xpc: add support for logging over XPC channels

src/frontends/osx/charon-xpc/xpc_channels.c

@@ -14,6 +14,7 @@
  */
 
 #include "xpc_channels.h"
+#include "xpc_logger.h"
 
 #include <credentials/sets/callback_cred.h>
 #include <collections/hashtable.h>
@@ -58,6 +59,8 @@ typedef struct {
 	uintptr_t sa;
 	/* did we already ask for a password? */
 	bool passworded;
+	/* channel specific logger */
+	xpc_logger_t *logger;
 } entry_t;
 
 /**
@@ -65,6 +68,8 @@ typedef struct {
  */
 static void destroy_entry(entry_t *entry)
 {
+	charon->bus->remove_logger(charon->bus, &entry->logger->logger);
+	entry->logger->destroy(entry->logger);
 	xpc_connection_suspend(entry->conn);
 	xpc_connection_cancel(entry->conn);
 	xpc_release(entry->conn);
@@ -110,6 +115,7 @@ METHOD(xpc_channels_t, add, void,
 	INIT(entry,
 		.conn = conn,
 		.sa = ike_sa,
+		.logger = xpc_logger_create(conn),
 	);
 
 	xpc_connection_set_event_handler(entry->conn, ^(xpc_object_t event) {
@@ -117,7 +123,7 @@ METHOD(xpc_channels_t, add, void,
 		if (event == XPC_ERROR_CONNECTION_INVALID ||
 			event == XPC_ERROR_CONNECTION_INTERRUPTED)
 		{
-			remove_conn(this, entry->conn);
+			remove_conn(this, conn);
 		}
 		else
 		{
@@ -125,6 +131,9 @@ METHOD(xpc_channels_t, add, void,
 		}
 	});
 
+	entry->logger->set_ike_sa(entry->logger, entry->sa);
+	charon->bus->add_logger(charon->bus, &entry->logger->logger);
+
 	this->lock->write_lock(this->lock);
 	this->channels->put(this->channels, (void*)entry->sa, entry);
 	this->lock->unlock(this->lock);
@@ -144,6 +153,7 @@ METHOD(listener_t, ike_rekey, bool,
 	if (entry)
 	{
 		entry->sa = new->get_unique_id(new);
+		entry->logger->set_ike_sa(entry->logger, entry->sa);
 		this->channels->put(this->channels, (void*)entry->sa, entry);
 	}
 	this->lock->unlock(this->lock);

src/frontends/osx/charon-xpc/xpc_logger.c

@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2013 Martin Willi
+ * Copyright (C) 2013 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 "xpc_logger.h"
+
+typedef struct private_xpc_logger_t private_xpc_logger_t;
+
+/**
+ * Private data of an xpc_logger_t object.
+ */
+struct private_xpc_logger_t {
+
+	/**
+	 * Public xpc_logger_t interface.
+	 */
+	xpc_logger_t public;
+
+	/**
+	 * XPC channel to send logging messages to
+	 */
+	xpc_connection_t conn;
+
+	/**
+	 * IKE_SA we log for
+	 */
+	u_int32_t ike_sa;
+};
+
+METHOD(logger_t, log_, void,
+	private_xpc_logger_t *this, debug_t group, level_t level, int thread,
+	ike_sa_t* ike_sa, const char *message)
+{
+	if (ike_sa && ike_sa->get_unique_id(ike_sa) == this->ike_sa)
+	{
+		xpc_object_t msg;
+
+		msg = xpc_dictionary_create(NULL, NULL, 0);
+		xpc_dictionary_set_string(msg, "type", "event");
+		xpc_dictionary_set_string(msg, "event", "log");
+		xpc_dictionary_set_string(msg, "message", message);
+		xpc_connection_send_message(this->conn, msg);
+		xpc_release(msg);
+	}
+}
+
+METHOD(logger_t, get_level, level_t,
+	private_xpc_logger_t *this, debug_t group)
+{
+	return LEVEL_CTRL;
+}
+
+METHOD(xpc_logger_t, set_ike_sa, void,
+	private_xpc_logger_t *this, u_int32_t ike_sa)
+{
+	this->ike_sa = ike_sa;
+}
+
+METHOD(xpc_logger_t, destroy, void,
+	private_xpc_logger_t *this)
+{
+	free(this);
+}
+
+/**
+ * See header
+ */
+xpc_logger_t *xpc_logger_create(xpc_connection_t conn)
+{
+	private_xpc_logger_t *this;
+
+	INIT(this,
+		.public = {
+			.logger = {
+				.log = _log_,
+				.get_level = _get_level,
+			},
+			.set_ike_sa = _set_ike_sa,
+			.destroy = _destroy,
+		},
+		.conn = conn,
+	);
+
+	return &this->public;
+}

src/frontends/osx/charon-xpc/xpc_logger.h

@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2013 Martin Willi
+ * Copyright (C) 2013 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.
+ */
+
+/**
+ * @defgroup xpc_logger xpc_logger
+ * @{ @ingroup xpc
+ */
+
+#ifndef XPC_LOGGER_H_
+#define XPC_LOGGER_H_
+
+#include <xpc/xpc.h>
+
+#include <daemon.h>
+
+typedef struct xpc_logger_t xpc_logger_t;
+
+/**
+ * Connection specific logger over XPC.
+ */
+struct xpc_logger_t {
+
+	/**
+	 * Implements logger_t.
+	 */
+	logger_t logger;
+
+	/**
+	 * Set the IKE_SA unique identifier this logger logs for.
+	 *
+	 * @param ike_sa		IKE_SA unique identifier
+	 */
+	void (*set_ike_sa)(xpc_logger_t *this, u_int32_t ike_sa);
+
+	/**
+	 * Destroy a xpc_logger_t.
+	 */
+	void (*destroy)(xpc_logger_t *this);
+};
+
+/**
+ * Create a xpc_logger instance.
+ *
+ * @param conn		XPC connection to send logging events to
+ * @return			XPC logger
+ */
+xpc_logger_t *xpc_logger_create(xpc_connection_t conn);
+
+#endif /** XPC_LOGGER_H_ @}*/