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 #define NF_CT_DUMP_TUPLE(tp) \
117 pr_debug("tuple %p: %u %u " NIP6_FMT " %hu -> " NIP6_FMT " %hu\n", \
118 (tp), (tp)->src.l3num, (tp)->dst.protonum, \
119 NIP6(*(struct in6_addr *)(tp)->src.u3.all), ntohs((tp)->src.u.all), \
120 NIP6(*(struct in6_addr *)(tp)->dst.u3.all), ntohs((tp)->dst.u.all))
122 /* If we're the first tuple, it's the original dir. */
123 #define NF_CT_DIRECTION(h) \
124 ((enum ip_conntrack_dir)(h)->tuple.dst.dir)
126 /* Connections have two entries in the hash table: one for each way */
127 struct nf_conntrack_tuple_hash
129 struct hlist_node hnode;
130 struct nf_conntrack_tuple tuple;
133 #endif /* __KERNEL__ */
135 static inline int nf_ct_tuple_src_equal(const struct nf_conntrack_tuple *t1,
136 const struct nf_conntrack_tuple *t2)
138 return (t1->src.u3.all[0] == t2->src.u3.all[0] &&
139 t1->src.u3.all[1] == t2->src.u3.all[1] &&
140 t1->src.u3.all[2] == t2->src.u3.all[2] &&
141 t1->src.u3.all[3] == t2->src.u3.all[3] &&
142 t1->src.u.all == t2->src.u.all &&
143 t1->src.l3num == t2->src.l3num &&
144 t1->dst.protonum == t2->dst.protonum);
147 static inline int nf_ct_tuple_dst_equal(const struct nf_conntrack_tuple *t1,
148 const struct nf_conntrack_tuple *t2)
150 return (t1->dst.u3.all[0] == t2->dst.u3.all[0] &&
151 t1->dst.u3.all[1] == t2->dst.u3.all[1] &&
152 t1->dst.u3.all[2] == t2->dst.u3.all[2] &&
153 t1->dst.u3.all[3] == t2->dst.u3.all[3] &&
154 t1->dst.u.all == t2->dst.u.all &&
155 t1->src.l3num == t2->src.l3num &&
156 t1->dst.protonum == t2->dst.protonum);
159 static inline int nf_ct_tuple_equal(const struct nf_conntrack_tuple *t1,
160 const struct nf_conntrack_tuple *t2)
162 return nf_ct_tuple_src_equal(t1, t2) && nf_ct_tuple_dst_equal(t1, t2);
165 static inline int nf_ct_tuple_mask_equal(const struct nf_conntrack_tuple_mask *m1,
166 const struct nf_conntrack_tuple_mask *m2)
168 return (m1->src.u3.all[0] == m2->src.u3.all[0] &&
169 m1->src.u3.all[1] == m2->src.u3.all[1] &&
170 m1->src.u3.all[2] == m2->src.u3.all[2] &&
171 m1->src.u3.all[3] == m2->src.u3.all[3] &&
172 m1->src.u.all == m2->src.u.all);
175 static inline int nf_ct_tuple_src_mask_cmp(const struct nf_conntrack_tuple *t1,
176 const struct nf_conntrack_tuple *t2,
177 const struct nf_conntrack_tuple_mask *mask)
181 for (count = 0; count < NF_CT_TUPLE_L3SIZE; count++) {
182 if ((t1->src.u3.all[count] ^ t2->src.u3.all[count]) &
183 mask->src.u3.all[count])
187 if ((t1->src.u.all ^ t2->src.u.all) & mask->src.u.all)
190 if (t1->src.l3num != t2->src.l3num ||
191 t1->dst.protonum != t2->dst.protonum)
197 static inline int nf_ct_tuple_mask_cmp(const struct nf_conntrack_tuple *t,
198 const struct nf_conntrack_tuple *tuple,
199 const struct nf_conntrack_tuple_mask *mask)
201 return nf_ct_tuple_src_mask_cmp(t, tuple, mask) &&
202 nf_ct_tuple_dst_equal(t, tuple);
205 #endif /* _NF_CONNTRACK_TUPLE_H */