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nl80211: request split information about frequencies
[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 (gnlh->cmd == cv->wait)
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, int cmd)
525 {
526 struct nl80211_event_conveyor cv = { .wait = cmd };
527 struct nl_cb *cb;
528 int err = 0;
529
530 if (nl80211_subscribe(family, group))
531 return -ENOENT;
532
533 cb = nl_cb_alloc(NL_CB_DEFAULT);
534
535 if (!cb)
536 return -ENOMEM;
537
538 nl_cb_err(cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
539 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
540 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
541
542 while (!cv.recv && !err)
543 nl_recvmsgs(nls->nl_sock, cb);
544
545 nl_cb_put(cb);
546
547 return err;
548 }
549
550
551 static int nl80211_freq2channel(int freq)
552 {
553 if (freq == 2484)
554 return 14;
555 else if (freq < 2484)
556 return (freq - 2407) / 5;
557 else if (freq >= 4910 && freq <= 4980)
558 return (freq - 4000) / 5;
559 else
560 return (freq - 5000) / 5;
561 }
562
563 static int nl80211_channel2freq(int channel, const char *band)
564 {
565 if (!band || band[0] != 'a')
566 {
567 if (channel == 14)
568 return 2484;
569 else if (channel < 14)
570 return (channel * 5) + 2407;
571 }
572 else
573 {
574 if (channel >= 182 && channel <= 196)
575 return (channel * 5) + 4000;
576 else
577 return (channel * 5) + 5000;
578 }
579
580 return 0;
581 }
582
583 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
584 {
585 char *buf = arg;
586 struct nlattr **attr = nl80211_parse(msg);
587
588 if (attr[NL80211_ATTR_WIPHY_NAME])
589 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
590 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
591 else
592 buf[0] = 0;
593
594 return NL_SKIP;
595 }
596
597 static char * nl80211_ifname2phy(const char *ifname)
598 {
599 static char phy[32] = { 0 };
600
601 memset(phy, 0, sizeof(phy));
602
603 nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
604 nl80211_ifname2phy_cb, phy);
605
606 return phy[0] ? phy : NULL;
607 }
608
609 static char * nl80211_phy2ifname(const char *ifname)
610 {
611 int ifidx = -1, cifidx = -1, phyidx = -1;
612 char buffer[64];
613 static char nif[IFNAMSIZ] = { 0 };
614
615 DIR *d;
616 struct dirent *e;
617
618 /* Only accept phy name of the form phy%d or radio%d */
619 if (!ifname)
620 return NULL;
621 else if (!strncmp(ifname, "phy", 3))
622 phyidx = atoi(&ifname[3]);
623 else if (!strncmp(ifname, "radio", 5))
624 phyidx = nl80211_phy_idx_from_uci(ifname);
625 else
626 return NULL;
627
628 memset(nif, 0, sizeof(nif));
629
630 if (phyidx > -1)
631 {
632 if ((d = opendir("/sys/class/net")) != NULL)
633 {
634 while ((e = readdir(d)) != NULL)
635 {
636 snprintf(buffer, sizeof(buffer),
637 "/sys/class/net/%s/phy80211/index", e->d_name);
638
639 if (nl80211_readint(buffer) == phyidx)
640 {
641 snprintf(buffer, sizeof(buffer),
642 "/sys/class/net/%s/ifindex", e->d_name);
643
644 if ((cifidx = nl80211_readint(buffer)) >= 0 &&
645 ((ifidx < 0) || (cifidx < ifidx)))
646 {
647 ifidx = cifidx;
648 strncpy(nif, e->d_name, sizeof(nif) - 1);
649 }
650 }
651 }
652
653 closedir(d);
654 }
655 }
656
657 return nif[0] ? nif : NULL;
658 }
659
660 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
661 {
662 int *mode = arg;
663 struct nlattr **tb = nl80211_parse(msg);
664 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
665 IWINFO_OPMODE_UNKNOWN, /* unspecified */
666 IWINFO_OPMODE_ADHOC, /* IBSS */
667 IWINFO_OPMODE_CLIENT, /* managed */
668 IWINFO_OPMODE_MASTER, /* AP */
669 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
670 IWINFO_OPMODE_WDS, /* WDS */
671 IWINFO_OPMODE_MONITOR, /* monitor */
672 IWINFO_OPMODE_MESHPOINT, /* mesh point */
673 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
674 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
675 };
676
677 if (tb[NL80211_ATTR_IFTYPE])
678 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
679
680 return NL_SKIP;
681 }
682
683
684 static int nl80211_get_mode(const char *ifname, int *buf)
685 {
686 char *res;
687
688 *buf = IWINFO_OPMODE_UNKNOWN;
689
690 res = nl80211_phy2ifname(ifname);
691
692 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
693 nl80211_get_mode_cb, buf);
694
695 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
696 }
697
698 static int __nl80211_hostapd_query(const char *ifname, ...)
699 {
700 va_list ap, ap_cur;
701 char *phy, *search, *dest, *key, *val, buf[128];
702 int len, mode, found = 0, match = 1;
703 FILE *fp;
704
705 if (nl80211_get_mode(ifname, &mode))
706 return 0;
707
708 if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN)
709 return 0;
710
711 phy = nl80211_ifname2phy(ifname);
712
713 if (!phy)
714 return 0;
715
716 snprintf(buf, sizeof(buf), "/var/run/hostapd-%s.conf", phy);
717 fp = fopen(buf, "r");
718
719 if (!fp)
720 return 0;
721
722 va_start(ap, ifname);
723
724 /* clear all destination buffers */
725 va_copy(ap_cur, ap);
726
727 while ((search = va_arg(ap_cur, char *)) != NULL)
728 {
729 dest = va_arg(ap_cur, char *);
730 len = va_arg(ap_cur, int);
731
732 memset(dest, 0, len);
733 }
734
735 va_end(ap_cur);
736
737 /* iterate applicable lines and copy found values into dest buffers */
738 while (fgets(buf, sizeof(buf), fp))
739 {
740 key = strtok(buf, " =\t\n");
741 val = strtok(NULL, "\n");
742
743 if (!key || !val || !*key || *key == '#')
744 continue;
745
746 if (!strcmp(key, "interface") || !strcmp(key, "bss"))
747 match = !strcmp(ifname, val);
748
749 if (!match)
750 continue;
751
752 va_copy(ap_cur, ap);
753
754 while ((search = va_arg(ap_cur, char *)) != NULL)
755 {
756 dest = va_arg(ap_cur, char *);
757 len = va_arg(ap_cur, int);
758
759 if (!strcmp(search, key))
760 {
761 strncpy(dest, val, len - 1);
762 found++;
763 break;
764 }
765 }
766
767 va_end(ap_cur);
768 }
769
770 fclose(fp);
771
772 va_end(ap);
773
774 return found;
775 }
776
777 #define nl80211_hostapd_query(ifname, ...) \
778 __nl80211_hostapd_query(ifname, ##__VA_ARGS__, NULL)
779
780
781 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
782 {
783 fd_set rfds;
784 struct timeval tv = { 0, 256000 };
785
786 FD_ZERO(&rfds);
787 FD_SET(sock, &rfds);
788
789 memset(buf, 0, blen);
790
791 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
792 return -1;
793
794 if (!FD_ISSET(sock, &rfds))
795 return -1;
796
797 return recv(sock, buf, blen - 1, 0);
798 }
799
800 static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local)
801 {
802 struct sockaddr_un remote = { 0 };
803 size_t remote_length, local_length;
804
805 int sock = socket(PF_UNIX, SOCK_DGRAM, 0);
806 if (sock < 0)
807 return sock;
808
809 remote.sun_family = AF_UNIX;
810 remote_length = sizeof(remote.sun_family) +
811 sprintf(remote.sun_path, "/var/run/wpa_supplicant-%s/%s",
812 ifname, ifname);
813
814 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
815 {
816 close(sock);
817 return -1;
818 }
819
820 if (connect(sock, (struct sockaddr *)&remote, remote_length))
821 {
822 remote_length = sizeof(remote.sun_family) +
823 sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname);
824
825 if (connect(sock, (struct sockaddr *)&remote, remote_length))
826 {
827 close(sock);
828 return -1;
829 }
830 }
831
832 local->sun_family = AF_UNIX;
833 local_length = sizeof(local->sun_family) +
834 sprintf(local->sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
835
836 if (bind(sock, (struct sockaddr *)local, local_length) < 0)
837 {
838 close(sock);
839 return -1;
840 }
841
842 return sock;
843 }
844
845 static int __nl80211_wpactl_query(const char *ifname, ...)
