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devices: add device id for Realtek RTL8188CU and RTL8188FTV
[project/iwinfo.git] / iwinfo_nl80211.c
1 /*
2 * iwinfo - Wireless Information Library - NL80211 Backend
3 *
4 * Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
5 *
6 * The iwinfo library is free software: you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
9 *
10 * The iwinfo library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 * See the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with the iwinfo library. If not, see http://www.gnu.org/licenses/.
17 *
18 * The signal handling code is derived from the official madwifi tools,
19 * wlanconfig.c in particular. The encryption property handling was
20 * inspired by the hostapd madwifi driver.
21 *
22 * Parts of this code are derived from the Linux iw utility.
23 */
24
25 #include <sys/stat.h>
26 #include <limits.h>
27 #include <glob.h>
28 #include <fnmatch.h>
29 #include <stdarg.h>
30 #include <stdlib.h>
31
32 #include "iwinfo_nl80211.h"
33
34 #define min(x, y) ((x) < (y)) ? (x) : (y)
35
36 #define BIT(x) (1ULL<<(x))
37
38 static struct nl80211_state *nls = NULL;
39
40 static void nl80211_close(void)
41 {
42 if (nls)
43 {
44 if (nls->nlctrl)
45 genl_family_put(nls->nlctrl);
46
47 if (nls->nl80211)
48 genl_family_put(nls->nl80211);
49
50 if (nls->nl_sock)
51 nl_socket_free(nls->nl_sock);
52
53 if (nls->nl_cache)
54 nl_cache_free(nls->nl_cache);
55
56 free(nls);
57 nls = NULL;
58 }
59 }
60
61 static int nl80211_init(void)
62 {
63 int err, fd;
64
65 if (!nls)
66 {
67 nls = malloc(sizeof(struct nl80211_state));
68 if (!nls) {
69 err = -ENOMEM;
70 goto err;
71 }
72
73 memset(nls, 0, sizeof(*nls));
74
75 nls->nl_sock = nl_socket_alloc();
76 if (!nls->nl_sock) {
77 err = -ENOMEM;
78 goto err;
79 }
80
81 if (genl_connect(nls->nl_sock)) {
82 err = -ENOLINK;
83 goto err;
84 }
85
86 fd = nl_socket_get_fd(nls->nl_sock);
87 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
88 err = -EINVAL;
89 goto err;
90 }
91
92 if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
93 err = -ENOMEM;
94 goto err;
95 }
96
97 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
98 if (!nls->nl80211) {
99 err = -ENOENT;
100 goto err;
101 }
102
103 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
104 if (!nls->nlctrl) {
105 err = -ENOENT;
106 goto err;
107 }
108 }
109
110 return 0;
111
112
113 err:
114 nl80211_close();
115 return err;
116 }
117
118 static int nl80211_readint(const char *path)
119 {
120 int fd;
121 int rv = -1;
122 char buffer[16];
123
124 if ((fd = open(path, O_RDONLY)) > -1)
125 {
126 if (read(fd, buffer, sizeof(buffer)) > 0)
127 rv = atoi(buffer);
128
129 close(fd);
130 }
131
132 return rv;
133 }
134
135 static int nl80211_readstr(const char *path, char *buffer, int length)
136 {
137 int fd;
138 int rv = -1;
139
140 if ((fd = open(path, O_RDONLY)) > -1)
141 {
142 if ((rv = read(fd, buffer, length - 1)) > 0)
143 {
144 if (buffer[rv - 1] == '\n')
145 rv--;
146
147 buffer[rv] = 0;
148 }
149
150 close(fd);
151 }
152
153 return rv;
154 }
155
156 static int nl80211_get_band(int nla_type)
157 {
158 switch (nla_type)
159 {
160 case NL80211_BAND_2GHZ:
161 return IWINFO_BAND_24;
162 case NL80211_BAND_5GHZ:
163 return IWINFO_BAND_5;
164 case NL80211_BAND_6GHZ:
165 return IWINFO_BAND_6;
166 case NL80211_BAND_60GHZ:
167 return IWINFO_BAND_60;
168 }
169
170 return 0;
171 }
172
173
174 static int nl80211_msg_error(struct sockaddr_nl *nla,
175 struct nlmsgerr *err, void *arg)
176 {
177 int *ret = arg;
178 *ret = err->error;
179 return NL_STOP;
180 }
181
182 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
183 {
184 int *ret = arg;
185 *ret = 0;
186 return NL_SKIP;
187 }
188
189 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
190 {
191 int *ret = arg;
192 *ret = 0;
193 return NL_STOP;
194 }
195
196 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
197 {
198 return NL_SKIP;
199 }
200
201 static void nl80211_free(struct nl80211_msg_conveyor *cv)
202 {
203 if (cv)
204 {
205 if (cv->cb)
206 nl_cb_put(cv->cb);
207
208 if (cv->msg)
209 nlmsg_free(cv->msg);
210
211 cv->cb = NULL;
212 cv->msg = NULL;
213 }
214 }
215
216 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
217 int cmd, int flags)
218 {
219 static struct nl80211_msg_conveyor cv;
220
221 struct nl_msg *req = NULL;
222 struct nl_cb *cb = NULL;
223
224 req = nlmsg_alloc();
225 if (!req)
226 goto err;
227
228 cb = nl_cb_alloc(NL_CB_DEFAULT);
229 if (!cb)
230 goto err;
231
232 genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
233
234 cv.msg = req;
235 cv.cb = cb;
236
237 return &cv;
238
239 err:
240 if (req)
241 nlmsg_free(req);
242
243 return NULL;
244 }
245
246 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
247 {
248 if (nl80211_init() < 0)
249 return NULL;
250
251 return nl80211_new(nls->nlctrl, cmd, flags);
252 }
253
254 static const char *nl80211_phy_path_str(const char *phyname)
255 {
256 static char path[PATH_MAX];
257 const char *prefix = "/sys/devices/";
258 int prefix_len = strlen(prefix);
259 int buf_len, offset;
260 struct dirent *e;
261 char buf[512], *link;
262 int phy_idx;
263 int seq = 0;
264 DIR *d;
265
266 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", phyname);
267 phy_idx = nl80211_readint(buf);
268 if (phy_idx < 0)
269 return NULL;
270
271 buf_len = snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/device", phyname);
272 link = realpath(buf, path);
273 if (!link)
274 return NULL;
275
276 if (strncmp(link, prefix, prefix_len) != 0)
277 return NULL;
278
279 link += prefix_len;
280
281 prefix = "platform/";
282 prefix_len = strlen(prefix);
283 if (!strncmp(link, prefix, prefix_len) && strstr(link, "/pci"))
284 link += prefix_len;
285
286 snprintf(buf + buf_len, sizeof(buf) - buf_len, "/ieee80211");
287 d = opendir(buf);
288 if (!d)
289 return link;
290
291 while ((e = readdir(d)) != NULL) {
292 int cur_idx;
293
294 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", e->d_name);
295 cur_idx = nl80211_readint(buf);
296 if (cur_idx < 0)
297 continue;
298
299 if (cur_idx >= phy_idx)
300 continue;
301
302 seq++;
303 }
304
305 closedir(d);
306
307 if (!seq)
308 return link;
309
310 offset = link - path + strlen(link);
311 snprintf(path + offset, sizeof(path) - offset, "+%d", seq);
312
313 return link;
314 }
315
316 static int nl80211_phy_idx_from_path(const char *path)
317 {
318 char buf[512];
319 struct dirent *e;
320 const char *cur_path;
321 int cur_path_len;
322 int path_len;
323 int idx = -1;
324 DIR *d;
325
326 if (!path)
327 return -1;
328
329 path_len = strlen(path);
330 if (!path_len)
331 return -1;
332
333 d = opendir("/sys/class/ieee80211");
334 if (!d)
335 return -1;
336
337 while ((e = readdir(d)) != NULL) {
338 cur_path = nl80211_phy_path_str(e->d_name);
339 if (!cur_path)
340 continue;
341
342 cur_path_len = strlen(cur_path);
343 if (cur_path_len < path_len)
344 continue;
345
346 if (strcmp(cur_path + cur_path_len - path_len, path) != 0)
347 continue;
348
349 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", e->d_name);
350 idx = nl80211_readint(buf);
351
352 if (idx >= 0)
353 break;
354 }
355
356 closedir(d);
357
358 return idx;
359 }
360
361 static int nl80211_phy_idx_from_macaddr(const char *opt)
362 {
363 char buf[128];
364 int i, idx = -1;
365 glob_t gl;
366
367 if (!opt)
368 return -1;
369
370 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/*");
371 if (glob(buf, 0, NULL, &gl))
372 return -1;
373
374 for (i = 0; i < gl.gl_pathc; i++)
375 {
376 snprintf(buf, sizeof(buf), "%s/macaddress", gl.gl_pathv[i]);
377 if (nl80211_readstr(buf, buf, sizeof(buf)) <= 0)
378 continue;
379
380 if (fnmatch(opt, buf, FNM_CASEFOLD))
381 continue;
382
383 snprintf(buf, sizeof(buf), "%s/index", gl.gl_pathv[i]);
384 if ((idx = nl80211_readint(buf)) > -1)
385 break;
386 }
387
388 globfree(&gl);
389
390 return idx;
391 }
392
393 static int nl80211_phy_idx_from_phy(const char *opt)
394 {
395 char buf[128];
396
397 if (!opt)
398 return -1;
399
400 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", opt);
401 return nl80211_readint(buf);
402 }
403
404 static int nl80211_phy_idx_from_uci(const char *name)
405 {
406 struct uci_section *s;
407 const char *opt;
408 int idx = -1;
409
410 s = iwinfo_uci_get_radio(name, "mac80211");
411 if (!s)
412 goto out;
413
414 opt = uci_lookup_option_string(uci_ctx, s, "path");
415 idx = nl80211_phy_idx_from_path(opt);
416 if (idx >= 0)
417 goto out;
418
419 opt = uci_lookup_option_string(uci_ctx, s, "macaddr");
420 idx = nl80211_phy_idx_from_macaddr(opt);
421 if (idx >= 0)
422 goto out;
423
424 opt = uci_lookup_option_string(uci_ctx, s, "phy");
425 idx = nl80211_phy_idx_from_phy(opt);
426
427 out:
428 iwinfo_uci_free();
429 return idx;
430 }
431
432 static bool nl80211_is_ifname(const char *name)
433 {
434 struct stat st;
435 char buffer[PATH_MAX];
436
437 snprintf(buffer, sizeof(buffer), "/sys/class/net/%s", name);
438 return !lstat(buffer, &st);
439 }
440
441 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
442 int cmd, int flags)
443 {
444 unsigned int ifidx = 0;
445 int phyidx = -1;
446 struct nl80211_msg_conveyor *cv;
447
448 if (ifname == NULL)
449 return NULL;
450
451 if (nl80211_init() < 0)
452 return NULL;
453
454 if (!strncmp(ifname, "mon.", 4))
455 ifidx = if_nametoindex(&ifname[4]);
456 else if (nl80211_is_ifname(ifname))
457 ifidx = if_nametoindex(ifname);
458 else
459 {
460 phyidx = nl80211_phy_idx_from_phy(ifname);
461 if (phyidx < 0)
462 phyidx = nl80211_phy_idx_from_uci(ifname);
463 }
464
465 /* Valid ifidx must be greater than 0 */
466 if ((ifidx <= 0) && (phyidx < 0))
467 return NULL;
468
469 cv = nl80211_new(nls->nl80211, cmd, flags);
470 if (!cv)
471 return NULL;
472
473 if (ifidx > 0)
474 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
475 else if (phyidx > -1)
476 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
477
478 return cv;
479
480 nla_put_failure:
481 nl80211_free(cv);
482 return NULL;
483 }
484
485 static int nl80211_send(struct nl80211_msg_conveyor *cv,
486 int (*cb_func)(struct nl_msg *, void *),
487 void *cb_arg)
488 {
489 static struct nl80211_msg_conveyor rcv;
490 int err;
491
492 if (cb_func)
493 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
494 else
495 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
496
497 err = nl_send_auto_complete(nls->nl_sock, cv->msg);
498
499 if (err < 0)
500 goto out;
501
502 err = 1;
503
504 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
505 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
506 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
507
508 while (err > 0)
509 nl_recvmsgs(nls->nl_sock, cv->cb);
510
511 out:
512 nl80211_free(cv);
513 return err;
514 }
515
516 static int nl80211_request(const char *ifname, int cmd, int flags,
517 int (*cb_func)(struct nl_msg *, void *),
518 void *cb_arg)
519 {
520 struct nl80211_msg_conveyor *cv;
521
522 cv = nl80211_msg(ifname, cmd, flags);
523
524 if (!cv)
525 return -ENOMEM;
526
527 return nl80211_send(cv, cb_func, cb_arg);
528 }
529
530 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
531 {
532 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
533 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
534
535 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
536 genlmsg_attrlen(gnlh, 0), NULL);
537
538 return attr;
539 }
540
541 static int nl80211_get_protocol_features_cb(struct nl_msg *msg, void *arg)
542 {
543 uint32_t *features = arg;
544 struct nlattr **attr = nl80211_parse(msg);
545
546 if (attr[NL80211_ATTR_PROTOCOL_FEATURES])
547 *features = nla_get_u32(attr[NL80211_ATTR_PROTOCOL_FEATURES]);
548
549 return NL_SKIP;
550 }
551
552 static int nl80211_get_protocol_features(const char *ifname)
553 {
554 struct nl80211_msg_conveyor *req;
555 uint32_t features = 0;
556
557 req = nl80211_msg(ifname, NL80211_CMD_GET_PROTOCOL_FEATURES, 0);
558 if (req) {
559 nl80211_send(req, nl80211_get_protocol_features_cb, &features);
560 nl80211_free(req);
561 }
562
563 return features;
564 }
565
566 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
567 {
568 struct nl80211_group_conveyor *cv = arg;
569
570 struct nlattr **attr = nl80211_parse(msg);
571 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
572 struct nlattr *mgrp;
573 int mgrpidx;
574
575 if (!attr[CTRL_ATTR_MCAST_GROUPS])
576 return NL_SKIP;
577
578 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
579 {
580 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
581 nla_data(mgrp), nla_len(mgrp), NULL);
582
583 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
584 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
585 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
586 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
587 {
588 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
589 break;
590 }
591 }
592
593 return NL_SKIP;
594 }
595
596 static int nl80211_subscribe(const char *family, const char *group)
597 {
598 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
599 struct nl80211_msg_conveyor *req;
600 int err;
601
602 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
603 if (req)
604 {
605 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
606 err = nl80211_send(req, nl80211_subscribe_cb, &cv);
607
608 if (err)
609 return err;
610
611 return nl_socket_add_membership(nls->nl_sock, cv.id);
612
613 nla_put_failure:
614 nl80211_free(req);
615 }
616
617 return -ENOMEM;
618 }
619
620
621 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
622 {
623 struct nl80211_event_conveyor *cv = arg;
624 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
625
626 if (cv->wait[gnlh->cmd / 32] & (1 << (gnlh->cmd % 32)))
627 cv->recv = gnlh->cmd;
628
629 return NL_SKIP;
630 }
631
632 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
633 {
634 return NL_OK;
635 }
636
637 static int __nl80211_wait(const char *family, const char *group, ...)
