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nl80211: fix possible fd leak in nl80211_hostapd_hup()
[project/iwinfo.git] / 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 <limits.h>
26 #include <glob.h>
27 #include <fnmatch.h>
28 #include <stdarg.h>
29
30 #include "iwinfo_nl80211.h"
31
32 #define min(x, y) ((x) < (y)) ? (x) : (y)
33
34 #define BIT(x) (1ULL<<(x))
35
36 static struct nl80211_state *nls = NULL;
37
38 static void nl80211_close(void)
39 {
40 if (nls)
41 {
42 if (nls->nlctrl)
43 genl_family_put(nls->nlctrl);
44
45 if (nls->nl80211)
46 genl_family_put(nls->nl80211);
47
48 if (nls->nl_sock)
49 nl_socket_free(nls->nl_sock);
50
51 if (nls->nl_cache)
52 nl_cache_free(nls->nl_cache);
53
54 free(nls);
55 nls = NULL;
56 }
57 }
58
59 static int nl80211_init(void)
60 {
61 int err, fd;
62
63 if (!nls)
64 {
65 nls = malloc(sizeof(struct nl80211_state));
66 if (!nls) {
67 err = -ENOMEM;
68 goto err;
69 }
70
71 memset(nls, 0, sizeof(*nls));
72
73 nls->nl_sock = nl_socket_alloc();
74 if (!nls->nl_sock) {
75 err = -ENOMEM;
76 goto err;
77 }
78
79 if (genl_connect(nls->nl_sock)) {
80 err = -ENOLINK;
81 goto err;
82 }
83
84 fd = nl_socket_get_fd(nls->nl_sock);
85 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
86 err = -EINVAL;
87 goto err;
88 }
89
90 if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
91 err = -ENOMEM;
92 goto err;
93 }
94
95 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
96 if (!nls->nl80211) {
97 err = -ENOENT;
98 goto err;
99 }
100
101 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
102 if (!nls->nlctrl) {
103 err = -ENOENT;
104 goto err;
105 }
106 }
107
108 return 0;
109
110
111 err:
112 nl80211_close();
113 return err;
114 }
115
116 static int nl80211_readint(const char *path)
117 {
118 int fd;
119 int rv = -1;
120 char buffer[16];
121
122 if ((fd = open(path, O_RDONLY)) > -1)
123 {
124 if (read(fd, buffer, sizeof(buffer)) > 0)
125 rv = atoi(buffer);
126
127 close(fd);
128 }
129
130 return rv;
131 }
132
133 static int nl80211_readstr(const char *path, char *buffer, int length)
134 {
135 int fd;
136 int rv = -1;
137
138 if ((fd = open(path, O_RDONLY)) > -1)
139 {
140 if ((rv = read(fd, buffer, length - 1)) > 0)
141 {
142 if (buffer[rv - 1] == '\n')
143 rv--;
144
145 buffer[rv] = 0;
146 }
147
148 close(fd);
149 }
150
151 return rv;
152 }
153
154
155 static int nl80211_msg_error(struct sockaddr_nl *nla,
156 struct nlmsgerr *err, void *arg)
157 {
158 int *ret = arg;
159 *ret = err->error;
160 return NL_STOP;
161 }
162
163 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
164 {
165 int *ret = arg;
166 *ret = 0;
167 return NL_SKIP;
168 }
169
170 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
171 {
172 int *ret = arg;
173 *ret = 0;
174 return NL_STOP;
175 }
176
177 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
178 {
179 return NL_SKIP;
180 }
181
182 static void nl80211_free(struct nl80211_msg_conveyor *cv)
183 {
184 if (cv)
185 {
186 if (cv->cb)
187 nl_cb_put(cv->cb);
188
189 if (cv->msg)
190 nlmsg_free(cv->msg);
191
192 cv->cb = NULL;
193 cv->msg = NULL;
194 }
195 }
196
197 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
198 int cmd, int flags)
199 {
200 static struct nl80211_msg_conveyor cv;
201
202 struct nl_msg *req = NULL;
203 struct nl_cb *cb = NULL;
204
205 req = nlmsg_alloc();
206 if (!req)
207 goto err;
208
209 cb = nl_cb_alloc(NL_CB_DEFAULT);
210 if (!cb)
211 goto err;
212
213 genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
214
215 cv.msg = req;
216 cv.cb = cb;
217
218 return &cv;
219
220 err:
221 if (cb)
222 nl_cb_put(cb);
223
224 if (req)
225 nlmsg_free(req);
226
227 return NULL;
228 }
229
230 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
231 {
232 if (nl80211_init() < 0)
233 return NULL;
234
235 return nl80211_new(nls->nlctrl, cmd, flags);
236 }
237
238 static int nl80211_phy_idx_from_uci_path(struct uci_section *s)
239 {
240 const char *opt;
241 char buf[128];
242 int idx = -1;
243 glob_t gl;
244
245 opt = uci_lookup_option_string(uci_ctx, s, "path");
246 if (!opt)
247 return -1;
248
249 snprintf(buf, sizeof(buf), "/sys/devices/%s/ieee80211/*/index", opt); /**/
250 if (glob(buf, 0, NULL, &gl))
251 return -1;
252
253 if (gl.gl_pathc > 0)
254 idx = nl80211_readint(gl.gl_pathv[0]);
255
256 globfree(&gl);
257
258 return idx;
259 }
260
261 static int nl80211_phy_idx_from_uci_macaddr(struct uci_section *s)
262 {
263 const char *opt;
264 char buf[128];
265 int i, idx = -1;
266 glob_t gl;
267
268 opt = uci_lookup_option_string(uci_ctx, s, "macaddr");
269 if (!opt)
270 return -1;
271
272 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/*"); /**/
273 if (glob(buf, 0, NULL, &gl))
274 return -1;
275
276 for (i = 0; i < gl.gl_pathc; i++)
277 {
278 snprintf(buf, sizeof(buf), "%s/macaddress", gl.gl_pathv[i]);
279 if (nl80211_readstr(buf, buf, sizeof(buf)) <= 0)
280 continue;
281
282 if (fnmatch(opt, buf, FNM_CASEFOLD))
283 continue;
284
285 snprintf(buf, sizeof(buf), "%s/index", gl.gl_pathv[i]);
286 if ((idx = nl80211_readint(buf)) > -1)
287 break;
288 }
289
290 globfree(&gl);
291
292 return idx;
293 }
294
295 static int nl80211_phy_idx_from_uci_phy(struct uci_section *s)
296 {
297 const char *opt;
298 char buf[128];
299
300 opt = uci_lookup_option_string(uci_ctx, s, "phy");
301 if (!opt)
302 return -1;
303
304 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", opt);
305 return nl80211_readint(buf);
306 }
307
308 static int nl80211_phy_idx_from_uci(const char *name)
309 {
310 struct uci_section *s;
311 int idx = -1;
312
313 s = iwinfo_uci_get_radio(name, "mac80211");
314 if (!s)
315 goto free;
316
317 idx = nl80211_phy_idx_from_uci_path(s);
318
319 if (idx < 0)
320 idx = nl80211_phy_idx_from_uci_macaddr(s);
321
322 if (idx < 0)
323 idx = nl80211_phy_idx_from_uci_phy(s);
324
325 free:
326 iwinfo_uci_free();
327 return idx;
328 }
329
330 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
331 int cmd, int flags)
332 {
333 int ifidx = -1, phyidx = -1;
334 struct nl80211_msg_conveyor *cv;
335
336 if (ifname == NULL)
337 return NULL;
338
339 if (nl80211_init() < 0)
340 return NULL;
341
342 if (!strncmp(ifname, "phy", 3))
343 phyidx = atoi(&ifname[3]);
344 else if (!strncmp(ifname, "radio", 5))
345 phyidx = nl80211_phy_idx_from_uci(ifname);
346 else if (!strncmp(ifname, "mon.", 4))
347 ifidx = if_nametoindex(&ifname[4]);
348 else
349 ifidx = if_nametoindex(ifname);
350
351 /* Valid ifidx must be greater than 0 */
352 if ((ifidx <= 0) && (phyidx < 0))
353 return NULL;
354
355 cv = nl80211_new(nls->nl80211, cmd, flags);
356 if (!cv)
357 return NULL;
358
359 if (ifidx > -1)
360 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
361
362 if (phyidx > -1)
363 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
364
365 return cv;
366
367 nla_put_failure:
368 nl80211_free(cv);
369 return NULL;
370 }
371
372 static struct nl80211_msg_conveyor * nl80211_send(
373 struct nl80211_msg_conveyor *cv,
374 int (*cb_func)(struct nl_msg *, void *), void *cb_arg
375 ) {
376 static struct nl80211_msg_conveyor rcv;
377 int err = 1;
378
379 if (cb_func)
380 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
381 else
382 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
383
384 if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
385 goto err;
386
387 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
388 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
389 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
390
391 while (err > 0)
392 nl_recvmsgs(nls->nl_sock, cv->cb);
393
394 return &rcv;
395
396 err:
397 nl_cb_put(cv->cb);
398 nlmsg_free(cv->msg);
399
400 return NULL;
401 }
402
403 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
404 {
405 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
406 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
407
408 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
409 genlmsg_attrlen(gnlh, 0), NULL);
410
411 return attr;
412 }
413
414
415 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
416 {
417 struct nl80211_group_conveyor *cv = arg;
418
419 struct nlattr **attr = nl80211_parse(msg);
420 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
421 struct nlattr *mgrp;
422 int mgrpidx;
423
424 if (!attr[CTRL_ATTR_MCAST_GROUPS])
425 return NL_SKIP;
426
427 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
428 {
429 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
430 nla_data(mgrp), nla_len(mgrp), NULL);
431
432 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
433 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
434 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
