• source navigation  • diff markup  • identifier search  • freetext search  • 

Sources/iwinfo/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 #include <stdlib.h>
 30 
 31 #include "iwinfo_nl80211.h"
 32 
 33 #define min(x, y) ((x) < (y)) ? (x) : (y)
 34 
 35 #define BIT(x) (1ULL<<(x))
 36 
 37 static struct nl80211_state *nls = NULL;
 38 
 39 static void nl80211_close(void)
 40 {
 41         if (nls)
 42         {
 43                 if (nls->nlctrl)
 44                         genl_family_put(nls->nlctrl);
 45 
 46                 if (nls->nl80211)
 47                         genl_family_put(nls->nl80211);
 48 
 49                 if (nls->nl_sock)
 50                         nl_socket_free(nls->nl_sock);
 51 
 52                 if (nls->nl_cache)
 53                         nl_cache_free(nls->nl_cache);
 54 
 55                 free(nls);
 56                 nls = NULL;
 57         }
 58 }
 59 
 60 static int nl80211_init(void)
 61 {
 62         int err, fd;
 63 
 64         if (!nls)
 65         {
 66                 nls = malloc(sizeof(struct nl80211_state));
 67                 if (!nls) {
 68                         err = -ENOMEM;
 69                         goto err;
 70                 }
 71 
 72                 memset(nls, 0, sizeof(*nls));
 73 
 74                 nls->nl_sock = nl_socket_alloc();
 75                 if (!nls->nl_sock) {
 76                         err = -ENOMEM;
 77                         goto err;
 78                 }
 79 
 80                 if (genl_connect(nls->nl_sock)) {
 81                         err = -ENOLINK;
 82                         goto err;
 83                 }
 84 
 85                 fd = nl_socket_get_fd(nls->nl_sock);
 86                 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
 87                         err = -EINVAL;
 88                         goto err;
 89                 }
 90 
 91                 if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
 92                         err = -ENOMEM;
 93                         goto err;
 94                 }
 95 
 96                 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
 97                 if (!nls->nl80211) {
 98                         err = -ENOENT;
 99                         goto err;
100                 }
101 
102                 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
103                 if (!nls->nlctrl) {
104                         err = -ENOENT;
105                         goto err;
106                 }
107         }
108 
109         return 0;
110 
111 
112 err:
113         nl80211_close();
114         return err;
115 }
116 
117 static int nl80211_readint(const char *path)
118 {
119         int fd;
120         int rv = -1;
121         char buffer[16];
122 
123         if ((fd = open(path, O_RDONLY)) > -1)
124         {
125                 if (read(fd, buffer, sizeof(buffer)) > 0)
126                         rv = atoi(buffer);
127 
128                 close(fd);
129         }
130 
131         return rv;
132 }
133 
134 static int nl80211_readstr(const char *path, char *buffer, int length)
135 {
136         int fd;
137         int rv = -1;
138 
139         if ((fd = open(path, O_RDONLY)) > -1)
140         {
141                 if ((rv = read(fd, buffer, length - 1)) > 0)
142                 {
143                         if (buffer[rv - 1] == '\n')
144                                 rv--;
145 
146                         buffer[rv] = 0;
147                 }
148 
149                 close(fd);
150         }
151 
152         return rv;
153 }
154 
155 
156 static int nl80211_msg_error(struct sockaddr_nl *nla,
157         struct nlmsgerr *err, void *arg)
158 {
159         int *ret = arg;
160         *ret = err->error;
161         return NL_STOP;
162 }
163 
164 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
165 {
166         int *ret = arg;
167         *ret = 0;
168         return NL_SKIP;
169 }
170 
171 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
172 {
173         int *ret = arg;
174         *ret = 0;
175         return NL_STOP;
176 }
177 
178 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
179 {
180         return NL_SKIP;
181 }
182 
183 static void nl80211_free(struct nl80211_msg_conveyor *cv)
184 {
185         if (cv)
186         {
187                 if (cv->cb)
188                         nl_cb_put(cv->cb);
189 
190                 if (cv->msg)
191                         nlmsg_free(cv->msg);
192 
193                 cv->cb  = NULL;
194                 cv->msg = NULL;
195         }
196 }
197 
198 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
199                                                  int cmd, int flags)
200 {
201         static struct nl80211_msg_conveyor cv;
202 
203         struct nl_msg *req = NULL;
204         struct nl_cb *cb = NULL;
205 
206         req = nlmsg_alloc();
207         if (!req)
208                 goto err;
209 
210         cb = nl_cb_alloc(NL_CB_DEFAULT);
211         if (!cb)
212                 goto err;
213 
214         genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
215 
216         cv.msg = req;
217         cv.cb  = cb;
218 
219         return &cv;
220 
221 err:
222         if (req)
223                 nlmsg_free(req);
224 
225         return NULL;
226 }
227 
228 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
229 {
230         if (nl80211_init() < 0)
231                 return NULL;
232 
233         return nl80211_new(nls->nlctrl, cmd, flags);
234 }
235 
236 static int nl80211_phy_idx_from_uci_path(struct uci_section *s)
237 {
238         size_t linklen, pathlen;
239         char buf[128], *link;
240         struct dirent *e;
241         const char *path;
242         int idx = -1;
243         DIR *d;
244 
245         path = uci_lookup_option_string(uci_ctx, s, "path");
246         if (!path)
247                 return -1;
248 
249         if ((d = opendir("/sys/class/ieee80211")) != NULL)
250         {
251                 while ((e = readdir(d)) != NULL)
252                 {
253                         snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/device", e->d_name);
254 
255                         link = realpath(buf, NULL);
256 
257                         if (link == NULL)
258                                 continue;
259 
260                         linklen = strlen(link);
261                         pathlen = strlen(path);
262 
263                         if (pathlen >= linklen || strcmp(link + (linklen - pathlen), path))
264                                 linklen = 0;
265 
266                         free(link);
267 
268                         if (linklen == 0)
269                                 continue;
270 
271                         snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", e->d_name);
272 
273                         idx = nl80211_readint(buf);
274 
275                         if (idx >= 0)
276                                 break;
277                 }
278 
279                 closedir(d);
280         }
281 
282         return idx;
283 }
284 
285 static int nl80211_phy_idx_from_uci_macaddr(struct uci_section *s)
286 {
287         const char *opt;
288         char buf[128];
289         int i, idx = -1;
290         glob_t gl;
291 
292         opt = uci_lookup_option_string(uci_ctx, s, "macaddr");
293         if (!opt)
294                 return -1;
295 
296         snprintf(buf, sizeof(buf), "/sys/class/ieee80211/*");   /**/
297         if (glob(buf, 0, NULL, &gl))
298                 return -1;
299 
300         for (i = 0; i < gl.gl_pathc; i++)
301         {
302                 snprintf(buf, sizeof(buf), "%s/macaddress", gl.gl_pathv[i]);
303                 if (nl80211_readstr(buf, buf, sizeof(buf)) <= 0)
304                         continue;
305 
306                 if (fnmatch(opt, buf, FNM_CASEFOLD))
307                         continue;
308 
309                 snprintf(buf, sizeof(buf), "%s/index", gl.gl_pathv[i]);
310                 if ((idx = nl80211_readint(buf)) > -1)
311                         break;
312         }
313 
314         globfree(&gl);
315 
316         return idx;
317 }
318 
319 static int nl80211_phy_idx_from_uci_phy(struct uci_section *s)
320 {
321         const char *opt;
322         char buf[128];
323 
324         opt = uci_lookup_option_string(uci_ctx, s, "phy");
325         if (!opt)
326                 return -1;
327 
328         snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", opt);
329         return nl80211_readint(buf);
330 }
331 
332 static int nl80211_phy_idx_from_uci(const char *name)
333 {
334         struct uci_section *s;
335         int idx = -1;
336 
337         s = iwinfo_uci_get_radio(name, "mac80211");
338         if (!s)
339                 goto free;
340 
341         idx = nl80211_phy_idx_from_uci_path(s);
342 
343         if (idx < 0)
344                 idx = nl80211_phy_idx_from_uci_macaddr(s);
345 
346         if (idx < 0)
347                 idx = nl80211_phy_idx_from_uci_phy(s);
348 
349 free:
350         iwinfo_uci_free();
351         return idx;
352 }
353 
354 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
355                                                  int cmd, int flags)
356 {
357         int ifidx = -1, phyidx = -1;
358         struct nl80211_msg_conveyor *cv;
359 
360         if (ifname == NULL)
361                 return NULL;
362 
363         if (nl80211_init() < 0)
364                 return NULL;
365 
366         if (!strncmp(ifname, "phy", 3))
367                 phyidx = atoi(&ifname[3]);
368         else if (!strncmp(ifname, "radio", 5))
369                 phyidx = nl80211_phy_idx_from_uci(ifname);
370 
371         if (!strncmp(ifname, "mon.", 4))
372                 ifidx = if_nametoindex(&ifname[4]);
373         else
374                 ifidx = if_nametoindex(ifname);
375 
376         /* Valid ifidx must be greater than 0 */
377         if ((ifidx <= 0) && (phyidx < 0))
378                 return NULL;
379 
380         cv = nl80211_new(nls->nl80211, cmd, flags);
381         if (!cv)
382                 return NULL;
383 
384         if (ifidx > 0)
385                 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
386         else if (phyidx > -1)
387                 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
388 
389         return cv;
390 
391 nla_put_failure:
392         nl80211_free(cv);
393         return NULL;
394 }
395 
396 static int nl80211_send(struct nl80211_msg_conveyor *cv,
397                         int (*cb_func)(struct nl_msg *, void *),
398                         void *cb_arg)
399 {
400         static struct nl80211_msg_conveyor rcv;
401         int err;
402 
403         if (cb_func)
404                 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
405         else
406                 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
407 
408         err = nl_send_auto_complete(nls->nl_sock, cv->msg);
409 
410         if (err < 0)
411                 goto out;
412 
413         err = 1;
414 
415         nl_cb_err(cv->cb,               NL_CB_CUSTOM, nl80211_msg_error,  &err);
416         nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
417         nl_cb_set(cv->cb, NL_CB_ACK,    NL_CB_CUSTOM, nl80211_msg_ack,    &err);
418 
419         while (err > 0)
420                 nl_recvmsgs(nls->nl_sock, cv->cb);
421 
422 out:
423         nl80211_free(cv);
424         return err;
425 }
426 
427 static int nl80211_request(const char *ifname, int cmd, int flags,
428                            int (*cb_func)(struct nl_msg *, void *),
429                            void *cb_arg)
430 {
431         struct nl80211_msg_conveyor *cv;
432 
433         cv = nl80211_msg(ifname, cmd, flags);
434 
435         if (!cv)
436                 return -ENOMEM;
437 
438         return nl80211_send(cv, cb_func, cb_arg);
439 }
440 
441 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
442 {
443         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
444         static struct nlattr *attr[NL80211_ATTR_MAX + 1];
445 
446         nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
447                   genlmsg_attrlen(gnlh, 0), NULL);
448 
449         return attr;
450 }
451 
452 static int nl80211_get_protocol_features_cb(struct nl_msg *msg, void *arg)
453 {
454         uint32_t *features = arg;
455         struct nlattr **attr = nl80211_parse(msg);
456 
457         if (attr[NL80211_ATTR_PROTOCOL_FEATURES])
458                 *features = nla_get_u32(attr[NL80211_ATTR_PROTOCOL_FEATURES]);
459 
460         return NL_SKIP;
461 }
462 
463 static int nl80211_get_protocol_features(const char *ifname)
464 {
465         struct nl80211_msg_conveyor *req;
466         uint32_t features = 0;
467 
468         req = nl80211_msg(ifname, NL80211_CMD_GET_PROTOCOL_FEATURES, 0);
469         if (req) {
470                 nl80211_send(req, nl80211_get_protocol_features_cb, &features);
471                 nl80211_free(req);
472         }
473 
474         return features;
475 }
476 
477 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
478 {
479         struct nl80211_group_conveyor *cv = arg;
480 
481         struct nlattr **attr = nl80211_parse(msg);
482         struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
483         struct nlattr *mgrp;
484         int mgrpidx;
485 
486         if (!attr[CTRL_ATTR_MCAST_GROUPS])
487                 return NL_SKIP;
488 
489         nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
490         {
491                 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
492                           nla_data(mgrp), nla_len(mgrp), NULL);
493 
494                 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
495                     mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
496                     !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
497                              cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
498                 {
499                         cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
500                         break;
501                 }
502         }
503 
504         return NL_SKIP;
505 }
506 
507 static int nl80211_subscribe(const char *family, const char *group)
508 {
509         struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
510         struct nl80211_msg_conveyor *req;
511         int err;
512 
513         req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
514         if (req)
515         {
516                 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
517                 err = nl80211_send(req, nl80211_subscribe_cb, &cv);
518 
519                 if (err)
520                         return err;
521 
522                 return nl_socket_add_membership(nls->nl_sock, cv.id);
523 
524 nla_put_failure:
525                 nl80211_free(req);
526         }
527 
528         return -ENOMEM;
529 }
530 
531 
532 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
533 {
534         struct nl80211_event_conveyor *cv = arg;
535         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
536 
537         if (cv->wait[gnlh->cmd / 32] & (1 << (gnlh->cmd % 32)))
538                 cv->recv = gnlh->cmd;
539 
540         return NL_SKIP;
541 }
542 
543 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
544 {
545         return NL_OK;
546 }
547 
548 static int __nl80211_wait(const char *family, const char *group, ...)
