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nl80211: rework hostapd and wpa_supplicant wpa suite parsing
[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 */
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 c->enabled = !!(c->pair_ciphers | c->group_ciphers);
1615 c->auth_suites |= IWINFO_KMGMT_NONE;
1616 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1617 }
1618
1619 /* WPA */
1620 else
1621 {
1622 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1623 parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers);
1624
1625 p = wpa_key_mgmt;
1626
1627 if (!strncmp(p, "WPA2-", 5) || !strncmp(p, "WPA2/", 5))
1628 {
1629 p += 5;
1630 wpa_version = 2;
1631 }
1632 else if (!strncmp(p, "WPA-", 4))
1633 {
1634 p += 4;
1635 wpa_version = 1;
1636 }
1637
1638 parse_wpa_suites(p, wpa_version, &c->wpa_version, &c->auth_suites);
1639
1640 c->enabled = !!(c->wpa_version && c->auth_suites);
1641 }
1642
1643 return 0;
1644 }
1645
1646 /* Hostapd */
1647 else if (nl80211_hostapd_query(ifname,
1648 "wpa", wpa, sizeof(wpa),
1649 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1650 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise),
1651 "auth_algs", auth_algs, sizeof(auth_algs),
1652 "wep_key0", wep_key0, sizeof(wep_key0),
1653 "wep_key1", wep_key1, sizeof(wep_key1),
1654 "wep_key2", wep_key2, sizeof(wep_key2),
1655 "wep_key3", wep_key3, sizeof(wep_key3)))
1656 {
1657 c->wpa_version = 0;
1658
1659 if (wpa_key_mgmt[0])
1660 {
1661 for (p = strtok(wpa_key_mgmt, " \t"); p != NULL; p = strtok(NULL, " \t"))
1662 {
1663 if (!strncmp(p, "WPA-", 4))
1664 p += 4;
1665
1666 parse_wpa_suites(p, atoi(wpa), &c->wpa_version, &c->auth_suites);
1667 }
1668
1669 c->enabled = c->wpa_version ? 1 : 0;
1670 }
1671
1672 if (wpa_pairwise[0])
1673 parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1674
1675 if (auth_algs[0])
1676 {
1677 switch (atoi(auth_algs))
1678 {
1679 case 1:
1680 c->auth_algs |= IWINFO_AUTH_OPEN;
1681 break;
1682
1683 case 2:
1684 c->auth_algs |= IWINFO_AUTH_SHARED;
1685 break;
1686
1687 case 3:
1688 c->auth_algs |= IWINFO_AUTH_OPEN;
1689 c->auth_algs |= IWINFO_AUTH_SHARED;
1690 break;
1691 }
1692
1693 c->enabled = c->auth_algs ? 1 : 0;
1694 c->pair_ciphers |= nl80211_check_wepkey(wep_key0);
1695 c->pair_ciphers |= nl80211_check_wepkey(wep_key1);
1696 c->pair_ciphers |= nl80211_check_wepkey(wep_key2);
1697 c->pair_ciphers |= nl80211_check_wepkey(wep_key3);
1698 }
1699
1700 c->group_ciphers = c->pair_ciphers;
1701
1702 return 0;
1703 }
1704
1705 return -1;
1706 }
1707
1708 static int nl80211_get_phyname(const char *ifname, char *buf)
1709 {
1710 const char *name;
1711
1712 name = nl80211_ifname2phy(ifname);
1713
1714 if (name)
1715 {
1716 strcpy(buf, name);
1717 return 0;
1718 }
1719 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1720 {
1721 name = nl80211_ifname2phy(name);
1722
1723 if (name)
1724 {
1725 strcpy(buf, ifname);
1726 return 0;
1727 }
1728 }
1729
1730 return -1;
1731 }
1732
1733
1734 static void nl80211_parse_rateinfo(struct nlattr **ri,
1735 struct iwinfo_rate_entry *re)
1736 {
1737 if (ri[NL80211_RATE_INFO_BITRATE32])
1738 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100;
1739 else if (ri[NL80211_RATE_INFO_BITRATE])
1740 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100;
1741
1742 if (ri[NL80211_RATE_INFO_VHT_MCS])
1743 {
1744 re->is_vht = 1;
1745 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]);
1746
1747 if (ri[NL80211_RATE_INFO_VHT_NSS])
1748 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]);
1749 }
1750 else if (ri[NL80211_RATE_INFO_MCS])
1751 {
1752 re->is_ht = 1;
1753 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]);
1754 }
1755
1756 if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH])
1757 re->mhz = 5;
1758 else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH])
1759 re->mhz = 10;
1760 else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH])
1761 re->mhz = 40;
1762 else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH])
1763 re->mhz = 80;
1764 else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] ||
1765 ri[NL80211_RATE_INFO_160_MHZ_WIDTH])
1766 re->mhz = 160;
1767 else
1768 re->mhz = 20;
1769
1770 if (ri[NL80211_RATE_INFO_SHORT_GI])
1771 re->is_short_gi = 1;
1772
1773 re->is_40mhz = (re->mhz == 40);
1774 }
1775
1776 static int nl80211_get_survey_cb(struct nl_msg *msg, void *arg)
1777 {
1778 struct nl80211_array_buf *arr = arg;
1779 struct iwinfo_survey_entry *e = arr->buf;
1780 struct nlattr **attr = nl80211_parse(msg);
1781 struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
1782 int rc;
1783
1784 static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
1785 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1786 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1787 [NL80211_SURVEY_INFO_TIME] = { .type = NLA_U64 },
1788 [NL80211_SURVEY_INFO_TIME_BUSY] = { .type = NLA_U64 },
1789 [NL80211_SURVEY_INFO_TIME_EXT_BUSY] = { .type = NLA_U64 },
1790 [NL80211_SURVEY_INFO_TIME_RX] = { .type = NLA_U64 },
1791 [NL80211_SURVEY_INFO_TIME_TX] = { .type = NLA_U64 },
1792 };
1793
1794 rc = nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
1795 attr[NL80211_ATTR_SURVEY_INFO],
