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iwinfo: fix frequency/channel and channel/frequency conversions to properly implement...
[openwrt/openwrt.git] / package / network / utils / iwinfo / src / iwinfo_nl80211.c
1 /*
2 * iwinfo - Wireless Information Library - NL80211 Backend
3 *
4 * Copyright (C) 2010-2013 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 memset(nls, 0, sizeof(*nls));
45
46 nls->nl_sock = nl_socket_alloc();
47 if (!nls->nl_sock) {
48 err = -ENOMEM;
49 goto err;
50 }
51
52 if (genl_connect(nls->nl_sock)) {
53 err = -ENOLINK;
54 goto err;
55 }
56
57 fd = nl_socket_get_fd(nls->nl_sock);
58 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
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 err = -ENOENT;
71 goto err;
72 }
73
74 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
75 if (!nls->nlctrl) {
76 err = -ENOENT;
77 goto err;
78 }
79 }
80
81 return 0;
82
83
84 err:
85 nl80211_close();
86 return err;
87 }
88
89
90 static int nl80211_msg_error(struct sockaddr_nl *nla,
91 struct nlmsgerr *err, void *arg)
92 {
93 int *ret = arg;
94 *ret = err->error;
95 return NL_STOP;
96 }
97
98 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
99 {
100 int *ret = arg;
101 *ret = 0;
102 return NL_SKIP;
103 }
104
105 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
106 {
107 int *ret = arg;
108 *ret = 0;
109 return NL_STOP;
110 }
111
112 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
113 {
114 return NL_SKIP;
115 }
116
117 static void nl80211_free(struct nl80211_msg_conveyor *cv)
118 {
119 if (cv)
120 {
121 if (cv->cb)
122 nl_cb_put(cv->cb);
123
124 if (cv->msg)
125 nlmsg_free(cv->msg);
126
127 cv->cb = NULL;
128 cv->msg = NULL;
129 }
130 }
131
132 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
133 int cmd, int flags)
134 {
135 static struct nl80211_msg_conveyor cv;
136
137 struct nl_msg *req = NULL;
138 struct nl_cb *cb = NULL;
139
140 req = nlmsg_alloc();
141 if (!req)
142 goto err;
143
144 cb = nl_cb_alloc(NL_CB_DEFAULT);
145 if (!cb)
146 goto err;
147
148 genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
149
150 cv.msg = req;
151 cv.cb = cb;
152
153 return &cv;
154
155 err:
156 nla_put_failure:
157 if (cb)
158 nl_cb_put(cb);
159
160 if (req)
161 nlmsg_free(req);
162
163 return NULL;
164 }
165
166 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
167 {
168 if (nl80211_init() < 0)
169 return NULL;
170
171 return nl80211_new(nls->nlctrl, cmd, flags);
172 }
173
174 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
175 int cmd, int flags)
176 {
177 int ifidx = -1, phyidx = -1;
178 struct nl80211_msg_conveyor *cv;
179
180 if (nl80211_init() < 0)
181 return NULL;
182
183 if (!strncmp(ifname, "phy", 3))
184 phyidx = atoi(&ifname[3]);
185 else if (!strncmp(ifname, "radio", 5))
186 phyidx = atoi(&ifname[5]);
187 else if (!strncmp(ifname, "mon.", 4))
188 ifidx = if_nametoindex(&ifname[4]);
189 else
190 ifidx = if_nametoindex(ifname);
191
192 if ((ifidx < 0) && (phyidx < 0))
193 return NULL;
194
195 cv = nl80211_new(nls->nl80211, cmd, flags);
196 if (!cv)
197 return NULL;
198
199 if (ifidx > -1)
200 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
201
202 if (phyidx > -1)
203 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
204
205 return cv;
206
207 nla_put_failure:
208 nl80211_free(cv);
209 return NULL;
210 }
211
212 static struct nl80211_msg_conveyor * nl80211_send(
213 struct nl80211_msg_conveyor *cv,
214 int (*cb_func)(struct nl_msg *, void *), void *cb_arg
215 ) {
216 static struct nl80211_msg_conveyor rcv;
217 int err = 1;
218
219 if (cb_func)
220 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
221 else
222 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
223
224 if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
225 goto err;
226
227 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
228 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
229 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
230
231 while (err > 0)
232 nl_recvmsgs(nls->nl_sock, cv->cb);
233
234 return &rcv;
235
236 err:
237 nl_cb_put(cv->cb);
238 nlmsg_free(cv->msg);
239
240 return NULL;
241 }
242
243 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
244 {
245 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
246 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
247
248 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
249 genlmsg_attrlen(gnlh, 0), NULL);
250
251 return attr;
252 }
253
254
255 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
256 {
257 struct nl80211_group_conveyor *cv = arg;
258
259 struct nlattr **attr = nl80211_parse(msg);
260 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
261 struct nlattr *mgrp;
262 int mgrpidx;
263
264 if (!attr[CTRL_ATTR_MCAST_GROUPS])
265 return NL_SKIP;
266
267 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
268 {
269 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
270 nla_data(mgrp), nla_len(mgrp), NULL);
271
272 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
273 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
274 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
275 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
276 {
277 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
278 break;
279 }
280 }
281
282 return NL_SKIP;
283 }
284
285 static int nl80211_subscribe(const char *family, const char *group)
286 {
287 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
288 struct nl80211_msg_conveyor *req;
289
290 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
291 if (req)
292 {
293 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
294 nl80211_send(req, nl80211_subscribe_cb, &cv);
295
296 nla_put_failure:
297 nl80211_free(req);
298 }
299
300 return nl_socket_add_membership(nls->nl_sock, cv.id);
301 }
302
303
304 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
305 {
306 struct nl80211_event_conveyor *cv = arg;
307 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
308
309 if (gnlh->cmd == cv->wait)
310 cv->recv = gnlh->cmd;
311
312 return NL_SKIP;
313 }
314
315 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
316 {
317 return NL_OK;
318 }
319
320 static int nl80211_wait(const char *family, const char *group, int cmd)
321 {
322 struct nl80211_event_conveyor cv = { .wait = cmd };
323 struct nl_cb *cb;
324
325 if (nl80211_subscribe(family, group))
326 return -ENOENT;
327
328 cb = nl_cb_alloc(NL_CB_DEFAULT);
329
330 if (!cb)
331 return -ENOMEM;
332
333 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
334 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
335
336 while (!cv.recv)
337 nl_recvmsgs(nls->nl_sock, cb);
338
339 nl_cb_put(cb);
340
341 return 0;
342 }
343
344
345 static int nl80211_freq2channel(int freq)
346 {
347 if (freq == 2484)
348 return 14;
349 else if (freq < 2484)
