net/ieee802154/netlink.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/kernel.h>
  26 #include <linux/if_arp.h>
  27 #include <linux/netdevice.h>
  28 #include <net/netlink.h>
  29 #include <net/genetlink.h>
  30 #include <net/sock.h>
  31 #include <linux/nl802154.h>
  32 #include <net/af_ieee802154.h>
  33 #include <net/nl802154.h>
  34 #include <net/ieee802154.h>
  35 #include <net/ieee802154_netdev.h>
  36
  37 static unsigned int ieee802154_seq_num;
  38 static DEFINE_SPINLOCK(ieee802154_seq_lock);
  39
  40 static struct genl_family ieee802154_coordinator_family = {
  41         .id             = GENL_ID_GENERATE,
  42         .hdrsize        = 0,
  43         .name           = IEEE802154_NL_NAME,
  44         .version        = 1,
  45         .maxattr        = IEEE802154_ATTR_MAX,
  46 };
  47
  48 static struct genl_multicast_group ieee802154_coord_mcgrp = {
  49         .name           = IEEE802154_MCAST_COORD_NAME,
  50 };
  51
  52 static struct genl_multicast_group ieee802154_beacon_mcgrp = {
  53         .name           = IEEE802154_MCAST_BEACON_NAME,
  54 };
  55
  56 /* Requests to userspace */
  57 static struct sk_buff *ieee802154_nl_create(int flags, u8 req)
  58 {
  59         void *hdr;
  60         struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
  61         unsigned long f;
  62
  63         if (!msg)
  64                 return NULL;
  65
  66         spin_lock_irqsave(&ieee802154_seq_lock, f);
  67         hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
  68                         &ieee802154_coordinator_family, flags, req);
  69         spin_unlock_irqrestore(&ieee802154_seq_lock, f);
  70         if (!hdr) {
  71                 nlmsg_free(msg);
  72                 return NULL;
  73         }
  74
  75         return msg;
  76 }
  77
  78 static int ieee802154_nl_finish(struct sk_buff *msg)
  79 {
  80         /* XXX: nlh is right at the start of msg */
  81         void *hdr = genlmsg_data(NLMSG_DATA(msg->data));
  82
  83         if (genlmsg_end(msg, hdr) < 0)
  84                 goto out;
  85
  86         return genlmsg_multicast(msg, 0, ieee802154_coord_mcgrp.id,
  87                         GFP_ATOMIC);
  88 out:
  89         nlmsg_free(msg);
  90         return -ENOBUFS;
  91 }
  92
  93 int ieee802154_nl_assoc_indic(struct net_device *dev,
  94                 struct ieee802154_addr *addr, u8 cap)
  95 {
  96         struct sk_buff *msg;
  97
  98         pr_debug("%s\n", __func__);
  99
 100         if (addr->addr_type != IEEE802154_ADDR_LONG) {
 101                 pr_err("%s: received non-long source address!\n", __func__);
 102                 return -EINVAL;
 103         }
 104
 105         msg = ieee802154_nl_create(0, IEEE802154_ASSOCIATE_INDIC);
 106         if (!msg)
 107                 return -ENOBUFS;
 108
 109         NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);
 110         NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);
 111         NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 112                         dev->dev_addr);
 113
 114         NLA_PUT(msg, IEEE802154_ATTR_SRC_HW_ADDR, IEEE802154_ADDR_LEN,
 115                         addr->hwaddr);
 116
 117         NLA_PUT_U8(msg, IEEE802154_ATTR_CAPABILITY, cap);
 118
 119         return ieee802154_nl_finish(msg);
 120
 121 nla_put_failure:
 122         nlmsg_free(msg);
 123         return -ENOBUFS;
 124 }
 125 EXPORT_SYMBOL(ieee802154_nl_assoc_indic);
 126
 127 int ieee802154_nl_assoc_confirm(struct net_device *dev, u16 short_addr,
 128                 u8 status)
 129 {
 130         struct sk_buff *msg;
 131
 132         pr_debug("%s\n", __func__);
 133
 134         msg = ieee802154_nl_create(0, IEEE802154_ASSOCIATE_CONF);
 135         if (!msg)
 136                 return -ENOBUFS;
 137
 138         NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);
 139         NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);
 140         NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 141                         dev->dev_addr);
