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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 | ||
659f4e02 | 132 | dev_addr_set(dev, addr->sa_data); |
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) | |
08bb7516 | 139 | dev_addr_set(sdata->wpan_dev.lowpan_dev, dev->dev_addr); |
09095fdc | 140 | |
9b0bb4a8 | 141 | return mac802154_wpan_update_llsec(dev); |
32bad7e3 | 142 | } |
143 | ||
95c0aa15 AA |
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 | ||
ac8037c3 | 150 | sdata->required_filtering = sdata->iface_default_filtering; |
95c0aa15 AA |
151 | |
152 | if (local->hw.flags & IEEE802154_HW_AFILT) { | |
ac8037c3 AA |
153 | local->addr_filt.pan_id = wpan_dev->pan_id; |
154 | local->addr_filt.ieee_addr = wpan_dev->extended_addr; | |
155 | local->addr_filt.short_addr = wpan_dev->short_addr; | |
95c0aa15 AA |
156 | } |
157 | ||
158 | if (local->hw.flags & IEEE802154_HW_LBT) { | |
159 | ret = drv_set_lbt_mode(local, wpan_dev->lbt); | |
160 | if (ret < 0) | |
161 | return ret; | |
162 | } | |
163 | ||
164 | if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) { | |
165 | ret = drv_set_csma_params(local, wpan_dev->min_be, | |
166 | wpan_dev->max_be, | |
167 | wpan_dev->csma_retries); | |
168 | if (ret < 0) | |
169 | return ret; | |
170 | } | |
171 | ||
172 | if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) { | |
173 | ret = drv_set_max_frame_retries(local, wpan_dev->frame_retries); | |
174 | if (ret < 0) | |
175 | return ret; | |
176 | } | |
177 | ||
178 | return 0; | |
179 | } | |
180 | ||
19ec690a AA |
181 | static int mac802154_slave_open(struct net_device *dev) |
182 | { | |
183 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); | |
19ec690a | 184 | struct ieee802154_local *local = sdata->local; |
5c698e8b | 185 | int res; |
19ec690a AA |
186 | |
187 | ASSERT_RTNL(); | |
188 | ||
0ea3da64 | 189 | set_bit(SDATA_STATE_RUNNING, &sdata->state); |
19ec690a | 190 | |
74457641 | 191 | if (!local->open_count) { |
95c0aa15 AA |
192 | res = ieee802154_setup_hw(sdata); |
193 | if (res) | |
194 | goto err; | |
195 | ||
ac8037c3 AA |
196 | res = drv_start(local, sdata->required_filtering, |
197 | &local->addr_filt); | |
19ec690a AA |
198 | if (res) |
199 | goto err; | |
200 | } | |
201 | ||
74457641 | 202 | local->open_count++; |
19ec690a AA |
203 | netif_start_queue(dev); |
204 | return 0; | |
205 | err: | |
0ea3da64 AA |
206 | /* might already be clear but that doesn't matter */ |
207 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); | |
19ec690a AA |
208 | |
209 | return res; | |
210 | } | |
211 | ||
bd37a78d AA |
212 | static int |
213 | ieee802154_check_mac_settings(struct ieee802154_local *local, | |
ac8037c3 AA |
214 | struct ieee802154_sub_if_data *sdata, |
215 | struct ieee802154_sub_if_data *nsdata) | |
bd37a78d | 216 | { |
ac8037c3 AA |
217 | struct wpan_dev *nwpan_dev = &nsdata->wpan_dev; |
218 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; | |
219 | ||
bd37a78d AA |
220 | ASSERT_RTNL(); |
221 | ||
ac8037c3 AA |
222 | if (sdata->iface_default_filtering != nsdata->iface_default_filtering) |
223 | return -EBUSY; | |
bd37a78d AA |
224 | |
225 | if (local->hw.flags & IEEE802154_HW_AFILT) { | |
8bf9538a AA |
226 | if (wpan_dev->pan_id != nwpan_dev->pan_id || |
227 | wpan_dev->short_addr != nwpan_dev->short_addr || | |
