net/ieee802154/nl-mac.c

   1 /*
   2  * Netlink inteface for IEEE 802.15.4 stack
   3  *
   4  * Copyright 2007, 2008 Siemens AG
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Written by:
  20  * Sergey Lapin <slapin@ossfans.org>
  21  * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
  22  * Maxim Osipov <maxim.osipov@siemens.com>
  23  */
  24
  25 #include <linux/gfp.h>
  26 #include <linux/kernel.h>
  27 #include <linux/if_arp.h>
  28 #include <linux/netdevice.h>
  29 #include <net/netlink.h>
  30 #include <net/genetlink.h>
  31 #include <net/sock.h>
  32 #include <linux/nl802154.h>
  33 #include <linux/export.h>
  34 #include <net/af_ieee802154.h>
  35 #include <net/nl802154.h>
  36 #include <net/ieee802154.h>
  37 #include <net/ieee802154_netdev.h>
  38 #include <net/wpan-phy.h>
  39
  40 #include "ieee802154.h"
  41
  42 int ieee802154_nl_assoc_indic(struct net_device *dev,
  43                 struct ieee802154_addr *addr, u8 cap)
  44 {
  45         struct sk_buff *msg;
  46
  47         pr_debug("%s\n", __func__);
  48
  49         if (addr->addr_type != IEEE802154_ADDR_LONG) {
  50                 pr_err("%s: received non-long source address!\n", __func__);
  51                 return -EINVAL;
  52         }
  53
  54         msg = ieee802154_nl_create(0, IEEE802154_ASSOCIATE_INDIC);
  55         if (!msg)
  56                 return -ENOBUFS;
  57
  58         if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
  59             nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
  60             nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
  61                     dev->dev_addr) ||
  62             nla_put(msg, IEEE802154_ATTR_SRC_HW_ADDR, IEEE802154_ADDR_LEN,
  63                     addr->hwaddr) ||
  64             nla_put_u8(msg, IEEE802154_ATTR_CAPABILITY, cap))
  65                 goto nla_put_failure;
  66
  67         return ieee802154_nl_mcast(msg, IEEE802154_COORD_MCGRP);
  68
  69 nla_put_failure:
  70         nlmsg_free(msg);
  71         return -ENOBUFS;
  72 }
  73 EXPORT_SYMBOL(ieee802154_nl_assoc_indic);
  74
  75 int ieee802154_nl_assoc_confirm(struct net_device *dev, u16 short_addr,
  76                 u8 status)
  77 {
  78         struct sk_buff *msg;
  79
  80         pr_debug("%s\n", __func__);
  81
  82         msg = ieee802154_nl_create(0, IEEE802154_ASSOCIATE_CONF);
  83         if (!msg)
  84                 return -ENOBUFS;
  85
  86         if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
  87             nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
  88             nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
  89                     dev->dev_addr) ||
  90             nla_put_u16(msg, IEEE802154_ATTR_SHORT_ADDR, short_addr) ||
  91             nla_put_u8(msg, IEEE802154_ATTR_STATUS, status))
  92                 goto nla_put_failure;
  93         return ieee802154_nl_mcast(msg, IEEE802154_COORD_MCGRP);
  94
  95 nla_put_failure:
  96         nlmsg_free(msg);
  97         return -ENOBUFS;
  98 }
  99 EXPORT_SYMBOL(ieee802154_nl_assoc_confirm);
 100
 101 int ieee802154_nl_disassoc_indic(struct net_device *dev,
 102                 struct ieee802154_addr *addr, u8 reason)
 103 {
 104         struct sk_buff *msg;
 105
 106         pr_debug("%s\n", __func__);
 107
 108         msg = ieee802154_nl_create(0, IEEE802154_DISASSOCIATE_INDIC);
 109         if (!msg)
 110                 return -ENOBUFS;
 111
 112         if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
 113             nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
 114             nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 115                     dev->dev_addr))
 116                 goto nla_put_failure;
 117         if (addr->addr_type == IEEE802154_ADDR_LONG) {
 118                 if (nla_put(msg, IEEE802154_ATTR_SRC_HW_ADDR, IEEE802154_ADDR_LEN,
 119                             addr->hwaddr))
 120                         goto nla_put_failure;
 121         } else {
 122                 if (nla_put_u16(msg, IEEE802154_ATTR_SRC_SHORT_ADDR,
 123                                 addr->short_addr))
 124                         goto nla_put_failure;
 125         }
 126         if (nla_put_u8(msg, IEEE802154_ATTR_REASON, reason))
