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