rfcomm_dlc_open
int rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst,
err = rfcomm_dlc_open(d, &rfcomm_pi(sk)->src, &sa->rc_bdaddr,
err = rfcomm_dlc_open(dev->dlc, &dev->src, &dev->dst, dev->channel);