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 int i;
972
973 if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1) < 0) {
974 if (rfkill_is_blocked(drv->rfkill)) {
975 wpa_printf(MSG_DEBUG, "WEXT: Could not yet enable "
976 "interface '%s' due to rfkill",
977 drv->ifname);
978 drv->if_disabled = 1;
979 send_rfkill_event = 1;
980 } else {
981 wpa_printf(MSG_ERROR, "WEXT: Could not set "
982 "interface '%s' UP", drv->ifname);
983 return -1;
984 }
985 }
986
987 /*
988 * Make sure that the driver does not have any obsolete PMKID entries.
989 */
990 wpa_driver_wext_flush_pmkid(drv);
991
992 if (wpa_driver_wext_set_mode(drv, 0) < 0) {
993 wpa_printf(MSG_DEBUG, "Could not configure driver to use "
994 "managed mode");
995 /* Try to use it anyway */
996 }
997
998 wpa_driver_wext_get_range(drv);
999
1000 /* Update per interface supported AKMs */
1001 for (i = 0; i < WPA_IF_MAX; i++)
1002 drv->capa.key_mgmt_iftype[i] = drv->capa.key_mgmt;
1003
1004 /*
1005 * Unlock the driver's BSSID and force to a random SSID to clear any
1006 * previous association the driver might have when the supplicant
1007 * starts up.
1008 */
1009 wpa_driver_wext_disconnect(drv);
1010
1011 drv->ifindex = if_nametoindex(drv->ifname);
1012
1013 wext_check_hostap(drv);
1014
1015 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1016 1, IF_OPER_DORMANT);
1017
1018 if (send_rfkill_event) {
1019 eloop_register_timeout(0, 0, wpa_driver_wext_send_rfkill,
1020 drv, drv->ctx);
1021 }
1022
1023 return 0;
1024 }
1025
1026
1027 /**
1028 * wpa_driver_wext_deinit - Deinitialize WE driver interface
1029 * @priv: Pointer to private wext data from wpa_driver_wext_init()
1030 *
1031 * Shut down driver interface and processing of driver events. Free
1032 * private data buffer if one was allocated in wpa_driver_wext_init().
1033 */
wpa_driver_wext_deinit(void * priv)1034 void wpa_driver_wext_deinit(void *priv)
1035 {
1036 struct wpa_driver_wext_data *drv = priv;
1037
1038 wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 0);
1039
1040 eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1041 eloop_cancel_timeout(wpa_driver_wext_send_rfkill, drv, drv->ctx);
1042
1043 /*
1044 * Clear possibly configured driver parameters in order to make it
1045 * easier to use the driver after wpa_supplicant has been terminated.
1046 */
1047 wpa_driver_wext_disconnect(drv);
1048
1049 netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1050 netlink_deinit(drv->netlink);
1051 rfkill_deinit(drv->rfkill);
1052
1053 if (drv->mlme_sock >= 0)
1054 eloop_unregister_read_sock(drv->mlme_sock);
1055
1056 (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0);
1057
1058 close(drv->ioctl_sock);
1059 if (drv->mlme_sock >= 0)
1060 close(drv->mlme_sock);
1061 os_free(drv->assoc_req_ies);
1062 os_free(drv->assoc_resp_ies);
1063 os_free(drv);
1064 }
1065
1066
1067 /**
1068 * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
1069 * @eloop_ctx: Unused
1070 * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
1071 *
1072 * This function can be used as registered timeout when starting a scan to
1073 * generate a scan completed event if the driver does not report this.
1074 */
wpa_driver_wext_scan_timeout(void * eloop_ctx,void * timeout_ctx)1075 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1076 {
1077 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1078 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1079 }
1080
1081
1082 /**
1083 * wpa_driver_wext_scan - Request the driver to initiate scan
1084 * @priv: Pointer to private wext data from wpa_driver_wext_init()
1085 * @param: Scan parameters (specific SSID to scan for (ProbeReq), etc.)
1086 * Returns: 0 on success, -1 on failure
1087 */
wpa_driver_wext_scan(void * priv,struct wpa_driver_scan_params * params)1088 int wpa_driver_wext_scan(void *priv, struct wpa_driver_scan_params *params)
1089 {
1090 struct wpa_driver_wext_data *drv = priv;
1091 struct iwreq iwr;
1092 int ret = 0, timeout;
1093 struct iw_scan_req req;
1094 const u8 *ssid = params->ssids[0].ssid;
1095 size_t ssid_len = params->ssids[0].ssid_len;
1096
1097 if (ssid_len > IW_ESSID_MAX_SIZE) {
1098 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1099 __FUNCTION__, (unsigned long) ssid_len);
1100 return -1;
1101 }
1102
1103 os_memset(&iwr, 0, sizeof(iwr));
1104 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1105
1106 if (ssid && ssid_len) {
1107 os_memset(&req, 0, sizeof(req));
1108 req.essid_len = ssid_len;
1109 req.bssid.sa_family = ARPHRD_ETHER;
1110 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1111 os_memcpy(req.essid, ssid, ssid_len);
1112 iwr.u.data.pointer = (caddr_t) &req;
1113 iwr.u.data.length = sizeof(req);
1114 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1115 }
1116
1117 if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1118 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWSCAN]: %s",
1119 strerror(errno));
1120 ret = -1;
1121 }
1122
1123 /* Not all drivers generate "scan completed" wireless event, so try to
1124 * read results after a timeout. */
1125 timeout = 10;
1126 if (drv->scan_complete_events) {
1127 /*
1128 * The driver seems to deliver SIOCGIWSCAN events to notify
1129 * when scan is complete, so use longer timeout to avoid race
1130 * conditions with scanning and following association request.
1131 */
1132 timeout = 30;
1133 }
1134 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1135 "seconds", ret, timeout);
1136 eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1137 eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
1138 drv->ctx);
1139
1140 return ret;
1141 }
1142
1143
wpa_driver_wext_giwscan(struct wpa_driver_wext_data * drv,size_t * len)1144 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
1145 size_t *len)
1146 {
1147 struct iwreq iwr;
1148 u8 *res_buf;
1149 size_t res_buf_len;
1150
1151 res_buf_len = IW_SCAN_MAX_DATA;
1152 for (;;) {
1153 res_buf = os_malloc(res_buf_len);
1154 if (res_buf == NULL)
1155 return NULL;
1156 os_memset(&iwr, 0, sizeof(iwr));
1157 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1158 iwr.u.data.pointer = res_buf;
1159 iwr.u.data.length = res_buf_len;
1160
1161 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1162 break;
1163
1164 if (errno == E2BIG && res_buf_len < 65535) {
1165 os_free(res_buf);
1166 res_buf = NULL;
1167 res_buf_len *= 2;
1168 if (res_buf_len > 65535)
1169 res_buf_len = 65535; /* 16-bit length field */
1170 wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1171 "trying larger buffer (%lu bytes)",
1172 (unsigned long) res_buf_len);
1173 } else {
1174 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWSCAN]: %s",
1175 strerror(errno));
1176 os_free(res_buf);
1177 return NULL;
1178 }
1179 }
1180
1181 if (iwr.u.data.length > res_buf_len) {
1182 os_free(res_buf);
1183 return NULL;
1184 }
1185 *len = iwr.u.data.length;
1186
1187 return res_buf;
1188 }
1189
1190
1191 /*
1192 * Data structure for collecting WEXT scan results. This is needed to allow
1193 * the various methods of reporting IEs to be combined into a single IE buffer.
