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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 return NL_SKIP;
109 }
110
111 static void nl80211_free(struct nl80211_msg_conveyor *cv)
112 {
113 if (cv)
114 {
115 if (cv->cb)
116 nl_cb_put(cv->cb);
117
118 if (cv->msg)
119 nlmsg_free(cv->msg);
120
121 cv->cb = NULL;
122 cv->msg = NULL;
123 }
124 }
125
126 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname, int cmd, int flags)
127 {
128 static struct nl80211_msg_conveyor cv;
129
130 int ifidx = -1, phyidx = -1;
131 struct nl_msg *req = NULL;
132 struct nl_cb *cb = NULL;
133
134 if (nl80211_init() < 0)
135 goto err;
136
137 if (!strncmp(ifname, "phy", 3))
138 phyidx = atoi(&ifname[3]);
139 else if (!strncmp(ifname, "radio", 5))
140 phyidx = atoi(&ifname[5]);
141 else if (!strncmp(ifname, "mon.", 4))
142 ifidx = if_nametoindex(&ifname[4]);
143 else
144 ifidx = if_nametoindex(ifname);
145
146 if ((ifidx < 0) && (phyidx < 0))
147 return NULL;
148
149 req = nlmsg_alloc();
150 if (!req)
151 goto err;
152
153 cb = nl_cb_alloc(NL_CB_DEFAULT);
154 if (!cb)
155 goto err;
156
157 genlmsg_put(req, 0, 0, genl_family_get_id(nls->nl80211), 0,
158 flags, cmd, 0);
159
160 if (ifidx > -1)
161 NLA_PUT_U32(req, NL80211_ATTR_IFINDEX, ifidx);
162
163 if (phyidx > -1)
164 NLA_PUT_U32(req, NL80211_ATTR_WIPHY, phyidx);
165
166 cv.msg = req;
167 cv.cb = cb;
168
169 return &cv;
170
171 err:
172 nla_put_failure:
173 if (cb)
174 nl_cb_put(cb);
175
176 if (req)
177 nlmsg_free(req);
178
179 return NULL;
180 }
181
182 static struct nl80211_msg_conveyor * nl80211_send(
183 struct nl80211_msg_conveyor *cv,
184 int (*cb_func)(struct nl_msg *, void *), void *cb_arg
185 ) {
186 static struct nl80211_msg_conveyor rcv;
187 int err = 1;
188
189 if (cb_func)
190 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
191 else
192 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
193
194 if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
195 goto err;
196
197 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
198 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
199 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
200
201 while (err > 0)
202 nl_recvmsgs(nls->nl_sock, cv->cb);
203
204 return &rcv;
205
206 err:
207 nl_cb_put(cv->cb);
208 nlmsg_free(cv->msg);
209
210 return NULL;
211 }
212
213 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
214 {
215 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
216 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
217
218 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
219 genlmsg_attrlen(gnlh, 0), NULL);
220
221 return attr;
222 }
223
224 static int nl80211_freq2channel(int freq)
225 {
226 if (freq == 2484)
227 return 14;
228
229 if (freq < 2484)
230 return (freq - 2407) / 5;
231
232 return (freq / 5) - 1000;
233 }
234
235 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
236 {
237 int i, len;
238 char lkey[64] = { 0 };
239 const char *ln = buf;
240 static char lval[256] = { 0 };
241
242 int matched_if = ifname ? 0 : 1;
243
244
245 for( i = 0, len = strlen(buf); i < len; i++ )
246 {
247 if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
248 {
249 ln++;
250 }
251 else if (!lkey[0] && (buf[i] == '='))
252 {
253 if ((&buf[i] - ln) > 0)
254 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
255 }
256 else if (buf[i] == '\n')
257 {
258 if (lkey[0])
259 {
260 memcpy(lval, ln + strlen(lkey) + 1,
261 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
262
263 if ((ifname != NULL) &&
264 (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
265 {
266 matched_if = !strcmp(lval, ifname);
267 }
268 else if (matched_if && !strcmp(lkey, key))
269 {
270 return lval;
271 }
272 }
273
274 ln = &buf[i+1];
275 memset(lkey, 0, sizeof(lkey));
276 memset(lval, 0, sizeof(lval));
277 }
278 }
279
280 return NULL;
281 }
282
283 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
284 {
285 char *buf = arg;
286 struct nlattr **attr = nl80211_parse(msg);
287
288 if (attr[NL80211_ATTR_WIPHY_NAME])
289 sprintf(buf, "%s", nla_data(attr[NL80211_ATTR_WIPHY_NAME]));
290 else
291 buf[0] = 0;
292
293 return NL_SKIP;
294 }
295
296 static char * nl80211_ifname2phy(const char *ifname)
297 {
298 static char phy[32] = { 0 };
299 struct nl80211_msg_conveyor *req;
300
301 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
302 if (req)
303 {
304 nl80211_send(req, nl80211_ifname2phy_cb, phy);
305 nl80211_free(req);
306 }
307
308 return phy[0] ? phy : NULL;
309 }
310
311 static char * nl80211_hostapd_info(const char *ifname)
312 {
