Tizen 2.1 basesubmit/tizen_2.2/20130714.145952submit/tizen_2.1/20130424.225212accepted/tizen_2.1/20130425.0251492.2_release2.1b_releasetizen_2.1

1 files changed, 1243 insertions, 0 deletions

diff --git a/extensions/libxt_conntrack.c b/extensions/libxt_conntrack.c
new file mode 100644
index 0000000..5557d3e
--- /dev/null
+++ b/extensions/libxt_conntrack.c
@@ -0,0 +1,1243 @@
+/*
+ *	libxt_conntrack
+ *	Shared library add-on to iptables for conntrack matching support.
+ *
+ *	GPL (C) 2001  Marc Boucher (marc@mbsi.ca).
+ *	Copyright © CC Computer Consultants GmbH, 2007 - 2008
+ *	Jan Engelhardt <jengelh@computergmbh.de>
+ */
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <ctype.h>
+#include <getopt.h>
+#include <netdb.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <xtables.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter/xt_conntrack.h>
+#include <linux/netfilter/nf_conntrack_common.h>
+#include <arpa/inet.h>
+
+struct ip_conntrack_old_tuple {
+	struct {
+		__be32 ip;
+		union {
+			__u16 all;
+		} u;
+	} src;
+
+	struct {
+		__be32 ip;
+		union {
+			__u16 all;
+		} u;
+
+		/* The protocol. */
+		__u16 protonum;
+	} dst;
+};
+
+struct xt_conntrack_info {
+	unsigned int statemask, statusmask;
+
+	struct ip_conntrack_old_tuple tuple[IP_CT_DIR_MAX];
+	struct in_addr sipmsk[IP_CT_DIR_MAX], dipmsk[IP_CT_DIR_MAX];
+
+	unsigned long expires_min, expires_max;
+
+	/* Flags word */
+	u_int8_t flags;
+	/* Inverse flags */
+	u_int8_t invflags;
+};
+
+static void conntrack_mt_help(void)
+{
+	printf(
+"conntrack match options:\n"
+"[!] --ctstate {INVALID|ESTABLISHED|NEW|RELATED|UNTRACKED|SNAT|DNAT}[,...]\n"
+"                               State(s) to match\n"
+"[!] --ctproto proto            Protocol to match; by number or name, e.g. \"tcp\"\n"
+"[!] --ctorigsrc address[/mask]\n"
+"[!] --ctorigdst address[/mask]\n"
+"[!] --ctreplsrc address[/mask]\n"
+"[!] --ctrepldst address[/mask]\n"
+"                               Original/Reply source/destination address\n"
+"[!] --ctorigsrcport port\n"
+"[!] --ctorigdstport port\n"
+"[!] --ctreplsrcport port\n"
+"[!] --ctrepldstport port\n"
+"                               TCP/UDP/SCTP orig./reply source/destination port\n"
+"[!] --ctstatus {NONE|EXPECTED|SEEN_REPLY|ASSURED|CONFIRMED}[,...]\n"
+"                               Status(es) to match\n"
+"[!] --ctexpire time[:time]     Match remaining lifetime in seconds against\n"
+"                               value or range of values (inclusive)\n"
+"    --ctdir {ORIGINAL|REPLY}   Flow direction of packet\n");
+}
+
+static const struct option conntrack_mt_opts_v0[] = {
+	{.name = "ctstate",   .has_arg = true, .val = '1'},
+	{.name = "ctproto",   .has_arg = true, .val = '2'},
+	{.name = "ctorigsrc", .has_arg = true, .val = '3'},
+	{.name = "ctorigdst", .has_arg = true, .val = '4'},
+	{.name = "ctreplsrc", .has_arg = true, .val = '5'},
+	{.name = "ctrepldst", .has_arg = true, .val = '6'},
+	{.name = "ctstatus",  .has_arg = true, .val = '7'},
+	{.name = "ctexpire",  .has_arg = true, .val = '8'},
+	{ .name = NULL }
+};
+
+static const struct option conntrack_mt_opts[] = {
+	{.name = "ctstate",       .has_arg = true, .val = '1'},
+	{.name = "ctproto",       .has_arg = true, .val = '2'},
+	{.name = "ctorigsrc",     .has_arg = true, .val = '3'},
+	{.name = "ctorigdst",     .has_arg = true, .val = '4'},
+	{.name = "ctreplsrc",     .has_arg = true, .val = '5'},
+	{.name = "ctrepldst",     .has_arg = true, .val = '6'},
+	{.name = "ctstatus",      .has_arg = true, .val = '7'},
+	{.name = "ctexpire",      .has_arg = true, .val = '8'},
+	{.name = "ctorigsrcport", .has_arg = true, .val = 'a'},
+	{.name = "ctorigdstport", .has_arg = true, .val = 'b'},
+	{.name = "ctreplsrcport", .has_arg = true, .val = 'c'},
+	{.name = "ctrepldstport", .has_arg = true, .val = 'd'},
+	{.name = "ctdir",         .has_arg = true, .val = 'e'},
+	{.name = NULL},
+};
+
+static int
+parse_state(const char *state, size_t len, struct xt_conntrack_info *sinfo)
+{
+	if (strncasecmp(state, "INVALID", len) == 0)
+		sinfo->statemask |= XT_CONNTRACK_STATE_INVALID;
+	else if (strncasecmp(state, "NEW", len) == 0)
+		sinfo->statemask |= XT_CONNTRACK_STATE_BIT(IP_CT_NEW);
+	else if (strncasecmp(state, "ESTABLISHED", len) == 0)
+		sinfo->statemask |= XT_CONNTRACK_STATE_BIT(IP_CT_ESTABLISHED);
+	else if (strncasecmp(state, "RELATED", len) == 0)
+		sinfo->statemask |= XT_CONNTRACK_STATE_BIT(IP_CT_RELATED);
+	else if (strncasecmp(state, "UNTRACKED", len) == 0)
+		sinfo->statemask |= XT_CONNTRACK_STATE_UNTRACKED;
+	else if (strncasecmp(state, "SNAT", len) == 0)
