SIP_RECORD_ROUTE
SIP_RECORD_ROUTE, route_params));
rrhdr = sip_search_for_header(sip_msg, SIP_RECORD_ROUTE, NULL);
rrhdr = sip_search_for_header(sip_msg, SIP_RECORD_ROUTE, rrhdr);
if (sip_search_for_header(_sip_request, SIP_RECORD_ROUTE, NULL) !=
SIP_RECORD_ROUTE) != 0) {