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iwinfo: replace more wext calls with nl80211 equivalents, attempt to infer nl80211...
[openwrt/openwrt.git] / package / network / utils / iwinfo / src / iwinfo_nl80211.c
1 /*
2 * iwinfo - Wireless Information Library - NL80211 Backend
3 *
4 * Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
5 *
6 * The iwinfo library is free software: you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
9 *
10 * The iwinfo library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 * See the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with the iwinfo library. If not, see http://www.gnu.org/licenses/.
17 *
18 * The signal handling code is derived from the official madwifi tools,
19 * wlanconfig.c in particular. The encryption property handling was
20 * inspired by the hostapd madwifi driver.
21 *
22 * Parts of this code are derived from the Linux iw utility.
23 */
24
25 #include "iwinfo/nl80211.h"
26 #include "iwinfo/wext.h"
27
28 #define min(x, y) ((x) < (y)) ? (x) : (y)
29
30 static struct nl80211_state *nls = NULL;
31
32 static int nl80211_init(void)
33 {
34 int err, fd;
35
36 if (!nls)
37 {
38 nls = malloc(sizeof(struct nl80211_state));
39 if (!nls) {
40 err = -ENOMEM;
41 goto err;
42 }
43
44 memset(nls, 0, sizeof(*nls));
45
46 nls->nl_sock = nl_socket_alloc();
47 if (!nls->nl_sock) {
48 err = -ENOMEM;
49 goto err;
50 }
51
52 if (genl_connect(nls->nl_sock)) {
53 err = -ENOLINK;
54 goto err;
55 }
56
57 fd = nl_socket_get_fd(nls->nl_sock);
58 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
59 err = -EINVAL;
60 goto err;
61 }
62
63 if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
64 err = -ENOMEM;
65 goto err;
66 }
67
68 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
69 if (!nls->nl80211) {
70 err = -ENOENT;
71 goto err;
72 }
73
74 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
75 if (!nls->nlctrl) {
76 err = -ENOENT;
77 goto err;
78 }
79 }
80
81 return 0;
82
83
84 err:
85 nl80211_close();
86 return err;
87 }
88
89
90 static int nl80211_msg_error(struct sockaddr_nl *nla,
91 struct nlmsgerr *err, void *arg)
92 {
93 int *ret = arg;
94 *ret = err->error;
95 return NL_STOP;
96 }
97
98 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
99 {
100 int *ret = arg;
101 *ret = 0;
102 return NL_SKIP;
103 }
104
105 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
106 {
107 int *ret = arg;
108 *ret = 0;
109 return NL_STOP;
110 }
111
112 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
113 {
114 return NL_SKIP;
115 }
116
117 static void nl80211_free(struct nl80211_msg_conveyor *cv)
118 {
119 if (cv)
120 {
121 if (cv->cb)
122 nl_cb_put(cv->cb);
123
124 if (cv->msg)
125 nlmsg_free(cv->msg);
126
127 cv->cb = NULL;
128 cv->msg = NULL;
129 }
130 }
131
132 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
133 int cmd, int flags)
134 {
135 static struct nl80211_msg_conveyor cv;
136
137 struct nl_msg *req = NULL;
138 struct nl_cb *cb = NULL;
139
140 req = nlmsg_alloc();
141 if (!req)
142 goto err;
143
144 cb = nl_cb_alloc(NL_CB_DEFAULT);
145 if (!cb)
146 goto err;
147
148 genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
149
150 cv.msg = req;
151 cv.cb = cb;
152
153 return &cv;
154
155 err:
156 nla_put_failure:
157 if (cb)
158 nl_cb_put(cb);
159
160 if (req)
161 nlmsg_free(req);
162
163 return NULL;
164 }
165
166 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
167 {
168 if (nl80211_init() < 0)
169 return NULL;
170
171 return nl80211_new(nls->nlctrl, cmd, flags);
172 }
173
174 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
175 int cmd, int flags)
176 {
177 int ifidx = -1, phyidx = -1;
178 struct nl80211_msg_conveyor *cv;
179
180 if (nl80211_init() < 0)
181 return NULL;
182
183 if (!strncmp(ifname, "phy", 3))
184 phyidx = atoi(&ifname[3]);
185 else if (!strncmp(ifname, "radio", 5))
186 phyidx = atoi(&ifname[5]);
187 else if (!strncmp(ifname, "mon.", 4))
188 ifidx = if_nametoindex(&ifname[4]);
189 else
190 ifidx = if_nametoindex(ifname);
191
192 if ((ifidx < 0) && (phyidx < 0))
193 return NULL;
194
195 cv = nl80211_new(nls->nl80211, cmd, flags);
196 if (!cv)
197 return NULL;
198
199 if (ifidx > -1)
200 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
201
202 if (phyidx > -1)
203 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
204
205 return cv;
206
207 nla_put_failure:
208 nl80211_free(cv);
209 return NULL;
210 }
211
212 static struct nl80211_msg_conveyor * nl80211_send(
213 struct nl80211_msg_conveyor *cv,
214 int (*cb_func)(struct nl_msg *, void *), void *cb_arg
215 ) {
216 static struct nl80211_msg_conveyor rcv;
217 int err = 1;
218
219 if (cb_func)
220 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
221 else
222 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
223
224 if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
225 goto err;
226
227 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
228 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
229 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
230
231 while (err > 0)
232 nl_recvmsgs(nls->nl_sock, cv->cb);
233
