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67d551c3bc799997885467b8ae932c87aa732774
[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 (req)
222 nlmsg_free(req);
223
224 return NULL;
225 }
226
227 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
228 {
229 if (nl80211_init() < 0)
230 return NULL;
231
232 return nl80211_new(nls->nlctrl, cmd, flags);
233 }
234
235 static int nl80211_phy_idx_from_uci_path(struct uci_section *s)
236 {
237 const char *opt;
238 char buf[128];
239 int idx = -1;
240 glob_t gl;
241
242 opt = uci_lookup_option_string(uci_ctx, s, "path");
243 if (!opt)
244 return -1;
245
246 snprintf(buf, sizeof(buf), "/sys/devices/%s/ieee80211/*/index", opt); /**/
247 if (glob(buf, 0, NULL, &gl))
248 return -1;
249
250 if (gl.gl_pathc > 0)
251 idx = nl80211_readint(gl.gl_pathv[0]);
252
253 globfree(&gl);
254
255 return idx;
256 }
257
258 static int nl80211_phy_idx_from_uci_macaddr(struct uci_section *s)
259 {
260 const char *opt;
261 char buf[128];
262 int i, idx = -1;
263 glob_t gl;
264
265 opt = uci_lookup_option_string(uci_ctx, s, "macaddr");
266 if (!opt)
267 return -1;
268
269 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/*"); /**/
270 if (glob(buf, 0, NULL, &gl))
271 return -1;
272
273 for (i = 0; i < gl.gl_pathc; i++)
274 {
275 snprintf(buf, sizeof(buf), "%s/macaddress", gl.gl_pathv[i]);
276 if (nl80211_readstr(buf, buf, sizeof(buf)) <= 0)
277 continue;
278
279 if (fnmatch(opt, buf, FNM_CASEFOLD))
280 continue;
281
282 snprintf(buf, sizeof(buf), "%s/index", gl.gl_pathv[i]);
283 if ((idx = nl80211_readint(buf)) > -1)
284 break;
285 }
286
287 globfree(&gl);
288
289 return idx;
290 }
291
292 static int nl80211_phy_idx_from_uci_phy(struct uci_section *s)
293 {
294 const char *opt;
295 char buf[128];
296
297 opt = uci_lookup_option_string(uci_ctx, s, "phy");
298 if (!opt)
299 return -1;
300
301 snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", opt);
302 return nl80211_readint(buf);
303 }
304
305 static int nl80211_phy_idx_from_uci(const char *name)
306 {
307 struct uci_section *s;
308 int idx = -1;
309
310 s = iwinfo_uci_get_radio(name, "mac80211");
311 if (!s)
312 goto free;
313
314 idx = nl80211_phy_idx_from_uci_path(s);
315
316 if (idx < 0)
317 idx = nl80211_phy_idx_from_uci_macaddr(s);
318
319 if (idx < 0)
320 idx = nl80211_phy_idx_from_uci_phy(s);
321
322 free:
323 iwinfo_uci_free();
324 return idx;
325 }
326
327 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
328 int cmd, int flags)
329 {
330 int ifidx = -1, phyidx = -1;
331 struct nl80211_msg_conveyor *cv;
332
333 if (ifname == NULL)
334 return NULL;
335
336 if (nl80211_init() < 0)
337 return NULL;
338
339 if (!strncmp(ifname, "phy", 3))
340 phyidx = atoi(&ifname[3]);
341 else if (!strncmp(ifname, "radio", 5))
342 phyidx = nl80211_phy_idx_from_uci(ifname);
343 else if (!strncmp(ifname, "mon.", 4))
344 ifidx = if_nametoindex(&ifname[4]);
345 else
346 ifidx = if_nametoindex(ifname);
347
348 /* Valid ifidx must be greater than 0 */
349 if ((ifidx <= 0) && (phyidx < 0))
350 return NULL;
351
352 cv = nl80211_new(nls->nl80211, cmd, flags);
353 if (!cv)
354 return NULL;
355
356 if (ifidx > -1)
357 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
358
359 if (phyidx > -1)
360 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
361
362 return cv;
363
364 nla_put_failure:
365 nl80211_free(cv);
366 return NULL;
367 }
368
369 static struct nl80211_msg_conveyor * nl80211_send(
370 struct nl80211_msg_conveyor *cv,
371 int (*cb_func)(struct nl_msg *, void *), void *cb_arg
372 ) {
373 static struct nl80211_msg_conveyor rcv;
374 int err = 1;
375
376 if (cb_func)
377 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
378 else
379 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
380
381 if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
382 goto err;
383
384 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
385 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
386 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
387
388 while (err > 0)
389 nl_recvmsgs(nls->nl_sock, cv->cb);
390
391 return &rcv;
392
393 err:
394 nl_cb_put(cv->cb);
395 nlmsg_free(cv->msg);
396
397 return NULL;
398 }
399
400 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
401 {
402 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
403 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
404
405 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
406 genlmsg_attrlen(gnlh, 0), NULL);
407
408 return attr;
409 }
410
411
412 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
413 {
414 struct nl80211_group_conveyor *cv = arg;
415
416 struct nlattr **attr = nl80211_parse(msg);
417 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
418 struct nlattr *mgrp;
419 int mgrpidx;
420
421 if (!attr[CTRL_ATTR_MCAST_GROUPS])
422 return NL_SKIP;
423
424 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
425 {
426 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
427 nla_data(mgrp), nla_len(mgrp), NULL);
428
429 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
430 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
431 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
432 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
433 {
434 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
435 break;
436 }
437 }
438
439 return NL_SKIP;
440 }
441
442 static int nl80211_subscribe(const char *family, const char *group)
443 {
444 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
445 struct nl80211_msg_conveyor *req;
446
447 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
448 if (req)
449 {
450 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
451 nl80211_send(req, nl80211_subscribe_cb, &cv);
452
453 nla_put_failure:
454 nl80211_free(req);
455 }
456
457 return nl_socket_add_membership(nls->nl_sock, cv.id);
458 }
459
460
461 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
462 {
463 struct nl80211_event_conveyor *cv = arg;
464 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
465
466 if (gnlh->cmd == cv->wait)
467 cv->recv = gnlh->cmd;
468
469 return NL_SKIP;
470 }
471
472 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
473 {
474 return NL_OK;
475 }
476
477 static int nl80211_wait(const char *family, const char *group, int cmd)
478 {
479 struct nl80211_event_conveyor cv = { .wait = cmd };
480 struct nl_cb *cb;
481
482 if (nl80211_subscribe(family, group))
483 return -ENOENT;
484
485 cb = nl_cb_alloc(NL_CB_DEFAULT);
486
487 if (!cb)
488 return -ENOMEM;
489
490 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
491 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
492
493 while (!cv.recv)
494 nl_recvmsgs(nls->nl_sock, cb);
495
496 nl_cb_put(cb);
497
498 return 0;
499 }
500
501
502 static int nl80211_freq2channel(int freq)
503 {
504 if (freq == 2484)
505 return 14;
506 else if (freq < 2484)
507 return (freq - 2407) / 5;
