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libiwinfo: do survey without bringing down the ap if possible
[project/luci.git] / contrib / package / iwinfo / src / iwinfo_nl80211.c
1 /*
2 * iwinfo - Wireless Information Library - NL80211 Backend
3 *
4 * Copyright (C) 2010 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 extern struct iwinfo_iso3166_label ISO3166_Names[];
31 static struct nl80211_state *nls = NULL;
32 static int nl80211_ioctlsock = -1;
33
34 static int nl80211_init(void)
35 {
36 int err, fd;
37
38 if( !nls )
39 {
40 nl80211_ioctlsock = socket(AF_INET, SOCK_DGRAM, 0);
41 if( nl80211_ioctlsock < 0 )
42 {
43 err = -ENOLINK;
44 goto err;
45 }
46 else if( fcntl(nl80211_ioctlsock, F_SETFD,
47 fcntl(nl80211_ioctlsock, F_GETFD) | FD_CLOEXEC) < 0 )
48 {
49 err = -EINVAL;
50 goto err;
51 }
52
53 nls = malloc(sizeof(struct nl80211_state));
54 if( !nls ) {
55 err = -ENOMEM;
56 goto err;
57 }
58
59 nls->nl_sock = nl_socket_alloc();
60 if( !nls->nl_sock ) {
61 err = -ENOMEM;
62 goto err;
63 }
64
65 if( genl_connect(nls->nl_sock)) {
66 err = -ENOLINK;
67 goto err;
68 }
69
70 fd = nl_socket_get_fd(nls->nl_sock);
71 if( fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0 )
72 {
73 err = -EINVAL;
74 goto err;
75 }
76
77 if( genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
78 err = -ENOMEM;
79 goto err;
80 }
81
82 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
83 if( !nls->nl80211 )
84 {
85 err = -ENOENT;
86 goto err;
87 }
88 }
89
90 return 0;
91
92
93 err:
94 nl80211_close();
95 return err;
96 }
97
98 static int nl80211_msg_error(struct sockaddr_nl *nla,
99 struct nlmsgerr *err, void *arg)
100 {
101 int *ret = arg;
102 *ret = err->error;
103 return NL_STOP;
104 }
105
106 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
107 {
108 int *ret = arg;
109 *ret = 0;
110 return NL_SKIP;
111 }
112
113 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
114 {
115 int *ret = arg;
116 *ret = 0;
117 return NL_STOP;
118 }
119
120 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
121 {
122 struct nl80211_msg_conveyor *cv = arg;
123
124 nlmsg_get(msg);
125
126 cv->msg = msg;
127 cv->hdr = nlmsg_data(nlmsg_hdr(cv->msg));
128
129 nla_parse(cv->attr, NL80211_ATTR_MAX,
130 genlmsg_attrdata(cv->hdr, 0),
131 genlmsg_attrlen(cv->hdr, 0), NULL);
132
133 return NL_SKIP;
134 }
135
136 static void nl80211_free(struct nl80211_msg_conveyor *cv)
137 {
138 if( cv )
139 {
140 if( cv->cb )
141 nl_cb_put(cv->cb);
142
143 if( cv->msg )
144 nlmsg_free(cv->msg);
145
146 cv->cb = NULL;
147 cv->msg = NULL;
148 }
149 }
150
151 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname, int cmd, int flags)
152 {
153 static struct nl80211_msg_conveyor cv;
154
155 int ifidx = -1, phyidx = -1;
156 struct nl_msg *req = NULL;
157 struct nl_cb *cb = NULL;
158
159 if( nl80211_init() < 0 )
160 goto err;
161
162 if( !strncmp(ifname, "radio", 5) )
163 phyidx = atoi(&ifname[5]);
164 else if( !strncmp(ifname, "mon.", 4) )
165 ifidx = if_nametoindex(&ifname[4]);
166 else
167 ifidx = if_nametoindex(ifname);
168
169 if( (ifidx < 0) && (phyidx < 0) )
170 return NULL;
171
172 req = nlmsg_alloc();
173 if( !req )
174 goto err;
175
176 cb = nl_cb_alloc(NL_CB_DEFAULT);
177 if( !cb )
178 goto err;
179
180 genlmsg_put(req, 0, 0, genl_family_get_id(nls->nl80211), 0,
181 flags, cmd, 0);
182
183 if( ifidx > -1 )
184 NLA_PUT_U32(req, NL80211_ATTR_IFINDEX, ifidx);
185
186 if( phyidx > -1 )
187 NLA_PUT_U32(req, NL80211_ATTR_WIPHY, phyidx);
188
189 nlmsg_get(req);
190
191 cv.msg = req;
192 cv.cb = cb;
193 cv.custom_cb = 0;
194
195 return &cv;
196
197 err:
198 nla_put_failure:
199 if( cb )
200 nl_cb_put(cb);
201
202 if( req )
203 nlmsg_free(req);
204
205 return NULL;
206 }
207
208 static void nl80211_cb(struct nl80211_msg_conveyor *cv,
209 int (*cb)(struct nl_msg *, void *), void *arg)
210 {
211 cv->custom_cb = 1;
212 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb, arg);
213 }
214
215 static struct nl80211_msg_conveyor * nl80211_send(struct nl80211_msg_conveyor *cv)
216 {
217 static struct nl80211_msg_conveyor rcv;
218 int err = 1;
219
220 if( !cv->custom_cb )
221 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
222
223 if( nl_send_auto_complete(nls->nl_sock, cv->msg) < 0 )
224 goto err;
225
226 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
227 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
228 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
229
230 while (err > 0)
231 nl_recvmsgs(nls->nl_sock, cv->cb);
232
233 return &rcv;
234
235 err:
236 nl_cb_put(cv->cb);
