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051d34dd1c54cbbd102a6eecb82af7ff11ee708a
[openwrt/staging/mkresin.git] / package / network / utils / iwinfo / src / iwinfo_nl80211.c
1 /*
2 * iwinfo - Wireless Information Library - NL80211 Backend
3 *
4 * Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
5 *
6 * The iwinfo library is free software: you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
9 *
10 * The iwinfo library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 * See the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with the iwinfo library. If not, see http://www.gnu.org/licenses/.
17 *
18 * The signal handling code is derived from the official madwifi tools,
19 * wlanconfig.c in particular. The encryption property handling was
20 * inspired by the hostapd madwifi driver.
21 *
22 * Parts of this code are derived from the Linux iw utility.
23 */
24
25 #include "iwinfo/nl80211.h"
26 #include "iwinfo/wext.h"
27
28 #define min(x, y) ((x) < (y)) ? (x) : (y)
29
30 static struct nl80211_state *nls = NULL;
31
32 static int nl80211_init(void)
33 {
34 int err, fd;
35
36 if (!nls)
37 {
38 nls = malloc(sizeof(struct nl80211_state));
39 if (!nls) {
40 err = -ENOMEM;
41 goto err;
42 }
43
44 memset(nls, 0, sizeof(*nls));
45
46 nls->nl_sock = nl_socket_alloc();
47 if (!nls->nl_sock) {
48 err = -ENOMEM;
49 goto err;
50 }
51
52 if (genl_connect(nls->nl_sock)) {
53 err = -ENOLINK;
54 goto err;
55 }
56
57 fd = nl_socket_get_fd(nls->nl_sock);
58 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
59 err = -EINVAL;
60 goto err;
61 }
62
63 if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
64 err = -ENOMEM;
65 goto err;
66 }
67
68 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
69 if (!nls->nl80211) {
70 err = -ENOENT;
71 goto err;
72 }
73
74 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
75 if (!nls->nlctrl) {
76 err = -ENOENT;
77 goto err;
78 }
79 }
80
81 return 0;
82
83
84 err:
85 nl80211_close();
86 return err;
87 }
88
89
90 static int nl80211_msg_error(struct sockaddr_nl *nla,
91 struct nlmsgerr *err, void *arg)
92 {
93 int *ret = arg;
94 *ret = err->error;
95 return NL_STOP;
96 }
97
98 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
99 {
100 int *ret = arg;
101 *ret = 0;
102 return NL_SKIP;
103 }
104
105 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
106 {
107 int *ret = arg;
108 *ret = 0;
109 return NL_STOP;
110 }
111
112 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
113 {
114 return NL_SKIP;
115 }
116
117 static void nl80211_free(struct nl80211_msg_conveyor *cv)
118 {
119 if (cv)
120 {
121 if (cv->cb)
122 nl_cb_put(cv->cb);
123
124 if (cv->msg)
125 nlmsg_free(cv->msg);
126
127 cv->cb = NULL;
128 cv->msg = NULL;
129 }
130 }
131
132 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
133 int cmd, int flags)
134 {
135 static struct nl80211_msg_conveyor cv;
136
137 struct nl_msg *req = NULL;
138 struct nl_cb *cb = NULL;
139
140 req = nlmsg_alloc();
141 if (!req)
142 goto err;
143
144 cb = nl_cb_alloc(NL_CB_DEFAULT);
145 if (!cb)
146 goto err;
147
148 genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
149
150 cv.msg = req;
151 cv.cb = cb;
152
153 return &cv;
154
155 err:
156 nla_put_failure:
157 if (cb)
158 nl_cb_put(cb);
159
160 if (req)
161 nlmsg_free(req);
162
163 return NULL;
164 }
165
166 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
167 {
168 if (nl80211_init() < 0)
169 return NULL;
170
171 return nl80211_new(nls->nlctrl, cmd, flags);
172 }
173
174 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
175 int cmd, int flags)
176 {
177 int ifidx = -1, phyidx = -1;
178 struct nl80211_msg_conveyor *cv;
179
180 if (nl80211_init() < 0)
181 return NULL;
182
183 if (!strncmp(ifname, "phy", 3))
184 phyidx = atoi(&ifname[3]);
185 else if (!strncmp(ifname, "radio", 5))
186 phyidx = atoi(&ifname[5]);
187 else if (!strncmp(ifname, "mon.", 4))
188 ifidx = if_nametoindex(&ifname[4]);
189 else
190 ifidx = if_nametoindex(ifname);
191
192 if ((ifidx < 0) && (phyidx < 0))
193 return NULL;
194
195 cv = nl80211_new(nls->nl80211, cmd, flags);
196 if (!cv)
197 return NULL;
198
199 if (ifidx > -1)
200 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
201
202 if (phyidx > -1)
203 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
204
205 return cv;
206
207 nla_put_failure:
208 nl80211_free(cv);
209 return NULL;
210 }
211
212 static struct nl80211_msg_conveyor * nl80211_send(
213 struct nl80211_msg_conveyor *cv,
214 int (*cb_func)(struct nl_msg *, void *), void *cb_arg
215 ) {
216 static struct nl80211_msg_conveyor rcv;
217 int err = 1;
218
219 if (cb_func)
220 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
221 else
222 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
223
224 if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
225 goto err;
226
227 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
228 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
229 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
230
231 while (err > 0)
232 nl_recvmsgs(nls->nl_sock, cv->cb);
233
234 return &rcv;
235
236 err:
237 nl_cb_put(cv->cb);
238 nlmsg_free(cv->msg);
239
240 return NULL;
241 }
242
243 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
244 {
245 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
246 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
247
248 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
249 genlmsg_attrlen(gnlh, 0), NULL);
250
251 return attr;
252 }
253
254
255 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
256 {
257 struct nl80211_group_conveyor *cv = arg;
258
259 struct nlattr **attr = nl80211_parse(msg);
260 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
261 struct nlattr *mgrp;
262 int mgrpidx;
263
264 if (!attr[CTRL_ATTR_MCAST_GROUPS])
265 return NL_SKIP;
266
267 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
268 {
269 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
270 nla_data(mgrp), nla_len(mgrp), NULL);
271
272 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
273 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
274 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
275 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
276 {
277 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
278 break;
279 }
280 }
281
282 return NL_SKIP;
283 }
284
285 static int nl80211_subscribe(const char *family, const char *group)
286 {
287 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
288 struct nl80211_msg_conveyor *req;
289
290 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
291 if (req)
292 {
293 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
294 nl80211_send(req, nl80211_subscribe_cb, &cv);
295
296 nla_put_failure:
297 nl80211_free(req);
298 }
299
300 return nl_socket_add_membership(nls->nl_sock, cv.id);
301 }
302
303
304 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
305 {
306 struct nl80211_event_conveyor *cv = arg;
307 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
308
309 if (gnlh->cmd == cv->wait)
310 cv->recv = gnlh->cmd;
311
312 return NL_SKIP;