350 return (freq - 2407) / 5;
351 else if (freq >= 4910 && freq <= 4980)
352 return (freq - 4000) / 5;
353 else
354 return (freq - 5000) / 5;
355 }
356
357 static int nl80211_channel2freq(int channel, const char *band)
358 {
359 if (!band || band[0] != 'a')
360 {
361 if (channel == 14)
362 return 2484;
363 else if (channel < 14)
364 return (channel * 5) + 2407;
365 }
366 else
367 {
368 if (channel >= 182 && channel <= 196)
369 return (channel * 5) + 4000;
370 else
371 return (channel * 5) + 5000;
372 }
373
374 return 0;
375 }
376
377 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
378 {
379 int i, len;
380 char lkey[64] = { 0 };
381 const char *ln = buf;
382 static char lval[256] = { 0 };
383
384 int matched_if = ifname ? 0 : 1;
385
386
387 for( i = 0, len = strlen(buf); i < len; i++ )
388 {
389 if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
390 {
391 ln++;
392 }
393 else if (!lkey[0] && (buf[i] == '='))
394 {
395 if ((&buf[i] - ln) > 0)
396 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
397 }
398 else if (buf[i] == '\n')
399 {
400 if (lkey[0])
401 {
402 memcpy(lval, ln + strlen(lkey) + 1,
403 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
404
405 if ((ifname != NULL) &&
406 (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
407 {
408 matched_if = !strcmp(lval, ifname);
409 }
410 else if (matched_if && !strcmp(lkey, key))
411 {
412 return lval;
413 }
414 }
415
416 ln = &buf[i+1];
417 memset(lkey, 0, sizeof(lkey));
418 memset(lval, 0, sizeof(lval));
419 }
420 }
421
422 return NULL;
423 }
424
425 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
426 {
427 char *buf = arg;
428 struct nlattr **attr = nl80211_parse(msg);
429
430 if (attr[NL80211_ATTR_WIPHY_NAME])
431 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
432 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
433 else
434 buf[0] = 0;
435
436 return NL_SKIP;
437 }
438
439 static char * nl80211_ifname2phy(const char *ifname)
440 {
441 static char phy[32] = { 0 };
442 struct nl80211_msg_conveyor *req;
443
444 memset(phy, 0, sizeof(phy));
445
446 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
447 if (req)
448 {
449 nl80211_send(req, nl80211_ifname2phy_cb, phy);
450 nl80211_free(req);
451 }
452
453 return phy[0] ? phy : NULL;
454 }
455
456 static char * nl80211_hostapd_info(const char *ifname)
457 {
458 int mode;
459 char *phy;
460 char path[32] = { 0 };
461 static char buf[4096] = { 0 };
462 FILE *conf;
463
464 if (nl80211_get_mode(ifname, &mode))
465 return NULL;
466
467 if ((mode == IWINFO_OPMODE_MASTER || mode == IWINFO_OPMODE_AP_VLAN) &&
468 (phy = nl80211_ifname2phy(ifname)) != NULL)
469 {
470 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
471
472 if ((conf = fopen(path, "r")) != NULL)
473 {
474 fread(buf, sizeof(buf) - 1, 1, conf);
475 fclose(conf);
476
477 return buf;
478 }
479 }
480
481 return NULL;
482 }
483
484 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
485 {
486 fd_set rfds;
487 struct timeval tv = { 2, 0 };
488
489 FD_ZERO(&rfds);
490 FD_SET(sock, &rfds);
491
492 memset(buf, 0, blen);
493
494
495 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
496 return -1;
497
498 if (!FD_ISSET(sock, &rfds))
499 return -1;
500
501 return recv(sock, buf, blen, 0);
502 }
503
504 static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
505 const char *event)
506 {
507 int numtry = 0;
508 int sock = -1;
509 char *rv = NULL;
510 size_t remote_length, local_length;
511 static char buffer[10240] = { 0 };
512
513 struct sockaddr_un local = { 0 };
514 struct sockaddr_un remote = { 0 };
515
516
517 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
518 if (sock < 0)
519 return NULL;
520
521 remote.sun_family = AF_UNIX;
522 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
523 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
524
525 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
526 goto out;
527
528 if (connect(sock, (struct sockaddr *) &remote, remote_length))
529 goto out;
530
531 local.sun_family = AF_UNIX;
532 local_length = sizeof(local.sun_family) +
533 sprintf(local.sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
534
535 if (bind(sock, (struct sockaddr *) &local, local_length))
536 goto out;
537
538
539 if (event)
540 {
541 send(sock, "ATTACH", 6, 0);
542
543 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
544 goto out;
545 }
546
547
548 send(sock, cmd, strlen(cmd), 0);
549
550 while( numtry++ < 5 )
551 {
552 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
553 {
554 if (event)
555 continue;
556
557 break;
558 }
559
560 if ((!event && buffer[0] != '<') || (event && strstr(buffer, event)))
561 break;
562 }
563
564 rv = buffer;
565
566 out:
567 close(sock);
568
569 if (local.sun_family)
570 unlink(local.sun_path);
571
572 return rv;
573 }
574
575 static inline int nl80211_readint(const char *path)
576 {
577 int fd;
578 int rv = -1;
579 char buffer[16];
580
581 if ((fd = open(path, O_RDONLY)) > -1)
582 {
583 if (read(fd, buffer, sizeof(buffer)) > 0)
584 rv = atoi(buffer);
585
586 close(fd);
587 }
588
589 return rv;
590 }
591
592 static char * nl80211_phy2ifname(const char *ifname)
593 {
594 int fd, ifidx = -1, cifidx = -1, phyidx = -1;
595 char buffer[64];
596 static char nif[IFNAMSIZ] = { 0 };
597
598 DIR *d;
599 struct dirent *e;
600
601 if (!ifname)
602 return NULL;
603 else if (!strncmp(ifname, "phy", 3))
604 phyidx = atoi(&ifname[3]);
605 else if (!strncmp(ifname, "radio", 5))
606 phyidx = atoi(&ifname[5]);
607
608 memset(nif, 0, sizeof(nif));
609
610 if (phyidx > -1)
611 {
612 if ((d = opendir("/sys/class/net")) != NULL)
613 {
614 while ((e = readdir(d)) != NULL)
615 {
616 snprintf(buffer, sizeof(buffer),
617 "/sys/class/net/%s/phy80211/index", e->d_name);
618
619 if (nl80211_readint(buffer) == phyidx)
620 {
621 snprintf(buffer, sizeof(buffer),
622 "/sys/class/net/%s/ifindex", e->d_name);
623
624 if ((cifidx = nl80211_readint(buffer)) >= 0 &&
625 ((ifidx < 0) || (cifidx < ifidx)))
626 {
627 ifidx = cifidx;
628 strncpy(nif, e->d_name, sizeof(nif));
629 }
630 }
631 }
632
633 closedir(d);
634 }
635 }
636
637 return nif[0] ? nif : NULL;
638 }
639
640 static char * nl80211_ifadd(const char *ifname)
641 {
642 int phyidx;
643 char *rv = NULL;
644 static char nif[IFNAMSIZ] = { 0 };
645 struct nl80211_msg_conveyor *req, *res;
646
647 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
648 if (req)
649 {
650 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
651
652 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
653 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
654
655 nl80211_send(req, NULL, NULL);
656
657 rv = nif;
658
659 nla_put_failure:
660 nl80211_free(req);
661 }
662
663 return rv;
664 }
665
666 static void nl80211_ifdel(const char *ifname)
667 {
668 struct nl80211_msg_conveyor *req;
669
