iwinfo: when using nl80211, parse interface combinations instead of creating/deleting...
[openwrt/svn-archive/archive.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)-1) <= 0)
544 goto out;
545 }
546
547
548 send(sock, cmd, strlen(cmd), 0);
549
550 /* we might have to scan up to 72 channels / 256ms per channel */
551 /* this makes up to 18.5s hence 10 tries */
552 while( numtry++ < 10 )
553 {
554 char *bracket;
555
556 /* make sure there is a terminating nul byte */
557 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
558 {
559 if (event)
560 continue;
561
562 break;
563 }
564
565 if ((!event && buffer[0] != '<') || (event && strstr(buffer, event)))
566 break;
567
568 /* there may be more than max(numtry) BSS-ADDED events */
569 /* ignore them similar to wpa_cli */
570 if (buffer[0] == '<' &&
571 (bracket=strchr(buffer,'>')) != NULL &&
572 strncmp(bracket+1,"CTRL-EVENT-BSS-ADDED",20) == 0)
573 numtry--;
574 }
575
576 rv = buffer;
577
578 out:
579 close(sock);
580
581 if (local.sun_family)
582 unlink(local.sun_path);
583
584 return rv;
585 }
586
587 static inline int nl80211_readint(const char *path)
588 {
589 int fd;
590 int rv = -1;
591 char buffer[16];
592
593 if ((fd = open(path, O_RDONLY)) > -1)
594 {
595 if (read(fd, buffer, sizeof(buffer)) > 0)
596 rv = atoi(buffer);
597
598 close(fd);
599 }
600
601 return rv;
602 }
603
604 static char * nl80211_phy2ifname(const char *ifname)
605 {
606 int fd, ifidx = -1, cifidx = -1, phyidx = -1;
607 char buffer[64];
608 static char nif[IFNAMSIZ] = { 0 };
609
610 DIR *d;
611 struct dirent *e;
612
613 if (!ifname)
614 return NULL;
615 else if (!strncmp(ifname, "phy", 3))
616 phyidx = atoi(&ifname[3]);
617 else if (!strncmp(ifname, "radio", 5))
618 phyidx = atoi(&ifname[5]);
619
620 memset(nif, 0, sizeof(nif));
621
622 if (phyidx > -1)
623 {
624 if ((d = opendir("/sys/class/net")) != NULL)
625 {
626 while ((e = readdir(d)) != NULL)
627 {
628 snprintf(buffer, sizeof(buffer),
629 "/sys/class/net/%s/phy80211/index", e->d_name);
630
631 if (nl80211_readint(buffer) == phyidx)
632 {
633 snprintf(buffer, sizeof(buffer),
634 "/sys/class/net/%s/ifindex", e->d_name);
635
636 if ((cifidx = nl80211_readint(buffer)) >= 0 &&
637 ((ifidx < 0) || (cifidx < ifidx)))
638 {
639 ifidx = cifidx;
640 strncpy(nif, e->d_name, sizeof(nif));
641 }
642 }
643 }
644
645 closedir(d);
646 }
647 }
648
649 return nif[0] ? nif : NULL;
650 }
651
652 static char * nl80211_ifadd(const char *ifname)
653 {
654 int phyidx;
655 char *rv = NULL;
656 static char nif[IFNAMSIZ] = { 0 };
657 struct nl80211_msg_conveyor *req, *res;
658
659 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
660 if (req)
661 {
662 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
663
664 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
665 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
666
667 nl80211_send(req, NULL, NULL);
668
669 rv = nif;
670
671 nla_put_failure:
672 nl80211_free(req);
673 }
674
675 return rv;
676 }
677
678 static void nl80211_ifdel(const char *ifname)
679 {
680 struct nl80211_msg_conveyor *req;
681
682 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
683 if (req)
684 {
685 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
686
687 nl80211_send(req, NULL, NULL);
688
689 nla_put_failure:
690 nl80211_free(req);
691 }
692 }
693
694 static void nl80211_hostapd_hup(const char *ifname)
695 {
696 int fd, pid = 0;
697 char buf[32];
698 char *phy = nl80211_ifname2phy(ifname);
699
700 if (phy)
701 {
702 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
703 if ((fd = open(buf, O_RDONLY)) > 0)
704 {
705 if (read(fd, buf, sizeof(buf)) > 0)
706 pid = atoi(buf);
707
708 close(fd);
709 }
710
711 if (pid > 0)
712 kill(pid, 1);
713 }
714 }
715
716
717 int nl80211_probe(const char *ifname)
718 {
719 return !!nl80211_ifname2phy(ifname);
720 }
721
722 void nl80211_close(void)
723 {
724 if (nls)
725 {
726 if (nls->nlctrl)
727 genl_family_put(nls->nlctrl);
728
729 if (nls->nl80211)
730 genl_family_put(nls->nl80211);
731
732 if (nls->nl_sock)
733 nl_socket_free(nls->nl_sock);
734
735 if (nls->nl_cache)
736 nl_cache_free(nls->nl_cache);
737
738 free(nls);
739 nls = NULL;
740 }
741 }
742
743
744 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
745 {
746 int *mode = arg;
747 struct nlattr **tb = nl80211_parse(msg);
748 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
749 IWINFO_OPMODE_UNKNOWN, /* unspecified */
750 IWINFO_OPMODE_ADHOC, /* IBSS */
751 IWINFO_OPMODE_CLIENT, /* managed */
752 IWINFO_OPMODE_MASTER, /* AP */
753 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
754 IWINFO_OPMODE_WDS, /* WDS */
755 IWINFO_OPMODE_MONITOR, /* monitor */
756 IWINFO_OPMODE_MESHPOINT, /* mesh point */
757 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
758 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
759 };
760
761 if (tb[NL80211_ATTR_IFTYPE])
762 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
763
764 return NL_SKIP;
765 }
766
767 int nl80211_get_mode(const char *ifname, int *buf)
768 {
769 char *res;
770 struct nl80211_msg_conveyor *req;
771
772 res = nl80211_phy2ifname(ifname);
773 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
774 *buf = IWINFO_OPMODE_UNKNOWN;
775
776 if (req)
777 {
778 nl80211_send(req, nl80211_get_mode_cb, buf);
779 nl80211_free(req);
780 }
781
782 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
783 }
784
785
786 struct nl80211_ssid_bssid {
787 unsigned char *ssid;
788 unsigned char bssid[7];
789 };
790
791 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
792 {
793 int ielen;
794 unsigned char *ie;
795 struct nl80211_ssid_bssid *sb = arg;
796 struct nlattr **tb = nl80211_parse(msg);
797 struct nlattr *bss[NL80211_BSS_MAX + 1];
798
799 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
800 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
