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add support for expected throughput
[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 snprintf(buf, sizeof(buf), "/sys/devices/platform/%s/ieee80211/*/index", opt); /**/
249
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 int nl80211_send(struct nl80211_msg_conveyor *cv,
373 int (*cb_func)(struct nl_msg *, void *),
374 void *cb_arg)
375 {
376 static struct nl80211_msg_conveyor rcv;
377 int err;
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 err = nl_send_auto_complete(nls->nl_sock, cv->msg);
385
386 if (err < 0)
387 goto out;
388
389 err = 1;
390
391 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
392 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
393 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
394
395 while (err > 0)
396 nl_recvmsgs(nls->nl_sock, cv->cb);
397
398 out:
399 nl80211_free(cv);
400 return err;
401 }
402
403 static int nl80211_request(const char *ifname, int cmd, int flags,
404 int (*cb_func)(struct nl_msg *, void *),
405 void *cb_arg)
406 {
407 struct nl80211_msg_conveyor *cv;
408
409 cv = nl80211_msg(ifname, cmd, flags);
410
411 if (!cv)
412 return -ENOMEM;
413
414 return nl80211_send(cv, cb_func, cb_arg);
415 }
416
417 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
418 {
419 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
420 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
421
422 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
423 genlmsg_attrlen(gnlh, 0), NULL);
424
425 return attr;
426 }
427
428 static int nl80211_get_protocol_features_cb(struct nl_msg *msg, void *arg)
429 {
430 uint32_t *features = arg;
431 struct nlattr **attr = nl80211_parse(msg);
432
433 if (attr[NL80211_ATTR_PROTOCOL_FEATURES])
434 *features = nla_get_u32(attr[NL80211_ATTR_PROTOCOL_FEATURES]);
435
436 return NL_SKIP;
437 }
438
439 static int nl80211_get_protocol_features(const char *ifname)
440 {
441 struct nl80211_msg_conveyor *req;
442 uint32_t features = 0;
443
444 req = nl80211_msg(ifname, NL80211_CMD_GET_PROTOCOL_FEATURES, 0);
445 if (req) {
446 nl80211_send(req, nl80211_get_protocol_features_cb, &features);
447 nl80211_free(req);
448 }
449
450 return features;
451 }
452
453 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
454 {
455 struct nl80211_group_conveyor *cv = arg;
456
457 struct nlattr **attr = nl80211_parse(msg);
458 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
459 struct nlattr *mgrp;
460 int mgrpidx;
461
462 if (!attr[CTRL_ATTR_MCAST_GROUPS])
463 return NL_SKIP;
464
465 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
466 {
467 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
468 nla_data(mgrp), nla_len(mgrp), NULL);
469
470 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
471 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
472 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
473 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
474 {
475 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
476 break;
477 }
478 }
479
480 return NL_SKIP;
481 }
482
483 static int nl80211_subscribe(const char *family, const char *group)
484 {
485 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
486 struct nl80211_msg_conveyor *req;
487 int err;
488
489 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
490 if (req)
491 {
492 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
493 err = nl80211_send(req, nl80211_subscribe_cb, &cv);
494
495 if (err)
496 return err;
497
498 return nl_socket_add_membership(nls->nl_sock, cv.id);
499
500 nla_put_failure:
501 nl80211_free(req);
502 }
503
504 return -ENOMEM;
505 }
506
507
508 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
509 {
510 struct nl80211_event_conveyor *cv = arg;
511 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
512
513 if (cv->wait[gnlh->cmd / 32] & (1 << (gnlh->cmd % 32)))
514 cv->recv = gnlh->cmd;
515
516 return NL_SKIP;
517 }
518
519 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
520 {
521 return NL_OK;
522 }
523
524 static int __nl80211_wait(const char *family, const char *group, ...)
525 {
526 struct nl80211_event_conveyor cv = { };
527 struct nl_cb *cb;
528 int err = 0;
529 int cmd;
530 va_list ap;
531
532 if (nl80211_subscribe(family, group))
533 return -ENOENT;
534
535 cb = nl_cb_alloc(NL_CB_DEFAULT);
536
537 if (!cb)
538 return -ENOMEM;
539
540 nl_cb_err(cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
541 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
542 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
543
544 va_start(ap, group);
545
546 for (cmd = va_arg(ap, int); cmd != 0; cmd = va_arg(ap, int))
547 cv.wait[cmd / 32] |= (1 << (cmd % 32));
548
549 va_end(ap);
550
551 while (!cv.recv && !err)
552 nl_recvmsgs(nls->nl_sock, cb);
553
554 nl_cb_put(cb);
555
556 return err;
557 }
558
559 #define nl80211_wait(family, group, ...) \
560 __nl80211_wait(family, group, __VA_ARGS__, 0)
561
562
563 static int nl80211_freq2channel(int freq)
564 {
565 if (freq == 2484)
566 return 14;
567 else if (freq < 2484)
568 return (freq - 2407) / 5;
569 else if (freq >= 4910 && freq <= 4980)
570 return (freq - 4000) / 5;
571 else
572 return (freq - 5000) / 5;
573 }
574
575 static int nl80211_channel2freq(int channel, const char *band)
576 {
577 if (!band || band[0] != 'a')
578 {
579 if (channel == 14)
580 return 2484;
581 else if (channel < 14)
582 return (channel * 5) + 2407;
583 }
584 else
585 {
586 if (channel >= 182 && channel <= 196)
587 return (channel * 5) + 4000;
588 else
589 return (channel * 5) + 5000;
590 }
591
592 return 0;
593 }
594
595 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
596 {
597 char *buf = arg;
598 struct nlattr **attr = nl80211_parse(msg);
599
600 if (attr[NL80211_ATTR_WIPHY_NAME])
601 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
602 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
603 else
604 buf[0] = 0;
605
606 return NL_SKIP;
607 }
608
609 static char * nl80211_ifname2phy(const char *ifname)
610 {
611 static char phy[32] = { 0 };
612
613 memset(phy, 0, sizeof(phy));
614
615 nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
616 nl80211_ifname2phy_cb, phy);
617
618 return phy[0] ? phy : NULL;
619 }
620
621 static char * nl80211_phy2ifname(const char *ifname)
622 {
623 int ifidx = -1, cifidx = -1, phyidx = -1;
624 char buffer[64];
625 static char nif[IFNAMSIZ] = { 0 };
626
627 DIR *d;
628 struct dirent *e;
629
630 /* Only accept phy name of the form phy%d or radio%d */
631 if (!ifname)
632 return NULL;
633 else if (!strncmp(ifname, "phy", 3))
634 phyidx = atoi(&ifname[3]);
635 else if (!strncmp(ifname, "radio", 5))
636 phyidx = nl80211_phy_idx_from_uci(ifname);
637 else
638 return NULL;
639
640 memset(nif, 0, sizeof(nif));
641
642 if (phyidx > -1)
643 {
644 if ((d = opendir("/sys/class/net")) != NULL)
645 {
646 while ((e = readdir(d)) != NULL)
647 {
648 snprintf(buffer, sizeof(buffer),
649 "/sys/class/net/%s/phy80211/index", e->d_name);
650
651 if (nl80211_readint(buffer) == phyidx)
652 {
653 snprintf(buffer, sizeof(buffer),
654 "/sys/class/net/%s/ifindex", e->d_name);
655
656 if ((cifidx = nl80211_readint(buffer)) >= 0 &&
657 ((ifidx < 0) || (cifidx < ifidx)))
658 {
659 ifidx = cifidx;
660 strncpy(nif, e->d_name, sizeof(nif) - 1);
661 }
662 }
663 }
664
665 closedir(d);
666 }
667 }
668
669 return nif[0] ? nif : NULL;
670 }
671
672 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
673 {
674 int *mode = arg;
675 struct nlattr **tb = nl80211_parse(msg);
676 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
677 IWINFO_OPMODE_UNKNOWN, /* unspecified */
678 IWINFO_OPMODE_ADHOC, /* IBSS */
679 IWINFO_OPMODE_CLIENT, /* managed */
680 IWINFO_OPMODE_MASTER, /* AP */
681 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
682 IWINFO_OPMODE_WDS, /* WDS */
683 IWINFO_OPMODE_MONITOR, /* monitor */
684 IWINFO_OPMODE_MESHPOINT, /* mesh point */
685 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
686 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
687 };
688
689 if (tb[NL80211_ATTR_IFTYPE])
690 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
691
692 return NL_SKIP;
693 }
694
695
696 static int nl80211_get_mode(const char *ifname, int *buf)
697 {
698 char *res;
699
700 *buf = IWINFO_OPMODE_UNKNOWN;
701
702 res = nl80211_phy2ifname(ifname);
703
704 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
705 nl80211_get_mode_cb, buf);
706
707 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
708 }
709
710 static int __nl80211_hostapd_query(const char *ifname, ...)
