SIP_HEADER_DELETED_VAL
if (from->sip_header_state == SIP_HEADER_DELETED_VAL) {
if (header->sip_header_state == SIP_HEADER_DELETED_VAL) {
if (_sip_header->sip_header_state == SIP_HEADER_DELETED_VAL) {
SIP_HEADER_DELETED_VAL) {
_sip_header->sip_header_state = SIP_HEADER_DELETED_VAL;