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