1 #include "sysdeps.h"
2 #include <windows.h>
3 #include <winsock2.h>
4 #include <stdio.h>
5 #include <errno.h>
6 #define TRACE_TAG TRACE_SYSDEPS
7 #include "adb.h"
8
9 extern void fatal(const char *fmt, ...);
10
11 #define assert(cond) do { if (!(cond)) fatal( "assertion failed '%s' on %s:%ld\n", #cond, __FILE__, __LINE__ ); } while (0)
12
13 /**************************************************************************/
14 /**************************************************************************/
15 /***** *****/
16 /***** replaces libs/cutils/load_file.c *****/
17 /***** *****/
18 /**************************************************************************/
19 /**************************************************************************/
20
load_file(const char * fn,unsigned * _sz)21 void *load_file(const char *fn, unsigned *_sz)
22 {
23 HANDLE file;
24 char *data;
25 DWORD file_size;
26
27 file = CreateFile( fn,
28 GENERIC_READ,
29 FILE_SHARE_READ,
30 NULL,
31 OPEN_EXISTING,
32 0,
33 NULL );
34
35 if (file == INVALID_HANDLE_VALUE)
36 return NULL;
37
38 file_size = GetFileSize( file, NULL );
39 data = NULL;
40
41 if (file_size > 0) {
42 data = (char*) malloc( file_size + 1 );
43 if (data == NULL) {
44 D("load_file: could not allocate %ld bytes\n", file_size );
45 file_size = 0;
46 } else {
47 DWORD out_bytes;
48
49 if ( !ReadFile( file, data, file_size, &out_bytes, NULL ) ||
50 out_bytes != file_size )
51 {
52 D("load_file: could not read %ld bytes from '%s'\n", file_size, fn);
53 free(data);
54 data = NULL;
55 file_size = 0;
56 }
57 }
58 }
59 CloseHandle( file );
60
61 *_sz = (unsigned) file_size;
62 return data;
63 }
64
65 /**************************************************************************/
66 /**************************************************************************/
67 /***** *****/
68 /***** common file descriptor handling *****/
69 /***** *****/
70 /**************************************************************************/
71 /**************************************************************************/
72
73 typedef const struct FHClassRec_* FHClass;
74
75 typedef struct FHRec_* FH;
76
77 typedef struct EventHookRec_* EventHook;
78
79 typedef struct FHClassRec_
80 {
81 void (*_fh_init) ( FH f );
82 int (*_fh_close)( FH f );
83 int (*_fh_lseek)( FH f, int pos, int origin );
84 int (*_fh_read) ( FH f, void* buf, int len );
85 int (*_fh_write)( FH f, const void* buf, int len );
86 void (*_fh_hook) ( FH f, int events, EventHook hook );
87
88 } FHClassRec;
89
90 /* used to emulate unix-domain socket pairs */
91 typedef struct SocketPairRec_* SocketPair;
92
93 typedef struct FHRec_
94 {
95 FHClass clazz;
96 int used;
97 int eof;
98 union {
99 HANDLE handle;
100 SOCKET socket;
101 SocketPair pair;
102 } u;
103
104 HANDLE event;
105 int mask;
106
107 char name[32];
108
109 } FHRec;
110
111 #define fh_handle u.handle
112 #define fh_socket u.socket
113 #define fh_pair u.pair
114
115 #define WIN32_FH_BASE 100
116
117 #define WIN32_MAX_FHS 128
118
119 static adb_mutex_t _win32_lock;
120 static FHRec _win32_fhs[ WIN32_MAX_FHS ];
121 static int _win32_fh_count;
122
123 static FH
_fh_from_int(int fd)124 _fh_from_int( int fd )
125 {
126 FH f;
127
128 fd -= WIN32_FH_BASE;
129
130 if (fd < 0 || fd >= _win32_fh_count) {
131 D( "_fh_from_int: invalid fd %d\n", fd + WIN32_FH_BASE );
132 errno = EBADF;
133 return NULL;
134 }
135
136 f = &_win32_fhs[fd];
137
138 if (f->used == 0) {
139 D( "_fh_from_int: invalid fd %d\n", fd + WIN32_FH_BASE );
140 errno = EBADF;
141 return NULL;
142 }
143
144 return f;
145 }
146
147
148 static int
_fh_to_int(FH f)149 _fh_to_int( FH f )
150 {
151 if (f && f->used && f >= _win32_fhs && f < _win32_fhs + WIN32_MAX_FHS)
152 return (int)(f - _win32_fhs) + WIN32_FH_BASE;
153
154 return -1;
155 }
156
157 static FH
_fh_alloc(FHClass clazz)158 _fh_alloc( FHClass clazz )
159 {
160 int nn;
161 FH f = NULL;
162
163 adb_mutex_lock( &_win32_lock );
164
165 if (_win32_fh_count < WIN32_MAX_FHS) {
166 f = &_win32_fhs[ _win32_fh_count++ ];
167 goto Exit;
168 }
169
170 for (nn = 0; nn < WIN32_MAX_FHS; nn++) {
171 if ( _win32_fhs[nn].clazz == NULL) {
172 f = &_win32_fhs[nn];
173 goto Exit;
174 }
175 }
176 D( "_fh_alloc: no more free file descriptors\n" );
177 Exit:
178 if (f) {
179 f->clazz = clazz;
180 f->used = 1;
181 f->eof = 0;