1796 survey_policy);
1797 if (rc)
1798 return NL_SKIP;
1799
1800 /* advance to end of array */
1801 e += arr->count;
1802 memset(e, 0, sizeof(*e));
1803
1804 if (sinfo[NL80211_SURVEY_INFO_FREQUENCY])
1805 e->mhz = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]);
1806
1807 if (sinfo[NL80211_SURVEY_INFO_NOISE])
1808 e->noise = nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
1809
1810 if (sinfo[NL80211_SURVEY_INFO_TIME])
1811 e->active_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME]);
1812
1813 if (sinfo[NL80211_SURVEY_INFO_TIME_BUSY])
1814 e->busy_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_BUSY]);
1815
1816 if (sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY])
1817 e->busy_time_ext = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]);
1818
1819 if (sinfo[NL80211_SURVEY_INFO_TIME_RX])
1820 e->rxtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_RX]);
1821
1822 if (sinfo[NL80211_SURVEY_INFO_TIME_TX])
1823 e->txtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_TX]);
1824
1825 arr->count++;
1826 return NL_SKIP;
1827 }
1828
1829
1830 static void plink_state_to_str(char *dst, unsigned state)
1831 {
1832 switch (state) {
1833 case NL80211_PLINK_LISTEN:
1834 strcpy(dst, "LISTEN");
1835 break;
1836 case NL80211_PLINK_OPN_SNT:
1837 strcpy(dst, "OPN_SNT");
1838 break;
1839 case NL80211_PLINK_OPN_RCVD:
1840 strcpy(dst, "OPN_RCVD");
1841 break;
1842 case NL80211_PLINK_CNF_RCVD:
1843 strcpy(dst, "CNF_RCVD");
1844 break;
1845 case NL80211_PLINK_ESTAB:
1846 strcpy(dst, "ESTAB");
1847 break;
1848 case NL80211_PLINK_HOLDING:
1849 strcpy(dst, "HOLDING");
1850 break;
1851 case NL80211_PLINK_BLOCKED:
1852 strcpy(dst, "BLOCKED");
1853 break;
1854 default:
1855 strcpy(dst, "UNKNOWN");
1856 break;
1857 }
1858 }
1859
1860 static void power_mode_to_str(char *dst, struct nlattr *a)
1861 {
1862 enum nl80211_mesh_power_mode pm = nla_get_u32(a);
1863
1864 switch (pm) {
1865 case NL80211_MESH_POWER_ACTIVE:
1866 strcpy(dst, "ACTIVE");
1867 break;
1868 case NL80211_MESH_POWER_LIGHT_SLEEP:
1869 strcpy(dst, "LIGHT SLEEP");
1870 break;
1871 case NL80211_MESH_POWER_DEEP_SLEEP:
1872 strcpy(dst, "DEEP SLEEP");
1873 break;
1874 default:
1875 strcpy(dst, "UNKNOWN");
1876 break;
1877 }
1878 }
1879
1880 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1881 {
1882 struct nl80211_array_buf *arr = arg;
1883 struct iwinfo_assoclist_entry *e = arr->buf;
1884 struct nlattr **attr = nl80211_parse(msg);
1885 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1886 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1887 struct nl80211_sta_flag_update *sta_flags;
1888
1889 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1890 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1891 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1892 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1893 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1894 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1895 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1896 [NL80211_STA_INFO_SIGNAL_AVG] = { .type = NLA_U8 },
1897 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1898 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1899 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 },
1900 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
1901 [NL80211_STA_INFO_CONNECTED_TIME]= { .type = NLA_U32 },
1902 [NL80211_STA_INFO_RX_DROP_MISC] = { .type = NLA_U64 },
1903 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 },
1904 [NL80211_STA_INFO_STA_FLAGS] =
1905 { .minlen = sizeof(struct nl80211_sta_flag_update) },
1906 [NL80211_STA_INFO_EXPECTED_THROUGHPUT] = { .type = NLA_U32 },
1907 /* mesh */
1908 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1909 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1910 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1911 [NL80211_STA_INFO_LOCAL_PM] = { .type = NLA_U32 },
1912 [NL80211_STA_INFO_PEER_PM] = { .type = NLA_U32 },
1913 [NL80211_STA_INFO_NONPEER_PM] = { .type = NLA_U32 },
1914 };
1915
1916 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1917 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1918 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1919 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1920 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1921 };
1922
1923 /* advance to end of array */
1924 e += arr->count;
1925 memset(e, 0, sizeof(*e));
1926
1927 if (attr[NL80211_ATTR_MAC])
1928 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1929
1930 if (attr[NL80211_ATTR_STA_INFO] &&
1931 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1932 attr[NL80211_ATTR_STA_INFO], stats_policy))
1933 {
1934 if (sinfo[NL80211_STA_INFO_SIGNAL])
1935 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1936
1937 if (sinfo[NL80211_STA_INFO_SIGNAL_AVG])
1938 e->signal_avg = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]);
1939
1940 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1941 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1942
1943 if (sinfo[NL80211_STA_INFO_CONNECTED_TIME])
1944 e->connected_time = nla_get_u32(sinfo[NL80211_STA_INFO_CONNECTED_TIME]);
1945