228 | wpan_dev->extended_addr != nwpan_dev->extended_addr) | |
bd37a78d AA |
229 | return -EBUSY; |
230 | } | |
231 | ||
232 | if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) { | |
8bf9538a AA |
233 | if (wpan_dev->min_be != nwpan_dev->min_be || |
234 | wpan_dev->max_be != nwpan_dev->max_be || | |
235 | wpan_dev->csma_retries != nwpan_dev->csma_retries) | |
bd37a78d AA |
236 | return -EBUSY; |
237 | } | |
238 | ||
239 | if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) { | |
240 | if (wpan_dev->frame_retries != nwpan_dev->frame_retries) | |
241 | return -EBUSY; | |
242 | } | |
243 | ||
244 | if (local->hw.flags & IEEE802154_HW_LBT) { | |
245 | if (wpan_dev->lbt != nwpan_dev->lbt) | |
246 | return -EBUSY; | |
247 | } | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
252 | static int | |
253 | ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata, | |
254 | enum nl802154_iftype iftype) | |
255 | { | |
256 | struct ieee802154_local *local = sdata->local; | |
bd37a78d AA |
257 | struct ieee802154_sub_if_data *nsdata; |
258 | ||
259 | /* we hold the RTNL here so can safely walk the list */ | |
260 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
261 | if (nsdata != sdata && ieee802154_sdata_running(nsdata)) { | |
262 | int ret; | |
263 | ||
2622e785 MR |
264 | /* TODO currently we don't support multiple node/coord |
265 | * types we need to run skb_clone at rx path. Check if | |
266 | * there exist really an use case if we need to support | |
267 | * multiple node/coord types at the same time. | |
cd1c5665 | 268 | */ |
2622e785 MR |
269 | if (sdata->wpan_dev.iftype != NL802154_IFTYPE_MONITOR && |
270 | nsdata->wpan_dev.iftype != NL802154_IFTYPE_MONITOR) | |
cd1c5665 AA |
271 | return -EBUSY; |
272 | ||
bd37a78d AA |
273 | /* check all phy mac sublayer settings are the same. |
274 | * We have only one phy, different values makes trouble. | |
275 | */ | |
ac8037c3 | 276 | ret = ieee802154_check_mac_settings(local, sdata, nsdata); |
bd37a78d AA |
277 | if (ret < 0) |
278 | return ret; | |
279 | } | |
280 | } | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
6ef0023a | 285 | static int mac802154_wpan_open(struct net_device *dev) |
e462ded6 PB |
286 | { |
287 | int rc; | |
59d19cd7 | 288 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
863e88f2 | 289 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
e462ded6 | 290 | |
ed65963b | 291 | rc = ieee802154_check_concurrent_iface(sdata, wpan_dev->iftype); |
bd37a78d AA |
292 | if (rc < 0) |
293 | return rc; | |
294 | ||
95c0aa15 | 295 | return mac802154_slave_open(dev); |
e462ded6 PB |
296 | } |
297 | ||
19ec690a AA |
298 | static int mac802154_slave_close(struct net_device *dev) |
299 | { | |
300 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); | |
301 | struct ieee802154_local *local = sdata->local; | |
302 | ||
303 | ASSERT_RTNL(); | |
304 | ||
57588c71 MR |
305 | if (mac802154_is_scanning(local)) |
306 | mac802154_abort_scan_locked(local, sdata); | |
307 | ||
3accf476 MR |
308 | if (mac802154_is_beaconing(local)) |
309 | mac802154_stop_beacons_locked(local, sdata); | |
310 | ||
19ec690a | 311 | netif_stop_queue(dev); |
74457641 | 312 | local->open_count--; |
19ec690a | 313 | |
0ea3da64 | 314 | clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
19ec690a | 315 | |
c4227c8a AA |
316 | if (!local->open_count) |
