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700410939d952086b91dd220561f7a1a513476a5
[openwrt/staging/yousong.git] / package / network / utils / iwinfo / src / iwinfo_nl80211.c
1 /*
2 * iwinfo - Wireless Information Library - NL80211 Backend
3 *
4 * Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
5 *
6 * The iwinfo library is free software: you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
9 *
10 * The iwinfo library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 * See the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with the iwinfo library. If not, see http://www.gnu.org/licenses/.
17 *
18 * The signal handling code is derived from the official madwifi tools,
19 * wlanconfig.c in particular. The encryption property handling was
20 * inspired by the hostapd madwifi driver.
21 *
22 * Parts of this code are derived from the Linux iw utility.
23 */
24
25 #include "iwinfo/nl80211.h"
26 #include "iwinfo/wext.h"
27
28 #define min(x, y) ((x) < (y)) ? (x) : (y)
29
30 static struct nl80211_state *nls = NULL;
31
32 static int nl80211_init(void)
33 {
34 int err, fd;
35
36 if (!nls)
37 {
38 nls = malloc(sizeof(struct nl80211_state));
39 if (!nls) {
40 err = -ENOMEM;
41 goto err;
42 }
43
44 memset(nls, 0, sizeof(*nls));
45
46 nls->nl_sock = nl_socket_alloc();
47 if (!nls->nl_sock) {
48 err = -ENOMEM;
49 goto err;
50 }
51
52 if (genl_connect(nls->nl_sock)) {
53 err = -ENOLINK;
54 goto err;
55 }
56
57 fd = nl_socket_get_fd(nls->nl_sock);
58 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
59 err = -EINVAL;
60 goto err;
61 }
62
63 if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
64 err = -ENOMEM;
65 goto err;
66 }
67
68 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
69 if (!nls->nl80211) {
70 err = -ENOENT;
71 goto err;
72 }
73
74 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
75 if (!nls->nlctrl) {
76 err = -ENOENT;
77 goto err;
78 }
79 }
80
81 return 0;
82
83
84 err:
85 nl80211_close();
86 return err;
87 }
88
89
90 static int nl80211_msg_error(struct sockaddr_nl *nla,
91 struct nlmsgerr *err, void *arg)
92 {
93 int *ret = arg;
94 *ret = err->error;
95 return NL_STOP;
96 }
97
98 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
99 {
100 int *ret = arg;
101 *ret = 0;
102 return NL_SKIP;
103 }
104
105 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
106 {
107 int *ret = arg;
108 *ret = 0;
109 return NL_STOP;
110 }
111
112 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
113 {
114 return NL_SKIP;
115 }
116
117 static void nl80211_free(struct nl80211_msg_conveyor *cv)
118 {
119 if (cv)
120 {
121 if (cv->cb)
122 nl_cb_put(cv->cb);
123
124 if (cv->msg)
125 nlmsg_free(cv->msg);
126
127 cv->cb = NULL;
128 cv->msg = NULL;
129 }
130 }
131
132 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
133 int cmd, int flags)
134 {
135 static struct nl80211_msg_conveyor cv;
136
137 struct nl_msg *req = NULL;
138 struct nl_cb *cb = NULL;
139
140 req = nlmsg_alloc();
141 if (!req)
142 goto err;
143
144 cb = nl_cb_alloc(NL_CB_DEFAULT);
145 if (!cb)
146 goto err;
147
148 genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
149
150 cv.msg = req;
151 cv.cb = cb;
152
153 return &cv;
154
155 err:
156 nla_put_failure:
157 if (cb)
158 nl_cb_put(cb);
159
160 if (req)
161 nlmsg_free(req);
162
163 return NULL;
164 }
165
166 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
167 {
168 if (nl80211_init() < 0)
169 return NULL;
170
171 return nl80211_new(nls->nlctrl, cmd, flags);
172 }
173
174 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
175 int cmd, int flags)
176 {
177 int ifidx = -1, phyidx = -1;
178 struct nl80211_msg_conveyor *cv;
179
180 if (nl80211_init() < 0)
181 return NULL;
182
183 if (!strncmp(ifname, "phy", 3))
184 phyidx = atoi(&ifname[3]);
185 else if (!strncmp(ifname, "radio", 5))
186 phyidx = atoi(&ifname[5]);
187 else if (!strncmp(ifname, "mon.", 4))
188 ifidx = if_nametoindex(&ifname[4]);
189 else
190 ifidx = if_nametoindex(ifname);
191
192 if ((ifidx < 0) && (phyidx < 0))
193 return NULL;
194
195 cv = nl80211_new(nls->nl80211, cmd, flags);
196 if (!cv)
197 return NULL;
198
199 if (ifidx > -1)
200 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
201
202 if (phyidx > -1)
203 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
204
205 return cv;
206
207 nla_put_failure:
208 nl80211_free(cv);
209 return NULL;
210 }
211
212 static struct nl80211_msg_conveyor * nl80211_send(
213 struct nl80211_msg_conveyor *cv,
214 int (*cb_func)(struct nl_msg *, void *), void *cb_arg
215 ) {
216 static struct nl80211_msg_conveyor rcv;
217 int err = 1;
218
219 if (cb_func)
220 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
221 else
222 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
223
224 if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
225 goto err;
226
227 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
228 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
229 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
230
231 while (err > 0)
232 nl_recvmsgs(nls->nl_sock, cv->cb);
233
234 return &rcv;
235
236 err:
237 nl_cb_put(cv->cb);
238 nlmsg_free(cv->msg);
239
240 return NULL;
241 }
242
243 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
244 {
245 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
246 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
247
248 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
249 genlmsg_attrlen(gnlh, 0), NULL);
250
251 return attr;
252 }
253
254
255 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
256 {
257 struct nl80211_group_conveyor *cv = arg;
258
259 struct nlattr **attr = nl80211_parse(msg);
260 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
261 struct nlattr *mgrp;
262 int mgrpidx;
263
264 if (!attr[CTRL_ATTR_MCAST_GROUPS])
265 return NL_SKIP;
266
267 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
268 {
269 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
270 nla_data(mgrp), nla_len(mgrp), NULL);
271
272 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
273 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
274 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
275 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
276 {
277 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
278 break;
279 }
280 }
281
282 return NL_SKIP;
283 }
284
285 static int nl80211_subscribe(const char *family, const char *group)
286 {
287 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
288 struct nl80211_msg_conveyor *req;
289
290 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
291 if (req)
292 {
293 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
294 nl80211_send(req, nl80211_subscribe_cb, &cv);
295
296 nla_put_failure:
297 nl80211_free(req);
298 }
299
300 return nl_socket_add_membership(nls->nl_sock, cv.id);
301 }
302
303
304 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
305 {
306 struct nl80211_event_conveyor *cv = arg;
307 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
