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
|
/*
* WPA Supplicant / Windows Named Pipe -based control interface
* Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
*
* 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.
*/
#include "includes.h"
#include "common.h"
#include "eloop.h"
#include "config.h"
#include "eapol_supp/eapol_supp_sm.h"
#include "wpa_supplicant_i.h"
#include "ctrl_iface.h"
#include "common/wpa_ctrl.h"
#ifdef __MINGW32_VERSION
/* mingw-w32api v3.1 does not yet include sddl.h, so define needed parts here
*/
#define SDDL_REVISION_1 1
BOOL WINAPI ConvertStringSecurityDescriptorToSecurityDescriptorA(
LPCSTR, DWORD, PSECURITY_DESCRIPTOR *, PULONG);
BOOL WINAPI ConvertStringSecurityDescriptorToSecurityDescriptorW(
LPCWSTR, DWORD, PSECURITY_DESCRIPTOR *, PULONG);
#ifdef UNICODE
#define ConvertStringSecurityDescriptorToSecurityDescriptor \
ConvertStringSecurityDescriptorToSecurityDescriptorW
#else
#define ConvertStringSecurityDescriptorToSecurityDescriptor \
ConvertStringSecurityDescriptorToSecurityDescriptorA
#endif
#else /* __MINGW32_VERSION */
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0500
#endif
#include <sddl.h>
#endif /* __MINGW32_VERSION */
#ifndef WPA_SUPPLICANT_NAMED_PIPE
#define WPA_SUPPLICANT_NAMED_PIPE "WpaSupplicant"
#endif
#define NAMED_PIPE_PREFIX TEXT("\\\\.\\pipe\\") TEXT(WPA_SUPPLICANT_NAMED_PIPE)
/* Per-interface ctrl_iface */
#define REQUEST_BUFSIZE 256
#define REPLY_BUFSIZE 4096
struct ctrl_iface_priv;
/**
* struct wpa_ctrl_dst - Internal data structure of control interface clients
*
* This structure is used to store information about registered control
* interface monitors into struct wpa_supplicant. This data is private to
* ctrl_iface_named_pipe.c and should not be touched directly from other files.
*/
struct wpa_ctrl_dst {
/* Note: OVERLAPPED must be the first member of struct wpa_ctrl_dst */
OVERLAPPED overlap;
struct wpa_ctrl_dst *next, *prev;
struct ctrl_iface_priv *priv;
HANDLE pipe;
int attached;
int debug_level;
int errors;
char req_buf[REQUEST_BUFSIZE];
char *rsp_buf;
int used;
};
struct ctrl_iface_priv {
struct wpa_supplicant *wpa_s;
struct wpa_ctrl_dst *ctrl_dst;
SECURITY_ATTRIBUTES attr;
int sec_attr_set;
};
static void wpa_supplicant_ctrl_iface_send(struct ctrl_iface_priv *priv,
int level, const char *buf,
size_t len);
static void ctrl_close_pipe(struct wpa_ctrl_dst *dst);
static void wpa_supplicant_ctrl_iface_receive(void *, void *);
static VOID WINAPI ctrl_iface_read_completed(DWORD err, DWORD bytes,
LPOVERLAPPED overlap);
struct wpa_global_dst;
static void global_close_pipe(struct wpa_global_dst *dst);
static void wpa_supplicant_global_iface_receive(void *eloop_data,
void *user_ctx);
static VOID WINAPI global_iface_read_completed(DWORD err, DWORD bytes,
LPOVERLAPPED overlap);
static int ctrl_broken_pipe(HANDLE pipe, int used)
{
DWORD err;
