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nl80211: add VHT rateinfo support
[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 void nl80211_parse_rateinfo(struct nlattr **ri,
1629 struct iwinfo_rate_entry *re)
1630 {
1631 if (ri[NL80211_RATE_INFO_BITRATE32])
1632 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100;
1633 else if (ri[NL80211_RATE_INFO_BITRATE])
1634 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100;
1635
1636 if (ri[NL80211_RATE_INFO_VHT_MCS])
1637 {
1638 re->is_vht = 1;
1639 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]);
1640
1641 if (ri[NL80211_RATE_INFO_VHT_NSS])
1642 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]);
1643 }
1644 else if (ri[NL80211_RATE_INFO_MCS])
1645 {
1646 re->is_ht = 1;
1647 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]);
1648 }
1649
1650 if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH])
1651 re->mhz = 5;
1652 else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH])
1653 re->mhz = 10;
1654 else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH])
1655 re->mhz = 40;
1656 else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH])
1657 re->mhz = 80;
1658 else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] ||
1659 ri[NL80211_RATE_INFO_160_MHZ_WIDTH])
1660 re->mhz = 160;
1661 else
1662 re->mhz = 20;
1663
1664 if (ri[NL80211_RATE_INFO_SHORT_GI])
1665 re->is_short_gi = 1;
1666
1667 re->is_40mhz = (re->mhz == 40);
1668 }
1669
1670 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1671 {
1672 struct nl80211_array_buf *arr = arg;
1673 struct iwinfo_assoclist_entry *e = arr->buf;
1674 struct nlattr **attr = nl80211_parse(msg);
1675 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1676 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1677 struct nl80211_sta_flag_update *sta_flags;
1678
1679 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1680 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1681 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1682 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1683 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1684 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1685 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1686 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1687 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1688 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 },
1689 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
1690 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 },
1691 [NL80211_STA_INFO_STA_FLAGS] =
1692 { .minlen = sizeof(struct nl80211_sta_flag_update) },
1693 };
1694
1695 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1696 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1697 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1698 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1699 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1700 };
1701
1702 /* advance to end of array */
1703 e += arr->count;
1704 memset(e, 0, sizeof(*e));
1705
1706 if (attr[NL80211_ATTR_MAC])
1707 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1708
1709 if (attr[NL80211_ATTR_STA_INFO] &&
1710 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1711 attr[NL80211_ATTR_STA_INFO], stats_policy))
1712 {
1713 if (sinfo[NL80211_STA_INFO_SIGNAL])
1714 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1715
1716 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1717 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1718
1719 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1720 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1721
1722 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1723 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1724
1725 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1726 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1727 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1728 nl80211_parse_rateinfo(rinfo, &e->rx_rate);
1729
1730 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1731 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1732 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1733 nl80211_parse_rateinfo(rinfo, &e->tx_rate);
