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-rw-r--r--target/linux/generic-2.4/patches/621-netfilter_random.patch318
1 files changed, 318 insertions, 0 deletions
diff --git a/target/linux/generic-2.4/patches/621-netfilter_random.patch b/target/linux/generic-2.4/patches/621-netfilter_random.patch
new file mode 100644
index 0000000000..1ee85be46f
--- /dev/null
+++ b/target/linux/generic-2.4/patches/621-netfilter_random.patch
@@ -0,0 +1,318 @@
+diff -Naurp linux-2.4.34/Documentation/Configure.help linux-2.4.34.patched/Documentation/Configure.help
+--- linux-2.4.34/Documentation/Configure.help 2007-07-08 05:01:42.000000000 +0200
++++ linux-2.4.34.patched/Documentation/Configure.help 2007-07-08 05:02:26.000000000 +0200
+@@ -2914,6 +2914,15 @@ CONFIG_IP_NF_MATCH_MAC
+ If you want to compile it as a module, say M here and read
+ <file:Documentation/modules.txt>. If unsure, say `N'.
+
++Random match support
++CONFIG_IP_NF_MATCH_RANDOM
++ This option adds a `random' match,
++ which allow you to match packets randomly
++ following a given probability.
++
++ If you want to compile it as a module, say M here and read
++ Documentation/modules.txt. If unsure, say `N'.
++
+ Netfilter MARK match support
+ CONFIG_IP_NF_MATCH_MARK
+ Netfilter mark matching allows you to match packets based on the
+@@ -3221,6 +3230,7 @@ CONFIG_IP_NF_MATCH_HELPER
+ If you want to compile it as a module, say M here and read
+ Documentation/modules.txt. If unsure, say `Y'.
+
++
+ TCPMSS match support
+ CONFIG_IP_NF_MATCH_TCPMSS
+ This option adds a `tcpmss' match, which allows you to examine the
+@@ -3299,6 +3309,14 @@ CONFIG_IP6_NF_MATCH_MAC
+ If you want to compile it as a module, say M here and read
+ <file:Documentation/modules.txt>. If unsure, say `N'.
+
++CONFIG_IP6_NF_MATCH_RANDOM
++ This option adds a `random' match,
++ which allow you to match packets randomly
++ following a given probability.
++
++ If you want to compile it as a module, say M here and read
++ Documentation/modules.txt. If unsure, say `N'.
++
+ length match support
+ CONFIG_IP6_NF_MATCH_LENGTH
+ This option allows you to match the length of a packet against a
+diff -Naurp linux-2.4.34/include/linux/netfilter_ipv4/ipt_random.h linux-2.4.34.patched/include/linux/netfilter_ipv4/ipt_random.h
+--- linux-2.4.34/include/linux/netfilter_ipv4/ipt_random.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.34.patched/include/linux/netfilter_ipv4/ipt_random.h 2007-07-08 05:02:26.000000000 +0200
+@@ -0,0 +1,11 @@
++#ifndef _IPT_RAND_H
++#define _IPT_RAND_H
++
++#include <linux/param.h>
++#include <linux/types.h>
++
++struct ipt_rand_info {
++ u_int8_t average;
++};
++
++#endif /*_IPT_RAND_H*/
+diff -Naurp linux-2.4.34/include/linux/netfilter_ipv6/ip6t_random.h linux-2.4.34.patched/include/linux/netfilter_ipv6/ip6t_random.h
+--- linux-2.4.34/include/linux/netfilter_ipv6/ip6t_random.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.34.patched/include/linux/netfilter_ipv6/ip6t_random.h 2007-07-08 05:02:26.000000000 +0200
