1 # Copyright 2015 The Chromium OS Authors. All rights reserved. 2 # Use of this source code is governed by a BSD-style license that can be 3 # found in the LICENSE file. 4 """ 5 Loopback NTB-16/32 Sequence 6 7 Reference: 8 [1] Universal Serial Bus Communication Class MBIM Compliance Testing: 20 9 http://www.usb.org/developers/docs/devclass_docs/MBIM-Compliance-1.0.pdf 10 """ 11 import array 12 13 import common 14 from autotest_lib.client.cros.cellular.mbim_compliance import mbim_data_transfer 15 from autotest_lib.client.cros.cellular.mbim_compliance.sequences \ 16 import sequence 17 18 class LoopbackSequence(sequence.Sequence): 19 """ 20 Data loopback sequence used for data transfer testing. 21 22 In this sequence, we send out an IPv4 ping packet to the device which is 23 in |connected| state and fetch the repsonse packet received from the device. 24 25 """ 26 # Payload to be used for our test. This is an IPv4 ICMP ping packet 27 DATA_PAYLOAD = array.array('B', [0x45, 0x00, 0x00, 0x54, 0xB4, 0x5A, 0x00, 28 0x00, 0x40, 0x01, 0x42, 0xF2, 0xC0, 0xA8, 29 0x01, 0x0B, 0xC0, 0xA8, 0x01, 0x01, 0x00, 30 0x00, 0x54, 0xC0, 0x3C, 0xD7, 0x00, 0x08, 31 0x6A, 0x6F, 0xB5, 0x54, 0x00, 0x00, 0x00, 32 0x00, 0x8B, 0xC9, 0x04, 0x00, 0x00, 0x00, 33 0x00, 0x00, 0x10, 0x11, 0x12, 0x13, 0x14, 34 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 35 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22, 36 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 37 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 38 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37]) 39 40 def run_internal(self, ntb_format): 41 """ 42 Run the MBIM Loopback Sequence. 43 44 Need to run the |connect| sequence before invoking this loopback 45 sequence. 46 47 @param ntb_format: Whether to send/receive an NTB16 or NTB32 frame. 48 Possible values: NTB_FORMAT_16, NTB_FORMAT_32 (mbim_constants) 49 @returns tuple of (nth, ndp, ndp_entries, payload) where, 50 nth - NTH header object received. 51 ndp - NDP header object received. 52 ndp_entries - Array of NDP entry header objects. 53 payload - Array of packets where each packet is a byte array. 54 55 """ 56 # Step 1 is to run |connect| sequence which is expected to be run 57 # before calling this to avoid calling sequences within another 58 # sequence. 59 60 # Step 2 61 data_transfer = mbim_data_transfer.MBIMDataTransfer(self.device_context) 62 data_transfer.send_data_packets(ntb_format, [self.DATA_PAYLOAD]) 63 64 # Step 3 65 nth, ndp, ndp_entries, payload = data_transfer.receive_data_packets( 66 ntb_format) 67 68 return (nth, ndp, ndp_entries, payload) 69
