cregit-Linux how code gets into the kernel

Release 4.12 include/uapi/linux/netfilter.h

#ifndef _UAPI__LINUX_NETFILTER_H

#define _UAPI__LINUX_NETFILTER_H

#include <linux/types.h>
#include <linux/compiler.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 */
#ifndef __KERNEL__
/* 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
#endif


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 /* _UAPI__LINUX_NETFILTER_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
David Howells17289.12%120.00%
Pablo Neira Ayuso178.81%360.00%
Patrick McHardy42.07%120.00%
Total193100.00%5100.00%
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