5.6.2. Events

Transitions and actions in the automaton are caused by events. In this section, we will ignore the I- and R- prefixes, since the actual event would be identical, but it would occur on one of two possible connections.

Start

The Diameter application has signaled that a connection should be initiated with the peer.

R-Conn-CER

An acknowledgement is received stating that the transport connection has been established, and the associated CER has arrived.

Rcv-Conn-Ack

A positive acknowledgement is received confirming that the transport connection is established.

Rcv-Conn-Nack

A negative acknowledgement was received stating that the transport connection was not established.

Timeout

An application-defined timer has expired while waiting for some event.

Rcv-CER

A CER message from the peer was received.

Rcv-CEA

A CEA message from the peer was received.

Rcv-Non-CEA

A message, other than a CEA, from the peer was received.

Peer-Disc

A disconnection indication from the peer was received.

Rcv-DPR

A DPR message from the peer was received.

Rcv-DPA

A DPA message from the peer was received.

Win-Election

An election was held, and the local node was the winner.

Send-Message

A message is to be sent.

Rcv-Message

A message other than CER, CEA, DPR, DPA, DWR, or DWA was received.

Stop

The Diameter application has signaled that a connection should be terminated (e.g., on system shutdown).