Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * INET An implementation of the TCP/IP protocol suite for the LINUX |
| 3 | * operating system. INET is implemented using the BSD Socket |
| 4 | * interface as the means of communication with the user level. |
| 5 | * |
| 6 | * Ethernet-type device handling. |
| 7 | * |
| 8 | * Version: @(#)eth.c 1.0.7 05/25/93 |
| 9 | * |
Jesper Juhl | 02c30a8 | 2005-05-05 16:16:16 -0700 | [diff] [blame] | 10 | * Authors: Ross Biro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| 12 | * Mark Evans, <evansmp@uhura.aston.ac.uk> |
| 13 | * Florian La Roche, <rzsfl@rz.uni-sb.de> |
| 14 | * Alan Cox, <gw4pts@gw4pts.ampr.org> |
YOSHIFUJI Hideaki | 03d52d7 | 2007-02-09 23:24:44 +0900 | [diff] [blame] | 15 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | * Fixes: |
| 17 | * Mr Linux : Arp problems |
| 18 | * Alan Cox : Generic queue tidyup (very tiny here) |
| 19 | * Alan Cox : eth_header ntohs should be htons |
| 20 | * Alan Cox : eth_rebuild_header missing an htons and |
| 21 | * minor other things. |
YOSHIFUJI Hideaki | 03d52d7 | 2007-02-09 23:24:44 +0900 | [diff] [blame] | 22 | * Tegge : Arp bug fixes. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | * Florian : Removed many unnecessary functions, code cleanup |
| 24 | * and changes for new arp and skbuff. |
| 25 | * Alan Cox : Redid header building to reflect new format. |
| 26 | * Alan Cox : ARP only when compiled with CONFIG_INET |
| 27 | * Greg Page : 802.2 and SNAP stuff. |
| 28 | * Alan Cox : MAC layer pointers/new format. |
| 29 | * Paul Gortmaker : eth_copy_and_sum shouldn't csum padding. |
| 30 | * Alan Cox : Protect against forwarding explosions with |
| 31 | * older network drivers and IFF_ALLMULTI. |
| 32 | * Christer Weinigel : Better rebuild header message. |
| 33 | * Andrew Morton : 26Feb01: kill ether_setup() - use netdev_boot_setup(). |
| 34 | * |
| 35 | * This program is free software; you can redistribute it and/or |
| 36 | * modify it under the terms of the GNU General Public License |
| 37 | * as published by the Free Software Foundation; either version |
| 38 | * 2 of the License, or (at your option) any later version. |
| 39 | */ |
| 40 | #include <linux/module.h> |
| 41 | #include <linux/types.h> |
| 42 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <linux/string.h> |
| 44 | #include <linux/mm.h> |
| 45 | #include <linux/socket.h> |
| 46 | #include <linux/in.h> |
| 47 | #include <linux/inet.h> |
| 48 | #include <linux/ip.h> |
| 49 | #include <linux/netdevice.h> |
| 50 | #include <linux/etherdevice.h> |
| 51 | #include <linux/skbuff.h> |
| 52 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #include <linux/init.h> |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 54 | #include <linux/if_ether.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | #include <net/dst.h> |
| 56 | #include <net/arp.h> |
| 57 | #include <net/sock.h> |
| 58 | #include <net/ipv6.h> |
| 59 | #include <net/ip.h> |
Lennert Buytenhek | cf85d08 | 2008-10-07 13:45:02 +0000 | [diff] [blame] | 60 | #include <net/dsa.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #include <asm/uaccess.h> |
| 62 | #include <asm/system.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | __setup("ether=", netdev_boot_setup); |
| 65 | |
Stephen Hemminger | d3e01f7 | 2006-08-17 18:18:53 -0700 | [diff] [blame] | 66 | /** |
| 67 | * eth_header - create the Ethernet header |
| 68 | * @skb: buffer to alter |
| 69 | * @dev: source device |
| 70 | * @type: Ethernet type field |
| 71 | * @daddr: destination address (NULL leave destination address) |
| 72 | * @saddr: source address (NULL use device source address) |
| 73 | * @len: packet length (<= skb->len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | * |
Stephen Hemminger | d3e01f7 | 2006-08-17 18:18:53 -0700 | [diff] [blame] | 75 | * |
Octavian Purdila | bf9ae53 | 2009-12-26 11:50:59 +0000 | [diff] [blame] | 76 | * Set the protocol type. For a packet of type ETH_P_802_3/2 we put the length |
