net/batman-adv/soft-interface.c

   1 /*
   2  * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
   3  *
   4  * Marek Lindner, Simon Wunderlich
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of version 2 of the GNU General Public
   8  * License as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18  * 02110-1301, USA
  19  *
  20  */
  21
  22 #include "main.h"
  23 #include "soft-interface.h"
  24 #include "hard-interface.h"
  25 #include "routing.h"
  26 #include "send.h"
  27 #include "bat_debugfs.h"
  28 #include "translation-table.h"
  29 #include "hash.h"
  30 #include "gateway_common.h"
  31 #include "gateway_client.h"
  32 #include "bat_sysfs.h"
  33 #include <linux/slab.h>
  34 #include <linux/ethtool.h>
  35 #include <linux/etherdevice.h>
  36 #include <linux/if_vlan.h>
  37 #include "unicast.h"
  38
  39
  40 static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
  41 static void bat_get_drvinfo(struct net_device *dev,
  42                             struct ethtool_drvinfo *info);
  43 static u32 bat_get_msglevel(struct net_device *dev);
  44 static void bat_set_msglevel(struct net_device *dev, u32 value);
  45 static u32 bat_get_link(struct net_device *dev);
  46 static u32 bat_get_rx_csum(struct net_device *dev);
  47 static int bat_set_rx_csum(struct net_device *dev, u32 data);
  48
  49 static const struct ethtool_ops bat_ethtool_ops = {
  50         .get_settings = bat_get_settings,
  51         .get_drvinfo = bat_get_drvinfo,
  52         .get_msglevel = bat_get_msglevel,
  53         .set_msglevel = bat_set_msglevel,
  54         .get_link = bat_get_link,
  55         .get_rx_csum = bat_get_rx_csum,
  56         .set_rx_csum = bat_set_rx_csum
  57 };
  58
  59 int my_skb_head_push(struct sk_buff *skb, unsigned int len)
  60 {
  61         int result;
  62
  63         /**
  64          * TODO: We must check if we can release all references to non-payload
  65          * data using skb_header_release in our skbs to allow skb_cow_header to
  66          * work optimally. This means that those skbs are not allowed to read
  67          * or write any data which is before the current position of skb->data
  68          * after that call and thus allow other skbs with the same data buffer
  69          * to write freely in that area.
  70          */
  71         result = skb_cow_head(skb, len);
  72         if (result < 0)
  73                 return result;
  74
  75         skb_push(skb, len);
  76         return 0;
  77 }
  78
  79 static void softif_neigh_free_rcu(struct rcu_head *rcu)
  80 {
  81         struct softif_neigh *softif_neigh;
  82
  83         softif_neigh = container_of(rcu, struct softif_neigh, rcu);
  84         kfree(softif_neigh);
  85 }
  86
  87 static void softif_neigh_free_ref(struct softif_neigh *softif_neigh)
  88 {
  89         if (atomic_dec_and_test(&softif_neigh->refcount))
  90                 call_rcu(&softif_neigh->rcu, softif_neigh_free_rcu);
  91 }
  92
  93 void softif_neigh_purge(struct bat_priv *bat_priv)
  94 {
  95         struct softif_neigh *softif_neigh, *softif_neigh_tmp;
  96         struct hlist_node *node, *node_tmp;
  97
  98         spin_lock_bh(&bat_priv->softif_neigh_lock);
  99
 100         hlist_for_each_entry_safe(softif_neigh, node, node_tmp,
 101                                   &bat_priv->softif_neigh_list, list) {
 102
 103                 if ((!time_after(jiffies, softif_neigh->last_seen +
 104                                 msecs_to_jiffies(SOFTIF_NEIGH_TIMEOUT))) &&
 105                     (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE))
 106                         continue;
 107
 108                 hlist_del_rcu(&softif_neigh->list);
 109
 110                 if (bat_priv->softif_neigh == softif_neigh) {
 111                         bat_dbg(DBG_ROUTES, bat_priv,
 112                                  "Current mesh exit point '%pM' vanished "
 113                                  "(vid: %d).\n",
 114                                  softif_neigh->addr, softif_neigh->vid);
 115                         softif_neigh_tmp = bat_priv->softif_neigh;
