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[backfire] iwinfo: merge memory leak fix from r29723
[openwrt/svn-archive/archive.git] / 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 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 nls->nl_sock = nl_socket_alloc();
45 if (!nls->nl_sock) {
46 err = -ENOMEM;
47 goto err;
48 }
49
50 if( genl_connect(nls->nl_sock)) {
51 err = -ENOLINK;
52 goto err;
53 }
54
55 fd = nl_socket_get_fd(nls->nl_sock);
56 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0)
57 {
58 err = -EINVAL;
59 goto err;
60 }
61
62 if( genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
63 err = -ENOMEM;
64 goto err;
65 }
66
67 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
68 if (!nls->nl80211)
69 {
70 err = -ENOENT;
71 goto err;
72 }
73 }
74
75 return 0;
76
77
78 err:
79 nl80211_close();
80 return err;
81 }
82
83 static int nl80211_msg_error(struct sockaddr_nl *nla,
84 struct nlmsgerr *err, void *arg)
85 {
86 int *ret = arg;
87 *ret = err->error;
88 return NL_STOP;
89 }
90
91 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
92 {
93 int *ret = arg;
94 *ret = 0;
95 return NL_SKIP;
96 }
97
98 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
99 {
100 int *ret = arg;
101 *ret = 0;
102 return NL_STOP;
103 }
104
105 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
106 {
107 return NL_SKIP;
108 }
109
110 static void nl80211_free(struct nl80211_msg_conveyor *cv)
111 {
112 if (cv)
113 {
114 if (cv->cb)
115 nl_cb_put(cv->cb);
116
117 if (cv->msg)
118 nlmsg_free(cv->msg);
119
120 cv->cb = NULL;
121 cv->msg = NULL;
122 }
123 }
124
125 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname, int cmd, int flags)
126 {
127 static struct nl80211_msg_conveyor cv;
128
129 int ifidx = -1, phyidx = -1;
130 struct nl_msg *req = NULL;
131 struct nl_cb *cb = NULL;
132
133 if (nl80211_init() < 0)
134 goto err;
135
136 if (!strncmp(ifname, "phy", 3))
137 phyidx = atoi(&ifname[3]);
138 else if (!strncmp(ifname, "radio", 5))
139 phyidx = atoi(&ifname[5]);
140 else if (!strncmp(ifname, "mon.", 4))
141 ifidx = if_nametoindex(&ifname[4]);
142 else
143 ifidx = if_nametoindex(ifname);
144
145 if ((ifidx < 0) && (phyidx < 0))
146 return NULL;
147
148 req = nlmsg_alloc();
149 if (!req)
150 goto err;
151
152 cb = nl_cb_alloc(NL_CB_DEFAULT);
153 if (!cb)
154 goto err;
155
156 genlmsg_put(req, 0, 0, genl_family_get_id(nls->nl80211), 0,
157 flags, cmd, 0);
158
159 if (ifidx > -1)
160 NLA_PUT_U32(req, NL80211_ATTR_IFINDEX, ifidx);
161
162 if (phyidx > -1)
163 NLA_PUT_U32(req, NL80211_ATTR_WIPHY, phyidx);
164
165 cv.msg = req;
166 cv.cb = cb;
167
168 return &cv;
169
170 err:
171 nla_put_failure:
172 if (cb)
173 nl_cb_put(cb);
174
175 if (req)
176 nlmsg_free(req);
177
178 return NULL;
179 }
180
181 static struct nl80211_msg_conveyor * nl80211_send(
182 struct nl80211_msg_conveyor *cv,
183 int (*cb_func)(struct nl_msg *, void *), void *cb_arg
184 ) {
185 static struct nl80211_msg_conveyor rcv;
186 int err = 1;
187
188 if (cb_func)
189 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
190 else
191 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
192
193 if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
194 goto err;
195
196 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
197 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
198 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
199
200 while (err > 0)
201 nl_recvmsgs(nls->nl_sock, cv->cb);
202
203 return &rcv;
204
205 err:
206 nl_cb_put(cv->cb);
207 nlmsg_free(cv->msg);
208
209 return NULL;
210 }
211
212 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
213 {
214 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
215 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
216
217 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
218 genlmsg_attrlen(gnlh, 0), NULL);
219
220 return attr;
221 }
222
223 static int nl80211_freq2channel(int freq)
224 {
225 if (freq == 2484)
226 return 14;
227
228 if (freq < 2484)
229 return (freq - 2407) / 5;
230
231 return (freq / 5) - 1000;
232 }
233
234 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
235 {
236 int i, len;
237 char lkey[64] = { 0 };
238 const char *ln = buf;
239 static char lval[256] = { 0 };
240
241 int matched_if = ifname ? 0 : 1;
242
243
244 for( i = 0, len = strlen(buf); i < len; i++ )
245 {
246 if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
247 {
248 ln++;
249 }
250 else if (!lkey[0] && (buf[i] == '='))
251 {
252 if ((&buf[i] - ln) > 0)
253 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
254 }
255 else if (buf[i] == '\n')
256 {
257 if (lkey[0])
258 {
259 memcpy(lval, ln + strlen(lkey) + 1,
260 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
261
262 if ((ifname != NULL) &&