234 return &rcv;
235
236 err:
237 nl_cb_put(cv->cb);
238 nlmsg_free(cv->msg);
239
240 return NULL;
241 }
242
243 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
244 {
245 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
246 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
247
248 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
249 genlmsg_attrlen(gnlh, 0), NULL);
250
251 return attr;
252 }
253
254
255 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
256 {
257 struct nl80211_group_conveyor *cv = arg;
258
259 struct nlattr **attr = nl80211_parse(msg);
260 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
261 struct nlattr *mgrp;
262 int mgrpidx;
263
264 if (!attr[CTRL_ATTR_MCAST_GROUPS])
265 return NL_SKIP;
266
267 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
268 {
269 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
270 nla_data(mgrp), nla_len(mgrp), NULL);
271
272 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
273 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
274 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
275 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
276 {
277 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
278 break;
279 }
280 }
281
282 return NL_SKIP;
283 }
284
285 static int nl80211_subscribe(const char *family, const char *group)
286 {
287 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
288 struct nl80211_msg_conveyor *req;
289
290 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
291 if (req)
292 {
293 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
294 nl80211_send(req, nl80211_subscribe_cb, &cv);
295
296 nla_put_failure:
297 nl80211_free(req);
298 }
299
300 return nl_socket_add_membership(nls->nl_sock, cv.id);
301 }
302
303
304 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
305 {
306 struct nl80211_event_conveyor *cv = arg;
307 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
308
309 if (gnlh->cmd == cv->wait)
310 cv->recv = gnlh->cmd;
311
312 return NL_SKIP;
313 }
314
315 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
316 {
317 return NL_OK;
318 }
319
320 static int nl80211_wait(const char *family, const char *group, int cmd)
321 {
322 struct nl80211_event_conveyor cv = { .wait = cmd };
323 struct nl_cb *cb;
324
325 if (nl80211_subscribe(family, group))
326 return -ENOENT;
327
328 cb = nl_cb_alloc(NL_CB_DEFAULT);
329
330 if (!cb)
331 return -ENOMEM;
332
333 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
334 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
335
336 while (!cv.recv)
337 nl_recvmsgs(nls->nl_sock, cb);
338
339 nl_cb_put(cb);
340
341 return 0;
342 }
343
344
345 static int nl80211_freq2channel(int freq)
346 {
347 if (freq == 2484)
348 return 14;
349
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 char *res;
997 char path[PATH_MAX];
998
999 res = nl80211_ifname2phy(ifname);
1000 snprintf(path, sizeof(path), "/sys/kernel/debug/ieee80211/%s/power",
1001 res ? res : ifname);
1002
1003 if ((*buf = nl80211_readint(path)) > -1)
1004 return 0;
1005
1006 return wext_get_txpower(ifname, buf);
1007 }
1008
1009
1010 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1011 {
1012 int8_t dbm;
1013 int16_t mbit;
1014 struct nl80211_rssi_rate *rr = arg;
1015 struct nlattr **attr = nl80211_parse(msg);
1016 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1017 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1018
1019 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1020 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1021 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1022 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1023 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1024 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1025 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1026 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1027 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1028 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1029 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1030 };
1031
1032 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1033 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1034 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1035 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1036 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1037 };
1038
1039 if (attr[NL80211_ATTR_STA_INFO])
1040 {
1041 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1042 attr[NL80211_ATTR_STA_INFO], stats_policy))
1043 {
1044 if (sinfo[NL80211_STA_INFO_SIGNAL])
1045 {
1046 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1047 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1048 }
1049
1050 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1051 {
1052 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1053 sinfo[NL80211_STA_INFO_TX_BITRATE],
1054 rate_policy))
1055 {
1056 if (rinfo[NL80211_RATE_INFO_BITRATE])
1057 {
1058 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1059 rr->rate = rr->rate
1060 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1061 }