 116                         bat_priv->softif_neigh = NULL;
 117                         softif_neigh_free_ref(softif_neigh_tmp);
 118                 }
 119
 120                 softif_neigh_free_ref(softif_neigh);
 121         }
 122
 123         spin_unlock_bh(&bat_priv->softif_neigh_lock);
 124 }
 125
 126 static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv,
 127                                              uint8_t *addr, short vid)
 128 {
 129         struct softif_neigh *softif_neigh;
 130         struct hlist_node *node;
 131
 132         rcu_read_lock();
 133         hlist_for_each_entry_rcu(softif_neigh, node,
 134                                  &bat_priv->softif_neigh_list, list) {
 135                 if (!compare_eth(softif_neigh->addr, addr))
 136                         continue;
 137
 138                 if (softif_neigh->vid != vid)
 139                         continue;
 140
 141                 if (!atomic_inc_not_zero(&softif_neigh->refcount))
 142                         continue;
 143
 144                 softif_neigh->last_seen = jiffies;
 145                 goto out;
 146         }
 147
 148         softif_neigh = kzalloc(sizeof(struct softif_neigh), GFP_ATOMIC);
 149         if (!softif_neigh)
 150                 goto out;
 151
 152         memcpy(softif_neigh->addr, addr, ETH_ALEN);
 153         softif_neigh->vid = vid;
 154         softif_neigh->last_seen = jiffies;
 155         /* initialize with 2 - caller decrements counter by one */
 156         atomic_set(&softif_neigh->refcount, 2);
 157
 158         INIT_HLIST_NODE(&softif_neigh->list);
 159         spin_lock_bh(&bat_priv->softif_neigh_lock);
 160         hlist_add_head_rcu(&softif_neigh->list, &bat_priv->softif_neigh_list);
 161         spin_unlock_bh(&bat_priv->softif_neigh_lock);
 162
 163 out:
 164         rcu_read_unlock();
 165         return softif_neigh;
 166 }
 167
 168 int softif_neigh_seq_print_text(struct seq_file *seq, void *offset)
 169 {
 170         struct net_device *net_dev = (struct net_device *)seq->private;
 171         struct bat_priv *bat_priv = netdev_priv(net_dev);
 172         struct softif_neigh *softif_neigh;
 173         struct hlist_node *node;
 174
 175         if (!bat_priv->primary_if) {
 176                 return seq_printf(seq, "BATMAN mesh %s disabled - "
 177                                "please specify interfaces to enable it\n",
 178                                net_dev->name);
 179         }
 180
 181         seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name);
 182
 183         rcu_read_lock();
 184         hlist_for_each_entry_rcu(softif_neigh, node,
 185                                  &bat_priv->softif_neigh_list, list)
 186                 seq_printf(seq, "%s %pM (vid: %d)\n",
 187                                 bat_priv->softif_neigh == softif_neigh
 188                                 ? "=>" : "  ", softif_neigh->addr,
 189                                 softif_neigh->vid);
 190         rcu_read_unlock();
 191
 192         return 0;
 193 }
 194
 195 static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
 196                                short vid)
 197 {
 198         struct bat_priv *bat_priv = netdev_priv(dev);
 199         struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
 200         struct batman_packet *batman_packet;
 201         struct softif_neigh *softif_neigh, *softif_neigh_tmp;
 202
 203         if (ntohs(ethhdr->h_proto) == ETH_P_8021Q)
 204                 batman_packet = (struct batman_packet *)
 205                                         (skb->data + ETH_HLEN + VLAN_HLEN);
 206         else
 207                 batman_packet = (struct batman_packet *)(skb->data + ETH_HLEN);
 208
 209         if (batman_packet->version != COMPAT_VERSION)
 210                 goto err;
 211
 212         if (batman_packet->packet_type != BAT_PACKET)
 213                 goto err;
 214
 215         if (!(batman_packet->flags & PRIMARIES_FIRST_HOP))
 216                 goto err;
 217
 218         if (is_my_mac(batman_packet->orig))
