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, u8 page,
 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         NLA_PUT_U8(msg, IEEE802154_ATTR_PAGE, page);
 255
 256         if (edl)
 257                 NLA_PUT(msg, IEEE802154_ATTR_ED_LIST, 27, edl);
 258
 259         return ieee802154_nl_finish(msg);
 260
 261 nla_put_failure:
 262         nlmsg_free(msg);
 263         return -ENOBUFS;
 264 }
 265 EXPORT_SYMBOL(ieee802154_nl_scan_confirm);
 266
 267 int ieee802154_nl_start_confirm(struct net_device *dev, u8 status)
 268 {
 269         struct sk_buff *msg;
 270
 271         pr_debug("%s\n", __func__);
 272
 273         msg = ieee802154_nl_create(0, IEEE802154_START_CONF);
 274         if (!msg)
 275                 return -ENOBUFS;
 276
 277         NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);
 278         NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);
 279         NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 280                         dev->dev_addr);
 281
 282         NLA_PUT_U8(msg, IEEE802154_ATTR_STATUS, status);
 283
 284         return ieee802154_nl_finish(msg);
 285
 286 nla_put_failure:
 287         nlmsg_free(msg);
 288         return -ENOBUFS;
 289 }
 290 EXPORT_SYMBOL(ieee802154_nl_start_confirm);
 291
 292 static int ieee802154_nl_fill_iface(struct sk_buff *msg, u32 pid,
 293         u32 seq, int flags, struct net_device *dev)
 294 {
 295         void *hdr;
 296
 297         pr_debug("%s\n", __func__);
 298
 299         hdr = genlmsg_put(msg, 0, seq, &ieee802154_coordinator_family, flags,
 300                 IEEE802154_LIST_IFACE);
 301         if (!hdr)
 302                 goto out;
 303
 304         NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);
 305         NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);
 306
 307         NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
 308                 dev->dev_addr);
 309         NLA_PUT_U16(msg, IEEE802154_ATTR_SHORT_ADDR,
 310                 ieee802154_mlme_ops(dev)->get_short_addr(dev));
 311         NLA_PUT_U16(msg, IEEE802154_ATTR_PAN_ID,
 312                 ieee802154_mlme_ops(dev)->get_pan_id(dev));
 313         return genlmsg_end(msg, hdr);
 314
 315 nla_put_failure:
 316         genlmsg_cancel(msg, hdr);
 317 out:
 318         return -EMSGSIZE;
 319 }
 320
 321 /* Requests from userspace */
 322 static struct net_device *ieee802154_nl_get_dev(struct genl_info *info)
 323 {
 324         struct net_device *dev;
 325
 326         if (info->attrs[IEEE802154_ATTR_DEV_NAME]) {
 327                 char name[IFNAMSIZ + 1];
 328                 nla_strlcpy(name, info->attrs[IEEE802154_ATTR_DEV_NAME],
 329                                 sizeof(name));
 330                 dev = dev_get_by_name(&init_net, name);
 331         } else if (info->attrs[IEEE802154_ATTR_DEV_INDEX])
 332                 dev = dev_get_by_index(&init_net,
 333                         nla_get_u32(info->attrs[IEEE802154_ATTR_DEV_INDEX]));
 334         else
 335                 return NULL;
 336
 337         if (!dev)
 338                 return NULL;
 339
 340         if (dev->type != ARPHRD_IEEE802154) {
 341                 dev_put(dev);
 342                 return NULL;
 343         }
 344
 345         return dev;
 346 }
 347
 348 static int ieee802154_associate_req(struct sk_buff *skb,
 349                 struct genl_info *info)
 350 {
 351         struct net_device *dev;
 352         struct ieee802154_addr addr;
 353         u8 page;
 354         int ret = -EINVAL;
 355
 356         if (!info->attrs[IEEE802154_ATTR_CHANNEL] ||
 357             !info->attrs[IEEE802154_ATTR_COORD_PAN_ID] ||
 358             (!info->attrs[IEEE802154_ATTR_COORD_HW_ADDR] &&
 359                 !info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]) ||
 360             !info->attrs[IEEE802154_ATTR_CAPABILITY])
 361                 return -EINVAL;
 362
 363         dev = ieee802154_nl_get_dev(info);
 364         if (!dev)
 365                 return -ENODEV;
 366
