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gerrit-public.fairphone.software / kernel / msm-4.9 / 997ae831ade74bdaed4172b1c02060b9efd6e206 / . / include / linux / netfilter / nf_conntrack_common.h
blob: d2e4bd7a7a1423b9c23a12f4e048cc89cb391b3a [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),
Eric Leblond997ae832006-05-29 18:24:20 -0700[diff] [blame^]72
73 /* Connection has fixed timeout. */
74 IPS_FIXED_TIMEOUT_BIT = 10,
75 IPS_FIXED_TIMEOUT = (1 << IPS_FIXED_TIMEOUT_BIT),
Yasuyuki Kozakai9fb9cbb2005-11-09 16:38:16 -0800[diff] [blame]76};
77
78/* Connection tracking event bits */
79enum ip_conntrack_events
80{
81 /* New conntrack */
82 IPCT_NEW_BIT = 0,
83 IPCT_NEW = (1 << IPCT_NEW_BIT),
84
85 /* Expected connection */
86 IPCT_RELATED_BIT = 1,
87 IPCT_RELATED = (1 << IPCT_RELATED_BIT),
88
89 /* Destroyed conntrack */
90 IPCT_DESTROY_BIT = 2,
91 IPCT_DESTROY = (1 << IPCT_DESTROY_BIT),
92
93 /* Timer has been refreshed */
94 IPCT_REFRESH_BIT = 3,
95 IPCT_REFRESH = (1 << IPCT_REFRESH_BIT),
96
97 /* Status has changed */
98 IPCT_STATUS_BIT = 4,
99 IPCT_STATUS = (1 << IPCT_STATUS_BIT),
100
101 /* Update of protocol info */
102 IPCT_PROTOINFO_BIT = 5,
103 IPCT_PROTOINFO = (1 << IPCT_PROTOINFO_BIT),
104
105 /* Volatile protocol info */
106 IPCT_PROTOINFO_VOLATILE_BIT = 6,
107 IPCT_PROTOINFO_VOLATILE = (1 << IPCT_PROTOINFO_VOLATILE_BIT),
108
109 /* New helper for conntrack */
110 IPCT_HELPER_BIT = 7,
111 IPCT_HELPER = (1 << IPCT_HELPER_BIT),
112
113 /* Update of helper info */
114 IPCT_HELPINFO_BIT = 8,
115 IPCT_HELPINFO = (1 << IPCT_HELPINFO_BIT),
116
117 /* Volatile helper info */
118 IPCT_HELPINFO_VOLATILE_BIT = 9,
119 IPCT_HELPINFO_VOLATILE = (1 << IPCT_HELPINFO_VOLATILE_BIT),
120
121 /* NAT info */
122 IPCT_NATINFO_BIT = 10,
123 IPCT_NATINFO = (1 << IPCT_NATINFO_BIT),
124
125 /* Counter highest bit has been set */
126 IPCT_COUNTER_FILLING_BIT = 11,
127 IPCT_COUNTER_FILLING = (1 << IPCT_COUNTER_FILLING_BIT),
128};
129
130enum ip_conntrack_expect_events {
131 IPEXP_NEW_BIT = 0,
132 IPEXP_NEW = (1 << IPEXP_NEW_BIT),
133};
134
135#ifdef __KERNEL__
136struct ip_conntrack_counter
137{
138 u_int32_t packets;
139 u_int32_t bytes;
140};
141
142struct ip_conntrack_stat
143{
144 unsigned int searched;
145 unsigned int found;
146 unsigned int new;
147 unsigned int invalid;
148 unsigned int ignore;
149 unsigned int delete;
150 unsigned int delete_list;
151 unsigned int insert;
152 unsigned int insert_failed;
153 unsigned int drop;
154 unsigned int early_drop;
155 unsigned int error;
156 unsigned int expect_new;
157 unsigned int expect_create;
158 unsigned int expect_delete;
159};
160
Harald Welte2e4e6a12006-01-12 13:30:04 -0800[diff] [blame]161/* call to create an explicit dependency on nf_conntrack. */
162extern void need_conntrack(void);
163
Yasuyuki Kozakai9fb9cbb2005-11-09 16:38:16 -0800[diff] [blame]164#endif /* __KERNEL__ */
165
166#endif /* _NF_CONNTRACK_COMMON_H */