if (PeekNamedPipe(pipe, NULL, 0, NULL, NULL, NULL))
return 0;
err = GetLastError();
if (err == ERROR_BROKEN_PIPE || (err == ERROR_BAD_PIPE && used))
return 1;
return 0;
}
static void ctrl_flush_broken_pipes(struct ctrl_iface_priv *priv)
{
struct wpa_ctrl_dst *dst, *next;
dst = priv->ctrl_dst;
while (dst) {
next = dst->next;
if (ctrl_broken_pipe(dst->pipe, dst->used)) {
wpa_printf(MSG_DEBUG, "CTRL: closing broken pipe %p",
dst);
ctrl_close_pipe(dst);
}
dst = next;
}
}
static int ctrl_open_pipe(struct ctrl_iface_priv *priv)
{
struct wpa_ctrl_dst *dst;
DWORD err;
TCHAR name[256];
dst = os_zalloc(sizeof(*dst));
if (dst == NULL)
return -1;
wpa_printf(MSG_DEBUG, "CTRL: Open pipe %p", dst);
dst->priv = priv;
dst->debug_level = MSG_INFO;
dst->pipe = INVALID_HANDLE_VALUE;
dst->overlap.hEvent = CreateEvent(NULL, TRUE, TRUE, NULL);
if (dst->overlap.hEvent == NULL) {
wpa_printf(MSG_ERROR, "CTRL: CreateEvent failed: %d",
(int) GetLastError());
goto fail;
}
eloop_register_event(dst->overlap.hEvent,
sizeof(dst->overlap.hEvent),
wpa_supplicant_ctrl_iface_receive, dst, NULL);
#ifdef UNICODE
_snwprintf(name, 256, NAMED_PIPE_PREFIX TEXT("-%S"),
priv->wpa_s->ifname);
#else /* UNICODE */
os_snprintf(name, 256, NAMED_PIPE_PREFIX "-%s",
priv->wpa_s->ifname);
#endif /* UNICODE */
/* TODO: add support for configuring access list for the pipe */
dst->pipe = CreateNamedPipe(name,
PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
PIPE_TYPE_MESSAGE |
PIPE_READMODE_MESSAGE |
PIPE_WAIT,
15, REPLY_BUFSIZE, REQUEST_BUFSIZE,
1000,
priv->sec_attr_set ? &priv->attr : NULL);
if (dst->pipe == INVALID_HANDLE_VALUE) {
wpa_printf(MSG_ERROR, "CTRL: CreateNamedPipe failed: %d",
(int) GetLastError());
goto fail;
}
if (ConnectNamedPipe(dst->pipe, &dst->overlap)) {
wpa_printf(MSG_ERROR, "CTRL: ConnectNamedPipe failed: %d",
(int) GetLastError());
CloseHandle(dst->pipe);
os_free(dst);
return -1;
}
err = GetLastError();
switch (err) {
case ERROR_IO_PENDING:
wpa_printf(MSG_DEBUG, "CTRL: ConnectNamedPipe: connection in "
"progress");
break;
case ERROR_PIPE_CONNECTED:
wpa_printf(MSG_DEBUG, "CTRL: ConnectNamedPipe: already "
"connected");
if (SetEvent(dst->overlap.hEvent))
break;
/* fall through */
default:
wpa_printf(MSG_DEBUG, "CTRL: ConnectNamedPipe error: %d",
(int) err);
CloseHandle(dst->pipe);
os_free(dst);
return -1;
}
dst->next = priv->ctrl_dst;
if (dst->next)
dst->next->prev = dst;
priv->ctrl_dst = dst;
return 0;
fail:
ctrl_close_pipe(dst);
return -1;
}
static void ctrl_close_pipe(struct wpa_ctrl_dst *dst)
{
wpa_printf(MSG_DEBUG, "CTRL: close pipe %p", dst);
if (dst->overlap.hEvent) {
eloop_unregister_event(dst->overlap.hEvent,
sizeof(dst->overlap.hEvent));
CloseHandle(dst->overlap.hEvent);
}
if (dst->pipe != INVALID_HANDLE_VALUE) {
/*
* Could use FlushFileBuffers() here to guarantee that all data
* gets delivered to the client, but that can block, so let's
* not do this for now.
