1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2007-2012 Siemens AG
4 *
5 * Written by:
6 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
7 * Sergey Lapin <slapin@ossfans.org>
8 * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
9 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
10 */
11
12 #include <linux/netdevice.h>
13 #include <linux/module.h>
14 #include <linux/if_arp.h>
15 #include <linux/ieee802154.h>
16
17 #include <net/nl802154.h>
18 #include <net/mac802154.h>
19 #include <net/ieee802154_netdev.h>
20 #include <net/cfg802154.h>
21
22 #include "ieee802154_i.h"
23 #include "driver-ops.h"
24
mac802154_wpan_update_llsec(struct net_device * dev)25 int mac802154_wpan_update_llsec(struct net_device *dev)
26 {
27 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
28 struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
29 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
30 int rc = 0;
31
32 if (ops->llsec) {
33 struct ieee802154_llsec_params params;
34 int changed = 0;
35
36 params.pan_id = wpan_dev->pan_id;
37 changed |= IEEE802154_LLSEC_PARAM_PAN_ID;
38
39 params.hwaddr = wpan_dev->extended_addr;
40 changed |= IEEE802154_LLSEC_PARAM_HWADDR;
41
42 rc = ops->llsec->set_params(dev, ¶ms, changed);
43 }
44
45 return rc;
46 }
47
48 static int
mac802154_wpan_ioctl(struct net_device * dev,struct ifreq * ifr,int cmd)49 mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
50 {
51 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
52 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
53 struct sockaddr_ieee802154 *sa =
54 (struct sockaddr_ieee802154 *)&ifr->ifr_addr;
55 int err = -ENOIOCTLCMD;
56
57 if (cmd != SIOCGIFADDR && cmd != SIOCSIFADDR)
58 return err;
59
60 rtnl_lock();
61
62 switch (cmd) {
63 case SIOCGIFADDR:
64 {
65 u16 pan_id, short_addr;
66
67 pan_id = le16_to_cpu(wpan_dev->pan_id);
68 short_addr = le16_to_cpu(wpan_dev->short_addr);
69 if (pan_id == IEEE802154_PANID_BROADCAST ||
70 short_addr == IEEE802154_ADDR_BROADCAST) {
71 err = -EADDRNOTAVAIL;
72 break;
73 }
74
75 sa->family = AF_IEEE802154;
76 sa->addr.addr_type = IEEE802154_ADDR_SHORT;
77 sa->addr.pan_id = pan_id;
78 sa->addr.short_addr = short_addr;
79
80 err = 0;
81 break;
82 }
83 case SIOCSIFADDR:
84 if (netif_running(dev)) {
85 rtnl_unlock();
86 return -EBUSY;
87 }
88
89 dev_warn(&dev->dev,
90 "Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
91 if (sa->family != AF_IEEE802154 ||
92 sa->addr.addr_type != IEEE802154_ADDR_SHORT ||
93 sa->addr.pan_id == IEEE802154_PANID_BROADCAST ||
94 sa->addr.short_addr == IEEE802154_ADDR_BROADCAST ||
95 sa->addr.short_addr == IEEE802154_ADDR_UNDEF) {
96 err = -EINVAL;
97 break;
98 }
99
100 wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id);
101 wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr);
102
103 err = mac802154_wpan_update_llsec(dev);
104 break;
105 }
106
107 rtnl_unlock();
108 return err;
109 }
110
mac802154_wpan_mac_addr(struct net_device * dev,void * p)111 static int mac802154_wpan_mac_addr(struct net_device *dev, void *p)
112 {
113 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
114 struct sockaddr *addr = p;
115 __le64 extended_addr;
116
117 if (netif_running(dev))
118 return -EBUSY;
119
120 /* lowpan need to be down for update
121 * SLAAC address after ifup
122 */
123 if (sdata->wpan_dev.lowpan_dev) {
124 if (netif_running(sdata->wpan_dev.lowpan_dev))
125 return -EBUSY;
126 }
127
128 ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
129 if (!ieee802154_is_valid_extended_unicast_addr(extended_addr))
130 return -EINVAL;
131
132 dev_addr_set(dev, addr->sa_data);
133 sdata->wpan_dev.extended_addr = extended_addr;
134
135 /* update lowpan interface mac address when
136 * wpan mac has been changed
137 */
138 if (sdata->wpan_dev.lowpan_dev)
139 dev_addr_set(sdata->wpan_dev.lowpan_dev, dev->dev_addr);
140
141 return mac802154_wpan_update_llsec(dev);
142 }
143