1734
1735 if (sinfo[NL80211_STA_INFO_RX_BYTES])
1736 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
1737
1738 if (sinfo[NL80211_STA_INFO_TX_BYTES])
1739 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
1740
1741 if (sinfo[NL80211_STA_INFO_TX_RETRIES])
1742 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
1743
1744 if (sinfo[NL80211_STA_INFO_TX_FAILED])
1745 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
1746
1747 if (sinfo[NL80211_STA_INFO_T_OFFSET])
1748 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]);
1749
1750 /* Station flags */
1751 if (sinfo[NL80211_STA_INFO_STA_FLAGS])
1752 {
1753 sta_flags = (struct nl80211_sta_flag_update *)
1754 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
1755
1756 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
1757 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
1758 e->is_authorized = 1;
1759
1760 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
1761 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1762 e->is_authenticated = 1;
1763
1764 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
1765 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1766 e->is_preamble_short = 1;
1767
1768 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
1769 sta_flags->set & BIT(NL80211_STA_FLAG_WME))
1770 e->is_wme = 1;
1771
1772 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
1773 sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
1774 e->is_mfp = 1;
1775
1776 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
1777 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1778 e->is_tdls = 1;
1779 }
1780 }
1781
1782 e->noise = 0; /* filled in by caller */
1783 arr->count++;
1784
1785 return NL_SKIP;
1786 }
1787
1788 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1789 {
1790 DIR *d;
1791 int i, noise = 0;
1792 struct dirent *de;
1793 struct nl80211_msg_conveyor *req;
1794 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1795 struct iwinfo_assoclist_entry *e;
1796
1797 if ((d = opendir("/sys/class/net")) != NULL)
1798 {
1799 while ((de = readdir(d)) != NULL)
1800 {
1801 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1802 (!de->d_name[strlen(ifname)] ||
1803 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1804 {
1805 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1806 NLM_F_DUMP);
1807
1808 if (req)
1809 {
1810 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1811 nl80211_free(req);
1812 }
1813 }
1814 }
1815
1816 closedir(d);
1817
1818 if (!nl80211_get_noise(ifname, &noise))
1819 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1820 e->noise = noise;
1821
1822 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1823 return 0;
1824 }
1825
1826 return -1;
1827 }
1828
1829 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1830 {
1831 int *dbm_max = arg;
1832 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1833
1834 struct nlattr **attr = nl80211_parse(msg);
1835 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1836 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1837 struct nlattr *band, *freq;
1838
1839 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1840 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1841 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1842 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1843 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1844 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1845 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1846 };
1847
1848 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1849 *dbm_max = -1;
1850
1851 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1852 {
1853 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1854 nla_len(band), NULL);
1855
1856 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1857 {
1858 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1859 nla_data(freq), nla_len(freq), freq_policy);
1860
1861 ch_cmp = nl80211_freq2channel(nla_get_u32(
