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ip_conntrack_protocol.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:2k
源码类别:
Linux/Unix编程
开发平台:
Unix_Linux
- /* 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);
- /* Called when a conntrack entry is destroyed */
- void (*destroy)(struct ip_conntrack *conntrack);
- /* Has to decide if a expectation matches one packet or not */
- int (*exp_matches_pkt)(struct ip_conntrack_expect *exp,
- struct sk_buff **pskb);
- /* 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*/