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/*
* Copyright 2019 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.
*/
#include "l2cap/internal/le_credit_based_channel_data_controller.h"
#include <gtest/gtest.h>
#include "l2cap/internal/ilink_mock.h"
#include "l2cap/internal/scheduler_mock.h"
#include "l2cap/l2cap_packets.h"
#include "packet/raw_builder.h"
namespace bluetooth {
namespace l2cap {
namespace internal {
namespace {
std::unique_ptr<packet::BasePacketBuilder> CreateSdu(std::vector<uint8_t> payload) {
return std::make_unique<packet::RawBuilder>(std::move(payload));
}
PacketView<kLittleEndian> GetPacketView(std::unique_ptr<packet::BasePacketBuilder> packet) {
auto bytes = std::make_shared<std::vector<uint8_t>>();
BitInserter i(*bytes);
bytes->reserve(packet->size());
packet->Serialize(i);
return packet::PacketView<packet::kLittleEndian>(bytes);
}
void sync_handler(os::Handler* handler) {
std::promise<void> promise;
auto future = promise.get_future();
handler->Post(common::BindOnce(&std::promise<void>::set_value, common::Unretained(&promise)));
auto status = future.wait_for(std::chrono::milliseconds(300));
EXPECT_EQ(status, std::future_status::ready);
}
class LeCreditBasedDataControllerTest : public ::testing::Test {
protected:
void SetUp() override {
thread_ = new os::Thread("test_thread", os::Thread::Priority::NORMAL);
user_handler_ = new os::Handler(thread_);
queue_handler_ = new os::Handler(thread_);
}
void TearDown() override {
queue_handler_->Clear();
user_handler_->Clear();
delete queue_handler_;
delete user_handler_;
delete thread_;
}
os::Thread* thread_ = nullptr;
os::Handler* user_handler_ = nullptr;
os::Handler* queue_handler_ = nullptr;
};
TEST_F(LeCreditBasedDataControllerTest, transmit_unsegmented) {
common::BidiQueue<Scheduler::UpperEnqueue, Scheduler::UpperDequeue> channel_queue{10};
testing::MockScheduler scheduler;
testing::MockILink link;
LeCreditBasedDataController controller{&link, 0x41, 0x41, channel_queue.GetDownEnd(), queue_handler_, &scheduler};
controller.OnCredit(10);
EXPECT_CALL(scheduler, OnPacketsReady(0x41, 1));
controller.OnSdu(CreateSdu({'a', 'b', 'c', 'd'}));
auto next_packet = controller.GetNextPacket();
EXPECT_NE(next_packet, nullptr);
auto view = GetPacketView(std::move(next_packet));
auto pdu_view = BasicFrameView::Create(view);
EXPECT_TRUE(pdu_view.IsValid());
auto first_le_info_view = FirstLeInformationFrameView::Create(pdu_view);
EXPECT_TRUE(first_le_info_view.IsValid());
auto payload = first_le_info_view.GetPayload();
std::string data = std::string(payload.begin(), payload.end());
EXPECT_EQ(data, "abcd");
}
TEST_F(LeCreditBasedDataControllerTest, transmit_segmented) {
common::BidiQueue<Scheduler::UpperEnqueue, Scheduler::UpperDequeue> channel_queue{10};
testing::MockScheduler scheduler;
testing::MockILink link;
LeCreditBasedDataController controller{&link, 0x41, 0x41, channel_queue.GetDownEnd(), queue_handler_, &scheduler};
controller.OnCredit(10);
controller.SetMps(4);
EXPECT_CALL(scheduler, OnPacketsReady(0x41, 2));
// Should be divided into 'ab', and 'cd'
controller.OnSdu(CreateSdu({'a', 'b', 'c', 'd'}));
auto next_packet = controller.GetNextPacket();
EXPECT_NE(next_packet, nullptr);
auto view = GetPacketView(std::move(next_packet));
auto pdu_view = BasicFrameView::Create(view);
EXPECT_TRUE(pdu_view.IsValid());
auto first_le_info_view = FirstLeInformationFrameView::Create(pdu_view);
