| 1 |
13 |
serginhofr |
#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 |
|
|
/* 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 |
|
|
|
| 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,
|
| 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 |
|
|
#define NF_CT_STATE_INVALID_BIT (1 << 0)
|
| 29 |
|
|
#define NF_CT_STATE_BIT(ctinfo) (1 << ((ctinfo) % IP_CT_IS_REPLY + 1))
|
| 30 |
|
|
#define NF_CT_STATE_UNTRACKED_BIT (1 << (IP_CT_NUMBER + 1))
|
| 31 |
|
|
|
| 32 |
|
|
/* Bitset representing status of connection. */
|
| 33 |
|
|
enum ip_conntrack_status {
|
| 34 |
|
|
/* It's an expected connection: bit 0 set. This bit never changed */
|
| 35 |
|
|
IPS_EXPECTED_BIT = 0,
|
| 36 |
|
|
IPS_EXPECTED = (1 << IPS_EXPECTED_BIT),
|
| 37 |
|
|
|
| 38 |
|
|
/* We've seen packets both ways: bit 1 set. Can be set, not unset. */
|
| 39 |
|
|
IPS_SEEN_REPLY_BIT = 1,
|
| 40 |
|
|
IPS_SEEN_REPLY = (1 << IPS_SEEN_REPLY_BIT),
|
| 41 |
|
|
|
| 42 |
|
|
/* Conntrack should never be early-expired. */
|
| 43 |
|
|
IPS_ASSURED_BIT = 2,
|
| 44 |
|
|
IPS_ASSURED = (1 << IPS_ASSURED_BIT),
|
| 45 |
|
|
|
| 46 |
|
|
/* Connection is confirmed: originating packet has left box */
|
| 47 |
|
|
IPS_CONFIRMED_BIT = 3,
|
| 48 |
|
|
IPS_CONFIRMED = (1 << IPS_CONFIRMED_BIT),
|
| 49 |
|
|
|
| 50 |
|
|
/* Connection needs src nat in orig dir. This bit never changed. */
|
| 51 |
|
|
IPS_SRC_NAT_BIT = 4,
|
| 52 |
|
|
IPS_SRC_NAT = (1 << IPS_SRC_NAT_BIT),
|
| 53 |
|
|
|
| 54 |
|
|
/* Connection needs dst nat in orig dir. This bit never changed. */
|
| 55 |
|
|
IPS_DST_NAT_BIT = 5,
|
| 56 |
|
|
IPS_DST_NAT = (1 << IPS_DST_NAT_BIT),
|
| 57 |
|
|
|
| 58 |
|
|
/* Both together. */
|
| 59 |
|
|
IPS_NAT_MASK = (IPS_DST_NAT | IPS_SRC_NAT),
|
| 60 |
|
|
|
| 61 |
|
|
/* Connection needs TCP sequence adjusted. */
|
| 62 |
|
|
IPS_SEQ_ADJUST_BIT = 6,
|
| 63 |
|
|
IPS_SEQ_ADJUST = (1 << IPS_SEQ_ADJUST_BIT),
|
| 64 |
|
|
|
| 65 |
|
|
/* NAT initialization bits. */
|
| 66 |
|
|
IPS_SRC_NAT_DONE_BIT = 7,
|
| 67 |
|
|
IPS_SRC_NAT_DONE = (1 << IPS_SRC_NAT_DONE_BIT),
|
| 68 |
|
|
|
| 69 |
|
|
IPS_DST_NAT_DONE_BIT = 8,
|
| 70 |
|
|
IPS_DST_NAT_DONE = (1 << IPS_DST_NAT_DONE_BIT),
|
| 71 |
|
|
|
| 72 |
|
|
/* Both together */
|
| 73 |
|
|
IPS_NAT_DONE_MASK = (IPS_DST_NAT_DONE | IPS_SRC_NAT_DONE),
|
| 74 |
|
|
|
| 75 |
|
|
/* Connection is dying (removed from lists), can not be unset. */
|
| 76 |
|
|
IPS_DYING_BIT = 9,
|
| 77 |
|
|
IPS_DYING = (1 << IPS_DYING_BIT),
|
| 78 |
|
|
|
| 79 |
|
|
/* Connection has fixed timeout. */
|
| 80 |
|
|
IPS_FIXED_TIMEOUT_BIT = 10,
|
| 81 |
|
|
IPS_FIXED_TIMEOUT = (1 << IPS_FIXED_TIMEOUT_BIT),
|
| 82 |
|
|
|
| 83 |
|
|
/* Conntrack is a template */
|
| 84 |
|
|
IPS_TEMPLATE_BIT = 11,
|
| 85 |
|
|
IPS_TEMPLATE = (1 << IPS_TEMPLATE_BIT),
|
| 86 |
|
|
|
| 87 |
|
|
/* Conntrack is a fake untracked entry */
|
| 88 |
|
|
IPS_UNTRACKED_BIT = 12,
|
| 89 |
|
|
IPS_UNTRACKED = (1 << IPS_UNTRACKED_BIT),
|
| 90 |
|
|
|
| 91 |
|
|
/* Conntrack got a helper explicitly attached via CT target. */
|
| 92 |
|
|
IPS_HELPER_BIT = 13,
|
| 93 |
|
|
IPS_HELPER = (1 << IPS_HELPER_BIT),
|
| 94 |
|
|
};
|
| 95 |
|
|
|
| 96 |
|
|
/* Connection tracking event types */
|
| 97 |
|
|
enum ip_conntrack_events {
|
| 98 |
|
|
IPCT_NEW, /* new conntrack */
|
| 99 |
|
|
IPCT_RELATED, /* related conntrack */
|
| 100 |
|
|
IPCT_DESTROY, /* destroyed conntrack */
|
| 101 |
|
|
IPCT_REPLY, /* connection has seen two-way traffic */
|
| 102 |
|
|
IPCT_ASSURED, /* connection status has changed to assured */
|
| 103 |
|
|
IPCT_PROTOINFO, /* protocol information has changed */
|
| 104 |
|
|
IPCT_HELPER, /* new helper has been set */
|
| 105 |
|
|
IPCT_MARK, /* new mark has been set */
|
| 106 |
|
|
IPCT_SEQADJ, /* sequence adjustment has changed */
|
| 107 |
|
|
IPCT_NATSEQADJ = IPCT_SEQADJ,
|
| 108 |
|
|
IPCT_SECMARK, /* new security mark has been set */
|
| 109 |
|
|
IPCT_LABEL, /* new connlabel has been set */
|
| 110 |
|
|
};
|
| 111 |
|
|
|
| 112 |
|
|
enum ip_conntrack_expect_events {
|
| 113 |
|
|
IPEXP_NEW, /* new expectation */
|
| 114 |
|
|
IPEXP_DESTROY, /* destroyed expectation */
|
| 115 |
|
|
};
|
| 116 |
|
|
|
| 117 |
|
|
/* expectation flags */
|
| 118 |
|
|
#define NF_CT_EXPECT_PERMANENT 0x1
|
| 119 |
|
|
#define NF_CT_EXPECT_INACTIVE 0x2
|
| 120 |
|
|
#define NF_CT_EXPECT_USERSPACE 0x4
|
| 121 |
|
|
|
| 122 |
|
|
|
| 123 |
|
|
#endif /* _NF_CONNTRACK_COMMON_H */
|
