1 /*
2 * Driver interaction with generic Linux Wireless Extensions
3 * Copyright (c) 2003-2015, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 *
8 * This file implements a driver interface for the Linux Wireless Extensions.
9 * When used with WE-18 or newer, this interface can be used as-is with number
10 * of drivers. In addition to this, some of the common functions in this file
11 * can be used by other driver interface implementations that use generic WE
12 * ioctls, but require private ioctls for some of the functionality.
13 */
14
15 #include "includes.h"
16 #include <sys/ioctl.h>
17 #include <sys/types.h>
18 #include <sys/stat.h>
19 #include <fcntl.h>
20 #include <net/if_arp.h>
21 #include <dirent.h>
22
23 #include "linux_wext.h"
24 #include "common.h"
25 #include "eloop.h"
26 #include "common/ieee802_11_defs.h"
27 #include "common/wpa_common.h"
28 #include "priv_netlink.h"
29 #include "netlink.h"
30 #include "linux_ioctl.h"
31 #include "rfkill.h"
32 #include "driver.h"
33 #include "driver_wext.h"
34
35 static int wpa_driver_wext_flush_pmkid(void *priv);
36 static int wpa_driver_wext_get_range(void *priv);
37 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv);
38 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv);
39 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg);
40
41
wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data * drv,int idx,u32 value)42 int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
43 int idx, u32 value)
44 {
45 struct iwreq iwr;
46 int ret = 0;
47
48 os_memset(&iwr, 0, sizeof(iwr));
49 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
50 iwr.u.param.flags = idx & IW_AUTH_INDEX;
51 iwr.u.param.value = value;
52
53 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
54 if (errno != EOPNOTSUPP) {
55 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
56 "value 0x%x) failed: %s)",
57 idx, value, strerror(errno));
58 }
59 ret = errno == EOPNOTSUPP ? -2 : -1;
60 }
61
62 return ret;
63 }
64
65
66 /**
67 * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
68 * @priv: Pointer to private wext data from wpa_driver_wext_init()
69 * @bssid: Buffer for BSSID
70 * Returns: 0 on success, -1 on failure
71 */
wpa_driver_wext_get_bssid(void * priv,u8 * bssid)72 int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
73 {
74 struct wpa_driver_wext_data *drv = priv;
75 struct iwreq iwr;
76 int ret = 0;
77
78 os_memset(&iwr, 0, sizeof(iwr));
79 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
80
81 if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
82 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWAP]: %s", strerror(errno));
83 ret = -1;
84 }
85 os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
86
87 return ret;
88 }
89
90
91 /**
92 * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
93 * @priv: Pointer to private wext data from wpa_driver_wext_init()
94 * @bssid: BSSID
95 * Returns: 0 on success, -1 on failure
96 */
wpa_driver_wext_set_bssid(void * priv,const u8 * bssid)97 int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
98 {
99 struct wpa_driver_wext_data *drv = priv;
100 struct iwreq iwr;
101 int ret = 0;
102
103 os_memset(&iwr, 0, sizeof(iwr));
104 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
105 iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
106 if (bssid)
107 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
108 else
109 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
110
111 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
112 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWAP]: %s", strerror(errno));
113 ret = -1;
114 }
115
116 return ret;
117 }
118
119
120 /**
121 * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
122 * @priv: Pointer to private wext data from wpa_driver_wext_init()
123 * @ssid: Buffer for the SSID; must be at least 32 bytes long
124 * Returns: SSID length on success, -1 on failure
125 */
wpa_driver_wext_get_ssid(void * priv,u8 * ssid)126 int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
127 {
128 struct wpa_driver_wext_data *drv = priv;
129 struct iwreq iwr;
130 int ret = 0;
131
132 os_memset(&iwr, 0, sizeof(iwr));
133 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
134 iwr.u.essid.pointer = (caddr_t) ssid;
135 iwr.u.essid.length = SSID_MAX_LEN;
136
137 if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
138 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWESSID]: %s",
139 strerror(errno));
140 ret = -1;
141 } else {
142 ret = iwr.u.essid.length;
143 if (ret > SSID_MAX_LEN)
144 ret = SSID_MAX_LEN;
145 /* Some drivers include nul termination in the SSID, so let's
146 * remove it here before further processing. WE-21 changes this
147 * to explicitly require the length _not_ to include nul
148 * termination. */
149 if (ret > 0 && ssid[ret - 1] == '\0' &&
150 drv->we_version_compiled < 21)
151 ret--;
152 }
153
154 return ret;
155 }
156
157
158 /**
159 * wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
160 * @priv: Pointer to private wext data from wpa_driver_wext_init()
161 * @ssid: SSID
162 * @ssid_len: Length of SSID (0..32)
163 * Returns: 0 on success, -1 on failure
164 */
wpa_driver_wext_set_ssid(void * priv,const u8 * ssid,size_t ssid_len)165 int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
166 {
167 struct wpa_driver_wext_data *drv = priv;
168 struct iwreq iwr;
169 int ret = 0;
170 char buf[33];
171
172 if (ssid_len > SSID_MAX_LEN)
173 return -1;
174
175 os_memset(&iwr, 0, sizeof(iwr));
176 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
177 /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
178 iwr.u.essid.flags = (ssid_len != 0);
179 os_memset(buf, 0, sizeof(buf));
180 os_memcpy(buf, ssid, ssid_len);
181 iwr.u.essid.pointer = (caddr_t) buf;
182 if (drv->we_version_compiled < 21) {
183 /* For historic reasons, set SSID length to include one extra
184 * character, C string nul termination, even though SSID is
185 * really an octet string that should not be presented as a C
186 * string. Some Linux drivers decrement the length by one and
187 * can thus end up missing the last octet of the SSID if the
188 * length is not incremented here. WE-21 changes this to
189 * explicitly require the length _not_ to include nul
190 * termination. */
191 if (ssid_len)
192 ssid_len++;
193 }
194 iwr.u.essid.length = ssid_len;
195
196 if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
197 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWESSID]: %s",
198 strerror(errno));
199 ret = -1;
200 }
201
202 return ret;
203 }
204
205
206 /**
207 * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
208 * @priv: Pointer to private wext data from wpa_driver_wext_init()
209 * @freq: Frequency in MHz
210 * Returns: 0 on success, -1 on failure
211 */
wpa_driver_wext_set_freq(void * priv,int freq)212 int wpa_driver_wext_set_freq(void *priv, int freq)
213 {
214 struct wpa_driver_wext_data *drv = priv;
215 struct iwreq iwr;
216 int ret = 0;
217
218 os_memset(&iwr, 0, sizeof(iwr));
219 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
220 iwr.u.freq.m = freq * 100000;
221 iwr.u.freq.e = 1;
222
223 if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
224 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWFREQ]: %s",
225 strerror(errno));
226 ret = -1;
227 }
228
229 return ret;
230 }
231
232
233 static void
wpa_driver_wext_event_wireless_custom(void * ctx,char * custom)234 wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
235 {
236 union wpa_event_data data;
237
238 wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
239 custom);
240
241 os_memset(&data, 0, sizeof(data));
242 /* Host AP driver */
243 if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
244 data.michael_mic_failure.unicast =
245 os_strstr(custom, " unicast ") != NULL;
246 /* TODO: parse parameters(?) */
247 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
248 } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
249 char *spos;
250 int bytes;
251 u8 *req_ies = NULL, *resp_ies = NULL;
252
253 spos = custom + 17;
254
255 bytes = strspn(spos, "0123456789abcdefABCDEF");
256 if (!bytes || (bytes & 1))
257 return;
258 bytes /= 2;
259
260 req_ies = os_malloc(bytes);
261 if (req_ies == NULL ||
262 hexstr2bin(spos, req_ies, bytes) < 0)
263 goto done;
264 data.assoc_info.req_ies = req_ies;
265 data.assoc_info.req_ies_len = bytes;
266
267 spos += bytes * 2;
268
269 data.assoc_info.resp_ies = NULL;
270 data.assoc_info.resp_ies_len = 0;
271
272 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
273 spos += 9;
274
275 bytes = strspn(spos, "0123456789abcdefABCDEF");
276 if (!bytes || (bytes & 1))
277 goto done;
278 bytes /= 2;
279
280 resp_ies = os_malloc(bytes);
281 if (resp_ies == NULL ||
282 hexstr2bin(spos, resp_ies, bytes) < 0)
283 goto done;
284 data.assoc_info.resp_ies = resp_ies;
285 data.assoc_info.resp_ies_len = bytes;
286 }
287
288 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
289
290 done:
291 os_free(resp_ies);
292 os_free(req_ies);
293 }
294 }
295
296
wpa_driver_wext_event_wireless_michaelmicfailure(void * ctx,const char * ev,size_t len)297 static int wpa_driver_wext_event_wireless_michaelmicfailure(
298 void *ctx, const char *ev, size_t len)
299 {
300 const struct iw_michaelmicfailure *mic;
301 union wpa_event_data data;
302
303 if (len < sizeof(*mic))
304 return -1;
305
306 mic = (const struct iw_michaelmicfailure *) ev;
307
308 wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
309 "flags=0x%x src_addr=" MACSTR, mic->flags,
310 MAC2STR(mic->src_addr.sa_data));
311
312 os_memset(&data, 0, sizeof(data));
313 data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
314 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
315
316 return 0;
317 }
318
319
wpa_driver_wext_event_wireless_pmkidcand(struct wpa_driver_wext_data * drv,const char * ev,size_t len)320 static int wpa_driver_wext_event_wireless_pmkidcand(
321 struct wpa_driver_wext_data *drv, const char *ev, size_t len)
322 {
323 const struct iw_pmkid_cand *cand;
324 union wpa_event_data data;
325 const u8 *addr;
326
327 if (len < sizeof(*cand))
328 return -1;
329
330 cand = (const struct iw_pmkid_cand *) ev;
331 addr = (const u8 *) cand->bssid.sa_data;
332
333 wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
334 "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
335 cand->index, MAC2STR(addr));
336
337 os_memset(&data, 0, sizeof(data));
338 os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
339 data.pmkid_candidate.index = cand->index;
340 data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
341 wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
342
343 return 0;
344 }
345
346
wpa_driver_wext_event_wireless_assocreqie(struct wpa_driver_wext_data * drv,const char * ev,int len)347 static int wpa_driver_wext_event_wireless_assocreqie(
348 struct wpa_driver_wext_data *drv, const char *ev, int len)
349 {
350 if (len < 0)
351 return -1;
352
353 wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
354 len);
355 os_free(drv->assoc_req_ies);
356 drv->assoc_req_ies = os_memdup(ev, len);
357 if (drv->assoc_req_ies == NULL) {
358 drv->assoc_req_ies_len = 0;
359 return -1;
360 }
361 drv->assoc_req_ies_len = len;
362
363 return 0;
364 }
365
366