* FlushFileBuffers(dst->pipe);
*/
CloseHandle(dst->pipe);
}
if (dst->prev)
dst->prev->next = dst->next;
else
dst->priv->ctrl_dst = dst->next;
if (dst->next)
dst->next->prev = dst->prev;
os_free(dst->rsp_buf);
os_free(dst);
}
static VOID WINAPI ctrl_iface_write_completed(DWORD err, DWORD bytes,
LPOVERLAPPED overlap)
{
struct wpa_ctrl_dst *dst = (struct wpa_ctrl_dst *) overlap;
wpa_printf(MSG_DEBUG, "CTRL: Overlapped write completed: dst=%p "
"err=%d bytes=%d", dst, (int) err, (int) bytes);
if (err) {
ctrl_close_pipe(dst);
return;
}
os_free(dst->rsp_buf);
dst->rsp_buf = NULL;
if (!ReadFileEx(dst->pipe, dst->req_buf, sizeof(dst->req_buf),
&dst->overlap, ctrl_iface_read_completed)) {
wpa_printf(MSG_DEBUG, "CTRL: ReadFileEx failed: %d",
(int) GetLastError());
ctrl_close_pipe(dst);
return;
}
wpa_printf(MSG_DEBUG, "CTRL: Overlapped read started for %p", dst);
}
static void wpa_supplicant_ctrl_iface_rx(struct wpa_ctrl_dst *dst, size_t len)
{
struct wpa_supplicant *wpa_s = dst->priv->wpa_s;
char *reply = NULL, *send_buf;
size_t reply_len = 0, send_len;
int new_attached = 0;
char *buf = dst->req_buf;
dst->used = 1;
if (len >= REQUEST_BUFSIZE)
len = REQUEST_BUFSIZE - 1;
buf[len] = '\0';
if (os_strcmp(buf, "ATTACH") == 0) {
dst->attached = 1;
wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor attached");
new_attached = 1;
reply_len = 2;
} else if (os_strcmp(buf, "DETACH") == 0) {
dst->attached = 0;
wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor detached");
reply_len = 2;
} else if (os_strncmp(buf, "LEVEL ", 6) == 0) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE LEVEL %s", buf + 6);
dst->debug_level = atoi(buf + 6);
reply_len = 2;
} else {
reply = wpa_supplicant_ctrl_iface_process(wpa_s, buf,
&reply_len);
}
if (reply) {
send_buf = reply;
send_len = reply_len;
} else if (reply_len == 2) {
send_buf = "OK\n";
send_len = 3;
} else {
send_buf = "FAIL\n";
send_len = 5;
}
os_free(dst->rsp_buf);
dst->rsp_buf = os_malloc(send_len);
if (dst->rsp_buf == NULL) {
ctrl_close_pipe(dst);
os_free(reply);
return;
}
os_memcpy(dst->rsp_buf, send_buf, send_len);
os_free(reply);
if (!WriteFileEx(dst->pipe, dst->rsp_buf, send_len, &dst->overlap,
ctrl_iface_write_completed)) {
wpa_printf(MSG_DEBUG, "CTRL: WriteFileEx failed: %d",
(int) GetLastError());
ctrl_close_pipe(dst);
} else {
wpa_printf(MSG_DEBUG, "CTRL: Overlapped write started for %p",
dst);
}
if (new_attached)
eapol_sm_notify_ctrl_attached(wpa_s->eapol);
}
static VOID WINAPI ctrl_iface_read_completed(DWORD err, DWORD bytes,
LPOVERLAPPED overlap)
{
struct wpa_ctrl_dst *dst = (struct wpa_ctrl_dst *) overlap;
wpa_printf(MSG_DEBUG, "CTRL: Overlapped read completed: dst=%p err=%d "
"bytes=%d", dst, (int) err, (int) bytes);
if (err == 0 && bytes > 0)
wpa_supplicant_ctrl_iface_rx(dst, bytes);
}
static void wpa_supplicant_ctrl_iface_receive(void *eloop_data, void *user_ctx)
{
struct wpa_ctrl_dst *dst = eloop_data;
struct ctrl_iface_priv *priv = dst->priv;
DWORD bytes;
wpa_printf(MSG_DEBUG, "CTRL: wpa_supplicant_ctrl_iface_receive");
ResetEvent(dst->overlap.hEvent);
if (!GetOverlappedResult(dst->pipe, &dst->overlap, &bytes, FALSE)) {
