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         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
 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                 memcpy(sdata->wpan_dev.lowpan_dev->dev_addr, dev->dev_addr,
 140                        dev->addr_len);
 141
 142         return mac802154_wpan_update_llsec(dev);
 143 }
 144
 145 static int ieee802154_setup_hw(struct ieee802154_sub_if_data *sdata)
 146 {
 147         struct ieee802154_local *local = sdata->local;
 148         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 149         int ret;
 150
 151         if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
 152                 ret = drv_set_promiscuous_mode(local,
 153                                                wpan_dev->promiscuous_mode);
 154                 if (ret < 0)
 155                         return ret;
 156         }
 157
 158         if (local->hw.flags & IEEE802154_HW_AFILT) {
 159                 ret = drv_set_pan_id(local, wpan_dev->pan_id);
 160                 if (ret < 0)
 161                         return ret;
 162
 163                 ret = drv_set_extended_addr(local, wpan_dev->extended_addr);
 164                 if (ret < 0)
 165                         return ret;
 166
 167                 ret = drv_set_short_addr(local, wpan_dev->short_addr);
 168                 if (ret < 0)
 169                         return ret;
 170         }
 171
 172         if (local->hw.flags & IEEE802154_HW_LBT) {
 173                 ret = drv_set_lbt_mode(local, wpan_dev->lbt);
 174                 if (ret < 0)
 175                         return ret;
 176         }
 177
 178         if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
 179                 ret = drv_set_csma_params(local, wpan_dev->min_be,
 180                                           wpan_dev->max_be,
 181                                           wpan_dev->csma_retries);
 182                 if (ret < 0)
 183                         return ret;
 184         }
 185
 186         if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
 187                 ret = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
 188                 if (ret < 0)
 189                         return ret;
 190         }
 191
 192         return 0;
 193 }
 194
 195 static int mac802154_slave_open(struct net_device *dev)
 196 {
 197         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 198         struct ieee802154_local *local = sdata->local;
 199         int res;
 200
 201         ASSERT_RTNL();
 202
 203         set_bit(SDATA_STATE_RUNNING, &sdata->state);
 204
 205         if (!local->open_count) {
 206                 res = ieee802154_setup_hw(sdata);
 207                 if (res)
 208                         goto err;
 209
 210                 res = drv_start(local);
 211                 if (res)
 212                         goto err;
 213         }
 214
 215         local->open_count++;
 216         netif_start_queue(dev);
 217         return 0;
 218 err:
 219         /* might already be clear but that doesn't matter */
 220         clear_bit(SDATA_STATE_RUNNING, &sdata->state);
 221
 222         return res;
 223 }
 224
 225 static int
 226 ieee802154_check_mac_settings(struct ieee802154_local *local,
 227                               struct wpan_dev *wpan_dev,
 228                               struct wpan_dev *nwpan_dev)
 229 {
 230         ASSERT_RTNL();
 231
 232         if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
 233                 if (wpan_dev->promiscuous_mode != nwpan_dev->promiscuous_mode)
 234                         return -EBUSY;
 235         }
 236
 237         if (local->hw.flags & IEEE802154_HW_AFILT) {
 238                 if (wpan_dev->pan_id != nwpan_dev->pan_id ||
 239                     wpan_dev->short_addr != nwpan_dev->short_addr ||
 240                     wpan_dev->extended_addr != nwpan_dev->extended_addr)
 241                         return -EBUSY;
 242         }
 243
 244         if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
 245                 if (wpan_dev->min_be != nwpan_dev->min_be ||
 246                     wpan_dev->max_be != nwpan_dev->max_be ||
 247                     wpan_dev->csma_retries != nwpan_dev->csma_retries)
 248                         return -EBUSY;
 249         }
 250
 251         if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
 252                 if (wpan_dev->frame_retries != nwpan_dev->frame_retries)
 253                         return -EBUSY;
 254         }
 255
 256         if (local->hw.flags & IEEE802154_HW_LBT) {
 257                 if (wpan_dev->lbt != nwpan_dev->lbt)
 258                         return -EBUSY;
 259         }
 260
 261         return 0;
 262 }
 263
 264 static int
 265 ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata,
 266                                   enum nl802154_iftype iftype)
 267 {
 268         struct ieee802154_local *local = sdata->local;
 269         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 270         struct ieee802154_sub_if_data *nsdata;
 271
 272         /* we hold the RTNL here so can safely walk the list */
 273         list_for_each_entry(nsdata, &local->interfaces, list) {
 274                 if (nsdata != sdata && ieee802154_sdata_running(nsdata)) {
 275                         int ret;
 276
 277                         /* TODO currently we don't support multiple node types
 278                          * we need to run skb_clone at rx path. Check if there
 279                          * exist really an use case if we need to support
 280                          * multiple node types at the same time.
