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 static struct genl_multicast_group ieee802154_coord_mcgrp = {
  43         .name           = IEEE802154_MCAST_COORD_NAME,
  44 };
  45
  46 static struct genl_multicast_group ieee802154_beacon_mcgrp = {
  47         .name           = IEEE802154_MCAST_BEACON_NAME,
  48 };
  49
  50 int ieee802154_nl_assoc_indic(struct net_device *dev,
  51                 struct ieee802154_addr *addr, u8 cap)
  52 {
  53         struct sk_buff *msg;
  54
  55         pr_debug("%s\n", __func__);
  56
  57         if (addr->addr_type != IEEE802154_ADDR_LONG) {
  58                 pr_err("%s: received non-long source address!\n", __func__);
  59                 return -EINVAL;
  60         }
  61
  62         msg = ieee802154_nl_create(0, IEEE802154_ASSOCIATE_INDIC);
  63         if (!msg)
  64                 return -ENOBUFS;
  65
  66         if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
  67             nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
  68             nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
  69                     dev->dev_addr) ||
  70             nla_put(msg, IEEE802154_ATTR_SRC_HW_ADDR, IEEE802154_ADDR_LEN,
  71                     addr->hwaddr) ||
  72             nla_put_u8(msg, IEEE802154_ATTR_CAPABILITY, cap))
  73                 goto nla_put_failure;
  74
  75         return ieee802154_nl_mcast(msg, ieee802154_coord_mcgrp.id);
  76
  77 nla_put_failure:
  78         nlmsg_free(msg);
  79         return -ENOBUFS;
  80 }
  81 EXPORT_SYMBOL(ieee802154_nl_assoc_indic);
  82
  83 int ieee802154_nl_assoc_confirm(struct net_device *dev, u16 short_addr,
  84                 u8 status)
  85 {
  86         struct sk_buff *msg;
  87
  88         pr_debug("%s\n", __func__);
  89
  90         msg = ieee802154_nl_create(0, IEEE802154_ASSOCIATE_CONF);
  91         if (!msg)
  92                 return -ENOBUFS;
  93
  94         if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
  95             nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
  96             nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
  97                     dev->dev_addr) ||
  98             nla_put_u16(msg, IEEE802154_ATTR_SHORT_ADDR, short_addr) ||
  99             nla_put_u8(msg, IEEE802154_ATTR_STATUS, status))
 100                 goto nla_put_failure;
 101         return ieee802154_nl_mcast(msg, ieee802154_coord_mcgrp.id);
 102
 103 nla_put_failure:
 104         nlmsg_free(msg);
 105         return -ENOBUFS;
 106 }
 107 EXPORT_SYMBOL(ieee802154_nl_assoc_confirm);
 108
 109 int ieee802154_nl_disassoc_indic(struct net_device *dev,
 110                 struct ieee802154_addr *addr, u8 reason)
 111 {
 112         struct sk_buff *msg;
 113
 114         pr_debug("%s\n", __func__);
 115
 116         msg = ieee802154_nl_create(0, IEEE802154_DISASSOCIATE_INDIC);
 117         if (!msg)
 118                 return -ENOBUFS;
 119
 120         if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
 121             nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
 122             nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 123                     dev->dev_addr))
 124                 goto nla_put_failure;
 125         if (addr->addr_type == IEEE802154_ADDR_LONG) {
 126                 if (nla_put(msg, IEEE802154_ATTR_SRC_HW_ADDR, IEEE802154_ADDR_LEN,
 127                             addr->hwaddr))
 128                         goto nla_put_failure;
 129         } else {
 130                 if (nla_put_u16(msg, IEEE802154_ATTR_SRC_SHORT_ADDR,
 131                                 addr->short_addr))
 132                         goto nla_put_failure;
 133         }
 134         if (nla_put_u8(msg, IEEE802154_ATTR_REASON, reason))
 135                 goto nla_put_failure;
 136         return ieee802154_nl_mcast(msg, ieee802154_coord_mcgrp.id);
 137
 138 nla_put_failure:
 139         nlmsg_free(msg);
 140         return -ENOBUFS;
 141 }
 142 EXPORT_SYMBOL(ieee802154_nl_disassoc_indic);
 143
 144 int ieee802154_nl_disassoc_confirm(struct net_device *dev, u8 status)
 145 {
 146         struct sk_buff *msg;
