patch-2.3.99-pre2 linux/net/ipv4/netfilter/ip_conntrack_proto_udp.c

• Lines: 66
• Date: Fri Mar 17 10:56:20 2000
• Orig file: v2.3.99-pre1/linux/net/ipv4/netfilter/ip_conntrack_proto_udp.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.99-pre1/linux/net/ipv4/netfilter/ip_conntrack_proto_udp.c linux/net/ipv4/netfilter/ip_conntrack_proto_udp.c
@@ -0,0 +1,65 @@
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/netfilter.h>
+#include <linux/udp.h>
+#include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
+
+#define UDP_TIMEOUT (60*HZ)
+
+static int udp_pkt_to_tuple(const void *datah, size_t datalen,
+			    struct ip_conntrack_tuple *tuple)
+{
+	const struct udphdr *hdr = datah;
+
+	tuple->src.u.udp.port = hdr->source;
+	tuple->dst.u.udp.port = hdr->dest;
+
+	return 1;
+}
+
+static int udp_invert_tuple(struct ip_conntrack_tuple *tuple,
+			    const struct ip_conntrack_tuple *orig)
+{
+	tuple->src.u.udp.port = orig->dst.u.udp.port;
+	tuple->dst.u.udp.port = orig->src.u.udp.port;
+	return 1;
+}
+
+/* Print out the per-protocol part of the tuple. */
+static unsigned int udp_print_tuple(char *buffer,
+				    const struct ip_conntrack_tuple *tuple)
+{
+	return sprintf(buffer, "sport=%hu dport=%hu ",
+		       ntohs(tuple->src.u.udp.port),
+		       ntohs(tuple->dst.u.udp.port));
+}
+
+/* Print out the private part of the conntrack. */
+static unsigned int udp_print_conntrack(char *buffer,
+					const struct ip_conntrack *conntrack)
+{
+	return 0;
+}
+
+/* Returns verdict for packet, and may modify conntracktype */
+static int udp_packet(struct ip_conntrack *conntrack,
+		      struct iphdr *iph, size_t len,
+		      enum ip_conntrack_info conntrackinfo)
+{
+	/* Refresh. */
+	ip_ct_refresh(conntrack, UDP_TIMEOUT);
+	return NF_ACCEPT;
+}
+
+/* Called when a new connection for this protocol found. */
+static int udp_new(struct ip_conntrack *conntrack,
+		    struct iphdr *iph, size_t len)
+{
+	return 1;
+}
+
+struct ip_conntrack_protocol ip_conntrack_protocol_udp
+= { { NULL, NULL }, IPPROTO_UDP, "udp",
+    udp_pkt_to_tuple, udp_invert_tuple, udp_print_tuple, udp_print_conntrack,
+    udp_packet, udp_new, NULL };