317 | ieee802154_stop_device(local); | |
19ec690a AA |
318 | |
319 | return 0; | |
320 | } | |
321 | ||
036562f9 | 322 | static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata, |
f30be4d5 PB |
323 | struct ieee802154_hdr *hdr, |
324 | const struct ieee802154_mac_cb *cb) | |
325 | { | |
326 | struct ieee802154_llsec_params params; | |
327 | u8 level; | |
328 | ||
036562f9 | 329 | mac802154_llsec_get_params(&sdata->sec, ¶ms); |
f30be4d5 PB |
330 | |
331 | if (!params.enabled && cb->secen_override && cb->secen) | |
332 | return -EINVAL; | |
333 | if (!params.enabled || | |
334 | (cb->secen_override && !cb->secen) || | |
335 | !params.out_level) | |
336 | return 0; | |
337 | if (cb->seclevel_override && !cb->seclevel) | |
338 | return -EINVAL; | |
339 | ||
340 | level = cb->seclevel_override ? cb->seclevel : params.out_level; | |
341 | ||
342 | hdr->fc.security_enabled = 1; | |
343 | hdr->sec.level = level; | |
344 | hdr->sec.key_id_mode = params.out_key.mode; | |
345 | if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX) | |
346 | hdr->sec.short_src = params.out_key.short_source; | |
347 | else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX) | |
348 | hdr->sec.extended_src = params.out_key.extended_source; | |
349 | hdr->sec.key_id = params.out_key.id; | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
838b83d6 AA |
354 | static int ieee802154_header_create(struct sk_buff *skb, |
355 | struct net_device *dev, | |
356 | const struct ieee802154_addr *daddr, | |
357 | const struct ieee802154_addr *saddr, | |
358 | unsigned len) | |
32bad7e3 | 359 | { |
e6278d92 | 360 | struct ieee802154_hdr hdr; |
59d19cd7 | 361 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
863e88f2 | 362 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
32edc40a | 363 | struct ieee802154_mac_cb *cb = mac_cb(skb); |
e6278d92 | 364 | int hlen; |
32bad7e3 | 365 | |
366 | if (!daddr) | |
367 | return -EINVAL; | |
368 | ||
e6278d92 | 369 | memset(&hdr.fc, 0, sizeof(hdr.fc)); |
32edc40a PB |
370 | hdr.fc.type = cb->type; |
371 | hdr.fc.security_enabled = cb->secen; | |
372 | hdr.fc.ack_request = cb->ackreq; | |
344f8c11 | 373 | hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF; |
32bad7e3 | 374 | |
036562f9 | 375 | if (mac802154_set_header_security(sdata, &hdr, cb) < 0) |
f30be4d5 PB |
376 | return -EINVAL; |
377 | ||
32bad7e3 | 378 | if (!saddr) { |
863e88f2 AA |
379 | if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) || |
380 | wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) || | |
381 | wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) { | |
e6278d92 | 382 | hdr.source.mode = IEEE802154_ADDR_LONG; |
863e88f2 | 383 | hdr.source.extended_addr = wpan_dev->extended_addr; |
32bad7e3 | 384 | } else { |
e6278d92 | 385 | hdr.source.mode = IEEE802154_ADDR_SHORT; |
863e88f2 | 386 | hdr.source.short_addr = wpan_dev->short_addr; |
32bad7e3 | 387 | } |
388 | ||
863e88f2 | 389 | hdr.source.pan_id = wpan_dev->pan_id; |
e6278d92 PB |
390 | } else { |
391 | hdr.source = *(const struct ieee802154_addr *)saddr; | |
32bad7e3 | 392 | } |
393 | ||
e6278d92 | 394 | hdr.dest = *(const struct ieee802154_addr *)daddr; |
32bad7e3 | 395 | |
e6278d92 PB |
396 | hlen = ieee802154_hdr_push(skb, &hdr); |
397 | if (hlen < 0) | |
398 | return -EINVAL; | |
32bad7e3 | 399 | |
3e69162e | 400 | skb_reset_mac_header(skb); |
