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d00d26b0adb401668dc71e3e93d134e8ee922fab
[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 memset(nif, 0, sizeof(nif));
456
457 if (phyidx > -1)
458 {
459 if ((d = opendir("/sys/class/net")) != NULL)
460 {
461 while( (e = readdir(d)) != NULL )
462 {
463 snprintf(buffer, sizeof(buffer),
464 "/sys/class/net/%s/phy80211/index", e->d_name);
465
466 if (nl80211_readint(buffer) == phyidx)
467 {
468 snprintf(buffer, sizeof(buffer),
469 "/sys/class/net/%s/ifindex", e->d_name);
470
471 if( (cifidx = nl80211_readint(buffer)) >= 0 &&
472 ((ifidx < 0) || (cifidx < ifidx)) )
473 {
474 ifidx = cifidx;
475 strncpy(nif, e->d_name, sizeof(nif));
476 }
477 }
478 }
479
480 closedir(d);
481 }
482 }
483
484 return nif[0] ? nif : NULL;
485 }
486
487 static char * nl80211_ifadd(const char *ifname)
488 {
489 int phyidx;
490 char *rv = NULL;
491 static char nif[IFNAMSIZ] = { 0 };
492 struct nl80211_msg_conveyor *req, *res;
493
494 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
495 if (req)
496 {
497 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
498
499 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
500 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
501
502 nl80211_send(req, NULL, NULL);
503
504 rv = nif;
505
506 nla_put_failure:
507 nl80211_free(req);
508 }
509
510 return rv;
511 }
512
513 static void nl80211_ifdel(const char *ifname)
514 {
515 struct nl80211_msg_conveyor *req;
516
517 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
518 if (req)
519 {
520 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
521
522 nl80211_send(req, NULL, NULL);
523
524 nla_put_failure:
525 nl80211_free(req);
526 }
527 }
528
529 static void nl80211_hostapd_hup(const char *ifname)
530 {
531 int fd, pid = 0;
532 char buf[32];
533 char *phy = nl80211_ifname2phy(ifname);
534
535 if (phy)
536 {
537 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
538 if ((fd = open(buf, O_RDONLY)) > 0)
539 {
540 if (read(fd, buf, sizeof(buf)) > 0)
541 pid = atoi(buf);
542
543 close(fd);
544 }
545
546 if (pid > 0)
547 kill(pid, 1);
548 }
549 }
550
551
552 int nl80211_probe(const char *ifname)
553 {
554 return !!nl80211_ifname2phy(ifname);
555 }
556
557 void nl80211_close(void)
558 {
559 if (nls)
560 {
561 if (nls->nl_sock)
562 nl_socket_free(nls->nl_sock);
563
564 if (nls->nl_cache)
565 nl_cache_free(nls->nl_cache);
566
567 free(nls);
568 nls = NULL;
569 }
570 }
571
572 int nl80211_get_mode(const char *ifname, char *buf)
573 {
574 return wext_get_mode(ifname, buf);
575 }
576
577 int nl80211_get_ssid(const char *ifname, char *buf)
578 {
579 char *ssid;
580
581 if (!wext_get_ssid(ifname, buf))
582 {
583 return 0;
584 }
585 else if( (ssid = nl80211_hostapd_info(ifname)) &&
586 (ssid = nl80211_getval(ifname, ssid, "ssid")) )
587 {
588 memcpy(buf, ssid, strlen(ssid));
589 return 0;
590 }
591
592 return -1;
593 }
594
595 int nl80211_get_bssid(const char *ifname, char *buf)
596 {
597 char *bssid;
598 unsigned char mac[6];
599
600 if (!wext_get_bssid(ifname, buf))
601 {
602 return 0;
603 }
604 else if((bssid = nl80211_hostapd_info(ifname)) &&
605 (bssid = nl80211_getval(ifname, bssid, "bssid")))
606 {
607 mac[0] = strtol(&bssid[0], NULL, 16);
608 mac[1] = strtol(&bssid[3], NULL, 16);
609 mac[2] = strtol(&bssid[6], NULL, 16);
610 mac[3] = strtol(&bssid[9], NULL, 16);
611 mac[4] = strtol(&bssid[12], NULL, 16);
612 mac[5] = strtol(&bssid[15], NULL, 16);
613
614 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
615 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
616
617 return 0;
618 }
619
620 return -1;
621 }
622
623 int nl80211_get_channel(const char *ifname, int *buf)
624 {
625 char *first;
626
627 if (!wext_get_channel(ifname, buf))
628 return 0;
629
630 else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
631 return wext_get_channel(first, buf);
632
633 return -1;
634 }
635
636 int nl80211_get_frequency(const char *ifname, int *buf)
637 {
638 char *first;
639
640 if (!wext_get_frequency(ifname, buf))
641 return 0;
642
643 else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
644 return wext_get_frequency(first, buf);
645
646 return -1;
647 }
648
