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 #ifdef CONFIG_CLIENT_MLME
23 #include <netpacket/packet.h>
24 #include <linux/if_ether.h>
25 #include "radiotap.h"
26 #include "radiotap_iter.h"
27 #endif /* CONFIG_CLIENT_MLME */
28
29 #include "wireless_copy.h"
30 #include "common.h"
31 #include "driver.h"
32 #include "eloop.h"
33 #include "ieee802_11_defs.h"
34
35 #ifndef IFF_LOWER_UP
36 #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
37 #endif
38 #ifndef IFF_DORMANT
39 #define IFF_DORMANT 0x20000 /* driver signals dormant */
40 #endif
41
42 #ifndef IF_OPER_DORMANT
43 #define IF_OPER_DORMANT 5
44 #endif
45 #ifndef IF_OPER_UP
46 #define IF_OPER_UP 6
47 #endif
48
49
50 struct wpa_driver_nl80211_data {
51 void *ctx;
52 int wext_event_sock;
53 int ioctl_sock;
54 char ifname[IFNAMSIZ + 1];
55 int ifindex;
56 int if_removed;
57 u8 *assoc_req_ies;
58 size_t assoc_req_ies_len;
59 u8 *assoc_resp_ies;
60 size_t assoc_resp_ies_len;
61 struct wpa_driver_capa capa;
62 int has_capability;
63 int we_version_compiled;
64
65 /* for set_auth_alg fallback */
66 int use_crypt;
67 int auth_alg_fallback;
68
69 int operstate;
70
71 char mlmedev[IFNAMSIZ + 1];
72
73 int scan_complete_events;
74
75 struct nl_handle *nl_handle;
76 struct nl_cache *nl_cache;
77 struct nl_cb *nl_cb;
78 struct genl_family *nl80211;
79
80 #ifdef CONFIG_CLIENT_MLME
81 int monitor_sock; /* socket for monitor */
82 int monitor_ifidx;
83 #endif /* CONFIG_CLIENT_MLME */
84 };
85
86
87 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
88 void *timeout_ctx);
89 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
90 static int wpa_driver_nl80211_flush_pmkid(void *priv);
91 static int wpa_driver_nl80211_get_range(void *priv);
92 static void
93 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
94
95
96 /* nl80211 code */
ack_handler(struct nl_msg * msg,void * arg)97 static int ack_handler(struct nl_msg *msg, void *arg)
98 {
99 int *err = arg;
100 *err = 0;
101 return NL_STOP;
102 }
103
finish_handler(struct nl_msg * msg,void * arg)104 static int finish_handler(struct nl_msg *msg, void *arg)
105 {
106 int *ret = arg;
107 *ret = 0;
108 return NL_SKIP;
109 }
110
error_handler(struct sockaddr_nl * nla,struct nlmsgerr * err,void * arg)111 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
112 void *arg)
113 {
114 int *ret = arg;
115 *ret = err->error;
116 return NL_SKIP;
117 }
118
send_and_recv_msgs(struct wpa_driver_nl80211_data * drv,struct nl_msg * msg,int (* valid_handler)(struct nl_msg *,void *),void * valid_data)119 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
120 struct nl_msg *msg,
121 int (*valid_handler)(struct nl_msg *, void *),
122 void *valid_data)
123 {
124 struct nl_cb *cb;
125 int err = -ENOMEM;
126
127 cb = nl_cb_clone(drv->nl_cb);
128 if (!cb)
129 goto out;
130
131 err = nl_send_auto_complete(drv->nl_handle, msg);
132 if (err < 0)
133 goto out;
134
135 err = 1;
136
137 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
138 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
139 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
140
141 if (valid_handler)
142 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
143 valid_handler, valid_data);
144
145 while (err > 0)
146 nl_recvmsgs(drv->nl_handle, cb);
147 out:
148 nl_cb_put(cb);
149 nlmsg_free(msg);
150 return err;
151 }
152
153
154 struct family_data {
155 const char *group;
156 int id;
157 };
158
159
family_handler(struct nl_msg * msg,void * arg)160 static int family_handler(struct nl_msg *msg, void *arg)
161 {
162 struct family_data *res = arg;
163 struct nlattr *tb[CTRL_ATTR_MAX + 1];
164 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
165 struct nlattr *mcgrp;
166 int i;
167
168 nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
169 genlmsg_attrlen(gnlh, 0), NULL);
170 if (!tb[CTRL_ATTR_MCAST_GROUPS])
171 return NL_SKIP;
172
173 nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
174 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
175 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
176 nla_len(mcgrp), NULL);
177 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
178 !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
179 os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
180 res->group,
181 nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
182 continue;
183 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
184 break;
185 };
186
187 return NL_SKIP;
188 }
189
190
nl_get_multicast_id(struct wpa_driver_nl80211_data * drv,const char * family,const char * group)191 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
192 const char *family, const char *group)
193 {
194 struct nl_msg *msg;
195 int ret = -1;
196 struct family_data res = { group, -ENOENT };
197
198 msg = nlmsg_alloc();
199 if (!msg)
200 return -ENOMEM;
201 genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
202 0, 0, CTRL_CMD_GETFAMILY, 0);
203 NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
204
205 ret = send_and_recv_msgs(drv, msg, family_handler, &res);
206 msg = NULL;
207 if (ret == 0)
208 ret = res.id;
209
210 nla_put_failure:
211 nlmsg_free(msg);
212 return ret;
213 }
214
215
wpa_driver_nl80211_send_oper_ifla(struct wpa_driver_nl80211_data * drv,int linkmode,int operstate)216 static int wpa_driver_nl80211_send_oper_ifla(
217 struct wpa_driver_nl80211_data *drv,
218 int linkmode, int operstate)
219 {
220 struct {
221 struct nlmsghdr hdr;
222 struct ifinfomsg ifinfo;
223 char opts[16];
224 } req;
225 struct rtattr *rta;
226 static int nl_seq;
227 ssize_t ret;
228
229 os_memset(&req, 0, sizeof(req));
230
231 req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
232 req.hdr.nlmsg_type = RTM_SETLINK;
233 req.hdr.nlmsg_flags = NLM_F_REQUEST;
234 req.hdr.nlmsg_seq = ++nl_seq;
235 req.hdr.nlmsg_pid = 0;
236
237 req.ifinfo.ifi_family = AF_UNSPEC;
238 req.ifinfo.ifi_type = 0;
239 req.ifinfo.ifi_index = drv->ifindex;
240 req.ifinfo.ifi_flags = 0;
241 req.ifinfo.ifi_change = 0;
242
243 if (linkmode != -1) {
244 rta = aliasing_hide_typecast(
245 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
246 struct rtattr);
247 rta->rta_type = IFLA_LINKMODE;
248 rta->rta_len = RTA_LENGTH(sizeof(char));
249 *((char *) RTA_DATA(rta)) = linkmode;
250 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
251 RTA_LENGTH(sizeof(char));
252 }
253 if (operstate != -1) {
254 rta = (struct rtattr *)
255 ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
256 rta->rta_type = IFLA_OPERSTATE;
257 rta->rta_len = RTA_LENGTH(sizeof(char));
258 *((char *) RTA_DATA(rta)) = operstate;
259 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
260 RTA_LENGTH(sizeof(char));
261 }
262
263 wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
264 linkmode, operstate);
265
266 ret = send(drv->wext_event_sock, &req, req.hdr.nlmsg_len, 0);
267 if (ret < 0) {
268 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
269 "%s (assume operstate is not supported)",
270 strerror(errno));
271 }
272
273 return ret < 0 ? -1 : 0;
274 }
275
276
wpa_driver_nl80211_set_auth_param(struct wpa_driver_nl80211_data * drv,int idx,u32 value)277 static int wpa_driver_nl80211_set_auth_param(
278 struct wpa_driver_nl80211_data *drv, int idx, u32 value)
279 {
280 struct iwreq iwr;
281 int ret = 0;
282
283 os_memset(&iwr, 0, sizeof(iwr));
284 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
285 iwr.u.param.flags = idx & IW_AUTH_INDEX;
286 iwr.u.param.value = value;
287
288 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
289 if (errno != EOPNOTSUPP) {
290 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
291 "value 0x%x) failed: %s)",
292 idx, value, strerror(errno));
293 }
294 ret = errno == EOPNOTSUPP ? -2 : -1;
295 }
296
297 return ret;
298 }
299
300
wpa_driver_nl80211_get_bssid(void * priv,u8 * bssid)301 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
302 {
303 struct wpa_driver_nl80211_data *drv = priv;
304 struct iwreq iwr;
305 int ret = 0;
306
307 os_memset(&iwr, 0, sizeof(iwr));
308 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
309
310 if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
311 perror("ioctl[SIOCGIWAP]");
312 ret = -1;
313 }
314 os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
315
316 return ret;
317 }
318
319
wpa_driver_nl80211_set_bssid(void * priv,const u8 * bssid)320 static int wpa_driver_nl80211_set_bssid(void *priv, const u8 *bssid)
321 {
322 struct wpa_driver_nl80211_data *drv = priv;
323 struct iwreq iwr;
324 int ret = 0;
325
326 os_memset(&iwr, 0, sizeof(iwr));
327 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
328 iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
329 if (bssid)
330 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
331 else
332 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
333
334 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
335 perror("ioctl[SIOCSIWAP]");
336 ret = -1;
337 }
338
339 return ret;
340 }
341
342
wpa_driver_nl80211_get_ssid(void * priv,u8 * ssid)343 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
344 {
345 struct wpa_driver_nl80211_data *drv = priv;
346 struct iwreq iwr;
347 int ret = 0;
348
349 os_memset(&iwr, 0, sizeof(iwr));
350 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
351 iwr.u.essid.pointer = (caddr_t) ssid;
352 iwr.u.essid.length = 32;
353
354 if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
355 perror("ioctl[SIOCGIWESSID]");
356 ret = -1;
357 } else {
358 ret = iwr.u.essid.length;
359 if (ret > 32)
360 ret = 32;
361 /* Some drivers include nul termination in the SSID, so let's
362 * remove it here before further processing. WE-21 changes this
363 * to explicitly require the length _not_ to include nul
364 * termination. */
365 if (ret > 0 && ssid[ret - 1] == '\0' &&
366 drv->we_version_compiled < 21)
367 ret--;
368 }
369
370 return ret;
371 }
372
373
wpa_driver_nl80211_set_ssid(void * priv,const u8 * ssid,size_t ssid_len)374 static int wpa_driver_nl80211_set_ssid(void *priv, const u8 *ssid,
375 size_t ssid_len)
376 {
377 struct wpa_driver_nl80211_data *drv = priv;
378 struct iwreq iwr;
379 int ret = 0;
380 char buf[33];
381
382 if (ssid_len > 32)
383 return -1;
384
385 os_memset(&iwr, 0, sizeof(iwr));
386 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
387 /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
388 iwr.u.essid.flags = (ssid_len != 0);
389 os_memset(buf, 0, sizeof(buf));
390 os_memcpy(buf, ssid, ssid_len);
391 iwr.u.essid.pointer = (caddr_t) buf;
392 if (drv->we_version_compiled < 21) {
393 /* For historic reasons, set SSID length to include one extra
394 * character, C string nul termination, even though SSID is
