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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 | |
25 | #include <net/rtnetlink.h> | |
26 | #include <linux/nl802154.h> | |
27 | #include <net/af_ieee802154.h> | |
28 | #include <net/mac802154.h> | |
29 | #include <net/ieee802154_netdev.h> | |
5ad60d36 | 30 | #include <net/cfg802154.h> |
32bad7e3 | 31 | |
0f1556bc | 32 | #include "ieee802154_i.h" |
59cb300f | 33 | #include "driver-ops.h" |
32bad7e3 | 34 | |
9b0bb4a8 PB |
35 | static int mac802154_wpan_update_llsec(struct net_device *dev) |
36 | { | |
59d19cd7 | 37 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
9b0bb4a8 PB |
38 | struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev); |
39 | int rc = 0; | |
40 | ||
41 | if (ops->llsec) { | |
42 | struct ieee802154_llsec_params params; | |
43 | int changed = 0; | |
44 | ||
036562f9 | 45 | params.pan_id = sdata->pan_id; |
9b0bb4a8 PB |
46 | changed |= IEEE802154_LLSEC_PARAM_PAN_ID; |
47 | ||
036562f9 | 48 | params.hwaddr = sdata->extended_addr; |
9b0bb4a8 PB |
49 | changed |= IEEE802154_LLSEC_PARAM_HWADDR; |
50 | ||
51 | rc = ops->llsec->set_params(dev, ¶ms, changed); | |
52 | } | |
53 | ||
54 | return rc; | |
55 | } | |
56 | ||
32bad7e3 | 57 | static int |
58 | mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
59 | { | |
59d19cd7 | 60 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
32bad7e3 | 61 | struct sockaddr_ieee802154 *sa = |
62 | (struct sockaddr_ieee802154 *)&ifr->ifr_addr; | |
63 | int err = -ENOIOCTLCMD; | |
64 | ||
036562f9 | 65 | spin_lock_bh(&sdata->mib_lock); |
32bad7e3 | 66 | |
67 | switch (cmd) { | |
68 | case SIOCGIFADDR: | |
b70ab2e8 PB |
69 | { |
70 | u16 pan_id, short_addr; | |
71 | ||
036562f9 AA |
72 | pan_id = le16_to_cpu(sdata->pan_id); |
73 | short_addr = le16_to_cpu(sdata->short_addr); | |
b70ab2e8 PB |
74 | if (pan_id == IEEE802154_PANID_BROADCAST || |
75 | short_addr == IEEE802154_ADDR_BROADCAST) { | |
32bad7e3 | 76 | err = -EADDRNOTAVAIL; |
77 | break; | |
78 | } | |
79 | ||
80 | sa->family = AF_IEEE802154; | |
81 | sa->addr.addr_type = IEEE802154_ADDR_SHORT; | |
b70ab2e8 PB |
82 | sa->addr.pan_id = pan_id; |
83 | sa->addr.short_addr = short_addr; | |
32bad7e3 | 84 | |
85 | err = 0; | |
86 | break; | |
b70ab2e8 | 87 | } |
32bad7e3 | 88 | case SIOCSIFADDR: |
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 | ||
036562f9 AA |
100 | sdata->pan_id = cpu_to_le16(sa->addr.pan_id); |
101 | sdata->short_addr = cpu_to_le16(sa->addr.short_addr); | |
32bad7e3 | 102 | |
9b0bb4a8 | 103 | err = mac802154_wpan_update_llsec(dev); |
32bad7e3 | 104 | break; |
105 | } | |
106 | ||
036562f9 | 107 | spin_unlock_bh(&sdata->mib_lock); |
32bad7e3 | 108 | return err; |
109 | } | |
110 | ||
111 | static int mac802154_wpan_mac_addr(struct net_device *dev, void *p) | |
112 | { | |
113 | struct sockaddr *addr = p; | |
114 | ||
115 | if (netif_running(dev)) | |
116 | return -EBUSY; | |
117 | ||
118 | /* FIXME: validate addr */ | |
119 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); | |
120 | mac802154_dev_set_ieee_addr(dev); | |
9b0bb4a8 | 121 | return mac802154_wpan_update_llsec(dev); |
