openwrt-xburst/package/iptables/patches/008-chaostables.patch

diff -ruN iptables-1.3.5.orig/extensions/.CHAOS-test iptables-1.3.5/extensions/.CHAOS-test
--- iptables-1.3.5.orig/extensions/.CHAOS-test	1970-01-01 01:00:00.000000000 +0100
+++ iptables-1.3.5/extensions/.CHAOS-test	2007-01-09 16:05:23.251885840 +0100
@@ -0,0 +1,2 @@
+#!/bin/sh
+[ -f "$KERNEL_DIR/include/linux/netfilter/xt_CHAOS.h" ] && echo "CHAOS";
diff -ruN iptables-1.3.5.orig/extensions/.DELUDE-test iptables-1.3.5/extensions/.DELUDE-test
--- iptables-1.3.5.orig/extensions/.DELUDE-test	1970-01-01 01:00:00.000000000 +0100
+++ iptables-1.3.5/extensions/.DELUDE-test	2007-01-09 16:05:18.104057722 +0100
@@ -0,0 +1,2 @@
+#!/bin/sh
+echo "DELUDE";
diff -ruN iptables-1.3.5.orig/extensions/libipt_CHAOS.c iptables-1.3.5/extensions/libipt_CHAOS.c
--- iptables-1.3.5.orig/extensions/libipt_CHAOS.c	1970-01-01 01:00:00.000000000 +0100
+++ iptables-1.3.5/extensions/libipt_CHAOS.c	2007-01-09 16:05:23.251885840 +0100
@@ -0,0 +1,111 @@
+/*
+    CHAOS target for iptables
+
+    Copyright © Jan Engelhardt <jengelh [at] gmx de>, 2006 - 2007
+    released under the terms of the GNU General Public
+    License version 2.x and only versions 2.x.
+*/
+#include <getopt.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <iptables.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter/xt_CHAOS.h>
+
+static void libipt_chaos_help(void)
+{
+	printf(
+		"CHAOS target v%s options:\n"
+		"  --delude     Enable DELUDE processing for TCP\n"
+		"  --tarpit     Enable TARPIT processing for TCP\n",
+		IPTABLES_VERSION);
+	return;
+}
+
+static int libipt_chaos_parse(int c, char **argv, int invert,
+    unsigned int *flags, const struct ipt_entry *entry,
+    struct ipt_entry_target **target)
+{
+	struct xt_chaos_info *info = (void *)((*target)->data);
+	switch(c) {
+		case 'd':
+			info->variant = XTCHAOS_DELUDE;
+			*flags |= 0x02;
+			return 1;
+		case 't':
+			info->variant = XTCHAOS_TARPIT;
+			*flags |= 0x01;
+			return 1;
+	}
+	return 0;
+}
+
+static void libipt_chaos_check(unsigned int flags)
+{
+	if(flags != 0x03)
+		return;
+	/* If flags == 0x03, both were specified, which should not be. */
+	exit_error(PARAMETER_PROBLEM,
+	           "CHAOS: only one of --tarpit or --delude may be specified");
+	return;
+}
+
+static void libipt_chaos_print(const struct ipt_ip *ip,
+    const struct ipt_entry_target *target, int numeric)
+{
+	const struct xt_chaos_info *info = (const void *)target->data;
+	switch(info->variant) {
+		case XTCHAOS_DELUDE:
+			printf("DELUDE ");
+			break;
+		case XTCHAOS_TARPIT:
+			printf("TARPIT ");
+			break;
+		default:
+			break;
+	}
+	return;
+}
+
+static void libipt_chaos_save(const struct ipt_ip *ip,
+    const struct ipt_entry_target *target)
+{
+	const struct xt_chaos_info *info = (const void *)target->data;
+	switch(info->variant) {
+		case XTCHAOS_DELUDE:
+			printf("--delude ");
+			break;
+		case XTCHAOS_TARPIT:
+			printf("--tarpit ");
+			break;
+		default:
+			break;
+	}
+	return;
+}
+
+static struct option libipt_chaos_opts[] = {