846 {
847 va_list ap, ap_cur;
848 struct sockaddr_un local = { 0 };
849 int len, mode, found = 0, sock = -1;
850 char *search, *dest, *key, *val, *line, *pos, buf[512];
851
852 if (nl80211_get_mode(ifname, &mode))
853 return 0;
854
855 if (mode != IWINFO_OPMODE_CLIENT && mode != IWINFO_OPMODE_ADHOC)
856 return 0;
857
858 sock = nl80211_wpactl_connect(ifname, &local);
859
860 if (sock < 0)
861 return 0;
862
863 va_start(ap, ifname);
864
865 /* clear all destination buffers */
866 va_copy(ap_cur, ap);
867
868 while ((search = va_arg(ap_cur, char *)) != NULL)
869 {
870 dest = va_arg(ap_cur, char *);
871 len = va_arg(ap_cur, int);
872
873 memset(dest, 0, len);
874 }
875
876 va_end(ap_cur);
877
878 send(sock, "STATUS", 6, 0);
879
880 while (true)
881 {
882 if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0)
883 break;
884
885 if (buf[0] == '<')
886 continue;
887
888 for (line = strtok_r(buf, "\n", &pos);
889 line != NULL;
890 line = strtok_r(NULL, "\n", &pos))
891 {
892 key = strtok(line, "=");
893 val = strtok(NULL, "\n");
894
895 if (!key || !val)
896 continue;
897
898 va_copy(ap_cur, ap);
899
900 while ((search = va_arg(ap_cur, char *)) != NULL)
901 {
902 dest = va_arg(ap_cur, char *);
903 len = va_arg(ap_cur, int);
904
905 if (!strcmp(search, key))
906 {
907 strncpy(dest, val, len - 1);
908 found++;
909 break;
910 }
911 }
912
913 va_end(ap_cur);
914 }
915
916 break;
917 }
918
919 va_end(ap);
920
921 close(sock);
922 unlink(local.sun_path);
923
924 return found;
925 }
926
927 #define nl80211_wpactl_query(ifname, ...) \
928 __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL)
929
930
931 static char * nl80211_ifadd(const char *ifname)
932 {
933 char path[PATH_MAX];
934 static char nif[IFNAMSIZ] = { 0 };
935 struct nl80211_msg_conveyor *req;
936 FILE *sysfs;
937
938 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
939 if (req)
940 {
941 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
942
943 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
944 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
945
946 nl80211_send(req, NULL, NULL);
947
948 snprintf(path, sizeof(path) - 1,
949 "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif);
950
951 if ((sysfs = fopen(path, "w")) != NULL)
952 {
953 fwrite("0\n", 1, 2, sysfs);
954 fclose(sysfs);
955 }
956
957 return nif;
958
959 nla_put_failure:
960 nl80211_free(req);
961 }
962
963 return NULL;
964 }
965
966 static void nl80211_ifdel(const char *ifname)
967 {
968 struct nl80211_msg_conveyor *req;
969 int err;
970
971 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
972 if (req)
973 {
974 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
975
976 nl80211_send(req, NULL, NULL);
977 return;
978
979 nla_put_failure:
980 nl80211_free(req);
981 }
982 }
983
984 static void nl80211_hostapd_hup(const char *ifname)
985 {
986 int fd, pid = 0;
987 char buf[32];
988 char *phy = nl80211_ifname2phy(ifname);
989
990 if (phy)
991 {
992 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
993 if ((fd = open(buf, O_RDONLY)) >= 0)
994 {
995 if (read(fd, buf, sizeof(buf)) > 0)
996 pid = atoi(buf);
997
998 close(fd);
999 }
1000
1001 if (pid > 0)
1002 kill(pid, 1);
1003 }
1004 }
1005
1006
1007 static int nl80211_probe(const char *ifname)
1008 {
1009 return !!nl80211_ifname2phy(ifname);
1010 }
1011
1012 struct nl80211_ssid_bssid {
1013 unsigned char *ssid;
1014 unsigned char bssid[7];
1015 };
1016
1017 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
1018 {
1019 int ielen;
1020 unsigned char *ie;
1021 struct nl80211_ssid_bssid *sb = arg;
1022 struct nlattr **tb = nl80211_parse(msg);
1023 struct nlattr *bss[NL80211_BSS_MAX + 1];
1024
1025 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1026 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
1027 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1028 };
1029
1030 if (!tb[NL80211_ATTR_BSS] ||
1031 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1032 bss_policy) ||
1033 !bss[NL80211_BSS_BSSID] ||
1034 !bss[NL80211_BSS_STATUS] ||
1035 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
1036 {
1037 return NL_SKIP;
1038 }
1039
1040 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
1041 {
1042 case NL80211_BSS_STATUS_ASSOCIATED:
1043 case NL80211_BSS_STATUS_AUTHENTICATED:
1044 case NL80211_BSS_STATUS_IBSS_JOINED:
1045
1046 if (sb->ssid)
1047 {
1048 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1049 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1050
1051 while (ielen >= 2 && ielen >= ie[1])
1052 {
1053 if (ie[0] == 0)
1054 {
1055 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1056 return NL_SKIP;
1057 }
1058
1059 ielen -= ie[1] + 2;
1060 ie += ie[1] + 2;
1061 }
1062 }
1063 else
1064 {
1065 sb->bssid[0] = 1;
1066 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
1067 return NL_SKIP;
1068 }
1069
1070 default:
1071 return NL_SKIP;
1072 }
1073 }
1074
1075 static int nl80211_get_ssid(const char *ifname, char *buf)
1076 {
1077 char *res;
1078 struct nl80211_ssid_bssid sb = { .ssid = (unsigned char *)buf };
1079
1080 /* try to find ssid from scan dump results */
1081 res = nl80211_phy2ifname(ifname);
1082 sb.ssid[0] = 0;
1083
1084 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1085 nl80211_get_ssid_bssid_cb, &sb);
1086
1087 /* failed, try to find from hostapd info */
1088 if (sb.ssid[0] == 0)
1089 nl80211_hostapd_query(ifname, "ssid", sb.ssid,
1090 IWINFO_ESSID_MAX_SIZE + 1);
1091
1092 return (sb.ssid[0] == 0) ? -1 : 0;
1093 }
1094
1095 static int nl80211_get_bssid(const char *ifname, char *buf)
1096 {
1097 char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")];
1098 struct nl80211_ssid_bssid sb = { };
1099
1100 /* try to find bssid from scan dump results */
1101 res = nl80211_phy2ifname(ifname);
1102
1103 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1104 nl80211_get_ssid_bssid_cb, &sb);
1105
1106 /* failed, try to find mac from hostapd info */
1107 if ((sb.bssid[0] == 0) &&
1108 nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid)))
1109 {
1110 sb.bssid[0] = 1;
1111 sb.bssid[1] = strtol(&bssid[0], NULL, 16);
1112 sb.bssid[2] = strtol(&bssid[3], NULL, 16);
1113 sb.bssid[3] = strtol(&bssid[6], NULL, 16);
1114 sb.bssid[4] = strtol(&bssid[9], NULL, 16);
1115 sb.bssid[5] = strtol(&bssid[12], NULL, 16);
1116 sb.bssid[6] = strtol(&bssid[15], NULL, 16);
1117 }
1118
1119 if (sb.bssid[0])
1120 {
1121 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
1122 sb.bssid[1], sb.bssid[2], sb.bssid[3],
1123 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
1124
1125 return 0;
1126 }
1127
1128 return -1;
1129 }
1130
1131
1132 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
1133 {
1134 int *freq = arg;
1135 struct nlattr **attr = nl80211_parse(msg);
1136 struct nlattr *binfo[NL80211_BSS_MAX + 1];
1137
1138 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1139 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1140 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1141 };
1142
1143 if (attr[NL80211_ATTR_BSS] &&
1144 !nla_parse_nested(binfo, NL80211_BSS_MAX,
1145 attr[NL80211_ATTR_BSS], bss_policy))
1146 {
1147 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
1148 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
1149 }
1150
1151 return NL_SKIP;
1152 }
1153
1154 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
1155 {
1156 int *freq = arg;
1157 struct nlattr **tb = nl80211_parse(msg);
1158
1159 if (tb[NL80211_ATTR_WIPHY_FREQ])
1160 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
1161
1162 return NL_SKIP;
1163 }
1164
