rename netfilter patches to be in the 6xx range

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@2476 3c298f89-4303-0410-b956-a3cf2f4a3e73

8 files changed, 11617 insertions, 0 deletions

diff --git a/openwrt/target/linux/linux-2.4/patches/generic/601-netfilter_ipp2p.patch b/openwrt/target/linux/linux-2.4/patches/generic/601-netfilter_ipp2p.patch
new file mode 100644
index 0000000000..1314ae4fec
--- /dev/null
+++ b/openwrt/target/linux/linux-2.4/patches/generic/601-netfilter_ipp2p.patch
@@ -0,0 +1,720 @@
+diff -urN linux-2.4.29.old/include/linux/netfilter_ipv4/ipt_ipp2p.h linux-2.4.29/include/linux/netfilter_ipv4/ipt_ipp2p.h
+--- linux-2.4.29.old/include/linux/netfilter_ipv4/ipt_ipp2p.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29/include/linux/netfilter_ipv4/ipt_ipp2p.h	2005-03-12 00:44:17.000000000 +0100
+@@ -0,0 +1,29 @@
++#ifndef __IPT_IPP2P_H
++#define __IPT_IPP2P_H
++#define IPP2P_VERSION "0.7.4"
++
++struct ipt_p2p_info {
++    int cmd;
++    int debug;
++};
++
++#endif //__IPT_IPP2P_H
++
++#define SHORT_HAND_IPP2P	1 /* --ipp2p switch*/
++#define SHORT_HAND_DATA		4 /* --ipp2p-data switch*/
++#define SHORT_HAND_NONE		5 /* no short hand*/
++
++#define IPP2P_EDK		2
++#define IPP2P_DATA_KAZAA	8
++#define IPP2P_DATA_EDK		16
++#define IPP2P_DATA_DC		32
++#define IPP2P_DC		64
++#define IPP2P_DATA_GNU		128
++#define IPP2P_GNU		256
++#define IPP2P_KAZAA		512
++#define IPP2P_BIT		1024
++#define IPP2P_APPLE		2048
++#define IPP2P_SOUL		4096
++#define IPP2P_WINMX		8192
++#define IPP2P_ARES		16384
++
+diff -urN linux-2.4.29.old/net/ipv4/netfilter/Config.in linux-2.4.29/net/ipv4/netfilter/Config.in
+--- linux-2.4.29.old/net/ipv4/netfilter/Config.in	2005-03-12 00:40:38.000000000 +0100
++++ linux-2.4.29/net/ipv4/netfilter/Config.in	2005-03-12 00:42:57.000000000 +0100
+@@ -26,6 +26,7 @@
+   dep_tristate '  TOS match support' CONFIG_IP_NF_MATCH_TOS $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  recent match support' CONFIG_IP_NF_MATCH_RECENT $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  ECN match support' CONFIG_IP_NF_MATCH_ECN $CONFIG_IP_NF_IPTABLES
++  dep_tristate '  peer to peer traffic match support' CONFIG_IP_NF_MATCH_IPP2P $CONFIG_IP_NF_IPTABLES
+  
+   dep_tristate '  DSCP match support' CONFIG_IP_NF_MATCH_DSCP $CONFIG_IP_NF_IPTABLES
+  
+diff -urN linux-2.4.29.old/net/ipv4/netfilter/ipt_ipp2p.c linux-2.4.29/net/ipv4/netfilter/ipt_ipp2p.c
+--- linux-2.4.29.old/net/ipv4/netfilter/ipt_ipp2p.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29/net/ipv4/netfilter/ipt_ipp2p.c	2005-03-12 00:44:02.000000000 +0100
+@@ -0,0 +1,661 @@
++#if defined(MODVERSIONS)
++#include <linux/modversions.h>
++#endif
++#include <linux/module.h>
++#include <linux/netfilter_ipv4/ip_tables.h>
++#include <linux/version.h>
++#include <linux/netfilter_ipv4/ipt_ipp2p.h>
++//#include "ipt_ipp2p.h"
++#include <net/tcp.h>
++#include <net/udp.h>
++
++#define get_u8(X,O)  (*(__u8 *)(X + O))
++#define get_u16(X,O)  (*(__u16 *)(X + O))
++#define get_u32(X,O)  (*(__u32 *)(X + O))
++
++MODULE_AUTHOR("Eicke Friedrich <ipp2p@ipp2p.org>");
++MODULE_DESCRIPTION("An extension to iptables to identify P2P traffic.");
++MODULE_LICENSE("GPL");
++
++
++/*Search for UDP eDonkey/eMule/Kad commands*/
++int
++udp_search_edk (unsigned char *haystack, int packet_len)
++{
++    unsigned char *t = haystack;
++    t += 8;
++
++    switch (t[0]) {
++    case 0xe3: {	/*edonkey*/
++	switch (t[1]) {
++			/* e3 9a + 16Bytes Hash | size == 26 */
++	case 0x9a: if (packet_len == 26) return ((IPP2P_EDK * 100) + 1);
++			/* e3 96 xx yy zz kk | size == 14 | server status request */
++	case 0x96: if (packet_len == 14) return ((IPP2P_EDK * 100) + 2);
++			/* e3 a2 | size == 10 or 14 <-- recheck*/
++	}
++    }
++
++    case 0xc5: {	/*emule*/
++	switch (t[1]) {
++			/* c5 91 xx yy | size == 12 (8+4) | xx != 0x00  -- xx yy queue rating */
++	case 0x91: if ((packet_len == 12) && (t[2] != 0x00)) return ((IPP2P_EDK * 100) + 3);
++			/* c5 90 xx ..  yy | size == 26 (8+2+16) | xx .. yy == hash  -- file ping */
++	case 0x90: if ((packet_len == 26) && (t[2] != 0x00)) return ((IPP2P_EDK * 100) + 4);
++			/* c5 92 | size == 10 (8+2) -- file not found */
++	case 0x92: if (packet_len == 10) return ((IPP2P_EDK * 100) + 5);
++			/* c5 93 | size == 10 (8+2) -- queue full */
++	case 0x93: if (packet_len == 10) return ((IPP2P_EDK * 100) + 6);
++	}
++    }
++
++    case 0xe4: {	/*kad*/
++	switch (t[1]) {
++			/* e4 50 | size == 12 */
++	    case 0x50: if (packet_len == 12) return ((IPP2P_EDK * 100) + 7);
++			/* e4 58 | size == 14 */
++	    case 0x58: if ((packet_len == 14) && (t[2] != 0x00)) return ((IPP2P_EDK * 100) + 8);
++			/* e4 59 | size == 10 */
++	    case 0x59: if (packet_len == 10) return ((IPP2P_EDK * 100) + 9);
++			/* e4 30 .. | t[18] == 0x01 | size > 26 | --> search */
++	    case 0x30: if ((packet_len > 26) && (t[18] == 0x01)) return ((IPP2P_EDK * 100) + 10);
++			/* e4 28 .. 00 | t[68] == 0x00 | size > 76 */
++	    case 0x28: if ((packet_len > 76) && (t[68] == 0x00)) return ((IPP2P_EDK * 100) + 11);
++			/* e4 20 .. | size == 43 */
++	    case 0x20: if ((packet_len == 43) && (t[2] != 0x00) && (t[34] != 0x00)) return ((IPP2P_EDK * 100) + 12);
++			/* e4 00 .. 00 | size == 35 ? */
++	    case 0x00: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 13);
++			/* e4 10 .. 00 | size == 35 ? */
++	    case 0x10: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 14);
++			/* e4 18 .. 00 | size == 35 ? */
++	    case 0x18: if ((packet_len == 35) && (t[26] == 0x00)) return ((IPP2P_EDK * 100) + 15);
++			/* e4 40 .. | t[18] == 0x01 | t[19] == 0x00 | size > 40 */
++	    case 0x40: if ((packet_len > 40) && (t[18] == 0x01) && (t[19] == 0x00)) return ((IPP2P_EDK * 100) + 16);
++	}
++    }
++    
++    default: return 0;
++    } /* end of switch (t[0]) */
++}/*udp_search_edk*/
++
++
++/*Search for UDP Gnutella commands*/
++int
++udp_search_gnu (unsigned char *haystack, int packet_len)
++{
++    unsigned char *t = haystack;
++    t += 8;
++    
++    if (memcmp(t, "GND", 3) == 0) return ((IPP2P_GNU * 100) + 1);
++    if (memcmp(t, "GNUTELLA ", 9) == 0) return ((IPP2P_GNU * 100) + 2);
++    return 0;
++}/*udp_search_gnu*/
++
++
++/*Search for UDP KaZaA commands*/
++int
++udp_search_kazaa (unsigned char *haystack, int packet_len)
++{
++    unsigned char *t = haystack;
++    
++    if (t[packet_len-1] == 0x00){
++	t += (packet_len - 6);
++	if (memcmp(t, "KaZaA", 5) == 0) return (IPP2P_KAZAA * 100);
++    }
++    return 0;
++}/*udp_search_kazaa*/
++
++
++/*Search for UDP BitTorrent commands*/
++int
++udp_search_bit (unsigned char *haystack, int packet_len)
++{
++    unsigned char *t = haystack;
++    
++    /* packet_len has to be 24 */
++    if (packet_len != 24) return 0;
++
++    t += 8;    
++
++    /* ^ 00 00 04 17 27 10 19 80 */
++    if ((ntohl(get_u32(t, 0)) == 0x00000417) && (ntohl(get_u32(t, 4)) == 0x27101980)) return (IPP2P_BIT * 100);
++
++    return 0;
++}/*udp_search_bit*/
++
++
++
++/*Search for Ares commands*/
++int
++search_ares (unsigned char *haystack, int packet_len, int head_len)
++{
++    unsigned char *t = haystack;
++    t += head_len;
++
++    if ((packet_len - head_len) == 6){	/* possible connect command*/
++	if ((t[0] == 0x03) && (t[1] == 0x00) && (t[2] == 0x5a) && (t[3] == 0x04) && (t[4] == 0x03) && (t[5] == 0x05))
++	    return ((IPP2P_ARES * 100) + 1);			/* found connect packet: 03 00 5a 04 03 05 */
++    }
++    if ((packet_len - head_len) == 60){	/* possible download command*/
++	if ((t[59] == 0x0a) && (t[58] == 0x0a)){
++	    if (memcmp(t, "PUSH SHA1:", 10) == 0) /* found download command */
++	    	return ((IPP2P_ARES * 100) + 2);
++	}
++    }
++    return 0;
++} /*search_ares*/
++
++
++/*Search for SoulSeek commands*/
++int
++search_soul (unsigned char *haystack, int packet_len, int head_len)
++{
++    unsigned char *t = haystack;
++    t += head_len;
++
++    if (get_u16(t, 0) == (packet_len - head_len - 4)){
++	    /* xx xx 00 00 yy zz 00 00 .. | xx = sizeof(payload) - 4 */
++	if ((get_u16(t,2) == 0x0000) &&(t[4] != 0x00) && (get_u16(t,6) == 0x0000))
++	    return ((IPP2P_SOUL * 100) + 1);
++    } else {
++	    /* 00 00 00 00 00 00 00 00 + sizeof(payload) == 8*/
++	if (((packet_len - head_len) == 8) && (get_u32(t, 0) == 0x00000000) && (get_u32(t, 4) == 0x00000000))
++	    return ((IPP2P_SOUL * 100) + 2);
++    }
++    
++    /* 01 xx 00 00 00 yy .. zz 00 00 00 .. | xx == sizeof(nick) | yy .. zz == nick */
++    if ((t[0] == 0x01) && (t[2] == 0x00) && (get_u16(t,3) == 0x0000) && ((packet_len - head_len) > ((get_u8(t,1))+6)) && 
++	(t[(get_u8(t,1))+4] != 0x00) && (t[(get_u8(t,1))+5] == 0x01) && (t[(get_u8(t,1))+6] == 0x00))
++	    return ((IPP2P_SOUL * 100) + 3);
++    return 0;
++}
++
++
++/*Search for WinMX commands*/
++int
++search_winmx (unsigned char *haystack, int packet_len, int head_len)
++{
++    unsigned char *t = haystack;
++    int c;
++    t += head_len;
++
++    if (((packet_len - head_len) == 4) && (memcmp(t, "SEND", 4) == 0))  return ((IPP2P_WINMX * 100) + 1);
++    if (((packet_len - head_len) == 3) && (memcmp(t, "GET", 3) == 0))  return ((IPP2P_WINMX * 100) + 2);
++    if (packet_len < (head_len + 10)) return 0;
++
++    if ((memcmp(t, "SEND", 4) == 0) || (memcmp(t, "GET", 3) == 0)){
++        c = head_len + 4;
++	t += 4;
++	while (c < packet_len - 5) {
++	    if ((t[0] == 0x20) && (t[1] == 0x22)){
++		c += 2;
++		t += 2;
++		while (c < packet_len - 2) {
++		    if ((t[0] == 0x22) && (t[1] == 0x20)) return ((IPP2P_WINMX * 100) + 3);
++		    t++;
++		    c++;
++		}
++	    }
++	    t++;
++	    c++;
++	}    
++    }
++    return 0;
++} /*search_winmx*/
++
++
++/*Search for appleJuice commands*/
++int
++search_apple (unsigned char *haystack, int packet_len, int head_len)
++{
++    unsigned char *t = haystack;
++    t += head_len;
++    
++    if ((memcmp(t, "ajprot", 6) == 0) && (t[6] == 0x0d) && (t[7] == 0x0a))  return (IPP2P_APPLE * 100);
++    
++    return 0;
++}
++
++
++/*Search for BitTorrent commands*/
++int
++search_bittorrent (unsigned char *haystack, int packet_len, int head_len)
++{
++
++    unsigned char *t = haystack;
++    if (*(haystack+head_len) != 0x13) return 0; /*Bail out of first byte != 0x13*/
++    
++    t += head_len + 1;
++    
++    if (memcmp(t, "BitTorrent protocol", 19) == 0) return (IPP2P_BIT * 100);
++    return 0;
++}
++
++
++
++/*check for Kazaa get command*/
++int
++search_kazaa (unsigned char *haystack, int packet_len, int head_len)
++{
++    unsigned char *t = haystack;
++
++    if (!((*(haystack + packet_len - 2) == 0x0d) && (*(haystack + packet_len - 1) == 0x0a))) return 0;    
++
++    t += head_len;
++    if (memcmp(t, "GET /.hash=", 11) == 0)
++	return (IPP2P_DATA_KAZAA * 100);
++    else
++	return 0;
++}
++
++
++/*check for gnutella get command*/
++int
++search_gnu (unsigned char *haystack, int packet_len, int head_len)
++{
++    unsigned char *t = haystack;
++
++    if (!((*(haystack + packet_len - 2) == 0x0d) && (*(haystack + packet_len - 1) == 0x0a))) return 0;    
++
++    t += head_len;
++    if (memcmp(t, "GET /get/", 9) == 0)	return ((IPP2P_DATA_GNU * 100) + 1);
++    if (memcmp(t, "GET /uri-res/", 13) == 0) return ((IPP2P_DATA_GNU * 100) + 2); 
++    
++    return 0;
++}
++
++
++/*check for gnutella get commands and other typical data*/
++int
++search_all_gnu (unsigned char *haystack, int packet_len, int head_len)
++{
++    unsigned char *t = haystack;
++    int c;    
++
++    if (!((*(haystack + packet_len - 2) == 0x0d) && (*(haystack + packet_len - 1) == 0x0a))) return 0;
++
++    t += head_len;
++
++    if (memcmp(t, "GNUTELLA CONNECT/", 17) == 0) return ((IPP2P_GNU * 100) + 1);
++    if (memcmp(t, "GNUTELLA/", 9) == 0) return ((IPP2P_GNU * 100) + 2);    
++
++    if ((memcmp(t, "GET /get/", 9) == 0) || (memcmp(t, "GET /uri-res/", 13) == 0))
++    {        
++        c = head_len + 8;
++	t += 8;
++	while (c < packet_len - 22) {
++	    if ((t[0] == 0x0d) && (t[1] == 0x0a)) {
++		    t += 2;
++		    c += 2;
++		    if ((memcmp(t, "X-Gnutella-", 11) == 0) || (memcmp(t, "X-Queue:", 8) == 0)) return ((IPP2P_GNU * 100) + 3);
++	    } else {
++		t++;
++		c++;
++	    }    
++	}
++    }
++    return 0;
++}
++
++
++/*check for KaZaA download commands and other typical data*/
++int
++search_all_kazaa (unsigned char *haystack, int packet_len, int head_len)
++{
++    unsigned char *t = haystack;
++    int c;    
++
++    if (!((*(haystack + packet_len - 2) == 0x0d) && (*(haystack + packet_len - 1) == 0x0a))) return 0;
++
++    t += head_len;
++    if (memcmp(t, "GIVE ", 5) == 0) return ((IPP2P_KAZAA * 100) + 1);
++    
++    if (memcmp(t, "GET /", 5) == 0) {
++        c = head_len + 8;
++	t += 8;
++	while (c < packet_len - 22) {
++	    if ((t[0] == 0x0d) && (t[1] == 0x0a)) {
++		    t += 2;
++		    c += 2;
++		    if ( memcmp(t, "X-Kazaa-Username: ", 18) == 0 ) return ((IPP2P_KAZAA * 100) + 2);
++		    if ( memcmp(t, "User-Agent: PeerEnabler/", 24) == 0 ) return ((IPP2P_KAZAA * 100) + 3);
++	    } else {
++		t++;
++		c++;
++	    }    
++	}
++    }
++    
++    return 0;
++}
++
++/*fast check for edonkey file segment transfer command*/
++int
++search_edk (unsigned char *haystack, int packet_len, int head_len)
++{
++    if (*(haystack+head_len) != 0xe3) 
++	return 0;
++    else {
++	if (*(haystack+head_len+5) == 0x47) 
++	    return (IPP2P_DATA_EDK * 100);
++	else 	
++	    return 0;
++    }
++}
++
++
++
++/*intensive but slower search for some edonkey packets including size-check*/
++int
++search_all_edk (unsigned char *haystack, int packet_len, int head_len)
++{
++    unsigned char *t = haystack;
++    int cmd;
++    
++    if (*(haystack+head_len) == 0xd4) {
++	t += head_len;	
++	cmd = get_u16(t, 1);	
++	if (cmd == (packet_len - head_len - 5))	{
++	    switch (t[5]) {
++		case 0x82: return ((IPP2P_EDK * 100) + 42);
++		case 0x15: return ((IPP2P_EDK * 100) + 43);
++		default: return 0;
++	    }
++	}
++	return 0;    
++    }
++    
++    
++    if (*(haystack+head_len) == 0xc5) {	/*search for additional eMule packets*/
++	t += head_len;	
++	cmd = get_u16(t, 1);	
++
++	if (cmd == (packet_len - head_len - 5))	{
++	    switch (t[5]) {
++		case 0x01: return ((IPP2P_EDK * 100) + 30);
++		case 0x02: return ((IPP2P_EDK * 100) + 31);
++		case 0x60: return ((IPP2P_EDK * 100) + 32);
++		case 0x81: return ((IPP2P_EDK * 100) + 33);
++		case 0x82: return ((IPP2P_EDK * 100) + 34);
++		case 0x85: return ((IPP2P_EDK * 100) + 35);
++		case 0x86: return ((IPP2P_EDK * 100) + 36);
++		case 0x87: return ((IPP2P_EDK * 100) + 37);
++		case 0x40: return ((IPP2P_EDK * 100) + 38);
++		case 0x92: return ((IPP2P_EDK * 100) + 39);
++		case 0x93: return ((IPP2P_EDK * 100) + 40);
++		case 0x12: return ((IPP2P_EDK * 100) + 41);
++		default: return 0;
++	    }
++	}
++	
++	return 0;
++    }
++
++
++    if (*(haystack+head_len) != 0xe3) 
++	return 0;
++    else {
++	t += head_len;	
++	cmd = get_u16(t, 1);
++	if (cmd == (packet_len - head_len - 5)) {
++	    switch (t[5]) {
++		case 0x01: return ((IPP2P_EDK * 100) + 1);	/*Client: hello or Server:hello*/
++		case 0x50: return ((IPP2P_EDK * 100) + 2);	/*Client: file status*/
++		case 0x16: return ((IPP2P_EDK * 100) + 3);	/*Client: search*/
++		case 0x58: return ((IPP2P_EDK * 100) + 4);	/*Client: file request*/
++		case 0x48: return ((IPP2P_EDK * 100) + 5);	/*???*/
++		case 0x54: return ((IPP2P_EDK * 100) + 6);	/*???*/
++		case 0x47: return ((IPP2P_EDK * 100) + 7);	/*Client: file segment request*/
++		case 0x46: return ((IPP2P_EDK * 100) + 8); 	/*Client: download segment*/
++		case 0x4c: return ((IPP2P_EDK * 100) + 9);	/*Client: Hello-Answer*/
++		case 0x4f: return ((IPP2P_EDK * 100) + 10);	/*Client: file status request*/
++		case 0x59: return ((IPP2P_EDK * 100) + 11);	/*Client: file request answer*/
++		case 0x65: return ((IPP2P_EDK * 100) + 12);	/*Client: ???*/
++		case 0x66: return ((IPP2P_EDK * 100) + 13);	/*Client: ???*/
++		case 0x51: return ((IPP2P_EDK * 100) + 14);	/*Client: ???*/
++		case 0x52: return ((IPP2P_EDK * 100) + 15);	/*Client: ???*/
++		case 0x4d: return ((IPP2P_EDK * 100) + 16);	/*Client: ???*/
++		case 0x5c: return ((IPP2P_EDK * 100) + 17);	/*Client: ???*/
++		case 0x38: return ((IPP2P_EDK * 100) + 18);	/*Client: ???*/
++		case 0x69: return ((IPP2P_EDK * 100) + 19);	/*Client: ???*/
++		case 0x19: return ((IPP2P_EDK * 100) + 20);	/*Client: ???*/
++		case 0x42: return ((IPP2P_EDK * 100) + 21);	/*Client: ???*/
++		case 0x34: return ((IPP2P_EDK * 100) + 22);	/*Client: ???*/
++		case 0x94: return ((IPP2P_EDK * 100) + 23);	/*Client: ???*/
++		case 0x1c: return ((IPP2P_EDK * 100) + 24);	/*Client: ???*/
++		case 0x6a: return ((IPP2P_EDK * 100) + 25);	/*Client: ???*/
++		default: return 0;
++	    }
++	} else {
++	    if (cmd > packet_len - head_len - 5) {
++		if ((t[3] == 0x00) && (t[4] == 0x00)) {
++		    if (t[5] == 0x01) return ((IPP2P_EDK * 100) + 26);
++		    if (t[5] == 0x4c) return ((IPP2P_EDK * 100) + 27);
++		} 
++		return 0;
++		
++	    }	/*non edk packet*/
++	    if (t[cmd+5] == 0xe3) return ((IPP2P_EDK * 100) + 28);/*found another edk-command*/
++	    if (t[cmd+5] == 0xc5) return ((IPP2P_EDK * 100) + 29);/*found an emule-command*/	    
++	    return 0;
++	}
++    }
++}
++
++
++/*fast check for Direct Connect send command*/
++int
++search_dc (unsigned char *haystack, int packet_len, int head_len)
++{
++    unsigned char *t = haystack;
++
++    if (*(haystack+head_len) != 0x24 ) 
++	return 0;
++    else {
++	t += head_len + 1;
++        if (memcmp(t, "Send|", 5) == 0)
++	    return (IPP2P_DATA_DC * 100);
++	else
++	    return 0;
++    }	
++
++}
++
++
++/*intensive but slower check for all direct connect packets*/
++int
++search_all_dc (unsigned char *haystack, int packet_len, int head_len)
++{
++    unsigned char *t = haystack;
++
++    if ((*(haystack + head_len) == 0x24) && (*(haystack + packet_len - 1) == 0x7c)) {
++    	t += head_len + 1;
++	if (memcmp(t, "Lock ", 5) == 0)	 return ((IPP2P_DC * 100) + 1); /*hub: hello*/
++	if (memcmp(t, "Key ", 4) == 0)	 return ((IPP2P_DC * 100) + 2); /*client: hello*/
++	if (memcmp(t, "Hello ", 6) == 0) return ((IPP2P_DC * 100) + 3); /*hub:connected*/
++	if (memcmp(t, "MyNick ", 7) == 0) return ((IPP2P_DC * 100) + 4); /*client-client: hello*/
++	if (memcmp(t, "Search ", 7) == 0) return ((IPP2P_DC * 100) + 5); /*client: search*/
++	if (memcmp(t, "Send", 4) == 0)	 return ((IPP2P_DC * 100) + 6); /*client: start download*/
++	return 0;
++    } else
++	return 0;
++}
++
++
++static struct {
++    int command;
++    __u8 short_hand;			/*for fucntions included in short hands*/
++    int packet_len;
++    int (*function_name) (unsigned char *, int, int);
++} matchlist[] = {
++    {IPP2P_EDK,SHORT_HAND_IPP2P,40, &search_all_edk},
++    {IPP2P_DATA_KAZAA,SHORT_HAND_DATA,200, &search_kazaa},
++    {IPP2P_DATA_EDK,SHORT_HAND_DATA,60, &search_edk},
++    {IPP2P_DATA_DC,SHORT_HAND_DATA,26, &search_dc},
++    {IPP2P_DC,SHORT_HAND_IPP2P,25, search_all_dc},
++    {IPP2P_DATA_GNU,SHORT_HAND_DATA,40, &search_gnu},
++    {IPP2P_GNU,SHORT_HAND_IPP2P,35, &search_all_gnu},
++    {IPP2P_KAZAA,SHORT_HAND_IPP2P,35, &search_all_kazaa},
++    {IPP2P_BIT,SHORT_HAND_NONE,40, &search_bittorrent},
++    {IPP2P_APPLE,SHORT_HAND_NONE,20, &search_apple},
++    {IPP2P_SOUL,SHORT_HAND_NONE,25, &search_soul},
++    {IPP2P_WINMX,SHORT_HAND_NONE,20, &search_winmx},
++    {IPP2P_ARES,SHORT_HAND_NONE,25, &search_ares},
++    {0,0,0,NULL}
++};
++
++
++static struct {
++    int command;
++    __u8 short_hand;			/*for fucntions included in short hands*/
++    int packet_len;
++    int (*function_name) (unsigned char *, int);
++} udp_list[] = {
++    {IPP2P_KAZAA,SHORT_HAND_IPP2P,14, &udp_search_kazaa},
++    {IPP2P_BIT,SHORT_HAND_NONE,23, &udp_search_bit},
++    {IPP2P_GNU,SHORT_HAND_IPP2P,11, &udp_search_gnu},
++    {IPP2P_EDK,SHORT_HAND_IPP2P,9, &udp_search_edk},
++    {0,0,0,NULL}
++};
++
++
++static int
++match(const struct sk_buff *skb,
++      const struct net_device *in,
++      const struct net_device *out,
++      const void *matchinfo,
++      int offset,
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
++      const void *hdr,
++      u_int16_t datalen,
++#endif
++
++      int *hotdrop)
++{
++    const struct ipt_p2p_info *info = matchinfo;
++    unsigned char  *haystack;
++    struct iphdr *ip = skb->nh.iph;
++    int p2p_result = 0, i = 0;
++    int head_len;
++    int hlen = ntohs(ip->tot_len)-(ip->ihl*4);	/*hlen = packet-data length*/
++
++    /*must not be a fragment*/
++    if (offset) {
++	if (info->debug) printk("IPP2P.match: offset found %i \n",offset);
++	return 0;
++    }
++    
++    /*make sure that skb is linear*/
++    if(skb_is_nonlinear(skb)){
++	if (info->debug) printk("IPP2P.match: nonlinear skb found\n");
++	return 0;
++    }
++
++
++    haystack=(char *)ip+(ip->ihl*4);		/*haystack = packet data*/
++
++    switch (ip->protocol){
++	case IPPROTO_TCP:		/*what to do with a TCP packet*/
++	{
++	    struct tcphdr *tcph = (void *) ip + ip->ihl * 4;
++	    
++	    if (tcph->fin) return 0;  /*if FIN bit is set bail out*/
++	    if (tcph->syn) return 0;  /*if SYN bit is set bail out*/
++	    if (tcph->rst) return 0;  /*if RST bit is set bail out*/
++	    head_len = tcph->doff * 4; /*get TCP-Header-Size*/
++	    while (matchlist[i].command) {
++		if ((((info->cmd & matchlist[i].command) == matchlist[i].command) ||
++		    ((info->cmd & matchlist[i].short_hand) == matchlist[i].short_hand)) &&
++		    (hlen > matchlist[i].packet_len)) {
++			    p2p_result = matchlist[i].function_name(haystack, hlen, head_len);
++			    if (p2p_result) 
++			    {
++				if (info->debug) printk("IPP2P.debug:TCP-match: %i from: %u.%u.%u.%u:%i to: %u.%u.%u.%u:%i Length: %i\n", 
++				    p2p_result, NIPQUAD(ip->saddr),ntohs(tcph->source), NIPQUAD(ip->daddr),ntohs(tcph->dest),hlen);
++				return p2p_result;
++    			    }
++    		}
++	    i++;
++	    }
++	    return p2p_result;
++	}
++	
++	case IPPROTO_UDP:		/*what to do with an UDP packet*/
++	{
++	    struct udphdr *udph = (void *) ip + ip->ihl * 4;
++	    
++	    while (udp_list[i].command){
++		if ((((info->cmd & udp_list[i].command) == udp_list[i].command) ||
++		    ((info->cmd & udp_list[i].short_hand) == udp_list[i].short_hand)) &&
++		    (hlen > udp_list[i].packet_len)) {
++			    p2p_result = udp_list[i].function_name(haystack, hlen);
++			    if (p2p_result){
++				if (info->debug) printk("IPP2P.debug:UDP-match: %i from: %u.%u.%u.%u:%i to: %u.%u.%u.%u:%i Length: %i\n", 
++				    p2p_result, NIPQUAD(ip->saddr),ntohs(udph->source), NIPQUAD(ip->daddr),ntohs(udph->dest),hlen);
++				return p2p_result;
++			    }
++		}
++	    i++;
++	    }			
++	    return p2p_result;
++	}
++    
++	default: return 0;
++    }
++}
++
++
++
++static int
++checkentry(const char *tablename,
++            const struct ipt_ip *ip,
++	    void *matchinfo,
++	    unsigned int matchsize,
++	    unsigned int hook_mask)
++{
++        /* Must specify -p tcp */
++/*    if (ip->proto != IPPROTO_TCP || (ip->invflags & IPT_INV_PROTO)) {
++ *	printk("ipp2p: Only works on TCP packets, use -p tcp\n");
++ *	return 0;
++ *    }*/
++    return 1;
++}
++									    
++
++
++
++static struct ipt_match ipp2p_match = { 
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
++	{ NULL, NULL }, 
++	"ipp2p", 
++	&match, 
++	&checkentry, 
++	NULL, 
++	THIS_MODULE
++#endif
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
++	.name		= "ipp2p",
++	.match		= &match,
++	.checkentry	= &checkentry,
++	.me		= THIS_MODULE,
++#endif
++};
++
++
++static int __init init(void)
++{
++    printk(KERN_INFO "IPP2P v%s loading\n", IPP2P_VERSION);
++    return ipt_register_match(&ipp2p_match);
++}
++	
++static void __exit fini(void)
++{
++    ipt_unregister_match(&ipp2p_match);
++    printk(KERN_INFO "IPP2P v%s unloaded\n", IPP2P_VERSION);    
++}
++	
++module_init(init);
++module_exit(fini);
++
++
+diff -urN linux-2.4.29.old/net/ipv4/netfilter/Makefile linux-2.4.29/net/ipv4/netfilter/Makefile
+--- linux-2.4.29.old/net/ipv4/netfilter/Makefile	2005-03-12 00:40:38.000000000 +0100
++++ linux-2.4.29/net/ipv4/netfilter/Makefile	2005-03-12 00:42:57.000000000 +0100
+@@ -67,6 +67,7 @@
+ obj-$(CONFIG_IP_NF_MATCH_LIMIT) += ipt_limit.o
+ obj-$(CONFIG_IP_NF_MATCH_MARK) += ipt_mark.o
+ obj-$(CONFIG_IP_NF_MATCH_MAC) += ipt_mac.o
++obj-$(CONFIG_IP_NF_MATCH_IPP2P) += ipt_ipp2p.o
+ 
+ obj-$(CONFIG_IP_NF_MATCH_PKTTYPE) += ipt_pkttype.o
+ obj-$(CONFIG_IP_NF_MATCH_MULTIPORT) += ipt_multiport.o
diff --git a/openwrt/target/linux/linux-2.4/patches/generic/602-netfilter_layer7.patch b/openwrt/target/linux/linux-2.4/patches/generic/602-netfilter_layer7.patch
new file mode 100644
index 0000000000..55e817aa4f
--- /dev/null
+++ b/openwrt/target/linux/linux-2.4/patches/generic/602-netfilter_layer7.patch
@@ -0,0 +1,2050 @@
+diff -Nurp linux-2.4.30/Documentation/Configure.help linux-2.4.30-layer7/Documentation/Configure.help
+--- linux-2.4.30/Documentation/Configure.help	2005-04-03 20:42:19.000000000 -0500
++++ linux-2.4.30-layer7/Documentation/Configure.help	2005-05-03 18:37:03.000000000 -0500
+@@ -29056,6 +29056,23 @@ CONFIG_SOUND_WM97XX
+   
+   If unsure, say N.
+ 
++CONFIG_IP_NF_MATCH_LAYER7
++   Say Y if you want to be able to classify connections (and their 
++   packets) based on regular expression matching of their application 
++   layer data.   This is one way to classify applications such as 
++   peer-to-peer filesharing systems that do not always use the same 
++   port.
++
++   To compile it as a module, choose M here.  If unsure, say N.
++
++CONFIG_IP_NF_MATCH_LAYER7_DEBUG
++   Say Y to get lots of debugging output.
++
++CONFIG_IP_NF_MATCH_LAYER7_MAXDATALEN
++   Size of the buffer that the application layer data is stored in.
++   Unless you know what you're doing, leave it at the default of 2048
++   Bytes.
++
+ #
+ # A couple of things I keep forgetting:
+ #   capitalize: AppleTalk, Ethernet, DOS, DMA, FAT, FTP, Internet,
+diff -Nurp linux-2.4.30/include/linux/netfilter_ipv4/ip_conntrack.h linux-2.4.30-layer7/include/linux/netfilter_ipv4/ip_conntrack.h
+--- linux-2.4.30/include/linux/netfilter_ipv4/ip_conntrack.h	2005-04-03 20:42:20.000000000 -0500
++++ linux-2.4.30-layer7/include/linux/netfilter_ipv4/ip_conntrack.h	2005-05-03 18:37:03.000000000 -0500
+@@ -207,6 +207,17 @@ struct ip_conntrack
+ 	} nat;
+ #endif /* CONFIG_IP_NF_NAT_NEEDED */
+ 
++#if defined(CONFIG_IP_NF_MATCH_LAYER7) || defined(CONFIG_IP_NF_MATCH_LAYER7_MODULE)
++	struct {
++		unsigned int numpackets; /* surely this is kept track of somewhere else, right? I can't find it... */
++		char * app_proto; /* "http", "ftp", etc.  NULL if unclassifed */
++		
++		/* the application layer data so far.  NULL if ->numpackets > numpackets */
++		char * app_data; 
++
++		unsigned int app_data_len;
++	} layer7;
++#endif
+ };
+ 
+ /* get master conntrack via master expectation */
+diff -Nurp linux-2.4.30/include/linux/netfilter_ipv4/ipt_layer7.h linux-2.4.30-layer7/include/linux/netfilter_ipv4/ipt_layer7.h
+--- linux-2.4.30/include/linux/netfilter_ipv4/ipt_layer7.h	1969-12-31 18:00:00.000000000 -0600
++++ linux-2.4.30-layer7/include/linux/netfilter_ipv4/ipt_layer7.h	2005-05-03 18:37:03.000000000 -0500
+@@ -0,0 +1,26 @@
++/* 
++  By Matthew Strait <quadong@users.sf.net>, Dec 2003.
++  http://l7-filter.sf.net
++
++  This program is free software; you can redistribute it and/or
++  modify it under the terms of the GNU General Public License
++  as published by the Free Software Foundation; either version
++  2 of the License, or (at your option) any later version.
++  http://www.gnu.org/licenses/gpl.txt
++*/
++
++#ifndef _IPT_LAYER7_H
++#define _IPT_LAYER7_H
++
++#define MAX_PATTERN_LEN 8192
++#define MAX_PROTOCOL_LEN 256
++
++typedef char *(*proc_ipt_search) (char *, char, char *);
++
++struct ipt_layer7_info {
++    char protocol[MAX_PROTOCOL_LEN];
++    char invert:1;
++    char pattern[MAX_PATTERN_LEN];
++};
++
++#endif /* _IPT_LAYER7_H */
+diff -Nurp linux-2.4.30/net/ipv4/netfilter/Config.in linux-2.4.30-layer7/net/ipv4/netfilter/Config.in
+--- linux-2.4.30/net/ipv4/netfilter/Config.in	2005-01-19 08:10:13.000000000 -0600
++++ linux-2.4.30-layer7/net/ipv4/netfilter/Config.in	2005-05-03 18:37:03.000000000 -0500
+@@ -43,6 +43,10 @@ if [ "$CONFIG_IP_NF_IPTABLES" != "n" ]; 
+   if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+     dep_tristate '  Unclean match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_UNCLEAN $CONFIG_IP_NF_IPTABLES
+     dep_tristate '  Owner match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_OWNER $CONFIG_IP_NF_IPTABLES
++    dep_tristate '  Layer 7 match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_LAYER7 $CONFIG_IP_NF_CONNTRACK
++    dep_mbool '  Layer 7 debugging output (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_LAYER7_DEBUG $CONFIG_IP_NF_MATCH_LAYER7
++    int  '  Buffer size for application layer data (256-65536)' CONFIG_IP_NF_MATCH_LAYER7_MAXDATALEN 2048
++ 
+   fi
+ # The targets
+   dep_tristate '  Packet filtering' CONFIG_IP_NF_FILTER $CONFIG_IP_NF_IPTABLES 
+diff -Nurp linux-2.4.30/net/ipv4/netfilter/Makefile linux-2.4.30-layer7/net/ipv4/netfilter/Makefile
+--- linux-2.4.30/net/ipv4/netfilter/Makefile	2003-08-25 06:44:44.000000000 -0500
++++ linux-2.4.30-layer7/net/ipv4/netfilter/Makefile	2005-05-03 18:44:12.000000000 -0500
+@@ -86,6 +86,7 @@ obj-$(CONFIG_IP_NF_MATCH_STATE) += ipt_s
+ obj-$(CONFIG_IP_NF_MATCH_CONNTRACK) += ipt_conntrack.o
+ obj-$(CONFIG_IP_NF_MATCH_UNCLEAN) += ipt_unclean.o
+ obj-$(CONFIG_IP_NF_MATCH_TCPMSS) += ipt_tcpmss.o
++obj-$(CONFIG_IP_NF_MATCH_LAYER7) += ipt_layer7.o
+ 
+ # targets
+ obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
+diff -Nurp linux-2.4.30/net/ipv4/netfilter/ip_conntrack_core.c linux-2.4.30-layer7/net/ipv4/netfilter/ip_conntrack_core.c
+--- linux-2.4.30/net/ipv4/netfilter/ip_conntrack_core.c	2005-04-03 20:42:20.000000000 -0500
++++ linux-2.4.30-layer7/net/ipv4/netfilter/ip_conntrack_core.c	2005-05-03 18:37:03.000000000 -0500
+@@ -346,6 +346,14 @@ destroy_conntrack(struct nf_conntrack *n
+ 		}
+ 		kfree(ct->master);
+ 	}
++
++	#if defined(CONFIG_IP_NF_MATCH_LAYER7) || defined(CONFIG_IP_NF_MATCH_LAYER7_MODULE)
++	if(ct->layer7.app_proto)
++		kfree(ct->layer7.app_proto);
++	if(ct->layer7.app_data)
++		kfree(ct->layer7.app_data);
++	#endif
++	
+ 	WRITE_UNLOCK(&ip_conntrack_lock);
+ 
+ 	if (master)
+diff -Nurp linux-2.4.30/net/ipv4/netfilter/ip_conntrack_standalone.c linux-2.4.30-layer7/net/ipv4/netfilter/ip_conntrack_standalone.c
+--- linux-2.4.30/net/ipv4/netfilter/ip_conntrack_standalone.c	2005-04-03 20:42:20.000000000 -0500
++++ linux-2.4.30-layer7/net/ipv4/netfilter/ip_conntrack_standalone.c	2005-05-03 18:37:03.000000000 -0500
+@@ -107,6 +107,13 @@ print_conntrack(char *buffer, struct ip_
+ 		len += sprintf(buffer + len, "[ASSURED] ");
+ 	len += sprintf(buffer + len, "use=%u ",
+ 		       atomic_read(&conntrack->ct_general.use));
++
++	#if defined(CONFIG_IP_NF_MATCH_LAYER7) || defined(CONFIG_IP_NF_MATCH_LAYER7_MODULE)
++	if(conntrack->layer7.app_proto)
++		len += sprintf(buffer + len, "l7proto=%s ",
++				conntrack->layer7.app_proto); 
++	#endif
++
+ 	len += sprintf(buffer + len, "\n");
+ 
+ 	return len;
+diff -Nurp linux-2.4.30/net/ipv4/netfilter/ipt_layer7.c linux-2.4.30-layer7/net/ipv4/netfilter/ipt_layer7.c
+--- linux-2.4.30/net/ipv4/netfilter/ipt_layer7.c	1969-12-31 18:00:00.000000000 -0600
++++ linux-2.4.30-layer7/net/ipv4/netfilter/ipt_layer7.c	2005-05-03 18:37:03.000000000 -0500
+@@ -0,0 +1,557 @@
++/* 
++  Kernel module to match application layer (OSI layer 7) 
++  data in connections.
++  
++  http://l7-filter.sf.net
++
++  By Matthew Strait and Ethan Sommer, 2003-2005.
++
++  This program is free software; you can redistribute it and/or
++  modify it under the terms of the GNU General Public License
++  as published by the Free Software Foundation; either version
++  2 of the License, or (at your option) any later version.
++  http://www.gnu.org/licenses/gpl.txt
++
++  Based on ipt_string.c (C) 2000 Emmanuel Roger <winfield@freegates.be>
++  and cls_layer7.c (C) 2003 Matthew Strait, Ethan Sommer, Justin Levandoski
++*/
++
++#include <linux/module.h>
++#include <linux/skbuff.h>
++#include <linux/netfilter_ipv4/ip_conntrack.h>
++#include <linux/proc_fs.h>
++#include <linux/ctype.h>
++#include <net/ip.h>
++#include <net/tcp.h>
++#include <linux/netfilter_ipv4/lockhelp.h>
++
++#include "regexp/regexp.c"
++
++#include <linux/netfilter_ipv4/ipt_layer7.h>
++#include <linux/netfilter_ipv4/ip_tables.h>
++
++MODULE_AUTHOR("Matthew Strait <quadong@users.sf.net>, Ethan Sommer <sommere@users.sf.net>");
++MODULE_LICENSE("GPL");
++MODULE_DESCRIPTION("iptables application layer match module");
++
++#if defined(CONFIG_IP_NF_MATCH_LAYER7_DEBUG)
++	#define DPRINTK(format,args...) printk(format,##args)
++#else
++	#define DPRINTK(format,args...)
++#endif
++
++#define TOTAL_PACKETS master_conntrack->layer7.numpackets
++
++/* Number of packets whose data we look at.
++This can be modified through /proc/net/layer7_numpackets */
++static int num_packets = 8;
++
++static struct pattern_cache {
++	char * regex_string;
++	regexp * pattern;
++	struct pattern_cache * next;
++} * first_pattern_cache = NULL;
++
++/* I'm new to locking.  Here are my assumptions:
++
++- No one will write to /proc/net/layer7_numpackets over and over very fast; 
++  if they did, nothing awful would happen.
++
++- This code will never be processing the same packet twice at the same time,
++  because iptables rules are traversed in order.
++
++- It doesn't matter if two packets from different connections are in here at 
++  the same time, because they don't share any data.
++
++- It _does_ matter if two packets from the same connection are here at the same
++  time.  In this case, we have to protect the conntracks and the list of 
++  compiled patterns.
++*/
++DECLARE_RWLOCK(ct_lock);
++DECLARE_LOCK(list_lock);
++
++#if CONFIG_IP_NF_MATCH_LAYER7_DEBUG
++/* Converts an unfriendly string into a friendly one by 
++replacing unprintables with periods and all whitespace with " ". */
++static char * friendly_print(unsigned char * s)
++{
++	char * f = kmalloc(strlen(s) + 1, GFP_ATOMIC);
++	int i;
++
++	if(!f) {
++		if (net_ratelimit()) 
++			printk(KERN_ERR "layer7: out of memory in friendly_print, bailing.\n");
++		return NULL;
++	}
++
++	for(i = 0; i < strlen(s); i++){
++		if(isprint(s[i]) && s[i] < 128)	f[i] = s[i];
++		else if(isspace(s[i]))		f[i] = ' ';
++		else 				f[i] = '.';
++	}
++	f[i] = '\0';
++	return f;
++}
++
++static char dec2hex(int i)
++{
++	switch (i) {
++		case 0 ... 9:
++			return (char)(i + '0');
++			break;
++		case 10 ... 15:
++			return (char)(i - 10 + 'a');
++			break;
++		default:
++			if (net_ratelimit()) 
++				printk("Problem in dec2hex\n");
++			return '\0';
++	}
++}
++
++static char * hex_print(unsigned char * s)
++{
++	char * g = kmalloc(strlen(s)*3 + 1, GFP_ATOMIC);
++	int i;
++
++	if(!g) {
++		if (net_ratelimit()) 
++			printk(KERN_ERR "layer7: out of memory in hex_print, bailing.\n");
++		return NULL;
++	}
++
++	for(i = 0; i < strlen(s); i++) {
++		g[i*3    ] = dec2hex(s[i]/16);
++		g[i*3 + 1] = dec2hex(s[i]%16);
++		g[i*3 + 2] = ' ';
++	}
++	g[i*3] = '\0';
++
++	return g;
++}
++#endif // DEBUG
++
++/* Use instead of regcomp.  As we expect to be seeing the same regexps over and
++over again, it make sense to cache the results. */
++static regexp * compile_and_cache(char * regex_string, char * protocol) 
++{
++	struct pattern_cache * node               = first_pattern_cache;
++	struct pattern_cache * last_pattern_cache = first_pattern_cache;
++	struct pattern_cache * tmp;
++	unsigned int len;
++
++	while (node != NULL) {
++		if (!strcmp(node->regex_string, regex_string)) 
++			return node->pattern;
++
++		last_pattern_cache = node;/* points at the last non-NULL node */
++		node = node->next;
++	}
++
++	/* If we reach the end of the list, then we have not yet cached
++	   the pattern for this regex. Let's do that now. 
++	   Be paranoid about running out of memory to avoid list corruption. */
++	tmp = kmalloc(sizeof(struct pattern_cache), GFP_ATOMIC);
++
++	if(!tmp) {
++		if (net_ratelimit()) 
++			printk(KERN_ERR "layer7: out of memory in compile_and_cache, bailing.\n");
++		return NULL;
++	}
++
++	tmp->regex_string  = kmalloc(strlen(regex_string) + 1, GFP_ATOMIC);
++	tmp->pattern       = kmalloc(sizeof(struct regexp),    GFP_ATOMIC);
++	tmp->next = NULL;
++
++	if(!tmp->regex_string || !tmp->pattern) {
++		if (net_ratelimit()) 
++			printk(KERN_ERR "layer7: out of memory in compile_and_cache, bailing.\n");
++		kfree(tmp->regex_string);
++		kfree(tmp->pattern);
++		kfree(tmp);
++		return NULL;
++	}
++
++	/* Ok.  The new node is all ready now. */
++	node = tmp;
++
++	if(first_pattern_cache == NULL) /* list is empty */
++		first_pattern_cache = node; /* make node the beginning */
++	else
++		last_pattern_cache->next = node; /* attach node to the end */
++
++	/* copy the string and compile the regex */
++	len = strlen(regex_string);
++	DPRINTK("About to compile this: \"%s\"\n", regex_string);
++	node->pattern = regcomp(regex_string, &len);
++	if ( !node->pattern ) {
++		if (net_ratelimit()) 
++			printk(KERN_ERR "layer7: Error compiling regexp \"%s\" (%s)\n", regex_string, protocol);
++		/* pattern is now cached as NULL, so we won't try again. */
++	}
++
++	strcpy(node->regex_string, regex_string);
++	return node->pattern;
++}
++
++static int can_handle(const struct sk_buff *skb)
++{
++	if(!skb->nh.iph) /* not IP */
++		return 0;
++	if(skb->nh.iph->protocol != IPPROTO_TCP &&
++	   skb->nh.iph->protocol != IPPROTO_UDP &&
++	   skb->nh.iph->protocol != IPPROTO_ICMP)
++		return 0;
++	return 1;
++}
++
++/* Returns offset the into the skb->data that the application data starts */
++static int app_data_offset(const struct sk_buff *skb)
++{
++	/* In case we are ported somewhere (ebtables?) where skb->nh.iph 
++	isn't set, this can be gotten from 4*(skb->data[0] & 0x0f) as well. */
++	int ip_hl = 4*skb->nh.iph->ihl;
++
++	if( skb->nh.iph->protocol == IPPROTO_TCP ) {
++		/* 12 == offset into TCP header for the header length field. 
