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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. */ | |
6 | enum 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. */ | |
27 | enum 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 */ | |
75 | enum 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 | ||
126 | enum ip_conntrack_expect_events { | |
127 | IPEXP_NEW_BIT = 0, | |
128 | IPEXP_NEW = (1 << IPEXP_NEW_BIT), | |
129 | }; | |
130 | ||
131 | #ifdef __KERNEL__ | |
132 | struct ip_conntrack_counter | |
133 | { | |
134 | u_int32_t packets; | |
135 | u_int32_t bytes; | |
136 | }; | |
137 | ||
138 | struct 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 | ||
157 | #endif /* __KERNEL__ */ | |
158 | ||
159 | #endif /* _NF_CONNTRACK_COMMON_H */ |