/*-

 * 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.

 */

/*

 * For captures on Linux cooked sockets, we construct a fake header

 * that includes:

 *

 *	a 2-byte "packet type" which is one of:

 *

 *		LINUX_SLL_HOST		packet was sent to us

 *		LINUX_SLL_BROADCAST	packet was broadcast

 *		LINUX_SLL_MULTICAST	packet was multicast

 *		LINUX_SLL_OTHERHOST	packet was sent to somebody else

 *		LINUX_SLL_OUTGOING	packet was sent *by* us;

 *

 *	a 2-byte Ethernet protocol field;

 *

 *	a 2-byte link-layer type;

 *

 *	a 2-byte link-layer address length;

 *

 *	an 8-byte source link-layer address, whose actual length is

 *	specified by the previous value.

 *

 * All fields except for the link-layer address are in network byte order.

 *

 * DO NOT change the layout of this structure, or change any of the

 * LINUX_SLL_ values below.  If you must change the link-layer header

 * for a "cooked" Linux capture, introduce a new DLT_ type (ask

 * "tcpdump-workers@lists.tcpdump.org" for one, so that you don't give it

 * a value that collides with a value already being used), and use the

 * new header in captures of that type, so that programs that can

 * handle DLT_LINUX_SLL captures will continue to handle them correctly

 * without any change, and so that capture files with different headers

 * can be told apart and programs that read them can dissect the

 * packets in them.

 */

#ifndef lib_pcap_sll_h

#define lib_pcap_sll_h

#include <pcap/pcap-inttypes.h>

/*

 * A DLT_LINUX_SLL fake link-layer header.

 */

#define SLL_HDR_LEN	16		/* total header length */

#define SLL_ADDRLEN	8		/* length of address field */

struct sll_header {

	uint16_t sll_pkttype;		/* packet type */

	uint16_t sll_hatype;		/* link-layer address type */

	uint16_t sll_halen;		/* link-layer address length */

	uint8_t  sll_addr[SLL_ADDRLEN];	/* link-layer address */

	uint16_t sll_protocol;		/* protocol */

};

/*

 * A DLT_LINUX_SLL2 fake link-layer header.

 */

#define SLL2_HDR_LEN	20		/* total header length */

struct sll2_header {

	uint16_t sll2_protocol;			/* protocol */

	uint16_t sll2_reserved_mbz;		/* reserved - must be zero */

	uint32_t sll2_if_index;			/* 1-based interface index */

	uint16_t sll2_hatype;			/* link-layer address type */

	uint8_t  sll2_pkttype;			/* packet type */

	uint8_t  sll2_halen;			/* link-layer address length */

	uint8_t  sll2_addr[SLL_ADDRLEN];	/* link-layer address */

};

/*

 * The LINUX_SLL_ values for "sll_pkttype" and LINUX_SLL2_ values for

 * "sll2_pkttype"; these correspond to the PACKET_ values on Linux,

 * which are defined by a header under include/uapi in the current

 * kernel source, and are thus not going to change on Linux.  We

 * define them here so that they're available even on systems other

 * than Linux.

 */

#define LINUX_SLL_HOST		0

#define LINUX_SLL_BROADCAST	1

#define LINUX_SLL_MULTICAST	2

#define LINUX_SLL_OTHERHOST	3

#define LINUX_SLL_OUTGOING	4

/*

 * The LINUX_SLL_ values for "sll_protocol" and LINUX_SLL2_ values for

 * "sll2_protocol"; these correspond to the ETH_P_ values on Linux, but

 * are defined here so that they're available even on systems other than

 * Linux.  We assume, for now, that the ETH_P_ values won't change in

 * Linux; if they do, then:

 *

 *	if we don't translate them in "pcap-linux.c", capture files

 *	won't necessarily be readable if captured on a system that

 *	defines ETH_P_ values that don't match these values;

 *

 *	if we do translate them in "pcap-linux.c", that makes life

 *	unpleasant for the BPF code generator, as the values you test

 *	for in the kernel aren't the values that you test for when

 *	reading a capture file, so the fixup code run on BPF programs

 *	handed to the kernel ends up having to do more work.

 *

 * Add other values here as necessary, for handling packet types that

 * might show up on non-Ethernet, non-802.x networks.  (Not all the ones

 * in the Linux "if_ether.h" will, I suspect, actually show up in

 * captures.)

 */

#define LINUX_SLL_P_802_3	0x0001	/* Novell 802.3 frames without 802.2 LLC header */

#define LINUX_SLL_P_802_2	0x0004	/* 802.2 frames (not D/I/X Ethernet) */

#define LINUX_SLL_P_CAN		0x000C	/* CAN frames, with SocketCAN pseudo-headers */

#define LINUX_SLL_P_CANFD	0x000D	/* CAN FD frames, with SocketCAN pseudo-headers */

#endif