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nl80211: support reading hardware id from phy directly
[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 int nl80211_get_encryption(const char *ifname, char *buf)
1496 {
1497 char wpa[2], wpa_key_mgmt[16], wpa_pairwise[16], wpa_groupwise[16];
1498 char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27];
1499
1500 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1501
1502 /* WPA supplicant */
1503 if (nl80211_wpactl_query(ifname,
1504 "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise),
1505 "group_cipher", wpa_groupwise, sizeof(wpa_groupwise),
1506 "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt)))
1507 {
1508 /* WEP */
1509 if (!strcmp(wpa_key_mgmt, "NONE"))
1510 {
1511 if (strstr(wpa_pairwise, "WEP-40"))
1512 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1513 else if (strstr(wpa_pairwise, "WEP-104"))
1514 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1515
1516 if (strstr(wpa_groupwise, "WEP-40"))
1517 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1518 else if (strstr(wpa_groupwise, "WEP-104"))
1519 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1520
1521 c->enabled = !!(c->pair_ciphers | c->group_ciphers);
1522 c->auth_suites |= IWINFO_KMGMT_NONE;
1523 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1524 }
1525
1526 /* WPA */
1527 else if (strstr(wpa_key_mgmt, "WPA"))
1528 {
1529 if (strstr(wpa_pairwise, "TKIP"))
1530 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1531 else if (strstr(wpa_pairwise, "CCMP"))
1532 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1533 else if (strstr(wpa_pairwise, "NONE"))
1534 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1535 else if (strstr(wpa_pairwise, "WEP-40"))
1536 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1537 else if (strstr(wpa_pairwise, "WEP-104"))
1538 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1539
1540 if (strstr(wpa_groupwise, "TKIP"))
1541 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1542 else if (strstr(wpa_groupwise, "CCMP"))
1543 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1544 else if (strstr(wpa_groupwise, "NONE"))
1545 c->group_ciphers |= IWINFO_CIPHER_NONE;
1546 else if (strstr(wpa_groupwise, "WEP-40"))
1547 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1548 else if (strstr(wpa_groupwise, "WEP-104"))
1549 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1550
1551 if (strstr(wpa_key_mgmt, "WPA2"))
1552 c->wpa_version = 2;
1553 else if (strstr(wpa_key_mgmt, "WPA"))
1554 c->wpa_version = 1;
1555
1556 if (strstr(wpa_key_mgmt, "PSK"))
1557 c->auth_suites |= IWINFO_KMGMT_PSK;
1558 else if (strstr(wpa_key_mgmt, "EAP") ||
1559 strstr(wpa_key_mgmt, "802.1X"))
1560 c->auth_suites |= IWINFO_KMGMT_8021x;
1561 else if (strstr(wpa_key_mgmt, "NONE"))
1562 c->auth_suites |= IWINFO_KMGMT_NONE;
1563
1564 c->enabled = !!(c->wpa_version && c->auth_suites);
1565 }
1566
1567 return 0;
1568 }
1569
1570 /* Hostapd */
1571 else if (nl80211_hostapd_query(ifname,
1572 "wpa", wpa, sizeof(wpa),
1573 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1574 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise),
1575 "auth_algs", auth_algs, sizeof(auth_algs),
1576 "wep_key0", wep_key0, sizeof(wep_key0),
1577 "wep_key1", wep_key1, sizeof(wep_key1),
1578 "wep_key2", wep_key2, sizeof(wep_key2),
1579 "wep_key3", wep_key3, sizeof(wep_key3)))
1580 {
1581 c->wpa_version = wpa[0] ? atoi(wpa) : 0;
1582
1583 if (wpa_key_mgmt[0])
1584 {
1585 if (strstr(wpa_key_mgmt, "PSK"))
1586 c->auth_suites |= IWINFO_KMGMT_PSK;
1587
1588 if (strstr(wpa_key_mgmt, "EAP"))
1589 c->auth_suites |= IWINFO_KMGMT_8021x;
1590
1591 if (strstr(wpa_key_mgmt, "NONE"))
1592 c->auth_suites |= IWINFO_KMGMT_NONE;
1593 }
1594 else
1595 {
1596 c->auth_suites |= IWINFO_KMGMT_PSK;
1597 }
1598
1599 if (wpa_pairwise[0])
1600 {
1601 if (strstr(wpa_pairwise, "TKIP"))
1602 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1603
1604 if (strstr(wpa_pairwise, "CCMP"))
1605 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1606
1607 if (strstr(wpa_pairwise, "NONE"))
1608 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1609 }
1610
1611 if (auth_algs[0])
1612 {
1613 switch(atoi(auth_algs))
1614 {
1615 case 1:
1616 c->auth_algs |= IWINFO_AUTH_OPEN;
1617 break;
1618
1619 case 2:
1620 c->auth_algs |= IWINFO_AUTH_SHARED;
1621 break;
1622
1623 case 3:
1624 c->auth_algs |= IWINFO_AUTH_OPEN;
1625 c->auth_algs |= IWINFO_AUTH_SHARED;
1626 break;
1627 }
1628
1629 c->pair_ciphers |= nl80211_check_wepkey(wep_key0);
1630 c->pair_ciphers |= nl80211_check_wepkey(wep_key1);
1631 c->pair_ciphers |= nl80211_check_wepkey(wep_key2);
1632 c->pair_ciphers |= nl80211_check_wepkey(wep_key3);
1633 }
1634
1635 c->group_ciphers = c->pair_ciphers;
1636 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1637
1638 return 0;
1639 }
1640
1641 return -1;
1642 }
1643
1644 static int nl80211_get_phyname(const char *ifname, char *buf)
1645 {
1646 const char *name;
1647
1648 name = nl80211_ifname2phy(ifname);
1649
1650 if (name)
1651 {
1652 strcpy(buf, name);
1653 return 0;
1654 }
1655 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1656 {
1657 name = nl80211_ifname2phy(name);
1658
1659 if (name)
1660 {
1661 strcpy(buf, ifname);
1662 return 0;
1663 }
1664 }
1665
1666 return -1;
1667 }
1668
1669
1670 static void nl80211_parse_rateinfo(struct nlattr **ri,
1671 struct iwinfo_rate_entry *re)
1672 {
