// we assume that we don't get two requests in a row
static void sdp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) {
uint16_t transaction_id;
SDP_PDU_ID_t pdu_id;
uint16_t remote_mtu;
// uint16_t param_len;
switch (packet_type) {
case L2CAP_DATA_PACKET:
pdu_id = (SDP_PDU_ID_t) packet[0];
transaction_id = READ_NET_16(packet, 1);
// param_len = READ_NET_16(packet, 3);
remote_mtu = l2cap_get_remote_mtu_for_local_cid(channel);
// account for our buffer
if (remote_mtu > SDP_RESPONSE_BUFFER_SIZE) {
remote_mtu = SDP_RESPONSE_BUFFER_SIZE;
}
// log_info("SDP Request: type %u, transaction id %u, len %u, mtu %u", pdu_id, transaction_id, param_len, remote_mtu);
switch (pdu_id) {
case SDP_ServiceSearchRequest:
sdp_response_size = sdp_handle_service_search_request(packet, remote_mtu);
break;
case SDP_ServiceAttributeRequest:
sdp_response_size = sdp_handle_service_attribute_request(packet, remote_mtu);
break;
case SDP_ServiceSearchAttributeRequest:
sdp_response_size = sdp_handle_service_search_attribute_request(packet, remote_mtu);
break;
default:
sdp_response_size = sdp_create_error_response(transaction_id, 0x0003); // invalid syntax
break;
}
sdp_try_respond();
break;
case HCI_EVENT_PACKET:
switch (packet[0]) {
case L2CAP_EVENT_INCOMING_CONNECTION:
if (l2cap_cid) {
// CONNECTION REJECTED DUE TO LIMITED RESOURCES
l2cap_decline_connection_internal(channel, 0x04);
break;
}
// accept
l2cap_cid = channel;
sdp_response_size = 0;
l2cap_accept_connection_internal(channel);
break;
case L2CAP_EVENT_CHANNEL_OPENED:
if (packet[2]) {
// open failed -> reset
l2cap_cid = 0;
}
break;
case L2CAP_EVENT_CREDITS:
case DAEMON_EVENT_HCI_PACKET_SENT:
sdp_try_respond();
break;
case L2CAP_EVENT_CHANNEL_CLOSED:
if (channel == l2cap_cid) {
// reset
l2cap_cid = 0;
}
break;
default:
// other event
break;
}
break;
default:
// other packet type
break;
}
}
void sdp_test(){
const uint16_t remote_mtu = 48;
uint8_t allAttributeIDs[20]; //
// create an attribute list
de_create_sequence(allAttributeIDs);
de_add_number(allAttributeIDs, DE_UINT, DE_SIZE_32, 0x0000ffff);
// create two records with 2 attributes each
de_create_sequence(record);
de_add_number(record, DE_UINT, DE_SIZE_16, SDP_ServiceRecordHandle);
de_add_number(record, DE_UINT, DE_SIZE_32, 0x10001);
de_add_number(record, DE_UINT, DE_SIZE_16, SDP_ServiceClassIDList);
de_add_number(record, DE_UUID, DE_SIZE_16, 0x0001);
de_add_number(record, DE_UINT, DE_SIZE_16, SDP_BrowseGroupList);
de_add_number(record, DE_UUID, DE_SIZE_16, 0x0001);
uint32_t handle_1 = sdp_register_service_internal(NULL, record);
de_dump_data_element(record);
de_create_sequence(record);
de_add_number(record, DE_UINT, DE_SIZE_16, SDP_ServiceRecordHandle);
de_add_number(record, DE_UINT, DE_SIZE_32, 0x10002);
de_add_number(record, DE_UINT, DE_SIZE_16, SDP_ServiceClassIDList);
de_add_number(record, DE_UUID, DE_SIZE_16, 0x0002);
de_add_number(record, DE_UINT, DE_SIZE_16, SDP_BrowseGroupList);
de_add_number(record, DE_UUID, DE_SIZE_16, 0x0001);
sdp_register_service_internal(NULL, record);
de_dump_data_element(record);
uint16_t size = spd_get_filtered_size(record, allAttributeIDs);
printf("Attribute size %u\n", size);
uint16_t transactionID = 1;
uint8_t * attributeIDList;
uint16_t attributeIDListLen;
uint16_t response_pos;
uint8_t * serviceSearchPattern;
uint16_t serviceSearchPatternLen;
#if 1
// sdp_handle_service_search_request
uint16_t nr_services = 1;
