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 manipulable part of the tuple. */
28 struct nf_conntrack_man {
29 union nf_inet_addr u3;
30 union nf_conntrack_man_proto u;
31 /* Layer 3 protocol */
35 /* This contains the information to distinguish a connection. */
36 struct nf_conntrack_tuple {
37 struct nf_conntrack_man src;
39 /* These are the parts of the tuple which are fixed. */
41 union nf_inet_addr u3;
43 /* Add other protocols here. */
69 /* The direction (for tuplehash) */
74 struct nf_conntrack_tuple_mask {
76 union nf_inet_addr u3;
77 union nf_conntrack_man_proto u;
81 static inline void nf_ct_dump_tuple_ip(const struct nf_conntrack_tuple *t)
84 printk("tuple %p: %u %pI4:%hu -> %pI4:%hu\n",
86 &t->src.u3.ip, ntohs(t->src.u.all),
87 &t->dst.u3.ip, ntohs(t->dst.u.all));
91 static inline void nf_ct_dump_tuple_ipv6(const struct nf_conntrack_tuple *t)
94 printk("tuple %p: %u %pI6 %hu -> %pI6 %hu\n",
96 t->src.u3.all, ntohs(t->src.u.all),
97 t->dst.u3.all, ntohs(t->dst.u.all));
101 static inline void nf_ct_dump_tuple(const struct nf_conntrack_tuple *t)
103 switch (t->src.l3num) {
105 nf_ct_dump_tuple_ip(t);
108 nf_ct_dump_tuple_ipv6(t);
113 /* If we're the first tuple, it's the original dir. */
114 #define NF_CT_DIRECTION(h) \
115 ((enum ip_conntrack_dir)(h)->tuple.dst.dir)
117 /* Connections have two entries in the hash table: one for each way */
118 struct nf_conntrack_tuple_hash {
119 struct hlist_nulls_node hnnode;
120 struct nf_conntrack_tuple tuple;
123 static inline bool __nf_ct_tuple_src_equal(const struct nf_conntrack_tuple *t1,
124 const struct nf_conntrack_tuple *t2)
126 return (nf_inet_addr_cmp(&t1->src.u3, &t2->src.u3) &&
127 t1->src.u.all == t2->src.u.all &&
128 t1->src.l3num == t2->src.l3num);
131 static inline bool __nf_ct_tuple_dst_equal(const struct nf_conntrack_tuple *t1,
132 const struct nf_conntrack_tuple *t2)
134 return (nf_inet_addr_cmp(&t1->dst.u3, &t2->dst.u3) &&
135 t1->dst.u.all == t2->dst.u.all &&
136 t1->dst.protonum == t2->dst.protonum);
139 static inline bool nf_ct_tuple_equal(const struct nf_conntrack_tuple *t1,
140 const struct nf_conntrack_tuple *t2)
142 return __nf_ct_tuple_src_equal(t1, t2) &&
143 __nf_ct_tuple_dst_equal(t1, t2);
147 nf_ct_tuple_mask_equal(const struct nf_conntrack_tuple_mask *m1,
148 const struct nf_conntrack_tuple_mask *m2)
150 return (nf_inet_addr_cmp(&m1->src.u3, &m2->src.u3) &&
151 m1->src.u.all == m2->src.u.all);
155 nf_ct_tuple_src_mask_cmp(const struct nf_conntrack_tuple *t1,
156 const struct nf_conntrack_tuple *t2,
157 const struct nf_conntrack_tuple_mask *mask)
161 for (count = 0; count < NF_CT_TUPLE_L3SIZE; count++) {
162 if ((t1->src.u3.all[count] ^ t2->src.u3.all[count]) &
163 mask->src.u3.all[count])
167 if ((t1->src.u.all ^ t2->src.u.all) & mask->src.u.all)
170 if (t1->src.l3num != t2->src.l3num ||
171 t1->dst.protonum != t2->dst.protonum)
178 nf_ct_tuple_mask_cmp(const struct nf_conntrack_tuple *t,
179 const struct nf_conntrack_tuple *tuple,
180 const struct nf_conntrack_tuple_mask *mask)
182 return nf_ct_tuple_src_mask_cmp(t, tuple, mask) &&
183 __nf_ct_tuple_dst_equal(t, tuple);
186 #endif /* _NF_CONNTRACK_TUPLE_H */