313 char *phy;
314 char path[32] = { 0 };
315 static char buf[4096] = { 0 };
316 FILE *conf;
317
318 if ((phy = nl80211_ifname2phy(ifname)) != NULL)
319 {
320 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
321
322 if ((conf = fopen(path, "r")) != NULL)
323 {
324 fread(buf, sizeof(buf) - 1, 1, conf);
325 fclose(conf);
326
327 return buf;
328 }
329 }
330
331 return NULL;
332 }
333
334 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
335 {
336 fd_set rfds;
337 struct timeval tv = { 2, 0 };
338
339 FD_ZERO(&rfds);
340 FD_SET(sock, &rfds);
341
342 memset(buf, 0, blen);
343
344
345 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
346 return -1;
347
348 if (!FD_ISSET(sock, &rfds))
349 return -1;
350
351 return recv(sock, buf, blen, 0);
352 }
353
354 static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
355 const char *event)
356 {
357 int numtry = 0;
358 int sock = -1;
359 char *rv = NULL;
360 size_t remote_length, local_length;
361 static char buffer[10240] = { 0 };
362
363 struct sockaddr_un local = { 0 };
364 struct sockaddr_un remote = { 0 };
365
366
367 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
368 if (sock < 0)
369 return NULL;
370
371 remote.sun_family = AF_UNIX;
372 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
373 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
374
375 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
376 goto out;
377
378 if (connect(sock, (struct sockaddr *) &remote, remote_length))
379 goto out;
380
381 local.sun_family = AF_UNIX;
382 local_length = sizeof(local.sun_family) + sprintf(local.sun_path,
383 "/var/run/iwinfo-%s-%d", ifname, getpid());
384
385 if (bind(sock, (struct sockaddr *) &local, local_length))
386 goto out;
387
388
389 send(sock, "ATTACH", 6, 0);
390
391 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
392 goto out;
393
394
395 send(sock, cmd, strlen(cmd), 0);
396
397 while( numtry++ < 5 )
398 {
399 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
400 {
401 if (event)
402 continue;
403
404 break;
405 }
406
407 if ((!event && buffer[0] != '<') || strstr(buffer, event))
408 break;
409 }
410
411 rv = buffer;
412
413 out:
414 close(sock);
415
416 if (local.sun_family)
417 unlink(local.sun_path);
418
419 return rv;
420 }
421
422 static inline int nl80211_readint(const char *path)
423 {
424 int fd;
425 int rv = -1;
426 char buffer[16];
427
428 if ((fd = open(path, O_RDONLY)) > -1)
429 {
430 if (read(fd, buffer, sizeof(buffer)) > 0)
431 rv = atoi(buffer);
432
433 close(fd);
434 }
435
436 return rv;
437 }
438
439 static char * nl80211_phy2ifname(const char *ifname)
440 {
441 int fd, ifidx = -1, cifidx = -1, phyidx = -1;
442 char buffer[64];
443 static char nif[IFNAMSIZ] = { 0 };
444
445 DIR *d;
446 struct dirent *e;
447
448 if (!ifname)
449 return NULL;
450 else if (!strncmp(ifname, "phy", 3))
451 phyidx = atoi(&ifname[3]);
452 else if (!strncmp(ifname, "radio", 5))
453 phyidx = atoi(&ifname[5]);
454
455 if (phyidx > -1)
456 {
457 if ((d = opendir("/sys/class/net")) != NULL)
458 {
459 while( (e = readdir(d)) != NULL )
460 {
461 snprintf(buffer, sizeof(buffer),
462 "/sys/class/net/%s/phy80211/index", e->d_name);
463
464 if (nl80211_readint(buffer) == phyidx)
465 {
466 snprintf(buffer, sizeof(buffer),
467 "/sys/class/net/%s/ifindex", e->d_name);
468
469 if( (cifidx = nl80211_readint(buffer)) >= 0 &&
470 ((ifidx < 0) || (cifidx < ifidx)) )
471 {
472 ifidx = cifidx;
473 strncpy(nif, e->d_name, sizeof(nif));
474 }
475 }
476 }
477
478 closedir(d);
479 }
480 }
481
482 return nif[0] ? nif : NULL;
483 }
484
485 static char * nl80211_ifadd(const char *ifname)
486 {
487 int phyidx;
488 char *rv = NULL;
489 static char nif[IFNAMSIZ] = { 0 };
490 struct nl80211_msg_conveyor *req, *res;
491
492 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
493 if (req)
494 {
495 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
496
497 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
498 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
499
500 nl80211_send(req, NULL, NULL);
501
502 rv = nif;
503
504 nla_put_failure:
505 nl80211_free(req);
506 }
507
508 return rv;
509 }
510
511 static void nl80211_ifdel(const char *ifname)
512 {
513 struct nl80211_msg_conveyor *req;
514
515 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
516 if (req)
517 {
518 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
519
520 nl80211_send(req, NULL, NULL);
521
522 nla_put_failure:
523 nl80211_free(req);
524 }
525 }
526
527 static void nl80211_hostapd_hup(const char *ifname)
528 {