182 clazz->_fh_init(f);
183 }
184 adb_mutex_unlock( &_win32_lock );
185 return f;
186 }
187
188
189 static int
_fh_close(FH f)190 _fh_close( FH f )
191 {
192 if ( f->used ) {
193 f->clazz->_fh_close( f );
194 f->used = 0;
195 f->eof = 0;
196 f->clazz = NULL;
197 }
198 return 0;
199 }
200
201 /* forward definitions */
202 static const FHClassRec _fh_file_class;
203 static const FHClassRec _fh_socket_class;
204
205 /**************************************************************************/
206 /**************************************************************************/
207 /***** *****/
208 /***** file-based descriptor handling *****/
209 /***** *****/
210 /**************************************************************************/
211 /**************************************************************************/
212
213 static void
_fh_file_init(FH f)214 _fh_file_init( FH f )
215 {
216 f->fh_handle = INVALID_HANDLE_VALUE;
217 }
218
219 static int
_fh_file_close(FH f)220 _fh_file_close( FH f )
221 {
222 CloseHandle( f->fh_handle );
223 f->fh_handle = INVALID_HANDLE_VALUE;
224 return 0;
225 }
226
227 static int
_fh_file_read(FH f,void * buf,int len)228 _fh_file_read( FH f, void* buf, int len )
229 {
230 DWORD read_bytes;
231
232 if ( !ReadFile( f->fh_handle, buf, (DWORD)len, &read_bytes, NULL ) ) {
233 D( "adb_read: could not read %d bytes from %s\n", len, f->name );
234 errno = EIO;
235 return -1;
236 } else if (read_bytes < (DWORD)len) {
237 f->eof = 1;
238 }
239 return (int)read_bytes;
240 }
241
242 static int
_fh_file_write(FH f,const void * buf,int len)243 _fh_file_write( FH f, const void* buf, int len )
244 {
245 DWORD wrote_bytes;
246
247 if ( !WriteFile( f->fh_handle, buf, (DWORD)len, &wrote_bytes, NULL ) ) {
248 D( "adb_file_write: could not write %d bytes from %s\n", len, f->name );
249 errno = EIO;
250 return -1;
251 } else if (wrote_bytes < (DWORD)len) {
252 f->eof = 1;
253 }
254 return (int)wrote_bytes;
255 }
256
257 static int
_fh_file_lseek(FH f,int pos,int origin)258 _fh_file_lseek( FH f, int pos, int origin )
259 {
260 DWORD method;
261 DWORD result;
262
263 switch (origin)
264 {
265 case SEEK_SET: method = FILE_BEGIN; break;
266 case SEEK_CUR: method = FILE_CURRENT; break;
267 case SEEK_END: method = FILE_END; break;
268 default:
269 errno = EINVAL;
270 return -1;
271 }
272
273 result = SetFilePointer( f->fh_handle, pos, NULL, method );
274 if (result == INVALID_SET_FILE_POINTER) {
275 errno = EIO;
276 return -1;
277 } else {
278 f->eof = 0;
279 }
280 return (int)result;
281 }
282
283 static void _fh_file_hook( FH f, int event, EventHook eventhook ); /* forward */
284
285 static const FHClassRec _fh_file_class =
286 {
287 _fh_file_init,
288 _fh_file_close,
289 _fh_file_lseek,
290 _fh_file_read,
291 _fh_file_write,
292 _fh_file_hook
293 };
294
295 /**************************************************************************/
296 /**************************************************************************/
297 /***** *****/
298 /***** file-based descriptor handling *****/
299 /***** *****/
300 /**************************************************************************/
301 /**************************************************************************/
302
adb_open(const char * path,int options)303 int adb_open(const char* path, int options)
304 {
305 FH f;
306
307 DWORD desiredAccess = 0;
308 DWORD shareMode = FILE_SHARE_READ | FILE_SHARE_WRITE;
309
310 switch (options) {
311 case O_RDONLY:
312 desiredAccess = GENERIC_READ;
313 break;
314 case O_WRONLY:
315 desiredAccess = GENERIC_WRITE;
316 break;
317 case O_RDWR:
318 desiredAccess = GENERIC_READ | GENERIC_WRITE;
319 break;
320 default:
321 D("adb_open: invalid options (0x%0x)\n", options);
322 errno = EINVAL;
323 return -1;
324 }
325
326 f = _fh_alloc( &_fh_file_class );
327 if ( !f ) {
328 errno = ENOMEM;
329 return -1;
330 }
331
332 f->fh_handle = CreateFile( path, desiredAccess, shareMode, NULL, OPEN_EXISTING,
333 0, NULL );
334
335 if ( f->fh_handle == INVALID_HANDLE_VALUE ) {
336 _fh_close(f);
337 D( "adb_open: could not open '%s':", path );
338 switch (GetLastError()) {
339 case ERROR_FILE_NOT_FOUND:
340 D( "file not found\n" );
341 errno = ENOENT;
342 return -1;
343
344 case ERROR_PATH_NOT_FOUND:
345 D( "path not found\n" );
346 errno = ENOTDIR;
347 return -1;
348
