l2cap_tx
l2cap_tx(chan, NULL, NULL, L2CAP_EV_MONITOR_TO);
l2cap_tx(chan, NULL, NULL, L2CAP_EV_RETRANS_TO);
l2cap_tx(chan, NULL, &seg_queue, L2CAP_EV_DATA_REQUEST);
l2cap_tx(chan, control, NULL, L2CAP_EV_RECV_REQSEQ_AND_FBIT);
l2cap_tx(chan, control, NULL, L2CAP_EV_RECV_FBIT);
l2cap_tx(chan, NULL, NULL, event);
static void l2cap_tx(struct l2cap_chan *chan, struct l2cap_ctrl *control,