++		Can't get this with skb->h.th->doff because the tcphdr 
++		struct doesn't get set when routing (this is confirmed to be 
++		true in Netfilter as well as QoS.) */
++		int tcp_hl = 4*(skb->data[ip_hl + 12] >> 4);
++
++		return ip_hl + tcp_hl;
++	} else if( skb->nh.iph->protocol == IPPROTO_UDP  ) {
++		return ip_hl + 8; /* UDP header is always 8 bytes */
++	} else if( skb->nh.iph->protocol == IPPROTO_ICMP ) {
++		return ip_hl + 8; /* ICMP header is 8 bytes */
++	} else {
++		if (net_ratelimit()) 
++			printk(KERN_ERR "layer7: tried to handle unknown protocol!\n");
++		return ip_hl + 8; /* something reasonable */
++	}
++}
++
++/* handles whether there's a match when we aren't appending data anymore */
++static int match_no_append(struct ip_conntrack * conntrack, struct ip_conntrack * master_conntrack,
++			enum ip_conntrack_info ctinfo, enum ip_conntrack_info master_ctinfo,
++			struct ipt_layer7_info * info)
++{
++	/* If we're in here, throw the app data away */
++	WRITE_LOCK(&ct_lock);
++	if(master_conntrack->layer7.app_data != NULL) {
++
++	#ifdef CONFIG_IP_NF_MATCH_LAYER7_DEBUG
++		if(!master_conntrack->layer7.app_proto) {
++			char * f = friendly_print(master_conntrack->layer7.app_data);
++			char * g = hex_print(master_conntrack->layer7.app_data);
++			DPRINTK("\nl7-filter gave up after %d bytes (%d packets):\n%s\n",
++				strlen(f), 
++				TOTAL_PACKETS, f);
++			kfree(f); 
++			DPRINTK("In hex: %s\n", g);
++			kfree(g);
++		}
++	#endif
++
++		kfree(master_conntrack->layer7.app_data);
++		master_conntrack->layer7.app_data = NULL; /* don't free again */
++	}
++	WRITE_UNLOCK(&ct_lock);
++
++	if(master_conntrack->layer7.app_proto){
++		/* Here child connections set their .app_proto (for /proc/net/ip_conntrack) */
++		WRITE_LOCK(&ct_lock);
++		if(!conntrack->layer7.app_proto) {
++			conntrack->layer7.app_proto = kmalloc(strlen(master_conntrack->layer7.app_proto)+1, GFP_ATOMIC);
++			if(!conntrack->layer7.app_proto){
++				if (net_ratelimit()) 
++					printk(KERN_ERR "layer7: out of memory in match_no_append, bailing.\n");
++				WRITE_UNLOCK(&ct_lock);
++				return 1;
++			}
++			strcpy(conntrack->layer7.app_proto, master_conntrack->layer7.app_proto);
++		}
++		WRITE_UNLOCK(&ct_lock);
++	
++		return (!strcmp(master_conntrack->layer7.app_proto, info->protocol));
++	}
++	else {
++		/* If not classified, set to "unknown" to distinguish from 
++		connections that are still being tested. */
++		WRITE_LOCK(&ct_lock);
++		master_conntrack->layer7.app_proto = kmalloc(strlen("unknown")+1, GFP_ATOMIC);
++		if(!master_conntrack->layer7.app_proto){
++			if (net_ratelimit()) 
++				printk(KERN_ERR "layer7: out of memory in match_no_append, bailing.\n");
++			WRITE_UNLOCK(&ct_lock);
++			return 1;
++		}
++		strcpy(master_conntrack->layer7.app_proto, "unknown");
++		WRITE_UNLOCK(&ct_lock);
++		return 0;
++	}
++}
++
++/* add the new app data to the conntrack.  Return number of bytes added. */
++static int add_data(struct ip_conntrack * master_conntrack, 
++			char * app_data, int appdatalen)
++{
++	int length = 0, i;
++	int oldlength = master_conntrack->layer7.app_data_len;
++
++	/* Strip nulls. Make everything lower case (our regex lib doesn't
++	do case insensitivity).  Add it to the end of the current data. */
++	for(i = 0; i < CONFIG_IP_NF_MATCH_LAYER7_MAXDATALEN-oldlength-1 && 
++		   i < appdatalen; i++) {
++		if(app_data[i] != '\0') {
++			master_conntrack->layer7.app_data[length+oldlength] = 
++				/* the kernel version of tolower mungs 'upper ascii' */
++				isascii(app_data[i])? tolower(app_data[i]) : app_data[i];
++			length++;
++		}
++	}
++
++	master_conntrack->layer7.app_data[length+oldlength] = '\0';
++	master_conntrack->layer7.app_data_len = length + oldlength;
++
++	return length;
++}
++
++/* Returns true on match and false otherwise.  */
++static int match(/* const */struct sk_buff *skb, const struct net_device *in,
++		 const struct net_device *out, const void *matchinfo,
++		 int offset,		   int *hotdrop)
++{
++	struct ipt_layer7_info * info = (struct ipt_layer7_info *)matchinfo;
++	enum ip_conntrack_info master_ctinfo, ctinfo;
++	struct ip_conntrack *master_conntrack, *conntrack;
++	unsigned char * app_data;  
++	unsigned int pattern_result, appdatalen;
++	regexp * comppattern;
++
++	if(!can_handle(skb)){
++		DPRINTK("layer7: This is some protocol I can't handle.\n");
++		return info->invert;
++	}
++
++	/* Treat the parent and all its children together as one connection, 
++	except for the purpose of setting conntrack->layer7.app_proto in the 
++	actual connection. This makes /proc/net/ip_conntrack somewhat more 
++	satisfying. */
++	if(!(conntrack	= ip_conntrack_get((struct sk_buff *)skb, &ctinfo)) ||
++	   !(master_conntrack = ip_conntrack_get((struct sk_buff *)skb, &master_ctinfo))) {
++		DPRINTK("layer7: packet is not from a known connection, giving up.\n");
++		return info->invert;
++	}
++	
++	/* Try to get a master conntrack (and its master etc) for FTP, etc. */
++	while (master_ct(master_conntrack) != NULL)
++		master_conntrack = master_ct(master_conntrack);
++
++	if(!skb->cb[0]){
++		WRITE_LOCK(&ct_lock);
++		master_conntrack->layer7.numpackets++;/*starts at 0 via memset*/
++		WRITE_UNLOCK(&ct_lock);
++	}
++
++	/* if we've classified it or seen too many packets */
++	if(TOTAL_PACKETS > num_packets || 
++	   master_conntrack->layer7.app_proto) {
++	
++		pattern_result = match_no_append(conntrack, master_conntrack, ctinfo, master_ctinfo, info);
++	
++		/* skb->cb[0] == seen. Avoid doing things twice if there are two l7 
++		rules. I'm not sure that using cb for this purpose is correct, although
++		it says "put your private variables there". But it doesn't look like it
++		is being used for anything else in the skbs that make it here. How can
++		I write to cb without making the compiler angry? */
++		skb->cb[0] = 1; /* marking it seen here is probably irrelevant, but consistant */
++
++		return (pattern_result ^ info->invert);
++	}
++
++	if(skb_is_nonlinear(skb)){
++		if(skb_linearize(skb, GFP_ATOMIC) != 0){
++			if (net_ratelimit()) 
++				printk(KERN_ERR "layer7: failed to linearize packet, bailing.\n");
++			return info->invert;
++		}
++	}
++	
++	/* now that the skb is linearized, it's safe to set these. */
++	app_data = skb->data + app_data_offset(skb);
++	appdatalen = skb->tail - app_data;
++
++	LOCK_BH(&list_lock);
++	/* the return value gets checked later, when we're ready to use it */
++	comppattern = compile_and_cache(info->pattern, info->protocol);
++	UNLOCK_BH(&list_lock);
++
++	/* On the first packet of a connection, allocate space for app data */
++	WRITE_LOCK(&ct_lock);
++	if(TOTAL_PACKETS == 1 && !skb->cb[0] && !master_conntrack->layer7.app_data) {
++		master_conntrack->layer7.app_data = kmalloc(CONFIG_IP_NF_MATCH_LAYER7_MAXDATALEN, GFP_ATOMIC);
++		if(!master_conntrack->layer7.app_data){
++			if (net_ratelimit())
++				printk(KERN_ERR "layer7: out of memory in match, bailing.\n");
++			WRITE_UNLOCK(&ct_lock);
++			return info->invert;
++		}
++
++		master_conntrack->layer7.app_data[0] = '\0';
++	}
++	WRITE_UNLOCK(&ct_lock);
++
++	/* Can be here, but unallocated, if numpackets is increased near 
++	the beginning of a connection */
++	if(master_conntrack->layer7.app_data == NULL)
++		return (info->invert); /* unmatched */
++
++	if(!skb->cb[0]){
++		int newbytes;
++		WRITE_LOCK(&ct_lock);
++		newbytes = add_data(master_conntrack, app_data, appdatalen);
++		WRITE_UNLOCK(&ct_lock);
++
++		if(newbytes == 0) { /* didn't add any data */
++			skb->cb[0] = 1;
++			/* Didn't match before, not going to match now */
++			return info->invert;
++		}
++	}
++
++	/* If looking for "unknown", then never match.  "Unknown" means that
++	we've given up; we're still trying with these packets. */
++	if(!strcmp(info->protocol, "unknown")) {
++		pattern_result = 0;
++	/* If the regexp failed to compile, don't bother running it */
++	} else if(comppattern && regexec(comppattern, master_conntrack->layer7.app_data)) {
++		DPRINTK("layer7: regexec positive: %s!\n", info->protocol);
++		pattern_result = 1;
++	} else pattern_result = 0;
++
++	if(pattern_result) {
++		WRITE_LOCK(&ct_lock);
++		master_conntrack->layer7.app_proto = kmalloc(strlen(info->protocol)+1, GFP_ATOMIC);
++		if(!master_conntrack->layer7.app_proto){
++			if (net_ratelimit()) 
++				printk(KERN_ERR "layer7: out of memory in match, bailing.\n");
++			WRITE_UNLOCK(&ct_lock);
++			return (pattern_result ^ info->invert);
++		}
++		strcpy(master_conntrack->layer7.app_proto, info->protocol);
++		WRITE_UNLOCK(&ct_lock);
++	}
++
++	/* mark the packet seen */
++	skb->cb[0] = 1;
++
++	return (pattern_result ^ info->invert);
++}
++
++static int checkentry(const char *tablename, const struct ipt_ip *ip,
++	   void *matchinfo, unsigned int matchsize, unsigned int hook_mask)
++{
++	if (matchsize != IPT_ALIGN(sizeof(struct ipt_layer7_info))) 
++		return 0;
++	return 1;
++}
++
++static struct ipt_match layer7_match = { 
++	.name = "layer7", 
++	.match = &match, 
++	.checkentry = &checkentry, 
++	.me = THIS_MODULE 
++};
++
++/* taken from drivers/video/modedb.c */
++static int my_atoi(const char *s)
++{
++	int val = 0;
++
++	for (;; s++) {
++		switch (*s) {
++		case '0'...'9':
++			val = 10*val+(*s-'0');
++			break;
++		default:
++			return val;
++		}
++	}
++}
++
++/* write out num_packets to userland. */
++static int layer7_read_proc(char* page, char ** start, off_t off, int count, 
++		     int* eof, void * data) 
++{
++	if(num_packets > 99 && net_ratelimit()) 
++		printk(KERN_ERR "layer7: NOT REACHED. num_packets too big\n");
++	
++	page[0] = num_packets/10 + '0';
++	page[1] = num_packets%10 + '0';
++	page[2] = '\n';
++	page[3] = '\0';
++		
++	*eof=1;
++
++	return 3;
++}
++
++/* Read in num_packets from userland */
++static int layer7_write_proc(struct file* file, const char* buffer, 
++		      unsigned long count, void *data) 
++{
++	char * foo = kmalloc(count, GFP_ATOMIC);
++
++	if(!foo){
++		if (net_ratelimit()) 
++			printk(KERN_ERR "layer7: out of memory, bailing. num_packets unchanged.\n");
++		return count;
++	}
++
++	copy_from_user(foo, buffer, count);
++
++	num_packets = my_atoi(foo);
++	kfree (foo);
++
++	/* This has an arbitrary limit to make the math easier. I'm lazy. 
++	But anyway, 99 is a LOT! If you want more, you're doing it wrong! */
++	if(num_packets > 99) {
++		printk(KERN_WARNING "layer7: num_packets can't be > 99.\n");
++		num_packets = 99;
++	} else if(num_packets < 1) {
++		printk(KERN_WARNING "layer7: num_packets can't be < 1.\n");
++		num_packets = 1;
++	}
++	
++	return count;
++}
++
++/* register the proc file */
++static void layer7_init_proc(void)
++{
++	struct proc_dir_entry* entry;
++	entry = create_proc_entry("layer7_numpackets", 0644, proc_net);
++	entry->read_proc = layer7_read_proc;
++	entry->write_proc = layer7_write_proc;
++}
++
++static void layer7_cleanup_proc(void)
++{
++	remove_proc_entry("layer7_numpackets", proc_net);
++}
++
++static int __init init(void)
++{
++	layer7_init_proc();
++	return ipt_register_match(&layer7_match);
++}
++
++static void __exit fini(void)
++{
++	layer7_cleanup_proc();
++	ipt_unregister_match(&layer7_match);
++}
++
++module_init(init);
++module_exit(fini);
+diff -Nurp linux-2.4.30/net/ipv4/netfilter/regexp/regexp.c linux-2.4.30-layer7/net/ipv4/netfilter/regexp/regexp.c
+--- linux-2.4.30/net/ipv4/netfilter/regexp/regexp.c	1969-12-31 18:00:00.000000000 -0600
++++ linux-2.4.30-layer7/net/ipv4/netfilter/regexp/regexp.c	2005-05-03 18:37:03.000000000 -0500
+@@ -0,0 +1,1195 @@
++/*
++ * regcomp and regexec -- regsub and regerror are elsewhere
++ * @(#)regexp.c	1.3 of 18 April 87
++ *
++ *	Copyright (c) 1986 by University of Toronto.
++ *	Written by Henry Spencer.  Not derived from licensed software.
++ *
++ *	Permission is granted to anyone to use this software for any
++ *	purpose on any computer system, and to redistribute it freely,
++ *	subject to the following restrictions:
++ *
++ *	1. The author is not responsible for the consequences of use of
++ *		this software, no matter how awful, even if they arise
++ *		from defects in it.
++ *
++ *	2. The origin of this software must not be misrepresented, either
++ *		by explicit claim or by omission.
++ *
++ *	3. Altered versions must be plainly marked as such, and must not
++ *		be misrepresented as being the original software.
++ *
++ * Beware that some of this code is subtly aware of the way operator
++ * precedence is structured in regular expressions.  Serious changes in
++ * regular-expression syntax might require a total rethink.
++ *
++ * This code was modified by Ethan Sommer to work within the kernel
++ * (it now uses kmalloc etc..)
++ * 
++ * Modified slightly by Matthew Strait to use more modern C.
++ */
++
++#include "regexp.h"
++#include "regmagic.h"
++
++/* added by ethan and matt.  Lets it work in both kernel and user space.
++(So iptables can use it, for instance.)  Yea, it goes both ways... */
++#if __KERNEL__
++  #define malloc(foo) kmalloc(foo,GFP_ATOMIC)
++#else
++  #define printk(format,args...) printf(format,##args)
++#endif
++
++void regerror(char * s)
++{
++        printk("<3>Regexp: %s\n", s);
++        /* NOTREACHED */
++}
++
++/*
++ * The "internal use only" fields in regexp.h are present to pass info from
++ * compile to execute that permits the execute phase to run lots faster on
++ * simple cases.  They are:
++ *
++ * regstart	char that must begin a match; '\0' if none obvious
++ * reganch	is the match anchored (at beginning-of-line only)?
++ * regmust	string (pointer into program) that match must include, or NULL
++ * regmlen	length of regmust string
++ *
++ * Regstart and reganch permit very fast decisions on suitable starting points
++ * for a match, cutting down the work a lot.  Regmust permits fast rejection
++ * of lines that cannot possibly match.  The regmust tests are costly enough
++ * that regcomp() supplies a regmust only if the r.e. contains something
++ * potentially expensive (at present, the only such thing detected is * or +
++ * at the start of the r.e., which can involve a lot of backup).  Regmlen is
++ * supplied because the test in regexec() needs it and regcomp() is computing
++ * it anyway.
++ */
++
++/*
++ * Structure for regexp "program".  This is essentially a linear encoding
++ * of a nondeterministic finite-state machine (aka syntax charts or
++ * "railroad normal form" in parsing technology).  Each node is an opcode
++ * plus a "next" pointer, possibly plus an operand.  "Next" pointers of
++ * all nodes except BRANCH implement concatenation; a "next" pointer with
++ * a BRANCH on both ends of it is connecting two alternatives.  (Here we
++ * have one of the subtle syntax dependencies:  an individual BRANCH (as
++ * opposed to a collection of them) is never concatenated with anything
++ * because of operator precedence.)  The operand of some types of node is
++ * a literal string; for others, it is a node leading into a sub-FSM.  In
++ * particular, the operand of a BRANCH node is the first node of the branch.
++ * (NB this is *not* a tree structure:  the tail of the branch connects
++ * to the thing following the set of BRANCHes.)  The opcodes are:
++ */
++
++/* definition	number	opnd?	meaning */
++#define	END	0	/* no	End of program. */
++#define	BOL	1	/* no	Match "" at beginning of line. */
++#define	EOL	2	/* no	Match "" at end of line. */
++#define	ANY	3	/* no	Match any one character. */
++#define	ANYOF	4	/* str	Match any character in this string. */
++#define	ANYBUT	5	/* str	Match any character not in this string. */
++#define	BRANCH	6	/* node	Match this alternative, or the next... */
++#define	BACK	7	/* no	Match "", "next" ptr points backward. */
++#define	EXACTLY	8	/* str	Match this string. */
++#define	NOTHING	9	/* no	Match empty string. */
++#define	STAR	10	/* node	Match this (simple) thing 0 or more times. */
++#define	PLUS	11	/* node	Match this (simple) thing 1 or more times. */
++#define	OPEN	20	/* no	Mark this point in input as start of #n. */
++			/*	OPEN+1 is number 1, etc. */
++#define	CLOSE	30	/* no	Analogous to OPEN. */
++
++/*
++ * Opcode notes:
++ *
++ * BRANCH	The set of branches constituting a single choice are hooked
++ *		together with their "next" pointers, since precedence prevents
++ *		anything being concatenated to any individual branch.  The
++ *		"next" pointer of the last BRANCH in a choice points to the
++ *		thing following the whole choice.  This is also where the
++ *		final "next" pointer of each individual branch points; each
++ *		branch starts with the operand node of a BRANCH node.
++ *
++ * BACK		Normal "next" pointers all implicitly point forward; BACK
++ *		exists to make loop structures possible.
++ *
++ * STAR,PLUS	'?', and complex '*' and '+', are implemented as circular
++ *		BRANCH structures using BACK.  Simple cases (one character
++ *		per match) are implemented with STAR and PLUS for speed
++ *		and to minimize recursive plunges.
++ *
++ * OPEN,CLOSE	...are numbered at compile time.
++ */
++
++/*
++ * A node is one char of opcode followed by two chars of "next" pointer.
++ * "Next" pointers are stored as two 8-bit pieces, high order first.  The
++ * value is a positive offset from the opcode of the node containing it.
++ * An operand, if any, simply follows the node.  (Note that much of the
++ * code generation knows about this implicit relationship.)
++ *
++ * Using two bytes for the "next" pointer is vast overkill for most things,
++ * but allows patterns to get big without disasters.
++ */
++#define	OP(p)	(*(p))
++#define	NEXT(p)	(((*((p)+1)&0377)<<8) + (*((p)+2)&0377))
++#define	OPERAND(p)	((p) + 3)
++
++/*
++ * See regmagic.h for one further detail of program structure.
++ */
++
++
++/*
++ * Utility definitions.
++ */
++#ifndef CHARBITS
++#define	UCHARAT(p)	((int)*(unsigned char *)(p))
++#else
++#define	UCHARAT(p)	((int)*(p)&CHARBITS)
++#endif
++
++#define	FAIL(m)	{ regerror(m); return(NULL); }
++#define	ISMULT(c)	((c) == '*' || (c) == '+' || (c) == '?')
++#define	META	"^$.[()|?+*\\"
++
++/*
++ * Flags to be passed up and down.
++ */
++#define	HASWIDTH	01	/* Known never to match null string. */
++#define	SIMPLE		02	/* Simple enough to be STAR/PLUS operand. */
++#define	SPSTART		04	/* Starts with * or +. */
++#define	WORST		0	/* Worst case. */
++
++/*
++ * Global work variables for regcomp().
++ */
++static char *regparse;		/* Input-scan pointer. */
++static int regnpar;		/* () count. */
++static char regdummy;
++static char *regcode;		/* Code-emit pointer; &regdummy = don't. */
++static long regsize;		/* Code size. */
++
++/*
++ * Forward declarations for regcomp()'s friends.
++ */
++#ifndef STATIC
++#define	STATIC	static
++#endif
++STATIC char *reg(int paren,int *flagp);
++STATIC char *regbranch(int *flagp);
++STATIC char *regpiece(int *flagp);
++STATIC char *regatom(int *flagp);
++STATIC char *regnode(char op);
++STATIC char *regnext(char *p);
++STATIC void regc(char b);
++STATIC void reginsert(char op, char *opnd);
++STATIC void regtail(char *p, char *val);
++STATIC void regoptail(char *p, char *val);
++
++
++__kernel_size_t my_strcspn(const char *s1,const char *s2)
++{
++        char *scan1;
++        char *scan2;
++        int count;
++
++        count = 0;
++        for (scan1 = (char *)s1; *scan1 != '\0'; scan1++) {
++                for (scan2 = (char *)s2; *scan2 != '\0';)       /* ++ moved down. */
++                        if (*scan1 == *scan2++)
++                                return(count);
++                count++;
++        }
++        return(count);
++}
++
++/*
++ - regcomp - compile a regular expression into internal code
++ *
++ * We can't allocate space until we know how big the compiled form will be,
++ * but we can't compile it (and thus know how big it is) until we've got a
++ * place to put the code.  So we cheat:  we compile it twice, once with code
++ * generation turned off and size counting turned on, and once "for real".
++ * This also means that we don't allocate space until we are sure that the
++ * thing really will compile successfully, and we never have to move the
++ * code and thus invalidate pointers into it.  (Note that it has to be in
++ * one piece because free() must be able to free it all.)
++ *
++ * Beware that the optimization-preparation code in here knows about some
++ * of the structure of the compiled regexp.
++ */
++regexp *
++regcomp(char *exp,int *patternsize)
++{
++	register regexp *r;
++	register char *scan;
++	register char *longest;
++	register int len;
++	int flags;
++	/* commented out by ethan
++	   extern char *malloc();
++	*/
++
++	if (exp == NULL)
++		FAIL("NULL argument");
++
++	/* First pass: determine size, legality. */
++	regparse = exp;
++	regnpar = 1;
++	regsize = 0L;
++	regcode = &regdummy;
++	regc(MAGIC);
++	if (reg(0, &flags) == NULL)
++		return(NULL);
++
++	/* Small enough for pointer-storage convention? */
++	if (regsize >= 32767L)		/* Probably could be 65535L. */
++		FAIL("regexp too big");
++
++	/* Allocate space. */
++	*patternsize=sizeof(regexp) + (unsigned)regsize;
++	r = (regexp *)malloc(sizeof(regexp) + (unsigned)regsize);
++	if (r == NULL)
++		FAIL("out of space");
++
++	/* Second pass: emit code. */
++	regparse = exp;
++	regnpar = 1;
++	regcode = r->program;
++	regc(MAGIC);
++	if (reg(0, &flags) == NULL)
++		return(NULL);
++
++	/* Dig out information for optimizations. */
++	r->regstart = '\0';	/* Worst-case defaults. */
++	r->reganch = 0;
++	r->regmust = NULL;
++	r->regmlen = 0;
++	scan = r->program+1;			/* First BRANCH. */
++	if (OP(regnext(scan)) == END) {		/* Only one top-level choice. */
++		scan = OPERAND(scan);
++
++		/* Starting-point info. */
++		if (OP(scan) == EXACTLY)
++			r->regstart = *OPERAND(scan);
++		else if (OP(scan) == BOL)
++			r->reganch++;
++
++		/*
++		 * If there's something expensive in the r.e., find the
++		 * longest literal string that must appear and make it the
++		 * regmust.  Resolve ties in favor of later strings, since
++		 * the regstart check works with the beginning of the r.e.
++		 * and avoiding duplication strengthens checking.  Not a
++		 * strong reason, but sufficient in the absence of others.
++		 */
++		if (flags&SPSTART) {
++			longest = NULL;
++			len = 0;
++			for (; scan != NULL; scan = regnext(scan))
++				if (OP(scan) == EXACTLY && strlen(OPERAND(scan)) >= len) {
++					longest = OPERAND(scan);
++					len = strlen(OPERAND(scan));
++				}
++			r->regmust = longest;
++			r->regmlen = len;
++		}
++	}
++
++	return(r);
++}
++
++/*
++ - reg - regular expression, i.e. main body or parenthesized thing
++ *
++ * Caller must absorb opening parenthesis.
++ *
++ * Combining parenthesis handling with the base level of regular expression
++ * is a trifle forced, but the need to tie the tails of the branches to what
++ * follows makes it hard to avoid.
++ */
++static char *
++reg(int paren, int *flagp /* Parenthesized? */ )
++{
++	register char *ret;
++	register char *br;
++	register char *ender;
++	register int parno = 0; /* 0 makes gcc happy */
++	int flags;
++
++	*flagp = HASWIDTH;	/* Tentatively. */
++
++	/* Make an OPEN node, if parenthesized. */
++	if (paren) {
++		if (regnpar >= NSUBEXP)
++			FAIL("too many ()");
++		parno = regnpar;
++		regnpar++;
++		ret = regnode(OPEN+parno);
++	} else
++		ret = NULL;
++
++	/* Pick up the branches, linking them together. */
++	br = regbranch(&flags);
++	if (br == NULL)
++		return(NULL);
++	if (ret != NULL)
++		regtail(ret, br);	/* OPEN -> first. */
++	else
++		ret = br;
++	if (!(flags&HASWIDTH))
++		*flagp &= ~HASWIDTH;
++	*flagp |= flags&SPSTART;
++	while (*regparse == '|') {
++		regparse++;
++		br = regbranch(&flags);
++		if (br == NULL)
++			return(NULL);
++		regtail(ret, br);	/* BRANCH -> BRANCH. */
++		if (!(flags&HASWIDTH))
++			*flagp &= ~HASWIDTH;
++		*flagp |= flags&SPSTART;
++	}
++
++	/* Make a closing node, and hook it on the end. */
++	ender = regnode((paren) ? CLOSE+parno : END);	
++	regtail(ret, ender);
++
++	/* Hook the tails of the branches to the closing node. */
++	for (br = ret; br != NULL; br = regnext(br))
++		regoptail(br, ender);
++
++	/* Check for proper termination. */
++	if (paren && *regparse++ != ')') {
++		FAIL("unmatched ()");
++	} else if (!paren && *regparse != '\0') {
++		if (*regparse == ')') {
++			FAIL("unmatched ()");
++		} else
++			FAIL("junk on end");	/* "Can't happen". */
++		/* NOTREACHED */
++	}
++
++	return(ret);
++}
++
++/*
++ - regbranch - one alternative of an | operator
++ *
++ * Implements the concatenation operator.
++ */
++static char *
++regbranch(int *flagp)
++{
++	register char *ret;
++	register char *chain;
++	register char *latest;
++	int flags;
++
++	*flagp = WORST;		/* Tentatively. */
++
++	ret = regnode(BRANCH);
++	chain = NULL;
++	while (*regparse != '\0' && *regparse != '|' && *regparse != ')') {
++		latest = regpiece(&flags);
++		if (latest == NULL)
++			return(NULL);
++		*flagp |= flags&HASWIDTH;
++		if (chain == NULL)	/* First piece. */
++			*flagp |= flags&SPSTART;
++		else
++			regtail(chain, latest);
++		chain = latest;
++	}
++	if (chain == NULL)	/* Loop ran zero times. */
++		(void) regnode(NOTHING);
++
++	return(ret);
++}
++
++/*
++ - regpiece - something followed by possible [*+?]
++ *
++ * Note that the branching code sequences used for ? and the general cases
++ * of * and + are somewhat optimized:  they use the same NOTHING node as
++ * both the endmarker for their branch list and the body of the last branch.
++ * It might seem that this node could be dispensed with entirely, but the
++ * endmarker role is not redundant.
++ */
++static char *
++regpiece(int *flagp)
++{
++	register char *ret;
++	register char op;
++	register char *next;
++	int flags;
++
++	ret = regatom(&flags);
++	if (ret == NULL)
++		return(NULL);
++
++	op = *regparse;
++	if (!ISMULT(op)) {
++		*flagp = flags;
++		return(ret);
++	}
++
++	if (!(flags&HASWIDTH) && op != '?')
++		FAIL("*+ operand could be empty");
++	*flagp = (op != '+') ? (WORST|SPSTART) : (WORST|HASWIDTH);
++
++	if (op == '*' && (flags&SIMPLE))
++		reginsert(STAR, ret);
++	else if (op == '*') {
++		/* Emit x* as (x&|), where & means "self". */
++		reginsert(BRANCH, ret);			/* Either x */
++		regoptail(ret, regnode(BACK));		/* and loop */
++		regoptail(ret, ret);			/* back */
++		regtail(ret, regnode(BRANCH));		/* or */
++		regtail(ret, regnode(NOTHING));		/* null. */
++	} else if (op == '+' && (flags&SIMPLE))
++		reginsert(PLUS, ret);
++	else if (op == '+') {
++		/* Emit x+ as x(&|), where & means "self". */
++		next = regnode(BRANCH);			/* Either */
++		regtail(ret, next);
++		regtail(regnode(BACK), ret);		/* loop back */
++		regtail(next, regnode(BRANCH));		/* or */
++		regtail(ret, regnode(NOTHING));		/* null. */
++	} else if (op == '?') {
++		/* Emit x? as (x|) */
++		reginsert(BRANCH, ret);			/* Either x */
++		regtail(ret, regnode(BRANCH));		/* or */
++		next = regnode(NOTHING);		/* null. */
++		regtail(ret, next);
++		regoptail(ret, next);
++	}
++	regparse++;
++	if (ISMULT(*regparse))
++		FAIL("nested *?+");
++
++	return(ret);
++}
++
++/*
++ - regatom - the lowest level
++ *
++ * Optimization:  gobbles an entire sequence of ordinary characters so that
++ * it can turn them into a single node, which is smaller to store and
++ * faster to run.  Backslashed characters are exceptions, each becoming a
++ * separate node; the code is simpler that way and it's not worth fixing.
++ */
++static char *
++regatom(int *flagp)
++{
++	register char *ret;
++	int flags;
++
++	*flagp = WORST;		/* Tentatively. */
++
++	switch (*regparse++) {
++	case '^':
++		ret = regnode(BOL);
++		break;
++	case '$':
++		ret = regnode(EOL);
++		break;
++	case '.':
++		ret = regnode(ANY);
++		*flagp |= HASWIDTH|SIMPLE;
++		break;
++	case '[': {
++			register int class;
++			register int classend;
++
++			if (*regparse == '^') {	/* Complement of range. */
++				ret = regnode(ANYBUT);
++				regparse++;
++			} else
++				ret = regnode(ANYOF);
++			if (*regparse == ']' || *regparse == '-')
++				regc(*regparse++);
++			while (*regparse != '\0' && *regparse != ']') {
++				if (*regparse == '-') {
++					regparse++;
++					if (*regparse == ']' || *regparse == '\0')
++						regc('-');
++					else {
++						class = UCHARAT(regparse-2)+1;
++						classend = UCHARAT(regparse);
++						if (class > classend+1)
++							FAIL("invalid [] range");
++						for (; class <= classend; class++)
++							regc(class);
++						regparse++;
++					}
++				} else
++					regc(*regparse++);
++			}
++			regc('\0');
++			if (*regparse != ']')
++				FAIL("unmatched []");
++			regparse++;
++			*flagp |= HASWIDTH|SIMPLE;
++		}
++		break;
++	case '(':
++		ret = reg(1, &flags);
++		if (ret == NULL)
++			return(NULL);
++		*flagp |= flags&(HASWIDTH|SPSTART);
++		break;
++	case '\0':
++	case '|':
++	case ')':
++		FAIL("internal urp");	/* Supposed to be caught earlier. */
++		break;
++	case '?':
++	case '+':
++	case '*':
++		FAIL("?+* follows nothing");
++		break;
++	case '\\':
++		if (*regparse == '\0')
++			FAIL("trailing \\");
++		ret = regnode(EXACTLY);
++		regc(*regparse++);
++		regc('\0');
++		*flagp |= HASWIDTH|SIMPLE;
++		break;
++	default: {
++			register int len;
++			register char ender;
++
++			regparse--;
++			len = my_strcspn((const char *)regparse, (const char *)META);
++			if (len <= 0)
++				FAIL("internal disaster");
++			ender = *(regparse+len);
++			if (len > 1 && ISMULT(ender))
++				len--;		/* Back off clear of ?+* operand. */
++			*flagp |= HASWIDTH;
++			if (len == 1)
++				*flagp |= SIMPLE;
++			ret = regnode(EXACTLY);
++			while (len > 0) {
++				regc(*regparse++);
++				len--;
++			}
++			regc('\0');
++		}
++		break;
++	}
++
++	return(ret);
++}
++
++/*
++ - regnode - emit a node
++ */
++static char *			/* Location. */
++regnode(char op)
++{
++	register char *ret;
++	register char *ptr;
++
++	ret = regcode;
++	if (ret == &regdummy) {
++		regsize += 3;
++		return(ret);
++	}
++
++	ptr = ret;
++	*ptr++ = op;
++	*ptr++ = '\0';		/* Null "next" pointer. */
++	*ptr++ = '\0';
++	regcode = ptr;
++
++	return(ret);
++}
++
++/*
++ - regc - emit (if appropriate) a byte of code
++ */
++static void
++regc(char b)
++{
++	if (regcode != &regdummy)
++		*regcode++ = b;
++	else
++		regsize++;
++}
++
++/*
++ - reginsert - insert an operator in front of already-emitted operand
++ *
++ * Means relocating the operand.
++ */
++static void
++reginsert(char op, char* opnd)
++{
++	register char *src;
++	register char *dst;
++	register char *place;
++
++	if (regcode == &regdummy) {
++		regsize += 3;
++		return;
++	}
++
++	src = regcode;
++	regcode += 3;
++	dst = regcode;
++	while (src > opnd)
++		*--dst = *--src;
++
++	place = opnd;		/* Op node, where operand used to be. */
++	*place++ = op;
++	*place++ = '\0';
++	*place++ = '\0';
++}
++
++/*
++ - regtail - set the next-pointer at the end of a node chain
++ */
++static void
++regtail(char *p, char *val)
++{
++	register char *scan;
++	register char *temp;
++	register int offset;
++
++	if (p == &regdummy)
++		return;
++
++	/* Find last node. */
++	scan = p;
++	for (;;) {
++		temp = regnext(scan);
++		if (temp == NULL)
++			break;
++		scan = temp;
++	}
++
++	if (OP(scan) == BACK)
++		offset = scan - val;
++	else
++		offset = val - scan;
++	*(scan+1) = (offset>>8)&0377;
++	*(scan+2) = offset&0377;
++}
++
++/*
++ - regoptail - regtail on operand of first argument; nop if operandless
++ */
++static void
++regoptail(char *p, char *val)
++{
++	/* "Operandless" and "op != BRANCH" are synonymous in practice. */
++	if (p == NULL || p == &regdummy || OP(p) != BRANCH)
++		return;
++	regtail(OPERAND(p), val);
++}
++
++/*
++ * regexec and friends
++ */
++
++/*
++ * Global work variables for regexec().
++ */
++static char *reginput;		/* String-input pointer. */
++static char *regbol;		/* Beginning of input, for ^ check. */
++static char **regstartp;	/* Pointer to startp array. */
++static char **regendp;		/* Ditto for endp. */
++
++/*
++ * Forwards.
++ */
++STATIC int regtry(regexp *prog, char *string);
++STATIC int regmatch(char *prog);
++STATIC int regrepeat(char *p);
++
++#ifdef DEBUG
++int regnarrate = 0;
++void regdump();
++STATIC char *regprop(char *op);
++#endif
++
++/*
++ - regexec - match a regexp against a string
++ */
++int
++regexec(regexp *prog, char *string)
++{
++	register char *s;
++
++	/* Be paranoid... */
++	if (prog == NULL || string == NULL) {
++		printk("<3>Regexp: NULL parameter\n");
++		return(0);
++	}
++
++	/* Check validity of program. */
++	if (UCHARAT(prog->program) != MAGIC) {
++		printk("<3>Regexp: corrupted program\n");
++		return(0);
++	}
++
++	/* If there is a "must appear" string, look for it. */
++	if (prog->regmust != NULL) {
++		s = string;
++		while ((s = strchr(s, prog->regmust[0])) != NULL) {
++			if (strncmp(s, prog->regmust, prog->regmlen) == 0)
++				break;	/* Found it. */
++			s++;
++		}
++		if (s == NULL)	/* Not present. */
++			return(0);
++	}
++
++	/* Mark beginning of line for ^ . */
++	regbol = string;
++
++	/* Simplest case:  anchored match need be tried only once. */
++	if (prog->reganch)
++		return(regtry(prog, string));
++
++	/* Messy cases:  unanchored match. */
++	s = string;
++	if (prog->regstart != '\0')
++		/* We know what char it must start with. */
++		while ((s = strchr(s, prog->regstart)) != NULL) {
++			if (regtry(prog, s))
++				return(1);
++			s++;
++		}
++	else
++		/* We don't -- general case. */
++		do {
++			if (regtry(prog, s))
++				return(1);
++		} while (*s++ != '\0');
++
++	/* Failure. */
++	return(0);
++}
++
++/*
++ - regtry - try match at specific point
++ */
++static int			/* 0 failure, 1 success */
++regtry(regexp *prog, char *string)
++{
++	register int i;
++	register char **sp;
++	register char **ep;
++
++	reginput = string;
++	regstartp = prog->startp;
++	regendp = prog->endp;
++
++	sp = prog->startp;
++	ep = prog->endp;
++	for (i = NSUBEXP; i > 0; i--) {
++		*sp++ = NULL;
++		*ep++ = NULL;
++	}
++	if (regmatch(prog->program + 1)) {
++		prog->startp[0] = string;
++		prog->endp[0] = reginput;
++		return(1);
++	} else
++		return(0);
++}
++
++/*
++ - regmatch - main matching routine
++ *
++ * Conceptually the strategy is simple:  check to see whether the current
++ * node matches, call self recursively to see whether the rest matches,
++ * and then act accordingly.  In practice we make some effort to avoid
++ * recursion, in particular by going through "ordinary" nodes (that don't
++ * need to know whether the rest of the match failed) by a loop instead of
++ * by recursion.
++ */
++static int			/* 0 failure, 1 success */
++regmatch(char *prog)
++{
++	register char *scan = prog; /* Current node. */
++	char *next;		    /* Next node. */
++
++#ifdef DEBUG
++	if (scan != NULL && regnarrate)
++		fprintf(stderr, "%s(\n", regprop(scan));
++#endif
++	while (scan != NULL) {
++#ifdef DEBUG
++		if (regnarrate)
++			fprintf(stderr, "%s...\n", regprop(scan));
++#endif
++		next = regnext(scan);
++
++		switch (OP(scan)) {
++		case BOL:
++			if (reginput != regbol)
++				return(0);
++			break;
++		case EOL:
++			if (*reginput != '\0')
++				return(0);
++			break;
++		case ANY:
++			if (*reginput == '\0')
++				return(0);
++			reginput++;
++			break;
++		case EXACTLY: {
++				register int len;
++				register char *opnd;
++
++				opnd = OPERAND(scan);
++				/* Inline the first character, for speed. */
++				if (*opnd != *reginput)
++					return(0);
++				len = strlen(opnd);
++				if (len > 1 && strncmp(opnd, reginput, len) != 0)
++					return(0);
++				reginput += len;
++			}
++			break;
++		case ANYOF:
++			if (*reginput == '\0' || strchr(OPERAND(scan), *reginput) == NULL)
++				return(0);
++			reginput++;
++			break;
++		case ANYBUT:
++			if (*reginput == '\0' || strchr(OPERAND(scan), *reginput) != NULL)
++				return(0);
++			reginput++;
++			break;
++		case NOTHING:
++		case BACK:
++			break;
++		case OPEN+1:
++		case OPEN+2:
++		case OPEN+3:
++		case OPEN+4:
++		case OPEN+5:
++		case OPEN+6:
++		case OPEN+7:
++		case OPEN+8:
++		case OPEN+9: {
++				register int no;
++				register char *save;
++
++				no = OP(scan) - OPEN;
++				save = reginput;
++
++				if (regmatch(next)) {
++					/*
++					 * Don't set startp if some later
++					 * invocation of the same parentheses
++					 * already has.
++					 */
++					if (regstartp[no] == NULL)
++						regstartp[no] = save;
++					return(1);
++				} else
++					return(0);
++			}
++			break;
++		case CLOSE+1:
++		case CLOSE+2:
++		case CLOSE+3:
++		case CLOSE+4:
++		case CLOSE+5:
++		case CLOSE+6:
++		case CLOSE+7:
++		case CLOSE+8:
++		case CLOSE+9:
++			{
++				register int no;
++				register char *save;
++
++				no = OP(scan) - CLOSE;
++				save = reginput;
++
++				if (regmatch(next)) {
++					/*
++					 * Don't set endp if some later
++					 * invocation of the same parentheses
++					 * already has.
++					 */
++					if (regendp[no] == NULL)
++						regendp[no] = save;
++					return(1);
++				} else
++					return(0);
++			}
++			break;
++		case BRANCH: {
++				register char *save;
++
++				if (OP(next) != BRANCH)		/* No choice. */
++					next = OPERAND(scan);	/* Avoid recursion. */
++				else {
++					do {
++						save = reginput;
++						if (regmatch(OPERAND(scan)))
++							return(1);
++						reginput = save;
++						scan = regnext(scan);
++					} while (scan != NULL && OP(scan) == BRANCH);
++					return(0);
++					/* NOTREACHED */
++				}
++			}
++			break;
++		case STAR:
++		case PLUS: {
++				register char nextch;
++				register int no;
++				register char *save;
++				register int min;
++
++				/*
++				 * Lookahead to avoid useless match attempts
++				 * when we know what character comes next.
++				 */
++				nextch = '\0';
++				if (OP(next) == EXACTLY)
++					nextch = *OPERAND(next);
++				min = (OP(scan) == STAR) ? 0 : 1;
++				save = reginput;
++				no = regrepeat(OPERAND(scan));
++				while (no >= min) {
++					/* If it could work, try it. */
++					if (nextch == '\0' || *reginput == nextch)
++						if (regmatch(next))
++							return(1);
++					/* Couldn't or didn't -- back up. */
++					no--;
++					reginput = save + no;
++				}
++				return(0);
++			}
++			break;
++		case END:
++			return(1);	/* Success! */
++			break;
++		default:
++			printk("<3>Regexp: memory corruption\n");
++			return(0);
++			break;
++		}
++
++		scan = next;
++	}
++
++	/*
++	 * We get here only if there's trouble -- normally "case END" is
++	 * the terminating point.
++	 */
++	printk("<3>Regexp: corrupted pointers\n");
++	return(0);
++}
++
++/*
++ - regrepeat - repeatedly match something simple, report how many
++ */
++static int
++regrepeat(char *p)
++{
++	register int count = 0;
++	register char *scan;
++	register char *opnd;
++
++	scan = reginput;
++	opnd = OPERAND(p);
++	switch (OP(p)) {
++	case ANY:
++		count = strlen(scan);
++		scan += count;
++		break;
++	case EXACTLY:
++		while (*opnd == *scan) {
++			count++;
++			scan++;
++		}
++		break;
++	case ANYOF:
++		while (*scan != '\0' && strchr(opnd, *scan) != NULL) {
++			count++;
++			scan++;
++		}
++		break;
++	case ANYBUT:
++		while (*scan != '\0' && strchr(opnd, *scan) == NULL) {
++			count++;
++			scan++;
++		}
++		break;
++	default:		/* Oh dear.  Called inappropriately. */
++		printk("<3>Regexp: internal foulup\n");
++		count = 0;	/* Best compromise. */
++		break;
++	}
++	reginput = scan;
++
++	return(count);
++}
++
++/*
++ - regnext - dig the "next" pointer out of a node
++ */
++static char* 
++regnext(char *p)
++{
++	register int offset;
++
++	if (p == &regdummy)
++		return(NULL);
++
++	offset = NEXT(p);
++	if (offset == 0)
++		return(NULL);
++
++	if (OP(p) == BACK)
++		return(p-offset);
++	else
++		return(p+offset);
++}
++
++#ifdef DEBUG
++
++STATIC char *regprop();
++
++/*
++ - regdump - dump a regexp onto stdout in vaguely comprehensible form
++ */
++void
++regdump(regexp *r)
++{
++	register char *s;
++	register char op = EXACTLY;	/* Arbitrary non-END op. */
++	register char *next;
++	/* extern char *strchr(); */
++
++
++	s = r->program + 1;
++	while (op != END) {	/* While that wasn't END last time... */
++		op = OP(s);
++		printf("%2d%s", s-r->program, regprop(s));	/* Where, what. */
++		next = regnext(s);
++		if (next == NULL)		/* Next ptr. */
++			printf("(0)");
++		else 
++			printf("(%d)", (s-r->program)+(next-s));
++		s += 3;
++		if (op == ANYOF || op == ANYBUT || op == EXACTLY) {
++			/* Literal string, where present. */
++			while (*s != '\0') {
++				putchar(*s);
++				s++;
++			}
++			s++;
++		}
++		putchar('\n');
++	}
++
++	/* Header fields of interest. */
++	if (r->regstart != '\0')
++		printf("start `%c' ", r->regstart);
++	if (r->reganch)
++		printf("anchored ");
++	if (r->regmust != NULL)
++		printf("must have \"%s\"", r->regmust);
++	printf("\n");
++}
++
++/*
++ - regprop - printable representation of opcode
++ */
++static char *
++regprop(char *op)
++{
++#define BUFLEN 50
++	register char *p;
++	static char buf[BUFLEN];
++
++	strcpy(buf, ":");
++
++	switch (OP(op)) {
++	case BOL:
++		p = "BOL";
++		break;
++	case EOL:
++		p = "EOL";
++		break;
++	case ANY:
++		p = "ANY";
++		break;
++	case ANYOF:
++		p = "ANYOF";
++		break;
++	case ANYBUT:
++		p = "ANYBUT";
++		break;
++	case BRANCH:
++		p = "BRANCH";
++		break;
++	case EXACTLY:
++		p = "EXACTLY";
++		break;
++	case NOTHING:
++		p = "NOTHING";
++		break;
++	case BACK:
++		p = "BACK";
++		break;
++	case END:
++		p = "END";
++		break;
++	case OPEN+1:
++	case OPEN+2:
++	case OPEN+3:
++	case OPEN+4:
++	case OPEN+5:
++	case OPEN+6:
++	case OPEN+7:
++	case OPEN+8:
++	case OPEN+9:
++		snprintf(buf+strlen(buf),BUFLEN-strlen(buf), "OPEN%d", OP(op)-OPEN);
++		p = NULL;
++		break;
++	case CLOSE+1:
++	case CLOSE+2:
++	case CLOSE+3:
++	case CLOSE+4:
++	case CLOSE+5:
++	case CLOSE+6:
++	case CLOSE+7:
++	case CLOSE+8:
++	case CLOSE+9:
++		snprintf(buf+strlen(buf),BUFLEN-strlen(buf), "CLOSE%d", OP(op)-CLOSE);
++		p = NULL;
++		break;
++	case STAR:
++		p = "STAR";
++		break;
++	case PLUS:
++		p = "PLUS";
++		break;
++	default:
++		printk("<3>Regexp: corrupted opcode\n");
++		break;
++	}
++	if (p != NULL)
++		strncat(buf, p, BUFLEN-strlen(buf));
++	return(buf);
++}
++#endif
++
++
+diff -Nurp linux-2.4.30/net/ipv4/netfilter/regexp/regexp.h linux-2.4.30-layer7/net/ipv4/netfilter/regexp/regexp.h
+--- linux-2.4.30/net/ipv4/netfilter/regexp/regexp.h	1969-12-31 18:00:00.000000000 -0600
++++ linux-2.4.30-layer7/net/ipv4/netfilter/regexp/regexp.h	2005-05-03 18:37:03.000000000 -0500
+@@ -0,0 +1,40 @@
++/*
++ * Definitions etc. for regexp(3) routines.
++ *
++ * Caveat:  this is V8 regexp(3) [actually, a reimplementation thereof],
++ * not the System V one.
++ */
++
++#ifndef REGEXP_H
++#define REGEXP_H
++
++/* 
++http://www.opensource.apple.com/darwinsource/10.3/expect-1/expect/expect.h , 
++which contains a version of this library, says:
++
++ *
++ * NSUBEXP must be at least 10, and no greater than 117 or the parser
++ * will not work properly.
++ *
++
++However, it looks rather like this library is limited to 10.  If you think
++otherwise, let us know.
++*/
++
++#define NSUBEXP  10
++typedef struct regexp {
++	char *startp[NSUBEXP];
++	char *endp[NSUBEXP];
++	char regstart;		/* Internal use only. */
++	char reganch;		/* Internal use only. */
++	char *regmust;		/* Internal use only. */
++	int regmlen;		/* Internal use only. */
++	char program[1];	/* Unwarranted chumminess with compiler. */
++} regexp;
++
++regexp * regcomp(char *exp, int *patternsize);
++int regexec(regexp *prog, char *string);
++void regsub(regexp *prog, char *source, char *dest);
++void regerror(char *s);
++
++#endif
+diff -Nurp linux-2.4.30/net/ipv4/netfilter/regexp/regmagic.h linux-2.4.30-layer7/net/ipv4/netfilter/regexp/regmagic.h
+--- linux-2.4.30/net/ipv4/netfilter/regexp/regmagic.h	1969-12-31 18:00:00.000000000 -0600
++++ linux-2.4.30-layer7/net/ipv4/netfilter/regexp/regmagic.h	2005-05-03 18:37:03.000000000 -0500
+@@ -0,0 +1,5 @@
++/*
++ * The first byte of the regexp internal "program" is actually this magic
++ * number; the start node begins in the second byte.
++ */
++#define	MAGIC	0234
+diff -Nurp linux-2.4.30/net/ipv4/netfilter/regexp/regsub.c linux-2.4.30-layer7/net/ipv4/netfilter/regexp/regsub.c
+--- linux-2.4.30/net/ipv4/netfilter/regexp/regsub.c	1969-12-31 18:00:00.000000000 -0600
++++ linux-2.4.30-layer7/net/ipv4/netfilter/regexp/regsub.c	2005-05-03 18:37:03.000000000 -0500
+@@ -0,0 +1,95 @@
++/*
++ * regsub
++ * @(#)regsub.c	1.3 of 2 April 86
++ *
++ *	Copyright (c) 1986 by University of Toronto.
++ *	Written by Henry Spencer.  Not derived from licensed software.
++ *
++ *	Permission is granted to anyone to use this software for any
++ *	purpose on any computer system, and to redistribute it freely,
++ *	subject to the following restrictions:
++ *
++ *	1. The author is not responsible for the consequences of use of
++ *		this software, no matter how awful, even if they arise
++ *		from defects in it.
++ *
++ *	2. The origin of this software must not be misrepresented, either
++ *		by explicit claim or by omission.
++ *
++ *	3. Altered versions must be plainly marked as such, and must not
++ *		be misrepresented as being the original software.
++ *
++ *
++ * This code was modified by Ethan Sommer to work within the kernel
++ * (it now uses kmalloc etc..)