349 default:
350 D( "unknown error\n" );
351 errno = ENOENT;
352 return -1;
353 }
354 }
355
356 snprintf( f->name, sizeof(f->name), "%d(%s)", _fh_to_int(f), path );
357 D( "adb_open: '%s' => fd %d\n", path, _fh_to_int(f) );
358 return _fh_to_int(f);
359 }
360
361 /* ignore mode on Win32 */
adb_creat(const char * path,int mode)362 int adb_creat(const char* path, int mode)
363 {
364 FH f;
365
366 f = _fh_alloc( &_fh_file_class );
367 if ( !f ) {
368 errno = ENOMEM;
369 return -1;
370 }
371
372 f->fh_handle = CreateFile( path, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE,
373 NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,
374 NULL );
375
376 if ( f->fh_handle == INVALID_HANDLE_VALUE ) {
377 _fh_close(f);
378 D( "adb_creat: could not open '%s':", path );
379 switch (GetLastError()) {
380 case ERROR_FILE_NOT_FOUND:
381 D( "file not found\n" );
382 errno = ENOENT;
383 return -1;
384
385 case ERROR_PATH_NOT_FOUND:
386 D( "path not found\n" );
387 errno = ENOTDIR;
388 return -1;
389
390 default:
391 D( "unknown error\n" );
392 errno = ENOENT;
393 return -1;
394 }
395 }
396 snprintf( f->name, sizeof(f->name), "%d(%s)", _fh_to_int(f), path );
397 D( "adb_creat: '%s' => fd %d\n", path, _fh_to_int(f) );
398 return _fh_to_int(f);
399 }
400
401
adb_read(int fd,void * buf,int len)402 int adb_read(int fd, void* buf, int len)
403 {
404 FH f = _fh_from_int(fd);
405
406 if (f == NULL) {
407 return -1;
408 }
409
410 return f->clazz->_fh_read( f, buf, len );
411 }
412
413
adb_write(int fd,const void * buf,int len)414 int adb_write(int fd, const void* buf, int len)
415 {
416 FH f = _fh_from_int(fd);
417
418 if (f == NULL) {
419 return -1;
420 }
421
422 return f->clazz->_fh_write(f, buf, len);
423 }
424
425
adb_lseek(int fd,int pos,int where)426 int adb_lseek(int fd, int pos, int where)
427 {
428 FH f = _fh_from_int(fd);
429
430 if (!f) {
431 return -1;
432 }
433
434 return f->clazz->_fh_lseek(f, pos, where);
435 }
436
437
adb_shutdown(int fd)438 int adb_shutdown(int fd)
439 {
440 FH f = _fh_from_int(fd);
441
442 if (!f) {
443 return -1;
444 }
445
446 D( "adb_shutdown: %s\n", f->name);
447 shutdown( f->fh_socket, SD_BOTH );
448 return 0;
449 }
450
451
adb_close(int fd)452 int adb_close(int fd)
453 {
454 FH f = _fh_from_int(fd);
455
456 if (!f) {
457 return -1;
458 }
459
460 D( "adb_close: %s\n", f->name);
461 _fh_close(f);
462 return 0;
463 }
464
465 /**************************************************************************/
466 /**************************************************************************/
467 /***** *****/
468 /***** socket-based file descriptors *****/
469 /***** *****/
470 /**************************************************************************/
471 /**************************************************************************/
472
473 static void
_socket_set_errno(void)474 _socket_set_errno( void )
475 {
476 switch (WSAGetLastError()) {
477 case 0: errno = 0; break;
478 case WSAEWOULDBLOCK: errno = EAGAIN; break;
479 case WSAEINTR: errno = EINTR; break;
480 default:
481 D( "_socket_set_errno: unhandled value %d\n", WSAGetLastError() );
482 errno = EINVAL;
483 }
484 }
485
486 static void
_fh_socket_init(FH f)487 _fh_socket_init( FH f )
488 {
489 f->fh_socket = INVALID_SOCKET;
490 f->event = WSACreateEvent();
491 f->mask = 0;
492 }
493
494 static int
_fh_socket_close(FH f)495 _fh_socket_close( FH f )
496 {
497 /* gently tell any peer that we're closing the socket */
498 shutdown( f->fh_socket, SD_BOTH );
499 closesocket( f->fh_socket );
500 f->fh_socket = INVALID_SOCKET;
501 CloseHandle( f->event );
502 f->mask = 0;
503 return 0;
504 }
505
506 static int
_fh_socket_lseek(FH f,int pos,int origin)507 _fh_socket_lseek( FH f, int pos, int origin )
508 {
509 errno = EPIPE;
510 return -1;
511 }
512
513 static int
_fh_socket_read(FH f,void * buf,int len)514 _fh_socket_read( FH f, void* buf, int len )
515 {
516 int result = recv( f->fh_socket, buf, len, 0 );
517 if (result == SOCKET_ERROR) {
518 _socket_set_errno();
519 result = -1;
520 }
521 return result;
522 }
523
524 static int
_fh_socket_write(FH f,const void * buf,int len)525 _fh_socket_write( FH f, const void* buf, int len )
526 {
527 int result = send( f->fh_socket, buf, len, 0 );
528 if (result == SOCKET_ERROR) {
529 _socket_set_errno();
530 result = -1;
531 }
532 return result;
