net/mac802154/iface.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2007-2012 Siemens AG
   4  *
   5  * Written by:
   6  * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
   7  * Sergey Lapin <slapin@ossfans.org>
   8  * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
   9  * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
  10  */
  11
  12 #include <linux/netdevice.h>
  13 #include <linux/module.h>
  14 #include <linux/if_arp.h>
  15 #include <linux/ieee802154.h>
  16
  17 #include <net/nl802154.h>
  18 #include <net/mac802154.h>
  19 #include <net/ieee802154_netdev.h>
  20 #include <net/cfg802154.h>
  21
  22 #include "ieee802154_i.h"
  23 #include "driver-ops.h"
  24
  25 int mac802154_wpan_update_llsec(struct net_device *dev)
  26 {
  27         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
  28         struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
  29         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
  30         int rc = 0;
  31
  32         if (ops->llsec) {
  33                 struct ieee802154_llsec_params params;
  34                 int changed = 0;
  35
  36                 params.pan_id = wpan_dev->pan_id;
  37                 changed |= IEEE802154_LLSEC_PARAM_PAN_ID;
  38
  39                 params.hwaddr = wpan_dev->extended_addr;
  40                 changed |= IEEE802154_LLSEC_PARAM_HWADDR;
  41
  42                 rc = ops->llsec->set_params(dev, &params, changed);
  43         }
  44
  45         return rc;
  46 }
  47
  48 static int
  49 mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
  50 {
  51         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
  52         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
  53         struct sockaddr_ieee802154 *sa =
  54                 (struct sockaddr_ieee802154 *)&ifr->ifr_addr;
  55         int err = -ENOIOCTLCMD;
  56
  57         if (cmd != SIOCGIFADDR && cmd != SIOCSIFADDR)
  58                 return err;
  59
  60         rtnl_lock();
  61
  62         switch (cmd) {
  63         case SIOCGIFADDR:
  64         {
  65                 u16 pan_id, short_addr;
  66
  67                 pan_id = le16_to_cpu(wpan_dev->pan_id);
  68                 short_addr = le16_to_cpu(wpan_dev->short_addr);
  69                 if (pan_id == IEEE802154_PANID_BROADCAST ||
  70                     short_addr == IEEE802154_ADDR_BROADCAST) {
  71                         err = -EADDRNOTAVAIL;
  72                         break;
  73                 }
  74
  75                 sa->family = AF_IEEE802154;
  76                 sa->addr.addr_type = IEEE802154_ADDR_SHORT;
  77                 sa->addr.pan_id = pan_id;
  78                 sa->addr.short_addr = short_addr;
  79
  80                 err = 0;
  81                 break;
  82         }
  83         case SIOCSIFADDR:
  84                 if (netif_running(dev)) {
  85                         rtnl_unlock();
  86                         return -EBUSY;
  87                 }
  88
  89                 dev_warn(&dev->dev,
  90                          "Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
  91                 if (sa->family != AF_IEEE802154 ||
  92                     sa->addr.addr_type != IEEE802154_ADDR_SHORT ||
  93                     sa->addr.pan_id == IEEE802154_PANID_BROADCAST ||
  94                     sa->addr.short_addr == IEEE802154_ADDR_BROADCAST ||
  95                     sa->addr.short_addr == IEEE802154_ADDR_UNDEF) {
  96                         err = -EINVAL;
  97                         break;
  98                 }
  99
 100                 wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id);
 101                 wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr);
 102
 103                 err = mac802154_wpan_update_llsec(dev);
 104                 break;
 105         }
 106
 107         rtnl_unlock();
 108         return err;
 109 }
 110
 111 static int mac802154_wpan_mac_addr(struct net_device *dev, void *p)
 112 {
 113         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 114         struct sockaddr *addr = p;
 115         __le64 extended_addr;
 116
 117         if (netif_running(dev))
 118                 return -EBUSY;
 119
 120         /* lowpan need to be down for update
 121          * SLAAC address after ifup
 122          */
 123         if (sdata->wpan_dev.lowpan_dev) {
 124                 if (netif_running(sdata->wpan_dev.lowpan_dev))
 125                         return -EBUSY;
 126         }
 127
 128         ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
 129         if (!ieee802154_is_valid_extended_unicast_addr(extended_addr))
 130                 return -EINVAL;
 131
 132         dev_addr_set(dev, addr->sa_data);
 133         sdata->wpan_dev.extended_addr = extended_addr;
 134
 135         /* update lowpan interface mac address when
 136          * wpan mac has been changed
 137          */
 138         if (sdata->wpan_dev.lowpan_dev)
 139                 dev_addr_set(sdata->wpan_dev.lowpan_dev, dev->dev_addr);
 140
 141         return mac802154_wpan_update_llsec(dev);
 142 }
 143
 144 static int ieee802154_setup_hw(struct ieee802154_sub_if_data *sdata)
 145 {
