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[openwrt.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->nl_sock)
563 nl_socket_free(nls->nl_sock);
564
565 if (nls->nl_cache)
566 nl_cache_free(nls->nl_cache);
567
568 free(nls);
569 nls = NULL;
570 }
571 }
572
573 int nl80211_get_mode(const char *ifname, char *buf)
574 {
575 return wext_get_mode(ifname, buf);
576 }
577
578 int nl80211_get_ssid(const char *ifname, char *buf)
579 {
580 char *ssid;
581
582 if (!wext_get_ssid(ifname, buf))
583 {
584 return 0;
585 }
586 else if( (ssid = nl80211_hostapd_info(ifname)) &&
587 (ssid = nl80211_getval(ifname, ssid, "ssid")) )
588 {
589 memcpy(buf, ssid, strlen(ssid));
590 return 0;
591 }
592
593 return -1;
594 }
595
596 int nl80211_get_bssid(const char *ifname, char *buf)
597 {
598 char *bssid;
599 unsigned char mac[6];
600
601 if (!wext_get_bssid(ifname, buf))
602 {
603 return 0;
604 }
605 else if((bssid = nl80211_hostapd_info(ifname)) &&
606 (bssid = nl80211_getval(ifname, bssid, "bssid")))
607 {
608 mac[0] = strtol(&bssid[0], NULL, 16);
609 mac[1] = strtol(&bssid[3], NULL, 16);
610 mac[2] = strtol(&bssid[6], NULL, 16);
611 mac[3] = strtol(&bssid[9], NULL, 16);
612 mac[4] = strtol(&bssid[12], NULL, 16);
613 mac[5] = strtol(&bssid[15], NULL, 16);
614
615 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
616 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
617
618 return 0;
619 }
620
621 return -1;
622 }
623
624 int nl80211_get_channel(const char *ifname, int *buf)
625 {
626 char *first;
627
628 if (!wext_get_channel(ifname, buf))
629 return 0;
630
631 else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
632 return wext_get_channel(first, buf);
633
634 return -1;
635 }
636
637 int nl80211_get_frequency(const char *ifname, int *buf)
638 {
639 char *first;
640
641 if (!wext_get_frequency(ifname, buf))
642 return 0;
643
644 else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
645 return wext_get_frequency(first, buf);
646
647 return -1;
648 }
649
650 int nl80211_get_txpower(const char *ifname, int *buf)
651 {
652 return wext_get_txpower(ifname, buf);
653 }
654
655
656 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
657 {
658 int8_t dbm;
659 int16_t mbit;
660 struct nl80211_rssi_rate *rr = arg;
661 struct nlattr **attr = nl80211_parse(msg);
662 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
663 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
664
665 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
666 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
667 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
668 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
669 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
670 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
671 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
672 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
673 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
674 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
675 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
676 };
677
678 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
679 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
680 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
681 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
682 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
683 };
684
685 if (attr[NL80211_ATTR_STA_INFO])
686 {
687 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
688 attr[NL80211_ATTR_STA_INFO], stats_policy) )
689 {
690 if (sinfo[NL80211_STA_INFO_SIGNAL])
691 {
692 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
693 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
694 }
695
696 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
697 {
698 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
699 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
700 {
701 if (rinfo[NL80211_RATE_INFO_BITRATE])
702 {
703 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
704 rr->rate = rr->rate
705 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
706 }
707 }
708 }
709 }
710 }
711
