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//
// Copyright 2017 The Android Open Source Project
//
// 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
//
// http://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.
//
#define LOG_TAG "bt_h4_unittest"
#include "h4_protocol.h"
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <condition_variable>
#include <cstdint>
#include <cstring>
#include <mutex>
#include <vector>
#include <log/log.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
namespace android {
namespace hardware {
namespace bluetooth {
namespace V1_0 {
namespace implementation {
using ::testing::Eq;
using hci::H4Protocol;
static char sample_data1[100] = "A point is that which has no part.";
static char sample_data2[100] = "A line is breadthless length.";
static char sample_data3[100] = "The ends of a line are points.";
static char acl_data[100] =
"A straight line is a line which lies evenly with the points on itself.";
static char sco_data[100] =
"A surface is that which has length and breadth only.";
static char event_data[100] = "The edges of a surface are lines.";
MATCHER_P3(HidlVecMatches, preamble, preamble_length, payload, "") {
size_t length = strlen(payload) + preamble_length;
if (length != arg.size()) {
return false;
}
if (memcmp(preamble, arg.data(), preamble_length) != 0) {
return false;
}
return memcmp(payload, arg.data() + preamble_length,
length - preamble_length) == 0;
};
ACTION_P2(Notify, mutex, condition) {
ALOGD("%s", __func__);
std::unique_lock<std::mutex> lock(*mutex);
condition->notify_one();
}
class H4ProtocolTest : public ::testing::Test {
protected:
void SetUp() override {
ALOGD("%s", __func__);
int sockfd[2];
socketpair(AF_LOCAL, SOCK_STREAM, 0, sockfd);
H4Protocol* h4_hci =
new H4Protocol(sockfd[0], event_cb_.AsStdFunction(),
acl_cb_.AsStdFunction(), sco_cb_.AsStdFunction());
fd_watcher_.WatchFdForNonBlockingReads(
sockfd[0], [h4_hci](int fd) { h4_hci->OnDataReady(fd); });
protocol_ = h4_hci;
fake_uart_ = sockfd[1];
}
void TearDown() override { fd_watcher_.StopWatchingFileDescriptors(); }
void SendAndReadUartOutbound(uint8_t type, char* data) {
ALOGD("%s sending", __func__);
int data_length = strlen(data);
protocol_->Send(type, (uint8_t*)data, data_length);
int uart_length = data_length + 1; // + 1 for data type code
int i;
ALOGD("%s reading", __func__);
for (i = 0; i < uart_length; i++) {
fd_set read_fds;
FD_ZERO(&read_fds);
FD_SET(fake_uart_, &read_fds);
TEMP_FAILURE_RETRY(select(fake_uart_ + 1, &read_fds, NULL, NULL, NULL));
char byte;
TEMP_FAILURE_RETRY(read(fake_uart_, &byte, 1));
EXPECT_EQ(i == 0 ? type : data[i - 1], byte);
}
EXPECT_EQ(i, uart_length);
}
void WriteAndExpectInboundAclData(char* payload) {
// h4 type[1] + handle[2] + size[2]
char preamble[5] = {HCI_PACKET_TYPE_ACL_DATA, 19, 92, 0, 0};
int length = strlen(payload);
preamble[3] = length & 0xFF;
preamble[4] = (length >> 8) & 0xFF;
ALOGD("%s writing", __func__);
TEMP_FAILURE_RETRY(write(fake_uart_, preamble, sizeof(preamble)));
TEMP_FAILURE_RETRY(write(fake_uart_, payload, strlen(payload)));
ALOGD("%s waiting", __func__);
std::mutex mutex;
std::condition_variable done;
EXPECT_CALL(acl_cb_, Call(HidlVecMatches(preamble + 1, sizeof(preamble) - 1,
payload)))
.WillOnce(Notify(&mutex, &done));
// Fail if it takes longer than 100 ms.
auto timeout_time =
std::chrono::steady_clock::now() + std::chrono::milliseconds(100);
{
std::unique_lock<std::mutex> lock(mutex);
done.wait_until(lock, timeout_time);
}
}
void WriteAndExpectInboundScoData(char* payload) {
// h4 type[1] + handle[2] + size[1]
char preamble[4] = {HCI_PACKET_TYPE_SCO_DATA, 20, 17, 0};
preamble[3] = strlen(payload) & 0xFF;
ALOGD("%s writing", __func__);
TEMP_FAILURE_RETRY(write(fake_uart_, preamble, sizeof(preamble)));
TEMP_FAILURE_RETRY(write(fake_uart_, payload, strlen(payload)));
ALOGD("%s waiting", __func__);
std::mutex mutex;
std::condition_variable done;
EXPECT_CALL(sco_cb_, Call(HidlVecMatches(preamble + 1, sizeof(preamble) - 1,
payload)))
.WillOnce(Notify(&mutex, &done));
// Fail if it takes longer than 100 ms.
auto timeout_time =
std::chrono::steady_clock::now() + std::chrono::milliseconds(100);
{
std::unique_lock<std::mutex> lock(mutex);
done.wait_until(lock, timeout_time);
}
}
void WriteAndExpectInboundEvent(char* payload) {
// h4 type[1] + event_code[1] + size[1]
char preamble[3] = {HCI_PACKET_TYPE_EVENT, 9, 0};
preamble[2] = strlen(payload) & 0xFF;
ALOGD("%s writing", __func__);
TEMP_FAILURE_RETRY(write(fake_uart_, preamble, sizeof(preamble)));
TEMP_FAILURE_RETRY(write(fake_uart_, payload, strlen(payload)));
ALOGD("%s waiting", __func__);
std::mutex mutex;
std::condition_variable done;
EXPECT_CALL(event_cb_, Call(HidlVecMatches(preamble + 1,
sizeof(preamble) - 1, payload)))
.WillOnce(Notify(&mutex, &done));
{
std::unique_lock<std::mutex> lock(mutex);
done.wait(lock);
}
}
testing::MockFunction<void(const hidl_vec<uint8_t>&)> event_cb_;
testing::MockFunction<void(const hidl_vec<uint8_t>&)> acl_cb_;
testing::MockFunction<void(const hidl_vec<uint8_t>&)> sco_cb_;
async::AsyncFdWatcher fd_watcher_;
H4Protocol* protocol_;
int fake_uart_;
};
// Test sending data sends correct data onto the UART
TEST_F(H4ProtocolTest, TestSends) {
SendAndReadUartOutbound(HCI_PACKET_TYPE_COMMAND, sample_data1);
SendAndReadUartOutbound(HCI_PACKET_TYPE_ACL_DATA, sample_data2);
SendAndReadUartOutbound(HCI_PACKET_TYPE_SCO_DATA, sample_data3);
}
// Ensure we properly parse data coming from the UART
TEST_F(H4ProtocolTest, TestReads) {
WriteAndExpectInboundAclData(acl_data);
WriteAndExpectInboundScoData(sco_data);
WriteAndExpectInboundEvent(event_data);
}
} // namespace implementation
} // namespace V1_0
} // namespace bluetooth
} // namespace hardware
} // namespace android
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