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32bad7e3 | 1 | /* |
2 | * Copyright 2007-2012 Siemens AG | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 | |
6 | * as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
32bad7e3 | 13 | * Written by: |
14 | * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> | |
15 | * Sergey Lapin <slapin@ossfans.org> | |
16 | * Maxim Gorbachyov <maxim.gorbachev@siemens.com> | |
17 | * Alexander Smirnov <alex.bluesman.smirnov@gmail.com> | |
18 | */ | |
19 | ||
20 | #include <linux/netdevice.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/if_arp.h> | |
4ca24aca | 23 | #include <linux/ieee802154.h> |
32bad7e3 | 24 | |
944742a3 | 25 | #include <net/nl802154.h> |
32bad7e3 | 26 | #include <net/mac802154.h> |
27 | #include <net/ieee802154_netdev.h> | |
5ad60d36 | 28 | #include <net/cfg802154.h> |
32bad7e3 | 29 | |
0f1556bc | 30 | #include "ieee802154_i.h" |
59cb300f | 31 | #include "driver-ops.h" |
32bad7e3 | 32 | |
d77b4852 | 33 | int mac802154_wpan_update_llsec(struct net_device *dev) |
9b0bb4a8 | 34 | { |
59d19cd7 | 35 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
9b0bb4a8 | 36 | struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev); |
863e88f2 | 37 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
9b0bb4a8 PB |
38 | int rc = 0; |
39 | ||
40 | if (ops->llsec) { | |
41 | struct ieee802154_llsec_params params; | |
42 | int changed = 0; | |
43 | ||
863e88f2 | 44 | params.pan_id = wpan_dev->pan_id; |
9b0bb4a8 PB |
45 | changed |= IEEE802154_LLSEC_PARAM_PAN_ID; |
46 | ||
863e88f2 | 47 | params.hwaddr = wpan_dev->extended_addr; |
9b0bb4a8 PB |
48 | changed |= IEEE802154_LLSEC_PARAM_HWADDR; |
49 | ||
50 | rc = ops->llsec->set_params(dev, ¶ms, changed); | |
51 | } | |
52 | ||
53 | return rc; | |
54 | } | |
55 | ||
32bad7e3 | 56 | static int |
57 | mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
58 | { | |
59d19cd7 | 59 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
863e88f2 | 60 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
32bad7e3 | 61 | struct sockaddr_ieee802154 *sa = |
62 | (struct sockaddr_ieee802154 *)&ifr->ifr_addr; | |
63 | int err = -ENOIOCTLCMD; | |
64 | ||
e34fd879 LB |
65 | if (cmd != SIOCGIFADDR && cmd != SIOCSIFADDR) |
66 | return err; | |
67 | ||
4a669f7d | 68 | rtnl_lock(); |
32bad7e3 | 69 | |
70 | switch (cmd) { | |
71 | case SIOCGIFADDR: | |
b70ab2e8 PB |
72 | { |
73 | u16 pan_id, short_addr; | |
74 | ||
863e88f2 AA |
75 | pan_id = le16_to_cpu(wpan_dev->pan_id); |
76 | short_addr = le16_to_cpu(wpan_dev->short_addr); | |
b70ab2e8 PB |
77 | if (pan_id == IEEE802154_PANID_BROADCAST || |
78 | short_addr == IEEE802154_ADDR_BROADCAST) { | |
32bad7e3 | 79 | err = -EADDRNOTAVAIL; |
80 | break; | |
81 | } | |
82 | ||
83 | sa->family = AF_IEEE802154; | |
84 | sa->addr.addr_type = IEEE802154_ADDR_SHORT; | |
b70ab2e8 PB |
85 | sa->addr.pan_id = pan_id; |
86 | sa->addr.short_addr = short_addr; | |
32bad7e3 | 87 | |
88 | err = 0; | |
89 | break; | |
b70ab2e8 | 90 | } |
32bad7e3 | 91 | case SIOCSIFADDR: |
f7cb96f1 | 92 | if (netif_running(dev)) { |
4a669f7d | 93 | rtnl_unlock(); |
f7cb96f1 AA |
94 | return -EBUSY; |
95 | } | |
96 | ||
32bad7e3 | 97 | dev_warn(&dev->dev, |
9b13494c | 98 | "Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n"); |
32bad7e3 | 99 | if (sa->family != AF_IEEE802154 || |
100 | sa->addr.addr_type != IEEE802154_ADDR_SHORT || | |
101 | sa->addr.pan_id == IEEE802154_PANID_BROADCAST || | |
102 | sa->addr.short_addr == IEEE802154_ADDR_BROADCAST || | |