32bad7e3 | 122 | } |
123 | ||
e462ded6 PB |
124 | int mac802154_set_mac_params(struct net_device *dev, |
125 | const struct ieee802154_mac_params *params) | |
126 | { | |
59d19cd7 | 127 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
e462ded6 | 128 | |
d98be45b | 129 | mutex_lock(&sdata->local->iflist_mtx); |
036562f9 | 130 | sdata->mac_params = *params; |
d98be45b | 131 | mutex_unlock(&sdata->local->iflist_mtx); |
e462ded6 PB |
132 | |
133 | return 0; | |
134 | } | |
135 | ||
136 | void mac802154_get_mac_params(struct net_device *dev, | |
137 | struct ieee802154_mac_params *params) | |
138 | { | |
59d19cd7 | 139 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
e462ded6 | 140 | |
d98be45b | 141 | mutex_lock(&sdata->local->iflist_mtx); |
036562f9 | 142 | *params = sdata->mac_params; |
d98be45b | 143 | mutex_unlock(&sdata->local->iflist_mtx); |
e462ded6 PB |
144 | } |
145 | ||
19ec690a AA |
146 | static int mac802154_slave_open(struct net_device *dev) |
147 | { | |
148 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); | |
149 | struct ieee802154_sub_if_data *subif; | |
150 | struct ieee802154_local *local = sdata->local; | |
151 | int res = 0; | |
152 | ||
153 | ASSERT_RTNL(); | |
154 | ||
155 | if (sdata->type == IEEE802154_DEV_WPAN) { | |
156 | mutex_lock(&sdata->local->iflist_mtx); | |
157 | list_for_each_entry(subif, &sdata->local->interfaces, list) { | |
158 | if (subif != sdata && subif->type == sdata->type && | |
159 | subif->running) { | |
160 | mutex_unlock(&sdata->local->iflist_mtx); | |
161 | return -EBUSY; | |
162 | } | |
163 | } | |
164 | mutex_unlock(&sdata->local->iflist_mtx); | |
165 | } | |
166 | ||
167 | mutex_lock(&sdata->local->iflist_mtx); | |
168 | sdata->running = true; | |
169 | mutex_unlock(&sdata->local->iflist_mtx); | |
170 | ||
171 | if (local->open_count++ == 0) { | |
59cb300f | 172 | res = drv_start(local); |
19ec690a AA |
173 | WARN_ON(res); |
174 | if (res) | |
175 | goto err; | |
176 | } | |
177 | ||
178 | netif_start_queue(dev); | |
179 | return 0; | |
180 | err: | |
181 | sdata->local->open_count--; | |
182 | ||
183 | return res; | |
184 | } | |
185 | ||
6ef0023a | 186 | static int mac802154_wpan_open(struct net_device *dev) |
e462ded6 PB |
187 | { |
188 | int rc; | |
59d19cd7 | 189 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
59cb300f | 190 | struct ieee802154_local *local = sdata->local; |
04e850fe | 191 | struct wpan_phy *phy = sdata->local->phy; |
e462ded6 PB |
192 | |
193 | rc = mac802154_slave_open(dev); | |
194 | if (rc < 0) | |
195 | return rc; | |
196 | ||
197 | mutex_lock(&phy->pib_lock); | |
198 | ||
199 | if (phy->set_txpower) { | |
59cb300f | 200 | rc = drv_set_tx_power(local, sdata->mac_params.transmit_power); |
e462ded6 PB |
201 | if (rc < 0) |
202 | goto out; | |
203 | } | |
204 | ||
205 | if (phy->set_lbt) { | |
59cb300f | 206 | rc = drv_set_lbt_mode(local, sdata->mac_params.lbt); |
e462ded6 PB |
207 | if (rc < 0) |
208 | goto out; | |
209 | } | |
210 | ||
211 | if (phy->set_cca_mode) { | |
59cb300f | 212 | rc = drv_set_cca_mode(local, sdata->mac_params.cca_mode); |
e462ded6 PB |
213 | if (rc < 0) |
214 | goto out; | |
