#ifndef BPF_INSNS_H
#define BPF_INSNS_H

#ifndef BPF_MAXINSNS
# define BPF_MAXINSNS	4096
#endif

#define BPF_CLASS(code) ((code) & 0x07)
#define	BPF_LD		0x00
#define	BPF_LDX		0x01
#define	BPF_ST		0x02
#define	BPF_STX		0x03
#define	BPF_ALU		0x04
#define	BPF_JMP		0x05
#define	BPF_RET		0x06
#define	BPF_MISC	0x07

#define BPF_SIZE(code)	((code) & 0x18)
#define	BPF_W		0x00
#define	BPF_H		0x08
#define	BPF_B		0x10

#define BPF_MODE(code)	((code) & 0xe0)
#define	BPF_IMM 	0x00
#define	BPF_ABS		0x20
#define	BPF_IND		0x40
#define	BPF_MEM		0x60
#define	BPF_LEN		0x80
#define	BPF_MSH		0xa0

#define BPF_OP(code)	((code) & 0xf0)
#define	BPF_ADD		0x00
#define	BPF_SUB		0x10
#define	BPF_MUL		0x20
#define	BPF_DIV		0x30
#define	BPF_OR		0x40
#define	BPF_AND		0x50
#define	BPF_LSH		0x60
#define	BPF_RSH		0x70
#define	BPF_NEG		0x80
#define BPF_MOD		0x90
#define	BPF_XOR		0xa0

#define	BPF_JA		0x00
#define	BPF_JEQ		0x10
#define	BPF_JGT		0x20
#define	BPF_JGE		0x30
#define	BPF_JSET	0x40

#define BPF_SRC(code)	((code) & 0x08)
#define	BPF_K		0x00
#define	BPF_X		0x08

/* ret - BPF_K and BPF_X also apply */
#define BPF_RVAL(code)	((code) & 0x18)
#define	BPF_A		0x10

#define BPF_MISCOP(code) ((code) & 0xf8)
#define	BPF_TAX		0x00
#define	BPF_TXA		0x80

#endif /* BPF_INSNS_H */
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