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-rw-r--r--plugins.c204
1 files changed, 204 insertions, 0 deletions
diff --git a/plugins.c b/plugins.c
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+/* plugins.c
+ * definitions for plugins structures
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@zing.org>
+ * Copyright 1998 Gerald Combs
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#ifdef HAVE_DLFCN_H
+
+#include <time.h>
+
+#include "globals.h"
+
+#include "plugins.h"
+
+/* linked list of all plugins */
+plugin *plugin_list;
+
+/*
+ * add a new plugin to the list
+ * returns :
+ * - 0 : OK
+ * - ENOMEM : memory allocation problem
+ * - EEXIST : the same plugin (i.e. name/version) was already registered.
+ */
+int
+add_plugin(void *handle, gchar *name, gchar *version, gchar *protocol,
+ gchar *filter_string, dfilter *filter,
+ void (*dissector) (const u_char *,
+ int,
+ frame_data *,
+ proto_tree *))
+{
+ plugin *new_plug, *pt_plug;
+
+ pt_plug = plugin_list;
+ if (!pt_plug) /* the list is empty */
+ {
+ new_plug = (plugin *)g_malloc(sizeof(plugin));
+ if (new_plug == NULL) return ENOMEM;
+ plugin_list = new_plug;
+ }
+ else
+ {
+ while (1)
+ {
+ /* check if the same name/version is already registered */
+ if (!strcmp(pt_plug->name, name) &&
+ !strcmp(pt_plug->version, version))
+ {
+ return EEXIST;
+ }
+
+ /* we found the last plugin in the list */
+ if (pt_plug->next == NULL) break;
+
+ pt_plug = pt_plug->next;
+ }
+ new_plug = (plugin *)g_malloc(sizeof(plugin));
+ if (new_plug == NULL) return ENOMEM;
+ pt_plug->next = new_plug;
+ }
+
+ new_plug->handle = handle;
+ new_plug->name = name;
+ new_plug->version = version;
+ new_plug->enabled = FALSE;
+ new_plug->protocol = protocol;
+ new_plug->filter_string = g_strdup(filter_string);
+ new_plug->filter = filter;
+ new_plug->dissector = dissector;
+ new_plug->next = NULL;
+ return 0;
+}
+
+/*
+ * enable a plugin
+ * returns a pointer to the enabled plugin, or NULL if the plugin wasn't found
+ * in the list
+ */
+void *
+enable_plugin(const gchar *name, const gchar *version)
+{
+ plugin *pt_plug;
+
+ pt_plug = plugin_list;
+ while (pt_plug)
+ {
+ if (!strcmp(pt_plug->name, name) && !strcmp(pt_plug->version, version))
+ {
+ pt_plug->enabled = TRUE;
+ return pt_plug;
+ }
+ pt_plug = pt_plug->next;
+ }
+ return NULL;
+}
+
+/*
+ * disable a plugin
+ * returns a pointer to the disabled plugin, or NULL if the plugin wasn't found
+ * in the list
+ */
+void *
+disable_plugin(const gchar *name, const gchar *version)
+{
+ plugin *pt_plug;
+
+ pt_plug = plugin_list;
+ while (pt_plug)
+ {
+ if (!strcmp(pt_plug->name, name) && !strcmp(pt_plug->version, version))
+ {
+ pt_plug->enabled = FALSE;
+ return pt_plug;
+ }
+ pt_plug = pt_plug->next;
+ }
+ return NULL;
+}
+
+/*
+ * find a plugin using its name/version
+ */
+void *
+find_plugin(const gchar *name, const gchar *version)
+{
+ plugin *pt_plug;
+
+ pt_plug = plugin_list;
+ while (pt_plug)
+ {
+ if (!strcmp(pt_plug->name, name) && !strcmp(pt_plug->version, version))
+ {
+ return pt_plug;
+ }
+ pt_plug = pt_plug->next;
+ }
+ return NULL;
+}
+
+/*
+ * check if a plugin is enabled
+ */
+gboolean
+is_enabled(const gchar *name, const gchar *version)
+{
+ plugin *pt_plug;
+
+ pt_plug = plugin_list;
+ while (pt_plug)
+ {
+ if (!strcmp(pt_plug->name, name) && !strcmp(pt_plug->version, version))
+ return pt_plug->enabled;
+ pt_plug = pt_plug->next;
+ }
+ return FALSE;
+}
+
+/*
+ * replace the filter used by a plugin (filter string and dfilter)
+ */
+void
+plugin_replace_filter(const gchar *name, const gchar *version,
+ const gchar *filter_string, dfilter *filter)
+{
+ plugin *pt_plug;
+
+ pt_plug = plugin_list;
+ while (pt_plug)
+ {
+ if (!strcmp(pt_plug->name, name) && !strcmp(pt_plug->version, version))
+ {
+ g_free(pt_plug->filter_string);
+ pt_plug->filter_string = g_strdup(filter_string);
+ dfilter_destroy(pt_plug->filter);
+ pt_plug->filter = filter;
+ return;
+ }
+ pt_plug = pt_plug->next;
+ }
+}
+
+#endif