attribute_manager supports attribute_handler's to handle configuration attributes via plugins

moved resolv.conf editing to a separate plugin (resolv_conf) extended attribute_provider interface to hand out arbitrary attributes moved strongswan.conf based dns/nbns configuration to a plugin (attr)
2009-04-24 14:13:52 +00:00
parent da17b0169a
commit 7f56b49461
20 changed files with 1099 additions and 381 deletions
@@ -0,0 +1,156 @@
+/*
+ * Copyright (C) 2009 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.
+ *
+ * $Id$
+ */
+
+#include "attr_provider.h"
+
+#include <time.h>
+
+#include <daemon.h>
+
+#define SERVER_MAX		2
+
+typedef struct private_attr_provider_t private_attr_provider_t;
+typedef struct attribute_entry_t attribute_entry_t;
+
+/**
+ * private data of attr_provider
+ */
+struct private_attr_provider_t {
+	
+	/**
+	 * public functions
+	 */
+	attr_provider_t public;
+	
+	/**
+	 * List of attributes, attribute_entry_t
+	 */
+	linked_list_t *attributes;
+};
+
+struct attribute_entry_t {
+	/** type of attribute */
+	configuration_attribute_type_t type;
+	/** attribute value */
+	chunk_t value;
+};
+
+/**
+ * convert enumerator value from attribute_entry
+ */
+static bool attr_enum_filter(void *null, attribute_entry_t **in,
+			configuration_attribute_type_t *type, void* none, chunk_t *value)
+{
+	*type = (*in)->type;
+	*value = (*in)->value;
+	return TRUE;
+}
+
+/**
+ * Implementation of attribute_provider_t.create_attribute_enumerator
+ */
+static enumerator_t* create_attribute_enumerator(
+					private_attr_provider_t *this, identification_t *id)
+{
+	return enumerator_create_filter(
+						this->attributes->create_enumerator(this->attributes),
+						(void*)attr_enum_filter, NULL, NULL);
+}
+
+/**
+ * Implementation of attr_provider_t.destroy
+ */
+static void destroy(private_attr_provider_t *this)
+{
+	attribute_entry_t *entry;
+	
+	while (this->attributes->remove_last(this->attributes,
+										 (void**)&entry) == SUCCESS)
+	{
+		free(entry->value.ptr);
+		free(entry);
+	}
+	this->attributes->destroy(this->attributes);
+	free(this);
+}
+
+/**
+ * Add an attribute entry to the list
+ */
+static void add_entry(private_attr_provider_t *this, char *key, int nr,
+					  configuration_attribute_type_t type)
+{
+	attribute_entry_t *entry;
+	host_t *host;
+	char *str;
+	
+	str = lib->settings->get_str(lib->settings, "charon.%s%d", NULL, key, nr);
+	if (str)
+	{
+		host = host_create_from_string(str, 0);
+		if (host)
+		{
+			entry = malloc_thing(attribute_entry_t);
+			
+			if (host->get_family(host) == AF_INET6)
+			{
+				switch (type)
+				{
+					case INTERNAL_IP4_DNS:
+						type = INTERNAL_IP6_DNS;
+						break;
+					case INTERNAL_IP4_NBNS:
+						type = INTERNAL_IP6_NBNS;
+						break;
+					default:
+						break;
+				}
+			}
+			entry->type = type;
+			entry->value = chunk_clone(host->get_address(host));
+			host->destroy(host);
+			this->attributes->insert_last(this->attributes, entry);
+		}
+	}
+}
+
+/*
+ * see header file
+ */
+attr_provider_t *attr_provider_create(database_t *db)
+{
+	private_attr_provider_t *this;
+	int i;
+	
+	this = malloc_thing(private_attr_provider_t);
+	
+	this->public.provider.acquire_address = (host_t*(*)(attribute_provider_t *this, char*, identification_t *, host_t *))return_null;
+	this->public.provider.release_address = (bool(*)(attribute_provider_t *this, char*,host_t *, identification_t*))return_false;
+	this->public.provider.create_attribute_enumerator = (enumerator_t*(*)(attribute_provider_t*, identification_t *id))create_attribute_enumerator;
+	this->public.destroy = (void(*)(attr_provider_t*))destroy;
+	
+	this->attributes = linked_list_create();
+	
+	for (i = 1; i <= SERVER_MAX; i++)
+	{
+		add_entry(this, "dns", i, INTERNAL_IP4_DNS);
+		add_entry(this, "nbns", i, INTERNAL_IP4_NBNS);
+	}
+	
+	return &this->public;
+}
+