| /*- |
| * 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/libpcap/sll.h,v 1.7 2002/06/11 17:04:48 itojun 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@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. |
| */ |
| |
| /* |
| * 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) */ |
