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iwinfo: readd missing define for IWINFO_AUTH in header
[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 snprintf(buffer, sizeof(buffer),
829 "/sys/class/ieee80211/phy%d/device/net", phyidx);
830
831 if ((d = opendir(buffer)) != NULL)
832 {
833 while ((e = readdir(d)) != NULL)
834 {
835 snprintf(buffer, sizeof(buffer),
836 "/sys/class/net/%s/ifindex", e->d_name);
837 cifidx = nl80211_readint(buffer);
838
839 if (cifidx < 0)
840 continue;
841
842 snprintf(buffer, sizeof(buffer),
843 "/sys/class/net/%s/link_mode", e->d_name);
844 clmode = nl80211_readint(buffer);
845
846 /* prefer non-supplicant-based devices */
847 if ((ifidx < 0) || (cifidx < ifidx) || ((lmode == 1) && (clmode != 1)))
848 {
849 ifidx = cifidx;
850 lmode = clmode;
851 strncpy(nif, e->d_name, sizeof(nif) - 1);
852 }
853 }
854
855 closedir(d);
856 }
857
858 return nif[0] ? nif : NULL;
859 }
860
861 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
862 {
863 int *mode = arg;
864 struct nlattr **tb = nl80211_parse(msg);
865 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
866 IWINFO_OPMODE_UNKNOWN, /* unspecified */
867 IWINFO_OPMODE_ADHOC, /* IBSS */
868 IWINFO_OPMODE_CLIENT, /* managed */
869 IWINFO_OPMODE_MASTER, /* AP */
870 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
871 IWINFO_OPMODE_WDS, /* WDS */
872 IWINFO_OPMODE_MONITOR, /* monitor */
873 IWINFO_OPMODE_MESHPOINT, /* mesh point */
874 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
875 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
876 };
877
878 if (tb[NL80211_ATTR_IFTYPE])
879 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
880
881 return NL_SKIP;
882 }
883
884
885 static int nl80211_get_mode(const char *ifname, int *buf)
886 {
887 char *res;
888
889 *buf = IWINFO_OPMODE_UNKNOWN;
890
891 res = nl80211_phy2ifname(ifname);
892
893 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
894 nl80211_get_mode_cb, buf);
895
896 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
897 }
898
899 static int __nl80211_hostapd_query(const char *ifname, ...)
900 {
901 va_list ap, ap_cur;
902 char *phy, *search, *dest, *key, *val, buf[128];
903 int len, mode, found = 0, match = 1;
904 FILE *fp;
905
906 if (nl80211_get_mode(ifname, &mode))
907 return 0;
908
909 if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN)
910 return 0;
911
912 phy = nl80211_ifname2phy(ifname);
913
914 if (!phy)
915 return 0;
916
917 snprintf(buf, sizeof(buf), "/var/run/hostapd-%s.conf", phy);
918 fp = fopen(buf, "r");
919
920 if (!fp)
921 return 0;
922
923 va_start(ap, ifname);
924
925 /* clear all destination buffers */
926 va_copy(ap_cur, ap);
927
928 while ((search = va_arg(ap_cur, char *)) != NULL)
929 {
930 dest = va_arg(ap_cur, char *);
931 len = va_arg(ap_cur, int);
932
933 memset(dest, 0, len);
934 }
935
936 va_end(ap_cur);
937
938 /* iterate applicable lines and copy found values into dest buffers */
939 while (fgets(buf, sizeof(buf), fp))
940 {
941 key = strtok(buf, " =\t\n");
942 val = strtok(NULL, "\n");
943
944 if (!key || !val || !*key || *key == '#')
945 continue;
946
947 if (!strcmp(key, "interface") || !strcmp(key, "bss"))
948 match = !strcmp(ifname, val);
949
950 if (!match)
951 continue;
952
953 va_copy(ap_cur, ap);
954
955 while ((search = va_arg(ap_cur, char *)) != NULL)
956 {
957 dest = va_arg(ap_cur, char *);
958 len = va_arg(ap_cur, int);
959
960 if (!strcmp(search, key))
961 {
962 strncpy(dest, val, len - 1);
963 found++;
964 break;
965 }
966 }
967
968 va_end(ap_cur);
969 }
970
971 fclose(fp);
972
973 va_end(ap);
974
975 return found;
976 }
977
978 #define nl80211_hostapd_query(ifname, ...) \
979 __nl80211_hostapd_query(ifname, ##__VA_ARGS__, NULL)
980
981
982 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
983 {
984 fd_set rfds;
985 struct timeval tv = { 0, 256000 };
986
987 FD_ZERO(&rfds);
988 FD_SET(sock, &rfds);
989
990 memset(buf, 0, blen);
991
992 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
993 return -1;
994
995 if (!FD_ISSET(sock, &rfds))
996 return -1;
997
998 return recv(sock, buf, blen - 1, 0);
999 }
1000
1001 static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local)
1002 {
1003 struct sockaddr_un remote = { 0 };
1004 size_t remote_length, local_length;
1005
1006 int sock = socket(PF_UNIX, SOCK_DGRAM, 0);
1007 if (sock < 0)
1008 return sock;
1009
1010 remote.sun_family = AF_UNIX;
1011 remote_length = sizeof(remote.sun_family) +
1012 sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname);
1013
1014 /* Set client socket file permissions so that bind() creates the client
1015 * socket with these permissions and there is no need to try to change
1016 * them with chmod() after bind() which would have potential issues with
1017 * race conditions. These permissions are needed to make sure the server
1018 * side (wpa_supplicant or hostapd) can reply to the control interface
1019 * messages.
1020 *
1021 * The lchown() calls below after bind() are also part of the needed
1022 * operations to allow the response to go through. Those are using the
1023 * no-deference-symlinks version to avoid races. */
1024 fchmod(sock, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
1025
1026 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
1027 {
1028 close(sock);
1029 return -1;
1030 }
1031
1032 if (connect(sock, (struct sockaddr *)&remote, remote_length))
1033 {
1034 close(sock);
1035 return -1;
1036 }
1037
1038 local->sun_family = AF_UNIX;
1039 local_length = sizeof(local->sun_family) +
1040 sprintf(local->sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
1041
1042 if (bind(sock, (struct sockaddr *)local, local_length) < 0)
1043 {
1044 close(sock);
1045 return -1;
1046 }
1047
1048 /* Set group even if we do not have privileges to change owner */
1049 lchown(local->sun_path, -1, 101);
1050 lchown(local->sun_path, 101, 101);
1051
1052 return sock;
1053 }
1054
1055 static int __nl80211_wpactl_query(const char *ifname, ...)
1056 {
1057 va_list ap, ap_cur;
1058 struct sockaddr_un local = { 0 };
1059 int len, mode, found = 0, sock = -1;
1060 char *search, *dest, *key, *val, *line, *pos, buf[512];
1061
1062 if (nl80211_get_mode(ifname, &mode))
1063 return 0;
1064
1065 if (mode != IWINFO_OPMODE_CLIENT &&
1066 mode != IWINFO_OPMODE_ADHOC &&
1067 mode != IWINFO_OPMODE_MESHPOINT)
1068 return 0;
1069
1070 sock = nl80211_wpactl_connect(ifname, &local);
1071
1072 if (sock < 0)
1073 return 0;
1074
1075 va_start(ap, ifname);
1076
1077 /* clear all destination buffers */
1078 va_copy(ap_cur, ap);
1079
1080 while ((search = va_arg(ap_cur, char *)) != NULL)
1081 {
1082 dest = va_arg(ap_cur, char *);
1083 len = va_arg(ap_cur, int);
1084
1085 memset(dest, 0, len);
1086 }
1087
1088 va_end(ap_cur);
1089
1090 send(sock, "STATUS", 6, 0);
1091
1092 while (true)
1093 {
1094 if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0)
1095 break;
1096
1097 if (buf[0] == '<')
1098 continue;
1099
1100 for (line = strtok_r(buf, "\n", &pos);
1101 line != NULL;
1102 line = strtok_r(NULL, "\n", &pos))
1103 {
1104 key = strtok(line, "=");
1105 val = strtok(NULL, "\n");
1106
1107 if (!key || !val)
1108 continue;
1109
1110 va_copy(ap_cur, ap);
1111
1112 while ((search = va_arg(ap_cur, char *)) != NULL)
1113 {
1114 dest = va_arg(ap_cur, char *);
1115 len = va_arg(ap_cur, int);
1116
1117 if (!strcmp(search, key))
1118 {
1119 strncpy(dest, val, len - 1);
1120 found++;
1121 break;
1122 }
1123 }
1124
1125 va_end(ap_cur);
1126 }
1127
1128 break;
1129 }
1130
1131 va_end(ap);
1132
1133 close(sock);
1134 unlink(local.sun_path);
1135
1136 return found;
1137 }
1138
1139 #define nl80211_wpactl_query(ifname, ...) \
1140 __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL)
1141
1142
1143 static char * nl80211_ifadd(const char *ifname)
1144 {
1145 char path[PATH_MAX];
1146 static char nif[IFNAMSIZ] = { 0 };
1147 struct nl80211_msg_conveyor *req;
1148 FILE *sysfs;
1149
1150 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
1151 if (req)
1152 {
1153 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
1154
1155 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
1156 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
1157
1158 nl80211_send(req, NULL, NULL);
1159
1160 snprintf(path, sizeof(path) - 1,
1161 "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif);
1162
1163 if ((sysfs = fopen(path, "w")) != NULL)
1164 {
1165 fwrite("0\n", 1, 2, sysfs);
1166 fclose(sysfs);
1167 }
1168
1169 return nif;
1170
1171 nla_put_failure:
1172 nl80211_free(req);
1173 }
1174
1175 return NULL;
1176 }
1177
1178 static void nl80211_ifdel(const char *ifname)
1179 {
1180 struct nl80211_msg_conveyor *req;
1181
1182 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
1183 if (req)
1184 {
1185 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
1186
1187 nl80211_send(req, NULL, NULL);
1188 return;
1189
1190 nla_put_failure:
1191 nl80211_free(req);
1192 }
1193 }
1194
1195 static void nl80211_hostapd_hup(const char *ifname)
1196 {
1197 int fd, pid = 0;
1198 char buf[32];
1199 char *phy = nl80211_ifname2phy(ifname);
1200
1201 if (phy)
1202 {
1203 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
1204 if ((fd = open(buf, O_RDONLY)) >= 0)
1205 {
1206 if (read(fd, buf, sizeof(buf)) > 0)
1207 pid = atoi(buf);
1208
1209 close(fd);
1210 }
1211
1212 if (pid > 0)
1213 kill(pid, 1);
1214 }
1215 }
1216
1217
1218 static int nl80211_probe(const char *ifname)
1219 {
1220 return !!nl80211_ifname2phy(ifname);
1221 }
1222
1223 struct nl80211_ssid_bssid {
