sip_branchid(3SIPSession Initiation Protocol Library Functiosip_branchid(3SIP)NAMEsip_branchid - generate a RFC 3261 complaint branch ID
SYNOPSIS
cc [ flag ... ] file ... -lsip [ library ... ]
#include <sip.h>
char *sip_branchid(sip_msg_t sip_msg);
DESCRIPTION
The sip_branchid() function can be used to generate a value for the
branch parameter for a VIA header. The returned string is prefixed with
z9hG4bK to conform to RFC 3261. If sip_msg is null or sip_msg does not
have a VIA header, a random value is generated. Otherwise, the value is
generated using the MD5 hash of the VIA, FROM, CALL-ID, CSEQ headers
and the URI from the request line. The caller is responsible for free‐
ing the returned string.
RETURN VALUES
The sip_branchid() function returns a string on success and NULL on
failure.
The value of errno is not changed by these calls in the event of an
error.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Stable │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │MT-Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOlibsip(3SIP)SunOS 5.10 20 Mar 2007 sip_branchid(3SIP)