/*
 * draft-ietf-secsh-architecture-04.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
 */

/* 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

/* 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_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

/* 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