Index: uspace/lib/c/include/net/device.h
===================================================================
--- uspace/lib/c/include/net/device.h	(revision 514ee46735ae99a559924fd69a01def4b9b49fff)
+++ uspace/lib/c/include/net/device.h	(revision 514ee46735ae99a559924fd69a01def4b9b49fff)
@@ -0,0 +1,141 @@
+/*
+ * 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
+ * Device identifier, state and usage statistics.
+ */
+
+#ifndef LIBC_DEVICE_ID_TYPE_H_
+#define LIBC_DEVICE_ID_TYPE_H_
+
+#include <adt/int_map.h>
+
+/** Device identifier to generic type map declaration. */
+#define DEVICE_MAP_DECLARE	INT_MAP_DECLARE
+
+/** Device identifier to generic type map implementation. */
+#define DEVICE_MAP_IMPLEMENT	INT_MAP_IMPLEMENT
+
+/** Invalid device identifier. */
+#define DEVICE_INVALID_ID	(-1)
+
+/** Device identifier type. */
+typedef int device_id_t;
+
+/** Device state type. */
+typedef enum device_state device_state_t;
+
+/** Type definition of the device usage statistics.
+ * @see device_stats
+ */
+typedef struct device_stats device_stats_t;
+
+/** Type definition of the device usage statistics pointer.
+ * @see device_stats
+ */
+typedef device_stats_t *device_stats_ref;
+
+/** Device state. */
+enum device_state {
+	/** Device not present or not initialized. */
+	NETIF_NULL = 0,
+	/** Device present and stopped. */
+	NETIF_STOPPED,
+	/** Device present and active. */
+	NETIF_ACTIVE,
+	/** Device present but unable to transmit. */
+	NETIF_CARRIER_LOST
+};
+
+/** Device usage statistics. */
+struct device_stats {
+	/** Total packets received. */
+	unsigned long receive_packets;
+	/** Total packets transmitted. */
+	unsigned long send_packets;
+	/** Total bytes received. */
+	unsigned long receive_bytes;
+	/** Total bytes transmitted. */
+	unsigned long send_bytes;
+	/** Bad packets received counter. */
+	unsigned long receive_errors;
+	/** Packet transmition problems counter. */
+	unsigned long send_errors;
+	/** No space in buffers counter. */
+	unsigned long receive_dropped;
+	/** No space available counter. */
+	unsigned long send_dropped;
+	/** Total multicast packets received. */
+	unsigned long multicast;
+	/** The number of collisions due to congestion on the medium. */
+	unsigned long collisions;
+
+	/* detailed receive_errors */
+
+	/** Received packet length error counter. */
+	unsigned long receive_length_errors;
+	/** Receiver buffer overflow counter. */
+	unsigned long receive_over_errors;
+	/** Received packet with crc error counter. */
+	unsigned long receive_crc_errors;
+	/** Received frame alignment error counter. */
+	unsigned long receive_frame_errors;
+	/** Receiver fifo overrun counter. */
+	unsigned long receive_fifo_errors;
+	/** Receiver missed packet counter. */
+	unsigned long receive_missed_errors;
+
+	/* detailed send_errors */
+
+	/** Transmitter aborted counter. */
+	unsigned long send_aborted_errors;
+	/** Transmitter carrier errors counter. */
+	unsigned long send_carrier_errors;
+	/** Transmitter fifo overrun counter. */
+	unsigned long send_fifo_errors;
+	/** Transmitter carrier errors counter. */
+	unsigned long send_heartbeat_errors;
+	/** Transmitter window errors counter. */
+	unsigned long send_window_errors;
+
+	/* for cslip etc */
+	
+	/** Total compressed packets received. */
+	unsigned long receive_compressed;
+	/** Total compressed packet transmitted. */
+	unsigned long send_compressed;
+};
+
+#endif
+
+/** @}
+ */