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 os_memcmp(iwe->u.ap_addr.sa_data,
456 "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
457 0) {
458 os_free(drv->assoc_req_ies);
459 drv->assoc_req_ies = NULL;
460 os_free(drv->assoc_resp_ies);
461 drv->assoc_resp_ies = NULL;
462 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC,
463 NULL);
464
465 } else {
466 wpa_driver_wext_event_assoc_ies(drv);
467 wpa_supplicant_event(drv->ctx, EVENT_ASSOC,
468 NULL);
469 }
470 break;
471 case IWEVMICHAELMICFAILURE:
472 if (iwe->u.data.length > end - custom) {
473 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
474 "IWEVMICHAELMICFAILURE length");
475 return;
476 }
477 wpa_driver_wext_event_wireless_michaelmicfailure(
478 drv->ctx, custom, iwe->u.data.length);
479 break;
480 case IWEVCUSTOM:
481 if (iwe->u.data.length > end - custom) {
482 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
483 "IWEVCUSTOM length");
484 return;
485 }
486 buf = dup_binstr(custom, iwe->u.data.length);
487 if (buf == NULL)
488 return;
489 wpa_driver_wext_event_wireless_custom(drv->ctx, buf);
490 os_free(buf);
491 break;
492 case SIOCGIWSCAN:
493 drv->scan_complete_events = 1;
494 eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
495 drv, drv->ctx);
496 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS,
497 NULL);
498 break;
499 case IWEVASSOCREQIE:
500 if (iwe->u.data.length > end - custom) {
501 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
502 "IWEVASSOCREQIE length");
503 return;
504 }
505 wpa_driver_wext_event_wireless_assocreqie(
506 drv, custom, iwe->u.data.length);
507 break;
508 case IWEVASSOCRESPIE:
509 if (iwe->u.data.length > end - custom) {
510 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
511 "IWEVASSOCRESPIE length");
512 return;
513 }
514 wpa_driver_wext_event_wireless_assocrespie(
515 drv, custom, iwe->u.data.length);
516 break;
517 case IWEVPMKIDCAND:
518 if (iwe->u.data.length > end - custom) {
519 wpa_printf(MSG_DEBUG, "WEXT: Invalid "
520 "IWEVPMKIDCAND length");
521 return;
522 }
523 wpa_driver_wext_event_wireless_pmkidcand(
524 drv, custom, iwe->u.data.length);
525 break;
526 }
527
528 pos += iwe->len;
529 }
530 }
531
532
wpa_driver_wext_event_link(struct wpa_driver_wext_data * drv,char * buf,size_t len,int del)533 static void wpa_driver_wext_event_link(struct wpa_driver_wext_data *drv,
534 char *buf, size_t len, int del)
535 {
536 union wpa_event_data event;
537
538 os_memset(&event, 0, sizeof(event));
539 if (len > sizeof(event.interface_status.ifname))
540 len = sizeof(event.interface_status.ifname) - 1;
541 os_memcpy(event.interface_status.ifname, buf, len);
542 event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
543 EVENT_INTERFACE_ADDED;
544
545 wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
546 del ? "DEL" : "NEW",
547 event.interface_status.ifname,
548 del ? "removed" : "added");
549
550 if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
551 if (del) {
552 if (drv->if_removed) {
553 wpa_printf(MSG_DEBUG, "WEXT: if_removed "
554 "already set - ignore event");
555 return;
556 }
557 drv->if_removed = 1;
558 } else {
559 if (if_nametoindex(drv->ifname) == 0) {
560 wpa_printf(MSG_DEBUG, "WEXT: Interface %s "
561 "does not exist - ignore "
562 "RTM_NEWLINK",
563 drv->ifname);
564 return;
565 }
566 if (!drv->if_removed) {
567 wpa_printf(MSG_DEBUG, "WEXT: if_removed "
568 "already cleared - ignore event");
569 return;
570 }
571 drv->if_removed = 0;
572 }
573 }
574
575 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
576 }
577
578
wpa_driver_wext_own_ifname(struct wpa_driver_wext_data * drv,u8 * buf,size_t len)579 static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv,
580 u8 *buf, size_t len)
581 {
582 int attrlen, rta_len;
583 struct rtattr *attr;
584
585 attrlen = len;
586 attr = (struct rtattr *) buf;
587
588 rta_len = RTA_ALIGN(sizeof(struct rtattr));
589 while (RTA_OK(attr, attrlen)) {
590 if (attr->rta_type == IFLA_IFNAME) {
591 if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
592 == 0)
593 return 1;
594 else
595 break;
596 }
597 attr = RTA_NEXT(attr, attrlen);
598 }
599
600 return 0;
601 }
602
603
wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data * drv,int ifindex,u8 * buf,size_t len)604 static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv,
605 int ifindex, u8 *buf, size_t len)
606 {
607 if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
608 return 1;
609
610 if (drv->if_removed && wpa_driver_wext_own_ifname(drv, buf, len)) {
611 drv->ifindex = if_nametoindex(drv->ifname);
612 wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed "
613 "interface");
614 wpa_driver_wext_finish_drv_init(drv);
615 return 1;
616 }
617
618 return 0;
619 }
620
621
wpa_driver_wext_event_rtm_newlink(void * ctx,struct ifinfomsg * ifi,u8 * buf,size_t len)622 static void wpa_driver_wext_event_rtm_newlink(void *ctx, struct ifinfomsg *ifi,
623 u8 *buf, size_t len)
624 {
625 struct wpa_driver_wext_data *drv = ctx;
626 int attrlen, rta_len;
627 struct rtattr *attr;
628 char namebuf[IFNAMSIZ];
629
630 if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, buf, len)) {
631 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
632 ifi->ifi_index);
633 return;
634 }
635
636 wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
637 "(%s%s%s%s)",
638 drv->operstate, ifi->ifi_flags,
639 (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
640 (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
641 (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
642 (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
643
644 if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
645 wpa_printf(MSG_DEBUG, "WEXT: Interface down");
646 drv->if_disabled = 1;
647 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL);
648 }
649
650 if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
651 if (if_indextoname(ifi->ifi_index, namebuf) &&
652 linux_iface_up(drv->ioctl_sock, drv->ifname) == 0) {
653 wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up "
654 "event since interface %s is down",
655 namebuf);
656 } else if (if_nametoindex(drv->ifname) == 0) {
657 wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up "
658 "event since interface %s does not exist",
659 drv->ifname);
660 } else if (drv->if_removed) {
661 wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up "
662 "event since interface %s is marked "
663 "removed", drv->ifname);
664 } else {
665 wpa_printf(MSG_DEBUG, "WEXT: Interface up");
666 drv->if_disabled = 0;
667 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED,
668 NULL);
669 }
670 }
671
672 /*
673 * Some drivers send the association event before the operup event--in
674 * this case, lifting operstate in wpa_driver_wext_set_operstate()
675 * fails. This will hit us when wpa_supplicant does not need to do
676 * IEEE 802.1X authentication
677 */
678 if (drv->operstate == 1 &&
679 (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
680 !(ifi->ifi_flags & IFF_RUNNING))
681 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
682 -1, IF_OPER_UP);
683
684 attrlen = len;
685 attr = (struct rtattr *) buf;
686
687 rta_len = RTA_ALIGN(sizeof(struct rtattr));
688 while (RTA_OK(attr, attrlen)) {
689 if (attr->rta_type == IFLA_WIRELESS) {
690 wpa_driver_wext_event_wireless(
691 drv, ((char *) attr) + rta_len,
692 attr->rta_len - rta_len);
693 } else if (attr->rta_type == IFLA_IFNAME) {
694 wpa_driver_wext_event_link(drv,
695 ((char *) attr) + rta_len,
696 attr->rta_len - rta_len, 0);
697 }
698 attr = RTA_NEXT(attr, attrlen);
699 }
700 }
701
702
wpa_driver_wext_event_rtm_dellink(void * ctx,struct ifinfomsg * ifi,u8 * buf,size_t len)703 static void wpa_driver_wext_event_rtm_dellink(void *ctx, struct ifinfomsg *ifi,
704 u8 *buf, size_t len)
705 {
706 struct wpa_driver_wext_data *drv = ctx;
707 int attrlen, rta_len;
708 struct rtattr *attr;
709
710 attrlen = len;
711 attr = (struct rtattr *) buf;
712
713 rta_len = RTA_ALIGN(sizeof(struct rtattr));
714 while (RTA_OK(attr, attrlen)) {
715 if (attr->rta_type == IFLA_IFNAME) {
716 wpa_driver_wext_event_link(drv,
717 ((char *) attr) + rta_len,
718 attr->rta_len - rta_len, 1);
719 }
720 attr = RTA_NEXT(attr, attrlen);
721 }
722 }
723
724
wpa_driver_wext_rfkill_blocked(void * ctx)725 static void wpa_driver_wext_rfkill_blocked(void *ctx)
726 {
727 wpa_printf(MSG_DEBUG, "WEXT: RFKILL blocked");
728 /*
729 * This may be for any interface; use ifdown event to disable
730 * interface.
