# Copyright 2023 Google LLC # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # https://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import hci_packets as hci import link_layer_packets as ll import llcp_packets as llcp import random import unittest from hci_packets import ErrorCode from py.bluetooth import Address from py.controller import ControllerTest class Test(ControllerTest): SDU_Interval_C_TO_P = 10000 # 10ms SDU_Interval_P_TO_C = 10000 # 10ms ISO_Interval = 16 # 20ms Worst_Case_SCA = hci.ClockAccuracy.PPM_500 Packing = hci.Packing.SEQUENTIAL Framing = hci.Enable.ENABLED NSE = 4 Max_SDU_C_TO_P = 16 Max_SDU_P_TO_C = 16 PHY_C_TO_P = 0x1 PHY_P_TO_C = 0x1 Max_Transport_Latency_C_TO_P = 60 # 60ms Max_Transport_Latency_P_TO_C = 60 # 60ms RTN_C_TO_P = 3 RTN_P_TO_C = 3 # LL/CIS/CEN/BV-01-C [CIS Setup Procedure, Central Initiated] async def test(self): # Test parameters. cig_id = 0x12 cis_id = 0x42 cis_connection_handle = 0xe00 peer_address = Address('aa:bb:cc:dd:ee:ff') controller = self.controller # Enable Connected Isochronous Stream Host Support. await self.enable_connected_isochronous_stream_host_support() # Prelude: Establish an ACL connection as central with the IUT. acl_connection_handle = await self.establish_le_connection_central(peer_address) # 1. The Upper Tester sends an HCI_LE_Set_CIG_Parameters command to the IUT with # Max_SDU_C_To_P and Max_SDU_P_To_C both set to 16, other parameters set to default, but # with PHY and latency specified in Table 4.142 and framing enabled. The Upper Tester receives a # success response from the IUT with CIS_Count = 1. controller.send_cmd( hci.LeSetCigParameters(cig_id=cig_id, sdu_interval_c_to_p=self.SDU_Interval_C_TO_P, sdu_interval_p_to_c=self.SDU_Interval_P_TO_C, worst_case_sca=self.Worst_Case_SCA, max_transport_latency_c_to_p=self.Max_Transport_Latency_C_TO_P, max_transport_latency_p_to_c=self.Max_Transport_Latency_P_TO_C, packing=self.Packing, framing=self.Framing, cis_config=[ hci.CisParametersConfig(cis_id=cis_id, max_sdu_c_to_p=self.Max_SDU_C_TO_P, max_sdu_p_to_c=self.Max_SDU_P_TO_C, phy_c_to_p=self.PHY_C_TO_P, phy_p_to_c=self.PHY_P_TO_C, rtn_c_to_p=self.RTN_C_TO_P, rtn_p_to_c=self.RTN_P_TO_C) ])) await self.expect_evt( hci.LeSetCigParametersComplete(status=ErrorCode.SUCCESS, num_hci_command_packets=1, cig_id=cig_id, connection_handle=[cis_connection_handle])) # 2. The Upper Tester sends an HCI_LE_Create_CIS command to create a single CIS and receives a # success response from the IUT. controller.send_cmd( hci.LeCreateCis(cis_config=[ hci.LeCreateCisConfig(cis_connection_handle=cis_connection_handle, acl_connection_handle=acl_connection_handle) ])) await self.expect_evt(hci.LeCreateCisStatus(status=ErrorCode.SUCCESS, num_hci_command_packets=1)) # 3. The Lower Tester receives an LL_CIS_REQ PDU from the IUT with all fields set to valid values. # CIS_Offset_Min is a value between 500µs and TSPX_conn_interval, CIS_Offset_Max is a value # between CIS_Offset_Min and the CIS_Offset_Max value as calculated in [14] Section 2.4.2.29 # using TSPX_conn_interval as the value of connInterval, and connEventCount is the reference # event anchor point for which the offsets applied. cis_req = await