EXPECT_TRUE(first_le_info_view.IsValid());
auto payload = first_le_info_view.GetPayload();
std::string data = std::string(payload.begin(), payload.end());
EXPECT_EQ(data, "ab");
EXPECT_EQ(first_le_info_view.GetL2capSduLength(), 4);
next_packet = controller.GetNextPacket();
EXPECT_NE(next_packet, nullptr);
view = GetPacketView(std::move(next_packet));
pdu_view = BasicFrameView::Create(view);
EXPECT_TRUE(pdu_view.IsValid());
payload = pdu_view.GetPayload();
data = std::string(payload.begin(), payload.end());
EXPECT_EQ(data, "cd");
}
TEST_F(LeCreditBasedDataControllerTest, receive_unsegmented) {
common::BidiQueue<Scheduler::UpperEnqueue, Scheduler::UpperDequeue> channel_queue{10};
testing::MockScheduler scheduler;
testing::MockILink link;
LeCreditBasedDataController controller{&link, 0x41, 0x41, channel_queue.GetDownEnd(), queue_handler_, &scheduler};
controller.OnCredit(10);
auto segment = CreateSdu({'a', 'b', 'c', 'd'});
auto builder = FirstLeInformationFrameBuilder::Create(0x41, 4, std::move(segment));
auto base_view = GetPacketView(std::move(builder));
controller.OnPdu(base_view);
sync_handler(queue_handler_);
auto payload = channel_queue.GetUpEnd()->TryDequeue();
EXPECT_NE(payload, nullptr);
std::string data = std::string(payload->begin(), payload->end());
EXPECT_EQ(data, "abcd");
}
TEST_F(LeCreditBasedDataControllerTest, receive_segmented) {
common::BidiQueue<Scheduler::UpperEnqueue, Scheduler::UpperDequeue> channel_queue{10};
testing::MockScheduler scheduler;
testing::MockILink link;
LeCreditBasedDataController controller{&link, 0x41, 0x41, channel_queue.GetDownEnd(), queue_handler_, &scheduler};
controller.OnCredit(10);
auto segment1 = CreateSdu({'a', 'b', 'c', 'd'});
auto builder1 = FirstLeInformationFrameBuilder::Create(0x41, 7, std::move(segment1));
auto base_view = GetPacketView(std::move(builder1));
controller.OnPdu(base_view);
auto segment2 = CreateSdu({'e', 'f', 'g'});
auto builder2 = BasicFrameBuilder::Create(0x41, std::move(segment2));
base_view = GetPacketView(std::move(builder2));
EXPECT_CALL(link, SendLeCredit(0x41, 1));
controller.OnPdu(base_view);
sync_handler(queue_handler_);
auto payload = channel_queue.GetUpEnd()->TryDequeue();
EXPECT_NE(payload, nullptr);
std::string data = std::string(payload->begin(), payload->end());
EXPECT_EQ(data, "abcdefg");
}
TEST_F(LeCreditBasedDataControllerTest, receive_segmented_with_wrong_sdu_length) {
common::BidiQueue<Scheduler::UpperEnqueue, Scheduler::UpperDequeue> channel_queue{10};
testing::MockScheduler scheduler;
testing::MockILink link;
LeCreditBasedDataController controller{&link, 0x41, 0x41, channel_queue.GetDownEnd(), queue_handler_, &scheduler};
controller.OnCredit(10);
auto segment1 = CreateSdu({'a', 'b', 'c', 'd'});
auto builder1 = FirstLeInformationFrameBuilder::Create(0x41, 5, std::move(segment1));
auto base_view = GetPacketView(std::move(builder1));
controller.OnPdu(base_view);
auto segment2 = CreateSdu({'e', 'f', 'g'});
auto builder2 = BasicFrameBuilder::Create(0x41, std::move(segment2));
base_view = GetPacketView(std::move(builder2));
controller.OnPdu(base_view);
sync_handler(queue_handler_);
auto payload = channel_queue.GetUpEnd()->TryDequeue();
EXPECT_EQ(payload, nullptr);
}
} // namespace
} // namespace internal
} // namespace l2cap
} // namespace bluetooth
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