| 77 | * in here instead. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | */ |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 79 | int eth_header(struct sk_buff *skb, struct net_device *dev, |
| 80 | unsigned short type, |
| 81 | const void *daddr, const void *saddr, unsigned len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | { |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 83 | struct ethhdr *eth = (struct ethhdr *)skb_push(skb, ETH_HLEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
Octavian Purdila | bf9ae53 | 2009-12-26 11:50:59 +0000 | [diff] [blame] | 85 | if (type != ETH_P_802_3 && type != ETH_P_802_2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | eth->h_proto = htons(type); |
| 87 | else |
| 88 | eth->h_proto = htons(len); |
| 89 | |
| 90 | /* |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 91 | * Set the source hardware address. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 94 | if (!saddr) |
| 95 | saddr = dev->dev_addr; |
Stephen Hemminger | 23f1f4e | 2007-08-24 22:35:44 -0700 | [diff] [blame] | 96 | memcpy(eth->h_source, saddr, ETH_ALEN); |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 97 | |
| 98 | if (daddr) { |
Stephen Hemminger | 23f1f4e | 2007-08-24 22:35:44 -0700 | [diff] [blame] | 99 | memcpy(eth->h_dest, daddr, ETH_ALEN); |
Jamal Hadi Salim | f8d0e3f | 2006-02-23 16:18:01 -0800 | [diff] [blame] | 100 | return ETH_HLEN; |
| 101 | } |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | /* |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 104 | * Anyway, the loopback-device should never use this function... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | */ |
| 106 | |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 107 | if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) { |
Stephen Hemminger | 23f1f4e | 2007-08-24 22:35:44 -0700 | [diff] [blame] | 108 | memset(eth->h_dest, 0, ETH_ALEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | return ETH_HLEN; |
| 110 | } |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | return -ETH_HLEN; |
| 113 | } |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 114 | EXPORT_SYMBOL(eth_header); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
Stephen Hemminger | d3e01f7 | 2006-08-17 18:18:53 -0700 | [diff] [blame] | 116 | /** |
| 117 | * eth_rebuild_header- rebuild the Ethernet MAC header. |
| 118 | * @skb: socket buffer to update |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | * |
Stephen Hemminger | d3e01f7 | 2006-08-17 18:18:53 -0700 | [diff] [blame] | 120 | * This is called after an ARP or IPV6 ndisc it's resolution on this |
| 121 | * sk_buff. We now let protocol (ARP) fill in the other fields. |
| 122 | * |
| 123 | * This routine CANNOT use cached dst->neigh! |
| 124 | * Really, it is used only when dst->neigh is wrong. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | int eth_rebuild_header(struct sk_buff *skb) |
| 127 | { |
| 128 | struct ethhdr *eth = (struct ethhdr *)skb->data; |
| 129 | struct net_device *dev = skb->dev; |
| 130 | |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 131 | switch (eth->h_proto) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | #ifdef CONFIG_INET |
Arnaldo Carvalho de Melo | 6067804 | 2008-09-20 22:20:49 -0700 | [diff] [blame] | 133 | case htons(ETH_P_IP): |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 134 | return arp_find(eth->h_dest, skb); |
| 135 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | default: |
| 137 | printk(KERN_DEBUG |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 138 | "%s: unable to resolve type %X addresses.\n", |
Johannes Berg | b002a86 | 2010-04-20 21:06:07 +0000 | [diff] [blame^] | 139 | dev->name, ntohs(eth->h_proto)); |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 140 | |
