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[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 <limits.h>
26 #include <glob.h>
27 #include <fnmatch.h>
28 #include <stdarg.h>
29 #include <stdlib.h>
30
31 #include "iwinfo_nl80211.h"
32
33 #define min(x, y) ((x) < (y)) ? (x) : (y)
34
35 #define BIT(x) (1ULL<<(x))
36
37 static struct nl80211_state *nls = NULL;
38
39 static void nl80211_close(void)
40 {
41 if (nls)
42 {
43 if (nls->nlctrl)
44 genl_family_put(nls->nlctrl);
45
46 if (nls->nl80211)
47 genl_family_put(nls->nl80211);
48
49 if (nls->nl_sock)
50 nl_socket_free(nls->nl_sock);
51
52 if (nls->nl_cache)
53 nl_cache_free(nls->nl_cache);
54
55 free(nls);
56 nls = NULL;
57 }
58 }
59
60 static int nl80211_init(void)
61 {
62 int err, fd;
63
64 if (!nls)
65 {
66 nls = malloc(sizeof(struct nl80211_state));
67 if (!nls) {
68 err = -ENOMEM;
69 goto err;
70 }
71
72 memset(nls, 0, sizeof(*nls));
73
74 nls->nl_sock = nl_socket_alloc();
75 if (!nls->nl_sock) {
76 err = -ENOMEM;
77 goto err;
78 }
79
80 if (genl_connect(nls->nl_sock)) {
81 err = -ENOLINK;
82 goto err;
83 }
84
85 fd = nl_socket_get_fd(nls->nl_sock);
86 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
87 err = -EINVAL;
88 goto err;
89 }
90
91 if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
92 err = -ENOMEM;
93 goto err;
94 }
95
96 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
97 if (!nls->nl80211) {
98 err = -ENOENT;
99 goto err;
100 }
101
102 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
103 if (!nls->nlctrl) {
104 err = -ENOENT;
105 goto err;
106 }
107 }
108
109 return 0;
110
111
112 err:
113 nl80211_close();
114 return err;
115 }
116
117 static int nl80211_readint(const char *path)
118 {
119 int fd;
120 int rv = -1;
121 char buffer[16];
122
123 if ((fd = open(path, O_RDONLY)) > -1)
124 {
125 if (read(fd, buffer, sizeof(buffer)) > 0)
126 rv = atoi(buffer);
127
128 close(fd);
129 }
130
131 return rv;
132 }
133
134 static int nl80211_readstr(const char *path, char *buffer, int length)
135 {
136 int fd;
137 int rv = -1;
138
139 if ((fd = open(path, O_RDONLY)) > -1)
140 {
141 if ((rv = read(fd, buffer, length - 1)) > 0)
142 {
143 if (buffer[rv - 1] == '\n')
144 rv--;
145
146 buffer[rv] = 0;
147 }
148
149 close(fd);
150 }
151
152 return rv;
153 }
154
155
156 static int nl80211_msg_error(struct sockaddr_nl *nla,
157 struct nlmsgerr *err, void *arg)
158 {
159 int *ret = arg;
160 *ret = err->error;
161 return NL_STOP;
162 }
163
164 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
165 {
166 int *ret = arg;
167 *ret = 0;
168 return NL_SKIP;
169 }
170
171 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
172 {
173 int *ret = arg;
174 *ret = 0;
175 return NL_STOP;
176 }
177
178 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
179 {
180 return NL_SKIP;
181 }
182
183 static void nl80211_free(struct nl80211_msg_conveyor *cv)
184 {
185 if (cv)
186 {
187 if (cv->cb)
188 nl_cb_put(cv->cb);
189
190 if (cv->msg)
191 nlmsg_free(cv->msg);
192
193 cv->cb = NULL;
194 cv->msg = NULL;
195 }
196 }
197
198 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
199 int cmd, int flags)
200 {
201 static struct nl80211_msg_conveyor cv;
202
203 struct nl_msg *req = NULL;
204 struct nl_cb *cb = NULL;
205
206 req = nlmsg_alloc();
207 if (!req)
208 goto err;
209
210 cb = nl_cb_alloc(NL_CB_DEFAULT);
211 if (!cb)
212 goto err;
213
214 genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
215
216 cv.msg = req;
217 cv.cb = cb;
218
219 return &cv;
220
221 err:
222 if (req)
223 nlmsg_free(req);
224
225 return NULL;
226 }
227
228 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
229 {
230 if (nl80211_init() < 0)
231 return NULL;
232
233 return nl80211_new(nls->nlctrl, cmd, flags);
234 }
235
236 static const char *nl80211_phy_path_str(const char *phyname)
237 {
238 static char path[PATH_MAX];
239 const char *prefix = "/sys/devices/";
240 int prefix_len = strlen(prefix);
241 int buf_len, offset;
242 struct dirent *e;
243 char buf[128], *link;
244 int phy_id;
245 int seq = 0;
246 DIR *d;
247
248 phy_id = atoi(phyname + 3);
249 buf_len = snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/device", phyname);
250 link = realpath(buf, path);
251 if (!link)
252 return NULL;
253
254 if (strncmp(link, prefix, prefix_len) != 0)
255 return NULL;
256
257 link += prefix_len;
258
259 prefix = "platform/";
260 prefix_len = strlen(prefix);
261 if (!strncmp(link, prefix, prefix_len) && strstr(link, "/pci"))
262 link += prefix_len;
263
264 snprintf(buf + buf_len, sizeof(buf) - buf_len, "/ieee80211");
265 d = opendir(buf);
266 if (!d)
267 return link;
268
269 while ((e = readdir(d)) != NULL) {
270 int cur_id;
271
272 if (strncmp(e->d_name, "phy", 3) != 0)
273 continue;
274
275 cur_id = atoi(e->d_name + 3);
276 if (cur_id >= phy_id)
277 continue;
278
279 seq++;
280 }
281
282 closedir(d);
283
284 if (!seq)
285 return link;
286
287 offset = link - path + strlen(link);
288 snprintf(path + offset, sizeof(path) - offset, "+%d", seq);
289
290 return link;
291 }
292
293 static int nl80211_phy_idx_from_path(const char *path)
294 {
295 char buf[128];
296 struct dirent *e;
297 const char *cur_path;
298 int cur_path_len;
299 int path_len;
300 int idx = -1;
301 DIR *d;
302
303 if (!path)
304 return -1;
305
306 path_len = strlen(path);
307 if (!path_len)
308 return -1;
309
310 d = opendir("/sys/class/ieee80211");
311 if (!d)
312 return -1;
313
314 while ((e = readdir(d)) != NULL) {
315 cur_path = nl80211_phy_path_str(e->d_name);
316 if (!cur_path)
317 continue;
318
319 cur_path_len = strlen(cur_path);
320 if (cur_path_len < path_len)
321 continue;
322
323 if (strcmp(cur_path + cur_path_len - path_len, path) != 0)
324 continue;
325
326 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", e->d_name);
327 idx = nl80211_readint(buf);
328
329 if (idx >= 0)
330 break;
331 }
332
333 closedir(d);
334
335 return idx;
336 }
337
338 static int nl80211_phy_idx_from_macaddr(const char *opt)
339 {
340 char buf[128];
341 int i, idx = -1;
342 glob_t gl;
343
344 if (!opt)
345 return -1;
346
347 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/*"); /**/
348 if (glob(buf, 0, NULL, &gl))
349 return -1;
350
351 for (i = 0; i < gl.gl_pathc; i++)
352 {
353 snprintf(buf, sizeof(buf), "%s/macaddress", gl.gl_pathv[i]);
354 if (nl80211_readstr(buf, buf, sizeof(buf)) <= 0)
355 continue;
356
357 if (fnmatch(opt, buf, FNM_CASEFOLD))
358 continue;
359
360 snprintf(buf, sizeof(buf), "%s/index", gl.gl_pathv[i]);
361 if ((idx = nl80211_readint(buf)) > -1)
362 break;
363 }
364
365 globfree(&gl);
366
367 return idx;
368 }
369
370 static int nl80211_phy_idx_from_phy(const char *opt)
371 {
372 char buf[128];
373
374 if (!opt)
375 return -1;
376
377 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", opt);
378 return nl80211_readint(buf);
379 }
380
381 static int nl80211_phy_idx_from_uci(const char *name)
382 {
383 struct uci_section *s;
384 const char *opt;
385 int idx = -1;
386
387 s = iwinfo_uci_get_radio(name, "mac80211");
388 if (!s)
389 goto out;
390
391 opt = uci_lookup_option_string(uci_ctx, s, "path");
392 idx = nl80211_phy_idx_from_path(opt);
393 if (idx >= 0)
394 goto out;
395
396 opt = uci_lookup_option_string(uci_ctx, s, "macaddr");
397 idx = nl80211_phy_idx_from_macaddr(opt);
398 if (idx >= 0)
399 goto out;
400
401 opt = uci_lookup_option_string(uci_ctx, s, "phy");
402 idx = nl80211_phy_idx_from_phy(opt);
403
404 out:
405 iwinfo_uci_free();
406 return idx;
407 }
408
409 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
410 int cmd, int flags)
411 {
412 unsigned int ifidx = 0;
413 int phyidx = -1;
414 struct nl80211_msg_conveyor *cv;
415
416 if (ifname == NULL)
417 return NULL;
418
419 if (nl80211_init() < 0)
420 return NULL;
421
422 if (!strncmp(ifname, "mon.", 4))
423 ifidx = if_nametoindex(&ifname[4]);
424 else
425 ifidx = if_nametoindex(ifname);
426
427 if (!ifidx) {
428 phyidx = nl80211_phy_idx_from_phy(ifname);
429 if (phyidx < 0)
430 phyidx = nl80211_phy_idx_from_uci(ifname);
431 }
432
433 /* Valid ifidx must be greater than 0 */
434 if ((ifidx <= 0) && (phyidx < 0))
435 return NULL;
436
437 cv = nl80211_new(nls->nl80211, cmd, flags);
438 if (!cv)
439 return NULL;
440
441 if (ifidx > 0)
442 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
443 else if (phyidx > -1)
444 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
445
446 return cv;
447
448 nla_put_failure:
449 nl80211_free(cv);
450 return NULL;
451 }
452
453 static int nl80211_send(struct nl80211_msg_conveyor *cv,
454 int (*cb_func)(struct nl_msg *, void *),
455 void *cb_arg)
456 {
457 static struct nl80211_msg_conveyor rcv;
458 int err;
459
460 if (cb_func)
461 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
462 else
463 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
464
465 err = nl_send_auto_complete(nls->nl_sock, cv->msg);
466
467 if (err < 0)
468 goto out;
469
470 err = 1;
471
472 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
473 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
474 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
475
476 while (err > 0)
477 nl_recvmsgs(nls->nl_sock, cv->cb);
478
479 out:
480 nl80211_free(cv);
481 return err;
482 }
483
484 static int nl80211_request(const char *ifname, int cmd, int flags,
485 int (*cb_func)(struct nl_msg *, void *),
486 void *cb_arg)
487 {
488 struct nl80211_msg_conveyor *cv;
489
490 cv = nl80211_msg(ifname, cmd, flags);
491
492 if (!cv)
493 return -ENOMEM;
494
495 return nl80211_send(cv, cb_func, cb_arg);
496 }
497
498 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
499 {
500 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
501 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
502
503 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
504 genlmsg_attrlen(gnlh, 0), NULL);
505
506 return attr;
507 }
508
509 static int nl80211_get_protocol_features_cb(struct nl_msg *msg, void *arg)
510 {
511 uint32_t *features = arg;
512 struct nlattr **attr = nl80211_parse(msg);
513
514 if (attr[NL80211_ATTR_PROTOCOL_FEATURES])
515 *features = nla_get_u32(attr[NL80211_ATTR_PROTOCOL_FEATURES]);
516
517 return NL_SKIP;
518 }
519
520 static int nl80211_get_protocol_features(const char *ifname)
521 {
522 struct nl80211_msg_conveyor *req;
523 uint32_t features = 0;
524
525 req = nl80211_msg(ifname, NL80211_CMD_GET_PROTOCOL_FEATURES, 0);
526 if (req) {
527 nl80211_send(req, nl80211_get_protocol_features_cb, &features);
528 nl80211_free(req);
529 }
530
531 return features;
532 }
533
534 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
535 {
536 struct nl80211_group_conveyor *cv = arg;
537
538 struct nlattr **attr = nl80211_parse(msg);
539 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
540 struct nlattr *mgrp;
541 int mgrpidx;
542
543 if (!attr[CTRL_ATTR_MCAST_GROUPS])
544 return NL_SKIP;
545
546 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
547 {
548 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
549 nla_data(mgrp), nla_len(mgrp), NULL);
550
551 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
552 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
553 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
554 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
555 {
556 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
557 break;
558 }
559 }
560
561 return NL_SKIP;
562 }
563
564 static int nl80211_subscribe(const char *family, const char *group)
565 {
566 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
567 struct nl80211_msg_conveyor *req;
568 int err;
569
570 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
571 if (req)
572 {
573 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
574 err = nl80211_send(req, nl80211_subscribe_cb, &cv);
575
576 if (err)
577 return err;
578
579 return nl_socket_add_membership(nls->nl_sock, cv.id);
580
581 nla_put_failure:
582 nl80211_free(req);
583 }
584
585 return -ENOMEM;
586 }
587
588
589 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
590 {
591 struct nl80211_event_conveyor *cv = arg;
592 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
593
594 if (cv->wait[gnlh->cmd / 32] & (1 << (gnlh->cmd % 32)))
595 cv->recv = gnlh->cmd;
596
597 return NL_SKIP;
598 }
599
600 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
601 {
602 return NL_OK;
603 }
604
605 static int __nl80211_wait(const char *family, const char *group, ...)