 142
 143         NLA_PUT_U16(msg, IEEE802154_ATTR_SHORT_ADDR, short_addr);
 144         NLA_PUT_U8(msg, IEEE802154_ATTR_STATUS, status);
 145
 146         return ieee802154_nl_finish(msg);
 147
 148 nla_put_failure:
 149         nlmsg_free(msg);
 150         return -ENOBUFS;
 151 }
 152 EXPORT_SYMBOL(ieee802154_nl_assoc_confirm);
 153
 154 int ieee802154_nl_disassoc_indic(struct net_device *dev,
 155                 struct ieee802154_addr *addr, u8 reason)
 156 {
 157         struct sk_buff *msg;
 158
 159         pr_debug("%s\n", __func__);
 160
 161         msg = ieee802154_nl_create(0, IEEE802154_DISASSOCIATE_INDIC);
 162         if (!msg)
 163                 return -ENOBUFS;
 164
 165         NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);
 166         NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);
 167         NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 168                         dev->dev_addr);
 169
 170         if (addr->addr_type == IEEE802154_ADDR_LONG)
 171                 NLA_PUT(msg, IEEE802154_ATTR_SRC_HW_ADDR, IEEE802154_ADDR_LEN,
 172                                 addr->hwaddr);
 173         else
 174                 NLA_PUT_U16(msg, IEEE802154_ATTR_SRC_SHORT_ADDR,
 175                                 addr->short_addr);
 176
 177         NLA_PUT_U8(msg, IEEE802154_ATTR_REASON, reason);
 178
 179         return ieee802154_nl_finish(msg);
 180
 181 nla_put_failure:
 182         nlmsg_free(msg);
 183         return -ENOBUFS;
 184 }
 185 EXPORT_SYMBOL(ieee802154_nl_disassoc_indic);
 186
 187 int ieee802154_nl_disassoc_confirm(struct net_device *dev, u8 status)
 188 {
 189         struct sk_buff *msg;
 190
 191         pr_debug("%s\n", __func__);
 192
 193         msg = ieee802154_nl_create(0, IEEE802154_DISASSOCIATE_CONF);
 194         if (!msg)
 195                 return -ENOBUFS;
 196
 197         NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);
 198         NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);
 199         NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 200                         dev->dev_addr);
 201
 202         NLA_PUT_U8(msg, IEEE802154_ATTR_STATUS, status);
 203
 204         return ieee802154_nl_finish(msg);
 205
 206 nla_put_failure:
 207         nlmsg_free(msg);
 208         return -ENOBUFS;
 209 }
 210 EXPORT_SYMBOL(ieee802154_nl_disassoc_confirm);
 211
 212 int ieee802154_nl_beacon_indic(struct net_device *dev,
 213                 u16 panid, u16 coord_addr)
 214 {
 215         struct sk_buff *msg;
 216
 217         pr_debug("%s\n", __func__);
 218
 219         msg = ieee802154_nl_create(0, IEEE802154_BEACON_NOTIFY_INDIC);
 220         if (!msg)
 221                 return -ENOBUFS;
 222
 223         NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);
 224         NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);
 225         NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 226                         dev->dev_addr);
 227         NLA_PUT_U16(msg, IEEE802154_ATTR_COORD_SHORT_ADDR, coord_addr);
 228         NLA_PUT_U16(msg, IEEE802154_ATTR_COORD_PAN_ID, panid);
 229
 230         return ieee802154_nl_finish(msg);
 231
 232 nla_put_failure:
 233         nlmsg_free(msg);
 234         return -ENOBUFS;
 235 }
 236 EXPORT_SYMBOL(ieee802154_nl_beacon_indic);
 237
 238 int ieee802154_nl_scan_confirm(struct net_device *dev,
 239                 u8 status, u8 scan_type, u32 unscanned, u8 page,
 240                 u8 *edl/* , struct list_head *pan_desc_list */)
 241 {
 242         struct sk_buff *msg;
 243
 244         pr_debug("%s\n", __func__);
 245
 246         msg = ieee802154_nl_create(0, IEEE802154_SCAN_CONF);
 247         if (!msg)
 248                 return -ENOBUFS;
 249
 250         NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);
 251         NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);
 252         NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 253                         dev->dev_addr);
 254
 255         NLA_PUT_U8(msg, IEEE802154_ATTR_STATUS, status);
