1be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger#ifndef __LINUX_NETFILTER_H 2be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger#define __LINUX_NETFILTER_H 3be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger 43ea2fb985f3aa979a2b270d01fa651a5ef814464Stephen Hemminger#include <linux/types.h> 5be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger 6e760a19a437997820f16846636c0db23faa6d3baStephen Hemminger#include <linux/sysctl.h> 719ecc16d72bb5767b1427a7579e5884813f2c9e8Stephen Hemminger 8be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger/* Responses from hook functions. */ 9be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger#define NF_DROP 0 10be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger#define NF_ACCEPT 1 11be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger#define NF_STOLEN 2 12be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger#define NF_QUEUE 3 13be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger#define NF_REPEAT 4 14be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger#define NF_STOP 5 15be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger#define NF_MAX_VERDICT NF_STOP 16be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger 17be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger/* we overload the higher bits for encoding auxiliary data such as the queue 1821cfb5e1d9dfce7612ba622bcaf8e301268a35c8Stephen Hemminger * number or errno values. Not nice, but better than additional function 1921cfb5e1d9dfce7612ba622bcaf8e301268a35c8Stephen Hemminger * arguments. */ 2021cfb5e1d9dfce7612ba622bcaf8e301268a35c8Stephen Hemminger#define NF_VERDICT_MASK 0x000000ff 2121cfb5e1d9dfce7612ba622bcaf8e301268a35c8Stephen Hemminger 2221cfb5e1d9dfce7612ba622bcaf8e301268a35c8Stephen Hemminger/* extra verdict flags have mask 0x0000ff00 */ 2321cfb5e1d9dfce7612ba622bcaf8e301268a35c8Stephen Hemminger#define NF_VERDICT_FLAG_QUEUE_BYPASS 0x00008000 24be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger 2521cfb5e1d9dfce7612ba622bcaf8e301268a35c8Stephen Hemminger/* queue number (NF_QUEUE) or errno (NF_DROP) */ 26be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger#define NF_VERDICT_QMASK 0xffff0000 27be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger#define NF_VERDICT_QBITS 16 28be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger 2921cfb5e1d9dfce7612ba622bcaf8e301268a35c8Stephen Hemminger#define NF_QUEUE_NR(x) ((((x) << 16) & NF_VERDICT_QMASK) | NF_QUEUE) 30be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger 3121cfb5e1d9dfce7612ba622bcaf8e301268a35c8Stephen Hemminger#define NF_DROP_ERR(x) (((-x) << 16) | NF_DROP) 329351fec72d2bb4e7501c12949855ab252b037bceStephen Hemminger 33be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger/* only for userspace compatibility */ 34be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger/* Generic cache responses from hook functions. 35be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger <= 0x2000 is used for protocol-flags. */ 36be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger#define NFC_UNKNOWN 0x4000 37be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger#define NFC_ALTERED 0x8000 38be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger 3921cfb5e1d9dfce7612ba622bcaf8e301268a35c8Stephen Hemminger/* NF_VERDICT_BITS should be 8 now, but userspace might break if this changes */ 4021cfb5e1d9dfce7612ba622bcaf8e301268a35c8Stephen Hemminger#define NF_VERDICT_BITS 16 4121cfb5e1d9dfce7612ba622bcaf8e301268a35c8Stephen Hemminger 42be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemmingerenum nf_inet_hooks { 43be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger NF_INET_PRE_ROUTING, 44be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger NF_INET_LOCAL_IN, 45be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger NF_INET_FORWARD, 46be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger NF_INET_LOCAL_OUT, 47be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger NF_INET_POST_ROUTING, 48be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger NF_INET_NUMHOOKS 49be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger}; 50be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger 5105bfd165958d1859275b0158fedcb00cea58ad0dStephen Hemmingerenum { 5205bfd165958d1859275b0158fedcb00cea58ad0dStephen Hemminger NFPROTO_UNSPEC = 0, 5305bfd165958d1859275b0158fedcb00cea58ad0dStephen Hemminger NFPROTO_IPV4 = 2, 5405bfd165958d1859275b0158fedcb00cea58ad0dStephen Hemminger NFPROTO_ARP = 3, 5505bfd165958d1859275b0158fedcb00cea58ad0dStephen Hemminger NFPROTO_BRIDGE = 7, 5605bfd165958d1859275b0158fedcb00cea58ad0dStephen Hemminger NFPROTO_IPV6 = 10, 5705bfd165958d1859275b0158fedcb00cea58ad0dStephen Hemminger NFPROTO_DECNET = 12, 5805bfd165958d1859275b0158fedcb00cea58ad0dStephen Hemminger NFPROTO_NUMPROTO, 5905bfd165958d1859275b0158fedcb00cea58ad0dStephen Hemminger}; 6005bfd165958d1859275b0158fedcb00cea58ad0dStephen Hemminger 61bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemmingerunion nf_inet_addr { 625344bb287cbf6bb68741a19c2dc66b3fd33e9258Stephen Hemminger __u32 all[4]; 63bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger __be32 ip; 64bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger __be32 ip6[4]; 65fb8cc5b26874bc67c4924155711b3f49f0d9b1eeStephen Hemminger struct in_addr in; 66fb8cc5b26874bc67c4924155711b3f49f0d9b1eeStephen Hemminger struct in6_addr in6; 67bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger}; 68bfe594fe31419a5f2cdd7ed7864b587d76fc22deStephen Hemminger 69be8d89d3bf4aac08a67c02e317e15dcd82447b58Stephen Hemminger#endif /*__LINUX_NETFILTER_H*/ 70