ieee802154_setup_hw(struct ieee802154_sub_if_data * sdata)144 static int ieee802154_setup_hw(struct ieee802154_sub_if_data *sdata)
145 {
146 struct ieee802154_local *local = sdata->local;
147 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
148 int ret;
149
150 if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
151 ret = drv_set_promiscuous_mode(local,
152 wpan_dev->promiscuous_mode);
153 if (ret < 0)
154 return ret;
155 }
156
157 if (local->hw.flags & IEEE802154_HW_AFILT) {
158 ret = drv_set_pan_id(local, wpan_dev->pan_id);
159 if (ret < 0)
160 return ret;
161
162 ret = drv_set_extended_addr(local, wpan_dev->extended_addr);
163 if (ret < 0)
164 return ret;
165
166 ret = drv_set_short_addr(local, wpan_dev->short_addr);
167 if (ret < 0)
168 return ret;
169 }
170
171 if (local->hw.flags & IEEE802154_HW_LBT) {
172 ret = drv_set_lbt_mode(local, wpan_dev->lbt);
173 if (ret < 0)
174 return ret;
175 }
176
177 if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
178 ret = drv_set_csma_params(local, wpan_dev->min_be,
179 wpan_dev->max_be,
180 wpan_dev->csma_retries);
181 if (ret < 0)
182 return ret;
183 }
184
185 if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
186 ret = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
187 if (ret < 0)
188 return ret;
189 }
190
191 return 0;
192 }
193
mac802154_slave_open(struct net_device * dev)194 static int mac802154_slave_open(struct net_device *dev)
195 {
196 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
197 struct ieee802154_local *local = sdata->local;
198 int res;
199
200 ASSERT_RTNL();
201
202 set_bit(SDATA_STATE_RUNNING, &sdata->state);
203
204 if (!local->open_count) {
205 res = ieee802154_setup_hw(sdata);
206 if (res)
207 goto err;
208
209 res = drv_start(local);
210 if (res)
211 goto err;
212 }
213
214 local->open_count++;
215 netif_start_queue(dev);
216 return 0;
217 err:
218 /* might already be clear but that doesn't matter */
219 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
220
221 return res;
222 }
223
224 static int
ieee802154_check_mac_settings(struct ieee802154_local * local,struct wpan_dev * wpan_dev,struct wpan_dev * nwpan_dev)225 ieee802154_check_mac_settings(struct ieee802154_local *local,
226 struct wpan_dev *wpan_dev,
227 struct wpan_dev *nwpan_dev)
228 {
229 ASSERT_RTNL();
230
231 if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
232 if (wpan_dev->promiscuous_mode != nwpan_dev->promiscuous_mode)
233 return -EBUSY;
234 }
235
236 if (local->hw.flags & IEEE802154_HW_AFILT) {
237 if (wpan_dev->pan_id != nwpan_dev->pan_id ||
238 wpan_dev->short_addr != nwpan_dev->short_addr ||
239 wpan_dev->extended_addr != nwpan_dev->extended_addr)
240 return -EBUSY;
241 }
242
243 if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
244 if (wpan_dev->min_be != nwpan_dev->min_be ||
245 wpan_dev->max_be != nwpan_dev->max_be ||
246 wpan_dev->csma_retries != nwpan_dev->csma_retries)
247 return -EBUSY;
248 }
249
250 if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
251 if (wpan_dev->frame_retries != nwpan_dev->frame_retries)
252 return -EBUSY;
253 }
254
255 if (local->hw.flags & IEEE802154_HW_LBT) {
256 if (wpan_dev->lbt != nwpan_dev->lbt)
257 return -EBUSY;
258 }
259
260 return 0;
261 }
262
263 static int
ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data * sdata,enum nl802154_iftype iftype)264 ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata,
265 enum nl802154_iftype iftype)
266 {
267 struct ieee802154_local *local = sdata->local;
268 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
269 struct ieee802154_sub_if_data *nsdata;
270
271 /* we hold the RTNL here so can safely walk the list */
272 list_for_each_entry(nsdata, &local->interfaces, list) {
273 if (nsdata != sdata && ieee802154_sdata_running(nsdata)) {
274 int ret;
275
276 /* TODO currently we don't support multiple node types
277 * we need to run skb_clone at rx path. Check if there
278 * exist really an use case if we need to support
279 * multiple node types at the same time.
