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nl80211: properly detect WEP encryption in wpa_supp scan results
[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
30 #include "iwinfo_nl80211.h"
31
32 #define min(x, y) ((x) < (y)) ? (x) : (y)
33
34 #define BIT(x) (1ULL<<(x))
35
36 static struct nl80211_state *nls = NULL;
37
38 static void nl80211_close(void)
39 {
40 if (nls)
41 {
42 if (nls->nlctrl)
43 genl_family_put(nls->nlctrl);
44
45 if (nls->nl80211)
46 genl_family_put(nls->nl80211);
47
48 if (nls->nl_sock)
49 nl_socket_free(nls->nl_sock);
50
51 if (nls->nl_cache)
52 nl_cache_free(nls->nl_cache);
53
54 free(nls);
55 nls = NULL;
56 }
57 }
58
59 static int nl80211_init(void)
60 {
61 int err, fd;
62
63 if (!nls)
64 {
65 nls = malloc(sizeof(struct nl80211_state));
66 if (!nls) {
67 err = -ENOMEM;
68 goto err;
69 }
70
71 memset(nls, 0, sizeof(*nls));
72
73 nls->nl_sock = nl_socket_alloc();
74 if (!nls->nl_sock) {
75 err = -ENOMEM;
76 goto err;
77 }
78
79 if (genl_connect(nls->nl_sock)) {
80 err = -ENOLINK;
81 goto err;
82 }
83
84 fd = nl_socket_get_fd(nls->nl_sock);
85 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
86 err = -EINVAL;
87 goto err;
88 }
89
90 if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
91 err = -ENOMEM;
92 goto err;
93 }
94
95 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
96 if (!nls->nl80211) {
97 err = -ENOENT;
98 goto err;
99 }
100
101 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
102 if (!nls->nlctrl) {
103 err = -ENOENT;
104 goto err;
105 }
106 }
107
108 return 0;
109
110
111 err:
112 nl80211_close();
113 return err;
114 }
115
116 static int nl80211_readint(const char *path)
117 {
118 int fd;
119 int rv = -1;
120 char buffer[16];
121
122 if ((fd = open(path, O_RDONLY)) > -1)
123 {
124 if (read(fd, buffer, sizeof(buffer)) > 0)
125 rv = atoi(buffer);
126
127 close(fd);
128 }
129
130 return rv;
131 }
132
133 static int nl80211_readstr(const char *path, char *buffer, int length)
134 {
135 int fd;
136 int rv = -1;
137
138 if ((fd = open(path, O_RDONLY)) > -1)
139 {
140 if ((rv = read(fd, buffer, length - 1)) > 0)
141 {
142 if (buffer[rv - 1] == '\n')
143 rv--;
144
145 buffer[rv] = 0;
146 }
147
148 close(fd);
149 }
150
151 return rv;
152 }
153
154
155 static int nl80211_msg_error(struct sockaddr_nl *nla,
156 struct nlmsgerr *err, void *arg)
157 {
158 int *ret = arg;
159 *ret = err->error;
160 return NL_STOP;
161 }
162
163 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
164 {
165 int *ret = arg;
166 *ret = 0;
167 return NL_SKIP;
168 }
169
170 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
171 {
172 int *ret = arg;
173 *ret = 0;
174 return NL_STOP;
175 }
176
177 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
178 {
179 return NL_SKIP;
180 }
181
182 static void nl80211_free(struct nl80211_msg_conveyor *cv)
183 {
184 if (cv)
185 {
186 if (cv->cb)
187 nl_cb_put(cv->cb);
188
189 if (cv->msg)
190 nlmsg_free(cv->msg);
191
192 cv->cb = NULL;
193 cv->msg = NULL;
194 }
195 }
196
197 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
198 int cmd, int flags)
199 {
200 static struct nl80211_msg_conveyor cv;
201
202 struct nl_msg *req = NULL;
203 struct nl_cb *cb = NULL;
204
205 req = nlmsg_alloc();
206 if (!req)
207 goto err;
208
209 cb = nl_cb_alloc(NL_CB_DEFAULT);
210 if (!cb)
211 goto err;
212
213 genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
214
215 cv.msg = req;
216 cv.cb = cb;
217
218 return &cv;
219
220 err:
221 if (req)
222 nlmsg_free(req);
223
224 return NULL;
225 }
226
227 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
228 {
229 if (nl80211_init() < 0)
230 return NULL;
231
232 return nl80211_new(nls->nlctrl, cmd, flags);
233 }
234
235 static int nl80211_phy_idx_from_uci_path(struct uci_section *s)
236 {
237 const char *opt;
238 char buf[128];
239 int idx = -1;
240 glob_t gl;
241
242 opt = uci_lookup_option_string(uci_ctx, s, "path");
243 if (!opt)
244 return -1;
245
246 snprintf(buf, sizeof(buf), "/sys/devices/%s/ieee80211/*/index", opt); /**/
247 if (glob(buf, 0, NULL, &gl))
248 snprintf(buf, sizeof(buf), "/sys/devices/platform/%s/ieee80211/*/index", opt); /**/
249
250 if (glob(buf, 0, NULL, &gl))
251 return -1;
252
253 if (gl.gl_pathc > 0)
254 idx = nl80211_readint(gl.gl_pathv[0]);
255
256 globfree(&gl);
257
258 return idx;
259 }
260
261 static int nl80211_phy_idx_from_uci_macaddr(struct uci_section *s)
262 {
263 const char *opt;
264 char buf[128];
265 int i, idx = -1;
266 glob_t gl;
267
268 opt = uci_lookup_option_string(uci_ctx, s, "macaddr");
269 if (!opt)
270 return -1;
271
272 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/*"); /**/
273 if (glob(buf, 0, NULL, &gl))
274 return -1;
275
276 for (i = 0; i < gl.gl_pathc; i++)
277 {
278 snprintf(buf, sizeof(buf), "%s/macaddress", gl.gl_pathv[i]);
279 if (nl80211_readstr(buf, buf, sizeof(buf)) <= 0)
280 continue;
281
282 if (fnmatch(opt, buf, FNM_CASEFOLD))
283 continue;
284
285 snprintf(buf, sizeof(buf), "%s/index", gl.gl_pathv[i]);
286 if ((idx = nl80211_readint(buf)) > -1)
287 break;
288 }
289
290 globfree(&gl);
291
292 return idx;
293 }
294
295 static int nl80211_phy_idx_from_uci_phy(struct uci_section *s)
296 {
297 const char *opt;
298 char buf[128];
299
300 opt = uci_lookup_option_string(uci_ctx, s, "phy");
301 if (!opt)
302 return -1;
303
304 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", opt);
305 return nl80211_readint(buf);
306 }
307
308 static int nl80211_phy_idx_from_uci(const char *name)
309 {
310 struct uci_section *s;
311 int idx = -1;
312
313 s = iwinfo_uci_get_radio(name, "mac80211");
314 if (!s)
315 goto free;
316
317 idx = nl80211_phy_idx_from_uci_path(s);
318
319 if (idx < 0)
320 idx = nl80211_phy_idx_from_uci_macaddr(s);
321
322 if (idx < 0)
323 idx = nl80211_phy_idx_from_uci_phy(s);
324
325 free:
326 iwinfo_uci_free();
327 return idx;
328 }
329
330 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
331 int cmd, int flags)
332 {
333 int ifidx = -1, phyidx = -1;
334 struct nl80211_msg_conveyor *cv;
335
336 if (ifname == NULL)
337 return NULL;
338
339 if (nl80211_init() < 0)
340 return NULL;
341
342 if (!strncmp(ifname, "phy", 3))
343 phyidx = atoi(&ifname[3]);
344 else if (!strncmp(ifname, "radio", 5))
345 phyidx = nl80211_phy_idx_from_uci(ifname);
346 else if (!strncmp(ifname, "mon.", 4))
347 ifidx = if_nametoindex(&ifname[4]);
348 else
349 ifidx = if_nametoindex(ifname);
350
351 /* Valid ifidx must be greater than 0 */
352 if ((ifidx <= 0) && (phyidx < 0))
353 return NULL;
354
355 cv = nl80211_new(nls->nl80211, cmd, flags);
356 if (!cv)
357 return NULL;
358
359 if (ifidx > -1)
360 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
361
362 if (phyidx > -1)
363 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
364
365 return cv;
366
367 nla_put_failure:
368 nl80211_free(cv);
369 return NULL;
370 }
371
372 static int nl80211_send(struct nl80211_msg_conveyor *cv,
373 int (*cb_func)(struct nl_msg *, void *),
374 void *cb_arg)
375 {
376 static struct nl80211_msg_conveyor rcv;
377 int err;
378
379 if (cb_func)
380 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
381 else
382 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
383
384 err = nl_send_auto_complete(nls->nl_sock, cv->msg);
385
386 if (err < 0)
387 goto out;
388
389 err = 1;
390
391 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
392 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
393 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
394
395 while (err > 0)
396 nl_recvmsgs(nls->nl_sock, cv->cb);
397
398 out:
399 nl80211_free(cv);
400 return err;
401 }
402
403 static int nl80211_request(const char *ifname, int cmd, int flags,
404 int (*cb_func)(struct nl_msg *, void *),
405 void *cb_arg)
406 {
407 struct nl80211_msg_conveyor *cv;
408
409 cv = nl80211_msg(ifname, cmd, flags);
410
411 if (!cv)
412 return -ENOMEM;
413
414 return nl80211_send(cv, cb_func, cb_arg);
415 }
416
417 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
418 {
419 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
420 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
421
422 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
423 genlmsg_attrlen(gnlh, 0), NULL);
424
425 return attr;
426 }
427
428 static int nl80211_get_protocol_features_cb(struct nl_msg *msg, void *arg)
429 {
430 uint32_t *features = arg;
431 struct nlattr **attr = nl80211_parse(msg);
432
433 if (attr[NL80211_ATTR_PROTOCOL_FEATURES])
434 *features = nla_get_u32(attr[NL80211_ATTR_PROTOCOL_FEATURES]);
435
436 return NL_SKIP;
437 }
438
439 static int nl80211_get_protocol_features(const char *ifname)
440 {
441 struct nl80211_msg_conveyor *req;
442 uint32_t features = 0;
443
444 req = nl80211_msg(ifname, NL80211_CMD_GET_PROTOCOL_FEATURES, 0);
445 if (req) {
446 nl80211_send(req, nl80211_get_protocol_features_cb, &features);
447 nl80211_free(req);
448 }
449
450 return features;
451 }
452
453 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
454 {
455 struct nl80211_group_conveyor *cv = arg;
456
457 struct nlattr **attr = nl80211_parse(msg);
458 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
459 struct nlattr *mgrp;
460 int mgrpidx;
461
462 if (!attr[CTRL_ATTR_MCAST_GROUPS])
463 return NL_SKIP;
464
465 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
466 {
467 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
468 nla_data(mgrp), nla_len(mgrp), NULL);
469
470 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
471 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
472 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
473 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
474 {
475 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
476 break;
477 }
478 }
479
480 return NL_SKIP;
481 }
482
483 static int nl80211_subscribe(const char *family, const char *group)
484 {
485 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
486 struct nl80211_msg_conveyor *req;
487 int err;
488
489 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
490 if (req)
491 {
492 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
493 err = nl80211_send(req, nl80211_subscribe_cb, &cv);
494
495 if (err)
496 return err;
497
498 return nl_socket_add_membership(nls->nl_sock, cv.id);
499
500 nla_put_failure:
501 nl80211_free(req);
502 }
503
504 return -ENOMEM;
505 }
506
507
508 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
509 {
510 struct nl80211_event_conveyor *cv = arg;
511 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
512
513 if (cv->wait[gnlh->cmd / 32] & (1 << (gnlh->cmd % 32)))
514 cv->recv = gnlh->cmd;
515
516 return NL_SKIP;
517 }
518
519 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
520 {
521 return NL_OK;
522 }
523
524 static int __nl80211_wait(const char *family, const char *group, ...)
