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devices: add device id for Qualcomm Atheros QCN6122
[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 const 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 const 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 const 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_BYTES64] = { .type = NLA_U64 },
1558 [NL80211_STA_INFO_TX_BYTES64] = { .type = NLA_U64 },
1559 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1560 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1561 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1562 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1563 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1564 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1565 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1566 };
1567
1568 static const struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1569 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1570 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1571 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1572 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1573 };
1574
1575 if (attr[NL80211_ATTR_STA_INFO])
1576 {
1577 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1578 attr[NL80211_ATTR_STA_INFO], stats_policy))
1579 {
1580 if (sinfo[NL80211_STA_INFO_SIGNAL])
1581 {
1582 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1583 rr->rssi = (rr->rssi * rr->rssi_samples + dbm) / (rr->rssi_samples + 1);
1584 rr->rssi_samples++;
1585 }
1586
1587 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1588 {
1589 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1590 sinfo[NL80211_STA_INFO_TX_BITRATE],
1591 rate_policy))
1592 {
1593 if (rinfo[NL80211_RATE_INFO_BITRATE])
1594 {
1595 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1596 rr->rate = (rr->rate * rr->rate_samples + mbit) / (rr->rate_samples + 1);
1597 rr->rate_samples++;
1598 }
1599 }
1600 }
1601 }
1602 }
1603
1604 return NL_SKIP;
1605 }
1606
1607 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1608 {
1609 DIR *d;
1610 struct dirent *de;
1611
1612 memset(r, 0, sizeof(*r));
1613
1614 if ((d = opendir("/sys/class/net")) != NULL)
1615 {
1616 while ((de = readdir(d)) != NULL)
1617 {
1618 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1619 (!de->d_name[strlen(ifname)] ||
1620 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1621 {
1622 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
1623 NLM_F_DUMP, nl80211_fill_signal_cb, r);
1624 }
1625 }
1626
1627 closedir(d);
1628 }
1629 }
1630
1631 static int nl80211_get_bitrate(const char *ifname, int *buf)
1632 {
1633 struct nl80211_rssi_rate rr;
1634
1635 nl80211_fill_signal(ifname, &rr);
1636
1637 if (rr.rate_samples)
1638 {
1639 *buf = (rr.rate * 100);
1640 return 0;
1641 }
1642
1643 return -1;
1644 }
1645
1646 static int nl80211_get_signal(const char *ifname, int *buf)
1647 {
1648 struct nl80211_rssi_rate rr;
1649
1650 nl80211_fill_signal(ifname, &rr);
1651
1652 if (rr.rssi_samples)
1653 {
1654 *buf = rr.rssi;
1655 return 0;
1656 }
1657
1658 return -1;
1659 }
1660
1661 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1662 {
1663 int8_t *noise = arg;
1664 struct nlattr **tb = nl80211_parse(msg);
1665 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1666
1667 static const struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1668 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1669 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1670 };
1671
1672 if (!tb[NL80211_ATTR_SURVEY_INFO])
1673 return NL_SKIP;
1674
1675 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1676 tb[NL80211_ATTR_SURVEY_INFO], sp))
1677 return NL_SKIP;
1678
1679 if (!si[NL80211_SURVEY_INFO_NOISE])
1680 return NL_SKIP;
1681
1682 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1683 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1684
1685 return NL_SKIP;
1686 }
1687
1688
1689 static int nl80211_get_noise(const char *ifname, int *buf)
1690 {
1691 int8_t noise = 0;
1692
1693 if (nl80211_request(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP,
1694 nl80211_get_noise_cb, &noise))
1695 goto out;
1696
1697 *buf = noise;
1698 return 0;
1699
1700 out:
1701 *buf = 0;
1702 return -1;
1703 }
1704
1705 static int nl80211_get_quality(const char *ifname, int *buf)
1706 {
1707 int signal;
1708
1709 if (!nl80211_get_signal(ifname, &signal))
1710 {
1711 /* A positive signal level is usually just a quality
1712 * value, pass through as-is */
1713 if (signal >= 0)
1714 {
1715 *buf = signal;
1716 }
1717
1718 /* The cfg80211 wext compat layer assumes a signal range
1719 * of -110 dBm to -40 dBm, the quality value is derived
1720 * by adding 110 to the signal level */
1721 else
1722 {
1723 if (signal < -110)
1724 signal = -110;
1725 else if (signal > -40)
1726 signal = -40;
1727
1728 *buf = (signal + 110);
1729 }
1730
1731 return 0;
1732 }
1733
1734 return -1;
1735 }
1736
1737 static int nl80211_get_quality_max(const char *ifname, int *buf)
1738 {
1739 /* The cfg80211 wext compat layer assumes a maximum
1740 * quality of 70 */
1741 *buf = 70;
1742
1743 return 0;
1744 }
1745
1746 static int nl80211_check_wepkey(const char *key)
1747 {
1748 if (key && *key)
1749 {
1750 switch (strlen(key))
1751 {
1752 case 5:
1753 case 10:
1754 return IWINFO_CIPHER_WEP40;
1755
1756 case 13:
1757 case 26:
1758 return IWINFO_CIPHER_WEP104;
1759 }
1760 }
1761
1762 return 0;
1763 }
1764
1765 static const struct {
1766 const char *match;
1767 int version;
1768 int suite;
1769 } wpa_key_mgmt_strings[] = {
1770 { "IEEE 802.1X/EAP", 0, IWINFO_KMGMT_8021x },
1771 { "EAP-SUITE-B-192", 4, IWINFO_KMGMT_8021x },
1772 { "EAP-SUITE-B", 4, IWINFO_KMGMT_8021x },
1773 { "EAP-SHA384", 4, IWINFO_KMGMT_8021x },
1774 { "EAP-SHA256", 0, IWINFO_KMGMT_8021x },
1775 { "PSK-SHA256", 0, IWINFO_KMGMT_PSK },
1776 { "NONE", 0, IWINFO_KMGMT_NONE },
1777 { "None", 0, IWINFO_KMGMT_NONE },
1778 { "PSK", 0, IWINFO_KMGMT_PSK },
1779 { "EAP", 0, IWINFO_KMGMT_8021x },
1780 { "SAE", 4, IWINFO_KMGMT_SAE },
1781 { "OWE", 4, IWINFO_KMGMT_OWE }
1782 };
1783
1784 static void parse_wpa_suites(const char *str, int defversion,
1785 uint8_t *versions, uint8_t *suites)
1786 {
1787 size_t l;
1788 int i, version;
1789 const char *p, *q, *m, *sep = " \t\n,-+/";
1790
1791 for (p = str; *p; )
1792 {
1793 q = p;
1794
1795 for (i = 0; i < ARRAY_SIZE(wpa_key_mgmt_strings); i++)
1796 {
1797 m = wpa_key_mgmt_strings[i].match;
1798 l = strlen(m);
1799
1800 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l])))
1801 {
1802 if (wpa_key_mgmt_strings[i].version != 0)
1803 version = wpa_key_mgmt_strings[i].version;
1804 else
1805 version = defversion;
1806
1807 *versions |= version;
1808 *suites |= wpa_key_mgmt_strings[i].suite;
1809
1810 q += l;
1811 break;
1812 }
1813 }
1814
1815 if (q == p)
1816 q += strcspn(q, sep);
1817
1818 p = q + strspn(q, sep);
1819 }
1820 }
1821
1822 static const struct {
1823 const char *match;
1824 int cipher;
1825 } wpa_cipher_strings[] = {
1826 { "WEP-104", IWINFO_CIPHER_WEP104 },
1827 { "WEP-40", IWINFO_CIPHER_WEP40 },
1828 { "NONE", IWINFO_CIPHER_NONE },
1829 { "TKIP", IWINFO_CIPHER_TKIP },
1830 { "CCMP-256",IWINFO_CIPHER_CCMP256 },
1831 { "CCMP", IWINFO_CIPHER_CCMP },
1832 { "GCMP-256",IWINFO_CIPHER_GCMP256 },
1833 { "GCMP", IWINFO_CIPHER_GCMP }
1834 };
1835
1836 static void parse_wpa_ciphers(const char *str, uint16_t *ciphers)
1837 {
1838 int i;
1839 size_t l;
1840 const char *m, *p, *q, *sep = " \t\n,-+/";
1841
1842 for (p = str; *p; )
1843 {
1844 q = p;