435 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
436 {
437 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
438 break;
439 }
440 }
441
442 return NL_SKIP;
443 }
444
445 static int nl80211_subscribe(const char *family, const char *group)
446 {
447 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
448 struct nl80211_msg_conveyor *req;
449
450 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
451 if (req)
452 {
453 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
454 nl80211_send(req, nl80211_subscribe_cb, &cv);
455
456 nla_put_failure:
457 nl80211_free(req);
458 }
459
460 return nl_socket_add_membership(nls->nl_sock, cv.id);
461 }
462
463
464 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
465 {
466 struct nl80211_event_conveyor *cv = arg;
467 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
468
469 if (gnlh->cmd == cv->wait)
470 cv->recv = gnlh->cmd;
471
472 return NL_SKIP;
473 }
474
475 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
476 {
477 return NL_OK;
478 }
479
480 static int nl80211_wait(const char *family, const char *group, int cmd)
481 {
482 struct nl80211_event_conveyor cv = { .wait = cmd };
483 struct nl_cb *cb;
484
485 if (nl80211_subscribe(family, group))
486 return -ENOENT;
487
488 cb = nl_cb_alloc(NL_CB_DEFAULT);
489
490 if (!cb)
491 return -ENOMEM;
492
493 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
494 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
495
496 while (!cv.recv)
497 nl_recvmsgs(nls->nl_sock, cb);
498
499 nl_cb_put(cb);
500
501 return 0;
502 }
503
504
505 static int nl80211_freq2channel(int freq)
506 {
507 if (freq == 2484)
508 return 14;
509 else if (freq < 2484)
510 return (freq - 2407) / 5;
511 else if (freq >= 4910 && freq <= 4980)
512 return (freq - 4000) / 5;
513 else
514 return (freq - 5000) / 5;
515 }
516
517 static int nl80211_channel2freq(int channel, const char *band)
518 {
519 if (!band || band[0] != 'a')
520 {
521 if (channel == 14)
522 return 2484;
523 else if (channel < 14)
524 return (channel * 5) + 2407;
525 }
526 else
527 {
528 if (channel >= 182 && channel <= 196)
529 return (channel * 5) + 4000;
530 else
531 return (channel * 5) + 5000;
532 }
533
534 return 0;
535 }
536
537 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
538 {
539 char *buf = arg;
540 struct nlattr **attr = nl80211_parse(msg);
541
542 if (attr[NL80211_ATTR_WIPHY_NAME])
543 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
544 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
545 else
546 buf[0] = 0;
547
548 return NL_SKIP;
549 }
550
551 static char * nl80211_ifname2phy(const char *ifname)
552 {
553 static char phy[32] = { 0 };
554 struct nl80211_msg_conveyor *req;
555
556 memset(phy, 0, sizeof(phy));
557
558 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
559 if (req)
560 {
561 nl80211_send(req, nl80211_ifname2phy_cb, phy);
562 nl80211_free(req);
563 }
564
565 return phy[0] ? phy : NULL;
566 }
567
568 static char * nl80211_phy2ifname(const char *ifname)
569 {
570 int ifidx = -1, cifidx = -1, phyidx = -1;
571 char buffer[64];
572 static char nif[IFNAMSIZ] = { 0 };
573
574 DIR *d;
575 struct dirent *e;
576
577 /* Only accept phy name of the form phy%d or radio%d */
578 if (!ifname)
579 return NULL;
580 else if (!strncmp(ifname, "phy", 3))
581 phyidx = atoi(&ifname[3]);
582 else if (!strncmp(ifname, "radio", 5))
583 phyidx = nl80211_phy_idx_from_uci(ifname);
584 else
585 return NULL;
586
587 memset(nif, 0, sizeof(nif));
588
589 if (phyidx > -1)
590 {
591 if ((d = opendir("/sys/class/net")) != NULL)
592 {
593 while ((e = readdir(d)) != NULL)
594 {
595 snprintf(buffer, sizeof(buffer),
596 "/sys/class/net/%s/phy80211/index", e->d_name);
597
598 if (nl80211_readint(buffer) == phyidx)
599 {
600 snprintf(buffer, sizeof(buffer),
601 "/sys/class/net/%s/ifindex", e->d_name);
602
603 if ((cifidx = nl80211_readint(buffer)) >= 0 &&
604 ((ifidx < 0) || (cifidx < ifidx)))
605 {
606 ifidx = cifidx;
607 strncpy(nif, e->d_name, sizeof(nif));
608 }
609 }
610 }
611
612 closedir(d);
613 }
614 }
615
616 return nif[0] ? nif : NULL;
617 }
618
619 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
620 {
621 int *mode = arg;
622 struct nlattr **tb = nl80211_parse(msg);
623 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
624 IWINFO_OPMODE_UNKNOWN, /* unspecified */
625 IWINFO_OPMODE_ADHOC, /* IBSS */
626 IWINFO_OPMODE_CLIENT, /* managed */
627 IWINFO_OPMODE_MASTER, /* AP */
628 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
629 IWINFO_OPMODE_WDS, /* WDS */
630 IWINFO_OPMODE_MONITOR, /* monitor */
631 IWINFO_OPMODE_MESHPOINT, /* mesh point */
632 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
633 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
634 };
635
636 if (tb[NL80211_ATTR_IFTYPE])
637 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
638
639 return NL_SKIP;
640 }
641
642
643 static int nl80211_get_mode(const char *ifname, int *buf)
644 {
645 char *res;
646 struct nl80211_msg_conveyor *req;
647
648 res = nl80211_phy2ifname(ifname);
649 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
650 *buf = IWINFO_OPMODE_UNKNOWN;
651
652 if (req)
653 {
654 nl80211_send(req, nl80211_get_mode_cb, buf);
655 nl80211_free(req);
656 }
657
658 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
659 }
660
661 static int __nl80211_hostapd_query(const char *ifname, ...)
662 {
663 va_list ap, ap_cur;
664 char *phy, *search, *dest, *key, *val, buf[128];
665 int len, mode, found = 0, match = 1;
666 FILE *fp;
667
668 if (nl80211_get_mode(ifname, &mode))
669 return 0;
670
671 if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN)
672 return 0;
673
674 phy = nl80211_ifname2phy(ifname);
675
676 if (!phy)
677 return 0;
678
679 snprintf(buf, sizeof(buf), "/var/run/hostapd-%s.conf", phy);
680 fp = fopen(buf, "r");
681
682 if (!fp)
683 return 0;
684
685 va_start(ap, ifname);
686
687 /* clear all destination buffers */
688 va_copy(ap_cur, ap);
689
690 while ((search = va_arg(ap_cur, char *)) != NULL)
691 {
692 dest = va_arg(ap_cur, char *);
693 len = va_arg(ap_cur, int);
694
695 memset(dest, 0, len);
696 }
697
698 va_end(ap_cur);
699
700 /* iterate applicable lines and copy found values into dest buffers */
701 while (fgets(buf, sizeof(buf), fp))
702 {
703 key = strtok(buf, " =\t\n");
704 val = strtok(NULL, "\n");
705
706 if (!key || !val || !*key || *key == '#')
707 continue;
708
709 if (!strcmp(key, "interface") || !strcmp(key, "bss"))
710 match = !strcmp(ifname, val);
711
712 if (!match)
713 continue;
714
715 va_copy(ap_cur, ap);
716
717 while ((search = va_arg(ap_cur, char *)) != NULL)
718 {
719 dest = va_arg(ap_cur, char *);
720 len = va_arg(ap_cur, int);
721
722 if (!strcmp(search, key))
723 {
724 strncpy(dest, val, len - 1);
725 found++;
726 break;
727 }
728 }
729
730 va_end(ap_cur);
731 }
732
733 fclose(fp);
734
735 va_end(ap);
736
737 return found;
738 }
739
740 #define nl80211_hostapd_query(ifname, ...) \
741 __nl80211_hostapd_query(ifname, ##__VA_ARGS__, NULL)
742
743
744 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
745 {
746 fd_set rfds;
747 struct timeval tv = { 0, 256000 };
748
749 FD_ZERO(&rfds);
750 FD_SET(sock, &rfds);
751
752 memset(buf, 0, blen);
753
754 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
755 return -1;
756
757 if (!FD_ISSET(sock, &rfds))
758 return -1;
759
760 return recv(sock, buf, blen - 1, 0);
761 }
762
763 static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local)
764 {
765 struct sockaddr_un remote = { 0 };
766 size_t remote_length, local_length;
767
768 int sock = socket(PF_UNIX, SOCK_DGRAM, 0);
769 if (sock < 0)
770 return sock;
771
772 remote.sun_family = AF_UNIX;
773 remote_length = sizeof(remote.sun_family) +
774 sprintf(remote.sun_path, "/var/run/wpa_supplicant-%s/%s",
775 ifname, ifname);
776
777 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
778 {
779 close(sock);
780 return -1;
781 }
782
783 if (connect(sock, (struct sockaddr *)&remote, remote_length))
784 {
785 remote_length = sizeof(remote.sun_family) +
786 sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname);
787
788 if (connect(sock, (struct sockaddr *)&remote, remote_length))
789 {
790 close(sock);
791 return -1;
792 }
793 }
794
795 local->sun_family = AF_UNIX;
796 local_length = sizeof(local->sun_family) +
797 sprintf(local->sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
798
799 if (bind(sock, (struct sockaddr *)local, local_length) < 0)
800 {
801 close(sock);
802 return -1;
803 }
804
805 return sock;
806 }
807
808 static int __nl80211_wpactl_query(const char *ifname, ...)
