mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
125 lines
5.4 KiB
C
125 lines
5.4 KiB
C
/*-
|
|
* 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) */
|