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         sdata->required_filtering = sdata->iface_default_filtering;
 151
 152         if (local->hw.flags & IEEE802154_HW_AFILT) {
 153                 local->addr_filt.pan_id = wpan_dev->pan_id;
 154                 local->addr_filt.ieee_addr = wpan_dev->extended_addr;
 155                 local->addr_filt.short_addr = wpan_dev->short_addr;
 156         }
 157
 158         if (local->hw.flags & IEEE802154_HW_LBT) {
 159                 ret = drv_set_lbt_mode(local, wpan_dev->lbt);
 160                 if (ret < 0)
 161                         return ret;
 162         }
 163
 164         if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
 165                 ret = drv_set_csma_params(local, wpan_dev->min_be,
 166                                           wpan_dev->max_be,
 167                                           wpan_dev->csma_retries);
 168                 if (ret < 0)
 169                         return ret;
 170         }
 171
 172         if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
 173                 ret = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
 174                 if (ret < 0)
 175                         return ret;
 176         }
 177
 178         return 0;
 179 }
 180
 181 static int mac802154_slave_open(struct net_device *dev)
 182 {
 183         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 184         struct ieee802154_local *local = sdata->local;
 185         int res;
 186
 187         ASSERT_RTNL();
 188
 189         set_bit(SDATA_STATE_RUNNING, &sdata->state);
 190
 191         if (!local->open_count) {
 192                 res = ieee802154_setup_hw(sdata);
 193                 if (res)
 194                         goto err;
 195
 196                 res = drv_start(local, sdata->required_filtering,
 197                                 &local->addr_filt);
 198                 if (res)
 199                         goto err;
 200         }
 201
 202         local->open_count++;
 203         netif_start_queue(dev);
 204         return 0;
 205 err:
 206         /* might already be clear but that doesn't matter */
 207         clear_bit(SDATA_STATE_RUNNING, &sdata->state);
 208
 209         return res;
 210 }
 211
 212 static int
 213 ieee802154_check_mac_settings(struct ieee802154_local *local,
 214                               struct ieee802154_sub_if_data *sdata,
 215                               struct ieee802154_sub_if_data *nsdata)
 216 {
 217         struct wpan_dev *nwpan_dev = &nsdata->wpan_dev;
 218         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 219
 220         ASSERT_RTNL();
 221
 222         if (sdata->iface_default_filtering != nsdata->iface_default_filtering)
 223                 return -EBUSY;
 224
 225         if (local->hw.flags & IEEE802154_HW_AFILT) {
 226                 if (wpan_dev->pan_id != nwpan_dev->pan_id ||
 227                     wpan_dev->short_addr != nwpan_dev->short_addr ||
 228                     wpan_dev->extended_addr != nwpan_dev->extended_addr)
 229                         return -EBUSY;
 230         }
 231
 232         if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
 233                 if (wpan_dev->min_be != nwpan_dev->min_be ||
 234                     wpan_dev->max_be != nwpan_dev->max_be ||
 235                     wpan_dev->csma_retries != nwpan_dev->csma_retries)
 236                         return -EBUSY;
 237         }
 238
 239         if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
 240                 if (wpan_dev->frame_retries != nwpan_dev->frame_retries)
 241                         return -EBUSY;
 242         }
 243
 244         if (local->hw.flags & IEEE802154_HW_LBT) {
 245                 if (wpan_dev->lbt != nwpan_dev->lbt)
 246                         return -EBUSY;
 247         }
 248
 249         return 0;
 250 }
 251
 252 static int
 253 ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata,
 254                                   enum nl802154_iftype iftype)
 255 {
 256         struct ieee802154_local *local = sdata->local;
 257         struct ieee802154_sub_if_data *nsdata;
 258
 259         /* we hold the RTNL here so can safely walk the list */
 260         list_for_each_entry(nsdata, &local->interfaces, list) {
 261                 if (nsdata != sdata && ieee802154_sdata_running(nsdata)) {
 262                         int ret;
 263
 264                         /* TODO currently we don't support multiple node/coord
 265                          * types we need to run skb_clone at rx path. Check if
 266                          * there exist really an use case if we need to support
 267                          * multiple node/coord types at the same time.
 268                          */
 269                         if (sdata->wpan_dev.iftype != NL802154_IFTYPE_MONITOR &&
 270                             nsdata->wpan_dev.iftype != NL802154_IFTYPE_MONITOR)
 271                                 return -EBUSY;
 272
 273                         /* check all phy mac sublayer settings are the same.