670 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
671 if (req)
672 {
673 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
674
675 nl80211_send(req, NULL, NULL);
676
677 nla_put_failure:
678 nl80211_free(req);
679 }
680 }
681
682 static void nl80211_hostapd_hup(const char *ifname)
683 {
684 int fd, pid = 0;
685 char buf[32];
686 char *phy = nl80211_ifname2phy(ifname);
687
688 if (phy)
689 {
690 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
691 if ((fd = open(buf, O_RDONLY)) > 0)
692 {
693 if (read(fd, buf, sizeof(buf)) > 0)
694 pid = atoi(buf);
695
696 close(fd);
697 }
698
699 if (pid > 0)
700 kill(pid, 1);
701 }
702 }
703
704
705 int nl80211_probe(const char *ifname)
706 {
707 return !!nl80211_ifname2phy(ifname);
708 }
709
710 void nl80211_close(void)
711 {
712 if (nls)
713 {
714 if (nls->nlctrl)
715 genl_family_put(nls->nlctrl);
716
717 if (nls->nl80211)
718 genl_family_put(nls->nl80211);
719
720 if (nls->nl_sock)
721 nl_socket_free(nls->nl_sock);
722
723 if (nls->nl_cache)
724 nl_cache_free(nls->nl_cache);
725
726 free(nls);
727 nls = NULL;
728 }
729 }
730
731
732 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
733 {
734 int *mode = arg;
735 struct nlattr **tb = nl80211_parse(msg);
736 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
737 IWINFO_OPMODE_UNKNOWN, /* unspecified */
738 IWINFO_OPMODE_ADHOC, /* IBSS */
739 IWINFO_OPMODE_CLIENT, /* managed */
740 IWINFO_OPMODE_MASTER, /* AP */
741 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
742 IWINFO_OPMODE_WDS, /* WDS */
743 IWINFO_OPMODE_MONITOR, /* monitor */
744 IWINFO_OPMODE_MESHPOINT, /* mesh point */
745 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
746 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
747 };
748
749 if (tb[NL80211_ATTR_IFTYPE])
750 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
751
752 return NL_SKIP;
753 }
754
755 int nl80211_get_mode(const char *ifname, int *buf)
756 {
757 char *res;
758 struct nl80211_msg_conveyor *req;
759
760 res = nl80211_phy2ifname(ifname);
761 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
762 *buf = IWINFO_OPMODE_UNKNOWN;
763
764 if (req)
765 {
766 nl80211_send(req, nl80211_get_mode_cb, buf);
767 nl80211_free(req);
768 }
769
770 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
771 }
772
773
774 struct nl80211_ssid_bssid {
775 unsigned char *ssid;
776 unsigned char bssid[7];
777 };
778
779 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
780 {
781 int ielen;
782 unsigned char *ie;
783 struct nl80211_ssid_bssid *sb = arg;
784 struct nlattr **tb = nl80211_parse(msg);
785 struct nlattr *bss[NL80211_BSS_MAX + 1];
786
787 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
788 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
789 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
790 };
791
792 if (!tb[NL80211_ATTR_BSS] ||
793 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
794 bss_policy) ||
795 !bss[NL80211_BSS_BSSID] ||
796 !bss[NL80211_BSS_STATUS] ||
797 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
798 {
799 return NL_SKIP;
800 }
801
802 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
803 {
804 case NL80211_BSS_STATUS_ASSOCIATED:
805 case NL80211_BSS_STATUS_AUTHENTICATED:
806 case NL80211_BSS_STATUS_IBSS_JOINED:
807
808 if (sb->ssid)
809 {
810 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
811 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
812
813 while (ielen >= 2 && ielen >= ie[1])
814 {
815 if (ie[0] == 0)
816 {
817 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
818 return NL_SKIP;
819 }
820
821 ielen -= ie[1] + 2;
822 ie += ie[1] + 2;
823 }
824 }
825 else
826 {
827 sb->bssid[0] = 1;
828 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
829 return NL_SKIP;
830 }
831
832 default:
833 return NL_SKIP;
834 }
835 }
836
837 int nl80211_get_ssid(const char *ifname, char *buf)
838 {
839 char *res;
840 struct nl80211_msg_conveyor *req;
841 struct nl80211_ssid_bssid sb;
842
843 /* try to find ssid from scan dump results */
844 res = nl80211_phy2ifname(ifname);
845 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
846
847 sb.ssid = buf;
848 *buf = 0;
849
850 if (req)
851 {
852 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
853 nl80211_free(req);
854 }
855
856 /* failed, try to find from hostapd info */
857 if ((*buf == 0) &&
858 (res = nl80211_hostapd_info(ifname)) &&
859 (res = nl80211_getval(ifname, res, "ssid")))
860 {
861 memcpy(buf, res, strlen(res));
862 }
863
864 return (*buf == 0) ? -1 : 0;
865 }
866
867 int nl80211_get_bssid(const char *ifname, char *buf)
868 {
869 char *res;
870 struct nl80211_msg_conveyor *req;
871 struct nl80211_ssid_bssid sb;
872
873 /* try to find bssid from scan dump results */
874 res = nl80211_phy2ifname(ifname);
875 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
876
877 sb.ssid = NULL;
878 sb.bssid[0] = 0;
879
880 if (req)
881 {
882 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
883 nl80211_free(req);
884 }
885
886 /* failed, try to find mac from hostapd info */
887 if ((sb.bssid[0] == 0) &&
888 (res = nl80211_hostapd_info(ifname)) &&
889 (res = nl80211_getval(ifname, res, "bssid")))
890 {
891 sb.bssid[0] = 1;
892 sb.bssid[1] = strtol(&res[0], NULL, 16);
893 sb.bssid[2] = strtol(&res[3], NULL, 16);
894 sb.bssid[3] = strtol(&res[6], NULL, 16);
895 sb.bssid[4] = strtol(&res[9], NULL, 16);
896 sb.bssid[5] = strtol(&res[12], NULL, 16);
897 sb.bssid[6] = strtol(&res[15], NULL, 16);
898 }
899
900 if (sb.bssid[0])
901 {
902 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
903 sb.bssid[1], sb.bssid[2], sb.bssid[3],
904 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
905
906 return 0;
907 }
908
909 return -1;
910 }
911
912
913 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
914 {
915 int *freq = arg;
916 struct nlattr **attr = nl80211_parse(msg);
917 struct nlattr *binfo[NL80211_BSS_MAX + 1];
918
919 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
920 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
921 };
922
923 if (attr[NL80211_ATTR_BSS] &&
924 !nla_parse_nested(binfo, NL80211_BSS_MAX,
925 attr[NL80211_ATTR_BSS], bss_policy))
926 {
927 if (binfo[NL80211_BSS_FREQUENCY])
928 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
929 }
930
931 return NL_SKIP;
932 }
933
934 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
935 {
936 int *freq = arg;
937 struct nlattr **tb = nl80211_parse(msg);
938
939 if (tb[NL80211_ATTR_WIPHY_FREQ])
940 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
941
942 return NL_SKIP;
943 }
944
945 int nl80211_get_frequency(const char *ifname, int *buf)
946 {
947 char *res, *channel;
948 struct nl80211_msg_conveyor *req;
949
950 /* try to find frequency from interface info */
951 res = nl80211_phy2ifname(ifname);
952 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
953 *buf = 0;