280 */
281 if (wpan_dev->iftype == NL802154_IFTYPE_NODE &&
282 nsdata->wpan_dev.iftype == NL802154_IFTYPE_NODE)
283 return -EBUSY;
284
285 /* check all phy mac sublayer settings are the same.
286 * We have only one phy, different values makes trouble.
287 */
288 ret = ieee802154_check_mac_settings(local, wpan_dev,
289 &nsdata->wpan_dev);
290 if (ret < 0)
291 return ret;
292 }
293 }
294
295 return 0;
296 }
297
mac802154_wpan_open(struct net_device * dev)298 static int mac802154_wpan_open(struct net_device *dev)
299 {
300 int rc;
301 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
302 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
303
304 rc = ieee802154_check_concurrent_iface(sdata, wpan_dev->iftype);
305 if (rc < 0)
306 return rc;
307
308 return mac802154_slave_open(dev);
309 }
310
mac802154_slave_close(struct net_device * dev)311 static int mac802154_slave_close(struct net_device *dev)
312 {
313 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
314 struct ieee802154_local *local = sdata->local;
315
316 ASSERT_RTNL();
317
318 netif_stop_queue(dev);
319 local->open_count--;
320
321 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
322
323 if (!local->open_count)
324 ieee802154_stop_device(local);
325
326 return 0;
327 }
328
mac802154_set_header_security(struct ieee802154_sub_if_data * sdata,struct ieee802154_hdr * hdr,const struct ieee802154_mac_cb * cb)329 static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
330 struct ieee802154_hdr *hdr,
331 const struct ieee802154_mac_cb *cb)
332 {
333 struct ieee802154_llsec_params params;
334 u8 level;
335
336 mac802154_llsec_get_params(&sdata->sec, ¶ms);
337
338 if (!params.enabled && cb->secen_override && cb->secen)
339 return -EINVAL;
340 if (!params.enabled ||
341 (cb->secen_override && !cb->secen) ||
342 !params.out_level)
343 return 0;
344 if (cb->seclevel_override && !cb->seclevel)
345 return -EINVAL;
346
347 level = cb->seclevel_override ? cb->seclevel : params.out_level;
348
349 hdr->fc.security_enabled = 1;
350 hdr->sec.level = level;
351 hdr->sec.key_id_mode = params.out_key.mode;
352 if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
353 hdr->sec.short_src = params.out_key.short_source;
354 else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
355 hdr->sec.extended_src = params.out_key.extended_source;
356 hdr->sec.key_id = params.out_key.id;
357
358 return 0;
359 }
360
ieee802154_header_create(struct sk_buff * skb,struct net_device * dev,const struct ieee802154_addr * daddr,const struct ieee802154_addr * saddr,unsigned len)361 static int ieee802154_header_create(struct sk_buff *skb,
362 struct net_device *dev,
363 const struct ieee802154_addr *daddr,
364 const struct ieee802154_addr *saddr,
365 unsigned len)
366 {
367 struct ieee802154_hdr hdr;
368 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
369 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
370 struct ieee802154_mac_cb *cb = mac_cb(skb);
371 int hlen;
372
373 if (!daddr)
374 return -EINVAL;
375
376 memset(&hdr.fc, 0, sizeof(hdr.fc));
377 hdr.fc.type = cb->type;
378 hdr.fc.security_enabled = cb->secen;
379 hdr.fc.ack_request = cb->ackreq;
380 hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF;
381
382 if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
383 return -EINVAL;
384
385 if (!saddr) {
386 if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) ||
387 wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) ||
388 wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
389 hdr.source.mode = IEEE802154_ADDR_LONG;
390 hdr.source.extended_addr = wpan_dev->extended_addr;
391 } else {
392 hdr.source.mode = IEEE802154_ADDR_SHORT;
393 hdr.source.short_addr = wpan_dev->short_addr;
394 }
395
396 hdr.source.pan_id = wpan_dev->pan_id;
397 } else {
398 hdr.source = *(const struct ieee802154_addr *)saddr;
399 }
400
401 hdr.dest = *(const struct ieee802154_addr *)daddr;
402
403 hlen = ieee802154_hdr_push(skb, &hdr);
404 if (hlen < 0)
405 return -EINVAL;
406
407 skb_reset_mac_header(skb);
408 skb->mac_len = hlen;
409
410 if (len > ieee802154_max_payload(&hdr))
411 return -EMSGSIZE;
412
413 return hlen;
414 }
415
416 static const struct wpan_dev_header_ops ieee802154_header_ops = {
417 .create = ieee802154_header_create,
418 };
419
420 /* This header create functionality assumes a 8 byte array for
421 * source and destination pointer at maximum. To adapt this for
422 * the 802.15.4 dataframe header we use extended address handling
423 * here only and intra pan connection. fc fields are mostly fallback
424 * handling. For provide dev_hard_header for dgram sockets.