Stephen Hemminger | 23f1f4e | 2007-08-24 22:35:44 -0700 | [diff] [blame] | 141 | memcpy(eth->h_source, dev->dev_addr, ETH_ALEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | break; |
| 143 | } |
| 144 | |
| 145 | return 0; |
| 146 | } |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 147 | EXPORT_SYMBOL(eth_rebuild_header); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
Stephen Hemminger | d3e01f7 | 2006-08-17 18:18:53 -0700 | [diff] [blame] | 149 | /** |
| 150 | * eth_type_trans - determine the packet's protocol ID. |
| 151 | * @skb: received socket data |
| 152 | * @dev: receiving network device |
| 153 | * |
| 154 | * The rule here is that we |
| 155 | * assume 802.3 if the type field is short enough to be a length. |
| 156 | * This is normal practice and works for any 'now in use' protocol. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | */ |
Alexey Dobriyan | ab61148 | 2005-07-12 12:08:43 -0700 | [diff] [blame] | 158 | __be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | { |
| 160 | struct ethhdr *eth; |
| 161 | unsigned char *rawp; |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 162 | |
Arnaldo Carvalho de Melo | 4c13eb6 | 2007-04-25 17:40:23 -0700 | [diff] [blame] | 163 | skb->dev = dev; |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 164 | skb_reset_mac_header(skb); |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 165 | skb_pull(skb, ETH_HLEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | eth = eth_hdr(skb); |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 167 | |
Eric Dumazet | 1f87e23 | 2008-11-23 23:24:32 -0800 | [diff] [blame] | 168 | if (unlikely(is_multicast_ether_addr(eth->h_dest))) { |
| 169 | if (!compare_ether_addr_64bits(eth->h_dest, dev->broadcast)) |
David S. Miller | ba645c1 | 2005-09-27 16:03:05 -0700 | [diff] [blame] | 170 | skb->pkt_type = PACKET_BROADCAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | else |
David S. Miller | ba645c1 | 2005-09-27 16:03:05 -0700 | [diff] [blame] | 172 | skb->pkt_type = PACKET_MULTICAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | } |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 174 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | /* |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 176 | * This ALLMULTI check should be redundant by 1.4 |
| 177 | * so don't forget to remove it. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | * |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 179 | * Seems, you forgot to remove it. All silly devices |
| 180 | * seems to set IFF_PROMISC. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | */ |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 182 | |
| 183 | else if (1 /*dev->flags&IFF_PROMISC */ ) { |
Eric Dumazet | 1f87e23 | 2008-11-23 23:24:32 -0800 | [diff] [blame] | 184 | if (unlikely(compare_ether_addr_64bits(eth->h_dest, dev->dev_addr))) |
David S. Miller | ba645c1 | 2005-09-27 16:03:05 -0700 | [diff] [blame] | 185 | skb->pkt_type = PACKET_OTHERHOST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 187 | |
Lennert Buytenhek | cf85d08 | 2008-10-07 13:45:02 +0000 | [diff] [blame] | 188 | /* |
| 189 | * Some variants of DSA tagging don't have an ethertype field |
| 190 | * at all, so we check here whether one of those tagging |
| 191 | * variants has been configured on the receiving interface, |
| 192 | * and if so, set skb->protocol without looking at the packet. |
| 193 | */ |
| 194 | if (netdev_uses_dsa_tags(dev)) |
| 195 | return htons(ETH_P_DSA); |
Lennert Buytenhek | 396138f | 2008-10-07 13:46:07 +0000 | [diff] [blame] | 196 | if (netdev_uses_trailer_tags(dev)) |
| 197 | return htons(ETH_P_TRAILER); |
Lennert Buytenhek | cf85d08 | 2008-10-07 13:45:02 +0000 | [diff] [blame] | 198 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | if (ntohs(eth->h_proto) >= 1536) |