1946 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1947 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1948
1949 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1950 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1951
1952 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1953 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1954 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1955 nl80211_parse_rateinfo(rinfo, &e->rx_rate);
1956
1957 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1958 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1959 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1960 nl80211_parse_rateinfo(rinfo, &e->tx_rate);
1961
1962 if (sinfo[NL80211_STA_INFO_RX_BYTES])
1963 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
1964
1965 if (sinfo[NL80211_STA_INFO_TX_BYTES])
1966 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
1967
1968 if (sinfo[NL80211_STA_INFO_TX_RETRIES])
1969 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
1970
1971 if (sinfo[NL80211_STA_INFO_TX_FAILED])
1972 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
1973
1974 if (sinfo[NL80211_STA_INFO_T_OFFSET])
1975 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]);
1976
1977 if (sinfo[NL80211_STA_INFO_RX_DROP_MISC])
1978 e->rx_drop_misc = nla_get_u64(sinfo[NL80211_STA_INFO_RX_DROP_MISC]);
1979
1980 if (sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT])
1981 e->thr = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]);
1982
1983 /* mesh */
1984 if (sinfo[NL80211_STA_INFO_LLID])
1985 e->llid = nla_get_u16(sinfo[NL80211_STA_INFO_LLID]);
1986
1987 if (sinfo[NL80211_STA_INFO_PLID])
1988 e->plid = nla_get_u16(sinfo[NL80211_STA_INFO_PLID]);
1989
1990 if (sinfo[NL80211_STA_INFO_PLINK_STATE])
1991 plink_state_to_str(e->plink_state,
1992 nla_get_u8(sinfo[NL80211_STA_INFO_PLINK_STATE]));
1993
1994 if (sinfo[NL80211_STA_INFO_LOCAL_PM])
1995 power_mode_to_str(e->local_ps, sinfo[NL80211_STA_INFO_LOCAL_PM]);
1996 if (sinfo[NL80211_STA_INFO_PEER_PM])
1997 power_mode_to_str(e->peer_ps, sinfo[NL80211_STA_INFO_PEER_PM]);
1998 if (sinfo[NL80211_STA_INFO_NONPEER_PM])
1999 power_mode_to_str(e->nonpeer_ps, sinfo[NL80211_STA_INFO_NONPEER_PM]);
2000
2001 /* Station flags */
2002 if (sinfo[NL80211_STA_INFO_STA_FLAGS])
2003 {
2004 sta_flags = (struct nl80211_sta_flag_update *)
2005 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
2006
2007 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
2008 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
2009 e->is_authorized = 1;
2010
2011 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
2012 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
2013 e->is_authenticated = 1;
2014
2015 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
2016 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
2017 e->is_preamble_short = 1;
2018
2019 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
2020 sta_flags->set & BIT(NL80211_STA_FLAG_WME))
2021 e->is_wme = 1;
2022
2023 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
2024 sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
2025 e->is_mfp = 1;
2026
2027 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
2028 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2029 e->is_tdls = 1;
2030 }
2031 }
2032
2033 e->noise = 0; /* filled in by caller */
2034 arr->count++;
2035
2036 return NL_SKIP;
2037 }
2038
2039 static int nl80211_get_survey(const char *ifname, char *buf, int *len)
2040 {
2041 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2042 int rc;
2043
2044 rc = nl80211_request(ifname, NL80211_CMD_GET_SURVEY,
2045 NLM_F_DUMP, nl80211_get_survey_cb, &arr);
2046 if (!rc)
2047 *len = (arr.count * sizeof(struct iwinfo_survey_entry));
2048 else
2049 *len = 0;
2050
2051 return 0;
2052 }
2053
2054 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
2055 {
2056 DIR *d;
2057 int i, noise = 0;
2058 struct dirent *de;
2059 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2060 struct iwinfo_assoclist_entry *e;
2061
2062 if ((d = opendir("/sys/class/net")) != NULL)
2063 {
2064 while ((de = readdir(d)) != NULL)
2065 {
2066 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
2067 (!de->d_name[strlen(ifname)] ||
2068 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
2069 {
2070 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
2071 NLM_F_DUMP, nl80211_get_assoclist_cb, &arr);
2072 }
2073 }
2074
2075 closedir(d);
2076
2077 if (!nl80211_get_noise(ifname, &noise))
2078 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
2079 e->noise = noise;
2080
2081 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
2082 return 0;
2083 }
2084
2085 return -1;
2086 }
2087
2088 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
2089 {
2090 int *dbm_max = arg;
2091 int ch_cur, ch_cmp, bands_remain, freqs_remain;
2092
2093 struct nlattr **attr = nl80211_parse(msg);
2094 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2095 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2096 struct nlattr *band, *freq;
2097
