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/*
* Copyright (C) 2012-2013 Tobias Brunner
* 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 "kernel_libipsec_plugin.h"
#include "kernel_libipsec_ipsec.h"
#include "kernel_libipsec_router.h"
#include <daemon.h>
#include <ipsec.h>
#include <networking/tun_device.h>
#define TUN_DEFAULT_MTU 1400
typedef struct private_kernel_libipsec_plugin_t private_kernel_libipsec_plugin_t;
/**
* private data of "kernel" libipsec plugin
*/
struct private_kernel_libipsec_plugin_t {
/**
* implements plugin interface
*/
kernel_libipsec_plugin_t public;
/**
* TUN device created by this plugin
*/
tun_device_t *tun;
/**
* Packet router
*/
kernel_libipsec_router_t *router;
};
METHOD(plugin_t, get_name, char*,
private_kernel_libipsec_plugin_t *this)
{
return "kernel-libipsec";
}
/**
* Create the kernel_libipsec_router_t instance
*/
static bool create_router(private_kernel_libipsec_plugin_t *this,
plugin_feature_t *feature, bool reg, void *arg)
{
if (reg)
{ /* registers as packet handler etc. */
this->router = kernel_libipsec_router_create();
}
else
{
DESTROY_IF(this->router);
}
return TRUE;
}
METHOD(plugin_t, get_features, int,
private_kernel_libipsec_plugin_t *this, plugin_feature_t *features[])
{
static plugin_feature_t f[] = {
PLUGIN_CALLBACK(kernel_ipsec_register, kernel_libipsec_ipsec_create),
PLUGIN_PROVIDE(CUSTOM, "kernel-ipsec"),
PLUGIN_CALLBACK((plugin_feature_callback_t)create_router, NULL),
PLUGIN_PROVIDE(CUSTOM, "kernel-libipsec-router"),
PLUGIN_DEPENDS(CUSTOM, "libcharon-receiver"),
};
*features = f;
return countof(f);
}
METHOD(plugin_t, destroy, void,
private_kernel_libipsec_plugin_t *this)
{
if (this->tun)
{
lib->set(lib, "kernel-libipsec-tun", NULL);
this->tun->destroy(this->tun);
}
libipsec_deinit();
free(this);
}
/*
* see header file
*/
plugin_t *kernel_libipsec_plugin_create()
{
private_kernel_libipsec_plugin_t *this;
if (!lib->caps->check(lib->caps, CAP_NET_ADMIN))
{ /* required to create TUN devices */
DBG1(DBG_KNL, "kernel-libipsec plugin requires CAP_NET_ADMIN "
"capability");
return NULL;
}
INIT(this,
.public = {
.plugin = {
.get_name = _get_name,
.get_features = _get_features,
.destroy = _destroy,
},
},
);
if (!libipsec_init())
{
DBG1(DBG_LIB, "initialization of libipsec failed");
destroy(this);
return NULL;
}
this->tun = tun_device_create("ipsec%d");
if (!this->tun)
{
DBG1(DBG_KNL, "failed to create TUN device");
destroy(this);
return NULL;
}
if (!this->tun->set_mtu(this->tun, TUN_DEFAULT_MTU) ||
!this->tun->up(this->tun))
{
DBG1(DBG_KNL, "failed to configure TUN device");
destroy(this);
return NULL;
}
lib->set(lib, "kernel-libipsec-tun", this->tun);
/* set TUN device as default to install VIPs */
lib->settings->set_str(lib->settings, "%s.install_virtual_ip_on",
this->tun->get_name(this->tun), lib->ns);
return &this->public.plugin;
}
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