static void handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) {
UNUSED(packet_type);
UNUSED(channel);
UNUSED(size);
des_iterator_t attribute_list_it;
des_iterator_t additional_des_it;
des_iterator_t prot_it;
uint8_t *des_element;
uint8_t *element;
uint32_t uuid;
uint8_t status;
switch (hci_event_packet_get_type(packet)){
case SDP_EVENT_QUERY_ATTRIBUTE_VALUE:
if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) {
attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet);
if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) {
switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) {
case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST:
for (des_iterator_init(&attribute_list_it, attribute_value); des_iterator_has_more(&attribute_list_it); des_iterator_next(&attribute_list_it)) {
if (des_iterator_get_type(&attribute_list_it) != DE_DES) continue;
des_element = des_iterator_get_element(&attribute_list_it);
des_iterator_init(&prot_it, des_element);
element = des_iterator_get_element(&prot_it);
if (de_get_element_type(element) != DE_UUID) continue;
uuid = de_get_uuid32(element);
switch (uuid){
case BLUETOOTH_PROTOCOL_L2CAP:
if (!des_iterator_has_more(&prot_it)) continue;
des_iterator_next(&prot_it);
de_element_get_uint16(des_iterator_get_element(&prot_it), &hid_control_psm);
printf("HID Control PSM: 0x%04x\n", (int) hid_control_psm);
break;
default:
break;
}
}
break;
case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS:
for (des_iterator_init(&attribute_list_it, attribute_value); des_iterator_has_more(&attribute_list_it); des_iterator_next(&attribute_list_it)) {
if (des_iterator_get_type(&attribute_list_it) != DE_DES) continue;
des_element = des_iterator_get_element(&attribute_list_it);
for (des_iterator_init(&additional_des_it, des_element); des_iterator_has_more(&additional_des_it); des_iterator_next(&additional_des_it)) {
if (des_iterator_get_type(&additional_des_it) != DE_DES) continue;
des_element = des_iterator_get_element(&additional_des_it);
des_iterator_init(&prot_it, des_element);
element = des_iterator_get_element(&prot_it);
if (de_get_element_type(element) != DE_UUID) continue;
uuid = de_get_uuid32(element);
switch (uuid){
case BLUETOOTH_PROTOCOL_L2CAP:
if (!des_iterator_has_more(&prot_it)) continue;
des_iterator_next(&prot_it);
de_element_get_uint16(des_iterator_get_element(&prot_it), &hid_interrupt_psm);
printf("HID Interrupt PSM: 0x%04x\n", (int) hid_interrupt_psm);
break;
default:
break;
}
}
}
break;
case BLUETOOTH_ATTRIBUTE_HID_DESCRIPTOR_LIST:
for (des_iterator_init(&attribute_list_it, attribute_value); des_iterator_has_more(&attribute_list_it); des_iterator_next(&attribute_list_it)) {
if (des_iterator_get_type(&attribute_list_it) != DE_DES) continue;
des_element = des_iterator_get_element(&attribute_list_it);
for (des_iterator_init(&additional_des_it, des_element); des_iterator_has_more(&additional_des_it); des_iterator_next(&additional_des_it)) {
if (des_iterator_get_type(&additional_des_it) != DE_STRING) continue;
element = des_iterator_get_element(&additional_des_it);
const uint8_t * descriptor = de_get_string(element);
hid_descriptor_len = de_get_data_size(element);
memcpy(hid_descriptor, descriptor, hid_descriptor_len);
printf("HID Descriptor:\n");
printf_hexdump(hid_descriptor, hid_descriptor_len);
}
}
break;
default:
break;
}
}
} else {
fprintf(stderr, "SDP attribute value buffer size exceeded: available %d, required %d\n", attribute_value_buffer_size, sdp_event_query_attribute_byte_get_attribute_length(packet));
}
break;
case SDP_EVENT_QUERY_COMPLETE:
if (!hid_control_psm) {
printf("HID Control PSM missing\n");
break;
}
if (!hid_interrupt_psm) {
printf("HID Interrupt PSM missing\n");
break;
}
printf("Setup HID\n");
status = l2cap_create_channel(packet_handler, remote_addr, hid_control_psm, 48, &l2cap_hid_control_cid);
if (status){
printf("Connecting to HID Control failed: 0x%02x\n", status);
}
break;