 256         NLA_PUT_U8(msg, IEEE802154_ATTR_SCAN_TYPE, scan_type);
 257         NLA_PUT_U32(msg, IEEE802154_ATTR_CHANNELS, unscanned);
 258         NLA_PUT_U8(msg, IEEE802154_ATTR_PAGE, page);
 259
 260         if (edl)
 261                 NLA_PUT(msg, IEEE802154_ATTR_ED_LIST, 27, edl);
 262
 263         return ieee802154_nl_finish(msg);
 264
 265 nla_put_failure:
 266         nlmsg_free(msg);
 267         return -ENOBUFS;
 268 }
 269 EXPORT_SYMBOL(ieee802154_nl_scan_confirm);
 270
 271 int ieee802154_nl_start_confirm(struct net_device *dev, u8 status)
 272 {
 273         struct sk_buff *msg;
 274
 275         pr_debug("%s\n", __func__);
 276
 277         msg = ieee802154_nl_create(0, IEEE802154_START_CONF);
 278         if (!msg)
 279                 return -ENOBUFS;
 280
 281         NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);
 282         NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);
 283         NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 284                         dev->dev_addr);
 285
 286         NLA_PUT_U8(msg, IEEE802154_ATTR_STATUS, status);
 287
 288         return ieee802154_nl_finish(msg);
 289
 290 nla_put_failure:
 291         nlmsg_free(msg);
 292         return -ENOBUFS;
 293 }
 294 EXPORT_SYMBOL(ieee802154_nl_start_confirm);
 295
 296 static int ieee802154_nl_fill_iface(struct sk_buff *msg, u32 pid,
 297         u32 seq, int flags, struct net_device *dev)
 298 {
 299         void *hdr;
 300
 301         pr_debug("%s\n", __func__);
 302
 303         hdr = genlmsg_put(msg, 0, seq, &ieee802154_coordinator_family, flags,
 304                 IEEE802154_LIST_IFACE);
 305         if (!hdr)
 306                 goto out;
 307
 308         NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);
 309         NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);
 310
 311         NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 312                 dev->dev_addr);
 313         NLA_PUT_U16(msg, IEEE802154_ATTR_SHORT_ADDR,
 314                 ieee802154_mlme_ops(dev)->get_short_addr(dev));
 315         NLA_PUT_U16(msg, IEEE802154_ATTR_PAN_ID,
 316                 ieee802154_mlme_ops(dev)->get_pan_id(dev));
 317         return genlmsg_end(msg, hdr);
 318
 319 nla_put_failure:
 320         genlmsg_cancel(msg, hdr);
 321 out:
 322         return -EMSGSIZE;
 323 }
 324
 325 /* Requests from userspace */
 326 static struct net_device *ieee802154_nl_get_dev(struct genl_info *info)
 327 {
 328         struct net_device *dev;
 329
 330         if (info->attrs[IEEE802154_ATTR_DEV_NAME]) {
 331                 char name[IFNAMSIZ + 1];
 332                 nla_strlcpy(name, info->attrs[IEEE802154_ATTR_DEV_NAME],
 333                                 sizeof(name));
 334                 dev = dev_get_by_name(&init_net, name);
 335         } else if (info->attrs[IEEE802154_ATTR_DEV_INDEX])
 336                 dev = dev_get_by_index(&init_net,
 337                         nla_get_u32(info->attrs[IEEE802154_ATTR_DEV_INDEX]));
 338         else
 339                 return NULL;
 340
 341         if (!dev)
 342                 return NULL;
 343
 344         if (dev->type != ARPHRD_IEEE802154) {
 345                 dev_put(dev);
 346                 return NULL;
 347         }
 348
 349         return dev;
 350 }
 351
 352 static int ieee802154_associate_req(struct sk_buff *skb,
 353                 struct genl_info *info)
 354 {
 355         struct net_device *dev;
 356         struct ieee802154_addr addr;
 357         u8 page;
 358         int ret = -EINVAL;
 359
 360         if (!info->attrs[IEEE802154_ATTR_CHANNEL] ||
 361             !info->attrs[IEEE802154_ATTR_COORD_PAN_ID] ||
 362             (!info->attrs[IEEE802154_ATTR_COORD_HW_ADDR] &&
 363                 !info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]) ||
 364             !info->attrs[IEEE802154_ATTR_CAPABILITY])
 365                 return -EINVAL;
 366
 367         dev = ieee802154_nl_get_dev(info);
 368         if (!dev)
 369                 return -ENODEV;
 370