638 {
639 struct nl80211_event_conveyor cv = { };
640 struct nl_cb *cb;
641 int err = 0;
642 int cmd;
643 va_list ap;
644
645 if (nl80211_subscribe(family, group))
646 return -ENOENT;
647
648 cb = nl_cb_alloc(NL_CB_DEFAULT);
649
650 if (!cb)
651 return -ENOMEM;
652
653 nl_cb_err(cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
654 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
655 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
656
657 va_start(ap, group);
658
659 for (cmd = va_arg(ap, int); cmd != 0; cmd = va_arg(ap, int))
660 cv.wait[cmd / 32] |= (1 << (cmd % 32));
661
662 va_end(ap);
663
664 while (!cv.recv && !err)
665 nl_recvmsgs(nls->nl_sock, cb);
666
667 nl_cb_put(cb);
668
669 return err;
670 }
671
672 #define nl80211_wait(family, group, ...) \
673 __nl80211_wait(family, group, __VA_ARGS__, 0)
674
675 /* This is linux's ieee80211_freq_khz_to_channel() which is:
676 * SPDX-License-Identifier: GPL-2.0
677 * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net>
678 * Copyright 2013-2014 Intel Mobile Communications GmbH
679 * Copyright 2017 Intel Deutschland GmbH
680 * Copyright (C) 2018-2022 Intel Corporation
681 */
682 static int nl80211_freq2channel(int freq)
683 {
684 if (freq == 2484)
685 return 14;
686 else if (freq < 2484)
687 return (freq - 2407) / 5;
688 else if (freq >= 4910 && freq <= 4980)
689 return (freq - 4000) / 5;
690 else if (freq < 5925)
691 return (freq - 5000) / 5;
692 else if (freq == 5935)
693 return 2;
694 else if (freq <= 45000) /* DMG band lower limit */
695 /* see 802.11ax D6.1 27.3.22.2 */
696 return (freq - 5950) / 5;
697 else if (freq >= 58320 && freq <= 70200)
698 return (freq - 56160) / 2160;
699 else
700 return 0;
701 }
702
703 /* This is linux's ieee80211_channel_to_freq_khz() which is:
704 * SPDX-License-Identifier: GPL-2.0
705 * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net>
706 * Copyright 2013-2014 Intel Mobile Communications GmbH
707 * Copyright 2017 Intel Deutschland GmbH
708 * Copyright (C) 2018-2022 Intel Corporation
709 */
710 static int nl80211_channel2freq(int channel, const char *band, bool ax)
711 {
712 if (channel < 1)
713 return 0;
714
715 if (!band || band[0] != 'a')
716 {
717 if (channel == 14)
718 return 2484;
719 else if (channel < 14)
720 return (channel * 5) + 2407;
721 }
722 else if (strcmp(band, "ad") == 0)
723 {
724 if (channel < 7)
725 return 56160 + 2160 * channel;
726 }
727 else if (ax)
728 {
729 if (channel == 2)
730 return 5935;
731 if (channel < 233)
732 return (channel * 5) + 5950;
733 }
734 else
735 {
736 if (channel >= 182 && channel <= 196)
737 return (channel * 5) + 4000;
738 else
739 return (channel * 5) + 5000;
740 }
741
742 return 0;
743 }
744
745 static uint8_t nl80211_freq2band(int freq)
746 {
747 if (freq >= 2412 && freq <= 2484)
748 return IWINFO_BAND_24;
749 else if (freq >= 5160 && freq <= 5885)
750 return IWINFO_BAND_5;
751 else if (freq >= 5925 && freq <= 7125)
752 return IWINFO_BAND_6;
753 else if (freq >= 58320 && freq <= 69120)
754 return IWINFO_BAND_60;
755
756 return 0;
757 }
758
759 static int nl80211_phyname_cb(struct nl_msg *msg, void *arg)
760 {
761 char *buf = arg;
762 struct nlattr **attr = nl80211_parse(msg);
763
764 if (attr[NL80211_ATTR_WIPHY_NAME])
765 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
766 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
767 else
768 buf[0] = 0;
769
770 return NL_SKIP;
771 }
772
773 static char * nl80211_ifname2phy(const char *ifname)
774 {
775 static char phy[32] = { 0 };
776
777 memset(phy, 0, sizeof(phy));
778
779 nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
780 nl80211_phyname_cb, phy);
781
782 return phy[0] ? phy : NULL;
783 }
784
785 static char * nl80211_phyidx2name(unsigned int idx)
786 {
787 struct nl80211_msg_conveyor *cv;
788 static char phy[32] = { 0 };
789
790 if (nl80211_init() < 0)
791 return NULL;
792
793 cv = nl80211_new(nls->nl80211, NL80211_CMD_GET_WIPHY, 0);
794 if (!cv)
795 return NULL;
796
797 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, idx);
798
799 memset(phy, 0, sizeof(phy));
800 nl80211_send(cv, nl80211_phyname_cb, phy);
801
802 return phy[0] ? phy : NULL;
803
804 nla_put_failure:
805 return NULL;
806 }
807
808 static char * nl80211_phy2ifname(const char *ifname)
809 {
810 int ifidx = -1, cifidx, lmode = 1, clmode, phyidx;
811 char buffer[512];
812 static char nif[IFNAMSIZ] = { 0 };
813 DIR *d;
814 struct dirent *e;
815
816 /* Only accept phy name in the form of phy%d or radio%d */
817 if (!ifname)
818 return NULL;
819
820 phyidx = nl80211_phy_idx_from_phy(ifname);
821 if (phyidx < 0)
822 phyidx = nl80211_phy_idx_from_uci(ifname);;
823 if (phyidx < 0)
824 return NULL;
825
826 memset(nif, 0, sizeof(nif));
827
828 if ((d = opendir("/sys/class/net")) != NULL)
829 {
830 while ((e = readdir(d)) != NULL)
831 {
832 snprintf(buffer, sizeof(buffer),
833 "/sys/class/net/%s/phy80211/index", e->d_name);
834 if (nl80211_readint(buffer) != phyidx)
835 continue;
836
837 snprintf(buffer, sizeof(buffer),
838 "/sys/class/net/%s/ifindex", e->d_name);
839 cifidx = nl80211_readint(buffer);
840
841 if (cifidx < 0)
842 continue;
843
844 snprintf(buffer, sizeof(buffer),
845 "/sys/class/net/%s/link_mode", e->d_name);
846 clmode = nl80211_readint(buffer);
847
848 /* prefer non-supplicant-based devices */
849 if ((ifidx < 0) || (cifidx < ifidx) || ((lmode == 1) && (clmode != 1)))
850 {
851 ifidx = cifidx;
852 lmode = clmode;
853 strncpy(nif, e->d_name, sizeof(nif) - 1);
854 }
855 }
856
857 closedir(d);
858 }
859
860 return nif[0] ? nif : NULL;
861 }
862
863 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
864 {
865 int *mode = arg;
866 struct nlattr **tb = nl80211_parse(msg);
867 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
868 IWINFO_OPMODE_UNKNOWN, /* unspecified */
869 IWINFO_OPMODE_ADHOC, /* IBSS */
870 IWINFO_OPMODE_CLIENT, /* managed */
871 IWINFO_OPMODE_MASTER, /* AP */
872 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
873 IWINFO_OPMODE_WDS, /* WDS */
874 IWINFO_OPMODE_MONITOR, /* monitor */
875 IWINFO_OPMODE_MESHPOINT, /* mesh point */
876 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
877 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
878 };
879
880 if (tb[NL80211_ATTR_IFTYPE])
881 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
882
883 return NL_SKIP;
884 }
885
886
887 static int nl80211_get_mode(const char *ifname, int *buf)
888 {
889 char *res;
890
891 *buf = IWINFO_OPMODE_UNKNOWN;
892
893 res = nl80211_phy2ifname(ifname);
894
895 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
896 nl80211_get_mode_cb, buf);
897
898 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
899 }
900
901 static int __nl80211_hostapd_query(const char *ifname, ...)
902 {
903 va_list ap, ap_cur;
904 char *phy, *search, *dest, *key, *val, buf[128];
905 int len, mode, found = 0, match = 1;
906 FILE *fp;
907
908 if (nl80211_get_mode(ifname, &mode))
909 return 0;
910
911 if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN)
912 return 0;
913
914 phy = nl80211_ifname2phy(ifname);
915
916 if (!phy)
917 return 0;
918
919 snprintf(buf, sizeof(buf), "/var/run/hostapd-%s.conf", phy);
920 fp = fopen(buf, "r");
921
922 if (!fp)
923 return 0;
924
925 va_start(ap, ifname);
926
927 /* clear all destination buffers */
928 va_copy(ap_cur, ap);
929
930 while ((search = va_arg(ap_cur, char *)) != NULL)
931 {
932 dest = va_arg(ap_cur, char *);
933 len = va_arg(ap_cur, int);
934
935 memset(dest, 0, len);
936 }
937
938 va_end(ap_cur);
939
940 /* iterate applicable lines and copy found values into dest buffers */
941 while (fgets(buf, sizeof(buf), fp))
942 {
943 key = strtok(buf, " =\t\n");
944 val = strtok(NULL, "\n");
945
946 if (!key || !val || !*key || *key == '#')
947 continue;
948
949 if (!strcmp(key, "interface") || !strcmp(key, "bss"))
950 match = !strcmp(ifname, val);
951
952 if (!match)
953 continue;
954
955 va_copy(ap_cur, ap);
956
957 while ((search = va_arg(ap_cur, char *)) != NULL)
958 {
959 dest = va_arg(ap_cur, char *);
960 len = va_arg(ap_cur, int);
961
962 if (!strcmp(search, key))
963 {
964 strncpy(dest, val, len - 1);
965 found++;
966 break;
967 }
968 }
969
970 va_end(ap_cur);
971 }
972
973 fclose(fp);
974
975 va_end(ap);
976
977 return found;
978 }
979
980 #define nl80211_hostapd_query(ifname, ...) \
981 __nl80211_hostapd_query(ifname, ##__VA_ARGS__, NULL)
982
983
984 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
985 {
986 fd_set rfds;
987 struct timeval tv = { 0, 256000 };
988
989 FD_ZERO(&rfds);
990 FD_SET(sock, &rfds);
991
992 memset(buf, 0, blen);
993
994 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
995 return -1;
996
997 if (!FD_ISSET(sock, &rfds))
998 return -1;
999
1000 return recv(sock, buf, blen - 1, 0);
1001 }
1002
1003 static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local)
1004 {
1005 struct sockaddr_un remote = { 0 };
1006 size_t remote_length, local_length;
1007
1008 int sock = socket(PF_UNIX, SOCK_DGRAM, 0);
1009 if (sock < 0)
1010 return sock;
1011
1012 remote.sun_family = AF_UNIX;
1013 remote_length = sizeof(remote.sun_family) +
1014 sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname);
1015
1016 /* Set client socket file permissions so that bind() creates the client
1017 * socket with these permissions and there is no need to try to change
1018 * them with chmod() after bind() which would have potential issues with
1019 * race conditions. These permissions are needed to make sure the server
1020 * side (wpa_supplicant or hostapd) can reply to the control interface
1021 * messages.
