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[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
33 static int nl80211_init(void)
34 {
35 int err, fd;
36
37 if( !nls )
38 {
39 nls = malloc(sizeof(struct nl80211_state));
40 if( !nls ) {
41 err = -ENOMEM;
42 goto err;
43 }
44
45 nls->nl_sock = nl_socket_alloc();
46 if( !nls->nl_sock ) {
47 err = -ENOMEM;
48 goto err;
49 }
50
51 if( genl_connect(nls->nl_sock)) {
52 err = -ENOLINK;
53 goto err;
54 }
55
56 fd = nl_socket_get_fd(nls->nl_sock);
57 if( fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0 )
58 {
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 {
71 err = -ENOENT;
72 goto err;
73 }
74 }
75
76 return 0;
77
78
79 err:
80 nl80211_close();
81 return err;
82 }
83
84 static int nl80211_msg_error(struct sockaddr_nl *nla,
85 struct nlmsgerr *err, void *arg)
86 {
87 int *ret = arg;
88 *ret = err->error;
89 return NL_STOP;
90 }
91
92 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
93 {
94 int *ret = arg;
95 *ret = 0;
96 return NL_SKIP;
97 }
98
99 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
100 {
101 int *ret = arg;
102 *ret = 0;
103 return NL_STOP;
104 }
105
106 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
107 {
108 struct nl80211_msg_conveyor *cv = arg;
109
110 nlmsg_get(msg);
111
112 cv->msg = msg;
113 cv->hdr = nlmsg_data(nlmsg_hdr(cv->msg));
114
115 nla_parse(cv->attr, NL80211_ATTR_MAX,
116 genlmsg_attrdata(cv->hdr, 0),
117 genlmsg_attrlen(cv->hdr, 0), NULL);
118
119 return NL_SKIP;
120 }
121
122 static void nl80211_free(struct nl80211_msg_conveyor *cv)
123 {
124 if( cv )
125 {
126 if( cv->cb )
127 nl_cb_put(cv->cb);
128
129 if( cv->msg )
130 nlmsg_free(cv->msg);
131
132 cv->cb = NULL;
133 cv->msg = NULL;
134 }
135 }
136
137 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname, int cmd, int flags)
138 {
139 static struct nl80211_msg_conveyor cv;
140
141 int ifidx = -1, phyidx = -1;
142 struct nl_msg *req = NULL;
143 struct nl_cb *cb = NULL;
144
145 if( nl80211_init() < 0 )
146 goto err;
147
148 if( !strncmp(ifname, "phy", 3) )
149 phyidx = atoi(&ifname[3]);
150 else if( !strncmp(ifname, "radio", 5) )
151 phyidx = atoi(&ifname[5]);
152 else if( !strncmp(ifname, "mon.", 4) )
153 ifidx = if_nametoindex(&ifname[4]);
154 else
155 ifidx = if_nametoindex(ifname);
156
157 if( (ifidx < 0) && (phyidx < 0) )
158 return NULL;
159
160 req = nlmsg_alloc();
161 if( !req )
162 goto err;
163
164 cb = nl_cb_alloc(NL_CB_DEFAULT);
165 if( !cb )
166 goto err;
167
168 genlmsg_put(req, 0, 0, genl_family_get_id(nls->nl80211), 0,
169 flags, cmd, 0);
170
171 if( ifidx > -1 )
172 NLA_PUT_U32(req, NL80211_ATTR_IFINDEX, ifidx);
173
174 if( phyidx > -1 )
175 NLA_PUT_U32(req, NL80211_ATTR_WIPHY, phyidx);
176
177 nlmsg_get(req);
178
179 cv.msg = req;
180 cv.cb = cb;
181 cv.custom_cb = 0;
182
183 return &cv;
184
185 err:
186 nla_put_failure:
187 if( cb )
188 nl_cb_put(cb);
189
190 if( req )
191 nlmsg_free(req);
192
193 return NULL;
194 }
195
196 static void nl80211_cb(struct nl80211_msg_conveyor *cv,
197 int (*cb)(struct nl_msg *, void *), void *arg)
198 {
199 cv->custom_cb = 1;
200 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb, arg);
201 }
202
203 static struct nl80211_msg_conveyor * nl80211_send(struct nl80211_msg_conveyor *cv)
204 {
205 static struct nl80211_msg_conveyor rcv;
206 int err = 1;
207
208 if( !cv->custom_cb )
209 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
210
211 if( nl_send_auto_complete(nls->nl_sock, cv->msg) < 0 )
212 goto err;
213
214 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
215 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
216 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
217
218 while (err > 0)
219 nl_recvmsgs(nls->nl_sock, cv->cb);
220
221 return &rcv;
222
223 err:
224 nl_cb_put(cv->cb);
225 nlmsg_free(cv->msg);
226
227 return NULL;
228 }
229
230 static int nl80211_freq2channel(int freq)
231 {
232 if (freq == 2484)
233 return 14;
234
235 if (freq < 2484)
236 return (freq - 2407) / 5;
237
238 return (freq / 5) - 1000;
239 }
240
241 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
242 {
243 int i, len;
244 char lkey[64] = { 0 };
245 const char *ln = buf;
246 static char lval[256] = { 0 };
247
248 int matched_if = ifname ? 0 : 1;
249
250
251 for( i = 0, len = strlen(buf); i < len; i++ )
252 {
253 if( !lkey[0] && (buf[i] == ' ' || buf[i] == '\t') )
254 {
255 ln++;
256 }