954
955 if (req)
956 {
957 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
958 nl80211_free(req);
959 }
960
961 /* failed, try to find frequency from hostapd info */
962 if ((*buf == 0) &&
963 (res = nl80211_hostapd_info(ifname)) &&
964 (channel = nl80211_getval(NULL, res, "channel")))
965 {
966 *buf = nl80211_channel2freq(atoi(channel),
967 nl80211_getval(NULL, res, "hw_mode"));
968 }
969 else
970 {
971 /* failed, try to find frequency from scan results */
972 if (*buf == 0)
973 {
974 res = nl80211_phy2ifname(ifname);
975 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN,
976 NLM_F_DUMP);
977
978 if (req)
979 {
980 nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
981 nl80211_free(req);
982 }
983 }
984 }
985
986 return (*buf == 0) ? -1 : 0;
987 }
988
989 int nl80211_get_channel(const char *ifname, int *buf)
990 {
991 if (!nl80211_get_frequency(ifname, buf))
992 {
993 *buf = nl80211_freq2channel(*buf);
994 return 0;
995 }
996
997 return -1;
998 }
999
1000
1001 int nl80211_get_txpower(const char *ifname, int *buf)
1002 {
1003 #if 0
1004 char *res;
1005 char path[PATH_MAX];
1006
1007 res = nl80211_ifname2phy(ifname);
1008 snprintf(path, sizeof(path), "/sys/kernel/debug/ieee80211/%s/power",
1009 res ? res : ifname);
1010
1011 if ((*buf = nl80211_readint(path)) > -1)
1012 return 0;
1013 #endif
1014
1015 return wext_get_txpower(ifname, buf);
1016 }
1017
1018
1019 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1020 {
1021 int8_t dbm;
1022 int16_t mbit;
1023 struct nl80211_rssi_rate *rr = arg;
1024 struct nlattr **attr = nl80211_parse(msg);
1025 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1026 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1027
1028 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1029 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1030 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1031 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1032 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1033 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1034 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1035 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1036 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1037 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1038 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1039 };
1040
1041 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1042 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1043 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1044 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1045 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1046 };
1047
1048 if (attr[NL80211_ATTR_STA_INFO])
1049 {
1050 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1051 attr[NL80211_ATTR_STA_INFO], stats_policy))
1052 {
1053 if (sinfo[NL80211_STA_INFO_SIGNAL])
1054 {
1055 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1056 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1057 }
1058
1059 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1060 {
1061 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1062 sinfo[NL80211_STA_INFO_TX_BITRATE],
1063 rate_policy))
1064 {
1065 if (rinfo[NL80211_RATE_INFO_BITRATE])
1066 {
1067 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1068 rr->rate = rr->rate
1069 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1070 }
1071 }
1072 }
1073 }
1074 }
1075
1076 return NL_SKIP;
1077 }
1078
1079 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1080 {
1081 DIR *d;
1082 struct dirent *de;
1083 struct nl80211_msg_conveyor *req;
1084
1085 r->rssi = 0;
1086 r->rate = 0;
1087
1088 if ((d = opendir("/sys/class/net")) != NULL)
1089 {
1090 while ((de = readdir(d)) != NULL)
1091 {
1092 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1093 (!de->d_name[strlen(ifname)] ||
1094 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1095 {
1096 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1097 NLM_F_DUMP);
1098
1099 if (req)
1100 {
1101 nl80211_send(req, nl80211_fill_signal_cb, r);
1102 nl80211_free(req);
1103 }
1104 }
1105 }
1106
1107 closedir(d);
1108 }
1109 }
1110
1111 int nl80211_get_bitrate(const char *ifname, int *buf)
1112 {
1113 struct nl80211_rssi_rate rr;
1114
1115 nl80211_fill_signal(ifname, &rr);
1116
1117 if (rr.rate)
1118 {
1119 *buf = (rr.rate * 100);
1120 return 0;
1121 }
1122
1123 return -1;
1124 }
1125
1126 int nl80211_get_signal(const char *ifname, int *buf)
1127 {
1128 struct nl80211_rssi_rate rr;
1129
1130 nl80211_fill_signal(ifname, &rr);
1131
1132 if (rr.rssi)
1133 {
1134 *buf = rr.rssi;
1135 return 0;
1136 }
1137
1138 return -1;
1139 }
1140
1141 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1142 {
1143 int8_t *noise = arg;
1144 struct nlattr **tb = nl80211_parse(msg);
1145 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1146
1147 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1148 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1149 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1150 };
1151
1152 if (!tb[NL80211_ATTR_SURVEY_INFO])
1153 return NL_SKIP;
1154
1155 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1156 tb[NL80211_ATTR_SURVEY_INFO], sp))
1157 return NL_SKIP;
1158
1159 if (!si[NL80211_SURVEY_INFO_NOISE])
1160 return NL_SKIP;
1161
1162 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1163 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1164
1165 return NL_SKIP;
1166 }
1167
1168
1169 int nl80211_get_noise(const char *ifname, int *buf)
1170 {
1171 int8_t noise;
1172 struct nl80211_msg_conveyor *req;
1173
1174 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1175 if (req)
1176 {
1177 noise = 0;
1178
1179 nl80211_send(req, nl80211_get_noise_cb, &noise);
1180 nl80211_free(req);
1181
1182 if (noise)
1183 {
1184 *buf = noise;
1185 return 0;
1186 }
1187 }
1188
1189 return -1;
1190 }
1191
1192 int nl80211_get_quality(const char *ifname, int *buf)
1193 {
1194 int signal;
1195
1196 if (!nl80211_get_signal(ifname, &signal))
1197 {
1198 /* A positive signal level is usually just a quality
1199 * value, pass through as-is */
1200 if (signal >= 0)
1201 {
1202 *buf = signal;
1203 }
1204
1205 /* The cfg80211 wext compat layer assumes a signal range
1206 * of -110 dBm to -40 dBm, the quality value is derived
1207 * by adding 110 to the signal level */
1208 else
1209 {
1210 if (signal < -110)
1211 signal = -110;
1212 else if (signal > -40)
1213 signal = -40;
1214
1215 *buf = (signal + 110);
1216 }
1217
1218 return 0;
1219 }
1220
1221 return -1;
1222 }
1223
1224 int nl80211_get_quality_max(const char *ifname, int *buf)
1225 {
1226 /* The cfg80211 wext compat layer assumes a maximum
1227 * quality of 70 */
1228 *buf = 70;
1229
1230 return 0;
1231 }
1232
1233 int nl80211_get_encryption(const char *ifname, char *buf)
1234 {
1235 int i;
