Unifies libip[6]t_tcp.c into libxt_tcp.c.

1 files changed, 0 insertions, 416 deletions

diff --git a/extensions/libipt_tcp.c b/extensions/libipt_tcp.c
deleted file mode 100644
index d7885061..00000000
--- a/extensions/libipt_tcp.c
+++ /dev/null
@@ -1,416 +0,0 @@
-/* Shared library add-on to iptables to add TCP support. */
-#include <stdio.h>
-#include <netdb.h>
-#include <string.h>
-#include <stdlib.h>
-#include <getopt.h>
-#include <iptables.h>
-#include <linux/netfilter_ipv4/ip_tables.h>
-
-/* Function which prints out usage message. */
-static void
-help(void)
-{
-	printf(
-"TCP v%s options:\n"
-" --tcp-flags [!] mask comp	match when TCP flags & mask == comp\n"
-"				(Flags: SYN ACK FIN RST URG PSH ALL NONE)\n"
-"[!] --syn			match when only SYN flag set\n"
-"				(equivalent to --tcp-flags SYN,RST,ACK,FIN SYN)\n"
-" --source-port [!] port[:port]\n"
-" --sport ...\n"
-"				match source port(s)\n"
-" --destination-port [!] port[:port]\n"
-" --dport ...\n"
-"				match destination port(s)\n"
-" --tcp-option [!] number       match if TCP option set\n\n",
-IPTABLES_VERSION);
-}
-
-static struct option opts[] = {
-	{ "source-port", 1, 0, '1' },
-	{ "sport", 1, 0, '1' }, /* synonym */
-	{ "destination-port", 1, 0, '2' },
-	{ "dport", 1, 0, '2' }, /* synonym */
-	{ "syn", 0, 0, '3' },
-	{ "tcp-flags", 1, 0, '4' },
-	{ "tcp-option", 1, 0, '5' },
-	{0}
-};
-
-static void
-parse_tcp_ports(const char *portstring, u_int16_t *ports)
-{
-	char *buffer;
-	char *cp;
-
-	buffer = strdup(portstring);
-	if ((cp = strchr(buffer, ':')) == NULL)
-		ports[0] = ports[1] = parse_port(buffer, "tcp");
-	else {
-		*cp = '\0';
-		cp++;
-
-		ports[0] = buffer[0] ? parse_port(buffer, "tcp") : 0;
-		ports[1] = cp[0] ? parse_port(cp, "tcp") : 0xFFFF;
-
-		if (ports[0] > ports[1])
-			exit_error(PARAMETER_PROBLEM,
-				   "invalid portrange (min > max)");
-	}
-	free(buffer);
-}
-
-struct tcp_flag_names {
-	const char *name;
-	unsigned int flag;
-};
-
-static struct tcp_flag_names tcp_flag_names[]
-= { { "FIN", 0x01 },
-    { "SYN", 0x02 },
-    { "RST", 0x04 },
-    { "PSH", 0x08 },
-    { "ACK", 0x10 },
-    { "URG", 0x20 },
-    { "ALL", 0x3F },
-    { "NONE", 0 },
-};
-
-static unsigned int
-parse_tcp_flag(const char *flags)
-{
-	unsigned int ret = 0;
-	char *ptr;
-	char *buffer;
-
-	buffer = strdup(flags);
-
-	for (ptr = strtok(buffer, ","); ptr; ptr = strtok(NULL, ",")) {
-		unsigned int i;
-		for (i = 0;
-		     i < sizeof(tcp_flag_names)/sizeof(struct tcp_flag_names);
-		     i++) {
-			if (strcasecmp(tcp_flag_names[i].name, ptr) == 0) {
-				ret |= tcp_flag_names[i].flag;
-				break;
-			}
-		}
-		if (i == sizeof(tcp_flag_names)/sizeof(struct tcp_flag_names))
-			exit_error(PARAMETER_PROBLEM,
-				   "Unknown TCP flag `%s'", ptr);
-		}
-
-	free(buffer);
-	return ret;
-}
-
-static void
-parse_tcp_flags(struct ipt_tcp *tcpinfo,
-		const char *mask,
-		const char *cmp,
-		int invert)
-{
-	tcpinfo->flg_mask = parse_tcp_flag(mask);
-	tcpinfo->flg_cmp = parse_tcp_flag(cmp);
-
-	if (invert)
-		tcpinfo->invflags |= IPT_TCP_INV_FLAGS;
-}
-
-static void
-parse_tcp_option(const char *option, u_int8_t *result)
-{
-	unsigned int ret;
-
-	if (string_to_number(option, 1, 255, &ret) == -1)
-		exit_error(PARAMETER_PROBLEM, "Bad TCP option `%s'", option);
-
-	*result = (u_int8_t)ret;
-}
-