525 {
526 struct nl80211_event_conveyor cv = { };
527 struct nl_cb *cb;
528 int err = 0;
529 int cmd;
530 va_list ap;
531
532 if (nl80211_subscribe(family, group))
533 return -ENOENT;
534
535 cb = nl_cb_alloc(NL_CB_DEFAULT);
536
537 if (!cb)
538 return -ENOMEM;
539
540 nl_cb_err(cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
541 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
542 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
543
544 va_start(ap, group);
545
546 for (cmd = va_arg(ap, int); cmd != 0; cmd = va_arg(ap, int))
547 cv.wait[cmd / 32] |= (1 << (cmd % 32));
548
549 va_end(ap);
550
551 while (!cv.recv && !err)
552 nl_recvmsgs(nls->nl_sock, cb);
553
554 nl_cb_put(cb);
555
556 return err;
557 }
558
559 #define nl80211_wait(family, group, ...) \
560 __nl80211_wait(family, group, __VA_ARGS__, 0)
561
562
563 static int nl80211_freq2channel(int freq)
564 {
565 if (freq == 2484)
566 return 14;
567 else if (freq < 2484)
568 return (freq - 2407) / 5;
569 else if (freq >= 4910 && freq <= 4980)
570 return (freq - 4000) / 5;
571 else if(freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 6)
572 return (freq - 56160) / 2160;
573 else
574 return (freq - 5000) / 5;
575 }
576
577 static int nl80211_channel2freq(int channel, const char *band)
578 {
579 if (!band || band[0] != 'a')
580 {
581 if (channel == 14)
582 return 2484;
583 else if (channel < 14)
584 return (channel * 5) + 2407;
585 }
586 else if ( strcmp(band, "ad") == 0)
587 {
588 return 56160 + 2160 * channel;
589 }
590 else
591 {
592 if (channel >= 182 && channel <= 196)
593 return (channel * 5) + 4000;
594 else
595 return (channel * 5) + 5000;
596 }
597
598 return 0;
599 }
600
601 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
602 {
603 char *buf = arg;
604 struct nlattr **attr = nl80211_parse(msg);
605
606 if (attr[NL80211_ATTR_WIPHY_NAME])
607 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
608 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
609 else
610 buf[0] = 0;
611
612 return NL_SKIP;
613 }
614
615 static char * nl80211_ifname2phy(const char *ifname)
616 {
617 static char phy[32] = { 0 };
618
619 memset(phy, 0, sizeof(phy));
620
621 nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
622 nl80211_ifname2phy_cb, phy);
623
624 return phy[0] ? phy : NULL;
625 }
626
627 static char * nl80211_phy2ifname(const char *ifname)
628 {
629 int ifidx = -1, cifidx = -1, phyidx = -1;
630 char buffer[64];
631 static char nif[IFNAMSIZ] = { 0 };
632
633 DIR *d;
634 struct dirent *e;
635
636 /* Only accept phy name of the form phy%d or radio%d */
637 if (!ifname)
638 return NULL;
639 else if (!strncmp(ifname, "phy", 3))
640 phyidx = atoi(&ifname[3]);
641 else if (!strncmp(ifname, "radio", 5))
642 phyidx = nl80211_phy_idx_from_uci(ifname);
643 else
644 return NULL;
645
646 memset(nif, 0, sizeof(nif));
647
648 if (phyidx > -1)
649 {
650 if ((d = opendir("/sys/class/net")) != NULL)
651 {
652 while ((e = readdir(d)) != NULL)
653 {
654 snprintf(buffer, sizeof(buffer),
655 "/sys/class/net/%s/phy80211/index", e->d_name);
656
657 if (nl80211_readint(buffer) == phyidx)
658 {
659 snprintf(buffer, sizeof(buffer),
660 "/sys/class/net/%s/ifindex", e->d_name);
661
662 if ((cifidx = nl80211_readint(buffer)) >= 0 &&
663 ((ifidx < 0) || (cifidx < ifidx)))
664 {
665 ifidx = cifidx;
666 strncpy(nif, e->d_name, sizeof(nif) - 1);
667 }
668 }
669 }
670
671 closedir(d);
672 }
673 }
674
675 return nif[0] ? nif : NULL;
676 }
677
678 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
679 {
680 int *mode = arg;
681 struct nlattr **tb = nl80211_parse(msg);
682 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
683 IWINFO_OPMODE_UNKNOWN, /* unspecified */
684 IWINFO_OPMODE_ADHOC, /* IBSS */
685 IWINFO_OPMODE_CLIENT, /* managed */
686 IWINFO_OPMODE_MASTER, /* AP */
687 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
688 IWINFO_OPMODE_WDS, /* WDS */
689 IWINFO_OPMODE_MONITOR, /* monitor */
690 IWINFO_OPMODE_MESHPOINT, /* mesh point */
691 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
692 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
693 };
694
695 if (tb[NL80211_ATTR_IFTYPE])
696 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
697
698 return NL_SKIP;
699 }
700
701
702 static int nl80211_get_mode(const char *ifname, int *buf)
703 {
704 char *res;
705
706 *buf = IWINFO_OPMODE_UNKNOWN;
707
708 res = nl80211_phy2ifname(ifname);
709
710 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
711 nl80211_get_mode_cb, buf);
712
713 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
714 }
715
716 static int __nl80211_hostapd_query(const char *ifname, ...)
717 {
718 va_list ap, ap_cur;
719 char *phy, *search, *dest, *key, *val, buf[128];
720 int len, mode, found = 0, match = 1;
721 FILE *fp;
722
723 if (nl80211_get_mode(ifname, &mode))
724 return 0;
725
726 if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN)
727 return 0;
728
729 phy = nl80211_ifname2phy(ifname);
730
731 if (!phy)
732 return 0;
733
734 snprintf(buf, sizeof(buf), "/var/run/hostapd-%s.conf", phy);
735 fp = fopen(buf, "r");
736
737 if (!fp)
738 return 0;
739
740 va_start(ap, ifname);
741
742 /* clear all destination buffers */
743 va_copy(ap_cur, ap);
744
745 while ((search = va_arg(ap_cur, char *)) != NULL)
746 {
747 dest = va_arg(ap_cur, char *);
748 len = va_arg(ap_cur, int);
749
750 memset(dest, 0, len);
751 }
752
753 va_end(ap_cur);
754
755 /* iterate applicable lines and copy found values into dest buffers */
756 while (fgets(buf, sizeof(buf), fp))
757 {
758 key = strtok(buf, " =\t\n");
759 val = strtok(NULL, "\n");
760
761 if (!key || !val || !*key || *key == '#')
762 continue;
763
764 if (!strcmp(key, "interface") || !strcmp(key, "bss"))
765 match = !strcmp(ifname, val);
766
767 if (!match)
768 continue;
769
770 va_copy(ap_cur, ap);
771
772 while ((search = va_arg(ap_cur, char *)) != NULL)
773 {
774 dest = va_arg(ap_cur, char *);
775 len = va_arg(ap_cur, int);
776
777 if (!strcmp(search, key))
778 {
779 strncpy(dest, val, len - 1);
780 found++;
781 break;
782 }
783 }
784
785 va_end(ap_cur);
786 }
787
788 fclose(fp);
789
790 va_end(ap);
791
792 return found;
793 }
794
795 #define nl80211_hostapd_query(ifname, ...) \
796 __nl80211_hostapd_query(ifname, ##__VA_ARGS__, NULL)
797
798
799 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
800 {
801 fd_set rfds;
802 struct timeval tv = { 0, 256000 };
803
804 FD_ZERO(&rfds);
805 FD_SET(sock, &rfds);
806
807 memset(buf, 0, blen);
808
809 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
810 return -1;
811
812 if (!FD_ISSET(sock, &rfds))
813 return -1;
814
815 return recv(sock, buf, blen - 1, 0);
816 }
817
818 static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local)
819 {
820 struct sockaddr_un remote = { 0 };
821 size_t remote_length, local_length;
822
823 int sock = socket(PF_UNIX, SOCK_DGRAM, 0);
824 if (sock < 0)
825 return sock;
826
827 remote.sun_family = AF_UNIX;
828 remote_length = sizeof(remote.sun_family) +
829 sprintf(remote.sun_path, "/var/run/wpa_supplicant-%s/%s",
830 ifname, ifname);
831
832 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
833 {
834 close(sock);
835 return -1;
836 }
837
838 if (connect(sock, (struct sockaddr *)&remote, remote_length))
839 {
840 remote_length = sizeof(remote.sun_family) +
841 sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname);
842
843 if (connect(sock, (struct sockaddr *)&remote, remote_length))
844 {
845 close(sock);
846 return -1;
847 }
848 }
849
850 local->sun_family = AF_UNIX;
851 local_length = sizeof(local->sun_family) +
852 sprintf(local->sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
853
854 if (bind(sock, (struct sockaddr *)local, local_length) < 0)
855 {
856 close(sock);
857 return -1;
858 }
859
860 return sock;
861 }
862
863 static int __nl80211_wpactl_query(const char *ifname, ...)
