/*

It's not clear what purpose including this file with libnet serves. Is it just

for the DLT_ values? On systems with bpf, it should be present in the system

headers! Also, it's definitions have conflicted with the system's on AIX.

*/

/*-

 * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997

 *	The Regents of the University of California.  All rights reserved.

 *

 * This code is derived from the Stanford/CMU enet packet filter,

 * (net/enet.c) distributed as part of 4.3BSD, and code contributed

 * 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

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *      This product includes software developed by the University of

 *      California, Berkeley and its contributors.

 * 4. 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       7.1 (Berkeley) 5/7/91

 *

 * @(#) $Header: /usr/local/CVS/libnet/include/bpf.h,v 1.1.1.1 2003/06/26 21:55:10 route Exp $ (LBL)

 */

#ifndef BPF_MAJOR_VERSION

/* BSD style release date */

#define BPF_RELEASE 199606

typedef	int bpf_int32;

typedef	u_int bpf_u_int32;

/*

 * Alignment macros.  BPF_WORDALIGN rounds up to the next 

 * even multiple of BPF_ALIGNMENT. 

 */

#define BPF_ALIGNMENT sizeof(bpf_int32)

#define BPF_WORDALIGN(x) (((x)+(BPF_ALIGNMENT-1))&~(BPF_ALIGNMENT-1))

#define BPF_MAXINSNS 512

#define BPF_MAXBUFSIZE 0x8000

#define BPF_MINBUFSIZE 32

/*

 *  Structure for BIOCSETF.

 */

struct bpf_program {

	u_int bf_len;

	struct bpf_insn *bf_insns;

};

/*

 * Struct returned by BIOCGSTATS.

 */

struct bpf_stat {

	u_int bs_recv;		/* number of packets received */

	u_int bs_drop;		/* number of packets dropped */

};

/*

 * 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 {

	u_short bv_major;

	u_short bv_minor;

};

/* 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.

 */

#if (defined(sun) || defined(ibm032)) && !defined(__GNUC__)

#define	BIOCGBLEN	_IOR(B,102, u_int)

#define	BIOCSBLEN	_IOWR(B,102, u_int)

#define	BIOCSETF	_IOW(B,103, struct bpf_program)

#define	BIOCFLUSH	_IO(B,104)

#define BIOCPROMISC	_IO(B,105)

#define	BIOCGDLT	_IOR(B,106, u_int)

#define BIOCGETIF	_IOR(B,107, struct ifreq)

#define BIOCSETIF	_IOW(B,108, struct ifreq)

#define BIOCSRTIMEOUT	_IOW(B,109, struct timeval)

#define BIOCGRTIMEOUT	_IOR(B,110, struct timeval)

#define BIOCGSTATS	_IOR(B,111, struct bpf_stat)

#define BIOCIMMEDIATE	_IOW(B,112, u_int)

#define BIOCVERSION	_IOR(B,113, struct bpf_version)

#define BIOCSTCPF	_IOW(B,114, struct bpf_program)

#define BIOCSUDPF	_IOW(B,115, struct bpf_program)

#else

#define	BIOCGBLEN	_IOR('B',102, u_int)

#define	BIOCSBLEN	_IOWR('B',102, u_int)

#define	BIOCSETF	_IOW('B',103, struct bpf_program)

#define	BIOCFLUSH	_IO('B',104)

#define BIOCPROMISC	_IO('B',105)

#define	BIOCGDLT	_IOR('B',106, u_int)

#define BIOCGETIF	_IOR('B',107, struct ifreq)

#define BIOCSETIF	_IOW('B',108, struct ifreq)

#define BIOCSRTIMEOUT	_IOW('B',109, struct timeval)

#define BIOCGRTIMEOUT	_IOR('B',110, struct timeval)

#define BIOCGSTATS	_IOR('B',111, struct bpf_stat)

#define BIOCIMMEDIATE	_IOW('B',112, u_int)

#define BIOCVERSION	_IOR('B',113, struct bpf_version)

#define BIOCSTCPF	_IOW('B',114, struct bpf_program)

#define BIOCSUDPF	_IOW('B',115, struct bpf_program)

#endif

/*

 * Structure prepended to each packet.

 */

struct bpf_hdr {

	struct timeval	bh_tstamp;	/* time stamp */

	bpf_u_int32	bh_caplen;	/* length of captured portion */

	bpf_u_int32	bh_datalen;	/* original length of packet */

	u_short		bh_hdrlen;	/* length of bpf header (this struct

					   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.

 */

#ifdef KERNEL

#define SIZEOF_BPF_HDR 18

#endif

/*

 * Data-link level type codes.

 */

#define DLT_NULL	0	/* no link-layer encapsulation */

#define DLT_EN10MB	1	/* Ethernet (10Mb) */

#define DLT_EN3MB	2	/* Experimental Ethernet (3Mb) */

#define DLT_AX25	3	/* Amateur Radio AX.25 */

#define DLT_PRONET	4	/* Proteon ProNET Token Ring */

#define DLT_CHAOS	5	/* Chaos */

#define DLT_IEEE802	6	/* IEEE 802 Networks */

#define DLT_ARCNET	7	/* ARCNET */

#define DLT_SLIP	8	/* Serial Line IP */

#define DLT_PPP		9	/* Point-to-point Protocol */

#define DLT_FDDI	10	/* FDDI */

#define DLT_ATM_RFC1483	11	/* LLC/SNAP encapsulated atm */

#define DLT_RAW		12	/* raw IP */

#define DLT_SLIP_BSDOS	13	/* BSD/OS Serial Line IP */

#define DLT_PPP_BSDOS	14	/* BSD/OS Point-to-point Protocol */

/*

 * The instruction encondings.

 */

/* instruction classes */

#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

/* ld/ldx fields */

#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

/* alu/jmp fields */

#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_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

/* misc */

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

#define		BPF_TAX		0x00

#define		BPF_TXA		0x80

/*

 * The instruction data structure.

 */

struct bpf_insn {

	u_short	code;

	u_char 	jt;

	u_char 	jf;

	bpf_int32 k;

};

/*

 * Macros for insn array initializers.

 */

#define BPF_STMT(code, k) { (u_short)(code), 0, 0, k }

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

#ifdef KERNEL

extern u_int bpf_filter();

extern void bpfattach();

extern void bpf_tap();

extern void bpf_mtap();

#else

#if __STDC__

extern u_int bpf_filter(struct bpf_insn *, u_char *, u_int, u_int);

#endif

#endif

/*

 * Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST).

 */

#define BPF_MEMWORDS 16

#endif