-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathdriver_wext.c
2369 lines (2010 loc) · 61.6 KB
/
driver_wext.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* WPA Supplicant - driver interaction with generic Linux Wireless Extensions
* Copyright (c) 2003-2007, Jouni Malinen <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*
* This file implements a driver interface for the Linux Wireless Extensions.
* When used with WE-18 or newer, this interface can be used as-is with number
* of drivers. In addition to this, some of the common functions in this file
* can be used by other driver interface implementations that use generic WE
* ioctls, but require private ioctls for some of the functionality.
*/
#include "includes.h"
#include <sys/ioctl.h>
#include <net/if_arp.h>
#include "wireless_copy.h"
#include "common.h"
#include "driver.h"
#include "l2_packet.h"
#include "eloop.h"
#include "wpa_supplicant.h"
#include "priv_netlink.h"
#include "driver_wext.h"
#include "wpa.h"
#ifdef CONFIG_CLIENT_MLME
#include <netpacket/packet.h>
#include <hostapd_ioctl.h>
#include <ieee80211_common.h>
/* from net/mac80211.h */
enum {
MODE_IEEE80211A = 0 /* IEEE 802.11a */,
MODE_IEEE80211B = 1 /* IEEE 802.11b only */,
MODE_ATHEROS_TURBO = 2 /* Atheros Turbo mode (2x.11a at 5 GHz) */,
MODE_IEEE80211G = 3 /* IEEE 802.11g (and 802.11b compatibility) */,
MODE_ATHEROS_TURBOG = 4 /* Atheros Turbo mode (2x.11g at 2.4 GHz) */,
NUM_IEEE80211_MODES = 5
};
#include "mlme.h"
#ifndef ETH_P_ALL
#define ETH_P_ALL 0x0003
#endif
#endif /* CONFIG_CLIENT_MLME */
struct wpa_driver_wext_data {
void *ctx;
int event_sock;
int ioctl_sock;
int mlme_sock;
char ifname[IFNAMSIZ + 1];
int ifindex;
int ifindex2;
u8 *assoc_req_ies;
size_t assoc_req_ies_len;
u8 *assoc_resp_ies;
size_t assoc_resp_ies_len;
struct wpa_driver_capa capa;
int has_capability;
int we_version_compiled;
/* for set_auth_alg fallback */
int use_crypt;
int auth_alg_fallback;
int operstate;
char mlmedev[IFNAMSIZ + 1];
int scan_complete_events;
};
static int wpa_driver_wext_flush_pmkid(void *priv);
static int wpa_driver_wext_get_range(void *priv);
static int wpa_driver_wext_send_oper_ifla(struct wpa_driver_wext_data *drv,
int linkmode, int operstate)
{
struct {
struct nlmsghdr hdr;
struct ifinfomsg ifinfo;
char opts[16];
} req;
struct rtattr *rta;
static int nl_seq;
ssize_t ret;
req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
req.hdr.nlmsg_type = RTM_SETLINK;
req.hdr.nlmsg_flags = NLM_F_REQUEST;
req.hdr.nlmsg_seq = ++nl_seq;
req.hdr.nlmsg_pid = 0;
req.ifinfo.ifi_family = AF_UNSPEC;
req.ifinfo.ifi_type = 0;
req.ifinfo.ifi_index = drv->ifindex;
req.ifinfo.ifi_flags = 0;
req.ifinfo.ifi_change = 0;
if (linkmode != -1) {
rta = (struct rtattr *)
((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
rta->rta_type = IFLA_LINKMODE;
rta->rta_len = RTA_LENGTH(sizeof(char));
*((char *) RTA_DATA(rta)) = linkmode;
req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
RTA_LENGTH(sizeof(char));
}
if (operstate != -1) {
rta = (struct rtattr *)
((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
rta->rta_type = IFLA_OPERSTATE;
rta->rta_len = RTA_LENGTH(sizeof(char));
*((char *) RTA_DATA(rta)) = operstate;
req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
RTA_LENGTH(sizeof(char));
}
wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
linkmode, operstate);
ret = send(drv->event_sock, &req, req.hdr.nlmsg_len, 0);
if (ret < 0) {
wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
"%s (assume operstate is not supported)",
strerror(errno));
}
return ret < 0 ? -1 : 0;
}
static int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
int idx, u32 value)
{
struct iwreq iwr;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.param.flags = idx & IW_AUTH_INDEX;
iwr.u.param.value = value;
if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
perror("ioctl[SIOCSIWAUTH]");
fprintf(stderr, "WEXT auth param %d value 0x%x - ",
idx, value);
ret = errno == EOPNOTSUPP ? -2 : -1;
}
return ret;
}
/**
* wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
* @priv: Pointer to private wext data from wpa_driver_wext_init()
* @bssid: Buffer for BSSID
* Returns: 0 on success, -1 on failure
*/
int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
{
struct wpa_driver_wext_data *drv = priv;
