1 files changed, 328 insertions, 0 deletions
diff --git a/Source/charon/config/connections/connection.c b/Source/charon/config/connections/connection.c
new file mode 100644
index 000000000..d2e50c780
--- /dev/null
+++ b/Source/charon/config/connections/connection.c
@@ -0,0 +1,328 @@
+/**
+ * @file connection.c
+ * 
+ * @brief Implementation of connection_t.
+ *  
+ */
+
+/*
+ * Copyright (C) 2005 Jan Hutter, 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 "connection.h"
+
+#include <utils/linked_list.h>
+#include <utils/logger.h>
+
+/** 
+ * String mappings for auth_method_t.
+ */
+mapping_t auth_method_m[] = {
+	{RSA_DIGITAL_SIGNATURE, "RSA"},
+	{SHARED_KEY_MESSAGE_INTEGRITY_CODE, "SHARED_KEY"},
+	{DSS_DIGITAL_SIGNATURE, "DSS"},
+	{MAPPING_END, NULL}
+};
+
+
+typedef struct private_connection_t private_connection_t;
+
+/**
+ * Private data of an connection_t object
+ */
+struct private_connection_t {
+
+	/**
+	 * Public part
+	 */
+	connection_t public;
+
+	/**
+	 * ID of us
+	 */
+	identification_t *my_id;
+
+	/**
+	 * ID of remote peer
+	 */	
+	identification_t *other_id;
+
+	/**
+	 * Host information of my host.
+	 */
+	host_t *my_host;
+
+	/**
+	 * Host information of other host.
+	 */	
+	host_t *other_host;
+	
+	/**
+	 * Method to use for own authentication data
+	 */
+	auth_method_t auth_method;
+	
+	/**
+	 * Supported proposals
+	 */
+	linked_list_t *proposals;
+};
+
+/**
+ * Implementation of connection_t.get_my_id.
+ */
+static identification_t *get_my_id (private_connection_t *this)
+{
+	return this->my_id;
+}
+
+/**
+ * Implementation of connection_t.get_other_id.
+ */
+static identification_t *get_other_id(private_connection_t *this)
+{
+	return this->other_id;
+}
+
+/**
+ * Implementation of connection_t.get_my_host.
+ */
+static host_t * get_my_host (private_connection_t *this)
+{
+	return this->my_host;
+}
+
+/**
+ * Implementation of connection_t.update_my_host.
+ */
+static void update_my_host(private_connection_t *this, host_t *my_host)
+{
+	this->my_host->destroy(this->my_host);
+	this->my_host = my_host;
+}
+
+/**
+ * Implementation of connection_t.update_other_host.
+ */
+static void update_other_host(private_connection_t *this, host_t *other_host)
+{
+	this->other_host->destroy(this->other_host);
+	this->other_host = other_host;
+}
+
+/**
+ * Implementation of connection_t.get_other_host.
+ */
+static host_t * get_other_host (private_connection_t *this)
+{
+	return this->other_host;
+}
+
+/**
+ * Implementation of connection_t.get_proposals.
+ */
+static linked_list_t* get_proposals (private_connection_t *this)
+{
+	return this->proposals;
+}
+	
+/**
+ * Implementation of connection_t.select_proposal.
+ */
+static proposal_t *select_proposal(private_connection_t *this, linked_list_t *proposals)
+{
+	iterator_t *stored_iter, *supplied_iter;
+	proposal_t *stored, *supplied, *selected;
+	
+	stored_iter = this->proposals->create_iterator(this->proposals, TRUE);
+	supplied_iter = proposals->create_iterator(proposals, TRUE);
+	
+	/* compare all stored proposals with all supplied. Stored ones are preferred. */
+	while (stored_iter->has_next(stored_iter))
+	{
+		supplied_iter->reset(supplied_iter);
+		stored_iter->current(stored_iter, (void**)&stored);
+
+		while (supplied_iter->has_next(supplied_iter))
+		{
+			supplied_iter->current(supplied_iter, (void**)&supplied);
+			selected = stored->select(stored, supplied);
+			if (selected)
+			{
+				/* they match, return */
+				stored_iter->destroy(stored_iter);
+				supplied_iter->destroy(supplied_iter);
+				return selected;
+			}
+		}
+	}
+	
+	/* no proposal match :-(, will result in a NO_PROPOSAL_CHOSEN... */
+	stored_iter->destroy(stored_iter);
+	supplied_iter->destroy(supplied_iter);
+	
+	return NULL;
+}
+
+/**
+ * Implementation of connection_t.add_proposal.
+ */
+static void add_proposal (private_connection_t *this, proposal_t *proposal)
+{
+	this->proposals->insert_last(this->proposals, proposal);
+}
+
+/**
+ * Implementation of connection_t.auth_method_t.
+ */
+static auth_method_t get_auth_method(private_connection_t *this)
+{
+	return this->auth_method;
+}
+
+/**
+ * Implementation of connection_t.get_dh_group.
