1 /*
2 * Driver interaction with generic Linux Wireless Extensions
3 * Copyright (c) 2003-2010, 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
22 #include "linux_wext.h"
23 #include "common.h"
24 #include "eloop.h"
25 #include "common/ieee802_11_defs.h"
26 #include "common/wpa_common.h"
27 #include "priv_netlink.h"
28 #include "netlink.h"
29 #include "linux_ioctl.h"
30 #include "rfkill.h"
31 #include "driver.h"
32 #include "driver_wext.h"
33
34 static int wpa_driver_wext_flush_pmkid(void *priv);
35 static int wpa_driver_wext_get_range(void *priv);
36 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv);
37 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv);
38 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg);
39
40
wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data * drv,int idx,u32 value)41 int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
42 int idx, u32 value)
43 {
44 struct iwreq iwr;
45 int ret = 0;
46
47 os_memset(&iwr, 0, sizeof(iwr));
48 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
49 iwr.u.param.flags = idx & IW_AUTH_INDEX;
50 iwr.u.param.value = value;
51
52 if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
53 if (errno != EOPNOTSUPP) {
54 wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
55 "value 0x%x) failed: %s)",
56 idx, value, strerror(errno));
57 }
58 ret = errno == EOPNOTSUPP ? -2 : -1;
59 }
60
61 return ret;
62 }
63
64
65 /**
66 * wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
67 * @priv: Pointer to private wext data from wpa_driver_wext_init()
68 * @bssid: Buffer for BSSID
69 * Returns: 0 on success, -1 on failure
70 */
wpa_driver_wext_get_bssid(void * priv,u8 * bssid)71 int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
72 {
73 struct wpa_driver_wext_data *drv = priv;
74 struct iwreq iwr;
75 int ret = 0;
76
77 os_memset(&iwr, 0, sizeof(iwr));
78 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
79
80 if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
81 perror("ioctl[SIOCGIWAP]");
82 ret = -1;
83 }
84 os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
85
86 return ret;
87 }
88
89
90 /**
91 * wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
92 * @priv: Pointer to private wext data from wpa_driver_wext_init()
93 * @bssid: BSSID
94 * Returns: 0 on success, -1 on failure
95 */
wpa_driver_wext_set_bssid(void * priv,const u8 * bssid)96 int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
97 {
98 struct wpa_driver_wext_data *drv = priv;
99 struct iwreq iwr;
100 int ret = 0;
101
102 os_memset(&iwr, 0, sizeof(iwr));
103 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
104 iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
105 if (bssid)
106 os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
107 else
108 os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
109
110 if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
111 perror("ioctl[SIOCSIWAP]");
112 ret = -1;
113 }
114
115 return ret;
116 }
117
118
119 /**
120 * wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
121 * @priv: Pointer to private wext data from wpa_driver_wext_init()
122 * @ssid: Buffer for the SSID; must be at least 32 bytes long
123 * Returns: SSID length on success, -1 on failure
124 */
wpa_driver_wext_get_ssid(void * priv,u8 * ssid)125 int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
126 {
127 struct wpa_driver_wext_data *drv = priv;
128 struct iwreq iwr;
129 int ret = 0;
130
131 os_memset(&iwr, 0, sizeof(iwr));
132 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
133 iwr.u.essid.pointer = (caddr_t) ssid;
134 iwr.u.essid.length = 32;
135
136 if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
137 perror("ioctl[SIOCGIWESSID]");
138 ret = -1;
139 } else {
140 ret = iwr.u.essid.length;
141 if (ret > 32)
142 ret = 32;
143 /* Some drivers include nul termination in the SSID, so let's
144 * remove it here before further processing. WE-21 changes this
145 * to explicitly require the length _not_ to include nul
146 * termination. */
147 if (ret > 0 && ssid[ret - 1] == '\0' &&
148 drv->we_version_compiled < 21)
149 ret--;
150 }
151
152 return ret;
153 }
154
155
156 /**
157 * wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
158 * @priv: Pointer to private wext data from wpa_driver_wext_init()
159 * @ssid: SSID
160 * @ssid_len: Length of SSID (0..32)
161 * Returns: 0 on success, -1 on failure
162 */
wpa_driver_wext_set_ssid(void * priv,const u8 * ssid,size_t ssid_len)163 int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
164 {
165 struct wpa_driver_wext_data *drv = priv;
166 struct iwreq iwr;
167 int ret = 0;
168 char buf[33];
169
170 if (ssid_len > 32)
171 return -1;
172
173 os_memset(&iwr, 0, sizeof(iwr));
174 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
175 /* flags: 1 = ESSID is active, 0 = not (promiscuous) */
176 iwr.u.essid.flags = (ssid_len != 0);
177 os_memset(buf, 0, sizeof(buf));
178 os_memcpy(buf, ssid, ssid_len);
179 iwr.u.essid.pointer = (caddr_t) buf;
180 if (drv->we_version_compiled < 21) {
181 /* For historic reasons, set SSID length to include one extra
182 * character, C string nul termination, even though SSID is
183 * really an octet string that should not be presented as a C
184 * string. Some Linux drivers decrement the length by one and
185 * can thus end up missing the last octet of the SSID if the
186 * length is not incremented here. WE-21 changes this to
187 * explicitly require the length _not_ to include nul
188 * termination. */
189 if (ssid_len)
190 ssid_len++;
191 }
192 iwr.u.essid.length = ssid_len;
193
194 if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
195 perror("ioctl[SIOCSIWESSID]");
196 ret = -1;
197 }
198
199 return ret;
200 }
201
202
203 /**
204 * wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
205 * @priv: Pointer to private wext data from wpa_driver_wext_init()
206 * @freq: Frequency in MHz
207 * Returns: 0 on success, -1 on failure
208 */
wpa_driver_wext_set_freq(void * priv,int freq)209 int wpa_driver_wext_set_freq(void *priv, int freq)
210 {
211 struct wpa_driver_wext_data *drv = priv;
212 struct iwreq iwr;
213 int ret = 0;
214
215 os_memset(&iwr, 0, sizeof(iwr));
216 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
217 iwr.u.freq.m = freq * 100000;
218 iwr.u.freq.e = 1;
219
220 if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
221 perror("ioctl[SIOCSIWFREQ]");
222 ret = -1;
223 }
224
225 return ret;
226 }
227
228
229 static void
wpa_driver_wext_event_wireless_custom(void * ctx,char * custom)230 wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
231 {
232 union wpa_event_data data;
233
234 wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
235 custom);
236
237 os_memset(&data, 0, sizeof(data));
238 /* Host AP driver */
239 if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
240 data.michael_mic_failure.unicast =
241 os_strstr(custom, " unicast ") != NULL;
242 /* TODO: parse parameters(?) */
243 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
244 } else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
245 char *spos;
246 int bytes;
247 u8 *req_ies = NULL, *resp_ies = NULL;
248
249 spos = custom + 17;
250
251 bytes = strspn(spos, "0123456789abcdefABCDEF");
252 if (!bytes || (bytes & 1))
253 return;
254 bytes /= 2;
255
256 req_ies = os_malloc(bytes);
257 if (req_ies == NULL ||
258 hexstr2bin(spos, req_ies, bytes) < 0)
259 goto done;
260 data.assoc_info.req_ies = req_ies;
261 data.assoc_info.req_ies_len = bytes;
262
263 spos += bytes * 2;
264
265 data.assoc_info.resp_ies = NULL;
266 data.assoc_info.resp_ies_len = 0;
267
268 if (os_strncmp(spos, " RespIEs=", 9) == 0) {
269 spos += 9;
270
271 bytes = strspn(spos, "0123456789abcdefABCDEF");
272 if (!bytes || (bytes & 1))
273 goto done;
274 bytes /= 2;
275
276 resp_ies = os_malloc(bytes);
277 if (resp_ies == NULL ||
278 hexstr2bin(spos, resp_ies, bytes) < 0)
279 goto done;
280 data.assoc_info.resp_ies = resp_ies;
281 data.assoc_info.resp_ies_len = bytes;
282 }
283
284 wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
285
286 done:
287 os_free(resp_ies);
288 os_free(req_ies);
289 #ifdef CONFIG_PEERKEY
290 } else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
291 if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
292 wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