508 else if (freq >= 4910 && freq <= 4980)
509 return (freq - 4000) / 5;
510 else
511 return (freq - 5000) / 5;
512 }
513
514 static int nl80211_channel2freq(int channel, const char *band)
515 {
516 if (!band || band[0] != 'a')
517 {
518 if (channel == 14)
519 return 2484;
520 else if (channel < 14)
521 return (channel * 5) + 2407;
522 }
523 else
524 {
525 if (channel >= 182 && channel <= 196)
526 return (channel * 5) + 4000;
527 else
528 return (channel * 5) + 5000;
529 }
530
531 return 0;
532 }
533
534 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
535 {
536 char *buf = arg;
537 struct nlattr **attr = nl80211_parse(msg);
538
539 if (attr[NL80211_ATTR_WIPHY_NAME])
540 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
541 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
542 else
543 buf[0] = 0;
544
545 return NL_SKIP;
546 }
547
548 static char * nl80211_ifname2phy(const char *ifname)
549 {
550 static char phy[32] = { 0 };
551 struct nl80211_msg_conveyor *req;
552
553 memset(phy, 0, sizeof(phy));
554
555 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
556 if (req)
557 {
558 nl80211_send(req, nl80211_ifname2phy_cb, phy);
559 nl80211_free(req);
560 }
561
562 return phy[0] ? phy : NULL;
563 }
564
565 static char * nl80211_phy2ifname(const char *ifname)
566 {
567 int ifidx = -1, cifidx = -1, phyidx = -1;
568 char buffer[64];
569 static char nif[IFNAMSIZ] = { 0 };
570
571 DIR *d;
572 struct dirent *e;
573
574 /* Only accept phy name of the form phy%d or radio%d */
575 if (!ifname)
576 return NULL;
577 else if (!strncmp(ifname, "phy", 3))
578 phyidx = atoi(&ifname[3]);
579 else if (!strncmp(ifname, "radio", 5))
580 phyidx = nl80211_phy_idx_from_uci(ifname);
581 else
582 return NULL;
583
584 memset(nif, 0, sizeof(nif));
585
586 if (phyidx > -1)
587 {
588 if ((d = opendir("/sys/class/net")) != NULL)
589 {
590 while ((e = readdir(d)) != NULL)
591 {
592 snprintf(buffer, sizeof(buffer),
593 "/sys/class/net/%s/phy80211/index", e->d_name);
594
595 if (nl80211_readint(buffer) == phyidx)
596 {
597 snprintf(buffer, sizeof(buffer),
598 "/sys/class/net/%s/ifindex", e->d_name);
599
600 if ((cifidx = nl80211_readint(buffer)) >= 0 &&
601 ((ifidx < 0) || (cifidx < ifidx)))
602 {
603 ifidx = cifidx;
604 strncpy(nif, e->d_name, sizeof(nif) - 1);
605 }
606 }
607 }
608
609 closedir(d);
610 }
611 }
612
613 return nif[0] ? nif : NULL;
614 }
615
616 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
617 {
618 int *mode = arg;
619 struct nlattr **tb = nl80211_parse(msg);
620 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
621 IWINFO_OPMODE_UNKNOWN, /* unspecified */
622 IWINFO_OPMODE_ADHOC, /* IBSS */
623 IWINFO_OPMODE_CLIENT, /* managed */
624 IWINFO_OPMODE_MASTER, /* AP */
625 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
626 IWINFO_OPMODE_WDS, /* WDS */
627 IWINFO_OPMODE_MONITOR, /* monitor */
628 IWINFO_OPMODE_MESHPOINT, /* mesh point */
629 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
630 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
631 };
632
633 if (tb[NL80211_ATTR_IFTYPE])
634 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
635
636 return NL_SKIP;
637 }
638
639
640 static int nl80211_get_mode(const char *ifname, int *buf)
641 {
642 char *res;
643 struct nl80211_msg_conveyor *req;
644
645 res = nl80211_phy2ifname(ifname);
646 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
647 *buf = IWINFO_OPMODE_UNKNOWN;
648
649 if (req)
650 {
651 nl80211_send(req, nl80211_get_mode_cb, buf);
652 nl80211_free(req);
653 }
654
655 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
656 }
657
658 static int __nl80211_hostapd_query(const char *ifname, ...)
659 {
660 va_list ap, ap_cur;
661 char *phy, *search, *dest, *key, *val, buf[128];
662 int len, mode, found = 0, match = 1;
663 FILE *fp;
664
665 if (nl80211_get_mode(ifname, &mode))
666 return 0;
667
668 if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN)
669 return 0;
670
671 phy = nl80211_ifname2phy(ifname);
672
673 if (!phy)
674 return 0;
675
676 snprintf(buf, sizeof(buf), "/var/run/hostapd-%s.conf", phy);
677 fp = fopen(buf, "r");
678
679 if (!fp)
680 return 0;
681
682 va_start(ap, ifname);
683
684 /* clear all destination buffers */
685 va_copy(ap_cur, ap);
686
687 while ((search = va_arg(ap_cur, char *)) != NULL)
688 {
689 dest = va_arg(ap_cur, char *);
690 len = va_arg(ap_cur, int);
691
692 memset(dest, 0, len);
693 }
694
695 va_end(ap_cur);
696
697 /* iterate applicable lines and copy found values into dest buffers */
698 while (fgets(buf, sizeof(buf), fp))
699 {
700 key = strtok(buf, " =\t\n");
701 val = strtok(NULL, "\n");
702
703 if (!key || !val || !*key || *key == '#')
704 continue;
705
706 if (!strcmp(key, "interface") || !strcmp(key, "bss"))
707 match = !strcmp(ifname, val);
708
709 if (!match)
710 continue;
711
712 va_copy(ap_cur, ap);
713
714 while ((search = va_arg(ap_cur, char *)) != NULL)
715 {
716 dest = va_arg(ap_cur, char *);
717 len = va_arg(ap_cur, int);
718
719 if (!strcmp(search, key))
720 {
721 strncpy(dest, val, len - 1);
722 found++;
723 break;
724 }
725 }
726
727 va_end(ap_cur);
728 }
729
730 fclose(fp);
731
732 va_end(ap);
733
734 return found;
735 }
736
737 #define nl80211_hostapd_query(ifname, ...) \
738 __nl80211_hostapd_query(ifname, ##__VA_ARGS__, NULL)
739
740
741 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
742 {
743 fd_set rfds;
744 struct timeval tv = { 0, 256000 };
745
746 FD_ZERO(&rfds);
747 FD_SET(sock, &rfds);
748
749 memset(buf, 0, blen);
750
751 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
752 return -1;
753
754 if (!FD_ISSET(sock, &rfds))
755 return -1;
756
757 return recv(sock, buf, blen - 1, 0);
758 }
759
760 static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local)
761 {
762 struct sockaddr_un remote = { 0 };
763 size_t remote_length, local_length;
764
765 int sock = socket(PF_UNIX, SOCK_DGRAM, 0);
766 if (sock < 0)
767 return sock;
768
769 remote.sun_family = AF_UNIX;
770 remote_length = sizeof(remote.sun_family) +
771 sprintf(remote.sun_path, "/var/run/wpa_supplicant-%s/%s",
772 ifname, ifname);
773
774 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
775 {
776 close(sock);
777 return -1;
778 }
779
780 if (connect(sock, (struct sockaddr *)&remote, remote_length))
781 {
782 remote_length = sizeof(remote.sun_family) +
783 sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname);
784
785 if (connect(sock, (struct sockaddr *)&remote, remote_length))
786 {
787 close(sock);
788 return -1;
789 }
790 }
791
792 local->sun_family = AF_UNIX;
793 local_length = sizeof(local->sun_family) +
794 sprintf(local->sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
795
796 if (bind(sock, (struct sockaddr *)local, local_length) < 0)
797 {
798 close(sock);
799 return -1;
800 }
801
802 return sock;
803 }
804
805 static int __nl80211_wpactl_query(const char *ifname, ...)