649 int nl80211_get_txpower(const char *ifname, int *buf)
650 {
651 return wext_get_txpower(ifname, buf);
652 }
653
654
655 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
656 {
657 int8_t dbm;
658 int16_t mbit;
659 struct nl80211_rssi_rate *rr = arg;
660 struct nlattr **attr = nl80211_parse(msg);
661 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
662 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
663
664 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
665 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
666 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
667 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
668 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
669 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
670 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
671 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
672 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
673 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
674 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
675 };
676
677 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
678 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
679 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
680 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
681 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
682 };
683
684 if (attr[NL80211_ATTR_STA_INFO])
685 {
686 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
687 attr[NL80211_ATTR_STA_INFO], stats_policy) )
688 {
689 if (sinfo[NL80211_STA_INFO_SIGNAL])
690 {
691 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
692 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
693 }
694
695 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
696 {
697 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
698 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
699 {
700 if (rinfo[NL80211_RATE_INFO_BITRATE])
701 {
702 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
703 rr->rate = rr->rate
704 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
705 }
706 }
707 }
708 }
709 }
710
711 return NL_SKIP;
712 }
713
714 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
715 {
716 DIR *d;
717 struct dirent *de;
718 struct nl80211_msg_conveyor *req;
719
720 r->rssi = 0;
721 r->rate = 0;
722
723 if ((d = opendir("/sys/class/net")) != NULL)
724 {
725 while ((de = readdir(d)) != NULL)
726 {
727 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
728 (!de->d_name[strlen(ifname)] ||
729 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
730 {
731 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
732 NLM_F_DUMP);
733
734 if (req)
735 {
736 nl80211_send(req, nl80211_fill_signal_cb, r);
737 nl80211_free(req);
738 }
739 }
740 }
741
742 closedir(d);
743 }
744 }
745
746 int nl80211_get_bitrate(const char *ifname, int *buf)
747 {
748 struct nl80211_rssi_rate rr;
749
750 if (!wext_get_bitrate(ifname, buf))
751 return 0;
752
753 nl80211_fill_signal(ifname, &rr);
754
755 if (rr.rate)
756 {
757 *buf = (rr.rate * 100);
758 return 0;
759 }
760
761 return -1;
762 }
763
764 int nl80211_get_signal(const char *ifname, int *buf)
765 {
766 struct nl80211_rssi_rate rr;
767
768 if (!wext_get_signal(ifname, buf))
769 return 0;
770
771 nl80211_fill_signal(ifname, &rr);
772
773 if (rr.rssi)
774 {
775 *buf = rr.rssi;
776 return 0;
777 }
778
779 return -1;
780 }
781
782 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
783 {
784 int8_t *noise = arg;
785 struct nlattr **tb = nl80211_parse(msg);
786 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
787
788 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
789 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
790 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
791 };
792
793 if (!tb[NL80211_ATTR_SURVEY_INFO])
794 return NL_SKIP;
795
796 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
797 tb[NL80211_ATTR_SURVEY_INFO], sp))
798 return NL_SKIP;
799
800 if (!si[NL80211_SURVEY_INFO_NOISE])
801 return NL_SKIP;
802
803 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
804 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
805
806 return NL_SKIP;
807 }
