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nl80211: Make get_ssid behave like get_bssid with SME
[thirdparty/hostap.git] / src / drivers / driver_nl80211.c
1 /*
2 * WPA Supplicant - driver interaction with Linux nl80211/cfg80211
3 * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15 #include "includes.h"
16 #include <sys/ioctl.h>
17 #include <net/if_arp.h>
18 #include <netlink/genl/genl.h>
19 #include <netlink/genl/family.h>
20 #include <netlink/genl/ctrl.h>
21 #include "nl80211_copy.h"
22 #include "wireless_copy.h"
23
24 #include "common.h"
25 #include "driver.h"
26 #include "eloop.h"
27 #include "ieee802_11_defs.h"
28
29 #ifndef IFF_LOWER_UP
30 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
31 #endif
32 #ifndef IFF_DORMANT
33 #define IFF_DORMANT 0x20000 /* driver signals dormant */
34 #endif
35
36 #ifndef IF_OPER_DORMANT
37 #define IF_OPER_DORMANT 5
38 #endif
39 #ifndef IF_OPER_UP
40 #define IF_OPER_UP 6
41 #endif
42
43
44 #ifndef NO_WEXT_COMPAT
45 /*
46 * Fall back to WEXT association, if the kernel does not support nl80211 MLME
47 * commands. This is temporary backwards compatibility version that will be
48 * removed at some point.
49 */
50 #define WEXT_COMPAT
51 #endif /* NO_WEXT_COMPAT */
52
53
54 struct wpa_driver_nl80211_data {
55 void *ctx;
56 int wext_event_sock;
57 int ioctl_sock;
58 char ifname[IFNAMSIZ + 1];
59 int ifindex;
60 int if_removed;
61 struct wpa_driver_capa capa;
62 int has_capability;
63 int we_version_compiled;
64
65 #ifdef WEXT_COMPAT
66 u8 *assoc_req_ies;
67 size_t assoc_req_ies_len;
68 u8 *assoc_resp_ies;
69 size_t assoc_resp_ies_len;
70
71 /* for set_auth_alg fallback */
72 int use_crypt;
73 int auth_alg_fallback;
74 #endif /* WEXT_COMPAT */
75
76 int operstate;
77
78 char mlmedev[IFNAMSIZ + 1];
79
80 int scan_complete_events;
81
82 struct nl_handle *nl_handle;
83 struct nl_cache *nl_cache;
84 struct nl_cb *nl_cb;
85 struct genl_family *nl80211;
86
87 u8 bssid[ETH_ALEN];
88 int associated;
89 u8 ssid[32];
90 size_t ssid_len;
91 };
92
93
94 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
95 void *timeout_ctx);
96 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
97 #ifdef WEXT_COMPAT
98 static int wpa_driver_nl80211_flush_pmkid(void *priv);
99 #endif /* WEXT_COMPAT */
100 static int wpa_driver_nl80211_get_range(void *priv);
101 static int
102 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
103
104
105 /* nl80211 code */
106 static int ack_handler(struct nl_msg *msg, void *arg)
107 {
108 int *err = arg;
109 *err = 0;
110 return NL_STOP;
111 }
112
113 static int finish_handler(struct nl_msg *msg, void *arg)
114 {
115 int *ret = arg;
116 *ret = 0;
117 return NL_SKIP;
118 }
119
120 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
121 void *arg)
122 {
123 int *ret = arg;
124 *ret = err->error;
125 return NL_SKIP;
126 }
127
128 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
129 struct nl_msg *msg,
130 int (*valid_handler)(struct nl_msg *, void *),
131 void *valid_data)
132 {
133 struct nl_cb *cb;
134 int err = -ENOMEM;
135
136 cb = nl_cb_clone(drv->nl_cb);
137 if (!cb)
138 goto out;
139
140 err = nl_send_auto_complete(drv->nl_handle, msg);
141 if (err < 0)
142 goto out;
143
144 err = 1;
145
146 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
147 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
148 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
149
150 if (valid_handler)
151 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
152 valid_handler, valid_data);
153
154 while (err > 0)
155 nl_recvmsgs(drv->nl_handle, cb);
156 out:
157 nl_cb_put(cb);
158 nlmsg_free(msg);
159 return err;
160 }
161
162
163 struct family_data {
164 const char *group;
165 int id;
166 };
167
168
169 static int family_handler(struct nl_msg *msg, void *arg)
170 {
171 struct family_data *res = arg;
172 struct nlattr *tb[CTRL_ATTR_MAX + 1];
173 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
174 struct nlattr *mcgrp;
175 int i;
176
177 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
178 genlmsg_attrlen(gnlh, 0), NULL);
179 if (!tb[CTRL_ATTR_MCAST_GROUPS])
180 return NL_SKIP;
181
182 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
183 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
184 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
185 nla_len(mcgrp), NULL);
186 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
187 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
188 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
189 res->group,
190 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
191 continue;
192 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
193 break;
194 };
195
196 return NL_SKIP;
197 }
198
199
200 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
201 const char *family, const char *group)
202 {
203 struct nl_msg *msg;
204 int ret = -1;
205 struct family_data res = { group, -ENOENT };
206
207 msg = nlmsg_alloc();
208 if (!msg)
209 return -ENOMEM;
210 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
211 0, 0, CTRL_CMD_GETFAMILY, 0);
212 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
213
214 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
215 msg = NULL;
216 if (ret == 0)
217 ret = res.id;
218
219 nla_put_failure:
220 nlmsg_free(msg);
221 return ret;
222 }
223
224
225 static int wpa_driver_nl80211_send_oper_ifla(
226 struct wpa_driver_nl80211_data *drv,
227 int linkmode, int operstate)
228 {
229 struct {
230 struct nlmsghdr hdr;
231 struct ifinfomsg ifinfo;
232 char opts[16];
233 } req;
234 struct rtattr *rta;
235 static int nl_seq;
236 ssize_t ret;
237
238 os_memset(&req, 0, sizeof(req));
239
240 req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
241 req.hdr.nlmsg_type = RTM_SETLINK;
242 req.hdr.nlmsg_flags = NLM_F_REQUEST;
243 req.hdr.nlmsg_seq = ++nl_seq;
244 req.hdr.nlmsg_pid = 0;
245
246 req.ifinfo.ifi_family = AF_UNSPEC;
247 req.ifinfo.ifi_type = 0;
248 req.ifinfo.ifi_index = drv->ifindex;
249 req.ifinfo.ifi_flags = 0;
250 req.ifinfo.ifi_change = 0;
251
252 if (linkmode != -1) {
253 rta = (struct rtattr *)
254 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
255 rta->rta_type = IFLA_LINKMODE;
256 rta->rta_len = RTA_LENGTH(sizeof(char));
257 *((char *) RTA_DATA(rta)) = linkmode;
258 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
259 RTA_LENGTH(sizeof(char));
260 }
261 if (operstate != -1) {
262 rta = (struct rtattr *)
263 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
264 rta->rta_type = IFLA_OPERSTATE;
265 rta->rta_len = RTA_LENGTH(sizeof(char));
266 *((char *) RTA_DATA(rta)) = operstate;
267 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
268 RTA_LENGTH(sizeof(char));
269 }
270
271 wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
272 linkmode, operstate);
273
274 ret = send(drv->wext_event_sock, &req, req.hdr.nlmsg_len, 0);
275 if (ret < 0) {
276 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
277 "%s (assume operstate is not supported)",
278 strerror(errno));
279 }
280
281 return ret < 0 ? -1 : 0;
282 }
283
284
285 static int wpa_driver_nl80211_set_auth_param(
286 struct wpa_driver_nl80211_data *drv, int idx, u32 value)
287 {
288 struct iwreq iwr;
289 int ret = 0;
290
291 os_memset(&iwr, 0, sizeof(iwr));
292 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
293 iwr.u.param.flags = idx & IW_AUTH_INDEX;
294 iwr.u.param.value = value;
295
296 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
297 if (errno != EOPNOTSUPP) {
298 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
299 "value 0x%x) failed: %s)",
300 idx, value, strerror(errno));
301 }
302 ret = errno == EOPNOTSUPP ? -2 : -1;
303 }
304
305 return ret;
306 }
307
308
309 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
310 {
311 struct wpa_driver_nl80211_data *drv = priv;
312 #ifdef WEXT_COMPAT
313 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
314 struct iwreq iwr;
315 int ret = 0;
316
317 os_memset(&iwr, 0, sizeof(iwr));
318 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
319
320 if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
321 perror("ioctl[SIOCGIWAP]");
322 ret = -1;
323 }
324 os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
325
326 return ret;
327 }
328 #endif /* WEXT_COMPAT */
329 if (!drv->associated)
330 return -1;
331 os_memcpy(bssid, drv->bssid, ETH_ALEN);
332 return 0;
333 }
334
335
336 #ifdef WEXT_COMPAT
337 static int wpa_driver_nl80211_set_bssid(void *priv, const u8 *bssid)
338 {
339 struct wpa_driver_nl80211_data *drv = priv;
340 struct iwreq iwr;
341 int ret = 0;
342
343 os_memset(&iwr, 0, sizeof(iwr));
344 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
345 iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
346 if (bssid)
347 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
348 else
349 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
350
351 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
352 perror("ioctl[SIOCSIWAP]");
353 ret = -1;
354 }
355
356 return ret;
357 }
358 #endif /* WEXT_COMPAT */
359
360
361 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
362 {
363 struct wpa_driver_nl80211_data *drv = priv;
364 #ifdef WEXT_COMPAT
365 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
366 struct iwreq iwr;
367 int ret = 0;
368
369 os_memset(&iwr, 0, sizeof(iwr));
370 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
371 iwr.u.essid.pointer = (caddr_t) ssid;
372 iwr.u.essid.length = 32;
373
374 if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
375 perror("ioctl[SIOCGIWESSID]");
376 ret = -1;
377 } else {
378 ret = iwr.u.essid.length;
379 if (ret > 32)
380 ret = 32;
381 /*
382 * Some drivers include nul termination in the SSID, so
383 * let's remove it here before further processing.
