diff options
Diffstat (limited to 'qemu/roms/ipxe/src/net/ethernet.c')
| -rw-r--r-- | qemu/roms/ipxe/src/net/ethernet.c | 283 |
1 files changed, 0 insertions, 283 deletions
diff --git a/qemu/roms/ipxe/src/net/ethernet.c b/qemu/roms/ipxe/src/net/ethernet.c deleted file mode 100644 index 6ddf05344..000000000 --- a/qemu/roms/ipxe/src/net/ethernet.c +++ /dev/null @@ -1,283 +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 <stdio.h> -#include <string.h> -#include <byteswap.h> -#include <errno.h> -#include <assert.h> -#include <ipxe/if_arp.h> -#include <ipxe/if_ether.h> -#include <ipxe/in.h> -#include <ipxe/netdevice.h> -#include <ipxe/iobuf.h> -#include <ipxe/ethernet.h> - -/** @file - * - * Ethernet protocol - * - */ - -/** Ethernet broadcast MAC address */ -uint8_t eth_broadcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; - -/** - * Check if Ethernet packet has an 802.3 LLC header - * - * @v ethhdr Ethernet header - * @ret is_llc Packet has 802.3 LLC header - */ -static inline int eth_is_llc_packet ( struct ethhdr *ethhdr ) { - uint8_t len_msb; - - /* Check if the protocol field contains a value short enough - * to be a frame length. The slightly convoluted form of the - * comparison is designed to reduce to a single x86 - * instruction. - */ - len_msb = *( ( uint8_t * ) ðhdr->h_protocol ); - return ( len_msb < 0x06 ); -} - -/** - * Add Ethernet link-layer header - * - * @v netdev Network device - * @v iobuf I/O buffer - * @v ll_dest Link-layer destination address - * @v ll_source Source link-layer address - * @v net_proto Network-layer protocol, in network-byte order - * @ret rc Return status code - */ -int eth_push ( struct net_device *netdev __unused, struct io_buffer *iobuf, - const void *ll_dest, const void *ll_source, - uint16_t net_proto ) { - struct ethhdr *ethhdr = iob_push ( iobuf, sizeof ( *ethhdr ) ); - - /* Build Ethernet header */ - memcpy ( ethhdr->h_dest, ll_dest, ETH_ALEN ); - memcpy ( ethhdr->h_source, ll_source, ETH_ALEN ); - ethhdr->h_protocol = net_proto; - - return 0; -} - -/** - * Remove Ethernet link-layer header - * - * @v netdev Network device - * @v iobuf I/O buffer - * @ret ll_dest Link-layer destination address - * @ret ll_source Source link-layer address - * @ret net_proto Network-layer protocol, in network-byte order - * @ret flags Packet flags - * @ret rc Return status code - */ -int eth_pull ( struct net_device *netdev __unused, struct io_buffer *iobuf, - const void **ll_dest, const void **ll_source, - uint16_t *net_proto, unsigned int *flags ) { - struct ethhdr *ethhdr = iobuf->data; - uint16_t *llc_proto; - - /* Sanity check. While in theory we could receive a one-byte - * packet, this will never happen in practice and performing - * the combined length check here avoids the need for an - * additional comparison if we detect an LLC frame. - */ - if ( iob_len ( iobuf ) < ( sizeof ( *ethhdr ) + sizeof ( *llc_proto ))){ - DBG ( "Ethernet packet too short (%zd bytes)\n", - iob_len ( iobuf ) ); - return -EINVAL; - } - - /* Strip off Ethernet header */ - iob_pull ( iobuf, sizeof ( *ethhdr ) ); - - /* Fill in required fields */ - *ll_dest = ethhdr->h_dest; - *ll_source = ethhdr->h_source; - *net_proto = ethhdr->h_protocol; - *flags = ( ( is_multicast_ether_addr ( ethhdr->h_dest ) ? - LL_MULTICAST : 0 ) | - ( is_broadcast_ether_addr ( ethhdr->h_dest ) ? - LL_BROADCAST : 0 ) ); - - /* If this is an LLC frame (with a length in place of the - * protocol field), then use the next two bytes (which happen - * to be the LLC DSAP and SSAP) as the protocol. This allows - * for minimal-overhead support for receiving (rare) LLC - * frames, without