| 1 |
1275 |
phoenix |
/* Header for use in defining a given protocol for connection tracking. */
|
| 2 |
|
|
#ifndef _IP_CONNTRACK_PROTOCOL_H
|
| 3 |
|
|
#define _IP_CONNTRACK_PROTOCOL_H
|
| 4 |
|
|
#include <linux/netfilter_ipv4/ip_conntrack.h>
|
| 5 |
|
|
|
| 6 |
|
|
struct ip_conntrack_protocol
|
| 7 |
|
|
{
|
| 8 |
|
|
/* Next pointer. */
|
| 9 |
|
|
struct list_head list;
|
| 10 |
|
|
|
| 11 |
|
|
/* Protocol number. */
|
| 12 |
|
|
u_int8_t proto;
|
| 13 |
|
|
|
| 14 |
|
|
/* Protocol name */
|
| 15 |
|
|
const char *name;
|
| 16 |
|
|
|
| 17 |
|
|
/* Try to fill in the third arg; return true if possible. */
|
| 18 |
|
|
int (*pkt_to_tuple)(const void *datah, size_t datalen,
|
| 19 |
|
|
struct ip_conntrack_tuple *tuple);
|
| 20 |
|
|
|
| 21 |
|
|
/* Invert the per-proto part of the tuple: ie. turn xmit into reply.
|
| 22 |
|
|
* Some packets can't be inverted: return 0 in that case.
|
| 23 |
|
|
*/
|
| 24 |
|
|
int (*invert_tuple)(struct ip_conntrack_tuple *inverse,
|
| 25 |
|
|
const struct ip_conntrack_tuple *orig);
|
| 26 |
|
|
|
| 27 |
|
|
/* Print out the per-protocol part of the tuple. */
|
| 28 |
|
|
unsigned int (*print_tuple)(char *buffer,
|
| 29 |
|
|
const struct ip_conntrack_tuple *);
|
| 30 |
|
|
|
| 31 |
|
|
/* Print out the private part of the conntrack. */
|
| 32 |
|
|
unsigned int (*print_conntrack)(char *buffer,
|
| 33 |
|
|
const struct ip_conntrack *);
|
| 34 |
|
|
|
| 35 |
|
|
/* Returns verdict for packet, or -1 for invalid. */
|
| 36 |
|
|
int (*packet)(struct ip_conntrack *conntrack,
|
| 37 |
|
|
struct iphdr *iph, size_t len,
|
| 38 |
|
|
enum ip_conntrack_info ctinfo);
|
| 39 |
|
|
|
| 40 |
|
|
/* Called when a new connection for this protocol found;
|
| 41 |
|
|
* returns TRUE if it's OK. If so, packet() called next. */
|
| 42 |
|
|
int (*new)(struct ip_conntrack *conntrack, struct iphdr *iph,
|
| 43 |
|
|
size_t len);
|
| 44 |
|
|
|
| 45 |
|
|
/* Called when a conntrack entry is destroyed */
|
| 46 |
|
|
void (*destroy)(struct ip_conntrack *conntrack);
|
| 47 |
|
|
|
| 48 |
|
|
/* Has to decide if a expectation matches one packet or not */
|
| 49 |
|
|
int (*exp_matches_pkt)(struct ip_conntrack_expect *exp,
|
| 50 |
|
|
struct sk_buff **pskb);
|
| 51 |
|
|
|
| 52 |
|
|
/* Module (if any) which this is connected to. */
|
| 53 |
|
|
struct module *me;
|
| 54 |
|
|
};
|
| 55 |
|
|
|
| 56 |
|
|
/* Protocol registration. */
|
| 57 |
|
|
extern int ip_conntrack_protocol_register(struct ip_conntrack_protocol *proto);
|
| 58 |
|
|
extern void ip_conntrack_protocol_unregister(struct ip_conntrack_protocol *proto);
|
| 59 |
|
|
|
| 60 |
|
|
/* Existing built-in protocols */
|
| 61 |
|
|
extern struct ip_conntrack_protocol ip_conntrack_protocol_tcp;
|
| 62 |
|
|
extern struct ip_conntrack_protocol ip_conntrack_protocol_udp;
|
| 63 |
|
|
extern struct ip_conntrack_protocol ip_conntrack_protocol_icmp;
|
| 64 |
|
|
extern int ip_conntrack_protocol_tcp_init(void);
|
| 65 |
|
|
#endif /*_IP_CONNTRACK_PROTOCOL_H*/
|
