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17d95515eed043b4e578cda3c94c2cddc76a17e5
[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
27 #define min(x, y) ((x) < (y)) ? (x) : (y)
28
29 static struct nl80211_state *nls = NULL;
30
31 static int nl80211_init(void)
32 {
33 int err, fd;
34
35 if (!nls)
36 {
37 nls = malloc(sizeof(struct nl80211_state));
38 if (!nls) {
39 err = -ENOMEM;
40 goto err;
41 }
42
43 memset(nls, 0, sizeof(*nls));
44
45 nls->nl_sock = nl_socket_alloc();
46 if (!nls->nl_sock) {
47 err = -ENOMEM;
48 goto err;
49 }
50
51 if (genl_connect(nls->nl_sock)) {
52 err = -ENOLINK;
53 goto err;
54 }
55
56 fd = nl_socket_get_fd(nls->nl_sock);
57 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
58 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 err = -ENOENT;
70 goto err;
71 }
72
73 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
74 if (!nls->nlctrl) {
75 err = -ENOENT;
76 goto err;
77 }
78 }
79
80 return 0;
81
82
83 err:
84 nl80211_close();
85 return err;
86 }
87
88
89 static int nl80211_msg_error(struct sockaddr_nl *nla,
90 struct nlmsgerr *err, void *arg)
91 {
92 int *ret = arg;
93 *ret = err->error;
94 return NL_STOP;
95 }
96
97 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
98 {
99 int *ret = arg;
100 *ret = 0;
101 return NL_SKIP;
102 }
103
104 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
105 {
106 int *ret = arg;
107 *ret = 0;
108 return NL_STOP;
109 }
110
111 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
112 {
113 return NL_SKIP;
114 }
115
116 static void nl80211_free(struct nl80211_msg_conveyor *cv)
117 {
118 if (cv)
119 {
120 if (cv->cb)
121 nl_cb_put(cv->cb);
122
123 if (cv->msg)
124 nlmsg_free(cv->msg);
125
126 cv->cb = NULL;
127 cv->msg = NULL;
128 }
129 }
130
131 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
132 int cmd, int flags)
133 {
134 static struct nl80211_msg_conveyor cv;
135
136 struct nl_msg *req = NULL;
137 struct nl_cb *cb = NULL;
138
139 req = nlmsg_alloc();
140 if (!req)
141 goto err;
142
143 cb = nl_cb_alloc(NL_CB_DEFAULT);
144 if (!cb)
145 goto err;
146
147 genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
148
149 cv.msg = req;
150 cv.cb = cb;
151
152 return &cv;
153
154 err:
155 nla_put_failure:
156 if (cb)
157 nl_cb_put(cb);
158
159 if (req)
160 nlmsg_free(req);
161
162 return NULL;
163 }
164
165 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
166 {
167 if (nl80211_init() < 0)
168 return NULL;
169
170 return nl80211_new(nls->nlctrl, cmd, flags);
171 }
172
173 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
174 int cmd, int flags)
175 {
176 int ifidx = -1, phyidx = -1;
177 struct nl80211_msg_conveyor *cv;
178
179 if (nl80211_init() < 0)
180 return NULL;
181
182 if (!strncmp(ifname, "phy", 3))
183 phyidx = atoi(&ifname[3]);
184 else if (!strncmp(ifname, "radio", 5))
185 phyidx = atoi(&ifname[5]);
186 else if (!strncmp(ifname, "mon.", 4))
187 ifidx = if_nametoindex(&ifname[4]);
188 else
189 ifidx = if_nametoindex(ifname);
190
191 if ((ifidx < 0) && (phyidx < 0))
192 return NULL;
193
194 cv = nl80211_new(nls->nl80211, cmd, flags);
195 if (!cv)
196 return NULL;
197
198 if (ifidx > -1)
199 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
200
201 if (phyidx > -1)
202 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
203
204 return cv;
205
206 nla_put_failure:
207 nl80211_free(cv);
208 return NULL;
209 }
210
211 static struct nl80211_msg_conveyor * nl80211_send(
212 struct nl80211_msg_conveyor *cv,
213 int (*cb_func)(struct nl_msg *, void *), void *cb_arg
214 ) {
215 static struct nl80211_msg_conveyor rcv;
216 int err = 1;
217
218 if (cb_func)
219 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
220 else
221 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
222
223 if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
224 goto err;
225
226 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
227 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
228 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
229
230 while (err > 0)
231 nl_recvmsgs(nls->nl_sock, cv->cb);
232
233 return &rcv;
234
235 err:
236 nl_cb_put(cv->cb);
237 nlmsg_free(cv->msg);
238
239 return NULL;
240 }
241
242 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
243 {
244 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
245 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
246
247 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
248 genlmsg_attrlen(gnlh, 0), NULL);
249
250 return attr;
251 }
252
253
254 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
255 {
256 struct nl80211_group_conveyor *cv = arg;
257
258 struct nlattr **attr = nl80211_parse(msg);
259 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
260 struct nlattr *mgrp;
261 int mgrpidx;
262
263 if (!attr[CTRL_ATTR_MCAST_GROUPS])
264 return NL_SKIP;
265
266 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
267 {
268 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
269 nla_data(mgrp), nla_len(mgrp), NULL);
270
271 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
272 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
273 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
274 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
275 {
276 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
277 break;
278 }
279 }
280
281 return NL_SKIP;
282 }
283
284 static int nl80211_subscribe(const char *family, const char *group)
285 {
286 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
287 struct nl80211_msg_conveyor *req;
288
289 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
290 if (req)
291 {
292 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
293 nl80211_send(req, nl80211_subscribe_cb, &cv);
294
295 nla_put_failure:
296 nl80211_free(req);
297 }
298
299 return nl_socket_add_membership(nls->nl_sock, cv.id);
300 }
301
302
303 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
304 {
305 struct nl80211_event_conveyor *cv = arg;
306 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
307
308 if (gnlh->cmd == cv->wait)
309 cv->recv = gnlh->cmd;
310
311 return NL_SKIP;
312 }
313
314 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
315 {
316 return NL_OK;
317 }
318
319 static int nl80211_wait(const char *family, const char *group, int cmd)
320 {
321 struct nl80211_event_conveyor cv = { .wait = cmd };
322 struct nl_cb *cb;
323
324 if (nl80211_subscribe(family, group))
325 return -ENOENT;
326
327 cb = nl_cb_alloc(NL_CB_DEFAULT);
328
329 if (!cb)
330 return -ENOMEM;
331
332 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
333 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
334
335 while (!cv.recv)
336 nl_recvmsgs(nls->nl_sock, cb);
337
338 nl_cb_put(cb);
339
340 return 0;
341 }
342
343
344 static int nl80211_freq2channel(int freq)
345 {
346 if (freq == 2484)
347 return 14;
348 else if (freq < 2484)
349 return (freq - 2407) / 5;
350 else if (freq >= 4910 && freq <= 4980)
351 return (freq - 4000) / 5;
352 else
353 return (freq - 5000) / 5;
354 }
355
356 static int nl80211_channel2freq(int channel, const char *band)
357 {
358 if (!band || band[0] != 'a')
359 {
360 if (channel == 14)
361 return 2484;
362 else if (channel < 14)
363 return (channel * 5) + 2407;
