If the Will Flag is set to 1 this indicates that, if the Connect request is accepted, a Will Message MUST
be stored on the Server and associated with the Network Connection. The Will Message MUST be published
when the Network Connection is subsequently closed unless the Will Message has been deleted by the Server
on receipt of a DISCONNECT Packet.
Situations in which the Will Message is published include, but are not limited to:
An I/O error or network failure detected by the Server.
The Client fails to communicate within the Keep Alive time.
The Client closes the Network Connection without first sending a DISCONNECT Packet.
The Server closes the Network Connection because of a protocol error.
If the Will Flag is set to 1, the Will QoS and Will Retain fields in the Connect Flags will be used by
the Server, and the Will Topic and Will Message fields MUST be present in the payload.
The Will Message MUST be removed from the stored Session state in the Server once it has been published
or the Server has received a DISCONNECT packet from the Client.
If the Will Flag is set to 0 the Will QoS and Will Retain fields in the Connect Flags MUST be set to zero
and the Will Topic and Will Message fields MUST NOT be present in the payload.
If the Will Flag is set to 0, a Will Message MUST NOT be published when this Network Connection ends
If the Will Flag is set to 1 this indicates that, if the Connect request is accepted, a Will Message MUST be stored on the Server and associated with the Network Connection. The Will Message MUST be published when the Network Connection is subsequently closed unless the Will Message has been deleted by the Server on receipt of a DISCONNECT Packet.
Situations in which the Will Message is published include, but are not limited to: An I/O error or network failure detected by the Server. The Client fails to communicate within the Keep Alive time. The Client closes the Network Connection without first sending a DISCONNECT Packet. The Server closes the Network Connection because of a protocol error.
If the Will Flag is set to 1, the Will QoS and Will Retain fields in the Connect Flags will be used by the Server, and the Will Topic and Will Message fields MUST be present in the payload.
The Will Message MUST be removed from the stored Session state in the Server once it has been published or the Server has received a DISCONNECT packet from the Client.
If the Will Flag is set to 0 the Will QoS and Will Retain fields in the Connect Flags MUST be set to zero and the Will Topic and Will Message fields MUST NOT be present in the payload.
If the Will Flag is set to 0, a Will Message MUST NOT be published when this Network Connection ends