425 */
mac802154_header_create(struct sk_buff * skb,struct net_device * dev,unsigned short type,const void * daddr,const void * saddr,unsigned len)426 static int mac802154_header_create(struct sk_buff *skb,
427 struct net_device *dev,
428 unsigned short type,
429 const void *daddr,
430 const void *saddr,
431 unsigned len)
432 {
433 struct ieee802154_hdr hdr;
434 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
435 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
436 struct ieee802154_mac_cb cb = { };
437 int hlen;
438
439 if (!daddr)
440 return -EINVAL;
441
442 memset(&hdr.fc, 0, sizeof(hdr.fc));
443 hdr.fc.type = IEEE802154_FC_TYPE_DATA;
444 hdr.fc.ack_request = wpan_dev->ackreq;
445 hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF;
446
447 /* TODO currently a workaround to give zero cb block to set
448 * security parameters defaults according MIB.
449 */
450 if (mac802154_set_header_security(sdata, &hdr, &cb) < 0)
451 return -EINVAL;
452
453 hdr.dest.pan_id = wpan_dev->pan_id;
454 hdr.dest.mode = IEEE802154_ADDR_LONG;
455 ieee802154_be64_to_le64(&hdr.dest.extended_addr, daddr);
456
457 hdr.source.pan_id = hdr.dest.pan_id;
458 hdr.source.mode = IEEE802154_ADDR_LONG;
459
460 if (!saddr)
461 hdr.source.extended_addr = wpan_dev->extended_addr;
462 else
463 ieee802154_be64_to_le64(&hdr.source.extended_addr, saddr);
464
465 hlen = ieee802154_hdr_push(skb, &hdr);
466 if (hlen < 0)
467 return -EINVAL;
468
469 skb_reset_mac_header(skb);
470 skb->mac_len = hlen;
471
472 if (len > ieee802154_max_payload(&hdr))
473 return -EMSGSIZE;
474
475 return hlen;
476 }
477
478 static int
mac802154_header_parse(const struct sk_buff * skb,unsigned char * haddr)479 mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr)
480 {
481 struct ieee802154_hdr hdr;
482
483 if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
484 pr_debug("malformed packet\n");
485 return 0;
486 }
487
488 if (hdr.source.mode == IEEE802154_ADDR_LONG) {
489 ieee802154_le64_to_be64(haddr, &hdr.source.extended_addr);
490 return IEEE802154_EXTENDED_ADDR_LEN;
491 }
492
493 return 0;
494 }
495
496 static const struct header_ops mac802154_header_ops = {
497 .create = mac802154_header_create,
498 .parse = mac802154_header_parse,
499 };
500
501 static const struct net_device_ops mac802154_wpan_ops = {
502 .ndo_open = mac802154_wpan_open,
503 .ndo_stop = mac802154_slave_close,
504 .ndo_start_xmit = ieee802154_subif_start_xmit,
505 .ndo_do_ioctl = mac802154_wpan_ioctl,
506 .ndo_set_mac_address = mac802154_wpan_mac_addr,
507 };
508
509 static const struct net_device_ops mac802154_monitor_ops = {
510 .ndo_open = mac802154_wpan_open,
511 .ndo_stop = mac802154_slave_close,
512 .ndo_start_xmit = ieee802154_monitor_start_xmit,
513 };
514
mac802154_wpan_free(struct net_device * dev)515 static void mac802154_wpan_free(struct net_device *dev)
516 {
517 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
518
519 mac802154_llsec_destroy(&sdata->sec);
520 }
521
ieee802154_if_setup(struct net_device * dev)522 static void ieee802154_if_setup(struct net_device *dev)
523 {
524 dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN;
525 memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);
526
527 /* Let hard_header_len set to IEEE802154_MIN_HEADER_LEN. AF_PACKET
528 * will not send frames without any payload, but ack frames
529 * has no payload, so substract one that we can send a 3 bytes
530 * frame. The xmit callback assumes at least a hard header where two
531 * bytes fc and sequence field are set.