 281                          */
 282                         if (wpan_dev->iftype == NL802154_IFTYPE_NODE &&
 283                             nsdata->wpan_dev.iftype == NL802154_IFTYPE_NODE)
 284                                 return -EBUSY;
 285
 286                         /* check all phy mac sublayer settings are the same.
 287                          * We have only one phy, different values makes trouble.
 288                          */
 289                         ret = ieee802154_check_mac_settings(local, wpan_dev,
 290                                                             &nsdata->wpan_dev);
 291                         if (ret < 0)
 292                                 return ret;
 293                 }
 294         }
 295
 296         return 0;
 297 }
 298
 299 static int mac802154_wpan_open(struct net_device *dev)
 300 {
 301         int rc;
 302         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 303         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 304
 305         rc = ieee802154_check_concurrent_iface(sdata, wpan_dev->iftype);
 306         if (rc < 0)
 307                 return rc;
 308
 309         return mac802154_slave_open(dev);
 310 }
 311
 312 static int mac802154_slave_close(struct net_device *dev)
 313 {
 314         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 315         struct ieee802154_local *local = sdata->local;
 316
 317         ASSERT_RTNL();
 318
 319         netif_stop_queue(dev);
 320         local->open_count--;
 321
 322         clear_bit(SDATA_STATE_RUNNING, &sdata->state);
 323
 324         if (!local->open_count)
 325                 ieee802154_stop_device(local);
 326
 327         return 0;
 328 }
 329
 330 static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
 331                                          struct ieee802154_hdr *hdr,
 332                                          const struct ieee802154_mac_cb *cb)
 333 {
 334         struct ieee802154_llsec_params params;
 335         u8 level;
 336
 337         mac802154_llsec_get_params(&sdata->sec, &params);
 338
 339         if (!params.enabled && cb->secen_override && cb->secen)
 340                 return -EINVAL;
 341         if (!params.enabled ||
 342             (cb->secen_override && !cb->secen) ||
 343             !params.out_level)
 344                 return 0;
 345         if (cb->seclevel_override && !cb->seclevel)
 346                 return -EINVAL;
 347
 348         level = cb->seclevel_override ? cb->seclevel : params.out_level;
 349
 350         hdr->fc.security_enabled = 1;
 351         hdr->sec.level = level;
 352         hdr->sec.key_id_mode = params.out_key.mode;
 353         if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
 354                 hdr->sec.short_src = params.out_key.short_source;
 355         else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
 356                 hdr->sec.extended_src = params.out_key.extended_source;
 357         hdr->sec.key_id = params.out_key.id;
 358
 359         return 0;
 360 }
 361
 362 static int ieee802154_header_create(struct sk_buff *skb,
 363                                     struct net_device *dev,
 364                                     const struct ieee802154_addr *daddr,
 365                                     const struct ieee802154_addr *saddr,
 366                                     unsigned len)
 367 {
 368         struct ieee802154_hdr hdr;
 369         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 370         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 371         struct ieee802154_mac_cb *cb = mac_cb(skb);
 372         int hlen;
 373
 374         if (!daddr)
 375                 return -EINVAL;
 376
 377         memset(&hdr.fc, 0, sizeof(hdr.fc));
 378         hdr.fc.type = cb->type;
 379         hdr.fc.security_enabled = cb->secen;
 380         hdr.fc.ack_request = cb->ackreq;
 381         hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF;
 382
 383         if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
 384                 return -EINVAL;
 385
 386         if (!saddr) {
 387                 if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) ||
 388                     wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) ||
 389                     wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
 390                         hdr.source.mode = IEEE802154_ADDR_LONG;
 391                         hdr.source.extended_addr = wpan_dev->extended_addr;
 392                 } else {
 393                         hdr.source.mode = IEEE802154_ADDR_SHORT;
 394                         hdr.source.short_addr = wpan_dev->short_addr;
 395                 }
 396
 397                 hdr.source.pan_id = wpan_dev->pan_id;
 398         } else {
 399                 hdr.source = *(const struct ieee802154_addr *)saddr;
 400         }
 401
 402         hdr.dest = *(const struct ieee802154_addr *)daddr;
 403
