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iwinfo: report additional data for stations
[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
1192 static int nl80211_get_txpower(const char *ifname, int *buf)
1193 {
1194 #if 0
1195 char *res;
1196 char path[PATH_MAX];
1197
1198 res = nl80211_ifname2phy(ifname);
1199 snprintf(path, sizeof(path), "/sys/kernel/debug/ieee80211/%s/power",
1200 res ? res : ifname);
1201
1202 if ((*buf = nl80211_readint(path)) > -1)
1203 return 0;
1204 #endif
1205
1206 return wext_ops.txpower(ifname, buf);
1207 }
1208
1209
1210 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1211 {
1212 int8_t dbm;
1213 int16_t mbit;
1214 struct nl80211_rssi_rate *rr = arg;
1215 struct nlattr **attr = nl80211_parse(msg);
1216 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1217 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1218
1219 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1220 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1221 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1222 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1223 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1224 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1225 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1226 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1227 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1228 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1229 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1230 };
1231
1232 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1233 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1234 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1235 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1236 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1237 };
1238
1239 if (attr[NL80211_ATTR_STA_INFO])
1240 {
1241 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1242 attr[NL80211_ATTR_STA_INFO], stats_policy))
1243 {
1244 if (sinfo[NL80211_STA_INFO_SIGNAL])
1245 {
1246 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1247 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1248 }
1249
1250 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1251 {
1252 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1253 sinfo[NL80211_STA_INFO_TX_BITRATE],
1254 rate_policy))
1255 {
1256 if (rinfo[NL80211_RATE_INFO_BITRATE])
1257 {
1258 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1259 rr->rate = rr->rate
1260 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1261 }
1262 }
1263 }
1264 }
1265 }
1266
1267 return NL_SKIP;
1268 }
1269
1270 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1271 {
1272 DIR *d;
1273 struct dirent *de;
1274 struct nl80211_msg_conveyor *req;
1275
1276 r->rssi = 0;
1277 r->rate = 0;
1278
1279 if ((d = opendir("/sys/class/net")) != NULL)
1280 {
1281 while ((de = readdir(d)) != NULL)
1282 {
1283 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1284 (!de->d_name[strlen(ifname)] ||
1285 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1286 {
1287 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1288 NLM_F_DUMP);
1289
1290 if (req)
1291 {
1292 nl80211_send(req, nl80211_fill_signal_cb, r);
1293 nl80211_free(req);
1294 }
1295 }
1296 }
1297
1298 closedir(d);
1299 }
1300 }
1301
1302 static int nl80211_get_bitrate(const char *ifname, int *buf)
1303 {
1304 struct nl80211_rssi_rate rr;
1305
1306 nl80211_fill_signal(ifname, &rr);
1307
1308 if (rr.rate)
1309 {
1310 *buf = (rr.rate * 100);
1311 return 0;
1312 }
1313
1314 return -1;
1315 }
1316
1317 static int nl80211_get_signal(const char *ifname, int *buf)
1318 {
1319 struct nl80211_rssi_rate rr;
1320
1321 nl80211_fill_signal(ifname, &rr);
1322
1323 if (rr.rssi)
1324 {
1325 *buf = rr.rssi;
1326 return 0;
1327 }
1328
1329 return -1;
1330 }
1331
1332 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1333 {
1334 int8_t *noise = arg;
1335 struct nlattr **tb = nl80211_parse(msg);
1336 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1337
1338 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1339 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1340 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1341 };
1342
1343 if (!tb[NL80211_ATTR_SURVEY_INFO])
1344 return NL_SKIP;
1345
1346 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1347 tb[NL80211_ATTR_SURVEY_INFO], sp))
1348 return NL_SKIP;
1349
1350 if (!si[NL80211_SURVEY_INFO_NOISE])
1351 return NL_SKIP;
1352
1353 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1354 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1355
1356 return NL_SKIP;
1357 }
1358
1359
1360 static int nl80211_get_noise(const char *ifname, int *buf)
1361 {
1362 int8_t noise;
1363 struct nl80211_msg_conveyor *req;
1364
1365 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1366 if (req)
1367 {
1368 noise = 0;
1369
1370 nl80211_send(req, nl80211_get_noise_cb, &noise);
1371 nl80211_free(req);
1372
1373 if (noise)
1374 {
1375 *buf = noise;
1376 return 0;
1377 }
1378 }
1379
1380 return -1;
1381 }
1382
1383 static int nl80211_get_quality(const char *ifname, int *buf)
1384 {
1385 int signal;
1386
1387 if (!nl80211_get_signal(ifname, &signal))
1388 {
1389 /* A positive signal level is usually just a quality
1390 * value, pass through as-is */
1391 if (signal >= 0)
1392 {
1393 *buf = signal;
1394 }
1395
1396 /* The cfg80211 wext compat layer assumes a signal range
1397 * of -110 dBm to -40 dBm, the quality value is derived