809 {
810 va_list ap, ap_cur;
811 struct sockaddr_un local = { 0 };
812 int len, mode, found = 0, sock = -1;
813 char *search, *dest, *key, *val, *line, *pos, buf[512];
814
815 if (nl80211_get_mode(ifname, &mode))
816 return 0;
817
818 if (mode != IWINFO_OPMODE_CLIENT && mode != IWINFO_OPMODE_ADHOC)
819 return 0;
820
821 sock = nl80211_wpactl_connect(ifname, &local);
822
823 if (sock < 0)
824 return 0;
825
826 va_start(ap, ifname);
827
828 /* clear all destination buffers */
829 va_copy(ap_cur, ap);
830
831 while ((search = va_arg(ap_cur, char *)) != NULL)
832 {
833 dest = va_arg(ap_cur, char *);
834 len = va_arg(ap_cur, int);
835
836 memset(dest, 0, len);
837 }
838
839 va_end(ap_cur);
840
841 send(sock, "STATUS", 6, 0);
842
843 while (true)
844 {
845 if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0)
846 break;
847
848 if (buf[0] == '<')
849 continue;
850
851 for (line = strtok_r(buf, "\n", &pos);
852 line != NULL;
853 line = strtok_r(NULL, "\n", &pos))
854 {
855 key = strtok(line, "=");
856 val = strtok(NULL, "\n");
857
858 if (!key || !val)
859 continue;
860
861 va_copy(ap_cur, ap);
862
863 while ((search = va_arg(ap_cur, char *)) != NULL)
864 {
865 dest = va_arg(ap_cur, char *);
866 len = va_arg(ap_cur, int);
867
868 if (!strcmp(search, key))
869 {
870 strncpy(dest, val, len - 1);
871 found++;
872 break;
873 }
874 }
875
876 va_end(ap_cur);
877 }
878
879 break;
880 }
881
882 va_end(ap);
883
884 close(sock);
885 unlink(local.sun_path);
886
887 return found;
888 }
889
890 #define nl80211_wpactl_query(ifname, ...) \
891 __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL)
892
893
894 static char * nl80211_ifadd(const char *ifname)
895 {
896 char *rv = NULL, path[PATH_MAX];
897 static char nif[IFNAMSIZ] = { 0 };
898 struct nl80211_msg_conveyor *req;
899 FILE *sysfs;
900
901 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
902 if (req)
903 {
904 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
905
906 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
907 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
908
909 nl80211_send(req, NULL, NULL);
910
911 snprintf(path, sizeof(path) - 1,
912 "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif);
913
914 if ((sysfs = fopen(path, "w")) != NULL)
915 {
916 fwrite("0\n", 1, 2, sysfs);
917 fclose(sysfs);
918 }
919
920 rv = nif;
921
922 nla_put_failure:
923 nl80211_free(req);
924 }
925
926 return rv;
927 }
928
929 static void nl80211_ifdel(const char *ifname)
930 {
931 struct nl80211_msg_conveyor *req;
932
933 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
934 if (req)
935 {
936 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
937
938 nl80211_send(req, NULL, NULL);
939
940 nla_put_failure:
941 nl80211_free(req);
942 }
943 }
944
945 static void nl80211_hostapd_hup(const char *ifname)
946 {
947 int fd, pid = 0;
948 char buf[32];
949 char *phy = nl80211_ifname2phy(ifname);
950
951 if (phy)
952 {
953 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
954 if ((fd = open(buf, O_RDONLY)) >= 0)
955 {
956 if (read(fd, buf, sizeof(buf)) > 0)
957 pid = atoi(buf);
958
959 close(fd);
960 }
961
962 if (pid > 0)
963 kill(pid, 1);
964 }
965 }
966
967
968 static int nl80211_probe(const char *ifname)
969 {
970 return !!nl80211_ifname2phy(ifname);
971 }
972
973 struct nl80211_ssid_bssid {
974 unsigned char *ssid;
975 unsigned char bssid[7];
976 };
977
978 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
979 {
980 int ielen;
981 unsigned char *ie;
982 struct nl80211_ssid_bssid *sb = arg;
983 struct nlattr **tb = nl80211_parse(msg);
984 struct nlattr *bss[NL80211_BSS_MAX + 1];
985
986 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
987 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
988 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
989 };
990
991 if (!tb[NL80211_ATTR_BSS] ||
992 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
993 bss_policy) ||
994 !bss[NL80211_BSS_BSSID] ||
995 !bss[NL80211_BSS_STATUS] ||
996 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
997 {
998 return NL_SKIP;
999 }
1000
1001 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
1002 {
1003 case NL80211_BSS_STATUS_ASSOCIATED:
1004 case NL80211_BSS_STATUS_AUTHENTICATED:
1005 case NL80211_BSS_STATUS_IBSS_JOINED:
1006
1007 if (sb->ssid)
1008 {
1009 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1010 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1011
1012 while (ielen >= 2 && ielen >= ie[1])
1013 {
1014 if (ie[0] == 0)
1015 {
1016 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1017 return NL_SKIP;
1018 }
1019
1020 ielen -= ie[1] + 2;
1021 ie += ie[1] + 2;
1022 }
1023 }
1024 else
1025 {
1026 sb->bssid[0] = 1;
1027 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
1028 return NL_SKIP;
1029 }
1030
1031 default:
1032 return NL_SKIP;
1033 }
1034 }
1035
1036 static int nl80211_get_ssid(const char *ifname, char *buf)
1037 {
1038 char *res;
1039 struct nl80211_msg_conveyor *req;
1040 struct nl80211_ssid_bssid sb;
1041
1042 /* try to find ssid from scan dump results */
1043 res = nl80211_phy2ifname(ifname);
1044 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1045
1046 sb.ssid = (unsigned char *)buf;
1047 *buf = 0;
1048
1049 if (req)
1050 {
1051 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
1052 nl80211_free(req);
1053 }
1054
1055 /* failed, try to find from hostapd info */
1056 if (*buf == 0)
1057 nl80211_hostapd_query(ifname, "ssid", buf, IWINFO_ESSID_MAX_SIZE + 1);
1058
1059 return (*buf == 0) ? -1 : 0;
1060 }
1061
1062 static int nl80211_get_bssid(const char *ifname, char *buf)
1063 {
1064 char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")];
1065 struct nl80211_msg_conveyor *req;
1066 struct nl80211_ssid_bssid sb;
1067
1068 /* try to find bssid from scan dump results */
1069 res = nl80211_phy2ifname(ifname);
1070 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1071
1072 sb.ssid = NULL;
1073 sb.bssid[0] = 0;
1074
1075 if (req)
1076 {
1077 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
1078 nl80211_free(req);
1079 }
1080
1081 /* failed, try to find mac from hostapd info */
1082 if ((sb.bssid[0] == 0) &&
1083 nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid)))
1084 {
1085 sb.bssid[0] = 1;
1086 sb.bssid[1] = strtol(&bssid[0], NULL, 16);
1087 sb.bssid[2] = strtol(&bssid[3], NULL, 16);
1088 sb.bssid[3] = strtol(&bssid[6], NULL, 16);
1089 sb.bssid[4] = strtol(&bssid[9], NULL, 16);
1090 sb.bssid[5] = strtol(&bssid[12], NULL, 16);
1091 sb.bssid[6] = strtol(&bssid[15], NULL, 16);
1092 }
1093
1094 if (sb.bssid[0])
1095 {
1096 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
1097 sb.bssid[1], sb.bssid[2], sb.bssid[3],
1098 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
1099
1100 return 0;
1101 }
1102
1103 return -1;
1104 }
1105
1106
1107 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
1108 {
1109 int *freq = arg;
1110 struct nlattr **attr = nl80211_parse(msg);
1111 struct nlattr *binfo[NL80211_BSS_MAX + 1];
1112
1113 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1114 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1115 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1116 };
1117
1118 if (attr[NL80211_ATTR_BSS] &&
1119 !nla_parse_nested(binfo, NL80211_BSS_MAX,
1120 attr[NL80211_ATTR_BSS], bss_policy))
1121 {
1122 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
1123 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
1124 }
1125
1126 return NL_SKIP;
1127 }
1128
1129 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
1130 {
1131 int *freq = arg;
1132 struct nlattr **tb = nl80211_parse(msg);
1133
1134 if (tb[NL80211_ATTR_WIPHY_FREQ])
1135 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
1136
1137 return NL_SKIP;
1138 }
1139
1140 static int nl80211_get_frequency(const char *ifname, int *buf)
1141 {
1142 char *res, channel[4], hwmode[2];
1143 struct nl80211_msg_conveyor *req;
1144
1145 /* try to find frequency from interface info */
1146 res = nl80211_phy2ifname(ifname);
1147 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
1148 *buf = 0;
1149
1150 if (req)
1151 {
1152 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
1153 nl80211_free(req);
1154 }
1155
1156 /* failed, try to find frequency from hostapd info */
1157 if ((*buf == 0) &&
1158 nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode),
1159 "channel", channel, sizeof(channel)) == 2)
1160 {
1161 *buf = nl80211_channel2freq(atoi(channel), hwmode);
1162 }
1163
1164 /* failed, try to find frequency from scan results */
1165 if (*buf == 0)
1166 {
1167 res = nl80211_phy2ifname(ifname);
1168 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1169
1170 if (req)
1171 {
1172 nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
1173 nl80211_free(req);
1174 }
1175 }
1176
1177 return (*buf == 0) ? -1 : 0;
1178 }
1179
1180 static int nl80211_get_channel(const char *ifname, int *buf)
1181 {
1182 if (!nl80211_get_frequency(ifname, buf))
1183 {
1184 *buf = nl80211_freq2channel(*buf);
1185 return 0;
1186 }
1187
1188 return -1;
1189 }
1190
1191 static int nl80211_get_txpower_cb(struct nl_msg *msg, void *arg)
1192 {
1193 int *buf = arg;
1194 struct nlattr **tb = nl80211_parse(msg);
1195