257 else if( !lkey[0] && (buf[i] == '=') )
258 {
259 if( (&buf[i] - ln) > 0 )
260 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
261 }
262 else if( buf[i] == '\n' )
263 {
264 if( lkey[0] )
265 {
266 memcpy(lval, ln + strlen(lkey) + 1,
267 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
268
269 if( (ifname != NULL ) &&
270 (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
271 {
272 matched_if = !strcmp(lval, ifname);
273 }
274 else if( matched_if && !strcmp(lkey, key) )
275 {
276 return lval;
277 }
278 }
279
280 ln = &buf[i+1];
281 memset(lkey, 0, sizeof(lkey));
282 memset(lval, 0, sizeof(lval));
283 }
284 }
285
286 return NULL;
287 }
288
289 static char * nl80211_ifname2phy(const char *ifname)
290 {
291 static char phy[32] = { 0 };
292 struct nl80211_msg_conveyor *req, *res;
293
294 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
295 if( req )
296 {
297 res = nl80211_send(req);
298 if( res )
299 {
300 if( res->attr[NL80211_ATTR_WIPHY_NAME] )
301 {
302 snprintf(phy, sizeof(phy), "%s",
303 nla_get_string(res->attr[NL80211_ATTR_WIPHY_NAME]));
304 }
305 nl80211_free(res);
306 }
307 nl80211_free(req);
308 }
309
310 return phy[0] ? phy : NULL;
311 }
312
313 static char * nl80211_hostapd_info(const char *ifname)
314 {
315 char *phy;
316 char path[32] = { 0 };
317 static char buf[4096] = { 0 };
318 FILE *conf;
319
320 if( (phy = nl80211_ifname2phy(ifname)) != NULL )
321 {
322 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
323
324 if( (conf = fopen(path, "r")) != NULL )
325 {
326 fread(buf, sizeof(buf) - 1, 1, conf);
327 fclose(conf);
328
329 return buf;
330 }
331 }
332
333 return NULL;
334 }
335
336 static char * nl80211_wpasupp_info(const char *ifname, const char *cmd)
337 {
338 int sock = -1, len;
339 char *rv = NULL;
340 size_t remote_length, local_length;
341 static char buffer[1024] = { 0 };
342
343 struct timeval tv = { 2, 0 };
344 struct sockaddr_un local = { 0 };
345 struct sockaddr_un remote = { 0 };
346
347 fd_set rfds;
348
349 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
350 if( sock < 0 )
351 return NULL;
352
353 remote.sun_family = AF_UNIX;
354 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
355 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
356
357 if( fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0 )
358 goto out;
359
360 if( connect(sock, (struct sockaddr *) &remote, remote_length) )
361 goto out;
362
363 local.sun_family = AF_UNIX;
364 local_length = sizeof(local.sun_family) + sprintf(local.sun_path,
365 "/var/run/iwinfo-%s-%d", ifname, getpid());
366
367 if( bind(sock, (struct sockaddr *) &local, local_length) )
368 goto out;
369
370 send(sock, cmd, strlen(cmd), 0);
371
372 while( 1 )
373 {
374 FD_ZERO(&rfds);
375 FD_SET(sock, &rfds);
376
377 if( select(sock + 1, &rfds, NULL, NULL, &tv) < 0 )
378 goto out;
379
380 if( !FD_ISSET(sock, &rfds) )
381 break;
382
383 if( (len = recv(sock, buffer, sizeof(buffer), 0)) <= 0 )
384 goto out;
385
386 buffer[len] = 0;
387
388 if( buffer[0] != '<' )
389 break;
390 }
391
392 rv = buffer;
393
394 out:
395 close(sock);
396
397 if( local.sun_family )
398 unlink(local.sun_path);
399
400 return rv;
401 }
402
403 static inline int nl80211_readint(const char *path)
404 {
405 int fd;
406 int rv = -1;
407 char buffer[16];
408
409 if( (fd = open(path, O_RDONLY)) > -1 )
410 {
411 if( read(fd, buffer, sizeof(buffer)) > 0 )
412 rv = atoi(buffer);
413
414 close(fd);
415 }
416
417 return rv;
418 }
419
420 static char * nl80211_phy2ifname(const char *ifname)
421 {
422 int fd, ifidx = -1, cifidx = -1, phyidx = -1;
423 char buffer[64];
424 static char nif[IFNAMSIZ] = { 0 };
425
426 DIR *d;
427 struct dirent *e;
428
429 if( !strncmp(ifname, "phy", 3) )
430 phyidx = atoi(&ifname[3]);
431 else if( !strncmp(ifname, "radio", 5) )
432 phyidx = atoi(&ifname[5]);
433
434 if( phyidx > -1 )
435 {
436 if( (d = opendir("/sys/class/net")) != NULL )
437 {
438 while( (e = readdir(d)) != NULL )
439 {
440 snprintf(buffer, sizeof(buffer),
441 "/sys/class/net/%s/phy80211/index", e->d_name);
442
443 if( nl80211_readint(buffer) == phyidx )
444 {
445 snprintf(buffer, sizeof(buffer),
446 "/sys/class/net/%s/ifindex", e->d_name);
447
448 if( (cifidx = nl80211_readint(buffer)) >= 0 &&
449 ((ifidx < 0) || (cifidx < ifidx)) )
450 {
451 ifidx = cifidx;
452 strncpy(nif, e->d_name, sizeof(nif));
453 }
454 }
455 }
456
457 closedir(d);
458 }
459 }
460
461 return nif[0] ? nif : NULL;