1062 }
1063 }
1064 }
1065 }
1066
1067 return NL_SKIP;
1068 }
1069
1070 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1071 {
1072 DIR *d;
1073 struct dirent *de;
1074 struct nl80211_msg_conveyor *req;
1075
1076 r->rssi = 0;
1077 r->rate = 0;
1078
1079 if ((d = opendir("/sys/class/net")) != NULL)
1080 {
1081 while ((de = readdir(d)) != NULL)
1082 {
1083 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1084 (!de->d_name[strlen(ifname)] ||
1085 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1086 {
1087 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1088 NLM_F_DUMP);
1089
1090 if (req)
1091 {
1092 nl80211_send(req, nl80211_fill_signal_cb, r);
1093 nl80211_free(req);
1094 }
1095 }
1096 }
1097
1098 closedir(d);
1099 }
1100 }
1101
1102 int nl80211_get_bitrate(const char *ifname, int *buf)
1103 {
1104 struct nl80211_rssi_rate rr;
1105
1106 nl80211_fill_signal(ifname, &rr);
1107
1108 if (rr.rate)
1109 {
1110 *buf = (rr.rate * 100);
1111 return 0;
1112 }
1113
1114 return -1;
1115 }
1116
1117 int nl80211_get_signal(const char *ifname, int *buf)
1118 {
1119 struct nl80211_rssi_rate rr;
1120
1121 nl80211_fill_signal(ifname, &rr);
1122
1123 if (rr.rssi)
1124 {
1125 *buf = rr.rssi;
1126 return 0;
1127 }
1128
1129 return -1;
1130 }
1131
1132 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1133 {
1134 int8_t *noise = arg;
1135 struct nlattr **tb = nl80211_parse(msg);
1136 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1137
1138 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1139 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1140 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1141 };
1142
1143 if (!tb[NL80211_ATTR_SURVEY_INFO])
1144 return NL_SKIP;
1145
1146 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1147 tb[NL80211_ATTR_SURVEY_INFO], sp))
1148 return NL_SKIP;
1149
1150 if (!si[NL80211_SURVEY_INFO_NOISE])
1151 return NL_SKIP;
1152
1153 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1154 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1155
1156 return NL_SKIP;
1157 }
1158
1159
1160 int nl80211_get_noise(const char *ifname, int *buf)
1161 {
1162 int8_t noise;
1163 struct nl80211_msg_conveyor *req;
1164
1165 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1166 if (req)
1167 {
1168 noise = 0;
1169
1170 nl80211_send(req, nl80211_get_noise_cb, &noise);
1171 nl80211_free(req);
1172
1173 if (noise)
1174 {
1175 *buf = noise;
1176 return 0;
1177 }
1178 }
1179
1180 return -1;
1181 }
1182
1183 int nl80211_get_quality(const char *ifname, int *buf)
1184 {
1185 int signal;
1186
1187 if (!nl80211_get_signal(ifname, &signal))
1188 {
1189 /* A positive signal level is usually just a quality
1190 * value, pass through as-is */
1191 if (signal >= 0)
1192 {
1193 *buf = signal;
1194 }
1195
1196 /* The cfg80211 wext compat layer assumes a signal range
1197 * of -110 dBm to -40 dBm, the quality value is derived
1198 * by adding 110 to the signal level */
1199 else
1200 {
1201 if (signal < -110)
1202 signal = -110;
1203 else if (signal > -40)
1204 signal = -40;
1205
1206 *buf = (signal + 110);
1207 }
1208
1209 return 0;
1210 }
1211
1212 return -1;
1213 }
1214
1215 int nl80211_get_quality_max(const char *ifname, int *buf)
1216 {
1217 /* The cfg80211 wext compat layer assumes a maximum
1218 * quality of 70 */
1219 *buf = 70;
1220
1221 return 0;
1222 }
1223
1224 int nl80211_get_encryption(const char *ifname, char *buf)
1225 {
1226 int i;
1227 char k[9];
1228 char *val, *res;
1229 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1230
1231 /* WPA supplicant */
1232 if ((res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
1233 (val = nl80211_getval(NULL, res, "pairwise_cipher")))
1234 {
1235 /* WEP */
1236 if (strstr(val, "WEP"))
1237 {
1238 if (strstr(val, "WEP-40"))
1239 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1240
1241 else if (strstr(val, "WEP-104"))
1242 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1243
1244 c->enabled = 1;
1245 c->group_ciphers = c->pair_ciphers;
1246
1247 c->auth_suites |= IWINFO_KMGMT_NONE;
1248 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1249 }
1250
1251 /* WPA */
1252 else
1253 {
1254 if (strstr(val, "TKIP"))
1255 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1256
1257 else if (strstr(val, "CCMP"))
1258 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1259
1260 else if (strstr(val, "NONE"))
1261 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1262
1263 else if (strstr(val, "WEP-40"))
1264 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1265
1266 else if (strstr(val, "WEP-104"))
1267 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1268
1269
1270 if ((val = nl80211_getval(NULL, res, "group_cipher")))
1271 {
1272 if (strstr(val, "TKIP"))
1273 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1274
1275 else if (strstr(val, "CCMP"))
1276 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1277
1278 else if (strstr(val, "NONE"))
1279 c->group_ciphers |= IWINFO_CIPHER_NONE;
1280
1281 else if (strstr(val, "WEP-40"))
1282 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1283
