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1802d0be | 1 | // SPDX-License-Identifier: GPL-2.0-only |
32bad7e3 | 2 | /* |
3 | * Copyright 2007-2012 Siemens AG | |
4 | * | |
32bad7e3 | 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> | |
4ca24aca | 15 | #include <linux/ieee802154.h> |
32bad7e3 | 16 | |
944742a3 | 17 | #include <net/nl802154.h> |
32bad7e3 | 18 | #include <net/mac802154.h> |
19 | #include <net/ieee802154_netdev.h> | |
5ad60d36 | 20 | #include <net/cfg802154.h> |
32bad7e3 | 21 | |
0f1556bc | 22 | #include "ieee802154_i.h" |
59cb300f | 23 | #include "driver-ops.h" |
32bad7e3 | 24 | |
d77b4852 | 25 | int mac802154_wpan_update_llsec(struct net_device *dev) |
9b0bb4a8 | 26 | { |
59d19cd7 | 27 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
9b0bb4a8 | 28 | struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev); |
863e88f2 | 29 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
9b0bb4a8 PB |
30 | int rc = 0; |
31 | ||
32 | if (ops->llsec) { | |
33 | struct ieee802154_llsec_params params; | |
34 | int changed = 0; | |
35 | ||
863e88f2 | 36 | params.pan_id = wpan_dev->pan_id; |
9b0bb4a8 PB |
37 | changed |= IEEE802154_LLSEC_PARAM_PAN_ID; |
38 | ||
863e88f2 | 39 | params.hwaddr = wpan_dev->extended_addr; |
9b0bb4a8 PB |
40 | changed |= IEEE802154_LLSEC_PARAM_HWADDR; |
41 | ||
42 | rc = ops->llsec->set_params(dev, ¶ms, changed); | |
43 | } | |
44 | ||
45 | return rc; | |
46 | } | |
47 | ||
32bad7e3 | 48 | static int |
49 | mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
50 | { | |
59d19cd7 | 51 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
863e88f2 | 52 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
32bad7e3 | 53 | struct sockaddr_ieee802154 *sa = |
54 | (struct sockaddr_ieee802154 *)&ifr->ifr_addr; | |
55 | int err = -ENOIOCTLCMD; | |
56 | ||
e34fd879 LB |
57 | if (cmd != SIOCGIFADDR && cmd != SIOCSIFADDR) |
58 | return err; | |
59 | ||
4a669f7d | 60 | rtnl_lock(); |
32bad7e3 | 61 | |
62 | switch (cmd) { | |
63 | case SIOCGIFADDR: | |
b70ab2e8 PB |
64 | { |
65 | u16 pan_id, short_addr; | |
66 | ||
863e88f2 AA |
67 | pan_id = le16_to_cpu(wpan_dev->pan_id); |
68 | short_addr = le16_to_cpu(wpan_dev->short_addr); | |
b70ab2e8 PB |
69 | if (pan_id == IEEE802154_PANID_BROADCAST || |
70 | short_addr == IEEE802154_ADDR_BROADCAST) { | |
32bad7e3 | 71 | err = -EADDRNOTAVAIL; |
72 | break; | |
73 | } | |
74 | ||
75 | sa->family = AF_IEEE802154; | |
76 | sa->addr.addr_type = IEEE802154_ADDR_SHORT; | |
b70ab2e8 PB |
77 | sa->addr.pan_id = pan_id; |
78 | sa->addr.short_addr = short_addr; | |
32bad7e3 | 79 | |
80 | err = 0; | |
81 | break; | |
b70ab2e8 | 82 | } |
32bad7e3 | 83 | case SIOCSIFADDR: |
f7cb96f1 | 84 | if (netif_running(dev)) { |
4a669f7d | 85 | rtnl_unlock(); |
f7cb96f1 AA |
86 | return -EBUSY; |
87 | } | |
88 | ||
32bad7e3 | 89 | dev_warn(&dev->dev, |
9b13494c | 90 | "Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n"); |
32bad7e3 | 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 | ||
863e88f2 AA |
100 | wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id); |
101 | wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr); | |
32bad7e3 | 102 | |
9b0bb4a8 | 103 | err = mac802154_wpan_update_llsec(dev); |
32bad7e3 | 104 | break; |
105 | } | |
106 | ||
4a669f7d | 107 | rtnl_unlock(); |
32bad7e3 | 108 | return err; |
109 | } | |
110 | ||
111 | static int mac802154_wpan_mac_addr(struct net_device *dev, void *p) | |