263 (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
264 {
265 matched_if = !strcmp(lval, ifname);
266 }
267 else if (matched_if && !strcmp(lkey, key))
268 {
269 return lval;
270 }
271 }
272
273 ln = &buf[i+1];
274 memset(lkey, 0, sizeof(lkey));
275 memset(lval, 0, sizeof(lval));
276 }
277 }
278
279 return NULL;
280 }
281
282 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
283 {
284 char *buf = arg;
285 struct nlattr **attr = nl80211_parse(msg);
286
287 if (attr[NL80211_ATTR_WIPHY_NAME])
288 sprintf(buf, "%s", nla_data(attr[NL80211_ATTR_WIPHY_NAME]));
289 else
290 buf[0] = 0;
291
292 return NL_SKIP;
293 }
294
295 static char * nl80211_ifname2phy(const char *ifname)
296 {
297 static char phy[32] = { 0 };
298 struct nl80211_msg_conveyor *req;
299
300 memset(phy, 0, sizeof(phy));
301
302 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
303 if (req)
304 {
305 nl80211_send(req, nl80211_ifname2phy_cb, phy);
306 nl80211_free(req);
307 }
308
309 return phy[0] ? phy : NULL;
310 }
311
312 static char * nl80211_hostapd_info(const char *ifname)
313 {
314 char *phy;
315 char path[32] = { 0 };
316 static char buf[4096] = { 0 };
317 FILE *conf;
318
319 if ((phy = nl80211_ifname2phy(ifname)) != NULL)
320 {
321 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
322
323 if ((conf = fopen(path, "r")) != NULL)
324 {
325 fread(buf, sizeof(buf) - 1, 1, conf);
326 fclose(conf);
327
328 return buf;
329 }
330 }
331
332 return NULL;
333 }
334
335 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
336 {
337 fd_set rfds;
338 struct timeval tv = { 2, 0 };
339
340 FD_ZERO(&rfds);
341 FD_SET(sock, &rfds);
342
343 memset(buf, 0, blen);
344
345
346 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
347 return -1;
348
349 if (!FD_ISSET(sock, &rfds))
350 return -1;
351
352 return recv(sock, buf, blen, 0);
353 }
354
355 static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
356 const char *event)
357 {
358 int numtry = 0;
359 int sock = -1;
360 char *rv = NULL;
361 size_t remote_length, local_length;
362 static char buffer[10240] = { 0 };
363
364 struct sockaddr_un local = { 0 };
365 struct sockaddr_un remote = { 0 };
366
367
368 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
369 if (sock < 0)
370 return NULL;
371
372 remote.sun_family = AF_UNIX;
373 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
374 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
375
376 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
377 goto out;
378
379 if (connect(sock, (struct sockaddr *) &remote, remote_length))
380 goto out;
381
382 local.sun_family = AF_UNIX;
383 local_length = sizeof(local.sun_family) + sprintf(local.sun_path,
384 "/var/run/iwinfo-%s-%d", ifname, getpid());
385
386 if (bind(sock, (struct sockaddr *) &local, local_length))
387 goto out;
388
389
390 send(sock, "ATTACH", 6, 0);
391
392 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
393 goto out;
394
395
396 send(sock, cmd, strlen(cmd), 0);
397
398 while( numtry++ < 5 )
399 {
400 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
401 {
402 if (event)
403 continue;
404
405 break;
406 }
407
408 if ((!event && buffer[0] != '<') || strstr(buffer, event))
409 break;
410 }
411
412 rv = buffer;
413
414 out:
415 close(sock);
416
417 if (local.sun_family)
418 unlink(local.sun_path);
419
420 return rv;
421 }
422
423 static inline int nl80211_readint(const char *path)
424 {
425 int fd;
426 int rv = -1;
427 char buffer[16];
428
429 if ((fd = open(path, O_RDONLY)) > -1)
430 {
431 if (read(fd, buffer, sizeof(buffer)) > 0)
432 rv = atoi(buffer);
433
434 close(fd);
435 }
436
437 return rv;
438 }
439
440 static char * nl80211_phy2ifname(const char *ifname)
441 {
442 int fd, ifidx = -1, cifidx = -1, phyidx = -1;
443 char buffer[64];
444 static char nif[IFNAMSIZ] = { 0 };
445
446 DIR *d;
447 struct dirent *e;
448
449 if (!ifname)
450 return NULL;
451 else if (!strncmp(ifname, "phy", 3))
452 phyidx = atoi(&ifname[3]);
453 else if (!strncmp(ifname, "radio", 5))
454 phyidx = atoi(&ifname[5]);
455
456 memset(nif, 0, sizeof(nif));
457
458 if (phyidx > -1)
459 {
460 if ((d = opendir("/sys/class/net")) != NULL)
461 {
462 while( (e = readdir(d)) != NULL )
463 {
464 snprintf(buffer, sizeof(buffer),
465 "/sys/class/net/%s/phy80211/index", e->d_name);
466
467 if (nl80211_readint(buffer) == phyidx)
468 {
469 snprintf(buffer, sizeof(buffer),
470 "/sys/class/net/%s/ifindex", e->d_name);
471
472 if( (cifidx = nl80211_readint(buffer)) >= 0 &&
473 ((ifidx < 0) || (cifidx < ifidx)) )
474 {
475 ifidx = cifidx;
476 strncpy(nif, e->d_name, sizeof(nif));
477 }
478 }
479 }
480
481 closedir(d);
482 }
483 }
484
485 return nif[0] ? nif : NULL;
486 }
487
488 static char * nl80211_ifadd(const char *ifname)
489 {