1673 if (ri[NL80211_RATE_INFO_BITRATE32])
1674 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100;
1675 else if (ri[NL80211_RATE_INFO_BITRATE])
1676 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100;
1677
1678 if (ri[NL80211_RATE_INFO_VHT_MCS])
1679 {
1680 re->is_vht = 1;
1681 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]);
1682
1683 if (ri[NL80211_RATE_INFO_VHT_NSS])
1684 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]);
1685 }
1686 else if (ri[NL80211_RATE_INFO_MCS])
1687 {
1688 re->is_ht = 1;
1689 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]);
1690 }
1691
1692 if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH])
1693 re->mhz = 5;
1694 else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH])
1695 re->mhz = 10;
1696 else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH])
1697 re->mhz = 40;
1698 else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH])
1699 re->mhz = 80;
1700 else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] ||
1701 ri[NL80211_RATE_INFO_160_MHZ_WIDTH])
1702 re->mhz = 160;
1703 else
1704 re->mhz = 20;
1705
1706 if (ri[NL80211_RATE_INFO_SHORT_GI])
1707 re->is_short_gi = 1;
1708
1709 re->is_40mhz = (re->mhz == 40);
1710 }
1711
1712 static int nl80211_get_survey_cb(struct nl_msg *msg, void *arg)
1713 {
1714 struct nl80211_array_buf *arr = arg;
1715 struct iwinfo_survey_entry *e = arr->buf;
1716 struct nlattr **attr = nl80211_parse(msg);
1717 struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
1718 int rc;
1719
1720 static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
1721 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1722 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1723 [NL80211_SURVEY_INFO_TIME] = { .type = NLA_U64 },
1724 [NL80211_SURVEY_INFO_TIME_BUSY] = { .type = NLA_U64 },
1725 [NL80211_SURVEY_INFO_TIME_EXT_BUSY] = { .type = NLA_U64 },
1726 [NL80211_SURVEY_INFO_TIME_RX] = { .type = NLA_U64 },
1727 [NL80211_SURVEY_INFO_TIME_TX] = { .type = NLA_U64 },
1728 };
1729
1730 rc = nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
1731 attr[NL80211_ATTR_SURVEY_INFO],
1732 survey_policy);
1733 if (rc)
1734 return NL_SKIP;
1735
1736 /* advance to end of array */
1737 e += arr->count;
1738 memset(e, 0, sizeof(*e));
1739
1740 if (sinfo[NL80211_SURVEY_INFO_FREQUENCY])
1741 e->mhz = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]);
1742
1743 if (sinfo[NL80211_SURVEY_INFO_NOISE])
1744 e->noise = nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
1745
1746 if (sinfo[NL80211_SURVEY_INFO_TIME])
1747 e->active_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME]);
1748
1749 if (sinfo[NL80211_SURVEY_INFO_TIME_BUSY])
1750 e->busy_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_BUSY]);
1751
1752 if (sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY])
1753 e->busy_time_ext = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]);
1754
1755 if (sinfo[NL80211_SURVEY_INFO_TIME_RX])
1756 e->rxtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_RX]);
1757
1758 if (sinfo[NL80211_SURVEY_INFO_TIME_TX])
1759 e->txtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_TX]);
1760
1761 arr->count++;
1762 return NL_SKIP;
1763 }
1764
1765
1766 static void plink_state_to_str(char *dst, unsigned state)
1767 {
1768 switch (state) {
1769 case NL80211_PLINK_LISTEN:
1770 strcpy(dst, "LISTEN");
1771 break;
1772 case NL80211_PLINK_OPN_SNT:
1773 strcpy(dst, "OPN_SNT");
1774 break;
1775 case NL80211_PLINK_OPN_RCVD:
1776 strcpy(dst, "OPN_RCVD");
1777 break;
1778 case NL80211_PLINK_CNF_RCVD:
1779 strcpy(dst, "CNF_RCVD");
1780 break;
1781 case NL80211_PLINK_ESTAB:
1782 strcpy(dst, "ESTAB");
1783 break;
1784 case NL80211_PLINK_HOLDING:
1785 strcpy(dst, "HOLDING");
1786 break;
1787 case NL80211_PLINK_BLOCKED:
1788 strcpy(dst, "BLOCKED");
1789 break;
1790 default:
1791 strcpy(dst, "UNKNOWN");
1792 break;
1793 }
1794 }
1795
1796 static void power_mode_to_str(char *dst, struct nlattr *a)
1797 {
1798 enum nl80211_mesh_power_mode pm = nla_get_u32(a);
1799
1800 switch (pm) {
1801 case NL80211_MESH_POWER_ACTIVE:
1802 strcpy(dst, "ACTIVE");
1803 break;
1804 case NL80211_MESH_POWER_LIGHT_SLEEP:
1805 strcpy(dst, "LIGHT SLEEP");
1806 break;
1807 case NL80211_MESH_POWER_DEEP_SLEEP:
1808 strcpy(dst, "DEEP SLEEP");
1809 break;
1810 default:
1811 strcpy(dst, "UNKNOWN");
1812 break;
1813 }
1814 }
1815
1816 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1817 {
1818 struct nl80211_array_buf *arr = arg;
1819 struct iwinfo_assoclist_entry *e = arr->buf;
1820 struct nlattr **attr = nl80211_parse(msg);
1821 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1822 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1823 struct nl80211_sta_flag_update *sta_flags;
1824
1825 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1826 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1827 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1828 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1829 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1830 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1831 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1832 [NL80211_STA_INFO_SIGNAL_AVG] = { .type = NLA_U8 },
1833 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1834 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1835 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 },
1836 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