308
309 if (gnlh->cmd == cv->wait)
310 cv->recv = gnlh->cmd;
311
312 return NL_SKIP;
313 }
314
315 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
316 {
317 return NL_OK;
318 }
319
320 static int nl80211_wait(const char *family, const char *group, int cmd)
321 {
322 struct nl80211_event_conveyor cv = { .wait = cmd };
323 struct nl_cb *cb;
324
325 if (nl80211_subscribe(family, group))
326 return -ENOENT;
327
328 cb = nl_cb_alloc(NL_CB_DEFAULT);
329
330 if (!cb)
331 return -ENOMEM;
332
333 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
334 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
335
336 while (!cv.recv)
337 nl_recvmsgs(nls->nl_sock, cb);
338
339 nl_cb_put(cb);
340
341 return 0;
342 }
343
344
345 static int nl80211_freq2channel(int freq)
346 {
347 if (freq == 2484)
348 return 14;
349 else if (freq < 2484)
350 return (freq - 2407) / 5;
351 else if (freq >= 4910 && freq <= 4980)
352 return (freq - 4000) / 5;
353 else
354 return (freq - 5000) / 5;
355 }
356
357 static int nl80211_channel2freq(int channel, const char *band)
358 {
359 if (!band || band[0] != 'a')
360 {
361 if (channel == 14)
362 return 2484;
363 else if (channel < 14)
364 return (channel * 5) + 2407;
365 }
366 else
367 {
368 if (channel >= 182 && channel <= 196)
369 return (channel * 5) + 4000;
370 else
371 return (channel * 5) + 5000;
372 }
373
374 return 0;
375 }
376
377 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
378 {
379 int i, len;
380 char lkey[64] = { 0 };
381 const char *ln = buf;
382 static char lval[256] = { 0 };
383
384 int matched_if = ifname ? 0 : 1;
385
386
387 for( i = 0, len = strlen(buf); i < len; i++ )
388 {
389 if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
390 {
391 ln++;
392 }
393 else if (!lkey[0] && (buf[i] == '='))
394 {
395 if ((&buf[i] - ln) > 0)
396 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
397 }
398 else if (buf[i] == '\n')
399 {
400 if (lkey[0])
401 {
402 memcpy(lval, ln + strlen(lkey) + 1,
403 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
404
405 if ((ifname != NULL) &&
406 (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
407 {
408 matched_if = !strcmp(lval, ifname);
409 }
410 else if (matched_if && !strcmp(lkey, key))
411 {
412 return lval;
413 }
414 }
415
416 ln = &buf[i+1];
417 memset(lkey, 0, sizeof(lkey));
418 memset(lval, 0, sizeof(lval));
419 }
420 }
421
422 return NULL;
423 }
424
425 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
426 {
427 char *buf = arg;
428 struct nlattr **attr = nl80211_parse(msg);
429
430 if (attr[NL80211_ATTR_WIPHY_NAME])
431 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
432 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
433 else
434 buf[0] = 0;
435
436 return NL_SKIP;
437 }
438
439 static char * nl80211_ifname2phy(const char *ifname)
440 {
441 static char phy[32] = { 0 };
442 struct nl80211_msg_conveyor *req;
443
444 memset(phy, 0, sizeof(phy));
445
446 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
447 if (req)
448 {
449 nl80211_send(req, nl80211_ifname2phy_cb, phy);
450 nl80211_free(req);
451 }
452
453 return phy[0] ? phy : NULL;
454 }
455
456 static char * nl80211_hostapd_info(const char *ifname)
457 {
458 int mode;
459 char *phy;
460 char path[32] = { 0 };
461 static char buf[4096] = { 0 };
462 FILE *conf;
463
464 if (nl80211_get_mode(ifname, &mode))
465 return NULL;
466
467 if ((mode == IWINFO_OPMODE_MASTER || mode == IWINFO_OPMODE_AP_VLAN) &&
468 (phy = nl80211_ifname2phy(ifname)) != NULL)
469 {
470 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
471
472 if ((conf = fopen(path, "r")) != NULL)
473 {
474 fread(buf, sizeof(buf) - 1, 1, conf);
475 fclose(conf);
476
477 return buf;
478 }
479 }
480
481 return NULL;
482 }
483
484 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
485 {
486 fd_set rfds;
487 struct timeval tv = { 2, 0 };
488
489 FD_ZERO(&rfds);
490 FD_SET(sock, &rfds);
491
492 memset(buf, 0, blen);
493
494
495 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
496 return -1;
497
498 if (!FD_ISSET(sock, &rfds))
499 return -1;
500
501 return recv(sock, buf, blen, 0);
502 }
503
504 static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
505 const char *event)
506 {
507 int numtry = 0;
508 int sock = -1;
509 char *rv = NULL;
510 size_t remote_length, local_length;
511 static char buffer[10240] = { 0 };
512
513 struct sockaddr_un local = { 0 };
514 struct sockaddr_un remote = { 0 };
515
516
517 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
518 if (sock < 0)
519 return NULL;
520
521 remote.sun_family = AF_UNIX;
522 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
523 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
524
525 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
526 goto out;
527
528 if (connect(sock, (struct sockaddr *) &remote, remote_length))
529 goto out;
530
531 local.sun_family = AF_UNIX;
532 local_length = sizeof(local.sun_family) +
533 sprintf(local.sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
534
535 if (bind(sock, (struct sockaddr *) &local, local_length))
536 goto out;
537
538
539 if (event)
540 {
541 send(sock, "ATTACH", 6, 0);
542
543 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
544 goto out;
545 }
546
547
548 send(sock, cmd, strlen(cmd), 0);
549
550 while( numtry++ < 5 )
551 {
552 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
553 {
554 if (event)
555 continue;
556
557 break;
558 }
559
560 if ((!event && buffer[0] != '<') || (event && strstr(buffer, event)))
561 break;
562 }
563
564 rv = buffer;
565
566 out:
567 close(sock);
568
569 if (local.sun_family)
570 unlink(local.sun_path);
571
572 return rv;
573 }
574
575 static inline int nl80211_readint(const char *path)
576 {
577 int fd;
578 int rv = -1;
579 char buffer[16];
580
581 if ((fd = open(path, O_RDONLY)) > -1)
582 {
583 if (read(fd, buffer, sizeof(buffer)) > 0)
584 rv = atoi(buffer);
585
586 close(fd);
587 }
588
589 return rv;
590 }
591
592 static char * nl80211_phy2ifname(const char *ifname)
593 {
594 int fd, ifidx = -1, cifidx = -1, phyidx = -1;
595 char buffer[64];
596 static char nif[IFNAMSIZ] = { 0 };
597
598 DIR *d;
599 struct dirent *e;
600
601 if (!ifname)
602 return NULL;
603 else if (!strncmp(ifname, "phy", 3))
604 phyidx = atoi(&ifname[3]);
605 else if (!strncmp(ifname, "radio", 5))
606 phyidx = atoi(&ifname[5]);
607
608 memset(nif, 0, sizeof(nif));
609
610 if (phyidx > -1)
611 {
612 if ((d = opendir("/sys/class/net")) != NULL)
613 {
614 while ((e = readdir(d)) != NULL)
615 {
616 snprintf(buffer, sizeof(buffer),
617 "/sys/class/net/%s/phy80211/index", e->d_name);
618
619 if (nl80211_readint(buffer) == phyidx)
620 {
621 snprintf(buffer, sizeof(buffer),
622 "/sys/class/net/%s/ifindex", e->d_name);
623
624 if ((cifidx = nl80211_readint(buffer)) >= 0 &&
625 ((ifidx < 0) || (cifidx < ifidx)))
626 {
627 ifidx = cifidx;
628 strncpy(nif, e->d_name, sizeof(nif));
629 }
630 }
631 }
632
633 closedir(d);
634 }
635 }
636
