/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

/*

 * Linux Socket Filter Data Structures

 */

#ifndef __LINUX_FILTER_H__

#define __LINUX_FILTER_H__

#include <linux/types.h>

#include <linux/bpf_common.h>

/*

 * Current version of the filter code architecture.

 */

#define BPF_MAJOR_VERSION 1

#define BPF_MINOR_VERSION 1

/*

 *	Try and keep these values and structures similar to BSD, especially

 *	the BPF code definitions which need to match so you can share filters

 */

struct sock_filter {	/* Filter block */

	__u16	code;   /* Actual filter code */

	__u8	jt;	/* Jump true */

	__u8	jf;	/* Jump false */

	__u32	k;      /* Generic multiuse field */

};

struct sock_fprog {	/* Required for SO_ATTACH_FILTER. */

	unsigned short		len;	/* Number of filter blocks */

	struct sock_filter *filter;

};

/* ret - BPF_K and BPF_X also apply */

#define BPF_RVAL(code)  ((code) & 0x18)

#define         BPF_A           0x10

/* misc */

#define BPF_MISCOP(code) ((code) & 0xf8)

#define         BPF_TAX         0x00

#define         BPF_TXA         0x80

/*

 * Macros for filter block array initializers.

 */

#ifndef BPF_STMT

#define BPF_STMT(code, k) { (unsigned short)(code), 0, 0, k }

#endif

#ifndef BPF_JUMP

#define BPF_JUMP(code, k, jt, jf) { (unsigned short)(code), jt, jf, k }

#endif

/*

 * Number of scratch memory words for: BPF_ST and BPF_STX

 */

#define BPF_MEMWORDS 16

/* RATIONALE. Negative offsets are invalid in BPF.

   We use them to reference ancillary data.

   Unlike introduction new instructions, it does not break

   existing compilers/optimizers.

 */

#define SKF_AD_OFF    (-0x1000)

#define SKF_AD_PROTOCOL 0

#define SKF_AD_PKTTYPE 	4

#define SKF_AD_IFINDEX 	8

#define SKF_AD_NLATTR	12

#define SKF_AD_NLATTR_NEST	16

#define SKF_AD_MARK 	20

#define SKF_AD_QUEUE	24

#define SKF_AD_HATYPE	28

#define SKF_AD_RXHASH	32

#define SKF_AD_CPU	36

#define SKF_AD_ALU_XOR_X	40

#define SKF_AD_VLAN_TAG	44

#define SKF_AD_VLAN_TAG_PRESENT 48

#define SKF_AD_PAY_OFFSET	52

#define SKF_AD_RANDOM	56

#define SKF_AD_VLAN_TPID	60

#define SKF_AD_MAX	64

#define SKF_NET_OFF	(-0x100000)

#define SKF_LL_OFF	(-0x200000)

#define BPF_NET_OFF	SKF_NET_OFF

#define BPF_LL_OFF	SKF_LL_OFF

#endif /* __LINUX_FILTER_H__ */