864 {
865 va_list ap, ap_cur;
866 struct sockaddr_un local = { 0 };
867 int len, mode, found = 0, sock = -1;
868 char *search, *dest, *key, *val, *line, *pos, buf[512];
869
870 if (nl80211_get_mode(ifname, &mode))
871 return 0;
872
873 if (mode != IWINFO_OPMODE_CLIENT && mode != IWINFO_OPMODE_ADHOC)
874 return 0;
875
876 sock = nl80211_wpactl_connect(ifname, &local);
877
878 if (sock < 0)
879 return 0;
880
881 va_start(ap, ifname);
882
883 /* clear all destination buffers */
884 va_copy(ap_cur, ap);
885
886 while ((search = va_arg(ap_cur, char *)) != NULL)
887 {
888 dest = va_arg(ap_cur, char *);
889 len = va_arg(ap_cur, int);
890
891 memset(dest, 0, len);
892 }
893
894 va_end(ap_cur);
895
896 send(sock, "STATUS", 6, 0);
897
898 while (true)
899 {
900 if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0)
901 break;
902
903 if (buf[0] == '<')
904 continue;
905
906 for (line = strtok_r(buf, "\n", &pos);
907 line != NULL;
908 line = strtok_r(NULL, "\n", &pos))
909 {
910 key = strtok(line, "=");
911 val = strtok(NULL, "\n");
912
913 if (!key || !val)
914 continue;
915
916 va_copy(ap_cur, ap);
917
918 while ((search = va_arg(ap_cur, char *)) != NULL)
919 {
920 dest = va_arg(ap_cur, char *);
921 len = va_arg(ap_cur, int);
922
923 if (!strcmp(search, key))
924 {
925 strncpy(dest, val, len - 1);
926 found++;
927 break;
928 }
929 }
930
931 va_end(ap_cur);
932 }
933
934 break;
935 }
936
937 va_end(ap);
938
939 close(sock);
940 unlink(local.sun_path);
941
942 return found;
943 }
944
945 #define nl80211_wpactl_query(ifname, ...) \
946 __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL)
947
948
949 static char * nl80211_ifadd(const char *ifname)
950 {
951 char path[PATH_MAX];
952 static char nif[IFNAMSIZ] = { 0 };
953 struct nl80211_msg_conveyor *req;
954 FILE *sysfs;
955
956 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
957 if (req)
958 {
959 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
960
961 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
962 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
963
964 nl80211_send(req, NULL, NULL);
965
966 snprintf(path, sizeof(path) - 1,
967 "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif);
968
969 if ((sysfs = fopen(path, "w")) != NULL)
970 {
971 fwrite("0\n", 1, 2, sysfs);
972 fclose(sysfs);
973 }
974
975 return nif;
976
977 nla_put_failure:
978 nl80211_free(req);
979 }
980
981 return NULL;
982 }
983
984 static void nl80211_ifdel(const char *ifname)
985 {
986 struct nl80211_msg_conveyor *req;
987 int err;
988
989 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
990 if (req)
991 {
992 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
993
994 nl80211_send(req, NULL, NULL);
995 return;
996
997 nla_put_failure:
998 nl80211_free(req);
999 }
1000 }
1001
1002 static void nl80211_hostapd_hup(const char *ifname)
1003 {
1004 int fd, pid = 0;
1005 char buf[32];
1006 char *phy = nl80211_ifname2phy(ifname);
1007
1008 if (phy)
1009 {
1010 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
1011 if ((fd = open(buf, O_RDONLY)) >= 0)
1012 {
1013 if (read(fd, buf, sizeof(buf)) > 0)
1014 pid = atoi(buf);
1015
1016 close(fd);
1017 }
1018
1019 if (pid > 0)
1020 kill(pid, 1);
1021 }
1022 }
1023
1024
1025 static int nl80211_probe(const char *ifname)
1026 {
1027 return !!nl80211_ifname2phy(ifname);
1028 }
1029
1030 struct nl80211_ssid_bssid {
1031 unsigned char *ssid;
1032 unsigned char bssid[7];
1033 };
1034
1035 static int nl80211_get_macaddr_cb(struct nl_msg *msg, void *arg)
1036 {
1037 struct nl80211_ssid_bssid *sb = arg;
1038 struct nlattr **tb = nl80211_parse(msg);
1039
1040 if (tb[NL80211_ATTR_MAC]) {
1041 sb->bssid[0] = 1;
1042 memcpy(sb->bssid + 1, nla_data(tb[NL80211_ATTR_MAC]),
1043 sizeof(sb->bssid) - 1);
1044 }
1045
1046 return NL_SKIP;
1047 }
1048
1049 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
1050 {
1051 int ielen;
1052 unsigned char *ie;
1053 struct nl80211_ssid_bssid *sb = arg;
1054 struct nlattr **tb = nl80211_parse(msg);
1055 struct nlattr *bss[NL80211_BSS_MAX + 1];
1056
1057 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1058 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
1059 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1060 };
1061
1062 if (!tb[NL80211_ATTR_BSS] ||
1063 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1064 bss_policy) ||
1065 !bss[NL80211_BSS_BSSID] ||
1066 !bss[NL80211_BSS_STATUS] ||
1067 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
1068 {
1069 return NL_SKIP;
1070 }
1071
1072 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
1073 {
1074 case NL80211_BSS_STATUS_ASSOCIATED:
1075 case NL80211_BSS_STATUS_AUTHENTICATED:
1076 case NL80211_BSS_STATUS_IBSS_JOINED:
1077
1078 if (sb->ssid)
1079 {
1080 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1081 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1082
1083 while (ielen >= 2 && ielen >= ie[1])
1084 {
1085 if (ie[0] == 0)
1086 {
1087 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1088 return NL_SKIP;
1089 }
1090
1091 ielen -= ie[1] + 2;
1092 ie += ie[1] + 2;
1093 }
1094 }
1095 else
1096 {
1097 sb->bssid[0] = 1;
1098 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
1099 return NL_SKIP;
1100 }
1101
1102 default:
1103 return NL_SKIP;
1104 }
1105 }
1106
1107 static int nl80211_get_ssid(const char *ifname, char *buf)
1108 {
1109 char *res;
1110 struct nl80211_ssid_bssid sb = { .ssid = (unsigned char *)buf };
1111
1112 /* try to find ssid from scan dump results */
1113 res = nl80211_phy2ifname(ifname);
1114 sb.ssid[0] = 0;
1115
1116 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1117 nl80211_get_ssid_bssid_cb, &sb);
1118
1119 /* failed, try to find from hostapd info */
1120 if (sb.ssid[0] == 0)
1121 nl80211_hostapd_query(ifname, "ssid", sb.ssid,
1122 IWINFO_ESSID_MAX_SIZE + 1);
1123
1124 /* failed, try to obtain Mesh ID */
1125 if (sb.ssid[0] == 0)
1126 iwinfo_ubus_query(res ? res : ifname, "mesh_id",
1127 sb.ssid, IWINFO_ESSID_MAX_SIZE + 1);
1128
1129 return (sb.ssid[0] == 0) ? -1 : 0;
1130 }
1131
1132 static int nl80211_get_bssid(const char *ifname, char *buf)
1133 {
1134 char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")];
1135 struct nl80211_ssid_bssid sb = { };
1136
1137 res = nl80211_phy2ifname(ifname);
1138
1139 /* try to obtain mac address via NL80211_CMD_GET_INTERFACE */
1140 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1141 nl80211_get_macaddr_cb, &sb);
1142
1143 /* failed, try to find bssid from scan dump results */
1144 if (sb.bssid[0] == 0)
1145 nl80211_request(res ? res : ifname,
1146 NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1147 nl80211_get_ssid_bssid_cb, &sb);
1148
1149 /* failed, try to find mac from hostapd info */
1150 if ((sb.bssid[0] == 0) &&
1151 nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid)))
1152 {
1153 sb.bssid[0] = 1;
1154 sb.bssid[1] = strtol(&bssid[0], NULL, 16);
1155 sb.bssid[2] = strtol(&bssid[3], NULL, 16);
1156 sb.bssid[3] = strtol(&bssid[6], NULL, 16);
1157 sb.bssid[4] = strtol(&bssid[9], NULL, 16);
1158 sb.bssid[5] = strtol(&bssid[12], NULL, 16);
1159 sb.bssid[6] = strtol(&bssid[15], NULL, 16);
1160 }
1161
1162 if (sb.bssid[0])
1163 {
1164 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
1165 sb.bssid[1], sb.bssid[2], sb.bssid[3],
1166 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
1167
1168 return 0;
1169 }
1170
1171 return -1;
1172 }
1173
1174
1175 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
1176 {
1177 int *freq = arg;
1178 struct nlattr **attr = nl80211_parse(msg);
1179 struct nlattr *binfo[NL80211_BSS_MAX + 1];
1180
1181 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1182 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1183 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1184 };
1185
1186 if (attr[NL80211_ATTR_BSS] &&
1187 !nla_parse_nested(binfo, NL80211_BSS_MAX,
1188 attr[NL80211_ATTR_BSS], bss_policy))
1189 {
1190 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
1191 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
1192 }
1193
1194 return NL_SKIP;
1195 }
1196
1197 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
1198 {
1199 int *freq = arg;
1200 struct nlattr **tb = nl80211_parse(msg);
1201
1202 if (tb[NL80211_ATTR_WIPHY_FREQ])
1203 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
1204
1205 return NL_SKIP;
1206 }
1207
1208 static int nl80211_get_frequency(const char *ifname, int *buf)
1209 {
1210 char *res, channel[4], hwmode[3];
1211
1212 /* try to find frequency from interface info */
1213 res = nl80211_phy2ifname(ifname);
1214 *buf = 0;
1215
1216 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1217 nl80211_get_frequency_info_cb, buf);
1218
1219 /* failed, try to find frequency from hostapd info */
1220 if ((*buf == 0) &&
1221 nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode),
1222 "channel", channel, sizeof(channel)) == 2)
1223 {
1224 *buf = nl80211_channel2freq(atoi(channel), hwmode);
1225 }
1226
1227 /* failed, try to find frequency from scan results */
1228 if (*buf == 0)
1229 {
1230 res = nl80211_phy2ifname(ifname);
1231
1232 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1233 nl80211_get_frequency_scan_cb, buf);
1234 }
1235
1236 return (*buf == 0) ? -1 : 0;
1237 }
1238
1239 static int nl80211_get_channel(const char *ifname, int *buf)
1240 {
1241 if (!nl80211_get_frequency(ifname, buf))
1242 {
1243 *buf = nl80211_freq2channel(*buf);
1244 return 0;
1245 }
1246
1247 return -1;
1248 }
1249
1250 static int nl80211_get_txpower_cb(struct nl_msg *msg, void *arg)
1251 {
1252 int *buf = arg;
1253 struct nlattr **tb = nl80211_parse(msg);
1254
1255 if (tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL])
1256 *buf = iwinfo_mbm2dbm(nla_get_u32(tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL]));
1257
1258 return NL_SKIP;
1259 }
1260
1261 static int nl80211_get_txpower(const char *ifname, int *buf)
1262 {
1263 char *res;
1264
1265 res = nl80211_phy2ifname(ifname);
1266 *buf = 0;
1267
1268 if (nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1269 nl80211_get_txpower_cb, buf))
1270 return -1;
1271
1272 return 0;
1273 }
1274
1275
1276 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1277 {
1278 int8_t dbm;
1279 int16_t mbit;
1280 struct nl80211_rssi_rate *rr = arg;
1281 struct nlattr **attr = nl80211_parse(msg);
1282 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1283 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1284
1285 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1286 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1287 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1288 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1289 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1290 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1291 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1292 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1293 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1294 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1295 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1296 };