293 "STKSTART.request '%s'", custom + 17);
294 return;
295 }
296 wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
297 #endif /* CONFIG_PEERKEY */
298 }
299 }
300
301
wpa_driver_wext_event_wireless_michaelmicfailure(void * ctx,const char * ev,size_t len)302 static int wpa_driver_wext_event_wireless_michaelmicfailure(
303 void *ctx, const char *ev, size_t len)
304 {
305 const struct iw_michaelmicfailure *mic;
306 union wpa_event_data data;
307
308 if (len < sizeof(*mic))
309 return -1;
310
311 mic = (const struct iw_michaelmicfailure *) ev;
312
313 wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
314 "flags=0x%x src_addr=" MACSTR, mic->flags,
315 MAC2STR(mic->src_addr.sa_data));
316
317 os_memset(&data, 0, sizeof(data));
318 data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
319 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
320
321 return 0;
322 }
323
324
wpa_driver_wext_event_wireless_pmkidcand(struct wpa_driver_wext_data * drv,const char * ev,size_t len)325 static int wpa_driver_wext_event_wireless_pmkidcand(
326 struct wpa_driver_wext_data *drv, const char *ev, size_t len)
327 {
328 const struct iw_pmkid_cand *cand;
329 union wpa_event_data data;
330 const u8 *addr;
331
332 if (len < sizeof(*cand))
333 return -1;
334
335 cand = (const struct iw_pmkid_cand *) ev;
336 addr = (const u8 *) cand->bssid.sa_data;
337
338 wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
339 "flags=0x%x index=%d bssid=" MACSTR, cand->flags,
340 cand->index, MAC2STR(addr));
341
342 os_memset(&data, 0, sizeof(data));
343 os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
344 data.pmkid_candidate.index = cand->index;
345 data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
346 wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
347
348 return 0;
349 }
350
351
wpa_driver_wext_event_wireless_assocreqie(struct wpa_driver_wext_data * drv,const char * ev,int len)352 static int wpa_driver_wext_event_wireless_assocreqie(
353 struct wpa_driver_wext_data *drv, const char *ev, int len)
354 {
355 if (len < 0)
356 return -1;
357
358 wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
359 len);
360 os_free(drv->assoc_req_ies);
361 drv->assoc_req_ies = os_malloc(len);
362 if (drv->assoc_req_ies == NULL) {
363 drv->assoc_req_ies_len = 0;
364 return -1;
365 }
366 os_memcpy(drv->assoc_req_ies, ev, len);
367 drv->assoc_req_ies_len = len;
368
369 return 0;
370 }
371
372
wpa_driver_wext_event_wireless_assocrespie(struct wpa_driver_wext_data * drv,const char * ev,int len)373 static int wpa_driver_wext_event_wireless_assocrespie(
374 struct wpa_driver_wext_data *drv, const char *ev, int len)
375 {
376 if (len < 0)
377 return -1;
378
379 wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
380 len);
381 os_free(drv->assoc_resp_ies);
382 drv->assoc_resp_ies = os_malloc(len);
383 if (drv->assoc_resp_ies == NULL) {
384 drv->assoc_resp_ies_len = 0;
385 return -1;
386 }
387 os_memcpy(drv->assoc_resp_ies, ev, len);
388 drv->assoc_resp_ies_len = len;
389
390 return 0;
391 }
392
393
wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data * drv)394 static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
395 {
396 union wpa_event_data data;
397
398 if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
399 return;
400
401 os_memset(&data, 0, sizeof(data));
402 if (drv->assoc_req_ies) {
403 data.assoc_info.req_ies = drv->assoc_req_ies;
404 data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
405 }
406 if (drv->assoc_resp_ies) {
407 data.assoc_info.resp_ies = drv->assoc_resp_ies;
408 data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
409 }
410
411 wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
412
413 os_free(drv->assoc_req_ies);
414 drv->assoc_req_ies = NULL;
415 os_free(drv->assoc_resp_ies);
416 drv->assoc_resp_ies = NULL;
417 }
418
419
wpa_driver_wext_event_wireless(struct wpa_driver_wext_data * drv,char * data,int len)420 static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
421 char *data, int len)
422 {
423 struct iw_event iwe_buf, *iwe = &iwe_buf;
424 char *pos, *end, *custom, *buf;
425
426 pos = data;
427 end = data + len;
428
429 while (pos + IW_EV_LCP_LEN <= end) {
430 /* Event data may be unaligned, so make a local, aligned copy
431 * before processing. */
432 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
433 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
434 iwe->cmd, iwe->len);
435 if (iwe->len <= IW_EV_LCP_LEN)
436 return;
437
438 custom = pos + IW_EV_POINT_LEN;
439 if (drv->we_version_compiled > 18 &&
440 (iwe->cmd == IWEVMICHAELMICFAILURE ||
441 iwe->cmd == IWEVCUSTOM ||
442 iwe->cmd == IWEVASSOCREQIE ||
443 iwe->cmd == IWEVASSOCRESPIE ||
444 iwe->cmd == IWEVPMKIDCAND)) {
445 /* WE-19 removed the pointer from struct iw_point */
446 char *dpos = (char *) &iwe_buf.u.data.length;
447 int dlen = dpos - (char *) &iwe_buf;
448 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
449 sizeof(struct iw_event) - dlen);
450 } else {
451 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
452 custom += IW_EV_POINT_OFF;
453 }
454
455 switch (iwe->cmd) {
456 case SIOCGIWAP:
457 wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
458 MACSTR,
459 MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
460 if (is_zero_ether_addr(
461 (const u8 *) iwe->u.ap_addr.sa_data) ||
462 os_memcmp(iwe->u.ap_addr.sa_data,
463 "\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
464 0) {
465 os_free(drv->assoc_req_ies);
466 drv->assoc_req_ies = NULL;
467 os_free(drv->assoc_resp_ies);
468 drv->assoc_resp_ies = NULL;
469 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC,
470 NULL);
471
472 } else {
473 wpa_driver_wext_event_assoc_ies(drv);
474 wpa_supplicant_event(drv->ctx, EVENT_ASSOC,
475 NULL);
476 }
477 break;
478 case IWEVMICHAELMICFAILURE:
479 if (custom + iwe->u.data.length > end) {
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 (custom + iwe->u.data.length > end) {
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 (custom + iwe->u.data.length > end) {
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 (custom + iwe->u.data.length > end) {
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 (custom + iwe->u.data.length > end) {
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 perror("socket(PF_INET,SOCK_DGRAM)");
819 goto err1;
820 }
821
822 cfg = os_zalloc(sizeof(*cfg));
823 if (cfg == NULL)
824 goto err1;
825 cfg->ctx = drv;
826 cfg->newlink_cb = wpa_driver_wext_event_rtm_newlink;
827 cfg->dellink_cb = wpa_driver_wext_event_rtm_dellink;
828 drv->netlink = netlink_init(cfg);
829 if (drv->netlink == NULL) {
830 os_free(cfg);
831 goto err2;
832 }
833
834 rcfg = os_zalloc(sizeof(*rcfg));
835 if (rcfg == NULL)
836 goto err3;
837 rcfg->ctx = drv;
838 os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
839 rcfg->blocked_cb = wpa_driver_wext_rfkill_blocked;
840 rcfg->unblocked_cb = wpa_driver_wext_rfkill_unblocked;
841 drv->rfkill = rfkill_init(rcfg);
842 if (drv->rfkill == NULL) {
843 wpa_printf(MSG_DEBUG, "WEXT: RFKILL status not available");
844 os_free(rcfg);
845 }
846
847 drv->mlme_sock = -1;
848
849 if (wpa_driver_wext_finish_drv_init(drv) < 0)
850 goto err3;
851
852 wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 1);
853
854 return drv;
855
856 err3:
857 rfkill_deinit(drv->rfkill);
858 netlink_deinit(drv->netlink);
859 err2:
860 close(drv->ioctl_sock);
861 err1:
862 os_free(drv);
863 return NULL;
864 }
865
866
wpa_driver_wext_send_rfkill(void * eloop_ctx,void * timeout_ctx)867 static void wpa_driver_wext_send_rfkill(void *eloop_ctx, void *timeout_ctx)
868 {
869 wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
870 }
871
872
wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data * drv)873 static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
874 {
875 int send_rfkill_event = 0;
876
877 if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1) < 0) {
878 if (rfkill_is_blocked(drv->rfkill)) {
879 wpa_printf(MSG_DEBUG, "WEXT: Could not yet enable "
880 "interface '%s' due to rfkill",
881 drv->ifname);
882 drv->if_disabled = 1;
883 send_rfkill_event = 1;
884 } else {
885 wpa_printf(MSG_ERROR, "WEXT: Could not set "
886 "interface '%s' UP", drv->ifname);
887 return -1;
888 }
889 }
890
891 /*
892 * Make sure that the driver does not have any obsolete PMKID entries.
