debian conntrack 0.9.14-2

1 files changed, 192 insertions, 0 deletions

diff --git a/extensions/libct_proto_udp.c b/extensions/libct_proto_udp.c
new file mode 100644
index 0000000..d7c4da1
--- /dev/null
+++ b/extensions/libct_proto_udp.c
@@ -0,0 +1,192 @@
+/*
+ * (C) 2005-2007 by Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ *      This program is free software; you can redistribute it and/or modify
+ *      it under the terms of the GNU General Public License as published by
+ *      the Free Software Foundation; either version 2 of the License, or
+ *      (at your option) any later version.
+ *
+ */
+#include <stdio.h>
+#include <getopt.h>
+#include <stdlib.h>
+#include <netinet/in.h> /* For htons */
+#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
+
+#include "conntrack.h"
+
+enum {
+	CT_UDP_ORIG_SPORT =	(1 << 0),
+	CT_UDP_ORIG_DPORT =	(1 << 1),
+	CT_UDP_REPL_SPORT =	(1 << 2),
+	CT_UDP_REPL_DPORT =	(1 << 3),
+	CT_UDP_MASK_SPORT =	(1 << 4),
+	CT_UDP_MASK_DPORT =	(1 << 5),
+	CT_UDP_EXPTUPLE_SPORT =	(1 << 6),
+	CT_UDP_EXPTUPLE_DPORT =	(1 << 7)
+};
+
+static struct option opts[] = {
+	{"orig-port-src", 1, 0, '1'},
+	{"sport", 1, 0, '1'},
+	{"orig-port-dst", 1, 0, '2'},
+	{"dport", 1, 0, '2'},
+	{"reply-port-src", 1, 0, '3'},
+	{"reply-port-dst", 1, 0, '4'},
+	{"mask-port-src", 1, 0, '5'},
+	{"mask-port-dst", 1, 0, '6'},
+	{"tuple-port-src", 1, 0, '7'},
+	{"tuple-port-dst", 1, 0, '8'},
+	{0, 0, 0, 0}
+};
+
+#define UDP_NUMBER_OF_OPT       9
+
+static const char *udp_optflags[UDP_NUMBER_OF_OPT] = {
+"sport", "dport", "reply-port-src", "reply-port-dst", "mask-port-src",
+"mask-port-dst", "tuple-port-src", "tuple-port-dst"
+};
+
+static void help(void)
+{
+	fprintf(stdout, "  --orig-port-src\t\toriginal source port\n");
+	fprintf(stdout, "  --orig-port-dst\t\toriginal destination port\n");
+	fprintf(stdout, "  --reply-port-src\t\treply source port\n");
+	fprintf(stdout, "  --reply-port-dst\t\treply destination port\n");
+	fprintf(stdout, "  --mask-port-src\t\tmask source port\n");
+	fprintf(stdout, "  --mask-port-dst\t\tmask destination port\n");
+	fprintf(stdout, "  --tuple-port-src\t\texpectation tuple src port\n");
+	fprintf(stdout, "  --tuple-port-src\t\texpectation tuple dst port\n");
+}
+
+static char udp_commands_v_options[NUMBER_OF_CMD][UDP_NUMBER_OF_OPT] =
+/* Well, it's better than "Re: Galeano vs Vargas Llosa" */
+{
+		/* 1 2 3 4 5 6 7 8 */
+/*CT_LIST*/	  {2,2,2,2,0,0,0,0},
+/*CT_CREATE*/     {3,3,3,3,0,0,0,0},
+/*CT_UPDATE*/     {2,2,2,2,0,0,0,0},
+/*CT_DELETE*/     {2,2,2,2,0,0,0,0},
+/*CT_GET*/        {3,3,3,3,0,0,0,0},
+/*CT_FLUSH*/      {0,0,0,0,0,0,0,0},
+/*CT_EVENT*/      {2,2,2,2,0,0,0,0},
+/*CT_VERSION*/    {0,0,0,0,0,0,0,0},
+/*CT_HELP*/       {0,0,0,0,0,0,0,0},
+/*EXP_LIST*/      {0,0,0,0,0,0,0,0},
+/*EXP_CREATE*/    {1,1,1,1,1,1,1,1},
+/*EXP_DELETE*/    {1,1,1,1,0,0,0,0},
+/*EXP_GET*/       {1,1,1,1,0,0,0,0},
+/*EXP_FLUSH*/     {0,0,0,0,0,0,0,0},
+/*EXP_EVENT*/     {0,0,0,0,0,0,0,0},
+};
+