1297
1298 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1299 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1300 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1301 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1302 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1303 };
1304
1305 if (attr[NL80211_ATTR_STA_INFO])
1306 {
1307 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1308 attr[NL80211_ATTR_STA_INFO], stats_policy))
1309 {
1310 if (sinfo[NL80211_STA_INFO_SIGNAL])
1311 {
1312 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1313 rr->rssi = (rr->rssi * rr->rssi_samples + dbm) / (rr->rssi_samples + 1);
1314 rr->rssi_samples++;
1315 }
1316
1317 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1318 {
1319 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1320 sinfo[NL80211_STA_INFO_TX_BITRATE],
1321 rate_policy))
1322 {
1323 if (rinfo[NL80211_RATE_INFO_BITRATE])
1324 {
1325 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1326 rr->rate = (rr->rate * rr->rate_samples + mbit) / (rr->rate_samples + 1);
1327 rr->rate_samples++;
1328 }
1329 }
1330 }
1331 }
1332 }
1333
1334 return NL_SKIP;
1335 }
1336
1337 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1338 {
1339 DIR *d;
1340 struct dirent *de;
1341
1342 memset(r, 0, sizeof(*r));
1343
1344 if ((d = opendir("/sys/class/net")) != NULL)
1345 {
1346 while ((de = readdir(d)) != NULL)
1347 {
1348 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1349 (!de->d_name[strlen(ifname)] ||
1350 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1351 {
1352 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
1353 NLM_F_DUMP, nl80211_fill_signal_cb, r);
1354 }
1355 }
1356
1357 closedir(d);
1358 }
1359 }
1360
1361 static int nl80211_get_bitrate(const char *ifname, int *buf)
1362 {
1363 struct nl80211_rssi_rate rr;
1364
1365 nl80211_fill_signal(ifname, &rr);
1366
1367 if (rr.rate_samples)
1368 {
1369 *buf = (rr.rate * 100);
1370 return 0;
1371 }
1372
1373 return -1;
1374 }
1375
1376 static int nl80211_get_signal(const char *ifname, int *buf)
1377 {
1378 struct nl80211_rssi_rate rr;
1379
1380 nl80211_fill_signal(ifname, &rr);
1381
1382 if (rr.rssi_samples)
1383 {
1384 *buf = rr.rssi;
1385 return 0;
1386 }
1387
1388 return -1;
1389 }
1390
1391 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1392 {
1393 int8_t *noise = arg;
1394 struct nlattr **tb = nl80211_parse(msg);
1395 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1396
1397 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1398 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1399 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1400 };
1401
1402 if (!tb[NL80211_ATTR_SURVEY_INFO])
1403 return NL_SKIP;
1404
1405 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1406 tb[NL80211_ATTR_SURVEY_INFO], sp))
1407 return NL_SKIP;
1408
1409 if (!si[NL80211_SURVEY_INFO_NOISE])
1410 return NL_SKIP;
1411
1412 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1413 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1414
1415 return NL_SKIP;
1416 }
1417
1418
1419 static int nl80211_get_noise(const char *ifname, int *buf)
1420 {
1421 int8_t noise = 0;
1422
1423 if (nl80211_request(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP,
1424 nl80211_get_noise_cb, &noise))
1425 goto out;
1426
1427 *buf = noise;
1428 return 0;
1429
1430 out:
1431 *buf = 0;
1432 return -1;
1433 }
1434
1435 static int nl80211_get_quality(const char *ifname, int *buf)
1436 {
1437 int signal;
1438
1439 if (!nl80211_get_signal(ifname, &signal))
1440 {
1441 /* A positive signal level is usually just a quality
1442 * value, pass through as-is */
1443 if (signal >= 0)
1444 {
1445 *buf = signal;
1446 }
1447
1448 /* The cfg80211 wext compat layer assumes a signal range
1449 * of -110 dBm to -40 dBm, the quality value is derived
1450 * by adding 110 to the signal level */
1451 else
1452 {
1453 if (signal < -110)
1454 signal = -110;
1455 else if (signal > -40)
1456 signal = -40;
1457
1458 *buf = (signal + 110);
1459 }
1460
1461 return 0;
1462 }
1463
1464 return -1;
1465 }
1466
1467 static int nl80211_get_quality_max(const char *ifname, int *buf)
1468 {
1469 /* The cfg80211 wext compat layer assumes a maximum
1470 * quality of 70 */
1471 *buf = 70;
1472
1473 return 0;
1474 }
1475
1476 static int nl80211_check_wepkey(const char *key)
1477 {
1478 if (key && *key)
1479 {
1480 switch (strlen(key))
1481 {
1482 case 5:
1483 case 10:
1484 return IWINFO_CIPHER_WEP40;
1485
1486 case 13:
1487 case 26:
1488 return IWINFO_CIPHER_WEP104;
1489 }
1490 }
1491
1492 return 0;
1493 }
1494
1495 static struct {
1496 const char *match;
1497 int version;
1498 int suite;
1499 } wpa_key_mgmt_strings[] = {
1500 { "IEEE 802.1X/EAP", 0, IWINFO_KMGMT_8021x },
1501 { "EAP-SUITE-B-192", 4, IWINFO_KMGMT_8021x },
1502 { "EAP-SUITE-B", 4, IWINFO_KMGMT_8021x },
1503 { "EAP-SHA256", 0, IWINFO_KMGMT_8021x },
1504 { "PSK-SHA256", 0, IWINFO_KMGMT_PSK },
1505 { "NONE", 0, IWINFO_KMGMT_NONE },
1506 { "None", 0, IWINFO_KMGMT_NONE },
1507 { "PSK", 0, IWINFO_KMGMT_PSK },
1508 { "EAP", 0, IWINFO_KMGMT_8021x },
1509 { "SAE", 4, IWINFO_KMGMT_SAE },
1510 { "OWE", 4, IWINFO_KMGMT_OWE }
1511 };
1512
1513 static void parse_wpa_suites(const char *str, int defversion,
1514 uint8_t *versions, uint8_t *suites)
1515 {
1516 size_t l;
1517 int i, version;
1518 const char *p, *q, *m, *sep = " \t\n,-+/";
1519
1520 for (p = str; *p; )
1521 {
1522 q = p;
1523
1524 for (i = 0; i < ARRAY_SIZE(wpa_key_mgmt_strings); i++)
1525 {
1526 m = wpa_key_mgmt_strings[i].match;
1527 l = strlen(m);
1528
1529 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l])))
1530 {
1531 if (wpa_key_mgmt_strings[i].version != 0)
1532 version = wpa_key_mgmt_strings[i].version;
1533 else
1534 version = defversion;
1535
1536 *versions |= version;
1537 *suites |= wpa_key_mgmt_strings[i].suite;
1538
1539 q += l;
1540 break;
1541 }
1542 }
1543
1544 if (q == p)
1545 q += strcspn(q, sep);
1546
1547 p = q + strspn(q, sep);
1548 }
1549 }
1550
1551 static struct {
1552 const char *match;
1553 int cipher;
1554 } wpa_cipher_strings[] = {
1555 { "WEP-104", IWINFO_CIPHER_WEP104 },
1556 { "WEP-40", IWINFO_CIPHER_WEP40 },
1557 { "NONE", IWINFO_CIPHER_NONE },
1558 { "TKIP", IWINFO_CIPHER_TKIP },
1559 { "CCMP", IWINFO_CIPHER_CCMP }
1560 };
1561
1562 static void parse_wpa_ciphers(const char *str, uint8_t *ciphers)
1563 {
1564 int i;
1565 size_t l;
1566 const char *m, *p, *q, *sep = " \t\n,-+/";
1567
1568 for (p = str; *p; )
1569 {
1570 q = p;
1571
1572 for (i = 0; i < ARRAY_SIZE(wpa_cipher_strings); i++)
1573 {
1574 m = wpa_cipher_strings[i].match;
1575 l = strlen(m);
1576
1577 if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l])))
1578 {
1579 *ciphers |= wpa_cipher_strings[i].cipher;
1580
1581 q += l;
1582 break;
1583 }
1584 }
1585
1586 if (q == p)
1587 q += strcspn(q, sep);
1588
1589 p = q + strspn(q, sep);
1590 }
1591 }
1592
1593 static int nl80211_get_encryption(const char *ifname, char *buf)
1594 {
1595 char *p;
1596 uint8_t wpa_version = 0;
1597 char wpa[2], wpa_key_mgmt[64], wpa_pairwise[16], wpa_groupwise[16];
1598 char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27];
1599
1600 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1601
1602 /* WPA supplicant */
1603 if (nl80211_wpactl_query(ifname,
1604 "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise),
1605 "group_cipher", wpa_groupwise, sizeof(wpa_groupwise),
1606 "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt)))
1607 {
1608 /* WEP or Open */
1609 if (!strcmp(wpa_key_mgmt, "NONE"))
1610 {
1611 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1612 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers);
1613
1614 if (c->pair_ciphers != 0 && c->pair_ciphers != IWINFO_CIPHER_NONE) {
1615 c->enabled = 1;
1616 c->auth_suites = IWINFO_KMGMT_NONE;
1617 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1618 }
1619 else {
1620 c->pair_ciphers = 0;
1621 c->group_ciphers = 0;
1622 }
1623 }
1624
1625 /* WPA */
1626 else
1627 {
1628 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1629 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers);
1630
1631 p = wpa_key_mgmt;
1632
1633 if (!strncmp(p, "WPA2-", 5) || !strncmp(p, "WPA2/", 5))
1634 {
1635 p += 5;
1636 wpa_version = 2;
1637 }
1638 else if (!strncmp(p, "WPA-", 4))
1639 {
1640 p += 4;
1641 wpa_version = 1;
1642 }
1643
1644 parse_wpa_suites(p, wpa_version, &c->wpa_version, &c->auth_suites);
1645
1646 c->enabled = !!(c->wpa_version && c->auth_suites);
1647 }
1648
1649 return 0;
1650 }
1651
1652 /* Hostapd */
1653 else if (nl80211_hostapd_query(ifname,
1654 "wpa", wpa, sizeof(wpa),
1655 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1656 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise),
1657 "auth_algs", auth_algs, sizeof(auth_algs),
1658 "wep_key0", wep_key0, sizeof(wep_key0),
1659 "wep_key1", wep_key1, sizeof(wep_key1),
1660 "wep_key2", wep_key2, sizeof(wep_key2),
1661 "wep_key3", wep_key3, sizeof(wep_key3)))
1662 {
1663 c->wpa_version = 0;
1664
1665 if (wpa_key_mgmt[0])
1666 {
1667 for (p = strtok(wpa_key_mgmt, " \t"); p != NULL; p = strtok(NULL, " \t"))
1668 {
1669 if (!strncmp(p, "WPA-", 4))
1670 p += 4;
1671
1672 parse_wpa_suites(p, atoi(wpa), &c->wpa_version, &c->auth_suites);
1673 }
1674
1675 c->enabled = c->wpa_version ? 1 : 0;
1676 }
1677
1678 if (wpa_pairwise[0])
1679 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1680
1681 if (auth_algs[0])
1682 {
1683 switch (atoi(auth_algs))
1684 {
1685 case 1:
1686 c->auth_algs |= IWINFO_AUTH_OPEN;
1687 break;
1688
1689 case 2:
1690 c->auth_algs |= IWINFO_AUTH_SHARED;
1691 break;
1692
1693 case 3:
1694 c->auth_algs |= IWINFO_AUTH_OPEN;
1695 c->auth_algs |= IWINFO_AUTH_SHARED;
1696 break;
1697 }
1698
1699 c->pair_ciphers |= nl80211_check_wepkey(wep_key0);
1700 c->pair_ciphers |= nl80211_check_wepkey(wep_key1);
1701 c->pair_ciphers |= nl80211_check_wepkey(wep_key2);
1702 c->pair_ciphers |= nl80211_check_wepkey(wep_key3);
1703
1704 c->enabled = (c->auth_algs && c->pair_ciphers) ? 1 : 0;
1705 }
1706
1707 c->group_ciphers = c->pair_ciphers;
1708
1709 return 0;
1710 }
1711
1712 return -1;
1713 }
1714
1715 static int nl80211_get_phyname(const char *ifname, char *buf)
1716 {
1717 const char *name;
1718
1719 name = nl80211_ifname2phy(ifname);
1720
1721 if (name)
1722 {
1723 strcpy(buf, name);
1724 return 0;
1725 }
1726 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1727 {
1728 name = nl80211_ifname2phy(name);
1729
1730 if (name)
1731 {
1732 strcpy(buf, ifname);
1733 return 0;
1734 }
1735 }
1736
1737 return -1;