808
809
810 int nl80211_get_noise(const char *ifname, int *buf)
811 {
812 int8_t noise;
813 struct nl80211_msg_conveyor *req;
814
815 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
816 if (req)
817 {
818 noise = 0;
819
820 nl80211_send(req, nl80211_get_noise_cb, &noise);
821 nl80211_free(req);
822
823 if (noise)
824 {
825 *buf = noise;
826 return 0;
827 }
828 }
829
830 return -1;
831 }
832
833 int nl80211_get_quality(const char *ifname, int *buf)
834 {
835 int signal;
836
837 if (wext_get_quality(ifname, buf))
838 {
839 *buf = 0;
840
841 if (!nl80211_get_signal(ifname, &signal))
842 {
843 /* A positive signal level is usually just a quality
844 * value, pass through as-is */
845 if (signal >= 0)
846 {
847 *buf = signal;
848 }
849
850 /* The cfg80211 wext compat layer assumes a signal range
851 * of -110 dBm to -40 dBm, the quality value is derived
852 * by adding 110 to the signal level */
853 else
854 {
855 if (signal < -110)
856 signal = -110;
857 else if (signal > -40)
858 signal = -40;
859
860 *buf = (signal + 110);
861 }
862 }
863 }
864
865 return 0;
866 }
867
868 int nl80211_get_quality_max(const char *ifname, int *buf)
869 {
870 if (wext_get_quality_max(ifname, buf))
871 /* The cfg80211 wext compat layer assumes a maximum
872 * quality of 70 */
873 *buf = 70;
874
875 return 0;
876 }
877
878 int nl80211_get_encryption(const char *ifname, char *buf)
879 {
880 int i;
881 char k[9];
882 char *val, *res;
883 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
884
885 /* WPA supplicant */
886 if( (res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
887 (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
888 {
889 /* WEP */
890 if (strstr(val, "WEP"))
891 {
892 if (strstr(val, "WEP-40"))
893 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
894
895 else if (strstr(val, "WEP-104"))
896 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
897
898 c->enabled = 1;
899 c->group_ciphers = c->pair_ciphers;
900
901 c->auth_suites |= IWINFO_KMGMT_NONE;
902 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
903 }
904
905 /* WPA */
906 else
907 {
908 if (strstr(val, "TKIP"))
909 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
910
911 else if (strstr(val, "CCMP"))
912 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
913
914 else if (strstr(val, "NONE"))
915 c->pair_ciphers |= IWINFO_CIPHER_NONE;
916
917 else if (strstr(val, "WEP-40"))
918 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
919
920 else if (strstr(val, "WEP-104"))
921 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
922
923
924 if ((val = nl80211_getval(NULL, res, "group_cipher")))
925 {
926 if (strstr(val, "TKIP"))
927 c->group_ciphers |= IWINFO_CIPHER_TKIP;
928
929 else if (strstr(val, "CCMP"))
930 c->group_ciphers |= IWINFO_CIPHER_CCMP;
931
932 else if (strstr(val, "NONE"))
933 c->group_ciphers |= IWINFO_CIPHER_NONE;
934
935 else if (strstr(val, "WEP-40"))
936 c->group_ciphers |= IWINFO_CIPHER_WEP40;
937
938 else if (strstr(val, "WEP-104"))
939 c->group_ciphers |= IWINFO_CIPHER_WEP104;
940 }
941
942
943 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
944 {
945 if (strstr(val, "WPA2"))
946 c->wpa_version = 2;
947
948 else if (strstr(val, "WPA"))
949 c->wpa_version = 1;
950
951
952 if (strstr(val, "PSK"))
953 c->auth_suites |= IWINFO_KMGMT_PSK;
954
955 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
956 c->auth_suites |= IWINFO_KMGMT_8021x;
957
958 else if (strstr(val, "NONE"))
959 c->auth_suites |= IWINFO_KMGMT_NONE;
960 }
961
962 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
963 }
964
965 return 0;
966 }
967
968 /* Hostapd */
969 else if ((res = nl80211_hostapd_info(ifname)))
970 {
971 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
972 c->wpa_version = atoi(val);
973
974 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
975
976 if (!val || strstr(val, "PSK"))
977 c->auth_suites |= IWINFO_KMGMT_PSK;
978
979 if (val && strstr(val, "EAP"))
980 c->auth_suites |= IWINFO_KMGMT_8021x;
981
982 if (val && strstr(val, "NONE"))
983 c->auth_suites |= IWINFO_KMGMT_NONE;
984
985 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
986 {
987 if (strstr(val, "TKIP"))