1194 */
1195 struct wext_scan_data {
1196 struct wpa_scan_res res;
1197 u8 *ie;
1198 size_t ie_len;
1199 u8 ssid[SSID_MAX_LEN];
1200 size_t ssid_len;
1201 int maxrate;
1202 };
1203
1204
wext_get_scan_mode(struct iw_event * iwe,struct wext_scan_data * res)1205 static void wext_get_scan_mode(struct iw_event *iwe,
1206 struct wext_scan_data *res)
1207 {
1208 if (iwe->u.mode == IW_MODE_ADHOC)
1209 res->res.caps |= IEEE80211_CAP_IBSS;
1210 else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1211 res->res.caps |= IEEE80211_CAP_ESS;
1212 }
1213
1214
wext_get_scan_ssid(struct iw_event * iwe,struct wext_scan_data * res,char * custom,char * end)1215 static void wext_get_scan_ssid(struct iw_event *iwe,
1216 struct wext_scan_data *res, char *custom,
1217 char *end)
1218 {
1219 int ssid_len = iwe->u.essid.length;
1220 if (ssid_len > end - custom)
1221 return;
1222 if (iwe->u.essid.flags &&
1223 ssid_len > 0 &&
1224 ssid_len <= IW_ESSID_MAX_SIZE) {
1225 os_memcpy(res->ssid, custom, ssid_len);
1226 res->ssid_len = ssid_len;
1227 }
1228 }
1229
1230
wext_get_scan_freq(struct iw_event * iwe,struct wext_scan_data * res)1231 static void wext_get_scan_freq(struct iw_event *iwe,
1232 struct wext_scan_data *res)
1233 {
1234 int divi = 1000000, i;
1235
1236 if (iwe->u.freq.e == 0) {
1237 /*
1238 * Some drivers do not report frequency, but a channel.
1239 * Try to map this to frequency by assuming they are using
1240 * IEEE 802.11b/g. But don't overwrite a previously parsed
1241 * frequency if the driver sends both frequency and channel,
1242 * since the driver may be sending an A-band channel that we
1243 * don't handle here.
1244 */
1245
1246 if (res->res.freq)
1247 return;
1248
1249 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1250 res->res.freq = 2407 + 5 * iwe->u.freq.m;
1251 return;
1252 } else if (iwe->u.freq.m == 14) {
1253 res->res.freq = 2484;
1254 return;
1255 }
1256 }
1257
1258 if (iwe->u.freq.e > 6) {
1259 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1260 MACSTR " m=%d e=%d)",
1261 MAC2STR(res->res.bssid), iwe->u.freq.m,
1262 iwe->u.freq.e);
1263 return;
1264 }
1265
1266 for (i = 0; i < iwe->u.freq.e; i++)
1267 divi /= 10;
1268 res->res.freq = iwe->u.freq.m / divi;
1269 }
1270
1271
wext_get_scan_qual(struct wpa_driver_wext_data * drv,struct iw_event * iwe,struct wext_scan_data * res)1272 static void wext_get_scan_qual(struct wpa_driver_wext_data *drv,
1273 struct iw_event *iwe,
1274 struct wext_scan_data *res)
1275 {
1276 res->res.qual = iwe->u.qual.qual;
1277 res->res.noise = iwe->u.qual.noise;
1278 res->res.level = iwe->u.qual.level;
1279 if (iwe->u.qual.updated & IW_QUAL_QUAL_INVALID)
1280 res->res.flags |= WPA_SCAN_QUAL_INVALID;
1281 if (iwe->u.qual.updated & IW_QUAL_LEVEL_INVALID)
1282 res->res.flags |= WPA_SCAN_LEVEL_INVALID;
1283 if (iwe->u.qual.updated & IW_QUAL_NOISE_INVALID)
1284 res->res.flags |= WPA_SCAN_NOISE_INVALID;
1285 if (iwe->u.qual.updated & IW_QUAL_DBM)
1286 res->res.flags |= WPA_SCAN_LEVEL_DBM;
1287 if ((iwe->u.qual.updated & IW_QUAL_DBM) ||
1288 ((iwe->u.qual.level != 0) &&
1289 (iwe->u.qual.level > drv->max_level))) {
1290 if (iwe->u.qual.level >= 64)
1291 res->res.level -= 0x100;
1292 if (iwe->u.qual.noise >= 64)
1293 res->res.noise -= 0x100;
1294 }
1295 }
1296
1297
wext_get_scan_encode(struct iw_event * iwe,struct wext_scan_data * res)1298 static void wext_get_scan_encode(struct iw_event *iwe,
1299 struct wext_scan_data *res)
1300 {
1301 if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1302 res->res.caps |= IEEE80211_CAP_PRIVACY;
1303 }
1304
1305
wext_get_scan_rate(struct iw_event * iwe,struct wext_scan_data * res,char * pos,char * end)1306 static void wext_get_scan_rate(struct iw_event *iwe,
1307 struct wext_scan_data *res, char *pos,
1308 char *end)
1309 {
1310 int maxrate;
1311 char *custom = pos + IW_EV_LCP_LEN;
1312 struct iw_param p;
1313 size_t clen;
1314
1315 clen = iwe->len;
1316 if (clen > (size_t) (end - custom))
1317 return;
1318 maxrate = 0;
1319 while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1320 /* Note: may be misaligned, make a local, aligned copy */
1321 os_memcpy(&p, custom, sizeof(struct iw_param));
1322 if (p.value > maxrate)
1323 maxrate = p.value;
1324 clen -= sizeof(struct iw_param);
1325 custom += sizeof(struct iw_param);
1326 }
1327
1328 /* Convert the maxrate from WE-style (b/s units) to
1329 * 802.11 rates (500000 b/s units).