490 int phyidx;
491 char *rv = NULL;
492 static char nif[IFNAMSIZ] = { 0 };
493 struct nl80211_msg_conveyor *req, *res;
494
495 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
496 if (req)
497 {
498 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
499
500 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
501 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
502
503 nl80211_send(req, NULL, NULL);
504
505 rv = nif;
506
507 nla_put_failure:
508 nl80211_free(req);
509 }
510
511 return rv;
512 }
513
514 static void nl80211_ifdel(const char *ifname)
515 {
516 struct nl80211_msg_conveyor *req;
517
518 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
519 if (req)
520 {
521 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
522
523 nl80211_send(req, NULL, NULL);
524
525 nla_put_failure:
526 nl80211_free(req);
527 }
528 }
529
530 static void nl80211_hostapd_hup(const char *ifname)
531 {
532 int fd, pid = 0;
533 char buf[32];
534 char *phy = nl80211_ifname2phy(ifname);
535
536 if (phy)
537 {
538 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
539 if ((fd = open(buf, O_RDONLY)) > 0)
540 {
541 if (read(fd, buf, sizeof(buf)) > 0)
542 pid = atoi(buf);
543
544 close(fd);
545 }
546
547 if (pid > 0)
548 kill(pid, 1);
549 }
550 }
551
552
553 int nl80211_probe(const char *ifname)
554 {
555 return !!nl80211_ifname2phy(ifname);
556 }
557
558 void nl80211_close(void)
559 {
560 if (nls)
561 {
562 if (nls->nl80211)
563 genl_family_put(nls->nl80211);
564
565 if (nls->nl_sock)
566 nl_socket_free(nls->nl_sock);
567
568 if (nls->nl_cache)
569 nl_cache_free(nls->nl_cache);
570
571 free(nls);
572 nls = NULL;
573 }
574 }
575
576 int nl80211_get_mode(const char *ifname, char *buf)
577 {
578 return wext_get_mode(ifname, buf);
579 }
580
581 int nl80211_get_ssid(const char *ifname, char *buf)
582 {
583 char *ssid;
584
585 if (!wext_get_ssid(ifname, buf))
586 {
587 return 0;
588 }
589 else if( (ssid = nl80211_hostapd_info(ifname)) &&
590 (ssid = nl80211_getval(ifname, ssid, "ssid")) )
591 {
592 memcpy(buf, ssid, strlen(ssid));
593 return 0;
594 }
595
596 return -1;
597 }
598
599 int nl80211_get_bssid(const char *ifname, char *buf)
600 {
601 char *bssid;
602 unsigned char mac[6];
603
604 if (!wext_get_bssid(ifname, buf))
605 {
606 return 0;
607 }
608 else if((bssid = nl80211_hostapd_info(ifname)) &&
609 (bssid = nl80211_getval(ifname, bssid, "bssid")))
610 {
611 mac[0] = strtol(&bssid[0], NULL, 16);
612 mac[1] = strtol(&bssid[3], NULL, 16);
613 mac[2] = strtol(&bssid[6], NULL, 16);
614 mac[3] = strtol(&bssid[9], NULL, 16);
615 mac[4] = strtol(&bssid[12], NULL, 16);
616 mac[5] = strtol(&bssid[15], NULL, 16);
617
618 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
619 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
620
621 return 0;
622 }
623
624 return -1;
625 }
626
627 int nl80211_get_channel(const char *ifname, int *buf)
628 {
629 char *first;
630
631 if (!wext_get_channel(ifname, buf))
632 return 0;
633
634 else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
635 return wext_get_channel(first, buf);
636
637 return -1;
638 }
639
640 int nl80211_get_frequency(const char *ifname, int *buf)
641 {
642 char *first;
643
644 if (!wext_get_frequency(ifname, buf))
645 return 0;
646
647 else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
648 return wext_get_frequency(first, buf);
649
650 return -1;
651 }
652
653 int nl80211_get_txpower(const char *ifname, int *buf)
654 {
655 return wext_get_txpower(ifname, buf);
656 }
657
658
659 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
660 {
661 int8_t dbm;
662 int16_t mbit;
663 struct nl80211_rssi_rate *rr = arg;
664 struct nlattr **attr = nl80211_parse(msg);
665 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
666 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
667
668 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
669 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
670 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
671 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
672 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
673 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
674 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
675 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
676 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
677 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
678 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
679 };
680
681 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
682 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
683 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
684 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
685 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