529 int fd, pid = 0;
530 char buf[32];
531 char *phy = nl80211_ifname2phy(ifname);
532
533 if (phy)
534 {
535 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
536 if ((fd = open(buf, O_RDONLY)) > 0)
537 {
538 if (read(fd, buf, sizeof(buf)) > 0)
539 pid = atoi(buf);
540
541 close(fd);
542 }
543
544 if (pid > 0)
545 kill(pid, 1);
546 }
547 }
548
549
550 int nl80211_probe(const char *ifname)
551 {
552 return !!nl80211_ifname2phy(ifname);
553 }
554
555 void nl80211_close(void)
556 {
557 if (nls)
558 {
559 if (nls->nl_sock)
560 nl_socket_free(nls->nl_sock);
561
562 if (nls->nl_cache)
563 nl_cache_free(nls->nl_cache);
564
565 free(nls);
566 nls = NULL;
567 }
568 }
569
570 int nl80211_get_mode(const char *ifname, char *buf)
571 {
572 return wext_get_mode(ifname, buf);
573 }
574
575 int nl80211_get_ssid(const char *ifname, char *buf)
576 {
577 char *ssid;
578
579 if (!wext_get_ssid(ifname, buf))
580 {
581 return 0;
582 }
583 else if( (ssid = nl80211_hostapd_info(ifname)) &&
584 (ssid = nl80211_getval(ifname, ssid, "ssid")) )
585 {
586 memcpy(buf, ssid, strlen(ssid));
587 return 0;
588 }
589
590 return -1;
591 }
592
593 int nl80211_get_bssid(const char *ifname, char *buf)
594 {
595 char *bssid;
596 unsigned char mac[6];
597
598 if (!wext_get_bssid(ifname, buf))
599 {
600 return 0;
601 }
602 else if((bssid = nl80211_hostapd_info(ifname)) &&
603 (bssid = nl80211_getval(ifname, bssid, "bssid")))
604 {
605 mac[0] = strtol(&bssid[0], NULL, 16);
606 mac[1] = strtol(&bssid[3], NULL, 16);
607 mac[2] = strtol(&bssid[6], NULL, 16);
608 mac[3] = strtol(&bssid[9], NULL, 16);
609 mac[4] = strtol(&bssid[12], NULL, 16);
610 mac[5] = strtol(&bssid[15], NULL, 16);
611
612 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
613 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
614
615 return 0;
616 }
617
618 return -1;
619 }
620
621 int nl80211_get_channel(const char *ifname, int *buf)
622 {
623 char *first;
624
625 if (!wext_get_channel(ifname, buf))
626 return 0;
627
628 else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
629 return wext_get_channel(first, buf);
630
631 return -1;
632 }
633
634 int nl80211_get_frequency(const char *ifname, int *buf)
635 {
636 char *first;
637
638 if (!wext_get_frequency(ifname, buf))
639 return 0;
640
641 else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
642 return wext_get_frequency(first, buf);
643
644 return -1;
645 }
646
647 int nl80211_get_txpower(const char *ifname, int *buf)
648 {
649 return wext_get_txpower(ifname, buf);
650 }
651
652
653 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
654 {
655 int8_t dbm;
656 int16_t mbit;
657 struct nl80211_rssi_rate *rr = arg;
658 struct nlattr **attr = nl80211_parse(msg);
659 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
660 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
661
662 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
663 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
664 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
665 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
666 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
667 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
668 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
669 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
670 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
671 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
672 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
673 };
674
675 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
676 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
677 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
678 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
679 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
680 };
681
682 if (attr[NL80211_ATTR_STA_INFO])
683 {
684 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
685 attr[NL80211_ATTR_STA_INFO], stats_policy) )
686 {
687 if (sinfo[NL80211_STA_INFO_SIGNAL])
688 {
689 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
690 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
691 }
692
693 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
694 {
695 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
696 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
697 {
698 if (rinfo[NL80211_RATE_INFO_BITRATE])
699 {
700 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
701 rr->rate = rr->rate
702 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
703 }
704 }
705 }
706 }
707 }
708
709 return NL_SKIP;
710 }