1330 */
1331 res->maxrate = maxrate / 500000;
1332 }
1333
1334
wext_get_scan_iwevgenie(struct iw_event * iwe,struct wext_scan_data * res,char * custom,char * end)1335 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1336 struct wext_scan_data *res, char *custom,
1337 char *end)
1338 {
1339 char *genie, *gpos, *gend;
1340 u8 *tmp;
1341
1342 if (iwe->u.data.length == 0)
1343 return;
1344
1345 gpos = genie = custom;
1346 gend = genie + iwe->u.data.length;
1347 if (gend > end) {
1348 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1349 return;
1350 }
1351
1352 tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1353 if (tmp == NULL)
1354 return;
1355 os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1356 res->ie = tmp;
1357 res->ie_len += gend - gpos;
1358 }
1359
1360
wext_get_scan_custom(struct iw_event * iwe,struct wext_scan_data * res,char * custom,char * end)1361 static void wext_get_scan_custom(struct iw_event *iwe,
1362 struct wext_scan_data *res, char *custom,
1363 char *end)
1364 {
1365 size_t clen;
1366 u8 *tmp;
1367
1368 clen = iwe->u.data.length;
1369 if (clen > (size_t) (end - custom))
1370 return;
1371
1372 if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1373 char *spos;
1374 int bytes;
1375 spos = custom + 7;
1376 bytes = custom + clen - spos;
1377 if (bytes & 1 || bytes == 0)
1378 return;
1379 bytes /= 2;
1380 tmp = os_realloc(res->ie, res->ie_len + bytes);
1381 if (tmp == NULL)
1382 return;
1383 res->ie = tmp;
1384 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1385 return;
1386 res->ie_len += bytes;
1387 } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1388 char *spos;
1389 int bytes;
1390 spos = custom + 7;
1391 bytes = custom + clen - spos;
1392 if (bytes & 1 || bytes == 0)
1393 return;
1394 bytes /= 2;
1395 tmp = os_realloc(res->ie, res->ie_len + bytes);
1396 if (tmp == NULL)
1397 return;
1398 res->ie = tmp;
1399 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1400 return;
1401 res->ie_len += bytes;
1402 } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1403 char *spos;
1404 int bytes;
1405 u8 bin[8];
1406 spos = custom + 4;
1407 bytes = custom + clen - spos;
1408 if (bytes != 16) {
1409 wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1410 return;
1411 }
1412 bytes /= 2;
1413 if (hexstr2bin(spos, bin, bytes) < 0) {
1414 wpa_printf(MSG_DEBUG, "WEXT: Invalid TSF value");
1415 return;
1416 }
1417 res->res.tsf += WPA_GET_BE64(bin);
1418 }
1419 }
1420
1421
wext_19_iw_point(struct wpa_driver_wext_data * drv,u16 cmd)1422 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1423 {
1424 return drv->we_version_compiled > 18 &&
1425 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1426 cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1427 }
1428
1429
wpa_driver_wext_add_scan_entry(struct wpa_scan_results * res,struct wext_scan_data * data)1430 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1431 struct wext_scan_data *data)
1432 {
1433 struct wpa_scan_res **tmp;
1434 struct wpa_scan_res *r;
1435 size_t extra_len;
1436 u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1437
1438 /* Figure out whether we need to fake any IEs */
1439 pos = data->ie;
1440 end = pos + data->ie_len;
1441 while (pos && end - pos > 1) {
1442 if (2 + pos[1] > end - pos)
1443 break;
1444 if (pos[0] == WLAN_EID_SSID)
1445 ssid_ie = pos;
1446 else if (pos[0] == WLAN_EID_SUPP_RATES)
1447 rate_ie = pos;
1448 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1449 rate_ie = pos;
1450 pos += 2 + pos[1];
1451 }
1452
1453 extra_len = 0;
1454 if (ssid_ie == NULL)
1455 extra_len += 2 + data->ssid_len;
1456 if (rate_ie == NULL && data->maxrate)
1457 extra_len += 3;
1458
1459 r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1460 if (r == NULL)
1461 return;
1462 os_memcpy(r, &data->res, sizeof(*r));
1463 r->ie_len = extra_len + data->ie_len;
1464 pos = (u8 *) (r + 1);
1465 if (ssid_ie == NULL) {
1466 /*
1467 * Generate a fake SSID IE since the driver did not report
1468 * a full IE list.
1469 */
1470 *pos++ = WLAN_EID_SSID;
1471 *pos++ = data->ssid_len;
1472 os_memcpy(pos, data->ssid, data->ssid_len);
1473 pos += data->ssid_len;
1474 }
1475 if (rate_ie == NULL && data->maxrate) {
1476 /*
1477 * Generate a fake Supported Rates IE since the driver did not
1478 * report a full IE list.
1479 */
1480 *pos++ = WLAN_EID_SUPP_RATES;
1481 *pos++ = 1;
1482 *pos++ = data->maxrate;
1483 }
1484 if (data->ie)
1485 os_memcpy(pos, data->ie, data->ie_len);
1486
1487 tmp = os_realloc_array(res->res, res->num + 1,
1488 sizeof(struct wpa_scan_res *));
1489 if (tmp == NULL) {
1490 os_free(r);
1491 return;
1492 }
1493 tmp[res->num++] = r;
1494 res->res = tmp;
1495 }
1496
1497
1498 /**
1499 * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1500 * @priv: Pointer to private wext data from wpa_driver_wext_init()
1501 * Returns: Scan results on success, -1 on failure
1502 */
wpa_driver_wext_get_scan_results(void * priv)1503 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1504 {
1505 struct wpa_driver_wext_data *drv = priv;
1506 size_t len;
1507 int first;
1508 u8 *res_buf;
1509 struct iw_event iwe_buf, *iwe = &iwe_buf;
1510 char *pos, *end, *custom;
1511 struct wpa_scan_results *res;
1512 struct wext_scan_data data;
1513
1514 res_buf = wpa_driver_wext_giwscan(drv, &len);
1515 if (res_buf == NULL)
1516 return NULL;
1517
1518 first = 1;
1519
1520 res = os_zalloc(sizeof(*res));
1521 if (res == NULL) {
1522 os_free(res_buf);
1523 return NULL;
1524 }
1525
1526 pos = (char *) res_buf;
1527 end = (char *) res_buf + len;
1528 os_memset(&data, 0, sizeof(data));
1529
1530 while ((size_t) (end - pos) >= IW_EV_LCP_LEN) {
1531 /* Event data may be unaligned, so make a local, aligned copy
1532 * before processing. */
1533 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1534 if (iwe->len <= IW_EV_LCP_LEN || iwe->len > end - pos)
1535 break;
1536
1537 custom = pos + IW_EV_POINT_LEN;
1538 if (wext_19_iw_point(drv, iwe->cmd)) {
1539 /* WE-19 removed the pointer from struct iw_point */
1540 char *dpos = (char *) &iwe_buf.u.data.length;
1541 int dlen = dpos - (char *) &iwe_buf;
1542 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1543 sizeof(struct iw_event) - dlen);
1544 } else {
1545 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1546 custom += IW_EV_POINT_OFF;
1547 }
1548
