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devices: add device id for Atheros AR9287 and AR9380
[project/iwinfo.git] / iwinfo_nl80211.c
1 /*
2 * iwinfo - Wireless Information Library - NL80211 Backend
3 *
4 * Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
5 *
6 * The iwinfo library is free software: you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
9 *
10 * The iwinfo library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 * See the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with the iwinfo library. If not, see http://www.gnu.org/licenses/.
17 *
18 * The signal handling code is derived from the official madwifi tools,
19 * wlanconfig.c in particular. The encryption property handling was
20 * inspired by the hostapd madwifi driver.
21 *
22 * Parts of this code are derived from the Linux iw utility.
23 */
24
25 #include <sys/stat.h>
26 #include <limits.h>
27 #include <glob.h>
28 #include <fnmatch.h>
29 #include <stdarg.h>
30 #include <stdlib.h>
31
32 #include "iwinfo_nl80211.h"
33
34 #define min(x, y) ((x) < (y)) ? (x) : (y)
35
36 #define BIT(x) (1ULL<<(x))
37
38 static struct nl80211_state *nls = NULL;
39
40 static void nl80211_close(void)
41 {
42 if (nls)
43 {
44 if (nls->nlctrl)
45 genl_family_put(nls->nlctrl);
46
47 if (nls->nl80211)
48 genl_family_put(nls->nl80211);
49
50 if (nls->nl_sock)
51 nl_socket_free(nls->nl_sock);
52
53 if (nls->nl_cache)
54 nl_cache_free(nls->nl_cache);
55
56 free(nls);
57 nls = NULL;
58 }
59 }
60
61 static int nl80211_init(void)
62 {
63 int err, fd;
64
65 if (!nls)
66 {
67 nls = malloc(sizeof(struct nl80211_state));
68 if (!nls) {
69 err = -ENOMEM;
70 goto err;
71 }
72
73 memset(nls, 0, sizeof(*nls));
74
75 nls->nl_sock = nl_socket_alloc();
76 if (!nls->nl_sock) {
77 err = -ENOMEM;
78 goto err;
79 }
80
81 if (genl_connect(nls->nl_sock)) {
82 err = -ENOLINK;
83 goto err;
84 }
85
86 fd = nl_socket_get_fd(nls->nl_sock);
87 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
88 err = -EINVAL;
89 goto err;
90 }
91
92 if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
93 err = -ENOMEM;
94 goto err;
95 }
96
97 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
98 if (!nls->nl80211) {
99 err = -ENOENT;
100 goto err;
101 }
102
103 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
104 if (!nls->nlctrl) {
105 err = -ENOENT;
106 goto err;
107 }
108 }
109
110 return 0;
111
112
113 err:
114 nl80211_close();
115 return err;
116 }
117
118 static int nl80211_readint(const char *path)
119 {
120 int fd;
121 int rv = -1;
122 char buffer[16];
123
124 if ((fd = open(path, O_RDONLY)) > -1)
125 {
126 if (read(fd, buffer, sizeof(buffer)) > 0)
127 rv = atoi(buffer);
128
129 close(fd);
130 }
131
132 return rv;
133 }
134
135 static int nl80211_readstr(const char *path, char *buffer, int length)
136 {
137 int fd;
138 int rv = -1;
139
140 if ((fd = open(path, O_RDONLY)) > -1)
141 {
142 if ((rv = read(fd, buffer, length - 1)) > 0)
143 {
144 if (buffer[rv - 1] == '\n')
145 rv--;
146
147 buffer[rv] = 0;
148 }
149
150 close(fd);
151 }
152
153 return rv;
154 }
155
156 static int nl80211_get_band(int nla_type)
157 {
158 switch (nla_type)
159 {
160 case NL80211_BAND_2GHZ:
161 return IWINFO_BAND_24;
162 case NL80211_BAND_5GHZ:
163 return IWINFO_BAND_5;
164 case NL80211_BAND_6GHZ:
165 return IWINFO_BAND_6;
166 case NL80211_BAND_60GHZ:
167 return IWINFO_BAND_60;
168 }
169
170 return 0;
171 }
172
173
174 static int nl80211_msg_error(struct sockaddr_nl *nla,
175 struct nlmsgerr *err, void *arg)
176 {
177 int *ret = arg;
178 *ret = err->error;
179 return NL_STOP;
180 }
181
182 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
183 {
184 int *ret = arg;
185 *ret = 0;
186 return NL_SKIP;
187 }
188
189 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
190 {
191 int *ret = arg;
192 *ret = 0;
193 return NL_STOP;
194 }
195
196 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
197 {
198 return NL_SKIP;
199 }
200
201 static void nl80211_free(struct nl80211_msg_conveyor *cv)
202 {
203 if (cv)
204 {
205 if (cv->cb)
206 nl_cb_put(cv->cb);
207
208 if (cv->msg)
209 nlmsg_free(cv->msg);
210
211 cv->cb = NULL;
212 cv->msg = NULL;
213 }
214 }
215
216 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
217 int cmd, int flags)
218 {
219 static struct nl80211_msg_conveyor cv;
220
221 struct nl_msg *req = NULL;
222 struct nl_cb *cb = NULL;
223
224 req = nlmsg_alloc();
225 if (!req)
226 goto err;
227
228 cb = nl_cb_alloc(NL_CB_DEFAULT);
229 if (!cb)
230 goto err;
231
232 genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
233
234 cv.msg = req;
235 cv.cb = cb;
236
237 return &cv;
238
239 err:
240 if (req)
241 nlmsg_free(req);
242
243 return NULL;
244 }
245
246 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
247 {
248 if (nl80211_init() < 0)
249 return NULL;
250
251 return nl80211_new(nls->nlctrl, cmd, flags);
252 }
253
254 static const char *nl80211_phy_path_str(const char *phyname)
255 {
256 static char path[PATH_MAX];
257 const char *prefix = "/sys/devices/";
258 int prefix_len = strlen(prefix);
259 int buf_len, offset;
260 struct dirent *e;
261 char buf[512], *link;
262 int phy_idx;
263 int seq = 0;
264 DIR *d;
265
266 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", phyname);
267 phy_idx = nl80211_readint(buf);
268 if (phy_idx < 0)
269 return NULL;
270
271 buf_len = snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/device", phyname);
272 link = realpath(buf, path);
273 if (!link)
274 return NULL;
275
276 if (strncmp(link, prefix, prefix_len) != 0)
277 return NULL;
278
279 link += prefix_len;
280
281 prefix = "platform/";
282 prefix_len = strlen(prefix);
283 if (!strncmp(link, prefix, prefix_len) && strstr(link, "/pci"))
284 link += prefix_len;
285
286 snprintf(buf + buf_len, sizeof(buf) - buf_len, "/ieee80211");
287 d = opendir(buf);
288 if (!d)
289 return link;
290
291 while ((e = readdir(d)) != NULL) {
292 int cur_idx;
293
294 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", e->d_name);
295 cur_idx = nl80211_readint(buf);
296 if (cur_idx < 0)
297 continue;
298
299 if (cur_idx >= phy_idx)
300 continue;
301
302 seq++;
303 }
304
305 closedir(d);
306
307 if (!seq)
308 return link;
309
310 offset = link - path + strlen(link);
311 snprintf(path + offset, sizeof(path) - offset, "+%d", seq);
312
313 return link;
314 }
315
316 static int nl80211_phy_idx_from_path(const char *path)
317 {
318 char buf[512];
319 struct dirent *e;
320 const char *cur_path;
321 int cur_path_len;
322 int path_len;
323 int idx = -1;
324 DIR *d;
325
326 if (!path)
327 return -1;
328
329 path_len = strlen(path);
330 if (!path_len)
331 return -1;
332
333 d = opendir("/sys/class/ieee80211");
334 if (!d)
335 return -1;
336
337 while ((e = readdir(d)) != NULL) {
338 cur_path = nl80211_phy_path_str(e->d_name);
339 if (!cur_path)
340 continue;
341
342 cur_path_len = strlen(cur_path);
343 if (cur_path_len < path_len)
344 continue;
345
346 if (strcmp(cur_path + cur_path_len - path_len, path) != 0)
347 continue;
348
349 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", e->d_name);
350 idx = nl80211_readint(buf);
351
352 if (idx >= 0)
353 break;
354 }
355
356 closedir(d);
357
358 return idx;
359 }
360
361 static int nl80211_phy_idx_from_macaddr(const char *opt)
362 {
363 char buf[128];
364 int i, idx = -1;
365 glob_t gl;
366
367 if (!opt)
368 return -1;
369
370 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/*");
371 if (glob(buf, 0, NULL, &gl))
372 return -1;
373
374 for (i = 0; i < gl.gl_pathc; i++)
375 {
376 snprintf(buf, sizeof(buf), "%s/macaddress", gl.gl_pathv[i]);
377 if (nl80211_readstr(buf, buf, sizeof(buf)) <= 0)
378 continue;
379
380 if (fnmatch(opt, buf, FNM_CASEFOLD))
381 continue;
382
383 snprintf(buf, sizeof(buf), "%s/index", gl.gl_pathv[i]);
384 if ((idx = nl80211_readint(buf)) > -1)
385 break;
386 }
387
388 globfree(&gl);
389
390 return idx;
391 }
392
393 static int nl80211_phy_idx_from_phy(const char *opt)
394 {
395 char buf[128];
396
397 if (!opt)
398 return -1;
399
400 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", opt);
401 return nl80211_readint(buf);
402 }
403
404 static int nl80211_phy_idx_from_uci(const char *name)
405 {
406 struct uci_section *s;
407 const char *opt;
408 int idx = -1;
409
410 s = iwinfo_uci_get_radio(name, "mac80211");
411 if (!s)
412 goto out;
413
414 opt = uci_lookup_option_string(uci_ctx, s, "path");
415 idx = nl80211_phy_idx_from_path(opt);
416 if (idx >= 0)
417 goto out;
418
419 opt = uci_lookup_option_string(uci_ctx, s, "macaddr");
420 idx = nl80211_phy_idx_from_macaddr(opt);
421 if (idx >= 0)
422 goto out;
423
424 opt = uci_lookup_option_string(uci_ctx, s, "phy");
425 idx = nl80211_phy_idx_from_phy(opt);
426
427 out:
428 iwinfo_uci_free();
429 return idx;
430 }
431
432 static bool nl80211_is_ifname(const char *name)
433 {
434 struct stat st;
435 char buffer[PATH_MAX];
436
437 snprintf(buffer, sizeof(buffer), "/sys/class/net/%s", name);
438 return !lstat(buffer, &st);
439 }
440
441 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
442 int cmd, int flags)
443 {
444 unsigned int ifidx = 0;
445 int phyidx = -1;
446 struct nl80211_msg_conveyor *cv;
447
448 if (ifname == NULL)
449 return NULL;
450
451 if (nl80211_init() < 0)
452 return NULL;
453
454 if (!strncmp(ifname, "mon.", 4))
455 ifidx = if_nametoindex(&ifname[4]);
456 else if (nl80211_is_ifname(ifname))
457 ifidx = if_nametoindex(ifname);
458 else
459 {
460 phyidx = nl80211_phy_idx_from_phy(ifname);
461 if (phyidx < 0)
462 phyidx = nl80211_phy_idx_from_uci(ifname);
463 }
464
465 /* Valid ifidx must be greater than 0 */
466 if ((ifidx <= 0) && (phyidx < 0))
467 return NULL;
468
469 cv = nl80211_new(nls->nl80211, cmd, flags);
470 if (!cv)
471 return NULL;
472
473 if (ifidx > 0)
474 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
475 else if (phyidx > -1)
476 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
477
478 return cv;
479
480 nla_put_failure:
481 nl80211_free(cv);
482 return NULL;
483 }
484
485 static int nl80211_send(struct nl80211_msg_conveyor *cv,
486 int (*cb_func)(struct nl_msg *, void *),
487 void *cb_arg)
488 {
489 static struct nl80211_msg_conveyor rcv;
490 int err;
491
492 if (cb_func)
493 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
494 else
495 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
496
497 err = nl_send_auto_complete(nls->nl_sock, cv->msg);
498
499 if (err < 0)
500 goto out;
501
502 err = 1;
503
504 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
505 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
506 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
507
508 while (err > 0)
509 nl_recvmsgs(nls->nl_sock, cv->cb);
510
511 out:
512 nl80211_free(cv);
513 return err;
514 }
515
516 static int nl80211_request(const char *ifname, int cmd, int flags,
517 int (*cb_func)(struct nl_msg *, void *),
518 void *cb_arg)
519 {
520 struct nl80211_msg_conveyor *cv;
521
522 cv = nl80211_msg(ifname, cmd, flags);
523
524 if (!cv)
525 return -ENOMEM;
526
527 return nl80211_send(cv, cb_func, cb_arg);
528 }
529
530 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
531 {
532 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
533 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
534
535 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
536 genlmsg_attrlen(gnlh, 0), NULL);
537
538 return attr;
539 }
540
541 static int nl80211_get_protocol_features_cb(struct nl_msg *msg, void *arg)
542 {
543 uint32_t *features = arg;
544 struct nlattr **attr = nl80211_parse(msg);
545
546 if (attr[NL80211_ATTR_PROTOCOL_FEATURES])
547 *features = nla_get_u32(attr[NL80211_ATTR_PROTOCOL_FEATURES]);
548
549 return NL_SKIP;
550 }
551
552 static int nl80211_get_protocol_features(const char *ifname)
553 {
554 struct nl80211_msg_conveyor *req;
555 uint32_t features = 0;
556
557 req = nl80211_msg(ifname, NL80211_CMD_GET_PROTOCOL_FEATURES, 0);
558 if (req) {
559 nl80211_send(req, nl80211_get_protocol_features_cb, &features);
560 nl80211_free(req);
561 }
562
563 return features;
564 }
565
566 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
567 {
568 struct nl80211_group_conveyor *cv = arg;
569
570 struct nlattr **attr = nl80211_parse(msg);
571 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
572 struct nlattr *mgrp;
573 int mgrpidx;
574
575 if (!attr[CTRL_ATTR_MCAST_GROUPS])
576 return NL_SKIP;
577
578 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
579 {
580 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
581 nla_data(mgrp), nla_len(mgrp), NULL);
582
583 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
584 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
585 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
586 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
587 {
588 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
589 break;
590 }
591 }
592
593 return NL_SKIP;
594 }
595
596 static int nl80211_subscribe(const char *family, const char *group)
597 {
598 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
599 struct nl80211_msg_conveyor *req;
600 int err;
601
602 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
603 if (req)
604 {
605 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
606 err = nl80211_send(req, nl80211_subscribe_cb, &cv);
607
608 if (err)
609 return err;
610
611 return nl_socket_add_membership(nls->nl_sock, cv.id);
612
613 nla_put_failure:
614 nl80211_free(req);
615 }
616
617 return -ENOMEM;
618 }
619
620
621 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
622 {
623 struct nl80211_event_conveyor *cv = arg;
624 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
625
626 if (cv->wait[gnlh->cmd / 32] & (1 << (gnlh->cmd % 32)))
627 cv->recv = gnlh->cmd;
628
629 return NL_SKIP;
630 }
631
632 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
633 {
634 return NL_OK;
635 }
636
637 static int __nl80211_wait(const char *family, const char *group, ...)