struct iwreq iwr;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
perror("ioctl[SIOCGIWAP]");
ret = -1;
}
os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
return ret;
}
/**
* wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
* @priv: Pointer to private wext data from wpa_driver_wext_init()
* @bssid: BSSID
* Returns: 0 on success, -1 on failure
*/
int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
{
struct wpa_driver_wext_data *drv = priv;
struct iwreq iwr;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
if (bssid)
os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
else
os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
perror("ioctl[SIOCSIWAP]");
ret = -1;
}
return ret;
}
/**
* wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
* @priv: Pointer to private wext data from wpa_driver_wext_init()
* @ssid: Buffer for the SSID; must be at least 32 bytes long
* Returns: SSID length on success, -1 on failure
*/
int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
{
struct wpa_driver_wext_data *drv = priv;
struct iwreq iwr;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.essid.pointer = (caddr_t) ssid;
iwr.u.essid.length = 32;
if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
perror("ioctl[SIOCGIWESSID]");
ret = -1;
} else {
ret = iwr.u.essid.length;
if (ret > 32)
ret = 32;
/* Some drivers include nul termination in the SSID, so let's
* remove it here before further processing. WE-21 changes this
* to explicitly require the length _not_ to include nul
* termination. */
if (ret > 0 && ssid[ret - 1] == '\0' &&
drv->we_version_compiled < 21)
ret--;
}
return ret;
}
/**
* wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
* @priv: Pointer to private wext data from wpa_driver_wext_init()
* @ssid: SSID
* @ssid_len: Length of SSID (0..32)
* Returns: 0 on success, -1 on failure
*/
int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
{
struct wpa_driver_wext_data *drv = priv;
struct iwreq iwr;
int ret = 0;
char buf[33];
if (ssid_len > 32)
return -1;
os_memset(&iwr, 0, sizeof(iwr));
os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
/* flags: 1 = ESSID is active, 0 = not (promiscuous) */
iwr.u.essid.flags = (ssid_len != 0);
os_memset(buf, 0, sizeof(buf));
os_memcpy(buf, ssid, ssid_len);
iwr.u.essid.pointer = (caddr_t) buf;
if (drv->we_version_compiled < 21) {
/* For historic reasons, set SSID length to include one extra
* character, C string nul termination, even though SSID is
* really an octet string that should not be presented as a C
* string. Some Linux drivers decrement the length by one and
* can thus end up missing the last octet of the SSID if the
* length is not incremented here. WE-21 changes this to
* explicitly require the length _not_ to include nul
* termination. */
if (ssid_len)
ssid_len++;
}
iwr.u.essid.length = ssid_len;
if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
perror("ioctl[SIOCSIWESSID]");
ret = -1;
}
return ret;
}
/**
* wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
* @priv: Pointer to private wext data from wpa_driver_wext_init()
* @freq: Frequency in MHz
* Returns: 0 on success, -1 on failure
*/
int wpa_driver_wext_set_freq(void *priv, int freq)
{
struct wpa_driver_wext_data *drv = priv;
struct iwreq iwr;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.freq.m = freq * 100000;
iwr.u.freq.e = 1;
if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
perror("ioctl[SIOCSIWFREQ]");
ret = -1;
}
return ret;
}
static void
wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
{
union wpa_event_data data;
wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
custom);
os_memset(&data, 0, sizeof(data));
/* Host AP driver */
if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
data.michael_mic_failure.unicast =
os_strstr(custom, " unicast ") != NULL;
/* TODO: parse parameters(?) */
wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
} else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
char *spos;
int bytes;
spos = custom + 17;
bytes = strspn(spos, "0123456789abcdefABCDEF");
if (!bytes || (bytes & 1))
return;
bytes /= 2;
data.assoc_info.req_ies = os_malloc(bytes);
if (data.assoc_info.req_ies == NULL)
return;
data.assoc_info.req_ies_len = bytes;
hexstr2bin(spos, data.assoc_info.req_ies, bytes);