549 {
550         struct nl80211_event_conveyor cv = { };
551         struct nl_cb *cb;
552         int err = 0;
553         int cmd;
554         va_list ap;
555 
556         if (nl80211_subscribe(family, group))
557                 return -ENOENT;
558 
559         cb = nl_cb_alloc(NL_CB_DEFAULT);
560 
561         if (!cb)
562                 return -ENOMEM;
563 
564         nl_cb_err(cb,                  NL_CB_CUSTOM, nl80211_msg_error,      &err);
565         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
566         nl_cb_set(cb, NL_CB_VALID,     NL_CB_CUSTOM, nl80211_wait_cb,        &cv );
567 
568         va_start(ap, group);
569 
570         for (cmd = va_arg(ap, int); cmd != 0; cmd = va_arg(ap, int))
571                 cv.wait[cmd / 32] |= (1 << (cmd % 32));
572 
573         va_end(ap);
574 
575         while (!cv.recv && !err)
576                 nl_recvmsgs(nls->nl_sock, cb);
577 
578         nl_cb_put(cb);
579 
580         return err;
581 }
582 
583 #define nl80211_wait(family, group, ...) \
584         __nl80211_wait(family, group, __VA_ARGS__, 0)
585 
586 
587 static int nl80211_freq2channel(int freq)
588 {
589         if (freq == 2484)
590                 return 14;
591         else if (freq < 2484)
592                 return (freq - 2407) / 5;
593         else if (freq >= 4910 && freq <= 4980)
594                 return (freq - 4000) / 5;
595         else if(freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 6)
596                 return (freq - 56160) / 2160;
597         else
598                 return (freq - 5000) / 5;
599 }
600 
601 static int nl80211_channel2freq(int channel, const char *band)
602 {
603         if (!band || band[0] != 'a')
604         {
605                 if (channel == 14)
606                         return 2484;
607                 else if (channel < 14)
608                         return (channel * 5) + 2407;
609         }
610         else if ( strcmp(band, "ad") == 0)
611         {
612                 return 56160 + 2160 * channel;
613         }
614         else
615         {
616                 if (channel >= 182 && channel <= 196)
617                         return (channel * 5) + 4000;
618                 else
619                         return (channel * 5) + 5000;
620         }
621 
622         return 0;
623 }
624 
625 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
626 {
627         char *buf = arg;
628         struct nlattr **attr = nl80211_parse(msg);
629 
630         if (attr[NL80211_ATTR_WIPHY_NAME])
631                 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
632                        nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
633         else
634                 buf[0] = 0;
635 
636         return NL_SKIP;
637 }
638 
639 static char * nl80211_ifname2phy(const char *ifname)
640 {
641         static char phy[32] = { 0 };
642 
643         memset(phy, 0, sizeof(phy));
644 
645         nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
646                         nl80211_ifname2phy_cb, phy);
647 
648         return phy[0] ? phy : NULL;
649 }
650 
651 static char * nl80211_phy2ifname(const char *ifname)
652 {
653         int ifidx = -1, cifidx = -1, phyidx = -1;
654         char buffer[64];
655         static char nif[IFNAMSIZ] = { 0 };
656 
657         DIR *d;
658         struct dirent *e;
659 
660         /* Only accept phy name of the form phy%d or radio%d */
661         if (!ifname)
662                 return NULL;
663         else if (!strncmp(ifname, "phy", 3))
664                 phyidx = atoi(&ifname[3]);
665         else if (!strncmp(ifname, "radio", 5))
666                 phyidx = nl80211_phy_idx_from_uci(ifname);
667         else
668                 return NULL;
669 
670         memset(nif, 0, sizeof(nif));
671 
672         if (phyidx > -1)
673         {
674                 if ((d = opendir("/sys/class/net")) != NULL)
675                 {
676                         while ((e = readdir(d)) != NULL)
677                         {
678                                 snprintf(buffer, sizeof(buffer),
679                                          "/sys/class/net/%s/phy80211/index", e->d_name);
680 
681                                 if (nl80211_readint(buffer) == phyidx)
682                                 {
683                                         snprintf(buffer, sizeof(buffer),
684                                                  "/sys/class/net/%s/ifindex", e->d_name);
685 
686                                         if ((cifidx = nl80211_readint(buffer)) >= 0 &&
687                                             ((ifidx < 0) || (cifidx < ifidx)))
688                                         {
689                                                 ifidx = cifidx;
690                                                 strncpy(nif, e->d_name, sizeof(nif) - 1);
691                                         }
692                                 }
693                         }
694 
695                         closedir(d);
696                 }
697         }
698 
699         return nif[0] ? nif : NULL;
700 }
701 
702 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
703 {
704         int *mode = arg;
705         struct nlattr **tb = nl80211_parse(msg);
706         const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
707                 IWINFO_OPMODE_UNKNOWN,          /* unspecified */
708                 IWINFO_OPMODE_ADHOC,            /* IBSS */
709                 IWINFO_OPMODE_CLIENT,           /* managed */
710                 IWINFO_OPMODE_MASTER,           /* AP */
711                 IWINFO_OPMODE_AP_VLAN,          /* AP/VLAN */
712                 IWINFO_OPMODE_WDS,                      /* WDS */
713                 IWINFO_OPMODE_MONITOR,          /* monitor */
714                 IWINFO_OPMODE_MESHPOINT,        /* mesh point */
715                 IWINFO_OPMODE_P2P_CLIENT,       /* P2P-client */
716                 IWINFO_OPMODE_P2P_GO,           /* P2P-GO */
717         };
718 
719         if (tb[NL80211_ATTR_IFTYPE])
720                 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
721 
722         return NL_SKIP;
723 }
724 
725 
726 static int nl80211_get_mode(const char *ifname, int *buf)
727 {
728         char *res;
729 
730         *buf = IWINFO_OPMODE_UNKNOWN;
731 
732         res = nl80211_phy2ifname(ifname);
733 
734         nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
735                         nl80211_get_mode_cb, buf);
736 
737         return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
738 }
739 
740 static int __nl80211_hostapd_query(const char *ifname, ...)
741 {
742         va_list ap, ap_cur;
743         char *phy, *search, *dest, *key, *val, buf[128];
744         int len, mode, found = 0, match = 1;
745         FILE *fp;
746 
747         if (nl80211_get_mode(ifname, &mode))
748                 return 0;
749 
750         if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN)
751                 return 0;
752 
753         phy = nl80211_ifname2phy(ifname);
754 
755         if (!phy)
756                 return 0;
757 
758         snprintf(buf, sizeof(buf), "/var/run/hostapd-%s.conf", phy);
759         fp = fopen(buf, "r");
760 
761         if (!fp)
762                 return 0;
763 
764         va_start(ap, ifname);
765 
766         /* clear all destination buffers */
767         va_copy(ap_cur, ap);
768 
769         while ((search = va_arg(ap_cur, char *)) != NULL)
770         {
771                 dest = va_arg(ap_cur, char *);
772                 len  = va_arg(ap_cur, int);
773 
774                 memset(dest, 0, len);
775         }
776 
777         va_end(ap_cur);
778 
779         /* iterate applicable lines and copy found values into dest buffers */
780         while (fgets(buf, sizeof(buf), fp))
781         {
782                 key = strtok(buf, " =\t\n");
783                 val = strtok(NULL, "\n");
784 
785                 if (!key || !val || !*key || *key == '#')
786                         continue;
787 
788                 if (!strcmp(key, "interface") || !strcmp(key, "bss"))
789                         match = !strcmp(ifname, val);
790 
791                 if (!match)
792                         continue;
793 
794                 va_copy(ap_cur, ap);
795 
796                 while ((search = va_arg(ap_cur, char *)) != NULL)
797                 {
798                         dest = va_arg(ap_cur, char *);
799                         len  = va_arg(ap_cur, int);
800 
801                         if (!strcmp(search, key))
802                         {
803                                 strncpy(dest, val, len - 1);
804                                 found++;
805                                 break;
806                         }
807                 }
808 
809                 va_end(ap_cur);
810         }
811 
812         fclose(fp);
813 
814         va_end(ap);
815 
816         return found;
817 }
818 
819 #define nl80211_hostapd_query(ifname, ...) \
820         __nl80211_hostapd_query(ifname, ##__VA_ARGS__, NULL)
821 
822 
823 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
824 {
825         fd_set rfds;
826         struct timeval tv = { 0, 256000 };
827 
828         FD_ZERO(&rfds);
829         FD_SET(sock, &rfds);
830 
831         memset(buf, 0, blen);
832 
833         if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
834                 return -1;
835 
836         if (!FD_ISSET(sock, &rfds))
837                 return -1;
838 
839         return recv(sock, buf, blen - 1, 0);
840 }
841 
842 static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local)
843 {
844         struct sockaddr_un remote = { 0 };
845         size_t remote_length, local_length;
846 
847         int sock = socket(PF_UNIX, SOCK_DGRAM, 0);
848         if (sock < 0)
849                 return sock;
850 
851         remote.sun_family = AF_UNIX;
852         remote_length = sizeof(remote.sun_family) +
853                 sprintf(remote.sun_path, "/var/run/wpa_supplicant-%s/%s",
854                         ifname, ifname);
855 
856         if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
857         {
858                 close(sock);
859                 return -1;
860         }
861 
862         if (connect(sock, (struct sockaddr *)&remote, remote_length))
863         {
864                 remote_length = sizeof(remote.sun_family) +
865                         sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname);
866 
867                 if (connect(sock, (struct sockaddr *)&remote, remote_length))
868                 {
869                         close(sock);
870                         return -1;
871                 }
872         }
873 
874         local->sun_family = AF_UNIX;
875         local_length = sizeof(local->sun_family) +
876                 sprintf(local->sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
877 
878         if (bind(sock, (struct sockaddr *)local, local_length) < 0)
879         {
880                 close(sock);
881                 return -1;
882         }
883 
884         return sock;
885 }
886 
887 static int __nl80211_wpactl_query(const char *ifname, ...)