1845
1846 for (i = 0; i < ARRAY_SIZE(wpa_cipher_strings); i++)
1847 {
1848 m = wpa_cipher_strings[i].match;
1849 l = strlen(m);
1850
1851 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l])))
1852 {
1853 *ciphers |= wpa_cipher_strings[i].cipher;
1854
1855 q += l;
1856 break;
1857 }
1858 }
1859
1860 if (q == p)
1861 q += strcspn(q, sep);
1862
1863 p = q + strspn(q, sep);
1864 }
1865 }
1866
1867 static int nl80211_get_encryption(const char *ifname, char *buf)
1868 {
1869 char *p;
1870 int opmode;
1871 uint8_t wpa_version = 0;
1872 char wpa[2], wpa_key_mgmt[64], wpa_pairwise[16], wpa_groupwise[16];
1873 char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27];
1874 char mode[16];
1875
1876 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1877
1878 /* WPA supplicant */
1879 if (nl80211_wpactl_query(ifname,
1880 "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise),
1881 "group_cipher", wpa_groupwise, sizeof(wpa_groupwise),
1882 "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1883 "mode", mode, sizeof(mode)))
1884 {
1885 /* WEP or Open */
1886 if (!strcmp(wpa_key_mgmt, "NONE"))
1887 {
1888 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1889 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers);
1890
1891 if (c->pair_ciphers != 0 && c->pair_ciphers != IWINFO_CIPHER_NONE) {
1892 c->enabled = 1;
1893 c->auth_suites = IWINFO_KMGMT_NONE;
1894 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1895 }
1896 else {
1897 c->pair_ciphers = 0;
1898 c->group_ciphers = 0;
1899 }
1900 }
1901
1902 /* MESH with SAE */
1903 else if (!strcmp(mode, "mesh") && !strcmp(wpa_key_mgmt, "UNKNOWN"))
1904 {
1905 c->enabled = 1;
1906 c->wpa_version = 4;
1907 c->auth_suites = IWINFO_KMGMT_SAE;
1908 c->pair_ciphers = IWINFO_CIPHER_CCMP;
1909 c->group_ciphers = IWINFO_CIPHER_CCMP;
1910 }
1911
1912 /* WPA */
1913 else
1914 {
1915 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1916 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers);
1917
1918 p = wpa_key_mgmt;
1919
1920 if (!strncmp(p, "WPA2-", 5) || !strncmp(p, "WPA2/", 5))
1921 {
1922 p += 5;
1923 wpa_version = 2;
1924 }
1925 else if (!strncmp(p, "WPA-", 4))
1926 {
1927 p += 4;
1928 wpa_version = 1;
1929 }
1930
1931 parse_wpa_suites(p, wpa_version, &c->wpa_version, &c->auth_suites);
1932
1933 c->enabled = !!(c->wpa_version && c->auth_suites);
1934 }
1935
1936 return 0;
1937 }
1938
1939 /* Hostapd */
1940 else if (nl80211_hostapd_query(ifname,
1941 "wpa", wpa, sizeof(wpa),
1942 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1943 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise),
1944 "auth_algs", auth_algs, sizeof(auth_algs),
1945 "wep_key0", wep_key0, sizeof(wep_key0),
1946 "wep_key1", wep_key1, sizeof(wep_key1),
1947 "wep_key2", wep_key2, sizeof(wep_key2),
1948 "wep_key3", wep_key3, sizeof(wep_key3)))
1949 {
1950 c->wpa_version = 0;
1951
1952 if (wpa_key_mgmt[0])
1953 {
1954 for (p = strtok(wpa_key_mgmt, " \t"); p != NULL; p = strtok(NULL, " \t"))
1955 {
1956 if (!strncmp(p, "WPA-", 4))
1957 p += 4;
1958
1959 if (!strncmp(p, "FT-", 3))
1960 p += 3;
1961
1962 parse_wpa_suites(p, atoi(wpa), &c->wpa_version, &c->auth_suites);
1963 }
1964
1965 c->enabled = c->wpa_version ? 1 : 0;
1966 }
1967
1968 if (wpa_pairwise[0])
1969 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1970
1971 if (auth_algs[0])
1972 {
1973 switch (atoi(auth_algs))
1974 {
1975 case 1:
1976 c->auth_algs |= IWINFO_AUTH_OPEN;
1977 break;
1978
1979 case 2:
1980 c->auth_algs |= IWINFO_AUTH_SHARED;
1981 break;
1982
1983 case 3:
1984 c->auth_algs |= IWINFO_AUTH_OPEN;
1985 c->auth_algs |= IWINFO_AUTH_SHARED;
1986 break;
1987 }
1988
1989 c->pair_ciphers |= nl80211_check_wepkey(wep_key0);
1990 c->pair_ciphers |= nl80211_check_wepkey(wep_key1);
1991 c->pair_ciphers |= nl80211_check_wepkey(wep_key2);
1992 c->pair_ciphers |= nl80211_check_wepkey(wep_key3);
1993
1994 c->enabled = (c->auth_algs && c->pair_ciphers) ? 1 : 0;
1995 }
1996
1997 c->group_ciphers = c->pair_ciphers;
1998
1999 return 0;
2000 }
2001
2002 /* Ad-Hoc or Mesh interfaces without wpa_supplicant are open */
2003 else if (!nl80211_get_mode(ifname, &opmode) &&
2004 (opmode == IWINFO_OPMODE_ADHOC ||
2005 opmode == IWINFO_OPMODE_MESHPOINT))
2006 {
2007 c->enabled = 0;
2008
2009 return 0;
2010 }
2011
2012
2013 return -1;
2014 }
2015
2016 static int nl80211_get_phyname(const char *ifname, char *buf)
2017 {
2018 const char *name;
2019
2020 name = nl80211_ifname2phy(ifname);
2021
2022 if (name)
2023 {
2024 strcpy(buf, name);
2025 return 0;
2026 }
2027 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
2028 {
2029 name = nl80211_ifname2phy(name);
2030
2031 if (name)
2032 {
2033 strcpy(buf, ifname);
2034 return 0;
2035 }
2036 }
2037
2038 return -1;
2039 }
2040
2041
2042 static void nl80211_parse_rateinfo(struct nlattr **ri,
2043 struct iwinfo_rate_entry *re)
2044 {
2045 if (ri[NL80211_RATE_INFO_BITRATE32])
2046 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100;
2047 else if (ri[NL80211_RATE_INFO_BITRATE])
2048 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100;
2049
2050 if (ri[NL80211_RATE_INFO_EHT_MCS])
2051 {
2052 re->is_eht = 1;
2053 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_EHT_MCS]);
2054
2055 if (ri[NL80211_RATE_INFO_EHT_NSS])
2056 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_EHT_NSS]);
2057 if (ri[NL80211_RATE_INFO_EHT_GI])
2058 re->eht_gi = nla_get_u8(ri[NL80211_RATE_INFO_EHT_GI]);
2059 }
2060 else if (ri[NL80211_RATE_INFO_HE_MCS])
2061 {
2062 re->is_he = 1;
2063 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_HE_MCS]);
2064
2065 if (ri[NL80211_RATE_INFO_HE_NSS])
2066 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_HE_NSS]);
2067 if (ri[NL80211_RATE_INFO_HE_GI])
2068 re->he_gi = nla_get_u8(ri[NL80211_RATE_INFO_HE_GI]);
2069 if (ri[NL80211_RATE_INFO_HE_DCM])
2070 re->he_dcm = nla_get_u8(ri[NL80211_RATE_INFO_HE_DCM]);
2071 }
2072 else if (ri[NL80211_RATE_INFO_VHT_MCS])
2073 {
2074 re->is_vht = 1;
2075 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]);
2076
2077 if (ri[NL80211_RATE_INFO_VHT_NSS])
2078 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]);
2079 }
2080 else if (ri[NL80211_RATE_INFO_MCS])
2081 {
2082 re->is_ht = 1;
2083 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]);
2084 }
2085
2086 if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH])
2087 re->mhz = 5;
2088 else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH])
2089 re->mhz = 10;
2090 else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH])
2091 re->mhz = 40;
2092 else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH])
2093 re->mhz = 80;
2094 else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] ||
2095 ri[NL80211_RATE_INFO_160_MHZ_WIDTH])
2096 re->mhz = 160;
2097 else if (ri[NL80211_RATE_INFO_320_MHZ_WIDTH])
2098 re->mhz_hi = 320 / 256, re->mhz = 320 % 256;
2099 else
2100 re->mhz = 20;
2101
2102 if (ri[NL80211_RATE_INFO_SHORT_GI])
2103 re->is_short_gi = 1;
2104
2105 re->is_40mhz = (re->mhz == 40);
2106 }
2107
2108 static int nl80211_get_survey_cb(struct nl_msg *msg, void *arg)
2109 {
2110 struct nl80211_array_buf *arr = arg;
2111 struct iwinfo_survey_entry *e = arr->buf;
2112 struct nlattr **attr = nl80211_parse(msg);
2113 struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
2114 int rc;
2115
2116 static const struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
2117 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
2118 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
2119 [NL80211_SURVEY_INFO_TIME] = { .type = NLA_U64 },