+		sinfo->statemask |= XT_CONNTRACK_STATE_SNAT;
+	else if (strncasecmp(state, "DNAT", len) == 0)
+		sinfo->statemask |= XT_CONNTRACK_STATE_DNAT;
+	else
+		return 0;
+	return 1;
+}
+
+static void
+parse_states(const char *arg, struct xt_conntrack_info *sinfo)
+{
+	const char *comma;
+
+	while ((comma = strchr(arg, ',')) != NULL) {
+		if (comma == arg || !parse_state(arg, comma-arg, sinfo))
+			xtables_error(PARAMETER_PROBLEM, "Bad ctstate \"%s\"", arg);
+		arg = comma+1;
+	}
+	if (!*arg)
+		xtables_error(PARAMETER_PROBLEM, "\"--ctstate\" requires a list of "
+					      "states with no spaces, e.g. "
+					      "ESTABLISHED,RELATED");
+	if (strlen(arg) == 0 || !parse_state(arg, strlen(arg), sinfo))
+		xtables_error(PARAMETER_PROBLEM, "Bad ctstate \"%s\"", arg);
+}
+
+static bool
+conntrack_ps_state(struct xt_conntrack_mtinfo2 *info, const char *state,
+                   size_t z)
+{
+	if (strncasecmp(state, "INVALID", z) == 0)
+		info->state_mask |= XT_CONNTRACK_STATE_INVALID;
+	else if (strncasecmp(state, "NEW", z) == 0)
+		info->state_mask |= XT_CONNTRACK_STATE_BIT(IP_CT_NEW);
+	else if (strncasecmp(state, "ESTABLISHED", z) == 0)
+		info->state_mask |= XT_CONNTRACK_STATE_BIT(IP_CT_ESTABLISHED);
+	else if (strncasecmp(state, "RELATED", z) == 0)
+		info->state_mask |= XT_CONNTRACK_STATE_BIT(IP_CT_RELATED);
+	else if (strncasecmp(state, "UNTRACKED", z) == 0)
+		info->state_mask |= XT_CONNTRACK_STATE_UNTRACKED;
+	else if (strncasecmp(state, "SNAT", z) == 0)
+		info->state_mask |= XT_CONNTRACK_STATE_SNAT;
+	else if (strncasecmp(state, "DNAT", z) == 0)
+		info->state_mask |= XT_CONNTRACK_STATE_DNAT;
+	else
+		return false;
+	return true;
+}
+
+static void
+conntrack_ps_states(struct xt_conntrack_mtinfo2 *info, const char *arg)
+{
+	const char *comma;
+
+	while ((comma = strchr(arg, ',')) != NULL) {
+		if (comma == arg || !conntrack_ps_state(info, arg, comma - arg))
+			xtables_error(PARAMETER_PROBLEM,
+			           "Bad ctstate \"%s\"", arg);
+		arg = comma + 1;
+	}
+
+	if (strlen(arg) == 0 || !conntrack_ps_state(info, arg, strlen(arg)))
+		xtables_error(PARAMETER_PROBLEM, "Bad ctstate \"%s\"", arg);
+}
+
+static int
+parse_status(const char *status, size_t len, struct xt_conntrack_info *sinfo)
+{
+	if (strncasecmp(status, "NONE", len) == 0)
+		sinfo->statusmask |= 0;
+	else if (strncasecmp(status, "EXPECTED", len) == 0)
+		sinfo->statusmask |= IPS_EXPECTED;
+	else if (strncasecmp(status, "SEEN_REPLY", len) == 0)
+		sinfo->statusmask |= IPS_SEEN_REPLY;
+	else if (strncasecmp(status, "ASSURED", len) == 0)
+		sinfo->statusmask |= IPS_ASSURED;
+#ifdef IPS_CONFIRMED
+	else if (strncasecmp(status, "CONFIRMED", len) == 0)
+		sinfo->statusmask |= IPS_CONFIRMED;
+#endif
+	else
+		return 0;
+	return 1;
+}
+
+static void
+parse_statuses(const char *arg, struct xt_conntrack_info *sinfo)
+{
+	const char *comma;
+
+	while ((comma = strchr(arg, ',')) != NULL) {
+		if (comma == arg || !parse_status(arg, comma-arg, sinfo))
+			xtables_error(PARAMETER_PROBLEM, "Bad ctstatus \"%s\"", arg);
+		arg = comma+1;
+	}
+
+	if (strlen(arg) == 0 || !parse_status(arg, strlen(arg), sinfo))
+		xtables_error(PARAMETER_PROBLEM, "Bad ctstatus \"%s\"", arg);
+}
+
+static bool
+conntrack_ps_status(struct xt_conntrack_mtinfo2 *info, const char *status,
+                    size_t z)
+{
+	if (strncasecmp(status, "NONE", z) == 0)
+		info->status_mask |= 0;
+	else if (strncasecmp(status, "EXPECTED", z) == 0)
+		info->status_mask |= IPS_EXPECTED;
+	else if (strncasecmp(status, "SEEN_REPLY", z) == 0)
+		info->status_mask |= IPS_SEEN_REPLY;
+	else if (strncasecmp(status, "ASSURED", z) == 0)
+		info->status_mask |= IPS_ASSURED;
+	else if (strncasecmp(status, "CONFIRMED", z) == 0)
+		info->status_mask |= IPS_CONFIRMED;
+	else
+		return false;
+	return true;
+}
+
+static void
+conntrack_ps_statuses(struct xt_conntrack_mtinfo2 *info, const char *arg)
+{
+	const char *comma;
+
+	while ((comma = strchr(arg, ',')) != NULL) {
+		if (comma == arg || !conntrack_ps_status(info, arg, comma - arg))
+			xtables_error(PARAMETER_PROBLEM,
+			           "Bad ctstatus \"%s\"", arg);
+		arg = comma + 1;
+	}
+
+	if (strlen(arg) == 0 || !conntrack_ps_status(info, arg, strlen(arg)))
+		xtables_error(PARAMETER_PROBLEM, "Bad ctstatus \"%s\"", arg);
+}
+
+static unsigned long
+parse_expire(const char *s)
+{
+	unsigned int len;
+
+	if (!xtables_strtoui(s, NULL, &len, 0, UINT32_MAX))
+		xtables_error(PARAMETER_PROBLEM, "expire value invalid: \"%s\"\n", s);
+	else
+		return len;
+}
+
+/* If a single value is provided, min and max are both set to the value */
+static void
