nb_get_whole_buffer
error = usb->queue_bulk(bdev->bulk_out_ep->handle, nb_get_whole_buffer(nbuf),
struct hci_acl_header* header = nb_get_whole_buffer(nbuf);
struct hci_sco_header* header = nb_get_whole_buffer(nbuf);
struct hci_command_header* header = nb_get_whole_buffer(nbuf);
struct hci_event_header* header = nb_get_whole_buffer(nbuf);
void* nb_get_whole_buffer(net_buffer* nbuf);