1196 if (tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL])
1197 *buf = iwinfo_mbm2dbm(nla_get_u32(tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL]));
1198
1199 return NL_SKIP;
1200 }
1201
1202 static int nl80211_get_txpower(const char *ifname, int *buf)
1203 {
1204 char *res;
1205 struct nl80211_msg_conveyor *req;
1206
1207 res = nl80211_phy2ifname(ifname);
1208 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
1209
1210 if (req)
1211 {
1212 *buf = 0;
1213 nl80211_send(req, nl80211_get_txpower_cb, buf);
1214 nl80211_free(req);
1215 if (*buf)
1216 return 0;
1217 }
1218
1219 return -1;
1220 }
1221
1222
1223 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1224 {
1225 int8_t dbm;
1226 int16_t mbit;
1227 struct nl80211_rssi_rate *rr = arg;
1228 struct nlattr **attr = nl80211_parse(msg);
1229 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1230 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1231
1232 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1233 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1234 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1235 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1236 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1237 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1238 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1239 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1240 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1241 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1242 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1243 };
1244
1245 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1246 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1247 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1248 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1249 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1250 };
1251
1252 if (attr[NL80211_ATTR_STA_INFO])
1253 {
1254 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1255 attr[NL80211_ATTR_STA_INFO], stats_policy))
1256 {
1257 if (sinfo[NL80211_STA_INFO_SIGNAL])
1258 {
1259 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1260 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1261 }
1262
1263 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1264 {
1265 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1266 sinfo[NL80211_STA_INFO_TX_BITRATE],
1267 rate_policy))
1268 {
1269 if (rinfo[NL80211_RATE_INFO_BITRATE])
1270 {
1271 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1272 rr->rate = rr->rate
1273 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1274 }
1275 }
1276 }
1277 }
1278 }
1279
1280 return NL_SKIP;
1281 }
1282
1283 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1284 {
1285 DIR *d;
1286 struct dirent *de;
1287 struct nl80211_msg_conveyor *req;
1288
1289 r->rssi = 0;
1290 r->rate = 0;
1291
1292 if ((d = opendir("/sys/class/net")) != NULL)
1293 {
1294 while ((de = readdir(d)) != NULL)
1295 {
1296 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1297 (!de->d_name[strlen(ifname)] ||
1298 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1299 {
1300 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1301 NLM_F_DUMP);
1302
1303 if (req)
1304 {
1305 nl80211_send(req, nl80211_fill_signal_cb, r);
1306 nl80211_free(req);
1307 }
1308 }
1309 }
1310
1311 closedir(d);
1312 }
1313 }
1314
1315 static int nl80211_get_bitrate(const char *ifname, int *buf)
1316 {
1317 struct nl80211_rssi_rate rr;
1318
1319 nl80211_fill_signal(ifname, &rr);
1320
1321 if (rr.rate)
1322 {
1323 *buf = (rr.rate * 100);
1324 return 0;
1325 }
1326
1327 return -1;
1328 }
1329
1330 static int nl80211_get_signal(const char *ifname, int *buf)
1331 {
1332 struct nl80211_rssi_rate rr;
1333
1334 nl80211_fill_signal(ifname, &rr);
1335
1336 if (rr.rssi)
1337 {
1338 *buf = rr.rssi;
1339 return 0;
1340 }
1341
1342 return -1;
1343 }
1344
1345 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1346 {
1347 int8_t *noise = arg;
1348 struct nlattr **tb = nl80211_parse(msg);
1349 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1350
1351 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1352 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1353 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1354 };
1355
1356 if (!tb[NL80211_ATTR_SURVEY_INFO])
1357 return NL_SKIP;
1358
1359 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1360 tb[NL80211_ATTR_SURVEY_INFO], sp))
1361 return NL_SKIP;
1362
1363 if (!si[NL80211_SURVEY_INFO_NOISE])
1364 return NL_SKIP;
1365
1366 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1367 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1368
1369 return NL_SKIP;
1370 }
1371
1372
1373 static int nl80211_get_noise(const char *ifname, int *buf)
1374 {
1375 int8_t noise;
1376 struct nl80211_msg_conveyor *req;
1377
1378 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1379 if (req)
1380 {
1381 noise = 0;
1382
1383 nl80211_send(req, nl80211_get_noise_cb, &noise);
1384 nl80211_free(req);
1385
1386 if (noise)
1387 {
1388 *buf = noise;
1389 return 0;
1390 }
1391 }
1392
1393 return -1;
1394 }
1395
1396 static int nl80211_get_quality(const char *ifname, int *buf)
1397 {
1398 int signal;
1399
1400 if (!nl80211_get_signal(ifname, &signal))
1401 {
1402 /* A positive signal level is usually just a quality
1403 * value, pass through as-is */
1404 if (signal >= 0)
1405 {
1406 *buf = signal;
1407 }
1408
1409 /* The cfg80211 wext compat layer assumes a signal range
1410 * of -110 dBm to -40 dBm, the quality value is derived
1411 * by adding 110 to the signal level */
1412 else
1413 {
1414 if (signal < -110)
1415 signal = -110;
1416 else if (signal > -40)
1417 signal = -40;
1418
1419 *buf = (signal + 110);
1420 }
1421
1422 return 0;
1423 }
1424
1425 return -1;
1426 }
1427
1428 static int nl80211_get_quality_max(const char *ifname, int *buf)
1429 {
1430 /* The cfg80211 wext compat layer assumes a maximum
1431 * quality of 70 */
1432 *buf = 70;
1433
1434 return 0;
1435 }
1436
1437 static int nl80211_check_wepkey(const char *key)
1438 {
1439 if (key && *key)
1440 {
1441 switch (strlen(key))
1442 {
1443 case 5:
1444 case 10:
1445 return IWINFO_CIPHER_WEP40;
1446
1447 case 13:
1448 case 26:
1449 return IWINFO_CIPHER_WEP104;
1450 }
1451 }
1452
1453 return 0;
1454 }
1455
1456 static int nl80211_get_encryption(const char *ifname, char *buf)
1457 {
1458 char wpa[2], wpa_key_mgmt[16], wpa_pairwise[16], wpa_groupwise[16];
1459 char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27];
1460
1461 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1462
1463 /* WPA supplicant */
1464 if (nl80211_wpactl_query(ifname,
1465 "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise),
1466 "group_cipher", wpa_groupwise, sizeof(wpa_groupwise),
1467 "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt)))
1468 {
1469 /* WEP */
1470 if (!strcmp(wpa_key_mgmt, "NONE"))
1471 {
1472 if (strstr(wpa_pairwise, "WEP-40"))
1473 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1474 else if (strstr(wpa_pairwise, "WEP-104"))
1475 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1476
1477 if (strstr(wpa_groupwise, "WEP-40"))
1478 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1479 else if (strstr(wpa_groupwise, "WEP-104"))
1480 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1481
1482 c->enabled = !!(c->pair_ciphers | c->group_ciphers);
1483 c->auth_suites |= IWINFO_KMGMT_NONE;
1484 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1485 }
1486
1487 /* WPA */
1488 else if (strstr(wpa_key_mgmt, "WPA"))
1489 {
1490 if (strstr(wpa_pairwise, "TKIP"))
1491 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1492 else if (strstr(wpa_pairwise, "CCMP"))
1493 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1494 else if (strstr(wpa_pairwise, "NONE"))
1495 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1496 else if (strstr(wpa_pairwise, "WEP-40"))
1497 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1498 else if (strstr(wpa_pairwise, "WEP-104"))
1499 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1500
1501 if (strstr(wpa_groupwise, "TKIP"))
1502 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1503 else if (strstr(wpa_groupwise, "CCMP"))
1504 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1505 else if (strstr(wpa_groupwise, "NONE"))
1506 c->group_ciphers |= IWINFO_CIPHER_NONE;
1507 else if (strstr(wpa_groupwise, "WEP-40"))
1508 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1509 else if (strstr(wpa_groupwise, "WEP-104"))
1510 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1511
1512 if (strstr(wpa_key_mgmt, "WPA2"))
1513 c->wpa_version = 2;
1514 else if (strstr(wpa_key_mgmt, "WPA"))
1515 c->wpa_version = 1;
1516
1517 if (strstr(wpa_key_mgmt, "PSK"))
1518 c->auth_suites |= IWINFO_KMGMT_PSK;
1519 else if (strstr(wpa_key_mgmt, "EAP") ||
1520 strstr(wpa_key_mgmt, "802.1X"))
1521 c->auth_suites |= IWINFO_KMGMT_8021x;
1522 else if (strstr(wpa_key_mgmt, "NONE"))
1523 c->auth_suites |= IWINFO_KMGMT_NONE;
1524
1525 c->enabled = !!(c->wpa_version && c->auth_suites);
1526 }
1527
1528 return 0;
1529 }
1530
1531 /* Hostapd */
1532 else if (nl80211_hostapd_query(ifname,
1533 "wpa", wpa, sizeof(wpa),