1862 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1863
1864 if ((!ch_cur || (ch_cmp == ch_cur)) &&
1865 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1866 {
1867 *dbm_max = (int)(0.01 * nla_get_u32(
1868 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1869
1870 break;
1871 }
1872 }
1873 }
1874
1875 return NL_SKIP;
1876 }
1877
1878 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1879 {
1880 int ch_cur;
1881 int dbm_max = -1, dbm_cur, dbm_cnt;
1882 struct nl80211_msg_conveyor *req;
1883 struct iwinfo_txpwrlist_entry entry;
1884
1885 if (nl80211_get_channel(ifname, &ch_cur))
1886 ch_cur = 0;
1887
1888 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1889 if (req)
1890 {
1891 /* initialize the value pointer with channel for callback */
1892 dbm_max = ch_cur;
1893
1894 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1895 nl80211_free(req);
1896 }
1897
1898 if (dbm_max > 0)
1899 {
1900 for (dbm_cur = 0, dbm_cnt = 0;
1901 dbm_cur < dbm_max;
1902 dbm_cur++, dbm_cnt++)
1903 {
1904 entry.dbm = dbm_cur;
1905 entry.mw = iwinfo_dbm2mw(dbm_cur);
1906
1907 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1908 }
1909
1910 entry.dbm = dbm_max;
1911 entry.mw = iwinfo_dbm2mw(dbm_max);
1912
1913 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1914 dbm_cnt++;
1915
1916 *len = dbm_cnt * sizeof(entry);
1917 return 0;
1918 }
1919
1920 return -1;
1921 }
1922
1923 static void nl80211_get_scancrypto(const char *spec,
1924 struct iwinfo_crypto_entry *c)
1925 {
1926 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1927 {
1928 c->enabled = 1;
1929
1930 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1931 c->wpa_version = 3;
1932
1933 else if (strstr(spec, "WPA2"))
1934 c->wpa_version = 2;
1935
1936 else if (strstr(spec, "WPA"))
1937 c->wpa_version = 1;
1938
1939 else if (strstr(spec, "WEP"))
1940 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1941
1942
1943 if (strstr(spec, "PSK"))
1944 c->auth_suites |= IWINFO_KMGMT_PSK;
1945
1946 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1947 c->auth_suites |= IWINFO_KMGMT_8021x;
1948
1949 if (strstr(spec, "WPA-NONE"))
1950 c->auth_suites |= IWINFO_KMGMT_NONE;
1951
1952
1953 if (strstr(spec, "TKIP"))
1954 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1955
1956 if (strstr(spec, "CCMP"))
1957 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1958
1959 if (strstr(spec, "WEP-40"))
1960 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1961
1962 if (strstr(spec, "WEP-104"))
1963 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1964
1965 c->group_ciphers = c->pair_ciphers;
1966 }
1967 else
1968 {
1969 c->enabled = 0;
1970 }
1971 }
1972
1973
1974 struct nl80211_scanlist {
1975 struct iwinfo_scanlist_entry *e;
1976 int len;
1977 };
1978
1979
1980 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1981 struct iwinfo_scanlist_entry *e)
1982 {
1983 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1984 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1985 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1986 int len;
1987
1988 while (ielen >= 2 && ielen >= ie[1])
1989 {
1990 switch (ie[0])
1991 {
1992 case 0: /* SSID */
1993 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
1994 memcpy(e->ssid, ie + 2, len);
1995 e->ssid[len] = 0;
1996 break;
1997
1998 case 48: /* RSN */
1999 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
2000 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
2001 break;
2002
2003 case 221: /* Vendor */
2004 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
2005 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
2006 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
2007 break;
2008 }
2009
2010 ielen -= ie[1] + 2;
2011 ie += ie[1] + 2;
2012 }
2013 }
2014
2015 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
2016 {
2017 int8_t rssi;
2018 uint16_t caps;
2019
2020 struct nl80211_scanlist *sl = arg;
2021 struct nlattr **tb = nl80211_parse(msg);
2022 struct nlattr *bss[NL80211_BSS_MAX + 1];
2023
2024 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2025 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2026 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2027 [NL80211_BSS_BSSID] = { 0 },