| 200 | return eth->h_proto; |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 201 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | rawp = skb->data; |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 203 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | /* |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 205 | * This is a magic hack to spot IPX packets. Older Novell breaks |
| 206 | * the protocol design and runs IPX over 802.3 without an 802.2 LLC |
| 207 | * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This |
| 208 | * won't work for fault tolerant netware but does for the rest. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | */ |
| 210 | if (*(unsigned short *)rawp == 0xFFFF) |
| 211 | return htons(ETH_P_802_3); |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 212 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | /* |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 214 | * Real 802.2 LLC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | */ |
| 216 | return htons(ETH_P_802_2); |
| 217 | } |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 218 | EXPORT_SYMBOL(eth_type_trans); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
Stephen Hemminger | d3e01f7 | 2006-08-17 18:18:53 -0700 | [diff] [blame] | 220 | /** |
| 221 | * eth_header_parse - extract hardware address from packet |
| 222 | * @skb: packet to extract header from |
| 223 | * @haddr: destination buffer |
| 224 | */ |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 225 | int eth_header_parse(const struct sk_buff *skb, unsigned char *haddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | { |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 227 | const struct ethhdr *eth = eth_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | memcpy(haddr, eth->h_source, ETH_ALEN); |
| 229 | return ETH_ALEN; |
| 230 | } |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 231 | EXPORT_SYMBOL(eth_header_parse); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | |
Stephen Hemminger | d3e01f7 | 2006-08-17 18:18:53 -0700 | [diff] [blame] | 233 | /** |
| 234 | * eth_header_cache - fill cache entry from neighbour |
| 235 | * @neigh: source neighbour |
| 236 | * @hh: destination cache entry |
| 237 | * Create an Ethernet header template from the neighbour. |
| 238 | */ |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 239 | int eth_header_cache(const struct neighbour *neigh, struct hh_cache *hh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | { |
Al Viro | d77072e | 2006-09-28 14:20:34 -0700 | [diff] [blame] | 241 | __be16 type = hh->hh_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | struct ethhdr *eth; |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 243 | const struct net_device *dev = neigh->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 245 | eth = (struct ethhdr *) |
| 246 | (((u8 *) hh->hh_data) + (HH_DATA_OFF(sizeof(*eth)))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
YOSHIFUJI Hideaki | f576e24 | 2007-03-07 14:19:03 +0900 | [diff] [blame] | 248 | if (type == htons(ETH_P_802_3)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | return -1; |
| 250 | |
| 251 | eth->h_proto = type; |
Stephen Hemminger | 23f1f4e | 2007-08-24 22:35:44 -0700 | [diff] [blame] | 252 | memcpy(eth->h_source, dev->dev_addr, ETH_ALEN); |
| 253 | memcpy(eth->h_dest, neigh->ha, ETH_ALEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | hh->hh_len = ETH_HLEN; |
| 255 | return 0; |
| 256 | } |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 257 | EXPORT_SYMBOL(eth_header_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | |
Stephen Hemminger | d3e01f7 | 2006-08-17 18:18:53 -0700 | [diff] [blame] | 259 | /** |
| 260 | * eth_header_cache_update - update cache entry |
| 261 | * @hh: destination cache entry |
| 262 | * @dev: network device |
| 263 | * @haddr: new hardware address |
| 264 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | * Called by Address Resolution module to notify changes in address. |
| 266 | */ |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 267 | void eth_header_cache_update(struct hh_cache *hh, |