606 {
607 struct nl80211_event_conveyor cv = { };
608 struct nl_cb *cb;
609 int err = 0;
610 int cmd;
611 va_list ap;
612
613 if (nl80211_subscribe(family, group))
614 return -ENOENT;
615
616 cb = nl_cb_alloc(NL_CB_DEFAULT);
617
618 if (!cb)
619 return -ENOMEM;
620
621 nl_cb_err(cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
622 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
623 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
624
625 va_start(ap, group);
626
627 for (cmd = va_arg(ap, int); cmd != 0; cmd = va_arg(ap, int))
628 cv.wait[cmd / 32] |= (1 << (cmd % 32));
629
630 va_end(ap);
631
632 while (!cv.recv && !err)
633 nl_recvmsgs(nls->nl_sock, cb);
634
635 nl_cb_put(cb);
636
637 return err;
638 }
639
640 #define nl80211_wait(family, group, ...) \
641 __nl80211_wait(family, group, __VA_ARGS__, 0)
642
643
644 static int nl80211_freq2channel(int freq)
645 {
646 if (freq == 2484)
647 return 14;
648 else if (freq < 2484)
649 return (freq - 2407) / 5;
650 else if (freq >= 4910 && freq <= 4980)
651 return (freq - 4000) / 5;
652 else if(freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 6)
653 return (freq - 56160) / 2160;
654 else
655 return (freq - 5000) / 5;
656 }
657
658 static int nl80211_channel2freq(int channel, const char *band)
659 {
660 if (!band || band[0] != 'a')
661 {
662 if (channel == 14)
663 return 2484;
664 else if (channel < 14)
665 return (channel * 5) + 2407;
666 }
667 else if ( strcmp(band, "ad") == 0)
668 {
669 return 56160 + 2160 * channel;
670 }
671 else
672 {
673 if (channel >= 182 && channel <= 196)
674 return (channel * 5) + 4000;
675 else
676 return (channel * 5) + 5000;
677 }
678
679 return 0;
680 }
681
682 static int nl80211_phyname_cb(struct nl_msg *msg, void *arg)
683 {
684 char *buf = arg;
685 struct nlattr **attr = nl80211_parse(msg);
686
687 if (attr[NL80211_ATTR_WIPHY_NAME])
688 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
689 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
690 else
691 buf[0] = 0;
692
693 return NL_SKIP;
694 }
695
696 static char * nl80211_ifname2phy(const char *ifname)
697 {
698 static char phy[32] = { 0 };
699
700 memset(phy, 0, sizeof(phy));
701
702 nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
703 nl80211_phyname_cb, phy);
704
705 return phy[0] ? phy : NULL;
706 }
707
708 static char * nl80211_phyidx2name(unsigned int idx)
709 {
710 struct nl80211_msg_conveyor *cv;
711 static char phy[32] = { 0 };
712
713 if (nl80211_init() < 0)
714 return NULL;
715
716 cv = nl80211_new(nls->nl80211, NL80211_CMD_GET_WIPHY, 0);
717 if (!cv)
718 return NULL;
719
720 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, idx);
721
722 memset(phy, 0, sizeof(phy));
723 nl80211_send(cv, nl80211_phyname_cb, phy);
724
725 return phy[0] ? phy : NULL;
726
727 nla_put_failure:
728 return NULL;
729 }
730
731 static char * nl80211_phy2ifname(const char *ifname)
732 {
733 int ifidx = -1, cifidx = -1, phyidx = -1;
734 char buffer[64];
735 static char nif[IFNAMSIZ] = { 0 };
736
737 DIR *d;
738 struct dirent *e;
739
740 /* Only accept phy name of the form phy%d or radio%d */
741 if (!ifname)
742 return NULL;
743
744 phyidx = nl80211_phy_idx_from_phy(ifname);
745 if (phyidx < 0)
746 phyidx = nl80211_phy_idx_from_uci(ifname);;
747 if (phyidx < 0)
748 return NULL;
749
750 memset(nif, 0, sizeof(nif));
751
752 if (phyidx > -1)
753 {
754 if ((d = opendir("/sys/class/net")) != NULL)
755 {
756 while ((e = readdir(d)) != NULL)
757 {
758 snprintf(buffer, sizeof(buffer),
759 "/sys/class/net/%s/phy80211/index", e->d_name);
760
761 if (nl80211_readint(buffer) == phyidx)
762 {
763 snprintf(buffer, sizeof(buffer),
764 "/sys/class/net/%s/ifindex", e->d_name);
765
766 if ((cifidx = nl80211_readint(buffer)) >= 0 &&
767 ((ifidx < 0) || (cifidx < ifidx)))
768 {
769 ifidx = cifidx;
770 strncpy(nif, e->d_name, sizeof(nif) - 1);
771 }
772 }
773 }
774
775 closedir(d);
776 }
777 }
778
779 return nif[0] ? nif : NULL;
780 }
781
782 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
783 {
784 int *mode = arg;
785 struct nlattr **tb = nl80211_parse(msg);
786 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
787 IWINFO_OPMODE_UNKNOWN, /* unspecified */
788 IWINFO_OPMODE_ADHOC, /* IBSS */
789 IWINFO_OPMODE_CLIENT, /* managed */
790 IWINFO_OPMODE_MASTER, /* AP */
791 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
792 IWINFO_OPMODE_WDS, /* WDS */
793 IWINFO_OPMODE_MONITOR, /* monitor */
794 IWINFO_OPMODE_MESHPOINT, /* mesh point */
795 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
796 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
797 };
798
799 if (tb[NL80211_ATTR_IFTYPE])
800 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
801
802 return NL_SKIP;
803 }
804
805
806 static int nl80211_get_mode(const char *ifname, int *buf)
807 {
808 char *res;
809
810 *buf = IWINFO_OPMODE_UNKNOWN;
811
812 res = nl80211_phy2ifname(ifname);
813
814 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
815 nl80211_get_mode_cb, buf);
816
817 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
818 }
819
820 static int __nl80211_hostapd_query(const char *ifname, ...)
821 {
822 va_list ap, ap_cur;
823 char *phy, *search, *dest, *key, *val, buf[128];
824 int len, mode, found = 0, match = 1;
825 FILE *fp;
826
827 if (nl80211_get_mode(ifname, &mode))
828 return 0;
829
830 if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN)
831 return 0;
832
833 phy = nl80211_ifname2phy(ifname);
834
835 if (!phy)
836 return 0;
837
838 snprintf(buf, sizeof(buf), "/var/run/hostapd-%s.conf", phy);
839 fp = fopen(buf, "r");
840
841 if (!fp)
842 return 0;
843
844 va_start(ap, ifname);
845
846 /* clear all destination buffers */
847 va_copy(ap_cur, ap);
848
849 while ((search = va_arg(ap_cur, char *)) != NULL)
850 {
851 dest = va_arg(ap_cur, char *);
852 len = va_arg(ap_cur, int);
853
854 memset(dest, 0, len);
855 }
856
857 va_end(ap_cur);
858
859 /* iterate applicable lines and copy found values into dest buffers */
860 while (fgets(buf, sizeof(buf), fp))
861 {
862 key = strtok(buf, " =\t\n");
863 val = strtok(NULL, "\n");
864
865 if (!key || !val || !*key || *key == '#')
866 continue;
867
868 if (!strcmp(key, "interface") || !strcmp(key, "bss"))
869 match = !strcmp(ifname, val);
870
871 if (!match)
872 continue;
873
874 va_copy(ap_cur, ap);
875
876 while ((search = va_arg(ap_cur, char *)) != NULL)
877 {
878 dest = va_arg(ap_cur, char *);
879 len = va_arg(ap_cur, int);
880
881 if (!strcmp(search, key))
882 {
883 strncpy(dest, val, len - 1);
884 found++;
885 break;
886 }
887 }
888
889 va_end(ap_cur);
890 }
891
892 fclose(fp);
893
894 va_end(ap);
895
896 return found;
897 }
898
899 #define nl80211_hostapd_query(ifname, ...) \
900 __nl80211_hostapd_query(ifname, ##__VA_ARGS__, NULL)
901
902
903 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
904 {
905 fd_set rfds;
906 struct timeval tv = { 0, 256000 };
907
908 FD_ZERO(&rfds);
909 FD_SET(sock, &rfds);
910
911 memset(buf, 0, blen);
912
913 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
914 return -1;
915
916 if (!FD_ISSET(sock, &rfds))
917 return -1;
918
919 return recv(sock, buf, blen - 1, 0);
920 }
921
922 static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local)
923 {
924 struct sockaddr_un remote = { 0 };
925 size_t remote_length, local_length;
926
927 int sock = socket(PF_UNIX, SOCK_DGRAM, 0);
928 if (sock < 0)
929 return sock;
930
931 remote.sun_family = AF_UNIX;
932 remote_length = sizeof(remote.sun_family) +
933 sprintf(remote.sun_path, "/var/run/wpa_supplicant-%s/%s",
934 ifname, ifname);
935
936 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
937 {
938 close(sock);
939 return -1;
940 }
941
942 if (connect(sock, (struct sockaddr *)&remote, remote_length))
943 {
944 remote_length = sizeof(remote.sun_family) +
945 sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname);
946
947 if (connect(sock, (struct sockaddr *)&remote, remote_length))
948 {
949 close(sock);
950 return -1;
951 }
952 }
953
954 local->sun_family = AF_UNIX;
955 local_length = sizeof(local->sun_family) +
956 sprintf(local->sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
957
958 if (bind(sock, (struct sockaddr *)local, local_length) < 0)
959 {
960 close(sock);
961 return -1;
962 }
963
964 return sock;
965 }
966
967 static int __nl80211_wpactl_query(const char *ifname, ...)