364 }
365 else
366 {
367 if (channel >= 182 && channel <= 196)
368 return (channel * 5) + 4000;
369 else
370 return (channel * 5) + 5000;
371 }
372
373 return 0;
374 }
375
376 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
377 {
378 int i, len;
379 char lkey[64] = { 0 };
380 const char *ln = buf;
381 static char lval[256] = { 0 };
382
383 int matched_if = ifname ? 0 : 1;
384
385
386 for( i = 0, len = strlen(buf); i < len; i++ )
387 {
388 if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
389 {
390 ln++;
391 }
392 else if (!lkey[0] && (buf[i] == '='))
393 {
394 if ((&buf[i] - ln) > 0)
395 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
396 }
397 else if (buf[i] == '\n')
398 {
399 if (lkey[0])
400 {
401 memcpy(lval, ln + strlen(lkey) + 1,
402 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
403
404 if ((ifname != NULL) &&
405 (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
406 {
407 matched_if = !strcmp(lval, ifname);
408 }
409 else if (matched_if && !strcmp(lkey, key))
410 {
411 return lval;
412 }
413 }
414
415 ln = &buf[i+1];
416 memset(lkey, 0, sizeof(lkey));
417 memset(lval, 0, sizeof(lval));
418 }
419 }
420
421 return NULL;
422 }
423
424 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
425 {
426 char *buf = arg;
427 struct nlattr **attr = nl80211_parse(msg);
428
429 if (attr[NL80211_ATTR_WIPHY_NAME])
430 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
431 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
432 else
433 buf[0] = 0;
434
435 return NL_SKIP;
436 }
437
438 static char * nl80211_ifname2phy(const char *ifname)
439 {
440 static char phy[32] = { 0 };
441 struct nl80211_msg_conveyor *req;
442
443 memset(phy, 0, sizeof(phy));
444
445 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
446 if (req)
447 {
448 nl80211_send(req, nl80211_ifname2phy_cb, phy);
449 nl80211_free(req);
450 }
451
452 return phy[0] ? phy : NULL;
453 }
454
455 static char * nl80211_hostapd_info(const char *ifname)
456 {
457 int mode;
458 char *phy;
459 char path[32] = { 0 };
460 static char buf[4096] = { 0 };
461 FILE *conf;
462
463 if (nl80211_get_mode(ifname, &mode))
464 return NULL;
465
466 if ((mode == IWINFO_OPMODE_MASTER || mode == IWINFO_OPMODE_AP_VLAN) &&
467 (phy = nl80211_ifname2phy(ifname)) != NULL)
468 {
469 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
470
471 if ((conf = fopen(path, "r")) != NULL)
472 {
473 fread(buf, sizeof(buf) - 1, 1, conf);
474 fclose(conf);
475
476 return buf;
477 }
478 }
479
480 return NULL;
481 }
482
483 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
484 {
485 fd_set rfds;
486 struct timeval tv = { 2, 0 };
487
488 FD_ZERO(&rfds);
489 FD_SET(sock, &rfds);
490
491 memset(buf, 0, blen);
492
493
494 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
495 return -1;
496
497 if (!FD_ISSET(sock, &rfds))
498 return -1;
499
500 return recv(sock, buf, blen, 0);
501 }
502
503 static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
504 const char *event)
505 {
506 int numtry = 0;
507 int sock = -1;
508 char *rv = NULL;
509 size_t remote_length, local_length;
510 static char buffer[10240] = { 0 };
511
512 struct sockaddr_un local = { 0 };
513 struct sockaddr_un remote = { 0 };
514
515
516 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
517 if (sock < 0)
518 return NULL;
519
520 remote.sun_family = AF_UNIX;
521 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
522 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
523
524 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
525 goto out;
526
527 if (connect(sock, (struct sockaddr *) &remote, remote_length))
528 {
529 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
530 "/var/run/wpa_supplicant/%s", ifname);
531
532 if (connect(sock, (struct sockaddr *) &remote, remote_length))
533 goto out;
534 }
535
536 local.sun_family = AF_UNIX;
537 local_length = sizeof(local.sun_family) +
538 sprintf(local.sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
539
540 if (bind(sock, (struct sockaddr *) &local, local_length))
541 goto out;
542
543
544 if (event)
545 {
546 send(sock, "ATTACH", 6, 0);
547
548 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
549 goto out;
550 }
551
552
553 send(sock, cmd, strlen(cmd), 0);
554
555 /* we might have to scan up to 72 channels / 256ms per channel */
556 /* this makes up to 18.5s hence 10 tries */
557 while( numtry++ < 10 )
558 {
559 char *bracket;
560
561 /* make sure there is a terminating nul byte */
562 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
563 {
564 if (event)
565 continue;
566
567 break;
568 }
569
570 if ((!event && buffer[0] != '<') || (event && strstr(buffer, event)))
571 break;
572
573 /* there may be more than max(numtry) BSS-ADDED events */
574 /* ignore them similar to wpa_cli */
575 if (buffer[0] == '<' &&
576 (bracket=strchr(buffer,'>')) != NULL &&
577 strncmp(bracket+1,"CTRL-EVENT-BSS-ADDED",20) == 0)
578 numtry--;
579 }
580
581 rv = buffer;
582
583 out:
584 close(sock);
585
586 if (local.sun_family)
587 unlink(local.sun_path);
588
589 return rv;
590 }
591
592 static inline int nl80211_readint(const char *path)
593 {
594 int fd;
595 int rv = -1;
596 char buffer[16];
597
598 if ((fd = open(path, O_RDONLY)) > -1)
599 {
600 if (read(fd, buffer, sizeof(buffer)) > 0)
601 rv = atoi(buffer);
602
603 close(fd);
604 }
605
606 return rv;
607 }
608
609 static char * nl80211_phy2ifname(const char *ifname)
610 {
611 int fd, ifidx = -1, cifidx = -1, phyidx = -1;
612 char buffer[64];
613 static char nif[IFNAMSIZ] = { 0 };
614
615 DIR *d;
616 struct dirent *e;
617
618 if (!ifname)
619 return NULL;
620 else if (!strncmp(ifname, "phy", 3))
621 phyidx = atoi(&ifname[3]);
622 else if (!strncmp(ifname, "radio", 5))
623 phyidx = atoi(&ifname[5]);
624
625 memset(nif, 0, sizeof(nif));
626
627 if (phyidx > -1)
628 {
629 if ((d = opendir("/sys/class/net")) != NULL)
630 {
631 while ((e = readdir(d)) != NULL)
632 {
633 snprintf(buffer, sizeof(buffer),
634 "/sys/class/net/%s/phy80211/index", e->d_name);
635
636 if (nl80211_readint(buffer) == phyidx)
637 {
638 snprintf(buffer, sizeof(buffer),
639 "/sys/class/net/%s/ifindex", e->d_name);
640
641 if ((cifidx = nl80211_readint(buffer)) >= 0 &&
642 ((ifidx < 0) || (cifidx < ifidx)))
643 {
644 ifidx = cifidx;
645 strncpy(nif, e->d_name, sizeof(nif));
646 }
647 }
648 }
649
650 closedir(d);
651 }
652 }
653
654 return nif[0] ? nif : NULL;
655 }
656
657 static char * nl80211_ifadd(const char *ifname)
658 {
659 int phyidx;
660 char *rv = NULL;
661 static char nif[IFNAMSIZ] = { 0 };
662 struct nl80211_msg_conveyor *req, *res;
663
664 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
665 if (req)
666 {
667 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
668
669 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
670 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
671
672 nl80211_send(req, NULL, NULL);
673
674 rv = nif;
675
676 nla_put_failure:
677 nl80211_free(req);
678 }
679
680 return rv;
681 }
682
683 static void nl80211_ifdel(const char *ifname)
684 {
685 struct nl80211_msg_conveyor *req;
686
687 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
688 if (req)
689 {
690 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
691