 367         if (info->attrs[IEEE802154_ATTR_COORD_HW_ADDR]) {
 368                 addr.addr_type = IEEE802154_ADDR_LONG;
 369                 nla_memcpy(addr.hwaddr,
 370                                 info->attrs[IEEE802154_ATTR_COORD_HW_ADDR],
 371                                 IEEE802154_ADDR_LEN);
 372         } else {
 373                 addr.addr_type = IEEE802154_ADDR_SHORT;
 374                 addr.short_addr = nla_get_u16(
 375                                 info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]);
 376         }
 377         addr.pan_id = nla_get_u16(info->attrs[IEEE802154_ATTR_COORD_PAN_ID]);
 378
 379         if (info->attrs[IEEE802154_ATTR_PAGE])
 380                 page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
 381         else
 382                 page = 0;
 383
 384         ret = ieee802154_mlme_ops(dev)->assoc_req(dev, &addr,
 385                         nla_get_u8(info->attrs[IEEE802154_ATTR_CHANNEL]),
 386                         page,
 387                         nla_get_u8(info->attrs[IEEE802154_ATTR_CAPABILITY]));
 388
 389         dev_put(dev);
 390         return ret;
 391 }
 392
 393 static int ieee802154_associate_resp(struct sk_buff *skb,
 394                 struct genl_info *info)
 395 {
 396         struct net_device *dev;
 397         struct ieee802154_addr addr;
 398         int ret = -EINVAL;
 399
 400         if (!info->attrs[IEEE802154_ATTR_STATUS] ||
 401             !info->attrs[IEEE802154_ATTR_DEST_HW_ADDR] ||
 402             !info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR])
 403                 return -EINVAL;
 404
 405         dev = ieee802154_nl_get_dev(info);
 406         if (!dev)
 407                 return -ENODEV;
 408
 409         addr.addr_type = IEEE802154_ADDR_LONG;
 410         nla_memcpy(addr.hwaddr, info->attrs[IEEE802154_ATTR_DEST_HW_ADDR],
 411                         IEEE802154_ADDR_LEN);
 412         addr.pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
 413
 414
 415         ret = ieee802154_mlme_ops(dev)->assoc_resp(dev, &addr,
 416                 nla_get_u16(info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]),
 417                 nla_get_u8(info->attrs[IEEE802154_ATTR_STATUS]));
 418
 419         dev_put(dev);
 420         return ret;
 421 }
 422
 423 static int ieee802154_disassociate_req(struct sk_buff *skb,
 424                 struct genl_info *info)
 425 {
 426         struct net_device *dev;
 427         struct ieee802154_addr addr;
 428         int ret = -EINVAL;
 429
 430         if ((!info->attrs[IEEE802154_ATTR_DEST_HW_ADDR] &&
 431                 !info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]) ||
 432             !info->attrs[IEEE802154_ATTR_REASON])
 433                 return -EINVAL;
 434
 435         dev = ieee802154_nl_get_dev(info);
 436         if (!dev)
 437                 return -ENODEV;
 438
 439         if (info->attrs[IEEE802154_ATTR_DEST_HW_ADDR]) {
 440                 addr.addr_type = IEEE802154_ADDR_LONG;
 441                 nla_memcpy(addr.hwaddr,
 442                                 info->attrs[IEEE802154_ATTR_DEST_HW_ADDR],
 443                                 IEEE802154_ADDR_LEN);
 444         } else {
 445                 addr.addr_type = IEEE802154_ADDR_SHORT;
 446                 addr.short_addr = nla_get_u16(
 447                                 info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]);
 448         }
 449         addr.pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
 450
 451         ret = ieee802154_mlme_ops(dev)->disassoc_req(dev, &addr,
 452                         nla_get_u8(info->attrs[IEEE802154_ATTR_REASON]));
 453
 454         dev_put(dev);
 455         return ret;
 456 }
 457
 458 /*
 459  * PANid, channel, beacon_order = 15, superframe_order = 15,
 460  * PAN_coordinator, battery_life_extension = 0,
 461  * coord_realignment = 0, security_enable = 0
 462 */
 463 static int ieee802154_start_req(struct sk_buff *skb, struct genl_info *info)
 464 {
 465         struct net_device *dev;
