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. */
32 u_int16_t key; /* key is 32bit, pptp onky uses 16 */
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:%hu -> %u.%u.%u.%u:%hu\n", \
99 (tp), (tp)->dst.protonum, \
100 NIPQUAD((tp)->src.ip), ntohs((tp)->src.u.all), \
101 NIPQUAD((tp)->dst.ip), ntohs((tp)->dst.u.all))
103 #define CTINFO2DIR(ctinfo) ((ctinfo) >= IP_CT_IS_REPLY ? IP_CT_DIR_REPLY : IP_CT_DIR_ORIGINAL)
105 /* If we're the first tuple, it's the original dir. */
106 #define DIRECTION(h) ((enum ip_conntrack_dir)(h)->tuple.dst.dir)
108 /* Connections have two entries in the hash table: one for each way */
109 struct ip_conntrack_tuple_hash
111 struct list_head list;
113 struct ip_conntrack_tuple tuple;
116 #endif /* __KERNEL__ */
118 static inline int ip_ct_tuple_src_equal(const struct ip_conntrack_tuple *t1,
119 const struct ip_conntrack_tuple *t2)
121 return t1->src.ip == t2->src.ip
122 && t1->src.u.all == t2->src.u.all;
125 static inline int ip_ct_tuple_dst_equal(const struct ip_conntrack_tuple *t1,
126 const struct ip_conntrack_tuple *t2)
128 return t1->dst.ip == t2->dst.ip
129 && t1->dst.u.all == t2->dst.u.all
130 && t1->dst.protonum == t2->dst.protonum;
133 static inline int ip_ct_tuple_equal(const struct ip_conntrack_tuple *t1,
134 const struct ip_conntrack_tuple *t2)
136 return ip_ct_tuple_src_equal(t1, t2) && ip_ct_tuple_dst_equal(t1, t2);
139 static inline int ip_ct_tuple_mask_cmp(const struct ip_conntrack_tuple *t,
140 const struct ip_conntrack_tuple *tuple,
141 const struct ip_conntrack_tuple *mask)
143 return !(((t->src.ip ^ tuple->src.ip) & mask->src.ip)
144 || ((t->dst.ip ^ tuple->dst.ip) & mask->dst.ip)
145 || ((t->src.u.all ^ tuple->src.u.all) & mask->src.u.all)
146 || ((t->dst.u.all ^ tuple->dst.u.all) & mask->dst.u.all)
147 || ((t->dst.protonum ^ tuple->dst.protonum)
148 & mask->dst.protonum));
151 #endif /* _IP_CONNTRACK_TUPLE_H */