NG_BTSOCKET_L2CAP_CFG_OUT_SENT
pcb->cfg_state &= ~NG_BTSOCKET_L2CAP_CFG_OUT_SENT;
if (!(pcb->cfg_state & NG_BTSOCKET_L2CAP_CFG_OUT_SENT)) {
pcb->cfg_state |= NG_BTSOCKET_L2CAP_CFG_OUT_SENT;