686 };
687
688 if (attr[NL80211_ATTR_STA_INFO])
689 {
690 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
691 attr[NL80211_ATTR_STA_INFO], stats_policy) )
692 {
693 if (sinfo[NL80211_STA_INFO_SIGNAL])
694 {
695 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
696 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
697 }
698
699 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
700 {
701 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
702 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
703 {
704 if (rinfo[NL80211_RATE_INFO_BITRATE])
705 {
706 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
707 rr->rate = rr->rate
708 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
709 }
710 }
711 }
712 }
713 }
714
715 return NL_SKIP;
716 }
717
718 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
719 {
720 DIR *d;
721 struct dirent *de;
722 struct nl80211_msg_conveyor *req;
723
724 r->rssi = 0;
725 r->rate = 0;
726
727 if ((d = opendir("/sys/class/net")) != NULL)
728 {
729 while ((de = readdir(d)) != NULL)
730 {
731 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
732 (!de->d_name[strlen(ifname)] ||
733 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
734 {
735 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
736 NLM_F_DUMP);
737
738 if (req)
739 {
740 nl80211_send(req, nl80211_fill_signal_cb, r);
741 nl80211_free(req);
742 }
743 }
744 }
745
746 closedir(d);
747 }
748 }
749
750 int nl80211_get_bitrate(const char *ifname, int *buf)
751 {
752 struct nl80211_rssi_rate rr;
753
754 if (!wext_get_bitrate(ifname, buf))
755 return 0;
756
757 nl80211_fill_signal(ifname, &rr);
758
759 if (rr.rate)
760 {
761 *buf = (rr.rate * 100);
762 return 0;
763 }
764
765 return -1;
766 }
767
768 int nl80211_get_signal(const char *ifname, int *buf)
769 {
770 struct nl80211_rssi_rate rr;
771
772 if (!wext_get_signal(ifname, buf))
773 return 0;
774
775 nl80211_fill_signal(ifname, &rr);
776
777 if (rr.rssi)
778 {
779 *buf = rr.rssi;
780 return 0;
781 }
782
783 return -1;
784 }
785
786 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
787 {
788 int8_t *noise = arg;
789 struct nlattr **tb = nl80211_parse(msg);
790 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
791
792 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
793 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
794 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
795 };
796
797 if (!tb[NL80211_ATTR_SURVEY_INFO])
798 return NL_SKIP;
799
800 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
801 tb[NL80211_ATTR_SURVEY_INFO], sp))
802 return NL_SKIP;
803
804 if (!si[NL80211_SURVEY_INFO_NOISE])
805 return NL_SKIP;
806
807 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
808 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
809
810 return NL_SKIP;
811 }
812
813
814 int nl80211_get_noise(const char *ifname, int *buf)
815 {
816 int8_t noise;
817 struct nl80211_msg_conveyor *req;
818
819 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
820 if (req)
821 {
822 noise = 0;
823
824 nl80211_send(req, nl80211_get_noise_cb, &noise);
825 nl80211_free(req);
826
827 if (noise)
828 {
829 *buf = noise;
830 return 0;
831 }
832 }
833
834 return -1;
835 }
836
837 int nl80211_get_quality(const char *ifname, int *buf)
838 {
839 int signal;
840
841 if (wext_get_quality(ifname, buf))
842 {
843 *buf = 0;
844
845 if (!nl80211_get_signal(ifname, &signal))
846 {
847 /* A positive signal level is usually just a quality
848 * value, pass through as-is */
849 if (signal >= 0)
850 {
851 *buf = signal;
852 }
853
854 /* The cfg80211 wext compat layer assumes a signal range
855 * of -110 dBm to -40 dBm, the quality value is derived
856 * by adding 110 to the signal level */
857 else
858 {
859 if (signal < -110)
860 signal = -110;
861 else if (signal > -40)
862 signal = -40;
863
864 *buf = (signal + 110);
865 }
866 }
867 }
868
869 return 0;
870 }
871
872 int nl80211_get_quality_max(const char *ifname, int *buf)
873 {
874 if (wext_get_quality_max(ifname, buf))
875 /* The cfg80211 wext compat layer assumes a maximum
876 * quality of 70 */
877 *buf = 70;
878
879 return 0;
880 }
881
882 int nl80211_get_encryption(const char *ifname, char *buf)
883 {
884 int i;
885 char k[9];
886 char *val, *res;
887 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
888
889 /* WPA supplicant */
890 if( (res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
891 (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
892 {
893 /* WEP */
894 if (strstr(val, "WEP"))
895 {
896 if (strstr(val, "WEP-40"))
897 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
898
899 else if (strstr(val, "WEP-104"))
900 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
901
902 c->enabled = 1;