2098 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2099 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2100 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2101 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2102 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2103 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2104 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2105 };
2106
2107 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
2108 *dbm_max = -1;
2109
2110 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2111 {
2112 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
2113 nla_len(band), NULL);
2114
2115 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2116 {
2117 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2118 nla_data(freq), nla_len(freq), freq_policy);
2119
2120 ch_cmp = nl80211_freq2channel(nla_get_u32(
2121 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
2122
2123 if ((!ch_cur || (ch_cmp == ch_cur)) &&
2124 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
2125 {
2126 *dbm_max = (int)(0.01 * nla_get_u32(
2127 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
2128
2129 break;
2130 }
2131 }
2132 }
2133
2134 return NL_SKIP;
2135 }
2136
2137 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
2138 {
2139 int err, ch_cur;
2140 int dbm_max = -1, dbm_cur, dbm_cnt;
2141 struct nl80211_msg_conveyor *req;
2142 struct iwinfo_txpwrlist_entry entry;
2143
2144 if (nl80211_get_channel(ifname, &ch_cur))
2145 ch_cur = 0;
2146
2147 /* initialize the value pointer with channel for callback */
2148 dbm_max = ch_cur;
2149
2150 err = nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2151 nl80211_get_txpwrlist_cb, &dbm_max);
2152
2153 if (!err)
2154 {
2155 for (dbm_cur = 0, dbm_cnt = 0;
2156 dbm_cur < dbm_max;
2157 dbm_cur++, dbm_cnt++)
2158 {
2159 entry.dbm = dbm_cur;
2160 entry.mw = iwinfo_dbm2mw(dbm_cur);
2161
2162 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2163 }
2164
2165 entry.dbm = dbm_max;
2166 entry.mw = iwinfo_dbm2mw(dbm_max);
2167
2168 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2169 dbm_cnt++;
2170
2171 *len = dbm_cnt * sizeof(entry);
2172 return 0;
2173 }
2174
2175 return -1;
2176 }
2177
2178 static void nl80211_get_scancrypto(char *spec, struct iwinfo_crypto_entry *c)
2179 {
2180 int wpa_version = 0;
2181 char *p, *proto, *suites;
2182
2183 c->enabled = 0;
2184
2185 for (p = strtok(spec, "[]"); p != NULL; p = strtok(NULL, "[]")) {
2186 proto = strtok(p, "-");
2187 suites = strtok(NULL, "]");
2188
2189 if (!proto || !suites)
2190 continue;
2191
2192 if (!strcmp(proto, "WPA2") || !strcmp(proto, "RSN"))
2193 wpa_version = 2;
2194 else if (!strcmp(proto, "WPA"))
2195 wpa_version = 1;
2196 else
2197 continue;
2198
2199 c->enabled = 1;
2200
2201 parse_wpa_suites(suites, wpa_version, &c->wpa_version, &c->auth_suites);
2202 parse_wpa_ciphers(suites, &c->pair_ciphers);
2203 }
2204 }
2205
2206
2207 struct nl80211_scanlist {
2208 struct iwinfo_scanlist_entry *e;
2209 int len;
2210 };
2211
2212
2213 static void nl80211_get_scanlist_ie(struct nlattr **bss,
2214 struct iwinfo_scanlist_entry *e)
2215 {
2216 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2217 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2218 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
2219 int len;
2220
2221 while (ielen >= 2 && ielen >= ie[1])
2222 {
2223 switch (ie[0])
2224 {
2225 case 0: /* SSID */
2226 case 114: /* Mesh ID */
2227 if (e->ssid[0] == 0) {
2228 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
2229 memcpy(e->ssid, ie + 2, len);
2230 e->ssid[len] = 0;
2231 }
2232 break;
2233
2234 case 48: /* RSN */
2235 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
2236 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
2237 break;
2238
2239 case 221: /* Vendor */
2240 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
2241 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
2242 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
2243 break;
2244 }
2245
2246 ielen -= ie[1] + 2;
2247 ie += ie[1] + 2;
2248 }
2249 }
2250
2251 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
2252 {
2253 int8_t rssi;
2254 uint16_t caps;
2255
2256 struct nl80211_scanlist *sl = arg;
2257 struct nlattr **tb = nl80211_parse(msg);
2258 struct nlattr *bss[NL80211_BSS_MAX + 1];
2259
2260 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2261 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2262 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2263 [NL80211_BSS_BSSID] = { 0 },
2264 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2265 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2266 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
2267 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2268 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2269 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2270 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2271 [NL80211_BSS_BEACON_IES] = { 0 },
2272 };
2273
2274 if (!tb[NL80211_ATTR_BSS] ||
2275 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2276 bss_policy) ||
2277 !bss[NL80211_BSS_BSSID])
2278 {
2279 return NL_SKIP;
2280 }
2281
2282 if (bss[NL80211_BSS_CAPABILITY])
2283 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2284 else
2285 caps = 0;
2286
2287 memset(sl->e, 0, sizeof(*sl->e));