313 }
314
315 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
316 {
317 return NL_OK;
318 }
319
320 static int nl80211_wait(const char *family, const char *group, int cmd)
321 {
322 struct nl80211_event_conveyor cv = { .wait = cmd };
323 struct nl_cb *cb;
324
325 if (nl80211_subscribe(family, group))
326 return -ENOENT;
327
328 cb = nl_cb_alloc(NL_CB_DEFAULT);
329
330 if (!cb)
331 return -ENOMEM;
332
333 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
334 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
335
336 while (!cv.recv)
337 nl_recvmsgs(nls->nl_sock, cb);
338
339 nl_cb_put(cb);
340
341 return 0;
342 }
343
344
345 static int nl80211_freq2channel(int freq)
346 {
347 if (freq == 2484)
348 return 14;
349 else if (freq < 2484)
350 return (freq - 2407) / 5;
351 else if (freq >= 4910 && freq <= 4980)
352 return (freq - 4000) / 5;
353 else
354 return (freq - 5000) / 5;
355 }
356
357 static int nl80211_channel2freq(int channel, const char *band)
358 {
359 if (!band || band[0] != 'a')
360 {
361 if (channel == 14)
362 return 2484;
363 else if (channel < 14)
364 return (channel * 5) + 2407;
365 }
366 else
367 {
368 if (channel >= 182 && channel <= 196)
369 return (channel * 5) + 4000;
370 else
371 return (channel * 5) + 5000;
372 }
373
374 return 0;
375 }
376
377 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
378 {
379 int i, len;
380 char lkey[64] = { 0 };
381 const char *ln = buf;
382 static char lval[256] = { 0 };
383
384 int matched_if = ifname ? 0 : 1;
385
386
387 for( i = 0, len = strlen(buf); i < len; i++ )
388 {
389 if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
390 {
391 ln++;
392 }
393 else if (!lkey[0] && (buf[i] == '='))
394 {
395 if ((&buf[i] - ln) > 0)
396 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
397 }
398 else if (buf[i] == '\n')
399 {
400 if (lkey[0])
401 {
402 memcpy(lval, ln + strlen(lkey) + 1,
403 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
404
405 if ((ifname != NULL) &&
406 (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
407 {
408 matched_if = !strcmp(lval, ifname);
409 }
410 else if (matched_if && !strcmp(lkey, key))
411 {
412 return lval;
413 }
414 }
415
416 ln = &buf[i+1];
417 memset(lkey, 0, sizeof(lkey));
418 memset(lval, 0, sizeof(lval));
419 }
420 }
421
422 return NULL;
423 }
424
425 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
426 {
427 char *buf = arg;
428 struct nlattr **attr = nl80211_parse(msg);
429
430 if (attr[NL80211_ATTR_WIPHY_NAME])
431 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
432 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
433 else
434 buf[0] = 0;
435
436 return NL_SKIP;
437 }
438
439 static char * nl80211_ifname2phy(const char *ifname)
440 {
441 static char phy[32] = { 0 };
442 struct nl80211_msg_conveyor *req;
443
444 memset(phy, 0, sizeof(phy));
445
446 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
447 if (req)
448 {
449 nl80211_send(req, nl80211_ifname2phy_cb, phy);
450 nl80211_free(req);
451 }
452
453 return phy[0] ? phy : NULL;
454 }
455
456 static char * nl80211_hostapd_info(const char *ifname)
457 {
458 int mode;
459 char *phy;
460 char path[32] = { 0 };
461 static char buf[4096] = { 0 };
462 FILE *conf;
463
464 if (nl80211_get_mode(ifname, &mode))
465 return NULL;
466
467 if ((mode == IWINFO_OPMODE_MASTER || mode == IWINFO_OPMODE_AP_VLAN) &&
468 (phy = nl80211_ifname2phy(ifname)) != NULL)
469 {
470 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
471
472 if ((conf = fopen(path, "r")) != NULL)
473 {
474 fread(buf, sizeof(buf) - 1, 1, conf);
475 fclose(conf);
476
477 return buf;
478 }
479 }
480
481 return NULL;
482 }
483
484 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
485 {
486 fd_set rfds;
487 struct timeval tv = { 2, 0 };
488
489 FD_ZERO(&rfds);
490 FD_SET(sock, &rfds);
491
492 memset(buf, 0, blen);
493
494
495 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
496 return -1;
497
498 if (!FD_ISSET(sock, &rfds))
499 return -1;
500
501 return recv(sock, buf, blen, 0);
502 }
503
504 static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
505 const char *event)
506 {
507 int numtry = 0;
508 int sock = -1;
509 char *rv = NULL;
510 size_t remote_length, local_length;
511 static char buffer[10240] = { 0 };
512
513 struct sockaddr_un local = { 0 };
514 struct sockaddr_un remote = { 0 };
515
516
517 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
518 if (sock < 0)
519 return NULL;
520
521 remote.sun_family = AF_UNIX;
522 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
523 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
524
525 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
526 goto out;
527
528 if (connect(sock, (struct sockaddr *) &remote, remote_length))
529 goto out;
530
531 local.sun_family = AF_UNIX;
532 local_length = sizeof(local.sun_family) +
533 sprintf(local.sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
534
535 if (bind(sock, (struct sockaddr *) &local, local_length))
536 goto out;
537
538
539 if (event)
540 {
541 send(sock, "ATTACH", 6, 0);
542
543 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
544 goto out;
545 }
546
547
548 send(sock, cmd, strlen(cmd), 0);
549
550 /* we might have to scan up to 72 channels / 256ms per channel */
551 /* this makes up to 18.5s hence 10 tries */
552 while( numtry++ < 10 )
553 {
554 char *bracket;
555
556 /* make sure there is a terminating nul byte */
557 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
558 {
559 if (event)
560 continue;
561
562 break;
563 }
564
565 if ((!event && buffer[0] != '<') || (event && strstr(buffer, event)))
566 break;
567
568 /* there may be more than max(numtry) BSS-ADDED events */
569 /* ignore them similar to wpa_cli */
570 if (buffer[0] == '<' &&
571 (bracket=strchr(buffer,'>')) != NULL &&
572 strncmp(bracket+1,"CTRL-EVENT-BSS-ADDED",20) == 0)
573 numtry--;
574 }
575
576 rv = buffer;
577
578 out:
579 close(sock);
580
581 if (local.sun_family)
582 unlink(local.sun_path);
583
584 return rv;
585 }
586
587 static inline int nl80211_readint(const char *path)
588 {
589 int fd;
590 int rv = -1;
591 char buffer[16];
592
593 if ((fd = open(path, O_RDONLY)) > -1)
594 {
595 if (read(fd, buffer, sizeof(buffer)) > 0)
596 rv = atoi(buffer);
597
598 close(fd);
599 }
600
601 return rv;
602 }
603
604 static char * nl80211_phy2ifname(const char *ifname)
605 {
606 int fd, ifidx = -1, cifidx = -1, phyidx = -1;
607 char buffer[64];
608 static char nif[IFNAMSIZ] = { 0 };
609
610 DIR *d;
611 struct dirent *e;
612
613 if (!ifname)
614 return NULL;
615 else if (!strncmp(ifname, "phy", 3))
616 phyidx = atoi(&ifname[3]);
617 else if (!strncmp(ifname, "radio", 5))
618 phyidx = atoi(&ifname[5]);
619
620 memset(nif, 0, sizeof(nif));
621
622 if (phyidx > -1)
623 {
624 if ((d = opendir("/sys/class/net")) != NULL)
625 {
626 while ((e = readdir(d)) != NULL)
627 {
628 snprintf(buffer, sizeof(buffer),
629 "/sys/class/net/%s/phy80211/index", e->d_name);
630
631 if (nl80211_readint(buffer) == phyidx)
632 {
633 snprintf(buffer, sizeof(buffer),
634 "/sys/class/net/%s/ifindex", e->d_name);