893 */
894 wpa_driver_wext_flush_pmkid(drv);
895
896 if (wpa_driver_wext_set_mode(drv, 0) < 0) {
897 wpa_printf(MSG_DEBUG, "Could not configure driver to use "
898 "managed mode");
899 /* Try to use it anyway */
900 }
901
902 wpa_driver_wext_get_range(drv);
903
904 /*
905 * Unlock the driver's BSSID and force to a random SSID to clear any
906 * previous association the driver might have when the supplicant
907 * starts up.
908 */
909 wpa_driver_wext_disconnect(drv);
910
911 drv->ifindex = if_nametoindex(drv->ifname);
912
913 if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
914 /*
915 * Host AP driver may use both wlan# and wifi# interface in
916 * wireless events. Since some of the versions included WE-18
917 * support, let's add the alternative ifindex also from
918 * driver_wext.c for the time being. This may be removed at
919 * some point once it is believed that old versions of the
920 * driver are not in use anymore.
921 */
922 char ifname2[IFNAMSIZ + 1];
923 os_strlcpy(ifname2, drv->ifname, sizeof(ifname2));
924 os_memcpy(ifname2, "wifi", 4);
925 wpa_driver_wext_alternative_ifindex(drv, ifname2);
926 }
927
928 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
929 1, IF_OPER_DORMANT);
930
931 if (send_rfkill_event) {
932 eloop_register_timeout(0, 0, wpa_driver_wext_send_rfkill,
933 drv, drv->ctx);
934 }
935
936 return 0;
937 }
938
939
940 /**
941 * wpa_driver_wext_deinit - Deinitialize WE driver interface
942 * @priv: Pointer to private wext data from wpa_driver_wext_init()
943 *
944 * Shut down driver interface and processing of driver events. Free
945 * private data buffer if one was allocated in wpa_driver_wext_init().
946 */
wpa_driver_wext_deinit(void * priv)947 void wpa_driver_wext_deinit(void *priv)
948 {
949 struct wpa_driver_wext_data *drv = priv;
950
951 wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 0);
952
953 eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
954
955 /*
956 * Clear possibly configured driver parameters in order to make it
957 * easier to use the driver after wpa_supplicant has been terminated.
958 */
959 wpa_driver_wext_disconnect(drv);
960
961 netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
962 netlink_deinit(drv->netlink);
963 rfkill_deinit(drv->rfkill);
964
965 if (drv->mlme_sock >= 0)
966 eloop_unregister_read_sock(drv->mlme_sock);
967
968 (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0);
969
970 close(drv->ioctl_sock);
971 if (drv->mlme_sock >= 0)
972 close(drv->mlme_sock);
973 os_free(drv->assoc_req_ies);
974 os_free(drv->assoc_resp_ies);
975 os_free(drv);
976 }
977
978
979 /**
980 * wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
981 * @eloop_ctx: Unused
982 * @timeout_ctx: ctx argument given to wpa_driver_wext_init()
983 *
984 * This function can be used as registered timeout when starting a scan to
985 * generate a scan completed event if the driver does not report this.
986 */
wpa_driver_wext_scan_timeout(void * eloop_ctx,void * timeout_ctx)987 void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
988 {
989 wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
990 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
991 }
992
993
994 /**
995 * wpa_driver_wext_scan - Request the driver to initiate scan
996 * @priv: Pointer to private wext data from wpa_driver_wext_init()
997 * @param: Scan parameters (specific SSID to scan for (ProbeReq), etc.)
998 * Returns: 0 on success, -1 on failure
999 */
wpa_driver_wext_scan(void * priv,struct wpa_driver_scan_params * params)1000 int wpa_driver_wext_scan(void *priv, struct wpa_driver_scan_params *params)
1001 {
1002 struct wpa_driver_wext_data *drv = priv;
1003 struct iwreq iwr;
1004 int ret = 0, timeout;
1005 struct iw_scan_req req;
1006 const u8 *ssid = params->ssids[0].ssid;
1007 size_t ssid_len = params->ssids[0].ssid_len;
1008
1009 if (ssid_len > IW_ESSID_MAX_SIZE) {
1010 wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
1011 __FUNCTION__, (unsigned long) ssid_len);
1012 return -1;
1013 }
1014
1015 os_memset(&iwr, 0, sizeof(iwr));
1016 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1017
1018 if (ssid && ssid_len) {
1019 os_memset(&req, 0, sizeof(req));
1020 req.essid_len = ssid_len;
1021 req.bssid.sa_family = ARPHRD_ETHER;
1022 os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
1023 os_memcpy(req.essid, ssid, ssid_len);
1024 iwr.u.data.pointer = (caddr_t) &req;
1025 iwr.u.data.length = sizeof(req);
1026 iwr.u.data.flags = IW_SCAN_THIS_ESSID;
1027 }
1028
1029 if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
1030 perror("ioctl[SIOCSIWSCAN]");
1031 ret = -1;
1032 }
1033
1034 /* Not all drivers generate "scan completed" wireless event, so try to
1035 * read results after a timeout. */
1036 timeout = 10;
1037 if (drv->scan_complete_events) {
1038 /*
1039 * The driver seems to deliver SIOCGIWSCAN events to notify
1040 * when scan is complete, so use longer timeout to avoid race
1041 * conditions with scanning and following association request.
1042 */
1043 timeout = 30;
1044 }
1045 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1046 "seconds", ret, timeout);
1047 eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
1048 eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
1049 drv->ctx);
1050
1051 return ret;
1052 }
1053
1054
wpa_driver_wext_giwscan(struct wpa_driver_wext_data * drv,size_t * len)1055 static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
1056 size_t *len)
1057 {
1058 struct iwreq iwr;
1059 u8 *res_buf;
1060 size_t res_buf_len;
1061
1062 res_buf_len = IW_SCAN_MAX_DATA;
1063 for (;;) {
1064 res_buf = os_malloc(res_buf_len);
1065 if (res_buf == NULL)
1066 return NULL;
1067 os_memset(&iwr, 0, sizeof(iwr));
1068 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1069 iwr.u.data.pointer = res_buf;
1070 iwr.u.data.length = res_buf_len;
1071
1072 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
1073 break;
1074
1075 if (errno == E2BIG && res_buf_len < 65535) {
1076 os_free(res_buf);
1077 res_buf = NULL;
1078 res_buf_len *= 2;
1079 if (res_buf_len > 65535)
1080 res_buf_len = 65535; /* 16-bit length field */
1081 wpa_printf(MSG_DEBUG, "Scan results did not fit - "
1082 "trying larger buffer (%lu bytes)",
1083 (unsigned long) res_buf_len);
1084 } else {
1085 perror("ioctl[SIOCGIWSCAN]");
1086 os_free(res_buf);
1087 return NULL;
1088 }
1089 }
1090
1091 if (iwr.u.data.length > res_buf_len) {
1092 os_free(res_buf);
1093 return NULL;
1094 }
1095 *len = iwr.u.data.length;
1096
1097 return res_buf;
1098 }
1099
1100
1101 /*
1102 * Data structure for collecting WEXT scan results. This is needed to allow
1103 * the various methods of reporting IEs to be combined into a single IE buffer.
1104 */
1105 struct wext_scan_data {
1106 struct wpa_scan_res res;
1107 u8 *ie;
1108 size_t ie_len;
1109 u8 ssid[32];
1110 size_t ssid_len;
1111 int maxrate;
1112 };
1113
1114
wext_get_scan_mode(struct iw_event * iwe,struct wext_scan_data * res)1115 static void wext_get_scan_mode(struct iw_event *iwe,
1116 struct wext_scan_data *res)
1117 {
1118 if (iwe->u.mode == IW_MODE_ADHOC)
1119 res->res.caps |= IEEE80211_CAP_IBSS;
1120 else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
1121 res->res.caps |= IEEE80211_CAP_ESS;
1122 }
1123
1124
wext_get_scan_ssid(struct iw_event * iwe,struct wext_scan_data * res,char * custom,char * end)1125 static void wext_get_scan_ssid(struct iw_event *iwe,
1126 struct wext_scan_data *res, char *custom,
1127 char *end)
1128 {
1129 int ssid_len = iwe->u.essid.length;
1130 if (custom + ssid_len > end)
1131 return;
1132 if (iwe->u.essid.flags &&
1133 ssid_len > 0 &&
1134 ssid_len <= IW_ESSID_MAX_SIZE) {
1135 os_memcpy(res->ssid, custom, ssid_len);
1136 res->ssid_len = ssid_len;
1137 }
1138 }
1139
1140
wext_get_scan_freq(struct iw_event * iwe,struct wext_scan_data * res)1141 static void wext_get_scan_freq(struct iw_event *iwe,
1142 struct wext_scan_data *res)
1143 {
1144 int divi = 1000000, i;
1145
1146 if (iwe->u.freq.e == 0) {
1147 /*
1148 * Some drivers do not report frequency, but a channel.
