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