1 #ifndef __LINUX_NETFILTER_H 2 #define __LINUX_NETFILTER_H 3 4 #include <linux/types.h> 5 6 /* Responses from hook functions. */ 7 #define NF_DROP 0 8 #define NF_ACCEPT 1 9 #define NF_STOLEN 2 10 #define NF_QUEUE 3 11 #define NF_REPEAT 4 12 #define NF_STOP 5 13 #define NF_MAX_VERDICT NF_STOP 14 15 /* we overload the higher bits for encoding auxiliary data such as the queue 16 * number. Not nice, but better than additional function arguments. */ 17 #define NF_VERDICT_MASK 0x0000ffff 18 #define NF_VERDICT_BITS 16 19 20 #define NF_VERDICT_QMASK 0xffff0000 21 #define NF_VERDICT_QBITS 16 22 23 #define NF_QUEUE_NR(x) ((((x) << NF_VERDICT_BITS) & NF_VERDICT_QMASK) | NF_QUEUE) 24 25 /* Generic cache responses from hook functions. 26 <= 0x2000 is used for protocol-flags. */ 27 #define NFC_UNKNOWN 0x4000 28 #define NFC_ALTERED 0x8000 29 30 enum nf_inet_hooks { 31 NF_INET_PRE_ROUTING, 32 NF_INET_LOCAL_IN, 33 NF_INET_FORWARD, 34 NF_INET_LOCAL_OUT, 35 NF_INET_POST_ROUTING, 36 NF_INET_NUMHOOKS 37 }; 38 39 enum { 40 NFPROTO_UNSPEC = 0, 41 NFPROTO_IPV4 = 2, 42 NFPROTO_ARP = 3, 43 NFPROTO_BRIDGE = 7, 44 NFPROTO_IPV6 = 10, 45 NFPROTO_DECNET = 12, 46 NFPROTO_NUMPROTO, 47 }; 48 49 union nf_inet_addr { 50 __u32 all[4]; 51 __be32 ip; 52 __be32 ip6[4]; 53 struct in_addr in; 54 struct in6_addr in6; 55 }; 56 57 #endif /*__LINUX_NETFILTER_H*/ 58