112 | { | |
776e59de | 113 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
32bad7e3 | 114 | struct sockaddr *addr = p; |
ea7053c1 | 115 | __le64 extended_addr; |
32bad7e3 | 116 | |
117 | if (netif_running(dev)) | |
118 | return -EBUSY; | |
119 | ||
09095fdc AA |
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 | ||
705cbbbe | 128 | ieee802154_be64_to_le64(&extended_addr, addr->sa_data); |
daf4e2c8 | 129 | if (!ieee802154_is_valid_extended_unicast_addr(extended_addr)) |
ea7053c1 AA |
130 | return -EINVAL; |
131 | ||
32bad7e3 | 132 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); |
863e88f2 | 133 | sdata->wpan_dev.extended_addr = extended_addr; |
776e59de | 134 | |
09095fdc AA |
135 | /* update lowpan interface mac address when |
136 | * wpan mac has been changed | |
137 | */ | |
138 | if (sdata->wpan_dev.lowpan_dev) | |
139 | memcpy(sdata->wpan_dev.lowpan_dev->dev_addr, dev->dev_addr, | |
140 | dev->addr_len); | |
141 | ||
9b0bb4a8 | 142 | return mac802154_wpan_update_llsec(dev); |
32bad7e3 | 143 | } |
144 | ||
95c0aa15 AA |
145 | static int ieee802154_setup_hw(struct ieee802154_sub_if_data *sdata) |
146 | { | |
147 | struct ieee802154_local *local = sdata->local; | |
148 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; | |
149 | int ret; | |
150 | ||
151 | if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) { | |
152 | ret = drv_set_promiscuous_mode(local, | |
153 | wpan_dev->promiscuous_mode); | |
154 | if (ret < 0) | |
155 | return ret; | |
156 | } | |
157 | ||
158 | if (local->hw.flags & IEEE802154_HW_AFILT) { | |
159 | ret = drv_set_pan_id(local, wpan_dev->pan_id); | |
160 | if (ret < 0) | |
161 | return ret; | |
162 | ||
163 | ret = drv_set_extended_addr(local, wpan_dev->extended_addr); | |
164 | if (ret < 0) | |
165 | return ret; | |
166 | ||
167 | ret = drv_set_short_addr(local, wpan_dev->short_addr); | |
168 | if (ret < 0) | |
169 | return ret; | |
170 | } | |
171 | ||
172 | if (local->hw.flags & IEEE802154_HW_LBT) { | |
173 | ret = drv_set_lbt_mode(local, wpan_dev->lbt); | |
174 | if (ret < 0) | |
175 | return ret; | |
176 | } | |
177 | ||
178 | if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) { | |
179 | ret = drv_set_csma_params(local, wpan_dev->min_be, | |
180 | wpan_dev->max_be, | |
181 | wpan_dev->csma_retries); | |
182 | if (ret < 0) | |
183 | return ret; | |
184 | } | |
185 | ||
186 | if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) { | |
187 | ret = drv_set_max_frame_retries(local, wpan_dev->frame_retries); | |
188 | if (ret < 0) | |
189 | return ret; | |
190 | } | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
19ec690a AA |
195 | static int mac802154_slave_open(struct net_device *dev) |
196 | { | |
197 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); | |
19ec690a | 198 | struct ieee802154_local *local = sdata->local; |
5c698e8b | 199 | int res; |
19ec690a AA |
200 | |
201 | ASSERT_RTNL(); | |
202 | ||
0ea3da64 | 203 | set_bit(SDATA_STATE_RUNNING, &sdata->state); |
19ec690a | 204 | |
74457641 | 205 | if (!local->open_count) { |
95c0aa15 AA |
206 | res = ieee802154_setup_hw(sdata); |
207 | if (res) | |
208 | goto err; | |
209 | ||
59cb300f | 210 | res = drv_start(local); |
19ec690a AA |
211 | if (res) |
212 | goto err; | |
213 | } | |
214 | ||
74457641 | 215 | local->open_count++; |
19ec690a AA |
216 | netif_start_queue(dev); |
