| /* |
| * Copyright (C) 2022 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 <chrono> |
| #include <condition_variable> |
| #include <cstdint> |
| #include <deque> |
| #include <mutex> |
| #include <vector> |
| |
| #include <android-base/thread_annotations.h> |
| |
| #include "chpp/transport.h" |
| |
| using ::std::literals::chrono_literals::operator""ms; |
| |
| namespace chpp::test { |
| |
| /** |
| * Wrapper for a fake CHPP link layer which puts outgoing packets on a queue |
| * where they can be extracted and inspected. |
| */ |
| class FakeLink { |
| public: |
| //! How long CHPP is expected to wait on an ACK for a transmitted packet |
| static constexpr auto kTransportTimeout = |
| std::chrono::duration_cast<std::chrono::milliseconds>( |
| std::chrono::nanoseconds(CHPP_TRANSPORT_TX_TIMEOUT_NS)); |
| |
| // Our default timeout covers the retry timeout, plus some extra buffer to |
| // account for processing delays |
| static constexpr auto kDefaultTimeout = 10 * (kTransportTimeout + 5ms); |
| |
| /** |
| * Call from link send. Makes a copy of the provided buffer and |
| * appends it to the TX packet queue. |
| */ |
| void appendTxPacket(uint8_t *data, size_t len); |
| |
| //! Returns the number of TX packets waiting to be popped |
| int getTxPacketCount(); // int to make EXPECT_EQ against a literal simpler |
| // with -Wsign-compare enabled |
| |
| /** |
| * Wait up to the provided timeout for a packet to hit the TX queue, or return |
| * immediately if a packet is already waiting to be popped. |
| * |
| * @return true if a packet is waiting, false on timeout |
| */ |
| bool waitForTxPacket(std::chrono::milliseconds timeout = kDefaultTimeout); |
| |
| //! Pop and return the oldest packet on the TX queue, or assert if queue is |
| //! empty |
| std::vector<uint8_t> popTxPacket(); |
| |
| //! Empties the TX packet queue |
| void reset(); |
| |
| private: |
| std::mutex mMutex; |
| std::condition_variable mCondVar; |
| std::deque<std::vector<uint8_t>> mTxPackets GUARDED_BY(mMutex); |
| }; |
| |
| } // namespace chpp::test |