 404         hlen = ieee802154_hdr_push(skb, &hdr);
 405         if (hlen < 0)
 406                 return -EINVAL;
 407
 408         skb_reset_mac_header(skb);
 409         skb->mac_len = hlen;
 410
 411         if (len > ieee802154_max_payload(&hdr))
 412                 return -EMSGSIZE;
 413
 414         return hlen;
 415 }
 416
 417 static const struct wpan_dev_header_ops ieee802154_header_ops = {
 418         .create         = ieee802154_header_create,
 419 };
 420
 421 /* This header create functionality assumes a 8 byte array for
 422  * source and destination pointer at maximum. To adapt this for
 423  * the 802.15.4 dataframe header we use extended address handling
 424  * here only and intra pan connection. fc fields are mostly fallback
 425  * handling. For provide dev_hard_header for dgram sockets.
 426  */
 427 static int mac802154_header_create(struct sk_buff *skb,
 428                                    struct net_device *dev,
 429                                    unsigned short type,
 430                                    const void *daddr,
 431                                    const void *saddr,
 432                                    unsigned len)
 433 {
 434         struct ieee802154_hdr hdr;
 435         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 436         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 437         struct ieee802154_mac_cb cb = { };
 438         int hlen;
 439
 440         if (!daddr)
 441                 return -EINVAL;
 442
 443         memset(&hdr.fc, 0, sizeof(hdr.fc));
 444         hdr.fc.type = IEEE802154_FC_TYPE_DATA;
 445         hdr.fc.ack_request = wpan_dev->ackreq;
 446         hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF;
 447
 448         /* TODO currently a workaround to give zero cb block to set
 449          * security parameters defaults according MIB.
 450          */
 451         if (mac802154_set_header_security(sdata, &hdr, &cb) < 0)
 452                 return -EINVAL;
 453
 454         hdr.dest.pan_id = wpan_dev->pan_id;
 455         hdr.dest.mode = IEEE802154_ADDR_LONG;
 456         ieee802154_be64_to_le64(&hdr.dest.extended_addr, daddr);
 457
 458         hdr.source.pan_id = hdr.dest.pan_id;
 459         hdr.source.mode = IEEE802154_ADDR_LONG;
 460
 461         if (!saddr)
 462                 hdr.source.extended_addr = wpan_dev->extended_addr;
 463         else
 464                 ieee802154_be64_to_le64(&hdr.source.extended_addr, saddr);
 465
 466         hlen = ieee802154_hdr_push(skb, &hdr);
 467         if (hlen < 0)
 468                 return -EINVAL;
 469
 470         skb_reset_mac_header(skb);
 471         skb->mac_len = hlen;
 472
 473         if (len > ieee802154_max_payload(&hdr))
 474                 return -EMSGSIZE;
 475
 476         return hlen;
 477 }
 478
 479 static int
 480 mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr)
 481 {
 482         struct ieee802154_hdr hdr;
 483
 484         if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
 485                 pr_debug("malformed packet\n");
 486                 return 0;
 487         }
 488
 489         if (hdr.source.mode == IEEE802154_ADDR_LONG) {
 490                 ieee802154_le64_to_be64(haddr, &hdr.source.extended_addr);
 491                 return IEEE802154_EXTENDED_ADDR_LEN;
 492         }
 493
 494         return 0;
 495 }
 496
 497 static const struct header_ops mac802154_header_ops = {
 498         .create         = mac802154_header_create,
 499         .parse          = mac802154_header_parse,
 500 };
 501
 502 static const struct net_device_ops mac802154_wpan_ops = {
 503         .ndo_open               = mac802154_wpan_open,
 504         .ndo_stop               = mac802154_slave_close,
 505         .ndo_start_xmit         = ieee802154_subif_start_xmit,
 506         .ndo_do_ioctl           = mac802154_wpan_ioctl,
 507         .ndo_set_mac_address    = mac802154_wpan_mac_addr,
 508 };
 509
 510 static const struct net_device_ops mac802154_monitor_ops = {
 511         .ndo_open               = mac802154_wpan_open,
 512         .ndo_stop               = mac802154_slave_close,
 513         .ndo_start_xmit         = ieee802154_monitor_start_xmit,
 514 };
 515
 516 static void mac802154_wpan_free(struct net_device *dev)
 517 {
 518         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 519
 520         mac802154_llsec_destroy(&sdata->sec);
 521 }
 522
 523 static void ieee802154_if_setup(struct net_device *dev)
 524 {
 525         dev->addr_len           = IEEE802154_EXTENDED_ADDR_LEN;
 526         memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);
 527
 528         /* Let hard_header_len set to IEEE802154_MIN_HEADER_LEN. AF_PACKET
 529          * will not send frames without any payload, but ack frames
 530          * has no payload, so substract one that we can send a 3 bytes
 531          * frame. The xmit callback assumes at least a hard header where two
 532          * bytes fc and sequence field are set.