1022 *
1023 * The lchown() calls below after bind() are also part of the needed
1024 * operations to allow the response to go through. Those are using the
1025 * no-deference-symlinks version to avoid races. */
1026 fchmod(sock, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
1027
1028 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
1029 {
1030 close(sock);
1031 return -1;
1032 }
1033
1034 if (connect(sock, (struct sockaddr *)&remote, remote_length))
1035 {
1036 close(sock);
1037 return -1;
1038 }
1039
1040 local->sun_family = AF_UNIX;
1041 local_length = sizeof(local->sun_family) +
1042 sprintf(local->sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
1043
1044 if (bind(sock, (struct sockaddr *)local, local_length) < 0)
1045 {
1046 close(sock);
1047 return -1;
1048 }
1049
1050 /* Set group even if we do not have privileges to change owner */
1051 lchown(local->sun_path, -1, 101);
1052 lchown(local->sun_path, 101, 101);
1053
1054 return sock;
1055 }
1056
1057 static int __nl80211_wpactl_query(const char *ifname, ...)
1058 {
1059 va_list ap, ap_cur;
1060 struct sockaddr_un local = { 0 };
1061 int len, mode, found = 0, sock = -1;
1062 char *search, *dest, *key, *val, *line, *pos, buf[512];
1063
1064 if (nl80211_get_mode(ifname, &mode))
1065 return 0;
1066
1067 if (mode != IWINFO_OPMODE_CLIENT &&
1068 mode != IWINFO_OPMODE_ADHOC &&
1069 mode != IWINFO_OPMODE_MESHPOINT)
1070 return 0;
1071
1072 sock = nl80211_wpactl_connect(ifname, &local);
1073
1074 if (sock < 0)
1075 return 0;
1076
1077 va_start(ap, ifname);
1078
1079 /* clear all destination buffers */
1080 va_copy(ap_cur, ap);
1081
1082 while ((search = va_arg(ap_cur, char *)) != NULL)
1083 {
1084 dest = va_arg(ap_cur, char *);
1085 len = va_arg(ap_cur, int);
1086
1087 memset(dest, 0, len);
1088 }
1089
1090 va_end(ap_cur);
1091
1092 send(sock, "STATUS", 6, 0);
1093
1094 while (true)
1095 {
1096 if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0)
1097 break;
1098
1099 if (buf[0] == '<')
1100 continue;
1101
1102 for (line = strtok_r(buf, "\n", &pos);
1103 line != NULL;
1104 line = strtok_r(NULL, "\n", &pos))
1105 {
1106 key = strtok(line, "=");
1107 val = strtok(NULL, "\n");
1108
1109 if (!key || !val)
1110 continue;
1111
1112 va_copy(ap_cur, ap);
1113
1114 while ((search = va_arg(ap_cur, char *)) != NULL)
1115 {
1116 dest = va_arg(ap_cur, char *);
1117 len = va_arg(ap_cur, int);
1118
1119 if (!strcmp(search, key))
1120 {
1121 strncpy(dest, val, len - 1);
1122 found++;
1123 break;
1124 }
1125 }
1126
1127 va_end(ap_cur);
1128 }
1129
1130 break;
1131 }
1132
1133 va_end(ap);
1134
1135 close(sock);
1136 unlink(local.sun_path);
1137
1138 return found;
1139 }
1140
1141 #define nl80211_wpactl_query(ifname, ...) \
1142 __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL)
1143
1144
1145 static char * nl80211_ifadd(const char *ifname)
1146 {
1147 char path[PATH_MAX];
1148 static char nif[IFNAMSIZ] = { 0 };
1149 struct nl80211_msg_conveyor *req;
1150 FILE *sysfs;
1151
1152 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
1153 if (req)
1154 {
1155 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
1156
1157 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
1158 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
1159
1160 nl80211_send(req, NULL, NULL);
1161
1162 snprintf(path, sizeof(path) - 1,
1163 "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif);
1164
1165 if ((sysfs = fopen(path, "w")) != NULL)
1166 {
1167 fwrite("0\n", 1, 2, sysfs);
1168 fclose(sysfs);
1169 }
1170
1171 return nif;
1172
1173 nla_put_failure:
1174 nl80211_free(req);
1175 }
1176
1177 return NULL;
1178 }
1179
1180 static void nl80211_ifdel(const char *ifname)
1181 {
1182 struct nl80211_msg_conveyor *req;
1183
1184 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
1185 if (req)
1186 {
1187 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
1188
1189 nl80211_send(req, NULL, NULL);
1190 return;
1191
1192 nla_put_failure:
1193 nl80211_free(req);
1194 }
1195 }
1196
1197 static void nl80211_hostapd_hup(const char *ifname)
1198 {
1199 int fd, pid = 0;
1200 char buf[32];
1201 char *phy = nl80211_ifname2phy(ifname);
1202
1203 if (phy)
1204 {
1205 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
1206 if ((fd = open(buf, O_RDONLY)) >= 0)
1207 {
1208 if (read(fd, buf, sizeof(buf)) > 0)
1209 pid = atoi(buf);
1210
1211 close(fd);
1212 }
1213
1214 if (pid > 0)
1215 kill(pid, 1);
1216 }
1217 }
1218
1219
1220 static int nl80211_probe(const char *ifname)
1221 {
1222 return !!nl80211_ifname2phy(ifname);
1223 }
1224
1225 struct nl80211_ssid_bssid {
1226 unsigned char *ssid;
1227 unsigned char bssid[7];
1228 };
1229
1230 static int nl80211_get_macaddr_cb(struct nl_msg *msg, void *arg)
1231 {
1232 struct nl80211_ssid_bssid *sb = arg;
1233 struct nlattr **tb = nl80211_parse(msg);
1234
1235 if (tb[NL80211_ATTR_MAC]) {
1236 sb->bssid[0] = 1;
1237 memcpy(sb->bssid + 1, nla_data(tb[NL80211_ATTR_MAC]),
1238 sizeof(sb->bssid) - 1);
1239 }
1240
1241 return NL_SKIP;
1242 }
1243
1244 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
1245 {
1246 int ielen;
1247 unsigned char *ie;
1248 struct nl80211_ssid_bssid *sb = arg;
1249 struct nlattr **tb = nl80211_parse(msg);
1250 struct nlattr *bss[NL80211_BSS_MAX + 1];
1251
1252 static const struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1253 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
1254 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1255 };
1256
1257 if (!tb[NL80211_ATTR_BSS] ||
1258 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1259 bss_policy) ||
1260 !bss[NL80211_BSS_BSSID] ||
1261 !bss[NL80211_BSS_STATUS] ||
1262 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
1263 {
1264 return NL_SKIP;
1265 }
1266
1267 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
1268 {
1269 case NL80211_BSS_STATUS_ASSOCIATED:
1270 case NL80211_BSS_STATUS_AUTHENTICATED:
1271 case NL80211_BSS_STATUS_IBSS_JOINED:
1272
1273 if (sb->ssid)
1274 {
1275 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1276 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1277
1278 while (ielen >= 2 && ielen >= ie[1])
1279 {
1280 if (ie[0] == 0)
1281 {
1282 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1283 return NL_SKIP;
1284 }
1285
1286 ielen -= ie[1] + 2;
1287 ie += ie[1] + 2;
1288 }
1289 }
1290 else
1291 {
1292 sb->bssid[0] = 1;
1293 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
1294 return NL_SKIP;
1295 }
1296
1297 default:
1298 return NL_SKIP;
1299 }
1300 }
1301
1302 static int nl80211_get_ssid(const char *ifname, char *buf)
1303 {
1304 char *res;
1305 struct nl80211_ssid_bssid sb = { .ssid = (unsigned char *)buf };
1306
1307 /* try to find ssid from scan dump results */
1308 res = nl80211_phy2ifname(ifname);
1309 sb.ssid[0] = 0;
1310
1311 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1312 nl80211_get_ssid_bssid_cb, &sb);
1313
1314 /* failed, try to find from hostapd info */
1315 if (sb.ssid[0] == 0)
1316 nl80211_hostapd_query(ifname, "ssid", sb.ssid,
1317 IWINFO_ESSID_MAX_SIZE + 1);
1318
1319 /* failed, try to obtain Mesh ID */
1320 if (sb.ssid[0] == 0)
1321 iwinfo_ubus_query(res ? res : ifname, "mesh_id",
1322 buf, IWINFO_ESSID_MAX_SIZE + 1);
1323
1324 return (sb.ssid[0] == 0) ? -1 : 0;
1325 }
1326
1327 static int nl80211_get_bssid(const char *ifname, char *buf)
1328 {
1329 char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")];
1330 struct nl80211_ssid_bssid sb = { };
1331
1332 res = nl80211_phy2ifname(ifname);
1333
1334 /* try to obtain mac address via NL80211_CMD_GET_INTERFACE */
1335 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1336 nl80211_get_macaddr_cb, &sb);
1337
1338 /* failed, try to find bssid from scan dump results */
1339 if (sb.bssid[0] == 0)
1340 nl80211_request(res ? res : ifname,
1341 NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1342 nl80211_get_ssid_bssid_cb, &sb);
1343
1344 /* failed, try to find mac from hostapd info */
1345 if ((sb.bssid[0] == 0) &&
1346 nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid)))
1347 {
1348 sb.bssid[0] = 1;
1349 sb.bssid[1] = strtol(&bssid[0], NULL, 16);
1350 sb.bssid[2] = strtol(&bssid[3], NULL, 16);
1351 sb.bssid[3] = strtol(&bssid[6], NULL, 16);
1352 sb.bssid[4] = strtol(&bssid[9], NULL, 16);
1353 sb.bssid[5] = strtol(&bssid[12], NULL, 16);
1354 sb.bssid[6] = strtol(&bssid[15], NULL, 16);
1355 }
1356
1357 if (sb.bssid[0])
1358 {
1359 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
1360 sb.bssid[1], sb.bssid[2], sb.bssid[3],
1361 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
1362
1363 return 0;
1364 }
1365
1366 return -1;
1367 }
1368
1369
1370 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
1371 {
1372 int *freq = arg;
1373 struct nlattr **attr = nl80211_parse(msg);
1374 struct nlattr *binfo[NL80211_BSS_MAX + 1];
1375
1376 static const struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1377 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1378 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1379 };
1380
1381 if (attr[NL80211_ATTR_BSS] &&
1382 !nla_parse_nested(binfo, NL80211_BSS_MAX,
1383 attr[NL80211_ATTR_BSS], bss_policy))
1384 {
1385 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
1386 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
1387 }
1388
1389 return NL_SKIP;
1390 }
1391
1392 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
1393 {
1394 int *freq = arg;
1395 struct nlattr **tb = nl80211_parse(msg);
1396
1397 if (tb[NL80211_ATTR_WIPHY_FREQ])
1398 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
1399
1400 return NL_SKIP;
1401 }
1402
1403 static int nl80211_get_frequency(const char *ifname, int *buf)
1404 {
1405 char *res, channel[4] = { 0 }, hwmode[3] = { 0 }, ax[2] = { 0 };
1406
1407 /* try to find frequency from interface info */
1408 res = nl80211_phy2ifname(ifname);
1409 *buf = 0;
1410
1411 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1412 nl80211_get_frequency_info_cb, buf);
1413
1414 /* failed, try to find frequency from hostapd info */
1415 if ((*buf == 0) &&
1416 nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode),
1417 "channel", channel, sizeof(channel),
1418 "ieee80211ax", ax, sizeof(ax)) >= 2)
1419 {
1420 *buf = nl80211_channel2freq(atoi(channel), hwmode, ax[0] == '1');
1421 }
1422
1423 /* failed, try to find frequency from scan results */
1424 if (*buf == 0)
1425 {
1426 res = nl80211_phy2ifname(ifname);
1427
1428 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1429 nl80211_get_frequency_scan_cb, buf);
1430 }
1431
1432 return (*buf == 0) ? -1 : 0;
1433 }
1434
1435 static int nl80211_get_center_freq1_cb(struct nl_msg *msg, void *arg)
1436 {
1437 int *freq = arg;
1438 struct nlattr **tb = nl80211_parse(msg);
1439
1440 if (tb[NL80211_ATTR_CENTER_FREQ1])
1441 *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ1]);
1442
1443 return NL_SKIP;
1444 }
1445
1446 static int nl80211_get_center_freq1(const char *ifname, int *buf)
1447 {
1448 char *res;
1449
1450 /* try to find frequency from interface info */
1451 res = nl80211_phy2ifname(ifname);
1452 *buf = 0;
1453
1454 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1455 nl80211_get_center_freq1_cb, buf);
1456
1457 return (*buf == 0) ? -1 : 0;
1458 }
1459
1460 static int nl80211_get_center_freq2_cb(struct nl_msg *msg, void *arg)
1461 {
1462 int *freq = arg;
1463 struct nlattr **tb = nl80211_parse(msg);
1464
1465 if (tb[NL80211_ATTR_CENTER_FREQ2])
1466 *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ2]);
1467
1468 return NL_SKIP;
1469 }
1470
1471 static int nl80211_get_center_freq2(const char *ifname, int *buf)
1472 {
1473 char *res;
1474
1475 /* try to find frequency from interface info */
1476 res = nl80211_phy2ifname(ifname);
1477 *buf = 0;
1478
1479 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1480 nl80211_get_center_freq2_cb, buf);
1481
1482 return (*buf == 0) ? -1 : 0;
1483 }
1484
1485 static int nl80211_get_channel(const char *ifname, int *buf)
1486 {
1487 if (!nl80211_get_frequency(ifname, buf))
1488 {
1489 *buf = nl80211_freq2channel(*buf);
1490 return 0;
1491 }
1492
1493 return -1;
1494 }
1495
1496 static int nl80211_get_center_chan1(const char *ifname, int *buf)
1497 {