217 | return 0; | |
218 | err: | |
0ea3da64 AA |
219 | /* might already be clear but that doesn't matter */ |
220 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); | |
19ec690a AA |
221 | |
222 | return res; | |
223 | } | |
224 | ||
bd37a78d AA |
225 | static int |
226 | ieee802154_check_mac_settings(struct ieee802154_local *local, | |
227 | struct wpan_dev *wpan_dev, | |
228 | struct wpan_dev *nwpan_dev) | |
229 | { | |
230 | ASSERT_RTNL(); | |
231 | ||
232 | if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) { | |
233 | if (wpan_dev->promiscuous_mode != nwpan_dev->promiscuous_mode) | |
234 | return -EBUSY; | |
235 | } | |
236 | ||
237 | if (local->hw.flags & IEEE802154_HW_AFILT) { | |
8bf9538a AA |
238 | if (wpan_dev->pan_id != nwpan_dev->pan_id || |
239 | wpan_dev->short_addr != nwpan_dev->short_addr || | |
240 | wpan_dev->extended_addr != nwpan_dev->extended_addr) | |
bd37a78d AA |
241 | return -EBUSY; |
242 | } | |
243 | ||
244 | if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) { | |
8bf9538a AA |
245 | if (wpan_dev->min_be != nwpan_dev->min_be || |
246 | wpan_dev->max_be != nwpan_dev->max_be || | |
247 | wpan_dev->csma_retries != nwpan_dev->csma_retries) | |
bd37a78d AA |
248 | return -EBUSY; |
249 | } | |
250 | ||
251 | if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) { | |
252 | if (wpan_dev->frame_retries != nwpan_dev->frame_retries) | |
253 | return -EBUSY; | |
254 | } | |
255 | ||
256 | if (local->hw.flags & IEEE802154_HW_LBT) { | |
257 | if (wpan_dev->lbt != nwpan_dev->lbt) | |
258 | return -EBUSY; | |
259 | } | |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
264 | static int | |
265 | ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata, | |
266 | enum nl802154_iftype iftype) | |
267 | { | |
268 | struct ieee802154_local *local = sdata->local; | |
269 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; | |
270 | struct ieee802154_sub_if_data *nsdata; | |
271 | ||
272 | /* we hold the RTNL here so can safely walk the list */ | |
273 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
274 | if (nsdata != sdata && ieee802154_sdata_running(nsdata)) { | |
275 | int ret; | |
276 | ||
cd1c5665 AA |
277 | /* TODO currently we don't support multiple node types |
278 | * we need to run skb_clone at rx path. Check if there | |
279 | * exist really an use case if we need to support | |
280 | * multiple node types at the same time. | |
281 | */ | |
ed65963b AA |
282 | if (wpan_dev->iftype == NL802154_IFTYPE_NODE && |
283 | nsdata->wpan_dev.iftype == NL802154_IFTYPE_NODE) | |
cd1c5665 AA |
284 | return -EBUSY; |
285 | ||
bd37a78d AA |
286 | /* check all phy mac sublayer settings are the same. |
287 | * We have only one phy, different values makes trouble. | |
288 | */ | |
289 | ret = ieee802154_check_mac_settings(local, wpan_dev, | |
290 | &nsdata->wpan_dev); | |
291 | if (ret < 0) | |
292 | return ret; | |
293 | } | |
294 | } | |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
6ef0023a | 299 | static int mac802154_wpan_open(struct net_device *dev) |
e462ded6 PB |
300 | { |
301 | int rc; | |
59d19cd7 | 302 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
863e88f2 | 303 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
e462ded6 | 304 | |
ed65963b | 305 | rc = ieee802154_check_concurrent_iface(sdata, wpan_dev->iftype); |
bd37a78d AA |
306 | if (rc < 0) |
307 | return rc; | |
308 | ||
