patch-2.3.99-pre2 linux/include/linux/netfilter_ipv4/ip_conntrack_protocol.h

• Lines: 59
• Date: Fri Mar 17 10:56:20 2000
• Orig file: v2.3.99-pre1/linux/include/linux/netfilter_ipv4/ip_conntrack_protocol.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.99-pre1/linux/include/linux/netfilter_ipv4/ip_conntrack_protocol.h linux/include/linux/netfilter_ipv4/ip_conntrack_protocol.h
@@ -0,0 +1,58 @@
+/* Header for use in defining a given protocol for connection tracking. */
+#ifndef _IP_CONNTRACK_PROTOCOL_H
+#define _IP_CONNTRACK_PROTOCOL_H
+#include <linux/netfilter_ipv4/ip_conntrack.h>
+
+struct ip_conntrack_protocol
+{
+	/* Next pointer. */
+	struct list_head list;
+
+	/* Protocol number. */
+	u_int8_t proto;
+
+	/* Protocol name */
+	const char *name;
+
+	/* Try to fill in the third arg; return true if possible. */
+	int (*pkt_to_tuple)(const void *datah, size_t datalen,
+			    struct ip_conntrack_tuple *tuple);
+
+	/* Invert the per-proto part of the tuple: ie. turn xmit into reply.
+	 * Some packets can't be inverted: return 0 in that case.
+	 */
+	int (*invert_tuple)(struct ip_conntrack_tuple *inverse,
+			    const struct ip_conntrack_tuple *orig);
+
+	/* Print out the per-protocol part of the tuple. */
+	unsigned int (*print_tuple)(char *buffer,
+				    const struct ip_conntrack_tuple *);
+
+	/* Print out the private part of the conntrack. */
+	unsigned int (*print_conntrack)(char *buffer,
+					const struct ip_conntrack *);
+
+	/* Returns verdict for packet, or -1 for invalid. */
+	int (*packet)(struct ip_conntrack *conntrack,
+		      struct iphdr *iph, size_t len,
+		      enum ip_conntrack_info ctinfo);
+
+	/* Called when a new connection for this protocol found; returns
+	 * TRUE if it's OK.  If so, packet() called next. */
+	int (*new)(struct ip_conntrack *conntrack,
+		   struct iphdr *iph, size_t len);
+
+	/* Module (if any) which this is connected to. */
+	struct module *me;
+};
+
+/* Protocol registration. */
+extern int ip_conntrack_protocol_register(struct ip_conntrack_protocol *proto);
+extern void ip_conntrack_protocol_unregister(struct ip_conntrack_protocol *proto);
+
+/* Existing built-in protocols */
+extern struct ip_conntrack_protocol ip_conntrack_protocol_tcp;
+extern struct ip_conntrack_protocol ip_conntrack_protocol_udp;
+extern struct ip_conntrack_protocol ip_conntrack_protocol_icmp;
+extern int ip_conntrack_protocol_tcp_init(void);
+#endif /*_IP_CONNTRACK_PROTOCOL_H*/