1837 [NL80211_STA_INFO_CONNECTED_TIME]= { .type = NLA_U32 },
1838 [NL80211_STA_INFO_RX_DROP_MISC] = { .type = NLA_U64 },
1839 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 },
1840 [NL80211_STA_INFO_STA_FLAGS] =
1841 { .minlen = sizeof(struct nl80211_sta_flag_update) },
1842 [NL80211_STA_INFO_EXPECTED_THROUGHPUT] = { .type = NLA_U32 },
1843 /* mesh */
1844 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1845 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1846 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1847 [NL80211_STA_INFO_LOCAL_PM] = { .type = NLA_U32 },
1848 [NL80211_STA_INFO_PEER_PM] = { .type = NLA_U32 },
1849 [NL80211_STA_INFO_NONPEER_PM] = { .type = NLA_U32 },
1850 };
1851
1852 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1853 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1854 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1855 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1856 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1857 };
1858
1859 /* advance to end of array */
1860 e += arr->count;
1861 memset(e, 0, sizeof(*e));
1862
1863 if (attr[NL80211_ATTR_MAC])
1864 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1865
1866 if (attr[NL80211_ATTR_STA_INFO] &&
1867 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1868 attr[NL80211_ATTR_STA_INFO], stats_policy))
1869 {
1870 if (sinfo[NL80211_STA_INFO_SIGNAL])
1871 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1872
1873 if (sinfo[NL80211_STA_INFO_SIGNAL_AVG])
1874 e->signal_avg = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]);
1875
1876 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1877 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1878
1879 if (sinfo[NL80211_STA_INFO_CONNECTED_TIME])
1880 e->connected_time = nla_get_u32(sinfo[NL80211_STA_INFO_CONNECTED_TIME]);
1881
1882 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1883 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1884
1885 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1886 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1887
1888 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1889 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1890 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1891 nl80211_parse_rateinfo(rinfo, &e->rx_rate);
1892
1893 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1894 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1895 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1896 nl80211_parse_rateinfo(rinfo, &e->tx_rate);
1897
1898 if (sinfo[NL80211_STA_INFO_RX_BYTES])
1899 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
1900
1901 if (sinfo[NL80211_STA_INFO_TX_BYTES])
1902 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
1903
1904 if (sinfo[NL80211_STA_INFO_TX_RETRIES])
1905 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
1906
1907 if (sinfo[NL80211_STA_INFO_TX_FAILED])
1908 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
1909
1910 if (sinfo[NL80211_STA_INFO_T_OFFSET])
1911 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]);
1912
1913 if (sinfo[NL80211_STA_INFO_RX_DROP_MISC])
1914 e->rx_drop_misc = nla_get_u64(sinfo[NL80211_STA_INFO_RX_DROP_MISC]);
1915
1916 if (sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT])
1917 e->thr = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]);
1918
1919 /* mesh */
1920 if (sinfo[NL80211_STA_INFO_LLID])
1921 e->llid = nla_get_u16(sinfo[NL80211_STA_INFO_LLID]);
1922
1923 if (sinfo[NL80211_STA_INFO_PLID])
1924 e->plid = nla_get_u16(sinfo[NL80211_STA_INFO_PLID]);
1925
1926 if (sinfo[NL80211_STA_INFO_PLINK_STATE])
1927 plink_state_to_str(e->plink_state,
1928 nla_get_u8(sinfo[NL80211_STA_INFO_PLINK_STATE]));
1929
1930 if (sinfo[NL80211_STA_INFO_LOCAL_PM])
1931 power_mode_to_str(e->local_ps, sinfo[NL80211_STA_INFO_LOCAL_PM]);
1932 if (sinfo[NL80211_STA_INFO_PEER_PM])
1933 power_mode_to_str(e->peer_ps, sinfo[NL80211_STA_INFO_PEER_PM]);
1934 if (sinfo[NL80211_STA_INFO_NONPEER_PM])
1935 power_mode_to_str(e->nonpeer_ps, sinfo[NL80211_STA_INFO_NONPEER_PM]);
1936
1937 /* Station flags */
1938 if (sinfo[NL80211_STA_INFO_STA_FLAGS])
1939 {
1940 sta_flags = (struct nl80211_sta_flag_update *)
1941 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
1942
1943 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
1944 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
1945 e->is_authorized = 1;
1946
1947 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
1948 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1949 e->is_authenticated = 1;
1950
1951 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
1952 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1953 e->is_preamble_short = 1;
1954
1955 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
1956 sta_flags->set & BIT(NL80211_STA_FLAG_WME))
1957 e->is_wme = 1;
1958
1959 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
1960 sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
1961 e->is_mfp = 1;
1962
1963 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
1964 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1965 e->is_tdls = 1;
1966 }
1967 }
1968
1969 e->noise = 0; /* filled in by caller */
1970 arr->count++;
1971
1972 return NL_SKIP;
1973 }
1974
1975 static int nl80211_get_survey(const char *ifname, char *buf, int *len)
1976 {
1977 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1978 int rc;
1979
1980 rc = nl80211_request(ifname, NL80211_CMD_GET_SURVEY,
