net/batman-adv/soft-interface.c

   1 /*
   2  * Copyright (C) 2007-2010 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 "types.h"
  30 #include "hash.h"
  31 #include "gateway_common.h"
  32 #include "gateway_client.h"
  33 #include "send.h"
  34 #include "bat_sysfs.h"
  35 #include <linux/slab.h>
  36 #include <linux/ethtool.h>
  37 #include <linux/etherdevice.h>
  38 #include <linux/if_vlan.h>
  39 #include "unicast.h"
  40 #include "routing.h"
  41
  42
  43 static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
  44 static void bat_get_drvinfo(struct net_device *dev,
  45                             struct ethtool_drvinfo *info);
  46 static u32 bat_get_msglevel(struct net_device *dev);
  47 static void bat_set_msglevel(struct net_device *dev, u32 value);
  48 static u32 bat_get_link(struct net_device *dev);
  49 static u32 bat_get_rx_csum(struct net_device *dev);
  50 static int bat_set_rx_csum(struct net_device *dev, u32 data);
  51
  52 static const struct ethtool_ops bat_ethtool_ops = {
  53         .get_settings = bat_get_settings,
  54         .get_drvinfo = bat_get_drvinfo,
  55         .get_msglevel = bat_get_msglevel,
  56         .set_msglevel = bat_set_msglevel,
  57         .get_link = bat_get_link,
  58         .get_rx_csum = bat_get_rx_csum,
  59         .set_rx_csum = bat_set_rx_csum
  60 };
  61
  62 int my_skb_head_push(struct sk_buff *skb, unsigned int len)
  63 {
  64         int result;
  65
  66         /**
  67          * TODO: We must check if we can release all references to non-payload
  68          * data using skb_header_release in our skbs to allow skb_cow_header to
  69          * work optimally. This means that those skbs are not allowed to read
  70          * or write any data which is before the current position of skb->data
  71          * after that call and thus allow other skbs with the same data buffer
  72          * to write freely in that area.
  73          */
  74         result = skb_cow_head(skb, len);
  75         if (result < 0)
  76                 return result;
  77
  78         skb_push(skb, len);
  79         return 0;
  80 }
  81
  82 static void softif_neigh_free_ref(struct kref *refcount)
  83 {
  84         struct softif_neigh *softif_neigh;
  85
  86         softif_neigh = container_of(refcount, struct softif_neigh, refcount);
  87         kfree(softif_neigh);
  88 }
  89
  90 static void softif_neigh_free_rcu(struct rcu_head *rcu)
  91 {
  92         struct softif_neigh *softif_neigh;
  93
  94         softif_neigh = container_of(rcu, struct softif_neigh, rcu);
  95         kref_put(&softif_neigh->refcount, softif_neigh_free_ref);
  96 }
  97
  98 void softif_neigh_purge(struct bat_priv *bat_priv)
  99 {
 100         struct softif_neigh *softif_neigh, *softif_neigh_tmp;
 101         struct hlist_node *node, *node_tmp;
 102
 103         spin_lock_bh(&bat_priv->softif_neigh_lock);
 104
 105         hlist_for_each_entry_safe(softif_neigh, node, node_tmp,
 106                                   &bat_priv->softif_neigh_list, list) {
 107
 108                 if ((!time_after(jiffies, softif_neigh->last_seen +
 109                                 msecs_to_jiffies(SOFTIF_NEIGH_TIMEOUT))) &&
 110                     (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE))
 111                         continue;
 112
 113                 hlist_del_rcu(&softif_neigh->list);
 114
 115                 if (bat_priv->softif_neigh == softif_neigh) {
 116                         bat_dbg(DBG_ROUTES, bat_priv,
 117                                  "Current mesh exit point '%pM' vanished "
 118                                  "(vid: %d).\n",
 119                                  softif_neigh->addr, softif_neigh->vid);
 120                         softif_neigh_tmp = bat_priv->softif_neigh;
 121                         bat_priv->softif_neigh = NULL;
 122                         kref_put(&softif_neigh_tmp->refcount,
 123                                  softif_neigh_free_ref);
 124                 }
 125
 126                 call_rcu(&softif_neigh->rcu, softif_neigh_free_rcu);