1284 else if (strstr(val, "WEP-104"))
1285 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1286 }
1287
1288
1289 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
1290 {
1291 if (strstr(val, "WPA2"))
1292 c->wpa_version = 2;
1293
1294 else if (strstr(val, "WPA"))
1295 c->wpa_version = 1;
1296
1297
1298 if (strstr(val, "PSK"))
1299 c->auth_suites |= IWINFO_KMGMT_PSK;
1300
1301 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
1302 c->auth_suites |= IWINFO_KMGMT_8021x;
1303
1304 else if (strstr(val, "NONE"))
1305 c->auth_suites |= IWINFO_KMGMT_NONE;
1306 }
1307
1308 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1309 }
1310
1311 return 0;
1312 }
1313
1314 /* Hostapd */
1315 else if ((res = nl80211_hostapd_info(ifname)))
1316 {
1317 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
1318 c->wpa_version = atoi(val);
1319
1320 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
1321
1322 if (!val || strstr(val, "PSK"))
1323 c->auth_suites |= IWINFO_KMGMT_PSK;
1324
1325 if (val && strstr(val, "EAP"))
1326 c->auth_suites |= IWINFO_KMGMT_8021x;
1327
1328 if (val && strstr(val, "NONE"))
1329 c->auth_suites |= IWINFO_KMGMT_NONE;
1330
1331 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
1332 {
1333 if (strstr(val, "TKIP"))
1334 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1335
1336 if (strstr(val, "CCMP"))
1337 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1338
1339 if (strstr(val, "NONE"))
1340 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1341 }
1342
1343 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1344 {
1345 switch(atoi(val)) {
1346 case 1:
1347 c->auth_algs |= IWINFO_AUTH_OPEN;
1348 break;
1349
1350 case 2:
1351 c->auth_algs |= IWINFO_AUTH_SHARED;
1352 break;
1353
1354 case 3:
1355 c->auth_algs |= IWINFO_AUTH_OPEN;
1356 c->auth_algs |= IWINFO_AUTH_SHARED;
1357 break;
1358
1359 default:
1360 break;
1361 }
1362
1363 for (i = 0; i < 4; i++)
1364 {
1365 snprintf(k, sizeof(k), "wep_key%d", i);
1366
1367 if ((val = nl80211_getval(ifname, res, k)))
1368 {
1369 if ((strlen(val) == 5) || (strlen(val) == 10))
1370 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1371
1372 else if ((strlen(val) == 13) || (strlen(val) == 26))
1373 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1374 }
1375 }
1376 }
1377
1378 c->group_ciphers = c->pair_ciphers;
1379 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1380
1381 return 0;
1382 }
1383
1384 return -1;
1385 }
1386
1387
1388 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1389 {
1390 struct nl80211_array_buf *arr = arg;
1391 struct iwinfo_assoclist_entry *e = arr->buf;
1392 struct nlattr **attr = nl80211_parse(msg);
1393 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1394 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1395
1396 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1397 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1398 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1399 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1400 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1401 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1402 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1403 };
1404
1405 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1406 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1407 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1408 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1409 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1410 };
1411
1412 /* advance to end of array */
1413 e += arr->count;
1414 memset(e, 0, sizeof(*e));
1415
1416 if (attr[NL80211_ATTR_MAC])
1417 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1418
1419 if (attr[NL80211_ATTR_STA_INFO] &&
1420 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1421 attr[NL80211_ATTR_STA_INFO], stats_policy))
1422 {
1423 if (sinfo[NL80211_STA_INFO_SIGNAL])
1424 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1425
1426 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1427 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1428
1429 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1430 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1431
1432 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1433 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1434
1435 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1436 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1437 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1438 {
1439 if (rinfo[NL80211_RATE_INFO_BITRATE])
1440 e->rx_rate.rate =
1441 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1442
1443 if (rinfo[NL80211_RATE_INFO_MCS])
1444 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1445
1446 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1447 e->rx_rate.is_40mhz = 1;
1448
1449 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1450 e->rx_rate.is_short_gi = 1;
1451 }
1452
1453 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1454 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1455 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1456 {
