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 struct nf_conntrack_tuple_mask
106 union nf_conntrack_address u3;
107 union nf_conntrack_man_proto u;
111 /* This is optimized opposed to a memset of the whole structure. Everything we
112 * really care about is the source/destination unions */
113 #define NF_CT_TUPLE_U_BLANK(tuple) \
115 (tuple)->src.u.all = 0; \
116 (tuple)->dst.u.all = 0; \
117 memset(&(tuple)->src.u3, 0, sizeof((tuple)->src.u3)); \
118 memset(&(tuple)->dst.u3, 0, sizeof((tuple)->dst.u3)); \
123 #define NF_CT_DUMP_TUPLE(tp) \
124 pr_debug("tuple %p: %u %u " NIP6_FMT " %hu -> " NIP6_FMT " %hu\n", \
125 (tp), (tp)->src.l3num, (tp)->dst.protonum, \
126 NIP6(*(struct in6_addr *)(tp)->src.u3.all), ntohs((tp)->src.u.all), \
127 NIP6(*(struct in6_addr *)(tp)->dst.u3.all), ntohs((tp)->dst.u.all))
129 /* If we're the first tuple, it's the original dir. */
130 #define NF_CT_DIRECTION(h) \
131 ((enum ip_conntrack_dir)(h)->tuple.dst.dir)
133 /* Connections have two entries in the hash table: one for each way */
134 struct nf_conntrack_tuple_hash
136 struct hlist_node hnode;
137 struct nf_conntrack_tuple tuple;
140 #endif /* __KERNEL__ */
142 static inline int nf_ct_tuple_src_equal(const struct nf_conntrack_tuple *t1,
143 const struct nf_conntrack_tuple *t2)
145 return (t1->src.u3.all[0] == t2->src.u3.all[0] &&
146 t1->src.u3.all[1] == t2->src.u3.all[1] &&
147 t1->src.u3.all[2] == t2->src.u3.all[2] &&
148 t1->src.u3.all[3] == t2->src.u3.all[3] &&
149 t1->src.u.all == t2->src.u.all &&
150 t1->src.l3num == t2->src.l3num &&
151 t1->dst.protonum == t2->dst.protonum);
154 static inline int nf_ct_tuple_dst_equal(const struct nf_conntrack_tuple *t1,
155 const struct nf_conntrack_tuple *t2)
157 return (t1->dst.u3.all[0] == t2->dst.u3.all[0] &&
158 t1->dst.u3.all[1] == t2->dst.u3.all[1] &&
159 t1->dst.u3.all[2] == t2->dst.u3.all[2] &&
160 t1->dst.u3.all[3] == t2->dst.u3.all[3] &&
161 t1->dst.u.all == t2->dst.u.all &&
162 t1->src.l3num == t2->src.l3num &&
163 t1->dst.protonum == t2->dst.protonum);
166 static inline int nf_ct_tuple_equal(const struct nf_conntrack_tuple *t1,
167 const struct nf_conntrack_tuple *t2)
169 return nf_ct_tuple_src_equal(t1, t2) && nf_ct_tuple_dst_equal(t1, t2);
172 static inline int nf_ct_tuple_mask_equal(const struct nf_conntrack_tuple_mask *m1,
173 const struct nf_conntrack_tuple_mask *m2)
175 return (m1->src.u3.all[0] == m2->src.u3.all[0] &&
176 m1->src.u3.all[1] == m2->src.u3.all[1] &&
177 m1->src.u3.all[2] == m2->src.u3.all[2] &&
178 m1->src.u3.all[3] == m2->src.u3.all[3] &&
179 m1->src.u.all == m2->src.u.all);
182 static inline int nf_ct_tuple_src_mask_cmp(const struct nf_conntrack_tuple *t1,
183 const struct nf_conntrack_tuple *t2,
184 const struct nf_conntrack_tuple_mask *mask)
188 for (count = 0; count < NF_CT_TUPLE_L3SIZE; count++) {
189 if ((t1->src.u3.all[count] ^ t2->src.u3.all[count]) &
190 mask->src.u3.all[count])
194 if ((t1->src.u.all ^ t2->src.u.all) & mask->src.u.all)
197 if (t1->src.l3num != t2->src.l3num ||
198 t1->dst.protonum != t2->dst.protonum)
204 static inline int nf_ct_tuple_mask_cmp(const struct nf_conntrack_tuple *t,
205 const struct nf_conntrack_tuple *tuple,
206 const struct nf_conntrack_tuple_mask *mask)
208 return nf_ct_tuple_src_mask_cmp(t, tuple, mask) &&
209 nf_ct_tuple_dst_equal(t, tuple);
212 #endif /* _NF_CONNTRACK_TUPLE_H */