++ *
++ */
++#include "regexp.h"
++#include "regmagic.h"
++#include <linux/string.h>
++
++
++#ifndef CHARBITS
++#define	UCHARAT(p)	((int)*(unsigned char *)(p))
++#else
++#define	UCHARAT(p)	((int)*(p)&CHARBITS)
++#endif
++
++#if 0
++//void regerror(char * s)
++//{
++//        printk("regexp(3): %s", s);
++//        /* NOTREACHED */
++//}
++#endif
++
++/*
++ - regsub - perform substitutions after a regexp match
++ */
++void
++regsub(regexp * prog, char * source, char * dest)
++{
++	register char *src;
++	register char *dst;
++	register char c;
++	register int no;
++	register int len;
++	
++	/* Not necessary and gcc doesn't like it -MLS */
++	/*extern char *strncpy();*/
++
++	if (prog == NULL || source == NULL || dest == NULL) {
++		regerror("NULL parm to regsub");
++		return;
++	}
++	if (UCHARAT(prog->program) != MAGIC) {
++		regerror("damaged regexp fed to regsub");
++		return;
++	}
++
++	src = source;
++	dst = dest;
++	while ((c = *src++) != '\0') {
++		if (c == '&')
++			no = 0;
++		else if (c == '\\' && '0' <= *src && *src <= '9')
++			no = *src++ - '0';
++		else
++			no = -1;
++
++		if (no < 0) {	/* Ordinary character. */
++			if (c == '\\' && (*src == '\\' || *src == '&'))
++				c = *src++;
++			*dst++ = c;
++		} else if (prog->startp[no] != NULL && prog->endp[no] != NULL) {
++			len = prog->endp[no] - prog->startp[no];
++			(void) strncpy(dst, prog->startp[no], len);
++			dst += len;
++			if (len != 0 && *(dst-1) == '\0') {	/* strncpy hit NUL. */
++				regerror("damaged match string");
++				return;
++			}
++		}
++	}
++	*dst++ = '\0';
++}
diff --git a/openwrt/target/linux/linux-2.4/patches/generic/603-netfilter_nat_pptp.patch b/openwrt/target/linux/linux-2.4/patches/generic/603-netfilter_nat_pptp.patch
new file mode 100644
index 0000000000..6c7d6e6f21
--- /dev/null
+++ b/openwrt/target/linux/linux-2.4/patches/generic/603-netfilter_nat_pptp.patch
@@ -0,0 +1,2412 @@
+diff -urN linux-2.4.29-old/include/linux/netfilter_ipv4/ip_conntrack.h linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_conntrack.h
+--- linux-2.4.29-old/include/linux/netfilter_ipv4/ip_conntrack.h	2005-04-02 19:04:11.000000000 +0200
++++ linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_conntrack.h	2005-04-02 19:41:05.000000000 +0200
+@@ -50,16 +50,19 @@
+ 
+ #include <linux/netfilter_ipv4/ip_conntrack_tcp.h>
+ #include <linux/netfilter_ipv4/ip_conntrack_icmp.h>
++#include <linux/netfilter_ipv4/ip_conntrack_proto_gre.h>
+ 
+ /* per conntrack: protocol private data */
+ union ip_conntrack_proto {
+ 	/* insert conntrack proto private data here */
+ 	struct ip_ct_tcp tcp;
+ 	struct ip_ct_icmp icmp;
++	struct ip_ct_gre gre;
+ };
+ 
+ union ip_conntrack_expect_proto {
+ 	/* insert expect proto private data here */
++	struct ip_ct_gre_expect gre;
+ };
+ 
+ /* Add protocol helper include file here */
+@@ -67,6 +70,7 @@
+ 
+ #include <linux/netfilter_ipv4/ip_conntrack_ftp.h>
+ #include <linux/netfilter_ipv4/ip_conntrack_irc.h>
++#include <linux/netfilter_ipv4/ip_conntrack_pptp.h>
+ 
+ /* per expectation: application helper private data */
+ union ip_conntrack_expect_help {
+@@ -74,6 +78,7 @@
+ 	struct ip_ct_amanda_expect exp_amanda_info;
+ 	struct ip_ct_ftp_expect exp_ftp_info;
+ 	struct ip_ct_irc_expect exp_irc_info;
++	struct ip_ct_pptp_expect exp_pptp_info;
+ 
+ #ifdef CONFIG_IP_NF_NAT_NEEDED
+ 	union {
+@@ -87,14 +92,17 @@
+ 	/* insert conntrack helper private data (master) here */
+ 	struct ip_ct_ftp_master ct_ftp_info;
+ 	struct ip_ct_irc_master ct_irc_info;
++	struct ip_ct_pptp_master ct_pptp_info;
+ };
+ 
+ #ifdef CONFIG_IP_NF_NAT_NEEDED
+ #include <linux/netfilter_ipv4/ip_nat.h>
++#include <linux/netfilter_ipv4/ip_nat_pptp.h>
+ 
+ /* per conntrack: nat application helper private data */
+ union ip_conntrack_nat_help {
+ 	/* insert nat helper private data here */
++	struct ip_nat_pptp nat_pptp_info;
+ };
+ #endif
+ 
+diff -urN linux-2.4.29-old/include/linux/netfilter_ipv4/ip_conntrack_pptp.h linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_conntrack_pptp.h
+--- linux-2.4.29-old/include/linux/netfilter_ipv4/ip_conntrack_pptp.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_conntrack_pptp.h	2005-04-02 19:09:07.000000000 +0200
+@@ -0,0 +1,313 @@
++/* PPTP constants and structs */
++#ifndef _CONNTRACK_PPTP_H
++#define _CONNTRACK_PPTP_H
++
++/* state of the control session */
++enum pptp_ctrlsess_state {
++	PPTP_SESSION_NONE,			/* no session present */
++	PPTP_SESSION_ERROR,			/* some session error */
++	PPTP_SESSION_STOPREQ,			/* stop_sess request seen */
++	PPTP_SESSION_REQUESTED,			/* start_sess request seen */
++	PPTP_SESSION_CONFIRMED,			/* session established */
++};
++
++/* state of the call inside the control session */
++enum pptp_ctrlcall_state {
++	PPTP_CALL_NONE,
++	PPTP_CALL_ERROR,
++	PPTP_CALL_OUT_REQ,
++	PPTP_CALL_OUT_CONF,
++	PPTP_CALL_IN_REQ,
++	PPTP_CALL_IN_REP,
++	PPTP_CALL_IN_CONF,
++	PPTP_CALL_CLEAR_REQ,
++};
++
++
++/* conntrack private data */
++struct ip_ct_pptp_master {
++	enum pptp_ctrlsess_state sstate;	/* session state */
++
++	/* everything below is going to be per-expectation in newnat,
++	 * since there could be more than one call within one session */
++	enum pptp_ctrlcall_state cstate;	/* call state */
++	u_int16_t pac_call_id;			/* call id of PAC, host byte order */
++	u_int16_t pns_call_id;			/* call id of PNS, host byte order */
++};
++
++/* conntrack_expect private member */
++struct ip_ct_pptp_expect {
++	enum pptp_ctrlcall_state cstate; 	/* call state */
++	u_int16_t pac_call_id;			/* call id of PAC */
++	u_int16_t pns_call_id;			/* call id of PNS */
++};
++
++
++#ifdef __KERNEL__
++
++#include <linux/netfilter_ipv4/lockhelp.h>
++DECLARE_LOCK_EXTERN(ip_pptp_lock);
++
++#define IP_CONNTR_PPTP		PPTP_CONTROL_PORT
++
++union pptp_ctrl_union {
++                void				*rawreq;
++		struct PptpStartSessionRequest	*sreq;
++		struct PptpStartSessionReply	*srep;
++		struct PptpStopSessionRequest	*streq;
++		struct PptpStopSessionReply	*strep;
++                struct PptpOutCallRequest       *ocreq;
++                struct PptpOutCallReply         *ocack;
++                struct PptpInCallRequest        *icreq;
++                struct PptpInCallReply          *icack;
++                struct PptpInCallConnected      *iccon;
++		struct PptpClearCallRequest	*clrreq;
++                struct PptpCallDisconnectNotify *disc;
++                struct PptpWanErrorNotify       *wanerr;
++                struct PptpSetLinkInfo          *setlink;
++};
++
++
++
++#define PPTP_CONTROL_PORT	1723
++
++#define PPTP_PACKET_CONTROL	1
++#define PPTP_PACKET_MGMT	2
++
++#define PPTP_MAGIC_COOKIE	0x1a2b3c4d
++
++struct pptp_pkt_hdr {
++	__u16	packetLength;
++	__u16	packetType;
++	__u32	magicCookie;
++};
++
++/* PptpControlMessageType values */
++#define PPTP_START_SESSION_REQUEST	1
++#define PPTP_START_SESSION_REPLY	2
++#define PPTP_STOP_SESSION_REQUEST	3
++#define PPTP_STOP_SESSION_REPLY		4
++#define PPTP_ECHO_REQUEST		5
++#define PPTP_ECHO_REPLY			6
++#define PPTP_OUT_CALL_REQUEST		7
++#define PPTP_OUT_CALL_REPLY		8
++#define PPTP_IN_CALL_REQUEST		9
++#define PPTP_IN_CALL_REPLY		10
++#define PPTP_IN_CALL_CONNECT		11
++#define PPTP_CALL_CLEAR_REQUEST		12
++#define PPTP_CALL_DISCONNECT_NOTIFY	13
++#define PPTP_WAN_ERROR_NOTIFY		14
++#define PPTP_SET_LINK_INFO		15
++
++#define PPTP_MSG_MAX			15
++
++/* PptpGeneralError values */
++#define PPTP_ERROR_CODE_NONE		0
++#define PPTP_NOT_CONNECTED		1
++#define PPTP_BAD_FORMAT			2
++#define PPTP_BAD_VALUE			3
++#define PPTP_NO_RESOURCE		4
++#define PPTP_BAD_CALLID			5
++#define PPTP_REMOVE_DEVICE_ERROR	6
++
++struct PptpControlHeader {
++	__u16	messageType;
++	__u16	reserved;
++};
++
++/* FramingCapability Bitmap Values */
++#define PPTP_FRAME_CAP_ASYNC		0x1
++#define PPTP_FRAME_CAP_SYNC		0x2
++
++/* BearerCapability Bitmap Values */
++#define PPTP_BEARER_CAP_ANALOG		0x1
++#define PPTP_BEARER_CAP_DIGITAL		0x2
++
++struct PptpStartSessionRequest {
++	__u16	protocolVersion;
++	__u8	reserved1;
++	__u8	reserved2;
++	__u32	framingCapability;
++	__u32	bearerCapability;
++	__u16	maxChannels;
++	__u16	firmwareRevision;
++	__u8	hostName[64];
++	__u8	vendorString[64];
++};
++
++/* PptpStartSessionResultCode Values */
++#define PPTP_START_OK			1
++#define PPTP_START_GENERAL_ERROR	2
++#define PPTP_START_ALREADY_CONNECTED	3
++#define PPTP_START_NOT_AUTHORIZED	4
++#define PPTP_START_UNKNOWN_PROTOCOL	5
++
++struct PptpStartSessionReply {
++	__u16	protocolVersion;
++	__u8	resultCode;
++	__u8	generalErrorCode;
++	__u32	framingCapability;
++	__u32	bearerCapability;
++	__u16	maxChannels;
++	__u16	firmwareRevision;
++	__u8	hostName[64];
++	__u8	vendorString[64];
++};
++
++/* PptpStopReasons */
++#define PPTP_STOP_NONE			1
++#define PPTP_STOP_PROTOCOL		2
++#define PPTP_STOP_LOCAL_SHUTDOWN	3
++
++struct PptpStopSessionRequest {
++	__u8	reason;
++};
++
++/* PptpStopSessionResultCode */
++#define PPTP_STOP_OK			1
++#define PPTP_STOP_GENERAL_ERROR		2
++
++struct PptpStopSessionReply {
++	__u8	resultCode;
++	__u8	generalErrorCode;
++};
++
++struct PptpEchoRequest {
++	__u32 identNumber;
++};
++
++/* PptpEchoReplyResultCode */
++#define PPTP_ECHO_OK			1
++#define PPTP_ECHO_GENERAL_ERROR		2
++
++struct PptpEchoReply {
++	__u32	identNumber;
++	__u8	resultCode;
++	__u8	generalErrorCode;
++	__u16	reserved;
++};
++
++/* PptpFramingType */
++#define PPTP_ASYNC_FRAMING		1
++#define PPTP_SYNC_FRAMING		2
++#define PPTP_DONT_CARE_FRAMING		3
++
++/* PptpCallBearerType */
++#define PPTP_ANALOG_TYPE		1
++#define PPTP_DIGITAL_TYPE		2
++#define PPTP_DONT_CARE_BEARER_TYPE	3
++
++struct PptpOutCallRequest {
++	__u16	callID;
++	__u16	callSerialNumber;
++	__u32	minBPS;
++	__u32	maxBPS;
++	__u32	bearerType;
++	__u32	framingType;
++	__u16	packetWindow;
++	__u16	packetProcDelay;
++	__u16	reserved1;
++	__u16	phoneNumberLength;
++	__u16	reserved2;
++	__u8	phoneNumber[64];
++	__u8	subAddress[64];
++};
++
++/* PptpCallResultCode */
++#define PPTP_OUTCALL_CONNECT		1
++#define PPTP_OUTCALL_GENERAL_ERROR	2
++#define PPTP_OUTCALL_NO_CARRIER		3
++#define PPTP_OUTCALL_BUSY		4
++#define PPTP_OUTCALL_NO_DIAL_TONE	5
++#define PPTP_OUTCALL_TIMEOUT		6
++#define PPTP_OUTCALL_DONT_ACCEPT	7
++
++struct PptpOutCallReply {
++	__u16	callID;
++	__u16	peersCallID;
++	__u8	resultCode;
++	__u8	generalErrorCode;
++	__u16	causeCode;
++	__u32	connectSpeed;
++	__u16	packetWindow;
++	__u16	packetProcDelay;
++	__u32	physChannelID;
++};
++
++struct PptpInCallRequest {
++	__u16	callID;
++	__u16	callSerialNumber;
++	__u32	callBearerType;
++	__u32	physChannelID;
++	__u16	dialedNumberLength;
++	__u16	dialingNumberLength;
++	__u8	dialedNumber[64];
++	__u8	dialingNumber[64];
++	__u8	subAddress[64];
++};
++
++/* PptpInCallResultCode */
++#define PPTP_INCALL_ACCEPT		1
++#define PPTP_INCALL_GENERAL_ERROR	2
++#define PPTP_INCALL_DONT_ACCEPT		3
++
++struct PptpInCallReply {
++	__u16	callID;
++	__u16	peersCallID;
++	__u8	resultCode;
++	__u8	generalErrorCode;
++	__u16	packetWindow;
++	__u16	packetProcDelay;
++	__u16	reserved;
++};
++
++struct PptpInCallConnected {
++	__u16	peersCallID;
++	__u16	reserved;
++	__u32	connectSpeed;
++	__u16	packetWindow;
++	__u16	packetProcDelay;
++	__u32	callFramingType;
++};
++
++struct PptpClearCallRequest {
++	__u16	callID;
++	__u16	reserved;
++};
++
++struct PptpCallDisconnectNotify {
++	__u16	callID;
++	__u8	resultCode;
++	__u8	generalErrorCode;
++	__u16	causeCode;
++	__u16	reserved;
++	__u8	callStatistics[128];
++};
++
++struct PptpWanErrorNotify {
++	__u16	peersCallID;
++	__u16	reserved;
++	__u32	crcErrors;
++	__u32	framingErrors;
++	__u32	hardwareOverRuns;
++	__u32	bufferOverRuns;
++	__u32	timeoutErrors;
++	__u32	alignmentErrors;
++};
++
++struct PptpSetLinkInfo {
++	__u16	peersCallID;
++	__u16	reserved;
++	__u32	sendAccm;
++	__u32	recvAccm;
++};
++
++
++struct pptp_priv_data {
++	__u16	call_id;
++	__u16	mcall_id;
++	__u16	pcall_id;
++};
++
++#endif /* __KERNEL__ */
++#endif /* _CONNTRACK_PPTP_H */
+diff -urN linux-2.4.29-old/include/linux/netfilter_ipv4/ip_conntrack_proto_gre.h linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_conntrack_proto_gre.h
+--- linux-2.4.29-old/include/linux/netfilter_ipv4/ip_conntrack_proto_gre.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_conntrack_proto_gre.h	2005-04-02 19:10:45.000000000 +0200
+@@ -0,0 +1,123 @@
++#ifndef _CONNTRACK_PROTO_GRE_H
++#define _CONNTRACK_PROTO_GRE_H
++#include <asm/byteorder.h>
++
++/* GRE PROTOCOL HEADER */
++
++/* GRE Version field */
++#define GRE_VERSION_1701	0x0
++#define GRE_VERSION_PPTP	0x1
++
++/* GRE Protocol field */
++#define GRE_PROTOCOL_PPTP	0x880B
++
++/* GRE Flags */
++#define GRE_FLAG_C		0x80
++#define GRE_FLAG_R		0x40
++#define GRE_FLAG_K		0x20
++#define GRE_FLAG_S		0x10
++#define GRE_FLAG_A		0x80
++
++#define GRE_IS_C(f)	((f)&GRE_FLAG_C)
++#define GRE_IS_R(f)	((f)&GRE_FLAG_R)
++#define GRE_IS_K(f)	((f)&GRE_FLAG_K)
++#define GRE_IS_S(f)	((f)&GRE_FLAG_S)
++#define GRE_IS_A(f)	((f)&GRE_FLAG_A)
++
++/* GRE is a mess: Four different standards */
++struct gre_hdr {
++#if defined(__LITTLE_ENDIAN_BITFIELD)
++	__u16	rec:3,
++		srr:1,
++		seq:1,
++		key:1,
++		routing:1,
++		csum:1,
++		version:3,
++		reserved:4,
++		ack:1;
++#elif defined(__BIG_ENDIAN_BITFIELD)
++	__u16	csum:1,
++		routing:1,
++		key:1,
++		seq:1,
++		srr:1,
++		rec:3,
++		ack:1,
++		reserved:4,
++		version:3;
++#else
++#error "Adjust your <asm/byteorder.h> defines"
++#endif
++	__u16	protocol;
++};
++
++/* modified GRE header for PPTP */
++struct gre_hdr_pptp {
++	__u8  flags;		/* bitfield */
++	__u8  version;		/* should be GRE_VERSION_PPTP */
++	__u16 protocol;		/* should be GRE_PROTOCOL_PPTP */
++	__u16 payload_len;	/* size of ppp payload, not inc. gre header */
++	__u16 call_id;		/* peer's call_id for this session */
++	__u32 seq;		/* sequence number.  Present if S==1 */
++	__u32 ack;		/* seq number of highest packet recieved by */
++				/*  sender in this session */
++};
++
++
++/* this is part of ip_conntrack */
++struct ip_ct_gre {
++	unsigned int stream_timeout;
++	unsigned int timeout;
++};
++
++/* this is part of ip_conntrack_expect */
++struct ip_ct_gre_expect {
++	struct ip_ct_gre_keymap *keymap_orig, *keymap_reply;
++};
++
++#ifdef __KERNEL__
++struct ip_conntrack_expect;
++
++/* structure for original <-> reply keymap */
++struct ip_ct_gre_keymap {
++	struct list_head list;
++
++	struct ip_conntrack_tuple tuple;
++};
++
++
++/* add new tuple->key_reply pair to keymap */
++int ip_ct_gre_keymap_add(struct ip_conntrack_expect *exp,
++			 struct ip_conntrack_tuple *t,
++			 int reply);
++
++/* change an existing keymap entry */
++void ip_ct_gre_keymap_change(struct ip_ct_gre_keymap *km,
++			     struct ip_conntrack_tuple *t);
++
++/* delete keymap entries */
++void ip_ct_gre_keymap_destroy(struct ip_conntrack_expect *exp);
++
++
++/* get pointer to gre key, if present */
++static inline u_int32_t *gre_key(struct gre_hdr *greh)
++{
++	if (!greh->key)
++		return NULL;
++	if (greh->csum || greh->routing)
++		return (u_int32_t *) (greh+sizeof(*greh)+4);
++	return (u_int32_t *) (greh+sizeof(*greh));
++}
++
++/* get pointer ot gre csum, if present */
++static inline u_int16_t *gre_csum(struct gre_hdr *greh)
++{
++	if (!greh->csum)
++		return NULL;
++	return (u_int16_t *) (greh+sizeof(*greh));
++}
++
++#endif /* __KERNEL__ */
++
++#endif /* _CONNTRACK_PROTO_GRE_H */
+diff -urN linux-2.4.29-old/include/linux/netfilter_ipv4/ip_conntrack_tuple.h linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_conntrack_tuple.h
+--- linux-2.4.29-old/include/linux/netfilter_ipv4/ip_conntrack_tuple.h	2003-11-28 19:26:21.000000000 +0100
++++ linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_conntrack_tuple.h	2005-04-02 19:07:18.000000000 +0200
+@@ -14,7 +14,7 @@
+ union ip_conntrack_manip_proto
+ {
+ 	/* Add other protocols here. */
+-	u_int16_t all;
++	u_int32_t all;
+ 
+ 	struct {
+ 		u_int16_t port;
+@@ -25,6 +25,9 @@
+ 	struct {
+ 		u_int16_t id;
+ 	} icmp;
++	struct {
++		u_int32_t key;
++	} gre;
+ };
+ 
+ /* The manipulable part of the tuple. */
+@@ -44,7 +47,7 @@
+ 		u_int32_t ip;
+ 		union {
+ 			/* Add other protocols here. */
+-			u_int16_t all;
++			u_int32_t all;
+ 
+ 			struct {
+ 				u_int16_t port;
+@@ -55,6 +58,9 @@
+ 			struct {
+ 				u_int8_t type, code;
+ 			} icmp;
++			struct {
++				u_int32_t key;
++			} gre;
+ 		} u;
+ 
+ 		/* The protocol. */
+@@ -80,10 +86,16 @@
+ #ifdef __KERNEL__
+ 
+ #define DUMP_TUPLE(tp)						\
+-DEBUGP("tuple %p: %u %u.%u.%u.%u:%hu -> %u.%u.%u.%u:%hu\n",	\
++DEBUGP("tuple %p: %u %u.%u.%u.%u:%u -> %u.%u.%u.%u:%u\n",	\
+        (tp), (tp)->dst.protonum,				\
+-       NIPQUAD((tp)->src.ip), ntohs((tp)->src.u.all),		\
+-       NIPQUAD((tp)->dst.ip), ntohs((tp)->dst.u.all))
++       NIPQUAD((tp)->src.ip), ntohl((tp)->src.u.all),		\
++       NIPQUAD((tp)->dst.ip), ntohl((tp)->dst.u.all))
++
++#define DUMP_TUPLE_RAW(x) 						\
++	DEBUGP("tuple %p: %u %u.%u.%u.%u:0x%08x -> %u.%u.%u.%u:0x%08x\n",\
++	(x), (x)->dst.protonum,						\
++	NIPQUAD((x)->src.ip), ntohl((x)->src.u.all), 			\
++	NIPQUAD((x)->dst.ip), ntohl((x)->dst.u.all))
+ 
+ #define CTINFO2DIR(ctinfo) ((ctinfo) >= IP_CT_IS_REPLY ? IP_CT_DIR_REPLY : IP_CT_DIR_ORIGINAL)
+ 
+diff -urN linux-2.4.29-old/include/linux/netfilter_ipv4/ip_nat_pptp.h linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_nat_pptp.h
+--- linux-2.4.29-old/include/linux/netfilter_ipv4/ip_nat_pptp.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29-dev/include/linux/netfilter_ipv4/ip_nat_pptp.h	2005-04-02 19:07:18.000000000 +0200
+@@ -0,0 +1,11 @@
++/* PPTP constants and structs */
++#ifndef _NAT_PPTP_H
++#define _NAT_PPTP_H
++
++/* conntrack private data */
++struct ip_nat_pptp {
++	u_int16_t pns_call_id;		/* NAT'ed PNS call id */
++	u_int16_t pac_call_id;		/* NAT'ed PAC call id */
++};
++
++#endif /* _NAT_PPTP_H */
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/Config.in linux-2.4.29-dev/net/ipv4/netfilter/Config.in
+--- linux-2.4.29-old/net/ipv4/netfilter/Config.in	2005-04-02 19:04:11.000000000 +0200
++++ linux-2.4.29-dev/net/ipv4/netfilter/Config.in	2005-04-02 19:07:18.000000000 +0200
+@@ -10,6 +10,8 @@
+   dep_tristate '  Amanda protocol support' CONFIG_IP_NF_AMANDA $CONFIG_IP_NF_CONNTRACK
+   dep_tristate '  TFTP protocol support' CONFIG_IP_NF_TFTP $CONFIG_IP_NF_CONNTRACK
+   dep_tristate '  IRC protocol support' CONFIG_IP_NF_IRC $CONFIG_IP_NF_CONNTRACK
++  dep_tristate '  GRE protocol support' CONFIG_IP_NF_CT_PROTO_GRE $CONFIG_IP_NF_CONNTRACK
++  dep_tristate '   PPTP protocol support' CONFIG_IP_NF_PPTP $CONFIG_IP_NF_CT_PROTO_GRE
+ fi
+ 
+ if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+@@ -67,6 +69,20 @@
+       define_bool CONFIG_IP_NF_NAT_NEEDED y
+       dep_tristate '    MASQUERADE target support' CONFIG_IP_NF_TARGET_MASQUERADE $CONFIG_IP_NF_NAT
+       dep_tristate '    REDIRECT target support' CONFIG_IP_NF_TARGET_REDIRECT $CONFIG_IP_NF_NAT
++      if [ "$CONFIG_IP_NF_PPTP" = "m" ]; then
++        define_tristate CONFIG_IP_NF_NAT_PPTP m
++      else
++        if [ "$CONFIG_IP_NF_PPTP" = "y" ]; then
++          define_tristate CONFIG_IP_NF_NAT_PPTP $CONFIG_IP_NF_NAT
++        fi
++      fi
++      if [ "$CONFIG_IP_NF_CT_PROTO_GRE" = "m" ]; then
++        define_tristate CONFIG_IP_NF_NAT_PROTO_GRE m
++      else
++        if [ "$CONFIG_IP_NF_CT_PROTO_GRE" = "y" ]; then
++          define_tristate CONFIG_IP_NF_NAT_PROTO_GRE $CONFIG_IP_NF_NAT
++        fi
++      fi
+       if [ "$CONFIG_IP_NF_AMANDA" = "m" ]; then
+         define_tristate CONFIG_IP_NF_NAT_AMANDA m
+       else
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/ip_conntrack_core.c linux-2.4.29-dev/net/ipv4/netfilter/ip_conntrack_core.c
+--- linux-2.4.29-old/net/ipv4/netfilter/ip_conntrack_core.c	2005-04-02 19:04:11.000000000 +0200
++++ linux-2.4.29-dev/net/ipv4/netfilter/ip_conntrack_core.c	2005-04-02 19:07:18.000000000 +0200
+@@ -142,6 +142,8 @@
+ 	tuple->dst.ip = iph->daddr;
+ 	tuple->dst.protonum = iph->protocol;
+ 
++	tuple->src.u.all = tuple->dst.u.all = 0;
++
+ 	ret = protocol->pkt_to_tuple((u_int32_t *)iph + iph->ihl,
+ 				     len - 4*iph->ihl,
+ 				     tuple);
+@@ -157,6 +159,8 @@
+ 	inverse->dst.ip = orig->src.ip;
+ 	inverse->dst.protonum = orig->dst.protonum;
+ 
++	inverse->src.u.all = inverse->dst.u.all = 0;
++
+ 	return protocol->invert_tuple(inverse, orig);
+ }
+ 
+@@ -954,8 +958,8 @@
+ 	 * so there is no need to use the tuple lock too */
+ 
+ 	DEBUGP("ip_conntrack_expect_related %p\n", related_to);
+-	DEBUGP("tuple: "); DUMP_TUPLE(&expect->tuple);
+-	DEBUGP("mask:  "); DUMP_TUPLE(&expect->mask);
++	DEBUGP("tuple: "); DUMP_TUPLE_RAW(&expect->tuple);
++	DEBUGP("mask:  "); DUMP_TUPLE_RAW(&expect->mask);
+ 
+ 	old = LIST_FIND(&ip_conntrack_expect_list, resent_expect,
+ 		        struct ip_conntrack_expect *, &expect->tuple, 
+@@ -1072,15 +1076,14 @@
+ 
+ 	MUST_BE_READ_LOCKED(&ip_conntrack_lock);
+ 	WRITE_LOCK(&ip_conntrack_expect_tuple_lock);
+-
+ 	DEBUGP("change_expect:\n");
+-	DEBUGP("exp tuple: "); DUMP_TUPLE(&expect->tuple);
+-	DEBUGP("exp mask:  "); DUMP_TUPLE(&expect->mask);
+-	DEBUGP("newtuple:  "); DUMP_TUPLE(newtuple);
++	DEBUGP("exp tuple: "); DUMP_TUPLE_RAW(&expect->tuple);
++	DEBUGP("exp mask:  "); DUMP_TUPLE_RAW(&expect->mask);
++	DEBUGP("newtuple:  "); DUMP_TUPLE_RAW(newtuple);
+ 	if (expect->ct_tuple.dst.protonum == 0) {
+ 		/* Never seen before */
+ 		DEBUGP("change expect: never seen before\n");
+-		if (!ip_ct_tuple_equal(&expect->tuple, newtuple) 
++		if (!ip_ct_tuple_mask_cmp(&expect->tuple, newtuple, &expect->mask)
+ 		    && LIST_FIND(&ip_conntrack_expect_list, expect_clash,
+ 			         struct ip_conntrack_expect *, newtuple, &expect->mask)) {
+ 			/* Force NAT to find an unused tuple */
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/ip_conntrack_pptp.c linux-2.4.29-dev/net/ipv4/netfilter/ip_conntrack_pptp.c
+--- linux-2.4.29-old/net/ipv4/netfilter/ip_conntrack_pptp.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29-dev/net/ipv4/netfilter/ip_conntrack_pptp.c	2005-04-02 19:13:21.000000000 +0200
+@@ -0,0 +1,633 @@
++/*
++ * ip_conntrack_pptp.c	- Version 1.9
++ *
++ * Connection tracking support for PPTP (Point to Point Tunneling Protocol).
++ * PPTP is a a protocol for creating virtual private networks.
++ * It is a specification defined by Microsoft and some vendors
++ * working with Microsoft.  PPTP is built on top of a modified
++ * version of the Internet Generic Routing Encapsulation Protocol.
++ * GRE is defined in RFC 1701 and RFC 1702.  Documentation of
++ * PPTP can be found in RFC 2637
++ *
++ * (C) 2000-2003 by Harald Welte <laforge@gnumonks.org>
++ *
++ * Development of this code funded by Astaro AG (http://www.astaro.com/)
++ *
++ * Limitations:
++ * 	 - We blindly assume that control connections are always
++ * 	   established in PNS->PAC direction.  This is a violation
++ * 	   of RFFC2673
++ *
++ * TODO: - finish support for multiple calls within one session
++ * 	   (needs expect reservations in newnat)
++ *	 - testing of incoming PPTP calls 
++ *
++ * Changes: 
++ * 	2002-02-05 - Version 1.3
++ * 	  - Call ip_conntrack_unexpect_related() from 
++ * 	    pptp_timeout_related() to destroy expectations in case
++ * 	    CALL_DISCONNECT_NOTIFY or tcp fin packet was seen
++ * 	    (Philip Craig <philipc@snapgear.com>)
++ * 	  - Add Version information at module loadtime
++ * 	2002-02-10 - Version 1.6
++ * 	  - move to C99 style initializers
++ * 	  - remove second expectation if first arrives
++ *
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/netfilter.h>
++#include <linux/ip.h>
++#include <net/checksum.h>
++#include <net/tcp.h>
++
++#include <linux/netfilter_ipv4/lockhelp.h>
++#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
++#include <linux/netfilter_ipv4/ip_conntrack_proto_gre.h>
++#include <linux/netfilter_ipv4/ip_conntrack_pptp.h>
++
++#define IP_CT_PPTP_VERSION "1.9"
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
++MODULE_DESCRIPTION("Netfilter connection tracking helper module for PPTP");
++
++DECLARE_LOCK(ip_pptp_lock);
++
++#if 0
++#include "ip_conntrack_pptp_priv.h"
++#define DEBUGP(format, args...)	printk(KERN_DEBUG __FILE__ ":" __FUNCTION__ \
++					": " format, ## args)
++#else
++#define DEBUGP(format, args...)
++#endif
++
++#define SECS *HZ
++#define MINS * 60 SECS
++#define HOURS * 60 MINS
++#define DAYS * 24 HOURS
++
++#define PPTP_GRE_TIMEOUT 		(10 MINS)
++#define PPTP_GRE_STREAM_TIMEOUT 	(5 DAYS)
++
++static int pptp_expectfn(struct ip_conntrack *ct)
++{
++	struct ip_conntrack *master;
++	struct ip_conntrack_expect *exp;
++
++	DEBUGP("increasing timeouts\n");
++	/* increase timeout of GRE data channel conntrack entry */
++	ct->proto.gre.timeout = PPTP_GRE_TIMEOUT;
++	ct->proto.gre.stream_timeout = PPTP_GRE_STREAM_TIMEOUT;
++
++	master = master_ct(ct);
++	if (!master) {
++		DEBUGP(" no master!!!\n");
++		return 0;
++	}
++
++	exp = ct->master;
++	if (!exp) {
++		DEBUGP("no expectation!!\n");
++		return 0;
++	}
++
++	DEBUGP("completing tuples with ct info\n");
++	/* we can do this, since we're unconfirmed */
++	if (ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u.gre.key == 
++		htonl(master->help.ct_pptp_info.pac_call_id)) {	
++		/* assume PNS->PAC */
++		ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u.gre.key = 
++			htonl(master->help.ct_pptp_info.pns_call_id);
++		ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u.gre.key =
++			htonl(master->help.ct_pptp_info.pns_call_id);
++	} else {
++		/* assume PAC->PNS */
++		ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u.gre.key =
++			htonl(master->help.ct_pptp_info.pac_call_id);
++		ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u.gre.key =
++			htonl(master->help.ct_pptp_info.pac_call_id);
++	}
++	
++	/* delete other expectation */
++	if (exp->expected_list.next != &exp->expected_list) {
++		struct ip_conntrack_expect *other_exp;
++		struct list_head *cur_item, *next;
++
++		for (cur_item = master->sibling_list.next;
++		     cur_item != &master->sibling_list; cur_item = next) {
++			next = cur_item->next;
++			other_exp = list_entry(cur_item,
++					       struct ip_conntrack_expect,
++					       expected_list);
++			/* remove only if occurred at same sequence number */
++			if (other_exp != exp && other_exp->seq == exp->seq) {
++				DEBUGP("unexpecting other direction\n");
++				ip_ct_gre_keymap_destroy(other_exp);
++				ip_conntrack_unexpect_related(other_exp);
++			}
++		}
++	}
++
++	return 0;
++}
++
++/* timeout GRE data connections */
++static int pptp_timeout_related(struct ip_conntrack *ct)
++{
++	struct list_head *cur_item, *next;
++	struct ip_conntrack_expect *exp;
++
++	/* FIXME: do we have to lock something ? */
++	for (cur_item = ct->sibling_list.next;
++	    cur_item != &ct->sibling_list; cur_item = next) {
++		next = cur_item->next;
++		exp = list_entry(cur_item, struct ip_conntrack_expect,
++				 expected_list);
++
++		ip_ct_gre_keymap_destroy(exp);
++		if (!exp->sibling) {
++			ip_conntrack_unexpect_related(exp);
++			continue;
++		}
++
++		DEBUGP("setting timeout of conntrack %p to 0\n",
++			exp->sibling);
++		exp->sibling->proto.gre.timeout = 0;
++		exp->sibling->proto.gre.stream_timeout = 0;
++		ip_ct_refresh(exp->sibling, 0);
++	}
++
++	return 0;
++}
++
++/* expect GRE connections (PNS->PAC and PAC->PNS direction) */
++static inline int
++exp_gre(struct ip_conntrack *master,
++	u_int32_t seq,
++	u_int16_t callid,
++	u_int16_t peer_callid)
++{
++	struct ip_conntrack_expect exp;
++	struct ip_conntrack_tuple inv_tuple;
++
++	memset(&exp, 0, sizeof(exp));
++	/* tuple in original direction, PNS->PAC */
++	exp.tuple.src.ip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip;
++	exp.tuple.src.u.gre.key = htonl(ntohs(peer_callid));
++	exp.tuple.dst.ip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip;
++	exp.tuple.dst.u.gre.key = htonl(ntohs(callid));
++	exp.tuple.dst.protonum = IPPROTO_GRE;
++
++	exp.mask.src.ip = 0xffffffff;
++	exp.mask.src.u.all = 0;
++	exp.mask.dst.u.all = 0;
++	exp.mask.dst.u.gre.key = 0xffffffff;
++	exp.mask.dst.ip = 0xffffffff;
++	exp.mask.dst.protonum = 0xffff;
++			
++	exp.seq = seq;
++	exp.expectfn = pptp_expectfn;
++
++	exp.help.exp_pptp_info.pac_call_id = ntohs(callid);
++	exp.help.exp_pptp_info.pns_call_id = ntohs(peer_callid);
++
++	DEBUGP("calling expect_related ");
++	DUMP_TUPLE_RAW(&exp.tuple);
++	
++	/* Add GRE keymap entries */
++	if (ip_ct_gre_keymap_add(&exp, &exp.tuple, 0) != 0)
++		return 1;
++
++	invert_tuplepr(&inv_tuple, &exp.tuple);
++	if (ip_ct_gre_keymap_add(&exp, &inv_tuple, 1) != 0) {
++		ip_ct_gre_keymap_destroy(&exp);
++		return 1;
++	}
++	
++	if (ip_conntrack_expect_related(master, &exp) != 0) {
++		ip_ct_gre_keymap_destroy(&exp);
++		DEBUGP("cannot expect_related()\n");
++		return 1;
++	}
++
++	/* tuple in reply direction, PAC->PNS */
++	exp.tuple.src.ip = master->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip;
++	exp.tuple.src.u.gre.key = htonl(ntohs(callid));
++	exp.tuple.dst.ip = master->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
++	exp.tuple.dst.u.gre.key = htonl(ntohs(peer_callid));
++
++	DEBUGP("calling expect_related ");
++	DUMP_TUPLE_RAW(&exp.tuple);
++	
++	/* Add GRE keymap entries */
++	ip_ct_gre_keymap_add(&exp, &exp.tuple, 0);
++	invert_tuplepr(&inv_tuple, &exp.tuple);
++	ip_ct_gre_keymap_add(&exp, &inv_tuple, 1);
++	/* FIXME: cannot handle error correctly, since we need to free
++	 * the above keymap :( */
++	
++	if (ip_conntrack_expect_related(master, &exp) != 0) {
++		/* free the second pair of keypmaps */
++		ip_ct_gre_keymap_destroy(&exp);
++		DEBUGP("cannot expect_related():\n");
++		return 1;
++	}
++
++	return 0;
++}
++
++static inline int 
++pptp_inbound_pkt(struct tcphdr *tcph,
++		 struct pptp_pkt_hdr *pptph, 
++		 size_t datalen,
++		 struct ip_conntrack *ct,
++		 enum ip_conntrack_info ctinfo)
++{
++	struct PptpControlHeader *ctlh;
++        union pptp_ctrl_union pptpReq;
++	
++	struct ip_ct_pptp_master *info = &ct->help.ct_pptp_info;
++	u_int16_t msg, *cid, *pcid;
++	u_int32_t seq;	
++
++	ctlh = (struct PptpControlHeader *) 
++		((char *) pptph + sizeof(struct pptp_pkt_hdr));
++	pptpReq.rawreq = (void *) 
++		((char *) ctlh + sizeof(struct PptpControlHeader));
++
++	msg = ntohs(ctlh->messageType);
++	DEBUGP("inbound control message %s\n", strMName[msg]);
++
++	switch (msg) {
++	case PPTP_START_SESSION_REPLY:
++		/* server confirms new control session */
++		if (info->sstate < PPTP_SESSION_REQUESTED) {
++			DEBUGP("%s without START_SESS_REQUEST\n",
++				strMName[msg]);
++			break;
++		}
++		if (pptpReq.srep->resultCode == PPTP_START_OK)
++			info->sstate = PPTP_SESSION_CONFIRMED;
++		else 
++			info->sstate = PPTP_SESSION_ERROR;
++		break;
++
++	case PPTP_STOP_SESSION_REPLY:
++		/* server confirms end of control session */
++		if (info->sstate > PPTP_SESSION_STOPREQ) {
++			DEBUGP("%s without STOP_SESS_REQUEST\n",
++				strMName[msg]);
++			break;
++		}
++		if (pptpReq.strep->resultCode == PPTP_STOP_OK)
++			info->sstate = PPTP_SESSION_NONE;
++		else
++			info->sstate = PPTP_SESSION_ERROR;
++		break;
++
++	case PPTP_OUT_CALL_REPLY:
++		/* server accepted call, we now expect GRE frames */
++		if (info->sstate != PPTP_SESSION_CONFIRMED) {
++			DEBUGP("%s but no session\n", strMName[msg]);
++			break;
++		}
++		if (info->cstate != PPTP_CALL_OUT_REQ &&
++		    info->cstate != PPTP_CALL_OUT_CONF) {
++			DEBUGP("%s without OUTCALL_REQ\n", strMName[msg]);
++			break;
++		}
++		if (pptpReq.ocack->resultCode != PPTP_OUTCALL_CONNECT) {
++			info->cstate = PPTP_CALL_NONE;
++			break;
++		}
++
++		cid = &pptpReq.ocack->callID;
++		pcid = &pptpReq.ocack->peersCallID;
++
++		info->pac_call_id = ntohs(*cid);
++		
++		if (htons(info->pns_call_id) != *pcid) {
++			DEBUGP("%s for unknown callid %u\n",
++				strMName[msg], ntohs(*pcid));
++			break;
++		}
++
++		DEBUGP("%s, CID=%X, PCID=%X\n", strMName[msg], 
++			ntohs(*cid), ntohs(*pcid));
++		
++		info->cstate = PPTP_CALL_OUT_CONF;
++
++		seq = ntohl(tcph->seq) + ((void *)pcid - (void *)pptph);
++		if (exp_gre(ct, seq, *cid, *pcid) != 0)
++			printk("ip_conntrack_pptp: error during exp_gre\n");
++		break;
++
++	case PPTP_IN_CALL_REQUEST:
++		/* server tells us about incoming call request */
++		if (info->sstate != PPTP_SESSION_CONFIRMED) {
++			DEBUGP("%s but no session\n", strMName[msg]);
++			break;
++		}
++		pcid = &pptpReq.icack->peersCallID;
++		DEBUGP("%s, PCID=%X\n", strMName[msg], ntohs(*pcid));
++		info->cstate = PPTP_CALL_IN_REQ;
++		info->pac_call_id= ntohs(*pcid);
++		break;
++
++	case PPTP_IN_CALL_CONNECT:
++		/* server tells us about incoming call established */
++		if (info->sstate != PPTP_SESSION_CONFIRMED) {
++			DEBUGP("%s but no session\n", strMName[msg]);
++			break;
++		}
++		if (info->sstate != PPTP_CALL_IN_REP
++		    && info->sstate != PPTP_CALL_IN_CONF) {
++			DEBUGP("%s but never sent IN_CALL_REPLY\n",
++				strMName[msg]);
++			break;
++		}
++
++		pcid = &pptpReq.iccon->peersCallID;
++		cid = &info->pac_call_id;
++
++		if (info->pns_call_id != ntohs(*pcid)) {
++			DEBUGP("%s for unknown CallID %u\n", 
++				strMName[msg], ntohs(*cid));
++			break;
++		}
++
++		DEBUGP("%s, PCID=%X\n", strMName[msg], ntohs(*pcid));
++		info->cstate = PPTP_CALL_IN_CONF;
++
++		/* we expect a GRE connection from PAC to PNS */
++		seq = ntohl(tcph->seq) + ((void *)pcid - (void *)pptph);
++		if (exp_gre(ct, seq, *cid, *pcid) != 0)
++			printk("ip_conntrack_pptp: error during exp_gre\n");
++
++		break;
++
++	case PPTP_CALL_DISCONNECT_NOTIFY:
++		/* server confirms disconnect */
++		cid = &pptpReq.disc->callID;
++		DEBUGP("%s, CID=%X\n", strMName[msg], ntohs(*cid));
++		info->cstate = PPTP_CALL_NONE;
++
++		/* untrack this call id, unexpect GRE packets */
++		pptp_timeout_related(ct);
++		break;
++
++	case PPTP_WAN_ERROR_NOTIFY:
++		break;
++
++	case PPTP_ECHO_REQUEST:
++	case PPTP_ECHO_REPLY:
++		/* I don't have to explain these ;) */
++		break;
++	default:
++		DEBUGP("invalid %s (TY=%d)\n", (msg <= PPTP_MSG_MAX)
++			? strMName[msg]:strMName[0], msg);
++		break;
++	}
++
++	return NF_ACCEPT;
++
++}
++
++static inline int
++pptp_outbound_pkt(struct tcphdr *tcph,
++		  struct pptp_pkt_hdr *pptph,
++		  size_t datalen,
++		  struct ip_conntrack *ct,
++		  enum ip_conntrack_info ctinfo)
++{
++	struct PptpControlHeader *ctlh;
++        union pptp_ctrl_union pptpReq;
++	struct ip_ct_pptp_master *info = &ct->help.ct_pptp_info;
++	u_int16_t msg, *cid, *pcid;
++
++	ctlh = (struct PptpControlHeader *) ((void *) pptph + sizeof(*pptph));
++	pptpReq.rawreq = (void *) ((void *) ctlh + sizeof(*ctlh));
++
++	msg = ntohs(ctlh->messageType);
++	DEBUGP("outbound control message %s\n", strMName[msg]);
++
++	switch (msg) {
++	case PPTP_START_SESSION_REQUEST:
++		/* client requests for new control session */
++		if (info->sstate != PPTP_SESSION_NONE) {
++			DEBUGP("%s but we already have one",
++				strMName[msg]);
++		}
++		info->sstate = PPTP_SESSION_REQUESTED;
++		break;
++	case PPTP_STOP_SESSION_REQUEST:
++		/* client requests end of control session */
++		info->sstate = PPTP_SESSION_STOPREQ;
++		break;
++
++	case PPTP_OUT_CALL_REQUEST:
++		/* client initiating connection to server */
++		if (info->sstate != PPTP_SESSION_CONFIRMED) {
++			DEBUGP("%s but no session\n",
++				strMName[msg]);
++			break;
++		}
++		info->cstate = PPTP_CALL_OUT_REQ;
++		/* track PNS call id */
++		cid = &pptpReq.ocreq->callID;
++		DEBUGP("%s, CID=%X\n", strMName[msg], ntohs(*cid));
++		info->pns_call_id = ntohs(*cid);
++		break;
++	case PPTP_IN_CALL_REPLY:
++		/* client answers incoming call */
++		if (info->cstate != PPTP_CALL_IN_REQ
++		    && info->cstate != PPTP_CALL_IN_REP) {
++			DEBUGP("%s without incall_req\n", 
++				strMName[msg]);
++			break;
++		}
++		if (pptpReq.icack->resultCode != PPTP_INCALL_ACCEPT) {
++			info->cstate = PPTP_CALL_NONE;
++			break;
++		}
++		pcid = &pptpReq.icack->peersCallID;
++		if (info->pac_call_id != ntohs(*pcid)) {
++			DEBUGP("%s for unknown call %u\n", 
++				strMName[msg], ntohs(*pcid));
++			break;
++		}
++		DEBUGP("%s, CID=%X\n", strMName[msg], ntohs(*pcid));
++		/* part two of the three-way handshake */
++		info->cstate = PPTP_CALL_IN_REP;
++		info->pns_call_id = ntohs(pptpReq.icack->callID);
++		break;
++
++	case PPTP_CALL_CLEAR_REQUEST:
++		/* client requests hangup of call */
++		if (info->sstate != PPTP_SESSION_CONFIRMED) {
++			DEBUGP("CLEAR_CALL but no session\n");
++			break;
++		}
++		/* FUTURE: iterate over all calls and check if
++		 * call ID is valid.  We don't do this without newnat,
++		 * because we only know about last call */
++		info->cstate = PPTP_CALL_CLEAR_REQ;
++		break;
++	case PPTP_SET_LINK_INFO:
++		break;
++	case PPTP_ECHO_REQUEST:
++	case PPTP_ECHO_REPLY:
++		/* I don't have to explain these ;) */
++		break;
++	default:
++		DEBUGP("invalid %s (TY=%d)\n", (msg <= PPTP_MSG_MAX)? 
++			strMName[msg]:strMName[0], msg);
++		/* unknown: no need to create GRE masq table entry */
++		break;
++	}
++
++	return NF_ACCEPT;
++}
++
++
++/* track caller id inside control connection, call expect_related */
++static int 
++conntrack_pptp_help(const struct iphdr *iph, size_t len,
++		    struct ip_conntrack *ct, enum ip_conntrack_info ctinfo)
++
++{
++	struct pptp_pkt_hdr *pptph;
++	
++	struct tcphdr *tcph = (void *) iph + iph->ihl * 4;
++	u_int32_t tcplen = len - iph->ihl * 4;
++	u_int32_t datalen = tcplen - tcph->doff * 4;
++	void *datalimit;
++	int dir = CTINFO2DIR(ctinfo);
++	struct ip_ct_pptp_master *info = &ct->help.ct_pptp_info;
++
++	int oldsstate, oldcstate;
++	int ret;
++
++	/* don't do any tracking before tcp handshake complete */
++	if (ctinfo != IP_CT_ESTABLISHED 
++	    && ctinfo != IP_CT_ESTABLISHED+IP_CT_IS_REPLY) {
++		DEBUGP("ctinfo = %u, skipping\n", ctinfo);
++		return NF_ACCEPT;
++	}
++	
++	/* not a complete TCP header? */
++	if (tcplen < sizeof(struct tcphdr) || tcplen < tcph->doff * 4) {
++		DEBUGP("tcplen = %u\n", tcplen);
++		return NF_ACCEPT;
++	}
++
++	/* checksum invalid? */
++	if (tcp_v4_check(tcph, tcplen, iph->saddr, iph->daddr,
++			csum_partial((char *) tcph, tcplen, 0))) {
++		printk(KERN_NOTICE __FILE__ ": bad csum\n");
++		/* W2K PPTP server sends TCP packets with wrong checksum :(( */
++		//return NF_ACCEPT;
++	}
++
++	if (tcph->fin || tcph->rst) {
++		DEBUGP("RST/FIN received, timeouting GRE\n");
++		/* can't do this after real newnat */
++		info->cstate = PPTP_CALL_NONE;
++
++		/* untrack this call id, unexpect GRE packets */
++		pptp_timeout_related(ct);
++	}
++
++
++	pptph = (struct pptp_pkt_hdr *) ((void *) tcph + tcph->doff * 4);
++	datalimit = (void *) pptph + datalen;
++
++	/* not a full pptp packet header? */
++	if ((void *) pptph+sizeof(*pptph) >= datalimit) {
++		DEBUGP("no full PPTP header, can't track\n");
++		return NF_ACCEPT;
++	}
++	
++	/* if it's not a control message we can't do anything with it */
++        if (ntohs(pptph->packetType) != PPTP_PACKET_CONTROL ||
++	    ntohl(pptph->magicCookie) != PPTP_MAGIC_COOKIE) {
++		DEBUGP("not a control packet\n");
++		return NF_ACCEPT;
++	}
++
++	oldsstate = info->sstate;
++	oldcstate = info->cstate;
++
++	LOCK_BH(&ip_pptp_lock);
++
++	/* FIXME: We just blindly assume that the control connection is always
++	 * established from PNS->PAC.  However, RFC makes no guarantee */
++	if (dir == IP_CT_DIR_ORIGINAL)
++		/* client -> server (PNS -> PAC) */
++		ret = pptp_outbound_pkt(tcph, pptph, datalen, ct, ctinfo);
++	else
++		/* server -> client (PAC -> PNS) */
++		ret = pptp_inbound_pkt(tcph, pptph, datalen, ct, ctinfo);
++	DEBUGP("sstate: %d->%d, cstate: %d->%d\n",
++		oldsstate, info->sstate, oldcstate, info->cstate);
++	UNLOCK_BH(&ip_pptp_lock);
++
++	return ret;
++}
++
++/* control protocol helper */
++static struct ip_conntrack_helper pptp = { 
++	.list = { NULL, NULL },
++	.name = "pptp", 
++	.flags = IP_CT_HELPER_F_REUSE_EXPECT,
++	.me = THIS_MODULE,
++	.max_expected = 2,
++	.timeout = 0,
++	.tuple = { .src = { .ip = 0, 
++		 	    .u = { .tcp = { .port =  
++				    __constant_htons(PPTP_CONTROL_PORT) } } 
++			  }, 
++		   .dst = { .ip = 0, 
++			    .u = { .all = 0 },
++			    .protonum = IPPROTO_TCP
++			  } 
++		 },
++	.mask = { .src = { .ip = 0, 
++			   .u = { .tcp = { .port = 0xffff } } 
++			 }, 
++		  .dst = { .ip = 0, 
++			   .u = { .all = 0 },
++			   .protonum = 0xffff 
++		 	 } 
++		},
++	.help = conntrack_pptp_help
++};
++
++/* ip_conntrack_pptp initialization */
++static int __init init(void)
++{
++	int retcode;
++
++	DEBUGP(__FILE__ ": registering helper\n");
++	if ((retcode = ip_conntrack_helper_register(&pptp))) {
++                printk(KERN_ERR "Unable to register conntrack application "
++				"helper for pptp: %d\n", retcode);
++		return -EIO;
++	}
++
++	printk("ip_conntrack_pptp version %s loaded\n", IP_CT_PPTP_VERSION);
++	return 0;
++}
++
++static void __exit fini(void)
++{
++	ip_conntrack_helper_unregister(&pptp);
++	printk("ip_conntrack_pptp version %s unloaded\n", IP_CT_PPTP_VERSION);
++}
++
++module_init(init);
++module_exit(fini);
++
++EXPORT_SYMBOL(ip_pptp_lock);
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/ip_conntrack_pptp_priv.h linux-2.4.29-dev/net/ipv4/netfilter/ip_conntrack_pptp_priv.h
+--- linux-2.4.29-old/net/ipv4/netfilter/ip_conntrack_pptp_priv.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29-dev/net/ipv4/netfilter/ip_conntrack_pptp_priv.h	2005-04-02 19:14:10.000000000 +0200
+@@ -0,0 +1,24 @@
++#ifndef _IP_CT_PPTP_PRIV_H
++#define _IP_CT_PPTP_PRIV_H
++
++/* PptpControlMessageType names */
++static const char *strMName[] = {
++	"UNKNOWN_MESSAGE",
++	"START_SESSION_REQUEST",
++	"START_SESSION_REPLY",
++	"STOP_SESSION_REQUEST",
++	"STOP_SESSION_REPLY",
++	"ECHO_REQUEST",
++	"ECHO_REPLY",
++	"OUT_CALL_REQUEST",
++	"OUT_CALL_REPLY",
++	"IN_CALL_REQUEST",
++	"IN_CALL_REPLY",
++	"IN_CALL_CONNECT",
++	"CALL_CLEAR_REQUEST",
++	"CALL_DISCONNECT_NOTIFY",
++	"WAN_ERROR_NOTIFY",
++	"SET_LINK_INFO"
++};
++
++#endif
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/ip_conntrack_proto_gre.c linux-2.4.29-dev/net/ipv4/netfilter/ip_conntrack_proto_gre.c
+--- linux-2.4.29-old/net/ipv4/netfilter/ip_conntrack_proto_gre.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29-dev/net/ipv4/netfilter/ip_conntrack_proto_gre.c	2005-04-02 19:14:31.000000000 +0200
+@@ -0,0 +1,333 @@
++/*
++ * ip_conntrack_proto_gre.c - Version 1.2 
++ *
++ * Connection tracking protocol helper module for GRE.
++ *
++ * GRE is a generic encapsulation protocol, which is generally not very
++ * suited for NAT, as it has no protocol-specific part as port numbers.
++ *
++ * It has an optional key field, which may help us distinguishing two 
++ * connections between the same two hosts.
++ *
++ * GRE is defined in RFC 1701 and RFC 1702, as well as RFC 2784 
++ *
++ * PPTP is built on top of a modified version of GRE, and has a mandatory
++ * field called "CallID", which serves us for the same purpose as the key
++ * field in plain GRE.
++ *
++ * Documentation about PPTP can be found in RFC 2637
++ *
++ * (C) 2000-2003 by Harald Welte <laforge@gnumonks.org>
++ *
++ * Development of this code funded by Astaro AG (http://www.astaro.com/)
++ *
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/timer.h>
++#include <linux/netfilter.h>
++#include <linux/ip.h>
++#include <linux/in.h>
++#include <linux/list.h>
++
++#include <linux/netfilter_ipv4/lockhelp.h>
++
++DECLARE_RWLOCK(ip_ct_gre_lock);
++#define ASSERT_READ_LOCK(x) MUST_BE_READ_LOCKED(&ip_ct_gre_lock)
++#define ASSERT_WRITE_LOCK(x) MUST_BE_WRITE_LOCKED(&ip_ct_gre_lock)
++
++#include <linux/netfilter_ipv4/listhelp.h>
++#include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
++#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
++#include <linux/netfilter_ipv4/ip_conntrack_core.h>
++
++#include <linux/netfilter_ipv4/ip_conntrack_proto_gre.h>
++#include <linux/netfilter_ipv4/ip_conntrack_pptp.h>
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
++MODULE_DESCRIPTION("netfilter connection tracking protocol helper for GRE");
++
++/* shamelessly stolen from ip_conntrack_proto_udp.c */
++#define GRE_TIMEOUT		(30*HZ)
++#define GRE_STREAM_TIMEOUT	(180*HZ)
++
++#if 0
++#define DEBUGP(format, args...) printk(KERN_DEBUG __FILE__ ":" __FUNCTION__ \
++		                       ": " format, ## args)
++#define DUMP_TUPLE_GRE(x) printk("%u.%u.%u.%u:0x%x -> %u.%u.%u.%u:0x%x:%u:0x%x\n", \
++			NIPQUAD((x)->src.ip), ntohl((x)->src.u.gre.key), \
++			NIPQUAD((x)->dst.ip), ntohl((x)->dst.u.gre.key))
++#else
++#define DEBUGP(x, args...)