 274                          * We have only one phy, different values makes trouble.
 275                          */
 276                         ret = ieee802154_check_mac_settings(local, sdata, nsdata);
 277                         if (ret < 0)
 278                                 return ret;
 279                 }
 280         }
 281
 282         return 0;
 283 }
 284
 285 static int mac802154_wpan_open(struct net_device *dev)
 286 {
 287         int rc;
 288         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 289         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 290
 291         rc = ieee802154_check_concurrent_iface(sdata, wpan_dev->iftype);
 292         if (rc < 0)
 293                 return rc;
 294
 295         return mac802154_slave_open(dev);
 296 }
 297
 298 static int mac802154_slave_close(struct net_device *dev)
 299 {
 300         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 301         struct ieee802154_local *local = sdata->local;
 302
 303         ASSERT_RTNL();
 304
 305         if (mac802154_is_scanning(local))
 306                 mac802154_abort_scan_locked(local, sdata);
 307
 308         if (mac802154_is_beaconing(local))
 309                 mac802154_stop_beacons_locked(local, sdata);
 310
 311         netif_stop_queue(dev);
 312         local->open_count--;
 313
 314         clear_bit(SDATA_STATE_RUNNING, &sdata->state);
 315
 316         if (!local->open_count)
 317                 ieee802154_stop_device(local);
 318
 319         return 0;
 320 }
 321
 322 static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
 323                                          struct ieee802154_hdr *hdr,
 324                                          const struct ieee802154_mac_cb *cb)
 325 {
 326         struct ieee802154_llsec_params params;
 327         u8 level;
 328
 329         mac802154_llsec_get_params(&sdata->sec, &params);
 330
 331         if (!params.enabled && cb->secen_override && cb->secen)
 332                 return -EINVAL;
 333         if (!params.enabled ||
 334             (cb->secen_override && !cb->secen) ||
 335             !params.out_level)
 336                 return 0;
 337         if (cb->seclevel_override && !cb->seclevel)
 338                 return -EINVAL;
 339
 340         level = cb->seclevel_override ? cb->seclevel : params.out_level;
 341
 342         hdr->fc.security_enabled = 1;
 343         hdr->sec.level = level;
 344         hdr->sec.key_id_mode = params.out_key.mode;
 345         if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
 346                 hdr->sec.short_src = params.out_key.short_source;
 347         else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
 348                 hdr->sec.extended_src = params.out_key.extended_source;
 349         hdr->sec.key_id = params.out_key.id;
 350
 351         return 0;
 352 }
 353
 354 static int ieee802154_header_create(struct sk_buff *skb,
 355                                     struct net_device *dev,
 356                                     const struct ieee802154_addr *daddr,
 357                                     const struct ieee802154_addr *saddr,
 358                                     unsigned len)
 359 {
 360         struct ieee802154_hdr hdr;
 361         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 362         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 363         struct ieee802154_mac_cb *cb = mac_cb(skb);
 364         int hlen;
 365
 366         if (!daddr)
 367                 return -EINVAL;
 368
 369         memset(&hdr.fc, 0, sizeof(hdr.fc));
 370         hdr.fc.type = cb->type;
 371         hdr.fc.security_enabled = cb->secen;
 372         hdr.fc.ack_request = cb->ackreq;
 373         hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF;
 374
 375         if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
 376                 return -EINVAL;
 377
 378         if (!saddr) {
 379                 if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) ||
 380                     wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) ||
 381                     wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
 382                         hdr.source.mode = IEEE802154_ADDR_LONG;
 383                         hdr.source.extended_addr = wpan_dev->extended_addr;
 384                 } else {
 385                         hdr.source.mode = IEEE802154_ADDR_SHORT;
 386                         hdr.source.short_addr = wpan_dev->short_addr;
 387                 }
 388
 389                 hdr.source.pan_id = wpan_dev->pan_id;
 390         } else {
 391                 hdr.source = *(const struct ieee802154_addr *)saddr;
 392         }
 393
 394         hdr.dest = *(const struct ieee802154_addr *)daddr;
 395
 396         hlen = ieee802154_hdr_push(skb, &hdr);
 397         if (hlen < 0)
 398                 return -EINVAL;
 399
 400         skb_reset_mac_header(skb);
 401         skb->mac_len = hlen;
 402
 403         if (len > ieee802154_max_payload(&hdr))
 404                 return -EMSGSIZE;
 405
 406         return hlen;
 407 }
 408
 409 static const struct wpan_dev_header_ops ieee802154_header_ops = {
 410         .create         = ieee802154_header_create,
 411 };
 412
 413 /* This header create functionality assumes a 8 byte array for
 414  * source and destination pointer at maximum. To adapt this for
 415  * the 802.15.4 dataframe header we use extended address handling
 416  * here only and intra pan connection. fc fields are mostly fallback
 417  * handling. For provide dev_hard_header for dgram sockets.