395 * really an octet string that should not be presented as a C
396 * string. Some Linux drivers decrement the length by one and
397 * can thus end up missing the last octet of the SSID if the
398 * length is not incremented here. WE-21 changes this to
399 * explicitly require the length _not_ to include nul
400 * termination. */
401 if (ssid_len)
402 ssid_len++;
403 }
404 iwr.u.essid.length = ssid_len;
405
406 if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
407 perror("ioctl[SIOCSIWESSID]");
408 ret = -1;
409 }
410
411 return ret;
412 }
413
414
wpa_driver_nl80211_set_freq(void * priv,int freq)415 static int wpa_driver_nl80211_set_freq(void *priv, int freq)
416 {
417 struct wpa_driver_nl80211_data *drv = priv;
418 struct iwreq iwr;
419 int ret = 0;
420
421 os_memset(&iwr, 0, sizeof(iwr));
422 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
423 iwr.u.freq.m = freq * 100000;
424 iwr.u.freq.e = 1;
425
426 if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
427 perror("ioctl[SIOCSIWFREQ]");
428 ret = -1;
429 }
430
431 return ret;
432 }
433
434
435 static void
wpa_driver_nl80211_event_wireless_custom(void * ctx,char * custom)436 wpa_driver_nl80211_event_wireless_custom(void *ctx, char *custom)
437 {
438 union wpa_event_data data;
439
440 wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
441 custom);
442
443 os_memset(&data, 0, sizeof(data));
444 /* Host AP driver */
445 if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
446 data.michael_mic_failure.unicast =
447 os_strstr(custom, " unicast ") != NULL;
448 /* TODO: parse parameters(?) */
449 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
450 } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
451 char *spos;
452 int bytes;
453
454 spos = custom + 17;
455
456 bytes = strspn(spos, "0123456789abcdefABCDEF");
457 if (!bytes || (bytes & 1))
458 return;
459 bytes /= 2;
460
461 data.assoc_info.req_ies = os_malloc(bytes);
462 if (data.assoc_info.req_ies == NULL)
463 return;
464
465 data.assoc_info.req_ies_len = bytes;
466 hexstr2bin(spos, data.assoc_info.req_ies, bytes);
467
468 spos += bytes * 2;
469
470 data.assoc_info.resp_ies = NULL;
471 data.assoc_info.resp_ies_len = 0;
472
473 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
474 spos += 9;
475
476 bytes = strspn(spos, "0123456789abcdefABCDEF");
477 if (!bytes || (bytes & 1))
478 goto done;
479 bytes /= 2;
480
481 data.assoc_info.resp_ies = os_malloc(bytes);
482 if (data.assoc_info.resp_ies == NULL)
483 goto done;
484
485 data.assoc_info.resp_ies_len = bytes;
486 hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
487 }
488
489 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
490
491 done:
492 os_free(data.assoc_info.resp_ies);
493 os_free(data.assoc_info.req_ies);
494 #ifdef CONFIG_PEERKEY
495 } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
496 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
497 wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
498 "STKSTART.request '%s'", custom + 17);
499 return;
500 }
501 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
502 #endif /* CONFIG_PEERKEY */
503 }
504 }
505
506
wpa_driver_nl80211_event_wireless_michaelmicfailure(void * ctx,const char * ev,size_t len)507 static int wpa_driver_nl80211_event_wireless_michaelmicfailure(
508 void *ctx, const char *ev, size_t len)
509 {
510 const struct iw_michaelmicfailure *mic;
511 union wpa_event_data data;
512
513 if (len < sizeof(*mic))
514 return -1;
515
516 mic = (const struct iw_michaelmicfailure *) ev;
517
518 wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
519 "flags=0x%x src_addr=" MACSTR, mic->flags,
520 MAC2STR(mic->src_addr.sa_data));
521
522 os_memset(&data, 0, sizeof(data));
523 data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
524 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
525
526 return 0;
527 }
528
529
wpa_driver_nl80211_event_wireless_pmkidcand(struct wpa_driver_nl80211_data * drv,const char * ev,size_t len)530 static int wpa_driver_nl80211_event_wireless_pmkidcand(
531 struct wpa_driver_nl80211_data *drv, const char *ev, size_t len)
532 {
533 const struct iw_pmkid_cand *cand;
534 union wpa_event_data data;
535 const u8 *addr;
536
537 if (len < sizeof(*cand))
538 return -1;
539
540 cand = (const struct iw_pmkid_cand *) ev;
541 addr = (const u8 *) cand->bssid.sa_data;
542
543 wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
544 "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
545 cand->index, MAC2STR(addr));
546
547 os_memset(&data, 0, sizeof(data));
548 os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
549 data.pmkid_candidate.index = cand->index;
550 data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
551 wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
552
553 return 0;
554 }
555
556
wpa_driver_nl80211_event_wireless_assocreqie(struct wpa_driver_nl80211_data * drv,const char * ev,int len)557 static int wpa_driver_nl80211_event_wireless_assocreqie(
558 struct wpa_driver_nl80211_data *drv, const char *ev, int len)
559 {
560 if (len < 0)
561 return -1;
562
563 wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
564 len);
565 os_free(drv->assoc_req_ies);
566 drv->assoc_req_ies = os_malloc(len);
567 if (drv->assoc_req_ies == NULL) {
568 drv->assoc_req_ies_len = 0;
569 return -1;
570 }
571 os_memcpy(drv->assoc_req_ies, ev, len);
572 drv->assoc_req_ies_len = len;
573
574 return 0;
575 }
576
577
wpa_driver_nl80211_event_wireless_assocrespie(struct wpa_driver_nl80211_data * drv,const char * ev,int len)578 static int wpa_driver_nl80211_event_wireless_assocrespie(
579 struct wpa_driver_nl80211_data *drv, const char *ev, int len)
580 {
581 if (len < 0)
582 return -1;
583
584 wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
585 len);
586 os_free(drv->assoc_resp_ies);
587 drv->assoc_resp_ies = os_malloc(len);
588 if (drv->assoc_resp_ies == NULL) {
589 drv->assoc_resp_ies_len = 0;
590 return -1;
591 }
592 os_memcpy(drv->assoc_resp_ies, ev, len);
593 drv->assoc_resp_ies_len = len;
594
595 return 0;
596 }
597
598
wpa_driver_nl80211_event_assoc_ies(struct wpa_driver_nl80211_data * drv)599 static void wpa_driver_nl80211_event_assoc_ies(struct wpa_driver_nl80211_data *drv)
600 {
601 union wpa_event_data data;
602
603 if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
604 return;
605
606 os_memset(&data, 0, sizeof(data));
607 if (drv->assoc_req_ies) {
608 data.assoc_info.req_ies = drv->assoc_req_ies;
609 drv->assoc_req_ies = NULL;
610 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
611 }
612 if (drv->assoc_resp_ies) {
613 data.assoc_info.resp_ies = drv->assoc_resp_ies;
614 drv->assoc_resp_ies = NULL;
615 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
616 }
617
618 wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
619
620 os_free(data.assoc_info.req_ies);
621 os_free(data.assoc_info.resp_ies);
622 }
623
624
wpa_driver_nl80211_event_wireless(struct wpa_driver_nl80211_data * drv,void * ctx,char * data,int len)625 static void wpa_driver_nl80211_event_wireless(struct wpa_driver_nl80211_data *drv,
626 void *ctx, char *data, int len)
627 {
628 struct iw_event iwe_buf, *iwe = &iwe_buf;
629 char *pos, *end, *custom, *buf;
630
631 pos = data;
632 end = data + len;
633
634 while (pos + IW_EV_LCP_LEN <= end) {
635 /* Event data may be unaligned, so make a local, aligned copy
636 * before processing. */
637 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
638 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
639 iwe->cmd, iwe->len);
640 if (iwe->len <= IW_EV_LCP_LEN)
641 return;
642
643 custom = pos + IW_EV_POINT_LEN;
644 if (drv->we_version_compiled > 18 &&
645 (iwe->cmd == IWEVMICHAELMICFAILURE ||
646 iwe->cmd == IWEVCUSTOM ||
647 iwe->cmd == IWEVASSOCREQIE ||
648 iwe->cmd == IWEVASSOCRESPIE ||
649 iwe->cmd == IWEVPMKIDCAND)) {
650 /* WE-19 removed the pointer from struct iw_point */
651 char *dpos = (char *) &iwe_buf.u.data.length;
652 int dlen = dpos - (char *) &iwe_buf;
653 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
654 sizeof(struct iw_event) - dlen);
655 } else {
656 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
657 custom += IW_EV_POINT_OFF;
658 }
659
660 switch (iwe->cmd) {
661 case SIOCGIWAP:
662 wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
663 MACSTR,
664 MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
665 if (is_zero_ether_addr(
666 (const u8 *) iwe->u.ap_addr.sa_data) ||
667 os_memcmp(iwe->u.ap_addr.sa_data,
668 "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
669 0) {
670 os_free(drv->assoc_req_ies);
671 drv->assoc_req_ies = NULL;
672 os_free(drv->assoc_resp_ies);
673 drv->assoc_resp_ies = NULL;
674 wpa_supplicant_event(ctx, EVENT_DISASSOC,
675 NULL);
676
677 } else {
678 wpa_driver_nl80211_event_assoc_ies(drv);
679 wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
680 }
681 break;
682 case IWEVMICHAELMICFAILURE:
683 wpa_driver_nl80211_event_wireless_michaelmicfailure(
684 ctx, custom, iwe->u.data.length);
685 break;
686 case IWEVCUSTOM:
687 if (custom + iwe->u.data.length > end)
688 return;
689 buf = os_malloc(iwe->u.data.length + 1);
690 if (buf == NULL)
691 return;
692 os_memcpy(buf, custom, iwe->u.data.length);
693 buf[iwe->u.data.length] = '\0';
694 wpa_driver_nl80211_event_wireless_custom(ctx, buf);
695 os_free(buf);
696 break;
697 case IWEVASSOCREQIE:
698 wpa_driver_nl80211_event_wireless_assocreqie(
699 drv, custom, iwe->u.data.length);
700 break;
701 case IWEVASSOCRESPIE:
702 wpa_driver_nl80211_event_wireless_assocrespie(
703 drv, custom, iwe->u.data.length);
704 break;
705 case IWEVPMKIDCAND:
706 wpa_driver_nl80211_event_wireless_pmkidcand(
707 drv, custom, iwe->u.data.length);
708 break;
709 }
710
711 pos += iwe->len;
712 }
713 }
714
715
wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data * drv,void * ctx,char * buf,size_t len,int del)716 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
717 void *ctx, char *buf, size_t len,
718 int del)
719 {
720 union wpa_event_data event;
721
722 os_memset(&event, 0, sizeof(event));
723 if (len > sizeof(event.interface_status.ifname))
724 len = sizeof(event.interface_status.ifname) - 1;
725 os_memcpy(event.interface_status.ifname, buf, len);
726 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
727 EVENT_INTERFACE_ADDED;
728
729 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
730 del ? "DEL" : "NEW",
731 event.interface_status.ifname,
732 del ? "removed" : "added");
733
734 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
735 if (del)
736 drv->if_removed = 1;
737 else
738 drv->if_removed = 0;
739 }
740
741 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