1165 static int nl80211_get_frequency(const char *ifname, int *buf)
1166 {
1167 char *res, channel[4], hwmode[2];
1168
1169 /* try to find frequency from interface info */
1170 res = nl80211_phy2ifname(ifname);
1171 *buf = 0;
1172
1173 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1174 nl80211_get_frequency_info_cb, buf);
1175
1176 /* failed, try to find frequency from hostapd info */
1177 if ((*buf == 0) &&
1178 nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode),
1179 "channel", channel, sizeof(channel)) == 2)
1180 {
1181 *buf = nl80211_channel2freq(atoi(channel), hwmode);
1182 }
1183
1184 /* failed, try to find frequency from scan results */
1185 if (*buf == 0)
1186 {
1187 res = nl80211_phy2ifname(ifname);
1188
1189 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1190 nl80211_get_frequency_scan_cb, buf);
1191 }
1192
1193 return (*buf == 0) ? -1 : 0;
1194 }
1195
1196 static int nl80211_get_channel(const char *ifname, int *buf)
1197 {
1198 if (!nl80211_get_frequency(ifname, buf))
1199 {
1200 *buf = nl80211_freq2channel(*buf);
1201 return 0;
1202 }
1203
1204 return -1;
1205 }
1206
1207 static int nl80211_get_txpower_cb(struct nl_msg *msg, void *arg)
1208 {
1209 int *buf = arg;
1210 struct nlattr **tb = nl80211_parse(msg);
1211
1212 if (tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL])
1213 *buf = iwinfo_mbm2dbm(nla_get_u32(tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL]));
1214
1215 return NL_SKIP;
1216 }
1217
1218 static int nl80211_get_txpower(const char *ifname, int *buf)
1219 {
1220 char *res;
1221
1222 res = nl80211_phy2ifname(ifname);
1223 *buf = 0;
1224
1225 if (nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1226 nl80211_get_txpower_cb, buf))
1227 return -1;
1228
1229 return 0;
1230 }
1231
1232
1233 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1234 {
1235 int8_t dbm;
1236 int16_t mbit;
1237 struct nl80211_rssi_rate *rr = arg;
1238 struct nlattr **attr = nl80211_parse(msg);
1239 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1240 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1241
1242 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1243 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1244 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1245 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1246 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1247 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1248 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1249 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1250 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1251 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1252 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1253 };
1254
1255 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1256 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1257 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1258 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1259 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1260 };
1261
1262 if (attr[NL80211_ATTR_STA_INFO])
1263 {
1264 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1265 attr[NL80211_ATTR_STA_INFO], stats_policy))
1266 {
1267 if (sinfo[NL80211_STA_INFO_SIGNAL])
1268 {
1269 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1270 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1271 }
1272
1273 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1274 {
1275 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1276 sinfo[NL80211_STA_INFO_TX_BITRATE],
1277 rate_policy))
1278 {
1279 if (rinfo[NL80211_RATE_INFO_BITRATE])
1280 {
1281 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1282 rr->rate = rr->rate
1283 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1284 }
1285 }
1286 }
1287 }
1288 }
1289
1290 return NL_SKIP;
1291 }
1292
1293 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1294 {
1295 DIR *d;
1296 struct dirent *de;
1297
1298 r->rssi = 0;
1299 r->rate = 0;
1300
1301 if ((d = opendir("/sys/class/net")) != NULL)
1302 {
1303 while ((de = readdir(d)) != NULL)
1304 {
1305 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1306 (!de->d_name[strlen(ifname)] ||
1307 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1308 {
1309 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
1310 NLM_F_DUMP, nl80211_fill_signal_cb, r);
1311 }
1312 }
1313
1314 closedir(d);
1315 }
1316 }
1317
1318 static int nl80211_get_bitrate(const char *ifname, int *buf)
1319 {
1320 struct nl80211_rssi_rate rr;
1321
1322 nl80211_fill_signal(ifname, &rr);
1323
1324 if (rr.rate)
1325 {
1326 *buf = (rr.rate * 100);
1327 return 0;
1328 }
1329
1330 return -1;
1331 }
1332
1333 static int nl80211_get_signal(const char *ifname, int *buf)
1334 {
1335 struct nl80211_rssi_rate rr;
1336
1337 nl80211_fill_signal(ifname, &rr);
1338
1339 if (rr.rssi)
1340 {
1341 *buf = rr.rssi;
1342 return 0;
1343 }
1344
1345 return -1;
1346 }
1347
1348 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1349 {
1350 int8_t *noise = arg;
1351 struct nlattr **tb = nl80211_parse(msg);
1352 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1353
1354 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1355 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1356 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1357 };
1358
1359 if (!tb[NL80211_ATTR_SURVEY_INFO])
1360 return NL_SKIP;
1361
1362 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1363 tb[NL80211_ATTR_SURVEY_INFO], sp))
1364 return NL_SKIP;
1365
1366 if (!si[NL80211_SURVEY_INFO_NOISE])
1367 return NL_SKIP;
1368
1369 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1370 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1371
1372 return NL_SKIP;
1373 }
1374
1375
1376 static int nl80211_get_noise(const char *ifname, int *buf)
1377 {
1378 int8_t noise = 0;
1379
1380 if (nl80211_request(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP,
1381 nl80211_get_noise_cb, &noise))
1382 goto out;
1383
1384 *buf = noise;
1385 return 0;
1386
1387 out:
1388 *buf = 0;
1389 return -1;
1390 }
1391
1392 static int nl80211_get_quality(const char *ifname, int *buf)
1393 {
1394 int signal;
1395
1396 if (!nl80211_get_signal(ifname, &signal))
1397 {
1398 /* A positive signal level is usually just a quality
1399 * value, pass through as-is */
1400 if (signal >= 0)
1401 {
1402 *buf = signal;
1403 }
1404
1405 /* The cfg80211 wext compat layer assumes a signal range
1406 * of -110 dBm to -40 dBm, the quality value is derived
1407 * by adding 110 to the signal level */
1408 else
1409 {
1410 if (signal < -110)
1411 signal = -110;
1412 else if (signal > -40)
1413 signal = -40;
1414
1415 *buf = (signal + 110);
1416 }
1417
1418 return 0;
1419 }
1420
1421 return -1;
1422 }
1423
1424 static int nl80211_get_quality_max(const char *ifname, int *buf)
1425 {
1426 /* The cfg80211 wext compat layer assumes a maximum
1427 * quality of 70 */
1428 *buf = 70;
1429
1430 return 0;
1431 }
1432
1433 static int nl80211_check_wepkey(const char *key)
1434 {
1435 if (key && *key)
1436 {
1437 switch (strlen(key))
1438 {
1439 case 5:
1440 case 10:
1441 return IWINFO_CIPHER_WEP40;
1442
1443 case 13:
1444 case 26:
1445 return IWINFO_CIPHER_WEP104;
1446 }
1447 }
1448
1449 return 0;
1450 }
1451
1452 static int nl80211_get_encryption(const char *ifname, char *buf)
1453 {
1454 char wpa[2], wpa_key_mgmt[16], wpa_pairwise[16], wpa_groupwise[16];
1455 char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27];
1456
1457 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1458
1459 /* WPA supplicant */
1460 if (nl80211_wpactl_query(ifname,