638 {
639 struct nl80211_event_conveyor cv = { };
640 struct nl_cb *cb;
641 int err = 0;
642 int cmd;
643 va_list ap;
644
645 if (nl80211_subscribe(family, group))
646 return -ENOENT;
647
648 cb = nl_cb_alloc(NL_CB_DEFAULT);
649
650 if (!cb)
651 return -ENOMEM;
652
653 nl_cb_err(cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
654 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
655 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
656
657 va_start(ap, group);
658
659 for (cmd = va_arg(ap, int); cmd != 0; cmd = va_arg(ap, int))
660 cv.wait[cmd / 32] |= (1 << (cmd % 32));
661
662 va_end(ap);
663
664 while (!cv.recv && !err)
665 nl_recvmsgs(nls->nl_sock, cb);
666
667 nl_cb_put(cb);
668
669 return err;
670 }
671
672 #define nl80211_wait(family, group, ...) \
673 __nl80211_wait(family, group, __VA_ARGS__, 0)
674
675 /* This is linux's ieee80211_freq_khz_to_channel() which is:
676 * SPDX-License-Identifier: GPL-2.0
677 * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net>
678 * Copyright 2013-2014 Intel Mobile Communications GmbH
679 * Copyright 2017 Intel Deutschland GmbH
680 * Copyright (C) 2018-2022 Intel Corporation
681 */
682 static int nl80211_freq2channel(int freq)
683 {
684 if (freq == 2484)
685 return 14;
686 else if (freq < 2484)
687 return (freq - 2407) / 5;
688 else if (freq >= 4910 && freq <= 4980)
689 return (freq - 4000) / 5;
690 else if (freq < 5925)
691 return (freq - 5000) / 5;
692 else if (freq == 5935)
693 return 2;
694 else if (freq <= 45000) /* DMG band lower limit */
695 /* see 802.11ax D6.1 27.3.22.2 */
696 return (freq - 5950) / 5;
697 else if (freq >= 58320 && freq <= 70200)
698 return (freq - 56160) / 2160;
699 else
700 return 0;
701 }
702
703 /* This is linux's ieee80211_channel_to_freq_khz() which is:
704 * SPDX-License-Identifier: GPL-2.0
705 * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net>
706 * Copyright 2013-2014 Intel Mobile Communications GmbH
707 * Copyright 2017 Intel Deutschland GmbH
708 * Copyright (C) 2018-2022 Intel Corporation
709 */
710 static int nl80211_channel2freq(int channel, const char *band, bool ax)
711 {
712 if (channel < 1)
713 return 0;
714
715 if (!band || band[0] != 'a')
716 {
717 if (channel == 14)
718 return 2484;
719 else if (channel < 14)
720 return (channel * 5) + 2407;
721 }
722 else if (strcmp(band, "ad") == 0)
723 {
724 if (channel < 7)
725 return 56160 + 2160 * channel;
726 }
727 else if (ax)
728 {
729 if (channel == 2)
730 return 5935;
731 if (channel < 233)
732 return (channel * 5) + 5950;
733 }
734 else
735 {
736 if (channel >= 182 && channel <= 196)
737 return (channel * 5) + 4000;
738 else
739 return (channel * 5) + 5000;
740 }
741
742 return 0;
743 }
744
745 static uint8_t nl80211_freq2band(int freq)
746 {
747 if (freq >= 2412 && freq <= 2484)
748 return IWINFO_BAND_24;
749 else if (freq >= 5160 && freq <= 5885)
750 return IWINFO_BAND_5;
751 else if (freq >= 5925 && freq <= 7125)
752 return IWINFO_BAND_6;
753 else if (freq >= 58320 && freq <= 69120)
754 return IWINFO_BAND_60;
755
756 return 0;
757 }
758
759 static int nl80211_phyname_cb(struct nl_msg *msg, void *arg)
760 {
761 char *buf = arg;
762 struct nlattr **attr = nl80211_parse(msg);
763
764 if (attr[NL80211_ATTR_WIPHY_NAME])
765 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
766 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
767 else
768 buf[0] = 0;
769
770 return NL_SKIP;
771 }
772
773 static char * nl80211_ifname2phy(const char *ifname)
774 {
775 static char phy[32] = { 0 };
776
777 memset(phy, 0, sizeof(phy));
778
779 nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
780 nl80211_phyname_cb, phy);
781
782 return phy[0] ? phy : NULL;
783 }
784
785 static char * nl80211_phyidx2name(unsigned int idx)
786 {
787 struct nl80211_msg_conveyor *cv;
788 static char phy[32] = { 0 };
789
790 if (nl80211_init() < 0)
791 return NULL;
792
793 cv = nl80211_new(nls->nl80211, NL80211_CMD_GET_WIPHY, 0);
794 if (!cv)
795 return NULL;
796
797 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, idx);
798
799 memset(phy, 0, sizeof(phy));
800 nl80211_send(cv, nl80211_phyname_cb, phy);
801
802 return phy[0] ? phy : NULL;
803
804 nla_put_failure:
805 return NULL;
806 }
807
808 static char * nl80211_phy2ifname(const char *ifname)
809 {
810 int ifidx = -1, cifidx, lmode = 1, clmode, phyidx;
811 char buffer[512];
812 static char nif[IFNAMSIZ] = { 0 };
813 DIR *d;
814 struct dirent *e;
815
816 /* Only accept phy name in the form of phy%d or radio%d */
817 if (!ifname)
818 return NULL;
819
820 phyidx = nl80211_phy_idx_from_phy(ifname);
821 if (phyidx < 0)
822 phyidx = nl80211_phy_idx_from_uci(ifname);;
823 if (phyidx < 0)
824 return NULL;
825
826 memset(nif, 0, sizeof(nif));
827
828 if ((d = opendir("/sys/class/net")) != NULL)
829 {
830 while ((e = readdir(d)) != NULL)
831 {
832 snprintf(buffer, sizeof(buffer),
833 "/sys/class/net/%s/phy80211/index", e->d_name);
834 if (nl80211_readint(buffer) != phyidx)
835 continue;
836
837 snprintf(buffer, sizeof(buffer),
838 "/sys/class/net/%s/ifindex", e->d_name);
839 cifidx = nl80211_readint(buffer);
840
841 if (cifidx < 0)
842 continue;
843
844 snprintf(buffer, sizeof(buffer),
845 "/sys/class/net/%s/link_mode", e->d_name);
846 clmode = nl80211_readint(buffer);
847
848 /* prefer non-supplicant-based devices */
849 if ((ifidx < 0) || (cifidx < ifidx) || ((lmode == 1) && (clmode != 1)))
850 {
851 ifidx = cifidx;
852 lmode = clmode;
853 strncpy(nif, e->d_name, sizeof(nif) - 1);
854 }
855 }
856
857 closedir(d);
858 }
859
860 return nif[0] ? nif : NULL;
861 }
862
863 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
864 {
865 int *mode = arg;
866 struct nlattr **tb = nl80211_parse(msg);
867 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
868 IWINFO_OPMODE_UNKNOWN, /* unspecified */
869 IWINFO_OPMODE_ADHOC, /* IBSS */
870 IWINFO_OPMODE_CLIENT, /* managed */
871 IWINFO_OPMODE_MASTER, /* AP */
872 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
873 IWINFO_OPMODE_WDS, /* WDS */
874 IWINFO_OPMODE_MONITOR, /* monitor */
875 IWINFO_OPMODE_MESHPOINT, /* mesh point */
876 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
877 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
878 };
879
880 if (tb[NL80211_ATTR_IFTYPE])
881 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
882
883 return NL_SKIP;
884 }
885
886
887 static int nl80211_get_mode(const char *ifname, int *buf)
888 {
889 char *res;
890
891 *buf = IWINFO_OPMODE_UNKNOWN;
892
893 res = nl80211_phy2ifname(ifname);
894
895 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
896 nl80211_get_mode_cb, buf);
897
898 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
899 }
900
901 static int __nl80211_hostapd_query(const char *ifname, ...)
902 {
903 va_list ap, ap_cur;
904 char *phy, *search, *dest, *key, *val, buf[128];
905 int len, mode, found = 0, match = 1;
906 FILE *fp;
907
908 if (nl80211_get_mode(ifname, &mode))
909 return 0;
910
911 if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN)
912 return 0;
913
914 phy = nl80211_ifname2phy(ifname);
915
916 if (!phy)
917 return 0;
918
919 snprintf(buf, sizeof(buf), "/var/run/hostapd-%s.conf", phy);
920 fp = fopen(buf, "r");
921
922 if (!fp)
923 return 0;
924
925 va_start(ap, ifname);
926
927 /* clear all destination buffers */
928 va_copy(ap_cur, ap);
929
930 while ((search = va_arg(ap_cur, char *)) != NULL)
931 {
932 dest = va_arg(ap_cur, char *);
933 len = va_arg(ap_cur, int);
934
935 memset(dest, 0, len);
936 }
937
938 va_end(ap_cur);
939
940 /* iterate applicable lines and copy found values into dest buffers */
941 while (fgets(buf, sizeof(buf), fp))
942 {
943 key = strtok(buf, " =\t\n");
944 val = strtok(NULL, "\n");
945
946 if (!key || !val || !*key || *key == '#')
947 continue;
948
949 if (!strcmp(key, "interface") || !strcmp(key, "bss"))
950 match = !strcmp(ifname, val);
951
952 if (!match)
953 continue;
954
955 va_copy(ap_cur, ap);
956
957 while ((search = va_arg(ap_cur, char *)) != NULL)
958 {
959 dest = va_arg(ap_cur, char *);
960 len = va_arg(ap_cur, int);
961
962 if (!strcmp(search, key))
963 {
964 strncpy(dest, val, len - 1);
965 found++;
966 break;
967 }
968 }
969
970 va_end(ap_cur);
971 }
972
973 fclose(fp);
974
975 va_end(ap);
976
977 return found;
978 }
979
980 #define nl80211_hostapd_query(ifname, ...) \
981 __nl80211_hostapd_query(ifname, ##__VA_ARGS__, NULL)
982
983
984 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
985 {
986 fd_set rfds;
987 struct timeval tv = { 0, 256000 };
988
989 FD_ZERO(&rfds);
990 FD_SET(sock, &rfds);
991
992 memset(buf, 0, blen);
993
994 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
995 return -1;
996
997 if (!FD_ISSET(sock, &rfds))
998 return -1;
999
1000 return recv(sock, buf, blen - 1, 0);
1001 }
1002
1003 static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local)
1004 {
1005 struct sockaddr_un remote = { 0 };
1006 size_t remote_length, local_length;
1007
1008 int sock = socket(PF_UNIX, SOCK_DGRAM, 0);
1009 if (sock < 0)
1010 return sock;
1011
1012 remote.sun_family = AF_UNIX;
1013 remote_length = sizeof(remote.sun_family) +
1014 sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname);
1015
1016 /* Set client socket file permissions so that bind() creates the client
1017 * socket with these permissions and there is no need to try to change
1018 * them with chmod() after bind() which would have potential issues with
1019 * race conditions. These permissions are needed to make sure the server
1020 * side (wpa_supplicant or hostapd) can reply to the control interface
1021 * messages.