+	{"delude", 0, NULL, 'd'},
+	{"tarpit", 0, NULL, 't'},
+	{NULL},
+};
+
+static struct iptables_target libipt_chaos_info = {
+	.name          = "CHAOS",
+	.version       = IPTABLES_VERSION,
+	.size          = IPT_ALIGN(sizeof(struct xt_chaos_info)),
+	.userspacesize = IPT_ALIGN(sizeof(struct xt_chaos_info)),
+	.help          = libipt_chaos_help,
+	.parse         = libipt_chaos_parse,
+	.final_check   = libipt_chaos_check,
+	.print         = libipt_chaos_print,
+	.save          = libipt_chaos_save,
+	.extra_opts    = libipt_chaos_opts,
+};
+
+static __attribute__((constructor)) void libipt_chaos_init(void)
+{
+	register_target(&libipt_chaos_info);
+	return;
+}
diff -ruN iptables-1.3.5.orig/extensions/libipt_DELUDE.c iptables-1.3.5/extensions/libipt_DELUDE.c
--- iptables-1.3.5.orig/extensions/libipt_DELUDE.c	1970-01-01 01:00:00.000000000 +0100
+++ iptables-1.3.5/extensions/libipt_DELUDE.c	2007-01-09 16:05:18.104057722 +0100
@@ -0,0 +1,66 @@
+/*
+    DELUDE target for iptables
+
+    Copyright © Jan Engelhardt <jengelh [at] gmx de>, 2006 - 2007
+    released under the terms of the GNU General Public
+    License version 2.x and only versions 2.x.
+*/
+#include <getopt.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <iptables.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+
+static void libipt_delude_help(void)
+{
+	printf("DELUDE takes no options\n");
+	return;
+}
+
+static int libipt_delude_parse(int c, char **argv, int invert,
+    unsigned int *flags, const struct ipt_entry *entry,
+    struct ipt_entry_target **target)
+{
+	return 0;
+}
+
+static void libipt_delude_check(unsigned int flags)
+{
+	return;
+}
+
+static void libipt_delude_print(const struct ipt_ip *ip,
+    const struct ipt_entry_target *target, int numeric)
+{
+	return;
+}
+
+static void libipt_delude_save(const struct ipt_ip *ip,
+    const struct ipt_entry_target *target)
+{
+	return;
+}
+
+static struct option libipt_delude_opts[] = {
+	{NULL},
+};
+
+static struct iptables_target libipt_delude_info = {
+	.name          = "DELUDE",
+	.version       = IPTABLES_VERSION,
+	.size          = IPT_ALIGN(0),
+	.userspacesize = IPT_ALIGN(0),
+	.help          = libipt_delude_help,
+	.parse         = libipt_delude_parse,
+	.final_check   = libipt_delude_check,
+	.print         = libipt_delude_print,
+	.save          = libipt_delude_save,
+	.extra_opts    = libipt_delude_opts,
+};
+
+static __attribute__((constructor)) void libipt_delude_init(void)
+{
+	register_target(&libipt_delude_info);
+	return;
+}
diff -ruN iptables-1.3.5.orig/extensions/libipt_portscan.c iptables-1.3.5/extensions/libipt_portscan.c
--- iptables-1.3.5.orig/extensions/libipt_portscan.c	1970-01-01 01:00:00.000000000 +0100
+++ iptables-1.3.5/extensions/libipt_portscan.c	2007-01-09 16:05:14.228187134 +0100
@@ -0,0 +1,129 @@
+/*
+    portscan match for iptables
+
+    Copyright © Jan Engelhardt <jengelh [at] gmx de>, 2006 - 2007
+    released under the terms of the GNU General Public
+    License version 2.x and only versions 2.x.