| 268 | const struct net_device *dev, |
| 269 | const unsigned char *haddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | { |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 271 | memcpy(((u8 *) hh->hh_data) + HH_DATA_OFF(sizeof(struct ethhdr)), |
Stephen Hemminger | 23f1f4e | 2007-08-24 22:35:44 -0700 | [diff] [blame] | 272 | haddr, ETH_ALEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | } |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 274 | EXPORT_SYMBOL(eth_header_cache_update); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | |
Stephen Hemminger | d3e01f7 | 2006-08-17 18:18:53 -0700 | [diff] [blame] | 276 | /** |
| 277 | * eth_mac_addr - set new Ethernet hardware address |
| 278 | * @dev: network device |
| 279 | * @p: socket address |
| 280 | * Change hardware address of device. |
| 281 | * |
| 282 | * This doesn't change hardware matching, so needs to be overridden |
| 283 | * for most real devices. |
| 284 | */ |
Stephen Hemminger | ccad637 | 2008-11-19 22:42:31 -0800 | [diff] [blame] | 285 | int eth_mac_addr(struct net_device *dev, void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | { |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 287 | struct sockaddr *addr = p; |
Patrick McHardy | 71bffe5 | 2007-07-11 19:41:18 -0700 | [diff] [blame] | 288 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | if (netif_running(dev)) |
| 290 | return -EBUSY; |
Patrick McHardy | 71bffe5 | 2007-07-11 19:41:18 -0700 | [diff] [blame] | 291 | if (!is_valid_ether_addr(addr->sa_data)) |
| 292 | return -EADDRNOTAVAIL; |
Stephen Hemminger | 23f1f4e | 2007-08-24 22:35:44 -0700 | [diff] [blame] | 293 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | return 0; |
| 295 | } |
Stephen Hemminger | ccad637 | 2008-11-19 22:42:31 -0800 | [diff] [blame] | 296 | EXPORT_SYMBOL(eth_mac_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | |
Stephen Hemminger | d3e01f7 | 2006-08-17 18:18:53 -0700 | [diff] [blame] | 298 | /** |
| 299 | * eth_change_mtu - set new MTU size |
| 300 | * @dev: network device |
| 301 | * @new_mtu: new Maximum Transfer Unit |
| 302 | * |
| 303 | * Allow changing MTU size. Needs to be overridden for devices |
| 304 | * supporting jumbo frames. |
| 305 | */ |
Stephen Hemminger | ccad637 | 2008-11-19 22:42:31 -0800 | [diff] [blame] | 306 | int eth_change_mtu(struct net_device *dev, int new_mtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | { |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 308 | if (new_mtu < 68 || new_mtu > ETH_DATA_LEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | return -EINVAL; |
| 310 | dev->mtu = new_mtu; |
| 311 | return 0; |
| 312 | } |
Stephen Hemminger | ccad637 | 2008-11-19 22:42:31 -0800 | [diff] [blame] | 313 | EXPORT_SYMBOL(eth_change_mtu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | |
Stephen Hemminger | ccad637 | 2008-11-19 22:42:31 -0800 | [diff] [blame] | 315 | int eth_validate_addr(struct net_device *dev) |
Jeff Garzik | bada339 | 2007-10-23 20:19:37 -0700 | [diff] [blame] | 316 | { |
| 317 | if (!is_valid_ether_addr(dev->dev_addr)) |
Patrick McHardy | 2ed9926 | 2008-04-13 22:45:40 -0700 | [diff] [blame] | 318 | return -EADDRNOTAVAIL; |
Jeff Garzik | bada339 | 2007-10-23 20:19:37 -0700 | [diff] [blame] | 319 | |
| 320 | return 0; |
| 321 | } |
Stephen Hemminger | ccad637 | 2008-11-19 22:42:31 -0800 | [diff] [blame] | 322 | EXPORT_SYMBOL(eth_validate_addr); |
Jeff Garzik | bada339 | 2007-10-23 20:19:37 -0700 | [diff] [blame] | 323 | |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 324 | const struct header_ops eth_header_ops ____cacheline_aligned = { |
| 325 | .create = eth_header, |
| 326 | .parse = eth_header_parse, |
| 327 | .rebuild = eth_rebuild_header, |
| 328 | .cache = eth_header_cache, |
| 329 | .cache_update = eth_header_cache_update, |
| 330 | }; |
| 331 | |