-/* Initialize the match. */
-static void
-init(struct xt_entry_match *m, unsigned int *nfcache)
-{
-	struct ipt_tcp *tcpinfo = (struct ipt_tcp *)m->data;
-
-	tcpinfo->spts[1] = tcpinfo->dpts[1] = 0xFFFF;
-}
-
-#define TCP_SRC_PORTS 0x01
-#define TCP_DST_PORTS 0x02
-#define TCP_FLAGS 0x04
-#define TCP_OPTION	0x08
-
-/* Function which parses command options; returns true if it
-   ate an option. */
-static int
-parse(int c, char **argv, int invert, unsigned int *flags,
-      const void *entry,
-      unsigned int *nfcache,
-      struct xt_entry_match **match)
-{
-	struct ipt_tcp *tcpinfo = (struct ipt_tcp *)(*match)->data;
-
-	switch (c) {
-	case '1':
-		if (*flags & TCP_SRC_PORTS)
-			exit_error(PARAMETER_PROBLEM,
-				   "Only one `--source-port' allowed");
-		check_inverse(optarg, &invert, &optind, 0);
-		parse_tcp_ports(argv[optind-1], tcpinfo->spts);
-		if (invert)
-			tcpinfo->invflags |= IPT_TCP_INV_SRCPT;
-		*flags |= TCP_SRC_PORTS;
-		break;
-
-	case '2':
-		if (*flags & TCP_DST_PORTS)
-			exit_error(PARAMETER_PROBLEM,
-				   "Only one `--destination-port' allowed");
-		check_inverse(optarg, &invert, &optind, 0);
-		parse_tcp_ports(argv[optind-1], tcpinfo->dpts);
-		if (invert)
-			tcpinfo->invflags |= IPT_TCP_INV_DSTPT;
-		*flags |= TCP_DST_PORTS;
-		break;
-
-	case '3':
-		if (*flags & TCP_FLAGS)
-			exit_error(PARAMETER_PROBLEM,
-				   "Only one of `--syn' or `--tcp-flags' "
-				   " allowed");
-		parse_tcp_flags(tcpinfo, "SYN,RST,ACK,FIN", "SYN", invert);
-		*flags |= TCP_FLAGS;
-		break;
-
-	case '4':
-		if (*flags & TCP_FLAGS)
-			exit_error(PARAMETER_PROBLEM,
-				   "Only one of `--syn' or `--tcp-flags' "
-				   " allowed");
-		check_inverse(optarg, &invert, &optind, 0);
-
-		if (!argv[optind]
-		    || argv[optind][0] == '-' || argv[optind][0] == '!')
-			exit_error(PARAMETER_PROBLEM,
-				   "--tcp-flags requires two args.");
-
-		parse_tcp_flags(tcpinfo, argv[optind-1], argv[optind],
-				invert);
-		optind++;
-		*flags |= TCP_FLAGS;
-		break;
-
-	case '5':
-		if (*flags & TCP_OPTION)
-			exit_error(PARAMETER_PROBLEM,
-				   "Only one `--tcp-option' allowed");
-		check_inverse(optarg, &invert, &optind, 0);
-		parse_tcp_option(argv[optind-1], &tcpinfo->option);
-		if (invert)
-			tcpinfo->invflags |= IPT_TCP_INV_OPTION;
-		*flags |= TCP_OPTION;
-		break;
-
-	default:
-		return 0;
-	}
-
-	return 1;
-}
-
-/* Final check; we don't care. */
-static void
-final_check(unsigned int flags)
-{
-}
-
-static char *
-port_to_service(int port)
-{
-	struct servent *service;
-
-	if ((service = getservbyport(htons(port), "tcp")))
-		return service->s_name;
-
-	return NULL;
-}
-
-static void
-print_port(u_int16_t port, int numeric)
-{
-	char *service;
-
-	if (numeric || (service = port_to_service(port)) == NULL)
-		printf("%u", port);
-	else
-		printf("%s", service);
-}
-
-static void
-print_ports(const char *name, u_int16_t min, u_int16_t max,
-	    int invert, int numeric)
-{
-	const char *inv = invert ? "!" : "";
-
-	if (min != 0 || max != 0xFFFF || invert) {
-		printf("%s", name);
-		if (min == max) {
-			printf(":%s", inv);
-			print_port(min, numeric);
-		} else {
-			printf("s:%s", inv);
-			print_port(min, numeric);
-			printf(":");
-			print_port(max, numeric);
-		}
-		printf(" ");
-	}
-}
-
-static void
-print_option(u_int8_t option, int invert, int numeric)
