int a2dp_source_stream_send_media_payload(uint16_t a2dp_cid, uint8_t local_seid, uint8_t * storage, int num_bytes_to_copy, uint8_t num_frames, uint8_t marker){
avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context);
if (!stream_endpoint) {
log_error("A2DP source: no stream_endpoint with seid %d", local_seid);
return 0;
}
if (a2dp_source_context.avdtp_cid != a2dp_cid){
log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid);
return 0;
}
if (stream_endpoint->l2cap_media_cid == 0){
log_error("A2DP source: no media connection for seid %d", local_seid);
return 0;
}
int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid);
int offset = 0;
l2cap_reserve_packet_buffer();
uint8_t * media_packet = l2cap_get_outgoing_buffer();
//int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid);
a2dp_source_setup_media_header(media_packet, size, &offset, marker, stream_endpoint->sequence_number);
a2dp_source_copy_media_payload(media_packet, size, &offset, storage, num_bytes_to_copy, num_frames);
stream_endpoint->sequence_number++;
l2cap_send_prepared(stream_endpoint->l2cap_media_cid, offset);
return size;
}
static int avdtp_source_stream_send_media_payload(uint8_t local_seid, uint8_t * storage, int num_bytes_to_copy, uint8_t num_frames, uint8_t marker){
avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context);
if (!stream_endpoint) {
log_error("no stream_endpoint found for seid %d", local_seid);
return 0;
}
if (stream_endpoint->l2cap_media_cid == 0){
log_error("no media cid found for seid %d", local_seid);
return 0;
}
int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid);
int offset = 0;
// HACK / PTS requests ERTM although we did not offer it in L2CAP Information Request. Withouth ERTM support, default MTU of 48 will be used, but that's to
// small for a 44.1kHz/16/8/Stereo/bitpool 53 sbc frame of 119 bytes (+ media info)
size = 0x290;
l2cap_reserve_packet_buffer();
uint8_t * media_packet = l2cap_get_outgoing_buffer();
//int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid);
a2dp_source_setup_media_header(media_packet, size, &offset, marker, stream_endpoint->sequence_number);
a2dp_source_copy_media_payload(media_packet, size, &offset, storage, num_bytes_to_copy, num_frames);
stream_endpoint->sequence_number++;
l2cap_send_prepared(stream_endpoint->l2cap_media_cid, offset);
return size;
}
static void sdp_client_send_request(uint16_t channel){
if (sdp_client_state != W2_SEND) return;
l2cap_reserve_packet_buffer();
uint8_t * data = l2cap_get_outgoing_buffer();
uint16_t request_len = 0;
switch (PDU_ID){
#ifdef ENABLE_SDP_EXTRA_QUERIES
case SDP_ServiceSearchResponse:
request_len = sdp_client_setup_service_search_request(data);
break;
case SDP_ServiceAttributeResponse:
request_len = sdp_client_setup_service_attribute_request(data);
break;
#endif
case SDP_ServiceSearchAttributeResponse:
request_len = sdp_client_setup_service_search_attribute_request(data);
break;
default:
log_error("SDP Client sdp_client_send_request :: PDU ID invalid. %u", PDU_ID);
return;
}
// prevent re-entrance
sdp_client_state = W4_RESPONSE;
PDU_ID = SDP_Invalid;
l2cap_send_prepared(channel, request_len);
}
int att_server_notify(uint16_t handle, uint8_t *value, uint16_t value_len){
if (!l2cap_can_send_fixed_channel_packet_now(att_connection.con_handle)) return BTSTACK_ACL_BUFFERS_FULL;
l2cap_reserve_packet_buffer();
uint8_t * packet_buffer = l2cap_get_outgoing_buffer();
uint16_t size = att_prepare_handle_value_notification(&att_connection, handle, value, value_len, packet_buffer);
return l2cap_send_prepared_connectionless(att_connection.con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, size);
}
int att_server_notify(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t *value, uint16_t value_len){
att_server_t * att_server = att_server_for_handle(con_handle);
if (!att_server) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
