xref: /linux/net/ieee802154/nl-mac.c (revision b889fcf63cb62e7fdb7816565e28f44dbe4a76a5)
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 }
616