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79fe1a2a AA |
1 | /* This program is free software; you can redistribute it and/or modify |
2 | * it under the terms of the GNU General Public License version 2 | |
3 | * as published by the Free Software Foundation. | |
4 | * | |
5 | * This program is distributed in the hope that it will be useful, | |
6 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
7 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
8 | * GNU General Public License for more details. | |
9 | * | |
10 | * Authors: | |
11 | * Alexander Aring <aar@pengutronix.de> | |
12 | * | |
13 | * Based on: net/wireless/nl80211.c | |
14 | */ | |
15 | ||
16 | #include <linux/rtnetlink.h> | |
17 | ||
18 | #include <net/cfg802154.h> | |
19 | #include <net/genetlink.h> | |
20 | #include <net/mac802154.h> | |
21 | #include <net/netlink.h> | |
22 | #include <net/nl802154.h> | |
23 | #include <net/sock.h> | |
24 | ||
25 | #include "nl802154.h" | |
ab0bd561 | 26 | #include "rdev-ops.h" |
79fe1a2a AA |
27 | #include "core.h" |
28 | ||
29 | static int nl802154_pre_doit(const struct genl_ops *ops, struct sk_buff *skb, | |
30 | struct genl_info *info); | |
31 | ||
32 | static void nl802154_post_doit(const struct genl_ops *ops, struct sk_buff *skb, | |
33 | struct genl_info *info); | |
34 | ||
35 | /* the netlink family */ | |
36 | static struct genl_family nl802154_fam = { | |
37 | .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */ | |
38 | .name = NL802154_GENL_NAME, /* have users key off the name instead */ | |
39 | .hdrsize = 0, /* no private header */ | |
40 | .version = 1, /* no particular meaning now */ | |
41 | .maxattr = NL802154_ATTR_MAX, | |
42 | .netnsok = true, | |
43 | .pre_doit = nl802154_pre_doit, | |
44 | .post_doit = nl802154_post_doit, | |
45 | }; | |
46 | ||
47 | /* multicast groups */ | |
48 | enum nl802154_multicast_groups { | |
49 | NL802154_MCGRP_CONFIG, | |
50 | }; | |
51 | ||
52 | static const struct genl_multicast_group nl802154_mcgrps[] = { | |
53 | [NL802154_MCGRP_CONFIG] = { .name = "config", }, | |
54 | }; | |
55 | ||
56 | /* returns ERR_PTR values */ | |
57 | static struct wpan_dev * | |
58 | __cfg802154_wpan_dev_from_attrs(struct net *netns, struct nlattr **attrs) | |
59 | { | |
60 | struct cfg802154_registered_device *rdev; | |
61 | struct wpan_dev *result = NULL; | |
62 | bool have_ifidx = attrs[NL802154_ATTR_IFINDEX]; | |
63 | bool have_wpan_dev_id = attrs[NL802154_ATTR_WPAN_DEV]; | |
64 | u64 wpan_dev_id; | |
65 | int wpan_phy_idx = -1; | |
66 | int ifidx = -1; | |
67 | ||
68 | ASSERT_RTNL(); | |
69 | ||
70 | if (!have_ifidx && !have_wpan_dev_id) | |
71 | return ERR_PTR(-EINVAL); | |
72 | ||
73 | if (have_ifidx) | |
74 | ifidx = nla_get_u32(attrs[NL802154_ATTR_IFINDEX]); | |
75 | if (have_wpan_dev_id) { | |
76 | wpan_dev_id = nla_get_u64(attrs[NL802154_ATTR_WPAN_DEV]); | |
77 | wpan_phy_idx = wpan_dev_id >> 32; | |
78 | } | |
79 | ||
80 | list_for_each_entry(rdev, &cfg802154_rdev_list, list) { | |
81 | struct wpan_dev *wpan_dev; | |
82 | ||
83 | /* TODO netns compare */ | |
84 | ||
85 | if (have_wpan_dev_id && rdev->wpan_phy_idx != wpan_phy_idx) | |
86 | continue; | |
87 | ||
88 | list_for_each_entry(wpan_dev, &rdev->wpan_dev_list, list) { | |
89 | if (have_ifidx && wpan_dev->netdev && | |
90 | wpan_dev->netdev->ifindex == ifidx) { | |
91 | result = wpan_dev; | |
92 | break; | |
93 | } | |
94 | if (have_wpan_dev_id && | |
95 | wpan_dev->identifier == (u32)wpan_dev_id) { | |
96 | result = wpan_dev; | |
97 | break; | |
98 | } | |
99 | } | |
100 | ||
101 | if (result) | |
102 | break; | |
103 | } | |
104 | ||
105 | if (result) | |
106 | return result; | |
107 | ||
108 | return ERR_PTR(-ENODEV); | |
109 | } | |
110 | ||
111 | static struct cfg802154_registered_device * | |
112 | __cfg802154_rdev_from_attrs(struct net *netns, struct nlattr **attrs) | |
113 | { | |
114 | struct cfg802154_registered_device *rdev = NULL, *tmp; | |
115 | struct net_device *netdev; | |
116 | ||
117 | ASSERT_RTNL(); | |
118 | ||
119 | if (!attrs[NL802154_ATTR_WPAN_PHY] && | |
120 | !attrs[NL802154_ATTR_IFINDEX] && | |
121 | !attrs[NL802154_ATTR_WPAN_DEV]) | |
122 | return ERR_PTR(-EINVAL); | |
