/* $OpenBSD: ssh2.h,v 1.10 2006/03/25 22:22:43 djm Exp $ */

/*
 * Copyright (c) 2000 Markus Friedl.  All rights reserved.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

/*
 * draft-ietf-secsh-architecture-05.txt
 *
 *   Transport layer protocol:
 *
 *     1-19     Transport layer generic (e.g. disconnect, ignore, debug,
 *              etc)
 *     20-29    Algorithm negotiation
 *     30-49    Key exchange method specific (numbers can be reused for
 *              different authentication methods)
 *
 *   User authentication protocol:
 *
 *     50-59    User authentication generic
 *     60-79    User authentication method specific (numbers can be reused
 *              for different authentication methods)
 *
 *   Connection protocol:
 *
 *     80-89    Connection protocol generic
 *     90-127   Channel related messages
 *
 *   Reserved for client protocols:
 *
 *     128-191  Reserved
 *
 *   Local extensions:
 *
 *     192-255  Local extensions
 */

/* ranges */

#define SSH2_MSG_TRANSPORT_MIN    1
#define SSH2_MSG_TRANSPORT_MAX    49
#define SSH2_MSG_USERAUTH_MIN    50
#define SSH2_MSG_USERAUTH_MAX    79
#define SSH2_MSG_USERAUTH_PER_METHOD_MIN  60
#define SSH2_MSG_USERAUTH_PER_METHOD_MAX  SSH2_MSG_USERAUTH_MAX
#define SSH2_MSG_CONNECTION_MIN    80
#define SSH2_MSG_CONNECTION_MAX    127
#define SSH2_MSG_RESERVED_MIN    128
#define SSH2_MSG_RESERVED_MAX    191
#define SSH2_MSG_LOCAL_MIN    192
#define SSH2_MSG_LOCAL_MAX    255
#define SSH2_MSG_MIN     1
#define SSH2_MSG_MAX     255

/* transport layer: generic */

#define SSH2_MSG_DISCONNECT    1
#define SSH2_MSG_IGNORE     2
#define SSH2_MSG_UNIMPLEMENTED    3
#define SSH2_MSG_DEBUG     4
#define SSH2_MSG_SERVICE_REQUEST   5
#define SSH2_MSG_SERVICE_ACCEPT    6

/* transport layer: alg negotiation */

#define SSH2_MSG_KEXINIT    20
#define SSH2_MSG_NEWKEYS    21

/* transport layer: kex specific messages, can be reused */

#define SSH2_MSG_KEXDH_INIT    30
#define SSH2_MSG_KEXDH_REPLY    31

/* dh-group-exchange */
#define SSH2_MSG_KEX_DH_GEX_REQUEST_OLD   30
#define SSH2_MSG_KEX_DH_GEX_GROUP   31
#define SSH2_MSG_KEX_DH_GEX_INIT   32
#define SSH2_MSG_KEX_DH_GEX_REPLY   33
#define SSH2_MSG_KEX_DH_GEX_REQUEST   34

/* user authentication: generic */

#define SSH2_MSG_USERAUTH_REQUEST   50
#define SSH2_MSG_USERAUTH_FAILURE   51
#define SSH2_MSG_USERAUTH_SUCCESS   52
#define SSH2_MSG_USERAUTH_BANNER   53

/* user authentication: method specific, can be reused */

#define SSH2_MSG_USERAUTH_PK_OK    60
#define SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ  60
#define SSH2_MSG_USERAUTH_INFO_REQUEST   60
#define SSH2_MSG_USERAUTH_INFO_RESPONSE   61

/* connection protocol: generic */

#define SSH2_MSG_GLOBAL_REQUEST    80
#define SSH2_MSG_REQUEST_SUCCESS   81
#define SSH2_MSG_REQUEST_FAILURE   82

/* channel related messages */

#define SSH2_MSG_CHANNEL_OPEN    90
#define SSH2_MSG_CHANNEL_OPEN_CONFIRMATION  91
#define SSH2_MSG_CHANNEL_OPEN_FAILURE   92
#define SSH2_MSG_CHANNEL_WINDOW_ADJUST   93
#define SSH2_MSG_CHANNEL_DATA    94
#define SSH2_MSG_CHANNEL_EXTENDED_DATA   95
#define SSH2_MSG_CHANNEL_EOF    96
#define SSH2_MSG_CHANNEL_CLOSE    97
#define SSH2_MSG_CHANNEL_REQUEST   98
#define SSH2_MSG_CHANNEL_SUCCESS   99
#define SSH2_MSG_CHANNEL_FAILURE   100

/* disconnect reason code */

#define SSH2_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT 1
#define SSH2_DISCONNECT_PROTOCOL_ERROR   2
#define SSH2_DISCONNECT_KEY_EXCHANGE_FAILED  3
#define SSH2_DISCONNECT_HOST_AUTHENTICATION_FAILED 4
#define SSH2_DISCONNECT_RESERVED   4
#define SSH2_DISCONNECT_MAC_ERROR   5
#define SSH2_DISCONNECT_COMPRESSION_ERROR  6
#define SSH2_DISCONNECT_SERVICE_NOT_AVAILABLE  7
#define SSH2_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED 8
#define SSH2_DISCONNECT_HOST_KEY_NOT_VERIFIABLE  9
#define SSH2_DISCONNECT_CONNECTION_LOST   10
#define SSH2_DISCONNECT_BY_APPLICATION   11
#define SSH2_DISCONNECT_TOO_MANY_CONNECTIONS  12
#define SSH2_DISCONNECT_AUTH_CANCELLED_BY_USER  13
#define SSH2_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE 14
#define SSH2_DISCONNECT_ILLEGAL_USER_NAME  15

/* misc */

#define SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED  1
#define SSH2_OPEN_CONNECT_FAILED   2
#define SSH2_OPEN_UNKNOWN_CHANNEL_TYPE   3
#define SSH2_OPEN_RESOURCE_SHORTAGE   4

#define SSH2_EXTENDED_DATA_STDERR   1