731 */
732 }
733
734
wpa_driver_wext_rfkill_unblocked(void * ctx)735 static void wpa_driver_wext_rfkill_unblocked(void *ctx)
736 {
737 struct wpa_driver_wext_data *drv = ctx;
738 wpa_printf(MSG_DEBUG, "WEXT: RFKILL unblocked");
739 if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1)) {
740 wpa_printf(MSG_DEBUG, "WEXT: Could not set interface UP "
741 "after rfkill unblock");
742 return;
743 }
744 /* rtnetlink ifup handler will report interface as enabled */
745 }
746
747
wext_get_phy_name(struct wpa_driver_wext_data * drv)748 static void wext_get_phy_name(struct wpa_driver_wext_data *drv)
749 {
750 /* Find phy (radio) to which this interface belongs */
751 char buf[90], *pos;
752 int f, rv;
753
754 drv->phyname[0] = '\0';
755 snprintf(buf, sizeof(buf) - 1, "/sys/class/net/%s/phy80211/name",
756 drv->ifname);
757 f = open(buf, O_RDONLY);
758 if (f < 0) {
759 wpa_printf(MSG_DEBUG, "Could not open file %s: %s",
760 buf, strerror(errno));
761 return;
762 }
763
764 rv = read(f, drv->phyname, sizeof(drv->phyname) - 1);
765 close(f);
766 if (rv < 0) {
767 wpa_printf(MSG_DEBUG, "Could not read file %s: %s",
768 buf, strerror(errno));
769 return;
770 }
771
772 drv->phyname[rv] = '\0';
773 pos = os_strchr(drv->phyname, '\n');
774 if (pos)
775 *pos = '\0';
776 wpa_printf(MSG_DEBUG, "wext: interface %s phy: %s",
777 drv->ifname, drv->phyname);
778 }
779
780
781 /**
782 * wpa_driver_wext_init - Initialize WE driver interface
783 * @ctx: context to be used when calling wpa_supplicant functions,
784 * e.g., wpa_supplicant_event()
785 * @ifname: interface name, e.g., wlan0
786 * Returns: Pointer to private data, %NULL on failure
787 */
wpa_driver_wext_init(void * ctx,const char * ifname)788 void * wpa_driver_wext_init(void *ctx, const char *ifname)
789 {
790 struct wpa_driver_wext_data *drv;
791 struct netlink_config *cfg;
792 struct rfkill_config *rcfg;
793 char path[128];
794 struct stat buf;
795
796 drv = os_zalloc(sizeof(*drv));
797 if (drv == NULL)
798 return NULL;
799 drv->ctx = ctx;
800 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
801
802 os_snprintf(path, sizeof(path), "/sys/class/net/%s/phy80211", ifname);
803 if (stat(path, &buf) == 0) {
804 wpa_printf(MSG_DEBUG, "WEXT: cfg80211-based driver detected");
805 drv->cfg80211 = 1;
806 wext_get_phy_name(drv);
807 }
808
809 drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
810 if (drv->ioctl_sock < 0) {
811 wpa_printf(MSG_ERROR, "socket(PF_INET,SOCK_DGRAM): %s",
812 strerror(errno));
813 goto err1;
814 }
815
816 cfg = os_zalloc(sizeof(*cfg));
817 if (cfg == NULL)
818 goto err1;
819 cfg->ctx = drv;
820 cfg->newlink_cb = wpa_driver_wext_event_rtm_newlink;
821 cfg->dellink_cb = wpa_driver_wext_event_rtm_dellink;
822 drv->netlink = netlink_init(cfg);
823 if (drv->netlink == NULL) {
824 os_free(cfg);
825 goto err2;
826 }
827
828 rcfg = os_zalloc(sizeof(*rcfg));
829 if (rcfg == NULL)
830 goto err3;
831 rcfg->ctx = drv;
832 os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
833 rcfg->blocked_cb = wpa_driver_wext_rfkill_blocked;
834 rcfg->unblocked_cb = wpa_driver_wext_rfkill_unblocked;
835 drv->rfkill = rfkill_init(rcfg);
836 if (drv->rfkill == NULL) {
837 wpa_printf(MSG_DEBUG, "WEXT: RFKILL status not available");
838 os_free(rcfg);
839 }
840
841 drv->mlme_sock = -1;
842
843 if (wpa_driver_wext_finish_drv_init(drv) < 0)
844 goto err3;
845
846 wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 1);
847
848 return drv;
849
850 err3:
851 rfkill_deinit(drv->rfkill);
852 netlink_deinit(drv->netlink);
853 err2:
854 close(drv->ioctl_sock);
855 err1:
856 os_free(drv);
857 return NULL;
858 }
859
860
wpa_driver_wext_send_rfkill(void * eloop_ctx,void * timeout_ctx)861 static void wpa_driver_wext_send_rfkill(void *eloop_ctx, void *timeout_ctx)
862 {
863 wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
864 }
865
866
wext_hostap_ifname(struct wpa_driver_wext_data * drv,const char * ifname)867 static int wext_hostap_ifname(struct wpa_driver_wext_data *drv,
868 const char *ifname)
869 {
870 char buf[200], *res;
871 int type, ret;
872 FILE *f;
873
874 if (strcmp(ifname, ".") == 0 || strcmp(ifname, "..") == 0)
875 return -1;
876
877 ret = snprintf(buf, sizeof(buf), "/sys/class/net/%s/device/net/%s/type",
878 drv->ifname, ifname);
879 if (os_snprintf_error(sizeof(buf), ret))
880 return -1;
881
882 f = fopen(buf, "r");
883 if (!f)
884 return -1;
885 res = fgets(buf, sizeof(buf), f);
886 fclose(f);
887
888 type = res ? atoi(res) : -1;
889 wpa_printf(MSG_DEBUG, "WEXT: hostap ifname %s type %d", ifname, type);
890
891 if (type == ARPHRD_IEEE80211) {
892 wpa_printf(MSG_DEBUG,
893 "WEXT: Found hostap driver wifi# interface (%s)",
894 ifname);
895 wpa_driver_wext_alternative_ifindex(drv, ifname);
896 return 0;
897 }
898 return -1;
899 }
900
901
wext_add_hostap(struct wpa_driver_wext_data * drv)902 static int wext_add_hostap(struct wpa_driver_wext_data *drv)
903 {
904 char buf[200];
905 int n;
906 struct dirent **names;
907 int ret = -1;
908
909 snprintf(buf, sizeof(buf), "/sys/class/net/%s/device/net", drv->ifname);
910 n = scandir(buf, &names, NULL, alphasort);
911 if (n < 0)
912 return -1;
913
914 while (n--) {
915 if (ret < 0 && wext_hostap_ifname(drv, names[n]->d_name) == 0)
916 ret = 0;
917 free(names[n]);
918 }
919 free(names);
920
921 return ret;
922 }
923
924
wext_check_hostap(struct wpa_driver_wext_data * drv)925 static void wext_check_hostap(struct wpa_driver_wext_data *drv)
926 {
927 char path[200], buf[200], *pos;
928 ssize_t res;
929
930 /*
931 * Host AP driver may use both wlan# and wifi# interface in wireless
932 * events. Since some of the versions included WE-18 support, let's add
933 * the alternative ifindex also from driver_wext.c for the time being.
934 * This may be removed at some point once it is believed that old
935 * versions of the driver are not in use anymore. However, it looks like
936 * the wifi# interface is still used in the current kernel tree, so it
937 * may not really be possible to remove this before the Host AP driver
938 * gets removed from the kernel.
939 */
940
941 /* First, try to see if driver information is available from sysfs */
942 snprintf(path, sizeof(path), "/sys/class/net/%s/device/driver",
943 drv->ifname);
944 res = readlink(path, buf, sizeof(buf) - 1);
945 if (res > 0) {
946 buf[res] = '\0';
947 pos = strrchr(buf, '/');
948 if (pos)
949 pos++;
950 else
951 pos = buf;
952 wpa_printf(MSG_DEBUG, "WEXT: Driver: %s", pos);
953 if (os_strncmp(pos, "hostap", 6) == 0 &&
954 wext_add_hostap(drv) == 0)
955 return;
956 }
957
958 /* Second, use the old design with hardcoded ifname */
959 if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
960 char ifname2[IFNAMSIZ + 1];
961 os_strlcpy(ifname2, drv->ifname, sizeof(ifname2));
962 os_memcpy(ifname2, "wifi", 4);
963 wpa_driver_wext_alternative_ifindex(drv, ifname2);
964 }
965 }
966
967
wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data * drv)968 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
969 {
970 int send_rfkill_event = 0;
971
972 if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1) < 0) {
973 if (rfkill_is_blocked(drv->rfkill)) {
974 wpa_printf(MSG_DEBUG, "WEXT: Could not yet enable "
975 "interface '%s' due to rfkill",
976 drv->ifname);
977 drv->if_disabled = 1;
978 send_rfkill_event = 1;
979 } else {
980 wpa_printf(MSG_ERROR, "WEXT: Could not set "
981 "interface '%s' UP", drv->ifname);
982 return -1;
983 }
984 }
985
986 /*
987 * Make sure that the driver does not have any obsolete PMKID entries.