 146         struct ieee802154_local *local = sdata->local;
 147         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 148         int ret;
 149
 150         if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
 151                 ret = drv_set_promiscuous_mode(local,
 152                                                wpan_dev->promiscuous_mode);
 153                 if (ret < 0)
 154                         return ret;
 155         }
 156
 157         if (local->hw.flags & IEEE802154_HW_AFILT) {
 158                 ret = drv_set_pan_id(local, wpan_dev->pan_id);
 159                 if (ret < 0)
 160                         return ret;
 161
 162                 ret = drv_set_extended_addr(local, wpan_dev->extended_addr);
 163                 if (ret < 0)
 164                         return ret;
 165
 166                 ret = drv_set_short_addr(local, wpan_dev->short_addr);
 167                 if (ret < 0)
 168                         return ret;
 169         }
 170
 171         if (local->hw.flags & IEEE802154_HW_LBT) {
 172                 ret = drv_set_lbt_mode(local, wpan_dev->lbt);
 173                 if (ret < 0)
 174                         return ret;
 175         }
 176
 177         if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
 178                 ret = drv_set_csma_params(local, wpan_dev->min_be,
 179                                           wpan_dev->max_be,
 180                                           wpan_dev->csma_retries);
 181                 if (ret < 0)
 182                         return ret;
 183         }
 184
 185         if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
 186                 ret = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
 187                 if (ret < 0)
 188                         return ret;
 189         }
 190
 191         return 0;
 192 }
 193
 194 static int mac802154_slave_open(struct net_device *dev)
 195 {
 196         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 197         struct ieee802154_local *local = sdata->local;
 198         int res;
 199
 200         ASSERT_RTNL();
 201
 202         set_bit(SDATA_STATE_RUNNING, &sdata->state);
 203
 204         if (!local->open_count) {
 205                 res = ieee802154_setup_hw(sdata);
 206                 if (res)
 207                         goto err;
 208
 209                 res = drv_start(local);
 210                 if (res)
 211                         goto err;
 212         }
 213
 214         local->open_count++;
 215         netif_start_queue(dev);
 216         return 0;
 217 err:
 218         /* might already be clear but that doesn't matter */
 219         clear_bit(SDATA_STATE_RUNNING, &sdata->state);
 220
 221         return res;
 222 }
 223
 224 static int
 225 ieee802154_check_mac_settings(struct ieee802154_local *local,
 226                               struct wpan_dev *wpan_dev,
 227                               struct wpan_dev *nwpan_dev)
 228 {
 229         ASSERT_RTNL();
 230
 231         if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
 232                 if (wpan_dev->promiscuous_mode != nwpan_dev->promiscuous_mode)
 233                         return -EBUSY;
 234         }
 235
 236         if (local->hw.flags & IEEE802154_HW_AFILT) {
 237                 if (wpan_dev->pan_id != nwpan_dev->pan_id ||
 238                     wpan_dev->short_addr != nwpan_dev->short_addr ||
 239                     wpan_dev->extended_addr != nwpan_dev->extended_addr)
 240                         return -EBUSY;
 241         }
 242
 243         if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
 244                 if (wpan_dev->min_be != nwpan_dev->min_be ||
 245                     wpan_dev->max_be != nwpan_dev->max_be ||
 246                     wpan_dev->csma_retries != nwpan_dev->csma_retries)
 247                         return -EBUSY;
 248         }
 249
 250         if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
 251                 if (wpan_dev->frame_retries != nwpan_dev->frame_retries)
 252                         return -EBUSY;
 253         }
 254
 255         if (local->hw.flags & IEEE802154_HW_LBT) {
 256                 if (wpan_dev->lbt != nwpan_dev->lbt)
 257                         return -EBUSY;
 258         }
 259
 260         return 0;
 261 }
 262
 263 static int
 264 ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata,
 265                                   enum nl802154_iftype iftype)
 266 {
 267         struct ieee802154_local *local = sdata->local;
 268         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 269         struct ieee802154_sub_if_data *nsdata;
 270
 271         /* we hold the RTNL here so can safely walk the list */
 272         list_for_each_entry(nsdata, &local->interfaces, list) {
 273                 if (nsdata != sdata && ieee802154_sdata_running(nsdata)) {
 274                         int ret;
 275
 276                         /* TODO currently we don't support multiple node types
 277                          * we need to run skb_clone at rx path. Check if there
 278                          * exist really an use case if we need to support
 279                          * multiple node types at the same time.
