projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* 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> | |
| 080774a2 | 5 | #include <linux/netfilter/nfnetlink_conntrack.h> |
| 1da177e4 LT |
6 | |
| 7 | struct seq_file; | |
| 8 | ||
| 9 | struct ip_conntrack_protocol | |
| 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: dataoff is offset past IP | |
| 18 | hdr. Return true if possible. */ | |
| 19 | int (*pkt_to_tuple)(const struct sk_buff *skb, | |
| 20 | unsigned int dataoff, | |
| 21 | struct ip_conntrack_tuple *tuple); | |
| 22 | ||
| 23 | /* Invert the per-proto part of the tuple: ie. turn xmit into reply. | |
| 24 | * Some packets can't be inverted: return 0 in that case. | |
| 25 | */ | |
| 26 | int (*invert_tuple)(struct ip_conntrack_tuple *inverse, | |
| 27 | const struct ip_conntrack_tuple *orig); | |
| 28 | ||
| 29 | /* Print out the per-protocol part of the tuple. Return like seq_* */ | |
| 30 | int (*print_tuple)(struct seq_file *, | |
| 31 | const struct ip_conntrack_tuple *); | |
| 32 | ||
| 33 | /* Print out the private part of the conntrack. */ | |
| 34 | int (*print_conntrack)(struct seq_file *, const struct ip_conntrack *); | |
| 35 | ||
| 36 | /* Returns verdict for packet, or -1 for invalid. */ | |
| 37 | int (*packet)(struct ip_conntrack *conntrack, | |
| 38 | const struct sk_buff *skb, | |
| 39 | enum ip_conntrack_info ctinfo); | |
| 40 | ||
| 41 | /* Called when a new connection for this protocol found; | |
| 42 | * returns TRUE if it's OK. If so, packet() called next. */ | |
| 43 | int (*new)(struct ip_conntrack *conntrack, const struct sk_buff *skb); | |
| 44 | ||
| 45 | /* Called when a conntrack entry is destroyed */ | |
| 46 | void (*destroy)(struct ip_conntrack *conntrack); | |
| 47 | ||
| 48 | int (*error)(struct sk_buff *skb, enum ip_conntrack_info *ctinfo, | |
| 49 | unsigned int hooknum); | |
| 50 | ||
| 080774a2 HW |
51 | /* convert protoinfo to nfnetink attributes */ |
| 52 | int (*to_nfattr)(struct sk_buff *skb, struct nfattr *nfa, | |
| 53 | const struct ip_conntrack *ct); | |
| 54 | ||
| 55 | int (*tuple_to_nfattr)(struct sk_buff *skb, | |
| 56 | const struct ip_conntrack_tuple *t); | |
| 57 | int (*nfattr_to_tuple)(struct nfattr *tb[], | |
| 58 | struct ip_conntrack_tuple *t); | |
| 59 | ||
| 1da177e4 LT |
60 | /* Module (if any) which this is connected to. */ |
| 61 | struct module *me; | |
| 62 | }; | |
| 63 | ||
| 1da177e4 LT |
64 | /* Protocol registration. */ |
| 65 | extern int ip_conntrack_protocol_register(struct ip_conntrack_protocol *proto); | |
| 66 | extern void ip_conntrack_protocol_unregister(struct ip_conntrack_protocol *proto); | |
| 1da177e4 LT |
67 | /* Existing built-in protocols */ |
| 68 | extern struct ip_conntrack_protocol ip_conntrack_protocol_tcp; | |
| 69 | extern struct ip_conntrack_protocol ip_conntrack_protocol_udp; | |
| 70 | extern struct ip_conntrack_protocol ip_conntrack_protocol_icmp; | |
| 71 | extern struct ip_conntrack_protocol ip_conntrack_generic_protocol; | |
| 72 | extern int ip_conntrack_protocol_tcp_init(void); | |
| 73 | ||
| 74 | /* Log invalid packets */ | |
| 75 | extern unsigned int ip_ct_log_invalid; | |
| 76 | ||
| 080774a2 HW |
77 | extern int ip_ct_port_tuple_to_nfattr(struct sk_buff *, |
| 78 | const struct ip_conntrack_tuple *); | |
| 79 | extern int ip_ct_port_nfattr_to_tuple(struct nfattr *tb[], | |
| 80 | struct ip_conntrack_tuple *); | |
| 81 | ||
| 1da177e4 LT |
82 | #ifdef CONFIG_SYSCTL |
| 83 | #ifdef DEBUG_INVALID_PACKETS | |
| 84 | #define LOG_INVALID(proto) \ | |
| 85 | (ip_ct_log_invalid == (proto) || ip_ct_log_invalid == IPPROTO_RAW) | |
| 86 | #else | |
| 87 | #define LOG_INVALID(proto) \ | |
| 88 | ((ip_ct_log_invalid == (proto) || ip_ct_log_invalid == IPPROTO_RAW) \ | |
| 89 | && net_ratelimit()) | |
| 90 | #endif | |
| 91 | #else | |
| 92 | #define LOG_INVALID(proto) 0 | |
| 93 | #endif /* CONFIG_SYSCTL */ | |
| 94 | ||
| 95 | #endif /*_IP_CONNTRACK_PROTOCOL_H*/ |