123 | ||
124 | if (attrs[NL802154_ATTR_WPAN_PHY]) | |
125 | rdev = cfg802154_rdev_by_wpan_phy_idx( | |
126 | nla_get_u32(attrs[NL802154_ATTR_WPAN_PHY])); | |
127 | ||
128 | if (attrs[NL802154_ATTR_WPAN_DEV]) { | |
129 | u64 wpan_dev_id = nla_get_u64(attrs[NL802154_ATTR_WPAN_DEV]); | |
130 | struct wpan_dev *wpan_dev; | |
131 | bool found = false; | |
132 | ||
133 | tmp = cfg802154_rdev_by_wpan_phy_idx(wpan_dev_id >> 32); | |
134 | if (tmp) { | |
135 | /* make sure wpan_dev exists */ | |
136 | list_for_each_entry(wpan_dev, &tmp->wpan_dev_list, list) { | |
137 | if (wpan_dev->identifier != (u32)wpan_dev_id) | |
138 | continue; | |
139 | found = true; | |
140 | break; | |
141 | } | |
142 | ||
143 | if (!found) | |
144 | tmp = NULL; | |
145 | ||
146 | if (rdev && tmp != rdev) | |
147 | return ERR_PTR(-EINVAL); | |
148 | rdev = tmp; | |
149 | } | |
150 | } | |
151 | ||
152 | if (attrs[NL802154_ATTR_IFINDEX]) { | |
153 | int ifindex = nla_get_u32(attrs[NL802154_ATTR_IFINDEX]); | |
154 | ||
155 | netdev = __dev_get_by_index(netns, ifindex); | |
156 | if (netdev) { | |
157 | if (netdev->ieee802154_ptr) | |
158 | tmp = wpan_phy_to_rdev( | |
159 | netdev->ieee802154_ptr->wpan_phy); | |
160 | else | |
161 | tmp = NULL; | |
162 | ||
163 | /* not wireless device -- return error */ | |
164 | if (!tmp) | |
165 | return ERR_PTR(-EINVAL); | |
166 | ||
167 | /* mismatch -- return error */ | |
168 | if (rdev && tmp != rdev) | |
169 | return ERR_PTR(-EINVAL); | |
170 | ||
171 | rdev = tmp; | |
172 | } | |
173 | } | |
174 | ||
175 | if (!rdev) | |
176 | return ERR_PTR(-ENODEV); | |
177 | ||
178 | /* TODO netns compare */ | |
179 | ||
180 | return rdev; | |
181 | } | |
182 | ||
183 | /* This function returns a pointer to the driver | |
184 | * that the genl_info item that is passed refers to. | |
185 | * | |
186 | * The result of this can be a PTR_ERR and hence must | |
187 | * be checked with IS_ERR() for errors. | |
188 | */ | |
189 | static struct cfg802154_registered_device * | |
190 | cfg802154_get_dev_from_info(struct net *netns, struct genl_info *info) | |
191 | { | |
192 | return __cfg802154_rdev_from_attrs(netns, info->attrs); | |
193 | } | |
194 | ||
195 | /* policy for the attributes */ | |
196 | static const struct nla_policy nl802154_policy[NL802154_ATTR_MAX+1] = { | |
ca20ce20 AA |
197 | [NL802154_ATTR_WPAN_PHY] = { .type = NLA_U32 }, |
198 | [NL802154_ATTR_WPAN_PHY_NAME] = { .type = NLA_NUL_STRING, | |
199 | .len = 20-1 }, | |
200 | ||
201 | [NL802154_ATTR_IFINDEX] = { .type = NLA_U32 }, | |
4b96aea0 AA |
202 | [NL802154_ATTR_IFTYPE] = { .type = NLA_U32 }, |
203 | [NL802154_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 }, | |
ca20ce20 AA |
204 | |
205 | [NL802154_ATTR_WPAN_DEV] = { .type = NLA_U64 }, | |
206 | ||
207 | [NL802154_ATTR_PAGE] = { .type = NLA_U8, }, | |
208 | [NL802154_ATTR_CHANNEL] = { .type = NLA_U8, }, | |
209 | ||
210 | [NL802154_ATTR_TX_POWER] = { .type = NLA_S8, }, | |
211 | ||
212 | [NL802154_ATTR_CCA_MODE] = { .type = NLA_U8, }, | |
213 | ||
214 | [NL802154_ATTR_SUPPORTED_CHANNEL] = { .type = NLA_U32, }, | |
4b96aea0 AA |
215 | |
216 | [NL802154_ATTR_PAN_ID] = { .type = NLA_U16, }, | |
217 | [NL802154_ATTR_EXTENDED_ADDR] = { .type = NLA_U64 }, | |
218 | [NL802154_ATTR_SHORT_ADDR] = { .type = NLA_U16, }, | |
219 | ||
220 | [NL802154_ATTR_MIN_BE] = { .type = NLA_U8, }, | |
221 | [NL802154_ATTR_MAX_BE] = { .type = NLA_U8, }, | |
222 | [NL802154_ATTR_MAX_CSMA_BACKOFFS] = { .type = NLA_U8, }, | |
223 | ||
224 | [NL802154_ATTR_MAX_FRAME_RETRIES] = { .type = NLA_S8, }, | |
225 | ||
226 | [NL802154_ATTR_LBT_MODE] = { .type = NLA_U8, }, | |
79fe1a2a AA |
227 | }; |
228 | ||
229 | /* message building helper */ | |
230 | static inline void *nl802154hdr_put(struct sk_buff *skb, u32 portid, u32 seq, | |
231 | int flags, u8 cmd) | |
232 | { | |
233 | /* since there is no private header just add the generic one */ | |
234 | return genlmsg_put(skb, portid, seq, &nl802154_fam, flags, cmd); | |
235 | } | |
236 | ||
ca20ce20 AA |
237 | static int |
238 | nl802154_send_wpan_phy_channels(struct cfg802154_registered_device *rdev, | |
239 | struct sk_buff *msg) | |
240 | { | |