 127         }
 128
 129         spin_unlock_bh(&bat_priv->softif_neigh_lock);
 130 }
 131
 132 static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv,
 133                                              uint8_t *addr, short vid)
 134 {
 135         struct softif_neigh *softif_neigh;
 136         struct hlist_node *node;
 137
 138         rcu_read_lock();
 139         hlist_for_each_entry_rcu(softif_neigh, node,
 140                                  &bat_priv->softif_neigh_list, list) {
 141                 if (memcmp(softif_neigh->addr, addr, ETH_ALEN) != 0)
 142                         continue;
 143
 144                 if (softif_neigh->vid != vid)
 145                         continue;
 146
 147                 softif_neigh->last_seen = jiffies;
 148                 goto found;
 149         }
 150
 151         softif_neigh = kzalloc(sizeof(struct softif_neigh), GFP_ATOMIC);
 152         if (!softif_neigh)
 153                 goto out;
 154
 155         memcpy(softif_neigh->addr, addr, ETH_ALEN);
 156         softif_neigh->vid = vid;
 157         softif_neigh->last_seen = jiffies;
 158         kref_init(&softif_neigh->refcount);
 159
 160         INIT_HLIST_NODE(&softif_neigh->list);
 161         spin_lock_bh(&bat_priv->softif_neigh_lock);
 162         hlist_add_head_rcu(&softif_neigh->list, &bat_priv->softif_neigh_list);
 163         spin_unlock_bh(&bat_priv->softif_neigh_lock);
 164
 165 found:
 166         kref_get(&softif_neigh->refcount);
 167 out:
 168         rcu_read_unlock();
 169         return softif_neigh;
 170 }
 171
 172 int softif_neigh_seq_print_text(struct seq_file *seq, void *offset)
 173 {
 174         struct net_device *net_dev = (struct net_device *)seq->private;
 175         struct bat_priv *bat_priv = netdev_priv(net_dev);
 176         struct softif_neigh *softif_neigh;
 177         struct hlist_node *node;
 178         size_t buf_size, pos;
 179         char *buff;
 180
 181         if (!bat_priv->primary_if) {
 182                 return seq_printf(seq, "BATMAN mesh %s disabled - "
 183                                "please specify interfaces to enable it\n",
 184                                net_dev->name);
 185         }
 186
 187         seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name);
 188
 189         buf_size = 1;
 190         /* Estimate length for: "   xx:xx:xx:xx:xx:xx\n" */
 191         rcu_read_lock();
 192         hlist_for_each_entry_rcu(softif_neigh, node,
 193                                  &bat_priv->softif_neigh_list, list)
 194                 buf_size += 30;
 195         rcu_read_unlock();
 196
 197         buff = kmalloc(buf_size, GFP_ATOMIC);
 198         if (!buff)
 199                 return -ENOMEM;
 200
 201         buff[0] = '\0';
 202         pos = 0;
 203
 204         rcu_read_lock();
 205         hlist_for_each_entry_rcu(softif_neigh, node,
 206                                  &bat_priv->softif_neigh_list, list) {
 207                 pos += snprintf(buff + pos, 31, "%s %pM (vid: %d)\n",
 208                                 bat_priv->softif_neigh == softif_neigh
 209                                 ? "=>" : "  ", softif_neigh->addr,
 210                                 softif_neigh->vid);
 211         }
 212         rcu_read_unlock();
 213
 214         seq_printf(seq, "%s", buff);
 215         kfree(buff);
 216         return 0;
 217 }
 218
 219 static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
 220                                short vid)
 221 {
 222         struct bat_priv *bat_priv = netdev_priv(dev);
 223         struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
 224         struct batman_packet *batman_packet;
 225         struct softif_neigh *softif_neigh, *softif_neigh_tmp;
 226
 227         if (ntohs(ethhdr->h_proto) == ETH_P_8021Q)
 228                 batman_packet = (struct batman_packet *)
 229                                         (skb->data + ETH_HLEN + VLAN_HLEN);
 230         else
 231                 batman_packet = (struct batman_packet *)(skb->data + ETH_HLEN);
 232
 233         if (batman_packet->version != COMPAT_VERSION)