462 }
463
464 static char * nl80211_ifadd(const char *ifname)
465 {
466 int phyidx;
467 char *rv = NULL;
468 static char nif[IFNAMSIZ] = { 0 };
469 struct nl80211_msg_conveyor *req, *res;
470
471 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
472 if( req )
473 {
474 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
475
476 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
477 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
478
479 res = nl80211_send(req);
480 if( res )
481 {
482 rv = nif;
483 nl80211_free(res);
484 }
485
486 nla_put_failure:
487 nl80211_free(req);
488 }
489
490 return rv;
491 }
492
493 static void nl80211_ifdel(const char *ifname)
494 {
495 struct nl80211_msg_conveyor *req;
496
497 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
498 if( req )
499 {
500 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
501
502 nl80211_free(nl80211_send(req));
503
504 nla_put_failure:
505 nl80211_free(req);
506 }
507 }
508
509 static void nl80211_hostapd_hup(const char *ifname)
510 {
511 int fd, pid = 0;
512 char buf[32];
513 char *phy = nl80211_ifname2phy(ifname);
514
515 if( phy )
516 {
517 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
518 if( (fd = open(buf, O_RDONLY)) > 0 )
519 {
520 if( read(fd, buf, sizeof(buf)) > 0 )
521 pid = atoi(buf);
522
523 close(fd);
524 }
525
526 if( pid > 0 )
527 kill(pid, 1);
528 }
529 }
530
531
532 int nl80211_probe(const char *ifname)
533 {
534 return !!nl80211_ifname2phy(ifname);
535 }
536
537 void nl80211_close(void)
538 {
539 if( nls )
540 {
541 if( nls->nl_sock )
542 nl_socket_free(nls->nl_sock);
543
544 if( nls->nl_cache )
545 nl_cache_free(nls->nl_cache);
546
547 free(nls);
548 nls = NULL;
549 }
550 }
551
552 int nl80211_get_mode(const char *ifname, char *buf)
553 {
554 return wext_get_mode(ifname, buf);
555 }
556
557 int nl80211_get_ssid(const char *ifname, char *buf)
558 {
559 char *ssid;
560
561 if( !wext_get_ssid(ifname, buf) )
562 {
563 return 0;
564 }
565 else if( (ssid = nl80211_hostapd_info(ifname)) &&
566 (ssid = nl80211_getval(ifname, ssid, "ssid")) )
567 {
568 memcpy(buf, ssid, strlen(ssid));
569 return 0;
570 }
571
572 return -1;
573 }
574
575 int nl80211_get_bssid(const char *ifname, char *buf)
576 {
577 char *bssid;
578 unsigned char mac[6];
579
580 if( !wext_get_bssid(ifname, buf) )
581 {
582 return 0;
583 }
584 else if( (bssid = nl80211_hostapd_info(ifname)) &&
585 (bssid = nl80211_getval(ifname, bssid, "bssid")) )
586 {
587 mac[0] = strtol(&bssid[0], NULL, 16);
588 mac[1] = strtol(&bssid[3], NULL, 16);
589 mac[2] = strtol(&bssid[6], NULL, 16);
590 mac[3] = strtol(&bssid[9], NULL, 16);
591 mac[4] = strtol(&bssid[12], NULL, 16);
592 mac[5] = strtol(&bssid[15], NULL, 16);
593
594 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
595 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
596
597 return 0;
598 }
599
600 return -1;
601 }
602
603 int nl80211_get_channel(const char *ifname, int *buf)
604 {
605 char *first;
606
607 if( wext_get_channel(ifname, buf) &&
608 NULL != (first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) )
609 {
610 return wext_get_channel(first, buf);
611 }
612
613 return -1;
614 }
615
616 int nl80211_get_frequency(const char *ifname, int *buf)
617 {
618 char *first;
619
620 if( wext_get_channel(ifname, buf) &&
621 NULL != (first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) )
622 {
623 return wext_get_frequency(first, buf);
624 }
625
626 return -1;
627 }
628
629 int nl80211_get_txpower(const char *ifname, int *buf)
630 {
631 return wext_get_txpower(ifname, buf);
632 }
633
634
635 static int nl80211_get_signal_cb(struct nl_msg *msg, void *arg)
636 {
637 int8_t dbm;
638 int16_t mbit;
639 struct nl80211_rssi_rate *rr = arg;
640
641 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
642 struct nlattr *attr[NL80211_ATTR_MAX + 1];
643 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
644 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
645
646 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
647 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
648 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
649 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
650 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
651 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
652 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
653 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