2028 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2029 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2030 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
2031 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2032 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2033 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2034 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2035 [NL80211_BSS_BEACON_IES] = { 0 },
2036 };
2037
2038 if (!tb[NL80211_ATTR_BSS] ||
2039 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2040 bss_policy) ||
2041 !bss[NL80211_BSS_BSSID])
2042 {
2043 return NL_SKIP;
2044 }
2045
2046 if (bss[NL80211_BSS_CAPABILITY])
2047 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2048 else
2049 caps = 0;
2050
2051 memset(sl->e, 0, sizeof(*sl->e));
2052 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
2053
2054 if (caps & (1<<1))
2055 sl->e->mode = IWINFO_OPMODE_ADHOC;
2056 else if (caps & (1<<0))
2057 sl->e->mode = IWINFO_OPMODE_MASTER;
2058 else
2059 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
2060
2061 if (caps & (1<<4))
2062 sl->e->crypto.enabled = 1;
2063
2064 if (bss[NL80211_BSS_FREQUENCY])
2065 sl->e->channel = nl80211_freq2channel(nla_get_u32(
2066 bss[NL80211_BSS_FREQUENCY]));
2067
2068 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
2069 nl80211_get_scanlist_ie(bss, sl->e);
2070
2071 if (bss[NL80211_BSS_SIGNAL_MBM])
2072 {
2073 sl->e->signal =
2074 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
2075
2076 rssi = sl->e->signal - 0x100;
2077
2078 if (rssi < -110)
2079 rssi = -110;
2080 else if (rssi > -40)
2081 rssi = -40;
2082
2083 sl->e->quality = (rssi + 110);
2084 sl->e->quality_max = 70;
2085 }
2086
2087 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
2088 {
2089 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2090 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2091 }
2092
2093 sl->e++;
2094 sl->len++;
2095
2096 return NL_SKIP;
2097 }
2098
2099 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
2100 {
2101 struct nl80211_msg_conveyor *req;
2102 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
2103
2104 req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
2105 if (req)
2106 {
2107 nl80211_send(req, NULL, NULL);
2108 nl80211_free(req);
2109 }
2110
2111 nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
2112
2113 req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
2114 if (req)
2115 {
2116 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
2117 nl80211_free(req);
2118 }
2119
2120 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
2121 return *len ? 0 : -1;
2122 }
2123
2124 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
2125 {
2126 #define hex(x) \
2127 (((x) >= 'a') ? ((x) - 'a' + 10) : \
2128 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0')))
2129
2130 int len = 0;
2131
2132 while (*in)
2133 {
2134 if (len + 1 >= outlen)
2135 break;
2136
2137 switch (*in)
2138 {
2139 case '\\':
2140 in++;
2141 switch (*in)
2142 {
2143 case 'n':
2144 out[len++] = '\n'; in++;
2145 break;
2146
2147 case 'r':
2148 out[len++] = '\r'; in++;
2149 break;
2150
2151 case 't':
2152 out[len++] = '\t'; in++;
2153 break;
2154
2155 case 'e':
2156 out[len++] = '\033'; in++;
2157 break;
2158
2159 case 'x':
2160 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
2161 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
2162 in += 3;
2163 break;
2164
2165 default:
2166 out[len++] = *in++;
2167 break;
2168 }
2169 break;
2170
2171 default:
2172 out[len++] = *in++;
2173 break;
2174 }
2175 }
2176
2177 if (outlen > len)
2178 out[len] = '\0';
2179
2180 return len;
2181 }
2182
2183 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len)
2184 {
2185 int sock, qmax, rssi, tries, count = -1, ready = 0;
2186 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096];
2187 struct sockaddr_un local = { 0 };
2188 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
2189
2190 sock = nl80211_wpactl_connect(ifname, &local);
2191
