/* LISTING_START(SDPQueryUUID): Querying the a list of service records on a remote device. */
static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
if (packet_type != HCI_EVENT_PACKET) return;
uint8_t event = hci_event_packet_get_type(packet);
switch (event) {
case BTSTACK_EVENT_STATE:
// BTstack activated, get started
if (btstack_event_state_get_state(packet) == HCI_STATE_WORKING){
printf("Start SDP BNEP query.\n");
sdp_client_query_uuid16(&handle_sdp_client_query_result, remote, SDP_BNEPProtocol);
}
break;
default:
break;
}
}
/* LISTING_START(packetHandler): Packet Handler */
static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size)
{
/* LISTING_PAUSE */
uint8_t event;
bd_addr_t event_addr;
uint8_t status;
uint16_t l2cap_cid;
/* LISTING_RESUME */
switch (packet_type) {
case HCI_EVENT_PACKET:
event = hci_event_packet_get_type(packet);
switch (event) {
/* @text When BTSTACK_EVENT_STATE with state HCI_STATE_WORKING
* is received and the example is started in client mode, the remote SDP HID query is started.
*/
case BTSTACK_EVENT_STATE:
if (btstack_event_state_get_state(packet) == HCI_STATE_WORKING){
printf("Start SDP HID query for remote HID Device.\n");
sdp_client_query_uuid16(&handle_sdp_client_query_result, remote_addr, BLUETOOTH_SERVICE_CLASS_HUMAN_INTERFACE_DEVICE_SERVICE);
}
break;
/* LISTING_PAUSE */
case HCI_EVENT_PIN_CODE_REQUEST:
// inform about pin code request
printf("Pin code request - using '0000'\n");
hci_event_pin_code_request_get_bd_addr(packet, event_addr);
gap_pin_code_response(event_addr, "0000");
break;
case HCI_EVENT_USER_CONFIRMATION_REQUEST:
// inform about user confirmation request
printf("SSP User Confirmation Request with numeric value '%"PRIu32"'\n", little_endian_read_32(packet, 8));
printf("SSP User Confirmation Auto accept\n");
break;
/* LISTING_RESUME */
case L2CAP_EVENT_CHANNEL_OPENED:
status = packet[2];
if (status){
printf("L2CAP Connection failed: 0x%02x\n", status);
break;
}
l2cap_cid = little_endian_read_16(packet, 13);
if (!l2cap_cid) break;
if (l2cap_cid == l2cap_hid_control_cid){
status = l2cap_create_channel(packet_handler, remote_addr, hid_interrupt_psm, 48, &l2cap_hid_interrupt_cid);
if (status){
printf("Connecting to HID Control failed: 0x%02x\n", status);
break;
}
}
if (l2cap_cid == l2cap_hid_interrupt_cid){
printf("HID Connection established\n");
}
break;
default:
break;
}
break;
case L2CAP_DATA_PACKET:
// for now, just dump incoming data
if (channel == l2cap_hid_interrupt_cid){
hid_host_handle_interrupt_report(packet, size);
} else if (channel == l2cap_hid_control_cid){
printf("HID Control: ");
printf_hexdump(packet, size);
} else {
break;
}
default:
break;
}
}