++#define DUMP_TUPLE_GRE(x)
++#endif
++				
++/* GRE KEYMAP HANDLING FUNCTIONS */
++static LIST_HEAD(gre_keymap_list);
++
++static inline int gre_key_cmpfn(const struct ip_ct_gre_keymap *km,
++				const struct ip_conntrack_tuple *t)
++{
++	return ((km->tuple.src.ip == t->src.ip) &&
++		(km->tuple.dst.ip == t->dst.ip) &&
++	        (km->tuple.dst.protonum == t->dst.protonum) &&
++	        (km->tuple.dst.u.all == t->dst.u.all));
++}
++
++/* look up the source key for a given tuple */
++static u_int32_t gre_keymap_lookup(struct ip_conntrack_tuple *t)
++{
++	struct ip_ct_gre_keymap *km;
++	u_int32_t key;
++
++	READ_LOCK(&ip_ct_gre_lock);
++	km = LIST_FIND(&gre_keymap_list, gre_key_cmpfn,
++			struct ip_ct_gre_keymap *, t);
++	if (!km) {
++		READ_UNLOCK(&ip_ct_gre_lock);
++		return 0;
++	}
++
++	key = km->tuple.src.u.gre.key;
++	READ_UNLOCK(&ip_ct_gre_lock);
++
++	return key;
++}
++
++/* add a single keymap entry, associate with specified expect */
++int ip_ct_gre_keymap_add(struct ip_conntrack_expect *exp,
++			 struct ip_conntrack_tuple *t, int reply)
++{
++	struct ip_ct_gre_keymap *km;
++
++	km = kmalloc(sizeof(*km), GFP_ATOMIC);
++	if (!km)
++		return -1;
++
++	/* initializing list head should be sufficient */
++	memset(km, 0, sizeof(*km));
++
++	memcpy(&km->tuple, t, sizeof(*t));
++
++	if (!reply)
++		exp->proto.gre.keymap_orig = km;
++	else
++		exp->proto.gre.keymap_reply = km;
++
++	DEBUGP("adding new entry %p: ", km);
++	DUMP_TUPLE_GRE(&km->tuple);
++
++	WRITE_LOCK(&ip_ct_gre_lock);
++	list_append(&gre_keymap_list, km);
++	WRITE_UNLOCK(&ip_ct_gre_lock);
++
++	return 0;
++}
++
++/* change the tuple of a keymap entry (used by nat helper) */
++void ip_ct_gre_keymap_change(struct ip_ct_gre_keymap *km,
++			     struct ip_conntrack_tuple *t)
++{
++	DEBUGP("changing entry %p to: ", km);
++	DUMP_TUPLE_GRE(t);
++
++	WRITE_LOCK(&ip_ct_gre_lock);
++	memcpy(&km->tuple, t, sizeof(km->tuple));
++	WRITE_UNLOCK(&ip_ct_gre_lock);
++}
++
++/* destroy the keymap entries associated with specified expect */
++void ip_ct_gre_keymap_destroy(struct ip_conntrack_expect *exp)
++{
++	DEBUGP("entering for exp %p\n", exp);
++	WRITE_LOCK(&ip_ct_gre_lock);
++	if (exp->proto.gre.keymap_orig) {
++		DEBUGP("removing %p from list\n", exp->proto.gre.keymap_orig);
++		list_del(&exp->proto.gre.keymap_orig->list);
++		kfree(exp->proto.gre.keymap_orig);
++		exp->proto.gre.keymap_orig = NULL;
++	}
++	if (exp->proto.gre.keymap_reply) {
++		DEBUGP("removing %p from list\n", exp->proto.gre.keymap_reply);
++		list_del(&exp->proto.gre.keymap_reply->list);
++		kfree(exp->proto.gre.keymap_reply);
++		exp->proto.gre.keymap_reply = NULL;
++	}
++	WRITE_UNLOCK(&ip_ct_gre_lock);
++}
++
++
++/* PUBLIC CONNTRACK PROTO HELPER FUNCTIONS */
++
++/* invert gre part of tuple */
++static int gre_invert_tuple(struct ip_conntrack_tuple *tuple,
++			    const struct ip_conntrack_tuple *orig)
++{
++	tuple->dst.u.gre.key = orig->src.u.gre.key;
++	tuple->src.u.gre.key = orig->dst.u.gre.key;
++
++	return 1;
++}
++
++/* gre hdr info to tuple */
++static int gre_pkt_to_tuple(const void *datah, size_t datalen,
++			    struct ip_conntrack_tuple *tuple)
++{
++	struct gre_hdr *grehdr = (struct gre_hdr *) datah;
++	struct gre_hdr_pptp *pgrehdr = (struct gre_hdr_pptp *) datah;
++	u_int32_t srckey;
++
++	/* core guarantees 8 protocol bytes, no need for size check */
++
++	switch (grehdr->version) {
++		case GRE_VERSION_1701:
++			if (!grehdr->key) {
++				DEBUGP("Can't track GRE without key\n");
++				return 0;
++			}
++			tuple->dst.u.gre.key = *(gre_key(grehdr));
++			break;
++
++		case GRE_VERSION_PPTP:
++			if (ntohs(grehdr->protocol) != GRE_PROTOCOL_PPTP) {
++				DEBUGP("GRE_VERSION_PPTP but unknown proto\n");
++				return 0;
++			}
++			tuple->dst.u.gre.key = htonl(ntohs(pgrehdr->call_id));
++			break;
++
++		default:
++			printk(KERN_WARNING "unknown GRE version %hu\n",
++				grehdr->version);
++			return 0;
++	}
++
++	srckey = gre_keymap_lookup(tuple);
++
++#if 0
++	DEBUGP("found src key %x for tuple ", ntohl(srckey));
++	DUMP_TUPLE_GRE(tuple);
++#endif
++	tuple->src.u.gre.key = srckey;
++
++	return 1;
++}
++
++/* print gre part of tuple */
++static unsigned int gre_print_tuple(char *buffer,
++				    const struct ip_conntrack_tuple *tuple)
++{
++	return sprintf(buffer, "srckey=0x%x dstkey=0x%x ", 
++			ntohl(tuple->src.u.gre.key),
++			ntohl(tuple->dst.u.gre.key));
++}
++
++/* print private data for conntrack */
++static unsigned int gre_print_conntrack(char *buffer,
++					const struct ip_conntrack *ct)
++{
++	return sprintf(buffer, "timeout=%u, stream_timeout=%u ",
++		       (ct->proto.gre.timeout / HZ),
++		       (ct->proto.gre.stream_timeout / HZ));
++}
++
++/* Returns verdict for packet, and may modify conntrack */
++static int gre_packet(struct ip_conntrack *ct,
++		      struct iphdr *iph, size_t len,
++		      enum ip_conntrack_info conntrackinfo)
++{
++	/* If we've seen traffic both ways, this is a GRE connection.
++	 * Extend timeout. */
++	if (ct->status & IPS_SEEN_REPLY) {
++		ip_ct_refresh(ct, ct->proto.gre.stream_timeout);
++		/* Also, more likely to be important, and not a probe. */
++		set_bit(IPS_ASSURED_BIT, &ct->status);
++	} else
++		ip_ct_refresh(ct, ct->proto.gre.timeout);
++	
++	return NF_ACCEPT;
++}
++
++/* Called when a new connection for this protocol found. */
++static int gre_new(struct ip_conntrack *ct,
++		   struct iphdr *iph, size_t len)
++{ 
++	DEBUGP(": ");
++	DUMP_TUPLE_GRE(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
++
++	/* initialize to sane value.  Ideally a conntrack helper
++	 * (e.g. in case of pptp) is increasing them */
++	ct->proto.gre.stream_timeout = GRE_STREAM_TIMEOUT;
++	ct->proto.gre.timeout = GRE_TIMEOUT;
++
++	return 1;
++}
++
++/* Called when a conntrack entry has already been removed from the hashes
++ * and is about to be deleted from memory */
++static void gre_destroy(struct ip_conntrack *ct)
++{
++	struct ip_conntrack_expect *master = ct->master;
++
++	DEBUGP(" entering\n");
++
++	if (!master) {
++		DEBUGP("no master exp for ct %p\n", ct);
++		return;
++	}
++
++	ip_ct_gre_keymap_destroy(master);
++}
++
++/* protocol helper struct */
++static struct ip_conntrack_protocol gre = { { NULL, NULL }, IPPROTO_GRE,
++					    "gre", 
++					    gre_pkt_to_tuple,
++					    gre_invert_tuple,
++					    gre_print_tuple,
++					    gre_print_conntrack,
++					    gre_packet,
++					    gre_new,
++					    gre_destroy,
++					    NULL,
++					    THIS_MODULE };
++
++/* ip_conntrack_proto_gre initialization */
++static int __init init(void)
++{
++	int retcode;
++
++	if ((retcode = ip_conntrack_protocol_register(&gre))) {
++                printk(KERN_ERR "Unable to register conntrack protocol "
++			        "helper for gre: %d\n",	retcode);
++		return -EIO;
++	}
++
++	return 0;
++}
++
++static void __exit fini(void)
++{
++	struct list_head *pos, *n;
++
++	/* delete all keymap entries */
++	WRITE_LOCK(&ip_ct_gre_lock);
++	list_for_each_safe(pos, n, &gre_keymap_list) {
++		DEBUGP("deleting keymap %p at module unload time\n", pos);
++		list_del(pos);
++		kfree(pos);
++	}
++	WRITE_UNLOCK(&ip_ct_gre_lock);
++
++	ip_conntrack_protocol_unregister(&gre); 
++}
++
++EXPORT_SYMBOL(ip_ct_gre_keymap_add);
++EXPORT_SYMBOL(ip_ct_gre_keymap_change);
++EXPORT_SYMBOL(ip_ct_gre_keymap_destroy);
++
++module_init(init);
++module_exit(fini);
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/ip_nat_core.c linux-2.4.29-dev/net/ipv4/netfilter/ip_nat_core.c
+--- linux-2.4.29-old/net/ipv4/netfilter/ip_nat_core.c	2005-01-19 15:10:13.000000000 +0100
++++ linux-2.4.29-dev/net/ipv4/netfilter/ip_nat_core.c	2005-04-02 19:07:18.000000000 +0200
+@@ -424,7 +424,7 @@
+ 	*tuple = *orig_tuple;
+ 	while ((rptr = find_best_ips_proto_fast(tuple, mr, conntrack, hooknum))
+ 	       != NULL) {
+-		DEBUGP("Found best for "); DUMP_TUPLE(tuple);
++		DEBUGP("Found best for "); DUMP_TUPLE_RAW(tuple);
+ 		/* 3) The per-protocol part of the manip is made to
+ 		   map into the range to make a unique tuple. */
+ 
+@@ -564,9 +564,9 @@
+ 		       HOOK2MANIP(hooknum)==IP_NAT_MANIP_SRC ? "SRC" : "DST",
+ 		       conntrack);
+ 		DEBUGP("Original: ");
+-		DUMP_TUPLE(&orig_tp);
++		DUMP_TUPLE_RAW(&orig_tp);
+ 		DEBUGP("New: ");
+-		DUMP_TUPLE(&new_tuple);
++		DUMP_TUPLE_RAW(&new_tuple);
+ #endif
+ 
+ 		/* We now have two tuples (SRCIP/SRCPT/DSTIP/DSTPT):
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/ip_nat_pptp.c linux-2.4.29-dev/net/ipv4/netfilter/ip_nat_pptp.c
+--- linux-2.4.29-old/net/ipv4/netfilter/ip_nat_pptp.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29-dev/net/ipv4/netfilter/ip_nat_pptp.c	2005-04-02 19:14:52.000000000 +0200
+@@ -0,0 +1,475 @@
++/*
++ * ip_nat_pptp.c	- Version 1.5
++ *
++ * NAT support for PPTP (Point to Point Tunneling Protocol).
++ * PPTP is a a protocol for creating virtual private networks.
++ * It is a specification defined by Microsoft and some vendors
++ * working with Microsoft.  PPTP is built on top of a modified
++ * version of the Internet Generic Routing Encapsulation Protocol.
++ * GRE is defined in RFC 1701 and RFC 1702.  Documentation of
++ * PPTP can be found in RFC 2637
++ *
++ * (C) 2000-2003 by Harald Welte <laforge@gnumonks.org>
++ *
++ * Development of this code funded by Astaro AG (http://www.astaro.com/)
++ *
++ * TODO: - Support for multiple calls within one session
++ * 	   (needs netfilter newnat code)
++ * 	 - NAT to a unique tuple, not to TCP source port
++ * 	   (needs netfilter tuple reservation)
++ *
++ * Changes:
++ *     2002-02-10 - Version 1.3
++ *       - Use ip_nat_mangle_tcp_packet() because of cloned skb's
++ *	   in local connections (Philip Craig <philipc@snapgear.com>)
++ *       - add checks for magicCookie and pptp version
++ *       - make argument list of pptp_{out,in}bound_packet() shorter
++ *       - move to C99 style initializers
++ *       - print version number at module loadtime
++ *     2003-09-22 - Version 1.5
++ *       - use SNATed tcp sourceport as callid, since we get called before
++ *         TCP header is mangled (Philip Craig <philipc@snapgear.com>)
++ * 
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/ip.h>
++#include <linux/tcp.h>
++#include <net/tcp.h>
++#include <linux/netfilter_ipv4/ip_nat.h>
++#include <linux/netfilter_ipv4/ip_nat_rule.h>
++#include <linux/netfilter_ipv4/ip_nat_helper.h>
++#include <linux/netfilter_ipv4/ip_nat_pptp.h>
++#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
++#include <linux/netfilter_ipv4/ip_conntrack_proto_gre.h>
++#include <linux/netfilter_ipv4/ip_conntrack_pptp.h>
++
++#define IP_NAT_PPTP_VERSION "1.5"
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
++MODULE_DESCRIPTION("Netfilter NAT helper module for PPTP");
++
++
++#if 0
++#include "ip_conntrack_pptp_priv.h"
++#define DEBUGP(format, args...) printk(KERN_DEBUG __FILE__ ":" __FUNCTION__ \
++				       ": " format, ## args)
++#else
++#define DEBUGP(format, args...)
++#endif
++
++static unsigned int
++pptp_nat_expected(struct sk_buff **pskb,
++		  unsigned int hooknum,
++		  struct ip_conntrack *ct,
++		  struct ip_nat_info *info)
++{
++	struct ip_conntrack *master = master_ct(ct);
++	struct ip_nat_multi_range mr;
++	struct ip_ct_pptp_master *ct_pptp_info;
++	struct ip_nat_pptp *nat_pptp_info;
++	u_int32_t newip, newcid;
++	int ret;
++
++	IP_NF_ASSERT(info);
++	IP_NF_ASSERT(master);
++	IP_NF_ASSERT(!(info->initialized & (1 << HOOK2MANIP(hooknum))));
++
++	DEBUGP("we have a connection!\n");
++
++	LOCK_BH(&ip_pptp_lock);
++	ct_pptp_info = &master->help.ct_pptp_info;
++	nat_pptp_info = &master->nat.help.nat_pptp_info;
++
++	/* need to alter GRE tuple because conntrack expectfn() used 'wrong'
++	 * (unmanipulated) values */
++	if (HOOK2MANIP(hooknum) == IP_NAT_MANIP_DST) {
++		DEBUGP("completing tuples with NAT info \n");
++		/* we can do this, since we're unconfirmed */
++		if (ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u.gre.key ==
++			htonl(ct_pptp_info->pac_call_id)) {	
++			/* assume PNS->PAC */
++			ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u.gre.key =
++				htonl(nat_pptp_info->pns_call_id);
++			ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u.gre.key =
++				htonl(nat_pptp_info->pns_call_id);
++			newip = master->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip;
++			newcid = htonl(nat_pptp_info->pac_call_id);
++		} else {
++			/* assume PAC->PNS */
++			ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u.gre.key =
++				htonl(nat_pptp_info->pac_call_id);
++			ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u.gre.key =
++				htonl(nat_pptp_info->pac_call_id);
++			newip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip;
++			newcid = htonl(nat_pptp_info->pns_call_id);
++		}
++	} else {
++		if (ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u.gre.key ==
++			htonl(ct_pptp_info->pac_call_id)) {	
++			/* assume PNS->PAC */
++			newip = master->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
++			newcid = htonl(ct_pptp_info->pns_call_id);
++		}
++		else {
++			/* assume PAC->PNS */
++			newip = master->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip;
++			newcid = htonl(ct_pptp_info->pac_call_id);
++		}
++	}
++
++	mr.rangesize = 1;
++	mr.range[0].flags = IP_NAT_RANGE_MAP_IPS | IP_NAT_RANGE_PROTO_SPECIFIED;
++	mr.range[0].min_ip = mr.range[0].max_ip = newip;
++	mr.range[0].min = mr.range[0].max = 
++		((union ip_conntrack_manip_proto ) { newcid }); 
++	DEBUGP("change ip to %u.%u.%u.%u\n", 
++		NIPQUAD(newip));
++	DEBUGP("change key to 0x%x\n", ntohl(newcid));
++	ret = ip_nat_setup_info(ct, &mr, hooknum);
++
++	UNLOCK_BH(&ip_pptp_lock);
++
++	return ret;
++
++}
++
++/* outbound packets == from PNS to PAC */
++static inline unsigned int
++pptp_outbound_pkt(struct sk_buff **pskb,
++		  struct ip_conntrack *ct,
++		  enum ip_conntrack_info ctinfo,
++		  struct ip_conntrack_expect *exp)
++
++{
++	struct iphdr *iph = (*pskb)->nh.iph;
++	struct tcphdr *tcph = (void *) iph + iph->ihl*4;
++	struct pptp_pkt_hdr *pptph = (struct pptp_pkt_hdr *) 
++					((void *)tcph + tcph->doff*4);
++
++	struct PptpControlHeader *ctlh;
++	union pptp_ctrl_union pptpReq;
++	struct ip_ct_pptp_master *ct_pptp_info = &ct->help.ct_pptp_info;
++	struct ip_nat_pptp *nat_pptp_info = &ct->nat.help.nat_pptp_info;
++
++	u_int16_t msg, *cid = NULL, new_callid;
++
++	/* FIXME: size checks !!! */
++	ctlh = (struct PptpControlHeader *) ((void *) pptph + sizeof(*pptph));
++	pptpReq.rawreq = (void *) ((void *) ctlh + sizeof(*ctlh));
++
++	new_callid = htons(ct_pptp_info->pns_call_id);
++	
++	switch (msg = ntohs(ctlh->messageType)) {
++		case PPTP_OUT_CALL_REQUEST:
++			cid = &pptpReq.ocreq->callID;
++			/* FIXME: ideally we would want to reserve a call ID
++			 * here.  current netfilter NAT core is not able to do
++			 * this :( For now we use TCP source port. This breaks
++			 * multiple calls within one control session */
++
++			/* save original call ID in nat_info */
++			nat_pptp_info->pns_call_id = ct_pptp_info->pns_call_id;
++
++			/* don't use tcph->source since we are at a DSTmanip
++			 * hook (e.g. PREROUTING) and pkt is not mangled yet */
++			new_callid = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u.tcp.port;
++
++			/* save new call ID in ct info */
++			ct_pptp_info->pns_call_id = ntohs(new_callid);
++			break;
++		case PPTP_IN_CALL_REPLY:
++			cid = &pptpReq.icreq->callID;
++			break;
++		case PPTP_CALL_CLEAR_REQUEST:
++			cid = &pptpReq.clrreq->callID;
++			break;
++		default:
++			DEBUGP("unknown outbound packet 0x%04x:%s\n", msg,
++			      (msg <= PPTP_MSG_MAX)? strMName[msg]:strMName[0]);
++			/* fall through */
++
++		case PPTP_SET_LINK_INFO:
++			/* only need to NAT in case PAC is behind NAT box */
++		case PPTP_START_SESSION_REQUEST:
++		case PPTP_START_SESSION_REPLY:
++		case PPTP_STOP_SESSION_REQUEST:
++		case PPTP_STOP_SESSION_REPLY:
++		case PPTP_ECHO_REQUEST:
++		case PPTP_ECHO_REPLY:
++			/* no need to alter packet */
++			return NF_ACCEPT;
++	}
++
++	IP_NF_ASSERT(cid);
++
++	DEBUGP("altering call id from 0x%04x to 0x%04x\n",
++		ntohs(*cid), ntohs(new_callid));
++
++	/* mangle packet */
++	ip_nat_mangle_tcp_packet(pskb, ct, ctinfo, (void *)cid - (void *)pptph,
++				 sizeof(new_callid), (char *)&new_callid,
++				 sizeof(new_callid));
++
++	return NF_ACCEPT;
++}
++
++/* inbound packets == from PAC to PNS */
++static inline unsigned int
++pptp_inbound_pkt(struct sk_buff **pskb,
++		 struct ip_conntrack *ct,
++		 enum ip_conntrack_info ctinfo,
++		 struct ip_conntrack_expect *oldexp)
++{
++	struct iphdr *iph = (*pskb)->nh.iph;
++	struct tcphdr *tcph = (void *) iph + iph->ihl*4;
++	struct pptp_pkt_hdr *pptph = (struct pptp_pkt_hdr *) 
++					((void *)tcph + tcph->doff*4);
++
++	struct PptpControlHeader *ctlh;
++	union pptp_ctrl_union pptpReq;
++	struct ip_ct_pptp_master *ct_pptp_info = &ct->help.ct_pptp_info;
++	struct ip_nat_pptp *nat_pptp_info = &ct->nat.help.nat_pptp_info;
++
++	u_int16_t msg, new_cid = 0, new_pcid, *pcid = NULL, *cid = NULL;
++	u_int32_t old_dst_ip;
++
++	struct ip_conntrack_tuple t, inv_t;
++	struct ip_conntrack_tuple *orig_t, *reply_t;
++
++	/* FIXME: size checks !!! */
++	ctlh = (struct PptpControlHeader *) ((void *) pptph + sizeof(*pptph));
++	pptpReq.rawreq = (void *) ((void *) ctlh + sizeof(*ctlh));
++
++	new_pcid = htons(nat_pptp_info->pns_call_id);
++
++	switch (msg = ntohs(ctlh->messageType)) {
++	case PPTP_OUT_CALL_REPLY:
++		pcid = &pptpReq.ocack->peersCallID;	
++		cid = &pptpReq.ocack->callID;
++		if (!oldexp) {
++			DEBUGP("outcall but no expectation\n");
++			break;
++		}
++		old_dst_ip = oldexp->tuple.dst.ip;
++		t = oldexp->tuple;
++		invert_tuplepr(&inv_t, &t);
++
++		/* save original PAC call ID in nat_info */
++		nat_pptp_info->pac_call_id = ct_pptp_info->pac_call_id;
++
++		/* alter expectation */
++		orig_t = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
++		reply_t = &ct->tuplehash[IP_CT_DIR_REPLY].tuple;
++		if (t.src.ip == orig_t->src.ip && t.dst.ip == orig_t->dst.ip) {
++			/* expectation for PNS->PAC direction */
++			t.src.u.gre.key = htonl(nat_pptp_info->pns_call_id);
++			t.dst.u.gre.key = htonl(ct_pptp_info->pac_call_id);
++			inv_t.src.ip = reply_t->src.ip;
++			inv_t.dst.ip = reply_t->dst.ip;
++			inv_t.src.u.gre.key = htonl(nat_pptp_info->pac_call_id);
++			inv_t.dst.u.gre.key = htonl(ct_pptp_info->pns_call_id);
++		} else {
++			/* expectation for PAC->PNS direction */
++			t.src.u.gre.key = htonl(nat_pptp_info->pac_call_id);
++			t.dst.u.gre.key = htonl(ct_pptp_info->pns_call_id);
++			inv_t.src.ip = orig_t->src.ip;
++			inv_t.dst.ip = orig_t->dst.ip;
++			inv_t.src.u.gre.key = htonl(nat_pptp_info->pns_call_id);
++			inv_t.dst.u.gre.key = htonl(ct_pptp_info->pac_call_id);
++		}
++
++		if (!ip_conntrack_change_expect(oldexp, &t)) {
++			DEBUGP("successfully changed expect\n");
++		} else {
++			DEBUGP("can't change expect\n");
++		}
++		ip_ct_gre_keymap_change(oldexp->proto.gre.keymap_orig, &t);
++		ip_ct_gre_keymap_change(oldexp->proto.gre.keymap_reply, &inv_t);
++		break;
++	case PPTP_IN_CALL_CONNECT:
++		pcid = &pptpReq.iccon->peersCallID;
++		if (!oldexp)
++			break;
++		old_dst_ip = oldexp->tuple.dst.ip;
++		t = oldexp->tuple;
++
++		/* alter expectation, no need for callID */
++		if (t.dst.ip == ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip) {
++			/* expectation for PNS->PAC direction */
++			t.src.ip = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
++		} else {
++			/* expectation for PAC->PNS direction */
++			t.dst.ip = ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip;
++		}
++
++		if (!ip_conntrack_change_expect(oldexp, &t)) {
++			DEBUGP("successfully changed expect\n");
++		} else {
++			DEBUGP("can't change expect\n");
++		}
++		break;
++	case PPTP_IN_CALL_REQUEST:
++		/* only need to nat in case PAC is behind NAT box */
++		break;
++	case PPTP_WAN_ERROR_NOTIFY:
++		pcid = &pptpReq.wanerr->peersCallID;
++		break;
++	case PPTP_CALL_DISCONNECT_NOTIFY:
++		pcid = &pptpReq.disc->callID;
++		break;
++
++	default:
++		DEBUGP("unknown inbound packet %s\n",
++			(msg <= PPTP_MSG_MAX)? strMName[msg]:strMName[0]);
++		/* fall through */
++
++	case PPTP_START_SESSION_REQUEST:
++	case PPTP_START_SESSION_REPLY:
++	case PPTP_STOP_SESSION_REQUEST:
++	case PPTP_STOP_SESSION_REPLY:
++	case PPTP_ECHO_REQUEST:
++	case PPTP_ECHO_REPLY:
++		/* no need to alter packet */
++		return NF_ACCEPT;
++	}
++
++	/* mangle packet */
++	IP_NF_ASSERT(pcid);
++	DEBUGP("altering peer call id from 0x%04x to 0x%04x\n",
++		ntohs(*pcid), ntohs(new_pcid));
++	ip_nat_mangle_tcp_packet(pskb, ct, ctinfo, (void *)pcid - (void *)pptph,
++				 sizeof(new_pcid), (char *)&new_pcid, 
++				 sizeof(new_pcid));
++
++	if (new_cid) {
++		IP_NF_ASSERT(cid);
++		DEBUGP("altering call id from 0x%04x to 0x%04x\n",
++			ntohs(*cid), ntohs(new_cid));
++		ip_nat_mangle_tcp_packet(pskb, ct, ctinfo, 
++					 (void *)cid - (void *)pptph, 
++					 sizeof(new_cid), (char *)&new_cid, 
++					 sizeof(new_cid));
++	}
++
++	/* great, at least we don't need to resize packets */
++	return NF_ACCEPT;
++}
++
++
++static unsigned int tcp_help(struct ip_conntrack *ct,
++			     struct ip_conntrack_expect *exp,
++			     struct ip_nat_info *info,
++			     enum ip_conntrack_info ctinfo,
++			     unsigned int hooknum, struct sk_buff **pskb)
++{
++	struct iphdr *iph = (*pskb)->nh.iph;
++	struct tcphdr *tcph = (void *) iph + iph->ihl*4;
++	unsigned int datalen = (*pskb)->len - iph->ihl*4 - tcph->doff*4;
++	struct pptp_pkt_hdr *pptph;
++
++	int dir;
++
++	DEBUGP("entering\n");
++
++	/* Only mangle things once: DST for original direction
++	   and SRC for reply direction. */
++	dir = CTINFO2DIR(ctinfo);
++	if (!((HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC
++	     && dir == IP_CT_DIR_ORIGINAL)
++	      || (HOOK2MANIP(hooknum) == IP_NAT_MANIP_DST
++		  && dir == IP_CT_DIR_REPLY))) {
++		DEBUGP("Not touching dir %s at hook %s\n",
++		       dir == IP_CT_DIR_ORIGINAL ? "ORIG" : "REPLY",
++		       hooknum == NF_IP_POST_ROUTING ? "POSTROUTING"
++		       : hooknum == NF_IP_PRE_ROUTING ? "PREROUTING"
++		       : hooknum == NF_IP_LOCAL_OUT ? "OUTPUT"
++		       : hooknum == NF_IP_LOCAL_IN ? "INPUT" : "???");
++		return NF_ACCEPT;
++	}
++
++	/* if packet is too small, just skip it */
++	if (datalen < sizeof(struct pptp_pkt_hdr)+
++		      sizeof(struct PptpControlHeader)) {
++		DEBUGP("pptp packet too short\n");
++		return NF_ACCEPT;	
++	}
++
++	pptph = (struct pptp_pkt_hdr *) ((void *)tcph + tcph->doff*4);
++
++	/* if it's not a control message, we can't handle it */
++	if (ntohs(pptph->packetType) != PPTP_PACKET_CONTROL ||
++	    ntohl(pptph->magicCookie) != PPTP_MAGIC_COOKIE) {
++		DEBUGP("not a pptp control packet\n");
++		return NF_ACCEPT;
++	}
++
++	LOCK_BH(&ip_pptp_lock);
++
++	if (dir == IP_CT_DIR_ORIGINAL) {
++		/* reuqests sent by client to server (PNS->PAC) */
++		pptp_outbound_pkt(pskb, ct, ctinfo, exp);
++	} else {
++		/* response from the server to the client (PAC->PNS) */
++		pptp_inbound_pkt(pskb, ct, ctinfo, exp);
++	}
++
++	UNLOCK_BH(&ip_pptp_lock);
++
++	return NF_ACCEPT;
++}
++
++/* nat helper struct for control connection */
++static struct ip_nat_helper pptp_tcp_helper = { 
++	.list = { NULL, NULL },
++	.name = "pptp", 
++	.flags = IP_NAT_HELPER_F_ALWAYS, 
++	.me = THIS_MODULE,
++	.tuple = { .src = { .ip = 0, 
++			    .u = { .tcp = { .port = 
++				    	__constant_htons(PPTP_CONTROL_PORT) } 
++				 } 
++			  },
++	  	   .dst = { .ip = 0, 
++			    .u = { .all = 0 }, 
++			    .protonum = IPPROTO_TCP 
++		   	  } 
++		 },
++
++	.mask = { .src = { .ip = 0, 
++			   .u = { .tcp = { .port = 0xFFFF } } 
++			 },
++		  .dst = { .ip = 0, 
++			   .u = { .all = 0 }, 
++			   .protonum = 0xFFFF 
++		  	 } 
++		},
++	.help = tcp_help, 
++	.expect = pptp_nat_expected 
++};
++
++			  
++static int __init init(void)
++{
++	DEBUGP("%s: registering NAT helper\n", __FILE__);
++	if (ip_nat_helper_register(&pptp_tcp_helper)) {
++		printk(KERN_ERR "Unable to register NAT application helper "
++				"for pptp\n");
++		return -EIO;
++	}
++
++	printk("ip_nat_pptp version %s loaded\n", IP_NAT_PPTP_VERSION);
++	return 0;
++}
++
++static void __exit fini(void)
++{
++	DEBUGP("cleanup_module\n" );
++	ip_nat_helper_unregister(&pptp_tcp_helper);
++	printk("ip_nat_pptp version %s unloaded\n", IP_NAT_PPTP_VERSION);
++}
++
++module_init(init);
++module_exit(fini);
+Binary files linux-2.4.29-old/net/ipv4/netfilter/.ip_nat_pptp.c.swp and linux-2.4.29-dev/net/ipv4/netfilter/.ip_nat_pptp.c.swp differ
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/ip_nat_proto_gre.c linux-2.4.29-dev/net/ipv4/netfilter/ip_nat_proto_gre.c
+--- linux-2.4.29-old/net/ipv4/netfilter/ip_nat_proto_gre.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.29-dev/net/ipv4/netfilter/ip_nat_proto_gre.c	2005-04-02 19:15:10.000000000 +0200
+@@ -0,0 +1,202 @@
++/*
++ * ip_nat_proto_gre.c - Version 1.2
++ *
++ * NAT protocol helper module for GRE.
++ *
++ * GRE is a generic encapsulation protocol, which is generally not very
++ * suited for NAT, as it has no protocol-specific part as port numbers.
++ *
++ * It has an optional key field, which may help us distinguishing two 
++ * connections between the same two hosts.
++ *
++ * GRE is defined in RFC 1701 and RFC 1702, as well as RFC 2784 
++ *
++ * PPTP is built on top of a modified version of GRE, and has a mandatory
++ * field called "CallID", which serves us for the same purpose as the key
++ * field in plain GRE.
++ *
++ * Documentation about PPTP can be found in RFC 2637
++ *
++ * (C) 2000-2003 by Harald Welte <laforge@gnumonks.org>
++ *
++ * Development of this code funded by Astaro AG (http://www.astaro.com/)
++ *
++ */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/ip.h>
++#include <linux/netfilter_ipv4/ip_nat.h>
++#include <linux/netfilter_ipv4/ip_nat_rule.h>
++#include <linux/netfilter_ipv4/ip_nat_protocol.h>
++#include <linux/netfilter_ipv4/ip_conntrack_proto_gre.h>
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
++MODULE_DESCRIPTION("Netfilter NAT protocol helper module for GRE");
++
++#if 0
++#define DEBUGP(format, args...) printk(KERN_DEBUG __FILE__ ":" __FUNCTION__ \
++				       ": " format, ## args)
++#else
++#define DEBUGP(x, args...)
++#endif
++
++/* is key in given range between min and max */
++static int
++gre_in_range(const struct ip_conntrack_tuple *tuple,
++	     enum ip_nat_manip_type maniptype,
++	     const union ip_conntrack_manip_proto *min,
++	     const union ip_conntrack_manip_proto *max)
++{
++	u_int32_t key;
++
++	if (maniptype == IP_NAT_MANIP_SRC)
++		key = tuple->src.u.gre.key;
++	else
++		key = tuple->dst.u.gre.key;
++
++	return ntohl(key) >= ntohl(min->gre.key)
++		&& ntohl(key) <= ntohl(max->gre.key);
++}
++
++/* generate unique tuple ... */
++static int 
++gre_unique_tuple(struct ip_conntrack_tuple *tuple,
++		 const struct ip_nat_range *range,
++		 enum ip_nat_manip_type maniptype,
++		 const struct ip_conntrack *conntrack)
++{
++	u_int32_t min, i, range_size;
++	u_int32_t key = 0, *keyptr;
++
++	if (maniptype == IP_NAT_MANIP_SRC)
++		keyptr = &tuple->src.u.gre.key;
++	else
++		keyptr = &tuple->dst.u.gre.key;
++
++	if (!(range->flags & IP_NAT_RANGE_PROTO_SPECIFIED)) {
++
++		DEBUGP("%p: NATing GRE PPTP\n", conntrack);
++		min = 1;
++		range_size = 0xffff;
++
++	} else {
++		min = ntohl(range->min.gre.key);
++		range_size = ntohl(range->max.gre.key) - min + 1;
++	}
++
++	DEBUGP("min = %u, range_size = %u\n", min, range_size); 
++
++	for (i = 0; i < range_size; i++, key++) {
++		*keyptr = htonl(min + key % range_size);
++		if (!ip_nat_used_tuple(tuple, conntrack))
++			return 1;
++	}
++
++	DEBUGP("%p: no NAT mapping\n", conntrack);
++
++	return 0;
++}
++
++/* manipulate a GRE packet according to maniptype */
++static void 
++gre_manip_pkt(struct iphdr *iph, size_t len, 
++	      const struct ip_conntrack_manip *manip,
++	      enum ip_nat_manip_type maniptype)
++{
++	struct gre_hdr *greh = (struct gre_hdr *)((u_int32_t *)iph+iph->ihl);
++	struct gre_hdr_pptp *pgreh = (struct gre_hdr_pptp *) greh;
++
++	/* we only have destination manip of a packet, since 'source key' 
++	 * is not present in the packet itself */
++	if (maniptype == IP_NAT_MANIP_DST) {
++		/* key manipulation is always dest */
++		switch (greh->version) {
++		case 0:
++			if (!greh->key) {
++				DEBUGP("can't nat GRE w/o key\n");
++				break;
++			}
++			if (greh->csum) {
++				/* FIXME: Never tested this code... */
++				*(gre_csum(greh)) = 
++					ip_nat_cheat_check(~*(gre_key(greh)),
++							manip->u.gre.key,
++							*(gre_csum(greh)));
++			}
++			*(gre_key(greh)) = manip->u.gre.key;
++			break;
++		case GRE_VERSION_PPTP:
++			DEBUGP("call_id -> 0x%04x\n", 
++				ntohl(manip->u.gre.key));
++			pgreh->call_id = htons(ntohl(manip->u.gre.key));
++			break;
++		default:
++			DEBUGP("can't nat unknown GRE version\n");
++			break;
++		}
++	}
++}
++
++/* print out a nat tuple */
++static unsigned int 
++gre_print(char *buffer, 
++	  const struct ip_conntrack_tuple *match,
++	  const struct ip_conntrack_tuple *mask)
++{
++	unsigned int len = 0;
++
++	if (mask->src.u.gre.key)
++		len += sprintf(buffer + len, "srckey=0x%x ", 
++				ntohl(match->src.u.gre.key));
++
++	if (mask->dst.u.gre.key)
++		len += sprintf(buffer + len, "dstkey=0x%x ",
++				ntohl(match->src.u.gre.key));
++
++	return len;
++}
++
++/* print a range of keys */
++static unsigned int 
++gre_print_range(char *buffer, const struct ip_nat_range *range)
++{
++	if (range->min.gre.key != 0 
++	    || range->max.gre.key != 0xFFFF) {
++		if (range->min.gre.key == range->max.gre.key)
++			return sprintf(buffer, "key 0x%x ",
++					ntohl(range->min.gre.key));
++		else
++			return sprintf(buffer, "keys 0x%u-0x%u ",
++					ntohl(range->min.gre.key),
++					ntohl(range->max.gre.key));
++	} else
++		return 0;
++}
++
++/* nat helper struct */
++static struct ip_nat_protocol gre = 
++	{ { NULL, NULL }, "GRE", IPPROTO_GRE,
++	  gre_manip_pkt,
++	  gre_in_range,
++	  gre_unique_tuple,
++	  gre_print,
++	  gre_print_range 
++	};
++				  
++static int __init init(void)
++{
++        if (ip_nat_protocol_register(&gre))
++                return -EIO;
++
++        return 0;
++}
++
++static void __exit fini(void)
++{
++        ip_nat_protocol_unregister(&gre);
++}
++
++module_init(init);
++module_exit(fini);
+diff -urN linux-2.4.29-old/net/ipv4/netfilter/Makefile linux-2.4.29-dev/net/ipv4/netfilter/Makefile
+--- linux-2.4.29-old/net/ipv4/netfilter/Makefile	2005-04-02 19:04:11.000000000 +0200
++++ linux-2.4.29-dev/net/ipv4/netfilter/Makefile	2005-04-02 19:07:18.000000000 +0200
+@@ -36,23 +36,32 @@
+ ifdef CONFIG_IP_NF_AMANDA
+ 	export-objs += ip_conntrack_amanda.o
+ endif
+-
+ obj-$(CONFIG_IP_NF_TFTP) += ip_conntrack_tftp.o
+ obj-$(CONFIG_IP_NF_FTP) += ip_conntrack_ftp.o
+ ifdef CONFIG_IP_NF_FTP
+ 	export-objs += ip_conntrack_ftp.o
+ endif
+-
+ obj-$(CONFIG_IP_NF_IRC) += ip_conntrack_irc.o
+ ifdef CONFIG_IP_NF_IRC
+ 	export-objs += ip_conntrack_irc.o
+ endif
++obj-$(CONFIG_IP_NF_CT_PROTO_GRE) += ip_conntrack_proto_gre.o
++ifdef CONFIG_IP_NF_CT_PROTO_GRE
++	export-objs += ip_conntrack_proto_gre.o
++endif
++obj-$(CONFIG_IP_NF_PPTP) += ip_conntrack_pptp.o
++ifdef CONFIG_IP_NF_NAT_PPTP
++	export-objs += ip_conntrack_pptp.o
++endif
++
+ 
+ # NAT helpers 
+ obj-$(CONFIG_IP_NF_NAT_AMANDA) += ip_nat_amanda.o
+ obj-$(CONFIG_IP_NF_NAT_TFTP) += ip_nat_tftp.o
+ obj-$(CONFIG_IP_NF_NAT_FTP) += ip_nat_ftp.o
+ obj-$(CONFIG_IP_NF_NAT_IRC) += ip_nat_irc.o
++obj-$(CONFIG_IP_NF_NAT_PROTO_GRE) += ip_nat_proto_gre.o
++obj-$(CONFIG_IP_NF_NAT_PPTP) += ip_nat_pptp.o
+ 
+ # generic IP tables 
+ obj-$(CONFIG_IP_NF_IPTABLES) += ip_tables.o
diff --git a/openwrt/target/linux/linux-2.4/patches/generic/604-netfilter_maxconn.patch b/openwrt/target/linux/linux-2.4/patches/generic/604-netfilter_maxconn.patch
new file mode 100644
index 0000000000..001ed67b88
--- /dev/null
+++ b/openwrt/target/linux/linux-2.4/patches/generic/604-netfilter_maxconn.patch
@@ -0,0 +1,20 @@
+--- ../../buildroot-unpacked/build_mipsel/linux/net/ipv4/netfilter/ip_conntrack_core.c	2004-11-28 22:59:36.000000000 -0500
++++ linux/net/ipv4/netfilter/ip_conntrack_core.c	2004-11-30 05:05:32.000000000 -0500
+@@ -1386,7 +1386,7 @@
+ 	nf_unregister_sockopt(&so_getorigdst);
+ }
+ 
+-static int hashsize = 0;
++static int hashsize = 5953;
+ MODULE_PARM(hashsize, "i");
+ 
+ int __init ip_conntrack_init(void)
+@@ -1407,7 +1407,7 @@
+ 		if (ip_conntrack_htable_size < 16)
+ 			ip_conntrack_htable_size = 16;
+ 	}
+-	ip_conntrack_max = 8 * ip_conntrack_htable_size;
++	ip_conntrack_max = ip_conntrack_htable_size;
+ 
+ 	printk("ip_conntrack version %s (%u buckets, %d max)"
+ 	       " - %Zd bytes per conntrack\n", IP_CONNTRACK_VERSION,
diff --git a/openwrt/target/linux/linux-2.4/patches/generic/605-netfilter_TTL.patch b/openwrt/target/linux/linux-2.4/patches/generic/605-netfilter_TTL.patch
new file mode 100644
index 0000000000..0aa3c80432
--- /dev/null
+++ b/openwrt/target/linux/linux-2.4/patches/generic/605-netfilter_TTL.patch
@@ -0,0 +1,180 @@
+diff -urN linux-2.4.30.old/Documentation/Configure.help linux-2.4.30.dev/Documentation/Configure.help
+--- linux-2.4.30.old/Documentation/Configure.help	2005-04-27 11:35:46.000000000 +0200
++++ linux-2.4.30.dev/Documentation/Configure.help	2005-04-27 11:43:49.000000000 +0200
+@@ -3209,6 +3209,15 @@
+   If you want to compile it as a module, say M here and read
+   <file:Documentation/modules.txt>.  If unsure, say `N'.
+ 
++TTL target support
++CONFIG_IP_NF_TARGET_TTL
++  This option adds a `TTL' target, which enables the user to set
++  the TTL value or increment / decrement the TTL value by a given
++  amount.
++
++  If you want to compile it as a module, say M here and read
++  Documentation/modules.txt.  If unsure, say `N'.
++
+ ipchains (2.2-style) support
+ CONFIG_IP_NF_COMPAT_IPCHAINS
+   This option places ipchains (with masquerading and redirection
+diff -urN linux-2.4.30.old/include/linux/netfilter_ipv4/ipt_TTL.h linux-2.4.30.dev/include/linux/netfilter_ipv4/ipt_TTL.h
+--- linux-2.4.30.old/include/linux/netfilter_ipv4/ipt_TTL.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.30.dev/include/linux/netfilter_ipv4/ipt_TTL.h	2005-04-27 11:43:49.000000000 +0200
+@@ -0,0 +1,21 @@
++/* TTL modification module for IP tables
++ * (C) 2000 by Harald Welte <laforge@gnumonks.org> */
++
++#ifndef _IPT_TTL_H
++#define _IPT_TTL_H
++
++enum {
++	IPT_TTL_SET = 0,
++	IPT_TTL_INC,
++	IPT_TTL_DEC
++};
++
++#define IPT_TTL_MAXMODE	IPT_TTL_DEC
++
++struct ipt_TTL_info {
++	u_int8_t	mode;
++	u_int8_t	ttl;
++};
++
++
++#endif
+diff -urN linux-2.4.30.old/net/ipv4/netfilter/Config.in linux-2.4.30.dev/net/ipv4/netfilter/Config.in
+--- linux-2.4.30.old/net/ipv4/netfilter/Config.in	2005-04-27 11:35:45.000000000 +0200
++++ linux-2.4.30.dev/net/ipv4/netfilter/Config.in	2005-04-27 11:43:49.000000000 +0200
+@@ -129,6 +129,7 @@
+     dep_tristate '    MARK target support' CONFIG_IP_NF_TARGET_MARK $CONFIG_IP_NF_MANGLE
+   fi
+   dep_tristate '  LOG target support' CONFIG_IP_NF_TARGET_LOG $CONFIG_IP_NF_IPTABLES
++  dep_tristate '  TTL target support' CONFIG_IP_NF_TARGET_TTL $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  ULOG target support' CONFIG_IP_NF_TARGET_ULOG $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  TCPMSS target support' CONFIG_IP_NF_TARGET_TCPMSS $CONFIG_IP_NF_IPTABLES
+ fi
+diff -urN linux-2.4.30.old/net/ipv4/netfilter/ipt_TTL.c linux-2.4.30.dev/net/ipv4/netfilter/ipt_TTL.c
+--- linux-2.4.30.old/net/ipv4/netfilter/ipt_TTL.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.30.dev/net/ipv4/netfilter/ipt_TTL.c	2005-04-27 11:43:49.000000000 +0200
+@@ -0,0 +1,110 @@
++/* TTL modification target for IP tables
++ * (C) 2000 by Harald Welte <laforge@gnumonks.org>
++ *
++ * Version: $Revision: 1.1 $
++ *
++ * This software is distributed under the terms of GNU GPL
++ */
++
++#include <linux/module.h>
++#include <linux/skbuff.h>
++#include <linux/ip.h>
++#include <net/checksum.h>
++
++#include <linux/netfilter_ipv4/ip_tables.h>
++#include <linux/netfilter_ipv4/ipt_TTL.h>
++
++MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
++MODULE_DESCRIPTION("IP tables TTL modification module");
++MODULE_LICENSE("GPL");
++
++static unsigned int ipt_ttl_target(struct sk_buff **pskb, unsigned int hooknum,
++		const struct net_device *in, const struct net_device *out,
++		const void *targinfo, void *userinfo)
++{
++	struct iphdr *iph = (*pskb)->nh.iph;
++	const struct ipt_TTL_info *info = targinfo;
++	u_int16_t diffs[2];
++	int new_ttl;
++			 
++	switch (info->mode) {
++		case IPT_TTL_SET:
++			new_ttl = info->ttl;
++			break;
++		case IPT_TTL_INC:
++			new_ttl = iph->ttl + info->ttl;
++			if (new_ttl > 255)
++				new_ttl = 255;
++			break;
++		case IPT_TTL_DEC:
++			new_ttl = iph->ttl - info->ttl;
++			if (new_ttl < 0)
++				new_ttl = 0;
++			break;
++		default:
++			new_ttl = iph->ttl;
++			break;
++	}
++
++	if (new_ttl != iph->ttl) {
++		diffs[0] = htons(((unsigned)iph->ttl) << 8) ^ 0xFFFF;
++		iph->ttl = new_ttl;
++		diffs[1] = htons(((unsigned)iph->ttl) << 8);
++		iph->check = csum_fold(csum_partial((char *)diffs,
++						    sizeof(diffs),
++				 	            iph->check^0xFFFF));
++									                	(*pskb)->nfcache |= NFC_ALTERED;
++	}
++
++	return IPT_CONTINUE;
++}
++
++static int ipt_ttl_checkentry(const char *tablename,
++		const struct ipt_entry *e,
++		void *targinfo,
++		unsigned int targinfosize,
++		unsigned int hook_mask)
++{
++	struct ipt_TTL_info *info = targinfo;
++
++	if (targinfosize != IPT_ALIGN(sizeof(struct ipt_TTL_info))) {
++		printk(KERN_WARNING "TTL: targinfosize %u != %Zu\n",
++				targinfosize,
++				IPT_ALIGN(sizeof(struct ipt_TTL_info)));
++		return 0;	
++	}	
++
++	if (strcmp(tablename, "mangle")) {
++		printk(KERN_WARNING "TTL: can only be called from \"mangle\" table, not \"%s\"\n", tablename);
++		return 0;
++	}
++
++	if (info->mode > IPT_TTL_MAXMODE) {
++		printk(KERN_WARNING "TTL: invalid or unknown Mode %u\n", 
++			info->mode);
++		return 0;
++	}
++
++	if ((info->mode != IPT_TTL_SET) && (info->ttl == 0)) {
++		printk(KERN_WARNING "TTL: increment/decrement doesn't make sense with value 0\n");
++		return 0;
++	}
++	
++	return 1;
++}
++
++static struct ipt_target ipt_TTL = { { NULL, NULL }, "TTL", 
++	ipt_ttl_target, ipt_ttl_checkentry, NULL, THIS_MODULE };
++
++static int __init init(void)
++{
++	return ipt_register_target(&ipt_TTL);
++}
++
++static void __exit fini(void)
++{
++	ipt_unregister_target(&ipt_TTL);
++}
++
++module_init(init);
++module_exit(fini);
+diff -urN linux-2.4.30.old/net/ipv4/netfilter/Makefile linux-2.4.30.dev/net/ipv4/netfilter/Makefile
+--- linux-2.4.30.old/net/ipv4/netfilter/Makefile	2005-04-27 11:35:45.000000000 +0200
++++ linux-2.4.30.dev/net/ipv4/netfilter/Makefile	2005-04-27 11:43:49.000000000 +0200
+@@ -112,6 +112,7 @@
+ obj-$(CONFIG_IP_NF_TARGET_REDIRECT) += ipt_REDIRECT.o
+ obj-$(CONFIG_IP_NF_NAT_SNMP_BASIC) += ip_nat_snmp_basic.o
+ obj-$(CONFIG_IP_NF_TARGET_LOG) += ipt_LOG.o
++obj-$(CONFIG_IP_NF_TARGET_TTL) += ipt_TTL.o
+ obj-$(CONFIG_IP_NF_TARGET_ULOG) += ipt_ULOG.o
+ obj-$(CONFIG_IP_NF_TARGET_TCPMSS) += ipt_TCPMSS.o
+ 
diff --git a/openwrt/target/linux/linux-2.4/patches/generic/606-netfilter_NETMAP.patch b/openwrt/target/linux/linux-2.4/patches/generic/606-netfilter_NETMAP.patch
new file mode 100644
index 0000000000..ccd639181e
--- /dev/null
+++ b/openwrt/target/linux/linux-2.4/patches/generic/606-netfilter_NETMAP.patch
@@ -0,0 +1,159 @@
+diff -urN linux-2.4.30.orig/Documentation/Configure.help linux-2.4.30/Documentation/Configure.help
+--- linux-2.4.30.orig/Documentation/Configure.help	2005-07-01 02:06:36.000000000 +0200
++++ linux-2.4.30/Documentation/Configure.help	2005-07-01 00:41:09.000000000 +0200
+@@ -3086,6 +3086,17 @@
+   If you want to compile it as a module, say M here and read
+   <file:Documentation/modules.txt>.  If unsure, say `N'.
+ 
++NETMAP target support
++CONFIG_IP_NF_TARGET_NETMAP
++  NETMAP is an implementation of static 1:1 NAT mapping of network
++  addresses. It maps the network address part, while keeping the
++  host address part intact. It is similar to Fast NAT, except that
++  Netfilter's connection tracking doesn't work well with Fast NAT.
++
++  If you want to compile it as a module, say M here and read
++  Documentation/modules.txt.  The module will be called
++  ipt_NETMAP.o.  If unsure, say `N'.
++
+ Packet mangling
+ CONFIG_IP_NF_MANGLE
+   This option adds a `mangle' table to iptables: see the man page for
+diff -urN linux-2.4.30.orig/net/ipv4/netfilter/Config.in linux-2.4.30/net/ipv4/netfilter/Config.in
+--- linux-2.4.30.orig/net/ipv4/netfilter/Config.in	2005-07-01 02:06:35.000000000 +0200
++++ linux-2.4.30/net/ipv4/netfilter/Config.in	2005-07-01 00:41:09.000000000 +0200
+@@ -69,6 +69,7 @@
+       define_bool CONFIG_IP_NF_NAT_NEEDED y
+       dep_tristate '    MASQUERADE target support' CONFIG_IP_NF_TARGET_MASQUERADE $CONFIG_IP_NF_NAT
+       dep_tristate '    REDIRECT target support' CONFIG_IP_NF_TARGET_REDIRECT $CONFIG_IP_NF_NAT
++      dep_tristate '    NETMAP target support' CONFIG_IP_NF_TARGET_NETMAP $CONFIG_IP_NF_NAT
+       if [ "$CONFIG_IP_NF_PPTP" = "m" ]; then
+         define_tristate CONFIG_IP_NF_NAT_PPTP m
+       else
+diff -urN linux-2.4.30.orig/net/ipv4/netfilter/ipt_NETMAP.c linux-2.4.30/net/ipv4/netfilter/ipt_NETMAP.c
+--- linux-2.4.30.orig/net/ipv4/netfilter/ipt_NETMAP.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.30/net/ipv4/netfilter/ipt_NETMAP.c	2005-07-01 00:41:09.000000000 +0200
+@@ -0,0 +1,112 @@
++/* NETMAP - static NAT mapping of IP network addresses (1:1).