384 * WE-21 changes this to explicitly require the length
385 * _not_ to include nul termination.
386 */
387 if (ret > 0 && ssid[ret - 1] == '\0' &&
388 drv->we_version_compiled < 21)
389 ret--;
390 }
391
392 return ret;
393 }
394 #endif /* WEXT_COMPAT */
395 if (!drv->associated)
396 return -1;
397 os_memcpy(ssid, drv->ssid, drv->ssid_len);
398 return drv->ssid_len;
399 }
400
401
402 #ifdef WEXT_COMPAT
403 static int wpa_driver_nl80211_set_ssid(void *priv, const u8 *ssid,
404 size_t ssid_len)
405 {
406 struct wpa_driver_nl80211_data *drv = priv;
407 struct iwreq iwr;
408 int ret = 0;
409 char buf[33];
410
411 if (ssid_len > 32)
412 return -1;
413
414 os_memset(&iwr, 0, sizeof(iwr));
415 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
416 /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
417 iwr.u.essid.flags = (ssid_len != 0);
418 os_memset(buf, 0, sizeof(buf));
419 os_memcpy(buf, ssid, ssid_len);
420 iwr.u.essid.pointer = (caddr_t) buf;
421 if (drv->we_version_compiled < 21) {
422 /* For historic reasons, set SSID length to include one extra
423 * character, C string nul termination, even though SSID is
424 * really an octet string that should not be presented as a C
425 * string. Some Linux drivers decrement the length by one and
426 * can thus end up missing the last octet of the SSID if the
427 * length is not incremented here. WE-21 changes this to
428 * explicitly require the length _not_ to include nul
429 * termination. */
430 if (ssid_len)
431 ssid_len++;
432 }
433 iwr.u.essid.length = ssid_len;
434
435 if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
436 perror("ioctl[SIOCSIWESSID]");
437 ret = -1;
438 }
439
440 return ret;
441 }
442
443
444 static int wpa_driver_nl80211_set_freq(void *priv, int freq)
445 {
446 struct wpa_driver_nl80211_data *drv = priv;
447 struct iwreq iwr;
448 int ret = 0;
449
450 os_memset(&iwr, 0, sizeof(iwr));
451 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
452 iwr.u.freq.m = freq * 100000;
453 iwr.u.freq.e = 1;
454
455 if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
456 perror("ioctl[SIOCSIWFREQ]");
457 ret = -1;
458 }
459
460 return ret;
461 }
462
463
464 static void
465 wpa_driver_nl80211_event_wireless_custom(void *ctx, char *custom)
466 {
467 union wpa_event_data data;
468
469 wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
470 custom);
471
472 os_memset(&data, 0, sizeof(data));
473 /* Host AP driver */
474 if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
475 data.michael_mic_failure.unicast =
476 os_strstr(custom, " unicast ") != NULL;
477 /* TODO: parse parameters(?) */
478 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
479 } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
480 char *spos;
481 int bytes;
482
483 spos = custom + 17;
484
485 bytes = strspn(spos, "0123456789abcdefABCDEF");
486 if (!bytes || (bytes & 1))
487 return;
488 bytes /= 2;
489
490 data.assoc_info.req_ies = os_malloc(bytes);
491 if (data.assoc_info.req_ies == NULL)
492 return;
493
494 data.assoc_info.req_ies_len = bytes;
495 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
496
497 spos += bytes * 2;
498
499 data.assoc_info.resp_ies = NULL;
500 data.assoc_info.resp_ies_len = 0;
501
502 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
503 spos += 9;
504
505 bytes = strspn(spos, "0123456789abcdefABCDEF");
506 if (!bytes || (bytes & 1))
507 goto done;
508 bytes /= 2;
509
510 data.assoc_info.resp_ies = os_malloc(bytes);
511 if (data.assoc_info.resp_ies == NULL)
512 goto done;
513
514 data.assoc_info.resp_ies_len = bytes;
515 hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
516 }
517
518 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
519
520 done:
521 os_free(data.assoc_info.resp_ies);
522 os_free(data.assoc_info.req_ies);
523 #ifdef CONFIG_PEERKEY
524 } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
525 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
526 wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
527 "STKSTART.request '%s'", custom + 17);
528 return;
529 }
530 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
531 #endif /* CONFIG_PEERKEY */
532 }
533 }
534 #endif /* WEXT_COMPAT */
535
536
537 static int wpa_driver_nl80211_event_wireless_michaelmicfailure(
538 void *ctx, const char *ev, size_t len)
539 {
540 const struct iw_michaelmicfailure *mic;
541 union wpa_event_data data;
542
543 if (len < sizeof(*mic))
544 return -1;
545
546 mic = (const struct iw_michaelmicfailure *) ev;
547
548 wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
549 "flags=0x%x src_addr=" MACSTR, mic->flags,
550 MAC2STR(mic->src_addr.sa_data));
551
552 os_memset(&data, 0, sizeof(data));
553 data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
554 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
555
556 return 0;
557 }
558
559
560 #ifdef WEXT_COMPAT
561 static int wpa_driver_nl80211_event_wireless_pmkidcand(
562 struct wpa_driver_nl80211_data *drv, const char *ev, size_t len)
563 {
564 const struct iw_pmkid_cand *cand;
565 union wpa_event_data data;
566 const u8 *addr;
567
568 if (len < sizeof(*cand))
569 return -1;
570
571 cand = (const struct iw_pmkid_cand *) ev;
572 addr = (const u8 *) cand->bssid.sa_data;
573
574 wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
575 "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
576 cand->index, MAC2STR(addr));
577
578 os_memset(&data, 0, sizeof(data));
579 os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
580 data.pmkid_candidate.index = cand->index;
581 data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
582 wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
583
584 return 0;
585 }
586
587
588 static int wpa_driver_nl80211_event_wireless_assocreqie(
589 struct wpa_driver_nl80211_data *drv, const char *ev, int len)
590 {
591 if (len < 0)
592 return -1;
593
594 wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
595 len);
596 os_free(drv->assoc_req_ies);
597 drv->assoc_req_ies = os_malloc(len);
598 if (drv->assoc_req_ies == NULL) {
599 drv->assoc_req_ies_len = 0;
600 return -1;
601 }
602 os_memcpy(drv->assoc_req_ies, ev, len);
603 drv->assoc_req_ies_len = len;
604
605 return 0;
606 }
607
608
609 static int wpa_driver_nl80211_event_wireless_assocrespie(
610 struct wpa_driver_nl80211_data *drv, const char *ev, int len)
611 {
612 if (len < 0)
613 return -1;
614
615 wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
616 len);
617 os_free(drv->assoc_resp_ies);
618 drv->assoc_resp_ies = os_malloc(len);
619 if (drv->assoc_resp_ies == NULL) {
620 drv->assoc_resp_ies_len = 0;
621 return -1;
622 }
623 os_memcpy(drv->assoc_resp_ies, ev, len);
624 drv->assoc_resp_ies_len = len;
625
626 return 0;
627 }
628
629
630 static void wpa_driver_nl80211_event_assoc_ies(struct wpa_driver_nl80211_data *drv)
631 {
632 union wpa_event_data data;
633
634 if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
635 return;
636
637 os_memset(&data, 0, sizeof(data));
638 if (drv->assoc_req_ies) {
639 data.assoc_info.req_ies = drv->assoc_req_ies;
640 drv->assoc_req_ies = NULL;
641 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
642 }
643 if (drv->assoc_resp_ies) {
644 data.assoc_info.resp_ies = drv->assoc_resp_ies;
645 drv->assoc_resp_ies = NULL;
646 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
647 }
648
649 wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
650
651 os_free(data.assoc_info.req_ies);
652 os_free(data.assoc_info.resp_ies);
653 }
654 #endif /* WEXT_COMPAT */
655
656
657 static void wpa_driver_nl80211_event_wireless(struct wpa_driver_nl80211_data *drv,
658 void *ctx, char *data, int len)
659 {
660 struct iw_event iwe_buf, *iwe = &iwe_buf;
661 char *pos, *end, *custom;
662 #ifdef WEXT_COMPAT
663 char *buf;
664 #endif /* WEXT_COMPAT */
665
666 pos = data;
667 end = data + len;
668
669 while (pos + IW_EV_LCP_LEN <= end) {
670 /* Event data may be unaligned, so make a local, aligned copy
671 * before processing. */
672 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
673 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
674 iwe->cmd, iwe->len);
675 if (iwe->len <= IW_EV_LCP_LEN)
676 return;
677
678 custom = pos + IW_EV_POINT_LEN;
679 if (drv->we_version_compiled > 18 &&
680 (iwe->cmd == IWEVMICHAELMICFAILURE ||
681 iwe->cmd == IWEVCUSTOM ||
682 iwe->cmd == IWEVASSOCREQIE ||
683 iwe->cmd == IWEVASSOCRESPIE ||
684 iwe->cmd == IWEVPMKIDCAND)) {
685 /* WE-19 removed the pointer from struct iw_point */