1224 unsigned char *ssid;
1225 unsigned char bssid[7];
1226 };
1227
1228 static int nl80211_get_macaddr_cb(struct nl_msg *msg, void *arg)
1229 {
1230 struct nl80211_ssid_bssid *sb = arg;
1231 struct nlattr **tb = nl80211_parse(msg);
1232
1233 if (tb[NL80211_ATTR_MAC]) {
1234 sb->bssid[0] = 1;
1235 memcpy(sb->bssid + 1, nla_data(tb[NL80211_ATTR_MAC]),
1236 sizeof(sb->bssid) - 1);
1237 }
1238
1239 return NL_SKIP;
1240 }
1241
1242 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
1243 {
1244 int ielen;
1245 unsigned char *ie;
1246 struct nl80211_ssid_bssid *sb = arg;
1247 struct nlattr **tb = nl80211_parse(msg);
1248 struct nlattr *bss[NL80211_BSS_MAX + 1];
1249
1250 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1251 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
1252 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1253 };
1254
1255 if (!tb[NL80211_ATTR_BSS] ||
1256 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1257 bss_policy) ||
1258 !bss[NL80211_BSS_BSSID] ||
1259 !bss[NL80211_BSS_STATUS] ||
1260 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
1261 {
1262 return NL_SKIP;
1263 }
1264
1265 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
1266 {
1267 case NL80211_BSS_STATUS_ASSOCIATED:
1268 case NL80211_BSS_STATUS_AUTHENTICATED:
1269 case NL80211_BSS_STATUS_IBSS_JOINED:
1270
1271 if (sb->ssid)
1272 {
1273 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1274 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1275
1276 while (ielen >= 2 && ielen >= ie[1])
1277 {
1278 if (ie[0] == 0)
1279 {
1280 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1281 return NL_SKIP;
1282 }
1283
1284 ielen -= ie[1] + 2;
1285 ie += ie[1] + 2;
1286 }
1287 }
1288 else
1289 {
1290 sb->bssid[0] = 1;
1291 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
1292 return NL_SKIP;
1293 }
1294
1295 default:
1296 return NL_SKIP;
1297 }
1298 }
1299
1300 static int nl80211_get_ssid(const char *ifname, char *buf)
1301 {
1302 char *res;
1303 struct nl80211_ssid_bssid sb = { .ssid = (unsigned char *)buf };
1304
1305 /* try to find ssid from scan dump results */
1306 res = nl80211_phy2ifname(ifname);
1307 sb.ssid[0] = 0;
1308
1309 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1310 nl80211_get_ssid_bssid_cb, &sb);
1311
1312 /* failed, try to find from hostapd info */
1313 if (sb.ssid[0] == 0)
1314 nl80211_hostapd_query(ifname, "ssid", sb.ssid,
1315 IWINFO_ESSID_MAX_SIZE + 1);
1316
1317 /* failed, try to obtain Mesh ID */
1318 if (sb.ssid[0] == 0)
1319 iwinfo_ubus_query(res ? res : ifname, "mesh_id",
1320 buf, IWINFO_ESSID_MAX_SIZE + 1);
1321
1322 return (sb.ssid[0] == 0) ? -1 : 0;
1323 }
1324
1325 static int nl80211_get_bssid(const char *ifname, char *buf)
1326 {
1327 char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")];
1328 struct nl80211_ssid_bssid sb = { };
1329
1330 res = nl80211_phy2ifname(ifname);
1331
1332 /* try to obtain mac address via NL80211_CMD_GET_INTERFACE */
1333 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1334 nl80211_get_macaddr_cb, &sb);
1335
1336 /* failed, try to find bssid from scan dump results */
1337 if (sb.bssid[0] == 0)
1338 nl80211_request(res ? res : ifname,
1339 NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1340 nl80211_get_ssid_bssid_cb, &sb);
1341
1342 /* failed, try to find mac from hostapd info */
1343 if ((sb.bssid[0] == 0) &&
1344 nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid)))
1345 {
1346 sb.bssid[0] = 1;
1347 sb.bssid[1] = strtol(&bssid[0], NULL, 16);
1348 sb.bssid[2] = strtol(&bssid[3], NULL, 16);
1349 sb.bssid[3] = strtol(&bssid[6], NULL, 16);
1350 sb.bssid[4] = strtol(&bssid[9], NULL, 16);
1351 sb.bssid[5] = strtol(&bssid[12], NULL, 16);
1352 sb.bssid[6] = strtol(&bssid[15], NULL, 16);
1353 }
1354
1355 if (sb.bssid[0])
1356 {
1357 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
1358 sb.bssid[1], sb.bssid[2], sb.bssid[3],
1359 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
1360
1361 return 0;
1362 }
1363
1364 return -1;
1365 }
1366
1367
1368 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
1369 {
1370 int *freq = arg;
1371 struct nlattr **attr = nl80211_parse(msg);
1372 struct nlattr *binfo[NL80211_BSS_MAX + 1];
1373
1374 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1375 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1376 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1377 };
1378
1379 if (attr[NL80211_ATTR_BSS] &&
1380 !nla_parse_nested(binfo, NL80211_BSS_MAX,
1381 attr[NL80211_ATTR_BSS], bss_policy))
1382 {
1383 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
1384 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
1385 }
1386
1387 return NL_SKIP;
1388 }
1389
1390 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
1391 {
1392 int *freq = arg;
1393 struct nlattr **tb = nl80211_parse(msg);
1394
1395 if (tb[NL80211_ATTR_WIPHY_FREQ])
1396 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
1397
1398 return NL_SKIP;
1399 }
1400
1401 static int nl80211_get_frequency(const char *ifname, int *buf)
1402 {
1403 char *res, channel[4] = { 0 }, hwmode[3] = { 0 }, ax[2] = { 0 };
1404
1405 /* try to find frequency from interface info */
1406 res = nl80211_phy2ifname(ifname);
1407 *buf = 0;
1408
1409 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1410 nl80211_get_frequency_info_cb, buf);
1411
1412 /* failed, try to find frequency from hostapd info */
1413 if ((*buf == 0) &&
1414 nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode),
1415 "channel", channel, sizeof(channel),
1416 "ieee80211ax", ax, sizeof(ax)) >= 2)
1417 {
1418 *buf = nl80211_channel2freq(atoi(channel), hwmode, ax[0] == '1');
1419 }
1420
1421 /* failed, try to find frequency from scan results */
1422 if (*buf == 0)
1423 {
1424 res = nl80211_phy2ifname(ifname);
1425
1426 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1427 nl80211_get_frequency_scan_cb, buf);
1428 }
1429
1430 return (*buf == 0) ? -1 : 0;
1431 }
1432
1433 static int nl80211_get_center_freq1_cb(struct nl_msg *msg, void *arg)
1434 {
1435 int *freq = arg;
1436 struct nlattr **tb = nl80211_parse(msg);
1437
1438 if (tb[NL80211_ATTR_CENTER_FREQ1])
1439 *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ1]);
1440
1441 return NL_SKIP;
1442 }
1443
1444 static int nl80211_get_center_freq1(const char *ifname, int *buf)
1445 {
1446 char *res;
1447
1448 /* try to find frequency from interface info */
1449 res = nl80211_phy2ifname(ifname);
1450 *buf = 0;
1451
1452 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1453 nl80211_get_center_freq1_cb, buf);
1454
1455 return (*buf == 0) ? -1 : 0;
1456 }
1457
1458 static int nl80211_get_center_freq2_cb(struct nl_msg *msg, void *arg)
1459 {
1460 int *freq = arg;
1461 struct nlattr **tb = nl80211_parse(msg);
1462
1463 if (tb[NL80211_ATTR_CENTER_FREQ2])
1464 *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ2]);
1465
1466 return NL_SKIP;
1467 }
1468
1469 static int nl80211_get_center_freq2(const char *ifname, int *buf)
1470 {
1471 char *res;
1472
1473 /* try to find frequency from interface info */
1474 res = nl80211_phy2ifname(ifname);
1475 *buf = 0;
1476
1477 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1478 nl80211_get_center_freq2_cb, buf);
1479
1480 return (*buf == 0) ? -1 : 0;
1481 }
1482
1483 static int nl80211_get_channel(const char *ifname, int *buf)
1484 {
1485 if (!nl80211_get_frequency(ifname, buf))
1486 {
1487 *buf = nl80211_freq2channel(*buf);
1488 return 0;
1489 }
1490
1491 return -1;
1492 }
1493
1494 static int nl80211_get_center_chan1(const char *ifname, int *buf)
1495 {
1496 if (!nl80211_get_center_freq1(ifname, buf))
1497 {
1498 *buf = nl80211_freq2channel(*buf);
1499 return 0;
1500 }
1501
1502 return -1;
1503 }
1504
1505 static int nl80211_get_center_chan2(const char *ifname, int *buf)
1506 {
1507 if (!nl80211_get_center_freq2(ifname, buf))
1508 {
1509 *buf = nl80211_freq2channel(*buf);
1510 return 0;
1511 }
1512
1513 return -1;
1514 }
1515
1516 static int nl80211_get_txpower_cb(struct nl_msg *msg, void *arg)
1517 {
1518 int *buf = arg;
1519 struct nlattr **tb = nl80211_parse(msg);
1520
1521 if (tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL])
1522 *buf = iwinfo_mbm2dbm(nla_get_u32(tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL]));
1523
1524 return NL_SKIP;
1525 }
1526
1527 static int nl80211_get_txpower(const char *ifname, int *buf)
1528 {
1529 char *res;
1530
1531 res = nl80211_phy2ifname(ifname);
1532 *buf = 0;
1533
1534 if (nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1535 nl80211_get_txpower_cb, buf))
1536 return -1;
1537
1538 return 0;
1539 }
1540
1541
1542 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1543 {
1544 int8_t dbm;
1545 int16_t mbit;
1546 struct nl80211_rssi_rate *rr = arg;
1547 struct nlattr **attr = nl80211_parse(msg);
1548 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1549 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1550
1551 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1552 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1553 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1554 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1555 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1556 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1557 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1558 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1559 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1560 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1561 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1562 };
