BTPROTO_SCO
sockopt_init(&sopt, BTPROTO_SCO, SO_SCO_MTU, 0);
.pr_protocol = BTPROTO_SCO,
CTL_NET, PF_BLUETOOTH, BTPROTO_SCO, CTL_EOL);
CTL_NET, PF_BLUETOOTH, BTPROTO_SCO,
CTL_NET, PF_BLUETOOTH, BTPROTO_SCO,
if (sopt->sopt_level != BTPROTO_SCO)