686 char *dpos = (char *) &iwe_buf.u.data.length;
687 int dlen = dpos - (char *) &iwe_buf;
688 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
689 sizeof(struct iw_event) - dlen);
690 } else {
691 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
692 custom += IW_EV_POINT_OFF;
693 }
694
695 switch (iwe->cmd) {
696 #ifdef WEXT_COMPAT
697 case SIOCGIWAP:
698 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
699 break;
700 wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
701 MACSTR,
702 MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
703 if (is_zero_ether_addr(
704 (const u8 *) iwe->u.ap_addr.sa_data) ||
705 os_memcmp(iwe->u.ap_addr.sa_data,
706 "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
707 0) {
708 os_free(drv->assoc_req_ies);
709 drv->assoc_req_ies = NULL;
710 os_free(drv->assoc_resp_ies);
711 drv->assoc_resp_ies = NULL;
712 wpa_supplicant_event(ctx, EVENT_DISASSOC,
713 NULL);
714
715 } else {
716 wpa_driver_nl80211_event_assoc_ies(drv);
717 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
718 }
719 break;
720 #endif /* WEXT_COMPAT */
721 case IWEVMICHAELMICFAILURE:
722 wpa_driver_nl80211_event_wireless_michaelmicfailure(
723 ctx, custom, iwe->u.data.length);
724 break;
725 #ifdef WEXT_COMPAT
726 case IWEVCUSTOM:
727 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
728 break;
729 if (custom + iwe->u.data.length > end)
730 return;
731 buf = os_malloc(iwe->u.data.length + 1);
732 if (buf == NULL)
733 return;
734 os_memcpy(buf, custom, iwe->u.data.length);
735 buf[iwe->u.data.length] = '\0';
736 wpa_driver_nl80211_event_wireless_custom(ctx, buf);
737 os_free(buf);
738 break;
739 case IWEVASSOCREQIE:
740 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
741 break;
742 wpa_driver_nl80211_event_wireless_assocreqie(
743 drv, custom, iwe->u.data.length);
744 break;
745 case IWEVASSOCRESPIE:
746 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
747 break;
748 wpa_driver_nl80211_event_wireless_assocrespie(
749 drv, custom, iwe->u.data.length);
750 break;
751 case IWEVPMKIDCAND:
752 wpa_driver_nl80211_event_wireless_pmkidcand(
753 drv, custom, iwe->u.data.length);
754 break;
755 #endif /* WEXT_COMPAT */
756 }
757
758 pos += iwe->len;
759 }
760 }
761
762
763 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
764 void *ctx, char *buf, size_t len,
765 int del)
766 {
767 union wpa_event_data event;
768
769 os_memset(&event, 0, sizeof(event));
770 if (len > sizeof(event.interface_status.ifname))
771 len = sizeof(event.interface_status.ifname) - 1;
772 os_memcpy(event.interface_status.ifname, buf, len);
773 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
774 EVENT_INTERFACE_ADDED;
775
776 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
777 del ? "DEL" : "NEW",
778 event.interface_status.ifname,
779 del ? "removed" : "added");
780
781 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
782 if (del)
783 drv->if_removed = 1;
784 else
785 drv->if_removed = 0;
786 }
787
788 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
789 }
790
791
792 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
793 struct nlmsghdr *h)
794 {
795 struct ifinfomsg *ifi;
796 int attrlen, _nlmsg_len, rta_len;
797 struct rtattr *attr;
798
799 ifi = NLMSG_DATA(h);
800
801 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
802
803 attrlen = h->nlmsg_len - _nlmsg_len;
804 if (attrlen < 0)
805 return 0;
806
807 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
808
809 rta_len = RTA_ALIGN(sizeof(struct rtattr));
810 while (RTA_OK(attr, attrlen)) {
811 if (attr->rta_type == IFLA_IFNAME) {
812 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
813 == 0)
814 return 1;
815 else
816 break;
817 }
818 attr = RTA_NEXT(attr, attrlen);
819 }
820
821 return 0;
822 }
823
824
825 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
826 int ifindex, struct nlmsghdr *h)
827 {
828 if (drv->ifindex == ifindex)
829 return 1;
830
831 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
832 drv->ifindex = if_nametoindex(drv->ifname);
833 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
834 "interface");
835 wpa_driver_nl80211_finish_drv_init(drv);
836 return 1;
837 }
838
839 return 0;
840 }
841
842
843 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
844 void *ctx, struct nlmsghdr *h,
845 size_t len)
846 {
847 struct ifinfomsg *ifi;
848 int attrlen, _nlmsg_len, rta_len;
849 struct rtattr * attr;
850
851 if (len < sizeof(*ifi))
852 return;
853
854 ifi = NLMSG_DATA(h);
855
856 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
857 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
858 ifi->ifi_index);
859 return;
860 }
861
862 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
863 "(%s%s%s%s)",
864 drv->operstate, ifi->ifi_flags,
865 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
866 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
867 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
868 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
869 /*
870 * Some drivers send the association event before the operup event--in
871 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
872 * fails. This will hit us when wpa_supplicant does not need to do
873 * IEEE 802.1X authentication
874 */
875 if (drv->operstate == 1 &&
876 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
877 !(ifi->ifi_flags & IFF_RUNNING))
878 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
879
880 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
881
882 attrlen = h->nlmsg_len - _nlmsg_len;
883 if (attrlen < 0)
884 return;
885
886 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
887
888 rta_len = RTA_ALIGN(sizeof(struct rtattr));
889 while (RTA_OK(attr, attrlen)) {
890 if (attr->rta_type == IFLA_WIRELESS) {
891 wpa_driver_nl80211_event_wireless(
892 drv, ctx, ((char *) attr) + rta_len,
893 attr->rta_len - rta_len);
894 } else if (attr->rta_type == IFLA_IFNAME) {
895 wpa_driver_nl80211_event_link(
896 drv, ctx,
897 ((char *) attr) + rta_len,
898 attr->rta_len - rta_len, 0);
899 }
900 attr = RTA_NEXT(attr, attrlen);
901 }
902 }
903
904
905 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
906 void *ctx, struct nlmsghdr *h,
907 size_t len)
908 {
909 struct ifinfomsg *ifi;
910 int attrlen, _nlmsg_len, rta_len;
911 struct rtattr * attr;
912
913 if (len < sizeof(*ifi))
914 return;
915
916 ifi = NLMSG_DATA(h);
917
918 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
919
920 attrlen = h->nlmsg_len - _nlmsg_len;
921 if (attrlen < 0)
922 return;
923
924 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
925
926 rta_len = RTA_ALIGN(sizeof(struct rtattr));
927 while (RTA_OK(attr, attrlen)) {
928 if (attr->rta_type == IFLA_IFNAME) {
929 wpa_driver_nl80211_event_link(
930 drv, ctx,
931 ((char *) attr) + rta_len,
932 attr->rta_len - rta_len, 1);
933 }
934 attr = RTA_NEXT(attr, attrlen);
935 }
936 }
937
938
939 static void wpa_driver_nl80211_event_receive_wext(int sock, void *eloop_ctx,
940 void *sock_ctx)
941 {
942 char buf[8192];
943 int left;
944 struct sockaddr_nl from;
945 socklen_t fromlen;
946 struct nlmsghdr *h;
947 int max_events = 10;
948
949 try_again:
950 fromlen = sizeof(from);
951 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
952 (struct sockaddr *) &from, &fromlen);
953 if (left < 0) {
954 if (errno != EINTR && errno != EAGAIN)
955 perror("recvfrom(netlink)");
956 return;
957 }
958
959 h = (struct nlmsghdr *) buf;
960 while (left >= (int) sizeof(*h)) {
961 int len, plen;
962
963 len = h->nlmsg_len;
964 plen = len - sizeof(*h);
965 if (len > left || plen < 0) {
966 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
967 "len=%d left=%d plen=%d",
968 len, left, plen);
969 break;
970 }
971
972 switch (h->nlmsg_type) {
973 case RTM_NEWLINK:
974 wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
975 h, plen);
976 break;
977 case RTM_DELLINK:
978 wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
979 h, plen);
980 break;
981 }
982
983 len = NLMSG_ALIGN(len);
984 left -= len;
985 h = (struct nlmsghdr *) ((char *) h + len);
986 }
987
988 if (left > 0) {
989 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
990 "message", left);
991 }
992
993 if (--max_events > 0) {
994 /*
995 * Try to receive all events in one eloop call in order to
996 * limit race condition on cases where AssocInfo event, Assoc
997 * event, and EAPOL frames are received more or less at the
998 * same time. We want to process the event messages first
999 * before starting EAPOL processing.