requiring a full LLC protocol layer. - */ - if ( eth_is_llc_packet ( ethhdr ) ) { - llc_proto = ( ðhdr->h_protocol + 1 ); - *net_proto = *llc_proto; - } - - return 0; -} - -/** - * Initialise Ethernet address - * - * @v hw_addr Hardware address - * @v ll_addr Link-layer address - */ -void eth_init_addr ( const void *hw_addr, void *ll_addr ) { - memcpy ( ll_addr, hw_addr, ETH_ALEN ); -} - -/** - * Generate random Ethernet address - * - * @v hw_addr Generated hardware address - */ -void eth_random_addr ( void *hw_addr ) { - uint8_t *addr = hw_addr; - unsigned int i; - - for ( i = 0 ; i < ETH_ALEN ; i++ ) - addr[i] = random(); - addr[0] &= ~0x01; /* Clear multicast bit */ - addr[0] |= 0x02; /* Set locally-assigned bit */ -} - -/** - * Transcribe Ethernet address - * - * @v ll_addr Link-layer address - * @ret string Link-layer address in human-readable format - */ -const char * eth_ntoa ( const void *ll_addr ) { - static char buf[18]; /* "00:00:00:00:00:00" */ - const uint8_t *eth_addr = ll_addr; - - sprintf ( buf, "%02x:%02x:%02x:%02x:%02x:%02x", - eth_addr[0], eth_addr[1], eth_addr[2], - eth_addr[3], eth_addr[4], eth_addr[5] ); - return buf; -} - -/** - * Hash multicast address - * - * @v af Address family - * @v net_addr Network-layer address - * @v ll_addr Link-layer address to fill in - * @ret rc Return status code - */ -int eth_mc_hash ( unsigned int af, const void *net_addr, void *ll_addr ) { - const uint8_t *net_addr_bytes = net_addr; - uint8_t *ll_addr_bytes = ll_addr; - - switch ( af ) { - case AF_INET: - ll_addr_bytes[0] = 0x01; - ll_addr_bytes[1] = 0x00; - ll_addr_bytes[2] = 0x5e; - ll_addr_bytes[3] = net_addr_bytes[1] & 0x7f; - ll_addr_bytes[4] = net_addr_bytes[2]; - ll_addr_bytes[5] = net_addr_bytes[3]; - return 0; - case AF_INET6: - ll_addr_bytes[0] = 0x33; - ll_addr_bytes[1] = 0x33; - memcpy ( &ll_addr_bytes[2], &net_addr_bytes[12], 4 ); - return 0; - default: - return -ENOTSUP; - } -} - -/** - * Generate Ethernet-compatible compressed link-layer address - * - * @v ll_addr Link-layer address - * @v eth_addr Ethernet-compatible address to fill in - */ -int eth_eth_addr ( const void *ll_addr, void *eth_addr ) { - memcpy ( eth_addr, ll_addr, ETH_ALEN ); - return 0; -} - -/** - * Generate EUI-64 address - * - * @v ll_addr Link-layer address - * @v eui64 EUI-64 address to fill in - * @ret rc Return status code - */ -int eth_eui64 ( const void *ll_addr, void *eui64 ) { - - memcpy ( ( eui64 + 0 ), ( ll_addr + 0 ), 3 ); - memcpy ( ( eui64 + 5 ), ( ll_addr + 3 ), 3 ); - *( ( uint16_t * ) ( eui64 + 3 ) ) = htons ( 0xfffe ); - return 0; -} - -/** Ethernet protocol */ -struct ll_protocol ethernet_protocol __ll_protocol = { - .name = "Ethernet", - .ll_proto = htons ( ARPHRD_ETHER ), - .hw_addr_len = ETH_ALEN, - .ll_addr_len = ETH_ALEN, - .ll_header_len = ETH_HLEN, - .push = eth_push, - .pull = eth_pull, - .init_addr = eth_init_addr, - .ntoa = eth_ntoa, - .mc_hash = eth_mc_hash, - .eth_addr = eth_eth_addr, - .eui64 = eth_eui64, -}; - -/** - * Allocate Ethernet device - * - * @v priv_size Size of driver private data - * @ret netdev Network device, or NULL - */ -struct net_device * alloc_etherdev ( size_t priv_size ) { - struct net_device *netdev; - - netdev = alloc_netdev ( priv_size ); - if ( netdev ) { - netdev->ll_protocol = ðernet_protocol; - netdev->ll_broadcast = eth_broadcast; - netdev->max_pkt_len = ETH_FRAME_LEN; - } - return netdev; -} - -/* Drag in objects via ethernet_protocol */ -REQUIRING_SYMBOL ( ethernet_protocol ); - -/* Drag in Ethernet configuration */ -REQUIRE_OBJECT ( config_ethernet ); - -/* Drag in Ethernet slow protocols */ -REQUIRE_OBJECT ( eth_slow ); |