Index: uspace/lib/net/generic/protocol_map.c
===================================================================
--- uspace/lib/net/generic/protocol_map.c	(revision 3cd95eff08637cef10501ec684a3ff757ab93451)
+++ uspace/lib/net/generic/protocol_map.c	(revision 3cd95eff08637cef10501ec684a3ff757ab93451)
@@ -0,0 +1,149 @@
+/*
+ * 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 libnet
+ * @{
+ */
+
+#include <protocol_map.h>
+#include <ethernet_lsap.h>
+#include <ethernet_protocols.h>
+#include <net_hardware.h>
+
+#include <ipc/services.h>
+
+/** Maps the internetwork layer service to the network interface layer type.
+ *
+ * @param[in] nil	Network interface layer service.
+ * @param[in] il	Internetwork layer service.
+ * @returns		Network interface layer type of the internetworking
+ *			layer service.
+ * @returns		Zero if mapping is not found.
+ */
+eth_type_t protocol_map(services_t nil, services_t il)
+{
+	switch (nil) {
+	case SERVICE_ETHERNET:
+	case SERVICE_DP8390:
+		switch (il) {
+		case SERVICE_IP:
+			return ETH_P_IP;
+		case SERVICE_ARP:
+			return ETH_P_ARP;
+		default:
+			return 0;
+		}
+	default:
+		return 0;
+	}
+}
+
+/** Maps the network interface layer type to the internetwork layer service.
+ *
+ * @param[in] nil	Network interface layer service.
+ * @param[in] protocol	Network interface layer type.
+ * @returns		Internetwork layer service of the network interface
+ *			layer type.
+ * @returns		Zero if mapping is not found.
+ */
+services_t protocol_unmap(services_t nil, int protocol)
+{
+	switch (nil) {
+	case SERVICE_ETHERNET:
+	case SERVICE_DP8390:
+		switch (protocol) {
+		case ETH_P_IP:
+			return SERVICE_IP;
+		case ETH_P_ARP:
+			return SERVICE_ARP;
+		default:
+			return 0;
+		}
+	default:
+		return 0;
+	}
+}
+
+/** Maps the link service access point identifier to the Ethernet protocol
+ * identifier.
+ *
+ * @param[in] lsap	Link service access point identifier.
+ * @returns		Ethernet protocol identifier of the link service access
+ *			point identifier.
+ * @returns		ETH_LSAP_NULL if mapping is not found.
+ */
+eth_type_t lsap_map(eth_lsap_t lsap)
+{
+	switch (lsap) {
+	case ETH_LSAP_IP:
+		return ETH_P_IP;
+	case ETH_LSAP_ARP:
+		return ETH_P_ARP;
+	default:
+		return ETH_LSAP_NULL;
+	}
+}
+
+/** Maps the Ethernet protocol identifier to the link service access point
+ * identifier.
+ *
+ * @param[in] ethertype	Ethernet protocol identifier.
+ * @returns		Link service access point identifier.
+ * @returns		Zero if mapping is not found.
+ */
+eth_lsap_t lsap_unmap(eth_type_t ethertype)
+{
+	switch (ethertype) {
+	case ETH_P_IP:
+		return ETH_LSAP_IP;
+	case ETH_P_ARP:
+		return ETH_LSAP_ARP;
+	default:
+		return 0;
+	}
+}
+
+/** Maps the network interface layer services to the hardware types.
+ *
+ * @param[in] nil	The network interface service.
+ * @returns		The hardware type of the network interface service.
+ * @returns		Zero if mapping is not found.
+ */
+hw_type_t hardware_map(services_t nil)
+{
+	switch (nil) {
+	case SERVICE_ETHERNET:
+	case SERVICE_DP8390:
+		return HW_ETHER;
+	default:
+		return 0;
+	}
+}
+
+/** @}
+ */