1549 switch (iwe->cmd) {
1550 case SIOCGIWAP:
1551 if (!first)
1552 wpa_driver_wext_add_scan_entry(res, &data);
1553 first = 0;
1554 os_free(data.ie);
1555 os_memset(&data, 0, sizeof(data));
1556 os_memcpy(data.res.bssid,
1557 iwe->u.ap_addr.sa_data, ETH_ALEN);
1558 break;
1559 case SIOCGIWMODE:
1560 wext_get_scan_mode(iwe, &data);
1561 break;
1562 case SIOCGIWESSID:
1563 wext_get_scan_ssid(iwe, &data, custom, end);
1564 break;
1565 case SIOCGIWFREQ:
1566 wext_get_scan_freq(iwe, &data);
1567 break;
1568 case IWEVQUAL:
1569 wext_get_scan_qual(drv, iwe, &data);
1570 break;
1571 case SIOCGIWENCODE:
1572 wext_get_scan_encode(iwe, &data);
1573 break;
1574 case SIOCGIWRATE:
1575 wext_get_scan_rate(iwe, &data, pos, end);
1576 break;
1577 case IWEVGENIE:
1578 wext_get_scan_iwevgenie(iwe, &data, custom, end);
1579 break;
1580 case IWEVCUSTOM:
1581 wext_get_scan_custom(iwe, &data, custom, end);
1582 break;
1583 }
1584
1585 pos += iwe->len;
1586 }
1587 os_free(res_buf);
1588 res_buf = NULL;
1589 if (!first)
1590 wpa_driver_wext_add_scan_entry(res, &data);
1591 os_free(data.ie);
1592
1593 wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1594 (unsigned long) len, (unsigned long) res->num);
1595
1596 return res;
1597 }
1598
1599
wpa_driver_wext_get_range(void * priv)1600 static int wpa_driver_wext_get_range(void *priv)
1601 {
1602 struct wpa_driver_wext_data *drv = priv;
1603 struct iw_range *range;
1604 struct iwreq iwr;
1605 int minlen;
1606 size_t buflen;
1607
1608 /*
1609 * Use larger buffer than struct iw_range in order to allow the
1610 * structure to grow in the future.
1611 */
1612 buflen = sizeof(struct iw_range) + 500;
1613 range = os_zalloc(buflen);
1614 if (range == NULL)
1615 return -1;
1616
1617 os_memset(&iwr, 0, sizeof(iwr));
1618 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1619 iwr.u.data.pointer = (caddr_t) range;
1620 iwr.u.data.length = buflen;
1621
1622 minlen = ((char *) &range->enc_capa) - (char *) range +
1623 sizeof(range->enc_capa);
1624
1625 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1626 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWRANGE]: %s",
1627 strerror(errno));
1628 os_free(range);
1629 return -1;
1630 } else if (iwr.u.data.length >= minlen &&
1631 range->we_version_compiled >= 18) {
1632 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1633 "WE(source)=%d enc_capa=0x%x",
1634 range->we_version_compiled,
1635 range->we_version_source,
1636 range->enc_capa);
1637 drv->has_capability = 1;
1638 drv->we_version_compiled = range->we_version_compiled;
1639 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1640 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1641 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1642 }
1643 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1644 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1645 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1646 }
1647 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1648 WPA_DRIVER_CAPA_ENC_WEP104;
1649 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP128;
1650 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1651 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1652 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1653 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1654 if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
1655 drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE_PSK |
1656 WPA_DRIVER_FLAGS_4WAY_HANDSHAKE_8021X;
1657 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1658 WPA_DRIVER_AUTH_SHARED |
1659 WPA_DRIVER_AUTH_LEAP;
1660 drv->capa.max_scan_ssids = 1;
1661
1662 wpa_printf(MSG_DEBUG, " capabilities: key_mgmt 0x%x enc 0x%x "
1663 "flags 0x%llx",
1664 drv->capa.key_mgmt, drv->capa.enc,
1665 (unsigned long long) drv->capa.flags);
1666 } else {
1667 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1668 "assuming WPA is not supported");
1669 }
1670
1671 drv->max_level = range->max_qual.level;
1672
1673 os_free(range);
1674 return 0;
1675 }
1676
1677
wpa_driver_wext_set_psk(struct wpa_driver_wext_data * drv,const u8 * psk)1678 static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
1679 const u8 *psk)
1680 {
1681 struct iw_encode_ext *ext;
1682 struct iwreq iwr;
1683 int ret;
1684
1685 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1686
1687 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE_8021X))
1688 return 0;
1689
1690 if (!psk)
1691 return 0;
1692
1693 os_memset(&iwr, 0, sizeof(iwr));
1694 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1695
1696 ext = os_zalloc(sizeof(*ext) + PMK_LEN);
1697 if (ext == NULL)
1698 return -1;
1699
1700 iwr.u.encoding.pointer = (caddr_t) ext;
1701 iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
1702 ext->key_len = PMK_LEN;
1703 os_memcpy(&ext->key, psk, ext->key_len);
1704 ext->alg = IW_ENCODE_ALG_PMK;
1705
1706 ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
1707 if (ret < 0)
1708 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODEEXT] PMK: %s",
1709 strerror(errno));
1710 os_free(ext);
1711
1712 return ret;
1713 }
1714
1715
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)1716 static int wpa_driver_wext_set_key_ext(void *priv, enum wpa_alg alg,
1717 const u8 *addr, int key_idx,
1718 int set_tx, const u8 *seq,
1719 size_t seq_len,
1720 const u8 *key, size_t key_len,
1721 enum key_flag key_flag)
1722 {
1723 struct wpa_driver_wext_data *drv = priv;
1724 struct iwreq iwr;
1725 int ret = 0;
1726 struct iw_encode_ext *ext;
1727
1728 if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1729 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1730 __FUNCTION__, (unsigned long) seq_len);
1731 return -1;
1732 }
1733
1734 ext = os_zalloc(sizeof(*ext) + key_len);
1735 if (ext == NULL)
1736 return -1;
1737 os_memset(&iwr, 0, sizeof(iwr));
1738 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1739 iwr.u.encoding.flags = key_idx + 1;
1740 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1741 if (alg == WPA_ALG_NONE)
1742 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1743 iwr.u.encoding.pointer = (caddr_t) ext;
1744 iwr.u.encoding.length = sizeof(*ext) + key_len;
1745
1746 if (addr == NULL || is_broadcast_ether_addr(addr))
1747 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1748 if (set_tx)