self.expect_llcp(source_address=controller.address, destination_address=peer_address, expected_pdu=llcp.CisReq(cig_id=cig_id, cis_id=cis_id, phy_c_to_p=hci.PhyType.LE_1M, phy_p_to_c=hci.PhyType.LE_1M, framed=self.Framing == hci.Enable.ENABLED, max_sdu_c_to_p=self.Max_SDU_C_TO_P, max_sdu_p_to_c=self.Max_SDU_P_TO_C, sdu_interval_c_to_p=self.Any, sdu_interval_p_to_c=self.Any, max_pdu_c_to_p=self.Any, max_pdu_p_to_c=self.Any, nse=self.Any, sub_interval=self.Any, bn_p_to_c=self.Any, bn_c_to_p=self.Any, ft_c_to_p=self.Any, ft_p_to_c=self.Any, iso_interval=self.Any, cis_offset_min=self.Any, cis_offset_max=self.Any, conn_event_count=0)) # 4. The Lower Tester sends an LL_CIS_RSP PDU to the IUT. controller.send_llcp(source_address=peer_address, destination_address=controller.address, pdu=llcp.CisRsp(cis_offset_min=cis_req.cis_offset_min, cis_offset_max=cis_req.cis_offset_max, conn_event_count=0)) # 5. The Lower Tester receives an LL_CIS_IND from the IUT where the CIS_Offset is the time (ms) # from the start of the ACL connection event in connEvent Count to the first CIS anchor point, the # CIS_Sync_Delay is CIG_Sync_Delay minus the offset from the CIG reference point to the CIS # anchor point in s, and the connEventCount is the CIS_Offset reference point. cis_ind = await self.expect_llcp(source_address=controller.address, destination_address=peer_address, expected_pdu=llcp.CisInd(aa=0, cis_offset=self.Any, cig_sync_delay=self.Any, cis_sync_delay=self.Any, conn_event_count=0)) # 6. The Upper Tester receives an HCI_LE_CIS_Established event indicating success, after the first # CIS packet sent by the Lower Tester. The Connection_Handle parameter is set to the value # provided in the HCI_LE_Create_CIS command. await self.expect_evt( hci.LeCisEstablishedV1(status=ErrorCode.SUCCESS, connection_handle=cis_connection_handle, cig_sync_delay=cis_ind.cig_sync_delay, cis_sync_delay=cis_ind.cis_sync_delay, transport_latency_c_to_p=self.Any, transport_latency_p_to_c=self.Any, phy_c_to_p=hci.SecondaryPhyType.LE_1M, phy_p_to_c=hci.SecondaryPhyType.LE_1M, nse=cis_req.nse, bn_c_to_p=cis_req.bn_c_to_p, bn_p_to_c=cis_req.bn_p_to_c, ft_c_to_p=cis_req.ft_c_to_p, ft_p_to_c=cis_req.ft_p_to_c, max_pdu_c_to_p=cis_req.max_pdu_c_to_p, max_pdu_p_to_c=cis_req.max_pdu_p_to_c, iso_interval=cis_req.iso_interval)) # 7. The Upper Tester sends an HCI_LE_Setup_ISO_Data_Path command and receives a success # response from the IUT. controller.send_cmd( hci.LeSetupIsoDataPath( connection_handle=cis_connection_handle, data_path_direction=hci.DataPathDirection.OUTPUT, data_path_id=0, codec_id=0, controller_delay=0, codec_configuration=[], )) await self.expect_evt( hci.LeSetupIsoDataPathComplete(status=ErrorCode.SUCCESS, num_hci_command_packets=1, connection_handle=cis_connection_handle)) # 8. The Upper Tester sends HCI ISO data packets over the CIS and the Lower Tester receives # framed ISO data. iso_sdu = [random.randint(1, 251) for n in range(self.Max_SDU_C_TO_P)] controller.send_iso( hci.IsoWithoutTimestamp( connection_handle=cis_connection_handle, pb_flag=hci.IsoPacketBoundaryFlag.COMPLETE_SDU, packet_sequence_number=42, payload=iso_sdu, )) await self.expect_ll( ll.LeConnectedIsochronousPdu(source_address=controller.address, destination_address=peer_address, cig_id=cig_id, cis_id=cis_id, sequence_number=42, data=iso_sdu)) # 