150 lines
3.4 KiB
C
150 lines
3.4 KiB
C
/*
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* Copyright (C) 2012-2013 Tobias Brunner
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "kernel_libipsec_plugin.h"
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#include "kernel_libipsec_ipsec.h"
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#include "kernel_libipsec_router.h"
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#include <daemon.h>
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#include <ipsec.h>
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#include <networking/tun_device.h>
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#define TUN_DEFAULT_MTU 1400
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typedef struct private_kernel_libipsec_plugin_t private_kernel_libipsec_plugin_t;
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/**
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* private data of "kernel" libipsec plugin
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*/
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struct private_kernel_libipsec_plugin_t {
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/**
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* implements plugin interface
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*/
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kernel_libipsec_plugin_t public;
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/**
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* TUN device created by this plugin
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*/
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tun_device_t *tun;
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/**
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* Packet router
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*/
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kernel_libipsec_router_t *router;
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};
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METHOD(plugin_t, get_name, char*,
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private_kernel_libipsec_plugin_t *this)
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{
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return "kernel-libipsec";
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}
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/**
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* Create the kernel_libipsec_router_t instance
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*/
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static bool create_router(private_kernel_libipsec_plugin_t *this,
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plugin_feature_t *feature, bool reg, void *arg)
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{
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if (reg)
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{ /* registers as packet handler etc. */
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this->router = kernel_libipsec_router_create();
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}
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else
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{
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DESTROY_IF(this->router);
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}
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return TRUE;
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}
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METHOD(plugin_t, get_features, int,
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private_kernel_libipsec_plugin_t *this, plugin_feature_t *features[])
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{
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static plugin_feature_t f[] = {
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PLUGIN_CALLBACK(kernel_ipsec_register, kernel_libipsec_ipsec_create),
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PLUGIN_PROVIDE(CUSTOM, "kernel-ipsec"),
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PLUGIN_CALLBACK((plugin_feature_callback_t)create_router, NULL),
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PLUGIN_PROVIDE(CUSTOM, "kernel-libipsec-router"),
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PLUGIN_DEPENDS(CUSTOM, "libcharon-receiver"),
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};
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*features = f;
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return countof(f);
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}
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METHOD(plugin_t, destroy, void,
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private_kernel_libipsec_plugin_t *this)
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{
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if (this->tun)
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{
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lib->set(lib, "kernel-libipsec-tun", NULL);
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this->tun->destroy(this->tun);
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}
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libipsec_deinit();
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free(this);
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}
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/*
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* see header file
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*/
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plugin_t *kernel_libipsec_plugin_create()
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{
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private_kernel_libipsec_plugin_t *this;
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if (!lib->caps->check(lib->caps, CAP_NET_ADMIN))
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{ /* required to create TUN devices */
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DBG1(DBG_KNL, "kernel-libipsec plugin requires CAP_NET_ADMIN "
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"capability");
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return NULL;
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}
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INIT(this,
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.public = {
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.plugin = {
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.get_name = _get_name,
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.get_features = _get_features,
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.destroy = _destroy,
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},
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},
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);
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if (!libipsec_init())
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{
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DBG1(DBG_LIB, "initialization of libipsec failed");
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destroy(this);
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return NULL;
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}
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this->tun = tun_device_create("ipsec%d");
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if (!this->tun)
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{
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DBG1(DBG_KNL, "failed to create TUN device");
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destroy(this);
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return NULL;
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}
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if (!this->tun->set_mtu(this->tun, TUN_DEFAULT_MTU) ||
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!this->tun->up(this->tun))
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{
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DBG1(DBG_KNL, "failed to configure TUN device");
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destroy(this);
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return NULL;
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}
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lib->set(lib, "kernel-libipsec-tun", this->tun);
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/* set TUN device as default to install VIPs */
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lib->settings->set_str(lib->settings, "%s.install_virtual_ip_on",
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this->tun->get_name(this->tun), lib->ns);
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return &this->public.plugin;
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}
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