-{
-	if (option || invert)
-		printf("option=%s%u ", invert ? "!" : "", option);
-}
-
-static void
-print_tcpf(u_int8_t flags)
-{
-	int have_flag = 0;
-
-	while (flags) {
-		unsigned int i;
-
-		for (i = 0; (flags & tcp_flag_names[i].flag) == 0; i++);
-
-		if (have_flag)
-			printf(",");
-		printf("%s", tcp_flag_names[i].name);
-		have_flag = 1;
-
-		flags &= ~tcp_flag_names[i].flag;
-	}
-
-	if (!have_flag)
-		printf("NONE");
-}
-
-static void
-print_flags(u_int8_t mask, u_int8_t cmp, int invert, int numeric)
-{
-	if (mask || invert) {
-		printf("flags:%s", invert ? "!" : "");
-		if (numeric)
-			printf("0x%02X/0x%02X ", mask, cmp);
-		else {
-			print_tcpf(mask);
-			printf("/");
-			print_tcpf(cmp);
-			printf(" ");
-		}
-	}
-}
-
-/* Prints out the union ipt_matchinfo. */
-static void
-print(const void *ip,
-      const struct xt_entry_match *match, int numeric)
-{
-	const struct ipt_tcp *tcp = (struct ipt_tcp *)match->data;
-
-	printf("tcp ");
-	print_ports("spt", tcp->spts[0], tcp->spts[1],
-		    tcp->invflags & IPT_TCP_INV_SRCPT,
-		    numeric);
-	print_ports("dpt", tcp->dpts[0], tcp->dpts[1],
-		    tcp->invflags & IPT_TCP_INV_DSTPT,
-		    numeric);
-	print_option(tcp->option,
-		     tcp->invflags & IPT_TCP_INV_OPTION,
-		     numeric);
-	print_flags(tcp->flg_mask, tcp->flg_cmp,
-		    tcp->invflags & IPT_TCP_INV_FLAGS,
-		    numeric);
-	if (tcp->invflags & ~IPT_TCP_INV_MASK)
-		printf("Unknown invflags: 0x%X ",
-		       tcp->invflags & ~IPT_TCP_INV_MASK);
-}
-
-/* Saves the union ipt_matchinfo in parsable form to stdout. */
-static void save(const void *ip, const struct xt_entry_match *match)
-{
-	const struct ipt_tcp *tcpinfo = (struct ipt_tcp *)match->data;
-
-	if (tcpinfo->spts[0] != 0
-	    || tcpinfo->spts[1] != 0xFFFF) {
-		if (tcpinfo->invflags & IPT_TCP_INV_SRCPT)
-			printf("! ");
-		if (tcpinfo->spts[0]
-		    != tcpinfo->spts[1])
-			printf("--sport %u:%u ",
-			       tcpinfo->spts[0],
-			       tcpinfo->spts[1]);
-		else
-			printf("--sport %u ",
-			       tcpinfo->spts[0]);
-	}
-
-	if (tcpinfo->dpts[0] != 0
-	    || tcpinfo->dpts[1] != 0xFFFF) {
-		if (tcpinfo->invflags & IPT_TCP_INV_DSTPT)
-			printf("! ");
-		if (tcpinfo->dpts[0]
-		    != tcpinfo->dpts[1])
-			printf("--dport %u:%u ",
-			       tcpinfo->dpts[0],
-			       tcpinfo->dpts[1]);
-		else
-			printf("--dport %u ",
-			       tcpinfo->dpts[0]);
-	}
-
-	if (tcpinfo->option
-	    || (tcpinfo->invflags & IPT_TCP_INV_OPTION)) {
-		if (tcpinfo->invflags & IPT_TCP_INV_OPTION)
-			printf("! ");
-		printf("--tcp-option %u ", tcpinfo->option);
-	}
-
-	if (tcpinfo->flg_mask
-	    || (tcpinfo->invflags & IPT_TCP_INV_FLAGS)) {
-		if (tcpinfo->invflags & IPT_TCP_INV_FLAGS)
-			printf("! ");
-		printf("--tcp-flags ");
-		if (tcpinfo->flg_mask != 0xFF) {
-			print_tcpf(tcpinfo->flg_mask);
-		}
-		printf(" ");
-		print_tcpf(tcpinfo->flg_cmp);
-		printf(" ");
-	}
-}
-
-static struct iptables_match tcp = { 
-	.next		= NULL,
-	.name		= "tcp",
-	.version	= IPTABLES_VERSION,
-	.size		= IPT_ALIGN(sizeof(struct ipt_tcp)),
-	.userspacesize	= IPT_ALIGN(sizeof(struct ipt_tcp)),
-	.help		= &help,
-	.init		= &init,
-	.parse		= &parse,
-	.final_check	= &final_check,
-	.print		= &print,
-	.save		= &save,
-	.extra_opts	= opts
-};
-
-void
-_init(void)
-{
-	register_match(&tcp);
-}