237 nlmsg_free(cv->msg);
238
239 return NULL;
240 }
241
242 static int nl80211_freq2channel(int freq)
243 {
244 if (freq == 2484)
245 return 14;
246
247 if (freq < 2484)
248 return (freq - 2407) / 5;
249
250 return (freq / 5) - 1000;
251 }
252
253 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
254 {
255 int i, len;
256 char lkey[64] = { 0 };
257 const char *ln = buf;
258 static char lval[256] = { 0 };
259
260 int matched_if = ifname ? 0 : 1;
261
262
263 for( i = 0, len = strlen(buf); i < len; i++ )
264 {
265 if( !lkey[0] && (buf[i] == ' ' || buf[i] == '\t') )
266 {
267 ln++;
268 }
269 else if( !lkey[0] && (buf[i] == '=') )
270 {
271 if( (&buf[i] - ln) > 0 )
272 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
273 }
274 else if( buf[i] == '\n' )
275 {
276 if( lkey[0] )
277 {
278 memcpy(lval, ln + strlen(lkey) + 1,
279 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
280
281 if( (ifname != NULL ) &&
282 (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
283 {
284 matched_if = !strcmp(lval, ifname);
285 }
286 else if( matched_if && !strcmp(lkey, key) )
287 {
288 return lval;
289 }
290 }
291
292 ln = &buf[i+1];
293 memset(lkey, 0, sizeof(lkey));
294 memset(lval, 0, sizeof(lval));
295 }
296 }
297
298 return NULL;
299 }
300
301 static char * nl80211_ifname2phy(const char *ifname)
302 {
303 static char phy[32] = { 0 };
304 struct nl80211_msg_conveyor *req, *res;
305
306 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
307 if( req )
308 {
309 res = nl80211_send(req);
310 if( res )
311 {
312 if( res->attr[NL80211_ATTR_WIPHY_NAME] )
313 {
314 snprintf(phy, sizeof(phy), "%s",
315 nla_get_string(res->attr[NL80211_ATTR_WIPHY_NAME]));
316 }
317 nl80211_free(res);
318 }
319 nl80211_free(req);
320 }
321
322 return phy[0] ? phy : NULL;
323 }
324
325 static char * nl80211_hostapd_info(const char *ifname)
326 {
327 char *phy;
328 char path[32] = { 0 };
329 static char buf[4096] = { 0 };
330 FILE *conf;
331
332 if( (phy = nl80211_ifname2phy(ifname)) != NULL )
333 {
334 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
335
336 if( (conf = fopen(path, "r")) != NULL )
337 {
338 fread(buf, sizeof(buf) - 1, 1, conf);
339 fclose(conf);
340
341 return buf;
342 }
343 }
344
345 return NULL;
346 }
347
348 static char * nl80211_wpasupp_info(const char *ifname, const char *cmd)
349 {
350 int sock = -1, len;
351 char *rv = NULL;
352 size_t remote_length, local_length;
353 static char buffer[1024] = { 0 };
354
355 struct timeval tv = { 2, 0 };
356 struct sockaddr_un local = { 0 };
357 struct sockaddr_un remote = { 0 };
358
359 fd_set rfds;
360
361 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
362 if( sock < 0 )
363 return NULL;
364
365 remote.sun_family = AF_UNIX;
366 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
367 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
368
369 if( fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0 )
370 goto out;
371
372 if( connect(sock, (struct sockaddr *) &remote, remote_length) )
373 goto out;
374
375 local.sun_family = AF_UNIX;
376 local_length = sizeof(local.sun_family) + sprintf(local.sun_path,
377 "/var/run/iwinfo-%s-%d", ifname, getpid());
378
379 if( bind(sock, (struct sockaddr *) &local, local_length) )
380 goto out;
381
382 send(sock, cmd, strlen(cmd), 0);
383
384 while( 1 )
385 {
386 FD_ZERO(&rfds);
387 FD_SET(sock, &rfds);
388
389 if( select(sock + 1, &rfds, NULL, NULL, &tv) < 0 )
390 goto out;
391
392 if( !FD_ISSET(sock, &rfds) )
393 break;
394
395 if( (len = recv(sock, buffer, sizeof(buffer), 0)) <= 0 )
396 goto out;
397
398 buffer[len] = 0;
399
400 if( buffer[0] != '<' )
401 break;
402 }
403
404 rv = buffer;
405
406 out:
407 close(sock);
408
409 if( local.sun_family )
410 unlink(local.sun_path);
411
412 return rv;
413 }
414
415 static char * nl80211_phy2ifname(const char *ifname)
416 {
417 int fd, phyidx = 0;
418 char buffer[64];
419 static char nif[IFNAMSIZ] = { 0 };
420
421 DIR *d;
422 struct dirent *e;
423
424 if( !strncmp(ifname, "radio", 5) )
425 {
426 phyidx = atoi(&ifname[5]);
427
428 if( (d = opendir("/sys/class/net")) != NULL )
429 {
430 while( (e = readdir(d)) != NULL )
431 {
432 snprintf(buffer, sizeof(buffer),
433 "/sys/class/net/%s/phy80211/index", e->d_name);
434
435 if( (fd = open(buffer, O_RDONLY)) > 0 )
436 {
437 if( (read(fd, buffer, sizeof(buffer)) > 0) &&
438 (atoi(buffer) == phyidx) )
439 {
440 strncpy(nif, e->d_name, sizeof(nif));
441 }
442
443 close(fd);
444 }
445
446 if( nif[0] )
447 break;
448 }
449
450 closedir(d);
451 }
452 }
453
454 return nif[0] ? nif : NULL;