request[0] = SDP_ServiceSearchRequest;
net_store_16(request, 1, transactionID++); // transaction ID
serviceSearchPattern = &request[5];
de_create_sequence(serviceSearchPattern);
{
de_add_number(serviceSearchPattern, DE_UUID, DE_SIZE_16, 0x0001);
}
serviceSearchPatternLen = de_get_len(serviceSearchPattern);
net_store_16(request, 5 + serviceSearchPatternLen, 2); // max
request[5 + serviceSearchPatternLen + 2] = 0; // cont
sdp_handle_service_search_request(request, 16);
dump_service_search_response();
memcpy(request + 5 + serviceSearchPatternLen + 2, sdp_response_buffer + 9 + nr_services*4, 3);
sdp_handle_service_search_request(request, remote_mtu);
dump_service_search_response();
#endif
#if 1
// sdp_handle_service_attribute_request
request[0] = SDP_ServiceAttributeRequest;
net_store_16(request, 1, transactionID++); // transaction ID
net_store_32(request, 5, handle_1); // record handle
net_store_16(request, 9, 11); // max bytes
attributeIDList = request + 11;
de_create_sequence(attributeIDList);
de_add_number(attributeIDList, DE_UINT, DE_SIZE_32, 0x0000ffff);
attributeIDListLen = de_get_len(attributeIDList);
request[11+attributeIDListLen] = 0;
response_pos = 0;
while(1) {
sdp_handle_service_attribute_request(request, remote_mtu);
uint16_t attributeListByteCount = READ_NET_16(sdp_response_buffer, 5);
memcpy( &response[response_pos], &sdp_response_buffer[7], attributeListByteCount);
response_pos += attributeListByteCount;
printf("attributeListByteCount %u\n", attributeListByteCount);
printf("Continuation %u\n", sdp_response_buffer[7+attributeListByteCount]);
if (sdp_response_buffer[7+attributeListByteCount] == 0) break;
printf("Continuation {%u}\n", READ_NET_16(sdp_response_buffer, 7+attributeListByteCount+1));
memcpy(request+11+attributeIDListLen, sdp_response_buffer+7+attributeListByteCount, 3);
}
de_dump_data_element(response);
#endif
#if 1
// sdp_handle_service_search_attribute_request
request[0] = SDP_ServiceSearchAttributeRequest;
net_store_16(request, 1, transactionID++); // transaction ID
serviceSearchPattern = &request[5];
de_create_sequence(serviceSearchPattern);
{
de_add_number(serviceSearchPattern, DE_UUID, DE_SIZE_16, 0x0001);
}
serviceSearchPatternLen = de_get_len(serviceSearchPattern);
net_store_16(request, 5 + serviceSearchPatternLen, 11); // MaximumAttributeByteCount:
attributeIDList = request + 5 + serviceSearchPatternLen + 2;
de_create_sequence(attributeIDList);
de_add_number(attributeIDList, DE_UINT, DE_SIZE_32, 0x0000ffff);
attributeIDListLen = de_get_len(attributeIDList);
request[5 + serviceSearchPatternLen + 2 + attributeIDListLen] = 0;
response_pos = 0;
while (1) {
sdp_handle_service_search_attribute_request(request, remote_mtu);
uint16_t attributeListByteCount = READ_NET_16(sdp_response_buffer, 5);
memcpy( &response[response_pos], &sdp_response_buffer[7], attributeListByteCount);
response_pos += attributeListByteCount;
printf("attributeListByteCount %u\n", attributeListByteCount);
printf("Continuation %u\n", sdp_response_buffer[7+attributeListByteCount]);
if (sdp_response_buffer[7+attributeListByteCount] == 0) break;
printf("Continuation {%u,%u}\n", READ_NET_16(sdp_response_buffer, 7+attributeListByteCount+1),
READ_NET_16(sdp_response_buffer, 7+attributeListByteCount+3));
memcpy(request+5 + serviceSearchPatternLen + 2 + attributeIDListLen, sdp_response_buffer+7+attributeListByteCount, 5);
}
de_dump_data_element(response);
#endif
exit(0);
}