spos += bytes * 2;
data.assoc_info.resp_ies = NULL;
data.assoc_info.resp_ies_len = 0;
if (os_strncmp(spos, " RespIEs=", 9) == 0) {
spos += 9;
bytes = strspn(spos, "0123456789abcdefABCDEF");
if (!bytes || (bytes & 1))
goto done;
bytes /= 2;
data.assoc_info.resp_ies = os_malloc(bytes);
if (data.assoc_info.resp_ies == NULL)
goto done;
data.assoc_info.resp_ies_len = bytes;
hexstr2bin(spos, data.assoc_info.resp_ies, bytes);
}
wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
done:
os_free(data.assoc_info.resp_ies);
os_free(data.assoc_info.req_ies);
#ifdef CONFIG_PEERKEY
} else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
"STKSTART.request '%s'", custom + 17);
return;
}
wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
#endif /* CONFIG_PEERKEY */
}
}
static int wpa_driver_wext_event_wireless_michaelmicfailure(
void *ctx, const char *ev, size_t len)
{
const struct iw_michaelmicfailure *mic;
union wpa_event_data data;
if (len < sizeof(*mic))
return -1;
mic = (const struct iw_michaelmicfailure *) ev;
wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
"flags=0x%x src_addr=" MACSTR, mic->flags,
MAC2STR(mic->src_addr.sa_data));
os_memset(&data, 0, sizeof(data));
data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
return 0;
}
static int wpa_driver_wext_event_wireless_pmkidcand(
struct wpa_driver_wext_data *drv, const char *ev, size_t len)
{
const struct iw_pmkid_cand *cand;
union wpa_event_data data;
const u8 *addr;
if (len < sizeof(*cand))
return -1;
cand = (const struct iw_pmkid_cand *) ev;
addr = (const u8 *) cand->bssid.sa_data;
wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
"flags=0x%x index=%d bssid=" MACSTR, cand->flags,
cand->index, MAC2STR(addr));
os_memset(&data, 0, sizeof(data));
os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
data.pmkid_candidate.index = cand->index;
data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
return 0;
}
static int wpa_driver_wext_event_wireless_assocreqie(
struct wpa_driver_wext_data *drv, const char *ev, int len)
{
if (len < 0)
return -1;
wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
len);
os_free(drv->assoc_req_ies);
drv->assoc_req_ies = os_malloc(len);
if (drv->assoc_req_ies == NULL) {
drv->assoc_req_ies_len = 0;
return -1;
}
os_memcpy(drv->assoc_req_ies, ev, len);
drv->assoc_req_ies_len = len;
return 0;
}
static int wpa_driver_wext_event_wireless_assocrespie(
struct wpa_driver_wext_data *drv, const char *ev, int len)
{
if (len < 0)
return -1;
wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
len);
os_free(drv->assoc_resp_ies);
drv->assoc_resp_ies = os_malloc(len);
if (drv->assoc_resp_ies == NULL) {
drv->assoc_resp_ies_len = 0;
return -1;
}
os_memcpy(drv->assoc_resp_ies, ev, len);
drv->assoc_resp_ies_len = len;
return 0;
}
static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
{
union wpa_event_data data;
if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
return;
os_memset(&data, 0, sizeof(data));
if (drv->assoc_req_ies) {
data.assoc_info.req_ies = drv->assoc_req_ies;
drv->assoc_req_ies = NULL;
data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
}
if (drv->assoc_resp_ies) {
data.assoc_info.resp_ies = drv->assoc_resp_ies;
drv->assoc_resp_ies = NULL;
data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
}
wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
os_free(data.assoc_info.req_ies);
os_free(data.assoc_info.resp_ies);
}
static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_data *drv,
void *ctx, char *data, int len)
{
struct iw_event iwe_buf, *iwe = &iwe_buf;
char *pos, *end, *custom, *buf;
pos = data;
end = data + len;
while (pos + IW_EV_LCP_LEN <= end) {
/* Event data may be unaligned, so make a local, aligned copy
* before processing. */
os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
iwe->cmd, iwe->len);
if (iwe->len <= IW_EV_LCP_LEN)
return;
custom = pos + IW_EV_POINT_LEN;
if (drv->we_version_compiled > 18 &&
(iwe->cmd == IWEVMICHAELMICFAILURE ||
iwe->cmd == IWEVCUSTOM ||
iwe->cmd == IWEVASSOCREQIE ||
iwe->cmd == IWEVASSOCRESPIE ||
iwe->cmd == IWEVPMKIDCAND)) {
/* WE-19 removed the pointer from struct iw_point */
char *dpos = (char *) &iwe_buf.u.data.length;
int dlen = dpos - (char *) &iwe_buf;
os_memcpy(dpos, pos + IW_EV_LCP_LEN,
sizeof(struct iw_event) - dlen);