711 {
712 va_list ap, ap_cur;
713 char *phy, *search, *dest, *key, *val, buf[128];
714 int len, mode, found = 0, match = 1;
715 FILE *fp;
716
717 if (nl80211_get_mode(ifname, &mode))
718 return 0;
719
720 if (mode != IWINFO_OPMODE_MASTER && mode != IWINFO_OPMODE_AP_VLAN)
721 return 0;
722
723 phy = nl80211_ifname2phy(ifname);
724
725 if (!phy)
726 return 0;
727
728 snprintf(buf, sizeof(buf), "/var/run/hostapd-%s.conf", phy);
729 fp = fopen(buf, "r");
730
731 if (!fp)
732 return 0;
733
734 va_start(ap, ifname);
735
736 /* clear all destination buffers */
737 va_copy(ap_cur, ap);
738
739 while ((search = va_arg(ap_cur, char *)) != NULL)
740 {
741 dest = va_arg(ap_cur, char *);
742 len = va_arg(ap_cur, int);
743
744 memset(dest, 0, len);
745 }
746
747 va_end(ap_cur);
748
749 /* iterate applicable lines and copy found values into dest buffers */
750 while (fgets(buf, sizeof(buf), fp))
751 {
752 key = strtok(buf, " =\t\n");
753 val = strtok(NULL, "\n");
754
755 if (!key || !val || !*key || *key == '#')
756 continue;
757
758 if (!strcmp(key, "interface") || !strcmp(key, "bss"))
759 match = !strcmp(ifname, val);
760
761 if (!match)
762 continue;
763
764 va_copy(ap_cur, ap);
765
766 while ((search = va_arg(ap_cur, char *)) != NULL)
767 {
768 dest = va_arg(ap_cur, char *);
769 len = va_arg(ap_cur, int);
770
771 if (!strcmp(search, key))
772 {
773 strncpy(dest, val, len - 1);
774 found++;
775 break;
776 }
777 }
778
779 va_end(ap_cur);
780 }
781
782 fclose(fp);
783
784 va_end(ap);
785
786 return found;
787 }
788
789 #define nl80211_hostapd_query(ifname, ...) \
790 __nl80211_hostapd_query(ifname, ##__VA_ARGS__, NULL)
791
792
793 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
794 {
795 fd_set rfds;
796 struct timeval tv = { 0, 256000 };
797
798 FD_ZERO(&rfds);
799 FD_SET(sock, &rfds);
800
801 memset(buf, 0, blen);
802
803 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
804 return -1;
805
806 if (!FD_ISSET(sock, &rfds))
807 return -1;
808
809 return recv(sock, buf, blen - 1, 0);
810 }
811
812 static int nl80211_wpactl_connect(const char *ifname, struct sockaddr_un *local)
813 {
814 struct sockaddr_un remote = { 0 };
815 size_t remote_length, local_length;
816
817 int sock = socket(PF_UNIX, SOCK_DGRAM, 0);
818 if (sock < 0)
819 return sock;
820
821 remote.sun_family = AF_UNIX;
822 remote_length = sizeof(remote.sun_family) +
823 sprintf(remote.sun_path, "/var/run/wpa_supplicant-%s/%s",
824 ifname, ifname);
825
826 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
827 {
828 close(sock);
829 return -1;
830 }
831
832 if (connect(sock, (struct sockaddr *)&remote, remote_length))
833 {
834 remote_length = sizeof(remote.sun_family) +
835 sprintf(remote.sun_path, "/var/run/wpa_supplicant/%s", ifname);
836
837 if (connect(sock, (struct sockaddr *)&remote, remote_length))
838 {
839 close(sock);
840 return -1;
841 }
842 }
843
844 local->sun_family = AF_UNIX;
845 local_length = sizeof(local->sun_family) +
846 sprintf(local->sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
847
848 if (bind(sock, (struct sockaddr *)local, local_length) < 0)
849 {
850 close(sock);
851 return -1;
852 }
853
854 return sock;
855 }
856
857 static int __nl80211_wpactl_query(const char *ifname, ...)
858 {
859 va_list ap, ap_cur;
860 struct sockaddr_un local = { 0 };
861 int len, mode, found = 0, sock = -1;
862 char *search, *dest, *key, *val, *line, *pos, buf[512];
863
864 if (nl80211_get_mode(ifname, &mode))
865 return 0;
866
867 if (mode != IWINFO_OPMODE_CLIENT && mode != IWINFO_OPMODE_ADHOC)
868 return 0;
869
870 sock = nl80211_wpactl_connect(ifname, &local);
871
872 if (sock < 0)
873 return 0;
874
875 va_start(ap, ifname);
876
877 /* clear all destination buffers */
878 va_copy(ap_cur, ap);
879
880 while ((search = va_arg(ap_cur, char *)) != NULL)
881 {
882 dest = va_arg(ap_cur, char *);
883 len = va_arg(ap_cur, int);
884
885 memset(dest, 0, len);
886 }
887
888 va_end(ap_cur);
889
890 send(sock, "STATUS", 6, 0);
891
892 while (true)
893 {
894 if (nl80211_wpactl_recv(sock, buf, sizeof(buf)) <= 0)
895 break;
896
897 if (buf[0] == '<')
898 continue;
899
900 for (line = strtok_r(buf, "\n", &pos);
901 line != NULL;
902 line = strtok_r(NULL, "\n", &pos))
903 {
904 key = strtok(line, "=");
905 val = strtok(NULL, "\n");
906
907 if (!key || !val)
908 continue;
909
910 va_copy(ap_cur, ap);
911
912 while ((search = va_arg(ap_cur, char *)) != NULL)
913 {
914 dest = va_arg(ap_cur, char *);
915 len = va_arg(ap_cur, int);
916
917 if (!strcmp(search, key))
918 {
919 strncpy(dest, val, len - 1);
920 found++;
921 break;
922 }
923 }
924
925 va_end(ap_cur);
926 }
927
928 break;
929 }
930
931 va_end(ap);
932
933 close(sock);
934 unlink(local.sun_path);
935
936 return found;
937 }
938
939 #define nl80211_wpactl_query(ifname, ...) \
940 __nl80211_wpactl_query(ifname, ##__VA_ARGS__, NULL)
941
942
943 static char * nl80211_ifadd(const char *ifname)
944 {
945 char path[PATH_MAX];
946 static char nif[IFNAMSIZ] = { 0 };
947 struct nl80211_msg_conveyor *req;
948 FILE *sysfs;
949
950 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
951 if (req)
952 {
953 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
954
955 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
956 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
957
958 nl80211_send(req, NULL, NULL);
959
960 snprintf(path, sizeof(path) - 1,
961 "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif);
962
963 if ((sysfs = fopen(path, "w")) != NULL)
964 {
965 fwrite("0\n", 1, 2, sysfs);
966 fclose(sysfs);
967 }
968
969 return nif;
970
971 nla_put_failure:
972 nl80211_free(req);
973 }
974
975 return NULL;
976 }
977
978 static void nl80211_ifdel(const char *ifname)
979 {
980 struct nl80211_msg_conveyor *req;
981 int err;
982
983 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
984 if (req)
985 {
986 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
987
988 nl80211_send(req, NULL, NULL);
989 return;
990
991 nla_put_failure:
992 nl80211_free(req);
993 }
994 }
995
996 static void nl80211_hostapd_hup(const char *ifname)
997 {
998 int fd, pid = 0;
999 char buf[32];
1000 char *phy = nl80211_ifname2phy(ifname);
1001
1002 if (phy)
1003 {
1004 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
1005 if ((fd = open(buf, O_RDONLY)) >= 0)
1006 {
1007 if (read(fd, buf, sizeof(buf)) > 0)
1008 pid = atoi(buf);
1009
1010 close(fd);
1011 }
1012
1013 if (pid > 0)
1014 kill(pid, 1);
1015 }
1016 }
1017
1018
1019 static int nl80211_probe(const char *ifname)
1020 {
1021 return !!nl80211_ifname2phy(ifname);
1022 }
1023
1024 struct nl80211_ssid_bssid {
1025 unsigned char *ssid;
1026 unsigned char bssid[7];
1027 };
1028
1029 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
1030 {
1031 int ielen;
1032 unsigned char *ie;
1033 struct nl80211_ssid_bssid *sb = arg;
1034 struct nlattr **tb = nl80211_parse(msg);
1035 struct nlattr *bss[NL80211_BSS_MAX + 1];
1036
1037 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1038 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
1039 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1040 };
1041
1042 if (!tb[NL80211_ATTR_BSS] ||
1043 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1044 bss_policy) ||
1045 !bss[NL80211_BSS_BSSID] ||
1046 !bss[NL80211_BSS_STATUS] ||
1047 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
1048 {
1049 return NL_SKIP;
1050 }
1051
1052 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
1053 {
1054 case NL80211_BSS_STATUS_ASSOCIATED:
1055 case NL80211_BSS_STATUS_AUTHENTICATED:
1056 case NL80211_BSS_STATUS_IBSS_JOINED:
1057
1058 if (sb->ssid)
1059 {
1060 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1061 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1062
1063 while (ielen >= 2 && ielen >= ie[1])
1064 {
1065 if (ie[0] == 0)
1066 {
1067 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1068 return NL_SKIP;
1069 }
1070
1071 ielen -= ie[1] + 2;
1072 ie += ie[1] + 2;
1073 }
1074 }
1075 else
1076 {
1077 sb->bssid[0] = 1;