654 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
655 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
656 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
657 };
658
659 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
660 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
661 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
662 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
663 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
664 };
665
666 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
667 genlmsg_attrlen(gnlh, 0), NULL);
668
669 if( attr[NL80211_ATTR_STA_INFO] )
670 {
671 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
672 attr[NL80211_ATTR_STA_INFO], stats_policy) )
673 {
674 if( sinfo[NL80211_STA_INFO_SIGNAL] )
675 {
676 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
677 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
678 }
679
680 if( sinfo[NL80211_STA_INFO_TX_BITRATE] )
681 {
682 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
683 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
684 {
685 if( rinfo[NL80211_RATE_INFO_BITRATE] )
686 {
687 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
688 rr->rate = rr->rate
689 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
690 }
691 }
692 }
693 }
694 }
695
696 return NL_SKIP;
697 }
698
699 int nl80211_get_bitrate(const char *ifname, int *buf)
700 {
701 struct nl80211_rssi_rate rr;
702 struct nl80211_msg_conveyor *req;
703
704 if( !wext_get_bitrate(ifname, buf) )
705 return 0;
706
707 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
708 if( req )
709 {
710 rr.rssi = 0;
711 rr.rate = 0;
712
713 nl80211_cb(req, nl80211_get_signal_cb, &rr);
714 nl80211_send(req);
715 nl80211_free(req);
716
717 if( rr.rate )
718 {
719 *buf = (rr.rate * 100);
720 return 0;
721 }
722 }
723
724 return -1;
725 }
726
727 int nl80211_get_signal(const char *ifname, int *buf)
728 {
729 struct nl80211_rssi_rate rr;
730 struct nl80211_msg_conveyor *req;
731
732 if( !wext_get_signal(ifname, buf) )
733 return 0;
734
735 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
736 if( req )
737 {
738 rr.rssi = 0;
739 rr.rate = 0;
740
741 nl80211_cb(req, nl80211_get_signal_cb, &rr);
742 nl80211_send(req);
743 nl80211_free(req);
744
745 if( rr.rssi )
746 {
747 *buf = rr.rssi;
748 return 0;
749 }
750 }
751
752 return -1;
753 }
754
755 int nl80211_get_noise(const char *ifname, int *buf)
756 {
757 int rv = -1;
758 struct nl80211_msg_conveyor *req, *res;
759 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
760
761 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
762 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
763 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
764 };
765
766 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
767 if( req )
768 {
769 res = nl80211_send(req);
770 if( res )
771 {
772 if( res->attr[NL80211_ATTR_SURVEY_INFO] )
773 {
774 if( !nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
775 res->attr[NL80211_ATTR_SURVEY_INFO], sp) &&
776 si[NL80211_SURVEY_INFO_NOISE] )
777 {
778 *buf = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
779 rv = 0;
780 }
781 }
782 nl80211_free(res);
783 }
784 nl80211_free(req);
785 }
786
787 return rv;
788 }
789
790 int nl80211_get_quality(const char *ifname, int *buf)
791 {
792 int signal;
793
794 if( wext_get_quality(ifname, buf) )
795 {
796 *buf = 0;
797
798 if( !nl80211_get_signal(ifname, &signal) )
799 {
800 /* A positive signal level is usually just a quality
801 * value, pass through as-is */
802 if( signal >= 0 )
803 {
804 *buf = signal;
805 }
806
807 /* The cfg80211 wext compat layer assumes a signal range
808 * of -110 dBm to -40 dBm, the quality value is derived
809 * by adding 110 to the signal level */
810 else
811 {
812 if( signal < -110 )
813 signal = -110;
814 else if( signal > -40 )
815 signal = -40;
816
817 *buf = (signal + 110);
818 }
819 }
820 }
821
822 return 0;
823 }
824
825 int nl80211_get_quality_max(const char *ifname, int *buf)
826 {
827 if( wext_get_quality_max(ifname, buf) )
828 /* The cfg80211 wext compat layer assumes a maximum
829 * quality of 70 */
830 *buf = 70;
831
832 return 0;
833 }
834
835 int nl80211_get_encryption(const char *ifname, char *buf)
836 {
837 int i;
838 char k[9];
839 char *val, *res;
840 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
841
842 /* Hostapd */