 147
 148         pr_debug("%s\n", __func__);
 149
 150         msg = ieee802154_nl_create(0, IEEE802154_DISASSOCIATE_CONF);
 151         if (!msg)
 152                 return -ENOBUFS;
 153
 154         if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
 155             nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
 156             nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 157                     dev->dev_addr) ||
 158             nla_put_u8(msg, IEEE802154_ATTR_STATUS, status))
 159                 goto nla_put_failure;
 160         return ieee802154_nl_mcast(msg, ieee802154_coord_mcgrp.id);
 161
 162 nla_put_failure:
 163         nlmsg_free(msg);
 164         return -ENOBUFS;
 165 }
 166 EXPORT_SYMBOL(ieee802154_nl_disassoc_confirm);
 167
 168 int ieee802154_nl_beacon_indic(struct net_device *dev,
 169                 u16 panid, u16 coord_addr)
 170 {
 171         struct sk_buff *msg;
 172
 173         pr_debug("%s\n", __func__);
 174
 175         msg = ieee802154_nl_create(0, IEEE802154_BEACON_NOTIFY_INDIC);
 176         if (!msg)
 177                 return -ENOBUFS;
 178
 179         if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
 180             nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
 181             nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 182                     dev->dev_addr) ||
 183             nla_put_u16(msg, IEEE802154_ATTR_COORD_SHORT_ADDR, coord_addr) ||
 184             nla_put_u16(msg, IEEE802154_ATTR_COORD_PAN_ID, panid))
 185                 goto nla_put_failure;
 186         return ieee802154_nl_mcast(msg, ieee802154_coord_mcgrp.id);
 187
 188 nla_put_failure:
 189         nlmsg_free(msg);
 190         return -ENOBUFS;
 191 }
 192 EXPORT_SYMBOL(ieee802154_nl_beacon_indic);
 193
 194 int ieee802154_nl_scan_confirm(struct net_device *dev,
 195                 u8 status, u8 scan_type, u32 unscanned, u8 page,
 196                 u8 *edl/* , struct list_head *pan_desc_list */)
 197 {
 198         struct sk_buff *msg;
 199
 200         pr_debug("%s\n", __func__);
 201
 202         msg = ieee802154_nl_create(0, IEEE802154_SCAN_CONF);
 203         if (!msg)
 204                 return -ENOBUFS;
 205
 206         if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
 207             nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
 208             nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 209                     dev->dev_addr) ||
 210             nla_put_u8(msg, IEEE802154_ATTR_STATUS, status) ||
 211             nla_put_u8(msg, IEEE802154_ATTR_SCAN_TYPE, scan_type) ||
 212             nla_put_u32(msg, IEEE802154_ATTR_CHANNELS, unscanned) ||
 213             nla_put_u8(msg, IEEE802154_ATTR_PAGE, page) ||
 214             (edl &&
 215              nla_put(msg, IEEE802154_ATTR_ED_LIST, 27, edl)))
 216                 goto nla_put_failure;
 217         return ieee802154_nl_mcast(msg, ieee802154_coord_mcgrp.id);
 218
 219 nla_put_failure:
 220         nlmsg_free(msg);
 221         return -ENOBUFS;
 222 }
 223 EXPORT_SYMBOL(ieee802154_nl_scan_confirm);
 224
 225 int ieee802154_nl_start_confirm(struct net_device *dev, u8 status)
 226 {
 227         struct sk_buff *msg;
 228
 229         pr_debug("%s\n", __func__);
 230
 231         msg = ieee802154_nl_create(0, IEEE802154_START_CONF);
 232         if (!msg)
 233                 return -ENOBUFS;
 234
 235         if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
 236             nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
 237             nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 238                     dev->dev_addr) ||
 239             nla_put_u8(msg, IEEE802154_ATTR_STATUS, status))
 240                 goto nla_put_failure;
 241         return ieee802154_nl_mcast(msg, ieee802154_coord_mcgrp.id);
 242
 243 nla_put_failure:
 244         nlmsg_free(msg);
 245         return -ENOBUFS;
 246 }
 247 EXPORT_SYMBOL(ieee802154_nl_start_confirm);
 248
 249 static int ieee802154_nl_fill_iface(struct sk_buff *msg, u32 portid,
 250         u32 seq, int flags, struct net_device *dev)
 251 {