1078 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
1079 return NL_SKIP;
1080 }
1081
1082 default:
1083 return NL_SKIP;
1084 }
1085 }
1086
1087 static int nl80211_get_ssid(const char *ifname, char *buf)
1088 {
1089 char *res;
1090 struct nl80211_ssid_bssid sb = { .ssid = (unsigned char *)buf };
1091
1092 /* try to find ssid from scan dump results */
1093 res = nl80211_phy2ifname(ifname);
1094 sb.ssid[0] = 0;
1095
1096 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1097 nl80211_get_ssid_bssid_cb, &sb);
1098
1099 /* failed, try to find from hostapd info */
1100 if (sb.ssid[0] == 0)
1101 nl80211_hostapd_query(ifname, "ssid", sb.ssid,
1102 IWINFO_ESSID_MAX_SIZE + 1);
1103
1104 return (sb.ssid[0] == 0) ? -1 : 0;
1105 }
1106
1107 static int nl80211_get_bssid(const char *ifname, char *buf)
1108 {
1109 char *res, bssid[sizeof("FF:FF:FF:FF:FF:FF\0")];
1110 struct nl80211_ssid_bssid sb = { };
1111
1112 /* try to find bssid from scan dump results */
1113 res = nl80211_phy2ifname(ifname);
1114
1115 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1116 nl80211_get_ssid_bssid_cb, &sb);
1117
1118 /* failed, try to find mac from hostapd info */
1119 if ((sb.bssid[0] == 0) &&
1120 nl80211_hostapd_query(ifname, "bssid", bssid, sizeof(bssid)))
1121 {
1122 sb.bssid[0] = 1;
1123 sb.bssid[1] = strtol(&bssid[0], NULL, 16);
1124 sb.bssid[2] = strtol(&bssid[3], NULL, 16);
1125 sb.bssid[3] = strtol(&bssid[6], NULL, 16);
1126 sb.bssid[4] = strtol(&bssid[9], NULL, 16);
1127 sb.bssid[5] = strtol(&bssid[12], NULL, 16);
1128 sb.bssid[6] = strtol(&bssid[15], NULL, 16);
1129 }
1130
1131 if (sb.bssid[0])
1132 {
1133 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
1134 sb.bssid[1], sb.bssid[2], sb.bssid[3],
1135 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
1136
1137 return 0;
1138 }
1139
1140 return -1;
1141 }
1142
1143
1144 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
1145 {
1146 int *freq = arg;
1147 struct nlattr **attr = nl80211_parse(msg);
1148 struct nlattr *binfo[NL80211_BSS_MAX + 1];
1149
1150 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1151 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1152 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1153 };
1154
1155 if (attr[NL80211_ATTR_BSS] &&
1156 !nla_parse_nested(binfo, NL80211_BSS_MAX,
1157 attr[NL80211_ATTR_BSS], bss_policy))
1158 {
1159 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
1160 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
1161 }
1162
1163 return NL_SKIP;
1164 }
1165
1166 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
1167 {
1168 int *freq = arg;
1169 struct nlattr **tb = nl80211_parse(msg);
1170
1171 if (tb[NL80211_ATTR_WIPHY_FREQ])
1172 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
1173
1174 return NL_SKIP;
1175 }
1176
1177 static int nl80211_get_frequency(const char *ifname, int *buf)
1178 {
1179 char *res, channel[4], hwmode[2];
1180
1181 /* try to find frequency from interface info */
1182 res = nl80211_phy2ifname(ifname);
1183 *buf = 0;
1184
1185 nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1186 nl80211_get_frequency_info_cb, buf);
1187
1188 /* failed, try to find frequency from hostapd info */
1189 if ((*buf == 0) &&
1190 nl80211_hostapd_query(ifname, "hw_mode", hwmode, sizeof(hwmode),
1191 "channel", channel, sizeof(channel)) == 2)
1192 {
1193 *buf = nl80211_channel2freq(atoi(channel), hwmode);
1194 }
1195
1196 /* failed, try to find frequency from scan results */
1197 if (*buf == 0)
1198 {
1199 res = nl80211_phy2ifname(ifname);
1200
1201 nl80211_request(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
1202 nl80211_get_frequency_scan_cb, buf);
1203 }
1204
1205 return (*buf == 0) ? -1 : 0;
1206 }
1207
1208 static int nl80211_get_channel(const char *ifname, int *buf)
1209 {
1210 if (!nl80211_get_frequency(ifname, buf))
1211 {
1212 *buf = nl80211_freq2channel(*buf);
1213 return 0;
1214 }
1215
1216 return -1;
1217 }
1218
1219 static int nl80211_get_txpower_cb(struct nl_msg *msg, void *arg)
1220 {
1221 int *buf = arg;
1222 struct nlattr **tb = nl80211_parse(msg);
1223
1224 if (tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL])
1225 *buf = iwinfo_mbm2dbm(nla_get_u32(tb[NL80211_ATTR_WIPHY_TX_POWER_LEVEL]));
1226
1227 return NL_SKIP;
1228 }
1229
1230 static int nl80211_get_txpower(const char *ifname, int *buf)
1231 {
1232 char *res;
1233
1234 res = nl80211_phy2ifname(ifname);
1235 *buf = 0;
1236
1237 if (nl80211_request(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0,
1238 nl80211_get_txpower_cb, buf))
1239 return -1;
1240
1241 return 0;
1242 }
1243
1244
1245 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1246 {
1247 int8_t dbm;
1248 int16_t mbit;
1249 struct nl80211_rssi_rate *rr = arg;
1250 struct nlattr **attr = nl80211_parse(msg);
1251 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1252 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1253
1254 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1255 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1256 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1257 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1258 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1259 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1260 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1261 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1262 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1263 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1264 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1265 };
1266
1267 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1268 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1269 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1270 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1271 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1272 };
1273
1274 if (attr[NL80211_ATTR_STA_INFO])
1275 {
1276 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1277 attr[NL80211_ATTR_STA_INFO], stats_policy))
1278 {
1279 if (sinfo[NL80211_STA_INFO_SIGNAL])
1280 {
1281 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1282 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1283 }
1284
1285 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1286 {
1287 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1288 sinfo[NL80211_STA_INFO_TX_BITRATE],
1289 rate_policy))
1290 {
1291 if (rinfo[NL80211_RATE_INFO_BITRATE])
1292 {
1293 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1294 rr->rate = rr->rate
1295 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1296 }
1297 }
1298 }
1299 }
1300 }
1301
1302 return NL_SKIP;
1303 }
1304
1305 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1306 {
1307 DIR *d;
1308 struct dirent *de;
1309
1310 r->rssi = 0;
1311 r->rate = 0;
1312
1313 if ((d = opendir("/sys/class/net")) != NULL)
1314 {
1315 while ((de = readdir(d)) != NULL)
1316 {
1317 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1318 (!de->d_name[strlen(ifname)] ||
1319 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1320 {
1321 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
1322 NLM_F_DUMP, nl80211_fill_signal_cb, r);
1323 }
1324 }
1325
1326 closedir(d);
1327 }
1328 }
1329
1330 static int nl80211_get_bitrate(const char *ifname, int *buf)
1331 {
1332 struct nl80211_rssi_rate rr;
1333
1334 nl80211_fill_signal(ifname, &rr);
1335
1336 if (rr.rate)
1337 {
1338 *buf = (rr.rate * 100);
1339 return 0;
1340 }
1341
1342 return -1;
1343 }
1344
1345 static int nl80211_get_signal(const char *ifname, int *buf)
1346 {
1347 struct nl80211_rssi_rate rr;
1348
1349 nl80211_fill_signal(ifname, &rr);
1350
1351 if (rr.rssi)
1352 {
1353 *buf = rr.rssi;
1354 return 0;
1355 }
1356
1357 return -1;
1358 }
1359
1360 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1361 {
1362 int8_t *noise = arg;
1363 struct nlattr **tb = nl80211_parse(msg);
1364 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1365
