iwinfo: add phyname attribute, this is useful to group networks by radio phy
[openwrt.git] / package / network / utils / iwinfo / src / 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 "iwinfo/nl80211.h"
26 #include "iwinfo/wext.h"
27
28 #define min(x, y) ((x) < (y)) ? (x) : (y)
29
30 static struct nl80211_state *nls = NULL;
31
32 static int nl80211_init(void)
33 {
34         int err, fd;
35
36         if (!nls)
37         {
38                 nls = malloc(sizeof(struct nl80211_state));
39                 if (!nls) {
40                         err = -ENOMEM;
41                         goto err;
42                 }
43
44                 memset(nls, 0, sizeof(*nls));
45
46                 nls->nl_sock = nl_socket_alloc();
47                 if (!nls->nl_sock) {
48                         err = -ENOMEM;
49                         goto err;
50                 }
51
52                 if (genl_connect(nls->nl_sock)) {
53                         err = -ENOLINK;
54                         goto err;
55                 }
56
57                 fd = nl_socket_get_fd(nls->nl_sock);
58                 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
59                         err = -EINVAL;
60                         goto err;
61                 }
62
63                 if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
64                         err = -ENOMEM;
65                         goto err;
66                 }
67
68                 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
69                 if (!nls->nl80211) {
70                         err = -ENOENT;
71                         goto err;
72                 }
73
74                 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
75                 if (!nls->nlctrl) {
76                         err = -ENOENT;
77                         goto err;
78                 }
79         }
80
81         return 0;
82
83
84 err:
85         nl80211_close();
86         return err;
87 }
88
89
90 static int nl80211_msg_error(struct sockaddr_nl *nla,
91         struct nlmsgerr *err, void *arg)
92 {
93         int *ret = arg;
94         *ret = err->error;
95         return NL_STOP;
96 }
97
98 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
99 {
100         int *ret = arg;
101         *ret = 0;
102         return NL_SKIP;
103 }
104
105 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
106 {
107         int *ret = arg;
108         *ret = 0;
109         return NL_STOP;
110 }
111
112 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
113 {
114         return NL_SKIP;
115 }
116
117 static void nl80211_free(struct nl80211_msg_conveyor *cv)
118 {
119         if (cv)
120         {
121                 if (cv->cb)
122                         nl_cb_put(cv->cb);
123
124                 if (cv->msg)
125                         nlmsg_free(cv->msg);
126
127                 cv->cb  = NULL;
128                 cv->msg = NULL;
129         }
130 }
131
132 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
133                                                  int cmd, int flags)
134 {
135         static struct nl80211_msg_conveyor cv;
136
137         struct nl_msg *req = NULL;
138         struct nl_cb *cb = NULL;
139
140         req = nlmsg_alloc();
141         if (!req)
142                 goto err;
143
144         cb = nl_cb_alloc(NL_CB_DEFAULT);
145         if (!cb)
146                 goto err;
147
148         genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
149
150         cv.msg = req;
151         cv.cb  = cb;
152
153         return &cv;
154
155 err:
156 nla_put_failure:
157         if (cb)
158                 nl_cb_put(cb);
159
160         if (req)
161                 nlmsg_free(req);
162
163         return NULL;
164 }
165
166 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
167 {
168         if (nl80211_init() < 0)
169                 return NULL;
170
171         return nl80211_new(nls->nlctrl, cmd, flags);
172 }
173
174 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
175                                                  int cmd, int flags)
176 {
177         int ifidx = -1, phyidx = -1;
178         struct nl80211_msg_conveyor *cv;
179
180         if (nl80211_init() < 0)
181                 return NULL;
182
183         if (!strncmp(ifname, "phy", 3))
184                 phyidx = atoi(&ifname[3]);
185         else if (!strncmp(ifname, "radio", 5))
186                 phyidx = atoi(&ifname[5]);
187         else if (!strncmp(ifname, "mon.", 4))
188                 ifidx = if_nametoindex(&ifname[4]);
189         else
190                 ifidx = if_nametoindex(ifname);
191
192         if ((ifidx < 0) && (phyidx < 0))
193                 return NULL;
194
195         cv = nl80211_new(nls->nl80211, cmd, flags);
196         if (!cv)
197                 return NULL;
198
199         if (ifidx > -1)
200                 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
201
202         if (phyidx > -1)
203                 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
204
205         return cv;
206
207 nla_put_failure:
208         nl80211_free(cv);
209         return NULL;
210 }
211
212 static struct nl80211_msg_conveyor * nl80211_send(
213         struct nl80211_msg_conveyor *cv,
214         int (*cb_func)(struct nl_msg *, void *), void *cb_arg
215 ) {
216         static struct nl80211_msg_conveyor rcv;
217         int err = 1;
218
219         if (cb_func)
220                 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
221         else
222                 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
223
224         if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
225                 goto err;
226
227         nl_cb_err(cv->cb,               NL_CB_CUSTOM, nl80211_msg_error,  &err);
228         nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
229         nl_cb_set(cv->cb, NL_CB_ACK,    NL_CB_CUSTOM, nl80211_msg_ack,    &err);
230
231         while (err > 0)
232                 nl_recvmsgs(nls->nl_sock, cv->cb);
233
234         return &rcv;
235
236 err:
237         nl_cb_put(cv->cb);
238         nlmsg_free(cv->msg);
239
240         return NULL;
241 }
242
243 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
244 {
245         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
246         static struct nlattr *attr[NL80211_ATTR_MAX + 1];
247
248         nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
249                   genlmsg_attrlen(gnlh, 0), NULL);
250
251         return attr;
252 }
253
254
255 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
256 {
257         struct nl80211_group_conveyor *cv = arg;
258
259         struct nlattr **attr = nl80211_parse(msg);
260         struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
261         struct nlattr *mgrp;
262         int mgrpidx;
263
264         if (!attr[CTRL_ATTR_MCAST_GROUPS])
265                 return NL_SKIP;
266
267         nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
268         {
269                 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
270                           nla_data(mgrp), nla_len(mgrp), NULL);
271
272                 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
273                     mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
274                     !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
275                              cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
276                 {
277                         cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
278                         break;
279                 }
280         }
281
282         return NL_SKIP;
283 }
284
285 static int nl80211_subscribe(const char *family, const char *group)
286 {
287         struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
288         struct nl80211_msg_conveyor *req;
289
290         req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
291         if (req)
292         {
293                 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
294                 nl80211_send(req, nl80211_subscribe_cb, &cv);
295
296 nla_put_failure:
297                 nl80211_free(req);
298         }
299
300         return nl_socket_add_membership(nls->nl_sock, cv.id);
301 }
302
303
304 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
305 {
306         struct nl80211_event_conveyor *cv = arg;
307         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
308
309         if (gnlh->cmd == cv->wait)
310                 cv->recv = gnlh->cmd;
311
312         return NL_SKIP;
313 }
314
315 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
316 {
317         return NL_OK;
318 }
319
320 static int nl80211_wait(const char *family, const char *group, int cmd)
321 {
322         struct nl80211_event_conveyor cv = { .wait = cmd };
323         struct nl_cb *cb;
324
325         if (nl80211_subscribe(family, group))
326                 return -ENOENT;
327
328         cb = nl_cb_alloc(NL_CB_DEFAULT);
329
330         if (!cb)
331                 return -ENOMEM;
332
333         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
334         nl_cb_set(cb, NL_CB_VALID,     NL_CB_CUSTOM, nl80211_wait_cb,        &cv );
335
336         while (!cv.recv)
337                 nl_recvmsgs(nls->nl_sock, cb);
338
339         nl_cb_put(cb);
340
341         return 0;
342 }
343
344
345 static int nl80211_freq2channel(int freq)
346 {
347         if (freq == 2484)
348                 return 14;
349         else if (freq < 2484)
350                 return (freq - 2407) / 5;
351         else if (freq >= 4910 && freq <= 4980)
352                 return (freq - 4000) / 5;
353         else
354                 return (freq - 5000) / 5;
355 }
356
357 static int nl80211_channel2freq(int channel, const char *band)
358 {
359         if (!band || band[0] != 'a')
360         {
361                 if (channel == 14)
362                         return 2484;
363                 else if (channel < 14)
364                         return (channel * 5) + 2407;
365         }
366         else
367         {
368                 if (channel >= 182 && channel <= 196)
369                         return (channel * 5) + 4000;
370                 else
371                         return (channel * 5) + 5000;
372         }
373
