NG_HCI_CMD_PKT_SIZE
sizeof(ng_hci_cmd_pkt_t) + NG_HCI_CMD_PKT_SIZE)
m->m_pkthdr.len > sizeof(ng_hci_cmd_pkt_t) + NG_HCI_CMD_PKT_SIZE) {
assert(size <= sizeof(ng_hci_cmd_pkt_t) + NG_HCI_CMD_PKT_SIZE);
assert(0 < cp_size && cp_size <= NG_HCI_CMD_PKT_SIZE);