888 {
889         va_list ap, ap_cur;
890         struct sockaddr_un local = { 0 };
891         int len, mode, found = 0, sock = -1;
892         char *search, *dest, *key, *val, *line, *pos, buf[512];
893 
894         if (nl80211_get_mode(ifname, &mode))
895                 return 0;
896 
897         if (mode != IWINFO_OPMODE_CLIENT &&
898             mode != IWINFO_OPMODE_ADHOC &&
899             mode != IWINFO_OPMODE_MESHPOINT)
900                 return 0;
901 
902         sock = nl80211_wpactl_connect(ifname, &local);
903 
904         if (sock < 0)
905                 return 0;
906 
907         va_start(ap, ifname);
908 
909         /* clear all destination buffers */
910         va_copy(ap_cur, ap);
911 
912         while ((search = va_arg(ap_cur, char *)) != NULL)
913         {
914                 dest = va_arg(ap_cur, char *);
915                 len  = va_arg(ap_cur, int);
916 
917                 memset(dest, 0, len);
918         }
919 
920         va_end(ap_cur);
921 
922         send(sock, "STATUS", 6, 0);
923 
924         while (true)
925         {
926                 if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0)
927                         break;
928 
929                 if (buf[0] == '<')
930                         continue;
931 
932                 for (line = strtok_r(buf, "\n", &pos);
933                          line != NULL;
934                          line = strtok_r(NULL, "\n", &pos))
935                 {
936                         key = strtok(line, "=");
937                         val = strtok(NULL, "\n");
938 
939                         if (!key || !val)
940                                 continue;
941 
942                         va_copy(ap_cur, ap);
943 
944                         while ((search = va_arg(ap_cur, char *)) != NULL)
945                         {
946                                 dest = va_arg(ap_cur, char *);
947                                 len  = va_arg(ap_cur, int);
948 
949                                 if (!strcmp(search, key))
950                                 {
951                                         strncpy(dest, val, len - 1);
952                                         found++;
953                                         break;
954                                 }
955                         }
956 
957                         va_end(ap_cur);
958                 }
959 
960                 break;
961         }
962 
963         va_end(ap);
964 
965         close(sock);
966         unlink(local.sun_path);
967 
968         return found;
969 }
970 
971 #define nl80211_wpactl_query(ifname, ...) \
972         __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL)
973 
974 
975 static char * nl80211_ifadd(const char *ifname)
976 {
977         char path[PATH_MAX];
978         static char nif[IFNAMSIZ] = { 0 };
979         struct nl80211_msg_conveyor *req;
980         FILE *sysfs;
981 
982         req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
983         if (req)
984         {
985                 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
986 
987                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
988                 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
989 
990                 nl80211_send(req, NULL, NULL);
991 
992                 snprintf(path, sizeof(path) - 1,
993                          "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif);
994 
995                 if ((sysfs = fopen(path, "w")) != NULL)
996                 {
997                         fwrite("\n", 1, 2, sysfs);
998                         fclose(sysfs);
999                 }
1000 
1001                 return nif;
1002 
1003         nla_put_failure:
1004                 nl80211_free(req);
1005         }
1006 
1007         return NULL;
1008 }
1009 
1010 static void nl80211_ifdel(const char *ifname)
1011 {
1012         struct nl80211_msg_conveyor *req;
1013         int err;
1014 
1015         req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
1016         if (req)
1017         {
1018                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
1019 
1020                 nl80211_send(req, NULL, NULL);
1021                 return;
1022 
1023         nla_put_failure:
1024                 nl80211_free(req);
1025         }
1026 }
1027 
1028 static void nl80211_hostapd_hup(const char *ifname)
1029 {
1030         int fd, pid = 0;
1031         char buf[32];
1032         char *phy = nl80211_ifname2phy(ifname);
1033 
1034         if (phy)
1035         {
1036                 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
1037                 if ((fd = open(buf, O_RDONLY)) >= 0)
1038                 {
1039                         if (read(fd, buf, sizeof(buf)) > 0)
1040                                 pid = atoi(buf);
1041 
1042                         close(fd);
1043                 }
1044 
1045                 if (pid > 0)
1046                         kill(pid, 1);
1047         }
1048 }
1049 
1050 
1051 static int nl80211_probe(const char *ifname)
1052 {
1053         return !!nl80211_ifname2phy(ifname);
1054 }
1055 
1056 struct nl80211_ssid_bssid {
1057         unsigned char *ssid;
1058         unsigned char bssid[7];
1059 };
1060 
1061 static int nl80211_get_macaddr_cb(struct nl_msg *msg, void *arg)
1062 {
1063         struct nl80211_ssid_bssid *sb = arg;
1064         struct nlattr **tb = nl80211_parse(msg);
1065 
1066         if (tb[NL80211_ATTR_MAC]) {
1067                 sb->bssid[0] = 1;
1068                 memcpy(sb->bssid + 1, nla_data(tb[NL80211_ATTR_MAC]),
1069                        sizeof(sb->bssid) - 1);
1070         }
1071 
1072         return NL_SKIP;
1073 }
1074 
1075 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
1076 {
1077         int ielen;
1078         unsigned char *ie;
1079         struct nl80211_ssid_bssid *sb = arg;
1080         struct nlattr **tb = nl80211_parse(msg);
1081         struct nlattr *bss[NL80211_BSS_MAX + 1];
1082 
1083         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1084                 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
1085                 [NL80211_BSS_STATUS]               = { .type = NLA_U32 },
1086         };
1087 
1088         if (!tb[NL80211_ATTR_BSS] ||
1089             nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1090                              bss_policy) ||
1091             !bss[NL80211_BSS_BSSID] ||
1092             !bss[NL80211_BSS_STATUS] ||
1093             !bss[NL80211_BSS_INFORMATION_ELEMENTS])
1094         {
1095                 return NL_SKIP;
1096         }
1097 
1098         switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
1099         {
1100         case NL80211_BSS_STATUS_ASSOCIATED:
1101         case NL80211_BSS_STATUS_AUTHENTICATED:
1102         case NL80211_BSS_STATUS_IBSS_JOINED:
1103 
1104                 if (sb->ssid)
1105                 {
1106                         ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1107                         ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1108 
1109                         while (ielen >= 2 && ielen >= ie[1])
1110                         {
1111                                 if (ie[0] == 0)
1112                                 {
1113                                         memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1114                                         return NL_SKIP;
1115                                 }
1116 
1117                                 ielen -= ie[1] + 2;
1118                                 ie += ie[1] + 2;
1119                         }
1120                 }
1121                 else
1122                 {
1123                         sb->bssid[0] = 1;
1124                         memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
1125                         return NL_SKIP;
1126                 }
1127 
1128         default:
1129                 return NL_SKIP;
1130         }
1131 }
1132 
1133 static int nl80211_get_ssid(const char *ifname, char *buf)
1134 {
1135         char *res;
1136         struct nl80211_ssid_bssid sb = { .ssid = (unsigned char *)buf };
1137 
1138         /* try to find ssid from scan dump results */
1139         res = nl80211_phy2ifname(ifname);
1140         sb.ssid[0] = 0;
1141 
1142         nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1143                         nl80211_get_ssid_bssid_cb, &sb);
1144 
1145         /* failed, try to find from hostapd info */
1146         if (sb.ssid[0] == 0)
1147                 nl80211_hostapd_query(ifname, "ssid", sb.ssid,
1148                                       IWINFO_ESSID_MAX_SIZE + 1);
1149 
1150         /* failed, try to obtain Mesh ID */
1151         if (sb.ssid[0] == 0)
1152                 iwinfo_ubus_query(res ? res : ifname, "mesh_id",
1153                                   sb.ssid, IWINFO_ESSID_MAX_SIZE + 1);
1154 
1155         return (sb.ssid[0] == 0) ? -1 : 0;
1156 }
1157 
1158 static int nl80211_get_bssid(const char *ifname, char *buf)
1159 {
1160         char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")];
1161         struct nl80211_ssid_bssid sb = { };
1162 
1163         res = nl80211_phy2ifname(ifname);
1164 
1165         /* try to obtain mac address via NL80211_CMD_GET_INTERFACE */
1166         nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1167                         nl80211_get_macaddr_cb, &sb);
1168 
1169         /* failed, try to find bssid from scan dump results */
1170         if (sb.bssid[0] == 0)
1171                 nl80211_request(res ? res : ifname,
1172                                 NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1173                                 nl80211_get_ssid_bssid_cb, &sb);
1174 
1175         /* failed, try to find mac from hostapd info */
1176         if ((sb.bssid[0] == 0) &&
1177             nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid)))
1178         {
1179                 sb.bssid[0] = 1;
1180                 sb.bssid[1] = strtol(&bssid[0],  NULL, 16);
1181                 sb.bssid[2] = strtol(&bssid[3],  NULL, 16);
1182                 sb.bssid[3] = strtol(&bssid[6],  NULL, 16);
1183                 sb.bssid[4] = strtol(&bssid[9],  NULL, 16);
1184                 sb.bssid[5] = strtol(&bssid[12], NULL, 16);
1185                 sb.bssid[6] = strtol(&bssid[15], NULL, 16);
1186         }
1187 
1188         if (sb.bssid[0])
1189         {
1190                 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
1191                         sb.bssid[1], sb.bssid[2], sb.bssid[3],
1192                         sb.bssid[4], sb.bssid[5], sb.bssid[6]);
1193 
1194                 return 0;
1195         }
1196 
1197         return -1;
1198 }
1199 
1200 
1201 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
1202 {
1203         int *freq = arg;
1204         struct nlattr **attr = nl80211_parse(msg);
1205         struct nlattr *binfo[NL80211_BSS_MAX + 1];
1206 
1207         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1208                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1209                 [NL80211_BSS_STATUS]    = { .type = NLA_U32 },
1210         };
1211 
1212         if (attr[NL80211_ATTR_BSS] &&
1213             !nla_parse_nested(binfo, NL80211_BSS_MAX,
1214                               attr[NL80211_ATTR_BSS], bss_policy))
1215         {
1216                 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
1217                         *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
1218         }
1219 
1220         return NL_SKIP;
1221 }
1222 
1223 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
1224 {
1225         int *freq = arg;
1226         struct nlattr **tb = nl80211_parse(msg);
1227 
1228         if (tb[NL80211_ATTR_WIPHY_FREQ])
1229                 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
1230 
1231         return NL_SKIP;
1232 }
1233 
1234 static int nl80211_get_frequency(const char *ifname, int *buf)
1235 {
1236         char *res, channel[4], hwmode[3];
1237 
1238         /* try to find frequency from interface info */
1239         res = nl80211_phy2ifname(ifname);
1240         *buf = 0;
1241 
1242         nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1243                         nl80211_get_frequency_info_cb, buf);
1244 
1245         /* failed, try to find frequency from hostapd info */
1246         if ((*buf == 0) &&
1247             nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode),
1248                                           "channel", channel, sizeof(channel)) == 2)
1249         {
1250                 *buf = nl80211_channel2freq(atoi(channel), hwmode);
1251         }
1252 
1253         /* failed, try to find frequency from scan results */
1254         if (*buf == 0)
1255         {
1256                 res = nl80211_phy2ifname(ifname);
1257 
1258                 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1259                                 nl80211_get_frequency_scan_cb, buf);
1260         }
1261 
1262         return (*buf == 0) ? -1 : 0;
1263 }
1264 
1265 static int nl80211_get_channel(const char *ifname, int *buf)
1266 {
1267         if (!nl80211_get_frequency(ifname, buf))
1268         {
1269                 *buf = nl80211_freq2channel(*buf);
1270                 return 0;
1271         }
1272 
1273         return -1;
1274 }
1275 
1276 static int nl80211_get_txpower_cb(struct nl_msg *msg, void *arg)
1277 {
1278         int *buf = arg;
1279         struct nlattr **tb = nl80211_parse(msg);
1280 
1281         if (tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL])
1282                 *buf = iwinfo_mbm2dbm(nla_get_u32(tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL]));
1283 
1284         return NL_SKIP;
1285 }
1286 
1287 static int nl80211_get_txpower(const char *ifname, int *buf)
1288 {
1289         char *res;
1290 
1291         res = nl80211_phy2ifname(ifname);
1292         *buf = 0;
1293 
1294         if (nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1295                             nl80211_get_txpower_cb, buf))
1296                 return -1;
1297 
1298         return 0;
1299 }
1300 
1301 
1302 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1303 {
1304         int8_t dbm;
1305         int16_t mbit;
1306         struct nl80211_rssi_rate *rr = arg;
1307         struct nlattr **attr = nl80211_parse(msg);
1308         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1309         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1310 
1311         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1312                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
1313                 [NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
1314                 [NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
1315                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
1316                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
1317                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
1318                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
1319                 [NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
1320                 [NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
1321                 [NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
1322         };
1323 
1324         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1325                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16  },
1326                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8   },
1327                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1328                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG },
1329         };
1330 
1331         if (attr[NL80211_ATTR_STA_INFO])
1332         {