1563
1564 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1565 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1566 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1567 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1568 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1569 };
1570
1571 if (attr[NL80211_ATTR_STA_INFO])
1572 {
1573 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1574 attr[NL80211_ATTR_STA_INFO], stats_policy))
1575 {
1576 if (sinfo[NL80211_STA_INFO_SIGNAL])
1577 {
1578 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1579 rr->rssi = (rr->rssi * rr->rssi_samples + dbm) / (rr->rssi_samples + 1);
1580 rr->rssi_samples++;
1581 }
1582
1583 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1584 {
1585 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1586 sinfo[NL80211_STA_INFO_TX_BITRATE],
1587 rate_policy))
1588 {
1589 if (rinfo[NL80211_RATE_INFO_BITRATE])
1590 {
1591 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1592 rr->rate = (rr->rate * rr->rate_samples + mbit) / (rr->rate_samples + 1);
1593 rr->rate_samples++;
1594 }
1595 }
1596 }
1597 }
1598 }
1599
1600 return NL_SKIP;
1601 }
1602
1603 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1604 {
1605 DIR *d;
1606 struct dirent *de;
1607
1608 memset(r, 0, sizeof(*r));
1609
1610 if ((d = opendir("/sys/class/net")) != NULL)
1611 {
1612 while ((de = readdir(d)) != NULL)
1613 {
1614 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1615 (!de->d_name[strlen(ifname)] ||
1616 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1617 {
1618 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
1619 NLM_F_DUMP, nl80211_fill_signal_cb, r);
1620 }
1621 }
1622
1623 closedir(d);
1624 }
1625 }
1626
1627 static int nl80211_get_bitrate(const char *ifname, int *buf)
1628 {
1629 struct nl80211_rssi_rate rr;
1630
1631 nl80211_fill_signal(ifname, &rr);
1632
1633 if (rr.rate_samples)
1634 {
1635 *buf = (rr.rate * 100);
1636 return 0;
1637 }
1638
1639 return -1;
1640 }
1641
1642 static int nl80211_get_signal(const char *ifname, int *buf)
1643 {
1644 struct nl80211_rssi_rate rr;
1645
1646 nl80211_fill_signal(ifname, &rr);
1647
1648 if (rr.rssi_samples)
1649 {
1650 *buf = rr.rssi;
1651 return 0;
1652 }
1653
1654 return -1;
1655 }
1656
1657 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1658 {
1659 int8_t *noise = arg;
1660 struct nlattr **tb = nl80211_parse(msg);
1661 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1662
1663 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1664 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1665 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1666 };
1667
1668 if (!tb[NL80211_ATTR_SURVEY_INFO])
1669 return NL_SKIP;
1670
1671 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1672 tb[NL80211_ATTR_SURVEY_INFO], sp))
1673 return NL_SKIP;
1674
1675 if (!si[NL80211_SURVEY_INFO_NOISE])
1676 return NL_SKIP;
1677
1678 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1679 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1680
1681 return NL_SKIP;
1682 }
1683
1684
1685 static int nl80211_get_noise(const char *ifname, int *buf)
1686 {
1687 int8_t noise = 0;
1688
1689 if (nl80211_request(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP,
1690 nl80211_get_noise_cb, &noise))
1691 goto out;
1692
1693 *buf = noise;
1694 return 0;
1695
1696 out:
1697 *buf = 0;
1698 return -1;
1699 }
1700
1701 static int nl80211_get_quality(const char *ifname, int *buf)
1702 {
1703 int signal;
1704
1705 if (!nl80211_get_signal(ifname, &signal))
1706 {
1707 /* A positive signal level is usually just a quality
1708 * value, pass through as-is */
1709 if (signal >= 0)
1710 {
1711 *buf = signal;
1712 }
1713
1714 /* The cfg80211 wext compat layer assumes a signal range
1715 * of -110 dBm to -40 dBm, the quality value is derived
1716 * by adding 110 to the signal level */
1717 else
1718 {
1719 if (signal < -110)
1720 signal = -110;
1721 else if (signal > -40)
1722 signal = -40;
1723
1724 *buf = (signal + 110);
1725 }
1726
1727 return 0;
1728 }
1729
1730 return -1;
1731 }
1732
1733 static int nl80211_get_quality_max(const char *ifname, int *buf)
1734 {
1735 /* The cfg80211 wext compat layer assumes a maximum
1736 * quality of 70 */
1737 *buf = 70;
1738
1739 return 0;
1740 }
1741
1742 static int nl80211_check_wepkey(const char *key)
1743 {
1744 if (key && *key)
1745 {
1746 switch (strlen(key))
1747 {
1748 case 5:
1749 case 10:
1750 return IWINFO_CIPHER_WEP40;
1751
1752 case 13:
1753 case 26:
1754 return IWINFO_CIPHER_WEP104;
1755 }
1756 }
1757
1758 return 0;
1759 }
1760
1761 static struct {
1762 const char *match;
1763 int version;
1764 int suite;
1765 } wpa_key_mgmt_strings[] = {
1766 { "IEEE 802.1X/EAP", 0, IWINFO_KMGMT_8021x },
1767 { "EAP-SUITE-B-192", 4, IWINFO_KMGMT_8021x },
1768 { "EAP-SUITE-B", 4, IWINFO_KMGMT_8021x },
1769 { "EAP-SHA384", 4, IWINFO_KMGMT_8021x },
1770 { "EAP-SHA256", 0, IWINFO_KMGMT_8021x },
1771 { "PSK-SHA256", 0, IWINFO_KMGMT_PSK },
1772 { "NONE", 0, IWINFO_KMGMT_NONE },
1773 { "None", 0, IWINFO_KMGMT_NONE },
1774 { "PSK", 0, IWINFO_KMGMT_PSK },
1775 { "EAP", 0, IWINFO_KMGMT_8021x },
1776 { "SAE", 4, IWINFO_KMGMT_SAE },
1777 { "OWE", 4, IWINFO_KMGMT_OWE }
1778 };
1779
1780 static void parse_wpa_suites(const char *str, int defversion,
1781 uint8_t *versions, uint8_t *suites)
1782 {
1783 size_t l;
1784 int i, version;
1785 const char *p, *q, *m, *sep = " \t\n,-+/";
1786
1787 for (p = str; *p; )
1788 {
1789 q = p;
1790
1791 for (i = 0; i < ARRAY_SIZE(wpa_key_mgmt_strings); i++)
1792 {
1793 m = wpa_key_mgmt_strings[i].match;
1794 l = strlen(m);
1795
1796 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l])))
1797 {
1798 if (wpa_key_mgmt_strings[i].version != 0)
1799 version = wpa_key_mgmt_strings[i].version;
1800 else
1801 version = defversion;
1802
1803 *versions |= version;
1804 *suites |= wpa_key_mgmt_strings[i].suite;
1805
1806 q += l;
1807 break;
1808 }
1809 }
1810
1811 if (q == p)
1812 q += strcspn(q, sep);
1813
1814 p = q + strspn(q, sep);
1815 }
1816 }
1817
1818 static struct {
1819 const char *match;
1820 int cipher;
1821 } wpa_cipher_strings[] = {
1822 { "WEP-104", IWINFO_CIPHER_WEP104 },
1823 { "WEP-40", IWINFO_CIPHER_WEP40 },
1824 { "NONE", IWINFO_CIPHER_NONE },
1825 { "TKIP", IWINFO_CIPHER_TKIP },
1826 { "CCMP-256",IWINFO_CIPHER_CCMP256 },
1827 { "CCMP", IWINFO_CIPHER_CCMP },
1828 { "GCMP-256",IWINFO_CIPHER_GCMP256 },
1829 { "GCMP", IWINFO_CIPHER_GCMP }
1830 };
1831
1832 static void parse_wpa_ciphers(const char *str, uint16_t *ciphers)
1833 {
1834 int i;
1835 size_t l;
1836 const char *m, *p, *q, *sep = " \t\n,-+/";
1837
1838 for (p = str; *p; )
1839 {
1840 q = p;
1841
1842 for (i = 0; i < ARRAY_SIZE(wpa_cipher_strings); i++)
1843 {
1844 m = wpa_cipher_strings[i].match;
1845 l = strlen(m);
1846
1847 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l])))
1848 {
1849 *ciphers |= wpa_cipher_strings[i].cipher;
1850
1851 q += l;
1852 break;
1853 }
1854 }
1855
1856 if (q == p)
1857 q += strcspn(q, sep);
1858
1859 p = q + strspn(q, sep);
1860 }
1861 }
1862
1863 static int nl80211_get_encryption(const char *ifname, char *buf)
1864 {
1865 char *p;
1866 int opmode;
1867 uint8_t wpa_version = 0;
1868 char wpa[2], wpa_key_mgmt[64], wpa_pairwise[16], wpa_groupwise[16];
1869 char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27];
1870 char mode[16];
1871
1872 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1873
1874 /* WPA supplicant */
1875 if (nl80211_wpactl_query(ifname,
1876 "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise),
1877 "group_cipher", wpa_groupwise, sizeof(wpa_groupwise),
1878 "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1879 "mode", mode, sizeof(mode)))
1880 {
1881 /* WEP or Open */
1882 if (!strcmp(wpa_key_mgmt, "NONE"))
1883 {
1884 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1885 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers);
1886
1887 if (c->pair_ciphers != 0 && c->pair_ciphers != IWINFO_CIPHER_NONE) {
1888 c->enabled = 1;
1889 c->auth_suites = IWINFO_KMGMT_NONE;
1890 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1891 }
1892 else {
1893 c->pair_ciphers = 0;
1894 c->group_ciphers = 0;
1895 }
1896 }
1897
1898 /* MESH with SAE */
1899 else if (!strcmp(mode, "mesh") && !strcmp(wpa_key_mgmt, "UNKNOWN"))
1900 {
1901 c->enabled = 1;
1902 c->wpa_version = 4;
1903 c->auth_suites = IWINFO_KMGMT_SAE;
1904 c->pair_ciphers = IWINFO_CIPHER_CCMP;
1905 c->group_ciphers = IWINFO_CIPHER_CCMP;
1906 }
1907
1908 /* WPA */
1909 else
1910 {
1911 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1912 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers);
1913
1914 p = wpa_key_mgmt;
1915
1916 if (!strncmp(p, "WPA2-", 5) || !strncmp(p, "WPA2/", 5))
1917 {
1918 p += 5;
1919 wpa_version = 2;
1920 }
1921 else if (!strncmp(p, "WPA-", 4))
1922 {
1923 p += 4;
1924 wpa_version = 1;
1925 }
1926
1927 parse_wpa_suites(p, wpa_version, &c->wpa_version, &c->auth_suites);
1928
1929 c->enabled = !!(c->wpa_version && c->auth_suites);
1930 }
1931
1932 return 0;
1933 }
1934
1935 /* Hostapd */
1936 else if (nl80211_hostapd_query(ifname,
1937 "wpa", wpa, sizeof(wpa),
1938 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1939 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise),
1940 "auth_algs", auth_algs, sizeof(auth_algs),
1941 "wep_key0", wep_key0, sizeof(wep_key0),
1942 "wep_key1", wep_key1, sizeof(wep_key1),
1943 "wep_key2", wep_key2, sizeof(wep_key2),
1944 "wep_key3", wep_key3, sizeof(wep_key3)))