2288 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
2289
2290 if (caps & (1<<1))
2291 sl->e->mode = IWINFO_OPMODE_ADHOC;
2292 else if (caps & (1<<0))
2293 sl->e->mode = IWINFO_OPMODE_MASTER;
2294 else
2295 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
2296
2297 if (caps & (1<<4))
2298 sl->e->crypto.enabled = 1;
2299
2300 if (bss[NL80211_BSS_FREQUENCY])
2301 sl->e->channel = nl80211_freq2channel(nla_get_u32(
2302 bss[NL80211_BSS_FREQUENCY]));
2303
2304 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
2305 nl80211_get_scanlist_ie(bss, sl->e);
2306
2307 if (bss[NL80211_BSS_SIGNAL_MBM])
2308 {
2309 sl->e->signal =
2310 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
2311
2312 rssi = sl->e->signal - 0x100;
2313
2314 if (rssi < -110)
2315 rssi = -110;
2316 else if (rssi > -40)
2317 rssi = -40;
2318
2319 sl->e->quality = (rssi + 110);
2320 sl->e->quality_max = 70;
2321 }
2322
2323 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
2324 {
2325 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2326 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2327 }
2328
2329 sl->e++;
2330 sl->len++;
2331
2332 return NL_SKIP;
2333 }
2334
2335 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
2336 {
2337 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
2338
2339 if (nl80211_request(ifname, NL80211_CMD_TRIGGER_SCAN, 0, NULL, NULL))
2340 goto out;
2341
2342 if (nl80211_wait("nl80211", "scan",
2343 NL80211_CMD_NEW_SCAN_RESULTS, NL80211_CMD_SCAN_ABORTED))
2344 goto out;
2345
2346 if (nl80211_request(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
2347 nl80211_get_scanlist_cb, &sl))
2348 goto out;
2349
2350 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
2351 return 0;
2352
2353 out:
2354 *len = 0;
2355 return -1;
2356 }
2357
2358 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
2359 {
2360 #define hex(x) \
2361 (((x) >= 'a') ? ((x) - 'a' + 10) : \
2362 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0')))
2363
2364 int len = 0;
2365
2366 while (*in)
2367 {
2368 if (len + 1 >= outlen)
2369 break;
2370
2371 switch (*in)
2372 {
2373 case '\\':
2374 in++;
2375 switch (*in)
2376 {
2377 case 'n':
2378 out[len++] = '\n'; in++;
2379 break;
2380
2381 case 'r':
2382 out[len++] = '\r'; in++;
2383 break;
2384
2385 case 't':
2386 out[len++] = '\t'; in++;
2387 break;
2388
2389 case 'e':
2390 out[len++] = '\033'; in++;
2391 break;
2392
2393 case 'x':
2394 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
2395 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
2396 in += 3;
2397 break;
2398
2399 default:
2400 out[len++] = *in++;
2401 break;
2402 }
2403 break;
2404
2405 default:
2406 out[len++] = *in++;
2407 break;
2408 }
2409 }
2410
2411 if (outlen > len)
2412 out[len] = '\0';
2413
2414 return len;
2415 }
2416
2417 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len)
2418 {
2419 int sock, qmax, rssi, tries, count = -1, ready = 0;
2420 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096];
2421 struct sockaddr_un local = { 0 };
2422 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
2423
2424 sock = nl80211_wpactl_connect(ifname, &local);
2425
2426 if (sock < 0)
2427 return sock;
2428
2429 send(sock, "ATTACH", 6, 0);
2430 send(sock, "SCAN", 4, 0);
2431
2432 /*
2433 * wait for scan results:
2434 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan
2435 * 72 channels at most. We'll also receive two "OK" messages acknowledging
2436 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra
2437 * time to process the results, so try 72 + 2 + 1 times.
2438 */
2439 for (tries = 0; tries < 75; tries++)
2440 {
2441 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0)
2442 continue;
2443
2444 /* got an event notification */
2445 if (reply[0] == '<')
2446 {
2447 /* scan results are ready */
2448 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS"))
2449 {
2450 /* send "SCAN_RESULTS" command */
2451 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12);
2452 break;
2453 }
2454
2455 /* is another unrelated event, retry */
2456 tries--;
2457 }
2458
2459 /* got a failure reply */
2460 else if (!strcmp(reply, "FAIL-BUSY\n"))
2461 {
2462 break;
2463 }
2464 }
2465
2466 /* receive and parse scan results if the wait above didn't time out */
2467 while (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
2468 {
2469 /* received an event notification, receive again */
2470 if (reply[0] == '<')
2471 continue;
2472
2473 nl80211_get_quality_max(ifname, &qmax);
2474
2475 for (line = strtok_r(reply, "\n", &pos);
2476 line != NULL;
2477 line = strtok_r(NULL, "\n", &pos))
2478 {
2479 /* skip header line */
2480 if (count < 0)
2481 {
2482 count++;
2483 continue;
2484 }
2485
2486 bssid = strtok(line, "\t");
2487 freq = strtok(NULL, "\t");
2488 signal = strtok(NULL, "\t");
2489 flags = strtok(NULL, "\t");
2490 ssid = strtok(NULL, "\n");
2491
2492 if (!bssid || !freq || !signal || !flags || !ssid)
2493 continue;
2494
2495 /* BSSID */
2496 e->mac[0] = strtol(&bssid[0], NULL, 16);
2497 e->mac[1] = strtol(&bssid[3], NULL, 16);
2498 e->mac[2] = strtol(&bssid[6], NULL, 16);
2499 e->mac[3] = strtol(&bssid[9], NULL, 16);
2500 e->mac[4] = strtol(&bssid[12], NULL, 16);