1333                 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1334                                       attr[NL80211_ATTR_STA_INFO], stats_policy))
1335                 {
1336                         if (sinfo[NL80211_STA_INFO_SIGNAL])
1337                         {
1338                                 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1339                                 rr->rssi = (rr->rssi * rr->rssi_samples + dbm) / (rr->rssi_samples + 1);
1340                                 rr->rssi_samples++;
1341                         }
1342 
1343                         if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1344                         {
1345                                 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1346                                                       sinfo[NL80211_STA_INFO_TX_BITRATE],
1347                                                       rate_policy))
1348                                 {
1349                                         if (rinfo[NL80211_RATE_INFO_BITRATE])
1350                                         {
1351                                                 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1352                                                 rr->rate = (rr->rate * rr->rate_samples + mbit) / (rr->rate_samples + 1);
1353                                                 rr->rate_samples++;
1354                                         }
1355                                 }
1356                         }
1357                 }
1358         }
1359 
1360         return NL_SKIP;
1361 }
1362 
1363 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1364 {
1365         DIR *d;
1366         struct dirent *de;
1367 
1368         memset(r, 0, sizeof(*r));
1369 
1370         if ((d = opendir("/sys/class/net")) != NULL)
1371         {
1372                 while ((de = readdir(d)) != NULL)
1373                 {
1374                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1375                             (!de->d_name[strlen(ifname)] ||
1376                              !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1377                         {
1378                                 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
1379                                                 NLM_F_DUMP, nl80211_fill_signal_cb, r);
1380                         }
1381                 }
1382 
1383                 closedir(d);
1384         }
1385 }
1386 
1387 static int nl80211_get_bitrate(const char *ifname, int *buf)
1388 {
1389         struct nl80211_rssi_rate rr;
1390 
1391         nl80211_fill_signal(ifname, &rr);
1392 
1393         if (rr.rate_samples)
1394         {
1395                 *buf = (rr.rate * 100);
1396                 return 0;
1397         }
1398 
1399         return -1;
1400 }
1401 
1402 static int nl80211_get_signal(const char *ifname, int *buf)
1403 {
1404         struct nl80211_rssi_rate rr;
1405 
1406         nl80211_fill_signal(ifname, &rr);
1407 
1408         if (rr.rssi_samples)
1409         {
1410                 *buf = rr.rssi;
1411                 return 0;
1412         }
1413 
1414         return -1;
1415 }
1416 
1417 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1418 {
1419         int8_t *noise = arg;
1420         struct nlattr **tb = nl80211_parse(msg);
1421         struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1422 
1423         static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1424                 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1425                 [NL80211_SURVEY_INFO_NOISE]     = { .type = NLA_U8  },
1426         };
1427 
1428         if (!tb[NL80211_ATTR_SURVEY_INFO])
1429                 return NL_SKIP;
1430 
1431         if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1432                              tb[NL80211_ATTR_SURVEY_INFO], sp))
1433                 return NL_SKIP;
1434 
1435         if (!si[NL80211_SURVEY_INFO_NOISE])
1436                 return NL_SKIP;
1437 
1438         if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1439                 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1440 
1441         return NL_SKIP;
1442 }
1443 
1444 
1445 static int nl80211_get_noise(const char *ifname, int *buf)
1446 {
1447         int8_t noise = 0;
1448 
1449         if (nl80211_request(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP,
1450                             nl80211_get_noise_cb, &noise))
1451                 goto out;
1452 
1453         *buf = noise;
1454         return 0;
1455 
1456 out:
1457         *buf = 0;
1458         return -1;
1459 }
1460 
1461 static int nl80211_get_quality(const char *ifname, int *buf)
1462 {
1463         int signal;
1464 
1465         if (!nl80211_get_signal(ifname, &signal))
1466         {
1467                 /* A positive signal level is usually just a quality
1468                  * value, pass through as-is */
1469                 if (signal >= 0)
1470                 {
1471                         *buf = signal;
1472                 }
1473 
1474                 /* The cfg80211 wext compat layer assumes a signal range
1475                  * of -110 dBm to -40 dBm, the quality value is derived
1476                  * by adding 110 to the signal level */
1477                 else
1478                 {
1479                         if (signal < -110)
1480                                 signal = -110;
1481                         else if (signal > -40)
1482                                 signal = -40;
1483 
1484                         *buf = (signal + 110);
1485                 }
1486 
1487                 return 0;
1488         }
1489 
1490         return -1;
1491 }
1492 
1493 static int nl80211_get_quality_max(const char *ifname, int *buf)
1494 {
1495         /* The cfg80211 wext compat layer assumes a maximum
1496          * quality of 70 */
1497         *buf = 70;
1498 
1499         return 0;
1500 }
1501 
1502 static int nl80211_check_wepkey(const char *key)
1503 {
1504         if (key && *key)
1505         {
1506                 switch (strlen(key))
1507                 {
1508                 case 5:
1509                 case 10:
1510                         return IWINFO_CIPHER_WEP40;
1511 
1512                 case 13:
1513                 case 26:
1514                         return IWINFO_CIPHER_WEP104;
1515                 }
1516         }
1517 
1518         return 0;
1519 }
1520 
1521 static struct {
1522         const char *match;
1523         int version;
1524         int suite;
1525 } wpa_key_mgmt_strings[] = {
1526         { "IEEE 802.1X/EAP", 0, IWINFO_KMGMT_8021x },
1527         { "EAP-SUITE-B-192", 4, IWINFO_KMGMT_8021x },
1528         { "EAP-SUITE-B",     4, IWINFO_KMGMT_8021x },
1529         { "EAP-SHA256",      0, IWINFO_KMGMT_8021x },
1530         { "PSK-SHA256",      0, IWINFO_KMGMT_PSK },
1531         { "NONE",            0, IWINFO_KMGMT_NONE },
1532         { "None",            0, IWINFO_KMGMT_NONE },
1533         { "PSK",             0, IWINFO_KMGMT_PSK },
1534         { "EAP",             0, IWINFO_KMGMT_8021x },
1535         { "SAE",             4, IWINFO_KMGMT_SAE },
1536         { "OWE",             4, IWINFO_KMGMT_OWE }
1537 };
1538 
1539 static void parse_wpa_suites(const char *str, int defversion,
1540                              uint8_t *versions, uint8_t *suites)
1541 {
1542         size_t l;
1543         int i, version;
1544         const char *p, *q, *m, *sep = " \t\n,-+/";
1545 
1546         for (p = str; *p; )
1547         {
1548                 q = p;
1549 
1550                 for (i = 0; i < ARRAY_SIZE(wpa_key_mgmt_strings); i++)
1551                 {
1552                         m = wpa_key_mgmt_strings[i].match;
1553                         l = strlen(m);
1554 
1555                         if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l])))
1556                         {
1557                                 if (wpa_key_mgmt_strings[i].version != 0)
1558                                         version = wpa_key_mgmt_strings[i].version;
1559                                 else
1560                                         version = defversion;
1561 
1562                                 *versions |= version;
1563                                 *suites |= wpa_key_mgmt_strings[i].suite;
1564 
1565                                 q += l;
1566                                 break;
1567                         }
1568                 }
1569 
1570                 if (q == p)
1571                         q += strcspn(q, sep);
1572 
1573                 p = q + strspn(q, sep);
1574         }
1575 }
1576 
1577 static struct {
1578         const char *match;
1579         int cipher;
1580 } wpa_cipher_strings[] = {
1581         { "WEP-104", IWINFO_CIPHER_WEP104 },
1582         { "WEP-40",  IWINFO_CIPHER_WEP40 },
1583         { "NONE",    IWINFO_CIPHER_NONE },
1584         { "TKIP",    IWINFO_CIPHER_TKIP },
1585         { "CCMP",    IWINFO_CIPHER_CCMP }
1586 };
1587 
1588 static void parse_wpa_ciphers(const char *str, uint8_t *ciphers)
1589 {
1590         int i;
1591         size_t l;
1592         const char *m, *p, *q, *sep = " \t\n,-+/";
1593 
1594         for (p = str; *p; )
1595         {
1596                 q = p;
1597 
1598                 for (i = 0; i < ARRAY_SIZE(wpa_cipher_strings); i++)
1599                 {
1600                         m = wpa_cipher_strings[i].match;
1601                         l = strlen(m);
1602 
1603                         if (!strncmp(q, m, l) && (!q[l] || strchr(sep, q[l])))
1604                         {
1605                                 *ciphers |= wpa_cipher_strings[i].cipher;
1606 
1607                                 q += l;
1608                                 break;
1609                         }
1610                 }
1611 
1612                 if (q == p)
1613                         q += strcspn(q, sep);
1614 
1615                 p = q + strspn(q, sep);
1616         }
1617 }
1618 
1619 static int nl80211_get_encryption(const char *ifname, char *buf)
1620 {
1621         char *p;
1622         int opmode;
1623         uint8_t wpa_version = 0;
1624         char wpa[2], wpa_key_mgmt[64], wpa_pairwise[16], wpa_groupwise[16];
1625         char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27];
1626         char mode[16];
1627 
1628         struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1629 
1630         /* WPA supplicant */
1631         if (nl80211_wpactl_query(ifname,
1632                         "pairwise_cipher", wpa_pairwise,  sizeof(wpa_pairwise),
1633                         "group_cipher",    wpa_groupwise, sizeof(wpa_groupwise),
1634                         "key_mgmt",        wpa_key_mgmt,  sizeof(wpa_key_mgmt),
1635                         "mode",            mode,          sizeof(mode)))
1636         {
1637                 /* WEP or Open */
1638                 if (!strcmp(wpa_key_mgmt, "NONE"))
1639                 {
1640                         parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1641                         parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers);
1642 
1643                         if (c->pair_ciphers != 0 && c->pair_ciphers != IWINFO_CIPHER_NONE) {
1644                                 c->enabled     = 1;
1645                                 c->auth_suites = IWINFO_KMGMT_NONE;
1646                                 c->auth_algs   = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1647                         }
1648                         else {
1649                                 c->pair_ciphers = 0;
1650                                 c->group_ciphers = 0;
1651                         }
1652                 }
1653 
1654                 /* MESH with SAE */
1655                 else if (!strcmp(mode, "mesh") && !strcmp(wpa_key_mgmt, "UNKNOWN"))
1656                 {
1657                         c->enabled = 1;
1658                         c->wpa_version = 4;
1659                         c->auth_suites = IWINFO_KMGMT_SAE;
1660                         c->pair_ciphers = IWINFO_CIPHER_CCMP;
1661                         c->group_ciphers = IWINFO_CIPHER_CCMP;
1662                 }
1663 
1664                 /* WPA */
1665                 else
1666                 {
1667                         parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1668                         parse_wpa_ciphers(wpa_groupwise, &c->group_ciphers);
1669 
1670                         p = wpa_key_mgmt;
1671 
1672                         if (!strncmp(p, "WPA2-", 5) || !strncmp(p, "WPA2/", 5))
1673                         {
1674                                 p += 5;
1675                                 wpa_version = 2;
1676                         }
1677                         else if (!strncmp(p, "WPA-", 4))
1678                         {
1679                                 p += 4;
1680                                 wpa_version = 1;
1681                         }
1682 
1683                         parse_wpa_suites(p, wpa_version, &c->wpa_version, &c->auth_suites);
1684 
1685                         c->enabled = !!(c->wpa_version && c->auth_suites);
1686                 }
1687 
1688                 return 0;
1689         }
1690 
1691         /* Hostapd */
1692         else if (nl80211_hostapd_query(ifname,
1693                                 "wpa",          wpa,          sizeof(wpa),
1694                                 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1695                                 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise),
1696                                 "auth_algs",    auth_algs,    sizeof(auth_algs),
1697                                 "wep_key0",     wep_key0,     sizeof(wep_key0),
1698                                 "wep_key1",     wep_key1,     sizeof(wep_key1),
1699                                 "wep_key2",     wep_key2,     sizeof(wep_key2),
1700                                 "wep_key3",     wep_key3,     sizeof(wep_key3)))
1701         {
1702                 c->wpa_version = 0;
1703 
1704                 if (wpa_key_mgmt[0])
1705                 {
1706                         for (p = strtok(wpa_key_mgmt, " \t"); p != NULL; p = strtok(NULL, " \t"))
1707                         {
1708                                 if (!strncmp(p, "WPA-", 4))
1709                                         p += 4;
1710 
1711                                 parse_wpa_suites(p, atoi(wpa), &c->wpa_version, &c->auth_suites);
1712                         }
1713 
1714                         c->enabled = c->wpa_version ? 1 : 0;
1715                 }
1716 
1717                 if (wpa_pairwise[0])
1718                         parse_wpa_ciphers(wpa_pairwise, &c->pair_ciphers);
1719 
1720                 if (auth_algs[0])
1721                 {
1722                         switch (atoi(auth_algs))
1723                         {
1724                         case 1:
1725                                 c->auth_algs |= IWINFO_AUTH_OPEN;
1726                                 break;
1727 
1728                         case 2:
1729                                 c->auth_algs |= IWINFO_AUTH_SHARED;
1730                                 break;
1731 
1732                         case 3:
1733                                 c->auth_algs |= IWINFO_AUTH_OPEN;
1734                                 c->auth_algs |= IWINFO_AUTH_SHARED;
1735                                 break;
1736                         }
1737 
1738                         c->pair_ciphers |= nl80211_check_wepkey(wep_key0);
1739                         c->pair_ciphers |= nl80211_check_wepkey(wep_key1);
1740                         c->pair_ciphers |= nl80211_check_wepkey(wep_key2);
1741                         c->pair_ciphers |= nl80211_check_wepkey(wep_key3);
1742 
1743                         c->enabled = (c->auth_algs && c->pair_ciphers) ? 1 : 0;
1744                 }
1745 