+parse_expires(const char *s, struct xt_conntrack_info *sinfo)
+{
+	char *buffer;
+	char *cp;
+
+	buffer = strdup(s);
+	if ((cp = strchr(buffer, ':')) == NULL)
+		sinfo->expires_min = sinfo->expires_max =
+			parse_expire(buffer);
+	else {
+		*cp = '\0';
+		cp++;
+
+		sinfo->expires_min = buffer[0] ? parse_expire(buffer) : 0;
+		sinfo->expires_max = cp[0]
+			? parse_expire(cp)
+			: (unsigned long)-1;
+	}
+	free(buffer);
+
+	if (sinfo->expires_min > sinfo->expires_max)
+		xtables_error(PARAMETER_PROBLEM,
+		           "expire min. range value `%lu' greater than max. "
+		           "range value `%lu'", sinfo->expires_min, sinfo->expires_max);
+}
+
+static void
+conntrack_ps_expires(struct xt_conntrack_mtinfo2 *info, const char *s)
+{
+	unsigned int min, max;
+	char *end;
+
+	if (!xtables_strtoui(s, &end, &min, 0, UINT32_MAX))
+		xtables_param_act(XTF_BAD_VALUE, "conntrack", "--expires", s);
+	max = min;
+	if (*end == ':')
+		if (!xtables_strtoui(end + 1, &end, &max, 0, UINT32_MAX))
+			xtables_param_act(XTF_BAD_VALUE, "conntrack", "--expires", s);
+	if (*end != '\0')
+		xtables_param_act(XTF_BAD_VALUE, "conntrack", "--expires", s);
+
+	if (min > max)
+		xtables_error(PARAMETER_PROBLEM,
+		           "expire min. range value \"%u\" greater than max. "
+		           "range value \"%u\"", min, max);
+
+	info->expires_min = min;
+	info->expires_max = max;
+}
+
+static int conntrack_parse(int c, char **argv, int invert, unsigned int *flags,
+                           const void *entry, struct xt_entry_match **match)
+{
+	struct xt_conntrack_info *sinfo = (void *)(*match)->data;
+	char *protocol = NULL;
+	unsigned int naddrs = 0;
+	struct in_addr *addrs = NULL;
+
+
+	switch (c) {
+	case '1':
+		xtables_check_inverse(optarg, &invert, &optind, 0, argv);
+
+		parse_states(optarg, sinfo);
+		if (invert) {
+			sinfo->invflags |= XT_CONNTRACK_STATE;
+		}
+		sinfo->flags |= XT_CONNTRACK_STATE;
+		break;
+
+	case '2':
+		xtables_check_inverse(optarg, &invert, &optind, 0, argv);
+
+		if(invert)
+			sinfo->invflags |= XT_CONNTRACK_PROTO;
+
+		/* Canonicalize into lower case */
+		for (protocol = optarg; *protocol; protocol++)
+			*protocol = tolower(*protocol);
+
+		protocol = optarg;
+		sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum =
+			xtables_parse_protocol(protocol);
+
+		if (sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum == 0
+		    && (sinfo->invflags & XT_INV_PROTO))
+			xtables_error(PARAMETER_PROBLEM,
+				   "rule would never match protocol");
+
+		sinfo->flags |= XT_CONNTRACK_PROTO;
+		break;
+
+	case '3':
+		xtables_check_inverse(optarg, &invert, &optind, 0, argv);
+
+		if (invert)
+			sinfo->invflags |= XT_CONNTRACK_ORIGSRC;
+
+		xtables_ipparse_any(optarg, &addrs,
+					&sinfo->sipmsk[IP_CT_DIR_ORIGINAL],
+					&naddrs);
+		if(naddrs > 1)
+			xtables_error(PARAMETER_PROBLEM,
+				"multiple IP addresses not allowed");
+
+		if(naddrs == 1) {
+			sinfo->tuple[IP_CT_DIR_ORIGINAL].src.ip = addrs[0].s_addr;
+		}
+
+		sinfo->flags |= XT_CONNTRACK_ORIGSRC;
+		break;
+
+	case '4':
+		xtables_check_inverse(optarg, &invert, &optind, 0, argv);
+
+		if (invert)
+			sinfo->invflags |= XT_CONNTRACK_ORIGDST;
+
+		xtables_ipparse_any(optarg, &addrs,
+					&sinfo->dipmsk[IP_CT_DIR_ORIGINAL],
+					&naddrs);
+		if(naddrs > 1)
+			xtables_error(PARAMETER_PROBLEM,
+				"multiple IP addresses not allowed");
+
+		if(naddrs == 1) {
+			sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.ip = addrs[0].s_addr;
+		}
+
+		sinfo->flags |= XT_CONNTRACK_ORIGDST;
+		break;
+
+	case '5':
+		xtables_check_inverse(optarg, &invert, &optind, 0, argv);
+
+		if (invert)
+			sinfo->invflags |= XT_CONNTRACK_REPLSRC;
+
+		xtables_ipparse_any(optarg, &addrs,
+					&sinfo->sipmsk[IP_CT_DIR_REPLY],
+					&naddrs);
+		if(naddrs > 1)
+			xtables_error(PARAMETER_PROBLEM,
+				"multiple IP addresses not allowed");
+
+		if(naddrs == 1) {
+			sinfo->tuple[IP_CT_DIR_REPLY].src.ip = addrs[0].s_addr;
+		}
+
+		sinfo->flags |= XT_CONNTRACK_REPLSRC;
+		break;
+
+	case '6':
+		xtables_check_inverse(optarg, &invert, &optind, 0, argv);
+
+		if (invert)
+			sinfo->invflags |= XT_CONNTRACK_REPLDST;
+
+		xtables_ipparse_any(optarg, &addrs,
+					&sinfo->dipmsk[IP_CT_DIR_REPLY],
+					&naddrs);
+		if(naddrs > 1)
+			xtables_error(PARAMETER_PROBLEM,
+				"multiple IP addresses not allowed");
+
+		if(naddrs == 1) {
+			sinfo->tuple[IP_CT_DIR_REPLY].dst.ip = addrs[0].s_addr;
+		}
+
+		sinfo->flags |= XT_CONNTRACK_REPLDST;
+		break;
+
+	case '7':
+		xtables_check_inverse(optarg, &invert, &optind, 0, argv);
+
+		parse_statuses(optarg, sinfo);
+		if (invert) {
