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