843 if( (res = nl80211_hostapd_info(ifname)) )
844 {
845 if( (val = nl80211_getval(ifname, res, "auth_algs")) && (val > 0) )
846 {
847 c->auth_suites |= IWINFO_KMGMT_NONE;
848
849 switch(atoi(val)) {
850 case 1:
851 c->auth_algs |= IWINFO_AUTH_OPEN;
852 break;
853
854 case 2:
855 c->auth_algs |= IWINFO_AUTH_SHARED;
856 break;
857
858 case 3:
859 c->auth_algs |= IWINFO_AUTH_OPEN;
860 c->auth_algs |= IWINFO_AUTH_SHARED;
861 break;
862
863 default:
864 break;
865 }
866
867 for( i = 0; i < 4; i++ )
868 {
869 snprintf(k, sizeof(k), "wep_key%d", i);
870
871 if( (val = nl80211_getval(ifname, res, k)) )
872 {
873 if( (strlen(val) == 5) || (strlen(val) == 10) )
874 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
875
876 else if( (strlen(val) == 13) || (strlen(val) == 26) )
877 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
878 }
879 }
880
881 c->group_ciphers = c->pair_ciphers;
882
883 return 0;
884 }
885
886
887 if( (val = nl80211_getval(ifname, res, "wpa")) != NULL )
888 c->wpa_version = atoi(val);
889
890
891 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
892
893 if( !val || strstr(val, "PSK") )
894 c->auth_suites |= IWINFO_KMGMT_PSK;
895
896 if( val && strstr(val, "EAP") )
897 c->auth_suites |= IWINFO_KMGMT_8021x;
898
899 if( val && strstr(val, "NONE") )
900 c->auth_suites |= IWINFO_KMGMT_NONE;
901
902
903 if( (val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL )
904 {
905 if( strstr(val, "TKIP") )
906 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
907
908 if( strstr(val, "CCMP") )
909 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
910
911 if( strstr(val, "NONE") )
912 c->pair_ciphers |= IWINFO_CIPHER_NONE;
913 }
914
915
916 c->group_ciphers = c->pair_ciphers;
917 c->enabled = (c->auth_algs || c->auth_suites) ? 1 : 0;
918
919 return 0;
920 }
921
922 /* WPA supplicant */
923 else if( (res = nl80211_wpasupp_info(ifname, "STATUS")) &&
924 (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
925 {
926 /* WEP */
927 if( strstr(val, "WEP") )
928 {
929 if( strstr(val, "WEP-40") )
930 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
931
932 else if( strstr(val, "WEP-104") )
933 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
934
935 c->enabled = 1;
936 c->group_ciphers = c->pair_ciphers;
937
938 c->auth_suites |= IWINFO_KMGMT_NONE;
939 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
940 }
941
942 /* WPA */
943 else
944 {
945 if( strstr(val, "TKIP") )
946 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
947
948 else if( strstr(val, "CCMP") )
949 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
950
951 else if( strstr(val, "NONE") )
952 c->pair_ciphers |= IWINFO_CIPHER_NONE;
953
954 else 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
961 if( (val = nl80211_getval(NULL, res, "group_cipher")) )
962 {
963 if( strstr(val, "TKIP") )
964 c->group_ciphers |= IWINFO_CIPHER_TKIP;
965
966 else if( strstr(val, "CCMP") )
967 c->group_ciphers |= IWINFO_CIPHER_CCMP;
968
969 else if( strstr(val, "NONE") )
970 c->group_ciphers |= IWINFO_CIPHER_NONE;
971
972 else if( strstr(val, "WEP-40") )
973 c->group_ciphers |= IWINFO_CIPHER_WEP40;
974
975 else if( strstr(val, "WEP-104") )
976 c->group_ciphers |= IWINFO_CIPHER_WEP104;
977 }
978
979
980 if( (val = nl80211_getval(NULL, res, "key_mgmt")) )
981 {
982 if( strstr(val, "WPA2") )
983 c->wpa_version = 2;
984
985 else if( strstr(val, "WPA") )
986 c->wpa_version = 1;
987
988
989 if( strstr(val, "PSK") )
990 c->auth_suites |= IWINFO_KMGMT_PSK;
991
992 else if( strstr(val, "EAP") || strstr(val, "802.1X") )
993 c->auth_suites |= IWINFO_KMGMT_8021x;
994
995 else if( strstr(val, "NONE") )
996 c->auth_suites |= IWINFO_KMGMT_NONE;
997 }
998
999 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1000 }
1001
1002 return 0;
1003 }
1004
1005 return -1;
1006 }
1007
1008
1009 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1010 {
1011 struct nl80211_assoc_count *ac = arg;
1012 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1013 struct nlattr *attr[NL80211_ATTR_MAX + 1];
1014 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1015