532 */
533 dev->hard_header_len = IEEE802154_MIN_HEADER_LEN - 1;
534 /* The auth_tag header is for security and places in private payload
535 * room of mac frame which stucks between payload and FCS field.
536 */
537 dev->needed_tailroom = IEEE802154_MAX_AUTH_TAG_LEN +
538 IEEE802154_FCS_LEN;
539 /* The mtu size is the payload without mac header in this case.
540 * We have a dynamic length header with a minimum header length
541 * which is hard_header_len. In this case we let mtu to the size
542 * of maximum payload which is IEEE802154_MTU - IEEE802154_FCS_LEN -
543 * hard_header_len. The FCS which is set by hardware or ndo_start_xmit
544 * and the minimum mac header which can be evaluated inside driver
545 * layer. The rest of mac header will be part of payload if greater
546 * than hard_header_len.
547 */
548 dev->mtu = IEEE802154_MTU - IEEE802154_FCS_LEN -
549 dev->hard_header_len;
550 dev->tx_queue_len = 300;
551 dev->flags = IFF_NOARP | IFF_BROADCAST;
552 }
553
554 static int
ieee802154_setup_sdata(struct ieee802154_sub_if_data * sdata,enum nl802154_iftype type)555 ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata,
556 enum nl802154_iftype type)
557 {
558 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
559 int ret;
560 u8 tmp;
561
562 /* set some type-dependent values */
563 sdata->wpan_dev.iftype = type;
564
565 get_random_bytes(&tmp, sizeof(tmp));
566 atomic_set(&wpan_dev->bsn, tmp);
567 get_random_bytes(&tmp, sizeof(tmp));
568 atomic_set(&wpan_dev->dsn, tmp);
569
570 /* defaults per 802.15.4-2011 */
571 wpan_dev->min_be = 3;
572 wpan_dev->max_be = 5;
573 wpan_dev->csma_retries = 4;
574 wpan_dev->frame_retries = 3;
575
576 wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
577 wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
578
579 switch (type) {
580 case NL802154_IFTYPE_NODE:
581 ieee802154_be64_to_le64(&wpan_dev->extended_addr,
582 sdata->dev->dev_addr);
583
584 sdata->dev->header_ops = &mac802154_header_ops;
585 sdata->dev->needs_free_netdev = true;
586 sdata->dev->priv_destructor = mac802154_wpan_free;
587 sdata->dev->netdev_ops = &mac802154_wpan_ops;
588 sdata->dev->ml_priv = &mac802154_mlme_wpan;
589 wpan_dev->promiscuous_mode = false;
590 wpan_dev->header_ops = &ieee802154_header_ops;
591
592 mutex_init(&sdata->sec_mtx);
593
594 mac802154_llsec_init(&sdata->sec);
595 ret = mac802154_wpan_update_llsec(sdata->dev);
596 if (ret < 0)
597 return ret;
598
599 break;
600 case NL802154_IFTYPE_MONITOR:
601 sdata->dev->needs_free_netdev = true;
602 sdata->dev->netdev_ops = &mac802154_monitor_ops;
603 wpan_dev->promiscuous_mode = true;
604 break;
605 default:
606 BUG();
607 }
608
609 return 0;
610 }
611
612 struct net_device *
ieee802154_if_add(struct ieee802154_local * local,const char * name,unsigned char name_assign_type,enum nl802154_iftype type,__le64 extended_addr)613 ieee802154_if_add(struct ieee802154_local *local, const char *name,
614 unsigned char name_assign_type, enum nl802154_iftype type,
615 __le64 extended_addr)
616 {
617 u8 addr[IEEE802154_EXTENDED_ADDR_LEN];
618 struct net_device *ndev = NULL;
619 struct ieee802154_sub_if_data *sdata = NULL;
620 int ret;
621
622 ASSERT_RTNL();
623
624 ndev = alloc_netdev(sizeof(*sdata), name,
625 name_assign_type, ieee802154_if_setup);
626 if (!ndev)
