HP-UX C SIP Stack Programmer's Guide (February 2008)

66 HP-UX C SIP Stack Programmer’s Guide
Using the Outbound Message Mechanism
/*===================================================================================*/
RvStatus AppCallModify(IN RvSipCallLegHandle hCallLeg)
{
RvStatus rv = RV_OK;
RvSipCallLegInviteHandle hReInvite;
/* 1. Create a re-INVITE object */
rv = RvSipCallLegReInviteCreate(hCallLeg, NULL, &hReInvite);
if (RV_OK != rv)
{
printf("RvSipCallLegReInviteCreate() failed (rv=%d)", rv);
return rv;
}
/* 2. Here we can set parameters to the call-leg outbound msg */
/* 3. Send the re-INVITE request */
rv = RvSipCallLegReInviteRequest(hCallLeg, hReInvite);
if (RV_OK != rv)
{
printf("RvSipCallLegReInviteRequest() failed (rv=%d)", rv);
return rv;
}
return rv;
}
/*===================================================================================*/
USING THE
OUTBOUND
MESSAGE
MECHANISM
The outbound message mechanism enables adding fields to the message before
calling the function that actually sends the message. The following sample code
demonstrates how to add a “Subject: Hello” header to the initial INVITE
request.
Note In this sample, the return value of the SIP Stack API functions is not
checked for simplicity. You must always check return values.
/*===================================================================*/
void AppConnectCallWithSubject(IN RvSipCallLegMgrHandle hCallLegMgr)
{
RvSipCallLegHandle hCallLeg;
RvSipMsgHandle hMsg;
RvSipOtherHeaderHandle hSubject;