1738 }
1739
1740
1741 static void nl80211_parse_rateinfo(struct nlattr **ri,
1742 struct iwinfo_rate_entry *re)
1743 {
1744 if (ri[NL80211_RATE_INFO_BITRATE32])
1745 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100;
1746 else if (ri[NL80211_RATE_INFO_BITRATE])
1747 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100;
1748
1749 if (ri[NL80211_RATE_INFO_VHT_MCS])
1750 {
1751 re->is_vht = 1;
1752 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]);
1753
1754 if (ri[NL80211_RATE_INFO_VHT_NSS])
1755 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]);
1756 }
1757 else if (ri[NL80211_RATE_INFO_MCS])
1758 {
1759 re->is_ht = 1;
1760 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]);
1761 }
1762
1763 if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH])
1764 re->mhz = 5;
1765 else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH])
1766 re->mhz = 10;
1767 else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH])
1768 re->mhz = 40;
1769 else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH])
1770 re->mhz = 80;
1771 else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] ||
1772 ri[NL80211_RATE_INFO_160_MHZ_WIDTH])
1773 re->mhz = 160;
1774 else
1775 re->mhz = 20;
1776
1777 if (ri[NL80211_RATE_INFO_SHORT_GI])
1778 re->is_short_gi = 1;
1779
1780 re->is_40mhz = (re->mhz == 40);
1781 }
1782
1783 static int nl80211_get_survey_cb(struct nl_msg *msg, void *arg)
1784 {
1785 struct nl80211_array_buf *arr = arg;
1786 struct iwinfo_survey_entry *e = arr->buf;
1787 struct nlattr **attr = nl80211_parse(msg);
1788 struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
1789 int rc;
1790
1791 static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
1792 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1793 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1794 [NL80211_SURVEY_INFO_TIME] = { .type = NLA_U64 },
1795 [NL80211_SURVEY_INFO_TIME_BUSY] = { .type = NLA_U64 },
1796 [NL80211_SURVEY_INFO_TIME_EXT_BUSY] = { .type = NLA_U64 },
1797 [NL80211_SURVEY_INFO_TIME_RX] = { .type = NLA_U64 },
1798 [NL80211_SURVEY_INFO_TIME_TX] = { .type = NLA_U64 },
1799 };
1800
1801 rc = nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
1802 attr[NL80211_ATTR_SURVEY_INFO],
1803 survey_policy);
1804 if (rc)
1805 return NL_SKIP;
1806
1807 /* advance to end of array */
1808 e += arr->count;
1809 memset(e, 0, sizeof(*e));
1810
1811 if (sinfo[NL80211_SURVEY_INFO_FREQUENCY])
1812 e->mhz = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]);
1813
1814 if (sinfo[NL80211_SURVEY_INFO_NOISE])
1815 e->noise = nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
1816
1817 if (sinfo[NL80211_SURVEY_INFO_TIME])
1818 e->active_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME]);
1819
1820 if (sinfo[NL80211_SURVEY_INFO_TIME_BUSY])
1821 e->busy_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_BUSY]);
1822
1823 if (sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY])
1824 e->busy_time_ext = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]);
1825
1826 if (sinfo[NL80211_SURVEY_INFO_TIME_RX])
1827 e->rxtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_RX]);
1828
1829 if (sinfo[NL80211_SURVEY_INFO_TIME_TX])
1830 e->txtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_TX]);
1831
1832 arr->count++;
1833 return NL_SKIP;
1834 }
1835
1836
1837 static void plink_state_to_str(char *dst, unsigned state)
1838 {
1839 switch (state) {
1840 case NL80211_PLINK_LISTEN:
1841 strcpy(dst, "LISTEN");
1842 break;
1843 case NL80211_PLINK_OPN_SNT:
1844 strcpy(dst, "OPN_SNT");
1845 break;
1846 case NL80211_PLINK_OPN_RCVD:
1847 strcpy(dst, "OPN_RCVD");
1848 break;
1849 case NL80211_PLINK_CNF_RCVD:
1850 strcpy(dst, "CNF_RCVD");
1851 break;
1852 case NL80211_PLINK_ESTAB:
1853 strcpy(dst, "ESTAB");
1854 break;
1855 case NL80211_PLINK_HOLDING:
1856 strcpy(dst, "HOLDING");
1857 break;
1858 case NL80211_PLINK_BLOCKED:
1859 strcpy(dst, "BLOCKED");
1860 break;
1861 default:
1862 strcpy(dst, "UNKNOWN");
1863 break;
1864 }
1865 }
1866
1867 static void power_mode_to_str(char *dst, struct nlattr *a)
1868 {
1869 enum nl80211_mesh_power_mode pm = nla_get_u32(a);
1870
1871 switch (pm) {
1872 case NL80211_MESH_POWER_ACTIVE:
1873 strcpy(dst, "ACTIVE");
1874 break;
1875 case NL80211_MESH_POWER_LIGHT_SLEEP:
1876 strcpy(dst, "LIGHT SLEEP");
1877 break;
1878 case NL80211_MESH_POWER_DEEP_SLEEP:
1879 strcpy(dst, "DEEP SLEEP");
1880 break;
1881 default:
1882 strcpy(dst, "UNKNOWN");
1883 break;
1884 }
1885 }
1886
1887 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1888 {
1889 struct nl80211_array_buf *arr = arg;
1890 struct iwinfo_assoclist_entry *e = arr->buf;
1891 struct nlattr **attr = nl80211_parse(msg);
1892 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1893 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1894 struct nl80211_sta_flag_update *sta_flags;
1895
1896 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1897 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1898 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1899 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1900 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1901 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1902 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1903 [NL80211_STA_INFO_SIGNAL_AVG] = { .type = NLA_U8 },
1904 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1905 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1906 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 },
1907 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
1908 [NL80211_STA_INFO_CONNECTED_TIME]= { .type = NLA_U32 },
1909 [NL80211_STA_INFO_RX_DROP_MISC] = { .type = NLA_U64 },
1910 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 },
1911 [NL80211_STA_INFO_STA_FLAGS] =
1912 { .minlen = sizeof(struct nl80211_sta_flag_update) },
1913 [NL80211_STA_INFO_EXPECTED_THROUGHPUT] = { .type = NLA_U32 },
1914 /* mesh */
1915 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1916 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1917 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1918 [NL80211_STA_INFO_LOCAL_PM] = { .type = NLA_U32 },
1919 [NL80211_STA_INFO_PEER_PM] = { .type = NLA_U32 },
1920 [NL80211_STA_INFO_NONPEER_PM] = { .type = NLA_U32 },
1921 };
1922
1923 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1924 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1925 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1926 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1927 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1928 };
1929
1930 /* advance to end of array */
1931 e += arr->count;
1932 memset(e, 0, sizeof(*e));
1933
1934 if (attr[NL80211_ATTR_MAC])
1935 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1936
1937 if (attr[NL80211_ATTR_STA_INFO] &&
1938 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1939 attr[NL80211_ATTR_STA_INFO], stats_policy))
1940 {
1941 if (sinfo[NL80211_STA_INFO_SIGNAL])
1942 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1943
1944 if (sinfo[NL80211_STA_INFO_SIGNAL_AVG])
1945 e->signal_avg = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]);
1946
1947 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1948 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1949
1950 if (sinfo[NL80211_STA_INFO_CONNECTED_TIME])
1951 e->connected_time = nla_get_u32(sinfo[NL80211_STA_INFO_CONNECTED_TIME]);
1952
1953 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1954 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1955
1956 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1957 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1958
1959 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1960 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1961 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1962 nl80211_parse_rateinfo(rinfo, &e->rx_rate);
1963
1964 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1965 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1966 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1967 nl80211_parse_rateinfo(rinfo, &e->tx_rate);
1968
1969 if (sinfo[NL80211_STA_INFO_RX_BYTES])
1970 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
1971
1972 if (sinfo[NL80211_STA_INFO_TX_BYTES])
1973 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
1974
1975 if (sinfo[NL80211_STA_INFO_TX_RETRIES])
1976 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
1977
1978 if (sinfo[NL80211_STA_INFO_TX_FAILED])
1979 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
1980
1981 if (sinfo[NL80211_STA_INFO_T_OFFSET])
1982 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]);
1983
1984 if (sinfo[NL80211_STA_INFO_RX_DROP_MISC])
1985 e->rx_drop_misc = nla_get_u64(sinfo[NL80211_STA_INFO_RX_DROP_MISC]);
1986
1987 if (sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT])
1988 e->thr = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]);
1989
1990 /* mesh */
1991 if (sinfo[NL80211_STA_INFO_LLID])
1992 e->llid = nla_get_u16(sinfo[NL80211_STA_INFO_LLID]);
1993
1994 if (sinfo[NL80211_STA_INFO_PLID])
1995 e->plid = nla_get_u16(sinfo[NL80211_STA_INFO_PLID]);
1996
1997 if (sinfo[NL80211_STA_INFO_PLINK_STATE])
1998 plink_state_to_str(e->plink_state,
1999 nla_get_u8(sinfo[NL80211_STA_INFO_PLINK_STATE]));
2000
2001 if (sinfo[NL80211_STA_INFO_LOCAL_PM])
2002 power_mode_to_str(e->local_ps, sinfo[NL80211_STA_INFO_LOCAL_PM]);
2003 if (sinfo[NL80211_STA_INFO_PEER_PM])
2004 power_mode_to_str(e->peer_ps, sinfo[NL80211_STA_INFO_PEER_PM]);
2005 if (sinfo[NL80211_STA_INFO_NONPEER_PM])
2006 power_mode_to_str(e->nonpeer_ps, sinfo[NL80211_STA_INFO_NONPEER_PM]);
2007
2008 /* Station flags */
2009 if (sinfo[NL80211_STA_INFO_STA_FLAGS])
2010 {
2011 sta_flags = (struct nl80211_sta_flag_update *)
2012 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
2013
2014 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
2015 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
2016 e->is_authorized = 1;
2017
2018 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
2019 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
2020 e->is_authenticated = 1;
2021
2022 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
2023 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
2024 e->is_preamble_short = 1;
2025
2026 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
2027 sta_flags->set & BIT(NL80211_STA_FLAG_WME))
2028 e->is_wme = 1;
2029
2030 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
2031 sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
2032 e->is_mfp = 1;
2033
2034 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
2035 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2036 e->is_tdls = 1;
2037 }
2038 }
2039
2040 e->noise = 0; /* filled in by caller */
2041 arr->count++;
2042
2043 return NL_SKIP;