533 }
534
535 static void _fh_socket_hook( FH f, int event, EventHook hook ); /* forward */
536
537 static const FHClassRec _fh_socket_class =
538 {
539 _fh_socket_init,
540 _fh_socket_close,
541 _fh_socket_lseek,
542 _fh_socket_read,
543 _fh_socket_write,
544 _fh_socket_hook
545 };
546
547 /**************************************************************************/
548 /**************************************************************************/
549 /***** *****/
550 /***** replacement for libs/cutils/socket_xxxx.c *****/
551 /***** *****/
552 /**************************************************************************/
553 /**************************************************************************/
554
555 #include <winsock2.h>
556
557 static int _winsock_init;
558
559 static void
_cleanup_winsock(void)560 _cleanup_winsock( void )
561 {
562 WSACleanup();
563 }
564
565 static void
_init_winsock(void)566 _init_winsock( void )
567 {
568 if (!_winsock_init) {
569 WSADATA wsaData;
570 int rc = WSAStartup( MAKEWORD(2,2), &wsaData);
571 if (rc != 0) {
572 fatal( "adb: could not initialize Winsock\n" );
573 }
574 atexit( _cleanup_winsock );
575 _winsock_init = 1;
576 }
577 }
578
socket_loopback_client(int port,int type)579 int socket_loopback_client(int port, int type)
580 {
581 FH f = _fh_alloc( &_fh_socket_class );
582 struct sockaddr_in addr;
583 SOCKET s;
584
585 if (!f)
586 return -1;
587
588 if (!_winsock_init)
589 _init_winsock();
590
591 memset(&addr, 0, sizeof(addr));
592 addr.sin_family = AF_INET;
593 addr.sin_port = htons(port);
594 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
595
596 s = socket(AF_INET, type, 0);
597 if(s == INVALID_SOCKET) {
598 D("socket_loopback_client: could not create socket\n" );
599 _fh_close(f);
600 return -1;
601 }
602
603 f->fh_socket = s;
604 if(connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
605 D("socket_loopback_client: could not connect to %s:%d\n", type != SOCK_STREAM ? "udp" : "tcp", port );
606 _fh_close(f);
607 return -1;
608 }
609 snprintf( f->name, sizeof(f->name), "%d(lo-client:%s%d)", _fh_to_int(f), type != SOCK_STREAM ? "udp:" : "", port );
610 D( "socket_loopback_client: port %d type %s => fd %d\n", port, type != SOCK_STREAM ? "udp" : "tcp", _fh_to_int(f) );
611 return _fh_to_int(f);
612 }
613
614 #define LISTEN_BACKLOG 4
615
socket_loopback_server(int port,int type)616 int socket_loopback_server(int port, int type)
617 {
618 FH f = _fh_alloc( &_fh_socket_class );
619 struct sockaddr_in addr;
620 SOCKET s;
621 int n;
622
623 if (!f) {
624 return -1;
625 }
626
627 if (!_winsock_init)
628 _init_winsock();
629
630 memset(&addr, 0, sizeof(addr));
631 addr.sin_family = AF_INET;
632 addr.sin_port = htons(port);
633 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
634
635 s = socket(AF_INET, type, 0);
636 if(s == INVALID_SOCKET) return -1;
637
638 f->fh_socket = s;
639
640 n = 1;
641 setsockopt(s, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (const char*)&n, sizeof(n));
642
643 if(bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
644 _fh_close(f);
645 return -1;
646 }
647 if (type == SOCK_STREAM) {
648 int ret;
649
650 ret = listen(s, LISTEN_BACKLOG);
651 if (ret < 0) {
652 _fh_close(f);
653 return -1;
654 }
655 }
656 snprintf( f->name, sizeof(f->name), "%d(lo-server:%s%d)", _fh_to_int(f), type != SOCK_STREAM ? "udp:" : "", port );
657 D( "socket_loopback_server: port %d type %s => fd %d\n", port, type != SOCK_STREAM ? "udp" : "tcp", _fh_to_int(f) );
658 return _fh_to_int(f);
659 }
660
661
socket_network_client(const char * host,int port,int type)662 int socket_network_client(const char *host, int port, int type)
663 {
664 FH f = _fh_alloc( &_fh_socket_class );
665 struct hostent *hp;
666 struct sockaddr_in addr;
667 SOCKET s;
668
669 if (!f)
670 return -1;
671
672 if (!_winsock_init)
673 _init_winsock();
674
675 hp = gethostbyname(host);
676 if(hp == 0) {
677 _fh_close(f);
678 return -1;
679 }
680
681 memset(&addr, 0, sizeof(addr));
682 addr.sin_family = hp->h_addrtype;
683 addr.sin_port = htons(port);
684 memcpy(&addr.sin_addr, hp->h_addr, hp->h_length);
685
686 s = socket(hp->h_addrtype, type, 0);
687 if(s == INVALID_SOCKET) {
688 _fh_close(f);
689 return -1;
690 }
691 f->fh_socket = s;
692
693 if(connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