806 {
807 va_list ap, ap_cur;
808 struct sockaddr_un local = { 0 };
809 int len, mode, found = 0, sock = -1;
810 char *search, *dest, *key, *val, *line, *pos, buf[512];
811
812 if (nl80211_get_mode(ifname, &mode))
813 return 0;
814
815 if (mode != IWINFO_OPMODE_CLIENT && mode != IWINFO_OPMODE_ADHOC)
816 return 0;
817
818 sock = nl80211_wpactl_connect(ifname, &local);
819
820 if (sock < 0)
821 return 0;
822
823 va_start(ap, ifname);
824
825 /* clear all destination buffers */
826 va_copy(ap_cur, ap);
827
828 while ((search = va_arg(ap_cur, char *)) != NULL)
829 {
830 dest = va_arg(ap_cur, char *);
831 len = va_arg(ap_cur, int);
832
833 memset(dest, 0, len);
834 }
835
836 va_end(ap_cur);
837
838 send(sock, "STATUS", 6, 0);
839
840 while (true)
841 {
842 if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0)
843 break;
844
845 if (buf[0] == '<')
846 continue;
847
848 for (line = strtok_r(buf, "\n", &pos);
849 line != NULL;
850 line = strtok_r(NULL, "\n", &pos))
851 {
852 key = strtok(line, "=");
853 val = strtok(NULL, "\n");
854
855 if (!key || !val)
856 continue;
857
858 va_copy(ap_cur, ap);
859
860 while ((search = va_arg(ap_cur, char *)) != NULL)
861 {
862 dest = va_arg(ap_cur, char *);
863 len = va_arg(ap_cur, int);
864
865 if (!strcmp(search, key))
866 {
867 strncpy(dest, val, len - 1);
868 found++;
869 break;
870 }
871 }
872
873 va_end(ap_cur);
874 }
875
876 break;
877 }
878
879 va_end(ap);
880
881 close(sock);
882 unlink(local.sun_path);
883
884 return found;
885 }
886
887 #define nl80211_wpactl_query(ifname, ...) \
888 __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL)
889
890
891 static char * nl80211_ifadd(const char *ifname)
892 {
893 char *rv = NULL, path[PATH_MAX];
894 static char nif[IFNAMSIZ] = { 0 };
895 struct nl80211_msg_conveyor *req;
896 FILE *sysfs;
897
898 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
899 if (req)
900 {
901 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
902
903 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
904 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
905
906 nl80211_send(req, NULL, NULL);
907
908 snprintf(path, sizeof(path) - 1,
909 "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif);
910
911 if ((sysfs = fopen(path, "w")) != NULL)
912 {
913 fwrite("0\n", 1, 2, sysfs);
914 fclose(sysfs);
915 }
916
917 rv = nif;
918
919 nla_put_failure:
920 nl80211_free(req);
921 }
922
923 return rv;
924 }
925
926 static void nl80211_ifdel(const char *ifname)
927 {
928 struct nl80211_msg_conveyor *req;
929
930 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
931 if (req)
932 {
933 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
934
935 nl80211_send(req, NULL, NULL);
936
937 nla_put_failure:
938 nl80211_free(req);
939 }
940 }
941
942 static void nl80211_hostapd_hup(const char *ifname)
943 {
944 int fd, pid = 0;
945 char buf[32];
946 char *phy = nl80211_ifname2phy(ifname);
947
948 if (phy)
949 {
950 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
951 if ((fd = open(buf, O_RDONLY)) >= 0)
952 {
953 if (read(fd, buf, sizeof(buf)) > 0)
954 pid = atoi(buf);
955
956 close(fd);
957 }
958
959 if (pid > 0)
960 kill(pid, 1);
961 }
962 }
963
964
965 static int nl80211_probe(const char *ifname)
966 {
967 return !!nl80211_ifname2phy(ifname);
968 }
969
970 struct nl80211_ssid_bssid {
971 unsigned char *ssid;
972 unsigned char bssid[7];
973 };
974
975 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
976 {
977 int ielen;
978 unsigned char *ie;
979 struct nl80211_ssid_bssid *sb = arg;
980 struct nlattr **tb = nl80211_parse(msg);
981 struct nlattr *bss[NL80211_BSS_MAX + 1];
982
983 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
984 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
985 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
986 };
987
988 if (!tb[NL80211_ATTR_BSS] ||
989 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
990 bss_policy) ||
991 !bss[NL80211_BSS_BSSID] ||
992 !bss[NL80211_BSS_STATUS] ||
993 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
994 {
995 return NL_SKIP;
996 }
997
998 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
999 {
1000 case NL80211_BSS_STATUS_ASSOCIATED:
1001 case NL80211_BSS_STATUS_AUTHENTICATED:
1002 case NL80211_BSS_STATUS_IBSS_JOINED:
1003
1004 if (sb->ssid)
1005 {
1006 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1007 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1008
1009 while (ielen >= 2 && ielen >= ie[1])
1010 {
1011 if (ie[0] == 0)
1012 {
1013 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1014 return NL_SKIP;
1015 }
1016
1017 ielen -= ie[1] + 2;
1018 ie += ie[1] + 2;
1019 }
1020 }
1021 else
1022 {
1023 sb->bssid[0] = 1;
1024 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
1025 return NL_SKIP;
1026 }
1027
1028 default:
1029 return NL_SKIP;
1030 }
1031 }
1032
1033 static int nl80211_get_ssid(const char *ifname, char *buf)
1034 {
1035 char *res;
1036 struct nl80211_msg_conveyor *req;
1037 struct nl80211_ssid_bssid sb;
1038
1039 /* try to find ssid from scan dump results */
1040 res = nl80211_phy2ifname(ifname);
1041 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1042
1043 sb.ssid = (unsigned char *)buf;
1044 *buf = 0;
1045
1046 if (req)
1047 {
1048 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
1049 nl80211_free(req);
1050 }
1051
1052 /* failed, try to find from hostapd info */
1053 if (*buf == 0)
1054 nl80211_hostapd_query(ifname, "ssid", buf, IWINFO_ESSID_MAX_SIZE + 1);
1055
1056 return (*buf == 0) ? -1 : 0;
1057 }
1058
1059 static int nl80211_get_bssid(const char *ifname, char *buf)
1060 {
1061 char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")];
1062 struct nl80211_msg_conveyor *req;
1063 struct nl80211_ssid_bssid sb;
1064
1065 /* try to find bssid from scan dump results */
1066 res = nl80211_phy2ifname(ifname);
1067 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1068
1069 sb.ssid = NULL;
1070 sb.bssid[0] = 0;
1071
1072 if (req)
1073 {
1074 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
1075 nl80211_free(req);
1076 }
1077
1078 /* failed, try to find mac from hostapd info */
1079 if ((sb.bssid[0] == 0) &&
1080 nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid)))
1081 {
1082 sb.bssid[0] = 1;
1083 sb.bssid[1] = strtol(&bssid[0], NULL, 16);
1084 sb.bssid[2] = strtol(&bssid[3], NULL, 16);
1085 sb.bssid[3] = strtol(&bssid[6], NULL, 16);
1086 sb.bssid[4] = strtol(&bssid[9], NULL, 16);
1087 sb.bssid[5] = strtol(&bssid[12], NULL, 16);
1088 sb.bssid[6] = strtol(&bssid[15], NULL, 16);
1089 }
1090
1091 if (sb.bssid[0])
1092 {
1093 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
1094 sb.bssid[1], sb.bssid[2], sb.bssid[3],
1095 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
1096
1097 return 0;
1098 }
1099
1100 return -1;
1101 }
1102
1103
1104 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
1105 {
1106 int *freq = arg;
1107 struct nlattr **attr = nl80211_parse(msg);
1108 struct nlattr *binfo[NL80211_BSS_MAX + 1];
1109
1110 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1111 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1112 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1113 };
1114
1115 if (attr[NL80211_ATTR_BSS] &&
1116 !nla_parse_nested(binfo, NL80211_BSS_MAX,
1117 attr[NL80211_ATTR_BSS], bss_policy))
1118 {
1119 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
1120 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
1121 }
1122
1123 return NL_SKIP;
1124 }
1125
1126 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
1127 {
1128 int *freq = arg;
1129 struct nlattr **tb = nl80211_parse(msg);
1130
1131 if (tb[NL80211_ATTR_WIPHY_FREQ])
1132 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
1133
1134 return NL_SKIP;
1135 }
1136
1137 static int nl80211_get_frequency(const char *ifname, int *buf)
1138 {
1139 char *res, channel[4], hwmode[2];
1140 struct nl80211_msg_conveyor *req;
1141
1142 /* try to find frequency from interface info */
1143 res = nl80211_phy2ifname(ifname);
1144 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
1145 *buf = 0;
1146
1147 if (req)
1148 {
1149 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
1150 nl80211_free(req);
1151 }
1152
1153 /* failed, try to find frequency from hostapd info */
1154 if ((*buf == 0) &&
1155 nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode),
1156 "channel", channel, sizeof(channel)) == 2)
1157 {
1158 *buf = nl80211_channel2freq(atoi(channel), hwmode);
1159 }
1160
1161 /* failed, try to find frequency from scan results */
1162 if (*buf == 0)
1163 {
1164 res = nl80211_phy2ifname(ifname);
1165 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1166
1167 if (req)
1168 {
1169 nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
1170 nl80211_free(req);
1171 }
1172 }
1173
1174 return (*buf == 0) ? -1 : 0;
1175 }
1176
1177 static int nl80211_get_channel(const char *ifname, int *buf)
1178 {
1179 if (!nl80211_get_frequency(ifname, buf))
1180 {
1181 *buf = nl80211_freq2channel(*buf);
1182 return 0;
1183 }
1184
1185 return -1;
1186 }
1187
1188 static int nl80211_get_txpower_cb(struct nl_msg *msg, void *arg)
1189 {
1190 int *buf = arg;
1191 struct nlattr **tb = nl80211_parse(msg);
1192