374         return 0;
375 }
376
377 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
378 {
379         int i, len;
380         char lkey[64] = { 0 };
381         const char *ln = buf;
382         static char lval[256] = { 0 };
383
384         int matched_if = ifname ? 0 : 1;
385
386
387         for( i = 0, len = strlen(buf); i < len; i++ )
388         {
389                 if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
390                 {
391                         ln++;
392                 }
393                 else if (!lkey[0] && (buf[i] == '='))
394                 {
395                         if ((&buf[i] - ln) > 0)
396                                 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
397                 }
398                 else if (buf[i] == '\n')
399                 {
400                         if (lkey[0])
401                         {
402                                 memcpy(lval, ln + strlen(lkey) + 1,
403                                         min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
404
405                                 if ((ifname != NULL) &&
406                                     (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
407                                 {
408                                         matched_if = !strcmp(lval, ifname);
409                                 }
410                                 else if (matched_if && !strcmp(lkey, key))
411                                 {
412                                         return lval;
413                                 }
414                         }
415
416                         ln = &buf[i+1];
417                         memset(lkey, 0, sizeof(lkey));
418                         memset(lval, 0, sizeof(lval));
419                 }
420         }
421
422         return NULL;
423 }
424
425 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
426 {
427         char *buf = arg;
428         struct nlattr **attr = nl80211_parse(msg);
429
430         if (attr[NL80211_ATTR_WIPHY_NAME])
431                 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
432                        nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
433         else
434                 buf[0] = 0;
435
436         return NL_SKIP;
437 }
438
439 static char * nl80211_ifname2phy(const char *ifname)
440 {
441         static char phy[32] = { 0 };
442         struct nl80211_msg_conveyor *req;
443
444         memset(phy, 0, sizeof(phy));
445
446         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
447         if (req)
448         {
449                 nl80211_send(req, nl80211_ifname2phy_cb, phy);
450                 nl80211_free(req);
451         }
452
453         return phy[0] ? phy : NULL;
454 }
455
456 static char * nl80211_hostapd_info(const char *ifname)
457 {
458         int mode;
459         char *phy;
460         char path[32] = { 0 };
461         static char buf[4096] = { 0 };
462         FILE *conf;
463
464         if (nl80211_get_mode(ifname, &mode))
465                 return NULL;
466
467         if ((mode == IWINFO_OPMODE_MASTER || mode == IWINFO_OPMODE_AP_VLAN) &&
468             (phy = nl80211_ifname2phy(ifname)) != NULL)
469         {
470                 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
471
472                 if ((conf = fopen(path, "r")) != NULL)
473                 {
474                         fread(buf, sizeof(buf) - 1, 1, conf);
475                         fclose(conf);
476
477                         return buf;
478                 }
479         }
480
481         return NULL;
482 }
483
484 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
485 {
486         fd_set rfds;
487         struct timeval tv = { 2, 0 };
488
489         FD_ZERO(&rfds);
490         FD_SET(sock, &rfds);
491
492         memset(buf, 0, blen);
493
494
495         if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
496                 return -1;
497
498         if (!FD_ISSET(sock, &rfds))
499                 return -1;
500
501         return recv(sock, buf, blen, 0);
502 }
503
504 static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
505                                                                    const char *event)
506 {
507         int numtry = 0;
508         int sock = -1;
509         char *rv = NULL;
510         size_t remote_length, local_length;
511         static char buffer[10240] = { 0 };
512
513         struct sockaddr_un local = { 0 };
514         struct sockaddr_un remote = { 0 };
515
516
517         sock = socket(PF_UNIX, SOCK_DGRAM, 0);
518         if (sock < 0)
519                 return NULL;
520
521         remote.sun_family = AF_UNIX;
522         remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
523                 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
524
525         if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
526                 goto out;
527
528         if (connect(sock, (struct sockaddr *) &remote, remote_length))
529                 goto out;
530
531         local.sun_family = AF_UNIX;
532         local_length = sizeof(local.sun_family) +
533                 sprintf(local.sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
534
535         if (bind(sock, (struct sockaddr *) &local, local_length))
536                 goto out;
537
538
539         if (event)
540         {
541                 send(sock, "ATTACH", 6, 0);
542
543                 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
544                         goto out;
545         }
546
547
548         send(sock, cmd, strlen(cmd), 0);
549
550         /* we might have to scan up to 72 channels / 256ms per channel */
551         /* this makes up to 18.5s hence 10 tries */
552         while( numtry++ < 10 )
553         {
554                 char *bracket;
555
556                 /* make sure there is a terminating nul byte */
557                 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
558                 {
559                         if (event)
560                                 continue;
561
562                         break;
563                 }
564
565                 if ((!event && buffer[0] != '<') || (event && strstr(buffer, event)))
566                         break;
567
568                 /* there may be more than max(numtry) BSS-ADDED events */
569                 /* ignore them similar to wpa_cli */
570                 if (buffer[0] == '<' &&
571                                 (bracket=strchr(buffer,'>')) != NULL &&
572                                 strncmp(bracket+1,"CTRL-EVENT-BSS-ADDED",20) == 0)
573                         numtry--;
574         }
575
576         rv = buffer;
577
578 out:
579         close(sock);
580
581         if (local.sun_family)
582                 unlink(local.sun_path);
583
584         return rv;
585 }
586
587 static inline int nl80211_readint(const char *path)
588 {
589         int fd;
590         int rv = -1;
591         char buffer[16];
592
593         if ((fd = open(path, O_RDONLY)) > -1)
594         {
595                 if (read(fd, buffer, sizeof(buffer)) > 0)
596                         rv = atoi(buffer);
597
598                 close(fd);
599         }
600
601         return rv;
602 }
603
604 static char * nl80211_phy2ifname(const char *ifname)
605 {
606         int fd, ifidx = -1, cifidx = -1, phyidx = -1;
607         char buffer[64];
608         static char nif[IFNAMSIZ] = { 0 };
609
610         DIR *d;
611         struct dirent *e;
612
613         if (!ifname)
614                 return NULL;
615         else if (!strncmp(ifname, "phy", 3))
616                 phyidx = atoi(&ifname[3]);
617         else if (!strncmp(ifname, "radio", 5))
618                 phyidx = atoi(&ifname[5]);
619
620         memset(nif, 0, sizeof(nif));
621
622         if (phyidx > -1)
623         {
624                 if ((d = opendir("/sys/class/net")) != NULL)
625                 {
626                         while ((e = readdir(d)) != NULL)
627                         {
628                                 snprintf(buffer, sizeof(buffer),
629                                          "/sys/class/net/%s/phy80211/index", e->d_name);
630
631                                 if (nl80211_readint(buffer) == phyidx)
632                                 {
633                                         snprintf(buffer, sizeof(buffer),
634                                                  "/sys/class/net/%s/ifindex", e->d_name);
635
636                                         if ((cifidx = nl80211_readint(buffer)) >= 0 &&
637                                             ((ifidx < 0) || (cifidx < ifidx)))
638                                         {
639                                                 ifidx = cifidx;
640                                                 strncpy(nif, e->d_name, sizeof(nif));
641                                         }
642                                 }
643                         }
644
645                         closedir(d);
646                 }
647         }
648
649         return nif[0] ? nif : NULL;
650 }
651
652 static char * nl80211_ifadd(const char *ifname)
653 {
654         int phyidx;
655         char *rv = NULL;
656         static char nif[IFNAMSIZ] = { 0 };
657         struct nl80211_msg_conveyor *req, *res;
658
659         req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
660         if (req)
661         {
662                 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
663
664                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
665                 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
666
667                 nl80211_send(req, NULL, NULL);
668
669                 rv = nif;
670
671         nla_put_failure:
672                 nl80211_free(req);
673         }
674
675         return rv;
676 }
677
678 static void nl80211_ifdel(const char *ifname)
679 {
680         struct nl80211_msg_conveyor *req;
681
682         req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
683         if (req)
684         {
685                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
686
687                 nl80211_send(req, NULL, NULL);
688
689         nla_put_failure:
690                 nl80211_free(req);
691         }
692 }
693