103 | sa->addr.short_addr == IEEE802154_ADDR_UNDEF) { | |
104 | err = -EINVAL; | |
105 | break; | |
106 | } | |
107 | ||
863e88f2 AA |
108 | wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id); |
109 | wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr); | |
32bad7e3 | 110 | |
9b0bb4a8 | 111 | err = mac802154_wpan_update_llsec(dev); |
32bad7e3 | 112 | break; |
113 | } | |
114 | ||
4a669f7d | 115 | rtnl_unlock(); |
32bad7e3 | 116 | return err; |
117 | } | |
118 | ||
119 | static int mac802154_wpan_mac_addr(struct net_device *dev, void *p) | |
120 | { | |
776e59de | 121 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
32bad7e3 | 122 | struct sockaddr *addr = p; |
ea7053c1 | 123 | __le64 extended_addr; |
32bad7e3 | 124 | |
125 | if (netif_running(dev)) | |
126 | return -EBUSY; | |
127 | ||
09095fdc AA |
128 | /* lowpan need to be down for update |
129 | * SLAAC address after ifup | |
130 | */ | |
131 | if (sdata->wpan_dev.lowpan_dev) { | |
132 | if (netif_running(sdata->wpan_dev.lowpan_dev)) | |
133 | return -EBUSY; | |
134 | } | |
135 | ||
705cbbbe | 136 | ieee802154_be64_to_le64(&extended_addr, addr->sa_data); |
daf4e2c8 | 137 | if (!ieee802154_is_valid_extended_unicast_addr(extended_addr)) |
ea7053c1 AA |
138 | return -EINVAL; |
139 | ||
32bad7e3 | 140 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); |
863e88f2 | 141 | sdata->wpan_dev.extended_addr = extended_addr; |
776e59de | 142 | |
09095fdc AA |
143 | /* update lowpan interface mac address when |
144 | * wpan mac has been changed | |
145 | */ | |
146 | if (sdata->wpan_dev.lowpan_dev) | |
147 | memcpy(sdata->wpan_dev.lowpan_dev->dev_addr, dev->dev_addr, | |
148 | dev->addr_len); | |
149 | ||
9b0bb4a8 | 150 | return mac802154_wpan_update_llsec(dev); |
32bad7e3 | 151 | } |
152 | ||
95c0aa15 AA |
153 | static int ieee802154_setup_hw(struct ieee802154_sub_if_data *sdata) |
154 | { | |
155 | struct ieee802154_local *local = sdata->local; | |
156 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; | |
157 | int ret; | |
158 | ||
159 | if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) { | |
160 | ret = drv_set_promiscuous_mode(local, | |
161 | wpan_dev->promiscuous_mode); | |
162 | if (ret < 0) | |
163 | return ret; | |
164 | } | |
165 | ||
166 | if (local->hw.flags & IEEE802154_HW_AFILT) { | |
167 | ret = drv_set_pan_id(local, wpan_dev->pan_id); | |
168 | if (ret < 0) | |
169 | return ret; | |
170 | ||
171 | ret = drv_set_extended_addr(local, wpan_dev->extended_addr); | |
172 | if (ret < 0) | |
173 | return ret; | |
174 | ||
175 | ret = drv_set_short_addr(local, wpan_dev->short_addr); | |
176 | if (ret < 0) | |
177 | return ret; | |
178 | } | |
179 | ||
180 | if (local->hw.flags & IEEE802154_HW_LBT) { | |
181 | ret = drv_set_lbt_mode(local, wpan_dev->lbt); | |
182 | if (ret < 0) | |
183 | return ret; | |
184 | } | |
185 | ||
186 | if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) { | |
187 | ret = drv_set_csma_params(local, wpan_dev->min_be, | |
188 | wpan_dev->max_be, | |
189 | wpan_dev->csma_retries); | |
190 | if (ret < 0) | |
191 | return ret; | |
192 | } | |
193 | ||
194 | if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) { | |
195 | ret = drv_set_max_frame_retries(local, wpan_dev->frame_retries); | |
196 | if (ret < 0) | |
197 | return ret; | |
198 | } | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
19ec690a AA |
203 | static int mac802154_slave_open(struct net_device *dev) |
204 | { | |
