[svn-upgrade] Integrating new upstream version, strongswan (4.1.1)

1 files changed, 428 insertions, 0 deletions

diff --git a/src/charon/sa/tasks/ike_config.c b/src/charon/sa/tasks/ike_config.c
new file mode 100644
index 000000000..ce29b9220
--- /dev/null
+++ b/src/charon/sa/tasks/ike_config.c
@@ -0,0 +1,428 @@
+/**
+ * @file ike_config.c
+ *
+ * @brief Implementation of the ike_config task.
+ *
+ */
+
+/*
+ * Copyright (C) 2007 Martin Willi
+ * Copyright (C) 2006-2007 Fabian Hartmann, Noah Heusser
+ * 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_config.h"
+
+#include <daemon.h>
+#include <encoding/payloads/cp_payload.h>
+
+typedef struct private_ike_config_t private_ike_config_t;
+
+/**
+ * Private members of a ike_config_t task.
+ */
+struct private_ike_config_t {
+	
+	/**
+	 * Public methods and task_t interface.
+	 */
+	ike_config_t public;
+	
+	/**
+	 * Assigned IKE_SA.
+	 */
+	ike_sa_t *ike_sa;
+	
+	/**
+	 * Are we the initiator?
+	 */
+	bool initiator;
+	
+	/**
+	 * associated policy with virtual IP configuration
+	 */
+	policy_t *policy;
+	
+	/**
+	 * virtual ip
+	 */
+	host_t *virtual_ip;
+	
+	/**
+	 * list of DNS servers
+	 */
+	linked_list_t *dns;
+};
+
+/**
+ * build configuration payloads and attributes
+ */
+static void build_payloads(private_ike_config_t *this, message_t *message,
+						   config_type_t type)
+{
+	cp_payload_t *cp;
+	configuration_attribute_t *ca;
+	chunk_t chunk, prefix;
+	
+	if (!this->virtual_ip)
+	{
+		return;
+	}
+
+	cp = cp_payload_create();
+	cp->set_config_type(cp, type);
+
+	ca = configuration_attribute_create();
+	
+	if (this->virtual_ip->get_family(this->virtual_ip) == AF_INET)
+	{
+		ca->set_type(ca, INTERNAL_IP4_ADDRESS);
+		if (this->virtual_ip->is_anyaddr(this->virtual_ip))
+		{
+			chunk = chunk_empty;
+		}
+		else
+		{
+			chunk = this->virtual_ip->get_address(this->virtual_ip);
+		}
+	}
+	else
+	{
+		ca->set_type(ca, INTERNAL_IP6_ADDRESS);
+		if (this->virtual_ip->is_anyaddr(this->virtual_ip))
+		{
+			chunk = chunk_empty;
+		}
+		else
+		{
+			prefix = chunk_alloca(1);
+			*prefix.ptr = 64;
+			chunk = this->virtual_ip->get_address(this->virtual_ip);
+			chunk = chunk_cata("cc", chunk, prefix);
+		}
+	}
+	ca->set_value(ca, chunk);
+	cp->add_configuration_attribute(cp, ca);
+	
+	/* we currently always add a DNS request if we request an IP */
+	if (this->initiator)
+	{
+		ca = configuration_attribute_create();
+		if (this->virtual_ip->get_family(this->virtual_ip) == AF_INET)
+		{
+			ca->set_type(ca, INTERNAL_IP4_DNS);
+		}
+		else
+		{
+			ca->set_type(ca, INTERNAL_IP6_DNS);
+		}
+		cp->add_configuration_attribute(cp, ca);
+	}
+	else
+	{
+		host_t *ip;
+		iterator_t *iterator = this->dns->create_iterator(this->dns, TRUE);
+		while (iterator->iterate(iterator, (void**)&ip))
+		{
+			ca = configuration_attribute_create();
+			if (ip->get_family(ip) == AF_INET)
+			{
+				ca->set_type(ca, INTERNAL_IP4_DNS);
+			}
+			else
+			{
+				ca->set_type(ca, INTERNAL_IP6_DNS);
+			}
+			chunk = ip->get_address(ip);
+			ca->set_value(ca, chunk);
+			cp->add_configuration_attribute(cp, ca);
+		}
+		iterator->destroy(iterator);
+	}
+	message->add_payload(message, (payload_t*)cp);
+}
+
+/**
+ * process a single configuration attribute
+ */