903 c->group_ciphers = c->pair_ciphers;
904
905 c->auth_suites |= IWINFO_KMGMT_NONE;
906 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
907 }
908
909 /* WPA */
910 else
911 {
912 if (strstr(val, "TKIP"))
913 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
914
915 else if (strstr(val, "CCMP"))
916 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
917
918 else if (strstr(val, "NONE"))
919 c->pair_ciphers |= IWINFO_CIPHER_NONE;
920
921 else if (strstr(val, "WEP-40"))
922 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
923
924 else if (strstr(val, "WEP-104"))
925 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
926
927
928 if ((val = nl80211_getval(NULL, res, "group_cipher")))
929 {
930 if (strstr(val, "TKIP"))
931 c->group_ciphers |= IWINFO_CIPHER_TKIP;
932
933 else if (strstr(val, "CCMP"))
934 c->group_ciphers |= IWINFO_CIPHER_CCMP;
935
936 else if (strstr(val, "NONE"))
937 c->group_ciphers |= IWINFO_CIPHER_NONE;
938
939 else if (strstr(val, "WEP-40"))
940 c->group_ciphers |= IWINFO_CIPHER_WEP40;
941
942 else if (strstr(val, "WEP-104"))
943 c->group_ciphers |= IWINFO_CIPHER_WEP104;
944 }
945
946
947 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
948 {
949 if (strstr(val, "WPA2"))
950 c->wpa_version = 2;
951
952 else if (strstr(val, "WPA"))
953 c->wpa_version = 1;
954
955
956 if (strstr(val, "PSK"))
957 c->auth_suites |= IWINFO_KMGMT_PSK;
958
959 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
960 c->auth_suites |= IWINFO_KMGMT_8021x;
961
962 else if (strstr(val, "NONE"))
963 c->auth_suites |= IWINFO_KMGMT_NONE;
964 }
965
966 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
967 }
968
969 return 0;
970 }
971
972 /* Hostapd */
973 else if ((res = nl80211_hostapd_info(ifname)))
974 {
975 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
976 c->wpa_version = atoi(val);
977
978 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
979
980 if (!val || strstr(val, "PSK"))
981 c->auth_suites |= IWINFO_KMGMT_PSK;
982
983 if (val && strstr(val, "EAP"))
984 c->auth_suites |= IWINFO_KMGMT_8021x;
985
986 if (val && strstr(val, "NONE"))
987 c->auth_suites |= IWINFO_KMGMT_NONE;
988
989 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
990 {
991 if (strstr(val, "TKIP"))
992 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
993
994 if (strstr(val, "CCMP"))
995 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
996
997 if (strstr(val, "NONE"))
998 c->pair_ciphers |= IWINFO_CIPHER_NONE;
999 }
1000
1001 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1002 {
1003 switch(atoi(val)) {
1004 case 1:
1005 c->auth_algs |= IWINFO_AUTH_OPEN;
1006 break;
1007
1008 case 2:
1009 c->auth_algs |= IWINFO_AUTH_SHARED;
1010 break;
1011
1012 case 3:
1013 c->auth_algs |= IWINFO_AUTH_OPEN;
1014 c->auth_algs |= IWINFO_AUTH_SHARED;
1015 break;
1016
1017 default:
1018 break;
1019 }
1020
1021 for( i = 0; i < 4; i++ )
1022 {
1023 snprintf(k, sizeof(k), "wep_key%d", i);
1024
1025 if ((val = nl80211_getval(ifname, res, k)))
1026 {
1027 if ((strlen(val) == 5) || (strlen(val) == 10))
1028 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1029
1030 else if ((strlen(val) == 13) || (strlen(val) == 26))
1031 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1032 }
1033 }
1034 }
1035
1036 c->group_ciphers = c->pair_ciphers;
1037 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1038
1039 return 0;
1040 }
1041
1042 return -1;
1043 }
1044
1045
1046 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1047 {
1048 struct nl80211_array_buf *arr = arg;
1049 struct iwinfo_assoclist_entry *e = arr->buf;
1050 struct nlattr **attr = nl80211_parse(msg);
1051 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1052
1053 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1054 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1055 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1056 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1057 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1058 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1059 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1060 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1061 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1062 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1063 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1064 };
1065
1066 /* advance to end of array */
1067 e += arr->count;
1068
1069 if (attr[NL80211_ATTR_MAC])
1070 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1071
1072 if (attr[NL80211_ATTR_STA_INFO])
1073 {
1074 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1075 attr[NL80211_ATTR_STA_INFO], stats_policy))
1076 {
1077 if (sinfo[NL80211_STA_INFO_SIGNAL])
1078 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1079 }