 252         void *hdr;
 253         struct wpan_phy *phy;
 254
 255         pr_debug("%s\n", __func__);
 256
 257         hdr = genlmsg_put(msg, 0, seq, &nl802154_family, flags,
 258                 IEEE802154_LIST_IFACE);
 259         if (!hdr)
 260                 goto out;
 261
 262         phy = ieee802154_mlme_ops(dev)->get_phy(dev);
 263         BUG_ON(!phy);
 264
 265         if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
 266             nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) ||
 267             nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
 268             nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 269                     dev->dev_addr) ||
 270             nla_put_u16(msg, IEEE802154_ATTR_SHORT_ADDR,
 271                         ieee802154_mlme_ops(dev)->get_short_addr(dev)) ||
 272             nla_put_u16(msg, IEEE802154_ATTR_PAN_ID,
 273                         ieee802154_mlme_ops(dev)->get_pan_id(dev)))
 274                 goto nla_put_failure;
 275         wpan_phy_put(phy);
 276         return genlmsg_end(msg, hdr);
 277
 278 nla_put_failure:
 279         wpan_phy_put(phy);
 280         genlmsg_cancel(msg, hdr);
 281 out:
 282         return -EMSGSIZE;
 283 }
 284
 285 /* Requests from userspace */
 286 static struct net_device *ieee802154_nl_get_dev(struct genl_info *info)
 287 {
 288         struct net_device *dev;
 289
 290         if (info->attrs[IEEE802154_ATTR_DEV_NAME]) {
 291                 char name[IFNAMSIZ + 1];
 292                 nla_strlcpy(name, info->attrs[IEEE802154_ATTR_DEV_NAME],
 293                                 sizeof(name));
 294                 dev = dev_get_by_name(&init_net, name);
 295         } else if (info->attrs[IEEE802154_ATTR_DEV_INDEX])
 296                 dev = dev_get_by_index(&init_net,
 297                         nla_get_u32(info->attrs[IEEE802154_ATTR_DEV_INDEX]));
 298         else
 299                 return NULL;
 300
 301         if (!dev)
 302                 return NULL;
 303
 304         if (dev->type != ARPHRD_IEEE802154) {
 305                 dev_put(dev);
 306                 return NULL;
 307         }
 308
 309         return dev;
 310 }
 311
 312 static int ieee802154_associate_req(struct sk_buff *skb,
 313                 struct genl_info *info)
 314 {
 315         struct net_device *dev;
 316         struct ieee802154_addr addr;
 317         u8 page;
 318         int ret = -EINVAL;
 319
 320         if (!info->attrs[IEEE802154_ATTR_CHANNEL] ||
 321             !info->attrs[IEEE802154_ATTR_COORD_PAN_ID] ||
 322             (!info->attrs[IEEE802154_ATTR_COORD_HW_ADDR] &&
 323                 !info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]) ||
 324             !info->attrs[IEEE802154_ATTR_CAPABILITY])
 325                 return -EINVAL;
 326
 327         dev = ieee802154_nl_get_dev(info);
 328         if (!dev)
 329                 return -ENODEV;
 330
 331         if (info->attrs[IEEE802154_ATTR_COORD_HW_ADDR]) {
 332                 addr.addr_type = IEEE802154_ADDR_LONG;
 333                 nla_memcpy(addr.hwaddr,
 334                                 info->attrs[IEEE802154_ATTR_COORD_HW_ADDR],
 335                                 IEEE802154_ADDR_LEN);
 336         } else {
 337                 addr.addr_type = IEEE802154_ADDR_SHORT;
 338                 addr.short_addr = nla_get_u16(
 339                                 info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]);
 340         }
 341         addr.pan_id = nla_get_u16(info->attrs[IEEE802154_ATTR_COORD_PAN_ID]);
 342
 343         if (info->attrs[IEEE802154_ATTR_PAGE])
 344                 page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
 345         else
 346                 page = 0;
 347
 348         ret = ieee802154_mlme_ops(dev)->assoc_req(dev, &addr,
 349                         nla_get_u8(info->attrs[IEEE802154_ATTR_CHANNEL]),
 350                         page,
 351                         nla_get_u8(info->attrs[IEEE802154_ATTR_CAPABILITY]));
 352
 353         dev_put(dev);
 354         return ret;
 355 }
 356
 357 static int ieee802154_associate_resp(struct sk_buff *skb,