742 }
743
744
wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data * drv,struct nlmsghdr * h)745 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
746 struct nlmsghdr *h)
747 {
748 struct ifinfomsg *ifi;
749 int attrlen, _nlmsg_len, rta_len;
750 struct rtattr *attr;
751
752 ifi = NLMSG_DATA(h);
753
754 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
755
756 attrlen = h->nlmsg_len - _nlmsg_len;
757 if (attrlen < 0)
758 return 0;
759
760 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
761
762 rta_len = RTA_ALIGN(sizeof(struct rtattr));
763 while (RTA_OK(attr, attrlen)) {
764 if (attr->rta_type == IFLA_IFNAME) {
765 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
766 == 0)
767 return 1;
768 else
769 break;
770 }
771 attr = RTA_NEXT(attr, attrlen);
772 }
773
774 return 0;
775 }
776
777
wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data * drv,int ifindex,struct nlmsghdr * h)778 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
779 int ifindex, struct nlmsghdr *h)
780 {
781 if (drv->ifindex == ifindex)
782 return 1;
783
784 if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
785 drv->ifindex = if_nametoindex(drv->ifname);
786 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
787 "interface");
788 wpa_driver_nl80211_finish_drv_init(drv);
789 return 1;
790 }
791
792 return 0;
793 }
794
795
wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data * drv,void * ctx,struct nlmsghdr * h,size_t len)796 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
797 void *ctx, struct nlmsghdr *h,
798 size_t len)
799 {
800 struct ifinfomsg *ifi;
801 int attrlen, _nlmsg_len, rta_len;
802 struct rtattr * attr;
803
804 if (len < sizeof(*ifi))
805 return;
806
807 ifi = NLMSG_DATA(h);
808
809 if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
810 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
811 ifi->ifi_index);
812 return;
813 }
814
815 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
816 "(%s%s%s%s)",
817 drv->operstate, ifi->ifi_flags,
818 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
819 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
820 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
821 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
822 /*
823 * Some drivers send the association event before the operup event--in
824 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
825 * fails. This will hit us when wpa_supplicant does not need to do
826 * IEEE 802.1X authentication
827 */
828 if (drv->operstate == 1 &&
829 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
830 !(ifi->ifi_flags & IFF_RUNNING))
831 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
832
833 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
834
835 attrlen = h->nlmsg_len - _nlmsg_len;
836 if (attrlen < 0)
837 return;
838
839 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
840
841 rta_len = RTA_ALIGN(sizeof(struct rtattr));
842 while (RTA_OK(attr, attrlen)) {
843 if (attr->rta_type == IFLA_WIRELESS) {
844 wpa_driver_nl80211_event_wireless(
845 drv, ctx, ((char *) attr) + rta_len,
846 attr->rta_len - rta_len);
847 } else if (attr->rta_type == IFLA_IFNAME) {
848 wpa_driver_nl80211_event_link(
849 drv, ctx,
850 ((char *) attr) + rta_len,
851 attr->rta_len - rta_len, 0);
852 }
853 attr = RTA_NEXT(attr, attrlen);
854 }
855 }
856
857
wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data * drv,void * ctx,struct nlmsghdr * h,size_t len)858 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
859 void *ctx, struct nlmsghdr *h,
860 size_t len)
861 {
862 struct ifinfomsg *ifi;
863 int attrlen, _nlmsg_len, rta_len;
864 struct rtattr * attr;
865
866 if (len < sizeof(*ifi))
867 return;
868
869 ifi = NLMSG_DATA(h);
870
871 _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
872
873 attrlen = h->nlmsg_len - _nlmsg_len;
874 if (attrlen < 0)
875 return;
876
877 attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
878
879 rta_len = RTA_ALIGN(sizeof(struct rtattr));
880 while (RTA_OK(attr, attrlen)) {
881 if (attr->rta_type == IFLA_IFNAME) {
882 wpa_driver_nl80211_event_link(
883 drv, ctx,
884 ((char *) attr) + rta_len,
885 attr->rta_len - rta_len, 1);
886 }
887 attr = RTA_NEXT(attr, attrlen);
888 }
889 }
890
891
wpa_driver_nl80211_event_receive_wext(int sock,void * eloop_ctx,void * sock_ctx)892 static void wpa_driver_nl80211_event_receive_wext(int sock, void *eloop_ctx,
893 void *sock_ctx)
894 {
895 char buf[8192];
896 int left;
897 struct sockaddr_nl from;
898 socklen_t fromlen;
899 struct nlmsghdr *h;
900 int max_events = 10;
901
902 try_again:
903 fromlen = sizeof(from);
904 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
905 (struct sockaddr *) &from, &fromlen);
906 if (left < 0) {
907 if (errno != EINTR && errno != EAGAIN)
908 perror("recvfrom(netlink)");
909 return;
910 }
911
912 h = (struct nlmsghdr *) buf;
913 while (left >= (int) sizeof(*h)) {
914 int len, plen;
915
916 len = h->nlmsg_len;
917 plen = len - sizeof(*h);
918 if (len > left || plen < 0) {
919 wpa_printf(MSG_DEBUG, "Malformed netlink message: "
920 "len=%d left=%d plen=%d",
921 len, left, plen);
922 break;
923 }
924
925 switch (h->nlmsg_type) {
926 case RTM_NEWLINK:
927 wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
928 h, plen);
929 break;
930 case RTM_DELLINK:
931 wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
932 h, plen);
933 break;
934 }
935
936 len = NLMSG_ALIGN(len);
937 left -= len;
938 h = (struct nlmsghdr *) ((char *) h + len);
939 }
940
941 if (left > 0) {
942 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
943 "message", left);
944 }
945
946 if (--max_events > 0) {
947 /*
948 * Try to receive all events in one eloop call in order to
949 * limit race condition on cases where AssocInfo event, Assoc
950 * event, and EAPOL frames are received more or less at the
951 * same time. We want to process the event messages first
952 * before starting EAPOL processing.
953 */
954 goto try_again;
955 }
956 }
957
958
no_seq_check(struct nl_msg * msg,void * arg)959 static int no_seq_check(struct nl_msg *msg, void *arg)
960 {
961 return NL_OK;
962 }
963
964
process_event(struct nl_msg * msg,void * arg)965 static int process_event(struct nl_msg *msg, void *arg)
966 {
967 struct wpa_driver_nl80211_data *drv = arg;
968 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
969 struct nlattr *tb[NL80211_ATTR_MAX + 1];
970
971 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
972 genlmsg_attrlen(gnlh, 0), NULL);
973
974 if (tb[NL80211_ATTR_IFINDEX]) {
975 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
976 if (ifindex != drv->ifindex) {
977 wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
978 " for foreign interface (ifindex %d)",
979 gnlh->cmd, ifindex);
980 return NL_SKIP;
981 }
982 }
983
984 switch (gnlh->cmd) {
985 case NL80211_CMD_TRIGGER_SCAN:
986 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
987 break;
988 case NL80211_CMD_NEW_SCAN_RESULTS:
989 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
990 drv->scan_complete_events = 1;
991 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
992 drv->ctx);
993 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
994 break;
995 case NL80211_CMD_SCAN_ABORTED:
996 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
997 /*
998 * Need to indicate that scan results are available in order
999 * not to make wpa_supplicant stop its scanning.
1000 */
1001 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1002 drv->ctx);
1003 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
1004 break;
1005 default:
1006 wpa_printf(MSG_DEBUG, "nl0211: Ignored unknown event (cmd=%d)",
1007 gnlh->cmd);
1008 break;
1009 }
1010
1011 return NL_SKIP;
1012 }
1013
1014
wpa_driver_nl80211_event_receive(int sock,void * eloop_ctx,void * sock_ctx)1015 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
1016 void *sock_ctx)
1017 {
1018 struct nl_cb *cb;
1019 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1020
1021 wpa_printf(MSG_DEBUG, "nl80211: Event message available");
1022
1023 cb = nl_cb_clone(drv->nl_cb);
1024 if (!cb)
1025 return;
1026 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
1027 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
1028 nl_recvmsgs(drv->nl_handle, cb);
1029 nl_cb_put(cb);
1030 }
1031
1032
wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data * drv,const char * ifname,int * flags)1033 static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv,
1034 const char *ifname, int *flags)
1035 {
1036 struct ifreq ifr;
1037
1038 os_memset(&ifr, 0, sizeof(ifr));
1039 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
1040 if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
1041 perror("ioctl[SIOCGIFFLAGS]");
1042 return -1;
1043 }
1044 *flags = ifr.ifr_flags & 0xffff;
1045 return 0;
1046 }
1047
1048
1049 /**
1050 * wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS)
1051 * @drv: driver_nl80211 private data
1052 * @flags: Pointer to returned flags value
1053 * Returns: 0 on success, -1 on failure
1054 */
wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data * drv,int * flags)1055 static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv,
1056 int *flags)
1057 {
1058 return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags);
1059 }
1060
1061
wpa_driver_nl80211_set_ifflags_ifname(struct wpa_driver_nl80211_data * drv,const char * ifname,int flags)1062 static int wpa_driver_nl80211_set_ifflags_ifname(
1063 struct wpa_driver_nl80211_data *drv,
1064 const char *ifname, int flags)
1065 {
1066 struct ifreq ifr;
1067
1068 os_memset(&ifr, 0, sizeof(ifr));
1069 os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
1070 ifr.ifr_flags = flags & 0xffff;
1071 if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
1072 perror("SIOCSIFFLAGS");
1073 return -1;
1074 }
1075 return 0;
1076 }
1077
1078
1079 /**
1080 * wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS)
1081 * @drv: driver_nl80211 private data
1082 * @flags: New value for flags
1083 * Returns: 0 on success, -1 on failure
1084 */
wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data * drv,int flags)1085 static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv,
1086 int flags)
1087 {
1088 return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags);
1089 }
1090
1091
1092 /**
1093 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1094 * @priv: driver_nl80211 private data
1095 * @alpha2_arg: country to which to switch to
1096 * Returns: 0 on success, -1 on failure
1097 *
1098 * This asks nl80211 to set the regulatory domain for given
1099 * country ISO / IEC alpha2.