1398 * by adding 110 to the signal level */
1399 else
1400 {
1401 if (signal < -110)
1402 signal = -110;
1403 else if (signal > -40)
1404 signal = -40;
1405
1406 *buf = (signal + 110);
1407 }
1408
1409 return 0;
1410 }
1411
1412 return -1;
1413 }
1414
1415 static int nl80211_get_quality_max(const char *ifname, int *buf)
1416 {
1417 /* The cfg80211 wext compat layer assumes a maximum
1418 * quality of 70 */
1419 *buf = 70;
1420
1421 return 0;
1422 }
1423
1424 static int nl80211_check_wepkey(const char *key)
1425 {
1426 if (key && *key)
1427 {
1428 switch (strlen(key))
1429 {
1430 case 5:
1431 case 10:
1432 return IWINFO_CIPHER_WEP40;
1433
1434 case 13:
1435 case 26:
1436 return IWINFO_CIPHER_WEP104;
1437 }
1438 }
1439
1440 return 0;
1441 }
1442
1443 static int nl80211_get_encryption(const char *ifname, char *buf)
1444 {
1445 char wpa[2], wpa_key_mgmt[16], wpa_pairwise[16], wpa_groupwise[16];
1446 char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27];
1447
1448 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1449
1450 /* WPA supplicant */
1451 if (nl80211_wpactl_query(ifname,
1452 "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise),
1453 "group_cipher", wpa_groupwise, sizeof(wpa_groupwise),
1454 "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt)))
1455 {
1456 /* WEP */
1457 if (!strcmp(wpa_key_mgmt, "NONE"))
1458 {
1459 if (strstr(wpa_pairwise, "WEP-40"))
1460 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1461 else if (strstr(wpa_pairwise, "WEP-104"))
1462 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1463
1464 if (strstr(wpa_groupwise, "WEP-40"))
1465 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1466 else if (strstr(wpa_groupwise, "WEP-104"))
1467 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1468
1469 c->enabled = !!(c->pair_ciphers | c->group_ciphers);
1470 c->auth_suites |= IWINFO_KMGMT_NONE;
1471 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1472 }
1473
1474 /* WPA */
1475 else if (strstr(wpa_key_mgmt, "WPA"))
1476 {
1477 if (strstr(wpa_pairwise, "TKIP"))
1478 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1479 else if (strstr(wpa_pairwise, "CCMP"))
1480 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1481 else if (strstr(wpa_pairwise, "NONE"))
1482 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1483 else if (strstr(wpa_pairwise, "WEP-40"))
1484 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1485 else if (strstr(wpa_pairwise, "WEP-104"))
1486 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1487
1488 if (strstr(wpa_groupwise, "TKIP"))
1489 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1490 else if (strstr(wpa_groupwise, "CCMP"))
1491 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1492 else if (strstr(wpa_groupwise, "NONE"))
1493 c->group_ciphers |= IWINFO_CIPHER_NONE;
1494 else if (strstr(wpa_groupwise, "WEP-40"))
1495 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1496 else if (strstr(wpa_groupwise, "WEP-104"))
1497 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1498
1499 if (strstr(wpa_key_mgmt, "WPA2"))
1500 c->wpa_version = 2;
1501 else if (strstr(wpa_key_mgmt, "WPA"))
1502 c->wpa_version = 1;
1503
1504 if (strstr(wpa_key_mgmt, "PSK"))
1505 c->auth_suites |= IWINFO_KMGMT_PSK;
1506 else if (strstr(wpa_key_mgmt, "EAP") ||
1507 strstr(wpa_key_mgmt, "802.1X"))
1508 c->auth_suites |= IWINFO_KMGMT_8021x;
1509 else if (strstr(wpa_key_mgmt, "NONE"))
1510 c->auth_suites |= IWINFO_KMGMT_NONE;
1511
1512 c->enabled = !!(c->wpa_version && c->auth_suites);
1513 }
1514
1515 return 0;
1516 }
1517
1518 /* Hostapd */
1519 else if (nl80211_hostapd_query(ifname,
1520 "wpa", wpa, sizeof(wpa),
1521 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1522 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise),
1523 "auth_algs", auth_algs, sizeof(auth_algs),
1524 "wep_key0", wep_key0, sizeof(wep_key0),
1525 "wep_key1", wep_key1, sizeof(wep_key1),
1526 "wep_key2", wep_key2, sizeof(wep_key2),
1527 "wep_key3", wep_key3, sizeof(wep_key3)))
1528 {
1529 c->wpa_version = wpa[0] ? atoi(wpa) : 0;
1530
1531 if (wpa_key_mgmt[0])
1532 {
1533 if (strstr(wpa_key_mgmt, "PSK"))
1534 c->auth_suites |= IWINFO_KMGMT_PSK;
1535
1536 if (strstr(wpa_key_mgmt, "EAP"))
1537 c->auth_suites |= IWINFO_KMGMT_8021x;
1538
1539 if (strstr(wpa_key_mgmt, "NONE"))
1540 c->auth_suites |= IWINFO_KMGMT_NONE;
1541 }
1542 else
1543 {
1544 c->auth_suites |= IWINFO_KMGMT_PSK;
1545 }
1546
1547 if (wpa_pairwise[0])
1548 {
1549 if (strstr(wpa_pairwise, "TKIP"))
1550 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1551
1552 if (strstr(wpa_pairwise, "CCMP"))
1553 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1554
1555 if (strstr(wpa_pairwise, "NONE"))
1556 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1557 }
1558
1559 if (auth_algs[0])
1560 {
1561 switch(atoi(auth_algs))
1562 {
1563 case 1:
1564 c->auth_algs |= IWINFO_AUTH_OPEN;
1565 break;
1566
1567 case 2:
1568 c->auth_algs |= IWINFO_AUTH_SHARED;
1569 break;
1570
1571 case 3:
1572 c->auth_algs |= IWINFO_AUTH_OPEN;
1573 c->auth_algs |= IWINFO_AUTH_SHARED;
1574 break;
1575 }
1576
1577 c->pair_ciphers |= nl80211_check_wepkey(wep_key0);
1578 c->pair_ciphers |= nl80211_check_wepkey(wep_key1);
1579 c->pair_ciphers |= nl80211_check_wepkey(wep_key2);
1580 c->pair_ciphers |= nl80211_check_wepkey(wep_key3);
1581 }
1582
1583 c->group_ciphers = c->pair_ciphers;
1584 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1585
1586 return 0;
1587 }
1588
1589 return -1;
1590 }
1591
