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
;
109 static inline void nf_ct_dump_tuple_ip(const struct nf_conntrack_tuple
*t
)
112 printk("tuple %p: %u %pI4:%hu -> %pI4:%hu\n",
114 &t
->src
.u3
.ip
, ntohs(t
->src
.u
.all
),
115 &t
->dst
.u3
.ip
, ntohs(t
->dst
.u
.all
));
119 static inline void nf_ct_dump_tuple_ipv6(const struct nf_conntrack_tuple
*t
)
122 printk("tuple %p: %u %pI6 %hu -> %pI6 %hu\n",
124 t
->src
.u3
.all
, ntohs(t
->src
.u
.all
),
125 t
->dst
.u3
.all
, ntohs(t
->dst
.u
.all
));
129 static inline void nf_ct_dump_tuple(const struct nf_conntrack_tuple
*t
)
131 switch (t
->src
.l3num
) {
133 nf_ct_dump_tuple_ip(t
);
136 nf_ct_dump_tuple_ipv6(t
);
141 /* If we're the first tuple, it's the original dir. */
142 #define NF_CT_DIRECTION(h) \
143 ((enum ip_conntrack_dir)(h)->tuple.dst.dir)
145 /* Connections have two entries in the hash table: one for each way */
146 struct nf_conntrack_tuple_hash
{
147 struct hlist_nulls_node hnnode
;
148 struct nf_conntrack_tuple tuple
;
151 #endif /* __KERNEL__ */
153 static inline bool __nf_ct_tuple_src_equal(const struct nf_conntrack_tuple
*t1
,
154 const struct nf_conntrack_tuple
*t2
)
156 return (nf_inet_addr_cmp(&t1
->src
.u3
, &t2
->src
.u3
) &&
157 t1
->src
.u
.all
== t2
->src
.u
.all
&&
158 t1
->src
.l3num
== t2
->src
.l3num
);
161 static inline bool __nf_ct_tuple_dst_equal(const struct nf_conntrack_tuple
*t1
,
162 const struct nf_conntrack_tuple
*t2
)
164 return (nf_inet_addr_cmp(&t1
->dst
.u3
, &t2
->dst
.u3
) &&
165 t1
->dst
.u
.all
== t2
->dst
.u
.all
&&
166 t1
->dst
.protonum
== t2
->dst
.protonum
);
169 static inline bool nf_ct_tuple_equal(const struct nf_conntrack_tuple
*t1
,
170 const struct nf_conntrack_tuple
*t2
)
172 return __nf_ct_tuple_src_equal(t1
, t2
) &&
173 __nf_ct_tuple_dst_equal(t1
, t2
);
177 nf_ct_tuple_mask_equal(const struct nf_conntrack_tuple_mask
*m1
,
178 const struct nf_conntrack_tuple_mask
*m2
)
180 return (nf_inet_addr_cmp(&m1
->src
.u3
, &m2
->src
.u3
) &&
181 m1
->src
.u
.all
== m2
->src
.u
.all
);
185 nf_ct_tuple_src_mask_cmp(const struct nf_conntrack_tuple
*t1
,
186 const struct nf_conntrack_tuple
*t2
,
187 const struct nf_conntrack_tuple_mask
*mask
)
191 for (count
= 0; count
< NF_CT_TUPLE_L3SIZE
; count
++) {
192 if ((t1
->src
.u3
.all
[count
] ^ t2
->src
.u3
.all
[count
]) &
193 mask
->src
.u3
.all
[count
])
197 if ((t1
->src
.u
.all
^ t2
->src
.u
.all
) & mask
->src
.u
.all
)
200 if (t1
->src
.l3num
!= t2
->src
.l3num
||
201 t1
->dst
.protonum
!= t2
->dst
.protonum
)
208 nf_ct_tuple_mask_cmp(const struct nf_conntrack_tuple
*t
,
209 const struct nf_conntrack_tuple
*tuple
,
210 const struct nf_conntrack_tuple_mask
*mask
)
212 return nf_ct_tuple_src_mask_cmp(t
, tuple
, mask
) &&
213 __nf_ct_tuple_dst_equal(t
, tuple
);
216 #endif /* _NF_CONNTRACK_TUPLE_H */