if (!att_dispatch_server_can_send_now(con_handle)) return BTSTACK_ACL_BUFFERS_FULL;
l2cap_reserve_packet_buffer();
uint8_t * packet_buffer = l2cap_get_outgoing_buffer();
uint16_t size = att_prepare_handle_value_notification(&att_server->connection, attribute_handle, value, value_len, packet_buffer);
return l2cap_send_prepared_connectionless(att_server->connection.con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, size);
}
void send_ucd_packet(void){
l2cap_reserve_packet_buffer();
int ucd_size = 50;
uint8_t * ucd_buffer = l2cap_get_outgoing_buffer();
bt_store_16(ucd_buffer, 0, 0x2211);
int i;
for (i=2; i< ucd_size ; i++){
ucd_buffer[i] = i;
}
l2cap_send_prepared_connectionless(handle, L2CAP_CID_CONNECTIONLESS_CHANNEL, ucd_size);
}
// pre: att_server->state == ATT_SERVER_REQUEST_RECEIVED_AND_VALIDATED
// pre: can send now
// returns: 1 if packet was sent
static int att_server_process_validated_request(att_server_t * att_server){
l2cap_reserve_packet_buffer();
uint8_t * att_response_buffer = l2cap_get_outgoing_buffer();
uint16_t att_response_size = att_handle_request(&att_server->connection, att_server->request_buffer, att_server->request_size, att_response_buffer);
#ifdef ENABLE_ATT_DELAYED_READ_RESPONSE
if (att_response_size == ATT_READ_RESPONSE_PENDING){
// update state
att_server->state = ATT_SERVER_READ_RESPONSE_PENDING;
// callback with handle ATT_READ_RESPONSE_PENDING
att_server_client_read_callback(att_server->connection.con_handle, ATT_READ_RESPONSE_PENDING, 0, NULL, 0);
// free reserved buffer
l2cap_release_packet_buffer();
return 0;
}
#endif
// intercept "insufficient authorization" for authenticated connections to allow for user authorization
if ((att_response_size >= 4)
&& (att_response_buffer[0] == ATT_ERROR_RESPONSE)
&& (att_response_buffer[4] == ATT_ERROR_INSUFFICIENT_AUTHORIZATION)
&& (att_server->connection.authenticated)){
switch (gap_authorization_state(att_server->connection.con_handle)){
case AUTHORIZATION_UNKNOWN:
l2cap_release_packet_buffer();
sm_request_pairing(att_server->connection.con_handle);
return 0;
case AUTHORIZATION_PENDING:
l2cap_release_packet_buffer();
return 0;
default:
break;
}
}
att_server->state = ATT_SERVER_IDLE;
if (att_response_size == 0) {
l2cap_release_packet_buffer();
return 0;
}
l2cap_send_prepared_connectionless(att_server->connection.con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, att_response_size);
// notify client about MTU exchange result
if (att_response_buffer[0] == ATT_EXCHANGE_MTU_RESPONSE){
att_emit_mtu_event(att_server->connection.con_handle, att_server->connection.mtu);
}
return 1;
}
int att_server_indicate(uint16_t handle, uint8_t *value, uint16_t value_len){
if (att_handle_value_indication_handle) return ATT_HANDLE_VALUE_INDICATION_IN_PORGRESS;
if (!l2cap_can_send_fixed_channel_packet_now(att_connection.con_handle)) return BTSTACK_ACL_BUFFERS_FULL;
// track indication
att_handle_value_indication_handle = handle;
run_loop_set_timer_handler(&att_handle_value_indication_timer, att_handle_value_indication_timeout);
run_loop_set_timer(&att_handle_value_indication_timer, ATT_TRANSACTION_TIMEOUT_MS);
run_loop_add_timer(&att_handle_value_indication_timer);
l2cap_reserve_packet_buffer();
uint8_t * packet_buffer = l2cap_get_outgoing_buffer();
uint16_t size = att_prepare_handle_value_indication(&att_connection, handle, value, value_len, packet_buffer);
l2cap_send_prepared_connectionless(att_connection.con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, size);
return 0;
}
int att_server_indicate(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t *value, uint16_t value_len){
att_server_t * att_server = att_server_for_handle(con_handle);
if (!att_server) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
if (att_server->value_indication_handle) return ATT_HANDLE_VALUE_INDICATION_IN_PROGRESS;