wpa_driver_wext_event_wireless_assocrespie(struct wpa_driver_wext_data * drv,const char * ev,int len)367 static int wpa_driver_wext_event_wireless_assocrespie(
368 struct wpa_driver_wext_data *drv, const char *ev, int len)
369 {
370 if (len < 0)
371 return -1;
372
373 wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
374 len);
375 os_free(drv->assoc_resp_ies);
376 drv->assoc_resp_ies = os_memdup(ev, len);
377 if (drv->assoc_resp_ies == NULL) {
378 drv->assoc_resp_ies_len = 0;
379 return -1;
380 }
381 drv->assoc_resp_ies_len = len;
382
383 return 0;
384 }
385
386
wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data * drv)387 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
388 {
389 union wpa_event_data data;
390
391 if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
392 return;
393
394 os_memset(&data, 0, sizeof(data));
395 if (drv->assoc_req_ies) {
396 data.assoc_info.req_ies = drv->assoc_req_ies;
397 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
398 }
399 if (drv->assoc_resp_ies) {
400 data.assoc_info.resp_ies = drv->assoc_resp_ies;
401 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
402 }
403
404 wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
405
406 os_free(drv->assoc_req_ies);
407 drv->assoc_req_ies = NULL;
408 os_free(drv->assoc_resp_ies);
409 drv->assoc_resp_ies = NULL;
410 }
411
412
wpa_driver_wext_event_wireless(struct wpa_driver_wext_data * drv,char * data,unsigned int len)413 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
414 char *data, unsigned int len)
415 {
416 struct iw_event iwe_buf, *iwe = &iwe_buf;
417 char *pos, *end, *custom, *buf;
418
419 pos = data;
420 end = data + len;
421
422 while ((size_t) (end - pos) >= IW_EV_LCP_LEN) {
423 /* Event data may be unaligned, so make a local, aligned copy
424 * before processing. */
425 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
426 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
427 iwe->cmd, iwe->len);
428 if (iwe->len <= IW_EV_LCP_LEN || iwe->len > end - pos)
429 return;
430
431 custom = pos + IW_EV_POINT_LEN;
432 if (drv->we_version_compiled > 18 &&
433 (iwe->cmd == IWEVMICHAELMICFAILURE ||
434 iwe->cmd == IWEVCUSTOM ||
435 iwe->cmd == IWEVASSOCREQIE ||
436 iwe->cmd == IWEVASSOCRESPIE ||
437 iwe->cmd == IWEVPMKIDCAND)) {
438 /* WE-19 removed the pointer from struct iw_point */
439 char *dpos = (char *) &iwe_buf.u.data.length;
440 int dlen = dpos - (char *) &iwe_buf;
441 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
442 sizeof(struct iw_event) - dlen);
443 } else {
444 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
445 custom += IW_EV_POINT_OFF;
446 }
447
448 switch (iwe->cmd) {
449 case SIOCGIWAP:
450 wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
451 MACSTR,
452 MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
453 if (is_zero_ether_addr(
454 (const u8 *) iwe->u.ap_addr.sa_data) ||
455 ether_addr_equal((const u8 *)
456 iwe->u.ap_addr.sa_data,
457 (const u8 *)
458 "\x44\x44\x44\x44\x44\x44")) {
459 os_free(drv->assoc_req_ies);
460 drv->assoc_req_ies = NULL;
461 os_free(drv->assoc_resp_ies);
462 drv->assoc_resp_ies = NULL;
463 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC,
464 NULL);
465
466 } else {
467 wpa_driver_wext_event_assoc_ies(drv);
468 wpa_supplicant_event(drv->ctx, EVENT_ASSOC,
469 NULL);
470 }
471 break;
472 case IWEVMICHAELMICFAILURE:
473 if (iwe->u.data.length > end - custom) {
474 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
475 "IWEVMICHAELMICFAILURE length");
476 return;
477 }
478 wpa_driver_wext_event_wireless_michaelmicfailure(
479 drv->ctx, custom, iwe->u.data.length);
480 break;
481 case IWEVCUSTOM:
482 if (iwe->u.data.length > end - custom) {
483 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
484 "IWEVCUSTOM length");
485 return;
486 }
487 buf = dup_binstr(custom, iwe->u.data.length);
488 if (buf == NULL)
489 return;
490 wpa_driver_wext_event_wireless_custom(drv->ctx, buf);
491 os_free(buf);
492 break;
493 case SIOCGIWSCAN:
494 drv->scan_complete_events = 1;
495 eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
496 drv, drv->ctx);
497 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS,
498 NULL);
499 break;
500 case IWEVASSOCREQIE:
501 if (iwe->u.data.length > end - custom) {
502 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
503 "IWEVASSOCREQIE length");
504 return;
505 }
506 wpa_driver_wext_event_wireless_assocreqie(
507 drv, custom, iwe->u.data.length);
508 break;
509 case IWEVASSOCRESPIE:
510 if (iwe->u.data.length > end - custom) {
511 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
512 "IWEVASSOCRESPIE length");
513 return;
514 }
515 wpa_driver_wext_event_wireless_assocrespie(
516 drv, custom, iwe->u.data.length);
517 break;
518 case IWEVPMKIDCAND:
519 if (iwe->u.data.length > end - custom) {
520 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
521 "IWEVPMKIDCAND length");
522 return;
523 }
524 wpa_driver_wext_event_wireless_pmkidcand(
525 drv, custom, iwe->u.data.length);
526 break;
527 }
528
529 pos += iwe->len;
530 }
531 }
532
533
wpa_driver_wext_event_link(struct wpa_driver_wext_data * drv,char * buf,size_t len,int del)534 static void wpa_driver_wext_event_link(struct wpa_driver_wext_data *drv,
535 char *buf, size_t len, int del)
536 {
537 union wpa_event_data event;
538
539 os_memset(&event, 0, sizeof(event));
540 if (len > sizeof(event.interface_status.ifname))
541 len = sizeof(event.interface_status.ifname) - 1;
542 os_memcpy(event.interface_status.ifname, buf, len);
543 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
544 EVENT_INTERFACE_ADDED;
545
546 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
547 del ? "DEL" : "NEW",
548 event.interface_status.ifname,
549 del ? "removed" : "added");
550
551 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
552 if (del) {
553 if (drv->if_removed) {
554 wpa_printf(MSG_DEBUG, "WEXT: if_removed "
555 "already set - ignore event");
556 return;
557 }
558 drv->if_removed = 1;
559 } else {
560 if (if_nametoindex(drv->ifname) == 0) {
561 wpa_printf(MSG_DEBUG, "WEXT: Interface %s "
562 "does not exist - ignore "
563 "RTM_NEWLINK",
564 drv->ifname);
565 return;
566 }
567 if (!drv->if_removed) {
568 wpa_printf(MSG_DEBUG, "WEXT: if_removed "
569 "already cleared - ignore event");
570 return;
571 }
572 drv->if_removed = 0;
573 }
574 }
575
576 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
577 }
578
579
wpa_driver_wext_own_ifname(struct wpa_driver_wext_data * drv,u8 * buf,size_t len)580 static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv,
581 u8 *buf, size_t len)
582 {
583 int attrlen, rta_len;
584 struct rtattr *attr;
585
586 attrlen = len;
587 attr = (struct rtattr *) buf;
588
589 rta_len = RTA_ALIGN(sizeof(struct rtattr));
590 while (RTA_OK(attr, attrlen)) {
591 if (attr->rta_type == IFLA_IFNAME) {
592 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
593 == 0)
594 return 1;
595 else
596 break;
597 }
598 attr = RTA_NEXT(attr, attrlen);
599 }
600
601 return 0;
602 }
603
604
wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data * drv,int ifindex,u8 * buf,size_t len)605 static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv,
606 int ifindex, u8 *buf, size_t len)
607 {
608 if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
609 return 1;
610
611 if (drv->if_removed && wpa_driver_wext_own_ifname(drv, buf, len)) {
612 drv->ifindex = if_nametoindex(drv->ifname);
613 wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed "
614 "interface");
615 wpa_driver_wext_finish_drv_init(drv);
616 return 1;
617 }
618
619 return 0;
620 }
621
622
wpa_driver_wext_event_rtm_newlink(void * ctx,struct ifinfomsg * ifi,u8 * buf,size_t len)623 static void wpa_driver_wext_event_rtm_newlink(void *ctx, struct ifinfomsg *ifi,
624 u8 *buf, size_t len)
625 {
626 struct wpa_driver_wext_data *drv = ctx;
627 int attrlen, rta_len;
628 struct rtattr *attr;
629 char namebuf[IFNAMSIZ];
630
631 if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, buf, len)) {
632 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
633 ifi->ifi_index);
634 return;
635 }
636
637 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
638 "(%s%s%s%s)",
639 drv->operstate, ifi->ifi_flags,
640 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
641 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
642 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
643 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
644
645 if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
646 wpa_printf(MSG_DEBUG, "WEXT: Interface down");
647 drv->if_disabled = 1;
648 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL);
649 }
650
651 if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
652 if (if_indextoname(ifi->ifi_index, namebuf) &&
653 linux_iface_up(drv->ioctl_sock, drv->ifname) == 0) {
654 wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up "
655 "event since interface %s is down",
656 namebuf);
657 } else if (if_nametoindex(drv->ifname) == 0) {
658 wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up "
659 "event since interface %s does not exist",
660 drv->ifname);
661 } else if (drv->if_removed) {
662 wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up "
663 "event since interface %s is marked "
664 "removed", drv->ifname);
665 } else {
666 wpa_printf(MSG_DEBUG, "WEXT: Interface up");
667 drv->if_disabled = 0;
668 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED,
669 NULL);
670 }
671 }
672
673 /*
674 * Some drivers send the association event before the operup event--in
675 * this case, lifting operstate in wpa_driver_wext_set_operstate()
676 * fails. This will hit us when wpa_supplicant does not need to do
677 * IEEE 802.1X authentication
678 */
679 if (drv->operstate == 1 &&
680 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
681 !(ifi->ifi_flags & IFF_RUNNING))
682 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
683 -1, IF_OPER_UP);
684
685 attrlen = len;
686 attr = (struct rtattr *) buf;
687
688 rta_len = RTA_ALIGN(sizeof(struct rtattr));
689 while (RTA_OK(attr, attrlen)) {
690 if (attr->rta_type == IFLA_WIRELESS) {
691 wpa_driver_wext_event_wireless(
692 drv, ((char *) attr) + rta_len,
693 attr->rta_len - rta_len);
694 } else if (attr->rta_type == IFLA_IFNAME) {
695 wpa_driver_wext_event_link(drv,
696 ((char *) attr) + rta_len,
697 attr->rta_len - rta_len, 0);
698 }
699 attr = RTA_NEXT(attr, attrlen);
700 }
701 }
702
703
wpa_driver_wext_event_rtm_dellink(void * ctx,struct ifinfomsg * ifi,u8 * buf,size_t len)704 static void wpa_driver_wext_event_rtm_dellink(void *ctx, struct ifinfomsg *ifi,
705 u8 *buf, size_t len)
706 {
707 struct wpa_driver_wext_data *drv = ctx;
708 int attrlen, rta_len;
709 struct rtattr *attr;
710
711 attrlen = len;
712 attr = (struct rtattr *) buf;
713
714 rta_len = RTA_ALIGN(sizeof(struct rtattr));
715 while (RTA_OK(attr, attrlen)) {
716 if (attr->rta_type == IFLA_IFNAME) {
717 wpa_driver_wext_event_link(drv,
718 ((char *) attr) + rta_len,
719 attr->rta_len - rta_len, 1);
720 }
721 attr = RTA_NEXT(attr, attrlen);
722 }
723 }
724
725
wpa_driver_wext_rfkill_blocked(void * ctx)726 static void wpa_driver_wext_rfkill_blocked(void *ctx)
727 {
728 wpa_printf(MSG_DEBUG, "WEXT: RFKILL blocked");
729 /*
730 * This may be for any interface; use ifdown event to disable
731 * interface.
