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'\" te .\" Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved. .TH sip_add_param 3SIP "25 Jan 2007" "Oracle Solaris 11.4" "Session Initiation Protocol Library Functions" .SH NAME sip_add_param \- add a parameter to the SIP header .SH SYNOPSIS .LP .nf \fBcc\fR [ \fIflag\fR ... ] \fIfile\fR ... \fB-lsip\fR [ \fIlibrary\fR ... ] #include <sip.h> \fBsip_header_t\fR \fIsip_add_param\fR(\fBsip_header_t\fR \fIsip_header\fR, \fBchar *\fR\fIparam\fR, \fBint *\fR\fIerror\fR); .fi .SH DESCRIPTION .sp .LP The \fBsip_add_param()\fR function adds the parameter provided in \fIparam\fR to the \fBSIP\fR header \fIsip_header\fR. 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 \fBSIP\fR header need to take note of this. If error is non-null, it (the location pointer by the variable) is set to \fB0\fR on success and the appropriate error value on error. .SH RETURN VALUES .sp .LP The \fBsip_add_param()\fR 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 \fB0\fR and the appropriate error value on failure. .SH ERRORS .sp .LP On failure, functions that return an error value may return one of the following: .sp .ne 2 .mk .na \fB\fBEINVAL\fR\fR .ad .RS 10n .rt Mandatory parameters are not provided, i.e. null. .sp For \fBsip_add_param()\fR, the header to be modified is marked deleted. .RE .sp .ne 2 .mk .na \fB\fBEPERM\fR\fR .ad .RS 10n .rt The message cannot be modified. .RE .sp .ne 2 .mk .na \fB\fBENOMEM\fR\fR .ad .RS 10n .rt There is an error allocating memory for creating headers/parameters. .RE .SH ATTRIBUTES .sp .LP See \fBattributes\fR(7) for descriptions of the following attributes: .sp .TS tab( ) box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) . ATTRIBUTE TYPE ATTRIBUTE VALUE _ Interface Stability Committed _ MT-Level MT-Safe .TE .sp .SH SEE ALSO .sp .LP \fBlibsip\fR(3LIB)