 234                 goto err;
 235
 236         if (batman_packet->packet_type != BAT_PACKET)
 237                 goto err;
 238
 239         if (!(batman_packet->flags & PRIMARIES_FIRST_HOP))
 240                 goto err;
 241
 242         if (is_my_mac(batman_packet->orig))
 243                 goto err;
 244
 245         softif_neigh = softif_neigh_get(bat_priv, batman_packet->orig, vid);
 246
 247         if (!softif_neigh)
 248                 goto err;
 249
 250         if (bat_priv->softif_neigh == softif_neigh)
 251                 goto out;
 252
 253         /* we got a neighbor but its mac is 'bigger' than ours  */
 254         if (memcmp(bat_priv->primary_if->net_dev->dev_addr,
 255                    softif_neigh->addr, ETH_ALEN) < 0)
 256                 goto out;
 257
 258         /* switch to new 'smallest neighbor' */
 259         if ((bat_priv->softif_neigh) &&
 260             (memcmp(softif_neigh->addr, bat_priv->softif_neigh->addr,
 261                                                         ETH_ALEN) < 0)) {
 262                 bat_dbg(DBG_ROUTES, bat_priv,
 263                         "Changing mesh exit point from %pM (vid: %d) "
 264                         "to %pM (vid: %d).\n",
 265                          bat_priv->softif_neigh->addr,
 266                          bat_priv->softif_neigh->vid,
 267                          softif_neigh->addr, softif_neigh->vid);
 268                 softif_neigh_tmp = bat_priv->softif_neigh;
 269                 bat_priv->softif_neigh = softif_neigh;
 270                 kref_put(&softif_neigh_tmp->refcount, softif_neigh_free_ref);
 271                 /* we need to hold the additional reference */
 272                 goto err;
 273         }
 274
 275         /* close own batX device and use softif_neigh as exit node */
 276         if ((!bat_priv->softif_neigh) &&
 277             (memcmp(softif_neigh->addr,
 278                     bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN) < 0)) {
 279                 bat_dbg(DBG_ROUTES, bat_priv,
 280                         "Setting mesh exit point to %pM (vid: %d).\n",
 281                         softif_neigh->addr, softif_neigh->vid);
 282                 bat_priv->softif_neigh = softif_neigh;
 283                 /* we need to hold the additional reference */
 284                 goto err;
 285         }
 286
 287 out:
 288         kref_put(&softif_neigh->refcount, softif_neigh_free_ref);
 289 err:
 290         kfree_skb(skb);
 291         return;
 292 }
 293
 294 static int interface_open(struct net_device *dev)
 295 {
 296         netif_start_queue(dev);
 297         return 0;
 298 }
 299
 300 static int interface_release(struct net_device *dev)
 301 {
 302         netif_stop_queue(dev);
 303         return 0;
 304 }
 305
 306 static struct net_device_stats *interface_stats(struct net_device *dev)
 307 {
 308         struct bat_priv *bat_priv = netdev_priv(dev);
 309         return &bat_priv->stats;
 310 }
 311
 312 static int interface_set_mac_addr(struct net_device *dev, void *p)
 313 {
 314         struct bat_priv *bat_priv = netdev_priv(dev);
 315         struct sockaddr *addr = p;
 316
 317         if (!is_valid_ether_addr(addr->sa_data))
 318                 return -EADDRNOTAVAIL;
 319
 320         /* only modify hna-table if it has been initialised before */
 321         if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) {
 322                 hna_local_remove(bat_priv, dev->dev_addr,
 323                                  "mac address changed");
 324                 hna_local_add(dev, addr->sa_data);
 325         }
 326
 327         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
 328         return 0;
 329 }
 330
 331 static int interface_change_mtu(struct net_device *dev, int new_mtu)
 332 {
 333         /* check ranges */
 334         if ((new_mtu < 68) || (new_mtu > hardif_min_mtu(dev)))
 335                 return -EINVAL;
 336
 337         dev->mtu = new_mtu;
 338
 339         return 0;
 340 }
 341
 342 int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
 343 {