1749 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1750
1751 ext->addr.sa_family = ARPHRD_ETHER;
1752 if (addr)
1753 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1754 else
1755 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1756 if (key && key_len) {
1757 os_memcpy(ext + 1, key, key_len);
1758 ext->key_len = key_len;
1759 }
1760 if (key_flag & KEY_FLAG_PMK) {
1761 ext->alg = IW_ENCODE_ALG_PMK;
1762 } else {
1763 switch (alg) {
1764 case WPA_ALG_NONE:
1765 ext->alg = IW_ENCODE_ALG_NONE;
1766 break;
1767 case WPA_ALG_WEP:
1768 ext->alg = IW_ENCODE_ALG_WEP;
1769 break;
1770 case WPA_ALG_TKIP:
1771 ext->alg = IW_ENCODE_ALG_TKIP;
1772 break;
1773 case WPA_ALG_CCMP:
1774 ext->alg = IW_ENCODE_ALG_CCMP;
1775 break;
1776 case WPA_ALG_BIP_CMAC_128:
1777 ext->alg = IW_ENCODE_ALG_AES_CMAC;
1778 break;
1779 default:
1780 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1781 __FUNCTION__, alg);
1782 os_free(ext);
1783 return -1;
1784 }
1785 }
1786
1787 if (seq && seq_len) {
1788 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1789 os_memcpy(ext->rx_seq, seq, seq_len);
1790 }
1791
1792 if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1793 ret = errno == EOPNOTSUPP ? -2 : -1;
1794 if (errno == ENODEV) {
1795 /*
1796 * ndiswrapper seems to be returning incorrect error
1797 * code.. */
1798 ret = -2;
1799 }
1800
1801 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODEEXT]: %s",
1802 strerror(errno));
1803 }
1804
1805 os_free(ext);
1806 return ret;
1807 }
1808
1809
1810 /**
1811 * wpa_driver_wext_set_key - Configure encryption key
1812 * @priv: Pointer to private wext data from wpa_driver_wext_init()
1813 * @params: Key parameters
1814 * Returns: 0 on success, -1 on failure
1815 *
1816 * This function uses SIOCSIWENCODEEXT by default, but tries to use
1817 * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1818 */
wpa_driver_wext_set_key(void * priv,struct wpa_driver_set_key_params * params)1819 static int wpa_driver_wext_set_key(void *priv,
1820 struct wpa_driver_set_key_params *params)
1821 {
1822 struct wpa_driver_wext_data *drv = priv;
1823 struct iwreq iwr;
1824 int ret = 0;
1825 enum wpa_alg alg = params->alg;
1826 enum key_flag key_flag = params->key_flag;
1827 const u8 *addr = params->addr;
1828 int key_idx = params->key_idx;
1829 int set_tx = params->set_tx;
1830 const u8 *seq = params->seq;
1831 size_t seq_len = params->seq_len;
1832 const u8 *key = params->key;
1833 size_t key_len = params->key_len;
1834
1835 wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1836 "key_len=%lu",
1837 __FUNCTION__, alg, key_idx, set_tx,
1838 (unsigned long) seq_len, (unsigned long) key_len);
1839
1840 ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1841 seq, seq_len, key, key_len, key_flag);
1842 if (ret == 0)
1843 return 0;
1844
1845 if (ret == -2 &&
1846 (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1847 wpa_printf(MSG_DEBUG, "Driver did not support "
1848 "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1849 ret = 0;
1850 } else {
1851 wpa_printf(MSG_DEBUG, "Driver did not support "
1852 "SIOCSIWENCODEEXT");
1853 return ret;
1854 }
1855
1856 os_memset(&iwr, 0, sizeof(iwr));
1857 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1858 iwr.u.encoding.flags = key_idx + 1;
1859 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1860 if (alg == WPA_ALG_NONE)
1861 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1862 iwr.u.encoding.pointer = (caddr_t) key;
1863 iwr.u.encoding.length = key_len;
1864
1865 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1866 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODE]: %s",
1867 strerror(errno));
1868 ret = -1;
1869 }
1870
1871 if (set_tx && alg != WPA_ALG_NONE) {
1872 os_memset(&iwr, 0, sizeof(iwr));
1873 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1874 iwr.u.encoding.flags = key_idx + 1;
1875 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1876 iwr.u.encoding.pointer = (caddr_t) NULL;
1877 iwr.u.encoding.length = 0;
1878 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1879 wpa_printf(MSG_ERROR,
1880 "ioctl[SIOCSIWENCODE] (set_tx): %s",
1881 strerror(errno));
1882 ret = -1;
1883 }
1884 }
1885
1886 return ret;
1887 }
1888
1889
wpa_driver_wext_set_countermeasures(void * priv,int enabled)1890 static int wpa_driver_wext_set_countermeasures(void *priv,
1891 int enabled)
1892 {
1893 struct wpa_driver_wext_data *drv = priv;
1894 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1895 return wpa_driver_wext_set_auth_param(drv,
1896 IW_AUTH_TKIP_COUNTERMEASURES,
1897 enabled);
1898 }
1899
1900
wpa_driver_wext_set_drop_unencrypted(void * priv,int enabled)1901 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
1902 int enabled)
1903 {
1904 struct wpa_driver_wext_data *drv = priv;
1905 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1906 drv->use_crypt = enabled;
1907 return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1908 enabled);
1909 }
1910
1911
wpa_driver_wext_mlme(struct wpa_driver_wext_data * drv,const u8 * addr,int cmd,u16 reason_code)1912 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
1913 const u8 *addr, int cmd, u16 reason_code)
1914 {
1915 struct iwreq iwr;
1916 struct iw_mlme mlme;
1917 int ret = 0;
1918
1919 os_memset(&iwr, 0, sizeof(iwr));
1920 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1921 os_memset(&mlme, 0, sizeof(mlme));
1922 mlme.cmd = cmd;
1923 mlme.reason_code = reason_code;
1924 mlme.addr.sa_family = ARPHRD_ETHER;
1925 os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1926 iwr.u.data.pointer = (caddr_t) &mlme;
1927 iwr.u.data.length = sizeof(mlme);
1928
1929 if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1930 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMLME]: %s",
1931 strerror(errno));
1932 ret = -1;
1933 }
1934
1935 return ret;
1936 }
1937
1938
wpa_driver_wext_disconnect(struct wpa_driver_wext_data * drv)1939 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv)
1940 {
1941 struct iwreq iwr;
1942 const u8 null_bssid[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
1943 u8 ssid[SSID_MAX_LEN];
1944 int i;
1945
1946 /*
1947 * Only force-disconnect when the card is in infrastructure mode,
1948 * otherwise the driver might interpret the cleared BSSID and random
1949 * SSID as an attempt to create a new ad-hoc network.