712 return NL_SKIP;
713 }
714
715 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
716 {
717 DIR *d;
718 struct dirent *de;
719 struct nl80211_msg_conveyor *req;
720
721 r->rssi = 0;
722 r->rate = 0;
723
724 if ((d = opendir("/sys/class/net")) != NULL)
725 {
726 while ((de = readdir(d)) != NULL)
727 {
728 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
729 (!de->d_name[strlen(ifname)] ||
730 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
731 {
732 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
733 NLM_F_DUMP);
734
735 if (req)
736 {
737 nl80211_send(req, nl80211_fill_signal_cb, r);
738 nl80211_free(req);
739 }
740 }
741 }
742
743 closedir(d);
744 }
745 }
746
747 int nl80211_get_bitrate(const char *ifname, int *buf)
748 {
749 struct nl80211_rssi_rate rr;
750
751 if (!wext_get_bitrate(ifname, buf))
752 return 0;
753
754 nl80211_fill_signal(ifname, &rr);
755
756 if (rr.rate)
757 {
758 *buf = (rr.rate * 100);
759 return 0;
760 }
761
762 return -1;
763 }
764
765 int nl80211_get_signal(const char *ifname, int *buf)
766 {
767 struct nl80211_rssi_rate rr;
768
769 if (!wext_get_signal(ifname, buf))
770 return 0;
771
772 nl80211_fill_signal(ifname, &rr);
773
774 if (rr.rssi)
775 {
776 *buf = rr.rssi;
777 return 0;
778 }
779
780 return -1;
781 }
782
783 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
784 {
785 int8_t *noise = arg;
786 struct nlattr **tb = nl80211_parse(msg);
787 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
788
789 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
790 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
791 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
792 };
793
794 if (!tb[NL80211_ATTR_SURVEY_INFO])
795 return NL_SKIP;
796
797 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
798 tb[NL80211_ATTR_SURVEY_INFO], sp))
799 return NL_SKIP;
800
801 if (!si[NL80211_SURVEY_INFO_NOISE])
802 return NL_SKIP;
803
804 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
805 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
806
807 return NL_SKIP;
808 }
809
810
811 int nl80211_get_noise(const char *ifname, int *buf)
812 {
813 int8_t noise;
814 struct nl80211_msg_conveyor *req;
815
816 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
817 if (req)
818 {
819 noise = 0;
820
821 nl80211_send(req, nl80211_get_noise_cb, &noise);
822 nl80211_free(req);
823
824 if (noise)
825 {
826 *buf = noise;
827 return 0;
828 }
829 }
830
831 return -1;
832 }
833
834 int nl80211_get_quality(const char *ifname, int *buf)
835 {
836 int signal;
837
838 if (wext_get_quality(ifname, buf))
839 {
840 *buf = 0;
841
842 if (!nl80211_get_signal(ifname, &signal))
843 {
844 /* A positive signal level is usually just a quality
845 * value, pass through as-is */
846 if (signal >= 0)
847 {
848 *buf = signal;
849 }
850
851 /* The cfg80211 wext compat layer assumes a signal range
852 * of -110 dBm to -40 dBm, the quality value is derived
853 * by adding 110 to the signal level */
854 else
855 {
856 if (signal < -110)
857 signal = -110;
858 else if (signal > -40)
859 signal = -40;
860
861 *buf = (signal + 110);
862 }
863 }
864 }
865
866 return 0;
867 }
868
869 int nl80211_get_quality_max(const char *ifname, int *buf)
870 {
871 if (wext_get_quality_max(ifname, buf))
872 /* The cfg80211 wext compat layer assumes a maximum
873 * quality of 70 */
874 *buf = 70;
875
876 return 0;
877 }
878
879 int nl80211_get_encryption(const char *ifname, char *buf)
880 {
881 int i;
882 char k[9];
883 char *val, *res;
884 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
885
886 /* WPA supplicant */
887 if( (res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
888 (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
889 {
890 /* WEP */
891 if (strstr(val, "WEP"))
892 {
893 if (strstr(val, "WEP-40"))
894 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
895
896 else if (strstr(val, "WEP-104"))
897 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
898
899 c->enabled = 1;
900 c->group_ciphers = c->pair_ciphers;
901
902 c->auth_suites |= IWINFO_KMGMT_NONE;
903 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
904 }
