/** * FreeRDP: A Remote Desktop Protocol Client * Plugin Loading Utils * * Copyright 2011 Vic Lee * * 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 "config.h" #include #include #include #include #include #include #include #include #ifdef _WIN32 #define DLOPEN(f) LoadLibraryA(f) #define DLSYM(f, n) GetProcAddress(f, n) #define DLCLOSE(f) FreeLibrary(f) #define DLERROR() "" #else #include #include #define DLOPEN(f) dlopen(f, RTLD_LOCAL | RTLD_LAZY) #define DLSYM(f, n) dlsym(f, n) #define DLCLOSE(f) dlclose(f) #define DLERROR() dlerror() #endif void* freerdp_open_library(const char* file) { void* library; library = DLOPEN(file); if (library == NULL) { printf("freerdp_load_library: failed to open %s: %s\n", file, DLERROR()); return NULL; } return library; } void* freerdp_get_library_symbol(void* library, const char* name) { void* symbol; symbol = DLSYM(library, name); if (symbol == NULL) { printf("freerdp_get_library_symbol: failed to load %s: %s\n", name, DLERROR()); return NULL; } return symbol; } boolean freerdp_close_library(void* library) { int status; status = DLCLOSE(library); #ifdef _WIN32 if (status != 0) #else if (status == 0) #endif { printf("freerdp_free_library: failed to close: %s\n", DLERROR()); return false; } return true; } void* freerdp_load_library_symbol(const char* file, const char* name) { void* library; void* symbol; library = DLOPEN(file); if (library == NULL) { printf("freerdp_load_library_symbol: failed to open %s: %s\n", file, DLERROR()); return NULL; } symbol = DLSYM(library, name); if (symbol == NULL) { printf("freerdp_load_library_symbol: failed to load %s: %s\n", file, DLERROR()); return NULL; } return symbol; } void* freerdp_load_plugin(const char* name, const char* entry_name) { char* path; void* entry; char* suffixed_name; suffixed_name = freerdp_append_shared_library_suffix((char*) name); if (!freerdp_path_contains_separator(suffixed_name)) { /* no explicit path given, use default path */ path = freerdp_construct_path(FREERDP_PLUGIN_PATH, suffixed_name); } else { /* explicit path given, use it instead of default path */ path = xstrdup(suffixed_name); } entry = freerdp_load_library_symbol(path, entry_name); xfree(suffixed_name); xfree(path); if (entry == NULL) { printf("freerdp_load_plugin: failed to load %s/%s\n", name, entry_name); return NULL; } return entry; } void* freerdp_load_channel_plugin(rdpSettings* settings, const char* name, const char* entry_name) { char* path; void* entry; char* suffixed_name; suffixed_name = freerdp_append_shared_library_suffix((char*) name); if (!freerdp_path_contains_separator(suffixed_name)) { /* no explicit path given, use default path */ if (!settings->development_mode) { path = freerdp_construct_path(FREERDP_PLUGIN_PATH, suffixed_name); } else { char* dot; char* plugin_name; char* channels_path; char* channel_subpath; dot = strrchr(suffixed_name, '.'); plugin_name = xmalloc((dot - suffixed_name) + 1); strncpy(plugin_name, suffixed_name, (dot - suffixed_name)); plugin_name[(dot - suffixed_name)] = '\0'; channels_path = freerdp_construct_path(settings->development_path, "channels"); channel_subpath = freerdp_construct_path(channels_path, plugin_name); path = freerdp_construct_path(channel_subpath, suffixed_name); xfree(plugin_name); xfree(channels_path); xfree(channel_subpath); } } else { /* explicit path given, use it instead of default path */ path = xstrdup(suffixed_name); } entry = freerdp_load_library_symbol(path, entry_name); xfree(suffixed_name); xfree(path); if (entry == NULL) { printf("freerdp_load_channel_plugin: failed to load %s/%s\n", name, entry_name); return NULL; } return entry; }