} else {
os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
custom += IW_EV_POINT_OFF;
}
switch (iwe->cmd) {
case SIOCGIWAP:
wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
MACSTR,
MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
if (os_memcmp(iwe->u.ap_addr.sa_data,
"\x00\x00\x00\x00\x00\x00", ETH_ALEN) ==
0 ||
os_memcmp(iwe->u.ap_addr.sa_data,
"\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
0) {
os_free(drv->assoc_req_ies);
drv->assoc_req_ies = NULL;
os_free(drv->assoc_resp_ies);
drv->assoc_resp_ies = NULL;
wpa_supplicant_event(ctx, EVENT_DISASSOC,
NULL);
} else {
wpa_driver_wext_event_assoc_ies(drv);
wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
}
break;
case IWEVMICHAELMICFAILURE:
wpa_driver_wext_event_wireless_michaelmicfailure(
ctx, custom, iwe->u.data.length);
break;
case IWEVCUSTOM:
if (custom + iwe->u.data.length > end)
return;
buf = os_malloc(iwe->u.data.length + 1);
if (buf == NULL)
return;
os_memcpy(buf, custom, iwe->u.data.length);
buf[iwe->u.data.length] = '\0';
wpa_driver_wext_event_wireless_custom(ctx, buf);
os_free(buf);
break;
case SIOCGIWSCAN:
drv->scan_complete_events = 1;
eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
drv, ctx);
wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
break;
case IWEVASSOCREQIE:
wpa_driver_wext_event_wireless_assocreqie(
drv, custom, iwe->u.data.length);
break;
case IWEVASSOCRESPIE:
wpa_driver_wext_event_wireless_assocrespie(
drv, custom, iwe->u.data.length);
break;
case IWEVPMKIDCAND:
wpa_driver_wext_event_wireless_pmkidcand(
drv, custom, iwe->u.data.length);
break;
}
pos += iwe->len;
}
}
static void wpa_driver_wext_event_link(void *ctx, char *buf, size_t len,
int del)
{
union wpa_event_data event;
os_memset(&event, 0, sizeof(event));
if (len > sizeof(event.interface_status.ifname))
len = sizeof(event.interface_status.ifname) - 1;
os_memcpy(event.interface_status.ifname, buf, len);
event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
EVENT_INTERFACE_ADDED;
wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
del ? "DEL" : "NEW",
event.interface_status.ifname,
del ? "removed" : "added");
wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
}
static void wpa_driver_wext_event_rtm_newlink(struct wpa_driver_wext_data *drv,
void *ctx, struct nlmsghdr *h,
size_t len)
{
struct ifinfomsg *ifi;
int attrlen, nlmsg_len, rta_len;
struct rtattr * attr;
if (len < sizeof(*ifi))
return;
ifi = NLMSG_DATA(h);
if (drv->ifindex != ifi->ifi_index && drv->ifindex2 != ifi->ifi_index)
{
wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
ifi->ifi_index);
return;
}
wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
"(%s%s%s%s)",
drv->operstate, ifi->ifi_flags,
(ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
(ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
(ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
(ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT" : "");
/*
* Some drivers send the association event before the operup event--in
* this case, lifting operstate in wpa_driver_wext_set_operstate()
* fails. This will hit us when wpa_supplicant does not need to do
* IEEE 802.1X authentication
*/
if (drv->operstate == 1 &&
(ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
!(ifi->ifi_flags & IFF_RUNNING))
wpa_driver_wext_send_oper_ifla(drv, -1, IF_OPER_UP);
nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
attrlen = h->nlmsg_len - nlmsg_len;
if (attrlen < 0)
return;
attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
rta_len = RTA_ALIGN(sizeof(struct rtattr));
while (RTA_OK(attr, attrlen)) {
if (attr->rta_type == IFLA_WIRELESS) {
wpa_driver_wext_event_wireless(
drv, ctx, ((char *) attr) + rta_len,
attr->rta_len - rta_len);
} else if (attr->rta_type == IFLA_IFNAME) {
wpa_driver_wext_event_link(ctx,
((char *) attr) + rta_len,
attr->rta_len - rta_len, 0);
}
attr = RTA_NEXT(attr, attrlen);
}
}
static void wpa_driver_wext_event_rtm_dellink(struct wpa_driver_wext_data *drv,
void *ctx, struct nlmsghdr *h,
size_t len)
{
struct ifinfomsg *ifi;
int attrlen, nlmsg_len, rta_len;
struct rtattr * attr;
if (len < sizeof(*ifi))
return;
ifi = NLMSG_DATA(h);
nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
attrlen = h->nlmsg_len - nlmsg_len;
if (attrlen < 0)
return;
attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
rta_len = RTA_ALIGN(sizeof(struct rtattr));
while (RTA_OK(attr, attrlen)) {
if (attr->rta_type == IFLA_IFNAME) {
wpa_driver_wext_event_link(ctx,
((char *) attr) + rta_len,
attr->rta_len - rta_len, 1);
}
attr = RTA_NEXT(attr, attrlen);
}
}
static void wpa_driver_wext_event_receive(int sock, void *eloop_ctx,
void *sock_ctx)
{
char buf[8192];
int left;
struct sockaddr_nl from;
socklen_t fromlen;
struct nlmsghdr *h;
int max_events = 10;
try_again:
fromlen = sizeof(from);
left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
(struct sockaddr *) &from, &fromlen);
if (left < 0) {
if (errno != EINTR && errno != EAGAIN)
perror("recvfrom(netlink)");
return;
}
h = (struct nlmsghdr *) buf;
while (left >= (int) sizeof(*h)) {
int len, plen;
len = h->nlmsg_len;
plen = len - sizeof(*h);
if (len > left || plen < 0) {
wpa_printf(MSG_DEBUG, "Malformed netlink message: "
"len=%d left=%d plen=%d",
len, left, plen);
break;
}
switch (h->nlmsg_type) {
case RTM_NEWLINK:
wpa_driver_wext_event_rtm_newlink(eloop_ctx, sock_ctx,
h, plen);
break;
case RTM_DELLINK:
wpa_driver_wext_event_rtm_dellink(eloop_ctx, sock_ctx,
h, plen);
break;
}
len = NLMSG_ALIGN(len);
left -= len;
h = (struct nlmsghdr *) ((char *) h + len);
}
if (left > 0) {
wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
"message", left);
}
if (--max_events > 0) {
/*
* Try to receive all events in one eloop call in order to
* limit race condition on cases where AssocInfo event, Assoc
* event, and EAPOL frames are received more or less at the
* same time. We want to process the event messages first
* before starting EAPOL processing.
*/
goto try_again;
}
}
static int wpa_driver_wext_get_ifflags_ifname(struct wpa_driver_wext_data *drv,
const char *ifname, int *flags)
{
struct ifreq ifr;
os_memset(&ifr, 0, sizeof(ifr));
os_strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
perror("ioctl[SIOCGIFFLAGS]");
return -1;
}
*flags = ifr.ifr_flags & 0xffff;
return 0;
}
/**
* wpa_driver_wext_get_ifflags - Get interface flags (SIOCGIFFLAGS)
* @drv: driver_wext private data
* @flags: Pointer to returned flags value
* Returns: 0 on success, -1 on failure
*/
int wpa_driver_wext_get_ifflags(struct wpa_driver_wext_data *drv, int *flags)
{
return wpa_driver_wext_get_ifflags_ifname(drv, drv->ifname, flags);
}
static int wpa_driver_wext_set_ifflags_ifname(struct wpa_driver_wext_data *drv,
const char *ifname, int flags)
{
struct ifreq ifr;
os_memset(&ifr, 0, sizeof(ifr));
os_strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
ifr.ifr_flags = flags & 0xffff;
if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
perror("SIOCSIFFLAGS");
return -1;
}
return 0;
}
/**
* wpa_driver_wext_set_ifflags - Set interface flags (SIOCSIFFLAGS)
* @drv: driver_wext private data
* @flags: New value for flags
* Returns: 0 on success, -1 on failure
*/
int wpa_driver_wext_set_ifflags(struct wpa_driver_wext_data *drv, int flags)
{
return wpa_driver_wext_set_ifflags_ifname(drv, drv->ifname, flags);
}
/**
* wpa_driver_wext_init - Initialize WE driver interface
* @ctx: context to be used when calling wpa_supplicant functions,
* e.g., wpa_supplicant_event()
* @ifname: interface name, e.g., wlan0
* Returns: Pointer to private data, %NULL on failure
*/
void * wpa_driver_wext_init(void *ctx, const char *ifname)
{
int s, flags;
struct sockaddr_nl local;
struct wpa_driver_wext_data *drv;
drv = os_zalloc(sizeof(*drv));
if (drv == NULL)
return NULL;
drv->ctx = ctx;
os_strncpy(drv->ifname, ifname, sizeof(drv->ifname));
drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
if (drv->ioctl_sock < 0) {
perror("socket(PF_INET,SOCK_DGRAM)");
os_free(drv);
return NULL;
}
s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (s < 0) {
perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
close(drv->ioctl_sock);
os_free(drv);
return NULL;
}
os_memset(&local, 0, sizeof(local));
local.nl_family = AF_NETLINK;
local.nl_groups = RTMGRP_LINK;
if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
perror("bind(netlink)");
close(s);
close(drv->ioctl_sock);
os_free(drv);
return NULL;
}
eloop_register_read_sock(s, wpa_driver_wext_event_receive, drv, ctx);
drv->event_sock = s;
drv->mlme_sock = -1;
/*
* Make sure that the driver does not have any obsolete PMKID entries.
