Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 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. */ |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 6 | enum ip_conntrack_info { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 7 | /* Part of an established connection (either direction). */ |
| 8 | IP_CT_ESTABLISHED, |
| 9 | |
| 10 | /* Like NEW, but related to an existing connection, or ICMP error |
| 11 | (in either direction). */ |
| 12 | IP_CT_RELATED, |
| 13 | |
| 14 | /* Started a new connection to track (only |
| 15 | IP_CT_DIR_ORIGINAL); may be a retransmission. */ |
| 16 | IP_CT_NEW, |
| 17 | |
| 18 | /* >= this indicates reply direction */ |
| 19 | IP_CT_IS_REPLY, |
| 20 | |
Eric Dumazet | fb04883 | 2011-05-19 15:44:27 +0200 | [diff] [blame] | 21 | IP_CT_ESTABLISHED_REPLY = IP_CT_ESTABLISHED + IP_CT_IS_REPLY, |
| 22 | IP_CT_RELATED_REPLY = IP_CT_RELATED + IP_CT_IS_REPLY, |
| 23 | IP_CT_NEW_REPLY = IP_CT_NEW + IP_CT_IS_REPLY, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 24 | /* Number of distinct IP_CT types (no NEW in reply dirn). */ |
| 25 | IP_CT_NUMBER = IP_CT_IS_REPLY * 2 - 1 |
| 26 | }; |
| 27 | |
| 28 | /* Bitset representing status of connection. */ |
| 29 | enum ip_conntrack_status { |
| 30 | /* It's an expected connection: bit 0 set. This bit never changed */ |
| 31 | IPS_EXPECTED_BIT = 0, |
| 32 | IPS_EXPECTED = (1 << IPS_EXPECTED_BIT), |
| 33 | |
| 34 | /* We've seen packets both ways: bit 1 set. Can be set, not unset. */ |
| 35 | IPS_SEEN_REPLY_BIT = 1, |
| 36 | IPS_SEEN_REPLY = (1 << IPS_SEEN_REPLY_BIT), |
| 37 | |
| 38 | /* Conntrack should never be early-expired. */ |
| 39 | IPS_ASSURED_BIT = 2, |
| 40 | IPS_ASSURED = (1 << IPS_ASSURED_BIT), |
| 41 | |
| 42 | /* Connection is confirmed: originating packet has left box */ |
| 43 | IPS_CONFIRMED_BIT = 3, |
| 44 | IPS_CONFIRMED = (1 << IPS_CONFIRMED_BIT), |
| 45 | |
| 46 | /* Connection needs src nat in orig dir. This bit never changed. */ |
| 47 | IPS_SRC_NAT_BIT = 4, |
| 48 | IPS_SRC_NAT = (1 << IPS_SRC_NAT_BIT), |
| 49 | |
| 50 | /* Connection needs dst nat in orig dir. This bit never changed. */ |
| 51 | IPS_DST_NAT_BIT = 5, |
| 52 | IPS_DST_NAT = (1 << IPS_DST_NAT_BIT), |
| 53 | |
| 54 | /* Both together. */ |
| 55 | IPS_NAT_MASK = (IPS_DST_NAT | IPS_SRC_NAT), |
| 56 | |
| 57 | /* Connection needs TCP sequence adjusted. */ |
| 58 | IPS_SEQ_ADJUST_BIT = 6, |
| 59 | IPS_SEQ_ADJUST = (1 << IPS_SEQ_ADJUST_BIT), |
| 60 | |
| 61 | /* NAT initialization bits. */ |
| 62 | IPS_SRC_NAT_DONE_BIT = 7, |
| 63 | IPS_SRC_NAT_DONE = (1 << IPS_SRC_NAT_DONE_BIT), |
| 64 | |
| 65 | IPS_DST_NAT_DONE_BIT = 8, |
| 66 | IPS_DST_NAT_DONE = (1 << IPS_DST_NAT_DONE_BIT), |
| 67 | |
| 68 | /* Both together */ |
| 69 | IPS_NAT_DONE_MASK = (IPS_DST_NAT_DONE | IPS_SRC_NAT_DONE), |
| 70 | |
| 71 | /* Connection is dying (removed from lists), can not be unset. */ |
| 72 | IPS_DYING_BIT = 9, |
| 73 | IPS_DYING = (1 << IPS_DYING_BIT), |
Eric Leblond | 997ae83 | 2006-05-29 18:24:20 -0700 | [diff] [blame] | 74 | |
| 75 | /* Connection has fixed timeout. */ |
| 76 | IPS_FIXED_TIMEOUT_BIT = 10, |
