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For an “Accept” response the message sent is a 200 OK, while “Reject” sends a 501 response. In
either case, the response message must include the Call-ID header that was received in the
NOTIFY request.
The following two code snippets illustrate how an application would send “Accept” and “Reject”
responses to NOTIFY requests.
“Accept” Response to NOTIFY Request
void CSubNotMgr::SendSIPNotifyAccept ()
{
char str[MAX_STRING_SIZE];
sprintf(str, "<--- Sending SIP NOTIFY Accept\n");
printandlog(ALL_DEVICES, MISC, NULL, str, 0);
GC_PARM_BLKP parmblkp = NULL; // input parameter block pointer
GC_PARM_BLKP retblkp = NULL; // return parameter block
GC_INFO gc_error_info; // GlobalCall error information data
int retval = GC_SUCCESS;
gc_util_insert_parm_val(&parmblkp,
IPSET_MSG_SIP,
IPPARM_MSGTYPE,
sizeof(int),
IP_MSGTYPE_SIP_NOTIFY_ACCEPT);
// Insert SIP Call ID field
gc_util_insert_parm_ref_ex(&parmblkp,
IPSET_SIP_MSGINFO,
IPPARM_CALLID_HDR,
(unsigned long)(strlen(m_CurrentCallID)),
m_CurrentCallID);
if (parmblkp == NULL)
{
// memory allocation error
return;
}
// transmit NOTIFY message to network
retval = gc_Extension(GCTGT_GCLIB_CHAN, boardh,
IPEXTID_SENDMSG, parmblkp,
&retblkp, EV_ASYNC);
if (retval != GC_SUCCESS)
{
gc_ErrorInfo( &gc_error_info );
printf ("Error : gc_Extension() on HANDLE: 0x%lx,
GC ErrorValue: 0x%hx - %s, CCLibID: %i - %s,
CC ErrorValue: 0x%lx - %s\n", boardh,
gc_error_info.gcValue, gc_error_info.gcMsg,
gc_error_info.ccLibId, gc_error_info.ccLibName,
gc_error_info.ccValue, gc_error_info.ccMsg);
return;
}
// clean up
gc_util_delete_parm_blk(parmblkp);
m_bNotifyAcceptSent = true;
}