905
906 /* WPA */
907 else
908 {
909 if (strstr(val, "TKIP"))
910 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
911
912 else if (strstr(val, "CCMP"))
913 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
914
915 else if (strstr(val, "NONE"))
916 c->pair_ciphers |= IWINFO_CIPHER_NONE;
917
918 else if (strstr(val, "WEP-40"))
919 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
920
921 else if (strstr(val, "WEP-104"))
922 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
923
924
925 if ((val = nl80211_getval(NULL, res, "group_cipher")))
926 {
927 if (strstr(val, "TKIP"))
928 c->group_ciphers |= IWINFO_CIPHER_TKIP;
929
930 else if (strstr(val, "CCMP"))
931 c->group_ciphers |= IWINFO_CIPHER_CCMP;
932
933 else if (strstr(val, "NONE"))
934 c->group_ciphers |= IWINFO_CIPHER_NONE;
935
936 else if (strstr(val, "WEP-40"))
937 c->group_ciphers |= IWINFO_CIPHER_WEP40;
938
939 else if (strstr(val, "WEP-104"))
940 c->group_ciphers |= IWINFO_CIPHER_WEP104;
941 }
942
943
944 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
945 {
946 if (strstr(val, "WPA2"))
947 c->wpa_version = 2;
948
949 else if (strstr(val, "WPA"))
950 c->wpa_version = 1;
951
952
953 if (strstr(val, "PSK"))
954 c->auth_suites |= IWINFO_KMGMT_PSK;
955
956 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
957 c->auth_suites |= IWINFO_KMGMT_8021x;
958
959 else if (strstr(val, "NONE"))
960 c->auth_suites |= IWINFO_KMGMT_NONE;
961 }
962
963 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
964 }
965
966 return 0;
967 }
968
969 /* Hostapd */
970 else if ((res = nl80211_hostapd_info(ifname)))
971 {
972 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
973 c->wpa_version = atoi(val);
974
975 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
976
977 if (!val || strstr(val, "PSK"))
978 c->auth_suites |= IWINFO_KMGMT_PSK;
979
980 if (val && strstr(val, "EAP"))
981 c->auth_suites |= IWINFO_KMGMT_8021x;
982
983 if (val && strstr(val, "NONE"))
984 c->auth_suites |= IWINFO_KMGMT_NONE;
985
986 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
987 {
988 if (strstr(val, "TKIP"))
989 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
990
991 if (strstr(val, "CCMP"))
992 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
993
994 if (strstr(val, "NONE"))
995 c->pair_ciphers |= IWINFO_CIPHER_NONE;
996 }
997
998 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
999 {
1000 switch(atoi(val)) {
1001 case 1:
1002 c->auth_algs |= IWINFO_AUTH_OPEN;
1003 break;
1004
1005 case 2:
1006 c->auth_algs |= IWINFO_AUTH_SHARED;
1007 break;
1008
1009 case 3:
1010 c->auth_algs |= IWINFO_AUTH_OPEN;
1011 c->auth_algs |= IWINFO_AUTH_SHARED;
1012 break;
1013
1014 default:
1015 break;
1016 }
1017
1018 for( i = 0; i < 4; i++ )
1019 {
1020 snprintf(k, sizeof(k), "wep_key%d", i);
1021
1022 if ((val = nl80211_getval(ifname, res, k)))
1023 {
1024 if ((strlen(val) == 5) || (strlen(val) == 10))
1025 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1026
1027 else if ((strlen(val) == 13) || (strlen(val) == 26))
1028 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1029 }
1030 }
1031 }
1032
1033 c->group_ciphers = c->pair_ciphers;
1034 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1035
1036 return 0;
1037 }
1038
1039 return -1;
1040 }
1041
1042
1043 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1044 {
1045 struct nl80211_array_buf *arr = arg;
1046 struct iwinfo_assoclist_entry *e = arr->buf;
1047 struct nlattr **attr = nl80211_parse(msg);
1048 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1049
1050 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1051 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1052 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1053 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1054 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1055 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1056 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1057 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1058 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1059 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1060 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1061 };
