Index: uspace/lib/c/include/ipc/tl.h
===================================================================
--- uspace/lib/c/include/ipc/tl.h	(revision 8d601dbff714a8e33d29f4c80051a46e4121abb4)
+++ uspace/lib/c/include/ipc/tl.h	(revision 8d601dbff714a8e33d29f4c80051a46e4121abb4)
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2009 Lukas Mejdrech
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+
+/** @file
+ * Transport layer modules messages.
+ * @see tl_interface.h
+ */
+
+#ifndef LIBC_TL_MESSAGES_H_
+#define LIBC_TL_MESSAGES_H_
+
+#include <ipc/ipc.h>
+#include <ipc/net.h>
+
+/** Transport layer modules messages. */
+typedef enum {
+	/** Packet received message.
+	 * @see tl_received_msg()
+	 */
+	NET_TL_RECEIVED = NET_TL_FIRST
+} tl_messages;
+
+#endif
+
+/** @}
+ */