205 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); | |
19ec690a | 206 | struct ieee802154_local *local = sdata->local; |
5c698e8b | 207 | int res; |
19ec690a AA |
208 | |
209 | ASSERT_RTNL(); | |
210 | ||
0ea3da64 | 211 | set_bit(SDATA_STATE_RUNNING, &sdata->state); |
19ec690a | 212 | |
74457641 | 213 | if (!local->open_count) { |
95c0aa15 AA |
214 | res = ieee802154_setup_hw(sdata); |
215 | if (res) | |
216 | goto err; | |
217 | ||
59cb300f | 218 | res = drv_start(local); |
19ec690a AA |
219 | if (res) |
220 | goto err; | |
221 | } | |
222 | ||
74457641 | 223 | local->open_count++; |
19ec690a AA |
224 | netif_start_queue(dev); |
225 | return 0; | |
226 | err: | |
0ea3da64 AA |
227 | /* might already be clear but that doesn't matter */ |
228 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); | |
19ec690a AA |
229 | |
230 | return res; | |
231 | } | |
232 | ||
bd37a78d AA |
233 | static int |
234 | ieee802154_check_mac_settings(struct ieee802154_local *local, | |
235 | struct wpan_dev *wpan_dev, | |
236 | struct wpan_dev *nwpan_dev) | |
237 | { | |
238 | ASSERT_RTNL(); | |
239 | ||
240 | if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) { | |
241 | if (wpan_dev->promiscuous_mode != nwpan_dev->promiscuous_mode) | |
242 | return -EBUSY; | |
243 | } | |
244 | ||
245 | if (local->hw.flags & IEEE802154_HW_AFILT) { | |
8bf9538a AA |
246 | if (wpan_dev->pan_id != nwpan_dev->pan_id || |
247 | wpan_dev->short_addr != nwpan_dev->short_addr || | |
248 | wpan_dev->extended_addr != nwpan_dev->extended_addr) | |
bd37a78d AA |
249 | return -EBUSY; |
250 | } | |
251 | ||
252 | if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) { | |
8bf9538a AA |
253 | if (wpan_dev->min_be != nwpan_dev->min_be || |
254 | wpan_dev->max_be != nwpan_dev->max_be || | |
255 | wpan_dev->csma_retries != nwpan_dev->csma_retries) | |
bd37a78d AA |
256 | return -EBUSY; |
257 | } | |
258 | ||
259 | if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) { | |
260 | if (wpan_dev->frame_retries != nwpan_dev->frame_retries) | |
261 | return -EBUSY; | |
262 | } | |
263 | ||
264 | if (local->hw.flags & IEEE802154_HW_LBT) { | |
265 | if (wpan_dev->lbt != nwpan_dev->lbt) | |
266 | return -EBUSY; | |
267 | } | |
268 | ||
269 | return 0; | |
270 | } | |
271 | ||
272 | static int | |
273 | ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata, | |
274 | enum nl802154_iftype iftype) | |
275 | { | |
276 | struct ieee802154_local *local = sdata->local; | |
277 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; | |
278 | struct ieee802154_sub_if_data *nsdata; | |
279 | ||
280 | /* we hold the RTNL here so can safely walk the list */ | |
281 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
282 | if (nsdata != sdata && ieee802154_sdata_running(nsdata)) { | |
283 | int ret; | |
284 | ||
cd1c5665 AA |
285 | /* TODO currently we don't support multiple node types |
286 | * we need to run skb_clone at rx path. Check if there | |
287 | * exist really an use case if we need to support | |
288 | * multiple node types at the same time. | |
289 | */ | |
ed65963b AA |
290 | if (wpan_dev->iftype == NL802154_IFTYPE_NODE && |
291 | nsdata->wpan_dev.iftype == NL802154_IFTYPE_NODE) | |
cd1c5665 AA |
292 | return -EBUSY; |
293 | ||
bd37a78d AA |
294 | /* check all phy mac sublayer settings are the same. |
295 | * We have only one phy, different values makes trouble. | |
296 | */ | |
297 | ret = ieee802154_check_mac_settings(local, wpan_dev, | |
298 | &nsdata->wpan_dev); | |
299 | if (ret < 0) | |