1100 */
wpa_driver_nl80211_set_country(void * priv,const char * alpha2_arg)1101 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1102 {
1103 struct wpa_driver_nl80211_data *drv = priv;
1104 char alpha2[3];
1105 struct nl_msg *msg;
1106
1107 msg = nlmsg_alloc();
1108 if (!msg)
1109 goto nla_put_failure;
1110
1111 alpha2[0] = alpha2_arg[0];
1112 alpha2[1] = alpha2_arg[1];
1113 alpha2[2] = '\0';
1114
1115 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1116 0, NL80211_CMD_REQ_SET_REG, 0);
1117
1118 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1119 if (send_and_recv_msgs(drv, msg, NULL, NULL))
1120 return -EINVAL;
1121 return 0;
1122 nla_put_failure:
1123 return -EINVAL;
1124 }
1125
1126
wpa_driver_nl80211_set_probe_req_ie(void * priv,const u8 * ies,size_t ies_len)1127 static int wpa_driver_nl80211_set_probe_req_ie(void *priv, const u8 *ies,
1128 size_t ies_len)
1129 {
1130 struct wpa_driver_nl80211_data *drv = priv;
1131 struct nl_msg *msg;
1132 int ret = -1;
1133
1134 msg = nlmsg_alloc();
1135 if (!msg)
1136 return -ENOMEM;
1137
1138 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1139 NL80211_CMD_SET_MGMT_EXTRA_IE, 0);
1140
1141 NLA_PUT_U8(msg, NL80211_ATTR_MGMT_SUBTYPE, 4 /* ProbeReq */);
1142 if (ies)
1143 NLA_PUT(msg, NL80211_ATTR_IE, ies_len, ies);
1144
1145 ret = 0;
1146
1147 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1148
1149 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1150 return ret;
1151
1152 nla_put_failure:
1153 return -ENOBUFS;
1154 }
1155
1156
1157 #ifdef CONFIG_CLIENT_MLME
1158
nl80211_set_vif(struct wpa_driver_nl80211_data * drv,int drop_unencrypted,int userspace_mlme)1159 static int nl80211_set_vif(struct wpa_driver_nl80211_data *drv,
1160 int drop_unencrypted, int userspace_mlme)
1161 {
1162 #ifdef NL80211_CMD_SET_VIF
1163 struct nl_msg *msg;
1164 int ret = -1;
1165
1166 msg = nlmsg_alloc();
1167 if (!msg)
1168 return -ENOMEM;
1169
1170 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1171 NL80211_CMD_SET_VIF, 0);
1172
1173 if (drop_unencrypted >= 0)
1174 NLA_PUT_U8(msg, NL80211_ATTR_VIF_DROP_UNENCRYPTED,
1175 drop_unencrypted);
1176 if (userspace_mlme >= 0)
1177 NLA_PUT_U8(msg, NL80211_ATTR_VIF_USERSPACE_MLME,
1178 userspace_mlme);
1179
1180 ret = 0;
1181
1182 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1183
1184 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1185 return ret;
1186
1187 nla_put_failure:
1188 return -ENOBUFS;
1189 #else /* NL80211_CMD_SET_VIF */
1190 return -1;
1191 #endif /* NL80211_CMD_SET_VIF */
1192 }
1193
1194
wpa_driver_nl80211_set_userspace_mlme(struct wpa_driver_nl80211_data * drv,int enabled)1195 static int wpa_driver_nl80211_set_userspace_mlme(
1196 struct wpa_driver_nl80211_data *drv, int enabled)
1197 {
1198 return nl80211_set_vif(drv, -1, enabled);
1199 }
1200
1201
nl80211_remove_iface(struct wpa_driver_nl80211_data * drv,int ifidx)1202 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
1203 int ifidx)
1204 {
1205 struct nl_msg *msg;
1206
1207 msg = nlmsg_alloc();
1208 if (!msg)
1209 goto nla_put_failure;
1210
1211 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1212 0, NL80211_CMD_DEL_INTERFACE, 0);
1213 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
1214 if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
1215 return;
1216 nla_put_failure:
1217 wpa_printf(MSG_ERROR, "nl80211: Failed to remove interface.");
1218 }
1219
1220
nl80211_create_iface(struct wpa_driver_nl80211_data * drv,const char * ifname,enum nl80211_iftype iftype)1221 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
1222 const char *ifname, enum nl80211_iftype iftype)
1223 {
1224 struct nl_msg *msg, *flags = NULL;
1225 int ifidx, err;
1226 int ret = -ENOBUFS;
1227
1228 msg = nlmsg_alloc();
1229 if (!msg)
1230 return -1;
1231
1232 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1233 0, NL80211_CMD_NEW_INTERFACE, 0);
1234 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
1235 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
1236 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
1237
1238 if (iftype == NL80211_IFTYPE_MONITOR) {
1239 flags = nlmsg_alloc();
1240 if (!flags)
1241 goto nla_put_failure;
1242
1243 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
1244
1245 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
1246
1247 nlmsg_free(flags);
1248
1249 if (err)
1250 goto nla_put_failure;
1251 }
1252
1253 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1254 if (ret) {
1255 nla_put_failure:
1256 wpa_printf(MSG_ERROR, "nl80211: Failed to create interface %d",
1257 ret);
1258 return ret;
1259 }
1260
1261 ifidx = if_nametoindex(ifname);
1262 if (ifidx <= 0)
1263 return -1;
1264
1265 return ifidx;
1266 }
1267
1268
handle_monitor_read(int sock,void * eloop_ctx,void * sock_ctx)1269 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1270 {
1271 struct wpa_driver_nl80211_data *drv = eloop_ctx;
1272 int len;
1273 unsigned char buf[3000];
1274 struct ieee80211_radiotap_iterator iter;
1275 int ret;
1276 int injected = 0, failed = 0, rxflags = 0;
1277 struct ieee80211_rx_status rx_status;
1278
1279 len = recv(sock, buf, sizeof(buf), 0);
1280 if (len < 0) {
1281 perror("recv");
1282 return;
1283 }
1284
1285 if (ieee80211_radiotap_iterator_init(&iter, (void *) buf, len)) {
1286 wpa_printf(MSG_DEBUG, "nl80211: received invalid radiotap "
1287 "frame");
1288 return;
1289 }
1290
1291 os_memset(&rx_status, 0, sizeof(rx_status));
1292
1293 while (1) {
1294 ret = ieee80211_radiotap_iterator_next(&iter);
1295 if (ret == -ENOENT)
1296 break;
1297 if (ret) {
1298 wpa_printf(MSG_DEBUG, "nl80211: received invalid "
1299 "radiotap frame (%d)", ret);
1300 return;
1301 }
1302 switch (iter.this_arg_index) {
1303 case IEEE80211_RADIOTAP_FLAGS:
1304 if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1305 len -= 4;
1306 break;
1307 case IEEE80211_RADIOTAP_RX_FLAGS:
1308 rxflags = 1;
1309 break;
1310 case IEEE80211_RADIOTAP_TX_FLAGS:
1311 injected = 1;
1312 failed = le_to_host16((*(u16 *) iter.this_arg)) &
1313 IEEE80211_RADIOTAP_F_TX_FAIL;
1314 break;
1315 case IEEE80211_RADIOTAP_DATA_RETRIES:
1316 break;
1317 case IEEE80211_RADIOTAP_CHANNEL:
1318 /* TODO convert from freq/flags to channel number
1319 * rx_status.channel = XXX;
1320 */
1321 break;
1322 case IEEE80211_RADIOTAP_RATE:
1323 break;
1324 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1325 rx_status.ssi = *iter.this_arg;
1326 break;
1327 }
1328 }
1329
1330 if (rxflags && injected)
1331 return;
1332
1333 if (!injected) {
1334 wpa_supplicant_sta_rx(drv->ctx, buf + iter.max_length,
1335 len - iter.max_length, &rx_status);
1336 } else if (failed) {
1337 /* TX failure callback */
1338 } else {
1339 /* TX success (ACK) callback */
1340 }
1341 }
1342
1343
wpa_driver_nl80211_create_monitor_interface(struct wpa_driver_nl80211_data * drv)1344 static int wpa_driver_nl80211_create_monitor_interface(
1345 struct wpa_driver_nl80211_data *drv)
1346 {
1347 char buf[IFNAMSIZ];
1348 struct sockaddr_ll ll;
1349 int optval, flags;
1350 socklen_t optlen;
1351
1352 os_snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
1353 buf[IFNAMSIZ - 1] = '\0';
1354
1355 drv->monitor_ifidx =
1356 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR);
1357
1358 if (drv->monitor_ifidx < 0)
1359 return -1;
1360
1361 if (wpa_driver_nl80211_get_ifflags_ifname(drv, buf, &flags) != 0 ||
1362 wpa_driver_nl80211_set_ifflags_ifname(drv, buf, flags | IFF_UP) !=
1363 0) {
1364 wpa_printf(MSG_ERROR, "nl80211: Could not set interface '%s' "
1365 "UP", buf);
1366 goto error;
1367 }
1368
1369 os_memset(&ll, 0, sizeof(ll));
1370 ll.sll_family = AF_PACKET;
1371 ll.sll_ifindex = drv->monitor_ifidx;
1372 drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1373 if (drv->monitor_sock < 0) {
1374 perror("socket[PF_PACKET,SOCK_RAW]");
1375 goto error;
1376 }
1377
1378 if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1379 sizeof(ll)) < 0) {
1380 perror("monitor socket bind");
1381 goto error;
1382 }
1383
1384 optlen = sizeof(optval);
1385 optval = 20;
1386 if (setsockopt
1387 (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1388 perror("Failed to set socket priority");
1389 goto error;
1390 }
1391
1392 if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1393 drv, NULL)) {
1394 wpa_printf(MSG_ERROR, "nl80211: Could not register monitor "
1395 "read socket");
1396 goto error;
1397 }
1398
1399 return 0;
1400
1401 error:
1402 nl80211_remove_iface(drv, drv->monitor_ifidx);
1403 return -1;
1404 }
1405
1406 #endif /* CONFIG_CLIENT_MLME */
1407
1408
1409 /**
1410 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1411 * @ctx: context to be used when calling wpa_supplicant functions,
1412 * e.g., wpa_supplicant_event()
1413 * @ifname: interface name, e.g., wlan0
1414 * Returns: Pointer to private data, %NULL on failure
1415 */
wpa_driver_nl80211_init(void * ctx,const char * ifname)1416 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1417 {
1418 int s, ret;
1419 struct sockaddr_nl local;
1420 struct wpa_driver_nl80211_data *drv;
1421
1422 drv = os_zalloc(sizeof(*drv));
1423 if (drv == NULL)
1424 return NULL;
1425 drv->ctx = ctx;
1426 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1427
1428 drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1429 if (drv->nl_cb == NULL) {
1430 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1431 "callbacks");
1432 goto err1;
1433 }
1434
1435 drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1436 if (drv->nl_handle == NULL) {
1437 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1438 "callbacks");
1439 goto err2;
1440 }
1441
1442 if (genl_connect(drv->nl_handle)) {
1443 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1444 "netlink");
1445 goto err3;
1446 }
1447
1448 drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1449 if (drv->nl_cache == NULL) {
1450 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1451 "netlink cache");
1452 goto err3;
1453 }
1454
1455 drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1456 if (drv->nl80211 == NULL) {
1457 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1458 "found");
1459 goto err4;
1460 }
1461
1462 ret = nl_get_multicast_id(drv, "nl80211", "scan");
1463 if (ret >= 0)
1464 ret = nl_socket_add_membership(drv->nl_handle, ret);
1465 if (ret < 0) {
1466 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1467 "membership for scan events: %d (%s)",
1468 ret, strerror(-ret));
1469 goto err4;
1470 }
1471 eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1472 wpa_driver_nl80211_event_receive, drv, ctx);
1473
1474 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1475 if (drv->ioctl_sock < 0) {
1476 perror("socket(PF_INET,SOCK_DGRAM)");
1477 goto err5;
1478 }
1479
1480 s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1481 if (s < 0) {
1482 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1483 goto err6;
1484 }
1485
1486 os_memset(&local, 0, sizeof(local));
1487 local.nl_family = AF_NETLINK;
1488 local.nl_groups = RTMGRP_LINK;
1489 if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1490 perror("bind(netlink)");
1491 close(s);
1492 goto err6;
1493 }
1494
1495 eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_wext, drv,
1496 ctx);
1497 drv->wext_event_sock = s;
1498
1499 wpa_driver_nl80211_finish_drv_init(drv);
1500
1501 return drv;
1502
1503 err6:
1504 close(drv->ioctl_sock);
1505 err5:
1506 genl_family_put(drv->nl80211);
1507 err4:
1508 nl_cache_free(drv->nl_cache);
1509 err3:
1510 nl_handle_destroy(drv->nl_handle);
1511 err2:
1512 nl_cb_put(drv->nl_cb);
1513 err1:
1514 os_free(drv);
1515 return NULL;
1516 }
1517
1518
1519 static void
wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data * drv)1520 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1521 {
1522 int flags;
1523
1524 drv->ifindex = if_nametoindex(drv->ifname);
1525
1526 if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1527 printf("Could not configure driver to use managed mode\n");
1528 }
1529
1530 if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0)
1531 printf("Could not get interface '%s' flags\n", drv->ifname);
1532 else if (!(flags & IFF_UP)) {
1533 if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
1534 printf("Could not set interface '%s' UP\n",
1535 drv->ifname);
1536 }
1537 }
1538
1539 /*
1540 * Make sure that the driver does not have any obsolete PMKID entries.