988 */
989 wpa_driver_wext_flush_pmkid(drv);
990
991 if (wpa_driver_wext_set_mode(drv, 0) < 0) {
992 wpa_printf(MSG_DEBUG, "Could not configure driver to use "
993 "managed mode");
994 /* Try to use it anyway */
995 }
996
997 wpa_driver_wext_get_range(drv);
998
999 /*
1000 * Unlock the driver's BSSID and force to a random SSID to clear any
1001 * previous association the driver might have when the supplicant
1002 * starts up.
1003 */
1004 wpa_driver_wext_disconnect(drv);
1005
1006 drv->ifindex = if_nametoindex(drv->ifname);
1007
1008 wext_check_hostap(drv);
1009
1010 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1011 1, IF_OPER_DORMANT);
1012
1013 if (send_rfkill_event) {
1014 eloop_register_timeout(0, 0, wpa_driver_wext_send_rfkill,
1015 drv, drv->ctx);
1016 }
1017
1018 return 0;
1019 }
1020
1021
1022 /**
1023 * wpa_driver_wext_deinit - Deinitialize WE driver interface
1024 * @priv: Pointer to private wext data from wpa_driver_wext_init()
1025 *
1026 * Shut down driver interface and processing of driver events. Free
1027 * private data buffer if one was allocated in wpa_driver_wext_init().
1028 */
wpa_driver_wext_deinit(void * priv)1029 void wpa_driver_wext_deinit(void *priv)
1030 {
1031 struct wpa_driver_wext_data *drv = priv;
1032
1033 wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 0);
1034
1035 eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1036 eloop_cancel_timeout(wpa_driver_wext_send_rfkill, drv, drv->ctx);
1037
1038 /*
1039 * Clear possibly configured driver parameters in order to make it
1040 * easier to use the driver after wpa_supplicant has been terminated.
1041 */
1042 wpa_driver_wext_disconnect(drv);
1043
1044 netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1045 netlink_deinit(drv->netlink);
1046 rfkill_deinit(drv->rfkill);
1047
1048 if (drv->mlme_sock >= 0)
1049 eloop_unregister_read_sock(drv->mlme_sock);
1050
1051 (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0);
1052
1053 close(drv->ioctl_sock);
1054 if (drv->mlme_sock >= 0)
1055 close(drv->mlme_sock);
1056 os_free(drv->assoc_req_ies);
1057 os_free(drv->assoc_resp_ies);
1058 os_free(drv);
1059 }
1060
1061
1062 /**
1063 * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
1064 * @eloop_ctx: Unused
1065 * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
1066 *
1067 * This function can be used as registered timeout when starting a scan to
1068 * generate a scan completed event if the driver does not report this.
1069 */
wpa_driver_wext_scan_timeout(void * eloop_ctx,void * timeout_ctx)1070 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1071 {
1072 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1073 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1074 }
1075
1076
1077 /**
1078 * wpa_driver_wext_scan - Request the driver to initiate scan
1079 * @priv: Pointer to private wext data from wpa_driver_wext_init()
1080 * @param: Scan parameters (specific SSID to scan for (ProbeReq), etc.)
1081 * Returns: 0 on success, -1 on failure
1082 */
wpa_driver_wext_scan(void * priv,struct wpa_driver_scan_params * params)1083 int wpa_driver_wext_scan(void *priv, struct wpa_driver_scan_params *params)
1084 {
1085 struct wpa_driver_wext_data *drv = priv;
1086 struct iwreq iwr;
1087 int ret = 0, timeout;
1088 struct iw_scan_req req;
1089 const u8 *ssid = params->ssids[0].ssid;
1090 size_t ssid_len = params->ssids[0].ssid_len;
1091
1092 if (ssid_len > IW_ESSID_MAX_SIZE) {
1093 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1094 __FUNCTION__, (unsigned long) ssid_len);
1095 return -1;
1096 }
1097
1098 os_memset(&iwr, 0, sizeof(iwr));
1099 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1100
1101 if (ssid && ssid_len) {
1102 os_memset(&req, 0, sizeof(req));
1103 req.essid_len = ssid_len;
1104 req.bssid.sa_family = ARPHRD_ETHER;
1105 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1106 os_memcpy(req.essid, ssid, ssid_len);
1107 iwr.u.data.pointer = (caddr_t) &req;
1108 iwr.u.data.length = sizeof(req);
1109 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1110 }
1111
1112 if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1113 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWSCAN]: %s",
1114 strerror(errno));
1115 ret = -1;
1116 }
1117
1118 /* Not all drivers generate "scan completed" wireless event, so try to
1119 * read results after a timeout. */
1120 timeout = 10;
1121 if (drv->scan_complete_events) {
1122 /*
1123 * The driver seems to deliver SIOCGIWSCAN events to notify
1124 * when scan is complete, so use longer timeout to avoid race
1125 * conditions with scanning and following association request.
1126 */
1127 timeout = 30;
1128 }
1129 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1130 "seconds", ret, timeout);
1131 eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1132 eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
1133 drv->ctx);
1134
1135 return ret;
1136 }
1137
1138
wpa_driver_wext_giwscan(struct wpa_driver_wext_data * drv,size_t * len)1139 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
1140 size_t *len)
1141 {
1142 struct iwreq iwr;
1143 u8 *res_buf;
1144 size_t res_buf_len;
1145
1146 res_buf_len = IW_SCAN_MAX_DATA;
1147 for (;;) {
1148 res_buf = os_malloc(res_buf_len);
1149 if (res_buf == NULL)
1150 return NULL;
1151 os_memset(&iwr, 0, sizeof(iwr));
1152 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1153 iwr.u.data.pointer = res_buf;
1154 iwr.u.data.length = res_buf_len;
1155
1156 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1157 break;
1158
1159 if (errno == E2BIG && res_buf_len < 65535) {
1160 os_free(res_buf);
1161 res_buf = NULL;
1162 res_buf_len *= 2;
1163 if (res_buf_len > 65535)
1164 res_buf_len = 65535; /* 16-bit length field */
1165 wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1166 "trying larger buffer (%lu bytes)",
1167 (unsigned long) res_buf_len);
1168 } else {
1169 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWSCAN]: %s",
1170 strerror(errno));
1171 os_free(res_buf);
1172 return NULL;
1173 }
1174 }
1175
1176 if (iwr.u.data.length > res_buf_len) {
1177 os_free(res_buf);
1178 return NULL;
1179 }
1180 *len = iwr.u.data.length;
1181
1182 return res_buf;
1183 }
1184
1185
1186 /*
1187 * Data structure for collecting WEXT scan results. This is needed to allow
1188 * the various methods of reporting IEs to be combined into a single IE buffer.
1189 */
1190 struct wext_scan_data {
1191 struct wpa_scan_res res;
1192 u8 *ie;
1193 size_t ie_len;
1194 u8 ssid[SSID_MAX_LEN];
1195 size_t ssid_len;
1196 int maxrate;
1197 };
1198
1199
wext_get_scan_mode(struct iw_event * iwe,struct wext_scan_data * res)1200 static void wext_get_scan_mode(struct iw_event *iwe,
1201 struct wext_scan_data *res)
1202 {
1203 if (iwe->u.mode == IW_MODE_ADHOC)
1204 res->res.caps |= IEEE80211_CAP_IBSS;
1205 else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1206 res->res.caps |= IEEE80211_CAP_ESS;
1207 }
1208
1209
wext_get_scan_ssid(struct iw_event * iwe,struct wext_scan_data * res,char * custom,char * end)1210 static void wext_get_scan_ssid(struct iw_event *iwe,
1211 struct wext_scan_data *res, char *custom,
1212 char *end)
1213 {
1214 int ssid_len = iwe->u.essid.length;
1215 if (ssid_len > end - custom)
1216 return;
1217 if (iwe->u.essid.flags &&
1218 ssid_len > 0 &&
1219 ssid_len <= IW_ESSID_MAX_SIZE) {
1220 os_memcpy(res->ssid, custom, ssid_len);
1221 res->ssid_len = ssid_len;
1222 }
1223 }
1224
1225
wext_get_scan_freq(struct iw_event * iwe,struct wext_scan_data * res)1226 static void wext_get_scan_freq(struct iw_event *iwe,
1227 struct wext_scan_data *res)
1228 {
1229 int divi = 1000000, i;
1230
1231 if (iwe->u.freq.e == 0) {
1232 /*
1233 * Some drivers do not report frequency, but a channel.
