1 files changed, 231 insertions, 0 deletions
diff --git a/src/libcharon/plugins/stroke/stroke_handler.c b/src/libcharon/plugins/stroke/stroke_handler.c
new file mode 100644
index 000000000..523151efb
--- /dev/null
+++ b/src/libcharon/plugins/stroke/stroke_handler.c
@@ -0,0 +1,231 @@
+/*
+ * Copyright (C) 2012 Martin Willi
+ * Copyright (C) 2012 revosec AG
+ *
+ * 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 "stroke_handler.h"
+
+#include <daemon.h>
+#include <utils/linked_list.h>
+#include <threading/rwlock.h>
+
+typedef struct private_stroke_handler_t private_stroke_handler_t;
+
+/**
+ * Private data of an stroke_handler_t object.
+ */
+struct private_stroke_handler_t {
+
+	/**
+	 * Public stroke_handler_t interface.
+	 */
+	stroke_handler_t public;
+
+	/**
+	 * List of connection specific attributes, as attributes_t
+	 */
+	linked_list_t *attrs;
+
+	/**
+	 * rwlock to lock access to pools
+	 */
+	rwlock_t *lock;
+};
+
+/**
+ * Attributes assigned to a connection
+ */
+typedef struct {
+	/** name of the connection */
+	char *name;
+	/** list of DNS attributes, as host_t */
+	linked_list_t *dns;
+} attributes_t;
+
+/**
+ * Destroy an attributes_t entry
+ */
+static void attributes_destroy(attributes_t *this)
+{
+	this->dns->destroy_offset(this->dns, offsetof(host_t, destroy));
+	free(this->name);
+	free(this);
+}
+
+/**
+ * Filter function to convert host to DNS configuration attributes
+ */
+static bool attr_filter(void *lock, host_t **in,
+						configuration_attribute_type_t *type,
+						void *dummy, chunk_t *data)
+{
+	host_t *host = *in;
+
+	switch (host->get_family(host))
+	{
+		case AF_INET:
+			*type = INTERNAL_IP4_DNS;
+			break;
+		case AF_INET6:
+			*type = INTERNAL_IP6_DNS;
+			break;
+		default:
+			return FALSE;
+	}
+	if (host->is_anyaddr(host))
+	{
+		*data = chunk_empty;
+	}
+	else
+	{
+		*data = host->get_address(host);
+	}
+	return TRUE;
+}
+
+METHOD(attribute_handler_t, create_attribute_enumerator, enumerator_t*,
+	private_stroke_handler_t *this, identification_t *server,
+	linked_list_t *vips)
+{
+	ike_sa_t *ike_sa;
+	peer_cfg_t *peer_cfg;
+	enumerator_t *enumerator;
+	attributes_t *attr;
+
+	ike_sa = charon->bus->get_sa(charon->bus);
+	if (ike_sa)
+	{
+		peer_cfg = ike_sa->get_peer_cfg(ike_sa);
+		this->lock->read_lock(this->lock);
+		enumerator = this->attrs->create_enumerator(this->attrs);
+		while (enumerator->enumerate(enumerator, &attr))
+		{
+			if (streq(attr->name, peer_cfg->get_name(peer_cfg)))
+			{
+				enumerator->destroy(enumerator);
+				return enumerator_create_filter(
+									attr->dns->create_enumerator(attr->dns),
+									(void*)attr_filter, this->lock,
+									(void*)this->lock->unlock);
+			}
+		}
+		enumerator->destroy(enumerator);
+		this->lock->unlock(this->lock);
+	}
+	return enumerator_create_empty();
+}
+
+METHOD(stroke_handler_t, add_attributes, void,
+	private_stroke_handler_t *this, stroke_msg_t *msg)
+{
+	if (msg->add_conn.me.dns)
+	{
+		enumerator_t *enumerator;
+		attributes_t *attr = NULL;
+		host_t *host;
+		char *token;
+
+		enumerator = enumerator_create_token(msg->add_conn.me.dns, ",", " ");
+		while (enumerator->enumerate(enumerator, &token))
+		{
+			if (streq(token, "%config") || streq(token, "%config4"))
+			{
+				host = host_create_any(AF_INET);
+			}
+			else if (streq(token, "%config6"))
+			{
+				host = host_create_any(AF_INET6);
+			}
+			else
+			{
+				host = host_create_from_string(token, 0);
+			}
+			if (host)
+			{
+				if (!attr)
+				{
+					INIT(attr,
+						.name = strdup(msg->add_conn.name),
+						.dns = linked_list_create(),
+					);
+				}
+				attr->dns->insert_last(attr->dns, host);
+			}
+			else
+			{
+				DBG1(DBG_CFG, "ignoring invalid DNS address '%s'", token);
+			}
+		}
+		enumerator->destroy(enumerator);
+		if (attr)
+		{
+			this->lock->write_lock(this->lock);
+			this->attrs->insert_last(this->attrs, attr);
+			this->lock->unlock(this->lock);
+		}
+	}
+}
+
+METHOD(stroke_handler_t, del_attributes, void,
+	private_stroke_handler_t *this, stroke_msg_t *msg)
+{
+	enumerator_t *enumerator;
+	attributes_t *attr;
+
+	this->lock->write_lock(this->lock);
+	enumerator = this->attrs->create_enumerator(this->attrs);
+	while (enumerator->enumerate(enumerator, &attr))
+	{
+		if (streq(msg->del_conn.name, attr->name))
+		{
+			this->attrs->remove_at(this->attrs, enumerator);
+			attributes_destroy(attr);
+			break;
+		}
+	}
+	enumerator->destroy(enumerator);
+	this->lock->unlock(this->lock);
+}
+
+METHOD(stroke_handler_t, destroy, void,
+	private_stroke_handler_t *this)
+{
+	this->lock->destroy(this->lock);
+	this->attrs->destroy_function(this->attrs, (void*)attributes_destroy);
+	free(this);
+}
+
+/**
+ * See header
+ */
+stroke_handler_t *stroke_handler_create()
+{
+	private_stroke_handler_t *this;
+
+	INIT(this,
+		.public = {
+			.handler = {
+				.handle = (void*)return_false,
+				.release = (void*)return_false,
+				.create_attribute_enumerator = _create_attribute_enumerator,
+			},
+			.add_attributes = _add_attributes,
+			.del_attributes = _del_attributes,
+			.destroy = _destroy,
+		},
+		.attrs = linked_list_create(),
+		.lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
+	);
+
+	return &this->public;
+}