95c0aa15 | 309 | return mac802154_slave_open(dev); |
e462ded6 PB |
310 | } |
311 | ||
19ec690a AA |
312 | static int mac802154_slave_close(struct net_device *dev) |
313 | { | |
314 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); | |
315 | struct ieee802154_local *local = sdata->local; | |
316 | ||
317 | ASSERT_RTNL(); | |
318 | ||
319 | netif_stop_queue(dev); | |
74457641 | 320 | local->open_count--; |
19ec690a | 321 | |
0ea3da64 | 322 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
19ec690a | 323 | |
c4227c8a AA |
324 | if (!local->open_count) |
325 | ieee802154_stop_device(local); | |
19ec690a AA |
326 | |
327 | return 0; | |
328 | } | |
329 | ||
036562f9 | 330 | static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata, |
f30be4d5 PB |
331 | struct ieee802154_hdr *hdr, |
332 | const struct ieee802154_mac_cb *cb) | |
333 | { | |
334 | struct ieee802154_llsec_params params; | |
335 | u8 level; | |
336 | ||
036562f9 | 337 | mac802154_llsec_get_params(&sdata->sec, ¶ms); |
f30be4d5 PB |
338 | |
339 | if (!params.enabled && cb->secen_override && cb->secen) | |
340 | return -EINVAL; | |
341 | if (!params.enabled || | |
342 | (cb->secen_override && !cb->secen) || | |
343 | !params.out_level) | |
344 | return 0; | |
345 | if (cb->seclevel_override && !cb->seclevel) | |
346 | return -EINVAL; | |
347 | ||
348 | level = cb->seclevel_override ? cb->seclevel : params.out_level; | |
349 | ||
350 | hdr->fc.security_enabled = 1; | |
351 | hdr->sec.level = level; | |
352 | hdr->sec.key_id_mode = params.out_key.mode; | |
353 | if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX) | |
354 | hdr->sec.short_src = params.out_key.short_source; | |
355 | else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX) | |
356 | hdr->sec.extended_src = params.out_key.extended_source; | |
357 | hdr->sec.key_id = params.out_key.id; | |
358 | ||
359 | return 0; | |
360 | } | |
361 | ||
838b83d6 AA |
362 | static int ieee802154_header_create(struct sk_buff *skb, |
363 | struct net_device *dev, | |
364 | const struct ieee802154_addr *daddr, | |
365 | const struct ieee802154_addr *saddr, | |
366 | unsigned len) | |
32bad7e3 | 367 | { |
e6278d92 | 368 | struct ieee802154_hdr hdr; |
59d19cd7 | 369 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
863e88f2 | 370 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
32edc40a | 371 | struct ieee802154_mac_cb *cb = mac_cb(skb); |
e6278d92 | 372 | int hlen; |
32bad7e3 | 373 | |
374 | if (!daddr) | |
375 | return -EINVAL; | |
376 | ||
e6278d92 | 377 | memset(&hdr.fc, 0, sizeof(hdr.fc)); |
32edc40a PB |
378 | hdr.fc.type = cb->type; |
379 | hdr.fc.security_enabled = cb->secen; | |
380 | hdr.fc.ack_request = cb->ackreq; | |
344f8c11 | 381 | hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF; |
32bad7e3 | 382 | |
036562f9 | 383 | if (mac802154_set_header_security(sdata, &hdr, cb) < 0) |
f30be4d5 PB |
384 | return -EINVAL; |
385 | ||
32bad7e3 | 386 | if (!saddr) { |
863e88f2 AA |
387 | if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) || |
388 | wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) || | |
389 | wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) { | |
e6278d92 | 390 | hdr.source.mode = IEEE802154_ADDR_LONG; |
863e88f2 | 391 | hdr.source.extended_addr = wpan_dev->extended_addr; |
32bad7e3 | 392 | } else { |
e6278d92 | 393 | hdr.source.mode = IEEE802154_ADDR_SHORT; |
