iptables: remove CHAOS and TARPIT patches

SVN-Revision: 14447

package/iptables/Makefile

@@ -20,7 +20,7 @@ endif
 
 ifeq ($(CONFIG_LINUX_2_6),y)
   PKG_VERSION:=1.4.1.1
-  PKG_RELEASE:=1
+  PKG_RELEASE:=2
   PKG_MD5SUM:=723fa88d8a0915e184f99e03e9bf06cb
 endif
 
@@ -259,7 +259,7 @@ TARGET_CFLAGS += $(FPIC)
 CONFIGURE_ARGS += \
 	--enable-devel \
 	--with-kernel="$(LINUX_DIR)" \
-	--with-xtlibdir=/usr/lib/iptables 
+	--with-xtlibdir=/usr/lib/iptables
 
 define Build/Compile
 	mkdir -p $(PKG_INSTALL_DIR)

package/iptables/patches/1.4.1.1/006-chaostables_0.8.patch

@@ -1,393 +0,0 @@
-Index: iptables-1.4.0/extensions/.CHAOS-testx
-===================================================================
---- /dev/null
-+++ iptables-1.4.0/extensions/.CHAOS-testx
-@@ -0,0 +1,3 @@
-+#! /bin/sh
-+
-+[ -f "$KERNEL_DIR/include/linux/netfilter/xt_CHAOS.h" ] && echo "CHAOS"
-Index: iptables-1.4.0/extensions/libxt_CHAOS.c
-===================================================================
---- /dev/null
-+++ iptables-1.4.0/extensions/libxt_CHAOS.c
-@@ -0,0 +1,114 @@
-+/*
-+ *	CHAOS target for iptables
-+ *	Copyright © CC Computer Consultants GmbH, 2006 - 2007
-+ *	Contact: Jan Engelhardt <jengelh@computergmbh.de>
-+ *
-+ *	This program is free software; you can redistribute it and/or modify
-+ *	it under the terms of the GNU General Public License; either version
-+ *	2 or 3 as published by the Free Software Foundation.
-+ */
-+#include <getopt.h>
-+#include <stdbool.h>
-+#include <stdio.h>
-+#include <string.h>
-+
-+#include <xtables.h>
-+#include <linux/netfilter/x_tables.h>
-+#include <linux/netfilter/xt_CHAOS.h>
-+
-+enum {
-+	F_DELUDE = 1 << 0,
-+	F_TARPIT = 1 << 1,
-+};
-+
-+static const struct option chaos_tg_opts[] = {
-+	{.name = "delude", .has_arg = false, .val = 'd'},
-+	{.name = "tarpit", .has_arg = false, .val = 't'},
-+	{},
-+};
-+
-+static void chaos_tg_help(void)
-+{
-+	printf(
-+		"CHAOS target v%s options:\n"
-+		"  --delude     Enable DELUDE processing for TCP\n"
-+		"  --tarpit     Enable TARPIT processing for TCP\n",
-+		XTABLES_VERSION);
-+	return;
-+}
-+
-+static int chaos_tg_parse(int c, char **argv, int invert, unsigned int *flags,
-+    const void *entry, struct xt_entry_target **target)
-+{
-+	struct xt_chaos_target_info *info = (void *)((*target)->data);
-+	switch (c) {
-+		case 'd':
-+			info->variant = XTCHAOS_DELUDE;
-+			*flags |= F_DELUDE;
-+			return true;
-+		case 't':
-+			info->variant = XTCHAOS_TARPIT;
-+			*flags |= F_TARPIT;
-+			return true;
-+	}
-+	return false;
-+}
-+
-+static void chaos_tg_check(unsigned int flags)
-+{
-+	if ((flags & (F_DELUDE | F_TARPIT)) == (F_DELUDE | F_TARPIT))
-+		/* 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 chaos_tg_print(const void *ip,
-+    const struct xt_entry_target *target, int numeric)
-+{
-+	const struct xt_chaos_target_info *info = (const void *)target->data;
-+	switch (info->variant) {
-+		case XTCHAOS_DELUDE:
-+			printf("DELUDE ");
-+			break;
-+		case XTCHAOS_TARPIT:
-+			printf("TARPIT ");
-+			break;
-+	}
-+	return;
-+}
-+
-+static void chaos_tg_save(const void *ip, const struct xt_entry_target *target)
-+{
-+	const struct xt_chaos_target_info *info = (const void *)target->data;
-+	switch (info->variant) {
-+		case XTCHAOS_DELUDE:
-+			printf("--delude ");
-+			break;
-+		case XTCHAOS_TARPIT:
-+			printf("--tarpit ");
-+			break;
-+	}
-+	return;
-+}
-+
-+static struct xtables_target chaos_tg_reg = {
-+	.version       = XTABLES_VERSION,
-+	.name          = "CHAOS",
-+	.family        = AF_INET,
-+	.size          = XT_ALIGN(sizeof(struct xt_chaos_target_info)),
-+	.userspacesize = XT_ALIGN(sizeof(struct xt_chaos_target_info)),
-+	.help          = chaos_tg_help,
-+	.parse         = chaos_tg_parse,
-+	.final_check   = chaos_tg_check,
-+	.print         = chaos_tg_print,
-+	.save          = chaos_tg_save,
-+	.extra_opts    = chaos_tg_opts,
-+};
-+
-+void _init(void)
-+{
-+	xtables_register_target(&chaos_tg_reg);
-+	return;
-+}
