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3912 mejdrech 1 
/*
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 * Copyright (c) 2009 Lukas Mejdrech
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup net_nil
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 *  @{
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 */
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/** @file
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 *  Internetwork layer services - network interface layer service type translation.
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 */
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#ifndef __NET_PROTOCOL_MAP_H__
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#define __NET_PROTOCOL_MAP_H__
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#include <ipc/services.h>
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#include "ethernet_lsap.h"
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#include "ethernet_protocols.h"
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#include "hardware.h"
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/** Maps the internetwork layer service to the network interface layer type.
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 *  @param nil Network interface layer service. Input parameter.
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 *  @param il Internetwork layer service. Input parameter.
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 *  @returns Network interface layer type of the internetworking layer service.
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 *  @returns 0 if mapping is not found.
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 */
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static inline int protocol_map( services_t nil, services_t il ){
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    switch( nil ){
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        case SERVICE_ETHERNET:
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        case SERVICE_DP8390:
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            switch( il ){
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                case SERVICE_IP:
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                    return ETH_P_IP;
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                case SERVICE_ARP:
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                    return ETH_P_ARP;
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                default:
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                    return 0;
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            }
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        default:
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            return 0;
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    }
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}
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/** Maps the network interface layer type to the internetwork layer service.
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 *  @param nil Network interface layer service. Input parameter.
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 *  @param protocol Network interface layer type. Input parameter.
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 *  @returns Internetwork layer service of the network interface layer type.
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 *  @returns 0 if mapping is not found.
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 */
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static inline services_t protocol_unmap( services_t nil, int protocol ){
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    switch( nil ){
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        case SERVICE_ETHERNET:
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        case SERVICE_DP8390:
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            switch( protocol ){
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                case ETH_P_IP:
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                    return SERVICE_IP;
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                case ETH_P_ARP:
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                    return SERVICE_ARP;
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                default:
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                    return 0;
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            }
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        default:
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            return 0;
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    }
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}
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/** Maps the link service access point identifier to the Ethernet protocol identifier.
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 *  @param lsap Link service access point identifier. Input parameter.
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 *  @returns Ethernet protocol identifier of the link service access point identifier.
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 *  @returns ETH_LSAP_NULL if mapping is not found.
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 */
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static inline int lsap_map( int lsap ){
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    switch( lsap ){
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        case ETH_LSAP_IP:
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            return ETH_P_IP;
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        case ETH_LSAP_ARP:
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            return ETH_P_ARP;
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        default:
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            return ETH_LSAP_NULL;
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    }
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}
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/** Maps the network interface layer services to the hardware types.
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 *  @param nil The network interface service. Input parameter.
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 *  @returns The hardware type of the network interface service.
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 *  @returns 0 if mapping is not found.
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 */
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static inline int hardware_map( services_t nil ){
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    switch( nil ){
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        case SERVICE_ETHERNET:
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        case SERVICE_DP8390:
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            return HW_ETHER;
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        default:
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            return 0;
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    }
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}
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#endif
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/** @}
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 */