77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
|
/* 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_EGRESS,
|
||
|
|
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 */
|