1000 */
1001 goto try_again;
1002 }
1003 }
1004
1005
1006 static int no_seq_check(struct nl_msg *msg, void *arg)
1007 {
1008 return NL_OK;
1009 }
1010
1011
1012 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
1013 const u8 *frame, size_t len)
1014 {
1015 const struct ieee80211_mgmt *mgmt;
1016 union wpa_event_data event;
1017
1018 mgmt = (const struct ieee80211_mgmt *) frame;
1019 if (len < 24 + sizeof(mgmt->u.auth)) {
1020 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
1021 "frame");
1022 return;
1023 }
1024
1025 os_memset(&event, 0, sizeof(event));
1026 os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
1027 event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
1028 event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
1029 if (len > 24 + sizeof(mgmt->u.auth)) {
1030 event.auth.ies = mgmt->u.auth.variable;
1031 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
1032 }
1033
1034 wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
1035 }
1036
1037
1038 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
1039 const u8 *frame, size_t len)
1040 {
1041 const struct ieee80211_mgmt *mgmt;
1042 union wpa_event_data event;
1043 u16 status;
1044
1045 mgmt = (const struct ieee80211_mgmt *) frame;
1046 if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
1047 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
1048 "frame");
1049 return;
1050 }
1051
1052 status = le_to_host16(mgmt->u.assoc_resp.status_code);
1053 if (status != WLAN_STATUS_SUCCESS) {
1054 wpa_printf(MSG_DEBUG, "nl80211: Association failed: status "
1055 "code %d", status);
1056 /* TODO: notify SME so that things like SA Query and comeback
1057 * time can be implemented */
1058 return;
1059 }
1060
1061 drv->associated = 1;
1062 os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
1063
1064 os_memset(&event, 0, sizeof(event));
1065 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
1066 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
1067 event.assoc_info.resp_ies_len =
1068 len - 24 - sizeof(mgmt->u.assoc_req);
1069 }
1070
1071 wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
1072 }
1073
1074
1075 static void mlme_event(struct wpa_driver_nl80211_data *drv,
1076 enum nl80211_commands cmd, struct nlattr *frame)
1077 {
1078 if (frame == NULL) {
1079 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
1080 "data", cmd);
1081 return;
1082 }
1083
1084 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
1085 wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
1086 nla_data(frame), nla_len(frame));
1087
1088 switch (cmd) {
1089 case NL80211_CMD_AUTHENTICATE:
1090 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
1091 break;
1092 case NL80211_CMD_ASSOCIATE:
1093 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
1094 break;
1095 case NL80211_CMD_DEAUTHENTICATE:
1096 drv->associated = 0;
1097 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
1098 break;
1099 case NL80211_CMD_DISASSOCIATE:
1100 drv->associated = 0;
1101 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
1102 break;
1103 default:
1104 break;
1105 }
1106 }
1107
1108
1109 static int process_event(struct nl_msg *msg, void *arg)
1110 {
1111 struct wpa_driver_nl80211_data *drv = arg;
1112 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1113 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1114
1115 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1116 genlmsg_attrlen(gnlh, 0), NULL);
1117
1118 if (tb[NL80211_ATTR_IFINDEX]) {
1119 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1120 if (ifindex != drv->ifindex) {
1121 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
1122 " for foreign interface (ifindex %d)",
1123 gnlh->cmd, ifindex);
1124 return NL_SKIP;
1125 }
1126 }
1127
1128 switch (gnlh->cmd) {
1129 case NL80211_CMD_NEW_SCAN_RESULTS:
1130 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
1131 drv->scan_complete_events = 1;
1132 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1133 drv->ctx);
1134 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
1135 break;
1136 case NL80211_CMD_SCAN_ABORTED:
1137 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
1138 /*
1139 * Need to indicate that scan results are available in order
1140 * not to make wpa_supplicant stop its scanning.
1141 */
1142 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1143 drv->ctx);
1144 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
1145 break;
1146 case NL80211_CMD_AUTHENTICATE:
1147 case NL80211_CMD_ASSOCIATE:
1148 case NL80211_CMD_DEAUTHENTICATE:
1149 case NL80211_CMD_DISASSOCIATE:
1150 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
1151 break;
1152 default:
1153 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
1154 "(cmd=%d)", gnlh->cmd);
1155 break;
1156 }
1157
1158 return NL_SKIP;
1159 }
1160
1161
1162 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
1163 void *sock_ctx)
1164 {
1165 struct nl_cb *cb;
1166 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1167
1168 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
1169
1170 cb = nl_cb_clone(drv->nl_cb);
1171 if (!cb)
1172 return;
1173 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
1174 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
1175 nl_recvmsgs(drv->nl_handle, cb);
1176 nl_cb_put(cb);
1177 }
1178
1179
1180 static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv,
1181 const char *ifname, int *flags)
1182 {
1183 struct ifreq ifr;
1184
1185 os_memset(&ifr, 0, sizeof(ifr));
1186 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
1187 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
1188 perror("ioctl[SIOCGIFFLAGS]");
1189 return -1;
1190 }
1191 *flags = ifr.ifr_flags & 0xffff;
1192 return 0;
1193 }
1194
1195
1196 /**
1197 * wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS)
1198 * @drv: driver_nl80211 private data
1199 * @flags: Pointer to returned flags value
1200 * Returns: 0 on success, -1 on failure
1201 */
1202 static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv,
1203 int *flags)
1204 {
1205 return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags);
1206 }
1207
1208
1209 static int wpa_driver_nl80211_set_ifflags_ifname(
1210 struct wpa_driver_nl80211_data *drv,
1211 const char *ifname, int flags)
1212 {
1213 struct ifreq ifr;
1214
1215 os_memset(&ifr, 0, sizeof(ifr));
1216 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
1217 ifr.ifr_flags = flags & 0xffff;
1218 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
1219 perror("SIOCSIFFLAGS");
1220 return -1;
1221 }
1222 return 0;
1223 }
1224
1225
1226 /**
1227 * wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS)
1228 * @drv: driver_nl80211 private data
1229 * @flags: New value for flags
1230 * Returns: 0 on success, -1 on failure
1231 */
1232 static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv,
1233 int flags)
1234 {
1235 return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags);
1236 }
1237
1238
1239 /**
1240 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1241 * @priv: driver_nl80211 private data
1242 * @alpha2_arg: country to which to switch to
1243 * Returns: 0 on success, -1 on failure
1244 *
1245 * This asks nl80211 to set the regulatory domain for given
1246 * country ISO / IEC alpha2.
