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/*
* Copyright (C) 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 "PipeComm"
#include <log/log.h>
#include "qemud.h"
#include "PipeComm.h"
#define CAR_SERVICE_NAME "car"
namespace android {
namespace hardware {
namespace automotive {
namespace vehicle {
namespace V2_0 {
namespace impl {
PipeComm::PipeComm(MessageProcessor* messageProcessor) : CommConn(messageProcessor), mPipeFd(-1) {}
void PipeComm::start() {
int fd = qemud_channel_open(CAR_SERVICE_NAME);
if (fd < 0) {
ALOGE("%s: Could not open connection to service: %s %d", __FUNCTION__, strerror(errno), fd);
return;
}
ALOGI("%s: Starting pipe connection, fd=%d", __FUNCTION__, fd);
mPipeFd = fd;
CommConn::start();
}
void PipeComm::stop() {
if (mPipeFd > 0) {
::close(mPipeFd);
mPipeFd = -1;
}
CommConn::stop();
}
std::vector<uint8_t> PipeComm::read() {
static constexpr int MAX_RX_MSG_SZ = 2048;
std::vector<uint8_t> msg = std::vector<uint8_t>(MAX_RX_MSG_SZ);
int numBytes;
numBytes = qemud_channel_recv(mPipeFd, msg.data(), msg.size());
if (numBytes == MAX_RX_MSG_SZ) {
ALOGE("%s: Received max size = %d", __FUNCTION__, MAX_RX_MSG_SZ);
} else if (numBytes > 0) {
msg.resize(numBytes);
return msg;
} else {
ALOGD("%s: Connection terminated on pipe %d, numBytes=%d", __FUNCTION__, mPipeFd, numBytes);
mPipeFd = -1;
}
return std::vector<uint8_t>();
}
int PipeComm::write(const std::vector<uint8_t>& data) {
int retVal = 0;
if (mPipeFd != -1) {
retVal = qemud_channel_send(mPipeFd, data.data(), data.size());
}
if (retVal < 0) {
retVal = -errno;
ALOGE("%s: send_cmd: (fd=%d): ERROR: %s", __FUNCTION__, mPipeFd, strerror(errno));
}
return retVal;
}
} // impl
} // namespace V2_0
} // namespace vehicle
} // namespace automotive
} // namespace hardware
} // namespace android
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