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iwinfo: detect QCA IPQ4019 WiSoC from FDT
[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 int nl80211_phy_idx_from_uci_path(struct uci_section *s)
237 {
238 size_t linklen, pathlen;
239 char buf[128], *link;
240 struct dirent *e;
241 const char *path;
242 int idx = -1;
243 DIR *d;
244
245 path = uci_lookup_option_string(uci_ctx, s, "path");
246 if (!path)
247 return -1;
248
249 if ((d = opendir("/sys/class/ieee80211")) != NULL)
250 {
251 while ((e = readdir(d)) != NULL)
252 {
253 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/device", e->d_name);
254
255 link = realpath(buf, NULL);
256
257 if (link == NULL)
258 continue;
259
260 linklen = strlen(link);
261 pathlen = strlen(path);
262
263 if (pathlen >= linklen || strcmp(link + (linklen - pathlen), path))
264 linklen = 0;
265
266 free(link);
267
268 if (linklen == 0)
269 continue;
270
271 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", e->d_name);
272
273 idx = nl80211_readint(buf);
274
275 if (idx >= 0)
276 break;
277 }
278
279 closedir(d);
280 }
281
282 return idx;
283 }
284
285 static int nl80211_phy_idx_from_uci_macaddr(struct uci_section *s)
286 {
287 const char *opt;
288 char buf[128];
289 int i, idx = -1;
290 glob_t gl;
291
292 opt = uci_lookup_option_string(uci_ctx, s, "macaddr");
293 if (!opt)
294 return -1;
295
296 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/*"); /**/
297 if (glob(buf, 0, NULL, &gl))
298 return -1;
299
300 for (i = 0; i < gl.gl_pathc; i++)
301 {
302 snprintf(buf, sizeof(buf), "%s/macaddress", gl.gl_pathv[i]);
303 if (nl80211_readstr(buf, buf, sizeof(buf)) <= 0)
304 continue;
305
306 if (fnmatch(opt, buf, FNM_CASEFOLD))
307 continue;
308
309 snprintf(buf, sizeof(buf), "%s/index", gl.gl_pathv[i]);
310 if ((idx = nl80211_readint(buf)) > -1)
311 break;
312 }
313
314 globfree(&gl);
315
316 return idx;
317 }
318
319 static int nl80211_phy_idx_from_uci_phy(struct uci_section *s)
320 {
321 const char *opt;
322 char buf[128];
323
324 opt = uci_lookup_option_string(uci_ctx, s, "phy");
325 if (!opt)
326 return -1;
327
328 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", opt);
329 return nl80211_readint(buf);
330 }
331
332 static int nl80211_phy_idx_from_uci(const char *name)
333 {
334 struct uci_section *s;
335 int idx = -1;
336
337 s = iwinfo_uci_get_radio(name, "mac80211");
338 if (!s)
339 goto free;
340
341 idx = nl80211_phy_idx_from_uci_path(s);
342
343 if (idx < 0)
344 idx = nl80211_phy_idx_from_uci_macaddr(s);
345
346 if (idx < 0)
347 idx = nl80211_phy_idx_from_uci_phy(s);
348
349 free:
350 iwinfo_uci_free();
351 return idx;
352 }
353
354 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
355 int cmd, int flags)
356 {
357 int ifidx = -1, phyidx = -1;
358 struct nl80211_msg_conveyor *cv;
359
360 if (ifname == NULL)
361 return NULL;
362
363 if (nl80211_init() < 0)
364 return NULL;
365
366 if (!strncmp(ifname, "phy", 3))
367 phyidx = atoi(&ifname[3]);
368 else if (!strncmp(ifname, "radio", 5))
369 phyidx = nl80211_phy_idx_from_uci(ifname);
370
371 if (!strncmp(ifname, "mon.", 4))
372 ifidx = if_nametoindex(&ifname[4]);
373 else
374 ifidx = if_nametoindex(ifname);
375
376 /* Valid ifidx must be greater than 0 */
377 if ((ifidx <= 0) && (phyidx < 0))
378 return NULL;
379
380 cv = nl80211_new(nls->nl80211, cmd, flags);
381 if (!cv)
382 return NULL;
383
384 if (ifidx > 0)
385 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
386 else if (phyidx > -1)
387 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
388
389 return cv;
390
391 nla_put_failure:
392 nl80211_free(cv);
393 return NULL;
394 }
395
396 static int nl80211_send(struct nl80211_msg_conveyor *cv,
397 int (*cb_func)(struct nl_msg *, void *),
398 void *cb_arg)
399 {
400 static struct nl80211_msg_conveyor rcv;
401 int err;
402
403 if (cb_func)
404 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
405 else
406 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
407
408 err = nl_send_auto_complete(nls->nl_sock, cv->msg);
409
410 if (err < 0)
411 goto out;
412
413 err = 1;
414
415 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
416 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
417 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
418
419 while (err > 0)
420 nl_recvmsgs(nls->nl_sock, cv->cb);
421
422 out:
423 nl80211_free(cv);
424 return err;
425 }
426
427 static int nl80211_request(const char *ifname, int cmd, int flags,
428 int (*cb_func)(struct nl_msg *, void *),
429 void *cb_arg)
430 {
431 struct nl80211_msg_conveyor *cv;
432
433 cv = nl80211_msg(ifname, cmd, flags);
434
435 if (!cv)
436 return -ENOMEM;
437
438 return nl80211_send(cv, cb_func, cb_arg);
439 }
440
441 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
442 {
443 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
444 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
445
446 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
447 genlmsg_attrlen(gnlh, 0), NULL);
448
449 return attr;
450 }
451
452 static int nl80211_get_protocol_features_cb(struct nl_msg *msg, void *arg)
453 {
454 uint32_t *features = arg;
455 struct nlattr **attr = nl80211_parse(msg);
456
457 if (attr[NL80211_ATTR_PROTOCOL_FEATURES])
458 *features = nla_get_u32(attr[NL80211_ATTR_PROTOCOL_FEATURES]);
459
460 return NL_SKIP;
461 }
462
463 static int nl80211_get_protocol_features(const char *ifname)
464 {
465 struct nl80211_msg_conveyor *req;
466 uint32_t features = 0;
467
468 req = nl80211_msg(ifname, NL80211_CMD_GET_PROTOCOL_FEATURES, 0);
469 if (req) {
470 nl80211_send(req, nl80211_get_protocol_features_cb, &features);
471 nl80211_free(req);
472 }
473
474 return features;
475 }
476
477 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
478 {
479 struct nl80211_group_conveyor *cv = arg;
480
481 struct nlattr **attr = nl80211_parse(msg);
482 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
483 struct nlattr *mgrp;
484 int mgrpidx;
485
486 if (!attr[CTRL_ATTR_MCAST_GROUPS])
487 return NL_SKIP;
488
489 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
490 {
491 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
492 nla_data(mgrp), nla_len(mgrp), NULL);
493
494 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
495 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
496 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
497 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
498 {
499 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
500 break;
501 }
502 }
503
504 return NL_SKIP;
505 }
506
507 static int nl80211_subscribe(const char *family, const char *group)
508 {
509 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
510 struct nl80211_msg_conveyor *req;
511 int err;
512
513 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
514 if (req)
515 {
516 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
517 err = nl80211_send(req, nl80211_subscribe_cb, &cv);
518
519 if (err)
520 return err;
521
522 return nl_socket_add_membership(nls->nl_sock, cv.id);
523
524 nla_put_failure:
525 nl80211_free(req);
526 }
527
528 return -ENOMEM;
529 }
530
531
532 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
533 {
534 struct nl80211_event_conveyor *cv = arg;
535 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
536
537 if (cv->wait[gnlh->cmd / 32] & (1 << (gnlh->cmd % 32)))
538 cv->recv = gnlh->cmd;
539
540 return NL_SKIP;
541 }
542
543 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
544 {
545 return NL_OK;
546 }
547
548 static int __nl80211_wait(const char *family, const char *group, ...)
549 {
550 struct nl80211_event_conveyor cv = { };
551 struct nl_cb *cb;
552 int err = 0;
553 int cmd;
554 va_list ap;
555
556 if (nl80211_subscribe(family, group))
557 return -ENOENT;
558
559 cb = nl_cb_alloc(NL_CB_DEFAULT);
560
561 if (!cb)
562 return -ENOMEM;
563
564 nl_cb_err(cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
565 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
566 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
567
568 va_start(ap, group);
569
570 for (cmd = va_arg(ap, int); cmd != 0; cmd = va_arg(ap, int))
571 cv.wait[cmd / 32] |= (1 << (cmd % 32));
572
573 va_end(ap);
574
575 while (!cv.recv && !err)
576 nl_recvmsgs(nls->nl_sock, cb);
577
578 nl_cb_put(cb);
579
580 return err;
581 }
582
583 #define nl80211_wait(family, group, ...) \
584 __nl80211_wait(family, group, __VA_ARGS__, 0)
585
586
587 static int nl80211_freq2channel(int freq)
588 {
589 if (freq == 2484)
590 return 14;
591 else if (freq < 2484)
592 return (freq - 2407) / 5;
593 else if (freq >= 4910 && freq <= 4980)
594 return (freq - 4000) / 5;
595 else if(freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 6)
596 return (freq - 56160) / 2160;
597 else
598 return (freq - 5000) / 5;
599 }
600
601 static int nl80211_channel2freq(int channel, const char *band)
602 {
603 if (!band || band[0] != 'a')
604 {
605 if (channel == 14)
606 return 2484;
607 else if (channel < 14)
608 return (channel * 5) + 2407;
609 }
610 else if ( strcmp(band, "ad") == 0)
611 {
612 return 56160 + 2160 * channel;
613 }
614 else
615 {
616 if (channel >= 182 && channel <= 196)
617 return (channel * 5) + 4000;
618 else
619 return (channel * 5) + 5000;
620 }
621
622 return 0;
623 }
624
625 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
626 {
627 char *buf = arg;
628 struct nlattr **attr = nl80211_parse(msg);
629
630 if (attr[NL80211_ATTR_WIPHY_NAME])
631 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
632 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
633 else
634 buf[0] = 0;
635
636 return NL_SKIP;
637 }
638
639 static char * nl80211_ifname2phy(const char *ifname)
640 {
641 static char phy[32] = { 0 };
642
643 memset(phy, 0, sizeof(phy));
644
645 nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
646 nl80211_ifname2phy_cb, phy);
647
648 return phy[0] ? phy : NULL;
649 }
650
651 static char * nl80211_phy2ifname(const char *ifname)
652 {
653 int ifidx = -1, cifidx = -1, phyidx = -1;
654 char buffer[64];
655 static char nif[IFNAMSIZ] = { 0 };
656
657 DIR *d;
658 struct dirent *e;
659
660 /* Only accept phy name of the form phy%d or radio%d */
661 if (!ifname)
662 return NULL;
663 else if (!strncmp(ifname, "phy", 3))
664 phyidx = atoi(&ifname[3]);
665 else if (!strncmp(ifname, "radio", 5))
666 phyidx = nl80211_phy_idx_from_uci(ifname);
667 else
668 return NULL;
669
670 memset(nif, 0, sizeof(nif));
671
672 if (phyidx > -1)
673 {
674 if ((d = opendir("/sys/class/net")) != NULL)
675 {
676 while ((e = readdir(d)) != NULL)
677 {
678 snprintf(buffer, sizeof(buffer),
679 "/sys/class/net/%s/phy80211/index", e->d_name);
680
681 if (nl80211_readint(buffer) == phyidx)
682 {
683 snprintf(buffer, sizeof(buffer),
684 "/sys/class/net/%s/ifindex", e->d_name);
685
686 if ((cifidx = nl80211_readint(buffer)) >= 0 &&
687 ((ifidx < 0) || (cifidx < ifidx)))
688 {
689 ifidx = cifidx;
690 strncpy(nif, e->d_name, sizeof(nif) - 1);
691 }
692 }
693 }
694
695 closedir(d);
696 }
697 }
698
699 return nif[0] ? nif : NULL;
700 }
701
702 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
703 {
704 int *mode = arg;
705 struct nlattr **tb = nl80211_parse(msg);
706 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
707 IWINFO_OPMODE_UNKNOWN, /* unspecified */
708 IWINFO_OPMODE_ADHOC, /* IBSS */
709 IWINFO_OPMODE_CLIENT, /* managed */
710 IWINFO_OPMODE_MASTER, /* AP */
711 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
712 IWINFO_OPMODE_WDS, /* WDS */
713 IWINFO_OPMODE_MONITOR, /* monitor */
714 IWINFO_OPMODE_MESHPOINT, /* mesh point */
715 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
716 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
717 };
718
719 if (tb[NL80211_ATTR_IFTYPE])
720 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
721
722 return NL_SKIP;
723 }
724
725
726 static int nl80211_get_mode(const char *ifname, int *buf)
727 {
728 char *res;
729
730 *buf = IWINFO_OPMODE_UNKNOWN;
731
732 res = nl80211_phy2ifname(ifname);
733
734 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
735 nl80211_get_mode_cb, buf);
736
737 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
738 }
739
740 static int __nl80211_hostapd_query(const char *ifname, ...)