1461 "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise),
1462 "group_cipher", wpa_groupwise, sizeof(wpa_groupwise),
1463 "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt)))
1464 {
1465 /* WEP */
1466 if (!strcmp(wpa_key_mgmt, "NONE"))
1467 {
1468 if (strstr(wpa_pairwise, "WEP-40"))
1469 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1470 else if (strstr(wpa_pairwise, "WEP-104"))
1471 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1472
1473 if (strstr(wpa_groupwise, "WEP-40"))
1474 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1475 else if (strstr(wpa_groupwise, "WEP-104"))
1476 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1477
1478 c->enabled = !!(c->pair_ciphers | c->group_ciphers);
1479 c->auth_suites |= IWINFO_KMGMT_NONE;
1480 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1481 }
1482
1483 /* WPA */
1484 else if (strstr(wpa_key_mgmt, "WPA"))
1485 {
1486 if (strstr(wpa_pairwise, "TKIP"))
1487 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1488 else if (strstr(wpa_pairwise, "CCMP"))
1489 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1490 else if (strstr(wpa_pairwise, "NONE"))
1491 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1492 else if (strstr(wpa_pairwise, "WEP-40"))
1493 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1494 else if (strstr(wpa_pairwise, "WEP-104"))
1495 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1496
1497 if (strstr(wpa_groupwise, "TKIP"))
1498 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1499 else if (strstr(wpa_groupwise, "CCMP"))
1500 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1501 else if (strstr(wpa_groupwise, "NONE"))
1502 c->group_ciphers |= IWINFO_CIPHER_NONE;
1503 else if (strstr(wpa_groupwise, "WEP-40"))
1504 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1505 else if (strstr(wpa_groupwise, "WEP-104"))
1506 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1507
1508 if (strstr(wpa_key_mgmt, "WPA2"))
1509 c->wpa_version = 2;
1510 else if (strstr(wpa_key_mgmt, "WPA"))
1511 c->wpa_version = 1;
1512
1513 if (strstr(wpa_key_mgmt, "PSK"))
1514 c->auth_suites |= IWINFO_KMGMT_PSK;
1515 else if (strstr(wpa_key_mgmt, "EAP") ||
1516 strstr(wpa_key_mgmt, "802.1X"))
1517 c->auth_suites |= IWINFO_KMGMT_8021x;
1518 else if (strstr(wpa_key_mgmt, "NONE"))
1519 c->auth_suites |= IWINFO_KMGMT_NONE;
1520
1521 c->enabled = !!(c->wpa_version && c->auth_suites);
1522 }
1523
1524 return 0;
1525 }
1526
1527 /* Hostapd */
1528 else if (nl80211_hostapd_query(ifname,
1529 "wpa", wpa, sizeof(wpa),
1530 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1531 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise),
1532 "auth_algs", auth_algs, sizeof(auth_algs),
1533 "wep_key0", wep_key0, sizeof(wep_key0),
1534 "wep_key1", wep_key1, sizeof(wep_key1),
1535 "wep_key2", wep_key2, sizeof(wep_key2),
1536 "wep_key3", wep_key3, sizeof(wep_key3)))
1537 {
1538 c->wpa_version = wpa[0] ? atoi(wpa) : 0;
1539
1540 if (wpa_key_mgmt[0])
1541 {
1542 if (strstr(wpa_key_mgmt, "PSK"))
1543 c->auth_suites |= IWINFO_KMGMT_PSK;
1544
1545 if (strstr(wpa_key_mgmt, "EAP"))
1546 c->auth_suites |= IWINFO_KMGMT_8021x;
1547
1548 if (strstr(wpa_key_mgmt, "NONE"))
1549 c->auth_suites |= IWINFO_KMGMT_NONE;
1550 }
1551 else
1552 {
1553 c->auth_suites |= IWINFO_KMGMT_PSK;
1554 }
1555
1556 if (wpa_pairwise[0])
1557 {
1558 if (strstr(wpa_pairwise, "TKIP"))
1559 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1560
1561 if (strstr(wpa_pairwise, "CCMP"))
1562 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1563
1564 if (strstr(wpa_pairwise, "NONE"))
1565 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1566 }
1567
1568 if (auth_algs[0])
1569 {
1570 switch(atoi(auth_algs))
1571 {
1572 case 1:
1573 c->auth_algs |= IWINFO_AUTH_OPEN;
1574 break;
1575
1576 case 2:
1577 c->auth_algs |= IWINFO_AUTH_SHARED;
1578 break;
1579
1580 case 3:
1581 c->auth_algs |= IWINFO_AUTH_OPEN;
1582 c->auth_algs |= IWINFO_AUTH_SHARED;
1583 break;
1584 }
1585
1586 c->pair_ciphers |= nl80211_check_wepkey(wep_key0);
1587 c->pair_ciphers |= nl80211_check_wepkey(wep_key1);
1588 c->pair_ciphers |= nl80211_check_wepkey(wep_key2);
1589 c->pair_ciphers |= nl80211_check_wepkey(wep_key3);
1590 }
1591
1592 c->group_ciphers = c->pair_ciphers;
1593 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1594
1595 return 0;
1596 }
1597
1598 return -1;
1599 }
1600
1601 static int nl80211_get_phyname(const char *ifname, char *buf)
1602 {
1603 const char *name;
1604
1605 name = nl80211_ifname2phy(ifname);
1606
1607 if (name)
1608 {
1609 strcpy(buf, name);
1610 return 0;
1611 }
1612 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1613 {
1614 name = nl80211_ifname2phy(name);
1615
1616 if (name)
1617 {
1618 strcpy(buf, ifname);
1619 return 0;
1620 }
1621 }
1622
1623 return -1;
1624 }
1625
1626
1627 static void nl80211_parse_rateinfo(struct nlattr **ri,
1628 struct iwinfo_rate_entry *re)
1629 {
1630 if (ri[NL80211_RATE_INFO_BITRATE32])
1631 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100;
1632 else if (ri[NL80211_RATE_INFO_BITRATE])
1633 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100;
1634
1635 if (ri[NL80211_RATE_INFO_VHT_MCS])
1636 {
1637 re->is_vht = 1;
1638 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]);
1639
1640 if (ri[NL80211_RATE_INFO_VHT_NSS])
1641 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]);
1642 }
1643 else if (ri[NL80211_RATE_INFO_MCS])
1644 {
1645 re->is_ht = 1;
1646 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]);
1647 }
1648
1649 if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH])
1650 re->mhz = 5;
1651 else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH])
1652 re->mhz = 10;
1653 else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH])
1654 re->mhz = 40;
1655 else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH])
1656 re->mhz = 80;
1657 else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] ||
1658 ri[NL80211_RATE_INFO_160_MHZ_WIDTH])
1659 re->mhz = 160;
1660 else
1661 re->mhz = 20;
1662
1663 if (ri[NL80211_RATE_INFO_SHORT_GI])
1664 re->is_short_gi = 1;
1665
1666 re->is_40mhz = (re->mhz == 40);
1667 }
1668
1669 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1670 {
1671 struct nl80211_array_buf *arr = arg;
1672 struct iwinfo_assoclist_entry *e = arr->buf;
1673 struct nlattr **attr = nl80211_parse(msg);
1674 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1675 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1676 struct nl80211_sta_flag_update *sta_flags;
1677
1678 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1679 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1680 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1681 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1682 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1683 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1684 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1685 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1686 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1687 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 },
1688 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
1689 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 },
1690 [NL80211_STA_INFO_STA_FLAGS] =
1691 { .minlen = sizeof(struct nl80211_sta_flag_update) },
1692 };
1693
1694 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1695 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1696 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1697 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1698 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1699 };