+			sinfo->invflags |= XT_CONNTRACK_STATUS;
+		}
+		sinfo->flags |= XT_CONNTRACK_STATUS;
+		break;
+
+	case '8':
+		xtables_check_inverse(optarg, &invert, &optind, 0, argv);
+
+		parse_expires(optarg, sinfo);
+		if (invert) {
+			sinfo->invflags |= XT_CONNTRACK_EXPIRES;
+		}
+		sinfo->flags |= XT_CONNTRACK_EXPIRES;
+		break;
+
+	default:
+		return 0;
+	}
+
+	*flags = sinfo->flags;
+	return 1;
+}
+
+static int
+conntrack_mt_parse(int c, bool invert, unsigned int *flags,
+                   struct xt_conntrack_mtinfo2 *info)
+{
+	unsigned int port;
+	char *p;
+
+	switch (c) {
+	case '1': /* --ctstate */
+		conntrack_ps_states(info, optarg);
+		info->match_flags |= XT_CONNTRACK_STATE;
+		if (invert)
+			info->invert_flags |= XT_CONNTRACK_STATE;
+		break;
+
+	case '2': /* --ctproto */
+		/* Canonicalize into lower case */
+		for (p = optarg; *p != '\0'; ++p)
+			*p = tolower(*p);
+		info->l4proto = xtables_parse_protocol(optarg);
+
+		if (info->l4proto == 0 && (info->invert_flags & XT_INV_PROTO))
+			xtables_error(PARAMETER_PROBLEM, "conntrack: rule would "
+			           "never match protocol");
+
+		info->match_flags |= XT_CONNTRACK_PROTO;
+		if (invert)
+			info->invert_flags |= XT_CONNTRACK_PROTO;
+		break;
+
+	case '7': /* --ctstatus */
+		conntrack_ps_statuses(info, optarg);
+		info->match_flags |= XT_CONNTRACK_STATUS;
+		if (invert)
+			info->invert_flags |= XT_CONNTRACK_STATUS;
+		break;
+
+	case '8': /* --ctexpire */
+		conntrack_ps_expires(info, optarg);
+		info->match_flags |= XT_CONNTRACK_EXPIRES;
+		if (invert)
+			info->invert_flags |= XT_CONNTRACK_EXPIRES;
+		break;
+
+	case 'a': /* --ctorigsrcport */
+		if (!xtables_strtoui(optarg, NULL, &port, 0, UINT16_MAX))
+			xtables_param_act(XTF_BAD_VALUE, "conntrack",
+			          "--ctorigsrcport", optarg);
+		info->match_flags |= XT_CONNTRACK_ORIGSRC_PORT;
+		info->origsrc_port = htons(port);
+		if (invert)
+			info->invert_flags |= XT_CONNTRACK_ORIGSRC_PORT;
+		break;
+
+	case 'b': /* --ctorigdstport */
+		if (!xtables_strtoui(optarg, NULL, &port, 0, UINT16_MAX))
+			xtables_param_act(XTF_BAD_VALUE, "conntrack",
+			          "--ctorigdstport", optarg);
+		info->match_flags |= XT_CONNTRACK_ORIGDST_PORT;
+		info->origdst_port = htons(port);
+		if (invert)
+			info->invert_flags |= XT_CONNTRACK_ORIGDST_PORT;
+		break;
+
+	case 'c': /* --ctreplsrcport */
+		if (!xtables_strtoui(optarg, NULL, &port, 0, UINT16_MAX))
+			xtables_param_act(XTF_BAD_VALUE, "conntrack",
+			          "--ctreplsrcport", optarg);
+		info->match_flags |= XT_CONNTRACK_REPLSRC_PORT;
+		info->replsrc_port = htons(port);
+		if (invert)
+			info->invert_flags |= XT_CONNTRACK_REPLSRC_PORT;
+		break;
+
+	case 'd': /* --ctrepldstport */
+		if (!xtables_strtoui(optarg, NULL, &port, 0, UINT16_MAX))
+			xtables_param_act(XTF_BAD_VALUE, "conntrack",
+			          "--ctrepldstport", optarg);
+		info->match_flags |= XT_CONNTRACK_REPLDST_PORT;
+		info->repldst_port = htons(port);
+		if (invert)
+			info->invert_flags |= XT_CONNTRACK_REPLDST_PORT;
+		break;
+
+	case 'e': /* --ctdir */
+		xtables_param_act(XTF_NO_INVERT, "conntrack", "--ctdir", invert);
+		if (strcasecmp(optarg, "ORIGINAL") == 0) {
+			info->match_flags  |= XT_CONNTRACK_DIRECTION;
+			info->invert_flags &= ~XT_CONNTRACK_DIRECTION;
+		} else if (strcasecmp(optarg, "REPLY") == 0) {
+			info->match_flags  |= XT_CONNTRACK_DIRECTION;
+			info->invert_flags |= XT_CONNTRACK_DIRECTION;
+		} else {
+			xtables_param_act(XTF_BAD_VALUE, "conntrack", "--ctdir", optarg);
+		}
+		break;
+
+	default:
+		return false;
+	}
+
+	*flags = info->match_flags;
+	return true;
+}
+
+static int
+conntrack_mt4_parse(int c, bool invert, unsigned int *flags,
+                    struct xt_conntrack_mtinfo2 *info)
+{
+	struct in_addr *addr = NULL;
+	unsigned int naddrs = 0;
+
+	switch (c) {
+	case '3': /* --ctorigsrc */
+		xtables_ipparse_any(optarg, &addr, &info->origsrc_mask.in,
+		                        &naddrs);
+		if (naddrs > 1)
+			xtables_error(PARAMETER_PROBLEM,
+			           "multiple IP addresses not allowed");
+		if (naddrs == 1)
+			memcpy(&info->origsrc_addr.in, addr, sizeof(*addr));
+		info->match_flags |= XT_CONNTRACK_ORIGSRC;
+		if (invert)
+			info->invert_flags |= XT_CONNTRACK_ORIGSRC;
+		break;
+
+	case '4': /* --ctorigdst */
+		xtables_ipparse_any(optarg, &addr, &info->origdst_mask.in,
+		                        &naddrs);
+		if (naddrs > 1)
+			xtables_error(PARAMETER_PROBLEM,
+			           "multiple IP addresses not allowed");
+		if (naddrs == 1)
+			memcpy(&info->origdst_addr.in, addr, sizeof(*addr));
+		info->match_flags |= XT_CONNTRACK_ORIGDST;