215 | } | |
216 | ||
217 | if (phy->set_cca_ed_level) { | |
59cb300f AA |
218 | rc = drv_set_cca_ed_level(local, |
219 | sdata->mac_params.cca_ed_level); | |
e462ded6 PB |
220 | if (rc < 0) |
221 | goto out; | |
222 | } | |
223 | ||
224 | if (phy->set_csma_params) { | |
59cb300f AA |
225 | rc = drv_set_csma_params(local, sdata->mac_params.min_be, |
226 | sdata->mac_params.max_be, | |
227 | sdata->mac_params.csma_retries); | |
e462ded6 PB |
228 | if (rc < 0) |
229 | goto out; | |
230 | } | |
231 | ||
232 | if (phy->set_frame_retries) { | |
59cb300f AA |
233 | rc = drv_set_max_frame_retries(local, |
234 | sdata->mac_params.frame_retries); | |
e462ded6 PB |
235 | if (rc < 0) |
236 | goto out; | |
237 | } | |
238 | ||
239 | mutex_unlock(&phy->pib_lock); | |
240 | return 0; | |
241 | ||
242 | out: | |
243 | mutex_unlock(&phy->pib_lock); | |
244 | return rc; | |
245 | } | |
246 | ||
19ec690a AA |
247 | static int mac802154_slave_close(struct net_device *dev) |
248 | { | |
249 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); | |
250 | struct ieee802154_local *local = sdata->local; | |
251 | ||
252 | ASSERT_RTNL(); | |
253 | ||
254 | netif_stop_queue(dev); | |
255 | ||
256 | mutex_lock(&sdata->local->iflist_mtx); | |
257 | sdata->running = false; | |
258 | mutex_unlock(&sdata->local->iflist_mtx); | |
259 | ||
260 | if (!--local->open_count) | |
59cb300f | 261 | drv_stop(local); |
19ec690a AA |
262 | |
263 | return 0; | |
264 | } | |
265 | ||
036562f9 | 266 | static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata, |
f30be4d5 PB |
267 | struct ieee802154_hdr *hdr, |
268 | const struct ieee802154_mac_cb *cb) | |
269 | { | |
270 | struct ieee802154_llsec_params params; | |
271 | u8 level; | |
272 | ||
036562f9 | 273 | mac802154_llsec_get_params(&sdata->sec, ¶ms); |
f30be4d5 PB |
274 | |
275 | if (!params.enabled && cb->secen_override && cb->secen) | |
276 | return -EINVAL; | |
277 | if (!params.enabled || | |
278 | (cb->secen_override && !cb->secen) || | |
279 | !params.out_level) | |
280 | return 0; | |
281 | if (cb->seclevel_override && !cb->seclevel) | |
282 | return -EINVAL; | |
283 | ||
284 | level = cb->seclevel_override ? cb->seclevel : params.out_level; | |
285 | ||
286 | hdr->fc.security_enabled = 1; | |
287 | hdr->sec.level = level; | |
288 | hdr->sec.key_id_mode = params.out_key.mode; | |
289 | if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX) | |
290 | hdr->sec.short_src = params.out_key.short_source; | |
291 | else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX) | |
292 | hdr->sec.extended_src = params.out_key.extended_source; | |
293 | hdr->sec.key_id = params.out_key.id; | |
294 | ||
295 | return 0; | |
296 | } | |
297 | ||
32bad7e3 | 298 | static int mac802154_header_create(struct sk_buff *skb, |
299 | struct net_device *dev, | |
300 | unsigned short type, | |
e6278d92 PB |
301 | const void *daddr, |
302 | const void *saddr, | |
32bad7e3 | 303 | unsigned len) |
304 | { | |
e6278d92 | 305 | struct ieee802154_hdr hdr; |
59d19cd7 | 306 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
32edc40a | 307 | struct ieee802154_mac_cb *cb = mac_cb(skb); |
