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gerrit-public.fairphone.software / kernel / msm-4.9 / 2e4e6a17af35be359cc8f1c924f8f198fbd478cc / . / include / linux / netfilter / nf_conntrack_common.h
blob: 3ff88c8783083fc620a880ecfbdb44d7840cc8f2 [file] [log] [blame]
Yasuyuki Kozakai9fb9cbb2005-11-09 16:38:16 -0800[diff] [blame]1#ifndef _NF_CONNTRACK_COMMON_H
2#define _NF_CONNTRACK_COMMON_H
3/* Connection state tracking for netfilter. This is separated from,
4 but required by, the NAT layer; it can also be used by an iptables
5 extension. */
6enum ip_conntrack_info
7{
8 /* Part of an established connection (either direction). */
9 IP_CT_ESTABLISHED,
10
11 /* Like NEW, but related to an existing connection, or ICMP error
12 (in either direction). */
13 IP_CT_RELATED,
14
15 /* Started a new connection to track (only
16 IP_CT_DIR_ORIGINAL); may be a retransmission. */
17 IP_CT_NEW,
18
19 /* >= this indicates reply direction */
20 IP_CT_IS_REPLY,
21
22 /* Number of distinct IP_CT types (no NEW in reply dirn). */
23 IP_CT_NUMBER = IP_CT_IS_REPLY * 2 - 1
24};
25
26/* Bitset representing status of connection. */
27enum ip_conntrack_status {
28 /* It's an expected connection: bit 0 set. This bit never changed */
29 IPS_EXPECTED_BIT = 0,
30 IPS_EXPECTED = (1 << IPS_EXPECTED_BIT),
31
32 /* We've seen packets both ways: bit 1 set. Can be set, not unset. */
33 IPS_SEEN_REPLY_BIT = 1,
34 IPS_SEEN_REPLY = (1 << IPS_SEEN_REPLY_BIT),
35
36 /* Conntrack should never be early-expired. */
37 IPS_ASSURED_BIT = 2,
38 IPS_ASSURED = (1 << IPS_ASSURED_BIT),
39
40 /* Connection is confirmed: originating packet has left box */
41 IPS_CONFIRMED_BIT = 3,
42 IPS_CONFIRMED = (1 << IPS_CONFIRMED_BIT),
43
44 /* Connection needs src nat in orig dir. This bit never changed. */
45 IPS_SRC_NAT_BIT = 4,
46 IPS_SRC_NAT = (1 << IPS_SRC_NAT_BIT),
47
48 /* Connection needs dst nat in orig dir. This bit never changed. */
49 IPS_DST_NAT_BIT = 5,
50 IPS_DST_NAT = (1 << IPS_DST_NAT_BIT),
51
52 /* Both together. */
53 IPS_NAT_MASK = (IPS_DST_NAT | IPS_SRC_NAT),
54
55 /* Connection needs TCP sequence adjusted. */
56 IPS_SEQ_ADJUST_BIT = 6,
57 IPS_SEQ_ADJUST = (1 << IPS_SEQ_ADJUST_BIT),
58
59 /* NAT initialization bits. */
60 IPS_SRC_NAT_DONE_BIT = 7,
61 IPS_SRC_NAT_DONE = (1 << IPS_SRC_NAT_DONE_BIT),
62
63 IPS_DST_NAT_DONE_BIT = 8,
64 IPS_DST_NAT_DONE = (1 << IPS_DST_NAT_DONE_BIT),
65
66 /* Both together */
67 IPS_NAT_DONE_MASK = (IPS_DST_NAT_DONE | IPS_SRC_NAT_DONE),
68
69 /* Connection is dying (removed from lists), can not be unset. */
70 IPS_DYING_BIT = 9,
71 IPS_DYING = (1 << IPS_DYING_BIT),
72};
73
74/* Connection tracking event bits */
75enum ip_conntrack_events
76{
77 /* New conntrack */
78 IPCT_NEW_BIT = 0,
79 IPCT_NEW = (1 << IPCT_NEW_BIT),
80
81 /* Expected connection */
82 IPCT_RELATED_BIT = 1,
83 IPCT_RELATED = (1 << IPCT_RELATED_BIT),
84
85 /* Destroyed conntrack */
86 IPCT_DESTROY_BIT = 2,
87 IPCT_DESTROY = (1 << IPCT_DESTROY_BIT),
88
89 /* Timer has been refreshed */
90 IPCT_REFRESH_BIT = 3,
91 IPCT_REFRESH = (1 << IPCT_REFRESH_BIT),
92
93 /* Status has changed */
94 IPCT_STATUS_BIT = 4,
95 IPCT_STATUS = (1 << IPCT_STATUS_BIT),
96
97 /* Update of protocol info */
98 IPCT_PROTOINFO_BIT = 5,
99 IPCT_PROTOINFO = (1 << IPCT_PROTOINFO_BIT),
100
101 /* Volatile protocol info */
102 IPCT_PROTOINFO_VOLATILE_BIT = 6,
103 IPCT_PROTOINFO_VOLATILE = (1 << IPCT_PROTOINFO_VOLATILE_BIT),
104
105 /* New helper for conntrack */
106 IPCT_HELPER_BIT = 7,
107 IPCT_HELPER = (1 << IPCT_HELPER_BIT),
108
109 /* Update of helper info */
110 IPCT_HELPINFO_BIT = 8,
111 IPCT_HELPINFO = (1 << IPCT_HELPINFO_BIT),
112
113 /* Volatile helper info */
114 IPCT_HELPINFO_VOLATILE_BIT = 9,
115 IPCT_HELPINFO_VOLATILE = (1 << IPCT_HELPINFO_VOLATILE_BIT),
116
117 /* NAT info */
118 IPCT_NATINFO_BIT = 10,
119 IPCT_NATINFO = (1 << IPCT_NATINFO_BIT),
120
121 /* Counter highest bit has been set */
122 IPCT_COUNTER_FILLING_BIT = 11,
123 IPCT_COUNTER_FILLING = (1 << IPCT_COUNTER_FILLING_BIT),
124};
125
126enum ip_conntrack_expect_events {
127 IPEXP_NEW_BIT = 0,
128 IPEXP_NEW = (1 << IPEXP_NEW_BIT),
129};
130
131#ifdef __KERNEL__
132struct ip_conntrack_counter
133{
134 u_int32_t packets;
135 u_int32_t bytes;
136};
137
138struct ip_conntrack_stat
139{
140 unsigned int searched;
141 unsigned int found;
142 unsigned int new;
143 unsigned int invalid;
144 unsigned int ignore;
145 unsigned int delete;
146 unsigned int delete_list;
147 unsigned int insert;
148 unsigned int insert_failed;
149 unsigned int drop;
150 unsigned int early_drop;
151 unsigned int error;
152 unsigned int expect_new;
153 unsigned int expect_create;
154 unsigned int expect_delete;
155};
156
Harald Welte2e4e6a12006-01-12 13:30:04 -0800[diff] [blame^]157/* call to create an explicit dependency on nf_conntrack. */
158extern void need_conntrack(void);
159
Yasuyuki Kozakai9fb9cbb2005-11-09 16:38:16 -0800[diff] [blame]160#endif /* __KERNEL__ */
161
162#endif /* _NF_CONNTRACK_COMMON_H */