+ */
+static diffie_hellman_group_t get_dh_group(private_connection_t *this)
+{
+	iterator_t *iterator;
+	proposal_t *proposal;
+	algorithm_t *algo;
+	
+	iterator = this->proposals->create_iterator(this->proposals, TRUE);
+	while (iterator->has_next(iterator))
+	{
+		iterator->current(iterator, (void**)&proposal);
+		proposal->get_algorithm(proposal, PROTO_IKE, DIFFIE_HELLMAN_GROUP, &algo);
+		if (algo)
+		{
+			iterator->destroy(iterator);
+			return algo->algorithm;
+		}
+	}
+	iterator->destroy(iterator);
+	return MODP_UNDEFINED;
+}
+
+/**
+ * Implementation of connection_t.check_dh_group.
+ */
+static bool check_dh_group(private_connection_t *this, diffie_hellman_group_t dh_group)
+{
+	iterator_t *prop_iter, *alg_iter;
+	proposal_t *proposal;
+	algorithm_t *algo;
+	
+	prop_iter = this->proposals->create_iterator(this->proposals, TRUE);
+	while (prop_iter->has_next(prop_iter))
+	{
+		prop_iter->current(prop_iter, (void**)&proposal);
+		alg_iter = proposal->create_algorithm_iterator(proposal, PROTO_IKE, DIFFIE_HELLMAN_GROUP);
+		while (alg_iter->has_next(alg_iter))
+		{
+			alg_iter->current(alg_iter, (void**)&algo);
+			if (algo->algorithm == dh_group)
+			{
+				prop_iter->destroy(prop_iter);
+				alg_iter->destroy(alg_iter);
+				return TRUE;
+			}
+		}
+	}
+	prop_iter->destroy(prop_iter);
+	alg_iter->destroy(alg_iter);
+	return FALSE;
+}
+
+/**
+ * Implementation of connection_t.clone.
+ */
+static connection_t *clone(private_connection_t *this)
+{
+	iterator_t *iterator;
+	proposal_t *proposal;
+	private_connection_t *clone = (private_connection_t*)connection_create(
+			this->my_host->clone(this->my_host),
+			this->other_host->clone(this->other_host),
+			this->my_id->clone(this->my_id),
+			this->other_id->clone(this->other_id),
+			this->auth_method);
+	
+	/* clone all proposals */
+	iterator = this->proposals->create_iterator(this->proposals, TRUE);
+	while (iterator->has_next(iterator))
+	{
+		iterator->current(iterator, (void**)&proposal);
+		proposal = proposal->clone(proposal);
+		clone->proposals->insert_last(clone->proposals, (void*)proposal);
+	}
+	iterator->destroy(iterator);
+	
+	return &clone->public;
+}
+
+/**
+ * Implementation of connection_t.destroy.
+ */
+static void destroy (private_connection_t *this)
+{
+	proposal_t *proposal;
+	
+	while (this->proposals->remove_last(this->proposals, (void**)&proposal) == SUCCESS)
+	{
+		proposal->destroy(proposal);
+	}
+	this->proposals->destroy(this->proposals);
+	
+	this->my_host->destroy(this->my_host);
+	this->other_host->destroy(this->other_host);
+	this->my_id->destroy(this->my_id);
+	this->other_id->destroy(this->other_id);
+	free(this);
+}
+
+/**
+ * Described in header.
+ */
+connection_t * connection_create(host_t *my_host, host_t *other_host, identification_t *my_id, identification_t *other_id, auth_method_t auth_method)
+{
+	private_connection_t *this = malloc_thing(private_connection_t);
+
+	/* public functions */
+	this->public.get_my_id = (identification_t*(*)(connection_t*))get_my_id;
+	this->public.get_other_id = (identification_t*(*)(connection_t*))get_other_id;
+	this->public.get_my_host = (host_t*(*)(connection_t*))get_my_host;
+	this->public.update_my_host = (void(*)(connection_t*,host_t*))update_my_host;
+	this->public.update_other_host = (void(*)(connection_t*,host_t*))update_other_host;
+	this->public.get_other_host = (host_t*(*)(connection_t*))get_other_host;
+	this->public.get_proposals = (linked_list_t*(*)(connection_t*))get_proposals;
+	this->public.select_proposal = (proposal_t*(*)(connection_t*,linked_list_t*))select_proposal;
+	this->public.add_proposal = (void(*)(connection_t*, proposal_t*)) add_proposal;
+	this->public.get_auth_method = (auth_method_t(*)(connection_t*)) get_auth_method;
+	this->public.get_dh_group = (diffie_hellman_group_t(*)(connection_t*)) get_dh_group;
+	this->public.check_dh_group = (bool(*)(connection_t*,diffie_hellman_group_t)) check_dh_group;
+	this->public.clone = (connection_t*(*)(connection_t*))clone;
+	this->public.destroy = (void(*)(connection_t*))destroy;
+	
+	/* private variables */
+	this->my_host = my_host;
+	this->other_host = other_host;
+	this->my_id = my_id;
+	this->other_id = other_id;
+	this->auth_method = auth_method;
+		
+	this->proposals = linked_list_create();
+
+	return (&this->public);
+}