637 return nif[0] ? nif : NULL;
638 }
639
640 static char * nl80211_ifadd(const char *ifname)
641 {
642 int phyidx;
643 char *rv = NULL;
644 static char nif[IFNAMSIZ] = { 0 };
645 struct nl80211_msg_conveyor *req, *res;
646
647 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
648 if (req)
649 {
650 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
651
652 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
653 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
654
655 nl80211_send(req, NULL, NULL);
656
657 rv = nif;
658
659 nla_put_failure:
660 nl80211_free(req);
661 }
662
663 return rv;
664 }
665
666 static void nl80211_ifdel(const char *ifname)
667 {
668 struct nl80211_msg_conveyor *req;
669
670 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
671 if (req)
672 {
673 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
674
675 nl80211_send(req, NULL, NULL);
676
677 nla_put_failure:
678 nl80211_free(req);
679 }
680 }
681
682 static void nl80211_hostapd_hup(const char *ifname)
683 {
684 int fd, pid = 0;
685 char buf[32];
686 char *phy = nl80211_ifname2phy(ifname);
687
688 if (phy)
689 {
690 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
691 if ((fd = open(buf, O_RDONLY)) > 0)
692 {
693 if (read(fd, buf, sizeof(buf)) > 0)
694 pid = atoi(buf);
695
696 close(fd);
697 }
698
699 if (pid > 0)
700 kill(pid, 1);
701 }
702 }
703
704
705 int nl80211_probe(const char *ifname)
706 {
707 return !!nl80211_ifname2phy(ifname);
708 }
709
710 void nl80211_close(void)
711 {
712 if (nls)
713 {
714 if (nls->nlctrl)
715 genl_family_put(nls->nlctrl);
716
717 if (nls->nl80211)
718 genl_family_put(nls->nl80211);
719
720 if (nls->nl_sock)
721 nl_socket_free(nls->nl_sock);
722
723 if (nls->nl_cache)
724 nl_cache_free(nls->nl_cache);
725
726 free(nls);
727 nls = NULL;
728 }
729 }
730
731
732 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
733 {
734 int *mode = arg;
735 struct nlattr **tb = nl80211_parse(msg);
736 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
737 IWINFO_OPMODE_UNKNOWN, /* unspecified */
738 IWINFO_OPMODE_ADHOC, /* IBSS */
739 IWINFO_OPMODE_CLIENT, /* managed */
740 IWINFO_OPMODE_MASTER, /* AP */
741 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
742 IWINFO_OPMODE_WDS, /* WDS */
743 IWINFO_OPMODE_MONITOR, /* monitor */
744 IWINFO_OPMODE_MESHPOINT, /* mesh point */
745 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
746 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
747 };
748
749 if (tb[NL80211_ATTR_IFTYPE])
750 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
751
752 return NL_SKIP;
753 }
754
755 int nl80211_get_mode(const char *ifname, int *buf)
756 {
757 char *res;
758 struct nl80211_msg_conveyor *req;
759
760 res = nl80211_phy2ifname(ifname);
761 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
762 *buf = IWINFO_OPMODE_UNKNOWN;
763
764 if (req)
765 {
766 nl80211_send(req, nl80211_get_mode_cb, buf);
767 nl80211_free(req);
768 }
769
770 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
771 }
772
773
774 struct nl80211_ssid_bssid {
775 unsigned char *ssid;
776 unsigned char bssid[7];
777 };
778
779 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
780 {
781 int ielen;
782 unsigned char *ie;
783 struct nl80211_ssid_bssid *sb = arg;
784 struct nlattr **tb = nl80211_parse(msg);
785 struct nlattr *bss[NL80211_BSS_MAX + 1];
786
787 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
788 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
789 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
790 };
791
792 if (!tb[NL80211_ATTR_BSS] ||
793 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
794 bss_policy) ||
795 !bss[NL80211_BSS_BSSID] ||
796 !bss[NL80211_BSS_STATUS] ||
797 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
798 {
799 return NL_SKIP;
800 }
801
802 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
803 {
804 case NL80211_BSS_STATUS_ASSOCIATED:
805 case NL80211_BSS_STATUS_AUTHENTICATED:
806 case NL80211_BSS_STATUS_IBSS_JOINED:
807
808 if (sb->ssid)
809 {
810 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
811 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
812
813 while (ielen >= 2 && ielen >= ie[1])
814 {
815 if (ie[0] == 0)
816 {
817 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
818 return NL_SKIP;
819 }
820
821 ielen -= ie[1] + 2;
822 ie += ie[1] + 2;
823 }
824 }
825 else
826 {
827 sb->bssid[0] = 1;
828 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
829 return NL_SKIP;
830 }
831
832 default:
833 return NL_SKIP;
834 }
835 }
836
837 int nl80211_get_ssid(const char *ifname, char *buf)
838 {
839 char *res;
840 struct nl80211_msg_conveyor *req;
841 struct nl80211_ssid_bssid sb;
842
843 /* try to find ssid from scan dump results */
844 res = nl80211_phy2ifname(ifname);
845 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
846
847 sb.ssid = buf;
848 *buf = 0;
849
850 if (req)
851 {
852 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
853 nl80211_free(req);
854 }
855
856 /* failed, try to find from hostapd info */
857 if ((*buf == 0) &&
858 (res = nl80211_hostapd_info(ifname)) &&
859 (res = nl80211_getval(ifname, res, "ssid")))
860 {
861 memcpy(buf, res, strlen(res));
862 }
863
864 return (*buf == 0) ? -1 : 0;
865 }
866
867 int nl80211_get_bssid(const char *ifname, char *buf)
868 {
869 char *res;
870 struct nl80211_msg_conveyor *req;
871 struct nl80211_ssid_bssid sb;
872
873 /* try to find bssid from scan dump results */
874 res = nl80211_phy2ifname(ifname);
875 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
876
877 sb.ssid = NULL;
878 sb.bssid[0] = 0;
879
880 if (req)
881 {
882 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
883 nl80211_free(req);
884 }
885
886 /* failed, try to find mac from hostapd info */
887 if ((sb.bssid[0] == 0) &&
888 (res = nl80211_hostapd_info(ifname)) &&
889 (res = nl80211_getval(ifname, res, "bssid")))
890 {
891 sb.bssid[0] = 1;
892 sb.bssid[1] = strtol(&res[0], NULL, 16);
893 sb.bssid[2] = strtol(&res[3], NULL, 16);
894 sb.bssid[3] = strtol(&res[6], NULL, 16);
895 sb.bssid[4] = strtol(&res[9], NULL, 16);
896 sb.bssid[5] = strtol(&res[12], NULL, 16);
897 sb.bssid[6] = strtol(&res[15], NULL, 16);
898 }
899
900 if (sb.bssid[0])
901 {
902 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
903 sb.bssid[1], sb.bssid[2], sb.bssid[3],
904 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
905
906 return 0;
907 }
908
909 return -1;
910 }
911
912
913 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
914 {
915 int *freq = arg;
916 struct nlattr **attr = nl80211_parse(msg);
917 struct nlattr *binfo[NL80211_BSS_MAX + 1];
918
919 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
920 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
921 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
922 };
923
924 if (attr[NL80211_ATTR_BSS] &&
925 !nla_parse_nested(binfo, NL80211_BSS_MAX,
926 attr[NL80211_ATTR_BSS], bss_policy))
927 {
928 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