1592 static int nl80211_get_phyname(const char *ifname, char *buf)
1593 {
1594 const char *name;
1595
1596 name = nl80211_ifname2phy(ifname);
1597
1598 if (name)
1599 {
1600 strcpy(buf, name);
1601 return 0;
1602 }
1603 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1604 {
1605 name = nl80211_ifname2phy(name);
1606
1607 if (name)
1608 {
1609 strcpy(buf, ifname);
1610 return 0;
1611 }
1612 }
1613
1614 return -1;
1615 }
1616
1617
1618 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1619 {
1620 struct nl80211_array_buf *arr = arg;
1621 struct iwinfo_assoclist_entry *e = arr->buf;
1622 struct nlattr **attr = nl80211_parse(msg);
1623 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1624 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1625 struct nl80211_sta_flag_update *sta_flags;
1626
1627 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1628 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1629 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1630 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1631 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1632 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1633 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1634 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1635 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1636 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 },
1637 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
1638 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 },
1639 [NL80211_STA_INFO_STA_FLAGS] =
1640 { .minlen = sizeof(struct nl80211_sta_flag_update) },
1641 };
1642
1643 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1644 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1645 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1646 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1647 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1648 };
1649
1650 /* advance to end of array */
1651 e += arr->count;
1652 memset(e, 0, sizeof(*e));
1653
1654 if (attr[NL80211_ATTR_MAC])
1655 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1656
1657 if (attr[NL80211_ATTR_STA_INFO] &&
1658 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1659 attr[NL80211_ATTR_STA_INFO], stats_policy))
1660 {
1661 if (sinfo[NL80211_STA_INFO_SIGNAL])
1662 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1663
1664 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1665 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1666
1667 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1668 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1669
1670 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1671 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1672
1673 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1674 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1675 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1676 {
1677 if (rinfo[NL80211_RATE_INFO_BITRATE])
1678 e->rx_rate.rate =
1679 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1680
1681 if (rinfo[NL80211_RATE_INFO_MCS])
1682 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1683
1684 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1685 e->rx_rate.is_40mhz = 1;
1686
1687 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1688 e->rx_rate.is_short_gi = 1;
1689 }
1690
1691 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1692 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1693 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1694 {
1695 if (rinfo[NL80211_RATE_INFO_BITRATE])
1696 e->tx_rate.rate =
1697 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1698
1699 if (rinfo[NL80211_RATE_INFO_MCS])
1700 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1701
1702 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1703 e->tx_rate.is_40mhz = 1;
1704
1705 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1706 e->tx_rate.is_short_gi = 1;
1707 }
1708
1709 if (sinfo[NL80211_STA_INFO_RX_BYTES])
1710 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
1711
1712 if (sinfo[NL80211_STA_INFO_TX_BYTES])
1713 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
1714
1715 if (sinfo[NL80211_STA_INFO_TX_RETRIES])
1716 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
1717
1718 if (sinfo[NL80211_STA_INFO_TX_FAILED])
1719 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
1720
1721 if (sinfo[NL80211_STA_INFO_T_OFFSET])
1722 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]);
1723
1724 /* Station flags */
1725 if (sinfo[NL80211_STA_INFO_STA_FLAGS])
1726 {
1727 sta_flags = (struct nl80211_sta_flag_update *)
1728 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
1729
1730 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
1731 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
1732 e->is_authorized = 1;
1733
1734 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
1735 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1736 e->is_authenticated = 1;
1737
1738 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
1739 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1740 e->is_preamble_short = 1;
1741
1742 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
1743 sta_flags->set & BIT(NL80211_STA_FLAG_WME))
1744 e->is_wme = 1;
1745
1746 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
1747 sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
1748 e->is_mfp = 1;
1749
1750 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
1751 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1752 e->is_tdls = 1;