300 | return ret; | |
301 | } | |
302 | } | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
6ef0023a | 307 | static int mac802154_wpan_open(struct net_device *dev) |
e462ded6 PB |
308 | { |
309 | int rc; | |
59d19cd7 | 310 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
863e88f2 | 311 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
e462ded6 | 312 | |
ed65963b | 313 | rc = ieee802154_check_concurrent_iface(sdata, wpan_dev->iftype); |
bd37a78d AA |
314 | if (rc < 0) |
315 | return rc; | |
316 | ||
95c0aa15 | 317 | return mac802154_slave_open(dev); |
e462ded6 PB |
318 | } |
319 | ||
19ec690a AA |
320 | static int mac802154_slave_close(struct net_device *dev) |
321 | { | |
322 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); | |
323 | struct ieee802154_local *local = sdata->local; | |
324 | ||
325 | ASSERT_RTNL(); | |
326 | ||
327 | netif_stop_queue(dev); | |
74457641 | 328 | local->open_count--; |
19ec690a | 329 | |
0ea3da64 | 330 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
19ec690a | 331 | |
c4227c8a AA |
332 | if (!local->open_count) |
333 | ieee802154_stop_device(local); | |
19ec690a AA |
334 | |
335 | return 0; | |
336 | } | |
337 | ||
036562f9 | 338 | static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata, |
f30be4d5 PB |
339 | struct ieee802154_hdr *hdr, |
340 | const struct ieee802154_mac_cb *cb) | |
341 | { | |
342 | struct ieee802154_llsec_params params; | |
343 | u8 level; | |
344 | ||
036562f9 | 345 | mac802154_llsec_get_params(&sdata->sec, ¶ms); |
f30be4d5 PB |
346 | |
347 | if (!params.enabled && cb->secen_override && cb->secen) | |
348 | return -EINVAL; | |
349 | if (!params.enabled || | |
350 | (cb->secen_override && !cb->secen) || | |
351 | !params.out_level) | |
352 | return 0; | |
353 | if (cb->seclevel_override && !cb->seclevel) | |
354 | return -EINVAL; | |
355 | ||
356 | level = cb->seclevel_override ? cb->seclevel : params.out_level; | |
357 | ||
358 | hdr->fc.security_enabled = 1; | |
359 | hdr->sec.level = level; | |
360 | hdr->sec.key_id_mode = params.out_key.mode; | |
361 | if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX) | |
362 | hdr->sec.short_src = params.out_key.short_source; | |
363 | else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX) | |
364 | hdr->sec.extended_src = params.out_key.extended_source; | |
365 | hdr->sec.key_id = params.out_key.id; | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
838b83d6 AA |
370 | static int ieee802154_header_create(struct sk_buff *skb, |
371 | struct net_device *dev, | |
372 | const struct ieee802154_addr *daddr, | |
373 | const struct ieee802154_addr *saddr, | |
374 | unsigned len) | |
32bad7e3 | 375 | { |
e6278d92 | 376 | struct ieee802154_hdr hdr; |
59d19cd7 | 377 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
863e88f2 | 378 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
32edc40a | 379 | struct ieee802154_mac_cb *cb = mac_cb(skb); |
e6278d92 | 380 | int hlen; |
32bad7e3 | 381 | |
382 | if (!daddr) | |
383 | return -EINVAL; | |
384 | ||
e6278d92 | 385 | memset(&hdr.fc, 0, sizeof(hdr.fc)); |
32edc40a PB |
386 | hdr.fc.type = cb->type; |
387 | hdr.fc.security_enabled = cb->secen; | |
388 | hdr.fc.ack_request = cb->ackreq; | |
344f8c11 | 389 | hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF; |
32bad7e3 | 390 | |
036562f9 | 391 | if (mac802154_set_header_security(sdata, &hdr, cb) < 0) |
f30be4d5 PB |
392 | return -EINVAL; |
393 | ||
32bad7e3 | 394 | if (!saddr) { |
863e88f2 AA |