1193 if (tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL])
1194 *buf = iwinfo_mbm2dbm(nla_get_u32(tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL]));
1195
1196 return NL_SKIP;
1197 }
1198
1199 static int nl80211_get_txpower(const char *ifname, int *buf)
1200 {
1201 char *res;
1202 struct nl80211_msg_conveyor *req;
1203
1204 res = nl80211_phy2ifname(ifname);
1205 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
1206
1207 if (req)
1208 {
1209 *buf = 0;
1210 nl80211_send(req, nl80211_get_txpower_cb, buf);
1211 nl80211_free(req);
1212 if (*buf)
1213 return 0;
1214 }
1215
1216 return -1;
1217 }
1218
1219
1220 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1221 {
1222 int8_t dbm;
1223 int16_t mbit;
1224 struct nl80211_rssi_rate *rr = arg;
1225 struct nlattr **attr = nl80211_parse(msg);
1226 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1227 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1228
1229 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1230 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1231 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1232 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1233 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1234 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1235 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1236 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1237 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1238 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1239 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1240 };
1241
1242 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1243 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1244 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1245 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1246 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1247 };
1248
1249 if (attr[NL80211_ATTR_STA_INFO])
1250 {
1251 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1252 attr[NL80211_ATTR_STA_INFO], stats_policy))
1253 {
1254 if (sinfo[NL80211_STA_INFO_SIGNAL])
1255 {
1256 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1257 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1258 }
1259
1260 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1261 {
1262 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1263 sinfo[NL80211_STA_INFO_TX_BITRATE],
1264 rate_policy))
1265 {
1266 if (rinfo[NL80211_RATE_INFO_BITRATE])
1267 {
1268 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1269 rr->rate = rr->rate
1270 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1271 }
1272 }
1273 }
1274 }
1275 }
1276
1277 return NL_SKIP;
1278 }
1279
1280 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1281 {
1282 DIR *d;
1283 struct dirent *de;
1284 struct nl80211_msg_conveyor *req;
1285
1286 r->rssi = 0;
1287 r->rate = 0;
1288
1289 if ((d = opendir("/sys/class/net")) != NULL)
1290 {
1291 while ((de = readdir(d)) != NULL)
1292 {
1293 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1294 (!de->d_name[strlen(ifname)] ||
1295 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1296 {
1297 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1298 NLM_F_DUMP);
1299
1300 if (req)
1301 {
1302 nl80211_send(req, nl80211_fill_signal_cb, r);
1303 nl80211_free(req);
1304 }
1305 }
1306 }
1307
1308 closedir(d);
1309 }
1310 }
1311
1312 static int nl80211_get_bitrate(const char *ifname, int *buf)
1313 {
1314 struct nl80211_rssi_rate rr;
1315
1316 nl80211_fill_signal(ifname, &rr);
1317
1318 if (rr.rate)
1319 {
1320 *buf = (rr.rate * 100);
1321 return 0;
1322 }
1323
1324 return -1;
1325 }
1326
1327 static int nl80211_get_signal(const char *ifname, int *buf)
1328 {
1329 struct nl80211_rssi_rate rr;
1330
1331 nl80211_fill_signal(ifname, &rr);
1332
1333 if (rr.rssi)
1334 {
1335 *buf = rr.rssi;
1336 return 0;
1337 }
1338
1339 return -1;
1340 }
1341
1342 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1343 {
1344 int8_t *noise = arg;
1345 struct nlattr **tb = nl80211_parse(msg);
1346 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1347
1348 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1349 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1350 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1351 };
1352
1353 if (!tb[NL80211_ATTR_SURVEY_INFO])
1354 return NL_SKIP;
1355
1356 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1357 tb[NL80211_ATTR_SURVEY_INFO], sp))
1358 return NL_SKIP;
1359
1360 if (!si[NL80211_SURVEY_INFO_NOISE])
1361 return NL_SKIP;
1362
1363 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1364 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1365
1366 return NL_SKIP;
1367 }
1368
1369
1370 static int nl80211_get_noise(const char *ifname, int *buf)
1371 {
1372 int8_t noise;
1373 struct nl80211_msg_conveyor *req;
1374
1375 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1376 if (req)
1377 {
1378 noise = 0;
1379
1380 nl80211_send(req, nl80211_get_noise_cb, &noise);
1381 nl80211_free(req);
1382
1383 if (noise)
1384 {
1385 *buf = noise;
1386 return 0;
1387 }
1388 }
1389
1390 return -1;
1391 }
1392
1393 static int nl80211_get_quality(const char *ifname, int *buf)
1394 {
1395 int signal;
1396
1397 if (!nl80211_get_signal(ifname, &signal))
1398 {
1399 /* A positive signal level is usually just a quality
1400 * value, pass through as-is */
1401 if (signal >= 0)
1402 {
1403 *buf = signal;
1404 }
1405
1406 /* The cfg80211 wext compat layer assumes a signal range
1407 * of -110 dBm to -40 dBm, the quality value is derived
1408 * by adding 110 to the signal level */
1409 else
1410 {
1411 if (signal < -110)
1412 signal = -110;
1413 else if (signal > -40)
1414 signal = -40;
1415
1416 *buf = (signal + 110);
1417 }
1418
1419 return 0;
1420 }
1421
1422 return -1;
1423 }
1424
1425 static int nl80211_get_quality_max(const char *ifname, int *buf)
1426 {
1427 /* The cfg80211 wext compat layer assumes a maximum
1428 * quality of 70 */
1429 *buf = 70;
1430
1431 return 0;
1432 }
1433
1434 static int nl80211_check_wepkey(const char *key)
1435 {
1436 if (key && *key)
1437 {
1438 switch (strlen(key))
1439 {
1440 case 5:
1441 case 10:
1442 return IWINFO_CIPHER_WEP40;
1443
1444 case 13:
1445 case 26:
1446 return IWINFO_CIPHER_WEP104;
1447 }
1448 }
1449
1450 return 0;
1451 }
1452
1453 static int nl80211_get_encryption(const char *ifname, char *buf)
1454 {
1455 char wpa[2], wpa_key_mgmt[16], wpa_pairwise[16], wpa_groupwise[16];
1456 char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27];
1457
1458 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1459
1460 /* WPA supplicant */
1461 if (nl80211_wpactl_query(ifname,
1462 "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise),
1463 "group_cipher", wpa_groupwise, sizeof(wpa_groupwise),
1464 "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt)))
1465 {
1466 /* WEP */
1467 if (!strcmp(wpa_key_mgmt, "NONE"))
1468 {
1469 if (strstr(wpa_pairwise, "WEP-40"))
1470 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1471 else if (strstr(wpa_pairwise, "WEP-104"))
1472 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1473
1474 if (strstr(wpa_groupwise, "WEP-40"))
1475 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1476 else if (strstr(wpa_groupwise, "WEP-104"))
1477 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1478
1479 c->enabled = !!(c->pair_ciphers | c->group_ciphers);
1480 c->auth_suites |= IWINFO_KMGMT_NONE;
1481 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1482 }
1483
1484 /* WPA */
1485 else if (strstr(wpa_key_mgmt, "WPA"))
1486 {
1487 if (strstr(wpa_pairwise, "TKIP"))
1488 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1489 else if (strstr(wpa_pairwise, "CCMP"))
1490 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1491 else if (strstr(wpa_pairwise, "NONE"))
1492 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1493 else if (strstr(wpa_pairwise, "WEP-40"))
1494 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1495 else if (strstr(wpa_pairwise, "WEP-104"))
1496 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1497
1498 if (strstr(wpa_groupwise, "TKIP"))
1499 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1500 else if (strstr(wpa_groupwise, "CCMP"))
1501 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1502 else if (strstr(wpa_groupwise, "NONE"))
1503 c->group_ciphers |= IWINFO_CIPHER_NONE;
1504 else if (strstr(wpa_groupwise, "WEP-40"))
1505 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1506 else if (strstr(wpa_groupwise, "WEP-104"))
1507 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1508
1509 if (strstr(wpa_key_mgmt, "WPA2"))
1510 c->wpa_version = 2;
1511 else if (strstr(wpa_key_mgmt, "WPA"))
1512 c->wpa_version = 1;
1513
1514 if (strstr(wpa_key_mgmt, "PSK"))
1515 c->auth_suites |= IWINFO_KMGMT_PSK;
1516 else if (strstr(wpa_key_mgmt, "EAP") ||
1517 strstr(wpa_key_mgmt, "802.1X"))
1518 c->auth_suites |= IWINFO_KMGMT_8021x;
1519 else if (strstr(wpa_key_mgmt, "NONE"))
1520 c->auth_suites |= IWINFO_KMGMT_NONE;
1521
1522 c->enabled = !!(c->wpa_version && c->auth_suites);
1523 }
1524
1525 return 0;
1526 }
1527
1528 /* Hostapd */
1529 else if (nl80211_hostapd_query(ifname,
1530 "wpa", wpa, sizeof(wpa),