++   The mapping can be applied to source (POSTROUTING),
++   destination (PREROUTING), or both (with separate rules).
++
++   Author: Svenning Soerensen <svenning@post5.tele.dk>
++*/
++
++#include <linux/config.h>
++#include <linux/ip.h>
++#include <linux/module.h>
++#include <linux/netdevice.h>
++#include <linux/netfilter.h>
++#include <linux/netfilter_ipv4.h>
++#include <linux/netfilter_ipv4/ip_nat_rule.h>
++
++#define MODULENAME "NETMAP"
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Svenning Soerensen <svenning@post5.tele.dk>");
++MODULE_DESCRIPTION("iptables 1:1 NAT mapping of IP networks target");
++
++#if 0
++#define DEBUGP printk
++#else
++#define DEBUGP(format, args...)
++#endif
++
++static int
++check(const char *tablename,
++      const struct ipt_entry *e,
++      void *targinfo,
++      unsigned int targinfosize,
++      unsigned int hook_mask)
++{
++	const struct ip_nat_multi_range *mr = targinfo;
++
++	if (strcmp(tablename, "nat") != 0) {
++		DEBUGP(MODULENAME":check: bad table `%s'.\n", tablename);
++		return 0;
++	}
++	if (targinfosize != IPT_ALIGN(sizeof(*mr))) {
++		DEBUGP(MODULENAME":check: size %u.\n", targinfosize);
++		return 0;
++	}
++	if (hook_mask & ~((1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_POST_ROUTING))) {
++		DEBUGP(MODULENAME":check: bad hooks %x.\n", hook_mask);
++		return 0;
++	}
++	if (!(mr->range[0].flags & IP_NAT_RANGE_MAP_IPS)) {
++		DEBUGP(MODULENAME":check: bad MAP_IPS.\n");
++		return 0;
++	}
++	if (mr->rangesize != 1) {
++		DEBUGP(MODULENAME":check: bad rangesize %u.\n", mr->rangesize);
++		return 0;
++	}
++	return 1;
++}
++
++static unsigned int
++target(struct sk_buff **pskb,
++       unsigned int hooknum,
++       const struct net_device *in,
++       const struct net_device *out,
++       const void *targinfo,
++       void *userinfo)
++{
++	struct ip_conntrack *ct;
++	enum ip_conntrack_info ctinfo;
++	u_int32_t new_ip, netmask;
++	const struct ip_nat_multi_range *mr = targinfo;
++	struct ip_nat_multi_range newrange;
++
++	IP_NF_ASSERT(hooknum == NF_IP_PRE_ROUTING
++		     || hooknum == NF_IP_POST_ROUTING);
++	ct = ip_conntrack_get(*pskb, &ctinfo);
++
++	netmask = ~(mr->range[0].min_ip ^ mr->range[0].max_ip);
++
++	if (hooknum == NF_IP_PRE_ROUTING)
++		new_ip = (*pskb)->nh.iph->daddr & ~netmask;
++	else
++		new_ip = (*pskb)->nh.iph->saddr & ~netmask;
++	new_ip |= mr->range[0].min_ip & netmask;
++
++	newrange = ((struct ip_nat_multi_range)
++	{ 1, { { mr->range[0].flags | IP_NAT_RANGE_MAP_IPS,
++		 new_ip, new_ip,
++		 mr->range[0].min, mr->range[0].max } } });
++
++	/* Hand modified range to generic setup. */
++	return ip_nat_setup_info(ct, &newrange, hooknum);
++}
++
++static struct ipt_target target_module = { 
++	.name = MODULENAME,
++	.target = target,
++	.checkentry = check,
++	.me = THIS_MODULE
++};
++
++static int __init init(void)
++{
++	return ipt_register_target(&target_module);
++}
++
++static void __exit fini(void)
++{
++	ipt_unregister_target(&target_module);
++}
++
++module_init(init);
++module_exit(fini);
+diff -urN linux-2.4.30.orig/net/ipv4/netfilter/Makefile linux-2.4.30/net/ipv4/netfilter/Makefile
+--- linux-2.4.30.orig/net/ipv4/netfilter/Makefile	2005-07-01 02:06:35.000000000 +0200
++++ linux-2.4.30/net/ipv4/netfilter/Makefile	2005-07-01 00:41:09.000000000 +0200
+@@ -110,6 +110,7 @@
+ obj-$(CONFIG_IP_NF_TARGET_MARK) += ipt_MARK.o
+ obj-$(CONFIG_IP_NF_TARGET_MASQUERADE) += ipt_MASQUERADE.o
+ obj-$(CONFIG_IP_NF_TARGET_REDIRECT) += ipt_REDIRECT.o
++obj-$(CONFIG_IP_NF_TARGET_NETMAP) += ipt_NETMAP.o
+ obj-$(CONFIG_IP_NF_NAT_SNMP_BASIC) += ip_nat_snmp_basic.o
+ obj-$(CONFIG_IP_NF_TARGET_LOG) += ipt_LOG.o
+ obj-$(CONFIG_IP_NF_TARGET_TTL) += ipt_TTL.o
diff --git a/openwrt/target/linux/linux-2.4/patches/generic/607-netfilter_connmark.patch b/openwrt/target/linux/linux-2.4/patches/generic/607-netfilter_connmark.patch
new file mode 100644
index 0000000000..154314dc41
--- /dev/null
+++ b/openwrt/target/linux/linux-2.4/patches/generic/607-netfilter_connmark.patch
@@ -0,0 +1,351 @@
+diff -urN linux.old/include/linux/netfilter_ipv4/ip_conntrack.h linux.dev/include/linux/netfilter_ipv4/ip_conntrack.h
+--- linux.old/include/linux/netfilter_ipv4/ip_conntrack.h	2005-08-20 20:02:06.619827000 +0200
++++ linux.dev/include/linux/netfilter_ipv4/ip_conntrack.h	2005-08-20 20:19:23.302029232 +0200
+@@ -226,6 +226,9 @@
+ 		unsigned int app_data_len;
+ 	} layer7;
+ #endif
++#if defined(CONFIG_IP_NF_CONNTRACK_MARK)
++	unsigned long mark;
++#endif
+ };
+ 
+ /* get master conntrack via master expectation */
+diff -urN linux.old/include/linux/netfilter_ipv4/ipt_CONNMARK.h linux.dev/include/linux/netfilter_ipv4/ipt_CONNMARK.h
+--- linux.old/include/linux/netfilter_ipv4/ipt_CONNMARK.h	1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/include/linux/netfilter_ipv4/ipt_CONNMARK.h	2005-08-20 20:19:41.058329864 +0200
+@@ -0,0 +1,25 @@
++#ifndef _IPT_CONNMARK_H_target
++#define _IPT_CONNMARK_H_target
++
++/* Copyright (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
++ * by Henrik Nordstrom <hno@marasystems.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ */
++
++enum {
++	IPT_CONNMARK_SET = 0,
++	IPT_CONNMARK_SAVE,
++	IPT_CONNMARK_RESTORE
++};
++
++struct ipt_connmark_target_info {
++	unsigned long mark;
++	unsigned long mask;
++	u_int8_t mode;
++};
++
++#endif /*_IPT_CONNMARK_H_target*/
+diff -urN linux.old/include/linux/netfilter_ipv4/ipt_connmark.h linux.dev/include/linux/netfilter_ipv4/ipt_connmark.h
+--- linux.old/include/linux/netfilter_ipv4/ipt_connmark.h	1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/include/linux/netfilter_ipv4/ipt_connmark.h	2005-08-20 20:19:41.058329864 +0200
+@@ -0,0 +1,18 @@
++#ifndef _IPT_CONNMARK_H
++#define _IPT_CONNMARK_H
++
++/* Copyright (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
++ * by Henrik Nordstrom <hno@marasystems.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ */
++
++struct ipt_connmark_info {
++	unsigned long mark, mask;
++	u_int8_t invert;
++};
++
++#endif /*_IPT_CONNMARK_H*/
+diff -urN linux.old/net/ipv4/netfilter/Config.in linux.dev/net/ipv4/netfilter/Config.in
+--- linux.old/net/ipv4/netfilter/Config.in	2005-08-20 20:02:09.325416000 +0200
++++ linux.dev/net/ipv4/netfilter/Config.in	2005-08-20 20:29:11.546602464 +0200
+@@ -6,7 +6,8 @@
+ 
+ tristate 'Connection tracking (required for masq/NAT)' CONFIG_IP_NF_CONNTRACK
+ if [ "$CONFIG_IP_NF_CONNTRACK" != "n" ]; then
+-  dep_tristate '  FTP protocol support' CONFIG_IP_NF_FTP $CONFIG_IP_NF_CONNTRACK
++  bool '  Connection mark tracking support' CONFIG_IP_NF_CONNTRACK_MARK
++  dep_tristate '  FTP protocol support' CONFIG_IP_NF_FTP $CONFIG_IP_NF_CONNTRACKa
+   dep_tristate '  Amanda protocol support' CONFIG_IP_NF_AMANDA $CONFIG_IP_NF_CONNTRACK
+   dep_tristate '  TFTP protocol support' CONFIG_IP_NF_TFTP $CONFIG_IP_NF_CONNTRACK
+   dep_tristate '  IRC protocol support' CONFIG_IP_NF_IRC $CONFIG_IP_NF_CONNTRACK
+@@ -42,6 +43,9 @@
+   if [ "$CONFIG_IP_NF_CONNTRACK" != "n" ]; then
+     dep_tristate '  Connection state match support' CONFIG_IP_NF_MATCH_STATE $CONFIG_IP_NF_CONNTRACK $CONFIG_IP_NF_IPTABLES 
+     dep_tristate '  Connection tracking match support' CONFIG_IP_NF_MATCH_CONNTRACK $CONFIG_IP_NF_CONNTRACK $CONFIG_IP_NF_IPTABLES 
++	if [ "$CONFIG_IP_NF_CONNTRACK_MARK" != "n" ]; then
++	  dep_tristate '  Connection mark match support' CONFIG_IP_NF_MATCH_CONNMARK $CONFIG_IP_NF_IPTABLES
++	fi
+   fi
+   if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+     dep_tristate '  Unclean match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_UNCLEAN $CONFIG_IP_NF_IPTABLES
+@@ -125,6 +129,9 @@
+  
+     dep_tristate '    MARK target support' CONFIG_IP_NF_TARGET_MARK $CONFIG_IP_NF_MANGLE
+   fi
++  if [ "$CONFIG_IP_NF_CONNTRACK_MARK" != "n" ]; then
++    dep_tristate '  CONNMARK target support' CONFIG_IP_NF_TARGET_CONNMARK $CONFIG_IP_NF_IPTABLES
++  fi
+   dep_tristate '  LOG target support' CONFIG_IP_NF_TARGET_LOG $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  TTL target support' CONFIG_IP_NF_TARGET_TTL $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  ULOG target support' CONFIG_IP_NF_TARGET_ULOG $CONFIG_IP_NF_IPTABLES
+diff -urN linux.old/net/ipv4/netfilter/Makefile linux.dev/net/ipv4/netfilter/Makefile
+--- linux.old/net/ipv4/netfilter/Makefile	2005-08-20 20:02:09.326416000 +0200
++++ linux.dev/net/ipv4/netfilter/Makefile	2005-08-20 20:29:54.081136232 +0200
+@@ -93,6 +93,7 @@
+ 
+ obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
+ obj-$(CONFIG_IP_NF_MATCH_STATE) += ipt_state.o
++obj-$(CONFIG_IP_NF_MATCH_CONNMARK) += ipt_connmark.o
+ obj-$(CONFIG_IP_NF_MATCH_CONNTRACK) += ipt_conntrack.o
+ obj-$(CONFIG_IP_NF_MATCH_UNCLEAN) += ipt_unclean.o
+ obj-$(CONFIG_IP_NF_MATCH_TCPMSS) += ipt_tcpmss.o
+@@ -110,6 +111,7 @@
+ obj-$(CONFIG_IP_NF_TARGET_REDIRECT) += ipt_REDIRECT.o
+ obj-$(CONFIG_IP_NF_NAT_SNMP_BASIC) += ip_nat_snmp_basic.o
+ obj-$(CONFIG_IP_NF_TARGET_LOG) += ipt_LOG.o
++obj-$(CONFIG_IP_NF_TARGET_CONNMARK) += ipt_CONNMARK.o
+ obj-$(CONFIG_IP_NF_TARGET_TTL) += ipt_TTL.o
+ obj-$(CONFIG_IP_NF_TARGET_ULOG) += ipt_ULOG.o
+ obj-$(CONFIG_IP_NF_TARGET_TCPMSS) += ipt_TCPMSS.o
+diff -urN linux.old/net/ipv4/netfilter/ip_conntrack_core.c linux.dev/net/ipv4/netfilter/ip_conntrack_core.c
+--- linux.old/net/ipv4/netfilter/ip_conntrack_core.c	2005-08-20 20:02:06.828795000 +0200
++++ linux.dev/net/ipv4/netfilter/ip_conntrack_core.c	2005-08-20 20:33:23.308328864 +0200
+@@ -755,6 +755,9 @@
+ 		__set_bit(IPS_EXPECTED_BIT, &conntrack->status);
+ 		conntrack->master = expected;
+ 		expected->sibling = conntrack;
++#ifdef CONFIG_IP_NF_CONNTRACK_MARK
++		conntrack->mark = expected->expectant->mark;
++#endif
+ 		LIST_DELETE(&ip_conntrack_expect_list, expected);
+ 		expected->expectant->expecting--;
+ 		nf_conntrack_get(&master_ct(conntrack)->infos[0]);
+diff -urN linux.old/net/ipv4/netfilter/ip_conntrack_standalone.c linux.dev/net/ipv4/netfilter/ip_conntrack_standalone.c
+--- linux.old/net/ipv4/netfilter/ip_conntrack_standalone.c	2005-08-20 20:02:06.583833000 +0200
++++ linux.dev/net/ipv4/netfilter/ip_conntrack_standalone.c	2005-08-20 20:32:15.364657872 +0200
+@@ -107,6 +107,9 @@
+ 		len += sprintf(buffer + len, "[ASSURED] ");
+ 	len += sprintf(buffer + len, "use=%u ",
+ 		       atomic_read(&conntrack->ct_general.use));
++	#if defined(CONFIG_IP_NF_CONNTRACK_MARK)
++	len += sprintf(buffer + len, "mark=%ld ", conntrack->mark);
++	#endif
+ 
+ 	#if defined(CONFIG_IP_NF_MATCH_LAYER7) || defined(CONFIG_IP_NF_MATCH_LAYER7_MODULE)
+ 	if(conntrack->layer7.app_proto)
+diff -urN linux.old/net/ipv4/netfilter/ipt_CONNMARK.c linux.dev/net/ipv4/netfilter/ipt_CONNMARK.c
+--- linux.old/net/ipv4/netfilter/ipt_CONNMARK.c	1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/net/ipv4/netfilter/ipt_CONNMARK.c	2005-08-20 20:21:28.666970864 +0200
+@@ -0,0 +1,118 @@
++/* This kernel module is used to modify the connection mark values, or
++ * to optionally restore the skb nfmark from the connection mark
++ *
++ * Copyright (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
++ * by Henrik Nordstrom <hno@marasystems.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
++ */
++#include <linux/module.h>
++#include <linux/skbuff.h>
++#include <linux/ip.h>
++#include <net/checksum.h>
++
++MODULE_AUTHOR("Henrik Nordstrom <hno@marasytems.com>");
++MODULE_DESCRIPTION("IP tables CONNMARK matching module");
++MODULE_LICENSE("GPL");
++
++#include <linux/netfilter_ipv4/ip_tables.h>
++#include <linux/netfilter_ipv4/ipt_CONNMARK.h>
++#include <linux/netfilter_ipv4/ip_conntrack.h>
++
++static unsigned int
++target(struct sk_buff **pskb,
++       unsigned int hooknum,
++       const struct net_device *in,
++       const struct net_device *out,
++       const void *targinfo,
++       void *userinfo)
++{
++	const struct ipt_connmark_target_info *markinfo = targinfo;
++	unsigned long diff;
++	unsigned long nfmark;
++	unsigned long newmark;
++
++	enum ip_conntrack_info ctinfo;
++	struct ip_conntrack *ct = ip_conntrack_get((*pskb), &ctinfo);
++	if (ct) {
++	    switch(markinfo->mode) {
++	    case IPT_CONNMARK_SET:
++		newmark = (ct->mark & ~markinfo->mask) | markinfo->mark;
++		if (newmark != ct->mark)
++		    ct->mark = newmark;
++		break;
++	    case IPT_CONNMARK_SAVE:
++		newmark = (ct->mark & ~markinfo->mask) | ((*pskb)->nfmark & markinfo->mask);
++		if (ct->mark != newmark)
++		    ct->mark = newmark;
++		break;
++	    case IPT_CONNMARK_RESTORE:
++		nfmark = (*pskb)->nfmark;
++		diff = (ct->mark ^ nfmark & markinfo->mask);
++		if (diff != 0) {
++		    (*pskb)->nfmark = nfmark ^ diff;
++		    (*pskb)->nfcache |= NFC_ALTERED;
++		}
++		break;
++	    }
++	}
++
++	return IPT_CONTINUE;
++}
++
++static int
++checkentry(const char *tablename,
++	   const struct ipt_entry *e,
++	   void *targinfo,
++	   unsigned int targinfosize,
++	   unsigned int hook_mask)
++{
++	struct ipt_connmark_target_info *matchinfo = targinfo;
++	if (targinfosize != IPT_ALIGN(sizeof(struct ipt_connmark_target_info))) {
++		printk(KERN_WARNING "CONNMARK: targinfosize %u != %Zu\n",
++		       targinfosize,
++		       IPT_ALIGN(sizeof(struct ipt_connmark_target_info)));
++		return 0;
++	}
++
++	if (matchinfo->mode == IPT_CONNMARK_RESTORE) {
++	    if (strcmp(tablename, "mangle") != 0) {
++		    printk(KERN_WARNING "CONNMARK: restore can only be called from \"mangle\" table, not \"%s\"\n", tablename);
++		    return 0;
++	    }
++	}
++
++	return 1;
++}
++
++static struct ipt_target ipt_connmark_reg = {
++	.name = "CONNMARK",
++	.target = &target,
++	.checkentry = &checkentry,
++	.me = THIS_MODULE
++};
++
++static int __init init(void)
++{
++	return ipt_register_target(&ipt_connmark_reg);
++}
++
++static void __exit fini(void)
++{
++	ipt_unregister_target(&ipt_connmark_reg);
++}
++
++module_init(init);
++module_exit(fini);
+diff -urN linux.old/net/ipv4/netfilter/ipt_connmark.c linux.dev/net/ipv4/netfilter/ipt_connmark.c
+--- linux.old/net/ipv4/netfilter/ipt_connmark.c	1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/net/ipv4/netfilter/ipt_connmark.c	2005-08-20 20:21:28.666970864 +0200
+@@ -0,0 +1,83 @@
++/* This kernel module matches connection mark values set by the
++ * CONNMARK target
++ *
++ * Copyright (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
++ * by Henrik Nordstrom <hno@marasystems.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
++ */
++
++#include <linux/module.h>
++#include <linux/skbuff.h>
++
++MODULE_AUTHOR("Henrik Nordstrom <hno@marasytems.com>");
++MODULE_DESCRIPTION("IP tables connmark match module");
++MODULE_LICENSE("GPL");
++
++#include <linux/netfilter_ipv4/ip_tables.h>
++#include <linux/netfilter_ipv4/ipt_connmark.h>
++#include <linux/netfilter_ipv4/ip_conntrack.h>
++
++static int
++match(const struct sk_buff *skb,
++      const struct net_device *in,
++      const struct net_device *out,
++      const void *matchinfo,
++      int offset,
++      const void *hdr,
++      u_int16_t datalen,
++      int *hotdrop)
++{
++	const struct ipt_connmark_info *info = matchinfo;
++	enum ip_conntrack_info ctinfo;
++	struct ip_conntrack *ct = ip_conntrack_get((struct sk_buff *)skb, &ctinfo);
++	if (!ct)
++	    return 0;
++
++	return ((ct->mark & info->mask) == info->mark) ^ info->invert;
++}
++
++static int
++checkentry(const char *tablename,
++	   const struct ipt_ip *ip,
++	   void *matchinfo,
++	   unsigned int matchsize,
++	   unsigned int hook_mask)
++{
++	if (matchsize != IPT_ALIGN(sizeof(struct ipt_connmark_info)))
++		return 0;
++
++	return 1;
++}
++
++static struct ipt_match connmark_match = {
++	.name = "connmark",
++	.match = &match,
++	.checkentry = &checkentry,
++	.me = THIS_MODULE
++};
++
++static int __init init(void)
++{
++	return ipt_register_match(&connmark_match);
++}
++
++static void __exit fini(void)
++{
++	ipt_unregister_match(&connmark_match);
++}
++
++module_init(init);
++module_exit(fini);
diff --git a/openwrt/target/linux/linux-2.4/patches/generic/608-netfilter_ipset.patch b/openwrt/target/linux/linux-2.4/patches/generic/608-netfilter_ipset.patch
new file mode 100644
index 0000000000..8cf5c694d0
--- /dev/null
+++ b/openwrt/target/linux/linux-2.4/patches/generic/608-netfilter_ipset.patch
@@ -0,0 +1,5725 @@
+diff -Naur linux-old/Documentation/Configure.help linux-new/Documentation/Configure.help
+--- linux-old/Documentation/Configure.help	2005-07-23 23:34:46.000000000 +0200
++++ linux-new/Documentation/Configure.help	2005-08-10 22:13:01.000000000 +0200
+@@ -3209,6 +3209,75 @@
+   If you want to compile it as a module, say M here and read
+   <file:Documentation/modules.txt>.  If unsure, say `N'.
+ 
++IP set support
++CONFIG_IP_NF_SET
++  This option adds IP set support to the kernel.
++
++  In order to define and use sets, you need userlevel utilities: an
++  iptables binary which knows about IP sets and the program ipset(8), 
++  by which you can define and setup the sets themselves. 
++
++  If you want to compile it as a module, say M here and read
++  <file:Documentation/modules.txt>.  If unsure, say `N'.
++
++set match support
++CONFIG_IP_NF_MATCH_SET
++  This option adds IP set match support.
++  You need the ipset utility to create and set up the sets.
++
++  If you want to compile it as a module, say M here and read
++  <file:Documentation/modules.txt>.  If unsure, say `N'.
++
++SET target support
++CONFIG_IP_NF_TARGET_SET
++  This option adds IP set target support.
++  You need the ipset utility to create and set up the sets.
++
++  If you want to compile it as a module, say M here and read
++  <file:Documentation/modules.txt>.  If unsure, say `N'.
++
++ipmap set type support
++CONFIG_IP_NF_SET_IPMAP
++  This option adds the ipmap set type support.
++
++  If you want to compile it as a module, say M here and read
++  <file:Documentation/modules.txt>.  If unsure, say `N'.
++
++macipmap set type support
++CONFIG_IP_NF_SET_MACIPMAP
++  This option adds the macipmap set type support.
++
++  If you want to compile it as a module, say M here and read
++  <file:Documentation/modules.txt>.  If unsure, say `N'.
++
++portmap set type support
++CONFIG_IP_NF_SET_PORTMAP
++  This option adds the portmap set type support.
++
++  If you want to compile it as a module, say M here and read
++  <file:Documentation/modules.txt>.  If unsure, say `N'.
++
++iphash set type support
++CONFIG_IP_NF_SET_IPHASH
++  This option adds the iphash set type support.
++
++  If you want to compile it as a module, say M here and read
++  <file:Documentation/modules.txt>.  If unsure, say `N'.
++
++nethash set type support
++CONFIG_IP_NF_SET_NETHASH
++  This option adds the nethash set type support.
++
++  If you want to compile it as a module, say M here and read
++  <file:Documentation/modules.txt>.  If unsure, say `N'.
++
++iptree set type support
++CONFIG_IP_NF_SET_IPTREE
++  This option adds the iptree set type support.
++
++  If you want to compile it as a module, say M here and read
++  <file:Documentation/modules.txt>.  If unsure, say `N'.
++
+ TTL target support
+ CONFIG_IP_NF_TARGET_TTL
+   This option adds a `TTL' target, which enables the user to set
+diff -Naur linux-old/include/linux/netfilter_ipv4/ip_set.h linux-new/include/linux/netfilter_ipv4/ip_set.h
+--- linux-old/include/linux/netfilter_ipv4/ip_set.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/include/linux/netfilter_ipv4/ip_set.h	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,489 @@
++#ifndef _IP_SET_H
++#define _IP_SET_H
++
++/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
++ *                         Patrick Schaaf <bof@bof.de>
++ *                         Martin Josefsson <gandalf@wlug.westbo.se>
++ * Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.  
++ */
++
++/*
++ * A sockopt of such quality has hardly ever been seen before on the open
++ * market!  This little beauty, hardly ever used: above 64, so it's
++ * traditionally used for firewalling, not touched (even once!) by the
++ * 2.0, 2.2 and 2.4 kernels!
++ *
++ * Comes with its own certificate of authenticity, valid anywhere in the
++ * Free world!
++ *
++ * Rusty, 19.4.2000
++ */
++#define SO_IP_SET 		83
++
++/*
++ * Heavily modify by Joakim Axelsson 08.03.2002
++ * - Made it more modulebased
++ *
++ * Additional heavy modifications by Jozsef Kadlecsik 22.02.2004
++ * - bindings added
++ * - in order to "deal with" backward compatibility, renamed to ipset
++ */
++
++/* 
++ * Used so that the kernel module and ipset-binary can match their versions 
++ */
++#define IP_SET_PROTOCOL_VERSION 2
++
++#define IP_SET_MAXNAMELEN 32	/* set names and set typenames */
++
++/* Lets work with our own typedef for representing an IP address.
++ * We hope to make the code more portable, possibly to IPv6...
++ *
++ * The representation works in HOST byte order, because most set types
++ * will perform arithmetic operations and compare operations.
++ * 
++ * For now the type is an uint32_t.
++ *
++ * Make sure to ONLY use the functions when translating and parsing
++ * in order to keep the host byte order and make it more portable:
++ *  parse_ip()
++ *  parse_mask()
++ *  parse_ipandmask()
++ *  ip_tostring()
++ * (Joakim: where are they???)
++ */
++
++typedef uint32_t ip_set_ip_t;
++
++/* Sets are identified by an id in kernel space. Tweak with ip_set_id_t
++ * and IP_SET_INVALID_ID if you want to increase the max number of sets.
++ */
++typedef uint16_t ip_set_id_t;
++
++#define IP_SET_INVALID_ID	65535
++
++/* How deep we follow bindings  */
++#define IP_SET_MAX_BINDINGS	6
++
++/*
++ * Option flags for kernel operations (ipt_set_info)
++ */
++#define IPSET_SRC 		0x01	/* Source match/add */
++#define IPSET_DST		0x02	/* Destination match/add */
++#define IPSET_MATCH_INV		0x04	/* Inverse matching */
++
++/*
++ * Set types (flavours)
++ */
++#define IPSET_TYPE_IP		0	/* IP address type of set */
++#define IPSET_TYPE_PORT		1	/* Port type of set */
++
++/* Reserved keywords */
++#define IPSET_TOKEN_DEFAULT	":default:"
++#define IPSET_TOKEN_ALL		":all:"
++
++/* SO_IP_SET operation constants, and their request struct types.
++ *
++ * Operation ids:
++ *	  0-99:	 commands with version checking
++ *	100-199: add/del/test/bind/unbind
++ *	200-299: list, save, restore
++ */
++
++/* Single shot operations: 
++ * version, create, destroy, flush, rename and swap 
++ *
++ * Sets are identified by name.
++ */
++
++#define IP_SET_REQ_STD		\
++	unsigned op;		\
++	unsigned version;	\
++	char name[IP_SET_MAXNAMELEN]
++
++#define IP_SET_OP_CREATE	0x00000001	/* Create a new (empty) set */
++struct ip_set_req_create {
++	IP_SET_REQ_STD;
++	char typename[IP_SET_MAXNAMELEN];
++};
++
++#define IP_SET_OP_DESTROY	0x00000002	/* Remove a (empty) set */
++struct ip_set_req_std {
++	IP_SET_REQ_STD;
++};
++
++#define IP_SET_OP_FLUSH		0x00000003	/* Remove all IPs in a set */
++/* Uses ip_set_req_std */
++
++#define IP_SET_OP_RENAME	0x00000004	/* Rename a set */
++/* Uses ip_set_req_create */
++
++#define IP_SET_OP_SWAP		0x00000005	/* Swap two sets */
++/* Uses ip_set_req_create */
++
++union ip_set_name_index {
++	char name[IP_SET_MAXNAMELEN];
++	ip_set_id_t index;
++};
++
++#define IP_SET_OP_GET_BYNAME	0x00000006	/* Get set index by name */
++struct ip_set_req_get_set {
++	unsigned op;
++	unsigned version;
++	union ip_set_name_index set;
++};
++
++#define IP_SET_OP_GET_BYINDEX	0x00000007	/* Get set name by index */
++/* Uses ip_set_req_get_set */
++
++#define IP_SET_OP_VERSION	0x00000100	/* Ask kernel version */
++struct ip_set_req_version {
++	unsigned op;
++	unsigned version;
++};
++
++/* Double shots operations: 
++ * add, del, test, bind and unbind.
++ *
++ * First we query the kernel to get the index and type of the target set,
++ * then issue the command. Validity of IP is checked in kernel in order
++ * to minimalize sockopt operations.
++ */
++
++/* Get minimal set data for add/del/test/bind/unbind IP */
++#define IP_SET_OP_ADT_GET	0x00000010	/* Get set and type */
++struct ip_set_req_adt_get {
++	unsigned op;
++	unsigned version;
++	union ip_set_name_index set;
++	char typename[IP_SET_MAXNAMELEN];
++};
++
++#define IP_SET_REQ_BYINDEX	\
++	unsigned op;		\
++	ip_set_id_t index;
++
++struct ip_set_req_adt {
++	IP_SET_REQ_BYINDEX;
++};
++
++#define IP_SET_OP_ADD_IP	0x00000101	/* Add an IP to a set */
++/* Uses ip_set_req_adt, with type specific addage */
++
++#define IP_SET_OP_DEL_IP	0x00000102	/* Remove an IP from a set */
++/* Uses ip_set_req_adt, with type specific addage */
++
++#define IP_SET_OP_TEST_IP	0x00000103	/* Test an IP in a set */
++/* Uses ip_set_req_adt, with type specific addage */
++
++#define IP_SET_OP_BIND_SET	0x00000104	/* Bind an IP to a set */
++/* Uses ip_set_req_bind, with type specific addage */
++struct ip_set_req_bind {
++	IP_SET_REQ_BYINDEX;
++	char binding[IP_SET_MAXNAMELEN];
++};
++
++#define IP_SET_OP_UNBIND_SET	0x00000105	/* Unbind an IP from a set */
++/* Uses ip_set_req_bind, with type speficic addage 
++ * index = 0 means unbinding for all sets */
++
++#define IP_SET_OP_TEST_BIND_SET	0x00000106	/* Test binding an IP to a set */
++/* Uses ip_set_req_bind, with type specific addage */
++
++/* Multiple shots operations: list, save, restore.
++ *
++ * - check kernel version and query the max number of sets
++ * - get the basic information on all sets
++ *   and size required for the next step
++ * - get actual set data: header, data, bindings
++ */
++
++/* Get max_sets and the index of a queried set
++ */
++#define IP_SET_OP_MAX_SETS	0x00000020
++struct ip_set_req_max_sets {
++	unsigned op;
++	unsigned version;
++	ip_set_id_t max_sets;		/* max_sets */
++	ip_set_id_t sets;		/* real number of sets */
++	union ip_set_name_index set;	/* index of set if name used */
++};
++
++/* Get the id and name of the sets plus size for next step */
++#define IP_SET_OP_LIST_SIZE	0x00000201
++#define IP_SET_OP_SAVE_SIZE	0x00000202
++struct ip_set_req_setnames {
++	unsigned op;
++	ip_set_id_t index;		/* set to list/save */
++	size_t size;			/* size to get setdata/bindings */
++	/* followed by sets number of struct ip_set_name_list */
++};
++
++struct ip_set_name_list {
++	char name[IP_SET_MAXNAMELEN];
++	char typename[IP_SET_MAXNAMELEN];
++	ip_set_id_t index;
++	ip_set_id_t id;
++};
++
++/* The actual list operation */
++#define IP_SET_OP_LIST		0x00000203
++struct ip_set_req_list {
++	IP_SET_REQ_BYINDEX;
++	/* sets number of struct ip_set_list in reply */ 
++};
++
++struct ip_set_list {
++	ip_set_id_t index;
++	ip_set_id_t binding;
++	u_int32_t ref;
++	size_t header_size;	/* Set header data of header_size */
++	size_t members_size;	/* Set members data of members_size */
++	size_t bindings_size;	/* Set bindings data of bindings_size */
++};
++
++struct ip_set_hash_list {
++	ip_set_ip_t ip;
++	ip_set_id_t binding;
++};
++
++/* The save operation */
++#define IP_SET_OP_SAVE		0x00000204
++/* Uses ip_set_req_list, in the reply replaced by
++ * sets number of struct ip_set_save plus a marker
++ * ip_set_save followed by ip_set_hash_save structures.
++ */
++struct ip_set_save {
++	ip_set_id_t index;
++	ip_set_id_t binding;
++	size_t header_size;	/* Set header data of header_size */
++	size_t members_size;	/* Set members data of members_size */
++};
++
++/* At restoring, ip == 0 means default binding for the given set: */
++struct ip_set_hash_save {
++	ip_set_ip_t ip;
++	ip_set_id_t id;
++	ip_set_id_t binding;
++};
++
++/* The restore operation */
++#define IP_SET_OP_RESTORE	0x00000205
++/* Uses ip_set_req_setnames followed by ip_set_restore structures
++ * plus a marker ip_set_restore, followed by ip_set_hash_save 
++ * structures.
++ */
++struct ip_set_restore {
++	char name[IP_SET_MAXNAMELEN];
++	char typename[IP_SET_MAXNAMELEN];
++	ip_set_id_t index;
++	size_t header_size;	/* Create data of header_size */
++	size_t members_size;	/* Set members data of members_size */
++};
++
++static inline int bitmap_bytes(ip_set_ip_t a, ip_set_ip_t b)
++{
++	return 4 * ((((b - a + 8) / 8) + 3) / 4);
++}
++
++#ifdef __KERNEL__
++
++#define ip_set_printk(format, args...) 			\
++	do {							\
++		printk("%s: %s: ", __FILE__, __FUNCTION__);	\
++		printk(format "\n" , ## args);			\
++	} while (0)
++
++#if defined(IP_SET_DEBUG)
++#define DP(format, args...) 					\
++	do {							\
++		printk("%s: %s (DBG): ", __FILE__, __FUNCTION__);\
++		printk(format "\n" , ## args);			\
++	} while (0)
++#define IP_SET_ASSERT(x)					\
++	do {							\
++		if (!(x))					\
++			printk("IP_SET_ASSERT: %s:%i(%s)\n",	\
++				__FILE__, __LINE__, __FUNCTION__); \
++	} while (0)
++#else
++#define DP(format, args...)
++#define IP_SET_ASSERT(x)
++#endif
++
++struct ip_set;
++
++/*
++ * The ip_set_type definition - one per set type, e.g. "ipmap".
++ *
++ * Each individual set has a pointer, set->type, going to one
++ * of these structures. Function pointers inside the structure implement
++ * the real behaviour of the sets.
++ *
++ * If not mentioned differently, the implementation behind the function
++ * pointers of a set_type, is expected to return 0 if ok, and a negative
++ * errno (e.g. -EINVAL) on error.
++ */
++struct ip_set_type {
++	struct list_head list;	/* next in list of set types */
++
++	/* test for IP in set (kernel: iptables -m set src|dst)
++	 * return 0 if not in set, 1 if in set.
++	 */
++	int (*testip_kernel) (struct ip_set *set,
++			      const struct sk_buff * skb, 
++			      u_int32_t flags,
++			      ip_set_ip_t *ip);
++
++	/* test for IP in set (userspace: ipset -T set IP)
++	 * return 0 if not in set, 1 if in set.
++	 */
++	int (*testip) (struct ip_set *set,
++		       const void *data, size_t size,
++		       ip_set_ip_t *ip);
++
++	/*
++	 * Size of the data structure passed by when
++	 * adding/deletin/testing an entry.
++	 */
++	size_t reqsize;
++
++	/* Add IP into set (userspace: ipset -A set IP)
++	 * Return -EEXIST if the address is already in the set,
++	 * and -ERANGE if the address lies outside the set bounds.
++	 * If the address was not already in the set, 0 is returned.
++	 */
++	int (*addip) (struct ip_set *set, 
++		      const void *data, size_t size,
++		      ip_set_ip_t *ip);
++
++	/* Add IP into set (kernel: iptables ... -j SET set src|dst)
++	 * Return -EEXIST if the address is already in the set,
++	 * and -ERANGE if the address lies outside the set bounds.
++	 * If the address was not already in the set, 0 is returned.
++	 */
++	int (*addip_kernel) (struct ip_set *set,
++			     const struct sk_buff * skb, 
++			     u_int32_t flags,
++			     ip_set_ip_t *ip);
++
++	/* remove IP from set (userspace: ipset -D set --entry x)
++	 * Return -EEXIST if the address is NOT in the set,
++	 * and -ERANGE if the address lies outside the set bounds.
++	 * If the address really was in the set, 0 is returned.
++	 */
++	int (*delip) (struct ip_set *set, 
++		      const void *data, size_t size,
++		      ip_set_ip_t *ip);
++
++	/* remove IP from set (kernel: iptables ... -j SET --entry x)
++	 * Return -EEXIST if the address is NOT in the set,
++	 * and -ERANGE if the address lies outside the set bounds.
++	 * If the address really was in the set, 0 is returned.
++	 */
++	int (*delip_kernel) (struct ip_set *set,
++			     const struct sk_buff * skb, 
++			     u_int32_t flags,
++			     ip_set_ip_t *ip);
++
++	/* new set creation - allocated type specific items
++	 */
++	int (*create) (struct ip_set *set,
++		       const void *data, size_t size);
++
++	/* retry the operation after successfully tweaking the set
++	 */
++	int (*retry) (struct ip_set *set);
++
++	/* set destruction - free type specific items
++	 * There is no return value.
++	 * Can be called only when child sets are destroyed.
++	 */
++	void (*destroy) (struct ip_set *set);
++
++	/* set flushing - reset all bits in the set, or something similar.
++	 * There is no return value.
++	 */
++	void (*flush) (struct ip_set *set);
++
++	/* Listing: size needed for header
++	 */
++	size_t header_size;
++
++	/* Listing: Get the header
++	 *
++	 * Fill in the information in "data".
++	 * This function is always run after list_header_size() under a 
++	 * writelock on the set. Therefor is the length of "data" always 
++	 * correct. 
++	 */
++	void (*list_header) (const struct ip_set *set, 
++			     void *data);
++
++	/* Listing: Get the size for the set members
++	 */
++	int (*list_members_size) (const struct ip_set *set);
++
++	/* Listing: Get the set members
++	 *
++	 * Fill in the information in "data".
++	 * This function is always run after list_member_size() under a 
++	 * writelock on the set. Therefor is the length of "data" always 
++	 * correct. 
++	 */
++	void (*list_members) (const struct ip_set *set,
++			      void *data);
++
++	char typename[IP_SET_MAXNAMELEN];
++	char typecode;
++	int protocol_version;
++
++	/* Set this to THIS_MODULE if you are a module, otherwise NULL */
++	struct module *me;
++};
++
++extern int ip_set_register_set_type(struct ip_set_type *set_type);
++extern void ip_set_unregister_set_type(struct ip_set_type *set_type);
++
++/* A generic ipset */
++struct ip_set {
++	char name[IP_SET_MAXNAMELEN];	/* the name of the set */
++	rwlock_t lock;			/* lock for concurrency control */
++	ip_set_id_t id;			/* set id for swapping */
++	ip_set_id_t binding;		/* default binding for the set */
++	atomic_t ref;			/* in kernel and in hash references */
++	struct ip_set_type *type; 	/* the set types */
++	void *data;			/* pooltype specific data */
++};
++
++/* Structure to bind set elements to sets */
++struct ip_set_hash {
++	struct list_head list;		/* list of clashing entries in hash */
++	ip_set_ip_t ip;			/* ip from set */
++	ip_set_id_t id;			/* set id */
++	ip_set_id_t binding;		/* set we bind the element to */
++};
++
++/* register and unregister set references */
++extern ip_set_id_t ip_set_get_byname(const char name[IP_SET_MAXNAMELEN]);
++extern ip_set_id_t ip_set_get_byindex(ip_set_id_t id);
++extern void ip_set_put(ip_set_id_t id);
++
++/* API for iptables set match, and SET target */
++extern void ip_set_addip_kernel(ip_set_id_t id,
++				const struct sk_buff *skb,
++				const u_int32_t *flags);
++extern void ip_set_delip_kernel(ip_set_id_t id,
++				const struct sk_buff *skb,
++				const u_int32_t *flags);
++extern int ip_set_testip_kernel(ip_set_id_t id,
++				const struct sk_buff *skb,
++				const u_int32_t *flags);
++
++#endif				/* __KERNEL__ */
++
++#endif /*_IP_SET_H*/
+diff -Naur linux-old/include/linux/netfilter_ipv4/ip_set_iphash.h linux-new/include/linux/netfilter_ipv4/ip_set_iphash.h
+--- linux-old/include/linux/netfilter_ipv4/ip_set_iphash.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/include/linux/netfilter_ipv4/ip_set_iphash.h	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,30 @@
++#ifndef __IP_SET_IPHASH_H
++#define __IP_SET_IPHASH_H
++
++#include <linux/netfilter_ipv4/ip_set.h>
++
++#define SETTYPE_NAME "iphash"
++#define MAX_RANGE 0x0000FFFF
++
++struct ip_set_iphash {
++	ip_set_ip_t *members;		/* the iphash proper */
++	uint32_t initval;		/* initval for jhash_1word */
++	uint32_t prime;			/* prime for double hashing */
++	uint32_t hashsize;		/* hash size */
++	uint16_t probes;		/* max number of probes  */
++	uint16_t resize;		/* resize factor in percent */
++	ip_set_ip_t netmask;		/* netmask */
++};
++
++struct ip_set_req_iphash_create {
++	uint32_t hashsize;
++	uint16_t probes;
++	uint16_t resize;
++	ip_set_ip_t netmask;
++};
++
++struct ip_set_req_iphash {
++	ip_set_ip_t ip;
++};
++
++#endif	/* __IP_SET_IPHASH_H */
+diff -Naur linux-old/include/linux/netfilter_ipv4/ip_set_ipmap.h linux-new/include/linux/netfilter_ipv4/ip_set_ipmap.h
+--- linux-old/include/linux/netfilter_ipv4/ip_set_ipmap.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/include/linux/netfilter_ipv4/ip_set_ipmap.h	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,56 @@
++#ifndef __IP_SET_IPMAP_H
++#define __IP_SET_IPMAP_H
++
++#include <linux/netfilter_ipv4/ip_set.h>
++
++#define SETTYPE_NAME "ipmap"
++#define MAX_RANGE 0x0000FFFF
++
++struct ip_set_ipmap {
++	void *members;			/* the ipmap proper */
++	ip_set_ip_t first_ip;		/* host byte order, included in range */
++	ip_set_ip_t last_ip;		/* host byte order, included in range */
++	ip_set_ip_t netmask;		/* subnet netmask */
++	ip_set_ip_t sizeid;		/* size of set in IPs */
++	u_int16_t hosts;		/* number of hosts in a subnet */
++};
++
++struct ip_set_req_ipmap_create {
++	ip_set_ip_t from;
++	ip_set_ip_t to;
++	ip_set_ip_t netmask;
++};
++
++struct ip_set_req_ipmap {
++	ip_set_ip_t ip;
++};
++
++unsigned int
++mask_to_bits(ip_set_ip_t mask)
++{
++	unsigned int bits = 32;
++	ip_set_ip_t maskaddr;
++	
++	if (mask == 0xFFFFFFFF)
++		return bits;
++	
++	maskaddr = 0xFFFFFFFE;
++	while (--bits >= 0 && maskaddr != mask)
++		maskaddr <<= 1;
++	
++	return bits;
++}
++
++ip_set_ip_t
++range_to_mask(ip_set_ip_t from, ip_set_ip_t to, unsigned int *bits)
++{
++	ip_set_ip_t mask = 0xFFFFFFFE;
++	
++	*bits = 32;
++	while (--(*bits) >= 0 && mask && (to & mask) != from)
++		mask <<= 1;
++		
++	return mask;
++}
++	
++#endif /* __IP_SET_IPMAP_H */
+diff -Naur linux-old/include/linux/netfilter_ipv4/ip_set_iptree.h linux-new/include/linux/netfilter_ipv4/ip_set_iptree.h
+--- linux-old/include/linux/netfilter_ipv4/ip_set_iptree.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/include/linux/netfilter_ipv4/ip_set_iptree.h	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,39 @@
++#ifndef __IP_SET_IPTREE_H
++#define __IP_SET_IPTREE_H
++
++#include <linux/netfilter_ipv4/ip_set.h>
++
++#define SETTYPE_NAME "iptree"
++#define MAX_RANGE 0x0000FFFF
++
++struct ip_set_iptreed {
++	unsigned long expires[255];	   	/* x.x.x.ADDR */
++};
++
++struct ip_set_iptreec {
++	struct ip_set_iptreed *tree[255];	/* x.x.ADDR.* */
++};
++
++struct ip_set_iptreeb {
++	struct ip_set_iptreec *tree[255];	/* x.ADDR.*.* */
++};
++
++struct ip_set_iptree {
++	unsigned int timeout;
++	unsigned int gc_interval;
++#ifdef __KERNEL__
++	struct timer_list gc;
++	struct ip_set_iptreeb *tree[255];	/* ADDR.*.*.* */
++#endif
++};
++
++struct ip_set_req_iptree_create {
++	unsigned int timeout;
++};
++
++struct ip_set_req_iptree {
++	ip_set_ip_t ip;
++	unsigned int timeout;
++};
++
++#endif	/* __IP_SET_IPTREE_H */
+diff -Naur linux-old/include/linux/netfilter_ipv4/ip_set_jhash.h linux-new/include/linux/netfilter_ipv4/ip_set_jhash.h
+--- linux-old/include/linux/netfilter_ipv4/ip_set_jhash.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/include/linux/netfilter_ipv4/ip_set_jhash.h	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,148 @@
++#ifndef _LINUX_IPSET_JHASH_H
++#define _LINUX_IPSET_JHASH_H
++
++/* This is a copy of linux/jhash.h but the types u32/u8 are changed
++ * to __u32/__u8 so that the header file can be included into
++ * userspace code as well. Jozsef Kadlecsik (kadlec@blackhole.kfki.hu)
++ */
++
++/* jhash.h: Jenkins hash support.
++ *
++ * Copyright (C) 1996 Bob Jenkins (bob_jenkins@burtleburtle.net)
++ *
++ * http://burtleburtle.net/bob/hash/
++ *
++ * These are the credits from Bob's sources:
++ *
++ * lookup2.c, by Bob Jenkins, December 1996, Public Domain.
++ * hash(), hash2(), hash3, and mix() are externally useful functions.
++ * Routines to test the hash are included if SELF_TEST is defined.
++ * You can use this free for any purpose.  It has no warranty.
++ *
++ * Copyright (C) 2003 David S. Miller (davem@redhat.com)
++ *
++ * I've modified Bob's hash to be useful in the Linux kernel, and
++ * any bugs present are surely my fault.  -DaveM
++ */
++
++/* NOTE: Arguments are modified. */
++#define __jhash_mix(a, b, c) \
++{ \
++  a -= b; a -= c; a ^= (c>>13); \
++  b -= c; b -= a; b ^= (a<<8); \
++  c -= a; c -= b; c ^= (b>>13); \
++  a -= b; a -= c; a ^= (c>>12);  \
++  b -= c; b -= a; b ^= (a<<16); \
++  c -= a; c -= b; c ^= (b>>5); \
++  a -= b; a -= c; a ^= (c>>3);  \
++  b -= c; b -= a; b ^= (a<<10); \
++  c -= a; c -= b; c ^= (b>>15); \
++}
++
++/* The golden ration: an arbitrary value */
++#define JHASH_GOLDEN_RATIO	0x9e3779b9
++
++/* The most generic version, hashes an arbitrary sequence
++ * of bytes.  No alignment or length assumptions are made about
++ * the input key.
++ */
++static inline __u32 jhash(void *key, __u32 length, __u32 initval)
++{
++	__u32 a, b, c, len;
++	__u8 *k = key;
++
++	len = length;
++	a = b = JHASH_GOLDEN_RATIO;
++	c = initval;
++
++	while (len >= 12) {
++		a += (k[0] +((__u32)k[1]<<8) +((__u32)k[2]<<16) +((__u32)k[3]<<24));
++		b += (k[4] +((__u32)k[5]<<8) +((__u32)k[6]<<16) +((__u32)k[7]<<24));
++		c += (k[8] +((__u32)k[9]<<8) +((__u32)k[10]<<16)+((__u32)k[11]<<24));
++
++		__jhash_mix(a,b,c);
++
++		k += 12;
++		len -= 12;
++	}
++
++	c += length;
++	switch (len) {
++	case 11: c += ((__u32)k[10]<<24);
++	case 10: c += ((__u32)k[9]<<16);
++	case 9 : c += ((__u32)k[8]<<8);
++	case 8 : b += ((__u32)k[7]<<24);
++	case 7 : b += ((__u32)k[6]<<16);
++	case 6 : b += ((__u32)k[5]<<8);
++	case 5 : b += k[4];
++	case 4 : a += ((__u32)k[3]<<24);
++	case 3 : a += ((__u32)k[2]<<16);
++	case 2 : a += ((__u32)k[1]<<8);
++	case 1 : a += k[0];
++	};
++
++	__jhash_mix(a,b,c);
++
++	return c;
++}
++
++/* A special optimized version that handles 1 or more of __u32s.
++ * The length parameter here is the number of __u32s in the key.
++ */
++static inline __u32 jhash2(__u32 *k, __u32 length, __u32 initval)
++{
++	__u32 a, b, c, len;
++
++	a = b = JHASH_GOLDEN_RATIO;
++	c = initval;
++	len = length;
++
++	while (len >= 3) {
++		a += k[0];
++		b += k[1];
++		c += k[2];
++		__jhash_mix(a, b, c);
++		k += 3; len -= 3;
++	}
++
++	c += length * 4;
++
++	switch (len) {
++	case 2 : b += k[1];
++	case 1 : a += k[0];
++	};
++
++	__jhash_mix(a,b,c);
++
++	return c;
++}
++
++
++/* A special ultra-optimized versions that knows they are hashing exactly
++ * 3, 2 or 1 word(s).
++ *
++ * NOTE: In partilar the "c += length; __jhash_mix(a,b,c);" normally
++ *       done at the end is not done here.