741 {
742 va_list ap, ap_cur;
743 char *phy, *search, *dest, *key, *val, buf[128];
744 int len, mode, found = 0, match = 1;
745 FILE *fp;
746
747 if (nl80211_get_mode(ifname, &mode))
748 return 0;
749
750 if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN)
751 return 0;
752
753 phy = nl80211_ifname2phy(ifname);
754
755 if (!phy)
756 return 0;
757
758 snprintf(buf, sizeof(buf), "/var/run/hostapd-%s.conf", phy);
759 fp = fopen(buf, "r");
760
761 if (!fp)
762 return 0;
763
764 va_start(ap, ifname);
765
766 /* clear all destination buffers */
767 va_copy(ap_cur, ap);
768
769 while ((search = va_arg(ap_cur, char *)) != NULL)
770 {
771 dest = va_arg(ap_cur, char *);
772 len = va_arg(ap_cur, int);
773
774 memset(dest, 0, len);
775 }
776
777 va_end(ap_cur);
778
779 /* iterate applicable lines and copy found values into dest buffers */
780 while (fgets(buf, sizeof(buf), fp))
781 {
782 key = strtok(buf, " =\t\n");
783 val = strtok(NULL, "\n");
784
785 if (!key || !val || !*key || *key == '#')
786 continue;
787
788 if (!strcmp(key, "interface") || !strcmp(key, "bss"))
789 match = !strcmp(ifname, val);
790
791 if (!match)
792 continue;
793
794 va_copy(ap_cur, ap);
795
796 while ((search = va_arg(ap_cur, char *)) != NULL)
797 {
798 dest = va_arg(ap_cur, char *);
799 len = va_arg(ap_cur, int);
800
801 if (!strcmp(search, key))
802 {
803 strncpy(dest, val, len - 1);
804 found++;
805 break;
806 }
807 }
808
809 va_end(ap_cur);
810 }
811
812 fclose(fp);
813
814 va_end(ap);
815
816 return found;
817 }
818
819 #define nl80211_hostapd_query(ifname, ...) \
820 __nl80211_hostapd_query(ifname, ##__VA_ARGS__, NULL)
821
822
823 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
824 {
825 fd_set rfds;
826 struct timeval tv = { 0, 256000 };
827
828 FD_ZERO(&rfds);
829 FD_SET(sock, &rfds);
830
831 memset(buf, 0, blen);
832
833 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
834 return -1;
835
836 if (!FD_ISSET(sock, &rfds))
837 return -1;
838
839 return recv(sock, buf, blen - 1, 0);
840 }
841
842 static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local)
843 {
844 struct sockaddr_un remote = { 0 };
845 size_t remote_length, local_length;
846
847 int sock = socket(PF_UNIX, SOCK_DGRAM, 0);
848 if (sock < 0)
849 return sock;
850
851 remote.sun_family = AF_UNIX;
852 remote_length = sizeof(remote.sun_family) +
853 sprintf(remote.sun_path, "/var/run/wpa_supplicant-%s/%s",
854 ifname, ifname);
855
856 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
857 {
858 close(sock);
859 return -1;
860 }
861
862 if (connect(sock, (struct sockaddr *)&remote, remote_length))
863 {
864 remote_length = sizeof(remote.sun_family) +
865 sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname);
866
867 if (connect(sock, (struct sockaddr *)&remote, remote_length))
868 {
869 close(sock);
870 return -1;
871 }
872 }
873
874 local->sun_family = AF_UNIX;
875 local_length = sizeof(local->sun_family) +
876 sprintf(local->sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
877
878 if (bind(sock, (struct sockaddr *)local, local_length) < 0)
879 {
880 close(sock);
881 return -1;
882 }
883
884 return sock;
885 }
886
887 static int __nl80211_wpactl_query(const char *ifname, ...)
888 {
889 va_list ap, ap_cur;
890 struct sockaddr_un local = { 0 };
891 int len, mode, found = 0, sock = -1;
892 char *search, *dest, *key, *val, *line, *pos, buf[512];
893
894 if (nl80211_get_mode(ifname, &mode))
895 return 0;
896
897 if (mode != IWINFO_OPMODE_CLIENT &&
898 mode != IWINFO_OPMODE_ADHOC &&
899 mode != IWINFO_OPMODE_MESHPOINT)
900 return 0;
901
902 sock = nl80211_wpactl_connect(ifname, &local);
903
904 if (sock < 0)
905 return 0;
906
907 va_start(ap, ifname);
908
909 /* clear all destination buffers */
910 va_copy(ap_cur, ap);
911
912 while ((search = va_arg(ap_cur, char *)) != NULL)
913 {
914 dest = va_arg(ap_cur, char *);
915 len = va_arg(ap_cur, int);
916
917 memset(dest, 0, len);
918 }
919
920 va_end(ap_cur);
921
922 send(sock, "STATUS", 6, 0);
923
924 while (true)
925 {
926 if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0)
927 break;
928
929 if (buf[0] == '<')
930 continue;
931
932 for (line = strtok_r(buf, "\n", &pos);
933 line != NULL;
934 line = strtok_r(NULL, "\n", &pos))
935 {
936 key = strtok(line, "=");
937 val = strtok(NULL, "\n");
938
939 if (!key || !val)
940 continue;
941
942 va_copy(ap_cur, ap);
943
944 while ((search = va_arg(ap_cur, char *)) != NULL)
945 {
946 dest = va_arg(ap_cur, char *);
947 len = va_arg(ap_cur, int);
948
949 if (!strcmp(search, key))
950 {
951 strncpy(dest, val, len - 1);
952 found++;
953 break;
954 }
955 }
956
957 va_end(ap_cur);
958 }
959
960 break;
961 }
962
963 va_end(ap);
964
965 close(sock);
966 unlink(local.sun_path);
967
968 return found;
969 }
970
971 #define nl80211_wpactl_query(ifname, ...) \
972 __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL)
973
974
975 static char * nl80211_ifadd(const char *ifname)
976 {
977 char path[PATH_MAX];
978 static char nif[IFNAMSIZ] = { 0 };
979 struct nl80211_msg_conveyor *req;
980 FILE *sysfs;
981
982 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
983 if (req)
984 {
985 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
986
987 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
988 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
989
990 nl80211_send(req, NULL, NULL);
991
992 snprintf(path, sizeof(path) - 1,
993 "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif);
994
995 if ((sysfs = fopen(path, "w")) != NULL)
996 {
997 fwrite("0\n", 1, 2, sysfs);
998 fclose(sysfs);
999 }
1000
1001 return nif;
1002
1003 nla_put_failure:
1004 nl80211_free(req);
1005 }
1006
1007 return NULL;
1008 }
1009
1010 static void nl80211_ifdel(const char *ifname)
1011 {
1012 struct nl80211_msg_conveyor *req;
1013 int err;
1014
1015 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
1016 if (req)
1017 {
1018 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
1019
1020 nl80211_send(req, NULL, NULL);
1021 return;
1022
1023 nla_put_failure:
1024 nl80211_free(req);
1025 }
1026 }
1027
1028 static void nl80211_hostapd_hup(const char *ifname)
1029 {
1030 int fd, pid = 0;
1031 char buf[32];
1032 char *phy = nl80211_ifname2phy(ifname);
1033
1034 if (phy)
1035 {
1036 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
1037 if ((fd = open(buf, O_RDONLY)) >= 0)
1038 {
1039 if (read(fd, buf, sizeof(buf)) > 0)
1040 pid = atoi(buf);
1041
1042 close(fd);
1043 }
1044
1045 if (pid > 0)
1046 kill(pid, 1);
1047 }
1048 }
1049
1050
1051 static int nl80211_probe(const char *ifname)
1052 {
1053 return !!nl80211_ifname2phy(ifname);
1054 }
1055
1056 struct nl80211_ssid_bssid {
1057 unsigned char *ssid;
1058 unsigned char bssid[7];
1059 };
1060
1061 static int nl80211_get_macaddr_cb(struct nl_msg *msg, void *arg)
1062 {
1063 struct nl80211_ssid_bssid *sb = arg;
1064 struct nlattr **tb = nl80211_parse(msg);
1065
1066 if (tb[NL80211_ATTR_MAC]) {
1067 sb->bssid[0] = 1;
1068 memcpy(sb->bssid + 1, nla_data(tb[NL80211_ATTR_MAC]),
1069 sizeof(sb->bssid) - 1);
1070 }
1071
1072 return NL_SKIP;
1073 }
1074
1075 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
1076 {
1077 int ielen;
1078 unsigned char *ie;
1079 struct nl80211_ssid_bssid *sb = arg;
1080 struct nlattr **tb = nl80211_parse(msg);
1081 struct nlattr *bss[NL80211_BSS_MAX + 1];
1082
1083 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1084 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
1085 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1086 };
1087
1088 if (!tb[NL80211_ATTR_BSS] ||
1089 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1090 bss_policy) ||
1091 !bss[NL80211_BSS_BSSID] ||
1092 !bss[NL80211_BSS_STATUS] ||
1093 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
1094 {
1095 return NL_SKIP;
1096 }
1097
1098 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
1099 {
1100 case NL80211_BSS_STATUS_ASSOCIATED:
1101 case NL80211_BSS_STATUS_AUTHENTICATED:
1102 case NL80211_BSS_STATUS_IBSS_JOINED:
1103
1104 if (sb->ssid)
1105 {
1106 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1107 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1108
1109 while (ielen >= 2 && ielen >= ie[1])
1110 {
1111 if (ie[0] == 0)
1112 {
1113 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1114 return NL_SKIP;
1115 }
1116
1117 ielen -= ie[1] + 2;
1118 ie += ie[1] + 2;
1119 }
1120 }
1121 else
1122 {
1123 sb->bssid[0] = 1;
1124 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
1125 return NL_SKIP;
1126 }
1127
1128 default:
1129 return NL_SKIP;
1130 }
1131 }
1132
1133 static int nl80211_get_ssid(const char *ifname, char *buf)
1134 {
1135 char *res;
1136 struct nl80211_ssid_bssid sb = { .ssid = (unsigned char *)buf };
1137
1138 /* try to find ssid from scan dump results */
1139 res = nl80211_phy2ifname(ifname);
1140 sb.ssid[0] = 0;
1141
1142 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1143 nl80211_get_ssid_bssid_cb, &sb);
1144
1145 /* failed, try to find from hostapd info */
1146 if (sb.ssid[0] == 0)
1147 nl80211_hostapd_query(ifname, "ssid", sb.ssid,
1148 IWINFO_ESSID_MAX_SIZE + 1);
1149
1150 /* failed, try to obtain Mesh ID */
1151 if (sb.ssid[0] == 0)
1152 iwinfo_ubus_query(res ? res : ifname, "mesh_id",
1153 sb.ssid, IWINFO_ESSID_MAX_SIZE + 1);
1154
1155 return (sb.ssid[0] == 0) ? -1 : 0;
1156 }
1157
1158 static int nl80211_get_bssid(const char *ifname, char *buf)
1159 {
1160 char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")];