e6278d92 | 401 | skb->mac_len = hlen; |
32bad7e3 | 402 | |
8c84296f | 403 | if (len > ieee802154_max_payload(&hdr)) |
d1d7358e PB |
404 | return -EMSGSIZE; |
405 | ||
e6278d92 | 406 | return hlen; |
32bad7e3 | 407 | } |
408 | ||
838b83d6 AA |
409 | static const struct wpan_dev_header_ops ieee802154_header_ops = { |
410 | .create = ieee802154_header_create, | |
411 | }; | |
412 | ||
413 | /* This header create functionality assumes a 8 byte array for | |
414 | * source and destination pointer at maximum. To adapt this for | |
415 | * the 802.15.4 dataframe header we use extended address handling | |
416 | * here only and intra pan connection. fc fields are mostly fallback | |
417 | * handling. For provide dev_hard_header for dgram sockets. | |
418 | */ | |
419 | static int mac802154_header_create(struct sk_buff *skb, | |
420 | struct net_device *dev, | |
421 | unsigned short type, | |
422 | const void *daddr, | |
423 | const void *saddr, | |
424 | unsigned len) | |
425 | { | |
426 | struct ieee802154_hdr hdr; | |
427 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); | |
428 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; | |
429 | struct ieee802154_mac_cb cb = { }; | |
430 | int hlen; | |
431 | ||
432 | if (!daddr) | |
433 | return -EINVAL; | |
434 | ||
435 | memset(&hdr.fc, 0, sizeof(hdr.fc)); | |
436 | hdr.fc.type = IEEE802154_FC_TYPE_DATA; | |
437 | hdr.fc.ack_request = wpan_dev->ackreq; | |
438 | hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF; | |
439 | ||
440 | /* TODO currently a workaround to give zero cb block to set | |
441 | * security parameters defaults according MIB. | |
442 | */ | |
443 | if (mac802154_set_header_security(sdata, &hdr, &cb) < 0) | |
444 | return -EINVAL; | |
445 | ||
446 | hdr.dest.pan_id = wpan_dev->pan_id; | |
447 | hdr.dest.mode = IEEE802154_ADDR_LONG; | |
c2d5ecfa | 448 | ieee802154_be64_to_le64(&hdr.dest.extended_addr, daddr); |
838b83d6 AA |
449 | |
450 | hdr.source.pan_id = hdr.dest.pan_id; | |
451 | hdr.source.mode = IEEE802154_ADDR_LONG; | |
452 | ||
453 | if (!saddr) | |
454 | hdr.source.extended_addr = wpan_dev->extended_addr; | |
455 | else | |
c2d5ecfa | 456 | ieee802154_be64_to_le64(&hdr.source.extended_addr, saddr); |
838b83d6 AA |
457 | |
458 | hlen = ieee802154_hdr_push(skb, &hdr); | |
459 | if (hlen < 0) | |
460 | return -EINVAL; | |
461 | ||
462 | skb_reset_mac_header(skb); | |
463 | skb->mac_len = hlen; | |
464 | ||
465 | if (len > ieee802154_max_payload(&hdr)) | |
466 | return -EMSGSIZE; | |
467 | ||
468 | return hlen; | |
469 | } | |
470 | ||
32bad7e3 | 471 | static int |
472 | mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr) | |
473 | { | |
e6278d92 | 474 | struct ieee802154_hdr hdr; |
32bad7e3 | 475 | |
e6278d92 PB |
476 | if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) { |
477 | pr_debug("malformed packet\n"); | |
478 | return 0; | |
32bad7e3 | 479 | } |
480 | ||
838b83d6 | 481 | if (hdr.source.mode == IEEE802154_ADDR_LONG) { |
c2d5ecfa | 482 | ieee802154_le64_to_be64(haddr, &hdr.source.extended_addr); |
838b83d6 AA |
483 | return IEEE802154_EXTENDED_ADDR_LEN; |
484 | } | |
485 | ||
486 | return 0; | |
32bad7e3 | 487 | } |
488 | ||
838b83d6 AA |
489 | static const struct header_ops mac802154_header_ops = { |
490 | .create = mac802154_header_create, | |
491 | .parse = mac802154_header_parse, | |