1700
1701 /* advance to end of array */
1702 e += arr->count;
1703 memset(e, 0, sizeof(*e));
1704
1705 if (attr[NL80211_ATTR_MAC])
1706 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1707
1708 if (attr[NL80211_ATTR_STA_INFO] &&
1709 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1710 attr[NL80211_ATTR_STA_INFO], stats_policy))
1711 {
1712 if (sinfo[NL80211_STA_INFO_SIGNAL])
1713 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1714
1715 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1716 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1717
1718 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1719 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1720
1721 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1722 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1723
1724 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1725 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1726 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1727 nl80211_parse_rateinfo(rinfo, &e->rx_rate);
1728
1729 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1730 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1731 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1732 nl80211_parse_rateinfo(rinfo, &e->tx_rate);
1733
1734 if (sinfo[NL80211_STA_INFO_RX_BYTES])
1735 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
1736
1737 if (sinfo[NL80211_STA_INFO_TX_BYTES])
1738 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
1739
1740 if (sinfo[NL80211_STA_INFO_TX_RETRIES])
1741 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
1742
1743 if (sinfo[NL80211_STA_INFO_TX_FAILED])
1744 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
1745
1746 if (sinfo[NL80211_STA_INFO_T_OFFSET])
1747 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]);
1748
1749 /* Station flags */
1750 if (sinfo[NL80211_STA_INFO_STA_FLAGS])
1751 {
1752 sta_flags = (struct nl80211_sta_flag_update *)
1753 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
1754
1755 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
1756 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
1757 e->is_authorized = 1;
1758
1759 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
1760 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1761 e->is_authenticated = 1;
1762
1763 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
1764 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1765 e->is_preamble_short = 1;
1766
1767 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
1768 sta_flags->set & BIT(NL80211_STA_FLAG_WME))
1769 e->is_wme = 1;
1770
1771 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
1772 sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
1773 e->is_mfp = 1;
1774
1775 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
1776 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1777 e->is_tdls = 1;
1778 }
1779 }
1780
1781 e->noise = 0; /* filled in by caller */
1782 arr->count++;
1783
1784 return NL_SKIP;
1785 }
1786
1787 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1788 {
1789 DIR *d;
1790 int i, noise = 0;
1791 struct dirent *de;
1792 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1793 struct iwinfo_assoclist_entry *e;
1794
1795 if ((d = opendir("/sys/class/net")) != NULL)
1796 {
1797 while ((de = readdir(d)) != NULL)
1798 {
1799 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1800 (!de->d_name[strlen(ifname)] ||
1801 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1802 {
1803 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
1804 NLM_F_DUMP, nl80211_get_assoclist_cb, &arr);
1805 }
1806 }
1807
1808 closedir(d);
1809
1810 if (!nl80211_get_noise(ifname, &noise))
1811 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1812 e->noise = noise;
1813
1814 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1815 return 0;
1816 }
1817
1818 return -1;
1819 }
1820
1821 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1822 {
1823 int *dbm_max = arg;
1824 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1825
1826 struct nlattr **attr = nl80211_parse(msg);
1827 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1828 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1829 struct nlattr *band, *freq;
1830
1831 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1832 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1833 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1834 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1835 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1836 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1837 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1838 };
1839
1840 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1841 *dbm_max = -1;
1842
1843 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1844 {
1845 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1846 nla_len(band), NULL);
1847
1848 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1849 {
1850 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1851 nla_data(freq), nla_len(freq), freq_policy);
1852
1853 ch_cmp = nl80211_freq2channel(nla_get_u32(
1854 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1855
1856 if ((!ch_cur || (ch_cmp == ch_cur)) &&
1857 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1858 {
1859 *dbm_max = (int)(0.01 * nla_get_u32(
1860 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1861
1862 break;
1863 }
1864 }
1865 }
1866
1867 return NL_SKIP;
1868 }
1869
1870 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1871 {
1872 int err, ch_cur;
1873 int dbm_max = -1, dbm_cur, dbm_cnt;
1874 struct nl80211_msg_conveyor *req;
1875 struct iwinfo_txpwrlist_entry entry;
1876
1877 if (nl80211_get_channel(ifname, &ch_cur))
1878 ch_cur = 0;
1879
1880 /* initialize the value pointer with channel for callback */
1881 dbm_max = ch_cur;
1882
1883 err = nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
1884 nl80211_get_txpwrlist_cb, &dbm_max);
1885
1886 if (!err)
1887 {
1888 for (dbm_cur = 0, dbm_cnt = 0;
1889 dbm_cur < dbm_max;
1890 dbm_cur++, dbm_cnt++)
1891 {
1892 entry.dbm = dbm_cur;
1893 entry.mw = iwinfo_dbm2mw(dbm_cur);
1894
1895 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1896 }
1897
1898 entry.dbm = dbm_max;
1899 entry.mw = iwinfo_dbm2mw(dbm_max);
1900
1901 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1902 dbm_cnt++;
1903
1904 *len = dbm_cnt * sizeof(entry);
1905 return 0;
1906 }
1907
1908 return -1;
1909 }
1910
1911 static void nl80211_get_scancrypto(const char *spec,
1912 struct iwinfo_crypto_entry *c)
1913 {
1914 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1915 {
1916 c->enabled = 1;
1917
1918 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1919 c->wpa_version = 3;
1920
1921 else if (strstr(spec, "WPA2"))
1922 c->wpa_version = 2;
1923
1924 else if (strstr(spec, "WPA"))
1925 c->wpa_version = 1;
1926
1927 else if (strstr(spec, "WEP"))
1928 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1929
1930
1931 if (strstr(spec, "PSK"))
1932 c->auth_suites |= IWINFO_KMGMT_PSK;
1933
1934 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1935 c->auth_suites |= IWINFO_KMGMT_8021x;
1936
1937 if (strstr(spec, "WPA-NONE"))
1938 c->auth_suites |= IWINFO_KMGMT_NONE;
1939
1940
1941 if (strstr(spec, "TKIP"))
1942 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1943
1944 if (strstr(spec, "CCMP"))
1945 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1946
1947 if (strstr(spec, "WEP-40"))