988 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
989
990 if (strstr(val, "CCMP"))
991 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
992
993 if (strstr(val, "NONE"))
994 c->pair_ciphers |= IWINFO_CIPHER_NONE;
995 }
996
997 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
998 {
999 switch(atoi(val)) {
1000 case 1:
1001 c->auth_algs |= IWINFO_AUTH_OPEN;
1002 break;
1003
1004 case 2:
1005 c->auth_algs |= IWINFO_AUTH_SHARED;
1006 break;
1007
1008 case 3:
1009 c->auth_algs |= IWINFO_AUTH_OPEN;
1010 c->auth_algs |= IWINFO_AUTH_SHARED;
1011 break;
1012
1013 default:
1014 break;
1015 }
1016
1017 for( i = 0; i < 4; i++ )
1018 {
1019 snprintf(k, sizeof(k), "wep_key%d", i);
1020
1021 if ((val = nl80211_getval(ifname, res, k)))
1022 {
1023 if ((strlen(val) == 5) || (strlen(val) == 10))
1024 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1025
1026 else if ((strlen(val) == 13) || (strlen(val) == 26))
1027 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1028 }
1029 }
1030 }
1031
1032 c->group_ciphers = c->pair_ciphers;
1033 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1034
1035 return 0;
1036 }
1037
1038 return -1;
1039 }
1040
1041
1042 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1043 {
1044 struct nl80211_array_buf *arr = arg;
1045 struct iwinfo_assoclist_entry *e = arr->buf;
1046 struct nlattr **attr = nl80211_parse(msg);
1047 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1048
1049 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1050 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1051 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1052 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1053 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1054 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1055 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1056 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1057 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1058 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1059 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1060 };
1061
1062 /* advance to end of array */
1063 e += arr->count;
1064
1065 if (attr[NL80211_ATTR_MAC])
1066 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1067
1068 if (attr[NL80211_ATTR_STA_INFO])
1069 {
1070 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1071 attr[NL80211_ATTR_STA_INFO], stats_policy))
1072 {
1073 if (sinfo[NL80211_STA_INFO_SIGNAL])
1074 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1075 }
1076 }
1077
1078 e->noise = 0; /* filled in by caller */
1079 arr->count++;
1080
1081 return NL_SKIP;
1082 }
1083
1084 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1085 {
1086 DIR *d;
1087 int i, noise = 0;
1088 struct dirent *de;
1089 struct nl80211_msg_conveyor *req;
1090 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1091 struct iwinfo_assoclist_entry *e;
1092
1093 if ((d = opendir("/sys/class/net")) != NULL)
1094 {
1095 while ((de = readdir(d)) != NULL)
1096 {
1097 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1098 (!de->d_name[strlen(ifname)] ||
1099 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1100 {
1101 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1102 NLM_F_DUMP);
1103
1104 if (req)
1105 {
1106 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1107 nl80211_free(req);
1108 }
1109
1110 break;
1111 }
1112 }
1113
1114 closedir(d);
1115
1116 if (!nl80211_get_noise(ifname, &noise))
1117 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1118 e->noise = noise;
1119
1120 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1121 return 0;
1122 }
1123
1124 return -1;
1125 }
1126
1127 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1128 {
1129 int *dbm_max = arg;
1130 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1131
1132 struct nlattr **attr = nl80211_parse(msg);
1133 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1134 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1135 struct nlattr *band, *freq;
1136