1534 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1535 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise),
1536 "auth_algs", auth_algs, sizeof(auth_algs),
1537 "wep_key0", wep_key0, sizeof(wep_key0),
1538 "wep_key1", wep_key1, sizeof(wep_key1),
1539 "wep_key2", wep_key2, sizeof(wep_key2),
1540 "wep_key3", wep_key3, sizeof(wep_key3)))
1541 {
1542 c->wpa_version = wpa[0] ? atoi(wpa) : 0;
1543
1544 if (wpa_key_mgmt[0])
1545 {
1546 if (strstr(wpa_key_mgmt, "PSK"))
1547 c->auth_suites |= IWINFO_KMGMT_PSK;
1548
1549 if (strstr(wpa_key_mgmt, "EAP"))
1550 c->auth_suites |= IWINFO_KMGMT_8021x;
1551
1552 if (strstr(wpa_key_mgmt, "NONE"))
1553 c->auth_suites |= IWINFO_KMGMT_NONE;
1554 }
1555 else
1556 {
1557 c->auth_suites |= IWINFO_KMGMT_PSK;
1558 }
1559
1560 if (wpa_pairwise[0])
1561 {
1562 if (strstr(wpa_pairwise, "TKIP"))
1563 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1564
1565 if (strstr(wpa_pairwise, "CCMP"))
1566 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1567
1568 if (strstr(wpa_pairwise, "NONE"))
1569 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1570 }
1571
1572 if (auth_algs[0])
1573 {
1574 switch(atoi(auth_algs))
1575 {
1576 case 1:
1577 c->auth_algs |= IWINFO_AUTH_OPEN;
1578 break;
1579
1580 case 2:
1581 c->auth_algs |= IWINFO_AUTH_SHARED;
1582 break;
1583
1584 case 3:
1585 c->auth_algs |= IWINFO_AUTH_OPEN;
1586 c->auth_algs |= IWINFO_AUTH_SHARED;
1587 break;
1588 }
1589
1590 c->pair_ciphers |= nl80211_check_wepkey(wep_key0);
1591 c->pair_ciphers |= nl80211_check_wepkey(wep_key1);
1592 c->pair_ciphers |= nl80211_check_wepkey(wep_key2);
1593 c->pair_ciphers |= nl80211_check_wepkey(wep_key3);
1594 }
1595
1596 c->group_ciphers = c->pair_ciphers;
1597 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1598
1599 return 0;
1600 }
1601
1602 return -1;
1603 }
1604
1605 static int nl80211_get_phyname(const char *ifname, char *buf)
1606 {
1607 const char *name;
1608
1609 name = nl80211_ifname2phy(ifname);
1610
1611 if (name)
1612 {
1613 strcpy(buf, name);
1614 return 0;
1615 }
1616 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1617 {
1618 name = nl80211_ifname2phy(name);
1619
1620 if (name)
1621 {
1622 strcpy(buf, ifname);
1623 return 0;
1624 }
1625 }
1626
1627 return -1;
1628 }
1629
1630
1631 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1632 {
1633 struct nl80211_array_buf *arr = arg;
1634 struct iwinfo_assoclist_entry *e = arr->buf;
1635 struct nlattr **attr = nl80211_parse(msg);
1636 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1637 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1638 struct nl80211_sta_flag_update *sta_flags;
1639
1640 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1641 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1642 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1643 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1644 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1645 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1646 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1647 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1648 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1649 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 },
1650 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
1651 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 },
1652 [NL80211_STA_INFO_STA_FLAGS] =
1653 { .minlen = sizeof(struct nl80211_sta_flag_update) },
1654 };
1655
1656 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1657 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1658 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1659 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1660 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1661 };
1662
1663 /* advance to end of array */
1664 e += arr->count;
1665 memset(e, 0, sizeof(*e));
1666
1667 if (attr[NL80211_ATTR_MAC])
1668 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1669
1670 if (attr[NL80211_ATTR_STA_INFO] &&
1671 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1672 attr[NL80211_ATTR_STA_INFO], stats_policy))
1673 {
1674 if (sinfo[NL80211_STA_INFO_SIGNAL])
1675 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1676
1677 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1678 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1679
1680 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1681 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1682
1683 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1684 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1685
1686 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1687 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1688 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1689 {
1690 if (rinfo[NL80211_RATE_INFO_BITRATE])
1691 e->rx_rate.rate =
1692 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1693
1694 if (rinfo[NL80211_RATE_INFO_MCS])
1695 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1696
1697 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1698 e->rx_rate.is_40mhz = 1;
1699
1700 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1701 e->rx_rate.is_short_gi = 1;
1702 }
1703
1704 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1705 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1706 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1707 {
1708 if (rinfo[NL80211_RATE_INFO_BITRATE])
1709 e->tx_rate.rate =
1710 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1711
1712 if (rinfo[NL80211_RATE_INFO_MCS])
1713 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1714
1715 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1716 e->tx_rate.is_40mhz = 1;
1717
1718 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1719 e->tx_rate.is_short_gi = 1;
1720 }
1721
1722 if (sinfo[NL80211_STA_INFO_RX_BYTES])
1723 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
1724
1725 if (sinfo[NL80211_STA_INFO_TX_BYTES])
1726 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
1727
1728 if (sinfo[NL80211_STA_INFO_TX_RETRIES])
1729 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
1730
1731 if (sinfo[NL80211_STA_INFO_TX_FAILED])
1732 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
1733
1734 if (sinfo[NL80211_STA_INFO_T_OFFSET])
1735 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]);
1736
1737 /* Station flags */
1738 if (sinfo[NL80211_STA_INFO_STA_FLAGS])
1739 {
1740 sta_flags = (struct nl80211_sta_flag_update *)
1741 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
1742
1743 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
1744 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
1745 e->is_authorized = 1;
1746
1747 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
1748 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1749 e->is_authenticated = 1;
1750
1751 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
1752 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1753 e->is_preamble_short = 1;
1754
1755 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
1756 sta_flags->set & BIT(NL80211_STA_FLAG_WME))
1757 e->is_wme = 1;
1758
1759 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
1760 sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
1761 e->is_mfp = 1;
1762
1763 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
1764 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1765 e->is_tdls = 1;
1766 }
1767 }
1768
1769 e->noise = 0; /* filled in by caller */
1770 arr->count++;
1771
1772 return NL_SKIP;
1773 }
1774
1775 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1776 {
1777 DIR *d;
1778 int i, noise = 0;
1779 struct dirent *de;
1780 struct nl80211_msg_conveyor *req;
1781 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1782 struct iwinfo_assoclist_entry *e;
1783
1784 if ((d = opendir("/sys/class/net")) != NULL)
1785 {
1786 while ((de = readdir(d)) != NULL)
1787 {
1788 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1789 (!de->d_name[strlen(ifname)] ||
1790 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1791 {
1792 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1793 NLM_F_DUMP);
1794
1795 if (req)
1796 {
1797 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1798 nl80211_free(req);
1799 }
1800 }
1801 }
1802
1803 closedir(d);
1804
1805 if (!nl80211_get_noise(ifname, &noise))
1806 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1807 e->noise = noise;
1808
1809 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1810 return 0;
1811 }
1812
1813 return -1;
1814 }
1815
1816 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1817 {
1818 int *dbm_max = arg;
1819 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1820
1821 struct nlattr **attr = nl80211_parse(msg);
1822 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1823 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1824 struct nlattr *band, *freq;
1825
1826 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1827 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1828 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1829 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1830 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1831 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1832 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1833 };
