1 #ifndef _UAPI__LINUX_NETFILTER_H 2 #define _UAPI__LINUX_NETFILTER_H 3 4 #include <linux/types.h> 5 #include <linux/compiler.h> 6 #include <linux/sysctl.h> 7 8 9 /* Responses from hook functions. */ 10 #define NF_DROP 0 11 #define NF_ACCEPT 1 12 #define NF_STOLEN 2 13 #define NF_QUEUE 3 14 #define NF_REPEAT 4 15 #define NF_STOP 5 16 #define NF_MAX_VERDICT NF_STOP 17 18 /* we overload the higher bits for encoding auxiliary data such as the queue 19 * number or errno values. Not nice, but better than additional function 20 * arguments. */ 21 #define NF_VERDICT_MASK 0x000000ff 22 23 /* extra verdict flags have mask 0x0000ff00 */ 24 #define NF_VERDICT_FLAG_QUEUE_BYPASS 0x00008000 25 26 /* queue number (NF_QUEUE) or errno (NF_DROP) */ 27 #define NF_VERDICT_QMASK 0xffff0000 28 #define NF_VERDICT_QBITS 16 29 30 #define NF_QUEUE_NR(x) ((((x) << 16) & NF_VERDICT_QMASK) | NF_QUEUE) 31 32 #define NF_DROP_ERR(x) (((-x) << 16) | NF_DROP) 33 34 /* only for userspace compatibility */ 35 #ifndef __KERNEL__ 36 /* Generic cache responses from hook functions. 37 <= 0x2000 is used for protocol-flags. */ 38 #define NFC_UNKNOWN 0x4000 39 #define NFC_ALTERED 0x8000 40 41 /* NF_VERDICT_BITS should be 8 now, but userspace might break if this changes */ 42 #define NF_VERDICT_BITS 16 43 #endif 44 45 enum nf_inet_hooks { 46 NF_INET_PRE_ROUTING, 47 NF_INET_LOCAL_IN, 48 NF_INET_FORWARD, 49 NF_INET_LOCAL_OUT, 50 NF_INET_POST_ROUTING, 51 NF_INET_NUMHOOKS 52 }; 53 54 enum { 55 NFPROTO_UNSPEC = 0, 56 NFPROTO_INET = 1, 57 NFPROTO_IPV4 = 2, 58 NFPROTO_ARP = 3, 59 NFPROTO_BRIDGE = 7, 60 NFPROTO_IPV6 = 10, 61 NFPROTO_DECNET = 12, 62 NFPROTO_NUMPROTO, 63 }; 64 65 union nf_inet_addr { 66 __u32 all[4]; 67 __be32 ip; 68 __be32 ip6[4]; 69 struct in_addr in; 70 struct in6_addr in6; 71 }; 72 73 #endif /* _UAPI__LINUX_NETFILTER_H */ 74