 533          */
 534         dev->hard_header_len    = IEEE802154_MIN_HEADER_LEN - 1;
 535         /* The auth_tag header is for security and places in private payload
 536          * room of mac frame which stucks between payload and FCS field.
 537          */
 538         dev->needed_tailroom    = IEEE802154_MAX_AUTH_TAG_LEN +
 539                                   IEEE802154_FCS_LEN;
 540         /* The mtu size is the payload without mac header in this case.
 541          * We have a dynamic length header with a minimum header length
 542          * which is hard_header_len. In this case we let mtu to the size
 543          * of maximum payload which is IEEE802154_MTU - IEEE802154_FCS_LEN -
 544          * hard_header_len. The FCS which is set by hardware or ndo_start_xmit
 545          * and the minimum mac header which can be evaluated inside driver
 546          * layer. The rest of mac header will be part of payload if greater
 547          * than hard_header_len.
 548          */
 549         dev->mtu                = IEEE802154_MTU - IEEE802154_FCS_LEN -
 550                                   dev->hard_header_len;
 551         dev->tx_queue_len       = 300;
 552         dev->flags              = IFF_NOARP | IFF_BROADCAST;
 553 }
 554
 555 static int
 556 ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata,
 557                        enum nl802154_iftype type)
 558 {
 559         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 560         int ret;
 561         u8 tmp;
 562
 563         /* set some type-dependent values */
 564         sdata->wpan_dev.iftype = type;
 565
 566         get_random_bytes(&tmp, sizeof(tmp));
 567         atomic_set(&wpan_dev->bsn, tmp);
 568         get_random_bytes(&tmp, sizeof(tmp));
 569         atomic_set(&wpan_dev->dsn, tmp);
 570
 571         /* defaults per 802.15.4-2011 */
 572         wpan_dev->min_be = 3;
 573         wpan_dev->max_be = 5;
 574         wpan_dev->csma_retries = 4;
 575         wpan_dev->frame_retries = 3;
 576
 577         wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
 578         wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
 579
 580         switch (type) {
 581         case NL802154_IFTYPE_NODE:
 582                 ieee802154_be64_to_le64(&wpan_dev->extended_addr,
 583                                         sdata->dev->dev_addr);
 584
 585                 sdata->dev->header_ops = &mac802154_header_ops;
 586                 sdata->dev->needs_free_netdev = true;
 587                 sdata->dev->priv_destructor = mac802154_wpan_free;
 588                 sdata->dev->netdev_ops = &mac802154_wpan_ops;
 589                 sdata->dev->ml_priv = &mac802154_mlme_wpan;
 590                 wpan_dev->promiscuous_mode = false;
 591                 wpan_dev->header_ops = &ieee802154_header_ops;
 592
 593                 mutex_init(&sdata->sec_mtx);
 594
 595                 mac802154_llsec_init(&sdata->sec);
 596                 ret = mac802154_wpan_update_llsec(sdata->dev);
 597                 if (ret < 0)
 598                         return ret;
 599
 600                 break;
 601         case NL802154_IFTYPE_MONITOR:
 602                 sdata->dev->needs_free_netdev = true;
 603                 sdata->dev->netdev_ops = &mac802154_monitor_ops;
 604                 wpan_dev->promiscuous_mode = true;
 605                 break;
 606         default:
 607                 BUG();
 608         }
 609
 610         return 0;
 611 }
 612
 613 struct net_device *
 614 ieee802154_if_add(struct ieee802154_local *local, const char *name,