1541 */
1542 wpa_driver_nl80211_flush_pmkid(drv);
1543
1544 wpa_driver_nl80211_get_range(drv);
1545
1546 wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1547 }
1548
1549
1550 /**
1551 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1552 * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1553 *
1554 * Shut down driver interface and processing of driver events. Free
1555 * private data buffer if one was allocated in wpa_driver_nl80211_init().
1556 */
wpa_driver_nl80211_deinit(void * priv)1557 static void wpa_driver_nl80211_deinit(void *priv)
1558 {
1559 struct wpa_driver_nl80211_data *drv = priv;
1560 int flags;
1561
1562 #ifdef CONFIG_CLIENT_MLME
1563 if (drv->monitor_sock >= 0) {
1564 eloop_unregister_read_sock(drv->monitor_sock);
1565 close(drv->monitor_sock);
1566 }
1567 if (drv->monitor_ifidx > 0)
1568 nl80211_remove_iface(drv, drv->monitor_ifidx);
1569 if (drv->capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1570 wpa_driver_nl80211_set_userspace_mlme(drv, 0);
1571 #endif /* CONFIG_CLIENT_MLME */
1572
1573 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1574
1575 /*
1576 * Clear possibly configured driver parameters in order to make it
1577 * easier to use the driver after wpa_supplicant has been terminated.
1578 */
1579 (void) wpa_driver_nl80211_set_bssid(drv,
1580 (u8 *) "\x00\x00\x00\x00\x00\x00");
1581
1582 wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1583
1584 eloop_unregister_read_sock(drv->wext_event_sock);
1585
1586 if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0)
1587 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
1588
1589 close(drv->wext_event_sock);
1590 close(drv->ioctl_sock);
1591 os_free(drv->assoc_req_ies);
1592 os_free(drv->assoc_resp_ies);
1593
1594 eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1595 genl_family_put(drv->nl80211);
1596 nl_cache_free(drv->nl_cache);
1597 nl_handle_destroy(drv->nl_handle);
1598 nl_cb_put(drv->nl_cb);
1599
1600 os_free(drv);
1601 }
1602
1603
1604 /**
1605 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1606 * @eloop_ctx: Unused
1607 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1608 *
1609 * This function can be used as registered timeout when starting a scan to
1610 * generate a scan completed event if the driver does not report this.
1611 */
wpa_driver_nl80211_scan_timeout(void * eloop_ctx,void * timeout_ctx)1612 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1613 {
1614 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1615 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1616 }
1617
1618
1619 /**
1620 * wpa_driver_nl80211_scan - Request the driver to initiate scan
1621 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1622 * @ssid: Specific SSID to scan for (ProbeReq) or %NULL to scan for
1623 * all SSIDs (either active scan with broadcast SSID or passive
1624 * scan
1625 * @ssid_len: Length of the SSID
1626 * Returns: 0 on success, -1 on failure
1627 */
wpa_driver_nl80211_scan(void * priv,const u8 * ssid,size_t ssid_len)1628 static int wpa_driver_nl80211_scan(void *priv, const u8 *ssid, size_t ssid_len)
1629 {
1630 struct wpa_driver_nl80211_data *drv = priv;
1631 int ret = 0, timeout;
1632 struct nl_msg *msg, *ssids;
1633
1634 msg = nlmsg_alloc();
1635 ssids = nlmsg_alloc();
1636 if (!msg || !ssids) {
1637 nlmsg_free(msg);
1638 nlmsg_free(ssids);
1639 return -1;
1640 }
1641
1642 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1643 NL80211_CMD_TRIGGER_SCAN, 0);
1644
1645 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1646
1647 if (ssid && ssid_len) {
1648 /* Request an active scan for a specific SSID */
1649 NLA_PUT(ssids, 1, ssid_len, ssid);
1650 } else {
1651 /* Request an active scan for wildcard SSID */
1652 NLA_PUT(ssids, 1, 0, "");
1653 }
1654 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1655
1656 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1657 msg = NULL;
1658 if (ret) {
1659 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1660 "(%s)", ret, strerror(-ret));
1661 goto nla_put_failure;
1662 }
1663
1664 /* Not all drivers generate "scan completed" wireless event, so try to
1665 * read results after a timeout. */
1666 timeout = 10;
1667 if (drv->scan_complete_events) {
1668 /*
1669 * The driver seems to deliver SIOCGIWSCAN events to notify
1670 * when scan is complete, so use longer timeout to avoid race
1671 * conditions with scanning and following association request.
1672 */
1673 timeout = 30;
1674 }
1675 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1676 "seconds", ret, timeout);
1677 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1678 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1679 drv, drv->ctx);
1680
1681 nla_put_failure:
1682 nlmsg_free(ssids);
1683 nlmsg_free(msg);
1684 return ret;
1685 }
1686
1687
bss_info_handler(struct nl_msg * msg,void * arg)1688 static int bss_info_handler(struct nl_msg *msg, void *arg)
1689 {
1690 struct nlattr *tb[NL80211_ATTR_MAX + 1];
1691 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1692 struct nlattr *bss[NL80211_BSS_MAX + 1];
1693 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1694 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1695 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1696 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1697 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1698 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1699 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1700 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1701 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1702 };
1703 struct wpa_scan_results *res = arg;
1704 struct wpa_scan_res **tmp;
1705 struct wpa_scan_res *r;
1706 const u8 *ie;
1707 size_t ie_len;
1708
1709 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1710 genlmsg_attrlen(gnlh, 0), NULL);
1711 if (!tb[NL80211_ATTR_BSS])
1712 return NL_SKIP;
1713 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1714 bss_policy))
1715 return NL_SKIP;
1716 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1717 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1718 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1719 } else {
1720 ie = NULL;
1721 ie_len = 0;
1722 }
1723
1724 r = os_zalloc(sizeof(*r) + ie_len);
1725 if (r == NULL)
1726 return NL_SKIP;
1727 if (bss[NL80211_BSS_BSSID])
1728 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1729 ETH_ALEN);
1730 if (bss[NL80211_BSS_FREQUENCY])
1731 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1732 if (bss[NL80211_BSS_BEACON_INTERVAL])
1733 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1734 if (bss[NL80211_BSS_CAPABILITY])
1735 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1736 if (bss[NL80211_BSS_SIGNAL_UNSPEC])
1737 r->qual = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1738 if (bss[NL80211_BSS_SIGNAL_MBM])
1739 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1740 if (bss[NL80211_BSS_TSF])
1741 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1742 r->ie_len = ie_len;
1743 if (ie)
1744 os_memcpy(r + 1, ie, ie_len);
1745
1746 tmp = os_realloc(res->res,
1747 (res->num + 1) * sizeof(struct wpa_scan_res *));
1748 if (tmp == NULL) {
1749 os_free(r);
1750 return NL_SKIP;
1751 }
1752 tmp[res->num++] = r;
1753 res->res = tmp;
1754
1755 return NL_SKIP;
1756 }
1757
1758
1759 /**
1760 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1761 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1762 * Returns: Scan results on success, -1 on failure
1763 */
1764 static struct wpa_scan_results *
wpa_driver_nl80211_get_scan_results(void * priv)1765 wpa_driver_nl80211_get_scan_results(void *priv)
1766 {
1767 struct wpa_driver_nl80211_data *drv = priv;
1768 struct nl_msg *msg;
1769 struct wpa_scan_results *res;
1770 int ret;
1771
1772 res = os_zalloc(sizeof(*res));
1773 if (res == NULL)
1774 return 0;
1775 msg = nlmsg_alloc();
1776 if (!msg)
1777 goto nla_put_failure;
1778
1779 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1780 NL80211_CMD_GET_SCAN, 0);
1781 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1782
1783 ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1784 msg = NULL;
1785 if (ret == 0) {
1786 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1787 (unsigned long) res->num);
1788 return res;
1789 }
1790 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1791 "(%s)", ret, strerror(-ret));
1792 nla_put_failure:
1793 nlmsg_free(msg);
1794 wpa_scan_results_free(res);
1795 return NULL;
1796 }
1797
1798
wpa_driver_nl80211_get_range(void * priv)1799 static int wpa_driver_nl80211_get_range(void *priv)
1800 {
1801 struct wpa_driver_nl80211_data *drv = priv;
1802 struct iw_range *range;
1803 struct iwreq iwr;
1804 int minlen;
1805 size_t buflen;
1806
1807 /*
1808 * Use larger buffer than struct iw_range in order to allow the
1809 * structure to grow in the future.
