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/*
* Copyright (C) 2012 Tobias Brunner
* Copyright (C) 2008-2009 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.
*/
#include "nm_service.h"
#include "nm_creds.h"
#include "nm_handler.h"
#include <hydra.h>
#include <daemon.h>
#include <processing/jobs/callback_job.h>
#ifndef CAP_DAC_OVERRIDE
#define CAP_DAC_OVERRIDE 1
#endif
typedef struct nm_backend_t nm_backend_t;
/**
* Data for the NetworkManager backend.
*/
struct nm_backend_t {
/**
* 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;
/**
* attribute handler regeisterd at the daemon
*/
nm_handler_t *handler;
};
/**
* Global (but private) instance of the NM backend.
*/
static nm_backend_t *nm_backend = NULL;
/**
* NM plugin processing routine, creates and handles NMVPNPlugin
*/
static job_requeue_t run(nm_backend_t *this)
{
this->loop = g_main_loop_new(NULL, FALSE);
g_main_loop_run(this->loop);
return JOB_REQUEUE_NONE;
}
/**
* Cancel the GLib Main Event Loop
*/
static bool cancel(nm_backend_t *this)
{
if (this->loop)
{
if (g_main_loop_is_running(this->loop))
{
g_main_loop_quit(this->loop);
}
g_main_loop_unref(this->loop);
}
return TRUE;
}
/**
* Deinitialize NetworkManager backend
*/
static void nm_backend_deinit()
{
nm_backend_t *this = nm_backend;
if (!this)
{
return;
}
if (this->plugin)
{
g_object_unref(this->plugin);
}
lib->credmgr->remove_set(lib->credmgr, &this->creds->set);
hydra->attributes->remove_handler(hydra->attributes, &this->handler->handler);
this->creds->destroy(this->creds);
this->handler->destroy(this->handler);
free(this);
nm_backend = NULL;
}
/**
* Initialize NetworkManager backend
*/
static bool nm_backend_init()
{
nm_backend_t *this;
#if !GLIB_CHECK_VERSION(2,36,0)
g_type_init ();
#endif
#if !GLIB_CHECK_VERSION(2,23,0)
if (!g_thread_supported())
{
g_thread_init(NULL);
}
#endif
INIT(this,
.creds = nm_creds_create(),
.handler = nm_handler_create(),
);
this->plugin = nm_strongswan_plugin_new(this->creds, this->handler);
nm_backend = this;
hydra->attributes->add_handler(hydra->attributes, &this->handler->handler);
lib->credmgr->add_set(lib->credmgr, &this->creds->set);
if (!this->plugin)
{
DBG1(DBG_CFG, "DBUS binding failed");
nm_backend_deinit();
return FALSE;
}
/* bypass file permissions to read from users ssh-agent */
if (!lib->caps->keep(lib->caps, CAP_DAC_OVERRIDE))
{
DBG1(DBG_CFG, "NM backend requires CAP_DAC_OVERRIDE capability");
nm_backend_deinit();
return FALSE;
}
lib->processor->queue_job(lib->processor,
(job_t*)callback_job_create_with_prio((callback_job_cb_t)run, this,
NULL, (callback_job_cancel_t)cancel, JOB_PRIO_CRITICAL));
return TRUE;
}
/**
* Initialize/deinitialize NetworkManager backend
*/
static bool nm_backend_cb(void *plugin,
plugin_feature_t *feature, bool reg, void *data)
{
if (reg)
{
return nm_backend_init();
}
nm_backend_deinit();
return TRUE;
}
/*
* see header file
*/
void nm_backend_register()
{
static plugin_feature_t features[] = {
PLUGIN_CALLBACK((plugin_feature_callback_t)nm_backend_cb, NULL),
PLUGIN_PROVIDE(CUSTOM, "NetworkManager backend"),
PLUGIN_DEPENDS(CUSTOM, "libcharon"),
PLUGIN_SDEPEND(PRIVKEY, KEY_RSA),
PLUGIN_SDEPEND(PRIVKEY, KEY_ECDSA),
PLUGIN_SDEPEND(CERT_DECODE, CERT_ANY),
PLUGIN_SDEPEND(CERT_DECODE, CERT_X509),
};
lib->plugins->add_static_features(lib->plugins, "nm-backend", features,
countof(features), TRUE);
}
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