e6278d92 | 308 | int hlen; |
32bad7e3 | 309 | |
310 | if (!daddr) | |
311 | return -EINVAL; | |
312 | ||
e6278d92 | 313 | memset(&hdr.fc, 0, sizeof(hdr.fc)); |
32edc40a PB |
314 | hdr.fc.type = cb->type; |
315 | hdr.fc.security_enabled = cb->secen; | |
316 | hdr.fc.ack_request = cb->ackreq; | |
317 | hdr.seq = ieee802154_mlme_ops(dev)->get_dsn(dev); | |
32bad7e3 | 318 | |
036562f9 | 319 | if (mac802154_set_header_security(sdata, &hdr, cb) < 0) |
f30be4d5 PB |
320 | return -EINVAL; |
321 | ||
32bad7e3 | 322 | if (!saddr) { |
036562f9 | 323 | spin_lock_bh(&sdata->mib_lock); |
32bad7e3 | 324 | |
036562f9 AA |
325 | if (sdata->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) || |
326 | sdata->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) || | |
327 | sdata->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) { | |
e6278d92 | 328 | hdr.source.mode = IEEE802154_ADDR_LONG; |
036562f9 | 329 | hdr.source.extended_addr = sdata->extended_addr; |
32bad7e3 | 330 | } else { |
e6278d92 | 331 | hdr.source.mode = IEEE802154_ADDR_SHORT; |
036562f9 | 332 | hdr.source.short_addr = sdata->short_addr; |
32bad7e3 | 333 | } |
334 | ||
036562f9 | 335 | hdr.source.pan_id = sdata->pan_id; |
32bad7e3 | 336 | |
036562f9 | 337 | spin_unlock_bh(&sdata->mib_lock); |
e6278d92 PB |
338 | } else { |
339 | hdr.source = *(const struct ieee802154_addr *)saddr; | |
32bad7e3 | 340 | } |
341 | ||
e6278d92 | 342 | hdr.dest = *(const struct ieee802154_addr *)daddr; |
32bad7e3 | 343 | |
e6278d92 PB |
344 | hlen = ieee802154_hdr_push(skb, &hdr); |
345 | if (hlen < 0) | |
346 | return -EINVAL; | |
32bad7e3 | 347 | |
3e69162e | 348 | skb_reset_mac_header(skb); |
e6278d92 | 349 | skb->mac_len = hlen; |
32bad7e3 | 350 | |
8c84296f | 351 | if (len > ieee802154_max_payload(&hdr)) |
d1d7358e PB |
352 | return -EMSGSIZE; |
353 | ||
e6278d92 | 354 | return hlen; |
32bad7e3 | 355 | } |
356 | ||
357 | static int | |
358 | mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr) | |
359 | { | |
e6278d92 PB |
360 | struct ieee802154_hdr hdr; |
361 | struct ieee802154_addr *addr = (struct ieee802154_addr *)haddr; | |
32bad7e3 | 362 | |
e6278d92 PB |
363 | if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) { |
364 | pr_debug("malformed packet\n"); | |
365 | return 0; | |
32bad7e3 | 366 | } |
367 | ||
e6278d92 PB |
368 | *addr = hdr.source; |
369 | return sizeof(*addr); | |
32bad7e3 | 370 | } |
371 | ||
32bad7e3 | 372 | static struct header_ops mac802154_header_ops = { |
373 | .create = mac802154_header_create, | |
374 | .parse = mac802154_header_parse, | |
375 | }; | |
376 | ||
377 | static const struct net_device_ops mac802154_wpan_ops = { | |
e462ded6 | 378 | .ndo_open = mac802154_wpan_open, |
32bad7e3 | 379 | .ndo_stop = mac802154_slave_close, |
e5e584fc | 380 | .ndo_start_xmit = ieee802154_subif_start_xmit, |
32bad7e3 | 381 | .ndo_do_ioctl = mac802154_wpan_ioctl, |
382 | .ndo_set_mac_address = mac802154_wpan_mac_addr, | |
383 | }; | |
384 | ||
b9ff77e5 AA |
385 | static const struct net_device_ops mac802154_monitor_ops = { |
386 | .ndo_open = mac802154_slave_open, | |
387 | .ndo_stop = mac802154_slave_close, | |
