# 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.DISABLED NSE = 4 Max_SDU_C_TO_P = 130 Max_SDU_P_TO_C = 130 Max_PDU_C_TO_P = 130 Max_PDU_P_TO_C = 130 PHY_C_TO_P = 0x1 PHY_P_TO_C = 0x1 FT_C_TO_P = 1 FT_P_TO_C = 1 BN_C_TO_P = 2 BN_P_TO_C = 2 Max_Transport_Latency_C_TO_P = 40000 # 40ms Max_Transport_Latency_P_TO_C = 40000 # 40ms 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_Test command to the IUT with # CIS_Count set to 1, BN, FT, NSE, PHY_C_TO_P[], PHY_P_TO_C[] and ISO_Interval to be set to # the values specified in Table 4.135 and Table 4.136. Any remaining values are assigned the # default values as specified in Section 4.10.1.3 Default Values for Set CIG Parameters # Commands. The Upper Tester receives a successful HCI_Command_Complete event with a # valid Connection_Handle from the IUT and CIS_Count = 1. controller.send_cmd( hci.LeSetCigParametersTest(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, ft_c_to_p=self.FT_C_TO_P, ft_p_to_c=self.FT_P_TO_C, iso_interval=self.ISO_Interval, worst_case_sca=self.Worst_Case_SCA, packing=self.Packing, framing=self.Framing, cis_config=[ hci.LeCisParametersTestConfig(cis_id=cis_id, nse=self.NSE, max_sdu_c_to_p=self.Max_SDU_C_TO_P, max_sdu_p_to_c=self.Max_SDU_P_TO_C, max_pdu_c_to_p=self.Max_PDU_C_TO_P, max_pdu_p_to_c=self.Max_PDU_P_TO_C, phy_c_to_p=self.PHY_C_TO_P, phy_p_to_c=self.PHY_P_TO_C, bn_c_to_p=self.BN_C_TO_P, bn_p_to_c=self.BN_P_TO_C) ])) await self.expect_evt( hci.LeSetCigParametersTestComplete(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 the IUT with the # ACL_Connection_Handle of the established ACL connection and CIS_Count set to 1. The Upper # Tester receives a Status of Success 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.SDU_Interval_C_TO_P, sdu_interval_p_to_c=self.SDU_Interval_P_TO_C, max_pdu_c_to_p=self.Max_PDU_C_TO_P, max_pdu_p_to_c=self.Max_PDU_P_TO_C, nse=self.NSE, sub_interval=self.Any, bn_p_to_c=self.BN_C_TO_P, bn_c_to_p=self.BN_P_TO_C, ft_c_to_p=self.FT_C_TO_P, ft_p_to_c=self.FT_P_TO_C, iso_interval=self.ISO_Interval, 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 IUT sends a CIS Null PDU to the Lower Tester and the Lower Tester responds with a CIS # Null PDU. Alternately, the IUT sends an empty Data PDU, which the Lower Tester acknowledges. # These exchanges will continue until data is exchanged between the IUT and the Lower Tester in # later steps. # 7. The Upper Tester receives a successful HCI_LE_CIS_Established event with the NSE, BN, FT, # and Max_PDU parameters as set in step 1 from the IUT, after the first CIS packet sent by the LT. # 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=self.NSE, bn_c_to_p=self.BN_C_TO_P, bn_p_to_c=self.BN_P_TO_C, ft_c_to_p=self.FT_C_TO_P, ft_p_to_c=self.FT_P_TO_C, max_pdu_c_to_p=self.Max_PDU_C_TO_P, max_pdu_p_to_c=self.Max_PDU_P_TO_C, iso_interval=self.ISO_Interval)) # 8. The Upper Tester orders the IUT to send data packets to the Lower Tester. 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, )) # 9. The Lower Tester receives CIS data PDUs from the IUT in each sub-event of the CIS and # acknowledges those PDUs. 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)) # 10. Repeat step 9 for 50 ÷ BN isochronous events starting with the first event where a CIS data PDU # with nonzero payload is received.