455 }
456
457 static char * nl80211_ifadd(const char *ifname)
458 {
459 int phyidx;
460 char *rv = NULL;
461 static char nif[IFNAMSIZ] = { 0 };
462 struct nl80211_msg_conveyor *req, *res;
463
464 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
465 if( req )
466 {
467 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
468
469 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
470 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
471
472 res = nl80211_send(req);
473 if( res )
474 {
475 rv = nif;
476 nl80211_free(res);
477 }
478
479 nla_put_failure:
480 nl80211_free(req);
481 }
482
483 return rv;
484 }
485
486 static void nl80211_ifdel(const char *ifname)
487 {
488 struct nl80211_msg_conveyor *req, *res;
489
490 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
491 if( req )
492 {
493 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
494
495 nl80211_free(nl80211_send(req));
496
497 nla_put_failure:
498 nl80211_free(req);
499 }
500 }
501
502 static int nl80211_ifup(const char *ifname)
503 {
504 struct ifreq ifr;
505
506 strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
507
508 if( ioctl(nl80211_ioctlsock, SIOCGIFFLAGS, &ifr) )
509 return 0;
510
511 ifr.ifr_flags |= (IFF_UP | IFF_RUNNING);
512
513 return !ioctl(nl80211_ioctlsock, SIOCSIFFLAGS, &ifr);
514 }
515
516 static int nl80211_ifdown(const char *ifname)
517 {
518 struct ifreq ifr;
519
520 strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
521
522 if( ioctl(nl80211_ioctlsock, SIOCGIFFLAGS, &ifr) )
523 return 0;
524
525 ifr.ifr_flags &= ~(IFF_UP | IFF_RUNNING);
526
527 return !ioctl(nl80211_ioctlsock, SIOCSIFFLAGS, &ifr);
528 }
529
530 static int nl80211_ifmac(const char *ifname)
531 {
532 struct ifreq ifr;
533
534 strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
535
536 if( ioctl(nl80211_ioctlsock, SIOCGIFHWADDR, &ifr) )
537 return 0;
538
539 ifr.ifr_hwaddr.sa_data[1]++;
540 ifr.ifr_hwaddr.sa_data[2]++;
541
542 return !ioctl(nl80211_ioctlsock, SIOCSIFHWADDR, &ifr);
543 }
544
545 static void nl80211_hostapd_hup(const char *ifname)
546 {
547 int fd, pid = 0;
548 char buf[32];
549 char *phy = strncmp(ifname, "phy", 3) ? nl80211_ifname2phy(ifname) : ifname;
550
551 if( phy )
552 {
553 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
554 if( (fd = open(buf, O_RDONLY)) > 0 )
555 {
556 if( read(fd, buf, sizeof(buf)) > 0 )
557 pid = atoi(buf);
558
559 close(fd);
560 }
561
562 if( pid > 0 )
563 kill(pid, 1);
564 }
565 }
566
567
568 int nl80211_probe(const char *ifname)
569 {
570 return !!nl80211_ifname2phy(ifname);
571 }
572
573 void nl80211_close(void)
574 {
575 if( nl80211_ioctlsock > -1 )
576 {
577 close(nl80211_ioctlsock);
578 }
579
580 if( nls )
581 {
582 if( nls->nl_sock )
583 nl_socket_free(nls->nl_sock);
584
585 if( nls->nl_cache )
586 nl_cache_free(nls->nl_cache);
587
588 free(nls);
589 nls = NULL;
590 }
591 }
592
593 int nl80211_get_mode(const char *ifname, char *buf)
594 {
595 return wext_get_mode(ifname, buf);
596 }
597
598 int nl80211_get_ssid(const char *ifname, char *buf)
599 {
600 char *ssid;
601
602 if( !wext_get_ssid(ifname, buf) )
603 {
604 return 0;
605 }
606 else if( (ssid = nl80211_hostapd_info(ifname)) &&
607 (ssid = nl80211_getval(ifname, ssid, "ssid")) )
608 {
609 memcpy(buf, ssid, strlen(ssid));
610 return 0;
611 }
612
613 return -1;
614 }
615
616 int nl80211_get_bssid(const char *ifname, char *buf)
617 {
618 char *bssid;
619 unsigned char mac[6];
620
621 if( !wext_get_bssid(ifname, buf) )
622 {
623 return 0;
624 }
625 else if( (bssid = nl80211_hostapd_info(ifname)) &&
626 (bssid = nl80211_getval(ifname, bssid, "bssid")) )
627 {
628 mac[0] = strtol(&bssid[0], NULL, 16);
629 mac[1] = strtol(&bssid[3], NULL, 16);
630 mac[2] = strtol(&bssid[6], NULL, 16);
631 mac[3] = strtol(&bssid[9], NULL, 16);
632 mac[4] = strtol(&bssid[12], NULL, 16);
633 mac[5] = strtol(&bssid[15], NULL, 16);
634
635 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
636 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
637
638 return 0;
639 }
640
641 return -1;
642 }
643
644 int nl80211_get_channel(const char *ifname, int *buf)
645 {
646 return wext_get_channel(ifname, buf);
647 }
648
649 int nl80211_get_frequency(const char *ifname, int *buf)
650 {
651 return wext_get_frequency(ifname, buf);
652 }
653
654 int nl80211_get_txpower(const char *ifname, int *buf)
655 {
656 return wext_get_txpower(ifname, buf);
657 }
658
659
660 static int nl80211_get_signal_cb(struct nl_msg *msg, void *arg)
661 {
662 int8_t dbm;
663 int16_t mbit;
664 struct nl80211_rssi_rate *rr = arg;
