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. */
46 __be16 key; /* GRE key is 32bit, PPtP only uses 16bit */
50 /* The manipulable part of the tuple. */
51 struct nf_conntrack_man
53 union nf_inet_addr u3;
54 union nf_conntrack_man_proto u;
55 /* Layer 3 protocol */
59 /* This contains the information to distinguish a connection. */
60 struct nf_conntrack_tuple
62 struct nf_conntrack_man src;
64 /* These are the parts of the tuple which are fixed. */
66 union nf_inet_addr u3;
68 /* Add other protocols here. */
91 /* The direction (for tuplehash) */
96 struct nf_conntrack_tuple_mask
99 union nf_inet_addr u3;
100 union nf_conntrack_man_proto u;
104 /* This is optimized opposed to a memset of the whole structure. Everything we
105 * really care about is the source/destination unions */
106 #define NF_CT_TUPLE_U_BLANK(tuple) \
108 (tuple)->src.u.all = 0; \
109 (tuple)->dst.u.all = 0; \
110 memset(&(tuple)->src.u3, 0, sizeof((tuple)->src.u3)); \
111 memset(&(tuple)->dst.u3, 0, sizeof((tuple)->dst.u3)); \
116 static inline void nf_ct_dump_tuple_ip(const struct nf_conntrack_tuple *t)
119 printk("tuple %p: %u " NIPQUAD_FMT ":%hu -> " NIPQUAD_FMT ":%hu\n",
121 NIPQUAD(t->src.u3.ip), ntohs(t->src.u.all),
122 NIPQUAD(t->dst.u3.ip), ntohs(t->dst.u.all));
126 static inline void nf_ct_dump_tuple_ipv6(const struct nf_conntrack_tuple *t)
129 printk("tuple %p: %u " NIP6_FMT " %hu -> " NIP6_FMT " %hu\n",
131 NIP6(*(struct in6_addr *)t->src.u3.all), ntohs(t->src.u.all),
132 NIP6(*(struct in6_addr *)t->dst.u3.all), ntohs(t->dst.u.all));
136 static inline void nf_ct_dump_tuple(const struct nf_conntrack_tuple *t)
138 switch (t->src.l3num) {
140 nf_ct_dump_tuple_ip(t);
143 nf_ct_dump_tuple_ipv6(t);
148 #define NF_CT_DUMP_TUPLE(tp) nf_ct_dump_tuple(tp)
150 /* If we're the first tuple, it's the original dir. */
151 #define NF_CT_DIRECTION(h) \
152 ((enum ip_conntrack_dir)(h)->tuple.dst.dir)
154 /* Connections have two entries in the hash table: one for each way */
155 struct nf_conntrack_tuple_hash
157 struct hlist_node hnode;
158 struct nf_conntrack_tuple tuple;
161 #endif /* __KERNEL__ */
163 static inline int __nf_ct_tuple_src_equal(const struct nf_conntrack_tuple *t1,
164 const struct nf_conntrack_tuple *t2)
166 return (t1->src.u3.all[0] == t2->src.u3.all[0] &&
167 t1->src.u3.all[1] == t2->src.u3.all[1] &&
168 t1->src.u3.all[2] == t2->src.u3.all[2] &&
169 t1->src.u3.all[3] == t2->src.u3.all[3] &&
170 t1->src.u.all == t2->src.u.all &&
171 t1->src.l3num == t2->src.l3num);
174 static inline int __nf_ct_tuple_dst_equal(const struct nf_conntrack_tuple *t1,
175 const struct nf_conntrack_tuple *t2)
177 return (t1->dst.u3.all[0] == t2->dst.u3.all[0] &&
178 t1->dst.u3.all[1] == t2->dst.u3.all[1] &&
179 t1->dst.u3.all[2] == t2->dst.u3.all[2] &&
180 t1->dst.u3.all[3] == t2->dst.u3.all[3] &&
181 t1->dst.u.all == t2->dst.u.all &&
182 t1->dst.protonum == t2->dst.protonum);
185 static inline int nf_ct_tuple_equal(const struct nf_conntrack_tuple *t1,
186 const struct nf_conntrack_tuple *t2)
188 return __nf_ct_tuple_src_equal(t1, t2) &&
189 __nf_ct_tuple_dst_equal(t1, t2);
192 static inline int nf_ct_tuple_mask_equal(const struct nf_conntrack_tuple_mask *m1,
193 const struct nf_conntrack_tuple_mask *m2)
195 return (m1->src.u3.all[0] == m2->src.u3.all[0] &&
196 m1->src.u3.all[1] == m2->src.u3.all[1] &&
197 m1->src.u3.all[2] == m2->src.u3.all[2] &&
198 m1->src.u3.all[3] == m2->src.u3.all[3] &&
199 m1->src.u.all == m2->src.u.all);
202 static inline int nf_ct_tuple_src_mask_cmp(const struct nf_conntrack_tuple *t1,
203 const struct nf_conntrack_tuple *t2,
204 const struct nf_conntrack_tuple_mask *mask)
208 for (count = 0; count < NF_CT_TUPLE_L3SIZE; count++) {
209 if ((t1->src.u3.all[count] ^ t2->src.u3.all[count]) &
210 mask->src.u3.all[count])
214 if ((t1->src.u.all ^ t2->src.u.all) & mask->src.u.all)
217 if (t1->src.l3num != t2->src.l3num ||
218 t1->dst.protonum != t2->dst.protonum)
224 static inline int nf_ct_tuple_mask_cmp(const struct nf_conntrack_tuple *t,
225 const struct nf_conntrack_tuple *tuple,
226 const struct nf_conntrack_tuple_mask *mask)
228 return nf_ct_tuple_src_mask_cmp(t, tuple, mask) &&
229 __nf_ct_tuple_dst_equal(t, tuple);
232 #endif /* _NF_CONNTRACK_TUPLE_H */