1498 if (!nl80211_get_center_freq1(ifname, buf))
1499 {
1500 *buf = nl80211_freq2channel(*buf);
1501 return 0;
1502 }
1503
1504 return -1;
1505 }
1506
1507 static int nl80211_get_center_chan2(const char *ifname, int *buf)
1508 {
1509 if (!nl80211_get_center_freq2(ifname, buf))
1510 {
1511 *buf = nl80211_freq2channel(*buf);
1512 return 0;
1513 }
1514
1515 return -1;
1516 }
1517
1518 static int nl80211_get_txpower_cb(struct nl_msg *msg, void *arg)
1519 {
1520 int *buf = arg;
1521 struct nlattr **tb = nl80211_parse(msg);
1522
1523 if (tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL])
1524 *buf = iwinfo_mbm2dbm(nla_get_u32(tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL]));
1525
1526 return NL_SKIP;
1527 }
1528
1529 static int nl80211_get_txpower(const char *ifname, int *buf)
1530 {
1531 char *res;
1532
1533 res = nl80211_phy2ifname(ifname);
1534 *buf = 0;
1535
1536 if (nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1537 nl80211_get_txpower_cb, buf))
1538 return -1;
1539
1540 return 0;
1541 }
1542
1543
1544 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1545 {
1546 int8_t dbm;
1547 int16_t mbit;
1548 struct nl80211_rssi_rate *rr = arg;
1549 struct nlattr **attr = nl80211_parse(msg);
1550 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1551 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1552
1553 static const struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1554 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1555 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1556 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1557 [NL80211_STA_INFO_RX_BYTES64] = { .type = NLA_U64 },
1558 [NL80211_STA_INFO_TX_BYTES64] = { .type = NLA_U64 },
1559 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1560 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1561 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1562 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1563 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1564 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1565 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1566 };
1567
1568 static const struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1569 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1570 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1571 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1572 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1573 };
1574
1575 if (attr[NL80211_ATTR_STA_INFO])
1576 {
1577 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1578 attr[NL80211_ATTR_STA_INFO], stats_policy))
1579 {
1580 if (sinfo[NL80211_STA_INFO_SIGNAL])
1581 {
1582 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1583 rr->rssi = (rr->rssi * rr->rssi_samples + dbm) / (rr->rssi_samples + 1);
1584 rr->rssi_samples++;
1585 }
1586
1587 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1588 {
1589 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1590 sinfo[NL80211_STA_INFO_TX_BITRATE],
1591 rate_policy))
1592 {
1593 if (rinfo[NL80211_RATE_INFO_BITRATE])
1594 {
1595 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1596 rr->rate = (rr->rate * rr->rate_samples + mbit) / (rr->rate_samples + 1);
1597 rr->rate_samples++;
1598 }
1599 }
1600 }
1601 }
1602 }
1603
1604 return NL_SKIP;
1605 }
1606
1607 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1608 {
1609 DIR *d;
1610 struct dirent *de;
1611
1612 memset(r, 0, sizeof(*r));
1613
1614 if ((d = opendir("/sys/class/net")) != NULL)
1615 {
1616 while ((de = readdir(d)) != NULL)
1617 {
1618 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1619 (!de->d_name[strlen(ifname)] ||
1620 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1621 {
1622 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
1623 NLM_F_DUMP, nl80211_fill_signal_cb, r);
1624 }
1625 }
1626
1627 closedir(d);
1628 }
1629 }
1630
1631 static int nl80211_get_bitrate(const char *ifname, int *buf)
1632 {
1633 struct nl80211_rssi_rate rr;
1634
1635 nl80211_fill_signal(ifname, &rr);
1636
1637 if (rr.rate_samples)
1638 {
1639 *buf = (rr.rate * 100);
1640 return 0;
1641 }
1642
1643 return -1;
1644 }
1645
1646 static int nl80211_get_signal(const char *ifname, int *buf)
1647 {
1648 struct nl80211_rssi_rate rr;
1649
1650 nl80211_fill_signal(ifname, &rr);
1651
1652 if (rr.rssi_samples)
1653 {
1654 *buf = rr.rssi;
1655 return 0;
1656 }
1657
1658 return -1;
1659 }
1660
1661 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1662 {
1663 int8_t *noise = arg;
1664 struct nlattr **tb = nl80211_parse(msg);
1665 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1666
1667 static const struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1668 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1669 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1670 };
1671
1672 if (!tb[NL80211_ATTR_SURVEY_INFO])
1673 return NL_SKIP;
1674
1675 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1676 tb[NL80211_ATTR_SURVEY_INFO], sp))
1677 return NL_SKIP;
1678
1679 if (!si[NL80211_SURVEY_INFO_NOISE])
1680 return NL_SKIP;
1681
1682 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1683 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1684
1685 return NL_SKIP;
1686 }
1687
1688
1689 static int nl80211_get_noise(const char *ifname, int *buf)
1690 {
1691 int8_t noise = 0;
1692
1693 if (nl80211_request(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP,
1694 nl80211_get_noise_cb, &noise))
1695 goto out;
1696
1697 *buf = noise;
1698 return 0;
1699
1700 out:
1701 *buf = 0;
1702 return -1;
1703 }
1704
1705 static int nl80211_get_quality(const char *ifname, int *buf)
1706 {
1707 int signal;
1708
1709 if (!nl80211_get_signal(ifname, &signal))
1710 {
1711 /* A positive signal level is usually just a quality
1712 * value, pass through as-is */
1713 if (signal >= 0)
1714 {
1715 *buf = signal;
1716 }
1717
1718 /* The cfg80211 wext compat layer assumes a signal range
1719 * of -110 dBm to -40 dBm, the quality value is derived
1720 * by adding 110 to the signal level */
1721 else
1722 {
1723 if (signal < -110)
1724 signal = -110;
1725 else if (signal > -40)
1726 signal = -40;
1727
1728 *buf = (signal + 110);
1729 }
1730
1731 return 0;
1732 }
1733
1734 return -1;
1735 }
1736
1737 static int nl80211_get_quality_max(const char *ifname, int *buf)
1738 {
1739 /* The cfg80211 wext compat layer assumes a maximum
1740 * quality of 70 */
1741 *buf = 70;
1742
1743 return 0;
1744 }
1745
1746 static int nl80211_check_wepkey(const char *key)
1747 {
1748 if (key && *key)
1749 {
1750 switch (strlen(key))
1751 {
1752 case 5:
1753 case 10:
1754 return IWINFO_CIPHER_WEP40;
1755
1756 case 13:
1757 case 26:
1758 return IWINFO_CIPHER_WEP104;
1759 }
1760 }
1761
1762 return 0;
1763 }
1764
1765 static const struct {
1766 const char *match;
1767 int version;
1768 int suite;
1769 } wpa_key_mgmt_strings[] = {
1770 { "IEEE 802.1X/EAP", 0, IWINFO_KMGMT_8021x },
1771 { "EAP-SUITE-B-192", 4, IWINFO_KMGMT_8021x },
1772 { "EAP-SUITE-B", 4, IWINFO_KMGMT_8021x },
1773 { "EAP-SHA384", 4, IWINFO_KMGMT_8021x },
1774 { "EAP-SHA256", 0, IWINFO_KMGMT_8021x },
1775 { "PSK-SHA256", 0, IWINFO_KMGMT_PSK },
1776 { "NONE", 0, IWINFO_KMGMT_NONE },
1777 { "None", 0, IWINFO_KMGMT_NONE },
1778 { "PSK", 0, IWINFO_KMGMT_PSK },
1779 { "EAP", 0, IWINFO_KMGMT_8021x },
1780 { "SAE", 4, IWINFO_KMGMT_SAE },
1781 { "OWE", 4, IWINFO_KMGMT_OWE }
1782 };
1783
1784 static void parse_wpa_suites(const char *str, int defversion,
1785 uint8_t *versions, uint8_t *suites)
1786 {
1787 size_t l;
1788 int i, version;
1789 const char *p, *q, *m, *sep = " \t\n,-+/";
1790
1791 for (p = str; *p; )
1792 {
1793 q = p;
1794
1795 for (i = 0; i < ARRAY_SIZE(wpa_key_mgmt_strings); i++)
1796 {
1797 m = wpa_key_mgmt_strings[i].match;
1798 l = strlen(m);
1799
1800 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l])))
1801 {
1802 if (wpa_key_mgmt_strings[i].version != 0)
1803 version = wpa_key_mgmt_strings[i].version;
1804 else
1805 version = defversion;
1806
1807 *versions |= version;
1808 *suites |= wpa_key_mgmt_strings[i].suite;
1809
1810 q += l;
1811 break;
1812 }
1813 }
1814
1815 if (q == p)
1816 q += strcspn(q, sep);
1817
1818 p = q + strspn(q, sep);
1819 }
1820 }
1821
1822 static const struct {
1823 const char *match;
1824 int cipher;
1825 } wpa_cipher_strings[] = {
1826 { "WEP-104", IWINFO_CIPHER_WEP104 },
1827 { "WEP-40", IWINFO_CIPHER_WEP40 },
1828 { "NONE", IWINFO_CIPHER_NONE },
1829 { "TKIP", IWINFO_CIPHER_TKIP },
1830 { "CCMP-256",IWINFO_CIPHER_CCMP256 },
1831 { "CCMP", IWINFO_CIPHER_CCMP },
1832 { "GCMP-256",IWINFO_CIPHER_GCMP256 },
1833 { "GCMP", IWINFO_CIPHER_GCMP }
1834 };
1835
1836 static void parse_wpa_ciphers(const char *str, uint16_t *ciphers)
1837 {
1838 int i;
1839 size_t l;
1840 const char *m, *p, *q, *sep = " \t\n,-+/";
1841
1842 for (p = str; *p; )
1843 {
1844 q = p;
1845
1846 for (i = 0; i < ARRAY_SIZE(wpa_cipher_strings); i++)
1847 {
1848 m = wpa_cipher_strings[i].match;
1849 l = strlen(m);
1850
1851 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l])))
1852 {
1853 *ciphers |= wpa_cipher_strings[i].cipher;
1854
1855 q += l;
1856 break;
1857 }
1858 }
1859
1860 if (q == p)
1861 q += strcspn(q, sep);
1862
1863 p = q + strspn(q, sep);
1864 }
1865 }
1866
1867 static int nl80211_get_encryption(const char *ifname, char *buf)
1868 {
1869 char *p;
1870 int opmode;
1871 uint8_t wpa_version = 0;
1872 char wpa[2], wpa_key_mgmt[64], wpa_pairwise[16], wpa_groupwise[16];
1873 char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27];
1874 char mode[16];
1875
1876 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1877
1878 /* WPA supplicant */
1879 if (nl80211_wpactl_query(ifname,
1880 "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise),
1881 "group_cipher", wpa_groupwise, sizeof(wpa_groupwise),
1882 "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1883 "mode", mode, sizeof(mode)))
1884 {
1885 /* WEP or Open */
1886 if (!strcmp(wpa_key_mgmt, "NONE"))
1887 {
1888 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1889 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers);
1890
1891 if (c->pair_ciphers != 0 && c->pair_ciphers != IWINFO_CIPHER_NONE) {
1892 c->enabled = 1;
1893 c->auth_suites = IWINFO_KMGMT_NONE;
1894 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1895 }
1896 else {
1897 c->pair_ciphers = 0;
1898 c->group_ciphers = 0;
1899 }
1900 }
1901
1902 /* MESH with SAE */
1903 else if (!strcmp(mode, "mesh") && !strcmp(wpa_key_mgmt, "UNKNOWN"))
1904 {
1905 c->enabled = 1;
1906 c->wpa_version = 4;
1907 c->auth_suites = IWINFO_KMGMT_SAE;
1908 c->pair_ciphers = IWINFO_CIPHER_CCMP;
1909 c->group_ciphers = IWINFO_CIPHER_CCMP;
1910 }
1911
1912 /* WPA */
1913 else
1914 {
1915 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1916 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers);
1917
1918 p = wpa_key_mgmt;
1919
1920 if (!strncmp(p, "WPA2-", 5) || !strncmp(p, "WPA2/", 5))
1921 {
1922 p += 5;
1923 wpa_version = 2;
1924 }
1925 else if (!strncmp(p, "WPA-", 4))
1926 {
1927 p += 4;
1928 wpa_version = 1;
1929 }
1930
1931 parse_wpa_suites(p, wpa_version, &c->wpa_version, &c->auth_suites);
1932
1933 c->enabled = !!(c->wpa_version && c->auth_suites);
1934 }
1935
1936 return 0;
1937 }
1938
1939 /* Hostapd */
1940 else if (nl80211_hostapd_query(ifname,
1941 "wpa", wpa, sizeof(wpa),
1942 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1943 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise),
1944 "auth_algs", auth_algs, sizeof(auth_algs),
1945 "wep_key0", wep_key0, sizeof(wep_key0),
1946 "wep_key1", wep_key1, sizeof(wep_key1),
1947 "wep_key2", wep_key2, sizeof(wep_key2),
1948 "wep_key3", wep_key3, sizeof(wep_key3)))
1949 {
1950 c->wpa_version = 0;
1951
1952 if (wpa_key_mgmt[0])
1953 {
1954 for (p = strtok(wpa_key_mgmt, " \t"); p != NULL; p = strtok(NULL, " \t"))
1955 {
1956 if (!strncmp(p, "WPA-", 4))
1957 p += 4;
1958
1959 if (!strncmp(p, "FT-", 3))
1960 p += 3;
1961
1962 parse_wpa_suites(p, atoi(wpa), &c->wpa_version, &c->auth_suites);
1963 }
1964
1965 c->enabled = c->wpa_version ? 1 : 0;
1966 }
1967
1968 if (wpa_pairwise[0])
1969 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1970
1971 if (auth_algs[0])
1972 {
1973 switch (atoi(auth_algs))