694 static void nl80211_hostapd_hup(const char *ifname)
695 {
696         int fd, pid = 0;
697         char buf[32];
698         char *phy = nl80211_ifname2phy(ifname);
699
700         if (phy)
701         {
702                 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
703                 if ((fd = open(buf, O_RDONLY)) > 0)
704                 {
705                         if (read(fd, buf, sizeof(buf)) > 0)
706                                 pid = atoi(buf);
707
708                         close(fd);
709                 }
710
711                 if (pid > 0)
712                         kill(pid, 1);
713         }
714 }
715
716
717 int nl80211_probe(const char *ifname)
718 {
719         return !!nl80211_ifname2phy(ifname);
720 }
721
722 void nl80211_close(void)
723 {
724         if (nls)
725         {
726                 if (nls->nlctrl)
727                         genl_family_put(nls->nlctrl);
728
729                 if (nls->nl80211)
730                         genl_family_put(nls->nl80211);
731
732                 if (nls->nl_sock)
733                         nl_socket_free(nls->nl_sock);
734
735                 if (nls->nl_cache)
736                         nl_cache_free(nls->nl_cache);
737
738                 free(nls);
739                 nls = NULL;
740         }
741 }
742
743
744 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
745 {
746         int *mode = arg;
747         struct nlattr **tb = nl80211_parse(msg);
748         const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
749                 IWINFO_OPMODE_UNKNOWN,          /* unspecified */
750                 IWINFO_OPMODE_ADHOC,            /* IBSS */
751                 IWINFO_OPMODE_CLIENT,           /* managed */
752                 IWINFO_OPMODE_MASTER,           /* AP */
753                 IWINFO_OPMODE_AP_VLAN,          /* AP/VLAN */
754                 IWINFO_OPMODE_WDS,                      /* WDS */
755                 IWINFO_OPMODE_MONITOR,          /* monitor */
756                 IWINFO_OPMODE_MESHPOINT,        /* mesh point */
757                 IWINFO_OPMODE_P2P_CLIENT,       /* P2P-client */
758                 IWINFO_OPMODE_P2P_GO,           /* P2P-GO */
759         };
760
761         if (tb[NL80211_ATTR_IFTYPE])
762                 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
763
764         return NL_SKIP;
765 }
766
767 int nl80211_get_mode(const char *ifname, int *buf)
768 {
769         char *res;
770         struct nl80211_msg_conveyor *req;
771
772         res = nl80211_phy2ifname(ifname);
773         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
774         *buf = IWINFO_OPMODE_UNKNOWN;
775
776         if (req)
777         {
778                 nl80211_send(req, nl80211_get_mode_cb, buf);
779                 nl80211_free(req);
780         }
781
782         return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
783 }
784
785
786 struct nl80211_ssid_bssid {
787         unsigned char *ssid;
788         unsigned char bssid[7];
789 };
790
791 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
792 {
793         int ielen;
794         unsigned char *ie;
795         struct nl80211_ssid_bssid *sb = arg;
796         struct nlattr **tb = nl80211_parse(msg);
797         struct nlattr *bss[NL80211_BSS_MAX + 1];
798
799         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
800                 [NL80211_BSS_INFORMATION_ELEMENTS] = {                 },
801                 [NL80211_BSS_STATUS]               = { .type = NLA_U32 },
802         };
803
804         if (!tb[NL80211_ATTR_BSS] ||
805             nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
806                              bss_policy) ||
807             !bss[NL80211_BSS_BSSID] ||
808             !bss[NL80211_BSS_STATUS] ||
809             !bss[NL80211_BSS_INFORMATION_ELEMENTS])
810         {
811                 return NL_SKIP;
812         }
813
814         switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
815         {
816         case NL80211_BSS_STATUS_ASSOCIATED:
817         case NL80211_BSS_STATUS_AUTHENTICATED:
818         case NL80211_BSS_STATUS_IBSS_JOINED:
819
820                 if (sb->ssid)
821                 {
822                         ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
823                         ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
824
825                         while (ielen >= 2 && ielen >= ie[1])
826                         {
827                                 if (ie[0] == 0)
828                                 {
829                                         memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
830                                         return NL_SKIP;
831                                 }
832
833                                 ielen -= ie[1] + 2;
834                                 ie += ie[1] + 2;
835                         }
836                 }
837                 else
838                 {
839                         sb->bssid[0] = 1;
840                         memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
841                         return NL_SKIP;
842                 }
843
844         default:
845                 return NL_SKIP;
846         }
847 }
848
849 int nl80211_get_ssid(const char *ifname, char *buf)
850 {
851         char *res;
852         struct nl80211_msg_conveyor *req;
853         struct nl80211_ssid_bssid sb;
854
855         /* try to find ssid from scan dump results */
856         res = nl80211_phy2ifname(ifname);
857         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
858
859         sb.ssid = buf;
860         *buf = 0;
861
862         if (req)
863         {
864                 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
865                 nl80211_free(req);
866         }
867
868         /* failed, try to find from hostapd info */
869         if ((*buf == 0) &&
870             (res = nl80211_hostapd_info(ifname)) &&
871             (res = nl80211_getval(ifname, res, "ssid")))
872         {
873                 memcpy(buf, res, strlen(res));
874         }
875
876         return (*buf == 0) ? -1 : 0;
877 }
878
879 int nl80211_get_bssid(const char *ifname, char *buf)
880 {
881         char *res;
882         struct nl80211_msg_conveyor *req;
883         struct nl80211_ssid_bssid sb;
884
885         /* try to find bssid from scan dump results */
886         res = nl80211_phy2ifname(ifname);
887         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
888
889         sb.ssid = NULL;
890         sb.bssid[0] = 0;
891
892         if (req)
893         {
894                 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
895                 nl80211_free(req);
896         }
897
898         /* failed, try to find mac from hostapd info */
899         if ((sb.bssid[0] == 0) &&
900             (res = nl80211_hostapd_info(ifname)) &&
901             (res = nl80211_getval(ifname, res, "bssid")))
902         {
903                 sb.bssid[0] = 1;
904                 sb.bssid[1] = strtol(&res[0],  NULL, 16);
905                 sb.bssid[2] = strtol(&res[3],  NULL, 16);
906                 sb.bssid[3] = strtol(&res[6],  NULL, 16);
907                 sb.bssid[4] = strtol(&res[9],  NULL, 16);
908                 sb.bssid[5] = strtol(&res[12], NULL, 16);
909                 sb.bssid[6] = strtol(&res[15], NULL, 16);
910         }
911
912         if (sb.bssid[0])
913         {
914                 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
915                         sb.bssid[1], sb.bssid[2], sb.bssid[3],
916                         sb.bssid[4], sb.bssid[5], sb.bssid[6]);
917
918                 return 0;
919         }
920
921         return -1;
922 }
923
924
925 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
926 {
927         int *freq = arg;
928         struct nlattr **attr = nl80211_parse(msg);
929         struct nlattr *binfo[NL80211_BSS_MAX + 1];
930
931         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
932                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
933                 [NL80211_BSS_STATUS]    = { .type = NLA_U32 },
934         };
935
936         if (attr[NL80211_ATTR_BSS] &&
937             !nla_parse_nested(binfo, NL80211_BSS_MAX,
938                               attr[NL80211_ATTR_BSS], bss_policy))
939         {
940                 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
941                         *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
942         }
943
944         return NL_SKIP;
945 }
946
947 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
948 {
949         int *freq = arg;
950         struct nlattr **tb = nl80211_parse(msg);
951
952         if (tb[NL80211_ATTR_WIPHY_FREQ])
953                 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
954
955         return NL_SKIP;
956 }
957
958 int nl80211_get_frequency(const char *ifname, int *buf)
959 {
960         int chn;
961         char *res, *channel;
962         struct nl80211_msg_conveyor *req;
963
964         /* try to find frequency from interface info */
965         res = nl80211_phy2ifname(ifname);
966         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
967         *buf = 0;
968
969         if (req)
970         {
971                 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
972                 nl80211_free(req);
973         }
974
975         /* failed, try to find frequency from hostapd info */
976         if ((*buf == 0) &&
977             (res = nl80211_hostapd_info(ifname)) &&
978             (channel = nl80211_getval(NULL, res, "channel")))
979         {
980                 chn = atoi(channel);
981                 *buf = nl80211_channel2freq(chn, nl80211_getval(NULL, res, "hw_mode"));
982         }
983         else
984         {
985                 /* failed, try to find frequency from scan results */
986                 if (*buf == 0)
987                 {
988                         res = nl80211_phy2ifname(ifname);
989                         req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN,
990                                           NLM_F_DUMP);
991
992                         if (req)
993                         {
994                                 nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