1016 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1017 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1018 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1019 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1020 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1021 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1022 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1023 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1024 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1025 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1026 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1027 };
1028
1029 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1030 genlmsg_attrlen(gnlh, 0), NULL);
1031
1032 if( attr[NL80211_ATTR_MAC] )
1033 memcpy(ac->entry->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1034
1035 if( attr[NL80211_ATTR_STA_INFO] )
1036 {
1037 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1038 attr[NL80211_ATTR_STA_INFO], stats_policy) )
1039 {
1040 if( sinfo[NL80211_STA_INFO_SIGNAL] )
1041 ac->entry->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1042 }
1043 }
1044
1045 ac->entry->noise = ac->noise;
1046 ac->entry++;
1047 ac->count++;
1048
1049 return NL_SKIP;
1050 }
1051
1052 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1053 {
1054 struct nl80211_assoc_count ac;
1055 struct nl80211_msg_conveyor *req;
1056
1057 nl80211_get_noise(ifname, &ac.noise);
1058
1059 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
1060 if( req )
1061 {
1062 ac.count = 0;
1063 ac.entry = (struct iwinfo_assoclist_entry *)buf;
1064
1065 nl80211_cb(req, nl80211_get_assoclist_cb, &ac);
1066 nl80211_send(req);
1067 nl80211_free(req);
1068
1069 *len = (ac.count * sizeof(struct iwinfo_assoclist_entry));
1070 return 0;
1071 }
1072
1073 return -1;
1074 }
1075
1076 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1077 {
1078 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1079 int dbm_max = -1, dbm_cur, dbm_cnt;
1080 struct nl80211_msg_conveyor *req, *res;
1081 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1082 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1083 struct nlattr *band, *freq;
1084 struct iwinfo_txpwrlist_entry entry;
1085
1086 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1087 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1088 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1089 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1090 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1091 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1092 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1093 };
1094
1095 if( nl80211_get_channel(ifname, &ch_cur) )
1096 ch_cur = 0;
1097
1098 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1099 if( req )
1100 {
1101 res = nl80211_send(req);
1102 if( res )
1103 {
1104 nla_for_each_nested(band,
1105 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1106 {
1107 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1108 nla_len(band), NULL);
1109
1110 nla_for_each_nested(freq,
1111 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1112 {
1113 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1114 nla_data(freq), nla_len(freq), freq_policy);
1115
1116 ch_cmp = nl80211_freq2channel(
1117 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1118
1119 if( (!ch_cur || (ch_cmp == ch_cur)) &&
1120 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1121 {
1122 dbm_max = (int)(0.01 * nla_get_u32(
1123 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1124
1125 break;
1126 }
1127 }
1128 }
1129
1130 nl80211_free(res);
1131 }
1132 nl80211_free(req);
1133 }
1134
1135 if( dbm_max > -1 )
1136 {
1137 for( dbm_cur = 0, dbm_cnt = 0;
1138 dbm_cur < dbm_max;
1139 dbm_cur += 2, dbm_cnt++ )
1140 {
1141 entry.dbm = dbm_cur;
1142 entry.mw = iwinfo_dbm2mw(dbm_cur);
1143
1144 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1145 }
1146
1147 entry.dbm = dbm_max;
1148 entry.mw = iwinfo_dbm2mw(dbm_max);
1149
1150 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1151 dbm_cnt++;
1152
1153 *len = dbm_cnt * sizeof(entry);
1154 return 0;
1155 }
1156
1157 return -1;
1158 }
1159
1160 static void nl80211_get_scancrypto(const char *spec,
1161 struct iwinfo_crypto_entry *c)
1162 {
1163 if( strstr(spec, "OPEN") )
1164 {
1165 c->enabled = 0;
1166 }
1167 else
1168 {
1169 c->enabled = 1;
1170
1171 if( strstr(spec, "WPA2-") && strstr(spec, "WPA-") )
1172 c->wpa_version = 3;
1173
1174 else if( strstr(spec, "WPA2") )
1175 c->wpa_version = 2;
1176
1177 else if( strstr(spec, "WPA") )
1178 c->wpa_version = 1;
1179
1180 else if( strstr(spec, "WEP") )
1181 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1182