 615                   unsigned char name_assign_type, enum nl802154_iftype type,
 616                   __le64 extended_addr)
 617 {
 618         struct net_device *ndev = NULL;
 619         struct ieee802154_sub_if_data *sdata = NULL;
 620         int ret = -ENOMEM;
 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(ndev->dev_addr, &extended_addr);
 643                 else
 644                         memcpy(ndev->dev_addr, ndev->perm_addr,
 645                                IEEE802154_EXTENDED_ADDR_LEN);
 646                 break;
 647         case NL802154_IFTYPE_MONITOR:
 648                 ndev->type = ARPHRD_IEEE802154_MONITOR;
 649                 break;
 650         default:
 651                 ret = -EINVAL;
 652                 goto err;
 653         }
 654
 655         /* TODO check this */
 656         SET_NETDEV_DEV(ndev, &local->phy->dev);
 657         dev_net_set(ndev, wpan_phy_net(local->hw.phy));
 658         sdata = netdev_priv(ndev);
 659         ndev->ieee802154_ptr = &sdata->wpan_dev;
 660         memcpy(sdata->name, ndev->name, IFNAMSIZ);
 661         sdata->dev = ndev;
 662         sdata->wpan_dev.wpan_phy = local->hw.phy;
 663         sdata->local = local;
 664
 665         /* setup type-dependent data */
 666         ret = ieee802154_setup_sdata(sdata, type);
 667         if (ret)
 668                 goto err;
 669
 670         ret = register_netdevice(ndev);
 671         if (ret < 0)
 672                 goto err;
 673
 674         mutex_lock(&local->iflist_mtx);
 675         list_add_tail_rcu(&sdata->list, &local->interfaces);
 676         mutex_unlock(&local->iflist_mtx);
 677
 678         return ndev;
 679
 680 err:
 681         free_netdev(ndev);
 682         return ERR_PTR(ret);
 683 }
 684
 685 void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
 686 {
 687         ASSERT_RTNL();
 688
 689         mutex_lock(&sdata->local->iflist_mtx);
 690         list_del_rcu(&sdata->list);
 691         mutex_unlock(&sdata->local->iflist_mtx);
 692
 693         synchronize_rcu();
 694         unregister_netdevice(sdata->dev);
 695 }
 696
 697 void ieee802154_remove_interfaces(struct ieee802154_local *local)
 698 {
 699         struct ieee802154_sub_if_data *sdata, *tmp;
 700
 701         mutex_lock(&local->iflist_mtx);
 702         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
 703                 list_del(&sdata->list);
 704
 705                 unregister_netdevice(sdata->dev);
 706         }
 707         mutex_unlock(&local->iflist_mtx);
 708 }
 709
 710 static int netdev_notify(struct notifier_block *nb,
 711                          unsigned long state, void *ptr)
 712 {
 713         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
 714         struct ieee802154_sub_if_data *sdata;
 715
 716         if (state != NETDEV_CHANGENAME)
 717                 return NOTIFY_DONE;
 718
 719         if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy)
 720                 return NOTIFY_DONE;
 721
 722         if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid)
 723                 return NOTIFY_DONE;
 724
 725         sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 726         memcpy(sdata->name, dev->name, IFNAMSIZ);
 727
 728         return NOTIFY_OK;
 729 }
 730
 731 static struct notifier_block mac802154_netdev_notifier = {
 732         .notifier_call = netdev_notify,
 733 };
 734
 735 int ieee802154_iface_init(void)
 736 {
 737         return register_netdevice_notifier(&mac802154_netdev_notifier);
 738 }
 739
 740 void ieee802154_iface_exit(void)
 741 {
 742         unregister_netdevice_notifier(&mac802154_netdev_notifier);
 743 }