863e88f2 | 394 | hdr.source.short_addr = wpan_dev->short_addr; |
32bad7e3 | 395 | } |
396 | ||
863e88f2 | 397 | hdr.source.pan_id = wpan_dev->pan_id; |
e6278d92 PB |
398 | } else { |
399 | hdr.source = *(const struct ieee802154_addr *)saddr; | |
32bad7e3 | 400 | } |
401 | ||
e6278d92 | 402 | hdr.dest = *(const struct ieee802154_addr *)daddr; |
32bad7e3 | 403 | |
e6278d92 PB |
404 | hlen = ieee802154_hdr_push(skb, &hdr); |
405 | if (hlen < 0) | |
406 | return -EINVAL; | |
32bad7e3 | 407 | |
3e69162e | 408 | skb_reset_mac_header(skb); |
e6278d92 | 409 | skb->mac_len = hlen; |
32bad7e3 | 410 | |
8c84296f | 411 | if (len > ieee802154_max_payload(&hdr)) |
d1d7358e PB |
412 | return -EMSGSIZE; |
413 | ||
e6278d92 | 414 | return hlen; |
32bad7e3 | 415 | } |
416 | ||
838b83d6 AA |
417 | static const struct wpan_dev_header_ops ieee802154_header_ops = { |
418 | .create = ieee802154_header_create, | |
419 | }; | |
420 | ||
421 | /* This header create functionality assumes a 8 byte array for | |
422 | * source and destination pointer at maximum. To adapt this for | |
423 | * the 802.15.4 dataframe header we use extended address handling | |
424 | * here only and intra pan connection. fc fields are mostly fallback | |
425 | * handling. For provide dev_hard_header for dgram sockets. | |
426 | */ | |
427 | static int mac802154_header_create(struct sk_buff *skb, | |
428 | struct net_device *dev, | |
429 | unsigned short type, | |
430 | const void *daddr, | |
431 | const void *saddr, | |
432 | unsigned len) | |
433 | { | |
434 | struct ieee802154_hdr hdr; | |
435 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); | |
436 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; | |
437 | struct ieee802154_mac_cb cb = { }; | |
438 | int hlen; | |
439 | ||
440 | if (!daddr) | |
441 | return -EINVAL; | |
442 | ||
443 | memset(&hdr.fc, 0, sizeof(hdr.fc)); | |
444 | hdr.fc.type = IEEE802154_FC_TYPE_DATA; | |
445 | hdr.fc.ack_request = wpan_dev->ackreq; | |
446 | hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF; | |
447 | ||
448 | /* TODO currently a workaround to give zero cb block to set | |
449 | * security parameters defaults according MIB. | |
450 | */ | |
451 | if (mac802154_set_header_security(sdata, &hdr, &cb) < 0) | |
452 | return -EINVAL; | |
453 | ||
454 | hdr.dest.pan_id = wpan_dev->pan_id; | |
455 | hdr.dest.mode = IEEE802154_ADDR_LONG; | |
c2d5ecfa | 456 | ieee802154_be64_to_le64(&hdr.dest.extended_addr, daddr); |
838b83d6 AA |
457 | |
458 | hdr.source.pan_id = hdr.dest.pan_id; | |
459 | hdr.source.mode = IEEE802154_ADDR_LONG; | |
460 | ||
461 | if (!saddr) | |
462 | hdr.source.extended_addr = wpan_dev->extended_addr; | |
463 | else | |
c2d5ecfa | 464 | ieee802154_be64_to_le64(&hdr.source.extended_addr, saddr); |
838b83d6 AA |
465 | |
466 | hlen = ieee802154_hdr_push(skb, &hdr); | |
467 | if (hlen < 0) | |
468 | return -EINVAL; | |
469 | ||
470 | skb_reset_mac_header(skb); | |
471 | skb->mac_len = hlen; | |
472 | ||
473 | if (len > ieee802154_max_payload(&hdr)) | |
474 | return -EMSGSIZE; | |
475 | ||
476 | return hlen; | |
477 | } | |
478 | ||
32bad7e3 | 479 | static int |
480 | mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr) | |
481 | { | |
e6278d92 | 482 | struct ieee802154_hdr hdr; |
32bad7e3 | 483 | |
e6278d92 PB |
484 | if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) { |
485 | pr_debug("malformed packet\n"); | |
486 | return 0; | |