1149 * Try to map this to frequency by assuming they are using
1150 * IEEE 802.11b/g. But don't overwrite a previously parsed
1151 * frequency if the driver sends both frequency and channel,
1152 * since the driver may be sending an A-band channel that we
1153 * don't handle here.
1154 */
1155
1156 if (res->res.freq)
1157 return;
1158
1159 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
1160 res->res.freq = 2407 + 5 * iwe->u.freq.m;
1161 return;
1162 } else if (iwe->u.freq.m == 14) {
1163 res->res.freq = 2484;
1164 return;
1165 }
1166 }
1167
1168 if (iwe->u.freq.e > 6) {
1169 wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
1170 MACSTR " m=%d e=%d)",
1171 MAC2STR(res->res.bssid), iwe->u.freq.m,
1172 iwe->u.freq.e);
1173 return;
1174 }
1175
1176 for (i = 0; i < iwe->u.freq.e; i++)
1177 divi /= 10;
1178 res->res.freq = iwe->u.freq.m / divi;
1179 }
1180
1181
wext_get_scan_qual(struct wpa_driver_wext_data * drv,struct iw_event * iwe,struct wext_scan_data * res)1182 static void wext_get_scan_qual(struct wpa_driver_wext_data *drv,
1183 struct iw_event *iwe,
1184 struct wext_scan_data *res)
1185 {
1186 res->res.qual = iwe->u.qual.qual;
1187 res->res.noise = iwe->u.qual.noise;
1188 res->res.level = iwe->u.qual.level;
1189 if (iwe->u.qual.updated & IW_QUAL_QUAL_INVALID)
1190 res->res.flags |= WPA_SCAN_QUAL_INVALID;
1191 if (iwe->u.qual.updated & IW_QUAL_LEVEL_INVALID)
1192 res->res.flags |= WPA_SCAN_LEVEL_INVALID;
1193 if (iwe->u.qual.updated & IW_QUAL_NOISE_INVALID)
1194 res->res.flags |= WPA_SCAN_NOISE_INVALID;
1195 if (iwe->u.qual.updated & IW_QUAL_DBM)
1196 res->res.flags |= WPA_SCAN_LEVEL_DBM;
1197 if ((iwe->u.qual.updated & IW_QUAL_DBM) ||
1198 ((iwe->u.qual.level != 0) &&
1199 (iwe->u.qual.level > drv->max_level))) {
1200 if (iwe->u.qual.level >= 64)
1201 res->res.level -= 0x100;
1202 if (iwe->u.qual.noise >= 64)
1203 res->res.noise -= 0x100;
1204 }
1205 }
1206
1207
wext_get_scan_encode(struct iw_event * iwe,struct wext_scan_data * res)1208 static void wext_get_scan_encode(struct iw_event *iwe,
1209 struct wext_scan_data *res)
1210 {
1211 if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
1212 res->res.caps |= IEEE80211_CAP_PRIVACY;
1213 }
1214
1215
wext_get_scan_rate(struct iw_event * iwe,struct wext_scan_data * res,char * pos,char * end)1216 static void wext_get_scan_rate(struct iw_event *iwe,
1217 struct wext_scan_data *res, char *pos,
1218 char *end)
1219 {
1220 int maxrate;
1221 char *custom = pos + IW_EV_LCP_LEN;
1222 struct iw_param p;
1223 size_t clen;
1224
1225 clen = iwe->len;
1226 if (custom + clen > end)
1227 return;
1228 maxrate = 0;
1229 while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
1230 /* Note: may be misaligned, make a local, aligned copy */
1231 os_memcpy(&p, custom, sizeof(struct iw_param));
1232 if (p.value > maxrate)
1233 maxrate = p.value;
1234 clen -= sizeof(struct iw_param);
1235 custom += sizeof(struct iw_param);
1236 }
1237
1238 /* Convert the maxrate from WE-style (b/s units) to
1239 * 802.11 rates (500000 b/s units).
1240 */
1241 res->maxrate = maxrate / 500000;
1242 }
1243
1244
wext_get_scan_iwevgenie(struct iw_event * iwe,struct wext_scan_data * res,char * custom,char * end)1245 static void wext_get_scan_iwevgenie(struct iw_event *iwe,
1246 struct wext_scan_data *res, char *custom,
1247 char *end)
1248 {
1249 char *genie, *gpos, *gend;
1250 u8 *tmp;
1251
1252 if (iwe->u.data.length == 0)
1253 return;
1254
1255 gpos = genie = custom;
1256 gend = genie + iwe->u.data.length;
1257 if (gend > end) {
1258 wpa_printf(MSG_INFO, "IWEVGENIE overflow");
1259 return;
1260 }
1261
1262 tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
1263 if (tmp == NULL)
1264 return;
1265 os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
1266 res->ie = tmp;
1267 res->ie_len += gend - gpos;
1268 }
1269
1270
wext_get_scan_custom(struct iw_event * iwe,struct wext_scan_data * res,char * custom,char * end)1271 static void wext_get_scan_custom(struct iw_event *iwe,
1272 struct wext_scan_data *res, char *custom,
1273 char *end)
1274 {
1275 size_t clen;
1276 u8 *tmp;
1277
1278 clen = iwe->u.data.length;
1279 if (custom + clen > end)
1280 return;
1281
1282 if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
1283 char *spos;
1284 int bytes;
1285 spos = custom + 7;
1286 bytes = custom + clen - spos;
1287 if (bytes & 1 || bytes == 0)
1288 return;
1289 bytes /= 2;
1290 tmp = os_realloc(res->ie, res->ie_len + bytes);
1291 if (tmp == NULL)
1292 return;
1293 res->ie = tmp;
1294 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1295 return;
1296 res->ie_len += bytes;
1297 } else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
1298 char *spos;
1299 int bytes;
1300 spos = custom + 7;
1301 bytes = custom + clen - spos;
1302 if (bytes & 1 || bytes == 0)
1303 return;
1304 bytes /= 2;
1305 tmp = os_realloc(res->ie, res->ie_len + bytes);
1306 if (tmp == NULL)
1307 return;
1308 res->ie = tmp;
1309 if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
1310 return;
1311 res->ie_len += bytes;
1312 } else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
1313 char *spos;
1314 int bytes;
1315 u8 bin[8];
1316 spos = custom + 4;
1317 bytes = custom + clen - spos;
1318 if (bytes != 16) {
1319 wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
1320 return;
1321 }
1322 bytes /= 2;
1323 if (hexstr2bin(spos, bin, bytes) < 0) {
1324 wpa_printf(MSG_DEBUG, "WEXT: Invalid TSF value");
1325 return;
1326 }
1327 res->res.tsf += WPA_GET_BE64(bin);
1328 }
1329 }
1330
1331
wext_19_iw_point(struct wpa_driver_wext_data * drv,u16 cmd)1332 static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
1333 {
1334 return drv->we_version_compiled > 18 &&
1335 (cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
1336 cmd == IWEVGENIE || cmd == IWEVCUSTOM);
1337 }
1338
1339
wpa_driver_wext_add_scan_entry(struct wpa_scan_results * res,struct wext_scan_data * data)1340 static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
1341 struct wext_scan_data *data)
1342 {
1343 struct wpa_scan_res **tmp;
1344 struct wpa_scan_res *r;
1345 size_t extra_len;
1346 u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
1347
1348 /* Figure out whether we need to fake any IEs */
1349 pos = data->ie;
1350 end = pos + data->ie_len;
1351 while (pos && pos + 1 < end) {
1352 if (pos + 2 + pos[1] > end)
1353 break;
1354 if (pos[0] == WLAN_EID_SSID)
1355 ssid_ie = pos;
1356 else if (pos[0] == WLAN_EID_SUPP_RATES)
1357 rate_ie = pos;
1358 else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
1359 rate_ie = pos;
1360 pos += 2 + pos[1];
1361 }
1362
1363 extra_len = 0;
1364 if (ssid_ie == NULL)
1365 extra_len += 2 + data->ssid_len;
1366 if (rate_ie == NULL && data->maxrate)
1367 extra_len += 3;
1368
1369 r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
1370 if (r == NULL)
1371 return;
1372 os_memcpy(r, &data->res, sizeof(*r));
1373 r->ie_len = extra_len + data->ie_len;
1374 pos = (u8 *) (r + 1);
1375 if (ssid_ie == NULL) {
1376 /*
1377 * Generate a fake SSID IE since the driver did not report
1378 * a full IE list.