1234 * Try to map this to frequency by assuming they are using
1235 * IEEE 802.11b/g. But don't overwrite a previously parsed
1236 * frequency if the driver sends both frequency and channel,
1237 * since the driver may be sending an A-band channel that we
1238 * don't handle here.
1239 */
1240
1241 if (res->res.freq)
1242 return;
1243
1244 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1245 res->res.freq = 2407 + 5 * iwe->u.freq.m;
1246 return;
1247 } else if (iwe->u.freq.m == 14) {
1248 res->res.freq = 2484;
1249 return;
1250 }
1251 }
1252
1253 if (iwe->u.freq.e > 6) {
1254 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1255 MACSTR " m=%d e=%d)",
1256 MAC2STR(res->res.bssid), iwe->u.freq.m,
1257 iwe->u.freq.e);
1258 return;
1259 }
1260
1261 for (i = 0; i < iwe->u.freq.e; i++)
1262 divi /= 10;
1263 res->res.freq = iwe->u.freq.m / divi;
1264 }
1265
1266
wext_get_scan_qual(struct wpa_driver_wext_data * drv,struct iw_event * iwe,struct wext_scan_data * res)1267 static void wext_get_scan_qual(struct wpa_driver_wext_data *drv,
1268 struct iw_event *iwe,
1269 struct wext_scan_data *res)
1270 {
1271 res->res.qual = iwe->u.qual.qual;
1272 res->res.noise = iwe->u.qual.noise;
1273 res->res.level = iwe->u.qual.level;
1274 if (iwe->u.qual.updated & IW_QUAL_QUAL_INVALID)
1275 res->res.flags |= WPA_SCAN_QUAL_INVALID;
1276 if (iwe->u.qual.updated & IW_QUAL_LEVEL_INVALID)
1277 res->res.flags |= WPA_SCAN_LEVEL_INVALID;
1278 if (iwe->u.qual.updated & IW_QUAL_NOISE_INVALID)
1279 res->res.flags |= WPA_SCAN_NOISE_INVALID;
1280 if (iwe->u.qual.updated & IW_QUAL_DBM)
1281 res->res.flags |= WPA_SCAN_LEVEL_DBM;
1282 if ((iwe->u.qual.updated & IW_QUAL_DBM) ||
1283 ((iwe->u.qual.level != 0) &&
1284 (iwe->u.qual.level > drv->max_level))) {
1285 if (iwe->u.qual.level >= 64)
1286 res->res.level -= 0x100;
1287 if (iwe->u.qual.noise >= 64)
1288 res->res.noise -= 0x100;
1289 }
1290 }
1291
1292
wext_get_scan_encode(struct iw_event * iwe,struct wext_scan_data * res)1293 static void wext_get_scan_encode(struct iw_event *iwe,
1294 struct wext_scan_data *res)
1295 {
1296 if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1297 res->res.caps |= IEEE80211_CAP_PRIVACY;
1298 }
1299
1300
wext_get_scan_rate(struct iw_event * iwe,struct wext_scan_data * res,char * pos,char * end)1301 static void wext_get_scan_rate(struct iw_event *iwe,
1302 struct wext_scan_data *res, char *pos,
1303 char *end)
1304 {
1305 int maxrate;
1306 char *custom = pos + IW_EV_LCP_LEN;
1307 struct iw_param p;
1308 size_t clen;
1309
1310 clen = iwe->len;
1311 if (clen > (size_t) (end - custom))
1312 return;
1313 maxrate = 0;
1314 while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1315 /* Note: may be misaligned, make a local, aligned copy */
1316 os_memcpy(&p, custom, sizeof(struct iw_param));
1317 if (p.value > maxrate)
1318 maxrate = p.value;
1319 clen -= sizeof(struct iw_param);
1320 custom += sizeof(struct iw_param);
1321 }
1322
1323 /* Convert the maxrate from WE-style (b/s units) to
1324 * 802.11 rates (500000 b/s units).
1325 */
1326 res->maxrate = maxrate / 500000;
1327 }
1328
1329
wext_get_scan_iwevgenie(struct iw_event * iwe,struct wext_scan_data * res,char * custom,char * end)1330 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1331 struct wext_scan_data *res, char *custom,
1332 char *end)
1333 {
1334 char *genie, *gpos, *gend;
1335 u8 *tmp;
1336
1337 if (iwe->u.data.length == 0)
1338 return;
1339
1340 gpos = genie = custom;
1341 gend = genie + iwe->u.data.length;
1342 if (gend > end) {
1343 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1344 return;
1345 }
1346
1347 tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1348 if (tmp == NULL)
1349 return;
1350 os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1351 res->ie = tmp;
1352 res->ie_len += gend - gpos;
1353 }
1354
1355
wext_get_scan_custom(struct iw_event * iwe,struct wext_scan_data * res,char * custom,char * end)1356 static void wext_get_scan_custom(struct iw_event *iwe,
1357 struct wext_scan_data *res, char *custom,
1358 char *end)
1359 {
1360 size_t clen;
1361 u8 *tmp;
1362
1363 clen = iwe->u.data.length;
1364 if (clen > (size_t) (end - custom))
1365 return;
1366
1367 if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1368 char *spos;
1369 int bytes;
1370 spos = custom + 7;
1371 bytes = custom + clen - spos;
1372 if (bytes & 1 || bytes == 0)
1373 return;
1374 bytes /= 2;
1375 tmp = os_realloc(res->ie, res->ie_len + bytes);
1376 if (tmp == NULL)
1377 return;
1378 res->ie = tmp;
1379 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1380 return;
1381 res->ie_len += bytes;
1382 } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1383 char *spos;
1384 int bytes;
1385 spos = custom + 7;
1386 bytes = custom + clen - spos;
1387 if (bytes & 1 || bytes == 0)
1388 return;
1389 bytes /= 2;
1390 tmp = os_realloc(res->ie, res->ie_len + bytes);
1391 if (tmp == NULL)
1392 return;
1393 res->ie = tmp;
1394 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1395 return;
1396 res->ie_len += bytes;
1397 } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1398 char *spos;
1399 int bytes;
1400 u8 bin[8];
1401 spos = custom + 4;
1402 bytes = custom + clen - spos;
1403 if (bytes != 16) {
1404 wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1405 return;
1406 }
1407 bytes /= 2;
1408 if (hexstr2bin(spos, bin, bytes) < 0) {
1409 wpa_printf(MSG_DEBUG, "WEXT: Invalid TSF value");
1410 return;
1411 }
1412 res->res.tsf += WPA_GET_BE64(bin);
1413 }
1414 }
1415
1416
wext_19_iw_point(struct wpa_driver_wext_data * drv,u16 cmd)1417 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1418 {
1419 return drv->we_version_compiled > 18 &&
1420 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1421 cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1422 }
1423
1424
wpa_driver_wext_add_scan_entry(struct wpa_scan_results * res,struct wext_scan_data * data)1425 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1426 struct wext_scan_data *data)
1427 {
1428 struct wpa_scan_res **tmp;
1429 struct wpa_scan_res *r;
1430 size_t extra_len;
1431 u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1432
1433 /* Figure out whether we need to fake any IEs */
1434 pos = data->ie;
1435 end = pos + data->ie_len;
1436 while (pos && end - pos > 1) {
1437 if (2 + pos[1] > end - pos)
1438 break;
1439 if (pos[0] == WLAN_EID_SSID)
1440 ssid_ie = pos;
1441 else if (pos[0] == WLAN_EID_SUPP_RATES)
1442 rate_ie = pos;
1443 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1444 rate_ie = pos;
1445 pos += 2 + pos[1];
1446 }
1447
1448 extra_len = 0;
1449 if (ssid_ie == NULL)
1450 extra_len += 2 + data->ssid_len;
1451 if (rate_ie == NULL && data->maxrate)
1452 extra_len += 3;
1453
1454 r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1455 if (r == NULL)
1456 return;
1457 os_memcpy(r, &data->res, sizeof(*r));
1458 r->ie_len = extra_len + data->ie_len;
1459 pos = (u8 *) (r + 1);
1460 if (ssid_ie == NULL) {
1461 /*
1462 * Generate a fake SSID IE since the driver did not report
1463 * a full IE list.
1464 */
1465 *pos++ = WLAN_EID_SSID;
1466 *pos++ = data->ssid_len;
1467 os_memcpy(pos, data->ssid, data->ssid_len);
1468 pos += data->ssid_len;
1469 }
1470 if (rate_ie == NULL && data->maxrate) {
1471 /*
1472 * Generate a fake Supported Rates IE since the driver did not
1473 * report a full IE list.
