root/trunk/src/charon/plugins/nm/nm_plugin.c

/*
 * Copyright (C) 2008 Martin Willi
 * Hochschule fuer Technik Rapperswil
 *
 * 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.  See <http://www.fsf.org/copyleft/gpl.txt>.
 *
 * 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.
 *
 * $Id$
 */

#include "nm_plugin.h"
#include "nm_service.h"
#include "nm_creds.h"

#include <daemon.h>
#include <processing/jobs/callback_job.h>

#define CAP_DAC_OVERRIDE 1

typedef struct private_nm_plugin_t private_nm_plugin_t;

/**
 * private data of nm plugin
 */
struct private_nm_plugin_t {

    /**
     * implements plugin interface
     */
    nm_plugin_t public;
    
    /**
     * NetworkManager service (VPNPlugin)
     */
    NMStrongswanPlugin *plugin;
    
    /**
     * Glib main loop for a thread, handles DBUS calls
     */
    GMainLoop *loop;
    
    /**
     * credential set registered at the daemon
     */
    nm_creds_t *creds;
};

/**
 * NM plugin processing routine, creates and handles NMVPNPlugin
 */
static job_requeue_t run(private_nm_plugin_t *this)
{
    this->loop = g_main_loop_new(NULL, FALSE);
    g_main_loop_run(this->loop);
    g_main_loop_unref(this->loop);
    
    return JOB_REQUEUE_NONE;
}

/**
 * Implementation of plugin_t.destroy
 */
static void destroy(private_nm_plugin_t *this)
{
    if (this->loop)
    {
        g_main_loop_quit(this->loop);
    }
    if (this->plugin)
    {
        g_object_unref(this->plugin);
    }
    charon->credentials->remove_set(charon->credentials, &this->creds->set);
    this->creds->destroy(this->creds);
    free(this);
}

/*
 * see header file
 */
plugin_t *plugin_create()
{
    private_nm_plugin_t *this = malloc_thing(private_nm_plugin_t);
    
    this->public.plugin.destroy = (void(*)(plugin_t*))destroy;
    
    this->loop = NULL;
    g_type_init ();
    if (!g_thread_supported())
    {
        g_thread_init(NULL);
    }
    
    this->creds = nm_creds_create();
    charon->credentials->add_set(charon->credentials, &this->creds->set);
    this->plugin = nm_strongswan_plugin_new(this->creds);
    if (!this->plugin)
    {
        DBG1(DBG_CFG, "DBUS binding failed");
        destroy(this);
        return NULL;
    }
    
    /* bypass file permissions to read from users ssh-agent */
    charon->keep_cap(charon, CAP_DAC_OVERRIDE);
    
    charon->processor->queue_job(charon->processor, 
         (job_t*)callback_job_create((callback_job_cb_t)run, this, NULL, NULL));
    
    return &this->public.plugin;
}