32bad7e3 | 487 | } |
488 | ||
838b83d6 | 489 | if (hdr.source.mode == IEEE802154_ADDR_LONG) { |
c2d5ecfa | 490 | ieee802154_le64_to_be64(haddr, &hdr.source.extended_addr); |
838b83d6 AA |
491 | return IEEE802154_EXTENDED_ADDR_LEN; |
492 | } | |
493 | ||
494 | return 0; | |
32bad7e3 | 495 | } |
496 | ||
838b83d6 AA |
497 | static const struct header_ops mac802154_header_ops = { |
498 | .create = mac802154_header_create, | |
499 | .parse = mac802154_header_parse, | |
32bad7e3 | 500 | }; |
501 | ||
502 | static const struct net_device_ops mac802154_wpan_ops = { | |
e462ded6 | 503 | .ndo_open = mac802154_wpan_open, |
32bad7e3 | 504 | .ndo_stop = mac802154_slave_close, |
e5e584fc | 505 | .ndo_start_xmit = ieee802154_subif_start_xmit, |
32bad7e3 | 506 | .ndo_do_ioctl = mac802154_wpan_ioctl, |
507 | .ndo_set_mac_address = mac802154_wpan_mac_addr, | |
508 | }; | |
509 | ||
b9ff77e5 | 510 | static const struct net_device_ops mac802154_monitor_ops = { |
38130c31 | 511 | .ndo_open = mac802154_wpan_open, |
b9ff77e5 AA |
512 | .ndo_stop = mac802154_slave_close, |
513 | .ndo_start_xmit = ieee802154_monitor_start_xmit, | |
514 | }; | |
515 | ||
f30be4d5 PB |
516 | static void mac802154_wpan_free(struct net_device *dev) |
517 | { | |
59d19cd7 | 518 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
f30be4d5 | 519 | |
036562f9 | 520 | mac802154_llsec_destroy(&sdata->sec); |
f30be4d5 PB |
521 | } |
522 | ||
d5ae67ba | 523 | static void ieee802154_if_setup(struct net_device *dev) |
32bad7e3 | 524 | { |
e57a8946 AA |
525 | dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN; |
526 | memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN); | |
32bad7e3 | 527 | |
87a93e4e AA |
528 | /* Let hard_header_len set to IEEE802154_MIN_HEADER_LEN. AF_PACKET |
529 | * will not send frames without any payload, but ack frames | |
530 | * has no payload, so substract one that we can send a 3 bytes | |
531 | * frame. The xmit callback assumes at least a hard header where two | |
532 | * bytes fc and sequence field are set. | |
533 | */ | |
534 | dev->hard_header_len = IEEE802154_MIN_HEADER_LEN - 1; | |
535 | /* The auth_tag header is for security and places in private payload | |
536 | * room of mac frame which stucks between payload and FCS field. | |
537 | */ | |
538 | dev->needed_tailroom = IEEE802154_MAX_AUTH_TAG_LEN + | |
539 | IEEE802154_FCS_LEN; | |
b40988c4 AA |
540 | /* The mtu size is the payload without mac header in this case. |
541 | * We have a dynamic length header with a minimum header length | |
542 | * which is hard_header_len. In this case we let mtu to the size | |
543 | * of maximum payload which is IEEE802154_MTU - IEEE802154_FCS_LEN - | |
544 | * hard_header_len. The FCS which is set by hardware or ndo_start_xmit | |
545 | * and the minimum mac header which can be evaluated inside driver | |
546 | * layer. The rest of mac header will be part of payload if greater | |
547 | * than hard_header_len. | |
548 | */ | |
549 | dev->mtu = IEEE802154_MTU - IEEE802154_FCS_LEN - | |
550 | dev->hard_header_len; | |
e937f583 | 551 | dev->tx_queue_len = 300; |
32bad7e3 | 552 | dev->flags = IFF_NOARP | IFF_BROADCAST; |
d5ae67ba | 553 | } |
32bad7e3 | 554 | |
d5ae67ba | 555 | static int |
944742a3 AA |
556 | ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata, |
557 | enum nl802154_iftype type) | |
d5ae67ba | 558 | { |
863e88f2 | 559 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