 127                 goto nla_put_failure;
 128         return ieee802154_nl_mcast(msg, IEEE802154_COORD_MCGRP);
 129
 130 nla_put_failure:
 131         nlmsg_free(msg);
 132         return -ENOBUFS;
 133 }
 134 EXPORT_SYMBOL(ieee802154_nl_disassoc_indic);
 135
 136 int ieee802154_nl_disassoc_confirm(struct net_device *dev, u8 status)
 137 {
 138         struct sk_buff *msg;
 139
 140         pr_debug("%s\n", __func__);
 141
 142         msg = ieee802154_nl_create(0, IEEE802154_DISASSOCIATE_CONF);
 143         if (!msg)
 144                 return -ENOBUFS;
 145
 146         if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
 147             nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
 148             nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 149                     dev->dev_addr) ||
 150             nla_put_u8(msg, IEEE802154_ATTR_STATUS, status))
 151                 goto nla_put_failure;
 152         return ieee802154_nl_mcast(msg, IEEE802154_COORD_MCGRP);
 153
 154 nla_put_failure:
 155         nlmsg_free(msg);
 156         return -ENOBUFS;
 157 }
 158 EXPORT_SYMBOL(ieee802154_nl_disassoc_confirm);
 159
 160 int ieee802154_nl_beacon_indic(struct net_device *dev,
 161                 u16 panid, u16 coord_addr)
 162 {
 163         struct sk_buff *msg;
 164
 165         pr_debug("%s\n", __func__);
 166
 167         msg = ieee802154_nl_create(0, IEEE802154_BEACON_NOTIFY_INDIC);
 168         if (!msg)
 169                 return -ENOBUFS;
 170
 171         if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
 172             nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
 173             nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 174                     dev->dev_addr) ||
 175             nla_put_u16(msg, IEEE802154_ATTR_COORD_SHORT_ADDR, coord_addr) ||
 176             nla_put_u16(msg, IEEE802154_ATTR_COORD_PAN_ID, panid))
 177                 goto nla_put_failure;
 178         return ieee802154_nl_mcast(msg, IEEE802154_COORD_MCGRP);
 179
 180 nla_put_failure:
 181         nlmsg_free(msg);
 182         return -ENOBUFS;
 183 }
 184 EXPORT_SYMBOL(ieee802154_nl_beacon_indic);
 185
 186 int ieee802154_nl_scan_confirm(struct net_device *dev,
 187                 u8 status, u8 scan_type, u32 unscanned, u8 page,
 188                 u8 *edl/* , struct list_head *pan_desc_list */)
 189 {
 190         struct sk_buff *msg;
 191
 192         pr_debug("%s\n", __func__);
 193
 194         msg = ieee802154_nl_create(0, IEEE802154_SCAN_CONF);
 195         if (!msg)
 196                 return -ENOBUFS;
 197
 198         if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
 199             nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
 200             nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 201                     dev->dev_addr) ||
 202             nla_put_u8(msg, IEEE802154_ATTR_STATUS, status) ||
 203             nla_put_u8(msg, IEEE802154_ATTR_SCAN_TYPE, scan_type) ||
 204             nla_put_u32(msg, IEEE802154_ATTR_CHANNELS, unscanned) ||
 205             nla_put_u8(msg, IEEE802154_ATTR_PAGE, page) ||
 206             (edl &&
 207              nla_put(msg, IEEE802154_ATTR_ED_LIST, 27, edl)))
 208                 goto nla_put_failure;
 209         return ieee802154_nl_mcast(msg, IEEE802154_COORD_MCGRP);
 210
 211 nla_put_failure:
 212         nlmsg_free(msg);
 213         return -ENOBUFS;
 214 }
 215 EXPORT_SYMBOL(ieee802154_nl_scan_confirm);
 216
 217 int ieee802154_nl_start_confirm(struct net_device *dev, u8 status)
 218 {
 219         struct sk_buff *msg;
 220
 221         pr_debug("%s\n", __func__);
 222
 223         msg = ieee802154_nl_create(0, IEEE802154_START_CONF);
 224         if (!msg)
 225                 return -ENOBUFS;
 226
 227         if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
 228             nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
 229             nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 230                     dev->dev_addr) ||
 231             nla_put_u8(msg, IEEE802154_ATTR_STATUS, status))
 232                 goto nla_put_failure;
 233         return ieee802154_nl_mcast(msg, IEEE802154_COORD_MCGRP);
 234
 235 nla_put_failure:
 236         nlmsg_free(msg);
