91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
|
#ifndef __LINUX_IP_NETFILTER_H
|
||
|
#define __LINUX_IP_NETFILTER_H
|
||
|
|
||
|
/* IPv4-specific defines for netfilter.
|
||
|
* (C)1998 Rusty Russell -- This code is GPL.
|
||
|
*/
|
||
|
|
||
|
#include <linux/config.h>
|
||
|
#include <linux/netfilter.h>
|
||
|
|
||
|
/* 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_CONNTRACK_DEFRAG = -400,
|
||
|
NF_IP_PRI_RAW = -300,
|
||
|
NF_IP_PRI_SELINUX_FIRST = -225,
|
||
|
NF_IP_PRI_CONNTRACK = -200,
|
||
|
NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD = -175,
|
||
|
NF_IP_PRI_MANGLE = -150,
|
||
|
NF_IP_PRI_NAT_DST = -100,
|
||
|
NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT = -50,
|
||
|
NF_IP_PRI_FILTER = 0,
|
||
|
NF_IP_PRI_NAT_SRC = 100,
|
||
|
NF_IP_PRI_SELINUX_LAST = 225,
|
||
|
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
|
||
|
|
||
|
#ifdef __KERNEL__
|
||
|
#ifdef CONFIG_NETFILTER_DEBUG
|
||
|
void nf_debug_ip_local_deliver(struct sk_buff *skb);
|
||
|
void nf_debug_ip_loopback_xmit(struct sk_buff *newskb);
|
||
|
void nf_debug_ip_finish_output2(struct sk_buff *skb);
|
||
|
#endif /*CONFIG_NETFILTER_DEBUG*/
|
||
|
|
||
|
extern int ip_route_me_harder(struct sk_buff **pskb);
|
||
|
|
||
|
/* Call this before modifying an existing IP packet: ensures it is
|
||
|
modifiable and linear to the point you care about (writable_len).
|
||
|
Returns true or false. */
|
||
|
extern int skb_ip_make_writable(struct sk_buff **pskb,
|
||
|
unsigned int writable_len);
|
||
|
#endif /*__KERNEL__*/
|
||
|
|
||
|
#endif /*__LINUX_IP_NETFILTER_H*/
|