2192 if (sock < 0)
2193 return sock;
2194
2195 send(sock, "ATTACH", 6, 0);
2196 send(sock, "SCAN", 4, 0);
2197
2198 /*
2199 * wait for scan results:
2200 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan
2201 * 72 channels at most. We'll also receive two "OK" messages acknowledging
2202 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra
2203 * time to process the results, so try 72 + 2 + 1 times.
2204 */
2205 for (tries = 0; tries < 75; tries++)
2206 {
2207 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0)
2208 continue;
2209
2210 /* got an event notification */
2211 if (reply[0] == '<')
2212 {
2213 /* scan results are ready */
2214 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS"))
2215 {
2216 /* send "SCAN_RESULTS" command */
2217 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12);
2218 break;
2219 }
2220
2221 /* is another unrelated event, retry */
2222 tries--;
2223 }
2224 }
2225
2226 /* receive and parse scan results if the wait above didn't time out */
2227 if (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
2228 {
2229 nl80211_get_quality_max(ifname, &qmax);
2230
2231 for (line = strtok_r(reply, "\n", &pos);
2232 line != NULL;
2233 line = strtok_r(NULL, "\n", &pos))
2234 {
2235 /* skip header line */
2236 if (count < 0)
2237 {
2238 count++;
2239 continue;
2240 }
2241
2242 bssid = strtok(line, "\t");
2243 freq = strtok(NULL, "\t");
2244 signal = strtok(NULL, "\t");
2245 flags = strtok(NULL, "\t");
2246 ssid = strtok(NULL, "\n");
2247
2248 if (!bssid || !freq || !signal || !flags || !ssid)
2249 continue;
2250
2251 /* BSSID */
2252 e->mac[0] = strtol(&bssid[0], NULL, 16);
2253 e->mac[1] = strtol(&bssid[3], NULL, 16);
2254 e->mac[2] = strtol(&bssid[6], NULL, 16);
2255 e->mac[3] = strtol(&bssid[9], NULL, 16);
2256 e->mac[4] = strtol(&bssid[12], NULL, 16);
2257 e->mac[5] = strtol(&bssid[15], NULL, 16);
2258
2259 /* SSID */
2260 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2261
2262 /* Mode */
2263 if (strstr(flags, "[MESH]"))
2264 e->mode = IWINFO_OPMODE_MESHPOINT;
2265 else if (strstr(flags, "[IBSS]"))
2266 e->mode = IWINFO_OPMODE_ADHOC;
2267 else
2268 e->mode = IWINFO_OPMODE_MASTER;
2269
2270 /* Channel */
2271 e->channel = nl80211_freq2channel(atoi(freq));
2272
2273 /* Signal */
2274 rssi = atoi(signal);
2275 e->signal = rssi;
2276
2277 /* Quality */
2278 if (rssi < 0)
2279 {
2280 /* The cfg80211 wext compat layer assumes a signal range
2281 * of -110 dBm to -40 dBm, the quality value is derived
2282 * by adding 110 to the signal level */
2283 if (rssi < -110)
2284 rssi = -110;
2285 else if (rssi > -40)
2286 rssi = -40;
2287
2288 e->quality = (rssi + 110);
2289 }
2290 else
2291 {
2292 e->quality = rssi;
2293 }
2294
2295 /* Max. Quality */
2296 e->quality_max = qmax;
2297
2298 /* Crypto */
2299 nl80211_get_scancrypto(flags, &e->crypto);
2300
2301 count++;
2302 e++;
2303 }
2304
2305 *len = count * sizeof(struct iwinfo_scanlist_entry);
2306 }
2307
2308 close(sock);
2309 unlink(local.sun_path);
2310
2311 return (count >= 0) ? 0 : -1;
2312 }
2313
2314 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
2315 {
2316 char *res;
2317 int rv, mode;
2318
2319 *len = 0;
2320
2321 /* Got a radioX pseudo interface, find some interface on it or create one */
2322 if (!strncmp(ifname, "radio", 5))
2323 {
2324 /* Reuse existing interface */
2325 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2326 {
2327 return nl80211_get_scanlist(res, buf, len);
2328 }
2329
2330 /* Need to spawn a temporary iface for scanning */
2331 else if ((res = nl80211_ifadd(ifname)) != NULL)
2332 {
2333 rv = nl80211_get_scanlist(res, buf, len);
2334 nl80211_ifdel(res);
2335 return rv;
2336 }
2337 }
2338
2339 /* WPA supplicant */
2340 if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
2341 {
2342 return 0;
2343 }
2344
2345 /* station / ad-hoc / monitor scan */
2346 else if (!nl80211_get_mode(ifname, &mode) &&
2347 (mode == IWINFO_OPMODE_ADHOC ||
2348 mode == IWINFO_OPMODE_MASTER ||
2349 mode == IWINFO_OPMODE_CLIENT ||
2350 mode == IWINFO_OPMODE_MONITOR) &&
2351 iwinfo_ifup(ifname))
2352 {