1080 }
1081
1082 e->noise = 0; /* filled in by caller */
1083 arr->count++;
1084
1085 return NL_SKIP;
1086 }
1087
1088 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1089 {
1090 DIR *d;
1091 int i, noise = 0;
1092 struct dirent *de;
1093 struct nl80211_msg_conveyor *req;
1094 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1095 struct iwinfo_assoclist_entry *e;
1096
1097 if ((d = opendir("/sys/class/net")) != NULL)
1098 {
1099 while ((de = readdir(d)) != NULL)
1100 {
1101 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1102 (!de->d_name[strlen(ifname)] ||
1103 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1104 {
1105 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1106 NLM_F_DUMP);
1107
1108 if (req)
1109 {
1110 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1111 nl80211_free(req);
1112 }
1113
1114 break;
1115 }
1116 }
1117
1118 closedir(d);
1119
1120 if (!nl80211_get_noise(ifname, &noise))
1121 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1122 e->noise = noise;
1123
1124 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1125 return 0;
1126 }
1127
1128 return -1;
1129 }
1130
1131 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1132 {
1133 int *dbm_max = arg;
1134 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1135
1136 struct nlattr **attr = nl80211_parse(msg);
1137 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1138 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1139 struct nlattr *band, *freq;
1140
1141 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1142 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1143 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1144 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1145 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1146 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1147 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1148 };
1149
1150 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1151 *dbm_max = -1;
1152
1153 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1154 {
1155 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1156 nla_len(band), NULL);
1157
1158 nla_for_each_nested(freq,
1159 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1160 {
1161 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1162 nla_data(freq), nla_len(freq), freq_policy);
1163
1164 ch_cmp = nl80211_freq2channel(
1165 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1166
1167 if( (!ch_cur || (ch_cmp == ch_cur)) &&
1168 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1169 {
1170 *dbm_max = (int)(0.01 * nla_get_u32(
1171 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1172
1173 break;
1174 }
1175 }
1176 }
1177
1178 return NL_SKIP;
1179 }
1180
1181 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1182 {
1183 int ch_cur;
1184 int dbm_max = -1, dbm_cur, dbm_cnt;
1185 struct nl80211_msg_conveyor *req;
1186 struct iwinfo_txpwrlist_entry entry;
1187
1188 if (nl80211_get_channel(ifname, &ch_cur))
1189 ch_cur = 0;
1190
1191 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1192 if (req)
1193 {
1194 /* initialize the value pointer with channel for callback */
1195 dbm_max = ch_cur;
1196
1197 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1198 nl80211_free(req);
1199 }
1200
1201 if (dbm_max > -1)
1202 {
1203 for (dbm_cur = 0, dbm_cnt = 0;
1204 dbm_cur < dbm_max;
1205 dbm_cur++, dbm_cnt++)
1206 {
1207 entry.dbm = dbm_cur;
1208 entry.mw = iwinfo_dbm2mw(dbm_cur);
1209
1210 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1211 }
1212
1213 entry.dbm = dbm_max;
1214 entry.mw = iwinfo_dbm2mw(dbm_max);
1215
1216 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1217 dbm_cnt++;
1218
1219 *len = dbm_cnt * sizeof(entry);
1220 return 0;
1221 }
1222
1223 return -1;
1224 }
1225
1226 static void nl80211_get_scancrypto(const char *spec,
1227 struct iwinfo_crypto_entry *c)
1228 {
1229 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1230 {
1231 c->enabled = 1;
1232
1233 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1234 c->wpa_version = 3;
1235
1236 else if (strstr(spec, "WPA2"))
1237 c->wpa_version = 2;
1238
1239 else if (strstr(spec, "WPA"))
1240 c->wpa_version = 1;
1241
1242 else if (strstr(spec, "WEP"))
1243 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1244
1245
1246 if (strstr(spec, "PSK"))
1247 c->auth_suites |= IWINFO_KMGMT_PSK;
1248
1249 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1250 c->auth_suites |= IWINFO_KMGMT_8021x;
1251
1252 if (strstr(spec, "WPA-NONE"))
1253 c->auth_suites |= IWINFO_KMGMT_NONE;
1254
1255
1256 if (strstr(spec, "TKIP"))
1257 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1258
1259 if (strstr(spec, "CCMP"))