711
712 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
713 {
714 DIR *d;
715 struct dirent *de;
716 struct nl80211_msg_conveyor *req;
717
718 r->rssi = 0;
719 r->rate = 0;
720
721 if ((d = opendir("/sys/class/net")) != NULL)
722 {
723 while ((de = readdir(d)) != NULL)
724 {
725 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
726 (!de->d_name[strlen(ifname)] ||
727 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
728 {
729 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
730 NLM_F_DUMP);
731
732 if (req)
733 {
734 nl80211_send(req, nl80211_fill_signal_cb, r);
735 nl80211_free(req);
736 }
737 }
738 }
739
740 closedir(d);
741 }
742 }
743
744 int nl80211_get_bitrate(const char *ifname, int *buf)
745 {
746 struct nl80211_rssi_rate rr;
747
748 if (!wext_get_bitrate(ifname, buf))
749 return 0;
750
751 nl80211_fill_signal(ifname, &rr);
752
753 if (rr.rate)
754 {
755 *buf = (rr.rate * 100);
756 return 0;
757 }
758
759 return -1;
760 }
761
762 int nl80211_get_signal(const char *ifname, int *buf)
763 {
764 struct nl80211_rssi_rate rr;
765
766 if (!wext_get_signal(ifname, buf))
767 return 0;
768
769 nl80211_fill_signal(ifname, &rr);
770
771 if (rr.rssi)
772 {
773 *buf = rr.rssi;
774 return 0;
775 }
776
777 return -1;
778 }
779
780 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
781 {
782 int8_t *noise = arg;
783 struct nlattr **tb = nl80211_parse(msg);
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 if (!tb[NL80211_ATTR_SURVEY_INFO])
792 return NL_SKIP;
793
794 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
795 tb[NL80211_ATTR_SURVEY_INFO], sp))
796 return NL_SKIP;
797
798 if (!si[NL80211_SURVEY_INFO_NOISE])
799 return NL_SKIP;
800
801 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
802 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
803
804 return NL_SKIP;
805 }
806
807
808 int nl80211_get_noise(const char *ifname, int *buf)
809 {
810 int8_t noise;
811 struct nl80211_msg_conveyor *req;
812
813 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
814 if (req)
815 {
816 noise = 0;
817
818 nl80211_send(req, nl80211_get_noise_cb, &noise);
819 nl80211_free(req);
820
821 if (noise)
822 {
823 *buf = noise;
824 return 0;
825 }
826 }
827
828 return -1;
829 }
830
831 int nl80211_get_quality(const char *ifname, int *buf)
832 {
833 int signal;
834
835 if (wext_get_quality(ifname, buf))
836 {
837 *buf = 0;
838
839 if (!nl80211_get_signal(ifname, &signal))
840 {
841 /* A positive signal level is usually just a quality
842 * value, pass through as-is */
843 if (signal >= 0)
844 {
845 *buf = signal;
846 }
847
848 /* The cfg80211 wext compat layer assumes a signal range
849 * of -110 dBm to -40 dBm, the quality value is derived
850 * by adding 110 to the signal level */
851 else
852 {
853 if (signal < -110)
854 signal = -110;
855 else if (signal > -40)
856 signal = -40;
857
858 *buf = (signal + 110);
859 }
860 }
861 }
862
863 return 0;
864 }
865
866 int nl80211_get_quality_max(const char *ifname, int *buf)
867 {
868 if (wext_get_quality_max(ifname, buf))
869 /* The cfg80211 wext compat layer assumes a maximum
870 * quality of 70 */
871 *buf = 70;
872
873 return 0;
874 }
875
876 int nl80211_get_encryption(const char *ifname, char *buf)
877 {
878 int i;
879 char k[9];
880 char *val, *res;
881 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
882
883 /* WPA supplicant */
884 if( (res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
885 (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
886 {
887 /* WEP */
888 if (strstr(val, "WEP"))
889 {
890 if (strstr(val, "WEP-40"))
891 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
892
893 else if (strstr(val, "WEP-104"))
894 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
895
896 c->enabled = 1;
897 c->group_ciphers = c->pair_ciphers;
898
899 c->auth_suites |= IWINFO_KMGMT_NONE;
900 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
901 }
902
903 /* WPA */
904 else
905 {
906 if (strstr(val, "TKIP"))
907 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
908
909 else if (strstr(val, "CCMP"))
910 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
911
912 else if (strstr(val, "NONE"))
913 c->pair_ciphers |= IWINFO_CIPHER_NONE;
914
915 else if (strstr(val, "WEP-40"))
916 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
917
918 else if (strstr(val, "WEP-104"))
919 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
920
921
922 if ((val = nl80211_getval(NULL, res, "group_cipher")))
923 {
924 if (strstr(val, "TKIP"))
925 c->group_ciphers |= IWINFO_CIPHER_TKIP;