1236 char k[9];
1237 char *val, *res;
1238 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1239
1240 /* WPA supplicant */
1241 if ((res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
1242 (val = nl80211_getval(NULL, res, "pairwise_cipher")))
1243 {
1244 /* WEP */
1245 if (strstr(val, "WEP"))
1246 {
1247 if (strstr(val, "WEP-40"))
1248 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1249
1250 else if (strstr(val, "WEP-104"))
1251 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1252
1253 c->enabled = 1;
1254 c->group_ciphers = c->pair_ciphers;
1255
1256 c->auth_suites |= IWINFO_KMGMT_NONE;
1257 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1258 }
1259
1260 /* WPA */
1261 else
1262 {
1263 if (strstr(val, "TKIP"))
1264 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1265
1266 else if (strstr(val, "CCMP"))
1267 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1268
1269 else if (strstr(val, "NONE"))
1270 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1271
1272 else if (strstr(val, "WEP-40"))
1273 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1274
1275 else if (strstr(val, "WEP-104"))
1276 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1277
1278
1279 if ((val = nl80211_getval(NULL, res, "group_cipher")))
1280 {
1281 if (strstr(val, "TKIP"))
1282 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1283
1284 else if (strstr(val, "CCMP"))
1285 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1286
1287 else if (strstr(val, "NONE"))
1288 c->group_ciphers |= IWINFO_CIPHER_NONE;
1289
1290 else if (strstr(val, "WEP-40"))
1291 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1292
1293 else if (strstr(val, "WEP-104"))
1294 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1295 }
1296
1297
1298 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
1299 {
1300 if (strstr(val, "WPA2"))
1301 c->wpa_version = 2;
1302
1303 else if (strstr(val, "WPA"))
1304 c->wpa_version = 1;
1305
1306
1307 if (strstr(val, "PSK"))
1308 c->auth_suites |= IWINFO_KMGMT_PSK;
1309
1310 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
1311 c->auth_suites |= IWINFO_KMGMT_8021x;
1312
1313 else if (strstr(val, "NONE"))
1314 c->auth_suites |= IWINFO_KMGMT_NONE;
1315 }
1316
1317 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1318 }
1319
1320 return 0;
1321 }
1322
1323 /* Hostapd */
1324 else if ((res = nl80211_hostapd_info(ifname)))
1325 {
1326 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
1327 c->wpa_version = atoi(val);
1328
1329 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
1330
1331 if (!val || strstr(val, "PSK"))
1332 c->auth_suites |= IWINFO_KMGMT_PSK;
1333
1334 if (val && strstr(val, "EAP"))
1335 c->auth_suites |= IWINFO_KMGMT_8021x;
1336
1337 if (val && strstr(val, "NONE"))
1338 c->auth_suites |= IWINFO_KMGMT_NONE;
1339
1340 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
1341 {
1342 if (strstr(val, "TKIP"))
1343 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1344
1345 if (strstr(val, "CCMP"))
1346 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1347
1348 if (strstr(val, "NONE"))
1349 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1350 }
1351
1352 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1353 {
1354 switch(atoi(val)) {
1355 case 1:
1356 c->auth_algs |= IWINFO_AUTH_OPEN;
1357 break;
1358
1359 case 2:
1360 c->auth_algs |= IWINFO_AUTH_SHARED;
1361 break;
1362
1363 case 3:
1364 c->auth_algs |= IWINFO_AUTH_OPEN;
1365 c->auth_algs |= IWINFO_AUTH_SHARED;
1366 break;
1367
1368 default:
1369 break;
1370 }
1371
1372 for (i = 0; i < 4; i++)
1373 {
1374 snprintf(k, sizeof(k), "wep_key%d", i);
1375
1376 if ((val = nl80211_getval(ifname, res, k)))
1377 {
1378 if ((strlen(val) == 5) || (strlen(val) == 10))
1379 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1380
1381 else if ((strlen(val) == 13) || (strlen(val) == 26))
1382 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1383 }
1384 }
1385 }
1386
1387 c->group_ciphers = c->pair_ciphers;
1388 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1389
1390 return 0;
1391 }
1392
1393 return -1;
1394 }
1395
1396
1397 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1398 {
1399 struct nl80211_array_buf *arr = arg;
1400 struct iwinfo_assoclist_entry *e = arr->buf;
1401 struct nlattr **attr = nl80211_parse(msg);
1402 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1403 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1404
1405 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1406 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1407 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1408 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1409 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1410 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1411 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1412 };
1413
1414 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1415 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1416 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1417 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1418 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1419 };
1420
1421 /* advance to end of array */
1422 e += arr->count;
1423 memset(e, 0, sizeof(*e));
1424
1425 if (attr[NL80211_ATTR_MAC])
1426 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1427
1428 if (attr[NL80211_ATTR_STA_INFO] &&
1429 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1430 attr[NL80211_ATTR_STA_INFO], stats_policy))
1431 {
1432 if (sinfo[NL80211_STA_INFO_SIGNAL])
1433 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1434
1435 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1436 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1437
1438 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1439 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1440
1441 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1442 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1443
1444 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1445 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1446 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1447 {
1448 if (rinfo[NL80211_RATE_INFO_BITRATE])
1449 e->rx_rate.rate =
1450 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1451
1452 if (rinfo[NL80211_RATE_INFO_MCS])
1453 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1454
1455 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1456 e->rx_rate.is_40mhz = 1;
1457
1458 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1459 e->rx_rate.is_short_gi = 1;
1460 }
1461
1462 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1463 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1464 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1465 {
1466 if (rinfo[NL80211_RATE_INFO_BITRATE])