++ */
++static inline __u32 jhash_3words(__u32 a, __u32 b, __u32 c, __u32 initval)
++{
++	a += JHASH_GOLDEN_RATIO;
++	b += JHASH_GOLDEN_RATIO;
++	c += initval;
++
++	__jhash_mix(a, b, c);
++
++	return c;
++}
++
++static inline __u32 jhash_2words(__u32 a, __u32 b, __u32 initval)
++{
++	return jhash_3words(a, b, 0, initval);
++}
++
++static inline __u32 jhash_1word(__u32 a, __u32 initval)
++{
++	return jhash_3words(a, 0, 0, initval);
++}
++
++#endif /* _LINUX_IPSET_JHASH_H */
+diff -Naur linux-old/include/linux/netfilter_ipv4/ip_set_macipmap.h linux-new/include/linux/netfilter_ipv4/ip_set_macipmap.h
+--- linux-old/include/linux/netfilter_ipv4/ip_set_macipmap.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/include/linux/netfilter_ipv4/ip_set_macipmap.h	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,38 @@
++#ifndef __IP_SET_MACIPMAP_H
++#define __IP_SET_MACIPMAP_H
++
++#include <linux/netfilter_ipv4/ip_set.h>
++
++#define SETTYPE_NAME "macipmap"
++#define MAX_RANGE 0x0000FFFF
++
++/* general flags */
++#define IPSET_MACIP_MATCHUNSET	1
++
++/* per ip flags */
++#define IPSET_MACIP_ISSET	1
++
++struct ip_set_macipmap {
++	void *members;			/* the macipmap proper */
++	ip_set_ip_t first_ip;		/* host byte order, included in range */
++	ip_set_ip_t last_ip;		/* host byte order, included in range */
++	u_int32_t flags;
++};
++
++struct ip_set_req_macipmap_create {
++	ip_set_ip_t from;
++	ip_set_ip_t to;
++	u_int32_t flags;
++};
++
++struct ip_set_req_macipmap {
++	ip_set_ip_t ip;
++	unsigned char ethernet[ETH_ALEN];
++};
++
++struct ip_set_macip {
++	unsigned short flags;
++	unsigned char ethernet[ETH_ALEN];
++};
++
++#endif	/* __IP_SET_MACIPMAP_H */
+diff -Naur linux-old/include/linux/netfilter_ipv4/ip_set_malloc.h linux-new/include/linux/netfilter_ipv4/ip_set_malloc.h
+--- linux-old/include/linux/netfilter_ipv4/ip_set_malloc.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/include/linux/netfilter_ipv4/ip_set_malloc.h	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,27 @@
++#ifndef _IP_SET_MALLOC_H
++#define _IP_SET_MALLOC_H
++
++#ifdef __KERNEL__
++
++/* Memory allocation and deallocation */
++static size_t max_malloc_size = 131072;		/* Guaranteed: slab.c */
++
++static inline void * ip_set_malloc(size_t bytes)
++{
++	if (bytes > max_malloc_size)
++		return vmalloc(bytes);
++	else
++		return kmalloc(bytes, GFP_KERNEL);
++}
++
++static inline void ip_set_free(void * data, size_t bytes)
++{
++	if (bytes > max_malloc_size)
++		vfree(data);
++	else
++		kfree(data);
++}
++
++#endif				/* __KERNEL__ */
++
++#endif /*_IP_SET_MALLOC_H*/
+diff -Naur linux-old/include/linux/netfilter_ipv4/ip_set_nethash.h linux-new/include/linux/netfilter_ipv4/ip_set_nethash.h
+--- linux-old/include/linux/netfilter_ipv4/ip_set_nethash.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/include/linux/netfilter_ipv4/ip_set_nethash.h	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,55 @@
++#ifndef __IP_SET_NETHASH_H
++#define __IP_SET_NETHASH_H
++
++#include <linux/netfilter_ipv4/ip_set.h>
++
++#define SETTYPE_NAME "nethash"
++#define MAX_RANGE 0x0000FFFF
++
++struct ip_set_nethash {
++	ip_set_ip_t *members;		/* the nethash proper */
++	uint32_t initval;		/* initval for jhash_1word */
++	uint32_t prime;			/* prime for double hashing */
++	uint32_t hashsize;		/* hash size */
++	uint16_t probes;		/* max number of probes  */
++	uint16_t resize;		/* resize factor in percent */
++	unsigned char cidr[30];		/* CIDR sizes */
++};
++
++struct ip_set_req_nethash_create {
++	uint32_t hashsize;
++	uint16_t probes;
++	uint16_t resize;
++};
++
++struct ip_set_req_nethash {
++	ip_set_ip_t ip;
++	unsigned char cidr;
++};
++
++static unsigned char shifts[] = {255, 253, 249, 241, 225, 193, 129, 1};
++
++static inline ip_set_ip_t 
++pack(ip_set_ip_t ip, unsigned char cidr)
++{
++	ip_set_ip_t addr, *paddr = &addr;
++	unsigned char n, t, *a;
++
++	addr = htonl(ip & (0xFFFFFFFF << (32 - (cidr))));
++#ifdef __KERNEL__
++	DP("ip:%u.%u.%u.%u/%u", NIPQUAD(addr), cidr);
++#endif
++	n = cidr / 8;
++	t = cidr % 8;	
++	a = &((unsigned char *)paddr)[n];
++	*a = *a /(1 << (8 - t)) + shifts[t];
++#ifdef __KERNEL__
++	DP("n: %u, t: %u, a: %u", n, t, *a);
++	DP("ip:%u.%u.%u.%u/%u, %u.%u.%u.%u",
++	   HIPQUAD(ip), cidr, NIPQUAD(addr));
++#endif
++
++	return ntohl(addr);
++}
++
++#endif	/* __IP_SET_NETHASH_H */
+diff -Naur linux-old/include/linux/netfilter_ipv4/ip_set_portmap.h linux-new/include/linux/netfilter_ipv4/ip_set_portmap.h
+--- linux-old/include/linux/netfilter_ipv4/ip_set_portmap.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/include/linux/netfilter_ipv4/ip_set_portmap.h	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,25 @@
++#ifndef __IP_SET_PORTMAP_H
++#define __IP_SET_PORTMAP_H
++
++#include <linux/netfilter_ipv4/ip_set.h>
++
++#define SETTYPE_NAME	"portmap"
++#define MAX_RANGE	0x0000FFFF
++#define INVALID_PORT	(MAX_RANGE + 1)
++
++struct ip_set_portmap {
++	void *members;			/* the portmap proper */
++	ip_set_ip_t first_port;		/* host byte order, included in range */
++	ip_set_ip_t last_port;		/* host byte order, included in range */
++};
++
++struct ip_set_req_portmap_create {
++	ip_set_ip_t from;
++	ip_set_ip_t to;
++};
++
++struct ip_set_req_portmap {
++	ip_set_ip_t port;
++};
++
++#endif /* __IP_SET_PORTMAP_H */
+diff -Naur linux-old/include/linux/netfilter_ipv4/ip_set_prime.h linux-new/include/linux/netfilter_ipv4/ip_set_prime.h
+--- linux-old/include/linux/netfilter_ipv4/ip_set_prime.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/include/linux/netfilter_ipv4/ip_set_prime.h	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,34 @@
++#ifndef __IP_SET_PRIME_H
++#define __IP_SET_PRIME_H
++
++static inline unsigned make_prime_bound(unsigned nr)
++{
++	unsigned long long nr64 = nr;
++	unsigned long long x = 1;
++	nr = 1;
++	while (x <= nr64) { x <<= 2; nr <<= 1; }
++	return nr;
++}
++
++static inline int make_prime_check(unsigned nr)
++{
++	unsigned x = 3;
++	unsigned b = make_prime_bound(nr);
++	while (x <= b) {
++		if (0 == (nr % x)) return 0;
++		x += 2;
++	}
++	return 1;
++}
++
++static unsigned make_prime(unsigned nr)
++{
++	if (0 == (nr & 1)) nr--;
++	while (nr > 1) {
++		if (make_prime_check(nr)) return nr;
++		nr -= 2;
++	}
++	return 2;
++}
++
++#endif /* __IP_SET_PRIME_H */
+diff -Naur linux-old/include/linux/netfilter_ipv4/ipt_set.h linux-new/include/linux/netfilter_ipv4/ipt_set.h
+--- linux-old/include/linux/netfilter_ipv4/ipt_set.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/include/linux/netfilter_ipv4/ipt_set.h	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,21 @@
++#ifndef _IPT_SET_H
++#define _IPT_SET_H
++
++#include <linux/netfilter_ipv4/ip_set.h>
++
++struct ipt_set_info {
++	ip_set_id_t index;
++	u_int32_t flags[IP_SET_MAX_BINDINGS + 1];
++};
++
++/* match info */
++struct ipt_set_info_match {
++	struct ipt_set_info match_set;
++};
++
++struct ipt_set_info_target {
++	struct ipt_set_info add_set;
++	struct ipt_set_info del_set;
++};
++
++#endif /*_IPT_SET_H*/
+diff -Naur linux-old/net/ipv4/netfilter/Config.in linux-new/net/ipv4/netfilter/Config.in
+--- linux-old/net/ipv4/netfilter/Config.in	2005-07-23 23:34:46.000000000 +0200
++++ linux-new/net/ipv4/netfilter/Config.in	2005-08-10 22:13:01.000000000 +0200
+@@ -21,6 +21,20 @@
+ if [ "$CONFIG_IP_NF_IPTABLES" != "n" ]; then
+ # The simple matches.
+   dep_tristate '  limit match support' CONFIG_IP_NF_MATCH_LIMIT $CONFIG_IP_NF_IPTABLES
++
++  dep_tristate '  IP set support' CONFIG_IP_NF_SET $CONFIG_IP_NF_IPTABLES
++  if [ "$CONFIG_IP_NF_SET" != "n" ]; then
++    int '     Maximum number of sets' CONFIG_IP_NF_SET_MAX 256
++    int '     Hash size for bindings of IP sets' CONFIG_IP_NF_SET_HASHSIZE 1024
++    dep_tristate '    set match support' CONFIG_IP_NF_MATCH_SET $CONFIG_IP_NF_SET
++    dep_tristate '    SET target support' CONFIG_IP_NF_TARGET_SET $CONFIG_IP_NF_SET
++    dep_tristate '    ipmap set type support' CONFIG_IP_NF_SET_IPMAP $CONFIG_IP_NF_SET
++    dep_tristate '    portmap set type support' CONFIG_IP_NF_SET_PORTMAP $CONFIG_IP_NF_SET
++    dep_tristate '    macipmap set type support' CONFIG_IP_NF_SET_MACIPMAP $CONFIG_IP_NF_SET
++    dep_tristate '    iphash set type support' CONFIG_IP_NF_SET_IPHASH $CONFIG_IP_NF_SET
++    dep_tristate '    nethash set type support' CONFIG_IP_NF_SET_NETHASH $CONFIG_IP_NF_SET
++    dep_tristate '    iptree set type support' CONFIG_IP_NF_SET_IPTREE $CONFIG_IP_NF_SET
++  fi
+   dep_tristate '  MAC address match support' CONFIG_IP_NF_MATCH_MAC $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  Packet type match support' CONFIG_IP_NF_MATCH_PKTTYPE $CONFIG_IP_NF_IPTABLES
+   dep_tristate '  netfilter MARK match support' CONFIG_IP_NF_MATCH_MARK $CONFIG_IP_NF_IPTABLES
+diff -Naur linux-old/net/ipv4/netfilter/ip_set.c linux-new/net/ipv4/netfilter/ip_set.c
+--- linux-old/net/ipv4/netfilter/ip_set.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/net/ipv4/netfilter/ip_set.c	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,2002 @@
++/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
++ *                         Patrick Schaaf <bof@bof.de>
++ * Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.  
++ */
++
++/* Kernel module for IP set management */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/kmod.h>
++#include <linux/ip.h>
++#include <linux/skbuff.h>
++#include <linux/random.h>
++#include <linux/jhash.h>
++#include <linux/netfilter_ipv4/ip_tables.h>
++#include <linux/errno.h>
++#include <asm/uaccess.h>
++#include <asm/bitops.h>
++#include <asm/softirq.h>
++#include <asm/semaphore.h>
++#include <linux/spinlock.h>
++#include <linux/vmalloc.h>
++
++#define ASSERT_READ_LOCK(x)	/* dont use that */
++#define ASSERT_WRITE_LOCK(x)
++#include <linux/netfilter_ipv4/listhelp.h>
++#include <linux/netfilter_ipv4/ip_set.h>
++
++static struct list_head set_type_list;		/* all registered sets */
++static struct ip_set **ip_set_list;		/* all individual sets */
++static DECLARE_RWLOCK(ip_set_lock);		/* protects the lists and the hash */
++static DECLARE_MUTEX(ip_set_app_mutex);		/* serializes user access */
++static ip_set_id_t ip_set_max = CONFIG_IP_NF_SET_MAX;
++static ip_set_id_t ip_set_bindings_hash_size =  CONFIG_IP_NF_SET_HASHSIZE;
++static struct list_head *ip_set_hash;		/* hash of bindings */
++static unsigned int ip_set_hash_random;		/* random seed */
++
++/* Arrgh */
++#ifdef MODULE
++#define __MOD_INC(foo) 		__MOD_INC_USE_COUNT(foo)
++#define __MOD_DEC(foo) 		__MOD_DEC_USE_COUNT(foo)
++#define __MOD_INC_SELF		MOD_INC_USE_COUNT
++#define __MOD_DEC_SELF		MOD_DEC_USE_COUNT
++#else
++#define __MOD_INC(foo)
++#define __MOD_DEC(foo)
++#define __MOD_INC_SELF
++#define __MOD_DEC_SELF
++#endif
++
++/*
++ * Sets are identified either by the index in ip_set_list or by id.
++ * The id never changes and is used to find a key in the hash. 
++ * The index may change by swapping and used at all other places 
++ * (set/SET netfilter modules, binding value, etc.)
++ *
++ * Userspace requests are serialized by ip_set_mutex and sets can
++ * be deleted only from userspace. Therefore ip_set_list locking 
++ * must obey the following rules:
++ *
++ * - kernel requests: read and write locking mandatory
++ * - user requests: read locking optional, write locking mandatory
++ */
++
++static inline void
++__ip_set_get(ip_set_id_t index)
++{
++	atomic_inc(&ip_set_list[index]->ref);
++}
++
++static inline void
++__ip_set_put(ip_set_id_t index)
++{
++	atomic_dec(&ip_set_list[index]->ref);
++}
++
++/*
++ * Binding routines
++ */
++
++static inline int
++ip_hash_cmp(const struct ip_set_hash *set_hash,
++	    ip_set_id_t id, ip_set_ip_t ip)
++{
++	return set_hash->id == id && set_hash->ip == ip;
++}
++
++static ip_set_id_t
++ip_set_find_in_hash(ip_set_id_t id, ip_set_ip_t ip)
++{
++	u_int32_t key = jhash_2words(id, ip, ip_set_hash_random) 
++				% ip_set_bindings_hash_size;
++	struct ip_set_hash *set_hash;
++
++	MUST_BE_READ_LOCKED(&ip_set_lock);
++	IP_SET_ASSERT(ip_set_list[id]);
++	DP("set: %s, ip: %u.%u.%u.%u", ip_set_list[id]->name, HIPQUAD(ip));	
++	
++	set_hash = LIST_FIND(&ip_set_hash[key], ip_hash_cmp,
++			     struct ip_set_hash *, id, ip);
++	
++	DP("set: %s, ip: %u.%u.%u.%u, binding: %s", ip_set_list[id]->name, 
++	   HIPQUAD(ip),
++	   set_hash != NULL ? ip_set_list[set_hash->binding]->name : "");
++
++	return (set_hash != NULL ? set_hash->binding : IP_SET_INVALID_ID);
++}
++
++static inline void 
++__set_hash_del(struct ip_set_hash *set_hash)
++{
++	MUST_BE_WRITE_LOCKED(&ip_set_lock);
++	IP_SET_ASSERT(ip_set_list[set_hash->binding]);	
++
++	__ip_set_put(set_hash->binding);
++	list_del(&set_hash->list);
++	kfree(set_hash);
++}
++
++static int
++ip_set_hash_del(ip_set_id_t id, ip_set_ip_t ip)
++{
++	u_int32_t key = jhash_2words(id, ip, ip_set_hash_random)
++				% ip_set_bindings_hash_size;
++	struct ip_set_hash *set_hash;
++	
++	IP_SET_ASSERT(ip_set_list[id]);
++	DP("set: %s, ip: %u.%u.%u.%u", ip_set_list[id]->name, HIPQUAD(ip));	
++	WRITE_LOCK(&ip_set_lock);
++	set_hash = LIST_FIND(&ip_set_hash[key], ip_hash_cmp,
++			     struct ip_set_hash *, id, ip);
++	DP("set: %s, ip: %u.%u.%u.%u, binding: %s", ip_set_list[id]->name,
++	   HIPQUAD(ip),
++	   set_hash != NULL ? ip_set_list[set_hash->binding]->name : "");
++
++	if (set_hash != NULL)
++		__set_hash_del(set_hash);
++	WRITE_UNLOCK(&ip_set_lock);
++	return 0;
++}
++
++static int 
++ip_set_hash_add(ip_set_id_t id, ip_set_ip_t ip, ip_set_id_t binding)
++{
++	u_int32_t key = jhash_2words(id, ip, ip_set_hash_random)
++				% ip_set_bindings_hash_size;
++	struct ip_set_hash *set_hash;
++	int ret = 0;
++	
++	IP_SET_ASSERT(ip_set_list[id]);
++	IP_SET_ASSERT(ip_set_list[binding]);
++	DP("set: %s, ip: %u.%u.%u.%u, binding: %s", ip_set_list[id]->name, 
++	   HIPQUAD(ip), ip_set_list[binding]->name);
++	WRITE_LOCK(&ip_set_lock);
++	set_hash = LIST_FIND(&ip_set_hash[key], ip_hash_cmp,
++			     struct ip_set_hash *, id, ip);
++	if (!set_hash) {
++		set_hash = kmalloc(sizeof(struct ip_set_hash), GFP_KERNEL);
++		if (!set_hash) {
++			ret = -ENOMEM;
++			goto unlock;
++		}
++		INIT_LIST_HEAD(&set_hash->list);
++		set_hash->id = id;
++		set_hash->ip = ip;
++		list_add(&ip_set_hash[key], &set_hash->list);
++	} else {
++		IP_SET_ASSERT(ip_set_list[set_hash->binding]);	
++		DP("overwrite binding: %s",
++		   ip_set_list[set_hash->binding]->name);
++		__ip_set_put(set_hash->binding);
++	}
++	set_hash->binding = binding;
++	__ip_set_get(set_hash->binding);
++    unlock:
++	WRITE_UNLOCK(&ip_set_lock);
++	return ret;
++}
++
++#define FOREACH_HASH_DO(fn, args...) 						\
++({										\
++	ip_set_id_t __key;							\
++	struct ip_set_hash *__set_hash;						\
++										\
++	for (__key = 0; __key < ip_set_bindings_hash_size; __key++) {		\
++		list_for_each_entry(__set_hash, &ip_set_hash[__key], list)	\
++			fn(__set_hash , ## args);				\
++	}									\
++})
++
++#define FOREACH_HASH_RW_DO(fn, args...) 						\
++({										\
++	ip_set_id_t __key;							\
++	struct ip_set_hash *__set_hash, *__n;					\
++										\
++	MUST_BE_WRITE_LOCKED(&ip_set_lock);					\
++	for (__key = 0; __key < ip_set_bindings_hash_size; __key++) {		\
++		list_for_each_entry_safe(__set_hash, __n, &ip_set_hash[__key], list)\
++			fn(__set_hash , ## args);				\
++	}									\
++})
++
++/* Add, del and test set entries from kernel */
++
++#define follow_bindings(index, set, ip)					\
++((index = ip_set_find_in_hash((set)->id, ip)) != IP_SET_INVALID_ID	\
++ || (index = (set)->binding) != IP_SET_INVALID_ID)
++
++int
++ip_set_testip_kernel(ip_set_id_t index,
++		     const struct sk_buff *skb,
++		     const u_int32_t *flags)
++{
++	struct ip_set *set;
++	ip_set_ip_t ip;
++	int res, i = 0;
++	
++	IP_SET_ASSERT(flags[i]);
++	READ_LOCK(&ip_set_lock);
++	do {
++		set = ip_set_list[index];
++		IP_SET_ASSERT(set);
++		DP("set %s, index %u", set->name, index);
++		read_lock_bh(&set->lock);
++		res = set->type->testip_kernel(set, skb, flags[i], &ip);
++		read_unlock_bh(&set->lock);
++	} while (res > 0 
++		 && flags[++i] 
++		 && follow_bindings(index, set, ip));
++	READ_UNLOCK(&ip_set_lock);
++
++	return res;
++}
++
++void
++ip_set_addip_kernel(ip_set_id_t index,
++		    const struct sk_buff *skb,
++		    const u_int32_t *flags)
++{
++	struct ip_set *set;
++	ip_set_ip_t ip;
++	int res, i= 0;
++
++	IP_SET_ASSERT(flags[i]);
++    retry:
++	READ_LOCK(&ip_set_lock);
++	do {
++		set = ip_set_list[index];
++		IP_SET_ASSERT(set);
++		DP("set %s, index %u", set->name, index);
++		write_lock_bh(&set->lock);
++		res = set->type->addip_kernel(set, skb, flags[i], &ip);
++		write_unlock_bh(&set->lock);
++	} while ((res == 0 || res == -EEXIST)
++		 && flags[++i] 
++		 && follow_bindings(index, set, ip));
++	READ_UNLOCK(&ip_set_lock);
++	
++	if (res == -EAGAIN
++	    && set->type->retry
++	    && (res = set->type->retry(set)) == 0)
++	    	goto retry;
++}
++
++void
++ip_set_delip_kernel(ip_set_id_t index,
++		    const struct sk_buff *skb,
++		    const u_int32_t *flags)
++{
++	struct ip_set *set;
++	ip_set_ip_t ip;
++	int res, i = 0;
++
++	IP_SET_ASSERT(flags[i]);
++	READ_LOCK(&ip_set_lock);
++	do {
++		set = ip_set_list[index];
++		IP_SET_ASSERT(set);
++		DP("set %s, index %u", set->name, index);
++		write_lock_bh(&set->lock);
++		res = set->type->delip_kernel(set, skb, flags[i], &ip);
++		write_unlock_bh(&set->lock);
++	} while ((res == 0 || res == -EEXIST)
++		 && flags[++i] 
++		 && follow_bindings(index, set, ip));
++	READ_UNLOCK(&ip_set_lock);
++}
++
++/* Register and deregister settype */
++
++static inline int
++set_type_equal(const struct ip_set_type *set_type, const char *str2)
++{
++	return !strncmp(set_type->typename, str2, IP_SET_MAXNAMELEN - 1);
++}
++
++static inline struct ip_set_type *
++find_set_type(const char *name)
++{
++	return LIST_FIND(&set_type_list,
++			 set_type_equal,
++			 struct ip_set_type *,
++			 name);
++}
++
++int 
++ip_set_register_set_type(struct ip_set_type *set_type)
++{
++	int ret = 0;
++	
++	if (set_type->protocol_version != IP_SET_PROTOCOL_VERSION) {
++		ip_set_printk("'%s' uses wrong protocol version %u (want %u)",
++			      set_type->typename,
++			      set_type->protocol_version,
++			      IP_SET_PROTOCOL_VERSION);
++		return -EINVAL;
++	}
++
++	WRITE_LOCK(&ip_set_lock);
++	if (find_set_type(set_type->typename)) {
++		/* Duplicate! */
++		ip_set_printk("'%s' already registered!", 
++			      set_type->typename);
++		ret = -EINVAL;
++		goto unlock;
++	}
++	__MOD_INC_SELF;
++	list_append(&set_type_list, set_type);
++	DP("'%s' registered.", set_type->typename);
++   unlock:
++	WRITE_UNLOCK(&ip_set_lock);
++	return ret;
++}
++
++void
++ip_set_unregister_set_type(struct ip_set_type *set_type)
++{
++	WRITE_LOCK(&ip_set_lock);
++	if (!find_set_type(set_type->typename)) {
++		ip_set_printk("'%s' not registered?",
++			      set_type->typename);
++		goto unlock;
++	}
++	LIST_DELETE(&set_type_list, set_type);
++	__MOD_DEC_SELF;
++	DP("'%s' unregistered.", set_type->typename);
++   unlock:
++	WRITE_UNLOCK(&ip_set_lock);
++
++}
++
++/*
++ * Userspace routines
++ */
++
++/*
++ * Find set by name, reference it once. The reference makes sure the
++ * thing pointed to, does not go away under our feet. Drop the reference
++ * later, using ip_set_put().
++ */
++ip_set_id_t
++ip_set_get_byname(const char *name)
++{
++	ip_set_id_t i, index = IP_SET_INVALID_ID;
++	
++	down(&ip_set_app_mutex);
++	for (i = 0; i < ip_set_max; i++) {
++		if (ip_set_list[i] != NULL
++		    && strcmp(ip_set_list[i]->name, name) == 0) {
++			__ip_set_get(i);
++			index = i;
++			break;
++		}
++	}
++	up(&ip_set_app_mutex);
++	return index;
++}
++
++/*
++ * Find set by index, reference it once. The reference makes sure the
++ * thing pointed to, does not go away under our feet. Drop the reference
++ * later, using ip_set_put().
++ */
++ip_set_id_t
++ip_set_get_byindex(ip_set_id_t index)
++{
++	down(&ip_set_app_mutex);
++
++	if (index >= ip_set_max)
++		return IP_SET_INVALID_ID;
++	
++	if (ip_set_list[index])
++		__ip_set_get(index);
++	else
++		index = IP_SET_INVALID_ID;
++		
++	up(&ip_set_app_mutex);
++	return index;
++}
++
++/*
++ * If the given set pointer points to a valid set, decrement
++ * reference count by 1. The caller shall not assume the index
++ * to be valid, after calling this function.
++ */
++void ip_set_put(ip_set_id_t index)
++{
++	down(&ip_set_app_mutex);
++	if (ip_set_list[index])
++		__ip_set_put(index);
++	up(&ip_set_app_mutex);
++}
++
++/* Find a set by name or index */
++static ip_set_id_t
++ip_set_find_byname(const char *name)
++{
++	ip_set_id_t i, index = IP_SET_INVALID_ID;
++	
++	for (i = 0; i < ip_set_max; i++) {
++		if (ip_set_list[i] != NULL
++		    && strcmp(ip_set_list[i]->name, name) == 0) {
++			index = i;
++			break;
++		}
++	}
++	return index;
++}
++
++static ip_set_id_t
++ip_set_find_byindex(ip_set_id_t index)
++{
++	if (index >= ip_set_max || ip_set_list[index] == NULL)
++		index = IP_SET_INVALID_ID;
++	
++	return index;
++}
++
++/*
++ * Add, del, test, bind and unbind
++ */
++
++static inline int
++__ip_set_testip(struct ip_set *set,
++	        const void *data,
++	        size_t size,
++	        ip_set_ip_t *ip)
++{
++	int res;
++
++	read_lock_bh(&set->lock);
++	res = set->type->testip(set, data, size, ip);
++	read_unlock_bh(&set->lock);
++
++	return res;
++}
++
++static int
++__ip_set_addip(ip_set_id_t index,
++	       const void *data,
++	       size_t size)
++{
++	struct ip_set *set = ip_set_list[index];
++	ip_set_ip_t ip;
++	int res;
++	
++	IP_SET_ASSERT(set);
++	do {
++		write_lock_bh(&set->lock);
++		res = set->type->addip(set, data, size, &ip);
++		write_unlock_bh(&set->lock);
++	} while (res == -EAGAIN
++		 && set->type->retry
++		 && (res = set->type->retry(set)) == 0);
++
++	return res;
++}
++
++static int
++ip_set_addip(ip_set_id_t index,
++	     const void *data,
++	     size_t size)
++{
++
++	return __ip_set_addip(index,
++			      data + sizeof(struct ip_set_req_adt),
++			      size - sizeof(struct ip_set_req_adt));
++}
++
++static int
++ip_set_delip(ip_set_id_t index,
++	     const void *data,
++	     size_t size)
++{
++	struct ip_set *set = ip_set_list[index];
++	ip_set_ip_t ip;
++	int res;
++	
++	IP_SET_ASSERT(set);
++	write_lock_bh(&set->lock);
++	res = set->type->delip(set,
++			       data + sizeof(struct ip_set_req_adt),
++			       size - sizeof(struct ip_set_req_adt),
++			       &ip);
++	write_unlock_bh(&set->lock);
++
++	return res;
++}
++
++static int
++ip_set_testip(ip_set_id_t index,
++	      const void *data,
++	      size_t size)
++{
++	struct ip_set *set = ip_set_list[index];
++	ip_set_ip_t ip;
++	int res;
++
++	IP_SET_ASSERT(set);
++	res = __ip_set_testip(set,
++			      data + sizeof(struct ip_set_req_adt),
++			      size - sizeof(struct ip_set_req_adt),
++			      &ip);
++
++	return (res > 0 ? -EEXIST : res);
++}
++
++static int
++ip_set_bindip(ip_set_id_t index,
++	      const void *data,
++	      size_t size)
++{
++	struct ip_set *set = ip_set_list[index];
++	struct ip_set_req_bind *req_bind;
++	ip_set_id_t binding;
++	ip_set_ip_t ip;
++	int res;
++
++	IP_SET_ASSERT(set);
++	if (size < sizeof(struct ip_set_req_bind))
++		return -EINVAL;
++		
++	req_bind = (struct ip_set_req_bind *) data;
++	req_bind->binding[IP_SET_MAXNAMELEN - 1] = '\0';
++
++	if (strcmp(req_bind->binding, IPSET_TOKEN_DEFAULT) == 0) {
++		/* Default binding of a set */
++		char *binding_name;
++		
++		if (size != sizeof(struct ip_set_req_bind) + IP_SET_MAXNAMELEN)
++			return -EINVAL;
++
++		binding_name = (char *)(data + sizeof(struct ip_set_req_bind));	
++		binding_name[IP_SET_MAXNAMELEN - 1] = '\0';
++
++		binding = ip_set_find_byname(binding_name);
++		if (binding == IP_SET_INVALID_ID)
++			return -ENOENT;
++
++		WRITE_LOCK(&ip_set_lock);
++		/* Sets as binding values are referenced */
++		if (set->binding != IP_SET_INVALID_ID)
++			__ip_set_put(set->binding);
++		set->binding = binding;
++		__ip_set_get(set->binding);
++		WRITE_UNLOCK(&ip_set_lock);
++
++		return 0;
++	}
++	binding = ip_set_find_byname(req_bind->binding);
++	if (binding == IP_SET_INVALID_ID)
++		return -ENOENT;
++
++	res = __ip_set_testip(set,
++			      data + sizeof(struct ip_set_req_bind),
++			      size - sizeof(struct ip_set_req_bind),
++			      &ip);
++	DP("set %s, ip: %u.%u.%u.%u, binding %s",
++	   set->name, HIPQUAD(ip), ip_set_list[binding]->name);
++	
++	if (res >= 0)
++		res = ip_set_hash_add(set->id, ip, binding);
++
++	return res;
++}
++
++#define FOREACH_SET_DO(fn, args...) 				\
++({								\
++	ip_set_id_t __i;					\
++	struct ip_set *__set;					\
++								\
++	for (__i = 0; __i < ip_set_max; __i++) {		\
++		__set = ip_set_list[__i];			\
++		if (__set != NULL)				\
++			fn(__set , ##args);			\
++	}							\
++})
++
++static inline void
++__set_hash_del_byid(struct ip_set_hash *set_hash, ip_set_id_t id)
++{
++	if (set_hash->id == id)
++		__set_hash_del(set_hash);
++}
++
++static inline void
++__unbind_default(struct ip_set *set)
++{
++	if (set->binding != IP_SET_INVALID_ID) {
++		/* Sets as binding values are referenced */
++		__ip_set_put(set->binding);
++		set->binding = IP_SET_INVALID_ID;
++	}
++}
++
++static int
++ip_set_unbindip(ip_set_id_t index,
++	        const void *data,
++	        size_t size)
++{
++	struct ip_set *set;
++	struct ip_set_req_bind *req_bind;
++	ip_set_ip_t ip;
++	int res;
++
++	DP("");
++	if (size < sizeof(struct ip_set_req_bind))
++		return -EINVAL;
++		
++	req_bind = (struct ip_set_req_bind *) data;
++	req_bind->binding[IP_SET_MAXNAMELEN - 1] = '\0';
++	
++	DP("%u %s", index, req_bind->binding);
++	if (index == IP_SET_INVALID_ID) {
++		/* unbind :all: */
++		if (strcmp(req_bind->binding, IPSET_TOKEN_DEFAULT) == 0) {
++			/* Default binding of sets */
++			WRITE_LOCK(&ip_set_lock);
++			FOREACH_SET_DO(__unbind_default);
++			WRITE_UNLOCK(&ip_set_lock);
++			return 0;
++		} else if (strcmp(req_bind->binding, IPSET_TOKEN_ALL) == 0) {
++			/* Flush all bindings of all sets*/
++			WRITE_LOCK(&ip_set_lock);
++			FOREACH_HASH_RW_DO(__set_hash_del);
++			WRITE_UNLOCK(&ip_set_lock);
++			return 0;
++		}
++		DP("unreachable reached!");
++		return -EINVAL;
++	}
++	
++	set = ip_set_list[index];
++	IP_SET_ASSERT(set);
++	if (strcmp(req_bind->binding, IPSET_TOKEN_DEFAULT) == 0) {
++		/* Default binding of set */
++		ip_set_id_t binding = ip_set_find_byindex(set->binding);
++
++		if (binding == IP_SET_INVALID_ID)
++			return -ENOENT;
++			
++		WRITE_LOCK(&ip_set_lock);
++		/* Sets in hash values are referenced */
++		__ip_set_put(set->binding);
++		set->binding = IP_SET_INVALID_ID;
++		WRITE_UNLOCK(&ip_set_lock);
++
++		return 0;
++	} else if (strcmp(req_bind->binding, IPSET_TOKEN_ALL) == 0) {
++		/* Flush all bindings */
++
++		WRITE_LOCK(&ip_set_lock);
++		FOREACH_HASH_RW_DO(__set_hash_del_byid, set->id);
++		WRITE_UNLOCK(&ip_set_lock);
++		return 0;
++	}
++	
++	res = __ip_set_testip(set,
++			      data + sizeof(struct ip_set_req_bind),
++			      size - sizeof(struct ip_set_req_bind),
++			      &ip);
++
++	DP("set %s, ip: %u.%u.%u.%u", set->name, HIPQUAD(ip));
++	if (res >= 0)
++		res = ip_set_hash_del(set->id, ip);
++
++	return res;
++}
++
++static int
++ip_set_testbind(ip_set_id_t index,
++	        const void *data,
++	        size_t size)
++{
++	struct ip_set *set = ip_set_list[index];
++	struct ip_set_req_bind *req_bind;
++	ip_set_id_t binding;
++	ip_set_ip_t ip;
++	int res;
++
++	IP_SET_ASSERT(set);
++	if (size < sizeof(struct ip_set_req_bind))
++		return -EINVAL;
++		
++	req_bind = (struct ip_set_req_bind *) data;
++	req_bind->binding[IP_SET_MAXNAMELEN - 1] = '\0';
++
++	if (strcmp(req_bind->binding, IPSET_TOKEN_DEFAULT) == 0) {
++		/* Default binding of set */
++		char *binding_name;
++		
++		if (size != sizeof(struct ip_set_req_bind) + IP_SET_MAXNAMELEN)
++			return -EINVAL;
++
++		binding_name = (char *)(data + sizeof(struct ip_set_req_bind));	
++		binding_name[IP_SET_MAXNAMELEN - 1] = '\0';
++
++		binding = ip_set_find_byname(binding_name);
++		if (binding == IP_SET_INVALID_ID)
++			return -ENOENT;
++		
++		res = (set->binding == binding) ? -EEXIST : 0;
++
++		return res;
++	}
++	binding = ip_set_find_byname(req_bind->binding);
++	if (binding == IP_SET_INVALID_ID)
++		return -ENOENT;
++		
++	
++	res = __ip_set_testip(set,
++			      data + sizeof(struct ip_set_req_bind),
++			      size - sizeof(struct ip_set_req_bind),
++			      &ip);
++	DP("set %s, ip: %u.%u.%u.%u, binding %s",
++	   set->name, HIPQUAD(ip), ip_set_list[binding]->name);
++	
++	if (res >= 0)
++		res = (ip_set_find_in_hash(set->id, ip) == binding)
++			? -EEXIST : 0;
++
++	return res;
++}
++
++static struct ip_set_type *
++find_set_type_rlock(const char *typename)
++{
++	struct ip_set_type *type;
++	
++	READ_LOCK(&ip_set_lock);
++	type = find_set_type(typename);
++	if (type == NULL)
++		READ_UNLOCK(&ip_set_lock);
++
++	return type;
++}
++
++static int
++find_free_id(const char *name,
++	     ip_set_id_t *index,
++	     ip_set_id_t *id)
++{
++	ip_set_id_t i;
++
++	*id = IP_SET_INVALID_ID;
++	for (i = 0;  i < ip_set_max; i++) {
++		if (ip_set_list[i] == NULL) {
++			if (*id == IP_SET_INVALID_ID)
++				*id = *index = i;
++		} else if (strcmp(name, ip_set_list[i]->name) == 0)
++			/* Name clash */
++			return -EEXIST;
++	}
++	if (*id == IP_SET_INVALID_ID)
++		/* No free slot remained */
++		return -ERANGE;
++	/* Check that index is usable as id (swapping) */
++    check:	
++	for (i = 0;  i < ip_set_max; i++) {
++		if (ip_set_list[i] != NULL
++		    && ip_set_list[i]->id == *id) {
++		    *id = i;
++		    goto check;
++		}
++	}
++	return 0;
++}
++
++/*
++ * Create a set
++ */
++static int
++ip_set_create(const char *name,
++	      const char *typename,
++	      ip_set_id_t restore,
++	      const void *data,
++	      size_t size)
++{
++	struct ip_set *set;
++	ip_set_id_t index, id;
++	int res = 0;
++
++	DP("setname: %s, typename: %s, id: %u", name, typename, restore);
++	/*
++	 * First, and without any locks, allocate and initialize
++	 * a normal base set structure.
++	 */
++	set = kmalloc(sizeof(struct ip_set), GFP_KERNEL);
++	if (!set)
++		return -ENOMEM;
++	set->lock = RW_LOCK_UNLOCKED;
++	strncpy(set->name, name, IP_SET_MAXNAMELEN);
++	set->binding = IP_SET_INVALID_ID;
++	atomic_set(&set->ref, 0);
++
++	/*
++	 * Next, take the &ip_set_lock, check that we know the type,
++	 * and take a reference on the type, to make sure it
++	 * stays available while constructing our new set.
++	 *
++	 * After referencing the type, we drop the &ip_set_lock,
++	 * and let the new set construction run without locks.
++	 */
++	set->type = find_set_type_rlock(typename);
++	if (set->type == NULL) {
++		/* Try loading the module */
++		char modulename[IP_SET_MAXNAMELEN + strlen("ip_set_") + 1];
++		strcpy(modulename, "ip_set_");
++		strcat(modulename, typename);
++		DP("try to load %s", modulename);
++		request_module(modulename);
++		set->type = find_set_type_rlock(typename);
++	}
++	if (set->type == NULL) {
++		ip_set_printk("no set type '%s', set '%s' not created",
++			      typename, name);
++		kfree(set);
++		return -ENOENT;
++	}
++	__MOD_INC(set->type->me);
++	READ_UNLOCK(&ip_set_lock);
++
++	/*
++	 * Without holding any locks, create private part.
++	 */
++	res = set->type->create(set, data, size);
++	if (res != 0) {
++		__MOD_DEC(set->type->me);
++		kfree(set);
++		return res;
++	}
++
++	/* BTW, res==0 here. */
++
++	/*
++	 * Here, we have a valid, constructed set. &ip_set_lock again,
++	 * find free id/index and check that it is not already in 
++	 * ip_set_list.
++	 */
++	WRITE_LOCK(&ip_set_lock);
++	if ((res = find_free_id(set->name, &index, &id)) != 0) {
++		DP("no free id!");
++		goto cleanup;
++	}
++
++	/* Make sure restore gets the same index */
++	if (restore != IP_SET_INVALID_ID && index != restore) {
++		DP("Can't restore, sets are screwed up");
++		res = -ERANGE;
++		goto cleanup;
++	}
++	 
++	/*
++	 * Finally! Add our shiny new set to the list, and be done.
++	 */
++	DP("create: '%s' created with index %u, id %u!", set->name, index, id);
++	set->id = id;
++	ip_set_list[index] = set;
++	WRITE_UNLOCK(&ip_set_lock);
++	return res;
++	
++    cleanup:
++	WRITE_UNLOCK(&ip_set_lock);
++	set->type->destroy(set);
++	__MOD_DEC(set->type->me);
++	kfree(set);
++	return res;
++}
++
++/*
++ * Destroy a given existing set
++ */
++static void
++ip_set_destroy_set(ip_set_id_t index)
++{
++	struct ip_set *set = ip_set_list[index];
++
++	IP_SET_ASSERT(set);
++	DP("set: %s",  set->name);
++	WRITE_LOCK(&ip_set_lock);
++	FOREACH_HASH_RW_DO(__set_hash_del_byid, set->id);
++	if (set->binding != IP_SET_INVALID_ID)
++		__ip_set_put(set->binding);
++	ip_set_list[index] = NULL;
++	WRITE_UNLOCK(&ip_set_lock);
++
++	/* Must call it without holding any lock */
++	set->type->destroy(set);
++	__MOD_DEC(set->type->me);
++	kfree(set);
++}
++
++/*
++ * Destroy a set - or all sets
++ * Sets must not be referenced/used.
++ */
++static int
++ip_set_destroy(ip_set_id_t index)
++{
++	ip_set_id_t i;
++
++	/* ref modification always protected by the mutex */
++	if (index != IP_SET_INVALID_ID) {
++		if (atomic_read(&ip_set_list[index]->ref))
++			return -EBUSY;
++		ip_set_destroy_set(index);
++	} else {
++		for (i = 0; i < ip_set_max; i++) {
++			if (ip_set_list[i] != NULL 
++			    && (atomic_read(&ip_set_list[i]->ref)))
++			    	return -EBUSY;
++		}
++
++		for (i = 0; i < ip_set_max; i++) {
++			if (ip_set_list[i] != NULL)
++				ip_set_destroy_set(i);
++		}
++	}
++	return 0;
++}
++
++static void
++ip_set_flush_set(struct ip_set *set)
++{
++	DP("set: %s %u",  set->name, set->id);
++
++	write_lock_bh(&set->lock);
++	set->type->flush(set);
++	write_unlock_bh(&set->lock);
++}
++
++/* 
++ * Flush data in a set - or in all sets
++ */
++static int
++ip_set_flush(ip_set_id_t index)
++{
++	if (index != IP_SET_INVALID_ID) {
++		IP_SET_ASSERT(ip_set_list[index]);
++		ip_set_flush_set(ip_set_list[index]);
++	} else
++		FOREACH_SET_DO(ip_set_flush_set);
++
++	return 0;
++}
++
++/* Rename a set */
++static int
++ip_set_rename(ip_set_id_t index, const char *name)
++{
++	struct ip_set *set = ip_set_list[index];
++	ip_set_id_t i;
++	int res = 0;
++
++	DP("set: %s to %s",  set->name, name);
++	WRITE_LOCK(&ip_set_lock);
++	for (i = 0; i < ip_set_max; i++) {
++		if (ip_set_list[i] != NULL
++		    && strncmp(ip_set_list[i]->name, 
++			       name,
++			       IP_SET_MAXNAMELEN - 1) == 0) {
++			res = -EEXIST;
++			goto unlock;
++		}
++	}
++	strncpy(set->name, name, IP_SET_MAXNAMELEN);
++    unlock:
++	WRITE_UNLOCK(&ip_set_lock);
++	return res;
++}
++
++/*
++ * Swap two sets so that name/index points to the other.
++ * References are also swapped.