2353 return nl80211_get_scanlist_nl(ifname, buf, len);
2354 }
2355
2356 /* AP scan */
2357 else
2358 {
2359 /* Got a temp interface, don't create yet another one */
2360 if (!strncmp(ifname, "tmp.", 4))
2361 {
2362 if (!iwinfo_ifup(ifname))
2363 return -1;
2364
2365 rv = nl80211_get_scanlist_nl(ifname, buf, len);
2366 iwinfo_ifdown(ifname);
2367 return rv;
2368 }
2369
2370 /* Spawn a new scan interface */
2371 else
2372 {
2373 if (!(res = nl80211_ifadd(ifname)))
2374 return -1;
2375
2376 iwinfo_ifmac(res);
2377
2378 /* if we can take the new interface up, the driver supports an
2379 * additional interface and there's no need to tear down the ap */
2380 if (iwinfo_ifup(res))
2381 {
2382 rv = nl80211_get_scanlist_nl(res, buf, len);
2383 iwinfo_ifdown(res);
2384 }
2385
2386 /* driver cannot create secondary interface, take down ap
2387 * during scan */
2388 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2389 {
2390 rv = nl80211_get_scanlist_nl(res, buf, len);
2391 iwinfo_ifdown(res);
2392 iwinfo_ifup(ifname);
2393 nl80211_hostapd_hup(ifname);
2394 }
2395
2396 nl80211_ifdel(res);
2397 return rv;
2398 }
2399 }
2400
2401 return -1;
2402 }
2403
2404 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2405 {
2406 int bands_remain, freqs_remain;
2407
2408 struct nl80211_array_buf *arr = arg;
2409 struct iwinfo_freqlist_entry *e = arr->buf;
2410
2411 struct nlattr **attr = nl80211_parse(msg);
2412 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2413 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2414 struct nlattr *band, *freq;
2415
2416 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2417 {
2418 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2419 nla_data(band), nla_len(band), NULL);
2420
2421 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2422 {
2423 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2424 nla_data(freq), nla_len(freq), NULL);
2425
2426 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2427 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2428 continue;
2429
2430 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2431 e->channel = nl80211_freq2channel(e->mhz);
2432
2433 e->restricted = (
2434 freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
2435 !freqs[NL80211_FREQUENCY_ATTR_RADAR]
2436 ) ? 1 : 0;
2437
2438 e++;
2439 arr->count++;
2440 }
2441 }
2442
2443 return NL_SKIP;
2444 }
2445
2446 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2447 {
2448 struct nl80211_msg_conveyor *req;
2449 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2450
2451 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2452 if (req)
2453 {
2454 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2455 nl80211_free(req);
2456 }
2457
2458 if (arr.count > 0)
2459 {
2460 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2461 return 0;
2462 }
2463
2464 return -1;
2465 }
2466
2467 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2468 {
2469 char *buf = arg;
2470 struct nlattr **attr = nl80211_parse(msg);
2471
2472 if (attr[NL80211_ATTR_REG_ALPHA2])
2473 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2474 else
2475 buf[0] = 0;
2476
2477 return NL_SKIP;
2478 }
2479
2480 static int nl80211_get_country(const char *ifname, char *buf)
2481 {
2482 int rv = -1;
2483 struct nl80211_msg_conveyor *req;
2484
2485 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2486 if (req)
2487 {
2488 nl80211_send(req, nl80211_get_country_cb, buf);
2489 nl80211_free(req);
2490
2491 if (buf[0])
2492 rv = 0;
2493 }
2494
2495 return rv;
2496 }
2497
2498 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2499 {
2500 int count;
2501 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2502 const struct iwinfo_iso3166_label *l;
2503
2504 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2505 {
2506 e->iso3166 = l->iso3166;
2507 e->ccode[0] = (l->iso3166 / 256);
2508 e->ccode[1] = (l->iso3166 % 256);
2509 e->ccode[2] = 0;
2510 }
2511
2512 *len = (count * sizeof(struct iwinfo_country_entry));
2513 return 0;
2514 }
2515
2516
2517 struct nl80211_modes
2518 {
2519 bool ok;
2520 uint32_t hw;
2521 uint32_t ht;
2522 };