-Index: iptables-1.4.0/extensions/libxt_CHAOS.man
-===================================================================
---- /dev/null
-+++ iptables-1.4.0/extensions/libxt_CHAOS.man
-@@ -0,0 +1,18 @@
-+Causes confusion on the other end by doing odd things with incoming packets.
-+CHAOS will randomly reply (or not) with one of its configurable subtargets:
-+.TP
-+\fB--delude\fR
-+Use the REJECT and DELUDE targets as a base to do a sudden or deferred
-+connection reset, fooling some network scanners to return non-deterministic
-+(randomly open/closed) results, and in case it is deemed open, it is actually
-+closed/filtered.
-+.TP
-+\fB--tarpit\fR
-+Use the REJECT and TARPIT target as a base to hold the connection until it
-+times out. This consumes conntrack entries when connection tracking is loaded
-+(which usually is on most machines), and routers inbetween you and the Internet
-+may fail to do their connection tracking if they have to handle more
-+connections than they can.
-+.PP
-+The randomness factor of not replying vs. replying can be set during load-time
-+of the xt_CHAOS module or during runtime in /sys/modules/xt_CHAOS/parameters.
-Index: iptables-1.4.0/extensions/.DELUDE-testx
-===================================================================
---- /dev/null
-+++ iptables-1.4.0/extensions/.DELUDE-testx
-@@ -0,0 +1,3 @@
-+#! /bin/sh
-+
-+[ -f "$KERNEL_DIR/net/netfilter/xt_DELUDE.c" ] && echo "DELUDE"
-Index: iptables-1.4.0/extensions/libxt_DELUDE.c
-===================================================================
---- /dev/null
-+++ iptables-1.4.0/extensions/libxt_DELUDE.c
-@@ -0,0 +1,49 @@
-+/*
-+ *	DELUDE target for iptables
-+ *	Copyright © CC Computer Consultants GmbH, 2006 - 2007
-+ *	Contact: Jan Engelhardt <jengelh@computergmbh.de>
-+ *
-+ *	This program is free software; you can redistribute it and/or modify
-+ *	it under the terms of the GNU General Public License; either version
-+ *	2 or 3 as published by the Free Software Foundation.
-+ */
-+#include <getopt.h>
-+#include <stdio.h>
-+#include <string.h>
-+
-+#include <xtables.h>
-+#include <linux/netfilter/x_tables.h>
-+
-+static void delude_tg_help(void)
-+{
-+	printf("DELUDE takes no options\n");
-+	return;
-+}
-+
-+static int delude_tg_parse(int c, char **argv, int invert, unsigned int *flags,
-+    const void *entry, struct xt_entry_target **target)
-+{
-+	return 0;
-+}
-+
-+static void delude_tg_check(unsigned int flags)
-+{
-+	return;
-+}
-+
-+static struct xtables_target delude_tg_reg = {
-+	.version       = XTABLES_VERSION,
-+	.name          = "DELUDE",
-+	.family        = AF_INET,
-+	.size          = XT_ALIGN(0),
-+	.userspacesize = XT_ALIGN(0),
-+	.help          = delude_tg_help,
-+	.parse         = delude_tg_parse,
-+	.final_check   = delude_tg_check,
-+};
-+
-+void _init(void)
-+{
-+	xtables_register_target(&delude_tg_reg);
-+	return;
-+}
-Index: iptables-1.4.0/extensions/libxt_DELUDE.man
-===================================================================
---- /dev/null
-+++ iptables-1.4.0/extensions/libxt_DELUDE.man
-@@ -0,0 +1,4 @@
-+The DELUDE target will reply to a SYN packet with SYN-ACK, and to all other
-+packets with an RST. This will terminate the connection much like REJECT, but
-+network scanners doing TCP half-open discovery can be spoofed to make them
-+belive the port is open rather than closed/filtered.
-Index: iptables-1.4.0/extensions/.portscan-testx
-===================================================================
---- /dev/null
-+++ iptables-1.4.0/extensions/.portscan-testx
-@@ -0,0 +1,3 @@
-+#! /bin/sh
-+
-+[ -f "$KERNEL_DIR/include/linux/netfilter/xt_portscan.h" ] && echo "portscan"
-Index: iptables-1.4.0/extensions/libxt_portscan.c
-===================================================================
---- /dev/null
-+++ iptables-1.4.0/extensions/libxt_portscan.c
-@@ -0,0 +1,127 @@
-+/*
-+ *	portscan match for iptables
-+ *	Copyright © CC Computer Consultants GmbH, 2006 - 2007
-+ *	Contact: Jan Engelhardt <jengelh@computergmbh.de>