694 _fh_close(f);
695 return -1;
696 }
697
698 snprintf( f->name, sizeof(f->name), "%d(net-client:%s%d)", _fh_to_int(f), type != SOCK_STREAM ? "udp:" : "", port );
699 D( "socket_network_client: host '%s' port %d type %s => fd %d\n", host, port, type != SOCK_STREAM ? "udp" : "tcp", _fh_to_int(f) );
700 return _fh_to_int(f);
701 }
702
703
socket_inaddr_any_server(int port,int type)704 int socket_inaddr_any_server(int port, int type)
705 {
706 FH f = _fh_alloc( &_fh_socket_class );
707 struct sockaddr_in addr;
708 SOCKET s;
709 int n;
710
711 if (!f)
712 return -1;
713
714 if (!_winsock_init)
715 _init_winsock();
716
717 memset(&addr, 0, sizeof(addr));
718 addr.sin_family = AF_INET;
719 addr.sin_port = htons(port);
720 addr.sin_addr.s_addr = htonl(INADDR_ANY);
721
722 s = socket(AF_INET, type, 0);
723 if(s == INVALID_SOCKET) {
724 _fh_close(f);
725 return -1;
726 }
727
728 f->fh_socket = s;
729 n = 1;
730 setsockopt(s, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (const char*)&n, sizeof(n));
731
732 if(bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
733 _fh_close(f);
734 return -1;
735 }
736
737 if (type == SOCK_STREAM) {
738 int ret;
739
740 ret = listen(s, LISTEN_BACKLOG);
741 if (ret < 0) {
742 _fh_close(f);
743 return -1;
744 }
745 }
746 snprintf( f->name, sizeof(f->name), "%d(any-server:%s%d)", _fh_to_int(f), type != SOCK_STREAM ? "udp:" : "", port );
747 D( "socket_inaddr_server: port %d type %s => fd %d\n", port, type != SOCK_STREAM ? "udp" : "tcp", _fh_to_int(f) );
748 return _fh_to_int(f);
749 }
750
751 #undef accept
adb_socket_accept(int serverfd,struct sockaddr * addr,socklen_t * addrlen)752 int adb_socket_accept(int serverfd, struct sockaddr* addr, socklen_t *addrlen)
753 {
754 FH serverfh = _fh_from_int(serverfd);
755 FH fh;
756
757 if ( !serverfh || serverfh->clazz != &_fh_socket_class ) {
758 D( "adb_socket_accept: invalid fd %d\n", serverfd );
759 return -1;
760 }
761
762 fh = _fh_alloc( &_fh_socket_class );
763 if (!fh) {
764 D( "adb_socket_accept: not enough memory to allocate accepted socket descriptor\n" );
765 return -1;
766 }
767
768 fh->fh_socket = accept( serverfh->fh_socket, addr, addrlen );
769 if (fh->fh_socket == INVALID_SOCKET) {
770 _fh_close( fh );
771 D( "adb_socket_accept: accept on fd %d return error %ld\n", serverfd, GetLastError() );
772 return -1;
773 }
774
775 snprintf( fh->name, sizeof(fh->name), "%d(accept:%s)", _fh_to_int(fh), serverfh->name );
776 D( "adb_socket_accept on fd %d returns fd %d\n", serverfd, _fh_to_int(fh) );
777 return _fh_to_int(fh);
778 }
779
780
disable_tcp_nagle(int fd)781 void disable_tcp_nagle(int fd)
782 {
783 FH fh = _fh_from_int(fd);
784 int on;
785
786 if ( !fh || fh->clazz != &_fh_socket_class )
787 return;
788
789 setsockopt( fh->fh_socket, IPPROTO_TCP, TCP_NODELAY, (const char*)&on, sizeof(on) );
790 }
791
792 /**************************************************************************/
793 /**************************************************************************/
794 /***** *****/
795 /***** emulated socketpairs *****/
796 /***** *****/
797 /**************************************************************************/
798 /**************************************************************************/
799
800 /* we implement socketpairs directly in use space for the following reasons:
801 * - it avoids copying data from/to the Nt kernel
802 * - it allows us to implement fdevent hooks easily and cheaply, something
803 * that is not possible with standard Win32 pipes !!
804 *
805 * basically, we use two circular buffers, each one corresponding to a given
806 * direction.
807 *
808 * each buffer is implemented as two regions:
809 *
810 * region A which is (a_start,a_end)
811 * region B which is (0, b_end) with b_end <= a_start
812 *
813 * an empty buffer has: a_start = a_end = b_end = 0
814 *
815 * a_start is the pointer where we start reading data
816 * a_end is the pointer where we start writing data, unless it is BUFFER_SIZE,
817 * then you start writing at b_end
818 *
819 * the buffer is full when b_end == a_start && a_end == BUFFER_SIZE
820 *
821 * there is room when b_end < a_start || a_end < BUFER_SIZE
822 *
823 * when reading, a_start is incremented, it a_start meets a_end, then
824 * we do: a_start = 0, a_end = b_end, b_end = 0, and keep going on..