+@@ -0,0 +1,11 @@
++#ifndef _IP6T_RAND_H
++#define _IP6T_RAND_H
++
++#include <linux/param.h>
++#include <linux/types.h>
++
++struct ip6t_rand_info {
++ u_int8_t average;
++};
++
++#endif /*_IP6T_RAND_H*/
+diff -Naurp linux-2.4.34/net/ipv4/netfilter/Config.in linux-2.4.34.patched/net/ipv4/netfilter/Config.in
+--- linux-2.4.34/net/ipv4/netfilter/Config.in 2007-07-08 05:01:42.000000000 +0200
++++ linux-2.4.34.patched/net/ipv4/netfilter/Config.in 2007-07-08 05:03:32.000000000 +0200
+@@ -32,6 +32,7 @@ if [ "$CONFIG_IP_NF_IPTABLES" != "n" ];
+ dep_tristate ' netfilter MARK match support' CONFIG_IP_NF_MATCH_MARK $CONFIG_IP_NF_IPTABLES
+ dep_tristate ' Multiple port match support' CONFIG_IP_NF_MATCH_MULTIPORT $CONFIG_IP_NF_IPTABLES
+ dep_tristate ' TOS match support' CONFIG_IP_NF_MATCH_TOS $CONFIG_IP_NF_IPTABLES
++ dep_tristate ' random match support' CONFIG_IP_NF_MATCH_RANDOM $CONFIG_IP_NF_IPTABLES
+ dep_tristate ' TIME match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_TIME $CONFIG_IP_NF_IPTABLES
+ dep_tristate ' condition match support' CONFIG_IP_NF_MATCH_CONDITION $CONFIG_IP_NF_IPTABLES
+ dep_tristate ' recent match support' CONFIG_IP_NF_MATCH_RECENT $CONFIG_IP_NF_IPTABLES
+diff -Naurp linux-2.4.34/net/ipv4/netfilter/ipt_random.c linux-2.4.34.patched/net/ipv4/netfilter/ipt_random.c
+--- linux-2.4.34/net/ipv4/netfilter/ipt_random.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.34.patched/net/ipv4/netfilter/ipt_random.c 2007-07-08 05:02:26.000000000 +0200
+@@ -0,0 +1,96 @@
++/*
++ This is a module which is used for a "random" match support.
++ This file is distributed under the terms of the GNU General Public
++ License (GPL). Copies of the GPL can be obtained from:
++ ftp://prep.ai.mit.edu/pub/gnu/GPL
++
++ 2001-10-14 Fabrice MARIE <fabrice@netfilter.org> : initial implementation.
++*/
++
++#include <linux/module.h>
++#include <linux/skbuff.h>
++#include <linux/ip.h>
++#include <linux/random.h>
++#include <net/tcp.h>
++#include <linux/spinlock.h>
++#include <linux/netfilter_ipv4/ip_tables.h>
++#include <linux/netfilter_ipv4/ipt_random.h>
++
++MODULE_LICENSE("GPL");
++
++static int
++ipt_rand_match(const struct sk_buff *pskb,
++ const struct net_device *in,
++ const struct net_device *out,
++ const void *matchinfo,
++ int offset,
++ const void *hdr,
++ u_int16_t datalen,
++ int *hotdrop)
++{
++ /* Parameters from userspace */
++ const struct ipt_rand_info *info = matchinfo;
++ u_int8_t random_number;
++
++ /* get 1 random number from the kernel random number generation routine */
++ get_random_bytes((void *)(&random_number), 1);
++
++ /* Do we match ? */
++ if (random_number <= info->average)
++ return 1;
++ else
++ return 0;
++}
++
++static int
++ipt_rand_checkentry(const char *tablename,
++ const struct ipt_ip *e,
++ void *matchinfo,
++ unsigned int matchsize,
++ unsigned int hook_mask)
++{
++ /* Parameters from userspace */
++ const struct ipt_rand_info *info = matchinfo;
++
