vendor_libs/test_vendor_lib/test/packet_stream_unittest.cc

   1 //
   2 // Copyright 2015 The Android Open Source Project
   3 //
   4 // Licensed under the Apache License, Version 2.0 (the "License");
   5 // you may not use this file except in compliance with the License.
   6 // You may obtain a copy of the License at
   7 //
   8 // http://www.apache.org/licenses/LICENSE-2.0
   9 //
  10 // Unless required by applicable law or agreed to in writing, software
  11 // distributed under the License is distributed on an "AS IS" BASIS,
  12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 // See the License for the specific language governing permissions and
  14 // limitations under the License.
  15 //
  16
  17 #include "vendor_libs/test_vendor_lib/include/packet_stream.h"
  18 #include "vendor_libs/test_vendor_lib/include/command_packet.h"
  19 #include "vendor_libs/test_vendor_lib/include/event_packet.h"
  20 #include "vendor_libs/test_vendor_lib/include/packet.h"
  21
  22 #include <gtest/gtest.h>
  23 #include <cstdint>
  24 #include <memory>
  25 #include <vector>
  26
  27 extern "C" {
  28 #include "hci/include/hci_hal.h"
  29 #include "stack/include/hcidefs.h"
  30
  31 #include <sys/socket.h>
  32 }  // extern "C"
  33
  34 namespace {
  35 const char small_payload[] = "foo bar baz";
  36 const char large_payload[] =
  37   "Aristotle's principles will then be no more principles to him, than those "
  38   "of Epicurus and the Stoics: let this diversity of opinions be propounded "
  39   "to, and laid before him; he will himself choose, if he be able; if not, "
  40   "he will remain in doubt.";
  41 }  // namespace
  42
  43 namespace test_vendor_lib {
  44
  45 class PacketStreamTest : public ::testing::Test {
  46  public:
  47   PacketStreamTest() {
  48     socketpair(AF_LOCAL, SOCK_STREAM, 0, socketpair_fds_);
  49     CheckSocketpairInit();
  50   }
  51
  52   ~PacketStreamTest() {
  53     close(socketpair_fds_[0]);
  54     close(socketpair_fds_[1]);
  55   }
  56
  57   void CheckedReceiveCommand(const char* payload, uint16_t opcode) {
  58     uint8_t payload_size = strlen(payload);
  59     std::vector<uint8_t> packet;
  60
  61     packet.push_back(DATA_TYPE_COMMAND);
  62     packet.push_back(opcode);
  63     packet.push_back(opcode >> 8);
  64     packet.push_back(payload_size);
  65
  66     // Set the packet's payload.
  67     for (int i = 0; i < payload_size; ++i)
  68       packet.push_back(payload[i]);
  69
  70     // Send the packet to |packet_stream_|.
  71     write(socketpair_fds_[1], &packet[1], packet.size());
  72
  73     // Read the command packet.
  74     std::unique_ptr<CommandPacket> command =
  75         packet_stream_.ReceiveCommand(socketpair_fds_[0]);
  76
  77     const std::vector<uint8_t> received_payload = command->GetPayload();
  78
  79     // Validate the packet by checking that it's the appropriate size and then
  80     // checking each byte.
  81     EXPECT_EQ(packet.size(), command->GetPacketSize());
  82     EXPECT_EQ(DATA_TYPE_COMMAND, command->GetType());
  83     EXPECT_EQ(opcode, command->GetOpcode());
  84     EXPECT_EQ(payload_size, command->GetPayloadSize());
  85     for (int i = 0; i < payload_size; ++i)
  86       EXPECT_EQ(packet[4 + i], received_payload[i]);
  87   }
  88
  89   void CheckedSendEvent(std::unique_ptr<EventPacket> event) {
  90     EXPECT_TRUE(packet_stream_.SendEvent(*(event.get()), socketpair_fds_[0]));
  91
  92     // Read the packet sent by |packet_stream_|.
  93     uint8_t event_header[3];
  94     read(socketpair_fds_[1], event_header, 3);
  95
  96     uint8_t return_parameters_size = event_header[2];
  97     uint8_t return_parameters[return_parameters_size];
  98     read(socketpair_fds_[1], return_parameters, sizeof(return_parameters));
  99
 100     const std::vector<uint8_t> expected_payload = event->GetPayload();
 101
 102     // Validate the packet by checking that it's the
 103     // appropriate size and then checking each byte.
 104     EXPECT_EQ(event->GetPacketSize(),
 105               sizeof(event_header) + sizeof(return_parameters));
 106     EXPECT_EQ(DATA_TYPE_EVENT, event_header[0]);
 107     EXPECT_EQ(event->GetEventCode(), event_header[1]);
 108     EXPECT_EQ(event->GetPayloadSize(), return_parameters_size);
 109     for (int i = 0; i < return_parameters_size; ++i)
 110       EXPECT_EQ(expected_payload[i], return_parameters[i]);
 111   }
 112
 113  protected:
 114   PacketStream packet_stream_;
 115
 116   int socketpair_fds_[2];
 117
 118  private:
 119   // Workaround because ASSERT cannot be used directly in a constructor
 120   void CheckSocketpairInit() {
 121     ASSERT_TRUE(socketpair_fds_[0] > 0);
 122     ASSERT_TRUE(socketpair_fds_[1] > 0);
 123   }
 124
 125 };
 126
 127 TEST_F(PacketStreamTest, ReceivePacketType) {
 128   serial_data_type_t command_type = DATA_TYPE_COMMAND;
 129   write(socketpair_fds_[1], &command_type, 1);
 130   EXPECT_EQ(command_type, packet_stream_.ReceivePacketType(socketpair_fds_[0]));
 131 }
 132
 133 TEST_F(PacketStreamTest, ReceiveEmptyCommand) {
 134   CheckedReceiveCommand("", HCI_RESET);
 135 }
 136
 137 TEST_F(PacketStreamTest, ReceiveSmallCommand) {
 138   CheckedReceiveCommand(small_payload, HCI_RESET);
 139 }
 140
 141 TEST_F(PacketStreamTest, ReceiveLargeCommand) {
 142   CheckedReceiveCommand(large_payload, HCI_RESET);
 143 }
 144
 145 TEST_F(PacketStreamTest, SendEvent) {
 146   const std::vector<uint8_t> return_parameters = {0};
 147   CheckedSendEvent(
 148       EventPacket::CreateCommandCompleteEvent(1, HCI_RESET, return_parameters));
 149 }
 150
 151 }  // namespace test_vendor_lib