801 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
802 };
803
804 if (!tb[NL80211_ATTR_BSS] ||
805 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
806 bss_policy) ||
807 !bss[NL80211_BSS_BSSID] ||
808 !bss[NL80211_BSS_STATUS] ||
809 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
810 {
811 return NL_SKIP;
812 }
813
814 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
815 {
816 case NL80211_BSS_STATUS_ASSOCIATED:
817 case NL80211_BSS_STATUS_AUTHENTICATED:
818 case NL80211_BSS_STATUS_IBSS_JOINED:
819
820 if (sb->ssid)
821 {
822 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
823 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
824
825 while (ielen >= 2 && ielen >= ie[1])
826 {
827 if (ie[0] == 0)
828 {
829 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
830 return NL_SKIP;
831 }
832
833 ielen -= ie[1] + 2;
834 ie += ie[1] + 2;
835 }
836 }
837 else
838 {
839 sb->bssid[0] = 1;
840 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
841 return NL_SKIP;
842 }
843
844 default:
845 return NL_SKIP;
846 }
847 }
848
849 int nl80211_get_ssid(const char *ifname, char *buf)
850 {
851 char *res;
852 struct nl80211_msg_conveyor *req;
853 struct nl80211_ssid_bssid sb;
854
855 /* try to find ssid from scan dump results */
856 res = nl80211_phy2ifname(ifname);
857 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
858
859 sb.ssid = buf;
860 *buf = 0;
861
862 if (req)
863 {
864 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
865 nl80211_free(req);
866 }
867
868 /* failed, try to find from hostapd info */
869 if ((*buf == 0) &&
870 (res = nl80211_hostapd_info(ifname)) &&
871 (res = nl80211_getval(ifname, res, "ssid")))
872 {
873 memcpy(buf, res, strlen(res));
874 }
875
876 return (*buf == 0) ? -1 : 0;
877 }
878
879 int nl80211_get_bssid(const char *ifname, char *buf)
880 {
881 char *res;
882 struct nl80211_msg_conveyor *req;
883 struct nl80211_ssid_bssid sb;
884
885 /* try to find bssid from scan dump results */
886 res = nl80211_phy2ifname(ifname);
887 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
888
889 sb.ssid = NULL;
890 sb.bssid[0] = 0;
891
892 if (req)
893 {
894 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
895 nl80211_free(req);
896 }
897
898 /* failed, try to find mac from hostapd info */
899 if ((sb.bssid[0] == 0) &&
900 (res = nl80211_hostapd_info(ifname)) &&
901 (res = nl80211_getval(ifname, res, "bssid")))
902 {
903 sb.bssid[0] = 1;
904 sb.bssid[1] = strtol(&res[0], NULL, 16);
905 sb.bssid[2] = strtol(&res[3], NULL, 16);
906 sb.bssid[3] = strtol(&res[6], NULL, 16);
907 sb.bssid[4] = strtol(&res[9], NULL, 16);
908 sb.bssid[5] = strtol(&res[12], NULL, 16);
909 sb.bssid[6] = strtol(&res[15], NULL, 16);
910 }
911
912 if (sb.bssid[0])
913 {
914 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
915 sb.bssid[1], sb.bssid[2], sb.bssid[3],
916 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
917
918 return 0;
919 }
920
921 return -1;
922 }
923
924
925 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
926 {
927 int *freq = arg;
928 struct nlattr **attr = nl80211_parse(msg);
929 struct nlattr *binfo[NL80211_BSS_MAX + 1];
930
931 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
932 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
933 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
934 };
935
936 if (attr[NL80211_ATTR_BSS] &&
937 !nla_parse_nested(binfo, NL80211_BSS_MAX,
938 attr[NL80211_ATTR_BSS], bss_policy))
939 {
940 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
941 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
942 }
943
944 return NL_SKIP;
945 }
946
947 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
948 {
949 int *freq = arg;
950 struct nlattr **tb = nl80211_parse(msg);
951
952 if (tb[NL80211_ATTR_WIPHY_FREQ])
953 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
954
955 return NL_SKIP;
956 }
957
958 int nl80211_get_frequency(const char *ifname, int *buf)
959 {
960 int chn;
961 char *res, *channel;
962 struct nl80211_msg_conveyor *req;
963
964 /* try to find frequency from interface info */
965 res = nl80211_phy2ifname(ifname);
966 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
967 *buf = 0;
968
969 if (req)
970 {
971 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
972 nl80211_free(req);
973 }
974
975 /* failed, try to find frequency from hostapd info */
976 if ((*buf == 0) &&
977 (res = nl80211_hostapd_info(ifname)) &&
978 (channel = nl80211_getval(NULL, res, "channel")))
979 {
980 chn = atoi(channel);
981 *buf = nl80211_channel2freq(chn, nl80211_getval(NULL, res, "hw_mode"));
982 }
983 else
984 {
985 /* failed, try to find frequency from scan results */
986 if (*buf == 0)
987 {
988 res = nl80211_phy2ifname(ifname);
989 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN,
990 NLM_F_DUMP);
991
992 if (req)
993 {
994 nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
995 nl80211_free(req);
996 }
997 }
998 }
999
1000 return (*buf == 0) ? -1 : 0;
1001 }
1002
1003 int nl80211_get_channel(const char *ifname, int *buf)
1004 {
1005 if (!nl80211_get_frequency(ifname, buf))
1006 {
1007 *buf = nl80211_freq2channel(*buf);
1008 return 0;
1009 }
1010
1011 return -1;
1012 }
1013
1014
1015 int nl80211_get_txpower(const char *ifname, int *buf)
1016 {
1017 #if 0
1018 char *res;
1019 char path[PATH_MAX];
1020
1021 res = nl80211_ifname2phy(ifname);
1022 snprintf(path, sizeof(path), "/sys/kernel/debug/ieee80211/%s/power",
1023 res ? res : ifname);
1024
1025 if ((*buf = nl80211_readint(path)) > -1)
1026 return 0;
1027 #endif
1028
1029 return wext_get_txpower(ifname, buf);
1030 }
1031
1032
1033 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1034 {
1035 int8_t dbm;
1036 int16_t mbit;
1037 struct nl80211_rssi_rate *rr = arg;
1038 struct nlattr **attr = nl80211_parse(msg);