1834
1835 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1836 *dbm_max = -1;
1837
1838 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1839 {
1840 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1841 nla_len(band), NULL);
1842
1843 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1844 {
1845 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1846 nla_data(freq), nla_len(freq), freq_policy);
1847
1848 ch_cmp = nl80211_freq2channel(nla_get_u32(
1849 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1850
1851 if ((!ch_cur || (ch_cmp == ch_cur)) &&
1852 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1853 {
1854 *dbm_max = (int)(0.01 * nla_get_u32(
1855 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1856
1857 break;
1858 }
1859 }
1860 }
1861
1862 return NL_SKIP;
1863 }
1864
1865 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1866 {
1867 int ch_cur;
1868 int dbm_max = -1, dbm_cur, dbm_cnt;
1869 struct nl80211_msg_conveyor *req;
1870 struct iwinfo_txpwrlist_entry entry;
1871
1872 if (nl80211_get_channel(ifname, &ch_cur))
1873 ch_cur = 0;
1874
1875 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1876 if (req)
1877 {
1878 /* initialize the value pointer with channel for callback */
1879 dbm_max = ch_cur;
1880
1881 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1882 nl80211_free(req);
1883 }
1884
1885 if (dbm_max > 0)
1886 {
1887 for (dbm_cur = 0, dbm_cnt = 0;
1888 dbm_cur < dbm_max;
1889 dbm_cur++, dbm_cnt++)
1890 {
1891 entry.dbm = dbm_cur;
1892 entry.mw = iwinfo_dbm2mw(dbm_cur);
1893
1894 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1895 }
1896
1897 entry.dbm = dbm_max;
1898 entry.mw = iwinfo_dbm2mw(dbm_max);
1899
1900 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1901 dbm_cnt++;
1902
1903 *len = dbm_cnt * sizeof(entry);
1904 return 0;
1905 }
1906
1907 return -1;
1908 }
1909
1910 static void nl80211_get_scancrypto(const char *spec,
1911 struct iwinfo_crypto_entry *c)
1912 {
1913 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1914 {
1915 c->enabled = 1;
1916
1917 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1918 c->wpa_version = 3;
1919
1920 else if (strstr(spec, "WPA2"))
1921 c->wpa_version = 2;
1922
1923 else if (strstr(spec, "WPA"))
1924 c->wpa_version = 1;
1925
1926 else if (strstr(spec, "WEP"))
1927 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1928
1929
1930 if (strstr(spec, "PSK"))
1931 c->auth_suites |= IWINFO_KMGMT_PSK;
1932
1933 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1934 c->auth_suites |= IWINFO_KMGMT_8021x;
1935
1936 if (strstr(spec, "WPA-NONE"))
1937 c->auth_suites |= IWINFO_KMGMT_NONE;
1938
1939
1940 if (strstr(spec, "TKIP"))
1941 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1942
1943 if (strstr(spec, "CCMP"))
1944 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1945
1946 if (strstr(spec, "WEP-40"))
1947 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1948
1949 if (strstr(spec, "WEP-104"))
1950 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1951
1952 c->group_ciphers = c->pair_ciphers;
1953 }
1954 else
1955 {
1956 c->enabled = 0;
1957 }
1958 }
1959
1960
1961 struct nl80211_scanlist {
1962 struct iwinfo_scanlist_entry *e;
1963 int len;
1964 };
1965
1966
1967 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1968 struct iwinfo_scanlist_entry *e)
1969 {
1970 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1971 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1972 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1973 int len;
1974
1975 while (ielen >= 2 && ielen >= ie[1])
1976 {
1977 switch (ie[0])
1978 {
1979 case 0: /* SSID */
1980 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
1981 memcpy(e->ssid, ie + 2, len);
1982 e->ssid[len] = 0;
1983 break;
1984
1985 case 48: /* RSN */
1986 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1987 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1988 break;
1989
1990 case 221: /* Vendor */
1991 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1992 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1993 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1994 break;
1995 }
1996
1997 ielen -= ie[1] + 2;
1998 ie += ie[1] + 2;
1999 }
2000 }
2001
2002 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
2003 {
2004 int8_t rssi;
2005 uint16_t caps;
2006
2007 struct nl80211_scanlist *sl = arg;
2008 struct nlattr **tb = nl80211_parse(msg);
2009 struct nlattr *bss[NL80211_BSS_MAX + 1];
2010
2011 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2012 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2013 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2014 [NL80211_BSS_BSSID] = { 0 },
2015 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2016 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2017 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
2018 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2019 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2020 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2021 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2022 [NL80211_BSS_BEACON_IES] = { 0 },
2023 };
2024
2025 if (!tb[NL80211_ATTR_BSS] ||
2026 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2027 bss_policy) ||
2028 !bss[NL80211_BSS_BSSID])
2029 {
2030 return NL_SKIP;
2031 }
2032
2033 if (bss[NL80211_BSS_CAPABILITY])
2034 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2035 else
2036 caps = 0;
2037
2038 memset(sl->e, 0, sizeof(*sl->e));
2039 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
2040
2041 if (caps & (1<<1))
2042 sl->e->mode = IWINFO_OPMODE_ADHOC;
2043 else if (caps & (1<<0))
2044 sl->e->mode = IWINFO_OPMODE_MASTER;
2045 else
2046 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
2047
2048 if (caps & (1<<4))
2049 sl->e->crypto.enabled = 1;
2050
2051 if (bss[NL80211_BSS_FREQUENCY])
2052 sl->e->channel = nl80211_freq2channel(nla_get_u32(
2053 bss[NL80211_BSS_FREQUENCY]));
2054
2055 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
2056 nl80211_get_scanlist_ie(bss, sl->e);
2057
2058 if (bss[NL80211_BSS_SIGNAL_MBM])
2059 {
2060 sl->e->signal =
2061 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
2062
2063 rssi = sl->e->signal - 0x100;
2064
2065 if (rssi < -110)
2066 rssi = -110;
2067 else if (rssi > -40)
2068 rssi = -40;
2069
2070 sl->e->quality = (rssi + 110);
2071 sl->e->quality_max = 70;
2072 }
2073
2074 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
2075 {
2076 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2077 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2078 }
2079
2080 sl->e++;
2081 sl->len++;
2082
2083 return NL_SKIP;
2084 }
2085
2086 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
2087 {
2088 struct nl80211_msg_conveyor *req;
2089 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
2090
2091 req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
2092 if (req)
2093 {
2094 nl80211_send(req, NULL, NULL);
2095 nl80211_free(req);
2096 }
2097
2098 nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
2099
2100 req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
2101 if (req)
2102 {
2103 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
2104 nl80211_free(req);
2105 }
2106
2107 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
2108 return *len ? 0 : -1;
2109 }
2110
2111 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
2112 {
2113 #define hex(x) \
2114 (((x) >= 'a') ? ((x) - 'a' + 10) : \
2115 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0')))
2116
2117 int len = 0;
2118
2119 while (*in)
2120 {
2121 if (len + 1 >= outlen)
2122 break;
2123
2124 switch (*in)
2125 {
2126 case '\\':
2127 in++;
2128 switch (*in)
2129 {
2130 case 'n':
2131 out[len++] = '\n'; in++;
2132 break;
2133
2134 case 'r':
2135 out[len++] = '\r'; in++;
2136 break;
2137
2138 case 't':
2139 out[len++] = '\t'; in++;
2140 break;
2141
2142 case 'e':
2143 out[len++] = '\033'; in++;
2144 break;
2145
2146 case 'x':
2147 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
2148 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
2149 in += 3;
2150 break;
2151
2152 default:
2153 out[len++] = *in++;
2154 break;
2155 }
2156 break;
2157
2158 default:
2159 out[len++] = *in++;
2160 break;
2161 }
2162 }
2163
2164 if (outlen > len)
2165 out[len] = '\0';
2166
2167 return len;
2168 }
2169
2170 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len)
2171 {
2172 int sock, qmax, rssi, tries, count = -1, ready = 0;
2173 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096];
2174 struct sockaddr_un local = { 0 };
2175 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
2176
2177 sock = nl80211_wpactl_connect(ifname, &local);
2178
2179 if (sock < 0)
2180 return sock;
2181
2182 send(sock, "ATTACH", 6, 0);
2183 send(sock, "SCAN", 4, 0);
2184
2185 /*
2186 * wait for scan results:
2187 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan
2188 * 72 channels at most. We'll also receive two "OK" messages acknowledging
2189 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra
2190 * time to process the results, so try 72 + 2 + 1 times.