+		if (invert)
+			info->invert_flags |= XT_CONNTRACK_ORIGDST;
+		break;
+
+	case '5': /* --ctreplsrc */
+		xtables_ipparse_any(optarg, &addr, &info->replsrc_mask.in,
+		                        &naddrs);
+		if (naddrs > 1)
+			xtables_error(PARAMETER_PROBLEM,
+			           "multiple IP addresses not allowed");
+		if (naddrs == 1)
+			memcpy(&info->replsrc_addr.in, addr, sizeof(*addr));
+		info->match_flags |= XT_CONNTRACK_REPLSRC;
+		if (invert)
+			info->invert_flags |= XT_CONNTRACK_REPLSRC;
+		break;
+
+	case '6': /* --ctrepldst */
+		xtables_ipparse_any(optarg, &addr, &info->repldst_mask.in,
+		                        &naddrs);
+		if (naddrs > 1)
+			xtables_error(PARAMETER_PROBLEM,
+			           "multiple IP addresses not allowed");
+		if (naddrs == 1)
+			memcpy(&info->repldst_addr.in, addr, sizeof(*addr));
+		info->match_flags |= XT_CONNTRACK_REPLDST;
+		if (invert)
+			info->invert_flags |= XT_CONNTRACK_REPLDST;
+		break;
+
+
+	default:
+		return conntrack_mt_parse(c, invert, flags, info);
+	}
+
+	*flags = info->match_flags;
+	return true;
+}
+
+static int
+conntrack_mt6_parse(int c, bool invert, unsigned int *flags,
+                    struct xt_conntrack_mtinfo2 *info)
+{
+	struct in6_addr *addr = NULL;
+	unsigned int naddrs = 0;
+
+	switch (c) {
+	case '3': /* --ctorigsrc */
+		xtables_ip6parse_any(optarg, &addr,
+		                         &info->origsrc_mask.in6, &naddrs);
+		if (naddrs > 1)
+			xtables_error(PARAMETER_PROBLEM,
+			           "multiple IP addresses not allowed");
+		if (naddrs == 1)
+			memcpy(&info->origsrc_addr.in6, addr, sizeof(*addr));
+		info->match_flags |= XT_CONNTRACK_ORIGSRC;
+		if (invert)
+			info->invert_flags |= XT_CONNTRACK_ORIGSRC;
+		break;
+
+	case '4': /* --ctorigdst */
+		xtables_ip6parse_any(optarg, &addr,
+		                         &info->origdst_mask.in6, &naddrs);
+		if (naddrs > 1)
+			xtables_error(PARAMETER_PROBLEM,
+			           "multiple IP addresses not allowed");
+		if (naddrs == 1)
+			memcpy(&info->origdst_addr.in, addr, sizeof(*addr));
+		info->match_flags |= XT_CONNTRACK_ORIGDST;
+		if (invert)
+			info->invert_flags |= XT_CONNTRACK_ORIGDST;
+		break;
+
+	case '5': /* --ctreplsrc */
+		xtables_ip6parse_any(optarg, &addr,
+		                         &info->replsrc_mask.in6, &naddrs);
+		if (naddrs > 1)
+			xtables_error(PARAMETER_PROBLEM,
+			           "multiple IP addresses not allowed");
+		if (naddrs == 1)
+			memcpy(&info->replsrc_addr.in, addr, sizeof(*addr));
+		info->match_flags |= XT_CONNTRACK_REPLSRC;
+		if (invert)
+			info->invert_flags |= XT_CONNTRACK_REPLSRC;
+		break;
+
+	case '6': /* --ctrepldst */
+		xtables_ip6parse_any(optarg, &addr,
+		                         &info->repldst_mask.in6, &naddrs);
+		if (naddrs > 1)
+			xtables_error(PARAMETER_PROBLEM,
+			           "multiple IP addresses not allowed");
+		if (naddrs == 1)
+			memcpy(&info->repldst_addr.in, addr, sizeof(*addr));
+		info->match_flags |= XT_CONNTRACK_REPLDST;
+		if (invert)
+			info->invert_flags |= XT_CONNTRACK_REPLDST;
+		break;
+
+
+	default:
+		return conntrack_mt_parse(c, invert, flags, info);
+	}
+
+	*flags = info->match_flags;
+	return true;
+}
+
+#define cinfo_transform(r, l) \
+	do { \
+		memcpy((r), (l), offsetof(typeof(*(l)), state_mask)); \
+		(r)->state_mask  = (l)->state_mask; \
+		(r)->status_mask = (l)->status_mask; \
+	} while (false);
+
+static int
+conntrack1_mt4_parse(int c, char **argv, int invert, unsigned int *flags,
+                     const void *entry, struct xt_entry_match **match)
+{
+	struct xt_conntrack_mtinfo1 *info = (void *)(*match)->data;
+	struct xt_conntrack_mtinfo2 up;
+
+	cinfo_transform(&up, info);
+	if (!conntrack_mt4_parse(c, invert, flags, &up))
+		return false;
+	cinfo_transform(info, &up);
+	return true;
+}
+
+static int
+conntrack1_mt6_parse(int c, char **argv, int invert, unsigned int *flags,
+                     const void *entry, struct xt_entry_match **match)
+{
+	struct xt_conntrack_mtinfo1 *info = (void *)(*match)->data;
+	struct xt_conntrack_mtinfo2 up;
+
+	cinfo_transform(&up, info);
+	if (!conntrack_mt6_parse(c, invert, flags, &up))
+		return false;
+	cinfo_transform(info, &up);
+	return true;
+}
+
+static int
+conntrack2_mt4_parse(int c, char **argv, int invert, unsigned int *flags,
+                     const void *entry, struct xt_entry_match **match)
+{
+	return conntrack_mt4_parse(c, invert, flags, (void *)(*match)->data);
+}
+
+static int
+conntrack2_mt6_parse(int c, char **argv, int invert, unsigned int *flags,
+                     const void *entry, struct xt_entry_match **match)