395 | if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) || |
396 | wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) || | |
397 | wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) { | |
e6278d92 | 398 | hdr.source.mode = IEEE802154_ADDR_LONG; |
863e88f2 | 399 | hdr.source.extended_addr = wpan_dev->extended_addr; |
32bad7e3 | 400 | } else { |
e6278d92 | 401 | hdr.source.mode = IEEE802154_ADDR_SHORT; |
863e88f2 | 402 | hdr.source.short_addr = wpan_dev->short_addr; |
32bad7e3 | 403 | } |
404 | ||
863e88f2 | 405 | hdr.source.pan_id = wpan_dev->pan_id; |
e6278d92 PB |
406 | } else { |
407 | hdr.source = *(const struct ieee802154_addr *)saddr; | |
32bad7e3 | 408 | } |
409 | ||
e6278d92 | 410 | hdr.dest = *(const struct ieee802154_addr *)daddr; |
32bad7e3 | 411 | |
e6278d92 PB |
412 | hlen = ieee802154_hdr_push(skb, &hdr); |
413 | if (hlen < 0) | |
414 | return -EINVAL; | |
32bad7e3 | 415 | |
3e69162e | 416 | skb_reset_mac_header(skb); |
e6278d92 | 417 | skb->mac_len = hlen; |
32bad7e3 | 418 | |
8c84296f | 419 | if (len > ieee802154_max_payload(&hdr)) |
d1d7358e PB |
420 | return -EMSGSIZE; |
421 | ||
e6278d92 | 422 | return hlen; |
32bad7e3 | 423 | } |
424 | ||
838b83d6 AA |
425 | static const struct wpan_dev_header_ops ieee802154_header_ops = { |
426 | .create = ieee802154_header_create, | |
427 | }; | |
428 | ||
429 | /* This header create functionality assumes a 8 byte array for | |
430 | * source and destination pointer at maximum. To adapt this for | |
431 | * the 802.15.4 dataframe header we use extended address handling | |
432 | * here only and intra pan connection. fc fields are mostly fallback | |
433 | * handling. For provide dev_hard_header for dgram sockets. | |
434 | */ | |
435 | static int mac802154_header_create(struct sk_buff *skb, | |
436 | struct net_device *dev, | |
437 | unsigned short type, | |
438 | const void *daddr, | |
439 | const void *saddr, | |
440 | unsigned len) | |
441 | { | |
442 | struct ieee802154_hdr hdr; | |
443 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); | |
444 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; | |
445 | struct ieee802154_mac_cb cb = { }; | |
446 | int hlen; | |
447 | ||
448 | if (!daddr) | |
449 | return -EINVAL; | |
450 | ||
451 | memset(&hdr.fc, 0, sizeof(hdr.fc)); | |
452 | hdr.fc.type = IEEE802154_FC_TYPE_DATA; | |
453 | hdr.fc.ack_request = wpan_dev->ackreq; | |
454 | hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF; | |
455 | ||
456 | /* TODO currently a workaround to give zero cb block to set | |
457 | * security parameters defaults according MIB. | |
458 | */ | |
459 | if (mac802154_set_header_security(sdata, &hdr, &cb) < 0) | |
460 | return -EINVAL; | |
461 | ||
462 | hdr.dest.pan_id = wpan_dev->pan_id; | |
463 | hdr.dest.mode = IEEE802154_ADDR_LONG; | |
c2d5ecfa | 464 | ieee802154_be64_to_le64(&hdr.dest.extended_addr, daddr); |
838b83d6 AA |
465 | |
466 | hdr.source.pan_id = hdr.dest.pan_id; | |
467 | hdr.source.mode = IEEE802154_ADDR_LONG; | |
468 | ||
469 | if (!saddr) | |
470 | hdr.source.extended_addr = wpan_dev->extended_addr; | |
471 | else | |
c2d5ecfa | 472 | ieee802154_be64_to_le64(&hdr.source.extended_addr, saddr); |
838b83d6 AA |
473 | |
474 | hlen = ieee802154_hdr_push(skb, &hdr); | |
475 | if (hlen < 0) | |
476 | return -EINVAL; | |
477 | ||
478 | skb_reset_mac_header(skb); | |
479 | skb->mac_len = hlen; | |
480 | ||
481 | if (len > ieee802154_max_payload(&hdr)) | |
482 | return -EMSGSIZE; | |
483 | ||
484 | return hlen; | |
485 | } | |