732 */
733 }
734
735
wpa_driver_wext_rfkill_unblocked(void * ctx)736 static void wpa_driver_wext_rfkill_unblocked(void *ctx)
737 {
738 struct wpa_driver_wext_data *drv = ctx;
739 wpa_printf(MSG_DEBUG, "WEXT: RFKILL unblocked");
740 if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1)) {
741 wpa_printf(MSG_DEBUG, "WEXT: Could not set interface UP "
742 "after rfkill unblock");
743 return;
744 }
745 /* rtnetlink ifup handler will report interface as enabled */
746 }
747
748
wext_get_phy_name(struct wpa_driver_wext_data * drv)749 static void wext_get_phy_name(struct wpa_driver_wext_data *drv)
750 {
751 /* Find phy (radio) to which this interface belongs */
752 char buf[90], *pos;
753 int f, rv;
754
755 drv->phyname[0] = '\0';
756 snprintf(buf, sizeof(buf) - 1, "/sys/class/net/%s/phy80211/name",
757 drv->ifname);
758 f = open(buf, O_RDONLY);
759 if (f < 0) {
760 wpa_printf(MSG_DEBUG, "Could not open file %s: %s",
761 buf, strerror(errno));
762 return;
763 }
764
765 rv = read(f, drv->phyname, sizeof(drv->phyname) - 1);
766 close(f);
767 if (rv < 0) {
768 wpa_printf(MSG_DEBUG, "Could not read file %s: %s",
769 buf, strerror(errno));
770 return;
771 }
772
773 drv->phyname[rv] = '\0';
774 pos = os_strchr(drv->phyname, '\n');
775 if (pos)
776 *pos = '\0';
777 wpa_printf(MSG_DEBUG, "wext: interface %s phy: %s",
778 drv->ifname, drv->phyname);
779 }
780
781
782 /**
783 * wpa_driver_wext_init - Initialize WE driver interface
784 * @ctx: context to be used when calling wpa_supplicant functions,
785 * e.g., wpa_supplicant_event()
786 * @ifname: interface name, e.g., wlan0
787 * Returns: Pointer to private data, %NULL on failure
788 */
wpa_driver_wext_init(void * ctx,const char * ifname)789 void * wpa_driver_wext_init(void *ctx, const char *ifname)
790 {
791 struct wpa_driver_wext_data *drv;
792 struct netlink_config *cfg;
793 struct rfkill_config *rcfg;
794 char path[128];
795 struct stat buf;
796
797 drv = os_zalloc(sizeof(*drv));
798 if (drv == NULL)
799 return NULL;
800 drv->ctx = ctx;
801 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
802
803 os_snprintf(path, sizeof(path), "/sys/class/net/%s/phy80211", ifname);
804 if (stat(path, &buf) == 0) {
805 wpa_printf(MSG_DEBUG, "WEXT: cfg80211-based driver detected");
806 drv->cfg80211 = 1;
807 wext_get_phy_name(drv);
808 }
809
810 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
811 if (drv->ioctl_sock < 0) {
812 wpa_printf(MSG_ERROR, "socket(PF_INET,SOCK_DGRAM): %s",
813 strerror(errno));
814 goto err1;
815 }
816
817 cfg = os_zalloc(sizeof(*cfg));
818 if (cfg == NULL)
819 goto err1;
820 cfg->ctx = drv;
821 cfg->newlink_cb = wpa_driver_wext_event_rtm_newlink;
822 cfg->dellink_cb = wpa_driver_wext_event_rtm_dellink;
823 drv->netlink = netlink_init(cfg);
824 if (drv->netlink == NULL) {
825 os_free(cfg);
826 goto err2;
827 }
828
829 rcfg = os_zalloc(sizeof(*rcfg));
830 if (rcfg == NULL)
831 goto err3;
832 rcfg->ctx = drv;
833 os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
834 rcfg->blocked_cb = wpa_driver_wext_rfkill_blocked;
835 rcfg->unblocked_cb = wpa_driver_wext_rfkill_unblocked;
836 drv->rfkill = rfkill_init(rcfg);
837 if (drv->rfkill == NULL) {
838 wpa_printf(MSG_DEBUG, "WEXT: RFKILL status not available");
839 os_free(rcfg);
840 }
841
842 drv->mlme_sock = -1;
843
844 if (wpa_driver_wext_finish_drv_init(drv) < 0)
845 goto err3;
846
847 wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 1);
848
849 return drv;
850
851 err3:
852 rfkill_deinit(drv->rfkill);
853 netlink_deinit(drv->netlink);
854 err2:
855 close(drv->ioctl_sock);
856 err1:
857 os_free(drv);
858 return NULL;
859 }
860
861
wpa_driver_wext_send_rfkill(void * eloop_ctx,void * timeout_ctx)862 static void wpa_driver_wext_send_rfkill(void *eloop_ctx, void *timeout_ctx)
863 {
864 wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
865 }
866
867
wext_hostap_ifname(struct wpa_driver_wext_data * drv,const char * ifname)868 static int wext_hostap_ifname(struct wpa_driver_wext_data *drv,
869 const char *ifname)
870 {
871 char buf[200], *res;
872 int type, ret;
873 FILE *f;
874
875 if (strcmp(ifname, ".") == 0 || strcmp(ifname, "..") == 0)
876 return -1;
877
878 ret = snprintf(buf, sizeof(buf), "/sys/class/net/%s/device/net/%s/type",
879 drv->ifname, ifname);
880 if (os_snprintf_error(sizeof(buf), ret))
881 return -1;
882
883 f = fopen(buf, "r");
884 if (!f)
885 return -1;
886 res = fgets(buf, sizeof(buf), f);
887 fclose(f);
888
889 type = res ? atoi(res) : -1;
890 wpa_printf(MSG_DEBUG, "WEXT: hostap ifname %s type %d", ifname, type);
891
892 if (type == ARPHRD_IEEE80211) {
893 wpa_printf(MSG_DEBUG,
894 "WEXT: Found hostap driver wifi# interface (%s)",
895 ifname);
896 wpa_driver_wext_alternative_ifindex(drv, ifname);
897 return 0;
898 }
899 return -1;
900 }
901
902
wext_add_hostap(struct wpa_driver_wext_data * drv)903 static int wext_add_hostap(struct wpa_driver_wext_data *drv)
904 {
905 char buf[200];
906 int n;
907 struct dirent **names;
908 int ret = -1;
909
910 snprintf(buf, sizeof(buf), "/sys/class/net/%s/device/net", drv->ifname);
911 n = scandir(buf, &names, NULL, alphasort);
912 if (n < 0)
913 return -1;
914
915 while (n--) {
916 if (ret < 0 && wext_hostap_ifname(drv, names[n]->d_name) == 0)
917 ret = 0;
918 free(names[n]);
919 }
920 free(names);
921
922 return ret;
923 }
924
925
wext_check_hostap(struct wpa_driver_wext_data * drv)926 static void wext_check_hostap(struct wpa_driver_wext_data *drv)
927 {
928 char path[200], buf[200], *pos;
929 ssize_t res;
930
931 /*
932 * Host AP driver may use both wlan# and wifi# interface in wireless
933 * events. Since some of the versions included WE-18 support, let's add
934 * the alternative ifindex also from driver_wext.c for the time being.
935 * This may be removed at some point once it is believed that old
936 * versions of the driver are not in use anymore. However, it looks like
937 * the wifi# interface is still used in the current kernel tree, so it
938 * may not really be possible to remove this before the Host AP driver
939 * gets removed from the kernel.
940 */
941
942 /* First, try to see if driver information is available from sysfs */
943 snprintf(path, sizeof(path), "/sys/class/net/%s/device/driver",
944 drv->ifname);
945 res = readlink(path, buf, sizeof(buf) - 1);
946 if (res > 0) {
947 buf[res] = '\0';
948 pos = strrchr(buf, '/');
949 if (pos)
950 pos++;
951 else
952 pos = buf;
953 wpa_printf(MSG_DEBUG, "WEXT: Driver: %s", pos);
954 if (os_strncmp(pos, "hostap", 6) == 0 &&
955 wext_add_hostap(drv) == 0)
956 return;
957 }
958
959 /* Second, use the old design with hardcoded ifname */
960 if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
961 char ifname2[IFNAMSIZ + 1];
962 os_strlcpy(ifname2, drv->ifname, sizeof(ifname2));
963 os_memcpy(ifname2, "wifi", 4);
964 wpa_driver_wext_alternative_ifindex(drv, ifname2);
965 }
966 }
967
968
wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data * drv)969 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
970 {
971 int send_rfkill_event = 0;
972 int i;
973
974 if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1) < 0) {
975 if (rfkill_is_blocked(drv->rfkill)) {
976 wpa_printf(MSG_DEBUG, "WEXT: Could not yet enable "
977 "interface '%s' due to rfkill",
978 drv->ifname);
979 drv->if_disabled = 1;
980 send_rfkill_event = 1;
981 } else {
982 wpa_printf(MSG_ERROR, "WEXT: Could not set "
983 "interface '%s' UP", drv->ifname);
984 return -1;
985 }
986 }
987
988 /*
989 * Make sure that the driver does not have any obsolete PMKID entries.