+{
+	return conntrack_mt6_parse(c, invert, flags, (void *)(*match)->data);
+}
+
+static void conntrack_mt_check(unsigned int flags)
+{
+	if (flags == 0)
+		xtables_error(PARAMETER_PROBLEM, "conntrack: At least one option "
+		           "is required");
+}
+
+static void
+print_state(unsigned int statemask)
+{
+	const char *sep = "";
+
+	if (statemask & XT_CONNTRACK_STATE_INVALID) {
+		printf("%sINVALID", sep);
+		sep = ",";
+	}
+	if (statemask & XT_CONNTRACK_STATE_BIT(IP_CT_NEW)) {
+		printf("%sNEW", sep);
+		sep = ",";
+	}
+	if (statemask & XT_CONNTRACK_STATE_BIT(IP_CT_RELATED)) {
+		printf("%sRELATED", sep);
+		sep = ",";
+	}
+	if (statemask & XT_CONNTRACK_STATE_BIT(IP_CT_ESTABLISHED)) {
+		printf("%sESTABLISHED", sep);
+		sep = ",";
+	}
+	if (statemask & XT_CONNTRACK_STATE_UNTRACKED) {
+		printf("%sUNTRACKED", sep);
+		sep = ",";
+	}
+	if (statemask & XT_CONNTRACK_STATE_SNAT) {
+		printf("%sSNAT", sep);
+		sep = ",";
+	}
+	if (statemask & XT_CONNTRACK_STATE_DNAT) {
+		printf("%sDNAT", sep);
+		sep = ",";
+	}
+	printf(" ");
+}
+
+static void
+print_status(unsigned int statusmask)
+{
+	const char *sep = "";
+
+	if (statusmask & IPS_EXPECTED) {
+		printf("%sEXPECTED", sep);
+		sep = ",";
+	}
+	if (statusmask & IPS_SEEN_REPLY) {
+		printf("%sSEEN_REPLY", sep);
+		sep = ",";
+	}
+	if (statusmask & IPS_ASSURED) {
+		printf("%sASSURED", sep);
+		sep = ",";
+	}
+	if (statusmask & IPS_CONFIRMED) {
+		printf("%sCONFIRMED", sep);
+		sep = ",";
+	}
+	if (statusmask == 0)
+		printf("%sNONE", sep);
+	printf(" ");
+}
+
+static void
+conntrack_dump_addr(const union nf_inet_addr *addr,
+                    const union nf_inet_addr *mask,
+                    unsigned int family, bool numeric)
+{
+	if (family == NFPROTO_IPV4) {
+		if (!numeric && addr->ip == 0) {
+			printf("anywhere ");
+			return;
+		}
+		if (numeric)
+			printf("%s%s ",
+			       xtables_ipaddr_to_numeric(&addr->in),
+			       xtables_ipmask_to_numeric(&mask->in));
+		else
+			printf("%s%s ",
+			       xtables_ipaddr_to_anyname(&addr->in),
+			       xtables_ipmask_to_numeric(&mask->in));
+	} else if (family == NFPROTO_IPV6) {
+		if (!numeric && addr->ip6[0] == 0 && addr->ip6[1] == 0 &&
+		    addr->ip6[2] == 0 && addr->ip6[3] == 0) {
+			printf("anywhere ");
+			return;
+		}
+		if (numeric)
+			printf("%s%s ",
+			       xtables_ip6addr_to_numeric(&addr->in6),
+			       xtables_ip6mask_to_numeric(&mask->in6));
+		else
+			printf("%s%s ",
+			       xtables_ip6addr_to_anyname(&addr->in6),
+			       xtables_ip6mask_to_numeric(&mask->in6));
+	}
+}
+
+static void
+print_addr(const struct in_addr *addr, const struct in_addr *mask,
+           int inv, int numeric)
+{
+	char buf[BUFSIZ];
+
+	if (inv)
+	       	printf("! ");
+
+	if (mask->s_addr == 0L && !numeric)
+		printf("%s ", "anywhere");
+	else {
+		if (numeric)
+			strcpy(buf, xtables_ipaddr_to_numeric(addr));
+		else
+			strcpy(buf, xtables_ipaddr_to_anyname(addr));
+		strcat(buf, xtables_ipmask_to_numeric(mask));
+		printf("%s ", buf);
+	}
+}
+
+static void
+matchinfo_print(const void *ip, const struct xt_entry_match *match, int numeric, const char *optpfx)
+{
+	const struct xt_conntrack_info *sinfo = (const void *)match->data;
+
+	if(sinfo->flags & XT_CONNTRACK_STATE) {
+        	if (sinfo->invflags & XT_CONNTRACK_STATE)
+                	printf("! ");
+		printf("%sctstate ", optpfx);
+		print_state(sinfo->statemask);
+	}
+
+	if(sinfo->flags & XT_CONNTRACK_PROTO) {
+        	if (sinfo->invflags & XT_CONNTRACK_PROTO)
+                	printf("! ");
+		printf("%sctproto ", optpfx);
+		printf("%u ", sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum);
+	}
+
+	if(sinfo->flags & XT_CONNTRACK_ORIGSRC) {
+		if (sinfo->invflags & XT_CONNTRACK_ORIGSRC)
+			printf("! ");
+		printf("%sctorigsrc ", optpfx);
+
+		print_addr(
+		    (struct in_addr *)&sinfo->tuple[IP_CT_DIR_ORIGINAL].src.ip,
+		    &sinfo->sipmsk[IP_CT_DIR_ORIGINAL],
+		    false,
+		    numeric);
+	}
+
+	if(sinfo->flags & XT_CONNTRACK_ORIGDST) {
+		if (sinfo->invflags & XT_CONNTRACK_ORIGDST)
+			printf("! ");
+		printf("%sctorigdst ", optpfx);
+
+		print_addr(
+		    (struct in_addr *)&sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.ip,
+		    &sinfo->dipmsk[IP_CT_DIR_ORIGINAL],
+		    false,
+		    numeric);
+	}
+
+	if(sinfo->flags & XT_CONNTRACK_REPLSRC) {
+		if (sinfo->invflags & XT_CONNTRACK_REPLSRC)
+			printf("! ");
+		printf("%sctreplsrc ", optpfx);
+
+		print_addr(
+		    (struct in_addr *)&sinfo->tuple[IP_CT_DIR_REPLY].src.ip,
+		    &sinfo->sipmsk[IP_CT_DIR_REPLY],
+		    false,
+		    numeric);
+	}
+