 237         return -ENOBUFS;
 238 }
 239 EXPORT_SYMBOL(ieee802154_nl_start_confirm);
 240
 241 static int ieee802154_nl_fill_iface(struct sk_buff *msg, u32 portid,
 242         u32 seq, int flags, struct net_device *dev)
 243 {
 244         void *hdr;
 245         struct wpan_phy *phy;
 246
 247         pr_debug("%s\n", __func__);
 248
 249         hdr = genlmsg_put(msg, 0, seq, &nl802154_family, flags,
 250                 IEEE802154_LIST_IFACE);
 251         if (!hdr)
 252                 goto out;
 253
 254         phy = ieee802154_mlme_ops(dev)->get_phy(dev);
 255         BUG_ON(!phy);
 256
 257         if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
 258             nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) ||
 259             nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
 260             nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 261                     dev->dev_addr) ||
 262             nla_put_u16(msg, IEEE802154_ATTR_SHORT_ADDR,
 263                         ieee802154_mlme_ops(dev)->get_short_addr(dev)) ||
 264             nla_put_u16(msg, IEEE802154_ATTR_PAN_ID,
 265                         ieee802154_mlme_ops(dev)->get_pan_id(dev)))
 266                 goto nla_put_failure;
 267         wpan_phy_put(phy);
 268         return genlmsg_end(msg, hdr);
 269
 270 nla_put_failure:
 271         wpan_phy_put(phy);
 272         genlmsg_cancel(msg, hdr);
 273 out:
 274         return -EMSGSIZE;
 275 }
 276
 277 /* Requests from userspace */
 278 static struct net_device *ieee802154_nl_get_dev(struct genl_info *info)
 279 {
 280         struct net_device *dev;
 281
 282         if (info->attrs[IEEE802154_ATTR_DEV_NAME]) {
 283                 char name[IFNAMSIZ + 1];
 284                 nla_strlcpy(name, info->attrs[IEEE802154_ATTR_DEV_NAME],
 285                                 sizeof(name));
 286                 dev = dev_get_by_name(&init_net, name);
 287         } else if (info->attrs[IEEE802154_ATTR_DEV_INDEX])
 288                 dev = dev_get_by_index(&init_net,
 289                         nla_get_u32(info->attrs[IEEE802154_ATTR_DEV_INDEX]));
 290         else
 291                 return NULL;
 292
 293         if (!dev)
 294                 return NULL;
 295
 296         if (dev->type != ARPHRD_IEEE802154) {
 297                 dev_put(dev);
 298                 return NULL;
 299         }
 300
 301         return dev;
 302 }
 303
 304 int ieee802154_associate_req(struct sk_buff *skb, struct genl_info *info)
 305 {
 306         struct net_device *dev;
 307         struct ieee802154_addr addr;
 308         u8 page;
 309         int ret = -EOPNOTSUPP;
 310
 311         if (!info->attrs[IEEE802154_ATTR_CHANNEL] ||
 312             !info->attrs[IEEE802154_ATTR_COORD_PAN_ID] ||
 313             (!info->attrs[IEEE802154_ATTR_COORD_HW_ADDR] &&
 314                 !info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]) ||
 315             !info->attrs[IEEE802154_ATTR_CAPABILITY])
 316                 return -EINVAL;
 317
 318         dev = ieee802154_nl_get_dev(info);
 319         if (!dev)
 320                 return -ENODEV;
 321         if (!ieee802154_mlme_ops(dev)->assoc_req)
 322                 goto out;
 323
 324         if (info->attrs[IEEE802154_ATTR_COORD_HW_ADDR]) {
 325                 addr.addr_type = IEEE802154_ADDR_LONG;
 326                 nla_memcpy(addr.hwaddr,
 327                                 info->attrs[IEEE802154_ATTR_COORD_HW_ADDR],
 328                                 IEEE802154_ADDR_LEN);
 329         } else {
 330                 addr.addr_type = IEEE802154_ADDR_SHORT;
 331                 addr.short_addr = nla_get_u16(
 332                                 info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]);
 333         }
 334         addr.pan_id = nla_get_u16(info->attrs[IEEE802154_ATTR_COORD_PAN_ID]);
 335
 336         if (info->attrs[IEEE802154_ATTR_PAGE])
 337                 page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
 338         else
 339                 page = 0;
 340
 341         ret = ieee802154_mlme_ops(dev)->assoc_req(dev, &addr,
 342                         nla_get_u8(info->attrs[IEEE802154_ATTR_CHANNEL]),
 343                         page,
 344                         nla_get_u8(info->attrs[IEEE802154_ATTR_CAPABILITY]));