388 | .ndo_start_xmit = ieee802154_monitor_start_xmit, | |
389 | }; | |
390 | ||
f30be4d5 PB |
391 | static void mac802154_wpan_free(struct net_device *dev) |
392 | { | |
59d19cd7 | 393 | struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
f30be4d5 | 394 | |
036562f9 | 395 | mac802154_llsec_destroy(&sdata->sec); |
f30be4d5 PB |
396 | |
397 | free_netdev(dev); | |
398 | } | |
399 | ||
32bad7e3 | 400 | void mac802154_wpan_setup(struct net_device *dev) |
401 | { | |
036562f9 | 402 | struct ieee802154_sub_if_data *sdata; |
32bad7e3 | 403 | |
404 | dev->addr_len = IEEE802154_ADDR_LEN; | |
405 | memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN); | |
406 | ||
407 | dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN; | |
408 | dev->header_ops = &mac802154_header_ops; | |
f30be4d5 | 409 | dev->needed_tailroom = 2 + 16; /* FCS + MIC */ |
32bad7e3 | 410 | dev->mtu = IEEE802154_MTU; |
e937f583 | 411 | dev->tx_queue_len = 300; |
32bad7e3 | 412 | dev->type = ARPHRD_IEEE802154; |
413 | dev->flags = IFF_NOARP | IFF_BROADCAST; | |
414 | dev->watchdog_timeo = 0; | |
415 | ||
f30be4d5 | 416 | dev->destructor = mac802154_wpan_free; |
32bad7e3 | 417 | dev->netdev_ops = &mac802154_wpan_ops; |
418 | dev->ml_priv = &mac802154_mlme_wpan; | |
419 | ||
59d19cd7 | 420 | sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
036562f9 | 421 | sdata->type = IEEE802154_DEV_WPAN; |
32bad7e3 | 422 | |
036562f9 AA |
423 | sdata->chan = MAC802154_CHAN_NONE; |
424 | sdata->page = 0; | |
32bad7e3 | 425 | |
036562f9 AA |
426 | spin_lock_init(&sdata->mib_lock); |
427 | mutex_init(&sdata->sec_mtx); | |
32bad7e3 | 428 | |
036562f9 AA |
429 | get_random_bytes(&sdata->bsn, 1); |
430 | get_random_bytes(&sdata->dsn, 1); | |
32bad7e3 | 431 | |
e462ded6 | 432 | /* defaults per 802.15.4-2011 */ |
036562f9 AA |
433 | sdata->mac_params.min_be = 3; |
434 | sdata->mac_params.max_be = 5; | |
435 | sdata->mac_params.csma_retries = 4; | |
436 | /* for compatibility, actual default is 3 */ | |
437 | sdata->mac_params.frame_retries = -1; | |
e462ded6 | 438 | |
036562f9 AA |
439 | sdata->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST); |
440 | sdata->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST); | |
f30be4d5 | 441 | |
036562f9 | 442 | mac802154_llsec_init(&sdata->sec); |
32bad7e3 | 443 | } |
b9ff77e5 AA |
444 | |
445 | void mac802154_monitor_setup(struct net_device *dev) | |
446 | { | |
447 | struct ieee802154_sub_if_data *sdata; | |
448 | ||
449 | dev->addr_len = 0; | |
450 | dev->hard_header_len = 0; | |
451 | dev->needed_tailroom = 2; /* room for FCS */ | |
452 | dev->mtu = IEEE802154_MTU; | |
453 | dev->tx_queue_len = 10; | |
454 | dev->type = ARPHRD_IEEE802154_MONITOR; | |
455 | dev->flags = IFF_NOARP | IFF_BROADCAST; | |
456 | dev->watchdog_timeo = 0; | |
457 | ||
458 | dev->destructor = free_netdev; | |
459 | dev->netdev_ops = &mac802154_monitor_ops; | |
460 | dev->ml_priv = &mac802154_mlme_reduced; | |
461 | ||
462 | sdata = IEEE802154_DEV_TO_SUB_IF(dev); | |
463 | sdata->type = IEEE802154_DEV_MONITOR; | |
464 | ||
465 | sdata->chan = MAC802154_CHAN_NONE; /* not initialized */ | |
466 | sdata->page = 0; | |
467 | } |