9. The Upper Tester sends an HCI_Disconnect command to the IUT with Reason set to any valid # value and Connection_Handle set to the connection handle of the active CIS and receives a # successful HCI_Command_Status event in response. controller.send_cmd( hci.Disconnect(connection_handle=cis_connection_handle, reason=ErrorCode.REMOTE_USER_TERMINATED_CONNECTION)) await self.expect_evt(hci.DisconnectStatus(status=ErrorCode.SUCCESS, num_hci_command_packets=1)) # 10. The IUT sends an LL_CIS_TERMINATE_IND PDU to the Lower Tester, and the ErrorCode field # in the CrtData matches the Reason code value that the Upper Tester sent in step 9. await self.expect_llcp( source_address=controller.address, destination_address=peer_address, expected_pdu=llcp.CisTerminateInd(cig_id=cig_id, cis_id=cis_id, error_code=ErrorCode.REMOTE_USER_TERMINATED_CONNECTION)) # 11. The Lower Tester sends an LL Ack to the IUT. # 12. The IUT sends an HCI_Disconnection_Complete event to the Upper Tester. await self.expect_evt( hci.DisconnectionComplete(status=ErrorCode.SUCCESS, connection_handle=cis_connection_handle, reason=ErrorCode.CONNECTION_TERMINATED_BY_LOCAL_HOST)) # 13. The Upper Tester sends an HCI_LE_Remove_CIG command to the IUT with CIG_ID set to the # value of the current inactive CIG. controller.send_cmd(hci.LeRemoveCig(cig_id=cig_id)) # 14. The IUT sends an HCI_Command_Complete event to the Upper Tester with Status set to 0x00 # and CIG_ID set to the CIG_ID value in step 13. await self.expect_evt( hci.LeRemoveCigComplete(status=ErrorCode.SUCCESS, num_hci_command_packets=1, cig_id=cig_id)) # 15. The Upper Tester sends an HCI_LE_Set_CIG_Parameters command to the IUT with default # parameters but with Max_SDU_C_To_P set to 0 and receives a success response from the IUT # with CIS_Count = 1. controller.send_cmd( hci.LeSetCigParameters(cig_id=cig_id, sdu_interval_c_to_p=self.SDU_Interval_C_TO_P, sdu_interval_p_to_c=self.SDU_Interval_P_TO_C, worst_case_sca=self.Worst_Case_SCA, max_transport_latency_c_to_p=self.Max_Transport_Latency_C_TO_P, max_transport_latency_p_to_c=self.Max_Transport_Latency_P_TO_C, packing=self.Packing, framing=self.Framing, cis_config=[ hci.CisParametersConfig(cis_id=cis_id, max_sdu_c_to_p=0, max_sdu_p_to_c=self.Max_SDU_P_TO_C, phy_c_to_p=self.PHY_C_TO_P, phy_p_to_c=self.PHY_P_TO_C, rtn_c_to_p=self.RTN_C_TO_P, rtn_p_to_c=self.RTN_P_TO_C) ])) await self.expect_evt( hci.LeSetCigParametersComplete(status=ErrorCode.SUCCESS, num_hci_command_packets=1, cig_id=cig_id, connection_handle=[cis_connection_handle])) # 16. The Upper Tester sends an HCI_LE_Create_CIS command to create a single CIS and receives a # success response from the IUT. controller.send_cmd( hci.LeCreateCis(cis_config=[ hci.LeCreateCisConfig(cis_connection_handle=cis_connection_handle, acl_connection_handle=acl_connection_handle) ])) await self.expect_evt(hci.LeCreateCisStatus(status=ErrorCode.SUCCESS, num_hci_command_packets=1)) # 17. The IUT sends an LL_CIS_REQ PDU to the Lower Tester with all fields set to valid values. # 18. The value of Max_SDU_C_To_P and BN_C_To_P in the CrtData of the LL_CIS_REQ PDU are # verified to be equal to 0. The test fails if the values are not equal to 0. cis_req = await