2523
2524 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
2525 {
2526 struct nl80211_modes *m = arg;
2527 int bands_remain, freqs_remain;
2528 uint16_t caps = 0;
2529 uint32_t vht_caps = 0;
2530 struct nlattr **attr = nl80211_parse(msg);
2531 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2532 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2533 struct nlattr *band, *freq;
2534
2535 if (attr[NL80211_ATTR_WIPHY_BANDS])
2536 {
2537 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2538 {
2539 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2540 nla_data(band), nla_len(band), NULL);
2541
2542 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2543 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2544
2545 /* Treat any nonzero capability as 11n */
2546 if (caps > 0)
2547 {
2548 m->hw |= IWINFO_80211_N;
2549 m->ht |= IWINFO_HTMODE_HT20;
2550
2551 if (caps & (1 << 1))
2552 m->ht |= IWINFO_HTMODE_HT40;
2553 }
2554
2555 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2556 freqs_remain)
2557 {
2558 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2559 nla_data(freq), nla_len(freq), NULL);
2560
2561 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2562 continue;
2563
2564 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2565 {
2566 m->hw |= IWINFO_80211_B;
2567 m->hw |= IWINFO_80211_G;
2568 }
2569 else if (bands[NL80211_BAND_ATTR_VHT_CAPA])
2570 {
2571 vht_caps = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
2572
2573 /* Treat any nonzero capability as 11ac */
2574 if (vht_caps > 0)
2575 {
2576 m->hw |= IWINFO_80211_AC;
2577 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
2578
2579 switch ((vht_caps >> 2) & 3)
2580 {
2581 case 2:
2582 m->ht |= IWINFO_HTMODE_VHT80_80;
2583 /* fall through */
2584
2585 case 1:
2586 m->ht |= IWINFO_HTMODE_VHT160;
2587 }
2588 }
2589 }
2590 else if (!(m->hw & IWINFO_80211_AC))
2591 {
2592 m->hw |= IWINFO_80211_A;
2593 }
2594 }
2595 }
2596
2597 m->ok = 1;
2598 }
2599
2600 return NL_SKIP;
2601 }
2602
2603 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
2604 {
2605 struct nl80211_msg_conveyor *req;
2606 struct nl80211_modes m = { 0 };
2607
2608 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2609 if (req)
2610 {
2611 nl80211_send(req, nl80211_get_modelist_cb, &m);
2612 nl80211_free(req);
2613 }
2614
2615 if (m.ok)
2616 {
2617 *buf = m.hw;
2618 return 0;
2619 }
2620
2621 return -1;
2622 }
2623
2624 static int nl80211_get_htmodelist(const char *ifname, int *buf)
2625 {
2626 struct nl80211_msg_conveyor *req;
2627 struct nl80211_modes m = { 0 };
2628
2629 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2630 if (req)
2631 {
2632 nl80211_send(req, nl80211_get_modelist_cb, &m);
2633 nl80211_free(req);
2634 }
2635
2636 if (m.ok)
2637 {
2638 *buf = m.ht;
2639 return 0;
2640 }
2641
2642 return -1;
2643 }
2644
2645
2646 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
2647 {
2648 struct nlattr **attr = nl80211_parse(msg);
2649 struct nlattr *comb;
2650 int *ret = arg;
2651 int comb_rem, limit_rem, mode_rem;
2652
2653 *ret = 0;
2654 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
2655 return NL_SKIP;
2656
2657 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
2658 {
2659 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
2660 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
2661 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
2662 };
2663 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1];
2664 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
2665 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
2666 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
2667 };
2668 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1];
2669 struct nlattr *limit;
2670
2671 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy);
2672
2673 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
2674 continue;
2675
2676 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
2677 {
2678 struct nlattr *mode;
2679
2680 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
2681
2682 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