968 {
969 va_list ap, ap_cur;
970 struct sockaddr_un local = { 0 };
971 int len, mode, found = 0, sock = -1;
972 char *search, *dest, *key, *val, *line, *pos, buf[512];
973
974 if (nl80211_get_mode(ifname, &mode))
975 return 0;
976
977 if (mode != IWINFO_OPMODE_CLIENT &&
978 mode != IWINFO_OPMODE_ADHOC &&
979 mode != IWINFO_OPMODE_MESHPOINT)
980 return 0;
981
982 sock = nl80211_wpactl_connect(ifname, &local);
983
984 if (sock < 0)
985 return 0;
986
987 va_start(ap, ifname);
988
989 /* clear all destination buffers */
990 va_copy(ap_cur, ap);
991
992 while ((search = va_arg(ap_cur, char *)) != NULL)
993 {
994 dest = va_arg(ap_cur, char *);
995 len = va_arg(ap_cur, int);
996
997 memset(dest, 0, len);
998 }
999
1000 va_end(ap_cur);
1001
1002 send(sock, "STATUS", 6, 0);
1003
1004 while (true)
1005 {
1006 if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0)
1007 break;
1008
1009 if (buf[0] == '<')
1010 continue;
1011
1012 for (line = strtok_r(buf, "\n", &pos);
1013 line != NULL;
1014 line = strtok_r(NULL, "\n", &pos))
1015 {
1016 key = strtok(line, "=");
1017 val = strtok(NULL, "\n");
1018
1019 if (!key || !val)
1020 continue;
1021
1022 va_copy(ap_cur, ap);
1023
1024 while ((search = va_arg(ap_cur, char *)) != NULL)
1025 {
1026 dest = va_arg(ap_cur, char *);
1027 len = va_arg(ap_cur, int);
1028
1029 if (!strcmp(search, key))
1030 {
1031 strncpy(dest, val, len - 1);
1032 found++;
1033 break;
1034 }
1035 }
1036
1037 va_end(ap_cur);
1038 }
1039
1040 break;
1041 }
1042
1043 va_end(ap);
1044
1045 close(sock);
1046 unlink(local.sun_path);
1047
1048 return found;
1049 }
1050
1051 #define nl80211_wpactl_query(ifname, ...) \
1052 __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL)
1053
1054
1055 static char * nl80211_ifadd(const char *ifname)
1056 {
1057 char path[PATH_MAX];
1058 static char nif[IFNAMSIZ] = { 0 };
1059 struct nl80211_msg_conveyor *req;
1060 FILE *sysfs;
1061
1062 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
1063 if (req)
1064 {
1065 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
1066
1067 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
1068 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
1069
1070 nl80211_send(req, NULL, NULL);
1071
1072 snprintf(path, sizeof(path) - 1,
1073 "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif);
1074
1075 if ((sysfs = fopen(path, "w")) != NULL)
1076 {
1077 fwrite("0\n", 1, 2, sysfs);
1078 fclose(sysfs);
1079 }
1080
1081 return nif;
1082
1083 nla_put_failure:
1084 nl80211_free(req);
1085 }
1086
1087 return NULL;
1088 }
1089
1090 static void nl80211_ifdel(const char *ifname)
1091 {
1092 struct nl80211_msg_conveyor *req;
1093 int err;
1094
1095 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
1096 if (req)
1097 {
1098 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
1099
1100 nl80211_send(req, NULL, NULL);
1101 return;
1102
1103 nla_put_failure:
1104 nl80211_free(req);
1105 }
1106 }
1107
1108 static void nl80211_hostapd_hup(const char *ifname)
1109 {
1110 int fd, pid = 0;
1111 char buf[32];
1112 char *phy = nl80211_ifname2phy(ifname);
1113
1114 if (phy)
1115 {
1116 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
1117 if ((fd = open(buf, O_RDONLY)) >= 0)
1118 {
1119 if (read(fd, buf, sizeof(buf)) > 0)
1120 pid = atoi(buf);
1121
1122 close(fd);
1123 }
1124
1125 if (pid > 0)
1126 kill(pid, 1);
1127 }
1128 }
1129
1130
1131 static int nl80211_probe(const char *ifname)
1132 {
1133 return !!nl80211_ifname2phy(ifname);
1134 }
1135
1136 struct nl80211_ssid_bssid {
1137 unsigned char *ssid;
1138 unsigned char bssid[7];
1139 };
1140
1141 static int nl80211_get_macaddr_cb(struct nl_msg *msg, void *arg)
1142 {
1143 struct nl80211_ssid_bssid *sb = arg;
1144 struct nlattr **tb = nl80211_parse(msg);
1145
1146 if (tb[NL80211_ATTR_MAC]) {
1147 sb->bssid[0] = 1;
1148 memcpy(sb->bssid + 1, nla_data(tb[NL80211_ATTR_MAC]),
1149 sizeof(sb->bssid) - 1);
1150 }
1151
1152 return NL_SKIP;
1153 }
1154
1155 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
1156 {
1157 int ielen;
1158 unsigned char *ie;
1159 struct nl80211_ssid_bssid *sb = arg;
1160 struct nlattr **tb = nl80211_parse(msg);
1161 struct nlattr *bss[NL80211_BSS_MAX + 1];
1162
1163 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1164 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
1165 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1166 };
1167
1168 if (!tb[NL80211_ATTR_BSS] ||
1169 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1170 bss_policy) ||
1171 !bss[NL80211_BSS_BSSID] ||
1172 !bss[NL80211_BSS_STATUS] ||
1173 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
1174 {
1175 return NL_SKIP;
1176 }
1177
1178 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
1179 {
1180 case NL80211_BSS_STATUS_ASSOCIATED:
1181 case NL80211_BSS_STATUS_AUTHENTICATED:
1182 case NL80211_BSS_STATUS_IBSS_JOINED:
1183
1184 if (sb->ssid)
1185 {
1186 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1187 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1188
1189 while (ielen >= 2 && ielen >= ie[1])
1190 {
1191 if (ie[0] == 0)
1192 {
1193 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1194 return NL_SKIP;
1195 }
1196
1197 ielen -= ie[1] + 2;
1198 ie += ie[1] + 2;
1199 }
1200 }
1201 else
1202 {
1203 sb->bssid[0] = 1;
1204 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
1205 return NL_SKIP;
1206 }
1207
1208 default:
1209 return NL_SKIP;
1210 }
1211 }
1212
1213 static int nl80211_get_ssid(const char *ifname, char *buf)
1214 {
1215 char *res;
1216 struct nl80211_ssid_bssid sb = { .ssid = (unsigned char *)buf };
1217
1218 /* try to find ssid from scan dump results */
1219 res = nl80211_phy2ifname(ifname);
1220 sb.ssid[0] = 0;
1221
1222 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1223 nl80211_get_ssid_bssid_cb, &sb);
1224
1225 /* failed, try to find from hostapd info */
1226 if (sb.ssid[0] == 0)
1227 nl80211_hostapd_query(ifname, "ssid", sb.ssid,
1228 IWINFO_ESSID_MAX_SIZE + 1);
1229
1230 /* failed, try to obtain Mesh ID */
1231 if (sb.ssid[0] == 0)
1232 iwinfo_ubus_query(res ? res : ifname, "mesh_id",
1233 sb.ssid, IWINFO_ESSID_MAX_SIZE + 1);
1234
1235 return (sb.ssid[0] == 0) ? -1 : 0;
1236 }
1237
1238 static int nl80211_get_bssid(const char *ifname, char *buf)
1239 {
1240 char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")];
1241 struct nl80211_ssid_bssid sb = { };
1242
1243 res = nl80211_phy2ifname(ifname);
1244
1245 /* try to obtain mac address via NL80211_CMD_GET_INTERFACE */
1246 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1247 nl80211_get_macaddr_cb, &sb);
1248
1249 /* failed, try to find bssid from scan dump results */
1250 if (sb.bssid[0] == 0)
1251 nl80211_request(res ? res : ifname,
1252 NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1253 nl80211_get_ssid_bssid_cb, &sb);
1254
1255 /* failed, try to find mac from hostapd info */
1256 if ((sb.bssid[0] == 0) &&
1257 nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid)))
1258 {
1259 sb.bssid[0] = 1;
1260 sb.bssid[1] = strtol(&bssid[0], NULL, 16);
1261 sb.bssid[2] = strtol(&bssid[3], NULL, 16);
1262 sb.bssid[3] = strtol(&bssid[6], NULL, 16);
1263 sb.bssid[4] = strtol(&bssid[9], NULL, 16);
1264 sb.bssid[5] = strtol(&bssid[12], NULL, 16);
1265 sb.bssid[6] = strtol(&bssid[15], NULL, 16);
1266 }
1267
1268 if (sb.bssid[0])
1269 {
1270 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
1271 sb.bssid[1], sb.bssid[2], sb.bssid[3],
1272 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
1273
1274 return 0;
1275 }
1276
1277 return -1;
1278 }
1279
1280
1281 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
1282 {
1283 int *freq = arg;
1284 struct nlattr **attr = nl80211_parse(msg);
1285 struct nlattr *binfo[NL80211_BSS_MAX + 1];
1286
1287 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1288 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1289 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1290 };
1291
1292 if (attr[NL80211_ATTR_BSS] &&
1293 !nla_parse_nested(binfo, NL80211_BSS_MAX,
1294 attr[NL80211_ATTR_BSS], bss_policy))
1295 {
1296 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
1297 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
1298 }
1299
1300 return NL_SKIP;
1301 }
1302
1303 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
1304 {
1305 int *freq = arg;
1306 struct nlattr **tb = nl80211_parse(msg);
1307
1308 if (tb[NL80211_ATTR_WIPHY_FREQ])
1309 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
1310
1311 return NL_SKIP;
1312 }
1313
1314 static int nl80211_get_frequency(const char *ifname, int *buf)
1315 {
1316 char *res, channel[4], hwmode[3];
1317
1318 /* try to find frequency from interface info */
1319 res = nl80211_phy2ifname(ifname);
1320 *buf = 0;
1321
1322 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1323 nl80211_get_frequency_info_cb, buf);
1324
1325 /* failed, try to find frequency from hostapd info */
1326 if ((*buf == 0) &&
1327 nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode),
1328 "channel", channel, sizeof(channel)) == 2)
1329 {
1330 *buf = nl80211_channel2freq(atoi(channel), hwmode);
1331 }
1332
1333 /* failed, try to find frequency from scan results */
1334 if (*buf == 0)
1335 {
1336 res = nl80211_phy2ifname(ifname);
1337
1338 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1339 nl80211_get_frequency_scan_cb, buf);
1340 }
1341
1342 return (*buf == 0) ? -1 : 0;
1343 }
1344
1345 static int nl80211_get_center_freq1_cb(struct nl_msg *msg, void *arg)
1346 {
1347 int *freq = arg;
1348 struct nlattr **tb = nl80211_parse(msg);
1349
1350 if (tb[NL80211_ATTR_CENTER_FREQ1])
1351 *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ1]);
1352
1353 return NL_SKIP;
1354 }
1355
1356 static int nl80211_get_center_freq1(const char *ifname, int *buf)
1357 {
1358 char *res;
1359
1360 /* try to find frequency from interface info */
1361 res = nl80211_phy2ifname(ifname);
1362 *buf = 0;
1363
1364 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1365 nl80211_get_center_freq1_cb, buf);
1366
1367 return (*buf == 0) ? -1 : 0;
1368 }
1369
1370 static int nl80211_get_center_freq2_cb(struct nl_msg *msg, void *arg)
1371 {
1372 int *freq = arg;
1373 struct nlattr **tb = nl80211_parse(msg);
1374
1375 if (tb[NL80211_ATTR_CENTER_FREQ2])
1376 *freq = nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ2]);
1377
1378 return NL_SKIP;
1379 }
1380
1381 static int nl80211_get_center_freq2(const char *ifname, int *buf)
1382 {
1383 char *res;
1384
1385 /* try to find frequency from interface info */
1386 res = nl80211_phy2ifname(ifname);
1387 *buf = 0;
1388
1389 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1390 nl80211_get_center_freq2_cb, buf);
1391
1392 return (*buf == 0) ? -1 : 0;
1393 }
1394
1395 static int nl80211_get_channel(const char *ifname, int *buf)
1396 {
1397 if (!nl80211_get_frequency(ifname, buf))
1398 {
1399 *buf = nl80211_freq2channel(*buf);
1400 return 0;
1401 }
1402
1403 return -1;
1404 }
1405
1406 static int nl80211_get_center_chan1(const char *ifname, int *buf)
1407 {
1408 if (!nl80211_get_center_freq1(ifname, buf))
1409 {
1410 *buf = nl80211_freq2channel(*buf);
1411 return 0;
1412 }
1413
1414 return -1;
1415 }
1416
1417 static int nl80211_get_center_chan2(const char *ifname, int *buf)
1418 {
1419 if (!nl80211_get_center_freq2(ifname, buf))
1420 {
1421 *buf = nl80211_freq2channel(*buf);
1422 return 0;
1423 }
1424
1425 return -1;
1426 }
1427
1428 static int nl80211_get_txpower_cb(struct nl_msg *msg, void *arg)
1429 {
1430 int *buf = arg;
1431 struct nlattr **tb = nl80211_parse(msg);
1432
1433 if (tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL])
1434 *buf = iwinfo_mbm2dbm(nla_get_u32(tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL]));
1435