1260 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1261
1262 if (strstr(spec, "WEP-40"))
1263 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1264
1265 if (strstr(spec, "WEP-104"))
1266 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1267
1268 c->group_ciphers = c->pair_ciphers;
1269 }
1270 else
1271 {
1272 c->enabled = 0;
1273 }
1274 }
1275
1276 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1277 {
1278 int freq, rssi, qmax, count;
1279 char *res;
1280 char ssid[128] = { 0 };
1281 char bssid[18] = { 0 };
1282 char cipher[256] = { 0 };
1283
1284 /* Got a radioX pseudo interface, find some interface on it or create one */
1285 if (!strncmp(ifname, "radio", 5))
1286 {
1287 /* Reuse existing interface */
1288 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1289 {
1290 return nl80211_get_scanlist(res, buf, len);
1291 }
1292
1293 /* Need to spawn a temporary iface for scanning */
1294 else if ((res = nl80211_ifadd(ifname)) != NULL)
1295 {
1296 count = nl80211_get_scanlist(res, buf, len);
1297 nl80211_ifdel(res);
1298 return count;
1299 }
1300 }
1301
1302 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1303
1304 /* WPA supplicant */
1305 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1306 {
1307 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1308 {
1309 nl80211_get_quality_max(ifname, &qmax);
1310
1311 /* skip header line */
1312 while( *res++ != '\n' );
1313
1314 count = 0;
1315
1316 while( sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1317 bssid, &freq, &rssi, cipher, ssid) > 0 )
1318 {
1319 /* BSSID */
1320 e->mac[0] = strtol(&bssid[0], NULL, 16);
1321 e->mac[1] = strtol(&bssid[3], NULL, 16);
1322 e->mac[2] = strtol(&bssid[6], NULL, 16);
1323 e->mac[3] = strtol(&bssid[9], NULL, 16);
1324 e->mac[4] = strtol(&bssid[12], NULL, 16);
1325 e->mac[5] = strtol(&bssid[15], NULL, 16);
1326
1327 /* SSID */
1328 memcpy(e->ssid, ssid,
1329 min(strlen(ssid), sizeof(e->ssid) - 1));
1330
1331 /* Mode (assume master) */
1332 sprintf((char *)e->mode, "Master");
1333
1334 /* Channel */
1335 e->channel = nl80211_freq2channel(freq);
1336
1337 /* Signal */
1338 e->signal = rssi;
1339
1340 /* Quality */
1341 if (rssi < 0)
1342 {
1343 /* The cfg80211 wext compat layer assumes a signal range
1344 * of -110 dBm to -40 dBm, the quality value is derived
1345 * by adding 110 to the signal level */
1346 if (rssi < -110)
1347 rssi = -110;
1348 else if (rssi > -40)
1349 rssi = -40;
1350
1351 e->quality = (rssi + 110);
1352 }
1353 else
1354 {
1355 e->quality = rssi;
1356 }
1357
1358 /* Max. Quality */
1359 e->quality_max = qmax;
1360
1361 /* Crypto */
1362 nl80211_get_scancrypto(cipher, &e->crypto);
1363
1364 /* advance to next line */
1365 while( *res && *res++ != '\n' );
1366
1367 count++;
1368 e++;
1369
1370 memset(ssid, 0, sizeof(ssid));
1371 memset(bssid, 0, sizeof(bssid));
1372 memset(cipher, 0, sizeof(cipher));
1373 }
1374
1375 *len = count * sizeof(struct iwinfo_scanlist_entry);
1376 return 0;
1377 }
1378 }
1379
1380 /* AP scan */
1381 else
1382 {
1383 /* Got a temp interface, don't create yet another one */
1384 if (!strncmp(ifname, "tmp.", 4))
1385 {
1386 if (!iwinfo_ifup(ifname))
1387 return -1;
1388
1389 wext_get_scanlist(ifname, buf, len);
1390 iwinfo_ifdown(ifname);
1391 return 0;
1392 }
1393
1394 /* Spawn a new scan interface */
1395 else
1396 {
1397 if (!(res = nl80211_ifadd(ifname)))
1398 goto out;
1399
1400 if (!iwinfo_ifmac(res))
1401 goto out;
1402
1403 /* if we can take the new interface up, the driver supports an
1404 * additional interface and there's no need to tear down the ap */
1405 if (iwinfo_ifup(res))
1406 {
1407 wext_get_scanlist(res, buf, len);
1408 iwinfo_ifdown(res);
1409 }
1410
1411 /* driver cannot create secondary interface, take down ap
1412 * during scan */
1413 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1414 {
1415 wext_get_scanlist(res, buf, len);
1416 iwinfo_ifdown(res);
1417 iwinfo_ifup(ifname);
1418 nl80211_hostapd_hup(ifname);
1419 }
1420
1421 out:
1422 nl80211_ifdel(res);
1423 return 0;
1424 }
1425 }
1426
1427 return -1;
1428 }
1429
1430 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
1431 {
1432 int bands_remain, freqs_remain;
1433
1434 struct nl80211_array_buf *arr = arg;
1435 struct iwinfo_freqlist_entry *e = arr->buf;
1436
1437 struct nlattr **attr = nl80211_parse(msg);
1438 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1439 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1440 struct nlattr *band, *freq;
1441
1442 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1443 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1444 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1445 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1446 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1447 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1448 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1449 };
