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Edit File : netfilter.h \| Size : 1.78 KB
/* 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 / / Generic cache responses from hook functions. <= 0x2000 is used for protocol-flags. / #define NFC_UNKNOWN 0x4000 #define NFC_ALTERED 0x8000 / 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 }; 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 */ Back

Edit File : netfilter.h | Size : 1.78 KB

/* 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 */
/* Generic cache responses from hook functions.
   <= 0x2000 is used for protocol-flags. */
#define NFC_UNKNOWN 0x4000
#define NFC_ALTERED 0x8000

/* 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
};

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 */

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