1950 */
1951 os_memset(&iwr, 0, sizeof(iwr));
1952 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1953 if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
1954 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWMODE]: %s",
1955 strerror(errno));
1956 iwr.u.mode = IW_MODE_INFRA;
1957 }
1958
1959 if (iwr.u.mode == IW_MODE_INFRA) {
1960 /* Clear the BSSID selection */
1961 if (wpa_driver_wext_set_bssid(drv, null_bssid) < 0) {
1962 wpa_printf(MSG_DEBUG, "WEXT: Failed to clear BSSID "
1963 "selection on disconnect");
1964 }
1965
1966 if (drv->cfg80211) {
1967 /*
1968 * cfg80211 supports SIOCSIWMLME commands, so there is
1969 * no need for the random SSID hack, but clear the
1970 * SSID.
1971 */
1972 if (wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) {
1973 wpa_printf(MSG_DEBUG, "WEXT: Failed to clear "
1974 "SSID on disconnect");
1975 }
1976 return;
1977 }
1978
1979 /*
1980 * Set a random SSID to make sure the driver will not be trying
1981 * to associate with something even if it does not understand
1982 * SIOCSIWMLME commands (or tries to associate automatically
1983 * after deauth/disassoc).
1984 */
1985 for (i = 0; i < SSID_MAX_LEN; i++)
1986 ssid[i] = rand() & 0xFF;
1987 if (wpa_driver_wext_set_ssid(drv, ssid, SSID_MAX_LEN) < 0) {
1988 wpa_printf(MSG_DEBUG, "WEXT: Failed to set bogus "
1989 "SSID to disconnect");
1990 }
1991 }
1992 }
1993
1994
wpa_driver_wext_deauthenticate(void * priv,const u8 * addr,u16 reason_code)1995 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
1996 u16 reason_code)
1997 {
1998 struct wpa_driver_wext_data *drv = priv;
1999 int ret;
2000 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2001 ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
2002 wpa_driver_wext_disconnect(drv);
2003 return ret;
2004 }
2005
2006
wpa_driver_wext_set_gen_ie(void * priv,const u8 * ie,size_t ie_len)2007 static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
2008 size_t ie_len)
2009 {
2010 struct wpa_driver_wext_data *drv = priv;
2011 struct iwreq iwr;
2012 int ret = 0;
2013
2014 os_memset(&iwr, 0, sizeof(iwr));
2015 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2016 iwr.u.data.pointer = (caddr_t) ie;
2017 iwr.u.data.length = ie_len;
2018
2019 if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
2020 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWGENIE]: %s",
2021 strerror(errno));
2022 ret = -1;
2023 }
2024
2025 return ret;
2026 }
2027
2028
wpa_driver_wext_cipher2wext(int cipher)2029 int wpa_driver_wext_cipher2wext(int cipher)
2030 {
2031 switch (cipher) {
2032 case WPA_CIPHER_NONE:
2033 return IW_AUTH_CIPHER_NONE;
2034 case WPA_CIPHER_WEP40:
2035 return IW_AUTH_CIPHER_WEP40;
2036 case WPA_CIPHER_TKIP:
2037 return IW_AUTH_CIPHER_TKIP;
2038 case WPA_CIPHER_CCMP:
2039 return IW_AUTH_CIPHER_CCMP;
2040 case WPA_CIPHER_WEP104:
2041 return IW_AUTH_CIPHER_WEP104;
2042 default:
2043 return 0;
2044 }
2045 }
2046
2047
wpa_driver_wext_keymgmt2wext(int keymgmt)2048 int wpa_driver_wext_keymgmt2wext(int keymgmt)
2049 {
2050 switch (keymgmt) {
2051 case WPA_KEY_MGMT_IEEE8021X:
2052 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
2053 return IW_AUTH_KEY_MGMT_802_1X;
2054 case WPA_KEY_MGMT_PSK:
2055 return IW_AUTH_KEY_MGMT_PSK;
2056 default:
2057 return 0;
2058 }
2059 }
2060
2061
2062 static int
wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data * drv,struct wpa_driver_associate_params * params)2063 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
2064 struct wpa_driver_associate_params *params)
2065 {
2066 struct iwreq iwr;
2067 int ret = 0;
2068
2069 wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
2070 "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
2071
2072 os_memset(&iwr, 0, sizeof(iwr));
2073 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2074 /* Just changing mode, not actual keys */
2075 iwr.u.encoding.flags = 0;
2076 iwr.u.encoding.pointer = (caddr_t) NULL;
2077 iwr.u.encoding.length = 0;
2078
2079 /*
2080 * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
2081 * different things. Here they are used to indicate Open System vs.
2082 * Shared Key authentication algorithm. However, some drivers may use
2083 * them to select between open/restricted WEP encrypted (open = allow
2084 * both unencrypted and encrypted frames; restricted = only allow
2085 * encrypted frames).
2086 */
2087
2088 if (!drv->use_crypt) {
2089 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
2090 } else {
2091 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2092 iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2093 if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2094 iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2095 }
2096
2097 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2098 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWENCODE]: %s",
2099 strerror(errno));
2100 ret = -1;
2101 }
2102
2103 return ret;
2104 }
2105
2106
wpa_driver_wext_associate(void * priv,struct wpa_driver_associate_params * params)2107 int wpa_driver_wext_associate(void *priv,
2108 struct wpa_driver_associate_params *params)
2109 {
2110 struct wpa_driver_wext_data *drv = priv;
2111 int ret = 0;
2112 int allow_unencrypted_eapol;
2113 int value;
2114
2115 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2116
2117 if (drv->cfg80211) {
2118 /*
2119 * Stop cfg80211 from trying to associate before we are done
2120 * with all parameters.
2121 */
2122 if (wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) {
2123 wpa_printf(MSG_DEBUG,
2124 "WEXT: Failed to clear SSID to stop pending cfg80211 association attempts (if any)");
2125 /* continue anyway */
2126 }
2127 }
2128
2129 if (wpa_driver_wext_set_drop_unencrypted(drv, params->drop_unencrypted)
2130 < 0)
2131 ret = -1;
2132 if (wpa_driver_wext_set_auth_alg(drv, params->auth_alg) < 0)
2133 ret = -1;
2134 if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
2135 ret = -1;
2136
2137 /*
2138 * If the driver did not support SIOCSIWAUTH, fallback to
2139 * SIOCSIWENCODE here.