1366 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1367 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1368 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1369 };
1370
1371 if (!tb[NL80211_ATTR_SURVEY_INFO])
1372 return NL_SKIP;
1373
1374 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1375 tb[NL80211_ATTR_SURVEY_INFO], sp))
1376 return NL_SKIP;
1377
1378 if (!si[NL80211_SURVEY_INFO_NOISE])
1379 return NL_SKIP;
1380
1381 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1382 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1383
1384 return NL_SKIP;
1385 }
1386
1387
1388 static int nl80211_get_noise(const char *ifname, int *buf)
1389 {
1390 int8_t noise = 0;
1391
1392 if (nl80211_request(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP,
1393 nl80211_get_noise_cb, &noise))
1394 goto out;
1395
1396 *buf = noise;
1397 return 0;
1398
1399 out:
1400 *buf = 0;
1401 return -1;
1402 }
1403
1404 static int nl80211_get_quality(const char *ifname, int *buf)
1405 {
1406 int signal;
1407
1408 if (!nl80211_get_signal(ifname, &signal))
1409 {
1410 /* A positive signal level is usually just a quality
1411 * value, pass through as-is */
1412 if (signal >= 0)
1413 {
1414 *buf = signal;
1415 }
1416
1417 /* The cfg80211 wext compat layer assumes a signal range
1418 * of -110 dBm to -40 dBm, the quality value is derived
1419 * by adding 110 to the signal level */
1420 else
1421 {
1422 if (signal < -110)
1423 signal = -110;
1424 else if (signal > -40)
1425 signal = -40;
1426
1427 *buf = (signal + 110);
1428 }
1429
1430 return 0;
1431 }
1432
1433 return -1;
1434 }
1435
1436 static int nl80211_get_quality_max(const char *ifname, int *buf)
1437 {
1438 /* The cfg80211 wext compat layer assumes a maximum
1439 * quality of 70 */
1440 *buf = 70;
1441
1442 return 0;
1443 }
1444
1445 static int nl80211_check_wepkey(const char *key)
1446 {
1447 if (key && *key)
1448 {
1449 switch (strlen(key))
1450 {
1451 case 5:
1452 case 10:
1453 return IWINFO_CIPHER_WEP40;
1454
1455 case 13:
1456 case 26:
1457 return IWINFO_CIPHER_WEP104;
1458 }
1459 }
1460
1461 return 0;
1462 }
1463
1464 static int nl80211_get_encryption(const char *ifname, char *buf)
1465 {
1466 char wpa[2], wpa_key_mgmt[16], wpa_pairwise[16], wpa_groupwise[16];
1467 char auth_algs[2], wep_key0[27], wep_key1[27], wep_key2[27], wep_key3[27];
1468
1469 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1470
1471 /* WPA supplicant */
1472 if (nl80211_wpactl_query(ifname,
1473 "pairwise_cipher", wpa_pairwise, sizeof(wpa_pairwise),
1474 "group_cipher", wpa_groupwise, sizeof(wpa_groupwise),
1475 "key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt)))
1476 {
1477 /* WEP */
1478 if (!strcmp(wpa_key_mgmt, "NONE"))
1479 {
1480 if (strstr(wpa_pairwise, "WEP-40"))
1481 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1482 else if (strstr(wpa_pairwise, "WEP-104"))
1483 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1484
1485 if (strstr(wpa_groupwise, "WEP-40"))
1486 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1487 else if (strstr(wpa_groupwise, "WEP-104"))
1488 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1489
1490 c->enabled = !!(c->pair_ciphers | c->group_ciphers);
1491 c->auth_suites |= IWINFO_KMGMT_NONE;
1492 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1493 }
1494
1495 /* WPA */
1496 else if (strstr(wpa_key_mgmt, "WPA"))
1497 {
1498 if (strstr(wpa_pairwise, "TKIP"))
1499 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1500 else if (strstr(wpa_pairwise, "CCMP"))
1501 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1502 else if (strstr(wpa_pairwise, "NONE"))
1503 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1504 else if (strstr(wpa_pairwise, "WEP-40"))
1505 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1506 else if (strstr(wpa_pairwise, "WEP-104"))
1507 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1508
1509 if (strstr(wpa_groupwise, "TKIP"))
1510 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1511 else if (strstr(wpa_groupwise, "CCMP"))
1512 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1513 else if (strstr(wpa_groupwise, "NONE"))
1514 c->group_ciphers |= IWINFO_CIPHER_NONE;
1515 else if (strstr(wpa_groupwise, "WEP-40"))
1516 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1517 else if (strstr(wpa_groupwise, "WEP-104"))
1518 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1519
1520 if (strstr(wpa_key_mgmt, "WPA2"))
1521 c->wpa_version = 2;
1522 else if (strstr(wpa_key_mgmt, "WPA"))
1523 c->wpa_version = 1;
1524
1525 if (strstr(wpa_key_mgmt, "PSK"))
1526 c->auth_suites |= IWINFO_KMGMT_PSK;
1527 else if (strstr(wpa_key_mgmt, "EAP") ||
1528 strstr(wpa_key_mgmt, "802.1X"))
1529 c->auth_suites |= IWINFO_KMGMT_8021x;
1530 else if (strstr(wpa_key_mgmt, "NONE"))
1531 c->auth_suites |= IWINFO_KMGMT_NONE;
1532
1533 c->enabled = !!(c->wpa_version && c->auth_suites);
1534 }
1535
1536 return 0;
1537 }
1538
1539 /* Hostapd */
1540 else if (nl80211_hostapd_query(ifname,
1541 "wpa", wpa, sizeof(wpa),
1542 "wpa_key_mgmt", wpa_key_mgmt, sizeof(wpa_key_mgmt),
1543 "wpa_pairwise", wpa_pairwise, sizeof(wpa_pairwise),
1544 "auth_algs", auth_algs, sizeof(auth_algs),
1545 "wep_key0", wep_key0, sizeof(wep_key0),
1546 "wep_key1", wep_key1, sizeof(wep_key1),
1547 "wep_key2", wep_key2, sizeof(wep_key2),
1548 "wep_key3", wep_key3, sizeof(wep_key3)))
1549 {
1550 c->wpa_version = wpa[0] ? atoi(wpa) : 0;
1551
1552 if (wpa_key_mgmt[0])
1553 {
1554 if (strstr(wpa_key_mgmt, "PSK"))
1555 c->auth_suites |= IWINFO_KMGMT_PSK;
1556
1557 if (strstr(wpa_key_mgmt, "EAP"))
1558 c->auth_suites |= IWINFO_KMGMT_8021x;
1559
1560 if (strstr(wpa_key_mgmt, "NONE"))
1561 c->auth_suites |= IWINFO_KMGMT_NONE;
1562 }
1563 else
1564 {
1565 c->auth_suites |= IWINFO_KMGMT_PSK;
1566 }
1567
1568 if (wpa_pairwise[0])
1569 {
1570 if (strstr(wpa_pairwise, "TKIP"))
1571 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1572
1573 if (strstr(wpa_pairwise, "CCMP"))
1574 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1575
1576 if (strstr(wpa_pairwise, "NONE"))
1577 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1578 }
1579
1580 if (auth_algs[0])
1581 {
1582 switch(atoi(auth_algs))
1583 {
1584 case 1:
1585 c->auth_algs |= IWINFO_AUTH_OPEN;
1586 break;
1587
1588 case 2:
1589 c->auth_algs |= IWINFO_AUTH_SHARED;
1590 break;
1591
1592 case 3:
1593 c->auth_algs |= IWINFO_AUTH_OPEN;
1594 c->auth_algs |= IWINFO_AUTH_SHARED;
1595 break;
1596 }
1597
1598 c->pair_ciphers |= nl80211_check_wepkey(wep_key0);
1599 c->pair_ciphers |= nl80211_check_wepkey(wep_key1);
1600 c->pair_ciphers |= nl80211_check_wepkey(wep_key2);
1601 c->pair_ciphers |= nl80211_check_wepkey(wep_key3);
1602 }
1603
1604 c->group_ciphers = c->pair_ciphers;
1605 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1606
1607 return 0;
1608 }
1609
1610 return -1;
1611 }
1612
1613 static int nl80211_get_phyname(const char *ifname, char *buf)
1614 {
1615 const char *name;
1616
1617 name = nl80211_ifname2phy(ifname);
1618
1619 if (name)
1620 {
1621 strcpy(buf, name);
1622 return 0;
1623 }
1624 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1625 {
1626 name = nl80211_ifname2phy(name);
1627
1628 if (name)
1629 {
1630 strcpy(buf, ifname);
1631 return 0;
1632 }
1633 }
1634
1635 return -1;
1636 }
1637
1638
1639 static void nl80211_parse_rateinfo(struct nlattr **ri,
1640 struct iwinfo_rate_entry *re)
1641 {
1642 if (ri[NL80211_RATE_INFO_BITRATE32])
1643 re->rate = nla_get_u32(ri[NL80211_RATE_INFO_BITRATE32]) * 100;
1644 else if (ri[NL80211_RATE_INFO_BITRATE])
1645 re->rate = nla_get_u16(ri[NL80211_RATE_INFO_BITRATE]) * 100;
1646
1647 if (ri[NL80211_RATE_INFO_VHT_MCS])
1648 {
1649 re->is_vht = 1;
1650 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_VHT_MCS]);
1651
1652 if (ri[NL80211_RATE_INFO_VHT_NSS])
1653 re->nss = nla_get_u8(ri[NL80211_RATE_INFO_VHT_NSS]);
1654 }
1655 else if (ri[NL80211_RATE_INFO_MCS])
1656 {
1657 re->is_ht = 1;
1658 re->mcs = nla_get_u8(ri[NL80211_RATE_INFO_MCS]);
1659 }
1660
1661 if (ri[NL80211_RATE_INFO_5_MHZ_WIDTH])
1662 re->mhz = 5;