1161 struct nl80211_ssid_bssid sb = { };
1162
1163 res = nl80211_phy2ifname(ifname);
1164
1165 /* try to obtain mac address via NL80211_CMD_GET_INTERFACE */
1166 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1167 nl80211_get_macaddr_cb, &sb);
1168
1169 /* failed, try to find bssid from scan dump results */
1170 if (sb.bssid[0] == 0)
1171 nl80211_request(res ? res : ifname,
1172 NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1173 nl80211_get_ssid_bssid_cb, &sb);
1174
1175 /* failed, try to find mac from hostapd info */
1176 if ((sb.bssid[0] == 0) &&
1177 nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid)))
1178 {
1179 sb.bssid[0] = 1;
1180 sb.bssid[1] = strtol(&bssid[0], NULL, 16);
1181 sb.bssid[2] = strtol(&bssid[3], NULL, 16);
1182 sb.bssid[3] = strtol(&bssid[6], NULL, 16);
1183 sb.bssid[4] = strtol(&bssid[9], NULL, 16);
1184 sb.bssid[5] = strtol(&bssid[12], NULL, 16);
1185 sb.bssid[6] = strtol(&bssid[15], NULL, 16);
1186 }
1187
1188 if (sb.bssid[0])
1189 {
1190 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
1191 sb.bssid[1], sb.bssid[2], sb.bssid[3],
1192 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
1193
1194 return 0;
1195 }
1196
1197 return -1;
1198 }
1199
1200
1201 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
1202 {
1203 int *freq = arg;
1204 struct nlattr **attr = nl80211_parse(msg);
1205 struct nlattr *binfo[NL80211_BSS_MAX + 1];
1206
1207 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1208 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1209 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1210 };
1211
1212 if (attr[NL80211_ATTR_BSS] &&
1213 !nla_parse_nested(binfo, NL80211_BSS_MAX,
1214 attr[NL80211_ATTR_BSS], bss_policy))
1215 {
1216 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
1217 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
1218 }
1219
1220 return NL_SKIP;
1221 }
1222
1223 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
1224 {
1225 int *freq = arg;
1226 struct nlattr **tb = nl80211_parse(msg);
1227
1228 if (tb[NL80211_ATTR_WIPHY_FREQ])
1229 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
1230
1231 return NL_SKIP;
1232 }
1233
1234 static int nl80211_get_frequency(const char *ifname, int *buf)
1235 {
1236 char *res, channel[4], hwmode[3];
1237
1238 /* try to find frequency from interface info */
1239 res = nl80211_phy2ifname(ifname);
1240 *buf = 0;
1241
1242 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1243 nl80211_get_frequency_info_cb, buf);
1244
1245 /* failed, try to find frequency from hostapd info */
1246 if ((*buf == 0) &&
1247 nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode),
1248 "channel", channel, sizeof(channel)) == 2)
1249 {
1250 *buf = nl80211_channel2freq(atoi(channel), hwmode);
1251 }
1252
1253 /* failed, try to find frequency from scan results */
1254 if (*buf == 0)
1255 {
1256 res = nl80211_phy2ifname(ifname);
1257
1258 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1259 nl80211_get_frequency_scan_cb, buf);
1260 }
1261
1262 return (*buf == 0) ? -1 : 0;
1263 }
1264
1265 static int nl80211_get_channel(const char *ifname, int *buf)
1266 {
1267 if (!nl80211_get_frequency(ifname, buf))
1268 {
1269 *buf = nl80211_freq2channel(*buf);
1270 return 0;
1271 }
1272
1273 return -1;
1274 }
1275
1276 static int nl80211_get_txpower_cb(struct nl_msg *msg, void *arg)
1277 {
1278 int *buf = arg;
1279 struct nlattr **tb = nl80211_parse(msg);
1280
1281 if (tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL])
1282 *buf = iwinfo_mbm2dbm(nla_get_u32(tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL]));
1283
1284 return NL_SKIP;
1285 }
1286
1287 static int nl80211_get_txpower(const char *ifname, int *buf)
1288 {
1289 char *res;
1290
1291 res = nl80211_phy2ifname(ifname);
1292 *buf = 0;
1293
1294 if (nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1295 nl80211_get_txpower_cb, buf))
1296 return -1;
1297
1298 return 0;
1299 }
1300
1301
1302 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1303 {
1304 int8_t dbm;
1305 int16_t mbit;
1306 struct nl80211_rssi_rate *rr = arg;
1307 struct nlattr **attr = nl80211_parse(msg);
1308 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1309 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1310
1311 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1312 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1313 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1314 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1315 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1316 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1317 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1318 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1319 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1320 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1321 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1322 };
1323
1324 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1325 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1326 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1327 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1328 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1329 };
1330
1331 if (attr[NL80211_ATTR_STA_INFO])
1332 {
1333 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1334 attr[NL80211_ATTR_STA_INFO], stats_policy))
1335 {
1336 if (sinfo[NL80211_STA_INFO_SIGNAL])
1337 {
1338 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1339 rr->rssi = (rr->rssi * rr->rssi_samples + dbm) / (rr->rssi_samples + 1);
1340 rr->rssi_samples++;
1341 }
1342
1343 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1344 {
1345 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1346 sinfo[NL80211_STA_INFO_TX_BITRATE],
1347 rate_policy))
1348 {
1349 if (rinfo[NL80211_RATE_INFO_BITRATE])
1350 {
1351 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1352 rr->rate = (rr->rate * rr->rate_samples + mbit) / (rr->rate_samples + 1);
1353 rr->rate_samples++;
1354 }
1355 }
1356 }
1357 }
1358 }
1359
1360 return NL_SKIP;
1361 }
1362
1363 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1364 {
1365 DIR *d;
1366 struct dirent *de;
1367
1368 memset(r, 0, sizeof(*r));
1369
1370 if ((d = opendir("/sys/class/net")) != NULL)
1371 {
1372 while ((de = readdir(d)) != NULL)
1373 {
1374 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1375 (!de->d_name[strlen(ifname)] ||
1376 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1377 {
1378 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
1379 NLM_F_DUMP, nl80211_fill_signal_cb, r);
1380 }
1381 }
1382
1383 closedir(d);
1384 }
1385 }
1386
1387 static int nl80211_get_bitrate(const char *ifname, int *buf)
1388 {
1389 struct nl80211_rssi_rate rr;
1390
1391 nl80211_fill_signal(ifname, &rr);
1392
1393 if (rr.rate_samples)
1394 {
1395 *buf = (rr.rate * 100);
1396 return 0;
1397 }
1398
1399 return -1;
1400 }
1401
1402 static int nl80211_get_signal(const char *ifname, int *buf)
1403 {
1404 struct nl80211_rssi_rate rr;
1405
1406 nl80211_fill_signal(ifname, &rr);
1407
1408 if (rr.rssi_samples)
1409 {
1410 *buf = rr.rssi;
1411 return 0;
1412 }
1413
1414 return -1;
1415 }
1416
1417 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1418 {
1419 int8_t *noise = arg;
1420 struct nlattr **tb = nl80211_parse(msg);
1421 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1422
1423 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1424 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1425 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1426 };
1427
1428 if (!tb[NL80211_ATTR_SURVEY_INFO])
1429 return NL_SKIP;
1430
1431 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1432 tb[NL80211_ATTR_SURVEY_INFO], sp))
1433 return NL_SKIP;
1434
1435 if (!si[NL80211_SURVEY_INFO_NOISE])
1436 return NL_SKIP;
1437
1438 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1439 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1440
1441 return NL_SKIP;
1442 }
1443
1444
1445 static int nl80211_get_noise(const char *ifname, int *buf)
1446 {
1447 int8_t noise = 0;
1448
1449 if (nl80211_request(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP,
1450 nl80211_get_noise_cb, &noise))
1451 goto out;
1452
1453 *buf = noise;
1454 return 0;
1455
1456 out:
1457 *buf = 0;
1458 return -1;
1459 }
1460
1461 static int nl80211_get_quality(const char *ifname, int *buf)
1462 {
1463 int signal;
1464
1465 if (!nl80211_get_signal(ifname, &signal))
1466 {
1467 /* A positive signal level is usually just a quality
1468 * value, pass through as-is */
1469 if (signal >= 0)
1470 {
1471 *buf = signal;
1472 }
1473
1474 /* The cfg80211 wext compat layer assumes a signal range
1475 * of -110 dBm to -40 dBm, the quality value is derived
1476 * by adding 110 to the signal level */
1477 else
1478 {
1479 if (signal < -110)
1480 signal = -110;
1481 else if (signal > -40)
1482 signal = -40;
1483
1484 *buf = (signal + 110);
1485 }
1486
1487 return 0;
1488 }
1489
1490 return -1;
1491 }
1492
1493 static int nl80211_get_quality_max(const char *ifname, int *buf)
1494 {
1495 /* The cfg80211 wext compat layer assumes a maximum
1496 * quality of 70 */
1497 *buf = 70;
1498
1499 return 0;
1500 }
1501
1502 static int nl80211_check_wepkey(const char *key)
1503 {
1504 if (key && *key)
1505 {
1506 switch (strlen(key))
1507 {
1508 case 5:
1509 case 10:
1510 return IWINFO_CIPHER_WEP40;
1511
1512 case 13:
1513 case 26:
