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>
16 /* A `tuple' is a structure containing the information to uniquely
17 identify a connection. ie. if two packets have the same tuple, they
18 are in the same connection; if not, they are not.
20 We divide the structure along "manipulatable" and
21 "non-manipulatable" lines, for the benefit of the NAT code.
24 #define NF_CT_TUPLE_L3SIZE ARRAY_SIZE(((union nf_inet_addr *)NULL)->all)
26 /* The protocol-specific manipulable parts of the tuple: always in
28 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
56 union nf_inet_addr u3;
57 union nf_conntrack_man_proto u;
58 /* Layer 3 protocol */
62 /* This contains the information to distinguish a connection. */
63 struct nf_conntrack_tuple
65 struct nf_conntrack_man src;
67 /* These are the parts of the tuple which are fixed. */
69 union nf_inet_addr u3;
71 /* Add other protocols here. */
97 /* The direction (for tuplehash) */
102 struct nf_conntrack_tuple_mask
105 union nf_inet_addr u3;
106 union nf_conntrack_man_proto u;
112 static inline void nf_ct_dump_tuple_ip(const struct nf_conntrack_tuple *t)
115 printk("tuple %p: %u %pI4:%hu -> %pI4:%hu\n",
117 &t->src.u3.ip, ntohs(t->src.u.all),
118 &t->dst.u3.ip, ntohs(t->dst.u.all));
122 static inline void nf_ct_dump_tuple_ipv6(const struct nf_conntrack_tuple *t)
125 printk("tuple %p: %u %pI6 %hu -> %pI6 %hu\n",
127 t->src.u3.all, ntohs(t->src.u.all),
128 t->dst.u3.all, ntohs(t->dst.u.all));
132 static inline void nf_ct_dump_tuple(const struct nf_conntrack_tuple *t)
134 switch (t->src.l3num) {
136 nf_ct_dump_tuple_ip(t);
139 nf_ct_dump_tuple_ipv6(t);
144 /* If we're the first tuple, it's the original dir. */
145 #define NF_CT_DIRECTION(h) \
146 ((enum ip_conntrack_dir)(h)->tuple.dst.dir)
148 /* Connections have two entries in the hash table: one for each way */
149 struct nf_conntrack_tuple_hash
151 struct hlist_node hnode;
152 struct nf_conntrack_tuple tuple;
155 #endif /* __KERNEL__ */
157 static inline bool __nf_ct_tuple_src_equal(const struct nf_conntrack_tuple *t1,
158 const struct nf_conntrack_tuple *t2)
160 return (nf_inet_addr_cmp(&t1->src.u3, &t2->src.u3) &&
161 t1->src.u.all == t2->src.u.all &&
162 t1->src.l3num == t2->src.l3num);
165 static inline bool __nf_ct_tuple_dst_equal(const struct nf_conntrack_tuple *t1,
166 const struct nf_conntrack_tuple *t2)
168 return (nf_inet_addr_cmp(&t1->dst.u3, &t2->dst.u3) &&
169 t1->dst.u.all == t2->dst.u.all &&
170 t1->dst.protonum == t2->dst.protonum);
173 static inline bool nf_ct_tuple_equal(const struct nf_conntrack_tuple *t1,
174 const struct nf_conntrack_tuple *t2)
176 return __nf_ct_tuple_src_equal(t1, t2) &&
177 __nf_ct_tuple_dst_equal(t1, t2);
181 nf_ct_tuple_mask_equal(const struct nf_conntrack_tuple_mask *m1,
182 const struct nf_conntrack_tuple_mask *m2)
184 return (nf_inet_addr_cmp(&m1->src.u3, &m2->src.u3) &&
185 m1->src.u.all == m2->src.u.all);
189 nf_ct_tuple_src_mask_cmp(const struct nf_conntrack_tuple *t1,
190 const struct nf_conntrack_tuple *t2,
191 const struct nf_conntrack_tuple_mask *mask)
195 for (count = 0; count < NF_CT_TUPLE_L3SIZE; count++) {
196 if ((t1->src.u3.all[count] ^ t2->src.u3.all[count]) &
197 mask->src.u3.all[count])
201 if ((t1->src.u.all ^ t2->src.u.all) & mask->src.u.all)
204 if (t1->src.l3num != t2->src.l3num ||
205 t1->dst.protonum != t2->dst.protonum)
212 nf_ct_tuple_mask_cmp(const struct nf_conntrack_tuple *t,
213 const struct nf_conntrack_tuple *tuple,
214 const struct nf_conntrack_tuple_mask *mask)
216 return nf_ct_tuple_src_mask_cmp(t, tuple, mask) &&
217 __nf_ct_tuple_dst_equal(t, tuple);
220 #endif /* _NF_CONNTRACK_TUPLE_H */