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/*
* Copyright (c) 2021 Cisco and/or its affiliates.
* 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 <core/errors.h>
#include <core/global_configuration.h>
#include <core/portal.h>
#include <hicn/transport/interfaces/global_conf_interface.h>
#include <hicn/transport/portability/platform.h>
#include <hicn/transport/utils/file.h>
#include <libconfig.h++>
using namespace transport::interface::global_config;
namespace transport {
namespace core {
#ifdef ANDROID
static const constexpr char default_module[] = "";
#elif defined(MACINTOSH)
static const constexpr char default_module[] = "hicnlight_module.dylib";
#elif defined(LINUX)
static const constexpr char default_module[] = "hicnlight_module.so";
#elif defined(WINDOWS)
static const constexpr char default_module[] = "hicnlight_module.lib";
#endif
IoModuleConfiguration Portal::conf_;
std::string Portal::io_module_path_ = defaultIoModule();
std::string Portal::defaultIoModule() {
using namespace std::placeholders;
GlobalConfiguration::getInstance().registerConfigurationParser(
io_module_section,
std::bind(&Portal::parseIoModuleConfiguration, _1, _2));
GlobalConfiguration::getInstance().registerConfigurationGetter(
io_module_section, std::bind(&Portal::getModuleConfiguration, _1, _2));
GlobalConfiguration::getInstance().registerConfigurationSetter(
io_module_section, std::bind(&Portal::setModuleConfiguration, _1, _2));
// return default
conf_.name = default_module;
return default_module;
}
void Portal::getModuleConfiguration(ConfigurationObject& object,
std::error_code& ec) {
assert(object.getKey() == io_module_section);
auto conf = dynamic_cast<const IoModuleConfiguration&>(object);
conf = conf_;
ec = std::error_code();
}
std::string getIoModulePath(const std::string& name,
const std::vector<std::string>& paths,
std::error_code& ec) {
#ifdef LINUX
std::string extension = ".so";
#elif defined(MACINTOSH)
std::string extension = ".dylib";
#elif defined(WINDOWS)
std::string extension = ".lib";
#else
#error "Platform not supported.";
#endif
std::string complete_path = name;
if (name.empty()) {
ec = make_error_code(core_error::configuration_parse_failed);
return "";
}
complete_path += extension;
for (auto& p : paths) {
if (p.at(0) != '/') {
TRANSPORT_LOGW("Path %s is not an absolute path. Ignoring it.",
p.c_str());
continue;
}
if (utils::File::exists(p + "/" + complete_path)) {
complete_path = p + "/" + complete_path;
break;
}
}
return complete_path;
}
void Portal::setModuleConfiguration(const ConfigurationObject& object,
std::error_code& ec) {
assert(object.getKey() == io_module_section);
const IoModuleConfiguration& conf =
dynamic_cast<const IoModuleConfiguration&>(object);
auto path = getIoModulePath(conf.name, conf.search_path, ec);
if (!ec) {
conf_ = conf;
io_module_path_ = path;
}
}
void Portal::parseIoModuleConfiguration(const libconfig::Setting& io_config,
std::error_code& ec) {
using namespace libconfig;
// path property: the list of paths where to look for the module.
std::vector<std::string> paths;
std::string name;
if (io_config.exists("path")) {
// get path where looking for modules
const Setting& path_list = io_config.lookup("path");
auto count = path_list.getLength();
for (int i = 0; i < count; i++) {
paths.emplace_back(path_list[i].c_str());
}
}
if (io_config.exists("name")) {
io_config.lookupValue("name", name);
} else {
ec = make_error_code(core_error::configuration_parse_failed);
return;
}
auto path = getIoModulePath(name, paths, ec);
if (!ec) {
conf_.name = name;
conf_.search_path = paths;
io_module_path_ = path;
}
}
} // namespace core
} // namespace transport
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