if (!att_dispatch_server_can_send_now(con_handle)) return BTSTACK_ACL_BUFFERS_FULL;
// track indication
att_server->value_indication_handle = attribute_handle;
btstack_run_loop_set_timer_handler(&att_server->value_indication_timer, att_handle_value_indication_timeout);
btstack_run_loop_set_timer(&att_server->value_indication_timer, ATT_TRANSACTION_TIMEOUT_MS);
btstack_run_loop_add_timer(&att_server->value_indication_timer);
l2cap_reserve_packet_buffer();
uint8_t * packet_buffer = l2cap_get_outgoing_buffer();
uint16_t size = att_prepare_handle_value_indication(&att_server->connection, attribute_handle, value, value_len, packet_buffer);
l2cap_send_prepared_connectionless(att_server->connection.con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, size);
return 0;
}
static void send_request(uint16_t channel){
l2cap_reserve_packet_buffer();
uint8_t * data = l2cap_get_outgoing_buffer();
uint16_t request_len = 0;
switch (PDU_ID){
#ifdef HAVE_SDP_EXTRA_QUERIES
case SDP_ServiceSearchResponse:
request_len = setup_service_search_request(data);
break;
case SDP_ServiceAttributeResponse:
request_len = setup_service_attribute_request(data);
break;
#endif
case SDP_ServiceSearchAttributeResponse:
request_len = setup_service_search_attribute_request(data);
break;
default:
log_error("SDP Client send_request :: PDU ID invalid. %u", PDU_ID);
return;
}
// prevent re-entrance
sdp_client_state = W4_RESPONSE;
int err = l2cap_send_prepared(channel, request_len);
// l2cap_send_prepared shouldn't have failed as l2ap_can_send_packet_now() was true
switch (err){
case 0:
log_debug("l2cap_send_internal() -> OK");
PDU_ID = SDP_Invalid;
break;
case BTSTACK_ACL_BUFFERS_FULL:
sdp_client_state = W2_SEND;
log_info("l2cap_send_internal() ->BTSTACK_ACL_BUFFERS_FULL");
break;
default:
sdp_client_state = W2_SEND;
log_error("l2cap_send_internal() -> err %d", err);
break;
}
}
static void att_run(void){
switch (att_server_state){
case ATT_SERVER_IDLE:
case ATT_SERVER_W4_SIGNED_WRITE_VALIDATION:
return;
case ATT_SERVER_REQUEST_RECEIVED:
if (att_request_buffer[0] == ATT_SIGNED_WRITE_COMMAND){
log_info("ATT Signed Write!");
if (!sm_cmac_ready()) {
log_info("ATT Signed Write, sm_cmac engine not ready. Abort");
att_server_state = ATT_SERVER_IDLE;
return;
}
if (att_request_size < (3 + 12)) {
log_info("ATT Signed Write, request to short. Abort.");
att_server_state = ATT_SERVER_IDLE;
return;
}
if (att_ir_lookup_active){
return;
}
if (att_ir_le_device_db_index < 0){
log_info("ATT Signed Write, CSRK not available");
att_server_state = ATT_SERVER_IDLE;
return;
}
// check counter
uint32_t counter_packet = READ_BT_32(att_request_buffer, att_request_size-12);
uint32_t counter_db = le_device_db_remote_counter_get(att_ir_le_device_db_index);
log_info("ATT Signed Write, DB counter %u, packet counter %u", counter_db, counter_packet);
if (counter_packet < counter_db){
log_info("ATT Signed Write, db reports higher counter, abort");
att_server_state = ATT_SERVER_IDLE;
return;
}
// signature is { sequence counter, secure hash }
sm_key_t csrk;
le_device_db_csrk_get(att_ir_le_device_db_index, csrk);
att_server_state = ATT_SERVER_W4_SIGNED_WRITE_VALIDATION;
log_info("Orig Signature: ");
hexdump( &att_request_buffer[att_request_size-8], 8);
sm_cmac_start(csrk, att_request_size - 12, att_request_buffer, counter_packet, att_signed_write_handle_cmac_result);
return;
}
// NOTE: fall through for regular commands
case ATT_SERVER_REQUEST_RECEIVED_AND_VALIDATED:
if (!l2cap_can_send_fixed_channel_packet_now(att_connection.con_handle)) return;
l2cap_reserve_packet_buffer();
uint8_t * att_response_buffer = l2cap_get_outgoing_buffer();
uint16_t att_response_size = att_handle_request(&att_connection, att_request_buffer, att_request_size, att_response_buffer);
// intercept "insufficient authorization" for authenticated connections to allow for user authorization
