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 58 enum 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
