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 Hooks */
  17/* After promisc drops, checksum checks. */
  18#define NF_IP_PRE_ROUTING       0
  19/* If the packet is destined for this box. */
  20#define NF_IP_LOCAL_IN          1
  21/* If the packet is destined for another interface. */
  22#define NF_IP_FORWARD           2
  23/* Packets coming from a local process. */
  24#define NF_IP_LOCAL_OUT         3
  25/* Packets about to hit the wire. */
  26#define NF_IP_POST_ROUTING      4
  27#define NF_IP_NUMHOOKS          5
  28#endif /* ! __KERNEL__ */
  29
  30enum nf_ip_hook_priorities {
  31        NF_IP_PRI_FIRST = INT_MIN,
  32        NF_IP_PRI_RAW_BEFORE_DEFRAG = -450,
  33        NF_IP_PRI_CONNTRACK_DEFRAG = -400,
  34        NF_IP_PRI_RAW = -300,
  35        NF_IP_PRI_SELINUX_FIRST = -225,
  36        NF_IP_PRI_CONNTRACK = -200,
  37        NF_IP_PRI_MANGLE = -150,
  38        NF_IP_PRI_NAT_DST = -100,
  39        NF_IP_PRI_FILTER = 0,
  40        NF_IP_PRI_SECURITY = 50,
  41        NF_IP_PRI_NAT_SRC = 100,
  42        NF_IP_PRI_SELINUX_LAST = 225,
  43        NF_IP_PRI_CONNTRACK_HELPER = 300,
  44        NF_IP_PRI_CONNTRACK_CONFIRM = INT_MAX,
  45        NF_IP_PRI_LAST = INT_MAX,
  46};
  47
  48/* Arguments for setsockopt SOL_IP: */
  49/* 2.0 firewalling went from 64 through 71 (and +256, +512, etc). */
  50/* 2.2 firewalling (+ masq) went from 64 through 76 */
  51/* 2.4 firewalling went 64 through 67. */
  52#define SO_ORIGINAL_DST 80
  53
  54
  55#endif /* _UAPI__LINUX_IP_NETFILTER_H */
  56