1945 {
1946 c->wpa_version = 0;
1947
1948 if (wpa_key_mgmt[0])
1949 {
1950 for (p = strtok(wpa_key_mgmt, " \t"); p != NULL; p = strtok(NULL, " \t"))
1951 {
1952 if (!strncmp(p, "WPA-", 4))
1953 p += 4;
1954
1955 if (!strncmp(p, "FT-", 3))
1956 p += 3;
1957
1958 parse_wpa_suites(p, atoi(wpa), &c->wpa_version, &c->auth_suites);
1959 }
1960
1961 c->enabled = c->wpa_version ? 1 : 0;
1962 }
1963
1964 if (wpa_pairwise[0])
1965 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1966
1967 if (auth_algs[0])
1968 {
1969 switch (atoi(auth_algs))
1970 {
1971 case 1:
1972 c->auth_algs |= IWINFO_AUTH_OPEN;
1973 break;
1974
1975 case 2:
1976 c->auth_algs |= IWINFO_AUTH_SHARED;
1977 break;
1978
1979 case 3:
1980 c->auth_algs |= IWINFO_AUTH_OPEN;
1981 c->auth_algs |= IWINFO_AUTH_SHARED;
1982 break;
1983 }
1984
1985 c->pair_ciphers |= nl80211_check_wepkey(wep_key0);
1986 c->pair_ciphers |= nl80211_check_wepkey(wep_key1);
1987 c->pair_ciphers |= nl80211_check_wepkey(wep_key2);
1988 c->pair_ciphers |= nl80211_check_wepkey(wep_key3);
1989
1990 c->enabled = (c->auth_algs && c->pair_ciphers) ? 1 : 0;
1991 }
1992
1993 c->group_ciphers = c->pair_ciphers;
1994
1995 return 0;
1996 }
1997
1998 /* Ad-Hoc or Mesh interfaces without wpa_supplicant are open */
1999 else if (!nl80211_get_mode(ifname, &opmode) &&
2000 (opmode == IWINFO_OPMODE_ADHOC ||
2001 opmode == IWINFO_OPMODE_MESHPOINT))
2002 {
2003 c->enabled = 0;
2004
2005 return 0;
2006 }
2007
2008
2009 return -1;
2010 }
2011
2012 static int nl80211_get_phyname(const char *ifname, char *buf)
2013 {
2014 const char *name;
2015
2016 name = nl80211_ifname2phy(ifname);
2017
2018 if (name)
2019 {
2020 strcpy(buf, name);
2021 return 0;
2022 }
2023 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
2024 {
2025 name = nl80211_ifname2phy(name);
2026
2027 if (name)
2028 {
2029 strcpy(buf, ifname);
2030 return 0;
2031 }
2032 }
2033
2034 return -1;
2035 }
2036
2037
2038 static void nl80211_parse_rateinfo(struct nlattr **ri,
2039 struct iwinfo_rate_entry *re)
2040 {
2041 if (ri[NL80211_RATE_INFO_BITRATE32])
2042 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100;
2043 else if (ri[NL80211_RATE_INFO_BITRATE])
2044 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100;
2045
2046 if (ri[NL80211_RATE_INFO_HE_MCS])
2047 {
2048 re->is_he = 1;
2049 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_HE_MCS]);
2050
2051 if (ri[NL80211_RATE_INFO_HE_NSS])
2052 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_HE_NSS]);
2053 if (ri[NL80211_RATE_INFO_HE_GI])
2054 re->he_gi = nla_get_u8(ri[NL80211_RATE_INFO_HE_GI]);
2055 if (ri[NL80211_RATE_INFO_HE_DCM])
2056 re->he_dcm = nla_get_u8(ri[NL80211_RATE_INFO_HE_DCM]);
2057 }
2058 else if (ri[NL80211_RATE_INFO_VHT_MCS])
2059 {
2060 re->is_vht = 1;
2061 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]);
2062
2063 if (ri[NL80211_RATE_INFO_VHT_NSS])
2064 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]);
2065 }
2066 else if (ri[NL80211_RATE_INFO_MCS])
2067 {
2068 re->is_ht = 1;
2069 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]);
2070 }
2071
2072 if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH])
2073 re->mhz = 5;
2074 else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH])
2075 re->mhz = 10;
2076 else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH])
2077 re->mhz = 40;
2078 else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH])
2079 re->mhz = 80;
2080 else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] ||
2081 ri[NL80211_RATE_INFO_160_MHZ_WIDTH])
2082 re->mhz = 160;
2083 else
2084 re->mhz = 20;
2085
2086 if (ri[NL80211_RATE_INFO_SHORT_GI])
2087 re->is_short_gi = 1;
2088
2089 re->is_40mhz = (re->mhz == 40);
2090 }
2091
2092 static int nl80211_get_survey_cb(struct nl_msg *msg, void *arg)
2093 {
2094 struct nl80211_array_buf *arr = arg;
2095 struct iwinfo_survey_entry *e = arr->buf;
2096 struct nlattr **attr = nl80211_parse(msg);
2097 struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
2098 int rc;
2099
2100 static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
2101 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
2102 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
2103 [NL80211_SURVEY_INFO_TIME] = { .type = NLA_U64 },
2104 [NL80211_SURVEY_INFO_TIME_BUSY] = { .type = NLA_U64 },
2105 [NL80211_SURVEY_INFO_TIME_EXT_BUSY] = { .type = NLA_U64 },
2106 [NL80211_SURVEY_INFO_TIME_RX] = { .type = NLA_U64 },
2107 [NL80211_SURVEY_INFO_TIME_TX] = { .type = NLA_U64 },
2108 };
2109
2110 rc = nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
2111 attr[NL80211_ATTR_SURVEY_INFO],
2112 survey_policy);
2113 if (rc)
2114 return NL_SKIP;
2115
2116 /* advance to end of array */
2117 e += arr->count;
2118 memset(e, 0, sizeof(*e));
2119
2120 if (sinfo[NL80211_SURVEY_INFO_FREQUENCY])
2121 e->mhz = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]);
2122
2123 if (sinfo[NL80211_SURVEY_INFO_NOISE])
2124 e->noise = nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
2125
2126 if (sinfo[NL80211_SURVEY_INFO_TIME])
2127 e->active_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME]);
2128
2129 if (sinfo[NL80211_SURVEY_INFO_TIME_BUSY])
2130 e->busy_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_BUSY]);
2131
2132 if (sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY])
2133 e->busy_time_ext = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]);
2134
2135 if (sinfo[NL80211_SURVEY_INFO_TIME_RX])
2136 e->rxtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_RX]);
2137
2138 if (sinfo[NL80211_SURVEY_INFO_TIME_TX])
2139 e->txtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_TX]);
2140
2141 arr->count++;
2142 return NL_SKIP;
2143 }
2144
2145
2146 static void plink_state_to_str(char *dst, unsigned state)
2147 {
2148 switch (state) {
2149 case NL80211_PLINK_LISTEN:
2150 strcpy(dst, "LISTEN");
2151 break;
2152 case NL80211_PLINK_OPN_SNT:
2153 strcpy(dst, "OPN_SNT");
2154 break;
2155 case NL80211_PLINK_OPN_RCVD:
2156 strcpy(dst, "OPN_RCVD");
2157 break;
2158 case NL80211_PLINK_CNF_RCVD:
2159 strcpy(dst, "CNF_RCVD");
2160 break;
2161 case NL80211_PLINK_ESTAB:
2162 strcpy(dst, "ESTAB");
2163 break;
2164 case NL80211_PLINK_HOLDING:
2165 strcpy(dst, "HOLDING");
2166 break;
2167 case NL80211_PLINK_BLOCKED:
2168 strcpy(dst, "BLOCKED");
2169 break;
2170 default:
2171 strcpy(dst, "UNKNOWN");
2172 break;
2173 }
2174 }
2175
2176 static void power_mode_to_str(char *dst, struct nlattr *a)
2177 {
2178 enum nl80211_mesh_power_mode pm = nla_get_u32(a);
2179
2180 switch (pm) {
2181 case NL80211_MESH_POWER_ACTIVE:
2182 strcpy(dst, "ACTIVE");
2183 break;
2184 case NL80211_MESH_POWER_LIGHT_SLEEP:
2185 strcpy(dst, "LIGHT SLEEP");
2186 break;
2187 case NL80211_MESH_POWER_DEEP_SLEEP:
2188 strcpy(dst, "DEEP SLEEP");
2189 break;
2190 default:
2191 strcpy(dst, "UNKNOWN");
2192 break;
2193 }
2194 }
2195
2196 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
2197 {
2198 struct nl80211_array_buf *arr = arg;
2199 struct iwinfo_assoclist_entry *e = arr->buf;
2200 struct nlattr **attr = nl80211_parse(msg);
2201 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
2202 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
2203 struct nl80211_sta_flag_update *sta_flags;
2204
2205 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
2206 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
2207 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
2208 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
2209 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
2210 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
2211 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
2212 [NL80211_STA_INFO_SIGNAL_AVG] = { .type = NLA_U8 },
2213 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
2214 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
2215 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 },
2216 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
2217 [NL80211_STA_INFO_CONNECTED_TIME]= { .type = NLA_U32 },
2218 [NL80211_STA_INFO_RX_DROP_MISC] = { .type = NLA_U64 },
2219 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 },
2220 [NL80211_STA_INFO_STA_FLAGS] =
2221 { .minlen = sizeof(struct nl80211_sta_flag_update) },
2222 [NL80211_STA_INFO_EXPECTED_THROUGHPUT] = { .type = NLA_U32 },
2223 /* mesh */
2224 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
2225 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
2226 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
2227 [NL80211_STA_INFO_LOCAL_PM] = { .type = NLA_U32 },
2228 [NL80211_STA_INFO_PEER_PM] = { .type = NLA_U32 },
2229 [NL80211_STA_INFO_NONPEER_PM] = { .type = NLA_U32 },
2230 };
2231
2232 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
2233 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
2234 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
2235 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
2236 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
2237 };
2238
2239 /* advance to end of array */
2240 e += arr->count;
2241 memset(e, 0, sizeof(*e));
2242
2243 if (attr[NL80211_ATTR_MAC])
2244 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
2245
2246 if (attr[NL80211_ATTR_STA_INFO] &&
2247 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
2248 attr[NL80211_ATTR_STA_INFO], stats_policy))
2249 {
2250 if (sinfo[NL80211_STA_INFO_SIGNAL])
2251 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
2252
2253 if (sinfo[NL80211_STA_INFO_SIGNAL_AVG])
2254 e->signal_avg = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]);