 280                          */
 281                         if (wpan_dev->iftype == NL802154_IFTYPE_NODE &&
 282                             nsdata->wpan_dev.iftype == NL802154_IFTYPE_NODE)
 283                                 return -EBUSY;
 284
 285                         /* check all phy mac sublayer settings are the same.
 286                          * We have only one phy, different values makes trouble.
 287                          */
 288                         ret = ieee802154_check_mac_settings(local, wpan_dev,
 289                                                             &nsdata->wpan_dev);
 290                         if (ret < 0)
 291                                 return ret;
 292                 }
 293         }
 294
 295         return 0;
 296 }
 297
 298 static int mac802154_wpan_open(struct net_device *dev)
 299 {
 300         int rc;
 301         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 302         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 303
 304         rc = ieee802154_check_concurrent_iface(sdata, wpan_dev->iftype);
 305         if (rc < 0)
 306                 return rc;
 307
 308         return mac802154_slave_open(dev);
 309 }
 310
 311 static int mac802154_slave_close(struct net_device *dev)
 312 {
 313         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 314         struct ieee802154_local *local = sdata->local;
 315
 316         ASSERT_RTNL();
 317
 318         netif_stop_queue(dev);
 319         local->open_count--;
 320
 321         clear_bit(SDATA_STATE_RUNNING, &sdata->state);
 322
 323         if (!local->open_count)
 324                 ieee802154_stop_device(local);
 325
 326         return 0;
 327 }
 328
 329 static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
 330                                          struct ieee802154_hdr *hdr,
 331                                          const struct ieee802154_mac_cb *cb)
 332 {
 333         struct ieee802154_llsec_params params;
 334         u8 level;
 335
 336         mac802154_llsec_get_params(&sdata->sec, &params);
 337
 338         if (!params.enabled && cb->secen_override && cb->secen)
 339                 return -EINVAL;
 340         if (!params.enabled ||
 341             (cb->secen_override && !cb->secen) ||
 342             !params.out_level)
 343                 return 0;
 344         if (cb->seclevel_override && !cb->seclevel)
 345                 return -EINVAL;
 346
 347         level = cb->seclevel_override ? cb->seclevel : params.out_level;
 348
 349         hdr->fc.security_enabled = 1;
 350         hdr->sec.level = level;
 351         hdr->sec.key_id_mode = params.out_key.mode;
 352         if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
 353                 hdr->sec.short_src = params.out_key.short_source;
 354         else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
 355                 hdr->sec.extended_src = params.out_key.extended_source;
 356         hdr->sec.key_id = params.out_key.id;
 357
 358         return 0;
 359 }
 360
 361 static int ieee802154_header_create(struct sk_buff *skb,
 362                                     struct net_device *dev,
 363                                     const struct ieee802154_addr *daddr,
 364                                     const struct ieee802154_addr *saddr,
 365                                     unsigned len)
 366 {
 367         struct ieee802154_hdr hdr;
 368         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 369         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 370         struct ieee802154_mac_cb *cb = mac_cb(skb);
 371         int hlen;
 372
 373         if (!daddr)
 374                 return -EINVAL;
 375
 376         memset(&hdr.fc, 0, sizeof(hdr.fc));
 377         hdr.fc.type = cb->type;
 378         hdr.fc.security_enabled = cb->secen;
 379         hdr.fc.ack_request = cb->ackreq;
 380         hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF;
 381
 382         if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
 383                 return -EINVAL;
 384
 385         if (!saddr) {
 386                 if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) ||
 387                     wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) ||
 388                     wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
 389                         hdr.source.mode = IEEE802154_ADDR_LONG;
 390                         hdr.source.extended_addr = wpan_dev->extended_addr;
 391                 } else {
 392                         hdr.source.mode = IEEE802154_ADDR_SHORT;
 393                         hdr.source.short_addr = wpan_dev->short_addr;
 394                 }
 395
 396                 hdr.source.pan_id = wpan_dev->pan_id;
 397         } else {
 398                 hdr.source = *(const struct ieee802154_addr *)saddr;
 399         }
 400
 401         hdr.dest = *(const struct ieee802154_addr *)daddr;
 402
 403         hlen = ieee802154_hdr_push(skb, &hdr);
 404         if (hlen < 0)
 405                 return -EINVAL;
 406
 407         skb_reset_mac_header(skb);
 408         skb->mac_len = hlen;
 409
 410         if (len > ieee802154_max_payload(&hdr))
 411                 return -EMSGSIZE;
 412
 413         return hlen;
 414 }
 415
 416 static const struct wpan_dev_header_ops ieee802154_header_ops = {
 417         .create         = ieee802154_header_create,
 418 };
 419
 420 /* This header create functionality assumes a 8 byte array for
 421  * source and destination pointer at maximum. To adapt this for
 422  * the 802.15.4 dataframe header we use extended address handling
 423  * here only and intra pan connection. fc fields are mostly fallback
 424  * handling. For provide dev_hard_header for dgram sockets.
