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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" |
32bad7e3 | 33 | |
9b0bb4a8 PB |
34 | static int mac802154_wpan_update_llsec(struct net_device *dev) |
35 | { | |
036562f9 | 36 | struct ieee802154_sub_if_data *sdata = netdev_priv(dev); |
9b0bb4a8 PB |
37 | struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev); |
38 | int rc = 0; | |
39 | ||
40 | if (ops->llsec) { | |
41 | struct ieee802154_llsec_params params; | |
42 | int changed = 0; | |
43 | ||
036562f9 | 44 | params.pan_id = sdata->pan_id; |
9b0bb4a8 PB |
45 | changed |= IEEE802154_LLSEC_PARAM_PAN_ID; |
46 | ||
036562f9 | 47 | params.hwaddr = sdata->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 | { | |
036562f9 | 59 | struct ieee802154_sub_if_data *sdata = netdev_priv(dev); |
32bad7e3 | 60 | struct sockaddr_ieee802154 *sa = |
61 | (struct sockaddr_ieee802154 *)&ifr->ifr_addr; | |
62 | int err = -ENOIOCTLCMD; | |
63 | ||
036562f9 | 64 | spin_lock_bh(&sdata->mib_lock); |
32bad7e3 | 65 | |
66 | switch (cmd) { | |
67 | case SIOCGIFADDR: | |
b70ab2e8 PB |
68 | { |
69 | u16 pan_id, short_addr; | |
70 | ||
036562f9 AA |
71 | pan_id = le16_to_cpu(sdata->pan_id); |
72 | short_addr = le16_to_cpu(sdata->short_addr); | |
b70ab2e8 PB |
73 | if (pan_id == IEEE802154_PANID_BROADCAST || |
74 | short_addr == IEEE802154_ADDR_BROADCAST) { | |
32bad7e3 | 75 | err = -EADDRNOTAVAIL; |
76 | break; | |
77 | } | |
78 | ||
79 | sa->family = AF_IEEE802154; | |
80 | sa->addr.addr_type = IEEE802154_ADDR_SHORT; | |
b70ab2e8 PB |
81 | sa->addr.pan_id = pan_id; |
82 | sa->addr.short_addr = short_addr; | |
32bad7e3 | 83 | |
84 | err = 0; | |
85 | break; | |
b70ab2e8 | 86 | } |
32bad7e3 | 87 | case SIOCSIFADDR: |
88 | dev_warn(&dev->dev, | |
9b13494c | 89 | "Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n"); |
32bad7e3 | 90 | if (sa->family != AF_IEEE802154 || |
91 | sa->addr.addr_type != IEEE802154_ADDR_SHORT || | |
92 | sa->addr.pan_id == IEEE802154_PANID_BROADCAST || | |
93 | sa->addr.short_addr == IEEE802154_ADDR_BROADCAST || | |
94 | sa->addr.short_addr == IEEE802154_ADDR_UNDEF) { | |
95 | err = -EINVAL; | |
96 | break; | |
97 | } | |
98 | ||
036562f9 AA |
99 | sdata->pan_id = cpu_to_le16(sa->addr.pan_id); |
100 | sdata->short_addr = cpu_to_le16(sa->addr.short_addr); | |
32bad7e3 | 101 | |
9b0bb4a8 | 102 | err = mac802154_wpan_update_llsec(dev); |
32bad7e3 | 103 | break; |
104 | } | |
105 | ||
036562f9 | 106 | spin_unlock_bh(&sdata->mib_lock); |
32bad7e3 | 107 | return err; |
108 | } | |
109 | ||
110 | static int mac802154_wpan_mac_addr(struct net_device *dev, void *p) | |
111 | { | |
112 | struct sockaddr *addr = p; | |
113 | ||
114 | if (netif_running(dev)) | |
115 | return -EBUSY; | |
116 | ||
117 | /* FIXME: validate addr */ | |
118 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); | |
119 | mac802154_dev_set_ieee_addr(dev); | |
9b0bb4a8 | 120 | return mac802154_wpan_update_llsec(dev); |