1981 NLM_F_DUMP, nl80211_get_survey_cb, &arr);
1982 if (!rc)
1983 *len = (arr.count * sizeof(struct iwinfo_survey_entry));
1984 else
1985 *len = 0;
1986
1987 return 0;
1988 }
1989
1990 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1991 {
1992 DIR *d;
1993 int i, noise = 0;
1994 struct dirent *de;
1995 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1996 struct iwinfo_assoclist_entry *e;
1997
1998 if ((d = opendir("/sys/class/net")) != NULL)
1999 {
2000 while ((de = readdir(d)) != NULL)
2001 {
2002 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
2003 (!de->d_name[strlen(ifname)] ||
2004 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
2005 {
2006 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
2007 NLM_F_DUMP, nl80211_get_assoclist_cb, &arr);
2008 }
2009 }
2010
2011 closedir(d);
2012
2013 if (!nl80211_get_noise(ifname, &noise))
2014 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
2015 e->noise = noise;
2016
2017 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
2018 return 0;
2019 }
2020
2021 return -1;
2022 }
2023
2024 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
2025 {
2026 int *dbm_max = arg;
2027 int ch_cur, ch_cmp, bands_remain, freqs_remain;
2028
2029 struct nlattr **attr = nl80211_parse(msg);
2030 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2031 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2032 struct nlattr *band, *freq;
2033
2034 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2035 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2036 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2037 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2038 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2039 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2040 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2041 };
2042
2043 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
2044 *dbm_max = -1;
2045
2046 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2047 {
2048 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
2049 nla_len(band), NULL);
2050
2051 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2052 {
2053 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2054 nla_data(freq), nla_len(freq), freq_policy);
2055
2056 ch_cmp = nl80211_freq2channel(nla_get_u32(
2057 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
2058
2059 if ((!ch_cur || (ch_cmp == ch_cur)) &&
2060 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
2061 {
2062 *dbm_max = (int)(0.01 * nla_get_u32(
2063 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
2064
2065 break;
2066 }
2067 }
2068 }
2069
2070 return NL_SKIP;
2071 }
2072
2073 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
2074 {
2075 int err, ch_cur;
2076 int dbm_max = -1, dbm_cur, dbm_cnt;
2077 struct nl80211_msg_conveyor *req;
2078 struct iwinfo_txpwrlist_entry entry;
2079
2080 if (nl80211_get_channel(ifname, &ch_cur))
2081 ch_cur = 0;
2082
2083 /* initialize the value pointer with channel for callback */
2084 dbm_max = ch_cur;
2085
2086 err = nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2087 nl80211_get_txpwrlist_cb, &dbm_max);
2088
2089 if (!err)
2090 {
2091 for (dbm_cur = 0, dbm_cnt = 0;
2092 dbm_cur < dbm_max;
2093 dbm_cur++, dbm_cnt++)
2094 {
2095 entry.dbm = dbm_cur;
2096 entry.mw = iwinfo_dbm2mw(dbm_cur);
2097
2098 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2099 }
2100
2101 entry.dbm = dbm_max;
2102 entry.mw = iwinfo_dbm2mw(dbm_max);
2103
2104 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2105 dbm_cnt++;
2106
2107 *len = dbm_cnt * sizeof(entry);
2108 return 0;
2109 }
2110
2111 return -1;
2112 }
2113
2114 static void nl80211_get_scancrypto(const char *spec,
2115 struct iwinfo_crypto_entry *c)
2116 {
2117 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
2118 {
2119 c->enabled = 1;
2120
2121 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
2122 c->wpa_version = 3;
2123
2124 else if (strstr(spec, "WPA2"))
2125 c->wpa_version = 2;
2126
2127 else if (strstr(spec, "WPA"))
2128 c->wpa_version = 1;
2129
2130 else if (strstr(spec, "WEP"))
2131 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2132
2133
2134 if (strstr(spec, "PSK"))
2135 c->auth_suites |= IWINFO_KMGMT_PSK;
2136
2137 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
2138 c->auth_suites |= IWINFO_KMGMT_8021x;
2139
2140 if (strstr(spec, "WPA-NONE"))
2141 c->auth_suites |= IWINFO_KMGMT_NONE;
2142
2143
2144 if (strstr(spec, "TKIP"))
2145 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
2146
2147 if (strstr(spec, "CCMP"))
2148 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
2149
2150 if (strstr(spec, "WEP-40"))
2151 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
2152
2153 if (strstr(spec, "WEP-104"))
2154 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
2155
2156 c->group_ciphers = c->pair_ciphers;
2157 }
2158 else
2159 {
2160 c->enabled = 0;
2161 }
2162 }
2163
2164
2165 struct nl80211_scanlist {
2166 struct iwinfo_scanlist_entry *e;
2167 int len;
2168 };
2169
2170
2171 static void nl80211_get_scanlist_ie(struct nlattr **bss,
2172 struct iwinfo_scanlist_entry *e)
2173 {
2174 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2175 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2176 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
2177 int len;
2178
2179 while (ielen >= 2 && ielen >= ie[1])
2180 {
2181 switch (ie[0])
2182 {
2183 case 0: /* SSID */
2184 case 114: /* Mesh ID */
