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// Copyright (C) 2016-2021 Bayerische Motoren Werke Aktiengesellschaft (BMW AG)
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include <sstream>
#include <vector>
#include <stdlib.h>
#include <iomanip>
#include <iostream>
#ifdef _WIN32
#ifndef _WINSOCKAPI_
#include <Windows.h>
#endif
#else
#include <dlfcn.h>
#endif
#include <vsomeip/plugins/application_plugin.hpp>
#include <vsomeip/plugins/pre_configuration_plugin.hpp>
#include <vsomeip/internal/logger.hpp>
#include "../include/plugin_manager_impl.hpp"
#ifdef ANDROID
#include "../../configuration/include/internal_android.hpp"
#else
#include "../../configuration/include/internal.hpp"
#endif // ANDROID
#include "../../utility/include/utility.hpp"
namespace vsomeip_v3 {
std::shared_ptr<plugin_manager_impl> plugin_manager_impl::the_plugin_manager__ =
std::make_shared<plugin_manager_impl>();
std::shared_ptr<plugin_manager_impl> plugin_manager_impl::get() {
return the_plugin_manager__;
}
plugin_manager_impl::plugin_manager_impl() :
plugins_loaded_(false) {
}
plugin_manager_impl::~plugin_manager_impl() {
handles_.clear();
plugins_.clear();
}
void plugin_manager_impl::load_plugins() {
{
std::lock_guard<std::mutex> its_lock_start_stop(loader_mutex_);
if (plugins_loaded_) {
return;
}
plugins_loaded_ = true;
}
// Get plug-ins libraries from environment
std::vector<std::string> plugins;
const char *its_plugins = getenv(VSOMEIP_ENV_LOAD_PLUGINS);
if (nullptr != its_plugins) {
std::string token;
std::stringstream ss(its_plugins);
while(std::getline(ss, token, ',')) {
plugins.push_back(token);
}
}
std::lock_guard<std::recursive_mutex> its_lock_start_stop(plugins_mutex_);
// Load plug-in info from libraries parsed before
for (const auto& plugin_name : plugins) {
void* handle = load_library(plugin_name);
plugin_init_func its_init_func = reinterpret_cast<plugin_init_func>(
load_symbol(handle, VSOMEIP_PLUGIN_INIT_SYMBOL));
if (its_init_func) {
create_plugin_func its_create_func = (*its_init_func)();
if (its_create_func) {
auto its_plugin = (*its_create_func)();
if (its_plugin) {
handles_[its_plugin->get_plugin_type()][plugin_name] = handle;
switch (its_plugin->get_plugin_type()) {
case plugin_type_e::APPLICATION_PLUGIN:
if (its_plugin->get_plugin_version()
== VSOMEIP_APPLICATION_PLUGIN_VERSION) {
add_plugin(its_plugin, plugin_name);
} else {
VSOMEIP_ERROR << "Plugin version mismatch. "
<< "Ignoring application plugin "
<< its_plugin->get_plugin_name();
}
break;
case plugin_type_e::PRE_CONFIGURATION_PLUGIN:
if (its_plugin->get_plugin_version()
== VSOMEIP_PRE_CONFIGURATION_PLUGIN_VERSION) {
add_plugin(its_plugin, plugin_name);
} else {
VSOMEIP_ERROR << "Plugin version mismatch. Ignoring "
<< "pre-configuration plugin "
<< its_plugin->get_plugin_name();
}
break;
default:
break;
}
}
}
}
}
}
std::shared_ptr<plugin> plugin_manager_impl::get_plugin(plugin_type_e _type,
const std::string &_name) {
std::lock_guard<std::recursive_mutex> its_lock_start_stop(plugins_mutex_);
auto its_type = plugins_.find(_type);
if (its_type != plugins_.end()) {
auto its_name = its_type->second.find(_name);
if (its_name != its_type->second.end()) {
return its_name->second;
}
}
return load_plugin(_name, _type, 1);
}
std::shared_ptr<plugin> plugin_manager_impl::load_plugin(const std::string& _library,
plugin_type_e _type, uint32_t _version) {
void* handle = load_library(_library);
plugin_init_func its_init_func = reinterpret_cast<plugin_init_func>(
load_symbol(handle, VSOMEIP_PLUGIN_INIT_SYMBOL));
if (its_init_func) {
create_plugin_func its_create_func = (*its_init_func)();
if (its_create_func) {
handles_[_type][_library] = handle;
auto its_plugin = (*its_create_func)();
if (its_plugin) {
if (its_plugin->get_plugin_type() == _type
&& its_plugin->get_plugin_version() == _version) {
add_plugin(its_plugin, _library);
return its_plugin;
} else {
VSOMEIP_ERROR << "Plugin version mismatch. Ignoring plugin "
<< its_plugin->get_plugin_name();
}
}
}
}
return nullptr;
}
bool plugin_manager_impl::unload_plugin(plugin_type_e _type) {
std::lock_guard<std::recursive_mutex> its_lock_start_stop(plugins_mutex_);
const auto found_handle = handles_.find(_type);
if (found_handle != handles_.end()) {
for (const auto& its_name : found_handle->second) {
#ifdef _WIN32
FreeLibrary((HMODULE)its_name.second);
#else
if (dlclose(its_name.second)) {
VSOMEIP_ERROR << "Unloading failed: (" << dlerror() << ")";
}
#endif
}
} else {
VSOMEIP_ERROR << "plugin_manager_impl::unload_plugin didn't find plugin"
<< " type:" << (int)_type;
return false;
}
return plugins_.erase(_type);
}
void plugin_manager_impl::add_plugin(const std::shared_ptr<plugin> &_plugin, const std::string& _name) {
plugins_[_plugin->get_plugin_type()][_name] = _plugin;
}
void * plugin_manager_impl::load_library(const std::string &_path) {
#ifdef _WIN32
return LoadLibrary(_path.c_str());
#else
return dlopen(_path.c_str(), RTLD_LAZY | RTLD_GLOBAL);
#endif
}
void * plugin_manager_impl::load_symbol(void * _handle, const std::string &_symbol_name) {
void* symbol = nullptr;
if (_handle) {
#ifdef _WIN32
symbol = GetProcAddress(reinterpret_cast<HMODULE>(_handle), _symbol_name.c_str());
#else
symbol = dlsym(_handle, _symbol_name.c_str());
#endif
if (!symbol) {
char* error_message = nullptr;
#ifdef _WIN32
DWORD error_code = GetLastError();
FormatMessageA(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
nullptr,
error_code,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
reinterpret_cast<LPSTR>(&error_message),
0,
nullptr
);
#else
error_message = dlerror();
#endif
VSOMEIP_ERROR << "Cannot load symbol " << std::quoted(_symbol_name) << " because: " << error_message;
#ifdef _WIN32
// Required to release memory allocated by FormatMessageA()
LocalFree(error_message);
#endif
}
}
return symbol;
}
void plugin_manager_impl::unload_library(void * _handle) {
if (_handle) {
#ifdef _WIN32
FreeLibrary(reinterpret_cast<HMODULE>(_handle));
#else
dlclose(_handle);
#endif
}
}
} // namespace vsomeip_v3
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