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 /* only for userspace compatibility */ 26 /* Generic cache responses from hook functions. 27 <= 0x2000 is used for protocol-flags. */ 28 #define NFC_UNKNOWN 0x4000 29 #define NFC_ALTERED 0x8000 30 31 enum nf_inet_hooks { 32 NF_INET_PRE_ROUTING, 33 NF_INET_LOCAL_IN, 34 NF_INET_FORWARD, 35 NF_INET_LOCAL_OUT, 36 NF_INET_POST_ROUTING, 37 NF_INET_NUMHOOKS 38 }; 39 40 union nf_inet_addr { 41 __u32 all[4]; 42 __be32 ip; 43 __be32 ip6[4]; 44 struct in_addr in; 45 struct in6_addr in6; 46 }; 47 48 #endif /*__LINUX_NETFILTER_H*/ 49