142 lines
4.2 KiB
C
142 lines
4.2 KiB
C
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is libguac.
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*
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* The Initial Developer of the Original Code is
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* Michael Jumper.
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include <dlfcn.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "client.h"
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#include "client-handlers.h"
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#include "error.h"
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#include "plugin.h"
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#include "protocol.h"
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#include "socket.h"
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#include "time.h"
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guac_client_plugin* guac_client_plugin_open(const char* protocol) {
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guac_client_plugin* plugin;
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/* Reference to dlopen()'d plugin */
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void* client_plugin_handle;
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/* Client args description */
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const char** client_args;
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/* Pluggable client */
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char protocol_lib[GUAC_PROTOCOL_LIBRARY_LIMIT] =
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GUAC_PROTOCOL_LIBRARY_PREFIX;
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union {
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guac_client_init_handler* client_init;
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void* obj;
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} alias;
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/* Add protocol and .so suffix to protocol_lib */
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strncat(protocol_lib, protocol, GUAC_PROTOCOL_NAME_LIMIT-1);
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strcat(protocol_lib, GUAC_PROTOCOL_LIBRARY_SUFFIX);
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/* Load client plugin */
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client_plugin_handle = dlopen(protocol_lib, RTLD_LAZY);
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if (!client_plugin_handle) {
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guac_error = GUAC_STATUS_BAD_ARGUMENT;
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guac_error_message = dlerror();
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return NULL;
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}
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dlerror(); /* Clear errors */
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/* Get init function */
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alias.obj = dlsym(client_plugin_handle, "guac_client_init");
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/* Fail if cannot find guac_client_init */
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if (dlerror() != NULL) {
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guac_error = GUAC_STATUS_BAD_ARGUMENT;
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guac_error_message = dlerror();
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return NULL;
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}
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/* Get usage strig */
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client_args = (const char**) dlsym(client_plugin_handle, "GUAC_CLIENT_ARGS");
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/* Fail if cannot find GUAC_CLIENT_ARGS */
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if (dlerror() != NULL) {
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guac_error = GUAC_STATUS_BAD_ARGUMENT;
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guac_error_message = dlerror();
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return NULL;
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}
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/* Allocate plugin */
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plugin = malloc(sizeof(guac_client_plugin));
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if (plugin == NULL) {
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guac_error = GUAC_STATUS_NO_MEMORY;
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guac_error_message = "Could not allocate memory for client plugin";
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return NULL;
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}
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/* Init and return plugin */
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plugin->__client_plugin_handle = client_plugin_handle;
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plugin->init_handler = alias.client_init;
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plugin->args = client_args;
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return plugin;
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}
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int guac_client_plugin_close(guac_client_plugin* plugin) {
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/* Unload client plugin */
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if (dlclose(plugin->__client_plugin_handle)) {
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guac_error = GUAC_STATUS_BAD_STATE;
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guac_error_message = dlerror();
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return -1;
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}
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/* Free plugin handle */
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free(plugin);
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return 0;
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}
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int guac_client_plugin_init_client(guac_client_plugin* plugin,
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guac_client* client, int argc, char** argv) {
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return plugin->init_handler(client, argc, argv);
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}
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