Imported Upstream version 5.3.0

1 files changed, 329 insertions, 0 deletions

diff --git a/src/libcharon/plugins/attr/attr_provider.c b/src/libcharon/plugins/attr/attr_provider.c
new file mode 100644
index 000000000..cac0ae4bf
--- /dev/null
+++ b/src/libcharon/plugins/attr/attr_provider.c
@@ -0,0 +1,329 @@
+/*
+ * Copyright (C) 2010 Tobias Brunner
+ * 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.
+ */
+
+#include "attr_provider.h"
+
+#include <time.h>
+
+#include <daemon.h>
+#include <utils/debug.h>
+#include <collections/linked_list.h>
+#include <threading/rwlock.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;
+
+	/**
+	 * Lock for attribute list
+	 */
+	rwlock_t *lock;
+};
+
+struct attribute_entry_t {
+	/** type of attribute */
+	configuration_attribute_type_t type;
+	/** attribute value */
+	chunk_t value;
+};
+
+/**
+ * Destroy an entry
+ */
+static void attribute_destroy(attribute_entry_t *this)
+{
+	free(this->value.ptr);
+	free(this);
+}
+
+/**
+ * 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;
+}
+
+METHOD(attribute_provider_t, create_attribute_enumerator, enumerator_t*,
+	private_attr_provider_t *this, linked_list_t *pools,
+	ike_sa_t *ike_sa, linked_list_t *vips)
+{
+	if (vips->get_count(vips))
+	{
+		this->lock->read_lock(this->lock);
+		return enumerator_create_filter(
+				this->attributes->create_enumerator(this->attributes),
+				(void*)attr_enum_filter, this->lock, (void*)this->lock->unlock);
+	}
+	return enumerator_create_empty();
+}
+
+METHOD(attr_provider_t, destroy, void,
+	private_attr_provider_t *this)
+{
+	this->attributes->destroy_function(this->attributes,
+									   (void*)attribute_destroy);
+	this->lock->destroy(this->lock);
+	free(this);
+}
+
+/**
+ * Add an attribute entry to the list
+ */
+static void add_legacy_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, "%s.%s%d", NULL, lib->ns,
+								 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);
+			DBG2(DBG_CFG, "loaded legacy entry attribute %N: %#B",
+				 configuration_attribute_type_names, entry->type, &entry->value);
+			this->attributes->insert_last(this->attributes, entry);
+		}
+	}
+}
+
+/**
+ * Key to attribute type mappings, for v4 and v6 attributes
+ */
+typedef struct {
+	char *name;
+	configuration_attribute_type_t v4;
+	configuration_attribute_type_t v6;
+} attribute_type_key_t;
+
+static attribute_type_key_t keys[] = {
+	{"address",			INTERNAL_IP4_ADDRESS,	INTERNAL_IP6_ADDRESS},
+	{"dns",				INTERNAL_IP4_DNS,		INTERNAL_IP6_DNS},
+	{"nbns",			INTERNAL_IP4_NBNS,		INTERNAL_IP6_NBNS},
+	{"dhcp",			INTERNAL_IP4_DHCP,		INTERNAL_IP6_DHCP},
+	{"netmask",			INTERNAL_IP4_NETMASK,	INTERNAL_IP6_NETMASK},
+	{"server",			INTERNAL_IP4_SERVER,	INTERNAL_IP6_SERVER},
+	{"subnet",			INTERNAL_IP4_SUBNET,	INTERNAL_IP6_SUBNET},
+	{"split-include",	UNITY_SPLIT_INCLUDE,	UNITY_SPLIT_INCLUDE},
+	{"split-exclude",	UNITY_LOCAL_LAN,		UNITY_LOCAL_LAN},
+};
+
+/**
+ * Load (numerical) entries from the plugins.attr namespace
+ */
+static void load_entries(private_attr_provider_t *this)
+{
+	enumerator_t *enumerator, *tokens;
+	char *key, *value, *token;
+	int i;
+
+	for (i = 1; i <= SERVER_MAX; i++)
+	{
+		add_legacy_entry(this, "dns", i, INTERNAL_IP4_DNS);
+		add_legacy_entry(this, "nbns", i, INTERNAL_IP4_NBNS);
+	}
+
+	enumerator = lib->settings->create_key_value_enumerator(lib->settings,
+													"%s.plugins.attr", lib->ns);