1062
1063 /* advance to end of array */
1064 e += arr->count;
1065
1066 if (attr[NL80211_ATTR_MAC])
1067 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1068
1069 if (attr[NL80211_ATTR_STA_INFO])
1070 {
1071 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1072 attr[NL80211_ATTR_STA_INFO], stats_policy))
1073 {
1074 if (sinfo[NL80211_STA_INFO_SIGNAL])
1075 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1076 }
1077 }
1078
1079 e->noise = 0; /* filled in by caller */
1080 arr->count++;
1081
1082 return NL_SKIP;
1083 }
1084
1085 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1086 {
1087 DIR *d;
1088 int i, noise = 0;
1089 struct dirent *de;
1090 struct nl80211_msg_conveyor *req;
1091 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1092 struct iwinfo_assoclist_entry *e;
1093
1094 if ((d = opendir("/sys/class/net")) != NULL)
1095 {
1096 while ((de = readdir(d)) != NULL)
1097 {
1098 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1099 (!de->d_name[strlen(ifname)] ||
1100 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1101 {
1102 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1103 NLM_F_DUMP);
1104
1105 if (req)
1106 {
1107 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1108 nl80211_free(req);
1109 }
1110
1111 break;
1112 }
1113 }
1114
1115 closedir(d);
1116
1117 if (!nl80211_get_noise(ifname, &noise))
1118 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1119 e->noise = noise;
1120
1121 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1122 return 0;
1123 }
1124
1125 return -1;
1126 }
1127
1128 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1129 {
1130 int *dbm_max = arg;
1131 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1132
1133 struct nlattr **attr = nl80211_parse(msg);
1134 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1135 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1136 struct nlattr *band, *freq;
1137
1138 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1139 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1140 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1141 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1142 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1143 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1144 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1145 };
1146
1147 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1148 *dbm_max = -1;
1149
1150 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1151 {
1152 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1153 nla_len(band), NULL);
1154
1155 nla_for_each_nested(freq,
1156 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1157 {
1158 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1159 nla_data(freq), nla_len(freq), freq_policy);
1160
1161 ch_cmp = nl80211_freq2channel(
1162 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1163
1164 if( (!ch_cur || (ch_cmp == ch_cur)) &&
1165 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1166 {
1167 *dbm_max = (int)(0.01 * nla_get_u32(
1168 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1169
1170 break;
1171 }
1172 }
1173 }
1174
1175 return NL_SKIP;
1176 }
1177
1178 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1179 {
1180 int ch_cur;
1181 int dbm_max = -1, dbm_cur, dbm_cnt;
1182 struct nl80211_msg_conveyor *req;
1183 struct iwinfo_txpwrlist_entry entry;
1184
1185 if (nl80211_get_channel(ifname, &ch_cur))
1186 ch_cur = 0;
1187
1188 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1189 if (req)
1190 {
1191 /* initialize the value pointer with channel for callback */
1192 dbm_max = ch_cur;
1193
1194 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1195 nl80211_free(req);
1196 }
1197
1198 if (dbm_max > -1)
1199 {
1200 for (dbm_cur = 0, dbm_cnt = 0;
1201 dbm_cur < dbm_max;
1202 dbm_cur++, dbm_cnt++)
1203 {
1204 entry.dbm = dbm_cur;
1205 entry.mw = iwinfo_dbm2mw(dbm_cur);
1206
1207 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1208 }
1209
1210 entry.dbm = dbm_max;
1211 entry.mw = iwinfo_dbm2mw(dbm_max);