1022 *
1023 * The lchown() calls below after bind() are also part of the needed
1024 * operations to allow the response to go through. Those are using the
1025 * no-deference-symlinks version to avoid races. */
1026 fchmod(sock, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
1027
1028 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
1029 {
1030 close(sock);
1031 return -1;
1032 }
1033
1034 if (connect(sock, (struct sockaddr *)&remote, remote_length))
1035 {
1036 close(sock);
1037 return -1;
1038 }
1039
1040 local->sun_family = AF_UNIX;
1041 local_length = sizeof(local->sun_family) +
1042 sprintf(local->sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
1043
1044 if (bind(sock, (struct sockaddr *)local, local_length) < 0)
1045 {
1046 close(sock);
1047 return -1;
1048 }
1049
1050 /* Set group even if we do not have privileges to change owner */
1051 lchown(local->sun_path, -1, 101);
1052 lchown(local->sun_path, 101, 101);
1053
1054 return sock;
1055 }
1056
1057 static int __nl80211_wpactl_query(const char *ifname, ...)
1058 {
1059 va_list ap, ap_cur;
1060 struct sockaddr_un local = { 0 };
1061 int len, mode, found = 0, sock = -1;
1062 char *search, *dest, *key, *val, *line, *pos, buf[512];
1063
1064 if (nl80211_get_mode(ifname, &mode))
1065 return 0;
1066
1067 if (mode != IWINFO_OPMODE_CLIENT &&
1068 mode != IWINFO_OPMODE_ADHOC &&
1069 mode != IWINFO_OPMODE_MESHPOINT)
1070 return 0;
1071
1072 sock = nl80211_wpactl_connect(ifname, &local);
1073
1074 if (sock < 0)
1075 return 0;
1076
1077 va_start(ap, ifname);
1078
1079 /* clear all destination buffers */
1080 va_copy(ap_cur, ap);
1081
1082 while ((search = va_arg(ap_cur, char *)) != NULL)
1083 {
1084 dest = va_arg(ap_cur, char *);
1085 len = va_arg(ap_cur, int);
1086
1087 memset(dest, 0, len);
1088 }
1089
1090 va_end(ap_cur);
1091
1092 send(sock, "STATUS", 6, 0);
1093
1094 while (true)
1095 {
1096 if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0)
1097 break;
1098
1099 if (buf[0] == '<')
1100 continue;
1101
1102 for (line = strtok_r(buf, "\n", &pos);
1103 line != NULL;
1104 line = strtok_r(NULL, "\n", &pos))
1105 {
1106 key = strtok(line, "=");
1107 val = strtok(NULL, "\n");
1108
1109 if (!key || !val)
1110 continue;
1111
1112 va_copy(ap_cur, ap);
1113
1114 while ((search = va_arg(ap_cur, char *)) != NULL)
1115 {
1116 dest = va_arg(ap_cur, char *);
1117 len = va_arg(ap_cur, int);
1118
1119 if (!strcmp(search, key))
1120 {
1121 strncpy(dest, val, len - 1);
1122 found++;
1123 break;
1124 }
1125 }
1126
1127 va_end(ap_cur);
1128 }
1129
1130 break;
1131 }
1132
1133 va_end(ap);
1134
1135 close(sock);
1136 unlink(local.sun_path);
1137
1138 return found;
1139 }
1140
1141 #define nl80211_wpactl_query(ifname, ...) \
1142 __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL)
1143
1144
1145 static char * nl80211_ifadd(const char *ifname)
1146 {
1147 char path[PATH_MAX];
1148 static char nif[IFNAMSIZ] = { 0 };
1149 struct nl80211_msg_conveyor *req;
1150 FILE *sysfs;
1151
1152 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
1153 if (req)
1154 {
1155 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
1156
1157 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
1158 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
1159
1160 nl80211_send(req, NULL, NULL);
1161
1162 snprintf(path, sizeof(path) - 1,
1163 "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif);
1164
1165 if ((sysfs = fopen(path, "w")) != NULL)
1166 {
1167 fwrite("0\n", 1, 2, sysfs);
1168 fclose(sysfs);
1169 }
1170
1171 return nif;
1172
1173 nla_put_failure:
1174 nl80211_free(req);
1175 }
1176
1177 return NULL;
1178 }
1179
1180 static void nl80211_ifdel(const char *ifname)
1181 {
1182 struct nl80211_msg_conveyor *req;
1183
1184 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
1185 if (req)
1186 {
1187 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
1188
1189 nl80211_send(req, NULL, NULL);
1190 return;
1191
1192 nla_put_failure:
1193 nl80211_free(req);
1194 }
1195 }
1196
1197 static void nl80211_hostapd_hup(const char *ifname)
1198 {
1199 int fd, pid = 0;
1200 char buf[32];
1201 char *phy = nl80211_ifname2phy(ifname);
1202
1203 if (phy)
1204 {
1205 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
1206 if ((fd = open(buf, O_RDONLY)) >= 0)
1207 {
1208 if (read(fd, buf, sizeof(buf)) > 0)
1209 pid = atoi(buf);
1210
1211 close(fd);
1212 }
1213
1214 if (pid > 0)
1215 kill(pid, 1);
1216 }
1217 }
1218
1219
1220 static int nl80211_probe(const char *ifname)
1221 {
1222 return !!nl80211_ifname2phy(ifname);
1223 }
1224
1225 struct nl80211_ssid_bssid {
1226 unsigned char *ssid;
1227 unsigned char bssid[7];
1228 };
1229
1230 static int nl80211_get_macaddr_cb(struct nl_msg *msg, void *arg)
1231 {
1232 struct nl80211_ssid_bssid *sb = arg;
1233 struct nlattr **tb = nl80211_parse(msg);
1234
1235 if (tb[NL80211_ATTR_MAC]) {
1236 sb->bssid[0] = 1;
1237 memcpy(sb->bssid + 1, nla_data(tb[NL80211_ATTR_MAC]),
1238 sizeof(sb->bssid) - 1);
1239 }
1240
1241 return NL_SKIP;
1242 }
1243
1244 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
1245 {
1246 int ielen;
1247 unsigned char *ie;
1248 struct nl80211_ssid_bssid *sb = arg;
1249 struct nlattr **tb = nl80211_parse(msg);
1250 struct nlattr *bss[NL80211_BSS_MAX + 1];
1251
1252 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1253 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
1254 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1255 };
1256
1257 if (!tb[NL80211_ATTR_BSS] ||
1258 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1259 bss_policy) ||
1260 !bss[NL80211_BSS_BSSID] ||
1261 !bss[NL80211_BSS_STATUS] ||
1262 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
1263 {
1264 return NL_SKIP;
1265 }
1266
1267 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
1268 {
1269 case NL80211_BSS_STATUS_ASSOCIATED:
1270 case NL80211_BSS_STATUS_AUTHENTICATED:
1271 case NL80211_BSS_STATUS_IBSS_JOINED:
1272
1273 if (sb->ssid)
1274 {
1275 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1276 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1277
1278 while (ielen >= 2 && ielen >= ie[1])
1279 {
1280 if (ie[0] == 0)
1281 {
1282 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1283 return NL_SKIP;
1284 }
1285
1286 ielen -= ie[1] + 2;
1287 ie += ie[1] + 2;
1288 }
1289 }
1290 else
1291 {
1292 sb->bssid[0] = 1;
1293 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
1294 return NL_SKIP;
1295 }
1296
1297 default:
1298 return NL_SKIP;
1299 }
1300 }
1301
1302 static int nl80211_get_ssid(const char *ifname, char *buf)
1303 {
1304 char *res;
1305 struct nl80211_ssid_bssid sb = { .ssid = (unsigned char *)buf };
1306
1307 /* try to find ssid from scan dump results */
1308 res = nl80211_phy2ifname(ifname);
1309 sb.ssid[0] = 0;
1310
1311 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1312 nl80211_get_ssid_bssid_cb, &sb);
1313
1314 /* failed, try to find from hostapd info */
1315 if (sb.ssid[0] == 0)
1316 nl80211_hostapd_query(ifname, "ssid", sb.ssid,
1317 IWINFO_ESSID_MAX_SIZE + 1);
1318
1319 /* failed, try to obtain Mesh ID */
1320 if (sb.ssid[0] == 0)
1321 iwinfo_ubus_query(res ? res : ifname, "mesh_id",
1322 buf, IWINFO_ESSID_MAX_SIZE + 1);
1323
1324 return (sb.ssid[0] == 0) ? -1 : 0;
1325 }
1326
1327 static int nl80211_get_bssid(const char *ifname, char *buf)
1328 {
1329 char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")];
1330 struct nl80211_ssid_bssid sb = { };
1331
1332 res = nl80211_phy2ifname(ifname);
1333
1334 /* try to obtain mac address via NL80211_CMD_GET_INTERFACE */
1335 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1336 nl80211_get_macaddr_cb, &sb);
1337
1338 /* failed, try to find bssid from scan dump results */
1339 if (sb.bssid[0] == 0)
1340 nl80211_request(res ? res : ifname,
1341 NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1342 nl80211_get_ssid_bssid_cb, &sb);
1343
1344 /* failed, try to find mac from hostapd info */
1345 if ((sb.bssid[0] == 0) &&
1346 nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid)))
1347 {
1348 sb.bssid[0] = 1;
1349 sb.bssid[1] = strtol(&bssid[0], NULL, 16);
1350 sb.bssid[2] = strtol(&bssid[3], NULL, 16);
1351 sb.bssid[3] = strtol(&bssid[6], NULL, 16);
1352 sb.bssid[4] = strtol(&bssid[9], NULL, 16);
1353 sb.bssid[5] = strtol(&bssid[12], NULL, 16);
1354 sb.bssid[6] = strtol(&bssid[15], NULL, 16);
1355 }
1356
1357 if (sb.bssid[0])
1358 {
1359 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
1360 sb.bssid[1], sb.bssid[2], sb.bssid[3],
1361 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
1362
1363 return 0;
1364 }
1365
1366 return -1;
1367 }
1368
1369
1370 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
1371 {
1372 int *freq = arg;
1373 struct nlattr **attr = nl80211_parse(msg);
1374 struct nlattr *binfo[NL80211_BSS_MAX + 1];
1375
1376 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1377 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1378 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1379 };
1380
1381 if (attr[NL80211_ATTR_BSS] &&
1382 !nla_parse_nested(binfo, NL80211_BSS_MAX,
1383 attr[NL80211_ATTR_BSS], bss_policy))
1384 {
1385 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
1386 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
1387 }
1388
1389 return NL_SKIP;
1390 }
1391
1392 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
1393 {
1394 int *freq = arg;
1395 struct nlattr **tb = nl80211_parse(msg);
1396
1397 if (tb[NL80211_ATTR_WIPHY_FREQ])
1398 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
1399
1400 return NL_SKIP;
1401 }
1402
1403 static int nl80211_get_frequency(const char *ifname, int *buf)
1404 {
1405 char *res, channel[4] = { 0 }, hwmode[3] = { 0 }, ax[2] = { 0 };
1406
1407 /* try to find frequency from interface info */
1408 res = nl80211_phy2ifname(ifname);
1409 *buf = 0;
1410
1411 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1412 nl80211_get_frequency_info_cb, buf);
1413
1414 /* failed, try to find frequency from hostapd info */
1415 if ((*buf == 0) &&
1416 nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode),
1417 "channel", channel, sizeof(channel),
1418 "ieee80211ax", ax, sizeof(ax)) >= 2)
1419 {
1420 *buf = nl80211_channel2freq(atoi(channel), hwmode, ax[0] == '1');
1421 }
1422
1423 /* failed, try to find frequency from scan results */
1424 if (*buf == 0)
1425 {
1426 res = nl80211_phy2ifname(ifname);
1427
1428 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1429 nl80211_get_frequency_scan_cb, buf);
1430 }
1431
1432 return (*buf == 0) ? -1 : 0;
1433 }
1434
1435 static int nl80211_get_center_freq1_cb(struct nl_msg *msg, void *arg)
1436 {
1437 int *freq = arg;
1438 struct nlattr **tb = nl80211_parse(msg);
1439
1440 if (tb[NL80211_ATTR_CENTER_FREQ1])
1441 *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ1]);
1442
1443 return NL_SKIP;
1444 }
1445
1446 static int nl80211_get_center_freq1(const char *ifname, int *buf)
1447 {
1448 char *res;
1449
1450 /* try to find frequency from interface info */
1451 res = nl80211_phy2ifname(ifname);
1452 *buf = 0;
1453
1454 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1455 nl80211_get_center_freq1_cb, buf);
1456
1457 return (*buf == 0) ? -1 : 0;
1458 }
1459
1460 static int nl80211_get_center_freq2_cb(struct nl_msg *msg, void *arg)
1461 {
1462 int *freq = arg;
1463 struct nlattr **tb = nl80211_parse(msg);
1464
1465 if (tb[NL80211_ATTR_CENTER_FREQ2])
1466 *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ2]);
1467
1468 return NL_SKIP;
1469 }
1470
1471 static int nl80211_get_center_freq2(const char *ifname, int *buf)
1472 {
1473 char *res;
1474
1475 /* try to find frequency from interface info */
1476 res = nl80211_phy2ifname(ifname);
1477 *buf = 0;
1478
1479 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1480 nl80211_get_center_freq2_cb, buf);
1481
1482 return (*buf == 0) ? -1 : 0;
1483 }
1484
1485 static int nl80211_get_channel(const char *ifname, int *buf)
1486 {
1487 if (!nl80211_get_frequency(ifname, buf))
1488 {
1489 *buf = nl80211_freq2channel(*buf);
1490 return 0;
1491 }
1492