995                                 nl80211_free(req);
996                         }
997                 }
998         }
999
1000         return (*buf == 0) ? -1 : 0;
1001 }
1002
1003 int nl80211_get_channel(const char *ifname, int *buf)
1004 {
1005         if (!nl80211_get_frequency(ifname, buf))
1006         {
1007                 *buf = nl80211_freq2channel(*buf);
1008                 return 0;
1009         }
1010
1011         return -1;
1012 }
1013
1014
1015 int nl80211_get_txpower(const char *ifname, int *buf)
1016 {
1017 #if 0
1018         char *res;
1019         char path[PATH_MAX];
1020
1021         res = nl80211_ifname2phy(ifname);
1022         snprintf(path, sizeof(path), "/sys/kernel/debug/ieee80211/%s/power",
1023                  res ? res : ifname);
1024
1025         if ((*buf = nl80211_readint(path)) > -1)
1026                 return 0;
1027 #endif
1028
1029         return wext_get_txpower(ifname, buf);
1030 }
1031
1032
1033 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1034 {
1035         int8_t dbm;
1036         int16_t mbit;
1037         struct nl80211_rssi_rate *rr = arg;
1038         struct nlattr **attr = nl80211_parse(msg);
1039         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1040         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1041
1042         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1043                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
1044                 [NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
1045                 [NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
1046                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
1047                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
1048                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
1049                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
1050                 [NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
1051                 [NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
1052                 [NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
1053         };
1054
1055         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1056                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16  },
1057                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8   },
1058                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1059                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG },
1060         };
1061
1062         if (attr[NL80211_ATTR_STA_INFO])
1063         {
1064                 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1065                                       attr[NL80211_ATTR_STA_INFO], stats_policy))
1066                 {
1067                         if (sinfo[NL80211_STA_INFO_SIGNAL])
1068                         {
1069                                 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1070                                 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1071                         }
1072
1073                         if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1074                         {
1075                                 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1076                                                       sinfo[NL80211_STA_INFO_TX_BITRATE],
1077                                                       rate_policy))
1078                                 {
1079                                         if (rinfo[NL80211_RATE_INFO_BITRATE])
1080                                         {
1081                                                 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1082                                                 rr->rate = rr->rate
1083                                                         ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1084                                         }
1085                                 }
1086                         }
1087                 }
1088         }
1089
1090         return NL_SKIP;
1091 }
1092
1093 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1094 {
1095         DIR *d;
1096         struct dirent *de;
1097         struct nl80211_msg_conveyor *req;
1098
1099         r->rssi = 0;
1100         r->rate = 0;
1101
1102         if ((d = opendir("/sys/class/net")) != NULL)
1103         {
1104                 while ((de = readdir(d)) != NULL)
1105                 {
1106                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1107                             (!de->d_name[strlen(ifname)] ||
1108                              !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1109                         {
1110                                 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1111                                                   NLM_F_DUMP);
1112
1113                                 if (req)
1114                                 {
1115                                         nl80211_send(req, nl80211_fill_signal_cb, r);
1116                                         nl80211_free(req);
1117                                 }
1118                         }
1119                 }
1120
1121                 closedir(d);
1122         }
1123 }
1124
1125 int nl80211_get_bitrate(const char *ifname, int *buf)
1126 {
1127         struct nl80211_rssi_rate rr;
1128
1129         nl80211_fill_signal(ifname, &rr);
1130
1131         if (rr.rate)
1132         {
1133                 *buf = (rr.rate * 100);
1134                 return 0;
1135         }
1136
1137         return -1;
1138 }
1139
1140 int nl80211_get_signal(const char *ifname, int *buf)
1141 {
1142         struct nl80211_rssi_rate rr;
1143
1144         nl80211_fill_signal(ifname, &rr);
1145
1146         if (rr.rssi)
1147         {
1148                 *buf = rr.rssi;
1149                 return 0;
1150         }
1151
1152         return -1;
1153 }
1154
1155 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1156 {
1157         int8_t *noise = arg;
1158         struct nlattr **tb = nl80211_parse(msg);
1159         struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1160
1161         static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1162                 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1163                 [NL80211_SURVEY_INFO_NOISE]     = { .type = NLA_U8  },
1164         };
1165
1166         if (!tb[NL80211_ATTR_SURVEY_INFO])
1167                 return NL_SKIP;
1168
1169         if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1170                              tb[NL80211_ATTR_SURVEY_INFO], sp))
1171                 return NL_SKIP;
1172
1173         if (!si[NL80211_SURVEY_INFO_NOISE])
1174                 return NL_SKIP;
1175
1176         if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1177                 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1178
1179         return NL_SKIP;
1180 }
1181
1182
1183 int nl80211_get_noise(const char *ifname, int *buf)
1184 {
1185         int8_t noise;
1186         struct nl80211_msg_conveyor *req;
1187
1188         req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1189         if (req)
1190         {
1191                 noise = 0;
1192
1193                 nl80211_send(req, nl80211_get_noise_cb, &noise);
1194                 nl80211_free(req);
1195
1196                 if (noise)
1197                 {
1198                         *buf = noise;
1199                         return 0;
1200                 }
1201         }
1202
1203         return -1;
1204 }
1205
1206 int nl80211_get_quality(const char *ifname, int *buf)
1207 {
1208         int signal;
1209
1210         if (!nl80211_get_signal(ifname, &signal))
1211         {
1212                 /* A positive signal level is usually just a quality
1213                  * value, pass through as-is */
1214                 if (signal >= 0)
1215                 {
1216                         *buf = signal;
1217                 }
1218
1219                 /* The cfg80211 wext compat layer assumes a signal range
1220                  * of -110 dBm to -40 dBm, the quality value is derived
1221                  * by adding 110 to the signal level */
1222                 else
1223                 {
1224                         if (signal < -110)
1225                                 signal = -110;
1226                         else if (signal > -40)
1227                                 signal = -40;
1228
1229                         *buf = (signal + 110);
1230                 }
1231
1232                 return 0;
1233         }
1234
1235         return -1;
1236 }
1237
1238 int nl80211_get_quality_max(const char *ifname, int *buf)
1239 {
1240         /* The cfg80211 wext compat layer assumes a maximum
1241          * quality of 70 */
1242         *buf = 70;
1243
1244         return 0;
1245 }
1246
1247 int nl80211_get_encryption(const char *ifname, char *buf)
1248 {
1249         int i;
1250         char k[9];
1251         char *val, *res;
1252         struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1253
1254         /* WPA supplicant */
1255         if ((res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
1256             (val = nl80211_getval(NULL, res, "pairwise_cipher")))
1257         {
1258                 /* WEP */
1259                 if (strstr(val, "WEP"))
1260                 {
1261                         if (strstr(val, "WEP-40"))
1262                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1263
1264                         else if (strstr(val, "WEP-104"))
1265                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1266
1267                         c->enabled       = 1;
1268                         c->group_ciphers = c->pair_ciphers;
1269
1270                         c->auth_suites |= IWINFO_KMGMT_NONE;
1271                         c->auth_algs   |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1272                 }
1273
1274                 /* WPA */
1275                 else
1276                 {
1277                         if (strstr(val, "TKIP"))
1278                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1279
1280                         else if (strstr(val, "CCMP"))
