106 lines
2.5 KiB
C++
106 lines
2.5 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "PipeComm"
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#include <log/log.h>
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#include "qemud.h"
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#include "PipeComm.h"
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#define CAR_SERVICE_NAME "car"
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namespace android {
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namespace hardware {
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namespace automotive {
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namespace vehicle {
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namespace V2_0 {
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namespace impl {
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PipeComm::PipeComm(MessageProcessor* messageProcessor) : CommConn(messageProcessor), mPipeFd(-1) {}
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void PipeComm::start() {
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int fd = qemud_channel_open(CAR_SERVICE_NAME);
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if (fd < 0) {
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ALOGE("%s: Could not open connection to service: %s %d", __FUNCTION__, strerror(errno), fd);
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return;
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}
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ALOGI("%s: Starting pipe connection, fd=%d", __FUNCTION__, fd);
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mPipeFd = fd;
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CommConn::start();
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}
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void PipeComm::stop() {
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if (mPipeFd > 0) {
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::close(mPipeFd);
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mPipeFd = -1;
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}
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CommConn::stop();
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}
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std::vector<uint8_t> PipeComm::read() {
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static constexpr int MAX_RX_MSG_SZ = 2048;
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std::vector<uint8_t> msg = std::vector<uint8_t>(MAX_RX_MSG_SZ);
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int numBytes;
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numBytes = qemud_channel_recv(mPipeFd, msg.data(), msg.size());
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if (numBytes == MAX_RX_MSG_SZ) {
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ALOGE("%s: Received max size = %d", __FUNCTION__, MAX_RX_MSG_SZ);
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} else if (numBytes > 0) {
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msg.resize(numBytes);
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return msg;
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} else {
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ALOGD("%s: Connection terminated on pipe %d, numBytes=%d", __FUNCTION__, mPipeFd, numBytes);
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mPipeFd = -1;
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}
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return std::vector<uint8_t>();
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}
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int PipeComm::write(const std::vector<uint8_t>& data) {
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int retVal = 0;
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if (mPipeFd != -1) {
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retVal = qemud_channel_send(mPipeFd, data.data(), data.size());
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}
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if (retVal < 0) {
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retVal = -errno;
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ALOGE("%s: send_cmd: (fd=%d): ERROR: %s", __FUNCTION__, mPipeFd, strerror(errno));
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}
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return retVal;
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}
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} // impl
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} // namespace V2_0
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} // namespace vehicle
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} // namespace automotive
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} // namespace hardware
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} // namespace android
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