/*- * 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. * * @(#) $Header: /tcpdump/master/tcpdump/sll.h,v 1.7.6.1 2008-05-30 01:38:21 guy Exp $ (LBL) *//* * 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. * * This structure, and the #defines below, must be the same in the * libpcap and tcpdump versions of "sll.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 {	u_int16_t	sll_pkttype;	/* packet type */	u_int16_t	sll_hatype;	/* link-layer address type */	u_int16_t	sll_halen;	/* link-layer address length */	u_int8_t	sll_addr[SLL_ADDRLEN];	/* link-layer address */	u_int16_t	sll_protocol;	/* protocol */};/* * The LINUX_SLL_ values for "sll_pkttype"; these correspond to the * PACKET_ values on Linux, but are defined here so that they're * available even on systems other than Linux, and so that they * don't change even if the PACKET_ values change. */#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"; 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) */