protocol_map.c

00001 /*
00002  * Copyright (c) 2009 Lukas Mejdrech
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  *
00009  * - Redistributions of source code must retain the above copyright
00010  *   notice, this list of conditions and the following disclaimer.
00011  * - Redistributions in binary form must reproduce the above copyright
00012  *   notice, this list of conditions and the following disclaimer in the
00013  *   documentation and/or other materials provided with the distribution.
00014  * - The name of the author may not be used to endorse or promote products
00015  *   derived from this software without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
00018  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00019  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
00020  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
00021  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
00022  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00023  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00024  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00025  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
00026  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00027  */
00028 
00033 #include <protocol_map.h>
00034 #include <ethernet_lsap.h>
00035 #include <ethernet_protocols.h>
00036 #include <net_hardware.h>
00037 
00038 #include <ipc/services.h>
00039 
00048 eth_type_t protocol_map(services_t nil, services_t il)
00049 {
00050         switch (nil) {
00051         case SERVICE_ETHERNET:
00052         case SERVICE_NE2000:
00053                 switch (il) {
00054                 case SERVICE_IP:
00055                         return ETH_P_IP;
00056                 case SERVICE_ARP:
00057                         return ETH_P_ARP;
00058                 default:
00059                         return 0;
00060                 }
00061         default:
00062                 return 0;
00063         }
00064 }
00065 
00074 services_t protocol_unmap(services_t nil, int protocol)
00075 {
00076         switch (nil) {
00077         case SERVICE_ETHERNET:
00078         case SERVICE_NE2000:
00079                 switch (protocol) {
00080                 case ETH_P_IP:
00081                         return SERVICE_IP;
00082                 case ETH_P_ARP:
00083                         return SERVICE_ARP;
00084                 default:
00085                         return 0;
00086                 }
00087         default:
00088                 return 0;
00089         }
00090 }
00091 
00100 eth_type_t lsap_map(eth_lsap_t lsap)
00101 {
00102         switch (lsap) {
00103         case ETH_LSAP_IP:
00104                 return ETH_P_IP;
00105         case ETH_LSAP_ARP:
00106                 return ETH_P_ARP;
00107         default:
00108                 return ETH_LSAP_NULL;
00109         }
00110 }
00111 
00119 eth_lsap_t lsap_unmap(eth_type_t ethertype)
00120 {
00121         switch (ethertype) {
00122         case ETH_P_IP:
00123                 return ETH_LSAP_IP;
00124         case ETH_P_ARP:
00125                 return ETH_LSAP_ARP;
00126         default:
00127                 return 0;
00128         }
00129 }
00130 
00137 hw_type_t hardware_map(services_t nil)
00138 {
00139         switch (nil) {
00140         case SERVICE_ETHERNET:
00141         case SERVICE_NE2000:
00142                 return HW_ETHER;
00143         default:
00144                 return 0;
00145         }
00146 }
00147 

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