2191 */
2192 for (tries = 0; tries < 75; tries++)
2193 {
2194 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0)
2195 continue;
2196
2197 /* got an event notification */
2198 if (reply[0] == '<')
2199 {
2200 /* scan results are ready */
2201 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS"))
2202 {
2203 /* send "SCAN_RESULTS" command */
2204 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12);
2205 break;
2206 }
2207
2208 /* is another unrelated event, retry */
2209 tries--;
2210 }
2211 }
2212
2213 /* receive and parse scan results if the wait above didn't time out */
2214 if (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
2215 {
2216 nl80211_get_quality_max(ifname, &qmax);
2217
2218 for (line = strtok_r(reply, "\n", &pos);
2219 line != NULL;
2220 line = strtok_r(NULL, "\n", &pos))
2221 {
2222 /* skip header line */
2223 if (count < 0)
2224 {
2225 count++;
2226 continue;
2227 }
2228
2229 bssid = strtok(line, "\t");
2230 freq = strtok(NULL, "\t");
2231 signal = strtok(NULL, "\t");
2232 flags = strtok(NULL, "\t");
2233 ssid = strtok(NULL, "\n");
2234
2235 if (!bssid || !freq || !signal || !flags || !ssid)
2236 continue;
2237
2238 /* BSSID */
2239 e->mac[0] = strtol(&bssid[0], NULL, 16);
2240 e->mac[1] = strtol(&bssid[3], NULL, 16);
2241 e->mac[2] = strtol(&bssid[6], NULL, 16);
2242 e->mac[3] = strtol(&bssid[9], NULL, 16);
2243 e->mac[4] = strtol(&bssid[12], NULL, 16);
2244 e->mac[5] = strtol(&bssid[15], NULL, 16);
2245
2246 /* SSID */
2247 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2248
2249 /* Mode */
2250 if (strstr(flags, "[MESH]"))
2251 e->mode = IWINFO_OPMODE_MESHPOINT;
2252 else if (strstr(flags, "[IBSS]"))
2253 e->mode = IWINFO_OPMODE_ADHOC;
2254 else
2255 e->mode = IWINFO_OPMODE_MASTER;
2256
2257 /* Channel */
2258 e->channel = nl80211_freq2channel(atoi(freq));
2259
2260 /* Signal */
2261 rssi = atoi(signal);
2262 e->signal = rssi;
2263
2264 /* Quality */
2265 if (rssi < 0)
2266 {
2267 /* The cfg80211 wext compat layer assumes a signal range
2268 * of -110 dBm to -40 dBm, the quality value is derived
2269 * by adding 110 to the signal level */
2270 if (rssi < -110)
2271 rssi = -110;
2272 else if (rssi > -40)
2273 rssi = -40;
2274
2275 e->quality = (rssi + 110);
2276 }
2277 else
2278 {
2279 e->quality = rssi;
2280 }
2281
2282 /* Max. Quality */
2283 e->quality_max = qmax;
2284
2285 /* Crypto */
2286 nl80211_get_scancrypto(flags, &e->crypto);
2287
2288 count++;
2289 e++;
2290 }
2291
2292 *len = count * sizeof(struct iwinfo_scanlist_entry);
2293 }
2294
2295 close(sock);
2296 unlink(local.sun_path);
2297
2298 return (count >= 0) ? 0 : -1;
2299 }
2300
2301 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
2302 {
2303 char *res;
2304 int rv, mode;
2305
2306 *len = 0;
2307
2308 /* Got a radioX pseudo interface, find some interface on it or create one */
2309 if (!strncmp(ifname, "radio", 5))
2310 {
2311 /* Reuse existing interface */
2312 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2313 {
2314 return nl80211_get_scanlist(res, buf, len);
2315 }
2316
2317 /* Need to spawn a temporary iface for scanning */
2318 else if ((res = nl80211_ifadd(ifname)) != NULL)
2319 {
2320 rv = nl80211_get_scanlist(res, buf, len);
2321 nl80211_ifdel(res);
2322 return rv;
2323 }
2324 }
2325
2326 /* WPA supplicant */
2327 if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
2328 {
2329 return 0;
2330 }
2331
2332 /* station / ad-hoc / monitor scan */
2333 else if (!nl80211_get_mode(ifname, &mode) &&
2334 (mode == IWINFO_OPMODE_ADHOC ||
2335 mode == IWINFO_OPMODE_MASTER ||
2336 mode == IWINFO_OPMODE_CLIENT ||
2337 mode == IWINFO_OPMODE_MONITOR) &&
2338 iwinfo_ifup(ifname))
2339 {
2340 return nl80211_get_scanlist_nl(ifname, buf, len);
2341 }
2342
2343 /* AP scan */
2344 else
2345 {
2346 /* Got a temp interface, don't create yet another one */
2347 if (!strncmp(ifname, "tmp.", 4))
2348 {
2349 if (!iwinfo_ifup(ifname))
2350 return -1;
2351
2352 rv = nl80211_get_scanlist_nl(ifname, buf, len);
2353 iwinfo_ifdown(ifname);
2354 return rv;
2355 }
2356
2357 /* Spawn a new scan interface */
2358 else
2359 {
2360 if (!(res = nl80211_ifadd(ifname)))
2361 return -1;
2362
2363 iwinfo_ifmac(res);
2364
2365 /* if we can take the new interface up, the driver supports an
2366 * additional interface and there's no need to tear down the ap */
2367 if (iwinfo_ifup(res))
2368 {
2369 rv = nl80211_get_scanlist_nl(res, buf, len);
2370 iwinfo_ifdown(res);
2371 }
2372
2373 /* driver cannot create secondary interface, take down ap
2374 * during scan */
2375 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2376 {
2377 rv = nl80211_get_scanlist_nl(res, buf, len);
2378 iwinfo_ifdown(res);
2379 iwinfo_ifup(ifname);
2380 nl80211_hostapd_hup(ifname);
2381 }
2382
2383 nl80211_ifdel(res);
2384 return rv;
2385 }
2386 }
2387
2388 return -1;
2389 }
2390
2391 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2392 {
2393 int bands_remain, freqs_remain;
2394
2395 struct nl80211_array_buf *arr = arg;
2396 struct iwinfo_freqlist_entry *e = arr->buf;
2397
2398 struct nlattr **attr = nl80211_parse(msg);
2399 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2400 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2401 struct nlattr *band, *freq;
2402
2403 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2404 {
2405 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2406 nla_data(band), nla_len(band), NULL);
2407
2408 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2409 {
2410 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2411 nla_data(freq), nla_len(freq), NULL);
2412
2413 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2414 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2415 continue;
2416
2417 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2418 e->channel = nl80211_freq2channel(e->mhz);
2419
2420 e->restricted = (
2421 freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
2422 !freqs[NL80211_FREQUENCY_ATTR_RADAR]
2423 ) ? 1 : 0;
2424
2425 e++;
2426 arr->count++;
2427 }
2428 }
2429
2430 return NL_SKIP;
2431 }
2432
2433 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2434 {
2435 struct nl80211_msg_conveyor *req;
2436 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2437
2438 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2439 if (req)
2440 {
2441 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2442 nl80211_free(req);
2443 }
2444
2445 if (arr.count > 0)
2446 {
2447 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2448 return 0;
2449 }
2450
2451 return -1;
2452 }
2453
2454 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2455 {
2456 char *buf = arg;
2457 struct nlattr **attr = nl80211_parse(msg);
2458
2459 if (attr[NL80211_ATTR_REG_ALPHA2])
2460 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2461 else
2462 buf[0] = 0;
2463
2464 return NL_SKIP;
2465 }
2466
2467 static int nl80211_get_country(const char *ifname, char *buf)
2468 {
2469 int rv = -1;
2470 struct nl80211_msg_conveyor *req;
2471
2472 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2473 if (req)
2474 {
2475 nl80211_send(req, nl80211_get_country_cb, buf);
2476 nl80211_free(req);
2477
2478 if (buf[0])
2479 rv = 0;
2480 }
2481
2482 return rv;
2483 }
2484
2485 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2486 {
2487 int count;
2488 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2489 const struct iwinfo_iso3166_label *l;
2490
2491 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2492 {
2493 e->iso3166 = l->iso3166;
2494 e->ccode[0] = (l->iso3166 / 256);
2495 e->ccode[1] = (l->iso3166 % 256);
2496 e->ccode[2] = 0;
2497 }
2498
2499 *len = (count * sizeof(struct iwinfo_country_entry));
2500 return 0;
2501 }
2502
2503
2504 struct nl80211_modes
2505 {
2506 bool ok;
2507 uint32_t hw;
2508 uint32_t ht;
2509 };
2510
2511 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
2512 {
2513 struct nl80211_modes *m = arg;
2514 int bands_remain, freqs_remain;
2515 uint16_t caps = 0;
2516 uint32_t vht_caps = 0;