1247 */
1248 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1249 {
1250 struct wpa_driver_nl80211_data *drv = priv;
1251 char alpha2[3];
1252 struct nl_msg *msg;
1253
1254 msg = nlmsg_alloc();
1255 if (!msg)
1256 goto nla_put_failure;
1257
1258 alpha2[0] = alpha2_arg[0];
1259 alpha2[1] = alpha2_arg[1];
1260 alpha2[2] = '\0';
1261
1262 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1263 0, NL80211_CMD_REQ_SET_REG, 0);
1264
1265 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1266 if (send_and_recv_msgs(drv, msg, NULL, NULL))
1267 return -EINVAL;
1268 return 0;
1269 nla_put_failure:
1270 return -EINVAL;
1271 }
1272
1273
1274 struct wiphy_info_data {
1275 int max_scan_ssids;
1276 };
1277
1278
1279 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1280 {
1281 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1282 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1283 struct wiphy_info_data *info = arg;
1284
1285 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1286 genlmsg_attrlen(gnlh, 0), NULL);
1287
1288 if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1289 info->max_scan_ssids =
1290 nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1291
1292 return NL_SKIP;
1293 }
1294
1295
1296 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1297 struct wiphy_info_data *info)
1298 {
1299 struct nl_msg *msg;
1300
1301 os_memset(info, 0, sizeof(*info));
1302 msg = nlmsg_alloc();
1303 if (!msg)
1304 return -1;
1305
1306 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1307 0, NL80211_CMD_GET_WIPHY, 0);
1308
1309 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1310
1311 if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1312 return 0;
1313 msg = NULL;
1314 nla_put_failure:
1315 nlmsg_free(msg);
1316 return -1;
1317 }
1318
1319
1320 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1321 {
1322 struct wiphy_info_data info;
1323 if (wpa_driver_nl80211_get_info(drv, &info))
1324 return;
1325 drv->has_capability = 1;
1326 drv->capa.max_scan_ssids = info.max_scan_ssids;
1327 }
1328
1329
1330 /**
1331 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1332 * @ctx: context to be used when calling wpa_supplicant functions,
1333 * e.g., wpa_supplicant_event()
1334 * @ifname: interface name, e.g., wlan0
1335 * Returns: Pointer to private data, %NULL on failure
1336 */
1337 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1338 {
1339 int s, ret;
1340 struct sockaddr_nl local;
1341 struct wpa_driver_nl80211_data *drv;
1342
1343 drv = os_zalloc(sizeof(*drv));
1344 if (drv == NULL)
1345 return NULL;
1346 drv->ctx = ctx;
1347 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1348
1349 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1350 if (drv->nl_cb == NULL) {
1351 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1352 "callbacks");
1353 goto err1;
1354 }
1355
1356 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1357 if (drv->nl_handle == NULL) {
1358 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1359 "callbacks");
1360 goto err2;
1361 }
1362
1363 if (genl_connect(drv->nl_handle)) {
1364 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1365 "netlink");
1366 goto err3;
1367 }
1368
1369 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1370 if (drv->nl_cache == NULL) {
1371 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1372 "netlink cache");
1373 goto err3;
1374 }
1375
1376 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1377 if (drv->nl80211 == NULL) {
1378 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1379 "found");
1380 goto err4;
1381 }
1382
1383 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1384 if (ret >= 0)
1385 ret = nl_socket_add_membership(drv->nl_handle, ret);
1386 if (ret < 0) {
1387 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1388 "membership for scan events: %d (%s)",
1389 ret, strerror(-ret));
1390 goto err4;
1391 }
1392
1393 ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1394 if (ret >= 0)
1395 ret = nl_socket_add_membership(drv->nl_handle, ret);
1396 #ifdef WEXT_COMPAT
1397 if (ret < 0) {
1398 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
1399 "membership for mlme events: %d (%s)",
1400 ret, strerror(-ret));
1401 /* Use WEXT for association request */
1402 } else
1403 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1404 #else /* WEXT_COMPAT */
1405 if (ret < 0) {
1406 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1407 "membership for mlme events: %d (%s)",
1408 ret, strerror(-ret));
1409 goto err4;
1410 }
1411 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1412 #endif /* WEXT_COMPAT */
1413
1414 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1415 wpa_driver_nl80211_event_receive, drv, ctx);
1416
1417 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1418 if (drv->ioctl_sock < 0) {
1419 perror("socket(PF_INET,SOCK_DGRAM)");
1420 goto err5;
1421 }
1422
1423 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1424 if (s < 0) {
1425 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1426 goto err6;
1427 }
1428
1429 os_memset(&local, 0, sizeof(local));
1430 local.nl_family = AF_NETLINK;
1431 local.nl_groups = RTMGRP_LINK;
1432 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1433 perror("bind(netlink)");
1434 close(s);
1435 goto err6;
1436 }
1437
1438 eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_wext, drv,
1439 ctx);
1440 drv->wext_event_sock = s;
1441
1442 if (wpa_driver_nl80211_finish_drv_init(drv))
1443 goto err7;
1444
1445 return drv;
1446
1447 err7:
1448 eloop_unregister_read_sock(drv->wext_event_sock);
1449 close(drv->wext_event_sock);
1450 err6:
1451 close(drv->ioctl_sock);
1452 err5:
1453 genl_family_put(drv->nl80211);
1454 err4:
1455 nl_cache_free(drv->nl_cache);
1456 err3:
1457 nl_handle_destroy(drv->nl_handle);
1458 err2:
1459 nl_cb_put(drv->nl_cb);
1460 err1:
1461 os_free(drv);
1462 return NULL;
1463 }
1464
1465
1466 static int
1467 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1468 {
1469 int flags;
1470
1471 if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0) {
1472 wpa_printf(MSG_ERROR, "Could not get interface '%s' flags",
1473 drv->ifname);
1474 return -1;
1475 }
1476 if (!(flags & IFF_UP)) {
1477 if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
1478 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1479 "UP", drv->ifname);
1480 return -1;
1481 }
1482 }
1483
1484 #ifdef WEXT_COMPAT
1485 /*
1486 * Make sure that the driver does not have any obsolete PMKID entries.
1487 */
1488 wpa_driver_nl80211_flush_pmkid(drv);
1489 #endif /* WEXT_COMPAT */
1490
1491 if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1492 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1493 "use managed mode");
1494 }
1495
1496 wpa_driver_nl80211_get_range(drv);
1497
1498 drv->ifindex = if_nametoindex(drv->ifname);
1499
1500 wpa_driver_nl80211_capa(drv);
1501
1502 wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1503
1504 return 0;
1505 }
1506
1507
1508 /**
1509 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1510 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1511 *
1512 * Shut down driver interface and processing of driver events. Free
1513 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1514 */
1515 static void wpa_driver_nl80211_deinit(void *priv)
1516 {
1517 struct wpa_driver_nl80211_data *drv = priv;
1518 int flags;
1519
1520 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1521
1522 #ifdef WEXT_COMPAT
1523 /*
1524 * Clear possibly configured driver parameters in order to make it
1525 * easier to use the driver after wpa_supplicant has been terminated.
1526 */
1527 (void) wpa_driver_nl80211_set_bssid(drv,
1528 (u8 *) "\x00\x00\x00\x00\x00\x00");
1529 #endif /* WEXT_COMPAT */
1530
1531 wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1532
1533 eloop_unregister_read_sock(drv->wext_event_sock);
1534
1535 if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0)
1536 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
1537
1538 close(drv->wext_event_sock);
1539 close(drv->ioctl_sock);
1540 #ifdef WEXT_COMPAT
1541 os_free(drv->assoc_req_ies);
1542 os_free(drv->assoc_resp_ies);
1543 #endif /* WEXT_COMPAT */
1544
1545 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1546 genl_family_put(drv->nl80211);
1547 nl_cache_free(drv->nl_cache);
1548 nl_handle_destroy(drv->nl_handle);
1549 nl_cb_put(drv->nl_cb);
1550
1551 os_free(drv);
1552 }
1553
1554
1555 /**
1556 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1557 * @eloop_ctx: Unused
1558 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1559 *
1560 * This function can be used as registered timeout when starting a scan to
1561 * generate a scan completed event if the driver does not report this.
1562 */
1563 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1564 {
1565 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1566 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1567 }
1568
1569
1570 /**
1571 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1572 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1573 * @params: Scan parameters
1574 * Returns: 0 on success, -1 on failure
1575 */
1576 static int wpa_driver_nl80211_scan(void *priv,
1577 struct wpa_driver_scan_params *params)
1578 {
1579 struct wpa_driver_nl80211_data *drv = priv;
1580 int ret = 0, timeout;
1581 struct nl_msg *msg, *ssids;
1582 size_t i;
1583
1584 msg = nlmsg_alloc();
1585 ssids = nlmsg_alloc();
1586 if (!msg || !ssids) {
1587 nlmsg_free(msg);
1588 nlmsg_free(ssids);
1589 return -1;
1590 }
1591
1592 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1593 NL80211_CMD_TRIGGER_SCAN, 0);
1594
1595 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1596
1597 for (i = 0; i < params->num_ssids; i++) {
1598 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1599 params->ssids[i].ssid);
1600 }
1601 if (params->num_ssids)
1602 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1603
1604 if (params->extra_ies) {
1605 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1606 params->extra_ies);
1607 }
1608
1609 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1610 msg = NULL;
1611 if (ret) {
1612 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1613 "(%s)", ret, strerror(-ret));
1614 goto nla_put_failure;
1615 }
1616
1617 /* Not all drivers generate "scan completed" wireless event, so try to
1618 * read results after a timeout. */
1619 timeout = 10;
1620 if (drv->scan_complete_events) {
1621 /*
1622 * The driver seems to deliver events to notify when scan is
1623 * complete, so use longer timeout to avoid race conditions
1624 * with scanning and following association request.