926
927 else if (strstr(val, "CCMP"))
928 c->group_ciphers |= IWINFO_CIPHER_CCMP;
929
930 else if (strstr(val, "NONE"))
931 c->group_ciphers |= IWINFO_CIPHER_NONE;
932
933 else if (strstr(val, "WEP-40"))
934 c->group_ciphers |= IWINFO_CIPHER_WEP40;
935
936 else if (strstr(val, "WEP-104"))
937 c->group_ciphers |= IWINFO_CIPHER_WEP104;
938 }
939
940
941 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
942 {
943 if (strstr(val, "WPA2"))
944 c->wpa_version = 2;
945
946 else if (strstr(val, "WPA"))
947 c->wpa_version = 1;
948
949
950 if (strstr(val, "PSK"))
951 c->auth_suites |= IWINFO_KMGMT_PSK;
952
953 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
954 c->auth_suites |= IWINFO_KMGMT_8021x;
955
956 else if (strstr(val, "NONE"))
957 c->auth_suites |= IWINFO_KMGMT_NONE;
958 }
959
960 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
961 }
962
963 return 0;
964 }
965
966 /* Hostapd */
967 else if ((res = nl80211_hostapd_info(ifname)))
968 {
969 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
970 c->wpa_version = atoi(val);
971
972 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
973
974 if (!val || strstr(val, "PSK"))
975 c->auth_suites |= IWINFO_KMGMT_PSK;
976
977 if (val && strstr(val, "EAP"))
978 c->auth_suites |= IWINFO_KMGMT_8021x;
979
980 if (val && strstr(val, "NONE"))
981 c->auth_suites |= IWINFO_KMGMT_NONE;
982
983 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
984 {
985 if (strstr(val, "TKIP"))
986 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
987
988 if (strstr(val, "CCMP"))
989 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
990
991 if (strstr(val, "NONE"))
992 c->pair_ciphers |= IWINFO_CIPHER_NONE;
993 }
994
995 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
996 {
997 switch(atoi(val)) {
998 case 1:
999 c->auth_algs |= IWINFO_AUTH_OPEN;
1000 break;
1001
1002 case 2:
1003 c->auth_algs |= IWINFO_AUTH_SHARED;
1004 break;
1005
1006 case 3:
1007 c->auth_algs |= IWINFO_AUTH_OPEN;
1008 c->auth_algs |= IWINFO_AUTH_SHARED;
1009 break;
1010
1011 default:
1012 break;
1013 }
1014
1015 for( i = 0; i < 4; i++ )
1016 {
1017 snprintf(k, sizeof(k), "wep_key%d", i);
1018
1019 if ((val = nl80211_getval(ifname, res, k)))
1020 {
1021 if ((strlen(val) == 5) || (strlen(val) == 10))
1022 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1023
1024 else if ((strlen(val) == 13) || (strlen(val) == 26))
1025 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1026 }
1027 }
1028 }
1029
1030 c->group_ciphers = c->pair_ciphers;
1031 c->enabled = (c->auth_algs || c->auth_suites) ? 1 : 0;
1032
1033 return 0;
1034 }
1035
1036 return -1;
1037 }
1038
1039
1040 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1041 {
1042 struct nl80211_array_buf *arr = arg;
1043 struct iwinfo_assoclist_entry *e = arr->buf;
1044 struct nlattr **attr = nl80211_parse(msg);
1045 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1046
1047 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1048 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1049 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1050 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1051 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1052 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1053 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1054 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1055 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1056 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1057 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1058 };
1059
1060 /* advance to end of array */
1061 e += arr->count;
1062
1063 if (attr[NL80211_ATTR_MAC])
1064 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1065
1066 if (attr[NL80211_ATTR_STA_INFO])
1067 {
1068 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1069 attr[NL80211_ATTR_STA_INFO], stats_policy))
1070 {
1071 if (sinfo[NL80211_STA_INFO_SIGNAL])
1072 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1073 }
1074 }
1075
1076 e->noise = 0; /* filled in by caller */
1077 arr->count++;
1078
1079 return NL_SKIP;
1080 }
1081
1082 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1083 {
1084 DIR *d;
1085 int i, noise = 0;
1086 struct dirent *de;
1087 struct nl80211_msg_conveyor *req;
1088 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1089 struct iwinfo_assoclist_entry *e;
1090
1091 if ((d = opendir("/sys/class/net")) != NULL)
1092 {
1093 while ((de = readdir(d)) != NULL)
1094 {
1095 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1096 (!de->d_name[strlen(ifname)] ||