1183
1184 if( strstr(spec, "PSK") )
1185 c->auth_suites |= IWINFO_KMGMT_PSK;
1186
1187 if( strstr(spec, "802.1X") || strstr(spec, "EAP") )
1188 c->auth_suites |= IWINFO_KMGMT_8021x;
1189
1190 if( strstr(spec, "WPA-NONE") )
1191 c->auth_suites |= IWINFO_KMGMT_NONE;
1192
1193
1194 if( strstr(spec, "TKIP") )
1195 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1196
1197 if( strstr(spec, "CCMP") )
1198 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1199
1200 if( strstr(spec, "WEP-40") )
1201 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1202
1203 if( strstr(spec, "WEP-104") )
1204 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1205
1206 c->group_ciphers = c->pair_ciphers;
1207 }
1208 }
1209
1210 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1211 {
1212 int freq, rssi, qmax, count;
1213 char *res;
1214 char ssid[128] = { 0 };
1215 char bssid[18] = { 0 };
1216 char cipher[256] = { 0 };
1217
1218 /* Got a radioX pseudo interface, find some interface on it or create one */
1219 if( !strncmp(ifname, "radio", 5) )
1220 {
1221 /* Reuse existing interface */
1222 if( (res = nl80211_phy2ifname(ifname)) != NULL )
1223 {
1224 return nl80211_get_scanlist(res, buf, len);
1225 }
1226
1227 /* Need to spawn a temporary iface for scanning */
1228 else if( (res = nl80211_ifadd(ifname)) != NULL )
1229 {
1230 count = nl80211_get_scanlist(res, buf, len);
1231 nl80211_ifdel(res);
1232 return count;
1233 }
1234 }
1235
1236 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1237
1238 /* WPA supplicant */
1239 if( (res = nl80211_wpasupp_info(ifname, "SCAN")) && !strcmp(res, "OK\n") )
1240 {
1241 sleep(2);
1242
1243 if( (res = nl80211_wpasupp_info(ifname, "SCAN_RESULTS")) )
1244 {
1245 nl80211_get_quality_max(ifname, &qmax);
1246
1247 /* skip header line */
1248 while( *res++ != '\n' );
1249
1250 count = 0;
1251
1252 while( sscanf(res, "%17s %d %d %255s %127[^\n]\n",
1253 bssid, &freq, &rssi, cipher, ssid) > 0 )
1254 {
1255 /* BSSID */
1256 e->mac[0] = strtol(&bssid[0], NULL, 16);
1257 e->mac[1] = strtol(&bssid[3], NULL, 16);
1258 e->mac[2] = strtol(&bssid[6], NULL, 16);
1259 e->mac[3] = strtol(&bssid[9], NULL, 16);
1260 e->mac[4] = strtol(&bssid[12], NULL, 16);
1261 e->mac[5] = strtol(&bssid[15], NULL, 16);
1262
1263 /* SSID */
1264 memcpy(e->ssid, ssid,
1265 min(strlen(ssid), sizeof(e->ssid) - 1));
1266
1267 /* Mode (assume master) */
1268 sprintf((char *)e->mode, "Master");
1269
1270 /* Channel */
1271 e->channel = nl80211_freq2channel(freq);
1272
1273 /* Signal */
1274 e->signal = rssi;
1275
1276 /* Quality */
1277 if( rssi < 0 )
1278 {
1279 /* The cfg80211 wext compat layer assumes a signal range
1280 * of -110 dBm to -40 dBm, the quality value is derived
1281 * by adding 110 to the signal level */
1282 if( rssi < -110 )
1283 rssi = -110;
1284 else if( rssi > -40 )
1285 rssi = -40;
1286
1287 e->quality = (rssi + 110);
1288 }
1289 else
1290 {
1291 e->quality = rssi;
1292 }
1293
1294 /* Max. Quality */
1295 e->quality_max = qmax;
1296
1297 /* Crypto */
1298 nl80211_get_scancrypto(cipher, &e->crypto);
1299
1300 /* advance to next line */
1301 while( *res && *res++ != '\n' );
1302
1303 count++;
1304 e++;
1305 }
1306
1307 *len = count * sizeof(struct iwinfo_scanlist_entry);
1308 return 0;
1309 }
1310 }
1311
1312 /* AP scan */
1313 else
1314 {
1315 /* Got a temp interface, don't create yet another one */
1316 if( !strncmp(ifname, "tmp.", 4) )
1317 {
1318 if( !iwinfo_ifup(ifname) )
1319 return -1;
1320
1321 wext_get_scanlist(ifname, buf, len);
1322 iwinfo_ifdown(ifname);
1323 return 0;
1324 }
1325
1326 /* Spawn a new scan interface */
1327 else
1328 {
1329 if( !(res = nl80211_ifadd(ifname)) )
1330 goto out;
1331
1332 if( !iwinfo_ifmac(res) )
1333 goto out;
1334
1335 /* if we can take the new interface up, the driver supports an
1336 * additional interface and there's no need to tear down the ap */
1337 if( iwinfo_ifup(res) )
1338 {
1339 wext_get_scanlist(res, buf, len);
1340 iwinfo_ifdown(res);
1341 }
1342
1343 /* driver cannot create secondary interface, take down ap
1344 * during scan */
1345 else if( iwinfo_ifdown(ifname) && iwinfo_ifup(res) )
1346 {
1347 wext_get_scanlist(res, buf, len);
1348 iwinfo_ifdown(res);
1349 iwinfo_ifup(ifname);
1350 nl80211_hostapd_hup(ifname);
1351 }
1352
1353 out:
1354 nl80211_ifdel(res);
1355 return 0;
1356 }
1357 }
1358
1359 return -1;
1360 }
1361
1362 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1363 {