1746                 c->group_ciphers = c->pair_ciphers;
1747 
1748                 return 0;
1749         }
1750 
1751         /* Ad-Hoc or Mesh interfaces without wpa_supplicant are open */
1752         else if (!nl80211_get_mode(ifname, &opmode) &&
1753                  (opmode == IWINFO_OPMODE_ADHOC ||
1754                   opmode == IWINFO_OPMODE_MESHPOINT))
1755         {
1756                 c->enabled = 0;
1757 
1758                 return 0;
1759         }
1760 
1761 
1762         return -1;
1763 }
1764 
1765 static int nl80211_get_phyname(const char *ifname, char *buf)
1766 {
1767         const char *name;
1768 
1769         name = nl80211_ifname2phy(ifname);
1770 
1771         if (name)
1772         {
1773                 strcpy(buf, name);
1774                 return 0;
1775         }
1776         else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1777         {
1778                 name = nl80211_ifname2phy(name);
1779 
1780                 if (name)
1781                 {
1782                         strcpy(buf, ifname);
1783                         return 0;
1784                 }
1785         }
1786 
1787         return -1;
1788 }
1789 
1790 
1791 static void nl80211_parse_rateinfo(struct nlattr **ri,
1792                                    struct iwinfo_rate_entry *re)
1793 {
1794         if (ri[NL80211_RATE_INFO_BITRATE32])
1795                 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100;
1796         else if (ri[NL80211_RATE_INFO_BITRATE])
1797                 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100;
1798 
1799         if (ri[NL80211_RATE_INFO_VHT_MCS])
1800         {
1801                 re->is_vht = 1;
1802                 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]);
1803 
1804                 if (ri[NL80211_RATE_INFO_VHT_NSS])
1805                         re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]);
1806         }
1807         else if (ri[NL80211_RATE_INFO_MCS])
1808         {
1809                 re->is_ht = 1;
1810                 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]);
1811         }
1812 
1813         if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH])
1814                 re->mhz = 5;
1815         else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH])
1816                 re->mhz = 10;
1817         else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH])
1818                 re->mhz = 40;
1819         else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH])
1820                 re->mhz = 80;
1821         else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] ||
1822                  ri[NL80211_RATE_INFO_160_MHZ_WIDTH])
1823                 re->mhz = 160;
1824         else
1825                 re->mhz = 20;
1826 
1827         if (ri[NL80211_RATE_INFO_SHORT_GI])
1828                 re->is_short_gi = 1;
1829 
1830         re->is_40mhz = (re->mhz == 40);
1831 }
1832 
1833 static int nl80211_get_survey_cb(struct nl_msg *msg, void *arg)
1834 {
1835         struct nl80211_array_buf *arr = arg;
1836         struct iwinfo_survey_entry *e = arr->buf;
1837         struct nlattr **attr = nl80211_parse(msg);
1838         struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
1839         int rc;
1840 
1841         static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
1842                 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1843                 [NL80211_SURVEY_INFO_NOISE]  = { .type = NLA_U8     },
1844                 [NL80211_SURVEY_INFO_TIME] = { .type = NLA_U64   },
1845                 [NL80211_SURVEY_INFO_TIME_BUSY] = { .type = NLA_U64   },
1846                 [NL80211_SURVEY_INFO_TIME_EXT_BUSY] = { .type = NLA_U64   },
1847                 [NL80211_SURVEY_INFO_TIME_RX] = { .type = NLA_U64   },
1848                 [NL80211_SURVEY_INFO_TIME_TX] = { .type = NLA_U64   },
1849         };
1850 
1851         rc = nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
1852                                 attr[NL80211_ATTR_SURVEY_INFO],
1853                                 survey_policy);
1854         if (rc)
1855                 return NL_SKIP;
1856 
1857         /* advance to end of array */
1858         e += arr->count;
1859         memset(e, 0, sizeof(*e));
1860 
1861         if (sinfo[NL80211_SURVEY_INFO_FREQUENCY])
1862                 e->mhz = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]);
1863 
1864         if (sinfo[NL80211_SURVEY_INFO_NOISE])
1865                 e->noise = nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
1866 
1867         if (sinfo[NL80211_SURVEY_INFO_TIME])
1868                 e->active_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME]);
1869 
1870         if (sinfo[NL80211_SURVEY_INFO_TIME_BUSY])
1871                 e->busy_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_BUSY]);
1872 
1873         if (sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY])
1874                 e->busy_time_ext = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]);
1875 
1876         if (sinfo[NL80211_SURVEY_INFO_TIME_RX])
1877                 e->rxtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_RX]);
1878 
1879         if (sinfo[NL80211_SURVEY_INFO_TIME_TX])
1880                 e->txtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_TX]);
1881 
1882         arr->count++;
1883         return NL_SKIP;
1884 }
1885 
1886 
1887 static void plink_state_to_str(char *dst, unsigned state)
1888 {
1889         switch (state) {
1890         case NL80211_PLINK_LISTEN:
1891                 strcpy(dst, "LISTEN");
1892                 break;
1893         case NL80211_PLINK_OPN_SNT:
1894                 strcpy(dst, "OPN_SNT");
1895                 break;
1896         case NL80211_PLINK_OPN_RCVD:
1897                 strcpy(dst, "OPN_RCVD");
1898                 break;
1899         case NL80211_PLINK_CNF_RCVD:
1900                 strcpy(dst, "CNF_RCVD");
1901                 break;
1902         case NL80211_PLINK_ESTAB:
1903                 strcpy(dst, "ESTAB");
1904                 break;
1905         case NL80211_PLINK_HOLDING:
1906                 strcpy(dst, "HOLDING");
1907                 break;
1908         case NL80211_PLINK_BLOCKED:
1909                 strcpy(dst, "BLOCKED");
1910                 break;
1911         default:
1912                 strcpy(dst, "UNKNOWN");
1913                 break;
1914         }
1915 }
1916 
1917 static void power_mode_to_str(char *dst, struct nlattr *a)
1918 {
1919         enum nl80211_mesh_power_mode pm = nla_get_u32(a);
1920 
1921         switch (pm) {
1922         case NL80211_MESH_POWER_ACTIVE:
1923                 strcpy(dst, "ACTIVE");
1924                 break;
1925         case NL80211_MESH_POWER_LIGHT_SLEEP:
1926                 strcpy(dst, "LIGHT SLEEP");
1927                 break;
1928         case NL80211_MESH_POWER_DEEP_SLEEP:
1929                 strcpy(dst, "DEEP SLEEP");
1930                 break;
1931         default:
1932                 strcpy(dst, "UNKNOWN");
1933                 break;
1934         }
1935 }
1936 
1937 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1938 {
1939         struct nl80211_array_buf *arr = arg;
1940         struct iwinfo_assoclist_entry *e = arr->buf;
1941         struct nlattr **attr = nl80211_parse(msg);
1942         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1943         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1944         struct nl80211_sta_flag_update *sta_flags;
1945 
1946         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1947                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
1948                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
1949                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
1950                 [NL80211_STA_INFO_RX_BITRATE]    = { .type = NLA_NESTED },
1951                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
1952                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
1953                 [NL80211_STA_INFO_SIGNAL_AVG]    = { .type = NLA_U8     },
1954                 [NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
1955                 [NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
1956                 [NL80211_STA_INFO_TX_RETRIES]    = { .type = NLA_U32    },
1957                 [NL80211_STA_INFO_TX_FAILED]     = { .type = NLA_U32    },
1958                 [NL80211_STA_INFO_CONNECTED_TIME]= { .type = NLA_U32    },
1959                 [NL80211_STA_INFO_RX_DROP_MISC]  = { .type = NLA_U64    },
1960                 [NL80211_STA_INFO_T_OFFSET]      = { .type = NLA_U64    },
1961                 [NL80211_STA_INFO_STA_FLAGS] =
1962                         { .minlen = sizeof(struct nl80211_sta_flag_update) },
1963                 [NL80211_STA_INFO_EXPECTED_THROUGHPUT]   = { .type = NLA_U32    },
1964                 /* mesh */
1965                 [NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
1966                 [NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
1967                 [NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
1968                 [NL80211_STA_INFO_LOCAL_PM]      = { .type = NLA_U32    },
1969                 [NL80211_STA_INFO_PEER_PM]       = { .type = NLA_U32    },
1970                 [NL80211_STA_INFO_NONPEER_PM]    = { .type = NLA_U32    },
1971         };
1972 
1973         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1974                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16    },
1975                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8     },
1976                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG   },
1977                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG   },
1978         };
1979 
1980         /* advance to end of array */
1981         e += arr->count;
1982         memset(e, 0, sizeof(*e));
1983 
1984         if (attr[NL80211_ATTR_MAC])
1985                 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1986 
1987         if (attr[NL80211_ATTR_STA_INFO] &&
1988             !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1989                               attr[NL80211_ATTR_STA_INFO], stats_policy))
1990         {
1991                 if (sinfo[NL80211_STA_INFO_SIGNAL])
1992                         e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1993 
1994                 if (sinfo[NL80211_STA_INFO_SIGNAL_AVG])
1995                         e->signal_avg = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]);
1996 
1997                 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1998                         e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1999 
2000                 if (sinfo[NL80211_STA_INFO_CONNECTED_TIME])
2001                         e->connected_time = nla_get_u32(sinfo[NL80211_STA_INFO_CONNECTED_TIME]);
2002 
2003                 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
2004                         e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
2005 
2006                 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
2007                         e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
2008 
2009                 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
2010                     !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
2011                                       sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
2012                         nl80211_parse_rateinfo(rinfo, &e->rx_rate);
2013 
2014                 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
2015                     !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
2016                                       sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
2017                         nl80211_parse_rateinfo(rinfo, &e->tx_rate);
2018 
2019                 if (sinfo[NL80211_STA_INFO_RX_BYTES])
2020                         e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
2021 
2022                 if (sinfo[NL80211_STA_INFO_TX_BYTES])
2023                         e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
2024 
2025                 if (sinfo[NL80211_STA_INFO_TX_RETRIES])
2026                         e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
2027 
2028                 if (sinfo[NL80211_STA_INFO_TX_FAILED])
2029                         e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
2030 
2031                 if (sinfo[NL80211_STA_INFO_T_OFFSET])
2032                         e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]);
2033 
2034                 if (sinfo[NL80211_STA_INFO_RX_DROP_MISC])
2035                         e->rx_drop_misc = nla_get_u64(sinfo[NL80211_STA_INFO_RX_DROP_MISC]);
2036 
2037                 if (sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT])
2038                         e->thr = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]);
2039 
2040                 /* mesh */
2041                 if (sinfo[NL80211_STA_INFO_LLID])
2042                         e->llid = nla_get_u16(sinfo[NL80211_STA_INFO_LLID]);
2043 
2044                 if (sinfo[NL80211_STA_INFO_PLID])
2045                         e->plid = nla_get_u16(sinfo[NL80211_STA_INFO_PLID]);
2046 
2047                 if (sinfo[NL80211_STA_INFO_PLINK_STATE])
2048                         plink_state_to_str(e->plink_state,
2049                                 nla_get_u8(sinfo[NL80211_STA_INFO_PLINK_STATE]));
2050 
2051                 if (sinfo[NL80211_STA_INFO_LOCAL_PM])
2052                         power_mode_to_str(e->local_ps, sinfo[NL80211_STA_INFO_LOCAL_PM]);
2053                 if (sinfo[NL80211_STA_INFO_PEER_PM])
2054                         power_mode_to_str(e->peer_ps, sinfo[NL80211_STA_INFO_PEER_PM]);
2055                 if (sinfo[NL80211_STA_INFO_NONPEER_PM])
2056                         power_mode_to_str(e->nonpeer_ps, sinfo[NL80211_STA_INFO_NONPEER_PM]);
2057 
2058                 /* Station flags */
2059                 if (sinfo[NL80211_STA_INFO_STA_FLAGS])
2060                 {
2061                         sta_flags = (struct nl80211_sta_flag_update *)
2062                                 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
2063 
2064                         if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
2065                             sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
2066                                 e->is_authorized = 1;
2067 
2068                         if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
2069                             sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
2070                                 e->is_authenticated = 1;
2071 
2072                         if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
2073                             sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
2074                                 e->is_preamble_short = 1;
2075 
2076                         if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
2077                             sta_flags->set & BIT(NL80211_STA_FLAG_WME))
2078                                 e->is_wme = 1;
2079 
2080                         if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
2081                             sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
2082                                 e->is_mfp = 1;
2083 
2084                         if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
2085                             sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2086                                 e->is_tdls = 1;
2087                 }
2088         }
2089 
2090         e->noise = 0; /* filled in by caller */
2091         arr->count++;
2092 
2093         return NL_SKIP;
2094 }
2095 