486 | ||
32bad7e3 | 487 | static int |
488 | mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr) | |
489 | { | |
e6278d92 | 490 | struct ieee802154_hdr hdr; |
32bad7e3 | 491 | |
e6278d92 PB |
492 | if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) { |
493 | pr_debug("malformed packet\n"); | |
494 | return 0; | |
32bad7e3 | 495 | } |
496 | ||
838b83d6 | 497 | if (hdr.source.mode == IEEE802154_ADDR_LONG) { |
c2d5ecfa | 498 | ieee802154_le64_to_be64(haddr, &hdr.source.extended_addr); |
838b83d6 AA |
499 | return IEEE802154_EXTENDED_ADDR_LEN; |
500 | } | |
501 | ||
502 | return 0; | |
32bad7e3 | 503 | } |
504 | ||
838b83d6 AA |
505 | static const struct header_ops mac802154_header_ops = { |
506 | .create = mac802154_header_create, | |
507 | .parse = mac802154_header_parse, | |
32bad7e3 | 508 | }; |
509 | ||
510 | static const struct net_device_ops mac802154_wpan_ops = { | |
e462ded6 | 511 | .ndo_open = mac802154_wpan_open, |
32bad7e3 | 512 | .ndo_stop = mac802154_slave_close, |
e5e584fc | 513 | .ndo_start_xmit = ieee802154_subif_start_xmit, |
32bad7e3 | 514 | .ndo_do_ioctl = mac802154_wpan_ioctl, |
515 | .ndo_set_mac_address = mac802154_wpan_mac_addr, | |
516 | }; | |
517 | ||
b9ff77e5 | 518 | static const struct net_device_ops mac802154_monitor_ops = { |
38130c31 | 519 | .ndo_open = mac802154_wpan_open, |
b9ff77e5 AA |
520 | .ndo_stop = mac802154_slave_close, |
521 | .ndo_start_xmit = ieee802154_monitor_start_xmit, | |
522 | }; | |
523 | ||
f30be4d5 PB |
524 | static void mac802154_wpan_free(struct net_device *dev) |
525 | { | |
59d19cd7 | 526 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
f30be4d5 | 527 | |
036562f9 | 528 | mac802154_llsec_destroy(&sdata->sec); |
f30be4d5 PB |
529 | |
530 | free_netdev(dev); | |
531 | } | |
532 | ||
d5ae67ba | 533 | static void ieee802154_if_setup(struct net_device *dev) |
32bad7e3 | 534 | { |
e57a8946 AA |
535 | dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN; |
536 | memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN); | |
32bad7e3 | 537 | |
87a93e4e AA |
538 | /* Let hard_header_len set to IEEE802154_MIN_HEADER_LEN. AF_PACKET |
539 | * will not send frames without any payload, but ack frames | |
540 | * has no payload, so substract one that we can send a 3 bytes | |
541 | * frame. The xmit callback assumes at least a hard header where two | |
542 | * bytes fc and sequence field are set. | |
543 | */ | |
544 | dev->hard_header_len = IEEE802154_MIN_HEADER_LEN - 1; | |
545 | /* The auth_tag header is for security and places in private payload | |
546 | * room of mac frame which stucks between payload and FCS field. | |
547 | */ | |
548 | dev->needed_tailroom = IEEE802154_MAX_AUTH_TAG_LEN + | |
549 | IEEE802154_FCS_LEN; | |
b40988c4 AA |
550 | /* The mtu size is the payload without mac header in this case. |
551 | * We have a dynamic length header with a minimum header length | |
552 | * which is hard_header_len. In this case we let mtu to the size | |
553 | * of maximum payload which is IEEE802154_MTU - IEEE802154_FCS_LEN - | |
554 | * hard_header_len. The FCS which is set by hardware or ndo_start_xmit | |
555 | * and the minimum mac header which can be evaluated inside driver | |
556 | * layer. The rest of mac header will be part of payload if greater | |
557 | * than hard_header_len. | |
558 | */ | |
559 | dev->mtu = IEEE802154_MTU - IEEE802154_FCS_LEN - | |
560 | dev->hard_header_len; | |
e937f583 | 561 | dev->tx_queue_len = 300; |
32bad7e3 | 562 | dev->flags = IFF_NOARP | IFF_BROADCAST; |
