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Diffstat (limited to 'target/linux/generic-2.6/patches-2.6.22/120-openswan-2.4.0.kernel-2.6-natt.patch')
-rw-r--r--target/linux/generic-2.6/patches-2.6.22/120-openswan-2.4.0.kernel-2.6-natt.patch169
1 files changed, 169 insertions, 0 deletions
diff --git a/target/linux/generic-2.6/patches-2.6.22/120-openswan-2.4.0.kernel-2.6-natt.patch b/target/linux/generic-2.6/patches-2.6.22/120-openswan-2.4.0.kernel-2.6-natt.patch
new file mode 100644
index 0000000000..4d9dc9500e
--- /dev/null
+++ b/target/linux/generic-2.6/patches-2.6.22/120-openswan-2.4.0.kernel-2.6-natt.patch
@@ -0,0 +1,169 @@
+diff -urN linux-2.6.21.1.old/include/net/xfrmudp.h linux-2.6.21.1.dev/include/net/xfrmudp.h
+--- linux-2.6.21.1.old/include/net/xfrmudp.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.dev/include/net/xfrmudp.h 2007-05-26 20:24:53.933599448 +0200
+@@ -0,0 +1,10 @@
++/*
++ * pointer to function for type that xfrm4_input wants, to permit
++ * decoupling of XFRM from udp.c
++ */
++#define HAVE_XFRM4_UDP_REGISTER
++
++typedef int (*xfrm4_rcv_encap_t)(struct sk_buff *skb, __u16 encap_type);
++extern int udp4_register_esp_rcvencap(xfrm4_rcv_encap_t func
++ , xfrm4_rcv_encap_t *oldfunc);
++extern int udp4_unregister_esp_rcvencap(xfrm4_rcv_encap_t func);
+diff -urN linux-2.6.21.1.old/net/ipv4/Kconfig linux-2.6.21.1.dev/net/ipv4/Kconfig
+--- linux-2.6.21.1.old/net/ipv4/Kconfig 2007-04-27 23:49:26.000000000 +0200
++++ linux-2.6.21.1.dev/net/ipv4/Kconfig 2007-05-26 20:24:53.965594584 +0200
+@@ -266,6 +266,12 @@
+ Network), but can be distributed all over the Internet. If you want
+ to do that, say Y here and to "IP multicast routing" below.
+
++config IPSEC_NAT_TRAVERSAL
++ bool "IPSEC NAT-Traversal (KLIPS compatible)"
++ depends on INET
++ ---help---
++ Includes support for RFC3947/RFC3948 NAT-Traversal of ESP over UDP.
++
+ config IP_MROUTE
+ bool "IP: multicast routing"
+ depends on IP_MULTICAST
+diff -urN linux-2.6.21.1.old/net/ipv4/udp.c linux-2.6.21.1.dev/net/ipv4/udp.c
+--- linux-2.6.21.1.old/net/ipv4/udp.c 2007-04-27 23:49:26.000000000 +0200
++++ linux-2.6.21.1.dev/net/ipv4/udp.c 2007-05-26 20:24:53.966594432 +0200
+@@ -101,12 +101,15 @@
+ #include <net/route.h>
+ #include <net/checksum.h>
+ #include <net/xfrm.h>
++#include <net/xfrmudp.h>
+ #include "udp_impl.h"
+
+ /*
+ * Snmp MIB for the UDP layer
+ */
+
++static xfrm4_rcv_encap_t xfrm4_rcv_encap_func;
++
+ DEFINE_SNMP_STAT(struct udp_mib, udp_statistics) __read_mostly;
+
+ struct hlist_head udp_hash[UDP_HTABLE_SIZE];
+@@ -1008,6 +1011,42 @@
+ return 0;
+ }
+
++#if defined(CONFIG_XFRM) || defined(CONFIG_IPSEC_NAT_TRAVERSAL)
++
++/* if XFRM isn't a module, then register it directly. */
++#if 0 && !defined(CONFIG_XFRM_MODULE) && !defined(CONFIG_IPSEC_NAT_TRAVERSAL)