1753 }
1754 }
1755
1756 e->noise = 0; /* filled in by caller */
1757 arr->count++;
1758
1759 return NL_SKIP;
1760 }
1761
1762 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1763 {
1764 DIR *d;
1765 int i, noise = 0;
1766 struct dirent *de;
1767 struct nl80211_msg_conveyor *req;
1768 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1769 struct iwinfo_assoclist_entry *e;
1770
1771 if ((d = opendir("/sys/class/net")) != NULL)
1772 {
1773 while ((de = readdir(d)) != NULL)
1774 {
1775 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1776 (!de->d_name[strlen(ifname)] ||
1777 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1778 {
1779 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1780 NLM_F_DUMP);
1781
1782 if (req)
1783 {
1784 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1785 nl80211_free(req);
1786 }
1787 }
1788 }
1789
1790 closedir(d);
1791
1792 if (!nl80211_get_noise(ifname, &noise))
1793 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1794 e->noise = noise;
1795
1796 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1797 return 0;
1798 }
1799
1800 return -1;
1801 }
1802
1803 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1804 {
1805 int *dbm_max = arg;
1806 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1807
1808 struct nlattr **attr = nl80211_parse(msg);
1809 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1810 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1811 struct nlattr *band, *freq;
1812
1813 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1814 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1815 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1816 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1817 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1818 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1819 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1820 };
1821
1822 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1823 *dbm_max = -1;
1824
1825 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1826 {
1827 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1828 nla_len(band), NULL);
1829
1830 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1831 {
1832 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1833 nla_data(freq), nla_len(freq), freq_policy);
1834
1835 ch_cmp = nl80211_freq2channel(nla_get_u32(
1836 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1837
1838 if ((!ch_cur || (ch_cmp == ch_cur)) &&
1839 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1840 {
1841 *dbm_max = (int)(0.01 * nla_get_u32(
1842 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1843
1844 break;
1845 }
1846 }
1847 }
1848
1849 return NL_SKIP;
1850 }
1851
1852 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1853 {
1854 int ch_cur;
1855 int dbm_max = -1, dbm_cur, dbm_cnt;
1856 struct nl80211_msg_conveyor *req;
1857 struct iwinfo_txpwrlist_entry entry;
1858
1859 if (nl80211_get_channel(ifname, &ch_cur))
1860 ch_cur = 0;
1861
1862 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1863 if (req)
1864 {
1865 /* initialize the value pointer with channel for callback */
1866 dbm_max = ch_cur;
1867
1868 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1869 nl80211_free(req);
1870 }
1871
1872 if (dbm_max > 0)
1873 {
1874 for (dbm_cur = 0, dbm_cnt = 0;
1875 dbm_cur < dbm_max;
1876 dbm_cur++, dbm_cnt++)
1877 {
1878 entry.dbm = dbm_cur;
1879 entry.mw = iwinfo_dbm2mw(dbm_cur);
1880
1881 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1882 }
1883
1884 entry.dbm = dbm_max;
1885 entry.mw = iwinfo_dbm2mw(dbm_max);
1886
1887 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1888 dbm_cnt++;
1889
1890 *len = dbm_cnt * sizeof(entry);
1891 return 0;
1892 }
1893
1894 return -1;
1895 }
1896
1897 static void nl80211_get_scancrypto(const char *spec,
1898 struct iwinfo_crypto_entry *c)
1899 {
1900 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1901 {
1902 c->enabled = 1;
1903
1904 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1905 c->wpa_version = 3;
1906
1907 else if (strstr(spec, "WPA2"))
1908 c->wpa_version = 2;
1909
1910 else if (strstr(spec, "WPA"))
1911 c->wpa_version = 1;
1912
1913 else if (strstr(spec, "WEP"))
1914 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1915
1916
1917 if (strstr(spec, "PSK"))
1918 c->auth_suites |= IWINFO_KMGMT_PSK;
1919
1920 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1921 c->auth_suites |= IWINFO_KMGMT_8021x;
1922
1923 if (strstr(spec, "WPA-NONE"))
1924 c->auth_suites |= IWINFO_KMGMT_NONE;
1925
1926
1927 if (strstr(spec, "TKIP"))
1928 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1929
1930 if (strstr(spec, "CCMP"))
1931 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1932
1933 if (strstr(spec, "WEP-40"))
1934 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1935
1936 if (strstr(spec, "WEP-104"))
1937 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1938
1939 c->group_ciphers = c->pair_ciphers;
1940 }
1941 else
1942 {
1943 c->enabled = 0;
1944 }
1945 }
1946
1947
1948 struct nl80211_scanlist {
1949 struct iwinfo_scanlist_entry *e;
1950 int len;
1951 };
1952
1953
1954 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1955 struct iwinfo_scanlist_entry *e)
1956 {
1957 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1958 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1959 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1960 int len;
1961
1962 while (ielen >= 2 && ielen >= ie[1])