2120 [NL80211_SURVEY_INFO_TIME_BUSY] = { .type = NLA_U64 },
2121 [NL80211_SURVEY_INFO_TIME_EXT_BUSY] = { .type = NLA_U64 },
2122 [NL80211_SURVEY_INFO_TIME_RX] = { .type = NLA_U64 },
2123 [NL80211_SURVEY_INFO_TIME_TX] = { .type = NLA_U64 },
2124 };
2125
2126 rc = nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
2127 attr[NL80211_ATTR_SURVEY_INFO],
2128 survey_policy);
2129 if (rc)
2130 return NL_SKIP;
2131
2132 /* advance to end of array */
2133 e += arr->count;
2134 memset(e, 0, sizeof(*e));
2135
2136 if (sinfo[NL80211_SURVEY_INFO_FREQUENCY])
2137 e->mhz = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]);
2138
2139 if (sinfo[NL80211_SURVEY_INFO_NOISE])
2140 e->noise = nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
2141
2142 if (sinfo[NL80211_SURVEY_INFO_TIME])
2143 e->active_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME]);
2144
2145 if (sinfo[NL80211_SURVEY_INFO_TIME_BUSY])
2146 e->busy_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_BUSY]);
2147
2148 if (sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY])
2149 e->busy_time_ext = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]);
2150
2151 if (sinfo[NL80211_SURVEY_INFO_TIME_RX])
2152 e->rxtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_RX]);
2153
2154 if (sinfo[NL80211_SURVEY_INFO_TIME_TX])
2155 e->txtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_TX]);
2156
2157 arr->count++;
2158 return NL_SKIP;
2159 }
2160
2161
2162 static void plink_state_to_str(char *dst, unsigned state)
2163 {
2164 switch (state) {
2165 case NL80211_PLINK_LISTEN:
2166 strcpy(dst, "LISTEN");
2167 break;
2168 case NL80211_PLINK_OPN_SNT:
2169 strcpy(dst, "OPN_SNT");
2170 break;
2171 case NL80211_PLINK_OPN_RCVD:
2172 strcpy(dst, "OPN_RCVD");
2173 break;
2174 case NL80211_PLINK_CNF_RCVD:
2175 strcpy(dst, "CNF_RCVD");
2176 break;
2177 case NL80211_PLINK_ESTAB:
2178 strcpy(dst, "ESTAB");
2179 break;
2180 case NL80211_PLINK_HOLDING:
2181 strcpy(dst, "HOLDING");
2182 break;
2183 case NL80211_PLINK_BLOCKED:
2184 strcpy(dst, "BLOCKED");
2185 break;
2186 default:
2187 strcpy(dst, "UNKNOWN");
2188 break;
2189 }
2190 }
2191
2192 static void power_mode_to_str(char *dst, struct nlattr *a)
2193 {
2194 enum nl80211_mesh_power_mode pm = nla_get_u32(a);
2195
2196 switch (pm) {
2197 case NL80211_MESH_POWER_ACTIVE:
2198 strcpy(dst, "ACTIVE");
2199 break;
2200 case NL80211_MESH_POWER_LIGHT_SLEEP:
2201 strcpy(dst, "LIGHT SLEEP");
2202 break;
2203 case NL80211_MESH_POWER_DEEP_SLEEP:
2204 strcpy(dst, "DEEP SLEEP");
2205 break;
2206 default:
2207 strcpy(dst, "UNKNOWN");
2208 break;
2209 }
2210 }
2211
2212 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
2213 {
2214 struct nl80211_array_buf *arr = arg;
2215 struct iwinfo_assoclist_entry *e = arr->buf;
2216 struct nlattr **attr = nl80211_parse(msg);
2217 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
2218 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
2219 struct nl80211_sta_flag_update *sta_flags;
2220
2221 static const struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
2222 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
2223 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
2224 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
2225 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
2226 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
2227 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
2228 [NL80211_STA_INFO_SIGNAL_AVG] = { .type = NLA_U8 },
2229 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
2230 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
2231 [NL80211_STA_INFO_RX_BYTES64] = { .type = NLA_U64 },
2232 [NL80211_STA_INFO_TX_BYTES64] = { .type = NLA_U64 },
2233 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 },
2234 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
2235 [NL80211_STA_INFO_CONNECTED_TIME]= { .type = NLA_U32 },
2236 [NL80211_STA_INFO_RX_DROP_MISC] = { .type = NLA_U64 },
2237 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 },
2238 [NL80211_STA_INFO_STA_FLAGS] =
2239 { .minlen = sizeof(struct nl80211_sta_flag_update) },
2240 [NL80211_STA_INFO_EXPECTED_THROUGHPUT] = { .type = NLA_U32 },
2241 /* mesh */
2242 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
2243 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
2244 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
2245 [NL80211_STA_INFO_LOCAL_PM] = { .type = NLA_U32 },
2246 [NL80211_STA_INFO_PEER_PM] = { .type = NLA_U32 },
2247 [NL80211_STA_INFO_NONPEER_PM] = { .type = NLA_U32 },
2248 };
2249
2250 static const struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
2251 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
2252 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
2253 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
2254 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
2255 };
2256
2257 /* advance to end of array */
2258 e += arr->count;
2259 memset(e, 0, sizeof(*e));
2260
2261 if (attr[NL80211_ATTR_MAC])
2262 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
2263
2264 if (attr[NL80211_ATTR_STA_INFO] &&
2265 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
2266 attr[NL80211_ATTR_STA_INFO], stats_policy))
2267 {
2268 if (sinfo[NL80211_STA_INFO_SIGNAL])
2269 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
2270
2271 if (sinfo[NL80211_STA_INFO_SIGNAL_AVG])
2272 e->signal_avg = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]);
2273
2274 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
2275 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
2276
2277 if (sinfo[NL80211_STA_INFO_CONNECTED_TIME])
2278 e->connected_time = nla_get_u32(sinfo[NL80211_STA_INFO_CONNECTED_TIME]);
2279
2280 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
2281 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
2282
2283 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
2284 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
2285
2286 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
2287 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
2288 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
2289 nl80211_parse_rateinfo(rinfo, &e->rx_rate);
2290
2291 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
2292 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
2293 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
2294 nl80211_parse_rateinfo(rinfo, &e->tx_rate);
2295
2296 if (sinfo[NL80211_STA_INFO_RX_BYTES64])
2297 e->rx_bytes = nla_get_u64(sinfo[NL80211_STA_INFO_RX_BYTES64]);
2298 else if (sinfo[NL80211_STA_INFO_RX_BYTES])
2299 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
2300
2301 if (sinfo[NL80211_STA_INFO_TX_BYTES64])
2302 e->tx_bytes = nla_get_u64(sinfo[NL80211_STA_INFO_TX_BYTES64]);
2303 else if (sinfo[NL80211_STA_INFO_TX_BYTES])
2304 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
2305
2306 if (sinfo[NL80211_STA_INFO_TX_RETRIES])
2307 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
2308
2309 if (sinfo[NL80211_STA_INFO_TX_FAILED])
2310 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
2311
2312 if (sinfo[NL80211_STA_INFO_T_OFFSET])
2313 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]);
2314
2315 if (sinfo[NL80211_STA_INFO_RX_DROP_MISC])
2316 e->rx_drop_misc = nla_get_u64(sinfo[NL80211_STA_INFO_RX_DROP_MISC]);
2317
2318 if (sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT])
2319 e->thr = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]);
2320
2321 /* mesh */
2322 if (sinfo[NL80211_STA_INFO_LLID])