1436 return NL_SKIP;
1437 }
1438
1439 static int nl80211_get_txpower(const char *ifname, int *buf)
1440 {
1441 char *res;
1442
1443 res = nl80211_phy2ifname(ifname);
1444 *buf = 0;
1445
1446 if (nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1447 nl80211_get_txpower_cb, buf))
1448 return -1;
1449
1450 return 0;
1451 }
1452
1453
1454 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1455 {
1456 int8_t dbm;
1457 int16_t mbit;
1458 struct nl80211_rssi_rate *rr = arg;
1459 struct nlattr **attr = nl80211_parse(msg);
1460 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1461 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1462
1463 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1464 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1465 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1466 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1467 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1468 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1469 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1470 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1471 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1472 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1473 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1474 };
1475
1476 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1477 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1478 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1479 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1480 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1481 };
1482
1483 if (attr[NL80211_ATTR_STA_INFO])
1484 {
1485 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1486 attr[NL80211_ATTR_STA_INFO], stats_policy))
1487 {
1488 if (sinfo[NL80211_STA_INFO_SIGNAL])
1489 {
1490 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1491 rr->rssi = (rr->rssi * rr->rssi_samples + dbm) / (rr->rssi_samples + 1);
1492 rr->rssi_samples++;
1493 }
1494
1495 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1496 {
1497 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1498 sinfo[NL80211_STA_INFO_TX_BITRATE],
1499 rate_policy))
1500 {
1501 if (rinfo[NL80211_RATE_INFO_BITRATE])
1502 {
1503 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1504 rr->rate = (rr->rate * rr->rate_samples + mbit) / (rr->rate_samples + 1);
1505 rr->rate_samples++;
1506 }
1507 }
1508 }
1509 }
1510 }
1511
1512 return NL_SKIP;
1513 }
1514
1515 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1516 {
1517 DIR *d;
1518 struct dirent *de;
1519
1520 memset(r, 0, sizeof(*r));
1521
1522 if ((d = opendir("/sys/class/net")) != NULL)
1523 {
1524 while ((de = readdir(d)) != NULL)
1525 {
1526 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1527 (!de->d_name[strlen(ifname)] ||
1528 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1529 {
1530 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
1531 NLM_F_DUMP, nl80211_fill_signal_cb, r);
1532 }
1533 }
1534
1535 closedir(d);
1536 }
1537 }
1538
1539 static int nl80211_get_bitrate(const char *ifname, int *buf)
1540 {
1541 struct nl80211_rssi_rate rr;
1542
1543 nl80211_fill_signal(ifname, &rr);
1544
1545 if (rr.rate_samples)
1546 {
1547 *buf = (rr.rate * 100);
1548 return 0;
1549 }
1550
1551 return -1;
1552 }
1553
1554 static int nl80211_get_signal(const char *ifname, int *buf)
1555 {
1556 struct nl80211_rssi_rate rr;
1557
1558 nl80211_fill_signal(ifname, &rr);
1559
1560 if (rr.rssi_samples)
1561 {
1562 *buf = rr.rssi;
1563 return 0;
1564 }
1565
1566 return -1;
1567 }
1568
1569 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1570 {
1571 int8_t *noise = arg;
1572 struct nlattr **tb = nl80211_parse(msg);
1573 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1574
1575 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1576 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1577 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1578 };
1579
1580 if (!tb[NL80211_ATTR_SURVEY_INFO])
1581 return NL_SKIP;
1582
1583 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1584 tb[NL80211_ATTR_SURVEY_INFO], sp))
1585 return NL_SKIP;
1586
1587 if (!si[NL80211_SURVEY_INFO_NOISE])
1588 return NL_SKIP;
1589
1590 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1591 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1592
1593 return NL_SKIP;
1594 }
1595
1596
1597 static int nl80211_get_noise(const char *ifname, int *buf)
1598 {
1599 int8_t noise = 0;
1600
1601 if (nl80211_request(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP,
1602 nl80211_get_noise_cb, &noise))
1603 goto out;
1604
1605 *buf = noise;
1606 return 0;
1607
1608 out:
1609 *buf = 0;
1610 return -1;
1611 }
1612
1613 static int nl80211_get_quality(const char *ifname, int *buf)
1614 {
1615 int signal;
1616
1617 if (!nl80211_get_signal(ifname, &signal))
1618 {
1619 /* A positive signal level is usually just a quality
1620 * value, pass through as-is */
1621 if (signal >= 0)
1622 {
1623 *buf = signal;
1624 }
1625
1626 /* The cfg80211 wext compat layer assumes a signal range
1627 * of -110 dBm to -40 dBm, the quality value is derived
1628 * by adding 110 to the signal level */
1629 else
1630 {
1631 if (signal < -110)
1632 signal = -110;
1633 else if (signal > -40)
1634 signal = -40;
1635
1636 *buf = (signal + 110);
1637 }
1638
1639 return 0;
1640 }
1641
1642 return -1;
1643 }
1644
1645 static int nl80211_get_quality_max(const char *ifname, int *buf)
1646 {
1647 /* The cfg80211 wext compat layer assumes a maximum
1648 * quality of 70 */
1649 *buf = 70;
1650
1651 return 0;
1652 }
1653
1654 static int nl80211_check_wepkey(const char *key)
1655 {
1656 if (key && *key)
1657 {
1658 switch (strlen(key))
1659 {
1660 case 5:
1661 case 10:
1662 return IWINFO_CIPHER_WEP40;
1663
1664 case 13:
1665 case 26:
1666 return IWINFO_CIPHER_WEP104;
1667 }
1668 }
1669
1670 return 0;
1671 }
1672
1673 static struct {
1674 const char *match;
1675 int version;
1676 int suite;
1677 } wpa_key_mgmt_strings[] = {
1678 { "IEEE 802.1X/EAP", 0, IWINFO_KMGMT_8021x },
1679 { "EAP-SUITE-B-192", 4, IWINFO_KMGMT_8021x },
1680 { "EAP-SUITE-B", 4, IWINFO_KMGMT_8021x },
1681 { "EAP-SHA256", 0, IWINFO_KMGMT_8021x },
1682 { "PSK-SHA256", 0, IWINFO_KMGMT_PSK },
1683 { "NONE", 0, IWINFO_KMGMT_NONE },
1684 { "None", 0, IWINFO_KMGMT_NONE },
1685 { "PSK", 0, IWINFO_KMGMT_PSK },
1686 { "EAP", 0, IWINFO_KMGMT_8021x },
1687 { "SAE", 4, IWINFO_KMGMT_SAE },
1688 { "OWE", 4, IWINFO_KMGMT_OWE }
1689 };
1690
1691 static void parse_wpa_suites(const char *str, int defversion,
1692 uint8_t *versions, uint8_t *suites)
1693 {
1694 size_t l;
1695 int i, version;
1696 const char *p, *q, *m, *sep = " \t\n,-+/";
1697
1698 for (p = str; *p; )
1699 {
1700 q = p;
1701
1702 for (i = 0; i < ARRAY_SIZE(wpa_key_mgmt_strings); i++)
1703 {
1704 m = wpa_key_mgmt_strings[i].match;
1705 l = strlen(m);
1706
1707 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l])))
1708 {
1709 if (wpa_key_mgmt_strings[i].version != 0)
1710 version = wpa_key_mgmt_strings[i].version;
1711 else
1712 version = defversion;
1713
1714 *versions |= version;
1715 *suites |= wpa_key_mgmt_strings[i].suite;
1716
1717 q += l;
1718 break;
1719 }
1720 }
1721
1722 if (q == p)
1723 q += strcspn(q, sep);
1724
1725 p = q + strspn(q, sep);
1726 }
1727 }
1728
1729 static struct {
1730 const char *match;
1731 int cipher;
1732 } wpa_cipher_strings[] = {
1733 { "WEP-104", IWINFO_CIPHER_WEP104 },
1734 { "WEP-40", IWINFO_CIPHER_WEP40 },
1735 { "NONE", IWINFO_CIPHER_NONE },
1736 { "TKIP", IWINFO_CIPHER_TKIP },
1737 { "CCMP-256",IWINFO_CIPHER_CCMP256 },
1738 { "CCMP", IWINFO_CIPHER_CCMP },
1739 { "GCMP-256",IWINFO_CIPHER_GCMP256 },
1740 { "GCMP", IWINFO_CIPHER_GCMP }
1741 };
1742
1743 static void parse_wpa_ciphers(const char *str, uint16_t *ciphers)
1744 {
1745 int i;
1746 size_t l;
1747 const char *m, *p, *q, *sep = " \t\n,-+/";
1748
1749 for (p = str; *p; )
1750 {
1751 q = p;
1752
1753 for (i = 0; i < ARRAY_SIZE(wpa_cipher_strings); i++)
1754 {
1755 m = wpa_cipher_strings[i].match;
1756 l = strlen(m);
1757
1758 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l])))
1759 {
1760 *ciphers |= wpa_cipher_strings[i].cipher;
1761
1762 q += l;
1763 break;
1764 }
1765 }
1766
1767 if (q == p)
1768 q += strcspn(q, sep);
1769
1770 p = q + strspn(q, sep);
1771 }
1772 }
1773
1774 static int nl80211_get_encryption(const char *ifname, char *buf)
1775 {
1776 char *p;
1777 int opmode;
1778 uint8_t wpa_version = 0;
1779 char wpa[2], wpa_key_mgmt[64], wpa_pairwise[16], wpa_groupwise[16];
1780 char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27];
1781 char mode[16];
1782
1783 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1784
1785 /* WPA supplicant */
1786 if (nl80211_wpactl_query(ifname,
1787 "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise),
1788 "group_cipher", wpa_groupwise, sizeof(wpa_groupwise),
1789 "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1790 "mode", mode, sizeof(mode)))
1791 {
1792 /* WEP or Open */
1793 if (!strcmp(wpa_key_mgmt, "NONE"))
1794 {
1795 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1796 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers);
1797
1798 if (c->pair_ciphers != 0 && c->pair_ciphers != IWINFO_CIPHER_NONE) {
1799 c->enabled = 1;
1800 c->auth_suites = IWINFO_KMGMT_NONE;
1801 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1802 }
1803 else {
1804 c->pair_ciphers = 0;
1805 c->group_ciphers = 0;
1806 }
1807 }
1808
1809 /* MESH with SAE */
1810 else if (!strcmp(mode, "mesh") && !strcmp(wpa_key_mgmt, "UNKNOWN"))
1811 {
1812 c->enabled = 1;
1813 c->wpa_version = 4;
1814 c->auth_suites = IWINFO_KMGMT_SAE;
1815 c->pair_ciphers = IWINFO_CIPHER_CCMP;
1816 c->group_ciphers = IWINFO_CIPHER_CCMP;
1817 }
1818
1819 /* WPA */
1820 else
1821 {
1822 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1823 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers);
1824
1825 p = wpa_key_mgmt;
1826
1827 if (!strncmp(p, "WPA2-", 5) || !strncmp(p, "WPA2/", 5))
1828 {
1829 p += 5;
1830 wpa_version = 2;
1831 }
1832 else if (!strncmp(p, "WPA-", 4))
1833 {
1834 p += 4;
1835 wpa_version = 1;
1836 }
1837
1838 parse_wpa_suites(p, wpa_version, &c->wpa_version, &c->auth_suites);
1839
1840 c->enabled = !!(c->wpa_version && c->auth_suites);
1841 }
1842
1843 return 0;
1844 }
1845
1846 /* Hostapd */
1847 else if (nl80211_hostapd_query(ifname,
1848 "wpa", wpa, sizeof(wpa),
1849 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1850 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise),
1851 "auth_algs", auth_algs, sizeof(auth_algs),
1852 "wep_key0", wep_key0, sizeof(wep_key0),
1853 "wep_key1", wep_key1, sizeof(wep_key1),
1854 "wep_key2", wep_key2, sizeof(wep_key2),
1855 "wep_key3", wep_key3, sizeof(wep_key3)))
1856 {
1857 c->wpa_version = 0;
1858
1859 if (wpa_key_mgmt[0])
1860 {
1861 for (p = strtok(wpa_key_mgmt, " \t"); p != NULL; p = strtok(NULL, " \t"))
1862 {
1863 if (!strncmp(p, "WPA-", 4))
1864 p += 4;
1865
1866 parse_wpa_suites(p, atoi(wpa), &c->wpa_version, &c->auth_suites);
1867 }
1868
1869 c->enabled = c->wpa_version ? 1 : 0;
1870 }
1871
1872 if (wpa_pairwise[0])
1873 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1874
1875 if (auth_algs[0])
1876 {
1877 switch (atoi(auth_algs))
1878 {
1879 case 1:
1880 c->auth_algs |= IWINFO_AUTH_OPEN;
1881 break;
1882
1883 case 2:
1884 c->auth_algs |= IWINFO_AUTH_SHARED;
1885 break;
1886
1887 case 3:
1888 c->auth_algs |= IWINFO_AUTH_OPEN;
1889 c->auth_algs |= IWINFO_AUTH_SHARED;
1890 break;
1891 }
1892
1893 c->pair_ciphers |= nl80211_check_wepkey(wep_key0);
1894 c->pair_ciphers |= nl80211_check_wepkey(wep_key1);
1895 c->pair_ciphers |= nl80211_check_wepkey(wep_key2);
1896 c->pair_ciphers |= nl80211_check_wepkey(wep_key3);
