3.3.5.2.1.1.1 Receiving a TXUSER_ASSOCIATE_MTAG_ASSOCIATED Message
When the application receives a TXUSER_ASSOCIATE_MTAG_ASSOCIATED message, the application MUST perform the following actions:
If the connection state is Awaiting Associate Response, the application MUST:
Set the connection state to Active (section 3.3.1.4.3).
Return a success result and a reference to the transaction object that is referenced by this connection's Connection-Specific Data field to the higher-layer business logic.
Otherwise, the message MUST be processed as an invalid message as specified in section 3.1.6.