2323 e->llid = nla_get_u16(sinfo[NL80211_STA_INFO_LLID]);
2324
2325 if (sinfo[NL80211_STA_INFO_PLID])
2326 e->plid = nla_get_u16(sinfo[NL80211_STA_INFO_PLID]);
2327
2328 if (sinfo[NL80211_STA_INFO_PLINK_STATE])
2329 plink_state_to_str(e->plink_state,
2330 nla_get_u8(sinfo[NL80211_STA_INFO_PLINK_STATE]));
2331
2332 if (sinfo[NL80211_STA_INFO_LOCAL_PM])
2333 power_mode_to_str(e->local_ps, sinfo[NL80211_STA_INFO_LOCAL_PM]);
2334 if (sinfo[NL80211_STA_INFO_PEER_PM])
2335 power_mode_to_str(e->peer_ps, sinfo[NL80211_STA_INFO_PEER_PM]);
2336 if (sinfo[NL80211_STA_INFO_NONPEER_PM])
2337 power_mode_to_str(e->nonpeer_ps, sinfo[NL80211_STA_INFO_NONPEER_PM]);
2338
2339 /* Station flags */
2340 if (sinfo[NL80211_STA_INFO_STA_FLAGS])
2341 {
2342 sta_flags = (struct nl80211_sta_flag_update *)
2343 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
2344
2345 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
2346 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
2347 e->is_authorized = 1;
2348
2349 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
2350 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
2351 e->is_authenticated = 1;
2352
2353 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
2354 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
2355 e->is_preamble_short = 1;
2356
2357 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
2358 sta_flags->set & BIT(NL80211_STA_FLAG_WME))
2359 e->is_wme = 1;
2360
2361 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
2362 sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
2363 e->is_mfp = 1;
2364
2365 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
2366 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2367 e->is_tdls = 1;
2368 }
2369 }
2370
2371 e->noise = 0; /* filled in by caller */
2372 arr->count++;
2373
2374 return NL_SKIP;
2375 }
2376
2377 static int nl80211_get_survey(const char *ifname, char *buf, int *len)
2378 {
2379 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2380 int rc;
2381
2382 rc = nl80211_request(ifname, NL80211_CMD_GET_SURVEY,
2383 NLM_F_DUMP, nl80211_get_survey_cb, &arr);
2384 if (!rc)
2385 *len = (arr.count * sizeof(struct iwinfo_survey_entry));
2386 else
2387 *len = 0;
2388
2389 return 0;
2390 }
2391
2392 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
2393 {
2394 DIR *d;
2395 int i, noise = 0;
2396 struct dirent *de;
2397 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2398 struct iwinfo_assoclist_entry *e;
2399
2400 if ((d = opendir("/sys/class/net")) != NULL)
2401 {
2402 while ((de = readdir(d)) != NULL)
2403 {
2404 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
2405 (!de->d_name[strlen(ifname)] ||
2406 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
2407 {
2408 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
2409 NLM_F_DUMP, nl80211_get_assoclist_cb, &arr);
2410 }
2411 }
2412
2413 closedir(d);
2414
2415 if (!nl80211_get_noise(ifname, &noise))
2416 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
2417 e->noise = noise;
2418
2419 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
2420 return 0;
2421 }
2422
2423 return -1;
2424 }
2425
2426 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
2427 {
2428 int *dbm_max = arg;
2429 int ch_cur, ch_cmp, bands_remain, freqs_remain;
2430
2431 struct nlattr **attr = nl80211_parse(msg);
2432 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2433 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2434 struct nlattr *band, *freq;
2435
2436 static const struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2437 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2438 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2439 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2440 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2441 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2442 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2443 };
2444
2445 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
2446 *dbm_max = -1;
2447
2448 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2449 {
2450 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
2451 nla_len(band), NULL);
2452
2453 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2454 {
2455 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2456 nla_data(freq), nla_len(freq), freq_policy);
2457
2458 ch_cmp = nl80211_freq2channel(nla_get_u32(
2459 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
2460
2461 if ((!ch_cur || (ch_cmp == ch_cur)) &&
2462 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
2463 {
2464 *dbm_max = (int)(0.01 * nla_get_u32(
2465 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
2466
2467 break;
2468 }
2469 }
2470 }
2471
2472 return NL_SKIP;
2473 }
2474
2475 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
2476 {
2477 int err, ch_cur;
2478 int dbm_max = -1, dbm_cur, dbm_cnt;
2479 struct iwinfo_txpwrlist_entry entry;
2480
2481 if (nl80211_get_channel(ifname, &ch_cur))
2482 ch_cur = 0;
2483
2484 /* initialize the value pointer with channel for callback */
2485 dbm_max = ch_cur;
2486
2487 err = nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2488 nl80211_get_txpwrlist_cb, &dbm_max);
2489
2490 if (!err)
2491 {
2492 for (dbm_cur = 0, dbm_cnt = 0;
2493 dbm_cur < dbm_max;
2494 dbm_cur++, dbm_cnt++)
2495 {
2496 entry.dbm = dbm_cur;
2497 entry.mw = iwinfo_dbm2mw(dbm_cur);
2498
2499 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2500 }
2501
2502 entry.dbm = dbm_max;
2503 entry.mw = iwinfo_dbm2mw(dbm_max);
2504
2505 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2506 dbm_cnt++;
2507
2508 *len = dbm_cnt * sizeof(entry);
2509 return 0;
2510 }
2511
2512 return -1;
2513 }
2514
2515 static void nl80211_get_scancrypto(char *spec, struct iwinfo_crypto_entry *c)
2516 {
2517 int wpa_version = 0;
2518 char *p, *q, *proto, *suites;
2519
2520 c->enabled = 0;
2521
2522 for (p = strtok_r(spec, "[]", &q); p; p = strtok_r(NULL, "[]", &q)) {
2523 if (!strcmp(p, "WEP")) {
2524 c->enabled = 1;
2525 c->auth_suites = IWINFO_KMGMT_NONE;
2526 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2527 c->pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2528 break;
2529 }
2530
2531 proto = strtok(p, "-");
2532 suites = strtok(NULL, "]");
2533
2534 if (!proto || !suites)
2535 continue;
2536
2537 if (!strcmp(proto, "WPA2") || !strcmp(proto, "RSN"))
2538 wpa_version = 2;
2539 else if (!strcmp(proto, "WPA"))
2540 wpa_version = 1;
2541 else
2542 continue;
2543
2544 c->enabled = 1;
2545
2546 parse_wpa_suites(suites, wpa_version, &c->wpa_version, &c->auth_suites);
2547 parse_wpa_ciphers(suites, &c->pair_ciphers);
2548 }
2549 }
2550
2551
2552 struct nl80211_scanlist {
2553 struct iwinfo_scanlist_entry *e;
2554 int len;
2555 };
2556
2557
2558 static void nl80211_get_scanlist_ie(struct nlattr **bss,
2559 struct iwinfo_scanlist_entry *e)
2560 {
2561 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2562 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2563 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
2564 int len;
2565
2566 while (ielen >= 2 && ielen >= ie[1])
2567 {
2568 switch (ie[0])
2569 {
2570 case 0: /* SSID */
2571 case 114: /* Mesh ID */
2572 if (e->ssid[0] == 0) {
2573 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
2574 memcpy(e->ssid, ie + 2, len);
2575 e->ssid[len] = 0;
2576 }
2577 break;
2578
2579 case 48: /* RSN */
2580 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
2581 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
2582 break;
2583
2584 case 221: /* Vendor */
2585 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