+static int parse_options(char c,
+			 struct nf_conntrack *ct,
+			 struct nf_conntrack *exptuple,
+			 struct nf_conntrack *mask,
+			 unsigned int *flags)
+{
+	switch(c) {
+		u_int16_t port;
+		case '1':
+			port = htons(atoi(optarg));
+			nfct_set_attr_u16(ct, ATTR_ORIG_PORT_SRC, port);
+			nfct_set_attr_u8(ct, ATTR_ORIG_L4PROTO, IPPROTO_UDP);
+			*flags |= CT_UDP_ORIG_SPORT;
+			break;
+		case '2':
+			port = htons(atoi(optarg));
+			nfct_set_attr_u16(ct, ATTR_ORIG_PORT_DST, port);
+			nfct_set_attr_u8(ct, ATTR_ORIG_L4PROTO, IPPROTO_UDP);
+			*flags |= CT_UDP_ORIG_DPORT;
+			break;
+		case '3':
+			port = htons(atoi(optarg));
+			nfct_set_attr_u16(ct, ATTR_REPL_PORT_SRC, port);
+			nfct_set_attr_u8(ct, ATTR_REPL_L4PROTO, IPPROTO_UDP);
+			*flags |= CT_UDP_REPL_SPORT;
+			break;
+		case '4':
+			port = htons(atoi(optarg));
+			nfct_set_attr_u16(ct, ATTR_REPL_PORT_DST, port);
+			nfct_set_attr_u8(ct, ATTR_REPL_L4PROTO, IPPROTO_UDP);
+			*flags |= CT_UDP_REPL_DPORT;
+			break;
+		case '5':
+			port = htons(atoi(optarg));
+			nfct_set_attr_u16(mask, ATTR_ORIG_PORT_SRC, port);
+			nfct_set_attr_u8(mask, ATTR_ORIG_L4PROTO, IPPROTO_UDP);
+			*flags |= CT_UDP_MASK_SPORT;
+			break;
+		case '6':
+			port = htons(atoi(optarg));
+			nfct_set_attr_u16(mask, ATTR_ORIG_PORT_DST, port);
+			nfct_set_attr_u8(mask, ATTR_ORIG_L4PROTO, IPPROTO_UDP);
+			*flags |= CT_UDP_MASK_DPORT;
+			break;
+		case '7':
+			port = htons(atoi(optarg));
+			nfct_set_attr_u16(exptuple, ATTR_ORIG_PORT_SRC, port);
+			nfct_set_attr_u8(exptuple,
+					 ATTR_ORIG_L4PROTO,
+					 IPPROTO_UDP);
+			*flags |= CT_UDP_EXPTUPLE_SPORT;
+			break;
+		case '8':
+			port = htons(atoi(optarg));
+			nfct_set_attr_u16(exptuple, ATTR_ORIG_PORT_DST, port);
+			nfct_set_attr_u8(exptuple,
+					 ATTR_ORIG_L4PROTO,
+					 IPPROTO_UDP);
+			*flags |= CT_UDP_EXPTUPLE_DPORT;
+			break;
+	}
+	return 1;
+}
+
+#define UDP_VALID_FLAGS_MAX   2
+static unsigned int udp_valid_flags[UDP_VALID_FLAGS_MAX] = {
+       CT_UDP_ORIG_SPORT | CT_UDP_ORIG_DPORT,
+       CT_UDP_REPL_SPORT | CT_UDP_REPL_DPORT,
+};
+
+static void final_check(unsigned int flags,
+		        unsigned int cmd,
+		        struct nf_conntrack *ct)
+{
+	int ret, partial;
+
+	ret = generic_opt_check(flags, UDP_NUMBER_OF_OPT,
+				udp_commands_v_options[cmd], udp_optflags,
+				udp_valid_flags, UDP_VALID_FLAGS_MAX, &partial);
+	if (!ret) {
+		switch(partial) {
+		case -1:
+		case 0:
+			exit_error(PARAMETER_PROBLEM, "you have to specify "
+						      "`--sport' and "
+						      "`--dport'");
+			break;
+		case 1:
+			exit_error(PARAMETER_PROBLEM, "you have to specify "
+						      "`--reply-src-port' and "
+						      "`--reply-dst-port'");
+			break;
+		}
+	}
+}
+
+static struct ctproto_handler udp = {
+	.name 			= "udp",
+	.protonum		= IPPROTO_UDP,
+	.parse_opts		= parse_options,
+	.final_check		= final_check,
+	.help			= help,
+	.opts			= opts,
+	.version		= VERSION,
+};
+
+void register_udp(void)
+{
+	register_proto(&udp);
+}