241 | struct nlattr *nl_page; | |
242 | unsigned long page; | |
243 | ||
244 | nl_page = nla_nest_start(msg, NL802154_ATTR_CHANNELS_SUPPORTED); | |
245 | if (!nl_page) | |
246 | return -ENOBUFS; | |
247 | ||
cb41c8dd | 248 | for (page = 0; page <= IEEE802154_MAX_PAGE; page++) { |
ca20ce20 AA |
249 | if (nla_put_u32(msg, NL802154_ATTR_SUPPORTED_CHANNEL, |
250 | rdev->wpan_phy.channels_supported[page])) | |
251 | return -ENOBUFS; | |
252 | } | |
253 | nla_nest_end(msg, nl_page); | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
258 | static int nl802154_send_wpan_phy(struct cfg802154_registered_device *rdev, | |
259 | enum nl802154_commands cmd, | |
260 | struct sk_buff *msg, u32 portid, u32 seq, | |
261 | int flags) | |
262 | { | |
263 | void *hdr; | |
264 | ||
265 | hdr = nl802154hdr_put(msg, portid, seq, flags, cmd); | |
266 | if (!hdr) | |
267 | return -ENOBUFS; | |
268 | ||
269 | if (nla_put_u32(msg, NL802154_ATTR_WPAN_PHY, rdev->wpan_phy_idx) || | |
270 | nla_put_string(msg, NL802154_ATTR_WPAN_PHY_NAME, | |
271 | wpan_phy_name(&rdev->wpan_phy)) || | |
272 | nla_put_u32(msg, NL802154_ATTR_GENERATION, | |
273 | cfg802154_rdev_list_generation)) | |
274 | goto nla_put_failure; | |
275 | ||
276 | if (cmd != NL802154_CMD_NEW_WPAN_PHY) | |
277 | goto finish; | |
278 | ||
279 | /* DUMP PHY PIB */ | |
280 | ||
281 | /* current channel settings */ | |
282 | if (nla_put_u8(msg, NL802154_ATTR_PAGE, | |
283 | rdev->wpan_phy.current_page) || | |
284 | nla_put_u8(msg, NL802154_ATTR_CHANNEL, | |
285 | rdev->wpan_phy.current_channel)) | |
286 | goto nla_put_failure; | |
287 | ||
288 | /* supported channels array */ | |
289 | if (nl802154_send_wpan_phy_channels(rdev, msg)) | |
290 | goto nla_put_failure; | |
291 | ||
292 | /* cca mode */ | |
293 | if (nla_put_u8(msg, NL802154_ATTR_CCA_MODE, | |
294 | rdev->wpan_phy.cca_mode)) | |
295 | goto nla_put_failure; | |
296 | ||
297 | if (nla_put_s8(msg, NL802154_ATTR_TX_POWER, | |
298 | rdev->wpan_phy.transmit_power)) | |
299 | goto nla_put_failure; | |
300 | ||
301 | finish: | |
302 | return genlmsg_end(msg, hdr); | |
303 | ||
304 | nla_put_failure: | |
305 | genlmsg_cancel(msg, hdr); | |
306 | return -EMSGSIZE; | |
307 | } | |
308 | ||
309 | struct nl802154_dump_wpan_phy_state { | |
310 | s64 filter_wpan_phy; | |
311 | long start; | |
312 | ||
313 | }; | |
314 | ||
315 | static int nl802154_dump_wpan_phy_parse(struct sk_buff *skb, | |
316 | struct netlink_callback *cb, | |
317 | struct nl802154_dump_wpan_phy_state *state) | |
318 | { | |
319 | struct nlattr **tb = nl802154_fam.attrbuf; | |
320 | int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl802154_fam.hdrsize, | |
321 | tb, nl802154_fam.maxattr, nl802154_policy); | |
322 | ||
323 | /* TODO check if we can handle error here, | |
324 | * we have no backward compatibility | |
325 | */ | |
326 | if (ret) | |
327 | return 0; | |
328 | ||
329 | if (tb[NL802154_ATTR_WPAN_PHY]) | |
330 | state->filter_wpan_phy = nla_get_u32(tb[NL802154_ATTR_WPAN_PHY]); | |
331 | if (tb[NL802154_ATTR_WPAN_DEV]) | |
332 | state->filter_wpan_phy = nla_get_u64(tb[NL802154_ATTR_WPAN_DEV]) >> 32; | |
333 | if (tb[NL802154_ATTR_IFINDEX]) { | |
334 | struct net_device *netdev; | |
335 | struct cfg802154_registered_device *rdev; | |
336 | int ifidx = nla_get_u32(tb[NL802154_ATTR_IFINDEX]); | |
337 | ||
338 | /* TODO netns */ | |
339 | netdev = __dev_get_by_index(&init_net, ifidx); | |
340 | if (!netdev) | |
341 | return -ENODEV; | |
342 | if (netdev->ieee802154_ptr) { | |
343 | rdev = wpan_phy_to_rdev( | |
344 | netdev->ieee802154_ptr->wpan_phy); | |
345 | state->filter_wpan_phy = rdev->wpan_phy_idx; | |
346 | } | |
347 | } | |
348 | ||
349 | return 0; | |
350 | } | |
351 | ||
352 | static int | |
353 | nl802154_dump_wpan_phy(struct sk_buff *skb, struct netlink_callback *cb) | |
354 | { | |
355 | int idx = 0, ret; | |
356 | struct nl802154_dump_wpan_phy_state *state = (void *)cb->args[0]; | |
357 | struct cfg802154_registered_device *rdev; | |
358 | ||
359 | rtnl_lock(); | |
360 | if (!state) { | |
361 | state = kzalloc(sizeof(*state), GFP_KERNEL); | |
362 | if (!state) { | |
363 | rtnl_unlock(); | |
364 | return -ENOMEM; | |
365 | } | |