2586 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
2587 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
2588 break;
2589 case 61: /* HT operation */
2590 if (ie[1] >= 3) {
2591 e->ht_chan_info.primary_chan = ie[2];
2592 e->ht_chan_info.secondary_chan_off = ie[3] & 0x3;
2593 e->ht_chan_info.chan_width = (ie[4] & 0x4)>>2;
2594 }
2595 break;
2596 case 192: /* VHT operation */
2597 if (ie[1] >= 3) {
2598 e->vht_chan_info.chan_width = ie[2];
2599 e->vht_chan_info.center_chan_1 = ie[3];
2600 e->vht_chan_info.center_chan_2 = ie[4];
2601 }
2602 break;
2603 }
2604
2605 ielen -= ie[1] + 2;
2606 ie += ie[1] + 2;
2607 }
2608 }
2609
2610 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
2611 {
2612 int8_t rssi;
2613 uint16_t caps;
2614
2615 struct nl80211_scanlist *sl = arg;
2616 struct nlattr **tb = nl80211_parse(msg);
2617 struct nlattr *bss[NL80211_BSS_MAX + 1];
2618
2619 static const struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2620 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2621 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2622 [NL80211_BSS_BSSID] = { 0 },
2623 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2624 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2625 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
2626 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2627 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2628 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2629 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2630 [NL80211_BSS_BEACON_IES] = { 0 },
2631 };
2632
2633 if (!tb[NL80211_ATTR_BSS] ||
2634 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2635 bss_policy) ||
2636 !bss[NL80211_BSS_BSSID])
2637 {
2638 return NL_SKIP;
2639 }
2640
2641 if (bss[NL80211_BSS_CAPABILITY])
2642 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2643 else
2644 caps = 0;
2645
2646 memset(sl->e, 0, sizeof(*sl->e));
2647 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
2648
2649 if (caps & (1<<1))
2650 sl->e->mode = IWINFO_OPMODE_ADHOC;
2651 else if (caps & (1<<0))
2652 sl->e->mode = IWINFO_OPMODE_MASTER;
2653 else
2654 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
2655
2656 if (caps & (1<<4))
2657 sl->e->crypto.enabled = 1;
2658
2659 if (bss[NL80211_BSS_FREQUENCY])
2660 {
2661 sl->e->mhz = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
2662 sl->e->band = nl80211_freq2band(sl->e->mhz);
2663 sl->e->channel = nl80211_freq2channel(sl->e->mhz);
2664 }
2665
2666 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
2667 nl80211_get_scanlist_ie(bss, sl->e);
2668
2669 if (bss[NL80211_BSS_SIGNAL_MBM])
2670 {
2671 sl->e->signal =
2672 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
2673
2674 rssi = sl->e->signal - 0x100;
2675
2676 if (rssi < -110)
2677 rssi = -110;
2678 else if (rssi > -40)
2679 rssi = -40;
2680
2681 sl->e->quality = (rssi + 110);
2682 sl->e->quality_max = 70;
2683 }
2684
2685 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
2686 {
2687 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2688 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2689 }
2690
2691 sl->e++;
2692 sl->len++;
2693
2694 return NL_SKIP;
2695 }
2696
2697 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
2698 {
2699 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
2700
2701 if (nl80211_request(ifname, NL80211_CMD_TRIGGER_SCAN, 0, NULL, NULL))
2702 goto out;
2703
2704 if (nl80211_wait("nl80211", "scan",
2705 NL80211_CMD_NEW_SCAN_RESULTS, NL80211_CMD_SCAN_ABORTED))
2706 goto out;
2707
2708 if (nl80211_request(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
2709 nl80211_get_scanlist_cb, &sl))
2710 goto out;
2711
2712 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
2713 return 0;
2714
2715 out:
2716 *len = 0;
2717 return -1;
2718 }
2719
2720 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
2721 {
2722 #define hex(x) \
2723 (((x) >= 'a') ? ((x) - 'a' + 10) : \
2724 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0')))
2725
2726 int len = 0;
2727
2728 while (*in)
2729 {
2730 if (len + 1 >= outlen)
2731 break;
2732
2733 switch (*in)
2734 {
2735 case '\\':
2736 in++;
2737 switch (*in)
2738 {
2739 case 'n':
2740 out[len++] = '\n'; in++;
2741 break;
2742
2743 case 'r':
2744 out[len++] = '\r'; in++;
2745 break;
2746
2747 case 't':
2748 out[len++] = '\t'; in++;
2749 break;
2750
2751 case 'e':
2752 out[len++] = '\033'; in++;
2753 break;
2754
2755 case 'x':
2756 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
2757 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
2758 in += 3;
2759 break;
2760
2761 default:
2762 out[len++] = *in++;
2763 break;
2764 }
2765 break;
2766
2767 default:
2768 out[len++] = *in++;
2769 break;
2770 }
2771 }
2772
2773 if (outlen > len)
2774 out[len] = '\0';
2775
2776 return len;
2777 }
2778
2779 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len)
2780 {
2781 int sock, qmax, rssi, tries, count = -1, ready = 0;
2782 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096];
2783 struct sockaddr_un local = { 0 };
2784 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
2785
2786 sock = nl80211_wpactl_connect(ifname, &local);
2787
2788 if (sock < 0)
2789 return sock;
2790
2791 send(sock, "ATTACH", 6, 0);
2792 send(sock, "SCAN", 4, 0);
2793
2794 /*
2795 * wait for scan results:
2796 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan
2797 * 72 channels at most. We'll also receive two "OK" messages acknowledging
2798 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra
2799 * time to process the results, so try 72 + 2 + 1 times.
2800 */
2801 for (tries = 0; tries < 75; tries++)
2802 {
2803 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0)
2804 continue;
2805
2806 /* got an event notification */
2807 if (reply[0] == '<')
2808 {
2809 /* scan results are ready */
2810 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS"))
2811 {
2812 /* send "SCAN_RESULTS" command */
2813 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12);
2814 break;
2815 }
2816
2817 /* is another unrelated event, retry */
2818 tries--;
2819 }
2820
2821 /* scanning already in progress, keep awaiting results */
2822 else if (!strcmp(reply, "FAIL-BUSY\n"))
2823 {
2824 tries--;
2825 }
2826
2827 /* another failure, abort */
2828 else if (!strncmp(reply, "FAIL-", 5))
2829 {
2830 break;
2831 }
2832 }
2833
2834 /* receive and parse scan results if the wait above didn't time out */
2835 while (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
2836 {
2837 /* received an event notification, receive again */
2838 if (reply[0] == '<')
2839 continue;
2840
2841 nl80211_get_quality_max(ifname, &qmax);
2842
2843 for (line = strtok_r(reply, "\n", &pos);
2844 line != NULL;
2845 line = strtok_r(NULL, "\n", &pos))
2846 {
2847 /* skip header line */
2848 if (count < 0)
2849 {
2850 count++;
2851 continue;
2852 }
2853
2854 bssid = strtok(line, "\t");
2855 freq = strtok(NULL, "\t");
2856 signal = strtok(NULL, "\t");
2857 flags = strtok(NULL, "\t");
2858 ssid = strtok(NULL, "\n");
2859
2860 if (!bssid || !freq || !signal || !flags)
2861 continue;
2862
2863 /* BSSID */
2864 e->mac[0] = strtol(&bssid[0], NULL, 16);
2865 e->mac[1] = strtol(&bssid[3], NULL, 16);
2866 e->mac[2] = strtol(&bssid[6], NULL, 16);
2867 e->mac[3] = strtol(&bssid[9], NULL, 16);
2868 e->mac[4] = strtol(&bssid[12], NULL, 16);
2869 e->mac[5] = strtol(&bssid[15], NULL, 16);
2870
2871 /* SSID */
2872 if (ssid)
2873 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2874 else
2875 e->ssid[0] = 0;
2876