1039 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1040 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1041
1042 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1043 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1044 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1045 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1046 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1047 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1048 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1049 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1050 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1051 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1052 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1053 };
1054
1055 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1056 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1057 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1058 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1059 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1060 };
1061
1062 if (attr[NL80211_ATTR_STA_INFO])
1063 {
1064 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1065 attr[NL80211_ATTR_STA_INFO], stats_policy))
1066 {
1067 if (sinfo[NL80211_STA_INFO_SIGNAL])
1068 {
1069 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1070 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1071 }
1072
1073 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1074 {
1075 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1076 sinfo[NL80211_STA_INFO_TX_BITRATE],
1077 rate_policy))
1078 {
1079 if (rinfo[NL80211_RATE_INFO_BITRATE])
1080 {
1081 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1082 rr->rate = rr->rate
1083 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1084 }
1085 }
1086 }
1087 }
1088 }
1089
1090 return NL_SKIP;
1091 }
1092
1093 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1094 {
1095 DIR *d;
1096 struct dirent *de;
1097 struct nl80211_msg_conveyor *req;
1098
1099 r->rssi = 0;
1100 r->rate = 0;
1101
1102 if ((d = opendir("/sys/class/net")) != NULL)
1103 {
1104 while ((de = readdir(d)) != NULL)
1105 {
1106 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1107 (!de->d_name[strlen(ifname)] ||
1108 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1109 {
1110 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1111 NLM_F_DUMP);
1112
1113 if (req)
1114 {
1115 nl80211_send(req, nl80211_fill_signal_cb, r);
1116 nl80211_free(req);
1117 }
1118 }
1119 }
1120
1121 closedir(d);
1122 }
1123 }
1124
1125 int nl80211_get_bitrate(const char *ifname, int *buf)
1126 {
1127 struct nl80211_rssi_rate rr;
1128
1129 nl80211_fill_signal(ifname, &rr);
1130
1131 if (rr.rate)
1132 {
1133 *buf = (rr.rate * 100);
1134 return 0;
1135 }
1136
1137 return -1;
1138 }
1139
1140 int nl80211_get_signal(const char *ifname, int *buf)
1141 {
1142 struct nl80211_rssi_rate rr;
1143
1144 nl80211_fill_signal(ifname, &rr);
1145
1146 if (rr.rssi)
1147 {
1148 *buf = rr.rssi;
1149 return 0;
1150 }
1151
1152 return -1;
1153 }
1154
1155 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1156 {
1157 int8_t *noise = arg;
1158 struct nlattr **tb = nl80211_parse(msg);
1159 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1160
1161 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1162 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1163 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1164 };
1165
1166 if (!tb[NL80211_ATTR_SURVEY_INFO])
1167 return NL_SKIP;
1168
1169 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1170 tb[NL80211_ATTR_SURVEY_INFO], sp))
1171 return NL_SKIP;
1172
1173 if (!si[NL80211_SURVEY_INFO_NOISE])
1174 return NL_SKIP;
1175
1176 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1177 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1178
1179 return NL_SKIP;
1180 }
1181
1182
1183 int nl80211_get_noise(const char *ifname, int *buf)
1184 {
1185 int8_t noise;
1186 struct nl80211_msg_conveyor *req;
1187
1188 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1189 if (req)
1190 {
1191 noise = 0;
1192
1193 nl80211_send(req, nl80211_get_noise_cb, &noise);
1194 nl80211_free(req);
1195
1196 if (noise)
1197 {
1198 *buf = noise;
1199 return 0;
1200 }
1201 }
1202
1203 return -1;
1204 }
1205
1206 int nl80211_get_quality(const char *ifname, int *buf)
1207 {
1208 int signal;
1209
1210 if (!nl80211_get_signal(ifname, &signal))
1211 {
1212 /* A positive signal level is usually just a quality
1213 * value, pass through as-is */
1214 if (signal >= 0)
1215 {
1216 *buf = signal;
1217 }
1218
1219 /* The cfg80211 wext compat layer assumes a signal range
1220 * of -110 dBm to -40 dBm, the quality value is derived
1221 * by adding 110 to the signal level */
1222 else
1223 {
1224 if (signal < -110)
1225 signal = -110;
1226 else if (signal > -40)
1227 signal = -40;
1228
1229 *buf = (signal + 110);
1230 }
1231
1232 return 0;
1233 }
1234
1235 return -1;
1236 }
1237
1238 int nl80211_get_quality_max(const char *ifname, int *buf)
1239 {
1240 /* The cfg80211 wext compat layer assumes a maximum
1241 * quality of 70 */
1242 *buf = 70;
1243
1244 return 0;
1245 }
1246
1247 int nl80211_get_encryption(const char *ifname, char *buf)
1248 {
1249 int i;
1250 char k[9];
1251 char *val, *res;
1252 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1253
1254 /* WPA supplicant */
1255 if ((res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
1256 (val = nl80211_getval(NULL, res, "pairwise_cipher")))
1257 {
1258 /* WEP */
1259 if (strstr(val, "WEP"))
1260 {
1261 if (strstr(val, "WEP-40"))
1262 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1263
1264 else if (strstr(val, "WEP-104"))
1265 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1266
1267 c->enabled = 1;
1268 c->group_ciphers = c->pair_ciphers;
1269