1948 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1949
1950 if (strstr(spec, "WEP-104"))
1951 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1952
1953 c->group_ciphers = c->pair_ciphers;
1954 }
1955 else
1956 {
1957 c->enabled = 0;
1958 }
1959 }
1960
1961
1962 struct nl80211_scanlist {
1963 struct iwinfo_scanlist_entry *e;
1964 int len;
1965 };
1966
1967
1968 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1969 struct iwinfo_scanlist_entry *e)
1970 {
1971 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1972 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1973 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1974 int len;
1975
1976 while (ielen >= 2 && ielen >= ie[1])
1977 {
1978 switch (ie[0])
1979 {
1980 case 0: /* SSID */
1981 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
1982 memcpy(e->ssid, ie + 2, len);
1983 e->ssid[len] = 0;
1984 break;
1985
1986 case 48: /* RSN */
1987 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1988 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1989 break;
1990
1991 case 221: /* Vendor */
1992 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1993 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1994 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1995 break;
1996 }
1997
1998 ielen -= ie[1] + 2;
1999 ie += ie[1] + 2;
2000 }
2001 }
2002
2003 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
2004 {
2005 int8_t rssi;
2006 uint16_t caps;
2007
2008 struct nl80211_scanlist *sl = arg;
2009 struct nlattr **tb = nl80211_parse(msg);
2010 struct nlattr *bss[NL80211_BSS_MAX + 1];
2011
2012 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2013 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2014 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2015 [NL80211_BSS_BSSID] = { 0 },
2016 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2017 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2018 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
2019 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2020 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2021 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2022 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2023 [NL80211_BSS_BEACON_IES] = { 0 },
2024 };
2025
2026 if (!tb[NL80211_ATTR_BSS] ||
2027 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2028 bss_policy) ||
2029 !bss[NL80211_BSS_BSSID])
2030 {
2031 return NL_SKIP;
2032 }
2033
2034 if (bss[NL80211_BSS_CAPABILITY])
2035 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2036 else
2037 caps = 0;
2038
2039 memset(sl->e, 0, sizeof(*sl->e));
2040 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
2041
2042 if (caps & (1<<1))
2043 sl->e->mode = IWINFO_OPMODE_ADHOC;
2044 else if (caps & (1<<0))
2045 sl->e->mode = IWINFO_OPMODE_MASTER;
2046 else
2047 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
2048
2049 if (caps & (1<<4))
2050 sl->e->crypto.enabled = 1;
2051
2052 if (bss[NL80211_BSS_FREQUENCY])
2053 sl->e->channel = nl80211_freq2channel(nla_get_u32(
2054 bss[NL80211_BSS_FREQUENCY]));
2055
2056 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
2057 nl80211_get_scanlist_ie(bss, sl->e);
2058
2059 if (bss[NL80211_BSS_SIGNAL_MBM])
2060 {
2061 sl->e->signal =
2062 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
2063
2064 rssi = sl->e->signal - 0x100;
2065
2066 if (rssi < -110)
2067 rssi = -110;
2068 else if (rssi > -40)
2069 rssi = -40;
2070
2071 sl->e->quality = (rssi + 110);
2072 sl->e->quality_max = 70;
2073 }
2074
2075 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
2076 {
2077 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2078 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2079 }
2080
2081 sl->e++;
2082 sl->len++;
2083
2084 return NL_SKIP;
2085 }
2086
2087 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
2088 {
2089 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
2090
2091 if (nl80211_request(ifname, NL80211_CMD_TRIGGER_SCAN, 0, NULL, NULL))
2092 goto out;
2093
2094 if (nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS))
2095 goto out;
2096
2097 if (nl80211_request(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
2098 nl80211_get_scanlist_cb, &sl))
2099 goto out;
2100
2101 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
2102 return 0;
2103
2104 out:
2105 *len = 0;
2106 return -1;
2107 }
2108
2109 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
2110 {
2111 #define hex(x) \
2112 (((x) >= 'a') ? ((x) - 'a' + 10) : \
2113 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0')))
2114
2115 int len = 0;
2116
2117 while (*in)
2118 {
2119 if (len + 1 >= outlen)
2120 break;
2121
2122 switch (*in)
2123 {
2124 case '\\':
2125 in++;
2126 switch (*in)
2127 {
2128 case 'n':
2129 out[len++] = '\n'; in++;
2130 break;
2131
2132 case 'r':
2133 out[len++] = '\r'; in++;
2134 break;
2135
2136 case 't':
2137 out[len++] = '\t'; in++;
2138 break;
2139
2140 case 'e':
2141 out[len++] = '\033'; in++;
2142 break;
2143
2144 case 'x':
2145 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
2146 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
2147 in += 3;
2148 break;
2149
2150 default:
2151 out[len++] = *in++;
2152 break;
2153 }
2154 break;
2155
2156 default:
2157 out[len++] = *in++;
2158 break;
2159 }
2160 }
2161
2162 if (outlen > len)
2163 out[len] = '\0';
2164
2165 return len;
2166 }
2167
2168 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len)
2169 {
2170 int sock, qmax, rssi, tries, count = -1, ready = 0;
2171 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096];
2172 struct sockaddr_un local = { 0 };
2173 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
2174
2175 sock = nl80211_wpactl_connect(ifname, &local);
2176
2177 if (sock < 0)
2178 return sock;
2179
2180 send(sock, "ATTACH", 6, 0);
2181 send(sock, "SCAN", 4, 0);
2182
2183 /*
2184 * wait for scan results:
2185 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan
2186 * 72 channels at most. We'll also receive two "OK" messages acknowledging
2187 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra
2188 * time to process the results, so try 72 + 2 + 1 times.
2189 */
2190 for (tries = 0; tries < 75; tries++)
2191 {
2192 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0)
2193 continue;
2194
2195 /* got an event notification */
2196 if (reply[0] == '<')
2197 {
2198 /* scan results are ready */
2199 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS"))
2200 {
2201 /* send "SCAN_RESULTS" command */
2202 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12);
2203 break;
2204 }
2205
2206 /* is another unrelated event, retry */
2207 tries--;
2208 }
2209 }
2210
2211 /* receive and parse scan results if the wait above didn't time out */
2212 if (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
2213 {
2214 nl80211_get_quality_max(ifname, &qmax);
2215
2216 for (line = strtok_r(reply, "\n", &pos);
2217 line != NULL;
2218 line = strtok_r(NULL, "\n", &pos))
2219 {
2220 /* skip header line */
2221 if (count < 0)
2222 {
2223 count++;
2224 continue;
2225 }
2226
2227 bssid = strtok(line, "\t");
2228 freq = strtok(NULL, "\t");
2229 signal = strtok(NULL, "\t");
2230 flags = strtok(NULL, "\t");
2231 ssid = strtok(NULL, "\n");
2232
2233 if (!bssid || !freq || !signal || !flags || !ssid)
2234 continue;
2235
2236 /* BSSID */
2237 e->mac[0] = strtol(&bssid[0], NULL, 16);
2238 e->mac[1] = strtol(&bssid[3], NULL, 16);
2239 e->mac[2] = strtol(&bssid[6], NULL, 16);
2240 e->mac[3] = strtol(&bssid[9], NULL, 16);
2241 e->mac[4] = strtol(&bssid[12], NULL, 16);