1212
1213 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1214 dbm_cnt++;
1215
1216 *len = dbm_cnt * sizeof(entry);
1217 return 0;
1218 }
1219
1220 return -1;
1221 }
1222
1223 static void nl80211_get_scancrypto(const char *spec,
1224 struct iwinfo_crypto_entry *c)
1225 {
1226 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1227 {
1228 c->enabled = 1;
1229
1230 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1231 c->wpa_version = 3;
1232
1233 else if (strstr(spec, "WPA2"))
1234 c->wpa_version = 2;
1235
1236 else if (strstr(spec, "WPA"))
1237 c->wpa_version = 1;
1238
1239 else if (strstr(spec, "WEP"))
1240 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1241
1242
1243 if (strstr(spec, "PSK"))
1244 c->auth_suites |= IWINFO_KMGMT_PSK;
1245
1246 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1247 c->auth_suites |= IWINFO_KMGMT_8021x;
1248
1249 if (strstr(spec, "WPA-NONE"))
1250 c->auth_suites |= IWINFO_KMGMT_NONE;
1251
1252
1253 if (strstr(spec, "TKIP"))
1254 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1255
1256 if (strstr(spec, "CCMP"))
1257 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1258
1259 if (strstr(spec, "WEP-40"))
1260 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1261
1262 if (strstr(spec, "WEP-104"))
1263 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1264
1265 c->group_ciphers = c->pair_ciphers;
1266 }
1267 else
1268 {
1269 c->enabled = 0;
1270 }
1271 }
1272
1273 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1274 {
1275 int freq, rssi, qmax, count;
1276 char *res;
1277 char ssid[128] = { 0 };
1278 char bssid[18] = { 0 };
1279 char cipher[256] = { 0 };
1280
1281 /* Got a radioX pseudo interface, find some interface on it or create one */
1282 if (!strncmp(ifname, "radio", 5))
1283 {
1284 /* Reuse existing interface */
1285 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1286 {
1287 return nl80211_get_scanlist(res, buf, len);
1288 }
1289
1290 /* Need to spawn a temporary iface for scanning */
1291 else if ((res = nl80211_ifadd(ifname)) != NULL)
1292 {
1293 count = nl80211_get_scanlist(res, buf, len);
1294 nl80211_ifdel(res);
1295 return count;
1296 }
1297 }
1298
1299 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1300
1301 /* WPA supplicant */
1302 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1303 {
1304 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1305 {
1306 nl80211_get_quality_max(ifname, &qmax);
1307
1308 /* skip header line */
1309 while( *res++ != '\n' );
1310
1311 count = 0;
1312
1313 while( sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1314 bssid, &freq, &rssi, cipher, ssid) > 0 )
1315 {
1316 /* BSSID */
1317 e->mac[0] = strtol(&bssid[0], NULL, 16);
1318 e->mac[1] = strtol(&bssid[3], NULL, 16);
1319 e->mac[2] = strtol(&bssid[6], NULL, 16);
1320 e->mac[3] = strtol(&bssid[9], NULL, 16);
1321 e->mac[4] = strtol(&bssid[12], NULL, 16);
1322 e->mac[5] = strtol(&bssid[15], NULL, 16);
1323
1324 /* SSID */
1325 memcpy(e->ssid, ssid,
1326 min(strlen(ssid), sizeof(e->ssid) - 1));
1327
1328 /* Mode (assume master) */
1329 sprintf((char *)e->mode, "Master");
1330
1331 /* Channel */
1332 e->channel = nl80211_freq2channel(freq);
1333
1334 /* Signal */
1335 e->signal = rssi;
1336
1337 /* Quality */
1338 if (rssi < 0)
1339 {
1340 /* The cfg80211 wext compat layer assumes a signal range
1341 * of -110 dBm to -40 dBm, the quality value is derived
1342 * by adding 110 to the signal level */
1343 if (rssi < -110)
1344 rssi = -110;
1345 else if (rssi > -40)
1346 rssi = -40;
1347
1348 e->quality = (rssi + 110);
1349 }
1350 else
1351 {
1352 e->quality = rssi;
1353 }
1354
1355 /* Max. Quality */
1356 e->quality_max = qmax;
1357
1358 /* Crypto */
1359 nl80211_get_scancrypto(cipher, &e->crypto);
1360
1361 /* advance to next line */
1362 while( *res && *res++ != '\n' );
1363
1364 count++;
1365 e++;
1366
1367 memset(ssid, 0, sizeof(ssid));
1368 memset(bssid, 0, sizeof(bssid));
1369 memset(cipher, 0, sizeof(cipher));
1370 }
1371
1372 *len = count * sizeof(struct iwinfo_scanlist_entry);
1373 return 0;
1374 }
1375 }
1376
1377 /* AP scan */
1378 else
1379 {