1625 */
1626 timeout = 30;
1627 }
1628 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1629 "seconds", ret, timeout);
1630 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1631 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1632 drv, drv->ctx);
1633
1634 nla_put_failure:
1635 nlmsg_free(ssids);
1636 nlmsg_free(msg);
1637 return ret;
1638 }
1639
1640
1641 static int bss_info_handler(struct nl_msg *msg, void *arg)
1642 {
1643 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1644 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1645 struct nlattr *bss[NL80211_BSS_MAX + 1];
1646 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1647 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1648 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1649 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1650 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1651 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1652 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1653 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1654 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1655 };
1656 struct wpa_scan_results *res = arg;
1657 struct wpa_scan_res **tmp;
1658 struct wpa_scan_res *r;
1659 const u8 *ie;
1660 size_t ie_len;
1661
1662 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1663 genlmsg_attrlen(gnlh, 0), NULL);
1664 if (!tb[NL80211_ATTR_BSS])
1665 return NL_SKIP;
1666 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1667 bss_policy))
1668 return NL_SKIP;
1669 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1670 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1671 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1672 } else {
1673 ie = NULL;
1674 ie_len = 0;
1675 }
1676
1677 r = os_zalloc(sizeof(*r) + ie_len);
1678 if (r == NULL)
1679 return NL_SKIP;
1680 if (bss[NL80211_BSS_BSSID])
1681 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1682 ETH_ALEN);
1683 if (bss[NL80211_BSS_FREQUENCY])
1684 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1685 if (bss[NL80211_BSS_BEACON_INTERVAL])
1686 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1687 if (bss[NL80211_BSS_CAPABILITY])
1688 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1689 r->flags |= WPA_SCAN_NOISE_INVALID;
1690 if (bss[NL80211_BSS_SIGNAL_MBM]) {
1691 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1692 r->level /= 100; /* mBm to dBm */
1693 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1694 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1695 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1696 r->flags |= WPA_SCAN_LEVEL_INVALID;
1697 } else
1698 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1699 if (bss[NL80211_BSS_TSF])
1700 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1701 r->ie_len = ie_len;
1702 if (ie)
1703 os_memcpy(r + 1, ie, ie_len);
1704
1705 tmp = os_realloc(res->res,
1706 (res->num + 1) * sizeof(struct wpa_scan_res *));
1707 if (tmp == NULL) {
1708 os_free(r);
1709 return NL_SKIP;
1710 }
1711 tmp[res->num++] = r;
1712 res->res = tmp;
1713
1714 return NL_SKIP;
1715 }
1716
1717
1718 /**
1719 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1720 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1721 * Returns: Scan results on success, -1 on failure
1722 */
1723 static struct wpa_scan_results *
1724 wpa_driver_nl80211_get_scan_results(void *priv)
1725 {
1726 struct wpa_driver_nl80211_data *drv = priv;
1727 struct nl_msg *msg;
1728 struct wpa_scan_results *res;
1729 int ret;
1730
1731 res = os_zalloc(sizeof(*res));
1732 if (res == NULL)
1733 return 0;
1734 msg = nlmsg_alloc();
1735 if (!msg)
1736 goto nla_put_failure;
1737
1738 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1739 NL80211_CMD_GET_SCAN, 0);
1740 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1741
1742 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1743 msg = NULL;
1744 if (ret == 0) {
1745 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1746 (unsigned long) res->num);
1747 return res;
1748 }
1749 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1750 "(%s)", ret, strerror(-ret));
1751 nla_put_failure:
1752 nlmsg_free(msg);
1753 wpa_scan_results_free(res);
1754 return NULL;
1755 }
1756
1757
1758 static int wpa_driver_nl80211_get_range(void *priv)
1759 {
1760 struct wpa_driver_nl80211_data *drv = priv;
1761 struct iw_range *range;
1762 struct iwreq iwr;
1763 int minlen;
1764 size_t buflen;
1765
1766 /*
1767 * Use larger buffer than struct iw_range in order to allow the
1768 * structure to grow in the future.
1769 */
1770 buflen = sizeof(struct iw_range) + 500;
1771 range = os_zalloc(buflen);
1772 if (range == NULL)
1773 return -1;
1774
1775 os_memset(&iwr, 0, sizeof(iwr));
1776 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1777 iwr.u.data.pointer = (caddr_t) range;
1778 iwr.u.data.length = buflen;
1779
1780 minlen = ((char *) &range->enc_capa) - (char *) range +
1781 sizeof(range->enc_capa);
1782
1783 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1784 perror("ioctl[SIOCGIWRANGE]");
1785 os_free(range);
1786 return -1;
1787 } else if (iwr.u.data.length >= minlen &&
1788 range->we_version_compiled >= 18) {
1789 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1790 "WE(source)=%d enc_capa=0x%x",
1791 range->we_version_compiled,
1792 range->we_version_source,
1793 range->enc_capa);
1794 drv->has_capability = 1;
1795 drv->we_version_compiled = range->we_version_compiled;
1796 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1797 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1798 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1799 }
1800 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1801 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1802 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1803 }
1804 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1805 WPA_DRIVER_CAPA_ENC_WEP104;
1806 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1807 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1808 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1809 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1810 wpa_printf(MSG_DEBUG, " capabilities: key_mgmt 0x%x enc 0x%x",
1811 drv->capa.key_mgmt, drv->capa.enc);
1812 } else {
1813 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1814 "assuming WPA is not supported");
1815 }
1816
1817 os_free(range);
1818 return 0;
1819 }
1820
1821
1822 #ifdef WEXT_COMPAT
1823 static int wpa_driver_nl80211_set_wpa(void *priv, int enabled)
1824 {
1825 struct wpa_driver_nl80211_data *drv = priv;
1826 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
1827 return 0;
1828 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1829
1830 return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1831 enabled);
1832 }
1833 #endif /* WEXT_COMPAT */
1834
1835
1836 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1837 const u8 *addr, int key_idx,
1838 int set_tx, const u8 *seq,
1839 size_t seq_len,
1840 const u8 *key, size_t key_len)
1841 {
1842 struct wpa_driver_nl80211_data *drv = priv;
1843 int err;
1844 struct nl_msg *msg;
1845
1846 wpa_printf(MSG_DEBUG, "%s: alg=%d addr=%p key_idx=%d set_tx=%d "
1847 "seq_len=%lu key_len=%lu",
1848 __func__, alg, addr, key_idx, set_tx,
1849 (unsigned long) seq_len, (unsigned long) key_len);
1850
1851 msg = nlmsg_alloc();
1852 if (msg == NULL)
1853 return -1;
1854
1855 if (alg == WPA_ALG_NONE) {
1856 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1857 NL80211_CMD_DEL_KEY, 0);
1858 } else {
1859 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1860 NL80211_CMD_NEW_KEY, 0);
1861 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1862 switch (alg) {
1863 case WPA_ALG_WEP:
1864 if (key_len == 5)
1865 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1866 0x000FAC01);
1867 else
1868 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1869 0x000FAC05);
1870 break;
1871 case WPA_ALG_TKIP:
1872 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1873 break;
1874 case WPA_ALG_CCMP:
1875 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1876 break;
1877 default:
1878 nlmsg_free(msg);
1879 return -1;
1880 }
1881 }
1882
1883 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1884 {
1885 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1886 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1887 }
1888 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1889 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1890
1891 err = send_and_recv_msgs(drv, msg, NULL, NULL);
1892 if (err) {
1893 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d", err);
1894 return -1;
1895 }
1896
1897 if (set_tx && alg != WPA_ALG_NONE) {
1898 msg = nlmsg_alloc();
1899 if (msg == NULL)
1900 return -1;
1901
1902 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1903 0, NL80211_CMD_SET_KEY, 0);
1904 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1905 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1906 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1907
1908 err = send_and_recv_msgs(drv, msg, NULL, NULL);
1909 if (err) {
1910 wpa_printf(MSG_DEBUG, "nl80211: set default key "
1911 "failed; err=%d", err);
1912 return -1;
1913 }
1914 }
1915
1916 return 0;
1917
1918 nla_put_failure:
1919 return -ENOBUFS;
1920 }
1921
1922
1923 #ifdef WEXT_COMPAT
1924 static int wpa_driver_nl80211_set_countermeasures(void *priv,
1925 int enabled)
1926 {
1927 struct wpa_driver_nl80211_data *drv = priv;
1928 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
1929 return 0;
1930 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1931 return wpa_driver_nl80211_set_auth_param(drv,
1932 IW_AUTH_TKIP_COUNTERMEASURES,
1933 enabled);
1934 }
1935 #endif /* WEXT_COMPAT */
1936
1937