665
666 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
667 struct nlattr *attr[NL80211_ATTR_MAX + 1];
668 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
669 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
670
671 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
672 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
673 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
674 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
675 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
676 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
677 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
678 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
679 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
680 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
681 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
682 };
683
684 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
685 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
686 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
687 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
688 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
689 };
690
691 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
692 genlmsg_attrlen(gnlh, 0), NULL);
693
694 if( attr[NL80211_ATTR_STA_INFO] )
695 {
696 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
697 attr[NL80211_ATTR_STA_INFO], stats_policy) )
698 {
699 if( sinfo[NL80211_STA_INFO_SIGNAL] )
700 {
701 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
702 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
703 }
704
705 if( sinfo[NL80211_STA_INFO_TX_BITRATE] )
706 {
707 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
708 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
709 {
710 if( rinfo[NL80211_RATE_INFO_BITRATE] )
711 {
712 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
713 rr->rate = rr->rate
714 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
715 }
716 }
717 }
718 }
719 }
720
721 return NL_SKIP;
722 }
723
724 int nl80211_get_bitrate(const char *ifname, int *buf)
725 {
726 struct nl80211_rssi_rate rr;
727 struct nl80211_msg_conveyor *req;
728
729 if( !wext_get_bitrate(ifname, buf) )
730 return 0;
731
732 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
733 if( req )
734 {
735 rr.rssi = 0;
736 rr.rate = 0;
737
738 nl80211_cb(req, nl80211_get_signal_cb, &rr);
739 nl80211_send(req);
740 nl80211_free(req);
741
742 if( rr.rate )
743 {
744 *buf = (rr.rate * 100);
745 return 0;
746 }
747 }
748
749 return -1;
750 }
751
752 int nl80211_get_signal(const char *ifname, int *buf)
753 {
754 struct nl80211_rssi_rate rr;
755 struct nl80211_msg_conveyor *req;
756
757 if( !wext_get_signal(ifname, buf) )
758 return 0;
759
760 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
761 if( req )
762 {
763 rr.rssi = 0;
764 rr.rate = 0;
765
766 nl80211_cb(req, nl80211_get_signal_cb, &rr);
767 nl80211_send(req);
768 nl80211_free(req);
769
770 if( rr.rssi )
771 {
772 *buf = rr.rssi;
773 return 0;
774 }
775 }
776
777 return -1;
778 }
779
780 int nl80211_get_noise(const char *ifname, int *buf)
781 {
782 int rv = -1;
783 struct nl80211_msg_conveyor *req, *res;
784 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
785
786 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
787 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
788 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
789 };
790
791 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
792 if( req )
793 {
794 res = nl80211_send(req);
795 if( res )
796 {
797 if( res->attr[NL80211_ATTR_SURVEY_INFO] )
798 {
799 if( !nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
800 res->attr[NL80211_ATTR_SURVEY_INFO], sp) &&
801 si[NL80211_SURVEY_INFO_NOISE] )
802 {
803 *buf = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
804 rv = 0;
805 }
806 }
807 nl80211_free(res);
808 }
809 nl80211_free(req);
810 }
811
812 return rv;
813 }
814
815 int nl80211_get_quality(const char *ifname, int *buf)
816 {
817 int signal;
818
819 if( wext_get_quality(ifname, buf) )
820 {
821 *buf = 0;
822
823 if( !nl80211_get_signal(ifname, &signal) )
824 {
825 /* A positive signal level is usually just a quality
826 * value, pass through as-is */
827 if( signal >= 0 )
828 {
829 *buf = signal;
830 }
831
832 /* The cfg80211 wext compat layer assumes a signal range
833 * of -110 dBm to -40 dBm, the quality value is derived
834 * by adding 110 to the signal level */
835 else
836 {
837 if( signal < -110 )
838 signal = -110;
