projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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 | /* IP Cache bits. */ | |
| 12 | /* Src IP address. */ | |
| 13 | #define NFC_IP_SRC 0x0001 | |
| 14 | /* Dest IP address. */ | |
| 15 | #define NFC_IP_DST 0x0002 | |
| 16 | /* Input device. */ | |
| 17 | #define NFC_IP_IF_IN 0x0004 | |
| 18 | /* Output device. */ | |
| 19 | #define NFC_IP_IF_OUT 0x0008 | |
| 20 | /* TOS. */ | |
| 21 | #define NFC_IP_TOS 0x0010 | |
| 22 | /* Protocol. */ | |
| 23 | #define NFC_IP_PROTO 0x0020 | |
| 24 | /* IP options. */ | |
| 25 | #define NFC_IP_OPTIONS 0x0040 | |
| 26 | /* Frag & flags. */ | |
| 27 | #define NFC_IP_FRAG 0x0080 | |
| 28 | ||
| 29 | /* Per-protocol information: only matters if proto match. */ | |
| 30 | /* TCP flags. */ | |
| 31 | #define NFC_IP_TCPFLAGS 0x0100 | |
| 32 | /* Source port. */ | |
| 33 | #define NFC_IP_SRC_PT 0x0200 | |
| 34 | /* Dest port. */ | |
| 35 | #define NFC_IP_DST_PT 0x0400 | |
| 36 | /* Something else about the proto */ | |
| 37 | #define NFC_IP_PROTO_UNKNOWN 0x2000 | |
| 38 | ||
| 39 | /* IP Hooks */ | |
| 40 | /* After promisc drops, checksum checks. */ | |
| 41 | #define NF_IP_PRE_ROUTING 0 | |
| 42 | /* If the packet is destined for this box. */ | |
| 43 | #define NF_IP_LOCAL_IN 1 | |
| 44 | /* If the packet is destined for another interface. */ | |
| 45 | #define NF_IP_FORWARD 2 | |
| 46 | /* Packets coming from a local process. */ | |
| 47 | #define NF_IP_LOCAL_OUT 3 | |
| 48 | /* Packets about to hit the wire. */ | |
| 49 | #define NF_IP_POST_ROUTING 4 | |
| 50 | #define NF_IP_NUMHOOKS 5 | |
| 51 | ||
| 52 | enum nf_ip_hook_priorities { | |
| 53 | NF_IP_PRI_FIRST = INT_MIN, | |
| 54 | NF_IP_PRI_CONNTRACK_DEFRAG = -400, | |
| 55 | NF_IP_PRI_RAW = -300, | |
| 56 | NF_IP_PRI_SELINUX_FIRST = -225, | |
| 57 | NF_IP_PRI_CONNTRACK = -200, | |
| 58 | NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD = -175, | |
| 59 | NF_IP_PRI_MANGLE = -150, | |
| 60 | NF_IP_PRI_NAT_DST = -100, | |
| 61 | NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT = -50, | |
| 62 | NF_IP_PRI_FILTER = 0, | |
| 63 | NF_IP_PRI_NAT_SRC = 100, | |
| 64 | NF_IP_PRI_SELINUX_LAST = 225, | |
| 65 | NF_IP_PRI_LAST = INT_MAX, | |
| 66 | }; | |
| 67 | ||
| 68 | /* Arguments for setsockopt SOL_IP: */ | |
| 69 | /* 2.0 firewalling went from 64 through 71 (and +256, +512, etc). */ | |
| 70 | /* 2.2 firewalling (+ masq) went from 64 through 76 */ | |
| 71 | /* 2.4 firewalling went 64 through 67. */ | |
| 72 | #define SO_ORIGINAL_DST 80 | |
| 73 | ||
| 74 | #ifdef __KERNEL__ | |
| 75 | #ifdef CONFIG_NETFILTER_DEBUG | |
| 76 | void nf_debug_ip_local_deliver(struct sk_buff *skb); | |
| 77 | void nf_debug_ip_loopback_xmit(struct sk_buff *newskb); | |
| 78 | void nf_debug_ip_finish_output2(struct sk_buff *skb); | |
| 79 | #endif /*CONFIG_NETFILTER_DEBUG*/ | |
| 80 | ||
| 81 | extern int ip_route_me_harder(struct sk_buff **pskb); | |
| 82 | ||
| 83 | /* Call this before modifying an existing IP packet: ensures it is | |
| 84 | modifiable and linear to the point you care about (writable_len). | |
| 85 | Returns true or false. */ | |
| 86 | extern int skb_ip_make_writable(struct sk_buff **pskb, | |
| 87 | unsigned int writable_len); | |
| 88 | #endif /*__KERNEL__*/ | |
| 89 | ||
| 90 | #endif /*__LINUX_IP_NETFILTER_H*/ |