1281                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1282
1283                         else if (strstr(val, "NONE"))
1284                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1285
1286                         else if (strstr(val, "WEP-40"))
1287                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1288
1289                         else if (strstr(val, "WEP-104"))
1290                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1291
1292
1293                         if ((val = nl80211_getval(NULL, res, "group_cipher")))
1294                         {
1295                                 if (strstr(val, "TKIP"))
1296                                         c->group_ciphers |= IWINFO_CIPHER_TKIP;
1297
1298                                 else if (strstr(val, "CCMP"))
1299                                         c->group_ciphers |= IWINFO_CIPHER_CCMP;
1300
1301                                 else if (strstr(val, "NONE"))
1302                                         c->group_ciphers |= IWINFO_CIPHER_NONE;
1303
1304                                 else if (strstr(val, "WEP-40"))
1305                                         c->group_ciphers |= IWINFO_CIPHER_WEP40;
1306
1307                                 else if (strstr(val, "WEP-104"))
1308                                         c->group_ciphers |= IWINFO_CIPHER_WEP104;
1309                         }
1310
1311
1312                         if ((val = nl80211_getval(NULL, res, "key_mgmt")))
1313                         {
1314                                 if (strstr(val, "WPA2"))
1315                                         c->wpa_version = 2;
1316
1317                                 else if (strstr(val, "WPA"))
1318                                         c->wpa_version = 1;
1319
1320
1321                                 if (strstr(val, "PSK"))
1322                                         c->auth_suites |= IWINFO_KMGMT_PSK;
1323
1324                                 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
1325                                         c->auth_suites |= IWINFO_KMGMT_8021x;
1326
1327                                 else if (strstr(val, "NONE"))
1328                                         c->auth_suites |= IWINFO_KMGMT_NONE;
1329                         }
1330
1331                         c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1332                 }
1333
1334                 return 0;
1335         }
1336
1337         /* Hostapd */
1338         else if ((res = nl80211_hostapd_info(ifname)))
1339         {
1340                 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
1341                         c->wpa_version = atoi(val);
1342
1343                 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
1344
1345                 if (!val || strstr(val, "PSK"))
1346                         c->auth_suites |= IWINFO_KMGMT_PSK;
1347
1348                 if (val && strstr(val, "EAP"))
1349                         c->auth_suites |= IWINFO_KMGMT_8021x;
1350
1351                 if (val && strstr(val, "NONE"))
1352                         c->auth_suites |= IWINFO_KMGMT_NONE;
1353
1354                 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
1355                 {
1356                         if (strstr(val, "TKIP"))
1357                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1358
1359                         if (strstr(val, "CCMP"))
1360                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1361
1362                         if (strstr(val, "NONE"))
1363                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1364                 }
1365
1366                 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1367                 {
1368                         switch(atoi(val)) {
1369                                 case 1:
1370                                         c->auth_algs |= IWINFO_AUTH_OPEN;
1371                                         break;
1372
1373                                 case 2:
1374                                         c->auth_algs |= IWINFO_AUTH_SHARED;
1375                                         break;
1376
1377                                 case 3:
1378                                         c->auth_algs |= IWINFO_AUTH_OPEN;
1379                                         c->auth_algs |= IWINFO_AUTH_SHARED;
1380                                         break;
1381
1382                                 default:
1383                                         break;
1384                         }
1385
1386                         for (i = 0; i < 4; i++)
1387                         {
1388                                 snprintf(k, sizeof(k), "wep_key%d", i);
1389
1390                                 if ((val = nl80211_getval(ifname, res, k)))
1391                                 {
1392                                         if ((strlen(val) == 5) || (strlen(val) == 10))
1393                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1394
1395                                         else if ((strlen(val) == 13) || (strlen(val) == 26))
1396                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1397                                 }
1398                         }
1399                 }
1400
1401                 c->group_ciphers = c->pair_ciphers;
1402                 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1403
1404                 return 0;
1405         }
1406
1407         return -1;
1408 }
1409
1410 int nl80211_get_phyname(const char *ifname, char *buf)
1411 {
1412         const char *name;
1413
1414         name = nl80211_ifname2phy(ifname);
1415
1416         if (name)
1417         {
1418                 strcpy(buf, name);
1419                 return 0;
1420         }
1421         else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1422         {
1423                 name = nl80211_ifname2phy(name);
1424
1425                 if (name)
1426                 {
1427                         strcpy(buf, ifname);
1428                         return 0;
1429                 }
1430         }
1431
1432         return -1;
1433 }
1434
1435
1436 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1437 {
1438         struct nl80211_array_buf *arr = arg;
1439         struct iwinfo_assoclist_entry *e = arr->buf;
1440         struct nlattr **attr = nl80211_parse(msg);
1441         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1442         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1443
1444         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1445                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
1446                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
1447                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
1448                 [NL80211_STA_INFO_RX_BITRATE]    = { .type = NLA_NESTED },
1449                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
1450                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
1451         };
1452
1453         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1454                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16    },
1455                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8     },
1456                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG   },
1457                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG   },
1458         };
1459
1460         /* advance to end of array */
1461         e += arr->count;
1462         memset(e, 0, sizeof(*e));
1463
1464         if (attr[NL80211_ATTR_MAC])
1465                 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1466
1467         if (attr[NL80211_ATTR_STA_INFO] &&
1468             !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1469                               attr[NL80211_ATTR_STA_INFO], stats_policy))
1470         {
1471                 if (sinfo[NL80211_STA_INFO_SIGNAL])
1472                         e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1473
1474                 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1475                         e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1476
1477                 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1478                         e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1479
1480                 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1481                         e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1482
1483                 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1484                     !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1485                                       sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1486                 {
1487                         if (rinfo[NL80211_RATE_INFO_BITRATE])
1488                                 e->rx_rate.rate =
1489                                         nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1490
1491                         if (rinfo[NL80211_RATE_INFO_MCS])
1492                                 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1493
1494                         if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1495                                 e->rx_rate.is_40mhz = 1;
1496
1497                         if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1498                                 e->rx_rate.is_short_gi = 1;
1499                 }
1500
1501                 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1502                     !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1503                                       sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1504                 {
1505                         if (rinfo[NL80211_RATE_INFO_BITRATE])
1506                                 e->tx_rate.rate =
1507                                         nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1508
1509                         if (rinfo[NL80211_RATE_INFO_MCS])
1510                                 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1511
1512                         if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1513                                 e->tx_rate.is_40mhz = 1;
