1 files changed, 404 insertions, 0 deletions
diff --git a/src/charon/config/connections/connection.c b/src/charon/config/connections/connection.c
new file mode 100644
index 000000000..ffe508992
--- /dev/null
+++ b/src/charon/config/connections/connection.c
@@ -0,0 +1,404 @@
+/**
+ * @file connection.c
+ *
+ * @brief Implementation of connection_t.
+ *
+ */
+
+/*
+ * Copyright (C) 2005-2006 Martin Willi
+ * Copyright (C) 2005 Jan Hutter
+ * 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 <string.h>
+
+#include <config/connections/connection.h>
+#include <utils/linked_list.h>
+
+ENUM(cert_policy_names, CERT_ALWAYS_SEND, CERT_NEVER_SEND,
+	"CERT_ALWAYS_SEND",
+	"CERT_SEND_IF_ASKED",
+	"CERT_NEVER_SEND"
+);
+
+typedef struct private_connection_t private_connection_t;
+
+/**
+ * Private data of an connection_t object
+ */
+struct private_connection_t {
+
+	/**
+	 * Public part
+	 */
+	connection_t public;
+	
+	/**
+	 * Number of references hold by others to this connection
+	 */
+	refcount_t refcount;
+
+	/**
+	 * Name of the connection
+	 */
+	char *name;
+	
+	/** 
+	 * Does charon handle this connection? Or can he ignore it?
+	 */
+	bool ikev2;
+	
+	/**
+	 * should we send a certificate request?
+	 */
+	cert_policy_t certreq_policy;
+	
+	/**
+	 * should we send a certificates?
+	 */
+	cert_policy_t cert_policy;
+	
+	/**
+	 * ID of us
+	 */
+	identification_t *my_id;
+
+	/**
+	 * Host information of my host.
+	 */
+	host_t *my_host;
+
+	/**
+	 * Host information of other host.
+	 */	
+	host_t *other_host;
+	
+	/**
+	 * Interval to send DPD liveness checks on inactivity
+	 */
+	u_int32_t dpd_delay;
+	
+	/**
+	 * Number of retransmission sequences to send bevore giving up
+	 */
+	u_int32_t keyingtries;
+	
+	/**
+	 * Supported proposals
+	 */
+	linked_list_t *proposals;
+	
+	/**
+	 * Time before an SA gets invalid
+	 */
+	u_int32_t soft_lifetime;
+	
+	/**
+	 * Time before an SA gets rekeyed
+	 */
+	u_int32_t hard_lifetime;
+	
+	/**
+	 * Use full reauthentication instead of rekeying
+	 */
+	bool reauth;
+	
+	/**
+	 * Time, which specifies the range of a random value
+	 * substracted from soft_lifetime.
+	 */
+	u_int32_t jitter;
+};
+
+/**
+ * Implementation of connection_t.get_name.
+ */
+static char *get_name (private_connection_t *this)
+{
+	return this->name;
+}
+
+/**
+ * Implementation of connection_t.is_ikev2.
+ */
+static bool is_ikev2 (private_connection_t *this)
+{
+	return this->ikev2;
+}
+
+/**
+ * Implementation of connection_t.get_certreq_policy.
+ */
+static cert_policy_t get_certreq_policy (private_connection_t *this)
+{
+	return this->certreq_policy;
+}
+
+/**
+ * Implementation of connection_t.get_cert_policy.
+ */
+static cert_policy_t get_cert_policy (private_connection_t *this)
+{
+	return this->cert_policy;
+}
+
+/**
+ * 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.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)
+{
+	iterator_t *iterator;
+	proposal_t *current;
+	linked_list_t *proposals = linked_list_create();
+	
+	iterator = this->proposals->create_iterator(this->proposals, TRUE);
+	while (iterator->iterate(iterator, (void**)&current))
+	{
+		current = current->clone(current);
+		proposals->insert_last(proposals, (void*)current);
+	}
+	iterator->destroy(iterator);
+	
+	return 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->iterate(stored_iter, (void**)&stored))
+	{
+		supplied_iter->reset(supplied_iter);
+		
+		while (supplied_iter->iterate(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.get_dpd_delay.
+ */
+static u_int32_t get_dpd_delay(private_connection_t *this)
+{
+	return this->dpd_delay;
+}
+
+/**
+ * Implementation of connection_t.get_keyingtries.