 219                 goto err;
 220
 221         softif_neigh = softif_neigh_get(bat_priv, batman_packet->orig, vid);
 222
 223         if (!softif_neigh)
 224                 goto err;
 225
 226         if (bat_priv->softif_neigh == softif_neigh)
 227                 goto out;
 228
 229         /* we got a neighbor but its mac is 'bigger' than ours  */
 230         if (memcmp(bat_priv->primary_if->net_dev->dev_addr,
 231                    softif_neigh->addr, ETH_ALEN) < 0)
 232                 goto out;
 233
 234         /* switch to new 'smallest neighbor' */
 235         if ((bat_priv->softif_neigh) &&
 236             (memcmp(softif_neigh->addr, bat_priv->softif_neigh->addr,
 237                                                         ETH_ALEN) < 0)) {
 238                 bat_dbg(DBG_ROUTES, bat_priv,
 239                         "Changing mesh exit point from %pM (vid: %d) "
 240                         "to %pM (vid: %d).\n",
 241                          bat_priv->softif_neigh->addr,
 242                          bat_priv->softif_neigh->vid,
 243                          softif_neigh->addr, softif_neigh->vid);
 244                 softif_neigh_tmp = bat_priv->softif_neigh;
 245                 bat_priv->softif_neigh = softif_neigh;
 246                 softif_neigh_free_ref(softif_neigh_tmp);
 247                 /* we need to hold the additional reference */
 248                 goto err;
 249         }
 250
 251         /* close own batX device and use softif_neigh as exit node */
 252         if ((!bat_priv->softif_neigh) &&
 253             (memcmp(softif_neigh->addr,
 254                     bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN) < 0)) {
 255                 bat_dbg(DBG_ROUTES, bat_priv,
 256                         "Setting mesh exit point to %pM (vid: %d).\n",
 257                         softif_neigh->addr, softif_neigh->vid);
 258                 bat_priv->softif_neigh = softif_neigh;
 259                 /* we need to hold the additional reference */
 260                 goto err;
 261         }
 262
 263 out:
 264         softif_neigh_free_ref(softif_neigh);
 265 err:
 266         kfree_skb(skb);
 267         return;
 268 }
 269
 270 static int interface_open(struct net_device *dev)
 271 {
 272         netif_start_queue(dev);
 273         return 0;
 274 }
 275
 276 static int interface_release(struct net_device *dev)
 277 {
 278         netif_stop_queue(dev);
 279         return 0;
 280 }
 281
 282 static struct net_device_stats *interface_stats(struct net_device *dev)
 283 {
 284         struct bat_priv *bat_priv = netdev_priv(dev);
 285         return &bat_priv->stats;
 286 }
 287
 288 static int interface_set_mac_addr(struct net_device *dev, void *p)
 289 {
 290         struct bat_priv *bat_priv = netdev_priv(dev);
 291         struct sockaddr *addr = p;
 292
 293         if (!is_valid_ether_addr(addr->sa_data))
 294                 return -EADDRNOTAVAIL;
 295
 296         /* only modify hna-table if it has been initialised before */
 297         if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) {
 298                 hna_local_remove(bat_priv, dev->dev_addr,
 299                                  "mac address changed");
 300                 hna_local_add(dev, addr->sa_data);
 301         }
 302
 303         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
 304         return 0;
 305 }
 306
 307 static int interface_change_mtu(struct net_device *dev, int new_mtu)
 308 {
 309         /* check ranges */
 310         if ((new_mtu < 68) || (new_mtu > hardif_min_mtu(dev)))
 311                 return -EINVAL;
 312
 313         dev->mtu = new_mtu;
 314
 315         return 0;
 316 }
 317
 318 int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
 319 {
 320         struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
 321         struct bat_priv *bat_priv = netdev_priv(soft_iface);
 322         struct bcast_packet *bcast_packet;
 323         struct vlan_ethhdr *vhdr;
 324         int data_len = skb->len, ret;
 325         short vid = -1;
 326         bool do_bcast = false;
 327