+static void process_attribute(private_ike_config_t *this,
+							  configuration_attribute_t *ca)
+{
+	host_t *ip;
+	chunk_t addr;
+	int family = AF_INET6;
+	
+	switch (ca->get_type(ca))
+	{
+		case INTERNAL_IP4_ADDRESS:
+			family = AF_INET;
+			/* fall */
+		case INTERNAL_IP6_ADDRESS:
+		{
+			addr = ca->get_value(ca);
+			if (addr.len == 0)
+			{
+				ip = host_create_any(family);
+			}
+			else
+			{
+				/* skip prefix byte in IPv6 payload*/
+				if (family == AF_INET6)
+				{
+					addr.len--; 
+				}
+				ip = host_create_from_chunk(family, addr, 0);
+			}
+			if (ip && !this->virtual_ip)
+			{
+				this->virtual_ip = ip;
+			}
+			break;
+		}
+		case INTERNAL_IP4_DNS:
+			family = AF_INET;
+			/* fall */
+		case INTERNAL_IP6_DNS:
+		{
+			addr = ca->get_value(ca);
+			if (addr.len == 0)
+			{
+				ip = host_create_any(family);
+			}
+			else
+			{
+				ip = host_create_from_chunk(family, addr, 0);
+			}
+			if (ip)
+			{
+				this->dns->insert_last(this->dns, ip);
+			}
+			break;
+		}
+		case INTERNAL_IP4_NBNS:
+		case INTERNAL_IP6_NBNS:
+			/* TODO */
+		default:
+			DBG1(DBG_IKE, "ignoring %N config attribute", 
+	 			 configuration_attribute_type_names,
+	 			 ca->get_type(ca));
+			break;
+	}
+}
+
+/**
+ * Scan for configuration payloads and attributes
+ */
+static void process_payloads(private_ike_config_t *this, message_t *message)
+{
+	iterator_t *iterator, *attributes;
+	payload_t *payload;
+	
+	iterator = message->get_payload_iterator(message);
+	while (iterator->iterate(iterator, (void**)&payload))
+	{
+		if (payload->get_type(payload) == CONFIGURATION)
+		{
+			cp_payload_t *cp = (cp_payload_t*)payload;
+			configuration_attribute_t *ca;
+			switch (cp->get_config_type(cp))
+			{
+				case CFG_REQUEST:
+				case CFG_REPLY:
+				{
+					attributes = cp->create_attribute_iterator(cp);
+					while (attributes->iterate(attributes, (void**)&ca))
+					{
+						process_attribute(this, ca);
+					}
+					attributes->destroy(attributes);
+					break;
+				}
+				default:
+					DBG1(DBG_IKE, "ignoring %N config payload", 
+						 config_type_names, cp->get_config_type(cp));
+					break;
+			}
+		}
+	}
+	iterator->destroy(iterator);
+}
+
+/**
+ * Implementation of task_t.process for initiator
+ */
+static status_t build_i(private_ike_config_t *this, message_t *message)
+{
+	if (message->get_exchange_type(message) == IKE_AUTH &&
+		message->get_payload(message, ID_INITIATOR))
+	{
+		this->virtual_ip = this->policy->get_virtual_ip(this->policy, NULL);
+		
+		build_payloads(this, message, CFG_REQUEST);
+	}
+	
+	return NEED_MORE;
+}
+
+/**
+ * Implementation of task_t.process for responder
+ */
+static status_t process_r(private_ike_config_t *this, message_t *message)
+{
+	if (message->get_exchange_type(message) == IKE_AUTH &&
+		message->get_payload(message, ID_INITIATOR))
+	{
+		process_payloads(this, message);
+	}
+	return NEED_MORE;
+}
+
+/**
+ * Implementation of task_t.build for responder
+ */
+static status_t build_r(private_ike_config_t *this, message_t *message)
+{
+	if (message->get_exchange_type(message) == IKE_AUTH &&
+		message->get_payload(message, EXTENSIBLE_AUTHENTICATION) == NULL)
+	{
+		this->policy = this->ike_sa->get_policy(this->ike_sa);
+		
+		if (this->policy && this->virtual_ip)
