From 6b99c8d9cff7b3e8ae8f3204b99e7ea40f791349 Mon Sep 17 00:00:00 2001
From: Yves-Alexis Perez <corsac@debian.org>
Date: Sun, 25 Aug 2013 15:37:26 +0200
Subject: Imported Upstream version 5.1.0

---
 .../kernel_libipsec/kernel_libipsec_plugin.c       | 149 +++++++++++++++++++++
 1 file changed, 149 insertions(+)
 create mode 100644 src/libcharon/plugins/kernel_libipsec/kernel_libipsec_plugin.c

(limited to 'src/libcharon/plugins/kernel_libipsec/kernel_libipsec_plugin.c')

diff --git a/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_plugin.c b/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_plugin.c
new file mode 100644
index 000000000..56f526217
--- /dev/null
+++ b/src/libcharon/plugins/kernel_libipsec/kernel_libipsec_plugin.c
@@ -0,0 +1,149 @@
+/*
+ * 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), charon->name);
+	return &this->public.plugin;
+}
-- 
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