 345
 346 out:
 347         dev_put(dev);
 348         return ret;
 349 }
 350
 351 int ieee802154_associate_resp(struct sk_buff *skb, struct genl_info *info)
 352 {
 353         struct net_device *dev;
 354         struct ieee802154_addr addr;
 355         int ret = -EOPNOTSUPP;
 356
 357         if (!info->attrs[IEEE802154_ATTR_STATUS] ||
 358             !info->attrs[IEEE802154_ATTR_DEST_HW_ADDR] ||
 359             !info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR])
 360                 return -EINVAL;
 361
 362         dev = ieee802154_nl_get_dev(info);
 363         if (!dev)
 364                 return -ENODEV;
 365         if (!ieee802154_mlme_ops(dev)->assoc_resp)
 366                 goto out;
 367
 368         addr.addr_type = IEEE802154_ADDR_LONG;
 369         nla_memcpy(addr.hwaddr, info->attrs[IEEE802154_ATTR_DEST_HW_ADDR],
 370                         IEEE802154_ADDR_LEN);
 371         addr.pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
 372
 373
 374         ret = ieee802154_mlme_ops(dev)->assoc_resp(dev, &addr,
 375                 nla_get_u16(info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]),
 376                 nla_get_u8(info->attrs[IEEE802154_ATTR_STATUS]));
 377
 378 out:
 379         dev_put(dev);
 380         return ret;
 381 }
 382
 383 int ieee802154_disassociate_req(struct sk_buff *skb, struct genl_info *info)
 384 {
 385         struct net_device *dev;
 386         struct ieee802154_addr addr;
 387         int ret = -EOPNOTSUPP;
 388
 389         if ((!info->attrs[IEEE802154_ATTR_DEST_HW_ADDR] &&
 390                 !info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]) ||
 391             !info->attrs[IEEE802154_ATTR_REASON])
 392                 return -EINVAL;
 393
 394         dev = ieee802154_nl_get_dev(info);
 395         if (!dev)
 396                 return -ENODEV;
 397         if (!ieee802154_mlme_ops(dev)->disassoc_req)
 398                 goto out;
 399
 400         if (info->attrs[IEEE802154_ATTR_DEST_HW_ADDR]) {
 401                 addr.addr_type = IEEE802154_ADDR_LONG;
 402                 nla_memcpy(addr.hwaddr,
 403                                 info->attrs[IEEE802154_ATTR_DEST_HW_ADDR],
 404                                 IEEE802154_ADDR_LEN);
 405         } else {
 406                 addr.addr_type = IEEE802154_ADDR_SHORT;
 407                 addr.short_addr = nla_get_u16(
 408                                 info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]);
 409         }
 410         addr.pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
 411
 412         ret = ieee802154_mlme_ops(dev)->disassoc_req(dev, &addr,
 413                         nla_get_u8(info->attrs[IEEE802154_ATTR_REASON]));
 414
 415 out:
 416         dev_put(dev);
 417         return ret;
 418 }
 419
 420 /*
 421  * PANid, channel, beacon_order = 15, superframe_order = 15,
 422  * PAN_coordinator, battery_life_extension = 0,
 423  * coord_realignment = 0, security_enable = 0
 424 */
 425 int ieee802154_start_req(struct sk_buff *skb, struct genl_info *info)
 426 {
 427         struct net_device *dev;
 428         struct ieee802154_addr addr;
 429
 430         u8 channel, bcn_ord, sf_ord;
 431         u8 page;
 432         int pan_coord, blx, coord_realign;
 433         int ret = -EOPNOTSUPP;
 434
 435         if (!info->attrs[IEEE802154_ATTR_COORD_PAN_ID] ||
 436             !info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR] ||
 437             !info->attrs[IEEE802154_ATTR_CHANNEL] ||
 438             !info->attrs[IEEE802154_ATTR_BCN_ORD] ||
 439             !info->attrs[IEEE802154_ATTR_SF_ORD] ||
 440             !info->attrs[IEEE802154_ATTR_PAN_COORD] ||
 441             !info->attrs[IEEE802154_ATTR_BAT_EXT] ||
 442             !info->attrs[IEEE802154_ATTR_COORD_REALIGN]
 443          )
 444                 return -EINVAL;
 445
 446         dev = ieee802154_nl_get_dev(info);
 447         if (!dev)
 448                 return -ENODEV;
 449         if (!ieee802154_mlme_ops(dev)->start_req)
 450                 goto out;
 451
 452         addr.addr_type = IEEE802154_ADDR_SHORT;
 453         addr.short_addr = nla_get_u16(
 454                         info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]);
