The VoipMediaEngine..::.SIP_MESSAGE_IMMEDIATE_DATA type exposes the following members.
Application software can set this value to non zero value if it wants the media engine to ignore the SIP message. Any SIP message that is "tagged" to be ignored will not be processed by the media engine.
If the SIP message is to be transmitted, application software can specify a new destination IP address or host name of where the SIP message should be sent.
If the SIP message is to be transmitted, application software can specify a new destination UDP port of where the SIP message should be sent.
This value will be set to non zero if the SIP message has been received. Set to zero if the SIP message is being transmitted.
The string reference that contains the raw ASCII SIP message. Application software must not directly alter the SIP message buffer referenced by this parameter.