 466         struct ieee802154_addr addr;
 467
 468         u8 channel, bcn_ord, sf_ord;
 469         u8 page;
 470         int pan_coord, blx, coord_realign;
 471         int ret;
 472
 473         if (!info->attrs[IEEE802154_ATTR_COORD_PAN_ID] ||
 474             !info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR] ||
 475             !info->attrs[IEEE802154_ATTR_CHANNEL] ||
 476             !info->attrs[IEEE802154_ATTR_BCN_ORD] ||
 477             !info->attrs[IEEE802154_ATTR_SF_ORD] ||
 478             !info->attrs[IEEE802154_ATTR_PAN_COORD] ||
 479             !info->attrs[IEEE802154_ATTR_BAT_EXT] ||
 480             !info->attrs[IEEE802154_ATTR_COORD_REALIGN]
 481          )
 482                 return -EINVAL;
 483
 484         dev = ieee802154_nl_get_dev(info);
 485         if (!dev)
 486                 return -ENODEV;
 487
 488         addr.addr_type = IEEE802154_ADDR_SHORT;
 489         addr.short_addr = nla_get_u16(
 490                         info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]);
 491         addr.pan_id = nla_get_u16(info->attrs[IEEE802154_ATTR_COORD_PAN_ID]);
 492
 493         channel = nla_get_u8(info->attrs[IEEE802154_ATTR_CHANNEL]);
 494         bcn_ord = nla_get_u8(info->attrs[IEEE802154_ATTR_BCN_ORD]);
 495         sf_ord = nla_get_u8(info->attrs[IEEE802154_ATTR_SF_ORD]);
 496         pan_coord = nla_get_u8(info->attrs[IEEE802154_ATTR_PAN_COORD]);
 497         blx = nla_get_u8(info->attrs[IEEE802154_ATTR_BAT_EXT]);
 498         coord_realign = nla_get_u8(info->attrs[IEEE802154_ATTR_COORD_REALIGN]);
 499
 500         if (info->attrs[IEEE802154_ATTR_PAGE])
 501                 page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
 502         else
 503                 page = 0;
 504
 505
 506         if (addr.short_addr == IEEE802154_ADDR_BROADCAST) {
 507                 ieee802154_nl_start_confirm(dev, IEEE802154_NO_SHORT_ADDRESS);
 508                 dev_put(dev);
 509                 return -EINVAL;
 510         }
 511
 512         ret = ieee802154_mlme_ops(dev)->start_req(dev, &addr, channel, page,
 513                 bcn_ord, sf_ord, pan_coord, blx, coord_realign);
 514
 515         dev_put(dev);
 516         return ret;
 517 }
 518
 519 static int ieee802154_scan_req(struct sk_buff *skb, struct genl_info *info)
 520 {
 521         struct net_device *dev;
 522         int ret;
 523         u8 type;
 524         u32 channels;
 525         u8 duration;
 526         u8 page;
 527
 528         if (!info->attrs[IEEE802154_ATTR_SCAN_TYPE] ||
 529             !info->attrs[IEEE802154_ATTR_CHANNELS] ||
 530             !info->attrs[IEEE802154_ATTR_DURATION])
 531                 return -EINVAL;
 532
 533         dev = ieee802154_nl_get_dev(info);
 534         if (!dev)
 535                 return -ENODEV;
 536
 537         type = nla_get_u8(info->attrs[IEEE802154_ATTR_SCAN_TYPE]);
 538         channels = nla_get_u32(info->attrs[IEEE802154_ATTR_CHANNELS]);
 539         duration = nla_get_u8(info->attrs[IEEE802154_ATTR_DURATION]);
 540
 541         if (info->attrs[IEEE802154_ATTR_PAGE])
 542                 page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
 543         else
 544                 page = 0;
 545
 546
 547         ret = ieee802154_mlme_ops(dev)->scan_req(dev, type, channels, page,
 548                         duration);
 549
 550         dev_put(dev);
 551         return ret;
 552 }
 553
 554 static int ieee802154_list_iface(struct sk_buff *skb,
 555         struct genl_info *info)
 556 {
 557         /* Request for interface name, index, type, IEEE address,
 558            PAN Id, short address */
 559         struct sk_buff *msg;
 560         struct net_device *dev = NULL;
 561         int rc = -ENOBUFS;
 562
 563         pr_debug("%s\n", __func__);
 564
 565         dev = ieee802154_nl_get_dev(info);
 566         if (!dev)
 567                 return -ENODEV;
 568
 569         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
 570         if (!msg)
 571                 goto out_dev;
 572