2501 e->mac[5] = strtol(&bssid[15], NULL, 16);
2502
2503 /* SSID */
2504 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2505
2506 /* Mode */
2507 if (strstr(flags, "[MESH]"))
2508 e->mode = IWINFO_OPMODE_MESHPOINT;
2509 else if (strstr(flags, "[IBSS]"))
2510 e->mode = IWINFO_OPMODE_ADHOC;
2511 else
2512 e->mode = IWINFO_OPMODE_MASTER;
2513
2514 /* Channel */
2515 e->channel = nl80211_freq2channel(atoi(freq));
2516
2517 /* Signal */
2518 rssi = atoi(signal);
2519 e->signal = rssi;
2520
2521 /* Quality */
2522 if (rssi < 0)
2523 {
2524 /* The cfg80211 wext compat layer assumes a signal range
2525 * of -110 dBm to -40 dBm, the quality value is derived
2526 * by adding 110 to the signal level */
2527 if (rssi < -110)
2528 rssi = -110;
2529 else if (rssi > -40)
2530 rssi = -40;
2531
2532 e->quality = (rssi + 110);
2533 }
2534 else
2535 {
2536 e->quality = rssi;
2537 }
2538
2539 /* Max. Quality */
2540 e->quality_max = qmax;
2541
2542 /* Crypto */
2543 nl80211_get_scancrypto(flags, &e->crypto);
2544
2545 count++;
2546 e++;
2547 }
2548
2549 *len = count * sizeof(struct iwinfo_scanlist_entry);
2550 break;
2551 }
2552
2553 close(sock);
2554 unlink(local.sun_path);
2555
2556 return (count >= 0) ? 0 : -1;
2557 }
2558
2559 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
2560 {
2561 char *res;
2562 int rv, mode;
2563
2564 *len = 0;
2565
2566 /* Got a radioX pseudo interface, find some interface on it or create one */
2567 if (!strncmp(ifname, "radio", 5))
2568 {
2569 /* Reuse existing interface */
2570 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2571 {
2572 return nl80211_get_scanlist(res, buf, len);
2573 }
2574
2575 /* Need to spawn a temporary iface for scanning */
2576 else if ((res = nl80211_ifadd(ifname)) != NULL)
2577 {
2578 rv = nl80211_get_scanlist(res, buf, len);
2579 nl80211_ifdel(res);
2580 return rv;
2581 }
2582 }
2583
2584 /* WPA supplicant */
2585 if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
2586 {
2587 return 0;
2588 }
2589
2590 /* station / ad-hoc / monitor scan */
2591 else if (!nl80211_get_mode(ifname, &mode) &&
2592 (mode == IWINFO_OPMODE_ADHOC ||
2593 mode == IWINFO_OPMODE_MASTER ||
2594 mode == IWINFO_OPMODE_CLIENT ||
2595 mode == IWINFO_OPMODE_MONITOR) &&
2596 iwinfo_ifup(ifname))
2597 {
2598 return nl80211_get_scanlist_nl(ifname, buf, len);
2599 }
2600
2601 /* AP scan */
2602 else
2603 {
2604 /* Got a temp interface, don't create yet another one */
2605 if (!strncmp(ifname, "tmp.", 4))
2606 {
2607 if (!iwinfo_ifup(ifname))
2608 return -1;
2609
2610 rv = nl80211_get_scanlist_nl(ifname, buf, len);
2611 iwinfo_ifdown(ifname);
2612 return rv;
2613 }
2614
2615 /* Spawn a new scan interface */
2616 else
2617 {
2618 if (!(res = nl80211_ifadd(ifname)))
2619 return -1;
2620
2621 iwinfo_ifmac(res);
2622
2623 /* if we can take the new interface up, the driver supports an
2624 * additional interface and there's no need to tear down the ap */
2625 if (iwinfo_ifup(res))
2626 {
2627 rv = nl80211_get_scanlist_nl(res, buf, len);
2628 iwinfo_ifdown(res);
2629 }
2630
2631 /* driver cannot create secondary interface, take down ap
2632 * during scan */
2633 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2634 {
2635 rv = nl80211_get_scanlist_nl(res, buf, len);
2636 iwinfo_ifdown(res);
2637 iwinfo_ifup(ifname);
2638 nl80211_hostapd_hup(ifname);
2639 }
2640
2641 nl80211_ifdel(res);
2642 return rv;
2643 }
2644 }
2645
2646 return -1;
2647 }
2648
2649 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2650 {
2651 int bands_remain, freqs_remain;
2652
2653 struct nl80211_array_buf *arr = arg;
2654 struct iwinfo_freqlist_entry *e;
2655
2656 struct nlattr **attr = nl80211_parse(msg);
2657 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2658 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2659 struct nlattr *band, *freq;
2660
2661 e = arr->buf;
2662 e += arr->count;
2663
2664 if (attr[NL80211_ATTR_WIPHY_BANDS]) {
2665 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2666 {
2667 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2668 nla_data(band), nla_len(band), NULL);
2669
2670 if (bands[NL80211_BAND_ATTR_FREQS]) {
2671 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2672 {
2673 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2674 nla_data(freq), nla_len(freq), NULL);
2675
2676 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2677 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2678 continue;
2679
2680 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2681 e->channel = nl80211_freq2channel(e->mhz);
2682
2683 e->restricted = (
2684 freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
2685 !freqs[NL80211_FREQUENCY_ATTR_RADAR]
2686 ) ? 1 : 0;
2687
2688 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_MINUS])
2689 e->flags |= IWINFO_FREQ_NO_HT40MINUS;
2690 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_PLUS])
2691 e->flags |= IWINFO_FREQ_NO_HT40PLUS;
2692 if (freqs[NL80211_FREQUENCY_ATTR_NO_80MHZ])
2693 e->flags |= IWINFO_FREQ_NO_80MHZ;
2694 if (freqs[NL80211_FREQUENCY_ATTR_NO_160MHZ])
2695 e->flags |= IWINFO_FREQ_NO_160MHZ;
2696 if (freqs[NL80211_FREQUENCY_ATTR_NO_20MHZ])
2697 e->flags |= IWINFO_FREQ_NO_20MHZ;