1963 {
1964 switch (ie[0])
1965 {
1966 case 0: /* SSID */
1967 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
1968 memcpy(e->ssid, ie + 2, len);
1969 e->ssid[len] = 0;
1970 break;
1971
1972 case 48: /* RSN */
1973 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1974 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1975 break;
1976
1977 case 221: /* Vendor */
1978 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1979 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1980 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1981 break;
1982 }
1983
1984 ielen -= ie[1] + 2;
1985 ie += ie[1] + 2;
1986 }
1987 }
1988
1989 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
1990 {
1991 int8_t rssi;
1992 uint16_t caps;
1993
1994 struct nl80211_scanlist *sl = arg;
1995 struct nlattr **tb = nl80211_parse(msg);
1996 struct nlattr *bss[NL80211_BSS_MAX + 1];
1997
1998 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1999 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2000 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2001 [NL80211_BSS_BSSID] = { 0 },
2002 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2003 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2004 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
2005 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2006 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2007 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2008 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2009 [NL80211_BSS_BEACON_IES] = { 0 },
2010 };
2011
2012 if (!tb[NL80211_ATTR_BSS] ||
2013 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2014 bss_policy) ||
2015 !bss[NL80211_BSS_BSSID])
2016 {
2017 return NL_SKIP;
2018 }
2019
2020 if (bss[NL80211_BSS_CAPABILITY])
2021 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2022 else
2023 caps = 0;
2024
2025 memset(sl->e, 0, sizeof(*sl->e));
2026 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
2027
2028 if (caps & (1<<1))
2029 sl->e->mode = IWINFO_OPMODE_ADHOC;
2030 else if (caps & (1<<0))
2031 sl->e->mode = IWINFO_OPMODE_MASTER;
2032 else
2033 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
2034
2035 if (caps & (1<<4))
2036 sl->e->crypto.enabled = 1;
2037
2038 if (bss[NL80211_BSS_FREQUENCY])
2039 sl->e->channel = nl80211_freq2channel(nla_get_u32(
2040 bss[NL80211_BSS_FREQUENCY]));
2041
2042 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
2043 nl80211_get_scanlist_ie(bss, sl->e);
2044
2045 if (bss[NL80211_BSS_SIGNAL_MBM])
2046 {
2047 sl->e->signal =
2048 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
2049
2050 rssi = sl->e->signal - 0x100;
2051
2052 if (rssi < -110)
2053 rssi = -110;
2054 else if (rssi > -40)
2055 rssi = -40;
2056
2057 sl->e->quality = (rssi + 110);
2058 sl->e->quality_max = 70;
2059 }
2060
2061 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
2062 {
2063 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2064 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2065 }
2066
2067 sl->e++;
2068 sl->len++;
2069
2070 return NL_SKIP;
2071 }
2072
2073 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
2074 {
2075 struct nl80211_msg_conveyor *req;
2076 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
2077
2078 req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
2079 if (req)
2080 {
2081 nl80211_send(req, NULL, NULL);
2082 nl80211_free(req);
2083 }
2084
2085 nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
2086
2087 req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
2088 if (req)
2089 {
2090 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
2091 nl80211_free(req);
2092 }
2093
2094 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
2095 return *len ? 0 : -1;
2096 }
2097
2098 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
2099 {
2100 #define hex(x) \
2101 (((x) >= 'a') ? ((x) - 'a' + 10) : \
2102 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0')))
2103
2104 int len = 0;
2105
2106 while (*in)
2107 {
2108 if (len + 1 >= outlen)
2109 break;
2110
2111 switch (*in)
2112 {
2113 case '\\':
2114 in++;
2115 switch (*in)
2116 {
2117 case 'n':
2118 out[len++] = '\n'; in++;
2119 break;
2120
2121 case 'r':
2122 out[len++] = '\r'; in++;
2123 break;
2124
2125 case 't':
2126 out[len++] = '\t'; in++;
2127 break;
2128
2129 case 'e':
2130 out[len++] = '\033'; in++;
2131 break;
2132
2133 case 'x':
2134 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
2135 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
2136 in += 3;
2137 break;
2138
2139 default:
2140 out[len++] = *in++;
2141 break;
2142 }
2143 break;
2144
2145 default:
2146 out[len++] = *in++;
2147 break;
2148 }
2149 }
2150
2151 if (outlen > len)
2152 out[len] = '\0';
2153
2154 return len;
2155 }
2156
2157 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len)
2158 {
2159 int sock, qmax, rssi, tries, count = -1, ready = 0;
2160 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096];
2161 struct sockaddr_un local = { 0 };
2162 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
2163
2164 sock = nl80211_wpactl_connect(ifname, &local);
2165
2166 if (sock < 0)
2167 return sock;
2168
2169 send(sock, "ATTACH", 6, 0);
2170 send(sock, "SCAN", 4, 0);
2171
2172 /*
2173 * wait for scan results:
2174 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan
2175 * 72 channels at most. We'll also receive two "OK" messages acknowledging
2176 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra
2177 * time to process the results, so try 72 + 2 + 1 times.