825 */
826
827 #define BIP_BUFFER_SIZE 4096
828
829 #if 0
830 #include <stdio.h>
831 # define BIPD(x) D x
832 # define BIPDUMP bip_dump_hex
833
834 static void bip_dump_hex( const unsigned char* ptr, size_t len )
835 {
836 int nn, len2 = len;
837
838 if (len2 > 8) len2 = 8;
839
840 for (nn = 0; nn < len2; nn++)
841 printf("%02x", ptr[nn]);
842 printf(" ");
843
844 for (nn = 0; nn < len2; nn++) {
845 int c = ptr[nn];
846 if (c < 32 || c > 127)
847 c = '.';
848 printf("%c", c);
849 }
850 printf("\n");
851 fflush(stdout);
852 }
853
854 #else
855 # define BIPD(x) do {} while (0)
856 # define BIPDUMP(p,l) BIPD(p)
857 #endif
858
859 typedef struct BipBufferRec_
860 {
861 int a_start;
862 int a_end;
863 int b_end;
864 int fdin;
865 int fdout;
866 int closed;
867 int can_write; /* boolean */
868 HANDLE evt_write; /* event signaled when one can write to a buffer */
869 int can_read; /* boolean */
870 HANDLE evt_read; /* event signaled when one can read from a buffer */
871 CRITICAL_SECTION lock;
872 unsigned char buff[ BIP_BUFFER_SIZE ];
873
874 } BipBufferRec, *BipBuffer;
875
876 static void
bip_buffer_init(BipBuffer buffer)877 bip_buffer_init( BipBuffer buffer )
878 {
879 D( "bit_buffer_init %p\n", buffer );
880 buffer->a_start = 0;
881 buffer->a_end = 0;
882 buffer->b_end = 0;
883 buffer->can_write = 1;
884 buffer->can_read = 0;
885 buffer->fdin = 0;
886 buffer->fdout = 0;
887 buffer->closed = 0;
888 buffer->evt_write = CreateEvent( NULL, TRUE, TRUE, NULL );
889 buffer->evt_read = CreateEvent( NULL, TRUE, FALSE, NULL );
890 InitializeCriticalSection( &buffer->lock );
891 }
892
893 static void
bip_buffer_close(BipBuffer bip)894 bip_buffer_close( BipBuffer bip )
895 {
896 bip->closed = 1;
897
898 if (!bip->can_read) {
899 SetEvent( bip->evt_read );
900 }
901 if (!bip->can_write) {
902 SetEvent( bip->evt_write );
903 }
904 }
905
906 static void
bip_buffer_done(BipBuffer bip)907 bip_buffer_done( BipBuffer bip )
908 {
909 BIPD(( "bip_buffer_done: %d->%d\n", bip->fdin, bip->fdout ));
910 CloseHandle( bip->evt_read );
911 CloseHandle( bip->evt_write );
912 DeleteCriticalSection( &bip->lock );
913 }
914
915 static int
bip_buffer_write(BipBuffer bip,const void * src,int len)916 bip_buffer_write( BipBuffer bip, const void* src, int len )
917 {
918 int avail, count = 0;
919
920 if (len <= 0)
921 return 0;
922
923 BIPD(( "bip_buffer_write: enter %d->%d len %d\n", bip->fdin, bip->fdout, len ));
924 BIPDUMP( src, len );
925
926 EnterCriticalSection( &bip->lock );
927
928 while (!bip->can_write) {
929 int ret;
930 LeaveCriticalSection( &bip->lock );
931
932 if (bip->closed) {
933 errno = EPIPE;
934 return -1;
935 }
936 /* spinlocking here is probably unfair, but let's live with it */
937 ret = WaitForSingleObject( bip->evt_write, INFINITE );
938 if (ret != WAIT_OBJECT_0) { /* buffer probably closed */
939 D( "bip_buffer_write: error %d->%d WaitForSingleObject returned %d, error %ld\n", bip->fdin, bip->fdout, ret, GetLastError() );
940 return 0;
941 }
942 if (bip->closed) {
943 errno = EPIPE;
944 return -1;
945 }
946 EnterCriticalSection( &bip->lock );
947 }
948
949 BIPD(( "bip_buffer_write: exec %d->%d len %d\n", bip->fdin, bip->fdout, len ));
950
951 avail = BIP_BUFFER_SIZE - bip->a_end;
952 if (avail > 0)
953 {
954 /* we can append to region A */
955 if (avail > len)
956 avail = len;
957
958 memcpy( bip->buff + bip->a_end, src, avail );
959 src += avail;
960 count += avail;
961 len -= avail;
962
963 bip->a_end += avail;
964 if (bip->a_end == BIP_BUFFER_SIZE && bip->a_start == 0) {
965 bip->can_write = 0;
966 ResetEvent( bip->evt_write );
967 goto Exit;
968 }
969 }
970
971 if (len == 0)
972 goto Exit;
973
974 avail = bip->a_start - bip->b_end;
975 assert( avail > 0 ); /* since can_write is TRUE */
976
977 if (avail > len)
978 avail = len;
979
980 memcpy( bip->buff + bip->b_end, src, avail );
981 count += avail;
982 bip->b_end += avail;
983
984 if (bip->b_end == bip->a_start) {
985 bip->can_write = 0;
986 ResetEvent( bip->evt_write );
987 }
988
989 Exit:
990 assert( count > 0 );
991
992 if ( !bip->can_read ) {
993 bip->can_read = 1;
994 SetEvent( bip->evt_read );
995 }
996
997 BIPD(( "bip_buffer_write: exit %d->%d count %d (as=%d ae=%d be=%d cw=%d cr=%d\n",