2096 static int nl80211_get_survey(const char *ifname, char *buf, int *len)
2097 {
2098         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2099         int rc;
2100 
2101         rc = nl80211_request(ifname, NL80211_CMD_GET_SURVEY,
2102                         NLM_F_DUMP, nl80211_get_survey_cb, &arr);
2103         if (!rc)
2104                 *len = (arr.count * sizeof(struct iwinfo_survey_entry));
2105         else
2106                 *len = 0;
2107 
2108         return 0;
2109 }
2110 
2111 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
2112 {
2113         DIR *d;
2114         int i, noise = 0;
2115         struct dirent *de;
2116         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2117         struct iwinfo_assoclist_entry *e;
2118 
2119         if ((d = opendir("/sys/class/net")) != NULL)
2120         {
2121                 while ((de = readdir(d)) != NULL)
2122                 {
2123                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
2124                             (!de->d_name[strlen(ifname)] ||
2125                              !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
2126                         {
2127                                 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
2128                                                 NLM_F_DUMP, nl80211_get_assoclist_cb, &arr);
2129                         }
2130                 }
2131 
2132                 closedir(d);
2133 
2134                 if (!nl80211_get_noise(ifname, &noise))
2135                         for (i = 0, e = arr.buf; i < arr.count; i++, e++)
2136                                 e->noise = noise;
2137 
2138                 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
2139                 return 0;
2140         }
2141 
2142         return -1;
2143 }
2144 
2145 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
2146 {
2147         int *dbm_max = arg;
2148         int ch_cur, ch_cmp, bands_remain, freqs_remain;
2149 
2150         struct nlattr **attr = nl80211_parse(msg);
2151         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2152         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2153         struct nlattr *band, *freq;
2154 
2155         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2156                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
2157                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
2158                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2159                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
2160                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
2161                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
2162         };
2163 
2164         ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
2165         *dbm_max = -1;
2166 
2167         nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2168         {
2169                 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
2170                           nla_len(band), NULL);
2171 
2172                 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2173                 {
2174                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2175                                   nla_data(freq), nla_len(freq), freq_policy);
2176 
2177                         ch_cmp = nl80211_freq2channel(nla_get_u32(
2178                                 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
2179 
2180                         if ((!ch_cur || (ch_cmp == ch_cur)) &&
2181                             freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
2182                         {
2183                                 *dbm_max = (int)(0.01 * nla_get_u32(
2184                                         freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
2185 
2186                                 break;
2187                         }
2188                 }
2189         }
2190 
2191         return NL_SKIP;
2192 }
2193 
2194 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
2195 {
2196         int err, ch_cur;
2197         int dbm_max = -1, dbm_cur, dbm_cnt;
2198         struct nl80211_msg_conveyor *req;
2199         struct iwinfo_txpwrlist_entry entry;
2200 
2201         if (nl80211_get_channel(ifname, &ch_cur))
2202                 ch_cur = 0;
2203 
2204         /* initialize the value pointer with channel for callback */
2205         dbm_max = ch_cur;
2206 
2207         err = nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2208                               nl80211_get_txpwrlist_cb, &dbm_max);
2209 
2210         if (!err)
2211         {
2212                 for (dbm_cur = 0, dbm_cnt = 0;
2213                      dbm_cur < dbm_max;
2214                      dbm_cur++, dbm_cnt++)
2215                 {
2216                         entry.dbm = dbm_cur;
2217                         entry.mw  = iwinfo_dbm2mw(dbm_cur);
2218 
2219                         memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2220                 }
2221 
2222                 entry.dbm = dbm_max;
2223                 entry.mw  = iwinfo_dbm2mw(dbm_max);
2224 
2225                 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
2226                 dbm_cnt++;
2227 
2228                 *len = dbm_cnt * sizeof(entry);
2229                 return 0;
2230         }
2231 
2232         return -1;
2233 }
2234 
2235 static void nl80211_get_scancrypto(char *spec, struct iwinfo_crypto_entry *c)
2236 {
2237         int wpa_version = 0;
2238         char *p, *q, *proto, *suites;
2239 
2240         c->enabled = 0;
2241 
2242         for (p = strtok_r(spec, "[]", &q); p; p = strtok_r(NULL, "[]", &q)) {
2243                 if (!strcmp(p, "WEP")) {
2244                         c->enabled      = 1;
2245                         c->auth_suites  = IWINFO_KMGMT_NONE;
2246                         c->auth_algs    = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2247                         c->pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2248                         break;
2249                 }
2250 
2251                 proto = strtok(p, "-");
2252                 suites = strtok(NULL, "]");
2253 
2254                 if (!proto || !suites)
2255                         continue;
2256 
2257                 if (!strcmp(proto, "WPA2") || !strcmp(proto, "RSN"))
2258                         wpa_version = 2;
2259                 else if (!strcmp(proto, "WPA"))
2260                         wpa_version = 1;
2261                 else
2262                         continue;
2263 
2264                 c->enabled = 1;
2265 
2266                 parse_wpa_suites(suites, wpa_version, &c->wpa_version, &c->auth_suites);
2267                 parse_wpa_ciphers(suites, &c->pair_ciphers);
2268         }
2269 }
2270 
2271 
2272 struct nl80211_scanlist {
2273         struct iwinfo_scanlist_entry *e;
2274         int len;
2275 };
2276 
2277 
2278 static void nl80211_get_scanlist_ie(struct nlattr **bss,
2279                                     struct iwinfo_scanlist_entry *e)
2280 {
2281         int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2282         unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2283         static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
2284         int len;
2285 
2286         while (ielen >= 2 && ielen >= ie[1])
2287         {
2288                 switch (ie[0])
2289                 {
2290                 case 0: /* SSID */
2291                 case 114: /* Mesh ID */
2292                         if (e->ssid[0] == 0) {
2293                                 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
2294                                 memcpy(e->ssid, ie + 2, len);
2295                                 e->ssid[len] = 0;
2296                         }
2297                         break;
2298 
2299                 case 11: /* BSS Load */
2300                         iwinfo_parse_bss_load(e, ie + 2);
2301                         break;
2302 
2303                 case 48: /* RSN */
2304                         iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
2305                                          IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
2306                         break;
2307 
2308                 case 221: /* Vendor */
2309                         if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
2310                                 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
2311                                                  IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
2312                         break;
2313                 }
2314 
2315                 ielen -= ie[1] + 2;
2316                 ie += ie[1] + 2;
2317         }
2318 }
2319 
2320 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
2321 {
2322         int8_t rssi;
2323         uint16_t caps;
2324 
2325         struct nl80211_scanlist *sl = arg;
2326         struct nlattr **tb = nl80211_parse(msg);
2327         struct nlattr *bss[NL80211_BSS_MAX + 1];
2328 
2329         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2330                 [NL80211_BSS_TSF]                  = { .type = NLA_U64 },
2331                 [NL80211_BSS_FREQUENCY]            = { .type = NLA_U32 },
2332                 [NL80211_BSS_BSSID]                = { 0 },
2333                 [NL80211_BSS_BEACON_INTERVAL]      = { .type = NLA_U16 },
2334                 [NL80211_BSS_CAPABILITY]           = { .type = NLA_U16 },
2335                 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
2336                 [NL80211_BSS_SIGNAL_MBM]           = { .type = NLA_U32 },
2337                 [NL80211_BSS_SIGNAL_UNSPEC]        = { .type = NLA_U8  },
2338                 [NL80211_BSS_STATUS]               = { .type = NLA_U32 },
2339                 [NL80211_BSS_SEEN_MS_AGO]          = { .type = NLA_U32 },
2340                 [NL80211_BSS_BEACON_IES]           = { 0 },
2341         };
2342 
2343         if (!tb[NL80211_ATTR_BSS] ||
2344                 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2345                                  bss_policy) ||
2346                 !bss[NL80211_BSS_BSSID])
2347         {
2348                 return NL_SKIP;
2349         }
2350 
2351         if (bss[NL80211_BSS_CAPABILITY])
2352                 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2353         else
2354                 caps = 0;
2355 
2356         memset(sl->e, 0, sizeof(*sl->e));
2357         memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
2358 
2359         if (caps & (1<<1))
2360                 sl->e->mode = IWINFO_OPMODE_ADHOC;
2361         else if (caps & (1<<0))
2362                 sl->e->mode = IWINFO_OPMODE_MASTER;
2363         else
2364                 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
2365 
2366         if (caps & (1<<4))
2367                 sl->e->crypto.enabled = 1;
2368 
2369         if (bss[NL80211_BSS_FREQUENCY])
2370                 sl->e->channel = nl80211_freq2channel(nla_get_u32(
2371                         bss[NL80211_BSS_FREQUENCY]));
2372 
2373         if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
2374                 nl80211_get_scanlist_ie(bss, sl->e);
2375 
2376         if (bss[NL80211_BSS_SIGNAL_MBM])
2377         {
2378                 sl->e->signal =
2379                         (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
2380 
2381                 rssi = sl->e->signal - 0x100;
2382 
2383                 if (rssi < -110)
2384                         rssi = -110;
2385                 else if (rssi > -40)
2386                         rssi = -40;
2387 
2388                 sl->e->quality = (rssi + 110);
2389                 sl->e->quality_max = 70;
2390         }
2391 
2392         if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
2393         {
2394                 sl->e->crypto.auth_algs    = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2395                 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2396         }
2397 
2398         sl->e++;
2399         sl->len++;
2400 
2401         return NL_SKIP;
2402 }
2403 
2404 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
2405 {
2406         struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
2407 
2408         if (nl80211_request(ifname, NL80211_CMD_TRIGGER_SCAN, 0, NULL, NULL))
2409                 goto out;
2410 
2411         if (nl80211_wait("nl80211", "scan",
2412                          NL80211_CMD_NEW_SCAN_RESULTS, NL80211_CMD_SCAN_ABORTED))
2413                 goto out;
2414 
2415         if (nl80211_request(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
2416                             nl80211_get_scanlist_cb, &sl))
2417                 goto out;
2418 
2419         *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
2420         return 0;
2421 
2422 out:
2423         *len = 0;
2424         return -1;
2425 }
2426 
2427 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
2428 {
2429 #define hex(x) \
2430         (((x) >= 'a') ? ((x) - 'a' + 10) : \
2431                 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '')))
2432 
2433         int len = 0;
2434 
2435         while (*in)
2436         {
2437                 if (len + 1 >= outlen)
2438                         break;
2439 
2440                 switch (*in)
2441                 {
2442                 case '\\':
2443                         in++;
2444                         switch (*in)
2445                         {
2446                         case 'n':
2447                                 out[len++] = '\n'; in++;
2448                                 break;
2449 
2450                         case 'r':
2451                                 out[len++] = '\r'; in++;
2452                                 break;
2453 
2454                         case 't':
2455                                 out[len++] = '\t'; in++;
2456                                 break;
2457 
2458                         case 'e':
2459                                 out[len++] = '\033'; in++;
2460                                 break;
2461 
2462                         case 'x':
2463                                 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
2464                                         out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
2465                                 in += 3;
2466                                 break;
2467 
2468                         default:
2469                                 out[len++] = *in++;
2470                                 break;
2471                         }
2472                         break;
2473 
2474                 default:
2475                         out[len++] = *in++;
2476                         break;
2477                 }
2478         }
2479 
2480         if (outlen > len)
2481                 out[len] = '\0';
2482 
2483         return len;
2484 }
2485 
2486 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len)
2487 {
2488         int sock, qmax, rssi, tries, count = -1, ready = 0;
2489         char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096];
2490         struct sockaddr_un local = { 0 };
2491         struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
2492 
2493         sock = nl80211_wpactl_connect(ifname, &local);
2494 
2495         if (sock < 0)
2496                 return sock;
2497 
2498         send(sock, "ATTACH", 6, 0);
2499         send(sock, "SCAN", 4, 0);
2500 
2501         /*
2502          * wait for scan results:
2503          *   nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan
2504          *   72 channels at most. We'll also receive two "OK" messages acknowledging
2505          *   the "ATTACH" and "SCAN" commands and the driver might need a bit extra
2506          *   time to process the results, so try 72 + 2 + 1 times.