1810 */
1811 buflen = sizeof(struct iw_range) + 500;
1812 range = os_zalloc(buflen);
1813 if (range == NULL)
1814 return -1;
1815
1816 os_memset(&iwr, 0, sizeof(iwr));
1817 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1818 iwr.u.data.pointer = (caddr_t) range;
1819 iwr.u.data.length = buflen;
1820
1821 minlen = ((char *) &range->enc_capa) - (char *) range +
1822 sizeof(range->enc_capa);
1823
1824 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1825 perror("ioctl[SIOCGIWRANGE]");
1826 os_free(range);
1827 return -1;
1828 } else if (iwr.u.data.length >= minlen &&
1829 range->we_version_compiled >= 18) {
1830 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1831 "WE(source)=%d enc_capa=0x%x",
1832 range->we_version_compiled,
1833 range->we_version_source,
1834 range->enc_capa);
1835 drv->has_capability = 1;
1836 drv->we_version_compiled = range->we_version_compiled;
1837 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1838 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1839 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1840 }
1841 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1842 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1843 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1844 }
1845 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1846 WPA_DRIVER_CAPA_ENC_WEP104;
1847 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1848 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1849 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1850 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1851 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1852 WPA_DRIVER_AUTH_SHARED |
1853 WPA_DRIVER_AUTH_LEAP;
1854 wpa_printf(MSG_DEBUG, " capabilities: key_mgmt 0x%x enc 0x%x",
1855 drv->capa.key_mgmt, drv->capa.enc);
1856 } else {
1857 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1858 "assuming WPA is not supported");
1859 }
1860
1861 os_free(range);
1862 return 0;
1863 }
1864
1865
wpa_driver_nl80211_set_wpa(void * priv,int enabled)1866 static int wpa_driver_nl80211_set_wpa(void *priv, int enabled)
1867 {
1868 struct wpa_driver_nl80211_data *drv = priv;
1869 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1870
1871 return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_WPA_ENABLED,
1872 enabled);
1873 }
1874
1875
wpa_driver_nl80211_set_key(void * priv,wpa_alg alg,const u8 * addr,int key_idx,int set_tx,const u8 * seq,size_t seq_len,const u8 * key,size_t key_len)1876 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1877 const u8 *addr, int key_idx,
1878 int set_tx, const u8 *seq,
1879 size_t seq_len,
1880 const u8 *key, size_t key_len)
1881 {
1882 struct wpa_driver_nl80211_data *drv = priv;
1883 int err;
1884 struct nl_msg *msg;
1885
1886 wpa_printf(MSG_DEBUG, "%s: alg=%d addr=%p key_idx=%d set_tx=%d "
1887 "seq_len=%lu key_len=%lu",
1888 __func__, alg, addr, key_idx, set_tx,
1889 (unsigned long) seq_len, (unsigned long) key_len);
1890
1891 msg = nlmsg_alloc();
1892 if (msg == NULL)
1893 return -1;
1894
1895 if (alg == WPA_ALG_NONE) {
1896 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1897 NL80211_CMD_DEL_KEY, 0);
1898 } else {
1899 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1900 NL80211_CMD_NEW_KEY, 0);
1901 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1902 switch (alg) {
1903 case WPA_ALG_WEP:
1904 if (key_len == 5)
1905 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1906 0x000FAC01);
1907 else
1908 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1909 0x000FAC05);
1910 break;
1911 case WPA_ALG_TKIP:
1912 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1913 break;
1914 case WPA_ALG_CCMP:
1915 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1916 break;
1917 #ifdef CONFIG_IEEE80211W
1918 case WPA_ALG_IGTK:
1919 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1920 break;
1921 #endif /* CONFIG_IEEE80211W */
1922 default:
1923 nlmsg_free(msg);
1924 return -1;
1925 }
1926 }
1927
1928 if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1929 {
1930 wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
1931 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1932 }
1933 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1934 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1935
1936 err = send_and_recv_msgs(drv, msg, NULL, NULL);
1937 if (err) {
1938 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d", err);
1939 return -1;
1940 }
1941
1942 if (set_tx && alg != WPA_ALG_NONE) {
1943 msg = nlmsg_alloc();
1944 if (msg == NULL)
1945 return -1;
1946
1947 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1948 0, NL80211_CMD_SET_KEY, 0);
1949 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1950 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1951 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1952
1953 err = send_and_recv_msgs(drv, msg, NULL, NULL);
1954 if (err) {
1955 wpa_printf(MSG_DEBUG, "nl80211: set default key "
1956 "failed; err=%d", err);
1957 return -1;
1958 }
1959 }
1960
1961 return 0;
1962
1963 nla_put_failure:
1964 return -ENOBUFS;
1965 }
1966
1967
wpa_driver_nl80211_set_countermeasures(void * priv,int enabled)1968 static int wpa_driver_nl80211_set_countermeasures(void *priv,
1969 int enabled)
1970 {
1971 struct wpa_driver_nl80211_data *drv = priv;
1972 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1973 return wpa_driver_nl80211_set_auth_param(drv,
1974 IW_AUTH_TKIP_COUNTERMEASURES,
1975 enabled);
1976 }
1977
1978
wpa_driver_nl80211_set_drop_unencrypted(void * priv,int enabled)1979 static int wpa_driver_nl80211_set_drop_unencrypted(void *priv,
1980 int enabled)
1981 {
1982 struct wpa_driver_nl80211_data *drv = priv;
1983 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1984 drv->use_crypt = enabled;
1985 return wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1986 enabled);
1987 }
1988
1989
wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data * drv,const u8 * addr,int cmd,int reason_code)1990 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1991 const u8 *addr, int cmd, int reason_code)
1992 {
1993 struct iwreq iwr;
1994 struct iw_mlme mlme;
1995 int ret = 0;
1996
1997 os_memset(&iwr, 0, sizeof(iwr));
1998 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1999 os_memset(&mlme, 0, sizeof(mlme));
2000 mlme.cmd = cmd;
2001 mlme.reason_code = reason_code;
2002 mlme.addr.sa_family = ARPHRD_ETHER;
2003 os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
2004 iwr.u.data.pointer = (caddr_t) &mlme;
2005 iwr.u.data.length = sizeof(mlme);
2006
2007 if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
2008 perror("ioctl[SIOCSIWMLME]");
2009 ret = -1;
2010 }
2011
2012 return ret;
2013 }
2014
2015
wpa_driver_nl80211_deauthenticate(void * priv,const u8 * addr,int reason_code)2016 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2017 int reason_code)
2018 {
2019 struct wpa_driver_nl80211_data *drv = priv;
2020 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2021 return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
2022 }
2023
2024
wpa_driver_nl80211_disassociate(void * priv,const u8 * addr,int reason_code)2025 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2026 int reason_code)
2027 {
2028 struct wpa_driver_nl80211_data *drv = priv;
2029 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2030 return wpa_driver_nl80211_mlme(drv, addr, IW_MLME_DISASSOC,
2031 reason_code);
2032 }
2033
2034
wpa_driver_nl80211_set_gen_ie(void * priv,const u8 * ie,size_t ie_len)2035 static int wpa_driver_nl80211_set_gen_ie(void *priv, const u8 *ie,
2036 size_t ie_len)
2037 {
2038 struct wpa_driver_nl80211_data *drv = priv;
2039 struct iwreq iwr;
2040 int ret = 0;
2041
2042 os_memset(&iwr, 0, sizeof(iwr));
2043 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2044 iwr.u.data.pointer = (caddr_t) ie;
2045 iwr.u.data.length = ie_len;
2046
2047 if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2048 perror("ioctl[SIOCSIWGENIE]");
2049 ret = -1;
2050 }
2051
2052 return ret;
2053 }
2054
2055
wpa_driver_nl80211_cipher2wext(int cipher)2056 static int wpa_driver_nl80211_cipher2wext(int cipher)
2057 {
2058 switch (cipher) {
2059 case CIPHER_NONE:
2060 return IW_AUTH_CIPHER_NONE;
2061 case CIPHER_WEP40:
2062 return IW_AUTH_CIPHER_WEP40;
2063 case CIPHER_TKIP:
2064 return IW_AUTH_CIPHER_TKIP;
2065 case CIPHER_CCMP:
2066 return IW_AUTH_CIPHER_CCMP;
2067 case CIPHER_WEP104:
2068 return IW_AUTH_CIPHER_WEP104;
2069 default:
2070 return 0;
2071 }
2072 }
2073
2074
wpa_driver_nl80211_keymgmt2wext(int keymgmt)2075 static int wpa_driver_nl80211_keymgmt2wext(int keymgmt)
2076 {
2077 switch (keymgmt) {
2078 case KEY_MGMT_802_1X:
2079 case KEY_MGMT_802_1X_NO_WPA:
2080 return IW_AUTH_KEY_MGMT_802_1X;
2081 case KEY_MGMT_PSK:
2082 return IW_AUTH_KEY_MGMT_PSK;
2083 default:
2084 return 0;
2085 }
2086 }
2087
2088
2089 static int
wpa_driver_nl80211_auth_alg_fallback(struct wpa_driver_nl80211_data * drv,struct wpa_driver_associate_params * params)2090 wpa_driver_nl80211_auth_alg_fallback(struct wpa_driver_nl80211_data *drv,
2091 struct wpa_driver_associate_params *params)
2092 {
2093 struct iwreq iwr;
2094 int ret = 0;
2095
2096 wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2097 "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2098
2099 os_memset(&iwr, 0, sizeof(iwr));
2100 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2101 /* Just changing mode, not actual keys */
2102 iwr.u.encoding.flags = 0;
2103 iwr.u.encoding.pointer = (caddr_t) NULL;
2104 iwr.u.encoding.length = 0;
2105
2106 /*
2107 * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2108 * different things. Here they are used to indicate Open System vs.
2109 * Shared Key authentication algorithm. However, some drivers may use
2110 * them to select between open/restricted WEP encrypted (open = allow
2111 * both unencrypted and encrypted frames; restricted = only allow
2112 * encrypted frames).
2113 */
2114
2115 if (!drv->use_crypt) {
2116 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2117 } else {
2118 if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2119 iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2120 if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2121 iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2122 }
2123
2124 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2125 perror("ioctl[SIOCSIWENCODE]");
2126 ret = -1;
2127 }
2128
2129 return ret;
2130 }
2131
2132
wpa_driver_nl80211_associate(void * priv,struct wpa_driver_associate_params * params)2133 static int wpa_driver_nl80211_associate(
2134 void *priv, struct wpa_driver_associate_params *params)
2135 {
2136 struct wpa_driver_nl80211_data *drv = priv;
2137 int ret = 0;
2138 int allow_unencrypted_eapol;
2139 int value;
2140
2141 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2142
2143 /*
2144 * If the driver did not support SIOCSIWAUTH, fallback to
2145 * SIOCSIWENCODE here.
