L2CAP_OPT_QOS_SIZE
if (opt.length != L2CAP_OPT_QOS_SIZE)
m_copydata(m, 0, L2CAP_OPT_QOS_SIZE, &val.qos);
if (len + sizeof(opt) + L2CAP_OPT_QOS_SIZE > sizeof(buf))
len += L2CAP_OPT_QOS_SIZE;
if (opt.length != L2CAP_OPT_QOS_SIZE)
m_copydata(m, 0, L2CAP_OPT_QOS_SIZE, &val.qos);