2507          */
2508         for (tries = 0; tries < 75; tries++)
2509         {
2510                 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0)
2511                         continue;
2512 
2513                 /* got an event notification */
2514                 if (reply[0] == '<')
2515                 {
2516                         /* scan results are ready */
2517                         if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS"))
2518                         {
2519                                 /* send "SCAN_RESULTS" command */
2520                                 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12);
2521                                 break;
2522                         }
2523 
2524                         /* is another unrelated event, retry */
2525                         tries--;
2526                 }
2527 
2528                 /* scanning already in progress, keep awaiting results */
2529                 else if (!strcmp(reply, "FAIL-BUSY\n"))
2530                 {
2531                         tries--;
2532                 }
2533 
2534                 /* another failure, abort */
2535                 else if (!strncmp(reply, "FAIL-", 5))
2536                 {
2537                         break;
2538                 }
2539         }
2540 
2541         /* receive and parse scan results if the wait above didn't time out */
2542         while (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
2543         {
2544                 /* received an event notification, receive again */
2545                 if (reply[0] == '<')
2546                         continue;
2547 
2548                 nl80211_get_quality_max(ifname, &qmax);
2549 
2550                 for (line = strtok_r(reply, "\n", &pos);
2551                      line != NULL;
2552                      line = strtok_r(NULL, "\n", &pos))
2553                 {
2554                         /* skip header line */
2555                         if (count < 0)
2556                         {
2557                                 count++;
2558                                 continue;
2559                         }
2560 
2561                         bssid  = strtok(line, "\t");
2562                         freq   = strtok(NULL, "\t");
2563                         signal = strtok(NULL, "\t");
2564                         flags  = strtok(NULL, "\t");
2565                         ssid   = strtok(NULL, "\n");
2566 
2567                         if (!bssid || !freq || !signal || !flags)
2568                                 continue;
2569 
2570                         /* BSSID */
2571                         e->mac[0] = strtol(&bssid[0],  NULL, 16);
2572                         e->mac[1] = strtol(&bssid[3],  NULL, 16);
2573                         e->mac[2] = strtol(&bssid[6],  NULL, 16);
2574                         e->mac[3] = strtol(&bssid[9],  NULL, 16);
2575                         e->mac[4] = strtol(&bssid[12], NULL, 16);
2576                         e->mac[5] = strtol(&bssid[15], NULL, 16);
2577 
2578                         /* SSID */
2579                         if (ssid)
2580                                 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2581                         else
2582                                 e->ssid[0] = 0;
2583 
2584                         /* Mode */
2585                         if (strstr(flags, "[MESH]"))
2586                                 e->mode = IWINFO_OPMODE_MESHPOINT;
2587                         else if (strstr(flags, "[IBSS]"))
2588                                 e->mode = IWINFO_OPMODE_ADHOC;
2589                         else
2590                                 e->mode = IWINFO_OPMODE_MASTER;
2591 
2592                         /* Channel */
2593                         e->channel = nl80211_freq2channel(atoi(freq));
2594 
2595                         /* Signal */
2596                         rssi = atoi(signal);
2597                         e->signal = rssi;
2598 
2599                         /* Quality */
2600                         if (rssi < 0)
2601                         {
2602                                 /* The cfg80211 wext compat layer assumes a signal range
2603                                  * of -110 dBm to -40 dBm, the quality value is derived
2604                                  * by adding 110 to the signal level */
2605                                 if (rssi < -110)
2606                                         rssi = -110;
2607                                 else if (rssi > -40)
2608                                         rssi = -40;
2609 
2610                                 e->quality = (rssi + 110);
2611                         }
2612                         else
2613                         {
2614                                 e->quality = rssi;
2615                         }
2616 
2617                         /* Max. Quality */
2618                         e->quality_max = qmax;
2619 
2620                         /* Crypto */
2621                         nl80211_get_scancrypto(flags, &e->crypto);
2622 
2623                         count++;
2624                         e++;
2625                 }
2626 
2627                 *len = count * sizeof(struct iwinfo_scanlist_entry);
2628                 break;
2629         }
2630 
2631         close(sock);
2632         unlink(local.sun_path);
2633 
2634         return (count >= 0) ? 0 : -1;
2635 }
2636 
2637 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
2638 {
2639         char *res;
2640         int rv, mode;
2641 
2642         *len = 0;
2643 
2644         /* Got a radioX pseudo interface, find some interface on it or create one */
2645         if (!strncmp(ifname, "radio", 5))
2646         {
2647                 /* Reuse existing interface */
2648                 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2649                 {
2650                         return nl80211_get_scanlist(res, buf, len);
2651                 }
2652 
2653                 /* Need to spawn a temporary iface for scanning */
2654                 else if ((res = nl80211_ifadd(ifname)) != NULL)
2655                 {
2656                         rv = nl80211_get_scanlist(res, buf, len);
2657                         nl80211_ifdel(res);
2658                         return rv;
2659                 }
2660         }
2661 
2662         /* WPA supplicant */
2663         if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
2664         {
2665                 return 0;
2666         }
2667 
2668         /* station / ad-hoc / monitor scan */
2669         else if (!nl80211_get_mode(ifname, &mode) &&
2670                  (mode == IWINFO_OPMODE_ADHOC ||
2671                   mode == IWINFO_OPMODE_MASTER ||
2672                   mode == IWINFO_OPMODE_CLIENT ||
2673                   mode == IWINFO_OPMODE_MONITOR) &&
2674                  iwinfo_ifup(ifname))
2675         {
2676                 return nl80211_get_scanlist_nl(ifname, buf, len);
2677         }
2678 
2679         /* AP scan */
2680         else
2681         {
2682                 /* Got a temp interface, don't create yet another one */
2683                 if (!strncmp(ifname, "tmp.", 4))
2684                 {
2685                         if (!iwinfo_ifup(ifname))
2686                                 return -1;
2687 
2688                         rv = nl80211_get_scanlist_nl(ifname, buf, len);
2689                         iwinfo_ifdown(ifname);
2690                         return rv;
2691                 }
2692 
2693                 /* Spawn a new scan interface */
2694                 else
2695                 {
2696                         if (!(res = nl80211_ifadd(ifname)))
2697                                 return -1;
2698 
2699                         iwinfo_ifmac(res);
2700 
2701                         /* if we can take the new interface up, the driver supports an
2702                          * additional interface and there's no need to tear down the ap */
2703                         if (iwinfo_ifup(res))
2704                         {
2705                                 rv = nl80211_get_scanlist_nl(res, buf, len);
2706                                 iwinfo_ifdown(res);
2707                         }
2708 
2709                         /* driver cannot create secondary interface, take down ap
2710                          * during scan */
2711                         else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2712                         {
2713                                 rv = nl80211_get_scanlist_nl(res, buf, len);
2714                                 iwinfo_ifdown(res);
2715                                 iwinfo_ifup(ifname);
2716                                 nl80211_hostapd_hup(ifname);
2717                         }
2718 
2719                         nl80211_ifdel(res);
2720                         return rv;
2721                 }
2722         }
2723 
2724         return -1;
2725 }
2726 
2727 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2728 {
2729         int bands_remain, freqs_remain;
2730 
2731         struct nl80211_array_buf *arr = arg;
2732         struct iwinfo_freqlist_entry *e;
2733 
2734         struct nlattr **attr = nl80211_parse(msg);
2735         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2736         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2737         struct nlattr *band, *freq;
2738 
2739         e = arr->buf;
2740         e += arr->count;
2741 
2742         if (attr[NL80211_ATTR_WIPHY_BANDS]) {
2743                 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2744                 {
2745                         nla_parse(bands, NL80211_BAND_ATTR_MAX,
2746                                   nla_data(band), nla_len(band), NULL);
2747 
2748                         if (bands[NL80211_BAND_ATTR_FREQS]) {
2749                                 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2750                                 {
2751                                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2752                                                   nla_data(freq), nla_len(freq), NULL);
2753 
2754                                         if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2755                                             freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2756                                                 continue;
2757 
2758                                         e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2759                                         e->channel = nl80211_freq2channel(e->mhz);
2760 
2761                                         e->restricted = (
2762                                                 freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
2763                                                 !freqs[NL80211_FREQUENCY_ATTR_RADAR]
2764                                         ) ? 1 : 0;
2765 
2766                                         if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_MINUS])
2767                                                 e->flags |= IWINFO_FREQ_NO_HT40MINUS;
2768                                         if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_PLUS])
2769                                                 e->flags |= IWINFO_FREQ_NO_HT40PLUS;
2770                                         if (freqs[NL80211_FREQUENCY_ATTR_NO_80MHZ])
2771                                                 e->flags |= IWINFO_FREQ_NO_80MHZ;
2772                                         if (freqs[NL80211_FREQUENCY_ATTR_NO_160MHZ])
2773                                                 e->flags |= IWINFO_FREQ_NO_160MHZ;
2774                                         if (freqs[NL80211_FREQUENCY_ATTR_NO_20MHZ])
2775                                                 e->flags |= IWINFO_FREQ_NO_20MHZ;
2776                                         if (freqs[NL80211_FREQUENCY_ATTR_NO_10MHZ])
2777                                                 e->flags |= IWINFO_FREQ_NO_10MHZ;
2778 
2779                                         e++;
2780                                         arr->count++;
2781                                 }
2782                         }
2783                 }
2784         }
2785 
2786         return NL_SKIP;
2787 }
2788 
2789 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2790 {
2791         struct nl80211_msg_conveyor *cv;
2792         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2793         uint32_t features = nl80211_get_protocol_features(ifname);
2794         int flags;
2795 
2796         flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
2797         cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
2798         if (!cv)
2799                 goto out;
2800 
2801         NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
2802         if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr))
2803                 goto out;
2804 
2805         *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2806         return 0;
2807 
2808 nla_put_failure:
2809         nl80211_free(cv);
2810 out:
2811         *len = 0;
2812         return -1;
2813 }
2814 
2815 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2816 {
2817         char *buf = arg;
2818         struct nlattr **attr = nl80211_parse(msg);
2819 
2820         if (attr[NL80211_ATTR_REG_ALPHA2])
2821                 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2822         else
2823                 buf[0] = 0;
2824 
2825         return NL_SKIP;
2826 }
2827 
2828 static int nl80211_get_country(const char *ifname, char *buf)
2829 {
2830         if (nl80211_request(ifname, NL80211_CMD_GET_REG, 0,
2831                             nl80211_get_country_cb, buf))
2832                 return -1;
2833 
2834         return 0;
2835 }
2836 
2837 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2838 {
2839         int count;
2840         struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2841         const struct iwinfo_iso3166_label *l;
2842 
2843         for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2844         {
2845                 e->iso3166 = l->iso3166;
2846                 e->ccode[0] = (l->iso3166 / 256);
2847                 e->ccode[1] = (l->iso3166 % 256);
2848                 e->ccode[2] = 0;
2849         }
2850 
2851         *len = (count * sizeof(struct iwinfo_country_entry));
2852         return 0;
2853 }
2854 
2855 
2856 struct nl80211_modes
2857 {
2858         bool ok;
2859         uint32_t hw;
2860         uint32_t ht;
2861 };
2862 
2863 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
2864 {
2865         struct nl80211_modes *m = arg;
