1/* @(#) $Header: /tcpdump/master/tcpdump/l2tp.h,v 1.5 2001-11-05 10:03:27 guy Exp $ (LBL) */ 2/* 3 * Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that: (1) source code distributions 8 * retain the above copyright notice and this paragraph in its entirety, (2) 9 * distributions including binary code include the above copyright notice and 10 * this paragraph in its entirety in the documentation or other materials 11 * provided with the distribution, and (3) all advertising materials mentioning 12 * features or use of this software display the following acknowledgement: 13 * ``This product includes software developed by the University of California, 14 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 15 * the University nor the names of its contributors may be used to endorse 16 * or promote products derived from this software without specific prior 17 * written permission. 18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 19 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 21 * 22 * L2TP support contributed by Motonori Shindo (mshindo@mshindo.net) 23 */ 24 25 26#define L2TP_FLAG_TYPE 0x8000 /* Type (0=Data, 1=Control) */ 27#define L2TP_FLAG_LENGTH 0x4000 /* Length */ 28#define L2TP_FLAG_SEQUENCE 0x0800 /* Sequence */ 29#define L2TP_FLAG_OFFSET 0x0200 /* Offset */ 30#define L2TP_FLAG_PRIORITY 0x0100 /* Priority */ 31 32#define L2TP_VERSION_MASK 0x000f /* Version Mask */ 33#define L2TP_VERSION_L2F 0x0001 /* L2F */ 34#define L2TP_VERSION_L2TP 0x0002 /* L2TP */ 35 36#define L2TP_AVP_HDR_FLAG_MANDATORY 0x8000 /* Mandatory Flag */ 37#define L2TP_AVP_HDR_FLAG_HIDDEN 0x4000 /* Hidden Flag */ 38#define L2TP_AVP_HDR_LEN_MASK 0x03ff /* Length Mask */ 39 40#define L2TP_FRAMING_CAP_SYNC_MASK 0x00000001 /* Synchronous */ 41#define L2TP_FRAMING_CAP_ASYNC_MASK 0x00000002 /* Asynchronous */ 42 43#define L2TP_FRAMING_TYPE_SYNC_MASK 0x00000001 /* Synchronous */ 44#define L2TP_FRAMING_TYPE_ASYNC_MASK 0x00000002 /* Asynchronous */ 45 46#define L2TP_BEARER_CAP_DIGITAL_MASK 0x00000001 /* Digital */ 47#define L2TP_BEARER_CAP_ANALOG_MASK 0x00000002 /* Analog */ 48 49#define L2TP_BEARER_TYPE_DIGITAL_MASK 0x00000001 /* Digital */ 50#define L2TP_BEARER_TYPE_ANALOG_MASK 0x00000002 /* Analog */ 51 52/* Authen Type */ 53#define L2TP_AUTHEN_TYPE_RESERVED 0x0000 /* Reserved */ 54#define L2TP_AUTHEN_TYPE_TEXTUAL 0x0001 /* Textual username/password exchange */ 55#define L2TP_AUTHEN_TYPE_CHAP 0x0002 /* PPP CHAP */ 56#define L2TP_AUTHEN_TYPE_PAP 0x0003 /* PPP PAP */ 57#define L2TP_AUTHEN_TYPE_NO_AUTH 0x0004 /* No Authentication */ 58#define L2TP_AUTHEN_TYPE_MSCHAPv1 0x0005 /* MSCHAPv1 */ 59 60#define L2TP_PROXY_AUTH_ID_MASK 0x00ff 61 62 63