te
 Copyright (c) 2007, Sun Microsystems, Inc. All Rights Reserved
 The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
 You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
 When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
 sip_add_param 3SIP "25 Jan 2007" "SunOS 5.11" "Session Initiation Protocol Library Functions"
 NAME
sip_add_param - add a parameter to the SIP header

 SYNOPSIS


cc [ flag ... ] file ... -lsip [ library ... ]
#include <sip.h>

sip_header_t sip_add_param(sip_header_t sip_header, char *param, 
 int *error);




 DESCRIPTION

The sip_add_param() function adds the parameter provided in param
to the SIP header sip_header. The function returns the header with
the parameter added. A new header is created as a result of adding the
parameter and the old header is marked deleted. Applications with multiple
threads working on the same SIP header need to take note of this. If
error is non-null, it (the location pointer by the variable) is set to 0
on success and the appropriate error value on error.

 RETURN VALUES

The sip_add_param() function returns the new header on success and null
on failure. Further, if error is non-null, then on success the value in the
location pointed by error is 0 and the appropriate error value on
failure.

 ERRORS

On failure, functions that return an error value may return one of the
following:


EINVAL


Mandatory parameters are not provided, i.e. null.
For sip_add_param(), the header to be modified is marked deleted.





EPERM


The message cannot be modified.





ENOMEM


There is an error allocating memory for creating headers/parameters.




 ATTRIBUTES

See attributes(5) for descriptions of the following attributes:







ATTRIBUTE TYPEATTRIBUTE VALUE
Interface StabilityCommitted
MT-LevelMT-Safe



 SEE ALSO

libsip(3LIB)