2866         int bands_remain, freqs_remain;
2867         uint16_t caps = 0;
2868         uint32_t vht_caps = 0;
2869         struct nlattr **attr = nl80211_parse(msg);
2870         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2871         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2872         struct nlattr *band, *freq;
2873 
2874         if (attr[NL80211_ATTR_WIPHY_BANDS])
2875         {
2876                 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2877                 {
2878                         nla_parse(bands, NL80211_BAND_ATTR_MAX,
2879                                   nla_data(band), nla_len(band), NULL);
2880 
2881                         if (bands[NL80211_BAND_ATTR_HT_CAPA])
2882                                 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2883 
2884                         /* Treat any nonzero capability as 11n */
2885                         if (caps > 0)
2886                         {
2887                                 m->hw |= IWINFO_80211_N;
2888                                 m->ht |= IWINFO_HTMODE_HT20;
2889 
2890                                 if (caps & (1 << 1))
2891                                         m->ht |= IWINFO_HTMODE_HT40;
2892                         }
2893 
2894                         nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2895                                             freqs_remain)
2896                         {
2897                                 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2898                                           nla_data(freq), nla_len(freq), NULL);
2899 
2900                                 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2901                                         continue;
2902 
2903                                 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2904                                 {
2905                                         m->hw |= IWINFO_80211_B;
2906                                         m->hw |= IWINFO_80211_G;
2907                                 }
2908                                 else if (bands[NL80211_BAND_ATTR_VHT_CAPA])
2909                                 {
2910                                         vht_caps = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
2911 
2912                                         /* Treat any nonzero capability as 11ac */
2913                                         if (vht_caps > 0)
2914                                         {
2915                                                 m->hw |= IWINFO_80211_AC;
2916                                                 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
2917 
2918                                                 switch ((vht_caps >> 2) & 3)
2919                                                 {
2920                                                 case 2:
2921                                                         m->ht |= IWINFO_HTMODE_VHT80_80;
2922                                                         /* fall through */
2923 
2924                                                 case 1:
2925                                                         m->ht |= IWINFO_HTMODE_VHT160;
2926                                                 }
2927                                         }
2928                                 }
2929                                 else if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) >= 56160)
2930                                 {
2931                                         m->hw |= IWINFO_80211_AD;
2932                                 }
2933                                 else if (!(m->hw & IWINFO_80211_AC))
2934                                 {
2935                                         m->hw |= IWINFO_80211_A;
2936                                 }
2937                         }
2938                 }
2939 
2940                 m->ok = 1;
2941         }
2942 
2943         return NL_SKIP;
2944 }
2945 
2946 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
2947 {
2948         struct nl80211_modes m = { 0 };
2949 
2950         if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2951                             nl80211_get_modelist_cb, &m))
2952                 goto out;
2953 
2954         if (!m.ok)
2955                 goto out;
2956 
2957         *buf = m.hw;
2958         return 0;
2959 
2960 out:
2961         *buf = 0;
2962         return -1;
2963 }
2964 
2965 struct chan_info {
2966         int width;
2967         int mode;
2968 };
2969 
2970 static int nl80211_get_htmode_cb(struct nl_msg *msg, void *arg)
2971 {
2972         struct nlattr **tb = nl80211_parse(msg);
2973         struct nlattr *cur;
2974         struct chan_info *chn = arg;
2975 
2976         if ((cur = tb[NL80211_ATTR_CHANNEL_WIDTH]))
2977                 chn->width = nla_get_u32(cur);
2978 
2979         if ((cur = tb[NL80211_ATTR_BSS_HT_OPMODE]))
2980                 chn->mode = nla_get_u32(cur);
2981 
2982         return NL_SKIP;
2983 }
2984 
2985 static int nl80211_get_htmode(const char *ifname, int *buf)
2986 {
2987         struct chan_info chn = { .width = 0, .mode = 0 };
2988         char *res;
2989         int err;
2990 
2991         res = nl80211_phy2ifname(ifname);
2992         *buf = 0;
2993 
2994         err =  nl80211_request(res ? res : ifname,
2995                                 NL80211_CMD_GET_INTERFACE, 0,
2996                                 nl80211_get_htmode_cb, &chn);
2997         if (err)
2998                 return -1;
2999 
3000         switch (chn.width) {
3001         case NL80211_CHAN_WIDTH_20:
3002                 if (chn.mode == -1)
3003                         *buf = IWINFO_HTMODE_VHT20;
3004                 else
3005                         *buf = IWINFO_HTMODE_HT20;
3006                 break;
3007         case NL80211_CHAN_WIDTH_40:
3008                 if (chn.mode == -1)
3009                         *buf = IWINFO_HTMODE_VHT40;
3010                 else
3011                         *buf = IWINFO_HTMODE_HT40;
3012                 break;
3013         case NL80211_CHAN_WIDTH_80:
3014                 *buf = IWINFO_HTMODE_VHT80;
3015                 break;
3016         case NL80211_CHAN_WIDTH_80P80:
3017                 *buf = IWINFO_HTMODE_VHT80_80;
3018                 break;
3019         case NL80211_CHAN_WIDTH_160:
3020                 *buf = IWINFO_HTMODE_VHT160;
3021                 break;
3022         case NL80211_CHAN_WIDTH_5:
3023         case NL80211_CHAN_WIDTH_10:
3024         case NL80211_CHAN_WIDTH_20_NOHT:
3025                 *buf = IWINFO_HTMODE_NOHT;
3026                 break;
3027         default:
3028                 return -1;
3029         }
3030 
3031         return 0;
3032 }
3033 
3034 static int nl80211_get_htmodelist(const char *ifname, int *buf)
3035 {
3036         struct nl80211_modes m = { 0 };
3037 
3038         if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
3039                             nl80211_get_modelist_cb, &m))
3040                 goto out;
3041 
3042         if (!m.ok)
3043                 goto out;
3044 
3045         *buf = m.ht;
3046         return 0;
3047 
3048 out:
3049         *buf = 0;
3050         return -1;
3051 }
3052 
3053 
3054 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
3055 {
3056         struct nlattr **attr = nl80211_parse(msg);
3057         struct nlattr *comb;
3058         int *ret = arg;
3059         int comb_rem, limit_rem, mode_rem;
3060 
3061         *ret = 0;
3062         if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
3063                 return NL_SKIP;
3064 
3065         nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
3066         {
3067                 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
3068                         [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
3069                         [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
3070                 };
3071                 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1];
3072                 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
3073                         [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
3074                         [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
3075                 };
3076                 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1];
3077                 struct nlattr *limit;
3078 
3079                 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy);
3080 
3081                 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
3082                         continue;
3083 
3084                 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
3085                 {
3086                         struct nlattr *mode;
3087 
3088                         nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
3089 
3090                         if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
3091                             !tb_limit[NL80211_IFACE_LIMIT_MAX])
3092                                 continue;
3093 
3094                         if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
3095                                 continue;
3096 
3097                         nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
3098                                 if (nla_type(mode) == NL80211_IFTYPE_AP)
3099                                         *ret = 1;
3100                         }
3101                 }
3102         }
3103 
3104         return NL_SKIP;
3105 }
3106 
3107 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
3108 {
3109         if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
3110                             nl80211_get_ifcomb_cb, buf))
3111                 return -1;
3112 
3113         return 0;
3114 }
3115 
3116 static int nl80211_get_hardware_id(const char *ifname, char *buf)
3117 {
3118         struct iwinfo_hardware_id *id = (struct iwinfo_hardware_id *)buf;
3119         char *phy, num[8], path[PATH_MAX];
3120         int i;
3121 
3122         struct { const char *path; uint16_t *dest; } lookup[] = {
3123                 { "vendor", &id->vendor_id },
3124                 { "device", &id->device_id },
3125                 { "subsystem_vendor", &id->subsystem_vendor_id },
3126                 { "subsystem_device", &id->subsystem_device_id }
3127         };
3128 
3129         memset(id, 0, sizeof(*id));
3130 
3131         /* Try to determine the phy name from the given interface */
3132         phy = nl80211_ifname2phy(ifname);
3133 
3134         for (i = 0; i < ARRAY_SIZE(lookup); i++)
3135         {
3136                 snprintf(path, sizeof(path), "/sys/class/%s/%s/device/%s",
3137                          phy ? "ieee80211" : "net",
3138                          phy ? phy : ifname, lookup[i].path);
3139 
3140                 if (nl80211_readstr(path, num, sizeof(num)) > 0)
3141                         *lookup[i].dest = strtoul(num, NULL, 16);
3142         }
3143 
3144         /* Failed to obtain hardware IDs, search board config */
3145         if (id->vendor_id == 0 || id->device_id == 0)
3146                 return iwinfo_hardware_id_from_mtd(id);
3147 
3148         return 0;
3149 }
3150 
3151 static const struct iwinfo_hardware_entry *
3152 nl80211_get_hardware_entry(const char *ifname)
3153 {
3154         struct iwinfo_hardware_id id;
3155 
3156         if (nl80211_get_hardware_id(ifname, (char *)&id))
3157                 return NULL;
3158 
3159         return iwinfo_hardware(&id);
3160 }
3161 
3162 static int nl80211_get_hardware_name(const char *ifname, char *buf)
3163 {
3164         const struct iwinfo_hardware_entry *hw;
3165 
3166         if (!(hw = nl80211_get_hardware_entry(ifname)))
3167                 sprintf(buf, "Generic MAC80211");
3168         else
3169                 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
3170 
3171         return 0;
3172 }
3173 
3174 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
3175 {
3176         const struct iwinfo_hardware_entry *hw;
3177 
3178         if (!(hw = nl80211_get_hardware_entry(ifname)))
3179                 return -1;
3180 
3181         *buf = hw->txpower_offset;
3182         return 0;
3183 }
3184 
3185 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
3186 {
3187         const struct iwinfo_hardware_entry *hw;
3188 
3189         if (!(hw = nl80211_get_hardware_entry(ifname)))
3190                 return -1;
3191 
3192         *buf = hw->frequency_offset;
3193         return 0;
3194 }
3195 
3196 static int nl80211_lookup_phyname(const char *section, char *buf)
3197 {
3198         int idx;
3199 
3200         if ((idx = nl80211_phy_idx_from_uci(section)) < 0)
3201                 return -1;
3202 
3203         sprintf(buf, "phy%d", idx);
3204         return 0;
3205 }
3206 
3207 const struct iwinfo_ops nl80211_ops = {
3208         .name             = "nl80211",
3209         .probe            = nl80211_probe,
3210         .channel          = nl80211_get_channel,
3211         .frequency        = nl80211_get_frequency,
3212         .frequency_offset = nl80211_get_frequency_offset,
3213         .txpower          = nl80211_get_txpower,
3214         .txpower_offset   = nl80211_get_txpower_offset,
3215         .bitrate          = nl80211_get_bitrate,
3216         .signal           = nl80211_get_signal,
3217         .noise            = nl80211_get_noise,
3218         .quality          = nl80211_get_quality,
3219         .quality_max      = nl80211_get_quality_max,
3220         .mbssid_support   = nl80211_get_mbssid_support,
3221         .hwmodelist       = nl80211_get_hwmodelist,
3222         .htmodelist       = nl80211_get_htmodelist,
3223         .htmode           = nl80211_get_htmode,
3224         .mode             = nl80211_get_mode,
3225         .ssid             = nl80211_get_ssid,
3226         .bssid            = nl80211_get_bssid,
3227         .country          = nl80211_get_country,
3228         .hardware_id      = nl80211_get_hardware_id,
3229         .hardware_name    = nl80211_get_hardware_name,
3230         .encryption       = nl80211_get_encryption,
3231         .phyname          = nl80211_get_phyname,
3232         .assoclist        = nl80211_get_assoclist,
3233         .txpwrlist        = nl80211_get_txpwrlist,
3234         .scanlist         = nl80211_get_scanlist,
3235         .freqlist         = nl80211_get_freqlist,
3236         .countrylist      = nl80211_get_countrylist,
3237         .survey           = nl80211_get_survey,
3238         .lookup_phy       = nl80211_lookup_phyname,
3239         .close            = nl80211_close
3240 };
3241 

This page was automatically generated by LXR 0.3.1.  •  OpenWrt