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90 lines
2.6 KiB
Go
Executable File
90 lines
2.6 KiB
Go
Executable File
// Copyright (c) 2014 The SurgeMQ Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package message
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// ConnackCode is the type representing the return code in the CONNACK message,
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// returned after the initial CONNECT message
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type ConnackCode byte
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const (
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// Connection accepted
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ConnectionAccepted ConnackCode = iota
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// The Server does not support the level of the MQTT protocol requested by the Client
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ErrInvalidProtocolVersion
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// The Client identifier is correct UTF-8 but not allowed by the server
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ErrIdentifierRejected
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// The Network Connection has been made but the MQTT service is unavailable
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ErrServerUnavailable
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// The data in the user name or password is malformed
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ErrBadUsernameOrPassword
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// The Client is not authorized to connect
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ErrNotAuthorized
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)
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// Value returns the value of the ConnackCode, which is just the byte representation
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func (this ConnackCode) Value() byte {
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return byte(this)
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}
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// Desc returns the description of the ConnackCode
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func (this ConnackCode) Desc() string {
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switch this {
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case 0:
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return "Connection accepted"
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case 1:
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return "The Server does not support the level of the MQTT protocol requested by the Client"
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case 2:
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return "The Client identifier is correct UTF-8 but not allowed by the server"
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case 3:
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return "The Network Connection has been made but the MQTT service is unavailable"
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case 4:
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return "The data in the user name or password is malformed"
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case 5:
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return "The Client is not authorized to connect"
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}
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return ""
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}
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// Valid checks to see if the ConnackCode is valid. Currently valid codes are <= 5
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func (this ConnackCode) Valid() bool {
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return this <= 5
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}
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// Error returns the corresonding error string for the ConnackCode
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func (this ConnackCode) Error() string {
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switch this {
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case 0:
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return "Connection accepted"
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case 1:
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return "Connection Refused, unacceptable protocol version"
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case 2:
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return "Connection Refused, identifier rejected"
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case 3:
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return "Connection Refused, Server unavailable"
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case 4:
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return "Connection Refused, bad user name or password"
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case 5:
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return "Connection Refused, not authorized"
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}
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return "Unknown error"
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}
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