if ((att_response_size >= 4)
&& (att_response_buffer[0] == ATT_ERROR_RESPONSE)
&& (att_response_buffer[4] == ATT_ERROR_INSUFFICIENT_AUTHORIZATION)
&& (att_connection.authenticated)){
switch (sm_authorization_state(att_client_addr_type, att_client_address)){
case AUTHORIZATION_UNKNOWN:
l2cap_release_packet_buffer();
sm_request_authorization(att_client_addr_type, att_client_address);
return;
case AUTHORIZATION_PENDING:
l2cap_release_packet_buffer();
return;
default:
break;
}
}
att_server_state = ATT_SERVER_IDLE;
if (att_response_size == 0) {
l2cap_release_packet_buffer();
return;
}
l2cap_send_prepared_connectionless(att_connection.con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, att_response_size);
// notify client about MTU exchange result
if (att_response_buffer[0] == ATT_EXCHANGE_MTU_RESPONSE){
att_emit_mtu_event(att_connection.con_handle, att_connection.mtu);
}
break;
}
}
void avdtp_initiator_stream_config_subsm_run(avdtp_connection_t * connection, avdtp_context_t * context){
int sent = 1;
switch (connection->initiator_connection_state){
case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS:
log_info("INT: AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS");
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER;
avdtp_initiator_send_signaling_cmd(connection->l2cap_signaling_cid, AVDTP_SI_DISCOVER, connection->initiator_transaction_label);
break;
case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES:
log_info("INT: AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES");
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER;
avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_CAPABILITIES, connection->initiator_transaction_label, connection->remote_seid);
break;
case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES:
log_info("INT: AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES");
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER;
avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_ALL_CAPABILITIES, connection->initiator_transaction_label, connection->remote_seid);
break;
case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION:
log_info("INT: AVDTP_INITIATOR_W4_GET_CONFIGURATION");
connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_ANSWER;
avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_GET_CONFIGURATION, connection->initiator_transaction_label, connection->remote_seid);
break;
default:
sent = 0;
break;
}
if (sent) return;
sent = 1;
avdtp_stream_endpoint_t * stream_endpoint = NULL;
stream_endpoint = avdtp_stream_endpoint_associated_with_acp_seid(connection->remote_seid, context);
if (!stream_endpoint){
stream_endpoint = avdtp_stream_endpoint_with_seid(connection->local_seid, context);
}
if (!stream_endpoint) return;
avdtp_initiator_stream_endpoint_state_t stream_endpoint_state = stream_endpoint->initiator_config_state;
stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W4_ANSWER;
if (stream_endpoint->start_stream){
stream_endpoint->start_stream = 0;
if (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_OPENED){
connection->local_seid = stream_endpoint->sep.seid;
connection->remote_seid = connection->remote_seps[stream_endpoint->remote_sep_index].seid;
avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_START, connection->initiator_transaction_label++, connection->remote_seid);
return;
}
return;
}
if (stream_endpoint->stop_stream){
stream_endpoint->stop_stream = 0;
if (stream_endpoint->state >= AVDTP_STREAM_ENDPOINT_OPENED){
connection->local_seid = stream_endpoint->sep.seid;
connection->remote_seid = connection->remote_seps[stream_endpoint->remote_sep_index].seid;
avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_CLOSE, connection->initiator_transaction_label++, connection->remote_seid);
return;
}
}
if (stream_endpoint->abort_stream){
stream_endpoint->abort_stream = 0;
switch (stream_endpoint->state){
