hci_filter_set
hci_filter_set(type, &filter->packet_mask);
hci_filter_set(event, &filter->event_mask);
hci_filter_set(HCI_EVENT_COMMAND_COMPL, &filt);
hci_filter_set(HCI_EVENT_INQUIRY_RESULT, &filt);
hci_filter_set(HCI_EVENT_INQUIRY_COMPL, &filt);
hci_filter_set(HCI_EVENT_REMOTE_NAME_REQ_COMPL, &filt);
hci_filter_set(HCI_EVENT_COMMAND_COMPL, &pcb->hp_efilter);
hci_filter_set(HCI_EVENT_COMMAND_STATUS, &pcb->hp_efilter);
hci_filter_set(HCI_EVENT_PKT, &pcb->hp_pfilter);
hci_filter_set(HCI_EVENT_COMMAND_COMPL, &f);
if (event != 0) hci_filter_set(event, &f);