2185 if (e->ssid[0] == 0) {
2186 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
2187 memcpy(e->ssid, ie + 2, len);
2188 e->ssid[len] = 0;
2189 }
2190 break;
2191
2192 case 48: /* RSN */
2193 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
2194 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
2195 break;
2196
2197 case 221: /* Vendor */
2198 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
2199 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
2200 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
2201 break;
2202 }
2203
2204 ielen -= ie[1] + 2;
2205 ie += ie[1] + 2;
2206 }
2207 }
2208
2209 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
2210 {
2211 int8_t rssi;
2212 uint16_t caps;
2213
2214 struct nl80211_scanlist *sl = arg;
2215 struct nlattr **tb = nl80211_parse(msg);
2216 struct nlattr *bss[NL80211_BSS_MAX + 1];
2217
2218 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2219 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2220 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2221 [NL80211_BSS_BSSID] = { 0 },
2222 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2223 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2224 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
2225 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2226 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2227 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2228 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2229 [NL80211_BSS_BEACON_IES] = { 0 },
2230 };
2231
2232 if (!tb[NL80211_ATTR_BSS] ||
2233 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2234 bss_policy) ||
2235 !bss[NL80211_BSS_BSSID])
2236 {
2237 return NL_SKIP;
2238 }
2239
2240 if (bss[NL80211_BSS_CAPABILITY])
2241 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2242 else
2243 caps = 0;
2244
2245 memset(sl->e, 0, sizeof(*sl->e));
2246 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
2247
2248 if (caps & (1<<1))
2249 sl->e->mode = IWINFO_OPMODE_ADHOC;
2250 else if (caps & (1<<0))
2251 sl->e->mode = IWINFO_OPMODE_MASTER;
2252 else
2253 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
2254
2255 if (caps & (1<<4))
2256 sl->e->crypto.enabled = 1;
2257
2258 if (bss[NL80211_BSS_FREQUENCY])
2259 sl->e->channel = nl80211_freq2channel(nla_get_u32(
2260 bss[NL80211_BSS_FREQUENCY]));
2261
2262 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
2263 nl80211_get_scanlist_ie(bss, sl->e);
2264
2265 if (bss[NL80211_BSS_SIGNAL_MBM])
2266 {
2267 sl->e->signal =
2268 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
2269
2270 rssi = sl->e->signal - 0x100;
2271
2272 if (rssi < -110)
2273 rssi = -110;
2274 else if (rssi > -40)
2275 rssi = -40;
2276
2277 sl->e->quality = (rssi + 110);
2278 sl->e->quality_max = 70;
2279 }
2280
2281 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
2282 {
2283 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2284 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2285 }
2286
2287 sl->e++;
2288 sl->len++;
2289
2290 return NL_SKIP;
2291 }
2292
2293 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
2294 {
2295 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
2296
2297 if (nl80211_request(ifname, NL80211_CMD_TRIGGER_SCAN, 0, NULL, NULL))
2298 goto out;
2299
2300 if (nl80211_wait("nl80211", "scan",
2301 NL80211_CMD_NEW_SCAN_RESULTS, NL80211_CMD_SCAN_ABORTED))
2302 goto out;
2303
2304 if (nl80211_request(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
2305 nl80211_get_scanlist_cb, &sl))
2306 goto out;
2307
2308 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
2309 return 0;
2310
2311 out:
2312 *len = 0;
2313 return -1;
2314 }
2315
2316 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
2317 {
2318 #define hex(x) \
2319 (((x) >= 'a') ? ((x) - 'a' + 10) : \
2320 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0')))
2321
2322 int len = 0;
2323
2324 while (*in)
2325 {
2326 if (len + 1 >= outlen)
2327 break;
2328
2329 switch (*in)
2330 {
2331 case '\\':
2332 in++;
2333 switch (*in)
2334 {
2335 case 'n':
2336 out[len++] = '\n'; in++;
2337 break;
2338
2339 case 'r':
2340 out[len++] = '\r'; in++;
2341 break;
2342
2343 case 't':
2344 out[len++] = '\t'; in++;
2345 break;
2346
2347 case 'e':
2348 out[len++] = '\033'; in++;
2349 break;
2350
2351 case 'x':
2352 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
2353 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
2354 in += 3;
2355 break;
2356
2357 default:
2358 out[len++] = *in++;
2359 break;
2360 }
2361 break;
2362
2363 default:
2364 out[len++] = *in++;
2365 break;
2366 }
2367 }
2368
2369 if (outlen > len)
2370 out[len] = '\0';
2371
2372 return len;
2373 }
2374
2375 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len)
2376 {
2377 int sock, qmax, rssi, tries, count = -1, ready = 0;
2378 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096];
2379 struct sockaddr_un local = { 0 };
2380 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
2381
2382 sock = nl80211_wpactl_connect(ifname, &local);
2383
2384 if (sock < 0)
2385 return sock;
2386
2387 send(sock, "ATTACH", 6, 0);
2388 send(sock, "SCAN", 4, 0);
2389
2390 /*
2391 * wait for scan results:
2392 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan
2393 * 72 channels at most. We'll also receive two "OK" messages acknowledging
2394 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra
2395 * time to process the results, so try 72 + 2 + 1 times.