d77b4852 | 560 | int ret; |
344f8c11 | 561 | u8 tmp; |
863e88f2 | 562 | |
d5ae67ba | 563 | /* set some type-dependent values */ |
190ac1ca | 564 | sdata->wpan_dev.iftype = type; |
32bad7e3 | 565 | |
344f8c11 AA |
566 | get_random_bytes(&tmp, sizeof(tmp)); |
567 | atomic_set(&wpan_dev->bsn, tmp); | |
568 | get_random_bytes(&tmp, sizeof(tmp)); | |
569 | atomic_set(&wpan_dev->dsn, tmp); | |
32bad7e3 | 570 | |
e462ded6 | 571 | /* defaults per 802.15.4-2011 */ |
5fb3f026 AA |
572 | wpan_dev->min_be = 3; |
573 | wpan_dev->max_be = 5; | |
574 | wpan_dev->csma_retries = 4; | |
89c7d788 | 575 | wpan_dev->frame_retries = 3; |
e462ded6 | 576 | |
863e88f2 AA |
577 | wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST); |
578 | wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST); | |
f30be4d5 | 579 | |
d5ae67ba | 580 | switch (type) { |
944742a3 | 581 | case NL802154_IFTYPE_NODE: |
b03c9ccc AA |
582 | ieee802154_be64_to_le64(&wpan_dev->extended_addr, |
583 | sdata->dev->dev_addr); | |
584 | ||
d5ae67ba | 585 | sdata->dev->header_ops = &mac802154_header_ops; |
cf124db5 DM |
586 | sdata->dev->needs_free_netdev = true; |
587 | sdata->dev->priv_destructor = mac802154_wpan_free; | |
d5ae67ba AA |
588 | sdata->dev->netdev_ops = &mac802154_wpan_ops; |
589 | sdata->dev->ml_priv = &mac802154_mlme_wpan; | |
863e88f2 | 590 | wpan_dev->promiscuous_mode = false; |
838b83d6 | 591 | wpan_dev->header_ops = &ieee802154_header_ops; |
986a8abf | 592 | |
d5ae67ba | 593 | mutex_init(&sdata->sec_mtx); |
986a8abf | 594 | |
d5ae67ba | 595 | mac802154_llsec_init(&sdata->sec); |
d77b4852 AA |
596 | ret = mac802154_wpan_update_llsec(sdata->dev); |
597 | if (ret < 0) | |
598 | return ret; | |
599 | ||
d5ae67ba | 600 | break; |
944742a3 | 601 | case NL802154_IFTYPE_MONITOR: |
cf124db5 | 602 | sdata->dev->needs_free_netdev = true; |
d5ae67ba | 603 | sdata->dev->netdev_ops = &mac802154_monitor_ops; |
863e88f2 | 604 | wpan_dev->promiscuous_mode = true; |
d5ae67ba AA |
605 | break; |
606 | default: | |
607 | BUG(); | |
608 | } | |
986a8abf AA |
609 | |
610 | return 0; | |
611 | } | |
612 | ||
613 | struct net_device * | |
614 | ieee802154_if_add(struct ieee802154_local *local, const char *name, | |
5b4a1039 VB |
615 | unsigned char name_assign_type, enum nl802154_iftype type, |
616 | __le64 extended_addr) | |
986a8abf | 617 | { |
d5ae67ba AA |
618 | struct net_device *ndev = NULL; |
619 | struct ieee802154_sub_if_data *sdata = NULL; | |
620 | int ret = -ENOMEM; | |
621 | ||
622 | ASSERT_RTNL(); | |
623 | ||
ed65963b | 624 | ndev = alloc_netdev(sizeof(*sdata), name, |
5b4a1039 | 625 | name_assign_type, ieee802154_if_setup); |
d5ae67ba AA |
626 | if (!ndev) |
627 | return ERR_PTR(-ENOMEM); | |
628 | ||
87a93e4e AA |
629 | ndev->needed_headroom = local->hw.extra_tx_headroom + |
630 | IEEE802154_MAX_HEADER_LEN; | |
d5ae67ba AA |
631 | |
632 | ret = dev_alloc_name(ndev, ndev->name); | |
633 | if (ret < 0) | |
634 | goto err; | |
986a8abf | 635 | |
0e57547e AA |
636 | ieee802154_le64_to_be64(ndev->perm_addr, |
637 | &local->hw.phy->perm_extended_addr); | |
986a8abf | 638 | switch (type) { |
944742a3 | 639 | case NL802154_IFTYPE_NODE: |
d5ae67ba | 640 | ndev->type = ARPHRD_IEEE802154; |
daf4e2c8 | 641 | if (ieee802154_is_valid_extended_unicast_addr(extended_addr)) |
0e57547e AA |
642 | ieee802154_le64_to_be64(ndev->dev_addr, &extended_addr); |
643 | else | |