366 | state->filter_wpan_phy = -1; | |
367 | ret = nl802154_dump_wpan_phy_parse(skb, cb, state); | |
368 | if (ret) { | |
369 | kfree(state); | |
370 | rtnl_unlock(); | |
371 | return ret; | |
372 | } | |
373 | cb->args[0] = (long)state; | |
374 | } | |
375 | ||
376 | list_for_each_entry(rdev, &cfg802154_rdev_list, list) { | |
377 | /* TODO net ns compare */ | |
378 | if (++idx <= state->start) | |
379 | continue; | |
380 | if (state->filter_wpan_phy != -1 && | |
381 | state->filter_wpan_phy != rdev->wpan_phy_idx) | |
382 | continue; | |
383 | /* attempt to fit multiple wpan_phy data chunks into the skb */ | |
384 | ret = nl802154_send_wpan_phy(rdev, | |
385 | NL802154_CMD_NEW_WPAN_PHY, | |
386 | skb, | |
387 | NETLINK_CB(cb->skb).portid, | |
388 | cb->nlh->nlmsg_seq, NLM_F_MULTI); | |
389 | if (ret < 0) { | |
390 | if ((ret == -ENOBUFS || ret == -EMSGSIZE) && | |
391 | !skb->len && cb->min_dump_alloc < 4096) { | |
392 | cb->min_dump_alloc = 4096; | |
393 | rtnl_unlock(); | |
394 | return 1; | |
395 | } | |
396 | idx--; | |
397 | break; | |
398 | } | |
399 | break; | |
400 | } | |
401 | rtnl_unlock(); | |
402 | ||
403 | state->start = idx; | |
404 | ||
405 | return skb->len; | |
406 | } | |
407 | ||
408 | static int nl802154_dump_wpan_phy_done(struct netlink_callback *cb) | |
409 | { | |
410 | kfree((void *)cb->args[0]); | |
411 | return 0; | |
412 | } | |
413 | ||
414 | static int nl802154_get_wpan_phy(struct sk_buff *skb, struct genl_info *info) | |
415 | { | |
416 | struct sk_buff *msg; | |
417 | struct cfg802154_registered_device *rdev = info->user_ptr[0]; | |
418 | ||
419 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
420 | if (!msg) | |
421 | return -ENOMEM; | |
422 | ||
423 | if (nl802154_send_wpan_phy(rdev, NL802154_CMD_NEW_WPAN_PHY, msg, | |
424 | info->snd_portid, info->snd_seq, 0) < 0) { | |
425 | nlmsg_free(msg); | |
426 | return -ENOBUFS; | |
427 | } | |
428 | ||
429 | return genlmsg_reply(msg, info); | |
430 | } | |
431 | ||
4b96aea0 AA |
432 | static inline u64 wpan_dev_id(struct wpan_dev *wpan_dev) |
433 | { | |
434 | return (u64)wpan_dev->identifier | | |
435 | ((u64)wpan_phy_to_rdev(wpan_dev->wpan_phy)->wpan_phy_idx << 32); | |
436 | } | |
437 | ||
438 | static int | |
439 | nl802154_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags, | |
440 | struct cfg802154_registered_device *rdev, | |
441 | struct wpan_dev *wpan_dev) | |
442 | { | |
443 | struct net_device *dev = wpan_dev->netdev; | |
444 | void *hdr; | |
445 | ||
446 | hdr = nl802154hdr_put(msg, portid, seq, flags, | |
447 | NL802154_CMD_NEW_INTERFACE); | |
448 | if (!hdr) | |
449 | return -1; | |
450 | ||
451 | if (dev && | |
452 | (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex) || | |
453 | nla_put_string(msg, NL802154_ATTR_IFNAME, dev->name))) | |
454 | goto nla_put_failure; | |
455 | ||
456 | if (nla_put_u32(msg, NL802154_ATTR_WPAN_PHY, rdev->wpan_phy_idx) || | |
457 | nla_put_u32(msg, NL802154_ATTR_IFTYPE, wpan_dev->iftype) || | |
458 | nla_put_u64(msg, NL802154_ATTR_WPAN_DEV, wpan_dev_id(wpan_dev)) || | |
459 | nla_put_u32(msg, NL802154_ATTR_GENERATION, | |
460 | rdev->devlist_generation ^ | |
461 | (cfg802154_rdev_list_generation << 2))) | |
462 | goto nla_put_failure; | |
463 | ||
464 | /* address settings */ | |
465 | if (nla_put_le64(msg, NL802154_ATTR_EXTENDED_ADDR, | |
466 | wpan_dev->extended_addr) || | |
467 | nla_put_le16(msg, NL802154_ATTR_SHORT_ADDR, | |
468 | wpan_dev->short_addr) || | |
469 | nla_put_le16(msg, NL802154_ATTR_PAN_ID, wpan_dev->pan_id)) | |
470 | goto nla_put_failure; | |
471 | ||
472 | /* ARET handling */ | |
473 | if (nla_put_s8(msg, NL802154_ATTR_MAX_FRAME_RETRIES, | |
474 | wpan_dev->frame_retries) || | |
475 | nla_put_u8(msg, NL802154_ATTR_MAX_BE, wpan_dev->max_be) || | |
476 | nla_put_u8(msg, NL802154_ATTR_MAX_CSMA_BACKOFFS, | |
477 | wpan_dev->csma_retries) || | |
478 | nla_put_u8(msg, NL802154_ATTR_MIN_BE, wpan_dev->min_be)) | |
479 | goto nla_put_failure; | |
480 | ||
481 | /* listen before transmit */ | |
482 | if (nla_put_u8(msg, NL802154_ATTR_LBT_MODE, wpan_dev->lbt)) | |
483 | goto nla_put_failure; | |
484 | ||
485 | return genlmsg_end(msg, hdr); | |