1467 e->tx_rate.rate =
1468 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1469
1470 if (rinfo[NL80211_RATE_INFO_MCS])
1471 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1472
1473 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1474 e->tx_rate.is_40mhz = 1;
1475
1476 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1477 e->tx_rate.is_short_gi = 1;
1478 }
1479 }
1480
1481 e->noise = 0; /* filled in by caller */
1482 arr->count++;
1483
1484 return NL_SKIP;
1485 }
1486
1487 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1488 {
1489 DIR *d;
1490 int i, noise = 0;
1491 struct dirent *de;
1492 struct nl80211_msg_conveyor *req;
1493 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1494 struct iwinfo_assoclist_entry *e;
1495
1496 if ((d = opendir("/sys/class/net")) != NULL)
1497 {
1498 while ((de = readdir(d)) != NULL)
1499 {
1500 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1501 (!de->d_name[strlen(ifname)] ||
1502 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1503 {
1504 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1505 NLM_F_DUMP);
1506
1507 if (req)
1508 {
1509 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1510 nl80211_free(req);
1511 }
1512 }
1513 }
1514
1515 closedir(d);
1516
1517 if (!nl80211_get_noise(ifname, &noise))
1518 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1519 e->noise = noise;
1520
1521 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1522 return 0;
1523 }
1524
1525 return -1;
1526 }
1527
1528 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1529 {
1530 int *dbm_max = arg;
1531 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1532
1533 struct nlattr **attr = nl80211_parse(msg);
1534 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1535 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1536 struct nlattr *band, *freq;
1537
1538 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1539 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1540 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1541 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1542 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1543 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1544 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1545 };
1546
1547 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1548 *dbm_max = -1;
1549
1550 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1551 {
1552 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1553 nla_len(band), NULL);
1554
1555 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1556 {
1557 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1558 nla_data(freq), nla_len(freq), freq_policy);
1559
1560 ch_cmp = nl80211_freq2channel(nla_get_u32(
1561 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1562
1563 if ((!ch_cur || (ch_cmp == ch_cur)) &&
1564 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1565 {
1566 *dbm_max = (int)(0.01 * nla_get_u32(
1567 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1568
1569 break;
1570 }
1571 }
1572 }
1573
1574 return NL_SKIP;
1575 }
1576
1577 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1578 {
1579 int ch_cur;
1580 int dbm_max = -1, dbm_cur, dbm_cnt;
1581 struct nl80211_msg_conveyor *req;
1582 struct iwinfo_txpwrlist_entry entry;
1583
1584 if (nl80211_get_channel(ifname, &ch_cur))
1585 ch_cur = 0;
1586
1587 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1588 if (req)
1589 {
1590 /* initialize the value pointer with channel for callback */
1591 dbm_max = ch_cur;
1592
1593 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1594 nl80211_free(req);
1595 }
1596
1597 if (dbm_max > 0)
1598 {
1599 for (dbm_cur = 0, dbm_cnt = 0;
1600 dbm_cur < dbm_max;
1601 dbm_cur++, dbm_cnt++)
1602 {
1603 entry.dbm = dbm_cur;
1604 entry.mw = iwinfo_dbm2mw(dbm_cur);
1605
1606 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1607 }
1608
1609 entry.dbm = dbm_max;
1610 entry.mw = iwinfo_dbm2mw(dbm_max);
1611
1612 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1613 dbm_cnt++;
1614
1615 *len = dbm_cnt * sizeof(entry);
1616 return 0;
1617 }
1618
1619 return -1;
1620 }
1621
1622 static void nl80211_get_scancrypto(const char *spec,
1623 struct iwinfo_crypto_entry *c)
1624 {
1625 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1626 {
1627 c->enabled = 1;
1628
1629 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1630 c->wpa_version = 3;
1631
1632 else if (strstr(spec, "WPA2"))
1633 c->wpa_version = 2;
1634
1635 else if (strstr(spec, "WPA"))
1636 c->wpa_version = 1;
1637
1638 else if (strstr(spec, "WEP"))
1639 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1640
1641
1642 if (strstr(spec, "PSK"))
1643 c->auth_suites |= IWINFO_KMGMT_PSK;
1644
1645 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1646 c->auth_suites |= IWINFO_KMGMT_8021x;
1647
1648 if (strstr(spec, "WPA-NONE"))
1649 c->auth_suites |= IWINFO_KMGMT_NONE;
1650
1651
1652 if (strstr(spec, "TKIP"))
1653 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1654
1655 if (strstr(spec, "CCMP"))
1656 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1657
1658 if (strstr(spec, "WEP-40"))
1659 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1660
1661 if (strstr(spec, "WEP-104"))
1662 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1663
1664 c->group_ciphers = c->pair_ciphers;
1665 }
1666 else
1667 {
1668 c->enabled = 0;
1669 }
1670 }
1671
1672
1673 struct nl80211_scanlist {
1674 struct iwinfo_scanlist_entry *e;
1675 int len;
1676 };
1677
1678
1679 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1680 struct iwinfo_scanlist_entry *e)
1681 {
1682 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1683 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1684 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1685
1686 while (ielen >= 2 && ielen >= ie[1])
1687 {
1688 switch (ie[0])
1689 {
1690 case 0: /* SSID */
1691 memcpy(e->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1692 break;
1693
1694 case 48: /* RSN */
1695 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1696 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1697 break;
1698
1699 case 221: /* Vendor */
1700 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1701 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1702 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1703 break;
1704 }
1705
1706 ielen -= ie[1] + 2;
1707 ie += ie[1] + 2;
1708 }
1709 }
1710
1711 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
1712 {
1713 int8_t rssi;
1714 uint16_t caps;
1715
1716 struct nl80211_scanlist *sl = arg;
1717 struct nlattr **tb = nl80211_parse(msg);
1718 struct nlattr *bss[NL80211_BSS_MAX + 1];
1719
1720 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1721 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1722 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1723 [NL80211_BSS_BSSID] = { },