635
636 if ((cifidx = nl80211_readint(buffer)) >= 0 &&
637 ((ifidx < 0) || (cifidx < ifidx)))
638 {
639 ifidx = cifidx;
640 strncpy(nif, e->d_name, sizeof(nif));
641 }
642 }
643 }
644
645 closedir(d);
646 }
647 }
648
649 return nif[0] ? nif : NULL;
650 }
651
652 static char * nl80211_ifadd(const char *ifname)
653 {
654 int phyidx;
655 char *rv = NULL;
656 static char nif[IFNAMSIZ] = { 0 };
657 struct nl80211_msg_conveyor *req, *res;
658
659 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
660 if (req)
661 {
662 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
663
664 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
665 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
666
667 nl80211_send(req, NULL, NULL);
668
669 rv = nif;
670
671 nla_put_failure:
672 nl80211_free(req);
673 }
674
675 return rv;
676 }
677
678 static void nl80211_ifdel(const char *ifname)
679 {
680 struct nl80211_msg_conveyor *req;
681
682 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
683 if (req)
684 {
685 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
686
687 nl80211_send(req, NULL, NULL);
688
689 nla_put_failure:
690 nl80211_free(req);
691 }
692 }
693
694 static void nl80211_hostapd_hup(const char *ifname)
695 {
696 int fd, pid = 0;
697 char buf[32];
698 char *phy = nl80211_ifname2phy(ifname);
699
700 if (phy)
701 {
702 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
703 if ((fd = open(buf, O_RDONLY)) > 0)
704 {
705 if (read(fd, buf, sizeof(buf)) > 0)
706 pid = atoi(buf);
707
708 close(fd);
709 }
710
711 if (pid > 0)
712 kill(pid, 1);
713 }
714 }
715
716
717 int nl80211_probe(const char *ifname)
718 {
719 return !!nl80211_ifname2phy(ifname);
720 }
721
722 void nl80211_close(void)
723 {
724 if (nls)
725 {
726 if (nls->nlctrl)
727 genl_family_put(nls->nlctrl);
728
729 if (nls->nl80211)
730 genl_family_put(nls->nl80211);
731
732 if (nls->nl_sock)
733 nl_socket_free(nls->nl_sock);
734
735 if (nls->nl_cache)
736 nl_cache_free(nls->nl_cache);
737
738 free(nls);
739 nls = NULL;
740 }
741 }
742
743
744 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
745 {
746 int *mode = arg;
747 struct nlattr **tb = nl80211_parse(msg);
748 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
749 IWINFO_OPMODE_UNKNOWN, /* unspecified */
750 IWINFO_OPMODE_ADHOC, /* IBSS */
751 IWINFO_OPMODE_CLIENT, /* managed */
752 IWINFO_OPMODE_MASTER, /* AP */
753 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
754 IWINFO_OPMODE_WDS, /* WDS */
755 IWINFO_OPMODE_MONITOR, /* monitor */
756 IWINFO_OPMODE_MESHPOINT, /* mesh point */
757 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
758 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
759 };
760
761 if (tb[NL80211_ATTR_IFTYPE])
762 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
763
764 return NL_SKIP;
765 }
766
767 int nl80211_get_mode(const char *ifname, int *buf)
768 {
769 char *res;
770 struct nl80211_msg_conveyor *req;
771
772 res = nl80211_phy2ifname(ifname);
773 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
774 *buf = IWINFO_OPMODE_UNKNOWN;
775
776 if (req)
777 {
778 nl80211_send(req, nl80211_get_mode_cb, buf);
779 nl80211_free(req);
780 }
781
782 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
783 }
784
785
786 struct nl80211_ssid_bssid {
787 unsigned char *ssid;
788 unsigned char bssid[7];
789 };
790
791 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
792 {
793 int ielen;
794 unsigned char *ie;
795 struct nl80211_ssid_bssid *sb = arg;
796 struct nlattr **tb = nl80211_parse(msg);
797 struct nlattr *bss[NL80211_BSS_MAX + 1];
798
799 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
800 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
801 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
802 };
803
804 if (!tb[NL80211_ATTR_BSS] ||
805 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
806 bss_policy) ||
807 !bss[NL80211_BSS_BSSID] ||
808 !bss[NL80211_BSS_STATUS] ||
809 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
810 {
811 return NL_SKIP;
812 }
813
814 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
815 {
816 case NL80211_BSS_STATUS_ASSOCIATED:
817 case NL80211_BSS_STATUS_AUTHENTICATED:
818 case NL80211_BSS_STATUS_IBSS_JOINED:
819
820 if (sb->ssid)
821 {
822 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
823 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
824
825 while (ielen >= 2 && ielen >= ie[1])
826 {
827 if (ie[0] == 0)
828 {
829 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
830 return NL_SKIP;
831 }
832
833 ielen -= ie[1] + 2;
834 ie += ie[1] + 2;
835 }
836 }
837 else
838 {
839 sb->bssid[0] = 1;
840 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
841 return NL_SKIP;
842 }
843
844 default:
845 return NL_SKIP;
846 }
847 }
848
849 int nl80211_get_ssid(const char *ifname, char *buf)
850 {
851 char *res;
852 struct nl80211_msg_conveyor *req;
853 struct nl80211_ssid_bssid sb;
854
855 /* try to find ssid from scan dump results */
856 res = nl80211_phy2ifname(ifname);
857 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
858
859 sb.ssid = buf;
860 *buf = 0;
861
862 if (req)
863 {
864 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
865 nl80211_free(req);
866 }
867
868 /* failed, try to find from hostapd info */
869 if ((*buf == 0) &&
870 (res = nl80211_hostapd_info(ifname)) &&
871 (res = nl80211_getval(ifname, res, "ssid")))
872 {
873 memcpy(buf, res, strlen(res));
874 }
875
876 return (*buf == 0) ? -1 : 0;
877 }
878
879 int nl80211_get_bssid(const char *ifname, char *buf)
880 {
881 char *res;
882 struct nl80211_msg_conveyor *req;
883 struct nl80211_ssid_bssid sb;
884
885 /* try to find bssid from scan dump results */
886 res = nl80211_phy2ifname(ifname);
887 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
888
889 sb.ssid = NULL;
890 sb.bssid[0] = 0;
891
892 if (req)
893 {
894 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
895 nl80211_free(req);
896 }
897
898 /* failed, try to find mac from hostapd info */
899 if ((sb.bssid[0] == 0) &&
900 (res = nl80211_hostapd_info(ifname)) &&
901 (res = nl80211_getval(ifname, res, "bssid")))
902 {
903 sb.bssid[0] = 1;
904 sb.bssid[1] = strtol(&res[0], NULL, 16);
905 sb.bssid[2] = strtol(&res[3], NULL, 16);
906 sb.bssid[3] = strtol(&res[6], NULL, 16);
907 sb.bssid[4] = strtol(&res[9], NULL, 16);
908 sb.bssid[5] = strtol(&res[12], NULL, 16);
909 sb.bssid[6] = strtol(&res[15], NULL, 16);
910 }
911
912 if (sb.bssid[0])
913 {
914 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
915 sb.bssid[1], sb.bssid[2], sb.bssid[3],
916 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
917
918 return 0;
919 }
920
921 return -1;
922 }
923
924
925 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
926 {
927 int *freq = arg;
928 struct nlattr **attr = nl80211_parse(msg);
929 struct nlattr *binfo[NL80211_BSS_MAX + 1];
930
931 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
932 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
933 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
934 };
935
936 if (attr[NL80211_ATTR_BSS] &&