1514 return IWINFO_CIPHER_WEP104;
1515 }
1516 }
1517
1518 return 0;
1519 }
1520
1521 static struct {
1522 const char *match;
1523 int version;
1524 int suite;
1525 } wpa_key_mgmt_strings[] = {
1526 { "IEEE 802.1X/EAP", 0, IWINFO_KMGMT_8021x },
1527 { "EAP-SUITE-B-192", 4, IWINFO_KMGMT_8021x },
1528 { "EAP-SUITE-B", 4, IWINFO_KMGMT_8021x },
1529 { "EAP-SHA256", 0, IWINFO_KMGMT_8021x },
1530 { "PSK-SHA256", 0, IWINFO_KMGMT_PSK },
1531 { "NONE", 0, IWINFO_KMGMT_NONE },
1532 { "None", 0, IWINFO_KMGMT_NONE },
1533 { "PSK", 0, IWINFO_KMGMT_PSK },
1534 { "EAP", 0, IWINFO_KMGMT_8021x },
1535 { "SAE", 4, IWINFO_KMGMT_SAE },
1536 { "OWE", 4, IWINFO_KMGMT_OWE }
1537 };
1538
1539 static void parse_wpa_suites(const char *str, int defversion,
1540 uint8_t *versions, uint8_t *suites)
1541 {
1542 size_t l;
1543 int i, version;
1544 const char *p, *q, *m, *sep = " \t\n,-+/";
1545
1546 for (p = str; *p; )
1547 {
1548 q = p;
1549
1550 for (i = 0; i < ARRAY_SIZE(wpa_key_mgmt_strings); i++)
1551 {
1552 m = wpa_key_mgmt_strings[i].match;
1553 l = strlen(m);
1554
1555 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l])))
1556 {
1557 if (wpa_key_mgmt_strings[i].version != 0)
1558 version = wpa_key_mgmt_strings[i].version;
1559 else
1560 version = defversion;
1561
1562 *versions |= version;
1563 *suites |= wpa_key_mgmt_strings[i].suite;
1564
1565 q += l;
1566 break;
1567 }
1568 }
1569
1570 if (q == p)
1571 q += strcspn(q, sep);
1572
1573 p = q + strspn(q, sep);
1574 }
1575 }
1576
1577 static struct {
1578 const char *match;
1579 int cipher;
1580 } wpa_cipher_strings[] = {
1581 { "WEP-104", IWINFO_CIPHER_WEP104 },
1582 { "WEP-40", IWINFO_CIPHER_WEP40 },
1583 { "NONE", IWINFO_CIPHER_NONE },
1584 { "TKIP", IWINFO_CIPHER_TKIP },
1585 { "CCMP", IWINFO_CIPHER_CCMP }
1586 };
1587
1588 static void parse_wpa_ciphers(const char *str, uint8_t *ciphers)
1589 {
1590 int i;
1591 size_t l;
1592 const char *m, *p, *q, *sep = " \t\n,-+/";
1593
1594 for (p = str; *p; )
1595 {
1596 q = p;
1597
1598 for (i = 0; i < ARRAY_SIZE(wpa_cipher_strings); i++)
1599 {
1600 m = wpa_cipher_strings[i].match;
1601 l = strlen(m);
1602
1603 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l])))
1604 {
1605 *ciphers |= wpa_cipher_strings[i].cipher;
1606
1607 q += l;
1608 break;
1609 }
1610 }
1611
1612 if (q == p)
1613 q += strcspn(q, sep);
1614
1615 p = q + strspn(q, sep);
1616 }
1617 }
1618
1619 static int nl80211_get_encryption(const char *ifname, char *buf)
1620 {
1621 char *p;
1622 int opmode;
1623 uint8_t wpa_version = 0;
1624 char wpa[2], wpa_key_mgmt[64], wpa_pairwise[16], wpa_groupwise[16];
1625 char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27];
1626 char mode[16];
1627
1628 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1629
1630 /* WPA supplicant */
1631 if (nl80211_wpactl_query(ifname,
1632 "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise),
1633 "group_cipher", wpa_groupwise, sizeof(wpa_groupwise),
1634 "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1635 "mode", mode, sizeof(mode)))
1636 {
1637 /* WEP or Open */
1638 if (!strcmp(wpa_key_mgmt, "NONE"))
1639 {
1640 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1641 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers);
1642
1643 if (c->pair_ciphers != 0 && c->pair_ciphers != IWINFO_CIPHER_NONE) {
1644 c->enabled = 1;
1645 c->auth_suites = IWINFO_KMGMT_NONE;
1646 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1647 }
1648 else {
1649 c->pair_ciphers = 0;
1650 c->group_ciphers = 0;
1651 }
1652 }
1653
1654 /* MESH with SAE */
1655 else if (!strcmp(mode, "mesh") && !strcmp(wpa_key_mgmt, "UNKNOWN"))
1656 {
1657 c->enabled = 1;
1658 c->wpa_version = 4;
1659 c->auth_suites = IWINFO_KMGMT_SAE;
1660 c->pair_ciphers = IWINFO_CIPHER_CCMP;
1661 c->group_ciphers = IWINFO_CIPHER_CCMP;
1662 }
1663
1664 /* WPA */
1665 else
1666 {
1667 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1668 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers);
1669
1670 p = wpa_key_mgmt;
1671
1672 if (!strncmp(p, "WPA2-", 5) || !strncmp(p, "WPA2/", 5))
1673 {
1674 p += 5;
1675 wpa_version = 2;
1676 }
1677 else if (!strncmp(p, "WPA-", 4))
1678 {
1679 p += 4;
1680 wpa_version = 1;
1681 }
1682
1683 parse_wpa_suites(p, wpa_version, &c->wpa_version, &c->auth_suites);
1684
1685 c->enabled = !!(c->wpa_version && c->auth_suites);
1686 }
1687
1688 return 0;
1689 }
1690
1691 /* Hostapd */
1692 else if (nl80211_hostapd_query(ifname,
1693 "wpa", wpa, sizeof(wpa),
1694 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1695 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise),
1696 "auth_algs", auth_algs, sizeof(auth_algs),
1697 "wep_key0", wep_key0, sizeof(wep_key0),
1698 "wep_key1", wep_key1, sizeof(wep_key1),
1699 "wep_key2", wep_key2, sizeof(wep_key2),
1700 "wep_key3", wep_key3, sizeof(wep_key3)))
1701 {
1702 c->wpa_version = 0;
1703
1704 if (wpa_key_mgmt[0])
1705 {
1706 for (p = strtok(wpa_key_mgmt, " \t"); p != NULL; p = strtok(NULL, " \t"))
1707 {
1708 if (!strncmp(p, "WPA-", 4))
1709 p += 4;
1710
1711 parse_wpa_suites(p, atoi(wpa), &c->wpa_version, &c->auth_suites);
1712 }
1713
1714 c->enabled = c->wpa_version ? 1 : 0;
1715 }
1716
1717 if (wpa_pairwise[0])
1718 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1719
1720 if (auth_algs[0])
1721 {
1722 switch (atoi(auth_algs))
1723 {
1724 case 1:
1725 c->auth_algs |= IWINFO_AUTH_OPEN;
1726 break;
1727
1728 case 2:
1729 c->auth_algs |= IWINFO_AUTH_SHARED;
1730 break;
1731
1732 case 3:
1733 c->auth_algs |= IWINFO_AUTH_OPEN;
1734 c->auth_algs |= IWINFO_AUTH_SHARED;
1735 break;
1736 }
1737
1738 c->pair_ciphers |= nl80211_check_wepkey(wep_key0);
1739 c->pair_ciphers |= nl80211_check_wepkey(wep_key1);
1740 c->pair_ciphers |= nl80211_check_wepkey(wep_key2);
1741 c->pair_ciphers |= nl80211_check_wepkey(wep_key3);
1742
1743 c->enabled = (c->auth_algs && c->pair_ciphers) ? 1 : 0;
1744 }
1745
1746 c->group_ciphers = c->pair_ciphers;
1747
1748 return 0;
1749 }
1750
1751 /* Ad-Hoc or Mesh interfaces without wpa_supplicant are open */
1752 else if (!nl80211_get_mode(ifname, &opmode) &&
1753 (opmode == IWINFO_OPMODE_ADHOC ||
1754 opmode == IWINFO_OPMODE_MESHPOINT))
1755 {
1756 c->enabled = 0;
1757
1758 return 0;
1759 }
1760
1761
1762 return -1;
1763 }
1764
1765 static int nl80211_get_phyname(const char *ifname, char *buf)
1766 {
1767 const char *name;
1768
1769 name = nl80211_ifname2phy(ifname);
1770
1771 if (name)
1772 {
1773 strcpy(buf, name);
1774 return 0;
1775 }
1776 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1777 {
1778 name = nl80211_ifname2phy(name);
1779
1780 if (name)
1781 {
1782 strcpy(buf, ifname);
1783 return 0;
1784 }
1785 }
1786
1787 return -1;
1788 }
1789
1790
1791 static void nl80211_parse_rateinfo(struct nlattr **ri,
1792 struct iwinfo_rate_entry *re)
1793 {
1794 if (ri[NL80211_RATE_INFO_BITRATE32])
1795 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100;
1796 else if (ri[NL80211_RATE_INFO_BITRATE])
1797 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100;
1798
1799 if (ri[NL80211_RATE_INFO_VHT_MCS])
1800 {
1801 re->is_vht = 1;
1802 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]);
1803
1804 if (ri[NL80211_RATE_INFO_VHT_NSS])
1805 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]);
1806 }
1807 else if (ri[NL80211_RATE_INFO_MCS])
1808 {
1809 re->is_ht = 1;
1810 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]);
1811 }
1812
1813 if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH])
1814 re->mhz = 5;
1815 else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH])
1816 re->mhz = 10;
1817 else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH])
1818 re->mhz = 40;
1819 else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH])
1820 re->mhz = 80;
1821 else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] ||
1822 ri[NL80211_RATE_INFO_160_MHZ_WIDTH])
1823 re->mhz = 160;
1824 else
1825 re->mhz = 20;
1826
1827 if (ri[NL80211_RATE_INFO_SHORT_GI])
1828 re->is_short_gi = 1;
1829
1830 re->is_40mhz = (re->mhz == 40);
1831 }
1832
1833 static int nl80211_get_survey_cb(struct nl_msg *msg, void *arg)
1834 {
1835 struct nl80211_array_buf *arr = arg;
1836 struct iwinfo_survey_entry *e = arr->buf;
1837 struct nlattr **attr = nl80211_parse(msg);
1838 struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
1839 int rc;
1840
1841 static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
1842 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1843 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1844 [NL80211_SURVEY_INFO_TIME] = { .type = NLA_U64 },
1845 [NL80211_SURVEY_INFO_TIME_BUSY] = { .type = NLA_U64 },
1846 [NL80211_SURVEY_INFO_TIME_EXT_BUSY] = { .type = NLA_U64 },
1847 [NL80211_SURVEY_INFO_TIME_RX] = { .type = NLA_U64 },
1848 [NL80211_SURVEY_INFO_TIME_TX] = { .type = NLA_U64 },
1849 };
1850
1851 rc = nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
1852 attr[NL80211_ATTR_SURVEY_INFO],
1853 survey_policy);
1854 if (rc)
1855 return NL_SKIP;
1856
1857 /* advance to end of array */
1858 e += arr->count;
1859 memset(e, 0, sizeof(*e));
1860
1861 if (sinfo[NL80211_SURVEY_INFO_FREQUENCY])
1862 e->mhz = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]);
1863
1864 if (sinfo[NL80211_SURVEY_INFO_NOISE])
1865 e->noise = nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
1866
1867 if (sinfo[NL80211_SURVEY_INFO_TIME])
1868 e->active_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME]);
1869