1457 if (rinfo[NL80211_RATE_INFO_BITRATE])
1458 e->tx_rate.rate =
1459 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1460
1461 if (rinfo[NL80211_RATE_INFO_MCS])
1462 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1463
1464 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1465 e->tx_rate.is_40mhz = 1;
1466
1467 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1468 e->tx_rate.is_short_gi = 1;
1469 }
1470 }
1471
1472 e->noise = 0; /* filled in by caller */
1473 arr->count++;
1474
1475 return NL_SKIP;
1476 }
1477
1478 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1479 {
1480 DIR *d;
1481 int i, noise = 0;
1482 struct dirent *de;
1483 struct nl80211_msg_conveyor *req;
1484 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1485 struct iwinfo_assoclist_entry *e;
1486
1487 if ((d = opendir("/sys/class/net")) != NULL)
1488 {
1489 while ((de = readdir(d)) != NULL)
1490 {
1491 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1492 (!de->d_name[strlen(ifname)] ||
1493 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1494 {
1495 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1496 NLM_F_DUMP);
1497
1498 if (req)
1499 {
1500 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1501 nl80211_free(req);
1502 }
1503 }
1504 }
1505
1506 closedir(d);
1507
1508 if (!nl80211_get_noise(ifname, &noise))
1509 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1510 e->noise = noise;
1511
1512 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1513 return 0;
1514 }
1515
1516 return -1;
1517 }
1518
1519 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1520 {
1521 int *dbm_max = arg;
1522 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1523
1524 struct nlattr **attr = nl80211_parse(msg);
1525 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1526 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1527 struct nlattr *band, *freq;
1528
1529 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1530 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1531 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1532 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1533 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1534 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1535 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1536 };
1537
1538 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1539 *dbm_max = -1;
1540
1541 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1542 {
1543 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1544 nla_len(band), NULL);
1545
1546 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1547 {
1548 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1549 nla_data(freq), nla_len(freq), freq_policy);
1550
1551 ch_cmp = nl80211_freq2channel(nla_get_u32(
1552 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1553
1554 if ((!ch_cur || (ch_cmp == ch_cur)) &&
1555 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1556 {
1557 *dbm_max = (int)(0.01 * nla_get_u32(
1558 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1559
1560 break;
1561 }
1562 }
1563 }
1564
1565 return NL_SKIP;
1566 }
1567
1568 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1569 {
1570 int ch_cur;
1571 int dbm_max = -1, dbm_cur, dbm_cnt;
1572 struct nl80211_msg_conveyor *req;
1573 struct iwinfo_txpwrlist_entry entry;
1574
1575 if (nl80211_get_channel(ifname, &ch_cur))
1576 ch_cur = 0;
1577
1578 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1579 if (req)
1580 {
1581 /* initialize the value pointer with channel for callback */
1582 dbm_max = ch_cur;
1583
1584 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1585 nl80211_free(req);
1586 }
1587
1588 if (dbm_max > 0)
1589 {
1590 for (dbm_cur = 0, dbm_cnt = 0;
1591 dbm_cur < dbm_max;
1592 dbm_cur++, dbm_cnt++)
1593 {
1594 entry.dbm = dbm_cur;
1595 entry.mw = iwinfo_dbm2mw(dbm_cur);
1596
1597 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1598 }
1599
1600 entry.dbm = dbm_max;
1601 entry.mw = iwinfo_dbm2mw(dbm_max);
1602
1603 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1604 dbm_cnt++;
1605
1606 *len = dbm_cnt * sizeof(entry);
1607 return 0;
1608 }
1609
1610 return -1;
1611 }
1612
1613 static void nl80211_get_scancrypto(const char *spec,
1614 struct iwinfo_crypto_entry *c)
1615 {
1616 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1617 {
1618 c->enabled = 1;
1619
1620 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1621 c->wpa_version = 3;
1622
1623 else if (strstr(spec, "WPA2"))
1624 c->wpa_version = 2;
1625
1626 else if (strstr(spec, "WPA"))
1627 c->wpa_version = 1;
1628
1629 else if (strstr(spec, "WEP"))
1630 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1631
1632
1633 if (strstr(spec, "PSK"))
1634 c->auth_suites |= IWINFO_KMGMT_PSK;
1635
1636 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1637 c->auth_suites |= IWINFO_KMGMT_8021x;
1638
1639 if (strstr(spec, "WPA-NONE"))
1640 c->auth_suites |= IWINFO_KMGMT_NONE;
1641
1642
1643 if (strstr(spec, "TKIP"))
1644 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1645
1646 if (strstr(spec, "CCMP"))