*/
wpa_driver_wext_flush_pmkid(drv);
if (wpa_driver_wext_set_mode(drv, 0) < 0) {
printf("Could not configure driver to use managed mode\n");
}
if (wpa_driver_wext_get_ifflags(drv, &flags) != 0 ||
wpa_driver_wext_set_ifflags(drv, flags | IFF_UP) != 0) {
printf("Could not set interface '%s' UP\n", drv->ifname);
}
wpa_driver_wext_get_range(drv);
drv->ifindex = if_nametoindex(drv->ifname);
if (os_strncmp(ifname, "wlan", 4) == 0) {
/*
* Host AP driver may use both wlan# and wifi# interface in
* wireless events. Since some of the versions included WE-18
* support, let's add the alternative ifindex also from
* driver_wext.c for the time being. This may be removed at
* some point once it is believed that old versions of the
* driver are not in use anymore.
*/
char ifname2[IFNAMSIZ + 1];
os_strncpy(ifname2, ifname, sizeof(ifname2));
os_memcpy(ifname2, "wifi", 4);
wpa_driver_wext_alternative_ifindex(drv, ifname2);
}
wpa_driver_wext_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
return drv;
}
/**
* wpa_driver_wext_deinit - Deinitialize WE driver interface
* @priv: Pointer to private wext data from wpa_driver_wext_init()
*
* Shut down driver interface and processing of driver events. Free
* private data buffer if one was allocated in wpa_driver_wext_init().
*/
void wpa_driver_wext_deinit(void *priv)
{
struct wpa_driver_wext_data *drv = priv;
int flags;
eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
/*
* Clear possibly configured driver parameters in order to make it
* easier to use the driver after wpa_supplicant has been terminated.
*/
wpa_driver_wext_set_bssid(drv, (u8 *) "\x00\x00\x00\x00\x00\x00");
wpa_driver_wext_send_oper_ifla(priv, 0, IF_OPER_UP);
eloop_unregister_read_sock(drv->event_sock);
if (drv->mlme_sock >= 0)
eloop_unregister_read_sock(drv->mlme_sock);
if (wpa_driver_wext_get_ifflags(drv, &flags) == 0)
(void) wpa_driver_wext_set_ifflags(drv, flags & ~IFF_UP);
#ifdef CONFIG_CLIENT_MLME
if (drv->mlmedev[0] &&
wpa_driver_wext_get_ifflags_ifname(drv, drv->mlmedev, &flags) == 0)
(void) wpa_driver_wext_set_ifflags_ifname(drv, drv->mlmedev,
flags & ~IFF_UP);
#endif /* CONFIG_CLIENT_MLME */
close(drv->event_sock);
close(drv->ioctl_sock);
if (drv->mlme_sock >= 0)
close(drv->mlme_sock);
os_free(drv->assoc_req_ies);
os_free(drv->assoc_resp_ies);
os_free(drv);
}
/**
* wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
* @eloop_ctx: Unused
* @timeout_ctx: ctx argument given to wpa_driver_wext_init()
*
* This function can be used as registered timeout when starting a scan to
* generate a scan completed event if the driver does not report this.
*/