1974 {
1975 case 1:
1976 c->auth_algs |= IWINFO_AUTH_OPEN;
1977 break;
1978
1979 case 2:
1980 c->auth_algs |= IWINFO_AUTH_SHARED;
1981 break;
1982
1983 case 3:
1984 c->auth_algs |= IWINFO_AUTH_OPEN;
1985 c->auth_algs |= IWINFO_AUTH_SHARED;
1986 break;
1987 }
1988
1989 c->pair_ciphers |= nl80211_check_wepkey(wep_key0);
1990 c->pair_ciphers |= nl80211_check_wepkey(wep_key1);
1991 c->pair_ciphers |= nl80211_check_wepkey(wep_key2);
1992 c->pair_ciphers |= nl80211_check_wepkey(wep_key3);
1993
1994 c->enabled = (c->auth_algs && c->pair_ciphers) ? 1 : 0;
1995 }
1996
1997 c->group_ciphers = c->pair_ciphers;
1998
1999 return 0;
2000 }
2001
2002 /* Ad-Hoc or Mesh interfaces without wpa_supplicant are open */
2003 else if (!nl80211_get_mode(ifname, &opmode) &&
2004 (opmode == IWINFO_OPMODE_ADHOC ||
2005 opmode == IWINFO_OPMODE_MESHPOINT))
2006 {
2007 c->enabled = 0;
2008
2009 return 0;
2010 }
2011
2012
2013 return -1;
2014 }
2015
2016 static int nl80211_get_phyname(const char *ifname, char *buf)
2017 {
2018 const char *name;
2019
2020 name = nl80211_ifname2phy(ifname);
2021
2022 if (name)
2023 {
2024 strcpy(buf, name);
2025 return 0;
2026 }
2027 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
2028 {
2029 name = nl80211_ifname2phy(name);
2030
2031 if (name)
2032 {
2033 strcpy(buf, ifname);
2034 return 0;
2035 }
2036 }
2037
2038 return -1;
2039 }
2040
2041
2042 static void nl80211_parse_rateinfo(struct nlattr **ri,
2043 struct iwinfo_rate_entry *re)
2044 {
2045 if (ri[NL80211_RATE_INFO_BITRATE32])
2046 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100;
2047 else if (ri[NL80211_RATE_INFO_BITRATE])
2048 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100;
2049
2050 if (ri[NL80211_RATE_INFO_HE_MCS])
2051 {
2052 re->is_he = 1;
2053 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_HE_MCS]);
2054
2055 if (ri[NL80211_RATE_INFO_HE_NSS])
2056 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_HE_NSS]);
2057 if (ri[NL80211_RATE_INFO_HE_GI])
2058 re->he_gi = nla_get_u8(ri[NL80211_RATE_INFO_HE_GI]);
2059 if (ri[NL80211_RATE_INFO_HE_DCM])
2060 re->he_dcm = nla_get_u8(ri[NL80211_RATE_INFO_HE_DCM]);
2061 }
2062 else if (ri[NL80211_RATE_INFO_VHT_MCS])
2063 {
2064 re->is_vht = 1;
2065 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]);
2066
2067 if (ri[NL80211_RATE_INFO_VHT_NSS])
2068 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]);
2069 }
2070 else if (ri[NL80211_RATE_INFO_MCS])
2071 {
2072 re->is_ht = 1;
2073 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]);
2074 }
2075
2076 if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH])
2077 re->mhz = 5;
2078 else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH])
2079 re->mhz = 10;
2080 else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH])
2081 re->mhz = 40;
2082 else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH])
2083 re->mhz = 80;
2084 else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] ||
2085 ri[NL80211_RATE_INFO_160_MHZ_WIDTH])
2086 re->mhz = 160;
2087 else
2088 re->mhz = 20;
2089
2090 if (ri[NL80211_RATE_INFO_SHORT_GI])
2091 re->is_short_gi = 1;
2092
2093 re->is_40mhz = (re->mhz == 40);
2094 }
2095
2096 static int nl80211_get_survey_cb(struct nl_msg *msg, void *arg)
2097 {
2098 struct nl80211_array_buf *arr = arg;
2099 struct iwinfo_survey_entry *e = arr->buf;
2100 struct nlattr **attr = nl80211_parse(msg);
2101 struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
2102 int rc;
2103
2104 static const struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
2105 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
2106 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
2107 [NL80211_SURVEY_INFO_TIME] = { .type = NLA_U64 },
2108 [NL80211_SURVEY_INFO_TIME_BUSY] = { .type = NLA_U64 },
2109 [NL80211_SURVEY_INFO_TIME_EXT_BUSY] = { .type = NLA_U64 },
2110 [NL80211_SURVEY_INFO_TIME_RX] = { .type = NLA_U64 },
2111 [NL80211_SURVEY_INFO_TIME_TX] = { .type = NLA_U64 },
2112 };
2113
2114 rc = nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
2115 attr[NL80211_ATTR_SURVEY_INFO],
2116 survey_policy);
2117 if (rc)
2118 return NL_SKIP;
2119
2120 /* advance to end of array */
2121 e += arr->count;
2122 memset(e, 0, sizeof(*e));
2123
2124 if (sinfo[NL80211_SURVEY_INFO_FREQUENCY])
2125 e->mhz = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]);
2126
2127 if (sinfo[NL80211_SURVEY_INFO_NOISE])
2128 e->noise = nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
2129
2130 if (sinfo[NL80211_SURVEY_INFO_TIME])
2131 e->active_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME]);
2132
2133 if (sinfo[NL80211_SURVEY_INFO_TIME_BUSY])
2134 e->busy_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_BUSY]);
2135
2136 if (sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY])
2137 e->busy_time_ext = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]);
2138
2139 if (sinfo[NL80211_SURVEY_INFO_TIME_RX])
2140 e->rxtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_RX]);
2141
2142 if (sinfo[NL80211_SURVEY_INFO_TIME_TX])
2143 e->txtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_TX]);
2144
2145 arr->count++;
2146 return NL_SKIP;
2147 }
2148
2149
2150 static void plink_state_to_str(char *dst, unsigned state)
2151 {
2152 switch (state) {
2153 case NL80211_PLINK_LISTEN:
2154 strcpy(dst, "LISTEN");
2155 break;
2156 case NL80211_PLINK_OPN_SNT:
2157 strcpy(dst, "OPN_SNT");
2158 break;
2159 case NL80211_PLINK_OPN_RCVD:
2160 strcpy(dst, "OPN_RCVD");
2161 break;
2162 case NL80211_PLINK_CNF_RCVD:
2163 strcpy(dst, "CNF_RCVD");
2164 break;
2165 case NL80211_PLINK_ESTAB:
2166 strcpy(dst, "ESTAB");
2167 break;
2168 case NL80211_PLINK_HOLDING:
2169 strcpy(dst, "HOLDING");
2170 break;
2171 case NL80211_PLINK_BLOCKED:
2172 strcpy(dst, "BLOCKED");
2173 break;
2174 default:
2175 strcpy(dst, "UNKNOWN");
2176 break;
2177 }
2178 }
2179
2180 static void power_mode_to_str(char *dst, struct nlattr *a)
2181 {
2182 enum nl80211_mesh_power_mode pm = nla_get_u32(a);
2183
2184 switch (pm) {
2185 case NL80211_MESH_POWER_ACTIVE:
2186 strcpy(dst, "ACTIVE");
2187 break;
2188 case NL80211_MESH_POWER_LIGHT_SLEEP:
2189 strcpy(dst, "LIGHT SLEEP");
2190 break;
2191 case NL80211_MESH_POWER_DEEP_SLEEP:
2192 strcpy(dst, "DEEP SLEEP");
2193 break;
2194 default:
2195 strcpy(dst, "UNKNOWN");
2196 break;
2197 }
2198 }
2199
2200 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
2201 {
2202 struct nl80211_array_buf *arr = arg;
2203 struct iwinfo_assoclist_entry *e = arr->buf;
2204 struct nlattr **attr = nl80211_parse(msg);
2205 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
2206 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
2207 struct nl80211_sta_flag_update *sta_flags;
2208
2209 static const struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
2210 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
2211 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
2212 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
2213 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
2214 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
2215 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
2216 [NL80211_STA_INFO_SIGNAL_AVG] = { .type = NLA_U8 },
2217 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
2218 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
2219 [NL80211_STA_INFO_RX_BYTES64] = { .type = NLA_U64 },
2220 [NL80211_STA_INFO_TX_BYTES64] = { .type = NLA_U64 },
2221 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 },
2222 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
2223 [NL80211_STA_INFO_CONNECTED_TIME]= { .type = NLA_U32 },
2224 [NL80211_STA_INFO_RX_DROP_MISC] = { .type = NLA_U64 },
2225 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 },
2226 [NL80211_STA_INFO_STA_FLAGS] =
2227 { .minlen = sizeof(struct nl80211_sta_flag_update) },
2228 [NL80211_STA_INFO_EXPECTED_THROUGHPUT] = { .type = NLA_U32 },
2229 /* mesh */
2230 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
2231 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
2232 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
2233 [NL80211_STA_INFO_LOCAL_PM] = { .type = NLA_U32 },
2234 [NL80211_STA_INFO_PEER_PM] = { .type = NLA_U32 },
2235 [NL80211_STA_INFO_NONPEER_PM] = { .type = NLA_U32 },
2236 };
2237
2238 static const struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
2239 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
2240 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
2241 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
2242 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
2243 };
2244
2245 /* advance to end of array */
2246 e += arr->count;
2247 memset(e, 0, sizeof(*e));
2248
2249 if (attr[NL80211_ATTR_MAC])
2250 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
2251
2252 if (attr[NL80211_ATTR_STA_INFO] &&
2253 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
2254 attr[NL80211_ATTR_STA_INFO], stats_policy))
2255 {
2256 if (sinfo[NL80211_STA_INFO_SIGNAL])
2257 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
2258
2259 if (sinfo[NL80211_STA_INFO_SIGNAL_AVG])
2260 e->signal_avg = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]);
2261
2262 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
2263 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
2264
2265 if (sinfo[NL80211_STA_INFO_CONNECTED_TIME])
2266 e->connected_time = nla_get_u32(sinfo[NL80211_STA_INFO_CONNECTED_TIME]);
2267
2268 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
2269 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
2270
2271 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
2272 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
2273
2274 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
2275 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
2276 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
2277 nl80211_parse_rateinfo(rinfo, &e->rx_rate);
2278
2279 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
2280 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
2281 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
2282 nl80211_parse_rateinfo(rinfo, &e->tx_rate);
2283
2284 if (sinfo[NL80211_STA_INFO_RX_BYTES64])
2285 e->rx_bytes = nla_get_u64(sinfo[NL80211_STA_INFO_RX_BYTES64]);
2286 else if (sinfo[NL80211_STA_INFO_RX_BYTES])
2287 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
2288
2289 if (sinfo[NL80211_STA_INFO_TX_BYTES64])
2290 e->tx_bytes = nla_get_u64(sinfo[NL80211_STA_INFO_TX_BYTES64]);
2291 else if (sinfo[NL80211_STA_INFO_TX_BYTES])
2292 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
2293
2294 if (sinfo[NL80211_STA_INFO_TX_RETRIES])
2295 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
2296
2297 if (sinfo[NL80211_STA_INFO_TX_FAILED])
2298 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
2299
2300 if (sinfo[NL80211_STA_INFO_T_OFFSET])
2301 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]);
2302
2303 if (sinfo[NL80211_STA_INFO_RX_DROP_MISC])
2304 e->rx_drop_misc = nla_get_u64(sinfo[NL80211_STA_INFO_RX_DROP_MISC]);
2305
2306 if (sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT])
2307 e->thr = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]);
2308
2309 /* mesh */
2310 if (sinfo[NL80211_STA_INFO_LLID])
2311 e->llid = nla_get_u16(sinfo[NL80211_STA_INFO_LLID]);
2312
2313 if (sinfo[NL80211_STA_INFO_PLID])
2314 e->plid = nla_get_u16(sinfo[NL80211_STA_INFO_PLID]);
2315
2316 if (sinfo[NL80211_STA_INFO_PLINK_STATE])
2317 plink_state_to_str(e->plink_state,
2318 nla_get_u8(sinfo[NL80211_STA_INFO_PLINK_STATE]));
2319
2320 if (sinfo[NL80211_STA_INFO_LOCAL_PM])
2321 power_mode_to_str(e->local_ps, sinfo[NL80211_STA_INFO_LOCAL_PM]);
2322 if (sinfo[NL80211_STA_INFO_PEER_PM])
2323 power_mode_to_str(e->peer_ps, sinfo[NL80211_STA_INFO_PEER_PM]);
2324 if (sinfo[NL80211_STA_INFO_NONPEER_PM])
2325 power_mode_to_str(e->nonpeer_ps, sinfo[NL80211_STA_INFO_NONPEER_PM]);
2326
2327 /* Station flags */
2328 if (sinfo[NL80211_STA_INFO_STA_FLAGS])
2329 {
2330 sta_flags = (struct nl80211_sta_flag_update *)
2331 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
2332
2333 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
2334 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