 371         if (info->attrs[IEEE802154_ATTR_COORD_HW_ADDR]) {
 372                 addr.addr_type = IEEE802154_ADDR_LONG;
 373                 nla_memcpy(addr.hwaddr,
 374                                 info->attrs[IEEE802154_ATTR_COORD_HW_ADDR],
 375                                 IEEE802154_ADDR_LEN);
 376         } else {
 377                 addr.addr_type = IEEE802154_ADDR_SHORT;
 378                 addr.short_addr = nla_get_u16(
 379                                 info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]);
 380         }
 381         addr.pan_id = nla_get_u16(info->attrs[IEEE802154_ATTR_COORD_PAN_ID]);
 382
 383         if (info->attrs[IEEE802154_ATTR_PAGE])
 384                 page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
 385         else
 386                 page = 0;
 387
 388         ret = ieee802154_mlme_ops(dev)->assoc_req(dev, &addr,
 389                         nla_get_u8(info->attrs[IEEE802154_ATTR_CHANNEL]),
 390                         page,
 391                         nla_get_u8(info->attrs[IEEE802154_ATTR_CAPABILITY]));
 392
 393         dev_put(dev);
 394         return ret;
 395 }
 396
 397 static int ieee802154_associate_resp(struct sk_buff *skb,
 398                 struct genl_info *info)
 399 {
 400         struct net_device *dev;
 401         struct ieee802154_addr addr;
 402         int ret = -EINVAL;
 403
 404         if (!info->attrs[IEEE802154_ATTR_STATUS] ||
 405             !info->attrs[IEEE802154_ATTR_DEST_HW_ADDR] ||
 406             !info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR])
 407                 return -EINVAL;
 408
 409         dev = ieee802154_nl_get_dev(info);
 410         if (!dev)
 411                 return -ENODEV;
 412
 413         addr.addr_type = IEEE802154_ADDR_LONG;
 414         nla_memcpy(addr.hwaddr, info->attrs[IEEE802154_ATTR_DEST_HW_ADDR],
 415                         IEEE802154_ADDR_LEN);
 416         addr.pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
 417
 418
 419         ret = ieee802154_mlme_ops(dev)->assoc_resp(dev, &addr,
 420                 nla_get_u16(info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]),
 421                 nla_get_u8(info->attrs[IEEE802154_ATTR_STATUS]));
 422
 423         dev_put(dev);
 424         return ret;
 425 }
 426
 427 static int ieee802154_disassociate_req(struct sk_buff *skb,
 428                 struct genl_info *info)
 429 {
 430         struct net_device *dev;
 431         struct ieee802154_addr addr;
 432         int ret = -EINVAL;
 433
 434         if ((!info->attrs[IEEE802154_ATTR_DEST_HW_ADDR] &&
 435                 !info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]) ||
 436             !info->attrs[IEEE802154_ATTR_REASON])
 437                 return -EINVAL;
 438
 439         dev = ieee802154_nl_get_dev(info);
 440         if (!dev)
 441                 return -ENODEV;
 442
 443         if (info->attrs[IEEE802154_ATTR_DEST_HW_ADDR]) {
 444                 addr.addr_type = IEEE802154_ADDR_LONG;
 445                 nla_memcpy(addr.hwaddr,
 446                                 info->attrs[IEEE802154_ATTR_DEST_HW_ADDR],
 447                                 IEEE802154_ADDR_LEN);
 448         } else {
 449                 addr.addr_type = IEEE802154_ADDR_SHORT;
 450                 addr.short_addr = nla_get_u16(
 451                                 info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]);
 452         }
 453         addr.pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
 454
 455         ret = ieee802154_mlme_ops(dev)->disassoc_req(dev, &addr,
 456                         nla_get_u8(info->attrs[IEEE802154_ATTR_REASON]));
 457
 458         dev_put(dev);
 459         return ret;
 460 }
 461
 462 /*
 463  * PANid, channel, beacon_order = 15, superframe_order = 15,
 464  * PAN_coordinator, battery_life_extension = 0,
 465  * coord_realignment = 0, security_enable = 0
 466 */
 467 static int ieee802154_start_req(struct sk_buff *skb, struct genl_info *info)
 468 {
 469         struct net_device *dev;