1379 */
1380 *pos++ = WLAN_EID_SSID;
1381 *pos++ = data->ssid_len;
1382 os_memcpy(pos, data->ssid, data->ssid_len);
1383 pos += data->ssid_len;
1384 }
1385 if (rate_ie == NULL && data->maxrate) {
1386 /*
1387 * Generate a fake Supported Rates IE since the driver did not
1388 * report a full IE list.
1389 */
1390 *pos++ = WLAN_EID_SUPP_RATES;
1391 *pos++ = 1;
1392 *pos++ = data->maxrate;
1393 }
1394 if (data->ie)
1395 os_memcpy(pos, data->ie, data->ie_len);
1396
1397 tmp = os_realloc_array(res->res, res->num + 1,
1398 sizeof(struct wpa_scan_res *));
1399 if (tmp == NULL) {
1400 os_free(r);
1401 return;
1402 }
1403 tmp[res->num++] = r;
1404 res->res = tmp;
1405 }
1406
1407
1408 /**
1409 * wpa_driver_wext_get_scan_results - Fetch the latest scan results
1410 * @priv: Pointer to private wext data from wpa_driver_wext_init()
1411 * Returns: Scan results on success, -1 on failure
1412 */
wpa_driver_wext_get_scan_results(void * priv)1413 struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
1414 {
1415 struct wpa_driver_wext_data *drv = priv;
1416 size_t len;
1417 int first;
1418 u8 *res_buf;
1419 struct iw_event iwe_buf, *iwe = &iwe_buf;
1420 char *pos, *end, *custom;
1421 struct wpa_scan_results *res;
1422 struct wext_scan_data data;
1423
1424 res_buf = wpa_driver_wext_giwscan(drv, &len);
1425 if (res_buf == NULL)
1426 return NULL;
1427
1428 first = 1;
1429
1430 res = os_zalloc(sizeof(*res));
1431 if (res == NULL) {
1432 os_free(res_buf);
1433 return NULL;
1434 }
1435
1436 pos = (char *) res_buf;
1437 end = (char *) res_buf + len;
1438 os_memset(&data, 0, sizeof(data));
1439
1440 while (pos + IW_EV_LCP_LEN <= end) {
1441 /* Event data may be unaligned, so make a local, aligned copy
1442 * before processing. */
1443 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1444 if (iwe->len <= IW_EV_LCP_LEN)
1445 break;
1446
1447 custom = pos + IW_EV_POINT_LEN;
1448 if (wext_19_iw_point(drv, iwe->cmd)) {
1449 /* WE-19 removed the pointer from struct iw_point */
1450 char *dpos = (char *) &iwe_buf.u.data.length;
1451 int dlen = dpos - (char *) &iwe_buf;
1452 os_memcpy(dpos, pos + IW_EV_LCP_LEN,
1453 sizeof(struct iw_event) - dlen);
1454 } else {
1455 os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
1456 custom += IW_EV_POINT_OFF;
1457 }
1458
1459 switch (iwe->cmd) {
1460 case SIOCGIWAP:
1461 if (!first)
1462 wpa_driver_wext_add_scan_entry(res, &data);
1463 first = 0;
1464 os_free(data.ie);
1465 os_memset(&data, 0, sizeof(data));
1466 os_memcpy(data.res.bssid,
1467 iwe->u.ap_addr.sa_data, ETH_ALEN);
1468 break;
1469 case SIOCGIWMODE:
1470 wext_get_scan_mode(iwe, &data);
1471 break;
1472 case SIOCGIWESSID:
1473 wext_get_scan_ssid(iwe, &data, custom, end);
1474 break;
1475 case SIOCGIWFREQ:
1476 wext_get_scan_freq(iwe, &data);
1477 break;
1478 case IWEVQUAL:
1479 wext_get_scan_qual(drv, iwe, &data);
1480 break;
1481 case SIOCGIWENCODE:
1482 wext_get_scan_encode(iwe, &data);
1483 break;
1484 case SIOCGIWRATE:
1485 wext_get_scan_rate(iwe, &data, pos, end);
1486 break;
1487 case IWEVGENIE:
1488 wext_get_scan_iwevgenie(iwe, &data, custom, end);
1489 break;
1490 case IWEVCUSTOM:
1491 wext_get_scan_custom(iwe, &data, custom, end);
1492 break;
1493 }
1494
1495 pos += iwe->len;
1496 }
1497 os_free(res_buf);
1498 res_buf = NULL;
1499 if (!first)
1500 wpa_driver_wext_add_scan_entry(res, &data);
1501 os_free(data.ie);
1502
1503 wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
1504 (unsigned long) len, (unsigned long) res->num);
1505
1506 return res;
1507 }
1508
1509
wpa_driver_wext_get_range(void * priv)1510 static int wpa_driver_wext_get_range(void *priv)
1511 {
1512 struct wpa_driver_wext_data *drv = priv;
1513 struct iw_range *range;
1514 struct iwreq iwr;
1515 int minlen;
1516 size_t buflen;
1517
1518 /*
1519 * Use larger buffer than struct iw_range in order to allow the
1520 * structure to grow in the future.
1521 */
1522 buflen = sizeof(struct iw_range) + 500;
1523 range = os_zalloc(buflen);
1524 if (range == NULL)
1525 return -1;
1526
1527 os_memset(&iwr, 0, sizeof(iwr));
1528 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1529 iwr.u.data.pointer = (caddr_t) range;
1530 iwr.u.data.length = buflen;
1531
1532 minlen = ((char *) &range->enc_capa) - (char *) range +
1533 sizeof(range->enc_capa);
1534
1535 if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
1536 perror("ioctl[SIOCGIWRANGE]");
1537 os_free(range);
1538 return -1;
1539 } else if (iwr.u.data.length >= minlen &&
1540 range->we_version_compiled >= 18) {
1541 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
1542 "WE(source)=%d enc_capa=0x%x",
1543 range->we_version_compiled,
1544 range->we_version_source,
1545 range->enc_capa);
1546 drv->has_capability = 1;
1547 drv->we_version_compiled = range->we_version_compiled;
1548 if (range->enc_capa & IW_ENC_CAPA_WPA) {
1549 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1550 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
1551 }
1552 if (range->enc_capa & IW_ENC_CAPA_WPA2) {
1553 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1554 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1555 }
1556 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
1557 WPA_DRIVER_CAPA_ENC_WEP104;
1558 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP128;
1559 if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
1560 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
1561 if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
1562 drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
1563 if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
1564 drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE;
1565 drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1566 WPA_DRIVER_AUTH_SHARED |
1567 WPA_DRIVER_AUTH_LEAP;
1568 drv->capa.max_scan_ssids = 1;
1569
1570 wpa_printf(MSG_DEBUG, " capabilities: key_mgmt 0x%x enc 0x%x "
1571 "flags 0x%x",
1572 drv->capa.key_mgmt, drv->capa.enc, drv->capa.flags);
1573 } else {
1574 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
1575 "assuming WPA is not supported");
1576 }
1577
1578 drv->max_level = range->max_qual.level;
1579
1580 os_free(range);
1581 return 0;
1582 }
1583
1584
wpa_driver_wext_set_psk(struct wpa_driver_wext_data * drv,const u8 * psk)1585 static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
1586 const u8 *psk)
1587 {
1588 struct iw_encode_ext *ext;
1589 struct iwreq iwr;
1590 int ret;
1591
1592 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1593
1594 if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1595 return 0;
1596
1597 if (!psk)
1598 return 0;
1599
1600 os_memset(&iwr, 0, sizeof(iwr));
1601 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1602
1603 ext = os_zalloc(sizeof(*ext) + PMK_LEN);
1604 if (ext == NULL)
1605 return -1;
1606
1607 iwr.u.encoding.pointer = (caddr_t) ext;
1608 iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
1609 ext->key_len = PMK_LEN;
1610 os_memcpy(&ext->key, psk, ext->key_len);
1611 ext->alg = IW_ENCODE_ALG_PMK;
1612
1613 ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
1614 if (ret < 0)
1615 perror("ioctl[SIOCSIWENCODEEXT] PMK");
1616 os_free(ext);
1617
1618 return ret;
1619 }
1620
1621
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)1622 static int wpa_driver_wext_set_key_ext(void *priv, enum wpa_alg alg,
1623 const u8 *addr, int key_idx,
1624 int set_tx, const u8 *seq,
1625 size_t seq_len,
1626 const u8 *key, size_t key_len)
1627 {
1628 struct wpa_driver_wext_data *drv = priv;
1629 struct iwreq iwr;
1630 int ret = 0;
1631 struct iw_encode_ext *ext;
1632
1633 if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
1634 wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
1635 __FUNCTION__, (unsigned long) seq_len);
1636 return -1;
1637 }
1638
1639 ext = os_zalloc(sizeof(*ext) + key_len);
1640 if (ext == NULL)
1641 return -1;
1642 os_memset(&iwr, 0, sizeof(iwr));
1643 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1644 iwr.u.encoding.flags = key_idx + 1;