1137 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1138 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1139 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1140 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1141 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1142 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1143 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1144 };
1145
1146 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1147 *dbm_max = -1;
1148
1149 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1150 {
1151 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1152 nla_len(band), NULL);
1153
1154 nla_for_each_nested(freq,
1155 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1156 {
1157 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1158 nla_data(freq), nla_len(freq), freq_policy);
1159
1160 ch_cmp = nl80211_freq2channel(
1161 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1162
1163 if( (!ch_cur || (ch_cmp == ch_cur)) &&
1164 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1165 {
1166 *dbm_max = (int)(0.01 * nla_get_u32(
1167 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1168
1169 break;
1170 }
1171 }
1172 }
1173
1174 return NL_SKIP;
1175 }
1176
1177 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1178 {
1179 int ch_cur;
1180 int dbm_max = -1, dbm_cur, dbm_cnt;
1181 struct nl80211_msg_conveyor *req;
1182 struct iwinfo_txpwrlist_entry entry;
1183
1184 if (nl80211_get_channel(ifname, &ch_cur))
1185 ch_cur = 0;
1186
1187 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1188 if (req)
1189 {
1190 /* initialize the value pointer with channel for callback */
1191 dbm_max = ch_cur;
1192
1193 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1194 nl80211_free(req);
1195 }
1196
1197 if (dbm_max > -1)
1198 {
1199 for (dbm_cur = 0, dbm_cnt = 0;
1200 dbm_cur < dbm_max;
1201 dbm_cur++, dbm_cnt++)
1202 {
1203 entry.dbm = dbm_cur;
1204 entry.mw = iwinfo_dbm2mw(dbm_cur);
1205
1206 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1207 }
1208
1209 entry.dbm = dbm_max;
1210 entry.mw = iwinfo_dbm2mw(dbm_max);
1211
1212 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1213 dbm_cnt++;
1214
1215 *len = dbm_cnt * sizeof(entry);
1216 return 0;
1217 }
1218
1219 return -1;
1220 }
1221
1222 static void nl80211_get_scancrypto(const char *spec,
1223 struct iwinfo_crypto_entry *c)
1224 {
1225 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1226 {
1227 c->enabled = 1;
1228
1229 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1230 c->wpa_version = 3;
1231
1232 else if (strstr(spec, "WPA2"))
1233 c->wpa_version = 2;
1234
1235 else if (strstr(spec, "WPA"))
1236 c->wpa_version = 1;
1237
1238 else if (strstr(spec, "WEP"))
1239 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1240
1241
1242 if (strstr(spec, "PSK"))
1243 c->auth_suites |= IWINFO_KMGMT_PSK;
1244
1245 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1246 c->auth_suites |= IWINFO_KMGMT_8021x;
1247
1248 if (strstr(spec, "WPA-NONE"))
1249 c->auth_suites |= IWINFO_KMGMT_NONE;
1250
1251
1252 if (strstr(spec, "TKIP"))
1253 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1254
1255 if (strstr(spec, "CCMP"))
1256 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1257
1258 if (strstr(spec, "WEP-40"))
1259 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1260
1261 if (strstr(spec, "WEP-104"))
1262 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1263
1264 c->group_ciphers = c->pair_ciphers;
1265 }
1266 else
1267 {
1268 c->enabled = 0;
1269 }
1270 }
1271
1272 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1273 {
1274 int freq, rssi, qmax, count;
1275 char *res;
1276 char ssid[128] = { 0 };
1277 char bssid[18] = { 0 };
1278 char cipher[256] = { 0 };
1279
1280 /* Got a radioX pseudo interface, find some interface on it or create one */
1281 if (!strncmp(ifname, "radio", 5))
1282 {
1283 /* Reuse existing interface */
1284 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1285 {
1286 return nl80211_get_scanlist(res, buf, len);
1287 }
1288
1289 /* Need to spawn a temporary iface for scanning */
1290 else if ((res = nl80211_ifadd(ifname)) != NULL)
1291 {
1292 count = nl80211_get_scanlist(res, buf, len);
1293 nl80211_ifdel(res);
1294 return count;
1295 }
1296 }
1297
1298 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1299
