1 #ifndef __LINUX_IP_NETFILTER_H 2 #define __LINUX_IP_NETFILTER_H 3 4 /* IPv4-specific defines for netfilter. 5 * (C)1998 Rusty Russell -- This code is GPL. 6 */ 7 8 #include <linux/config.h> 9 #include <linux/netfilter.h> 10 11 /* only for userspace compatibility */ 12 #ifndef __KERNEL__ 13 /* IP Cache bits. */ 14 /* Src IP address. */ 15 #define NFC_IP_SRC 0x0001 16 /* Dest IP address. */ 17 #define NFC_IP_DST 0x0002 18 /* Input device. */ 19 #define NFC_IP_IF_IN 0x0004 20 /* Output device. */ 21 #define NFC_IP_IF_OUT 0x0008 22 /* TOS. */ 23 #define NFC_IP_TOS 0x0010 24 /* Protocol. */ 25 #define NFC_IP_PROTO 0x0020 26 /* IP options. */ 27 #define NFC_IP_OPTIONS 0x0040 28 /* Frag & flags. */ 29 #define NFC_IP_FRAG 0x0080 30 31 /* Per-protocol information: only matters if proto match. */ 32 /* TCP flags. */ 33 #define NFC_IP_TCPFLAGS 0x0100 34 /* Source port. */ 35 #define NFC_IP_SRC_PT 0x0200 36 /* Dest port. */ 37 #define NFC_IP_DST_PT 0x0400 38 /* Something else about the proto */ 39 #define NFC_IP_PROTO_UNKNOWN 0x2000 40 #endif /* ! __KERNEL__ */ 41 42 /* IP Hooks */ 43 /* After promisc drops, checksum checks. */ 44 #define NF_IP_PRE_ROUTING 0 45 /* If the packet is destined for this box. */ 46 #define NF_IP_LOCAL_IN 1 47 /* If the packet is destined for another interface. */ 48 #define NF_IP_FORWARD 2 49 /* Packets coming from a local process. */ 50 #define NF_IP_LOCAL_OUT 3 51 /* Packets about to hit the wire. */ 52 #define NF_IP_POST_ROUTING 4 53 #define NF_IP_NUMHOOKS 5 54 55 enum nf_ip_hook_priorities { 56 NF_IP_PRI_FIRST = INT_MIN, 57 NF_IP_PRI_CONNTRACK_DEFRAG = -400, 58 NF_IP_PRI_RAW = -300, 59 NF_IP_PRI_SELINUX_FIRST = -225, 60 NF_IP_PRI_CONNTRACK = -200, 61 NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD = -175, 62 NF_IP_PRI_MANGLE = -150, 63 NF_IP_PRI_NAT_DST = -100, 64 NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT = -50, 65 NF_IP_PRI_FILTER = 0, 66 NF_IP_PRI_NAT_SRC = 100, 67 NF_IP_PRI_SELINUX_LAST = 225, 68 NF_IP_PRI_CONNTRACK_HELPER = INT_MAX - 2, 69 NF_IP_PRI_NAT_SEQ_ADJUST = INT_MAX - 1, 70 NF_IP_PRI_CONNTRACK_CONFIRM = INT_MAX, 71 NF_IP_PRI_LAST = INT_MAX, 72 }; 73 74 /* Arguments for setsockopt SOL_IP: */ 75 /* 2.0 firewalling went from 64 through 71 (and +256, +512, etc). */ 76 /* 2.2 firewalling (+ masq) went from 64 through 76 */ 77 /* 2.4 firewalling went 64 through 67. */ 78 #define SO_ORIGINAL_DST 80 79 80 #ifdef __KERNEL__ 81 extern int ip_route_me_harder(struct sk_buff **pskb); 82 83 #endif /*__KERNEL__*/ 84 85 #endif /*__LINUX_IP_NETFILTER_H*/ 86