929 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
930 }
931
932 return NL_SKIP;
933 }
934
935 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
936 {
937 int *freq = arg;
938 struct nlattr **tb = nl80211_parse(msg);
939
940 if (tb[NL80211_ATTR_WIPHY_FREQ])
941 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
942
943 return NL_SKIP;
944 }
945
946 int nl80211_get_frequency(const char *ifname, int *buf)
947 {
948 int chn;
949 char *res, *channel;
950 struct nl80211_msg_conveyor *req;
951
952 /* try to find frequency from interface info */
953 res = nl80211_phy2ifname(ifname);
954 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
955 *buf = 0;
956
957 if (req)
958 {
959 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
960 nl80211_free(req);
961 }
962
963 /* failed, try to find frequency from hostapd info */
964 if ((*buf == 0) &&
965 (res = nl80211_hostapd_info(ifname)) &&
966 (channel = nl80211_getval(NULL, res, "channel")))
967 {
968 chn = atoi(channel);
969 *buf = nl80211_channel2freq(chn, nl80211_getval(NULL, res, "hw_mode"));
970 }
971 else
972 {
973 /* failed, try to find frequency from scan results */
974 if (*buf == 0)
975 {
976 res = nl80211_phy2ifname(ifname);
977 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN,
978 NLM_F_DUMP);
979
980 if (req)
981 {
982 nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
983 nl80211_free(req);
984 }
985 }
986 }
987
988 return (*buf == 0) ? -1 : 0;
989 }
990
991 int nl80211_get_channel(const char *ifname, int *buf)
992 {
993 if (!nl80211_get_frequency(ifname, buf))
994 {
995 *buf = nl80211_freq2channel(*buf);
996 return 0;
997 }
998
999 return -1;
1000 }
1001
1002
1003 int nl80211_get_txpower(const char *ifname, int *buf)
1004 {
1005 #if 0
1006 char *res;
1007 char path[PATH_MAX];
1008
1009 res = nl80211_ifname2phy(ifname);
1010 snprintf(path, sizeof(path), "/sys/kernel/debug/ieee80211/%s/power",
1011 res ? res : ifname);
1012
1013 if ((*buf = nl80211_readint(path)) > -1)
1014 return 0;
1015 #endif
1016
1017 return wext_get_txpower(ifname, buf);
1018 }
1019
1020
1021 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1022 {
1023 int8_t dbm;
1024 int16_t mbit;
1025 struct nl80211_rssi_rate *rr = arg;
1026 struct nlattr **attr = nl80211_parse(msg);
1027 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1028 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1029
1030 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1031 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1032 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1033 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1034 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1035 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1036 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1037 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1038 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1039 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1040 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1041 };
1042
1043 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1044 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1045 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1046 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1047 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1048 };
1049
1050 if (attr[NL80211_ATTR_STA_INFO])
1051 {
1052 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1053 attr[NL80211_ATTR_STA_INFO], stats_policy))
1054 {
1055 if (sinfo[NL80211_STA_INFO_SIGNAL])
1056 {
1057 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1058 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1059 }
1060
1061 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1062 {
1063 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1064 sinfo[NL80211_STA_INFO_TX_BITRATE],
1065 rate_policy))
1066 {
1067 if (rinfo[NL80211_RATE_INFO_BITRATE])
1068 {
1069 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1070 rr->rate = rr->rate
1071 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1072 }
1073 }
1074 }
1075 }
1076 }
1077
1078 return NL_SKIP;
1079 }
1080
1081 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1082 {
1083 DIR *d;
1084 struct dirent *de;
1085 struct nl80211_msg_conveyor *req;
1086
1087 r->rssi = 0;
1088 r->rate = 0;
1089
1090 if ((d = opendir("/sys/class/net")) != NULL)
1091 {
1092 while ((de = readdir(d)) != NULL)
1093 {
1094 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1095 (!de->d_name[strlen(ifname)] ||
1096 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1097 {
1098 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1099 NLM_F_DUMP);
1100
1101 if (req)
1102 {
1103 nl80211_send(req, nl80211_fill_signal_cb, r);
1104 nl80211_free(req);
1105 }
1106 }
1107 }
1108
1109 closedir(d);
1110 }
1111 }
1112
1113 int nl80211_get_bitrate(const char *ifname, int *buf)
1114 {
1115 struct nl80211_rssi_rate rr;
1116
1117 nl80211_fill_signal(ifname, &rr);
1118
1119 if (rr.rate)
1120 {
1121 *buf = (rr.rate * 100);
1122 return 0;
1123 }
1124
1125 return -1;
1126 }
1127
1128 int nl80211_get_signal(const char *ifname, int *buf)
1129 {
1130 struct nl80211_rssi_rate rr;
1131
1132 nl80211_fill_signal(ifname, &rr);
1133
1134 if (rr.rssi)
1135 {
1136 *buf = rr.rssi;
1137 return 0;
1138 }
1139
1140 return -1;
1141 }
1142
1143 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1144 {
1145 int8_t *noise = arg;
1146 struct nlattr **tb = nl80211_parse(msg);
1147 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1148
1149 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1150 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1151 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1152 };
1153
1154 if (!tb[NL80211_ATTR_SURVEY_INFO])
1155 return NL_SKIP;
1156
1157 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1158 tb[NL80211_ATTR_SURVEY_INFO], sp))
1159 return NL_SKIP;
1160
1161 if (!si[NL80211_SURVEY_INFO_NOISE])
1162 return NL_SKIP;
1163
1164 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1165 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1166
1167 return NL_SKIP;
1168 }
1169
1170
1171 int nl80211_get_noise(const char *ifname, int *buf)
1172 {
1173 int8_t noise;
1174 struct nl80211_msg_conveyor *req;
1175
1176 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1177 if (req)
1178 {
1179 noise = 0;
1180
1181 nl80211_send(req, nl80211_get_noise_cb, &noise);
1182 nl80211_free(req);
1183
1184 if (noise)
1185 {
1186 *buf = noise;
1187 return 0;
1188 }
1189 }
1190
1191 return -1;
1192 }
1193
1194 int nl80211_get_quality(const char *ifname, int *buf)
1195 {
1196 int signal;
1197
1198 if (!nl80211_get_signal(ifname, &signal))
1199 {
1200 /* A positive signal level is usually just a quality
1201 * value, pass through as-is */
1202 if (signal >= 0)
1203 {
1204 *buf = signal;
1205 }
1206
1207 /* The cfg80211 wext compat layer assumes a signal range
1208 * of -110 dBm to -40 dBm, the quality value is derived
1209 * by adding 110 to the signal level */
1210 else
1211 {
1212 if (signal < -110)
1213 signal = -110;
1214 else if (signal > -40)
1215 signal = -40;
1216
1217 *buf = (signal + 110);
1218 }
1219
1220 return 0;
1221 }
1222
1223 return -1;
1224 }
1225
1226 int nl80211_get_quality_max(const char *ifname, int *buf)
1227 {
1228 /* The cfg80211 wext compat layer assumes a maximum
1229 * quality of 70 */
1230 *buf = 70;
1231
1232 return 0;
1233 }
1234
1235 int nl80211_get_encryption(const char *ifname, char *buf)
1236 {
1237 int i;
1238 char k[9];
1239 char *val, *res;
1240 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1241
1242 /* WPA supplicant */
1243 if ((res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
1244 (val = nl80211_getval(NULL, res, "pairwise_cipher")))
1245 {
1246 /* WEP */
1247 if (strstr(val, "WEP"))
1248 {
1249 if (strstr(val, "WEP-40"))
1250 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1251
1252 else if (strstr(val, "WEP-104"))
1253 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1254
1255 c->enabled = 1;
1256 c->group_ciphers = c->pair_ciphers;
1257
1258 c->auth_suites |= IWINFO_KMGMT_NONE;
1259 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1260 }
1261
1262 /* WPA */
1263 else
1264 {
1265 if (strstr(val, "TKIP"))
1266 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1267
1268 else if (strstr(val, "CCMP"))
1269 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1270
1271 else if (strstr(val, "NONE"))
1272 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1273
1274 else if (strstr(val, "WEP-40"))
1275 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1276
1277 else if (strstr(val, "WEP-104"))
1278 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1279
1280
1281 if ((val = nl80211_getval(NULL, res, "group_cipher")))
1282 {
1283 if (strstr(val, "TKIP"))
1284 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1285
1286 else if (strstr(val, "CCMP"))
1287 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1288
1289 else if (strstr(val, "NONE"))
1290 c->group_ciphers |= IWINFO_CIPHER_NONE;
1291
1292 else if (strstr(val, "WEP-40"))
1293 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1294
1295 else if (strstr(val, "WEP-104"))
1296 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1297 }
1298
1299
1300 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
1301 {
1302 if (strstr(val, "WPA2"))
1303 c->wpa_version = 2;
1304
1305 else if (strstr(val, "WPA"))
1306 c->wpa_version = 1;
1307
1308
1309 if (strstr(val, "PSK"))
1310 c->auth_suites |= IWINFO_KMGMT_PSK;
1311
1312 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
1313 c->auth_suites |= IWINFO_KMGMT_8021x;
1314
1315 else if (strstr(val, "NONE"))
1316 c->auth_suites |= IWINFO_KMGMT_NONE;
1317 }
1318
1319 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1320 }
1321
1322 return 0;
1323 }
1324
1325 /* Hostapd */
1326 else if ((res = nl80211_hostapd_info(ifname)))
1327 {
1328 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
1329 c->wpa_version = atoi(val);
1330
1331 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
1332
1333 if (!val || strstr(val, "PSK"))
1334 c->auth_suites |= IWINFO_KMGMT_PSK;
1335
1336 if (val && strstr(val, "EAP"))
1337 c->auth_suites |= IWINFO_KMGMT_8021x;
1338
1339 if (val && strstr(val, "NONE"))
1340 c->auth_suites |= IWINFO_KMGMT_NONE;
1341
1342 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
1343 {
1344 if (strstr(val, "TKIP"))
1345 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1346
1347 if (strstr(val, "CCMP"))
1348 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1349
1350 if (strstr(val, "NONE"))
1351 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1352 }
1353
1354 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1355 {
1356 switch(atoi(val)) {
1357 case 1:
1358 c->auth_algs |= IWINFO_AUTH_OPEN;
1359 break;
1360
1361 case 2:
1362 c->auth_algs |= IWINFO_AUTH_SHARED;
1363 break;
1364
1365 case 3:
1366 c->auth_algs |= IWINFO_AUTH_OPEN;
1367 c->auth_algs |= IWINFO_AUTH_SHARED;
1368 break;
1369
1370 default:
1371 break;
1372 }
1373
1374 for (i = 0; i < 4; i++)
1375 {
1376 snprintf(k, sizeof(k), "wep_key%d", i);
1377
1378 if ((val = nl80211_getval(ifname, res, k)))
1379 {
1380 if ((strlen(val) == 5) || (strlen(val) == 10))
1381 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1382
1383 else if ((strlen(val) == 13) || (strlen(val) == 26))
1384 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1385 }
1386 }
1387 }
1388
1389 c->group_ciphers = c->pair_ciphers;
1390 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1391
1392 return 0;
1393 }
1394
1395 return -1;
1396 }
1397
1398
1399 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1400 {
1401 struct nl80211_array_buf *arr = arg;
1402 struct iwinfo_assoclist_entry *e = arr->buf;
1403 struct nlattr **attr = nl80211_parse(msg);
1404 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1405 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1406
1407 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1408 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1409 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1410 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1411 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1412 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1413 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1414 };
1415
1416 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1417 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1418 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1419 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1420 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1421 };
1422
1423 /* advance to end of array */
1424 e += arr->count;
1425 memset(e, 0, sizeof(*e));
1426
1427 if (attr[NL80211_ATTR_MAC])
1428 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1429
1430 if (attr[NL80211_ATTR_STA_INFO] &&
1431 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1432 attr[NL80211_ATTR_STA_INFO], stats_policy))
1433 {
1434 if (sinfo[NL80211_STA_INFO_SIGNAL])
1435 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1436
1437 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1438 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1439
1440 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1441 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1442
1443 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1444 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1445
1446 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1447 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1448 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1449 {
1450 if (rinfo[NL80211_RATE_INFO_BITRATE])
1451 e->rx_rate.rate =
1452 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1453
1454 if (rinfo[NL80211_RATE_INFO_MCS])
1455 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1456
1457 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1458 e->rx_rate.is_40mhz = 1;
1459
1460 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1461 e->rx_rate.is_short_gi = 1;
1462 }
1463
1464 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1465 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1466 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1467 {
1468 if (rinfo[NL80211_RATE_INFO_BITRATE])
1469 e->tx_rate.rate =
1470 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1471
1472 if (rinfo[NL80211_RATE_INFO_MCS])
1473 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1474
1475 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1476 e->tx_rate.is_40mhz = 1;
1477
1478 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1479 e->tx_rate.is_short_gi = 1;
1480 }
1481 }
1482
1483 e->noise = 0; /* filled in by caller */
1484 arr->count++;
1485
1486 return NL_SKIP;
1487 }
1488
1489 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1490 {
1491 DIR *d;
1492 int i, noise = 0;
1493 struct dirent *de;
1494 struct nl80211_msg_conveyor *req;
1495 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1496 struct iwinfo_assoclist_entry *e;
1497
1498 if ((d = opendir("/sys/class/net")) != NULL)
1499 {
1500 while ((de = readdir(d)) != NULL)
1501 {
1502 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1503 (!de->d_name[strlen(ifname)] ||
1504 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1505 {
1506 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1507 NLM_F_DUMP);
1508
1509 if (req)
1510 {
1511 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1512 nl80211_free(req);
1513 }
1514 }
1515 }
1516
1517 closedir(d);
1518
1519 if (!nl80211_get_noise(ifname, &noise))
1520 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1521 e->noise = noise;
1522
1523 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1524 return 0;
1525 }
1526
1527 return -1;
1528 }
1529
1530 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1531 {
1532 int *dbm_max = arg;
1533 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1534
1535 struct nlattr **attr = nl80211_parse(msg);
1536 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1537 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1538 struct nlattr *band, *freq;
1539
1540 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1541 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1542 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1543 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1544 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1545 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1546 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1547 };
1548
1549 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1550 *dbm_max = -1;
1551
1552 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1553 {
1554 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1555 nla_len(band), NULL);
1556
1557 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1558 {
1559 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1560 nla_data(freq), nla_len(freq), freq_policy);
1561
1562 ch_cmp = nl80211_freq2channel(nla_get_u32(
1563 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1564
1565 if ((!ch_cur || (ch_cmp == ch_cur)) &&
1566 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1567 {
1568 *dbm_max = (int)(0.01 * nla_get_u32(
1569 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1570
1571 break;
1572 }
1573 }
1574 }
1575
1576 return NL_SKIP;
1577 }
1578
1579 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1580 {
1581 int ch_cur;
1582 int dbm_max = -1, dbm_cur, dbm_cnt;
1583 struct nl80211_msg_conveyor *req;
1584 struct iwinfo_txpwrlist_entry entry;
1585
1586 if (nl80211_get_channel(ifname, &ch_cur))
1587 ch_cur = 0;
1588
1589 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1590 if (req)
1591 {
1592 /* initialize the value pointer with channel for callback */
1593 dbm_max = ch_cur;
1594
1595 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1596 nl80211_free(req);
1597 }
1598
1599 if (dbm_max > 0)
1600 {
1601 for (dbm_cur = 0, dbm_cnt = 0;
1602 dbm_cur < dbm_max;
1603 dbm_cur++, dbm_cnt++)
1604 {
1605 entry.dbm = dbm_cur;
1606 entry.mw = iwinfo_dbm2mw(dbm_cur);
1607
1608 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1609 }
1610
1611 entry.dbm = dbm_max;
1612 entry.mw = iwinfo_dbm2mw(dbm_max);
1613
1614 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1615 dbm_cnt++;
1616
1617 *len = dbm_cnt * sizeof(entry);
1618 return 0;
1619 }
1620
1621 return -1;
1622 }
1623
1624 static void nl80211_get_scancrypto(const char *spec,
1625 struct iwinfo_crypto_entry *c)
1626 {
1627 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1628 {
1629 c->enabled = 1;
1630
1631 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1632 c->wpa_version = 3;
1633
1634 else if (strstr(spec, "WPA2"))
1635 c->wpa_version = 2;
1636
1637 else if (strstr(spec, "WPA"))
1638 c->wpa_version = 1;
1639
1640 else if (strstr(spec, "WEP"))
1641 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1642
1643
1644 if (strstr(spec, "PSK"))
1645 c->auth_suites |= IWINFO_KMGMT_PSK;
1646
1647 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1648 c->auth_suites |= IWINFO_KMGMT_8021x;
1649
1650 if (strstr(spec, "WPA-NONE"))
1651 c->auth_suites |= IWINFO_KMGMT_NONE;
1652
1653
1654 if (strstr(spec, "TKIP"))
1655 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1656
1657 if (strstr(spec, "CCMP"))
1658 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1659
1660 if (strstr(spec, "WEP-40"))
1661 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1662
1663 if (strstr(spec, "WEP-104"))
1664 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1665
1666 c->group_ciphers = c->pair_ciphers;
1667 }
1668 else
1669 {
1670 c->enabled = 0;
1671 }
1672 }
1673
1674
1675 struct nl80211_scanlist {
1676 struct iwinfo_scanlist_entry *e;
1677 int len;
1678 };
1679
1680
1681 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1682 struct iwinfo_scanlist_entry *e)
1683 {
1684 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1685 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1686 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1687
1688 while (ielen >= 2 && ielen >= ie[1])
1689 {
1690 switch (ie[0])
1691 {
1692 case 0: /* SSID */
1693 memcpy(e->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1694 break;
1695
1696 case 48: /* RSN */
1697 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1698 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1699 break;
1700
1701 case 221: /* Vendor */
1702 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1703 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1704 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1705 break;
1706 }
1707
1708 ielen -= ie[1] + 2;
1709 ie += ie[1] + 2;
1710 }
1711 }
1712
1713 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
1714 {
1715 int8_t rssi;
1716 uint16_t caps;
1717
1718 struct nl80211_scanlist *sl = arg;
1719 struct nlattr **tb = nl80211_parse(msg);
1720 struct nlattr *bss[NL80211_BSS_MAX + 1];
1721
1722 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1723 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1724 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1725 [NL80211_BSS_BSSID] = { },
1726 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1727 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1728 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
1729 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1730 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1731 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1732 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1733 [NL80211_BSS_BEACON_IES] = { },
1734 };
1735
1736 if (!tb[NL80211_ATTR_BSS] ||
1737 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1738 bss_policy) ||
1739 !bss[NL80211_BSS_BSSID])
1740 {
1741 return NL_SKIP;
1742 }
1743
1744 if (bss[NL80211_BSS_CAPABILITY])
1745 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1746 else
1747 caps = 0;
1748
1749 memset(sl->e, 0, sizeof(*sl->e));
1750 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
1751
1752 if (caps & (1<<1))
1753 sl->e->mode = IWINFO_OPMODE_ADHOC;
1754 else
1755 sl->e->mode = IWINFO_OPMODE_MASTER;
1756
1757 if (caps & (1<<4))
1758 sl->e->crypto.enabled = 1;
1759
1760 if (bss[NL80211_BSS_FREQUENCY])
1761 sl->e->channel = nl80211_freq2channel(nla_get_u32(
1762 bss[NL80211_BSS_FREQUENCY]));
1763
1764 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
1765 nl80211_get_scanlist_ie(bss, sl->e);
1766
1767 if (bss[NL80211_BSS_SIGNAL_MBM])
1768 {
1769 sl->e->signal =
1770 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
1771
1772 rssi = sl->e->signal - 0x100;
1773
1774 if (rssi < -110)
1775 rssi = -110;
1776 else if (rssi > -40)
1777 rssi = -40;
1778
1779 sl->e->quality = (rssi + 110);
1780 sl->e->quality_max = 70;
1781 }
1782
1783 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
1784 {
1785 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1786 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
1787 }
1788
1789 sl->e++;
1790 sl->len++;
1791
1792 return NL_SKIP;
1793 }
1794
1795 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
1796 {
1797 struct nl80211_msg_conveyor *req;
1798 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
1799
1800 req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
1801 if (req)
1802 {
1803 nl80211_send(req, NULL, NULL);
1804 nl80211_free(req);
1805 }
1806
1807 nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
1808
1809 req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1810 if (req)
1811 {
1812 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
1813 nl80211_free(req);
1814 }
1815
1816 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
1817 return *len ? 0 : -1;
1818 }
1819
1820 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1821 {
1822 int freq, rssi, qmax, count;
1823 char *res;
1824 char ssid[128] = { 0 };
1825 char bssid[18] = { 0 };
1826 char cipher[256] = { 0 };
1827
1828 /* Got a radioX pseudo interface, find some interface on it or create one */
1829 if (!strncmp(ifname, "radio", 5))
1830 {
1831 /* Reuse existing interface */
1832 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1833 {
1834 return nl80211_get_scanlist(res, buf, len);
1835 }
1836
1837 /* Need to spawn a temporary iface for scanning */
1838 else if ((res = nl80211_ifadd(ifname)) != NULL)
1839 {
1840 count = nl80211_get_scanlist(res, buf, len);
1841 nl80211_ifdel(res);
1842 return count;
1843 }
1844 }
1845
1846 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1847
1848 /* WPA supplicant */
1849 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1850 {
1851 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1852 {
1853 nl80211_get_quality_max(ifname, &qmax);
1854
1855 /* skip header line */
1856 while (*res++ != '\n');
1857
1858 count = 0;
1859
1860 while (sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1861 bssid, &freq, &rssi, cipher, ssid) > 0)
1862 {
1863 /* BSSID */
1864 e->mac[0] = strtol(&bssid[0], NULL, 16);
1865 e->mac[1] = strtol(&bssid[3], NULL, 16);
1866 e->mac[2] = strtol(&bssid[6], NULL, 16);
1867 e->mac[3] = strtol(&bssid[9], NULL, 16);
1868 e->mac[4] = strtol(&bssid[12], NULL, 16);
1869 e->mac[5] = strtol(&bssid[15], NULL, 16);
1870
1871 /* SSID */
1872 memcpy(e->ssid, ssid, min(strlen(ssid), sizeof(e->ssid) - 1));
1873
1874 /* Mode (assume master) */
1875 e->mode = IWINFO_OPMODE_MASTER;
1876
1877 /* Channel */
1878 e->channel = nl80211_freq2channel(freq);
1879
1880 /* Signal */
1881 e->signal = rssi;
1882
1883 /* Quality */
1884 if (rssi < 0)
1885 {
1886 /* The cfg80211 wext compat layer assumes a signal range
1887 * of -110 dBm to -40 dBm, the quality value is derived
1888 * by adding 110 to the signal level */
1889 if (rssi < -110)
1890 rssi = -110;
1891 else if (rssi > -40)
1892 rssi = -40;
1893
1894 e->quality = (rssi + 110);
1895 }
1896 else
1897 {
1898 e->quality = rssi;
1899 }
1900
1901 /* Max. Quality */
1902 e->quality_max = qmax;
1903
1904 /* Crypto */
1905 nl80211_get_scancrypto(cipher, &e->crypto);
1906
1907 /* advance to next line */
1908 while (*res && *res++ != '\n');
1909
1910 count++;
1911 e++;
1912
1913 memset(ssid, 0, sizeof(ssid));
1914 memset(bssid, 0, sizeof(bssid));
1915 memset(cipher, 0, sizeof(cipher));
1916 }
1917
1918 *len = count * sizeof(struct iwinfo_scanlist_entry);
1919 return 0;
1920 }
1921 }
1922
1923 /* AP scan */
1924 else
1925 {
1926 /* Got a temp interface, don't create yet another one */
1927 if (!strncmp(ifname, "tmp.", 4))
1928 {
1929 if (!iwinfo_ifup(ifname))
1930 return -1;
1931
1932 nl80211_get_scanlist_nl(ifname, buf, len);
1933 iwinfo_ifdown(ifname);
1934 return 0;
1935 }
1936
1937 /* Spawn a new scan interface */
1938 else
1939 {
1940 if (!(res = nl80211_ifadd(ifname)))
1941 goto out;
1942
1943 if (!iwinfo_ifmac(res))
1944 goto out;
1945
1946 /* if we can take the new interface up, the driver supports an
1947 * additional interface and there's no need to tear down the ap */
1948 if (iwinfo_ifup(res))
1949 {
1950 nl80211_get_scanlist_nl(res, buf, len);
1951 iwinfo_ifdown(res);
1952 }
1953
1954 /* driver cannot create secondary interface, take down ap
1955 * during scan */
1956 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1957 {
1958 nl80211_get_scanlist_nl(res, buf, len);
1959 iwinfo_ifdown(res);
1960 iwinfo_ifup(ifname);
1961 nl80211_hostapd_hup(ifname);
1962 }
1963
1964 out:
1965 nl80211_ifdel(res);
1966 return 0;
1967 }
1968 }
1969
1970 return -1;
1971 }
1972
1973 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
1974 {
1975 int bands_remain, freqs_remain;
1976
1977 struct nl80211_array_buf *arr = arg;
1978 struct iwinfo_freqlist_entry *e = arr->buf;
1979
1980 struct nlattr **attr = nl80211_parse(msg);
1981 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1982 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1983 struct nlattr *band, *freq;
1984
1985 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1986 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1987 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1988 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1989 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1990 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1991 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1992 };
1993
1994 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1995 {
1996 nla_parse(bands, NL80211_BAND_ATTR_MAX,
1997 nla_data(band), nla_len(band), NULL);
1998
1999 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2000 {
2001 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2002 nla_data(freq), nla_len(freq), NULL);
2003
2004 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2005 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2006 continue;
2007
2008 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2009 e->channel = nl80211_freq2channel(e->mhz);
2010
2011 e->restricted = (
2012 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
2013 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
2014 freqs[NL80211_FREQUENCY_ATTR_RADAR]
2015 ) ? 1 : 0;
2016
2017 e++;
2018 arr->count++;
2019 }
2020 }
2021
2022 return NL_SKIP;
2023 }
2024
2025 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2026 {
2027 struct nl80211_msg_conveyor *req;
2028 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2029
2030 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2031 if (req)
2032 {
2033 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2034 nl80211_free(req);
2035 }
2036
2037 if (arr.count > 0)
2038 {
2039 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2040 return 0;
2041 }
2042
2043 return -1;
2044 }
2045
2046 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2047 {
2048 char *buf = arg;
2049 struct nlattr **attr = nl80211_parse(msg);
2050
2051 if (attr[NL80211_ATTR_REG_ALPHA2])
2052 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2053 else
2054 buf[0] = 0;
2055
2056 return NL_SKIP;
2057 }
2058
2059 int nl80211_get_country(const char *ifname, char *buf)
2060 {
2061 int rv = -1;
2062 struct nl80211_msg_conveyor *req;
2063
2064 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2065 if (req)
2066 {
2067 nl80211_send(req, nl80211_get_country_cb, buf);
2068 nl80211_free(req);
2069
2070 if (buf[0])
2071 rv = 0;
2072 }
2073
2074 return rv;
2075 }
2076
2077 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2078 {
2079 int i, count;
2080 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2081 const struct iwinfo_iso3166_label *l;
2082
2083 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2084 {
2085 e->iso3166 = l->iso3166;
2086 e->ccode[0] = (l->iso3166 / 256);
2087 e->ccode[1] = (l->iso3166 % 256);
2088 }
2089
2090 *len = (count * sizeof(struct iwinfo_country_entry));
2091 return 0;
2092 }
2093
2094 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
2095 {
2096 int *modes = arg;
2097 int bands_remain, freqs_remain;
2098 uint16_t caps = 0;
2099 struct nlattr **attr = nl80211_parse(msg);
2100 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2101 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2102 struct nlattr *band, *freq;
2103
2104 *modes = 0;
2105
2106 if (attr[NL80211_ATTR_WIPHY_BANDS])
2107 {
2108 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2109 {
2110 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2111 nla_data(band), nla_len(band), NULL);
2112
2113 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2114 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2115
2116 /* Treat any nonzero capability as 11n */
2117 if (caps > 0)
2118 *modes |= IWINFO_80211_N;
2119
2120 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2121 freqs_remain)
2122 {
2123 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2124 nla_data(freq), nla_len(freq), NULL);
2125
2126 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2127 continue;
2128
2129 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2130 {
2131 *modes |= IWINFO_80211_B;
2132 *modes |= IWINFO_80211_G;
2133 }
2134 else
2135 {
2136 *modes |= IWINFO_80211_A;
2137 }
2138 }
2139 }
2140 }
2141
2142 return NL_SKIP;
2143 }
2144
2145 int nl80211_get_hwmodelist(const char *ifname, int *buf)
2146 {
2147 struct nl80211_msg_conveyor *req;
2148
2149 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2150 if (req)
2151 {
2152 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
2153 nl80211_free(req);
2154 }
2155
2156 return *buf ? 0 : -1;
2157 }
2158
2159 int nl80211_get_mbssid_support(const char *ifname, int *buf)
2160 {
2161 /* Test whether we can create another interface */
2162 char *nif = nl80211_ifadd(ifname);
2163
2164 if (nif)
2165 {
2166 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
2167
2168 iwinfo_ifdown(nif);
2169 nl80211_ifdel(nif);
2170
2171 return 0;
2172 }
2173
2174 return -1;
2175 }
2176
2177 int nl80211_get_hardware_id(const char *ifname, char *buf)
2178 {
2179 int rv;
2180 char *res;
2181
2182 /* Got a radioX pseudo interface, find some interface on it or create one */
2183 if (!strncmp(ifname, "radio", 5))
2184 {
2185 /* Reuse existing interface */
2186 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2187 {
2188 rv = wext_get_hardware_id(res, buf);
2189 }
2190
2191 /* Need to spawn a temporary iface for finding IDs */
2192 else if ((res = nl80211_ifadd(ifname)) != NULL)
2193 {
2194 rv = wext_get_hardware_id(res, buf);
2195 nl80211_ifdel(res);
2196 }
2197 }
2198 else
2199 {
2200 rv = wext_get_hardware_id(ifname, buf);
2201 }
2202
2203 /* Failed to obtain hardware IDs, search board config */
2204 if (rv)
2205 {
2206 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2207 }
2208
2209 return rv;
2210 }
2211
2212 static const struct iwinfo_hardware_entry *
2213 nl80211_get_hardware_entry(const char *ifname)
2214 {
2215 struct iwinfo_hardware_id id;
2216
2217 if (nl80211_get_hardware_id(ifname, (char *)&id))
2218 return NULL;
2219
2220 return iwinfo_hardware(&id);
2221 }
2222
2223 int nl80211_get_hardware_name(const char *ifname, char *buf)
2224 {
2225 const struct iwinfo_hardware_entry *hw;
2226
2227 if (!(hw = nl80211_get_hardware_entry(ifname)))
2228 sprintf(buf, "Generic MAC80211");
2229 else
2230 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2231
2232 return 0;
2233 }
2234
2235 int nl80211_get_txpower_offset(const char *ifname, int *buf)
2236 {
2237 const struct iwinfo_hardware_entry *hw;
2238
2239 if (!(hw = nl80211_get_hardware_entry(ifname)))
2240 return -1;
2241
2242 *buf = hw->txpower_offset;
2243 return 0;
2244 }
2245
2246 int nl80211_get_frequency_offset(const char *ifname, int *buf)
2247 {
2248 const struct iwinfo_hardware_entry *hw;
2249
2250 if (!(hw = nl80211_get_hardware_entry(ifname)))
2251 return -1;
2252
2253 *buf = hw->frequency_offset;
2254 return 0;
2255 }
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