2335 e->is_authorized = 1;
2336
2337 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
2338 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
2339 e->is_authenticated = 1;
2340
2341 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
2342 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
2343 e->is_preamble_short = 1;
2344
2345 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
2346 sta_flags->set & BIT(NL80211_STA_FLAG_WME))
2347 e->is_wme = 1;
2348
2349 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
2350 sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
2351 e->is_mfp = 1;
2352
2353 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
2354 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2355 e->is_tdls = 1;
2356 }
2357 }
2358
2359 e->noise = 0; /* filled in by caller */
2360 arr->count++;
2361
2362 return NL_SKIP;
2363 }
2364
2365 static int nl80211_get_survey(const char *ifname, char *buf, int *len)
2366 {
2367 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2368 int rc;
2369
2370 rc = nl80211_request(ifname, NL80211_CMD_GET_SURVEY,
2371 NLM_F_DUMP, nl80211_get_survey_cb, &arr);
2372 if (!rc)
2373 *len = (arr.count * sizeof(struct iwinfo_survey_entry));
2374 else
2375 *len = 0;
2376
2377 return 0;
2378 }
2379
2380 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
2381 {
2382 DIR *d;
2383 int i, noise = 0;
2384 struct dirent *de;
2385 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2386 struct iwinfo_assoclist_entry *e;
2387
2388 if ((d = opendir("/sys/class/net")) != NULL)
2389 {
2390 while ((de = readdir(d)) != NULL)
2391 {
2392 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
2393 (!de->d_name[strlen(ifname)] ||
2394 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
2395 {
2396 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
2397 NLM_F_DUMP, nl80211_get_assoclist_cb, &arr);
2398 }
2399 }
2400
2401 closedir(d);
2402
2403 if (!nl80211_get_noise(ifname, &noise))
2404 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
2405 e->noise = noise;
2406
2407 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
2408 return 0;
2409 }
2410
2411 return -1;
2412 }
2413
2414 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
2415 {
2416 int *dbm_max = arg;
2417 int ch_cur, ch_cmp, bands_remain, freqs_remain;
2418
2419 struct nlattr **attr = nl80211_parse(msg);
2420 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2421 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2422 struct nlattr *band, *freq;
2423
2424 static const struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2425 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2426 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2427 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2428 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2429 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2430 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2431 };
2432
2433 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
2434 *dbm_max = -1;
2435
2436 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2437 {
2438 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
2439 nla_len(band), NULL);
2440
2441 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2442 {
2443 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2444 nla_data(freq), nla_len(freq), freq_policy);
2445
2446 ch_cmp = nl80211_freq2channel(nla_get_u32(
2447 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
2448
2449 if ((!ch_cur || (ch_cmp == ch_cur)) &&
2450 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
2451 {
2452 *dbm_max = (int)(0.01 * nla_get_u32(
2453 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
2454
2455 break;
2456 }
2457 }
2458 }
2459
2460 return NL_SKIP;
2461 }
2462
2463 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
2464 {
2465 int err, ch_cur;
2466 int dbm_max = -1, dbm_cur, dbm_cnt;
2467 struct iwinfo_txpwrlist_entry entry;
2468
2469 if (nl80211_get_channel(ifname, &ch_cur))
2470 ch_cur = 0;
2471
2472 /* initialize the value pointer with channel for callback */
2473 dbm_max = ch_cur;
2474
2475 err = nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2476 nl80211_get_txpwrlist_cb, &dbm_max);
2477
2478 if (!err)
2479 {
2480 for (dbm_cur = 0, dbm_cnt = 0;
2481 dbm_cur < dbm_max;
2482 dbm_cur++, dbm_cnt++)
2483 {
2484 entry.dbm = dbm_cur;
2485 entry.mw = iwinfo_dbm2mw(dbm_cur);
2486
2487 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2488 }
2489
2490 entry.dbm = dbm_max;
2491 entry.mw = iwinfo_dbm2mw(dbm_max);
2492
2493 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2494 dbm_cnt++;
2495
2496 *len = dbm_cnt * sizeof(entry);
2497 return 0;
2498 }
2499
2500 return -1;
2501 }
2502
2503 static void nl80211_get_scancrypto(char *spec, struct iwinfo_crypto_entry *c)
2504 {
2505 int wpa_version = 0;
2506 char *p, *q, *proto, *suites;
2507
2508 c->enabled = 0;
2509
2510 for (p = strtok_r(spec, "[]", &q); p; p = strtok_r(NULL, "[]", &q)) {
2511 if (!strcmp(p, "WEP")) {
2512 c->enabled = 1;
2513 c->auth_suites = IWINFO_KMGMT_NONE;
2514 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2515 c->pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2516 break;
2517 }
2518
2519 proto = strtok(p, "-");
2520 suites = strtok(NULL, "]");
2521
2522 if (!proto || !suites)
2523 continue;
2524
2525 if (!strcmp(proto, "WPA2") || !strcmp(proto, "RSN"))
2526 wpa_version = 2;
2527 else if (!strcmp(proto, "WPA"))
2528 wpa_version = 1;
2529 else
2530 continue;
2531
2532 c->enabled = 1;
2533
2534 parse_wpa_suites(suites, wpa_version, &c->wpa_version, &c->auth_suites);
2535 parse_wpa_ciphers(suites, &c->pair_ciphers);
2536 }
2537 }
2538
2539
2540 struct nl80211_scanlist {
2541 struct iwinfo_scanlist_entry *e;
2542 int len;
2543 };
2544
2545
2546 static void nl80211_get_scanlist_ie(struct nlattr **bss,
2547 struct iwinfo_scanlist_entry *e)
2548 {
2549 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2550 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2551 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
2552 int len;
2553
2554 while (ielen >= 2 && ielen >= ie[1])
2555 {
2556 switch (ie[0])
2557 {
2558 case 0: /* SSID */
2559 case 114: /* Mesh ID */
2560 if (e->ssid[0] == 0) {
2561 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
2562 memcpy(e->ssid, ie + 2, len);
2563 e->ssid[len] = 0;
2564 }
2565 break;
2566
2567 case 48: /* RSN */
2568 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
2569 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
2570 break;
2571
2572 case 221: /* Vendor */
2573 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
2574 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
2575 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
2576 break;
2577 case 61: /* HT operation */
2578 if (ie[1] >= 3) {
2579 e->ht_chan_info.primary_chan = ie[2];
2580 e->ht_chan_info.secondary_chan_off = ie[3] & 0x3;
2581 e->ht_chan_info.chan_width = (ie[4] & 0x4)>>2;
2582 }
2583 break;
2584 case 192: /* VHT operation */
2585 if (ie[1] >= 3) {
2586 e->vht_chan_info.chan_width = ie[2];
2587 e->vht_chan_info.center_chan_1 = ie[3];
2588 e->vht_chan_info.center_chan_2 = ie[4];
2589 }
2590 break;
2591 }
2592
2593 ielen -= ie[1] + 2;
2594 ie += ie[1] + 2;
2595 }
2596 }
2597
2598 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
2599 {
2600 int8_t rssi;
2601 uint16_t caps;
2602
2603 struct nl80211_scanlist *sl = arg;
2604 struct nlattr **tb = nl80211_parse(msg);
2605 struct nlattr *bss[NL80211_BSS_MAX + 1];
2606
2607 static const struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2608 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2609 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2610 [NL80211_BSS_BSSID] = { 0 },
2611 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2612 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2613 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
2614 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2615 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2616 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2617 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2618 [NL80211_BSS_BEACON_IES] = { 0 },
2619 };
2620
2621 if (!tb[NL80211_ATTR_BSS] ||
2622 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2623 bss_policy) ||
2624 !bss[NL80211_BSS_BSSID])
2625 {
2626 return NL_SKIP;
2627 }
2628
2629 if (bss[NL80211_BSS_CAPABILITY])
2630 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2631 else
2632 caps = 0;
2633
2634 memset(sl->e, 0, sizeof(*sl->e));
2635 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
2636
2637 if (caps & (1<<1))
2638 sl->e->mode = IWINFO_OPMODE_ADHOC;
2639 else if (caps & (1<<0))
2640 sl->e->mode = IWINFO_OPMODE_MASTER;
2641 else
2642 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
2643
2644 if (caps & (1<<4))
2645 sl->e->crypto.enabled = 1;
2646
2647 if (bss[NL80211_BSS_FREQUENCY])
2648 {
2649 sl->e->mhz = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
2650 sl->e->band = nl80211_freq2band(sl->e->mhz);
2651 sl->e->channel = nl80211_freq2channel(sl->e->mhz);
2652 }
2653
2654 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
2655 nl80211_get_scanlist_ie(bss, sl->e);
2656
2657 if (bss[NL80211_BSS_SIGNAL_MBM])
2658 {
2659 sl->e->signal =
2660 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
2661
2662 rssi = sl->e->signal - 0x100;
2663
2664 if (rssi < -110)
2665 rssi = -110;
2666 else if (rssi > -40)
2667 rssi = -40;
2668
2669 sl->e->quality = (rssi + 110);
2670 sl->e->quality_max = 70;
2671 }
2672
2673 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
2674 {
2675 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2676 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2677 }
2678
2679 sl->e++;
2680 sl->len++;
2681
2682 return NL_SKIP;
2683 }
2684
2685 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
2686 {
2687 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
2688
2689 if (nl80211_request(ifname, NL80211_CMD_TRIGGER_SCAN, 0, NULL, NULL))
2690 goto out;
2691
2692 if (nl80211_wait("nl80211", "scan",
2693 NL80211_CMD_NEW_SCAN_RESULTS, NL80211_CMD_SCAN_ABORTED))
2694 goto out;
2695
2696 if (nl80211_request(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
2697 nl80211_get_scanlist_cb, &sl))
2698 goto out;
2699
2700 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
2701 return 0;
2702
2703 out:
2704 *len = 0;
2705 return -1;
2706 }
2707
2708 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
2709 {
2710 #define hex(x) \
2711 (((x) >= 'a') ? ((x) - 'a' + 10) : \
2712 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0')))
2713
2714 int len = 0;
2715
2716 while (*in)
2717 {
2718 if (len + 1 >= outlen)
2719 break;
2720
2721 switch (*in)
2722 {
2723 case '\\':
2724 in++;
2725 switch (*in)
2726 {
2727 case 'n':
2728 out[len++] = '\n'; in++;
2729 break;
2730
2731 case 'r':
2732 out[len++] = '\r'; in++;
2733 break;
2734
2735 case 't':
2736 out[len++] = '\t'; in++;
2737 break;
2738
2739 case 'e':
2740 out[len++] = '\033'; in++;
2741 break;
2742
2743 case 'x':
2744 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
2745 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
2746 in += 3;
2747 break;
2748
2749 default:
2750 out[len++] = *in++;
2751 break;
2752 }
2753 break;
2754
2755 default:
2756 out[len++] = *in++;
2757 break;
2758 }
2759 }
2760
2761 if (outlen > len)
2762 out[len] = '\0';
2763
2764 return len;
2765 }
2766
2767 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len)
2768 {
2769 int sock, qmax, rssi, tries, count = -1, ready = 0;
2770 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096];
2771 struct sockaddr_un local = { 0 };
2772 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
2773
2774 sock = nl80211_wpactl_connect(ifname, &local);
2775
2776 if (sock < 0)
2777 return sock;
2778
2779 send(sock, "ATTACH", 6, 0);
2780 send(sock, "SCAN", 4, 0);
2781
2782 /*
2783 * wait for scan results:
2784 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan
2785 * 72 channels at most. We'll also receive two "OK" messages acknowledging
2786 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra
2787 * time to process the results, so try 72 + 2 + 1 times.
