1 files changed, 172 insertions, 0 deletions
diff --git a/src/libcharon/sa/ikev2/tasks/ike_auth_lifetime.c b/src/libcharon/sa/ikev2/tasks/ike_auth_lifetime.c
new file mode 100644
index 000000000..a7d162e68
--- /dev/null
+++ b/src/libcharon/sa/ikev2/tasks/ike_auth_lifetime.c
@@ -0,0 +1,172 @@
+/*
+ * Copyright (C) 2007 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 "ike_auth_lifetime.h"
+
+#include <time.h>
+
+#include <daemon.h>
+#include <encoding/payloads/notify_payload.h>
+
+
+typedef struct private_ike_auth_lifetime_t private_ike_auth_lifetime_t;
+
+/**
+ * Private members of a ike_auth_lifetime_t task.
+ */
+struct private_ike_auth_lifetime_t {
+
+	/**
+	 * Public methods and task_t interface.
+	 */
+	ike_auth_lifetime_t public;
+
+	/**
+	 * Assigned IKE_SA.
+	 */
+	ike_sa_t *ike_sa;
+};
+
+/**
+ * add the AUTH_LIFETIME notify to the message
+ */
+static void add_auth_lifetime(private_ike_auth_lifetime_t *this, message_t *message)
+{
+	chunk_t chunk;
+	u_int32_t lifetime;
+
+	lifetime = this->ike_sa->get_statistic(this->ike_sa, STAT_REAUTH);
+	if (lifetime)
+	{
+		lifetime -= time_monotonic(NULL);
+		chunk = chunk_from_thing(lifetime);
+		*(u_int32_t*)chunk.ptr = htonl(lifetime);
+		message->add_notify(message, FALSE, AUTH_LIFETIME, chunk);
+	}
+}
+
+/**
+ * read notifys from message and evaluate them
+ */
+static void process_payloads(private_ike_auth_lifetime_t *this, message_t *message)
+{
+	notify_payload_t *notify;
+	chunk_t data;
+	u_int32_t lifetime;
+
+	notify = message->get_notify(message, AUTH_LIFETIME);
+	if (notify)
+	{
+		data = notify->get_notification_data(notify);
+		lifetime = ntohl(*(u_int32_t*)data.ptr);
+		this->ike_sa->set_auth_lifetime(this->ike_sa, lifetime);
+	}
+}
+
+METHOD(task_t, build_i, status_t,
+	private_ike_auth_lifetime_t *this, message_t *message)
+{
+	if (message->get_exchange_type(message) == INFORMATIONAL)
+	{
+		add_auth_lifetime(this, message);
+		return SUCCESS;
+	}
+	return NEED_MORE;
+}
+
+METHOD(task_t, process_r, status_t,
+	private_ike_auth_lifetime_t *this, message_t *message)
+{
+	if (message->get_exchange_type(message) == INFORMATIONAL)
+	{
+		process_payloads(this, message);
+		return SUCCESS;
+	}
+	return NEED_MORE;
+}
+
+METHOD(task_t, build_r, status_t,
+	private_ike_auth_lifetime_t *this, message_t *message)
+{
+	if (message->get_exchange_type(message) == IKE_AUTH &&
+		this->ike_sa->get_state(this->ike_sa) == IKE_ESTABLISHED)
+	{
+		add_auth_lifetime(this, message);
+		return SUCCESS;
+	}
+	return NEED_MORE;
+}
+
+METHOD(task_t, process_i, status_t,
+	private_ike_auth_lifetime_t *this, message_t *message)
+{
+	if (message->get_exchange_type(message) == IKE_AUTH &&
+		this->ike_sa->get_state(this->ike_sa) == IKE_ESTABLISHED)
+	{
+		process_payloads(this, message);
+		return SUCCESS;
+	}
+	return NEED_MORE;
+}
+
+METHOD(task_t, get_type, task_type_t,
+	private_ike_auth_lifetime_t *this)
+{
+	return TASK_IKE_AUTH_LIFETIME;
+}
+
+METHOD(task_t, migrate, void,
+	private_ike_auth_lifetime_t *this, ike_sa_t *ike_sa)
+{
+	this->ike_sa = ike_sa;
+}
+
+METHOD(task_t, destroy, void,
+	private_ike_auth_lifetime_t *this)
+{
+	free(this);
+}
+
+/*
+ * Described in header.
+ */
+ike_auth_lifetime_t *ike_auth_lifetime_create(ike_sa_t *ike_sa, bool initiator)
+{
+	private_ike_auth_lifetime_t *this;
+
+	INIT(this,
+		.public = {
+			.task = {
+				.get_type = _get_type,
+				.migrate = _migrate,
+				.destroy = _destroy,
+			},
+		},
+		.ike_sa = ike_sa,
+	);
+
+	if (initiator)
+	{
+		this->public.task.build = _build_i;
+		this->public.task.process = _process_i;
+	}
+	else
+	{
+		this->public.task.build = _build_r;
+		this->public.task.process = _process_r;
+	}
+
+	return &this->public;
+}