 470         struct ieee802154_addr addr;
 471
 472         u8 channel, bcn_ord, sf_ord;
 473         u8 page;
 474         int pan_coord, blx, coord_realign;
 475         int ret;
 476
 477         if (!info->attrs[IEEE802154_ATTR_COORD_PAN_ID] ||
 478             !info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR] ||
 479             !info->attrs[IEEE802154_ATTR_CHANNEL] ||
 480             !info->attrs[IEEE802154_ATTR_BCN_ORD] ||
 481             !info->attrs[IEEE802154_ATTR_SF_ORD] ||
 482             !info->attrs[IEEE802154_ATTR_PAN_COORD] ||
 483             !info->attrs[IEEE802154_ATTR_BAT_EXT] ||
 484             !info->attrs[IEEE802154_ATTR_COORD_REALIGN]
 485          )
 486                 return -EINVAL;
 487
 488         dev = ieee802154_nl_get_dev(info);
 489         if (!dev)
 490                 return -ENODEV;
 491
 492         addr.addr_type = IEEE802154_ADDR_SHORT;
 493         addr.short_addr = nla_get_u16(
 494                         info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]);
 495         addr.pan_id = nla_get_u16(info->attrs[IEEE802154_ATTR_COORD_PAN_ID]);
 496
 497         channel = nla_get_u8(info->attrs[IEEE802154_ATTR_CHANNEL]);
 498         bcn_ord = nla_get_u8(info->attrs[IEEE802154_ATTR_BCN_ORD]);
 499         sf_ord = nla_get_u8(info->attrs[IEEE802154_ATTR_SF_ORD]);
 500         pan_coord = nla_get_u8(info->attrs[IEEE802154_ATTR_PAN_COORD]);
 501         blx = nla_get_u8(info->attrs[IEEE802154_ATTR_BAT_EXT]);
 502         coord_realign = nla_get_u8(info->attrs[IEEE802154_ATTR_COORD_REALIGN]);
 503
 504         if (info->attrs[IEEE802154_ATTR_PAGE])
 505                 page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
 506         else
 507                 page = 0;
 508
 509
 510         if (addr.short_addr == IEEE802154_ADDR_BROADCAST) {
 511                 ieee802154_nl_start_confirm(dev, IEEE802154_NO_SHORT_ADDRESS);
 512                 dev_put(dev);
 513                 return -EINVAL;
 514         }
 515
 516         ret = ieee802154_mlme_ops(dev)->start_req(dev, &addr, channel, page,
 517                 bcn_ord, sf_ord, pan_coord, blx, coord_realign);
 518
 519         dev_put(dev);
 520         return ret;
 521 }
 522
 523 static int ieee802154_scan_req(struct sk_buff *skb, struct genl_info *info)
 524 {
 525         struct net_device *dev;
 526         int ret;
 527         u8 type;
 528         u32 channels;
 529         u8 duration;
 530         u8 page;
 531
 532         if (!info->attrs[IEEE802154_ATTR_SCAN_TYPE] ||
 533             !info->attrs[IEEE802154_ATTR_CHANNELS] ||
 534             !info->attrs[IEEE802154_ATTR_DURATION])
 535                 return -EINVAL;
 536
 537         dev = ieee802154_nl_get_dev(info);
 538         if (!dev)
 539                 return -ENODEV;
 540
 541         type = nla_get_u8(info->attrs[IEEE802154_ATTR_SCAN_TYPE]);
 542         channels = nla_get_u32(info->attrs[IEEE802154_ATTR_CHANNELS]);
 543         duration = nla_get_u8(info->attrs[IEEE802154_ATTR_DURATION]);
 544
 545         if (info->attrs[IEEE802154_ATTR_PAGE])
 546                 page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
 547         else
 548                 page = 0;
 549
 550
 551         ret = ieee802154_mlme_ops(dev)->scan_req(dev, type, channels, page,
 552                         duration);
 553
 554         dev_put(dev);
 555         return ret;
 556 }
 557
 558 static int ieee802154_list_iface(struct sk_buff *skb,
 559         struct genl_info *info)
 560 {
 561         /* Request for interface name, index, type, IEEE address,
 562            PAN Id, short address */
 563         struct sk_buff *msg;
 564         struct net_device *dev = NULL;
 565         int rc = -ENOBUFS;
 566
 567         pr_debug("%s\n", __func__);
 568
 569         dev = ieee802154_nl_get_dev(info);
 570         if (!dev)
 571                 return -ENODEV;
 572
 573         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
 574         if (!msg)
 575                 goto out_dev;
 576