 418  */
 419 static int mac802154_header_create(struct sk_buff *skb,
 420                                    struct net_device *dev,
 421                                    unsigned short type,
 422                                    const void *daddr,
 423                                    const void *saddr,
 424                                    unsigned len)
 425 {
 426         struct ieee802154_hdr hdr;
 427         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 428         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 429         struct ieee802154_mac_cb cb = { };
 430         int hlen;
 431
 432         if (!daddr)
 433                 return -EINVAL;
 434
 435         memset(&hdr.fc, 0, sizeof(hdr.fc));
 436         hdr.fc.type = IEEE802154_FC_TYPE_DATA;
 437         hdr.fc.ack_request = wpan_dev->ackreq;
 438         hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF;
 439
 440         /* TODO currently a workaround to give zero cb block to set
 441          * security parameters defaults according MIB.
 442          */
 443         if (mac802154_set_header_security(sdata, &hdr, &cb) < 0)
 444                 return -EINVAL;
 445
 446         hdr.dest.pan_id = wpan_dev->pan_id;
 447         hdr.dest.mode = IEEE802154_ADDR_LONG;
 448         ieee802154_be64_to_le64(&hdr.dest.extended_addr, daddr);
 449
 450         hdr.source.pan_id = hdr.dest.pan_id;
 451         hdr.source.mode = IEEE802154_ADDR_LONG;
 452
 453         if (!saddr)
 454                 hdr.source.extended_addr = wpan_dev->extended_addr;
 455         else
 456                 ieee802154_be64_to_le64(&hdr.source.extended_addr, saddr);
 457
 458         hlen = ieee802154_hdr_push(skb, &hdr);
 459         if (hlen < 0)
 460                 return -EINVAL;
 461
 462         skb_reset_mac_header(skb);
 463         skb->mac_len = hlen;
 464
 465         if (len > ieee802154_max_payload(&hdr))
 466                 return -EMSGSIZE;
 467
 468         return hlen;
 469 }
 470
 471 static int
 472 mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr)
 473 {
 474         struct ieee802154_hdr hdr;
 475
 476         if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
 477                 pr_debug("malformed packet\n");
 478                 return 0;
 479         }
 480
 481         if (hdr.source.mode == IEEE802154_ADDR_LONG) {
 482                 ieee802154_le64_to_be64(haddr, &hdr.source.extended_addr);
 483                 return IEEE802154_EXTENDED_ADDR_LEN;
 484         }
 485
 486         return 0;
 487 }
 488
 489 static const struct header_ops mac802154_header_ops = {
 490         .create         = mac802154_header_create,
 491         .parse          = mac802154_header_parse,
 492 };
 493
 494 static const struct net_device_ops mac802154_wpan_ops = {
 495         .ndo_open               = mac802154_wpan_open,
 496         .ndo_stop               = mac802154_slave_close,
 497         .ndo_start_xmit         = ieee802154_subif_start_xmit,
 498         .ndo_do_ioctl           = mac802154_wpan_ioctl,
 499         .ndo_set_mac_address    = mac802154_wpan_mac_addr,
 500 };
 501
 502 static const struct net_device_ops mac802154_monitor_ops = {
 503         .ndo_open               = mac802154_wpan_open,
 504         .ndo_stop               = mac802154_slave_close,
 505         .ndo_start_xmit         = ieee802154_monitor_start_xmit,
 506 };
 507
 508 static void mac802154_wpan_free(struct net_device *dev)
 509 {
 510         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 511
 512         mac802154_llsec_destroy(&sdata->sec);
 513 }
 514
 515 static void ieee802154_if_setup(struct net_device *dev)
 516 {
 517         dev->addr_len           = IEEE802154_EXTENDED_ADDR_LEN;
 518         memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);
 519
 520         /* Let hard_header_len set to IEEE802154_MIN_HEADER_LEN. AF_PACKET
 521          * will not send frames without any payload, but ack frames
 522          * has no payload, so substract one that we can send a 3 bytes
 523          * frame. The xmit callback assumes at least a hard header where two
 524          * bytes fc and sequence field are set.