1493 return -1;
1494 }
1495
1496 static int nl80211_get_center_chan1(const char *ifname, int *buf)
1497 {
1498 if (!nl80211_get_center_freq1(ifname, buf))
1499 {
1500 *buf = nl80211_freq2channel(*buf);
1501 return 0;
1502 }
1503
1504 return -1;
1505 }
1506
1507 static int nl80211_get_center_chan2(const char *ifname, int *buf)
1508 {
1509 if (!nl80211_get_center_freq2(ifname, buf))
1510 {
1511 *buf = nl80211_freq2channel(*buf);
1512 return 0;
1513 }
1514
1515 return -1;
1516 }
1517
1518 static int nl80211_get_txpower_cb(struct nl_msg *msg, void *arg)
1519 {
1520 int *buf = arg;
1521 struct nlattr **tb = nl80211_parse(msg);
1522
1523 if (tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL])
1524 *buf = iwinfo_mbm2dbm(nla_get_u32(tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL]));
1525
1526 return NL_SKIP;
1527 }
1528
1529 static int nl80211_get_txpower(const char *ifname, int *buf)
1530 {
1531 char *res;
1532
1533 res = nl80211_phy2ifname(ifname);
1534 *buf = 0;
1535
1536 if (nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1537 nl80211_get_txpower_cb, buf))
1538 return -1;
1539
1540 return 0;
1541 }
1542
1543
1544 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1545 {
1546 int8_t dbm;
1547 int16_t mbit;
1548 struct nl80211_rssi_rate *rr = arg;
1549 struct nlattr **attr = nl80211_parse(msg);
1550 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1551 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1552
1553 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1554 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1555 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1556 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1557 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1558 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1559 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1560 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1561 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1562 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1563 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1564 };
1565
1566 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1567 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1568 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1569 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1570 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1571 };
1572
1573 if (attr[NL80211_ATTR_STA_INFO])
1574 {
1575 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1576 attr[NL80211_ATTR_STA_INFO], stats_policy))
1577 {
1578 if (sinfo[NL80211_STA_INFO_SIGNAL])
1579 {
1580 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1581 rr->rssi = (rr->rssi * rr->rssi_samples + dbm) / (rr->rssi_samples + 1);
1582 rr->rssi_samples++;
1583 }
1584
1585 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1586 {
1587 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1588 sinfo[NL80211_STA_INFO_TX_BITRATE],
1589 rate_policy))
1590 {
1591 if (rinfo[NL80211_RATE_INFO_BITRATE])
1592 {
1593 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1594 rr->rate = (rr->rate * rr->rate_samples + mbit) / (rr->rate_samples + 1);
1595 rr->rate_samples++;
1596 }
1597 }
1598 }
1599 }
1600 }
1601
1602 return NL_SKIP;
1603 }
1604
1605 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1606 {
1607 DIR *d;
1608 struct dirent *de;
1609
1610 memset(r, 0, sizeof(*r));
1611
1612 if ((d = opendir("/sys/class/net")) != NULL)
1613 {
1614 while ((de = readdir(d)) != NULL)
1615 {
1616 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1617 (!de->d_name[strlen(ifname)] ||
1618 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1619 {
1620 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
1621 NLM_F_DUMP, nl80211_fill_signal_cb, r);
1622 }
1623 }
1624
1625 closedir(d);
1626 }
1627 }
1628
1629 static int nl80211_get_bitrate(const char *ifname, int *buf)
1630 {
1631 struct nl80211_rssi_rate rr;
1632
1633 nl80211_fill_signal(ifname, &rr);
1634
1635 if (rr.rate_samples)
1636 {
1637 *buf = (rr.rate * 100);
1638 return 0;
1639 }
1640
1641 return -1;
1642 }
1643
1644 static int nl80211_get_signal(const char *ifname, int *buf)
1645 {
1646 struct nl80211_rssi_rate rr;
1647
1648 nl80211_fill_signal(ifname, &rr);
1649
1650 if (rr.rssi_samples)
1651 {
1652 *buf = rr.rssi;
1653 return 0;
1654 }
1655
1656 return -1;
1657 }
1658
1659 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1660 {
1661 int8_t *noise = arg;
1662 struct nlattr **tb = nl80211_parse(msg);
1663 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1664
1665 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1666 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1667 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1668 };
1669
1670 if (!tb[NL80211_ATTR_SURVEY_INFO])
1671 return NL_SKIP;
1672
1673 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1674 tb[NL80211_ATTR_SURVEY_INFO], sp))
1675 return NL_SKIP;
1676
1677 if (!si[NL80211_SURVEY_INFO_NOISE])
1678 return NL_SKIP;
1679
1680 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1681 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1682
1683 return NL_SKIP;
1684 }
1685
1686
1687 static int nl80211_get_noise(const char *ifname, int *buf)
1688 {
1689 int8_t noise = 0;
1690
1691 if (nl80211_request(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP,
1692 nl80211_get_noise_cb, &noise))
1693 goto out;
1694
1695 *buf = noise;
1696 return 0;
1697
1698 out:
1699 *buf = 0;
1700 return -1;
1701 }
1702
1703 static int nl80211_get_quality(const char *ifname, int *buf)
1704 {
1705 int signal;
1706
1707 if (!nl80211_get_signal(ifname, &signal))
1708 {
1709 /* A positive signal level is usually just a quality
1710 * value, pass through as-is */
1711 if (signal >= 0)
1712 {
1713 *buf = signal;
1714 }
1715
1716 /* The cfg80211 wext compat layer assumes a signal range
1717 * of -110 dBm to -40 dBm, the quality value is derived
1718 * by adding 110 to the signal level */
1719 else
1720 {
1721 if (signal < -110)
1722 signal = -110;
1723 else if (signal > -40)
1724 signal = -40;
1725
1726 *buf = (signal + 110);
1727 }
1728
1729 return 0;
1730 }
1731
1732 return -1;
1733 }
1734
1735 static int nl80211_get_quality_max(const char *ifname, int *buf)
1736 {
1737 /* The cfg80211 wext compat layer assumes a maximum
1738 * quality of 70 */
1739 *buf = 70;
1740
1741 return 0;
1742 }
1743
1744 static int nl80211_check_wepkey(const char *key)
1745 {
1746 if (key && *key)
1747 {
1748 switch (strlen(key))
1749 {
1750 case 5:
1751 case 10:
1752 return IWINFO_CIPHER_WEP40;
1753
1754 case 13:
1755 case 26:
1756 return IWINFO_CIPHER_WEP104;
1757 }
1758 }
1759
1760 return 0;
1761 }
1762
1763 static struct {
1764 const char *match;
1765 int version;
1766 int suite;
1767 } wpa_key_mgmt_strings[] = {
1768 { "IEEE 802.1X/EAP", 0, IWINFO_KMGMT_8021x },
1769 { "EAP-SUITE-B-192", 4, IWINFO_KMGMT_8021x },
1770 { "EAP-SUITE-B", 4, IWINFO_KMGMT_8021x },
1771 { "EAP-SHA384", 4, IWINFO_KMGMT_8021x },
1772 { "EAP-SHA256", 0, IWINFO_KMGMT_8021x },
1773 { "PSK-SHA256", 0, IWINFO_KMGMT_PSK },
1774 { "NONE", 0, IWINFO_KMGMT_NONE },
1775 { "None", 0, IWINFO_KMGMT_NONE },
1776 { "PSK", 0, IWINFO_KMGMT_PSK },
1777 { "EAP", 0, IWINFO_KMGMT_8021x },
1778 { "SAE", 4, IWINFO_KMGMT_SAE },
1779 { "OWE", 4, IWINFO_KMGMT_OWE }
1780 };
1781
1782 static void parse_wpa_suites(const char *str, int defversion,
1783 uint8_t *versions, uint8_t *suites)
1784 {
1785 size_t l;
1786 int i, version;
1787 const char *p, *q, *m, *sep = " \t\n,-+/";
1788
1789 for (p = str; *p; )
1790 {
1791 q = p;
1792
1793 for (i = 0; i < ARRAY_SIZE(wpa_key_mgmt_strings); i++)
1794 {
1795 m = wpa_key_mgmt_strings[i].match;
1796 l = strlen(m);
1797
1798 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l])))
1799 {
1800 if (wpa_key_mgmt_strings[i].version != 0)
1801 version = wpa_key_mgmt_strings[i].version;
1802 else
1803 version = defversion;
1804
1805 *versions |= version;
1806 *suites |= wpa_key_mgmt_strings[i].suite;
1807
1808 q += l;
1809 break;
1810 }
1811 }
1812
1813 if (q == p)
1814 q += strcspn(q, sep);
1815
1816 p = q + strspn(q, sep);
1817 }
1818 }
1819
1820 static struct {
1821 const char *match;
1822 int cipher;
1823 } wpa_cipher_strings[] = {
1824 { "WEP-104", IWINFO_CIPHER_WEP104 },
1825 { "WEP-40", IWINFO_CIPHER_WEP40 },
1826 { "NONE", IWINFO_CIPHER_NONE },
1827 { "TKIP", IWINFO_CIPHER_TKIP },
1828 { "CCMP-256",IWINFO_CIPHER_CCMP256 },
1829 { "CCMP", IWINFO_CIPHER_CCMP },
1830 { "GCMP-256",IWINFO_CIPHER_GCMP256 },
1831 { "GCMP", IWINFO_CIPHER_GCMP }
1832 };
1833
1834 static void parse_wpa_ciphers(const char *str, uint16_t *ciphers)
1835 {
1836 int i;
1837 size_t l;
1838 const char *m, *p, *q, *sep = " \t\n,-+/";
1839
1840 for (p = str; *p; )
1841 {
1842 q = p;
1843
1844 for (i = 0; i < ARRAY_SIZE(wpa_cipher_strings); i++)
1845 {
1846 m = wpa_cipher_strings[i].match;
1847 l = strlen(m);
1848
1849 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l])))
1850 {
1851 *ciphers |= wpa_cipher_strings[i].cipher;
1852
1853 q += l;
1854 break;
1855 }
1856 }
1857
1858 if (q == p)
1859 q += strcspn(q, sep);
1860
1861 p = q + strspn(q, sep);
1862 }
1863 }
1864
1865 static int nl80211_get_encryption(const char *ifname, char *buf)
1866 {
1867 char *p;
1868 int opmode;
1869 uint8_t wpa_version = 0;
1870 char wpa[2], wpa_key_mgmt[64], wpa_pairwise[16], wpa_groupwise[16];
1871 char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27];
1872 char mode[16];
1873
1874 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1875
1876 /* WPA supplicant */
1877 if (nl80211_wpactl_query(ifname,
1878 "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise),
1879 "group_cipher", wpa_groupwise, sizeof(wpa_groupwise),
1880 "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1881 "mode", mode, sizeof(mode)))
1882 {
1883 /* WEP or Open */
1884 if (!strcmp(wpa_key_mgmt, "NONE"))
1885 {
1886 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1887 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers);
1888
1889 if (c->pair_ciphers != 0 && c->pair_ciphers != IWINFO_CIPHER_NONE) {
1890 c->enabled = 1;
1891 c->auth_suites = IWINFO_KMGMT_NONE;
1892 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1893 }
1894 else {
1895 c->pair_ciphers = 0;
1896 c->group_ciphers = 0;
1897 }
1898 }
1899
1900 /* MESH with SAE */
1901 else if (!strcmp(mode, "mesh") && !strcmp(wpa_key_mgmt, "UNKNOWN"))
1902 {
1903 c->enabled = 1;
1904 c->wpa_version = 4;
1905 c->auth_suites = IWINFO_KMGMT_SAE;
1906 c->pair_ciphers = IWINFO_CIPHER_CCMP;
1907 c->group_ciphers = IWINFO_CIPHER_CCMP;
1908 }
1909
1910 /* WPA */
1911 else
1912 {
1913 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1914 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers);
1915
1916 p = wpa_key_mgmt;
1917
1918 if (!strncmp(p, "WPA2-", 5) || !strncmp(p, "WPA2/", 5))
1919 {
1920 p += 5;
1921 wpa_version = 2;
1922 }
1923 else if (!strncmp(p, "WPA-", 4))
1924 {
1925 p += 4;
1926 wpa_version = 1;
1927 }
1928
1929 parse_wpa_suites(p, wpa_version, &c->wpa_version, &c->auth_suites);
1930
1931 c->enabled = !!(c->wpa_version && c->auth_suites);
1932 }
1933
1934 return 0;
1935 }
1936
1937 /* Hostapd */
1938 else if (nl80211_hostapd_query(ifname,
1939 "wpa", wpa, sizeof(wpa),
1940 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1941 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise),
1942 "auth_algs", auth_algs, sizeof(auth_algs),
1943 "wep_key0", wep_key0, sizeof(wep_key0),
1944 "wep_key1", wep_key1, sizeof(wep_key1),
1945 "wep_key2", wep_key2, sizeof(wep_key2),
1946 "wep_key3", wep_key3, sizeof(wep_key3)))
1947 {
1948 c->wpa_version = 0;
1949
1950 if (wpa_key_mgmt[0])
1951 {
1952 for (p = strtok(wpa_key_mgmt, " \t"); p != NULL; p = strtok(NULL, " \t"))
1953 {
1954 if (!strncmp(p, "WPA-", 4))
1955 p += 4;
1956
1957 if (!strncmp(p, "FT-", 3))
1958 p += 3;
1959
1960 parse_wpa_suites(p, atoi(wpa), &c->wpa_version, &c->auth_suites);
1961 }
1962
1963 c->enabled = c->wpa_version ? 1 : 0;
1964 }
1965
1966 if (wpa_pairwise[0])