990 */
991 wpa_driver_wext_flush_pmkid(drv);
992
993 if (wpa_driver_wext_set_mode(drv, 0) < 0) {
994 wpa_printf(MSG_DEBUG, "Could not configure driver to use "
995 "managed mode");
996 /* Try to use it anyway */
997 }
998
999 wpa_driver_wext_get_range(drv);
1000
1001 /* Update per interface supported AKMs */
1002 for (i = 0; i < WPA_IF_MAX; i++)
1003 drv->capa.key_mgmt_iftype[i] = drv->capa.key_mgmt;
1004
1005 /*
1006 * Unlock the driver's BSSID and force to a random SSID to clear any
1007 * previous association the driver might have when the supplicant
1008 * starts up.
1009 */
1010 wpa_driver_wext_disconnect(drv);
1011
1012 drv->ifindex = if_nametoindex(drv->ifname);
1013
1014 wext_check_hostap(drv);
1015
1016 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1017 1, IF_OPER_DORMANT);
1018
1019 if (send_rfkill_event) {
1020 eloop_register_timeout(0, 0, wpa_driver_wext_send_rfkill,
1021 drv, drv->ctx);
1022 }
1023
1024 return 0;
1025 }
1026
1027
1028 /**
1029 * wpa_driver_wext_deinit - Deinitialize WE driver interface
1030 * @priv: Pointer to private wext data from wpa_driver_wext_init()
1031 *
1032 * Shut down driver interface and processing of driver events. Free
1033 * private data buffer if one was allocated in wpa_driver_wext_init().
1034 */
wpa_driver_wext_deinit(void * priv)1035 void wpa_driver_wext_deinit(void *priv)
1036 {
1037 struct wpa_driver_wext_data *drv = priv;
1038
1039 wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 0);
1040
1041 eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1042 eloop_cancel_timeout(wpa_driver_wext_send_rfkill, drv, drv->ctx);
1043
1044 /*
1045 * Clear possibly configured driver parameters in order to make it
1046 * easier to use the driver after wpa_supplicant has been terminated.
1047 */
1048 wpa_driver_wext_disconnect(drv);
1049
1050 netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1051 netlink_deinit(drv->netlink);
1052 rfkill_deinit(drv->rfkill);
1053
1054 if (drv->mlme_sock >= 0)
1055 eloop_unregister_read_sock(drv->mlme_sock);
1056
1057 (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0);
1058
1059 close(drv->ioctl_sock);
1060 if (drv->mlme_sock >= 0)
1061 close(drv->mlme_sock);
1062 os_free(drv->assoc_req_ies);
1063 os_free(drv->assoc_resp_ies);
1064 os_free(drv);
1065 }
1066
1067
1068 /**
1069 * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
1070 * @eloop_ctx: Unused
1071 * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
1072 *
1073 * This function can be used as registered timeout when starting a scan to
1074 * generate a scan completed event if the driver does not report this.
1075 */
wpa_driver_wext_scan_timeout(void * eloop_ctx,void * timeout_ctx)1076 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1077 {
1078 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1079 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1080 }
1081
1082
1083 /**
1084 * wpa_driver_wext_scan - Request the driver to initiate scan
1085 * @priv: Pointer to private wext data from wpa_driver_wext_init()
1086 * @param: Scan parameters (specific SSID to scan for (ProbeReq), etc.)
1087 * Returns: 0 on success, -1 on failure
1088 */
wpa_driver_wext_scan(void * priv,struct wpa_driver_scan_params * params)1089 int wpa_driver_wext_scan(void *priv, struct wpa_driver_scan_params *params)
1090 {
1091 struct wpa_driver_wext_data *drv = priv;
1092 struct iwreq iwr;
1093 int ret = 0, timeout;
1094 struct iw_scan_req req;
1095 const u8 *ssid = params->ssids[0].ssid;
1096 size_t ssid_len = params->ssids[0].ssid_len;
1097
1098 if (ssid_len > IW_ESSID_MAX_SIZE) {
1099 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1100 __FUNCTION__, (unsigned long) ssid_len);
1101 return -1;
1102 }
1103
1104 os_memset(&iwr, 0, sizeof(iwr));
1105 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1106
1107 if (ssid && ssid_len) {
1108 os_memset(&req, 0, sizeof(req));
1109 req.essid_len = ssid_len;
1110 req.bssid.sa_family = ARPHRD_ETHER;
1111 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1112 os_memcpy(req.essid, ssid, ssid_len);
1113 iwr.u.data.pointer = (caddr_t) &req;
1114 iwr.u.data.length = sizeof(req);
1115 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1116 }
1117
1118 if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1119 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWSCAN]: %s",
1120 strerror(errno));
1121 ret = -1;
1122 }
1123
1124 /* Not all drivers generate "scan completed" wireless event, so try to
1125 * read results after a timeout. */
1126 timeout = 10;
1127 if (drv->scan_complete_events) {
1128 /*
1129 * The driver seems to deliver SIOCGIWSCAN events to notify
1130 * when scan is complete, so use longer timeout to avoid race
1131 * conditions with scanning and following association request.
1132 */
1133 timeout = 30;
1134 }
1135 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1136 "seconds", ret, timeout);
1137 eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1138 eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
1139 drv->ctx);
1140
1141 return ret;
1142 }
1143
1144
wpa_driver_wext_giwscan(struct wpa_driver_wext_data * drv,size_t * len)1145 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
1146 size_t *len)
1147 {
1148 struct iwreq iwr;
1149 u8 *res_buf;
1150 size_t res_buf_len;
1151
1152 res_buf_len = IW_SCAN_MAX_DATA;
1153 for (;;) {
1154 res_buf = os_malloc(res_buf_len);
1155 if (res_buf == NULL)
1156 return NULL;
1157 os_memset(&iwr, 0, sizeof(iwr));
1158 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1159 iwr.u.data.pointer = res_buf;
1160 iwr.u.data.length = res_buf_len;
1161
1162 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1163 break;
1164
1165 if (errno == E2BIG && res_buf_len < 65535) {
1166 os_free(res_buf);
1167 res_buf = NULL;
1168 res_buf_len *= 2;
1169 if (res_buf_len > 65535)
1170 res_buf_len = 65535; /* 16-bit length field */
1171 wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1172 "trying larger buffer (%lu bytes)",
1173 (unsigned long) res_buf_len);
1174 } else {
1175 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWSCAN]: %s",
1176 strerror(errno));
1177 os_free(res_buf);
1178 return NULL;
1179 }
1180 }
1181
1182 if (iwr.u.data.length > res_buf_len) {
1183 os_free(res_buf);
1184 return NULL;
1185 }
1186 *len = iwr.u.data.length;
1187
1188 return res_buf;
1189 }
1190
1191
1192 /*
1193 * Data structure for collecting WEXT scan results. This is needed to allow
1194 * the various methods of reporting IEs to be combined into a single IE buffer.
1195 */
1196 struct wext_scan_data {
1197 struct wpa_scan_res res;
1198 u8 *ie;
1199 size_t ie_len;
1200 u8 ssid[SSID_MAX_LEN];
1201 size_t ssid_len;
1202 int maxrate;
1203 };
1204
1205
wext_get_scan_mode(struct iw_event * iwe,struct wext_scan_data * res)1206 static void wext_get_scan_mode(struct iw_event *iwe,
1207 struct wext_scan_data *res)
1208 {
1209 if (iwe->u.mode == IW_MODE_ADHOC)
1210 res->res.caps |= IEEE80211_CAP_IBSS;
1211 else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1212 res->res.caps |= IEEE80211_CAP_ESS;
1213 }
1214
1215
wext_get_scan_ssid(struct iw_event * iwe,struct wext_scan_data * res,char * custom,char * end)1216 static void wext_get_scan_ssid(struct iw_event *iwe,
1217 struct wext_scan_data *res, char *custom,
1218 char *end)
1219 {
1220 int ssid_len = iwe->u.essid.length;
1221 if (ssid_len > end - custom)
1222 return;
1223 if (iwe->u.essid.flags &&
1224 ssid_len > 0 &&
1225 ssid_len <= IW_ESSID_MAX_SIZE) {
1226 os_memcpy(res->ssid, custom, ssid_len);
1227 res->ssid_len = ssid_len;
1228 }
1229 }
1230
1231
wext_get_scan_freq(struct iw_event * iwe,struct wext_scan_data * res)1232 static void wext_get_scan_freq(struct iw_event *iwe,
1233 struct wext_scan_data *res)
1234 {
1235 int divi = 1000000, i;
1236
1237 if (iwe->u.freq.e == 0) {
1238 /*
1239 * Some drivers do not report frequency, but a channel.
1240 * Try to map this to frequency by assuming they are using
1241 * IEEE 802.11b/g. But don't overwrite a previously parsed
1242 * frequency if the driver sends both frequency and channel,
1243 * since the driver may be sending an A-band channel that we
1244 * don't handle here.
