1 files changed, 84 insertions, 0 deletions
diff --git a/src/deprecated/extensions/libnetfilter_conntrack_udp.c b/src/deprecated/extensions/libnetfilter_conntrack_udp.c
new file mode 100644
index 0000000..c1d20c3
--- /dev/null
+++ b/src/deprecated/extensions/libnetfilter_conntrack_udp.c
@@ -0,0 +1,84 @@
+/*
+ * (C) 2005 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 <string.h>
+#include <netinet/in.h> /* For htons */
+#include <libnetfilter_conntrack/linux_nfnetlink_conntrack.h>
+#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
+#include <libnetfilter_conntrack/libnetfilter_conntrack_extensions.h>
+#include <libnetfilter_conntrack/libnetfilter_conntrack_udp.h>
+
+static void parse_proto(struct nfattr *cda[], struct nfct_tuple *tuple)
+{
+	if (cda[CTA_PROTO_SRC_PORT-1])
+		tuple->l4src.udp.port =
+			*(u_int16_t *)NFA_DATA(cda[CTA_PROTO_SRC_PORT-1]);
+	if (cda[CTA_PROTO_DST_PORT-1])
+		tuple->l4dst.udp.port =
+			*(u_int16_t *)NFA_DATA(cda[CTA_PROTO_DST_PORT-1]);
+}
+
+static int print_proto(char *buf, struct nfct_tuple *tuple)
+{
+	return (sprintf(buf, "sport=%u dport=%u ", htons(tuple->l4src.udp.port),
+					           htons(tuple->l4dst.udp.port)));
+}
+
+static void build_tuple_proto(struct nfnlhdr *req, int size, 
+			      struct nfct_tuple *t)
+{
+	nfnl_addattr_l(&req->nlh, size, CTA_PROTO_SRC_PORT,
+		       &t->l4src.udp.port, sizeof(u_int16_t));
+	nfnl_addattr_l(&req->nlh, size, CTA_PROTO_DST_PORT,
+		       &t->l4dst.udp.port, sizeof(u_int16_t));
+}
+
+static int compare(struct nfct_conntrack *ct1,
+		   struct nfct_conntrack *ct2,
+		   unsigned int flags)
+{
+	if (flags & UDP_ORIG_SPORT)
+		if (ct1->tuple[NFCT_DIR_ORIGINAL].l4src.udp.port !=
+		    ct2->tuple[NFCT_DIR_ORIGINAL].l4src.udp.port)
+			return 0;
+	if (flags & UDP_ORIG_DPORT)
+		if (ct1->tuple[NFCT_DIR_ORIGINAL].l4dst.udp.port !=
+		    ct2->tuple[NFCT_DIR_ORIGINAL].l4dst.udp.port)
+			return 0;
+	if (flags & UDP_REPL_SPORT)
+		if (ct1->tuple[NFCT_DIR_REPLY].l4src.udp.port !=
+		    ct2->tuple[NFCT_DIR_REPLY].l4src.udp.port)
+			return 0;
+	if (flags & UDP_REPL_DPORT)
+		if (ct1->tuple[NFCT_DIR_REPLY].l4dst.udp.port !=
+		    ct2->tuple[NFCT_DIR_REPLY].l4dst.udp.port)
+			return 0;
+
+	return 1;
+}
+
+static struct nfct_proto udp = {
+	.name 			= "udp",
+	.protonum		= IPPROTO_UDP,
+	.build_tuple_proto	= build_tuple_proto,
+	.parse_proto		= parse_proto,
+	.print_proto		= print_proto,
+	.compare		= compare,
+	.version		= VERSION,
+};
+
+static void __attribute__ ((constructor)) init(void);
+
+static void init(void)
+{
+	nfct_register_proto(&udp);
+}