1724 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1725 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1726 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
1727 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1728 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1729 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1730 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1731 [NL80211_BSS_BEACON_IES] = { },
1732 };
1733
1734 if (!tb[NL80211_ATTR_BSS] ||
1735 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1736 bss_policy) ||
1737 !bss[NL80211_BSS_BSSID])
1738 {
1739 return NL_SKIP;
1740 }
1741
1742 if (bss[NL80211_BSS_CAPABILITY])
1743 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1744 else
1745 caps = 0;
1746
1747 memset(sl->e, 0, sizeof(*sl->e));
1748 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
1749
1750 if (caps & (1<<1))
1751 sl->e->mode = IWINFO_OPMODE_ADHOC;
1752 else
1753 sl->e->mode = IWINFO_OPMODE_MASTER;
1754
1755 if (caps & (1<<4))
1756 sl->e->crypto.enabled = 1;
1757
1758 if (bss[NL80211_BSS_FREQUENCY])
1759 sl->e->channel = nl80211_freq2channel(nla_get_u32(
1760 bss[NL80211_BSS_FREQUENCY]));
1761
1762 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
1763 nl80211_get_scanlist_ie(bss, sl->e);
1764
1765 if (bss[NL80211_BSS_SIGNAL_MBM])
1766 {
1767 sl->e->signal =
1768 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
1769
1770 rssi = sl->e->signal - 0x100;
1771
1772 if (rssi < -110)
1773 rssi = -110;
1774 else if (rssi > -40)
1775 rssi = -40;
1776
1777 sl->e->quality = (rssi + 110);
1778 sl->e->quality_max = 70;
1779 }
1780
1781 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
1782 {
1783 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1784 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
1785 }
1786
1787 sl->e++;
1788 sl->len++;
1789
1790 return NL_SKIP;
1791 }
1792
1793 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
1794 {
1795 struct nl80211_msg_conveyor *req;
1796 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
1797
1798 req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
1799 if (req)
1800 {
1801 nl80211_send(req, NULL, NULL);
1802 nl80211_free(req);
1803 }
1804
1805 nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
1806
1807 req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1808 if (req)
1809 {
1810 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
1811 nl80211_free(req);
1812 }
1813
1814 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
1815 return *len ? 0 : -1;
1816 }
1817
1818 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1819 {
1820 int freq, rssi, qmax, count;
1821 char *res;
1822 char ssid[128] = { 0 };
1823 char bssid[18] = { 0 };
1824 char cipher[256] = { 0 };
1825
1826 /* Got a radioX pseudo interface, find some interface on it or create one */
1827 if (!strncmp(ifname, "radio", 5))
1828 {
1829 /* Reuse existing interface */
1830 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1831 {
1832 return nl80211_get_scanlist(res, buf, len);
1833 }
1834
1835 /* Need to spawn a temporary iface for scanning */
1836 else if ((res = nl80211_ifadd(ifname)) != NULL)
1837 {
1838 count = nl80211_get_scanlist(res, buf, len);
1839 nl80211_ifdel(res);
1840 return count;
1841 }
1842 }
1843
1844 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1845
1846 /* WPA supplicant */
1847 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1848 {
1849 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1850 {
1851 nl80211_get_quality_max(ifname, &qmax);
1852
1853 /* skip header line */
1854 while (*res++ != '\n');
1855
1856 count = 0;
1857
1858 while (sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1859 bssid, &freq, &rssi, cipher, ssid) > 0)
1860 {
1861 /* BSSID */
1862 e->mac[0] = strtol(&bssid[0], NULL, 16);
1863 e->mac[1] = strtol(&bssid[3], NULL, 16);
1864 e->mac[2] = strtol(&bssid[6], NULL, 16);
1865 e->mac[3] = strtol(&bssid[9], NULL, 16);
1866 e->mac[4] = strtol(&bssid[12], NULL, 16);
1867 e->mac[5] = strtol(&bssid[15], NULL, 16);
1868
1869 /* SSID */
1870 memcpy(e->ssid, ssid, min(strlen(ssid), sizeof(e->ssid) - 1));
1871
1872 /* Mode (assume master) */
1873 e->mode = IWINFO_OPMODE_MASTER;
1874
1875 /* Channel */
1876 e->channel = nl80211_freq2channel(freq);
1877
1878 /* Signal */
1879 e->signal = rssi;
1880
1881 /* Quality */
1882 if (rssi < 0)
1883 {
1884 /* The cfg80211 wext compat layer assumes a signal range
1885 * of -110 dBm to -40 dBm, the quality value is derived
1886 * by adding 110 to the signal level */
1887 if (rssi < -110)
1888 rssi = -110;
1889 else if (rssi > -40)
1890 rssi = -40;
1891
1892 e->quality = (rssi + 110);
1893 }
1894 else
1895 {
1896 e->quality = rssi;
1897 }
1898
1899 /* Max. Quality */
1900 e->quality_max = qmax;
1901
1902 /* Crypto */
1903 nl80211_get_scancrypto(cipher, &e->crypto);
1904
1905 /* advance to next line */
1906 while (*res && *res++ != '\n');
1907
1908 count++;
1909 e++;
1910
1911 memset(ssid, 0, sizeof(ssid));
1912 memset(bssid, 0, sizeof(bssid));
1913 memset(cipher, 0, sizeof(cipher));
1914 }
1915
1916 *len = count * sizeof(struct iwinfo_scanlist_entry);
1917 return 0;
1918 }
1919 }
1920
1921 /* AP scan */
1922 else
1923 {
1924 /* Got a temp interface, don't create yet another one */
1925 if (!strncmp(ifname, "tmp.", 4))
1926 {
1927 if (!iwinfo_ifup(ifname))
1928 return -1;
1929
1930 nl80211_get_scanlist_nl(ifname, buf, len);
1931 iwinfo_ifdown(ifname);
1932 return 0;
1933 }
1934
1935 /* Spawn a new scan interface */
1936 else
1937 {
1938 if (!(res = nl80211_ifadd(ifname)))
1939 goto out;
1940
1941 if (!iwinfo_ifmac(res))
1942 goto out;
1943
1944 /* if we can take the new interface up, the driver supports an
1945 * additional interface and there's no need to tear down the ap */
1946 if (iwinfo_ifup(res))
1947 {
1948 nl80211_get_scanlist_nl(res, buf, len);
1949 iwinfo_ifdown(res);
1950 }
1951
1952 /* driver cannot create secondary interface, take down ap
1953 * during scan */
1954 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1955 {
1956 nl80211_get_scanlist_nl(res, buf, len);
1957 iwinfo_ifdown(res);
1958 iwinfo_ifup(ifname);
1959 nl80211_hostapd_hup(ifname);
1960 }
1961
1962 out:
1963 nl80211_ifdel(res);
1964 return 0;
1965 }
1966 }
1967
1968 return -1;
1969 }
1970
1971 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
1972 {
1973 int bands_remain, freqs_remain;
1974
1975 struct nl80211_array_buf *arr = arg;
1976 struct iwinfo_freqlist_entry *e = arr->buf;
1977
1978 struct nlattr **attr = nl80211_parse(msg);
1979 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1980 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1981 struct nlattr *band, *freq;
1982
