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/*
* Copyright (C) 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 <android-base/logging.h>
#include <android-base/parseint.h>
#include <android/hardware/automotive/can/1.0/ICanController.h>
#include <android/hidl/manager/1.2/IServiceManager.h>
#include <hidl-utils/hidl-utils.h>
#include <libcanhaltools/libcanhaltools.h>
#include <iostream>
#include <string>
namespace android::hardware::automotive::can {
using ICanController = V1_0::ICanController;
static void usage() {
std::cerr << "CAN bus HAL Control tool" << std::endl;
std::cerr << std::endl << "usage:" << std::endl << std::endl;
std::cerr << "canhalctrl up <bus name> <type> <interface> [bitrate]" << std::endl;
std::cerr << "where:" << std::endl;
std::cerr << " bus name - name under which ICanBus will be published" << std::endl;
std::cerr << " type - one of: virtual, socketcan, slcan, indexed" << std::endl;
std::cerr << " interface - hardware identifier (like can0, vcan0, /dev/ttyUSB0)" << std::endl;
std::cerr << " bitrate - such as 100000, 125000, 250000, 500000" << std::endl;
std::cerr << std::endl;
std::cerr << "canhalctrl down <bus name>" << std::endl;
std::cerr << "where:" << std::endl;
std::cerr << " bus name - name under which ICanBus will be published" << std::endl;
}
static int up(const std::string& busName, ICanController::InterfaceType type,
const std::string& interface, uint32_t bitrate) {
bool anySupported = false;
for (auto&& service : libcanhaltools::getControlServices()) {
auto ctrl = ICanController::getService(service);
if (ctrl == nullptr) {
std::cerr << "Couldn't open ICanController/" << service;
continue;
}
if (!libcanhaltools::isSupported(ctrl, type)) continue;
anySupported = true;
ICanController::BusConfig config = {};
config.name = busName;
config.bitrate = bitrate;
// TODO(b/146214370): move interfaceId constructors to a library
using IfCfg = ICanController::BusConfig::InterfaceId;
if (type == ICanController::InterfaceType::VIRTUAL) {
config.interfaceId.virtualif({interface});
} else if (type == ICanController::InterfaceType::SOCKETCAN) {
IfCfg::Socketcan socketcan = {};
socketcan.ifname(interface);
config.interfaceId.socketcan(socketcan);
} else if (type == ICanController::InterfaceType::SLCAN) {
IfCfg::Slcan slcan = {};
slcan.ttyname(interface);
config.interfaceId.slcan(slcan);
} else if (type == ICanController::InterfaceType::INDEXED) {
unsigned idx;
if (!android::base::ParseUint(interface, &idx, unsigned(UINT8_MAX))) {
std::cerr << "Interface index out of range: " << idx;
return -1;
}
config.interfaceId.indexed({uint8_t(idx)});
} else {
CHECK(false) << "Unexpected interface type: " << toString(type);
}
const auto upresult = ctrl->upInterface(config);
if (upresult == ICanController::Result::OK) return 0;
std::cerr << "Failed to bring interface up: " << toString(upresult) << std::endl;
// Let's continue the loop to try other controllers.
}
if (!anySupported) {
std::cerr << "No controller supports " << toString(type) << std::endl;
}
return -1;
}
static int down(const std::string& busName) {
for (auto&& service : libcanhaltools::getControlServices()) {
auto ctrl = ICanController::getService(service);
if (ctrl == nullptr) continue;
if (ctrl->downInterface(busName)) return 0;
}
std::cerr << "Failed to bring interface " << busName << " down (maybe it's down already?)"
<< std::endl;
return -1;
}
static std::optional<ICanController::InterfaceType> parseInterfaceType(const std::string& str) {
if (str == "virtual") return ICanController::InterfaceType::VIRTUAL;
if (str == "socketcan") return ICanController::InterfaceType::SOCKETCAN;
if (str == "slcan") return ICanController::InterfaceType::SLCAN;
if (str == "indexed") return ICanController::InterfaceType::INDEXED;
return std::nullopt;
}
static int main(int argc, char* argv[]) {
base::SetDefaultTag("CanHalControl");
base::SetMinimumLogSeverity(android::base::VERBOSE);
if (argc == 0) {
usage();
return 0;
}
std::string cmd(argv[0]);
argv++;
argc--;
if (cmd == "up") {
if (argc < 3 || argc > 4) {
std::cerr << "Invalid number of arguments to up command: " << argc << std::endl;
usage();
return -1;
}
const std::string busName(argv[0]);
const std::string typeStr(argv[1]);
const std::string interface(argv[2]);
const auto type = parseInterfaceType(typeStr);
if (!type) {
std::cerr << "Invalid interface type: " << typeStr << std::endl;
usage();
return -1;
}
uint32_t bitrate = 0;
if (argc == 4 && !android::base::ParseUint(argv[3], &bitrate)) {
std::cerr << "Invalid bitrate!" << std::endl;
usage();
return -1;
}
return up(busName, *type, interface, bitrate);
} else if (cmd == "down") {
if (argc != 1) {
std::cerr << "Invalid number of arguments to down command: " << argc << std::endl;
usage();
return -1;
}
return down(argv[0]);
} else {
std::cerr << "Invalid command: " << cmd << std::endl;
usage();
return -1;
}
}
} // namespace android::hardware::automotive::can
int main(int argc, char* argv[]) {
if (argc < 1) return -1;
return ::android::hardware::automotive::can::main(--argc, ++argv);
}
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