2 * Definitions and Declarations for tuple.
4 * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
5 * - generalize L3 protocol dependent part.
7 * Derived from include/linux/netfiter_ipv4/ip_conntrack_tuple.h
10 #ifndef _NF_CONNTRACK_TUPLE_H
11 #define _NF_CONNTRACK_TUPLE_H
13 #include <linux/netfilter/nf_conntrack_tuple_common.h>
15 /* A `tuple' is a structure containing the information to uniquely
16 identify a connection. ie. if two packets have the same tuple, they
17 are in the same connection; if not, they are not.
19 We divide the structure along "manipulatable" and
20 "non-manipulatable" lines, for the benefit of the NAT code.
23 #define NF_CT_TUPLE_L3SIZE 4
25 /* The l3 protocol-specific manipulable parts of the tuple: always in
27 union nf_conntrack_address {
28 u_int32_t all[NF_CT_TUPLE_L3SIZE];
33 /* The protocol-specific manipulable parts of the tuple: always in
35 union nf_conntrack_man_proto
37 /* Add other protocols here. */
53 __be16 key; /* GRE key is 32bit, PPtP only uses 16bit */
57 /* The manipulable part of the tuple. */
58 struct nf_conntrack_man
60 union nf_conntrack_address u3;
61 union nf_conntrack_man_proto u;
62 /* Layer 3 protocol */
66 /* This contains the information to distinguish a connection. */
67 struct nf_conntrack_tuple
69 struct nf_conntrack_man src;
71 /* These are the parts of the tuple which are fixed. */
73 union nf_conntrack_address u3;
75 /* Add other protocols here. */
98 /* The direction (for tuplehash) */
103 /* This is optimized opposed to a memset of the whole structure. Everything we
104 * really care about is the source/destination unions */
105 #define NF_CT_TUPLE_U_BLANK(tuple) \
107 (tuple)->src.u.all = 0; \
108 (tuple)->dst.u.all = 0; \
109 memset(&(tuple)->src.u3, 0, sizeof((tuple)->src.u3)); \
110 memset(&(tuple)->dst.u3, 0, sizeof((tuple)->dst.u3)); \
115 #define NF_CT_DUMP_TUPLE(tp) \
116 DEBUGP("tuple %p: %u %u " NIP6_FMT " %hu -> " NIP6_FMT " %hu\n", \
117 (tp), (tp)->src.l3num, (tp)->dst.protonum, \
118 NIP6(*(struct in6_addr *)(tp)->src.u3.all), ntohs((tp)->src.u.all), \
119 NIP6(*(struct in6_addr *)(tp)->dst.u3.all), ntohs((tp)->dst.u.all))
121 /* If we're the first tuple, it's the original dir. */
122 #define NF_CT_DIRECTION(h) \
123 ((enum ip_conntrack_dir)(h)->tuple.dst.dir)
125 /* Connections have two entries in the hash table: one for each way */
126 struct nf_conntrack_tuple_hash
128 struct list_head list;
130 struct nf_conntrack_tuple tuple;
133 #endif /* __KERNEL__ */
135 static inline int nf_ct_tuple_src_equal(const struct nf_conntrack_tuple *t1,
136 const struct nf_conntrack_tuple *t2)
138 return (t1->src.u3.all[0] == t2->src.u3.all[0] &&
139 t1->src.u3.all[1] == t2->src.u3.all[1] &&
140 t1->src.u3.all[2] == t2->src.u3.all[2] &&
141 t1->src.u3.all[3] == t2->src.u3.all[3] &&
142 t1->src.u.all == t2->src.u.all &&
143 t1->src.l3num == t2->src.l3num &&
144 t1->dst.protonum == t2->dst.protonum);
147 static inline int nf_ct_tuple_dst_equal(const struct nf_conntrack_tuple *t1,
148 const struct nf_conntrack_tuple *t2)
150 return (t1->dst.u3.all[0] == t2->dst.u3.all[0] &&
151 t1->dst.u3.all[1] == t2->dst.u3.all[1] &&
152 t1->dst.u3.all[2] == t2->dst.u3.all[2] &&
153 t1->dst.u3.all[3] == t2->dst.u3.all[3] &&
154 t1->dst.u.all == t2->dst.u.all &&
155 t1->src.l3num == t2->src.l3num &&
156 t1->dst.protonum == t2->dst.protonum);
159 static inline int nf_ct_tuple_equal(const struct nf_conntrack_tuple *t1,
160 const struct nf_conntrack_tuple *t2)
162 return nf_ct_tuple_src_equal(t1, t2) && nf_ct_tuple_dst_equal(t1, t2);
165 static inline int nf_ct_tuple_mask_cmp(const struct nf_conntrack_tuple *t,
166 const struct nf_conntrack_tuple *tuple,
167 const struct nf_conntrack_tuple *mask)
171 for (count = 0; count < NF_CT_TUPLE_L3SIZE; count++){
172 if ((t->src.u3.all[count] ^ tuple->src.u3.all[count]) &
173 mask->src.u3.all[count])
177 for (count = 0; count < NF_CT_TUPLE_L3SIZE; count++){
178 if ((t->dst.u3.all[count] ^ tuple->dst.u3.all[count]) &
179 mask->dst.u3.all[count])
183 if ((t->src.u.all ^ tuple->src.u.all) & mask->src.u.all ||
184 (t->dst.u.all ^ tuple->dst.u.all) & mask->dst.u.all ||
185 (t->src.l3num ^ tuple->src.l3num) & mask->src.l3num ||
186 (t->dst.protonum ^ tuple->dst.protonum) & mask->dst.protonum)
192 #endif /* _NF_CONNTRACK_TUPLE_H */