2877 /* Mode */
2878 if (strstr(flags, "[MESH]"))
2879 e->mode = IWINFO_OPMODE_MESHPOINT;
2880 else if (strstr(flags, "[IBSS]"))
2881 e->mode = IWINFO_OPMODE_ADHOC;
2882 else
2883 e->mode = IWINFO_OPMODE_MASTER;
2884
2885 /* Channel */
2886 e->mhz = atoi(freq);
2887 e->band = nl80211_freq2band(e->mhz);
2888 e->channel = nl80211_freq2channel(e->mhz);
2889
2890 /* Signal */
2891 rssi = atoi(signal);
2892 e->signal = rssi;
2893
2894 /* Quality */
2895 if (rssi < 0)
2896 {
2897 /* The cfg80211 wext compat layer assumes a signal range
2898 * of -110 dBm to -40 dBm, the quality value is derived
2899 * by adding 110 to the signal level */
2900 if (rssi < -110)
2901 rssi = -110;
2902 else if (rssi > -40)
2903 rssi = -40;
2904
2905 e->quality = (rssi + 110);
2906 }
2907 else
2908 {
2909 e->quality = rssi;
2910 }
2911
2912 /* Max. Quality */
2913 e->quality_max = qmax;
2914
2915 /* Crypto */
2916 nl80211_get_scancrypto(flags, &e->crypto);
2917
2918 count++;
2919 e++;
2920 }
2921
2922 *len = count * sizeof(struct iwinfo_scanlist_entry);
2923 break;
2924 }
2925
2926 close(sock);
2927 unlink(local.sun_path);
2928
2929 return (count >= 0) ? 0 : -1;
2930 }
2931
2932 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
2933 {
2934 char *res;
2935 int rv, mode;
2936
2937 *len = 0;
2938
2939 /* Got a radioX pseudo interface, find some interface on it or create one */
2940 if (!strncmp(ifname, "radio", 5))
2941 {
2942 /* Reuse existing interface */
2943 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2944 {
2945 return nl80211_get_scanlist(res, buf, len);
2946 }
2947
2948 /* Need to spawn a temporary iface for scanning */
2949 else if ((res = nl80211_ifadd(ifname)) != NULL)
2950 {
2951 rv = nl80211_get_scanlist(res, buf, len);
2952 nl80211_ifdel(res);
2953 return rv;
2954 }
2955 }
2956
2957 /* WPA supplicant */
2958 if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
2959 {
2960 return 0;
2961 }
2962
2963 /* station / ad-hoc / monitor scan */
2964 else if (!nl80211_get_mode(ifname, &mode) &&
2965 (mode == IWINFO_OPMODE_ADHOC ||
2966 mode == IWINFO_OPMODE_MASTER ||
2967 mode == IWINFO_OPMODE_CLIENT ||
2968 mode == IWINFO_OPMODE_MONITOR) &&
2969 iwinfo_ifup(ifname))
2970 {
2971 return nl80211_get_scanlist_nl(ifname, buf, len);
2972 }
2973
2974 /* AP scan */
2975 else
2976 {
2977 /* Got a temp interface, don't create yet another one */
2978 if (!strncmp(ifname, "tmp.", 4))
2979 {
2980 if (!iwinfo_ifup(ifname))
2981 return -1;
2982
2983 rv = nl80211_get_scanlist_nl(ifname, buf, len);
2984 iwinfo_ifdown(ifname);
2985 return rv;
2986 }
2987
2988 /* Spawn a new scan interface */
2989 else
2990 {
2991 if (!(res = nl80211_ifadd(ifname)))
2992 return -1;
2993
2994 iwinfo_ifmac(res);
2995
2996 /* if we can take the new interface up, the driver supports an
2997 * additional interface and there's no need to tear down the ap */
2998 if (iwinfo_ifup(res))
2999 {
3000 rv = nl80211_get_scanlist_nl(res, buf, len);
3001 iwinfo_ifdown(res);
3002 }
3003
3004 /* driver cannot create secondary interface, take down ap
3005 * during scan */
3006 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
3007 {
3008 rv = nl80211_get_scanlist_nl(res, buf, len);
3009 iwinfo_ifdown(res);
3010 iwinfo_ifup(ifname);
3011 nl80211_hostapd_hup(ifname);
3012 }
3013 else
3014 rv = -1;
3015
3016 nl80211_ifdel(res);
3017 return rv;
3018 }
3019 }
3020
3021 return -1;
3022 }
3023
3024 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
3025 {
3026 int bands_remain, freqs_remain;
3027
3028 struct nl80211_array_buf *arr = arg;
3029 struct iwinfo_freqlist_entry *e;
3030
3031 struct nlattr **attr = nl80211_parse(msg);
3032 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
3033 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
3034 struct nlattr *band, *freq;
3035
3036 e = arr->buf;
3037 e += arr->count;
3038
3039 if (attr[NL80211_ATTR_WIPHY_BANDS]) {
3040 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
3041 {
3042 nla_parse(bands, NL80211_BAND_ATTR_MAX,
3043 nla_data(band), nla_len(band), NULL);
3044
3045 if (bands[NL80211_BAND_ATTR_FREQS]) {
3046 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
3047 {
3048 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
3049 nla_data(freq), nla_len(freq), NULL);
3050
3051 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
3052 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
3053 continue;
3054
3055 e->band = nl80211_get_band(band->nla_type);
3056 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
3057 e->channel = nl80211_freq2channel(e->mhz);
3058
3059 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_MINUS])
3060 e->flags |= IWINFO_FREQ_NO_HT40MINUS;
3061 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_PLUS])
3062 e->flags |= IWINFO_FREQ_NO_HT40PLUS;
3063 if (freqs[NL80211_FREQUENCY_ATTR_NO_80MHZ])
3064 e->flags |= IWINFO_FREQ_NO_80MHZ;
3065 if (freqs[NL80211_FREQUENCY_ATTR_NO_160MHZ])
3066 e->flags |= IWINFO_FREQ_NO_160MHZ;
3067 if (freqs[NL80211_FREQUENCY_ATTR_NO_20MHZ])
3068 e->flags |= IWINFO_FREQ_NO_20MHZ;
3069 if (freqs[NL80211_FREQUENCY_ATTR_NO_10MHZ])
3070 e->flags |= IWINFO_FREQ_NO_10MHZ;
3071 if (freqs[NL80211_FREQUENCY_ATTR_NO_HE])
3072 e->flags |= IWINFO_FREQ_NO_HE;
3073 if (freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
3074 !freqs[NL80211_FREQUENCY_ATTR_RADAR])
3075 e->flags |= IWINFO_FREQ_NO_IR;
3076 if (freqs[NL80211_FREQUENCY_ATTR_INDOOR_ONLY])
3077 e->flags |= IWINFO_FREQ_INDOOR_ONLY;
3078
3079 /* keep backwards compatibility */
3080 e->restricted = (e->flags & IWINFO_FREQ_NO_IR) ? 1 : 0;
3081
3082 e++;
3083 arr->count++;
3084 }
3085 }
3086 }
3087 }
3088
3089 return NL_SKIP;
3090 }
3091
3092 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
3093 {
3094 struct nl80211_msg_conveyor *cv;
3095 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
3096 uint32_t features = nl80211_get_protocol_features(ifname);
3097 int flags;
3098
3099 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
3100 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
3101 if (!cv)
3102 goto out;
3103
3104 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
3105 if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr))
3106 goto out;
3107
3108 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
3109 return 0;
3110
3111 nla_put_failure:
3112 nl80211_free(cv);
3113 out:
3114 *len = 0;
3115 return -1;
3116 }
3117
3118 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
3119 {
3120 char *buf = arg;
3121 struct nlattr **attr = nl80211_parse(msg);
3122
3123 if (attr[NL80211_ATTR_REG_ALPHA2])
3124 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
3125 else
3126 buf[0] = 0;
3127
3128 return NL_SKIP;
3129 }
3130
3131 static int nl80211_get_country(const char *ifname, char *buf)
3132 {
3133 if (nl80211_request(ifname, NL80211_CMD_GET_REG, 0,
3134 nl80211_get_country_cb, buf))
3135 return -1;
3136
3137 return 0;
3138 }
3139
3140 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
3141 {
3142 int count;
3143 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
3144 const struct iwinfo_iso3166_label *l;
3145
3146 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
3147 {
3148 e->iso3166 = l->iso3166;
3149 e->ccode[0] = (l->iso3166 / 256);
3150 e->ccode[1] = (l->iso3166 % 256);
3151 e->ccode[2] = 0;
3152 }
3153
3154 *len = (count * sizeof(struct iwinfo_country_entry));
3155 return 0;
3156 }
3157
3158
3159 struct nl80211_modes
3160 {
3161 bool ok;
3162 uint32_t hw;
3163 uint32_t ht;
3164
3165 uint8_t bands;
3166
3167 uint16_t nl_ht;
3168 uint32_t nl_vht;