32bad7e3 | 121 | } |
122 | ||
e462ded6 PB |
123 | int mac802154_set_mac_params(struct net_device *dev, |
124 | const struct ieee802154_mac_params *params) | |
125 | { | |
036562f9 | 126 | struct ieee802154_sub_if_data *sdata = netdev_priv(dev); |
e462ded6 | 127 | |
d98be45b | 128 | mutex_lock(&sdata->local->iflist_mtx); |
036562f9 | 129 | sdata->mac_params = *params; |
d98be45b | 130 | mutex_unlock(&sdata->local->iflist_mtx); |
e462ded6 PB |
131 | |
132 | return 0; | |
133 | } | |
134 | ||
135 | void mac802154_get_mac_params(struct net_device *dev, | |
136 | struct ieee802154_mac_params *params) | |
137 | { | |
036562f9 | 138 | struct ieee802154_sub_if_data *sdata = netdev_priv(dev); |
e462ded6 | 139 | |
d98be45b | 140 | mutex_lock(&sdata->local->iflist_mtx); |
036562f9 | 141 | *params = sdata->mac_params; |
d98be45b | 142 | mutex_unlock(&sdata->local->iflist_mtx); |
e462ded6 PB |
143 | } |
144 | ||
6ef0023a | 145 | static int mac802154_wpan_open(struct net_device *dev) |
e462ded6 PB |
146 | { |
147 | int rc; | |
036562f9 | 148 | struct ieee802154_sub_if_data *sdata = netdev_priv(dev); |
04e850fe | 149 | struct wpan_phy *phy = sdata->local->phy; |
e462ded6 PB |
150 | |
151 | rc = mac802154_slave_open(dev); | |
152 | if (rc < 0) | |
153 | return rc; | |
154 | ||
155 | mutex_lock(&phy->pib_lock); | |
156 | ||
157 | if (phy->set_txpower) { | |
036562f9 | 158 | rc = phy->set_txpower(phy, sdata->mac_params.transmit_power); |
e462ded6 PB |
159 | if (rc < 0) |
160 | goto out; | |
161 | } | |
162 | ||
163 | if (phy->set_lbt) { | |
036562f9 | 164 | rc = phy->set_lbt(phy, sdata->mac_params.lbt); |
e462ded6 PB |
165 | if (rc < 0) |
166 | goto out; | |
167 | } | |
168 | ||
169 | if (phy->set_cca_mode) { | |
036562f9 | 170 | rc = phy->set_cca_mode(phy, sdata->mac_params.cca_mode); |
e462ded6 PB |
171 | if (rc < 0) |
172 | goto out; | |
173 | } | |
174 | ||
175 | if (phy->set_cca_ed_level) { | |
036562f9 | 176 | rc = phy->set_cca_ed_level(phy, sdata->mac_params.cca_ed_level); |
e462ded6 PB |
177 | if (rc < 0) |
178 | goto out; | |
179 | } | |
180 | ||
181 | if (phy->set_csma_params) { | |
036562f9 AA |
182 | rc = phy->set_csma_params(phy, sdata->mac_params.min_be, |
183 | sdata->mac_params.max_be, | |
184 | sdata->mac_params.csma_retries); | |
e462ded6 PB |
185 | if (rc < 0) |
186 | goto out; | |
187 | } | |
188 | ||
189 | if (phy->set_frame_retries) { | |
190 | rc = phy->set_frame_retries(phy, | |
036562f9 | 191 | sdata->mac_params.frame_retries); |
e462ded6 PB |
192 | if (rc < 0) |
193 | goto out; | |
194 | } | |
195 | ||
196 | mutex_unlock(&phy->pib_lock); | |
197 | return 0; | |
198 | ||
199 | out: | |
200 | mutex_unlock(&phy->pib_lock); | |
201 | return rc; | |
202 | } | |
203 | ||
036562f9 | 204 | static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata, |
f30be4d5 PB |
205 | struct ieee802154_hdr *hdr, |
206 | const struct ieee802154_mac_cb *cb) | |
207 | { | |
208 | struct ieee802154_llsec_params params; | |