1870 if (sinfo[NL80211_SURVEY_INFO_TIME_BUSY])
1871 e->busy_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_BUSY]);
1872
1873 if (sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY])
1874 e->busy_time_ext = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]);
1875
1876 if (sinfo[NL80211_SURVEY_INFO_TIME_RX])
1877 e->rxtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_RX]);
1878
1879 if (sinfo[NL80211_SURVEY_INFO_TIME_TX])
1880 e->txtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_TX]);
1881
1882 arr->count++;
1883 return NL_SKIP;
1884 }
1885
1886
1887 static void plink_state_to_str(char *dst, unsigned state)
1888 {
1889 switch (state) {
1890 case NL80211_PLINK_LISTEN:
1891 strcpy(dst, "LISTEN");
1892 break;
1893 case NL80211_PLINK_OPN_SNT:
1894 strcpy(dst, "OPN_SNT");
1895 break;
1896 case NL80211_PLINK_OPN_RCVD:
1897 strcpy(dst, "OPN_RCVD");
1898 break;
1899 case NL80211_PLINK_CNF_RCVD:
1900 strcpy(dst, "CNF_RCVD");
1901 break;
1902 case NL80211_PLINK_ESTAB:
1903 strcpy(dst, "ESTAB");
1904 break;
1905 case NL80211_PLINK_HOLDING:
1906 strcpy(dst, "HOLDING");
1907 break;
1908 case NL80211_PLINK_BLOCKED:
1909 strcpy(dst, "BLOCKED");
1910 break;
1911 default:
1912 strcpy(dst, "UNKNOWN");
1913 break;
1914 }
1915 }
1916
1917 static void power_mode_to_str(char *dst, struct nlattr *a)
1918 {
1919 enum nl80211_mesh_power_mode pm = nla_get_u32(a);
1920
1921 switch (pm) {
1922 case NL80211_MESH_POWER_ACTIVE:
1923 strcpy(dst, "ACTIVE");
1924 break;
1925 case NL80211_MESH_POWER_LIGHT_SLEEP:
1926 strcpy(dst, "LIGHT SLEEP");
1927 break;
1928 case NL80211_MESH_POWER_DEEP_SLEEP:
1929 strcpy(dst, "DEEP SLEEP");
1930 break;
1931 default:
1932 strcpy(dst, "UNKNOWN");
1933 break;
1934 }
1935 }
1936
1937 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1938 {
1939 struct nl80211_array_buf *arr = arg;
1940 struct iwinfo_assoclist_entry *e = arr->buf;
1941 struct nlattr **attr = nl80211_parse(msg);
1942 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1943 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1944 struct nl80211_sta_flag_update *sta_flags;
1945
1946 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1947 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1948 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1949 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1950 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1951 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1952 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1953 [NL80211_STA_INFO_SIGNAL_AVG] = { .type = NLA_U8 },
1954 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1955 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1956 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 },
1957 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
1958 [NL80211_STA_INFO_CONNECTED_TIME]= { .type = NLA_U32 },
1959 [NL80211_STA_INFO_RX_DROP_MISC] = { .type = NLA_U64 },
1960 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 },
1961 [NL80211_STA_INFO_STA_FLAGS] =
1962 { .minlen = sizeof(struct nl80211_sta_flag_update) },
1963 [NL80211_STA_INFO_EXPECTED_THROUGHPUT] = { .type = NLA_U32 },
1964 /* mesh */
1965 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1966 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1967 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1968 [NL80211_STA_INFO_LOCAL_PM] = { .type = NLA_U32 },
1969 [NL80211_STA_INFO_PEER_PM] = { .type = NLA_U32 },
1970 [NL80211_STA_INFO_NONPEER_PM] = { .type = NLA_U32 },
1971 };
1972
1973 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1974 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1975 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1976 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1977 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1978 };
1979
1980 /* advance to end of array */
1981 e += arr->count;
1982 memset(e, 0, sizeof(*e));
1983
1984 if (attr[NL80211_ATTR_MAC])
1985 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1986
1987 if (attr[NL80211_ATTR_STA_INFO] &&
1988 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1989 attr[NL80211_ATTR_STA_INFO], stats_policy))
1990 {
1991 if (sinfo[NL80211_STA_INFO_SIGNAL])
1992 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1993
1994 if (sinfo[NL80211_STA_INFO_SIGNAL_AVG])
1995 e->signal_avg = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]);
1996
1997 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1998 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1999
2000 if (sinfo[NL80211_STA_INFO_CONNECTED_TIME])
2001 e->connected_time = nla_get_u32(sinfo[NL80211_STA_INFO_CONNECTED_TIME]);
2002
2003 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
2004 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
2005
2006 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
2007 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
2008
2009 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
2010 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
2011 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
2012 nl80211_parse_rateinfo(rinfo, &e->rx_rate);
2013
2014 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
2015 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
2016 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
2017 nl80211_parse_rateinfo(rinfo, &e->tx_rate);
2018
2019 if (sinfo[NL80211_STA_INFO_RX_BYTES])
2020 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
2021
2022 if (sinfo[NL80211_STA_INFO_TX_BYTES])
2023 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
2024
2025 if (sinfo[NL80211_STA_INFO_TX_RETRIES])
2026 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
2027
2028 if (sinfo[NL80211_STA_INFO_TX_FAILED])
2029 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
2030
2031 if (sinfo[NL80211_STA_INFO_T_OFFSET])
2032 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]);
2033
2034 if (sinfo[NL80211_STA_INFO_RX_DROP_MISC])
2035 e->rx_drop_misc = nla_get_u64(sinfo[NL80211_STA_INFO_RX_DROP_MISC]);
2036
2037 if (sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT])
2038 e->thr = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]);
2039
2040 /* mesh */
2041 if (sinfo[NL80211_STA_INFO_LLID])
2042 e->llid = nla_get_u16(sinfo[NL80211_STA_INFO_LLID]);
2043
2044 if (sinfo[NL80211_STA_INFO_PLID])
2045 e->plid = nla_get_u16(sinfo[NL80211_STA_INFO_PLID]);
2046
2047 if (sinfo[NL80211_STA_INFO_PLINK_STATE])
2048 plink_state_to_str(e->plink_state,
2049 nla_get_u8(sinfo[NL80211_STA_INFO_PLINK_STATE]));
2050
2051 if (sinfo[NL80211_STA_INFO_LOCAL_PM])
2052 power_mode_to_str(e->local_ps, sinfo[NL80211_STA_INFO_LOCAL_PM]);
2053 if (sinfo[NL80211_STA_INFO_PEER_PM])
2054 power_mode_to_str(e->peer_ps, sinfo[NL80211_STA_INFO_PEER_PM]);
2055 if (sinfo[NL80211_STA_INFO_NONPEER_PM])
2056 power_mode_to_str(e->nonpeer_ps, sinfo[NL80211_STA_INFO_NONPEER_PM]);
2057
2058 /* Station flags */
2059 if (sinfo[NL80211_STA_INFO_STA_FLAGS])
2060 {
2061 sta_flags = (struct nl80211_sta_flag_update *)
2062 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
2063
2064 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
2065 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
2066 e->is_authorized = 1;
2067
2068 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
2069 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
2070 e->is_authenticated = 1;
2071
2072 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
2073 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
2074 e->is_preamble_short = 1;
2075
2076 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
2077 sta_flags->set & BIT(NL80211_STA_FLAG_WME))
2078 e->is_wme = 1;
2079
2080 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
2081 sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
2082 e->is_mfp = 1;
2083
2084 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
2085 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2086 e->is_tdls = 1;
2087 }
2088 }
2089
2090 e->noise = 0; /* filled in by caller */
2091 arr->count++;
2092
2093 return NL_SKIP;
2094 }
2095
2096 static int nl80211_get_survey(const char *ifname, char *buf, int *len)
2097 {
2098 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2099 int rc;
2100
2101 rc = nl80211_request(ifname, NL80211_CMD_GET_SURVEY,
2102 NLM_F_DUMP, nl80211_get_survey_cb, &arr);
2103 if (!rc)
2104 *len = (arr.count * sizeof(struct iwinfo_survey_entry));
2105 else
2106 *len = 0;
2107
2108 return 0;
2109 }
2110
2111 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
2112 {
2113 DIR *d;
2114 int i, noise = 0;
2115 struct dirent *de;
2116 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2117 struct iwinfo_assoclist_entry *e;
2118
2119 if ((d = opendir("/sys/class/net")) != NULL)
2120 {
2121 while ((de = readdir(d)) != NULL)
2122 {
2123 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
2124 (!de->d_name[strlen(ifname)] ||
2125 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
2126 {
2127 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
2128 NLM_F_DUMP, nl80211_get_assoclist_cb, &arr);
2129 }
2130 }
2131
2132 closedir(d);
2133
2134 if (!nl80211_get_noise(ifname, &noise))
2135 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
2136 e->noise = noise;
2137
2138 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
2139 return 0;
2140 }
2141
2142 return -1;
2143 }
2144
2145 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
2146 {
2147 int *dbm_max = arg;