2255
2256 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
2257 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
2258
2259 if (sinfo[NL80211_STA_INFO_CONNECTED_TIME])
2260 e->connected_time = nla_get_u32(sinfo[NL80211_STA_INFO_CONNECTED_TIME]);
2261
2262 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
2263 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
2264
2265 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
2266 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
2267
2268 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
2269 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
2270 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
2271 nl80211_parse_rateinfo(rinfo, &e->rx_rate);
2272
2273 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
2274 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
2275 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
2276 nl80211_parse_rateinfo(rinfo, &e->tx_rate);
2277
2278 if (sinfo[NL80211_STA_INFO_RX_BYTES])
2279 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
2280
2281 if (sinfo[NL80211_STA_INFO_TX_BYTES])
2282 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
2283
2284 if (sinfo[NL80211_STA_INFO_TX_RETRIES])
2285 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
2286
2287 if (sinfo[NL80211_STA_INFO_TX_FAILED])
2288 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
2289
2290 if (sinfo[NL80211_STA_INFO_T_OFFSET])
2291 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]);
2292
2293 if (sinfo[NL80211_STA_INFO_RX_DROP_MISC])
2294 e->rx_drop_misc = nla_get_u64(sinfo[NL80211_STA_INFO_RX_DROP_MISC]);
2295
2296 if (sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT])
2297 e->thr = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]);
2298
2299 /* mesh */
2300 if (sinfo[NL80211_STA_INFO_LLID])
2301 e->llid = nla_get_u16(sinfo[NL80211_STA_INFO_LLID]);
2302
2303 if (sinfo[NL80211_STA_INFO_PLID])
2304 e->plid = nla_get_u16(sinfo[NL80211_STA_INFO_PLID]);
2305
2306 if (sinfo[NL80211_STA_INFO_PLINK_STATE])
2307 plink_state_to_str(e->plink_state,
2308 nla_get_u8(sinfo[NL80211_STA_INFO_PLINK_STATE]));
2309
2310 if (sinfo[NL80211_STA_INFO_LOCAL_PM])
2311 power_mode_to_str(e->local_ps, sinfo[NL80211_STA_INFO_LOCAL_PM]);
2312 if (sinfo[NL80211_STA_INFO_PEER_PM])
2313 power_mode_to_str(e->peer_ps, sinfo[NL80211_STA_INFO_PEER_PM]);
2314 if (sinfo[NL80211_STA_INFO_NONPEER_PM])
2315 power_mode_to_str(e->nonpeer_ps, sinfo[NL80211_STA_INFO_NONPEER_PM]);
2316
2317 /* Station flags */
2318 if (sinfo[NL80211_STA_INFO_STA_FLAGS])
2319 {
2320 sta_flags = (struct nl80211_sta_flag_update *)
2321 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
2322
2323 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
2324 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
2325 e->is_authorized = 1;
2326
2327 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
2328 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
2329 e->is_authenticated = 1;
2330
2331 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
2332 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
2333 e->is_preamble_short = 1;
2334
2335 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
2336 sta_flags->set & BIT(NL80211_STA_FLAG_WME))
2337 e->is_wme = 1;
2338
2339 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
2340 sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
2341 e->is_mfp = 1;
2342
2343 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
2344 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2345 e->is_tdls = 1;
2346 }
2347 }
2348
2349 e->noise = 0; /* filled in by caller */
2350 arr->count++;
2351
2352 return NL_SKIP;
2353 }
2354
2355 static int nl80211_get_survey(const char *ifname, char *buf, int *len)
2356 {
2357 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2358 int rc;
2359
2360 rc = nl80211_request(ifname, NL80211_CMD_GET_SURVEY,
2361 NLM_F_DUMP, nl80211_get_survey_cb, &arr);
2362 if (!rc)
2363 *len = (arr.count * sizeof(struct iwinfo_survey_entry));
2364 else
2365 *len = 0;
2366
2367 return 0;
2368 }
2369
2370 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
2371 {
2372 DIR *d;
2373 int i, noise = 0;
2374 struct dirent *de;
2375 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2376 struct iwinfo_assoclist_entry *e;
2377
2378 if ((d = opendir("/sys/class/net")) != NULL)
2379 {
2380 while ((de = readdir(d)) != NULL)
2381 {
2382 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
2383 (!de->d_name[strlen(ifname)] ||
2384 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
2385 {
2386 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
2387 NLM_F_DUMP, nl80211_get_assoclist_cb, &arr);
2388 }
2389 }
2390
2391 closedir(d);
2392
2393 if (!nl80211_get_noise(ifname, &noise))
2394 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
2395 e->noise = noise;
2396
2397 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
2398 return 0;
2399 }
2400
2401 return -1;
2402 }
2403
2404 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
2405 {
2406 int *dbm_max = arg;
2407 int ch_cur, ch_cmp, bands_remain, freqs_remain;
2408
2409 struct nlattr **attr = nl80211_parse(msg);
2410 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2411 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2412 struct nlattr *band, *freq;
2413
2414 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2415 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2416 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2417 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2418 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2419 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2420 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2421 };
2422
2423 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
2424 *dbm_max = -1;
2425
2426 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2427 {
2428 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
2429 nla_len(band), NULL);
2430
2431 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2432 {
2433 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2434 nla_data(freq), nla_len(freq), freq_policy);
2435
2436 ch_cmp = nl80211_freq2channel(nla_get_u32(
2437 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
2438
2439 if ((!ch_cur || (ch_cmp == ch_cur)) &&
2440 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
2441 {
2442 *dbm_max = (int)(0.01 * nla_get_u32(
2443 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
2444
2445 break;
2446 }
2447 }
2448 }
2449
2450 return NL_SKIP;
2451 }
2452
2453 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
2454 {
2455 int err, ch_cur;
2456 int dbm_max = -1, dbm_cur, dbm_cnt;
2457 struct iwinfo_txpwrlist_entry entry;
2458
2459 if (nl80211_get_channel(ifname, &ch_cur))
2460 ch_cur = 0;
2461
2462 /* initialize the value pointer with channel for callback */
2463 dbm_max = ch_cur;
2464
2465 err = nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2466 nl80211_get_txpwrlist_cb, &dbm_max);
2467
2468 if (!err)
2469 {
2470 for (dbm_cur = 0, dbm_cnt = 0;
2471 dbm_cur < dbm_max;
2472 dbm_cur++, dbm_cnt++)
2473 {
2474 entry.dbm = dbm_cur;
2475 entry.mw = iwinfo_dbm2mw(dbm_cur);
2476
2477 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2478 }
2479
2480 entry.dbm = dbm_max;
2481 entry.mw = iwinfo_dbm2mw(dbm_max);
2482
2483 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2484 dbm_cnt++;
2485
2486 *len = dbm_cnt * sizeof(entry);
2487 return 0;
2488 }
2489
2490 return -1;
2491 }
2492
2493 static void nl80211_get_scancrypto(char *spec, struct iwinfo_crypto_entry *c)
2494 {
2495 int wpa_version = 0;
2496 char *p, *q, *proto, *suites;
2497
2498 c->enabled = 0;
2499
2500 for (p = strtok_r(spec, "[]", &q); p; p = strtok_r(NULL, "[]", &q)) {
2501 if (!strcmp(p, "WEP")) {
2502 c->enabled = 1;
2503 c->auth_suites = IWINFO_KMGMT_NONE;
2504 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2505 c->pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2506 break;
2507 }
2508
2509 proto = strtok(p, "-");
2510 suites = strtok(NULL, "]");
2511
2512 if (!proto || !suites)
2513 continue;
2514
2515 if (!strcmp(proto, "WPA2") || !strcmp(proto, "RSN"))
2516 wpa_version = 2;
2517 else if (!strcmp(proto, "WPA"))
2518 wpa_version = 1;
2519 else
2520 continue;
2521
2522 c->enabled = 1;
2523
2524 parse_wpa_suites(suites, wpa_version, &c->wpa_version, &c->auth_suites);
2525 parse_wpa_ciphers(suites, &c->pair_ciphers);
2526 }
2527 }
2528
2529
2530 struct nl80211_scanlist {
2531 struct iwinfo_scanlist_entry *e;
2532 int len;
2533 };
2534
2535
2536 static void nl80211_get_scanlist_ie(struct nlattr **bss,
2537 struct iwinfo_scanlist_entry *e)
2538 {
2539 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2540 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2541 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
2542 int len;
2543
2544 while (ielen >= 2 && ielen >= ie[1])
2545 {
2546 switch (ie[0])
2547 {
2548 case 0: /* SSID */
2549 case 114: /* Mesh ID */
2550 if (e->ssid[0] == 0) {
2551 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
2552 memcpy(e->ssid, ie + 2, len);
2553 e->ssid[len] = 0;
2554 }
2555 break;
2556
2557 case 48: /* RSN */
2558 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
2559 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
2560 break;
2561
2562 case 221: /* Vendor */
2563 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
2564 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
2565 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