d5ae67ba | 563 | } |
32bad7e3 | 564 | |
d5ae67ba | 565 | static int |
944742a3 AA |
566 | ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata, |
567 | enum nl802154_iftype type) | |
d5ae67ba | 568 | { |
863e88f2 | 569 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
d77b4852 | 570 | int ret; |
344f8c11 | 571 | u8 tmp; |
863e88f2 | 572 | |
d5ae67ba | 573 | /* set some type-dependent values */ |
190ac1ca | 574 | sdata->wpan_dev.iftype = type; |
32bad7e3 | 575 | |
344f8c11 AA |
576 | get_random_bytes(&tmp, sizeof(tmp)); |
577 | atomic_set(&wpan_dev->bsn, tmp); | |
578 | get_random_bytes(&tmp, sizeof(tmp)); | |
579 | atomic_set(&wpan_dev->dsn, tmp); | |
32bad7e3 | 580 | |
e462ded6 | 581 | /* defaults per 802.15.4-2011 */ |
5fb3f026 AA |
582 | wpan_dev->min_be = 3; |
583 | wpan_dev->max_be = 5; | |
584 | wpan_dev->csma_retries = 4; | |
89c7d788 | 585 | wpan_dev->frame_retries = 3; |
e462ded6 | 586 | |
863e88f2 AA |
587 | wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST); |
588 | wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST); | |
f30be4d5 | 589 | |
d5ae67ba | 590 | switch (type) { |
944742a3 | 591 | case NL802154_IFTYPE_NODE: |
b03c9ccc AA |
592 | ieee802154_be64_to_le64(&wpan_dev->extended_addr, |
593 | sdata->dev->dev_addr); | |
594 | ||
d5ae67ba AA |
595 | sdata->dev->header_ops = &mac802154_header_ops; |
596 | sdata->dev->destructor = mac802154_wpan_free; | |
597 | sdata->dev->netdev_ops = &mac802154_wpan_ops; | |
598 | sdata->dev->ml_priv = &mac802154_mlme_wpan; | |
863e88f2 | 599 | wpan_dev->promiscuous_mode = false; |
838b83d6 | 600 | wpan_dev->header_ops = &ieee802154_header_ops; |
986a8abf | 601 | |
d5ae67ba | 602 | mutex_init(&sdata->sec_mtx); |
986a8abf | 603 | |
d5ae67ba | 604 | mac802154_llsec_init(&sdata->sec); |
d77b4852 AA |
605 | ret = mac802154_wpan_update_llsec(sdata->dev); |
606 | if (ret < 0) | |
607 | return ret; | |
608 | ||
d5ae67ba | 609 | break; |
944742a3 | 610 | case NL802154_IFTYPE_MONITOR: |
d5ae67ba AA |
611 | sdata->dev->destructor = free_netdev; |
612 | sdata->dev->netdev_ops = &mac802154_monitor_ops; | |
863e88f2 | 613 | wpan_dev->promiscuous_mode = true; |
d5ae67ba AA |
614 | break; |
615 | default: | |
616 | BUG(); | |
617 | } | |
986a8abf AA |
618 | |
619 | return 0; | |
620 | } | |
621 | ||
622 | struct net_device * | |
623 | ieee802154_if_add(struct ieee802154_local *local, const char *name, | |
5b4a1039 VB |
624 | unsigned char name_assign_type, enum nl802154_iftype type, |
625 | __le64 extended_addr) | |
986a8abf | 626 | { |
d5ae67ba AA |
627 | struct net_device *ndev = NULL; |
628 | struct ieee802154_sub_if_data *sdata = NULL; | |
629 | int ret = -ENOMEM; | |
630 | ||
631 | ASSERT_RTNL(); | |
632 | ||
ed65963b | 633 | ndev = alloc_netdev(sizeof(*sdata), name, |
5b4a1039 | 634 | name_assign_type, ieee802154_if_setup); |
d5ae67ba AA |
635 | if (!ndev) |
636 | return ERR_PTR(-ENOMEM); | |
637 | ||
87a93e4e AA |
638 | ndev->needed_headroom = local->hw.extra_tx_headroom + |
639 | IEEE802154_MAX_HEADER_LEN; | |
d5ae67ba AA |
640 | |
641 | ret = dev_alloc_name(ndev, ndev->name); | |
642 | if (ret < 0) | |
643 | goto err; | |
986a8abf | 644 | |
0e57547e AA |
645 | ieee802154_le64_to_be64(ndev->perm_addr, |
646 | &local->hw.phy->perm_extended_addr); | |
986a8abf | 647 | switch (type) { |
944742a3 | 648 | case NL802154_IFTYPE_NODE: |
d5ae67ba | 649 | ndev->type = ARPHRD_IEEE802154; |
daf4e2c8 | 650 | if (ieee802154_is_valid_extended_unicast_addr(extended_addr)) |
