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SIP API Developer's Guide     Oracle Solaris 11 Express 11/10
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Document Information


1.  SIP Overview

2.  Oracle Solaris SIP Internals

3.  Multithreading and URI Support

4.  SIP API Functions

Stack Initialization Function

Message Allocation Functions

SIP Header Addition Functions

SIP Request and Response Creation Functions

Header and Message Copying Functions

Header and Value Deleting Functions

Header Lookup Functions

Value Retrieval and Response Description Functions

SIP ID Generating Functions

VIA Functions

SIP Message Sending Function

Processing Inbound Messages

Transaction Layer Functions

Dialog Layer Functions

URI Functions

SIP Header Value Retrieval Functions

Connection Object Functions

Miscellaneous Functions

A.  Examples of Use

B.  Programming with the SIP API

C.  Transaction Timers


VIA Functions

int sip_get_num_via(sip_msg_t sip_msg, int *error);

The sip_get_num_via() function returns the number of VIA headers that are in the SIP message.

The value of the error parameter is set to zero when this function completes successfully. When this function completes unsuccessfully, it sets the value of the error parameter to the appropriate error value.

char *sip_get_branchid(sip_msg_t sip_msg, int *error);

The *sip_get_branchid() function returns the value of the branch parameter in the topmost VIA header in the SIP message. The calling thread must free the string that this function returns.