1097 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1098 {
1099 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1100 NLM_F_DUMP);
1101
1102 if (req)
1103 {
1104 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1105 nl80211_free(req);
1106 }
1107
1108 break;
1109 }
1110 }
1111
1112 closedir(d);
1113
1114 if (!nl80211_get_noise(ifname, &noise))
1115 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1116 e->noise = noise;
1117
1118 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1119 return 0;
1120 }
1121
1122 return -1;
1123 }
1124
1125 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1126 {
1127 int *dbm_max = arg;
1128 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1129
1130 struct nlattr **attr = nl80211_parse(msg);
1131 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1132 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1133 struct nlattr *band, *freq;
1134
1135 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1136 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1137 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1138 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1139 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1140 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1141 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1142 };
1143
1144 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1145 *dbm_max = -1;
1146
1147 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1148 {
1149 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1150 nla_len(band), NULL);
1151
1152 nla_for_each_nested(freq,
1153 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1154 {
1155 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1156 nla_data(freq), nla_len(freq), freq_policy);
1157
1158 ch_cmp = nl80211_freq2channel(
1159 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1160
1161 if( (!ch_cur || (ch_cmp == ch_cur)) &&
1162 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1163 {
1164 *dbm_max = (int)(0.01 * nla_get_u32(
1165 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1166
1167 break;
1168 }
1169 }
1170 }
1171
1172 return NL_SKIP;
1173 }
1174
1175 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1176 {
1177 int ch_cur;
1178 int dbm_max = -1, dbm_cur, dbm_cnt;
1179 struct nl80211_msg_conveyor *req;
1180 struct iwinfo_txpwrlist_entry entry;
1181
1182 if (nl80211_get_channel(ifname, &ch_cur))
1183 ch_cur = 0;
1184
1185 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1186 if (req)
1187 {
1188 /* initialize the value pointer with channel for callback */
1189 dbm_max = ch_cur;
1190
1191 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1192 nl80211_free(req);
1193 }
1194
1195 if (dbm_max > -1)
1196 {
1197 for (dbm_cur = 0, dbm_cnt = 0;
1198 dbm_cur < dbm_max;
1199 dbm_cur++, dbm_cnt++)
1200 {
1201 entry.dbm = dbm_cur;
1202 entry.mw = iwinfo_dbm2mw(dbm_cur);
1203
1204 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1205 }
1206
1207 entry.dbm = dbm_max;
1208 entry.mw = iwinfo_dbm2mw(dbm_max);
1209
1210 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1211 dbm_cnt++;
1212
1213 *len = dbm_cnt * sizeof(entry);
1214 return 0;
1215 }
1216
1217 return -1;
1218 }
1219
1220 static void nl80211_get_scancrypto(const char *spec,
1221 struct iwinfo_crypto_entry *c)
1222 {
1223 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1224 {
1225 c->enabled = 1;
1226
1227 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1228 c->wpa_version = 3;
1229
1230 else if (strstr(spec, "WPA2"))
1231 c->wpa_version = 2;
1232
1233 else if (strstr(spec, "WPA"))
1234 c->wpa_version = 1;
1235
1236 else if (strstr(spec, "WEP"))
1237 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1238
1239
1240 if (strstr(spec, "PSK"))
1241 c->auth_suites |= IWINFO_KMGMT_PSK;
1242
1243 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1244 c->auth_suites |= IWINFO_KMGMT_8021x;
1245
1246 if (strstr(spec, "WPA-NONE"))
1247 c->auth_suites |= IWINFO_KMGMT_NONE;
1248
1249
1250 if (strstr(spec, "TKIP"))
1251 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1252
1253 if (strstr(spec, "CCMP"))
1254 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1255
1256 if (strstr(spec, "WEP-40"))
1257 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1258
1259 if (strstr(spec, "WEP-104"))
1260 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1261
1262 c->group_ciphers = c->pair_ciphers;
1263 }
1264 else
1265 {
1266 c->enabled = 0;
1267 }
1268 }
1269