}
}
void iter(des_iterator_t * des_list_it){
CHECK_EQUAL(des_iterator_get_type(des_list_it), DE_DES);
des_iterator_t prot_it;
des_iterator_t packet_it;
uint8_t * des_element;
uint8_t * packet_des;
des_element = des_iterator_get_element(des_list_it);
for (des_iterator_init(&prot_it, des_element) ; des_iterator_has_more(&prot_it) ; des_iterator_next(&prot_it) ){
if (des_iterator_get_type(&prot_it) != DE_DES){
CHECK_EQUAL_UINT16(&prot_it);
continue;
}
packet_des = des_iterator_get_element(&prot_it);
for (des_iterator_init(&packet_it, packet_des) ; des_iterator_has_more(&packet_it) ; des_iterator_next(&packet_it)){
CHECK_EQUAL_UINT16(&packet_it);
}
}
}
/* LISTING_START(HandleSDPQUeryResult): Extracting BNEP Protcol UUID and L2CAP PSM */
static void handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
/* LISTING_PAUSE */
des_iterator_t des_list_it;
des_iterator_t prot_it;
char *str;
switch (hci_event_packet_get_type(packet)){
case SDP_EVENT_QUERY_ATTRIBUTE_VALUE:
// handle new record
if (sdp_event_query_attribute_byte_get_record_id(packet) != record_id){
record_id = sdp_event_query_attribute_byte_get_record_id(packet);
printf("\n---\nRecord nr. %u\n", record_id);
}
assertBuffer(sdp_event_query_attribute_byte_get_attribute_length(packet));
attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet);
if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)){
/* LISTING_RESUME */
/* @text The Service Class ID List is a Data Element Sequence (DES) of UUIDs.
* The BNEP PAN protocol UUID is within this list.
*/
switch(sdp_event_query_attribute_byte_get_attribute_id(packet)){
// 0x0001 "Service Class ID List"
case SDP_ServiceClassIDList:
if (de_get_element_type(attribute_value) != DE_DES) break;
for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)){
uint8_t * element = des_iterator_get_element(&des_list_it);
if (de_get_element_type(element) != DE_UUID) continue;
uint32_t uuid = de_get_uuid32(element);
switch (uuid){
case PANU_UUID:
case NAP_UUID:
case GN_UUID:
printf(" ** Attribute 0x%04x: BNEP PAN protocol UUID: %04x\n", sdp_event_query_attribute_byte_get_attribute_id(packet), uuid);
break;
default:
break;
}
}
break;
/* LISTING_PAUSE */
// 0x0100 "Service Name"
case 0x0100:
// 0x0101 "Service Description"
case 0x0101:
str = get_string_from_data_element(attribute_value);
printf(" ** Attribute 0x%04x: %s\n", sdp_event_query_attribute_byte_get_attribute_id(packet), str);
free(str);
break;
/* LISTING_RESUME */
/* @text The Protocol Descriptor List is DES
* which contains one DES for each protocol. For PAN serivces, it contains
* a DES with the L2CAP Protocol UUID and a PSM,
* and another DES with the BNEP UUID and the the BNEP version.
*/
case SDP_ProtocolDescriptorList:{
printf(" ** Attribute 0x%04x: ", sdp_event_query_attribute_byte_get_attribute_id(packet));
uint16_t l2cap_psm = 0;
uint16_t bnep_version = 0;
for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)){
if (des_iterator_get_type(&des_list_it) != DE_DES) continue;
uint8_t * des_element = des_iterator_get_element(&des_list_it);
des_iterator_init(&prot_it, des_element);
uint8_t * element = des_iterator_get_element(&prot_it);
if (de_get_element_type(element) != DE_UUID) continue;
uint32_t uuid = de_get_uuid32(element);
switch (uuid){
case SDP_L2CAPProtocol:
if (!des_iterator_has_more(&prot_it)) continue;
des_iterator_next(&prot_it);
de_element_get_uint16(des_iterator_get_element(&prot_it), &l2cap_psm);
break;
case SDP_BNEPProtocol:
if (!des_iterator_has_more(&prot_it)) continue;
des_iterator_next(&prot_it);
de_element_get_uint16(des_iterator_get_element(&prot_it), &bnep_version);
break;
default:
break;
}
}
printf("l2cap_psm 0x%04x, bnep_version 0x%04x\n", l2cap_psm, bnep_version);
}
break;
/* LISTING_PAUSE */
default:
break;
}
}
break;
case SDP_EVENT_QUERY_COMPLETE:
printf("General query done with status %d.\n\n", sdp_event_query_complete_get_status(packet));
break;
}
/* LISTING_RESUME */
}