wpa_printf(MSG_DEBUG, "CTRL: GetOverlappedResult failed: %d",
(int) GetLastError());
return;
}
wpa_printf(MSG_DEBUG, "CTRL: GetOverlappedResult: New client "
"connected");
/* Open a new named pipe for the next client. */
ctrl_open_pipe(priv);
/* Use write completion function to start reading a command */
ctrl_iface_write_completed(0, 0, &dst->overlap);
ctrl_flush_broken_pipes(priv);
}
static int ctrl_iface_parse(struct ctrl_iface_priv *priv, const char *params)
{
const char *sddl = NULL;
TCHAR *t_sddl;
if (os_strncmp(params, "SDDL=", 5) == 0)
sddl = params + 5;
if (!sddl) {
sddl = os_strstr(params, " SDDL=");
if (sddl)
sddl += 6;
}
if (!sddl)
return 0;
wpa_printf(MSG_DEBUG, "CTRL: SDDL='%s'", sddl);
os_memset(&priv->attr, 0, sizeof(priv->attr));
priv->attr.nLength = sizeof(priv->attr);
priv->attr.bInheritHandle = FALSE;
t_sddl = wpa_strdup_tchar(sddl);
if (t_sddl == NULL)
return -1;
if (!ConvertStringSecurityDescriptorToSecurityDescriptor(
t_sddl, SDDL_REVISION_1,
(PSECURITY_DESCRIPTOR *) (void *)
&priv->attr.lpSecurityDescriptor,
NULL)) {
os_free(t_sddl);
wpa_printf(MSG_ERROR, "CTRL: SDDL='%s' - could not convert to "
"security descriptor: %d",
sddl, (int) GetLastError());
return -1;
}
os_free(t_sddl);
priv->sec_attr_set = 1;
return 0;
}
static void wpa_supplicant_ctrl_iface_msg_cb(void *ctx, int level,
const char *txt, size_t len)
{
struct wpa_supplicant *wpa_s = ctx;
if (wpa_s == NULL || wpa_s->ctrl_iface == NULL)
return;
wpa_supplicant_ctrl_iface_send(wpa_s->ctrl_iface, level, txt, len);
}
struct ctrl_iface_priv *
wpa_supplicant_ctrl_iface_init(struct wpa_supplicant *wpa_s)
{
struct ctrl_iface_priv *priv;
priv = os_zalloc(sizeof(*priv));
if (priv == NULL)
return NULL;
priv->wpa_s = wpa_s;
if (wpa_s->conf->ctrl_interface == NULL)
return priv;
if (ctrl_iface_parse(priv, wpa_s->conf->ctrl_interface) < 0) {
os_free(priv);
return NULL;
}
if (ctrl_open_pipe(priv) < 0) {
os_free(priv);
return NULL;
}
wpa_msg_register_cb(wpa_supplicant_ctrl_iface_msg_cb);
return priv;
}
void wpa_supplicant_ctrl_iface_deinit(struct ctrl_iface_priv *priv)
{
while (priv->ctrl_dst)
ctrl_close_pipe(priv->ctrl_dst);
if (priv->sec_attr_set)
LocalFree(priv->attr.lpSecurityDescriptor);
os_free(priv);
}
static void wpa_supplicant_ctrl_iface_send(struct ctrl_iface_priv *priv,
int level, const char *buf,
size_t len)
{
struct wpa_ctrl_dst *dst, *next;
char levelstr[10];
int idx;
char *sbuf;
int llen;
DWORD written;
dst = priv->ctrl_dst;
if (dst == NULL)
return;
os_snprintf(levelstr, sizeof(levelstr), "<%d>", level);
llen = os_strlen(levelstr);
sbuf = os_malloc(llen + len);
if (sbuf == NULL)
return;
os_memcpy(sbuf, levelstr, llen);
os_memcpy(sbuf + llen, buf, len);
idx = 0;
while (dst) {
next = dst->next;
if (dst->attached && level >= dst->debug_level) {
wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor send %p",
dst);
if (!WriteFile(dst->pipe, sbuf, llen + len, &written,
NULL)) {
wpa_printf(MSG_DEBUG, "CTRL: WriteFile to dst "
"%p failed: %d",
dst, (int) GetLastError());
dst->errors++;
if (dst->errors > 10)
ctrl_close_pipe(dst);
} else
dst->errors = 0;
}
idx++;
dst = next;
}
os_free(sbuf);
}