839 else if( signal > -40 )
840 signal = -40;
841
842 *buf = (signal + 110);
843 }
844 }
845 }
846
847 return 0;
848 }
849
850 int nl80211_get_quality_max(const char *ifname, int *buf)
851 {
852 if( wext_get_quality_max(ifname, buf) )
853 /* The cfg80211 wext compat layer assumes a maximum
854 * quality of 70 */
855 *buf = 70;
856
857 return 0;
858 }
859
860 int nl80211_get_encryption(const char *ifname, char *buf)
861 {
862 int i;
863 char k[9];
864 char *val, *res;
865 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
866
867 /* Hostapd */
868 if( (res = nl80211_hostapd_info(ifname)) )
869 {
870 if( (val = nl80211_getval(ifname, res, "auth_algs")) && (val > 0) )
871 {
872 c->auth_suites |= IWINFO_KMGMT_NONE;
873
874 switch(atoi(val)) {
875 case 1:
876 c->auth_algs |= IWINFO_AUTH_OPEN;
877 break;
878
879 case 2:
880 c->auth_algs |= IWINFO_AUTH_SHARED;
881 break;
882
883 case 3:
884 c->auth_algs |= IWINFO_AUTH_OPEN;
885 c->auth_algs |= IWINFO_AUTH_SHARED;
886 break;
887
888 default:
889 break;
890 }
891
892 for( i = 0; i < 4; i++ )
893 {
894 snprintf(k, sizeof(k), "wep_key%d", i);
895
896 if( (val = nl80211_getval(ifname, res, k)) )
897 {
898 if( (strlen(val) == 5) || (strlen(val) == 10) )
899 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
900
901 else if( (strlen(val) == 13) || (strlen(val) == 26) )
902 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
903 }
904 }
905
906 c->group_ciphers = c->pair_ciphers;
907
908 return 0;
909 }
910
911
912 if( (val = nl80211_getval(ifname, res, "wpa")) != NULL )
913 c->wpa_version = atoi(val);
914
915
916 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
917
918 if( !val || strstr(val, "PSK") )
919 c->auth_suites |= IWINFO_KMGMT_PSK;
920
921 if( val && strstr(val, "EAP") )
922 c->auth_suites |= IWINFO_KMGMT_8021x;
923
924 if( val && strstr(val, "NONE") )
925 c->auth_suites |= IWINFO_KMGMT_NONE;
926
927
928 if( (val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL )
929 {
930 if( strstr(val, "TKIP") )
931 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
932
933 if( strstr(val, "CCMP") )
934 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
935
936 if( strstr(val, "NONE") )
937 c->pair_ciphers |= IWINFO_CIPHER_NONE;
938 }
939
940
941 c->group_ciphers = c->pair_ciphers;
942 c->enabled = (c->auth_algs || c->auth_suites) ? 1 : 0;
943
944 return 0;
945 }
946
947 /* WPA supplicant */
948 else if( (res = nl80211_wpasupp_info(ifname, "STATUS")) &&
949 (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
950 {
951 /* WEP */
952 if( strstr(val, "WEP") )
953 {
954 if( strstr(val, "WEP-40") )
955 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
956
957 else if( strstr(val, "WEP-104") )
958 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
959
960 c->enabled = 1;
961 c->group_ciphers = c->pair_ciphers;
962
963 c->auth_suites |= IWINFO_KMGMT_NONE;
964 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
965 }
966
967 /* WPA */
968 else
969 {
970 if( strstr(val, "TKIP") )
971 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
972
973 else if( strstr(val, "CCMP") )
974 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
975
976 else if( strstr(val, "NONE") )
977 c->pair_ciphers |= IWINFO_CIPHER_NONE;
978
979 else if( strstr(val, "WEP-40") )
980 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
981
982 else if( strstr(val, "WEP-104") )
983 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
984
985
986 if( (val = nl80211_getval(NULL, res, "group_cipher")) )
987 {
988 if( strstr(val, "TKIP") )
989 c->group_ciphers |= IWINFO_CIPHER_TKIP;
990
991 else if( strstr(val, "CCMP") )
992 c->group_ciphers |= IWINFO_CIPHER_CCMP;
993
994 else if( strstr(val, "NONE") )
995 c->group_ciphers |= IWINFO_CIPHER_NONE;
996
997 else if( strstr(val, "WEP-40") )
998 c->group_ciphers |= IWINFO_CIPHER_WEP40;
999
1000 else if( strstr(val, "WEP-104") )
1001 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1002 }
1003
1004
1005 if( (val = nl80211_getval(NULL, res, "key_mgmt")) )
1006 {
1007 if( strstr(val, "WPA2") )
1008 c->wpa_version = 2;
1009
1010 else if( strstr(val, "WPA") )
1011 c->wpa_version = 1;
1012
1013
1014 if( strstr(val, "PSK") )
1015 c->auth_suites |= IWINFO_KMGMT_PSK;
1016
1017 else if( strstr(val, "EAP") || strstr(val, "802.1X") )
1018 c->auth_suites |= IWINFO_KMGMT_8021x;
1019
1020 else if( strstr(val, "NONE") )
1021 c->auth_suites |= IWINFO_KMGMT_NONE;
1022 }
1023
1024 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1025 }
1026
1027 return 0;
1028 }
1029
1030 return -1;
1031 }
1032
1033