1967 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1968
1969 if (auth_algs[0])
1970 {
1971 switch (atoi(auth_algs))
1972 {
1973 case 1:
1974 c->auth_algs |= IWINFO_AUTH_OPEN;
1975 break;
1976
1977 case 2:
1978 c->auth_algs |= IWINFO_AUTH_SHARED;
1979 break;
1980
1981 case 3:
1982 c->auth_algs |= IWINFO_AUTH_OPEN;
1983 c->auth_algs |= IWINFO_AUTH_SHARED;
1984 break;
1985 }
1986
1987 c->pair_ciphers |= nl80211_check_wepkey(wep_key0);
1988 c->pair_ciphers |= nl80211_check_wepkey(wep_key1);
1989 c->pair_ciphers |= nl80211_check_wepkey(wep_key2);
1990 c->pair_ciphers |= nl80211_check_wepkey(wep_key3);
1991
1992 c->enabled = (c->auth_algs && c->pair_ciphers) ? 1 : 0;
1993 }
1994
1995 c->group_ciphers = c->pair_ciphers;
1996
1997 return 0;
1998 }
1999
2000 /* Ad-Hoc or Mesh interfaces without wpa_supplicant are open */
2001 else if (!nl80211_get_mode(ifname, &opmode) &&
2002 (opmode == IWINFO_OPMODE_ADHOC ||
2003 opmode == IWINFO_OPMODE_MESHPOINT))
2004 {
2005 c->enabled = 0;
2006
2007 return 0;
2008 }
2009
2010
2011 return -1;
2012 }
2013
2014 static int nl80211_get_phyname(const char *ifname, char *buf)
2015 {
2016 const char *name;
2017
2018 name = nl80211_ifname2phy(ifname);
2019
2020 if (name)
2021 {
2022 strcpy(buf, name);
2023 return 0;
2024 }
2025 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
2026 {
2027 name = nl80211_ifname2phy(name);
2028
2029 if (name)
2030 {
2031 strcpy(buf, ifname);
2032 return 0;
2033 }
2034 }
2035
2036 return -1;
2037 }
2038
2039
2040 static void nl80211_parse_rateinfo(struct nlattr **ri,
2041 struct iwinfo_rate_entry *re)
2042 {
2043 if (ri[NL80211_RATE_INFO_BITRATE32])
2044 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100;
2045 else if (ri[NL80211_RATE_INFO_BITRATE])
2046 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100;
2047
2048 if (ri[NL80211_RATE_INFO_HE_MCS])
2049 {
2050 re->is_he = 1;
2051 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_HE_MCS]);
2052
2053 if (ri[NL80211_RATE_INFO_HE_NSS])
2054 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_HE_NSS]);
2055 if (ri[NL80211_RATE_INFO_HE_GI])
2056 re->he_gi = nla_get_u8(ri[NL80211_RATE_INFO_HE_GI]);
2057 if (ri[NL80211_RATE_INFO_HE_DCM])
2058 re->he_dcm = nla_get_u8(ri[NL80211_RATE_INFO_HE_DCM]);
2059 }
2060 else if (ri[NL80211_RATE_INFO_VHT_MCS])
2061 {
2062 re->is_vht = 1;
2063 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]);
2064
2065 if (ri[NL80211_RATE_INFO_VHT_NSS])
2066 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]);
2067 }
2068 else if (ri[NL80211_RATE_INFO_MCS])
2069 {
2070 re->is_ht = 1;
2071 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]);
2072 }
2073
2074 if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH])
2075 re->mhz = 5;
2076 else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH])
2077 re->mhz = 10;
2078 else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH])
2079 re->mhz = 40;
2080 else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH])
2081 re->mhz = 80;
2082 else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] ||
2083 ri[NL80211_RATE_INFO_160_MHZ_WIDTH])
2084 re->mhz = 160;
2085 else
2086 re->mhz = 20;
2087
2088 if (ri[NL80211_RATE_INFO_SHORT_GI])
2089 re->is_short_gi = 1;
2090
2091 re->is_40mhz = (re->mhz == 40);
2092 }
2093
2094 static int nl80211_get_survey_cb(struct nl_msg *msg, void *arg)
2095 {
2096 struct nl80211_array_buf *arr = arg;
2097 struct iwinfo_survey_entry *e = arr->buf;
2098 struct nlattr **attr = nl80211_parse(msg);
2099 struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
2100 int rc;
2101
2102 static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
2103 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
2104 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
2105 [NL80211_SURVEY_INFO_TIME] = { .type = NLA_U64 },
2106 [NL80211_SURVEY_INFO_TIME_BUSY] = { .type = NLA_U64 },
2107 [NL80211_SURVEY_INFO_TIME_EXT_BUSY] = { .type = NLA_U64 },
2108 [NL80211_SURVEY_INFO_TIME_RX] = { .type = NLA_U64 },
2109 [NL80211_SURVEY_INFO_TIME_TX] = { .type = NLA_U64 },
2110 };
2111
2112 rc = nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
2113 attr[NL80211_ATTR_SURVEY_INFO],
2114 survey_policy);
2115 if (rc)
2116 return NL_SKIP;
2117
2118 /* advance to end of array */
2119 e += arr->count;
2120 memset(e, 0, sizeof(*e));
2121
2122 if (sinfo[NL80211_SURVEY_INFO_FREQUENCY])
2123 e->mhz = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]);
2124
2125 if (sinfo[NL80211_SURVEY_INFO_NOISE])
2126 e->noise = nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
2127
2128 if (sinfo[NL80211_SURVEY_INFO_TIME])
2129 e->active_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME]);
2130
2131 if (sinfo[NL80211_SURVEY_INFO_TIME_BUSY])
2132 e->busy_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_BUSY]);
2133
2134 if (sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY])
2135 e->busy_time_ext = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]);
2136
2137 if (sinfo[NL80211_SURVEY_INFO_TIME_RX])
2138 e->rxtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_RX]);
2139
2140 if (sinfo[NL80211_SURVEY_INFO_TIME_TX])
2141 e->txtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_TX]);
2142
2143 arr->count++;
2144 return NL_SKIP;
2145 }
2146
2147
2148 static void plink_state_to_str(char *dst, unsigned state)
2149 {
2150 switch (state) {
2151 case NL80211_PLINK_LISTEN:
2152 strcpy(dst, "LISTEN");
2153 break;
2154 case NL80211_PLINK_OPN_SNT:
2155 strcpy(dst, "OPN_SNT");
2156 break;
2157 case NL80211_PLINK_OPN_RCVD:
2158 strcpy(dst, "OPN_RCVD");
2159 break;
2160 case NL80211_PLINK_CNF_RCVD:
2161 strcpy(dst, "CNF_RCVD");
2162 break;
2163 case NL80211_PLINK_ESTAB:
2164 strcpy(dst, "ESTAB");
2165 break;
2166 case NL80211_PLINK_HOLDING:
2167 strcpy(dst, "HOLDING");
2168 break;
2169 case NL80211_PLINK_BLOCKED:
2170 strcpy(dst, "BLOCKED");
2171 break;
2172 default:
2173 strcpy(dst, "UNKNOWN");
2174 break;
2175 }
2176 }
2177
2178 static void power_mode_to_str(char *dst, struct nlattr *a)
2179 {
2180 enum nl80211_mesh_power_mode pm = nla_get_u32(a);
2181
2182 switch (pm) {
2183 case NL80211_MESH_POWER_ACTIVE:
2184 strcpy(dst, "ACTIVE");
2185 break;
2186 case NL80211_MESH_POWER_LIGHT_SLEEP:
2187 strcpy(dst, "LIGHT SLEEP");
2188 break;
2189 case NL80211_MESH_POWER_DEEP_SLEEP:
2190 strcpy(dst, "DEEP SLEEP");
2191 break;
2192 default:
2193 strcpy(dst, "UNKNOWN");
2194 break;
2195 }
2196 }
2197
2198 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
2199 {
2200 struct nl80211_array_buf *arr = arg;
2201 struct iwinfo_assoclist_entry *e = arr->buf;
2202 struct nlattr **attr = nl80211_parse(msg);
2203 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
2204 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
2205 struct nl80211_sta_flag_update *sta_flags;
2206
2207 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
2208 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
2209 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
2210 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
2211 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
2212 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
2213 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
2214 [NL80211_STA_INFO_SIGNAL_AVG] = { .type = NLA_U8 },
2215 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
2216 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
2217 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 },
2218 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
2219 [NL80211_STA_INFO_CONNECTED_TIME]= { .type = NLA_U32 },
2220 [NL80211_STA_INFO_RX_DROP_MISC] = { .type = NLA_U64 },
2221 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 },
2222 [NL80211_STA_INFO_STA_FLAGS] =
2223 { .minlen = sizeof(struct nl80211_sta_flag_update) },
2224 [NL80211_STA_INFO_EXPECTED_THROUGHPUT] = { .type = NLA_U32 },
2225 /* mesh */
2226 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
2227 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
2228 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
2229 [NL80211_STA_INFO_LOCAL_PM] = { .type = NLA_U32 },
2230 [NL80211_STA_INFO_PEER_PM] = { .type = NLA_U32 },
2231 [NL80211_STA_INFO_NONPEER_PM] = { .type = NLA_U32 },
2232 };
2233
2234 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
2235 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
2236 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
2237 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
2238 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
2239 };
2240
2241 /* advance to end of array */
2242 e += arr->count;
2243 memset(e, 0, sizeof(*e));
2244
2245 if (attr[NL80211_ATTR_MAC])
2246 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
2247
2248 if (attr[NL80211_ATTR_STA_INFO] &&
2249 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
2250 attr[NL80211_ATTR_STA_INFO], stats_policy))
2251 {
2252 if (sinfo[NL80211_STA_INFO_SIGNAL])
2253 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
2254
2255 if (sinfo[NL80211_STA_INFO_SIGNAL_AVG])
2256 e->signal_avg = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]);
2257
2258 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
2259 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
2260
2261 if (sinfo[NL80211_STA_INFO_CONNECTED_TIME])
2262 e->connected_time = nla_get_u32(sinfo[NL80211_STA_INFO_CONNECTED_TIME]);
2263
2264 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
2265 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
2266
2267 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
2268 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
2269
2270 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
2271 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
2272 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
2273 nl80211_parse_rateinfo(rinfo, &e->rx_rate);
2274
2275 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
2276 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
2277 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
2278 nl80211_parse_rateinfo(rinfo, &e->tx_rate);
2279
2280 if (sinfo[NL80211_STA_INFO_RX_BYTES])
2281 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
2282
2283 if (sinfo[NL80211_STA_INFO_TX_BYTES])
2284 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
2285
2286 if (sinfo[NL80211_STA_INFO_TX_RETRIES])
2287 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
2288
2289 if (sinfo[NL80211_STA_INFO_TX_FAILED])
2290 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
2291
2292 if (sinfo[NL80211_STA_INFO_T_OFFSET])
2293 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]);
2294
2295 if (sinfo[NL80211_STA_INFO_RX_DROP_MISC])
2296 e->rx_drop_misc = nla_get_u64(sinfo[NL80211_STA_INFO_RX_DROP_MISC]);
2297
2298 if (sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT])
2299 e->thr = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]);
2300
2301 /* mesh */
2302 if (sinfo[NL80211_STA_INFO_LLID])
2303 e->llid = nla_get_u16(sinfo[NL80211_STA_INFO_LLID]);
2304
2305 if (sinfo[NL80211_STA_INFO_PLID])
2306 e->plid = nla_get_u16(sinfo[NL80211_STA_INFO_PLID]);
2307
2308 if (sinfo[NL80211_STA_INFO_PLINK_STATE])
2309 plink_state_to_str(e->plink_state,
2310 nla_get_u8(sinfo[NL80211_STA_INFO_PLINK_STATE]));
2311
2312 if (sinfo[NL80211_STA_INFO_LOCAL_PM])
2313 power_mode_to_str(e->local_ps, sinfo[NL80211_STA_INFO_LOCAL_PM]);
2314 if (sinfo[NL80211_STA_INFO_PEER_PM])
2315 power_mode_to_str(e->peer_ps, sinfo[NL80211_STA_INFO_PEER_PM]);
2316 if (sinfo[NL80211_STA_INFO_NONPEER_PM])
2317 power_mode_to_str(e->nonpeer_ps, sinfo[NL80211_STA_INFO_NONPEER_PM]);
2318
2319 /* Station flags */
2320 if (sinfo[NL80211_STA_INFO_STA_FLAGS])
2321 {
2322 sta_flags = (struct nl80211_sta_flag_update *)
2323 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
2324
2325 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
2326 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
2327 e->is_authorized = 1;
2328
2329 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
2330 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