void wpa_supplicant_ctrl_iface_wait(struct ctrl_iface_priv *priv)
{
wpa_printf(MSG_DEBUG, "CTRL_IFACE - %s - wait for monitor",
priv->wpa_s->ifname);
if (priv->ctrl_dst == NULL)
return;
WaitForSingleObject(priv->ctrl_dst->pipe, INFINITE);
}
/* Global ctrl_iface */
struct ctrl_iface_global_priv;
struct wpa_global_dst {
/* Note: OVERLAPPED must be the first member of struct wpa_global_dst
*/
OVERLAPPED overlap;
struct wpa_global_dst *next, *prev;
struct ctrl_iface_global_priv *priv;
HANDLE pipe;
char req_buf[REQUEST_BUFSIZE];
char *rsp_buf;
int used;
};
struct ctrl_iface_global_priv {
struct wpa_global *global;
struct wpa_global_dst *ctrl_dst;
};
static void global_flush_broken_pipes(struct ctrl_iface_global_priv *priv)
{
struct wpa_global_dst *dst, *next;
dst = priv->ctrl_dst;
while (dst) {
next = dst->next;
if (ctrl_broken_pipe(dst->pipe, dst->used)) {
wpa_printf(MSG_DEBUG, "CTRL: closing broken pipe %p",
dst);
global_close_pipe(dst);
}
dst = next;
}
}
static int global_open_pipe(struct ctrl_iface_global_priv *priv)
{
struct wpa_global_dst *dst;
DWORD err;
dst = os_zalloc(sizeof(*dst));
if (dst == NULL)
return -1;
wpa_printf(MSG_DEBUG, "CTRL: Open pipe %p", dst);
dst->priv = priv;
dst->pipe = INVALID_HANDLE_VALUE;
dst->overlap.hEvent = CreateEvent(NULL, TRUE, TRUE, NULL);
if (dst->overlap.hEvent == NULL) {
wpa_printf(MSG_ERROR, "CTRL: CreateEvent failed: %d",
(int) GetLastError());
goto fail;
}
eloop_register_event(dst->overlap.hEvent,
sizeof(dst->overlap.hEvent),
wpa_supplicant_global_iface_receive, dst, NULL);
/* TODO: add support for configuring access list for the pipe */
dst->pipe = CreateNamedPipe(NAMED_PIPE_PREFIX,
PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
PIPE_TYPE_MESSAGE |
PIPE_READMODE_MESSAGE |
PIPE_WAIT,
10, REPLY_BUFSIZE, REQUEST_BUFSIZE,
1000, NULL);
if (dst->pipe == INVALID_HANDLE_VALUE) {
wpa_printf(MSG_ERROR, "CTRL: CreateNamedPipe failed: %d",
(int) GetLastError());
goto fail;
}
if (ConnectNamedPipe(dst->pipe, &dst->overlap)) {
wpa_printf(MSG_ERROR, "CTRL: ConnectNamedPipe failed: %d",
(int) GetLastError());
CloseHandle(dst->pipe);
os_free(dst);
return -1;
}
err = GetLastError();
switch (err) {
case ERROR_IO_PENDING:
wpa_printf(MSG_DEBUG, "CTRL: ConnectNamedPipe: connection in "
"progress");
break;
case ERROR_PIPE_CONNECTED:
wpa_printf(MSG_DEBUG, "CTRL: ConnectNamedPipe: already "
"connected");
if (SetEvent(dst->overlap.hEvent))
break;
/* fall through */
default:
wpa_printf(MSG_DEBUG, "CTRL: ConnectNamedPipe error: %d",
(int) err);
CloseHandle(dst->pipe);
os_free(dst);
return -1;
}
dst->next = priv->ctrl_dst;
if (dst->next)
dst->next->prev = dst;
priv->ctrl_dst = dst;
return 0;
fail:
global_close_pipe(dst);
return -1;
}
static void global_close_pipe(struct wpa_global_dst *dst)
{
wpa_printf(MSG_DEBUG, "CTRL: close pipe %p", dst);
if (dst->overlap.hEvent) {
eloop_unregister_event(dst->overlap.hEvent,
sizeof(dst->overlap.hEvent));
CloseHandle(dst->overlap.hEvent);
}
if (dst->pipe != INVALID_HANDLE_VALUE) {
/*
* Could use FlushFileBuffers() here to guarantee that all data
* gets delivered to the client, but that can block, so let's
* not do this for now.
