sip_get_num_via(3Session Initiation Protocol Library Funcsip_get_num_via(3SIP)NAME
sip_get_num_via, sip_get_branchid - get VIA header specific attributes
SYNOPSIS
cc [ flag ... ] file ... -lsip [ library ... ]
#include <sip.h>
int sip_get_num_via(sip_msg_t sip_msg,
int *error);
char *sip_get_branchid(sip_msg_t sip_msg,
int *error);
DESCRIPTION
The sip_get_num_via() function returns the number of VIA headers in the
SIP message sip_msg.
The sip_get_branchid() function returns the branch ID value from the
topmost VIA header. The caller is responsible for freeing the returned
string.
RETURN VALUES
The sip_get_num_via() function returns the number of VIA headers on
success.
The sip_get_branchid() function returns the branch ID on success and
NULL on failure.
The value of errno is not changed by these calls in the event of an
error.
ERRORS
If the error is non-null, one of the following values is set:
EINVAL The sip_msg is NULL.
ENOENT For the sip_get_branchid function, there is no VIA header or
the VIA header has no branch parameter.
EPROTO For the sip_sip_get_trans.3sipget_branchid function, the VIA
value is invalid. The parser encountered an error or errors
while parsing the VIA header.
ENOMEM For the sip_get_branchid function, there is an error in allo‐
cating memory for the branch ID.
On success, the value of the location pointed to by error is set to 0.
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_get_num_via(3SIP)