1647 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1648
1649 if (strstr(spec, "WEP-40"))
1650 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1651
1652 if (strstr(spec, "WEP-104"))
1653 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1654
1655 c->group_ciphers = c->pair_ciphers;
1656 }
1657 else
1658 {
1659 c->enabled = 0;
1660 }
1661 }
1662
1663
1664 struct nl80211_scanlist {
1665 struct iwinfo_scanlist_entry *e;
1666 int len;
1667 };
1668
1669
1670 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1671 struct iwinfo_scanlist_entry *e)
1672 {
1673 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1674 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1675 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1676
1677 while (ielen >= 2 && ielen >= ie[1])
1678 {
1679 switch (ie[0])
1680 {
1681 case 0: /* SSID */
1682 memcpy(e->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1683 break;
1684
1685 case 48: /* RSN */
1686 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1687 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1688 break;
1689
1690 case 221: /* Vendor */
1691 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1692 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1693 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1694 break;
1695 }
1696
1697 ielen -= ie[1] + 2;
1698 ie += ie[1] + 2;
1699 }
1700 }
1701
1702 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
1703 {
1704 int8_t rssi;
1705 uint16_t caps;
1706
1707 struct nl80211_scanlist *sl = arg;
1708 struct nlattr **tb = nl80211_parse(msg);
1709 struct nlattr *bss[NL80211_BSS_MAX + 1];
1710
1711 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1712 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1713 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1714 [NL80211_BSS_BSSID] = { },
1715 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1716 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1717 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
1718 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1719 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1720 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1721 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1722 [NL80211_BSS_BEACON_IES] = { },
1723 };
1724
1725 if (!tb[NL80211_ATTR_BSS] ||
1726 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1727 bss_policy) ||
1728 !bss[NL80211_BSS_BSSID])
1729 {
1730 return NL_SKIP;
1731 }
1732
1733 if (bss[NL80211_BSS_CAPABILITY])
1734 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1735 else
1736 caps = 0;
1737
1738 memset(sl->e, 0, sizeof(*sl->e));
1739 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
1740
1741 if (caps & (1<<1))
1742 sl->e->mode = IWINFO_OPMODE_ADHOC;
1743 else
1744 sl->e->mode = IWINFO_OPMODE_MASTER;
1745
1746 if (caps & (1<<4))
1747 sl->e->crypto.enabled = 1;
1748
1749 if (bss[NL80211_BSS_FREQUENCY])
1750 sl->e->channel = nl80211_freq2channel(nla_get_u32(
1751 bss[NL80211_BSS_FREQUENCY]));
1752
1753 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
1754 nl80211_get_scanlist_ie(bss, sl->e);
1755
1756 if (bss[NL80211_BSS_SIGNAL_MBM])
1757 {
1758 sl->e->signal =
1759 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
1760
1761 rssi = sl->e->signal - 0x100;
1762
1763 if (rssi < -110)
1764 rssi = -110;
1765 else if (rssi > -40)
1766 rssi = -40;
1767
1768 sl->e->quality = (rssi + 110);
1769 sl->e->quality_max = 70;
1770 }
1771
1772 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
1773 {
1774 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1775 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
1776 }
1777
1778 sl->e++;
1779 sl->len++;
1780
1781 return NL_SKIP;
1782 }
1783
1784 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
1785 {
1786 struct nl80211_msg_conveyor *req;
1787 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
1788
1789 req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
1790 if (req)
1791 {
1792 nl80211_send(req, NULL, NULL);
1793 nl80211_free(req);
1794 }
1795
1796 nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
1797
1798 req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1799 if (req)
1800 {
1801 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
1802 nl80211_free(req);
1803 }
1804
1805 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
1806 return *len ? 0 : -1;
1807 }
1808
1809 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1810 {
1811 int freq, rssi, qmax, count;
1812 char *res;
1813 char ssid[128] = { 0 };
1814 char bssid[18] = { 0 };
1815 char cipher[256] = { 0 };
1816
1817 /* Got a radioX pseudo interface, find some interface on it or create one */
1818 if (!strncmp(ifname, "radio", 5))
1819 {
1820 /* Reuse existing interface */
1821 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1822 {
1823 return nl80211_get_scanlist(res, buf, len);
1824 }
1825
1826 /* Need to spawn a temporary iface for scanning */
1827 else if ((res = nl80211_ifadd(ifname)) != NULL)
1828 {
1829 count = nl80211_get_scanlist(res, buf, len);
1830 nl80211_ifdel(res);