2788 */
2789 for (tries = 0; tries < 75; tries++)
2790 {
2791 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0)
2792 continue;
2793
2794 /* got an event notification */
2795 if (reply[0] == '<')
2796 {
2797 /* scan results are ready */
2798 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS"))
2799 {
2800 /* send "SCAN_RESULTS" command */
2801 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12);
2802 break;
2803 }
2804
2805 /* is another unrelated event, retry */
2806 tries--;
2807 }
2808
2809 /* scanning already in progress, keep awaiting results */
2810 else if (!strcmp(reply, "FAIL-BUSY\n"))
2811 {
2812 tries--;
2813 }
2814
2815 /* another failure, abort */
2816 else if (!strncmp(reply, "FAIL-", 5))
2817 {
2818 break;
2819 }
2820 }
2821
2822 /* receive and parse scan results if the wait above didn't time out */
2823 while (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
2824 {
2825 /* received an event notification, receive again */
2826 if (reply[0] == '<')
2827 continue;
2828
2829 nl80211_get_quality_max(ifname, &qmax);
2830
2831 for (line = strtok_r(reply, "\n", &pos);
2832 line != NULL;
2833 line = strtok_r(NULL, "\n", &pos))
2834 {
2835 /* skip header line */
2836 if (count < 0)
2837 {
2838 count++;
2839 continue;
2840 }
2841
2842 bssid = strtok(line, "\t");
2843 freq = strtok(NULL, "\t");
2844 signal = strtok(NULL, "\t");
2845 flags = strtok(NULL, "\t");
2846 ssid = strtok(NULL, "\n");
2847
2848 if (!bssid || !freq || !signal || !flags)
2849 continue;
2850
2851 /* BSSID */
2852 e->mac[0] = strtol(&bssid[0], NULL, 16);
2853 e->mac[1] = strtol(&bssid[3], NULL, 16);
2854 e->mac[2] = strtol(&bssid[6], NULL, 16);
2855 e->mac[3] = strtol(&bssid[9], NULL, 16);
2856 e->mac[4] = strtol(&bssid[12], NULL, 16);
2857 e->mac[5] = strtol(&bssid[15], NULL, 16);
2858
2859 /* SSID */
2860 if (ssid)
2861 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2862 else
2863 e->ssid[0] = 0;
2864
2865 /* Mode */
2866 if (strstr(flags, "[MESH]"))
2867 e->mode = IWINFO_OPMODE_MESHPOINT;
2868 else if (strstr(flags, "[IBSS]"))
2869 e->mode = IWINFO_OPMODE_ADHOC;
2870 else
2871 e->mode = IWINFO_OPMODE_MASTER;
2872
2873 /* Channel */
2874 e->mhz = atoi(freq);
2875 e->band = nl80211_freq2band(e->mhz);
2876 e->channel = nl80211_freq2channel(e->mhz);
2877
2878 /* Signal */
2879 rssi = atoi(signal);
2880 e->signal = rssi;
2881
2882 /* Quality */
2883 if (rssi < 0)
2884 {
2885 /* The cfg80211 wext compat layer assumes a signal range
2886 * of -110 dBm to -40 dBm, the quality value is derived
2887 * by adding 110 to the signal level */
2888 if (rssi < -110)
2889 rssi = -110;
2890 else if (rssi > -40)
2891 rssi = -40;
2892
2893 e->quality = (rssi + 110);
2894 }
2895 else
2896 {
2897 e->quality = rssi;
2898 }
2899
2900 /* Max. Quality */
2901 e->quality_max = qmax;
2902
2903 /* Crypto */
2904 nl80211_get_scancrypto(flags, &e->crypto);
2905
2906 count++;
2907 e++;
2908 }
2909
2910 *len = count * sizeof(struct iwinfo_scanlist_entry);
2911 break;
2912 }
2913
2914 close(sock);
2915 unlink(local.sun_path);
2916
2917 return (count >= 0) ? 0 : -1;
2918 }
2919
2920 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
2921 {
2922 char *res;
2923 int rv, mode;
2924
2925 *len = 0;
2926
2927 /* Got a radioX pseudo interface, find some interface on it or create one */
2928 if (!strncmp(ifname, "radio", 5))
2929 {
2930 /* Reuse existing interface */
2931 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2932 {
2933 return nl80211_get_scanlist(res, buf, len);
2934 }
2935
2936 /* Need to spawn a temporary iface for scanning */
2937 else if ((res = nl80211_ifadd(ifname)) != NULL)
2938 {
2939 rv = nl80211_get_scanlist(res, buf, len);
2940 nl80211_ifdel(res);
2941 return rv;
2942 }
2943 }
2944
2945 /* WPA supplicant */
2946 if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
2947 {
2948 return 0;
2949 }
2950
2951 /* station / ad-hoc / monitor scan */
2952 else if (!nl80211_get_mode(ifname, &mode) &&
2953 (mode == IWINFO_OPMODE_ADHOC ||
2954 mode == IWINFO_OPMODE_MASTER ||
2955 mode == IWINFO_OPMODE_CLIENT ||
2956 mode == IWINFO_OPMODE_MONITOR) &&
2957 iwinfo_ifup(ifname))
2958 {
2959 return nl80211_get_scanlist_nl(ifname, buf, len);
2960 }
2961
2962 /* AP scan */
2963 else
2964 {
2965 /* Got a temp interface, don't create yet another one */
2966 if (!strncmp(ifname, "tmp.", 4))
2967 {
2968 if (!iwinfo_ifup(ifname))
2969 return -1;
2970
2971 rv = nl80211_get_scanlist_nl(ifname, buf, len);
2972 iwinfo_ifdown(ifname);
2973 return rv;
2974 }
2975
2976 /* Spawn a new scan interface */
2977 else
2978 {
2979 if (!(res = nl80211_ifadd(ifname)))
2980 return -1;
2981
2982 iwinfo_ifmac(res);
2983
2984 /* if we can take the new interface up, the driver supports an
2985 * additional interface and there's no need to tear down the ap */
2986 if (iwinfo_ifup(res))
2987 {
2988 rv = nl80211_get_scanlist_nl(res, buf, len);
2989 iwinfo_ifdown(res);
2990 }
2991
2992 /* driver cannot create secondary interface, take down ap
2993 * during scan */
2994 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2995 {
2996 rv = nl80211_get_scanlist_nl(res, buf, len);
2997 iwinfo_ifdown(res);
2998 iwinfo_ifup(ifname);
2999 nl80211_hostapd_hup(ifname);
3000 }
3001 else
3002 rv = -1;
3003
3004 nl80211_ifdel(res);
3005 return rv;
3006 }
3007 }
3008
3009 return -1;
3010 }
3011
3012 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
3013 {
3014 int bands_remain, freqs_remain;
3015
3016 struct nl80211_array_buf *arr = arg;
3017 struct iwinfo_freqlist_entry *e;
3018
3019 struct nlattr **attr = nl80211_parse(msg);
3020 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
3021 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
3022 struct nlattr *band, *freq;
3023
3024 e = arr->buf;
3025 e += arr->count;
3026
3027 if (attr[NL80211_ATTR_WIPHY_BANDS]) {
3028 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
3029 {
3030 nla_parse(bands, NL80211_BAND_ATTR_MAX,
3031 nla_data(band), nla_len(band), NULL);
3032
3033 if (bands[NL80211_BAND_ATTR_FREQS]) {
3034 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
3035 {
3036 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
3037 nla_data(freq), nla_len(freq), NULL);
3038
3039 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
3040 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
3041 continue;
3042
3043 e->band = nl80211_get_band(band->nla_type);
3044 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
3045 e->channel = nl80211_freq2channel(e->mhz);
3046
3047 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_MINUS])
3048 e->flags |= IWINFO_FREQ_NO_HT40MINUS;
3049 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_PLUS])
3050 e->flags |= IWINFO_FREQ_NO_HT40PLUS;
3051 if (freqs[NL80211_FREQUENCY_ATTR_NO_80MHZ])
3052 e->flags |= IWINFO_FREQ_NO_80MHZ;
3053 if (freqs[NL80211_FREQUENCY_ATTR_NO_160MHZ])
3054 e->flags |= IWINFO_FREQ_NO_160MHZ;
3055 if (freqs[NL80211_FREQUENCY_ATTR_NO_20MHZ])
3056 e->flags |= IWINFO_FREQ_NO_20MHZ;
3057 if (freqs[NL80211_FREQUENCY_ATTR_NO_10MHZ])
3058 e->flags |= IWINFO_FREQ_NO_10MHZ;
3059 if (freqs[NL80211_FREQUENCY_ATTR_NO_HE])
3060 e->flags |= IWINFO_FREQ_NO_HE;
3061 if (freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
3062 !freqs[NL80211_FREQUENCY_ATTR_RADAR])
3063 e->flags |= IWINFO_FREQ_NO_IR;
3064 if (freqs[NL80211_FREQUENCY_ATTR_INDOOR_ONLY])
3065 e->flags |= IWINFO_FREQ_INDOOR_ONLY;
3066
3067 /* keep backwards compatibility */
3068 e->restricted = (e->flags & IWINFO_FREQ_NO_IR) ? 1 : 0;
3069
3070 e++;
3071 arr->count++;
3072 }
3073 }
3074 }
3075 }
3076
3077 return NL_SKIP;
3078 }
3079
3080 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
3081 {
3082 struct nl80211_msg_conveyor *cv;
3083 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
3084 uint32_t features = nl80211_get_protocol_features(ifname);
3085 int flags;
3086
3087 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
3088 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
3089 if (!cv)
3090 goto out;
3091
3092 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
3093 if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr))
3094 goto out;
3095
3096 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
3097 return 0;
3098
3099 nla_put_failure:
3100 nl80211_free(cv);
3101 out:
3102 *len = 0;
3103 return -1;
3104 }
3105
3106 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
3107 {
3108 char *buf = arg;
3109 struct nlattr **attr = nl80211_parse(msg);
3110
3111 if (attr[NL80211_ATTR_REG_ALPHA2])
3112 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
3113 else
3114 buf[0] = 0;
3115
3116 return NL_SKIP;
3117 }
3118
3119 static int nl80211_get_country(const char *ifname, char *buf)
3120 {
3121 if (nl80211_request(ifname, NL80211_CMD_GET_REG, 0,
3122 nl80211_get_country_cb, buf))
3123 return -1;
3124
3125 return 0;
3126 }
3127
3128 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
3129 {
3130 int count;
3131 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
3132 const struct iwinfo_iso3166_label *l;
3133
3134 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
3135 {
3136 e->iso3166 = l->iso3166;
3137 e->ccode[0] = (l->iso3166 / 256);
3138 e->ccode[1] = (l->iso3166 % 256);
3139 e->ccode[2] = 0;
3140 }
3141
3142 *len = (count * sizeof(struct iwinfo_country_entry));
3143 return 0;
3144 }
3145
3146
3147 struct nl80211_modes
3148 {
3149 bool ok;
3150 uint32_t hw;
3151 uint32_t ht;
3152
3153 uint8_t bands;
3154
3155 uint16_t nl_ht;
3156 uint32_t nl_vht;
3157 uint16_t he_phy_cap[6];
3158 };
3159
3160 static void nl80211_eval_modelist(struct nl80211_modes *m)
3161 {
3162 /* Treat any nonzero capability as 11n */
3163 if (m->nl_ht > 0)
3164 {
3165 m->hw |= IWINFO_80211_N;
3166 m->ht |= IWINFO_HTMODE_HT20;
3167
3168 if (m->nl_ht & (1 << 1))
3169 m->ht |= IWINFO_HTMODE_HT40;
3170 }
3171
3172 if (m->he_phy_cap[0] != 0) {
3173 m->hw |= IWINFO_80211_AX;
3174 m->ht |= IWINFO_HTMODE_HE20;
3175
3176 if (m->he_phy_cap[0] & BIT(9))
3177 m->ht |= IWINFO_HTMODE_HE40;
3178 if (m->he_phy_cap[0] & BIT(10))
3179 m->ht |= IWINFO_HTMODE_HE40 | IWINFO_HTMODE_HE80;
3180 if (m->he_phy_cap[0] & BIT(11))
3181 m->ht |= IWINFO_HTMODE_HE160;
3182 if (m->he_phy_cap[0] & BIT(12))
3183 m->ht |= IWINFO_HTMODE_HE160 | IWINFO_HTMODE_HE80_80;
3184 }
3185
3186 if (m->bands & IWINFO_BAND_24)
3187 {
3188 m->hw |= IWINFO_80211_B;
3189 m->hw |= IWINFO_80211_G;
3190 }
3191
3192 if (m->bands & IWINFO_BAND_5)
3193 {
3194 /* Treat any nonzero capability as 11ac */
3195 if (m->nl_vht > 0)
3196 {
3197 m->hw |= IWINFO_80211_AC;
3198 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
3199
3200 switch ((m->nl_vht >> 2) & 3)
3201 {
3202 case 2:
3203 m->ht |= IWINFO_HTMODE_VHT80_80;
3204 /* fall through */
3205
3206 case 1:
3207 m->ht |= IWINFO_HTMODE_VHT160;
3208 }
3209 }
3210 else
3211 {
3212 m->hw |= IWINFO_80211_A;
3213 }
3214 }
3215
3216 if (m->bands & IWINFO_BAND_60)
3217 {
3218 m->hw |= IWINFO_80211_AD;
3219 }
3220
3221 }
3222
3223 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
3224 {
3225 struct nl80211_modes *m = arg;
3226 int bands_remain;
3227 struct nlattr **attr = nl80211_parse(msg);
3228 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
3229 struct nlattr *band;
3230
3231 if (attr[NL80211_ATTR_WIPHY_BANDS])
3232 {
3233 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
3234 {
3235 m->bands |= nl80211_get_band(band->nla_type);
3236
3237 nla_parse(bands, NL80211_BAND_ATTR_MAX,
3238 nla_data(band), nla_len(band), NULL);
3239
3240 if (bands[NL80211_BAND_ATTR_HT_CAPA])
3241 m->nl_ht = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