1983 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1984 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1985 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1986 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1987 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1988 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1989 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1990 };
1991
1992 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1993 {
1994 nla_parse(bands, NL80211_BAND_ATTR_MAX,
1995 nla_data(band), nla_len(band), NULL);
1996
1997 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1998 {
1999 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2000 nla_data(freq), nla_len(freq), NULL);
2001
2002 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2003 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2004 continue;
2005
2006 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2007 e->channel = nl80211_freq2channel(e->mhz);
2008
2009 e->restricted = (
2010 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
2011 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
2012 freqs[NL80211_FREQUENCY_ATTR_RADAR]
2013 ) ? 1 : 0;
2014
2015 e++;
2016 arr->count++;
2017 }
2018 }
2019
2020 return NL_SKIP;
2021 }
2022
2023 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2024 {
2025 struct nl80211_msg_conveyor *req;
2026 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2027
2028 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2029 if (req)
2030 {
2031 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2032 nl80211_free(req);
2033 }
2034
2035 if (arr.count > 0)
2036 {
2037 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2038 return 0;
2039 }
2040
2041 return -1;
2042 }
2043
2044 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2045 {
2046 char *buf = arg;
2047 struct nlattr **attr = nl80211_parse(msg);
2048
2049 if (attr[NL80211_ATTR_REG_ALPHA2])
2050 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2051 else
2052 buf[0] = 0;
2053
2054 return NL_SKIP;
2055 }
2056
2057 int nl80211_get_country(const char *ifname, char *buf)
2058 {
2059 int rv = -1;
2060 struct nl80211_msg_conveyor *req;
2061
2062 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2063 if (req)
2064 {
2065 nl80211_send(req, nl80211_get_country_cb, buf);
2066 nl80211_free(req);
2067
2068 if (buf[0])
2069 rv = 0;
2070 }
2071
2072 return rv;
2073 }
2074
2075 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2076 {
2077 int i, count;
2078 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2079 const struct iwinfo_iso3166_label *l;
2080
2081 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2082 {
2083 e->iso3166 = l->iso3166;
2084 e->ccode[0] = (l->iso3166 / 256);
2085 e->ccode[1] = (l->iso3166 % 256);
2086 }
2087
2088 *len = (count * sizeof(struct iwinfo_country_entry));
2089 return 0;
2090 }
2091
2092 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
2093 {
2094 int *modes = arg;
2095 int bands_remain, freqs_remain;
2096 uint16_t caps = 0;
2097 struct nlattr **attr = nl80211_parse(msg);
2098 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2099 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2100 struct nlattr *band, *freq;
2101
2102 *modes = 0;
2103
2104 if (attr[NL80211_ATTR_WIPHY_BANDS])
2105 {
2106 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2107 {
2108 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2109 nla_data(band), nla_len(band), NULL);
2110
2111 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2112 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2113
2114 /* Treat any nonzero capability as 11n */
2115 if (caps > 0)
2116 *modes |= IWINFO_80211_N;
2117
2118 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2119 freqs_remain)
2120 {
2121 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2122 nla_data(freq), nla_len(freq), NULL);
2123
2124 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2125 continue;
2126
2127 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2128 {
2129 *modes |= IWINFO_80211_B;
2130 *modes |= IWINFO_80211_G;
2131 }
2132 else
2133 {
2134 *modes |= IWINFO_80211_A;
2135 }
2136 }
2137 }
2138 }
2139
2140 return NL_SKIP;
2141 }
2142
2143 int nl80211_get_hwmodelist(const char *ifname, int *buf)
2144 {
2145 struct nl80211_msg_conveyor *req;
2146
2147 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2148 if (req)
2149 {
2150 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
2151 nl80211_free(req);
2152 }
2153
2154 return *buf ? 0 : -1;
2155 }
2156
2157 int nl80211_get_mbssid_support(const char *ifname, int *buf)
2158 {
2159 /* Test whether we can create another interface */
2160 char *nif = nl80211_ifadd(ifname);
2161
2162 if (nif)
2163 {
2164 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
2165
2166 iwinfo_ifdown(nif);
2167 nl80211_ifdel(nif);
2168
2169 return 0;
2170 }
2171
2172 return -1;
2173 }
2174
2175 int nl80211_get_hardware_id(const char *ifname, char *buf)
2176 {
2177 int rv;
2178 char *res;
2179
2180 /* Got a radioX pseudo interface, find some interface on it or create one */
2181 if (!strncmp(ifname, "radio", 5))
2182 {
2183 /* Reuse existing interface */
2184 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2185 {
2186 rv = wext_get_hardware_id(res, buf);
2187 }
2188
2189 /* Need to spawn a temporary iface for finding IDs */
2190 else if ((res = nl80211_ifadd(ifname)) != NULL)
2191 {
2192 rv = wext_get_hardware_id(res, buf);
2193 nl80211_ifdel(res);
2194 }
2195 }
2196 else
2197 {
2198 rv = wext_get_hardware_id(ifname, buf);
2199 }
2200
2201 /* Failed to obtain hardware IDs, search board config */
2202 if (rv)
2203 {
2204 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2205 }
2206
2207 return rv;
2208 }
2209
2210 static const struct iwinfo_hardware_entry *
2211 nl80211_get_hardware_entry(const char *ifname)
2212 {
2213 struct iwinfo_hardware_id id;
2214
2215 if (nl80211_get_hardware_id(ifname, (char *)&id))
2216 return NULL;
2217
2218 return iwinfo_hardware(&id);
2219 }
2220
2221 int nl80211_get_hardware_name(const char *ifname, char *buf)
2222 {
2223 const struct iwinfo_hardware_entry *hw;
2224
2225 if (!(hw = nl80211_get_hardware_entry(ifname)))
2226 sprintf(buf, "Generic MAC80211");
2227 else
2228 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2229
2230 return 0;
2231 }
2232
2233 int nl80211_get_txpower_offset(const char *ifname, int *buf)
2234 {
2235 const struct iwinfo_hardware_entry *hw;
2236
2237 if (!(hw = nl80211_get_hardware_entry(ifname)))
2238 return -1;
2239
2240 *buf = hw->txpower_offset;
2241 return 0;
2242 }
2243
2244 int nl80211_get_frequency_offset(const char *ifname, int *buf)
2245 {
2246 const struct iwinfo_hardware_entry *hw;
2247
2248 if (!(hw = nl80211_get_hardware_entry(ifname)))
2249 return -1;
2250
2251 *buf = hw->frequency_offset;
2252 return 0;
2253 }
OpenWrt Source Repository