1531 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1532 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise),
1533 "auth_algs", auth_algs, sizeof(auth_algs),
1534 "wep_key0", wep_key0, sizeof(wep_key0),
1535 "wep_key1", wep_key1, sizeof(wep_key1),
1536 "wep_key2", wep_key2, sizeof(wep_key2),
1537 "wep_key3", wep_key3, sizeof(wep_key3)))
1538 {
1539 c->wpa_version = wpa[0] ? atoi(wpa) : 0;
1540
1541 if (wpa_key_mgmt[0])
1542 {
1543 if (strstr(wpa_key_mgmt, "PSK"))
1544 c->auth_suites |= IWINFO_KMGMT_PSK;
1545
1546 if (strstr(wpa_key_mgmt, "EAP"))
1547 c->auth_suites |= IWINFO_KMGMT_8021x;
1548
1549 if (strstr(wpa_key_mgmt, "NONE"))
1550 c->auth_suites |= IWINFO_KMGMT_NONE;
1551 }
1552 else
1553 {
1554 c->auth_suites |= IWINFO_KMGMT_PSK;
1555 }
1556
1557 if (wpa_pairwise[0])
1558 {
1559 if (strstr(wpa_pairwise, "TKIP"))
1560 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1561
1562 if (strstr(wpa_pairwise, "CCMP"))
1563 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1564
1565 if (strstr(wpa_pairwise, "NONE"))
1566 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1567 }
1568
1569 if (auth_algs[0])
1570 {
1571 switch(atoi(auth_algs))
1572 {
1573 case 1:
1574 c->auth_algs |= IWINFO_AUTH_OPEN;
1575 break;
1576
1577 case 2:
1578 c->auth_algs |= IWINFO_AUTH_SHARED;
1579 break;
1580
1581 case 3:
1582 c->auth_algs |= IWINFO_AUTH_OPEN;
1583 c->auth_algs |= IWINFO_AUTH_SHARED;
1584 break;
1585 }
1586
1587 c->pair_ciphers |= nl80211_check_wepkey(wep_key0);
1588 c->pair_ciphers |= nl80211_check_wepkey(wep_key1);
1589 c->pair_ciphers |= nl80211_check_wepkey(wep_key2);
1590 c->pair_ciphers |= nl80211_check_wepkey(wep_key3);
1591 }
1592
1593 c->group_ciphers = c->pair_ciphers;
1594 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1595
1596 return 0;
1597 }
1598
1599 return -1;
1600 }
1601
1602 static int nl80211_get_phyname(const char *ifname, char *buf)
1603 {
1604 const char *name;
1605
1606 name = nl80211_ifname2phy(ifname);
1607
1608 if (name)
1609 {
1610 strcpy(buf, name);
1611 return 0;
1612 }
1613 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1614 {
1615 name = nl80211_ifname2phy(name);
1616
1617 if (name)
1618 {
1619 strcpy(buf, ifname);
1620 return 0;
1621 }
1622 }
1623
1624 return -1;
1625 }
1626
1627
1628 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1629 {
1630 struct nl80211_array_buf *arr = arg;
1631 struct iwinfo_assoclist_entry *e = arr->buf;
1632 struct nlattr **attr = nl80211_parse(msg);
1633 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1634 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1635 struct nl80211_sta_flag_update *sta_flags;
1636
1637 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1638 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1639 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1640 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1641 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1642 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1643 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1644 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1645 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1646 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 },
1647 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
1648 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 },
1649 [NL80211_STA_INFO_STA_FLAGS] =
1650 { .minlen = sizeof(struct nl80211_sta_flag_update) },
1651 };
1652
1653 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1654 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1655 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1656 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1657 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1658 };
1659
1660 /* advance to end of array */
1661 e += arr->count;
1662 memset(e, 0, sizeof(*e));
1663
1664 if (attr[NL80211_ATTR_MAC])
1665 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1666
1667 if (attr[NL80211_ATTR_STA_INFO] &&
1668 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1669 attr[NL80211_ATTR_STA_INFO], stats_policy))
1670 {
1671 if (sinfo[NL80211_STA_INFO_SIGNAL])
1672 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1673
1674 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1675 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1676
1677 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1678 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1679
1680 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1681 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1682
1683 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1684 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1685 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1686 {
1687 if (rinfo[NL80211_RATE_INFO_BITRATE])
1688 e->rx_rate.rate =
1689 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1690
1691 if (rinfo[NL80211_RATE_INFO_MCS])
1692 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1693
1694 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1695 e->rx_rate.is_40mhz = 1;
1696
1697 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1698 e->rx_rate.is_short_gi = 1;
1699 }
1700
1701 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1702 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1703 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1704 {
1705 if (rinfo[NL80211_RATE_INFO_BITRATE])
1706 e->tx_rate.rate =
1707 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1708
1709 if (rinfo[NL80211_RATE_INFO_MCS])
1710 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1711
1712 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1713 e->tx_rate.is_40mhz = 1;
1714
1715 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1716 e->tx_rate.is_short_gi = 1;
1717 }
1718
1719 if (sinfo[NL80211_STA_INFO_RX_BYTES])
1720 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
1721
1722 if (sinfo[NL80211_STA_INFO_TX_BYTES])
1723 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
1724
1725 if (sinfo[NL80211_STA_INFO_TX_RETRIES])
1726 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
1727
1728 if (sinfo[NL80211_STA_INFO_TX_FAILED])
1729 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
1730
1731 if (sinfo[NL80211_STA_INFO_T_OFFSET])
1732 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]);
1733
1734 /* Station flags */
1735 if (sinfo[NL80211_STA_INFO_STA_FLAGS])
1736 {
1737 sta_flags = (struct nl80211_sta_flag_update *)
1738 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
1739
1740 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
1741 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
1742 e->is_authorized = 1;
1743
1744 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
1745 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1746 e->is_authenticated = 1;
1747
1748 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
1749 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1750 e->is_preamble_short = 1;
1751
1752 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
1753 sta_flags->set & BIT(NL80211_STA_FLAG_WME))
1754 e->is_wme = 1;
1755
1756 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
1757 sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
1758 e->is_mfp = 1;
1759
1760 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
1761 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1762 e->is_tdls = 1;
1763 }
1764 }
1765
1766 e->noise = 0; /* filled in by caller */
1767 arr->count++;
1768
1769 return NL_SKIP;
1770 }
1771
1772 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1773 {
1774 DIR *d;
1775 int i, noise = 0;
1776 struct dirent *de;
1777 struct nl80211_msg_conveyor *req;
1778 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1779 struct iwinfo_assoclist_entry *e;
1780
1781 if ((d = opendir("/sys/class/net")) != NULL)
1782 {
1783 while ((de = readdir(d)) != NULL)
1784 {
1785 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1786 (!de->d_name[strlen(ifname)] ||
1787 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1788 {
1789 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1790 NLM_F_DUMP);
1791
1792 if (req)
1793 {
1794 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1795 nl80211_free(req);
1796 }
1797 }
1798 }
1799
1800 closedir(d);
1801
1802 if (!nl80211_get_noise(ifname, &noise))
1803 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1804 e->noise = noise;
1805
1806 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1807 return 0;
1808 }
1809
1810 return -1;
1811 }
1812
1813 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1814 {
1815 int *dbm_max = arg;
1816 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1817
1818 struct nlattr **attr = nl80211_parse(msg);
1819 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1820 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1821 struct nlattr *band, *freq;
1822
1823 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1824 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1825 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1826 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1827 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1828 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1829 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1830 };