case AVDTP_STREAM_ENDPOINT_CONFIGURED:
case AVDTP_STREAM_ENDPOINT_CLOSING:
case AVDTP_STREAM_ENDPOINT_OPENED:
case AVDTP_STREAM_ENDPOINT_STREAMING:
connection->local_seid = stream_endpoint->sep.seid;
connection->remote_seid = connection->remote_seps[stream_endpoint->remote_sep_index].seid;
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_ABORTING;
avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_ABORT, connection->initiator_transaction_label++, connection->remote_seid);
return;
default:
break;
}
}
if (stream_endpoint->suspend_stream){
stream_endpoint->suspend_stream = 0;
if (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_STREAMING){
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING;
avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_SUSPEND, connection->initiator_transaction_label, connection->remote_seid);
return;
}
}
if (stream_endpoint->send_stream){
stream_endpoint->send_stream = 0;
if (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_STREAMING){
stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING;
avdtp_streaming_emit_can_send_media_packet_now(context->avdtp_callback, stream_endpoint->l2cap_media_cid, stream_endpoint->sep.seid, stream_endpoint->sequence_number);
return;
}
}
switch (stream_endpoint_state){
case AVDTP_INITIATOR_W2_SET_CONFIGURATION:
case AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID:{
log_info("INT: AVDTP_INITIATOR_W2_(RE)CONFIGURATION bitmap, int seid %d, acp seid %d", connection->local_seid, connection->remote_seid);
// log_info_hexdump( connection->remote_capabilities.media_codec.media_codec_information, connection->remote_capabilities.media_codec.media_codec_information_len);
connection->signaling_packet.acp_seid = connection->remote_seid;
connection->signaling_packet.int_seid = connection->local_seid;
connection->signaling_packet.signal_identifier = AVDTP_SI_SET_CONFIGURATION;
if (stream_endpoint_state == AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID){
connection->signaling_packet.signal_identifier = AVDTP_SI_RECONFIGURE;
}
avdtp_prepare_capabilities(&connection->signaling_packet, connection->initiator_transaction_label, stream_endpoint->remote_configuration_bitmap, stream_endpoint->remote_configuration, connection->signaling_packet.signal_identifier);
l2cap_reserve_packet_buffer();
uint8_t * out_buffer = l2cap_get_outgoing_buffer();
uint16_t pos = avdtp_signaling_create_fragment(connection->l2cap_signaling_cid, &connection->signaling_packet, out_buffer);
if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){
stream_endpoint->initiator_config_state = AVDTP_INITIATOR_FRAGMENTATED_COMMAND;
log_info("INT: fragmented");
}
l2cap_send_prepared(connection->l2cap_signaling_cid, pos);
break;
}
case AVDTP_INITIATOR_FRAGMENTATED_COMMAND:{
l2cap_reserve_packet_buffer();
uint8_t * out_buffer = l2cap_get_outgoing_buffer();
uint16_t pos = avdtp_signaling_create_fragment(connection->l2cap_signaling_cid, &connection->signaling_packet, out_buffer);
if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){
stream_endpoint->initiator_config_state = AVDTP_INITIATOR_FRAGMENTATED_COMMAND;
log_info("INT: fragmented");
}
l2cap_send_prepared(connection->l2cap_signaling_cid, pos);
break;
}
case AVDTP_INITIATOR_W2_OPEN_STREAM:
switch (stream_endpoint->state){
case AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM:
log_info("INT: AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM");
avdtp_initiator_send_signaling_cmd_with_seid(connection->l2cap_signaling_cid, AVDTP_SI_OPEN, connection->initiator_transaction_label, connection->remote_seid);
break;
default:
sent = 0;
break;
}
break;
default:
sent = 0;
break;
}
// check fragmentation
if (connection->signaling_packet.packet_type != AVDTP_SINGLE_PACKET && connection->signaling_packet.packet_type != AVDTP_END_PACKET){
avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid);
}
}