 525          */
 526         dev->hard_header_len    = IEEE802154_MIN_HEADER_LEN - 1;
 527         /* The auth_tag header is for security and places in private payload
 528          * room of mac frame which stucks between payload and FCS field.
 529          */
 530         dev->needed_tailroom    = IEEE802154_MAX_AUTH_TAG_LEN +
 531                                   IEEE802154_FCS_LEN;
 532         /* The mtu size is the payload without mac header in this case.
 533          * We have a dynamic length header with a minimum header length
 534          * which is hard_header_len. In this case we let mtu to the size
 535          * of maximum payload which is IEEE802154_MTU - IEEE802154_FCS_LEN -
 536          * hard_header_len. The FCS which is set by hardware or ndo_start_xmit
 537          * and the minimum mac header which can be evaluated inside driver
 538          * layer. The rest of mac header will be part of payload if greater
 539          * than hard_header_len.
 540          */
 541         dev->mtu                = IEEE802154_MTU - IEEE802154_FCS_LEN -
 542                                   dev->hard_header_len;
 543         dev->tx_queue_len       = 300;
 544         dev->flags              = IFF_NOARP | IFF_BROADCAST;
 545 }
 546
 547 static int
 548 ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata,
 549                        enum nl802154_iftype type)
 550 {
 551         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 552         int ret;
 553         u8 tmp;
 554
 555         /* set some type-dependent values */
 556         sdata->wpan_dev.iftype = type;
 557
 558         get_random_bytes(&tmp, sizeof(tmp));
 559         atomic_set(&wpan_dev->bsn, tmp);
 560         get_random_bytes(&tmp, sizeof(tmp));
 561         atomic_set(&wpan_dev->dsn, tmp);
 562
 563         /* defaults per 802.15.4-2011 */
 564         wpan_dev->min_be = 3;
 565         wpan_dev->max_be = 5;
 566         wpan_dev->csma_retries = 4;
 567         wpan_dev->frame_retries = 3;
 568
 569         wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
 570         wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
 571
 572         switch (type) {
 573         case NL802154_IFTYPE_COORD:
 574         case NL802154_IFTYPE_NODE:
 575                 ieee802154_be64_to_le64(&wpan_dev->extended_addr,
 576                                         sdata->dev->dev_addr);
 577
 578                 sdata->dev->header_ops = &mac802154_header_ops;
 579                 sdata->dev->needs_free_netdev = true;
 580                 sdata->dev->priv_destructor = mac802154_wpan_free;
 581                 sdata->dev->netdev_ops = &mac802154_wpan_ops;
 582                 sdata->dev->ml_priv = &mac802154_mlme_wpan;
 583                 sdata->iface_default_filtering = IEEE802154_FILTERING_4_FRAME_FIELDS;
 584                 wpan_dev->header_ops = &ieee802154_header_ops;
 585
 586                 mutex_init(&sdata->sec_mtx);
 587
 588                 mac802154_llsec_init(&sdata->sec);
 589                 ret = mac802154_wpan_update_llsec(sdata->dev);
 590                 if (ret < 0)
 591                         return ret;
 592
 593                 break;
 594         case NL802154_IFTYPE_MONITOR:
 595                 sdata->dev->needs_free_netdev = true;
 596                 sdata->dev->netdev_ops = &mac802154_monitor_ops;
 597                 sdata->iface_default_filtering = IEEE802154_FILTERING_NONE;
 598                 break;
 599         default:
 600                 BUG();
 601         }
 602
 603         return 0;
 604 }
 605
 606 struct net_device *
 607 ieee802154_if_add(struct ieee802154_local *local, const char *name,
 608                   unsigned char name_assign_type, enum nl802154_iftype type,
 609                   __le64 extended_addr)
 610 {
 611         u8 addr[IEEE802154_EXTENDED_ADDR_LEN];
 612         struct net_device *ndev = NULL;
 613         struct ieee802154_sub_if_data *sdata = NULL;
 614         int ret;
 615
 616         ASSERT_RTNL();
 617
 618         ndev = alloc_netdev(sizeof(*sdata), name,
 619                             name_assign_type, ieee802154_if_setup);