3242
3243 if (bands[NL80211_BAND_ATTR_VHT_CAPA])
3244 m->nl_vht = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
3245
3246 if (bands[NL80211_BAND_ATTR_IFTYPE_DATA]) {
3247 struct nlattr *tb[NL80211_BAND_IFTYPE_ATTR_MAX + 1];
3248 struct nlattr *nl_iftype;
3249 int rem_band;
3250 int len;
3251
3252 nla_for_each_nested(nl_iftype, bands[NL80211_BAND_ATTR_IFTYPE_DATA], rem_band) {
3253 nla_parse(tb, NL80211_BAND_IFTYPE_ATTR_MAX,
3254 nla_data(nl_iftype), nla_len(nl_iftype), NULL);
3255 if (tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]) {
3256 len = nla_len(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]);
3257
3258 if (len > sizeof(m->he_phy_cap) - 1)
3259 len = sizeof(m->he_phy_cap) - 1;
3260 memcpy(&((__u8 *)m->he_phy_cap)[1],
3261 nla_data(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]),
3262 len);
3263 }
3264 }
3265 }
3266 }
3267
3268 m->ok = 1;
3269 }
3270
3271 return NL_SKIP;
3272 }
3273
3274 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
3275 {
3276 struct nl80211_msg_conveyor *cv;
3277 struct nl80211_modes m = {};
3278 uint32_t features = nl80211_get_protocol_features(ifname);
3279 int flags;
3280
3281 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
3282 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
3283 if (!cv)
3284 goto out;
3285
3286 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
3287 if (nl80211_send(cv, nl80211_get_modelist_cb, &m))
3288 goto nla_put_failure;
3289
3290 nl80211_eval_modelist(&m);
3291
3292 *buf = m.hw;
3293
3294 return 0;
3295
3296 nla_put_failure:
3297 nl80211_free(cv);
3298 out:
3299 return -1;
3300 }
3301
3302 struct chan_info {
3303 int width;
3304 int mode;
3305 };
3306
3307 static int nl80211_get_htmode_cb(struct nl_msg *msg, void *arg)
3308 {
3309 struct nlattr **tb = nl80211_parse(msg);
3310 struct nlattr *cur;
3311 struct chan_info *chn = arg;
3312
3313 if ((cur = tb[NL80211_ATTR_CHANNEL_WIDTH]))
3314 chn->width = nla_get_u32(cur);
3315
3316 if ((cur = tb[NL80211_ATTR_BSS_HT_OPMODE]))
3317 chn->mode = nla_get_u32(cur);
3318
3319 return NL_SKIP;
3320 }
3321
3322 static int nl80211_get_htmode(const char *ifname, int *buf)
3323 {
3324 struct chan_info chn = { 0 };
3325 char *res, b[2] = { 0 };
3326 int err;
3327 bool he = false;
3328
3329 res = nl80211_phy2ifname(ifname);
3330 *buf = 0;
3331
3332 err = nl80211_request(res ? res : ifname,
3333 NL80211_CMD_GET_INTERFACE, 0,
3334 nl80211_get_htmode_cb, &chn);
3335 if (err)
3336 return -1;
3337
3338 if (nl80211_hostapd_query(res ? res : ifname, "ieee80211ax", b, sizeof(b)))
3339 he = b[0] == '1';
3340 else if (nl80211_wpactl_query(res ? res : ifname, "wifi_generation", b, sizeof(b)))
3341 he = b[0] == '6';
3342
3343 switch (chn.width) {
3344 case NL80211_CHAN_WIDTH_20:
3345 if (he)
3346 *buf = IWINFO_HTMODE_HE20;
3347 else if (chn.mode == -1)
3348 *buf = IWINFO_HTMODE_VHT20;
3349 else
3350 *buf = IWINFO_HTMODE_HT20;
3351 break;
3352 case NL80211_CHAN_WIDTH_40:
3353 if (he)
3354 *buf = IWINFO_HTMODE_HE40;
3355 else if (chn.mode == -1)
3356 *buf = IWINFO_HTMODE_VHT40;
3357 else
3358 *buf = IWINFO_HTMODE_HT40;
3359 break;
3360 case NL80211_CHAN_WIDTH_80:
3361 if (he)
3362 *buf = IWINFO_HTMODE_HE80;
3363 else
3364 *buf = IWINFO_HTMODE_VHT80;
3365 break;
3366 case NL80211_CHAN_WIDTH_80P80:
3367 if (he)
3368 *buf = IWINFO_HTMODE_HE80_80;
3369 else
3370 *buf = IWINFO_HTMODE_VHT80_80;
3371 break;
3372 case NL80211_CHAN_WIDTH_160:
3373 if (he)
3374 *buf = IWINFO_HTMODE_HE160;
3375 else
3376 *buf = IWINFO_HTMODE_VHT160;
3377 break;
3378 case NL80211_CHAN_WIDTH_5:
3379 case NL80211_CHAN_WIDTH_10:
3380 case NL80211_CHAN_WIDTH_20_NOHT:
3381 *buf = IWINFO_HTMODE_NOHT;
3382 break;
3383 default:
3384 return -1;
3385 }
3386
3387 return 0;
3388 }
3389
3390 static int nl80211_get_htmodelist(const char *ifname, int *buf)
3391 {
3392 struct nl80211_msg_conveyor *cv;
3393 struct nl80211_modes m = {};
3394 uint32_t features = nl80211_get_protocol_features(ifname);
3395 int flags;
3396
3397 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
3398 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
3399 if (!cv)
3400 goto out;
3401
3402 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
3403 if (nl80211_send(cv, nl80211_get_modelist_cb, &m))
3404 goto nla_put_failure;
3405
3406 nl80211_eval_modelist(&m);
3407
3408 *buf = m.ht;
3409
3410 return 0;
3411
3412 nla_put_failure:
3413 nl80211_free(cv);
3414 out:
3415 return -1;
3416 }
3417
3418
3419 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
3420 {
3421 struct nlattr **attr = nl80211_parse(msg);
3422 struct nlattr *comb;
3423 int *ret = arg;
3424 int comb_rem, limit_rem, mode_rem;
3425
3426 *ret = 0;
3427 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
3428 return NL_SKIP;
3429
3430 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
3431 {
3432 static const struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
3433 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
3434 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
3435 };
3436 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1];
3437 static const struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
3438 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
3439 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
3440 };
3441 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1];
3442 struct nlattr *limit;
3443
3444 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy);
3445
3446 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
3447 continue;
3448
3449 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
3450 {
3451 struct nlattr *mode;
3452
3453 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
3454
3455 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
3456 !tb_limit[NL80211_IFACE_LIMIT_MAX])
3457 continue;
3458
3459 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
3460 continue;
3461
3462 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
3463 if (nla_type(mode) == NL80211_IFTYPE_AP)
3464 *ret = 1;
3465 }
3466 }
3467 }
3468
3469 return NL_SKIP;
3470 }
3471
3472 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
3473 {
3474 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
3475 nl80211_get_ifcomb_cb, buf))
3476 return -1;
3477
3478 return 0;
3479 }
3480
3481 static int nl80211_hardware_id_from_fdt(struct iwinfo_hardware_id *id, const char *ifname)
3482 {
3483 char *phy, path[PATH_MAX];
3484
3485 /* Try to determine the phy name from the given interface */
3486 phy = nl80211_ifname2phy(ifname);
3487
3488 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/of_node/compatible",
3489 phy ? "ieee80211" : "net", phy ? phy : ifname);
3490
3491 if (nl80211_readstr(path, id->compatible, sizeof(id->compatible)) <= 0)
3492 return -1;
3493
3494 return 0;
3495 }
3496
3497
3498 static int nl80211_get_hardware_id(const char *ifname, char *buf)
3499 {
3500 struct iwinfo_hardware_id *id = (struct iwinfo_hardware_id *)buf;
3501 char *phy, num[8], path[PATH_MAX];
3502 int i;
3503
3504 struct { const char *path; uint16_t *dest; } lookup[] = {
3505 { "vendor", &id->vendor_id },
3506 { "device", &id->device_id },
3507 { "subsystem_vendor", &id->subsystem_vendor_id },
3508 { "subsystem_device", &id->subsystem_device_id },
3509 { "../idVendor", &id->subsystem_vendor_id },
3510 { "../idProduct", &id->subsystem_device_id }
3511 };
3512
3513 memset(id, 0, sizeof(*id));
3514
3515 /* Try to determine the phy name from the given interface */
3516 phy = nl80211_ifname2phy(ifname);
3517
3518 for (i = 0; i < ARRAY_SIZE(lookup); i++)
3519 {
3520 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/%s",
3521 phy ? "ieee80211" : "net",
3522 phy ? phy : ifname, lookup[i].path);
3523
3524 if (nl80211_readstr(path, num, sizeof(num)) > 0)
3525 *lookup[i].dest = strtoul(num, NULL, 16);
3526 }
3527
3528 /* Failed to obtain hardware PCI/USB IDs... */
3529 if (id->vendor_id == 0 && id->device_id == 0 &&
3530 id->subsystem_vendor_id == 0 && id->subsystem_device_id == 0)
3531 /* ... first fallback to FDT ... */
3532 if (nl80211_hardware_id_from_fdt(id, ifname) == -1)
3533 /* ... then board config */
3534 return iwinfo_hardware_id_from_mtd(id);
3535
3536 return 0;
3537 }
3538
3539 static const struct iwinfo_hardware_entry *
3540 nl80211_get_hardware_entry(const char *ifname)
3541 {
3542 struct iwinfo_hardware_id id;
3543
3544 if (nl80211_get_hardware_id(ifname, (char *)&id))
3545 return NULL;
3546
3547 return iwinfo_hardware(&id);
3548 }
3549
3550 static int nl80211_get_hardware_name(const char *ifname, char *buf)
3551 {
3552 const struct iwinfo_hardware_entry *hw;
3553
3554 if (!(hw = nl80211_get_hardware_entry(ifname)))
3555 sprintf(buf, "Generic MAC80211");
3556 else
3557 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
3558
3559 return 0;
3560 }
3561
3562 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
3563 {
3564 const struct iwinfo_hardware_entry *hw;
3565
3566 if (!(hw = nl80211_get_hardware_entry(ifname)))
3567 return -1;
3568
3569 *buf = hw->txpower_offset;
3570 return 0;
3571 }
3572
3573 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
3574 {
3575 const struct iwinfo_hardware_entry *hw;
3576
3577 if (!(hw = nl80211_get_hardware_entry(ifname)))
3578 return -1;
3579
3580 *buf = hw->frequency_offset;
3581 return 0;
3582 }
3583
3584 static int nl80211_lookup_phyname(const char *section, char *buf)
3585 {
3586 const char *name;
3587 int idx;
3588
3589 if (!strncmp(section, "path=", 5))
3590 idx = nl80211_phy_idx_from_path(section + 5);
3591 else if (!strncmp(section, "macaddr=", 8))
3592 idx = nl80211_phy_idx_from_macaddr(section + 8);
3593 else
3594 idx = nl80211_phy_idx_from_uci(section);
3595
3596 if (idx < 0)
3597 return -1;
3598
3599 name = nl80211_phyidx2name(idx);
3600 if (!name)
3601 return -1;
3602
3603 strcpy(buf, name);
3604 return 0;
3605 }
3606
3607 static int nl80211_phy_path(const char *phyname, const char **path)
3608 {
3609 if (strchr(phyname, '/'))
3610 return -1;
3611
3612 *path = nl80211_phy_path_str(phyname);
3613 if (!*path)
3614 return -1;
3615
3616 return 0;
3617 }
3618
3619 const struct iwinfo_ops nl80211_ops = {
3620 .name = "nl80211",
3621 .probe = nl80211_probe,
3622 .channel = nl80211_get_channel,
3623 .center_chan1 = nl80211_get_center_chan1,
3624 .center_chan2 = nl80211_get_center_chan2,
3625 .frequency = nl80211_get_frequency,
3626 .frequency_offset = nl80211_get_frequency_offset,
3627 .txpower = nl80211_get_txpower,
3628 .txpower_offset = nl80211_get_txpower_offset,
3629 .bitrate = nl80211_get_bitrate,
3630 .signal = nl80211_get_signal,
3631 .noise = nl80211_get_noise,
3632 .quality = nl80211_get_quality,
3633 .quality_max = nl80211_get_quality_max,
3634 .mbssid_support = nl80211_get_mbssid_support,
3635 .hwmodelist = nl80211_get_hwmodelist,
3636 .htmodelist = nl80211_get_htmodelist,
3637 .htmode = nl80211_get_htmode,
3638 .mode = nl80211_get_mode,
3639 .ssid = nl80211_get_ssid,
3640 .bssid = nl80211_get_bssid,
3641 .country = nl80211_get_country,
3642 .hardware_id = nl80211_get_hardware_id,
3643 .hardware_name = nl80211_get_hardware_name,
3644 .encryption = nl80211_get_encryption,
3645 .phyname = nl80211_get_phyname,
3646 .assoclist = nl80211_get_assoclist,
3647 .txpwrlist = nl80211_get_txpwrlist,
3648 .scanlist = nl80211_get_scanlist,
3649 .freqlist = nl80211_get_freqlist,
3650 .countrylist = nl80211_get_countrylist,
3651 .survey = nl80211_get_survey,
3652 .lookup_phy = nl80211_lookup_phyname,
3653 .phy_path = nl80211_phy_path,
3654 .close = nl80211_close
3655 };
Library for accessing wireless device drivers