1474 */
1475 *pos++ = WLAN_EID_SUPP_RATES;
1476 *pos++ = 1;
1477 *pos++ = data->maxrate;
1478 }
1479 if (data->ie)
1480 os_memcpy(pos, data->ie, data->ie_len);
1481
1482 tmp = os_realloc_array(res->res, res->num + 1,
1483 sizeof(struct wpa_scan_res *));
1484 if (tmp == NULL) {
1485 os_free(r);
1486 return;
1487 }
1488 tmp[res->num++] = r;
1489 res->res = tmp;
1490 }
1491
1492
1493 /**
1494 * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1495 * @priv: Pointer to private wext data from wpa_driver_wext_init()
1496 * Returns: Scan results on success, -1 on failure
1497 */
wpa_driver_wext_get_scan_results(void * priv)1498 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1499 {
1500 struct wpa_driver_wext_data *drv = priv;
1501 size_t len;
1502 int first;
1503 u8 *res_buf;
1504 struct iw_event iwe_buf, *iwe = &iwe_buf;
1505 char *pos, *end, *custom;
1506 struct wpa_scan_results *res;
1507 struct wext_scan_data data;
1508
1509 res_buf = wpa_driver_wext_giwscan(drv, &len);
1510 if (res_buf == NULL)
1511 return NULL;
1512
1513 first = 1;
1514
1515 res = os_zalloc(sizeof(*res));
1516 if (res == NULL) {
1517 os_free(res_buf);
1518 return NULL;
1519 }
1520
1521 pos = (char *) res_buf;
1522 end = (char *) res_buf + len;
1523 os_memset(&data, 0, sizeof(data));
1524
1525 while ((size_t) (end - pos) >= IW_EV_LCP_LEN) {
1526 /* Event data may be unaligned, so make a local, aligned copy
1527 * before processing. */
1528 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1529 if (iwe->len <= IW_EV_LCP_LEN || iwe->len > end - pos)
1530 break;
1531
1532 custom = pos + IW_EV_POINT_LEN;
1533 if (wext_19_iw_point(drv, iwe->cmd)) {
1534 /* WE-19 removed the pointer from struct iw_point */
1535 char *dpos = (char *) &iwe_buf.u.data.length;
1536 int dlen = dpos - (char *) &iwe_buf;
1537 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1538 sizeof(struct iw_event) - dlen);
1539 } else {
1540 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1541 custom += IW_EV_POINT_OFF;
1542 }
1543
1544 switch (iwe->cmd) {
1545 case SIOCGIWAP:
1546 if (!first)
1547 wpa_driver_wext_add_scan_entry(res, &data);
1548 first = 0;
1549 os_free(data.ie);
1550 os_memset(&data, 0, sizeof(data));
1551 os_memcpy(data.res.bssid,
1552 iwe->u.ap_addr.sa_data, ETH_ALEN);
1553 break;
1554 case SIOCGIWMODE:
1555 wext_get_scan_mode(iwe, &data);
1556 break;
1557 case SIOCGIWESSID:
1558 wext_get_scan_ssid(iwe, &data, custom, end);
1559 break;
1560 case SIOCGIWFREQ:
1561 wext_get_scan_freq(iwe, &data);
1562 break;
1563 case IWEVQUAL:
1564 wext_get_scan_qual(drv, iwe, &data);
1565 break;
1566 case SIOCGIWENCODE:
1567 wext_get_scan_encode(iwe, &data);
1568 break;
1569 case SIOCGIWRATE:
1570 wext_get_scan_rate(iwe, &data, pos, end);
1571 break;
1572 case IWEVGENIE:
1573 wext_get_scan_iwevgenie(iwe, &data, custom, end);
1574 break;
1575 case IWEVCUSTOM:
1576 wext_get_scan_custom(iwe, &data, custom, end);
1577 break;
1578 }
1579
1580 pos += iwe->len;
1581 }
1582 os_free(res_buf);
1583 res_buf = NULL;
1584 if (!first)
1585 wpa_driver_wext_add_scan_entry(res, &data);
1586 os_free(data.ie);
1587
1588 wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1589 (unsigned long) len, (unsigned long) res->num);
1590
1591 return res;
1592 }
1593
1594
wpa_driver_wext_get_range(void * priv)1595 static int wpa_driver_wext_get_range(void *priv)
1596 {
1597 struct wpa_driver_wext_data *drv = priv;
1598 struct iw_range *range;
1599 struct iwreq iwr;
1600 int minlen;
1601 size_t buflen;
1602
1603 /*
1604 * Use larger buffer than struct iw_range in order to allow the
1605 * structure to grow in the future.
1606 */
1607 buflen = sizeof(struct iw_range) + 500;
1608 range = os_zalloc(buflen);
1609 if (range == NULL)
1610 return -1;
1611
1612 os_memset(&iwr, 0, sizeof(iwr));
1613 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1614 iwr.u.data.pointer = (caddr_t) range;
1615 iwr.u.data.length = buflen;
1616
1617 minlen = ((char *) &range->enc_capa) - (char *) range +
1618 sizeof(range->enc_capa);
1619
1620 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1621 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWRANGE]: %s",
1622 strerror(errno));
1623 os_free(range);
1624 return -1;
1625 } else if (iwr.u.data.length >= minlen &&
1626 range->we_version_compiled >= 18) {
1627 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1628 "WE(source)=%d enc_capa=0x%x",
1629 range->we_version_compiled,
1630 range->we_version_source,
1631 range->enc_capa);
1632 drv->has_capability = 1;
1633 drv->we_version_compiled = range->we_version_compiled;
1634 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1635 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1636 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1637 }
1638 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1639 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1640 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1641 }
1642 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1643 WPA_DRIVER_CAPA_ENC_WEP104;
1644 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP128;
1645 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1646 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1647 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1648 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1649 if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
1650 drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE_PSK |
1651 WPA_DRIVER_FLAGS_4WAY_HANDSHAKE_8021X;
1652 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1653 WPA_DRIVER_AUTH_SHARED |
1654 WPA_DRIVER_AUTH_LEAP;
1655 drv->capa.max_scan_ssids = 1;
1656
1657 wpa_printf(MSG_DEBUG, " capabilities: key_mgmt 0x%x enc 0x%x "
1658 "flags 0x%llx",
1659 drv->capa.key_mgmt, drv->capa.enc,
1660 (unsigned long long) drv->capa.flags);
1661 } else {
1662 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1663 "assuming WPA is not supported");
1664 }
1665
1666 drv->max_level = range->max_qual.level;
1667
1668 os_free(range);
1669 return 0;
1670 }
1671
1672
wpa_driver_wext_set_psk(struct wpa_driver_wext_data * drv,const u8 * psk)1673 static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
1674 const u8 *psk)
1675 {
1676 struct iw_encode_ext *ext;
1677 struct iwreq iwr;
1678 int ret;
1679
1680 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1681
1682 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE_8021X))
1683 return 0;
1684
1685 if (!psk)
1686 return 0;
1687
1688 os_memset(&iwr, 0, sizeof(iwr));
1689 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1690
1691 ext = os_zalloc(sizeof(*ext) + PMK_LEN);
1692 if (ext == NULL)
1693 return -1;
1694
1695 iwr.u.encoding.pointer = (caddr_t) ext;
1696 iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
1697 ext->key_len = PMK_LEN;
1698 os_memcpy(&ext->key, psk, ext->key_len);
1699 ext->alg = IW_ENCODE_ALG_PMK;
1700
1701 ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
1702 if (ret < 0)
1703 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODEEXT] PMK: %s",
1704 strerror(errno));
1705 os_free(ext);
1706
1707 return ret;
1708 }
1709
1710
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)1711 static int wpa_driver_wext_set_key_ext(void *priv, enum wpa_alg alg,
1712 const u8 *addr, int key_idx,
1713 int set_tx, const u8 *seq,
1714 size_t seq_len,
1715 const u8 *key, size_t key_len)
1716 {
1717 struct wpa_driver_wext_data *drv = priv;
1718 struct iwreq iwr;
1719 int ret = 0;
1720 struct iw_encode_ext *ext;
1721
1722 if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1723 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1724 __FUNCTION__, (unsigned long) seq_len);
1725 return -1;
1726 }
1727
1728 ext = os_zalloc(sizeof(*ext) + key_len);
1729 if (ext == NULL)
1730 return -1;
1731 os_memset(&iwr, 0, sizeof(iwr));
1732 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1733 iwr.u.encoding.flags = key_idx + 1;
1734 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1735 if (alg == WPA_ALG_NONE)
1736 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1737 iwr.u.encoding.pointer = (caddr_t) ext;
1738 iwr.u.encoding.length = sizeof(*ext) + key_len;
1739
1740 if (addr == NULL || is_broadcast_ether_addr(addr))
1741 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1742 if (set_tx)
