/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ #ifndef __LINUX_NETFILTER_H #define __LINUX_NETFILTER_H #include <linux/types.h> #include <linux/in.h> #include <linux/in6.h> /* Responses from hook functions. */ #define NF_DROP 0 #define NF_ACCEPT 1 #define NF_STOLEN 2 #define NF_QUEUE 3 #define NF_REPEAT 4 #define NF_STOP 5 /* Deprecated, for userspace nf_queue compatibility. */ #define NF_MAX_VERDICT NF_STOP /* we overload the higher bits for encoding auxiliary data such as the queue * number or errno values. Not nice, but better than additional function * arguments. */ #define NF_VERDICT_MASK 0x000000ff /* extra verdict flags have mask 0x0000ff00 */ #define NF_VERDICT_FLAG_QUEUE_BYPASS 0x00008000 /* queue number (NF_QUEUE) or errno (NF_DROP) */ #define NF_VERDICT_QMASK 0xffff0000 #define NF_VERDICT_QBITS 16 #define NF_QUEUE_NR(x) ((((x) << 16) & NF_VERDICT_QMASK) | NF_QUEUE) #define NF_DROP_ERR(x) (((-x) << 16) | NF_DROP) /* only for userspace compatibility */ /* NF_VERDICT_BITS should be 8 now, but userspace might break if this changes */ #define NF_VERDICT_BITS 16 enum nf_inet_hooks { NF_INET_PRE_ROUTING, NF_INET_LOCAL_IN, NF_INET_FORWARD, NF_INET_LOCAL_OUT, NF_INET_POST_ROUTING, NF_INET_NUMHOOKS, NF_INET_INGRESS = NF_INET_NUMHOOKS, }; enum nf_dev_hooks { NF_NETDEV_INGRESS, NF_NETDEV_NUMHOOKS }; enum { NFPROTO_UNSPEC = 0, NFPROTO_INET = 1, NFPROTO_IPV4 = 2, NFPROTO_ARP = 3, NFPROTO_NETDEV = 5, NFPROTO_BRIDGE = 7, NFPROTO_IPV6 = 10, NFPROTO_DECNET = 12, NFPROTO_NUMPROTO, }; union nf_inet_addr { __u32 all[4]; __be32 ip; __be32 ip6[4]; struct in_addr in; struct in6_addr in6; }; #endif /* __LINUX_NETFILTER_H */