2146 */
2147 if (drv->auth_alg_fallback &&
2148 wpa_driver_nl80211_auth_alg_fallback(drv, params) < 0)
2149 ret = -1;
2150
2151 if (!params->bssid &&
2152 wpa_driver_nl80211_set_bssid(drv, NULL) < 0)
2153 ret = -1;
2154
2155 /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2156 * from configuration, not from here, where only the selected suite is
2157 * available */
2158 if (wpa_driver_nl80211_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2159 < 0)
2160 ret = -1;
2161 if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2162 value = IW_AUTH_WPA_VERSION_DISABLED;
2163 else if (params->wpa_ie[0] == WLAN_EID_RSN)
2164 value = IW_AUTH_WPA_VERSION_WPA2;
2165 else
2166 value = IW_AUTH_WPA_VERSION_WPA;
2167 if (wpa_driver_nl80211_set_auth_param(drv,
2168 IW_AUTH_WPA_VERSION, value) < 0)
2169 ret = -1;
2170 value = wpa_driver_nl80211_cipher2wext(params->pairwise_suite);
2171 if (wpa_driver_nl80211_set_auth_param(drv,
2172 IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2173 ret = -1;
2174 value = wpa_driver_nl80211_cipher2wext(params->group_suite);
2175 if (wpa_driver_nl80211_set_auth_param(drv,
2176 IW_AUTH_CIPHER_GROUP, value) < 0)
2177 ret = -1;
2178 value = wpa_driver_nl80211_keymgmt2wext(params->key_mgmt_suite);
2179 if (wpa_driver_nl80211_set_auth_param(drv,
2180 IW_AUTH_KEY_MGMT, value) < 0)
2181 ret = -1;
2182 value = params->key_mgmt_suite != KEY_MGMT_NONE ||
2183 params->pairwise_suite != CIPHER_NONE ||
2184 params->group_suite != CIPHER_NONE ||
2185 params->wpa_ie_len;
2186 if (wpa_driver_nl80211_set_auth_param(drv,
2187 IW_AUTH_PRIVACY_INVOKED, value) < 0)
2188 ret = -1;
2189
2190 /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2191 * not using WPA. IEEE 802.1X specifies that these frames are not
2192 * encrypted, but WPA encrypts them when pairwise keys are in use. */
2193 if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
2194 params->key_mgmt_suite == KEY_MGMT_PSK)
2195 allow_unencrypted_eapol = 0;
2196 else
2197 allow_unencrypted_eapol = 1;
2198
2199 if (wpa_driver_nl80211_set_auth_param(drv,
2200 IW_AUTH_RX_UNENCRYPTED_EAPOL,
2201 allow_unencrypted_eapol) < 0)
2202 ret = -1;
2203 if (params->freq && wpa_driver_nl80211_set_freq(drv, params->freq) < 0)
2204 ret = -1;
2205 if (wpa_driver_nl80211_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2206 ret = -1;
2207 if (params->bssid &&
2208 wpa_driver_nl80211_set_bssid(drv, params->bssid) < 0)
2209 ret = -1;
2210
2211 return ret;
2212 }
2213
2214
wpa_driver_nl80211_set_auth_alg(void * priv,int auth_alg)2215 static int wpa_driver_nl80211_set_auth_alg(void *priv, int auth_alg)
2216 {
2217 struct wpa_driver_nl80211_data *drv = priv;
2218 int algs = 0, res;
2219
2220 if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
2221 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2222 if (auth_alg & AUTH_ALG_SHARED_KEY)
2223 algs |= IW_AUTH_ALG_SHARED_KEY;
2224 if (auth_alg & AUTH_ALG_LEAP)
2225 algs |= IW_AUTH_ALG_LEAP;
2226 if (algs == 0) {
2227 /* at least one algorithm should be set */
2228 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2229 }
2230
2231 res = wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2232 algs);
2233 drv->auth_alg_fallback = res == -2;
2234 return res;
2235 }
2236
2237
2238 /**
2239 * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2240 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
2241 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2242 * Returns: 0 on success, -1 on failure
2243 */
wpa_driver_nl80211_set_mode(void * priv,int mode)2244 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
2245 {
2246 struct wpa_driver_nl80211_data *drv = priv;
2247 int ret = -1, flags;
2248 struct nl_msg *msg;
2249
2250 msg = nlmsg_alloc();
2251 if (!msg)
2252 return -1;
2253
2254 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2255 0, NL80211_CMD_SET_INTERFACE, 0);
2256 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2257 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2258 mode ? NL80211_IFTYPE_ADHOC : NL80211_IFTYPE_STATION);
2259
2260 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2261 if (!ret)
2262 return 0;
2263 else
2264 goto try_again;
2265
2266 nla_put_failure:
2267 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)",
2268 ret, strerror(-ret));
2269 return -1;
2270
2271 try_again:
2272 /* mac80211 doesn't allow mode changes while the device is up, so
2273 * take the device down, try to set the mode again, and bring the
2274 * device back up.
2275 */
2276 if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) {
2277 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
2278
2279 /* Try to set the mode again while the interface is down */
2280 msg = nlmsg_alloc();
2281 if (!msg)
2282 return -1;
2283
2284 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2285 0, NL80211_CMD_SET_INTERFACE, 0);
2286 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2287 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE,
2288 mode ? NL80211_IFTYPE_ADHOC :
2289 NL80211_IFTYPE_STATION);
2290 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2291 if (ret) {
2292 wpa_printf(MSG_ERROR, "Failed to set interface %s "
2293 "mode(try_again): %d (%s)",
2294 drv->ifname, ret, strerror(-ret));
2295 }
2296
2297 /* Ignore return value of get_ifflags to ensure that the device
2298 * is always up like it was before this function was called.
2299 */
2300 (void) wpa_driver_nl80211_get_ifflags(drv, &flags);
2301 (void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP);
2302 }
2303
2304 return ret;
2305 }
2306
2307
wpa_driver_nl80211_pmksa(struct wpa_driver_nl80211_data * drv,u32 cmd,const u8 * bssid,const u8 * pmkid)2308 static int wpa_driver_nl80211_pmksa(struct wpa_driver_nl80211_data *drv,
2309 u32 cmd, const u8 *bssid, const u8 *pmkid)
2310 {
2311 struct iwreq iwr;
2312 struct iw_pmksa pmksa;
2313 int ret = 0;
2314
2315 os_memset(&iwr, 0, sizeof(iwr));
2316 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2317 os_memset(&pmksa, 0, sizeof(pmksa));
2318 pmksa.cmd = cmd;
2319 pmksa.bssid.sa_family = ARPHRD_ETHER;
2320 if (bssid)
2321 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2322 if (pmkid)
2323 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2324 iwr.u.data.pointer = (caddr_t) &pmksa;
2325 iwr.u.data.length = sizeof(pmksa);
2326
2327 if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2328 if (errno != EOPNOTSUPP)
2329 perror("ioctl[SIOCSIWPMKSA]");
2330 ret = -1;
2331 }
2332
2333 return ret;
2334 }
2335
2336
wpa_driver_nl80211_add_pmkid(void * priv,const u8 * bssid,const u8 * pmkid)2337 static int wpa_driver_nl80211_add_pmkid(void *priv, const u8 *bssid,
2338 const u8 *pmkid)
2339 {
2340 struct wpa_driver_nl80211_data *drv = priv;
2341 return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2342 }
2343
2344
wpa_driver_nl80211_remove_pmkid(void * priv,const u8 * bssid,const u8 * pmkid)2345 static int wpa_driver_nl80211_remove_pmkid(void *priv, const u8 *bssid,
2346 const u8 *pmkid)
2347 {
2348 struct wpa_driver_nl80211_data *drv = priv;
2349 return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2350 }
2351
2352
wpa_driver_nl80211_flush_pmkid(void * priv)2353 static int wpa_driver_nl80211_flush_pmkid(void *priv)
2354 {
2355 struct wpa_driver_nl80211_data *drv = priv;
2356 return wpa_driver_nl80211_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2357 }
2358
2359
wpa_driver_nl80211_get_capa(void * priv,struct wpa_driver_capa * capa)2360 static int wpa_driver_nl80211_get_capa(void *priv,
2361 struct wpa_driver_capa *capa)
2362 {
2363 struct wpa_driver_nl80211_data *drv = priv;
2364 if (!drv->has_capability)
2365 return -1;
2366 os_memcpy(capa, &drv->capa, sizeof(*capa));
2367 return 0;
2368 }
2369
2370
wpa_driver_nl80211_set_operstate(void * priv,int state)2371 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2372 {
2373 struct wpa_driver_nl80211_data *drv = priv;
2374
2375 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2376 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2377 drv->operstate = state;
2378 return wpa_driver_nl80211_send_oper_ifla(
2379 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2380 }
2381
2382
2383 #ifdef CONFIG_CLIENT_MLME
wpa_driver_nl80211_open_mlme(struct wpa_driver_nl80211_data * drv)2384 static int wpa_driver_nl80211_open_mlme(struct wpa_driver_nl80211_data *drv)
2385 {
2386 if (wpa_driver_nl80211_set_userspace_mlme(drv, 1) < 0) {
2387 wpa_printf(MSG_ERROR, "nl80211: Failed to enable userspace "
2388 "MLME");
2389 return -1;
2390 }
2391 if (wpa_driver_nl80211_create_monitor_interface(drv)) {
2392 wpa_printf(MSG_ERROR, "nl80211: Failed to create monitor "
2393 "interface");
2394 return -1;
2395 }
2396 return 0;
2397 }
2398 #endif /* CONFIG_CLIENT_MLME */
2399
2400
wpa_driver_nl80211_set_param(void * priv,const char * param)2401 static int wpa_driver_nl80211_set_param(void *priv, const char *param)
2402 {
2403 #ifdef CONFIG_CLIENT_MLME
2404 struct wpa_driver_nl80211_data *drv = priv;
2405
2406 if (param == NULL)
2407 return 0;
2408
2409 wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param);
2410
2411 if (os_strstr(param, "use_mlme=1")) {
2412 wpa_printf(MSG_DEBUG, "nl80211: Using user space MLME");
2413 drv->capa.flags |= WPA_DRIVER_FLAGS_USER_SPACE_MLME;
2414
2415 if (wpa_driver_nl80211_open_mlme(drv))
2416 return -1;
2417 }
2418 #endif /* CONFIG_CLIENT_MLME */
2419
2420 return 0;
2421 }
2422
2423
2424 #ifdef CONFIG_CLIENT_MLME
2425
2426 struct phy_info_arg {
2427 u16 *num_modes;
2428 struct wpa_hw_modes *modes;
2429 };
2430
2431
phy_info_handler(struct nl_msg * msg,void * arg)2432 static int phy_info_handler(struct nl_msg *msg, void *arg)
2433 {
2434 struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2435 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2436 struct phy_info_arg *phy_info = arg;
2437
2438 struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2439
2440 struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2441 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1]
2442 = {
