include/linux/netfilter/xt_conntrack.h

   1 /* Header file for kernel module to match connection tracking information.
   2  * GPL (C) 2001  Marc Boucher (marc@mbsi.ca).
   3  */
   4
   5 #ifndef _XT_CONNTRACK_H
   6 #define _XT_CONNTRACK_H
   7
   8 #include <linux/netfilter/nf_conntrack_tuple_common.h>
   9
  10 #define XT_CONNTRACK_STATE_BIT(ctinfo) (1 << ((ctinfo)%IP_CT_IS_REPLY+1))
  11 #define XT_CONNTRACK_STATE_INVALID (1 << 0)
  12
  13 #define XT_CONNTRACK_STATE_SNAT (1 << (IP_CT_NUMBER + 1))
  14 #define XT_CONNTRACK_STATE_DNAT (1 << (IP_CT_NUMBER + 2))
  15 #define XT_CONNTRACK_STATE_UNTRACKED (1 << (IP_CT_NUMBER + 3))
  16
  17 /* flags, invflags: */
  18 enum {
  19         XT_CONNTRACK_STATE        = 1 << 0,
  20         XT_CONNTRACK_PROTO        = 1 << 1,
  21         XT_CONNTRACK_ORIGSRC      = 1 << 2,
  22         XT_CONNTRACK_ORIGDST      = 1 << 3,
  23         XT_CONNTRACK_REPLSRC      = 1 << 4,
  24         XT_CONNTRACK_REPLDST      = 1 << 5,
  25         XT_CONNTRACK_STATUS       = 1 << 6,
  26         XT_CONNTRACK_EXPIRES      = 1 << 7,
  27         XT_CONNTRACK_ORIGSRC_PORT = 1 << 8,
  28         XT_CONNTRACK_ORIGDST_PORT = 1 << 9,
  29         XT_CONNTRACK_REPLSRC_PORT = 1 << 10,
  30         XT_CONNTRACK_REPLDST_PORT = 1 << 11,
  31         XT_CONNTRACK_DIRECTION    = 1 << 12,
  32 };
  33
  34 /* This is exposed to userspace, so remains frozen in time. */
  35 struct ip_conntrack_old_tuple
  36 {
  37         struct {
  38                 __be32 ip;
  39                 union {
  40                         __u16 all;
  41                 } u;
  42         } src;
  43
  44         struct {
  45                 __be32 ip;
  46                 union {
  47                         __u16 all;
  48                 } u;
  49
  50                 /* The protocol. */
  51                 __u16 protonum;
  52         } dst;
  53 };
  54
  55 struct xt_conntrack_info
  56 {
  57         unsigned int statemask, statusmask;
  58
  59         struct ip_conntrack_old_tuple tuple[IP_CT_DIR_MAX];
  60         struct in_addr sipmsk[IP_CT_DIR_MAX], dipmsk[IP_CT_DIR_MAX];
  61
  62         unsigned long expires_min, expires_max;
  63
  64         /* Flags word */
  65         u_int8_t flags;
  66         /* Inverse flags */
  67         u_int8_t invflags;
  68 };
  69
  70 struct xt_conntrack_mtinfo1 {
  71         union nf_inet_addr origsrc_addr, origsrc_mask;
  72         union nf_inet_addr origdst_addr, origdst_mask;
  73         union nf_inet_addr replsrc_addr, replsrc_mask;
  74         union nf_inet_addr repldst_addr, repldst_mask;
  75         u_int32_t expires_min, expires_max;
  76         u_int16_t l4proto;
  77         __be16 origsrc_port, origdst_port;
  78         __be16 replsrc_port, repldst_port;
  79         u_int16_t match_flags, invert_flags;
  80         u_int8_t state_mask, status_mask;
  81 };
  82
  83 #endif /*_XT_CONNTRACK_H*/