1300 /* WPA supplicant */
1301 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1302 {
1303 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1304 {
1305 nl80211_get_quality_max(ifname, &qmax);
1306
1307 /* skip header line */
1308 while( *res++ != '\n' );
1309
1310 count = 0;
1311
1312 while( sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1313 bssid, &freq, &rssi, cipher, ssid) > 0 )
1314 {
1315 /* BSSID */
1316 e->mac[0] = strtol(&bssid[0], NULL, 16);
1317 e->mac[1] = strtol(&bssid[3], NULL, 16);
1318 e->mac[2] = strtol(&bssid[6], NULL, 16);
1319 e->mac[3] = strtol(&bssid[9], NULL, 16);
1320 e->mac[4] = strtol(&bssid[12], NULL, 16);
1321 e->mac[5] = strtol(&bssid[15], NULL, 16);
1322
1323 /* SSID */
1324 memcpy(e->ssid, ssid,
1325 min(strlen(ssid), sizeof(e->ssid) - 1));
1326
1327 /* Mode (assume master) */
1328 sprintf((char *)e->mode, "Master");
1329
1330 /* Channel */
1331 e->channel = nl80211_freq2channel(freq);
1332
1333 /* Signal */
1334 e->signal = rssi;
1335
1336 /* Quality */
1337 if (rssi < 0)
1338 {
1339 /* The cfg80211 wext compat layer assumes a signal range
1340 * of -110 dBm to -40 dBm, the quality value is derived
1341 * by adding 110 to the signal level */
1342 if (rssi < -110)
1343 rssi = -110;
1344 else if (rssi > -40)
1345 rssi = -40;
1346
1347 e->quality = (rssi + 110);
1348 }
1349 else
1350 {
1351 e->quality = rssi;
1352 }
1353
1354 /* Max. Quality */
1355 e->quality_max = qmax;
1356
1357 /* Crypto */
1358 nl80211_get_scancrypto(cipher, &e->crypto);
1359
1360 /* advance to next line */
1361 while( *res && *res++ != '\n' );
1362
1363 count++;
1364 e++;
1365
1366 memset(ssid, 0, sizeof(ssid));
1367 memset(bssid, 0, sizeof(bssid));
1368 memset(cipher, 0, sizeof(cipher));
1369 }
1370
1371 *len = count * sizeof(struct iwinfo_scanlist_entry);
1372 return 0;
1373 }
1374 }
1375
1376 /* AP scan */
1377 else
1378 {
1379 /* Got a temp interface, don't create yet another one */
1380 if (!strncmp(ifname, "tmp.", 4))
1381 {
1382 if (!iwinfo_ifup(ifname))
1383 return -1;
1384
1385 wext_get_scanlist(ifname, buf, len);
1386 iwinfo_ifdown(ifname);
1387 return 0;
1388 }
1389
1390 /* Spawn a new scan interface */
1391 else
1392 {
1393 if (!(res = nl80211_ifadd(ifname)))
1394 goto out;
1395
1396 if (!iwinfo_ifmac(res))
1397 goto out;
1398
1399 /* if we can take the new interface up, the driver supports an
1400 * additional interface and there's no need to tear down the ap */
1401 if (iwinfo_ifup(res))
1402 {
1403 wext_get_scanlist(res, buf, len);
1404 iwinfo_ifdown(res);
1405 }
1406
1407 /* driver cannot create secondary interface, take down ap
1408 * during scan */
1409 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1410 {
1411 wext_get_scanlist(res, buf, len);
1412 iwinfo_ifdown(res);
1413 iwinfo_ifup(ifname);
1414 nl80211_hostapd_hup(ifname);
1415 }
1416
1417 out:
1418 nl80211_ifdel(res);
1419 return 0;
1420 }
1421 }
1422
1423 return -1;
1424 }
1425
1426 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
1427 {
1428 int bands_remain, freqs_remain;
1429
1430 struct nl80211_array_buf *arr = arg;
1431 struct iwinfo_freqlist_entry *e = arr->buf;
1432
1433 struct nlattr **attr = nl80211_parse(msg);
1434 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1435 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1436 struct nlattr *band, *freq;
1437
1438 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1439 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1440 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1441 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1442 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1443 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1444 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1445 };
1446
1447 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1448 {
1449 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1450 nla_len(band), NULL);
1451
1452 nla_for_each_nested(freq,
1453 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1454 {
1455 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1456 nla_data(freq), nla_len(freq), NULL);
1457