 358                 struct genl_info *info)
 359 {
 360         struct net_device *dev;
 361         struct ieee802154_addr addr;
 362         int ret = -EINVAL;
 363
 364         if (!info->attrs[IEEE802154_ATTR_STATUS] ||
 365             !info->attrs[IEEE802154_ATTR_DEST_HW_ADDR] ||
 366             !info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR])
 367                 return -EINVAL;
 368
 369         dev = ieee802154_nl_get_dev(info);
 370         if (!dev)
 371                 return -ENODEV;
 372
 373         addr.addr_type = IEEE802154_ADDR_LONG;
 374         nla_memcpy(addr.hwaddr, info->attrs[IEEE802154_ATTR_DEST_HW_ADDR],
 375                         IEEE802154_ADDR_LEN);
 376         addr.pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
 377
 378
 379         ret = ieee802154_mlme_ops(dev)->assoc_resp(dev, &addr,
 380                 nla_get_u16(info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]),
 381                 nla_get_u8(info->attrs[IEEE802154_ATTR_STATUS]));
 382
 383         dev_put(dev);
 384         return ret;
 385 }
 386
 387 static int ieee802154_disassociate_req(struct sk_buff *skb,
 388                 struct genl_info *info)
 389 {
 390         struct net_device *dev;
 391         struct ieee802154_addr addr;
 392         int ret = -EINVAL;
 393
 394         if ((!info->attrs[IEEE802154_ATTR_DEST_HW_ADDR] &&
 395                 !info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]) ||
 396             !info->attrs[IEEE802154_ATTR_REASON])
 397                 return -EINVAL;
 398
 399         dev = ieee802154_nl_get_dev(info);
 400         if (!dev)
 401                 return -ENODEV;
 402
 403         if (info->attrs[IEEE802154_ATTR_DEST_HW_ADDR]) {
 404                 addr.addr_type = IEEE802154_ADDR_LONG;
 405                 nla_memcpy(addr.hwaddr,
 406                                 info->attrs[IEEE802154_ATTR_DEST_HW_ADDR],
 407                                 IEEE802154_ADDR_LEN);
 408         } else {
 409                 addr.addr_type = IEEE802154_ADDR_SHORT;
 410                 addr.short_addr = nla_get_u16(
 411                                 info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]);
 412         }
 413         addr.pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
 414
 415         ret = ieee802154_mlme_ops(dev)->disassoc_req(dev, &addr,
 416                         nla_get_u8(info->attrs[IEEE802154_ATTR_REASON]));
 417
 418         dev_put(dev);
 419         return ret;
 420 }
 421
 422 /*
 423  * PANid, channel, beacon_order = 15, superframe_order = 15,
 424  * PAN_coordinator, battery_life_extension = 0,
 425  * coord_realignment = 0, security_enable = 0
 426 */
 427 static int ieee802154_start_req(struct sk_buff *skb, struct genl_info *info)
 428 {
 429         struct net_device *dev;
 430         struct ieee802154_addr addr;
 431
 432         u8 channel, bcn_ord, sf_ord;
 433         u8 page;
 434         int pan_coord, blx, coord_realign;
 435         int ret;
 436
 437         if (!info->attrs[IEEE802154_ATTR_COORD_PAN_ID] ||
 438             !info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR] ||
 439             !info->attrs[IEEE802154_ATTR_CHANNEL] ||
 440             !info->attrs[IEEE802154_ATTR_BCN_ORD] ||
 441             !info->attrs[IEEE802154_ATTR_SF_ORD] ||
 442             !info->attrs[IEEE802154_ATTR_PAN_COORD] ||
 443             !info->attrs[IEEE802154_ATTR_BAT_EXT] ||
 444             !info->attrs[IEEE802154_ATTR_COORD_REALIGN]
 445          )
 446                 return -EINVAL;
 447
 448         dev = ieee802154_nl_get_dev(info);
 449         if (!dev)
 450                 return -ENODEV;
 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         dev_put(dev);
 480         return ret;
 481 }
 482
 483 static int ieee802154_scan_req(struct sk_buff *skb, struct genl_info *info)
 484 {
 485         struct net_device *dev;
 486         int ret;
 487         u8 type;
 488         u32 channels;
 489         u8 duration;
 490         u8 page;
 491
 492         if (!info->attrs[IEEE802154_ATTR_SCAN_TYPE] ||