-+ *
-+ *	This program is free software; you can redistribute it and/or modify
-+ *	it under the terms of the GNU General Public License; either version
-+ *	2 or 3 as published by the Free Software Foundation.
-+ */
-+#include <stdbool.h>
-+#include <stdio.h>
-+#include <string.h>
-+#include <stdlib.h>
-+#include <getopt.h>
-+
-+#include <xtables.h>
-+#include <iptables.h>
-+#include <linux/netfilter/x_tables.h>
-+#include <linux/netfilter/xt_portscan.h>
-+
-+static const struct option portscan_mt_opts[] = {
-+	{.name = "stealth", .has_arg = false, .val = 'x'},
-+	{.name = "synscan", .has_arg = false, .val = 's'},
-+	{.name = "cnscan",  .has_arg = false, .val = 'c'},
-+	{.name = "grscan",  .has_arg = false, .val = 'g'},
-+	{},
-+};
-+
-+static void portscan_mt_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",
-+		XTABLES_VERSION);
-+	return;
-+}
-+
-+static int portscan_mt_parse(int c, char **argv, int invert,
-+    unsigned int *flags, const void *entry, struct xt_entry_match **match)
-+{
-+	struct xt_portscan_match_info *info = (void *)((*match)->data);
-+
-+	switch (c) {
-+		case 'c':
-+			info->match_cn = true;
-+			return true;
-+		case 'g':
-+			info->match_gr = true;
-+			return true;
-+		case 's':
-+			info->match_syn = true;
-+			return true;
-+		case 'x':
-+			info->match_stealth = true;
-+			return true;
-+	}
-+	return false;
-+}
-+
-+static void portscan_mt_check(unsigned int flags)
-+{
-+	return;
-+}
-+
-+static void portscan_mt_print(const void *ip,
-+    const struct xt_entry_match *match, int numeric)
-+{
-+	const struct xt_portscan_match_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 portscan_mt_save(const void *ip, const struct xt_entry_match *match)
-+{
-+	const struct xt_portscan_match_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 xtables_match portscan_mt_reg = {
-+	.version       = XTABLES_VERSION,
-+	.name          = "portscan",
-+	.family        = AF_INET,
-+	.size          = XT_ALIGN(sizeof(struct xt_portscan_match_info)),
-+	.userspacesize = XT_ALIGN(sizeof(struct xt_portscan_match_info)),
-+	.help          = portscan_mt_help,
-+	.parse         = portscan_mt_parse,
-+	.final_check   = portscan_mt_check,
-+	.print         = portscan_mt_print,
-+	.save          = portscan_mt_save,
-+	.extra_opts    = portscan_mt_opts,
-+};
-+
-+void _init(void)
-+{
-+	xtables_register_match(&portscan_mt_reg);
-+	return;
-+}
-Index: iptables-1.4.0/extensions/libxt_portscan.man
-===================================================================
---- /dev/null
-+++ iptables-1.4.0/extensions/libxt_portscan.man
-@@ -0,0 +1,27 @@
-+Detects simple port scan attemps based upon the packet's contents. (This is
-+different from other implementations, which also try to match the rate of new
-+connections.) Note that an attempt is only discovered after it has been carried
-+out, but this information can be used in conjunction with other rules to block
-+the remote host's future connections. So this match module will match on the
-+(probably) last packet the remote side will send to your machine.
-+.TP
-+\fB--stealth\fR
-+Match if the packet did not belong to any known TCP connection
-+(Stealth/FIN/XMAS/NULL scan).
-+.TP
-+\fB--synscan\fR
-+Match if the connection was a TCP half-open discovery (SYN scan), i.e. the
-+connection was torn down after the 2nd packet in the 3-way handshake.
-+.TP
-+\fB--cnscan\fR
-+Match if the connection was a TCP full open discovery (connect scan), i.e. the
-+connection was torn down after completion of the 3-way handshake.
-+.TP
-+\fB--grscan\fR
-+Match if data in the connection only flew in the direction of the remote side,
-+e.g. if the connection was terminated after a locally running daemon sent its
-+identification. (e.g. openssh)
-+.PP
-+NOTE: Some clients (Windows XP for example) may do what looks like a SYN scan,
-+so be advised to carefully use xt_portscan in conjunction with blocking rules,
-+as it may lock out your very own internal network.