486 | ||
487 | nla_put_failure: | |
488 | genlmsg_cancel(msg, hdr); | |
489 | return -EMSGSIZE; | |
490 | } | |
491 | ||
492 | static int | |
493 | nl802154_dump_interface(struct sk_buff *skb, struct netlink_callback *cb) | |
494 | { | |
495 | int wp_idx = 0; | |
496 | int if_idx = 0; | |
497 | int wp_start = cb->args[0]; | |
498 | int if_start = cb->args[1]; | |
499 | struct cfg802154_registered_device *rdev; | |
500 | struct wpan_dev *wpan_dev; | |
501 | ||
502 | rtnl_lock(); | |
503 | list_for_each_entry(rdev, &cfg802154_rdev_list, list) { | |
504 | /* TODO netns compare */ | |
505 | if (wp_idx < wp_start) { | |
506 | wp_idx++; | |
507 | continue; | |
508 | } | |
509 | if_idx = 0; | |
510 | ||
511 | list_for_each_entry(wpan_dev, &rdev->wpan_dev_list, list) { | |
512 | if (if_idx < if_start) { | |
513 | if_idx++; | |
514 | continue; | |
515 | } | |
516 | if (nl802154_send_iface(skb, NETLINK_CB(cb->skb).portid, | |
517 | cb->nlh->nlmsg_seq, NLM_F_MULTI, | |
518 | rdev, wpan_dev) < 0) { | |
519 | goto out; | |
520 | } | |
521 | if_idx++; | |
522 | } | |
523 | ||
524 | wp_idx++; | |
525 | } | |
526 | out: | |
527 | rtnl_unlock(); | |
528 | ||
529 | cb->args[0] = wp_idx; | |
530 | cb->args[1] = if_idx; | |
531 | ||
532 | return skb->len; | |
533 | } | |
534 | ||
535 | static int nl802154_get_interface(struct sk_buff *skb, struct genl_info *info) | |
536 | { | |
537 | struct sk_buff *msg; | |
538 | struct cfg802154_registered_device *rdev = info->user_ptr[0]; | |
539 | struct wpan_dev *wdev = info->user_ptr[1]; | |
540 | ||
541 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
542 | if (!msg) | |
543 | return -ENOMEM; | |
544 | ||
545 | if (nl802154_send_iface(msg, info->snd_portid, info->snd_seq, 0, | |
546 | rdev, wdev) < 0) { | |
547 | nlmsg_free(msg); | |
548 | return -ENOBUFS; | |
549 | } | |
550 | ||
551 | return genlmsg_reply(msg, info); | |
552 | } | |
553 | ||
f3ea5e44 AA |
554 | static int nl802154_new_interface(struct sk_buff *skb, struct genl_info *info) |
555 | { | |
556 | struct cfg802154_registered_device *rdev = info->user_ptr[0]; | |
557 | enum nl802154_iftype type = NL802154_IFTYPE_UNSPEC; | |
0e57547e | 558 | __le64 extended_addr = cpu_to_le64(0x0000000000000000ULL); |
f3ea5e44 AA |
559 | |
560 | /* TODO avoid failing a new interface | |
561 | * creation due to pending removal? | |
562 | */ | |
563 | ||
564 | if (!info->attrs[NL802154_ATTR_IFNAME]) | |
565 | return -EINVAL; | |
566 | ||
567 | if (info->attrs[NL802154_ATTR_IFTYPE]) { | |
568 | type = nla_get_u32(info->attrs[NL802154_ATTR_IFTYPE]); | |
569 | if (type > NL802154_IFTYPE_MAX) | |
570 | return -EINVAL; | |
571 | } | |
572 | ||
0e57547e AA |
573 | /* TODO add nla_get_le64 to netlink */ |
574 | if (info->attrs[NL802154_ATTR_EXTENDED_ADDR]) | |
575 | extended_addr = (__force __le64)nla_get_u64( | |
576 | info->attrs[NL802154_ATTR_EXTENDED_ADDR]); | |
577 | ||
f3ea5e44 AA |
578 | if (!rdev->ops->add_virtual_intf) |
579 | return -EOPNOTSUPP; | |
580 | ||
581 | return rdev_add_virtual_intf(rdev, | |
582 | nla_data(info->attrs[NL802154_ATTR_IFNAME]), | |
0e57547e | 583 | type, extended_addr); |
f3ea5e44 AA |
584 | } |
585 | ||
b821ecd4 AA |
586 | static int nl802154_del_interface(struct sk_buff *skb, struct genl_info *info) |
587 | { | |
588 | struct cfg802154_registered_device *rdev = info->user_ptr[0]; | |
589 | struct wpan_dev *wpan_dev = info->user_ptr[1]; | |
590 | ||
591 | if (!rdev->ops->del_virtual_intf) | |
592 | return -EOPNOTSUPP; | |
593 | ||
594 | /* If we remove a wpan device without a netdev then clear | |
595 | * user_ptr[1] so that nl802154_post_doit won't dereference it | |
596 | * to check if it needs to do dev_put(). Otherwise it crashes | |
597 | * since the wpan_dev has been freed, unlike with a netdev where | |
598 | * we need the dev_put() for the netdev to really be freed. | |
599 | */ | |
600 | if (!wpan_dev->netdev) | |
601 | info->user_ptr[1] = NULL; | |
602 | ||
603 | return rdev_del_virtual_intf(rdev, wpan_dev); | |
604 | } | |
605 | ||
ab0bd561 AA |
606 | static int nl802154_set_channel(struct sk_buff *skb, struct genl_info *info) |
607 | { | |
608 | struct cfg802154_registered_device *rdev = info->user_ptr[0]; | |