1831
1832 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1833 *dbm_max = -1;
1834
1835 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1836 {
1837 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1838 nla_len(band), NULL);
1839
1840 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1841 {
1842 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1843 nla_data(freq), nla_len(freq), freq_policy);
1844
1845 ch_cmp = nl80211_freq2channel(nla_get_u32(
1846 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1847
1848 if ((!ch_cur || (ch_cmp == ch_cur)) &&
1849 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1850 {
1851 *dbm_max = (int)(0.01 * nla_get_u32(
1852 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1853
1854 break;
1855 }
1856 }
1857 }
1858
1859 return NL_SKIP;
1860 }
1861
1862 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1863 {
1864 int ch_cur;
1865 int dbm_max = -1, dbm_cur, dbm_cnt;
1866 struct nl80211_msg_conveyor *req;
1867 struct iwinfo_txpwrlist_entry entry;
1868
1869 if (nl80211_get_channel(ifname, &ch_cur))
1870 ch_cur = 0;
1871
1872 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1873 if (req)
1874 {
1875 /* initialize the value pointer with channel for callback */
1876 dbm_max = ch_cur;
1877
1878 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1879 nl80211_free(req);
1880 }
1881
1882 if (dbm_max > 0)
1883 {
1884 for (dbm_cur = 0, dbm_cnt = 0;
1885 dbm_cur < dbm_max;
1886 dbm_cur++, dbm_cnt++)
1887 {
1888 entry.dbm = dbm_cur;
1889 entry.mw = iwinfo_dbm2mw(dbm_cur);
1890
1891 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1892 }
1893
1894 entry.dbm = dbm_max;
1895 entry.mw = iwinfo_dbm2mw(dbm_max);
1896
1897 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1898 dbm_cnt++;
1899
1900 *len = dbm_cnt * sizeof(entry);
1901 return 0;
1902 }
1903
1904 return -1;
1905 }
1906
1907 static void nl80211_get_scancrypto(const char *spec,
1908 struct iwinfo_crypto_entry *c)
1909 {
1910 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1911 {
1912 c->enabled = 1;
1913
1914 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1915 c->wpa_version = 3;
1916
1917 else if (strstr(spec, "WPA2"))
1918 c->wpa_version = 2;
1919
1920 else if (strstr(spec, "WPA"))
1921 c->wpa_version = 1;
1922
1923 else if (strstr(spec, "WEP"))
1924 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1925
1926
1927 if (strstr(spec, "PSK"))
1928 c->auth_suites |= IWINFO_KMGMT_PSK;
1929
1930 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1931 c->auth_suites |= IWINFO_KMGMT_8021x;
1932
1933 if (strstr(spec, "WPA-NONE"))
1934 c->auth_suites |= IWINFO_KMGMT_NONE;
1935
1936
1937 if (strstr(spec, "TKIP"))
1938 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1939
1940 if (strstr(spec, "CCMP"))
1941 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1942
1943 if (strstr(spec, "WEP-40"))
1944 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1945
1946 if (strstr(spec, "WEP-104"))
1947 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1948
1949 c->group_ciphers = c->pair_ciphers;
1950 }
1951 else
1952 {
1953 c->enabled = 0;
1954 }
1955 }
1956
1957
1958 struct nl80211_scanlist {
1959 struct iwinfo_scanlist_entry *e;
1960 int len;
1961 };
1962
1963
1964 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1965 struct iwinfo_scanlist_entry *e)
1966 {
1967 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1968 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1969 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1970 int len;
1971
1972 while (ielen >= 2 && ielen >= ie[1])
1973 {
1974 switch (ie[0])
1975 {
1976 case 0: /* SSID */
1977 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
1978 memcpy(e->ssid, ie + 2, len);
1979 e->ssid[len] = 0;
1980 break;
1981
1982 case 48: /* RSN */
1983 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1984 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1985 break;
1986
1987 case 221: /* Vendor */
1988 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1989 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1990 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1991 break;
1992 }
1993
1994 ielen -= ie[1] + 2;
1995 ie += ie[1] + 2;
1996 }
1997 }
1998
1999 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
2000 {
2001 int8_t rssi;
2002 uint16_t caps;
2003
2004 struct nl80211_scanlist *sl = arg;
2005 struct nlattr **tb = nl80211_parse(msg);
2006 struct nlattr *bss[NL80211_BSS_MAX + 1];
2007
2008 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2009 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2010 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2011 [NL80211_BSS_BSSID] = { 0 },
2012 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2013 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2014 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
2015 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2016 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2017 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2018 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2019 [NL80211_BSS_BEACON_IES] = { 0 },
2020 };
2021
2022 if (!tb[NL80211_ATTR_BSS] ||
2023 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2024 bss_policy) ||
2025 !bss[NL80211_BSS_BSSID])
2026 {
2027 return NL_SKIP;
2028 }
2029
2030 if (bss[NL80211_BSS_CAPABILITY])
2031 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2032 else
2033 caps = 0;
2034
2035 memset(sl->e, 0, sizeof(*sl->e));
2036 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
2037
2038 if (caps & (1<<1))
2039 sl->e->mode = IWINFO_OPMODE_ADHOC;
2040 else if (caps & (1<<0))
2041 sl->e->mode = IWINFO_OPMODE_MASTER;
2042 else
2043 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
2044
2045 if (caps & (1<<4))
2046 sl->e->crypto.enabled = 1;
2047
2048 if (bss[NL80211_BSS_FREQUENCY])
2049 sl->e->channel = nl80211_freq2channel(nla_get_u32(
2050 bss[NL80211_BSS_FREQUENCY]));
2051
2052 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
2053 nl80211_get_scanlist_ie(bss, sl->e);
2054
2055 if (bss[NL80211_BSS_SIGNAL_MBM])
2056 {
2057 sl->e->signal =
2058 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
2059
2060 rssi = sl->e->signal - 0x100;
2061
2062 if (rssi < -110)
2063 rssi = -110;
2064 else if (rssi > -40)
2065 rssi = -40;
2066
2067 sl->e->quality = (rssi + 110);
2068 sl->e->quality_max = 70;
2069 }
2070
2071 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
2072 {
2073 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2074 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2075 }
2076
2077 sl->e++;
2078 sl->len++;
2079
2080 return NL_SKIP;
2081 }
2082
2083 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
2084 {
2085 struct nl80211_msg_conveyor *req;
2086 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
2087
2088 req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
2089 if (req)
2090 {
2091 nl80211_send(req, NULL, NULL);
2092 nl80211_free(req);
2093 }
2094
2095 nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
2096
2097 req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
2098 if (req)
2099 {
2100 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
2101 nl80211_free(req);
2102 }
2103
2104 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
2105 return *len ? 0 : -1;
2106 }
2107
2108 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
2109 {
2110 #define hex(x) \
2111 (((x) >= 'a') ? ((x) - 'a' + 10) : \
2112 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0')))
2113
2114 int len = 0;
2115
2116 while (*in)
2117 {
2118 if (len + 1 >= outlen)
2119 break;
2120
2121 switch (*in)
2122 {
2123 case '\\':
2124 in++;
2125 switch (*in)
2126 {
2127 case 'n':
2128 out[len++] = '\n'; in++;
2129 break;
2130
2131 case 'r':
2132 out[len++] = '\r'; in++;
2133 break;
2134
2135 case 't':
2136 out[len++] = '\t'; in++;
2137 break;
2138
2139 case 'e':
2140 out[len++] = '\033'; in++;
2141 break;
2142
2143 case 'x':
2144 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
2145 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
2146 in += 3;
2147 break;
2148
2149 default:
2150 out[len++] = *in++;
2151 break;
2152 }
2153 break;
2154
2155 default:
2156 out[len++] = *in++;
2157 break;
2158 }
2159 }
2160
2161 if (outlen > len)
2162 out[len] = '\0';
2163
2164 return len;
2165 }
2166
2167 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len)
2168 {
2169 int sock, qmax, rssi, tries, count = -1, ready = 0;
2170 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096];
2171 struct sockaddr_un local = { 0 };
2172 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
2173
2174 sock = nl80211_wpactl_connect(ifname, &local);
2175
2176 if (sock < 0)
2177 return sock;
2178
2179 send(sock, "ATTACH", 6, 0);
2180 send(sock, "SCAN", 4, 0);
2181
2182 /*
2183 * wait for scan results:
2184 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan
2185 * 72 channels at most. We'll also receive two "OK" messages acknowledging
2186 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra
2187 * time to process the results, so try 72 + 2 + 1 times.