2148 int ch_cur, ch_cmp, bands_remain, freqs_remain;
2149
2150 struct nlattr **attr = nl80211_parse(msg);
2151 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2152 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2153 struct nlattr *band, *freq;
2154
2155 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2156 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2157 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2158 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2159 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2160 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2161 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2162 };
2163
2164 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
2165 *dbm_max = -1;
2166
2167 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2168 {
2169 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
2170 nla_len(band), NULL);
2171
2172 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2173 {
2174 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2175 nla_data(freq), nla_len(freq), freq_policy);
2176
2177 ch_cmp = nl80211_freq2channel(nla_get_u32(
2178 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
2179
2180 if ((!ch_cur || (ch_cmp == ch_cur)) &&
2181 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
2182 {
2183 *dbm_max = (int)(0.01 * nla_get_u32(
2184 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
2185
2186 break;
2187 }
2188 }
2189 }
2190
2191 return NL_SKIP;
2192 }
2193
2194 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
2195 {
2196 int err, ch_cur;
2197 int dbm_max = -1, dbm_cur, dbm_cnt;
2198 struct nl80211_msg_conveyor *req;
2199 struct iwinfo_txpwrlist_entry entry;
2200
2201 if (nl80211_get_channel(ifname, &ch_cur))
2202 ch_cur = 0;
2203
2204 /* initialize the value pointer with channel for callback */
2205 dbm_max = ch_cur;
2206
2207 err = nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2208 nl80211_get_txpwrlist_cb, &dbm_max);
2209
2210 if (!err)
2211 {
2212 for (dbm_cur = 0, dbm_cnt = 0;
2213 dbm_cur < dbm_max;
2214 dbm_cur++, dbm_cnt++)
2215 {
2216 entry.dbm = dbm_cur;
2217 entry.mw = iwinfo_dbm2mw(dbm_cur);
2218
2219 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2220 }
2221
2222 entry.dbm = dbm_max;
2223 entry.mw = iwinfo_dbm2mw(dbm_max);
2224
2225 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2226 dbm_cnt++;
2227
2228 *len = dbm_cnt * sizeof(entry);
2229 return 0;
2230 }
2231
2232 return -1;
2233 }
2234
2235 static void nl80211_get_scancrypto(char *spec, struct iwinfo_crypto_entry *c)
2236 {
2237 int wpa_version = 0;
2238 char *p, *q, *proto, *suites;
2239
2240 c->enabled = 0;
2241
2242 for (p = strtok_r(spec, "[]", &q); p; p = strtok_r(NULL, "[]", &q)) {
2243 if (!strcmp(p, "WEP")) {
2244 c->enabled = 1;
2245 c->auth_suites = IWINFO_KMGMT_NONE;
2246 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2247 c->pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2248 break;
2249 }
2250
2251 proto = strtok(p, "-");
2252 suites = strtok(NULL, "]");
2253
2254 if (!proto || !suites)
2255 continue;
2256
2257 if (!strcmp(proto, "WPA2") || !strcmp(proto, "RSN"))
2258 wpa_version = 2;
2259 else if (!strcmp(proto, "WPA"))
2260 wpa_version = 1;
2261 else
2262 continue;
2263
2264 c->enabled = 1;
2265
2266 parse_wpa_suites(suites, wpa_version, &c->wpa_version, &c->auth_suites);
2267 parse_wpa_ciphers(suites, &c->pair_ciphers);
2268 }
2269 }
2270
2271
2272 struct nl80211_scanlist {
2273 struct iwinfo_scanlist_entry *e;
2274 int len;
2275 };
2276
2277
2278 static void nl80211_get_scanlist_ie(struct nlattr **bss,
2279 struct iwinfo_scanlist_entry *e)
2280 {
2281 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2282 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2283 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
2284 int len;
2285
2286 while (ielen >= 2 && ielen >= ie[1])
2287 {
2288 switch (ie[0])
2289 {
2290 case 0: /* SSID */
2291 case 114: /* Mesh ID */
2292 if (e->ssid[0] == 0) {
2293 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
2294 memcpy(e->ssid, ie + 2, len);
2295 e->ssid[len] = 0;
2296 }
2297 break;
2298
2299 case 48: /* RSN */
2300 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
2301 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
2302 break;
2303
2304 case 221: /* Vendor */
2305 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
2306 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
2307 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
2308 break;
2309 }
2310
2311 ielen -= ie[1] + 2;
2312 ie += ie[1] + 2;
2313 }
2314 }
2315
2316 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
2317 {
2318 int8_t rssi;
2319 uint16_t caps;
2320
2321 struct nl80211_scanlist *sl = arg;
2322 struct nlattr **tb = nl80211_parse(msg);
2323 struct nlattr *bss[NL80211_BSS_MAX + 1];
2324
2325 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2326 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2327 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2328 [NL80211_BSS_BSSID] = { 0 },
2329 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2330 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2331 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
2332 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2333 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2334 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2335 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2336 [NL80211_BSS_BEACON_IES] = { 0 },
2337 };
2338
2339 if (!tb[NL80211_ATTR_BSS] ||
2340 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2341 bss_policy) ||
2342 !bss[NL80211_BSS_BSSID])
2343 {
2344 return NL_SKIP;
2345 }
2346
2347 if (bss[NL80211_BSS_CAPABILITY])
2348 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2349 else
2350 caps = 0;
2351
2352 memset(sl->e, 0, sizeof(*sl->e));
2353 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
2354
2355 if (caps & (1<<1))
2356 sl->e->mode = IWINFO_OPMODE_ADHOC;
2357 else if (caps & (1<<0))
2358 sl->e->mode = IWINFO_OPMODE_MASTER;
2359 else
2360 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
2361
2362 if (caps & (1<<4))
2363 sl->e->crypto.enabled = 1;
2364
2365 if (bss[NL80211_BSS_FREQUENCY])
2366 sl->e->channel = nl80211_freq2channel(nla_get_u32(
2367 bss[NL80211_BSS_FREQUENCY]));
2368
2369 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
2370 nl80211_get_scanlist_ie(bss, sl->e);
2371
2372 if (bss[NL80211_BSS_SIGNAL_MBM])
2373 {
2374 sl->e->signal =
2375 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
2376
2377 rssi = sl->e->signal - 0x100;
2378
2379 if (rssi < -110)
2380 rssi = -110;
2381 else if (rssi > -40)
2382 rssi = -40;
2383
2384 sl->e->quality = (rssi + 110);
2385 sl->e->quality_max = 70;
2386 }
2387
2388 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
2389 {
2390 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2391 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2392 }
2393
2394 sl->e++;
2395 sl->len++;
2396
2397 return NL_SKIP;
2398 }
2399
2400 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
2401 {
2402 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
2403
2404 if (nl80211_request(ifname, NL80211_CMD_TRIGGER_SCAN, 0, NULL, NULL))
2405 goto out;
2406
2407 if (nl80211_wait("nl80211", "scan",
2408 NL80211_CMD_NEW_SCAN_RESULTS, NL80211_CMD_SCAN_ABORTED))
2409 goto out;
2410
2411 if (nl80211_request(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
2412 nl80211_get_scanlist_cb, &sl))
2413 goto out;
2414
2415 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
2416 return 0;
2417
2418 out:
2419 *len = 0;
2420 return -1;
2421 }
2422
2423 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
2424 {
2425 #define hex(x) \
2426 (((x) >= 'a') ? ((x) - 'a' + 10) : \
2427 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0')))
2428
2429 int len = 0;
2430
2431 while (*in)
2432 {
2433 if (len + 1 >= outlen)
2434 break;
2435
2436 switch (*in)
2437 {
2438 case '\\':
2439 in++;
2440 switch (*in)
2441 {
2442 case 'n':
2443 out[len++] = '\n'; in++;
2444 break;
2445
2446 case 'r':
2447 out[len++] = '\r'; in++;
2448 break;
2449
2450 case 't':
2451 out[len++] = '\t'; in++;
2452 break;
2453
2454 case 'e':
2455 out[len++] = '\033'; in++;
2456 break;
2457
2458 case 'x':
2459 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
2460 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
2461 in += 3;
2462 break;
2463
2464 default:
2465 out[len++] = *in++;
2466 break;
2467 }
2468 break;
2469
2470 default:
2471 out[len++] = *in++;
2472 break;
2473 }
2474 }
2475
2476 if (outlen > len)
2477 out[len] = '\0';
2478
2479 return len;
2480 }
2481
2482 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len)
2483 {
2484 int sock, qmax, rssi, tries, count = -1, ready = 0;
2485 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096];
2486 struct sockaddr_un local = { 0 };
2487 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
2488
2489 sock = nl80211_wpactl_connect(ifname, &local);
2490
2491 if (sock < 0)
2492 return sock;
2493
2494 send(sock, "ATTACH", 6, 0);
2495 send(sock, "SCAN", 4, 0);
2496
2497 /*
2498 * wait for scan results:
2499 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan
2500 * 72 channels at most. We'll also receive two "OK" messages acknowledging
2501 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra
2502 * time to process the results, so try 72 + 2 + 1 times.