2242 e->mac[5] = strtol(&bssid[15], NULL, 16);
2243
2244 /* SSID */
2245 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2246
2247 /* Mode */
2248 if (strstr(flags, "[MESH]"))
2249 e->mode = IWINFO_OPMODE_MESHPOINT;
2250 else if (strstr(flags, "[IBSS]"))
2251 e->mode = IWINFO_OPMODE_ADHOC;
2252 else
2253 e->mode = IWINFO_OPMODE_MASTER;
2254
2255 /* Channel */
2256 e->channel = nl80211_freq2channel(atoi(freq));
2257
2258 /* Signal */
2259 rssi = atoi(signal);
2260 e->signal = rssi;
2261
2262 /* Quality */
2263 if (rssi < 0)
2264 {
2265 /* The cfg80211 wext compat layer assumes a signal range
2266 * of -110 dBm to -40 dBm, the quality value is derived
2267 * by adding 110 to the signal level */
2268 if (rssi < -110)
2269 rssi = -110;
2270 else if (rssi > -40)
2271 rssi = -40;
2272
2273 e->quality = (rssi + 110);
2274 }
2275 else
2276 {
2277 e->quality = rssi;
2278 }
2279
2280 /* Max. Quality */
2281 e->quality_max = qmax;
2282
2283 /* Crypto */
2284 nl80211_get_scancrypto(flags, &e->crypto);
2285
2286 count++;
2287 e++;
2288 }
2289
2290 *len = count * sizeof(struct iwinfo_scanlist_entry);
2291 }
2292
2293 close(sock);
2294 unlink(local.sun_path);
2295
2296 return (count >= 0) ? 0 : -1;
2297 }
2298
2299 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
2300 {
2301 char *res;
2302 int rv, mode;
2303
2304 *len = 0;
2305
2306 /* Got a radioX pseudo interface, find some interface on it or create one */
2307 if (!strncmp(ifname, "radio", 5))
2308 {
2309 /* Reuse existing interface */
2310 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2311 {
2312 return nl80211_get_scanlist(res, buf, len);
2313 }
2314
2315 /* Need to spawn a temporary iface for scanning */
2316 else if ((res = nl80211_ifadd(ifname)) != NULL)
2317 {
2318 rv = nl80211_get_scanlist(res, buf, len);
2319 nl80211_ifdel(res);
2320 return rv;
2321 }
2322 }
2323
2324 /* WPA supplicant */
2325 if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
2326 {
2327 return 0;
2328 }
2329
2330 /* station / ad-hoc / monitor scan */
2331 else if (!nl80211_get_mode(ifname, &mode) &&
2332 (mode == IWINFO_OPMODE_ADHOC ||
2333 mode == IWINFO_OPMODE_MASTER ||
2334 mode == IWINFO_OPMODE_CLIENT ||
2335 mode == IWINFO_OPMODE_MONITOR) &&
2336 iwinfo_ifup(ifname))
2337 {
2338 return nl80211_get_scanlist_nl(ifname, buf, len);
2339 }
2340
2341 /* AP scan */
2342 else
2343 {
2344 /* Got a temp interface, don't create yet another one */
2345 if (!strncmp(ifname, "tmp.", 4))
2346 {
2347 if (!iwinfo_ifup(ifname))
2348 return -1;
2349
2350 rv = nl80211_get_scanlist_nl(ifname, buf, len);
2351 iwinfo_ifdown(ifname);
2352 return rv;
2353 }
2354
2355 /* Spawn a new scan interface */
2356 else
2357 {
2358 if (!(res = nl80211_ifadd(ifname)))
2359 return -1;
2360
2361 iwinfo_ifmac(res);
2362
2363 /* if we can take the new interface up, the driver supports an
2364 * additional interface and there's no need to tear down the ap */
2365 if (iwinfo_ifup(res))
2366 {
2367 rv = nl80211_get_scanlist_nl(res, buf, len);
2368 iwinfo_ifdown(res);
2369 }
2370
2371 /* driver cannot create secondary interface, take down ap
2372 * during scan */
2373 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2374 {
2375 rv = nl80211_get_scanlist_nl(res, buf, len);
2376 iwinfo_ifdown(res);
2377 iwinfo_ifup(ifname);
2378 nl80211_hostapd_hup(ifname);
2379 }
2380
2381 nl80211_ifdel(res);
2382 return rv;
2383 }
2384 }
2385
2386 return -1;
2387 }
2388
2389 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2390 {
2391 int bands_remain, freqs_remain;
2392
2393 struct nl80211_array_buf *arr = arg;
2394 struct iwinfo_freqlist_entry *e;
2395
2396 struct nlattr **attr = nl80211_parse(msg);
2397 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2398 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2399 struct nlattr *band, *freq;
2400
2401 e = arr->buf;
2402 e += arr->count;
2403
2404 if (attr[NL80211_ATTR_WIPHY_BANDS]) {
2405 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2406 {
2407 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2408 nla_data(band), nla_len(band), NULL);
2409
2410 if (bands[NL80211_BAND_ATTR_FREQS]) {
2411 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2412 {
2413 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2414 nla_data(freq), nla_len(freq), NULL);
2415
2416 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2417 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2418 continue;
2419
2420 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2421 e->channel = nl80211_freq2channel(e->mhz);
2422
2423 e->restricted = (
2424 freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
2425 !freqs[NL80211_FREQUENCY_ATTR_RADAR]
2426 ) ? 1 : 0;
2427
2428 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_MINUS])
2429 e->flags |= IWINFO_FREQ_NO_HT40MINUS;
2430 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_PLUS])
2431 e->flags |= IWINFO_FREQ_NO_HT40PLUS;
2432 if (freqs[NL80211_FREQUENCY_ATTR_NO_80MHZ])
2433 e->flags |= IWINFO_FREQ_NO_80MHZ;
2434 if (freqs[NL80211_FREQUENCY_ATTR_NO_160MHZ])
2435 e->flags |= IWINFO_FREQ_NO_160MHZ;
2436 if (freqs[NL80211_FREQUENCY_ATTR_NO_20MHZ])
2437 e->flags |= IWINFO_FREQ_NO_20MHZ;
2438 if (freqs[NL80211_FREQUENCY_ATTR_NO_10MHZ])
2439 e->flags |= IWINFO_FREQ_NO_10MHZ;
2440
2441 e++;
2442 arr->count++;
2443 }
2444 }
2445 }
2446 }
2447
2448 return NL_SKIP;
2449 }
2450
2451 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2452 {
2453 struct nl80211_msg_conveyor *cv;
2454 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2455 uint32_t features = nl80211_get_protocol_features(ifname);
2456 int flags;
2457
2458 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
2459 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
2460 if (!cv)
2461 goto out;
2462
2463 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
2464 if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr))
2465 goto out;
2466
2467 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2468 return 0;
2469
2470 nla_put_failure:
2471 nl80211_free(cv);
2472 out:
2473 *len = 0;
2474 return -1;
2475 }
2476
2477 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2478 {
2479 char *buf = arg;
2480 struct nlattr **attr = nl80211_parse(msg);
2481
2482 if (attr[NL80211_ATTR_REG_ALPHA2])
2483 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2484 else
2485 buf[0] = 0;
2486
2487 return NL_SKIP;
2488 }
2489
2490 static int nl80211_get_country(const char *ifname, char *buf)
2491 {
2492 if (nl80211_request(ifname, NL80211_CMD_GET_REG, 0,
2493 nl80211_get_country_cb, buf))
2494 return -1;
2495
2496 return 0;
2497 }
2498
2499 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2500 {
2501 int count;
2502 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2503 const struct iwinfo_iso3166_label *l;
2504
2505 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2506 {
2507 e->iso3166 = l->iso3166;
2508 e->ccode[0] = (l->iso3166 / 256);
2509 e->ccode[1] = (l->iso3166 % 256);
2510 e->ccode[2] = 0;
2511 }
2512
2513 *len = (count * sizeof(struct iwinfo_country_entry));
2514 return 0;
2515 }
2516
2517
2518 struct nl80211_modes
2519 {
2520 bool ok;
2521 uint32_t hw;
2522 uint32_t ht;
2523 };
2524
2525 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
2526 {
2527 struct nl80211_modes *m = arg;
2528 int bands_remain, freqs_remain;
2529 uint16_t caps = 0;
2530 uint32_t vht_caps = 0;
2531 struct nlattr **attr = nl80211_parse(msg);
2532 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2533 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2534 struct nlattr *band, *freq;
2535
