bpf.h revision 0a0e9771ca0211c15f3ac4466b661c145feeb9e4
/* $NetBSD: bpf.h,v 1.50 2009/01/13 19:10:52 christos Exp $ */
/*
* Copyright (c) 1990, 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
* Berkeley Laboratory.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)bpf.h 8.2 (Berkeley) 1/9/95
* @(#) Header: bpf.h,v 1.36 97/06/12 14:29:53 leres Exp (LBL)
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _NET_BPF_H_
#define _NET_BPF_H_
/* BSD style release date */
#define BPF_RELEASE 199606
typedef int bpf_int32;
typedef uint_t bpf_uint_t32;
typedef uint_t bpf_u_int32;
/*
* Alignment macros. BPF_WORDALIGN rounds up to the next
* even multiple of BPF_ALIGNMENT.
*/
#define BPF_ALIGNMENT sizeof (uint32_t)
#define BPF_MAXINSNS 512
#define BPF_MINBUFSIZE 32
/*
* Structure for BIOCSETF.
*/
struct bpf_program {
};
struct bpf_program32 {
};
/*
* Struct returned by BIOCGSTATS and net.bpf.stats sysctl.
*/
struct bpf_stat {
};
/*
* Struct returned by BIOCGSTATSOLD.
*/
struct bpf_stat_old {
};
/*
* Struct return by BIOCVERSION. This represents the version number of
* the filter language described by the instruction encodings below.
* bpf understands a program iff kernel_major == filter_major &&
* kernel_minor >= filter_minor, that is, if the value returned by the
* running kernel has the same major number and a minor number equal
* equal to or less than the filter being downloaded. Otherwise, the
* results are undefined, meaning an error may be returned or packets
* may be accepted haphazardly.
* It has nothing to do with the source code version.
*/
struct bpf_version {
};
/* Current version number of filter architecture. */
#define BPF_MAJOR_VERSION 1
#define BPF_MINOR_VERSION 1
/*
* BPF ioctls
*
* The first set is for compatibility with Sun's pcc style
* header files. If your using gcc, we assume that you
* have run fixincludes so the latter set should work.
*/
/*
*/
/*
* Structure prepended to each packet. This is "wire" format, so we
* cannot change it unfortunately to 64 bit times on 32 bit systems [yet].
*/
struct bpf_timeval {
};
struct bpf_hdr {
/* plus alignment padding) */
};
/*
* Because the structure above is not a multiple of 4 bytes, some compilers
* will insist on inserting padding; hence, sizeof(struct bpf_hdr) won't work.
* Only the kernel needs to know about it; applications use bh_hdrlen.
* XXX To save a few bytes on 32-bit machines, we avoid end-of-struct
* XXX padding by using the size of the header data elements. This is
* XXX fail-safe: on new machines, we just use the 'safe' sizeof.
*/
#ifdef _KERNEL
#define SIZEOF_BPF_HDR 18
#else
#define SIZEOF_BPF_HDR sizeof (struct bpf_hdr)
#endif
#endif
/* Pull in data-link level type codes. */
/*
* The instruction encodings.
*/
/* instruction classes */
#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_W 0x00
#define BPF_H 0x08
#define BPF_B 0x10
#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_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_JA 0x00
#define BPF_JEQ 0x10
#define BPF_JGT 0x20
#define BPF_JGE 0x30
#define BPF_JSET 0x40
#define BPF_K 0x00
#define BPF_X 0x08
/* ret - BPF_K and BPF_X also apply */
#define BPF_A 0x10
/* misc */
#define BPF_TAX 0x00
#define BPF_TXA 0x80
/*
* The instruction data structure.
*/
struct bpf_insn {
uint32_t k;
};
/*
* Macros for insn array initializers.
*/
/*
* Structure to retrieve available DLTs for the interface.
*/
struct bpf_dltlist {
};
struct bpf_dltlist32 {
};
#ifdef _KERNEL
#include <sys/dls_impl.h>
extern int bpf_validate(struct bpf_insn *, int);
#endif /* _KERNEL */
/*
* Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST).
*/
#define BPF_MEMWORDS 16
#endif /* !_NET_BPF_H_ */