l2tp.h

This directory contains source code for tcpdump, a tool for network monitoring and data acquisition

/*
 * Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that: (1) source code distributions
 * retain the above copyright notice and this paragraph in its entirety, (2)
 * distributions including binary code include the above copyright notice and
 * this paragraph in its entirety in the documentation or other materials
 * provided with the distribution, and (3) all advertising materials mentioning
 * features or use of this software display the following acknowledgement:
 * ``This product includes software developed by the University of California,
 * Lawrence Berkeley Laboratory and its contributors.'' 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * L2TP support contributed by Motonori Shindo ([e-mail])
 */


#define L2TP_FLAG_TYPE                0x8000     /* Type (0=Data, 1=Control) */
#define L2TP_FLAG_LENGTH              0x4000     /* Length */
#define L2TP_FLAG_SEQUENCE            0x0800     /* Sequence */
#define L2TP_FLAG_OFFSET              0x0200     /* Offset */
#define L2TP_FLAG_PRIORITY            0x0100     /* Priority */

#define L2TP_VERSION_MASK             0x000f     /* Version Mask */
#define L2TP_VERSION_L2F              0x0001     /* L2F */
#define L2TP_VERSION_L2TP             0x0002     /* L2TP */

#define L2TP_AVP_HDR_FLAG_MANDATORY   0x8000     /* Mandatory Flag */
#define L2TP_AVP_HDR_FLAG_HIDDEN      0x4000     /* Hidden Flag */
#define L2TP_AVP_HDR_LEN_MASK         0x03ff     /* Length Mask */

#define L2TP_FRAMING_CAP_SYNC_MASK    0x00000001 /* Synchronous */
#define L2TP_FRAMING_CAP_ASYNC_MASK   0x00000002 /* Asynchronous */

#define L2TP_FRAMING_TYPE_SYNC_MASK   0x00000001 /* Synchronous */
#define L2TP_FRAMING_TYPE_ASYNC_MASK  0x00000002 /* Asynchronous */

#define L2TP_BEARER_CAP_DIGITAL_MASK  0x00000001 /* Digital */
#define L2TP_BEARER_CAP_ANALOG_MASK   0x00000002 /* Analog */

#define L2TP_BEARER_TYPE_DIGITAL_MASK 0x00000001 /* Digital */
#define L2TP_BEARER_TYPE_ANALOG_MASK  0x00000002 /* Analog */

/* Authen Type
 */
#define L2TP_AUTHEN_TYPE_RESERVED     0x0000  /* Reserved */
#define L2TP_AUTHEN_TYPE_TEXTUAL      0x0001  /* Textual username/password exchange */
#define L2TP_AUTHEN_TYPE_CHAP         0x0002  /* PPP CHAP */
#define L2TP_AUTHEN_TYPE_PAP          0x0003  /* PPP PAP */
#define L2TP_AUTHEN_TYPE_NO_AUTH      0x0004  /* No Authentication */
#define L2TP_AUTHEN_TYPE_MSCHAP       0x0005  /* MSCHAPv1 */

#define L2TP_PROXY_AUTH_ID_MASK       0x00ff


struct l2tp_avp_vec {
       const char *name;
       void (*print)(const u_char *, u_int);
     };
                
struct l2tp_call_errors {
       u_short reserved;
       u_int   crc_errs;
       u_int   framing_errs;
       u_int   hardware_overruns;
       u_int   buffer_overruns;
       u_int   timeout_errs;
       u_int   alignment_errs;
     };

struct l2tp_accm {
       u_short reserved;
       u_int   send_accm;
       u_int   recv_accm;
     };