1245 */
1246
1247 if (res->res.freq)
1248 return;
1249
1250 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1251 res->res.freq = 2407 + 5 * iwe->u.freq.m;
1252 return;
1253 } else if (iwe->u.freq.m == 14) {
1254 res->res.freq = 2484;
1255 return;
1256 }
1257 }
1258
1259 if (iwe->u.freq.e > 6) {
1260 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1261 MACSTR " m=%d e=%d)",
1262 MAC2STR(res->res.bssid), iwe->u.freq.m,
1263 iwe->u.freq.e);
1264 return;
1265 }
1266
1267 for (i = 0; i < iwe->u.freq.e; i++)
1268 divi /= 10;
1269 res->res.freq = iwe->u.freq.m / divi;
1270 }
1271
1272
wext_get_scan_qual(struct wpa_driver_wext_data * drv,struct iw_event * iwe,struct wext_scan_data * res)1273 static void wext_get_scan_qual(struct wpa_driver_wext_data *drv,
1274 struct iw_event *iwe,
1275 struct wext_scan_data *res)
1276 {
1277 res->res.qual = iwe->u.qual.qual;
1278 res->res.noise = iwe->u.qual.noise;
1279 res->res.level = iwe->u.qual.level;
1280 if (iwe->u.qual.updated & IW_QUAL_QUAL_INVALID)
1281 res->res.flags |= WPA_SCAN_QUAL_INVALID;
1282 if (iwe->u.qual.updated & IW_QUAL_LEVEL_INVALID)
1283 res->res.flags |= WPA_SCAN_LEVEL_INVALID;
1284 if (iwe->u.qual.updated & IW_QUAL_NOISE_INVALID)
1285 res->res.flags |= WPA_SCAN_NOISE_INVALID;
1286 if (iwe->u.qual.updated & IW_QUAL_DBM)
1287 res->res.flags |= WPA_SCAN_LEVEL_DBM;
1288 if ((iwe->u.qual.updated & IW_QUAL_DBM) ||
1289 ((iwe->u.qual.level != 0) &&
1290 (iwe->u.qual.level > drv->max_level))) {
1291 if (iwe->u.qual.level >= 64)
1292 res->res.level -= 0x100;
1293 if (iwe->u.qual.noise >= 64)
1294 res->res.noise -= 0x100;
1295 }
1296 }
1297
1298
wext_get_scan_encode(struct iw_event * iwe,struct wext_scan_data * res)1299 static void wext_get_scan_encode(struct iw_event *iwe,
1300 struct wext_scan_data *res)
1301 {
1302 if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1303 res->res.caps |= IEEE80211_CAP_PRIVACY;
1304 }
1305
1306
wext_get_scan_rate(struct iw_event * iwe,struct wext_scan_data * res,char * pos,char * end)1307 static void wext_get_scan_rate(struct iw_event *iwe,
1308 struct wext_scan_data *res, char *pos,
1309 char *end)
1310 {
1311 int maxrate;
1312 char *custom = pos + IW_EV_LCP_LEN;
1313 struct iw_param p;
1314 size_t clen;
1315
1316 clen = iwe->len;
1317 if (clen > (size_t) (end - custom))
1318 return;
1319 maxrate = 0;
1320 while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1321 /* Note: may be misaligned, make a local, aligned copy */
1322 os_memcpy(&p, custom, sizeof(struct iw_param));
1323 if (p.value > maxrate)
1324 maxrate = p.value;
1325 clen -= sizeof(struct iw_param);
1326 custom += sizeof(struct iw_param);
1327 }
1328
1329 /* Convert the maxrate from WE-style (b/s units) to
1330 * 802.11 rates (500000 b/s units).
1331 */
1332 res->maxrate = maxrate / 500000;
1333 }
1334
1335
wext_get_scan_iwevgenie(struct iw_event * iwe,struct wext_scan_data * res,char * custom,char * end)1336 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1337 struct wext_scan_data *res, char *custom,
1338 char *end)
1339 {
1340 char *genie, *gpos, *gend;
1341 u8 *tmp;
1342
1343 if (iwe->u.data.length == 0)
1344 return;
1345
1346 gpos = genie = custom;
1347 gend = genie + iwe->u.data.length;
1348 if (gend > end) {
1349 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1350 return;
1351 }
1352
1353 tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1354 if (tmp == NULL)
1355 return;
1356 os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1357 res->ie = tmp;
1358 res->ie_len += gend - gpos;
1359 }
1360
1361
wext_get_scan_custom(struct iw_event * iwe,struct wext_scan_data * res,char * custom,char * end)1362 static void wext_get_scan_custom(struct iw_event *iwe,
1363 struct wext_scan_data *res, char *custom,
1364 char *end)
1365 {
1366 size_t clen;
1367 u8 *tmp;
1368
1369 clen = iwe->u.data.length;
1370 if (clen > (size_t) (end - custom))
1371 return;
1372
1373 if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1374 char *spos;
1375 int bytes;
1376 spos = custom + 7;
1377 bytes = custom + clen - spos;
1378 if (bytes & 1 || bytes == 0)
1379 return;
1380 bytes /= 2;
1381 tmp = os_realloc(res->ie, res->ie_len + bytes);
1382 if (tmp == NULL)
1383 return;
1384 res->ie = tmp;
1385 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1386 return;
1387 res->ie_len += bytes;
1388 } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1389 char *spos;
1390 int bytes;
1391 spos = custom + 7;
1392 bytes = custom + clen - spos;
1393 if (bytes & 1 || bytes == 0)
1394 return;
1395 bytes /= 2;
1396 tmp = os_realloc(res->ie, res->ie_len + bytes);
1397 if (tmp == NULL)
1398 return;
1399 res->ie = tmp;
1400 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1401 return;
1402 res->ie_len += bytes;
1403 } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1404 char *spos;
1405 int bytes;
1406 u8 bin[8];
1407 spos = custom + 4;
1408 bytes = custom + clen - spos;
1409 if (bytes != 16) {
1410 wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1411 return;
1412 }
1413 bytes /= 2;
1414 if (hexstr2bin(spos, bin, bytes) < 0) {
1415 wpa_printf(MSG_DEBUG, "WEXT: Invalid TSF value");
1416 return;
1417 }
1418 res->res.tsf += WPA_GET_BE64(bin);
1419 }
1420 }
1421
1422
wext_19_iw_point(struct wpa_driver_wext_data * drv,u16 cmd)1423 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1424 {
1425 return drv->we_version_compiled > 18 &&
1426 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1427 cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1428 }
1429
1430
wpa_driver_wext_add_scan_entry(struct wpa_scan_results * res,struct wext_scan_data * data)1431 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1432 struct wext_scan_data *data)
1433 {
1434 struct wpa_scan_res **tmp;
1435 struct wpa_scan_res *r;
1436 size_t extra_len;
1437 u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1438
1439 /* Figure out whether we need to fake any IEs */
1440 pos = data->ie;
1441 end = pos + data->ie_len;
1442 while (pos && end - pos > 1) {
1443 if (2 + pos[1] > end - pos)
1444 break;
1445 if (pos[0] == WLAN_EID_SSID)
1446 ssid_ie = pos;
1447 else if (pos[0] == WLAN_EID_SUPP_RATES)
1448 rate_ie = pos;
1449 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1450 rate_ie = pos;
1451 pos += 2 + pos[1];
1452 }
1453
1454 extra_len = 0;
1455 if (ssid_ie == NULL)
1456 extra_len += 2 + data->ssid_len;
1457 if (rate_ie == NULL && data->maxrate)
1458 extra_len += 3;
1459
1460 r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1461 if (r == NULL)
1462 return;
1463 os_memcpy(r, &data->res, sizeof(*r));
1464 r->ie_len = extra_len + data->ie_len;
1465 pos = (u8 *) (r + 1);
1466 if (ssid_ie == NULL) {
1467 /*
1468 * Generate a fake SSID IE since the driver did not report
1469 * a full IE list.
1470 */
1471 *pos++ = WLAN_EID_SSID;
1472 *pos++ = data->ssid_len;
1473 os_memcpy(pos, data->ssid, data->ssid_len);
1474 pos += data->ssid_len;
1475 }
1476 if (rate_ie == NULL && data->maxrate) {
1477 /*
1478 * Generate a fake Supported Rates IE since the driver did not
1479 * report a full IE list.
1480 */
1481 *pos++ = WLAN_EID_SUPP_RATES;
1482 *pos++ = 1;
1483 *pos++ = data->maxrate;
1484 }
1485 if (data->ie)
1486 os_memcpy(pos, data->ie, data->ie_len);
1487
1488 tmp = os_realloc_array(res->res, res->num + 1,
1489 sizeof(struct wpa_scan_res *));
1490 if (tmp == NULL) {
1491 os_free(r);
1492 return;
1493 }
1494 tmp[res->num++] = r;
1495 res->res = tmp;
1496 }
1497
1498
1499 /**
1500 * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1501 * @priv: Pointer to private wext data from wpa_driver_wext_init()
1502 * Returns: Scan results on success, -1 on failure
1503 */
wpa_driver_wext_get_scan_results(void * priv)1504 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1505 {
1506 struct wpa_driver_wext_data *drv = priv;
1507 size_t len;
1508 int first;
1509 u8 *res_buf;
1510 struct iw_event iwe_buf, *iwe = &iwe_buf;
1511 char *pos, *end, *custom;
1512 struct wpa_scan_results *res;
1513 struct wext_scan_data data;
1514
1515 res_buf = wpa_driver_wext_giwscan(drv, &len);
1516 if (res_buf == NULL)
1517 return NULL;
1518
1519 first = 1;
1520
1521 res = os_zalloc(sizeof(*res));
1522 if (res == NULL) {
1523 os_free(res_buf);
1524 return NULL;
1525 }
1526
1527 pos = (char *) res_buf;
1528 end = (char *) res_buf + len;
1529 os_memset(&data, 0, sizeof(data));
1530
1531 while ((size_t) (end - pos) >= IW_EV_LCP_LEN) {
1532 /* Event data may be unaligned, so make a local, aligned copy
1533 * before processing. */
1534 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1535 if (iwe->len <= IW_EV_LCP_LEN || iwe->len > end - pos)
1536 break;
1537
1538 custom = pos + IW_EV_POINT_LEN;
1539 if (wext_19_iw_point(drv, iwe->cmd)) {
1540 /* WE-19 removed the pointer from struct iw_point */
1541 char *dpos = (char *) &iwe_buf.u.data.length;
1542 int dlen = dpos - (char *) &iwe_buf;
1543 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1544 sizeof(struct iw_event) - dlen);
1545 } else {
1546 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1547 custom += IW_EV_POINT_OFF;
1548 }
1549
1550 switch (iwe->cmd) {
1551 case SIOCGIWAP:
1552 if (!first)
1553 wpa_driver_wext_add_scan_entry(res, &data);
1554 first = 0;
1555 os_free(data.ie);
1556 os_memset(&data, 0, sizeof(data));
1557 os_memcpy(data.res.bssid,
1558 iwe->u.ap_addr.sa_data, ETH_ALEN);
1559 break;
1560 case SIOCGIWMODE:
1561 wext_get_scan_mode(iwe, &data);
1562 break;
1563 case SIOCGIWESSID:
1564 wext_get_scan_ssid(iwe, &data, custom, end);
1565 break;
1566 case SIOCGIWFREQ:
1567 wext_get_scan_freq(iwe, &data);
1568 break;
1569 case IWEVQUAL:
1570 wext_get_scan_qual(drv, iwe, &data);
1571 break;
1572 case SIOCGIWENCODE:
1573 wext_get_scan_encode(iwe, &data);
1574 break;
1575 case SIOCGIWRATE:
1576 wext_get_scan_rate(iwe, &data, pos, end);
1577 break;
1578 case IWEVGENIE:
1579 wext_get_scan_iwevgenie(iwe, &data, custom, end);
1580 break;
1581 case IWEVCUSTOM:
1582 wext_get_scan_custom(iwe, &data, custom, end);
1583 break;
1584 }
1585
1586 pos += iwe->len;
1587 }
1588 os_free(res_buf);
1589 res_buf = NULL;
1590 if (!first)
1591 wpa_driver_wext_add_scan_entry(res, &data);
1592 os_free(data.ie);
1593
1594 wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1595 (unsigned long) len, (unsigned long) res->num);
1596
1597 return res;
1598 }
1599
1600
wpa_driver_wext_get_range(void * priv)1601 static int wpa_driver_wext_get_range(void *priv)
1602 {
1603 struct wpa_driver_wext_data *drv = priv;
1604 struct iw_range *range;
1605 struct iwreq iwr;
1606 int minlen;
1607 size_t buflen;
1608
1609 /*
1610 * Use larger buffer than struct iw_range in order to allow the
1611 * structure to grow in the future.