937 !nla_parse_nested(binfo, NL80211_BSS_MAX,
938 attr[NL80211_ATTR_BSS], bss_policy))
939 {
940 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
941 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
942 }
943
944 return NL_SKIP;
945 }
946
947 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
948 {
949 int *freq = arg;
950 struct nlattr **tb = nl80211_parse(msg);
951
952 if (tb[NL80211_ATTR_WIPHY_FREQ])
953 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
954
955 return NL_SKIP;
956 }
957
958 int nl80211_get_frequency(const char *ifname, int *buf)
959 {
960 int chn;
961 char *res, *channel;
962 struct nl80211_msg_conveyor *req;
963
964 /* try to find frequency from interface info */
965 res = nl80211_phy2ifname(ifname);
966 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
967 *buf = 0;
968
969 if (req)
970 {
971 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
972 nl80211_free(req);
973 }
974
975 /* failed, try to find frequency from hostapd info */
976 if ((*buf == 0) &&
977 (res = nl80211_hostapd_info(ifname)) &&
978 (channel = nl80211_getval(NULL, res, "channel")))
979 {
980 chn = atoi(channel);
981 *buf = nl80211_channel2freq(chn, nl80211_getval(NULL, res, "hw_mode"));
982 }
983 else
984 {
985 /* failed, try to find frequency from scan results */
986 if (*buf == 0)
987 {
988 res = nl80211_phy2ifname(ifname);
989 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN,
990 NLM_F_DUMP);
991
992 if (req)
993 {
994 nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
995 nl80211_free(req);
996 }
997 }
998 }
999
1000 return (*buf == 0) ? -1 : 0;
1001 }
1002
1003 int nl80211_get_channel(const char *ifname, int *buf)
1004 {
1005 if (!nl80211_get_frequency(ifname, buf))
1006 {
1007 *buf = nl80211_freq2channel(*buf);
1008 return 0;
1009 }
1010
1011 return -1;
1012 }
1013
1014
1015 int nl80211_get_txpower(const char *ifname, int *buf)
1016 {
1017 #if 0
1018 char *res;
1019 char path[PATH_MAX];
1020
1021 res = nl80211_ifname2phy(ifname);
1022 snprintf(path, sizeof(path), "/sys/kernel/debug/ieee80211/%s/power",
1023 res ? res : ifname);
1024
1025 if ((*buf = nl80211_readint(path)) > -1)
1026 return 0;
1027 #endif
1028
1029 return wext_get_txpower(ifname, buf);
1030 }
1031
1032
1033 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1034 {
1035 int8_t dbm;
1036 int16_t mbit;
1037 struct nl80211_rssi_rate *rr = arg;
1038 struct nlattr **attr = nl80211_parse(msg);
1039 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1040 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1041
1042 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1043 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1044 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1045 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1046 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1047 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1048 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1049 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1050 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1051 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1052 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1053 };
1054
1055 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1056 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1057 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1058 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1059 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1060 };
1061
1062 if (attr[NL80211_ATTR_STA_INFO])
1063 {
1064 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1065 attr[NL80211_ATTR_STA_INFO], stats_policy))
1066 {
1067 if (sinfo[NL80211_STA_INFO_SIGNAL])
1068 {
1069 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1070 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1071 }
1072
1073 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1074 {
1075 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1076 sinfo[NL80211_STA_INFO_TX_BITRATE],
1077 rate_policy))
1078 {
1079 if (rinfo[NL80211_RATE_INFO_BITRATE])
1080 {
1081 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1082 rr->rate = rr->rate
1083 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1084 }
1085 }
1086 }
1087 }
1088 }
1089
1090 return NL_SKIP;
1091 }
1092
1093 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1094 {
1095 DIR *d;
1096 struct dirent *de;
1097 struct nl80211_msg_conveyor *req;
1098
1099 r->rssi = 0;
1100 r->rate = 0;
1101
1102 if ((d = opendir("/sys/class/net")) != NULL)
1103 {
1104 while ((de = readdir(d)) != NULL)
1105 {
1106 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1107 (!de->d_name[strlen(ifname)] ||
1108 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1109 {
1110 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1111 NLM_F_DUMP);
1112
1113 if (req)
1114 {
1115 nl80211_send(req, nl80211_fill_signal_cb, r);
1116 nl80211_free(req);
1117 }
1118 }
1119 }
1120
1121 closedir(d);
1122 }
1123 }
1124
1125 int nl80211_get_bitrate(const char *ifname, int *buf)
1126 {
1127 struct nl80211_rssi_rate rr;
1128
1129 nl80211_fill_signal(ifname, &rr);
1130
1131 if (rr.rate)
1132 {
1133 *buf = (rr.rate * 100);
1134 return 0;
1135 }
1136
1137 return -1;
1138 }
1139
1140 int nl80211_get_signal(const char *ifname, int *buf)
1141 {
1142 struct nl80211_rssi_rate rr;
1143
1144 nl80211_fill_signal(ifname, &rr);
1145
1146 if (rr.rssi)
1147 {
1148 *buf = rr.rssi;
1149 return 0;
1150 }
1151
1152 return -1;
1153 }
1154
1155 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1156 {
1157 int8_t *noise = arg;
1158 struct nlattr **tb = nl80211_parse(msg);
1159 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1160
1161 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1162 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1163 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1164 };
1165
1166 if (!tb[NL80211_ATTR_SURVEY_INFO])
1167 return NL_SKIP;
1168
1169 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1170 tb[NL80211_ATTR_SURVEY_INFO], sp))
1171 return NL_SKIP;
1172
1173 if (!si[NL80211_SURVEY_INFO_NOISE])
1174 return NL_SKIP;
1175
1176 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1177 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1178
1179 return NL_SKIP;
1180 }
1181
1182
1183 int nl80211_get_noise(const char *ifname, int *buf)
1184 {
1185 int8_t noise;
1186 struct nl80211_msg_conveyor *req;
1187
1188 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1189 if (req)
1190 {
1191 noise = 0;
1192
1193 nl80211_send(req, nl80211_get_noise_cb, &noise);
1194 nl80211_free(req);
1195
1196 if (noise)
1197 {
1198 *buf = noise;
1199 return 0;
1200 }
1201 }
1202
1203 return -1;
1204 }
1205
1206 int nl80211_get_quality(const char *ifname, int *buf)
1207 {
1208 int signal;
1209
1210 if (!nl80211_get_signal(ifname, &signal))
1211 {
1212 /* A positive signal level is usually just a quality
1213 * value, pass through as-is */
1214 if (signal >= 0)
1215 {
1216 *buf = signal;
1217 }
1218
1219 /* The cfg80211 wext compat layer assumes a signal range