2396 */
2397 for (tries = 0; tries < 75; tries++)
2398 {
2399 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0)
2400 continue;
2401
2402 /* got an event notification */
2403 if (reply[0] == '<')
2404 {
2405 /* scan results are ready */
2406 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS"))
2407 {
2408 /* send "SCAN_RESULTS" command */
2409 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12);
2410 break;
2411 }
2412
2413 /* is another unrelated event, retry */
2414 tries--;
2415 }
2416
2417 /* got a failure reply */
2418 else if (!strcmp(reply, "FAIL-BUSY\n"))
2419 {
2420 break;
2421 }
2422 }
2423
2424 /* receive and parse scan results if the wait above didn't time out */
2425 while (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
2426 {
2427 /* received an event notification, receive again */
2428 if (reply[0] == '<')
2429 continue;
2430
2431 nl80211_get_quality_max(ifname, &qmax);
2432
2433 for (line = strtok_r(reply, "\n", &pos);
2434 line != NULL;
2435 line = strtok_r(NULL, "\n", &pos))
2436 {
2437 /* skip header line */
2438 if (count < 0)
2439 {
2440 count++;
2441 continue;
2442 }
2443
2444 bssid = strtok(line, "\t");
2445 freq = strtok(NULL, "\t");
2446 signal = strtok(NULL, "\t");
2447 flags = strtok(NULL, "\t");
2448 ssid = strtok(NULL, "\n");
2449
2450 if (!bssid || !freq || !signal || !flags || !ssid)
2451 continue;
2452
2453 /* BSSID */
2454 e->mac[0] = strtol(&bssid[0], NULL, 16);
2455 e->mac[1] = strtol(&bssid[3], NULL, 16);
2456 e->mac[2] = strtol(&bssid[6], NULL, 16);
2457 e->mac[3] = strtol(&bssid[9], NULL, 16);
2458 e->mac[4] = strtol(&bssid[12], NULL, 16);
2459 e->mac[5] = strtol(&bssid[15], NULL, 16);
2460
2461 /* SSID */
2462 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2463
2464 /* Mode */
2465 if (strstr(flags, "[MESH]"))
2466 e->mode = IWINFO_OPMODE_MESHPOINT;
2467 else if (strstr(flags, "[IBSS]"))
2468 e->mode = IWINFO_OPMODE_ADHOC;
2469 else
2470 e->mode = IWINFO_OPMODE_MASTER;
2471
2472 /* Channel */
2473 e->channel = nl80211_freq2channel(atoi(freq));
2474
2475 /* Signal */
2476 rssi = atoi(signal);
2477 e->signal = rssi;
2478
2479 /* Quality */
2480 if (rssi < 0)
2481 {
2482 /* The cfg80211 wext compat layer assumes a signal range
2483 * of -110 dBm to -40 dBm, the quality value is derived
2484 * by adding 110 to the signal level */
2485 if (rssi < -110)
2486 rssi = -110;
2487 else if (rssi > -40)
2488 rssi = -40;
2489
2490 e->quality = (rssi + 110);
2491 }
2492 else
2493 {
2494 e->quality = rssi;
2495 }
2496
2497 /* Max. Quality */
2498 e->quality_max = qmax;
2499
2500 /* Crypto */
2501 nl80211_get_scancrypto(flags, &e->crypto);
2502
2503 count++;
2504 e++;
2505 }
2506
2507 *len = count * sizeof(struct iwinfo_scanlist_entry);
2508 break;
2509 }
2510
2511 close(sock);
2512 unlink(local.sun_path);
2513
2514 return (count >= 0) ? 0 : -1;
2515 }
2516
2517 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
2518 {
2519 char *res;
2520 int rv, mode;
2521
2522 *len = 0;
2523
2524 /* Got a radioX pseudo interface, find some interface on it or create one */
2525 if (!strncmp(ifname, "radio", 5))
2526 {
2527 /* Reuse existing interface */
2528 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2529 {
2530 return nl80211_get_scanlist(res, buf, len);
2531 }
2532
2533 /* Need to spawn a temporary iface for scanning */
2534 else if ((res = nl80211_ifadd(ifname)) != NULL)
2535 {
2536 rv = nl80211_get_scanlist(res, buf, len);
2537 nl80211_ifdel(res);
2538 return rv;
2539 }
2540 }
2541
2542 /* WPA supplicant */
2543 if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
2544 {
2545 return 0;
2546 }
2547
2548 /* station / ad-hoc / monitor scan */
2549 else if (!nl80211_get_mode(ifname, &mode) &&
2550 (mode == IWINFO_OPMODE_ADHOC ||
2551 mode == IWINFO_OPMODE_MASTER ||
2552 mode == IWINFO_OPMODE_CLIENT ||
2553 mode == IWINFO_OPMODE_MONITOR) &&
2554 iwinfo_ifup(ifname))
2555 {
2556 return nl80211_get_scanlist_nl(ifname, buf, len);
2557 }
2558
2559 /* AP scan */
2560 else
2561 {
2562 /* Got a temp interface, don't create yet another one */
2563 if (!strncmp(ifname, "tmp.", 4))
2564 {
2565 if (!iwinfo_ifup(ifname))
2566 return -1;
2567
2568 rv = nl80211_get_scanlist_nl(ifname, buf, len);
2569 iwinfo_ifdown(ifname);
2570 return rv;
2571 }
2572
2573 /* Spawn a new scan interface */
2574 else
2575 {
2576 if (!(res = nl80211_ifadd(ifname)))
2577 return -1;
2578
2579 iwinfo_ifmac(res);
2580
2581 /* if we can take the new interface up, the driver supports an
2582 * additional interface and there's no need to tear down the ap */
2583 if (iwinfo_ifup(res))
2584 {
2585 rv = nl80211_get_scanlist_nl(res, buf, len);
2586 iwinfo_ifdown(res);
2587 }
2588
2589 /* driver cannot create secondary interface, take down ap
2590 * during scan */
2591 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2592 {
2593 rv = nl80211_get_scanlist_nl(res, buf, len);
2594 iwinfo_ifdown(res);
2595 iwinfo_ifup(ifname);
2596 nl80211_hostapd_hup(ifname);
2597 }
2598
2599 nl80211_ifdel(res);
2600 return rv;
2601 }
2602 }
2603
2604 return -1;
2605 }
2606
2607 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2608 {
2609 int bands_remain, freqs_remain;
2610
2611 struct nl80211_array_buf *arr = arg;
2612 struct iwinfo_freqlist_entry *e;
2613
2614 struct nlattr **attr = nl80211_parse(msg);
2615 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2616 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2617 struct nlattr *band, *freq;
2618
2619 e = arr->buf;
2620 e += arr->count;
2621
2622 if (attr[NL80211_ATTR_WIPHY_BANDS]) {
2623 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2624 {
2625 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2626 nla_data(band), nla_len(band), NULL);
2627