1612 */
1613 buflen = sizeof(struct iw_range) + 500;
1614 range = os_zalloc(buflen);
1615 if (range == NULL)
1616 return -1;
1617
1618 os_memset(&iwr, 0, sizeof(iwr));
1619 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1620 iwr.u.data.pointer = (caddr_t) range;
1621 iwr.u.data.length = buflen;
1622
1623 minlen = ((char *) &range->enc_capa) - (char *) range +
1624 sizeof(range->enc_capa);
1625
1626 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1627 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWRANGE]: %s",
1628 strerror(errno));
1629 os_free(range);
1630 return -1;
1631 } else if (iwr.u.data.length >= minlen &&
1632 range->we_version_compiled >= 18) {
1633 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1634 "WE(source)=%d enc_capa=0x%x",
1635 range->we_version_compiled,
1636 range->we_version_source,
1637 range->enc_capa);
1638 drv->has_capability = 1;
1639 drv->we_version_compiled = range->we_version_compiled;
1640 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1641 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1642 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1643 }
1644 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1645 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1646 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1647 }
1648 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1649 WPA_DRIVER_CAPA_ENC_WEP104;
1650 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP128;
1651 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1652 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1653 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1654 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1655 if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
1656 drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE_PSK |
1657 WPA_DRIVER_FLAGS_4WAY_HANDSHAKE_8021X;
1658 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1659 WPA_DRIVER_AUTH_SHARED |
1660 WPA_DRIVER_AUTH_LEAP;
1661 drv->capa.max_scan_ssids = 1;
1662
1663 wpa_printf(MSG_DEBUG, " capabilities: key_mgmt 0x%x enc 0x%x "
1664 "flags 0x%llx",
1665 drv->capa.key_mgmt, drv->capa.enc,
1666 (unsigned long long) drv->capa.flags);
1667 } else {
1668 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1669 "assuming WPA is not supported");
1670 }
1671
1672 drv->max_level = range->max_qual.level;
1673
1674 os_free(range);
1675 return 0;
1676 }
1677
1678
wpa_driver_wext_set_psk(struct wpa_driver_wext_data * drv,const u8 * psk)1679 static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
1680 const u8 *psk)
1681 {
1682 struct iw_encode_ext *ext;
1683 struct iwreq iwr;
1684 int ret;
1685
1686 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1687
1688 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE_8021X))
1689 return 0;
1690
1691 if (!psk)
1692 return 0;
1693
1694 os_memset(&iwr, 0, sizeof(iwr));
1695 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1696
1697 ext = os_zalloc(sizeof(*ext) + PMK_LEN);
1698 if (ext == NULL)
1699 return -1;
1700
1701 iwr.u.encoding.pointer = (caddr_t) ext;
1702 iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
1703 ext->key_len = PMK_LEN;
1704 os_memcpy(&ext->key, psk, ext->key_len);
1705 ext->alg = IW_ENCODE_ALG_PMK;
1706
1707 ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
1708 if (ret < 0)
1709 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODEEXT] PMK: %s",
1710 strerror(errno));
1711 os_free(ext);
1712
1713 return ret;
1714 }
1715
1716
wpa_driver_wext_set_key_ext(void * priv,enum 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,enum key_flag key_flag)1717 static int wpa_driver_wext_set_key_ext(void *priv, enum wpa_alg alg,
1718 const u8 *addr, int key_idx,
1719 int set_tx, const u8 *seq,
1720 size_t seq_len,
1721 const u8 *key, size_t key_len,
1722 enum key_flag key_flag)
1723 {
1724 struct wpa_driver_wext_data *drv = priv;
1725 struct iwreq iwr;
1726 int ret = 0;
1727 struct iw_encode_ext *ext;
1728
1729 if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1730 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1731 __FUNCTION__, (unsigned long) seq_len);
1732 return -1;
1733 }
1734
1735 ext = os_zalloc(sizeof(*ext) + key_len);
1736 if (ext == NULL)
1737 return -1;
1738 os_memset(&iwr, 0, sizeof(iwr));
1739 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1740 iwr.u.encoding.flags = key_idx + 1;
1741 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1742 if (alg == WPA_ALG_NONE)
1743 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1744 iwr.u.encoding.pointer = (caddr_t) ext;
1745 iwr.u.encoding.length = sizeof(*ext) + key_len;
1746
1747 if (addr == NULL || is_broadcast_ether_addr(addr))
1748 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1749 if (set_tx)
1750 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1751
1752 ext->addr.sa_family = ARPHRD_ETHER;
1753 if (addr)
1754 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1755 else
1756 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1757 if (key && key_len) {
1758 os_memcpy(ext + 1, key, key_len);
1759 ext->key_len = key_len;
1760 }
1761 if (key_flag & KEY_FLAG_PMK) {
1762 ext->alg = IW_ENCODE_ALG_PMK;
1763 } else {
1764 switch (alg) {
1765 case WPA_ALG_NONE:
1766 ext->alg = IW_ENCODE_ALG_NONE;
1767 break;
1768 case WPA_ALG_WEP:
1769 ext->alg = IW_ENCODE_ALG_WEP;
1770 break;
1771 case WPA_ALG_TKIP:
1772 ext->alg = IW_ENCODE_ALG_TKIP;
1773 break;
1774 case WPA_ALG_CCMP:
1775 ext->alg = IW_ENCODE_ALG_CCMP;
1776 break;
1777 case WPA_ALG_BIP_CMAC_128:
1778 ext->alg = IW_ENCODE_ALG_AES_CMAC;
1779 break;
1780 default:
1781 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1782 __FUNCTION__, alg);
1783 os_free(ext);
1784 return -1;
1785 }
1786 }
1787
1788 if (seq && seq_len) {
1789 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1790 os_memcpy(ext->rx_seq, seq, seq_len);
1791 }
1792
1793 if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1794 ret = errno == EOPNOTSUPP ? -2 : -1;
1795 if (errno == ENODEV) {
1796 /*
1797 * ndiswrapper seems to be returning incorrect error
1798 * code.. */
1799 ret = -2;
1800 }
1801
1802 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODEEXT]: %s",
1803 strerror(errno));
1804 }
1805
1806 os_free(ext);
1807 return ret;
1808 }
1809
1810
1811 /**
1812 * wpa_driver_wext_set_key - Configure encryption key
1813 * @priv: Pointer to private wext data from wpa_driver_wext_init()
1814 * @params: Key parameters
1815 * Returns: 0 on success, -1 on failure
1816 *
1817 * This function uses SIOCSIWENCODEEXT by default, but tries to use
1818 * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1819 */
wpa_driver_wext_set_key(void * priv,struct wpa_driver_set_key_params * params)1820 static int wpa_driver_wext_set_key(void *priv,
1821 struct wpa_driver_set_key_params *params)
1822 {
1823 struct wpa_driver_wext_data *drv = priv;
1824 struct iwreq iwr;
1825 int ret = 0;
1826 enum wpa_alg alg = params->alg;
1827 enum key_flag key_flag = params->key_flag;
1828 const u8 *addr = params->addr;
1829 int key_idx = params->key_idx;
1830 int set_tx = params->set_tx;
1831 const u8 *seq = params->seq;
1832 size_t seq_len = params->seq_len;
1833 const u8 *key = params->key;
1834 size_t key_len = params->key_len;
1835
1836 wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1837 "key_len=%lu",
1838 __FUNCTION__, alg, key_idx, set_tx,
1839 (unsigned long) seq_len, (unsigned long) key_len);
1840
1841 ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1842 seq, seq_len, key, key_len, key_flag);
1843 if (ret == 0)
1844 return 0;
1845
1846 if (ret == -2 &&
1847 (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1848 wpa_printf(MSG_DEBUG, "Driver did not support "
1849 "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1850 ret = 0;
1851 } else {
1852 wpa_printf(MSG_DEBUG, "Driver did not support "
1853 "SIOCSIWENCODEEXT");
1854 return ret;
1855 }
1856
1857 os_memset(&iwr, 0, sizeof(iwr));
1858 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1859 iwr.u.encoding.flags = key_idx + 1;
1860 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1861 if (alg == WPA_ALG_NONE)
1862 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1863 iwr.u.encoding.pointer = (caddr_t) key;
1864 iwr.u.encoding.length = key_len;
1865
1866 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1867 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODE]: %s",
1868 strerror(errno));
1869 ret = -1;
1870 }
1871
1872 if (set_tx && alg != WPA_ALG_NONE) {
1873 os_memset(&iwr, 0, sizeof(iwr));
1874 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1875 iwr.u.encoding.flags = key_idx + 1;
1876 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1877 iwr.u.encoding.pointer = (caddr_t) NULL;
1878 iwr.u.encoding.length = 0;
1879 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1880 wpa_printf(MSG_ERROR,
1881 "ioctl[SIOCSIWENCODE] (set_tx): %s",
1882 strerror(errno));
1883 ret = -1;
1884 }
1885 }
1886
1887 return ret;
1888 }
1889
1890
wpa_driver_wext_set_countermeasures(void * priv,int enabled)1891 static int wpa_driver_wext_set_countermeasures(void *priv,
1892 int enabled)
1893 {
1894 struct wpa_driver_wext_data *drv = priv;
1895 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1896 return wpa_driver_wext_set_auth_param(drv,
1897 IW_AUTH_TKIP_COUNTERMEASURES,
1898 enabled);
1899 }
1900
1901
wpa_driver_wext_set_drop_unencrypted(void * priv,int enabled)1902 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
1903 int enabled)
1904 {
1905 struct wpa_driver_wext_data *drv = priv;
1906 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1907 drv->use_crypt = enabled;
1908 return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1909 enabled);
1910 }
1911
1912
wpa_driver_wext_mlme(struct wpa_driver_wext_data * drv,const u8 * addr,int cmd,u16 reason_code)1913 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
1914 const u8 *addr, int cmd, u16 reason_code)
1915 {
1916 struct iwreq iwr;
1917 struct iw_mlme mlme;
1918 int ret = 0;
1919
1920 os_memset(&iwr, 0, sizeof(iwr));
1921 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1922 os_memset(&mlme, 0, sizeof(mlme));
1923 mlme.cmd = cmd;
1924 mlme.reason_code = reason_code;
1925 mlme.addr.sa_family = ARPHRD_ETHER;
1926 os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1927 iwr.u.data.pointer = (caddr_t) &mlme;
1928 iwr.u.data.length = sizeof(mlme);
1929
1930 if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1931 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMLME]: %s",
1932 strerror(errno));
1933 ret = -1;
1934 }
1935
1936 return ret;
1937 }
1938
1939
wpa_driver_wext_disconnect(struct wpa_driver_wext_data * drv)1940 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv)
1941 {
1942 struct iwreq iwr;
1943 const u8 null_bssid[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
1944 u8 ssid[SSID_MAX_LEN];
1945 int i;
1946
1947 /*
1948 * Only force-disconnect when the card is in infrastructure mode,
1949 * otherwise the driver might interpret the cleared BSSID and random
1950 * SSID as an attempt to create a new ad-hoc network.