1743 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1744
1745 ext->addr.sa_family = ARPHRD_ETHER;
1746 if (addr)
1747 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1748 else
1749 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1750 if (key && key_len) {
1751 os_memcpy(ext + 1, key, key_len);
1752 ext->key_len = key_len;
1753 }
1754 switch (alg) {
1755 case WPA_ALG_NONE:
1756 ext->alg = IW_ENCODE_ALG_NONE;
1757 break;
1758 case WPA_ALG_WEP:
1759 ext->alg = IW_ENCODE_ALG_WEP;
1760 break;
1761 case WPA_ALG_TKIP:
1762 ext->alg = IW_ENCODE_ALG_TKIP;
1763 break;
1764 case WPA_ALG_CCMP:
1765 ext->alg = IW_ENCODE_ALG_CCMP;
1766 break;
1767 case WPA_ALG_PMK:
1768 ext->alg = IW_ENCODE_ALG_PMK;
1769 break;
1770 #ifdef CONFIG_IEEE80211W
1771 case WPA_ALG_IGTK:
1772 ext->alg = IW_ENCODE_ALG_AES_CMAC;
1773 break;
1774 #endif /* CONFIG_IEEE80211W */
1775 default:
1776 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1777 __FUNCTION__, alg);
1778 os_free(ext);
1779 return -1;
1780 }
1781
1782 if (seq && seq_len) {
1783 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1784 os_memcpy(ext->rx_seq, seq, seq_len);
1785 }
1786
1787 if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1788 ret = errno == EOPNOTSUPP ? -2 : -1;
1789 if (errno == ENODEV) {
1790 /*
1791 * ndiswrapper seems to be returning incorrect error
1792 * code.. */
1793 ret = -2;
1794 }
1795
1796 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODEEXT]: %s",
1797 strerror(errno));
1798 }
1799
1800 os_free(ext);
1801 return ret;
1802 }
1803
1804
1805 /**
1806 * wpa_driver_wext_set_key - Configure encryption key
1807 * @priv: Pointer to private wext data from wpa_driver_wext_init()
1808 * @priv: Private driver interface data
1809 * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1810 * %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1811 * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1812 * broadcast/default keys
1813 * @key_idx: key index (0..3), usually 0 for unicast keys
1814 * @set_tx: Configure this key as the default Tx key (only used when
1815 * driver does not support separate unicast/individual key
1816 * @seq: Sequence number/packet number, seq_len octets, the next
1817 * packet number to be used for in replay protection; configured
1818 * for Rx keys (in most cases, this is only used with broadcast
1819 * keys and set to zero for unicast keys)
1820 * @seq_len: Length of the seq, depends on the algorithm:
1821 * TKIP: 6 octets, CCMP: 6 octets
1822 * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1823 * 8-byte Rx Mic Key
1824 * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1825 * TKIP: 32, CCMP: 16)
1826 * Returns: 0 on success, -1 on failure
1827 *
1828 * This function uses SIOCSIWENCODEEXT by default, but tries to use
1829 * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1830 */
wpa_driver_wext_set_key(const char * ifname,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)1831 int wpa_driver_wext_set_key(const char *ifname, void *priv, enum wpa_alg alg,
1832 const u8 *addr, int key_idx,
1833 int set_tx, const u8 *seq, size_t seq_len,
1834 const u8 *key, size_t key_len)
1835 {
1836 struct wpa_driver_wext_data *drv = priv;
1837 struct iwreq iwr;
1838 int ret = 0;
1839
1840 wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1841 "key_len=%lu",
1842 __FUNCTION__, alg, key_idx, set_tx,
1843 (unsigned long) seq_len, (unsigned long) key_len);
1844
1845 ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1846 seq, seq_len, key, key_len);
1847 if (ret == 0)
1848 return 0;
1849
1850 if (ret == -2 &&
1851 (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1852 wpa_printf(MSG_DEBUG, "Driver did not support "
1853 "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1854 ret = 0;
1855 } else {
1856 wpa_printf(MSG_DEBUG, "Driver did not support "
1857 "SIOCSIWENCODEEXT");
1858 return ret;
1859 }
1860
1861 os_memset(&iwr, 0, sizeof(iwr));
1862 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1863 iwr.u.encoding.flags = key_idx + 1;
1864 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1865 if (alg == WPA_ALG_NONE)
1866 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1867 iwr.u.encoding.pointer = (caddr_t) key;
1868 iwr.u.encoding.length = key_len;
1869
1870 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1871 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODE]: %s",
1872 strerror(errno));
1873 ret = -1;
1874 }
1875
1876 if (set_tx && alg != WPA_ALG_NONE) {
1877 os_memset(&iwr, 0, sizeof(iwr));
1878 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1879 iwr.u.encoding.flags = key_idx + 1;
1880 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1881 iwr.u.encoding.pointer = (caddr_t) NULL;
1882 iwr.u.encoding.length = 0;
1883 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1884 wpa_printf(MSG_ERROR,
1885 "ioctl[SIOCSIWENCODE] (set_tx): %s",
1886 strerror(errno));
1887 ret = -1;
1888 }
1889 }
1890
1891 return ret;
1892 }
1893
1894
wpa_driver_wext_set_countermeasures(void * priv,int enabled)1895 static int wpa_driver_wext_set_countermeasures(void *priv,
1896 int enabled)
1897 {
1898 struct wpa_driver_wext_data *drv = priv;
1899 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1900 return wpa_driver_wext_set_auth_param(drv,
1901 IW_AUTH_TKIP_COUNTERMEASURES,
1902 enabled);
1903 }
1904
1905
wpa_driver_wext_set_drop_unencrypted(void * priv,int enabled)1906 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
1907 int enabled)
1908 {
1909 struct wpa_driver_wext_data *drv = priv;
1910 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1911 drv->use_crypt = enabled;
1912 return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1913 enabled);
1914 }
1915
1916
wpa_driver_wext_mlme(struct wpa_driver_wext_data * drv,const u8 * addr,int cmd,u16 reason_code)1917 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
1918 const u8 *addr, int cmd, u16 reason_code)
1919 {
1920 struct iwreq iwr;
1921 struct iw_mlme mlme;
1922 int ret = 0;
1923
1924 os_memset(&iwr, 0, sizeof(iwr));
1925 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1926 os_memset(&mlme, 0, sizeof(mlme));
1927 mlme.cmd = cmd;
1928 mlme.reason_code = reason_code;
1929 mlme.addr.sa_family = ARPHRD_ETHER;
1930 os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1931 iwr.u.data.pointer = (caddr_t) &mlme;
1932 iwr.u.data.length = sizeof(mlme);
1933
1934 if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1935 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMLME]: %s",
1936 strerror(errno));
1937 ret = -1;
1938 }
1939
1940 return ret;
1941 }
1942
1943
wpa_driver_wext_disconnect(struct wpa_driver_wext_data * drv)1944 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv)
1945 {
1946 struct iwreq iwr;
1947 const u8 null_bssid[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
1948 u8 ssid[SSID_MAX_LEN];
1949 int i;
1950
1951 /*
1952 * Only force-disconnect when the card is in infrastructure mode,
1953 * otherwise the driver might interpret the cleared BSSID and random
1954 * SSID as an attempt to create a new ad-hoc network.
1955 */
1956 os_memset(&iwr, 0, sizeof(iwr));
1957 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1958 if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
1959 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWMODE]: %s",
1960 strerror(errno));
1961 iwr.u.mode = IW_MODE_INFRA;
1962 }
1963
1964 if (iwr.u.mode == IW_MODE_INFRA) {
1965 /* Clear the BSSID selection */
1966 if (wpa_driver_wext_set_bssid(drv, null_bssid) < 0) {
1967 wpa_printf(MSG_DEBUG, "WEXT: Failed to clear BSSID "
1968 "selection on disconnect");
1969 }
1970
1971 if (drv->cfg80211) {
1972 /*
1973 * cfg80211 supports SIOCSIWMLME commands, so there is
1974 * no need for the random SSID hack, but clear the
1975 * SSID.
1976 */
1977 if (wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) {
1978 wpa_printf(MSG_DEBUG, "WEXT: Failed to clear "
1979 "SSID on disconnect");
1980 }
1981 return;
1982 }
1983
1984 /*
1985 * Set a random SSID to make sure the driver will not be trying
1986 * to associate with something even if it does not understand
1987 * SIOCSIWMLME commands (or tries to associate automatically
1988 * after deauth/disassoc).