1450
1451 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1452 {
1453 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1454 nla_len(band), NULL);
1455
1456 nla_for_each_nested(freq,
1457 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1458 {
1459 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1460 nla_data(freq), nla_len(freq), NULL);
1461
1462 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1463 freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1464 continue;
1465
1466 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1467 e->channel = nl80211_freq2channel(e->mhz);
1468
1469 e->restricted = (
1470 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1471 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
1472 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1473 ) ? 1 : 0;
1474
1475 e++;
1476 arr->count++;
1477 }
1478 }
1479
1480 return NL_SKIP;
1481 }
1482
1483 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1484 {
1485 struct nl80211_msg_conveyor *req;
1486 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1487
1488 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1489 if (req)
1490 {
1491 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
1492 nl80211_free(req);
1493 }
1494
1495 if (arr.count > 0)
1496 {
1497 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
1498 return 0;
1499 }
1500
1501 return -1;
1502 }
1503
1504 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
1505 {
1506 char *buf = arg;
1507 struct nlattr **attr = nl80211_parse(msg);
1508
1509 if (attr[NL80211_ATTR_REG_ALPHA2])
1510 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
1511 else
1512 buf[0] = 0;
1513
1514 return NL_SKIP;
1515 }
1516
1517 int nl80211_get_country(const char *ifname, char *buf)
1518 {
1519 int rv = -1;
1520 struct nl80211_msg_conveyor *req;
1521
1522 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1523 if (req)
1524 {
1525 nl80211_send(req, nl80211_get_country_cb, buf);
1526 nl80211_free(req);
1527
1528 if (buf[0])
1529 rv = 0;
1530 }
1531
1532 return rv;
1533 }
1534
1535 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1536 {
1537 int i, count;
1538 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1539 const struct iwinfo_iso3166_label *l;
1540
1541 for( l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++ )
1542 {
1543 e->iso3166 = l->iso3166;
1544 e->ccode[0] = (l->iso3166 / 256);
1545 e->ccode[1] = (l->iso3166 % 256);
1546 }
1547
1548 *len = (count * sizeof(struct iwinfo_country_entry));
1549 return 0;
1550 }
1551
1552 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
1553 {
1554 int *modes = arg;
1555 int bands_remain, freqs_remain;
1556 uint16_t caps = 0;
1557 struct nlattr **attr = nl80211_parse(msg);
1558 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1559 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1560 struct nlattr *band, *freq;
1561
1562 *modes = 0;
1563
1564 if (attr[NL80211_ATTR_WIPHY_BANDS])
1565 {
1566 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1567 {
1568 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1569 nla_len(band), NULL);
1570
1571 if (bands[NL80211_BAND_ATTR_HT_CAPA])
1572 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1573
1574 /* Treat any nonzero capability as 11n */
1575 if (caps > 0)
1576 *modes |= IWINFO_80211_N;
1577
1578 nla_for_each_nested(freq,
1579 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1580 {
1581 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1582 nla_data(freq), nla_len(freq), NULL);
1583
1584 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
1585 continue;
1586
1587 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
1588 {
1589 *modes |= IWINFO_80211_B;
1590 *modes |= IWINFO_80211_G;
1591 }
1592 else
1593 {
1594 *modes |= IWINFO_80211_A;
1595 }
1596 }
1597 }
1598 }
1599
1600 return NL_SKIP;
1601 }
1602
1603 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1604 {
1605 struct nl80211_msg_conveyor *req;
1606
1607 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1608 if (req)
1609 {
1610 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
1611 nl80211_free(req);
1612 }
1613
1614 return *buf ? 0 : -1;
1615 }
1616
1617 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1618 {
1619 /* Test whether we can create another interface */
1620 char *nif = nl80211_ifadd(ifname);
1621
1622 if (nif)
1623 {
1624 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
1625
1626 iwinfo_ifdown(nif);
1627 nl80211_ifdel(nif);
1628
1629 return 0;
1630 }
1631
1632 return -1;
1633 }
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