2628 if (bands[NL80211_BAND_ATTR_FREQS]) {
2629 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2630 {
2631 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2632 nla_data(freq), nla_len(freq), NULL);
2633
2634 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2635 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2636 continue;
2637
2638 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2639 e->channel = nl80211_freq2channel(e->mhz);
2640
2641 e->restricted = (
2642 freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
2643 !freqs[NL80211_FREQUENCY_ATTR_RADAR]
2644 ) ? 1 : 0;
2645
2646 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_MINUS])
2647 e->flags |= IWINFO_FREQ_NO_HT40MINUS;
2648 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_PLUS])
2649 e->flags |= IWINFO_FREQ_NO_HT40PLUS;
2650 if (freqs[NL80211_FREQUENCY_ATTR_NO_80MHZ])
2651 e->flags |= IWINFO_FREQ_NO_80MHZ;
2652 if (freqs[NL80211_FREQUENCY_ATTR_NO_160MHZ])
2653 e->flags |= IWINFO_FREQ_NO_160MHZ;
2654 if (freqs[NL80211_FREQUENCY_ATTR_NO_20MHZ])
2655 e->flags |= IWINFO_FREQ_NO_20MHZ;
2656 if (freqs[NL80211_FREQUENCY_ATTR_NO_10MHZ])
2657 e->flags |= IWINFO_FREQ_NO_10MHZ;
2658
2659 e++;
2660 arr->count++;
2661 }
2662 }
2663 }
2664 }
2665
2666 return NL_SKIP;
2667 }
2668
2669 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2670 {
2671 struct nl80211_msg_conveyor *cv;
2672 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2673 uint32_t features = nl80211_get_protocol_features(ifname);
2674 int flags;
2675
2676 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
2677 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
2678 if (!cv)
2679 goto out;
2680
2681 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
2682 if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr))
2683 goto out;
2684
2685 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2686 return 0;
2687
2688 nla_put_failure:
2689 nl80211_free(cv);
2690 out:
2691 *len = 0;
2692 return -1;
2693 }
2694
2695 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2696 {
2697 char *buf = arg;
2698 struct nlattr **attr = nl80211_parse(msg);
2699
2700 if (attr[NL80211_ATTR_REG_ALPHA2])
2701 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2702 else
2703 buf[0] = 0;
2704
2705 return NL_SKIP;
2706 }
2707
2708 static int nl80211_get_country(const char *ifname, char *buf)
2709 {
2710 if (nl80211_request(ifname, NL80211_CMD_GET_REG, 0,
2711 nl80211_get_country_cb, buf))
2712 return -1;
2713
2714 return 0;
2715 }
2716
2717 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2718 {
2719 int count;
2720 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2721 const struct iwinfo_iso3166_label *l;
2722
2723 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2724 {
2725 e->iso3166 = l->iso3166;
2726 e->ccode[0] = (l->iso3166 / 256);
2727 e->ccode[1] = (l->iso3166 % 256);
2728 e->ccode[2] = 0;
2729 }
2730
2731 *len = (count * sizeof(struct iwinfo_country_entry));
2732 return 0;
2733 }
2734
2735
2736 struct nl80211_modes
2737 {
2738 bool ok;
2739 uint32_t hw;
2740 uint32_t ht;
2741 };
2742
2743 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
2744 {
2745 struct nl80211_modes *m = arg;
2746 int bands_remain, freqs_remain;
2747 uint16_t caps = 0;
2748 uint32_t vht_caps = 0;
2749 struct nlattr **attr = nl80211_parse(msg);
2750 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2751 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2752 struct nlattr *band, *freq;
2753
2754 if (attr[NL80211_ATTR_WIPHY_BANDS])
2755 {
2756 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2757 {
2758 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2759 nla_data(band), nla_len(band), NULL);
2760
2761 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2762 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2763
2764 /* Treat any nonzero capability as 11n */
2765 if (caps > 0)
2766 {
2767 m->hw |= IWINFO_80211_N;
2768 m->ht |= IWINFO_HTMODE_HT20;
2769
2770 if (caps & (1 << 1))
2771 m->ht |= IWINFO_HTMODE_HT40;
2772 }
2773
2774 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2775 freqs_remain)
2776 {
2777 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2778 nla_data(freq), nla_len(freq), NULL);
2779
2780 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2781 continue;
2782
2783 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2784 {
2785 m->hw |= IWINFO_80211_B;
2786 m->hw |= IWINFO_80211_G;
2787 }
2788 else if (bands[NL80211_BAND_ATTR_VHT_CAPA])
2789 {
2790 vht_caps = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
2791
2792 /* Treat any nonzero capability as 11ac */
2793 if (vht_caps > 0)
2794 {
2795 m->hw |= IWINFO_80211_AC;
2796 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
2797
2798 switch ((vht_caps >> 2) & 3)
2799 {
2800 case 2:
2801 m->ht |= IWINFO_HTMODE_VHT80_80;
2802 /* fall through */
2803
2804 case 1:
2805 m->ht |= IWINFO_HTMODE_VHT160;
2806 }
2807 }
2808 }
2809 else if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) >= 56160)
2810 {
2811 m->hw |= IWINFO_80211_AD;
2812 }
2813 else if (!(m->hw & IWINFO_80211_AC))
2814 {
2815 m->hw |= IWINFO_80211_A;
2816 }
2817 }
2818 }
2819
2820 m->ok = 1;
2821 }
2822
2823 return NL_SKIP;
2824 }
2825
2826 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
2827 {
2828 struct nl80211_modes m = { 0 };
2829
2830 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2831 nl80211_get_modelist_cb, &m))
2832 goto out;
2833
2834 if (!m.ok)
2835 goto out;
2836
2837 *buf = m.hw;
2838 return 0;
2839
2840 out:
2841 *buf = 0;
2842 return -1;
2843 }
2844
2845 static int nl80211_get_htmodelist(const char *ifname, int *buf)
2846 {
2847 struct nl80211_modes m = { 0 };
2848
2849 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2850 nl80211_get_modelist_cb, &m))