0e57547e AA |
651 | ieee802154_le64_to_be64(ndev->dev_addr, &extended_addr); |
652 | else | |
653 | memcpy(ndev->dev_addr, ndev->perm_addr, | |
654 | IEEE802154_EXTENDED_ADDR_LEN); | |
986a8abf | 655 | break; |
944742a3 | 656 | case NL802154_IFTYPE_MONITOR: |
d5ae67ba | 657 | ndev->type = ARPHRD_IEEE802154_MONITOR; |
986a8abf | 658 | break; |
d5ae67ba AA |
659 | default: |
660 | ret = -EINVAL; | |
661 | goto err; | |
986a8abf | 662 | } |
d5ae67ba AA |
663 | |
664 | /* TODO check this */ | |
665 | SET_NETDEV_DEV(ndev, &local->phy->dev); | |
abbcc341 | 666 | dev_net_set(ndev, wpan_phy_net(local->hw.phy)); |
d5ae67ba AA |
667 | sdata = netdev_priv(ndev); |
668 | ndev->ieee802154_ptr = &sdata->wpan_dev; | |
669 | memcpy(sdata->name, ndev->name, IFNAMSIZ); | |
670 | sdata->dev = ndev; | |
671 | sdata->wpan_dev.wpan_phy = local->hw.phy; | |
672 | sdata->local = local; | |
673 | ||
674 | /* setup type-dependent data */ | |
675 | ret = ieee802154_setup_sdata(sdata, type); | |
676 | if (ret) | |
986a8abf AA |
677 | goto err; |
678 | ||
473f3766 VB |
679 | ret = register_netdevice(ndev); |
680 | if (ret < 0) | |
681 | goto err; | |
d5ae67ba AA |
682 | |
683 | mutex_lock(&local->iflist_mtx); | |
684 | list_add_tail_rcu(&sdata->list, &local->interfaces); | |
685 | mutex_unlock(&local->iflist_mtx); | |
986a8abf | 686 | |
d5ae67ba | 687 | return ndev; |
986a8abf | 688 | |
986a8abf | 689 | err: |
d5ae67ba AA |
690 | free_netdev(ndev); |
691 | return ERR_PTR(ret); | |
986a8abf AA |
692 | } |
693 | ||
b210b187 AA |
694 | void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata) |
695 | { | |
696 | ASSERT_RTNL(); | |
697 | ||
698 | mutex_lock(&sdata->local->iflist_mtx); | |
699 | list_del_rcu(&sdata->list); | |
700 | mutex_unlock(&sdata->local->iflist_mtx); | |
701 | ||
702 | synchronize_rcu(); | |
703 | unregister_netdevice(sdata->dev); | |
704 | } | |
592dfbfc AA |
705 | |
706 | void ieee802154_remove_interfaces(struct ieee802154_local *local) | |
707 | { | |
d14e1c71 | 708 | struct ieee802154_sub_if_data *sdata, *tmp; |
592dfbfc | 709 | |
2789e629 | 710 | mutex_lock(&local->iflist_mtx); |
d14e1c71 | 711 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
592dfbfc | 712 | list_del(&sdata->list); |
592dfbfc AA |
713 | |
714 | unregister_netdevice(sdata->dev); | |
715 | } | |
2789e629 | 716 | mutex_unlock(&local->iflist_mtx); |
592dfbfc | 717 | } |
be4fd8e5 AA |
718 | |
719 | static int netdev_notify(struct notifier_block *nb, | |
720 | unsigned long state, void *ptr) | |
721 | { | |
722 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
723 | struct ieee802154_sub_if_data *sdata; | |
724 | ||
725 | if (state != NETDEV_CHANGENAME) | |
726 | return NOTIFY_DONE; | |
727 | ||
728 | if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy) | |
729 | return NOTIFY_DONE; | |
730 | ||
731 | if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid) | |
732 | return NOTIFY_DONE; | |
733 | ||
734 | sdata = IEEE802154_DEV_TO_SUB_IF(dev); | |
735 | memcpy(sdata->name, dev->name, IFNAMSIZ); | |
736 | ||
737 | return NOTIFY_OK; | |
738 | } | |
739 | ||
740 | static struct notifier_block mac802154_netdev_notifier = { | |
741 | .notifier_call = netdev_notify, | |
742 | }; | |
743 | ||
744 | int ieee802154_iface_init(void) | |
745 | { | |
746 | return register_netdevice_notifier(&mac802154_netdev_notifier); | |
747 | } | |
748 | ||
749 | void ieee802154_iface_exit(void) | |
750 | { | |
751 | unregister_netdevice_notifier(&mac802154_netdev_notifier); | |
752 | } |