1458 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1459 freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1460 continue;
1461
1462 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1463 e->channel = nl80211_freq2channel(e->mhz);
1464
1465 e->restricted = (
1466 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1467 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
1468 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1469 ) ? 1 : 0;
1470
1471 e++;
1472 arr->count++;
1473 }
1474 }
1475
1476 return NL_SKIP;
1477 }
1478
1479 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1480 {
1481 struct nl80211_msg_conveyor *req;
1482 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1483
1484 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1485 if (req)
1486 {
1487 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
1488 nl80211_free(req);
1489 }
1490
1491 if (arr.count > 0)
1492 {
1493 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
1494 return 0;
1495 }
1496
1497 return -1;
1498 }
1499
1500 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
1501 {
1502 char *buf = arg;
1503 struct nlattr **attr = nl80211_parse(msg);
1504
1505 if (attr[NL80211_ATTR_REG_ALPHA2])
1506 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
1507 else
1508 buf[0] = 0;
1509
1510 return NL_SKIP;
1511 }
1512
1513 int nl80211_get_country(const char *ifname, char *buf)
1514 {
1515 int rv = -1;
1516 struct nl80211_msg_conveyor *req;
1517
1518 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1519 if (req)
1520 {
1521 nl80211_send(req, nl80211_get_country_cb, buf);
1522 nl80211_free(req);
1523
1524 if (buf[0])
1525 rv = 0;
1526 }
1527
1528 return rv;
1529 }
1530
1531 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1532 {
1533 int i, count;
1534 struct iwinfo_iso3166_label *l;
1535 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1536
1537 for( l = ISO3166_Names, count = 0; l->iso3166; l++, e++, count++ )
1538 {
1539 e->iso3166 = l->iso3166;
1540 e->ccode[0] = (l->iso3166 / 256);
1541 e->ccode[1] = (l->iso3166 % 256);
1542 }
1543
1544 *len = (count * sizeof(struct iwinfo_country_entry));
1545 return 0;
1546 }
1547
1548 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
1549 {
1550 int *modes = arg;
1551 int bands_remain, freqs_remain;
1552 uint16_t caps = 0;
1553 struct nlattr **attr = nl80211_parse(msg);
1554 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1555 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1556 struct nlattr *band, *freq;
1557
1558 *modes = 0;
1559
1560 if (attr[NL80211_ATTR_WIPHY_BANDS])
1561 {
1562 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1563 {
1564 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1565 nla_len(band), NULL);
1566
1567 if (bands[NL80211_BAND_ATTR_HT_CAPA])
1568 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1569
1570 /* Treat any nonzero capability as 11n */
1571 if (caps > 0)
1572 *modes |= IWINFO_80211_N;
1573
1574 nla_for_each_nested(freq,
1575 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1576 {
1577 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1578 nla_data(freq), nla_len(freq), NULL);
1579
1580 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
1581 continue;
1582
1583 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
1584 {
1585 *modes |= IWINFO_80211_B;
1586 *modes |= IWINFO_80211_G;
1587 }
1588 else
1589 {
1590 *modes |= IWINFO_80211_A;
1591 }
1592 }
1593 }
1594 }
1595
1596 return NL_SKIP;
1597 }
1598
1599 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1600 {
1601 struct nl80211_msg_conveyor *req;
1602
1603 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1604 if (req)
1605 {
1606 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
1607 nl80211_free(req);
1608 }
1609
1610 return *buf ? 0 : -1;
1611 }
1612
1613 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1614 {
1615 /* Test whether we can create another interface */
1616 char *nif = nl80211_ifadd(ifname);
1617
1618 if (nif)
1619 {
1620 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
1621
1622 iwinfo_ifdown(nif);
1623 nl80211_ifdel(nif);
1624
1625 return 0;
1626 }
1627
1628 return -1;
1629 }
Lua Configuration Interface (mirror)