+ */
+static u_int32_t get_keyingtries(private_connection_t *this)
+{
+	return this->keyingtries;
+}
+
+/**
+ * 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;
+	diffie_hellman_group_t dh_group = MODP_NONE;
+	
+	iterator = this->proposals->create_iterator(this->proposals, TRUE);
+	while (iterator->iterate(iterator, (void**)&proposal))
+	{
+		if (proposal->get_algorithm(proposal, DIFFIE_HELLMAN_GROUP, &algo))
+		{
+			dh_group = algo->algorithm;
+			break;
+		}
+	}
+	iterator->destroy(iterator);
+	return dh_group;
+}
+
+/**
+ * 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->iterate(prop_iter, (void**)&proposal))
+	{
+		alg_iter = proposal->create_algorithm_iterator(proposal, DIFFIE_HELLMAN_GROUP);
+		while (alg_iter->iterate(alg_iter, (void**)&algo))
+		{
+			if (algo->algorithm == dh_group)
+			{
+				prop_iter->destroy(prop_iter);
+				alg_iter->destroy(alg_iter);
+				return TRUE;
+			}
+		}
+		alg_iter->destroy(alg_iter);
+	}
+	prop_iter->destroy(prop_iter);
+	return FALSE;
+}
+/**
+ * Implementation of connection_t.get_soft_lifetime
+ */
+static u_int32_t get_soft_lifetime(private_connection_t *this)
+{
+	if (this->jitter == 0)
+	{
+		return this->soft_lifetime ;
+	}
+	return this->soft_lifetime - (random() % this->jitter);
+}
+
+/**
+ * Implementation of connection_t.get_hard_lifetime.
+ */
+static u_int32_t get_hard_lifetime(private_connection_t *this)
+{
+	return this->hard_lifetime;
+}
+
+/**
+ * Implementation of connection_t.get_reauth.
+ */
+static bool get_reauth(private_connection_t *this)
+{
+	return this->reauth;
+}
+
+/**
+ * Implementation of connection_t.get_ref.
+ */
+static void get_ref(private_connection_t *this)
+{
+	ref_get(&this->refcount);
+}
+
+/**
+ * Implementation of connection_t.destroy.
+ */
+static void destroy(private_connection_t *this)
+{
+	if (ref_put(&this->refcount))
+	{
+		this->proposals->destroy_offset(this->proposals, offsetof(proposal_t, destroy));
+		this->my_host->destroy(this->my_host);
+		this->other_host->destroy(this->other_host);
+		free(this->name);
+		free(this);
+	}
+}
+
+/**
+ * Described in header.
+ */
+connection_t * connection_create(char *name, bool ikev2,
+								 cert_policy_t cert_policy,
+								 cert_policy_t certreq_policy,
+								 host_t *my_host, host_t *other_host,
+								 u_int32_t dpd_delay, bool reauth,
+								 u_int32_t keyingtries,
+								 u_int32_t hard_lifetime,
+								 u_int32_t soft_lifetime, u_int32_t jitter)
+{
+	private_connection_t *this = malloc_thing(private_connection_t);
+	
+	/* public functions */
+	this->public.get_name = (char*(*)(connection_t*))get_name;
+	this->public.is_ikev2 = (bool(*)(connection_t*))is_ikev2;
+	this->public.get_cert_policy = (cert_policy_t(*)(connection_t*))get_cert_policy;
+	this->public.get_certreq_policy = (cert_policy_t(*)(connection_t*))get_certreq_policy;
+	this->public.get_my_host = (host_t*(*)(connection_t*))get_my_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_dpd_delay = (u_int32_t(*)(connection_t*)) get_dpd_delay;
+	this->public.get_reauth = (bool(*)(connection_t*)) get_reauth;
+	this->public.get_keyingtries = (u_int32_t(*)(connection_t*)) get_keyingtries;
+	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.get_soft_lifetime = (u_int32_t (*) (connection_t *))get_soft_lifetime;
+	this->public.get_hard_lifetime = (u_int32_t (*) (connection_t *))get_hard_lifetime;
+	this->public.get_ref = (void(*)(connection_t*))get_ref;
+	this->public.destroy = (void(*)(connection_t*))destroy;
+	
+	/* private variables */
+	this->refcount = 1;
+	this->name = strdup(name);
+	this->ikev2 = ikev2;
+	this->cert_policy = cert_policy;
+	this->certreq_policy = certreq_policy;
+	this->my_host = my_host;
+	this->other_host = other_host;
+	this->dpd_delay = dpd_delay;
+	this->reauth = reauth;
+	this->keyingtries = keyingtries;
+	this->hard_lifetime = hard_lifetime;
+	this->soft_lifetime = soft_lifetime;
+	this->jitter = jitter;
+	
+	this->proposals = linked_list_create();
+	
+	return &this->public;
+}