1645 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1646 if (alg == WPA_ALG_NONE)
1647 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1648 iwr.u.encoding.pointer = (caddr_t) ext;
1649 iwr.u.encoding.length = sizeof(*ext) + key_len;
1650
1651 if (addr == NULL || is_broadcast_ether_addr(addr))
1652 ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
1653 if (set_tx)
1654 ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
1655
1656 ext->addr.sa_family = ARPHRD_ETHER;
1657 if (addr)
1658 os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
1659 else
1660 os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
1661 if (key && key_len) {
1662 os_memcpy(ext + 1, key, key_len);
1663 ext->key_len = key_len;
1664 }
1665 switch (alg) {
1666 case WPA_ALG_NONE:
1667 ext->alg = IW_ENCODE_ALG_NONE;
1668 break;
1669 case WPA_ALG_WEP:
1670 ext->alg = IW_ENCODE_ALG_WEP;
1671 break;
1672 case WPA_ALG_TKIP:
1673 ext->alg = IW_ENCODE_ALG_TKIP;
1674 break;
1675 case WPA_ALG_CCMP:
1676 ext->alg = IW_ENCODE_ALG_CCMP;
1677 break;
1678 case WPA_ALG_PMK:
1679 ext->alg = IW_ENCODE_ALG_PMK;
1680 break;
1681 #ifdef CONFIG_IEEE80211W
1682 case WPA_ALG_IGTK:
1683 ext->alg = IW_ENCODE_ALG_AES_CMAC;
1684 break;
1685 #endif /* CONFIG_IEEE80211W */
1686 default:
1687 wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
1688 __FUNCTION__, alg);
1689 os_free(ext);
1690 return -1;
1691 }
1692
1693 if (seq && seq_len) {
1694 ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
1695 os_memcpy(ext->rx_seq, seq, seq_len);
1696 }
1697
1698 if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
1699 ret = errno == EOPNOTSUPP ? -2 : -1;
1700 if (errno == ENODEV) {
1701 /*
1702 * ndiswrapper seems to be returning incorrect error
1703 * code.. */
1704 ret = -2;
1705 }
1706
1707 perror("ioctl[SIOCSIWENCODEEXT]");
1708 }
1709
1710 os_free(ext);
1711 return ret;
1712 }
1713
1714
1715 /**
1716 * wpa_driver_wext_set_key - Configure encryption key
1717 * @priv: Pointer to private wext data from wpa_driver_wext_init()
1718 * @priv: Private driver interface data
1719 * @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
1720 * %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
1721 * @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
1722 * broadcast/default keys
1723 * @key_idx: key index (0..3), usually 0 for unicast keys
1724 * @set_tx: Configure this key as the default Tx key (only used when
1725 * driver does not support separate unicast/individual key
1726 * @seq: Sequence number/packet number, seq_len octets, the next
1727 * packet number to be used for in replay protection; configured
1728 * for Rx keys (in most cases, this is only used with broadcast
1729 * keys and set to zero for unicast keys)
1730 * @seq_len: Length of the seq, depends on the algorithm:
1731 * TKIP: 6 octets, CCMP: 6 octets
1732 * @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
1733 * 8-byte Rx Mic Key
1734 * @key_len: Length of the key buffer in octets (WEP: 5 or 13,
1735 * TKIP: 32, CCMP: 16)
1736 * Returns: 0 on success, -1 on failure
1737 *
1738 * This function uses SIOCSIWENCODEEXT by default, but tries to use
1739 * SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
1740 */
wpa_driver_wext_set_key(const char * ifname,void * priv,enum wpa_alg alg,const u8 * addr,int key_idx,int set_tx,const u8 * seq,size_t seq_len,const u8 * key,size_t key_len)1741 int wpa_driver_wext_set_key(const char *ifname, void *priv, enum wpa_alg alg,
1742 const u8 *addr, int key_idx,
1743 int set_tx, const u8 *seq, size_t seq_len,
1744 const u8 *key, size_t key_len)
1745 {
1746 struct wpa_driver_wext_data *drv = priv;
1747 struct iwreq iwr;
1748 int ret = 0;
1749
1750 wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
1751 "key_len=%lu",
1752 __FUNCTION__, alg, key_idx, set_tx,
1753 (unsigned long) seq_len, (unsigned long) key_len);
1754
1755 ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
1756 seq, seq_len, key, key_len);
1757 if (ret == 0)
1758 return 0;
1759
1760 if (ret == -2 &&
1761 (alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
1762 wpa_printf(MSG_DEBUG, "Driver did not support "
1763 "SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
1764 ret = 0;
1765 } else {
1766 wpa_printf(MSG_DEBUG, "Driver did not support "
1767 "SIOCSIWENCODEEXT");
1768 return ret;
1769 }
1770
1771 os_memset(&iwr, 0, sizeof(iwr));
1772 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1773 iwr.u.encoding.flags = key_idx + 1;
1774 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1775 if (alg == WPA_ALG_NONE)
1776 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1777 iwr.u.encoding.pointer = (caddr_t) key;
1778 iwr.u.encoding.length = key_len;
1779
1780 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1781 perror("ioctl[SIOCSIWENCODE]");
1782 ret = -1;
1783 }
1784
1785 if (set_tx && alg != WPA_ALG_NONE) {
1786 os_memset(&iwr, 0, sizeof(iwr));
1787 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1788 iwr.u.encoding.flags = key_idx + 1;
1789 iwr.u.encoding.flags |= IW_ENCODE_TEMP;
1790 iwr.u.encoding.pointer = (caddr_t) NULL;
1791 iwr.u.encoding.length = 0;
1792 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
1793 perror("ioctl[SIOCSIWENCODE] (set_tx)");
1794 ret = -1;
1795 }
1796 }
1797
1798 return ret;
1799 }
1800
1801
wpa_driver_wext_set_countermeasures(void * priv,int enabled)1802 static int wpa_driver_wext_set_countermeasures(void *priv,
1803 int enabled)
1804 {
1805 struct wpa_driver_wext_data *drv = priv;
1806 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1807 return wpa_driver_wext_set_auth_param(drv,
1808 IW_AUTH_TKIP_COUNTERMEASURES,
1809 enabled);
1810 }
1811
1812
wpa_driver_wext_set_drop_unencrypted(void * priv,int enabled)1813 static int wpa_driver_wext_set_drop_unencrypted(void *priv,
1814 int enabled)
1815 {
1816 struct wpa_driver_wext_data *drv = priv;
1817 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
1818 drv->use_crypt = enabled;
1819 return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
1820 enabled);
1821 }
1822
1823
wpa_driver_wext_mlme(struct wpa_driver_wext_data * drv,const u8 * addr,int cmd,int reason_code)1824 static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
1825 const u8 *addr, int cmd, int reason_code)
1826 {
1827 struct iwreq iwr;
1828 struct iw_mlme mlme;
1829 int ret = 0;
1830
1831 os_memset(&iwr, 0, sizeof(iwr));
1832 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1833 os_memset(&mlme, 0, sizeof(mlme));
1834 mlme.cmd = cmd;
1835 mlme.reason_code = reason_code;
1836 mlme.addr.sa_family = ARPHRD_ETHER;
1837 os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
1838 iwr.u.data.pointer = (caddr_t) &mlme;
1839 iwr.u.data.length = sizeof(mlme);
1840
1841 if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
1842 perror("ioctl[SIOCSIWMLME]");
1843 ret = -1;
1844 }
1845
1846 return ret;
1847 }
1848
1849
wpa_driver_wext_disconnect(struct wpa_driver_wext_data * drv)1850 static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv)
1851 {
1852 struct iwreq iwr;
1853 const u8 null_bssid[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
1854 u8 ssid[32];
1855 int i;
1856
1857 /*
1858 * Only force-disconnect when the card is in infrastructure mode,
1859 * otherwise the driver might interpret the cleared BSSID and random
1860 * SSID as an attempt to create a new ad-hoc network.
1861 */
1862 os_memset(&iwr, 0, sizeof(iwr));
1863 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1864 if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
1865 perror("ioctl[SIOCGIWMODE]");
1866 iwr.u.mode = IW_MODE_INFRA;
1867 }
1868
1869 if (iwr.u.mode == IW_MODE_INFRA) {
1870 /* Clear the BSSID selection */
1871 if (wpa_driver_wext_set_bssid(drv, null_bssid) < 0) {
1872 wpa_printf(MSG_DEBUG, "WEXT: Failed to clear BSSID "
1873 "selection on disconnect");
1874 }
1875
1876 if (drv->cfg80211) {
1877 /*
1878 * cfg80211 supports SIOCSIWMLME commands, so there is
1879 * no need for the random SSID hack, but clear the
1880 * SSID.