++ if (matchsize != IPT_ALIGN(sizeof(struct ipt_rand_info))) {
++ printk("ipt_random: matchsize %u != %u\n", matchsize,
++ IPT_ALIGN(sizeof(struct ipt_rand_info)));
++ return 0;
++ }
++
++ /* must be 1 <= average % <= 99 */
++ /* 1 x 2.55 = 2 */
++ /* 99 x 2.55 = 252 */
++ if ((info->average < 2) || (info->average > 252)) {
++ printk("ipt_random: invalid average %u\n", info->average);
++ return 0;
++ }
++
++ return 1;
++}
++
++static struct ipt_match ipt_rand_reg = {
++ {NULL, NULL},
++ "random",
++ ipt_rand_match,
++ ipt_rand_checkentry,
++ NULL,
++ THIS_MODULE };
++
++static int __init init(void)
++{
++ if (ipt_register_match(&ipt_rand_reg))
++ return -EINVAL;
++
++ printk("ipt_random match loaded\n");
++ return 0;
++}
++
++static void __exit fini(void)
++{
++ ipt_unregister_match(&ipt_rand_reg);
++ printk("ipt_random match unloaded\n");
++}
++
++module_init(init);
++module_exit(fini);
+diff -Naurp linux-2.4.34/net/ipv4/netfilter/Makefile linux-2.4.34.patched/net/ipv4/netfilter/Makefile
+--- linux-2.4.34/net/ipv4/netfilter/Makefile 2007-07-08 05:01:42.000000000 +0200
++++ linux-2.4.34.patched/net/ipv4/netfilter/Makefile 2007-07-08 05:02:26.000000000 +0200
+@@ -102,6 +102,8 @@ obj-$(CONFIG_IP_NF_MATCH_TOS) += ipt_tos
+ obj-$(CONFIG_IP_NF_MATCH_TIME) += ipt_time.o
+ obj-$(CONFIG_IP_NF_MATCH_CONDITION) += ipt_condition.o
+
++obj-$(CONFIG_IP_NF_MATCH_RANDOM) += ipt_random.o
++
+ obj-$(CONFIG_IP_NF_MATCH_RECENT) += ipt_recent.o
+
+ obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn.o
+diff -Naurp linux-2.4.34/net/ipv6/netfilter/Config.in linux-2.4.34.patched/net/ipv6/netfilter/Config.in
+--- linux-2.4.34/net/ipv6/netfilter/Config.in 2007-07-08 05:01:42.000000000 +0200
++++ linux-2.4.34.patched/net/ipv6/netfilter/Config.in 2007-07-08 05:02:26.000000000 +0200
+@@ -19,6 +19,7 @@ if [ "$CONFIG_IP6_NF_IPTABLES" != "n" ];
+ dep_tristate ' limit match support' CONFIG_IP6_NF_MATCH_LIMIT $CONFIG_IP6_NF_IPTABLES
+ dep_tristate ' condition match support' CONFIG_IP6_NF_MATCH_CONDITION $CONFIG_IP6_NF_IPTABLES
+ dep_tristate ' MAC address match support' CONFIG_IP6_NF_MATCH_MAC $CONFIG_IP6_NF_IPTABLES
++ dep_tristate ' Random match support' CONFIG_IP6_NF_MATCH_RANDOM $CONFIG_IP6_NF_IPTABLES
+ if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ dep_tristate ' Routing header match support (EXPERIMENTAL)' CONFIG_IP6_NF_MATCH_RT $CONFIG_IP6_NF_IPTABLES
+ fi
+diff -Naurp linux-2.4.34/net/ipv6/netfilter/ip6t_random.c linux-2.4.34.patched/net/ipv6/netfilter/ip6t_random.c
+--- linux-2.4.34/net/ipv6/netfilter/ip6t_random.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.34.patched/net/ipv6/netfilter/ip6t_random.c 2007-07-08 05:02:26.000000000 +0200
+@@ -0,0 +1,97 @@
++/*
++ This is a module which is used for a "random" match support.
++ This file is distributed under the terms of the GNU General Public
++ License (GPL). Copies of the GPL can be obtained from:
++ ftp://prep.ai.mit.edu/pub/gnu/GPL
++
++ 2001-10-14 Fabrice MARIE <fabrice@netfilter.org> : initial implementation.