1897
1898 c->enabled = (c->auth_algs && c->pair_ciphers) ? 1 : 0;
1899 }
1900
1901 c->group_ciphers = c->pair_ciphers;
1902
1903 return 0;
1904 }
1905
1906 /* Ad-Hoc or Mesh interfaces without wpa_supplicant are open */
1907 else if (!nl80211_get_mode(ifname, &opmode) &&
1908 (opmode == IWINFO_OPMODE_ADHOC ||
1909 opmode == IWINFO_OPMODE_MESHPOINT))
1910 {
1911 c->enabled = 0;
1912
1913 return 0;
1914 }
1915
1916
1917 return -1;
1918 }
1919
1920 static int nl80211_get_phyname(const char *ifname, char *buf)
1921 {
1922 const char *name;
1923
1924 name = nl80211_ifname2phy(ifname);
1925
1926 if (name)
1927 {
1928 strcpy(buf, name);
1929 return 0;
1930 }
1931 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1932 {
1933 name = nl80211_ifname2phy(name);
1934
1935 if (name)
1936 {
1937 strcpy(buf, ifname);
1938 return 0;
1939 }
1940 }
1941
1942 return -1;
1943 }
1944
1945
1946 static void nl80211_parse_rateinfo(struct nlattr **ri,
1947 struct iwinfo_rate_entry *re)
1948 {
1949 if (ri[NL80211_RATE_INFO_BITRATE32])
1950 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100;
1951 else if (ri[NL80211_RATE_INFO_BITRATE])
1952 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100;
1953
1954 if (ri[NL80211_RATE_INFO_HE_MCS])
1955 {
1956 re->is_he = 1;
1957 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_HE_MCS]);
1958
1959 if (ri[NL80211_RATE_INFO_HE_NSS])
1960 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_HE_NSS]);
1961 if (ri[NL80211_RATE_INFO_HE_GI])
1962 re->he_gi = nla_get_u8(ri[NL80211_RATE_INFO_HE_GI]);
1963 if (ri[NL80211_RATE_INFO_HE_DCM])
1964 re->he_dcm = nla_get_u8(ri[NL80211_RATE_INFO_HE_DCM]);
1965 }
1966 else if (ri[NL80211_RATE_INFO_VHT_MCS])
1967 {
1968 re->is_vht = 1;
1969 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]);
1970
1971 if (ri[NL80211_RATE_INFO_VHT_NSS])
1972 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]);
1973 }
1974 else if (ri[NL80211_RATE_INFO_MCS])
1975 {
1976 re->is_ht = 1;
1977 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]);
1978 }
1979
1980 if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH])
1981 re->mhz = 5;
1982 else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH])
1983 re->mhz = 10;
1984 else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH])
1985 re->mhz = 40;
1986 else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH])
1987 re->mhz = 80;
1988 else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] ||
1989 ri[NL80211_RATE_INFO_160_MHZ_WIDTH])
1990 re->mhz = 160;
1991 else
1992 re->mhz = 20;
1993
1994 if (ri[NL80211_RATE_INFO_SHORT_GI])
1995 re->is_short_gi = 1;
1996
1997 re->is_40mhz = (re->mhz == 40);
1998 }
1999
2000 static int nl80211_get_survey_cb(struct nl_msg *msg, void *arg)
2001 {
2002 struct nl80211_array_buf *arr = arg;
2003 struct iwinfo_survey_entry *e = arr->buf;
2004 struct nlattr **attr = nl80211_parse(msg);
2005 struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
2006 int rc;
2007
2008 static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
2009 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
2010 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
2011 [NL80211_SURVEY_INFO_TIME] = { .type = NLA_U64 },
2012 [NL80211_SURVEY_INFO_TIME_BUSY] = { .type = NLA_U64 },
2013 [NL80211_SURVEY_INFO_TIME_EXT_BUSY] = { .type = NLA_U64 },
2014 [NL80211_SURVEY_INFO_TIME_RX] = { .type = NLA_U64 },
2015 [NL80211_SURVEY_INFO_TIME_TX] = { .type = NLA_U64 },
2016 };
2017
2018 rc = nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
2019 attr[NL80211_ATTR_SURVEY_INFO],
2020 survey_policy);
2021 if (rc)
2022 return NL_SKIP;
2023
2024 /* advance to end of array */
2025 e += arr->count;
2026 memset(e, 0, sizeof(*e));
2027
2028 if (sinfo[NL80211_SURVEY_INFO_FREQUENCY])
2029 e->mhz = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]);
2030
2031 if (sinfo[NL80211_SURVEY_INFO_NOISE])
2032 e->noise = nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
2033
2034 if (sinfo[NL80211_SURVEY_INFO_TIME])
2035 e->active_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME]);
2036
2037 if (sinfo[NL80211_SURVEY_INFO_TIME_BUSY])
2038 e->busy_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_BUSY]);
2039
2040 if (sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY])
2041 e->busy_time_ext = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]);
2042
2043 if (sinfo[NL80211_SURVEY_INFO_TIME_RX])
2044 e->rxtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_RX]);
2045
2046 if (sinfo[NL80211_SURVEY_INFO_TIME_TX])
2047 e->txtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_TX]);
2048
2049 arr->count++;
2050 return NL_SKIP;
2051 }
2052
2053
2054 static void plink_state_to_str(char *dst, unsigned state)
2055 {
2056 switch (state) {
2057 case NL80211_PLINK_LISTEN:
2058 strcpy(dst, "LISTEN");
2059 break;
2060 case NL80211_PLINK_OPN_SNT:
2061 strcpy(dst, "OPN_SNT");
2062 break;
2063 case NL80211_PLINK_OPN_RCVD:
2064 strcpy(dst, "OPN_RCVD");
2065 break;
2066 case NL80211_PLINK_CNF_RCVD:
2067 strcpy(dst, "CNF_RCVD");
2068 break;
2069 case NL80211_PLINK_ESTAB:
2070 strcpy(dst, "ESTAB");
2071 break;
2072 case NL80211_PLINK_HOLDING:
2073 strcpy(dst, "HOLDING");
2074 break;
2075 case NL80211_PLINK_BLOCKED:
2076 strcpy(dst, "BLOCKED");
2077 break;
2078 default:
2079 strcpy(dst, "UNKNOWN");
2080 break;
2081 }
2082 }
2083
2084 static void power_mode_to_str(char *dst, struct nlattr *a)
2085 {
2086 enum nl80211_mesh_power_mode pm = nla_get_u32(a);
2087
2088 switch (pm) {
2089 case NL80211_MESH_POWER_ACTIVE:
2090 strcpy(dst, "ACTIVE");
2091 break;
2092 case NL80211_MESH_POWER_LIGHT_SLEEP:
2093 strcpy(dst, "LIGHT SLEEP");
2094 break;
2095 case NL80211_MESH_POWER_DEEP_SLEEP:
2096 strcpy(dst, "DEEP SLEEP");
2097 break;
2098 default:
2099 strcpy(dst, "UNKNOWN");
2100 break;
2101 }
2102 }
2103
2104 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
2105 {
2106 struct nl80211_array_buf *arr = arg;
2107 struct iwinfo_assoclist_entry *e = arr->buf;
2108 struct nlattr **attr = nl80211_parse(msg);
2109 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
2110 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
2111 struct nl80211_sta_flag_update *sta_flags;
2112
2113 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
2114 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
2115 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
2116 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
2117 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
2118 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
2119 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
2120 [NL80211_STA_INFO_SIGNAL_AVG] = { .type = NLA_U8 },
2121 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
2122 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
2123 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 },
2124 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
2125 [NL80211_STA_INFO_CONNECTED_TIME]= { .type = NLA_U32 },
2126 [NL80211_STA_INFO_RX_DROP_MISC] = { .type = NLA_U64 },
2127 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 },
2128 [NL80211_STA_INFO_STA_FLAGS] =
2129 { .minlen = sizeof(struct nl80211_sta_flag_update) },
2130 [NL80211_STA_INFO_EXPECTED_THROUGHPUT] = { .type = NLA_U32 },
2131 /* mesh */
2132 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
2133 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
2134 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
2135 [NL80211_STA_INFO_LOCAL_PM] = { .type = NLA_U32 },
2136 [NL80211_STA_INFO_PEER_PM] = { .type = NLA_U32 },
2137 [NL80211_STA_INFO_NONPEER_PM] = { .type = NLA_U32 },
2138 };
2139
2140 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
2141 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
2142 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
2143 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
2144 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
2145 };
2146
2147 /* advance to end of array */
2148 e += arr->count;
2149 memset(e, 0, sizeof(*e));
2150
2151 if (attr[NL80211_ATTR_MAC])
2152 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
2153
2154 if (attr[NL80211_ATTR_STA_INFO] &&
2155 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
2156 attr[NL80211_ATTR_STA_INFO], stats_policy))
2157 {
2158 if (sinfo[NL80211_STA_INFO_SIGNAL])
2159 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
2160
2161 if (sinfo[NL80211_STA_INFO_SIGNAL_AVG])
2162 e->signal_avg = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]);
2163
2164 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
2165 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
2166
2167 if (sinfo[NL80211_STA_INFO_CONNECTED_TIME])
2168 e->connected_time = nla_get_u32(sinfo[NL80211_STA_INFO_CONNECTED_TIME]);
2169
2170 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
2171 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
2172
2173 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
2174 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
2175
2176 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
2177 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
2178 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
2179 nl80211_parse_rateinfo(rinfo, &e->rx_rate);
2180
2181 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
2182 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
2183 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
2184 nl80211_parse_rateinfo(rinfo, &e->tx_rate);
2185
2186 if (sinfo[NL80211_STA_INFO_RX_BYTES])
2187 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
2188
2189 if (sinfo[NL80211_STA_INFO_TX_BYTES])
2190 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
2191
2192 if (sinfo[NL80211_STA_INFO_TX_RETRIES])
2193 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
2194
2195 if (sinfo[NL80211_STA_INFO_TX_FAILED])
2196 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
2197
2198 if (sinfo[NL80211_STA_INFO_T_OFFSET])
2199 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]);
2200
2201 if (sinfo[NL80211_STA_INFO_RX_DROP_MISC])
2202 e->rx_drop_misc = nla_get_u64(sinfo[NL80211_STA_INFO_RX_DROP_MISC]);
2203
2204 if (sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT])
2205 e->thr = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]);
2206
2207 /* mesh */
2208 if (sinfo[NL80211_STA_INFO_LLID])
2209 e->llid = nla_get_u16(sinfo[NL80211_STA_INFO_LLID]);
2210
2211 if (sinfo[NL80211_STA_INFO_PLID])
2212 e->plid = nla_get_u16(sinfo[NL80211_STA_INFO_PLID]);
2213
2214 if (sinfo[NL80211_STA_INFO_PLINK_STATE])
2215 plink_state_to_str(e->plink_state,
2216 nla_get_u8(sinfo[NL80211_STA_INFO_PLINK_STATE]));
2217
2218 if (sinfo[NL80211_STA_INFO_LOCAL_PM])
2219 power_mode_to_str(e->local_ps, sinfo[NL80211_STA_INFO_LOCAL_PM]);
2220 if (sinfo[NL80211_STA_INFO_PEER_PM])
2221 power_mode_to_str(e->peer_ps, sinfo[NL80211_STA_INFO_PEER_PM]);
2222 if (sinfo[NL80211_STA_INFO_NONPEER_PM])
2223 power_mode_to_str(e->nonpeer_ps, sinfo[NL80211_STA_INFO_NONPEER_PM]);
2224
2225 /* Station flags */
2226 if (sinfo[NL80211_STA_INFO_STA_FLAGS])
2227 {
2228 sta_flags = (struct nl80211_sta_flag_update *)
2229 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
2230
2231 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
2232 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
2233 e->is_authorized = 1;
2234
2235 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
2236 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
2237 e->is_authenticated = 1;
2238
2239 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
2240 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
2241 e->is_preamble_short = 1;
2242
2243 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