1220 * of -110 dBm to -40 dBm, the quality value is derived
1221 * by adding 110 to the signal level */
1222 else
1223 {
1224 if (signal < -110)
1225 signal = -110;
1226 else if (signal > -40)
1227 signal = -40;
1228
1229 *buf = (signal + 110);
1230 }
1231
1232 return 0;
1233 }
1234
1235 return -1;
1236 }
1237
1238 int nl80211_get_quality_max(const char *ifname, int *buf)
1239 {
1240 /* The cfg80211 wext compat layer assumes a maximum
1241 * quality of 70 */
1242 *buf = 70;
1243
1244 return 0;
1245 }
1246
1247 int nl80211_get_encryption(const char *ifname, char *buf)
1248 {
1249 int i;
1250 char k[9];
1251 char *val, *res;
1252 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1253
1254 /* WPA supplicant */
1255 if ((res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
1256 (val = nl80211_getval(NULL, res, "pairwise_cipher")))
1257 {
1258 /* WEP */
1259 if (strstr(val, "WEP"))
1260 {
1261 if (strstr(val, "WEP-40"))
1262 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1263
1264 else if (strstr(val, "WEP-104"))
1265 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1266
1267 c->enabled = 1;
1268 c->group_ciphers = c->pair_ciphers;
1269
1270 c->auth_suites |= IWINFO_KMGMT_NONE;
1271 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1272 }
1273
1274 /* WPA */
1275 else
1276 {
1277 if (strstr(val, "TKIP"))
1278 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1279
1280 else if (strstr(val, "CCMP"))
1281 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1282
1283 else if (strstr(val, "NONE"))
1284 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1285
1286 else if (strstr(val, "WEP-40"))
1287 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1288
1289 else if (strstr(val, "WEP-104"))
1290 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1291
1292
1293 if ((val = nl80211_getval(NULL, res, "group_cipher")))
1294 {
1295 if (strstr(val, "TKIP"))
1296 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1297
1298 else if (strstr(val, "CCMP"))
1299 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1300
1301 else if (strstr(val, "NONE"))
1302 c->group_ciphers |= IWINFO_CIPHER_NONE;
1303
1304 else if (strstr(val, "WEP-40"))
1305 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1306
1307 else if (strstr(val, "WEP-104"))
1308 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1309 }
1310
1311
1312 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
1313 {
1314 if (strstr(val, "WPA2"))
1315 c->wpa_version = 2;
1316
1317 else if (strstr(val, "WPA"))
1318 c->wpa_version = 1;
1319
1320
1321 if (strstr(val, "PSK"))
1322 c->auth_suites |= IWINFO_KMGMT_PSK;
1323
1324 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
1325 c->auth_suites |= IWINFO_KMGMT_8021x;
1326
1327 else if (strstr(val, "NONE"))
1328 c->auth_suites |= IWINFO_KMGMT_NONE;
1329 }
1330
1331 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1332 }
1333
1334 return 0;
1335 }
1336
1337 /* Hostapd */
1338 else if ((res = nl80211_hostapd_info(ifname)))
1339 {
1340 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
1341 c->wpa_version = atoi(val);
1342
1343 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
1344
1345 if (!val || strstr(val, "PSK"))
1346 c->auth_suites |= IWINFO_KMGMT_PSK;
1347
1348 if (val && strstr(val, "EAP"))
1349 c->auth_suites |= IWINFO_KMGMT_8021x;
1350
1351 if (val && strstr(val, "NONE"))
1352 c->auth_suites |= IWINFO_KMGMT_NONE;
1353
1354 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
1355 {
1356 if (strstr(val, "TKIP"))
1357 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1358
1359 if (strstr(val, "CCMP"))
1360 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1361
1362 if (strstr(val, "NONE"))
1363 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1364 }
1365
1366 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1367 {
1368 switch(atoi(val)) {
1369 case 1:
1370 c->auth_algs |= IWINFO_AUTH_OPEN;
1371 break;
1372
1373 case 2:
1374 c->auth_algs |= IWINFO_AUTH_SHARED;
1375 break;
1376
1377 case 3:
1378 c->auth_algs |= IWINFO_AUTH_OPEN;
1379 c->auth_algs |= IWINFO_AUTH_SHARED;
1380 break;
1381
1382 default:
1383 break;
1384 }
1385
1386 for (i = 0; i < 4; i++)
1387 {
1388 snprintf(k, sizeof(k), "wep_key%d", i);
1389
1390 if ((val = nl80211_getval(ifname, res, k)))
1391 {
1392 if ((strlen(val) == 5) || (strlen(val) == 10))
1393 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1394
1395 else if ((strlen(val) == 13) || (strlen(val) == 26))
1396 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1397 }
1398 }
1399 }
1400
1401 c->group_ciphers = c->pair_ciphers;
1402 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1403
1404 return 0;
1405 }
1406
1407 return -1;
1408 }
1409
1410
1411 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1412 {
1413 struct nl80211_array_buf *arr = arg;
1414 struct iwinfo_assoclist_entry *e = arr->buf;
1415 struct nlattr **attr = nl80211_parse(msg);
1416 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1417 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1418
1419 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1420 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1421 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1422 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1423 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1424 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1425 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1426 };
1427
1428 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1429 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1430 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1431 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1432 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1433 };
1434
1435 /* advance to end of array */
1436 e += arr->count;
1437 memset(e, 0, sizeof(*e));
1438
1439 if (attr[NL80211_ATTR_MAC])
1440 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1441
1442 if (attr[NL80211_ATTR_STA_INFO] &&
1443 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1444 attr[NL80211_ATTR_STA_INFO], stats_policy))
1445 {
1446 if (sinfo[NL80211_STA_INFO_SIGNAL])
1447 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1448
1449 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1450 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1451
1452 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1453 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1454
1455 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1456 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1457
1458 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1459 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1460 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1461 {
1462 if (rinfo[NL80211_RATE_INFO_BITRATE])
1463 e->rx_rate.rate =
1464 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1465
1466 if (rinfo[NL80211_RATE_INFO_MCS])
1467 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1468
1469 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1470 e->rx_rate.is_40mhz = 1;