2178 */
2179 for (tries = 0; tries < 75; tries++)
2180 {
2181 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0)
2182 continue;
2183
2184 /* got an event notification */
2185 if (reply[0] == '<')
2186 {
2187 /* scan results are ready */
2188 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS"))
2189 {
2190 /* send "SCAN_RESULTS" command */
2191 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12);
2192 break;
2193 }
2194
2195 /* is another unrelated event, retry */
2196 tries--;
2197 }
2198 }
2199
2200 /* receive and parse scan results if the wait above didn't time out */
2201 if (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
2202 {
2203 nl80211_get_quality_max(ifname, &qmax);
2204
2205 for (line = strtok_r(reply, "\n", &pos);
2206 line != NULL;
2207 line = strtok_r(NULL, "\n", &pos))
2208 {
2209 /* skip header line */
2210 if (count < 0)
2211 {
2212 count++;
2213 continue;
2214 }
2215
2216 bssid = strtok(line, "\t");
2217 freq = strtok(NULL, "\t");
2218 signal = strtok(NULL, "\t");
2219 flags = strtok(NULL, "\t");
2220 ssid = strtok(NULL, "\n");
2221
2222 if (!bssid || !freq || !signal || !flags || !ssid)
2223 continue;
2224
2225 /* BSSID */
2226 e->mac[0] = strtol(&bssid[0], NULL, 16);
2227 e->mac[1] = strtol(&bssid[3], NULL, 16);
2228 e->mac[2] = strtol(&bssid[6], NULL, 16);
2229 e->mac[3] = strtol(&bssid[9], NULL, 16);
2230 e->mac[4] = strtol(&bssid[12], NULL, 16);
2231 e->mac[5] = strtol(&bssid[15], NULL, 16);
2232
2233 /* SSID */
2234 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2235
2236 /* Mode */
2237 if (strstr(flags, "[MESH]"))
2238 e->mode = IWINFO_OPMODE_MESHPOINT;
2239 else if (strstr(flags, "[IBSS]"))
2240 e->mode = IWINFO_OPMODE_ADHOC;
2241 else
2242 e->mode = IWINFO_OPMODE_MASTER;
2243
2244 /* Channel */
2245 e->channel = nl80211_freq2channel(atoi(freq));
2246
2247 /* Signal */
2248 rssi = atoi(signal);
2249 e->signal = rssi;
2250
2251 /* Quality */
2252 if (rssi < 0)
2253 {
2254 /* The cfg80211 wext compat layer assumes a signal range
2255 * of -110 dBm to -40 dBm, the quality value is derived
2256 * by adding 110 to the signal level */
2257 if (rssi < -110)
2258 rssi = -110;
2259 else if (rssi > -40)
2260 rssi = -40;
2261
2262 e->quality = (rssi + 110);
2263 }
2264 else
2265 {
2266 e->quality = rssi;
2267 }
2268
2269 /* Max. Quality */
2270 e->quality_max = qmax;
2271
2272 /* Crypto */
2273 nl80211_get_scancrypto(flags, &e->crypto);
2274
2275 count++;
2276 e++;
2277 }
2278
2279 *len = count * sizeof(struct iwinfo_scanlist_entry);
2280 }
2281
2282 close(sock);
2283 unlink(local.sun_path);
2284
2285 return (count >= 0) ? 0 : -1;
2286 }
2287
2288 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
2289 {
2290 char *res;
2291 int rv, mode;
2292
2293 *len = 0;
2294
2295 /* Got a radioX pseudo interface, find some interface on it or create one */
2296 if (!strncmp(ifname, "radio", 5))
2297 {
2298 /* Reuse existing interface */
2299 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2300 {
2301 return nl80211_get_scanlist(res, buf, len);
2302 }
2303
2304 /* Need to spawn a temporary iface for scanning */
2305 else if ((res = nl80211_ifadd(ifname)) != NULL)
2306 {
2307 rv = nl80211_get_scanlist(res, buf, len);
2308 nl80211_ifdel(res);
2309 return rv;
2310 }
2311 }
2312
2313 /* WPA supplicant */
2314 if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
2315 {
2316 return 0;
2317 }
2318
2319 /* station / ad-hoc / monitor scan */
2320 else if (!nl80211_get_mode(ifname, &mode) &&
2321 (mode == IWINFO_OPMODE_ADHOC ||
2322 mode == IWINFO_OPMODE_MASTER ||
2323 mode == IWINFO_OPMODE_CLIENT ||
2324 mode == IWINFO_OPMODE_MONITOR) &&
2325 iwinfo_ifup(ifname))
2326 {
2327 return nl80211_get_scanlist_nl(ifname, buf, len);
2328 }
2329
2330 /* AP scan */
2331 else
2332 {
2333 /* Got a temp interface, don't create yet another one */
2334 if (!strncmp(ifname, "tmp.", 4))
2335 {
2336 if (!iwinfo_ifup(ifname))
2337 return -1;
2338
2339 rv = nl80211_get_scanlist_nl(ifname, buf, len);
2340 iwinfo_ifdown(ifname);
2341 return rv;
2342 }
2343
2344 /* Spawn a new scan interface */
2345 else
2346 {
2347 if (!(res = nl80211_ifadd(ifname)))
2348 return -1;
2349
2350 iwinfo_ifmac(res);
2351
2352 /* if we can take the new interface up, the driver supports an
2353 * additional interface and there's no need to tear down the ap */
2354 if (iwinfo_ifup(res))
2355 {
2356 rv = nl80211_get_scanlist_nl(res, buf, len);
2357 iwinfo_ifdown(res);
2358 }
2359
2360 /* driver cannot create secondary interface, take down ap
2361 * during scan */
2362 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2363 {
2364 rv = nl80211_get_scanlist_nl(res, buf, len);
2365 iwinfo_ifdown(res);
2366 iwinfo_ifup(ifname);
2367 nl80211_hostapd_hup(ifname);
2368 }
2369
2370 nl80211_ifdel(res);
2371 return rv;
2372 }
2373 }
2374
2375 return -1;
2376 }
2377
2378 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2379 {
2380 int bands_remain, freqs_remain;
2381
2382 struct nl80211_array_buf *arr = arg;
2383 struct iwinfo_freqlist_entry *e = arr->buf;
2384
2385 struct nlattr **attr = nl80211_parse(msg);
2386 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2387 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2388 struct nlattr *band, *freq;
2389
2390 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2391 {