2331 e->is_authenticated = 1;
2332
2333 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
2334 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
2335 e->is_preamble_short = 1;
2336
2337 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
2338 sta_flags->set & BIT(NL80211_STA_FLAG_WME))
2339 e->is_wme = 1;
2340
2341 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
2342 sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
2343 e->is_mfp = 1;
2344
2345 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
2346 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2347 e->is_tdls = 1;
2348 }
2349 }
2350
2351 e->noise = 0; /* filled in by caller */
2352 arr->count++;
2353
2354 return NL_SKIP;
2355 }
2356
2357 static int nl80211_get_survey(const char *ifname, char *buf, int *len)
2358 {
2359 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2360 int rc;
2361
2362 rc = nl80211_request(ifname, NL80211_CMD_GET_SURVEY,
2363 NLM_F_DUMP, nl80211_get_survey_cb, &arr);
2364 if (!rc)
2365 *len = (arr.count * sizeof(struct iwinfo_survey_entry));
2366 else
2367 *len = 0;
2368
2369 return 0;
2370 }
2371
2372 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
2373 {
2374 DIR *d;
2375 int i, noise = 0;
2376 struct dirent *de;
2377 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2378 struct iwinfo_assoclist_entry *e;
2379
2380 if ((d = opendir("/sys/class/net")) != NULL)
2381 {
2382 while ((de = readdir(d)) != NULL)
2383 {
2384 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
2385 (!de->d_name[strlen(ifname)] ||
2386 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
2387 {
2388 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
2389 NLM_F_DUMP, nl80211_get_assoclist_cb, &arr);
2390 }
2391 }
2392
2393 closedir(d);
2394
2395 if (!nl80211_get_noise(ifname, &noise))
2396 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
2397 e->noise = noise;
2398
2399 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
2400 return 0;
2401 }
2402
2403 return -1;
2404 }
2405
2406 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
2407 {
2408 int *dbm_max = arg;
2409 int ch_cur, ch_cmp, bands_remain, freqs_remain;
2410
2411 struct nlattr **attr = nl80211_parse(msg);
2412 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2413 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2414 struct nlattr *band, *freq;
2415
2416 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2417 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2418 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2419 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2420 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2421 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2422 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2423 };
2424
2425 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
2426 *dbm_max = -1;
2427
2428 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2429 {
2430 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
2431 nla_len(band), NULL);
2432
2433 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2434 {
2435 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2436 nla_data(freq), nla_len(freq), freq_policy);
2437
2438 ch_cmp = nl80211_freq2channel(nla_get_u32(
2439 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
2440
2441 if ((!ch_cur || (ch_cmp == ch_cur)) &&
2442 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
2443 {
2444 *dbm_max = (int)(0.01 * nla_get_u32(
2445 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
2446
2447 break;
2448 }
2449 }
2450 }
2451
2452 return NL_SKIP;
2453 }
2454
2455 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
2456 {
2457 int err, ch_cur;
2458 int dbm_max = -1, dbm_cur, dbm_cnt;
2459 struct iwinfo_txpwrlist_entry entry;
2460
2461 if (nl80211_get_channel(ifname, &ch_cur))
2462 ch_cur = 0;
2463
2464 /* initialize the value pointer with channel for callback */
2465 dbm_max = ch_cur;
2466
2467 err = nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2468 nl80211_get_txpwrlist_cb, &dbm_max);
2469
2470 if (!err)
2471 {
2472 for (dbm_cur = 0, dbm_cnt = 0;
2473 dbm_cur < dbm_max;
2474 dbm_cur++, dbm_cnt++)
2475 {
2476 entry.dbm = dbm_cur;
2477 entry.mw = iwinfo_dbm2mw(dbm_cur);
2478
2479 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2480 }
2481
2482 entry.dbm = dbm_max;
2483 entry.mw = iwinfo_dbm2mw(dbm_max);
2484
2485 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2486 dbm_cnt++;
2487
2488 *len = dbm_cnt * sizeof(entry);
2489 return 0;
2490 }
2491
2492 return -1;
2493 }
2494
2495 static void nl80211_get_scancrypto(char *spec, struct iwinfo_crypto_entry *c)
2496 {
2497 int wpa_version = 0;
2498 char *p, *q, *proto, *suites;
2499
2500 c->enabled = 0;
2501
2502 for (p = strtok_r(spec, "[]", &q); p; p = strtok_r(NULL, "[]", &q)) {
2503 if (!strcmp(p, "WEP")) {
2504 c->enabled = 1;
2505 c->auth_suites = IWINFO_KMGMT_NONE;
2506 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2507 c->pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2508 break;
2509 }
2510
2511 proto = strtok(p, "-");
2512 suites = strtok(NULL, "]");
2513
2514 if (!proto || !suites)
2515 continue;
2516
2517 if (!strcmp(proto, "WPA2") || !strcmp(proto, "RSN"))
2518 wpa_version = 2;
2519 else if (!strcmp(proto, "WPA"))
2520 wpa_version = 1;
2521 else
2522 continue;
2523
2524 c->enabled = 1;
2525
2526 parse_wpa_suites(suites, wpa_version, &c->wpa_version, &c->auth_suites);
2527 parse_wpa_ciphers(suites, &c->pair_ciphers);
2528 }
2529 }
2530
2531
2532 struct nl80211_scanlist {
2533 struct iwinfo_scanlist_entry *e;
2534 int len;
2535 };
2536
2537
2538 static void nl80211_get_scanlist_ie(struct nlattr **bss,
2539 struct iwinfo_scanlist_entry *e)
2540 {
2541 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2542 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2543 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
2544 int len;
2545
2546 while (ielen >= 2 && ielen >= ie[1])
2547 {
2548 switch (ie[0])
2549 {
2550 case 0: /* SSID */
2551 case 114: /* Mesh ID */
2552 if (e->ssid[0] == 0) {
2553 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
2554 memcpy(e->ssid, ie + 2, len);
2555 e->ssid[len] = 0;
2556 }
2557 break;
2558
2559 case 48: /* RSN */
2560 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
2561 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
2562 break;
2563
2564 case 221: /* Vendor */
2565 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
2566 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
2567 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
2568 break;
2569 case 61: /* HT operation */
2570 if (ie[1] >= 3) {
2571 e->ht_chan_info.primary_chan = ie[2];
2572 e->ht_chan_info.secondary_chan_off = ie[3] & 0x3;
2573 e->ht_chan_info.chan_width = (ie[4] & 0x4)>>2;
2574 }
2575 break;
2576 case 192: /* VHT operation */
2577 if (ie[1] >= 3) {
2578 e->vht_chan_info.chan_width = ie[2];
2579 e->vht_chan_info.center_chan_1 = ie[3];
2580 e->vht_chan_info.center_chan_2 = ie[4];
2581 }
2582 break;
2583 }
2584
2585 ielen -= ie[1] + 2;
2586 ie += ie[1] + 2;
2587 }
2588 }
2589
2590 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
2591 {
2592 int8_t rssi;
2593 uint16_t caps;
2594
2595 struct nl80211_scanlist *sl = arg;
2596 struct nlattr **tb = nl80211_parse(msg);
2597 struct nlattr *bss[NL80211_BSS_MAX + 1];
2598
2599 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2600 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2601 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2602 [NL80211_BSS_BSSID] = { 0 },
2603 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2604 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2605 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
2606 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2607 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2608 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2609 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2610 [NL80211_BSS_BEACON_IES] = { 0 },
2611 };
2612
2613 if (!tb[NL80211_ATTR_BSS] ||
2614 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2615 bss_policy) ||
2616 !bss[NL80211_BSS_BSSID])
2617 {
2618 return NL_SKIP;
2619 }
2620
2621 if (bss[NL80211_BSS_CAPABILITY])
2622 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2623 else
2624 caps = 0;
2625
2626 memset(sl->e, 0, sizeof(*sl->e));
2627 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
2628
2629 if (caps & (1<<1))
2630 sl->e->mode = IWINFO_OPMODE_ADHOC;
2631 else if (caps & (1<<0))
2632 sl->e->mode = IWINFO_OPMODE_MASTER;
2633 else
2634 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
2635
2636 if (caps & (1<<4))
2637 sl->e->crypto.enabled = 1;
2638
2639 if (bss[NL80211_BSS_FREQUENCY])
2640 {
2641 sl->e->mhz = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
2642 sl->e->band = nl80211_freq2band(sl->e->mhz);
2643 sl->e->channel = nl80211_freq2channel(sl->e->mhz);
2644 }
2645
2646 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
2647 nl80211_get_scanlist_ie(bss, sl->e);
2648
2649 if (bss[NL80211_BSS_SIGNAL_MBM])
2650 {
2651 sl->e->signal =
2652 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
2653
2654 rssi = sl->e->signal - 0x100;
2655
2656 if (rssi < -110)
2657 rssi = -110;
2658 else if (rssi > -40)
2659 rssi = -40;
2660
2661 sl->e->quality = (rssi + 110);
2662 sl->e->quality_max = 70;
2663 }
2664
2665 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
2666 {
2667 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2668 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2669 }
2670
2671 sl->e++;
2672 sl->len++;
2673
2674 return NL_SKIP;
2675 }
2676
2677 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
2678 {
2679 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
2680
2681 if (nl80211_request(ifname, NL80211_CMD_TRIGGER_SCAN, 0, NULL, NULL))
2682 goto out;
2683
2684 if (nl80211_wait("nl80211", "scan",
2685 NL80211_CMD_NEW_SCAN_RESULTS, NL80211_CMD_SCAN_ABORTED))
2686 goto out;
2687
2688 if (nl80211_request(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
2689 nl80211_get_scanlist_cb, &sl))
2690 goto out;
2691
2692 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
2693 return 0;
2694
2695 out:
2696 *len = 0;
2697 return -1;
2698 }
2699
2700 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
2701 {
2702 #define hex(x) \
2703 (((x) >= 'a') ? ((x) - 'a' + 10) : \
2704 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0')))
2705
2706 int len = 0;
2707
2708 while (*in)
2709 {
2710 if (len + 1 >= outlen)
2711 break;
2712
2713 switch (*in)
2714 {
2715 case '\\':
2716 in++;
2717 switch (*in)
2718 {
2719 case 'n':
2720 out[len++] = '\n'; in++;
2721 break;
2722
2723 case 'r':
2724 out[len++] = '\r'; in++;
2725 break;
2726
2727 case 't':
2728 out[len++] = '\t'; in++;
2729 break;
2730
2731 case 'e':
2732 out[len++] = '\033'; in++;
2733 break;
2734
2735 case 'x':
2736 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
2737 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
2738 in += 3;
2739 break;
2740
2741 default:
2742 out[len++] = *in++;
2743 break;
2744 }
2745 break;
2746
2747 default:
2748 out[len++] = *in++;
2749 break;
2750 }
2751 }
2752
2753 if (outlen > len)
2754 out[len] = '\0';
2755
2756 return len;
2757 }
2758
2759 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len)
2760 {
2761 int sock, qmax, rssi, tries, count = -1, ready = 0;
2762 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096];
2763 struct sockaddr_un local = { 0 };
2764 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
2765
2766 sock = nl80211_wpactl_connect(ifname, &local);
2767
2768 if (sock < 0)
2769 return sock;
2770
2771 send(sock, "ATTACH", 6, 0);
2772 send(sock, "SCAN", 4, 0);
2773
2774 /*
2775 * wait for scan results:
2776 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan
2777 * 72 channels at most. We'll also receive two "OK" messages acknowledging
2778 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra
2779 * time to process the results, so try 72 + 2 + 1 times.
