LXR linux/include/uapi/linux/netfilter

   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2/* IPv4-specific defines for netfilter. 
   3 * (C)1998 Rusty Russell -- This code is GPL.
   4 */
   5#ifndef _UAPI__LINUX_IP_NETFILTER_H
   6#define _UAPI__LINUX_IP_NETFILTER_H
   7
   8
   9#include <linux/netfilter.h>
  10
  11/* only for userspace compatibility */
  12#ifndef __KERNEL__
  13
  14#include <limits.h> /* for INT_MIN, INT_MAX */
  15
  16/* IP Cache bits. */
  17/* Src IP address. */
  18#define NFC_IP_SRC              0x0001
  19/* Dest IP address. */
  20#define NFC_IP_DST              0x0002
  21/* Input device. */
  22#define NFC_IP_IF_IN            0x0004
  23/* Output device. */
  24#define NFC_IP_IF_OUT           0x0008
  25/* TOS. */
  26#define NFC_IP_TOS              0x0010
  27/* Protocol. */
  28#define NFC_IP_PROTO            0x0020
  29/* IP options. */
  30#define NFC_IP_OPTIONS          0x0040
  31/* Frag & flags. */
  32#define NFC_IP_FRAG             0x0080
  33
  34/* Per-protocol information: only matters if proto match. */
  35/* TCP flags. */
  36#define NFC_IP_TCPFLAGS         0x0100
  37/* Source port. */
  38#define NFC_IP_SRC_PT           0x0200
  39/* Dest port. */
  40#define NFC_IP_DST_PT           0x0400
  41/* Something else about the proto */
  42#define NFC_IP_PROTO_UNKNOWN    0x2000
  43
  44/* IP Hooks */
  45/* After promisc drops, checksum checks. */
  46#define NF_IP_PRE_ROUTING       0
  47/* If the packet is destined for this box. */
  48#define NF_IP_LOCAL_IN          1
  49/* If the packet is destined for another interface. */
  50#define NF_IP_FORWARD           2
  51/* Packets coming from a local process. */
  52#define NF_IP_LOCAL_OUT         3
  53/* Packets about to hit the wire. */
  54#define NF_IP_POST_ROUTING      4
  55#define NF_IP_NUMHOOKS          5
  56#endif /* ! __KERNEL__ */
  57
  58enum nf_ip_hook_priorities {
  59        NF_IP_PRI_FIRST = INT_MIN,
  60        NF_IP_PRI_RAW_BEFORE_DEFRAG = -450,
  61        NF_IP_PRI_CONNTRACK_DEFRAG = -400,
  62        NF_IP_PRI_RAW = -300,
  63        NF_IP_PRI_SELINUX_FIRST = -225,
  64        NF_IP_PRI_CONNTRACK = -200,
  65        NF_IP_PRI_MANGLE = -150,
  66        NF_IP_PRI_NAT_DST = -100,
  67        NF_IP_PRI_FILTER = 0,
  68        NF_IP_PRI_SECURITY = 50,
  69        NF_IP_PRI_NAT_SRC = 100,
  70        NF_IP_PRI_SELINUX_LAST = 225,
  71        NF_IP_PRI_CONNTRACK_HELPER = 300,
  72        NF_IP_PRI_CONNTRACK_CONFIRM = INT_MAX,
  73        NF_IP_PRI_LAST = INT_MAX,
  74};
  75
  76/* Arguments for setsockopt SOL_IP: */
  77/* 2.0 firewalling went from 64 through 71 (and +256, +512, etc). */
  78/* 2.2 firewalling (+ masq) went from 64 through 76 */
  79/* 2.4 firewalling went 64 through 67. */
  80#define SO_ORIGINAL_DST 80
  81
  82
  83#endif /* _UAPI__LINUX_IP_NETFILTER_H */
  84