692 nl80211_send(req, NULL, NULL);
693
694 nla_put_failure:
695 nl80211_free(req);
696 }
697 }
698
699 static void nl80211_hostapd_hup(const char *ifname)
700 {
701 int fd, pid = 0;
702 char buf[32];
703 char *phy = nl80211_ifname2phy(ifname);
704
705 if (phy)
706 {
707 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
708 if ((fd = open(buf, O_RDONLY)) > 0)
709 {
710 if (read(fd, buf, sizeof(buf)) > 0)
711 pid = atoi(buf);
712
713 close(fd);
714 }
715
716 if (pid > 0)
717 kill(pid, 1);
718 }
719 }
720
721
722 int nl80211_probe(const char *ifname)
723 {
724 return !!nl80211_ifname2phy(ifname);
725 }
726
727 void nl80211_close(void)
728 {
729 if (nls)
730 {
731 if (nls->nlctrl)
732 genl_family_put(nls->nlctrl);
733
734 if (nls->nl80211)
735 genl_family_put(nls->nl80211);
736
737 if (nls->nl_sock)
738 nl_socket_free(nls->nl_sock);
739
740 if (nls->nl_cache)
741 nl_cache_free(nls->nl_cache);
742
743 free(nls);
744 nls = NULL;
745 }
746 }
747
748
749 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
750 {
751 int *mode = arg;
752 struct nlattr **tb = nl80211_parse(msg);
753 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
754 IWINFO_OPMODE_UNKNOWN, /* unspecified */
755 IWINFO_OPMODE_ADHOC, /* IBSS */
756 IWINFO_OPMODE_CLIENT, /* managed */
757 IWINFO_OPMODE_MASTER, /* AP */
758 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
759 IWINFO_OPMODE_WDS, /* WDS */
760 IWINFO_OPMODE_MONITOR, /* monitor */
761 IWINFO_OPMODE_MESHPOINT, /* mesh point */
762 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
763 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
764 };
765
766 if (tb[NL80211_ATTR_IFTYPE])
767 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
768
769 return NL_SKIP;
770 }
771
772 int nl80211_get_mode(const char *ifname, int *buf)
773 {
774 char *res;
775 struct nl80211_msg_conveyor *req;
776
777 res = nl80211_phy2ifname(ifname);
778 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
779 *buf = IWINFO_OPMODE_UNKNOWN;
780
781 if (req)
782 {
783 nl80211_send(req, nl80211_get_mode_cb, buf);
784 nl80211_free(req);
785 }
786
787 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
788 }
789
790
791 struct nl80211_ssid_bssid {
792 unsigned char *ssid;
793 unsigned char bssid[7];
794 };
795
796 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
797 {
798 int ielen;
799 unsigned char *ie;
800 struct nl80211_ssid_bssid *sb = arg;
801 struct nlattr **tb = nl80211_parse(msg);
802 struct nlattr *bss[NL80211_BSS_MAX + 1];
803
804 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
805 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
806 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
807 };
808
809 if (!tb[NL80211_ATTR_BSS] ||
810 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
811 bss_policy) ||
812 !bss[NL80211_BSS_BSSID] ||
813 !bss[NL80211_BSS_STATUS] ||
814 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
815 {
816 return NL_SKIP;
817 }
818
819 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
820 {
821 case NL80211_BSS_STATUS_ASSOCIATED:
822 case NL80211_BSS_STATUS_AUTHENTICATED:
823 case NL80211_BSS_STATUS_IBSS_JOINED:
824
825 if (sb->ssid)
826 {
827 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
828 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
829
830 while (ielen >= 2 && ielen >= ie[1])
831 {
832 if (ie[0] == 0)
833 {
834 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
835 return NL_SKIP;
836 }
837
838 ielen -= ie[1] + 2;
839 ie += ie[1] + 2;
840 }
841 }
842 else
843 {
844 sb->bssid[0] = 1;
845 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
846 return NL_SKIP;
847 }
848
849 default:
850 return NL_SKIP;
851 }
852 }
853
854 int nl80211_get_ssid(const char *ifname, char *buf)
855 {
856 char *res;
857 struct nl80211_msg_conveyor *req;
858 struct nl80211_ssid_bssid sb;
859
860 /* try to find ssid from scan dump results */
861 res = nl80211_phy2ifname(ifname);
862 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
863
864 sb.ssid = buf;
865 *buf = 0;
866
867 if (req)
868 {
869 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
870 nl80211_free(req);
871 }
872
873 /* failed, try to find from hostapd info */
874 if ((*buf == 0) &&
875 (res = nl80211_hostapd_info(ifname)) &&
876 (res = nl80211_getval(ifname, res, "ssid")))
877 {
878 memcpy(buf, res, strlen(res));
879 }
880
881 return (*buf == 0) ? -1 : 0;
882 }
883
884 int nl80211_get_bssid(const char *ifname, char *buf)
885 {
886 char *res;
887 struct nl80211_msg_conveyor *req;
888 struct nl80211_ssid_bssid sb;
889
890 /* try to find bssid from scan dump results */
891 res = nl80211_phy2ifname(ifname);
892 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
893
894 sb.ssid = NULL;
895 sb.bssid[0] = 0;
896
897 if (req)
898 {
899 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
900 nl80211_free(req);
901 }
902
903 /* failed, try to find mac from hostapd info */
904 if ((sb.bssid[0] == 0) &&
905 (res = nl80211_hostapd_info(ifname)) &&
906 (res = nl80211_getval(ifname, res, "bssid")))
907 {
908 sb.bssid[0] = 1;
909 sb.bssid[1] = strtol(&res[0], NULL, 16);
910 sb.bssid[2] = strtol(&res[3], NULL, 16);
911 sb.bssid[3] = strtol(&res[6], NULL, 16);
912 sb.bssid[4] = strtol(&res[9], NULL, 16);
913 sb.bssid[5] = strtol(&res[12], NULL, 16);
914 sb.bssid[6] = strtol(&res[15], NULL, 16);
915 }
916
917 if (sb.bssid[0])
918 {
919 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
920 sb.bssid[1], sb.bssid[2], sb.bssid[3],
921 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
922
923 return 0;
924 }
925
926 return -1;
927 }
928
929
930 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
931 {
932 int *freq = arg;
933 struct nlattr **attr = nl80211_parse(msg);
934 struct nlattr *binfo[NL80211_BSS_MAX + 1];
935
936 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
937 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
938 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
939 };
940
941 if (attr[NL80211_ATTR_BSS] &&
942 !nla_parse_nested(binfo, NL80211_BSS_MAX,
943 attr[NL80211_ATTR_BSS], bss_policy))
944 {
945 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
946 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
947 }
948
949 return NL_SKIP;
950 }
951
952 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
953 {
954 int *freq = arg;
955 struct nlattr **tb = nl80211_parse(msg);
956
957 if (tb[NL80211_ATTR_WIPHY_FREQ])
958 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
959
960 return NL_SKIP;
961 }
962
963 int nl80211_get_frequency(const char *ifname, int *buf)
964 {
965 int chn;
966 char *res, *channel;
967 struct nl80211_msg_conveyor *req;
968
969 /* try to find frequency from interface info */
970 res = nl80211_phy2ifname(ifname);
971 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
972 *buf = 0;
973
974 if (req)
975 {
976 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
977 nl80211_free(req);
978 }
979
980 /* failed, try to find frequency from hostapd info */
981 if ((*buf == 0) &&
982 (res = nl80211_hostapd_info(ifname)) &&
983 (channel = nl80211_getval(NULL, res, "channel")))
984 {
985 chn = atoi(channel);
986 *buf = nl80211_channel2freq(chn, nl80211_getval(NULL, res, "hw_mode"));
987 }
988 else
989 {