2140 */
2141 if (drv->auth_alg_fallback &&
2142 wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
2143 ret = -1;
2144
2145 if (!params->bssid &&
2146 wpa_driver_wext_set_bssid(drv, NULL) < 0)
2147 ret = -1;
2148
2149 /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2150 * from configuration, not from here, where only the selected suite is
2151 * available */
2152 if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2153 < 0)
2154 ret = -1;
2155 if (params->wpa_proto & WPA_PROTO_RSN)
2156 value = IW_AUTH_WPA_VERSION_WPA2;
2157 else if (params->wpa_proto & WPA_PROTO_WPA)
2158 value = IW_AUTH_WPA_VERSION_WPA;
2159 else
2160 value = IW_AUTH_WPA_VERSION_DISABLED;
2161 if (wpa_driver_wext_set_auth_param(drv,
2162 IW_AUTH_WPA_VERSION, value) < 0)
2163 ret = -1;
2164 value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
2165 if (wpa_driver_wext_set_auth_param(drv,
2166 IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2167 ret = -1;
2168 value = wpa_driver_wext_cipher2wext(params->group_suite);
2169 if (wpa_driver_wext_set_auth_param(drv,
2170 IW_AUTH_CIPHER_GROUP, value) < 0)
2171 ret = -1;
2172 value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
2173 if (wpa_driver_wext_set_auth_param(drv,
2174 IW_AUTH_KEY_MGMT, value) < 0)
2175 ret = -1;
2176 value = params->key_mgmt_suite != WPA_KEY_MGMT_NONE ||
2177 params->pairwise_suite != WPA_CIPHER_NONE ||
2178 params->group_suite != WPA_CIPHER_NONE ||
2179 (params->wpa_proto & (WPA_PROTO_RSN | WPA_PROTO_WPA));
2180 if (wpa_driver_wext_set_auth_param(drv,
2181 IW_AUTH_PRIVACY_INVOKED, value) < 0)
2182 ret = -1;
2183
2184 /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2185 * not using WPA. IEEE 802.1X specifies that these frames are not
2186 * encrypted, but WPA encrypts them when pairwise keys are in use. */
2187 if (params->key_mgmt_suite == WPA_KEY_MGMT_IEEE8021X ||
2188 params->key_mgmt_suite == WPA_KEY_MGMT_PSK)
2189 allow_unencrypted_eapol = 0;
2190 else
2191 allow_unencrypted_eapol = 1;
2192
2193 if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
2194 ret = -1;
2195 if (wpa_driver_wext_set_auth_param(drv,
2196 IW_AUTH_RX_UNENCRYPTED_EAPOL,
2197 allow_unencrypted_eapol) < 0)
2198 ret = -1;
2199 switch (params->mgmt_frame_protection) {
2200 case NO_MGMT_FRAME_PROTECTION:
2201 value = IW_AUTH_MFP_DISABLED;
2202 break;
2203 case MGMT_FRAME_PROTECTION_OPTIONAL:
2204 value = IW_AUTH_MFP_OPTIONAL;
2205 break;
2206 case MGMT_FRAME_PROTECTION_REQUIRED:
2207 value = IW_AUTH_MFP_REQUIRED;
2208 break;
2209 };
2210 if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
2211 ret = -1;
2212 if (params->freq.freq &&
2213 wpa_driver_wext_set_freq(drv, params->freq.freq) < 0)
2214 ret = -1;
2215 if (!drv->cfg80211 &&
2216 wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2217 ret = -1;
2218 if (params->bssid &&
2219 wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
2220 ret = -1;
2221 if (drv->cfg80211 &&
2222 wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
2223 ret = -1;
2224
2225 return ret;
2226 }
2227
2228
wpa_driver_wext_set_auth_alg(void * priv,int auth_alg)2229 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2230 {
2231 struct wpa_driver_wext_data *drv = priv;
2232 int algs = 0, res;
2233
2234 if (auth_alg & WPA_AUTH_ALG_OPEN)
2235 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2236 if (auth_alg & WPA_AUTH_ALG_SHARED)
2237 algs |= IW_AUTH_ALG_SHARED_KEY;
2238 if (auth_alg & WPA_AUTH_ALG_LEAP)
2239 algs |= IW_AUTH_ALG_LEAP;
2240 if (algs == 0) {
2241 /* at least one algorithm should be set */
2242 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2243 }
2244
2245 res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2246 algs);
2247 drv->auth_alg_fallback = res == -2;
2248 return res;
2249 }
2250
2251
2252 /**
2253 * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2254 * @priv: Pointer to private wext data from wpa_driver_wext_init()
2255 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2256 * Returns: 0 on success, -1 on failure
2257 */
wpa_driver_wext_set_mode(void * priv,int mode)2258 int wpa_driver_wext_set_mode(void *priv, int mode)
2259 {
2260 struct wpa_driver_wext_data *drv = priv;
2261 struct iwreq iwr;
2262 int ret = -1;
2263 unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2264
2265 os_memset(&iwr, 0, sizeof(iwr));
2266 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2267 iwr.u.mode = new_mode;
2268 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2269 ret = 0;
2270 goto done;
2271 }
2272
2273 if (errno != EBUSY) {
2274 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMODE]: %s",
2275 strerror(errno));
2276 goto done;
2277 }
2278
2279 /* mac80211 doesn't allow mode changes while the device is up, so if
2280 * the device isn't in the mode we're about to change to, take device
2281 * down, try to set the mode again, and bring it back up.
