redesigned IKE_SA using a transaction mechanism:

removed old state machine reimplemented IKE_SA setup and delete implemented dead peer detection implemented keep-alives a lot of fixes no rekeying yet
2006-07-05 10:53:20 +00:00
parent b12af2ead6
commit 3dd3c5f39e
71 changed files with 4873 additions and 8187 deletions
@@ -0,0 +1,198 @@
+/**
+ * @file dead_peer_detection.c
+ *
+ * @brief Implementation of the dead_peer_detection transaction.
+ *
+ */
+
+/*
+ * Copyright (C) 2006 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 "dead_peer_detection.h"
+
+#include <daemon.h>
+
+
+typedef struct private_dead_peer_detection_t private_dead_peer_detection_t;
+
+/**
+ * Private members of a dead_peer_detection_t object..
+ */
+struct private_dead_peer_detection_t {
+	
+	/**
+	 * Public methods and transaction_t interface.
+	 */
+	dead_peer_detection_t public;
+	
+	/**
+	 * Assigned IKE_SA.
+	 */
+	ike_sa_t *ike_sa;
+	
+	/**
+	 * Message sent by our peer, if already generated
+	 */
+	message_t *message;
+	
+	/**
+	 * Message ID this transaction uses
+	 */
+	u_int32_t message_id;
+	
+	/**
+	 * Times we did send the request
+	 */
+	u_int32_t requested;
+	
+	/**
+	 * Assigned logger.
+	 */
+	logger_t *logger;
+};
+
+/**
+ * Implementation of transaction_t.get_message_id.
+ */
+static u_int32_t get_message_id(private_dead_peer_detection_t *this)
+{
+	return this->message_id;
+}
+
+/**
+ * Implementation of transaction_t.requested.
+ */
+static u_int32_t requested(private_dead_peer_detection_t *this)
+{
+	return this->requested++;
+}
+
+/**
+ * Implementation of transaction_t.get_request.
+ */
+static status_t get_request(private_dead_peer_detection_t *this, message_t **result)
+{
+	message_t *request;
+	connection_t *connection;
+	host_t *me, *other;
+	
+	/* check if we already have built a message (retransmission) */
+	if (this->message)
+	{
+		*result = this->message;
+		return SUCCESS;
+	}
+	
+	connection = this->ike_sa->get_connection(this->ike_sa);
+	me = connection->get_my_host(connection);
+	other = connection->get_other_host(connection);
+	
+	/* build the request */
+	request = message_create();
+	request->set_source(request, me->clone(me));
+	request->set_destination(request, other->clone(other));
+	request->set_exchange_type(request, INFORMATIONAL);
+	request->set_request(request, TRUE);
+	request->set_message_id(request, this->message_id);
+	request->set_ike_sa_id(request, this->ike_sa->get_id(this->ike_sa));
+	/* apply for caller */
+	*result = request;
+	/* store for retransmission */
+	this->message = request;
+	
+	return SUCCESS;
+}
+
+/**
+ * Implementation of transaction_t.get_response.
+ */
+static status_t get_response(private_dead_peer_detection_t *this, message_t *request, 
+							 message_t **result, transaction_t **next)
+{
+	host_t *me, *other;
+	message_t *response;
+	connection_t *connection;
+	
+	/* check if we already have built a response (retransmission) */
+	if (this->message)
+	{
+		*result = this->message;
+		return SUCCESS;
+	}
+	
+	connection = this->ike_sa->get_connection(this->ike_sa);
+	me = connection->get_my_host(connection);
+	other = connection->get_other_host(connection);
+	
+	/* set up response */
+	response = message_create();
+	response->set_source(response, me->clone(me));
+	response->set_destination(response, other->clone(other));
+	response->set_exchange_type(response, INFORMATIONAL);
+	response->set_request(response, FALSE);
+	response->set_message_id(response, this->message_id);
+	response->set_ike_sa_id(response, this->ike_sa->get_id(this->ike_sa));
+	this->message = response;
+	*result = response;
+	
+	return SUCCESS;
+}
+
+
+/**
+ * Implementation of transaction_t.conclude
+ */
+static status_t conclude(private_dead_peer_detection_t *this, message_t *response, 
+						 transaction_t **transaction)
+{
+	return SUCCESS;
+}
+
+/**
+ * implements transaction_t.destroy
+ */
+static void destroy(private_dead_peer_detection_t *this)
+{
+	if (this->message)
+	{
+		this->message->destroy(this->message);
+	}
+	free(this);
+}
+
+/*
+ * Described in header.
+ */
+dead_peer_detection_t *dead_peer_detection_create(ike_sa_t *ike_sa, u_int32_t message_id)
+{
+	private_dead_peer_detection_t *this = malloc_thing(private_dead_peer_detection_t);
+	
+	/* transaction interface functions */
+	this->public.transaction.get_request = (status_t(*)(transaction_t*,message_t**))get_request;
+	this->public.transaction.get_response = (status_t(*)(transaction_t*,message_t*,message_t**,transaction_t**))get_response;
+	this->public.transaction.conclude = (status_t(*)(transaction_t*,message_t*,transaction_t**))conclude;
+	this->public.transaction.get_message_id = (u_int32_t(*)(transaction_t*))get_message_id;
+	this->public.transaction.requested = (u_int32_t(*)(transaction_t*))requested;
+	this->public.transaction.destroy = (void(*)(transaction_t*))destroy;
+	
+	/* private data */
+	this->ike_sa = ike_sa;
+	this->message_id = message_id;
+	this->message = NULL;
+	this->requested = 0;
+	this->logger = logger_manager->get_logger(logger_manager, IKE_SA);
+	
+	return &this->public;
+}