1514
1515                         if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1516                                 e->tx_rate.is_short_gi = 1;
1517                 }
1518         }
1519
1520         e->noise = 0; /* filled in by caller */
1521         arr->count++;
1522
1523         return NL_SKIP;
1524 }
1525
1526 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1527 {
1528         DIR *d;
1529         int i, noise = 0;
1530         struct dirent *de;
1531         struct nl80211_msg_conveyor *req;
1532         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1533         struct iwinfo_assoclist_entry *e;
1534
1535         if ((d = opendir("/sys/class/net")) != NULL)
1536         {
1537                 while ((de = readdir(d)) != NULL)
1538                 {
1539                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1540                             (!de->d_name[strlen(ifname)] ||
1541                              !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1542                         {
1543                                 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1544                                                   NLM_F_DUMP);
1545
1546                                 if (req)
1547                                 {
1548                                         nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1549                                         nl80211_free(req);
1550                                 }
1551                         }
1552                 }
1553
1554                 closedir(d);
1555
1556                 if (!nl80211_get_noise(ifname, &noise))
1557                         for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1558                                 e->noise = noise;
1559
1560                 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1561                 return 0;
1562         }
1563
1564         return -1;
1565 }
1566
1567 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1568 {
1569         int *dbm_max = arg;
1570         int ch_cur, ch_cmp, bands_remain, freqs_remain;
1571
1572         struct nlattr **attr = nl80211_parse(msg);
1573         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1574         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1575         struct nlattr *band, *freq;
1576
1577         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1578                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
1579                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
1580                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1581                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
1582                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
1583                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
1584         };
1585
1586         ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1587         *dbm_max = -1;
1588
1589         nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1590         {
1591                 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1592                           nla_len(band), NULL);
1593
1594                 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1595                 {
1596                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1597                                   nla_data(freq), nla_len(freq), freq_policy);
1598
1599                         ch_cmp = nl80211_freq2channel(nla_get_u32(
1600                                 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1601
1602                         if ((!ch_cur || (ch_cmp == ch_cur)) &&
1603                             freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1604                         {
1605                                 *dbm_max = (int)(0.01 * nla_get_u32(
1606                                         freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1607
1608                                 break;
1609                         }
1610                 }
1611         }
1612
1613         return NL_SKIP;
1614 }
1615
1616 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1617 {
1618         int ch_cur;
1619         int dbm_max = -1, dbm_cur, dbm_cnt;
1620         struct nl80211_msg_conveyor *req;
1621         struct iwinfo_txpwrlist_entry entry;
1622
1623         if (nl80211_get_channel(ifname, &ch_cur))
1624                 ch_cur = 0;
1625
1626         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1627         if (req)
1628         {
1629                 /* initialize the value pointer with channel for callback */
1630                 dbm_max = ch_cur;
1631
1632                 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1633                 nl80211_free(req);
1634         }
1635
1636         if (dbm_max > 0)
1637         {
1638                 for (dbm_cur = 0, dbm_cnt = 0;
1639                      dbm_cur < dbm_max;
1640                      dbm_cur++, dbm_cnt++)
1641                 {
1642                         entry.dbm = dbm_cur;
1643                         entry.mw  = iwinfo_dbm2mw(dbm_cur);
1644
1645                         memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1646                 }
1647
1648                 entry.dbm = dbm_max;
1649                 entry.mw  = iwinfo_dbm2mw(dbm_max);
1650
1651                 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1652                 dbm_cnt++;
1653
1654                 *len = dbm_cnt * sizeof(entry);
1655                 return 0;
1656         }
1657
1658         return -1;
1659 }
1660
1661 static void nl80211_get_scancrypto(const char *spec,
1662         struct iwinfo_crypto_entry *c)
1663 {
1664         if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1665         {
1666                 c->enabled = 1;
1667
1668                 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1669                         c->wpa_version = 3;
1670
1671                 else if (strstr(spec, "WPA2"))
1672                         c->wpa_version = 2;
1673
1674                 else if (strstr(spec, "WPA"))
1675                         c->wpa_version = 1;
1676
1677                 else if (strstr(spec, "WEP"))
1678                         c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1679
1680
1681                 if (strstr(spec, "PSK"))
1682                         c->auth_suites |= IWINFO_KMGMT_PSK;
1683
1684                 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1685                         c->auth_suites |= IWINFO_KMGMT_8021x;
1686
1687                 if (strstr(spec, "WPA-NONE"))
1688                         c->auth_suites |= IWINFO_KMGMT_NONE;
1689
1690
1691                 if (strstr(spec, "TKIP"))
1692                         c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1693
1694                 if (strstr(spec, "CCMP"))
1695                         c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1696
1697                 if (strstr(spec, "WEP-40"))
1698                         c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1699
1700                 if (strstr(spec, "WEP-104"))
1701                         c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1702
1703                 c->group_ciphers = c->pair_ciphers;
1704         }
1705         else
1706         {
1707                 c->enabled = 0;
1708         }
1709 }
1710
1711
1712 struct nl80211_scanlist {
1713         struct iwinfo_scanlist_entry *e;
1714         int len;
1715 };
1716
1717
1718 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1719                                     struct iwinfo_scanlist_entry *e)
1720 {
1721         int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1722         unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1723         static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1724
1725         while (ielen >= 2 && ielen >= ie[1])
1726         {
1727                 switch (ie[0])
1728                 {
1729                 case 0: /* SSID */
1730                         memcpy(e->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1731                         break;
1732
1733                 case 48: /* RSN */
1734                         iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1735                                          IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1736                         break;
1737
1738                 case 221: /* Vendor */
1739                         if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1740                                 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1741                                                  IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1742                         break;
1743                 }
1744
1745                 ielen -= ie[1] + 2;
1746                 ie += ie[1] + 2;
1747         }
1748 }
1749
1750 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
1751 {
1752         int8_t rssi;
1753         uint16_t caps;
1754
1755         struct nl80211_scanlist *sl = arg;
1756         struct nlattr **tb = nl80211_parse(msg);
1757         struct nlattr *bss[NL80211_BSS_MAX + 1];
1758
1759         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1760                 [NL80211_BSS_TSF]                  = { .type = NLA_U64 },
1761                 [NL80211_BSS_FREQUENCY]            = { .type = NLA_U32 },
1762                 [NL80211_BSS_BSSID]                = {                 },
1763                 [NL80211_BSS_BEACON_INTERVAL]      = { .type = NLA_U16 },
1764                 [NL80211_BSS_CAPABILITY]           = { .type = NLA_U16 },
1765                 [NL80211_BSS_INFORMATION_ELEMENTS] = {                 },
1766                 [NL80211_BSS_SIGNAL_MBM]           = { .type = NLA_U32 },
1767                 [NL80211_BSS_SIGNAL_UNSPEC]        = { .type = NLA_U8  },
1768                 [NL80211_BSS_STATUS]               = { .type = NLA_U32 },
1769                 [NL80211_BSS_SEEN_MS_AGO]          = { .type = NLA_U32 },
1770                 [NL80211_BSS_BEACON_IES]           = {                 },
1771         };
1772
1773         if (!tb[NL80211_ATTR_BSS] ||
