l2cap_chan_send
int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
err = l2cap_chan_send(chan, &msg, skb->len, NULL);
EXPORT_SYMBOL_GPL(l2cap_chan_send);
err = l2cap_chan_send(chan, msg, len, &sockc);
l2cap_chan_send(chan, &msg, 1 + len, NULL);