Stephen Hemminger | d3e01f7 | 2006-08-17 18:18:53 -0700 | [diff] [blame] | 332 | /** |
| 333 | * ether_setup - setup Ethernet network device |
| 334 | * @dev: network device |
| 335 | * Fill in the fields of the device structure with Ethernet-generic values. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | */ |
| 337 | void ether_setup(struct net_device *dev) |
| 338 | { |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 339 | dev->header_ops = ð_header_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | dev->type = ARPHRD_ETHER; |
| 341 | dev->hard_header_len = ETH_HLEN; |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 342 | dev->mtu = ETH_DATA_LEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | dev->addr_len = ETH_ALEN; |
YOSHIFUJI Hideaki | 03d52d7 | 2007-02-09 23:24:44 +0900 | [diff] [blame] | 344 | dev->tx_queue_len = 1000; /* Ethernet wants good queues */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | dev->flags = IFF_BROADCAST|IFF_MULTICAST; |
YOSHIFUJI Hideaki | 03d52d7 | 2007-02-09 23:24:44 +0900 | [diff] [blame] | 346 | |
Stephen Hemminger | 2e4ca75 | 2006-08-17 18:20:18 -0700 | [diff] [blame] | 347 | memset(dev->broadcast, 0xFF, ETH_ALEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | |
| 349 | } |
| 350 | EXPORT_SYMBOL(ether_setup); |
| 351 | |
| 352 | /** |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 353 | * alloc_etherdev_mq - Allocates and sets up an Ethernet device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | * @sizeof_priv: Size of additional driver-private structure to be allocated |
Stephen Hemminger | d3e01f7 | 2006-08-17 18:18:53 -0700 | [diff] [blame] | 355 | * for this Ethernet device |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 356 | * @queue_count: The number of queues this device has. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | * |
Stephen Hemminger | d3e01f7 | 2006-08-17 18:18:53 -0700 | [diff] [blame] | 358 | * Fill in the fields of the device structure with Ethernet-generic |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | * values. Basically does everything except registering the device. |
| 360 | * |
| 361 | * Constructs a new net device, complete with a private data area of |
Stephen Hemminger | d3e01f7 | 2006-08-17 18:18:53 -0700 | [diff] [blame] | 362 | * size (sizeof_priv). A 32-byte (not bit) alignment is enforced for |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | * this private data area. |
| 364 | */ |
| 365 | |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 366 | struct net_device *alloc_etherdev_mq(int sizeof_priv, unsigned int queue_count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | { |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 368 | return alloc_netdev_mq(sizeof_priv, "eth%d", ether_setup, queue_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | } |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 370 | EXPORT_SYMBOL(alloc_etherdev_mq); |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 371 | |
Michael Chan | 7ffc49a | 2007-12-24 21:28:09 -0800 | [diff] [blame] | 372 | static size_t _format_mac_addr(char *buf, int buflen, |
| 373 | const unsigned char *addr, int len) |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 374 | { |
Michael Chan | 7ffc49a | 2007-12-24 21:28:09 -0800 | [diff] [blame] | 375 | int i; |
| 376 | char *cp = buf; |
| 377 | |
| 378 | for (i = 0; i < len; i++) { |
| 379 | cp += scnprintf(cp, buflen - (cp - buf), "%02x", addr[i]); |
| 380 | if (i == len - 1) |
| 381 | break; |
| 382 | cp += strlcpy(cp, ":", buflen - (cp - buf)); |
| 383 | } |
| 384 | return cp - buf; |
| 385 | } |
| 386 | |
| 387 | ssize_t sysfs_format_mac(char *buf, const unsigned char *addr, int len) |
| 388 | { |
| 389 | size_t l; |
| 390 | |
| 391 | l = _format_mac_addr(buf, PAGE_SIZE, addr, len); |
| 392 | l += strlcpy(buf + l, "\n", PAGE_SIZE - l); |
| 393 | return ((ssize_t) l); |
| 394 | } |
| 395 | EXPORT_SYMBOL(sysfs_format_mac); |