 620         if (!ndev)
 621                 return ERR_PTR(-ENOMEM);
 622
 623         ndev->needed_headroom = local->hw.extra_tx_headroom +
 624                                 IEEE802154_MAX_HEADER_LEN;
 625
 626         ret = dev_alloc_name(ndev, ndev->name);
 627         if (ret < 0)
 628                 goto err;
 629
 630         ieee802154_le64_to_be64(ndev->perm_addr,
 631                                 &local->hw.phy->perm_extended_addr);
 632         switch (type) {
 633         case NL802154_IFTYPE_COORD:
 634         case NL802154_IFTYPE_NODE:
 635                 ndev->type = ARPHRD_IEEE802154;
 636                 if (ieee802154_is_valid_extended_unicast_addr(extended_addr)) {
 637                         ieee802154_le64_to_be64(addr, &extended_addr);
 638                         dev_addr_set(ndev, addr);
 639                 } else {
 640                         dev_addr_set(ndev, ndev->perm_addr);
 641                 }
 642                 break;
 643         case NL802154_IFTYPE_MONITOR:
 644                 ndev->type = ARPHRD_IEEE802154_MONITOR;
 645                 break;
 646         default:
 647                 ret = -EINVAL;
 648                 goto err;
 649         }
 650
 651         /* TODO check this */
 652         SET_NETDEV_DEV(ndev, &local->phy->dev);
 653         dev_net_set(ndev, wpan_phy_net(local->hw.phy));
 654         sdata = netdev_priv(ndev);
 655         ndev->ieee802154_ptr = &sdata->wpan_dev;
 656         memcpy(sdata->name, ndev->name, IFNAMSIZ);
 657         sdata->dev = ndev;
 658         sdata->wpan_dev.wpan_phy = local->hw.phy;
 659         sdata->local = local;
 660         INIT_LIST_HEAD(&sdata->wpan_dev.list);
 661
 662         /* setup type-dependent data */
 663         ret = ieee802154_setup_sdata(sdata, type);
 664         if (ret)
 665                 goto err;
 666
 667         ret = register_netdevice(ndev);
 668         if (ret < 0)
 669                 goto err;
 670
 671         mutex_lock(&local->iflist_mtx);
 672         list_add_tail_rcu(&sdata->list, &local->interfaces);
 673         mutex_unlock(&local->iflist_mtx);
 674
 675         return ndev;
 676
 677 err:
 678         free_netdev(ndev);
 679         return ERR_PTR(ret);
 680 }
 681
 682 void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
 683 {
 684         ASSERT_RTNL();
 685
 686         mutex_lock(&sdata->local->iflist_mtx);
 687         list_del_rcu(&sdata->list);
 688         mutex_unlock(&sdata->local->iflist_mtx);
 689
 690         synchronize_rcu();
 691         unregister_netdevice(sdata->dev);
 692 }
 693
 694 void ieee802154_remove_interfaces(struct ieee802154_local *local)
 695 {
 696         struct ieee802154_sub_if_data *sdata, *tmp;
 697
 698         mutex_lock(&local->iflist_mtx);
 699         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
 700                 list_del(&sdata->list);
 701
 702                 unregister_netdevice(sdata->dev);
 703         }
 704         mutex_unlock(&local->iflist_mtx);
 705 }
 706
 707 static int netdev_notify(struct notifier_block *nb,
 708                          unsigned long state, void *ptr)
 709 {
 710         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
 711         struct ieee802154_sub_if_data *sdata;
 712
 713         if (state != NETDEV_CHANGENAME)
 714                 return NOTIFY_DONE;
 715
 716         if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy)
 717                 return NOTIFY_DONE;
 718
 719         if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid)
 720                 return NOTIFY_DONE;
 721
 722         sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 723         memcpy(sdata->name, dev->name, IFNAMSIZ);
 724
 725         return NOTIFY_OK;
 726 }
 727
 728 static struct notifier_block mac802154_netdev_notifier = {
 729         .notifier_call = netdev_notify,
 730 };
 731
 732 int ieee802154_iface_init(void)
 733 {
 734         return register_netdevice_notifier(&mac802154_netdev_notifier);
 735 }
 736
 737 void ieee802154_iface_exit(void)
 738 {
 739         unregister_netdevice_notifier(&mac802154_netdev_notifier);
 740 }