2044 }
2045
2046 static int nl80211_get_survey(const char *ifname, char *buf, int *len)
2047 {
2048 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2049 int rc;
2050
2051 rc = nl80211_request(ifname, NL80211_CMD_GET_SURVEY,
2052 NLM_F_DUMP, nl80211_get_survey_cb, &arr);
2053 if (!rc)
2054 *len = (arr.count * sizeof(struct iwinfo_survey_entry));
2055 else
2056 *len = 0;
2057
2058 return 0;
2059 }
2060
2061 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
2062 {
2063 DIR *d;
2064 int i, noise = 0;
2065 struct dirent *de;
2066 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2067 struct iwinfo_assoclist_entry *e;
2068
2069 if ((d = opendir("/sys/class/net")) != NULL)
2070 {
2071 while ((de = readdir(d)) != NULL)
2072 {
2073 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
2074 (!de->d_name[strlen(ifname)] ||
2075 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
2076 {
2077 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
2078 NLM_F_DUMP, nl80211_get_assoclist_cb, &arr);
2079 }
2080 }
2081
2082 closedir(d);
2083
2084 if (!nl80211_get_noise(ifname, &noise))
2085 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
2086 e->noise = noise;
2087
2088 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
2089 return 0;
2090 }
2091
2092 return -1;
2093 }
2094
2095 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
2096 {
2097 int *dbm_max = arg;
2098 int ch_cur, ch_cmp, bands_remain, freqs_remain;
2099
2100 struct nlattr **attr = nl80211_parse(msg);
2101 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2102 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2103 struct nlattr *band, *freq;
2104
2105 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2106 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2107 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2108 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2109 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2110 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2111 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2112 };
2113
2114 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
2115 *dbm_max = -1;
2116
2117 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2118 {
2119 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
2120 nla_len(band), NULL);
2121
2122 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2123 {
2124 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2125 nla_data(freq), nla_len(freq), freq_policy);
2126
2127 ch_cmp = nl80211_freq2channel(nla_get_u32(
2128 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
2129
2130 if ((!ch_cur || (ch_cmp == ch_cur)) &&
2131 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
2132 {
2133 *dbm_max = (int)(0.01 * nla_get_u32(
2134 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
2135
2136 break;
2137 }
2138 }
2139 }
2140
2141 return NL_SKIP;
2142 }
2143
2144 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
2145 {
2146 int err, ch_cur;
2147 int dbm_max = -1, dbm_cur, dbm_cnt;
2148 struct nl80211_msg_conveyor *req;
2149 struct iwinfo_txpwrlist_entry entry;
2150
2151 if (nl80211_get_channel(ifname, &ch_cur))
2152 ch_cur = 0;
2153
2154 /* initialize the value pointer with channel for callback */
2155 dbm_max = ch_cur;
2156
2157 err = nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2158 nl80211_get_txpwrlist_cb, &dbm_max);
2159
2160 if (!err)
2161 {
2162 for (dbm_cur = 0, dbm_cnt = 0;
2163 dbm_cur < dbm_max;
2164 dbm_cur++, dbm_cnt++)
2165 {
2166 entry.dbm = dbm_cur;
2167 entry.mw = iwinfo_dbm2mw(dbm_cur);
2168
2169 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2170 }
2171
2172 entry.dbm = dbm_max;
2173 entry.mw = iwinfo_dbm2mw(dbm_max);
2174
2175 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2176 dbm_cnt++;
2177
2178 *len = dbm_cnt * sizeof(entry);
2179 return 0;
2180 }
2181
2182 return -1;
2183 }
2184
2185 static void nl80211_get_scancrypto(char *spec, struct iwinfo_crypto_entry *c)
2186 {
2187 int wpa_version = 0;
2188 char *p, *proto, *suites;
2189
2190 c->enabled = 0;
2191
2192 for (p = strtok(spec, "[]"); p != NULL; p = strtok(NULL, "[]")) {
2193 if (!strcmp(p, "WEP")) {
2194 c->enabled = 1;
2195 c->auth_suites = IWINFO_KMGMT_NONE;
2196 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2197 c->pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2198 break;
2199 }
2200
2201 proto = strtok(p, "-");
2202 suites = strtok(NULL, "]");
2203
2204 if (!proto || !suites)
2205 continue;
2206
2207 if (!strcmp(proto, "WPA2") || !strcmp(proto, "RSN"))
2208 wpa_version = 2;
2209 else if (!strcmp(proto, "WPA"))
2210 wpa_version = 1;
2211 else
2212 continue;
2213
2214 c->enabled = 1;
2215
2216 parse_wpa_suites(suites, wpa_version, &c->wpa_version, &c->auth_suites);
2217 parse_wpa_ciphers(suites, &c->pair_ciphers);
2218 }
2219 }
2220
2221
2222 struct nl80211_scanlist {
2223 struct iwinfo_scanlist_entry *e;
2224 int len;
2225 };
2226
2227
2228 static void nl80211_get_scanlist_ie(struct nlattr **bss,
2229 struct iwinfo_scanlist_entry *e)
2230 {
2231 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2232 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2233 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
2234 int len;
2235
2236 while (ielen >= 2 && ielen >= ie[1])
2237 {
2238 switch (ie[0])
2239 {
2240 case 0: /* SSID */
2241 case 114: /* Mesh ID */
2242 if (e->ssid[0] == 0) {
2243 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
2244 memcpy(e->ssid, ie + 2, len);
2245 e->ssid[len] = 0;
2246 }
2247 break;
2248
2249 case 48: /* RSN */
2250 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
2251 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
2252 break;
2253
2254 case 221: /* Vendor */
2255 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
2256 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
2257 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
2258 break;
2259 }
2260
2261 ielen -= ie[1] + 2;
2262 ie += ie[1] + 2;
2263 }
2264 }
2265
2266 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
2267 {
2268 int8_t rssi;
2269 uint16_t caps;
2270
2271 struct nl80211_scanlist *sl = arg;
2272 struct nlattr **tb = nl80211_parse(msg);
2273 struct nlattr *bss[NL80211_BSS_MAX + 1];
2274
2275 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2276 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2277 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2278 [NL80211_BSS_BSSID] = { 0 },
2279 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2280 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2281 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
2282 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2283 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2284 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2285 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2286 [NL80211_BSS_BEACON_IES] = { 0 },
2287 };
2288
2289 if (!tb[NL80211_ATTR_BSS] ||
2290 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2291 bss_policy) ||
2292 !bss[NL80211_BSS_BSSID])
2293 {
2294 return NL_SKIP;
2295 }
2296
2297 if (bss[NL80211_BSS_CAPABILITY])
2298 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2299 else
2300 caps = 0;
2301
2302 memset(sl->e, 0, sizeof(*sl->e));
2303 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
2304
2305 if (caps & (1<<1))
2306 sl->e->mode = IWINFO_OPMODE_ADHOC;
2307 else if (caps & (1<<0))
2308 sl->e->mode = IWINFO_OPMODE_MASTER;
2309 else
2310 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
2311
2312 if (caps & (1<<4))
2313 sl->e->crypto.enabled = 1;
2314
2315 if (bss[NL80211_BSS_FREQUENCY])
2316 sl->e->channel = nl80211_freq2channel(nla_get_u32(
2317 bss[NL80211_BSS_FREQUENCY]));
2318
2319 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
2320 nl80211_get_scanlist_ie(bss, sl->e);
2321
2322 if (bss[NL80211_BSS_SIGNAL_MBM])
2323 {
2324 sl->e->signal =
2325 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
2326
2327 rssi = sl->e->signal - 0x100;
2328
2329 if (rssi < -110)
2330 rssi = -110;
2331 else if (rssi > -40)
2332 rssi = -40;
2333
2334 sl->e->quality = (rssi + 110);
2335 sl->e->quality_max = 70;
2336 }
2337
2338 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
2339 {
2340 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2341 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2342 }
2343
2344 sl->e++;
2345 sl->len++;
2346
2347 return NL_SKIP;
2348 }
2349
2350 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
2351 {
2352 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
2353
2354 if (nl80211_request(ifname, NL80211_CMD_TRIGGER_SCAN, 0, NULL, NULL))
2355 goto out;
2356
2357 if (nl80211_wait("nl80211", "scan",
2358 NL80211_CMD_NEW_SCAN_RESULTS, NL80211_CMD_SCAN_ABORTED))
2359 goto out;
2360
2361 if (nl80211_request(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
2362 nl80211_get_scanlist_cb, &sl))
2363 goto out;
2364
2365 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
2366 return 0;
2367
2368 out:
2369 *len = 0;
2370 return -1;
2371 }
2372
2373 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
2374 {
2375 #define hex(x) \
2376 (((x) >= 'a') ? ((x) - 'a' + 10) : \
2377 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0')))
2378
2379 int len = 0;
2380
2381 while (*in)
2382 {
2383 if (len + 1 >= outlen)
2384 break;
2385
2386 switch (*in)
2387 {
2388 case '\\':
2389 in++;
2390 switch (*in)
2391 {
2392 case 'n':
2393 out[len++] = '\n'; in++;
2394 break;
2395
2396 case 'r':
2397 out[len++] = '\r'; in++;
2398 break;
2399
2400 case 't':
2401 out[len++] = '\t'; in++;
2402 break;
2403
2404 case 'e':
2405 out[len++] = '\033'; in++;
2406 break;
2407
2408 case 'x':
2409 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
2410 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
2411 in += 3;
2412 break;
2413
2414 default:
2415 out[len++] = *in++;
2416 break;
2417 }
2418 break;
2419
2420 default:
2421 out[len++] = *in++;
2422 break;
2423 }
2424 }
2425
2426 if (outlen > len)
2427 out[len] = '\0';
2428
2429 return len;
2430 }
2431
2432 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len)
2433 {
2434 int sock, qmax, rssi, tries, count = -1, ready = 0;
2435 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096];
2436 struct sockaddr_un local = { 0 };
2437 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
2438
2439 sock = nl80211_wpactl_connect(ifname, &local);
2440
2441 if (sock < 0)
2442 return sock;
2443
2444 send(sock, "ATTACH", 6, 0);
2445 send(sock, "SCAN", 4, 0);
2446
2447 /*
2448 * wait for scan results:
2449 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan
2450 * 72 channels at most. We'll also receive two "OK" messages acknowledging
2451 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra
2452 * time to process the results, so try 72 + 2 + 1 times.