2566 break;
2567 case 61: /* HT operation */
2568 if (ie[1] >= 3) {
2569 e->ht_chan_info.primary_chan = ie[2];
2570 e->ht_chan_info.secondary_chan_off = ie[3] & 0x3;
2571 e->ht_chan_info.chan_width = (ie[4] & 0x4)>>2;
2572 }
2573 break;
2574 case 192: /* VHT operation */
2575 if (ie[1] >= 3) {
2576 e->vht_chan_info.chan_width = ie[2];
2577 e->vht_chan_info.center_chan_1 = ie[3];
2578 e->vht_chan_info.center_chan_2 = ie[4];
2579 }
2580 break;
2581 }
2582
2583 ielen -= ie[1] + 2;
2584 ie += ie[1] + 2;
2585 }
2586 }
2587
2588 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
2589 {
2590 int8_t rssi;
2591 uint16_t caps;
2592
2593 struct nl80211_scanlist *sl = arg;
2594 struct nlattr **tb = nl80211_parse(msg);
2595 struct nlattr *bss[NL80211_BSS_MAX + 1];
2596
2597 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2598 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2599 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2600 [NL80211_BSS_BSSID] = { 0 },
2601 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2602 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2603 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
2604 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2605 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2606 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2607 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2608 [NL80211_BSS_BEACON_IES] = { 0 },
2609 };
2610
2611 if (!tb[NL80211_ATTR_BSS] ||
2612 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2613 bss_policy) ||
2614 !bss[NL80211_BSS_BSSID])
2615 {
2616 return NL_SKIP;
2617 }
2618
2619 if (bss[NL80211_BSS_CAPABILITY])
2620 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2621 else
2622 caps = 0;
2623
2624 memset(sl->e, 0, sizeof(*sl->e));
2625 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
2626
2627 if (caps & (1<<1))
2628 sl->e->mode = IWINFO_OPMODE_ADHOC;
2629 else if (caps & (1<<0))
2630 sl->e->mode = IWINFO_OPMODE_MASTER;
2631 else
2632 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
2633
2634 if (caps & (1<<4))
2635 sl->e->crypto.enabled = 1;
2636
2637 if (bss[NL80211_BSS_FREQUENCY])
2638 {
2639 sl->e->mhz = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
2640 sl->e->band = nl80211_freq2band(sl->e->mhz);
2641 sl->e->channel = nl80211_freq2channel(sl->e->mhz);
2642 }
2643
2644 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
2645 nl80211_get_scanlist_ie(bss, sl->e);
2646
2647 if (bss[NL80211_BSS_SIGNAL_MBM])
2648 {
2649 sl->e->signal =
2650 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
2651
2652 rssi = sl->e->signal - 0x100;
2653
2654 if (rssi < -110)
2655 rssi = -110;
2656 else if (rssi > -40)
2657 rssi = -40;
2658
2659 sl->e->quality = (rssi + 110);
2660 sl->e->quality_max = 70;
2661 }
2662
2663 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
2664 {
2665 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2666 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2667 }
2668
2669 sl->e++;
2670 sl->len++;
2671
2672 return NL_SKIP;
2673 }
2674
2675 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
2676 {
2677 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
2678
2679 if (nl80211_request(ifname, NL80211_CMD_TRIGGER_SCAN, 0, NULL, NULL))
2680 goto out;
2681
2682 if (nl80211_wait("nl80211", "scan",
2683 NL80211_CMD_NEW_SCAN_RESULTS, NL80211_CMD_SCAN_ABORTED))
2684 goto out;
2685
2686 if (nl80211_request(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
2687 nl80211_get_scanlist_cb, &sl))
2688 goto out;
2689
2690 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
2691 return 0;
2692
2693 out:
2694 *len = 0;
2695 return -1;
2696 }
2697
2698 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
2699 {
2700 #define hex(x) \
2701 (((x) >= 'a') ? ((x) - 'a' + 10) : \
2702 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0')))
2703
2704 int len = 0;
2705
2706 while (*in)
2707 {
2708 if (len + 1 >= outlen)
2709 break;
2710
2711 switch (*in)
2712 {
2713 case '\\':
2714 in++;
2715 switch (*in)
2716 {
2717 case 'n':
2718 out[len++] = '\n'; in++;
2719 break;
2720
2721 case 'r':
2722 out[len++] = '\r'; in++;
2723 break;
2724
2725 case 't':
2726 out[len++] = '\t'; in++;
2727 break;
2728
2729 case 'e':
2730 out[len++] = '\033'; in++;
2731 break;
2732
2733 case 'x':
2734 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
2735 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
2736 in += 3;
2737 break;
2738
2739 default:
2740 out[len++] = *in++;
2741 break;
2742 }
2743 break;
2744
2745 default:
2746 out[len++] = *in++;
2747 break;
2748 }
2749 }
2750
2751 if (outlen > len)
2752 out[len] = '\0';
2753
2754 return len;
2755 }
2756
2757 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len)
2758 {
2759 int sock, qmax, rssi, tries, count = -1, ready = 0;
2760 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096];
2761 struct sockaddr_un local = { 0 };
2762 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
2763
2764 sock = nl80211_wpactl_connect(ifname, &local);
2765
2766 if (sock < 0)
2767 return sock;
2768
2769 send(sock, "ATTACH", 6, 0);
2770 send(sock, "SCAN", 4, 0);
2771
2772 /*
2773 * wait for scan results:
2774 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan
2775 * 72 channels at most. We'll also receive two "OK" messages acknowledging
2776 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra
2777 * time to process the results, so try 72 + 2 + 1 times.
2778 */
2779 for (tries = 0; tries < 75; tries++)
2780 {
2781 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0)
2782 continue;
2783
2784 /* got an event notification */
2785 if (reply[0] == '<')
2786 {
2787 /* scan results are ready */
2788 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS"))
2789 {
2790 /* send "SCAN_RESULTS" command */
2791 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12);
2792 break;
2793 }
2794
2795 /* is another unrelated event, retry */
2796 tries--;
2797 }
2798
2799 /* scanning already in progress, keep awaiting results */
2800 else if (!strcmp(reply, "FAIL-BUSY\n"))
2801 {
2802 tries--;
2803 }
2804
2805 /* another failure, abort */
2806 else if (!strncmp(reply, "FAIL-", 5))
2807 {
2808 break;
2809 }
2810 }
2811
2812 /* receive and parse scan results if the wait above didn't time out */
2813 while (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
2814 {
2815 /* received an event notification, receive again */
2816 if (reply[0] == '<')
2817 continue;
2818
2819 nl80211_get_quality_max(ifname, &qmax);
2820
2821 for (line = strtok_r(reply, "\n", &pos);
2822 line != NULL;
2823 line = strtok_r(NULL, "\n", &pos))
2824 {
2825 /* skip header line */
2826 if (count < 0)
2827 {
2828 count++;
2829 continue;
2830 }
2831
2832 bssid = strtok(line, "\t");
2833 freq = strtok(NULL, "\t");
2834 signal = strtok(NULL, "\t");
2835 flags = strtok(NULL, "\t");
2836 ssid = strtok(NULL, "\n");
2837
2838 if (!bssid || !freq || !signal || !flags)
2839 continue;
2840
2841 /* BSSID */
2842 e->mac[0] = strtol(&bssid[0], NULL, 16);
2843 e->mac[1] = strtol(&bssid[3], NULL, 16);
2844 e->mac[2] = strtol(&bssid[6], NULL, 16);
2845 e->mac[3] = strtol(&bssid[9], NULL, 16);
2846 e->mac[4] = strtol(&bssid[12], NULL, 16);
2847 e->mac[5] = strtol(&bssid[15], NULL, 16);
2848
2849 /* SSID */
2850 if (ssid)
2851 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2852 else
2853 e->ssid[0] = 0;
2854
2855 /* Mode */
2856 if (strstr(flags, "[MESH]"))
2857 e->mode = IWINFO_OPMODE_MESHPOINT;
2858 else if (strstr(flags, "[IBSS]"))
2859 e->mode = IWINFO_OPMODE_ADHOC;
2860 else
2861 e->mode = IWINFO_OPMODE_MASTER;
2862
2863 /* Channel */
2864 e->mhz = atoi(freq);
2865 e->band = nl80211_freq2band(e->mhz);
2866 e->channel = nl80211_freq2channel(e->mhz);
2867
2868 /* Signal */
2869 rssi = atoi(signal);
2870 e->signal = rssi;
2871
2872 /* Quality */
2873 if (rssi < 0)
2874 {
2875 /* The cfg80211 wext compat layer assumes a signal range
2876 * of -110 dBm to -40 dBm, the quality value is derived
2877 * by adding 110 to the signal level */
2878 if (rssi < -110)
2879 rssi = -110;
2880 else if (rssi > -40)
2881 rssi = -40;
2882
2883 e->quality = (rssi + 110);
2884 }
2885 else
2886 {
2887 e->quality = rssi;
2888 }
2889
2890 /* Max. Quality */
2891 e->quality_max = qmax;
2892
2893 /* Crypto */
2894 nl80211_get_scancrypto(flags, &e->crypto);
2895
2896 count++;
2897 e++;
2898 }
2899
2900 *len = count * sizeof(struct iwinfo_scanlist_entry);
2901 break;
2902 }
2903
2904 close(sock);
2905 unlink(local.sun_path);
2906
2907 return (count >= 0) ? 0 : -1;
2908 }
2909
2910 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
2911 {
2912 char *res;
2913 int rv, mode;
2914
2915 *len = 0;
2916
2917 /* Got a radioX pseudo interface, find some interface on it or create one */
2918 if (!strncmp(ifname, "radio", 5))
2919 {
2920 /* Reuse existing interface */
2921 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2922 {
2923 return nl80211_get_scanlist(res, buf, len);
2924 }
2925
2926 /* Need to spawn a temporary iface for scanning */
2927 else if ((res = nl80211_ifadd(ifname)) != NULL)
2928 {
2929 rv = nl80211_get_scanlist(res, buf, len);
2930 nl80211_ifdel(res);
2931 return rv;
2932 }
2933 }
2934
2935 /* WPA supplicant */
2936 if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
2937 {
2938 return 0;
2939 }
2940
2941 /* station / ad-hoc / monitor scan */
2942 else if (!nl80211_get_mode(ifname, &mode) &&
2943 (mode == IWINFO_OPMODE_ADHOC ||
2944 mode == IWINFO_OPMODE_MASTER ||