627 return ERR_PTR(-ENOMEM);
628
629 ndev->needed_headroom = local->hw.extra_tx_headroom +
630 IEEE802154_MAX_HEADER_LEN;
631
632 ret = dev_alloc_name(ndev, ndev->name);
633 if (ret < 0)
634 goto err;
635
636 ieee802154_le64_to_be64(ndev->perm_addr,
637 &local->hw.phy->perm_extended_addr);
638 switch (type) {
639 case NL802154_IFTYPE_NODE:
640 ndev->type = ARPHRD_IEEE802154;
641 if (ieee802154_is_valid_extended_unicast_addr(extended_addr)) {
642 ieee802154_le64_to_be64(addr, &extended_addr);
643 dev_addr_set(ndev, addr);
644 } else {
645 dev_addr_set(ndev, ndev->perm_addr);
646 }
647 break;
648 case NL802154_IFTYPE_MONITOR:
649 ndev->type = ARPHRD_IEEE802154_MONITOR;
650 break;
651 default:
652 ret = -EINVAL;
653 goto err;
654 }
655
656 /* TODO check this */
657 SET_NETDEV_DEV(ndev, &local->phy->dev);
658 dev_net_set(ndev, wpan_phy_net(local->hw.phy));
659 sdata = netdev_priv(ndev);
660 ndev->ieee802154_ptr = &sdata->wpan_dev;
661 memcpy(sdata->name, ndev->name, IFNAMSIZ);
662 sdata->dev = ndev;
663 sdata->wpan_dev.wpan_phy = local->hw.phy;
664 sdata->local = local;
665
666 /* setup type-dependent data */
667 ret = ieee802154_setup_sdata(sdata, type);
668 if (ret)
669 goto err;
670
671 ret = register_netdevice(ndev);
672 if (ret < 0)
673 goto err;
674
675 mutex_lock(&local->iflist_mtx);
676 list_add_tail_rcu(&sdata->list, &local->interfaces);
677 mutex_unlock(&local->iflist_mtx);
678
679 return ndev;
680
681 err:
682 free_netdev(ndev);
683 return ERR_PTR(ret);
684 }
685
ieee802154_if_remove(struct ieee802154_sub_if_data * sdata)686 void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
687 {
688 ASSERT_RTNL();
689
690 mutex_lock(&sdata->local->iflist_mtx);
691 list_del_rcu(&sdata->list);
692 mutex_unlock(&sdata->local->iflist_mtx);
693
694 synchronize_rcu();
695 unregister_netdevice(sdata->dev);
696 }
697
ieee802154_remove_interfaces(struct ieee802154_local * local)698 void ieee802154_remove_interfaces(struct ieee802154_local *local)
699 {
700 struct ieee802154_sub_if_data *sdata, *tmp;
701
702 mutex_lock(&local->iflist_mtx);
703 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
704 list_del(&sdata->list);
705
706 unregister_netdevice(sdata->dev);
707 }
708 mutex_unlock(&local->iflist_mtx);
709 }
710
netdev_notify(struct notifier_block * nb,unsigned long state,void * ptr)711 static int netdev_notify(struct notifier_block *nb,
712 unsigned long state, void *ptr)
713 {
714 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
715 struct ieee802154_sub_if_data *sdata;
716
717 if (state != NETDEV_CHANGENAME)
718 return NOTIFY_DONE;
719
720 if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy)
721 return NOTIFY_DONE;
722
723 if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid)
724 return NOTIFY_DONE;
725
726 sdata = IEEE802154_DEV_TO_SUB_IF(dev);
727 memcpy(sdata->name, dev->name, IFNAMSIZ);
728
729 return NOTIFY_OK;
730 }
731
732 static struct notifier_block mac802154_netdev_notifier = {
733 .notifier_call = netdev_notify,
734 };
735
ieee802154_iface_init(void)736 int ieee802154_iface_init(void)
737 {
738 return register_netdevice_notifier(&mac802154_netdev_notifier);
739 }
740
ieee802154_iface_exit(void)741 void ieee802154_iface_exit(void)
742 {
743 unregister_netdevice_notifier(&mac802154_netdev_notifier);
744 }
745