+		{
+			host_t *ip;
+			
+			DBG1(DBG_IKE, "peer requested virtual IP %H", this->virtual_ip);
+			ip = this->policy->get_virtual_ip(this->policy, this->virtual_ip);
+			if (ip == NULL || ip->is_anyaddr(ip))
+			{
+				DBG1(DBG_IKE, "not assigning a virtual IP to peer");
+				return SUCCESS;
+			}
+			DBG1(DBG_IKE, "assigning virtual IP %H to peer", ip);
+			this->ike_sa->set_virtual_ip(this->ike_sa, FALSE, ip);
+			
+			this->virtual_ip->destroy(this->virtual_ip);
+			this->virtual_ip = ip;
+			
+			/* DNS testing values
+			if (this->dns->remove_last(this->dns, (void**)&ip) == SUCCESS)
+			{
+				ip->destroy(ip);
+				ip = host_create_from_string("10.3.0.1", 0);
+				this->dns->insert_last(this->dns, ip);
+				ip = host_create_from_string("10.3.0.2", 0);
+				this->dns->insert_last(this->dns, ip);
+			} */
+			
+			build_payloads(this, message, CFG_REPLY);
+		}
+		return SUCCESS;
+	}
+	return NEED_MORE;
+}
+
+/**
+ * Implementation of task_t.process for initiator
+ */
+static status_t process_i(private_ike_config_t *this, message_t *message)
+{
+	if (message->get_exchange_type(message) == IKE_AUTH &&
+		!message->get_payload(message, EXTENSIBLE_AUTHENTICATION))
+	{
+		host_t *ip;
+		
+		DESTROY_IF(this->virtual_ip);
+		this->virtual_ip = NULL;
+
+		process_payloads(this, message);
+
+		if (this->virtual_ip)
+		{
+			this->ike_sa->set_virtual_ip(this->ike_sa, TRUE, this->virtual_ip);
+			
+			while (this->dns->remove_last(this->dns, (void**)&ip) == SUCCESS)
+			{
+				if (!ip->is_anyaddr(ip))
+				{
+					this->ike_sa->add_dns_server(this->ike_sa, ip);
+				}
+				ip->destroy(ip);
+			}
+		}
+		return SUCCESS;
+	}
+	return NEED_MORE;
+}
+
+/**
+ * Implementation of task_t.get_type
+ */
+static task_type_t get_type(private_ike_config_t *this)
+{
+	return IKE_CONFIG;
+}
+
+/**
+ * Implementation of task_t.migrate
+ */
+static void migrate(private_ike_config_t *this, ike_sa_t *ike_sa)
+{
+	DESTROY_IF(this->virtual_ip);
+	this->dns->destroy_offset(this->dns, offsetof(host_t, destroy));
+	
+	this->ike_sa = ike_sa;
+	this->virtual_ip = NULL;
+	this->dns = linked_list_create();
+}
+
+/**
+ * Implementation of task_t.destroy
+ */
+static void destroy(private_ike_config_t *this)
+{
+	DESTROY_IF(this->virtual_ip);
+	this->dns->destroy_offset(this->dns, offsetof(host_t, destroy));
+	free(this);
+}
+
+/*
+ * Described in header.
+ */
+ike_config_t *ike_config_create(ike_sa_t *ike_sa, policy_t *policy)
+{
+	private_ike_config_t *this = malloc_thing(private_ike_config_t);
+
+	this->public.task.get_type = (task_type_t(*)(task_t*))get_type;
+	this->public.task.migrate = (void(*)(task_t*,ike_sa_t*))migrate;
+	this->public.task.destroy = (void(*)(task_t*))destroy;
+	
+	if (policy)
+	{
+		this->public.task.build = (status_t(*)(task_t*,message_t*))build_i;
+		this->public.task.process = (status_t(*)(task_t*,message_t*))process_i;
+		this->initiator = TRUE;
+	}
+	else
+	{
+		this->public.task.build = (status_t(*)(task_t*,message_t*))build_r;
+		this->public.task.process = (status_t(*)(task_t*,message_t*))process_r;
+		this->initiator = FALSE;
+	}
+	
+	this->ike_sa = ike_sa;
+	this->policy = policy;
+	this->virtual_ip = NULL;
+	this->dns = linked_list_create();
+	
+	return &this->public;
+}