 344         struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
 345         struct bat_priv *bat_priv = netdev_priv(soft_iface);
 346         struct bcast_packet *bcast_packet;
 347         struct vlan_ethhdr *vhdr;
 348         int data_len = skb->len, ret;
 349         short vid = -1;
 350         bool do_bcast = false;
 351
 352         if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
 353                 goto dropped;
 354
 355         soft_iface->trans_start = jiffies;
 356
 357         switch (ntohs(ethhdr->h_proto)) {
 358         case ETH_P_8021Q:
 359                 vhdr = (struct vlan_ethhdr *)skb->data;
 360                 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
 361
 362                 if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
 363                         break;
 364
 365                 /* fall through */
 366         case ETH_P_BATMAN:
 367                 softif_batman_recv(skb, soft_iface, vid);
 368                 goto end;
 369         }
 370
 371         /**
 372          * if we have a another chosen mesh exit node in range
 373          * it will transport the packets to the mesh
 374          */
 375         if ((bat_priv->softif_neigh) && (bat_priv->softif_neigh->vid == vid))
 376                 goto dropped;
 377
 378         /* TODO: check this for locks */
 379         hna_local_add(soft_iface, ethhdr->h_source);
 380
 381         if (is_multicast_ether_addr(ethhdr->h_dest)) {
 382                 ret = gw_is_target(bat_priv, skb);
 383
 384                 if (ret < 0)
 385                         goto dropped;
 386
 387                 if (ret == 0)
 388                         do_bcast = true;
 389         }
 390
 391         /* ethernet packet should be broadcasted */
 392         if (do_bcast) {
 393                 if (!bat_priv->primary_if)
 394                         goto dropped;
 395
 396                 if (my_skb_head_push(skb, sizeof(struct bcast_packet)) < 0)
 397                         goto dropped;
 398
 399                 bcast_packet = (struct bcast_packet *)skb->data;
 400                 bcast_packet->version = COMPAT_VERSION;
 401                 bcast_packet->ttl = TTL;
 402
 403                 /* batman packet type: broadcast */
 404                 bcast_packet->packet_type = BAT_BCAST;
 405
 406                 /* hw address of first interface is the orig mac because only
 407                  * this mac is known throughout the mesh */
 408                 memcpy(bcast_packet->orig,
 409                        bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
 410
 411                 /* set broadcast sequence number */
 412                 bcast_packet->seqno =
 413                         htonl(atomic_inc_return(&bat_priv->bcast_seqno));
 414
 415                 add_bcast_packet_to_list(bat_priv, skb);
 416
 417                 /* a copy is stored in the bcast list, therefore removing
 418                  * the original skb. */
 419                 kfree_skb(skb);
 420
 421         /* unicast packet */
 422         } else {
 423                 ret = unicast_send_skb(skb, bat_priv);
 424                 if (ret != 0)
 425                         goto dropped_freed;
 426         }
 427
 428         bat_priv->stats.tx_packets++;
 429         bat_priv->stats.tx_bytes += data_len;
 430         goto end;
 431
 432 dropped:
 433         kfree_skb(skb);
 434 dropped_freed:
 435         bat_priv->stats.tx_dropped++;
 436 end:
 437         return NETDEV_TX_OK;
 438 }
 439
 440 void interface_rx(struct net_device *soft_iface,
 441                   struct sk_buff *skb, struct batman_if *recv_if,
 442                   int hdr_size)
 443 {
 444         struct bat_priv *bat_priv = netdev_priv(soft_iface);
 445         struct unicast_packet *unicast_packet;
 446         struct ethhdr *ethhdr;
 447         struct vlan_ethhdr *vhdr;
 448         short vid = -1;
 449         int ret;
 450
 451         /* check if enough space is available for pulling, and pull */
 452         if (!pskb_may_pull(skb, hdr_size))
 453                 goto dropped;
 454