2683 !tb_limit[NL80211_IFACE_LIMIT_MAX])
2684 continue;
2685
2686 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
2687 continue;
2688
2689 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
2690 if (nla_type(mode) == NL80211_IFTYPE_AP)
2691 *ret = 1;
2692 }
2693 }
2694 }
2695
2696 return NL_SKIP;
2697 }
2698
2699 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
2700 {
2701 struct nl80211_msg_conveyor *req;
2702
2703 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2704 if (!req)
2705 return -1;
2706
2707 nl80211_send(req, nl80211_get_ifcomb_cb, buf);
2708 nl80211_free(req);
2709 return 0;
2710 }
2711
2712 static int nl80211_get_hardware_id(const char *ifname, char *buf)
2713 {
2714 int rv = -1;
2715 char *res;
2716
2717 /* Got a radioX pseudo interface, find some interface on it or create one */
2718 if (!strncmp(ifname, "radio", 5))
2719 {
2720 /* Reuse existing interface */
2721 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2722 {
2723 rv = wext_ops.hardware_id(res, buf);
2724 }
2725
2726 /* Need to spawn a temporary iface for finding IDs */
2727 else if ((res = nl80211_ifadd(ifname)) != NULL)
2728 {
2729 rv = wext_ops.hardware_id(res, buf);
2730 nl80211_ifdel(res);
2731 }
2732 }
2733 else
2734 {
2735 rv = wext_ops.hardware_id(ifname, buf);
2736 }
2737
2738 /* Failed to obtain hardware IDs, search board config */
2739 if (rv)
2740 {
2741 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2742 }
2743
2744 return rv;
2745 }
2746
2747 static const struct iwinfo_hardware_entry *
2748 nl80211_get_hardware_entry(const char *ifname)
2749 {
2750 struct iwinfo_hardware_id id;
2751
2752 if (nl80211_get_hardware_id(ifname, (char *)&id))
2753 return NULL;
2754
2755 return iwinfo_hardware(&id);
2756 }
2757
2758 static int nl80211_get_hardware_name(const char *ifname, char *buf)
2759 {
2760 const struct iwinfo_hardware_entry *hw;
2761
2762 if (!(hw = nl80211_get_hardware_entry(ifname)))
2763 sprintf(buf, "Generic MAC80211");
2764 else
2765 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2766
2767 return 0;
2768 }
2769
2770 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
2771 {
2772 const struct iwinfo_hardware_entry *hw;
2773
2774 if (!(hw = nl80211_get_hardware_entry(ifname)))
2775 return -1;
2776
2777 *buf = hw->txpower_offset;
2778 return 0;
2779 }
2780
2781 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
2782 {
2783 const struct iwinfo_hardware_entry *hw;
2784
2785 if (!(hw = nl80211_get_hardware_entry(ifname)))
2786 return -1;
2787
2788 *buf = hw->frequency_offset;
2789 return 0;
2790 }
2791
2792 static int nl80211_lookup_phyname(const char *section, char *buf)
2793 {
2794 int idx;
2795
2796 if ((idx = nl80211_phy_idx_from_uci(section)) < 0)
2797 return -1;
2798
2799 sprintf(buf, "phy%d", idx);
2800 return 0;
2801 }
2802
2803 const struct iwinfo_ops nl80211_ops = {
2804 .name = "nl80211",
2805 .probe = nl80211_probe,
2806 .channel = nl80211_get_channel,
2807 .frequency = nl80211_get_frequency,
2808 .frequency_offset = nl80211_get_frequency_offset,
2809 .txpower = nl80211_get_txpower,
2810 .txpower_offset = nl80211_get_txpower_offset,
2811 .bitrate = nl80211_get_bitrate,
2812 .signal = nl80211_get_signal,
2813 .noise = nl80211_get_noise,
2814 .quality = nl80211_get_quality,
2815 .quality_max = nl80211_get_quality_max,
2816 .mbssid_support = nl80211_get_mbssid_support,
2817 .hwmodelist = nl80211_get_hwmodelist,
2818 .htmodelist = nl80211_get_htmodelist,
2819 .mode = nl80211_get_mode,
2820 .ssid = nl80211_get_ssid,
2821 .bssid = nl80211_get_bssid,
2822 .country = nl80211_get_country,
2823 .hardware_id = nl80211_get_hardware_id,
2824 .hardware_name = nl80211_get_hardware_name,
2825 .encryption = nl80211_get_encryption,
2826 .phyname = nl80211_get_phyname,
2827 .assoclist = nl80211_get_assoclist,
2828 .txpwrlist = nl80211_get_txpwrlist,
2829 .scanlist = nl80211_get_scanlist,
2830 .freqlist = nl80211_get_freqlist,
2831 .countrylist = nl80211_get_countrylist,
2832 .lookup_phy = nl80211_lookup_phyname,
2833 .close = nl80211_close
2834 };
Library for accessing wireless device drivers