32bad7e3 | 492 | }; |
493 | ||
494 | static const struct net_device_ops mac802154_wpan_ops = { | |
e462ded6 | 495 | .ndo_open = mac802154_wpan_open, |
32bad7e3 | 496 | .ndo_stop = mac802154_slave_close, |
e5e584fc | 497 | .ndo_start_xmit = ieee802154_subif_start_xmit, |
32bad7e3 | 498 | .ndo_do_ioctl = mac802154_wpan_ioctl, |
499 | .ndo_set_mac_address = mac802154_wpan_mac_addr, | |
500 | }; | |
501 | ||
b9ff77e5 | 502 | static const struct net_device_ops mac802154_monitor_ops = { |
38130c31 | 503 | .ndo_open = mac802154_wpan_open, |
b9ff77e5 AA |
504 | .ndo_stop = mac802154_slave_close, |
505 | .ndo_start_xmit = ieee802154_monitor_start_xmit, | |
506 | }; | |
507 | ||
f30be4d5 PB |
508 | static void mac802154_wpan_free(struct net_device *dev) |
509 | { | |
59d19cd7 | 510 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
f30be4d5 | 511 | |
036562f9 | 512 | mac802154_llsec_destroy(&sdata->sec); |
f30be4d5 PB |
513 | } |
514 | ||
d5ae67ba | 515 | static void ieee802154_if_setup(struct net_device *dev) |
32bad7e3 | 516 | { |
e57a8946 AA |
517 | dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN; |
518 | memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN); | |
32bad7e3 | 519 | |
87a93e4e AA |
520 | /* Let hard_header_len set to IEEE802154_MIN_HEADER_LEN. AF_PACKET |
521 | * will not send frames without any payload, but ack frames | |
522 | * has no payload, so substract one that we can send a 3 bytes | |
523 | * frame. The xmit callback assumes at least a hard header where two | |
524 | * bytes fc and sequence field are set. | |
525 | */ | |
526 | dev->hard_header_len = IEEE802154_MIN_HEADER_LEN - 1; | |
527 | /* The auth_tag header is for security and places in private payload | |
528 | * room of mac frame which stucks between payload and FCS field. | |
529 | */ | |
530 | dev->needed_tailroom = IEEE802154_MAX_AUTH_TAG_LEN + | |
531 | IEEE802154_FCS_LEN; | |
b40988c4 AA |
532 | /* The mtu size is the payload without mac header in this case. |
533 | * We have a dynamic length header with a minimum header length | |
534 | * which is hard_header_len. In this case we let mtu to the size | |
535 | * of maximum payload which is IEEE802154_MTU - IEEE802154_FCS_LEN - | |
536 | * hard_header_len. The FCS which is set by hardware or ndo_start_xmit | |
537 | * and the minimum mac header which can be evaluated inside driver | |
538 | * layer. The rest of mac header will be part of payload if greater | |
539 | * than hard_header_len. | |
540 | */ | |
541 | dev->mtu = IEEE802154_MTU - IEEE802154_FCS_LEN - | |
542 | dev->hard_header_len; | |
e937f583 | 543 | dev->tx_queue_len = 300; |
32bad7e3 | 544 | dev->flags = IFF_NOARP | IFF_BROADCAST; |
d5ae67ba | 545 | } |
32bad7e3 | 546 | |
d5ae67ba | 547 | static int |
944742a3 AA |
548 | ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata, |
549 | enum nl802154_iftype type) | |
d5ae67ba | 550 | { |
863e88f2 | 551 | struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
d77b4852 | 552 | int ret; |
344f8c11 | 553 | u8 tmp; |
863e88f2 | 554 | |
d5ae67ba | 555 | /* set some type-dependent values */ |
190ac1ca | 556 | sdata->wpan_dev.iftype = type; |
32bad7e3 | 557 | |
344f8c11 AA |
558 | get_random_bytes(&tmp, sizeof(tmp)); |
559 | atomic_set(&wpan_dev->bsn, tmp); | |
560 | get_random_bytes(&tmp, sizeof(tmp)); | |
561 | atomic_set(&wpan_dev->dsn, tmp); | |