2780 */
2781 for (tries = 0; tries < 75; tries++)
2782 {
2783 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0)
2784 continue;
2785
2786 /* got an event notification */
2787 if (reply[0] == '<')
2788 {
2789 /* scan results are ready */
2790 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS"))
2791 {
2792 /* send "SCAN_RESULTS" command */
2793 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12);
2794 break;
2795 }
2796
2797 /* is another unrelated event, retry */
2798 tries--;
2799 }
2800
2801 /* scanning already in progress, keep awaiting results */
2802 else if (!strcmp(reply, "FAIL-BUSY\n"))
2803 {
2804 tries--;
2805 }
2806
2807 /* another failure, abort */
2808 else if (!strncmp(reply, "FAIL-", 5))
2809 {
2810 break;
2811 }
2812 }
2813
2814 /* receive and parse scan results if the wait above didn't time out */
2815 while (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
2816 {
2817 /* received an event notification, receive again */
2818 if (reply[0] == '<')
2819 continue;
2820
2821 nl80211_get_quality_max(ifname, &qmax);
2822
2823 for (line = strtok_r(reply, "\n", &pos);
2824 line != NULL;
2825 line = strtok_r(NULL, "\n", &pos))
2826 {
2827 /* skip header line */
2828 if (count < 0)
2829 {
2830 count++;
2831 continue;
2832 }
2833
2834 bssid = strtok(line, "\t");
2835 freq = strtok(NULL, "\t");
2836 signal = strtok(NULL, "\t");
2837 flags = strtok(NULL, "\t");
2838 ssid = strtok(NULL, "\n");
2839
2840 if (!bssid || !freq || !signal || !flags)
2841 continue;
2842
2843 /* BSSID */
2844 e->mac[0] = strtol(&bssid[0], NULL, 16);
2845 e->mac[1] = strtol(&bssid[3], NULL, 16);
2846 e->mac[2] = strtol(&bssid[6], NULL, 16);
2847 e->mac[3] = strtol(&bssid[9], NULL, 16);
2848 e->mac[4] = strtol(&bssid[12], NULL, 16);
2849 e->mac[5] = strtol(&bssid[15], NULL, 16);
2850
2851 /* SSID */
2852 if (ssid)
2853 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2854 else
2855 e->ssid[0] = 0;
2856
2857 /* Mode */
2858 if (strstr(flags, "[MESH]"))
2859 e->mode = IWINFO_OPMODE_MESHPOINT;
2860 else if (strstr(flags, "[IBSS]"))
2861 e->mode = IWINFO_OPMODE_ADHOC;
2862 else
2863 e->mode = IWINFO_OPMODE_MASTER;
2864
2865 /* Channel */
2866 e->mhz = atoi(freq);
2867 e->band = nl80211_freq2band(e->mhz);
2868 e->channel = nl80211_freq2channel(e->mhz);
2869
2870 /* Signal */
2871 rssi = atoi(signal);
2872 e->signal = rssi;
2873
2874 /* Quality */
2875 if (rssi < 0)
2876 {
2877 /* The cfg80211 wext compat layer assumes a signal range
2878 * of -110 dBm to -40 dBm, the quality value is derived
2879 * by adding 110 to the signal level */
2880 if (rssi < -110)
2881 rssi = -110;
2882 else if (rssi > -40)
2883 rssi = -40;
2884
2885 e->quality = (rssi + 110);
2886 }
2887 else
2888 {
2889 e->quality = rssi;
2890 }
2891
2892 /* Max. Quality */
2893 e->quality_max = qmax;
2894
2895 /* Crypto */
2896 nl80211_get_scancrypto(flags, &e->crypto);
2897
2898 count++;
2899 e++;
2900 }
2901
2902 *len = count * sizeof(struct iwinfo_scanlist_entry);
2903 break;
2904 }
2905
2906 close(sock);
2907 unlink(local.sun_path);
2908
2909 return (count >= 0) ? 0 : -1;
2910 }
2911
2912 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
2913 {
2914 char *res;
2915 int rv, mode;
2916
2917 *len = 0;
2918
2919 /* Got a radioX pseudo interface, find some interface on it or create one */
2920 if (!strncmp(ifname, "radio", 5))
2921 {
2922 /* Reuse existing interface */
2923 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2924 {
2925 return nl80211_get_scanlist(res, buf, len);
2926 }
2927
2928 /* Need to spawn a temporary iface for scanning */
2929 else if ((res = nl80211_ifadd(ifname)) != NULL)
2930 {
2931 rv = nl80211_get_scanlist(res, buf, len);
2932 nl80211_ifdel(res);
2933 return rv;
2934 }
2935 }
2936
2937 /* WPA supplicant */
2938 if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
2939 {
2940 return 0;
2941 }
2942
2943 /* station / ad-hoc / monitor scan */
2944 else if (!nl80211_get_mode(ifname, &mode) &&
2945 (mode == IWINFO_OPMODE_ADHOC ||
2946 mode == IWINFO_OPMODE_MASTER ||
2947 mode == IWINFO_OPMODE_CLIENT ||
2948 mode == IWINFO_OPMODE_MONITOR) &&
2949 iwinfo_ifup(ifname))
2950 {
2951 return nl80211_get_scanlist_nl(ifname, buf, len);
2952 }
2953
2954 /* AP scan */
2955 else
2956 {
2957 /* Got a temp interface, don't create yet another one */
2958 if (!strncmp(ifname, "tmp.", 4))
2959 {
2960 if (!iwinfo_ifup(ifname))
2961 return -1;
2962
2963 rv = nl80211_get_scanlist_nl(ifname, buf, len);
2964 iwinfo_ifdown(ifname);
2965 return rv;
2966 }
2967
2968 /* Spawn a new scan interface */
2969 else
2970 {
2971 if (!(res = nl80211_ifadd(ifname)))
2972 return -1;
2973
2974 iwinfo_ifmac(res);
2975
2976 /* if we can take the new interface up, the driver supports an
2977 * additional interface and there's no need to tear down the ap */
2978 if (iwinfo_ifup(res))
2979 {
2980 rv = nl80211_get_scanlist_nl(res, buf, len);
2981 iwinfo_ifdown(res);
2982 }
2983
2984 /* driver cannot create secondary interface, take down ap
2985 * during scan */
2986 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2987 {
2988 rv = nl80211_get_scanlist_nl(res, buf, len);
2989 iwinfo_ifdown(res);
2990 iwinfo_ifup(ifname);
2991 nl80211_hostapd_hup(ifname);
2992 }
2993 else
2994 rv = -1;
2995
2996 nl80211_ifdel(res);
2997 return rv;
2998 }
2999 }
3000
3001 return -1;
3002 }
3003
3004 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
3005 {
3006 int bands_remain, freqs_remain;
3007
3008 struct nl80211_array_buf *arr = arg;
3009 struct iwinfo_freqlist_entry *e;
3010
3011 struct nlattr **attr = nl80211_parse(msg);
3012 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
3013 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
3014 struct nlattr *band, *freq;
3015
3016 e = arr->buf;
3017 e += arr->count;
3018
3019 if (attr[NL80211_ATTR_WIPHY_BANDS]) {
3020 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
3021 {
3022 nla_parse(bands, NL80211_BAND_ATTR_MAX,
3023 nla_data(band), nla_len(band), NULL);
3024
3025 if (bands[NL80211_BAND_ATTR_FREQS]) {
3026 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
3027 {
3028 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
3029 nla_data(freq), nla_len(freq), NULL);
3030
3031 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
3032 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
3033 continue;
3034
3035 e->band = nl80211_get_band(band->nla_type);
3036 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
3037 e->channel = nl80211_freq2channel(e->mhz);
3038
3039 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_MINUS])
3040 e->flags |= IWINFO_FREQ_NO_HT40MINUS;
3041 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_PLUS])
3042 e->flags |= IWINFO_FREQ_NO_HT40PLUS;
3043 if (freqs[NL80211_FREQUENCY_ATTR_NO_80MHZ])
3044 e->flags |= IWINFO_FREQ_NO_80MHZ;
3045 if (freqs[NL80211_FREQUENCY_ATTR_NO_160MHZ])
3046 e->flags |= IWINFO_FREQ_NO_160MHZ;
3047 if (freqs[NL80211_FREQUENCY_ATTR_NO_20MHZ])
3048 e->flags |= IWINFO_FREQ_NO_20MHZ;
3049 if (freqs[NL80211_FREQUENCY_ATTR_NO_10MHZ])
3050 e->flags |= IWINFO_FREQ_NO_10MHZ;
3051 if (freqs[NL80211_FREQUENCY_ATTR_NO_HE])
3052 e->flags |= IWINFO_FREQ_NO_HE;
3053 if (freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
3054 !freqs[NL80211_FREQUENCY_ATTR_RADAR])
3055 e->flags |= IWINFO_FREQ_NO_IR;
3056 if (freqs[NL80211_FREQUENCY_ATTR_INDOOR_ONLY])
3057 e->flags |= IWINFO_FREQ_INDOOR_ONLY;
3058
3059 /* keep backwards compatibility */
3060 e->restricted = (e->flags & IWINFO_FREQ_NO_IR) ? 1 : 0;
3061
3062 e++;
3063 arr->count++;
3064 }
3065 }
3066 }
3067 }
3068
3069 return NL_SKIP;
3070 }
3071
3072 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
3073 {
3074 struct nl80211_msg_conveyor *cv;
3075 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
3076 uint32_t features = nl80211_get_protocol_features(ifname);
3077 int flags;
3078
3079 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
3080 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
3081 if (!cv)
3082 goto out;
3083
3084 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
3085 if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr))
3086 goto out;
3087
3088 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
3089 return 0;
3090
3091 nla_put_failure:
3092 nl80211_free(cv);
3093 out:
3094 *len = 0;
3095 return -1;
3096 }
3097
3098 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
3099 {
3100 char *buf = arg;
3101 struct nlattr **attr = nl80211_parse(msg);
3102
3103 if (attr[NL80211_ATTR_REG_ALPHA2])
3104 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
3105 else
3106 buf[0] = 0;
3107
3108 return NL_SKIP;
3109 }
3110
3111 static int nl80211_get_country(const char *ifname, char *buf)
3112 {
3113 if (nl80211_request(ifname, NL80211_CMD_GET_REG, 0,
3114 nl80211_get_country_cb, buf))
3115 return -1;
3116
3117 return 0;
3118 }
3119
3120 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
3121 {
3122 int count;
3123 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
3124 const struct iwinfo_iso3166_label *l;
3125
3126 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
3127 {
3128 e->iso3166 = l->iso3166;
3129 e->ccode[0] = (l->iso3166 / 256);
3130 e->ccode[1] = (l->iso3166 % 256);
3131 e->ccode[2] = 0;
3132 }
3133
3134 *len = (count * sizeof(struct iwinfo_country_entry));
3135 return 0;
3136 }
3137
3138
3139 struct nl80211_modes
3140 {
3141 bool ok;
3142 uint32_t hw;
3143 uint32_t ht;
3144
3145 uint8_t bands;
3146
3147 uint16_t nl_ht;
3148 uint32_t nl_vht;
3149 uint16_t he_phy_cap[6];
3150 };
3151
3152 static void nl80211_eval_modelist(struct nl80211_modes *m)
3153 {
3154 /* Treat any nonzero capability as 11n */
3155 if (m->nl_ht > 0)
3156 {
3157 m->hw |= IWINFO_80211_N;
3158 m->ht |= IWINFO_HTMODE_HT20;
3159
3160 if (m->nl_ht & (1 << 1))
3161 m->ht |= IWINFO_HTMODE_HT40;
3162 }
3163
3164 if (m->he_phy_cap[0] != 0) {
3165 m->hw |= IWINFO_80211_AX;
3166 m->ht |= IWINFO_HTMODE_HE20;
3167
3168 if (m->he_phy_cap[0] & BIT(9))
3169 m->ht |= IWINFO_HTMODE_HE40;
3170 if (m->he_phy_cap[0] & BIT(10))
3171 m->ht |= IWINFO_HTMODE_HE40 | IWINFO_HTMODE_HE80;
3172 if (m->he_phy_cap[0] & BIT(11))
3173 m->ht |= IWINFO_HTMODE_HE160;
3174 if (m->he_phy_cap[0] & BIT(12))
3175 m->ht |= IWINFO_HTMODE_HE160 | IWINFO_HTMODE_HE80_80;
3176 }
3177
3178 if (m->bands & IWINFO_BAND_24)
3179 {
3180 m->hw |= IWINFO_80211_B;
3181 m->hw |= IWINFO_80211_G;
3182 }
3183
3184 if (m->bands & IWINFO_BAND_5)
3185 {
3186 /* Treat any nonzero capability as 11ac */
3187 if (m->nl_vht > 0)
3188 {
3189 m->hw |= IWINFO_80211_AC;
3190 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
3191
3192 switch ((m->nl_vht >> 2) & 3)
3193 {
3194 case 2:
3195 m->ht |= IWINFO_HTMODE_VHT80_80;
3196 /* fall through */
3197
3198 case 1:
3199 m->ht |= IWINFO_HTMODE_VHT160;
3200 }
3201 }
3202 else
3203 {
3204 m->hw |= IWINFO_80211_A;
3205 }
3206 }
3207
3208 if (m->bands & IWINFO_BAND_60)
3209 {
3210 m->hw |= IWINFO_80211_AD;
3211 }
3212
3213 }
3214
3215 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
3216 {
3217 struct nl80211_modes *m = arg;
3218 int bands_remain;
3219 struct nlattr **attr = nl80211_parse(msg);
3220 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
3221 struct nlattr *band;
3222
3223 if (attr[NL80211_ATTR_WIPHY_BANDS])
3224 {
3225 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
3226 {
3227 m->bands |= nl80211_get_band(band->nla_type);
3228
3229 nla_parse(bands, NL80211_BAND_ATTR_MAX,
3230 nla_data(band), nla_len(band), NULL);
3231
3232 if (bands[NL80211_BAND_ATTR_HT_CAPA])
3233 m->nl_ht = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