2188 */
2189 for (tries = 0; tries < 75; tries++)
2190 {
2191 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0)
2192 continue;
2193
2194 /* got an event notification */
2195 if (reply[0] == '<')
2196 {
2197 /* scan results are ready */
2198 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS"))
2199 {
2200 /* send "SCAN_RESULTS" command */
2201 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12);
2202 break;
2203 }
2204
2205 /* is another unrelated event, retry */
2206 tries--;
2207 }
2208 }
2209
2210 /* receive and parse scan results if the wait above didn't time out */
2211 if (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
2212 {
2213 nl80211_get_quality_max(ifname, &qmax);
2214
2215 for (line = strtok_r(reply, "\n", &pos);
2216 line != NULL;
2217 line = strtok_r(NULL, "\n", &pos))
2218 {
2219 /* skip header line */
2220 if (count < 0)
2221 {
2222 count++;
2223 continue;
2224 }
2225
2226 bssid = strtok(line, "\t");
2227 freq = strtok(NULL, "\t");
2228 signal = strtok(NULL, "\t");
2229 flags = strtok(NULL, "\t");
2230 ssid = strtok(NULL, "\n");
2231
2232 if (!bssid || !freq || !signal || !flags || !ssid)
2233 continue;
2234
2235 /* BSSID */
2236 e->mac[0] = strtol(&bssid[0], NULL, 16);
2237 e->mac[1] = strtol(&bssid[3], NULL, 16);
2238 e->mac[2] = strtol(&bssid[6], NULL, 16);
2239 e->mac[3] = strtol(&bssid[9], NULL, 16);
2240 e->mac[4] = strtol(&bssid[12], NULL, 16);
2241 e->mac[5] = strtol(&bssid[15], NULL, 16);
2242
2243 /* SSID */
2244 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2245
2246 /* Mode */
2247 if (strstr(flags, "[MESH]"))
2248 e->mode = IWINFO_OPMODE_MESHPOINT;
2249 else if (strstr(flags, "[IBSS]"))
2250 e->mode = IWINFO_OPMODE_ADHOC;
2251 else
2252 e->mode = IWINFO_OPMODE_MASTER;
2253
2254 /* Channel */
2255 e->channel = nl80211_freq2channel(atoi(freq));
2256
2257 /* Signal */
2258 rssi = atoi(signal);
2259 e->signal = rssi;
2260
2261 /* Quality */
2262 if (rssi < 0)
2263 {
2264 /* The cfg80211 wext compat layer assumes a signal range
2265 * of -110 dBm to -40 dBm, the quality value is derived
2266 * by adding 110 to the signal level */
2267 if (rssi < -110)
2268 rssi = -110;
2269 else if (rssi > -40)
2270 rssi = -40;
2271
2272 e->quality = (rssi + 110);
2273 }
2274 else
2275 {
2276 e->quality = rssi;
2277 }
2278
2279 /* Max. Quality */
2280 e->quality_max = qmax;
2281
2282 /* Crypto */
2283 nl80211_get_scancrypto(flags, &e->crypto);
2284
2285 count++;
2286 e++;
2287 }
2288
2289 *len = count * sizeof(struct iwinfo_scanlist_entry);
2290 }
2291
2292 close(sock);
2293 unlink(local.sun_path);
2294
2295 return (count >= 0) ? 0 : -1;
2296 }
2297
2298 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
2299 {
2300 char *res;
2301 int rv, mode;
2302
2303 *len = 0;
2304
2305 /* Got a radioX pseudo interface, find some interface on it or create one */
2306 if (!strncmp(ifname, "radio", 5))
2307 {
2308 /* Reuse existing interface */
2309 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2310 {
2311 return nl80211_get_scanlist(res, buf, len);
2312 }
2313
2314 /* Need to spawn a temporary iface for scanning */
2315 else if ((res = nl80211_ifadd(ifname)) != NULL)
2316 {
2317 rv = nl80211_get_scanlist(res, buf, len);
2318 nl80211_ifdel(res);
2319 return rv;
2320 }
2321 }
2322
2323 /* WPA supplicant */
2324 if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
2325 {
2326 return 0;
2327 }
2328
2329 /* station / ad-hoc / monitor scan */
2330 else if (!nl80211_get_mode(ifname, &mode) &&
2331 (mode == IWINFO_OPMODE_ADHOC ||
2332 mode == IWINFO_OPMODE_MASTER ||
2333 mode == IWINFO_OPMODE_CLIENT ||
2334 mode == IWINFO_OPMODE_MONITOR) &&
2335 iwinfo_ifup(ifname))
2336 {
2337 return nl80211_get_scanlist_nl(ifname, buf, len);
2338 }
2339
2340 /* AP scan */
2341 else
2342 {
2343 /* Got a temp interface, don't create yet another one */
2344 if (!strncmp(ifname, "tmp.", 4))
2345 {
2346 if (!iwinfo_ifup(ifname))
2347 return -1;
2348
2349 rv = nl80211_get_scanlist_nl(ifname, buf, len);
2350 iwinfo_ifdown(ifname);
2351 return rv;
2352 }
2353
2354 /* Spawn a new scan interface */
2355 else
2356 {
2357 if (!(res = nl80211_ifadd(ifname)))
2358 return -1;
2359
2360 iwinfo_ifmac(res);
2361
2362 /* if we can take the new interface up, the driver supports an
2363 * additional interface and there's no need to tear down the ap */
2364 if (iwinfo_ifup(res))
2365 {
2366 rv = nl80211_get_scanlist_nl(res, buf, len);
2367 iwinfo_ifdown(res);
2368 }
2369
2370 /* driver cannot create secondary interface, take down ap
2371 * during scan */
2372 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2373 {
2374 rv = nl80211_get_scanlist_nl(res, buf, len);
2375 iwinfo_ifdown(res);
2376 iwinfo_ifup(ifname);
2377 nl80211_hostapd_hup(ifname);
2378 }
2379
2380 nl80211_ifdel(res);
2381 return rv;
2382 }
2383 }
2384
2385 return -1;
2386 }
2387
2388 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2389 {
2390 int bands_remain, freqs_remain;
2391
2392 struct nl80211_array_buf *arr = arg;
2393 struct iwinfo_freqlist_entry *e = arr->buf;
2394
2395 struct nlattr **attr = nl80211_parse(msg);
2396 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2397 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2398 struct nlattr *band, *freq;
2399
2400 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2401 {
2402 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2403 nla_data(band), nla_len(band), NULL);
2404
2405 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2406 {
2407 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2408 nla_data(freq), nla_len(freq), NULL);
2409
2410 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2411 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2412 continue;
2413
2414 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2415 e->channel = nl80211_freq2channel(e->mhz);
2416
2417 e->restricted = (
2418 freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
2419 !freqs[NL80211_FREQUENCY_ATTR_RADAR]
2420 ) ? 1 : 0;
2421
2422 e++;
2423 arr->count++;
2424 }
2425 }
2426
2427 return NL_SKIP;
2428 }
2429
2430 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2431 {
2432 struct nl80211_msg_conveyor *req;
2433 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2434
2435 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2436 if (req)
2437 {
2438 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2439 nl80211_free(req);
2440 }
2441
2442 if (arr.count > 0)
2443 {
2444 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2445 return 0;
2446 }
2447
2448 return -1;
2449 }
2450
2451 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2452 {
2453 char *buf = arg;
2454 struct nlattr **attr = nl80211_parse(msg);
2455
2456 if (attr[NL80211_ATTR_REG_ALPHA2])
2457 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2458 else
2459 buf[0] = 0;
2460
2461 return NL_SKIP;
2462 }
2463
2464 static int nl80211_get_country(const char *ifname, char *buf)
2465 {
2466 int rv = -1;
2467 struct nl80211_msg_conveyor *req;
2468
2469 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2470 if (req)
2471 {
2472 nl80211_send(req, nl80211_get_country_cb, buf);
2473 nl80211_free(req);
2474
2475 if (buf[0])
2476 rv = 0;
2477 }
2478
2479 return rv;
2480 }
2481
2482 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2483 {
2484 int count;
2485 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2486 const struct iwinfo_iso3166_label *l;
2487
2488 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2489 {
2490 e->iso3166 = l->iso3166;
2491 e->ccode[0] = (l->iso3166 / 256);
2492 e->ccode[1] = (l->iso3166 % 256);
2493 e->ccode[2] = 0;
2494 }
2495
2496 *len = (count * sizeof(struct iwinfo_country_entry));
2497 return 0;
2498 }
2499
2500
2501 struct nl80211_modes
2502 {
2503 bool ok;
2504 uint32_t hw;
2505 uint32_t ht;
2506 };
2507
2508 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
2509 {
2510 struct nl80211_modes *m = arg;
2511 int bands_remain, freqs_remain;
2512 uint16_t caps = 0;
2513 uint32_t vht_caps = 0;