609 | u8 channel, page; | |
610 | ||
611 | if (!info->attrs[NL802154_ATTR_PAGE] || | |
612 | !info->attrs[NL802154_ATTR_CHANNEL]) | |
613 | return -EINVAL; | |
614 | ||
615 | page = nla_get_u8(info->attrs[NL802154_ATTR_PAGE]); | |
616 | channel = nla_get_u8(info->attrs[NL802154_ATTR_CHANNEL]); | |
617 | ||
618 | /* check 802.15.4 constraints */ | |
cb41c8dd | 619 | if (page > IEEE802154_MAX_PAGE || channel > IEEE802154_MAX_CHANNEL) |
ab0bd561 AA |
620 | return -EINVAL; |
621 | ||
622 | return rdev_set_channel(rdev, page, channel); | |
623 | } | |
624 | ||
702bf371 AA |
625 | static int nl802154_set_pan_id(struct sk_buff *skb, struct genl_info *info) |
626 | { | |
627 | struct cfg802154_registered_device *rdev = info->user_ptr[0]; | |
628 | struct net_device *dev = info->user_ptr[1]; | |
629 | struct wpan_dev *wpan_dev = dev->ieee802154_ptr; | |
ee7b9053 | 630 | __le16 pan_id; |
702bf371 AA |
631 | |
632 | /* conflict here while tx/rx calls */ | |
633 | if (netif_running(dev)) | |
634 | return -EBUSY; | |
635 | ||
636 | /* don't change address fields on monitor */ | |
637 | if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR) | |
638 | return -EINVAL; | |
639 | ||
640 | if (!info->attrs[NL802154_ATTR_PAN_ID]) | |
641 | return -EINVAL; | |
642 | ||
ee7b9053 | 643 | pan_id = nla_get_le16(info->attrs[NL802154_ATTR_PAN_ID]); |
702bf371 AA |
644 | |
645 | return rdev_set_pan_id(rdev, wpan_dev, pan_id); | |
646 | } | |
647 | ||
9830c62a AA |
648 | static int nl802154_set_short_addr(struct sk_buff *skb, struct genl_info *info) |
649 | { | |
650 | struct cfg802154_registered_device *rdev = info->user_ptr[0]; | |
651 | struct net_device *dev = info->user_ptr[1]; | |
652 | struct wpan_dev *wpan_dev = dev->ieee802154_ptr; | |
ee7b9053 | 653 | __le16 short_addr; |
9830c62a AA |
654 | |
655 | /* conflict here while tx/rx calls */ | |
656 | if (netif_running(dev)) | |
657 | return -EBUSY; | |
658 | ||
659 | /* don't change address fields on monitor */ | |
660 | if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR) | |
661 | return -EINVAL; | |
662 | ||
663 | if (!info->attrs[NL802154_ATTR_SHORT_ADDR]) | |
664 | return -EINVAL; | |
665 | ||
ee7b9053 | 666 | short_addr = nla_get_le16(info->attrs[NL802154_ATTR_SHORT_ADDR]); |
9830c62a AA |
667 | |
668 | return rdev_set_short_addr(rdev, wpan_dev, short_addr); | |
669 | } | |
670 | ||
656a999e AA |
671 | static int |
672 | nl802154_set_backoff_exponent(struct sk_buff *skb, struct genl_info *info) | |
673 | { | |
674 | struct cfg802154_registered_device *rdev = info->user_ptr[0]; | |
675 | struct net_device *dev = info->user_ptr[1]; | |
676 | struct wpan_dev *wpan_dev = dev->ieee802154_ptr; | |
677 | u8 min_be, max_be; | |
678 | ||
679 | /* should be set on netif open inside phy settings */ | |
680 | if (netif_running(dev)) | |
681 | return -EBUSY; | |
682 | ||
683 | if (!info->attrs[NL802154_ATTR_MIN_BE] || | |
684 | !info->attrs[NL802154_ATTR_MAX_BE]) | |
685 | return -EINVAL; | |
686 | ||
687 | min_be = nla_get_u8(info->attrs[NL802154_ATTR_MIN_BE]); | |
688 | max_be = nla_get_u8(info->attrs[NL802154_ATTR_MAX_BE]); | |
689 | ||
690 | /* check 802.15.4 constraints */ | |
691 | if (max_be < 3 || max_be > 8 || min_be > max_be) | |
692 | return -EINVAL; | |
693 | ||
694 | return rdev_set_backoff_exponent(rdev, wpan_dev, min_be, max_be); | |
695 | } | |
696 | ||
a01ba765 AA |
697 | static int |
698 | nl802154_set_max_csma_backoffs(struct sk_buff *skb, struct genl_info *info) | |
699 | { | |
700 | struct cfg802154_registered_device *rdev = info->user_ptr[0]; | |
701 | struct net_device *dev = info->user_ptr[1]; | |
702 | struct wpan_dev *wpan_dev = dev->ieee802154_ptr; | |
703 | u8 max_csma_backoffs; | |
704 | ||
705 | /* conflict here while other running iface settings */ | |
706 | if (netif_running(dev)) | |
707 | return -EBUSY; | |
708 | ||
709 | if (!info->attrs[NL802154_ATTR_MAX_CSMA_BACKOFFS]) | |
710 | return -EINVAL; | |
711 | ||
712 | max_csma_backoffs = nla_get_u8( | |
713 | info->attrs[NL802154_ATTR_MAX_CSMA_BACKOFFS]); | |
714 | ||
715 | /* check 802.15.4 constraints */ | |
716 | if (max_csma_backoffs > 5) | |