| 77 | IPS_FIXED_TIMEOUT = (1 << IPS_FIXED_TIMEOUT_BIT), |
Patrick McHardy | b2a15a6 | 2010-02-03 14:13:03 +0100 | [diff] [blame] | 78 | |
| 79 | /* Conntrack is a template */ |
| 80 | IPS_TEMPLATE_BIT = 11, |
| 81 | IPS_TEMPLATE = (1 << IPS_TEMPLATE_BIT), |
Eric Dumazet | 5bfddbd | 2010-06-08 16:09:52 +0200 | [diff] [blame] | 82 | |
| 83 | /* Conntrack is a fake untracked entry */ |
| 84 | IPS_UNTRACKED_BIT = 12, |
| 85 | IPS_UNTRACKED = (1 << IPS_UNTRACKED_BIT), |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 86 | }; |
| 87 | |
Patrick McHardy | 0cebe4b | 2010-02-03 13:51:51 +0100 | [diff] [blame] | 88 | /* Connection tracking event types */ |
| 89 | enum ip_conntrack_events { |
| 90 | IPCT_NEW, /* new conntrack */ |
| 91 | IPCT_RELATED, /* related conntrack */ |
| 92 | IPCT_DESTROY, /* destroyed conntrack */ |
| 93 | IPCT_REPLY, /* connection has seen two-way traffic */ |
| 94 | IPCT_ASSURED, /* connection status has changed to assured */ |
| 95 | IPCT_PROTOINFO, /* protocol information has changed */ |
| 96 | IPCT_HELPER, /* new helper has been set */ |
| 97 | IPCT_MARK, /* new mark has been set */ |
| 98 | IPCT_NATSEQADJ, /* NAT is doing sequence adjustment */ |
| 99 | IPCT_SECMARK, /* new security mark has been set */ |
| 100 | }; |
| 101 | |
| 102 | enum ip_conntrack_expect_events { |
| 103 | IPEXP_NEW, /* new expectation */ |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 104 | IPEXP_DESTROY, /* destroyed expectation */ |
Patrick McHardy | 0cebe4b | 2010-02-03 13:51:51 +0100 | [diff] [blame] | 105 | }; |
| 106 | |
Pablo Neira Ayuso | 8b008fa | 2010-09-22 08:36:59 +0200 | [diff] [blame] | 107 | /* expectation flags */ |
| 108 | #define NF_CT_EXPECT_PERMANENT 0x1 |
| 109 | #define NF_CT_EXPECT_INACTIVE 0x2 |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 110 | #define NF_CT_EXPECT_USERSPACE 0x4 |
Pablo Neira Ayuso | 8b008fa | 2010-09-22 08:36:59 +0200 | [diff] [blame] | 111 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 112 | #ifdef __KERNEL__ |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 113 | struct ip_conntrack_stat { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 114 | unsigned int searched; |
| 115 | unsigned int found; |
| 116 | unsigned int new; |
| 117 | unsigned int invalid; |
| 118 | unsigned int ignore; |
| 119 | unsigned int delete; |
| 120 | unsigned int delete_list; |
| 121 | unsigned int insert; |
| 122 | unsigned int insert_failed; |
| 123 | unsigned int drop; |
| 124 | unsigned int early_drop; |
| 125 | unsigned int error; |
| 126 | unsigned int expect_new; |
| 127 | unsigned int expect_create; |
| 128 | unsigned int expect_delete; |
Jesper Dangaard Brouer | af740b2 | 2010-04-23 12:34:56 +0200 | [diff] [blame] | 129 | unsigned int search_restart; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 130 | }; |
| 131 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 132 | /* call to create an explicit dependency on nf_conntrack. */ |
| 133 | extern void need_conntrack(void); |
| 134 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 135 | #endif /* __KERNEL__ */ |
| 136 | |
| 137 | #endif /* _NF_CONNTRACK_COMMON_H */ |