2392 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2393 nla_data(band), nla_len(band), NULL);
2394
2395 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2396 {
2397 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2398 nla_data(freq), nla_len(freq), NULL);
2399
2400 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2401 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2402 continue;
2403
2404 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2405 e->channel = nl80211_freq2channel(e->mhz);
2406
2407 e->restricted = (
2408 freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
2409 !freqs[NL80211_FREQUENCY_ATTR_RADAR]
2410 ) ? 1 : 0;
2411
2412 e++;
2413 arr->count++;
2414 }
2415 }
2416
2417 return NL_SKIP;
2418 }
2419
2420 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2421 {
2422 struct nl80211_msg_conveyor *req;
2423 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2424
2425 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2426 if (req)
2427 {
2428 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2429 nl80211_free(req);
2430 }
2431
2432 if (arr.count > 0)
2433 {
2434 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2435 return 0;
2436 }
2437
2438 return -1;
2439 }
2440
2441 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2442 {
2443 char *buf = arg;
2444 struct nlattr **attr = nl80211_parse(msg);
2445
2446 if (attr[NL80211_ATTR_REG_ALPHA2])
2447 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2448 else
2449 buf[0] = 0;
2450
2451 return NL_SKIP;
2452 }
2453
2454 static int nl80211_get_country(const char *ifname, char *buf)
2455 {
2456 int rv = -1;
2457 struct nl80211_msg_conveyor *req;
2458
2459 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2460 if (req)
2461 {
2462 nl80211_send(req, nl80211_get_country_cb, buf);
2463 nl80211_free(req);
2464
2465 if (buf[0])
2466 rv = 0;
2467 }
2468
2469 return rv;
2470 }
2471
2472 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2473 {
2474 int count;
2475 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2476 const struct iwinfo_iso3166_label *l;
2477
2478 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2479 {
2480 e->iso3166 = l->iso3166;
2481 e->ccode[0] = (l->iso3166 / 256);
2482 e->ccode[1] = (l->iso3166 % 256);
2483 }
2484
2485 *len = (count * sizeof(struct iwinfo_country_entry));
2486 return 0;
2487 }
2488
2489
2490 struct nl80211_modes
2491 {
2492 bool ok;
2493 uint32_t hw;
2494 uint32_t ht;
2495 };
2496
2497 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
2498 {
2499 struct nl80211_modes *m = arg;
2500 int bands_remain, freqs_remain;
2501 uint16_t caps = 0;
2502 uint32_t vht_caps = 0;
2503 struct nlattr **attr = nl80211_parse(msg);
2504 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2505 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2506 struct nlattr *band, *freq;
2507
2508 if (attr[NL80211_ATTR_WIPHY_BANDS])
2509 {
2510 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2511 {
2512 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2513 nla_data(band), nla_len(band), NULL);
2514
2515 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2516 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2517
2518 /* Treat any nonzero capability as 11n */
2519 if (caps > 0)
2520 {
2521 m->hw |= IWINFO_80211_N;
2522 m->ht |= IWINFO_HTMODE_HT20;
2523
2524 if (caps & (1 << 1))
2525 m->ht |= IWINFO_HTMODE_HT40;
2526 }
2527
2528 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2529 freqs_remain)
2530 {
2531 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2532 nla_data(freq), nla_len(freq), NULL);
2533
2534 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2535 continue;
2536
2537 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2538 {
2539 m->hw |= IWINFO_80211_B;
2540 m->hw |= IWINFO_80211_G;
2541 }
2542 else if (bands[NL80211_BAND_ATTR_VHT_CAPA])
2543 {
2544 vht_caps = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
2545
2546 /* Treat any nonzero capability as 11ac */
2547 if (vht_caps > 0)
2548 {
2549 m->hw |= IWINFO_80211_AC;
2550 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
2551
2552 switch ((vht_caps >> 2) & 3)
2553 {
2554 case 2:
2555 m->ht |= IWINFO_HTMODE_VHT80_80;
2556 /* fall through */
2557
2558 case 1:
2559 m->ht |= IWINFO_HTMODE_VHT160;
2560 }
2561 }
2562 }
2563 else if (!(m->hw & IWINFO_80211_AC))
2564 {
2565 m->hw |= IWINFO_80211_A;
2566 }
2567 }
2568 }
2569
2570 m->ok = 1;
2571 }
2572
2573 return NL_SKIP;
2574 }
2575
2576 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
2577 {
2578 struct nl80211_msg_conveyor *req;
2579 struct nl80211_modes m = { 0 };
2580
2581 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2582 if (req)
2583 {
2584 nl80211_send(req, nl80211_get_modelist_cb, &m);
2585 nl80211_free(req);
2586 }
2587
2588 if (m.ok)
2589 {
2590 *buf = m.hw;
2591 return 0;
2592 }
2593
2594 return -1;
2595 }
2596
2597 static int nl80211_get_htmodelist(const char *ifname, int *buf)
2598 {
2599 struct nl80211_msg_conveyor *req;
2600 struct nl80211_modes m = { 0 };
2601
2602 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2603 if (req)
2604 {
2605 nl80211_send(req, nl80211_get_modelist_cb, &m);
2606 nl80211_free(req);
2607 }
2608
2609 if (m.ok)
2610 {
2611 *buf = m.ht;
2612 return 0;