1831 return count;
1832 }
1833 }
1834
1835 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1836
1837 /* WPA supplicant */
1838 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1839 {
1840 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1841 {
1842 nl80211_get_quality_max(ifname, &qmax);
1843
1844 /* skip header line */
1845 while (*res++ != '\n');
1846
1847 count = 0;
1848
1849 while (sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1850 bssid, &freq, &rssi, cipher, ssid) > 0)
1851 {
1852 /* BSSID */
1853 e->mac[0] = strtol(&bssid[0], NULL, 16);
1854 e->mac[1] = strtol(&bssid[3], NULL, 16);
1855 e->mac[2] = strtol(&bssid[6], NULL, 16);
1856 e->mac[3] = strtol(&bssid[9], NULL, 16);
1857 e->mac[4] = strtol(&bssid[12], NULL, 16);
1858 e->mac[5] = strtol(&bssid[15], NULL, 16);
1859
1860 /* SSID */
1861 memcpy(e->ssid, ssid, min(strlen(ssid), sizeof(e->ssid) - 1));
1862
1863 /* Mode (assume master) */
1864 e->mode = IWINFO_OPMODE_MASTER;
1865
1866 /* Channel */
1867 e->channel = nl80211_freq2channel(freq);
1868
1869 /* Signal */
1870 e->signal = rssi;
1871
1872 /* Quality */
1873 if (rssi < 0)
1874 {
1875 /* The cfg80211 wext compat layer assumes a signal range
1876 * of -110 dBm to -40 dBm, the quality value is derived
1877 * by adding 110 to the signal level */
1878 if (rssi < -110)
1879 rssi = -110;
1880 else if (rssi > -40)
1881 rssi = -40;
1882
1883 e->quality = (rssi + 110);
1884 }
1885 else
1886 {
1887 e->quality = rssi;
1888 }
1889
1890 /* Max. Quality */
1891 e->quality_max = qmax;
1892
1893 /* Crypto */
1894 nl80211_get_scancrypto(cipher, &e->crypto);
1895
1896 /* advance to next line */
1897 while (*res && *res++ != '\n');
1898
1899 count++;
1900 e++;
1901
1902 memset(ssid, 0, sizeof(ssid));
1903 memset(bssid, 0, sizeof(bssid));
1904 memset(cipher, 0, sizeof(cipher));
1905 }
1906
1907 *len = count * sizeof(struct iwinfo_scanlist_entry);
1908 return 0;
1909 }
1910 }
1911
1912 /* AP scan */
1913 else
1914 {
1915 /* Got a temp interface, don't create yet another one */
1916 if (!strncmp(ifname, "tmp.", 4))
1917 {
1918 if (!iwinfo_ifup(ifname))
1919 return -1;
1920
1921 nl80211_get_scanlist_nl(ifname, buf, len);
1922 iwinfo_ifdown(ifname);
1923 return 0;
1924 }
1925
1926 /* Spawn a new scan interface */
1927 else
1928 {
1929 if (!(res = nl80211_ifadd(ifname)))
1930 goto out;
1931
1932 if (!iwinfo_ifmac(res))
1933 goto out;
1934
1935 /* if we can take the new interface up, the driver supports an
1936 * additional interface and there's no need to tear down the ap */
1937 if (iwinfo_ifup(res))
1938 {
1939 nl80211_get_scanlist_nl(res, buf, len);
1940 iwinfo_ifdown(res);
1941 }
1942
1943 /* driver cannot create secondary interface, take down ap
1944 * during scan */
1945 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1946 {
1947 nl80211_get_scanlist_nl(res, buf, len);
1948 iwinfo_ifdown(res);
1949 iwinfo_ifup(ifname);
1950 nl80211_hostapd_hup(ifname);
1951 }
1952
1953 out:
1954 nl80211_ifdel(res);
1955 return 0;
1956 }
1957 }
1958
1959 return -1;
1960 }
1961
1962 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
1963 {
1964 int bands_remain, freqs_remain;
1965
1966 struct nl80211_array_buf *arr = arg;
1967 struct iwinfo_freqlist_entry *e = arr->buf;
1968
1969 struct nlattr **attr = nl80211_parse(msg);
1970 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1971 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1972 struct nlattr *band, *freq;
1973
1974 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1975 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1976 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1977 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1978 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1979 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1980 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1981 };
1982
1983 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1984 {
1985 nla_parse(bands, NL80211_BAND_ATTR_MAX,
1986 nla_data(band), nla_len(band), NULL);
1987
1988 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1989 {
1990 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1991 nla_data(freq), nla_len(freq), NULL);
1992
1993 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1994 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
1995 continue;
1996
1997 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1998 e->channel = nl80211_freq2channel(e->mhz);
1999
2000 e->restricted = (
2001 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
2002 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
2003 freqs[NL80211_FREQUENCY_ATTR_RADAR]
2004 ) ? 1 : 0;
2005
2006 e++;
2007 arr->count++;
2008 }
2009 }
2010
2011 return NL_SKIP;
2012 }
2013
2014 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2015 {
2016 struct nl80211_msg_conveyor *req;
2017 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2018
2019 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2020 if (req)
2021 {
2022 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2023 nl80211_free(req);
2024 }
2025
2026 if (arr.count > 0)
2027 {