+*/
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include <iptables.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter/xt_portscan.h>
+
+static void libipt_portscan_help(void)
+{
+	printf(
+		"portscan match v%s options:\n"
+		"(Combining them will make them match by OR-logic)\n"
+		"  --stealth    Match TCP Stealth packets\n"
+		"  --synscan    Match TCP SYN scans\n"
+		"  --cnscan     Match TCP Connect scans\n"
+		"  --grscan     Match Banner Grabbing scans\n",
+		IPTABLES_VERSION);
+	return;
+}
+
+static void libipt_portscan_mtinit(struct ipt_entry_match *match,
+    unsigned int *nfcache)
+{
+	/* Cannot cache this */
+	*nfcache |= NFC_UNKNOWN;
+	return;
+}
+
+static int libipt_portscan_parse(int c, char **argv, int invert,
+    unsigned int *flags, const struct ipt_entry *entry, unsigned int *nfc,
+    struct ipt_entry_match **match)
+{
+	struct xt_portscan_info *info = (void *)((*match)->data);
+
+	switch(c) {
+		case 'c':
+			info->match_cn = 1;
+			return 1;
+		case 'g':
+			info->match_gr = 1;
+			return 1;
+		case 's':
+			info->match_syn = 1;
+			return 1;
+		case 'x':
+			info->match_stealth = 1;
+			return 1;
+		default:
+			return 0;
+	}
+}
+
+static void libipt_portscan_check(unsigned int flags)
+{
+	return;
+}
+
+static void libipt_portscan_print(const struct ipt_ip *ip,
+    const struct ipt_entry_match *match, int numeric)
+{
+	const struct xt_portscan_info *info = (const void *)(match->data);
+	const char *s = "";
+
+	printf("portscan ");
+	if(info->match_stealth) {
+		printf("STEALTH");
+		s = ",";
+	}
+	if(info->match_syn) {
+		printf("%sSYNSCAN", s);
+		s = ",";
+	}
+	if(info->match_cn) {
+		printf("%sCNSCAN", s);
+		s = ",";
+	}
+	if(info->match_gr)
+		printf("%sGRSCAN", s);
+	printf(" ");
+	return;
+}
+
+static void libipt_portscan_save(const struct ipt_ip *ip,
+    const struct ipt_entry_match *match)
+{
+	const struct xt_portscan_info *info = (const void *)(match->data);
+	if(info->match_stealth)	printf("--stealth ");
+	if(info->match_syn)	printf("--synscan ");
+	if(info->match_cn)	printf("--cnscan ");
+	if(info->match_gr)	printf("--grscan ");
+	return;
+}
+
+static struct option libipt_portscan_opts[] = {
+	{"stealth", 0, NULL, 'x'},
+	{"synscan", 0, NULL, 's'},
+	{"cnscan",  0, NULL, 'c'},
+	{"grscan",  0, NULL, 'g'},
+	{NULL},
+};
+
+static struct iptables_match libipt_portscan_info = {
+	.name          = "portscan",
+	.version       = IPTABLES_VERSION,
+	.size          = IPT_ALIGN(sizeof(struct xt_portscan_info)),
+	.userspacesize = IPT_ALIGN(sizeof(struct xt_portscan_info)),
+	.help          = libipt_portscan_help,
+	.init          = libipt_portscan_mtinit,
+	.parse         = libipt_portscan_parse,
+	.final_check   = libipt_portscan_check,
+	.print         = libipt_portscan_print,
+	.save          = libipt_portscan_save,
+	.extra_opts    = libipt_portscan_opts,
+};
+
+static __attribute__((constructor)) void libipt_portscan_init(void)
+{
+	register_match(&libipt_portscan_info);
+	return;
+}
diff -ruN iptables-1.3.5.orig/extensions/.portscan-test iptables-1.3.5/extensions/.portscan-test
--- iptables-1.3.5.orig/extensions/.portscan-test	1970-01-01 01:00:00.000000000 +0100
+++ iptables-1.3.5/extensions/.portscan-test	2007-01-09 16:05:14.228187134 +0100
@@ -0,0 +1,2 @@
+#!/bin/sh
+[ -f "$KERNEL_DIR/include/linux/netfilter/xt_portscan.h" ] && echo "portscan";