12949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project/*- 22949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 32949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * The Regents of the University of California. All rights reserved. 42949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 52949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * This code is derived from the Stanford/CMU enet packet filter, 62949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * (net/enet.c) distributed as part of 4.3BSD, and code contributed 72949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence 82949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * Berkeley Laboratory. 92949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 102949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * Redistribution and use in source and binary forms, with or without 112949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * modification, are permitted provided that the following conditions 122949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * are met: 132949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 142949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * notice, this list of conditions and the following disclaimer. 152949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 162949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 172949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * documentation and/or other materials provided with the distribution. 182949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 3. All advertising materials mentioning features or use of this software 192949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * must display the following acknowledgement: 202949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * This product includes software developed by the University of 212949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * California, Berkeley and its contributors. 222949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 4. Neither the name of the University nor the names of its contributors 232949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * may be used to endorse or promote products derived from this software 242949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * without specific prior written permission. 252949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 262949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 272949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 282949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 292949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 302949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 312949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 322949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 332949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 342949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 352949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 362949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * SUCH DAMAGE. 372949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 382949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * @(#) $Header: /tcpdump/master/tcpdump/sll.h,v 1.7 2002/12/11 07:14:11 guy Exp $ (LBL) 392949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project */ 402949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 412949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project/* 422949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * For captures on Linux cooked sockets, we construct a fake header 432949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * that includes: 442949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 452949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * a 2-byte "packet type" which is one of: 462949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 472949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * LINUX_SLL_HOST packet was sent to us 482949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * LINUX_SLL_BROADCAST packet was broadcast 492949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * LINUX_SLL_MULTICAST packet was multicast 502949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * LINUX_SLL_OTHERHOST packet was sent to somebody else 512949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * LINUX_SLL_OUTGOING packet was sent *by* us; 522949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 532949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * a 2-byte Ethernet protocol field; 542949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 552949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * a 2-byte link-layer type; 562949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 572949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * a 2-byte link-layer address length; 582949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 592949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * an 8-byte source link-layer address, whose actual length is 602949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * specified by the previous value. 612949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 622949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * All fields except for the link-layer address are in network byte order. 632949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 642949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * DO NOT change the layout of this structure, or change any of the 652949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * LINUX_SLL_ values below. If you must change the link-layer header 662949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * for a "cooked" Linux capture, introduce a new DLT_ type (ask 672949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * "tcpdump-workers@tcpdump.org" for one, so that you don't give it a 682949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * value that collides with a value already being used), and use the 692949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * new header in captures of that type, so that programs that can 702949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * handle DLT_LINUX_SLL captures will continue to handle them correctly 712949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * without any change, and so that capture files with different headers 722949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * can be told apart and programs that read them can dissect the 732949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * packets in them. 742949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 752949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * This structure, and the #defines below, must be the same in the 762949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * libpcap and tcpdump versions of "sll.h". 772949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project */ 782949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 792949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project/* 802949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * A DLT_LINUX_SLL fake link-layer header. 812949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project */ 822949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#define SLL_HDR_LEN 16 /* total header length */ 832949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#define SLL_ADDRLEN 8 /* length of address field */ 842949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 852949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Projectstruct sll_header { 862949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project u_int16_t sll_pkttype; /* packet type */ 872949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project u_int16_t sll_hatype; /* link-layer address type */ 882949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project u_int16_t sll_halen; /* link-layer address length */ 892949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project u_int8_t sll_addr[SLL_ADDRLEN]; /* link-layer address */ 902949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project u_int16_t sll_protocol; /* protocol */ 912949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project}; 922949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 932949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project/* 942949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * The LINUX_SLL_ values for "sll_pkttype"; these correspond to the 952949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * PACKET_ values on Linux, but are defined here so that they're 962949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * available even on systems other than Linux, and so that they 972949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * don't change even if the PACKET_ values change. 982949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project */ 992949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#define LINUX_SLL_HOST 0 1002949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#define LINUX_SLL_BROADCAST 1 1012949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#define LINUX_SLL_MULTICAST 2 1022949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#define LINUX_SLL_OTHERHOST 3 1032949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#define LINUX_SLL_OUTGOING 4 1042949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 1052949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project/* 1062949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * The LINUX_SLL_ values for "sll_protocol"; these correspond to the 1072949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * ETH_P_ values on Linux, but are defined here so that they're 1082949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * available even on systems other than Linux. We assume, for now, 1092949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * that the ETH_P_ values won't change in Linux; if they do, then: 1102949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 1112949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * if we don't translate them in "pcap-linux.c", capture files 1122949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * won't necessarily be readable if captured on a system that 1132949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * defines ETH_P_ values that don't match these values; 1142949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 1152949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * if we do translate them in "pcap-linux.c", that makes life 1162949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * unpleasant for the BPF code generator, as the values you test 1172949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * for in the kernel aren't the values that you test for when 1182949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * reading a capture file, so the fixup code run on BPF programs 1192949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * handed to the kernel ends up having to do more work. 1202949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 1212949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * Add other values here as necessary, for handling packet types that 1222949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * might show up on non-Ethernet, non-802.x networks. (Not all the ones 1232949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * in the Linux "if_ether.h" will, I suspect, actually show up in 1242949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * captures.) 1252949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project */ 1262949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#define LINUX_SLL_P_802_3 0x0001 /* Novell 802.3 frames without 802.2 LLC header */ 1272949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#define LINUX_SLL_P_802_2 0x0004 /* 802.2 frames (not D/I/X Ethernet) */ 128