Applications must register the interfaces in this section with the SIP library.
The stack calls this routine to send SIP messages.
The application must provide functions to increment and decrement reference counts on a connection object.
The application must register functions to query the following attributes of a connection object:
The connection is a byte-stream
The connection is reliable
Remote endpoint information
Local endpoint information
The transport type
The application can register the following timer attributes that the API uses to obtain timer values for a connection object:
This value defines the RTT estimate
This value defines the maximum retrieval interval for non-INVITE requests and INVITE responses
This value defines the maximum duration that a message remains in the network
This value defines the wait time for response retransmits
If an application does not specify values for these timer attributes, the stack uses default values.