2514 struct nlattr **attr = nl80211_parse(msg);
2515 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2516 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2517 struct nlattr *band, *freq;
2518
2519 if (attr[NL80211_ATTR_WIPHY_BANDS])
2520 {
2521 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2522 {
2523 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2524 nla_data(band), nla_len(band), NULL);
2525
2526 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2527 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2528
2529 /* Treat any nonzero capability as 11n */
2530 if (caps > 0)
2531 {
2532 m->hw |= IWINFO_80211_N;
2533 m->ht |= IWINFO_HTMODE_HT20;
2534
2535 if (caps & (1 << 1))
2536 m->ht |= IWINFO_HTMODE_HT40;
2537 }
2538
2539 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2540 freqs_remain)
2541 {
2542 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2543 nla_data(freq), nla_len(freq), NULL);
2544
2545 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2546 continue;
2547
2548 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2549 {
2550 m->hw |= IWINFO_80211_B;
2551 m->hw |= IWINFO_80211_G;
2552 }
2553 else if (bands[NL80211_BAND_ATTR_VHT_CAPA])
2554 {
2555 vht_caps = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
2556
2557 /* Treat any nonzero capability as 11ac */
2558 if (vht_caps > 0)
2559 {
2560 m->hw |= IWINFO_80211_AC;
2561 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
2562
2563 switch ((vht_caps >> 2) & 3)
2564 {
2565 case 2:
2566 m->ht |= IWINFO_HTMODE_VHT80_80;
2567 /* fall through */
2568
2569 case 1:
2570 m->ht |= IWINFO_HTMODE_VHT160;
2571 }
2572 }
2573 }
2574 else if (!(m->hw & IWINFO_80211_AC))
2575 {
2576 m->hw |= IWINFO_80211_A;
2577 }
2578 }
2579 }
2580
2581 m->ok = 1;
2582 }
2583
2584 return NL_SKIP;
2585 }
2586
2587 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
2588 {
2589 struct nl80211_msg_conveyor *req;
2590 struct nl80211_modes m = { 0 };
2591
2592 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2593 if (req)
2594 {
2595 nl80211_send(req, nl80211_get_modelist_cb, &m);
2596 nl80211_free(req);
2597 }
2598
2599 if (m.ok)
2600 {
2601 *buf = m.hw;
2602 return 0;
2603 }
2604
2605 return -1;
2606 }
2607
2608 static int nl80211_get_htmodelist(const char *ifname, int *buf)
2609 {
2610 struct nl80211_msg_conveyor *req;
2611 struct nl80211_modes m = { 0 };
2612
2613 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2614 if (req)
2615 {
2616 nl80211_send(req, nl80211_get_modelist_cb, &m);
2617 nl80211_free(req);
2618 }
2619
2620 if (m.ok)
2621 {
2622 *buf = m.ht;
2623 return 0;
2624 }
2625
2626 return -1;
2627 }
2628
2629
2630 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
2631 {
2632 struct nlattr **attr = nl80211_parse(msg);
2633 struct nlattr *comb;
2634 int *ret = arg;
2635 int comb_rem, limit_rem, mode_rem;
2636
2637 *ret = 0;
2638 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
2639 return NL_SKIP;
2640
2641 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
2642 {
2643 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
2644 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
2645 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
2646 };
2647 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1];
2648 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
2649 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
2650 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
2651 };
2652 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1];
2653 struct nlattr *limit;
2654
2655 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy);
2656
2657 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
2658 continue;
2659
2660 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
2661 {
2662 struct nlattr *mode;
2663
2664 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
2665
2666 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
2667 !tb_limit[NL80211_IFACE_LIMIT_MAX])
2668 continue;
2669
2670 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
2671 continue;
2672
2673 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
2674 if (nla_type(mode) == NL80211_IFTYPE_AP)
2675 *ret = 1;
2676 }
2677 }
2678 }
2679
2680 return NL_SKIP;
2681 }
2682
2683 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
2684 {
2685 struct nl80211_msg_conveyor *req;
2686
2687 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2688 if (!req)
2689 return -1;
2690
2691 nl80211_send(req, nl80211_get_ifcomb_cb, buf);
2692 nl80211_free(req);
2693 return 0;
2694 }
2695
2696 static int nl80211_get_hardware_id(const char *ifname, char *buf)
2697 {
2698 int rv = -1;
2699 char *res;
2700
2701 /* Got a radioX pseudo interface, find some interface on it or create one */
2702 if (!strncmp(ifname, "radio", 5))
2703 {
2704 /* Reuse existing interface */
2705 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2706 {
2707 rv = wext_ops.hardware_id(res, buf);
2708 }
2709
2710 /* Need to spawn a temporary iface for finding IDs */
2711 else if ((res = nl80211_ifadd(ifname)) != NULL)
2712 {
2713 rv = wext_ops.hardware_id(res, buf);
2714 nl80211_ifdel(res);
2715 }
2716 }
2717 else
2718 {
2719 rv = wext_ops.hardware_id(ifname, buf);
2720 }
2721
2722 /* Failed to obtain hardware IDs, search board config */
2723 if (rv)
2724 {
2725 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2726 }
2727
2728 return rv;
2729 }
2730
2731 static const struct iwinfo_hardware_entry *
2732 nl80211_get_hardware_entry(const char *ifname)
2733 {
2734 struct iwinfo_hardware_id id;
2735
2736 if (nl80211_get_hardware_id(ifname, (char *)&id))
2737 return NULL;
2738
2739 return iwinfo_hardware(&id);
2740 }
2741
2742 static int nl80211_get_hardware_name(const char *ifname, char *buf)
2743 {
2744 const struct iwinfo_hardware_entry *hw;
2745
2746 if (!(hw = nl80211_get_hardware_entry(ifname)))
2747 sprintf(buf, "Generic MAC80211");
2748 else
2749 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2750
2751 return 0;
2752 }
2753
2754 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
2755 {
2756 const struct iwinfo_hardware_entry *hw;
2757
2758 if (!(hw = nl80211_get_hardware_entry(ifname)))
2759 return -1;
2760
2761 *buf = hw->txpower_offset;
2762 return 0;
2763 }
2764
2765 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
2766 {
2767 const struct iwinfo_hardware_entry *hw;
2768
2769 if (!(hw = nl80211_get_hardware_entry(ifname)))
2770 return -1;
2771
2772 *buf = hw->frequency_offset;
2773 return 0;
2774 }
2775
2776 static int nl80211_lookup_phyname(const char *section, char *buf)
2777 {
2778 int idx;
2779
2780 if ((idx = nl80211_phy_idx_from_uci(section)) < 0)
2781 return -1;
2782
2783 sprintf(buf, "phy%d", idx);
2784 return 0;
2785 }
2786
2787 const struct iwinfo_ops nl80211_ops = {
2788 .name = "nl80211",
2789 .probe = nl80211_probe,
2790 .channel = nl80211_get_channel,
2791 .frequency = nl80211_get_frequency,
2792 .frequency_offset = nl80211_get_frequency_offset,
2793 .txpower = nl80211_get_txpower,
2794 .txpower_offset = nl80211_get_txpower_offset,
2795 .bitrate = nl80211_get_bitrate,
2796 .signal = nl80211_get_signal,
2797 .noise = nl80211_get_noise,
2798 .quality = nl80211_get_quality,
2799 .quality_max = nl80211_get_quality_max,
2800 .mbssid_support = nl80211_get_mbssid_support,
2801 .hwmodelist = nl80211_get_hwmodelist,
2802 .htmodelist = nl80211_get_htmodelist,
2803 .mode = nl80211_get_mode,
2804 .ssid = nl80211_get_ssid,
2805 .bssid = nl80211_get_bssid,
2806 .country = nl80211_get_country,
2807 .hardware_id = nl80211_get_hardware_id,
2808 .hardware_name = nl80211_get_hardware_name,
2809 .encryption = nl80211_get_encryption,
2810 .phyname = nl80211_get_phyname,
2811 .assoclist = nl80211_get_assoclist,
2812 .txpwrlist = nl80211_get_txpwrlist,
2813 .scanlist = nl80211_get_scanlist,
2814 .freqlist = nl80211_get_freqlist,
2815 .countrylist = nl80211_get_countrylist,
2816 .lookup_phy = nl80211_lookup_phyname,
2817 .close = nl80211_close
2818 };
Library for accessing wireless device drivers