1663 else if (ri[NL80211_RATE_INFO_10_MHZ_WIDTH])
1664 re->mhz = 10;
1665 else if (ri[NL80211_RATE_INFO_40_MHZ_WIDTH])
1666 re->mhz = 40;
1667 else if (ri[NL80211_RATE_INFO_80_MHZ_WIDTH])
1668 re->mhz = 80;
1669 else if (ri[NL80211_RATE_INFO_80P80_MHZ_WIDTH] ||
1670 ri[NL80211_RATE_INFO_160_MHZ_WIDTH])
1671 re->mhz = 160;
1672 else
1673 re->mhz = 20;
1674
1675 if (ri[NL80211_RATE_INFO_SHORT_GI])
1676 re->is_short_gi = 1;
1677
1678 re->is_40mhz = (re->mhz == 40);
1679 }
1680
1681 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1682 {
1683 struct nl80211_array_buf *arr = arg;
1684 struct iwinfo_assoclist_entry *e = arr->buf;
1685 struct nlattr **attr = nl80211_parse(msg);
1686 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1687 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1688 struct nl80211_sta_flag_update *sta_flags;
1689
1690 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1691 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1692 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1693 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1694 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1695 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1696 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1697 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1698 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1699 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 },
1700 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
1701 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 },
1702 [NL80211_STA_INFO_STA_FLAGS] =
1703 { .minlen = sizeof(struct nl80211_sta_flag_update) },
1704 [NL80211_STA_INFO_EXPECTED_THROUGHPUT] = { .type = NLA_U32 },
1705 };
1706
1707 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1708 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1709 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1710 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1711 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1712 };
1713
1714 /* advance to end of array */
1715 e += arr->count;
1716 memset(e, 0, sizeof(*e));
1717
1718 if (attr[NL80211_ATTR_MAC])
1719 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1720
1721 if (attr[NL80211_ATTR_STA_INFO] &&
1722 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1723 attr[NL80211_ATTR_STA_INFO], stats_policy))
1724 {
1725 if (sinfo[NL80211_STA_INFO_SIGNAL])
1726 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1727
1728 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1729 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1730
1731 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1732 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1733
1734 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1735 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1736
1737 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1738 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1739 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1740 nl80211_parse_rateinfo(rinfo, &e->rx_rate);
1741
1742 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1743 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1744 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1745 nl80211_parse_rateinfo(rinfo, &e->tx_rate);
1746
1747 if (sinfo[NL80211_STA_INFO_RX_BYTES])
1748 e->rx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]);
1749
1750 if (sinfo[NL80211_STA_INFO_TX_BYTES])
1751 e->tx_bytes = nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]);
1752
1753 if (sinfo[NL80211_STA_INFO_TX_RETRIES])
1754 e->tx_retries = nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]);
1755
1756 if (sinfo[NL80211_STA_INFO_TX_FAILED])
1757 e->tx_failed = nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]);
1758
1759 if (sinfo[NL80211_STA_INFO_T_OFFSET])
1760 e->t_offset = nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]);
1761
1762 if (sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT])
1763 e->thr = nla_get_u32(sinfo[NL80211_STA_INFO_EXPECTED_THROUGHPUT]);
1764
1765 /* Station flags */
1766 if (sinfo[NL80211_STA_INFO_STA_FLAGS])
1767 {
1768 sta_flags = (struct nl80211_sta_flag_update *)
1769 nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
1770
1771 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
1772 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
1773 e->is_authorized = 1;
1774
1775 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
1776 sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1777 e->is_authenticated = 1;
1778
1779 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) &&
1780 sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1781 e->is_preamble_short = 1;
1782
1783 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME) &&
1784 sta_flags->set & BIT(NL80211_STA_FLAG_WME))
1785 e->is_wme = 1;
1786
1787 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP) &&
1788 sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
1789 e->is_mfp = 1;
1790
1791 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
1792 sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1793 e->is_tdls = 1;
1794 }
1795 }
1796
1797 e->noise = 0; /* filled in by caller */
1798 arr->count++;
1799
1800 return NL_SKIP;
1801 }
1802
1803 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1804 {
1805 DIR *d;
1806 int i, noise = 0;
1807 struct dirent *de;
1808 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1809 struct iwinfo_assoclist_entry *e;
1810
1811 if ((d = opendir("/sys/class/net")) != NULL)
1812 {
1813 while ((de = readdir(d)) != NULL)
1814 {
1815 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1816 (!de->d_name[strlen(ifname)] ||
1817 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1818 {
1819 nl80211_request(de->d_name, NL80211_CMD_GET_STATION,
1820 NLM_F_DUMP, nl80211_get_assoclist_cb, &arr);
1821 }
1822 }
1823
1824 closedir(d);
1825
1826 if (!nl80211_get_noise(ifname, &noise))
1827 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1828 e->noise = noise;
1829
1830 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1831 return 0;
1832 }
1833
1834 return -1;
1835 }
1836
1837 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1838 {
1839 int *dbm_max = arg;
1840 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1841
1842 struct nlattr **attr = nl80211_parse(msg);
1843 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1844 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1845 struct nlattr *band, *freq;
1846
1847 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1848 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1849 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1850 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1851 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1852 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1853 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1854 };
1855
1856 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1857 *dbm_max = -1;
1858
1859 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1860 {
1861 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1862 nla_len(band), NULL);
1863
1864 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1865 {
1866 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1867 nla_data(freq), nla_len(freq), freq_policy);
1868
1869 ch_cmp = nl80211_freq2channel(nla_get_u32(
1870 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1871
1872 if ((!ch_cur || (ch_cmp == ch_cur)) &&
1873 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1874 {
1875 *dbm_max = (int)(0.01 * nla_get_u32(
1876 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1877
1878 break;
1879 }
1880 }
1881 }
1882
1883 return NL_SKIP;
1884 }
1885
1886 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1887 {
1888 int err, ch_cur;
1889 int dbm_max = -1, dbm_cur, dbm_cnt;
1890 struct nl80211_msg_conveyor *req;
1891 struct iwinfo_txpwrlist_entry entry;
1892