717 | return -EINVAL; | |
718 | ||
719 | return rdev_set_max_csma_backoffs(rdev, wpan_dev, max_csma_backoffs); | |
720 | } | |
721 | ||
17a3a46b AA |
722 | static int |
723 | nl802154_set_max_frame_retries(struct sk_buff *skb, struct genl_info *info) | |
724 | { | |
725 | struct cfg802154_registered_device *rdev = info->user_ptr[0]; | |
726 | struct net_device *dev = info->user_ptr[1]; | |
727 | struct wpan_dev *wpan_dev = dev->ieee802154_ptr; | |
728 | s8 max_frame_retries; | |
729 | ||
730 | if (netif_running(dev)) | |
731 | return -EBUSY; | |
732 | ||
733 | if (!info->attrs[NL802154_ATTR_MAX_FRAME_RETRIES]) | |
734 | return -EINVAL; | |
735 | ||
736 | max_frame_retries = nla_get_s8( | |
737 | info->attrs[NL802154_ATTR_MAX_FRAME_RETRIES]); | |
738 | ||
739 | /* check 802.15.4 constraints */ | |
740 | if (max_frame_retries < -1 || max_frame_retries > 7) | |
741 | return -EINVAL; | |
742 | ||
743 | return rdev_set_max_frame_retries(rdev, wpan_dev, max_frame_retries); | |
744 | } | |
745 | ||
c8937a1d AA |
746 | static int nl802154_set_lbt_mode(struct sk_buff *skb, struct genl_info *info) |
747 | { | |
748 | struct cfg802154_registered_device *rdev = info->user_ptr[0]; | |
749 | struct net_device *dev = info->user_ptr[1]; | |
750 | struct wpan_dev *wpan_dev = dev->ieee802154_ptr; | |
751 | bool mode; | |
752 | ||
753 | if (netif_running(dev)) | |
754 | return -EBUSY; | |
755 | ||
756 | if (!info->attrs[NL802154_ATTR_LBT_MODE]) | |
757 | return -EINVAL; | |
758 | ||
759 | mode = !!nla_get_u8(info->attrs[NL802154_ATTR_LBT_MODE]); | |
760 | return rdev_set_lbt_mode(rdev, wpan_dev, mode); | |
761 | } | |
762 | ||
79fe1a2a AA |
763 | #define NL802154_FLAG_NEED_WPAN_PHY 0x01 |
764 | #define NL802154_FLAG_NEED_NETDEV 0x02 | |
765 | #define NL802154_FLAG_NEED_RTNL 0x04 | |
766 | #define NL802154_FLAG_CHECK_NETDEV_UP 0x08 | |
767 | #define NL802154_FLAG_NEED_NETDEV_UP (NL802154_FLAG_NEED_NETDEV |\ | |
768 | NL802154_FLAG_CHECK_NETDEV_UP) | |
769 | #define NL802154_FLAG_NEED_WPAN_DEV 0x10 | |
770 | #define NL802154_FLAG_NEED_WPAN_DEV_UP (NL802154_FLAG_NEED_WPAN_DEV |\ | |
771 | NL802154_FLAG_CHECK_NETDEV_UP) | |
772 | ||
773 | static int nl802154_pre_doit(const struct genl_ops *ops, struct sk_buff *skb, | |
774 | struct genl_info *info) | |
775 | { | |
776 | struct cfg802154_registered_device *rdev; | |
777 | struct wpan_dev *wpan_dev; | |
778 | struct net_device *dev; | |
779 | bool rtnl = ops->internal_flags & NL802154_FLAG_NEED_RTNL; | |
780 | ||
781 | if (rtnl) | |
782 | rtnl_lock(); | |
783 | ||
784 | if (ops->internal_flags & NL802154_FLAG_NEED_WPAN_PHY) { | |
785 | rdev = cfg802154_get_dev_from_info(genl_info_net(info), info); | |
786 | if (IS_ERR(rdev)) { | |
787 | if (rtnl) | |
788 | rtnl_unlock(); | |
789 | return PTR_ERR(rdev); | |
790 | } | |
791 | info->user_ptr[0] = rdev; | |
792 | } else if (ops->internal_flags & NL802154_FLAG_NEED_NETDEV || | |
793 | ops->internal_flags & NL802154_FLAG_NEED_WPAN_DEV) { | |
794 | ASSERT_RTNL(); | |
795 | wpan_dev = __cfg802154_wpan_dev_from_attrs(genl_info_net(info), | |
796 | info->attrs); | |
797 | if (IS_ERR(wpan_dev)) { | |
798 | if (rtnl) | |
799 | rtnl_unlock(); | |
800 | return PTR_ERR(wpan_dev); | |
801 | } | |
802 | ||
803 | dev = wpan_dev->netdev; | |
804 | rdev = wpan_phy_to_rdev(wpan_dev->wpan_phy); | |
805 | ||
806 | if (ops->internal_flags & NL802154_FLAG_NEED_NETDEV) { | |
807 | if (!dev) { | |
808 | if (rtnl) | |
809 | rtnl_unlock(); | |
810 | return -EINVAL; | |
811 | } | |
812 | ||
813 | info->user_ptr[1] = dev; | |
814 | } else { | |
815 | info->user_ptr[1] = wpan_dev; | |
816 | } | |
817 | ||
818 | if (dev) { | |
819 | if (ops->internal_flags & NL802154_FLAG_CHECK_NETDEV_UP && | |
820 | !netif_running(dev)) { | |
821 | if (rtnl) | |
822 | rtnl_unlock(); | |
823 | return -ENETDOWN; | |
824 | } | |
825 | ||
826 | dev_hold(dev); | |
827 | } | |
828 | ||
829 | info->user_ptr[0] = rdev; | |
830 | } | |
831 | ||
832 | return 0; | |
833 | } | |
834 | ||
835 | static void nl802154_post_doit(const struct genl_ops *ops, struct sk_buff *skb, | |
836 | struct genl_info *info) | |
837 | { | |
838 | if (info->user_ptr[1]) { | |
839 | if (ops->internal_flags & NL802154_FLAG_NEED_WPAN_DEV) { | |