1938 static int wpa_driver_nl80211_set_drop_unencrypted(void *priv,
1939 int enabled)
1940 {
1941 struct wpa_driver_nl80211_data *drv = priv;
1942 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1943 #ifdef WEXT_COMPAT
1944 drv->use_crypt = enabled;
1945 #endif /* WEXT_COMPAT */
1946 return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1947 enabled);
1948 }
1949
1950
1951 #ifdef WEXT_COMPAT
1952 static int wpa_driver_nl80211_mlme_wext(struct wpa_driver_nl80211_data *drv,
1953 const u8 *addr, int cmd,
1954 int reason_code)
1955 {
1956 struct iwreq iwr;
1957 struct iw_mlme mlme;
1958 int ret = 0;
1959
1960 os_memset(&iwr, 0, sizeof(iwr));
1961 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1962 os_memset(&mlme, 0, sizeof(mlme));
1963 mlme.cmd = cmd;
1964 mlme.reason_code = reason_code;
1965 mlme.addr.sa_family = ARPHRD_ETHER;
1966 os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1967 iwr.u.data.pointer = (caddr_t) &mlme;
1968 iwr.u.data.length = sizeof(mlme);
1969
1970 if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1971 perror("ioctl[SIOCSIWMLME]");
1972 ret = -1;
1973 }
1974
1975 return ret;
1976 }
1977 #endif /* WEXT_COMPAT */
1978
1979
1980 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1981 const u8 *addr, int cmd, u16 reason_code)
1982 {
1983 int ret = -1;
1984 struct nl_msg *msg;
1985
1986 msg = nlmsg_alloc();
1987 if (!msg)
1988 return -1;
1989
1990 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1991
1992 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1993 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1994 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1995
1996 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1997 msg = NULL;
1998 if (ret) {
1999 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2000 "(%s)", ret, strerror(-ret));
2001 goto nla_put_failure;
2002 }
2003 ret = 0;
2004
2005 nla_put_failure:
2006 nlmsg_free(msg);
2007 return ret;
2008 }
2009
2010
2011 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2012 int reason_code)
2013 {
2014 struct wpa_driver_nl80211_data *drv = priv;
2015 wpa_printf(MSG_DEBUG, "%s", __func__);
2016 #ifdef WEXT_COMPAT
2017 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2018 return wpa_driver_nl80211_mlme_wext(drv, addr, IW_MLME_DEAUTH,
2019 reason_code);
2020 #endif /* WEXT_COMPAT */
2021
2022 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2023 reason_code);
2024 }
2025
2026
2027 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2028 int reason_code)
2029 {
2030 struct wpa_driver_nl80211_data *drv = priv;
2031 wpa_printf(MSG_DEBUG, "%s", __func__);
2032 #ifdef WEXT_COMPAT
2033 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2034 return wpa_driver_nl80211_mlme_wext(drv, addr,
2035 IW_MLME_DISASSOC,
2036 reason_code);
2037 #endif /* WEXT_COMPAT */
2038 return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2039 reason_code);
2040 }
2041
2042
2043 #ifdef WEXT_COMPAT
2044 static int wpa_driver_nl80211_set_gen_ie(void *priv, const u8 *ie,
2045 size_t ie_len)
2046 {
2047 struct wpa_driver_nl80211_data *drv = priv;
2048 struct iwreq iwr;
2049 int ret = 0;
2050
2051 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
2052 return 0;
2053 os_memset(&iwr, 0, sizeof(iwr));
2054 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2055 iwr.u.data.pointer = (caddr_t) ie;
2056 iwr.u.data.length = ie_len;
2057
2058 if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2059 perror("ioctl[SIOCSIWGENIE]");
2060 ret = -1;
2061 }
2062
2063 return ret;
2064 }
2065
2066
2067 static int wpa_driver_nl80211_cipher2wext(int cipher)
2068 {
2069 switch (cipher) {
2070 case CIPHER_NONE:
2071 return IW_AUTH_CIPHER_NONE;
2072 case CIPHER_WEP40:
2073 return IW_AUTH_CIPHER_WEP40;
2074 case CIPHER_TKIP:
2075 return IW_AUTH_CIPHER_TKIP;
2076 case CIPHER_CCMP:
2077 return IW_AUTH_CIPHER_CCMP;
2078 case CIPHER_WEP104:
2079 return IW_AUTH_CIPHER_WEP104;
2080 default:
2081 return 0;
2082 }
2083 }
2084
2085
2086 static int wpa_driver_nl80211_keymgmt2wext(int keymgmt)
2087 {
2088 switch (keymgmt) {
2089 case KEY_MGMT_802_1X:
2090 case KEY_MGMT_802_1X_NO_WPA:
2091 return IW_AUTH_KEY_MGMT_802_1X;
2092 case KEY_MGMT_PSK:
2093 return IW_AUTH_KEY_MGMT_PSK;
2094 default:
2095 return 0;
2096 }
2097 }
2098
2099
2100 static int
2101 wpa_driver_nl80211_auth_alg_fallback(struct wpa_driver_nl80211_data *drv,
2102 struct wpa_driver_associate_params *params)
2103 {
2104 struct iwreq iwr;
2105 int ret = 0;
2106
2107 wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2108 "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2109
2110 os_memset(&iwr, 0, sizeof(iwr));
2111 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2112 /* Just changing mode, not actual keys */
2113 iwr.u.encoding.flags = 0;
2114 iwr.u.encoding.pointer = (caddr_t) NULL;
2115 iwr.u.encoding.length = 0;
2116
2117 /*
2118 * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2119 * different things. Here they are used to indicate Open System vs.
2120 * Shared Key authentication algorithm. However, some drivers may use
2121 * them to select between open/restricted WEP encrypted (open = allow
2122 * both unencrypted and encrypted frames; restricted = only allow
2123 * encrypted frames).
2124 */
2125
2126 if (!drv->use_crypt) {
2127 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2128 } else {
2129 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2130 iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2131 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2132 iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2133 }
2134
2135 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2136 perror("ioctl[SIOCSIWENCODE]");
2137 ret = -1;
2138 }
2139
2140 return ret;
2141 }
2142
2143
2144 static int wpa_driver_nl80211_associate_wext(
2145 void *priv, struct wpa_driver_associate_params *params)
2146 {
2147 struct wpa_driver_nl80211_data *drv = priv;
2148 int ret = 0;
2149 int allow_unencrypted_eapol;
2150 int value;
2151
2152 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2153
2154 /*
2155 * If the driver did not support SIOCSIWAUTH, fallback to
2156 * SIOCSIWENCODE here.
2157 */
2158 if (drv->auth_alg_fallback &&
2159 wpa_driver_nl80211_auth_alg_fallback(drv, params) < 0)
2160 ret = -1;
2161
2162 if (!params->bssid &&
2163 wpa_driver_nl80211_set_bssid(drv, NULL) < 0)
2164 ret = -1;
2165
2166 /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2167 * from configuration, not from here, where only the selected suite is
2168 * available */
2169 if (wpa_driver_nl80211_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2170 < 0)
2171 ret = -1;
2172 if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2173 value = IW_AUTH_WPA_VERSION_DISABLED;
2174 else if (params->wpa_ie[0] == WLAN_EID_RSN)
2175 value = IW_AUTH_WPA_VERSION_WPA2;
2176 else
2177 value = IW_AUTH_WPA_VERSION_WPA;
2178 if (wpa_driver_nl80211_set_auth_param(drv,
2179 IW_AUTH_WPA_VERSION, value) < 0)
2180 ret = -1;
2181 value = wpa_driver_nl80211_cipher2wext(params->pairwise_suite);
2182 if (wpa_driver_nl80211_set_auth_param(drv,
2183 IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2184 ret = -1;
2185 value = wpa_driver_nl80211_cipher2wext(params->group_suite);
2186 if (wpa_driver_nl80211_set_auth_param(drv,
2187 IW_AUTH_CIPHER_GROUP, value) < 0)
2188 ret = -1;
2189 value = wpa_driver_nl80211_keymgmt2wext(params->key_mgmt_suite);
2190 if (wpa_driver_nl80211_set_auth_param(drv,
2191 IW_AUTH_KEY_MGMT, value) < 0)
2192 ret = -1;
2193 value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2194 params->pairwise_suite != CIPHER_NONE ||
2195 params->group_suite != CIPHER_NONE ||
2196 params->wpa_ie_len;
2197 if (wpa_driver_nl80211_set_auth_param(drv,
2198 IW_AUTH_PRIVACY_INVOKED, value) < 0)
2199 ret = -1;
2200
2201 /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2202 * not using WPA. IEEE 802.1X specifies that these frames are not
2203 * encrypted, but WPA encrypts them when pairwise keys are in use. */
2204 if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2205 params->key_mgmt_suite == KEY_MGMT_PSK)
2206 allow_unencrypted_eapol = 0;
2207 else
2208 allow_unencrypted_eapol = 1;
2209
2210 if (wpa_driver_nl80211_set_auth_param(drv,
2211 IW_AUTH_RX_UNENCRYPTED_EAPOL,
2212 allow_unencrypted_eapol) < 0)
2213 ret = -1;
2214 if (params->freq && wpa_driver_nl80211_set_freq(drv, params->freq) < 0)
2215 ret = -1;
2216 if (wpa_driver_nl80211_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2217 ret = -1;
2218 if (params->bssid &&
2219 wpa_driver_nl80211_set_bssid(drv, params->bssid) < 0)
2220 ret = -1;
2221
2222 return ret;
2223 }
2224
2225
2226 static int wpa_driver_nl80211_set_auth_alg(void *priv, int auth_alg)
2227 {
2228 struct wpa_driver_nl80211_data *drv = priv;
2229 int algs = 0, res;
2230
2231 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME)
2232 return 0;
2233
2234 if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2235 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2236 if (auth_alg & AUTH_ALG_SHARED_KEY)
2237 algs |= IW_AUTH_ALG_SHARED_KEY;
2238 if (auth_alg & AUTH_ALG_LEAP)
2239 algs |= IW_AUTH_ALG_LEAP;
2240 if (algs == 0) {
2241 /* at least one algorithm should be set */
2242 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2243 }
2244
2245 res = wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2246 algs);
2247 drv->auth_alg_fallback = res == -2;
2248 return res;
2249 }
2250 #endif /* WEXT_COMPAT */
2251
2252
2253 static int wpa_driver_nl80211_authenticate(
2254 void *priv, struct wpa_driver_auth_params *params)
2255 {
2256 struct wpa_driver_nl80211_data *drv = priv;
2257 int ret = -1;
2258 struct nl_msg *msg;
2259 enum nl80211_auth_type type;
2260
2261 drv->associated = 0;
2262
2263 msg = nlmsg_alloc();
2264 if (!msg)
2265 return -1;