998 bip->fdin, bip->fdout, count, bip->a_start, bip->a_end, bip->b_end, bip->can_write, bip->can_read ));
999 LeaveCriticalSection( &bip->lock );
1000
1001 return count;
1002 }
1003
1004 static int
bip_buffer_read(BipBuffer bip,void * dst,int len)1005 bip_buffer_read( BipBuffer bip, void* dst, int len )
1006 {
1007 int avail, count = 0;
1008
1009 if (len <= 0)
1010 return 0;
1011
1012 BIPD(( "bip_buffer_read: enter %d->%d len %d\n", bip->fdin, bip->fdout, len ));
1013
1014 EnterCriticalSection( &bip->lock );
1015 while ( !bip->can_read )
1016 {
1017 #if 0
1018 LeaveCriticalSection( &bip->lock );
1019 errno = EAGAIN;
1020 return -1;
1021 #else
1022 int ret;
1023 LeaveCriticalSection( &bip->lock );
1024
1025 if (bip->closed) {
1026 errno = EPIPE;
1027 return -1;
1028 }
1029
1030 ret = WaitForSingleObject( bip->evt_read, INFINITE );
1031 if (ret != WAIT_OBJECT_0) { /* probably closed buffer */
1032 D( "bip_buffer_read: error %d->%d WaitForSingleObject returned %d, error %ld\n", bip->fdin, bip->fdout, ret, GetLastError());
1033 return 0;
1034 }
1035 if (bip->closed) {
1036 errno = EPIPE;
1037 return -1;
1038 }
1039 EnterCriticalSection( &bip->lock );
1040 #endif
1041 }
1042
1043 BIPD(( "bip_buffer_read: exec %d->%d len %d\n", bip->fdin, bip->fdout, len ));
1044
1045 avail = bip->a_end - bip->a_start;
1046 assert( avail > 0 ); /* since can_read is TRUE */
1047
1048 if (avail > len)
1049 avail = len;
1050
1051 memcpy( dst, bip->buff + bip->a_start, avail );
1052 dst += avail;
1053 count += avail;
1054 len -= avail;
1055
1056 bip->a_start += avail;
1057 if (bip->a_start < bip->a_end)
1058 goto Exit;
1059
1060 bip->a_start = 0;
1061 bip->a_end = bip->b_end;
1062 bip->b_end = 0;
1063
1064 avail = bip->a_end;
1065 if (avail > 0) {
1066 if (avail > len)
1067 avail = len;
1068 memcpy( dst, bip->buff, avail );
1069 count += avail;
1070 bip->a_start += avail;
1071
1072 if ( bip->a_start < bip->a_end )
1073 goto Exit;
1074
1075 bip->a_start = bip->a_end = 0;
1076 }
1077
1078 bip->can_read = 0;
1079 ResetEvent( bip->evt_read );
1080
1081 Exit:
1082 assert( count > 0 );
1083
1084 if (!bip->can_write ) {
1085 bip->can_write = 1;
1086 SetEvent( bip->evt_write );
1087 }
1088
1089 BIPDUMP( (const unsigned char*)dst - count, count );
1090 BIPD(( "bip_buffer_read: exit %d->%d count %d (as=%d ae=%d be=%d cw=%d cr=%d\n",
1091 bip->fdin, bip->fdout, count, bip->a_start, bip->a_end, bip->b_end, bip->can_write, bip->can_read ));
1092 LeaveCriticalSection( &bip->lock );
1093
1094 return count;
1095 }
1096
1097 typedef struct SocketPairRec_
1098 {
1099 BipBufferRec a2b_bip;
1100 BipBufferRec b2a_bip;
1101 FH a_fd;
1102 int used;
1103
1104 } SocketPairRec;
1105
_fh_socketpair_init(FH f)1106 void _fh_socketpair_init( FH f )
1107 {
1108 f->fh_pair = NULL;
1109 }
1110
1111 static int
_fh_socketpair_close(FH f)1112 _fh_socketpair_close( FH f )
1113 {
1114 if ( f->fh_pair ) {
1115 SocketPair pair = f->fh_pair;
1116
1117 if ( f == pair->a_fd ) {
1118 pair->a_fd = NULL;
1119 }
1120
1121 bip_buffer_close( &pair->b2a_bip );
1122 bip_buffer_close( &pair->a2b_bip );
1123
1124 if ( --pair->used == 0 ) {
1125 bip_buffer_done( &pair->b2a_bip );
1126 bip_buffer_done( &pair->a2b_bip );
1127 free( pair );
1128 }
1129 f->fh_pair = NULL;
1130 }
1131 return 0;
1132 }
1133
1134 static int
_fh_socketpair_lseek(FH f,int pos,int origin)1135 _fh_socketpair_lseek( FH f, int pos, int origin )
1136 {
1137 errno = ESPIPE;
1138 return -1;
1139 }
1140
1141 static int
_fh_socketpair_read(FH f,void * buf,int len)1142 _fh_socketpair_read( FH f, void* buf, int len )
1143 {
1144 SocketPair pair = f->fh_pair;
1145 BipBuffer bip;
1146
1147 if (!pair)
1148 return -1;
1149
1150 if ( f == pair->a_fd )
1151 bip = &pair->b2a_bip;
1152 else
1153 bip = &pair->a2b_bip;
1154
1155 return bip_buffer_read( bip, buf, len );
1156 }
1157
1158 static int
_fh_socketpair_write(FH f,const void * buf,int len)1159 _fh_socketpair_write( FH f, const void* buf, int len )
1160 {
1161 SocketPair pair = f->fh_pair;
1162 BipBuffer bip;
1163
1164 if (!pair)
1165 return -1;
1166
1167 if ( f == pair->a_fd )
1168 bip = &pair->a2b_bip;
1169 else
1170 bip = &pair->b2a_bip;
1171
1172 return bip_buffer_write( bip, buf, len );
1173 }
1174
1175
1176 static void _fh_socketpair_hook( FH f, int event, EventHook hook ); /* forward */
