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/x_tables.h>
14 #include <linux/netfilter/nf_conntrack_tuple_common.h>
15 #include <linux/list_nulls.h>
17 /* A `tuple' is a structure containing the information to uniquely
18 identify a connection. ie. if two packets have the same tuple, they
19 are in the same connection; if not, they are not.
21 We divide the structure along "manipulatable" and
22 "non-manipulatable" lines, for the benefit of the NAT code.
25 #define NF_CT_TUPLE_L3SIZE ARRAY_SIZE(((union nf_inet_addr *)NULL)->all)
27 /* The protocol-specific manipulable parts of the tuple: always in
29 union nf_conntrack_man_proto {
30 /* Add other protocols here. */
49 __be16 key; /* GRE key is 32bit, PPtP only uses 16bit */
53 /* The manipulable part of the tuple. */
54 struct nf_conntrack_man {
55 union nf_inet_addr u3;
56 union nf_conntrack_man_proto u;
57 /* Layer 3 protocol */
61 /* This contains the information to distinguish a connection. */
62 struct nf_conntrack_tuple {
63 struct nf_conntrack_man src;
65 /* These are the parts of the tuple which are fixed. */
67 union nf_inet_addr u3;
69 /* Add other protocols here. */
95 /* The direction (for tuplehash) */
100 struct nf_conntrack_tuple_mask {
102 union nf_inet_addr u3;
103 union nf_conntrack_man_proto u;
107 static inline void nf_ct_dump_tuple_ip(const struct nf_conntrack_tuple *t)
110 printk("tuple %p: %u %pI4:%hu -> %pI4:%hu\n",
112 &t->src.u3.ip, ntohs(t->src.u.all),
113 &t->dst.u3.ip, ntohs(t->dst.u.all));
117 static inline void nf_ct_dump_tuple_ipv6(const struct nf_conntrack_tuple *t)
120 printk("tuple %p: %u %pI6 %hu -> %pI6 %hu\n",
122 t->src.u3.all, ntohs(t->src.u.all),
123 t->dst.u3.all, ntohs(t->dst.u.all));
127 static inline void nf_ct_dump_tuple(const struct nf_conntrack_tuple *t)
129 switch (t->src.l3num) {
131 nf_ct_dump_tuple_ip(t);
134 nf_ct_dump_tuple_ipv6(t);
139 /* If we're the first tuple, it's the original dir. */
140 #define NF_CT_DIRECTION(h) \
141 ((enum ip_conntrack_dir)(h)->tuple.dst.dir)
143 /* Connections have two entries in the hash table: one for each way */
144 struct nf_conntrack_tuple_hash {
145 struct hlist_nulls_node hnnode;
146 struct nf_conntrack_tuple tuple;
149 static inline bool __nf_ct_tuple_src_equal(const struct nf_conntrack_tuple *t1,
150 const struct nf_conntrack_tuple *t2)
152 return (nf_inet_addr_cmp(&t1->src.u3, &t2->src.u3) &&
153 t1->src.u.all == t2->src.u.all &&
154 t1->src.l3num == t2->src.l3num);
157 static inline bool __nf_ct_tuple_dst_equal(const struct nf_conntrack_tuple *t1,
158 const struct nf_conntrack_tuple *t2)
160 return (nf_inet_addr_cmp(&t1->dst.u3, &t2->dst.u3) &&
161 t1->dst.u.all == t2->dst.u.all &&
162 t1->dst.protonum == t2->dst.protonum);
165 static inline bool nf_ct_tuple_equal(const struct nf_conntrack_tuple *t1,
166 const struct nf_conntrack_tuple *t2)
168 return __nf_ct_tuple_src_equal(t1, t2) &&
169 __nf_ct_tuple_dst_equal(t1, t2);
173 nf_ct_tuple_mask_equal(const struct nf_conntrack_tuple_mask *m1,
174 const struct nf_conntrack_tuple_mask *m2)
176 return (nf_inet_addr_cmp(&m1->src.u3, &m2->src.u3) &&
177 m1->src.u.all == m2->src.u.all);
181 nf_ct_tuple_src_mask_cmp(const struct nf_conntrack_tuple *t1,
182 const struct nf_conntrack_tuple *t2,
183 const struct nf_conntrack_tuple_mask *mask)
187 for (count = 0; count < NF_CT_TUPLE_L3SIZE; count++) {
188 if ((t1->src.u3.all[count] ^ t2->src.u3.all[count]) &
189 mask->src.u3.all[count])
193 if ((t1->src.u.all ^ t2->src.u.all) & mask->src.u.all)
196 if (t1->src.l3num != t2->src.l3num ||
197 t1->dst.protonum != t2->dst.protonum)
204 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 */