2266
2267 wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2268 drv->ifindex);
2269 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2270 NL80211_CMD_AUTHENTICATE, 0);
2271
2272 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2273 if (params->bssid) {
2274 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
2275 MAC2STR(params->bssid));
2276 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2277 }
2278 if (params->freq) {
2279 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
2280 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2281 }
2282 if (params->ssid) {
2283 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
2284 params->ssid, params->ssid_len);
2285 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2286 params->ssid);
2287 }
2288 wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
2289 if (params->ie)
2290 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2291 /*
2292 * TODO: if multiple auth_alg options enabled, try them one by one if
2293 * the AP rejects authentication due to unknown auth alg
2294 */
2295 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2296 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2297 else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2298 type = NL80211_AUTHTYPE_SHARED_KEY;
2299 else if (params->auth_alg & AUTH_ALG_LEAP)
2300 type = NL80211_AUTHTYPE_NETWORK_EAP;
2301 else if (params->auth_alg & AUTH_ALG_FT)
2302 type = NL80211_AUTHTYPE_FT;
2303 else
2304 goto nla_put_failure;
2305 wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
2306 NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2307
2308 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2309 msg = NULL;
2310 if (ret) {
2311 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2312 "(%s)", ret, strerror(-ret));
2313 goto nla_put_failure;
2314 }
2315 ret = 0;
2316 wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2317 "successfully");
2318
2319 nla_put_failure:
2320 nlmsg_free(msg);
2321 return ret;
2322 }
2323
2324
2325 static int wpa_driver_nl80211_associate(
2326 void *priv, struct wpa_driver_associate_params *params)
2327 {
2328 struct wpa_driver_nl80211_data *drv = priv;
2329 int ret = -1;
2330 struct nl_msg *msg;
2331
2332 #ifdef WEXT_COMPAT
2333 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2334 return wpa_driver_nl80211_associate_wext(drv, params);
2335 #endif /* WEXT_COMPAT */
2336
2337 drv->associated = 0;
2338
2339 msg = nlmsg_alloc();
2340 if (!msg)
2341 return -1;
2342
2343 wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2344 drv->ifindex);
2345 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2346 NL80211_CMD_ASSOCIATE, 0);
2347
2348 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2349 if (params->bssid) {
2350 wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
2351 MAC2STR(params->bssid));
2352 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2353 }
2354 if (params->freq) {
2355 wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
2356 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2357 }
2358 if (params->ssid) {
2359 wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
2360 params->ssid, params->ssid_len);
2361 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2362 params->ssid);
2363 if (params->ssid_len > sizeof(drv->ssid))
2364 goto nla_put_failure;
2365 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2366 drv->ssid_len = params->ssid_len;
2367 }
2368 wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
2369 if (params->wpa_ie)
2370 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2371 params->wpa_ie);
2372
2373 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2374 msg = NULL;
2375 if (ret) {
2376 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2377 "(%s)", ret, strerror(-ret));
2378 goto nla_put_failure;
2379 }
2380 ret = 0;
2381 wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2382 "successfully");
2383
2384 nla_put_failure:
2385 nlmsg_free(msg);
2386 return ret;
2387 }
2388
2389
2390 /**
2391 * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2392 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
2393 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2394 * Returns: 0 on success, -1 on failure
2395 */
2396 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
2397 {
2398 struct wpa_driver_nl80211_data *drv = priv;
2399 int ret = -1, flags;
2400 struct nl_msg *msg;
2401
2402 msg = nlmsg_alloc();
2403 if (!msg)
2404 return -1;
2405
2406 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2407 0, NL80211_CMD_SET_INTERFACE, 0);
2408 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2409 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2410 mode ? NL80211_IFTYPE_ADHOC : NL80211_IFTYPE_STATION);
2411
2412 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2413 if (!ret)
2414 return 0;
2415 else
2416 goto try_again;
2417
2418 nla_put_failure:
2419 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode");
2420 return -1;
2421
2422 try_again:
2423 /* mac80211 doesn't allow mode changes while the device is up, so
2424 * take the device down, try to set the mode again, and bring the
2425 * device back up.
2426 */
2427 if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) {
2428 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
2429
2430 /* Try to set the mode again while the interface is down */
2431 msg = nlmsg_alloc();
2432 if (!msg)
2433 return -1;
2434
2435 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2436 0, NL80211_CMD_SET_INTERFACE, 0);
2437 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2438 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2439 mode ? NL80211_IFTYPE_ADHOC :
2440 NL80211_IFTYPE_STATION);
2441 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2442 if (ret) {
2443 wpa_printf(MSG_ERROR, "Failed to set interface %s "
2444 "mode", drv->ifname);
2445 }
2446
2447 /* Ignore return value of get_ifflags to ensure that the device
2448 * is always up like it was before this function was called.
2449 */
2450 (void) wpa_driver_nl80211_get_ifflags(drv, &flags);
2451 (void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP);
2452 }
2453
2454 return ret;
2455 }
2456
2457
2458 #ifdef WEXT_COMPAT
2459
2460 static int wpa_driver_nl80211_pmksa(struct wpa_driver_nl80211_data *drv,
2461 u32 cmd, const u8 *bssid, const u8 *pmkid)
2462 {
2463 struct iwreq iwr;
2464 struct iw_pmksa pmksa;
2465 int ret = 0;
2466
2467 os_memset(&iwr, 0, sizeof(iwr));
2468 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2469 os_memset(&pmksa, 0, sizeof(pmksa));
2470 pmksa.cmd = cmd;
2471 pmksa.bssid.sa_family = ARPHRD_ETHER;
2472 if (bssid)
2473 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2474 if (pmkid)
2475 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2476 iwr.u.data.pointer = (caddr_t) &pmksa;
2477 iwr.u.data.length = sizeof(pmksa);
2478
2479 if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2480 if (errno != EOPNOTSUPP)
2481 perror("ioctl[SIOCSIWPMKSA]");
2482 ret = -1;
2483 }
2484
2485 return ret;
2486 }
2487
2488
2489 static int wpa_driver_nl80211_add_pmkid(void *priv, const u8 *bssid,
2490 const u8 *pmkid)
2491 {
2492 struct wpa_driver_nl80211_data *drv = priv;
2493 return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2494 }
2495
2496
2497 static int wpa_driver_nl80211_remove_pmkid(void *priv, const u8 *bssid,
2498 const u8 *pmkid)
2499 {
2500 struct wpa_driver_nl80211_data *drv = priv;
2501 return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2502 }
2503
2504
2505 static int wpa_driver_nl80211_flush_pmkid(void *priv)
2506 {
2507 struct wpa_driver_nl80211_data *drv = priv;
2508 return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2509 }
2510
2511 #endif /* WEXT_COMPAT */
2512
2513
2514 static int wpa_driver_nl80211_get_capa(void *priv,
2515 struct wpa_driver_capa *capa)
2516 {
2517 struct wpa_driver_nl80211_data *drv = priv;
2518 if (!drv->has_capability)
2519 return -1;
2520 os_memcpy(capa, &drv->capa, sizeof(*capa));
2521 return 0;
2522 }
2523
2524
2525 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2526 {
2527 struct wpa_driver_nl80211_data *drv = priv;
2528
2529 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2530 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2531 drv->operstate = state;
2532 return wpa_driver_nl80211_send_oper_ifla(
2533 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2534 }
2535
2536
2537 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2538 .name = "nl80211",
2539 .desc = "Linux nl80211/cfg80211",
2540 .get_bssid = wpa_driver_nl80211_get_bssid,
2541 .get_ssid = wpa_driver_nl80211_get_ssid,
2542 .set_key = wpa_driver_nl80211_set_key,
2543 .set_drop_unencrypted = wpa_driver_nl80211_set_drop_unencrypted,
2544 .scan2 = wpa_driver_nl80211_scan,
2545 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
2546 .deauthenticate = wpa_driver_nl80211_deauthenticate,
2547 .disassociate = wpa_driver_nl80211_disassociate,
2548 .set_mode = wpa_driver_nl80211_set_mode,
2549 .authenticate = wpa_driver_nl80211_authenticate,
2550 .associate = wpa_driver_nl80211_associate,
2551 .init = wpa_driver_nl80211_init,
2552 .deinit = wpa_driver_nl80211_deinit,
2553 .get_capa = wpa_driver_nl80211_get_capa,
2554 .set_operstate = wpa_driver_nl80211_set_operstate,
2555 .set_country = wpa_driver_nl80211_set_country,
2556 #ifdef WEXT_COMPAT
2557 .set_wpa = wpa_driver_nl80211_set_wpa,
2558 .set_countermeasures = wpa_driver_nl80211_set_countermeasures,
2559 .set_auth_alg = wpa_driver_nl80211_set_auth_alg,
2560 .add_pmkid = wpa_driver_nl80211_add_pmkid,
2561 .remove_pmkid = wpa_driver_nl80211_remove_pmkid,
2562 .flush_pmkid = wpa_driver_nl80211_flush_pmkid,
2563 #endif /* WEXT_COMPAT */
2564 };
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