 493             !info->attrs[IEEE802154_ATTR_CHANNELS] ||
 494             !info->attrs[IEEE802154_ATTR_DURATION])
 495                 return -EINVAL;
 496
 497         dev = ieee802154_nl_get_dev(info);
 498         if (!dev)
 499                 return -ENODEV;
 500
 501         type = nla_get_u8(info->attrs[IEEE802154_ATTR_SCAN_TYPE]);
 502         channels = nla_get_u32(info->attrs[IEEE802154_ATTR_CHANNELS]);
 503         duration = nla_get_u8(info->attrs[IEEE802154_ATTR_DURATION]);
 504
 505         if (info->attrs[IEEE802154_ATTR_PAGE])
 506                 page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
 507         else
 508                 page = 0;
 509
 510
 511         ret = ieee802154_mlme_ops(dev)->scan_req(dev, type, channels, page,
 512                         duration);
 513
 514         dev_put(dev);
 515         return ret;
 516 }
 517
 518 static int ieee802154_list_iface(struct sk_buff *skb,
 519         struct genl_info *info)
 520 {
 521         /* Request for interface name, index, type, IEEE address,
 522            PAN Id, short address */
 523         struct sk_buff *msg;
 524         struct net_device *dev = NULL;
 525         int rc = -ENOBUFS;
 526
 527         pr_debug("%s\n", __func__);
 528
 529         dev = ieee802154_nl_get_dev(info);
 530         if (!dev)
 531                 return -ENODEV;
 532
 533         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 534         if (!msg)
 535                 goto out_dev;
 536
 537         rc = ieee802154_nl_fill_iface(msg, info->snd_portid, info->snd_seq,
 538                         0, dev);
 539         if (rc < 0)
 540                 goto out_free;
 541
 542         dev_put(dev);
 543
 544         return genlmsg_reply(msg, info);
 545 out_free:
 546         nlmsg_free(msg);
 547 out_dev:
 548         dev_put(dev);
 549         return rc;
 550
 551 }
 552
 553 static int ieee802154_dump_iface(struct sk_buff *skb,
 554         struct netlink_callback *cb)
 555 {
 556         struct net *net = sock_net(skb->sk);
 557         struct net_device *dev;
 558         int idx;
 559         int s_idx = cb->args[0];
 560
 561         pr_debug("%s\n", __func__);
 562
 563         idx = 0;
 564         for_each_netdev(net, dev) {
 565                 if (idx < s_idx || (dev->type != ARPHRD_IEEE802154))
 566                         goto cont;
 567
 568                 if (ieee802154_nl_fill_iface(skb, NETLINK_CB(cb->skb).portid,
 569                         cb->nlh->nlmsg_seq, NLM_F_MULTI, dev) < 0)
 570                         break;
 571 cont:
 572                 idx++;
 573         }
 574         cb->args[0] = idx;
 575
 576         return skb->len;
 577 }
 578
 579 static struct genl_ops ieee802154_coordinator_ops[] = {
 580         IEEE802154_OP(IEEE802154_ASSOCIATE_REQ, ieee802154_associate_req),
 581         IEEE802154_OP(IEEE802154_ASSOCIATE_RESP, ieee802154_associate_resp),
 582         IEEE802154_OP(IEEE802154_DISASSOCIATE_REQ, ieee802154_disassociate_req),
 583         IEEE802154_OP(IEEE802154_SCAN_REQ, ieee802154_scan_req),
 584         IEEE802154_OP(IEEE802154_START_REQ, ieee802154_start_req),
 585         IEEE802154_DUMP(IEEE802154_LIST_IFACE, ieee802154_list_iface,
 586                                                         ieee802154_dump_iface),
 587 };
 588
 589 /*
 590  * No need to unregister as family unregistration will do it.
 591  */
 592 int nl802154_mac_register(void)
 593 {
 594         int i;
 595         int rc;
 596
 597         rc = genl_register_mc_group(&nl802154_family,
 598                         &ieee802154_coord_mcgrp);
 599         if (rc)
 600                 return rc;
 601
 602         rc = genl_register_mc_group(&nl802154_family,
 603                         &ieee802154_beacon_mcgrp);
 604         if (rc)
 605                 return rc;
 606
 607         for (i = 0; i < ARRAY_SIZE(ieee802154_coordinator_ops); i++) {
 608                 rc = genl_register_ops(&nl802154_family,
 609                                 &ieee802154_coordinator_ops[i]);
 610                 if (rc)
 611                         return rc;
 612         }
 613
 614         return 0;
 615 }