1034 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1035 {
1036 struct nl80211_assoc_count *ac = arg;
1037 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1038 struct nlattr *attr[NL80211_ATTR_MAX + 1];
1039 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1040
1041 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1042 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1043 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1044 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1045 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1046 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1047 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1048 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1049 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1050 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1051 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1052 };
1053
1054 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1055 genlmsg_attrlen(gnlh, 0), NULL);
1056
1057 if( attr[NL80211_ATTR_MAC] )
1058 memcpy(ac->entry->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1059
1060 if( attr[NL80211_ATTR_STA_INFO] )
1061 {
1062 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1063 attr[NL80211_ATTR_STA_INFO], stats_policy) )
1064 {
1065 if( sinfo[NL80211_STA_INFO_SIGNAL] )
1066 ac->entry->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1067 }
1068 }
1069
1070 ac->entry->noise = ac->noise;
1071 ac->entry++;
1072 ac->count++;
1073
1074 return NL_SKIP;
1075 }
1076
1077 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1078 {
1079 struct nl80211_assoc_count ac;
1080 struct nl80211_msg_conveyor *req;
1081
1082 nl80211_get_noise(ifname, &ac.noise);
1083
1084 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
1085 if( req )
1086 {
1087 ac.count = 0;
1088 ac.entry = (struct iwinfo_assoclist_entry *)buf;
1089
1090 nl80211_cb(req, nl80211_get_assoclist_cb, &ac);
1091 nl80211_send(req);
1092 nl80211_free(req);
1093
1094 *len = (ac.count * sizeof(struct iwinfo_assoclist_entry));
1095 return 0;
1096 }
1097
1098 return -1;
1099 }
1100
1101 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1102 {
1103 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1104 int dbm_max = -1, dbm_cur, dbm_cnt;
1105 struct nl80211_msg_conveyor *req, *res;
1106 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1107 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1108 struct nlattr *band, *freq;
1109 struct iwinfo_txpwrlist_entry entry;
1110
1111 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1112 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1113 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1114 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1115 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1116 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1117 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1118 };
1119
1120 if( nl80211_get_channel(ifname, &ch_cur) )
1121 ch_cur = 0;
1122
1123 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1124 if( req )
1125 {
1126 res = nl80211_send(req);
1127 if( res )
1128 {
1129 nla_for_each_nested(band,
1130 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1131 {
1132 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1133 nla_len(band), NULL);
1134
1135 nla_for_each_nested(freq,
1136 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1137 {
1138 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1139 nla_data(freq), nla_len(freq), freq_policy);
1140
1141 ch_cmp = nl80211_freq2channel(
1142 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1143
1144 if( (!ch_cur || (ch_cmp == ch_cur)) &&
1145 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1146 {
1147 dbm_max = (int)(0.01 * nla_get_u32(
1148 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1149
1150 break;
1151 }
1152 }
1153 }
1154
1155 nl80211_free(res);
1156 }
1157 nl80211_free(req);
1158 }
1159
1160 if( dbm_max > -1 )
1161 {
1162 for( dbm_cur = 0, dbm_cnt = 0;
1163 dbm_cur < dbm_max;
1164 dbm_cur += 2, dbm_cnt++ )
1165 {
1166 entry.dbm = dbm_cur;
1167 entry.mw = wext_dbm2mw(dbm_cur);
1168
1169 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1170 }
1171
1172 entry.dbm = dbm_max;
1173 entry.mw = wext_dbm2mw(dbm_max);
1174
1175 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1176 dbm_cnt++;
1177
1178 *len = dbm_cnt * sizeof(entry);
1179 return 0;
1180 }
1181
1182 return -1;
1183 }
1184
1185 static void nl80211_get_scancrypto(const char *spec,