1893 if (nl80211_get_channel(ifname, &ch_cur))
1894 ch_cur = 0;
1895
1896 /* initialize the value pointer with channel for callback */
1897 dbm_max = ch_cur;
1898
1899 err = nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
1900 nl80211_get_txpwrlist_cb, &dbm_max);
1901
1902 if (!err)
1903 {
1904 for (dbm_cur = 0, dbm_cnt = 0;
1905 dbm_cur < dbm_max;
1906 dbm_cur++, dbm_cnt++)
1907 {
1908 entry.dbm = dbm_cur;
1909 entry.mw = iwinfo_dbm2mw(dbm_cur);
1910
1911 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1912 }
1913
1914 entry.dbm = dbm_max;
1915 entry.mw = iwinfo_dbm2mw(dbm_max);
1916
1917 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1918 dbm_cnt++;
1919
1920 *len = dbm_cnt * sizeof(entry);
1921 return 0;
1922 }
1923
1924 return -1;
1925 }
1926
1927 static void nl80211_get_scancrypto(const char *spec,
1928 struct iwinfo_crypto_entry *c)
1929 {
1930 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1931 {
1932 c->enabled = 1;
1933
1934 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1935 c->wpa_version = 3;
1936
1937 else if (strstr(spec, "WPA2"))
1938 c->wpa_version = 2;
1939
1940 else if (strstr(spec, "WPA"))
1941 c->wpa_version = 1;
1942
1943 else if (strstr(spec, "WEP"))
1944 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1945
1946
1947 if (strstr(spec, "PSK"))
1948 c->auth_suites |= IWINFO_KMGMT_PSK;
1949
1950 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1951 c->auth_suites |= IWINFO_KMGMT_8021x;
1952
1953 if (strstr(spec, "WPA-NONE"))
1954 c->auth_suites |= IWINFO_KMGMT_NONE;
1955
1956
1957 if (strstr(spec, "TKIP"))
1958 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1959
1960 if (strstr(spec, "CCMP"))
1961 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1962
1963 if (strstr(spec, "WEP-40"))
1964 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1965
1966 if (strstr(spec, "WEP-104"))
1967 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1968
1969 c->group_ciphers = c->pair_ciphers;
1970 }
1971 else
1972 {
1973 c->enabled = 0;
1974 }
1975 }
1976
1977
1978 struct nl80211_scanlist {
1979 struct iwinfo_scanlist_entry *e;
1980 int len;
1981 };
1982
1983
1984 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1985 struct iwinfo_scanlist_entry *e)
1986 {
1987 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1988 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1989 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1990 int len;
1991
1992 while (ielen >= 2 && ielen >= ie[1])
1993 {
1994 switch (ie[0])
1995 {
1996 case 0: /* SSID */
1997 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
1998 memcpy(e->ssid, ie + 2, len);
1999 e->ssid[len] = 0;
2000 break;
2001
2002 case 48: /* RSN */
2003 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
2004 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
2005 break;
2006
2007 case 221: /* Vendor */
2008 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
2009 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
2010 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
2011 break;
2012 }
2013
2014 ielen -= ie[1] + 2;
2015 ie += ie[1] + 2;
2016 }
2017 }
2018
2019 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
2020 {
2021 int8_t rssi;
2022 uint16_t caps;
2023
2024 struct nl80211_scanlist *sl = arg;
2025 struct nlattr **tb = nl80211_parse(msg);
2026 struct nlattr *bss[NL80211_BSS_MAX + 1];
2027
2028 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2029 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2030 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2031 [NL80211_BSS_BSSID] = { 0 },
2032 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2033 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2034 [NL80211_BSS_INFORMATION_ELEMENTS] = { 0 },
2035 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2036 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2037 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2038 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2039 [NL80211_BSS_BEACON_IES] = { 0 },
2040 };
2041
2042 if (!tb[NL80211_ATTR_BSS] ||
2043 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2044 bss_policy) ||
2045 !bss[NL80211_BSS_BSSID])
2046 {
2047 return NL_SKIP;
2048 }
2049
2050 if (bss[NL80211_BSS_CAPABILITY])
2051 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2052 else
2053 caps = 0;
2054
2055 memset(sl->e, 0, sizeof(*sl->e));
2056 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
2057
2058 if (caps & (1<<1))
2059 sl->e->mode = IWINFO_OPMODE_ADHOC;
2060 else if (caps & (1<<0))
2061 sl->e->mode = IWINFO_OPMODE_MASTER;
2062 else
2063 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
2064
2065 if (caps & (1<<4))
2066 sl->e->crypto.enabled = 1;
2067
2068 if (bss[NL80211_BSS_FREQUENCY])
2069 sl->e->channel = nl80211_freq2channel(nla_get_u32(
2070 bss[NL80211_BSS_FREQUENCY]));
2071
2072 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
2073 nl80211_get_scanlist_ie(bss, sl->e);
2074
2075 if (bss[NL80211_BSS_SIGNAL_MBM])
2076 {
2077 sl->e->signal =
2078 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
2079
2080 rssi = sl->e->signal - 0x100;
2081
2082 if (rssi < -110)
2083 rssi = -110;
2084 else if (rssi > -40)
2085 rssi = -40;
2086
2087 sl->e->quality = (rssi + 110);
2088 sl->e->quality_max = 70;
2089 }
2090
2091 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
2092 {
2093 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
2094 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
2095 }
2096
2097 sl->e++;
2098 sl->len++;
2099
2100 return NL_SKIP;
2101 }
2102
2103 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
2104 {
2105 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
2106
2107 if (nl80211_request(ifname, NL80211_CMD_TRIGGER_SCAN, 0, NULL, NULL))
2108 goto out;
2109
2110 if (nl80211_wait("nl80211", "scan",
2111 NL80211_CMD_NEW_SCAN_RESULTS, NL80211_CMD_SCAN_ABORTED))
2112 goto out;
2113
2114 if (nl80211_request(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP,
2115 nl80211_get_scanlist_cb, &sl))
2116 goto out;
2117
2118 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
2119 return 0;
2120
2121 out:
2122 *len = 0;
2123 return -1;
2124 }
2125
2126 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
2127 {
2128 #define hex(x) \
2129 (((x) >= 'a') ? ((x) - 'a' + 10) : \
2130 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0')))
2131
2132 int len = 0;
2133
2134 while (*in)
2135 {
2136 if (len + 1 >= outlen)
2137 break;
2138
2139 switch (*in)
2140 {
2141 case '\\':
2142 in++;
2143 switch (*in)
2144 {
2145 case 'n':
2146 out[len++] = '\n'; in++;
2147 break;
2148
2149 case 'r':
2150 out[len++] = '\r'; in++;
2151 break;
2152
2153 case 't':
2154 out[len++] = '\t'; in++;
2155 break;
2156
2157 case 'e':
2158 out[len++] = '\033'; in++;
2159 break;
2160
2161 case 'x':
2162 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
2163 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
2164 in += 3;
2165 break;
2166
2167 default:
2168 out[len++] = *in++;
2169 break;
2170 }
2171 break;
2172
2173 default:
2174 out[len++] = *in++;
2175 break;
2176 }
2177 }
2178
2179 if (outlen > len)
2180 out[len] = '\0';
2181
2182 return len;
2183 }
2184
2185 static int nl80211_get_scanlist_wpactl(const char *ifname, char *buf, int *len)
2186 {
2187 int sock, qmax, rssi, tries, count = -1, ready = 0;
2188 char *pos, *line, *bssid, *freq, *signal, *flags, *ssid, reply[4096];
2189 struct sockaddr_un local = { 0 };
2190 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
2191
2192 sock = nl80211_wpactl_connect(ifname, &local);
2193
2194 if (sock < 0)
2195 return sock;
2196
2197 send(sock, "ATTACH", 6, 0);
2198 send(sock, "SCAN", 4, 0);
2199
2200 /*
2201 * wait for scan results:
2202 * nl80211_wpactl_recv() will use a timeout of 256ms and we need to scan
2203 * 72 channels at most. We'll also receive two "OK" messages acknowledging
2204 * the "ATTACH" and "SCAN" commands and the driver might need a bit extra
2205 * time to process the results, so try 72 + 2 + 1 times.