1881 */
1882 if (wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) {
1883 wpa_printf(MSG_DEBUG, "WEXT: Failed to clear "
1884 "SSID on disconnect");
1885 }
1886 return;
1887 }
1888
1889 /*
1890 * Set a random SSID to make sure the driver will not be trying
1891 * to associate with something even if it does not understand
1892 * SIOCSIWMLME commands (or tries to associate automatically
1893 * after deauth/disassoc).
1894 */
1895 for (i = 0; i < 32; i++)
1896 ssid[i] = rand() & 0xFF;
1897 if (wpa_driver_wext_set_ssid(drv, ssid, 32) < 0) {
1898 wpa_printf(MSG_DEBUG, "WEXT: Failed to set bogus "
1899 "SSID to disconnect");
1900 }
1901 }
1902 }
1903
1904
wpa_driver_wext_deauthenticate(void * priv,const u8 * addr,int reason_code)1905 static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
1906 int 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 perror("ioctl[SIOCSIWGENIE]");
1931 ret = -1;
1932 }
1933
1934 return ret;
1935 }
1936
1937
wpa_driver_wext_cipher2wext(int cipher)1938 int wpa_driver_wext_cipher2wext(int cipher)
1939 {
1940 switch (cipher) {
1941 case WPA_CIPHER_NONE:
1942 return IW_AUTH_CIPHER_NONE;
1943 case WPA_CIPHER_WEP40:
1944 return IW_AUTH_CIPHER_WEP40;
1945 case WPA_CIPHER_TKIP:
1946 return IW_AUTH_CIPHER_TKIP;
1947 case WPA_CIPHER_CCMP:
1948 return IW_AUTH_CIPHER_CCMP;
1949 case WPA_CIPHER_WEP104:
1950 return IW_AUTH_CIPHER_WEP104;
1951 default:
1952 return 0;
1953 }
1954 }
1955
1956
wpa_driver_wext_keymgmt2wext(int keymgmt)1957 int wpa_driver_wext_keymgmt2wext(int keymgmt)
1958 {
1959 switch (keymgmt) {
1960 case WPA_KEY_MGMT_IEEE8021X:
1961 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
1962 return IW_AUTH_KEY_MGMT_802_1X;
1963 case WPA_KEY_MGMT_PSK:
1964 return IW_AUTH_KEY_MGMT_PSK;
1965 default:
1966 return 0;
1967 }
1968 }
1969
1970
1971 static int
wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data * drv,struct wpa_driver_associate_params * params)1972 wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
1973 struct wpa_driver_associate_params *params)
1974 {
1975 struct iwreq iwr;
1976 int ret = 0;
1977
1978 wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
1979 "SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
1980
1981 os_memset(&iwr, 0, sizeof(iwr));
1982 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
1983 /* Just changing mode, not actual keys */
1984 iwr.u.encoding.flags = 0;
1985 iwr.u.encoding.pointer = (caddr_t) NULL;
1986 iwr.u.encoding.length = 0;
1987
1988 /*
1989 * Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
1990 * different things. Here they are used to indicate Open System vs.
1991 * Shared Key authentication algorithm. However, some drivers may use
1992 * them to select between open/restricted WEP encrypted (open = allow
1993 * both unencrypted and encrypted frames; restricted = only allow
1994 * encrypted frames).
1995 */
1996
1997 if (!drv->use_crypt) {
1998 iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
1999 } else {
2000 if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2001 iwr.u.encoding.flags |= IW_ENCODE_OPEN;
2002 if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2003 iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
2004 }
2005
2006 if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
2007 perror("ioctl[SIOCSIWENCODE]");
2008 ret = -1;
2009 }
2010
2011 return ret;
2012 }
2013
2014
wpa_driver_wext_associate(void * priv,struct wpa_driver_associate_params * params)2015 int wpa_driver_wext_associate(void *priv,
2016 struct wpa_driver_associate_params *params)
2017 {
2018 struct wpa_driver_wext_data *drv = priv;
2019 int ret = 0;
2020 int allow_unencrypted_eapol;
2021 int value;
2022
2023 wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
2024
2025 if (drv->cfg80211) {
2026 /*
2027 * Stop cfg80211 from trying to associate before we are done
2028 * with all parameters.
2029 */
2030 if (wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) {
2031 wpa_printf(MSG_DEBUG,
2032 "WEXT: Failed to clear SSID to stop pending cfg80211 association attempts (if any)");
2033 /* continue anyway */
2034 }
2035 }
2036
2037 if (wpa_driver_wext_set_drop_unencrypted(drv, params->drop_unencrypted)
2038 < 0)
2039 ret = -1;
2040 if (wpa_driver_wext_set_auth_alg(drv, params->auth_alg) < 0)
2041 ret = -1;
2042 if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
2043 ret = -1;
2044
2045 /*
2046 * If the driver did not support SIOCSIWAUTH, fallback to
2047 * SIOCSIWENCODE here.
2048 */
2049 if (drv->auth_alg_fallback &&
2050 wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
2051 ret = -1;
2052
2053 if (!params->bssid &&
2054 wpa_driver_wext_set_bssid(drv, NULL) < 0)
2055 ret = -1;
2056
2057 /* TODO: should consider getting wpa version and cipher/key_mgmt suites
2058 * from configuration, not from here, where only the selected suite is
2059 * available */
2060 if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
2061 < 0)
2062 ret = -1;
2063 if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
2064 value = IW_AUTH_WPA_VERSION_DISABLED;
2065 else if (params->wpa_ie[0] == WLAN_EID_RSN)
2066 value = IW_AUTH_WPA_VERSION_WPA2;
2067 else
2068 value = IW_AUTH_WPA_VERSION_WPA;
2069 if (wpa_driver_wext_set_auth_param(drv,
2070 IW_AUTH_WPA_VERSION, value) < 0)
2071 ret = -1;
2072 value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
2073 if (wpa_driver_wext_set_auth_param(drv,
2074 IW_AUTH_CIPHER_PAIRWISE, value) < 0)
2075 ret = -1;
2076 value = wpa_driver_wext_cipher2wext(params->group_suite);
2077 if (wpa_driver_wext_set_auth_param(drv,
2078 IW_AUTH_CIPHER_GROUP, value) < 0)
2079 ret = -1;
2080 value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
2081 if (wpa_driver_wext_set_auth_param(drv,
2082 IW_AUTH_KEY_MGMT, value) < 0)
2083 ret = -1;
2084 value = params->key_mgmt_suite != WPA_KEY_MGMT_NONE ||
2085 params->pairwise_suite != WPA_CIPHER_NONE ||
2086 params->group_suite != WPA_CIPHER_NONE ||
2087 params->wpa_ie_len;
2088 if (wpa_driver_wext_set_auth_param(drv,
2089 IW_AUTH_PRIVACY_INVOKED, value) < 0)
2090 ret = -1;
2091
2092 /* Allow unencrypted EAPOL messages even if pairwise keys are set when
2093 * not using WPA. IEEE 802.1X specifies that these frames are not
2094 * encrypted, but WPA encrypts them when pairwise keys are in use. */
2095 if (params->key_mgmt_suite == WPA_KEY_MGMT_IEEE8021X ||
2096 params->key_mgmt_suite == WPA_KEY_MGMT_PSK)
2097 allow_unencrypted_eapol = 0;
2098 else
2099 allow_unencrypted_eapol = 1;
2100
2101 if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
2102 ret = -1;
2103 if (wpa_driver_wext_set_auth_param(drv,
2104 IW_AUTH_RX_UNENCRYPTED_EAPOL,
2105 allow_unencrypted_eapol) < 0)
2106 ret = -1;
2107 #ifdef CONFIG_IEEE80211W
2108 switch (params->mgmt_frame_protection) {
2109 case NO_MGMT_FRAME_PROTECTION:
2110 value = IW_AUTH_MFP_DISABLED;
2111 break;
2112 case MGMT_FRAME_PROTECTION_OPTIONAL:
2113 value = IW_AUTH_MFP_OPTIONAL;
2114 break;
2115 case MGMT_FRAME_PROTECTION_REQUIRED:
2116 value = IW_AUTH_MFP_REQUIRED;
2117 break;
2118 };
2119 if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
2120 ret = -1;
2121 #endif /* CONFIG_IEEE80211W */
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 return ret;
2136 }
2137
2138
wpa_driver_wext_set_auth_alg(void * priv,int auth_alg)2139 static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
2140 {
2141 struct wpa_driver_wext_data *drv = priv;
2142 int algs = 0, res;
2143
2144 if (auth_alg & WPA_AUTH_ALG_OPEN)
2145 algs |= IW_AUTH_ALG_OPEN_SYSTEM;
2146 if (auth_alg & WPA_AUTH_ALG_SHARED)
2147 algs |= IW_AUTH_ALG_SHARED_KEY;
2148 if (auth_alg & WPA_AUTH_ALG_LEAP)
2149 algs |= IW_AUTH_ALG_LEAP;
2150 if (algs == 0) {
2151 /* at least one algorithm should be set */
2152 algs = IW_AUTH_ALG_OPEN_SYSTEM;
2153 }
2154
2155 res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
2156 algs);
2157 drv->auth_alg_fallback = res == -2;
2158 return res;
2159 }
2160
2161
2162 /**
2163 * wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
2164 * @priv: Pointer to private wext data from wpa_driver_wext_init()
2165 * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2166 * Returns: 0 on success, -1 on failure
2167 */
wpa_driver_wext_set_mode(void * priv,int mode)2168 int wpa_driver_wext_set_mode(void *priv, int mode)
2169 {
2170 struct wpa_driver_wext_data *drv = priv;
2171 struct iwreq iwr;
2172 int ret = -1;
2173 unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
2174
2175 os_memset(&iwr, 0, sizeof(iwr));
2176 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2177 iwr.u.mode = new_mode;
2178 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
2179 ret = 0;
2180 goto done;
2181 }
2182
2183 if (errno != EBUSY) {
2184 perror("ioctl[SIOCSIWMODE]");
2185 goto done;
2186 }
2187
2188 /* mac80211 doesn't allow mode changes while the device is up, so if
2189 * the device isn't in the mode we're about to change to, take device
2190 * down, try to set the mode again, and bring it back up.