+	if(sinfo->flags & XT_CONNTRACK_REPLDST) {
+		if (sinfo->invflags & XT_CONNTRACK_REPLDST)
+			printf("! ");
+		printf("%sctrepldst ", optpfx);
+
+		print_addr(
+		    (struct in_addr *)&sinfo->tuple[IP_CT_DIR_REPLY].dst.ip,
+		    &sinfo->dipmsk[IP_CT_DIR_REPLY],
+		    false,
+		    numeric);
+	}
+
+	if(sinfo->flags & XT_CONNTRACK_STATUS) {
+        	if (sinfo->invflags & XT_CONNTRACK_STATUS)
+                	printf("! ");
+		printf("%sctstatus ", optpfx);
+		print_status(sinfo->statusmask);
+	}
+
+	if(sinfo->flags & XT_CONNTRACK_EXPIRES) {
+        	if (sinfo->invflags & XT_CONNTRACK_EXPIRES)
+                	printf("! ");
+		printf("%sctexpire ", optpfx);
+
+        	if (sinfo->expires_max == sinfo->expires_min)
+                	printf("%lu ", sinfo->expires_min);
+        	else
+                	printf("%lu:%lu ", sinfo->expires_min, sinfo->expires_max);
+	}
+
+	if (sinfo->flags & XT_CONNTRACK_DIRECTION) {
+		if (sinfo->invflags & XT_CONNTRACK_DIRECTION)
+			printf("%sctdir REPLY", optpfx);
+		else
+			printf("%sctdir ORIGINAL", optpfx);
+	}
+
+}
+
+static void
+conntrack_dump(const struct xt_conntrack_mtinfo2 *info, const char *prefix,
+               unsigned int family, bool numeric)
+{
+	if (info->match_flags & XT_CONNTRACK_STATE) {
+		if (info->invert_flags & XT_CONNTRACK_STATE)
+			printf("! ");
+		printf("%sctstate ", prefix);
+		print_state(info->state_mask);
+	}
+
+	if (info->match_flags & XT_CONNTRACK_PROTO) {
+		if (info->invert_flags & XT_CONNTRACK_PROTO)
+			printf("! ");
+		printf("%sctproto %u ", prefix, info->l4proto);
+	}
+
+	if (info->match_flags & XT_CONNTRACK_ORIGSRC) {
+		if (info->invert_flags & XT_CONNTRACK_ORIGSRC)
+			printf("! ");
+		printf("%sctorigsrc ", prefix);
+		conntrack_dump_addr(&info->origsrc_addr, &info->origsrc_mask,
+		                    family, numeric);
+	}
+
+	if (info->match_flags & XT_CONNTRACK_ORIGDST) {
+		if (info->invert_flags & XT_CONNTRACK_ORIGDST)
+			printf("! ");
+		printf("%sctorigdst ", prefix);
+		conntrack_dump_addr(&info->origdst_addr, &info->origdst_mask,
+		                    family, numeric);
+	}
+
+	if (info->match_flags & XT_CONNTRACK_REPLSRC) {
+		if (info->invert_flags & XT_CONNTRACK_REPLSRC)
+			printf("! ");
+		printf("%sctreplsrc ", prefix);
+		conntrack_dump_addr(&info->replsrc_addr, &info->replsrc_mask,
+		                    family, numeric);
+	}
+
+	if (info->match_flags & XT_CONNTRACK_REPLDST) {
+		if (info->invert_flags & XT_CONNTRACK_REPLDST)
+			printf("! ");
+		printf("%sctrepldst ", prefix);
+		conntrack_dump_addr(&info->repldst_addr, &info->repldst_mask,
+		                    family, numeric);
+	}
+
+	if (info->match_flags & XT_CONNTRACK_ORIGSRC_PORT) {
+		if (info->invert_flags & XT_CONNTRACK_ORIGSRC_PORT)
+			printf("! ");
+		printf("%sctorigsrcport %u ", prefix,
+		       ntohs(info->origsrc_port));
+	}
+
+	if (info->match_flags & XT_CONNTRACK_ORIGDST_PORT) {
+		if (info->invert_flags & XT_CONNTRACK_ORIGDST_PORT)
+			printf("! ");
+		printf("%sctorigdstport %u ", prefix,
+		       ntohs(info->origdst_port));
+	}
+
+	if (info->match_flags & XT_CONNTRACK_REPLSRC_PORT) {
+		if (info->invert_flags & XT_CONNTRACK_REPLSRC_PORT)
+			printf("! ");
+		printf("%sctreplsrcport %u ", prefix,
+		       ntohs(info->replsrc_port));
+	}
+
+	if (info->match_flags & XT_CONNTRACK_REPLDST_PORT) {
+		if (info->invert_flags & XT_CONNTRACK_REPLDST_PORT)
+			printf("! ");
+		printf("%sctrepldstport %u ", prefix,
+		       ntohs(info->repldst_port));
+	}
+
+	if (info->match_flags & XT_CONNTRACK_STATUS) {
+		if (info->invert_flags & XT_CONNTRACK_STATUS)
+			printf("! ");
+		printf("%sctstatus ", prefix);
+		print_status(info->status_mask);
+	}
+
+	if (info->match_flags & XT_CONNTRACK_EXPIRES) {
+		if (info->invert_flags & XT_CONNTRACK_EXPIRES)
+			printf("! ");
+		printf("%sctexpire ", prefix);
+
+		if (info->expires_max == info->expires_min)
+			printf("%u ", (unsigned int)info->expires_min);
+		else
+			printf("%u:%u ", (unsigned int)info->expires_min,
+			       (unsigned int)info->expires_max);
+	}
+
+	if (info->match_flags & XT_CONNTRACK_DIRECTION) {
+		if (info->invert_flags & XT_CONNTRACK_DIRECTION)
+			printf("%sctdir REPLY", prefix);
+		else
+			printf("%sctdir ORIGINAL", prefix);
+	}
+}
+
+static void conntrack_print(const void *ip, const struct xt_entry_match *match,
+                            int numeric)
+{
+	matchinfo_print(ip, match, numeric, "");
+}
+
+static void
+conntrack1_mt4_print(const void *ip, const struct xt_entry_match *match,
+                     int numeric)
+{
+	const struct xt_conntrack_mtinfo1 *info = (void *)match->data;