32bad7e3 | 562 | |
e462ded6 | 563 | /* defaults per 802.15.4-2011 */ |
5fb3f026 AA |
564 | wpan_dev->min_be = 3; |
565 | wpan_dev->max_be = 5; | |
566 | wpan_dev->csma_retries = 4; | |
89c7d788 | 567 | wpan_dev->frame_retries = 3; |
e462ded6 | 568 | |
863e88f2 AA |
569 | wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST); |
570 | wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST); | |
f30be4d5 | 571 | |
d5ae67ba | 572 | switch (type) { |
2622e785 | 573 | case NL802154_IFTYPE_COORD: |
944742a3 | 574 | case NL802154_IFTYPE_NODE: |
b03c9ccc AA |
575 | ieee802154_be64_to_le64(&wpan_dev->extended_addr, |
576 | sdata->dev->dev_addr); | |
577 | ||
d5ae67ba | 578 | sdata->dev->header_ops = &mac802154_header_ops; |
cf124db5 DM |
579 | sdata->dev->needs_free_netdev = true; |
580 | sdata->dev->priv_destructor = mac802154_wpan_free; | |
d5ae67ba AA |
581 | sdata->dev->netdev_ops = &mac802154_wpan_ops; |
582 | sdata->dev->ml_priv = &mac802154_mlme_wpan; | |
ac8037c3 | 583 | sdata->iface_default_filtering = IEEE802154_FILTERING_4_FRAME_FIELDS; |
838b83d6 | 584 | wpan_dev->header_ops = &ieee802154_header_ops; |
986a8abf | 585 | |
d5ae67ba | 586 | mutex_init(&sdata->sec_mtx); |
986a8abf | 587 | |
d5ae67ba | 588 | mac802154_llsec_init(&sdata->sec); |
d77b4852 AA |
589 | ret = mac802154_wpan_update_llsec(sdata->dev); |
590 | if (ret < 0) | |
591 | return ret; | |
592 | ||
d5ae67ba | 593 | break; |
944742a3 | 594 | case NL802154_IFTYPE_MONITOR: |
cf124db5 | 595 | sdata->dev->needs_free_netdev = true; |
d5ae67ba | 596 | sdata->dev->netdev_ops = &mac802154_monitor_ops; |
ac8037c3 | 597 | sdata->iface_default_filtering = IEEE802154_FILTERING_NONE; |
d5ae67ba AA |
598 | break; |
599 | default: | |
600 | BUG(); | |
601 | } | |
986a8abf AA |
602 | |
603 | return 0; | |
604 | } | |
605 | ||
606 | struct net_device * | |
607 | ieee802154_if_add(struct ieee802154_local *local, const char *name, | |
5b4a1039 VB |
608 | unsigned char name_assign_type, enum nl802154_iftype type, |
609 | __le64 extended_addr) | |
986a8abf | 610 | { |
08bb7516 | 611 | u8 addr[IEEE802154_EXTENDED_ADDR_LEN]; |
d5ae67ba AA |
612 | struct net_device *ndev = NULL; |
613 | struct ieee802154_sub_if_data *sdata = NULL; | |
0f77f2de | 614 | int ret; |
d5ae67ba AA |
615 | |
616 | ASSERT_RTNL(); | |
617 | ||
ed65963b | 618 | ndev = alloc_netdev(sizeof(*sdata), name, |
5b4a1039 | 619 | name_assign_type, ieee802154_if_setup); |
d5ae67ba AA |
620 | if (!ndev) |
621 | return ERR_PTR(-ENOMEM); | |
622 | ||
87a93e4e AA |
623 | ndev->needed_headroom = local->hw.extra_tx_headroom + |
624 | IEEE802154_MAX_HEADER_LEN; | |
d5ae67ba AA |
625 | |
626 | ret = dev_alloc_name(ndev, ndev->name); | |
627 | if (ret < 0) | |
628 | goto err; | |
986a8abf | 629 | |
0e57547e AA |
630 | ieee802154_le64_to_be64(ndev->perm_addr, |
631 | &local->hw.phy->perm_extended_addr); | |
986a8abf | 632 | switch (type) { |
2622e785 | 633 | case NL802154_IFTYPE_COORD: |
944742a3 | 634 | case NL802154_IFTYPE_NODE: |
d5ae67ba | 635 | ndev->type = ARPHRD_IEEE802154; |
08bb7516 JK |
636 | if (ieee802154_is_valid_extended_unicast_addr(extended_addr)) { |
637 | ieee802154_le64_to_be64(addr, &extended_addr); | |
638 | dev_addr_set(ndev, addr); | |
639 | } else { | |
640 | dev_addr_set(ndev, ndev->perm_addr); | |
641 | } | |
986a8abf | 642 | break; |