2191 */
2192 if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
2193 perror("ioctl[SIOCGIWMODE]");
2194 goto done;
2195 }
2196
2197 if (iwr.u.mode == new_mode) {
2198 ret = 0;
2199 goto done;
2200 }
2201
2202 if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0) == 0) {
2203 /* Try to set the mode again while the interface is down */
2204 iwr.u.mode = new_mode;
2205 if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
2206 perror("ioctl[SIOCSIWMODE]");
2207 else
2208 ret = 0;
2209
2210 (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1);
2211 }
2212
2213 done:
2214 return ret;
2215 }
2216
2217
wpa_driver_wext_pmksa(struct wpa_driver_wext_data * drv,u32 cmd,const u8 * bssid,const u8 * pmkid)2218 static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
2219 u32 cmd, const u8 *bssid, const u8 *pmkid)
2220 {
2221 struct iwreq iwr;
2222 struct iw_pmksa pmksa;
2223 int ret = 0;
2224
2225 os_memset(&iwr, 0, sizeof(iwr));
2226 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2227 os_memset(&pmksa, 0, sizeof(pmksa));
2228 pmksa.cmd = cmd;
2229 pmksa.bssid.sa_family = ARPHRD_ETHER;
2230 if (bssid)
2231 os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
2232 if (pmkid)
2233 os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
2234 iwr.u.data.pointer = (caddr_t) &pmksa;
2235 iwr.u.data.length = sizeof(pmksa);
2236
2237 if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
2238 if (errno != EOPNOTSUPP)
2239 perror("ioctl[SIOCSIWPMKSA]");
2240 ret = -1;
2241 }
2242
2243 return ret;
2244 }
2245
2246
wpa_driver_wext_add_pmkid(void * priv,const u8 * bssid,const u8 * pmkid)2247 static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
2248 const u8 *pmkid)
2249 {
2250 struct wpa_driver_wext_data *drv = priv;
2251 return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
2252 }
2253
2254
wpa_driver_wext_remove_pmkid(void * priv,const u8 * bssid,const u8 * pmkid)2255 static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
2256 const u8 *pmkid)
2257 {
2258 struct wpa_driver_wext_data *drv = priv;
2259 return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
2260 }
2261
2262
wpa_driver_wext_flush_pmkid(void * priv)2263 static int wpa_driver_wext_flush_pmkid(void *priv)
2264 {
2265 struct wpa_driver_wext_data *drv = priv;
2266 return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
2267 }
2268
2269
wpa_driver_wext_get_capa(void * priv,struct wpa_driver_capa * capa)2270 int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
2271 {
2272 struct wpa_driver_wext_data *drv = priv;
2273 if (!drv->has_capability)
2274 return -1;
2275 os_memcpy(capa, &drv->capa, sizeof(*capa));
2276 return 0;
2277 }
2278
2279
wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data * drv,const char * ifname)2280 int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
2281 const char *ifname)
2282 {
2283 if (ifname == NULL) {
2284 drv->ifindex2 = -1;
2285 return 0;
2286 }
2287
2288 drv->ifindex2 = if_nametoindex(ifname);
2289 if (drv->ifindex2 <= 0)
2290 return -1;
2291
2292 wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
2293 "wireless events", drv->ifindex2, ifname);
2294
2295 return 0;
2296 }
2297
2298
wpa_driver_wext_set_operstate(void * priv,int state)2299 int wpa_driver_wext_set_operstate(void *priv, int state)
2300 {
2301 struct wpa_driver_wext_data *drv = priv;
2302
2303 wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2304 __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2305 drv->operstate = state;
2306 return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
2307 state ? IF_OPER_UP : IF_OPER_DORMANT);
2308 }
2309
2310
wpa_driver_wext_get_version(struct wpa_driver_wext_data * drv)2311 int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
2312 {
2313 return drv->we_version_compiled;
2314 }
2315
2316
wext_get_radio_name(void * priv)2317 static const char * wext_get_radio_name(void *priv)
2318 {
2319 struct wpa_driver_wext_data *drv = priv;
2320 return drv->phyname;
2321 }
2322
2323
wpa_driver_wext_signal_poll(void * priv,struct wpa_signal_info * si)2324 static int wpa_driver_wext_signal_poll(void *priv, struct wpa_signal_info *si)
2325 {
2326 struct wpa_driver_wext_data *drv = priv;
2327 struct iw_statistics stats;
2328 struct iwreq iwr;
2329
2330 os_memset(si, 0, sizeof(*si));
2331 si->current_signal = -9999;
2332 si->current_noise = 9999;
2333 si->chanwidth = CHAN_WIDTH_UNKNOWN;
2334
2335 os_memset(&iwr, 0, sizeof(iwr));
2336 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
2337 iwr.u.data.pointer = (caddr_t) &stats;
2338 iwr.u.data.length = sizeof(stats);
2339 iwr.u.data.flags = 1;
2340
2341 if (ioctl(drv->ioctl_sock, SIOCGIWSTATS, &iwr) < 0) {
2342 wpa_printf(MSG_ERROR, "WEXT: SIOCGIWSTATS: %s",
2343 strerror(errno));
2344 return -1;
2345 }
2346
2347 si->current_signal = stats.qual.level -
2348 ((stats.qual.updated & IW_QUAL_DBM) ? 0x100 : 0);
2349 si->current_noise = stats.qual.noise -
2350 ((stats.qual.updated & IW_QUAL_DBM) ? 0x100 : 0);
2351 return 0;
2352 }
2353
2354
2355 const struct wpa_driver_ops wpa_driver_wext_ops = {
2356 .name = "wext",
2357 .desc = "Linux wireless extensions (generic)",
2358 .get_bssid = wpa_driver_wext_get_bssid,
2359 .get_ssid = wpa_driver_wext_get_ssid,
2360 .set_key = wpa_driver_wext_set_key,
2361 .set_countermeasures = wpa_driver_wext_set_countermeasures,
2362 .scan2 = wpa_driver_wext_scan,
2363 .get_scan_results2 = wpa_driver_wext_get_scan_results,
2364 .deauthenticate = wpa_driver_wext_deauthenticate,
2365 .associate = wpa_driver_wext_associate,
2366 .init = wpa_driver_wext_init,
2367 .deinit = wpa_driver_wext_deinit,
2368 .add_pmkid = wpa_driver_wext_add_pmkid,
2369 .remove_pmkid = wpa_driver_wext_remove_pmkid,
2370 .flush_pmkid = wpa_driver_wext_flush_pmkid,
2371 .get_capa = wpa_driver_wext_get_capa,
2372 .set_operstate = wpa_driver_wext_set_operstate,
2373 .get_radio_name = wext_get_radio_name,
2374 .signal_poll = wpa_driver_wext_signal_poll,
2375 };
2376