++ 2003-04-30 Maciej Soltysiak <solt@dns.toxicfilms.tv> : IPv6 Port
++*/
++
++#include <linux/module.h>
++#include <linux/skbuff.h>
++#include <linux/ip.h>
++#include <linux/random.h>
++#include <net/tcp.h>
++#include <linux/spinlock.h>
++#include <linux/netfilter_ipv6/ip6_tables.h>
++#include <linux/netfilter_ipv6/ip6t_random.h>
++
++MODULE_LICENSE("GPL");
++
++static int
++ip6t_rand_match(const struct sk_buff *pskb,
++ const struct net_device *in,
++ const struct net_device *out,
++ const void *matchinfo,
++ int offset,
++ const void *hdr,
++ u_int16_t datalen,
++ int *hotdrop)
++{
++ /* Parameters from userspace */
++ const struct ip6t_rand_info *info = matchinfo;
++ u_int8_t random_number;
++
++ /* get 1 random number from the kernel random number generation routine */
++ get_random_bytes((void *)(&random_number), 1);
++
++ /* Do we match ? */
++ if (random_number <= info->average)
++ return 1;
++ else
++ return 0;
++}
++
++static int
++ip6t_rand_checkentry(const char *tablename,
++ const struct ip6t_ip6 *e,
++ void *matchinfo,
++ unsigned int matchsize,
++ unsigned int hook_mask)
++{
++ /* Parameters from userspace */
++ const struct ip6t_rand_info *info = matchinfo;
++
++ if (matchsize != IP6T_ALIGN(sizeof(struct ip6t_rand_info))) {
++ printk("ip6t_random: matchsize %u != %u\n", matchsize,
++ IP6T_ALIGN(sizeof(struct ip6t_rand_info)));
++ return 0;
++ }
++
++ /* must be 1 <= average % <= 99 */
++ /* 1 x 2.55 = 2 */
++ /* 99 x 2.55 = 252 */
++ if ((info->average < 2) || (info->average > 252)) {
++ printk("ip6t_random: invalid average %u\n", info->average);
++ return 0;
++ }
++
++ return 1;
++}
++
++static struct ip6t_match ip6t_rand_reg = {
++ {NULL, NULL},
++ "random",
++ ip6t_rand_match,
++ ip6t_rand_checkentry,
++ NULL,
++ THIS_MODULE };
++
++static int __init init(void)
++{
++ if (ip6t_register_match(&ip6t_rand_reg))
++ return -EINVAL;
++
++ printk("ip6t_random match loaded\n");
++ return 0;
++}
++
++static void __exit fini(void)
++{
++ ip6t_unregister_match(&ip6t_rand_reg);
++ printk("ip6t_random match unloaded\n");
++}
++
++module_init(init);
++module_exit(fini);
+diff -Naurp linux-2.4.34/net/ipv6/netfilter/Makefile linux-2.4.34.patched/net/ipv6/netfilter/Makefile
+--- linux-2.4.34/net/ipv6/netfilter/Makefile 2007-07-08 05:01:42.000000000 +0200
++++ linux-2.4.34.patched/net/ipv6/netfilter/Makefile 2007-07-08 05:02:26.000000000 +0200
+@@ -32,6 +32,7 @@ obj-$(CONFIG_IP6_NF_TARGET_MARK) += ip6t
+ obj-$(CONFIG_IP6_NF_TARGET_IMQ) += ip6t_IMQ.o
+ obj-$(CONFIG_IP6_NF_QUEUE) += ip6_queue.o
+ obj-$(CONFIG_IP6_NF_TARGET_LOG) += ip6t_LOG.o
++obj-$(CONFIG_IP6_NF_MATCH_RANDOM) += ip6t_random.o
+ obj-$(CONFIG_IP6_NF_MATCH_HL) += ip6t_hl.o
+
+ include $(TOPDIR)/Rules.make
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