2244 sta_flags->set & BIT(NL80211_STA_FLAG_WME))
2245 e->is_wme = 1;
2246
2247 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
2248 sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
2249 e->is_mfp = 1;
2250
2251 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
2252 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2253 e->is_tdls = 1;
2254 }
2255 }
2256
2257 e->noise = 0; /* filled in by caller */
2258 arr->count++;
2259
2260 return NL_SKIP;
2261 }
2262
2263 static int nl80211_get_survey(const char *ifname, char *buf, int *len)
2264 {
2265 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2266 int rc;
2267
2268 rc = nl80211_request(ifname, NL80211_CMD_GET_SURVEY,
2269 NLM_F_DUMP, nl80211_get_survey_cb, &arr);
2270 if (!rc)
2271 *len = (arr.count * sizeof(struct iwinfo_survey_entry));
2272 else
2273 *len = 0;
2274
2275 return 0;
2276 }
2277
2278 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
2279 {
2280 DIR *d;
2281 int i, noise = 0;
2282 struct dirent *de;
2283 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2284 struct iwinfo_assoclist_entry *e;
2285
2286 if ((d = opendir("/sys/class/net")) != NULL)
2287 {
2288 while ((de = readdir(d)) != NULL)
2289 {
2290 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
2291 (!de->d_name[strlen(ifname)] ||
2292 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
2293 {
2294 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
2295 NLM_F_DUMP, nl80211_get_assoclist_cb, &arr);
2296 }
2297 }
2298
2299 closedir(d);
2300
2301 if (!nl80211_get_noise(ifname, &noise))
2302 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
2303 e->noise = noise;
2304
2305 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
2306 return 0;
2307 }
2308
2309 return -1;
2310 }
2311
2312 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
2313 {
2314 int *dbm_max = arg;
2315 int ch_cur, ch_cmp, bands_remain, freqs_remain;
2316
2317 struct nlattr **attr = nl80211_parse(msg);
2318 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2319 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2320 struct nlattr *band, *freq;
2321
2322 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2323 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2324 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2325 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2326 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2327 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2328 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2329 };
2330
2331 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
2332 *dbm_max = -1;
2333
2334 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2335 {
2336 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
2337 nla_len(band), NULL);
2338
2339 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2340 {
2341 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2342 nla_data(freq), nla_len(freq), freq_policy);
2343
2344 ch_cmp = nl80211_freq2channel(nla_get_u32(
2345 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
2346
2347 if ((!ch_cur || (ch_cmp == ch_cur)) &&
2348 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
2349 {
2350 *dbm_max = (int)(0.01 * nla_get_u32(
2351 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
2352
2353 break;
2354 }
2355 }
2356 }
2357
2358 return NL_SKIP;
2359 }
2360
2361 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
2362 {
2363 int err, ch_cur;
2364 int dbm_max = -1, dbm_cur, dbm_cnt;
2365 struct nl80211_msg_conveyor *req;
2366 struct iwinfo_txpwrlist_entry entry;
2367
2368 if (nl80211_get_channel(ifname, &ch_cur))
2369 ch_cur = 0;
2370
2371 /* initialize the value pointer with channel for callback */
2372 dbm_max = ch_cur;
2373
2374 err = nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2375 nl80211_get_txpwrlist_cb, &dbm_max);
2376
2377 if (!err)
2378 {
2379 for (dbm_cur = 0, dbm_cnt = 0;
2380 dbm_cur < dbm_max;
2381 dbm_cur++, dbm_cnt++)
2382 {
2383 entry.dbm = dbm_cur;
2384 entry.mw = iwinfo_dbm2mw(dbm_cur);
2385
2386 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2387 }
2388
2389 entry.dbm = dbm_max;
2390 entry.mw = iwinfo_dbm2mw(dbm_max);
2391
2392 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2393 dbm_cnt++;
2394
2395 *len = dbm_cnt * sizeof(entry);
2396 return 0;
2397 }
2398
2399 return -1;
2400 }
2401
2402 static void nl80211_get_scancrypto(char *spec, struct iwinfo_crypto_entry *c)
2403 {
2404 int wpa_version = 0;
2405 char *p, *q, *proto, *suites;
2406
2407 c->enabled = 0;
2408
2409 for (p = strtok_r(spec, "[]", &q); p; p = strtok_r(NULL, "[]", &q)) {
2410 if (!strcmp(p, "WEP")) {
2411 c->enabled = 1;
2412 c->auth_suites = IWINFO_KMGMT_NONE;
2413 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2414 c->pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2415 break;
2416 }
2417
2418 proto = strtok(p, "-");
2419 suites = strtok(NULL, "]");
2420
2421 if (!proto || !suites)
2422 continue;
2423
2424 if (!strcmp(proto, "WPA2") || !strcmp(proto, "RSN"))
2425 wpa_version = 2;
2426 else if (!strcmp(proto, "WPA"))
2427 wpa_version = 1;
2428 else
2429 continue;
2430
2431 c->enabled = 1;
2432
2433 parse_wpa_suites(suites, wpa_version, &c->wpa_version, &c->auth_suites);
2434 parse_wpa_ciphers(suites, &c->pair_ciphers);
2435 }
2436 }
2437
2438
2439 struct nl80211_scanlist {
2440 struct iwinfo_scanlist_entry *e;
2441 int len;
2442 };
2443
2444
2445 static void nl80211_get_scanlist_ie(struct nlattr **bss,
2446 struct iwinfo_scanlist_entry *e)
2447 {
2448 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2449 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2450 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
2451 int len;
2452
2453 while (ielen >= 2 && ielen >= ie[1])
2454 {
2455 switch (ie[0])
2456 {
2457 case 0: /* SSID */
2458 case 114: /* Mesh ID */
2459 if (e->ssid[0] == 0) {
2460 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
2461 memcpy(e->ssid, ie + 2, len);
2462 e->ssid[len] = 0;
2463 }
2464 break;
2465
2466 case 48: /* RSN */
2467 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
2468 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
2469 break;
2470
2471 case 221: /* Vendor */
2472 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
2473 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
2474 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
2475 break;
2476 case 61: /* HT oeration */
2477 if (ie[1] >= 3) {
2478 e->ht_chan_info.primary_chan = ie[2];
2479 e->ht_chan_info.secondary_chan_off = ie[3] & 0x3;
2480 e->ht_chan_info.chan_width = (ie[4] & 0x4)>>2;
2481 }
2482 break;
2483 case 192: /* VHT operation */
2484 if (ie[1] >= 3) {
2485 e->vht_chan_info.chan_width = ie[2];
2486 e->vht_chan_info.center_chan_1 = ie[3];
2487 e->vht_chan_info.center_chan_2 = ie[4];
2488 }
2489 break;
2490 }
2491
2492 ielen -= ie[1] + 2;
2493 ie += ie[1] + 2;
2494 }
2495 }
2496
2497 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
2498 {
2499 int8_t rssi;
2500 uint16_t caps;
2501
2502 struct nl80211_scanlist *sl = arg;
2503 struct nlattr **tb = nl80211_parse(msg);
2504 struct nlattr *bss[NL80211_BSS_MAX + 1];
2505
2506 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2507 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2508 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2509 [NL80211_BSS_BSSID] = { 0 },
2510 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2511 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2512 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
2513 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2514 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2515 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2516 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2517 [NL80211_BSS_BEACON_IES] = { 0 },
2518 };
2519
2520 if (!tb[NL80211_ATTR_BSS] ||
2521 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2522 bss_policy) ||
2523 !bss[NL80211_BSS_BSSID])
2524 {
2525 return NL_SKIP;
2526 }
2527
2528 if (bss[NL80211_BSS_CAPABILITY])
2529 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2530 else
2531 caps = 0;
2532
2533 memset(sl->e, 0, sizeof(*sl->e));
2534 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
2535
2536 if (caps & (1<<1))
2537 sl->e->mode = IWINFO_OPMODE_ADHOC;
2538 else if (caps & (1<<0))
2539 sl->e->mode = IWINFO_OPMODE_MASTER;
2540 else
2541 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
2542
2543 if (caps & (1<<4))
2544 sl->e->crypto.enabled = 1;
2545
2546 if (bss[NL80211_BSS_FREQUENCY])
2547 sl->e->channel = nl80211_freq2channel(nla_get_u32(
2548 bss[NL80211_BSS_FREQUENCY]));
2549
2550 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
2551 nl80211_get_scanlist_ie(bss, sl->e);
2552
2553 if (bss[NL80211_BSS_SIGNAL_MBM])
2554 {
2555 sl->e->signal =
2556 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
2557
2558 rssi = sl->e->signal - 0x100;
2559
2560 if (rssi < -110)
2561 rssi = -110;
2562 else if (rssi > -40)
2563 rssi = -40;
2564
2565 sl->e->quality = (rssi + 110);
2566 sl->e->quality_max = 70;
2567 }
2568
2569 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
2570 {
2571 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2572 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2573 }
2574
2575 sl->e++;
2576 sl->len++;
2577
2578 return NL_SKIP;
2579 }
2580
2581 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
2582 {
2583 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
2584
2585 if (nl80211_request(ifname, NL80211_CMD_TRIGGER_SCAN, 0, NULL, NULL))
2586 goto out;
2587
2588 if (nl80211_wait("nl80211", "scan",
2589 NL80211_CMD_NEW_SCAN_RESULTS, NL80211_CMD_SCAN_ABORTED))
2590 goto out;
2591
2592 if (nl80211_request(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
2593 nl80211_get_scanlist_cb, &sl))
2594 goto out;
2595
2596 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
2597 return 0;
2598
2599 out:
2600 *len = 0;
2601 return -1;
2602 }
2603
2604 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
2605 {
2606 #define hex(x) \
2607 (((x) >= 'a') ? ((x) - 'a' + 10) : \
2608 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0')))
2609
2610 int len = 0;
2611
2612 while (*in)
2613 {
2614 if (len + 1 >= outlen)
2615 break;
2616
2617 switch (*in)
2618 {
2619 case '\\':
2620 in++;
2621 switch (*in)
2622 {
2623 case 'n':
2624 out[len++] = '\n'; in++;
2625 break;
2626
2627 case 'r':
2628 out[len++] = '\r'; in++;
2629 break;
2630
2631 case 't':
2632 out[len++] = '\t'; in++;
2633 break;
2634
2635 case 'e':
2636 out[len++] = '\033'; in++;
2637 break;
2638
2639 case 'x':
2640 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
2641 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
2642 in += 3;
2643 break;
2644
2645 default:
2646 out[len++] = *in++;
2647 break;
2648 }
2649 break;
2650
2651 default:
2652 out[len++] = *in++;
2653 break;
2654 }
2655 }
2656
2657 if (outlen > len)
2658 out[len] = '\0';
2659
2660 return len;
2661 }
2662
2663 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len)
2664 {
2665 int sock, qmax, rssi, tries, count = -1, ready = 0;
2666 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096];
2667 struct sockaddr_un local = { 0 };
2668 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
2669
2670 sock = nl80211_wpactl_connect(ifname, &local);
2671
2672 if (sock < 0)
2673 return sock;
2674
2675 send(sock, "ATTACH", 6, 0);
2676 send(sock, "SCAN", 4, 0);
2677
2678 /*
2679 * wait for scan results:
2680 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan
2681 * 72 channels at most. We'll also receive two "OK" messages acknowledging
2682 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra
2683 * time to process the results, so try 72 + 2 + 1 times.