++ */
++static int
++ip_set_swap(ip_set_id_t from_index, ip_set_id_t to_index)
++{
++	struct ip_set *from = ip_set_list[from_index];
++	struct ip_set *to = ip_set_list[to_index];
++	char from_name[IP_SET_MAXNAMELEN];
++	u_int32_t from_ref;
++
++	DP("set: %s to %s",  from->name, to->name);
++	/* Type can't be changed. Artifical restriction. */
++	if (from->type->typecode != to->type->typecode)
++		return -ENOEXEC;
++
++	/* No magic here: ref munging protected by the mutex */	
++	WRITE_LOCK(&ip_set_lock);
++	strncpy(from_name, from->name, IP_SET_MAXNAMELEN);
++	from_ref = atomic_read(&from->ref);
++
++	strncpy(from->name, to->name, IP_SET_MAXNAMELEN);
++	atomic_set(&from->ref, atomic_read(&to->ref));
++	strncpy(to->name, from_name, IP_SET_MAXNAMELEN);
++	atomic_set(&to->ref, from_ref);
++	
++	ip_set_list[from_index] = to;
++	ip_set_list[to_index] = from;
++	
++	WRITE_UNLOCK(&ip_set_lock);
++	return 0;
++}
++
++/*
++ * List set data
++ */
++
++static inline void
++__set_hash_bindings_size_list(struct ip_set_hash *set_hash,
++			      ip_set_id_t id, size_t *size)
++{
++	if (set_hash->id == id)
++		*size += sizeof(struct ip_set_hash_list);
++}
++
++static inline void
++__set_hash_bindings_size_save(struct ip_set_hash *set_hash,
++			      ip_set_id_t id, size_t *size)
++{
++	if (set_hash->id == id)
++		*size += sizeof(struct ip_set_hash_save);
++}
++
++static inline void
++__set_hash_bindings(struct ip_set_hash *set_hash,
++		    ip_set_id_t id, void *data, int *used)
++{
++	if (set_hash->id == id) {
++		struct ip_set_hash_list *hash_list = 
++			(struct ip_set_hash_list *)(data + *used);
++
++		hash_list->ip = set_hash->ip;
++		hash_list->binding = set_hash->binding;
++		*used += sizeof(struct ip_set_hash_list);
++	}
++}
++
++static int ip_set_list_set(ip_set_id_t index,
++			   void *data,
++			   int *used,
++			   int len)
++{
++	struct ip_set *set = ip_set_list[index];
++	struct ip_set_list *set_list;
++
++	/* Pointer to our header */
++	set_list = (struct ip_set_list *) (data + *used);
++
++	DP("set: %s, used: %d %p %p", set->name, *used, data, data + *used);
++
++	/* Get and ensure header size */
++	if (*used + sizeof(struct ip_set_list) > len)
++		goto not_enough_mem;
++	*used += sizeof(struct ip_set_list);
++
++	read_lock_bh(&set->lock);
++	/* Get and ensure set specific header size */
++	set_list->header_size = set->type->header_size;
++	if (*used + set_list->header_size > len)
++		goto unlock_set;
++
++	/* Fill in the header */
++	set_list->index = index;
++	set_list->binding = set->binding;
++	set_list->ref = atomic_read(&set->ref);
++
++	/* Fill in set spefific header data */
++	DP("call list_header");
++	set->type->list_header(set, data + *used);
++	DP("call list_header, done");
++	*used += set_list->header_size;
++
++	/* Get and ensure set specific members size */
++	DP("call list_members_size");
++	set_list->members_size = set->type->list_members_size(set);
++	DP("call list_members_size, done");
++	if (*used + set_list->members_size > len)
++		goto unlock_set;
++
++	/* Fill in set spefific members data */
++	DP("call list_members");
++	set->type->list_members(set, data + *used);
++	DP("call list_members, done");
++	*used += set_list->members_size;
++	read_unlock_bh(&set->lock);
++
++	/* Bindings */
++
++	/* Get and ensure set specific bindings size */
++	set_list->bindings_size = 0;
++	FOREACH_HASH_DO(__set_hash_bindings_size_list,
++			set->id, &set_list->bindings_size);
++	if (*used + set_list->bindings_size > len)
++		goto not_enough_mem;
++
++	/* Fill in set spefific bindings data */
++	FOREACH_HASH_DO(__set_hash_bindings, set->id, data, used);
++	
++	return 0;
++
++    unlock_set:
++	read_unlock_bh(&set->lock);
++    not_enough_mem:
++	DP("not enough mem, try again");
++	return -EAGAIN;
++}
++
++/*
++ * Save sets
++ */
++static int ip_set_save_set(ip_set_id_t index,
++			   void *data,
++			   int *used,
++			   int len)
++{
++	struct ip_set *set;
++	struct ip_set_save *set_save;
++
++	/* Pointer to our header */
++	set_save = (struct ip_set_save *) (data + *used);
++
++	/* Get and ensure header size */
++	if (*used + sizeof(struct ip_set_save) > len)
++		goto not_enough_mem;
++	*used += sizeof(struct ip_set_save);
++
++	set = ip_set_list[index];
++	DP("set: %s, used: %u(%u) %p %p", set->name, *used, len, 
++	   data, data + *used);
++
++	read_lock_bh(&set->lock);
++	/* Get and ensure set specific header size */
++	set_save->header_size = set->type->header_size;
++	if (*used + set_save->header_size > len)
++		goto unlock_set;
++
++	/* Fill in the header */
++	set_save->index = index;
++	set_save->binding = set->binding;
++
++	/* Fill in set spefific header data */
++	set->type->list_header(set, data + *used);
++	*used += set_save->header_size;
++
++	DP("set header filled: %s, used: %u %p %p", set->name, *used,
++	   data, data + *used);
++	/* Get and ensure set specific members size */
++	set_save->members_size = set->type->list_members_size(set);
++	if (*used + set_save->members_size > len)
++		goto unlock_set;
++
++	/* Fill in set spefific members data */
++	set->type->list_members(set, data + *used);
++	*used += set_save->members_size;
++	read_unlock_bh(&set->lock);
++	DP("set members filled: %s, used: %u %p %p", set->name, *used,
++	   data, data + *used);
++	return 0;
++
++    unlock_set:
++	read_unlock_bh(&set->lock);
++    not_enough_mem:
++	DP("not enough mem, try again");
++	return -EAGAIN;
++}
++
++static inline void
++__set_hash_save_bindings(struct ip_set_hash *set_hash,
++			 ip_set_id_t id,
++			 void *data,
++			 int *used,
++			 int len,
++			 int *res)
++{
++	if (*res == 0
++	    && (id == IP_SET_INVALID_ID || set_hash->id == id)) {
++		struct ip_set_hash_save *hash_save = 
++			(struct ip_set_hash_save *)(data + *used);
++		/* Ensure bindings size */
++		if (*used + sizeof(struct ip_set_hash_save) > len) {
++			*res = -ENOMEM;
++			return;
++		}
++		hash_save->id = set_hash->id;
++		hash_save->ip = set_hash->ip;
++		hash_save->binding = set_hash->binding;
++		*used += sizeof(struct ip_set_hash_save);
++	}
++}
++
++static int ip_set_save_bindings(ip_set_id_t index,
++			   	void *data,
++			   	int *used,
++			   	int len)
++{
++	int res = 0;
++	struct ip_set_save *set_save;
++
++	DP("used %u, len %u", *used, len);
++	/* Get and ensure header size */
++	if (*used + sizeof(struct ip_set_save) > len)
++		return -ENOMEM;
++
++	/* Marker */
++	set_save = (struct ip_set_save *) (data + *used);
++	set_save->index = IP_SET_INVALID_ID;
++	*used += sizeof(struct ip_set_save);
++
++	DP("marker added used %u, len %u", *used, len);
++	/* Fill in bindings data */
++	if (index != IP_SET_INVALID_ID)
++		/* Sets are identified by id in hash */
++		index = ip_set_list[index]->id;
++	FOREACH_HASH_DO(__set_hash_save_bindings, index, data, used, len, &res);
++
++	return res;	
++}
++
++/*
++ * Restore sets
++ */
++static int ip_set_restore(void *data,
++			  int len)
++{
++	int res = 0;
++	int line = 0, used = 0, members_size;
++	struct ip_set *set;
++	struct ip_set_hash_save *hash_save;
++	struct ip_set_restore *set_restore;
++	ip_set_id_t index;
++
++	/* Loop to restore sets */
++	while (1) {
++		line++;
++		
++		DP("%u %u %u", used, sizeof(struct ip_set_restore), len);
++		/* Get and ensure header size */
++		if (used + sizeof(struct ip_set_restore) > len)
++			return line;
++		set_restore = (struct ip_set_restore *) (data + used);
++		used += sizeof(struct ip_set_restore);
++
++		/* Ensure data size */
++		if (used 
++		    + set_restore->header_size 
++		    + set_restore->members_size > len)
++			return line;
++
++		/* Check marker */
++		if (set_restore->index == IP_SET_INVALID_ID) {
++			line--;
++			goto bindings;
++		}
++		
++		/* Try to create the set */
++		DP("restore %s %s", set_restore->name, set_restore->typename);
++		res = ip_set_create(set_restore->name,
++				    set_restore->typename,
++				    set_restore->index,
++				    data + used,
++				    set_restore->header_size);
++		
++		if (res != 0)
++			return line;
++		used += set_restore->header_size;
++
++		index = ip_set_find_byindex(set_restore->index);
++		DP("index %u, restore_index %u", index, set_restore->index);
++		if (index != set_restore->index)
++			return line;
++		/* Try to restore members data */
++		set = ip_set_list[index];
++		members_size = 0;
++		DP("members_size %u reqsize %u",
++		   set_restore->members_size, set->type->reqsize);
++		while (members_size + set->type->reqsize <=
++		       set_restore->members_size) {
++			line++;
++		       	DP("members: %u, line %u", members_size, line);
++			res = __ip_set_addip(index,
++					   data + used + members_size,
++					   set->type->reqsize);
++			if (!(res == 0 || res == -EEXIST))
++				return line;
++			members_size += set->type->reqsize;
++		}
++
++		DP("members_size %u  %u",
++		   set_restore->members_size, members_size);
++		if (members_size != set_restore->members_size)
++			return line++;
++		used += set_restore->members_size;		
++	}
++	
++   bindings:
++   	/* Loop to restore bindings */
++   	while (used < len) {
++		line++;
++
++		DP("restore binding, line %u", line);		
++		/* Get and ensure size */
++		if (used + sizeof(struct ip_set_hash_save) > len)
++			return line;
++		hash_save = (struct ip_set_hash_save *) (data + used);
++		used += sizeof(struct ip_set_hash_save);
++		
++		/* hash_save->id is used to store the index */
++		index = ip_set_find_byindex(hash_save->id);
++		DP("restore binding index %u, id %u, %u -> %u",
++		   index, hash_save->id, hash_save->ip, hash_save->binding);		
++		if (index != hash_save->id)
++			return line;
++			
++		set = ip_set_list[hash_save->id];
++		/* Null valued IP means default binding */
++		if (hash_save->ip)
++			res = ip_set_hash_add(set->id, 
++					      hash_save->ip,
++					      hash_save->binding);
++		else {
++			IP_SET_ASSERT(set->binding == IP_SET_INVALID_ID);
++			WRITE_LOCK(&ip_set_lock);
++			set->binding = hash_save->binding;
++			__ip_set_get(set->binding);
++			WRITE_UNLOCK(&ip_set_lock);
++			DP("default binding: %u", set->binding);
++		}
++		if (res != 0)
++			return line;
++   	}
++   	if (used != len)
++   		return line;
++   	
++	return 0;	
++}
++
++static int
++ip_set_sockfn_set(struct sock *sk, int optval, void *user, unsigned int len)
++{
++	void *data;
++	int res = 0;		/* Assume OK */
++	unsigned *op;
++	struct ip_set_req_adt *req_adt;
++	ip_set_id_t index = IP_SET_INVALID_ID;
++	int (*adtfn)(ip_set_id_t index,
++		     const void *data, size_t size);
++	struct fn_table {
++		int (*fn)(ip_set_id_t index,
++			  const void *data, size_t size);
++	} adtfn_table[] =
++	{ { ip_set_addip }, { ip_set_delip }, { ip_set_testip},
++	  { ip_set_bindip}, { ip_set_unbindip }, { ip_set_testbind },
++	};
++
++	DP("optval=%d, user=%p, len=%d", optval, user, len);
++	if (!capable(CAP_NET_ADMIN))
++		return -EPERM;
++	if (optval != SO_IP_SET)
++		return -EBADF;
++	if (len <= sizeof(unsigned)) {
++		ip_set_printk("short userdata (want >%zu, got %u)",
++			      sizeof(unsigned), len);
++		return -EINVAL;
++	}
++	data = vmalloc(len);
++	if (!data) {
++		DP("out of mem for %u bytes", len);
++		return -ENOMEM;
++	}
++	if (copy_from_user(data, user, len) != 0) {
++		res = -EFAULT;
++		goto done;
++	}
++	if (down_interruptible(&ip_set_app_mutex)) {
++		res = -EINTR;
++		goto done;
++	}
++
++	op = (unsigned *)data;
++	DP("op=%x", *op);
++	
++	if (*op < IP_SET_OP_VERSION) {
++		/* Check the version at the beginning of operations */
++		struct ip_set_req_version *req_version =
++			(struct ip_set_req_version *) data;
++		if (req_version->version != IP_SET_PROTOCOL_VERSION) {
++			res = -EPROTO;
++			goto done;
++		}
++	}
++
++	switch (*op) {
++	case IP_SET_OP_CREATE:{
++		struct ip_set_req_create *req_create
++			= (struct ip_set_req_create *) data;
++		
++		if (len <= sizeof(struct ip_set_req_create)) {
++			ip_set_printk("short CREATE data (want >%zu, got %u)",
++				      sizeof(struct ip_set_req_create), len);
++			res = -EINVAL;
++			goto done;
++		}
++		req_create->name[IP_SET_MAXNAMELEN - 1] = '\0';
++		req_create->typename[IP_SET_MAXNAMELEN - 1] = '\0';
++		res = ip_set_create(req_create->name,
++				    req_create->typename,
++				    IP_SET_INVALID_ID,
++				    data + sizeof(struct ip_set_req_create),
++				    len - sizeof(struct ip_set_req_create));
++		goto done;
++	}
++	case IP_SET_OP_DESTROY:{
++		struct ip_set_req_std *req_destroy
++			= (struct ip_set_req_std *) data;
++		
++		if (len != sizeof(struct ip_set_req_std)) {
++			ip_set_printk("invalid DESTROY data (want %zu, got %u)",
++				      sizeof(struct ip_set_req_std), len);
++			res = -EINVAL;
++			goto done;
++		}
++		if (strcmp(req_destroy->name, IPSET_TOKEN_ALL) == 0) {
++			/* Destroy all sets */
++			index = IP_SET_INVALID_ID;
++		} else {
++			req_destroy->name[IP_SET_MAXNAMELEN - 1] = '\0';
++			index = ip_set_find_byname(req_destroy->name);
++
++			if (index == IP_SET_INVALID_ID) {
++				res = -ENOENT;
++				goto done;
++			}
++		}
++			
++		res = ip_set_destroy(index);
++		goto done;
++	}
++	case IP_SET_OP_FLUSH:{
++		struct ip_set_req_std *req_flush =
++			(struct ip_set_req_std *) data;
++
++		if (len != sizeof(struct ip_set_req_std)) {
++			ip_set_printk("invalid FLUSH data (want %zu, got %u)",
++				      sizeof(struct ip_set_req_std), len);
++			res = -EINVAL;
++			goto done;
++		}
++		if (strcmp(req_flush->name, IPSET_TOKEN_ALL) == 0) {
++			/* Flush all sets */
++			index = IP_SET_INVALID_ID;
++		} else {
++			req_flush->name[IP_SET_MAXNAMELEN - 1] = '\0';
++			index = ip_set_find_byname(req_flush->name);
++
++			if (index == IP_SET_INVALID_ID) {
++				res = -ENOENT;
++				goto done;
++			}
++		}
++		res = ip_set_flush(index);
++		goto done;
++	}
++	case IP_SET_OP_RENAME:{
++		struct ip_set_req_create *req_rename
++			= (struct ip_set_req_create *) data;
++
++		if (len != sizeof(struct ip_set_req_create)) {
++			ip_set_printk("invalid RENAME data (want %zu, got %u)",
++				      sizeof(struct ip_set_req_create), len);
++			res = -EINVAL;
++			goto done;
++		}
++
++		req_rename->name[IP_SET_MAXNAMELEN - 1] = '\0';
++		req_rename->typename[IP_SET_MAXNAMELEN - 1] = '\0';
++			
++		index = ip_set_find_byname(req_rename->name);
++		if (index == IP_SET_INVALID_ID) {
++			res = -ENOENT;
++			goto done;
++		}
++		res = ip_set_rename(index, req_rename->typename);
++		goto done;
++	}
++	case IP_SET_OP_SWAP:{
++		struct ip_set_req_create *req_swap
++			= (struct ip_set_req_create *) data;
++		ip_set_id_t to_index;
++
++		if (len != sizeof(struct ip_set_req_create)) {
++			ip_set_printk("invalid SWAP data (want %zu, got %u)",
++				      sizeof(struct ip_set_req_create), len);
++			res = -EINVAL;
++			goto done;
++		}
++
++		req_swap->name[IP_SET_MAXNAMELEN - 1] = '\0';
++		req_swap->typename[IP_SET_MAXNAMELEN - 1] = '\0';
++
++		index = ip_set_find_byname(req_swap->name);
++		if (index == IP_SET_INVALID_ID) {
++			res = -ENOENT;
++			goto done;
++		}
++		to_index = ip_set_find_byname(req_swap->typename);
++		if (to_index == IP_SET_INVALID_ID) {
++			res = -ENOENT;
++			goto done;
++		}
++		res = ip_set_swap(index, to_index);
++		goto done;
++	}
++	default: 
++		break;	/* Set identified by id */
++	}
++	
++	/* There we may have add/del/test/bind/unbind/test_bind operations */
++	if (*op < IP_SET_OP_ADD_IP || *op > IP_SET_OP_TEST_BIND_SET) {
++		res = -EBADMSG;
++		goto done;
++	}
++	adtfn = adtfn_table[*op - IP_SET_OP_ADD_IP].fn;
++
++	if (len < sizeof(struct ip_set_req_adt)) {
++		ip_set_printk("short data in adt request (want >=%zu, got %u)",
++			      sizeof(struct ip_set_req_adt), len);
++		res = -EINVAL;
++		goto done;
++	}
++	req_adt = (struct ip_set_req_adt *) data;
++
++	/* -U :all: :all:|:default: uses IP_SET_INVALID_ID */
++	if (!(*op == IP_SET_OP_UNBIND_SET 
++	      && req_adt->index == IP_SET_INVALID_ID)) {
++		index = ip_set_find_byindex(req_adt->index);
++		if (index == IP_SET_INVALID_ID) {
++			res = -ENOENT;
++			goto done;
++		}
++	}
++	res = adtfn(index, data, len);
++
++    done:
++	up(&ip_set_app_mutex);
++	vfree(data);
++	if (res > 0)
++		res = 0;
++	DP("final result %d", res);
++	return res;
++}
++
++static int 
++ip_set_sockfn_get(struct sock *sk, int optval, void *user, int *len)
++{
++	int res = 0;
++	unsigned *op;
++	ip_set_id_t index = IP_SET_INVALID_ID;
++	void *data;
++	int copylen = *len;
++
++	DP("optval=%d, user=%p, len=%d", optval, user, *len);
++	if (!capable(CAP_NET_ADMIN))
++		return -EPERM;
++	if (optval != SO_IP_SET)
++		return -EBADF;
++	if (*len < sizeof(unsigned)) {
++		ip_set_printk("short userdata (want >=%zu, got %d)",
++			      sizeof(unsigned), *len);
++		return -EINVAL;
++	}
++	data = vmalloc(*len);
++	if (!data) {
++		DP("out of mem for %d bytes", *len);
++		return -ENOMEM;
++	}
++	if (copy_from_user(data, user, *len) != 0) {
++		res = -EFAULT;
++		goto done;
++	}
++	if (down_interruptible(&ip_set_app_mutex)) {
++		res = -EINTR;
++		goto done;
++	}
++
++	op = (unsigned *) data;
++	DP("op=%x", *op);
++
++	if (*op < IP_SET_OP_VERSION) {
++		/* Check the version at the beginning of operations */
++		struct ip_set_req_version *req_version =
++			(struct ip_set_req_version *) data;
++		if (req_version->version != IP_SET_PROTOCOL_VERSION) {
++			res = -EPROTO;
++			goto done;
++		}
++	}
++
++	switch (*op) {
++	case IP_SET_OP_VERSION: {
++		struct ip_set_req_version *req_version =
++		    (struct ip_set_req_version *) data;
++
++		if (*len != sizeof(struct ip_set_req_version)) {
++			ip_set_printk("invalid VERSION (want %zu, got %d)",
++				      sizeof(struct ip_set_req_version),
++				      *len);
++			res = -EINVAL;
++			goto done;
++		}
++
++		req_version->version = IP_SET_PROTOCOL_VERSION;
++		res = copy_to_user(user, req_version,
++				   sizeof(struct ip_set_req_version));
++		goto done;
++	}
++	case IP_SET_OP_GET_BYNAME: {
++		struct ip_set_req_get_set *req_get
++			= (struct ip_set_req_get_set *) data;
++
++		if (*len != sizeof(struct ip_set_req_get_set)) {
++			ip_set_printk("invalid GET_BYNAME (want %zu, got %d)",
++				      sizeof(struct ip_set_req_get_set), *len);
++			res = -EINVAL;
++			goto done;
++		}
++		req_get->set.name[IP_SET_MAXNAMELEN - 1] = '\0';
++		index = ip_set_find_byname(req_get->set.name);
++		req_get->set.index = index;
++		goto copy;
++	}
++	case IP_SET_OP_GET_BYINDEX: {
++		struct ip_set_req_get_set *req_get
++			= (struct ip_set_req_get_set *) data;
++
++		if (*len != sizeof(struct ip_set_req_get_set)) {
++			ip_set_printk("invalid GET_BYINDEX (want %zu, got %d)",
++				      sizeof(struct ip_set_req_get_set), *len);
++			res = -EINVAL;
++			goto done;
++		}
++		req_get->set.name[IP_SET_MAXNAMELEN - 1] = '\0';
++		index = ip_set_find_byindex(req_get->set.index);
++		strncpy(req_get->set.name,
++			index == IP_SET_INVALID_ID ? ""
++			: ip_set_list[index]->name, IP_SET_MAXNAMELEN);
++		goto copy;
++	}
++	case IP_SET_OP_ADT_GET: {
++		struct ip_set_req_adt_get *req_get
++			= (struct ip_set_req_adt_get *) data;
++
++		if (*len != sizeof(struct ip_set_req_adt_get)) {
++			ip_set_printk("invalid ADT_GET (want %zu, got %d)",
++				      sizeof(struct ip_set_req_adt_get), *len);
++			res = -EINVAL;
++			goto done;
++		}
++		req_get->set.name[IP_SET_MAXNAMELEN - 1] = '\0';
++		index = ip_set_find_byname(req_get->set.name);
++		if (index != IP_SET_INVALID_ID) {
++			req_get->set.index = index;
++			strncpy(req_get->typename,
++				ip_set_list[index]->type->typename,
++				IP_SET_MAXNAMELEN - 1);
++		} else {
++			res = -ENOENT;
++			goto done;
++		}
++		goto copy;
++	}
++	case IP_SET_OP_MAX_SETS: {
++		struct ip_set_req_max_sets *req_max_sets
++			= (struct ip_set_req_max_sets *) data;
++		ip_set_id_t i;
++
++		if (*len != sizeof(struct ip_set_req_max_sets)) {
++			ip_set_printk("invalid MAX_SETS (want %zu, got %d)",
++				      sizeof(struct ip_set_req_max_sets), *len);
++			res = -EINVAL;
++			goto done;
++		}
++
++		if (strcmp(req_max_sets->set.name, IPSET_TOKEN_ALL) == 0) {
++			req_max_sets->set.index = IP_SET_INVALID_ID;
++		} else {
++			req_max_sets->set.name[IP_SET_MAXNAMELEN - 1] = '\0';
++			req_max_sets->set.index = 
++				ip_set_find_byname(req_max_sets->set.name);
++			if (req_max_sets->set.index == IP_SET_INVALID_ID) {
++				res = -ENOENT;
++				goto done;
++			}
++		}
++		req_max_sets->max_sets = ip_set_max;
++		req_max_sets->sets = 0;
++		for (i = 0; i < ip_set_max; i++) {
++			if (ip_set_list[i] != NULL)
++				req_max_sets->sets++;
++		}
++		goto copy;
++	}
++	case IP_SET_OP_LIST_SIZE: 
++	case IP_SET_OP_SAVE_SIZE: {
++		struct ip_set_req_setnames *req_setnames
++			= (struct ip_set_req_setnames *) data;
++		struct ip_set_name_list *name_list;
++		struct ip_set *set;
++		ip_set_id_t i;
++		int used;
++
++		if (*len < sizeof(struct ip_set_req_setnames)) {
++			ip_set_printk("short LIST_SIZE (want >=%zu, got %d)",
++				      sizeof(struct ip_set_req_setnames), *len);
++			res = -EINVAL;
++			goto done;
++		}
++
++		req_setnames->size = 0;
++		used = sizeof(struct ip_set_req_setnames);
++		for (i = 0; i < ip_set_max; i++) {
++			if (ip_set_list[i] == NULL)
++				continue;
++			name_list = (struct ip_set_name_list *) 
++				(data + used);
++			used += sizeof(struct ip_set_name_list);
++			if (used > copylen) {
++				res = -EAGAIN;
++				goto done;
++			}
++			set = ip_set_list[i];
++			/* Fill in index, name, etc. */
++			name_list->index = i;
++			name_list->id = set->id;
++			strncpy(name_list->name,
++				set->name,
++				IP_SET_MAXNAMELEN - 1);
++			strncpy(name_list->typename,
++				set->type->typename,
++				IP_SET_MAXNAMELEN - 1);
++			DP("filled %s of type %s, index %u\n",
++			   name_list->name, name_list->typename,
++			   name_list->index);
++			if (!(req_setnames->index == IP_SET_INVALID_ID
++			      || req_setnames->index == i))
++			      continue;
++			/* Update size */
++			switch (*op) {
++			case IP_SET_OP_LIST_SIZE: {
++				req_setnames->size += sizeof(struct ip_set_list)
++					+ set->type->header_size
++					+ set->type->list_members_size(set);
++				FOREACH_HASH_DO(__set_hash_bindings_size_list, 
++						i, &req_setnames->size);
++				break;
++			}
++			case IP_SET_OP_SAVE_SIZE: {
++				req_setnames->size += sizeof(struct ip_set_save)
++					+ set->type->header_size
++					+ set->type->list_members_size(set);
++				FOREACH_HASH_DO(__set_hash_bindings_size_save,
++						i, &req_setnames->size);
++				break;
++			}
++			default:
++				break;
++			}
++		}
++		if (copylen != used) {
++			res = -EAGAIN;
++			goto done;
++		}
++		goto copy;
++	}
++	case IP_SET_OP_LIST: {
++		struct ip_set_req_list *req_list
++			= (struct ip_set_req_list *) data;
++		ip_set_id_t i;
++		int used;
++
++		if (*len < sizeof(struct ip_set_req_list)) {
++			ip_set_printk("short LIST (want >=%zu, got %d)",
++				      sizeof(struct ip_set_req_list), *len);
++			res = -EINVAL;
++			goto done;
++		}
++		index = req_list->index;
++		if (index != IP_SET_INVALID_ID
++		    && ip_set_find_byindex(index) != index) {
++		    	res = -ENOENT;
++		    	goto done;
++		}
++		used = 0;
++		if (index == IP_SET_INVALID_ID) {
++			/* List all sets */
++			for (i = 0; i < ip_set_max && res == 0; i++) {
++				if (ip_set_list[i] != NULL)
++					res = ip_set_list_set(i, data, &used, *len);
++			}
++		} else {
++			/* List an individual set */
++			res = ip_set_list_set(index, data, &used, *len);
++		}
++		if (res != 0)
++			goto done;
++		else if (copylen != used) {
++			res = -EAGAIN;
++			goto done;
++		}
++		goto copy;
++	}
++	case IP_SET_OP_SAVE: {
++		struct ip_set_req_list *req_save
++			= (struct ip_set_req_list *) data;
++		ip_set_id_t i;
++		int used;
++
++		if (*len < sizeof(struct ip_set_req_list)) {
++			ip_set_printk("short SAVE (want >=%zu, got %d)",
++				      sizeof(struct ip_set_req_list), *len);
++			res = -EINVAL;
++			goto done;
++		}
++		index = req_save->index;
++		if (index != IP_SET_INVALID_ID
++		    && ip_set_find_byindex(index) != index) {
++		    	res = -ENOENT;
++		    	goto done;
++		}
++		used = 0;
++		if (index == IP_SET_INVALID_ID) {
++			/* Save all sets */
++			for (i = 0; i < ip_set_max && res == 0; i++) {
++				if (ip_set_list[i] != NULL)
++					res = ip_set_save_set(i, data, &used, *len);
++			}
++		} else {
++			/* Save an individual set */
++			res = ip_set_save_set(index, data, &used, *len);
++		}
++		if (res == 0)
++			res = ip_set_save_bindings(index, data, &used, *len);
++			
++		if (res != 0)
++			goto done;
++		else if (copylen != used) {
++			res = -EAGAIN;
++			goto done;
++		}
++		goto copy;
++	}
++	case IP_SET_OP_RESTORE: {
++		struct ip_set_req_setnames *req_restore
++			= (struct ip_set_req_setnames *) data;
++		int line;
++
++		if (*len < sizeof(struct ip_set_req_setnames)
++		    || *len != req_restore->size) {
++			ip_set_printk("invalid RESTORE (want =%zu, got %d)",
++				      req_restore->size, *len);
++			res = -EINVAL;
++			goto done;
++		}
++		line = ip_set_restore(data + sizeof(struct ip_set_req_setnames),
++				      req_restore->size - sizeof(struct ip_set_req_setnames));
++		DP("ip_set_restore: %u", line);
++		if (line != 0) {
++			res = -EAGAIN;
++			req_restore->size = line;
++			copylen = sizeof(struct ip_set_req_setnames);
++			goto copy;
++		}
++		goto done;
++	}
++	default:
++		res = -EBADMSG;
++		goto done;
++	}	/* end of switch(op) */
++
++    copy:
++   	DP("set %s, copylen %u", index != IP_SET_INVALID_ID
++   	             		 && ip_set_list[index]
++   	             ? ip_set_list[index]->name
++   	             : ":all:", copylen);
++	if (res == 0)
++		res = copy_to_user(user, data, copylen);
++	else
++		copy_to_user(user, data, copylen);
++    	
++    done:
++	up(&ip_set_app_mutex);
++	vfree(data);
++	if (res > 0)
++		res = 0;
++	DP("final result %d", res);
++	return res;
++}
++
++static struct nf_sockopt_ops so_set = {
++	.pf 		= PF_INET,
++	.set_optmin 	= SO_IP_SET,
++	.set_optmax 	= SO_IP_SET + 1,
++	.set 		= &ip_set_sockfn_set,
++	.get_optmin 	= SO_IP_SET,
++	.get_optmax	= SO_IP_SET + 1,
++	.get		= &ip_set_sockfn_get,
++	.use		= 0
++};
++
++static int max_sets, hash_size;
++MODULE_PARM(max_sets, "i");
++MODULE_PARM_DESC(max_sets, "maximal number of sets");
++MODULE_PARM(hash_size, "i");
++MODULE_PARM_DESC(hash_size, "hash size for bindings");
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
++MODULE_DESCRIPTION("module implementing core IP set support");
++
++static int __init init(void)
++{
++	int res;
++	ip_set_id_t i;
++
++	get_random_bytes(&ip_set_hash_random, 4);
++	if (max_sets)
++		ip_set_max = max_sets;
++	ip_set_list = vmalloc(sizeof(struct ip_set *) * ip_set_max);
++	if (!ip_set_list) {
++		printk(KERN_ERR "Unable to create ip_set_list\n");
++		return -ENOMEM;
++	}
++	memset(ip_set_list, 0, sizeof(struct ip_set *) * ip_set_max);
++	if (hash_size)
++		ip_set_bindings_hash_size = hash_size;
++	ip_set_hash = vmalloc(sizeof(struct list_head) * ip_set_bindings_hash_size);
++	if (!ip_set_hash) {
++		printk(KERN_ERR "Unable to create ip_set_hash\n");
++		vfree(ip_set_list);
++		return -ENOMEM;
++	}
++	for (i = 0; i < ip_set_bindings_hash_size; i++)
++		INIT_LIST_HEAD(&ip_set_hash[i]);
++
++	INIT_LIST_HEAD(&set_type_list);
++
++	res = nf_register_sockopt(&so_set);
++	if (res != 0) {
++		ip_set_printk("SO_SET registry failed: %d", res);
++		vfree(ip_set_list);
++		vfree(ip_set_hash);
++		return res;
++	}
++	return 0;
++}
++
++static void __exit fini(void)
++{
++	/* There can't be any existing set or binding. Racy. */
++	nf_unregister_sockopt(&so_set);
++	vfree(ip_set_list);
++	vfree(ip_set_hash);
++	DP("these are the famous last words");
++}
++
++EXPORT_SYMBOL(ip_set_register_set_type);
++EXPORT_SYMBOL(ip_set_unregister_set_type);
++
++EXPORT_SYMBOL(ip_set_get_byname);
++EXPORT_SYMBOL(ip_set_get_byindex);
++EXPORT_SYMBOL(ip_set_put);
++
++EXPORT_SYMBOL(ip_set_addip_kernel);
++EXPORT_SYMBOL(ip_set_delip_kernel);
++EXPORT_SYMBOL(ip_set_testip_kernel);
++
++module_init(init);
++module_exit(fini);
+diff -Naur linux-old/net/ipv4/netfilter/ip_set_iphash.c linux-new/net/ipv4/netfilter/ip_set_iphash.c
+--- linux-old/net/ipv4/netfilter/ip_set_iphash.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/net/ipv4/netfilter/ip_set_iphash.c	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,379 @@
++/* Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.  
++ */
++
++/* Kernel module implementing an ip hash set */
++
++#include <linux/module.h>
++#include <linux/ip.h>
++#include <linux/skbuff.h>
++#include <linux/netfilter_ipv4/ip_tables.h>
++#include <linux/netfilter_ipv4/ip_set.h>
++#include <linux/errno.h>
++#include <asm/uaccess.h>
++#include <asm/bitops.h>
++#include <asm/softirq.h>
++#include <linux/spinlock.h>
++#include <linux/vmalloc.h>
++#include <linux/random.h>
++
++#include <net/ip.h>
++
++#include <linux/netfilter_ipv4/ip_set_malloc.h>
++#include <linux/netfilter_ipv4/ip_set_iphash.h>
++#include <linux/netfilter_ipv4/ip_set_jhash.h>
++#include <linux/netfilter_ipv4/ip_set_prime.h>
++
++static inline __u32
++jhash_ip(const struct ip_set_iphash *map, ip_set_ip_t ip)
++{
++	return jhash_1word(ip, map->initval);
++}
++
++static inline __u32
++randhash_ip(const struct ip_set_iphash *map, ip_set_ip_t ip)
++{
++	return (1 + ip % map->prime);
++}
++
++static inline __u32
++hash_id(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
++{
++	struct ip_set_iphash *map = (struct ip_set_iphash *) set->data;
++	__u32 jhash, randhash, id;
++	u_int16_t i;
++
++	*hash_ip = ip & map->netmask;
++	jhash = jhash_ip(map, *hash_ip);
++	randhash = randhash_ip(map, *hash_ip);
++	DP("set: %s, ip:%u.%u.%u.%u, %u.%u.%u.%u, %u.%u.%u.%u",
++	   set->name, HIPQUAD(ip), HIPQUAD(*hash_ip), HIPQUAD(map->netmask));
++	
++	for (i = 0; i < map->probes; i++) {
++		id = (jhash + i * randhash) % map->hashsize;
++		DP("hash key: %u", id);
++		if (map->members[id] == *hash_ip)
++			return id;
++		/* No shortcut at testing - there can be deleted
++		 * entries. */
++	}
++	return UINT_MAX;
++}
++
++static inline int
++__testip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
++{
++	return (hash_id(set, ip, hash_ip) != UINT_MAX);
++}
++
++static int
++testip(struct ip_set *set, const void *data, size_t size,
++       ip_set_ip_t *hash_ip)
++{
++	struct ip_set_req_iphash *req = 
++	    (struct ip_set_req_iphash *) data;
++
++	if (size != sizeof(struct ip_set_req_iphash)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_iphash),
++			      size);
++		return -EINVAL;
++	}
++	return __testip(set, req->ip, hash_ip);
++}
++
++static int
++testip_kernel(struct ip_set *set, const struct sk_buff *skb,
++		u_int32_t flags, ip_set_ip_t *hash_ip)
++{
++	return __testip(set,
++			ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr 
++						: skb->nh.iph->daddr),
++			hash_ip);
++}
++
++static inline int
++__addip(struct ip_set_iphash *map, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
++{
++	__u32 jhash, randhash, probe;
++	u_int16_t i;
++
++	*hash_ip = ip & map->netmask;
++	jhash = jhash_ip(map, *hash_ip);
++	randhash = randhash_ip(map, *hash_ip);
++	
++	for (i = 0; i < map->probes; i++) {
++		probe = (jhash + i * randhash) % map->hashsize;
++		if (map->members[probe] == *hash_ip)
++			return -EEXIST;
++		if (!map->members[probe]) {
++			map->members[probe] = *hash_ip;
++			return 0;
++		}
++	}
++	/* Trigger rehashing */
++	return -EAGAIN;
++}
++
++static int
++addip(struct ip_set *set, const void *data, size_t size,
++        ip_set_ip_t *hash_ip)
++{
++	struct ip_set_req_iphash *req = 
++	    (struct ip_set_req_iphash *) data;
++
++	if (size != sizeof(struct ip_set_req_iphash)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_iphash),
++			      size);
++		return -EINVAL;
++	}
++	return __addip((struct ip_set_iphash *) set->data, req->ip, hash_ip);
++}
++
++static int
++addip_kernel(struct ip_set *set, const struct sk_buff *skb,
++	     u_int32_t flags, ip_set_ip_t *hash_ip)
++{
++	return __addip((struct ip_set_iphash *) set->data,
++		       ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr 
++					       : skb->nh.iph->daddr),
++		       hash_ip);
++}
++
++static int retry(struct ip_set *set)
++{
++	struct ip_set_iphash *map = (struct ip_set_iphash *) set->data;
++	ip_set_ip_t hash_ip, *members;
++	u_int32_t i, hashsize;
++	unsigned newbytes;
++	int res;
++	struct ip_set_iphash tmp = {
++		.hashsize = map->hashsize,
++		.probes = map->probes,
++		.resize = map->resize,
++		.netmask = map->netmask,
++	};
++	
++	if (map->resize == 0)
++		return -ERANGE;
++
++    again:
++    	res = 0;
++    	
++	/* Calculate new parameters */
++	get_random_bytes(&tmp.initval, 4);
++	hashsize = tmp.hashsize + (tmp.hashsize * map->resize)/100;
++	if (hashsize == tmp.hashsize)
++		hashsize++;
++	tmp.prime = make_prime(hashsize);
++	
++	ip_set_printk("rehashing of set %s triggered: "
++		      "hashsize grows from %u to %u",
++		      set->name, tmp.hashsize, hashsize);
++	tmp.hashsize = hashsize;
++	
++	newbytes = hashsize * sizeof(ip_set_ip_t);
++	tmp.members = ip_set_malloc(newbytes);
++	if (!tmp.members) {
++		DP("out of memory for %d bytes", newbytes);
++		return -ENOMEM;
++	}
++	memset(tmp.members, 0, newbytes);
++	
++	write_lock_bh(&set->lock);
++	map = (struct ip_set_iphash *) set->data; /* Play safe */
++	for (i = 0; i < map->hashsize && res == 0; i++) {
++		if (map->members[i])
++			res = __addip(&tmp, map->members[i], &hash_ip);
++	}
++	if (res) {
++		/* Failure, try again */
++		write_unlock_bh(&set->lock);
++		ip_set_free(tmp.members, newbytes);
++		goto again;
++	}
++	
++	/* Success at resizing! */
++	members = map->members;
++	hashsize = map->hashsize;
++	
++	map->initval = tmp.initval;
++	map->prime = tmp.prime;
++	map->hashsize = tmp.hashsize;
++	map->members = tmp.members;
++	write_unlock_bh(&set->lock);
++
++	ip_set_free(members, hashsize * sizeof(ip_set_ip_t));
++
++	return 0;
++}
++
++static inline int
++__delip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
++{
++	struct ip_set_iphash *map = (struct ip_set_iphash *) set->data;
++	ip_set_ip_t id = hash_id(set, ip, hash_ip);
++
++	if (id == UINT_MAX)
++		return -EEXIST;
++		
++	map->members[id] = 0;
++	return 0;
++}
++
++static int
++delip(struct ip_set *set, const void *data, size_t size,
++        ip_set_ip_t *hash_ip)
++{
++	struct ip_set_req_iphash *req =
++	    (struct ip_set_req_iphash *) data;
++
++	if (size != sizeof(struct ip_set_req_iphash)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_iphash),
++			      size);
++		return -EINVAL;
++	}
++	return __delip(set, req->ip, hash_ip);
++}
++
++static int
++delip_kernel(struct ip_set *set, const struct sk_buff *skb,
++	       u_int32_t flags, ip_set_ip_t *hash_ip)
++{
++	return __delip(set,
++		       ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr 
++					       : skb->nh.iph->daddr),
++		       hash_ip);
++}
++
++static int create(struct ip_set *set, const void *data, size_t size)
++{
++	unsigned newbytes;
++	struct ip_set_req_iphash_create *req =
++	    (struct ip_set_req_iphash_create *) data;
++	struct ip_set_iphash *map;
++
++	if (size != sizeof(struct ip_set_req_iphash_create)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			       sizeof(struct ip_set_req_iphash_create),
++			       size);
++		return -EINVAL;
++	}
++
++	if (req->hashsize < 1) {
++		ip_set_printk("hashsize too small");
++		return -ENOEXEC;
++	}
++
++	map = kmalloc(sizeof(struct ip_set_iphash), GFP_KERNEL);
++	if (!map) {
++		DP("out of memory for %d bytes",
++		   sizeof(struct ip_set_iphash));
++		return -ENOMEM;
++	}
++	get_random_bytes(&map->initval, 4);
++	map->prime = make_prime(req->hashsize);
++	map->hashsize = req->hashsize;
++	map->probes = req->probes;
++	map->resize = req->resize;
++	map->netmask = req->netmask;
++	newbytes = map->hashsize * sizeof(ip_set_ip_t);
++	map->members = ip_set_malloc(newbytes);
++	if (!map->members) {
++		DP("out of memory for %d bytes", newbytes);
++		kfree(map);
++		return -ENOMEM;
++	}
++	memset(map->members, 0, newbytes);
++
++	set->data = map;
++	return 0;
++}
++
++static void destroy(struct ip_set *set)
++{
++	struct ip_set_iphash *map = (struct ip_set_iphash *) set->data;
++
++	ip_set_free(map->members, map->hashsize * sizeof(ip_set_ip_t));
++	kfree(map);
++
++	set->data = NULL;
++}
++
++static void flush(struct ip_set *set)
++{
++	struct ip_set_iphash *map = (struct ip_set_iphash *) set->data;
++	memset(map->members, 0, map->hashsize * sizeof(ip_set_ip_t));
++}
++
++static void list_header(const struct ip_set *set, void *data)
++{
++	struct ip_set_iphash *map = (struct ip_set_iphash *) set->data;
++	struct ip_set_req_iphash_create *header =
++	    (struct ip_set_req_iphash_create *) data;
++
++	header->hashsize = map->hashsize;
++	header->probes = map->probes;
++	header->resize = map->resize;
++	header->netmask = map->netmask;
++}
++
++static int list_members_size(const struct ip_set *set)
++{
++	struct ip_set_iphash *map = (struct ip_set_iphash *) set->data;
++
++	return (map->hashsize * sizeof(ip_set_ip_t));
++}
++
++static void list_members(const struct ip_set *set, void *data)
++{
++	struct ip_set_iphash *map = (struct ip_set_iphash *) set->data;
++	int bytes = map->hashsize * sizeof(ip_set_ip_t);
++
++	memcpy(data, map->members, bytes);
++}
++
++static struct ip_set_type ip_set_iphash = {
++	.typename		= SETTYPE_NAME,
++	.typecode		= IPSET_TYPE_IP,
++	.protocol_version	= IP_SET_PROTOCOL_VERSION,
++	.create			= &create,
++	.destroy		= &destroy,
++	.flush			= &flush,
++	.reqsize		= sizeof(struct ip_set_req_iphash),
++	.addip			= &addip,
++	.addip_kernel		= &addip_kernel,
++	.retry			= &retry,
++	.delip			= &delip,
++	.delip_kernel		= &delip_kernel,
++	.testip			= &testip,
++	.testip_kernel		= &testip_kernel,
++	.header_size		= sizeof(struct ip_set_req_iphash_create),
++	.list_header		= &list_header,
++	.list_members_size	= &list_members_size,
++	.list_members		= &list_members,
++	.me			= THIS_MODULE,
++};
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
++MODULE_DESCRIPTION("iphash type of IP sets");
++
++static int __init init(void)
++{
++	return ip_set_register_set_type(&ip_set_iphash);
++}
++
++static void __exit fini(void)
++{
++	/* FIXME: possible race with ip_set_create() */
++	ip_set_unregister_set_type(&ip_set_iphash);
++}
++
++module_init(init);
++module_exit(fini);
+diff -Naur linux-old/net/ipv4/netfilter/ip_set_ipmap.c linux-new/net/ipv4/netfilter/ip_set_ipmap.c
+--- linux-old/net/ipv4/netfilter/ip_set_ipmap.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/net/ipv4/netfilter/ip_set_ipmap.c	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,314 @@
++/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
++ *                         Patrick Schaaf <bof@bof.de>
++ * Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.  
++ */
++
++/* Kernel module implementing an IP set type: the single bitmap type */
++
++#include <linux/module.h>
++#include <linux/ip.h>
++#include <linux/skbuff.h>
++#include <linux/netfilter_ipv4/ip_tables.h>
++#include <linux/netfilter_ipv4/ip_set.h>
++#include <linux/errno.h>
++#include <asm/uaccess.h>
++#include <asm/bitops.h>
++#include <asm/softirq.h>
++#include <linux/spinlock.h>
++
++#include <linux/netfilter_ipv4/ip_set_ipmap.h>
++
++static inline ip_set_ip_t
++ip_to_id(const struct ip_set_ipmap *map, ip_set_ip_t ip)
++{
++	return (ip - map->first_ip)/map->hosts;
++}
++
++static inline int
++__testip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
++{
++	struct ip_set_ipmap *map = (struct ip_set_ipmap *) set->data;
++	
++	if (ip < map->first_ip || ip > map->last_ip)
++		return -ERANGE;
++
++	*hash_ip = ip & map->netmask;
++	DP("set: %s, ip:%u.%u.%u.%u, %u.%u.%u.%u",
++	   set->name, HIPQUAD(ip), HIPQUAD(*hash_ip));
++	return !!test_bit(ip_to_id(map, *hash_ip), map->members);
++}
++
++static int
++testip(struct ip_set *set, const void *data, size_t size,
++       ip_set_ip_t *hash_ip)
++{
++	struct ip_set_req_ipmap *req = 
++	    (struct ip_set_req_ipmap *) data;
++
++	if (size != sizeof(struct ip_set_req_ipmap)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_ipmap),
++			      size);
++		return -EINVAL;
++	}
++	return __testip(set, req->ip, hash_ip);
++}
++
++static int
++testip_kernel(struct ip_set *set, 
++	      const struct sk_buff *skb,
++	      u_int32_t flags,
++	      ip_set_ip_t *hash_ip)
++{
++	int res;
++	
++	DP("flag: %s src: %u.%u.%u.%u dst: %u.%u.%u.%u",
++	   flags & IPSET_SRC ? "SRC" : "DST",
++	   NIPQUAD(skb->nh.iph->saddr),
++	   NIPQUAD(skb->nh.iph->daddr));
++
++	res =  __testip(set,
++			ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr 
++						: skb->nh.iph->daddr),
++			hash_ip);
++	return (res < 0 ? 0 : res);
++}
++
++static inline int
++__addip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
++{
++	struct ip_set_ipmap *map = (struct ip_set_ipmap *) set->data;
++
++	if (ip < map->first_ip || ip > map->last_ip)
++		return -ERANGE;
++
++	*hash_ip = ip & map->netmask;
++	DP("%u.%u.%u.%u, %u.%u.%u.%u", HIPQUAD(ip), HIPQUAD(*hash_ip));
++	if (test_and_set_bit(ip_to_id(map, *hash_ip), map->members))
++		return -EEXIST;
++
++	return 0;
++}
++
++static int
++addip(struct ip_set *set, const void *data, size_t size,
++      ip_set_ip_t *hash_ip)
++{
++	struct ip_set_req_ipmap *req = 
++	    (struct ip_set_req_ipmap *) data;
++
++	if (size != sizeof(struct ip_set_req_ipmap)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_ipmap),
++			      size);
++		return -EINVAL;
++	}
++	DP("%u.%u.%u.%u", HIPQUAD(req->ip));
++	return __addip(set, req->ip, hash_ip);
++}
++
++static int
++addip_kernel(struct ip_set *set, const struct sk_buff *skb,
++	     u_int32_t flags, ip_set_ip_t *hash_ip)
++{
++	return __addip(set,
++		       ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr 
++					       : skb->nh.iph->daddr),
++		       hash_ip);
++}
++
++static inline int 
++__delip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
++{
++	struct ip_set_ipmap *map = (struct ip_set_ipmap *) set->data;
++
++	if (ip < map->first_ip || ip > map->last_ip)
++		return -ERANGE;
++
++	*hash_ip = ip & map->netmask;
++	DP("%u.%u.%u.%u, %u.%u.%u.%u", HIPQUAD(ip), HIPQUAD(*hash_ip));
++	if (!test_and_clear_bit(ip_to_id(map, *hash_ip), map->members))
++		return -EEXIST;
++	
++	return 0;
++}
++
++static int
++delip(struct ip_set *set, const void *data, size_t size,
++      ip_set_ip_t *hash_ip)
++{
++	struct ip_set_req_ipmap *req =
++	    (struct ip_set_req_ipmap *) data;
++
++	if (size != sizeof(struct ip_set_req_ipmap)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_ipmap),
++			      size);
++		return -EINVAL;
++	}
++	return __delip(set, req->ip, hash_ip);
++}
++
++static int
++delip_kernel(struct ip_set *set, const struct sk_buff *skb,
++	     u_int32_t flags, ip_set_ip_t *hash_ip)
++{
++	return __delip(set,
++		       ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr 
++					       : skb->nh.iph->daddr),
++		       hash_ip);
++}
++
++static int create(struct ip_set *set, const void *data, size_t size)
++{
++	int newbytes;
++	struct ip_set_req_ipmap_create *req =
++	    (struct ip_set_req_ipmap_create *) data;
++	struct ip_set_ipmap *map;
++
++	if (size != sizeof(struct ip_set_req_ipmap_create)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_ipmap_create),
++			      size);
++		return -EINVAL;
++	}
++
++	DP("from %u.%u.%u.%u to %u.%u.%u.%u",
++	   HIPQUAD(req->from), HIPQUAD(req->to));
++
++	if (req->from > req->to) {
++		DP("bad ip range");
++		return -ENOEXEC;
++	}
++
++	if (req->to - req->from > MAX_RANGE) {
++		ip_set_printk("range too big (max %d addresses)",
++			       MAX_RANGE);
++		return -ENOEXEC;
++	}
++
++	map = kmalloc(sizeof(struct ip_set_ipmap), GFP_KERNEL);
++	if (!map) {
++		DP("out of memory for %d bytes",
++		   sizeof(struct ip_set_ipmap));
++		return -ENOMEM;
++	}
++	map->first_ip = req->from;
++	map->last_ip = req->to;
++	map->netmask = req->netmask;
++
++	if (req->netmask == 0xFFFFFFFF) {
++		map->hosts = 1;
++		map->sizeid = map->last_ip - map->first_ip + 1;
++	} else {
++		unsigned int mask_bits, netmask_bits;
++		ip_set_ip_t mask;
++		
++		map->first_ip &= map->netmask;	/* Should we better bark? */
++		
++		mask = range_to_mask(map->first_ip, map->last_ip, &mask_bits);
++		netmask_bits = mask_to_bits(map->netmask);
++		
++		if (!mask || netmask_bits <= mask_bits)
++			return -ENOEXEC;
++
++		map->hosts = 2 << (32 - netmask_bits - 1);
++		map->sizeid = 2 << (netmask_bits - mask_bits - 1);
++	}
++	newbytes = bitmap_bytes(0, map->sizeid - 1);
++	map->members = kmalloc(newbytes, GFP_KERNEL);
++	if (!map->members) {
++		DP("out of memory for %d bytes", newbytes);
++		kfree(map);
++		return -ENOMEM;
++	}
++	memset(map->members, 0, newbytes);
++	
++	set->data = map;
++	return 0;
++}
++
++static void destroy(struct ip_set *set)
++{
++	struct ip_set_ipmap *map = (struct ip_set_ipmap *) set->data;
++	
++	kfree(map->members);
++	kfree(map);
++	
++	set->data = NULL;
++}
++
++static void flush(struct ip_set *set)
++{
++	struct ip_set_ipmap *map = (struct ip_set_ipmap *) set->data;
++	memset(map->members, 0, bitmap_bytes(0, map->sizeid - 1));
++}
++
++static void list_header(const struct ip_set *set, void *data)
++{
++	struct ip_set_ipmap *map = (struct ip_set_ipmap *) set->data;
++	struct ip_set_req_ipmap_create *header =
++	    (struct ip_set_req_ipmap_create *) data;
++
++	header->from = map->first_ip;
++	header->to = map->last_ip;
++	header->netmask = map->netmask;
++}
++
++static int list_members_size(const struct ip_set *set)
++{
++	struct ip_set_ipmap *map = (struct ip_set_ipmap *) set->data;
++
++	return bitmap_bytes(0, map->sizeid - 1);
++}
++
++static void list_members(const struct ip_set *set, void *data)
++{
++	struct ip_set_ipmap *map = (struct ip_set_ipmap *) set->data;
++	int bytes = bitmap_bytes(0, map->sizeid - 1);
++
++	memcpy(data, map->members, bytes);
++}
++
++static struct ip_set_type ip_set_ipmap = {
++	.typename		= SETTYPE_NAME,
++	.typecode		= IPSET_TYPE_IP,
++	.protocol_version	= IP_SET_PROTOCOL_VERSION,
++	.create			= &create,
++	.destroy		= &destroy,
++	.flush			= &flush,
++	.reqsize		= sizeof(struct ip_set_req_ipmap),
++	.addip			= &addip,
++	.addip_kernel		= &addip_kernel,
++	.delip			= &delip,
++	.delip_kernel		= &delip_kernel,
++	.testip			= &testip,
++	.testip_kernel		= &testip_kernel,
++	.header_size		= sizeof(struct ip_set_req_ipmap_create),
++	.list_header		= &list_header,
++	.list_members_size	= &list_members_size,
++	.list_members		= &list_members,
++	.me			= THIS_MODULE,
++};
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
++MODULE_DESCRIPTION("ipmap type of IP sets");
++
++static int __init init(void)
++{
++	return ip_set_register_set_type(&ip_set_ipmap);
++}
++
++static void __exit fini(void)
++{
++	/* FIXME: possible race with ip_set_create() */
++	ip_set_unregister_set_type(&ip_set_ipmap);
++}
++
++module_init(init);
++module_exit(fini);
+diff -Naur linux-old/net/ipv4/netfilter/ip_set_iptree.c linux-new/net/ipv4/netfilter/ip_set_iptree.c
+--- linux-old/net/ipv4/netfilter/ip_set_iptree.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/net/ipv4/netfilter/ip_set_iptree.c	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,511 @@
++/* Copyright (C) 2005 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.  
