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. */
36 /* The manipulable part of the tuple. */
37 struct ip_conntrack_manip
40 union ip_conntrack_manip_proto u;
43 /* This contains the information to distinguish a connection. */
44 struct ip_conntrack_tuple
46 struct ip_conntrack_manip src;
48 /* These are the parts of the tuple which are fixed. */
52 /* Add other protocols here. */
75 /* The direction (for tuplehash) */
80 /* This is optimized opposed to a memset of the whole structure. Everything we
81 * really care about is the source/destination unions */
82 #define IP_CT_TUPLE_U_BLANK(tuple) \
84 (tuple)->src.u.all = 0; \
85 (tuple)->dst.u.all = 0; \
97 #define DUMP_TUPLE(tp) \
98 DEBUGP("tuple %p: %u %u.%u.%u.%u:%u -> %u.%u.%u.%u:%u\n", \
99 (tp), (tp)->dst.protonum, \
100 NIPQUAD((tp)->src.ip), ntohl((tp)->src.u.all), \
101 NIPQUAD((tp)->dst.ip), ntohl((tp)->dst.u.all))
103 #define DUMP_TUPLE_RAW(x) \
104 DEBUGP("tuple %p: %u %u.%u.%u.%u:0x%08x -> %u.%u.%u.%u:0x%08x\n",\
105 (x), (x)->dst.protonum, \
106 NIPQUAD((x)->src.ip), ntohl((x)->src.u.all), \
107 NIPQUAD((x)->dst.ip), ntohl((x)->dst.u.all))
109 #define CTINFO2DIR(ctinfo) ((ctinfo) >= IP_CT_IS_REPLY ? IP_CT_DIR_REPLY : IP_CT_DIR_ORIGINAL)
111 /* If we're the first tuple, it's the original dir. */
112 #define DIRECTION(h) ((enum ip_conntrack_dir)(h)->tuple.dst.dir)
114 /* Connections have two entries in the hash table: one for each way */
115 struct ip_conntrack_tuple_hash
117 struct list_head list;
119 struct ip_conntrack_tuple tuple;
122 #endif /* __KERNEL__ */
124 static inline int ip_ct_tuple_src_equal(const struct ip_conntrack_tuple *t1,
125 const struct ip_conntrack_tuple *t2)
127 return t1->src.ip == t2->src.ip
128 && t1->src.u.all == t2->src.u.all;
131 static inline int ip_ct_tuple_dst_equal(const struct ip_conntrack_tuple *t1,
132 const struct ip_conntrack_tuple *t2)
134 return t1->dst.ip == t2->dst.ip
135 && t1->dst.u.all == t2->dst.u.all
136 && t1->dst.protonum == t2->dst.protonum;
139 static inline int ip_ct_tuple_equal(const struct ip_conntrack_tuple *t1,
140 const struct ip_conntrack_tuple *t2)
142 return ip_ct_tuple_src_equal(t1, t2) && ip_ct_tuple_dst_equal(t1, t2);
145 static inline int ip_ct_tuple_mask_cmp(const struct ip_conntrack_tuple *t,
146 const struct ip_conntrack_tuple *tuple,
147 const struct ip_conntrack_tuple *mask)
149 return !(((t->src.ip ^ tuple->src.ip) & mask->src.ip)
150 || ((t->dst.ip ^ tuple->dst.ip) & mask->dst.ip)
151 || ((t->src.u.all ^ tuple->src.u.all) & mask->src.u.all)
152 || ((t->dst.u.all ^ tuple->dst.u.all) & mask->dst.u.all)
153 || ((t->dst.protonum ^ tuple->dst.protonum)
154 & mask->dst.protonum));
157 #endif /* _IP_CONNTRACK_TUPLE_H */