2945 mode == IWINFO_OPMODE_CLIENT ||
2946 mode == IWINFO_OPMODE_MONITOR) &&
2947 iwinfo_ifup(ifname))
2948 {
2949 return nl80211_get_scanlist_nl(ifname, buf, len);
2950 }
2951
2952 /* AP scan */
2953 else
2954 {
2955 /* Got a temp interface, don't create yet another one */
2956 if (!strncmp(ifname, "tmp.", 4))
2957 {
2958 if (!iwinfo_ifup(ifname))
2959 return -1;
2960
2961 rv = nl80211_get_scanlist_nl(ifname, buf, len);
2962 iwinfo_ifdown(ifname);
2963 return rv;
2964 }
2965
2966 /* Spawn a new scan interface */
2967 else
2968 {
2969 if (!(res = nl80211_ifadd(ifname)))
2970 return -1;
2971
2972 iwinfo_ifmac(res);
2973
2974 /* if we can take the new interface up, the driver supports an
2975 * additional interface and there's no need to tear down the ap */
2976 if (iwinfo_ifup(res))
2977 {
2978 rv = nl80211_get_scanlist_nl(res, buf, len);
2979 iwinfo_ifdown(res);
2980 }
2981
2982 /* driver cannot create secondary interface, take down ap
2983 * during scan */
2984 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2985 {
2986 rv = nl80211_get_scanlist_nl(res, buf, len);
2987 iwinfo_ifdown(res);
2988 iwinfo_ifup(ifname);
2989 nl80211_hostapd_hup(ifname);
2990 }
2991 else
2992 rv = -1;
2993
2994 nl80211_ifdel(res);
2995 return rv;
2996 }
2997 }
2998
2999 return -1;
3000 }
3001
3002 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
3003 {
3004 int bands_remain, freqs_remain;
3005
3006 struct nl80211_array_buf *arr = arg;
3007 struct iwinfo_freqlist_entry *e;
3008
3009 struct nlattr **attr = nl80211_parse(msg);
3010 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
3011 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
3012 struct nlattr *band, *freq;
3013
3014 e = arr->buf;
3015 e += arr->count;
3016
3017 if (attr[NL80211_ATTR_WIPHY_BANDS]) {
3018 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
3019 {
3020 nla_parse(bands, NL80211_BAND_ATTR_MAX,
3021 nla_data(band), nla_len(band), NULL);
3022
3023 if (bands[NL80211_BAND_ATTR_FREQS]) {
3024 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
3025 {
3026 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
3027 nla_data(freq), nla_len(freq), NULL);
3028
3029 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
3030 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
3031 continue;
3032
3033 e->band = nl80211_get_band(band->nla_type);
3034 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
3035 e->channel = nl80211_freq2channel(e->mhz);
3036
3037 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_MINUS])
3038 e->flags |= IWINFO_FREQ_NO_HT40MINUS;
3039 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_PLUS])
3040 e->flags |= IWINFO_FREQ_NO_HT40PLUS;
3041 if (freqs[NL80211_FREQUENCY_ATTR_NO_80MHZ])
3042 e->flags |= IWINFO_FREQ_NO_80MHZ;
3043 if (freqs[NL80211_FREQUENCY_ATTR_NO_160MHZ])
3044 e->flags |= IWINFO_FREQ_NO_160MHZ;
3045 if (freqs[NL80211_FREQUENCY_ATTR_NO_20MHZ])
3046 e->flags |= IWINFO_FREQ_NO_20MHZ;
3047 if (freqs[NL80211_FREQUENCY_ATTR_NO_10MHZ])
3048 e->flags |= IWINFO_FREQ_NO_10MHZ;
3049 if (freqs[NL80211_FREQUENCY_ATTR_NO_HE])
3050 e->flags |= IWINFO_FREQ_NO_HE;
3051 if (freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
3052 !freqs[NL80211_FREQUENCY_ATTR_RADAR])
3053 e->flags |= IWINFO_FREQ_NO_IR;
3054 if (freqs[NL80211_FREQUENCY_ATTR_INDOOR_ONLY])
3055 e->flags |= IWINFO_FREQ_INDOOR_ONLY;
3056
3057 /* keep backwards compatibility */
3058 e->restricted = (e->flags & IWINFO_FREQ_NO_IR) ? 1 : 0;
3059
3060 e++;
3061 arr->count++;
3062 }
3063 }
3064 }
3065 }
3066
3067 return NL_SKIP;
3068 }
3069
3070 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
3071 {
3072 struct nl80211_msg_conveyor *cv;
3073 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
3074 uint32_t features = nl80211_get_protocol_features(ifname);
3075 int flags;
3076
3077 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
3078 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
3079 if (!cv)
3080 goto out;
3081
3082 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
3083 if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr))
3084 goto out;
3085
3086 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
3087 return 0;
3088
3089 nla_put_failure:
3090 nl80211_free(cv);
3091 out:
3092 *len = 0;
3093 return -1;
3094 }
3095
3096 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
3097 {
3098 char *buf = arg;
3099 struct nlattr **attr = nl80211_parse(msg);
3100
3101 if (attr[NL80211_ATTR_REG_ALPHA2])
3102 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
3103 else
3104 buf[0] = 0;
3105
3106 return NL_SKIP;
3107 }
3108
3109 static int nl80211_get_country(const char *ifname, char *buf)
3110 {
3111 if (nl80211_request(ifname, NL80211_CMD_GET_REG, 0,
3112 nl80211_get_country_cb, buf))
3113 return -1;
3114
3115 return 0;
3116 }
3117
3118 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
3119 {
3120 int count;
3121 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
3122 const struct iwinfo_iso3166_label *l;
3123
3124 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
3125 {
3126 e->iso3166 = l->iso3166;
3127 e->ccode[0] = (l->iso3166 / 256);
3128 e->ccode[1] = (l->iso3166 % 256);
3129 e->ccode[2] = 0;
3130 }
3131
3132 *len = (count * sizeof(struct iwinfo_country_entry));
3133 return 0;
3134 }
3135
3136
3137 struct nl80211_modes
3138 {
3139 bool ok;
3140 uint32_t hw;
3141 uint32_t ht;
3142
3143 uint8_t bands;
3144
3145 uint16_t nl_ht;
3146 uint32_t nl_vht;
3147 uint16_t he_phy_cap[6];
3148 };
3149
3150 static void nl80211_eval_modelist(struct nl80211_modes *m)
3151 {
3152 /* Treat any nonzero capability as 11n */
3153 if (m->nl_ht > 0)
3154 {
3155 m->hw |= IWINFO_80211_N;
3156 m->ht |= IWINFO_HTMODE_HT20;
3157
3158 if (m->nl_ht & (1 << 1))
3159 m->ht |= IWINFO_HTMODE_HT40;
3160 }
3161
3162 if (m->he_phy_cap[0] != 0) {
3163 m->hw |= IWINFO_80211_AX;
3164 m->ht |= IWINFO_HTMODE_HE20;
3165
3166 if (m->he_phy_cap[0] & BIT(9))
3167 m->ht |= IWINFO_HTMODE_HE40;
3168 if (m->he_phy_cap[0] & BIT(10))
3169 m->ht |= IWINFO_HTMODE_HE40 | IWINFO_HTMODE_HE80;
3170 if (m->he_phy_cap[0] & BIT(11))
3171 m->ht |= IWINFO_HTMODE_HE160;
3172 if (m->he_phy_cap[0] & BIT(12))
3173 m->ht |= IWINFO_HTMODE_HE160 | IWINFO_HTMODE_HE80_80;
3174 }
3175
3176 if (m->bands & IWINFO_BAND_24)
3177 {
3178 m->hw |= IWINFO_80211_B;
3179 m->hw |= IWINFO_80211_G;
3180 }
3181
3182 if (m->bands & IWINFO_BAND_5)
3183 {
3184 /* Treat any nonzero capability as 11ac */
3185 if (m->nl_vht > 0)
3186 {
3187 m->hw |= IWINFO_80211_AC;
3188 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
3189
3190 switch ((m->nl_vht >> 2) & 3)
3191 {
3192 case 2:
3193 m->ht |= IWINFO_HTMODE_VHT80_80;
3194 /* fall through */
3195
3196 case 1:
3197 m->ht |= IWINFO_HTMODE_VHT160;
3198 }
3199 }
3200 else
3201 {
3202 m->hw |= IWINFO_80211_A;
3203 }
3204 }
3205
3206 if (m->bands & IWINFO_BAND_60)
3207 {
3208 m->hw |= IWINFO_80211_AD;
3209 }
3210
3211 }
3212
3213 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
3214 {
3215 struct nl80211_modes *m = arg;
3216 int bands_remain;
3217 struct nlattr **attr = nl80211_parse(msg);
3218 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
3219 struct nlattr *band;
3220
3221 if (attr[NL80211_ATTR_WIPHY_BANDS])
3222 {
3223 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
3224 {
3225 m->bands |= nl80211_get_band(band->nla_type);
3226
3227 nla_parse(bands, NL80211_BAND_ATTR_MAX,
3228 nla_data(band), nla_len(band), NULL);
3229
3230 if (bands[NL80211_BAND_ATTR_HT_CAPA])
3231 m->nl_ht = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
3232
3233 if (bands[NL80211_BAND_ATTR_VHT_CAPA])
3234 m->nl_vht = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
3235
3236 if (bands[NL80211_BAND_ATTR_IFTYPE_DATA]) {
3237 struct nlattr *tb[NL80211_BAND_IFTYPE_ATTR_MAX + 1];
3238 struct nlattr *nl_iftype;
3239 int rem_band;
3240 int len;
3241
3242 nla_for_each_nested(nl_iftype, bands[NL80211_BAND_ATTR_IFTYPE_DATA], rem_band) {
3243 nla_parse(tb, NL80211_BAND_IFTYPE_ATTR_MAX,
3244 nla_data(nl_iftype), nla_len(nl_iftype), NULL);
3245 if (tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]) {
3246 len = nla_len(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]);
3247
3248 if (len > sizeof(m->he_phy_cap) - 1)
3249 len = sizeof(m->he_phy_cap) - 1;
3250 memcpy(&((__u8 *)m->he_phy_cap)[1],
3251 nla_data(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]),
3252 len);
3253 }
3254 }
3255 }
3256 }
3257
3258 m->ok = 1;
3259 }
3260
3261 return NL_SKIP;
3262 }
3263
3264 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
3265 {
3266 struct nl80211_msg_conveyor *cv;
3267 struct nl80211_modes m = {};
3268 uint32_t features = nl80211_get_protocol_features(ifname);
3269 int flags;
3270
3271 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
3272 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
3273 if (!cv)
3274 goto out;
3275
3276 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
3277 if (nl80211_send(cv, nl80211_get_modelist_cb, &m))
3278 goto nla_put_failure;
3279
3280 nl80211_eval_modelist(&m);
3281
3282 *buf = m.hw;
3283
3284 return 0;
3285
3286 nla_put_failure:
3287 nl80211_free(cv);
3288 out:
3289 return -1;
3290 }
3291
3292 struct chan_info {
3293 int width;
3294 int mode;
3295 };
3296
3297 static int nl80211_get_htmode_cb(struct nl_msg *msg, void *arg)
3298 {
3299 struct nlattr **tb = nl80211_parse(msg);
3300 struct nlattr *cur;
3301 struct chan_info *chn = arg;
3302
3303 if ((cur = tb[NL80211_ATTR_CHANNEL_WIDTH]))
3304 chn->width = nla_get_u32(cur);
3305
3306 if ((cur = tb[NL80211_ATTR_BSS_HT_OPMODE]))