 425  */
 426 static int mac802154_header_create(struct sk_buff *skb,
 427                                    struct net_device *dev,
 428                                    unsigned short type,
 429                                    const void *daddr,
 430                                    const void *saddr,
 431                                    unsigned len)
 432 {
 433         struct ieee802154_hdr hdr;
 434         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 435         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 436         struct ieee802154_mac_cb cb = { };
 437         int hlen;
 438
 439         if (!daddr)
 440                 return -EINVAL;
 441
 442         memset(&hdr.fc, 0, sizeof(hdr.fc));
 443         hdr.fc.type = IEEE802154_FC_TYPE_DATA;
 444         hdr.fc.ack_request = wpan_dev->ackreq;
 445         hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF;
 446
 447         /* TODO currently a workaround to give zero cb block to set
 448          * security parameters defaults according MIB.
 449          */
 450         if (mac802154_set_header_security(sdata, &hdr, &cb) < 0)
 451                 return -EINVAL;
 452
 453         hdr.dest.pan_id = wpan_dev->pan_id;
 454         hdr.dest.mode = IEEE802154_ADDR_LONG;
 455         ieee802154_be64_to_le64(&hdr.dest.extended_addr, daddr);
 456
 457         hdr.source.pan_id = hdr.dest.pan_id;
 458         hdr.source.mode = IEEE802154_ADDR_LONG;
 459
 460         if (!saddr)
 461                 hdr.source.extended_addr = wpan_dev->extended_addr;
 462         else
 463                 ieee802154_be64_to_le64(&hdr.source.extended_addr, saddr);
 464
 465         hlen = ieee802154_hdr_push(skb, &hdr);
 466         if (hlen < 0)
 467                 return -EINVAL;
 468
 469         skb_reset_mac_header(skb);
 470         skb->mac_len = hlen;
 471
 472         if (len > ieee802154_max_payload(&hdr))
 473                 return -EMSGSIZE;
 474
 475         return hlen;
 476 }
 477
 478 static int
 479 mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr)
 480 {
 481         struct ieee802154_hdr hdr;
 482
 483         if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
 484                 pr_debug("malformed packet\n");
 485                 return 0;
 486         }
 487
 488         if (hdr.source.mode == IEEE802154_ADDR_LONG) {
 489                 ieee802154_le64_to_be64(haddr, &hdr.source.extended_addr);
 490                 return IEEE802154_EXTENDED_ADDR_LEN;
 491         }
 492
 493         return 0;
 494 }
 495
 496 static const struct header_ops mac802154_header_ops = {
 497         .create         = mac802154_header_create,
 498         .parse          = mac802154_header_parse,
 499 };
 500
 501 static const struct net_device_ops mac802154_wpan_ops = {
 502         .ndo_open               = mac802154_wpan_open,
 503         .ndo_stop               = mac802154_slave_close,
 504         .ndo_start_xmit         = ieee802154_subif_start_xmit,
 505         .ndo_do_ioctl           = mac802154_wpan_ioctl,
 506         .ndo_set_mac_address    = mac802154_wpan_mac_addr,
 507 };
 508
 509 static const struct net_device_ops mac802154_monitor_ops = {
 510         .ndo_open               = mac802154_wpan_open,
 511         .ndo_stop               = mac802154_slave_close,
 512         .ndo_start_xmit         = ieee802154_monitor_start_xmit,
 513 };
 514
 515 static void mac802154_wpan_free(struct net_device *dev)
 516 {
 517         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 518
 519         mac802154_llsec_destroy(&sdata->sec);
 520 }
 521
 522 static void ieee802154_if_setup(struct net_device *dev)
 523 {
 524         dev->addr_len           = IEEE802154_EXTENDED_ADDR_LEN;
 525         memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);
 526
 527         /* Let hard_header_len set to IEEE802154_MIN_HEADER_LEN. AF_PACKET
 528          * will not send frames without any payload, but ack frames
 529          * has no payload, so substract one that we can send a 3 bytes
 530          * frame. The xmit callback assumes at least a hard header where two
 531          * bytes fc and sequence field are set.