 573         rc = ieee802154_nl_fill_iface(msg, info->snd_pid, info->snd_seq,
 574                         0, dev);
 575         if (rc < 0)
 576                 goto out_free;
 577
 578         dev_put(dev);
 579
 580         return genlmsg_unicast(&init_net, msg, info->snd_pid);
 581 out_free:
 582         nlmsg_free(msg);
 583 out_dev:
 584         dev_put(dev);
 585         return rc;
 586
 587 }
 588
 589 static int ieee802154_dump_iface(struct sk_buff *skb,
 590         struct netlink_callback *cb)
 591 {
 592         struct net *net = sock_net(skb->sk);
 593         struct net_device *dev;
 594         int idx;
 595         int s_idx = cb->args[0];
 596
 597         pr_debug("%s\n", __func__);
 598
 599         idx = 0;
 600         for_each_netdev(net, dev) {
 601                 if (idx < s_idx || (dev->type != ARPHRD_IEEE802154))
 602                         goto cont;
 603
 604                 if (ieee802154_nl_fill_iface(skb, NETLINK_CB(cb->skb).pid,
 605                         cb->nlh->nlmsg_seq, NLM_F_MULTI, dev) < 0)
 606                         break;
 607 cont:
 608                 idx++;
 609         }
 610         cb->args[0] = idx;
 611
 612         return skb->len;
 613 }
 614
 615 #define IEEE802154_OP(_cmd, _func)                      \
 616         {                                               \
 617                 .cmd    = _cmd,                         \
 618                 .policy = ieee802154_policy,            \
 619                 .doit   = _func,                        \
 620                 .dumpit = NULL,                         \
 621                 .flags  = GENL_ADMIN_PERM,              \
 622         }
 623
 624 #define IEEE802154_DUMP(_cmd, _func, _dump)             \
 625         {                                               \
 626                 .cmd    = _cmd,                         \
 627                 .policy = ieee802154_policy,            \
 628                 .doit   = _func,                        \
 629                 .dumpit = _dump,                        \
 630         }
 631
 632 static struct genl_ops ieee802154_coordinator_ops[] = {
 633         IEEE802154_OP(IEEE802154_ASSOCIATE_REQ, ieee802154_associate_req),
 634         IEEE802154_OP(IEEE802154_ASSOCIATE_RESP, ieee802154_associate_resp),
 635         IEEE802154_OP(IEEE802154_DISASSOCIATE_REQ, ieee802154_disassociate_req),
 636         IEEE802154_OP(IEEE802154_SCAN_REQ, ieee802154_scan_req),
 637         IEEE802154_OP(IEEE802154_START_REQ, ieee802154_start_req),
 638         IEEE802154_DUMP(IEEE802154_LIST_IFACE, ieee802154_list_iface,
 639                                                         ieee802154_dump_iface),
 640 };
 641
 642 static int __init ieee802154_nl_init(void)
 643 {
 644         int rc;
 645         int i;
 646
 647         rc = genl_register_family(&ieee802154_coordinator_family);
 648         if (rc)
 649                 goto fail;
 650
 651         rc = genl_register_mc_group(&ieee802154_coordinator_family,
 652                         &ieee802154_coord_mcgrp);
 653         if (rc)
 654                 goto fail;
 655
 656         rc = genl_register_mc_group(&ieee802154_coordinator_family,
 657                         &ieee802154_beacon_mcgrp);
 658         if (rc)
 659                 goto fail;
 660
 661
 662         for (i = 0; i < ARRAY_SIZE(ieee802154_coordinator_ops); i++) {
 663                 rc = genl_register_ops(&ieee802154_coordinator_family,
 664                                 &ieee802154_coordinator_ops[i]);
 665                 if (rc)
 666                         goto fail;
 667         }
 668
 669         return 0;
 670
 671 fail:
 672         genl_unregister_family(&ieee802154_coordinator_family);
 673         return rc;
 674 }
 675 module_init(ieee802154_nl_init);
 676
 677 static void __exit ieee802154_nl_exit(void)
 678 {
 679         genl_unregister_family(&ieee802154_coordinator_family);
 680 }
 681 module_exit(ieee802154_nl_exit);
 682
 683 MODULE_LICENSE("GPL v2");
 684 MODULE_DESCRIPTION("ieee 802.15.4 configuration interface");
 685