 455         skb_pull_rcsum(skb, hdr_size);
 456         skb_reset_mac_header(skb);
 457
 458         ethhdr = (struct ethhdr *)skb_mac_header(skb);
 459
 460         switch (ntohs(ethhdr->h_proto)) {
 461         case ETH_P_8021Q:
 462                 vhdr = (struct vlan_ethhdr *)skb->data;
 463                 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
 464
 465                 if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
 466                         break;
 467
 468                 /* fall through */
 469         case ETH_P_BATMAN:
 470                 goto dropped;
 471         }
 472
 473         /**
 474          * if we have a another chosen mesh exit node in range
 475          * it will transport the packets to the non-mesh network
 476          */
 477         if ((bat_priv->softif_neigh) && (bat_priv->softif_neigh->vid == vid)) {
 478                 skb_push(skb, hdr_size);
 479                 unicast_packet = (struct unicast_packet *)skb->data;
 480
 481                 if ((unicast_packet->packet_type != BAT_UNICAST) &&
 482                     (unicast_packet->packet_type != BAT_UNICAST_FRAG))
 483                         goto dropped;
 484
 485                 skb_reset_mac_header(skb);
 486
 487                 memcpy(unicast_packet->dest,
 488                        bat_priv->softif_neigh->addr, ETH_ALEN);
 489                 ret = route_unicast_packet(skb, recv_if, hdr_size);
 490                 if (ret == NET_RX_DROP)
 491                         goto dropped;
 492
 493                 goto out;
 494         }
 495
 496         /* skb->dev & skb->pkt_type are set here */
 497         if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
 498                 goto dropped;
 499         skb->protocol = eth_type_trans(skb, soft_iface);
 500
 501         /* should not be neccesary anymore as we use skb_pull_rcsum()
 502          * TODO: please verify this and remove this TODO
 503          * -- Dec 21st 2009, Simon Wunderlich */
 504
 505 /*      skb->ip_summed = CHECKSUM_UNNECESSARY;*/
 506
 507         bat_priv->stats.rx_packets++;
 508         bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
 509
 510         soft_iface->last_rx = jiffies;
 511
 512         netif_rx(skb);
 513         return;
 514
 515 dropped:
 516         kfree_skb(skb);
 517 out:
 518         return;
 519 }
 520
 521 #ifdef HAVE_NET_DEVICE_OPS
 522 static const struct net_device_ops bat_netdev_ops = {
 523         .ndo_open = interface_open,
 524         .ndo_stop = interface_release,
 525         .ndo_get_stats = interface_stats,
 526         .ndo_set_mac_address = interface_set_mac_addr,
 527         .ndo_change_mtu = interface_change_mtu,
 528         .ndo_start_xmit = interface_tx,
 529         .ndo_validate_addr = eth_validate_addr
 530 };
 531 #endif
 532
 533 static void interface_setup(struct net_device *dev)
 534 {
 535         struct bat_priv *priv = netdev_priv(dev);
 536         char dev_addr[ETH_ALEN];
 537
 538         ether_setup(dev);
 539
 540 #ifdef HAVE_NET_DEVICE_OPS
 541         dev->netdev_ops = &bat_netdev_ops;
 542 #else
 543         dev->open = interface_open;
 544         dev->stop = interface_release;
 545         dev->get_stats = interface_stats;
 546         dev->set_mac_address = interface_set_mac_addr;
 547         dev->change_mtu = interface_change_mtu;
 548         dev->hard_start_xmit = interface_tx;
 549 #endif
 550         dev->destructor = free_netdev;
 551
 552         /**
 553          * can't call min_mtu, because the needed variables
 554          * have not been initialized yet
 555          */
 556         dev->mtu = ETH_DATA_LEN;
 557         dev->hard_header_len = BAT_HEADER_LEN; /* reserve more space in the
 558                                                 * skbuff for our header */
 559
 560         /* generate random address */
 561         random_ether_addr(dev_addr);
 562         memcpy(dev->dev_addr, dev_addr, ETH_ALEN);
 563
 564         SET_ETHTOOL_OPS(dev, &bat_ethtool_ops);
 565
 566         memset(priv, 0, sizeof(struct bat_priv));
 567 }
 568