2503 */
2504 for (tries = 0; tries < 75; tries++)
2505 {
2506 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0)
2507 continue;
2508
2509 /* got an event notification */
2510 if (reply[0] == '<')
2511 {
2512 /* scan results are ready */
2513 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS"))
2514 {
2515 /* send "SCAN_RESULTS" command */
2516 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12);
2517 break;
2518 }
2519
2520 /* is another unrelated event, retry */
2521 tries--;
2522 }
2523
2524 /* scanning already in progress, keep awaiting results */
2525 else if (!strcmp(reply, "FAIL-BUSY\n"))
2526 {
2527 tries--;
2528 }
2529
2530 /* another failure, abort */
2531 else if (!strncmp(reply, "FAIL-", 5))
2532 {
2533 break;
2534 }
2535 }
2536
2537 /* receive and parse scan results if the wait above didn't time out */
2538 while (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
2539 {
2540 /* received an event notification, receive again */
2541 if (reply[0] == '<')
2542 continue;
2543
2544 nl80211_get_quality_max(ifname, &qmax);
2545
2546 for (line = strtok_r(reply, "\n", &pos);
2547 line != NULL;
2548 line = strtok_r(NULL, "\n", &pos))
2549 {
2550 /* skip header line */
2551 if (count < 0)
2552 {
2553 count++;
2554 continue;
2555 }
2556
2557 bssid = strtok(line, "\t");
2558 freq = strtok(NULL, "\t");
2559 signal = strtok(NULL, "\t");
2560 flags = strtok(NULL, "\t");
2561 ssid = strtok(NULL, "\n");
2562
2563 if (!bssid || !freq || !signal || !flags)
2564 continue;
2565
2566 /* BSSID */
2567 e->mac[0] = strtol(&bssid[0], NULL, 16);
2568 e->mac[1] = strtol(&bssid[3], NULL, 16);
2569 e->mac[2] = strtol(&bssid[6], NULL, 16);
2570 e->mac[3] = strtol(&bssid[9], NULL, 16);
2571 e->mac[4] = strtol(&bssid[12], NULL, 16);
2572 e->mac[5] = strtol(&bssid[15], NULL, 16);
2573
2574 /* SSID */
2575 if (ssid)
2576 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2577 else
2578 e->ssid[0] = 0;
2579
2580 /* Mode */
2581 if (strstr(flags, "[MESH]"))
2582 e->mode = IWINFO_OPMODE_MESHPOINT;
2583 else if (strstr(flags, "[IBSS]"))
2584 e->mode = IWINFO_OPMODE_ADHOC;
2585 else
2586 e->mode = IWINFO_OPMODE_MASTER;
2587
2588 /* Channel */
2589 e->channel = nl80211_freq2channel(atoi(freq));
2590
2591 /* Signal */
2592 rssi = atoi(signal);
2593 e->signal = rssi;
2594
2595 /* Quality */
2596 if (rssi < 0)
2597 {
2598 /* The cfg80211 wext compat layer assumes a signal range
2599 * of -110 dBm to -40 dBm, the quality value is derived
2600 * by adding 110 to the signal level */
2601 if (rssi < -110)
2602 rssi = -110;
2603 else if (rssi > -40)
2604 rssi = -40;
2605
2606 e->quality = (rssi + 110);
2607 }
2608 else
2609 {
2610 e->quality = rssi;
2611 }
2612
2613 /* Max. Quality */
2614 e->quality_max = qmax;
2615
2616 /* Crypto */
2617 nl80211_get_scancrypto(flags, &e->crypto);
2618
2619 count++;
2620 e++;
2621 }
2622
2623 *len = count * sizeof(struct iwinfo_scanlist_entry);
2624 break;
2625 }
2626
2627 close(sock);
2628 unlink(local.sun_path);
2629
2630 return (count >= 0) ? 0 : -1;
2631 }
2632
2633 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
2634 {
2635 char *res;
2636 int rv, mode;
2637
2638 *len = 0;
2639
2640 /* Got a radioX pseudo interface, find some interface on it or create one */
2641 if (!strncmp(ifname, "radio", 5))
2642 {
2643 /* Reuse existing interface */
2644 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2645 {
2646 return nl80211_get_scanlist(res, buf, len);
2647 }
2648
2649 /* Need to spawn a temporary iface for scanning */
2650 else if ((res = nl80211_ifadd(ifname)) != NULL)
2651 {
2652 rv = nl80211_get_scanlist(res, buf, len);
2653 nl80211_ifdel(res);
2654 return rv;
2655 }
2656 }
2657
2658 /* WPA supplicant */
2659 if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
2660 {
2661 return 0;
2662 }
2663
2664 /* station / ad-hoc / monitor scan */
2665 else if (!nl80211_get_mode(ifname, &mode) &&
2666 (mode == IWINFO_OPMODE_ADHOC ||
2667 mode == IWINFO_OPMODE_MASTER ||
2668 mode == IWINFO_OPMODE_CLIENT ||
2669 mode == IWINFO_OPMODE_MONITOR) &&
2670 iwinfo_ifup(ifname))
2671 {
2672 return nl80211_get_scanlist_nl(ifname, buf, len);
2673 }
2674
2675 /* AP scan */
2676 else
2677 {
2678 /* Got a temp interface, don't create yet another one */
2679 if (!strncmp(ifname, "tmp.", 4))
2680 {
2681 if (!iwinfo_ifup(ifname))
2682 return -1;
2683
2684 rv = nl80211_get_scanlist_nl(ifname, buf, len);
2685 iwinfo_ifdown(ifname);
2686 return rv;
2687 }
2688
2689 /* Spawn a new scan interface */
2690 else
2691 {
2692 if (!(res = nl80211_ifadd(ifname)))
2693 return -1;
2694
2695 iwinfo_ifmac(res);
2696
2697 /* if we can take the new interface up, the driver supports an
2698 * additional interface and there's no need to tear down the ap */
2699 if (iwinfo_ifup(res))
2700 {
2701 rv = nl80211_get_scanlist_nl(res, buf, len);
2702 iwinfo_ifdown(res);
2703 }
2704
2705 /* driver cannot create secondary interface, take down ap
2706 * during scan */
2707 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2708 {
2709 rv = nl80211_get_scanlist_nl(res, buf, len);
2710 iwinfo_ifdown(res);
2711 iwinfo_ifup(ifname);
2712 nl80211_hostapd_hup(ifname);
2713 }
2714
2715 nl80211_ifdel(res);
2716 return rv;
2717 }
2718 }
2719
2720 return -1;
2721 }
2722
2723 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2724 {
2725 int bands_remain, freqs_remain;
2726
2727 struct nl80211_array_buf *arr = arg;
2728 struct iwinfo_freqlist_entry *e;
2729
2730 struct nlattr **attr = nl80211_parse(msg);
2731 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2732 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2733 struct nlattr *band, *freq;
2734
2735 e = arr->buf;
2736 e += arr->count;
2737
2738 if (attr[NL80211_ATTR_WIPHY_BANDS]) {
2739 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2740 {
2741 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2742 nla_data(band), nla_len(band), NULL);
2743
2744 if (bands[NL80211_BAND_ATTR_FREQS]) {
2745 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2746 {
2747 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2748 nla_data(freq), nla_len(freq), NULL);
2749
2750 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2751 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2752 continue;
2753
2754 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2755 e->channel = nl80211_freq2channel(e->mhz);
2756
2757 e->restricted = (
2758 freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
2759 !freqs[NL80211_FREQUENCY_ATTR_RADAR]
2760 ) ? 1 : 0;
2761
2762 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_MINUS])
2763 e->flags |= IWINFO_FREQ_NO_HT40MINUS;
2764 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_PLUS])
2765 e->flags |= IWINFO_FREQ_NO_HT40PLUS;
2766 if (freqs[NL80211_FREQUENCY_ATTR_NO_80MHZ])
2767 e->flags |= IWINFO_FREQ_NO_80MHZ;
2768 if (freqs[NL80211_FREQUENCY_ATTR_NO_160MHZ])
2769 e->flags |= IWINFO_FREQ_NO_160MHZ;
2770 if (freqs[NL80211_FREQUENCY_ATTR_NO_20MHZ])
2771 e->flags |= IWINFO_FREQ_NO_20MHZ;
2772 if (freqs[NL80211_FREQUENCY_ATTR_NO_10MHZ])
2773 e->flags |= IWINFO_FREQ_NO_10MHZ;
2774
2775 e++;
2776 arr->count++;
2777 }
2778 }
2779 }
2780 }
2781
2782 return NL_SKIP;
2783 }
2784
2785 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2786 {
2787 struct nl80211_msg_conveyor *cv;
2788 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2789 uint32_t features = nl80211_get_protocol_features(ifname);
2790 int flags;
2791
2792 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
2793 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
2794 if (!cv)
2795 goto out;
2796
2797 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
2798 if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr))
2799 goto out;
2800
2801 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2802 return 0;
2803
2804 nla_put_failure:
2805 nl80211_free(cv);
2806 out:
2807 *len = 0;
2808 return -1;
2809 }
2810
2811 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2812 {
2813 char *buf = arg;
2814 struct nlattr **attr = nl80211_parse(msg);
2815
2816 if (attr[NL80211_ATTR_REG_ALPHA2])
2817 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2818 else
2819 buf[0] = 0;
2820
2821 return NL_SKIP;
2822 }
2823
2824 static int nl80211_get_country(const char *ifname, char *buf)
2825 {
2826 if (nl80211_request(ifname, NL80211_CMD_GET_REG, 0,
2827 nl80211_get_country_cb, buf))
2828 return -1;
2829
2830 return 0;
2831 }
2832
2833 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2834 {
2835 int count;
2836 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2837 const struct iwinfo_iso3166_label *l;
2838
2839 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2840 {
2841 e->iso3166 = l->iso3166;
2842 e->ccode[0] = (l->iso3166 / 256);
2843 e->ccode[1] = (l->iso3166 % 256);
2844 e->ccode[2] = 0;
2845 }
2846
2847 *len = (count * sizeof(struct iwinfo_country_entry));
2848 return 0;
2849 }
2850
2851
2852 struct nl80211_modes
2853 {
2854 bool ok;
2855 uint32_t hw;
2856 uint32_t ht;
2857 };
2858
2859 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
2860 {
2861 struct nl80211_modes *m = arg;
2862 int bands_remain, freqs_remain;
2863 uint16_t caps = 0;
2864 uint32_t vht_caps = 0;
2865 struct nlattr **attr = nl80211_parse(msg);
2866 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2867 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2868 struct nlattr *band, *freq;
2869
2870 if (attr[NL80211_ATTR_WIPHY_BANDS])
2871 {
2872 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2873 {
2874 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2875 nla_data(band), nla_len(band), NULL);
2876
2877 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2878 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2879
2880 /* Treat any nonzero capability as 11n */
2881 if (caps > 0)
2882 {
2883 m->hw |= IWINFO_80211_N;
2884 m->ht |= IWINFO_HTMODE_HT20;
2885
2886 if (caps & (1 << 1))
2887 m->ht |= IWINFO_HTMODE_HT40;
2888 }
2889
2890 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2891 freqs_remain)