2453 */
2454 for (tries = 0; tries < 75; tries++)
2455 {
2456 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0)
2457 continue;
2458
2459 /* got an event notification */
2460 if (reply[0] == '<')
2461 {
2462 /* scan results are ready */
2463 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS"))
2464 {
2465 /* send "SCAN_RESULTS" command */
2466 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12);
2467 break;
2468 }
2469
2470 /* is another unrelated event, retry */
2471 tries--;
2472 }
2473
2474 /* got a failure reply */
2475 else if (!strcmp(reply, "FAIL-BUSY\n"))
2476 {
2477 break;
2478 }
2479 }
2480
2481 /* receive and parse scan results if the wait above didn't time out */
2482 while (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
2483 {
2484 /* received an event notification, receive again */
2485 if (reply[0] == '<')
2486 continue;
2487
2488 nl80211_get_quality_max(ifname, &qmax);
2489
2490 for (line = strtok_r(reply, "\n", &pos);
2491 line != NULL;
2492 line = strtok_r(NULL, "\n", &pos))
2493 {
2494 /* skip header line */
2495 if (count < 0)
2496 {
2497 count++;
2498 continue;
2499 }
2500
2501 bssid = strtok(line, "\t");
2502 freq = strtok(NULL, "\t");
2503 signal = strtok(NULL, "\t");
2504 flags = strtok(NULL, "\t");
2505 ssid = strtok(NULL, "\n");
2506
2507 if (!bssid || !freq || !signal || !flags || !ssid)
2508 continue;
2509
2510 /* BSSID */
2511 e->mac[0] = strtol(&bssid[0], NULL, 16);
2512 e->mac[1] = strtol(&bssid[3], NULL, 16);
2513 e->mac[2] = strtol(&bssid[6], NULL, 16);
2514 e->mac[3] = strtol(&bssid[9], NULL, 16);
2515 e->mac[4] = strtol(&bssid[12], NULL, 16);
2516 e->mac[5] = strtol(&bssid[15], NULL, 16);
2517
2518 /* SSID */
2519 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2520
2521 /* Mode */
2522 if (strstr(flags, "[MESH]"))
2523 e->mode = IWINFO_OPMODE_MESHPOINT;
2524 else if (strstr(flags, "[IBSS]"))
2525 e->mode = IWINFO_OPMODE_ADHOC;
2526 else
2527 e->mode = IWINFO_OPMODE_MASTER;
2528
2529 /* Channel */
2530 e->channel = nl80211_freq2channel(atoi(freq));
2531
2532 /* Signal */
2533 rssi = atoi(signal);
2534 e->signal = rssi;
2535
2536 /* Quality */
2537 if (rssi < 0)
2538 {
2539 /* The cfg80211 wext compat layer assumes a signal range
2540 * of -110 dBm to -40 dBm, the quality value is derived
2541 * by adding 110 to the signal level */
2542 if (rssi < -110)
2543 rssi = -110;
2544 else if (rssi > -40)
2545 rssi = -40;
2546
2547 e->quality = (rssi + 110);
2548 }
2549 else
2550 {
2551 e->quality = rssi;
2552 }
2553
2554 /* Max. Quality */
2555 e->quality_max = qmax;
2556
2557 /* Crypto */
2558 nl80211_get_scancrypto(flags, &e->crypto);
2559
2560 count++;
2561 e++;
2562 }
2563
2564 *len = count * sizeof(struct iwinfo_scanlist_entry);
2565 break;
2566 }
2567
2568 close(sock);
2569 unlink(local.sun_path);
2570
2571 return (count >= 0) ? 0 : -1;
2572 }
2573
2574 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
2575 {
2576 char *res;
2577 int rv, mode;
2578
2579 *len = 0;
2580
2581 /* Got a radioX pseudo interface, find some interface on it or create one */
2582 if (!strncmp(ifname, "radio", 5))
2583 {
2584 /* Reuse existing interface */
2585 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2586 {
2587 return nl80211_get_scanlist(res, buf, len);
2588 }
2589
2590 /* Need to spawn a temporary iface for scanning */
2591 else if ((res = nl80211_ifadd(ifname)) != NULL)
2592 {
2593 rv = nl80211_get_scanlist(res, buf, len);
2594 nl80211_ifdel(res);
2595 return rv;
2596 }
2597 }
2598
2599 /* WPA supplicant */
2600 if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
2601 {
2602 return 0;
2603 }
2604
2605 /* station / ad-hoc / monitor scan */
2606 else if (!nl80211_get_mode(ifname, &mode) &&
2607 (mode == IWINFO_OPMODE_ADHOC ||
2608 mode == IWINFO_OPMODE_MASTER ||
2609 mode == IWINFO_OPMODE_CLIENT ||
2610 mode == IWINFO_OPMODE_MONITOR) &&
2611 iwinfo_ifup(ifname))
2612 {
2613 return nl80211_get_scanlist_nl(ifname, buf, len);
2614 }
2615
2616 /* AP scan */
2617 else
2618 {
2619 /* Got a temp interface, don't create yet another one */
2620 if (!strncmp(ifname, "tmp.", 4))
2621 {
2622 if (!iwinfo_ifup(ifname))
2623 return -1;
2624
2625 rv = nl80211_get_scanlist_nl(ifname, buf, len);
2626 iwinfo_ifdown(ifname);
2627 return rv;
2628 }
2629
2630 /* Spawn a new scan interface */
2631 else
2632 {
2633 if (!(res = nl80211_ifadd(ifname)))
2634 return -1;
2635
2636 iwinfo_ifmac(res);
2637
2638 /* if we can take the new interface up, the driver supports an
2639 * additional interface and there's no need to tear down the ap */
2640 if (iwinfo_ifup(res))
2641 {
2642 rv = nl80211_get_scanlist_nl(res, buf, len);
2643 iwinfo_ifdown(res);
2644 }
2645
2646 /* driver cannot create secondary interface, take down ap
2647 * during scan */
2648 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2649 {
2650 rv = nl80211_get_scanlist_nl(res, buf, len);
2651 iwinfo_ifdown(res);
2652 iwinfo_ifup(ifname);
2653 nl80211_hostapd_hup(ifname);
2654 }
2655
2656 nl80211_ifdel(res);
2657 return rv;
2658 }
2659 }
2660
2661 return -1;
2662 }
2663
2664 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2665 {
2666 int bands_remain, freqs_remain;
2667
2668 struct nl80211_array_buf *arr = arg;
2669 struct iwinfo_freqlist_entry *e;
2670
2671 struct nlattr **attr = nl80211_parse(msg);
2672 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2673 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2674 struct nlattr *band, *freq;
2675
2676 e = arr->buf;
2677 e += arr->count;
2678
2679 if (attr[NL80211_ATTR_WIPHY_BANDS]) {
2680 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2681 {
2682 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2683 nla_data(band), nla_len(band), NULL);
2684
2685 if (bands[NL80211_BAND_ATTR_FREQS]) {
2686 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2687 {
2688 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2689 nla_data(freq), nla_len(freq), NULL);
2690
2691 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2692 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2693 continue;
2694
2695 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2696 e->channel = nl80211_freq2channel(e->mhz);
2697
2698 e->restricted = (
2699 freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
2700 !freqs[NL80211_FREQUENCY_ATTR_RADAR]
2701 ) ? 1 : 0;
2702
2703 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_MINUS])
2704 e->flags |= IWINFO_FREQ_NO_HT40MINUS;
2705 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_PLUS])
2706 e->flags |= IWINFO_FREQ_NO_HT40PLUS;
2707 if (freqs[NL80211_FREQUENCY_ATTR_NO_80MHZ])
2708 e->flags |= IWINFO_FREQ_NO_80MHZ;
2709 if (freqs[NL80211_FREQUENCY_ATTR_NO_160MHZ])
2710 e->flags |= IWINFO_FREQ_NO_160MHZ;
2711 if (freqs[NL80211_FREQUENCY_ATTR_NO_20MHZ])
2712 e->flags |= IWINFO_FREQ_NO_20MHZ;
2713 if (freqs[NL80211_FREQUENCY_ATTR_NO_10MHZ])
2714 e->flags |= IWINFO_FREQ_NO_10MHZ;
2715
2716 e++;
2717 arr->count++;
2718 }
2719 }
2720 }
2721 }
2722
2723 return NL_SKIP;
2724 }
2725
2726 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2727 {
2728 struct nl80211_msg_conveyor *cv;
2729 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2730 uint32_t features = nl80211_get_protocol_features(ifname);
2731 int flags;
2732
2733 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
2734 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
2735 if (!cv)
2736 goto out;
2737
2738 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
2739 if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr))
2740 goto out;
2741
2742 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2743 return 0;
2744
2745 nla_put_failure:
2746 nl80211_free(cv);
2747 out:
2748 *len = 0;
2749 return -1;
2750 }
2751
2752 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2753 {
2754 char *buf = arg;
2755 struct nlattr **attr = nl80211_parse(msg);
2756
2757 if (attr[NL80211_ATTR_REG_ALPHA2])
2758 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2759 else
2760 buf[0] = 0;
2761
2762 return NL_SKIP;
2763 }
2764
2765 static int nl80211_get_country(const char *ifname, char *buf)
2766 {
2767 if (nl80211_request(ifname, NL80211_CMD_GET_REG, 0,
2768 nl80211_get_country_cb, buf))
2769 return -1;
2770
2771 return 0;
2772 }
2773
2774 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2775 {
2776 int count;
2777 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2778 const struct iwinfo_iso3166_label *l;
2779
2780 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2781 {
2782 e->iso3166 = l->iso3166;
2783 e->ccode[0] = (l->iso3166 / 256);
2784 e->ccode[1] = (l->iso3166 % 256);