+	struct xt_conntrack_mtinfo2 up;
+
+	cinfo_transform(&up, info);
+	conntrack_dump(&up, "", NFPROTO_IPV4, numeric);
+}
+
+static void
+conntrack1_mt6_print(const void *ip, const struct xt_entry_match *match,
+                     int numeric)
+{
+	const struct xt_conntrack_mtinfo1 *info = (void *)match->data;
+	struct xt_conntrack_mtinfo2 up;
+
+	cinfo_transform(&up, info);
+	conntrack_dump(&up, "", NFPROTO_IPV6, numeric);
+}
+
+static void
+conntrack_mt_print(const void *ip, const struct xt_entry_match *match,
+                   int numeric)
+{
+	conntrack_dump((const void *)match->data, "", NFPROTO_IPV4, numeric);
+}
+
+static void
+conntrack_mt6_print(const void *ip, const struct xt_entry_match *match,
+                    int numeric)
+{
+	conntrack_dump((const void *)match->data, "", NFPROTO_IPV6, numeric);
+}
+
+static void conntrack_save(const void *ip, const struct xt_entry_match *match)
+{
+	matchinfo_print(ip, match, 1, "--");
+}
+
+static void conntrack_mt_save(const void *ip,
+                              const struct xt_entry_match *match)
+{
+	conntrack_dump((const void *)match->data, "--", NFPROTO_IPV4, true);
+}
+
+static void conntrack_mt6_save(const void *ip,
+                               const struct xt_entry_match *match)
+{
+	conntrack_dump((const void *)match->data, "--", NFPROTO_IPV6, true);
+}
+
+static void
+conntrack1_mt4_save(const void *ip, const struct xt_entry_match *match)
+{
+	const struct xt_conntrack_mtinfo1 *info = (void *)match->data;
+	struct xt_conntrack_mtinfo2 up;
+
+	cinfo_transform(&up, info);
+	conntrack_dump(&up, "--", NFPROTO_IPV4, true);
+}
+
+static void
+conntrack1_mt6_save(const void *ip, const struct xt_entry_match *match)
+{
+	const struct xt_conntrack_mtinfo1 *info = (void *)match->data;
+	struct xt_conntrack_mtinfo2 up;
+
+	cinfo_transform(&up, info);
+	conntrack_dump(&up, "--", NFPROTO_IPV6, true);
+}
+
+static struct xtables_match conntrack_mt_reg[] = {
+	{
+		.version       = XTABLES_VERSION,
+		.name          = "conntrack",
+		.revision      = 0,
+		.family        = NFPROTO_IPV4,
+		.size          = XT_ALIGN(sizeof(struct xt_conntrack_info)),
+		.userspacesize = XT_ALIGN(sizeof(struct xt_conntrack_info)),
+		.help          = conntrack_mt_help,
+		.parse         = conntrack_parse,
+		.final_check   = conntrack_mt_check,
+		.print         = conntrack_print,
+		.save          = conntrack_save,
+		.extra_opts    = conntrack_mt_opts_v0,
+	},
+	{
+		.version       = XTABLES_VERSION,
+		.name          = "conntrack",
+		.revision      = 1,
+		.family        = NFPROTO_IPV4,
+		.size          = XT_ALIGN(sizeof(struct xt_conntrack_mtinfo1)),
+		.userspacesize = XT_ALIGN(sizeof(struct xt_conntrack_mtinfo1)),
+		.help          = conntrack_mt_help,
+		.parse         = conntrack1_mt4_parse,
+		.final_check   = conntrack_mt_check,
+		.print         = conntrack1_mt4_print,
+		.save          = conntrack1_mt4_save,
+		.extra_opts    = conntrack_mt_opts,
+	},
+	{
+		.version       = XTABLES_VERSION,
+		.name          = "conntrack",
+		.revision      = 1,
+		.family        = NFPROTO_IPV6,
+		.size          = XT_ALIGN(sizeof(struct xt_conntrack_mtinfo1)),
+		.userspacesize = XT_ALIGN(sizeof(struct xt_conntrack_mtinfo1)),
+		.help          = conntrack_mt_help,
+		.parse         = conntrack1_mt6_parse,
+		.final_check   = conntrack_mt_check,
+		.print         = conntrack1_mt6_print,
+		.save          = conntrack1_mt6_save,
+		.extra_opts    = conntrack_mt_opts,
+	},
+	{
+		.version       = XTABLES_VERSION,
+		.name          = "conntrack",
+		.revision      = 2,
+		.family        = NFPROTO_IPV4,
+		.size          = XT_ALIGN(sizeof(struct xt_conntrack_mtinfo2)),
+		.userspacesize = XT_ALIGN(sizeof(struct xt_conntrack_mtinfo2)),
+		.help          = conntrack_mt_help,
+		.parse         = conntrack2_mt4_parse,
+		.final_check   = conntrack_mt_check,
+		.print         = conntrack_mt_print,
+		.save          = conntrack_mt_save,
+		.extra_opts    = conntrack_mt_opts,
+	},
+	{
+		.version       = XTABLES_VERSION,
+		.name          = "conntrack",
+		.revision      = 2,
+		.family        = NFPROTO_IPV6,
+		.size          = XT_ALIGN(sizeof(struct xt_conntrack_mtinfo2)),
+		.userspacesize = XT_ALIGN(sizeof(struct xt_conntrack_mtinfo2)),
+		.help          = conntrack_mt_help,
+		.parse         = conntrack2_mt6_parse,
+		.final_check   = conntrack_mt_check,
+		.print         = conntrack_mt6_print,
+		.save          = conntrack_mt6_save,
+		.extra_opts    = conntrack_mt_opts,
+	},
+};
+
+void _init(void)
+{
+	xtables_register_matches(conntrack_mt_reg, ARRAY_SIZE(conntrack_mt_reg));
+}