 532          */
 533         dev->hard_header_len    = IEEE802154_MIN_HEADER_LEN - 1;
 534         /* The auth_tag header is for security and places in private payload
 535          * room of mac frame which stucks between payload and FCS field.
 536          */
 537         dev->needed_tailroom    = IEEE802154_MAX_AUTH_TAG_LEN +
 538                                   IEEE802154_FCS_LEN;
 539         /* The mtu size is the payload without mac header in this case.
 540          * We have a dynamic length header with a minimum header length
 541          * which is hard_header_len. In this case we let mtu to the size
 542          * of maximum payload which is IEEE802154_MTU - IEEE802154_FCS_LEN -
 543          * hard_header_len. The FCS which is set by hardware or ndo_start_xmit
 544          * and the minimum mac header which can be evaluated inside driver
 545          * layer. The rest of mac header will be part of payload if greater
 546          * than hard_header_len.
 547          */
 548         dev->mtu                = IEEE802154_MTU - IEEE802154_FCS_LEN -
 549                                   dev->hard_header_len;
 550         dev->tx_queue_len       = 300;
 551         dev->flags              = IFF_NOARP | IFF_BROADCAST;
 552 }
 553
 554 static int
 555 ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata,
 556                        enum nl802154_iftype type)
 557 {
 558         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 559         int ret;
 560         u8 tmp;
 561
 562         /* set some type-dependent values */
 563         sdata->wpan_dev.iftype = type;
 564
 565         get_random_bytes(&tmp, sizeof(tmp));
 566         atomic_set(&wpan_dev->bsn, tmp);
 567         get_random_bytes(&tmp, sizeof(tmp));
 568         atomic_set(&wpan_dev->dsn, tmp);
 569
 570         /* defaults per 802.15.4-2011 */
 571         wpan_dev->min_be = 3;
 572         wpan_dev->max_be = 5;
 573         wpan_dev->csma_retries = 4;
 574         wpan_dev->frame_retries = 3;
 575
 576         wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
 577         wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
 578
 579         switch (type) {
 580         case NL802154_IFTYPE_NODE:
 581                 ieee802154_be64_to_le64(&wpan_dev->extended_addr,
 582                                         sdata->dev->dev_addr);
 583
 584                 sdata->dev->header_ops = &mac802154_header_ops;
 585                 sdata->dev->needs_free_netdev = true;
 586                 sdata->dev->priv_destructor = mac802154_wpan_free;
 587                 sdata->dev->netdev_ops = &mac802154_wpan_ops;
 588                 sdata->dev->ml_priv = &mac802154_mlme_wpan;
 589                 wpan_dev->promiscuous_mode = false;
 590                 wpan_dev->header_ops = &ieee802154_header_ops;
 591
 592                 mutex_init(&sdata->sec_mtx);
 593
 594                 mac802154_llsec_init(&sdata->sec);
 595                 ret = mac802154_wpan_update_llsec(sdata->dev);
 596                 if (ret < 0)
 597                         return ret;
 598
 599                 break;
 600         case NL802154_IFTYPE_MONITOR:
 601                 sdata->dev->needs_free_netdev = true;
 602                 sdata->dev->netdev_ops = &mac802154_monitor_ops;
 603                 wpan_dev->promiscuous_mode = true;
 604                 break;
 605         default:
 606                 BUG();
 607         }
 608
 609         return 0;
 610 }
 611
 612 struct net_device *
 613 ieee802154_if_add(struct ieee802154_local *local, const char *name,
 614                   unsigned char name_assign_type, enum nl802154_iftype type,
 615                   __le64 extended_addr)
 616 {
 617         u8 addr[IEEE802154_EXTENDED_ADDR_LEN];
 618         struct net_device *ndev = NULL;
 619         struct ieee802154_sub_if_data *sdata = NULL;
 620         int ret;
 621
 622         ASSERT_RTNL();
 623
 624         ndev = alloc_netdev(sizeof(*sdata), name,
 625                             name_assign_type, ieee802154_if_setup);