1270 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1271 {
1272 int freq, rssi, qmax, count;
1273 char *res;
1274 char ssid[128] = { 0 };
1275 char bssid[18] = { 0 };
1276 char cipher[256] = { 0 };
1277
1278 /* Got a radioX pseudo interface, find some interface on it or create one */
1279 if (!strncmp(ifname, "radio", 5))
1280 {
1281 /* Reuse existing interface */
1282 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1283 {
1284 return nl80211_get_scanlist(res, buf, len);
1285 }
1286
1287 /* Need to spawn a temporary iface for scanning */
1288 else if ((res = nl80211_ifadd(ifname)) != NULL)
1289 {
1290 count = nl80211_get_scanlist(res, buf, len);
1291 nl80211_ifdel(res);
1292 return count;
1293 }
1294 }
1295
1296 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1297
1298 /* WPA supplicant */
1299 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1300 {
1301 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1302 {
1303 nl80211_get_quality_max(ifname, &qmax);
1304
1305 /* skip header line */
1306 while( *res++ != '\n' );
1307
1308 count = 0;
1309
1310 while( sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1311 bssid, &freq, &rssi, cipher, ssid) > 0 )
1312 {
1313 /* BSSID */
1314 e->mac[0] = strtol(&bssid[0], NULL, 16);
1315 e->mac[1] = strtol(&bssid[3], NULL, 16);
1316 e->mac[2] = strtol(&bssid[6], NULL, 16);
1317 e->mac[3] = strtol(&bssid[9], NULL, 16);
1318 e->mac[4] = strtol(&bssid[12], NULL, 16);
1319 e->mac[5] = strtol(&bssid[15], NULL, 16);
1320
1321 /* SSID */
1322 memcpy(e->ssid, ssid,
1323 min(strlen(ssid), sizeof(e->ssid) - 1));
1324
1325 /* Mode (assume master) */
1326 sprintf((char *)e->mode, "Master");
1327
1328 /* Channel */
1329 e->channel = nl80211_freq2channel(freq);
1330
1331 /* Signal */
1332 e->signal = rssi;
1333
1334 /* Quality */
1335 if (rssi < 0)
1336 {
1337 /* The cfg80211 wext compat layer assumes a signal range
1338 * of -110 dBm to -40 dBm, the quality value is derived
1339 * by adding 110 to the signal level */
1340 if (rssi < -110)
1341 rssi = -110;
1342 else if (rssi > -40)
1343 rssi = -40;
1344
1345 e->quality = (rssi + 110);
1346 }
1347 else
1348 {
1349 e->quality = rssi;
1350 }
1351
1352 /* Max. Quality */
1353 e->quality_max = qmax;
1354
1355 /* Crypto */
1356 nl80211_get_scancrypto(cipher, &e->crypto);
1357
1358 /* advance to next line */
1359 while( *res && *res++ != '\n' );
1360
1361 count++;
1362 e++;
1363
1364 memset(ssid, 0, sizeof(ssid));
1365 memset(bssid, 0, sizeof(bssid));
1366 memset(cipher, 0, sizeof(cipher));
1367 }
1368
1369 *len = count * sizeof(struct iwinfo_scanlist_entry);
1370 return 0;
1371 }
1372 }
1373
1374 /* AP scan */
1375 else
1376 {
1377 /* Got a temp interface, don't create yet another one */
1378 if (!strncmp(ifname, "tmp.", 4))
1379 {
1380 if (!iwinfo_ifup(ifname))
1381 return -1;
1382
1383 wext_get_scanlist(ifname, buf, len);
1384 iwinfo_ifdown(ifname);
1385 return 0;
1386 }
1387
1388 /* Spawn a new scan interface */
1389 else
1390 {
1391 if (!(res = nl80211_ifadd(ifname)))
1392 goto out;
1393
1394 if (!iwinfo_ifmac(res))
1395 goto out;
1396
1397 /* if we can take the new interface up, the driver supports an
1398 * additional interface and there's no need to tear down the ap */
1399 if (iwinfo_ifup(res))
1400 {
1401 wext_get_scanlist(res, buf, len);
1402 iwinfo_ifdown(res);
1403 }
1404
1405 /* driver cannot create secondary interface, take down ap
1406 * during scan */
1407 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1408 {
1409 wext_get_scanlist(res, buf, len);
1410 iwinfo_ifdown(res);
1411 iwinfo_ifup(ifname);
1412 nl80211_hostapd_hup(ifname);
1413 }
1414
1415 out:
1416 nl80211_ifdel(res);
1417 return 0;
1418 }
1419 }
1420
1421 return -1;
1422 }
1423
1424 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
1425 {
1426 int bands_remain, freqs_remain;
1427
1428 struct nl80211_array_buf *arr = arg;
1429 struct iwinfo_freqlist_entry *e = arr->buf;
1430
1431 struct nlattr **attr = nl80211_parse(msg);
1432 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1433 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1434 struct nlattr *band, *freq;
1435
1436 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1437 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1438 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1439 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1440 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1441 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1442 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1443 };
1444