++static xfrm4_rcv_encap_t xfrm4_rcv_encap_func = xfrm4_rcv_encap;
++#else
++static xfrm4_rcv_encap_t xfrm4_rcv_encap_func = NULL;
++#endif
++
++int udp4_register_esp_rcvencap(xfrm4_rcv_encap_t func
++ , xfrm4_rcv_encap_t *oldfunc)
++{
++ if(oldfunc != NULL) {
++ *oldfunc = xfrm4_rcv_encap_func;
++ }
++
++#if 0
++ if(xfrm4_rcv_encap_func != NULL)
++ return -1;
++#endif
++
++ xfrm4_rcv_encap_func = func;
++ return 0;
++}
++
++int udp4_unregister_esp_rcvencap(xfrm4_rcv_encap_t func)
++{
++ if(xfrm4_rcv_encap_func != func)
++ return -1;
++
++ xfrm4_rcv_encap_func = NULL;
++ return 0;
++}
++#endif /* CONFIG_XFRM_MODULE || CONFIG_IPSEC_NAT_TRAVERSAL */
++
++
+ /* return:
+ * 1 if the UDP system should process it
+ * 0 if we should drop this packet
+@@ -1015,7 +1054,7 @@
+ */
+ static int udp_encap_rcv(struct sock * sk, struct sk_buff *skb)
+ {
+-#ifndef CONFIG_XFRM
++#if !defined(CONFIG_XFRM) && !defined(CONFIG_IPSEC_NAT_TRAVERSAL)
+ return 1;
+ #else
+ struct udp_sock *up = udp_sk(sk);
+@@ -1030,11 +1069,11 @@
+ /* if we're overly short, let UDP handle it */
+ len = skb->len - sizeof(struct udphdr);
+ if (len <= 0)
+- return 1;
++ return 2;
+
+ /* if this is not encapsulated socket, then just return now */
+ if (!encap_type)
+- return 1;
++ return 3;
+
+ /* If this is a paged skb, make sure we pull up
+ * whatever data we need to look at. */
+@@ -1057,7 +1096,7 @@
+ len = sizeof(struct udphdr);
+ } else
+ /* Must be an IKE packet.. pass it through */
+- return 1;
++ return 4;
+ break;
+ case UDP_ENCAP_ESPINUDP_NON_IKE:
+ /* Check if this is a keepalive packet. If so, eat it. */
+@@ -1070,7 +1109,7 @@
+ len = sizeof(struct udphdr) + 2 * sizeof(u32);
+ } else
+ /* Must be an IKE packet.. pass it through */
+- return 1;
++ return 5;
+ break;
+ }
+
+@@ -1081,6 +1120,8 @@
+ */
+ if (skb_cloned(skb) && pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
+ return 0;
++ if (skb_cloned(skb) && pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
++ return 0;
+
+ /* Now we can update and verify the packet length... */
+ iph = ip_hdr(skb);
+@@ -1145,9 +1186,13 @@
+ return 0;
+ }
+ if (ret < 0) {
+- /* process the ESP packet */
+- ret = xfrm4_rcv_encap(skb, up->encap_type);
+- UDP_INC_STATS_BH(UDP_MIB_INDATAGRAMS, up->pcflag);
++ if(xfrm4_rcv_encap_func != NULL) {
++ ret = (*xfrm4_rcv_encap_func)(skb, up->encap_type);
++ UDP_INC_STATS_BH(UDP_MIB_INDATAGRAMS, up->pcflag);
++ } else {
++ UDP_INC_STATS_BH(UDP_MIB_INERRORS, up->pcflag);
++ ret = 1;
++ }
+ return -ret;
+ }
+ /* FALLTHROUGH -- it's a UDP Packet */
+@@ -1847,3 +1892,9 @@
+ EXPORT_SYMBOL(udp_proc_register);
+ EXPORT_SYMBOL(udp_proc_unregister);
+ #endif
++
++#if defined(CONFIG_IPSEC_NAT_TRAVERSAL)
++EXPORT_SYMBOL(udp4_register_esp_rcvencap);
++EXPORT_SYMBOL(udp4_unregister_esp_rcvencap);
++#endif
++