diff -Nur iptables-1.4.1.1/extensions/libxt_smack.c iptables-1.4.1.1-new/extensions/libxt_smack.c
--- iptables-1.4.1.1/extensions/libxt_smack.c	1970-01-01 01:00:00.000000000 +0100
+++ iptables-1.4.1.1-new/extensions/libxt_smack.c	2008-09-11 18:15:23.000000000 +0200
@@ -0,0 +1,129 @@
+#include <stdbool.h>
+#include <stdio.h>
+#include <netdb.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include <xtables.h>
+#include <linux/netfilter/xt_smack.h>
+
+/* Function which prints out usage message. */
+static void smack_help(void)
+{
+	printf(
+"smack match options:\n"
+"[!] --in       label      Match socket in label\n"
+"[!] --out      label      Match socket out label\n"
+"[!] --tcp-peer label      Match TCP peer label (CIPSO)\n");
+}
+
+
+static const struct option smack_opts[] = {
+	{.name = "in",       .has_arg = true, .val = 'i'},
+	{.name = "out",      .has_arg = true, .val = 'o'},
+	{.name = "tcp-peer", .has_arg = true, .val = 'p'},
+	{ .name = NULL }
+};
+
+static void parse_label(const char *s, char *d)
+{	
+	int slen = strlen(s);
+
+	if (slen >= SMK_LABELLEN) {
+		exit_error(PARAMETER_PROBLEM,
+			"SMACK label must be shorter than %i characters", SMK_LABELLEN);
+	}
+	strcpy(d, s);
+}
+
+static int smack_parse(int c, char **argv, int invert, unsigned int *flags,
+                          const void *entry, struct xt_entry_match **match)
+{
+	struct xt_smack_match_info *info = (void *)(*match)->data;
+
+	switch (c) {
+	case 'i':
+		param_act(P_ONLY_ONCE, "smack", "--in", *flags & XT_SMACK_IN);
+		
+		if (invert)
+			info->invert |= XT_SMACK_IN;
+		info->mask  |= XT_SMACK_IN;
+		parse_label(optarg, info->match_in);
+		*flags       |= XT_SMACK_IN;
+		return true;
+
+	case 'o':
+		param_act(P_ONLY_ONCE, "smack", "--out", *flags & XT_SMACK_OUT);
+		
+		if (invert)
+			info->invert |= XT_SMACK_OUT;
+		info->mask  |= XT_SMACK_OUT;
+		parse_label(optarg, info->match_out);
+		*flags       |= XT_SMACK_OUT;
+		return true;
+
+	case 'p':
+		param_act(P_ONLY_ONCE, "smack", "--tcp-peer", *flags & XT_SMACK_PEER);
+		
+		if (invert)
+			info->invert |= XT_SMACK_PEER;
+		info->mask  |= XT_SMACK_PEER;
+		parse_label(optarg, info->match_peer_packet);
+		*flags       |= XT_SMACK_PEER;
+		return true;
+	}
+	return false;
+}
+
+static void smack_check(unsigned int flags)
+{
+	if (!flags)
+		exit_error(PARAMETER_PROBLEM,
+			   "SMACK match: You must at least specify one match");
+}
+
+static void smack_save_item(const char *param, const char *label, u_int8_t invert){
+	if (invert)
+		printf("! ");
+	printf("--%s \"%s\" ", param, label);
+}
+
+static void smack_save(const void *ip, const struct xt_entry_match *match)
+{
+	struct xt_smack_match_info *info = (struct xt_smack_match_info *)match->data;
+
+	if(info->mask & XT_SMACK_IN)
+		smack_save_item("in", info->match_in, info->invert & XT_SMACK_IN);
+	if(info->mask & XT_SMACK_OUT)
+		smack_save_item("out", info->match_out, info->invert & XT_SMACK_OUT);
+	if(info->mask & XT_SMACK_PEER)
+		smack_save_item("tcp-peer", info->match_peer_packet, info->invert & XT_SMACK_PEER);
+
+}
+
+static void smack_print(const void *ip, const struct xt_entry_match *match, int numeric)
+{
+	printf("SMACK label match ");
+	smack_save(ip, match);
+	
+}
+
+static struct xtables_match smack_match = {
+	.family		= AF_UNSPEC,
+	.name		= "smack",
+	.version	= XTABLES_VERSION,
+	.size		= XT_ALIGN(sizeof(struct xt_smack_match_info)),
+	.userspacesize	= XT_ALIGN(sizeof(struct xt_smack_match_info)),
+	.help		= smack_help,
+	.parse		= smack_parse,
+	.final_check	= smack_check,
+	.print		= smack_print,
+	.save		= smack_save,
+	.extra_opts	= smack_opts,
+};
+
+void _init(void)
+{
+	xtables_register_match(&smack_match);
+}
diff -Nur iptables-1.4.1.1/include/linux/netfilter/xt_smack.h iptables-1.4.1.1-new/include/linux/netfilter/xt_smack.h
--- iptables-1.4.1.1/include/linux/netfilter/xt_smack.h	1970-01-01 01:00:00.000000000 +0100
+++ iptables-1.4.1.1-new/include/linux/netfilter/xt_smack.h	2008-09-11 17:36:25.000000000 +0200
@@ -0,0 +1,21 @@
+#ifndef _XT_SMACK_MATCH_H
+#define _XT_SMACK_MATCH_H
+
+#define SMK_MAXLEN      23
+#define SMK_LABELLEN    (SMK_MAXLEN+1)
+
+enum {
+	XT_SMACK_IN   = 1 << 0,
+	XT_SMACK_OUT  = 1 << 1,
+	XT_SMACK_PEER = 1 << 2,
+};
+
+struct xt_smack_match_info {
+	u_int8_t	mask, invert;
+	char    	match_in[SMK_LABELLEN];
+	char    	match_out[SMK_LABELLEN];
+	char    	match_peer_packet[SMK_LABELLEN];
+
+};
+
+#endif /* _XT_SMACK_MATCH_H */