 577         rc = ieee802154_nl_fill_iface(msg, info->snd_pid, info->snd_seq,
 578                         0, dev);
 579         if (rc < 0)
 580                 goto out_free;
 581
 582         dev_put(dev);
 583
 584         return genlmsg_unicast(&init_net, msg, info->snd_pid);
 585 out_free:
 586         nlmsg_free(msg);
 587 out_dev:
 588         dev_put(dev);
 589         return rc;
 590
 591 }
 592
 593 static int ieee802154_dump_iface(struct sk_buff *skb,
 594         struct netlink_callback *cb)
 595 {
 596         struct net *net = sock_net(skb->sk);
 597         struct net_device *dev;
 598         int idx;
 599         int s_idx = cb->args[0];
 600
 601         pr_debug("%s\n", __func__);
 602
 603         idx = 0;
 604         for_each_netdev(net, dev) {
 605                 if (idx < s_idx || (dev->type != ARPHRD_IEEE802154))
 606                         goto cont;
 607
 608                 if (ieee802154_nl_fill_iface(skb, NETLINK_CB(cb->skb).pid,
 609                         cb->nlh->nlmsg_seq, NLM_F_MULTI, dev) < 0)
 610                         break;
 611 cont:
 612                 idx++;
 613         }
 614         cb->args[0] = idx;
 615
 616         return skb->len;
 617 }
 618
 619 #define IEEE802154_OP(_cmd, _func)                      \
 620         {                                               \
 621                 .cmd    = _cmd,                         \
 622                 .policy = ieee802154_policy,            \
 623                 .doit   = _func,                        \
 624                 .dumpit = NULL,                         \
 625                 .flags  = GENL_ADMIN_PERM,              \
 626         }
 627
 628 #define IEEE802154_DUMP(_cmd, _func, _dump)             \
 629         {                                               \
 630                 .cmd    = _cmd,                         \
 631                 .policy = ieee802154_policy,            \
 632                 .doit   = _func,                        \
 633                 .dumpit = _dump,                        \
 634         }
 635
 636 static struct genl_ops ieee802154_coordinator_ops[] = {
 637         IEEE802154_OP(IEEE802154_ASSOCIATE_REQ, ieee802154_associate_req),
 638         IEEE802154_OP(IEEE802154_ASSOCIATE_RESP, ieee802154_associate_resp),
 639         IEEE802154_OP(IEEE802154_DISASSOCIATE_REQ, ieee802154_disassociate_req),
 640         IEEE802154_OP(IEEE802154_SCAN_REQ, ieee802154_scan_req),
 641         IEEE802154_OP(IEEE802154_START_REQ, ieee802154_start_req),
 642         IEEE802154_DUMP(IEEE802154_LIST_IFACE, ieee802154_list_iface,
 643                                                         ieee802154_dump_iface),
 644 };
 645
 646 static int __init ieee802154_nl_init(void)
 647 {
 648         int rc;
 649         int i;
 650
 651         rc = genl_register_family(&ieee802154_coordinator_family);
 652         if (rc)
 653                 goto fail;
 654
 655         rc = genl_register_mc_group(&ieee802154_coordinator_family,
 656                         &ieee802154_coord_mcgrp);
 657         if (rc)
 658                 goto fail;
 659
 660         rc = genl_register_mc_group(&ieee802154_coordinator_family,
 661                         &ieee802154_beacon_mcgrp);
 662         if (rc)
 663                 goto fail;
 664
 665
 666         for (i = 0; i < ARRAY_SIZE(ieee802154_coordinator_ops); i++) {
 667                 rc = genl_register_ops(&ieee802154_coordinator_family,
 668                                 &ieee802154_coordinator_ops[i]);
 669                 if (rc)
 670                         goto fail;
 671         }
 672
 673         return 0;
 674
 675 fail:
 676         genl_unregister_family(&ieee802154_coordinator_family);
 677         return rc;
 678 }
 679 module_init(ieee802154_nl_init);
 680
 681 static void __exit ieee802154_nl_exit(void)
 682 {
 683         genl_unregister_family(&ieee802154_coordinator_family);
 684 }
 685 module_exit(ieee802154_nl_exit);
 686
 687 MODULE_LICENSE("GPL v2");
 688 MODULE_DESCRIPTION("ieee 802.15.4 configuration interface");
 689