1 /*
2 * Copyright (C) 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "canbus_config.pb.h"
18 #include "canprototools.h"
19
20 #include <android-base/logging.h>
21 #include <android/hardware/automotive/can/1.0/ICanController.h>
22 #include <libcanhaltools/libcanhaltools.h>
23
24 #include <chrono>
25 #include <thread>
26
27 namespace android::hardware::automotive::can {
28
29 using ICanController = V1_0::ICanController;
30
31 /**
32 * Takes output from parsed protobuf config and uses it to configure the CAN HAL.
33 *
34 * \param pb_cfg is an instance of the autogenerated protobuf object for our configuration.
35 * \return boolean status, true on success, false on failure.
36 */
processPbCfg(const config::CanBusConfig & pb_cfg)37 static bool processPbCfg(const config::CanBusConfig& pb_cfg) {
38 for (auto const& bus : pb_cfg.buses()) {
39 if (bus.name().empty()) {
40 LOG(ERROR) << "Invalid config: Bus config must have a valid name field";
41 return false;
42 }
43
44 LOG(INFO) << "Configure " << bus.name();
45 auto bus_cfg = config::fromPbBus(bus);
46 if (!bus_cfg.has_value()) {
47 return false;
48 }
49
50 // TODO(149405589): remove this sleep and associated includes.
51 std::this_thread::sleep_for(std::chrono::seconds(1));
52 if (libcanhaltools::configureIface(*bus_cfg) != ICanController::Result::OK) {
53 LOG(ERROR) << "No controller supports " << bus.name() << std::endl;
54 // TODO(149405589): add retry logic in case a bus fails to come up.
55 continue;
56 }
57 LOG(INFO) << bus.name() << " has been successfully configured!";
58 }
59 return true;
60 }
61
62 /**
63 * This kicks off the CAN HAL configuration process. This starts the following:
64 * 1. Reading the config file
65 * 2. Setting up CAN buses
66 * 3. Handling services
67 * \param filepath is a string specifying the absolute path of the config file
68 * \return boolean status, true on success, false on failure
69 */
configuratorStart(const std::string & filepath)70 static bool configuratorStart(const std::string& filepath) {
71 base::SetDefaultTag("CanConfigurator");
72
73 LOG(WARNING) << "The HIDL version of CAN HAL has been deprecated, if this tool fails with "
74 << "SIGABRT, you may need canhalconfigurator-aidl instead.";
75
76 auto pb_cfg = config::parseConfigFile(filepath);
77 if (!pb_cfg.has_value()) {
78 return false;
79 }
80
81 // process the rest of the config file data and configure the CAN buses.
82 if (!processPbCfg(*pb_cfg)) {
83 return false;
84 }
85 LOG(INFO) << "CAN HAL has been configured!";
86 return true;
87 }
88
89 } // namespace android::hardware::automotive::can
90
main(int argc,char * argv[])91 int main(int argc, char* argv[]) {
92 std::string config_filepath = "/etc/canbus_config.pb";
93
94 // allow for CLI specification of a config file.
95 if (argc == 2) {
96 config_filepath = argv[1];
97 } else if (argc > 2) {
98 std::cerr << "usage: " << argv[0] << " [optional config filepath]";
99 return 1;
100 }
101
102 if (!::android::hardware::automotive::can::configuratorStart(config_filepath)) {
103 return 1;
104 }
105 return 0;
106 }
107