2785 e->ccode[2] = 0;
2786 }
2787
2788 *len = (count * sizeof(struct iwinfo_country_entry));
2789 return 0;
2790 }
2791
2792
2793 struct nl80211_modes
2794 {
2795 bool ok;
2796 uint32_t hw;
2797 uint32_t ht;
2798 };
2799
2800 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
2801 {
2802 struct nl80211_modes *m = arg;
2803 int bands_remain, freqs_remain;
2804 uint16_t caps = 0;
2805 uint32_t vht_caps = 0;
2806 struct nlattr **attr = nl80211_parse(msg);
2807 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2808 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2809 struct nlattr *band, *freq;
2810
2811 if (attr[NL80211_ATTR_WIPHY_BANDS])
2812 {
2813 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2814 {
2815 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2816 nla_data(band), nla_len(band), NULL);
2817
2818 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2819 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2820
2821 /* Treat any nonzero capability as 11n */
2822 if (caps > 0)
2823 {
2824 m->hw |= IWINFO_80211_N;
2825 m->ht |= IWINFO_HTMODE_HT20;
2826
2827 if (caps & (1 << 1))
2828 m->ht |= IWINFO_HTMODE_HT40;
2829 }
2830
2831 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2832 freqs_remain)
2833 {
2834 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2835 nla_data(freq), nla_len(freq), NULL);
2836
2837 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2838 continue;
2839
2840 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2841 {
2842 m->hw |= IWINFO_80211_B;
2843 m->hw |= IWINFO_80211_G;
2844 }
2845 else if (bands[NL80211_BAND_ATTR_VHT_CAPA])
2846 {
2847 vht_caps = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
2848
2849 /* Treat any nonzero capability as 11ac */
2850 if (vht_caps > 0)
2851 {
2852 m->hw |= IWINFO_80211_AC;
2853 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
2854
2855 switch ((vht_caps >> 2) & 3)
2856 {
2857 case 2:
2858 m->ht |= IWINFO_HTMODE_VHT80_80;
2859 /* fall through */
2860
2861 case 1:
2862 m->ht |= IWINFO_HTMODE_VHT160;
2863 }
2864 }
2865 }
2866 else if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) >= 56160)
2867 {
2868 m->hw |= IWINFO_80211_AD;
2869 }
2870 else if (!(m->hw & IWINFO_80211_AC))
2871 {
2872 m->hw |= IWINFO_80211_A;
2873 }
2874 }
2875 }
2876
2877 m->ok = 1;
2878 }
2879
2880 return NL_SKIP;
2881 }
2882
2883 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
2884 {
2885 struct nl80211_modes m = { 0 };
2886
2887 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2888 nl80211_get_modelist_cb, &m))
2889 goto out;
2890
2891 if (!m.ok)
2892 goto out;
2893
2894 *buf = m.hw;
2895 return 0;
2896
2897 out:
2898 *buf = 0;
2899 return -1;
2900 }
2901
2902 static int nl80211_get_htmodelist(const char *ifname, int *buf)
2903 {
2904 struct nl80211_modes m = { 0 };
2905
2906 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2907 nl80211_get_modelist_cb, &m))
2908 goto out;
2909
2910 if (!m.ok)
2911 goto out;
2912
2913 *buf = m.ht;
2914 return 0;
2915
2916 out:
2917 *buf = 0;
2918 return -1;
2919 }
2920
2921
2922 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
2923 {
2924 struct nlattr **attr = nl80211_parse(msg);
2925 struct nlattr *comb;
2926 int *ret = arg;
2927 int comb_rem, limit_rem, mode_rem;
2928
2929 *ret = 0;
2930 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
2931 return NL_SKIP;
2932
2933 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
2934 {
2935 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
2936 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
2937 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
2938 };
2939 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1];
2940 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
2941 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
2942 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
2943 };
2944 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1];
2945 struct nlattr *limit;
2946
2947 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy);
2948
2949 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
2950 continue;
2951
2952 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
2953 {
2954 struct nlattr *mode;
2955
2956 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
2957
2958 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
2959 !tb_limit[NL80211_IFACE_LIMIT_MAX])
2960 continue;
2961
2962 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
2963 continue;
2964
2965 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
2966 if (nla_type(mode) == NL80211_IFTYPE_AP)
2967 *ret = 1;
2968 }
2969 }
2970 }
2971
2972 return NL_SKIP;
2973 }
2974
2975 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
2976 {
2977 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2978 nl80211_get_ifcomb_cb, buf))
2979 return -1;
2980
2981 return 0;
2982 }
2983
2984 static int nl80211_get_hardware_id(const char *ifname, char *buf)
2985 {
2986 struct iwinfo_hardware_id *id = (struct iwinfo_hardware_id *)buf;
2987 char *phy, num[8], path[PATH_MAX];
2988 int i;
2989
2990 struct { const char *path; uint16_t *dest; } lookup[] = {
2991 { "vendor", &id->vendor_id },
2992 { "device", &id->device_id },
2993 { "subsystem_vendor", &id->subsystem_vendor_id },
2994 { "subsystem_device", &id->subsystem_device_id }
2995 };
2996
2997 memset(id, 0, sizeof(*id));
2998
2999 /* Try to determine the phy name from the given interface */
3000 phy = nl80211_ifname2phy(ifname);
3001
3002 for (i = 0; i < ARRAY_SIZE(lookup); i++)
3003 {
3004 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/%s",
3005 phy ? "ieee80211" : "net",
3006 phy ? phy : ifname, lookup[i].path);
3007
3008 if (nl80211_readstr(path, num, sizeof(num)) > 0)
3009 *lookup[i].dest = strtoul(num, NULL, 16);
3010 }
3011
3012 /* Failed to obtain hardware IDs, search board config */
3013 if (id->vendor_id == 0 || id->device_id == 0)
3014 return iwinfo_hardware_id_from_mtd(id);
3015
3016 return 0;
3017 }
3018
3019 static const struct iwinfo_hardware_entry *
3020 nl80211_get_hardware_entry(const char *ifname)
3021 {
3022 struct iwinfo_hardware_id id;
3023
3024 if (nl80211_get_hardware_id(ifname, (char *)&id))
3025 return NULL;
3026
3027 return iwinfo_hardware(&id);
3028 }
3029
3030 static int nl80211_get_hardware_name(const char *ifname, char *buf)
3031 {
3032 const struct iwinfo_hardware_entry *hw;
3033
3034 if (!(hw = nl80211_get_hardware_entry(ifname)))
3035 sprintf(buf, "Generic MAC80211");
3036 else
3037 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
3038
3039 return 0;
3040 }
3041
3042 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
3043 {
3044 const struct iwinfo_hardware_entry *hw;
3045
3046 if (!(hw = nl80211_get_hardware_entry(ifname)))
3047 return -1;
3048
3049 *buf = hw->txpower_offset;
3050 return 0;
3051 }
3052
3053 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
3054 {
3055 const struct iwinfo_hardware_entry *hw;
3056
3057 if (!(hw = nl80211_get_hardware_entry(ifname)))
3058 return -1;
3059
3060 *buf = hw->frequency_offset;
3061 return 0;
3062 }
3063
3064 static int nl80211_lookup_phyname(const char *section, char *buf)
3065 {
3066 int idx;
3067
3068 if ((idx = nl80211_phy_idx_from_uci(section)) < 0)
3069 return -1;
3070
3071 sprintf(buf, "phy%d", idx);
3072 return 0;
3073 }
3074
3075 const struct iwinfo_ops nl80211_ops = {
3076 .name = "nl80211",
3077 .probe = nl80211_probe,
3078 .channel = nl80211_get_channel,
3079 .frequency = nl80211_get_frequency,
3080 .frequency_offset = nl80211_get_frequency_offset,
3081 .txpower = nl80211_get_txpower,
3082 .txpower_offset = nl80211_get_txpower_offset,
3083 .bitrate = nl80211_get_bitrate,
3084 .signal = nl80211_get_signal,
3085 .noise = nl80211_get_noise,
3086 .quality = nl80211_get_quality,
3087 .quality_max = nl80211_get_quality_max,
3088 .mbssid_support = nl80211_get_mbssid_support,
3089 .hwmodelist = nl80211_get_hwmodelist,
3090 .htmodelist = nl80211_get_htmodelist,
3091 .mode = nl80211_get_mode,
3092 .ssid = nl80211_get_ssid,
3093 .bssid = nl80211_get_bssid,
3094 .country = nl80211_get_country,
3095 .hardware_id = nl80211_get_hardware_id,
3096 .hardware_name = nl80211_get_hardware_name,
3097 .encryption = nl80211_get_encryption,
3098 .phyname = nl80211_get_phyname,
3099 .assoclist = nl80211_get_assoclist,
3100 .txpwrlist = nl80211_get_txpwrlist,
3101 .scanlist = nl80211_get_scanlist,
3102 .freqlist = nl80211_get_freqlist,
3103 .countrylist = nl80211_get_countrylist,
3104 .survey = nl80211_get_survey,
3105 .lookup_phy = nl80211_lookup_phyname,
3106 .close = nl80211_close
3107 };
Library for accessing wireless device drivers