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

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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";
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