 626         if (!ndev)
 627                 return ERR_PTR(-ENOMEM);
 628
 629         ndev->needed_headroom = local->hw.extra_tx_headroom +
 630                                 IEEE802154_MAX_HEADER_LEN;
 631
 632         ret = dev_alloc_name(ndev, ndev->name);
 633         if (ret < 0)
 634                 goto err;
 635
 636         ieee802154_le64_to_be64(ndev->perm_addr,
 637                                 &local->hw.phy->perm_extended_addr);
 638         switch (type) {
 639         case NL802154_IFTYPE_NODE:
 640                 ndev->type = ARPHRD_IEEE802154;
 641                 if (ieee802154_is_valid_extended_unicast_addr(extended_addr)) {
 642                         ieee802154_le64_to_be64(addr, &extended_addr);
 643                         dev_addr_set(ndev, addr);
 644                 } else {
 645                         dev_addr_set(ndev, ndev->perm_addr);
 646                 }
 647                 break;
 648         case NL802154_IFTYPE_MONITOR:
 649                 ndev->type = ARPHRD_IEEE802154_MONITOR;
 650                 break;
 651         default:
 652                 ret = -EINVAL;
 653                 goto err;
 654         }
 655
 656         /* TODO check this */
 657         SET_NETDEV_DEV(ndev, &local->phy->dev);
 658         dev_net_set(ndev, wpan_phy_net(local->hw.phy));
 659         sdata = netdev_priv(ndev);
 660         ndev->ieee802154_ptr = &sdata->wpan_dev;
 661         memcpy(sdata->name, ndev->name, IFNAMSIZ);
 662         sdata->dev = ndev;
 663         sdata->wpan_dev.wpan_phy = local->hw.phy;
 664         sdata->local = local;
 665
 666         /* setup type-dependent data */
 667         ret = ieee802154_setup_sdata(sdata, type);
 668         if (ret)
 669                 goto err;
 670
 671         ret = register_netdevice(ndev);
 672         if (ret < 0)
 673                 goto err;
 674
 675         mutex_lock(&local->iflist_mtx);
 676         list_add_tail_rcu(&sdata->list, &local->interfaces);
 677         mutex_unlock(&local->iflist_mtx);
 678
 679         return ndev;
 680
 681 err:
 682         free_netdev(ndev);
 683         return ERR_PTR(ret);
 684 }
 685
 686 void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
 687 {
 688         ASSERT_RTNL();
 689
 690         mutex_lock(&sdata->local->iflist_mtx);
 691         list_del_rcu(&sdata->list);
 692         mutex_unlock(&sdata->local->iflist_mtx);
 693
 694         synchronize_rcu();
 695         unregister_netdevice(sdata->dev);
 696 }
 697
 698 void ieee802154_remove_interfaces(struct ieee802154_local *local)
 699 {
 700         struct ieee802154_sub_if_data *sdata, *tmp;
 701
 702         mutex_lock(&local->iflist_mtx);
 703         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
 704                 list_del(&sdata->list);
 705
 706                 unregister_netdevice(sdata->dev);
 707         }
 708         mutex_unlock(&local->iflist_mtx);
 709 }
 710
 711 static int netdev_notify(struct notifier_block *nb,
 712                          unsigned long state, void *ptr)
 713 {
 714         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
 715         struct ieee802154_sub_if_data *sdata;
 716
 717         if (state != NETDEV_CHANGENAME)
 718                 return NOTIFY_DONE;
 719
 720         if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy)
 721                 return NOTIFY_DONE;
 722
 723         if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid)
 724                 return NOTIFY_DONE;
 725
 726         sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 727         memcpy(sdata->name, dev->name, IFNAMSIZ);
 728
 729         return NOTIFY_OK;
 730 }
 731
 732 static struct notifier_block mac802154_netdev_notifier = {
 733         .notifier_call = netdev_notify,
 734 };
 735
 736 int ieee802154_iface_init(void)
 737 {
 738         return register_netdevice_notifier(&mac802154_netdev_notifier);
 739 }
 740
 741 void ieee802154_iface_exit(void)
 742 {
 743         unregister_netdevice_notifier(&mac802154_netdev_notifier);
 744 }