1471
1472 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1473 e->rx_rate.is_short_gi = 1;
1474 }
1475
1476 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1477 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1478 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1479 {
1480 if (rinfo[NL80211_RATE_INFO_BITRATE])
1481 e->tx_rate.rate =
1482 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1483
1484 if (rinfo[NL80211_RATE_INFO_MCS])
1485 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1486
1487 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1488 e->tx_rate.is_40mhz = 1;
1489
1490 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1491 e->tx_rate.is_short_gi = 1;
1492 }
1493 }
1494
1495 e->noise = 0; /* filled in by caller */
1496 arr->count++;
1497
1498 return NL_SKIP;
1499 }
1500
1501 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1502 {
1503 DIR *d;
1504 int i, noise = 0;
1505 struct dirent *de;
1506 struct nl80211_msg_conveyor *req;
1507 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1508 struct iwinfo_assoclist_entry *e;
1509
1510 if ((d = opendir("/sys/class/net")) != NULL)
1511 {
1512 while ((de = readdir(d)) != NULL)
1513 {
1514 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1515 (!de->d_name[strlen(ifname)] ||
1516 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1517 {
1518 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1519 NLM_F_DUMP);
1520
1521 if (req)
1522 {
1523 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1524 nl80211_free(req);
1525 }
1526 }
1527 }
1528
1529 closedir(d);
1530
1531 if (!nl80211_get_noise(ifname, &noise))
1532 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1533 e->noise = noise;
1534
1535 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1536 return 0;
1537 }
1538
1539 return -1;
1540 }
1541
1542 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1543 {
1544 int *dbm_max = arg;
1545 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1546
1547 struct nlattr **attr = nl80211_parse(msg);
1548 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1549 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1550 struct nlattr *band, *freq;
1551
1552 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1553 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1554 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1555 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1556 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1557 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1558 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1559 };
1560
1561 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1562 *dbm_max = -1;
1563
1564 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1565 {
1566 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1567 nla_len(band), NULL);
1568
1569 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1570 {
1571 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1572 nla_data(freq), nla_len(freq), freq_policy);
1573
1574 ch_cmp = nl80211_freq2channel(nla_get_u32(
1575 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1576
1577 if ((!ch_cur || (ch_cmp == ch_cur)) &&
1578 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1579 {
1580 *dbm_max = (int)(0.01 * nla_get_u32(
1581 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1582
1583 break;
1584 }
1585 }
1586 }
1587
1588 return NL_SKIP;
1589 }
1590
1591 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1592 {
1593 int ch_cur;
1594 int dbm_max = -1, dbm_cur, dbm_cnt;
1595 struct nl80211_msg_conveyor *req;
1596 struct iwinfo_txpwrlist_entry entry;
1597
1598 if (nl80211_get_channel(ifname, &ch_cur))
1599 ch_cur = 0;
1600
1601 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1602 if (req)
1603 {
1604 /* initialize the value pointer with channel for callback */
1605 dbm_max = ch_cur;
1606
1607 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1608 nl80211_free(req);
1609 }
1610
1611 if (dbm_max > 0)
1612 {
1613 for (dbm_cur = 0, dbm_cnt = 0;
1614 dbm_cur < dbm_max;
1615 dbm_cur++, dbm_cnt++)
1616 {
1617 entry.dbm = dbm_cur;
1618 entry.mw = iwinfo_dbm2mw(dbm_cur);
1619
1620 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1621 }
1622
1623 entry.dbm = dbm_max;
1624 entry.mw = iwinfo_dbm2mw(dbm_max);
1625
1626 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1627 dbm_cnt++;
1628
1629 *len = dbm_cnt * sizeof(entry);
1630 return 0;
1631 }
1632
1633 return -1;
1634 }
1635
1636 static void nl80211_get_scancrypto(const char *spec,
1637 struct iwinfo_crypto_entry *c)
1638 {
1639 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1640 {
1641 c->enabled = 1;
1642
1643 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1644 c->wpa_version = 3;
1645
1646 else if (strstr(spec, "WPA2"))
1647 c->wpa_version = 2;
1648
1649 else if (strstr(spec, "WPA"))
1650 c->wpa_version = 1;
1651
1652 else if (strstr(spec, "WEP"))
1653 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1654
1655
1656 if (strstr(spec, "PSK"))
1657 c->auth_suites |= IWINFO_KMGMT_PSK;
1658
1659 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1660 c->auth_suites |= IWINFO_KMGMT_8021x;
1661
1662 if (strstr(spec, "WPA-NONE"))
1663 c->auth_suites |= IWINFO_KMGMT_NONE;
1664
1665
1666 if (strstr(spec, "TKIP"))
1667 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1668
1669 if (strstr(spec, "CCMP"))
1670 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1671
1672 if (strstr(spec, "WEP-40"))
1673 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1674
1675 if (strstr(spec, "WEP-104"))
1676 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1677
1678 c->group_ciphers = c->pair_ciphers;
1679 }
1680 else
1681 {
1682 c->enabled = 0;
1683 }
1684 }
1685
1686
1687 struct nl80211_scanlist {
1688 struct iwinfo_scanlist_entry *e;
1689 int len;
1690 };
1691
1692
1693 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1694 struct iwinfo_scanlist_entry *e)
1695 {
1696 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1697 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1698 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1699
1700 while (ielen >= 2 && ielen >= ie[1])
1701 {
1702 switch (ie[0])
1703 {
1704 case 0: /* SSID */
1705 memcpy(e->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1706 break;
1707
1708 case 48: /* RSN */
1709 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1710 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1711 break;
1712
1713 case 221: /* Vendor */
1714 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1715 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1716 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1717 break;
1718 }
1719
1720 ielen -= ie[1] + 2;
1721 ie += ie[1] + 2;
1722 }
1723 }
1724
1725 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
1726 {
1727 int8_t rssi;
1728 uint16_t caps;
1729
1730 struct nl80211_scanlist *sl = arg;
1731 struct nlattr **tb = nl80211_parse(msg);
1732 struct nlattr *bss[NL80211_BSS_MAX + 1];
1733
