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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* IPv4-specific defines for netfilter. * (C)1998 Rusty Russell -- This code is GPL. */ #ifndef __LINUX_IP_NETFILTER_H #define __LINUX_IP_NETFILTER_H #include <linux/netfilter.h> /* only for userspace compatibility */ #include <limits.h> /* for INT_MIN, INT_MAX */ /* IP Cache bits. */ /* Src IP address. */ #define NFC_IP_SRC 0x0001 /* Dest IP address. */ #define NFC_IP_DST 0x0002 /* Input device. */ #define NFC_IP_IF_IN 0x0004 /* Output device. */ #define NFC_IP_IF_OUT 0x0008 /* TOS. */ #define NFC_IP_TOS 0x0010 /* Protocol. */ #define NFC_IP_PROTO 0x0020 /* IP options. */ #define NFC_IP_OPTIONS 0x0040 /* Frag & flags. */ #define NFC_IP_FRAG 0x0080 /* Per-protocol information: only matters if proto match. */ /* TCP flags. */ #define NFC_IP_TCPFLAGS 0x0100 /* Source port. */ #define NFC_IP_SRC_PT 0x0200 /* Dest port. */ #define NFC_IP_DST_PT 0x0400 /* Something else about the proto */ #define NFC_IP_PROTO_UNKNOWN 0x2000 /* IP Hooks */ /* After promisc drops, checksum checks. */ #define NF_IP_PRE_ROUTING 0 /* If the packet is destined for this box. */ #define NF_IP_LOCAL_IN 1 /* If the packet is destined for another interface. */ #define NF_IP_FORWARD 2 /* Packets coming from a local process. */ #define NF_IP_LOCAL_OUT 3 /* Packets about to hit the wire. */ #define NF_IP_POST_ROUTING 4 #define NF_IP_NUMHOOKS 5 enum nf_ip_hook_priorities { NF_IP_PRI_FIRST = INT_MIN, NF_IP_PRI_RAW_BEFORE_DEFRAG = -450, NF_IP_PRI_CONNTRACK_DEFRAG = -400, NF_IP_PRI_RAW = -300, NF_IP_PRI_SELINUX_FIRST = -225, NF_IP_PRI_CONNTRACK = -200, NF_IP_PRI_MANGLE = -150, NF_IP_PRI_NAT_DST = -100, NF_IP_PRI_FILTER = 0, NF_IP_PRI_SECURITY = 50, NF_IP_PRI_NAT_SRC = 100, NF_IP_PRI_SELINUX_LAST = 225, NF_IP_PRI_CONNTRACK_HELPER = 300, NF_IP_PRI_CONNTRACK_CONFIRM = INT_MAX, NF_IP_PRI_LAST = INT_MAX, }; /* Arguments for setsockopt SOL_IP: */ /* 2.0 firewalling went from 64 through 71 (and +256, +512, etc). */ /* 2.2 firewalling (+ masq) went from 64 through 76 */ /* 2.4 firewalling went 64 through 67. */ #define SO_ORIGINAL_DST 80 #endif /* __LINUX_IP_NETFILTER_H */