209 | u8 level; | |
210 | ||
036562f9 | 211 | mac802154_llsec_get_params(&sdata->sec, ¶ms); |
f30be4d5 PB |
212 | |
213 | if (!params.enabled && cb->secen_override && cb->secen) | |
214 | return -EINVAL; | |
215 | if (!params.enabled || | |
216 | (cb->secen_override && !cb->secen) || | |
217 | !params.out_level) | |
218 | return 0; | |
219 | if (cb->seclevel_override && !cb->seclevel) | |
220 | return -EINVAL; | |
221 | ||
222 | level = cb->seclevel_override ? cb->seclevel : params.out_level; | |
223 | ||
224 | hdr->fc.security_enabled = 1; | |
225 | hdr->sec.level = level; | |
226 | hdr->sec.key_id_mode = params.out_key.mode; | |
227 | if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX) | |
228 | hdr->sec.short_src = params.out_key.short_source; | |
229 | else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX) | |
230 | hdr->sec.extended_src = params.out_key.extended_source; | |
231 | hdr->sec.key_id = params.out_key.id; | |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
32bad7e3 | 236 | static int mac802154_header_create(struct sk_buff *skb, |
237 | struct net_device *dev, | |
238 | unsigned short type, | |
e6278d92 PB |
239 | const void *daddr, |
240 | const void *saddr, | |
32bad7e3 | 241 | unsigned len) |
242 | { | |
e6278d92 | 243 | struct ieee802154_hdr hdr; |
036562f9 | 244 | struct ieee802154_sub_if_data *sdata = netdev_priv(dev); |
32edc40a | 245 | struct ieee802154_mac_cb *cb = mac_cb(skb); |
e6278d92 | 246 | int hlen; |
32bad7e3 | 247 | |
248 | if (!daddr) | |
249 | return -EINVAL; | |
250 | ||
e6278d92 | 251 | memset(&hdr.fc, 0, sizeof(hdr.fc)); |
32edc40a PB |
252 | hdr.fc.type = cb->type; |
253 | hdr.fc.security_enabled = cb->secen; | |
254 | hdr.fc.ack_request = cb->ackreq; | |
255 | hdr.seq = ieee802154_mlme_ops(dev)->get_dsn(dev); | |
32bad7e3 | 256 | |
036562f9 | 257 | if (mac802154_set_header_security(sdata, &hdr, cb) < 0) |
f30be4d5 PB |
258 | return -EINVAL; |
259 | ||
32bad7e3 | 260 | if (!saddr) { |
036562f9 | 261 | spin_lock_bh(&sdata->mib_lock); |
32bad7e3 | 262 | |
036562f9 AA |
263 | if (sdata->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) || |
264 | sdata->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) || | |
265 | sdata->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) { | |
e6278d92 | 266 | hdr.source.mode = IEEE802154_ADDR_LONG; |
036562f9 | 267 | hdr.source.extended_addr = sdata->extended_addr; |
32bad7e3 | 268 | } else { |
e6278d92 | 269 | hdr.source.mode = IEEE802154_ADDR_SHORT; |
036562f9 | 270 | hdr.source.short_addr = sdata->short_addr; |
32bad7e3 | 271 | } |
272 | ||
036562f9 | 273 | hdr.source.pan_id = sdata->pan_id; |
32bad7e3 | 274 | |
036562f9 | 275 | spin_unlock_bh(&sdata->mib_lock); |
e6278d92 PB |
276 | } else { |
277 | hdr.source = *(const struct ieee802154_addr *)saddr; | |
32bad7e3 | 278 | } |
279 | ||
e6278d92 | 280 | hdr.dest = *(const struct ieee802154_addr *)daddr; |
32bad7e3 | 281 | |
e6278d92 PB |