2206 */
2207 for (tries = 0; tries < 75; tries++)
2208 {
2209 if (nl80211_wpactl_recv(sock, reply, sizeof(reply)) <= 0)
2210 continue;
2211
2212 /* got an event notification */
2213 if (reply[0] == '<')
2214 {
2215 /* scan results are ready */
2216 if (strstr(reply, "CTRL-EVENT-SCAN-RESULTS"))
2217 {
2218 /* send "SCAN_RESULTS" command */
2219 ready = (send(sock, "SCAN_RESULTS", 12, 0) == 12);
2220 break;
2221 }
2222
2223 /* is another unrelated event, retry */
2224 tries--;
2225 }
2226 }
2227
2228 /* receive and parse scan results if the wait above didn't time out */
2229 while (ready && nl80211_wpactl_recv(sock, reply, sizeof(reply)) > 0)
2230 {
2231 /* received an event notification, receive again */
2232 if (reply[0] == '<')
2233 continue;
2234
2235 nl80211_get_quality_max(ifname, &qmax);
2236
2237 for (line = strtok_r(reply, "\n", &pos);
2238 line != NULL;
2239 line = strtok_r(NULL, "\n", &pos))
2240 {
2241 /* skip header line */
2242 if (count < 0)
2243 {
2244 count++;
2245 continue;
2246 }
2247
2248 bssid = strtok(line, "\t");
2249 freq = strtok(NULL, "\t");
2250 signal = strtok(NULL, "\t");
2251 flags = strtok(NULL, "\t");
2252 ssid = strtok(NULL, "\n");
2253
2254 if (!bssid || !freq || !signal || !flags || !ssid)
2255 continue;
2256
2257 /* BSSID */
2258 e->mac[0] = strtol(&bssid[0], NULL, 16);
2259 e->mac[1] = strtol(&bssid[3], NULL, 16);
2260 e->mac[2] = strtol(&bssid[6], NULL, 16);
2261 e->mac[3] = strtol(&bssid[9], NULL, 16);
2262 e->mac[4] = strtol(&bssid[12], NULL, 16);
2263 e->mac[5] = strtol(&bssid[15], NULL, 16);
2264
2265 /* SSID */
2266 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2267
2268 /* Mode */
2269 if (strstr(flags, "[MESH]"))
2270 e->mode = IWINFO_OPMODE_MESHPOINT;
2271 else if (strstr(flags, "[IBSS]"))
2272 e->mode = IWINFO_OPMODE_ADHOC;
2273 else
2274 e->mode = IWINFO_OPMODE_MASTER;
2275
2276 /* Channel */
2277 e->channel = nl80211_freq2channel(atoi(freq));
2278
2279 /* Signal */
2280 rssi = atoi(signal);
2281 e->signal = rssi;
2282
2283 /* Quality */
2284 if (rssi < 0)
2285 {
2286 /* The cfg80211 wext compat layer assumes a signal range
2287 * of -110 dBm to -40 dBm, the quality value is derived
2288 * by adding 110 to the signal level */
2289 if (rssi < -110)
2290 rssi = -110;
2291 else if (rssi > -40)
2292 rssi = -40;
2293
2294 e->quality = (rssi + 110);
2295 }
2296 else
2297 {
2298 e->quality = rssi;
2299 }
2300
2301 /* Max. Quality */
2302 e->quality_max = qmax;
2303
2304 /* Crypto */
2305 nl80211_get_scancrypto(flags, &e->crypto);
2306
2307 count++;
2308 e++;
2309 }
2310
2311 *len = count * sizeof(struct iwinfo_scanlist_entry);
2312 break;
2313 }
2314
2315 close(sock);
2316 unlink(local.sun_path);
2317
2318 return (count >= 0) ? 0 : -1;
2319 }
2320
2321 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
2322 {
2323 char *res;
2324 int rv, mode;
2325
2326 *len = 0;
2327
2328 /* Got a radioX pseudo interface, find some interface on it or create one */
2329 if (!strncmp(ifname, "radio", 5))
2330 {
2331 /* Reuse existing interface */
2332 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2333 {
2334 return nl80211_get_scanlist(res, buf, len);
2335 }
2336
2337 /* Need to spawn a temporary iface for scanning */
2338 else if ((res = nl80211_ifadd(ifname)) != NULL)
2339 {
2340 rv = nl80211_get_scanlist(res, buf, len);
2341 nl80211_ifdel(res);
2342 return rv;
2343 }
2344 }
2345
2346 /* WPA supplicant */
2347 if (!nl80211_get_scanlist_wpactl(ifname, buf, len))
2348 {
2349 return 0;
2350 }
2351
2352 /* station / ad-hoc / monitor scan */
2353 else if (!nl80211_get_mode(ifname, &mode) &&
2354 (mode == IWINFO_OPMODE_ADHOC ||
2355 mode == IWINFO_OPMODE_MASTER ||
2356 mode == IWINFO_OPMODE_CLIENT ||
2357 mode == IWINFO_OPMODE_MONITOR) &&
2358 iwinfo_ifup(ifname))
2359 {
2360 return nl80211_get_scanlist_nl(ifname, buf, len);
2361 }
2362
2363 /* AP scan */
2364 else
2365 {
2366 /* Got a temp interface, don't create yet another one */
2367 if (!strncmp(ifname, "tmp.", 4))
2368 {
2369 if (!iwinfo_ifup(ifname))
2370 return -1;
2371
2372 rv = nl80211_get_scanlist_nl(ifname, buf, len);
2373 iwinfo_ifdown(ifname);
2374 return rv;
2375 }
2376
2377 /* Spawn a new scan interface */
2378 else
2379 {
2380 if (!(res = nl80211_ifadd(ifname)))
2381 return -1;
2382
2383 iwinfo_ifmac(res);
2384
2385 /* if we can take the new interface up, the driver supports an
2386 * additional interface and there's no need to tear down the ap */
2387 if (iwinfo_ifup(res))
2388 {
2389 rv = nl80211_get_scanlist_nl(res, buf, len);
2390 iwinfo_ifdown(res);
2391 }
2392
2393 /* driver cannot create secondary interface, take down ap
2394 * during scan */
2395 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2396 {
2397 rv = nl80211_get_scanlist_nl(res, buf, len);
2398 iwinfo_ifdown(res);
2399 iwinfo_ifup(ifname);
2400 nl80211_hostapd_hup(ifname);
2401 }
2402
2403 nl80211_ifdel(res);
2404 return rv;
2405 }
2406 }
2407
2408 return -1;
2409 }
2410
2411 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2412 {
2413 int bands_remain, freqs_remain;
2414
2415 struct nl80211_array_buf *arr = arg;
2416 struct iwinfo_freqlist_entry *e;
2417
2418 struct nlattr **attr = nl80211_parse(msg);
2419 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2420 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2421 struct nlattr *band, *freq;
2422
2423 e = arr->buf;
2424 e += arr->count;
2425
2426 if (attr[NL80211_ATTR_WIPHY_BANDS]) {
2427 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2428 {
2429 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2430 nla_data(band), nla_len(band), NULL);
2431
2432 if (bands[NL80211_BAND_ATTR_FREQS]) {
2433 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2434 {
2435 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2436 nla_data(freq), nla_len(freq), NULL);
2437
2438 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2439 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2440 continue;
2441
2442 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2443 e->channel = nl80211_freq2channel(e->mhz);
2444
2445 e->restricted = (
2446 freqs[NL80211_FREQUENCY_ATTR_NO_IR] &&
2447 !freqs[NL80211_FREQUENCY_ATTR_RADAR]
2448 ) ? 1 : 0;
2449
2450 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_MINUS])
2451 e->flags |= IWINFO_FREQ_NO_HT40MINUS;
2452 if (freqs[NL80211_FREQUENCY_ATTR_NO_HT40_PLUS])
2453 e->flags |= IWINFO_FREQ_NO_HT40PLUS;
2454 if (freqs[NL80211_FREQUENCY_ATTR_NO_80MHZ])
2455 e->flags |= IWINFO_FREQ_NO_80MHZ;
2456 if (freqs[NL80211_FREQUENCY_ATTR_NO_160MHZ])
2457 e->flags |= IWINFO_FREQ_NO_160MHZ;
2458 if (freqs[NL80211_FREQUENCY_ATTR_NO_20MHZ])
2459 e->flags |= IWINFO_FREQ_NO_20MHZ;
2460 if (freqs[NL80211_FREQUENCY_ATTR_NO_10MHZ])
2461 e->flags |= IWINFO_FREQ_NO_10MHZ;
2462
2463 e++;
2464 arr->count++;
2465 }
2466 }
2467 }
2468 }
2469
2470 return NL_SKIP;
2471 }
2472
2473 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2474 {
2475 struct nl80211_msg_conveyor *cv;
2476 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2477 uint32_t features = nl80211_get_protocol_features(ifname);
2478 int flags;
2479
2480 flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
2481 cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
2482 if (!cv)
2483 goto out;
2484
2485 NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
2486 if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr))
2487 goto out;
2488
2489 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2490 return 0;
2491
2492 nla_put_failure:
2493 nl80211_free(cv);
2494 out:
2495 *len = 0;
2496 return -1;
2497 }
2498
2499 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2500 {
2501 char *buf = arg;
2502 struct nlattr **attr = nl80211_parse(msg);
2503
2504 if (attr[NL80211_ATTR_REG_ALPHA2])
2505 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2506 else
2507 buf[0] = 0;
2508
2509 return NL_SKIP;
2510 }
2511
2512 static int nl80211_get_country(const char *ifname, char *buf)
2513 {
2514 if (nl80211_request(ifname, NL80211_CMD_GET_REG, 0,
2515 nl80211_get_country_cb, buf))
2516 return -1;
2517
2518 return 0;
2519 }
2520
2521 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2522 {
2523 int count;
2524 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2525 const struct iwinfo_iso3166_label *l;
2526
2527 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2528 {
2529 e->iso3166 = l->iso3166;