3307 chn->mode = nla_get_u32(cur);
3308
3309 return NL_SKIP;
3310 }
3311
3312 static int nl80211_get_htmode(const char *ifname, int *buf)
3313 {
3314 struct chan_info chn = { 0 };
3315 char *res, b[2] = { 0 };
3316 int err;
3317 bool he = false;
3318
3319 res = nl80211_phy2ifname(ifname);
3320 *buf = 0;
3321
3322 err = nl80211_request(res ? res : ifname,
3323 NL80211_CMD_GET_INTERFACE, 0,
3324 nl80211_get_htmode_cb, &chn);
3325 if (err)
3326 return -1;
3327
3328 if (nl80211_hostapd_query(res ? res : ifname, "ieee80211ax", b, sizeof(b)))
3329 he = b[0] == '1';
3330 else if (nl80211_wpactl_query(res ? res : ifname, "wifi_generation", b, sizeof(b)))
3331 he = b[0] == '6';
3332
3333 switch (chn.width) {
3334 case NL80211_CHAN_WIDTH_20:
3335 if (he)
3336 *buf = IWINFO_HTMODE_HE20;
3337 else if (chn.mode == -1)
3338 *buf = IWINFO_HTMODE_VHT20;
3339 else
3340 *buf = IWINFO_HTMODE_HT20;
3341 break;
3342 case NL80211_CHAN_WIDTH_40:
3343 if (he)
3344 *buf = IWINFO_HTMODE_HE40;
3345 else if (chn.mode == -1)
3346 *buf = IWINFO_HTMODE_VHT40;
3347 else
3348 *buf = IWINFO_HTMODE_HT40;
3349 break;
3350 case NL80211_CHAN_WIDTH_80:
3351 if (he)
3352 *buf = IWINFO_HTMODE_HE80;
3353 else
3354 *buf = IWINFO_HTMODE_VHT80;
3355 break;
3356 case NL80211_CHAN_WIDTH_80P80:
3357 if (he)
3358 *buf = IWINFO_HTMODE_HE80_80;
3359 else
3360 *buf = IWINFO_HTMODE_VHT80_80;
3361 break;
3362 case NL80211_CHAN_WIDTH_160:
3363 if (he)
3364 *buf = IWINFO_HTMODE_HE160;
3365 else
3366 *buf = IWINFO_HTMODE_VHT160;
3367 break;
3368 case NL80211_CHAN_WIDTH_5:
3369 case NL80211_CHAN_WIDTH_10:
3370 case NL80211_CHAN_WIDTH_20_NOHT:
3371 *buf = IWINFO_HTMODE_NOHT;
3372 break;
3373 default:
3374 return -1;
3375 }
3376
3377 return 0;
3378 }
3379
3380 static int nl80211_get_htmodelist(const char *ifname, int *buf)
3381 {
3382 struct nl80211_msg_conveyor *cv;
3383 struct nl80211_modes m = {};
3384 uint32_t features = nl80211_get_protocol_features(ifname);
3385 int flags;
3386
3387 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
3388 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
3389 if (!cv)
3390 goto out;
3391
3392 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
3393 if (nl80211_send(cv, nl80211_get_modelist_cb, &m))
3394 goto nla_put_failure;
3395
3396 nl80211_eval_modelist(&m);
3397
3398 *buf = m.ht;
3399
3400 return 0;
3401
3402 nla_put_failure:
3403 nl80211_free(cv);
3404 out:
3405 return -1;
3406 }
3407
3408
3409 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
3410 {
3411 struct nlattr **attr = nl80211_parse(msg);
3412 struct nlattr *comb;
3413 int *ret = arg;
3414 int comb_rem, limit_rem, mode_rem;
3415
3416 *ret = 0;
3417 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
3418 return NL_SKIP;
3419
3420 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
3421 {
3422 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
3423 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
3424 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
3425 };
3426 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1];
3427 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
3428 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
3429 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
3430 };
3431 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1];
3432 struct nlattr *limit;
3433
3434 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy);
3435
3436 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
3437 continue;
3438
3439 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
3440 {
3441 struct nlattr *mode;
3442
3443 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
3444
3445 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
3446 !tb_limit[NL80211_IFACE_LIMIT_MAX])
3447 continue;
3448
3449 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
3450 continue;
3451
3452 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
3453 if (nla_type(mode) == NL80211_IFTYPE_AP)
3454 *ret = 1;
3455 }
3456 }
3457 }
3458
3459 return NL_SKIP;
3460 }
3461
3462 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
3463 {
3464 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
3465 nl80211_get_ifcomb_cb, buf))
3466 return -1;
3467
3468 return 0;
3469 }
3470
3471 static int nl80211_hardware_id_from_fdt(struct iwinfo_hardware_id *id, const char *ifname)
3472 {
3473 char *phy, path[PATH_MAX];
3474
3475 /* Try to determine the phy name from the given interface */
3476 phy = nl80211_ifname2phy(ifname);
3477
3478 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/of_node/compatible",
3479 phy ? "ieee80211" : "net", phy ? phy : ifname);
3480
3481 if (nl80211_readstr(path, id->compatible, sizeof(id->compatible)) <= 0)
3482 return -1;
3483
3484 return 0;
3485 }
3486
3487
3488 static int nl80211_get_hardware_id(const char *ifname, char *buf)
3489 {
3490 struct iwinfo_hardware_id *id = (struct iwinfo_hardware_id *)buf;
3491 char *phy, num[8], path[PATH_MAX];
3492 int i;
3493
3494 struct { const char *path; uint16_t *dest; } lookup[] = {
3495 { "vendor", &id->vendor_id },
3496 { "device", &id->device_id },
3497 { "subsystem_vendor", &id->subsystem_vendor_id },
3498 { "subsystem_device", &id->subsystem_device_id },
3499 { "../idVendor", &id->subsystem_vendor_id },
3500 { "../idProduct", &id->subsystem_device_id }
3501 };
3502
3503 memset(id, 0, sizeof(*id));
3504
3505 /* Try to determine the phy name from the given interface */
3506 phy = nl80211_ifname2phy(ifname);
3507
3508 for (i = 0; i < ARRAY_SIZE(lookup); i++)
3509 {
3510 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/%s",
3511 phy ? "ieee80211" : "net",
3512 phy ? phy : ifname, lookup[i].path);
3513
3514 if (nl80211_readstr(path, num, sizeof(num)) > 0)
3515 *lookup[i].dest = strtoul(num, NULL, 16);
3516 }
3517
3518 /* Failed to obtain hardware PCI/USB IDs... */
3519 if (id->vendor_id == 0 && id->device_id == 0 &&
3520 id->subsystem_vendor_id == 0 && id->subsystem_device_id == 0)
3521 /* ... first fallback to FDT ... */
3522 if (nl80211_hardware_id_from_fdt(id, ifname) == -1)
3523 /* ... then board config */
3524 return iwinfo_hardware_id_from_mtd(id);
3525
3526 return 0;
3527 }
3528
3529 static const struct iwinfo_hardware_entry *
3530 nl80211_get_hardware_entry(const char *ifname)
3531 {
3532 struct iwinfo_hardware_id id;
3533
3534 if (nl80211_get_hardware_id(ifname, (char *)&id))
3535 return NULL;
3536
3537 return iwinfo_hardware(&id);
3538 }
3539
3540 static int nl80211_get_hardware_name(const char *ifname, char *buf)
3541 {
3542 const struct iwinfo_hardware_entry *hw;
3543
3544 if (!(hw = nl80211_get_hardware_entry(ifname)))
3545 sprintf(buf, "Generic MAC80211");
3546 else
3547 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
3548
3549 return 0;
3550 }
3551
3552 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
3553 {
3554 const struct iwinfo_hardware_entry *hw;
3555
3556 if (!(hw = nl80211_get_hardware_entry(ifname)))
3557 return -1;
3558
3559 *buf = hw->txpower_offset;
3560 return 0;
3561 }
3562
3563 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
3564 {
3565 const struct iwinfo_hardware_entry *hw;
3566
3567 if (!(hw = nl80211_get_hardware_entry(ifname)))
3568 return -1;
3569
3570 *buf = hw->frequency_offset;
3571 return 0;
3572 }
3573
3574 static int nl80211_lookup_phyname(const char *section, char *buf)
3575 {
3576 const char *name;
3577 int idx;
3578
3579 if (!strncmp(section, "path=", 5))
3580 idx = nl80211_phy_idx_from_path(section + 5);
3581 else if (!strncmp(section, "macaddr=", 8))
3582 idx = nl80211_phy_idx_from_macaddr(section + 8);
3583 else
3584 idx = nl80211_phy_idx_from_uci(section);
3585
3586 if (idx < 0)
3587 return -1;
3588
3589 name = nl80211_phyidx2name(idx);
3590 if (!name)
3591 return -1;
3592
3593 strcpy(buf, name);
3594 return 0;
3595 }
3596
3597 static int nl80211_phy_path(const char *phyname, const char **path)
3598 {
3599 if (strchr(phyname, '/'))
3600 return -1;
3601
3602 *path = nl80211_phy_path_str(phyname);
3603 if (!*path)
3604 return -1;
3605
3606 return 0;
3607 }
3608
3609 const struct iwinfo_ops nl80211_ops = {
3610 .name = "nl80211",
3611 .probe = nl80211_probe,
3612 .channel = nl80211_get_channel,
3613 .center_chan1 = nl80211_get_center_chan1,
3614 .center_chan2 = nl80211_get_center_chan2,
3615 .frequency = nl80211_get_frequency,
3616 .frequency_offset = nl80211_get_frequency_offset,
3617 .txpower = nl80211_get_txpower,
3618 .txpower_offset = nl80211_get_txpower_offset,
3619 .bitrate = nl80211_get_bitrate,
3620 .signal = nl80211_get_signal,
3621 .noise = nl80211_get_noise,
3622 .quality = nl80211_get_quality,
3623 .quality_max = nl80211_get_quality_max,
3624 .mbssid_support = nl80211_get_mbssid_support,
3625 .hwmodelist = nl80211_get_hwmodelist,
3626 .htmodelist = nl80211_get_htmodelist,
3627 .htmode = nl80211_get_htmode,
3628 .mode = nl80211_get_mode,
3629 .ssid = nl80211_get_ssid,
3630 .bssid = nl80211_get_bssid,
3631 .country = nl80211_get_country,
3632 .hardware_id = nl80211_get_hardware_id,
3633 .hardware_name = nl80211_get_hardware_name,
3634 .encryption = nl80211_get_encryption,
3635 .phyname = nl80211_get_phyname,
3636 .assoclist = nl80211_get_assoclist,
3637 .txpwrlist = nl80211_get_txpwrlist,
3638 .scanlist = nl80211_get_scanlist,
3639 .freqlist = nl80211_get_freqlist,
3640 .countrylist = nl80211_get_countrylist,
3641 .survey = nl80211_get_survey,
3642 .lookup_phy = nl80211_lookup_phyname,
3643 .phy_path = nl80211_phy_path,
3644 .close = nl80211_close
3645 };
Library for accessing wireless device drivers