2028 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2029 return 0;
2030 }
2031
2032 return -1;
2033 }
2034
2035 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2036 {
2037 char *buf = arg;
2038 struct nlattr **attr = nl80211_parse(msg);
2039
2040 if (attr[NL80211_ATTR_REG_ALPHA2])
2041 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2042 else
2043 buf[0] = 0;
2044
2045 return NL_SKIP;
2046 }
2047
2048 int nl80211_get_country(const char *ifname, char *buf)
2049 {
2050 int rv = -1;
2051 struct nl80211_msg_conveyor *req;
2052
2053 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2054 if (req)
2055 {
2056 nl80211_send(req, nl80211_get_country_cb, buf);
2057 nl80211_free(req);
2058
2059 if (buf[0])
2060 rv = 0;
2061 }
2062
2063 return rv;
2064 }
2065
2066 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2067 {
2068 int i, count;
2069 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2070 const struct iwinfo_iso3166_label *l;
2071
2072 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2073 {
2074 e->iso3166 = l->iso3166;
2075 e->ccode[0] = (l->iso3166 / 256);
2076 e->ccode[1] = (l->iso3166 % 256);
2077 }
2078
2079 *len = (count * sizeof(struct iwinfo_country_entry));
2080 return 0;
2081 }
2082
2083 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
2084 {
2085 int *modes = arg;
2086 int bands_remain, freqs_remain;
2087 uint16_t caps = 0;
2088 struct nlattr **attr = nl80211_parse(msg);
2089 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2090 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2091 struct nlattr *band, *freq;
2092
2093 *modes = 0;
2094
2095 if (attr[NL80211_ATTR_WIPHY_BANDS])
2096 {
2097 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2098 {
2099 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2100 nla_data(band), nla_len(band), NULL);
2101
2102 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2103 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2104
2105 /* Treat any nonzero capability as 11n */
2106 if (caps > 0)
2107 *modes |= IWINFO_80211_N;
2108
2109 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2110 freqs_remain)
2111 {
2112 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2113 nla_data(freq), nla_len(freq), NULL);
2114
2115 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2116 continue;
2117
2118 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2119 {
2120 *modes |= IWINFO_80211_B;
2121 *modes |= IWINFO_80211_G;
2122 }
2123 else
2124 {
2125 *modes |= IWINFO_80211_A;
2126 }
2127 }
2128 }
2129 }
2130
2131 return NL_SKIP;
2132 }
2133
2134 int nl80211_get_hwmodelist(const char *ifname, int *buf)
2135 {
2136 struct nl80211_msg_conveyor *req;
2137
2138 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2139 if (req)
2140 {
2141 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
2142 nl80211_free(req);
2143 }
2144
2145 return *buf ? 0 : -1;
2146 }
2147
2148 int nl80211_get_mbssid_support(const char *ifname, int *buf)
2149 {
2150 /* Test whether we can create another interface */
2151 char *nif = nl80211_ifadd(ifname);
2152
2153 if (nif)
2154 {
2155 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
2156
2157 iwinfo_ifdown(nif);
2158 nl80211_ifdel(nif);
2159
2160 return 0;
2161 }
2162
2163 return -1;
2164 }
2165
2166 int nl80211_get_hardware_id(const char *ifname, char *buf)
2167 {
2168 int rv;
2169 char *res;
2170
2171 /* Got a radioX pseudo interface, find some interface on it or create one */
2172 if (!strncmp(ifname, "radio", 5))
2173 {
2174 /* Reuse existing interface */
2175 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2176 {
2177 rv = wext_get_hardware_id(res, buf);
2178 }
2179
2180 /* Need to spawn a temporary iface for finding IDs */
2181 else if ((res = nl80211_ifadd(ifname)) != NULL)
2182 {
2183 rv = wext_get_hardware_id(res, buf);
2184 nl80211_ifdel(res);
2185 }
2186 }
2187 else
2188 {
2189 rv = wext_get_hardware_id(ifname, buf);
2190 }
2191
2192 /* Failed to obtain hardware IDs, search board config */
2193 if (rv)
2194 {
2195 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2196 }
2197
2198 return rv;
2199 }
2200
2201 static const struct iwinfo_hardware_entry *
2202 nl80211_get_hardware_entry(const char *ifname)
2203 {
2204 struct iwinfo_hardware_id id;
2205
2206 if (nl80211_get_hardware_id(ifname, (char *)&id))
2207 return NULL;
2208
2209 return iwinfo_hardware(&id);
2210 }
2211
2212 int nl80211_get_hardware_name(const char *ifname, char *buf)
2213 {
2214 const struct iwinfo_hardware_entry *hw;
2215
2216 if (!(hw = nl80211_get_hardware_entry(ifname)))
2217 sprintf(buf, "Generic MAC80211");
2218 else
2219 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2220
2221 return 0;
2222 }
2223
2224 int nl80211_get_txpower_offset(const char *ifname, int *buf)
2225 {
2226 const struct iwinfo_hardware_entry *hw;
2227
2228 if (!(hw = nl80211_get_hardware_entry(ifname)))
2229 return -1;
2230
2231 *buf = hw->txpower_offset;
2232 return 0;
2233 }
2234
2235 int nl80211_get_frequency_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->frequency_offset;
2243 return 0;
2244 }
OpenWrt Source Repository