2530 e->ccode[0] = (l->iso3166 / 256);
2531 e->ccode[1] = (l->iso3166 % 256);
2532 e->ccode[2] = 0;
2533 }
2534
2535 *len = (count * sizeof(struct iwinfo_country_entry));
2536 return 0;
2537 }
2538
2539
2540 struct nl80211_modes
2541 {
2542 bool ok;
2543 uint32_t hw;
2544 uint32_t ht;
2545 };
2546
2547 static int nl80211_get_modelist_cb(struct nl_msg *msg, void *arg)
2548 {
2549 struct nl80211_modes *m = arg;
2550 int bands_remain, freqs_remain;
2551 uint16_t caps = 0;
2552 uint32_t vht_caps = 0;
2553 struct nlattr **attr = nl80211_parse(msg);
2554 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2555 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2556 struct nlattr *band, *freq;
2557
2558 if (attr[NL80211_ATTR_WIPHY_BANDS])
2559 {
2560 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2561 {
2562 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2563 nla_data(band), nla_len(band), NULL);
2564
2565 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2566 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2567
2568 /* Treat any nonzero capability as 11n */
2569 if (caps > 0)
2570 {
2571 m->hw |= IWINFO_80211_N;
2572 m->ht |= IWINFO_HTMODE_HT20;
2573
2574 if (caps & (1 << 1))
2575 m->ht |= IWINFO_HTMODE_HT40;
2576 }
2577
2578 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2579 freqs_remain)
2580 {
2581 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2582 nla_data(freq), nla_len(freq), NULL);
2583
2584 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2585 continue;
2586
2587 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2588 {
2589 m->hw |= IWINFO_80211_B;
2590 m->hw |= IWINFO_80211_G;
2591 }
2592 else if (bands[NL80211_BAND_ATTR_VHT_CAPA])
2593 {
2594 vht_caps = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
2595
2596 /* Treat any nonzero capability as 11ac */
2597 if (vht_caps > 0)
2598 {
2599 m->hw |= IWINFO_80211_AC;
2600 m->ht |= IWINFO_HTMODE_VHT20 | IWINFO_HTMODE_VHT40 | IWINFO_HTMODE_VHT80;
2601
2602 switch ((vht_caps >> 2) & 3)
2603 {
2604 case 2:
2605 m->ht |= IWINFO_HTMODE_VHT80_80;
2606 /* fall through */
2607
2608 case 1:
2609 m->ht |= IWINFO_HTMODE_VHT160;
2610 }
2611 }
2612 }
2613 else if (!(m->hw & IWINFO_80211_AC))
2614 {
2615 m->hw |= IWINFO_80211_A;
2616 }
2617 }
2618 }
2619
2620 m->ok = 1;
2621 }
2622
2623 return NL_SKIP;
2624 }
2625
2626 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
2627 {
2628 struct nl80211_modes m = { 0 };
2629
2630 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2631 nl80211_get_modelist_cb, &m))
2632 goto out;
2633
2634 if (!m.ok)
2635 goto out;
2636
2637 *buf = m.hw;
2638 return 0;
2639
2640 out:
2641 *buf = 0;
2642 return -1;
2643 }
2644
2645 static int nl80211_get_htmodelist(const char *ifname, int *buf)
2646 {
2647 struct nl80211_modes m = { 0 };
2648
2649 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2650 nl80211_get_modelist_cb, &m))
2651 goto out;
2652
2653 if (!m.ok)
2654 goto out;
2655
2656 *buf = m.ht;
2657 return 0;
2658
2659 out:
2660 *buf = 0;
2661 return -1;
2662 }
2663
2664
2665 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
2666 {
2667 struct nlattr **attr = nl80211_parse(msg);
2668 struct nlattr *comb;
2669 int *ret = arg;
2670 int comb_rem, limit_rem, mode_rem;
2671
2672 *ret = 0;
2673 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
2674 return NL_SKIP;
2675
2676 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
2677 {
2678 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
2679 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
2680 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
2681 };
2682 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB+1];
2683 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
2684 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
2685 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
2686 };
2687 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT+1];
2688 struct nlattr *limit;
2689
2690 nla_parse_nested(tb_comb, NUM_NL80211_IFACE_COMB, comb, iface_combination_policy);
2691
2692 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
2693 continue;
2694
2695 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
2696 {
2697 struct nlattr *mode;
2698
2699 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
2700
2701 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
2702 !tb_limit[NL80211_IFACE_LIMIT_MAX])
2703 continue;
2704
2705 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
2706 continue;
2707
2708 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
2709 if (nla_type(mode) == NL80211_IFTYPE_AP)
2710 *ret = 1;
2711 }
2712 }
2713 }
2714
2715 return NL_SKIP;
2716 }
2717
2718 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
2719 {
2720 if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
2721 nl80211_get_ifcomb_cb, buf))
2722 return -1;
2723
2724 return 0;
2725 }
2726
2727 static int nl80211_get_hardware_id(const char *ifname, char *buf)
2728 {
2729 int rv = -1;
2730 char *res;
2731
2732 /* Got a radioX pseudo interface, find some interface on it or create one */
2733 if (!strncmp(ifname, "radio", 5))
2734 {
2735 /* Reuse existing interface */
2736 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2737 {
2738 rv = wext_ops.hardware_id(res, buf);
2739 }
2740
2741 /* Need to spawn a temporary iface for finding IDs */
2742 else if ((res = nl80211_ifadd(ifname)) != NULL)
2743 {
2744 rv = wext_ops.hardware_id(res, buf);
2745 nl80211_ifdel(res);
2746 }
2747 }
2748 else
2749 {
2750 rv = wext_ops.hardware_id(ifname, buf);
2751 }
2752
2753 /* Failed to obtain hardware IDs, search board config */
2754 if (rv)
2755 {
2756 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2757 }
2758
2759 return rv;
2760 }
2761
2762 static const struct iwinfo_hardware_entry *
2763 nl80211_get_hardware_entry(const char *ifname)
2764 {
2765 struct iwinfo_hardware_id id;
2766
2767 if (nl80211_get_hardware_id(ifname, (char *)&id))
2768 return NULL;
2769
2770 return iwinfo_hardware(&id);
2771 }
2772
2773 static int nl80211_get_hardware_name(const char *ifname, char *buf)
2774 {
2775 const struct iwinfo_hardware_entry *hw;
2776
2777 if (!(hw = nl80211_get_hardware_entry(ifname)))
2778 sprintf(buf, "Generic MAC80211");
2779 else
2780 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2781
2782 return 0;
2783 }
2784
2785 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
2786 {
2787 const struct iwinfo_hardware_entry *hw;
2788
2789 if (!(hw = nl80211_get_hardware_entry(ifname)))
2790 return -1;
2791
2792 *buf = hw->txpower_offset;
2793 return 0;
2794 }
2795
2796 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
2797 {
2798 const struct iwinfo_hardware_entry *hw;
2799
2800 if (!(hw = nl80211_get_hardware_entry(ifname)))
2801 return -1;
2802
2803 *buf = hw->frequency_offset;
2804 return 0;
2805 }
2806
2807 static int nl80211_lookup_phyname(const char *section, char *buf)
2808 {
2809 int idx;
2810
2811 if ((idx = nl80211_phy_idx_from_uci(section)) < 0)
2812 return -1;
2813
2814 sprintf(buf, "phy%d", idx);
2815 return 0;
2816 }
2817
2818 const struct iwinfo_ops nl80211_ops = {
2819 .name = "nl80211",
2820 .probe = nl80211_probe,
2821 .channel = nl80211_get_channel,
2822 .frequency = nl80211_get_frequency,
2823 .frequency_offset = nl80211_get_frequency_offset,
2824 .txpower = nl80211_get_txpower,
2825 .txpower_offset = nl80211_get_txpower_offset,
2826 .bitrate = nl80211_get_bitrate,
2827 .signal = nl80211_get_signal,
2828 .noise = nl80211_get_noise,
2829 .quality = nl80211_get_quality,
2830 .quality_max = nl80211_get_quality_max,
2831 .mbssid_support = nl80211_get_mbssid_support,
2832 .hwmodelist = nl80211_get_hwmodelist,
2833 .htmodelist = nl80211_get_htmodelist,
2834 .mode = nl80211_get_mode,
2835 .ssid = nl80211_get_ssid,
2836 .bssid = nl80211_get_bssid,
2837 .country = nl80211_get_country,
2838 .hardware_id = nl80211_get_hardware_id,
2839 .hardware_name = nl80211_get_hardware_name,
2840 .encryption = nl80211_get_encryption,
2841 .phyname = nl80211_get_phyname,
2842 .assoclist = nl80211_get_assoclist,
2843 .txpwrlist = nl80211_get_txpwrlist,
2844 .scanlist = nl80211_get_scanlist,
2845 .freqlist = nl80211_get_freqlist,
2846 .countrylist = nl80211_get_countrylist,
2847 .lookup_phy = nl80211_lookup_phyname,
2848 .close = nl80211_close
2849 };
Library for accessing wireless device drivers