1186 struct iwinfo_crypto_entry *c)
1187 {
1188 if( strstr(spec, "OPEN") )
1189 {
1190 c->enabled = 0;
1191 }
1192 else
1193 {
1194 c->enabled = 1;
1195
1196 if( strstr(spec, "WPA2-") && strstr(spec, "WPA-") )
1197 c->wpa_version = 3;
1198
1199 else if( strstr(spec, "WPA2") )
1200 c->wpa_version = 2;
1201
1202 else if( strstr(spec, "WPA") )
1203 c->wpa_version = 1;
1204
1205 else if( strstr(spec, "WEP") )
1206 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1207
1208
1209 if( strstr(spec, "PSK") )
1210 c->auth_suites |= IWINFO_KMGMT_PSK;
1211
1212 if( strstr(spec, "802.1X") || strstr(spec, "EAP") )
1213 c->auth_suites |= IWINFO_KMGMT_8021x;
1214
1215 if( strstr(spec, "WPA-NONE") )
1216 c->auth_suites |= IWINFO_KMGMT_NONE;
1217
1218
1219 if( strstr(spec, "TKIP") )
1220 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1221
1222 if( strstr(spec, "CCMP") )
1223 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1224
1225 if( strstr(spec, "WEP-40") )
1226 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1227
1228 if( strstr(spec, "WEP-104") )
1229 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1230
1231 c->group_ciphers = c->pair_ciphers;
1232 }
1233 }
1234
1235 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1236 {
1237 int freq, rssi, qmax, count;
1238 char *res;
1239 char ssid[128] = { 0 };
1240 char bssid[18] = { 0 };
1241 char cipher[256] = { 0 };
1242
1243 /* Got a radioX pseudo interface, find some interface on it or create one */
1244 if( !strncmp(ifname, "radio", 5) )
1245 {
1246 /* Reuse existing interface */
1247 if( (res = nl80211_phy2ifname(ifname)) != NULL )
1248 {
1249 return nl80211_get_scanlist(res, buf, len);
1250 }
1251
1252 /* Need to spawn a temporary iface for scanning */
1253 else if( (res = nl80211_ifadd(ifname)) != NULL )
1254 {
1255 count = nl80211_get_scanlist(res, buf, len);
1256 nl80211_ifdel(res);
1257 return count;
1258 }
1259 }
1260
1261 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1262
1263 /* WPA supplicant */
1264 if( (res = nl80211_wpasupp_info(ifname, "SCAN")) &&
1265 !strcmp(res, "OK\n") )
1266 {
1267 sleep(2);
1268
1269 if( (res = nl80211_wpasupp_info(ifname, "SCAN_RESULTS")) )
1270 {
1271 nl80211_get_quality_max(ifname, &qmax);
1272
1273 /* skip header line */
1274 while( *res++ != '\n' );
1275
1276 count = 0;
1277
1278 while( sscanf(res, "%17s %d %d %255s %127[^\n]\n",
1279 bssid, &freq, &rssi, cipher, ssid) > 0 )
1280 {
1281 /* BSSID */
1282 e->mac[0] = strtol(&bssid[0], NULL, 16);
1283 e->mac[1] = strtol(&bssid[3], NULL, 16);
1284 e->mac[2] = strtol(&bssid[6], NULL, 16);
1285 e->mac[3] = strtol(&bssid[9], NULL, 16);
1286 e->mac[4] = strtol(&bssid[12], NULL, 16);
1287 e->mac[5] = strtol(&bssid[15], NULL, 16);
1288
1289 /* SSID */
1290 memcpy(e->ssid, ssid,
1291 min(strlen(ssid), sizeof(e->ssid) - 1));
1292
1293 /* Mode (assume master) */
1294 sprintf((char *)e->mode, "Master");
1295
1296 /* Channel */
1297 e->channel = nl80211_freq2channel(freq);
1298
1299 /* Signal */
1300 e->signal = rssi;
1301
1302 /* Quality */
1303 if( rssi < 0 )
1304 {
1305 /* The cfg80211 wext compat layer assumes a signal range
1306 * of -110 dBm to -40 dBm, the quality value is derived
1307 * by adding 110 to the signal level */
1308 if( rssi < -110 )
1309 rssi = -110;
1310 else if( rssi > -40 )
1311 rssi = -40;
1312
1313 e->quality = (rssi + 110);
1314 }
1315 else
1316 {
1317 e->quality = rssi;
1318 }
1319
1320 /* Max. Quality */
1321 e->quality_max = qmax;
1322
1323 /* Crypto */
1324 nl80211_get_scancrypto(cipher, &e->crypto);
1325
1326 /* advance to next line */
1327 while( *res && *res++ != '\n' );
1328
1329 count++;
1330 e++;
1331 }
1332
1333 *len = count * sizeof(struct iwinfo_scanlist_entry);
1334 return 0;
1335 }
1336 }
1337
1338 /* AP scan */
1339 else
1340 {
1341 /* Got a temp interface, don't create yet another one */
1342 if( !strncmp(ifname, "tmp.", 4) )
1343 {
1344 if( !nl80211_ifup(ifname) )
1345 return -1;
1346
1347 wext_get_scanlist(ifname, buf, len);
1348 nl80211_ifdown(ifname);
1349 return 0;
1350 }
1351
1352 /* Spawn a new scan interface */
1353 else
1354 {
1355 if( !(res = nl80211_ifadd(ifname)) )
1356 goto out;
1357
1358 if( !nl80211_ifmac(res) )
1359 goto out;
1360
1361 /* if we can take the new interface up, the driver supports an
1362 * additional interface and there's no need to tear down the ap */
1363 if( nl80211_ifup(res) )
1364 {
1365 wext_get_scanlist(res, buf, len);
1366 nl80211_ifdown(res);
1367 }
1368
1369 /* driver cannot create secondary interface, take down ap
1370 * during scan */