2698 if (freqs[NL80211_FREQUENCY_ATTR_NO_10MHZ])
2699 e->flags |= IWINFO_FREQ_NO_10MHZ;
2700
2701 e++;
2702 arr->count++;
2703 }
2704 }
2705 }
2706 }
2707
2708 return NL_SKIP;
2709 }
2710
2711 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2712 {
2713 struct nl80211_msg_conveyor *cv;
2714 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2715 uint32_t features = nl80211_get_protocol_features(ifname);
2716 int flags;
2717
2718 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
2719 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
2720 if (!cv)
2721 goto out;
2722
2723 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
2724 if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr))
2725 goto out;
2726
2727 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2728 return 0;
2729
2730 nla_put_failure:
2731 nl80211_free(cv);
2732 out:
2733 *len = 0;
2734 return -1;
2735 }
2736
2737 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2738 {
2739 char *buf = arg;
2740 struct nlattr **attr = nl80211_parse(msg);
2741
2742 if (attr[NL80211_ATTR_REG_ALPHA2])
2743 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2744 else
2745 buf[0] = 0;
2746
2747 return NL_SKIP;
2748 }
2749
2750 static int nl80211_get_country(const char *ifname, char *buf)
2751 {
2752 if (nl80211_request(ifname, NL80211_CMD_GET_REG, 0,
2753 nl80211_get_country_cb, buf))
2754 return -1;
2755
2756 return 0;
2757 }
2758
2759 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2760 {
2761 int count;
2762 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2763 const struct iwinfo_iso3166_label *l;
2764
2765 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2766 {
2767 e->iso3166 = l->iso3166;
2768 e->ccode[0] = (l->iso3166 / 256);
2769 e->ccode[1] = (l->iso3166 % 256);
2770 e->ccode[2] = 0;
2771 }
2772
2773 *len = (count * sizeof(struct iwinfo_country_entry));
2774 return 0;
2775 }
2776
2777
2778 struct nl80211_modes
2779 {
2780 bool ok;
2781 uint32_t hw;
2782 uint32_t ht;
2783 };
2784
2785 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
2786 {
2787 struct nl80211_modes *m = arg;
2788 int bands_remain, freqs_remain;
2789 uint16_t caps = 0;
2790 uint32_t vht_caps = 0;
2791 struct nlattr **attr = nl80211_parse(msg);
2792 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2793 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2794 struct nlattr *band, *freq;
2795
2796 if (attr[NL80211_ATTR_WIPHY_BANDS])
2797 {
2798 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2799 {
2800 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2801 nla_data(band), nla_len(band), NULL);
2802
2803 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2804 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2805
2806 /* Treat any nonzero capability as 11n */
2807 if (caps > 0)
2808 {
2809 m->hw |= IWINFO_80211_N;
2810 m->ht |= IWINFO_HTMODE_HT20;
2811
2812 if (caps & (1 << 1))
2813 m->ht |= IWINFO_HTMODE_HT40;
2814 }
2815
2816 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2817 freqs_remain)
2818 {
2819 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2820 nla_data(freq), nla_len(freq), NULL);
2821
2822 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2823 continue;
2824
2825 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2826 {
2827 m->hw |= IWINFO_80211_B;
2828 m->hw |= IWINFO_80211_G;
2829 }
2830 else if (bands[NL80211_BAND_ATTR_VHT_CAPA])
2831 {
2832 vht_caps = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
2833
2834 /* Treat any nonzero capability as 11ac */
2835 if (vht_caps > 0)
2836 {
2837 m->hw |= IWINFO_80211_AC;
2838 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
2839
2840 switch ((vht_caps >> 2) & 3)
2841 {
2842 case 2:
2843 m->ht |= IWINFO_HTMODE_VHT80_80;
2844 /* fall through */
2845
2846 case 1:
2847 m->ht |= IWINFO_HTMODE_VHT160;
2848 }
2849 }
2850 }
2851 else if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) >= 56160)
2852 {
2853 m->hw |= IWINFO_80211_AD;
2854 }
2855 else if (!(m->hw & IWINFO_80211_AC))
2856 {
2857 m->hw |= IWINFO_80211_A;
2858 }
2859 }
2860 }
2861
2862 m->ok = 1;
2863 }
2864
2865 return NL_SKIP;
2866 }
2867
2868 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
2869 {
2870 struct nl80211_modes m = { 0 };
2871
2872 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2873 nl80211_get_modelist_cb, &m))
2874 goto out;
2875
2876 if (!m.ok)
2877 goto out;
2878
2879 *buf = m.hw;
2880 return 0;
2881
2882 out:
2883 *buf = 0;
2884 return -1;
2885 }
2886
2887 static int nl80211_get_htmodelist(const char *ifname, int *buf)
2888 {
2889 struct nl80211_modes m = { 0 };
2890
2891 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2892 nl80211_get_modelist_cb, &m))
2893 goto out;
2894
2895 if (!m.ok)
2896 goto out;
2897
2898 *buf = m.ht;
2899 return 0;
2900
2901 out:
2902 *buf = 0;
2903 return -1;
2904 }
2905
2906
2907 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
2908 {
2909 struct nlattr **attr = nl80211_parse(msg);
2910 struct nlattr *comb;
2911 int *ret = arg;
2912 int comb_rem, limit_rem, mode_rem;
2913
2914 *ret = 0;
2915 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
2916 return NL_SKIP;
2917
2918 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