1989 */
1990 for (i = 0; i < SSID_MAX_LEN; i++)
1991 ssid[i] = rand() & 0xFF;
1992 if (wpa_driver_wext_set_ssid(drv, ssid, SSID_MAX_LEN) < 0) {
1993 wpa_printf(MSG_DEBUG, "WEXT: Failed to set bogus "
1994 "SSID to disconnect");
1995 }
1996 }
1997 }
1998
1999
wpa_driver_wext_deauthenticate(void * priv,const u8 * addr,u16 reason_code)2000 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
2001 u16 reason_code)
2002 {
2003 struct wpa_driver_wext_data *drv = priv;
2004 int ret;
2005 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2006 ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
2007 wpa_driver_wext_disconnect(drv);
2008 return ret;
2009 }
2010
2011
wpa_driver_wext_set_gen_ie(void * priv,const u8 * ie,size_t ie_len)2012 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
2013 size_t ie_len)
2014 {
2015 struct wpa_driver_wext_data *drv = priv;
2016 struct iwreq iwr;
2017 int ret = 0;
2018
2019 os_memset(&iwr, 0, sizeof(iwr));
2020 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2021 iwr.u.data.pointer = (caddr_t) ie;
2022 iwr.u.data.length = ie_len;
2023
2024 if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2025 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWGENIE]: %s",
2026 strerror(errno));
2027 ret = -1;
2028 }
2029
2030 return ret;
2031 }
2032
2033
wpa_driver_wext_cipher2wext(int cipher)2034 int wpa_driver_wext_cipher2wext(int cipher)
2035 {
2036 switch (cipher) {
2037 case WPA_CIPHER_NONE:
2038 return IW_AUTH_CIPHER_NONE;
2039 case WPA_CIPHER_WEP40:
2040 return IW_AUTH_CIPHER_WEP40;
2041 case WPA_CIPHER_TKIP:
2042 return IW_AUTH_CIPHER_TKIP;
2043 case WPA_CIPHER_CCMP:
2044 return IW_AUTH_CIPHER_CCMP;
2045 case WPA_CIPHER_WEP104:
2046 return IW_AUTH_CIPHER_WEP104;
2047 default:
2048 return 0;
2049 }
2050 }
2051
2052
wpa_driver_wext_keymgmt2wext(int keymgmt)2053 int wpa_driver_wext_keymgmt2wext(int keymgmt)
2054 {
2055 switch (keymgmt) {
2056 case WPA_KEY_MGMT_IEEE8021X:
2057 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
2058 return IW_AUTH_KEY_MGMT_802_1X;
2059 case WPA_KEY_MGMT_PSK:
2060 return IW_AUTH_KEY_MGMT_PSK;
2061 default:
2062 return 0;
2063 }
2064 }
2065
2066
2067 static int
wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data * drv,struct wpa_driver_associate_params * params)2068 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
2069 struct wpa_driver_associate_params *params)
2070 {
2071 struct iwreq iwr;
2072 int ret = 0;
2073
2074 wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2075 "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2076
2077 os_memset(&iwr, 0, sizeof(iwr));
2078 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2079 /* Just changing mode, not actual keys */
2080 iwr.u.encoding.flags = 0;
2081 iwr.u.encoding.pointer = (caddr_t) NULL;
2082 iwr.u.encoding.length = 0;
2083
2084 /*
2085 * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2086 * different things. Here they are used to indicate Open System vs.
2087 * Shared Key authentication algorithm. However, some drivers may use
2088 * them to select between open/restricted WEP encrypted (open = allow
2089 * both unencrypted and encrypted frames; restricted = only allow
2090 * encrypted frames).
2091 */
2092
2093 if (!drv->use_crypt) {
2094 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2095 } else {
2096 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2097 iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2098 if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2099 iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2100 }
2101
2102 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2103 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODE]: %s",
2104 strerror(errno));
2105 ret = -1;
2106 }
2107
2108 return ret;
2109 }
2110
2111
wpa_driver_wext_associate(void * priv,struct wpa_driver_associate_params * params)2112 int wpa_driver_wext_associate(void *priv,
2113 struct wpa_driver_associate_params *params)
2114 {
2115 struct wpa_driver_wext_data *drv = priv;
2116 int ret = 0;
2117 int allow_unencrypted_eapol;
2118 int value;
2119
2120 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2121
2122 if (drv->cfg80211) {
2123 /*
2124 * Stop cfg80211 from trying to associate before we are done
2125 * with all parameters.
2126 */
2127 if (wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) {
2128 wpa_printf(MSG_DEBUG,
2129 "WEXT: Failed to clear SSID to stop pending cfg80211 association attempts (if any)");
2130 /* continue anyway */
2131 }
2132 }
2133
2134 if (wpa_driver_wext_set_drop_unencrypted(drv, params->drop_unencrypted)
2135 < 0)
2136 ret = -1;
2137 if (wpa_driver_wext_set_auth_alg(drv, params->auth_alg) < 0)
2138 ret = -1;
2139 if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
2140 ret = -1;
2141
2142 /*
2143 * If the driver did not support SIOCSIWAUTH, fallback to
2144 * SIOCSIWENCODE here.
2145 */
2146 if (drv->auth_alg_fallback &&
2147 wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
2148 ret = -1;
2149
2150 if (!params->bssid &&
2151 wpa_driver_wext_set_bssid(drv, NULL) < 0)
2152 ret = -1;
2153
2154 /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2155 * from configuration, not from here, where only the selected suite is
2156 * available */
2157 if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2158 < 0)
2159 ret = -1;
2160 if (params->wpa_proto & WPA_PROTO_RSN)
2161 value = IW_AUTH_WPA_VERSION_WPA2;
2162 else if (params->wpa_proto & WPA_PROTO_WPA)
2163 value = IW_AUTH_WPA_VERSION_WPA;
2164 else
2165 value = IW_AUTH_WPA_VERSION_DISABLED;
2166 if (wpa_driver_wext_set_auth_param(drv,
2167 IW_AUTH_WPA_VERSION, value) < 0)
2168 ret = -1;
2169 value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
2170 if (wpa_driver_wext_set_auth_param(drv,
2171 IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2172 ret = -1;
2173 value = wpa_driver_wext_cipher2wext(params->group_suite);
2174 if (wpa_driver_wext_set_auth_param(drv,
2175 IW_AUTH_CIPHER_GROUP, value) < 0)
2176 ret = -1;
2177 value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
2178 if (wpa_driver_wext_set_auth_param(drv,
2179 IW_AUTH_KEY_MGMT, value) < 0)
2180 ret = -1;
2181 value = params->key_mgmt_suite != WPA_KEY_MGMT_NONE ||
2182 params->pairwise_suite != WPA_CIPHER_NONE ||
2183 params->group_suite != WPA_CIPHER_NONE ||
2184 (params->wpa_proto & (WPA_PROTO_RSN | WPA_PROTO_WPA));
2185 if (wpa_driver_wext_set_auth_param(drv,
2186 IW_AUTH_PRIVACY_INVOKED, value) < 0)
2187 ret = -1;
2188
2189 /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2190 * not using WPA. IEEE 802.1X specifies that these frames are not
2191 * encrypted, but WPA encrypts them when pairwise keys are in use. */
2192 if (params->key_mgmt_suite == WPA_KEY_MGMT_IEEE8021X ||
2193 params->key_mgmt_suite == WPA_KEY_MGMT_PSK)
2194 allow_unencrypted_eapol = 0;
2195 else
2196 allow_unencrypted_eapol = 1;
2197
2198 if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
2199 ret = -1;
2200 if (wpa_driver_wext_set_auth_param(drv,
2201 IW_AUTH_RX_UNENCRYPTED_EAPOL,
2202 allow_unencrypted_eapol) < 0)
2203 ret = -1;
2204 #ifdef CONFIG_IEEE80211W
2205 switch (params->mgmt_frame_protection) {
2206 case NO_MGMT_FRAME_PROTECTION:
2207 value = IW_AUTH_MFP_DISABLED;
2208 break;
2209 case MGMT_FRAME_PROTECTION_OPTIONAL:
2210 value = IW_AUTH_MFP_OPTIONAL;
2211 break;
2212 case MGMT_FRAME_PROTECTION_REQUIRED:
2213 value = IW_AUTH_MFP_REQUIRED;
2214 break;
2215 };
2216 if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
2217 ret = -1;
2218 #endif /* CONFIG_IEEE80211W */
2219 if (params->freq.freq &&
2220 wpa_driver_wext_set_freq(drv, params->freq.freq) < 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 if (params->bssid &&
2226 wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2227 ret = -1;
2228 if (drv->cfg80211 &&
2229 wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2230 ret = -1;
2231
2232 return ret;
2233 }
2234
2235
wpa_driver_wext_set_auth_alg(void * priv,int auth_alg)2236 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2237 {
2238 struct wpa_driver_wext_data *drv = priv;
2239 int algs = 0, res;
2240
2241 if (auth_alg & WPA_AUTH_ALG_OPEN)
2242 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2243 if (auth_alg & WPA_AUTH_ALG_SHARED)
2244 algs |= IW_AUTH_ALG_SHARED_KEY;
2245 if (auth_alg & WPA_AUTH_ALG_LEAP)
2246 algs |= IW_AUTH_ALG_LEAP;
2247 if (algs == 0) {
2248 /* at least one algorithm should be set */
2249 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2250 }
2251
2252 res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2253 algs);
2254 drv->auth_alg_fallback = res == -2;
2255 return res;
2256 }
2257
2258
2259 /**
2260 * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2261 * @priv: Pointer to private wext data from wpa_driver_wext_init()
2262 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2263 * Returns: 0 on success, -1 on failure
2264 */
wpa_driver_wext_set_mode(void * priv,int mode)2265 int wpa_driver_wext_set_mode(void *priv, int mode)
2266 {
2267 struct wpa_driver_wext_data *drv = priv;
2268 struct iwreq iwr;
2269 int ret = -1;
2270 unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2271
2272 os_memset(&iwr, 0, sizeof(iwr));
2273 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2274 iwr.u.mode = new_mode;
2275 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2276 ret = 0;
2277 goto done;
2278 }
2279
2280 if (errno != EBUSY) {
2281 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMODE]: %s",
2282 strerror(errno));
2283 goto done;
2284 }
2285
2286 /* mac80211 doesn't allow mode changes while the device is up, so if
2287 * the device isn't in the mode we're about to change to, take device
2288 * down, try to set the mode again, and bring it back up.