1774                 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1775                                  bss_policy) ||
1776                 !bss[NL80211_BSS_BSSID])
1777         {
1778                 return NL_SKIP;
1779         }
1780
1781         if (bss[NL80211_BSS_CAPABILITY])
1782                 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1783         else
1784                 caps = 0;
1785
1786         memset(sl->e, 0, sizeof(*sl->e));
1787         memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
1788
1789         if (caps & (1<<1))
1790                 sl->e->mode = IWINFO_OPMODE_ADHOC;
1791         else if (caps & (1<<0))
1792                 sl->e->mode = IWINFO_OPMODE_MASTER;
1793         else
1794                 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
1795
1796         if (caps & (1<<4))
1797                 sl->e->crypto.enabled = 1;
1798
1799         if (bss[NL80211_BSS_FREQUENCY])
1800                 sl->e->channel = nl80211_freq2channel(nla_get_u32(
1801                         bss[NL80211_BSS_FREQUENCY]));
1802
1803         if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
1804                 nl80211_get_scanlist_ie(bss, sl->e);
1805
1806         if (bss[NL80211_BSS_SIGNAL_MBM])
1807         {
1808                 sl->e->signal =
1809                         (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
1810
1811                 rssi = sl->e->signal - 0x100;
1812
1813                 if (rssi < -110)
1814                         rssi = -110;
1815                 else if (rssi > -40)
1816                         rssi = -40;
1817
1818                 sl->e->quality = (rssi + 110);
1819                 sl->e->quality_max = 70;
1820         }
1821
1822         if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
1823         {
1824                 sl->e->crypto.auth_algs    = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1825                 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
1826         }
1827
1828         sl->e++;
1829         sl->len++;
1830
1831         return NL_SKIP;
1832 }
1833
1834 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
1835 {
1836         struct nl80211_msg_conveyor *req;
1837         struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
1838
1839         req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
1840         if (req)
1841         {
1842                 nl80211_send(req, NULL, NULL);
1843                 nl80211_free(req);
1844         }
1845
1846         nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
1847
1848         req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1849         if (req)
1850         {
1851                 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
1852                 nl80211_free(req);
1853         }
1854
1855         *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
1856         return *len ? 0 : -1;
1857 }
1858
1859 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1860 {
1861         int freq, rssi, qmax, count;
1862         char *res;
1863         char ssid[128] = { 0 };
1864         char bssid[18] = { 0 };
1865         char cipher[256] = { 0 };
1866
1867         /* Got a radioX pseudo interface, find some interface on it or create one */
1868         if (!strncmp(ifname, "radio", 5))
1869         {
1870                 /* Reuse existing interface */
1871                 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1872                 {
1873                         return nl80211_get_scanlist(res, buf, len);
1874                 }
1875
1876                 /* Need to spawn a temporary iface for scanning */
1877                 else if ((res = nl80211_ifadd(ifname)) != NULL)
1878                 {
1879                         count = nl80211_get_scanlist(res, buf, len);
1880                         nl80211_ifdel(res);
1881                         return count;
1882                 }
1883         }
1884
1885         struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1886
1887         /* WPA supplicant */
1888         if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1889         {
1890                 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1891                 {
1892                         nl80211_get_quality_max(ifname, &qmax);
1893
1894                         count = -1;
1895
1896                         do {
1897                                 if (res[0] == '<')
1898                                 {
1899                                         /* skip log lines */
1900                                         goto nextline;
1901                                 }
1902                                 if (count < 0)
1903                                 {
1904                                         /* skip header line */
1905                                         count++;
1906                                         goto nextline;
1907                                 }
1908                                 if (sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1909                                               bssid, &freq, &rssi, cipher, ssid) < 5)
1910                                 {
1911                                         /* skip malformed lines */
1912                                         goto nextline;
1913                                 }
1914                                 /* BSSID */
1915                                 e->mac[0] = strtol(&bssid[0],  NULL, 16);
1916                                 e->mac[1] = strtol(&bssid[3],  NULL, 16);
1917                                 e->mac[2] = strtol(&bssid[6],  NULL, 16);
1918                                 e->mac[3] = strtol(&bssid[9],  NULL, 16);
1919                                 e->mac[4] = strtol(&bssid[12], NULL, 16);
1920                                 e->mac[5] = strtol(&bssid[15], NULL, 16);
1921
1922                                 /* SSID */
1923                                 memcpy(e->ssid, ssid, min(strlen(ssid), sizeof(e->ssid) - 1));
1924
1925                                 /* Mode (assume master) */
1926                                 if (strstr(cipher,"[MESH]"))
1927                                         e->mode = IWINFO_OPMODE_MESHPOINT;
1928                                 else
1929                                         e->mode = IWINFO_OPMODE_MASTER;
1930
1931                                 /* Channel */
1932                                 e->channel = nl80211_freq2channel(freq);
1933
1934                                 /* Signal */
1935                                 e->signal = rssi;
1936
1937                                 /* Quality */
1938                                 if (rssi < 0)
1939                                 {
1940                                         /* The cfg80211 wext compat layer assumes a signal range
1941                                          * of -110 dBm to -40 dBm, the quality value is derived
1942                                          * by adding 110 to the signal level */
1943                                         if (rssi < -110)
1944                                                 rssi = -110;
1945                                         else if (rssi > -40)
1946                                                 rssi = -40;
1947
1948                                         e->quality = (rssi + 110);
1949                                 }
1950                                 else
1951                                 {
1952                                         e->quality = rssi;
1953                                 }
1954
1955                                 /* Max. Quality */
1956                                 e->quality_max = qmax;
1957
1958                                 /* Crypto */
1959                                 nl80211_get_scancrypto(cipher, &e->crypto);
1960
1961                                 count++;
1962                                 e++;
1963
1964                                 memset(ssid, 0, sizeof(ssid));
1965                                 memset(bssid, 0, sizeof(bssid));
1966                                 memset(cipher, 0, sizeof(cipher));
1967
1968                         nextline:
1969                                 /* advance to next line */
1970                                 while( *res && *res++ != '\n' );
1971                         }
1972                         while( *res );
1973
1974                         *len = count * sizeof(struct iwinfo_scanlist_entry);
1975                         return 0;
1976                 }
1977         }
1978
1979         /* AP scan */
1980         else
1981         {
1982                 /* Got a temp interface, don't create yet another one */
1983                 if (!strncmp(ifname, "tmp.", 4))
1984                 {
1985                         if (!iwinfo_ifup(ifname))
1986                                 return -1;
1987
1988                         nl80211_get_scanlist_nl(ifname, buf, len);
1989                         iwinfo_ifdown(ifname);
1990                         return 0;
1991                 }
1992
1993                 /* Spawn a new scan interface */
1994                 else
1995                 {
1996                         if (!(res = nl80211_ifadd(ifname)))
1997                                 goto out;
1998
1999                         if (!iwinfo_ifmac(res))
2000                                 goto out;
2001
2002                         /* if we can take the new interface up, the driver supports an
2003                          * additional interface and there's no need to tear down the ap */
2004                         if (iwinfo_ifup(res))
2005                         {
2006                                 nl80211_get_scanlist_nl(res, buf, len);
2007                                 iwinfo_ifdown(res);
2008                         }
2009
2010                         /* driver cannot create secondary interface, take down ap
2011                          * during scan */
2012                         else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2013                         {
2014                                 nl80211_get_scanlist_nl(res, buf, len);
2015                                 iwinfo_ifdown(res);
2016                                 iwinfo_ifup(ifname);