 569 struct net_device *softif_create(char *name)
 570 {
 571         struct net_device *soft_iface;
 572         struct bat_priv *bat_priv;
 573         int ret;
 574
 575         soft_iface = alloc_netdev(sizeof(struct bat_priv) , name,
 576                                    interface_setup);
 577
 578         if (!soft_iface) {
 579                 pr_err("Unable to allocate the batman interface: %s\n", name);
 580                 goto out;
 581         }
 582
 583         ret = register_netdev(soft_iface);
 584         if (ret < 0) {
 585                 pr_err("Unable to register the batman interface '%s': %i\n",
 586                        name, ret);
 587                 goto free_soft_iface;
 588         }
 589
 590         bat_priv = netdev_priv(soft_iface);
 591
 592         atomic_set(&bat_priv->aggregated_ogms, 1);
 593         atomic_set(&bat_priv->bonding, 0);
 594         atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE);
 595         atomic_set(&bat_priv->gw_mode, GW_MODE_OFF);
 596         atomic_set(&bat_priv->gw_sel_class, 20);
 597         atomic_set(&bat_priv->gw_bandwidth, 41);
 598         atomic_set(&bat_priv->orig_interval, 1000);
 599         atomic_set(&bat_priv->hop_penalty, 10);
 600         atomic_set(&bat_priv->log_level, 0);
 601         atomic_set(&bat_priv->fragmentation, 1);
 602         atomic_set(&bat_priv->bcast_queue_left, BCAST_QUEUE_LEN);
 603         atomic_set(&bat_priv->batman_queue_left, BATMAN_QUEUE_LEN);
 604
 605         atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
 606         atomic_set(&bat_priv->bcast_seqno, 1);
 607         atomic_set(&bat_priv->hna_local_changed, 0);
 608
 609         bat_priv->primary_if = NULL;
 610         bat_priv->num_ifaces = 0;
 611         bat_priv->softif_neigh = NULL;
 612
 613         ret = sysfs_add_meshif(soft_iface);
 614         if (ret < 0)
 615                 goto unreg_soft_iface;
 616
 617         ret = debugfs_add_meshif(soft_iface);
 618         if (ret < 0)
 619                 goto unreg_sysfs;
 620
 621         ret = mesh_init(soft_iface);
 622         if (ret < 0)
 623                 goto unreg_debugfs;
 624
 625         return soft_iface;
 626
 627 unreg_debugfs:
 628         debugfs_del_meshif(soft_iface);
 629 unreg_sysfs:
 630         sysfs_del_meshif(soft_iface);
 631 unreg_soft_iface:
 632         unregister_netdev(soft_iface);
 633         return NULL;
 634
 635 free_soft_iface:
 636         free_netdev(soft_iface);
 637 out:
 638         return NULL;
 639 }
 640
 641 void softif_destroy(struct net_device *soft_iface)
 642 {
 643         debugfs_del_meshif(soft_iface);
 644         sysfs_del_meshif(soft_iface);
 645         mesh_free(soft_iface);
 646         unregister_netdevice(soft_iface);
 647 }
 648
 649 /* ethtool */
 650 static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 651 {
 652         cmd->supported = 0;
 653         cmd->advertising = 0;
 654         cmd->speed = SPEED_10;
 655         cmd->duplex = DUPLEX_FULL;
 656         cmd->port = PORT_TP;
 657         cmd->phy_address = 0;
 658         cmd->transceiver = XCVR_INTERNAL;
 659         cmd->autoneg = AUTONEG_DISABLE;
 660         cmd->maxtxpkt = 0;
 661         cmd->maxrxpkt = 0;
 662
 663         return 0;
 664 }
 665
 666 static void bat_get_drvinfo(struct net_device *dev,
 667                             struct ethtool_drvinfo *info)
 668 {
 669         strcpy(info->driver, "B.A.T.M.A.N. advanced");
 670         strcpy(info->version, SOURCE_VERSION);
 671         strcpy(info->fw_version, "N/A");
 672         strcpy(info->bus_info, "batman");
 673 }
 674
 675 static u32 bat_get_msglevel(struct net_device *dev)
 676 {
 677         return -EOPNOTSUPP;
 678 }
 679
 680 static void bat_set_msglevel(struct net_device *dev, u32 value)
 681 {
 682 }
 683
 684 static u32 bat_get_link(struct net_device *dev)
 685 {
 686         return 1;
 687 }
 688
 689 static u32 bat_get_rx_csum(struct net_device *dev)
 690 {
 691         return 0;
 692 }
 693
 694 static int bat_set_rx_csum(struct net_device *dev, u32 data)
 695 {
 696         return -EOPNOTSUPP;
 697 }