1380 /* Got a temp interface, don't create yet another one */
1381 if (!strncmp(ifname, "tmp.", 4))
1382 {
1383 if (!iwinfo_ifup(ifname))
1384 return -1;
1385
1386 wext_get_scanlist(ifname, buf, len);
1387 iwinfo_ifdown(ifname);
1388 return 0;
1389 }
1390
1391 /* Spawn a new scan interface */
1392 else
1393 {
1394 if (!(res = nl80211_ifadd(ifname)))
1395 goto out;
1396
1397 if (!iwinfo_ifmac(res))
1398 goto out;
1399
1400 /* if we can take the new interface up, the driver supports an
1401 * additional interface and there's no need to tear down the ap */
1402 if (iwinfo_ifup(res))
1403 {
1404 wext_get_scanlist(res, buf, len);
1405 iwinfo_ifdown(res);
1406 }
1407
1408 /* driver cannot create secondary interface, take down ap
1409 * during scan */
1410 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1411 {
1412 wext_get_scanlist(res, buf, len);
1413 iwinfo_ifdown(res);
1414 iwinfo_ifup(ifname);
1415 nl80211_hostapd_hup(ifname);
1416 }
1417
1418 out:
1419 nl80211_ifdel(res);
1420 return 0;
1421 }
1422 }
1423
1424 return -1;
1425 }
1426
1427 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
1428 {
1429 int bands_remain, freqs_remain;
1430
1431 struct nl80211_array_buf *arr = arg;
1432 struct iwinfo_freqlist_entry *e = arr->buf;
1433
1434 struct nlattr **attr = nl80211_parse(msg);
1435 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1436 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1437 struct nlattr *band, *freq;
1438
1439 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1440 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1441 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1442 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1443 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1444 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1445 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1446 };
1447
1448 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1449 {
1450 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1451 nla_len(band), NULL);
1452
1453 nla_for_each_nested(freq,
1454 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1455 {
1456 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1457 nla_data(freq), nla_len(freq), NULL);
1458
1459 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1460 freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1461 continue;
1462
1463 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1464 e->channel = nl80211_freq2channel(e->mhz);
1465
1466 e->restricted = (
1467 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1468 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
1469 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1470 ) ? 1 : 0;
1471
1472 e++;
1473 arr->count++;
1474 }
1475 }
1476
1477 return NL_SKIP;
1478 }
1479
1480 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1481 {
1482 struct nl80211_msg_conveyor *req;
1483 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1484
1485 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1486 if (req)
1487 {
1488 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
1489 nl80211_free(req);
1490 }
1491
1492 if (arr.count > 0)
1493 {
1494 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
1495 return 0;
1496 }
1497
1498 return -1;
1499 }
1500
1501 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
1502 {
1503 char *buf = arg;
1504 struct nlattr **attr = nl80211_parse(msg);
1505
1506 if (attr[NL80211_ATTR_REG_ALPHA2])
1507 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
1508 else
1509 buf[0] = 0;
1510
1511 return NL_SKIP;
1512 }
1513
1514 int nl80211_get_country(const char *ifname, char *buf)
1515 {
1516 int rv = -1;
1517 struct nl80211_msg_conveyor *req;
1518
1519 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1520 if (req)
1521 {
1522 nl80211_send(req, nl80211_get_country_cb, buf);
1523 nl80211_free(req);
1524
1525 if (buf[0])
1526 rv = 0;
1527 }
1528
1529 return rv;
1530 }
1531
1532 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1533 {
1534 int i, count;
1535 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1536 const struct iwinfo_iso3166_label *l;