2282 */
2283 if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2284 wpa_printf(MSG_ERROR, "ioctl[SIOCGIWMODE]: %s",
2285 strerror(errno));
2286 goto done;
2287 }
2288
2289 if (iwr.u.mode == new_mode) {
2290 ret = 0;
2291 goto done;
2292 }
2293
2294 if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0) == 0) {
2295 /* Try to set the mode again while the interface is down */
2296 iwr.u.mode = new_mode;
2297 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2298 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWMODE]: %s",
2299 strerror(errno));
2300 else
2301 ret = 0;
2302
2303 (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1);
2304 }
2305
2306 done:
2307 return ret;
2308 }
2309
2310
wpa_driver_wext_pmksa(struct wpa_driver_wext_data * drv,u32 cmd,const u8 * bssid,const u8 * pmkid)2311 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2312 u32 cmd, const u8 *bssid, const u8 *pmkid)
2313 {
2314 struct iwreq iwr;
2315 struct iw_pmksa pmksa;
2316 int ret = 0;
2317
2318 os_memset(&iwr, 0, sizeof(iwr));
2319 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2320 os_memset(&pmksa, 0, sizeof(pmksa));
2321 pmksa.cmd = cmd;
2322 pmksa.bssid.sa_family = ARPHRD_ETHER;
2323 if (bssid)
2324 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2325 if (pmkid)
2326 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2327 iwr.u.data.pointer = (caddr_t) &pmksa;
2328 iwr.u.data.length = sizeof(pmksa);
2329
2330 if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2331 if (errno != EOPNOTSUPP)
2332 wpa_printf(MSG_ERROR, "ioctl[SIOCSIWPMKSA]: %s",
2333 strerror(errno));
2334 ret = -1;
2335 }
2336
2337 return ret;
2338 }
2339
2340
wpa_driver_wext_add_pmkid(void * priv,struct wpa_pmkid_params * params)2341 static int wpa_driver_wext_add_pmkid(void *priv,
2342 struct wpa_pmkid_params *params)
2343 {
2344 struct wpa_driver_wext_data *drv = priv;
2345 return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, params->bssid,
2346 params->pmkid);
2347 }
2348
2349
wpa_driver_wext_remove_pmkid(void * priv,struct wpa_pmkid_params * params)2350 static int wpa_driver_wext_remove_pmkid(void *priv,
2351 struct wpa_pmkid_params *params)
2352 {
2353 struct wpa_driver_wext_data *drv = priv;
2354 return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, params->bssid,
2355 params->pmkid);
2356 }
2357
2358
wpa_driver_wext_flush_pmkid(void * priv)2359 static int wpa_driver_wext_flush_pmkid(void *priv)
2360 {
2361 struct wpa_driver_wext_data *drv = priv;
2362 return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2363 }
2364
2365
wpa_driver_wext_get_capa(void * priv,struct wpa_driver_capa * capa)2366 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2367 {
2368 struct wpa_driver_wext_data *drv = priv;
2369 if (!drv->has_capability)
2370 return -1;
2371 os_memcpy(capa, &drv->capa, sizeof(*capa));
2372 return 0;
2373 }
2374
2375
wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data * drv,const char * ifname)2376 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2377 const char *ifname)
2378 {
2379 if (ifname == NULL) {
2380 drv->ifindex2 = -1;
2381 return 0;
2382 }
2383
2384 drv->ifindex2 = if_nametoindex(ifname);
2385 if (drv->ifindex2 <= 0)
2386 return -1;
2387
2388 wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2389 "wireless events", drv->ifindex2, ifname);
2390
2391 return 0;
2392 }
2393
2394
wpa_driver_wext_set_operstate(void * priv,int state)2395 int wpa_driver_wext_set_operstate(void *priv, int state)
2396 {
2397 struct wpa_driver_wext_data *drv = priv;
2398
2399 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2400 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2401 drv->operstate = state;
2402 return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
2403 state ? IF_OPER_UP : IF_OPER_DORMANT);
2404 }
2405
2406
wpa_driver_wext_get_version(struct wpa_driver_wext_data * drv)2407 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2408 {
2409 return drv->we_version_compiled;
2410 }
2411
2412
wext_get_radio_name(void * priv)2413 static const char * wext_get_radio_name(void *priv)
2414 {
2415 struct wpa_driver_wext_data *drv = priv;
2416 return drv->phyname;
2417 }
2418
2419
wpa_driver_wext_signal_poll(void * priv,struct wpa_signal_info * si)2420 static int wpa_driver_wext_signal_poll(void *priv, struct wpa_signal_info *si)
2421 {
2422 struct wpa_driver_wext_data *drv = priv;
2423 struct iw_statistics stats;
2424 struct iwreq iwr;
2425
2426 os_memset(si, 0, sizeof(*si));
2427 si->current_signal = -WPA_INVALID_NOISE;
2428 si->current_noise = WPA_INVALID_NOISE;
2429 si->chanwidth = CHAN_WIDTH_UNKNOWN;
2430
2431 os_memset(&iwr, 0, sizeof(iwr));
2432 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2433 iwr.u.data.pointer = (caddr_t) &stats;
2434 iwr.u.data.length = sizeof(stats);
2435 iwr.u.data.flags = 1;
2436
2437 if (ioctl(drv->ioctl_sock, SIOCGIWSTATS, &iwr) < 0) {
2438 wpa_printf(MSG_ERROR, "WEXT: SIOCGIWSTATS: %s",
2439 strerror(errno));
2440 return -1;
2441 }
2442
2443 si->current_signal = stats.qual.level -
2444 ((stats.qual.updated & IW_QUAL_DBM) ? 0x100 : 0);
2445 si->current_noise = stats.qual.noise -
2446 ((stats.qual.updated & IW_QUAL_DBM) ? 0x100 : 0);
2447 return 0;
2448 }
2449
2450
wpa_driver_wext_status(void * priv,char * buf,size_t buflen)2451 static int wpa_driver_wext_status(void *priv, char *buf, size_t buflen)
2452 {
2453 struct wpa_driver_wext_data *drv = priv;
2454 int res;
2455 char *pos, *end;
2456 unsigned char addr[ETH_ALEN];
2457
2458 pos = buf;
2459 end = buf + buflen;
2460
2461 if (linux_get_ifhwaddr(drv->ioctl_sock, drv->ifname, addr))
2462 return -1;
2463
2464 res = os_snprintf(pos, end - pos,
2465 "ifindex=%d\n"
2466 "ifname=%s\n"
2467 "addr=" MACSTR "\n",
2468 drv->ifindex,
2469 drv->ifname,
2470 MAC2STR(addr));
2471 if (os_snprintf_error(end - pos, res))
2472 return pos - buf;
2473 pos += res;
2474
2475 return pos - buf;
2476 }
2477
2478 const struct wpa_driver_ops wpa_driver_wext_ops = {
2479 .name = "wext",
2480 .desc = "Linux wireless extensions (generic)",
2481 .get_bssid = wpa_driver_wext_get_bssid,
2482 .get_ssid = wpa_driver_wext_get_ssid,
2483 .set_key = wpa_driver_wext_set_key,
2484 .set_countermeasures = wpa_driver_wext_set_countermeasures,
2485 .scan2 = wpa_driver_wext_scan,
2486 .get_scan_results2 = wpa_driver_wext_get_scan_results,
2487 .deauthenticate = wpa_driver_wext_deauthenticate,
2488 .associate = wpa_driver_wext_associate,
2489 .init = wpa_driver_wext_init,
2490 .deinit = wpa_driver_wext_deinit,
2491 .add_pmkid = wpa_driver_wext_add_pmkid,
2492 .remove_pmkid = wpa_driver_wext_remove_pmkid,
2493 .flush_pmkid = wpa_driver_wext_flush_pmkid,
2494 .get_capa = wpa_driver_wext_get_capa,
2495 .set_operstate = wpa_driver_wext_set_operstate,
2496 .get_radio_name = wext_get_radio_name,
2497 .signal_poll = wpa_driver_wext_signal_poll,
2498 .status = wpa_driver_wext_status,
2499 };
2500