3169 uint16_t he_phy_cap[6];
3170 uint16_t eht_phy_cap[9];
3171 };
3172
3173 static void nl80211_eval_modelist(struct nl80211_modes *m)
3174 {
3175 /* Treat any nonzero capability as 11n */
3176 if (m->nl_ht > 0)
3177 {
3178 m->hw |= IWINFO_80211_N;
3179 m->ht |= IWINFO_HTMODE_HT20;
3180
3181 if (m->nl_ht & (1 << 1))
3182 m->ht |= IWINFO_HTMODE_HT40;
3183 }
3184
3185 if (m->he_phy_cap[0] != 0) {
3186 m->hw |= IWINFO_80211_AX;
3187 m->ht |= IWINFO_HTMODE_HE20;
3188
3189 if (m->he_phy_cap[0] & BIT(9))
3190 m->ht |= IWINFO_HTMODE_HE40;
3191 if (m->he_phy_cap[0] & BIT(10))
3192 m->ht |= IWINFO_HTMODE_HE40 | IWINFO_HTMODE_HE80;
3193 if (m->he_phy_cap[0] & BIT(11))
3194 m->ht |= IWINFO_HTMODE_HE160;
3195 if (m->he_phy_cap[0] & BIT(12))
3196 m->ht |= IWINFO_HTMODE_HE160 | IWINFO_HTMODE_HE80_80;
3197 }
3198
3199 if (m->eht_phy_cap[0] != 0) {
3200 m->hw |= IWINFO_80211_BE;
3201 m->ht |= IWINFO_HTMODE_EHT20;
3202
3203 if (m->he_phy_cap[0] & BIT(9))
3204 m->ht |= IWINFO_HTMODE_EHT40;
3205 if (m->he_phy_cap[0] & BIT(10))
3206 m->ht |= IWINFO_HTMODE_EHT40 | IWINFO_HTMODE_EHT80;
3207 if (m->he_phy_cap[0] & BIT(11))
3208 m->ht |= IWINFO_HTMODE_EHT160;
3209 if (m->he_phy_cap[0] & BIT(12))
3210 m->ht |= IWINFO_HTMODE_EHT160 | IWINFO_HTMODE_EHT80_80;
3211 if ((m->eht_phy_cap[0] & BIT(9)) && (m->bands & IWINFO_BAND_6))
3212 m->ht |= IWINFO_HTMODE_EHT320;
3213 }
3214
3215 if (m->bands & IWINFO_BAND_24)
3216 {
3217 m->hw |= IWINFO_80211_B;
3218 m->hw |= IWINFO_80211_G;
3219 }
3220
3221 if (m->bands & IWINFO_BAND_5)
3222 {
3223 /* Treat any nonzero capability as 11ac */
3224 if (m->nl_vht > 0)
3225 {
3226 m->hw |= IWINFO_80211_AC;
3227 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
3228
3229 switch ((m->nl_vht >> 2) & 3)
3230 {
3231 case 2:
3232 m->ht |= IWINFO_HTMODE_VHT80_80;
3233 /* fall through */
3234
3235 case 1:
3236 m->ht |= IWINFO_HTMODE_VHT160;
3237 }
3238 }
3239 else
3240 {
3241 m->hw |= IWINFO_80211_A;
3242 }
3243 }
3244
3245 if (m->bands & IWINFO_BAND_60)
3246 {
3247 m->hw |= IWINFO_80211_AD;
3248 }
3249
3250 }
3251
3252 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
3253 {
3254 struct nl80211_modes *m = arg;
3255 int bands_remain;
3256 struct nlattr **attr = nl80211_parse(msg);
3257 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
3258 struct nlattr *band;
3259
3260 if (attr[NL80211_ATTR_WIPHY_BANDS])
3261 {
3262 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
3263 {
3264 m->bands |= nl80211_get_band(band->nla_type);
3265
3266 nla_parse(bands, NL80211_BAND_ATTR_MAX,
3267 nla_data(band), nla_len(band), NULL);
3268
3269 if (bands[NL80211_BAND_ATTR_HT_CAPA])
3270 m->nl_ht = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
3271
3272 if (bands[NL80211_BAND_ATTR_VHT_CAPA])
3273 m->nl_vht = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
3274
3275 if (bands[NL80211_BAND_ATTR_IFTYPE_DATA]) {
3276 struct nlattr *tb[NL80211_BAND_IFTYPE_ATTR_MAX + 1];
3277 struct nlattr *nl_iftype;
3278 int rem_band;
3279 int len;
3280
3281 nla_for_each_nested(nl_iftype, bands[NL80211_BAND_ATTR_IFTYPE_DATA], rem_band) {
3282 nla_parse(tb, NL80211_BAND_IFTYPE_ATTR_MAX,
3283 nla_data(nl_iftype), nla_len(nl_iftype), NULL);
3284
3285 // HE
3286 if (tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]) {
3287 len = nla_len(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]);
3288
3289 if (len > sizeof(m->he_phy_cap) - 1)
3290 len = sizeof(m->he_phy_cap) - 1;
3291 memcpy(&((__u8 *)m->he_phy_cap)[1],
3292 nla_data(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]),
3293 len);
3294 }
3295
3296 // EHT
3297 if (tb[NL80211_BAND_IFTYPE_ATTR_EHT_CAP_PHY]) {
3298 len = nla_len(tb[NL80211_BAND_IFTYPE_ATTR_EHT_CAP_PHY]);
3299
3300 if (len > sizeof(m->eht_phy_cap) - 1)
3301 len = sizeof(m->eht_phy_cap) - 1;
3302 memcpy(&((uint8_t *)m->eht_phy_cap)[1],
3303 nla_data(tb[NL80211_BAND_IFTYPE_ATTR_EHT_CAP_PHY]),
3304 len);
3305 }
3306 }
3307 }
3308 }
3309
3310 m->ok = 1;
3311 }
3312
3313 return NL_SKIP;
3314 }
3315
3316 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
3317 {
3318 struct nl80211_msg_conveyor *cv;
3319 struct nl80211_modes m = {};
3320 uint32_t features = nl80211_get_protocol_features(ifname);
3321 int flags;
3322
3323 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
3324 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
3325 if (!cv)
3326 goto out;
3327
3328 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
3329 if (nl80211_send(cv, nl80211_get_modelist_cb, &m))
3330 goto nla_put_failure;
3331
3332 nl80211_eval_modelist(&m);
3333
3334 *buf = m.hw;
3335
3336 return 0;
3337
3338 nla_put_failure:
3339 nl80211_free(cv);
3340 out:
3341 return -1;
3342 }
3343
3344 struct chan_info {
3345 int width;
3346 int mode;
3347 };
3348
3349 static int nl80211_get_htmode_cb(struct nl_msg *msg, void *arg)
3350 {
3351 struct nlattr **tb = nl80211_parse(msg);
3352 struct nlattr *cur;
3353 struct chan_info *chn = arg;
3354
3355 if ((cur = tb[NL80211_ATTR_CHANNEL_WIDTH]))
3356 chn->width = nla_get_u32(cur);
3357
3358 if ((cur = tb[NL80211_ATTR_BSS_HT_OPMODE]))
3359 chn->mode = nla_get_u32(cur);
3360
3361 return NL_SKIP;
3362 }
3363
3364 static int nl80211_get_htmode(const char *ifname, int *buf)
3365 {
3366 struct chan_info chn = { 0 };
3367 char *res, b[2] = { 0 };
3368 int err;
3369 bool he = false;
3370 bool eht = false;
3371
3372 res = nl80211_phy2ifname(ifname);
3373 *buf = 0;
3374
3375 err = nl80211_request(res ? res : ifname,
3376 NL80211_CMD_GET_INTERFACE, 0,
3377 nl80211_get_htmode_cb, &chn);
3378 if (err)
3379 return -1;
3380
3381 if (nl80211_hostapd_query(res ? res : ifname, "ieee80211be", b, sizeof(b)))
3382 eht = b[0] == '1';
3383
3384 if (nl80211_hostapd_query(res ? res : ifname, "ieee80211ax", b, sizeof(b)))
3385 he = b[0] == '1';
3386 else if (nl80211_wpactl_query(res ? res : ifname, "wifi_generation", b, sizeof(b))) {
3387 he = b[0] == '6';
3388 eht = b[0] == '7';
3389 }
3390
3391 switch (chn.width) {
3392 case NL80211_CHAN_WIDTH_20:
3393 if (eht)
3394 *buf = IWINFO_HTMODE_EHT20;
3395 else if (he)
3396 *buf = IWINFO_HTMODE_HE20;
3397 else if (chn.mode == -1)
3398 *buf = IWINFO_HTMODE_VHT20;
3399 else
3400 *buf = IWINFO_HTMODE_HT20;
3401 break;
3402 case NL80211_CHAN_WIDTH_40:
3403 if (eht)
3404 *buf = IWINFO_HTMODE_EHT40;
3405 else if (he)
3406 *buf = IWINFO_HTMODE_HE40;
3407 else if (chn.mode == -1)
3408 *buf = IWINFO_HTMODE_VHT40;
3409 else
3410 *buf = IWINFO_HTMODE_HT40;
3411 break;
3412 case NL80211_CHAN_WIDTH_80:
3413 if (eht)
3414 *buf = IWINFO_HTMODE_EHT80;
3415 else if (he)
3416 *buf = IWINFO_HTMODE_HE80;
3417 else
3418 *buf = IWINFO_HTMODE_VHT80;
3419 break;
3420 case NL80211_CHAN_WIDTH_80P80:
3421 if (eht)
3422 *buf = IWINFO_HTMODE_EHT80_80;
3423 else if (he)
3424 *buf = IWINFO_HTMODE_HE80_80;
3425 else
3426 *buf = IWINFO_HTMODE_VHT80_80;
3427 break;
3428 case NL80211_CHAN_WIDTH_160:
3429 if (eht)
3430 *buf = IWINFO_HTMODE_EHT160;
3431 else if (he)
3432 *buf = IWINFO_HTMODE_HE160;
3433 else
3434 *buf = IWINFO_HTMODE_VHT160;
3435 break;
3436 case NL80211_CHAN_WIDTH_320:
3437 *buf = IWINFO_HTMODE_EHT320;
3438 break;
3439 case NL80211_CHAN_WIDTH_5:
3440 case NL80211_CHAN_WIDTH_10:
3441 case NL80211_CHAN_WIDTH_20_NOHT:
3442 *buf = IWINFO_HTMODE_NOHT;
3443 break;
3444 default:
3445 return -1;
3446 }
3447
3448 return 0;
3449 }
3450
3451 static int nl80211_get_htmodelist(const char *ifname, int *buf)
3452 {
3453 struct nl80211_msg_conveyor *cv;
3454 struct nl80211_modes m = {};
3455 uint32_t features = nl80211_get_protocol_features(ifname);
3456 int flags;
3457