 328         if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
 329                 goto dropped;
 330
 331         soft_iface->trans_start = jiffies;
 332
 333         switch (ntohs(ethhdr->h_proto)) {
 334         case ETH_P_8021Q:
 335                 vhdr = (struct vlan_ethhdr *)skb->data;
 336                 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
 337
 338                 if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
 339                         break;
 340
 341                 /* fall through */
 342         case ETH_P_BATMAN:
 343                 softif_batman_recv(skb, soft_iface, vid);
 344                 goto end;
 345         }
 346
 347         /**
 348          * if we have a another chosen mesh exit node in range
 349          * it will transport the packets to the mesh
 350          */
 351         if ((bat_priv->softif_neigh) && (bat_priv->softif_neigh->vid == vid))
 352                 goto dropped;
 353
 354         /* TODO: check this for locks */
 355         hna_local_add(soft_iface, ethhdr->h_source);
 356
 357         if (is_multicast_ether_addr(ethhdr->h_dest)) {
 358                 ret = gw_is_target(bat_priv, skb);
 359
 360                 if (ret < 0)
 361                         goto dropped;
 362
 363                 if (ret == 0)
 364                         do_bcast = true;
 365         }
 366
 367         /* ethernet packet should be broadcasted */
 368         if (do_bcast) {
 369                 if (!bat_priv->primary_if)
 370                         goto dropped;
 371
 372                 if (my_skb_head_push(skb, sizeof(struct bcast_packet)) < 0)
 373                         goto dropped;
 374
 375                 bcast_packet = (struct bcast_packet *)skb->data;
 376                 bcast_packet->version = COMPAT_VERSION;
 377                 bcast_packet->ttl = TTL;
 378
 379                 /* batman packet type: broadcast */
 380                 bcast_packet->packet_type = BAT_BCAST;
 381
 382                 /* hw address of first interface is the orig mac because only
 383                  * this mac is known throughout the mesh */
 384                 memcpy(bcast_packet->orig,
 385                        bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
 386
 387                 /* set broadcast sequence number */
 388                 bcast_packet->seqno =
 389                         htonl(atomic_inc_return(&bat_priv->bcast_seqno));
 390
 391                 add_bcast_packet_to_list(bat_priv, skb);
 392
 393                 /* a copy is stored in the bcast list, therefore removing
 394                  * the original skb. */
 395                 kfree_skb(skb);
 396
 397         /* unicast packet */
 398         } else {
 399                 ret = unicast_send_skb(skb, bat_priv);
 400                 if (ret != 0)
 401                         goto dropped_freed;
 402         }
 403
 404         bat_priv->stats.tx_packets++;
 405         bat_priv->stats.tx_bytes += data_len;
 406         goto end;
 407
 408 dropped:
 409         kfree_skb(skb);
 410 dropped_freed:
 411         bat_priv->stats.tx_dropped++;
 412 end:
 413         return NETDEV_TX_OK;
 414 }
 415
 416 void interface_rx(struct net_device *soft_iface,
 417                   struct sk_buff *skb, struct hard_iface *recv_if,
 418                   int hdr_size)
 419 {
 420         struct bat_priv *bat_priv = netdev_priv(soft_iface);
 421         struct unicast_packet *unicast_packet;
 422         struct ethhdr *ethhdr;
 423         struct vlan_ethhdr *vhdr;
 424         short vid = -1;
 425         int ret;
 426
 427         /* check if enough space is available for pulling, and pull */
 428         if (!pskb_may_pull(skb, hdr_size))
 429                 goto dropped;
 430
 431         skb_pull_rcsum(skb, hdr_size);
 432         skb_reset_mac_header(skb);
 433
 434         ethhdr = (struct ethhdr *)skb_mac_header(skb);
 435
 436         switch (ntohs(ethhdr->h_proto)) {
 437         case ETH_P_8021Q:
 438                 vhdr = (struct vlan_ethhdr *)skb->data;
 439                 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