1734 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1735 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1736 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1737 [NL80211_BSS_BSSID] = { },
1738 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1739 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1740 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
1741 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1742 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1743 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1744 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1745 [NL80211_BSS_BEACON_IES] = { },
1746 };
1747
1748 if (!tb[NL80211_ATTR_BSS] ||
1749 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1750 bss_policy) ||
1751 !bss[NL80211_BSS_BSSID])
1752 {
1753 return NL_SKIP;
1754 }
1755
1756 if (bss[NL80211_BSS_CAPABILITY])
1757 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1758 else
1759 caps = 0;
1760
1761 memset(sl->e, 0, sizeof(*sl->e));
1762 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
1763
1764 if (caps & (1<<1))
1765 sl->e->mode = IWINFO_OPMODE_ADHOC;
1766 else if (caps & (1<<0))
1767 sl->e->mode = IWINFO_OPMODE_MASTER;
1768 else
1769 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
1770
1771 if (caps & (1<<4))
1772 sl->e->crypto.enabled = 1;
1773
1774 if (bss[NL80211_BSS_FREQUENCY])
1775 sl->e->channel = nl80211_freq2channel(nla_get_u32(
1776 bss[NL80211_BSS_FREQUENCY]));
1777
1778 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
1779 nl80211_get_scanlist_ie(bss, sl->e);
1780
1781 if (bss[NL80211_BSS_SIGNAL_MBM])
1782 {
1783 sl->e->signal =
1784 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
1785
1786 rssi = sl->e->signal - 0x100;
1787
1788 if (rssi < -110)
1789 rssi = -110;
1790 else if (rssi > -40)
1791 rssi = -40;
1792
1793 sl->e->quality = (rssi + 110);
1794 sl->e->quality_max = 70;
1795 }
1796
1797 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
1798 {
1799 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1800 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
1801 }
1802
1803 sl->e++;
1804 sl->len++;
1805
1806 return NL_SKIP;
1807 }
1808
1809 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
1810 {
1811 struct nl80211_msg_conveyor *req;
1812 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
1813
1814 req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
1815 if (req)
1816 {
1817 nl80211_send(req, NULL, NULL);
1818 nl80211_free(req);
1819 }
1820
1821 nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
1822
1823 req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1824 if (req)
1825 {
1826 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
1827 nl80211_free(req);
1828 }
1829
1830 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
1831 return *len ? 0 : -1;
1832 }
1833
1834 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1835 {
1836 int freq, rssi, qmax, count;
1837 char *res;
1838 char ssid[128] = { 0 };
1839 char bssid[18] = { 0 };
1840 char cipher[256] = { 0 };
1841
1842 /* Got a radioX pseudo interface, find some interface on it or create one */
1843 if (!strncmp(ifname, "radio", 5))
1844 {
1845 /* Reuse existing interface */
1846 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1847 {
1848 return nl80211_get_scanlist(res, buf, len);
1849 }
1850
1851 /* Need to spawn a temporary iface for scanning */
1852 else if ((res = nl80211_ifadd(ifname)) != NULL)
1853 {
1854 count = nl80211_get_scanlist(res, buf, len);
1855 nl80211_ifdel(res);
1856 return count;
1857 }
1858 }
1859
1860 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1861
1862 /* WPA supplicant */
1863 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1864 {
1865 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1866 {
1867 nl80211_get_quality_max(ifname, &qmax);
1868
1869 count = -1;
1870
1871 do {
1872 if (res[0] == '<')
1873 {
1874 /* skip log lines */
1875 goto nextline;
1876 }
1877 if (count < 0)
1878 {
1879 /* skip header line */
1880 count++;
1881 goto nextline;
1882 }
1883 if (sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1884 bssid, &freq, &rssi, cipher, ssid) < 5)
1885 {
1886 /* skip malformed lines */
1887 goto nextline;
1888 }
1889 /* BSSID */
1890 e->mac[0] = strtol(&bssid[0], NULL, 16);
1891 e->mac[1] = strtol(&bssid[3], NULL, 16);
1892 e->mac[2] = strtol(&bssid[6], NULL, 16);
1893 e->mac[3] = strtol(&bssid[9], NULL, 16);
1894 e->mac[4] = strtol(&bssid[12], NULL, 16);
1895 e->mac[5] = strtol(&bssid[15], NULL, 16);
1896
1897 /* SSID */
1898 memcpy(e->ssid, ssid, min(strlen(ssid), sizeof(e->ssid) - 1));
1899
1900 /* Mode (assume master) */
1901 if (strstr(cipher,"[MESH]"))
1902 e->mode = IWINFO_OPMODE_MESHPOINT;
1903 else
1904 e->mode = IWINFO_OPMODE_MASTER;
1905
1906 /* Channel */
1907 e->channel = nl80211_freq2channel(freq);
1908
1909 /* Signal */
1910 e->signal = rssi;
1911
1912 /* Quality */
1913 if (rssi < 0)
1914 {
1915 /* The cfg80211 wext compat layer assumes a signal range
1916 * of -110 dBm to -40 dBm, the quality value is derived
1917 * by adding 110 to the signal level */
1918 if (rssi < -110)
1919 rssi = -110;
1920 else if (rssi > -40)
1921 rssi = -40;
1922
1923 e->quality = (rssi + 110);
1924 }
1925 else
1926 {
1927 e->quality = rssi;
1928 }
1929
1930 /* Max. Quality */
1931 e->quality_max = qmax;
1932
1933 /* Crypto */
1934 nl80211_get_scancrypto(cipher, &e->crypto);
1935
1936 count++;
1937 e++;
1938
1939 memset(ssid, 0, sizeof(ssid));
1940 memset(bssid, 0, sizeof(bssid));
1941 memset(cipher, 0, sizeof(cipher));
1942
1943 nextline:
1944 /* advance to next line */
1945 while( *res && *res++ != '\n' );
1946 }
1947 while( *res );
1948
1949 *len = count * sizeof(struct iwinfo_scanlist_entry);
1950 return 0;
1951 }
1952 }
1953
1954 /* AP scan */
1955 else
1956 {
1957 /* Got a temp interface, don't create yet another one */
1958 if (!strncmp(ifname, "tmp.", 4))
1959 {
1960 if (!iwinfo_ifup(ifname))
1961 return -1;
1962
1963 nl80211_get_scanlist_nl(ifname, buf, len);
1964 iwinfo_ifdown(ifname);
1965 return 0;
1966 }
1967
1968 /* Spawn a new scan interface */
1969 else
1970 {
1971 if (!(res = nl80211_ifadd(ifname)))
1972 goto out;
1973
1974 if (!iwinfo_ifmac(res))
1975 goto out;
1976
1977 /* if we can take the new interface up, the driver supports an
1978 * additional interface and there's no need to tear down the ap */
1979 if (iwinfo_ifup(res))
1980 {
1981 nl80211_get_scanlist_nl(res, buf, len);
1982 iwinfo_ifdown(res);
1983 }
1984
1985 /* driver cannot create secondary interface, take down ap
1986 * during scan */
1987 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1988 {
1989 nl80211_get_scanlist_nl(res, buf, len);
1990 iwinfo_ifdown(res);
1991 iwinfo_ifup(ifname);
1992 nl80211_hostapd_hup(ifname);
1993 }
1994
1995 out:
1996 nl80211_ifdel(res);
1997 return 0;
1998 }
1999 }
2000
2001 return -1;
2002 }
2003
2004 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2005 {
2006 int bands_remain, freqs_remain;
2007
2008 struct nl80211_array_buf *arr = arg;
2009 struct iwinfo_freqlist_entry *e = arr->buf;
2010
2011 struct nlattr **attr = nl80211_parse(msg);
