1 files changed, 231 insertions, 0 deletions
diff --git a/src/charon/config/backends/local_backend.c b/src/charon/config/backends/local_backend.c
new file mode 100644
index 000000000..534c71c97
--- /dev/null
+++ b/src/charon/config/backends/local_backend.c
@@ -0,0 +1,231 @@
+/**
+ * @file local_backend.c
+ *
+ * @brief Implementation of local_backend_t.
+ *
+ */
+
+/*
+ * 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 <string.h>
+
+#include "local_backend.h"
+
+#include <daemon.h>
+#include <utils/linked_list.h>
+
+
+typedef struct private_local_backend_t private_local_backend_t;
+
+/**
+ * Private data of an local_backend_t object
+ */
+struct private_local_backend_t {
+
+	/**
+	 * Public part
+	 */
+	local_backend_t public;
+	
+	/**
+	 * list of configs
+	 */
+	linked_list_t *cfgs;
+	
+	/**
+	 * Mutex to exclusivly access list
+	 */
+	pthread_mutex_t mutex;
+};
+
+/**
+ * implements cfg_store_t.get_ike_cfg.
+ */
+static ike_cfg_t *get_ike_cfg(private_local_backend_t *this, 
+							  host_t *my_host, host_t *other_host)
+{
+	peer_cfg_t *peer;
+	ike_cfg_t *current, *found = NULL;
+	iterator_t *iterator;
+	host_t *my_candidate, *other_candidate;
+	enum {
+		MATCH_NONE  = 0x00,
+		MATCH_ANY   = 0x01,
+		MATCH_ME    = 0x04,
+		MATCH_OTHER = 0x08,
+	} prio, best = MATCH_ANY;
+	
+	DBG2(DBG_CFG, "looking for a config for %H...%H",
+		 my_host, other_host);
+	
+	iterator = this->cfgs->create_iterator_locked(this->cfgs, &this->mutex);
+	while (iterator->iterate(iterator, (void**)&peer))
+	{
+		prio = MATCH_NONE;
+		current = peer->get_ike_cfg(peer);
+		my_candidate = current->get_my_host(current);
+		other_candidate = current->get_other_host(current);
+		
+		if (my_candidate->ip_equals(my_candidate, my_host))
+		{
+			prio += MATCH_ME;
+		}
+		else if (my_candidate->is_anyaddr(my_candidate))
+		{
+			prio += MATCH_ANY;
+		}
+		
+		if (other_candidate->ip_equals(other_candidate, other_host))
+		{
+			prio += MATCH_OTHER;
+		}
+		else if (other_candidate->is_anyaddr(other_candidate))
+		{
+			prio += MATCH_ANY;
+		}
+		
+		DBG2(DBG_CFG, "  candidate '%s': %H...%H, prio %d",
+			 peer->get_name(peer), my_candidate, other_candidate, prio);
+		
+		/* we require at least two MATCH_ANY */
+		if (prio > best)
+		{
+			best = prio;
+			found = current;
+		}
+	}
+	if (found)
+	{
+		found->get_ref(found);
+	}
+	iterator->destroy(iterator);
+	return found;
+}
+
+/**
+ * implements cfg_store_t.get_peer.
+ */			
+static peer_cfg_t *get_peer_cfg(private_local_backend_t *this, 
+								   identification_t *my_id,
+								   identification_t *other_id)
+{
+	peer_cfg_t *current, *found = NULL;
+	iterator_t *iterator;
+	identification_t *my_candidate, *other_candidate;
+	int wc1, wc2, total, best = MAX_WILDCARDS;
+	
+	DBG2(DBG_CFG, "looking for a config for %D...%D", my_id, other_id);
+	
+	iterator = this->cfgs->create_iterator_locked(this->cfgs, &this->mutex);
+	while (iterator->iterate(iterator, (void**)&current))
+	{
+		my_candidate = current->get_my_id(current);
+		other_candidate = current->get_other_id(current);
+		
+		if (my_candidate->matches(my_candidate, my_id, &wc1) &&
+			other_id->matches(other_id, other_candidate, &wc2))
+		{
+			total = wc1 + wc2;
+			
+			DBG2(DBG_CFG, "  candidate '%s': %D...%D, wildcards %d",
+				 current->get_name(current), my_candidate, other_candidate,
+				 total);
+			
+			if (total < best)
+			{
+				found = current;
+				best = total;
+			}
+		}
+	}
+	if (found)
+	{
+		found->get_ref(found);
+	}
+	iterator->destroy(iterator);
+	return found;
+}
+
+/**
+ * implements cfg_store_t.get_peer_by_name.
+ */					
+static peer_cfg_t *get_peer_cfg_by_name(private_local_backend_t *this,
+										char *name)
+{
+	iterator_t *iterator;
+	peer_cfg_t *current, *found = NULL;
+	
+	iterator = this->cfgs->create_iterator(this->cfgs, TRUE);
+	while (iterator->iterate(iterator, (void**)&current))
+	{
+		if (streq(current->get_name(current), name))
+		{
+			found = current;
+			found->get_ref(found);
+			break;
+		}
+	}
+	iterator->destroy(iterator);
+	return found;
+}
+
+/**
+ * Implementation of local_backend_t.create_peer_cfg_iterator.
+ */
+static iterator_t* create_peer_cfg_iterator(private_local_backend_t *this)
+{
+	return this->cfgs->create_iterator_locked(this->cfgs, &this->mutex);
+}
+
+/**
+ * Implementation of local_backend_t.add_peer_cfg.
+ */
+static void add_peer_cfg(private_local_backend_t *this, peer_cfg_t *config)
+{
+    pthread_mutex_lock(&this->mutex);
+    this->cfgs->insert_last(this->cfgs, config);
+    pthread_mutex_unlock(&this->mutex);
+}
+
+/**
+ * Implementation of local_backend_t.destroy.
+ */
+static void destroy(private_local_backend_t *this)
+{
+    this->cfgs->destroy_offset(this->cfgs, offsetof(peer_cfg_t, destroy));
+    free(this);
+}
+
+/**
+ * Described in header.
+ */
+local_backend_t *local_backend_create(void)
+{
+	private_local_backend_t *this = malloc_thing(private_local_backend_t);
+	
+	this->public.backend.get_ike_cfg = (ike_cfg_t*(*)(backend_t*, host_t *, host_t *))get_ike_cfg;
+	this->public.backend.get_peer_cfg = (peer_cfg_t*(*)(backend_t*, identification_t *, identification_t *))get_peer_cfg;
+	this->public.backend.get_peer_cfg_by_name = (peer_cfg_t*(*)(backend_t*, char *))get_peer_cfg_by_name;
+    this->public.create_peer_cfg_iterator = (iterator_t*(*)(local_backend_t*))create_peer_cfg_iterator;
+    this->public.add_peer_cfg = (void(*)(local_backend_t*, peer_cfg_t *))add_peer_cfg;
+    this->public.destroy = (void(*)(local_backend_t*))destroy;
+    
+	/* private variables */
+	this->cfgs = linked_list_create();
+	pthread_mutex_init(&this->mutex, NULL);
+	
+	return (&this->public);
+}