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