3234
3235 if (bands[NL80211_BAND_ATTR_VHT_CAPA])
3236 m->nl_vht = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
3237
3238 if (bands[NL80211_BAND_ATTR_IFTYPE_DATA]) {
3239 struct nlattr *tb[NL80211_BAND_IFTYPE_ATTR_MAX + 1];
3240 struct nlattr *nl_iftype;
3241 int rem_band;
3242 int len;
3243
3244 nla_for_each_nested(nl_iftype, bands[NL80211_BAND_ATTR_IFTYPE_DATA], rem_band) {
3245 nla_parse(tb, NL80211_BAND_IFTYPE_ATTR_MAX,
3246 nla_data(nl_iftype), nla_len(nl_iftype), NULL);
3247 if (tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]) {
3248 len = nla_len(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]);
3249
3250 if (len > sizeof(m->he_phy_cap) - 1)
3251 len = sizeof(m->he_phy_cap) - 1;
3252 memcpy(&((__u8 *)m->he_phy_cap)[1],
3253 nla_data(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]),
3254 len);
3255 }
3256 }
3257 }
3258 }
3259
3260 m->ok = 1;
3261 }
3262
3263 return NL_SKIP;
3264 }
3265
3266 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
3267 {
3268 struct nl80211_msg_conveyor *cv;
3269 struct nl80211_modes m = {};
3270 uint32_t features = nl80211_get_protocol_features(ifname);
3271 int flags;
3272
3273 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
3274 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
3275 if (!cv)
3276 goto out;
3277
3278 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
3279 if (nl80211_send(cv, nl80211_get_modelist_cb, &m))
3280 goto nla_put_failure;
3281
3282 nl80211_eval_modelist(&m);
3283
3284 *buf = m.hw;
3285
3286 return 0;
3287
3288 nla_put_failure:
3289 nl80211_free(cv);
3290 out:
3291 return -1;
3292 }
3293
3294 struct chan_info {
3295 int width;
3296 int mode;
3297 };
3298
3299 static int nl80211_get_htmode_cb(struct nl_msg *msg, void *arg)
3300 {
3301 struct nlattr **tb = nl80211_parse(msg);
3302 struct nlattr *cur;
3303 struct chan_info *chn = arg;
3304
3305 if ((cur = tb[NL80211_ATTR_CHANNEL_WIDTH]))
3306 chn->width = nla_get_u32(cur);
3307
3308 if ((cur = tb[NL80211_ATTR_BSS_HT_OPMODE]))
3309 chn->mode = nla_get_u32(cur);
3310
3311 return NL_SKIP;
3312 }
3313
3314 static int nl80211_get_htmode(const char *ifname, int *buf)
3315 {
3316 struct chan_info chn = { 0 };
3317 char *res, b[2] = { 0 };
3318 int err;
3319 bool he = false;
3320
3321 res = nl80211_phy2ifname(ifname);
3322 *buf = 0;
3323
3324 err = nl80211_request(res ? res : ifname,
3325 NL80211_CMD_GET_INTERFACE, 0,
3326 nl80211_get_htmode_cb, &chn);
3327 if (err)
3328 return -1;
3329
3330 if (nl80211_hostapd_query(res ? res : ifname, "ieee80211ax", b, sizeof(b)))
3331 he = b[0] == '1';
3332 else if (nl80211_wpactl_query(res ? res : ifname, "wifi_generation", b, sizeof(b)))
3333 he = b[0] == '6';
3334
3335 switch (chn.width) {
3336 case NL80211_CHAN_WIDTH_20:
3337 if (he)
3338 *buf = IWINFO_HTMODE_HE20;
3339 else if (chn.mode == -1)
3340 *buf = IWINFO_HTMODE_VHT20;
3341 else
3342 *buf = IWINFO_HTMODE_HT20;
3343 break;
3344 case NL80211_CHAN_WIDTH_40:
3345 if (he)
3346 *buf = IWINFO_HTMODE_HE40;
3347 else if (chn.mode == -1)
3348 *buf = IWINFO_HTMODE_VHT40;
3349 else
3350 *buf = IWINFO_HTMODE_HT40;
3351 break;
3352 case NL80211_CHAN_WIDTH_80:
3353 if (he)
3354 *buf = IWINFO_HTMODE_HE80;
3355 else
3356 *buf = IWINFO_HTMODE_VHT80;
3357 break;
3358 case NL80211_CHAN_WIDTH_80P80:
3359 if (he)
3360 *buf = IWINFO_HTMODE_HE80_80;
3361 else
3362 *buf = IWINFO_HTMODE_VHT80_80;
3363 break;
3364 case NL80211_CHAN_WIDTH_160:
3365 if (he)
3366 *buf = IWINFO_HTMODE_HE160;
3367 else
3368 *buf = IWINFO_HTMODE_VHT160;
3369 break;
3370 case NL80211_CHAN_WIDTH_5:
3371 case NL80211_CHAN_WIDTH_10:
3372 case NL80211_CHAN_WIDTH_20_NOHT:
3373 *buf = IWINFO_HTMODE_NOHT;
3374 break;
3375 default:
3376 return -1;
3377 }
3378
3379 return 0;
3380 }
3381
3382 static int nl80211_get_htmodelist(const char *ifname, int *buf)
3383 {
3384 struct nl80211_msg_conveyor *cv;
3385 struct nl80211_modes m = {};
3386 uint32_t features = nl80211_get_protocol_features(ifname);
3387 int flags;
3388
3389 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
3390 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
3391 if (!cv)
3392 goto out;
3393
3394 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
3395 if (nl80211_send(cv, nl80211_get_modelist_cb, &m))
3396 goto nla_put_failure;
3397
3398 nl80211_eval_modelist(&m);
3399
3400 *buf = m.ht;
3401
3402 return 0;
3403
3404 nla_put_failure:
3405 nl80211_free(cv);
3406 out:
3407 return -1;
3408 }
3409
3410
3411 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
3412 {
3413 struct nlattr **attr = nl80211_parse(msg);
3414 struct nlattr *comb;
3415 int *ret = arg;
3416 int comb_rem, limit_rem, mode_rem;
3417
3418 *ret = 0;
3419 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
3420 return NL_SKIP;
3421
3422 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
3423 {
3424 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
3425 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
3426 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
3427 };
3428 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1];
3429 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
3430 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
3431 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
3432 };
3433 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1];
3434 struct nlattr *limit;
3435
3436 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy);
3437
3438 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
3439 continue;
3440
3441 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
3442 {
3443 struct nlattr *mode;
3444
3445 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
3446
3447 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
3448 !tb_limit[NL80211_IFACE_LIMIT_MAX])
3449 continue;
3450
3451 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
3452 continue;
3453
3454 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
3455 if (nla_type(mode) == NL80211_IFTYPE_AP)
3456 *ret = 1;
3457 }
3458 }
3459 }
3460
3461 return NL_SKIP;
3462 }
3463
3464 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
3465 {
3466 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
3467 nl80211_get_ifcomb_cb, buf))
3468 return -1;
3469
3470 return 0;
3471 }
3472
3473 static int nl80211_hardware_id_from_fdt(struct iwinfo_hardware_id *id, const char *ifname)
3474 {
3475 char *phy, path[PATH_MAX];
3476
3477 /* Try to determine the phy name from the given interface */
3478 phy = nl80211_ifname2phy(ifname);
3479
3480 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/of_node/compatible",
3481 phy ? "ieee80211" : "net", phy ? phy : ifname);
3482
3483 if (nl80211_readstr(path, id->compatible, sizeof(id->compatible)) <= 0)
3484 return -1;
3485
3486 return 0;
3487 }
3488
3489
3490 static int nl80211_get_hardware_id(const char *ifname, char *buf)
3491 {
3492 struct iwinfo_hardware_id *id = (struct iwinfo_hardware_id *)buf;
3493 char *phy, num[8], path[PATH_MAX];
3494 int i;
3495
3496 struct { const char *path; uint16_t *dest; } lookup[] = {
3497 { "vendor", &id->vendor_id },
3498 { "device", &id->device_id },
3499 { "subsystem_vendor", &id->subsystem_vendor_id },
3500 { "subsystem_device", &id->subsystem_device_id },
3501 { "../idVendor", &id->subsystem_vendor_id },
3502 { "../idProduct", &id->subsystem_device_id }
3503 };
3504
3505 memset(id, 0, sizeof(*id));
3506
3507 /* Try to determine the phy name from the given interface */
3508 phy = nl80211_ifname2phy(ifname);
3509
3510 for (i = 0; i < ARRAY_SIZE(lookup); i++)
3511 {
3512 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/%s",
3513 phy ? "ieee80211" : "net",
3514 phy ? phy : ifname, lookup[i].path);
3515
3516 if (nl80211_readstr(path, num, sizeof(num)) > 0)
3517 *lookup[i].dest = strtoul(num, NULL, 16);
3518 }
3519
3520 /* Failed to obtain hardware PCI/USB IDs... */
3521 if (id->vendor_id == 0 && id->device_id == 0 &&
3522 id->subsystem_vendor_id == 0 && id->subsystem_device_id == 0)
3523 /* ... first fallback to FDT ... */
3524 if (nl80211_hardware_id_from_fdt(id, ifname) == -1)
3525 /* ... then board config */
3526 return iwinfo_hardware_id_from_mtd(id);
3527
3528 return 0;
3529 }
3530
3531 static const struct iwinfo_hardware_entry *
3532 nl80211_get_hardware_entry(const char *ifname)
3533 {
3534 struct iwinfo_hardware_id id;
3535
3536 if (nl80211_get_hardware_id(ifname, (char *)&id))
3537 return NULL;
3538
3539 return iwinfo_hardware(&id);
3540 }
3541
3542 static int nl80211_get_hardware_name(const char *ifname, char *buf)
3543 {
3544 const struct iwinfo_hardware_entry *hw;
3545
3546 if (!(hw = nl80211_get_hardware_entry(ifname)))
3547 sprintf(buf, "Generic MAC80211");
3548 else
3549 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
3550
3551 return 0;
3552 }
3553
3554 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
3555 {
3556 const struct iwinfo_hardware_entry *hw;
3557
3558 if (!(hw = nl80211_get_hardware_entry(ifname)))
3559 return -1;
3560
3561 *buf = hw->txpower_offset;
3562 return 0;
3563 }
3564
3565 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
3566 {
3567 const struct iwinfo_hardware_entry *hw;
3568
3569 if (!(hw = nl80211_get_hardware_entry(ifname)))
3570 return -1;
3571
3572 *buf = hw->frequency_offset;
3573 return 0;
3574 }
3575
3576 static int nl80211_lookup_phyname(const char *section, char *buf)
3577 {
3578 const char *name;
3579 int idx;
3580
3581 if (!strncmp(section, "path=", 5))
3582 idx = nl80211_phy_idx_from_path(section + 5);
3583 else if (!strncmp(section, "macaddr=", 8))
3584 idx = nl80211_phy_idx_from_macaddr(section + 8);
3585 else
3586 idx = nl80211_phy_idx_from_uci(section);
3587
3588 if (idx < 0)
3589 return -1;
3590
3591 name = nl80211_phyidx2name(idx);
3592 if (!name)
3593 return -1;
3594
3595 strcpy(buf, name);
3596 return 0;
3597 }
3598
3599 static int nl80211_phy_path(const char *phyname, const char **path)
3600 {
3601 if (strchr(phyname, '/'))
3602 return -1;
3603
3604 *path = nl80211_phy_path_str(phyname);
3605 if (!*path)
3606 return -1;
3607
3608 return 0;
3609 }
3610
3611 const struct iwinfo_ops nl80211_ops = {
3612 .name = "nl80211",
3613 .probe = nl80211_probe,
3614 .channel = nl80211_get_channel,
3615 .center_chan1 = nl80211_get_center_chan1,
3616 .center_chan2 = nl80211_get_center_chan2,
3617 .frequency = nl80211_get_frequency,
3618 .frequency_offset = nl80211_get_frequency_offset,
3619 .txpower = nl80211_get_txpower,
3620 .txpower_offset = nl80211_get_txpower_offset,
3621 .bitrate = nl80211_get_bitrate,
3622 .signal = nl80211_get_signal,
3623 .noise = nl80211_get_noise,
3624 .quality = nl80211_get_quality,
3625 .quality_max = nl80211_get_quality_max,
3626 .mbssid_support = nl80211_get_mbssid_support,
3627 .hwmodelist = nl80211_get_hwmodelist,
3628 .htmodelist = nl80211_get_htmodelist,
3629 .htmode = nl80211_get_htmode,
3630 .mode = nl80211_get_mode,
3631 .ssid = nl80211_get_ssid,
3632 .bssid = nl80211_get_bssid,
3633 .country = nl80211_get_country,
3634 .hardware_id = nl80211_get_hardware_id,
3635 .hardware_name = nl80211_get_hardware_name,
3636 .encryption = nl80211_get_encryption,
3637 .phyname = nl80211_get_phyname,
3638 .assoclist = nl80211_get_assoclist,
3639 .txpwrlist = nl80211_get_txpwrlist,
3640 .scanlist = nl80211_get_scanlist,
3641 .freqlist = nl80211_get_freqlist,
3642 .countrylist = nl80211_get_countrylist,
3643 .survey = nl80211_get_survey,
3644 .lookup_phy = nl80211_lookup_phyname,
3645 .phy_path = nl80211_phy_path,
3646 .close = nl80211_close
3647 };
Library for accessing wireless device drivers