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 *  @param nil Network interface layer service. Input parameter.
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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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 *  @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 Network interface layer type of the internetworking layer service.
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 *  @returns 0 if mapping is not found.
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 *  @returns 0 if mapping is not found.
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 */
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 */
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static inline int protocol_map( services_t nil, services_t il ){
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static inline eth_type_t protocol_map( services_t nil, services_t il ){
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    switch( nil ){
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    switch( nil ){
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        case SERVICE_ETHERNET:
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        case SERVICE_ETHERNET:
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        case SERVICE_DP8390:
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        case SERVICE_DP8390:
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            switch( il ){
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            switch( il ){
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                case SERVICE_IP:
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                case SERVICE_IP:
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/** Maps the link service access point identifier to the Ethernet protocol identifier.
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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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 *  @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 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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 *  @returns ETH_LSAP_NULL if mapping is not found.
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 */
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 */
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static inline int lsap_map( int lsap ){
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static inline int lsap_map( eth_lsap_t lsap ){
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    switch( lsap ){
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    switch( lsap ){
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        case ETH_LSAP_IP:
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        case ETH_LSAP_IP:
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            return ETH_P_IP;
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            return ETH_P_IP;
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        case ETH_LSAP_ARP:
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        case ETH_LSAP_ARP:
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            return ETH_P_ARP;
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            return ETH_P_ARP;
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/** Maps the network interface layer services to the hardware types.
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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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 *  @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 The hardware type of the network interface service.
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 *  @returns 0 if mapping is not found.
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 *  @returns 0 if mapping is not found.
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 */
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 */
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static inline int hardware_map( services_t nil ){
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static inline hw_type_t hardware_map( services_t nil ){
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    switch( nil ){
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    switch( nil ){
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        case SERVICE_ETHERNET:
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        case SERVICE_ETHERNET:
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        case SERVICE_DP8390:
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        case SERVICE_DP8390:
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            return HW_ETHER;
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            return HW_ETHER;
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        default:
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        default: