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