944742a3 | 643 | case NL802154_IFTYPE_MONITOR: |
d5ae67ba | 644 | ndev->type = ARPHRD_IEEE802154_MONITOR; |
986a8abf | 645 | break; |
d5ae67ba AA |
646 | default: |
647 | ret = -EINVAL; | |
648 | goto err; | |
986a8abf | 649 | } |
d5ae67ba AA |
650 | |
651 | /* TODO check this */ | |
652 | SET_NETDEV_DEV(ndev, &local->phy->dev); | |
abbcc341 | 653 | dev_net_set(ndev, wpan_phy_net(local->hw.phy)); |
d5ae67ba AA |
654 | sdata = netdev_priv(ndev); |
655 | ndev->ieee802154_ptr = &sdata->wpan_dev; | |
656 | memcpy(sdata->name, ndev->name, IFNAMSIZ); | |
657 | sdata->dev = ndev; | |
658 | sdata->wpan_dev.wpan_phy = local->hw.phy; | |
659 | sdata->local = local; | |
b3d72d31 | 660 | INIT_LIST_HEAD(&sdata->wpan_dev.list); |
d5ae67ba AA |
661 | |
662 | /* setup type-dependent data */ | |
663 | ret = ieee802154_setup_sdata(sdata, type); | |
664 | if (ret) | |
986a8abf AA |
665 | goto err; |
666 | ||
473f3766 VB |
667 | ret = register_netdevice(ndev); |
668 | if (ret < 0) | |
669 | goto err; | |
d5ae67ba AA |
670 | |
671 | mutex_lock(&local->iflist_mtx); | |
672 | list_add_tail_rcu(&sdata->list, &local->interfaces); | |
673 | mutex_unlock(&local->iflist_mtx); | |
986a8abf | 674 | |
d5ae67ba | 675 | return ndev; |
986a8abf | 676 | |
986a8abf | 677 | err: |
d5ae67ba AA |
678 | free_netdev(ndev); |
679 | return ERR_PTR(ret); | |
986a8abf AA |
680 | } |
681 | ||
b210b187 AA |
682 | void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata) |
683 | { | |
684 | ASSERT_RTNL(); | |
685 | ||
686 | mutex_lock(&sdata->local->iflist_mtx); | |
687 | list_del_rcu(&sdata->list); | |
688 | mutex_unlock(&sdata->local->iflist_mtx); | |
689 | ||
690 | synchronize_rcu(); | |
691 | unregister_netdevice(sdata->dev); | |
692 | } | |
592dfbfc AA |
693 | |
694 | void ieee802154_remove_interfaces(struct ieee802154_local *local) | |
695 | { | |
d14e1c71 | 696 | struct ieee802154_sub_if_data *sdata, *tmp; |
592dfbfc | 697 | |
2789e629 | 698 | mutex_lock(&local->iflist_mtx); |
d14e1c71 | 699 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
592dfbfc | 700 | list_del(&sdata->list); |
592dfbfc AA |
701 | |
702 | unregister_netdevice(sdata->dev); | |
703 | } | |
2789e629 | 704 | mutex_unlock(&local->iflist_mtx); |
592dfbfc | 705 | } |
be4fd8e5 AA |
706 | |
707 | static int netdev_notify(struct notifier_block *nb, | |
708 | unsigned long state, void *ptr) | |
709 | { | |
710 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
711 | struct ieee802154_sub_if_data *sdata; | |
712 | ||
713 | if (state != NETDEV_CHANGENAME) | |
714 | return NOTIFY_DONE; | |
715 | ||
716 | if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy) | |
717 | return NOTIFY_DONE; | |
718 | ||
719 | if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid) | |
720 | return NOTIFY_DONE; | |
721 | ||
722 | sdata = IEEE802154_DEV_TO_SUB_IF(dev); | |
723 | memcpy(sdata->name, dev->name, IFNAMSIZ); | |
724 | ||
725 | return NOTIFY_OK; | |
726 | } | |
727 | ||
728 | static struct notifier_block mac802154_netdev_notifier = { | |
729 | .notifier_call = netdev_notify, | |
730 | }; | |
731 | ||
732 | int ieee802154_iface_init(void) | |
733 | { | |
734 | return register_netdevice_notifier(&mac802154_netdev_notifier); | |
735 | } | |
736 | ||
737 | void ieee802154_iface_exit(void) | |
738 | { | |
739 | unregister_netdevice_notifier(&mac802154_netdev_notifier); | |
740 | } |