840 | struct wpan_dev *wpan_dev = info->user_ptr[1]; | |
841 | ||
842 | if (wpan_dev->netdev) | |
843 | dev_put(wpan_dev->netdev); | |
844 | } else { | |
845 | dev_put(info->user_ptr[1]); | |
846 | } | |
847 | } | |
848 | ||
849 | if (ops->internal_flags & NL802154_FLAG_NEED_RTNL) | |
850 | rtnl_unlock(); | |
851 | } | |
852 | ||
853 | static const struct genl_ops nl802154_ops[] = { | |
ca20ce20 AA |
854 | { |
855 | .cmd = NL802154_CMD_GET_WPAN_PHY, | |
856 | .doit = nl802154_get_wpan_phy, | |
857 | .dumpit = nl802154_dump_wpan_phy, | |
858 | .done = nl802154_dump_wpan_phy_done, | |
859 | .policy = nl802154_policy, | |
860 | /* can be retrieved by unprivileged users */ | |
861 | .internal_flags = NL802154_FLAG_NEED_WPAN_PHY | | |
862 | NL802154_FLAG_NEED_RTNL, | |
863 | }, | |
4b96aea0 AA |
864 | { |
865 | .cmd = NL802154_CMD_GET_INTERFACE, | |
866 | .doit = nl802154_get_interface, | |
867 | .dumpit = nl802154_dump_interface, | |
868 | .policy = nl802154_policy, | |
869 | /* can be retrieved by unprivileged users */ | |
870 | .internal_flags = NL802154_FLAG_NEED_WPAN_DEV | | |
871 | NL802154_FLAG_NEED_RTNL, | |
872 | }, | |
f3ea5e44 AA |
873 | { |
874 | .cmd = NL802154_CMD_NEW_INTERFACE, | |
875 | .doit = nl802154_new_interface, | |
876 | .policy = nl802154_policy, | |
877 | .flags = GENL_ADMIN_PERM, | |
878 | .internal_flags = NL802154_FLAG_NEED_WPAN_PHY | | |
879 | NL802154_FLAG_NEED_RTNL, | |
880 | }, | |
b821ecd4 AA |
881 | { |
882 | .cmd = NL802154_CMD_DEL_INTERFACE, | |
883 | .doit = nl802154_del_interface, | |
884 | .policy = nl802154_policy, | |
885 | .flags = GENL_ADMIN_PERM, | |
886 | .internal_flags = NL802154_FLAG_NEED_WPAN_DEV | | |
887 | NL802154_FLAG_NEED_RTNL, | |
888 | }, | |
ab0bd561 AA |
889 | { |
890 | .cmd = NL802154_CMD_SET_CHANNEL, | |
891 | .doit = nl802154_set_channel, | |
892 | .policy = nl802154_policy, | |
893 | .flags = GENL_ADMIN_PERM, | |
894 | .internal_flags = NL802154_FLAG_NEED_WPAN_PHY | | |
895 | NL802154_FLAG_NEED_RTNL, | |
896 | }, | |
702bf371 AA |
897 | { |
898 | .cmd = NL802154_CMD_SET_PAN_ID, | |
899 | .doit = nl802154_set_pan_id, | |
900 | .policy = nl802154_policy, | |
901 | .flags = GENL_ADMIN_PERM, | |
902 | .internal_flags = NL802154_FLAG_NEED_NETDEV | | |
903 | NL802154_FLAG_NEED_RTNL, | |
904 | }, | |
9830c62a AA |
905 | { |
906 | .cmd = NL802154_CMD_SET_SHORT_ADDR, | |
907 | .doit = nl802154_set_short_addr, | |
908 | .policy = nl802154_policy, | |
909 | .flags = GENL_ADMIN_PERM, | |
910 | .internal_flags = NL802154_FLAG_NEED_NETDEV | | |
911 | NL802154_FLAG_NEED_RTNL, | |
912 | }, | |
656a999e AA |
913 | { |
914 | .cmd = NL802154_CMD_SET_BACKOFF_EXPONENT, | |
915 | .doit = nl802154_set_backoff_exponent, | |
916 | .policy = nl802154_policy, | |
917 | .flags = GENL_ADMIN_PERM, | |
918 | .internal_flags = NL802154_FLAG_NEED_NETDEV | | |
919 | NL802154_FLAG_NEED_RTNL, | |
920 | }, | |
a01ba765 AA |
921 | { |
922 | .cmd = NL802154_CMD_SET_MAX_CSMA_BACKOFFS, | |
923 | .doit = nl802154_set_max_csma_backoffs, | |
924 | .policy = nl802154_policy, | |
925 | .flags = GENL_ADMIN_PERM, | |
926 | .internal_flags = NL802154_FLAG_NEED_NETDEV | | |
927 | NL802154_FLAG_NEED_RTNL, | |
928 | }, | |
17a3a46b AA |
929 | { |
930 | .cmd = NL802154_CMD_SET_MAX_FRAME_RETRIES, | |
931 | .doit = nl802154_set_max_frame_retries, | |
932 | .policy = nl802154_policy, | |
933 | .flags = GENL_ADMIN_PERM, | |
934 | .internal_flags = NL802154_FLAG_NEED_NETDEV | | |
935 | NL802154_FLAG_NEED_RTNL, | |
936 | }, | |
c8937a1d AA |
937 | { |
938 | .cmd = NL802154_CMD_SET_LBT_MODE, | |
939 | .doit = nl802154_set_lbt_mode, | |
940 | .policy = nl802154_policy, | |
941 | .flags = GENL_ADMIN_PERM, | |
942 | .internal_flags = NL802154_FLAG_NEED_NETDEV | | |
943 | NL802154_FLAG_NEED_RTNL, | |
944 | }, | |
79fe1a2a AA |
945 | }; |
946 | ||
947 | /* initialisation/exit functions */ | |
948 | int nl802154_init(void) | |
949 | { | |
950 | return genl_register_family_with_ops_groups(&nl802154_fam, nl802154_ops, | |
951 | nl802154_mcgrps); | |
952 | } | |
953 | ||
954 | void nl802154_exit(void) | |
955 | { | |
956 | genl_unregister_family(&nl802154_fam); | |
957 | } |