2684 */
2685 for (tries = 0; tries < 75; tries++)
2686 {
2687 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0)
2688 continue;
2689
2690 /* got an event notification */
2691 if (reply[0] == '<')
2692 {
2693 /* scan results are ready */
2694 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS"))
2695 {
2696 /* send "SCAN_RESULTS" command */
2697 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12);
2698 break;
2699 }
2700
2701 /* is another unrelated event, retry */
2702 tries--;
2703 }
2704
2705 /* scanning already in progress, keep awaiting results */
2706 else if (!strcmp(reply, "FAIL-BUSY\n"))
2707 {
2708 tries--;
2709 }
2710
2711 /* another failure, abort */
2712 else if (!strncmp(reply, "FAIL-", 5))
2713 {
2714 break;
2715 }
2716 }
2717
2718 /* receive and parse scan results if the wait above didn't time out */
2719 while (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
2720 {
2721 /* received an event notification, receive again */
2722 if (reply[0] == '<')
2723 continue;
2724
2725 nl80211_get_quality_max(ifname, &qmax);
2726
2727 for (line = strtok_r(reply, "\n", &pos);
2728 line != NULL;
2729 line = strtok_r(NULL, "\n", &pos))
2730 {
2731 /* skip header line */
2732 if (count < 0)
2733 {
2734 count++;
2735 continue;
2736 }
2737
2738 bssid = strtok(line, "\t");
2739 freq = strtok(NULL, "\t");
2740 signal = strtok(NULL, "\t");
2741 flags = strtok(NULL, "\t");
2742 ssid = strtok(NULL, "\n");
2743
2744 if (!bssid || !freq || !signal || !flags)
2745 continue;
2746
2747 /* BSSID */
2748 e->mac[0] = strtol(&bssid[0], NULL, 16);
2749 e->mac[1] = strtol(&bssid[3], NULL, 16);
2750 e->mac[2] = strtol(&bssid[6], NULL, 16);
2751 e->mac[3] = strtol(&bssid[9], NULL, 16);
2752 e->mac[4] = strtol(&bssid[12], NULL, 16);
2753 e->mac[5] = strtol(&bssid[15], NULL, 16);
2754
2755 /* SSID */
2756 if (ssid)
2757 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2758 else
2759 e->ssid[0] = 0;
2760
2761 /* Mode */
2762 if (strstr(flags, "[MESH]"))
2763 e->mode = IWINFO_OPMODE_MESHPOINT;
2764 else if (strstr(flags, "[IBSS]"))
2765 e->mode = IWINFO_OPMODE_ADHOC;
2766 else
2767 e->mode = IWINFO_OPMODE_MASTER;
2768
2769 /* Channel */
2770 e->channel = nl80211_freq2channel(atoi(freq));
2771
2772 /* Signal */
2773 rssi = atoi(signal);
2774 e->signal = rssi;
2775
2776 /* Quality */
2777 if (rssi < 0)
2778 {
2779 /* The cfg80211 wext compat layer assumes a signal range
2780 * of -110 dBm to -40 dBm, the quality value is derived
2781 * by adding 110 to the signal level */
2782 if (rssi < -110)
2783 rssi = -110;
2784 else if (rssi > -40)
2785 rssi = -40;
2786
2787 e->quality = (rssi + 110);
2788 }
2789 else
2790 {
2791 e->quality = rssi;
2792 }
2793
2794 /* Max. Quality */
2795 e->quality_max = qmax;
2796
2797 /* Crypto */
2798 nl80211_get_scancrypto(flags, &e->crypto);
2799
2800 count++;
2801 e++;
2802 }
2803
2804 *len = count * sizeof(struct iwinfo_scanlist_entry);
2805 break;
2806 }
2807
2808 close(sock);
2809 unlink(local.sun_path);
2810
2811 return (count >= 0) ? 0 : -1;
2812 }
2813
2814 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
2815 {
2816 char *res;
2817 int rv, mode;
2818
2819 *len = 0;
2820
2821 /* Got a radioX pseudo interface, find some interface on it or create one */
2822 if (!strncmp(ifname, "radio", 5))
2823 {
2824 /* Reuse existing interface */
2825 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2826 {
2827 return nl80211_get_scanlist(res, buf, len);
2828 }
2829
2830 /* Need to spawn a temporary iface for scanning */
2831 else if ((res = nl80211_ifadd(ifname)) != NULL)
2832 {
2833 rv = nl80211_get_scanlist(res, buf, len);
2834 nl80211_ifdel(res);
2835 return rv;
2836 }
2837 }
2838
2839 /* WPA supplicant */
2840 if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
2841 {
2842 return 0;
2843 }
2844
2845 /* station / ad-hoc / monitor scan */
2846 else if (!nl80211_get_mode(ifname, &mode) &&
2847 (mode == IWINFO_OPMODE_ADHOC ||
2848 mode == IWINFO_OPMODE_MASTER ||
2849 mode == IWINFO_OPMODE_CLIENT ||
2850 mode == IWINFO_OPMODE_MONITOR) &&
2851 iwinfo_ifup(ifname))
2852 {
2853 return nl80211_get_scanlist_nl(ifname, buf, len);
2854 }
2855
2856 /* AP scan */
2857 else
2858 {
2859 /* Got a temp interface, don't create yet another one */
2860 if (!strncmp(ifname, "tmp.", 4))
2861 {
2862 if (!iwinfo_ifup(ifname))
2863 return -1;
2864
2865 rv = nl80211_get_scanlist_nl(ifname, buf, len);
2866 iwinfo_ifdown(ifname);
2867 return rv;
2868 }
2869
2870 /* Spawn a new scan interface */
2871 else
2872 {
2873 if (!(res = nl80211_ifadd(ifname)))
2874 return -1;
2875
2876 iwinfo_ifmac(res);
2877
2878 /* if we can take the new interface up, the driver supports an
2879 * additional interface and there's no need to tear down the ap */
2880 if (iwinfo_ifup(res))
2881 {
2882 rv = nl80211_get_scanlist_nl(res, buf, len);
2883 iwinfo_ifdown(res);
2884 }
2885
2886 /* driver cannot create secondary interface, take down ap
2887 * during scan */
2888 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2889 {
2890 rv = nl80211_get_scanlist_nl(res, buf, len);
2891 iwinfo_ifdown(res);
2892 iwinfo_ifup(ifname);
2893 nl80211_hostapd_hup(ifname);
2894 }
2895
2896 nl80211_ifdel(res);
2897 return rv;
2898 }
2899 }
2900
2901 return -1;
2902 }
2903
2904 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2905 {
2906 int bands_remain, freqs_remain;
2907
2908 struct nl80211_array_buf *arr = arg;
2909 struct iwinfo_freqlist_entry *e;
2910
2911 struct nlattr **attr = nl80211_parse(msg);
2912 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2913 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2914 struct nlattr *band, *freq;
2915
2916 e = arr->buf;
2917 e += arr->count;
2918
2919 if (attr[NL80211_ATTR_WIPHY_BANDS]) {
2920 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2921 {
2922 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2923 nla_data(band), nla_len(band), NULL);
2924
2925 if (bands[NL80211_BAND_ATTR_FREQS]) {
2926 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2927 {
2928 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2929 nla_data(freq), nla_len(freq), NULL);
2930
2931 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2932 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2933 continue;
2934
2935 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2936 e->channel = nl80211_freq2channel(e->mhz);
2937
2938 e->restricted = (
2939 freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
2940 !freqs[NL80211_FREQUENCY_ATTR_RADAR]
2941 ) ? 1 : 0;
2942
2943 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_MINUS])
2944 e->flags |= IWINFO_FREQ_NO_HT40MINUS;
2945 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_PLUS])
2946 e->flags |= IWINFO_FREQ_NO_HT40PLUS;
2947 if (freqs[NL80211_FREQUENCY_ATTR_NO_80MHZ])
2948 e->flags |= IWINFO_FREQ_NO_80MHZ;
2949 if (freqs[NL80211_FREQUENCY_ATTR_NO_160MHZ])
2950 e->flags |= IWINFO_FREQ_NO_160MHZ;
2951 if (freqs[NL80211_FREQUENCY_ATTR_NO_20MHZ])
2952 e->flags |= IWINFO_FREQ_NO_20MHZ;
2953 if (freqs[NL80211_FREQUENCY_ATTR_NO_10MHZ])
2954 e->flags |= IWINFO_FREQ_NO_10MHZ;
2955
2956 e++;
2957 arr->count++;
2958 }
2959 }
2960 }
2961 }
2962
2963 return NL_SKIP;
2964 }
2965
2966 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2967 {
2968 struct nl80211_msg_conveyor *cv;
2969 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2970 uint32_t features = nl80211_get_protocol_features(ifname);
2971 int flags;
2972
2973 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
2974 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
2975 if (!cv)
2976 goto out;
2977
2978 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
2979 if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr))
2980 goto out;
2981
2982 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2983 return 0;
2984
2985 nla_put_failure:
2986 nl80211_free(cv);
2987 out:
2988 *len = 0;
2989 return -1;
2990 }
2991
2992 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2993 {
2994 char *buf = arg;
2995 struct nlattr **attr = nl80211_parse(msg);
2996
2997 if (attr[NL80211_ATTR_REG_ALPHA2])
2998 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2999 else
3000 buf[0] = 0;
3001
3002 return NL_SKIP;
3003 }
3004
3005 static int nl80211_get_country(const char *ifname, char *buf)
3006 {
3007 if (nl80211_request(ifname, NL80211_CMD_GET_REG, 0,
3008 nl80211_get_country_cb, buf))
3009 return -1;
3010
3011 return 0;
3012 }
3013
3014 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
3015 {
3016 int count;
3017 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
3018 const struct iwinfo_iso3166_label *l;
3019
3020 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
3021 {
3022 e->iso3166 = l->iso3166;
3023 e->ccode[0] = (l->iso3166 / 256);
3024 e->ccode[1] = (l->iso3166 % 256);
3025 e->ccode[2] = 0;
3026 }
3027
3028 *len = (count * sizeof(struct iwinfo_country_entry));
3029 return 0;
3030 }
3031
3032
3033 struct nl80211_modes
3034 {
3035 bool ok;
3036 uint32_t hw;
3037 uint32_t ht;
3038
3039 uint8_t bands;
3040
3041 uint16_t nl_ht;
3042 uint32_t nl_vht;
3043 uint16_t he_phy_cap[6];
3044 };
3045
3046 static int nl80211_eval_modelist(struct nl80211_modes *m)
3047 {
3048 /* Treat any nonzero capability as 11n */
3049 if (m->nl_ht > 0)
3050 {
3051 m->hw |= IWINFO_80211_N;
3052 m->ht |= IWINFO_HTMODE_HT20;
3053
3054 if (m->nl_ht & (1 << 1))
3055 m->ht |= IWINFO_HTMODE_HT40;
3056 }
3057
3058 if (m->he_phy_cap[0] != 0) {
3059 m->hw |= IWINFO_80211_AX;
3060 m->ht |= IWINFO_HTMODE_HE20;
3061
3062 if (m->he_phy_cap[0] & BIT(9))
3063 m->ht |= IWINFO_HTMODE_HE40;
3064 if (m->he_phy_cap[0] & BIT(10))
3065 m->ht |= IWINFO_HTMODE_HE40 | IWINFO_HTMODE_HE80;
3066 if (m->he_phy_cap[0] & BIT(11))
3067 m->ht |= IWINFO_HTMODE_HE160;
3068 if (m->he_phy_cap[0] & BIT(12))
3069 m->ht |= IWINFO_HTMODE_HE160 | IWINFO_HTMODE_HE80_80;
3070 }
3071
3072 if (m->bands & IWINFO_BAND_24)
3073 {
3074 m->hw |= IWINFO_80211_B;
3075 m->hw |= IWINFO_80211_G;
3076 }
3077
3078 if (m->bands & IWINFO_BAND_5)
3079 {
3080 /* Treat any nonzero capability as 11ac */
3081 if (m->nl_vht > 0)
3082 {
3083 m->hw |= IWINFO_80211_AC;
3084 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
3085
3086 switch ((m->nl_vht >> 2) & 3)
3087 {
3088 case 2:
3089 m->ht |= IWINFO_HTMODE_VHT80_80;
3090 /* fall through */
3091
3092 case 1:
3093 m->ht |= IWINFO_HTMODE_VHT160;
3094 }
3095 }
3096 else
3097 {
3098 m->hw |= IWINFO_80211_A;
3099 }
3100 }
3101
3102 if (m->bands & IWINFO_BAND_60)
3103 {
3104 m->hw |= IWINFO_80211_AD;
3105 }
3106
3107 }
3108
3109 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
3110 {
3111 struct nl80211_modes *m = arg;
3112 int bands_remain, freqs_remain;
3113 uint16_t caps = 0;
3114 uint32_t vht_caps = 0;
3115 struct nlattr **attr = nl80211_parse(msg);
3116 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
3117 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
3118 struct nlattr *band, *freq;
3119 uint32_t freq_mhz;
3120
3121 if (attr[NL80211_ATTR_WIPHY_BANDS])
3122 {
3123 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
3124 {
3125 nla_parse(bands, NL80211_BAND_ATTR_MAX,
3126 nla_data(band), nla_len(band), NULL);
3127
3128 if (bands[NL80211_BAND_ATTR_HT_CAPA])
3129 m->nl_ht = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
3130
3131 if (bands[NL80211_BAND_ATTR_VHT_CAPA])
3132 m->nl_vht = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
3133
3134 if (bands[NL80211_BAND_ATTR_IFTYPE_DATA]) {
3135 struct nlattr *tb[NL80211_BAND_IFTYPE_ATTR_MAX + 1];
3136 struct nlattr *nl_iftype;
3137 int rem_band;
3138 int len;
3139
3140 nla_for_each_nested(nl_iftype, bands[NL80211_BAND_ATTR_IFTYPE_DATA], rem_band) {
3141 nla_parse(tb, NL80211_BAND_IFTYPE_ATTR_MAX,
3142 nla_data(nl_iftype), nla_len(nl_iftype), NULL);
3143 if (tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]) {
3144 len = nla_len(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]);
3145
3146 if (len > sizeof(m->he_phy_cap) - 1)
3147 len = sizeof(m->he_phy_cap) - 1;
3148 memcpy(&((__u8 *)m->he_phy_cap)[1],
3149 nla_data(tb[NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY]),
3150 len);
3151 }
3152 }
3153 }
3154
3155 if (bands[NL80211_BAND_ATTR_FREQS]) {
3156 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
3157 freqs_remain)
3158 {
3159 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
3160 nla_data(freq), nla_len(freq), NULL);