1371 else if( nl80211_ifdown(ifname) && nl80211_ifup(res) )
1372 {
1373 wext_get_scanlist(res, buf, len);
1374 nl80211_ifdown(res);
1375 nl80211_ifup(ifname);
1376 nl80211_hostapd_hup(ifname);
1377 }
1378
1379 out:
1380 nl80211_ifdel(res);
1381 return 0;
1382 }
1383 }
1384
1385 return -1;
1386 }
1387
1388 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1389 {
1390 int count = 0, bands_remain, freqs_remain;
1391 struct nl80211_msg_conveyor *req, *res;
1392 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1393 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1394 struct nlattr *band, *freq;
1395 struct iwinfo_freqlist_entry *e = (struct iwinfo_freqlist_entry *)buf;
1396
1397 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1398 if( req )
1399 {
1400 res = nl80211_send(req);
1401 if( res )
1402 {
1403 nla_for_each_nested(band,
1404 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1405 {
1406 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1407 nla_len(band), NULL);
1408
1409 nla_for_each_nested(freq,
1410 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1411 {
1412 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1413 nla_data(freq), nla_len(freq), NULL);
1414
1415 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1416 freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1417 continue;
1418
1419 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1420 e->channel = nl80211_freq2channel(e->mhz);
1421
1422 e->restricted = (
1423 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1424 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
1425 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1426 ) ? 1 : 0;
1427
1428 e++;
1429 count++;
1430 }
1431 }
1432 nl80211_free(res);
1433 }
1434 nl80211_free(req);
1435 }
1436
1437 if( count > 0 )
1438 {
1439 *len = count * sizeof(struct iwinfo_freqlist_entry);
1440 return 0;
1441 }
1442
1443 return -1;
1444 }
1445
1446 int nl80211_get_country(const char *ifname, char *buf)
1447 {
1448 int rv = -1;
1449 struct nl80211_msg_conveyor *req, *res;
1450
1451 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1452 if( req )
1453 {
1454 res = nl80211_send(req);
1455 if( res )
1456 {
1457 if( res->attr[NL80211_ATTR_REG_ALPHA2] )
1458 {
1459 memcpy(buf, nla_data(res->attr[NL80211_ATTR_REG_ALPHA2]), 2);
1460 rv = 0;
1461 }
1462 nl80211_free(res);
1463 }
1464 nl80211_free(req);
1465 }
1466
1467 return rv;
1468 }
1469
1470 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1471 {
1472 int i, count;
1473 struct iwinfo_iso3166_label *l;
1474 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1475
1476 for( l = ISO3166_Names, count = 0; l->iso3166; l++, e++, count++ )
1477 {
1478 e->iso3166 = l->iso3166;
1479 e->ccode[0] = (l->iso3166 / 256);
1480 e->ccode[1] = (l->iso3166 % 256);
1481 }
1482
1483 *len = (count * sizeof(struct iwinfo_country_entry));
1484 return 0;
1485 }
1486
1487 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1488 {
1489 int bands_remain, freqs_remain;
1490 struct nl80211_msg_conveyor *req, *res;
1491 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1492 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1493 struct nlattr *band, *freq;
1494 uint16_t caps = 0;
1495
1496 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1497 if( req )
1498 {
1499 res = nl80211_send(req);
1500 if( res )
1501 {
1502 nla_for_each_nested(band,
1503 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1504 {
1505 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1506 nla_len(band), NULL);
1507
1508 if( bands[NL80211_BAND_ATTR_HT_CAPA] )
1509 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1510
1511 /* Treat HT20/HT40 as 11n */
1512 if( caps & (1 << 1) )
1513 *buf |= IWINFO_80211_N;
1514
1515 nla_for_each_nested(freq,
1516 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1517 {
1518 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1519 nla_data(freq), nla_len(freq), NULL);
1520
1521 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] )
1522 continue;
1523
1524 if( nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485 )
1525 {
1526 *buf |= IWINFO_80211_B;
1527 *buf |= IWINFO_80211_G;
1528 }
1529 else
1530 {
1531 *buf |= IWINFO_80211_A;
1532 }
1533 }
1534 }
1535 nl80211_free(res);
1536 }
1537 nl80211_free(req);
1538 }
1539
1540 return *buf ? 0 : -1;
1541 }
1542
1543 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1544 {
1545 /* We assume that multi bssid is always possible */
1546 *buf = 1;
1547 return 0;
1548 }
Lua Configuration Interface (mirror)