1 #ifndef _IP_CONNTRACK_TUPLE_H
2 #define _IP_CONNTRACK_TUPLE_H
4 /* A `tuple' is a structure containing the information to uniquely
5 identify a connection. ie. if two packets have the same tuple, they
6 are in the same connection; if not, they are not.
8 We divide the structure along "manipulatable" and
9 "non-manipulatable" lines, for the benefit of the NAT code.
12 /* The protocol-specific manipulable parts of the tuple: always in
14 union ip_conntrack_manip_proto
16 /* Add other protocols here. */
33 /* The manipulable part of the tuple. */
34 struct ip_conntrack_manip
37 union ip_conntrack_manip_proto u;
40 /* This contains the information to distinguish a connection. */
41 struct ip_conntrack_tuple
43 struct ip_conntrack_manip src;
45 /* These are the parts of the tuple which are fixed. */
49 /* Add other protocols here. */
69 /* The direction (for tuplehash) */
74 /* This is optimized opposed to a memset of the whole structure. Everything we
75 * really care about is the source/destination unions */
76 #define IP_CT_TUPLE_U_BLANK(tuple) \
78 (tuple)->src.u.all = 0; \
79 (tuple)->dst.u.all = 0; \
91 #define DUMP_TUPLE(tp) \
92 DEBUGP("tuple %p: %u %u.%u.%u.%u:%hu -> %u.%u.%u.%u:%hu\n", \
93 (tp), (tp)->dst.protonum, \
94 NIPQUAD((tp)->src.ip), ntohs((tp)->src.u.all), \
95 NIPQUAD((tp)->dst.ip), ntohs((tp)->dst.u.all))
97 #define CTINFO2DIR(ctinfo) ((ctinfo) >= IP_CT_IS_REPLY ? IP_CT_DIR_REPLY : IP_CT_DIR_ORIGINAL)
99 /* If we're the first tuple, it's the original dir. */
100 #define DIRECTION(h) ((enum ip_conntrack_dir)(h)->tuple.dst.dir)
102 /* Connections have two entries in the hash table: one for each way */
103 struct ip_conntrack_tuple_hash
105 struct list_head list;
107 struct ip_conntrack_tuple tuple;
110 #endif /* __KERNEL__ */
112 static inline int ip_ct_tuple_src_equal(const struct ip_conntrack_tuple *t1,
113 const struct ip_conntrack_tuple *t2)
115 return t1->src.ip == t2->src.ip
116 && t1->src.u.all == t2->src.u.all;
119 static inline int ip_ct_tuple_dst_equal(const struct ip_conntrack_tuple *t1,
120 const struct ip_conntrack_tuple *t2)
122 return t1->dst.ip == t2->dst.ip
123 && t1->dst.u.all == t2->dst.u.all
124 && t1->dst.protonum == t2->dst.protonum;
127 static inline int ip_ct_tuple_equal(const struct ip_conntrack_tuple *t1,
128 const struct ip_conntrack_tuple *t2)
130 return ip_ct_tuple_src_equal(t1, t2) && ip_ct_tuple_dst_equal(t1, t2);
133 static inline int ip_ct_tuple_mask_cmp(const struct ip_conntrack_tuple *t,
134 const struct ip_conntrack_tuple *tuple,
135 const struct ip_conntrack_tuple *mask)
137 return !(((t->src.ip ^ tuple->src.ip) & mask->src.ip)
138 || ((t->dst.ip ^ tuple->dst.ip) & mask->dst.ip)
139 || ((t->src.u.all ^ tuple->src.u.all) & mask->src.u.all)
140 || ((t->dst.u.all ^ tuple->dst.u.all) & mask->dst.u.all)
141 || ((t->dst.protonum ^ tuple->dst.protonum)
142 & mask->dst.protonum));
145 #endif /* _IP_CONNTRACK_TUPLE_H */