UNSUBACK
Unsubscribe Acknowledgement
The UNSUBACK message is sent from the broker to the client to confirm
receipt of an UNSUBSCRIBE message.
Fixed Header
See the Fixed Header section for more information,
| bit |
7
|
6
|
5
|
4
|
3
|
2
|
1
|
0
|
| byte 1 |
Message Type (11)
|
DUP flag
|
QoS level
|
RETAIN
|
| |
1
|
0
|
1
|
1
|
x
|
x
|
x
|
x
|
| byte 2 |
Remaining Length (2)
|
|
|
0
|
0
|
0
|
0
|
0
|
0
|
1
|
0
|
QoS level
The QoS level is not used for the UNSUBACK message.
DUP flag
The DUP flag is not used for the UNSUBACK message.
RETAIN flag
The RETAIN flag is not used for the UNSUBACK message.
Remaining Length
The Remaining Length is the length of the Variable Header (2 bytes)
Variable Header
The Variable Header portion of the UNSUBACK message contains the Message
Identifier of the UNSUBSCRIBE message that
is being acknowledged.
See the Variable Header section for
more information.
| bit |
7
|
6
|
5
|
4
|
3
|
2
|
1
|
0
|
| byte 1 |
Message Identifier MSB
|
| byte 2 |
Message Identifier LSB
|
Payload
NONE
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Last Modified: 19-Oct-99