Greg Hartman | 76d05dc | 2016-11-23 15:51:27 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 Michael Brown <mbrown@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 | }; |