1445 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1446 {
1447 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1448 nla_len(band), NULL);
1449
1450 nla_for_each_nested(freq,
1451 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1452 {
1453 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1454 nla_data(freq), nla_len(freq), NULL);
1455
1456 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1457 freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1458 continue;
1459
1460 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1461 e->channel = nl80211_freq2channel(e->mhz);
1462
1463 e->restricted = (
1464 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1465 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
1466 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1467 ) ? 1 : 0;
1468
1469 e++;
1470 arr->count++;
1471 }
1472 }
1473
1474 return NL_SKIP;
1475 }
1476
1477 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1478 {
1479 struct nl80211_msg_conveyor *req;
1480 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1481
1482 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1483 if (req)
1484 {
1485 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
1486 nl80211_free(req);
1487 }
1488
1489 if (arr.count > 0)
1490 {
1491 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
1492 return 0;
1493 }
1494
1495 return -1;
1496 }
1497
1498 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
1499 {
1500 char *buf = arg;
1501 struct nlattr **attr = nl80211_parse(msg);
1502
1503 if (attr[NL80211_ATTR_REG_ALPHA2])
1504 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
1505 else
1506 buf[0] = 0;
1507
1508 return NL_SKIP;
1509 }
1510
1511 int nl80211_get_country(const char *ifname, char *buf)
1512 {
1513 int rv = -1;
1514 struct nl80211_msg_conveyor *req;
1515
1516 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1517 if (req)
1518 {
1519 nl80211_send(req, nl80211_get_country_cb, buf);
1520 nl80211_free(req);
1521
1522 if (buf[0])
1523 rv = 0;
1524 }
1525
1526 return rv;
1527 }
1528
1529 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1530 {
1531 int i, count;
1532 struct iwinfo_iso3166_label *l;
1533 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1534
1535 for( l = ISO3166_Names, count = 0; l->iso3166; l++, e++, count++ )
1536 {
1537 e->iso3166 = l->iso3166;
1538 e->ccode[0] = (l->iso3166 / 256);
1539 e->ccode[1] = (l->iso3166 % 256);
1540 }
1541
1542 *len = (count * sizeof(struct iwinfo_country_entry));
1543 return 0;
1544 }
1545
1546 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
1547 {
1548 int *modes = arg;
1549 int bands_remain, freqs_remain;
1550 uint16_t caps = 0;
1551 struct nlattr **attr = nl80211_parse(msg);
1552 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1553 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1554 struct nlattr *band, *freq;
1555
1556 *modes = 0;
1557
1558 if (attr[NL80211_ATTR_WIPHY_BANDS])
1559 {
1560 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1561 {
1562 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1563 nla_len(band), NULL);
1564
1565 if (bands[NL80211_BAND_ATTR_HT_CAPA])
1566 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1567
1568 /* Treat any nonzero capability as 11n */
1569 if (caps > 0)
1570 *modes |= IWINFO_80211_N;
1571
1572 nla_for_each_nested(freq,
1573 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1574 {
1575 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1576 nla_data(freq), nla_len(freq), NULL);
1577
1578 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
1579 continue;
1580
1581 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
1582 {
1583 *modes |= IWINFO_80211_B;
1584 *modes |= IWINFO_80211_G;
1585 }
1586 else
1587 {
1588 *modes |= IWINFO_80211_A;
1589 }
1590 }
1591 }
1592 }
1593
1594 return NL_SKIP;
1595 }
1596
1597 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1598 {
1599 struct nl80211_msg_conveyor *req;
1600
1601 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1602 if (req)
1603 {
1604 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
1605 nl80211_free(req);
1606 }
1607
1608 return *buf ? 0 : -1;
1609 }
1610
1611 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1612 {
1613 /* Test whether we can create another interface */
1614 char *nif = nl80211_ifadd(ifname);
1615
1616 if (nif)
1617 {
1618 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
1619
1620 iwinfo_ifdown(nif);
1621 nl80211_ifdel(nif);
1622
1623 return 0;
1624 }
1625
1626 return -1;
1627 }
Lua Configuration Interface (mirror)