2851 goto out;
2852
2853 if (!m.ok)
2854 goto out;
2855
2856 *buf = m.ht;
2857 return 0;
2858
2859 out:
2860 *buf = 0;
2861 return -1;
2862 }
2863
2864
2865 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
2866 {
2867 struct nlattr **attr = nl80211_parse(msg);
2868 struct nlattr *comb;
2869 int *ret = arg;
2870 int comb_rem, limit_rem, mode_rem;
2871
2872 *ret = 0;
2873 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
2874 return NL_SKIP;
2875
2876 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
2877 {
2878 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
2879 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
2880 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
2881 };
2882 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1];
2883 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
2884 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
2885 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
2886 };
2887 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1];
2888 struct nlattr *limit;
2889
2890 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy);
2891
2892 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
2893 continue;
2894
2895 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
2896 {
2897 struct nlattr *mode;
2898
2899 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
2900
2901 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
2902 !tb_limit[NL80211_IFACE_LIMIT_MAX])
2903 continue;
2904
2905 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
2906 continue;
2907
2908 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
2909 if (nla_type(mode) == NL80211_IFTYPE_AP)
2910 *ret = 1;
2911 }
2912 }
2913 }
2914
2915 return NL_SKIP;
2916 }
2917
2918 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
2919 {
2920 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2921 nl80211_get_ifcomb_cb, buf))
2922 return -1;
2923
2924 return 0;
2925 }
2926
2927 static int nl80211_get_hardware_id(const char *ifname, char *buf)
2928 {
2929 struct iwinfo_hardware_id *id = (struct iwinfo_hardware_id *)buf;
2930 char *phy, num[8], path[PATH_MAX];
2931 int i;
2932
2933 struct { const char *path; uint16_t *dest; } lookup[] = {
2934 { "vendor", &id->vendor_id },
2935 { "device", &id->device_id },
2936 { "subsystem_vendor", &id->subsystem_vendor_id },
2937 { "subsystem_device", &id->subsystem_device_id }
2938 };
2939
2940 memset(id, 0, sizeof(*id));
2941
2942 /* Try to determine the phy name from the given interface */
2943 phy = nl80211_ifname2phy(ifname);
2944
2945 for (i = 0; i < ARRAY_SIZE(lookup); i++)
2946 {
2947 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/%s",
2948 phy ? "ieee80211" : "net",
2949 phy ? phy : ifname, lookup[i].path);
2950
2951 if (nl80211_readstr(path, num, sizeof(num)) > 0)
2952 *lookup[i].dest = strtoul(num, NULL, 16);
2953 }
2954
2955 /* Failed to obtain hardware IDs, search board config */
2956 if (id->vendor_id == 0 || id->device_id == 0)
2957 return iwinfo_hardware_id_from_mtd(id);
2958
2959 return 0;
2960 }
2961
2962 static const struct iwinfo_hardware_entry *
2963 nl80211_get_hardware_entry(const char *ifname)
2964 {
2965 struct iwinfo_hardware_id id;
2966
2967 if (nl80211_get_hardware_id(ifname, (char *)&id))
2968 return NULL;
2969
2970 return iwinfo_hardware(&id);
2971 }
2972
2973 static int nl80211_get_hardware_name(const char *ifname, char *buf)
2974 {
2975 const struct iwinfo_hardware_entry *hw;
2976
2977 if (!(hw = nl80211_get_hardware_entry(ifname)))
2978 sprintf(buf, "Generic MAC80211");
2979 else
2980 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2981
2982 return 0;
2983 }
2984
2985 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
2986 {
2987 const struct iwinfo_hardware_entry *hw;
2988
2989 if (!(hw = nl80211_get_hardware_entry(ifname)))
2990 return -1;
2991
2992 *buf = hw->txpower_offset;
2993 return 0;
2994 }
2995
2996 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
2997 {
2998 const struct iwinfo_hardware_entry *hw;
2999
3000 if (!(hw = nl80211_get_hardware_entry(ifname)))
3001 return -1;
3002
3003 *buf = hw->frequency_offset;
3004 return 0;
3005 }
3006
3007 static int nl80211_lookup_phyname(const char *section, char *buf)
3008 {
3009 int idx;
3010
3011 if ((idx = nl80211_phy_idx_from_uci(section)) < 0)
3012 return -1;
3013
3014 sprintf(buf, "phy%d", idx);
3015 return 0;
3016 }
3017
3018 const struct iwinfo_ops nl80211_ops = {
3019 .name = "nl80211",
3020 .probe = nl80211_probe,
3021 .channel = nl80211_get_channel,
3022 .frequency = nl80211_get_frequency,
3023 .frequency_offset = nl80211_get_frequency_offset,
3024 .txpower = nl80211_get_txpower,
3025 .txpower_offset = nl80211_get_txpower_offset,
3026 .bitrate = nl80211_get_bitrate,
3027 .signal = nl80211_get_signal,
3028 .noise = nl80211_get_noise,
3029 .quality = nl80211_get_quality,
3030 .quality_max = nl80211_get_quality_max,
3031 .mbssid_support = nl80211_get_mbssid_support,
3032 .hwmodelist = nl80211_get_hwmodelist,
3033 .htmodelist = nl80211_get_htmodelist,
3034 .mode = nl80211_get_mode,
3035 .ssid = nl80211_get_ssid,
3036 .bssid = nl80211_get_bssid,
3037 .country = nl80211_get_country,
3038 .hardware_id = nl80211_get_hardware_id,
3039 .hardware_name = nl80211_get_hardware_name,
3040 .encryption = nl80211_get_encryption,
3041 .phyname = nl80211_get_phyname,
3042 .assoclist = nl80211_get_assoclist,
3043 .txpwrlist = nl80211_get_txpwrlist,
3044 .scanlist = nl80211_get_scanlist,
3045 .freqlist = nl80211_get_freqlist,
3046 .countrylist = nl80211_get_countrylist,
3047 .survey = nl80211_get_survey,
3048 .lookup_phy = nl80211_lookup_phyname,
3049 .close = nl80211_close
3050 };
Library for accessing wireless device drivers