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Copy pathplugins.c
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159 lines (136 loc) · 5.12 KB
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/*
* Copyright 2003 Niels Provos <provos@citi.umich.edu>
* All rights reserved.
*
* 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
* 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
*/
/*
* Copyright 2003 Christian Kreibich <christian.kreibich@cl.cam.ac.uk>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/types.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/queue.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <syslog.h>
#include <dirent.h>
#include "plugins_config.h"
#include "plugins.h"
/* All plugins are simply stored in an array, as
* we don't have to access them very often -- any direct
* interactions with the plugin are set up by the plugins
* themselves via hooks as defined in hooks.h.
*/
HONEYD_PLUGINS_DECLARE;
struct honeyd_plugin *plugins[] = {
HONEYD_PLUGINS NULL
};
/* The following are the dummy operations we always hook
* into newly created plugins
*/
static int
plugin_dummy_init(void)
{
return 0;
}
/**
* plugin_hook_up - hooks in symbols from dlopenend modules.
* @plugin: plugin to hook up.
*
* The function tries to hook the callback functions that
* define a plugin's characteristics into the @plugin structure,
* then initializes the plugin. Note that the callbacks are
* all initialized with dummy operations so even if we encounter
* a bad plugin, we should still be safe.
*/
static void
plugin_hook_up(struct honeyd_plugin *plugin)
{
const struct honeyd_plugin_cfg *cfg;
if (plugin->name == NULL)
plugin->name = "Unnamed plugin.";
if (plugin->description == NULL)
plugin->description = "No description given.";
if (plugin->author == NULL)
plugin->author = "No author(s) specified.";
if (plugin->version == NULL)
plugin->version = "No version specified.";
if (plugin->init == NULL)
plugin->init = plugin_dummy_init;
cfg = plugins_config_find_item(plugin->name, "enable", HD_CONFIG_INT);
if (cfg == NULL || cfg->cfg_int == 0)
return;
syslog(LOG_INFO, "registering plugin '%s' (%s)",
plugin->name, plugin->version);
plugin->init();
}
void
plugins_init(void)
{
struct honeyd_plugin *plugin, **iter = plugins;
for (plugin = *iter; plugin; plugin = *++iter)
plugin_hook_up(plugin);
}
struct honeyd_plugin *
plugins_find(const char *name)
{
struct honeyd_plugin *plugin, **iter = plugins;
for (plugin = *iter; plugin; plugin = *++iter) {
if (strcasecmp(name, plugin->name) == 0)
return (plugin);
}
return (NULL);
}