2010-05-30 21:33:06 +00:00
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/*
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* uhub - A tiny ADC p2p connection hub
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* Copyright (C) 2007-2010, Jan Vidar Krey
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "uhub.h"
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#ifdef PLUGIN_SUPPORT
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2010-06-06 14:15:15 +00:00
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#include "plugin_api/handle.h"
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2010-05-30 21:33:06 +00:00
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2010-06-06 14:15:15 +00:00
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struct uhub_plugin* plugin_open(const char* filename)
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2010-05-30 21:33:06 +00:00
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{
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#ifdef HAVE_DLOPEN
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struct uhub_plugin* plugin = (struct uhub_plugin*) hub_malloc_zero(sizeof(struct uhub_plugin));
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if (!plugin)
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{
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return 0;
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}
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plugin->handle = dlopen(filename, RTLD_LAZY);
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if (!plugin->handle)
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{
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LOG_ERROR("Unable to open plugin %s: %s", filename, dlerror());
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hub_free(plugin);
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return 0;
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}
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return plugin;
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#else
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return 0;
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#endif
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}
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2010-06-06 14:15:15 +00:00
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void plugin_close(struct uhub_plugin* plugin)
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2010-05-30 21:33:06 +00:00
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{
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#ifdef HAVE_DLOPEN
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dlclose(plugin->handle);
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hub_free(plugin);
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#endif
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}
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2010-06-06 14:15:15 +00:00
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void* plugin_lookup_symbol(struct uhub_plugin* plugin, const char* symbol)
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2010-05-30 21:33:06 +00:00
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{
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#ifdef HAVE_DLOPEN
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void* addr = dlsym(plugin->handle, symbol);
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return addr;
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#else
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return 0;
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#endif
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}
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2010-06-06 14:15:15 +00:00
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struct uhub_plugin_handle* plugin_load(const char* filename, const char* config)
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{
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plugin_register_f register_f;
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plugin_unregister_f unregister_f;
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int ret;
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struct uhub_plugin_handle* handle = hub_malloc_zero(sizeof(struct uhub_plugin_handle));
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struct uhub_plugin* plugin = plugin_open(filename);
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if (!plugin)
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return NULL;
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if (!handle)
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{
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plugin_close(plugin);
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return NULL;
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}
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handle->handle = plugin;
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register_f = plugin_lookup_symbol(plugin, "plugin_register");
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unregister_f = plugin_lookup_symbol(plugin, "plugin_unregister");
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if (register_f && unregister_f)
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{
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ret = register_f(handle, config);
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if (ret == 0)
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{
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if (handle->plugin_api_version == PLUGIN_API_VERSION && handle->plugin_funcs_size == sizeof(struct plugin_funcs))
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{
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LOG_INFO("Loaded plugin: %s: \"%s\", version %s.", filename, handle->name, handle->version);
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return handle;
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}
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else
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{
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LOG_ERROR("Unable to load plugin: %s - API version mistmatch", filename);
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}
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}
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else
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{
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LOG_ERROR("Unable to load plugin: %s - Failed to initialize", filename);
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}
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}
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plugin_close(plugin);
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hub_free(handle);
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return NULL;
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}
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2010-05-30 21:33:06 +00:00
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#endif /* PLUGIN_SUPPORT */
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