/*      $OpenBSD: l2tp.h,v 1.1 2000/01/16 10:54:58 jakob Exp $  */

/*
 * 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 (mshindo@ascend.co.jp)
 */


#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;
};