282 | hlen = ieee802154_hdr_push(skb, &hdr); |
283 | if (hlen < 0) | |
284 | return -EINVAL; | |
32bad7e3 | 285 | |
3e69162e | 286 | skb_reset_mac_header(skb); |
e6278d92 | 287 | skb->mac_len = hlen; |
32bad7e3 | 288 | |
8c84296f | 289 | if (len > ieee802154_max_payload(&hdr)) |
d1d7358e PB |
290 | return -EMSGSIZE; |
291 | ||
e6278d92 | 292 | return hlen; |
32bad7e3 | 293 | } |
294 | ||
295 | static int | |
296 | mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr) | |
297 | { | |
e6278d92 PB |
298 | struct ieee802154_hdr hdr; |
299 | struct ieee802154_addr *addr = (struct ieee802154_addr *)haddr; | |
32bad7e3 | 300 | |
e6278d92 PB |
301 | if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) { |
302 | pr_debug("malformed packet\n"); | |
303 | return 0; | |
32bad7e3 | 304 | } |
305 | ||
e6278d92 PB |
306 | *addr = hdr.source; |
307 | return sizeof(*addr); | |
32bad7e3 | 308 | } |
309 | ||
310 | static netdev_tx_t | |
311 | mac802154_wpan_xmit(struct sk_buff *skb, struct net_device *dev) | |
312 | { | |
036562f9 | 313 | struct ieee802154_sub_if_data *sdata; |
32bad7e3 | 314 | u8 chan, page; |
f30be4d5 | 315 | int rc; |
32bad7e3 | 316 | |
036562f9 | 317 | sdata = netdev_priv(dev); |
32bad7e3 | 318 | |
036562f9 AA |
319 | spin_lock_bh(&sdata->mib_lock); |
320 | chan = sdata->chan; | |
321 | page = sdata->page; | |
322 | spin_unlock_bh(&sdata->mib_lock); | |
32bad7e3 | 323 | |
324 | if (chan == MAC802154_CHAN_NONE || | |
325 | page >= WPAN_NUM_PAGES || | |
fcefbe9f AO |
326 | chan >= WPAN_NUM_CHANNELS) { |
327 | kfree_skb(skb); | |
32bad7e3 | 328 | return NETDEV_TX_OK; |
fcefbe9f | 329 | } |
32bad7e3 | 330 | |
036562f9 | 331 | rc = mac802154_llsec_encrypt(&sdata->sec, skb); |
f30be4d5 PB |
332 | if (rc) { |
333 | pr_warn("encryption failed: %i\n", rc); | |
334 | kfree_skb(skb); | |
335 | return NETDEV_TX_OK; | |
336 | } | |
337 | ||
32bad7e3 | 338 | skb->skb_iif = dev->ifindex; |
339 | dev->stats.tx_packets++; | |
340 | dev->stats.tx_bytes += skb->len; | |
341 | ||
04e850fe | 342 | return mac802154_tx(sdata->local, skb, page, chan); |
32bad7e3 | 343 | } |
344 | ||
345 | static struct header_ops mac802154_header_ops = { | |
346 | .create = mac802154_header_create, | |
347 | .parse = mac802154_header_parse, | |
348 | }; | |
349 | ||
350 | static const struct net_device_ops mac802154_wpan_ops = { | |
e462ded6 | 351 | .ndo_open = mac802154_wpan_open, |
32bad7e3 | 352 | .ndo_stop = mac802154_slave_close, |
353 | .ndo_start_xmit = mac802154_wpan_xmit, | |
354 | .ndo_do_ioctl = mac802154_wpan_ioctl, | |
355 | .ndo_set_mac_address = mac802154_wpan_mac_addr, | |
356 | }; | |
357 | ||
f30be4d5 PB |
358 | static void mac802154_wpan_free(struct net_device *dev) |
359 | { | |
036562f9 | 360 | struct ieee802154_sub_if_data *sdata = netdev_priv(dev); |
f30be4d5 | 361 | |
036562f9 | 362 | mac802154_llsec_destroy(&sdata->sec); |
f30be4d5 PB |
363 | |
364 | free_netdev(dev); | |
365 | } | |
366 | ||
32bad7e3 | 367 | void mac802154_wpan_setup(struct net_device *dev) |
368 | { | |
036562f9 | 369 | struct ieee802154_sub_if_data *sdata; |
32bad7e3 | 370 | |
371 | dev->addr_len = IEEE802154_ADDR_LEN; | |
372 | memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN); | |
373 | ||
374 | dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN; | |
375 | dev->header_ops = &mac802154_header_ops; | |
f30be4d5 | 376 | dev->needed_tailroom = 2 + 16; /* FCS + MIC */ |
32bad7e3 | 377 | dev->mtu = IEEE802154_MTU; |
e937f583 | 378 | dev->tx_queue_len = 300; |
32bad7e3 | 379 | dev->type = ARPHRD_IEEE802154; |
380 | dev->flags = IFF_NOARP | IFF_BROADCAST; | |
381 | dev->watchdog_timeo = 0; | |
382 | ||
f30be4d5 | 383 | dev->destructor = mac802154_wpan_free; |
32bad7e3 | 384 | dev->netdev_ops = &mac802154_wpan_ops; |
385 | dev->ml_priv = &mac802154_mlme_wpan; | |
386 | ||
036562f9 AA |
387 | sdata = netdev_priv(dev); |
388 | sdata->type = IEEE802154_DEV_WPAN; | |
32bad7e3 | 389 | |
036562f9 AA |
390 | sdata->chan = MAC802154_CHAN_NONE; |
391 | sdata->page = 0; | |
32bad7e3 | 392 | |
036562f9 AA |
393 | spin_lock_init(&sdata->mib_lock); |
394 | mutex_init(&sdata->sec_mtx); | |
32bad7e3 | 395 | |
036562f9 AA |
396 | get_random_bytes(&sdata->bsn, 1); |
397 | get_random_bytes(&sdata->dsn, 1); | |
32bad7e3 | 398 | |
e462ded6 | 399 | /* defaults per 802.15.4-2011 */ |
036562f9 AA |
400 | sdata->mac_params.min_be = 3; |
401 | sdata->mac_params.max_be = 5; | |
402 | sdata->mac_params.csma_retries = 4; | |
403 | /* for compatibility, actual default is 3 */ | |
404 | sdata->mac_params.frame_retries = -1; | |
e462ded6 | 405 | |
036562f9 AA |
406 | sdata->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST); |
407 | sdata->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST); | |
f30be4d5 | 408 | |
036562f9 | 409 | mac802154_llsec_init(&sdata->sec); |
32bad7e3 | 410 | } |
411 | ||
412 | static int mac802154_process_data(struct net_device *dev, struct sk_buff *skb) | |
413 | { | |
5ff3fec6 | 414 | return netif_rx_ni(skb); |
32bad7e3 | 415 | } |
416 | ||
417 | static int | |
036562f9 | 418 | mac802154_subif_frame(struct ieee802154_sub_if_data *sdata, struct sk_buff *skb, |
f30be4d5 | 419 | const struct ieee802154_hdr *hdr) |
32bad7e3 | 420 | { |
ae531b94 | 421 | __le16 span, sshort; |
f30be4d5 | 422 | int rc; |
b70ab2e8 | 423 | |
32bad7e3 | 424 | pr_debug("getting packet via slave interface %s\n", sdata->dev->name); |
425 | ||
426 | spin_lock_bh(&sdata->mib_lock); | |
427 | ||
ae531b94 PB |
428 | span = sdata->pan_id; |
429 | sshort = sdata->short_addr; | |
b70ab2e8 | 430 | |
ae531b94 | 431 | switch (mac_cb(skb)->dest.mode) { |
32bad7e3 | 432 | case IEEE802154_ADDR_NONE: |
ae531b94 | 433 | if (mac_cb(skb)->dest.mode != IEEE802154_ADDR_NONE) |
32bad7e3 | 434 | /* FIXME: check if we are PAN coordinator */ |
435 | skb->pkt_type = PACKET_OTHERHOST; | |
436 | else | |
437 | /* ACK comes with both addresses empty */ | |
438 | skb->pkt_type = PACKET_HOST; | |
439 | break; | |
440 | case IEEE802154_ADDR_LONG: | |
ae531b94 PB |
441 | if (mac_cb(skb)->dest.pan_id != span && |
442 | mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST)) | |
32bad7e3 | 443 | skb->pkt_type = PACKET_OTHERHOST; |
ae531b94 | 444 | else if (mac_cb(skb)->dest.extended_addr == sdata->extended_addr) |
32bad7e3 | 445 | skb->pkt_type = PACKET_HOST; |
446 | else | |
447 | skb->pkt_type = PACKET_OTHERHOST; | |
448 | break; | |
449 | case IEEE802154_ADDR_SHORT: | |
ae531b94 PB |
450 | if (mac_cb(skb)->dest.pan_id != span && |
451 | mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST)) | |
32bad7e3 | 452 | skb->pkt_type = PACKET_OTHERHOST; |
ae531b94 | 453 | else if (mac_cb(skb)->dest.short_addr == sshort) |
32bad7e3 | 454 | skb->pkt_type = PACKET_HOST; |
ae531b94 PB |
455 | else if (mac_cb(skb)->dest.short_addr == |
456 | cpu_to_le16(IEEE802154_ADDR_BROADCAST)) | |
32bad7e3 | 457 | skb->pkt_type = PACKET_BROADCAST; |
458 | else | |
459 | skb->pkt_type = PACKET_OTHERHOST; | |
460 | break; | |
461 | default: | |
6e361d6f MT |
462 | spin_unlock_bh(&sdata->mib_lock); |
463 | pr_debug("invalid dest mode\n"); | |
464 | kfree_skb(skb); | |
465 | return NET_RX_DROP; | |
32bad7e3 | 466 | } |
467 | ||
468 | spin_unlock_bh(&sdata->mib_lock); | |
469 | ||
470 | skb->dev = sdata->dev; | |
471 | ||
f30be4d5 PB |
472 | rc = mac802154_llsec_decrypt(&sdata->sec, skb); |
473 | if (rc) { | |
474 | pr_debug("decryption failed: %i\n", rc); | |
b288a496 | 475 | goto fail; |
f30be4d5 PB |
476 | } |
477 | ||
32bad7e3 | 478 | sdata->dev->stats.rx_packets++; |
479 | sdata->dev->stats.rx_bytes += skb->len; | |
480 | ||
32edc40a | 481 | switch (mac_cb(skb)->type) { |
32bad7e3 | 482 | case IEEE802154_FC_TYPE_DATA: |
483 | return mac802154_process_data(sdata->dev, skb); | |
484 | default: | |
2cc33c7e | 485 | pr_warn("ieee802154: bad frame received (type = %d)\n", |
32edc40a | 486 | mac_cb(skb)->type); |
b288a496 | 487 | goto fail; |
32bad7e3 | 488 | } |
b288a496 VB |
489 | |
490 | fail: | |
491 | kfree_skb(skb); | |
492 | return NET_RX_DROP; | |
32bad7e3 | 493 | } |
494 | ||
e6278d92 PB |
495 | static void mac802154_print_addr(const char *name, |
496 | const struct ieee802154_addr *addr) | |
32bad7e3 | 497 | { |
e6278d92 PB |
498 | if (addr->mode == IEEE802154_ADDR_NONE) |
499 | pr_debug("%s not present\n", name); | |
32bad7e3 | 500 | |
e6278d92 PB |
501 | pr_debug("%s PAN ID: %04x\n", name, le16_to_cpu(addr->pan_id)); |
502 | if (addr->mode == IEEE802154_ADDR_SHORT) { | |
503 | pr_debug("%s is short: %04x\n", name, | |
504 | le16_to_cpu(addr->short_addr)); | |
505 | } else { | |
506 | u64 hw = swab64((__force u64) addr->extended_addr); | |
32bad7e3 | 507 | |
e6278d92 PB |
508 | pr_debug("%s is hardware: %8phC\n", name, &hw); |
509 | } | |
510 | } | |
32bad7e3 | 511 | |
f30be4d5 PB |
512 | static int mac802154_parse_frame_start(struct sk_buff *skb, |
513 | struct ieee802154_hdr *hdr) | |
e6278d92 | 514 | { |
e6278d92 | 515 | int hlen; |
32edc40a | 516 | struct ieee802154_mac_cb *cb = mac_cb_init(skb); |
32bad7e3 | 517 | |
f30be4d5 | 518 | hlen = ieee802154_hdr_pull(skb, hdr); |
e6278d92 PB |
519 | if (hlen < 0) |
520 | return -EINVAL; | |
32bad7e3 | 521 | |
e6278d92 | 522 | skb->mac_len = hlen; |
32bad7e3 | 523 | |
f30be4d5 PB |
524 | pr_debug("fc: %04x dsn: %02x\n", le16_to_cpup((__le16 *)&hdr->fc), |
525 | hdr->seq); | |
32bad7e3 | 526 | |
f30be4d5 PB |
527 | cb->type = hdr->fc.type; |
528 | cb->ackreq = hdr->fc.ack_request; | |
529 | cb->secen = hdr->fc.security_enabled; | |
32bad7e3 | 530 | |
f30be4d5 PB |
531 | mac802154_print_addr("destination", &hdr->dest); |
532 | mac802154_print_addr("source", &hdr->source); | |
32bad7e3 | 533 | |
f30be4d5 PB |
534 | cb->source = hdr->source; |
535 | cb->dest = hdr->dest; | |
ae531b94 | 536 | |
f30be4d5 | 537 | if (hdr->fc.security_enabled) { |
e6278d92 | 538 | u64 key; |
32bad7e3 | 539 | |
f30be4d5 | 540 | pr_debug("seclevel %i\n", hdr->sec.level); |
32bad7e3 | 541 | |
f30be4d5 | 542 | switch (hdr->sec.key_id_mode) { |
e6278d92 PB |
543 | case IEEE802154_SCF_KEY_IMPLICIT: |
544 | pr_debug("implicit key\n"); | |
545 | break; | |
32bad7e3 | 546 | |
e6278d92 | 547 | case IEEE802154_SCF_KEY_INDEX: |
f30be4d5 | 548 | pr_debug("key %02x\n", hdr->sec.key_id); |
e6278d92 | 549 | break; |
32bad7e3 | 550 | |
e6278d92 PB |
551 | case IEEE802154_SCF_KEY_SHORT_INDEX: |
552 | pr_debug("key %04x:%04x %02x\n", | |
f30be4d5 PB |
553 | le32_to_cpu(hdr->sec.short_src) >> 16, |
554 | le32_to_cpu(hdr->sec.short_src) & 0xffff, | |
555 | hdr->sec.key_id); | |
e6278d92 | 556 | break; |
32bad7e3 | 557 | |
e6278d92 | 558 | case IEEE802154_SCF_KEY_HW_INDEX: |
f30be4d5 | 559 | key = swab64((__force u64) hdr->sec.extended_src); |
e6278d92 | 560 | pr_debug("key source %8phC %02x\n", &key, |
f30be4d5 | 561 | hdr->sec.key_id); |
e6278d92 | 562 | break; |
32bad7e3 | 563 | } |
564 | } | |
565 | ||
566 | return 0; | |
32bad7e3 | 567 | } |
568 | ||
a5e1ec53 | 569 | void mac802154_wpans_rx(struct ieee802154_local *local, struct sk_buff *skb) |
32bad7e3 | 570 | { |
571 | int ret; | |
036562f9 | 572 | struct ieee802154_sub_if_data *sdata; |
f30be4d5 | 573 | struct ieee802154_hdr hdr; |
32bad7e3 | 574 | |
f30be4d5 | 575 | ret = mac802154_parse_frame_start(skb, &hdr); |
32bad7e3 | 576 | if (ret) { |
577 | pr_debug("got invalid frame\n"); | |
7629d1ea | 578 | kfree_skb(skb); |
32bad7e3 | 579 | return; |
580 | } | |
581 | ||
582 | rcu_read_lock(); | |
d98be45b | 583 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
2d3b5b0a PB |
584 | if (sdata->type != IEEE802154_DEV_WPAN || |
585 | !netif_running(sdata->dev)) | |
32bad7e3 | 586 | continue; |
587 | ||
2d3b5b0a PB |
588 | mac802154_subif_frame(sdata, skb, &hdr); |
589 | skb = NULL; | |
590 | break; | |
32bad7e3 | 591 | } |
592 | rcu_read_unlock(); | |
2d3b5b0a PB |
593 | |
594 | if (skb) | |
595 | kfree_skb(skb); | |
32bad7e3 | 596 | } |