self.expect_llcp(source_address=controller.address, destination_address=peer_address, expected_pdu=llcp.CisReq(cig_id=cig_id, cis_id=cis_id, phy_c_to_p=hci.PhyType.LE_1M, phy_p_to_c=hci.PhyType.LE_1M, framed=self.Framing == hci.Enable.ENABLED, max_sdu_c_to_p=0, max_sdu_p_to_c=self.Max_SDU_P_TO_C, sdu_interval_c_to_p=self.Any, sdu_interval_p_to_c=self.Any, max_pdu_c_to_p=self.Any, max_pdu_p_to_c=self.Any, nse=self.Any, sub_interval=self.Any, bn_c_to_p=0, bn_p_to_c=self.Any, ft_c_to_p=self.Any, ft_p_to_c=self.Any, iso_interval=self.Any, cis_offset_min=self.Any, cis_offset_max=self.Any, conn_event_count=0)) # 19. The Lower Tester sends an LL_CIS_RSP PDU to the IUT. controller.send_llcp(source_address=peer_address, destination_address=controller.address, pdu=llcp.CisRsp(cis_offset_min=cis_req.cis_offset_min, cis_offset_max=cis_req.cis_offset_max, conn_event_count=0)) # 20. The IUT sends an LL_CIS_IND to the Lower Tester. cis_ind = await self.expect_llcp(source_address=controller.address, destination_address=peer_address, expected_pdu=llcp.CisInd(aa=0, cis_offset=self.Any, cig_sync_delay=self.Any, cis_sync_delay=self.Any, conn_event_count=0)) # 21. The IUT sends an empty ISO Data Packet to the Lower Tester. # 22. The Lower Tester sends an LL Ack to the IUT. # 23. The IUT sends an HCI_LE_CIS_Established event to the Upper Tester. The Connection_Handle # parameter is set to the value provided in step 16. await self.expect_evt( hci.LeCisEstablishedV1(status=ErrorCode.SUCCESS, connection_handle=cis_connection_handle, cig_sync_delay=cis_ind.cig_sync_delay, cis_sync_delay=cis_ind.cis_sync_delay, transport_latency_c_to_p=self.Any, transport_latency_p_to_c=self.Any, phy_c_to_p=hci.SecondaryPhyType.LE_1M, phy_p_to_c=hci.SecondaryPhyType.LE_1M, nse=cis_req.nse, bn_c_to_p=cis_req.bn_c_to_p, bn_p_to_c=cis_req.bn_p_to_c, ft_c_to_p=cis_req.ft_c_to_p, ft_p_to_c=cis_req.ft_p_to_c, max_pdu_c_to_p=cis_req.max_pdu_c_to_p, max_pdu_p_to_c=cis_req.max_pdu_p_to_c, iso_interval=cis_req.iso_interval)) # 24. The Upper Tester sends an HCI_LE_Setup_ISO_Data_Path command to the IUT with # Connection_Handle set to the value provided in step 16 and Data_Path_Direction set to Output. controller.send_cmd( hci.LeSetupIsoDataPath( connection_handle=cis_connection_handle, data_path_direction=hci.DataPathDirection.OUTPUT, data_path_id=0, codec_id=0, controller_delay=0, codec_configuration=[], )) # 25. The IUT sends a successful HCI_Command_Complete event to the Upper Tester. await self.expect_evt( hci.LeSetupIsoDataPathComplete(status=ErrorCode.SUCCESS, num_hci_command_packets=1, connection_handle=cis_connection_handle)) # 26. The IUT sends a CIS Null PDU to the Lower Tester. # 27. The Lower Tester sends an ISO Data Packet to the IUT. # 28. Repeat steps 26 and 27, 50 times. iso_sdu = [random.randint(1, 251) for n in range(self.Max_SDU_P_TO_C)] controller.send_ll( ll.LeConnectedIsochronousPdu(source_address=peer_address, destination_address=controller.address, cig_id=cig_id, cis_id=cis_id, sequence_number=42, data=iso_sdu)) await self.expect_iso( hci.IsoWithoutTimestamp( connection_handle=cis_connection_handle, pb_flag=hci.IsoPacketBoundaryFlag.COMPLETE_SDU, iso_sdu_length=len(iso_sdu), packet_sequence_number=42, payload=iso_sdu, ))