3458 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
3459 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
3460 if (!cv)
3461 goto out;
3462
3463 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
3464 if (nl80211_send(cv, nl80211_get_modelist_cb, &m))
3465 goto nla_put_failure;
3466
3467 nl80211_eval_modelist(&m);
3468
3469 *buf = m.ht;
3470
3471 return 0;
3472
3473 nla_put_failure:
3474 nl80211_free(cv);
3475 out:
3476 return -1;
3477 }
3478
3479
3480 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
3481 {
3482 struct nlattr **attr = nl80211_parse(msg);
3483 struct nlattr *comb;
3484 int *ret = arg;
3485 int comb_rem, limit_rem, mode_rem;
3486
3487 *ret = 0;
3488 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
3489 return NL_SKIP;
3490
3491 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
3492 {
3493 static const struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
3494 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
3495 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
3496 };
3497 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1];
3498 static const struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
3499 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
3500 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
3501 };
3502 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1];
3503 struct nlattr *limit;
3504
3505 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy);
3506
3507 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
3508 continue;
3509
3510 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
3511 {
3512 struct nlattr *mode;
3513
3514 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
3515
3516 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
3517 !tb_limit[NL80211_IFACE_LIMIT_MAX])
3518 continue;
3519
3520 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
3521 continue;
3522
3523 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
3524 if (nla_type(mode) == NL80211_IFTYPE_AP)
3525 *ret = 1;
3526 }
3527 }
3528 }
3529
3530 return NL_SKIP;
3531 }
3532
3533 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
3534 {
3535 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
3536 nl80211_get_ifcomb_cb, buf))
3537 return -1;
3538
3539 return 0;
3540 }
3541
3542 static int nl80211_hardware_id_from_fdt(struct iwinfo_hardware_id *id, const char *ifname)
3543 {
3544 char *phy, path[PATH_MAX];
3545
3546 /* Try to determine the phy name from the given interface */
3547 phy = nl80211_ifname2phy(ifname);
3548
3549 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/of_node/compatible",
3550 phy ? "ieee80211" : "net", phy ? phy : ifname);
3551
3552 if (nl80211_readstr(path, id->compatible, sizeof(id->compatible)) <= 0)
3553 return -1;
3554
3555 return 0;
3556 }
3557
3558
3559 static int nl80211_get_hardware_id(const char *ifname, char *buf)
3560 {
3561 struct iwinfo_hardware_id *id = (struct iwinfo_hardware_id *)buf;
3562 char *phy, num[8], path[PATH_MAX];
3563 int i;
3564
3565 struct { const char *path; uint16_t *dest; } lookup[] = {
3566 { "vendor", &id->vendor_id },
3567 { "device", &id->device_id },
3568 { "subsystem_vendor", &id->subsystem_vendor_id },
3569 { "subsystem_device", &id->subsystem_device_id },
3570 { "../idVendor", &id->subsystem_vendor_id },
3571 { "../idProduct", &id->subsystem_device_id }
3572 };
3573
3574 memset(id, 0, sizeof(*id));
3575
3576 /* Try to determine the phy name from the given interface */
3577 phy = nl80211_ifname2phy(ifname);
3578
3579 for (i = 0; i < ARRAY_SIZE(lookup); i++)
3580 {
3581 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/%s",
3582 phy ? "ieee80211" : "net",
3583 phy ? phy : ifname, lookup[i].path);
3584
3585 if (nl80211_readstr(path, num, sizeof(num)) > 0)
3586 *lookup[i].dest = strtoul(num, NULL, 16);
3587 }
3588
3589 /* Failed to obtain hardware PCI/USB IDs... */
3590 if (id->vendor_id == 0 && id->device_id == 0 &&
3591 id->subsystem_vendor_id == 0 && id->subsystem_device_id == 0)
3592 /* ... first fallback to FDT ... */
3593 if (nl80211_hardware_id_from_fdt(id, ifname) == -1)
3594 /* ... then board config */
3595 return iwinfo_hardware_id_from_mtd(id);
3596
3597 return 0;
3598 }
3599
3600 static const struct iwinfo_hardware_entry *
3601 nl80211_get_hardware_entry(const char *ifname)
3602 {
3603 struct iwinfo_hardware_id id;
3604
3605 if (nl80211_get_hardware_id(ifname, (char *)&id))
3606 return NULL;
3607
3608 return iwinfo_hardware(&id);
3609 }
3610
3611 static int nl80211_get_hardware_name(const char *ifname, char *buf)
3612 {
3613 const struct iwinfo_hardware_entry *hw;
3614
3615 if (!(hw = nl80211_get_hardware_entry(ifname)))
3616 sprintf(buf, "Generic MAC80211");
3617 else
3618 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
3619
3620 return 0;
3621 }
3622
3623 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
3624 {
3625 const struct iwinfo_hardware_entry *hw;
3626
3627 if (!(hw = nl80211_get_hardware_entry(ifname)))
3628 return -1;
3629
3630 *buf = hw->txpower_offset;
3631 return 0;
3632 }
3633
3634 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
3635 {
3636 const struct iwinfo_hardware_entry *hw;
3637
3638 if (!(hw = nl80211_get_hardware_entry(ifname)))
3639 return -1;
3640
3641 *buf = hw->frequency_offset;
3642 return 0;
3643 }
3644
3645 static int nl80211_lookup_phyname(const char *section, char *buf)
3646 {
3647 const char *name;
3648 int idx;
3649
3650 if (!strncmp(section, "path=", 5))
3651 idx = nl80211_phy_idx_from_path(section + 5);
3652 else if (!strncmp(section, "macaddr=", 8))
3653 idx = nl80211_phy_idx_from_macaddr(section + 8);
3654 else
3655 idx = nl80211_phy_idx_from_uci(section);
3656
3657 if (idx < 0)
3658 return -1;
3659
3660 name = nl80211_phyidx2name(idx);
3661 if (!name)
3662 return -1;
3663
3664 strcpy(buf, name);
3665 return 0;
3666 }
3667
3668 static int nl80211_phy_path(const char *phyname, const char **path)
3669 {
3670 if (strchr(phyname, '/'))
3671 return -1;
3672
3673 *path = nl80211_phy_path_str(phyname);
3674 if (!*path)
3675 return -1;
3676
3677 return 0;
3678 }
3679
3680 const struct iwinfo_ops nl80211_ops = {
3681 .name = "nl80211",
3682 .probe = nl80211_probe,
3683 .channel = nl80211_get_channel,
3684 .center_chan1 = nl80211_get_center_chan1,
3685 .center_chan2 = nl80211_get_center_chan2,
3686 .frequency = nl80211_get_frequency,
3687 .frequency_offset = nl80211_get_frequency_offset,
3688 .txpower = nl80211_get_txpower,
3689 .txpower_offset = nl80211_get_txpower_offset,
3690 .bitrate = nl80211_get_bitrate,
3691 .signal = nl80211_get_signal,
3692 .noise = nl80211_get_noise,
3693 .quality = nl80211_get_quality,
3694 .quality_max = nl80211_get_quality_max,
3695 .mbssid_support = nl80211_get_mbssid_support,
3696 .hwmodelist = nl80211_get_hwmodelist,
3697 .htmodelist = nl80211_get_htmodelist,
3698 .htmode = nl80211_get_htmode,
3699 .mode = nl80211_get_mode,
3700 .ssid = nl80211_get_ssid,
3701 .bssid = nl80211_get_bssid,
3702 .country = nl80211_get_country,
3703 .hardware_id = nl80211_get_hardware_id,
3704 .hardware_name = nl80211_get_hardware_name,
3705 .encryption = nl80211_get_encryption,
3706 .phyname = nl80211_get_phyname,
3707 .assoclist = nl80211_get_assoclist,
3708 .txpwrlist = nl80211_get_txpwrlist,
3709 .scanlist = nl80211_get_scanlist,
3710 .freqlist = nl80211_get_freqlist,
3711 .countrylist = nl80211_get_countrylist,
3712 .survey = nl80211_get_survey,
3713 .lookup_phy = nl80211_lookup_phyname,
3714 .phy_path = nl80211_phy_path,
3715 .close = nl80211_close
3716 };
Library for accessing wireless device drivers