990 /* failed, try to find frequency from scan results */
991 if (*buf == 0)
992 {
993 res = nl80211_phy2ifname(ifname);
994 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN,
995 NLM_F_DUMP);
996
997 if (req)
998 {
999 nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
1000 nl80211_free(req);
1001 }
1002 }
1003 }
1004
1005 return (*buf == 0) ? -1 : 0;
1006 }
1007
1008 int nl80211_get_channel(const char *ifname, int *buf)
1009 {
1010 if (!nl80211_get_frequency(ifname, buf))
1011 {
1012 *buf = nl80211_freq2channel(*buf);
1013 return 0;
1014 }
1015
1016 return -1;
1017 }
1018
1019
1020 int nl80211_get_txpower(const char *ifname, int *buf)
1021 {
1022 #if 0
1023 char *res;
1024 char path[PATH_MAX];
1025
1026 res = nl80211_ifname2phy(ifname);
1027 snprintf(path, sizeof(path), "/sys/kernel/debug/ieee80211/%s/power",
1028 res ? res : ifname);
1029
1030 if ((*buf = nl80211_readint(path)) > -1)
1031 return 0;
1032 #endif
1033
1034 return wext_ops.txpower(ifname, buf);
1035 }
1036
1037
1038 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1039 {
1040 int8_t dbm;
1041 int16_t mbit;
1042 struct nl80211_rssi_rate *rr = arg;
1043 struct nlattr **attr = nl80211_parse(msg);
1044 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1045 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1046
1047 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1048 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1049 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1050 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1051 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1052 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1053 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1054 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1055 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1056 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1057 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1058 };
1059
1060 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1061 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1062 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1063 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1064 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1065 };
1066
1067 if (attr[NL80211_ATTR_STA_INFO])
1068 {
1069 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1070 attr[NL80211_ATTR_STA_INFO], stats_policy))
1071 {
1072 if (sinfo[NL80211_STA_INFO_SIGNAL])
1073 {
1074 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1075 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1076 }
1077
1078 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1079 {
1080 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1081 sinfo[NL80211_STA_INFO_TX_BITRATE],
1082 rate_policy))
1083 {
1084 if (rinfo[NL80211_RATE_INFO_BITRATE])
1085 {
1086 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1087 rr->rate = rr->rate
1088 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1089 }
1090 }
1091 }
1092 }
1093 }
1094
1095 return NL_SKIP;
1096 }
1097
1098 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1099 {
1100 DIR *d;
1101 struct dirent *de;
1102 struct nl80211_msg_conveyor *req;
1103
1104 r->rssi = 0;
1105 r->rate = 0;
1106
1107 if ((d = opendir("/sys/class/net")) != NULL)
1108 {
1109 while ((de = readdir(d)) != NULL)
1110 {
1111 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1112 (!de->d_name[strlen(ifname)] ||
1113 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1114 {
1115 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1116 NLM_F_DUMP);
1117
1118 if (req)
1119 {
1120 nl80211_send(req, nl80211_fill_signal_cb, r);
1121 nl80211_free(req);
1122 }
1123 }
1124 }
1125
1126 closedir(d);
1127 }
1128 }
1129
1130 int nl80211_get_bitrate(const char *ifname, int *buf)
1131 {
1132 struct nl80211_rssi_rate rr;
1133
1134 nl80211_fill_signal(ifname, &rr);
1135
1136 if (rr.rate)
1137 {
1138 *buf = (rr.rate * 100);
1139 return 0;
1140 }
1141
1142 return -1;
1143 }
1144
1145 int nl80211_get_signal(const char *ifname, int *buf)
1146 {
1147 struct nl80211_rssi_rate rr;
1148
1149 nl80211_fill_signal(ifname, &rr);
1150
1151 if (rr.rssi)
1152 {
1153 *buf = rr.rssi;
1154 return 0;
1155 }
1156
1157 return -1;
1158 }
1159
1160 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1161 {
1162 int8_t *noise = arg;
1163 struct nlattr **tb = nl80211_parse(msg);
1164 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1165
1166 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1167 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1168 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1169 };
1170
1171 if (!tb[NL80211_ATTR_SURVEY_INFO])
1172 return NL_SKIP;
1173
1174 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1175 tb[NL80211_ATTR_SURVEY_INFO], sp))
1176 return NL_SKIP;
1177
1178 if (!si[NL80211_SURVEY_INFO_NOISE])
1179 return NL_SKIP;
1180
1181 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1182 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1183
1184 return NL_SKIP;
1185 }
1186
1187
1188 int nl80211_get_noise(const char *ifname, int *buf)
1189 {
1190 int8_t noise;
1191 struct nl80211_msg_conveyor *req;
1192
1193 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1194 if (req)
1195 {
1196 noise = 0;
1197
1198 nl80211_send(req, nl80211_get_noise_cb, &noise);
1199 nl80211_free(req);
1200
1201 if (noise)
1202 {
1203 *buf = noise;
1204 return 0;
1205 }
1206 }
1207
1208 return -1;
1209 }
1210
1211 int nl80211_get_quality(const char *ifname, int *buf)
1212 {
1213 int signal;
1214
1215 if (!nl80211_get_signal(ifname, &signal))
1216 {
1217 /* A positive signal level is usually just a quality
1218 * value, pass through as-is */
1219 if (signal >= 0)
1220 {
1221 *buf = signal;
1222 }
1223
1224 /* The cfg80211 wext compat layer assumes a signal range
1225 * of -110 dBm to -40 dBm, the quality value is derived
1226 * by adding 110 to the signal level */
1227 else
1228 {
1229 if (signal < -110)
1230 signal = -110;
1231 else if (signal > -40)
1232 signal = -40;
1233
1234 *buf = (signal + 110);
1235 }
1236
1237 return 0;
1238 }
1239
1240 return -1;
1241 }
1242
1243 int nl80211_get_quality_max(const char *ifname, int *buf)
1244 {
1245 /* The cfg80211 wext compat layer assumes a maximum
1246 * quality of 70 */
1247 *buf = 70;
1248
1249 return 0;
1250 }
1251
1252 int nl80211_get_encryption(const char *ifname, char *buf)
1253 {
1254 int i;
1255 char k[9];
1256 char *val, *res;
1257 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1258
1259 /* WPA supplicant */
1260 if ((res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
1261 (val = nl80211_getval(NULL, res, "pairwise_cipher")))
1262 {
1263 /* WEP */
1264 if (strstr(val, "WEP"))
1265 {
1266 if (strstr(val, "WEP-40"))
1267 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1268
1269 else if (strstr(val, "WEP-104"))
1270 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1271
1272 c->enabled = 1;
1273 c->group_ciphers = c->pair_ciphers;
1274
1275 c->auth_suites |= IWINFO_KMGMT_NONE;
1276 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1277 }
1278
1279 /* WPA */
1280 else
1281 {
1282 if (strstr(val, "TKIP"))
1283 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1284
