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. */ |
| 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 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 157 | /* call to create an explicit dependency on nf_conntrack. */ |
| 158 | extern void need_conntrack(void); |
| 159 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 160 | #endif /* __KERNEL__ */ |
| 161 | |
| 162 | #endif /* _NF_CONNTRACK_COMMON_H */ |