release/src-rt-6.x.4708/toolchains/hndtools-arm-linux-2.6.36-uclibc-4.5.3/arm-brcm-linux-uclibcgnueabi/sysroot/usr/include/linux/netfilter/nf_conntrack_common.h

   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         /* 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         /* Number of distinct IP_CT types (no NEW in reply dirn). */
  22         IP_CT_NUMBER = IP_CT_IS_REPLY * 2 - 1
  23 };
  24
  25 /* Bitset representing status of connection. */
  26 enum ip_conntrack_status {
  27         /* It's an expected connection: bit 0 set.  This bit never changed */
  28         IPS_EXPECTED_BIT = 0,
  29         IPS_EXPECTED = (1 << IPS_EXPECTED_BIT),
  30
  31         /* We've seen packets both ways: bit 1 set.  Can be set, not unset. */
  32         IPS_SEEN_REPLY_BIT = 1,
  33         IPS_SEEN_REPLY = (1 << IPS_SEEN_REPLY_BIT),
  34
  35         /* Conntrack should never be early-expired. */
  36         IPS_ASSURED_BIT = 2,
  37         IPS_ASSURED = (1 << IPS_ASSURED_BIT),
  38
  39         /* Connection is confirmed: originating packet has left box */
  40         IPS_CONFIRMED_BIT = 3,
  41         IPS_CONFIRMED = (1 << IPS_CONFIRMED_BIT),
  42
  43         /* Connection needs src nat in orig dir.  This bit never changed. */
  44         IPS_SRC_NAT_BIT = 4,
  45         IPS_SRC_NAT = (1 << IPS_SRC_NAT_BIT),
  46
  47         /* Connection needs dst nat in orig dir.  This bit never changed. */
  48         IPS_DST_NAT_BIT = 5,
  49         IPS_DST_NAT = (1 << IPS_DST_NAT_BIT),
  50
  51         /* Both together. */
  52         IPS_NAT_MASK = (IPS_DST_NAT | IPS_SRC_NAT),
  53
  54         /* Connection needs TCP sequence adjusted. */
  55         IPS_SEQ_ADJUST_BIT = 6,
  56         IPS_SEQ_ADJUST = (1 << IPS_SEQ_ADJUST_BIT),
  57
  58         /* NAT initialization bits. */
  59         IPS_SRC_NAT_DONE_BIT = 7,
  60         IPS_SRC_NAT_DONE = (1 << IPS_SRC_NAT_DONE_BIT),
  61
  62         IPS_DST_NAT_DONE_BIT = 8,
  63         IPS_DST_NAT_DONE = (1 << IPS_DST_NAT_DONE_BIT),
  64
  65         /* Both together */
  66         IPS_NAT_DONE_MASK = (IPS_DST_NAT_DONE | IPS_SRC_NAT_DONE),
  67
  68         /* Connection is dying (removed from lists), can not be unset. */
  69         IPS_DYING_BIT = 9,
  70         IPS_DYING = (1 << IPS_DYING_BIT),
  71
  72         /* Connection has fixed timeout. */
  73         IPS_FIXED_TIMEOUT_BIT = 10,
  74         IPS_FIXED_TIMEOUT = (1 << IPS_FIXED_TIMEOUT_BIT),
  75
  76         /* Conntrack is a template */
  77         IPS_TEMPLATE_BIT = 11,
  78         IPS_TEMPLATE = (1 << IPS_TEMPLATE_BIT),
  79
  80         /* Conntrack is a fake untracked entry */
  81         IPS_UNTRACKED_BIT = 12,
  82         IPS_UNTRACKED = (1 << IPS_UNTRACKED_BIT),
  83 };
  84
  85 /* Connection tracking event types */
  86 enum ip_conntrack_events {
  87         IPCT_NEW,               /* new conntrack */
  88         IPCT_RELATED,           /* related conntrack */
  89         IPCT_DESTROY,           /* destroyed conntrack */
  90         IPCT_REPLY,             /* connection has seen two-way traffic */
  91         IPCT_ASSURED,           /* connection status has changed to assured */
  92         IPCT_PROTOINFO,         /* protocol information has changed */
  93         IPCT_HELPER,            /* new helper has been set */
  94         IPCT_MARK,              /* new mark has been set */
  95         IPCT_NATSEQADJ,         /* NAT is doing sequence adjustment */
  96         IPCT_SECMARK,           /* new security mark has been set */
  97 };
  98
  99 enum ip_conntrack_expect_events {
 100         IPEXP_NEW,              /* new expectation */
 101 };
 102
 103
 104 #endif /* _NF_CONNTRACK_COMMON_H */