2517 struct nlattr **attr = nl80211_parse(msg);
2518 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2519 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2520 struct nlattr *band, *freq;
2521
2522 if (attr[NL80211_ATTR_WIPHY_BANDS])
2523 {
2524 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2525 {
2526 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2527 nla_data(band), nla_len(band), NULL);
2528
2529 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2530 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2531
2532 /* Treat any nonzero capability as 11n */
2533 if (caps > 0)
2534 {
2535 m->hw |= IWINFO_80211_N;
2536 m->ht |= IWINFO_HTMODE_HT20;
2537
2538 if (caps & (1 << 1))
2539 m->ht |= IWINFO_HTMODE_HT40;
2540 }
2541
2542 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2543 freqs_remain)
2544 {
2545 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2546 nla_data(freq), nla_len(freq), NULL);
2547
2548 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2549 continue;
2550
2551 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2552 {
2553 m->hw |= IWINFO_80211_B;
2554 m->hw |= IWINFO_80211_G;
2555 }
2556 else if (bands[NL80211_BAND_ATTR_VHT_CAPA])
2557 {
2558 vht_caps = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
2559
2560 /* Treat any nonzero capability as 11ac */
2561 if (vht_caps > 0)
2562 {
2563 m->hw |= IWINFO_80211_AC;
2564 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
2565
2566 switch ((vht_caps >> 2) & 3)
2567 {
2568 case 2:
2569 m->ht |= IWINFO_HTMODE_VHT80_80;
2570 /* fall through */
2571
2572 case 1:
2573 m->ht |= IWINFO_HTMODE_VHT160;
2574 }
2575 }
2576 }
2577 else if (!(m->hw & IWINFO_80211_AC))
2578 {
2579 m->hw |= IWINFO_80211_A;
2580 }
2581 }
2582 }
2583
2584 m->ok = 1;
2585 }
2586
2587 return NL_SKIP;
2588 }
2589
2590 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
2591 {
2592 struct nl80211_msg_conveyor *req;
2593 struct nl80211_modes m = { 0 };
2594
2595 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2596 if (req)
2597 {
2598 nl80211_send(req, nl80211_get_modelist_cb, &m);
2599 nl80211_free(req);
2600 }
2601
2602 if (m.ok)
2603 {
2604 *buf = m.hw;
2605 return 0;
2606 }
2607
2608 return -1;
2609 }
2610
2611 static int nl80211_get_htmodelist(const char *ifname, int *buf)
2612 {
2613 struct nl80211_msg_conveyor *req;
2614 struct nl80211_modes m = { 0 };
2615
2616 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2617 if (req)
2618 {
2619 nl80211_send(req, nl80211_get_modelist_cb, &m);
2620 nl80211_free(req);
2621 }
2622
2623 if (m.ok)
2624 {
2625 *buf = m.ht;
2626 return 0;
2627 }
2628
2629 return -1;
2630 }
2631
2632
2633 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
2634 {
2635 struct nlattr **attr = nl80211_parse(msg);
2636 struct nlattr *comb;
2637 int *ret = arg;
2638 int comb_rem, limit_rem, mode_rem;
2639
2640 *ret = 0;
2641 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
2642 return NL_SKIP;
2643
2644 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
2645 {
2646 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
2647 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
2648 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
2649 };
2650 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1];
2651 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
2652 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
2653 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
2654 };
2655 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1];
2656 struct nlattr *limit;
2657
2658 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy);
2659
2660 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
2661 continue;
2662
2663 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
2664 {
2665 struct nlattr *mode;
2666
2667 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
2668
2669 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
2670 !tb_limit[NL80211_IFACE_LIMIT_MAX])
2671 continue;
2672
2673 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
2674 continue;
2675
2676 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
2677 if (nla_type(mode) == NL80211_IFTYPE_AP)
2678 *ret = 1;
2679 }
2680 }
2681 }
2682
2683 return NL_SKIP;
2684 }
2685
2686 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
2687 {
2688 struct nl80211_msg_conveyor *req;
2689
2690 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2691 if (!req)
2692 return -1;
2693
2694 nl80211_send(req, nl80211_get_ifcomb_cb, buf);
2695 nl80211_free(req);
2696 return 0;
2697 }
2698
2699 static int nl80211_get_hardware_id(const char *ifname, char *buf)
2700 {
2701 int rv = -1;
2702 char *res;
2703
2704 /* Got a radioX pseudo interface, find some interface on it or create one */
2705 if (!strncmp(ifname, "radio", 5))
2706 {
2707 /* Reuse existing interface */
2708 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2709 {
2710 rv = wext_ops.hardware_id(res, buf);
2711 }
2712
2713 /* Need to spawn a temporary iface for finding IDs */
2714 else if ((res = nl80211_ifadd(ifname)) != NULL)
2715 {
2716 rv = wext_ops.hardware_id(res, buf);
2717 nl80211_ifdel(res);
2718 }
2719 }
2720 else
2721 {
2722 rv = wext_ops.hardware_id(ifname, buf);
2723 }
2724
2725 /* Failed to obtain hardware IDs, search board config */
2726 if (rv)
2727 {
2728 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2729 }
2730
2731 return rv;
2732 }
2733
2734 static const struct iwinfo_hardware_entry *
2735 nl80211_get_hardware_entry(const char *ifname)
2736 {
2737 struct iwinfo_hardware_id id;
2738
2739 if (nl80211_get_hardware_id(ifname, (char *)&id))
2740 return NULL;
2741
2742 return iwinfo_hardware(&id);
2743 }
2744
2745 static int nl80211_get_hardware_name(const char *ifname, char *buf)
2746 {
2747 const struct iwinfo_hardware_entry *hw;
2748
2749 if (!(hw = nl80211_get_hardware_entry(ifname)))
2750 sprintf(buf, "Generic MAC80211");
2751 else
2752 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2753
2754 return 0;
2755 }
2756
2757 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
2758 {
2759 const struct iwinfo_hardware_entry *hw;
2760
2761 if (!(hw = nl80211_get_hardware_entry(ifname)))
2762 return -1;
2763
2764 *buf = hw->txpower_offset;
2765 return 0;
2766 }
2767
2768 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
2769 {
2770 const struct iwinfo_hardware_entry *hw;
2771
2772 if (!(hw = nl80211_get_hardware_entry(ifname)))
2773 return -1;
2774
2775 *buf = hw->frequency_offset;
2776 return 0;
2777 }
2778
2779 static int nl80211_lookup_phyname(const char *section, char *buf)
2780 {
2781 int idx;
2782
2783 if ((idx = nl80211_phy_idx_from_uci(section)) < 0)
2784 return -1;
2785
2786 sprintf(buf, "phy%d", idx);
2787 return 0;
2788 }
2789
2790 const struct iwinfo_ops nl80211_ops = {
2791 .name = "nl80211",
2792 .probe = nl80211_probe,
2793 .channel = nl80211_get_channel,
2794 .frequency = nl80211_get_frequency,
2795 .frequency_offset = nl80211_get_frequency_offset,
2796 .txpower = nl80211_get_txpower,
2797 .txpower_offset = nl80211_get_txpower_offset,
2798 .bitrate = nl80211_get_bitrate,
2799 .signal = nl80211_get_signal,
2800 .noise = nl80211_get_noise,
2801 .quality = nl80211_get_quality,
2802 .quality_max = nl80211_get_quality_max,
2803 .mbssid_support = nl80211_get_mbssid_support,
2804 .hwmodelist = nl80211_get_hwmodelist,
2805 .htmodelist = nl80211_get_htmodelist,
2806 .mode = nl80211_get_mode,
2807 .ssid = nl80211_get_ssid,
2808 .bssid = nl80211_get_bssid,
2809 .country = nl80211_get_country,
2810 .hardware_id = nl80211_get_hardware_id,
2811 .hardware_name = nl80211_get_hardware_name,
2812 .encryption = nl80211_get_encryption,
2813 .phyname = nl80211_get_phyname,
2814 .assoclist = nl80211_get_assoclist,
2815 .txpwrlist = nl80211_get_txpwrlist,
2816 .scanlist = nl80211_get_scanlist,
2817 .freqlist = nl80211_get_freqlist,
2818 .countrylist = nl80211_get_countrylist,
2819 .lookup_phy = nl80211_lookup_phyname,
2820 .close = nl80211_close
2821 };
Library for accessing wireless device drivers