 440
 441                 if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
 442                         break;
 443
 444                 /* fall through */
 445         case ETH_P_BATMAN:
 446                 goto dropped;
 447         }
 448
 449         /**
 450          * if we have a another chosen mesh exit node in range
 451          * it will transport the packets to the non-mesh network
 452          */
 453         if ((bat_priv->softif_neigh) && (bat_priv->softif_neigh->vid == vid)) {
 454                 skb_push(skb, hdr_size);
 455                 unicast_packet = (struct unicast_packet *)skb->data;
 456
 457                 if ((unicast_packet->packet_type != BAT_UNICAST) &&
 458                     (unicast_packet->packet_type != BAT_UNICAST_FRAG))
 459                         goto dropped;
 460
 461                 skb_reset_mac_header(skb);
 462
 463                 memcpy(unicast_packet->dest,
 464                        bat_priv->softif_neigh->addr, ETH_ALEN);
 465                 ret = route_unicast_packet(skb, recv_if);
 466                 if (ret == NET_RX_DROP)
 467                         goto dropped;
 468
 469                 goto out;
 470         }
 471
 472         /* skb->dev & skb->pkt_type are set here */
 473         if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
 474                 goto dropped;
 475         skb->protocol = eth_type_trans(skb, soft_iface);
 476
 477         /* should not be necessary anymore as we use skb_pull_rcsum()
 478          * TODO: please verify this and remove this TODO
 479          * -- Dec 21st 2009, Simon Wunderlich */
 480
 481 /*      skb->ip_summed = CHECKSUM_UNNECESSARY;*/
 482
 483         bat_priv->stats.rx_packets++;
 484         bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
 485
 486         soft_iface->last_rx = jiffies;
 487
 488         netif_rx(skb);
 489         return;
 490
 491 dropped:
 492         kfree_skb(skb);
 493 out:
 494         return;
 495 }
 496
 497 #ifdef HAVE_NET_DEVICE_OPS
 498 static const struct net_device_ops bat_netdev_ops = {
 499         .ndo_open = interface_open,
 500         .ndo_stop = interface_release,
 501         .ndo_get_stats = interface_stats,
 502         .ndo_set_mac_address = interface_set_mac_addr,
 503         .ndo_change_mtu = interface_change_mtu,
 504         .ndo_start_xmit = interface_tx,
 505         .ndo_validate_addr = eth_validate_addr
 506 };
 507 #endif
 508
 509 static void interface_setup(struct net_device *dev)
 510 {
 511         struct bat_priv *priv = netdev_priv(dev);
 512         char dev_addr[ETH_ALEN];
 513
 514         ether_setup(dev);
 515
 516 #ifdef HAVE_NET_DEVICE_OPS
 517         dev->netdev_ops = &bat_netdev_ops;
 518 #else
 519         dev->open = interface_open;
 520         dev->stop = interface_release;
 521         dev->get_stats = interface_stats;
 522         dev->set_mac_address = interface_set_mac_addr;
 523         dev->change_mtu = interface_change_mtu;
 524         dev->hard_start_xmit = interface_tx;
 525 #endif
 526         dev->destructor = free_netdev;
 527
 528         /**
 529          * can't call min_mtu, because the needed variables
 530          * have not been initialized yet
 531          */
 532         dev->mtu = ETH_DATA_LEN;
 533         dev->hard_header_len = BAT_HEADER_LEN; /* reserve more space in the
 534                                                 * skbuff for our header */
 535
 536         /* generate random address */
 537         random_ether_addr(dev_addr);
 538         memcpy(dev->dev_addr, dev_addr, ETH_ALEN);
 539
 540         SET_ETHTOOL_OPS(dev, &bat_ethtool_ops);
 541
 542         memset(priv, 0, sizeof(struct bat_priv));
 543 }
 544
 545 struct net_device *softif_create(char *name)
 546 {
 547         struct net_device *soft_iface;
 548         struct bat_priv *bat_priv;
 549         int ret;
 550
 551         soft_iface = alloc_netdev(sizeof(struct bat_priv) , name,
 552                                    interface_setup);
 553
 554         if (!soft_iface) {