2012 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2013 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2014 struct nlattr *band, *freq;
2015
2016 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2017 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2018 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2019 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2020 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2021 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2022 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2023 };
2024
2025 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2026 {
2027 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2028 nla_data(band), nla_len(band), NULL);
2029
2030 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2031 {
2032 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2033 nla_data(freq), nla_len(freq), NULL);
2034
2035 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2036 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2037 continue;
2038
2039 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2040 e->channel = nl80211_freq2channel(e->mhz);
2041
2042 e->restricted = (
2043 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
2044 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
2045 freqs[NL80211_FREQUENCY_ATTR_RADAR]
2046 ) ? 1 : 0;
2047
2048 e++;
2049 arr->count++;
2050 }
2051 }
2052
2053 return NL_SKIP;
2054 }
2055
2056 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2057 {
2058 struct nl80211_msg_conveyor *req;
2059 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2060
2061 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2062 if (req)
2063 {
2064 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2065 nl80211_free(req);
2066 }
2067
2068 if (arr.count > 0)
2069 {
2070 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2071 return 0;
2072 }
2073
2074 return -1;
2075 }
2076
2077 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2078 {
2079 char *buf = arg;
2080 struct nlattr **attr = nl80211_parse(msg);
2081
2082 if (attr[NL80211_ATTR_REG_ALPHA2])
2083 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2084 else
2085 buf[0] = 0;
2086
2087 return NL_SKIP;
2088 }
2089
2090 int nl80211_get_country(const char *ifname, char *buf)
2091 {
2092 int rv = -1;
2093 struct nl80211_msg_conveyor *req;
2094
2095 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2096 if (req)
2097 {
2098 nl80211_send(req, nl80211_get_country_cb, buf);
2099 nl80211_free(req);
2100
2101 if (buf[0])
2102 rv = 0;
2103 }
2104
2105 return rv;
2106 }
2107
2108 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2109 {
2110 int i, count;
2111 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2112 const struct iwinfo_iso3166_label *l;
2113
2114 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2115 {
2116 e->iso3166 = l->iso3166;
2117 e->ccode[0] = (l->iso3166 / 256);
2118 e->ccode[1] = (l->iso3166 % 256);
2119 }
2120
2121 *len = (count * sizeof(struct iwinfo_country_entry));
2122 return 0;
2123 }
2124
2125 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
2126 {
2127 int *modes = arg;
2128 int bands_remain, freqs_remain;
2129 uint16_t caps = 0;
2130 struct nlattr **attr = nl80211_parse(msg);
2131 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2132 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2133 struct nlattr *band, *freq;
2134
2135 *modes = 0;
2136
2137 if (attr[NL80211_ATTR_WIPHY_BANDS])
2138 {
2139 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2140 {
2141 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2142 nla_data(band), nla_len(band), NULL);
2143
2144 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2145 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2146
2147 /* Treat any nonzero capability as 11n */
2148 if (caps > 0)
2149 *modes |= IWINFO_80211_N;
2150
2151 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2152 freqs_remain)
2153 {
2154 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2155 nla_data(freq), nla_len(freq), NULL);
2156
2157 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2158 continue;
2159
2160 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2161 {
2162 *modes |= IWINFO_80211_B;
2163 *modes |= IWINFO_80211_G;
2164 }
2165 else
2166 {
2167 *modes |= IWINFO_80211_A;
2168 }
2169 }
2170 }
2171 }
2172
2173 return NL_SKIP;
2174 }
2175
2176 int nl80211_get_hwmodelist(const char *ifname, int *buf)
2177 {
2178 struct nl80211_msg_conveyor *req;
2179
2180 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2181 if (req)
2182 {
2183 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
2184 nl80211_free(req);
2185 }
2186
2187 return *buf ? 0 : -1;
2188 }
2189
2190 int nl80211_get_mbssid_support(const char *ifname, int *buf)
2191 {
2192 /* Test whether we can create another interface */
2193 char *nif = nl80211_ifadd(ifname);
2194
2195 if (nif)
2196 {
2197 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
2198
2199 iwinfo_ifdown(nif);
2200 nl80211_ifdel(nif);
2201
2202 return 0;
2203 }
2204
2205 return -1;
2206 }
2207
2208 int nl80211_get_hardware_id(const char *ifname, char *buf)
2209 {
2210 int rv;
2211 char *res;
2212
2213 /* Got a radioX pseudo interface, find some interface on it or create one */
2214 if (!strncmp(ifname, "radio", 5))
2215 {
2216 /* Reuse existing interface */
2217 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2218 {
2219 rv = wext_get_hardware_id(res, buf);
2220 }
2221
2222 /* Need to spawn a temporary iface for finding IDs */
2223 else if ((res = nl80211_ifadd(ifname)) != NULL)
2224 {
2225 rv = wext_get_hardware_id(res, buf);
2226 nl80211_ifdel(res);
2227 }
2228 }
2229 else
2230 {
2231 rv = wext_get_hardware_id(ifname, buf);
2232 }
2233
2234 /* Failed to obtain hardware IDs, search board config */
2235 if (rv)
2236 {
2237 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2238 }
2239
2240 return rv;
2241 }
2242
2243 static const struct iwinfo_hardware_entry *
2244 nl80211_get_hardware_entry(const char *ifname)
2245 {
2246 struct iwinfo_hardware_id id;
2247
2248 if (nl80211_get_hardware_id(ifname, (char *)&id))
2249 return NULL;
2250
2251 return iwinfo_hardware(&id);
2252 }
2253
2254 int nl80211_get_hardware_name(const char *ifname, char *buf)
2255 {
2256 const struct iwinfo_hardware_entry *hw;
2257
2258 if (!(hw = nl80211_get_hardware_entry(ifname)))
2259 sprintf(buf, "Generic MAC80211");
2260 else
2261 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2262
2263 return 0;
2264 }
2265
2266 int nl80211_get_txpower_offset(const char *ifname, int *buf)
2267 {
2268 const struct iwinfo_hardware_entry *hw;
2269
2270 if (!(hw = nl80211_get_hardware_entry(ifname)))
2271 return -1;
2272
2273 *buf = hw->txpower_offset;
2274 return 0;
2275 }
2276
2277 int nl80211_get_frequency_offset(const char *ifname, int *buf)
2278 {
2279 const struct iwinfo_hardware_entry *hw;
2280
2281 if (!(hw = nl80211_get_hardware_entry(ifname)))
2282 return -1;
2283
2284 *buf = hw->frequency_offset;
2285 return 0;
2286 }
Staging tree of Mathias Kresin