2017                                 nl80211_hostapd_hup(ifname);
2018                         }
2019
2020                 out:
2021                         nl80211_ifdel(res);
2022                         return 0;
2023                 }
2024         }
2025
2026         return -1;
2027 }
2028
2029 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2030 {
2031         int bands_remain, freqs_remain;
2032
2033         struct nl80211_array_buf *arr = arg;
2034         struct iwinfo_freqlist_entry *e = arr->buf;
2035
2036         struct nlattr **attr = nl80211_parse(msg);
2037         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2038         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2039         struct nlattr *band, *freq;
2040
2041         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2042                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
2043                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
2044                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2045                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
2046                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
2047                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
2048         };
2049
2050         nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2051         {
2052                 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2053                           nla_data(band), nla_len(band), NULL);
2054
2055                 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2056                 {
2057                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2058                                   nla_data(freq), nla_len(freq), NULL);
2059
2060                         if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2061                             freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2062                                 continue;
2063
2064                         e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2065                         e->channel = nl80211_freq2channel(e->mhz);
2066
2067                         e->restricted = (
2068                                 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
2069                                 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS]      ||
2070                                 freqs[NL80211_FREQUENCY_ATTR_RADAR]
2071                         ) ? 1 : 0;
2072
2073                         e++;
2074                         arr->count++;
2075                 }
2076         }
2077
2078         return NL_SKIP;
2079 }
2080
2081 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2082 {
2083         struct nl80211_msg_conveyor *req;
2084         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2085
2086         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2087         if (req)
2088         {
2089                 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2090                 nl80211_free(req);
2091         }
2092
2093         if (arr.count > 0)
2094         {
2095                 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2096                 return 0;
2097         }
2098
2099         return -1;
2100 }
2101
2102 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2103 {
2104         char *buf = arg;
2105         struct nlattr **attr = nl80211_parse(msg);
2106
2107         if (attr[NL80211_ATTR_REG_ALPHA2])
2108                 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2109         else
2110                 buf[0] = 0;
2111
2112         return NL_SKIP;
2113 }
2114
2115 int nl80211_get_country(const char *ifname, char *buf)
2116 {
2117         int rv = -1;
2118         struct nl80211_msg_conveyor *req;
2119
2120         req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2121         if (req)
2122         {
2123                 nl80211_send(req, nl80211_get_country_cb, buf);
2124                 nl80211_free(req);
2125
2126                 if (buf[0])
2127                         rv = 0;
2128         }
2129
2130         return rv;
2131 }
2132
2133 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2134 {
2135         int i, count;
2136         struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2137         const struct iwinfo_iso3166_label *l;
2138
2139         for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2140         {
2141                 e->iso3166 = l->iso3166;
2142                 e->ccode[0] = (l->iso3166 / 256);
2143                 e->ccode[1] = (l->iso3166 % 256);
2144         }
2145
2146         *len = (count * sizeof(struct iwinfo_country_entry));
2147         return 0;
2148 }
2149
2150 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
2151 {
2152         int *modes = arg;
2153         int bands_remain, freqs_remain;
2154         uint16_t caps = 0;
2155         struct nlattr **attr = nl80211_parse(msg);
2156         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2157         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2158         struct nlattr *band, *freq;
2159
2160         *modes = 0;
2161
2162         if (attr[NL80211_ATTR_WIPHY_BANDS])
2163         {
2164                 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2165                 {
2166                         nla_parse(bands, NL80211_BAND_ATTR_MAX,
2167                                   nla_data(band), nla_len(band), NULL);
2168
2169                         if (bands[NL80211_BAND_ATTR_HT_CAPA])
2170                                 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2171
2172                         /* Treat any nonzero capability as 11n */
2173                         if (caps > 0)
2174                                 *modes |= IWINFO_80211_N;
2175
2176                         nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2177                                             freqs_remain)
2178                         {
2179                                 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2180                                           nla_data(freq), nla_len(freq), NULL);
2181
2182                                 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2183                                         continue;
2184
2185                                 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2186                                 {
2187                                         *modes |= IWINFO_80211_B;
2188                                         *modes |= IWINFO_80211_G;
2189                                 }
2190                                 else
2191                                 {
2192                                         *modes |= IWINFO_80211_A;
2193                                 }
2194                         }
2195                 }
2196         }
2197
2198         return NL_SKIP;
2199 }
2200
2201 int nl80211_get_hwmodelist(const char *ifname, int *buf)
2202 {
2203         struct nl80211_msg_conveyor *req;
2204
2205         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2206         if (req)
2207         {
2208                 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
2209                 nl80211_free(req);
2210         }
2211
2212         return *buf ? 0 : -1;
2213 }
2214
2215 int nl80211_get_mbssid_support(const char *ifname, int *buf)
2216 {
2217         /* Test whether we can create another interface */
2218         char *nif = nl80211_ifadd(ifname);
2219
2220         if (nif)
2221         {
2222                 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
2223
2224                 iwinfo_ifdown(nif);
2225                 nl80211_ifdel(nif);
2226
2227                 return 0;
2228         }
2229
2230         return -1;
2231 }
2232
2233 int nl80211_get_hardware_id(const char *ifname, char *buf)
2234 {
2235         int rv;
2236         char *res;
2237
2238         /* Got a radioX pseudo interface, find some interface on it or create one */
2239         if (!strncmp(ifname, "radio", 5))
2240         {
2241                 /* Reuse existing interface */
2242                 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2243                 {
2244                         rv = wext_get_hardware_id(res, buf);
2245                 }
2246
2247                 /* Need to spawn a temporary iface for finding IDs */
2248                 else if ((res = nl80211_ifadd(ifname)) != NULL)
2249                 {
2250                         rv = wext_get_hardware_id(res, buf);
2251                         nl80211_ifdel(res);
2252                 }
2253         }
2254         else
2255         {
2256                 rv = wext_get_hardware_id(ifname, buf);
2257         }
2258
2259         /* Failed to obtain hardware IDs, search board config */
2260         if (rv)
2261         {
2262                 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2263         }
2264
2265         return rv;
2266 }
2267
2268 static const struct iwinfo_hardware_entry *
2269 nl80211_get_hardware_entry(const char *ifname)
2270 {
2271         struct iwinfo_hardware_id id;
2272
2273         if (nl80211_get_hardware_id(ifname, (char *)&id))
2274                 return NULL;
2275
2276         return iwinfo_hardware(&id);
2277 }
2278
2279 int nl80211_get_hardware_name(const char *ifname, char *buf)
2280 {
2281         const struct iwinfo_hardware_entry *hw;
2282
2283         if (!(hw = nl80211_get_hardware_entry(ifname)))
2284                 sprintf(buf, "Generic MAC80211");
2285         else
2286                 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2287
2288         return 0;
2289 }
2290
2291 int nl80211_get_txpower_offset(const char *ifname, int *buf)
2292 {
2293         const struct iwinfo_hardware_entry *hw;
2294
2295         if (!(hw = nl80211_get_hardware_entry(ifname)))
2296                 return -1;
2297
2298         *buf = hw->txpower_offset;
2299         return 0;
2300 }
2301
2302 int nl80211_get_frequency_offset(const char *ifname, int *buf)
2303 {
2304         const struct iwinfo_hardware_entry *hw;
2305
2306         if (!(hw = nl80211_get_hardware_entry(ifname)))
2307                 return -1;
2308
2309         *buf = hw->frequency_offset;
2310         return 0;
2311 }