NG_BTSOCKET_L2CAP_DISCONNECTING
pcb->state != NG_BTSOCKET_L2CAP_DISCONNECTING)
if (pcb->state == NG_BTSOCKET_L2CAP_DISCONNECTING) {
pcb->state = NG_BTSOCKET_L2CAP_DISCONNECTING;
case NG_BTSOCKET_L2CAP_DISCONNECTING: