1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Netlink interface for IEEE 802.15.4 stack
4 *
5 * Copyright 2007, 2008 Siemens AG
6 *
7 * Written by:
8 * Sergey Lapin <slapin@ossfans.org>
9 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
10 * Maxim Osipov <maxim.osipov@siemens.com>
11 */
12
13 #include <linux/gfp.h>
14 #include <linux/kernel.h>
15 #include <linux/if_arp.h>
16 #include <linux/netdevice.h>
17 #include <linux/ieee802154.h>
18 #include <net/netlink.h>
19 #include <net/genetlink.h>
20 #include <net/sock.h>
21 #include <linux/nl802154.h>
22 #include <linux/export.h>
23 #include <net/af_ieee802154.h>
24 #include <net/ieee802154_netdev.h>
25 #include <net/cfg802154.h>
26
27 #include "ieee802154.h"
28
nla_put_hwaddr(struct sk_buff * msg,int type,__le64 hwaddr,int padattr)29 static int nla_put_hwaddr(struct sk_buff *msg, int type, __le64 hwaddr,
30 int padattr)
31 {
32 return nla_put_u64_64bit(msg, type, swab64((__force u64)hwaddr),
33 padattr);
34 }
35
nla_get_hwaddr(const struct nlattr * nla)36 static __le64 nla_get_hwaddr(const struct nlattr *nla)
37 {
38 return ieee802154_devaddr_from_raw(nla_data(nla));
39 }
40
nla_put_shortaddr(struct sk_buff * msg,int type,__le16 addr)41 static int nla_put_shortaddr(struct sk_buff *msg, int type, __le16 addr)
42 {
43 return nla_put_u16(msg, type, le16_to_cpu(addr));
44 }
45
nla_get_shortaddr(const struct nlattr * nla)46 static __le16 nla_get_shortaddr(const struct nlattr *nla)
47 {
48 return cpu_to_le16(nla_get_u16(nla));
49 }
50
ieee802154_nl_start_confirm(struct net_device * dev,u8 status)51 static int ieee802154_nl_start_confirm(struct net_device *dev, u8 status)
52 {
53 struct sk_buff *msg;
54
55 pr_debug("%s\n", __func__);
56
57 msg = ieee802154_nl_create(0, IEEE802154_START_CONF);
58 if (!msg)
59 return -ENOBUFS;
60
61 if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
62 nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
63 nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
64 dev->dev_addr) ||
65 nla_put_u8(msg, IEEE802154_ATTR_STATUS, status))
66 goto nla_put_failure;
67 return ieee802154_nl_mcast(msg, IEEE802154_COORD_MCGRP);
68
69 nla_put_failure:
70 nlmsg_free(msg);
71 return -ENOBUFS;
72 }
73
ieee802154_nl_fill_iface(struct sk_buff * msg,u32 portid,u32 seq,int flags,struct net_device * dev)74 static int ieee802154_nl_fill_iface(struct sk_buff *msg, u32 portid,
75 u32 seq, int flags, struct net_device *dev)
76 {
77 void *hdr;
78 struct wpan_phy *phy;
79 struct ieee802154_mlme_ops *ops;
80 __le16 short_addr, pan_id;
81
82 pr_debug("%s\n", __func__);
83
84 hdr = genlmsg_put(msg, 0, seq, &nl802154_family, flags,
85 IEEE802154_LIST_IFACE);
86 if (!hdr)
87 goto out;
88
89 ops = ieee802154_mlme_ops(dev);
90 phy = dev->ieee802154_ptr->wpan_phy;
91 BUG_ON(!phy);
92 get_device(&phy->dev);
93
94 rtnl_lock();
95 short_addr = dev->ieee802154_ptr->short_addr;
96 pan_id = dev->ieee802154_ptr->pan_id;
97 rtnl_unlock();
98
99 if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
100 nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) ||
101 nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
102 nla_put(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
103 dev->dev_addr) ||
104 nla_put_shortaddr(msg, IEEE802154_ATTR_SHORT_ADDR, short_addr) ||
105 nla_put_shortaddr(msg, IEEE802154_ATTR_PAN_ID, pan_id))
106 goto nla_put_failure;
107
108 if (ops->get_mac_params) {
109 struct ieee802154_mac_params params;
110
111 rtnl_lock();
112 ops->get_mac_params(dev, ¶ms);
113 rtnl_unlock();
114
115 if (nla_put_s8(msg, IEEE802154_ATTR_TXPOWER,
116 params.transmit_power / 100) ||
117 nla_put_u8(msg, IEEE802154_ATTR_LBT_ENABLED, params.lbt) ||
118 nla_put_u8(msg, IEEE802154_ATTR_CCA_MODE,
119 params.cca.mode) ||
120 nla_put_s32(msg, IEEE802154_ATTR_CCA_ED_LEVEL,
121 params.cca_ed_level / 100) ||
122 nla_put_u8(msg, IEEE802154_ATTR_CSMA_RETRIES,
123 params.csma_retries) ||
124 nla_put_u8(msg, IEEE802154_ATTR_CSMA_MIN_BE,
125 params.min_be) ||
126 nla_put_u8(msg, IEEE802154_ATTR_CSMA_MAX_BE,
127 params.max_be) ||
128 nla_put_s8(msg, IEEE802154_ATTR_FRAME_RETRIES,
129 params.frame_retries))
130 goto nla_put_failure;
131 }
132
133 wpan_phy_put(phy);
134 genlmsg_end(msg, hdr);
135 return 0;
136
137 nla_put_failure:
138 wpan_phy_put(phy);
139 genlmsg_cancel(msg, hdr);
140 out:
141 return -EMSGSIZE;
142 }
143
144 /* Requests from userspace */
ieee802154_nl_get_dev(struct genl_info * info)145 static struct net_device *ieee802154_nl_get_dev(struct genl_info *info)
146 {
147 struct net_device *dev;
148
149 if (info->attrs[IEEE802154_ATTR_DEV_NAME]) {
150 char name[IFNAMSIZ + 1];
151
152 nla_strlcpy(name, info->attrs[IEEE802154_ATTR_DEV_NAME],
153 sizeof(name));
154 dev = dev_get_by_name(&init_net, name);
155 } else if (info->attrs[IEEE802154_ATTR_DEV_INDEX]) {
156 dev = dev_get_by_index(&init_net,
157 nla_get_u32(info->attrs[IEEE802154_ATTR_DEV_INDEX]));
158 } else {
159 return NULL;
160 }
161
162 if (!dev)
163 return NULL;
164
165 if (dev->type != ARPHRD_IEEE802154) {
166 dev_put(dev);
167 return NULL;
168 }
169
170 return dev;
171 }
172
ieee802154_associate_req(struct sk_buff * skb,struct genl_info * info)173 int ieee802154_associate_req(struct sk_buff *skb, struct genl_info *info)
174 {
175 struct net_device *dev;
176 struct ieee802154_addr addr;
177 u8 page;
178 int ret = -EOPNOTSUPP;
179
180 if (!info->attrs[IEEE802154_ATTR_CHANNEL] ||
181 !info->attrs[IEEE802154_ATTR_COORD_PAN_ID] ||
182 (!info->attrs[IEEE802154_ATTR_COORD_HW_ADDR] &&
183 !info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]) ||
184 !info->attrs[IEEE802154_ATTR_CAPABILITY])
185 return -EINVAL;
186
187 dev = ieee802154_nl_get_dev(info);
188 if (!dev)
189 return -ENODEV;
190 if (!ieee802154_mlme_ops(dev)->assoc_req)
191 goto out;
192
193 if (info->attrs[IEEE802154_ATTR_COORD_HW_ADDR]) {
194 addr.mode = IEEE802154_ADDR_LONG;
195 addr.extended_addr = nla_get_hwaddr(
196 info->attrs[IEEE802154_ATTR_COORD_HW_ADDR]);
197 } else {
198 addr.mode = IEEE802154_ADDR_SHORT;
199 addr.short_addr = nla_get_shortaddr(
200 info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]);
201 }
202 addr.pan_id = nla_get_shortaddr(
203 info->attrs[IEEE802154_ATTR_COORD_PAN_ID]);
204
205 if (info->attrs[IEEE802154_ATTR_PAGE])
206 page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
207 else
208 page = 0;
209
210 ret = ieee802154_mlme_ops(dev)->assoc_req(dev, &addr,
211 nla_get_u8(info->attrs[IEEE802154_ATTR_CHANNEL]),
212 page,
213 nla_get_u8(info->attrs[IEEE802154_ATTR_CAPABILITY]));
214
215 out:
216 dev_put(dev);
217 return ret;
218 }
219
ieee802154_associate_resp(struct sk_buff * skb,struct genl_info * info)220 int ieee802154_associate_resp(struct sk_buff *skb, struct genl_info *info)
221 {
222 struct net_device *dev;
223 struct ieee802154_addr addr;
224 int ret = -EOPNOTSUPP;
225
226 if (!info->attrs[IEEE802154_ATTR_STATUS] ||
227 !info->attrs[IEEE802154_ATTR_DEST_HW_ADDR] ||
228 !info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR])
229 return -EINVAL;
230
231 dev = ieee802154_nl_get_dev(info);
232 if (!dev)
233 return -ENODEV;
234 if (!ieee802154_mlme_ops(dev)->assoc_resp)
235 goto out;
236
237 addr.mode = IEEE802154_ADDR_LONG;
238 addr.extended_addr = nla_get_hwaddr(
239 info->attrs[IEEE802154_ATTR_DEST_HW_ADDR]);
240 rtnl_lock();
241 addr.pan_id = dev->ieee802154_ptr->pan_id;
242 rtnl_unlock();
243
244 ret = ieee802154_mlme_ops(dev)->assoc_resp(dev, &addr,
245 nla_get_shortaddr(info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]),
246 nla_get_u8(info->attrs[IEEE802154_ATTR_STATUS]));
247
248 out:
249 dev_put(dev);
250 return ret;
251 }
252
ieee802154_disassociate_req(struct sk_buff * skb,struct genl_info * info)253 int ieee802154_disassociate_req(struct sk_buff *skb, struct genl_info *info)
254 {
255 struct net_device *dev;
256 struct ieee802154_addr addr;
257 int ret = -EOPNOTSUPP;
258
259 if ((!info->attrs[IEEE802154_ATTR_DEST_HW_ADDR] &&
260 !info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]) ||
261 !info->attrs[IEEE802154_ATTR_REASON])
262 return -EINVAL;
263
264 dev = ieee802154_nl_get_dev(info);
265 if (!dev)
266 return -ENODEV;
267 if (!ieee802154_mlme_ops(dev)->disassoc_req)
268 goto out;
269
270 if (info->attrs[IEEE802154_ATTR_DEST_HW_ADDR]) {
271 addr.mode = IEEE802154_ADDR_LONG;
272 addr.extended_addr = nla_get_hwaddr(
273 info->attrs[IEEE802154_ATTR_DEST_HW_ADDR]);
274 } else {
275 addr.mode = IEEE802154_ADDR_SHORT;
276 addr.short_addr = nla_get_shortaddr(
277 info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]);
278 }
279 rtnl_lock();
280 addr.pan_id = dev->ieee802154_ptr->pan_id;
281 rtnl_unlock();
282
283 ret = ieee802154_mlme_ops(dev)->disassoc_req(dev, &addr,
284 nla_get_u8(info->attrs[IEEE802154_ATTR_REASON]));
285
286 out:
287 dev_put(dev);
288 return ret;
289 }
290
291 /* PANid, channel, beacon_order = 15, superframe_order = 15,
292 * PAN_coordinator, battery_life_extension = 0,
293 * coord_realignment = 0, security_enable = 0
294 */
ieee802154_start_req(struct sk_buff * skb,struct genl_info * info)295 int ieee802154_start_req(struct sk_buff *skb, struct genl_info *info)
296 {
297 struct net_device *dev;
298 struct ieee802154_addr addr;
299
300 u8 channel, bcn_ord, sf_ord;
301 u8 page;
302 int pan_coord, blx, coord_realign;
303 int ret = -EBUSY;
304
305 if (!info->attrs[IEEE802154_ATTR_COORD_PAN_ID] ||
306 !info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR] ||
307 !info->attrs[IEEE802154_ATTR_CHANNEL] ||
308 !info->attrs[IEEE802154_ATTR_BCN_ORD] ||
309 !info->attrs[IEEE802154_ATTR_SF_ORD] ||
310 !info->attrs[IEEE802154_ATTR_PAN_COORD] ||
311 !info->attrs[IEEE802154_ATTR_BAT_EXT] ||
312 !info->attrs[IEEE802154_ATTR_COORD_REALIGN]
313 )
314 return -EINVAL;
315
316 dev = ieee802154_nl_get_dev(info);
317 if (!dev)
318 return -ENODEV;
319
320 if (netif_running(dev))
321 goto out;
322
323 if (!ieee802154_mlme_ops(dev)->start_req) {
324 ret = -EOPNOTSUPP;
325 goto out;
326 }
327
328 addr.mode = IEEE802154_ADDR_SHORT;
329 addr.short_addr = nla_get_shortaddr(
330 info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]);
331 addr.pan_id = nla_get_shortaddr(
332 info->attrs[IEEE802154_ATTR_COORD_PAN_ID]);
333
334 channel = nla_get_u8(info->attrs[IEEE802154_ATTR_CHANNEL]);
335 bcn_ord = nla_get_u8(info->attrs[IEEE802154_ATTR_BCN_ORD]);
336 sf_ord = nla_get_u8(info->attrs[IEEE802154_ATTR_SF_ORD]);
337 pan_coord = nla_get_u8(info->attrs[IEEE802154_ATTR_PAN_COORD]);
338 blx = nla_get_u8(info->attrs[IEEE802154_ATTR_BAT_EXT]);
339 coord_realign = nla_get_u8(info->attrs[IEEE802154_ATTR_COORD_REALIGN]);
340
341 if (info->attrs[IEEE802154_ATTR_PAGE])
342 page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
343 else
344 page = 0;
345
346 if (addr.short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST)) {
347 ieee802154_nl_start_confirm(dev, IEEE802154_NO_SHORT_ADDRESS);
348 dev_put(dev);
349 return -EINVAL;
350 }
351
352 rtnl_lock();
353 ret = ieee802154_mlme_ops(dev)->start_req(dev, &addr, channel, page,
354 bcn_ord, sf_ord, pan_coord, blx, coord_realign);
355 rtnl_unlock();
356
357 /* FIXME: add validation for unused parameters to be sane
358 * for SoftMAC
359 */
360 ieee802154_nl_start_confirm(dev, IEEE802154_SUCCESS);
361
362 out:
363 dev_put(dev);
364 return ret;
365 }
366
ieee802154_scan_req(struct sk_buff * skb,struct genl_info * info)367 int ieee802154_scan_req(struct sk_buff *skb, struct genl_info *info)
368 {
369 struct net_device *dev;
370 int ret = -EOPNOTSUPP;
371 u8 type;
372 u32 channels;
373 u8 duration;
374 u8 page;
375
376 if (!info->attrs[IEEE802154_ATTR_SCAN_TYPE] ||
377 !info->attrs[IEEE802154_ATTR_CHANNELS] ||
378 !info->attrs[IEEE802154_ATTR_DURATION])
379 return -EINVAL;
380
381 dev = ieee802154_nl_get_dev(info);
382 if (!dev)
383 return -ENODEV;
384 if (!ieee802154_mlme_ops(dev)->scan_req)
385 goto out;
386
387 type = nla_get_u8(info->attrs[IEEE802154_ATTR_SCAN_TYPE]);
388 channels = nla_get_u32(info->attrs[IEEE802154_ATTR_CHANNELS]);
389 duration = nla_get_u8(info->attrs[IEEE802154_ATTR_DURATION]);
390
391 if (info->attrs[IEEE802154_ATTR_PAGE])
392 page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
393 else
394 page = 0;
395
396 ret = ieee802154_mlme_ops(dev)->scan_req(dev, type, channels,
397 page, duration);
398
399 out:
400 dev_put(dev);
401 return ret;
402 }
403
ieee802154_list_iface(struct sk_buff * skb,struct genl_info * info)404 int ieee802154_list_iface(struct sk_buff *skb, struct genl_info *info)
405 {
406 /* Request for interface name, index, type, IEEE address,
407 * PAN Id, short address
408 */
409 struct sk_buff *msg;
410 struct net_device *dev = NULL;
411 int rc = -ENOBUFS;
412
413 pr_debug("%s\n", __func__);
414
415 dev = ieee802154_nl_get_dev(info);
416 if (!dev)
417 return -ENODEV;
418
419 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
420 if (!msg)
421 goto out_dev;
422
423 rc = ieee802154_nl_fill_iface(msg, info->snd_portid, info->snd_seq,
424 0, dev);
425 if (rc < 0)
426 goto out_free;
427
428 dev_put(dev);
429
430 return genlmsg_reply(msg, info);
431 out_free:
432 nlmsg_free(msg);
433 out_dev:
434 dev_put(dev);
435 return rc;
436 }
437
ieee802154_dump_iface(struct sk_buff * skb,struct netlink_callback * cb)438 int ieee802154_dump_iface(struct sk_buff *skb, struct netlink_callback *cb)
439 {
440 struct net *net = sock_net(skb->sk);
441 struct net_device *dev;
442 int idx;
443 int s_idx = cb->args[0];
444
445 pr_debug("%s\n", __func__);
446
447 idx = 0;
448 for_each_netdev(net, dev) {
449 if (idx < s_idx || dev->type != ARPHRD_IEEE802154)
450 goto cont;
451
452 if (ieee802154_nl_fill_iface(skb, NETLINK_CB(cb->skb).portid,
453 cb->nlh->nlmsg_seq,
454 NLM_F_MULTI, dev) < 0)
455 break;
456 cont:
457 idx++;
458 }
459 cb->args[0] = idx;
460
461 return skb->len;
462 }
463
ieee802154_set_macparams(struct sk_buff * skb,struct genl_info * info)464 int ieee802154_set_macparams(struct sk_buff *skb, struct genl_info *info)
465 {
466 struct net_device *dev = NULL;
467 struct ieee802154_mlme_ops *ops;
468 struct ieee802154_mac_params params;
469 struct wpan_phy *phy;
470 int rc = -EINVAL;
471
472 pr_debug("%s\n", __func__);
473
474 dev = ieee802154_nl_get_dev(info);
475 if (!dev)
476 return -ENODEV;
477
478 ops = ieee802154_mlme_ops(dev);
479
480 if (!ops->get_mac_params || !ops->set_mac_params) {
481 rc = -EOPNOTSUPP;
482 goto out;
483 }
484
485 if (netif_running(dev)) {
486 rc = -EBUSY;
487 goto out;
488 }
489
490 if (!info->attrs[IEEE802154_ATTR_LBT_ENABLED] &&
491 !info->attrs[IEEE802154_ATTR_CCA_MODE] &&
492 !info->attrs[IEEE802154_ATTR_CCA_ED_LEVEL] &&
493 !info->attrs[IEEE802154_ATTR_CSMA_RETRIES] &&
494 !info->attrs[IEEE802154_ATTR_CSMA_MIN_BE] &&
495 !info->attrs[IEEE802154_ATTR_CSMA_MAX_BE] &&
496 !info->attrs[IEEE802154_ATTR_FRAME_RETRIES])
497 goto out;
498
499 phy = dev->ieee802154_ptr->wpan_phy;
500 get_device(&phy->dev);
501
502 rtnl_lock();
503 ops->get_mac_params(dev, ¶ms);
504
505 if (info->attrs[IEEE802154_ATTR_TXPOWER])
506 params.transmit_power = nla_get_s8(info->attrs[IEEE802154_ATTR_TXPOWER]) * 100;
507
508 if (info->attrs[IEEE802154_ATTR_LBT_ENABLED])
509 params.lbt = nla_get_u8(info->attrs[IEEE802154_ATTR_LBT_ENABLED]);
510
511 if (info->attrs[IEEE802154_ATTR_CCA_MODE])
512 params.cca.mode = nla_get_u8(info->attrs[IEEE802154_ATTR_CCA_MODE]);
513
514 if (info->attrs[IEEE802154_ATTR_CCA_ED_LEVEL])
515 params.cca_ed_level = nla_get_s32(info->attrs[IEEE802154_ATTR_CCA_ED_LEVEL]) * 100;
516
517 if (info->attrs[IEEE802154_ATTR_CSMA_RETRIES])
518 params.csma_retries = nla_get_u8(info->attrs[IEEE802154_ATTR_CSMA_RETRIES]);
519
520 if (info->attrs[IEEE802154_ATTR_CSMA_MIN_BE])
521 params.min_be = nla_get_u8(info->attrs[IEEE802154_ATTR_CSMA_MIN_BE]);
522
523 if (info->attrs[IEEE802154_ATTR_CSMA_MAX_BE])
524 params.max_be = nla_get_u8(info->attrs[IEEE802154_ATTR_CSMA_MAX_BE]);
525
526 if (info->attrs[IEEE802154_ATTR_FRAME_RETRIES])
527 params.frame_retries = nla_get_s8(info->attrs[IEEE802154_ATTR_FRAME_RETRIES]);
528
529 rc = ops->set_mac_params(dev, ¶ms);
530 rtnl_unlock();
531
532 wpan_phy_put(phy);
533 dev_put(dev);
534
535 return 0;
536
537 out:
538 dev_put(dev);
539 return rc;
540 }
541
542 static int
ieee802154_llsec_parse_key_id(struct genl_info * info,struct ieee802154_llsec_key_id * desc)543 ieee802154_llsec_parse_key_id(struct genl_info *info,
544 struct ieee802154_llsec_key_id *desc)
545 {
546 memset(desc, 0, sizeof(*desc));
547
548 if (!info->attrs[IEEE802154_ATTR_LLSEC_KEY_MODE])
549 return -EINVAL;
550
551 desc->mode = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_KEY_MODE]);
552
553 if (desc->mode == IEEE802154_SCF_KEY_IMPLICIT) {
554 if (!info->attrs[IEEE802154_ATTR_PAN_ID] &&
555 !(info->attrs[IEEE802154_ATTR_SHORT_ADDR] ||
556 info->attrs[IEEE802154_ATTR_HW_ADDR]))
557 return -EINVAL;
558
559 desc->device_addr.pan_id = nla_get_shortaddr(info->attrs[IEEE802154_ATTR_PAN_ID]);
560
561 if (info->attrs[IEEE802154_ATTR_SHORT_ADDR]) {
562 desc->device_addr.mode = IEEE802154_ADDR_SHORT;
563 desc->device_addr.short_addr = nla_get_shortaddr(info->attrs[IEEE802154_ATTR_SHORT_ADDR]);
564 } else {
565 desc->device_addr.mode = IEEE802154_ADDR_LONG;
566 desc->device_addr.extended_addr = nla_get_hwaddr(info->attrs[IEEE802154_ATTR_HW_ADDR]);
567 }
568 }
569
570 if (desc->mode != IEEE802154_SCF_KEY_IMPLICIT &&
571 !info->attrs[IEEE802154_ATTR_LLSEC_KEY_ID])
572 return -EINVAL;
573
574 if (desc->mode == IEEE802154_SCF_KEY_SHORT_INDEX &&
575 !info->attrs[IEEE802154_ATTR_LLSEC_KEY_SOURCE_SHORT])
576 return -EINVAL;
577
578 if (desc->mode == IEEE802154_SCF_KEY_HW_INDEX &&
579 !info->attrs[IEEE802154_ATTR_LLSEC_KEY_SOURCE_EXTENDED])
580 return -EINVAL;
581
582 if (desc->mode != IEEE802154_SCF_KEY_IMPLICIT)
583 desc->id = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_KEY_ID]);
584
585 switch (desc->mode) {
586 case IEEE802154_SCF_KEY_SHORT_INDEX:
587 {
588 u32 source = nla_get_u32(info->attrs[IEEE802154_ATTR_LLSEC_KEY_SOURCE_SHORT]);
589
590 desc->short_source = cpu_to_le32(source);
591 break;
592 }
593 case IEEE802154_SCF_KEY_HW_INDEX:
594 desc->extended_source = nla_get_hwaddr(info->attrs[IEEE802154_ATTR_LLSEC_KEY_SOURCE_EXTENDED]);
595 break;
596 }
597
598 return 0;
599 }
600
601 static int
ieee802154_llsec_fill_key_id(struct sk_buff * msg,const struct ieee802154_llsec_key_id * desc)602 ieee802154_llsec_fill_key_id(struct sk_buff *msg,
603 const struct ieee802154_llsec_key_id *desc)
604 {
605 if (nla_put_u8(msg, IEEE802154_ATTR_LLSEC_KEY_MODE, desc->mode))
606 return -EMSGSIZE;
607
608 if (desc->mode == IEEE802154_SCF_KEY_IMPLICIT) {
609 if (nla_put_shortaddr(msg, IEEE802154_ATTR_PAN_ID,
610 desc->device_addr.pan_id))
611 return -EMSGSIZE;
612
613 if (desc->device_addr.mode == IEEE802154_ADDR_SHORT &&
614 nla_put_shortaddr(msg, IEEE802154_ATTR_SHORT_ADDR,
615 desc->device_addr.short_addr))
616 return -EMSGSIZE;
617
618 if (desc->device_addr.mode == IEEE802154_ADDR_LONG &&
619 nla_put_hwaddr(msg, IEEE802154_ATTR_HW_ADDR,
620 desc->device_addr.extended_addr,
621 IEEE802154_ATTR_PAD))
622 return -EMSGSIZE;
623 }
624
625 if (desc->mode != IEEE802154_SCF_KEY_IMPLICIT &&
626 nla_put_u8(msg, IEEE802154_ATTR_LLSEC_KEY_ID, desc->id))
627 return -EMSGSIZE;
628
629 if (desc->mode == IEEE802154_SCF_KEY_SHORT_INDEX &&
630 nla_put_u32(msg, IEEE802154_ATTR_LLSEC_KEY_SOURCE_SHORT,
631 le32_to_cpu(desc->short_source)))
632 return -EMSGSIZE;
633
634 if (desc->mode == IEEE802154_SCF_KEY_HW_INDEX &&
635 nla_put_hwaddr(msg, IEEE802154_ATTR_LLSEC_KEY_SOURCE_EXTENDED,
636 desc->extended_source, IEEE802154_ATTR_PAD))
637 return -EMSGSIZE;
638
639 return 0;
640 }
641
ieee802154_llsec_getparams(struct sk_buff * skb,struct genl_info * info)642 int ieee802154_llsec_getparams(struct sk_buff *skb, struct genl_info *info)
643 {
644 struct sk_buff *msg;
645 struct net_device *dev = NULL;
646 int rc = -ENOBUFS;
647 struct ieee802154_mlme_ops *ops;
648 void *hdr;
649 struct ieee802154_llsec_params params;
650
651 pr_debug("%s\n", __func__);
652
653 dev = ieee802154_nl_get_dev(info);
654 if (!dev)
655 return -ENODEV;
656
657 ops = ieee802154_mlme_ops(dev);
658 if (!ops->llsec) {
659 rc = -EOPNOTSUPP;
660 goto out_dev;
661 }
662
663 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
664 if (!msg)
665 goto out_dev;
666
667 hdr = genlmsg_put(msg, 0, info->snd_seq, &nl802154_family, 0,
668 IEEE802154_LLSEC_GETPARAMS);
669 if (!hdr)
670 goto out_free;
671
672 rc = ops->llsec->get_params(dev, ¶ms);
673 if (rc < 0)
674 goto out_free;
675
676 if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
677 nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
678 nla_put_u8(msg, IEEE802154_ATTR_LLSEC_ENABLED, params.enabled) ||
679 nla_put_u8(msg, IEEE802154_ATTR_LLSEC_SECLEVEL, params.out_level) ||
680 nla_put_u32(msg, IEEE802154_ATTR_LLSEC_FRAME_COUNTER,
681 be32_to_cpu(params.frame_counter)) ||
682 ieee802154_llsec_fill_key_id(msg, ¶ms.out_key))
683 goto out_free;
684
685 dev_put(dev);
686
687 return ieee802154_nl_reply(msg, info);
688 out_free:
689 nlmsg_free(msg);
690 out_dev:
691 dev_put(dev);
692 return rc;
693 }
694
ieee802154_llsec_setparams(struct sk_buff * skb,struct genl_info * info)695 int ieee802154_llsec_setparams(struct sk_buff *skb, struct genl_info *info)
696 {
697 struct net_device *dev = NULL;
698 int rc = -EINVAL;
699 struct ieee802154_mlme_ops *ops;
700 struct ieee802154_llsec_params params;
701 int changed = 0;
702
703 pr_debug("%s\n", __func__);
704
705 dev = ieee802154_nl_get_dev(info);
706 if (!dev)
707 return -ENODEV;
708
709 if (!info->attrs[IEEE802154_ATTR_LLSEC_ENABLED] &&
710 !info->attrs[IEEE802154_ATTR_LLSEC_KEY_MODE] &&
711 !info->attrs[IEEE802154_ATTR_LLSEC_SECLEVEL])
712 goto out;
713
714 ops = ieee802154_mlme_ops(dev);
715 if (!ops->llsec) {
716 rc = -EOPNOTSUPP;
717 goto out;
718 }
719
720 if (info->attrs[IEEE802154_ATTR_LLSEC_SECLEVEL] &&
721 nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_SECLEVEL]) > 7)
722 goto out;
723
724 if (info->attrs[IEEE802154_ATTR_LLSEC_ENABLED]) {
725 params.enabled = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_ENABLED]);
726 changed |= IEEE802154_LLSEC_PARAM_ENABLED;
727 }
728
729 if (info->attrs[IEEE802154_ATTR_LLSEC_KEY_MODE]) {
730 if (ieee802154_llsec_parse_key_id(info, ¶ms.out_key))
731 goto out;
732
733 changed |= IEEE802154_LLSEC_PARAM_OUT_KEY;
734 }
735
736 if (info->attrs[IEEE802154_ATTR_LLSEC_SECLEVEL]) {
737 params.out_level = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_SECLEVEL]);
738 changed |= IEEE802154_LLSEC_PARAM_OUT_LEVEL;
739 }
740
741 if (info->attrs[IEEE802154_ATTR_LLSEC_FRAME_COUNTER]) {
742 u32 fc = nla_get_u32(info->attrs[IEEE802154_ATTR_LLSEC_FRAME_COUNTER]);
743
744 params.frame_counter = cpu_to_be32(fc);
745 changed |= IEEE802154_LLSEC_PARAM_FRAME_COUNTER;
746 }
747
748 rc = ops->llsec->set_params(dev, ¶ms, changed);
749
750 dev_put(dev);
751
752 return rc;
753 out:
754 dev_put(dev);
755 return rc;
756 }
757
758 struct llsec_dump_data {
759 struct sk_buff *skb;
760 int s_idx, s_idx2;
761 int portid;
762 int nlmsg_seq;
763 struct net_device *dev;
764 struct ieee802154_mlme_ops *ops;
765 struct ieee802154_llsec_table *table;
766 };
767
768 static int
ieee802154_llsec_dump_table(struct sk_buff * skb,struct netlink_callback * cb,int (* step)(struct llsec_dump_data *))769 ieee802154_llsec_dump_table(struct sk_buff *skb, struct netlink_callback *cb,
770 int (*step)(struct llsec_dump_data *))
771 {
772 struct net *net = sock_net(skb->sk);
773 struct net_device *dev;
774 struct llsec_dump_data data;
775 int idx = 0;
776 int first_dev = cb->args[0];
777 int rc;
778
779 for_each_netdev(net, dev) {
780 if (idx < first_dev || dev->type != ARPHRD_IEEE802154)
781 goto skip;
782
783 data.ops = ieee802154_mlme_ops(dev);
784 if (!data.ops->llsec)
785 goto skip;
786
787 data.skb = skb;
788 data.s_idx = cb->args[1];
789 data.s_idx2 = cb->args[2];
790 data.dev = dev;
791 data.portid = NETLINK_CB(cb->skb).portid;
792 data.nlmsg_seq = cb->nlh->nlmsg_seq;
793
794 data.ops->llsec->lock_table(dev);
795 data.ops->llsec->get_table(data.dev, &data.table);
796 rc = step(&data);
797 data.ops->llsec->unlock_table(dev);
798
799 if (rc < 0)
800 break;
801
802 skip:
803 idx++;
804 }
805 cb->args[0] = idx;
806
807 return skb->len;
808 }
809
810 static int
ieee802154_nl_llsec_change(struct sk_buff * skb,struct genl_info * info,int (* fn)(struct net_device *,struct genl_info *))811 ieee802154_nl_llsec_change(struct sk_buff *skb, struct genl_info *info,
812 int (*fn)(struct net_device*, struct genl_info*))
813 {
814 struct net_device *dev = NULL;
815 int rc = -EINVAL;
816
817 dev = ieee802154_nl_get_dev(info);
818 if (!dev)
819 return -ENODEV;
820
821 if (!ieee802154_mlme_ops(dev)->llsec)
822 rc = -EOPNOTSUPP;
823 else
824 rc = fn(dev, info);
825
826 dev_put(dev);
827 return rc;
828 }
829
830 static int
ieee802154_llsec_parse_key(struct genl_info * info,struct ieee802154_llsec_key * key)831 ieee802154_llsec_parse_key(struct genl_info *info,
832 struct ieee802154_llsec_key *key)
833 {
834 u8 frames;
835 u32 commands[256 / 32];
836
837 memset(key, 0, sizeof(*key));
838
839 if (!info->attrs[IEEE802154_ATTR_LLSEC_KEY_USAGE_FRAME_TYPES] ||
840 !info->attrs[IEEE802154_ATTR_LLSEC_KEY_BYTES])
841 return -EINVAL;
842
843 frames = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_KEY_USAGE_FRAME_TYPES]);
844 if ((frames & BIT(IEEE802154_FC_TYPE_MAC_CMD)) &&
845 !info->attrs[IEEE802154_ATTR_LLSEC_KEY_USAGE_COMMANDS])
846 return -EINVAL;
847
848 if (info->attrs[IEEE802154_ATTR_LLSEC_KEY_USAGE_COMMANDS]) {
849 nla_memcpy(commands,
850 info->attrs[IEEE802154_ATTR_LLSEC_KEY_USAGE_COMMANDS],
851 256 / 8);
852
853 if (commands[0] || commands[1] || commands[2] || commands[3] ||
854 commands[4] || commands[5] || commands[6] ||
855 commands[7] >= BIT(IEEE802154_CMD_GTS_REQ + 1))
856 return -EINVAL;
857
858 key->cmd_frame_ids = commands[7];
859 }
860
861 key->frame_types = frames;
862
863 nla_memcpy(key->key, info->attrs[IEEE802154_ATTR_LLSEC_KEY_BYTES],
864 IEEE802154_LLSEC_KEY_SIZE);
865
866 return 0;
867 }
868
llsec_add_key(struct net_device * dev,struct genl_info * info)869 static int llsec_add_key(struct net_device *dev, struct genl_info *info)
870 {
871 struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
872 struct ieee802154_llsec_key key;
873 struct ieee802154_llsec_key_id id;
874
875 if (ieee802154_llsec_parse_key(info, &key) ||
876 ieee802154_llsec_parse_key_id(info, &id))
877 return -EINVAL;
878
879 return ops->llsec->add_key(dev, &id, &key);
880 }
881
ieee802154_llsec_add_key(struct sk_buff * skb,struct genl_info * info)882 int ieee802154_llsec_add_key(struct sk_buff *skb, struct genl_info *info)
883 {
884 if ((info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) !=
885 (NLM_F_CREATE | NLM_F_EXCL))
886 return -EINVAL;
887
888 return ieee802154_nl_llsec_change(skb, info, llsec_add_key);
889 }
890
llsec_remove_key(struct net_device * dev,struct genl_info * info)891 static int llsec_remove_key(struct net_device *dev, struct genl_info *info)
892 {
893 struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
894 struct ieee802154_llsec_key_id id;
895
896 if (ieee802154_llsec_parse_key_id(info, &id))
897 return -EINVAL;
898
899 return ops->llsec->del_key(dev, &id);
900 }
901
ieee802154_llsec_del_key(struct sk_buff * skb,struct genl_info * info)902 int ieee802154_llsec_del_key(struct sk_buff *skb, struct genl_info *info)
903 {
904 return ieee802154_nl_llsec_change(skb, info, llsec_remove_key);
905 }
906
907 static int
ieee802154_nl_fill_key(struct sk_buff * msg,u32 portid,u32 seq,const struct ieee802154_llsec_key_entry * key,const struct net_device * dev)908 ieee802154_nl_fill_key(struct sk_buff *msg, u32 portid, u32 seq,
909 const struct ieee802154_llsec_key_entry *key,
910 const struct net_device *dev)
911 {
912 void *hdr;
913 u32 commands[256 / 32];
914
915 hdr = genlmsg_put(msg, 0, seq, &nl802154_family, NLM_F_MULTI,
916 IEEE802154_LLSEC_LIST_KEY);
917 if (!hdr)
918 goto out;
919
920 if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
921 nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
922 ieee802154_llsec_fill_key_id(msg, &key->id) ||
923 nla_put_u8(msg, IEEE802154_ATTR_LLSEC_KEY_USAGE_FRAME_TYPES,
924 key->key->frame_types))
925 goto nla_put_failure;
926
927 if (key->key->frame_types & BIT(IEEE802154_FC_TYPE_MAC_CMD)) {
928 memset(commands, 0, sizeof(commands));
929 commands[7] = key->key->cmd_frame_ids;
930 if (nla_put(msg, IEEE802154_ATTR_LLSEC_KEY_USAGE_COMMANDS,
931 sizeof(commands), commands))
932 goto nla_put_failure;
933 }
934
935 if (nla_put(msg, IEEE802154_ATTR_LLSEC_KEY_BYTES,
936 IEEE802154_LLSEC_KEY_SIZE, key->key->key))
937 goto nla_put_failure;
938
939 genlmsg_end(msg, hdr);
940 return 0;
941
942 nla_put_failure:
943 genlmsg_cancel(msg, hdr);
944 out:
945 return -EMSGSIZE;
946 }
947
llsec_iter_keys(struct llsec_dump_data * data)948 static int llsec_iter_keys(struct llsec_dump_data *data)
949 {
950 struct ieee802154_llsec_key_entry *pos;
951 int rc = 0, idx = 0;
952
953 list_for_each_entry(pos, &data->table->keys, list) {
954 if (idx++ < data->s_idx)
955 continue;
956
957 if (ieee802154_nl_fill_key(data->skb, data->portid,
958 data->nlmsg_seq, pos, data->dev)) {
959 rc = -EMSGSIZE;
960 break;
961 }
962
963 data->s_idx++;
964 }
965
966 return rc;
967 }
968
ieee802154_llsec_dump_keys(struct sk_buff * skb,struct netlink_callback * cb)969 int ieee802154_llsec_dump_keys(struct sk_buff *skb, struct netlink_callback *cb)
970 {
971 return ieee802154_llsec_dump_table(skb, cb, llsec_iter_keys);
972 }
973
974 static int
llsec_parse_dev(struct genl_info * info,struct ieee802154_llsec_device * dev)975 llsec_parse_dev(struct genl_info *info,
976 struct ieee802154_llsec_device *dev)
977 {
978 memset(dev, 0, sizeof(*dev));
979
980 if (!info->attrs[IEEE802154_ATTR_LLSEC_FRAME_COUNTER] ||
981 !info->attrs[IEEE802154_ATTR_HW_ADDR] ||
982 !info->attrs[IEEE802154_ATTR_LLSEC_DEV_OVERRIDE] ||
983 !info->attrs[IEEE802154_ATTR_LLSEC_DEV_KEY_MODE] ||
984 (!!info->attrs[IEEE802154_ATTR_PAN_ID] !=
985 !!info->attrs[IEEE802154_ATTR_SHORT_ADDR]))
986 return -EINVAL;
987
988 if (info->attrs[IEEE802154_ATTR_PAN_ID]) {
989 dev->pan_id = nla_get_shortaddr(info->attrs[IEEE802154_ATTR_PAN_ID]);
990 dev->short_addr = nla_get_shortaddr(info->attrs[IEEE802154_ATTR_SHORT_ADDR]);
991 } else {
992 dev->short_addr = cpu_to_le16(IEEE802154_ADDR_UNDEF);
993 }
994
995 dev->hwaddr = nla_get_hwaddr(info->attrs[IEEE802154_ATTR_HW_ADDR]);
996 dev->frame_counter = nla_get_u32(info->attrs[IEEE802154_ATTR_LLSEC_FRAME_COUNTER]);
997 dev->seclevel_exempt = !!nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_DEV_OVERRIDE]);
998 dev->key_mode = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_DEV_KEY_MODE]);
999
1000 if (dev->key_mode >= __IEEE802154_LLSEC_DEVKEY_MAX)
1001 return -EINVAL;
1002
1003 return 0;
1004 }
1005
llsec_add_dev(struct net_device * dev,struct genl_info * info)1006 static int llsec_add_dev(struct net_device *dev, struct genl_info *info)
1007 {
1008 struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
1009 struct ieee802154_llsec_device desc;
1010
1011 if (llsec_parse_dev(info, &desc))
1012 return -EINVAL;
1013
1014 return ops->llsec->add_dev(dev, &desc);
1015 }
1016
ieee802154_llsec_add_dev(struct sk_buff * skb,struct genl_info * info)1017 int ieee802154_llsec_add_dev(struct sk_buff *skb, struct genl_info *info)
1018 {
1019 if ((info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) !=
1020 (NLM_F_CREATE | NLM_F_EXCL))
1021 return -EINVAL;
1022
1023 return ieee802154_nl_llsec_change(skb, info, llsec_add_dev);
1024 }
1025
llsec_del_dev(struct net_device * dev,struct genl_info * info)1026 static int llsec_del_dev(struct net_device *dev, struct genl_info *info)
1027 {
1028 struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
1029 __le64 devaddr;
1030
1031 if (!info->attrs[IEEE802154_ATTR_HW_ADDR])
1032 return -EINVAL;
1033
1034 devaddr = nla_get_hwaddr(info->attrs[IEEE802154_ATTR_HW_ADDR]);
1035
1036 return ops->llsec->del_dev(dev, devaddr);
1037 }
1038
ieee802154_llsec_del_dev(struct sk_buff * skb,struct genl_info * info)1039 int ieee802154_llsec_del_dev(struct sk_buff *skb, struct genl_info *info)
1040 {
1041 return ieee802154_nl_llsec_change(skb, info, llsec_del_dev);
1042 }
1043
1044 static int
ieee802154_nl_fill_dev(struct sk_buff * msg,u32 portid,u32 seq,const struct ieee802154_llsec_device * desc,const struct net_device * dev)1045 ieee802154_nl_fill_dev(struct sk_buff *msg, u32 portid, u32 seq,
1046 const struct ieee802154_llsec_device *desc,
1047 const struct net_device *dev)
1048 {
1049 void *hdr;
1050
1051 hdr = genlmsg_put(msg, 0, seq, &nl802154_family, NLM_F_MULTI,
1052 IEEE802154_LLSEC_LIST_DEV);
1053 if (!hdr)
1054 goto out;
1055
1056 if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
1057 nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
1058 nla_put_shortaddr(msg, IEEE802154_ATTR_PAN_ID, desc->pan_id) ||
1059 nla_put_shortaddr(msg, IEEE802154_ATTR_SHORT_ADDR,
1060 desc->short_addr) ||
1061 nla_put_hwaddr(msg, IEEE802154_ATTR_HW_ADDR, desc->hwaddr,
1062 IEEE802154_ATTR_PAD) ||
1063 nla_put_u32(msg, IEEE802154_ATTR_LLSEC_FRAME_COUNTER,
1064 desc->frame_counter) ||
1065 nla_put_u8(msg, IEEE802154_ATTR_LLSEC_DEV_OVERRIDE,
1066 desc->seclevel_exempt) ||
1067 nla_put_u8(msg, IEEE802154_ATTR_LLSEC_DEV_KEY_MODE, desc->key_mode))
1068 goto nla_put_failure;
1069
1070 genlmsg_end(msg, hdr);
1071 return 0;
1072
1073 nla_put_failure:
1074 genlmsg_cancel(msg, hdr);
1075 out:
1076 return -EMSGSIZE;
1077 }
1078
llsec_iter_devs(struct llsec_dump_data * data)1079 static int llsec_iter_devs(struct llsec_dump_data *data)
1080 {
1081 struct ieee802154_llsec_device *pos;
1082 int rc = 0, idx = 0;
1083
1084 list_for_each_entry(pos, &data->table->devices, list) {
1085 if (idx++ < data->s_idx)
1086 continue;
1087
1088 if (ieee802154_nl_fill_dev(data->skb, data->portid,
1089 data->nlmsg_seq, pos, data->dev)) {
1090 rc = -EMSGSIZE;
1091 break;
1092 }
1093
1094 data->s_idx++;
1095 }
1096
1097 return rc;
1098 }
1099
ieee802154_llsec_dump_devs(struct sk_buff * skb,struct netlink_callback * cb)1100 int ieee802154_llsec_dump_devs(struct sk_buff *skb, struct netlink_callback *cb)
1101 {
1102 return ieee802154_llsec_dump_table(skb, cb, llsec_iter_devs);
1103 }
1104
llsec_add_devkey(struct net_device * dev,struct genl_info * info)1105 static int llsec_add_devkey(struct net_device *dev, struct genl_info *info)
1106 {
1107 struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
1108 struct ieee802154_llsec_device_key key;
1109 __le64 devaddr;
1110
1111 if (!info->attrs[IEEE802154_ATTR_LLSEC_FRAME_COUNTER] ||
1112 !info->attrs[IEEE802154_ATTR_HW_ADDR] ||
1113 ieee802154_llsec_parse_key_id(info, &key.key_id))
1114 return -EINVAL;
1115
1116 devaddr = nla_get_hwaddr(info->attrs[IEEE802154_ATTR_HW_ADDR]);
1117 key.frame_counter = nla_get_u32(info->attrs[IEEE802154_ATTR_LLSEC_FRAME_COUNTER]);
1118
1119 return ops->llsec->add_devkey(dev, devaddr, &key);
1120 }
1121
ieee802154_llsec_add_devkey(struct sk_buff * skb,struct genl_info * info)1122 int ieee802154_llsec_add_devkey(struct sk_buff *skb, struct genl_info *info)
1123 {
1124 if ((info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) !=
1125 (NLM_F_CREATE | NLM_F_EXCL))
1126 return -EINVAL;
1127
1128 return ieee802154_nl_llsec_change(skb, info, llsec_add_devkey);
1129 }
1130
llsec_del_devkey(struct net_device * dev,struct genl_info * info)1131 static int llsec_del_devkey(struct net_device *dev, struct genl_info *info)
1132 {
1133 struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
1134 struct ieee802154_llsec_device_key key;
1135 __le64 devaddr;
1136
1137 if (!info->attrs[IEEE802154_ATTR_HW_ADDR] ||
1138 ieee802154_llsec_parse_key_id(info, &key.key_id))
1139 return -EINVAL;
1140
1141 devaddr = nla_get_hwaddr(info->attrs[IEEE802154_ATTR_HW_ADDR]);
1142
1143 return ops->llsec->del_devkey(dev, devaddr, &key);
1144 }
1145
ieee802154_llsec_del_devkey(struct sk_buff * skb,struct genl_info * info)1146 int ieee802154_llsec_del_devkey(struct sk_buff *skb, struct genl_info *info)
1147 {
1148 return ieee802154_nl_llsec_change(skb, info, llsec_del_devkey);
1149 }
1150
1151 static int
ieee802154_nl_fill_devkey(struct sk_buff * msg,u32 portid,u32 seq,__le64 devaddr,const struct ieee802154_llsec_device_key * devkey,const struct net_device * dev)1152 ieee802154_nl_fill_devkey(struct sk_buff *msg, u32 portid, u32 seq,
1153 __le64 devaddr,
1154 const struct ieee802154_llsec_device_key *devkey,
1155 const struct net_device *dev)
1156 {
1157 void *hdr;
1158
1159 hdr = genlmsg_put(msg, 0, seq, &nl802154_family, NLM_F_MULTI,
1160 IEEE802154_LLSEC_LIST_DEVKEY);
1161 if (!hdr)
1162 goto out;
1163
1164 if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
1165 nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
1166 nla_put_hwaddr(msg, IEEE802154_ATTR_HW_ADDR, devaddr,
1167 IEEE802154_ATTR_PAD) ||
1168 nla_put_u32(msg, IEEE802154_ATTR_LLSEC_FRAME_COUNTER,
1169 devkey->frame_counter) ||
1170 ieee802154_llsec_fill_key_id(msg, &devkey->key_id))
1171 goto nla_put_failure;
1172
1173 genlmsg_end(msg, hdr);
1174 return 0;
1175
1176 nla_put_failure:
1177 genlmsg_cancel(msg, hdr);
1178 out:
1179 return -EMSGSIZE;
1180 }
1181
llsec_iter_devkeys(struct llsec_dump_data * data)1182 static int llsec_iter_devkeys(struct llsec_dump_data *data)
1183 {
1184 struct ieee802154_llsec_device *dpos;
1185 struct ieee802154_llsec_device_key *kpos;
1186 int rc = 0, idx = 0, idx2;
1187
1188 list_for_each_entry(dpos, &data->table->devices, list) {
1189 if (idx++ < data->s_idx)
1190 continue;
1191
1192 idx2 = 0;
1193
1194 list_for_each_entry(kpos, &dpos->keys, list) {
1195 if (idx2++ < data->s_idx2)
1196 continue;
1197
1198 if (ieee802154_nl_fill_devkey(data->skb, data->portid,
1199 data->nlmsg_seq,
1200 dpos->hwaddr, kpos,
1201 data->dev)) {
1202 return rc = -EMSGSIZE;
1203 }
1204
1205 data->s_idx2++;
1206 }
1207
1208 data->s_idx++;
1209 }
1210
1211 return rc;
1212 }
1213
ieee802154_llsec_dump_devkeys(struct sk_buff * skb,struct netlink_callback * cb)1214 int ieee802154_llsec_dump_devkeys(struct sk_buff *skb,
1215 struct netlink_callback *cb)
1216 {
1217 return ieee802154_llsec_dump_table(skb, cb, llsec_iter_devkeys);
1218 }
1219
1220 static int
llsec_parse_seclevel(struct genl_info * info,struct ieee802154_llsec_seclevel * sl)1221 llsec_parse_seclevel(struct genl_info *info,
1222 struct ieee802154_llsec_seclevel *sl)
1223 {
1224 memset(sl, 0, sizeof(*sl));
1225
1226 if (!info->attrs[IEEE802154_ATTR_LLSEC_FRAME_TYPE] ||
1227 !info->attrs[IEEE802154_ATTR_LLSEC_SECLEVELS] ||
1228 !info->attrs[IEEE802154_ATTR_LLSEC_DEV_OVERRIDE])
1229 return -EINVAL;
1230
1231 sl->frame_type = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_FRAME_TYPE]);
1232 if (sl->frame_type == IEEE802154_FC_TYPE_MAC_CMD) {
1233 if (!info->attrs[IEEE802154_ATTR_LLSEC_CMD_FRAME_ID])
1234 return -EINVAL;
1235
1236 sl->cmd_frame_id = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_CMD_FRAME_ID]);
1237 }
1238
1239 sl->sec_levels = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_SECLEVELS]);
1240 sl->device_override = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_DEV_OVERRIDE]);
1241
1242 return 0;
1243 }
1244
llsec_add_seclevel(struct net_device * dev,struct genl_info * info)1245 static int llsec_add_seclevel(struct net_device *dev, struct genl_info *info)
1246 {
1247 struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
1248 struct ieee802154_llsec_seclevel sl;
1249
1250 if (llsec_parse_seclevel(info, &sl))
1251 return -EINVAL;
1252
1253 return ops->llsec->add_seclevel(dev, &sl);
1254 }
1255
ieee802154_llsec_add_seclevel(struct sk_buff * skb,struct genl_info * info)1256 int ieee802154_llsec_add_seclevel(struct sk_buff *skb, struct genl_info *info)
1257 {
1258 if ((info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) !=
1259 (NLM_F_CREATE | NLM_F_EXCL))
1260 return -EINVAL;
1261
1262 return ieee802154_nl_llsec_change(skb, info, llsec_add_seclevel);
1263 }
1264
llsec_del_seclevel(struct net_device * dev,struct genl_info * info)1265 static int llsec_del_seclevel(struct net_device *dev, struct genl_info *info)
1266 {
1267 struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
1268 struct ieee802154_llsec_seclevel sl;
1269
1270 if (llsec_parse_seclevel(info, &sl))
1271 return -EINVAL;
1272
1273 return ops->llsec->del_seclevel(dev, &sl);
1274 }
1275
ieee802154_llsec_del_seclevel(struct sk_buff * skb,struct genl_info * info)1276 int ieee802154_llsec_del_seclevel(struct sk_buff *skb, struct genl_info *info)
1277 {
1278 return ieee802154_nl_llsec_change(skb, info, llsec_del_seclevel);
1279 }
1280
1281 static int
ieee802154_nl_fill_seclevel(struct sk_buff * msg,u32 portid,u32 seq,const struct ieee802154_llsec_seclevel * sl,const struct net_device * dev)1282 ieee802154_nl_fill_seclevel(struct sk_buff *msg, u32 portid, u32 seq,
1283 const struct ieee802154_llsec_seclevel *sl,
1284 const struct net_device *dev)
1285 {
1286 void *hdr;
1287
1288 hdr = genlmsg_put(msg, 0, seq, &nl802154_family, NLM_F_MULTI,
1289 IEEE802154_LLSEC_LIST_SECLEVEL);
1290 if (!hdr)
1291 goto out;
1292
1293 if (nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name) ||
1294 nla_put_u32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex) ||
1295 nla_put_u8(msg, IEEE802154_ATTR_LLSEC_FRAME_TYPE, sl->frame_type) ||
1296 nla_put_u8(msg, IEEE802154_ATTR_LLSEC_SECLEVELS, sl->sec_levels) ||
1297 nla_put_u8(msg, IEEE802154_ATTR_LLSEC_DEV_OVERRIDE,
1298 sl->device_override))
1299 goto nla_put_failure;
1300
1301 if (sl->frame_type == IEEE802154_FC_TYPE_MAC_CMD &&
1302 nla_put_u8(msg, IEEE802154_ATTR_LLSEC_CMD_FRAME_ID,
1303 sl->cmd_frame_id))
1304 goto nla_put_failure;
1305
1306 genlmsg_end(msg, hdr);
1307 return 0;
1308
1309 nla_put_failure:
1310 genlmsg_cancel(msg, hdr);
1311 out:
1312 return -EMSGSIZE;
1313 }
1314
llsec_iter_seclevels(struct llsec_dump_data * data)1315 static int llsec_iter_seclevels(struct llsec_dump_data *data)
1316 {
1317 struct ieee802154_llsec_seclevel *pos;
1318 int rc = 0, idx = 0;
1319
1320 list_for_each_entry(pos, &data->table->security_levels, list) {
1321 if (idx++ < data->s_idx)
1322 continue;
1323
1324 if (ieee802154_nl_fill_seclevel(data->skb, data->portid,
1325 data->nlmsg_seq, pos,
1326 data->dev)) {
1327 rc = -EMSGSIZE;
1328 break;
1329 }
1330
1331 data->s_idx++;
1332 }
1333
1334 return rc;
1335 }
1336
ieee802154_llsec_dump_seclevels(struct sk_buff * skb,struct netlink_callback * cb)1337 int ieee802154_llsec_dump_seclevels(struct sk_buff *skb,
1338 struct netlink_callback *cb)
1339 {
1340 return ieee802154_llsec_dump_table(skb, cb, llsec_iter_seclevels);
1341 }
1342