644 | memcpy(ndev->dev_addr, ndev->perm_addr, | |
645 | IEEE802154_EXTENDED_ADDR_LEN); | |
986a8abf | 646 | break; |
944742a3 | 647 | case NL802154_IFTYPE_MONITOR: |
d5ae67ba | 648 | ndev->type = ARPHRD_IEEE802154_MONITOR; |
986a8abf | 649 | break; |
d5ae67ba AA |
650 | default: |
651 | ret = -EINVAL; | |
652 | goto err; | |
986a8abf | 653 | } |
d5ae67ba AA |
654 | |
655 | /* TODO check this */ | |
656 | SET_NETDEV_DEV(ndev, &local->phy->dev); | |
abbcc341 | 657 | dev_net_set(ndev, wpan_phy_net(local->hw.phy)); |
d5ae67ba AA |
658 | sdata = netdev_priv(ndev); |
659 | ndev->ieee802154_ptr = &sdata->wpan_dev; | |
660 | memcpy(sdata->name, ndev->name, IFNAMSIZ); | |
661 | sdata->dev = ndev; | |
662 | sdata->wpan_dev.wpan_phy = local->hw.phy; | |
663 | sdata->local = local; | |
664 | ||
665 | /* setup type-dependent data */ | |
666 | ret = ieee802154_setup_sdata(sdata, type); | |
667 | if (ret) | |
986a8abf AA |
668 | goto err; |
669 | ||
473f3766 VB |
670 | ret = register_netdevice(ndev); |
671 | if (ret < 0) | |
672 | goto err; | |
d5ae67ba AA |
673 | |
674 | mutex_lock(&local->iflist_mtx); | |
675 | list_add_tail_rcu(&sdata->list, &local->interfaces); | |
676 | mutex_unlock(&local->iflist_mtx); | |
986a8abf | 677 | |
d5ae67ba | 678 | return ndev; |
986a8abf | 679 | |
986a8abf | 680 | err: |
d5ae67ba AA |
681 | free_netdev(ndev); |
682 | return ERR_PTR(ret); | |
986a8abf AA |
683 | } |
684 | ||
b210b187 AA |
685 | void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata) |
686 | { | |
687 | ASSERT_RTNL(); | |
688 | ||
689 | mutex_lock(&sdata->local->iflist_mtx); | |
690 | list_del_rcu(&sdata->list); | |
691 | mutex_unlock(&sdata->local->iflist_mtx); | |
692 | ||
693 | synchronize_rcu(); | |
694 | unregister_netdevice(sdata->dev); | |
695 | } | |
592dfbfc AA |
696 | |
697 | void ieee802154_remove_interfaces(struct ieee802154_local *local) | |
698 | { | |
d14e1c71 | 699 | struct ieee802154_sub_if_data *sdata, *tmp; |
592dfbfc | 700 | |
2789e629 | 701 | mutex_lock(&local->iflist_mtx); |
d14e1c71 | 702 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
592dfbfc | 703 | list_del(&sdata->list); |
592dfbfc AA |
704 | |
705 | unregister_netdevice(sdata->dev); | |
706 | } | |
2789e629 | 707 | mutex_unlock(&local->iflist_mtx); |
592dfbfc | 708 | } |
be4fd8e5 AA |
709 | |
710 | static int netdev_notify(struct notifier_block *nb, | |
711 | unsigned long state, void *ptr) | |
712 | { | |
713 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
714 | struct ieee802154_sub_if_data *sdata; | |
715 | ||
716 | if (state != NETDEV_CHANGENAME) | |
717 | return NOTIFY_DONE; | |
718 | ||
719 | if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy) | |
720 | return NOTIFY_DONE; | |
721 | ||
722 | if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid) | |
723 | return NOTIFY_DONE; | |
724 | ||
725 | sdata = IEEE802154_DEV_TO_SUB_IF(dev); | |
726 | memcpy(sdata->name, dev->name, IFNAMSIZ); | |
727 | ||
728 | return NOTIFY_OK; | |
729 | } | |
730 | ||
731 | static struct notifier_block mac802154_netdev_notifier = { | |
732 | .notifier_call = netdev_notify, | |
733 | }; | |
734 | ||
735 | int ieee802154_iface_init(void) | |
736 | { | |
737 | return register_netdevice_notifier(&mac802154_netdev_notifier); | |
738 | } | |
739 | ||
740 | void ieee802154_iface_exit(void) | |
741 | { | |
742 | unregister_netdevice_notifier(&mac802154_netdev_notifier); | |
743 | } |