1270 c->auth_suites |= IWINFO_KMGMT_NONE;
1271 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1272 }
1273
1274 /* WPA */
1275 else
1276 {
1277 if (strstr(val, "TKIP"))
1278 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1279
1280 else if (strstr(val, "CCMP"))
1281 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1282
1283 else if (strstr(val, "NONE"))
1284 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1285
1286 else if (strstr(val, "WEP-40"))
1287 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1288
1289 else if (strstr(val, "WEP-104"))
1290 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1291
1292
1293 if ((val = nl80211_getval(NULL, res, "group_cipher")))
1294 {
1295 if (strstr(val, "TKIP"))
1296 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1297
1298 else if (strstr(val, "CCMP"))
1299 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1300
1301 else if (strstr(val, "NONE"))
1302 c->group_ciphers |= IWINFO_CIPHER_NONE;
1303
1304 else if (strstr(val, "WEP-40"))
1305 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1306
1307 else if (strstr(val, "WEP-104"))
1308 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1309 }
1310
1311
1312 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
1313 {
1314 if (strstr(val, "WPA2"))
1315 c->wpa_version = 2;
1316
1317 else if (strstr(val, "WPA"))
1318 c->wpa_version = 1;
1319
1320
1321 if (strstr(val, "PSK"))
1322 c->auth_suites |= IWINFO_KMGMT_PSK;
1323
1324 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
1325 c->auth_suites |= IWINFO_KMGMT_8021x;
1326
1327 else if (strstr(val, "NONE"))
1328 c->auth_suites |= IWINFO_KMGMT_NONE;
1329 }
1330
1331 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1332 }
1333
1334 return 0;
1335 }
1336
1337 /* Hostapd */
1338 else if ((res = nl80211_hostapd_info(ifname)))
1339 {
1340 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
1341 c->wpa_version = atoi(val);
1342
1343 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
1344
1345 if (!val || strstr(val, "PSK"))
1346 c->auth_suites |= IWINFO_KMGMT_PSK;
1347
1348 if (val && strstr(val, "EAP"))
1349 c->auth_suites |= IWINFO_KMGMT_8021x;
1350
1351 if (val && strstr(val, "NONE"))
1352 c->auth_suites |= IWINFO_KMGMT_NONE;
1353
1354 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
1355 {
1356 if (strstr(val, "TKIP"))
1357 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1358
1359 if (strstr(val, "CCMP"))
1360 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1361
1362 if (strstr(val, "NONE"))
1363 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1364 }
1365
1366 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1367 {
1368 switch(atoi(val)) {
1369 case 1:
1370 c->auth_algs |= IWINFO_AUTH_OPEN;
1371 break;
1372
1373 case 2:
1374 c->auth_algs |= IWINFO_AUTH_SHARED;
1375 break;
1376
1377 case 3:
1378 c->auth_algs |= IWINFO_AUTH_OPEN;
1379 c->auth_algs |= IWINFO_AUTH_SHARED;
1380 break;
1381
1382 default:
1383 break;
1384 }
1385
1386 for (i = 0; i < 4; i++)
1387 {
1388 snprintf(k, sizeof(k), "wep_key%d", i);
1389
1390 if ((val = nl80211_getval(ifname, res, k)))
1391 {
1392 if ((strlen(val) == 5) || (strlen(val) == 10))
1393 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1394
1395 else if ((strlen(val) == 13) || (strlen(val) == 26))
1396 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1397 }
1398 }
1399 }
1400
1401 c->group_ciphers = c->pair_ciphers;
1402 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1403
1404 return 0;
1405 }
1406
1407 return -1;
1408 }
1409
1410 int nl80211_get_phyname(const char *ifname, char *buf)
1411 {
1412 const char *name;
1413
1414 name = nl80211_ifname2phy(ifname);
1415
1416 if (name)
1417 {
1418 strcpy(buf, name);
1419 return 0;
1420 }
1421 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1422 {
1423 name = nl80211_ifname2phy(name);
1424
1425 if (name)
1426 {
1427 strcpy(buf, ifname);
1428 return 0;
1429 }
1430 }
1431
1432 return -1;
1433 }
1434
1435
1436 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1437 {
1438 struct nl80211_array_buf *arr = arg;
1439 struct iwinfo_assoclist_entry *e = arr->buf;
1440 struct nlattr **attr = nl80211_parse(msg);
1441 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1442 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1443
1444 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1445 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1446 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1447 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1448 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1449 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1450 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1451 };
1452
1453 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1454 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1455 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1456 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1457 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1458 };
1459
1460 /* advance to end of array */
1461 e += arr->count;
1462 memset(e, 0, sizeof(*e));
1463
1464 if (attr[NL80211_ATTR_MAC])
1465 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1466
1467 if (attr[NL80211_ATTR_STA_INFO] &&
1468 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1469 attr[NL80211_ATTR_STA_INFO], stats_policy))
1470 {
1471 if (sinfo[NL80211_STA_INFO_SIGNAL])
1472 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1473
1474 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1475 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1476
1477 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1478 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1479
1480 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1481 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1482
1483 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1484 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1485 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1486 {
1487 if (rinfo[NL80211_RATE_INFO_BITRATE])
1488 e->rx_rate.rate =
1489 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1490
1491 if (rinfo[NL80211_RATE_INFO_MCS])
1492 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1493
1494 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1495 e->rx_rate.is_40mhz = 1;
1496
1497 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1498 e->rx_rate.is_short_gi = 1;
1499 }
1500
1501 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1502 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1503 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1504 {
1505 if (rinfo[NL80211_RATE_INFO_BITRATE])
1506 e->tx_rate.rate =
1507 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1508
1509 if (rinfo[NL80211_RATE_INFO_MCS])
1510 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1511
1512 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1513 e->tx_rate.is_40mhz = 1;
1514
1515 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1516 e->tx_rate.is_short_gi = 1;
1517 }
1518 }
1519
1520 e->noise = 0; /* filled in by caller */
1521 arr->count++;
1522
1523 return NL_SKIP;
1524 }
1525
1526 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1527 {
1528 DIR *d;
1529 int i, noise = 0;
1530 struct dirent *de;
1531 struct nl80211_msg_conveyor *req;
1532 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1533 struct iwinfo_assoclist_entry *e;
1534
1535 if ((d = opendir("/sys/class/net")) != NULL)
1536 {
1537 while ((de = readdir(d)) != NULL)
1538 {
1539 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1540 (!de->d_name[strlen(ifname)] ||
1541 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1542 {
1543 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1544 NLM_F_DUMP);
1545
1546 if (req)
1547 {
1548 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1549 nl80211_free(req);
1550 }
1551 }
1552 }
1553
1554 closedir(d);
1555
1556 if (!nl80211_get_noise(ifname, &noise))
1557 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1558 e->noise = noise;
1559
1560 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1561 return 0;
1562 }
1563
1564 return -1;
1565 }
1566
1567 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1568 {
1569 int *dbm_max = arg;
1570 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1571
1572 struct nlattr **attr = nl80211_parse(msg);
1573 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1574 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1575 struct nlattr *band, *freq;
1576
1577 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1578 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1579 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1580 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1581 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1582 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1583 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1584 };
1585
1586 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1587 *dbm_max = -1;
1588
1589 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1590 {
1591 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1592 nla_len(band), NULL);
1593
1594 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1595 {
1596 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1597 nla_data(freq), nla_len(freq), freq_policy);
1598
1599 ch_cmp = nl80211_freq2channel(nla_get_u32(
1600 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1601
1602 if ((!ch_cur || (ch_cmp == ch_cur)) &&
1603 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1604 {
1605 *dbm_max = (int)(0.01 * nla_get_u32(
1606 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1607
1608 break;
1609 }
1610 }
1611 }
1612
1613 return NL_SKIP;
1614 }
1615
1616 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1617 {
1618 int ch_cur;
1619 int dbm_max = -1, dbm_cur, dbm_cnt;
1620 struct nl80211_msg_conveyor *req;
1621 struct iwinfo_txpwrlist_entry entry;
1622
1623 if (nl80211_get_channel(ifname, &ch_cur))
1624 ch_cur = 0;
1625
1626 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1627 if (req)
1628 {
1629 /* initialize the value pointer with channel for callback */
1630 dbm_max = ch_cur;
1631
1632 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1633 nl80211_free(req);
1634 }
1635
1636 if (dbm_max > 0)
1637 {
1638 for (dbm_cur = 0, dbm_cnt = 0;
1639 dbm_cur < dbm_max;
1640 dbm_cur++, dbm_cnt++)
1641 {
1642 entry.dbm = dbm_cur;
1643 entry.mw = iwinfo_dbm2mw(dbm_cur);
1644
1645 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1646 }
1647
1648 entry.dbm = dbm_max;
1649 entry.mw = iwinfo_dbm2mw(dbm_max);
1650
1651 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1652 dbm_cnt++;
1653
1654 *len = dbm_cnt * sizeof(entry);
1655 return 0;
1656 }
1657
1658 return -1;
1659 }
1660
1661 static void nl80211_get_scancrypto(const char *spec,
1662 struct iwinfo_crypto_entry *c)
1663 {
1664 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1665 {
1666 c->enabled = 1;
1667
1668 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1669 c->wpa_version = 3;
1670
1671 else if (strstr(spec, "WPA2"))
1672 c->wpa_version = 2;
1673
1674 else if (strstr(spec, "WPA"))
1675 c->wpa_version = 1;
1676
1677 else if (strstr(spec, "WEP"))
1678 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1679
1680
1681 if (strstr(spec, "PSK"))
1682 c->auth_suites |= IWINFO_KMGMT_PSK;
1683
1684 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1685 c->auth_suites |= IWINFO_KMGMT_8021x;
1686
1687 if (strstr(spec, "WPA-NONE"))
1688 c->auth_suites |= IWINFO_KMGMT_NONE;
1689
1690
1691 if (strstr(spec, "TKIP"))
1692 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1693
1694 if (strstr(spec, "CCMP"))
1695 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1696
1697 if (strstr(spec, "WEP-40"))
1698 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1699
1700 if (strstr(spec, "WEP-104"))
1701 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1702
1703 c->group_ciphers = c->pair_ciphers;
1704 }
1705 else
1706 {
1707 c->enabled = 0;
1708 }
1709 }
1710
1711
1712 struct nl80211_scanlist {
1713 struct iwinfo_scanlist_entry *e;
1714 int len;
1715 };
1716
1717
1718 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1719 struct iwinfo_scanlist_entry *e)
1720 {
1721 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1722 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1723 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1724
1725 while (ielen >= 2 && ielen >= ie[1])
1726 {
1727 switch (ie[0])
1728 {
1729 case 0: /* SSID */
1730 memcpy(e->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1731 break;
1732
1733 case 48: /* RSN */
1734 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1735 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1736 break;
1737
1738 case 221: /* Vendor */
1739 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1740 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1741 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1742 break;
1743 }
1744
1745 ielen -= ie[1] + 2;
1746 ie += ie[1] + 2;
1747 }
1748 }
1749
1750 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
1751 {
1752 int8_t rssi;
1753 uint16_t caps;
1754
1755 struct nl80211_scanlist *sl = arg;
1756 struct nlattr **tb = nl80211_parse(msg);
1757 struct nlattr *bss[NL80211_BSS_MAX + 1];
1758
1759 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1760 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1761 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1762 [NL80211_BSS_BSSID] = { },
1763 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1764 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1765 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
1766 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1767 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1768 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1769 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1770 [NL80211_BSS_BEACON_IES] = { },
1771 };
1772
1773 if (!tb[NL80211_ATTR_BSS] ||
1774 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1775 bss_policy) ||
1776 !bss[NL80211_BSS_BSSID])
1777 {
1778 return NL_SKIP;
1779 }
1780
1781 if (bss[NL80211_BSS_CAPABILITY])
1782 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1783 else
1784 caps = 0;
1785
1786 memset(sl->e, 0, sizeof(*sl->e));
1787 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
1788
1789 if (caps & (1<<1))
1790 sl->e->mode = IWINFO_OPMODE_ADHOC;
1791 else if (caps & (1<<0))
1792 sl->e->mode = IWINFO_OPMODE_MASTER;
1793 else
1794 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
1795
1796 if (caps & (1<<4))
1797 sl->e->crypto.enabled = 1;
1798
1799 if (bss[NL80211_BSS_FREQUENCY])
1800 sl->e->channel = nl80211_freq2channel(nla_get_u32(
1801 bss[NL80211_BSS_FREQUENCY]));
1802
1803 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
1804 nl80211_get_scanlist_ie(bss, sl->e);
1805
1806 if (bss[NL80211_BSS_SIGNAL_MBM])
1807 {
1808 sl->e->signal =
1809 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
1810
1811 rssi = sl->e->signal - 0x100;
1812
1813 if (rssi < -110)
1814 rssi = -110;
1815 else if (rssi > -40)
1816 rssi = -40;
1817
1818 sl->e->quality = (rssi + 110);
1819 sl->e->quality_max = 70;
1820 }
1821
1822 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
1823 {
1824 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1825 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
1826 }
1827
1828 sl->e++;
1829 sl->len++;
1830
1831 return NL_SKIP;
1832 }
1833
1834 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
1835 {
1836 struct nl80211_msg_conveyor *req;
1837 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
1838
1839 req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
1840 if (req)
1841 {
1842 nl80211_send(req, NULL, NULL);
1843 nl80211_free(req);
1844 }
1845
1846 nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
1847
1848 req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1849 if (req)
1850 {
1851 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
1852 nl80211_free(req);
1853 }
1854
1855 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
1856 return *len ? 0 : -1;
1857 }
1858
1859 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1860 {
1861 int freq, rssi, qmax, count;
1862 char *res;
1863 char ssid[128] = { 0 };
1864 char bssid[18] = { 0 };
1865 char cipher[256] = { 0 };
1866
1867 /* Got a radioX pseudo interface, find some interface on it or create one */
1868 if (!strncmp(ifname, "radio", 5))
1869 {
1870 /* Reuse existing interface */
1871 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1872 {
1873 return nl80211_get_scanlist(res, buf, len);
1874 }
1875
1876 /* Need to spawn a temporary iface for scanning */
1877 else if ((res = nl80211_ifadd(ifname)) != NULL)
1878 {
1879 count = nl80211_get_scanlist(res, buf, len);
1880 nl80211_ifdel(res);
1881 return count;
1882 }
1883 }
1884
1885 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1886
1887 /* WPA supplicant */
1888 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1889 {
1890 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1891 {
1892 nl80211_get_quality_max(ifname, &qmax);
1893
1894 count = -1;
1895
1896 do {
1897 if (res[0] == '<')
1898 {
1899 /* skip log lines */
1900 goto nextline;
1901 }
1902 if (count < 0)
1903 {
1904 /* skip header line */
1905 count++;
1906 goto nextline;
1907 }
1908 if (sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1909 bssid, &freq, &rssi, cipher, ssid) < 5)
1910 {
1911 /* skip malformed lines */
1912 goto nextline;
1913 }
1914 /* BSSID */
1915 e->mac[0] = strtol(&bssid[0], NULL, 16);
1916 e->mac[1] = strtol(&bssid[3], NULL, 16);
1917 e->mac[2] = strtol(&bssid[6], NULL, 16);
1918 e->mac[3] = strtol(&bssid[9], NULL, 16);
1919 e->mac[4] = strtol(&bssid[12], NULL, 16);
1920 e->mac[5] = strtol(&bssid[15], NULL, 16);
1921
1922 /* SSID */
1923 memcpy(e->ssid, ssid, min(strlen(ssid), sizeof(e->ssid) - 1));
1924
1925 /* Mode (assume master) */
1926 if (strstr(cipher,"[MESH]"))
1927 e->mode = IWINFO_OPMODE_MESHPOINT;
1928 else
1929 e->mode = IWINFO_OPMODE_MASTER;
1930
1931 /* Channel */
1932 e->channel = nl80211_freq2channel(freq);
1933
1934 /* Signal */
1935 e->signal = rssi;
1936
1937 /* Quality */
1938 if (rssi < 0)
1939 {
1940 /* The cfg80211 wext compat layer assumes a signal range
1941 * of -110 dBm to -40 dBm, the quality value is derived
1942 * by adding 110 to the signal level */
1943 if (rssi < -110)
1944 rssi = -110;
1945 else if (rssi > -40)
1946 rssi = -40;
1947
1948 e->quality = (rssi + 110);
1949 }
1950 else
1951 {
1952 e->quality = rssi;
1953 }
1954
1955 /* Max. Quality */
1956 e->quality_max = qmax;
1957
1958 /* Crypto */
1959 nl80211_get_scancrypto(cipher, &e->crypto);
1960
1961 count++;
1962 e++;
1963
1964 memset(ssid, 0, sizeof(ssid));
1965 memset(bssid, 0, sizeof(bssid));
1966 memset(cipher, 0, sizeof(cipher));
1967
1968 nextline:
1969 /* advance to next line */
1970 while( *res && *res++ != '\n' );
1971 }
1972 while( *res );
1973
1974 *len = count * sizeof(struct iwinfo_scanlist_entry);
1975 return 0;
1976 }
1977 }
1978
1979 /* AP scan */
1980 else
1981 {
1982 /* Got a temp interface, don't create yet another one */
1983 if (!strncmp(ifname, "tmp.", 4))
1984 {
1985 if (!iwinfo_ifup(ifname))
1986 return -1;
1987
1988 nl80211_get_scanlist_nl(ifname, buf, len);
1989 iwinfo_ifdown(ifname);
1990 return 0;
1991 }
1992
1993 /* Spawn a new scan interface */
1994 else
1995 {
1996 if (!(res = nl80211_ifadd(ifname)))
1997 goto out;
1998
1999 if (!iwinfo_ifmac(res))
2000 goto out;
2001
2002 /* if we can take the new interface up, the driver supports an
2003 * additional interface and there's no need to tear down the ap */
2004 if (iwinfo_ifup(res))
2005 {
2006 nl80211_get_scanlist_nl(res, buf, len);
2007 iwinfo_ifdown(res);
2008 }
2009
2010 /* driver cannot create secondary interface, take down ap
2011 * during scan */
2012 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2013 {
2014 nl80211_get_scanlist_nl(res, buf, len);
2015 iwinfo_ifdown(res);
2016 iwinfo_ifup(ifname);
2017 nl80211_hostapd_hup(ifname);
2018 }
2019
2020 out:
2021 nl80211_ifdel(res);
2022 return 0;
2023 }
2024 }
2025
2026 return -1;
2027 }
2028
2029 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2030 {
2031 int bands_remain, freqs_remain;
2032
2033 struct nl80211_array_buf *arr = arg;
2034 struct iwinfo_freqlist_entry *e = arr->buf;
2035
2036 struct nlattr **attr = nl80211_parse(msg);
2037 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2038 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2039 struct nlattr *band, *freq;
2040
2041 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2042 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2043 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2044 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2045 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2046 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2047 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2048 };
2049
2050 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2051 {
2052 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2053 nla_data(band), nla_len(band), NULL);
2054
2055 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2056 {
2057 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2058 nla_data(freq), nla_len(freq), NULL);
2059
2060 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2061 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2062 continue;
2063
2064 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2065 e->channel = nl80211_freq2channel(e->mhz);
2066
2067 e->restricted = (
2068 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
2069 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
2070 freqs[NL80211_FREQUENCY_ATTR_RADAR]
2071 ) ? 1 : 0;
2072
2073 e++;
2074 arr->count++;
2075 }
2076 }
2077
2078 return NL_SKIP;
2079 }
2080
2081 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2082 {
2083 struct nl80211_msg_conveyor *req;
2084 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2085
2086 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2087 if (req)
2088 {
2089 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2090 nl80211_free(req);
2091 }
2092
2093 if (arr.count > 0)
2094 {
2095 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2096 return 0;
2097 }
2098
2099 return -1;
2100 }
2101
2102 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2103 {
2104 char *buf = arg;
2105 struct nlattr **attr = nl80211_parse(msg);
2106
2107 if (attr[NL80211_ATTR_REG_ALPHA2])
2108 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2109 else
2110 buf[0] = 0;
2111
2112 return NL_SKIP;
2113 }
2114
2115 int nl80211_get_country(const char *ifname, char *buf)
2116 {
2117 int rv = -1;
2118 struct nl80211_msg_conveyor *req;
2119
2120 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2121 if (req)
2122 {
2123 nl80211_send(req, nl80211_get_country_cb, buf);
2124 nl80211_free(req);
2125
2126 if (buf[0])
2127 rv = 0;
2128 }
2129
2130 return rv;
2131 }
2132
2133 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2134 {
2135 int i, count;
2136 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2137 const struct iwinfo_iso3166_label *l;
2138
2139 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2140 {
2141 e->iso3166 = l->iso3166;
2142 e->ccode[0] = (l->iso3166 / 256);
2143 e->ccode[1] = (l->iso3166 % 256);
2144 }
2145
2146 *len = (count * sizeof(struct iwinfo_country_entry));
2147 return 0;
2148 }
2149
2150 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
2151 {
2152 int *modes = arg;
2153 int bands_remain, freqs_remain;
2154 uint16_t caps = 0;
2155 struct nlattr **attr = nl80211_parse(msg);
2156 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2157 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2158 struct nlattr *band, *freq;
2159
2160 *modes = 0;
2161
2162 if (attr[NL80211_ATTR_WIPHY_BANDS])
2163 {
2164 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2165 {
2166 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2167 nla_data(band), nla_len(band), NULL);
2168
2169 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2170 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2171
2172 /* Treat any nonzero capability as 11n */
2173 if (caps > 0)
2174 *modes |= IWINFO_80211_N;
2175
2176 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2177 freqs_remain)
2178 {
2179 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2180 nla_data(freq), nla_len(freq), NULL);
2181
2182 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2183 continue;
2184
2185 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2186 {
2187 *modes |= IWINFO_80211_B;
2188 *modes |= IWINFO_80211_G;
2189 }
2190 else
2191 {
2192 *modes |= IWINFO_80211_A;
2193 }
2194 }
2195 }
2196 }
2197
2198 return NL_SKIP;
2199 }
2200
2201 int nl80211_get_hwmodelist(const char *ifname, int *buf)
2202 {
2203 struct nl80211_msg_conveyor *req;
2204
2205 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2206 if (req)
2207 {
2208 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
2209 nl80211_free(req);
2210 }
2211
2212 return *buf ? 0 : -1;
2213 }
2214
2215 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
2216 {
2217 struct nlattr **attr = nl80211_parse(msg);
2218 struct nlattr *comb;
2219 int *ret = arg;
2220 int comb_rem, limit_rem, mode_rem;
2221
2222 *ret = 0;
2223 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
2224 return NL_SKIP;
2225
2226 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
2227 {
2228 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
2229 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
2230 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
2231 };
2232 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB];
2233 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
2234 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
2235 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
2236 };
2237 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT];
2238 struct nlattr *limit;
2239
2240 nla_parse_nested(tb_comb, NL80211_BAND_ATTR_MAX, comb, iface_combination_policy);
2241
2242 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
2243 continue;
2244
2245 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
2246 {
2247 struct nlattr *mode;
2248
2249 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
2250
2251 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
2252 !tb_limit[NL80211_IFACE_LIMIT_MAX])
2253 continue;
2254
2255 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
2256 continue;
2257
2258 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
2259 if (nla_type(mode) == NL80211_IFTYPE_AP)
2260 *ret = 1;
2261 }
2262 }
2263 }
2264
2265 return NL_SKIP;
2266 }
2267
2268 int nl80211_get_mbssid_support(const char *ifname, int *buf)
2269 {
2270 struct nl80211_msg_conveyor *req;
2271
2272 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2273 if (!req)
2274 return -1;
2275
2276 nl80211_send(req, nl80211_get_ifcomb_cb, buf);
2277 nl80211_free(req);
2278 return 0;
2279 }
2280
2281 int nl80211_get_hardware_id(const char *ifname, char *buf)
2282 {
2283 int rv;
2284 char *res;
2285
2286 /* Got a radioX pseudo interface, find some interface on it or create one */
2287 if (!strncmp(ifname, "radio", 5))
2288 {
2289 /* Reuse existing interface */
2290 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2291 {
2292 rv = wext_get_hardware_id(res, buf);
2293 }
2294
2295 /* Need to spawn a temporary iface for finding IDs */
2296 else if ((res = nl80211_ifadd(ifname)) != NULL)
2297 {
2298 rv = wext_get_hardware_id(res, buf);
2299 nl80211_ifdel(res);
2300 }
2301 }
2302 else
2303 {
2304 rv = wext_get_hardware_id(ifname, buf);
2305 }
2306
2307 /* Failed to obtain hardware IDs, search board config */
2308 if (rv)
2309 {
2310 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2311 }
2312
2313 return rv;
2314 }
2315
2316 static const struct iwinfo_hardware_entry *
2317 nl80211_get_hardware_entry(const char *ifname)
2318 {
2319 struct iwinfo_hardware_id id;
2320
2321 if (nl80211_get_hardware_id(ifname, (char *)&id))
2322 return NULL;
2323
2324 return iwinfo_hardware(&id);
2325 }
2326
2327 int nl80211_get_hardware_name(const char *ifname, char *buf)
2328 {
2329 const struct iwinfo_hardware_entry *hw;
2330
2331 if (!(hw = nl80211_get_hardware_entry(ifname)))
2332 sprintf(buf, "Generic MAC80211");
2333 else
2334 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2335
2336 return 0;
2337 }
2338
2339 int nl80211_get_txpower_offset(const char *ifname, int *buf)
2340 {
2341 const struct iwinfo_hardware_entry *hw;
2342
2343 if (!(hw = nl80211_get_hardware_entry(ifname)))
2344 return -1;
2345
2346 *buf = hw->txpower_offset;
2347 return 0;
2348 }
2349
2350 int nl80211_get_frequency_offset(const char *ifname, int *buf)
2351 {
2352 const struct iwinfo_hardware_entry *hw;
2353
2354 if (!(hw = nl80211_get_hardware_entry(ifname)))
2355 return -1;
2356
2357 *buf = hw->frequency_offset;
2358 return 0;
2359 }