 555                 pr_err("Unable to allocate the batman interface: %s\n", name);
 556                 goto out;
 557         }
 558
 559         ret = register_netdev(soft_iface);
 560         if (ret < 0) {
 561                 pr_err("Unable to register the batman interface '%s': %i\n",
 562                        name, ret);
 563                 goto free_soft_iface;
 564         }
 565
 566         bat_priv = netdev_priv(soft_iface);
 567
 568         atomic_set(&bat_priv->aggregated_ogms, 1);
 569         atomic_set(&bat_priv->bonding, 0);
 570         atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE);
 571         atomic_set(&bat_priv->gw_mode, GW_MODE_OFF);
 572         atomic_set(&bat_priv->gw_sel_class, 20);
 573         atomic_set(&bat_priv->gw_bandwidth, 41);
 574         atomic_set(&bat_priv->orig_interval, 1000);
 575         atomic_set(&bat_priv->hop_penalty, 10);
 576         atomic_set(&bat_priv->log_level, 0);
 577         atomic_set(&bat_priv->fragmentation, 1);
 578         atomic_set(&bat_priv->bcast_queue_left, BCAST_QUEUE_LEN);
 579         atomic_set(&bat_priv->batman_queue_left, BATMAN_QUEUE_LEN);
 580
 581         atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
 582         atomic_set(&bat_priv->bcast_seqno, 1);
 583         atomic_set(&bat_priv->hna_local_changed, 0);
 584
 585         bat_priv->primary_if = NULL;
 586         bat_priv->num_ifaces = 0;
 587         bat_priv->softif_neigh = NULL;
 588
 589         ret = sysfs_add_meshif(soft_iface);
 590         if (ret < 0)
 591                 goto unreg_soft_iface;
 592
 593         ret = debugfs_add_meshif(soft_iface);
 594         if (ret < 0)
 595                 goto unreg_sysfs;
 596
 597         ret = mesh_init(soft_iface);
 598         if (ret < 0)
 599                 goto unreg_debugfs;
 600
 601         return soft_iface;
 602
 603 unreg_debugfs:
 604         debugfs_del_meshif(soft_iface);
 605 unreg_sysfs:
 606         sysfs_del_meshif(soft_iface);
 607 unreg_soft_iface:
 608         unregister_netdev(soft_iface);
 609         return NULL;
 610
 611 free_soft_iface:
 612         free_netdev(soft_iface);
 613 out:
 614         return NULL;
 615 }
 616
 617 void softif_destroy(struct net_device *soft_iface)
 618 {
 619         debugfs_del_meshif(soft_iface);
 620         sysfs_del_meshif(soft_iface);
 621         mesh_free(soft_iface);
 622         unregister_netdevice(soft_iface);
 623 }
 624
 625 int softif_is_valid(struct net_device *net_dev)
 626 {
 627 #ifdef HAVE_NET_DEVICE_OPS
 628         if (net_dev->netdev_ops->ndo_start_xmit == interface_tx)
 629                 return 1;
 630 #else
 631         if (net_dev->hard_start_xmit == interface_tx)
 632                 return 1;
 633 #endif
 634
 635         return 0;
 636 }
 637
 638 /* ethtool */
 639 static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 640 {
 641         cmd->supported = 0;
 642         cmd->advertising = 0;
 643         cmd->speed = SPEED_10;
 644         cmd->duplex = DUPLEX_FULL;
 645         cmd->port = PORT_TP;
 646         cmd->phy_address = 0;
 647         cmd->transceiver = XCVR_INTERNAL;
 648         cmd->autoneg = AUTONEG_DISABLE;
 649         cmd->maxtxpkt = 0;
 650         cmd->maxrxpkt = 0;
 651
 652         return 0;
 653 }
 654
 655 static void bat_get_drvinfo(struct net_device *dev,
 656                             struct ethtool_drvinfo *info)
 657 {
 658         strcpy(info->driver, "B.A.T.M.A.N. advanced");
 659         strcpy(info->version, SOURCE_VERSION);
 660         strcpy(info->fw_version, "N/A");
 661         strcpy(info->bus_info, "batman");
 662 }
 663
 664 static u32 bat_get_msglevel(struct net_device *dev)
 665 {
 666         return -EOPNOTSUPP;
 667 }
 668
 669 static void bat_set_msglevel(struct net_device *dev, u32 value)
 670 {
 671 }
 672
 673 static u32 bat_get_link(struct net_device *dev)
 674 {
 675         return 1;
 676 }
 677
 678 static u32 bat_get_rx_csum(struct net_device *dev)
 679 {
 680         return 0;
 681 }
 682
 683 static int bat_set_rx_csum(struct net_device *dev, u32 data)
 684 {
 685         return -EOPNOTSUPP;
 686 }