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