3161
3162 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
3163 continue;
3164
3165 freq_mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
3166
3167 if (freq_mhz > 2400 && freq_mhz < 2485)
3168 {
3169 m->bands |= IWINFO_BAND_24;
3170 }
3171 else if (freq_mhz > 5000 && freq_mhz < 5850)
3172 {
3173 m->bands |= IWINFO_BAND_5;
3174 }
3175 else if (freq_mhz > 6000 && freq_mhz < 7120)
3176 {
3177 m->bands |= IWINFO_BAND_6;
3178 }
3179 else if (freq_mhz >= 56160)
3180 {
3181 m->bands |= IWINFO_BAND_60;
3182 }
3183 }
3184 }
3185 }
3186
3187 m->ok = 1;
3188 }
3189
3190 return NL_SKIP;
3191 }
3192
3193 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
3194 {
3195 struct nl80211_msg_conveyor *cv;
3196 struct nl80211_modes m = {};
3197 uint32_t features = nl80211_get_protocol_features(ifname);
3198 int flags;
3199
3200 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
3201 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
3202 if (!cv)
3203 goto out;
3204
3205 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
3206 if (nl80211_send(cv, nl80211_get_modelist_cb, &m))
3207 goto nla_put_failure;
3208
3209 nl80211_eval_modelist(&m);
3210
3211 *buf = m.hw;
3212
3213 return 0;
3214
3215 nla_put_failure:
3216 nl80211_free(cv);
3217 out:
3218 return -1;
3219 }
3220
3221 struct chan_info {
3222 int width;
3223 int mode;
3224 };
3225
3226 static int nl80211_get_htmode_cb(struct nl_msg *msg, void *arg)
3227 {
3228 struct nlattr **tb = nl80211_parse(msg);
3229 struct nlattr *cur;
3230 struct chan_info *chn = arg;
3231
3232 if ((cur = tb[NL80211_ATTR_CHANNEL_WIDTH]))
3233 chn->width = nla_get_u32(cur);
3234
3235 if ((cur = tb[NL80211_ATTR_BSS_HT_OPMODE]))
3236 chn->mode = nla_get_u32(cur);
3237
3238 return NL_SKIP;
3239 }
3240
3241 static int nl80211_get_htmode(const char *ifname, int *buf)
3242 {
3243 struct chan_info chn = { .width = 0, .mode = 0 };
3244 char *res;
3245 int err;
3246
3247 res = nl80211_phy2ifname(ifname);
3248 *buf = 0;
3249
3250 err = nl80211_request(res ? res : ifname,
3251 NL80211_CMD_GET_INTERFACE, 0,
3252 nl80211_get_htmode_cb, &chn);
3253 if (err)
3254 return -1;
3255
3256 switch (chn.width) {
3257 case NL80211_CHAN_WIDTH_20:
3258 if (chn.mode == -1)
3259 *buf = IWINFO_HTMODE_VHT20;
3260 else
3261 *buf = IWINFO_HTMODE_HT20;
3262 break;
3263 case NL80211_CHAN_WIDTH_40:
3264 if (chn.mode == -1)
3265 *buf = IWINFO_HTMODE_VHT40;
3266 else
3267 *buf = IWINFO_HTMODE_HT40;
3268 break;
3269 case NL80211_CHAN_WIDTH_80:
3270 *buf = IWINFO_HTMODE_VHT80;
3271 break;
3272 case NL80211_CHAN_WIDTH_80P80:
3273 *buf = IWINFO_HTMODE_VHT80_80;
3274 break;
3275 case NL80211_CHAN_WIDTH_160:
3276 *buf = IWINFO_HTMODE_VHT160;
3277 break;
3278 case NL80211_CHAN_WIDTH_5:
3279 case NL80211_CHAN_WIDTH_10:
3280 case NL80211_CHAN_WIDTH_20_NOHT:
3281 *buf = IWINFO_HTMODE_NOHT;
3282 break;
3283 default:
3284 return -1;
3285 }
3286
3287 return 0;
3288 }
3289
3290 static int nl80211_get_htmodelist(const char *ifname, int *buf)
3291 {
3292 struct nl80211_msg_conveyor *cv;
3293 struct nl80211_modes m = {};
3294 uint32_t features = nl80211_get_protocol_features(ifname);
3295 int flags;
3296
3297 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
3298 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
3299 if (!cv)
3300 goto out;
3301
3302 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
3303 if (nl80211_send(cv, nl80211_get_modelist_cb, &m))
3304 goto nla_put_failure;
3305
3306 nl80211_eval_modelist(&m);
3307
3308 *buf = m.ht;
3309
3310 return 0;
3311
3312 nla_put_failure:
3313 nl80211_free(cv);
3314 out:
3315 return -1;
3316 }
3317
3318
3319 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
3320 {
3321 struct nlattr **attr = nl80211_parse(msg);
3322 struct nlattr *comb;
3323 int *ret = arg;
3324 int comb_rem, limit_rem, mode_rem;
3325
3326 *ret = 0;
3327 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
3328 return NL_SKIP;
3329
3330 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
3331 {
3332 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
3333 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
3334 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
3335 };
3336 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1];
3337 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
3338 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
3339 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
3340 };
3341 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1];
3342 struct nlattr *limit;
3343
3344 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy);
3345
3346 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
3347 continue;
3348
3349 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
3350 {
3351 struct nlattr *mode;
3352
3353 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
3354
3355 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
3356 !tb_limit[NL80211_IFACE_LIMIT_MAX])
3357 continue;
3358
3359 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
3360 continue;
3361
3362 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
3363 if (nla_type(mode) == NL80211_IFTYPE_AP)
3364 *ret = 1;
3365 }
3366 }
3367 }
3368
3369 return NL_SKIP;
3370 }
3371
3372 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
3373 {
3374 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
3375 nl80211_get_ifcomb_cb, buf))
3376 return -1;
3377
3378 return 0;
3379 }
3380
3381 static int nl80211_hardware_id_from_fdt(struct iwinfo_hardware_id *id, const char *ifname)
3382 {
3383 char *phy, compat[64], path[PATH_MAX];
3384 int i;
3385
3386 /* Try to determine the phy name from the given interface */
3387 phy = nl80211_ifname2phy(ifname);
3388
3389 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/of_node/compatible",
3390 phy ? "ieee80211" : "net", phy ? phy : ifname);
3391
3392 if (nl80211_readstr(path, compat, sizeof(compat)) <= 0)
3393 return -1;
3394
3395 if (!strcmp(compat, "qca,ar9130-wmac")) {
3396 id->vendor_id = 0x168c;
3397 id->device_id = 0x0029;
3398 id->subsystem_vendor_id = 0x168c;
3399 id->subsystem_device_id = 0x9130;
3400 } else if (!strcmp(compat, "qca,ar9330-wmac")) {
3401 id->vendor_id = 0x168c;
3402 id->device_id = 0x0030;
3403 id->subsystem_vendor_id = 0x168c;
3404 id->subsystem_device_id = 0x9330;
3405 } else if (!strcmp(compat, "qca,ar9340-wmac")) {
3406 id->vendor_id = 0x168c;
3407 id->device_id = 0x0030;
3408 id->subsystem_vendor_id = 0x168c;
3409 id->subsystem_device_id = 0x9340;
3410 } else if (!strcmp(compat, "qca,qca9530-wmac")) {
3411 id->vendor_id = 0x168c;
3412 id->device_id = 0x0033;
3413 id->subsystem_vendor_id = 0x168c;
3414 id->subsystem_device_id = 0x9530;
3415 } else if (!strcmp(compat, "qca,qca9550-wmac")) {
3416 id->vendor_id = 0x168c;
3417 id->device_id = 0x0033;
3418 id->subsystem_vendor_id = 0x168c;
3419 id->subsystem_device_id = 0x9550;
3420 } else if (!strcmp(compat, "qca,qca9560-wmac")) {
3421 id->vendor_id = 0x168c;
3422 id->device_id = 0x0033;
3423 id->subsystem_vendor_id = 0x168c;
3424 id->subsystem_device_id = 0x9560;
3425 } else if (!strcmp(compat, "qcom,ipq4019-wifi")) {
3426 id->vendor_id = 0x168c;
3427 id->device_id = 0x003c;
3428 id->subsystem_vendor_id = 0x168c;
3429 id->subsystem_device_id = 0x4019;
3430 } else if (!strcmp(compat, "mediatek,mt7622-wmac")) {
3431 id->vendor_id = 0x14c3;
3432 id->device_id = 0x7622;
3433 id->subsystem_vendor_id = 0x14c3;
3434 id->subsystem_device_id = 0x7622;
3435 } else if (!strcmp(compat, "mediatek,mt7986-wmac")) {
3436 id->vendor_id = 0x14c3;
3437 id->device_id = 0x7986;
3438 id->subsystem_vendor_id = 0x14c3;
3439 id->subsystem_device_id = 0x7986;
3440 }
3441
3442 return (id->vendor_id && id->device_id) ? 0 : -1;
3443 }
3444
3445
3446 static int nl80211_get_hardware_id(const char *ifname, char *buf)
3447 {
3448 struct iwinfo_hardware_id *id = (struct iwinfo_hardware_id *)buf;
3449 char *phy, num[8], path[PATH_MAX];
3450 int i;
3451
3452 struct { const char *path; uint16_t *dest; } lookup[] = {
3453 { "vendor", &id->vendor_id },
3454 { "device", &id->device_id },
3455 { "subsystem_vendor", &id->subsystem_vendor_id },
3456 { "subsystem_device", &id->subsystem_device_id }
3457 };
3458
3459 memset(id, 0, sizeof(*id));
3460
3461 /* Try to determine the phy name from the given interface */
3462 phy = nl80211_ifname2phy(ifname);
3463
3464 for (i = 0; i < ARRAY_SIZE(lookup); i++)
3465 {
3466 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/%s",
3467 phy ? "ieee80211" : "net",
3468 phy ? phy : ifname, lookup[i].path);
3469
3470 if (nl80211_readstr(path, num, sizeof(num)) > 0)
3471 *lookup[i].dest = strtoul(num, NULL, 16);
3472 }
3473
3474 /* Failed to obtain hardware IDs, try FDT */
3475 if (id->vendor_id == 0 || id->device_id == 0)
3476 if (!nl80211_hardware_id_from_fdt(id, ifname))
3477 return 0;
3478
3479 /* Failed to obtain hardware IDs, search board config */
3480 if (id->vendor_id == 0 || id->device_id == 0)
3481 return iwinfo_hardware_id_from_mtd(id);
3482
3483 return 0;
3484 }
3485
3486 static const struct iwinfo_hardware_entry *
3487 nl80211_get_hardware_entry(const char *ifname)
3488 {
3489 struct iwinfo_hardware_id id;
3490
3491 if (nl80211_get_hardware_id(ifname, (char *)&id))
3492 return NULL;
3493
3494 return iwinfo_hardware(&id);
3495 }
3496
3497 static int nl80211_get_hardware_name(const char *ifname, char *buf)
3498 {
3499 const struct iwinfo_hardware_entry *hw;
3500
3501 if (!(hw = nl80211_get_hardware_entry(ifname)))
3502 sprintf(buf, "Generic MAC80211");
3503 else
3504 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
3505
3506 return 0;
3507 }
3508
3509 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
3510 {
3511 const struct iwinfo_hardware_entry *hw;
3512
3513 if (!(hw = nl80211_get_hardware_entry(ifname)))
3514 return -1;
3515
3516 *buf = hw->txpower_offset;
3517 return 0;
3518 }
3519
3520 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
3521 {
3522 const struct iwinfo_hardware_entry *hw;
3523
3524 if (!(hw = nl80211_get_hardware_entry(ifname)))
3525 return -1;
3526
3527 *buf = hw->frequency_offset;
3528 return 0;
3529 }
3530
3531 static int nl80211_lookup_phyname(const char *section, char *buf)
3532 {
3533 const char *name;
3534 int idx;
3535
3536 if (!strncmp(section, "path=", 5))
3537 idx = nl80211_phy_idx_from_path(section + 5);
3538 else if (!strncmp(section, "macaddr=", 8))
3539 idx = nl80211_phy_idx_from_macaddr(section + 8);
3540 else
3541 idx = nl80211_phy_idx_from_uci(section);
3542
3543 if (idx < 0)
3544 return -1;
3545
3546 name = nl80211_phyidx2name(idx);
3547 if (!name)
3548 return -1;
3549
3550 strcpy(buf, name);
3551 return 0;
3552 }
3553
3554 static int nl80211_phy_path(const char *phyname, const char **path)
3555 {
3556 if (strchr(phyname, '/'))
3557 return -1;
3558
3559 *path = nl80211_phy_path_str(phyname);
3560 if (!*path)
3561 return -1;
3562
3563 return 0;
3564 }
3565
3566 const struct iwinfo_ops nl80211_ops = {
3567 .name = "nl80211",
3568 .probe = nl80211_probe,
3569 .channel = nl80211_get_channel,
3570 .center_chan1 = nl80211_get_center_chan1,
3571 .center_chan2 = nl80211_get_center_chan2,
3572 .frequency = nl80211_get_frequency,
3573 .frequency_offset = nl80211_get_frequency_offset,
3574 .txpower = nl80211_get_txpower,
3575 .txpower_offset = nl80211_get_txpower_offset,
3576 .bitrate = nl80211_get_bitrate,
3577 .signal = nl80211_get_signal,
3578 .noise = nl80211_get_noise,
3579 .quality = nl80211_get_quality,
3580 .quality_max = nl80211_get_quality_max,
3581 .mbssid_support = nl80211_get_mbssid_support,
3582 .hwmodelist = nl80211_get_hwmodelist,
3583 .htmodelist = nl80211_get_htmodelist,
3584 .htmode = nl80211_get_htmode,
3585 .mode = nl80211_get_mode,
3586 .ssid = nl80211_get_ssid,
3587 .bssid = nl80211_get_bssid,
3588 .country = nl80211_get_country,
3589 .hardware_id = nl80211_get_hardware_id,
3590 .hardware_name = nl80211_get_hardware_name,
3591 .encryption = nl80211_get_encryption,
3592 .phyname = nl80211_get_phyname,
3593 .assoclist = nl80211_get_assoclist,
3594 .txpwrlist = nl80211_get_txpwrlist,
3595 .scanlist = nl80211_get_scanlist,
3596 .freqlist = nl80211_get_freqlist,
3597 .countrylist = nl80211_get_countrylist,
3598 .survey = nl80211_get_survey,
3599 .lookup_phy = nl80211_lookup_phyname,
3600 .phy_path = nl80211_phy_path,
3601 .close = nl80211_close
3602 };
Library for accessing wireless device drivers