diff options
Diffstat (limited to 'qemu/roms/ipxe/src/net/arp.c')
| -rw-r--r-- | qemu/roms/ipxe/src/net/arp.c | 224 |
1 files changed, 0 insertions, 224 deletions
diff --git a/qemu/roms/ipxe/src/net/arp.c b/qemu/roms/ipxe/src/net/arp.c deleted file mode 100644 index 1e27c44e7..000000000 --- a/qemu/roms/ipxe/src/net/arp.c +++ /dev/null @@ -1,224 +0,0 @@ -/* - * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -#include <stdint.h> -#include <stdlib.h> -#include <string.h> -#include <byteswap.h> -#include <errno.h> -#include <ipxe/if_ether.h> -#include <ipxe/if_arp.h> -#include <ipxe/iobuf.h> -#include <ipxe/netdevice.h> -#include <ipxe/neighbour.h> -#include <ipxe/arp.h> - -/** @file - * - * Address Resolution Protocol - * - * This file implements the address resolution protocol as defined in - * RFC826. The implementation is media-independent and - * protocol-independent; it is not limited to Ethernet or to IPv4. - * - */ - -struct net_protocol arp_protocol __net_protocol; - -/** - * Transmit ARP request - * - * @v netdev Network device - * @v net_protocol Network-layer protocol - * @v net_dest Destination network-layer address - * @v net_source Source network-layer address - * @ret rc Return status code - */ -int arp_tx_request ( struct net_device *netdev, - struct net_protocol *net_protocol, - const void *net_dest, const void *net_source ) { - struct ll_protocol *ll_protocol = netdev->ll_protocol; - struct io_buffer *iobuf; - struct arphdr *arphdr; - int rc; - - /* Allocate ARP packet */ - iobuf = alloc_iob ( MAX_LL_HEADER_LEN + sizeof ( *arphdr ) + - ( 2 * ( MAX_LL_ADDR_LEN + MAX_NET_ADDR_LEN ) ) ); - if ( ! iobuf ) - return -ENOMEM; - iob_reserve ( iobuf, MAX_LL_HEADER_LEN ); - - /* Build up ARP request */ - arphdr = iob_put ( iobuf, sizeof ( *arphdr ) ); - arphdr->ar_hrd = ll_protocol->ll_proto; - arphdr->ar_hln = ll_protocol->ll_addr_len; - arphdr->ar_pro = net_protocol->net_proto; - arphdr->ar_pln = net_protocol->net_addr_len; - arphdr->ar_op = htons ( ARPOP_REQUEST ); - memcpy ( iob_put ( iobuf, ll_protocol->ll_addr_len ), - netdev->ll_addr, ll_protocol->ll_addr_len ); - memcpy ( iob_put ( iobuf, net_protocol->net_addr_len ), - net_source, net_protocol->net_addr_len ); - memset ( iob_put ( iobuf, ll_protocol->ll_addr_len ), - 0, ll_protocol->ll_addr_len ); - memcpy ( iob_put ( iobuf, net_protocol->net_addr_len ), - net_dest, net_protocol->net_addr_len ); - - /* Transmit ARP request */ - if ( ( rc = net_tx ( iobuf, netdev, &arp_protocol, - netdev->ll_broadcast, netdev->ll_addr ) ) != 0 ) { - DBGC ( netdev, "ARP %s %s %s could not transmit request: %s\n", - netdev->name, net_protocol->name, - net_protocol->ntoa ( net_dest ), strerror ( rc ) ); - return rc; - } - - return 0; -} - -/** ARP neighbour discovery protocol */ -struct neighbour_discovery arp_discovery = { - .name = "ARP", - .tx_request = arp_tx_request, -}; - -/** - * Identify ARP protocol - * - * @v net_proto Network-layer protocol, in network-endian order - * @ret arp_net_protocol ARP protocol, or NULL - * - */ -static struct arp_net_protocol * arp_find_protocol ( uint16_t net_proto ) { - struct arp_net_protocol *arp_net_protocol; - - for_each_table_entry ( arp_net_protocol, ARP_NET_PROTOCOLS ) { - if ( arp_net_protocol->net_protocol->net_proto == net_proto ) - return arp_net_protocol; - } - return NULL; -} - -/** - * Process incoming ARP packets - * - * @v iobuf I/O buffer - * @v netdev Network device - * @v ll_source Link-layer source address - * @v flags Packet flags - * @ret rc Return status code - */ -static int arp_rx ( struct io_buffer *iobuf, struct net_device *netdev, - const void *ll_dest __unused, - const void *ll_source __unused, - unsigned int flags __unused ) { - struct arphdr *arphdr = iobuf->data; - struct arp_net_protocol *arp_net_protocol; - struct net_protocol *net_protocol; - struct ll_protocol *ll_protocol; - int rc; - - /* Identify network-layer and link-layer protocols */ - arp_net_protocol = arp_find_protocol ( arphdr->ar_pro ); - if ( ! arp_net_protocol ) { - rc = -EPROTONOSUPPORT; - goto done; - } - net_protocol = arp_net_protocol->net_protocol; - ll_protocol = netdev->ll_protocol; - - /* Sanity checks */ - if ( ( arphdr->ar_hrd != ll_protocol->ll_proto ) || - ( arphdr->ar_hln != ll_protocol->ll_addr_len ) || - ( arphdr->ar_pln != net_protocol->net_addr_len ) ) { - rc = -EINVAL; - goto done; - } - - /* Update neighbour cache entry for this sender, if any */ - neighbour_update ( netdev, net_protocol, arp_sender_pa ( arphdr ), - arp_sender_ha ( arphdr ) ); - - /* If it's not a request, there's nothing more to do */ - if ( arphdr->ar_op != htons ( ARPOP_REQUEST ) ) { - rc = 0; - goto done; - } - - /* See if we own the target protocol address */ - if ( arp_net_protocol->check ( netdev, arp_target_pa ( arphdr ) ) != 0){ - rc = 0; - goto done; - } - - /* Change request to a reply */ - DBGC2 ( netdev, "ARP %s %s %s reply => %s %s\n", - netdev->name, net_protocol->name, - net_protocol->ntoa ( arp_target_pa ( arphdr ) ), - ll_protocol->name, ll_protocol->ntoa ( netdev->ll_addr ) ); - arphdr->ar_op = htons ( ARPOP_REPLY ); - memswap ( arp_sender_ha ( arphdr ), arp_target_ha ( arphdr ), - arphdr->ar_hln + arphdr->ar_pln ); - memcpy ( arp_sender_ha ( arphdr ), netdev->ll_addr, arphdr->ar_hln ); - - /* Send reply */ - if ( ( rc = net_tx ( iob_disown ( iobuf ), netdev, &arp_protocol, - arp_target_ha ( arphdr ), - netdev->ll_addr ) ) != 0 ) { - DBGC ( netdev, "ARP %s %s %s could not transmit reply: %s\n", - netdev->name, net_protocol->name, - net_protocol->ntoa ( arp_target_pa ( arphdr ) ), - strerror ( rc ) ); - goto done; - } - - /* Success */ - rc = 0; - - done: - free_iob ( iobuf ); - return rc; -} - -/** - * Transcribe ARP address - * - * @v net_addr ARP address - * @ret string "<ARP>" - * - * This operation is meaningless for the ARP protocol. - */ -static const char * arp_ntoa ( const void *net_addr __unused ) { - return "<ARP>"; -} - -/** ARP network protocol */ -struct net_protocol arp_protocol __net_protocol = { - .name = "ARP", - .net_proto = htons ( ETH_P_ARP ), - .rx = arp_rx, - .ntoa = arp_ntoa, -}; |