1364 int count = 0, bands_remain, freqs_remain;
1365 struct nl80211_msg_conveyor *req, *res;
1366 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1367 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1368 struct nlattr *band, *freq;
1369 struct iwinfo_freqlist_entry *e = (struct iwinfo_freqlist_entry *)buf;
1370
1371 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1372 if( req )
1373 {
1374 res = nl80211_send(req);
1375 if( res )
1376 {
1377 nla_for_each_nested(band,
1378 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1379 {
1380 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1381 nla_len(band), NULL);
1382
1383 nla_for_each_nested(freq,
1384 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1385 {
1386 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1387 nla_data(freq), nla_len(freq), NULL);
1388
1389 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1390 freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1391 continue;
1392
1393 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1394 e->channel = nl80211_freq2channel(e->mhz);
1395
1396 e->restricted = (
1397 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1398 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
1399 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1400 ) ? 1 : 0;
1401
1402 e++;
1403 count++;
1404 }
1405 }
1406 nl80211_free(res);
1407 }
1408 nl80211_free(req);
1409 }
1410
1411 if( count > 0 )
1412 {
1413 *len = count * sizeof(struct iwinfo_freqlist_entry);
1414 return 0;
1415 }
1416
1417 return -1;
1418 }
1419
1420 int nl80211_get_country(const char *ifname, char *buf)
1421 {
1422 int rv = -1;
1423 struct nl80211_msg_conveyor *req, *res;
1424
1425 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1426 if( req )
1427 {
1428 res = nl80211_send(req);
1429 if( res )
1430 {
1431 if( res->attr[NL80211_ATTR_REG_ALPHA2] )
1432 {
1433 memcpy(buf, nla_data(res->attr[NL80211_ATTR_REG_ALPHA2]), 2);
1434 rv = 0;
1435 }
1436 nl80211_free(res);
1437 }
1438 nl80211_free(req);
1439 }
1440
1441 return rv;
1442 }
1443
1444 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1445 {
1446 int i, count;
1447 struct iwinfo_iso3166_label *l;
1448 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1449
1450 for( l = ISO3166_Names, count = 0; l->iso3166; l++, e++, count++ )
1451 {
1452 e->iso3166 = l->iso3166;
1453 e->ccode[0] = (l->iso3166 / 256);
1454 e->ccode[1] = (l->iso3166 % 256);
1455 }
1456
1457 *len = (count * sizeof(struct iwinfo_country_entry));
1458 return 0;
1459 }
1460
1461 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1462 {
1463 int bands_remain, freqs_remain;
1464 struct nl80211_msg_conveyor *req, *res;
1465 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1466 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1467 struct nlattr *band, *freq;
1468 uint16_t caps = 0;
1469
1470 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1471 if( req )
1472 {
1473 res = nl80211_send(req);
1474 if( res )
1475 {
1476 nla_for_each_nested(band,
1477 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1478 {
1479 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1480 nla_len(band), NULL);
1481
1482 if( bands[NL80211_BAND_ATTR_HT_CAPA] )
1483 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1484
1485 /* Treat any nonzero capability as 11n */
1486 if( caps > 0 )
1487 *buf |= IWINFO_80211_N;
1488
1489 nla_for_each_nested(freq,
1490 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1491 {
1492 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1493 nla_data(freq), nla_len(freq), NULL);
1494
1495 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] )
1496 continue;
1497
1498 if( nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485 )
1499 {
1500 *buf |= IWINFO_80211_B;
1501 *buf |= IWINFO_80211_G;
1502 }
1503 else
1504 {
1505 *buf |= IWINFO_80211_A;
1506 }
1507 }
1508 }
1509 nl80211_free(res);
1510 }
1511 nl80211_free(req);
1512 }
1513
1514 return *buf ? 0 : -1;
1515 }
1516
1517 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1518 {
1519 /* Test whether we can create another interface */
1520 char *nif = nl80211_ifadd(ifname);
1521
1522 if( nif )
1523 {
1524 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
1525
1526 iwinfo_ifdown(nif);
1527 nl80211_ifdel(nif);
1528
1529 return 0;
1530 }
1531
1532 return -1;
1533 }
Lua Configuration Interface (mirror)