2919 {
2920 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
2921 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
2922 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
2923 };
2924 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1];
2925 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
2926 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
2927 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
2928 };
2929 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1];
2930 struct nlattr *limit;
2931
2932 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy);
2933
2934 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
2935 continue;
2936
2937 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
2938 {
2939 struct nlattr *mode;
2940
2941 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
2942
2943 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
2944 !tb_limit[NL80211_IFACE_LIMIT_MAX])
2945 continue;
2946
2947 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
2948 continue;
2949
2950 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
2951 if (nla_type(mode) == NL80211_IFTYPE_AP)
2952 *ret = 1;
2953 }
2954 }
2955 }
2956
2957 return NL_SKIP;
2958 }
2959
2960 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
2961 {
2962 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2963 nl80211_get_ifcomb_cb, buf))
2964 return -1;
2965
2966 return 0;
2967 }
2968
2969 static int nl80211_get_hardware_id(const char *ifname, char *buf)
2970 {
2971 struct iwinfo_hardware_id *id = (struct iwinfo_hardware_id *)buf;
2972 char *phy, num[8], path[PATH_MAX];
2973 int i;
2974
2975 struct { const char *path; uint16_t *dest; } lookup[] = {
2976 { "vendor", &id->vendor_id },
2977 { "device", &id->device_id },
2978 { "subsystem_vendor", &id->subsystem_vendor_id },
2979 { "subsystem_device", &id->subsystem_device_id }
2980 };
2981
2982 memset(id, 0, sizeof(*id));
2983
2984 /* Try to determine the phy name from the given interface */
2985 phy = nl80211_ifname2phy(ifname);
2986
2987 for (i = 0; i < ARRAY_SIZE(lookup); i++)
2988 {
2989 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/%s",
2990 phy ? "ieee80211" : "net",
2991 phy ? phy : ifname, lookup[i].path);
2992
2993 if (nl80211_readstr(path, num, sizeof(num)) > 0)
2994 *lookup[i].dest = strtoul(num, NULL, 16);
2995 }
2996
2997 /* Failed to obtain hardware IDs, search board config */
2998 if (id->vendor_id == 0 || id->device_id == 0)
2999 return iwinfo_hardware_id_from_mtd(id);
3000
3001 return 0;
3002 }
3003
3004 static const struct iwinfo_hardware_entry *
3005 nl80211_get_hardware_entry(const char *ifname)
3006 {
3007 struct iwinfo_hardware_id id;
3008
3009 if (nl80211_get_hardware_id(ifname, (char *)&id))
3010 return NULL;
3011
3012 return iwinfo_hardware(&id);
3013 }
3014
3015 static int nl80211_get_hardware_name(const char *ifname, char *buf)
3016 {
3017 const struct iwinfo_hardware_entry *hw;
3018
3019 if (!(hw = nl80211_get_hardware_entry(ifname)))
3020 sprintf(buf, "Generic MAC80211");
3021 else
3022 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
3023
3024 return 0;
3025 }
3026
3027 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
3028 {
3029 const struct iwinfo_hardware_entry *hw;
3030
3031 if (!(hw = nl80211_get_hardware_entry(ifname)))
3032 return -1;
3033
3034 *buf = hw->txpower_offset;
3035 return 0;
3036 }
3037
3038 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
3039 {
3040 const struct iwinfo_hardware_entry *hw;
3041
3042 if (!(hw = nl80211_get_hardware_entry(ifname)))
3043 return -1;
3044
3045 *buf = hw->frequency_offset;
3046 return 0;
3047 }
3048
3049 static int nl80211_lookup_phyname(const char *section, char *buf)
3050 {
3051 int idx;
3052
3053 if ((idx = nl80211_phy_idx_from_uci(section)) < 0)
3054 return -1;
3055
3056 sprintf(buf, "phy%d", idx);
3057 return 0;
3058 }
3059
3060 const struct iwinfo_ops nl80211_ops = {
3061 .name = "nl80211",
3062 .probe = nl80211_probe,
3063 .channel = nl80211_get_channel,
3064 .frequency = nl80211_get_frequency,
3065 .frequency_offset = nl80211_get_frequency_offset,
3066 .txpower = nl80211_get_txpower,
3067 .txpower_offset = nl80211_get_txpower_offset,
3068 .bitrate = nl80211_get_bitrate,
3069 .signal = nl80211_get_signal,
3070 .noise = nl80211_get_noise,
3071 .quality = nl80211_get_quality,
3072 .quality_max = nl80211_get_quality_max,
3073 .mbssid_support = nl80211_get_mbssid_support,
3074 .hwmodelist = nl80211_get_hwmodelist,
3075 .htmodelist = nl80211_get_htmodelist,
3076 .mode = nl80211_get_mode,
3077 .ssid = nl80211_get_ssid,
3078 .bssid = nl80211_get_bssid,
3079 .country = nl80211_get_country,
3080 .hardware_id = nl80211_get_hardware_id,
3081 .hardware_name = nl80211_get_hardware_name,
3082 .encryption = nl80211_get_encryption,
3083 .phyname = nl80211_get_phyname,
3084 .assoclist = nl80211_get_assoclist,
3085 .txpwrlist = nl80211_get_txpwrlist,
3086 .scanlist = nl80211_get_scanlist,
3087 .freqlist = nl80211_get_freqlist,
3088 .countrylist = nl80211_get_countrylist,
3089 .survey = nl80211_get_survey,
3090 .lookup_phy = nl80211_lookup_phyname,
3091 .close = nl80211_close
3092 };
Library for accessing wireless device drivers