2613 }
2614
2615 return -1;
2616 }
2617
2618
2619 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
2620 {
2621 struct nlattr **attr = nl80211_parse(msg);
2622 struct nlattr *comb;
2623 int *ret = arg;
2624 int comb_rem, limit_rem, mode_rem;
2625
2626 *ret = 0;
2627 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
2628 return NL_SKIP;
2629
2630 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
2631 {
2632 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
2633 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
2634 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
2635 };
2636 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1];
2637 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
2638 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
2639 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
2640 };
2641 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1];
2642 struct nlattr *limit;
2643
2644 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy);
2645
2646 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
2647 continue;
2648
2649 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
2650 {
2651 struct nlattr *mode;
2652
2653 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
2654
2655 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
2656 !tb_limit[NL80211_IFACE_LIMIT_MAX])
2657 continue;
2658
2659 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
2660 continue;
2661
2662 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
2663 if (nla_type(mode) == NL80211_IFTYPE_AP)
2664 *ret = 1;
2665 }
2666 }
2667 }
2668
2669 return NL_SKIP;
2670 }
2671
2672 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
2673 {
2674 struct nl80211_msg_conveyor *req;
2675
2676 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2677 if (!req)
2678 return -1;
2679
2680 nl80211_send(req, nl80211_get_ifcomb_cb, buf);
2681 nl80211_free(req);
2682 return 0;
2683 }
2684
2685 static int nl80211_get_hardware_id(const char *ifname, char *buf)
2686 {
2687 int rv;
2688 char *res;
2689
2690 /* Got a radioX pseudo interface, find some interface on it or create one */
2691 if (!strncmp(ifname, "radio", 5))
2692 {
2693 /* Reuse existing interface */
2694 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2695 {
2696 rv = wext_ops.hardware_id(res, buf);
2697 }
2698
2699 /* Need to spawn a temporary iface for finding IDs */
2700 else if ((res = nl80211_ifadd(ifname)) != NULL)
2701 {
2702 rv = wext_ops.hardware_id(res, buf);
2703 nl80211_ifdel(res);
2704 }
2705 }
2706 else
2707 {
2708 rv = wext_ops.hardware_id(ifname, buf);
2709 }
2710
2711 /* Failed to obtain hardware IDs, search board config */
2712 if (rv)
2713 {
2714 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2715 }
2716
2717 return rv;
2718 }
2719
2720 static const struct iwinfo_hardware_entry *
2721 nl80211_get_hardware_entry(const char *ifname)
2722 {
2723 struct iwinfo_hardware_id id;
2724
2725 if (nl80211_get_hardware_id(ifname, (char *)&id))
2726 return NULL;
2727
2728 return iwinfo_hardware(&id);
2729 }
2730
2731 static int nl80211_get_hardware_name(const char *ifname, char *buf)
2732 {
2733 const struct iwinfo_hardware_entry *hw;
2734
2735 if (!(hw = nl80211_get_hardware_entry(ifname)))
2736 sprintf(buf, "Generic MAC80211");
2737 else
2738 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2739
2740 return 0;
2741 }
2742
2743 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
2744 {
2745 const struct iwinfo_hardware_entry *hw;
2746
2747 if (!(hw = nl80211_get_hardware_entry(ifname)))
2748 return -1;
2749
2750 *buf = hw->txpower_offset;
2751 return 0;
2752 }
2753
2754 static int nl80211_get_frequency_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->frequency_offset;
2762 return 0;
2763 }
2764
2765 static int nl80211_lookup_phyname(const char *section, char *buf)
2766 {
2767 int idx;
2768
2769 if ((idx = nl80211_phy_idx_from_uci(section)) < 0)
2770 return -1;
2771
2772 sprintf(buf, "phy%d", idx);
2773 return 0;
2774 }
2775
2776 const struct iwinfo_ops nl80211_ops = {
2777 .name = "nl80211",
2778 .probe = nl80211_probe,
2779 .channel = nl80211_get_channel,
2780 .frequency = nl80211_get_frequency,
2781 .frequency_offset = nl80211_get_frequency_offset,
2782 .txpower = nl80211_get_txpower,
2783 .txpower_offset = nl80211_get_txpower_offset,
2784 .bitrate = nl80211_get_bitrate,
2785 .signal = nl80211_get_signal,
2786 .noise = nl80211_get_noise,
2787 .quality = nl80211_get_quality,
2788 .quality_max = nl80211_get_quality_max,
2789 .mbssid_support = nl80211_get_mbssid_support,
2790 .hwmodelist = nl80211_get_hwmodelist,
2791 .htmodelist = nl80211_get_htmodelist,
2792 .mode = nl80211_get_mode,
2793 .ssid = nl80211_get_ssid,
2794 .bssid = nl80211_get_bssid,
2795 .country = nl80211_get_country,
2796 .hardware_id = nl80211_get_hardware_id,
2797 .hardware_name = nl80211_get_hardware_name,
2798 .encryption = nl80211_get_encryption,
2799 .phyname = nl80211_get_phyname,
2800 .assoclist = nl80211_get_assoclist,
2801 .txpwrlist = nl80211_get_txpwrlist,
2802 .scanlist = nl80211_get_scanlist,
2803 .freqlist = nl80211_get_freqlist,
2804 .countrylist = nl80211_get_countrylist,
2805 .lookup_phy = nl80211_lookup_phyname,
2806 .close = nl80211_close
2807 };
Library for accessing wireless device drivers