2289 */
2290 if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2291 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWMODE]: %s",
2292 strerror(errno));
2293 goto done;
2294 }
2295
2296 if (iwr.u.mode == new_mode) {
2297 ret = 0;
2298 goto done;
2299 }
2300
2301 if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0) == 0) {
2302 /* Try to set the mode again while the interface is down */
2303 iwr.u.mode = new_mode;
2304 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2305 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMODE]: %s",
2306 strerror(errno));
2307 else
2308 ret = 0;
2309
2310 (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1);
2311 }
2312
2313 done:
2314 return ret;
2315 }
2316
2317
wpa_driver_wext_pmksa(struct wpa_driver_wext_data * drv,u32 cmd,const u8 * bssid,const u8 * pmkid)2318 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2319 u32 cmd, const u8 *bssid, const u8 *pmkid)
2320 {
2321 struct iwreq iwr;
2322 struct iw_pmksa pmksa;
2323 int ret = 0;
2324
2325 os_memset(&iwr, 0, sizeof(iwr));
2326 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2327 os_memset(&pmksa, 0, sizeof(pmksa));
2328 pmksa.cmd = cmd;
2329 pmksa.bssid.sa_family = ARPHRD_ETHER;
2330 if (bssid)
2331 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2332 if (pmkid)
2333 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2334 iwr.u.data.pointer = (caddr_t) &pmksa;
2335 iwr.u.data.length = sizeof(pmksa);
2336
2337 if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2338 if (errno != EOPNOTSUPP)
2339 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWPMKSA]: %s",
2340 strerror(errno));
2341 ret = -1;
2342 }
2343
2344 return ret;
2345 }
2346
2347
wpa_driver_wext_add_pmkid(void * priv,struct wpa_pmkid_params * params)2348 static int wpa_driver_wext_add_pmkid(void *priv,
2349 struct wpa_pmkid_params *params)
2350 {
2351 struct wpa_driver_wext_data *drv = priv;
2352 return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, params->bssid,
2353 params->pmkid);
2354 }
2355
2356
wpa_driver_wext_remove_pmkid(void * priv,struct wpa_pmkid_params * params)2357 static int wpa_driver_wext_remove_pmkid(void *priv,
2358 struct wpa_pmkid_params *params)
2359 {
2360 struct wpa_driver_wext_data *drv = priv;
2361 return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, params->bssid,
2362 params->pmkid);
2363 }
2364
2365
wpa_driver_wext_flush_pmkid(void * priv)2366 static int wpa_driver_wext_flush_pmkid(void *priv)
2367 {
2368 struct wpa_driver_wext_data *drv = priv;
2369 return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2370 }
2371
2372
wpa_driver_wext_get_capa(void * priv,struct wpa_driver_capa * capa)2373 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2374 {
2375 struct wpa_driver_wext_data *drv = priv;
2376 if (!drv->has_capability)
2377 return -1;
2378 os_memcpy(capa, &drv->capa, sizeof(*capa));
2379 return 0;
2380 }
2381
2382
wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data * drv,const char * ifname)2383 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2384 const char *ifname)
2385 {
2386 if (ifname == NULL) {
2387 drv->ifindex2 = -1;
2388 return 0;
2389 }
2390
2391 drv->ifindex2 = if_nametoindex(ifname);
2392 if (drv->ifindex2 <= 0)
2393 return -1;
2394
2395 wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2396 "wireless events", drv->ifindex2, ifname);
2397
2398 return 0;
2399 }
2400
2401
wpa_driver_wext_set_operstate(void * priv,int state)2402 int wpa_driver_wext_set_operstate(void *priv, int state)
2403 {
2404 struct wpa_driver_wext_data *drv = priv;
2405
2406 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2407 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2408 drv->operstate = state;
2409 return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
2410 state ? IF_OPER_UP : IF_OPER_DORMANT);
2411 }
2412
2413
wpa_driver_wext_get_version(struct wpa_driver_wext_data * drv)2414 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2415 {
2416 return drv->we_version_compiled;
2417 }
2418
2419
wext_get_radio_name(void * priv)2420 static const char * wext_get_radio_name(void *priv)
2421 {
2422 struct wpa_driver_wext_data *drv = priv;
2423 return drv->phyname;
2424 }
2425
2426
wpa_driver_wext_signal_poll(void * priv,struct wpa_signal_info * si)2427 static int wpa_driver_wext_signal_poll(void *priv, struct wpa_signal_info *si)
2428 {
2429 struct wpa_driver_wext_data *drv = priv;
2430 struct iw_statistics stats;
2431 struct iwreq iwr;
2432
2433 os_memset(si, 0, sizeof(*si));
2434 si->current_signal = -WPA_INVALID_NOISE;
2435 si->current_noise = WPA_INVALID_NOISE;
2436 si->chanwidth = CHAN_WIDTH_UNKNOWN;
2437
2438 os_memset(&iwr, 0, sizeof(iwr));
2439 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2440 iwr.u.data.pointer = (caddr_t) &stats;
2441 iwr.u.data.length = sizeof(stats);
2442 iwr.u.data.flags = 1;
2443
2444 if (ioctl(drv->ioctl_sock, SIOCGIWSTATS, &iwr) < 0) {
2445 wpa_printf(MSG_ERROR, "WEXT: SIOCGIWSTATS: %s",
2446 strerror(errno));
2447 return -1;
2448 }
2449
2450 si->current_signal = stats.qual.level -
2451 ((stats.qual.updated & IW_QUAL_DBM) ? 0x100 : 0);
2452 si->current_noise = stats.qual.noise -
2453 ((stats.qual.updated & IW_QUAL_DBM) ? 0x100 : 0);
2454 return 0;
2455 }
2456
2457
wpa_driver_wext_status(void * priv,char * buf,size_t buflen)2458 static int wpa_driver_wext_status(void *priv, char *buf, size_t buflen)
2459 {
2460 struct wpa_driver_wext_data *drv = priv;
2461 int res;
2462 char *pos, *end;
2463 unsigned char addr[ETH_ALEN];
2464
2465 pos = buf;
2466 end = buf + buflen;
2467
2468 if (linux_get_ifhwaddr(drv->ioctl_sock, drv->ifname, addr))
2469 return -1;
2470
2471 res = os_snprintf(pos, end - pos,
2472 "ifindex=%d\n"
2473 "ifname=%s\n"
2474 "addr=" MACSTR "\n",
2475 drv->ifindex,
2476 drv->ifname,
2477 MAC2STR(addr));
2478 if (os_snprintf_error(end - pos, res))
2479 return pos - buf;
2480 pos += res;
2481
2482 return pos - buf;
2483 }
2484
2485 const struct wpa_driver_ops wpa_driver_wext_ops = {
2486 .name = "wext",
2487 .desc = "Linux wireless extensions (generic)",
2488 .get_bssid = wpa_driver_wext_get_bssid,
2489 .get_ssid = wpa_driver_wext_get_ssid,
2490 .set_key = wpa_driver_wext_set_key,
2491 .set_countermeasures = wpa_driver_wext_set_countermeasures,
2492 .scan2 = wpa_driver_wext_scan,
2493 .get_scan_results2 = wpa_driver_wext_get_scan_results,
2494 .deauthenticate = wpa_driver_wext_deauthenticate,
2495 .associate = wpa_driver_wext_associate,
2496 .init = wpa_driver_wext_init,
2497 .deinit = wpa_driver_wext_deinit,
2498 .add_pmkid = wpa_driver_wext_add_pmkid,
2499 .remove_pmkid = wpa_driver_wext_remove_pmkid,
2500 .flush_pmkid = wpa_driver_wext_flush_pmkid,
2501 .get_capa = wpa_driver_wext_get_capa,
2502 .set_operstate = wpa_driver_wext_set_operstate,
2503 .get_radio_name = wext_get_radio_name,
2504 .signal_poll = wpa_driver_wext_signal_poll,
2505 .status = wpa_driver_wext_status,
2506 };
2507