package/iptables/patches/1.4.1.1/007-tarpit_support.patch

@@ -1,106 +0,0 @@
-Index: iptables-1.4.0/extensions/libxt_TARPIT.c
-===================================================================
---- /dev/null
-+++ iptables-1.4.0/extensions/libxt_TARPIT.c
-@@ -0,0 +1,55 @@
-+/* Shared library add-on to iptables to add TARPIT target support */
-+#include <stdio.h>
-+#include <getopt.h>
-+
-+#include <xtables.h>
-+#include <linux/netfilter/x_tables.h>
-+
-+static void TARPIT_help(void)
-+{
-+	fputs(
-+"TARPIT takes no options\n"
-+"\n", stdout);
-+}
-+
-+static struct option TARPIT_opts[] = {
-+	{ 0 }
-+};
-+
-+static int TARPIT_parse(int c, char **argv, int invert, unsigned int *flags,
-+			const void *entry, struct xt_entry_target **target)
-+{
-+	return 0;
-+}
-+
-+static void TARPIT_final_check(unsigned int flags)
-+{
-+}
-+
-+static void TARPIT_print(const void *ip, const struct xt_entry_target *target,
-+			int numeric)
-+{
-+}
-+
-+static void TARPIT_save(const void *ip, const struct xt_entry_target *target)
-+{
-+}
-+
-+static struct xtables_target tarpit_target = {
-+	.family		= AF_INET,
-+	.name		= "TARPIT",
-+	.version	= XTABLES_VERSION,
-+	.size		= XT_ALIGN(0),
-+	.userspacesize	= XT_ALIGN(0),
-+	.help		= TARPIT_help,
-+	.parse		= TARPIT_parse,
-+	.final_check	= TARPIT_final_check,
-+	.print		= TARPIT_print,
-+	.save		= TARPIT_save,
-+	.extra_opts	= TARPIT_opts
-+};
-+
-+void _init(void)
-+{
-+	xtables_register_target(&tarpit_target);
-+}
-Index: iptables-1.4.0/extensions/libxt_TARPIT.man
-===================================================================
---- /dev/null
-+++ iptables-1.4.0/extensions/libxt_TARPIT.man
-@@ -0,0 +1,34 @@
-+Captures and holds incoming TCP connections using no local
-+per-connection resources. Connections are accepted, but immediately
-+switched to the persist state (0 byte window), in which the remote
-+side stops sending data and asks to continue every 60-240 seconds.
-+Attempts to close the connection are ignored, forcing the remote side
-+to time out the connection in 12-24 minutes.
-+
-+This offers similar functionality to LaBrea
-+<http://www.hackbusters.net/LaBrea/> but doesn't require dedicated
-+hardware or IPs. Any TCP port that you would normally DROP or REJECT
-+can instead become a tarpit.
-+
-+To tarpit connections to TCP port 80 destined for the current machine:
-+.IP
-+iptables -A INPUT -p tcp -m tcp --dport 80 -j TARPIT
-+.P
-+To significantly slow down Code Red/Nimda-style scans of unused address
-+space, forward unused ip addresses to a Linux box not acting as a router
-+(e.g. "ip route 10.0.0.0 255.0.0.0 ip.of.linux.box" on a Cisco), enable IP
-+forwarding on the Linux box, and add:
-+.IP
-+iptables -A FORWARD -p tcp -j TARPIT
-+.IP
-+iptables -A FORWARD -j DROP
-+.TP
-+NOTE:
-+If you use the conntrack module while you are using TARPIT, you should
-+also use the NOTRACK target, or the kernel will unnecessarily allocate
-+resources for each TARPITted connection. To TARPIT incoming
-+connections to the standard IRC port while using conntrack, you could:
-+.IP
-+iptables -t raw -A PREROUTING -p tcp --dport 6667 -j NOTRACK
-+.IP
-+iptables -A INPUT -p tcp --dport 6667 -j TARPIT
-Index: iptables-1.4.0/extensions/.TARPIT-testx
-===================================================================
---- /dev/null
-+++ iptables-1.4.0/extensions/.TARPIT-testx
-@@ -0,0 +1,2 @@
-+#! /bin/sh
-+[ -f "$KERNEL_DIR/net/netfilter/xt_TARPIT.c" ] && echo "TARPIT"