 455         addr.pan_id = nla_get_u16(info->attrs[IEEE802154_ATTR_COORD_PAN_ID]);
 456
 457         channel = nla_get_u8(info->attrs[IEEE802154_ATTR_CHANNEL]);
 458         bcn_ord = nla_get_u8(info->attrs[IEEE802154_ATTR_BCN_ORD]);
 459         sf_ord = nla_get_u8(info->attrs[IEEE802154_ATTR_SF_ORD]);
 460         pan_coord = nla_get_u8(info->attrs[IEEE802154_ATTR_PAN_COORD]);
 461         blx = nla_get_u8(info->attrs[IEEE802154_ATTR_BAT_EXT]);
 462         coord_realign = nla_get_u8(info->attrs[IEEE802154_ATTR_COORD_REALIGN]);
 463
 464         if (info->attrs[IEEE802154_ATTR_PAGE])
 465                 page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
 466         else
 467                 page = 0;
 468
 469
 470         if (addr.short_addr == IEEE802154_ADDR_BROADCAST) {
 471                 ieee802154_nl_start_confirm(dev, IEEE802154_NO_SHORT_ADDRESS);
 472                 dev_put(dev);
 473                 return -EINVAL;
 474         }
 475
 476         ret = ieee802154_mlme_ops(dev)->start_req(dev, &addr, channel, page,
 477                 bcn_ord, sf_ord, pan_coord, blx, coord_realign);
 478
 479 out:
 480         dev_put(dev);
 481         return ret;
 482 }
 483
 484 int ieee802154_scan_req(struct sk_buff *skb, struct genl_info *info)
 485 {
 486         struct net_device *dev;
 487         int ret = -EOPNOTSUPP;
 488         u8 type;
 489         u32 channels;
 490         u8 duration;
 491         u8 page;
 492
 493         if (!info->attrs[IEEE802154_ATTR_SCAN_TYPE] ||
 494             !info->attrs[IEEE802154_ATTR_CHANNELS] ||
 495             !info->attrs[IEEE802154_ATTR_DURATION])
 496                 return -EINVAL;
 497
 498         dev = ieee802154_nl_get_dev(info);
 499         if (!dev)
 500                 return -ENODEV;
 501         if (!ieee802154_mlme_ops(dev)->scan_req)
 502                 goto out;
 503
 504         type = nla_get_u8(info->attrs[IEEE802154_ATTR_SCAN_TYPE]);
 505         channels = nla_get_u32(info->attrs[IEEE802154_ATTR_CHANNELS]);
 506         duration = nla_get_u8(info->attrs[IEEE802154_ATTR_DURATION]);
 507
 508         if (info->attrs[IEEE802154_ATTR_PAGE])
 509                 page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
 510         else
 511                 page = 0;
 512
 513
 514         ret = ieee802154_mlme_ops(dev)->scan_req(dev, type, channels, page,
 515                         duration);
 516
 517 out:
 518         dev_put(dev);
 519         return ret;
 520 }
 521
 522 int ieee802154_list_iface(struct sk_buff *skb, struct genl_info *info)
 523 {
 524         /* Request for interface name, index, type, IEEE address,
 525            PAN Id, short address */
 526         struct sk_buff *msg;
 527         struct net_device *dev = NULL;
 528         int rc = -ENOBUFS;
 529
 530         pr_debug("%s\n", __func__);
 531
 532         dev = ieee802154_nl_get_dev(info);
 533         if (!dev)
 534                 return -ENODEV;
 535
 536         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 537         if (!msg)
 538                 goto out_dev;
 539
 540         rc = ieee802154_nl_fill_iface(msg, info->snd_portid, info->snd_seq,
 541                         0, dev);
 542         if (rc < 0)
 543                 goto out_free;
 544
 545         dev_put(dev);
 546
 547         return genlmsg_reply(msg, info);
 548 out_free:
 549         nlmsg_free(msg);
 550 out_dev:
 551         dev_put(dev);
 552         return rc;
 553
 554 }
 555
 556 int ieee802154_dump_iface(struct sk_buff *skb, struct netlink_callback *cb)
 557 {
 558         struct net *net = sock_net(skb->sk);
 559         struct net_device *dev;
 560         int idx;
 561         int s_idx = cb->args[0];
 562
 563         pr_debug("%s\n", __func__);
 564
 565         idx = 0;
 566         for_each_netdev(net, dev) {
 567                 if (idx < s_idx || (dev->type != ARPHRD_IEEE802154))
 568                         goto cont;
 569
 570                 if (ieee802154_nl_fill_iface(skb, NETLINK_CB(cb->skb).portid,
 571                         cb->nlh->nlmsg_seq, NLM_F_MULTI, dev) < 0)
 572                         break;
 573 cont:
 574                 idx++;
 575         }
 576         cb->args[0] = idx;
 577
 578         return skb->len;
 579 }