1 /* 2 * Copyright (C) 2007 Michael Brown <mbrown (at) fensystems.co.uk>. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License as 6 * published by the Free Software Foundation; either version 2 of the 7 * License, or any later version. 8 * 9 * This program is distributed in the hope that it will be useful, but 10 * WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 17 */ 18 19 FILE_LICENCE ( GPL2_OR_LATER ); 20 21 #include <stdint.h> 22 #include <byteswap.h> 23 #include <gpxe/netdevice.h> 24 #include <gpxe/iobuf.h> 25 #include <gpxe/if_ether.h> 26 #include <gpxe/rarp.h> 27 28 /** @file 29 * 30 * Reverse Address Resolution Protocol 31 * 32 */ 33 34 /** 35 * Process incoming ARP packets 36 * 37 * @v iobuf I/O buffer 38 * @v netdev Network device 39 * @v ll_source Link-layer source address 40 * @ret rc Return status code 41 * 42 * This is a dummy method which simply discards RARP packets. 43 */ 44 static int rarp_rx ( struct io_buffer *iobuf, 45 struct net_device *netdev __unused, 46 const void *ll_source __unused ) { 47 free_iob ( iobuf ); 48 return 0; 49 } 50 51 52 /** 53 * Transcribe RARP address 54 * 55 * @v net_addr RARP address 56 * @ret string "<RARP>" 57 * 58 * This operation is meaningless for the RARP protocol. 59 */ 60 static const char * rarp_ntoa ( const void *net_addr __unused ) { 61 return "<RARP>"; 62 } 63 64 /** RARP protocol */ 65 struct net_protocol rarp_protocol __net_protocol = { 66 .name = "RARP", 67 .net_proto = htons ( ETH_P_RARP ), 68 .rx = rarp_rx, 69 .ntoa = rarp_ntoa, 70 }; 71
