sip_get_num_via(3SIP)				   Session Initiation Protocol Library Functions			     sip_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 allocating 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	     |Committed 		   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       libsip(3LIB)

SunOS 5.11							    23 Jan 2007 					     sip_get_num_via(3SIP)