1537
1538 for( l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++ )
1539 {
1540 e->iso3166 = l->iso3166;
1541 e->ccode[0] = (l->iso3166 / 256);
1542 e->ccode[1] = (l->iso3166 % 256);
1543 }
1544
1545 *len = (count * sizeof(struct iwinfo_country_entry));
1546 return 0;
1547 }
1548
1549 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
1550 {
1551 int *modes = arg;
1552 int bands_remain, freqs_remain;
1553 uint16_t caps = 0;
1554 struct nlattr **attr = nl80211_parse(msg);
1555 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1556 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1557 struct nlattr *band, *freq;
1558
1559 *modes = 0;
1560
1561 if (attr[NL80211_ATTR_WIPHY_BANDS])
1562 {
1563 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1564 {
1565 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1566 nla_len(band), NULL);
1567
1568 if (bands[NL80211_BAND_ATTR_HT_CAPA])
1569 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1570
1571 /* Treat any nonzero capability as 11n */
1572 if (caps > 0)
1573 *modes |= IWINFO_80211_N;
1574
1575 nla_for_each_nested(freq,
1576 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1577 {
1578 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1579 nla_data(freq), nla_len(freq), NULL);
1580
1581 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
1582 continue;
1583
1584 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
1585 {
1586 *modes |= IWINFO_80211_B;
1587 *modes |= IWINFO_80211_G;
1588 }
1589 else
1590 {
1591 *modes |= IWINFO_80211_A;
1592 }
1593 }
1594 }
1595 }
1596
1597 return NL_SKIP;
1598 }
1599
1600 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1601 {
1602 struct nl80211_msg_conveyor *req;
1603
1604 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1605 if (req)
1606 {
1607 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
1608 nl80211_free(req);
1609 }
1610
1611 return *buf ? 0 : -1;
1612 }
1613
1614 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1615 {
1616 /* Test whether we can create another interface */
1617 char *nif = nl80211_ifadd(ifname);
1618
1619 if (nif)
1620 {
1621 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
1622
1623 iwinfo_ifdown(nif);
1624 nl80211_ifdel(nif);
1625
1626 return 0;
1627 }
1628
1629 return -1;
1630 }
1631
1632 int nl80211_get_hardware_id(const char *ifname, char *buf)
1633 {
1634 int rv;
1635 char *res;
1636
1637 /* Got a radioX pseudo interface, find some interface on it or create one */
1638 if (!strncmp(ifname, "radio", 5))
1639 {
1640 /* Reuse existing interface */
1641 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1642 {
1643 return wext_get_hardware_id(res, buf);
1644 }
1645
1646 /* Need to spawn a temporary iface for finding IDs */
1647 else if ((res = nl80211_ifadd(ifname)) != NULL)
1648 {
1649 rv = wext_get_hardware_id(res, buf);
1650 nl80211_ifdel(res);
1651 return rv;
1652 }
1653 }
1654
1655 return wext_get_hardware_id(ifname, buf);
1656 }
1657
1658 static const struct iwinfo_hardware_entry *
1659 nl80211_get_hardware_entry(const char *ifname)
1660 {
1661 struct iwinfo_hardware_id id;
1662
1663 if (nl80211_get_hardware_id(ifname, (char *)&id))
1664 return NULL;
1665
1666 return iwinfo_hardware(&id);
1667 }
1668
1669 int nl80211_get_hardware_name(const char *ifname, char *buf)
1670 {
1671 const struct iwinfo_hardware_entry *hw;
1672
1673 if (!(hw = nl80211_get_hardware_entry(ifname)))
1674 sprintf(buf, "Generic MAC80211");
1675 else
1676 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
1677
1678 return 0;
1679 }
1680
1681 int nl80211_get_txpower_offset(const char *ifname, int *buf)
1682 {
1683 const struct iwinfo_hardware_entry *hw;
1684
1685 if (!(hw = nl80211_get_hardware_entry(ifname)))
1686 return -1;
1687
1688 *buf = hw->txpower_offset;
1689 return 0;
1690 }
1691
1692 int nl80211_get_frequency_offset(const char *ifname, int *buf)
1693 {
1694 const struct iwinfo_hardware_entry *hw;
1695
1696 if (!(hw = nl80211_get_hardware_entry(ifname)))
1697 return -1;
1698
1699 *buf = hw->frequency_offset;
1700 return 0;
1701 }
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