1951 */
1952 os_memset(&iwr, 0, sizeof(iwr));
1953 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1954 if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
1955 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWMODE]: %s",
1956 strerror(errno));
1957 iwr.u.mode = IW_MODE_INFRA;
1958 }
1959
1960 if (iwr.u.mode == IW_MODE_INFRA) {
1961 /* Clear the BSSID selection */
1962 if (wpa_driver_wext_set_bssid(drv, null_bssid) < 0) {
1963 wpa_printf(MSG_DEBUG, "WEXT: Failed to clear BSSID "
1964 "selection on disconnect");
1965 }
1966
1967 if (drv->cfg80211) {
1968 /*
1969 * cfg80211 supports SIOCSIWMLME commands, so there is
1970 * no need for the random SSID hack, but clear the
1971 * SSID.
1972 */
1973 if (wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) {
1974 wpa_printf(MSG_DEBUG, "WEXT: Failed to clear "
1975 "SSID on disconnect");
1976 }
1977 return;
1978 }
1979
1980 /*
1981 * Set a random SSID to make sure the driver will not be trying
1982 * to associate with something even if it does not understand
1983 * SIOCSIWMLME commands (or tries to associate automatically
1984 * after deauth/disassoc).
1985 */
1986 for (i = 0; i < SSID_MAX_LEN; i++)
1987 ssid[i] = rand() & 0xFF;
1988 if (wpa_driver_wext_set_ssid(drv, ssid, SSID_MAX_LEN) < 0) {
1989 wpa_printf(MSG_DEBUG, "WEXT: Failed to set bogus "
1990 "SSID to disconnect");
1991 }
1992 }
1993 }
1994
1995
wpa_driver_wext_deauthenticate(void * priv,const u8 * addr,u16 reason_code)1996 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
1997 u16 reason_code)
1998 {
1999 struct wpa_driver_wext_data *drv = priv;
2000 int ret;
2001 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2002 ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
2003 wpa_driver_wext_disconnect(drv);
2004 return ret;
2005 }
2006
2007
wpa_driver_wext_set_gen_ie(void * priv,const u8 * ie,size_t ie_len)2008 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
2009 size_t ie_len)
2010 {
2011 struct wpa_driver_wext_data *drv = priv;
2012 struct iwreq iwr;
2013 int ret = 0;
2014
2015 os_memset(&iwr, 0, sizeof(iwr));
2016 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2017 iwr.u.data.pointer = (caddr_t) ie;
2018 iwr.u.data.length = ie_len;
2019
2020 if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2021 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWGENIE]: %s",
2022 strerror(errno));
2023 ret = -1;
2024 }
2025
2026 return ret;
2027 }
2028
2029
wpa_driver_wext_cipher2wext(int cipher)2030 int wpa_driver_wext_cipher2wext(int cipher)
2031 {
2032 switch (cipher) {
2033 case WPA_CIPHER_NONE:
2034 return IW_AUTH_CIPHER_NONE;
2035 case WPA_CIPHER_WEP40:
2036 return IW_AUTH_CIPHER_WEP40;
2037 case WPA_CIPHER_TKIP:
2038 return IW_AUTH_CIPHER_TKIP;
2039 case WPA_CIPHER_CCMP:
2040 return IW_AUTH_CIPHER_CCMP;
2041 case WPA_CIPHER_WEP104:
2042 return IW_AUTH_CIPHER_WEP104;
2043 default:
2044 return 0;
2045 }
2046 }
2047
2048
wpa_driver_wext_keymgmt2wext(int keymgmt)2049 int wpa_driver_wext_keymgmt2wext(int keymgmt)
2050 {
2051 switch (keymgmt) {
2052 case WPA_KEY_MGMT_IEEE8021X:
2053 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
2054 return IW_AUTH_KEY_MGMT_802_1X;
2055 case WPA_KEY_MGMT_PSK:
2056 return IW_AUTH_KEY_MGMT_PSK;
2057 default:
2058 return 0;
2059 }
2060 }
2061
2062
2063 static int
wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data * drv,struct wpa_driver_associate_params * params)2064 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
2065 struct wpa_driver_associate_params *params)
2066 {
2067 struct iwreq iwr;
2068 int ret = 0;
2069
2070 wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2071 "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2072
2073 os_memset(&iwr, 0, sizeof(iwr));
2074 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2075 /* Just changing mode, not actual keys */
2076 iwr.u.encoding.flags = 0;
2077 iwr.u.encoding.pointer = (caddr_t) NULL;
2078 iwr.u.encoding.length = 0;
2079
2080 /*
2081 * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2082 * different things. Here they are used to indicate Open System vs.
2083 * Shared Key authentication algorithm. However, some drivers may use
2084 * them to select between open/restricted WEP encrypted (open = allow
2085 * both unencrypted and encrypted frames; restricted = only allow
2086 * encrypted frames).
2087 */
2088
2089 if (!drv->use_crypt) {
2090 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2091 } else {
2092 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2093 iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2094 if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2095 iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2096 }
2097
2098 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2099 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODE]: %s",
2100 strerror(errno));
2101 ret = -1;
2102 }
2103
2104 return ret;
2105 }
2106
2107
wpa_driver_wext_associate(void * priv,struct wpa_driver_associate_params * params)2108 int wpa_driver_wext_associate(void *priv,
2109 struct wpa_driver_associate_params *params)
2110 {
2111 struct wpa_driver_wext_data *drv = priv;
2112 int ret = 0;
2113 int allow_unencrypted_eapol;
2114 int value;
2115
2116 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2117
2118 if (drv->cfg80211) {
2119 /*
2120 * Stop cfg80211 from trying to associate before we are done
2121 * with all parameters.
2122 */
2123 if (wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) {
2124 wpa_printf(MSG_DEBUG,
2125 "WEXT: Failed to clear SSID to stop pending cfg80211 association attempts (if any)");
2126 /* continue anyway */
2127 }
2128 }
2129
2130 if (wpa_driver_wext_set_drop_unencrypted(drv, params->drop_unencrypted)
2131 < 0)
2132 ret = -1;
2133 if (wpa_driver_wext_set_auth_alg(drv, params->auth_alg) < 0)
2134 ret = -1;
2135 if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
2136 ret = -1;
2137
2138 /*
2139 * If the driver did not support SIOCSIWAUTH, fallback to
2140 * SIOCSIWENCODE here.
2141 */
2142 if (drv->auth_alg_fallback &&
2143 wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
2144 ret = -1;
2145
2146 if (!params->bssid &&
2147 wpa_driver_wext_set_bssid(drv, NULL) < 0)
2148 ret = -1;
2149
2150 /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2151 * from configuration, not from here, where only the selected suite is
2152 * available */
2153 if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2154 < 0)
2155 ret = -1;
2156 if (params->wpa_proto & WPA_PROTO_RSN)
2157 value = IW_AUTH_WPA_VERSION_WPA2;
2158 else if (params->wpa_proto & WPA_PROTO_WPA)
2159 value = IW_AUTH_WPA_VERSION_WPA;
2160 else
2161 value = IW_AUTH_WPA_VERSION_DISABLED;
2162 if (wpa_driver_wext_set_auth_param(drv,
2163 IW_AUTH_WPA_VERSION, value) < 0)
2164 ret = -1;
2165 value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
2166 if (wpa_driver_wext_set_auth_param(drv,
2167 IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2168 ret = -1;
2169 value = wpa_driver_wext_cipher2wext(params->group_suite);
2170 if (wpa_driver_wext_set_auth_param(drv,
2171 IW_AUTH_CIPHER_GROUP, value) < 0)
2172 ret = -1;
2173 value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
2174 if (wpa_driver_wext_set_auth_param(drv,
2175 IW_AUTH_KEY_MGMT, value) < 0)
2176 ret = -1;
2177 value = params->key_mgmt_suite != WPA_KEY_MGMT_NONE ||
2178 params->pairwise_suite != WPA_CIPHER_NONE ||
2179 params->group_suite != WPA_CIPHER_NONE ||
2180 (params->wpa_proto & (WPA_PROTO_RSN | WPA_PROTO_WPA));
2181 if (wpa_driver_wext_set_auth_param(drv,
2182 IW_AUTH_PRIVACY_INVOKED, value) < 0)
2183 ret = -1;
2184
2185 /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2186 * not using WPA. IEEE 802.1X specifies that these frames are not
2187 * encrypted, but WPA encrypts them when pairwise keys are in use. */
2188 if (params->key_mgmt_suite == WPA_KEY_MGMT_IEEE8021X ||
2189 params->key_mgmt_suite == WPA_KEY_MGMT_PSK)
2190 allow_unencrypted_eapol = 0;
2191 else
2192 allow_unencrypted_eapol = 1;
2193
2194 if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
2195 ret = -1;
2196 if (wpa_driver_wext_set_auth_param(drv,
2197 IW_AUTH_RX_UNENCRYPTED_EAPOL,
2198 allow_unencrypted_eapol) < 0)
2199 ret = -1;
2200 switch (params->mgmt_frame_protection) {
2201 case NO_MGMT_FRAME_PROTECTION:
2202 value = IW_AUTH_MFP_DISABLED;
2203 break;
2204 case MGMT_FRAME_PROTECTION_OPTIONAL:
2205 value = IW_AUTH_MFP_OPTIONAL;
2206 break;
2207 case MGMT_FRAME_PROTECTION_REQUIRED:
2208 value = IW_AUTH_MFP_REQUIRED;
2209 break;
2210 };
2211 if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
2212 ret = -1;
2213 if (params->freq.freq &&
2214 wpa_driver_wext_set_freq(drv, params->freq.freq) < 0)
2215 ret = -1;
2216 if (!drv->cfg80211 &&
2217 wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2218 ret = -1;
2219 if (params->bssid &&
2220 wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2221 ret = -1;
2222 if (drv->cfg80211 &&
2223 wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2224 ret = -1;
2225
2226 return ret;
2227 }
2228
2229
wpa_driver_wext_set_auth_alg(void * priv,int auth_alg)2230 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2231 {
2232 struct wpa_driver_wext_data *drv = priv;
2233 int algs = 0, res;
2234
2235 if (auth_alg & WPA_AUTH_ALG_OPEN)
2236 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2237 if (auth_alg & WPA_AUTH_ALG_SHARED)
2238 algs |= IW_AUTH_ALG_SHARED_KEY;
2239 if (auth_alg & WPA_AUTH_ALG_LEAP)
2240 algs |= IW_AUTH_ALG_LEAP;
2241 if (algs == 0) {
2242 /* at least one algorithm should be set */
2243 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2244 }
2245
2246 res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2247 algs);
2248 drv->auth_alg_fallback = res == -2;
2249 return res;
2250 }
2251
2252
2253 /**
2254 * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2255 * @priv: Pointer to private wext data from wpa_driver_wext_init()
2256 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2257 * Returns: 0 on success, -1 on failure
2258 */
wpa_driver_wext_set_mode(void * priv,int mode)2259 int wpa_driver_wext_set_mode(void *priv, int mode)
2260 {
2261 struct wpa_driver_wext_data *drv = priv;
2262 struct iwreq iwr;
2263 int ret = -1;
2264 unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2265
2266 os_memset(&iwr, 0, sizeof(iwr));
2267 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2268 iwr.u.mode = new_mode;
2269 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2270 ret = 0;
2271 goto done;
2272 }
2273
2274 if (errno != EBUSY) {
2275 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMODE]: %s",
2276 strerror(errno));
2277 goto done;
2278 }
2279
2280 /* mac80211 doesn't allow mode changes while the device is up, so if
2281 * the device isn't in the mode we're about to change to, take device
2282 * down, try to set the mode again, and bring it back up.