1285 else if (strstr(val, "CCMP"))
1286 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1287
1288 else if (strstr(val, "NONE"))
1289 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1290
1291 else if (strstr(val, "WEP-40"))
1292 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1293
1294 else if (strstr(val, "WEP-104"))
1295 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1296
1297
1298 if ((val = nl80211_getval(NULL, res, "group_cipher")))
1299 {
1300 if (strstr(val, "TKIP"))
1301 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1302
1303 else if (strstr(val, "CCMP"))
1304 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1305
1306 else if (strstr(val, "NONE"))
1307 c->group_ciphers |= IWINFO_CIPHER_NONE;
1308
1309 else if (strstr(val, "WEP-40"))
1310 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1311
1312 else if (strstr(val, "WEP-104"))
1313 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1314 }
1315
1316
1317 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
1318 {
1319 if (strstr(val, "WPA2"))
1320 c->wpa_version = 2;
1321
1322 else if (strstr(val, "WPA"))
1323 c->wpa_version = 1;
1324
1325
1326 if (strstr(val, "PSK"))
1327 c->auth_suites |= IWINFO_KMGMT_PSK;
1328
1329 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
1330 c->auth_suites |= IWINFO_KMGMT_8021x;
1331
1332 else if (strstr(val, "NONE"))
1333 c->auth_suites |= IWINFO_KMGMT_NONE;
1334 }
1335
1336 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1337 }
1338
1339 return 0;
1340 }
1341
1342 /* Hostapd */
1343 else if ((res = nl80211_hostapd_info(ifname)))
1344 {
1345 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
1346 c->wpa_version = atoi(val);
1347
1348 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
1349
1350 if (!val || strstr(val, "PSK"))
1351 c->auth_suites |= IWINFO_KMGMT_PSK;
1352
1353 if (val && strstr(val, "EAP"))
1354 c->auth_suites |= IWINFO_KMGMT_8021x;
1355
1356 if (val && strstr(val, "NONE"))
1357 c->auth_suites |= IWINFO_KMGMT_NONE;
1358
1359 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
1360 {
1361 if (strstr(val, "TKIP"))
1362 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1363
1364 if (strstr(val, "CCMP"))
1365 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1366
1367 if (strstr(val, "NONE"))
1368 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1369 }
1370
1371 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1372 {
1373 switch(atoi(val)) {
1374 case 1:
1375 c->auth_algs |= IWINFO_AUTH_OPEN;
1376 break;
1377
1378 case 2:
1379 c->auth_algs |= IWINFO_AUTH_SHARED;
1380 break;
1381
1382 case 3:
1383 c->auth_algs |= IWINFO_AUTH_OPEN;
1384 c->auth_algs |= IWINFO_AUTH_SHARED;
1385 break;
1386
1387 default:
1388 break;
1389 }
1390
1391 for (i = 0; i < 4; i++)
1392 {
1393 snprintf(k, sizeof(k), "wep_key%d", i);
1394
1395 if ((val = nl80211_getval(ifname, res, k)))
1396 {
1397 if ((strlen(val) == 5) || (strlen(val) == 10))
1398 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1399
1400 else if ((strlen(val) == 13) || (strlen(val) == 26))
1401 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1402 }
1403 }
1404 }
1405
1406 c->group_ciphers = c->pair_ciphers;
1407 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1408
1409 return 0;
1410 }
1411
1412 return -1;
1413 }
1414
1415 int nl80211_get_phyname(const char *ifname, char *buf)
1416 {
1417 const char *name;
1418
1419 name = nl80211_ifname2phy(ifname);
1420
1421 if (name)
1422 {
1423 strcpy(buf, name);
1424 return 0;
1425 }
1426 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1427 {
1428 name = nl80211_ifname2phy(name);
1429
1430 if (name)
1431 {
1432 strcpy(buf, ifname);
1433 return 0;
1434 }
1435 }
1436
1437 return -1;
1438 }
1439
1440
1441 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1442 {
1443 struct nl80211_array_buf *arr = arg;
1444 struct iwinfo_assoclist_entry *e = arr->buf;
1445 struct nlattr **attr = nl80211_parse(msg);
1446 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1447 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1448
1449 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1450 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1451 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1452 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1453 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1454 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1455 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1456 };
1457
1458 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1459 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1460 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1461 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1462 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1463 };
1464
1465 /* advance to end of array */
1466 e += arr->count;
1467 memset(e, 0, sizeof(*e));
1468
1469 if (attr[NL80211_ATTR_MAC])
1470 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1471
1472 if (attr[NL80211_ATTR_STA_INFO] &&
1473 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1474 attr[NL80211_ATTR_STA_INFO], stats_policy))
1475 {
1476 if (sinfo[NL80211_STA_INFO_SIGNAL])
1477 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1478
1479 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1480 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1481
1482 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1483 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1484
1485 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1486 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1487
1488 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1489 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1490 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1491 {
1492 if (rinfo[NL80211_RATE_INFO_BITRATE])
1493 e->rx_rate.rate =
1494 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1495
1496 if (rinfo[NL80211_RATE_INFO_MCS])
1497 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1498
1499 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1500 e->rx_rate.is_40mhz = 1;
1501
1502 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1503 e->rx_rate.is_short_gi = 1;
1504 }
1505
1506 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1507 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1508 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1509 {
1510 if (rinfo[NL80211_RATE_INFO_BITRATE])
1511 e->tx_rate.rate =
1512 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1513
1514 if (rinfo[NL80211_RATE_INFO_MCS])
1515 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1516
1517 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1518 e->tx_rate.is_40mhz = 1;
1519
1520 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1521 e->tx_rate.is_short_gi = 1;
1522 }
1523 }
1524
1525 e->noise = 0; /* filled in by caller */
1526 arr->count++;
1527
1528 return NL_SKIP;
1529 }
1530
1531 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1532 {
1533 DIR *d;
1534 int i, noise = 0;
1535 struct dirent *de;
1536 struct nl80211_msg_conveyor *req;
1537 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1538 struct iwinfo_assoclist_entry *e;
1539