* FlushFileBuffers(dst->pipe);
*/
CloseHandle(dst->pipe);
}
if (dst->prev)
dst->prev->next = dst->next;
else
dst->priv->ctrl_dst = dst->next;
if (dst->next)
dst->next->prev = dst->prev;
os_free(dst->rsp_buf);
os_free(dst);
}
static VOID WINAPI global_iface_write_completed(DWORD err, DWORD bytes,
LPOVERLAPPED overlap)
{
struct wpa_global_dst *dst = (struct wpa_global_dst *) overlap;
wpa_printf(MSG_DEBUG, "CTRL: Overlapped write completed: dst=%p "
"err=%d bytes=%d", dst, (int) err, (int) bytes);
if (err) {
global_close_pipe(dst);
return;
}
os_free(dst->rsp_buf);
dst->rsp_buf = NULL;
if (!ReadFileEx(dst->pipe, dst->req_buf, sizeof(dst->req_buf),
&dst->overlap, global_iface_read_completed)) {
wpa_printf(MSG_DEBUG, "CTRL: ReadFileEx failed: %d",
(int) GetLastError());
global_close_pipe(dst);
/* FIX: if this was the pipe waiting for new global
* connections, at this point there are no open global pipes..
* Should try to open a new pipe.. */
return;
}
wpa_printf(MSG_DEBUG, "CTRL: Overlapped read started for %p", dst);
}
static void wpa_supplicant_global_iface_rx(struct wpa_global_dst *dst,
size_t len)
{
struct wpa_global *global = dst->priv->global;
char *reply = NULL, *send_buf;
size_t reply_len = 0, send_len;
char *buf = dst->req_buf;
dst->used = 1;
if (len >= REQUEST_BUFSIZE)
len = REQUEST_BUFSIZE - 1;
buf[len] = '\0';
reply = wpa_supplicant_global_ctrl_iface_process(global, buf,
&reply_len);
if (reply) {
send_buf = reply;
send_len = reply_len;
} else if (reply_len) {
send_buf = "FAIL\n";
send_len = 5;
} else {
os_free(dst->rsp_buf);
dst->rsp_buf = NULL;
return;
}
os_free(dst->rsp_buf);
dst->rsp_buf = os_malloc(send_len);
if (dst->rsp_buf == NULL) {
global_close_pipe(dst);
os_free(reply);
return;
}
os_memcpy(dst->rsp_buf, send_buf, send_len);
os_free(reply);
if (!WriteFileEx(dst->pipe, dst->rsp_buf, send_len, &dst->overlap,
global_iface_write_completed)) {
wpa_printf(MSG_DEBUG, "CTRL: WriteFileEx failed: %d",
(int) GetLastError());
global_close_pipe(dst);
} else {
wpa_printf(MSG_DEBUG, "CTRL: Overlapped write started for %p",
dst);
}
}
static VOID WINAPI global_iface_read_completed(DWORD err, DWORD bytes,
LPOVERLAPPED overlap)
{
struct wpa_global_dst *dst = (struct wpa_global_dst *) overlap;
wpa_printf(MSG_DEBUG, "CTRL: Overlapped read completed: dst=%p err=%d "
"bytes=%d", dst, (int) err, (int) bytes);
if (err == 0 && bytes > 0)
wpa_supplicant_global_iface_rx(dst, bytes);
}
static void wpa_supplicant_global_iface_receive(void *eloop_data,
void *user_ctx)
{
struct wpa_global_dst *dst = eloop_data;
struct ctrl_iface_global_priv *priv = dst->priv;
DWORD bytes;
wpa_printf(MSG_DEBUG, "CTRL: wpa_supplicant_global_iface_receive");
ResetEvent(dst->overlap.hEvent);
if (!GetOverlappedResult(dst->pipe, &dst->overlap, &bytes, FALSE)) {
wpa_printf(MSG_DEBUG, "CTRL: GetOverlappedResult failed: %d",
(int) GetLastError());
return;
}
wpa_printf(MSG_DEBUG, "CTRL: GetOverlappedResult: New client "
"connected");
/* Open a new named pipe for the next client. */
if (global_open_pipe(priv) < 0) {
wpa_printf(MSG_DEBUG, "CTRL: global_open_pipe failed");
return;
}
/* Use write completion function to start reading a command */
global_iface_write_completed(0, 0, &dst->overlap);
global_flush_broken_pipes(priv);
}
struct ctrl_iface_global_priv *
wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global)
{
struct ctrl_iface_global_priv *priv;
priv = os_zalloc(sizeof(*priv));
if (priv == NULL)
return NULL;
priv->global = global;
if (global_open_pipe(priv) < 0) {
os_free(priv);
return NULL;
}
return priv;
}
void
wpa_supplicant_global_ctrl_iface_deinit(struct ctrl_iface_global_priv *priv)
{
while (priv->ctrl_dst)
global_close_pipe(priv->ctrl_dst);
os_free(priv);
}
|