2443 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2444 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2445 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2446 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2447 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2448 };
2449
2450 struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2451 static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2452 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2453 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] =
2454 { .type = NLA_FLAG },
2455 };
2456
2457 struct nlattr *nl_band;
2458 struct nlattr *nl_freq;
2459 struct nlattr *nl_rate;
2460 int rem_band, rem_freq, rem_rate;
2461 struct wpa_hw_modes *mode;
2462 int idx, mode_is_set;
2463
2464 nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2465 genlmsg_attrlen(gnlh, 0), NULL);
2466
2467 if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2468 return NL_SKIP;
2469
2470 nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS],
2471 rem_band) {
2472 mode = os_realloc(phy_info->modes,
2473 (*phy_info->num_modes + 1) * sizeof(*mode));
2474 if (!mode)
2475 return NL_SKIP;
2476 phy_info->modes = mode;
2477
2478 mode_is_set = 0;
2479
2480 mode = &phy_info->modes[*(phy_info->num_modes)];
2481 os_memset(mode, 0, sizeof(*mode));
2482 *(phy_info->num_modes) += 1;
2483
2484 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2485 nla_len(nl_band), NULL);
2486
2487 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS],
2488 rem_freq) {
2489 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX,
2490 nla_data(nl_freq), nla_len(nl_freq),
2491 freq_policy);
2492 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2493 continue;
2494 mode->num_channels++;
2495 }
2496
2497 mode->channels = os_zalloc(mode->num_channels *
2498 sizeof(struct wpa_channel_data));
2499 if (!mode->channels)
2500 return NL_SKIP;
2501
2502 idx = 0;
2503
2504 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS],
2505 rem_freq) {
2506 nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX,
2507 nla_data(nl_freq), nla_len(nl_freq),
2508 freq_policy);
2509 if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2510 continue;
2511
2512 mode->channels[idx].freq = nla_get_u32(
2513 tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2514 mode->channels[idx].flag |= WPA_CHAN_W_SCAN |
2515 WPA_CHAN_W_ACTIVE_SCAN |
2516 WPA_CHAN_W_IBSS;
2517
2518 if (!mode_is_set) {
2519 /* crude heuristic */
2520 if (mode->channels[idx].freq < 4000)
2521 mode->mode = WPA_MODE_IEEE80211B;
2522 else
2523 mode->mode = WPA_MODE_IEEE80211A;
2524 mode_is_set = 1;
2525 }
2526
2527 /* crude heuristic */
2528 if (mode->channels[idx].freq < 4000) {
2529 if (mode->channels[idx].freq == 2484)
2530 mode->channels[idx].chan = 14;
2531 else
2532 mode->channels[idx].chan =
2533 (mode->channels[idx].freq -
2534 2407) / 5;
2535 } else
2536 mode->channels[idx].chan =
2537 mode->channels[idx].freq / 5 - 1000;
2538
2539 if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2540 mode->channels[idx].flag &= ~WPA_CHAN_W_SCAN;
2541 if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2542 mode->channels[idx].flag &=
2543 ~WPA_CHAN_W_ACTIVE_SCAN;
2544 if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2545 mode->channels[idx].flag &= ~WPA_CHAN_W_IBSS;
2546 idx++;
2547 }
2548
2549 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES],
2550 rem_rate) {
2551 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX,
2552 nla_data(nl_rate), nla_len(nl_rate),
2553 rate_policy);
2554 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2555 continue;
2556 mode->num_rates++;
2557 }
2558
2559 mode->rates = os_zalloc(mode->num_rates *
2560 sizeof(struct wpa_rate_data));
2561 if (!mode->rates)
2562 return NL_SKIP;
2563
2564 idx = 0;
2565
2566 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES],
2567 rem_rate) {
2568 nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX,
2569 nla_data(nl_rate), nla_len(nl_rate),
2570 rate_policy);
2571 if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2572 continue;
2573 mode->rates[idx].rate = nla_get_u32(
2574 tb_rate[NL80211_BITRATE_ATTR_RATE]);
2575
2576 /* crude heuristic */
2577 if (mode->mode == WPA_MODE_IEEE80211B &&
2578 mode->rates[idx].rate > 200)
2579 mode->mode = WPA_MODE_IEEE80211G;
2580
2581 if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2582 mode->rates[idx].flags |= WPA_RATE_PREAMBLE2;
2583
2584 idx++;
2585 }
2586 }
2587
2588 return NL_SKIP;
2589 }
2590
2591
2592 static struct wpa_hw_modes *
wpa_driver_nl80211_get_hw_feature_data(void * priv,u16 * num_modes,u16 * flags)2593 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2594 {
2595 struct wpa_driver_nl80211_data *drv = priv;
2596 struct nl_msg *msg;
2597 struct phy_info_arg result = {
2598 .num_modes = num_modes,
2599 .modes = NULL,
2600 };
2601
2602 *num_modes = 0;
2603 *flags = 0;
2604
2605 msg = nlmsg_alloc();
2606 if (!msg)
2607 return NULL;
2608
2609 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2610 0, NL80211_CMD_GET_WIPHY, 0);
2611
2612 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2613
2614 if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2615 return result.modes;
2616 nla_put_failure:
2617 return NULL;
2618 }
2619
2620
wpa_driver_nl80211_set_channel(void * priv,wpa_hw_mode phymode,int chan,int freq)2621 static int wpa_driver_nl80211_set_channel(void *priv, wpa_hw_mode phymode,
2622 int chan, int freq)
2623 {
2624 return wpa_driver_nl80211_set_freq(priv, freq);
2625 }
2626
2627
wpa_driver_nl80211_send_mlme(void * priv,const u8 * data,size_t data_len)2628 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2629 size_t data_len)
2630 {
2631 struct wpa_driver_nl80211_data *drv = priv;
2632 __u8 rtap_hdr[] = {
2633 0x00, 0x00, /* radiotap version */
2634 0x0e, 0x00, /* radiotap length */
2635 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2636 0x0c, /* F_WEP | F_FRAG (encrypt/fragment if required) */
2637 0x00, /* padding */
2638 0x00, 0x00, /* RX and TX flags to indicate that */
2639 0x00, 0x00, /* this is the injected frame directly */
2640 };
2641 struct iovec iov[2] = {
2642 {
2643 .iov_base = &rtap_hdr,
2644 .iov_len = sizeof(rtap_hdr),
2645 },
2646 {
2647 .iov_base = (void *) data,
2648 .iov_len = data_len,
2649 }
2650 };
2651 struct msghdr msg = {
2652 .msg_name = NULL,
2653 .msg_namelen = 0,
2654 .msg_iov = iov,
2655 .msg_iovlen = 2,
2656 .msg_control = NULL,
2657 .msg_controllen = 0,
2658 .msg_flags = 0,
2659 };
2660
2661 if (sendmsg(drv->monitor_sock, &msg, 0) < 0) {
2662 perror("send[MLME]");
2663 return -1;
2664 }
2665
2666 return 0;
2667 }
2668
2669
wpa_driver_nl80211_mlme_add_sta(void * priv,const u8 * addr,const u8 * supp_rates,size_t supp_rates_len)2670 static int wpa_driver_nl80211_mlme_add_sta(void *priv, const u8 *addr,
2671 const u8 *supp_rates,
2672 size_t supp_rates_len)
2673 {
2674 struct wpa_driver_nl80211_data *drv = priv;
2675 struct nl_msg *msg;
2676 int ret = -1;
2677
2678 msg = nlmsg_alloc();
2679 if (!msg)
2680 return -ENOMEM;
2681
2682 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2683 0, NL80211_CMD_NEW_STATION, 0);
2684
2685 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2686 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2687 /* TODO: Get proper Association ID and listen interval */
2688 NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, 1);
2689 NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, supp_rates_len,
2690 supp_rates);
2691 NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL, 1);
2692
2693 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2694 /* ignore EEXIST, this happens if a STA associates while associated */
2695 if (ret == -EEXIST || ret >= 0)
2696 ret = 0;
2697
2698 nla_put_failure:
2699 return ret;
2700 }
2701
2702
wpa_driver_nl80211_mlme_remove_sta(void * priv,const u8 * addr)2703 static int wpa_driver_nl80211_mlme_remove_sta(void *priv, const u8 *addr)
2704 {
2705 struct wpa_driver_nl80211_data *drv = priv;
2706 struct nl_msg *msg;
2707 int ret = -1;
2708
2709 msg = nlmsg_alloc();
2710 if (!msg)
2711 return -ENOMEM;
2712
2713 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2714 0, NL80211_CMD_DEL_STATION, 0);
2715
2716 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2717 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2718
2719 ret = 0;
2720
2721 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2722 return ret;
2723
2724 nla_put_failure:
2725 return -ENOBUFS;
2726 }
2727
2728 #endif /* CONFIG_CLIENT_MLME */
2729
2730
2731 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2732 .name = "nl80211",
2733 .desc = "Linux nl80211/cfg80211",
2734 .get_bssid = wpa_driver_nl80211_get_bssid,
2735 .get_ssid = wpa_driver_nl80211_get_ssid,
2736 .set_wpa = wpa_driver_nl80211_set_wpa,
2737 .set_key = wpa_driver_nl80211_set_key,
2738 .set_countermeasures = wpa_driver_nl80211_set_countermeasures,
2739 .set_drop_unencrypted = wpa_driver_nl80211_set_drop_unencrypted,
2740 .scan = wpa_driver_nl80211_scan,
2741 .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
2742 .deauthenticate = wpa_driver_nl80211_deauthenticate,
2743 .disassociate = wpa_driver_nl80211_disassociate,
2744 .set_mode = wpa_driver_nl80211_set_mode,
2745 .associate = wpa_driver_nl80211_associate,
2746 .set_auth_alg = wpa_driver_nl80211_set_auth_alg,
2747 .init = wpa_driver_nl80211_init,
2748 .deinit = wpa_driver_nl80211_deinit,
2749 .set_param = wpa_driver_nl80211_set_param,
2750 .add_pmkid = wpa_driver_nl80211_add_pmkid,
2751 .remove_pmkid = wpa_driver_nl80211_remove_pmkid,
2752 .flush_pmkid = wpa_driver_nl80211_flush_pmkid,
2753 .get_capa = wpa_driver_nl80211_get_capa,
2754 .set_operstate = wpa_driver_nl80211_set_operstate,
2755 .set_country = wpa_driver_nl80211_set_country,
2756 .set_probe_req_ie = wpa_driver_nl80211_set_probe_req_ie,
2757 #ifdef CONFIG_CLIENT_MLME
2758 .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
2759 .set_channel = wpa_driver_nl80211_set_channel,
2760 .set_ssid = wpa_driver_nl80211_set_ssid,
2761 .set_bssid = wpa_driver_nl80211_set_bssid,
2762 .send_mlme = wpa_driver_nl80211_send_mlme,
2763 .mlme_add_sta = wpa_driver_nl80211_mlme_add_sta,
2764 .mlme_remove_sta = wpa_driver_nl80211_mlme_remove_sta,
2765 #endif /* CONFIG_CLIENT_MLME */
2766 };
2767