2283 */
2284 if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2285 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWMODE]: %s",
2286 strerror(errno));
2287 goto done;
2288 }
2289
2290 if (iwr.u.mode == new_mode) {
2291 ret = 0;
2292 goto done;
2293 }
2294
2295 if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0) == 0) {
2296 /* Try to set the mode again while the interface is down */
2297 iwr.u.mode = new_mode;
2298 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2299 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMODE]: %s",
2300 strerror(errno));
2301 else
2302 ret = 0;
2303
2304 (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1);
2305 }
2306
2307 done:
2308 return ret;
2309 }
2310
2311
wpa_driver_wext_pmksa(struct wpa_driver_wext_data * drv,u32 cmd,const u8 * bssid,const u8 * pmkid)2312 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2313 u32 cmd, const u8 *bssid, const u8 *pmkid)
2314 {
2315 struct iwreq iwr;
2316 struct iw_pmksa pmksa;
2317 int ret = 0;
2318
2319 os_memset(&iwr, 0, sizeof(iwr));
2320 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2321 os_memset(&pmksa, 0, sizeof(pmksa));
2322 pmksa.cmd = cmd;
2323 pmksa.bssid.sa_family = ARPHRD_ETHER;
2324 if (bssid)
2325 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2326 if (pmkid)
2327 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2328 iwr.u.data.pointer = (caddr_t) &pmksa;
2329 iwr.u.data.length = sizeof(pmksa);
2330
2331 if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2332 if (errno != EOPNOTSUPP)
2333 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWPMKSA]: %s",
2334 strerror(errno));
2335 ret = -1;
2336 }
2337
2338 return ret;
2339 }
2340
2341
wpa_driver_wext_add_pmkid(void * priv,struct wpa_pmkid_params * params)2342 static int wpa_driver_wext_add_pmkid(void *priv,
2343 struct wpa_pmkid_params *params)
2344 {
2345 struct wpa_driver_wext_data *drv = priv;
2346 return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, params->bssid,
2347 params->pmkid);
2348 }
2349
2350
wpa_driver_wext_remove_pmkid(void * priv,struct wpa_pmkid_params * params)2351 static int wpa_driver_wext_remove_pmkid(void *priv,
2352 struct wpa_pmkid_params *params)
2353 {
2354 struct wpa_driver_wext_data *drv = priv;
2355 return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, params->bssid,
2356 params->pmkid);
2357 }
2358
2359
wpa_driver_wext_flush_pmkid(void * priv)2360 static int wpa_driver_wext_flush_pmkid(void *priv)
2361 {
2362 struct wpa_driver_wext_data *drv = priv;
2363 return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2364 }
2365
2366
wpa_driver_wext_get_capa(void * priv,struct wpa_driver_capa * capa)2367 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2368 {
2369 struct wpa_driver_wext_data *drv = priv;
2370 if (!drv->has_capability)
2371 return -1;
2372 os_memcpy(capa, &drv->capa, sizeof(*capa));
2373 return 0;
2374 }
2375
2376
wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data * drv,const char * ifname)2377 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2378 const char *ifname)
2379 {
2380 if (ifname == NULL) {
2381 drv->ifindex2 = -1;
2382 return 0;
2383 }
2384
2385 drv->ifindex2 = if_nametoindex(ifname);
2386 if (drv->ifindex2 <= 0)
2387 return -1;
2388
2389 wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2390 "wireless events", drv->ifindex2, ifname);
2391
2392 return 0;
2393 }
2394
2395
wpa_driver_wext_set_operstate(void * priv,int state)2396 int wpa_driver_wext_set_operstate(void *priv, int state)
2397 {
2398 struct wpa_driver_wext_data *drv = priv;
2399
2400 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2401 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2402 drv->operstate = state;
2403 return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
2404 state ? IF_OPER_UP : IF_OPER_DORMANT);
2405 }
2406
2407
wpa_driver_wext_get_version(struct wpa_driver_wext_data * drv)2408 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2409 {
2410 return drv->we_version_compiled;
2411 }
2412
2413
wext_get_radio_name(void * priv)2414 static const char * wext_get_radio_name(void *priv)
2415 {
2416 struct wpa_driver_wext_data *drv = priv;
2417 return drv->phyname;
2418 }
2419
2420
wpa_driver_wext_signal_poll(void * priv,struct wpa_signal_info * si)2421 static int wpa_driver_wext_signal_poll(void *priv, struct wpa_signal_info *si)
2422 {
2423 struct wpa_driver_wext_data *drv = priv;
2424 struct iw_statistics stats;
2425 struct iwreq iwr;
2426
2427 os_memset(si, 0, sizeof(*si));
2428 si->data.signal = -WPA_INVALID_NOISE;
2429 si->current_noise = WPA_INVALID_NOISE;
2430 si->chanwidth = CHAN_WIDTH_UNKNOWN;
2431
2432 os_memset(&iwr, 0, sizeof(iwr));
2433 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2434 iwr.u.data.pointer = (caddr_t) &stats;
2435 iwr.u.data.length = sizeof(stats);
2436 iwr.u.data.flags = 1;
2437
2438 if (ioctl(drv->ioctl_sock, SIOCGIWSTATS, &iwr) < 0) {
2439 wpa_printf(MSG_ERROR, "WEXT: SIOCGIWSTATS: %s",
2440 strerror(errno));
2441 return -1;
2442 }
2443
2444 si->data.signal = stats.qual.level -
2445 ((stats.qual.updated & IW_QUAL_DBM) ? 0x100 : 0);
2446 si->current_noise = stats.qual.noise -
2447 ((stats.qual.updated & IW_QUAL_DBM) ? 0x100 : 0);
2448 return 0;
2449 }
2450
2451
wpa_driver_wext_status(void * priv,char * buf,size_t buflen)2452 static int wpa_driver_wext_status(void *priv, char *buf, size_t buflen)
2453 {
2454 struct wpa_driver_wext_data *drv = priv;
2455 int res;
2456 char *pos, *end;
2457 unsigned char addr[ETH_ALEN];
2458
2459 pos = buf;
2460 end = buf + buflen;
2461
2462 if (linux_get_ifhwaddr(drv->ioctl_sock, drv->ifname, addr))
2463 return -1;
2464
2465 res = os_snprintf(pos, end - pos,
2466 "ifindex=%d\n"
2467 "ifname=%s\n"
2468 "addr=" MACSTR "\n",
2469 drv->ifindex,
2470 drv->ifname,
2471 MAC2STR(addr));
2472 if (os_snprintf_error(end - pos, res))
2473 return pos - buf;
2474 pos += res;
2475
2476 return pos - buf;
2477 }
2478
2479 const struct wpa_driver_ops wpa_driver_wext_ops = {
2480 .name = "wext",
2481 .desc = "Linux wireless extensions (generic)",
2482 .get_bssid = wpa_driver_wext_get_bssid,
2483 .get_ssid = wpa_driver_wext_get_ssid,
2484 .set_key = wpa_driver_wext_set_key,
2485 .set_countermeasures = wpa_driver_wext_set_countermeasures,
2486 .scan2 = wpa_driver_wext_scan,
2487 .get_scan_results2 = wpa_driver_wext_get_scan_results,
2488 .deauthenticate = wpa_driver_wext_deauthenticate,
2489 .associate = wpa_driver_wext_associate,
2490 .init = wpa_driver_wext_init,
2491 .deinit = wpa_driver_wext_deinit,
2492 .add_pmkid = wpa_driver_wext_add_pmkid,
2493 .remove_pmkid = wpa_driver_wext_remove_pmkid,
2494 .flush_pmkid = wpa_driver_wext_flush_pmkid,
2495 .get_capa = wpa_driver_wext_get_capa,
2496 .set_operstate = wpa_driver_wext_set_operstate,
2497 .get_radio_name = wext_get_radio_name,
2498 .signal_poll = wpa_driver_wext_signal_poll,
2499 .status = wpa_driver_wext_status,
2500 };
2501