2536 if (attr[NL80211_ATTR_WIPHY_BANDS])
2537 {
2538 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2539 {
2540 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2541 nla_data(band), nla_len(band), NULL);
2542
2543 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2544 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2545
2546 /* Treat any nonzero capability as 11n */
2547 if (caps > 0)
2548 {
2549 m->hw |= IWINFO_80211_N;
2550 m->ht |= IWINFO_HTMODE_HT20;
2551
2552 if (caps & (1 << 1))
2553 m->ht |= IWINFO_HTMODE_HT40;
2554 }
2555
2556 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2557 freqs_remain)
2558 {
2559 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2560 nla_data(freq), nla_len(freq), NULL);
2561
2562 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2563 continue;
2564
2565 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2566 {
2567 m->hw |= IWINFO_80211_B;
2568 m->hw |= IWINFO_80211_G;
2569 }
2570 else if (bands[NL80211_BAND_ATTR_VHT_CAPA])
2571 {
2572 vht_caps = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
2573
2574 /* Treat any nonzero capability as 11ac */
2575 if (vht_caps > 0)
2576 {
2577 m->hw |= IWINFO_80211_AC;
2578 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
2579
2580 switch ((vht_caps >> 2) & 3)
2581 {
2582 case 2:
2583 m->ht |= IWINFO_HTMODE_VHT80_80;
2584 /* fall through */
2585
2586 case 1:
2587 m->ht |= IWINFO_HTMODE_VHT160;
2588 }
2589 }
2590 }
2591 else if (!(m->hw & IWINFO_80211_AC))
2592 {
2593 m->hw |= IWINFO_80211_A;
2594 }
2595 }
2596 }
2597
2598 m->ok = 1;
2599 }
2600
2601 return NL_SKIP;
2602 }
2603
2604 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
2605 {
2606 struct nl80211_modes m = { 0 };
2607
2608 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2609 nl80211_get_modelist_cb, &m))
2610 goto out;
2611
2612 if (!m.ok)
2613 goto out;
2614
2615 *buf = m.hw;
2616 return 0;
2617
2618 out:
2619 *buf = 0;
2620 return -1;
2621 }
2622
2623 static int nl80211_get_htmodelist(const char *ifname, int *buf)
2624 {
2625 struct nl80211_modes m = { 0 };
2626
2627 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2628 nl80211_get_modelist_cb, &m))
2629 goto out;
2630
2631 if (!m.ok)
2632 goto out;
2633
2634 *buf = m.ht;
2635 return 0;
2636
2637 out:
2638 *buf = 0;
2639 return -1;
2640 }
2641
2642
2643 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
2644 {
2645 struct nlattr **attr = nl80211_parse(msg);
2646 struct nlattr *comb;
2647 int *ret = arg;
2648 int comb_rem, limit_rem, mode_rem;
2649
2650 *ret = 0;
2651 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
2652 return NL_SKIP;
2653
2654 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
2655 {
2656 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
2657 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
2658 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
2659 };
2660 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1];
2661 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
2662 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
2663 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
2664 };
2665 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1];
2666 struct nlattr *limit;
2667
2668 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy);
2669
2670 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
2671 continue;
2672
2673 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
2674 {
2675 struct nlattr *mode;
2676
2677 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
2678
2679 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
2680 !tb_limit[NL80211_IFACE_LIMIT_MAX])
2681 continue;
2682
2683 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
2684 continue;
2685
2686 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
2687 if (nla_type(mode) == NL80211_IFTYPE_AP)
2688 *ret = 1;
2689 }
2690 }
2691 }
2692
2693 return NL_SKIP;
2694 }
2695
2696 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
2697 {
2698 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2699 nl80211_get_ifcomb_cb, buf))
2700 return -1;
2701
2702 return 0;
2703 }
2704
2705 static int nl80211_get_hardware_id(const char *ifname, char *buf)
2706 {
2707 int rv = -1;
2708 char *res;
2709
2710 /* Got a radioX pseudo interface, find some interface on it or create one */
2711 if (!strncmp(ifname, "radio", 5))
2712 {
2713 /* Reuse existing interface */
2714 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2715 {
2716 rv = wext_ops.hardware_id(res, buf);
2717 }
2718
2719 /* Need to spawn a temporary iface for finding IDs */
2720 else if ((res = nl80211_ifadd(ifname)) != NULL)
2721 {
2722 rv = wext_ops.hardware_id(res, buf);
2723 nl80211_ifdel(res);
2724 }
2725 }
2726 else
2727 {
2728 rv = wext_ops.hardware_id(ifname, buf);
2729 }
2730
2731 /* Failed to obtain hardware IDs, search board config */
2732 if (rv)
2733 {
2734 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2735 }
2736
2737 return rv;
2738 }
2739
2740 static const struct iwinfo_hardware_entry *
2741 nl80211_get_hardware_entry(const char *ifname)
2742 {
2743 struct iwinfo_hardware_id id;
2744
2745 if (nl80211_get_hardware_id(ifname, (char *)&id))
2746 return NULL;
2747
2748 return iwinfo_hardware(&id);
2749 }
2750
2751 static int nl80211_get_hardware_name(const char *ifname, char *buf)
2752 {
2753 const struct iwinfo_hardware_entry *hw;
2754
2755 if (!(hw = nl80211_get_hardware_entry(ifname)))
2756 sprintf(buf, "Generic MAC80211");
2757 else
2758 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2759
2760 return 0;
2761 }
2762
2763 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
2764 {
2765 const struct iwinfo_hardware_entry *hw;
2766
2767 if (!(hw = nl80211_get_hardware_entry(ifname)))
2768 return -1;
2769
2770 *buf = hw->txpower_offset;
2771 return 0;
2772 }
2773
2774 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
2775 {
2776 const struct iwinfo_hardware_entry *hw;
2777
2778 if (!(hw = nl80211_get_hardware_entry(ifname)))
2779 return -1;
2780
2781 *buf = hw->frequency_offset;
2782 return 0;
2783 }
2784
2785 static int nl80211_lookup_phyname(const char *section, char *buf)
2786 {
2787 int idx;
2788
2789 if ((idx = nl80211_phy_idx_from_uci(section)) < 0)
2790 return -1;
2791
2792 sprintf(buf, "phy%d", idx);
2793 return 0;
2794 }
2795
2796 const struct iwinfo_ops nl80211_ops = {
2797 .name = "nl80211",
2798 .probe = nl80211_probe,
2799 .channel = nl80211_get_channel,
2800 .frequency = nl80211_get_frequency,
2801 .frequency_offset = nl80211_get_frequency_offset,
2802 .txpower = nl80211_get_txpower,
2803 .txpower_offset = nl80211_get_txpower_offset,
2804 .bitrate = nl80211_get_bitrate,
2805 .signal = nl80211_get_signal,
2806 .noise = nl80211_get_noise,
2807 .quality = nl80211_get_quality,
2808 .quality_max = nl80211_get_quality_max,
2809 .mbssid_support = nl80211_get_mbssid_support,
2810 .hwmodelist = nl80211_get_hwmodelist,
2811 .htmodelist = nl80211_get_htmodelist,
2812 .mode = nl80211_get_mode,
2813 .ssid = nl80211_get_ssid,
2814 .bssid = nl80211_get_bssid,
2815 .country = nl80211_get_country,
2816 .hardware_id = nl80211_get_hardware_id,
2817 .hardware_name = nl80211_get_hardware_name,
2818 .encryption = nl80211_get_encryption,
2819 .phyname = nl80211_get_phyname,
2820 .assoclist = nl80211_get_assoclist,
2821 .txpwrlist = nl80211_get_txpwrlist,
2822 .scanlist = nl80211_get_scanlist,
2823 .freqlist = nl80211_get_freqlist,
2824 .countrylist = nl80211_get_countrylist,
2825 .lookup_phy = nl80211_lookup_phyname,
2826 .close = nl80211_close
2827 };
Library for accessing wireless device drivers