+	while (enumerator->enumerate(enumerator, &key, &value))
+	{
+		configuration_attribute_type_t type;
+		attribute_type_key_t *mapped = NULL;
+		attribute_entry_t *entry;
+		chunk_t data;
+		host_t *host;
+		char *pos;
+		int i, mask = -1, family;
+
+		if (streq(key, "load"))
+		{
+			continue;
+		}
+		type = atoi(key);
+		if (!type)
+		{
+			for (i = 0; i < countof(keys); i++)
+			{
+				if (streq(key, keys[i].name))
+				{
+					mapped = &keys[i];
+					break;
+				}
+			}
+			if (!mapped)
+			{
+				DBG1(DBG_CFG, "mapping attribute type %s failed", key);
+				continue;
+			}
+		}
+		tokens = enumerator_create_token(value, ",", " ");
+		while (tokens->enumerate(tokens, &token))
+		{
+			pos = strchr(token, '/');
+			if (pos)
+			{
+				*(pos++) = '\0';
+				mask = atoi(pos);
+			}
+			host = host_create_from_string(token, 0);
+			if (!host)
+			{
+				if (mapped)
+				{
+					DBG1(DBG_CFG, "invalid host in key %s: %s", key, token);
+					continue;
+				}
+				/* store numeric attributes that are no IP addresses as strings */
+				data = chunk_clone(chunk_from_str(token));
+			}
+			else
+			{
+				family = host->get_family(host);
+				if (mask == -1)
+				{
+					data = chunk_clone(host->get_address(host));
+				}
+				else
+				{
+					if (family == AF_INET)
+					{	/* IPv4 attributes contain a subnet mask */
+						u_int32_t netmask = 0;
+
+						if (mask)
+						{	/* shifting u_int32_t by 32 or more is undefined */
+							mask = 32 - mask;
+							netmask = htonl((0xFFFFFFFF >> mask) << mask);
+						}
+						data = chunk_cat("cc", host->get_address(host),
+										 chunk_from_thing(netmask));
+					}
+					else
+					{	/* IPv6 addresses the prefix only */
+						data = chunk_cat("cc", host->get_address(host),
+										 chunk_from_chars(mask));
+					}
+				}
+				host->destroy(host);
+				if (mapped)
+				{
+					switch (family)
+					{
+						case AF_INET:
+							type = mapped->v4;
+							break;
+						case AF_INET6:
+							type = mapped->v6;
+							break;
+					}
+				}
+			}
+			INIT(entry,
+				.type = type,
+				.value = data,
+			);
+			DBG2(DBG_CFG, "loaded attribute %N: %#B",
+				 configuration_attribute_type_names, entry->type, &entry->value);
+			this->attributes->insert_last(this->attributes, entry);
+		}
+		tokens->destroy(tokens);
+	}
+	enumerator->destroy(enumerator);
+}
+
+METHOD(attr_provider_t, reload, void,
+	private_attr_provider_t *this)
+{
+	this->lock->write_lock(this->lock);
+
+	this->attributes->destroy_function(this->attributes, (void*)attribute_destroy);
+	this->attributes = linked_list_create();
+
+	load_entries(this);
+
+	DBG1(DBG_CFG, "loaded %d entr%s for attr plugin configuration",
+		 this->attributes->get_count(this->attributes),
+		 this->attributes->get_count(this->attributes) == 1 ? "y" : "ies");
+
+	this->lock->unlock(this->lock);
+}
+
+/*
+ * see header file
+ */
+attr_provider_t *attr_provider_create(database_t *db)
+{
+	private_attr_provider_t *this;
+
+	INIT(this,
+		.public = {
+			.provider = {
+				.acquire_address = (void*)return_null,
+				.release_address = (void*)return_false,
+				.create_attribute_enumerator = _create_attribute_enumerator,
+			},
+			.reload = _reload,
+			.destroy = _destroy,
+		},
+		.attributes = linked_list_create(),
+		.lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
+	);
+
+	load_entries(this);
+
+	return &this->public;
+}