++ */
++
++/* Kernel module implementing an IP set type: the iptree type */
++
++#include <linux/module.h>
++#include <linux/ip.h>
++#include <linux/skbuff.h>
++#include <linux/slab.h>
++#include <linux/delay.h>
++#include <linux/netfilter_ipv4/ip_tables.h>
++#include <linux/netfilter_ipv4/ip_set.h>
++#include <linux/errno.h>
++#include <asm/uaccess.h>
++#include <asm/bitops.h>
++#include <linux/interrupt.h>
++#include <linux/spinlock.h>
++
++#include <linux/netfilter_ipv4/ip_set_iptree.h>
++
++/* Garbage collection interval in seconds: */
++#define IPTREE_GC_TIME		5*60
++/* Sleep so many milliseconds before trying again 
++ * to delete the gc timer at destroying a set */ 
++#define IPTREE_DESTROY_SLEEP	100
++
++static kmem_cache_t *branch_cachep;
++static kmem_cache_t *leaf_cachep;
++
++#define ABCD(a,b,c,d,addrp) do {		\
++	a = ((unsigned char *)addrp)[3];	\
++	b = ((unsigned char *)addrp)[2];	\
++	c = ((unsigned char *)addrp)[1];	\
++	d = ((unsigned char *)addrp)[0];	\
++} while (0)
++
++#define TESTIP_WALK(map, elem, branch) do {	\
++	if ((map)->tree[elem]) {		\
++		branch = (map)->tree[elem];	\
++	} else 					\
++		return 0;			\
++} while (0)
++
++static inline int
++__testip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
++{
++	struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
++	struct ip_set_iptreeb *btree;
++	struct ip_set_iptreec *ctree;
++	struct ip_set_iptreed *dtree;
++	unsigned char a,b,c,d;
++	
++	*hash_ip = ip;
++	ABCD(a, b, c, d, hash_ip);
++	DP("%u %u %u %u timeout %u", a, b, c, d, map->timeout);
++	TESTIP_WALK(map, a, btree);
++	TESTIP_WALK(btree, b, ctree);
++	TESTIP_WALK(ctree, c, dtree);
++	DP("%lu %lu", dtree->expires[d], jiffies);
++	return !!(map->timeout ? (time_after(dtree->expires[d], jiffies))
++			       : dtree->expires[d]);
++}
++
++static int
++testip(struct ip_set *set, const void *data, size_t size,
++       ip_set_ip_t *hash_ip)
++{
++	struct ip_set_req_iptree *req = 
++	    (struct ip_set_req_iptree *) data;
++
++	if (size != sizeof(struct ip_set_req_iptree)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_iptree),
++			      size);
++		return -EINVAL;
++	}
++	return __testip(set, req->ip, hash_ip);
++}
++
++static int
++testip_kernel(struct ip_set *set, 
++	      const struct sk_buff *skb,
++	      u_int32_t flags,
++	      ip_set_ip_t *hash_ip)
++{
++	int res;
++	
++	DP("flag: %s src: %u.%u.%u.%u dst: %u.%u.%u.%u",
++	   flags & IPSET_SRC ? "SRC" : "DST",
++	   NIPQUAD(skb->nh.iph->saddr),
++	   NIPQUAD(skb->nh.iph->daddr));
++
++	res =  __testip(set,
++			ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr 
++						: skb->nh.iph->daddr),
++			hash_ip);
++	return (res < 0 ? 0 : res);
++}
++
++#define ADDIP_WALK(map, elem, branch, type, cachep) do {	\
++	if ((map)->tree[elem]) {				\
++		DP("found %u", elem);				\
++		branch = (map)->tree[elem];			\
++	} else {						\
++		branch = (type *)				\
++			kmem_cache_alloc(cachep, GFP_KERNEL);	\
++		if (branch == NULL)				\
++			return -ENOMEM;				\
++		memset(branch, 0, sizeof(*branch));		\
++		(map)->tree[elem] = branch;			\
++		DP("alloc %u", elem);				\
++	}							\
++} while (0)	
++
++static inline int
++__addip(struct ip_set *set, ip_set_ip_t ip, unsigned int timeout,
++	ip_set_ip_t *hash_ip)
++{
++	struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
++	struct ip_set_iptreeb *btree;
++	struct ip_set_iptreec *ctree;
++	struct ip_set_iptreed *dtree;
++	unsigned char a,b,c,d;
++	int ret = 0;
++	
++	*hash_ip = ip;
++	ABCD(a, b, c, d, hash_ip);
++	DP("%u %u %u %u timeout %u", a, b, c, d, timeout);
++	ADDIP_WALK(map, a, btree, struct ip_set_iptreeb, branch_cachep);
++	ADDIP_WALK(btree, b, ctree, struct ip_set_iptreec, branch_cachep);
++	ADDIP_WALK(ctree, c, dtree, struct ip_set_iptreed, leaf_cachep);
++	if (dtree->expires[d]
++	    && (!map->timeout || time_after(dtree->expires[d], jiffies)))
++	    	ret = -EEXIST;
++	dtree->expires[d] = map->timeout ? (timeout * HZ + jiffies) : 1;
++	DP("%u %lu", d, dtree->expires[d]);
++	return ret;
++}
++
++static int
++addip(struct ip_set *set, const void *data, size_t size,
++      ip_set_ip_t *hash_ip)
++{
++	struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
++	struct ip_set_req_iptree *req = 
++		(struct ip_set_req_iptree *) data;
++
++	if (size != sizeof(struct ip_set_req_iptree)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_iptree),
++			      size);
++		return -EINVAL;
++	}
++	DP("%u.%u.%u.%u %u", HIPQUAD(req->ip), req->timeout);
++	return __addip(set, req->ip,
++		       req->timeout ? req->timeout : map->timeout,
++		       hash_ip);
++}
++
++static int
++addip_kernel(struct ip_set *set, const struct sk_buff *skb,
++	     u_int32_t flags, ip_set_ip_t *hash_ip)
++{
++	struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
++
++	return __addip(set,
++		       ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr 
++					       : skb->nh.iph->daddr),
++		       map->timeout,
++		       hash_ip);
++}
++
++#define DELIP_WALK(map, elem, branch) do {	\
++	if ((map)->tree[elem]) {		\
++		branch = (map)->tree[elem];	\
++	} else 					\
++		return -EEXIST;			\
++} while (0)
++
++static inline int 
++__delip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
++{
++	struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
++	struct ip_set_iptreeb *btree;
++	struct ip_set_iptreec *ctree;
++	struct ip_set_iptreed *dtree;
++	unsigned char a,b,c,d;
++	
++	*hash_ip = ip;
++	ABCD(a, b, c, d, hash_ip);
++	DELIP_WALK(map, a, btree);
++	DELIP_WALK(btree, b, ctree);
++	DELIP_WALK(ctree, c, dtree);
++
++	if (dtree->expires[d]) {
++		dtree->expires[d] = 0;
++		return 0;
++	}
++	return -EEXIST;
++}
++
++static int
++delip(struct ip_set *set, const void *data, size_t size,
++      ip_set_ip_t *hash_ip)
++{
++	struct ip_set_req_iptree *req =
++	    (struct ip_set_req_iptree *) data;
++
++	if (size != sizeof(struct ip_set_req_iptree)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_iptree),
++			      size);
++		return -EINVAL;
++	}
++	return __delip(set, req->ip, hash_ip);
++}
++
++static int
++delip_kernel(struct ip_set *set, const struct sk_buff *skb,
++	     u_int32_t flags, ip_set_ip_t *hash_ip)
++{
++	return __delip(set,
++		       ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr 
++					       : skb->nh.iph->daddr),
++		       hash_ip);
++}
++
++#define LOOP_WALK_BEGIN(map, i, branch) \
++	for (i = 0; i < 255; i++) {	\
++		if (!(map)->tree[i])	\
++			continue;	\
++		branch = (map)->tree[i]
++
++#define LOOP_WALK_END }
++
++static void ip_tree_gc(unsigned long ul_set)
++{
++	struct ip_set *set = (void *) ul_set;
++	struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
++	struct ip_set_iptreeb *btree;
++	struct ip_set_iptreec *ctree;
++	struct ip_set_iptreed *dtree;
++	unsigned char a,b,c,d;
++	unsigned char i,j,k;
++
++	i = j = k = 0;
++	DP("gc: %s", set->name);
++	write_lock_bh(&set->lock);
++	LOOP_WALK_BEGIN(map, a, btree);
++	LOOP_WALK_BEGIN(btree, b, ctree);
++	LOOP_WALK_BEGIN(ctree, c, dtree);
++	for (d = 0; d < 255; d++) {
++		if (dtree->expires[d]) {
++			DP("gc: %u %u %u %u: expires %lu jiffies %lu",
++			    a, b, c, d,
++			    dtree->expires[d], jiffies);
++			if (map->timeout
++			    && time_before(dtree->expires[d], jiffies))
++			    	dtree->expires[d] = 0;
++			else
++				k = 1;
++		}
++	}
++	if (k == 0) {
++		DP("gc: %s: leaf %u %u %u empty",
++		    set->name, a, b, c);
++		kmem_cache_free(leaf_cachep, dtree);
++		ctree->tree[c] = NULL;
++	} else {
++		DP("gc: %s: leaf %u %u %u not empty",
++		    set->name, a, b, c);
++		j = 1;
++		k = 0;
++	}
++	LOOP_WALK_END;
++	if (j == 0) {
++		DP("gc: %s: branch %u %u empty",
++		    set->name, a, b);
++		kmem_cache_free(branch_cachep, ctree);
++		btree->tree[b] = NULL;
++	} else {
++		DP("gc: %s: branch %u %u not empty",
++		    set->name, a, b);
++		i = 1;
++		j = k = 0;
++	}
++	LOOP_WALK_END;
++	if (i == 0) {
++		DP("gc: %s: branch %u empty",
++		    set->name, a);
++		kmem_cache_free(branch_cachep, btree);
++		map->tree[a] = NULL;
++	} else {
++		DP("gc: %s: branch %u not empty",
++		    set->name, a);
++		i = j = k = 0;
++	}
++	LOOP_WALK_END;
++	write_unlock_bh(&set->lock);
++	
++	map->gc.expires = jiffies + map->gc_interval * HZ;
++	add_timer(&map->gc);
++}
++
++static int create(struct ip_set *set, const void *data, size_t size)
++{
++	struct ip_set_req_iptree_create *req =
++	    (struct ip_set_req_iptree_create *) data;
++	struct ip_set_iptree *map;
++
++	if (size != sizeof(struct ip_set_req_iptree_create)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_iptree_create),
++			      size);
++		return -EINVAL;
++	}
++
++	map = kmalloc(sizeof(struct ip_set_iptree), GFP_KERNEL);
++	if (!map) {
++		DP("out of memory for %d bytes",
++		   sizeof(struct ip_set_iptree));
++		return -ENOMEM;
++	}
++	memset(map, 0, sizeof(*map));
++	map->timeout = req->timeout;
++	set->data = map;
++
++	/* If there is no timeout for the entries,
++	 * we still have to call gc because delete
++	 * do not clean up empty branches */
++	map->gc_interval = IPTREE_GC_TIME;
++	init_timer(&map->gc);
++	map->gc.data = (unsigned long) set;
++	map->gc.function = ip_tree_gc;
++	map->gc.expires = jiffies + map->gc_interval * HZ;
++	add_timer(&map->gc);
++	
++	return 0;
++}
++
++static void __flush(struct ip_set_iptree *map)
++{
++	struct ip_set_iptreeb *btree;
++	struct ip_set_iptreec *ctree;
++	struct ip_set_iptreed *dtree;
++	unsigned int a,b,c;
++
++	LOOP_WALK_BEGIN(map, a, btree);
++	LOOP_WALK_BEGIN(btree, b, ctree);
++	LOOP_WALK_BEGIN(ctree, c, dtree);
++	kmem_cache_free(leaf_cachep, dtree);
++	LOOP_WALK_END;
++	kmem_cache_free(branch_cachep, ctree);
++	LOOP_WALK_END;
++	kmem_cache_free(branch_cachep, btree);
++	LOOP_WALK_END;
++}
++
++static void destroy(struct ip_set *set)
++{
++	struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
++
++	while (!del_timer(&map->gc))
++		msleep(IPTREE_DESTROY_SLEEP);
++	__flush(map);
++	kfree(map);
++	set->data = NULL;
++}
++
++static void flush(struct ip_set *set)
++{
++	struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
++	unsigned int timeout = map->timeout;
++	
++	__flush(map);
++	memset(map, 0, sizeof(*map));
++	map->timeout = timeout;
++}
++
++static void list_header(const struct ip_set *set, void *data)
++{
++	struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
++	struct ip_set_req_iptree_create *header =
++	    (struct ip_set_req_iptree_create *) data;
++
++	header->timeout = map->timeout;
++}
++
++static int list_members_size(const struct ip_set *set)
++{
++	struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
++	struct ip_set_iptreeb *btree;
++	struct ip_set_iptreec *ctree;
++	struct ip_set_iptreed *dtree;
++	unsigned char a,b,c,d;
++	unsigned int count = 0;
++
++	LOOP_WALK_BEGIN(map, a, btree);
++	LOOP_WALK_BEGIN(btree, b, ctree);
++	LOOP_WALK_BEGIN(ctree, c, dtree);
++	for (d = 0; d < 255; d++) {
++		if (dtree->expires[d]
++		    && (!map->timeout || time_after(dtree->expires[d], jiffies)))
++		    	count++;
++	}
++	LOOP_WALK_END;
++	LOOP_WALK_END;
++	LOOP_WALK_END;
++
++	DP("members %u", count);
++	return (count * sizeof(struct ip_set_req_iptree));
++}
++
++static void list_members(const struct ip_set *set, void *data)
++{
++	struct ip_set_iptree *map = (struct ip_set_iptree *) set->data;
++	struct ip_set_iptreeb *btree;
++	struct ip_set_iptreec *ctree;
++	struct ip_set_iptreed *dtree;
++	unsigned char a,b,c,d;
++	size_t offset = 0;
++	struct ip_set_req_iptree *entry;
++
++	LOOP_WALK_BEGIN(map, a, btree);
++	LOOP_WALK_BEGIN(btree, b, ctree);
++	LOOP_WALK_BEGIN(ctree, c, dtree);
++	for (d = 0; d < 255; d++) {
++		if (dtree->expires[d]
++		    && (!map->timeout || time_after(dtree->expires[d], jiffies))) {
++		    	entry = (struct ip_set_req_iptree *)(data + offset);
++		    	entry->ip = ((a << 24) | (b << 16) | (c << 8) | d);
++		    	entry->timeout = !map->timeout ? 0 
++				: (dtree->expires[d] - jiffies)/HZ;
++			offset += sizeof(struct ip_set_req_iptree);
++		}
++	}
++	LOOP_WALK_END;
++	LOOP_WALK_END;
++	LOOP_WALK_END;
++}
++
++static struct ip_set_type ip_set_iptree = {
++	.typename		= SETTYPE_NAME,
++	.typecode		= IPSET_TYPE_IP,
++	.protocol_version	= IP_SET_PROTOCOL_VERSION,
++	.create			= &create,
++	.destroy		= &destroy,
++	.flush			= &flush,
++	.reqsize		= sizeof(struct ip_set_req_iptree),
++	.addip			= &addip,
++	.addip_kernel		= &addip_kernel,
++	.delip			= &delip,
++	.delip_kernel		= &delip_kernel,
++	.testip			= &testip,
++	.testip_kernel		= &testip_kernel,
++	.header_size		= sizeof(struct ip_set_req_iptree_create),
++	.list_header		= &list_header,
++	.list_members_size	= &list_members_size,
++	.list_members		= &list_members,
++	.me			= THIS_MODULE,
++};
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
++MODULE_DESCRIPTION("iptree type of IP sets");
++
++static int __init init(void)
++{
++	int ret;
++	
++	branch_cachep = kmem_cache_create("ip_set_iptreeb",
++				sizeof(struct ip_set_iptreeb),
++				0, 0, NULL, NULL);
++	if (!branch_cachep) {
++		printk(KERN_ERR "Unable to create ip_set_iptreeb slab cache\n");
++		ret = -ENOMEM;
++		goto out;
++	}
++	leaf_cachep = kmem_cache_create("ip_set_iptreed",
++				sizeof(struct ip_set_iptreed),
++				0, 0, NULL, NULL);
++	if (!leaf_cachep) {
++		printk(KERN_ERR "Unable to create ip_set_iptreed slab cache\n");
++		ret = -ENOMEM;
++		goto free_branch;
++	}
++	ret = ip_set_register_set_type(&ip_set_iptree);
++	if (ret == 0)
++		goto out;
++
++	kmem_cache_destroy(leaf_cachep);
++    free_branch:	
++	kmem_cache_destroy(branch_cachep);
++    out:
++	return ret;
++}
++
++static void __exit fini(void)
++{
++	/* FIXME: possible race with ip_set_create() */
++	ip_set_unregister_set_type(&ip_set_iptree);
++	kmem_cache_destroy(leaf_cachep);
++	kmem_cache_destroy(branch_cachep);
++}
++
++module_init(init);
++module_exit(fini);
+diff -Naur linux-old/net/ipv4/netfilter/ip_set_macipmap.c linux-new/net/ipv4/netfilter/ip_set_macipmap.c
+--- linux-old/net/ipv4/netfilter/ip_set_macipmap.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/net/ipv4/netfilter/ip_set_macipmap.c	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,340 @@
++/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
++ *                         Patrick Schaaf <bof@bof.de>
++ *                         Martin Josefsson <gandalf@wlug.westbo.se>
++ * Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.  
++ */
++
++/* Kernel module implementing an IP set type: the macipmap type */
++
++#include <linux/module.h>
++#include <linux/ip.h>
++#include <linux/skbuff.h>
++#include <linux/netfilter_ipv4/ip_tables.h>
++#include <linux/netfilter_ipv4/ip_set.h>
++#include <linux/errno.h>
++#include <asm/uaccess.h>
++#include <asm/bitops.h>
++#include <asm/softirq.h>
++#include <linux/spinlock.h>
++#include <linux/if_ether.h>
++#include <linux/vmalloc.h>
++
++#include <linux/netfilter_ipv4/ip_set_malloc.h>
++#include <linux/netfilter_ipv4/ip_set_macipmap.h>
++
++static int
++testip(struct ip_set *set, const void *data, size_t size, ip_set_ip_t *hash_ip)
++{
++	struct ip_set_macipmap *map = (struct ip_set_macipmap *) set->data;
++	struct ip_set_macip *table = (struct ip_set_macip *) map->members;	
++	struct ip_set_req_macipmap *req = (struct ip_set_req_macipmap *) data;
++
++	if (size != sizeof(struct ip_set_req_macipmap)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_macipmap),
++			      size);
++		return -EINVAL;
++	}
++
++	if (req->ip < map->first_ip || req->ip > map->last_ip)
++		return -ERANGE;
++
++	*hash_ip = req->ip;
++	DP("set: %s, ip:%u.%u.%u.%u, %u.%u.%u.%u",
++	   set->name, HIPQUAD(req->ip), HIPQUAD(*hash_ip));		
++	if (test_bit(IPSET_MACIP_ISSET,
++		     &table[req->ip - map->first_ip].flags)) {
++		return (memcmp(req->ethernet,
++			       &table[req->ip - map->first_ip].ethernet,
++			       ETH_ALEN) == 0);
++	} else {
++		return (map->flags & IPSET_MACIP_MATCHUNSET ? 1 : 0);
++	}
++}
++
++static int
++testip_kernel(struct ip_set *set, const struct sk_buff *skb,
++	      u_int32_t flags, ip_set_ip_t *hash_ip)
++{
++	struct ip_set_macipmap *map =
++	    (struct ip_set_macipmap *) set->data;
++	struct ip_set_macip *table =
++	    (struct ip_set_macip *) map->members;
++	ip_set_ip_t ip;
++	
++	ip = ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
++				     : skb->nh.iph->daddr);
++	DP("flag: %s src: %u.%u.%u.%u dst: %u.%u.%u.%u",
++	   flags & IPSET_SRC ? "SRC" : "DST",
++	   NIPQUAD(skb->nh.iph->saddr),
++	   NIPQUAD(skb->nh.iph->daddr));
++
++	if (ip < map->first_ip || ip > map->last_ip)
++		return 0;
++
++	*hash_ip = ip;	
++	DP("set: %s, ip:%u.%u.%u.%u, %u.%u.%u.%u",
++	   set->name, HIPQUAD(ip), HIPQUAD(*hash_ip));		
++	if (test_bit(IPSET_MACIP_ISSET, &table[ip - map->first_ip].flags)) {
++		/* Is mac pointer valid?
++		 * If so, compare... */
++		return (skb->mac.raw >= skb->head
++			&& (skb->mac.raw + ETH_HLEN) <= skb->data
++			&& (memcmp(skb->mac.ethernet->h_source,
++				   &table[ip - map->first_ip].ethernet,
++				   ETH_ALEN) == 0));
++	} else {
++		return (map->flags & IPSET_MACIP_MATCHUNSET ? 1 : 0);
++	}
++}
++
++/* returns 0 on success */
++static inline int
++__addip(struct ip_set *set, 
++	ip_set_ip_t ip, unsigned char *ethernet, ip_set_ip_t *hash_ip)
++{
++	struct ip_set_macipmap *map =
++	    (struct ip_set_macipmap *) set->data;
++	struct ip_set_macip *table =
++	    (struct ip_set_macip *) map->members;
++
++	if (ip < map->first_ip || ip > map->last_ip)
++		return -ERANGE;
++	if (test_and_set_bit(IPSET_MACIP_ISSET, 
++			     &table[ip - map->first_ip].flags))
++		return -EEXIST;
++
++	*hash_ip = ip;
++	DP("%u.%u.%u.%u, %u.%u.%u.%u", HIPQUAD(ip), HIPQUAD(*hash_ip));
++	memcpy(&table[ip - map->first_ip].ethernet, ethernet, ETH_ALEN);
++	return 0;
++}
++
++static int
++addip(struct ip_set *set, const void *data, size_t size,
++      ip_set_ip_t *hash_ip)
++{
++	struct ip_set_req_macipmap *req =
++	    (struct ip_set_req_macipmap *) data;
++
++	if (size != sizeof(struct ip_set_req_macipmap)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_macipmap),
++			      size);
++		return -EINVAL;
++	}
++	return __addip(set, req->ip, req->ethernet, hash_ip);
++}
++
++static int
++addip_kernel(struct ip_set *set, const struct sk_buff *skb,
++	     u_int32_t flags, ip_set_ip_t *hash_ip)
++{
++	ip_set_ip_t ip;
++	
++	ip = ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
++				     : skb->nh.iph->daddr);
++
++	if (!(skb->mac.raw >= skb->head
++	      && (skb->mac.raw + ETH_HLEN) <= skb->data))
++		return -EINVAL;
++
++	return __addip(set, ip, skb->mac.ethernet->h_source, hash_ip);
++}
++
++static inline int
++__delip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
++{
++	struct ip_set_macipmap *map =
++	    (struct ip_set_macipmap *) set->data;
++	struct ip_set_macip *table =
++	    (struct ip_set_macip *) map->members;
++
++	if (ip < map->first_ip || ip > map->last_ip)
++		return -ERANGE;
++	if (!test_and_clear_bit(IPSET_MACIP_ISSET, 
++				&table[ip - map->first_ip].flags))
++		return -EEXIST;
++
++	*hash_ip = ip;
++	DP("%u.%u.%u.%u, %u.%u.%u.%u", HIPQUAD(ip), HIPQUAD(*hash_ip));
++	return 0;
++}
++
++static int
++delip(struct ip_set *set, const void *data, size_t size,
++     ip_set_ip_t *hash_ip)
++{
++	struct ip_set_req_macipmap *req =
++	    (struct ip_set_req_macipmap *) data;
++
++	if (size != sizeof(struct ip_set_req_macipmap)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_macipmap),
++			      size);
++		return -EINVAL;
++	}
++	return __delip(set, req->ip, hash_ip);
++}
++
++static int
++delip_kernel(struct ip_set *set, const struct sk_buff *skb,
++	     u_int32_t flags, ip_set_ip_t *hash_ip)
++{
++	return __delip(set,
++		       ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr 
++					       : skb->nh.iph->daddr),
++		       hash_ip);
++}
++
++static inline size_t members_size(ip_set_id_t from, ip_set_id_t to)
++{
++	return (size_t)((to - from + 1) * sizeof(struct ip_set_macip));
++}
++
++static int create(struct ip_set *set, const void *data, size_t size)
++{
++	int newbytes;
++	struct ip_set_req_macipmap_create *req =
++	    (struct ip_set_req_macipmap_create *) data;
++	struct ip_set_macipmap *map;
++
++	if (size != sizeof(struct ip_set_req_macipmap_create)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_macipmap_create),
++			      size);
++		return -EINVAL;
++	}
++
++	DP("from %u.%u.%u.%u to %u.%u.%u.%u",
++	   HIPQUAD(req->from), HIPQUAD(req->to));
++
++	if (req->from > req->to) {
++		DP("bad ip range");
++		return -ENOEXEC;
++	}
++
++	if (req->to - req->from > MAX_RANGE) {
++		ip_set_printk("range too big (max %d addresses)",
++			       MAX_RANGE);
++		return -ENOEXEC;
++	}
++
++	map = kmalloc(sizeof(struct ip_set_macipmap), GFP_KERNEL);
++	if (!map) {
++		DP("out of memory for %d bytes",
++		   sizeof(struct ip_set_macipmap));
++		return -ENOMEM;
++	}
++	map->flags = req->flags;
++	map->first_ip = req->from;
++	map->last_ip = req->to;
++	newbytes = members_size(map->first_ip, map->last_ip);
++	map->members = ip_set_malloc(newbytes);
++	DP("members: %u %p", newbytes, map->members);
++	if (!map->members) {
++		DP("out of memory for %d bytes", newbytes);
++		kfree(map);
++		return -ENOMEM;
++	}
++	memset(map->members, 0, newbytes);
++	
++	set->data = map;
++	return 0;
++}
++
++static void destroy(struct ip_set *set)
++{
++	struct ip_set_macipmap *map =
++	    (struct ip_set_macipmap *) set->data;
++
++	ip_set_free(map->members, members_size(map->first_ip, map->last_ip));
++	kfree(map);
++
++	set->data = NULL;
++}
++
++static void flush(struct ip_set *set)
++{
++	struct ip_set_macipmap *map =
++	    (struct ip_set_macipmap *) set->data;
++	memset(map->members, 0, members_size(map->first_ip, map->last_ip));
++}
++
++static void list_header(const struct ip_set *set, void *data)
++{
++	struct ip_set_macipmap *map =
++	    (struct ip_set_macipmap *) set->data;
++	struct ip_set_req_macipmap_create *header =
++	    (struct ip_set_req_macipmap_create *) data;
++
++	DP("list_header %x %x %u", map->first_ip, map->last_ip,
++	   map->flags);
++
++	header->from = map->first_ip;
++	header->to = map->last_ip;
++	header->flags = map->flags;
++}
++
++static int list_members_size(const struct ip_set *set)
++{
++	struct ip_set_macipmap *map =
++	    (struct ip_set_macipmap *) set->data;
++
++	DP("%u", members_size(map->first_ip, map->last_ip));
++	return members_size(map->first_ip, map->last_ip);
++}
++
++static void list_members(const struct ip_set *set, void *data)
++{
++	struct ip_set_macipmap *map =
++	    (struct ip_set_macipmap *) set->data;
++
++	int bytes = members_size(map->first_ip, map->last_ip);
++
++	DP("members: %u %p", bytes, map->members);
++	memcpy(data, map->members, bytes);
++}
++
++static struct ip_set_type ip_set_macipmap = {
++	.typename		= SETTYPE_NAME,
++	.typecode		= IPSET_TYPE_IP,
++	.protocol_version	= IP_SET_PROTOCOL_VERSION,
++	.create			= &create,
++	.destroy		= &destroy,
++	.flush			= &flush,
++	.reqsize		= sizeof(struct ip_set_req_macipmap),
++	.addip			= &addip,
++	.addip_kernel		= &addip_kernel,
++	.delip			= &delip,
++	.delip_kernel		= &delip_kernel,
++	.testip			= &testip,
++	.testip_kernel		= &testip_kernel,
++	.header_size		= sizeof(struct ip_set_req_macipmap_create),
++	.list_header		= &list_header,
++	.list_members_size	= &list_members_size,
++	.list_members		= &list_members,
++	.me			= THIS_MODULE,
++};
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
++MODULE_DESCRIPTION("macipmap type of IP sets");
++
++static int __init init(void)
++{
++	return ip_set_register_set_type(&ip_set_macipmap);
++}
++
++static void __exit fini(void)
++{
++	/* FIXME: possible race with ip_set_create() */
++	ip_set_unregister_set_type(&ip_set_macipmap);
++}
++
++module_init(init);
++module_exit(fini);
+diff -Naur linux-old/net/ipv4/netfilter/ip_set_nethash.c linux-new/net/ipv4/netfilter/ip_set_nethash.c
+--- linux-old/net/ipv4/netfilter/ip_set_nethash.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/net/ipv4/netfilter/ip_set_nethash.c	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,450 @@
++/* Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.  
++ */
++
++/* Kernel module implementing a cidr nethash set */
++
++#include <linux/module.h>
++#include <linux/ip.h>
++#include <linux/skbuff.h>
++#include <linux/netfilter_ipv4/ip_tables.h>
++#include <linux/netfilter_ipv4/ip_set.h>
++#include <linux/errno.h>
++#include <asm/uaccess.h>
++#include <asm/bitops.h>
++#include <asm/softirq.h>
++#include <linux/spinlock.h>
++#include <linux/vmalloc.h>
++#include <linux/random.h>
++
++#include <net/ip.h>
++
++#include <linux/netfilter_ipv4/ip_set_malloc.h>
++#include <linux/netfilter_ipv4/ip_set_nethash.h>
++#include <linux/netfilter_ipv4/ip_set_jhash.h>
++#include <linux/netfilter_ipv4/ip_set_prime.h>
++
++static inline __u32
++jhash_ip(const struct ip_set_nethash *map, ip_set_ip_t ip)
++{
++	return jhash_1word(ip, map->initval);
++}
++
++static inline __u32
++randhash_ip(const struct ip_set_nethash *map, ip_set_ip_t ip)
++{
++	return (1 + ip % map->prime);
++}
++
++static inline __u32
++hash_id_cidr(struct ip_set_nethash *map,
++	     ip_set_ip_t ip,
++	     unsigned char cidr,
++	     ip_set_ip_t *hash_ip)
++{
++	__u32 jhash, randhash, id;
++	u_int16_t i;
++
++	*hash_ip = pack(ip, cidr);
++	jhash = jhash_ip(map, *hash_ip);
++	randhash = randhash_ip(map, *hash_ip);
++	
++	for (i = 0; i < map->probes; i++) {
++		id = (jhash + i * randhash) % map->hashsize;
++	   	DP("hash key: %u", id);
++	   	if (map->members[id] == *hash_ip)
++			return id;
++	}
++	return UINT_MAX;
++}
++
++static inline __u32
++hash_id(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
++{
++	struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
++	__u32 id = UINT_MAX;
++	int i;
++
++	for (i = 0; i < 30 && map->cidr[i]; i++) {
++		id = hash_id_cidr(map, ip, map->cidr[i], hash_ip);
++		if (id != UINT_MAX)
++			break;
++	}
++	return id;
++}
++
++static inline int
++__testip_cidr(struct ip_set *set, ip_set_ip_t ip, unsigned char cidr,
++	      ip_set_ip_t *hash_ip)
++{
++	struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
++
++	return (hash_id_cidr(map, ip, cidr, hash_ip) != UINT_MAX);
++}
++
++static inline int
++__testip(struct ip_set *set, ip_set_ip_t ip, ip_set_ip_t *hash_ip)
++{
++	return (hash_id(set, ip, hash_ip) != UINT_MAX);
++}
++
++static int
++testip(struct ip_set *set, const void *data, size_t size,
++       ip_set_ip_t *hash_ip)
++{
++	struct ip_set_req_nethash *req = 
++	    (struct ip_set_req_nethash *) data;
++
++	if (size != sizeof(struct ip_set_req_nethash)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_nethash),
++			      size);
++		return -EINVAL;
++	}
++	return (req->cidr == 32 ? __testip(set, req->ip, hash_ip)
++		: __testip_cidr(set, req->ip, req->cidr, hash_ip));
++}
++
++static int
++testip_kernel(struct ip_set *set, const struct sk_buff *skb,
++		u_int32_t flags, ip_set_ip_t *hash_ip)
++{
++	return __testip(set,
++			ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr 
++						: skb->nh.iph->daddr),
++			hash_ip);
++}
++
++static inline int
++__addip_base(struct ip_set_nethash *map, ip_set_ip_t ip)
++{
++	__u32 jhash, randhash, probe;
++	u_int16_t i;
++
++	jhash = jhash_ip(map, ip);
++	randhash = randhash_ip(map, ip);
++	
++	for (i = 0; i < map->probes; i++) {
++		probe = (jhash + i * randhash) % map->hashsize;
++		if (map->members[probe] == ip)
++			return -EEXIST;
++		if (!map->members[probe]) {
++			map->members[probe] = ip;
++			return 0;
++		}
++	}
++	/* Trigger rehashing */
++	return -EAGAIN;
++}
++
++static inline int
++__addip(struct ip_set_nethash *map, ip_set_ip_t ip, unsigned char cidr,
++	ip_set_ip_t *hash_ip)
++{
++	*hash_ip = pack(ip, cidr);
++	DP("%u.%u.%u.%u/%u, %u.%u.%u.%u", HIPQUAD(ip), cidr, HIPQUAD(*hash_ip));
++	
++	return __addip_base(map, *hash_ip);
++}
++
++static void
++update_cidr_sizes(struct ip_set_nethash *map, unsigned char cidr)
++{
++	unsigned char next;
++	int i;
++	
++	for (i = 0; i < 30 && map->cidr[i]; i++) {
++		if (map->cidr[i] == cidr) {
++			return;
++		} else if (map->cidr[i] < cidr) {
++			next = map->cidr[i];
++			map->cidr[i] = cidr;
++			cidr = next;
++		}
++	}
++	if (i < 30)
++		map->cidr[i] = cidr;
++}
++
++static int
++addip(struct ip_set *set, const void *data, size_t size,
++        ip_set_ip_t *hash_ip)
++{
++	struct ip_set_req_nethash *req = 
++	    (struct ip_set_req_nethash *) data;
++	int ret;
++
++	if (size != sizeof(struct ip_set_req_nethash)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_nethash),
++			      size);
++		return -EINVAL;
++	}
++	ret = __addip((struct ip_set_nethash *) set->data, 
++		      req->ip, req->cidr, hash_ip);
++	
++	if (ret == 0)
++		update_cidr_sizes((struct ip_set_nethash *) set->data,
++				  req->cidr);
++	
++	return ret;
++}
++
++static int
++addip_kernel(struct ip_set *set, const struct sk_buff *skb,
++	     u_int32_t flags, ip_set_ip_t *hash_ip)
++{
++	struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
++	int ret = -ERANGE;
++	ip_set_ip_t ip = ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
++						 : skb->nh.iph->daddr);
++	
++	if (map->cidr[0])
++		ret = __addip(map, ip, map->cidr[0], hash_ip);
++		
++	return ret;
++}
++
++static int retry(struct ip_set *set)
++{
++	struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
++	ip_set_ip_t *members;
++	u_int32_t i, hashsize;
++	unsigned newbytes;
++	int res;
++	struct ip_set_nethash tmp = {
++		.hashsize = map->hashsize,
++		.probes = map->probes,
++		.resize = map->resize
++	};
++	
++	if (map->resize == 0)
++		return -ERANGE;
++
++	memcpy(tmp.cidr, map->cidr, 30 * sizeof(unsigned char));
++    again:
++    	res = 0;
++    	
++	/* Calculate new parameters */
++	get_random_bytes(&tmp.initval, 4);
++	hashsize = tmp.hashsize + (tmp.hashsize * map->resize)/100;
++	if (hashsize == tmp.hashsize)
++		hashsize++;
++	tmp.prime = make_prime(hashsize);
++	
++	ip_set_printk("rehashing of set %s triggered: "
++		      "hashsize grows from %u to %u",
++		      set->name, tmp.hashsize, hashsize);
++	tmp.hashsize = hashsize;
++	
++	newbytes = hashsize * sizeof(ip_set_ip_t);
++	tmp.members = ip_set_malloc(newbytes);
++	if (!tmp.members) {
++		DP("out of memory for %d bytes", newbytes);
++		return -ENOMEM;
++	}
++	memset(tmp.members, 0, newbytes);
++	
++	write_lock_bh(&set->lock);
++	map = (struct ip_set_nethash *) set->data; /* Play safe */
++	for (i = 0; i < map->hashsize && res == 0; i++) {
++		if (map->members[i])
++			res = __addip_base(&tmp, map->members[i]);
++	}
++	if (res) {
++		/* Failure, try again */
++		write_unlock_bh(&set->lock);
++		ip_set_free(tmp.members, newbytes);
++		goto again;
++	}
++	
++	/* Success at resizing! */
++	members = map->members;
++	hashsize = map->hashsize;
++	
++	map->initval = tmp.initval;
++	map->prime = tmp.prime;
++	map->hashsize = tmp.hashsize;
++	map->members = tmp.members;
++	write_unlock_bh(&set->lock);
++
++	ip_set_free(members, hashsize * sizeof(ip_set_ip_t));
++
++	return 0;
++}
++
++static inline int
++__delip(struct ip_set_nethash *map, ip_set_ip_t ip, unsigned char cidr,
++	ip_set_ip_t *hash_ip)
++{
++	ip_set_ip_t id = hash_id_cidr(map, ip, cidr, hash_ip);
++
++	if (id == UINT_MAX)
++		return -EEXIST;
++		
++	map->members[id] = 0;
++	return 0;
++}
++
++static int
++delip(struct ip_set *set, const void *data, size_t size,
++        ip_set_ip_t *hash_ip)
++{
++	struct ip_set_req_nethash *req =
++	    (struct ip_set_req_nethash *) data;
++
++	if (size != sizeof(struct ip_set_req_nethash)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_nethash),
++			      size);
++		return -EINVAL;
++	}
++	/* TODO: no garbage collection in map->cidr */		
++	return __delip((struct ip_set_nethash *) set->data, 
++		       req->ip, req->cidr, hash_ip);
++}
++
++static int
++delip_kernel(struct ip_set *set, const struct sk_buff *skb,
++	       u_int32_t flags, ip_set_ip_t *hash_ip)
++{
++	struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
++	int ret = -ERANGE;
++	ip_set_ip_t ip = ntohl(flags & IPSET_SRC ? skb->nh.iph->saddr
++						 : skb->nh.iph->daddr);
++	
++	if (map->cidr[0])
++		ret = __delip(map, ip, map->cidr[0], hash_ip);
++	
++	return ret;
++}
++
++static int create(struct ip_set *set, const void *data, size_t size)
++{
++	unsigned newbytes;
++	struct ip_set_req_nethash_create *req =
++	    (struct ip_set_req_nethash_create *) data;
++	struct ip_set_nethash *map;
++
++	if (size != sizeof(struct ip_set_req_nethash_create)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			       sizeof(struct ip_set_req_nethash_create),
++			       size);
++		return -EINVAL;
++	}
++
++	if (req->hashsize < 1) {
++		ip_set_printk("hashsize too small");
++		return -ENOEXEC;
++	}
++
++	map = kmalloc(sizeof(struct ip_set_nethash), GFP_KERNEL);
++	if (!map) {
++		DP("out of memory for %d bytes",
++		   sizeof(struct ip_set_nethash));
++		return -ENOMEM;
++	}
++	get_random_bytes(&map->initval, 4);
++	map->prime = make_prime(req->hashsize);
++	map->hashsize = req->hashsize;
++	map->probes = req->probes;
++	map->resize = req->resize;
++	memset(map->cidr, 0, 30 * sizeof(unsigned char));
++	newbytes = map->hashsize * sizeof(ip_set_ip_t);
++	map->members = ip_set_malloc(newbytes);
++	if (!map->members) {
++		DP("out of memory for %d bytes", newbytes);
++		kfree(map);
++		return -ENOMEM;
++	}
++	memset(map->members, 0, newbytes);
++
++	set->data = map;
++	return 0;
++}
++
++static void destroy(struct ip_set *set)
++{
++	struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
++
++	ip_set_free(map->members, map->hashsize * sizeof(ip_set_ip_t));
++	kfree(map);
++
++	set->data = NULL;
++}
++
++static void flush(struct ip_set *set)
++{
++	struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
++	memset(map->members, 0, map->hashsize * sizeof(ip_set_ip_t));
++	memset(map->cidr, 0, 30 * sizeof(unsigned char));
++}
++
++static void list_header(const struct ip_set *set, void *data)
++{
++	struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
++	struct ip_set_req_nethash_create *header =
++	    (struct ip_set_req_nethash_create *) data;
++
++	header->hashsize = map->hashsize;
++	header->probes = map->probes;
++	header->resize = map->resize;
++}
++
++static int list_members_size(const struct ip_set *set)
++{
++	struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
++
++	return (map->hashsize * sizeof(ip_set_ip_t));
++}
++
++static void list_members(const struct ip_set *set, void *data)
++{
++	struct ip_set_nethash *map = (struct ip_set_nethash *) set->data;
++	int bytes = map->hashsize * sizeof(ip_set_ip_t);
++
++	memcpy(data, map->members, bytes);
++}
++
++static struct ip_set_type ip_set_nethash = {
++	.typename		= SETTYPE_NAME,
++	.typecode		= IPSET_TYPE_IP,
++	.protocol_version	= IP_SET_PROTOCOL_VERSION,
++	.create			= &create,
++	.destroy		= &destroy,
++	.flush			= &flush,
++	.reqsize		= sizeof(struct ip_set_req_nethash),
++	.addip			= &addip,
++	.addip_kernel		= &addip_kernel,
++	.retry			= &retry,
++	.delip			= &delip,
++	.delip_kernel		= &delip_kernel,
++	.testip			= &testip,
++	.testip_kernel		= &testip_kernel,
++	.header_size		= sizeof(struct ip_set_req_nethash_create),
++	.list_header		= &list_header,
++	.list_members_size	= &list_members_size,
++	.list_members		= &list_members,
++	.me			= THIS_MODULE,
++};
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
++MODULE_DESCRIPTION("nethash type of IP sets");
++
++static int __init init(void)
++{
++	return ip_set_register_set_type(&ip_set_nethash);
++}
++
++static void __exit fini(void)
++{
++	/* FIXME: possible race with ip_set_create() */
++	ip_set_unregister_set_type(&ip_set_nethash);
++}
++
++module_init(init);
++module_exit(fini);
+diff -Naur linux-old/net/ipv4/netfilter/ip_set_portmap.c linux-new/net/ipv4/netfilter/ip_set_portmap.c
+--- linux-old/net/ipv4/netfilter/ip_set_portmap.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/net/ipv4/netfilter/ip_set_portmap.c	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,321 @@
++/* Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.  
++ */
++
++/* Kernel module implementing a port set type as a bitmap */
++
++#include <linux/module.h>
++#include <linux/ip.h>
++#include <linux/tcp.h>
++#include <linux/udp.h>
++#include <linux/skbuff.h>
++#include <linux/netfilter_ipv4/ip_tables.h>
++#include <linux/netfilter_ipv4/ip_set.h>
++#include <linux/errno.h>
++#include <asm/uaccess.h>
++#include <asm/bitops.h>
++#include <asm/softirq.h>
++#include <linux/spinlock.h>
++
++#include <net/ip.h>
++
++#include <linux/netfilter_ipv4/ip_set_portmap.h>
++
++static inline ip_set_ip_t
++get_port(const struct sk_buff *skb, u_int32_t flags)
++{
++	struct iphdr *iph = skb->nh.iph;
++	u_int16_t offset = ntohs(iph->frag_off) & IP_OFFSET;
++
++	switch (iph->protocol) {
++	case IPPROTO_TCP: {
++		struct tcphdr *tcph = (struct tcphdr *)((u_int32_t *)iph + iph->ihl);
++		
++		/* See comments at tcp_match in ip_tables.c */
++		if (offset != 0
++		    || (offset == 0
++		        && (skb->len - iph->ihl * 4) < sizeof(struct tcphdr)))
++			return INVALID_PORT;
++
++	     	return ntohs(flags & IPSET_SRC ?
++			     tcph->source : tcph->dest);
++	    }
++	case IPPROTO_UDP: {
++		struct udphdr *udph = (struct udphdr *)((u_int32_t *)iph + iph->ihl);
++
++		if (offset != 0
++		    || (offset == 0
++		        && (skb->len - iph->ihl * 4) < sizeof(struct udphdr)))
++			return INVALID_PORT;
++
++	     	return ntohs(flags & IPSET_SRC ?
++			     udph->source : udph->dest);
++	    }
++	default:
++		return INVALID_PORT;
++	}
++}
++
++static inline int
++__testport(struct ip_set *set, ip_set_ip_t port, ip_set_ip_t *hash_port)
++{
++	struct ip_set_portmap *map = (struct ip_set_portmap *) set->data;
++
++	if (port < map->first_port || port > map->last_port)
++		return -ERANGE;
++		
++	*hash_port = port;
++	DP("set: %s, port:%u, %u", set->name, port, *hash_port);
++	return !!test_bit(port - map->first_port, map->members);
++}
++
++static int
++testport(struct ip_set *set, const void *data, size_t size,
++         ip_set_ip_t *hash_port)
++{
++	struct ip_set_req_portmap *req = 
++	    (struct ip_set_req_portmap *) data;
++
++	if (size != sizeof(struct ip_set_req_portmap)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_portmap),
++			      size);
++		return -EINVAL;
++	}
++	return __testport(set, req->port, hash_port);
++}
++
++static int
++testport_kernel(struct ip_set *set, const struct sk_buff *skb,
++		u_int32_t flags, ip_set_ip_t *hash_port)
++{
++	int res;
++	ip_set_ip_t port = get_port(skb, flags);
++
++	DP("flag %s port %u", flags & IPSET_SRC ? "SRC" : "DST", port);	
++	if (port == INVALID_PORT)
++		return 0;	
++
++	res =  __testport(set, port, hash_port);
++	
++	return (res < 0 ? 0 : res);
++}
++
++static inline int
++__addport(struct ip_set *set, ip_set_ip_t port, ip_set_ip_t *hash_port)
++{
++	struct ip_set_portmap *map = (struct ip_set_portmap *) set->data;
++
++	if (port < map->first_port || port > map->last_port)
++		return -ERANGE;
++	if (test_and_set_bit(port - map->first_port, map->members))
++		return -EEXIST;
++		
++	*hash_port = port;
++	DP("port %u", port);
++	return 0;
++}
++
++static int
++addport(struct ip_set *set, const void *data, size_t size,
++        ip_set_ip_t *hash_port)
++{
++	struct ip_set_req_portmap *req = 
++	    (struct ip_set_req_portmap *) data;
++
++	if (size != sizeof(struct ip_set_req_portmap)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_portmap),
++			      size);
++		return -EINVAL;
++	}
++	return __addport(set, req->port, hash_port);
++}
++
++static int
++addport_kernel(struct ip_set *set, const struct sk_buff *skb,
++	       u_int32_t flags, ip_set_ip_t *hash_port)
++{
++	ip_set_ip_t port = get_port(skb, flags);
++	
++	if (port == INVALID_PORT)
++		return -EINVAL;
++
++	return __addport(set, port, hash_port);
++}
++
++static inline int
++__delport(struct ip_set *set, ip_set_ip_t port, ip_set_ip_t *hash_port)
++{
++	struct ip_set_portmap *map = (struct ip_set_portmap *) set->data;
++
++	if (port < map->first_port || port > map->last_port)
++		return -ERANGE;
++	if (!test_and_clear_bit(port - map->first_port, map->members))
++		return -EEXIST;
++		
++	*hash_port = port;
++	DP("port %u", port);
++	return 0;
++}
++
++static int
++delport(struct ip_set *set, const void *data, size_t size,
++        ip_set_ip_t *hash_port)
++{
++	struct ip_set_req_portmap *req =
++	    (struct ip_set_req_portmap *) data;
++
++	if (size != sizeof(struct ip_set_req_portmap)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			      sizeof(struct ip_set_req_portmap),
++			      size);
++		return -EINVAL;
++	}
++	return __delport(set, req->port, hash_port);
++}
++
++static int
++delport_kernel(struct ip_set *set, const struct sk_buff *skb,
++	       u_int32_t flags, ip_set_ip_t *hash_port)
++{
++	ip_set_ip_t port = get_port(skb, flags);
++	
++	if (port == INVALID_PORT)
++		return -EINVAL;
++
++	return __delport(set, port, hash_port);
++}
++
++static int create(struct ip_set *set, const void *data, size_t size)
++{
++	int newbytes;
++	struct ip_set_req_portmap_create *req =
++	    (struct ip_set_req_portmap_create *) data;
++	struct ip_set_portmap *map;
++
++	if (size != sizeof(struct ip_set_req_portmap_create)) {
++		ip_set_printk("data length wrong (want %zu, have %zu)",
++			       sizeof(struct ip_set_req_portmap_create),
++			       size);
++		return -EINVAL;
++	}
++
++	DP("from %u to %u", req->from, req->to);
++
++	if (req->from > req->to) {
++		DP("bad port range");
++		return -ENOEXEC;
++	}
++
++	if (req->to - req->from > MAX_RANGE) {
++		ip_set_printk("range too big (max %d ports)",
++			       MAX_RANGE);
++		return -ENOEXEC;
++	}
++
++	map = kmalloc(sizeof(struct ip_set_portmap), GFP_KERNEL);
++	if (!map) {
++		DP("out of memory for %d bytes",
++		   sizeof(struct ip_set_portmap));
++		return -ENOMEM;
++	}
++	map->first_port = req->from;
++	map->last_port = req->to;
++	newbytes = bitmap_bytes(req->from, req->to);
++	map->members = kmalloc(newbytes, GFP_KERNEL);
++	if (!map->members) {
++		DP("out of memory for %d bytes", newbytes);
++		kfree(map);
++		return -ENOMEM;
++	}
++	memset(map->members, 0, newbytes);
++
++	set->data = map;
++	return 0;
++}
++
++static void destroy(struct ip_set *set)
++{
++	struct ip_set_portmap *map = (struct ip_set_portmap *) set->data;
++
++	kfree(map->members);
++	kfree(map);
++
++	set->data = NULL;
++}
++
++static void flush(struct ip_set *set)
++{
++	struct ip_set_portmap *map = (struct ip_set_portmap *) set->data;
++	memset(map->members, 0, bitmap_bytes(map->first_port, map->last_port));
++}
++
++static void list_header(const struct ip_set *set, void *data)
++{
++	struct ip_set_portmap *map = (struct ip_set_portmap *) set->data;
++	struct ip_set_req_portmap_create *header =
++	    (struct ip_set_req_portmap_create *) data;
++
++	DP("list_header %u %u", map->first_port, map->last_port);
++
++	header->from = map->first_port;
++	header->to = map->last_port;
++}
++
++static int list_members_size(const struct ip_set *set)
++{
++	struct ip_set_portmap *map = (struct ip_set_portmap *) set->data;
++
++	return bitmap_bytes(map->first_port, map->last_port);
++}
++
++static void list_members(const struct ip_set *set, void *data)
++{
++	struct ip_set_portmap *map = (struct ip_set_portmap *) set->data;
++	int bytes = bitmap_bytes(map->first_port, map->last_port);
++
++	memcpy(data, map->members, bytes);
++}
++
++static struct ip_set_type ip_set_portmap = {
++	.typename		= SETTYPE_NAME,
++	.typecode		= IPSET_TYPE_PORT,
++	.protocol_version	= IP_SET_PROTOCOL_VERSION,
++	.create			= &create,
++	.destroy		= &destroy,
++	.flush			= &flush,
++	.reqsize		= sizeof(struct ip_set_req_portmap),
++	.addip			= &addport,
++	.addip_kernel		= &addport_kernel,
++	.delip			= &delport,
++	.delip_kernel		= &delport_kernel,
++	.testip			= &testport,
++	.testip_kernel		= &testport_kernel,
++	.header_size		= sizeof(struct ip_set_req_portmap_create),
++	.list_header		= &list_header,
++	.list_members_size	= &list_members_size,
++	.list_members		= &list_members,
++	.me			= THIS_MODULE,
++};
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
++MODULE_DESCRIPTION("portmap type of IP sets");
++
++static int __init init(void)
++{
++	return ip_set_register_set_type(&ip_set_portmap);
++}
++
++static void __exit fini(void)
++{
++	/* FIXME: possible race with ip_set_create() */
++	ip_set_unregister_set_type(&ip_set_portmap);
++}
++
++module_init(init);
++module_exit(fini);
+diff -Naur linux-old/net/ipv4/netfilter/ipt_set.c linux-new/net/ipv4/netfilter/ipt_set.c
+--- linux-old/net/ipv4/netfilter/ipt_set.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/net/ipv4/netfilter/ipt_set.c	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,114 @@
++/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
++ *                         Patrick Schaaf <bof@bof.de>
++ *                         Martin Josefsson <gandalf@wlug.westbo.se>
++ * Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.  
++ */
++
++/* Kernel module to match an IP set. */
++
++#include <linux/module.h>
++#include <linux/ip.h>
++#include <linux/skbuff.h>
++
++#include <linux/netfilter_ipv4/ip_tables.h>
++#include <linux/netfilter_ipv4/ip_set.h>
++#include <linux/netfilter_ipv4/ipt_set.h>
++
++static inline int
++match_set(const struct ipt_set_info *info,
++	  const struct sk_buff *skb,
++	  int inv)
++{	
++	if (ip_set_testip_kernel(info->index, skb, info->flags))
++		inv = !inv;
++	return inv;
++}
++
++static int
++match(const struct sk_buff *skb,
++      const struct net_device *in,
++      const struct net_device *out,
++      const void *matchinfo,
++      int offset,
++      const void *hdr,
++      u_int16_t datalen,
++      int *hotdrop)
++{
++	const struct ipt_set_info_match *info = matchinfo;
++		
++	return match_set(&info->match_set,
++			 skb,
++			 info->match_set.flags[0] & IPSET_MATCH_INV);
++}
++
++static int
++checkentry(const char *tablename,
++	   const struct ipt_ip *ip,
++	   void *matchinfo,
++	   unsigned int matchsize,
++	   unsigned int hook_mask)
++{
++	struct ipt_set_info_match *info = 
++		(struct ipt_set_info_match *) matchinfo;
++	ip_set_id_t index;
++
++	if (matchsize != IPT_ALIGN(sizeof(struct ipt_set_info_match))) {
++		ip_set_printk("invalid matchsize %d", matchsize);
++		return 0;
++	}
++
++	index = ip_set_get_byindex(info->match_set.index);
++		
++	if (index == IP_SET_INVALID_ID) {
++		ip_set_printk("Cannot find set indentified by id %u to match",
++			      info->match_set.index);
++		return 0;	/* error */
++	}
++	if (info->match_set.flags[IP_SET_MAX_BINDINGS] != 0) {
++		ip_set_printk("That's nasty!");
++		return 0;	/* error */
++	}
++
++	return 1;
++}
++
++static void destroy(void *matchinfo, unsigned int matchsize)
++{
++	struct ipt_set_info_match *info = matchinfo;
++
++	if (matchsize != IPT_ALIGN(sizeof(struct ipt_set_info_match))) {
++		ip_set_printk("invalid matchsize %d", matchsize);
++		return;
++	}
++
++	ip_set_put(info->match_set.index);
++}
++
++static struct ipt_match set_match = {
++	.name		= "set",
++	.match		= &match,
++	.checkentry	= &checkentry,
++	.destroy	= &destroy,
++	.me		= THIS_MODULE
++};
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
++MODULE_DESCRIPTION("iptables IP set match module");
++
++static int __init init(void)
++{
++	return ipt_register_match(&set_match);
++}
++
++static void __exit fini(void)
++{
++	ipt_unregister_match(&set_match);
++}
++
++module_init(init);
++module_exit(fini);
+diff -Naur linux-old/net/ipv4/netfilter/ipt_SET.c linux-new/net/ipv4/netfilter/ipt_SET.c
+--- linux-old/net/ipv4/netfilter/ipt_SET.c	1970-01-01 01:00:00.000000000 +0100
++++ linux-new/net/ipv4/netfilter/ipt_SET.c	2005-08-10 22:13:00.000000000 +0200
+@@ -0,0 +1,127 @@
++/* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
++ *                         Patrick Schaaf <bof@bof.de>
++ *                         Martin Josefsson <gandalf@wlug.westbo.se>
++ * Copyright (C) 2003-2004 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.  
++ */
++
++/* ipt_SET.c - netfilter target to manipulate IP sets */
++
++#include <linux/types.h>
++#include <linux/ip.h>
++#include <linux/timer.h>
++#include <linux/module.h>
++#include <linux/netfilter.h>
++#include <linux/netdevice.h>
++#include <linux/if.h>
++#include <linux/inetdevice.h>
++#include <net/protocol.h>
++#include <net/checksum.h>
++#include <linux/netfilter_ipv4.h>
++#include <linux/netfilter_ipv4/ip_nat_rule.h>
++#include <linux/netfilter_ipv4/ipt_set.h>
++
++static unsigned int
++target(struct sk_buff **pskb,
++       unsigned int hooknum,
++       const struct net_device *in,
++       const struct net_device *out,
++       const void *targinfo,
++       void *userinfo)
++{
++	const struct ipt_set_info_target *info = targinfo;
++	
++	if (info->add_set.index != IP_SET_INVALID_ID)
++		ip_set_addip_kernel(info->add_set.index,
++				    *pskb,
++				    info->add_set.flags);
++	if (info->del_set.index != IP_SET_INVALID_ID)
++		ip_set_delip_kernel(info->del_set.index,
++				    *pskb,
++				    info->del_set.flags);
++
++	return IPT_CONTINUE;
++}
++
++static int
++checkentry(const char *tablename,
++	   const struct ipt_entry *e,
++	   void *targinfo,
++	   unsigned int targinfosize, unsigned int hook_mask)
++{
++	struct ipt_set_info_target *info = 
++		(struct ipt_set_info_target *) targinfo;
++	ip_set_id_t index;
++
++	if (targinfosize != IPT_ALIGN(sizeof(*info))) {
++		DP("bad target info size %u", targinfosize);
++		return 0;
++	}
++
++	if (info->add_set.index != IP_SET_INVALID_ID) {
++		index = ip_set_get_byindex(info->add_set.index);
++		if (index == IP_SET_INVALID_ID) {
++			ip_set_printk("cannot find add_set index %u as target",
++				      info->add_set.index);
++			return 0;	/* error */
++		}
++	}
++
++	if (info->del_set.index != IP_SET_INVALID_ID) {
++		index = ip_set_get_byindex(info->del_set.index);
++		if (index == IP_SET_INVALID_ID) {
++			ip_set_printk("cannot find del_set index %u as target",
++				      info->del_set.index);
++			return 0;	/* error */
++		}
++	}
++	if (info->add_set.flags[IP_SET_MAX_BINDINGS] != 0
++	    || info->del_set.flags[IP_SET_MAX_BINDINGS] != 0) {
++		ip_set_printk("That's nasty!");
++		return 0;	/* error */
++	}
++	return 1;
++}
++
++static void destroy(void *targetinfo, unsigned int targetsize)
++{
++	struct ipt_set_info_target *info = targetinfo;
++
++	if (targetsize != IPT_ALIGN(sizeof(struct ipt_set_info_target))) {
++		ip_set_printk("invalid targetsize %d", targetsize);
++		return;
++	}
++
++	if (info->add_set.index != IP_SET_INVALID_ID)
++		ip_set_put(info->add_set.index);
++	if (info->del_set.index != IP_SET_INVALID_ID)
++		ip_set_put(info->del_set.index);
++}
++
++static struct ipt_target SET_target = {
++	.name 		= "SET",
++	.target 	= target,
++	.checkentry 	= checkentry,
++	.destroy 	= destroy,
++	.me 		= THIS_MODULE
++};
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
++MODULE_DESCRIPTION("iptables IP set target module");
++
++static int __init init(void)
++{
++	return ipt_register_target(&SET_target);
++}
++
++static void __exit fini(void)
++{
++	ipt_unregister_target(&SET_target);
++}
++
++module_init(init);
++module_exit(fini);
+diff -Naur linux-old/net/ipv4/netfilter/Makefile linux-new/net/ipv4/netfilter/Makefile
+--- linux-old/net/ipv4/netfilter/Makefile	2005-07-23 23:34:46.000000000 +0200
++++ linux-new/net/ipv4/netfilter/Makefile	2005-08-10 22:13:01.000000000 +0200
+@@ -75,6 +75,18 @@
+ obj-$(CONFIG_IP_NF_MATCH_HELPER) += ipt_helper.o
+ obj-$(CONFIG_IP_NF_MATCH_LIMIT) += ipt_limit.o
+ obj-$(CONFIG_IP_NF_MATCH_MARK) += ipt_mark.o
++obj-$(CONFIG_IP_NF_MATCH_SET) += ipt_set.o
++obj-$(CONFIG_IP_NF_TARGET_SET) += ipt_SET.o
++ifdef CONFIG_IP_NF_SET
++	obj-$(CONFIG_IP_NF_SET) += ip_set.o
++	export-objs += ip_set.o
++endif
++obj-$(CONFIG_IP_NF_SET_IPMAP) += ip_set_ipmap.o
++obj-$(CONFIG_IP_NF_SET_PORTMAP) += ip_set_portmap.o
++obj-$(CONFIG_IP_NF_SET_MACIPMAP) += ip_set_macipmap.o
++obj-$(CONFIG_IP_NF_SET_IPHASH) += ip_set_iphash.o
++obj-$(CONFIG_IP_NF_SET_NETHASH) += ip_set_nethash.o
++obj-$(CONFIG_IP_NF_SET_IPTREE) += ip_set_iptree.o
+ obj-$(CONFIG_IP_NF_MATCH_MAC) += ipt_mac.o
+ obj-$(CONFIG_IP_NF_MATCH_IPP2P) += ipt_ipp2p.o
+