2892 {
2893 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2894 nla_data(freq), nla_len(freq), NULL);
2895
2896 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2897 continue;
2898
2899 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2900 {
2901 m->hw |= IWINFO_80211_B;
2902 m->hw |= IWINFO_80211_G;
2903 }
2904 else if (bands[NL80211_BAND_ATTR_VHT_CAPA])
2905 {
2906 vht_caps = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
2907
2908 /* Treat any nonzero capability as 11ac */
2909 if (vht_caps > 0)
2910 {
2911 m->hw |= IWINFO_80211_AC;
2912 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
2913
2914 switch ((vht_caps >> 2) & 3)
2915 {
2916 case 2:
2917 m->ht |= IWINFO_HTMODE_VHT80_80;
2918 /* fall through */
2919
2920 case 1:
2921 m->ht |= IWINFO_HTMODE_VHT160;
2922 }
2923 }
2924 }
2925 else if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) >= 56160)
2926 {
2927 m->hw |= IWINFO_80211_AD;
2928 }
2929 else if (!(m->hw & IWINFO_80211_AC))
2930 {
2931 m->hw |= IWINFO_80211_A;
2932 }
2933 }
2934 }
2935
2936 m->ok = 1;
2937 }
2938
2939 return NL_SKIP;
2940 }
2941
2942 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
2943 {
2944 struct nl80211_modes m = { 0 };
2945
2946 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2947 nl80211_get_modelist_cb, &m))
2948 goto out;
2949
2950 if (!m.ok)
2951 goto out;
2952
2953 *buf = m.hw;
2954 return 0;
2955
2956 out:
2957 *buf = 0;
2958 return -1;
2959 }
2960
2961 struct chan_info {
2962 int width;
2963 int mode;
2964 };
2965
2966 static int nl80211_get_htmode_cb(struct nl_msg *msg, void *arg)
2967 {
2968 struct nlattr **tb = nl80211_parse(msg);
2969 struct nlattr *cur;
2970 struct chan_info *chn = arg;
2971
2972 if ((cur = tb[NL80211_ATTR_CHANNEL_WIDTH]))
2973 chn->width = nla_get_u32(cur);
2974
2975 if ((cur = tb[NL80211_ATTR_BSS_HT_OPMODE]))
2976 chn->mode = nla_get_u32(cur);
2977
2978 return NL_SKIP;
2979 }
2980
2981 static int nl80211_get_htmode(const char *ifname, int *buf)
2982 {
2983 struct chan_info chn = { .width = 0, .mode = 0 };
2984 char *res;
2985 int err;
2986
2987 res = nl80211_phy2ifname(ifname);
2988 *buf = 0;
2989
2990 err = nl80211_request(res ? res : ifname,
2991 NL80211_CMD_GET_INTERFACE, 0,
2992 nl80211_get_htmode_cb, &chn);
2993 if (err)
2994 return -1;
2995
2996 switch (chn.width) {
2997 case NL80211_CHAN_WIDTH_20:
2998 if (chn.mode == -1)
2999 *buf = IWINFO_HTMODE_VHT20;
3000 else
3001 *buf = IWINFO_HTMODE_HT20;
3002 break;
3003 case NL80211_CHAN_WIDTH_40:
3004 if (chn.mode == -1)
3005 *buf = IWINFO_HTMODE_VHT40;
3006 else
3007 *buf = IWINFO_HTMODE_HT40;
3008 break;
3009 case NL80211_CHAN_WIDTH_80:
3010 *buf = IWINFO_HTMODE_VHT80;
3011 break;
3012 case NL80211_CHAN_WIDTH_80P80:
3013 *buf = IWINFO_HTMODE_VHT80_80;
3014 break;
3015 case NL80211_CHAN_WIDTH_160:
3016 *buf = IWINFO_HTMODE_VHT160;
3017 break;
3018 case NL80211_CHAN_WIDTH_5:
3019 case NL80211_CHAN_WIDTH_10:
3020 case NL80211_CHAN_WIDTH_20_NOHT:
3021 *buf = IWINFO_HTMODE_NOHT;
3022 break;
3023 default:
3024 return -1;
3025 }
3026
3027 return 0;
3028 }
3029
3030 static int nl80211_get_htmodelist(const char *ifname, int *buf)
3031 {
3032 struct nl80211_modes m = { 0 };
3033
3034 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
3035 nl80211_get_modelist_cb, &m))
3036 goto out;
3037
3038 if (!m.ok)
3039 goto out;
3040
3041 *buf = m.ht;
3042 return 0;
3043
3044 out:
3045 *buf = 0;
3046 return -1;
3047 }
3048
3049
3050 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
3051 {
3052 struct nlattr **attr = nl80211_parse(msg);
3053 struct nlattr *comb;
3054 int *ret = arg;
3055 int comb_rem, limit_rem, mode_rem;
3056
3057 *ret = 0;
3058 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
3059 return NL_SKIP;
3060
3061 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
3062 {
3063 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
3064 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
3065 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
3066 };
3067 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1];
3068 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
3069 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
3070 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
3071 };
3072 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1];
3073 struct nlattr *limit;
3074
3075 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy);
3076
3077 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
3078 continue;
3079
3080 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
3081 {
3082 struct nlattr *mode;
3083
3084 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
3085
3086 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
3087 !tb_limit[NL80211_IFACE_LIMIT_MAX])
3088 continue;
3089
3090 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
3091 continue;
3092
3093 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
3094 if (nla_type(mode) == NL80211_IFTYPE_AP)
3095 *ret = 1;
3096 }
3097 }
3098 }
3099
3100 return NL_SKIP;
3101 }
3102
3103 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
3104 {
3105 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
3106 nl80211_get_ifcomb_cb, buf))
3107 return -1;
3108
3109 return 0;
3110 }
3111
3112 static int nl80211_hardware_id_from_fdt(struct iwinfo_hardware_id *id, const char *ifname)
3113 {
3114 char *phy, compat[64], path[PATH_MAX];
3115 int i;
3116
3117 /* Try to determine the phy name from the given interface */
3118 phy = nl80211_ifname2phy(ifname);
3119
3120 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/of_node/compatible",
3121 phy ? "ieee80211" : "net", phy ? phy : ifname);
3122
3123 if (nl80211_readstr(path, compat, sizeof(compat)) <= 0)
3124 return -1;
3125
3126 if (!strcmp(compat, "qcom,ipq4019-wifi")) {
3127 id->vendor_id = 0x168c;
3128 id->device_id = 0x003c;
3129 id->subsystem_vendor_id = 0x168c;
3130 id->subsystem_device_id = 0x4019;
3131 }
3132
3133 return (id->vendor_id && id->device_id) ? 0 : -1;
3134 }
3135
3136
3137 static int nl80211_get_hardware_id(const char *ifname, char *buf)
3138 {
3139 struct iwinfo_hardware_id *id = (struct iwinfo_hardware_id *)buf;
3140 char *phy, num[8], path[PATH_MAX];
3141 int i;
3142
3143 struct { const char *path; uint16_t *dest; } lookup[] = {
3144 { "vendor", &id->vendor_id },
3145 { "device", &id->device_id },
3146 { "subsystem_vendor", &id->subsystem_vendor_id },
3147 { "subsystem_device", &id->subsystem_device_id }
3148 };
3149
3150 memset(id, 0, sizeof(*id));
3151
3152 /* Try to determine the phy name from the given interface */
3153 phy = nl80211_ifname2phy(ifname);
3154
3155 for (i = 0; i < ARRAY_SIZE(lookup); i++)
3156 {
3157 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/%s",
3158 phy ? "ieee80211" : "net",
3159 phy ? phy : ifname, lookup[i].path);
3160
3161 if (nl80211_readstr(path, num, sizeof(num)) > 0)
3162 *lookup[i].dest = strtoul(num, NULL, 16);
3163 }
3164
3165 /* Failed to obtain hardware IDs, try FDT */
3166 if (id->vendor_id == 0 || id->device_id == 0)
3167 if (!nl80211_hardware_id_from_fdt(id, ifname))
3168 return 0;
3169
3170 /* Failed to obtain hardware IDs, search board config */
3171 if (id->vendor_id == 0 || id->device_id == 0)
3172 return iwinfo_hardware_id_from_mtd(id);
3173
3174 return 0;
3175 }
3176
3177 static const struct iwinfo_hardware_entry *
3178 nl80211_get_hardware_entry(const char *ifname)
3179 {
3180 struct iwinfo_hardware_id id;
3181
3182 if (nl80211_get_hardware_id(ifname, (char *)&id))
3183 return NULL;
3184
3185 return iwinfo_hardware(&id);
3186 }
3187
3188 static int nl80211_get_hardware_name(const char *ifname, char *buf)
3189 {
3190 const struct iwinfo_hardware_entry *hw;
3191
3192 if (!(hw = nl80211_get_hardware_entry(ifname)))
3193 sprintf(buf, "Generic MAC80211");
3194 else
3195 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
3196
3197 return 0;
3198 }
3199
3200 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
3201 {
3202 const struct iwinfo_hardware_entry *hw;
3203
3204 if (!(hw = nl80211_get_hardware_entry(ifname)))
3205 return -1;
3206
3207 *buf = hw->txpower_offset;
3208 return 0;
3209 }
3210
3211 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
3212 {
3213 const struct iwinfo_hardware_entry *hw;
3214
3215 if (!(hw = nl80211_get_hardware_entry(ifname)))
3216 return -1;
3217
3218 *buf = hw->frequency_offset;
3219 return 0;
3220 }
3221
3222 static int nl80211_lookup_phyname(const char *section, char *buf)
3223 {
3224 int idx;
3225
3226 if ((idx = nl80211_phy_idx_from_uci(section)) < 0)
3227 return -1;
3228
3229 sprintf(buf, "phy%d", idx);
3230 return 0;
3231 }
3232
3233 const struct iwinfo_ops nl80211_ops = {
3234 .name = "nl80211",
3235 .probe = nl80211_probe,
3236 .channel = nl80211_get_channel,
3237 .frequency = nl80211_get_frequency,
3238 .frequency_offset = nl80211_get_frequency_offset,
3239 .txpower = nl80211_get_txpower,
3240 .txpower_offset = nl80211_get_txpower_offset,
3241 .bitrate = nl80211_get_bitrate,
3242 .signal = nl80211_get_signal,
3243 .noise = nl80211_get_noise,
3244 .quality = nl80211_get_quality,
3245 .quality_max = nl80211_get_quality_max,
3246 .mbssid_support = nl80211_get_mbssid_support,
3247 .hwmodelist = nl80211_get_hwmodelist,
3248 .htmodelist = nl80211_get_htmodelist,
3249 .htmode = nl80211_get_htmode,
3250 .mode = nl80211_get_mode,
3251 .ssid = nl80211_get_ssid,
3252 .bssid = nl80211_get_bssid,
3253 .country = nl80211_get_country,
3254 .hardware_id = nl80211_get_hardware_id,
3255 .hardware_name = nl80211_get_hardware_name,
3256 .encryption = nl80211_get_encryption,
3257 .phyname = nl80211_get_phyname,
3258 .assoclist = nl80211_get_assoclist,
3259 .txpwrlist = nl80211_get_txpwrlist,
3260 .scanlist = nl80211_get_scanlist,
3261 .freqlist = nl80211_get_freqlist,
3262 .countrylist = nl80211_get_countrylist,
3263 .survey = nl80211_get_survey,
3264 .lookup_phy = nl80211_lookup_phyname,
3265 .close = nl80211_close
3266 };
Library for accessing wireless device drivers