1540 if ((d = opendir("/sys/class/net")) != NULL)
1541 {
1542 while ((de = readdir(d)) != NULL)
1543 {
1544 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1545 (!de->d_name[strlen(ifname)] ||
1546 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1547 {
1548 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1549 NLM_F_DUMP);
1550
1551 if (req)
1552 {
1553 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1554 nl80211_free(req);
1555 }
1556 }
1557 }
1558
1559 closedir(d);
1560
1561 if (!nl80211_get_noise(ifname, &noise))
1562 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1563 e->noise = noise;
1564
1565 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1566 return 0;
1567 }
1568
1569 return -1;
1570 }
1571
1572 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1573 {
1574 int *dbm_max = arg;
1575 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1576
1577 struct nlattr **attr = nl80211_parse(msg);
1578 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1579 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1580 struct nlattr *band, *freq;
1581
1582 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1583 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1584 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1585 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1586 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1587 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1588 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1589 };
1590
1591 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1592 *dbm_max = -1;
1593
1594 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1595 {
1596 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1597 nla_len(band), NULL);
1598
1599 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1600 {
1601 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1602 nla_data(freq), nla_len(freq), freq_policy);
1603
1604 ch_cmp = nl80211_freq2channel(nla_get_u32(
1605 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1606
1607 if ((!ch_cur || (ch_cmp == ch_cur)) &&
1608 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1609 {
1610 *dbm_max = (int)(0.01 * nla_get_u32(
1611 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1612
1613 break;
1614 }
1615 }
1616 }
1617
1618 return NL_SKIP;
1619 }
1620
1621 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1622 {
1623 int ch_cur;
1624 int dbm_max = -1, dbm_cur, dbm_cnt;
1625 struct nl80211_msg_conveyor *req;
1626 struct iwinfo_txpwrlist_entry entry;
1627
1628 if (nl80211_get_channel(ifname, &ch_cur))
1629 ch_cur = 0;
1630
1631 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1632 if (req)
1633 {
1634 /* initialize the value pointer with channel for callback */
1635 dbm_max = ch_cur;
1636
1637 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1638 nl80211_free(req);
1639 }
1640
1641 if (dbm_max > 0)
1642 {
1643 for (dbm_cur = 0, dbm_cnt = 0;
1644 dbm_cur < dbm_max;
1645 dbm_cur++, dbm_cnt++)
1646 {
1647 entry.dbm = dbm_cur;
1648 entry.mw = iwinfo_dbm2mw(dbm_cur);
1649
1650 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1651 }
1652
1653 entry.dbm = dbm_max;
1654 entry.mw = iwinfo_dbm2mw(dbm_max);
1655
1656 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1657 dbm_cnt++;
1658
1659 *len = dbm_cnt * sizeof(entry);
1660 return 0;
1661 }
1662
1663 return -1;
1664 }
1665
1666 static void nl80211_get_scancrypto(const char *spec,
1667 struct iwinfo_crypto_entry *c)
1668 {
1669 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1670 {
1671 c->enabled = 1;
1672
1673 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1674 c->wpa_version = 3;
1675
1676 else if (strstr(spec, "WPA2"))
1677 c->wpa_version = 2;
1678
1679 else if (strstr(spec, "WPA"))
1680 c->wpa_version = 1;
1681
1682 else if (strstr(spec, "WEP"))
1683 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1684
1685
1686 if (strstr(spec, "PSK"))
1687 c->auth_suites |= IWINFO_KMGMT_PSK;
1688
1689 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1690 c->auth_suites |= IWINFO_KMGMT_8021x;
1691
1692 if (strstr(spec, "WPA-NONE"))
1693 c->auth_suites |= IWINFO_KMGMT_NONE;
1694
1695
1696 if (strstr(spec, "TKIP"))
1697 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1698
1699 if (strstr(spec, "CCMP"))
1700 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1701
1702 if (strstr(spec, "WEP-40"))
1703 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1704
1705 if (strstr(spec, "WEP-104"))
1706 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1707
1708 c->group_ciphers = c->pair_ciphers;
1709 }
1710 else
1711 {
1712 c->enabled = 0;
1713 }
1714 }
1715
1716
1717 struct nl80211_scanlist {
1718 struct iwinfo_scanlist_entry *e;
1719 int len;
1720 };
1721
1722
1723 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1724 struct iwinfo_scanlist_entry *e)
1725 {
1726 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1727 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1728 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1729
1730 while (ielen >= 2 && ielen >= ie[1])
1731 {
1732 switch (ie[0])
1733 {
1734 case 0: /* SSID */
1735 memcpy(e->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1736 break;
1737
1738 case 48: /* RSN */
1739 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1740 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1741 break;
1742
1743 case 221: /* Vendor */
1744 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1745 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1746 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1747 break;
1748 }
1749
1750 ielen -= ie[1] + 2;
1751 ie += ie[1] + 2;
1752 }
1753 }
1754
1755 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
1756 {
1757 int8_t rssi;
1758 uint16_t caps;
1759
1760 struct nl80211_scanlist *sl = arg;
1761 struct nlattr **tb = nl80211_parse(msg);
1762 struct nlattr *bss[NL80211_BSS_MAX + 1];
1763
1764 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1765 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1766 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1767 [NL80211_BSS_BSSID] = { },
1768 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1769 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1770 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
1771 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1772 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1773 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1774 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1775 [NL80211_BSS_BEACON_IES] = { },
1776 };
1777
1778 if (!tb[NL80211_ATTR_BSS] ||
1779 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1780 bss_policy) ||
1781 !bss[NL80211_BSS_BSSID])
1782 {
1783 return NL_SKIP;
1784 }
1785
1786 if (bss[NL80211_BSS_CAPABILITY])
1787 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1788 else
1789 caps = 0;
1790
1791 memset(sl->e, 0, sizeof(*sl->e));
1792 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
1793
1794 if (caps & (1<<1))
1795 sl->e->mode = IWINFO_OPMODE_ADHOC;
1796 else if (caps & (1<<0))
1797 sl->e->mode = IWINFO_OPMODE_MASTER;
1798 else
1799 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
1800
1801 if (caps & (1<<4))
1802 sl->e->crypto.enabled = 1;
1803
1804 if (bss[NL80211_BSS_FREQUENCY])
1805 sl->e->channel = nl80211_freq2channel(nla_get_u32(
1806 bss[NL80211_BSS_FREQUENCY]));
1807
1808 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
1809 nl80211_get_scanlist_ie(bss, sl->e);
1810
1811 if (bss[NL80211_BSS_SIGNAL_MBM])
1812 {
1813 sl->e->signal =
1814 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
1815
1816 rssi = sl->e->signal - 0x100;
1817
1818 if (rssi < -110)
1819 rssi = -110;
1820 else if (rssi > -40)
1821 rssi = -40;
1822
1823 sl->e->quality = (rssi + 110);
1824 sl->e->quality_max = 70;
1825 }
1826
1827 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
1828 {
1829 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1830 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
1831 }
1832
1833 sl->e++;
1834 sl->len++;
1835
1836 return NL_SKIP;
1837 }
1838
1839 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
1840 {
1841 struct nl80211_msg_conveyor *req;
1842 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
1843
1844 req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
1845 if (req)
1846 {
1847 nl80211_send(req, NULL, NULL);
1848 nl80211_free(req);
1849 }
1850
1851 nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
1852
1853 req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1854 if (req)
1855 {
1856 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
1857 nl80211_free(req);
1858 }
1859
1860 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
1861 return *len ? 0 : -1;
1862 }
1863
1864 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1865 {
1866 int freq, rssi, qmax, count;
1867 char *res;
1868 char ssid[128] = { 0 };
1869 char bssid[18] = { 0 };
1870 char cipher[256] = { 0 };
1871
1872 /* Got a radioX pseudo interface, find some interface on it or create one */
1873 if (!strncmp(ifname, "radio", 5))
1874 {
1875 /* Reuse existing interface */
1876 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1877 {
1878 return nl80211_get_scanlist(res, buf, len);
1879 }
1880
1881 /* Need to spawn a temporary iface for scanning */
1882 else if ((res = nl80211_ifadd(ifname)) != NULL)
1883 {
1884 count = nl80211_get_scanlist(res, buf, len);
1885 nl80211_ifdel(res);
1886 return count;
1887 }
1888 }
1889
1890 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1891
1892 /* WPA supplicant */
1893 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1894 {
1895 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1896 {
1897 nl80211_get_quality_max(ifname, &qmax);
1898
1899 count = -1;
1900
1901 do {
1902 if (res[0] == '<')
1903 {
1904 /* skip log lines */
1905 goto nextline;
1906 }
1907 if (count < 0)
1908 {
1909 /* skip header line */
1910 count++;
1911 goto nextline;
1912 }
1913 if (sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1914 bssid, &freq, &rssi, cipher, ssid) < 5)
1915 {
1916 /* skip malformed lines */
1917 goto nextline;
1918 }
1919 /* BSSID */
1920 e->mac[0] = strtol(&bssid[0], NULL, 16);
1921 e->mac[1] = strtol(&bssid[3], NULL, 16);
1922 e->mac[2] = strtol(&bssid[6], NULL, 16);
1923 e->mac[3] = strtol(&bssid[9], NULL, 16);
1924 e->mac[4] = strtol(&bssid[12], NULL, 16);
1925 e->mac[5] = strtol(&bssid[15], NULL, 16);
1926
1927 /* SSID */
1928 memcpy(e->ssid, ssid, min(strlen(ssid), sizeof(e->ssid) - 1));
1929
1930 /* Mode (assume master) */
1931 if (strstr(cipher,"[MESH]"))
1932 e->mode = IWINFO_OPMODE_MESHPOINT;
1933 else
1934 e->mode = IWINFO_OPMODE_MASTER;
1935
1936 /* Channel */
1937 e->channel = nl80211_freq2channel(freq);
1938
1939 /* Signal */
1940 e->signal = rssi;
1941
1942 /* Quality */
1943 if (rssi < 0)
1944 {
1945 /* The cfg80211 wext compat layer assumes a signal range
1946 * of -110 dBm to -40 dBm, the quality value is derived
1947 * by adding 110 to the signal level */
1948 if (rssi < -110)
1949 rssi = -110;
1950 else if (rssi > -40)
1951 rssi = -40;
1952
1953 e->quality = (rssi + 110);
1954 }
1955 else
1956 {
1957 e->quality = rssi;
1958 }
1959
1960 /* Max. Quality */
1961 e->quality_max = qmax;
1962
1963 /* Crypto */
1964 nl80211_get_scancrypto(cipher, &e->crypto);
1965
1966 count++;
1967 e++;
1968
1969 memset(ssid, 0, sizeof(ssid));
1970 memset(bssid, 0, sizeof(bssid));
1971 memset(cipher, 0, sizeof(cipher));
1972
1973 nextline:
1974 /* advance to next line */
1975 while( *res && *res++ != '\n' );
1976 }
1977 while( *res );
1978
1979 *len = count * sizeof(struct iwinfo_scanlist_entry);
1980 return 0;
1981 }
1982 }
1983
1984 /* AP scan */
1985 else
1986 {
1987 /* Got a temp interface, don't create yet another one */
1988 if (!strncmp(ifname, "tmp.", 4))
1989 {
1990 if (!iwinfo_ifup(ifname))
1991 return -1;
1992
1993 nl80211_get_scanlist_nl(ifname, buf, len);
1994 iwinfo_ifdown(ifname);
1995 return 0;
1996 }
1997
1998 /* Spawn a new scan interface */
1999 else
2000 {
2001 if (!(res = nl80211_ifadd(ifname)))
2002 goto out;
2003
2004 if (!iwinfo_ifmac(res))
2005 goto out;
2006
2007 /* if we can take the new interface up, the driver supports an
2008 * additional interface and there's no need to tear down the ap */
2009 if (iwinfo_ifup(res))
2010 {
2011 nl80211_get_scanlist_nl(res, buf, len);
2012 iwinfo_ifdown(res);
2013 }
2014
2015 /* driver cannot create secondary interface, take down ap
2016 * during scan */
2017 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2018 {
2019 nl80211_get_scanlist_nl(res, buf, len);
2020 iwinfo_ifdown(res);
2021 iwinfo_ifup(ifname);
2022 nl80211_hostapd_hup(ifname);
2023 }
2024
2025 out:
2026 nl80211_ifdel(res);
2027 return 0;
2028 }
2029 }
2030
2031 return -1;
2032 }
2033
2034 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2035 {
2036 int bands_remain, freqs_remain;
2037
2038 struct nl80211_array_buf *arr = arg;
2039 struct iwinfo_freqlist_entry *e = arr->buf;
2040
2041 struct nlattr **attr = nl80211_parse(msg);
2042 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2043 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2044 struct nlattr *band, *freq;
2045
2046 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2047 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2048 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2049 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2050 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2051 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2052 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2053 };
2054
2055 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2056 {
2057 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2058 nla_data(band), nla_len(band), NULL);
2059
2060 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2061 {
2062 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2063 nla_data(freq), nla_len(freq), NULL);
2064
2065 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2066 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2067 continue;
2068
2069 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2070 e->channel = nl80211_freq2channel(e->mhz);
2071
2072 e->restricted = (
2073 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
2074 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
2075 freqs[NL80211_FREQUENCY_ATTR_RADAR]
2076 ) ? 1 : 0;
2077
2078 e++;
2079 arr->count++;
2080 }
2081 }
2082
2083 return NL_SKIP;
2084 }
2085
2086 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2087 {
2088 struct nl80211_msg_conveyor *req;
2089 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2090
2091 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2092 if (req)
2093 {
2094 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2095 nl80211_free(req);
2096 }
2097
2098 if (arr.count > 0)
2099 {
2100 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2101 return 0;
2102 }
2103
2104 return -1;
2105 }
2106
2107 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2108 {
2109 char *buf = arg;
2110 struct nlattr **attr = nl80211_parse(msg);
2111
2112 if (attr[NL80211_ATTR_REG_ALPHA2])
2113 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2114 else
2115 buf[0] = 0;
2116
2117 return NL_SKIP;
2118 }
2119
2120 int nl80211_get_country(const char *ifname, char *buf)
2121 {
2122 int rv = -1;
2123 struct nl80211_msg_conveyor *req;
2124
2125 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2126 if (req)
2127 {
2128 nl80211_send(req, nl80211_get_country_cb, buf);
2129 nl80211_free(req);
2130
2131 if (buf[0])
2132 rv = 0;
2133 }
2134
2135 return rv;
2136 }
2137
2138 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2139 {
2140 int i, count;
2141 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2142 const struct iwinfo_iso3166_label *l;
2143
2144 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2145 {
2146 e->iso3166 = l->iso3166;
2147 e->ccode[0] = (l->iso3166 / 256);
2148 e->ccode[1] = (l->iso3166 % 256);
2149 }
2150
2151 *len = (count * sizeof(struct iwinfo_country_entry));
2152 return 0;
2153 }
2154
2155 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
2156 {
2157 int *modes = arg;
2158 int bands_remain, freqs_remain;
2159 uint16_t caps = 0;
2160 struct nlattr **attr = nl80211_parse(msg);
2161 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2162 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2163 struct nlattr *band, *freq;
2164
2165 *modes = 0;
2166
2167 if (attr[NL80211_ATTR_WIPHY_BANDS])
2168 {
2169 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2170 {
2171 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2172 nla_data(band), nla_len(band), NULL);
2173
2174 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2175 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2176
2177 /* Treat any nonzero capability as 11n */
2178 if (caps > 0)
2179 *modes |= IWINFO_80211_N;
2180
2181 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2182 freqs_remain)
2183 {
2184 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2185 nla_data(freq), nla_len(freq), NULL);
2186
2187 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2188 continue;
2189
2190 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2191 {
2192 *modes |= IWINFO_80211_B;
2193 *modes |= IWINFO_80211_G;
2194 }
2195 else
2196 {
2197 *modes |= IWINFO_80211_A;
2198 }
2199 }
2200 }
2201 }
2202
2203 return NL_SKIP;
2204 }
2205
2206 int nl80211_get_hwmodelist(const char *ifname, int *buf)
2207 {
2208 struct nl80211_msg_conveyor *req;
2209
2210 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2211 if (req)
2212 {
2213 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
2214 nl80211_free(req);
2215 }
2216
2217 return *buf ? 0 : -1;
2218 }
2219
2220 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
2221 {
2222 struct nlattr **attr = nl80211_parse(msg);
2223 struct nlattr *comb;
2224 int *ret = arg;
2225 int comb_rem, limit_rem, mode_rem;
2226
2227 *ret = 0;
2228 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
2229 return NL_SKIP;
2230
2231 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
2232 {
2233 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
2234 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
2235 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
2236 };
2237 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB];
2238 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
2239 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
2240 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
2241 };
2242 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT];
2243 struct nlattr *limit;
2244
2245 nla_parse_nested(tb_comb, NL80211_BAND_ATTR_MAX, comb, iface_combination_policy);
2246
2247 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
2248 continue;
2249
2250 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
2251 {
2252 struct nlattr *mode;
2253
2254 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
2255
2256 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
2257 !tb_limit[NL80211_IFACE_LIMIT_MAX])
2258 continue;
2259
2260 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
2261 continue;
2262
2263 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
2264 if (nla_type(mode) == NL80211_IFTYPE_AP)
2265 *ret = 1;
2266 }
2267 }
2268 }
2269
2270 return NL_SKIP;
2271 }
2272
2273 int nl80211_get_mbssid_support(const char *ifname, int *buf)
2274 {
2275 struct nl80211_msg_conveyor *req;
2276
2277 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2278 if (!req)
2279 return -1;
2280
2281 nl80211_send(req, nl80211_get_ifcomb_cb, buf);
2282 nl80211_free(req);
2283 return 0;
2284 }
2285
2286 int nl80211_get_hardware_id(const char *ifname, char *buf)
2287 {
2288 int rv;
2289 char *res;
2290
2291 /* Got a radioX pseudo interface, find some interface on it or create one */
2292 if (!strncmp(ifname, "radio", 5))
2293 {
2294 /* Reuse existing interface */
2295 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2296 {
2297 rv = wext_ops.hardware_id(res, buf);
2298 }
2299
2300 /* Need to spawn a temporary iface for finding IDs */
2301 else if ((res = nl80211_ifadd(ifname)) != NULL)
2302 {
2303 rv = wext_ops.hardware_id(res, buf);
2304 nl80211_ifdel(res);
2305 }
2306 }
2307 else
2308 {
2309 rv = wext_ops.hardware_id(ifname, buf);
2310 }
2311
2312 /* Failed to obtain hardware IDs, search board config */
2313 if (rv)
2314 {
2315 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2316 }
2317
2318 return rv;
2319 }
2320
2321 static const struct iwinfo_hardware_entry *
2322 nl80211_get_hardware_entry(const char *ifname)
2323 {
2324 struct iwinfo_hardware_id id;
2325
2326 if (nl80211_get_hardware_id(ifname, (char *)&id))
2327 return NULL;
2328
2329 return iwinfo_hardware(&id);
2330 }
2331
2332 int nl80211_get_hardware_name(const char *ifname, char *buf)
2333 {
2334 const struct iwinfo_hardware_entry *hw;
2335
2336 if (!(hw = nl80211_get_hardware_entry(ifname)))
2337 sprintf(buf, "Generic MAC80211");
2338 else
2339 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2340
2341 return 0;
2342 }
2343
2344 int nl80211_get_txpower_offset(const char *ifname, int *buf)
2345 {
2346 const struct iwinfo_hardware_entry *hw;
2347
2348 if (!(hw = nl80211_get_hardware_entry(ifname)))
2349 return -1;
2350
2351 *buf = hw->txpower_offset;
2352 return 0;
2353 }
2354
2355 int nl80211_get_frequency_offset(const char *ifname, int *buf)
2356 {
2357 const struct iwinfo_hardware_entry *hw;
2358
2359 if (!(hw = nl80211_get_hardware_entry(ifname)))
2360 return -1;
2361
2362 *buf = hw->frequency_offset;
2363 return 0;
2364 }
OpenWrt Source Repository