1177
1178 static const FHClassRec _fh_socketpair_class =
1179 {
1180 _fh_socketpair_init,
1181 _fh_socketpair_close,
1182 _fh_socketpair_lseek,
1183 _fh_socketpair_read,
1184 _fh_socketpair_write,
1185 _fh_socketpair_hook
1186 };
1187
1188
adb_socketpair(int sv[2])1189 int adb_socketpair( int sv[2] )
1190 {
1191 FH fa, fb;
1192 SocketPair pair;
1193
1194 fa = _fh_alloc( &_fh_socketpair_class );
1195 fb = _fh_alloc( &_fh_socketpair_class );
1196
1197 if (!fa || !fb)
1198 goto Fail;
1199
1200 pair = malloc( sizeof(*pair) );
1201 if (pair == NULL) {
1202 D("adb_socketpair: not enough memory to allocate pipes\n" );
1203 goto Fail;
1204 }
1205
1206 bip_buffer_init( &pair->a2b_bip );
1207 bip_buffer_init( &pair->b2a_bip );
1208
1209 fa->fh_pair = pair;
1210 fb->fh_pair = pair;
1211 pair->used = 2;
1212 pair->a_fd = fa;
1213
1214 sv[0] = _fh_to_int(fa);
1215 sv[1] = _fh_to_int(fb);
1216
1217 pair->a2b_bip.fdin = sv[0];
1218 pair->a2b_bip.fdout = sv[1];
1219 pair->b2a_bip.fdin = sv[1];
1220 pair->b2a_bip.fdout = sv[0];
1221
1222 snprintf( fa->name, sizeof(fa->name), "%d(pair:%d)", sv[0], sv[1] );
1223 snprintf( fb->name, sizeof(fb->name), "%d(pair:%d)", sv[1], sv[0] );
1224 D( "adb_socketpair: returns (%d, %d)\n", sv[0], sv[1] );
1225 return 0;
1226
1227 Fail:
1228 _fh_close(fb);
1229 _fh_close(fa);
1230 return -1;
1231 }
1232
1233 /**************************************************************************/
1234 /**************************************************************************/
1235 /***** *****/
1236 /***** fdevents emulation *****/
1237 /***** *****/
1238 /***** this is a very simple implementation, we rely on the fact *****/
1239 /***** that ADB doesn't use FDE_ERROR. *****/
1240 /***** *****/
1241 /**************************************************************************/
1242 /**************************************************************************/
1243
1244 #define FATAL(x...) fatal(__FUNCTION__, x)
1245
1246 #if DEBUG
dump_fde(fdevent * fde,const char * info)1247 static void dump_fde(fdevent *fde, const char *info)
1248 {
1249 fprintf(stderr,"FDE #%03d %c%c%c %s\n", fde->fd,
1250 fde->state & FDE_READ ? 'R' : ' ',
1251 fde->state & FDE_WRITE ? 'W' : ' ',
1252 fde->state & FDE_ERROR ? 'E' : ' ',
1253 info);
1254 }
1255 #else
1256 #define dump_fde(fde, info) do { } while(0)
1257 #endif
1258
1259 #define FDE_EVENTMASK 0x00ff
1260 #define FDE_STATEMASK 0xff00
1261
1262 #define FDE_ACTIVE 0x0100
1263 #define FDE_PENDING 0x0200
1264 #define FDE_CREATED 0x0400
1265
1266 static void fdevent_plist_enqueue(fdevent *node);
1267 static void fdevent_plist_remove(fdevent *node);
1268 static fdevent *fdevent_plist_dequeue(void);
1269
1270 static fdevent list_pending = {
1271 .next = &list_pending,
1272 .prev = &list_pending,
1273 };
1274
1275 static fdevent **fd_table = 0;
1276 static int fd_table_max = 0;
1277
1278 typedef struct EventLooperRec_* EventLooper;
1279
1280 typedef struct EventHookRec_
1281 {
1282 EventHook next;
1283 FH fh;
1284 HANDLE h;
1285 int wanted; /* wanted event flags */
1286 int ready; /* ready event flags */
1287 void* aux;
1288 void (*prepare)( EventHook hook );
1289 int (*start) ( EventHook hook );
1290 void (*stop) ( EventHook hook );
1291 int (*check) ( EventHook hook );
1292 int (*peek) ( EventHook hook );
1293 } EventHookRec;
1294
1295 static EventHook _free_hooks;
1296
1297 static EventHook
event_hook_alloc(FH fh)1298 event_hook_alloc( FH fh )
1299 {
1300 EventHook hook = _free_hooks;
1301 if (hook != NULL)
1302 _free_hooks = hook->next;
1303 else {
1304 hook = malloc( sizeof(*hook) );
1305 if (hook == NULL)
1306 fatal( "could not allocate event hook\n" );
1307 }
1308 hook->next = NULL;
1309 hook->fh = fh;
1310 hook->wanted = 0;
1311 hook->ready = 0;
1312 hook->h = INVALID_HANDLE_VALUE;
1313 hook->aux = NULL;
1314
1315 hook->prepare = NULL;
1316 hook->start = NULL;
1317 hook->stop = NULL;
1318 hook->check = NULL;
1319 hook->peek = NULL;
1320
1321 return hook;
1322 }
1323
1324 static void
event_hook_free(EventHook hook)1325 event_hook_free( EventHook hook )
1326 {
1327 hook->fh = NULL;
1328 hook->wanted = 0;
1329 hook->ready = 0;
1330 hook->next = _free_hooks;
1331 _free_hooks = hook;
1332 }
1333
1334
1335 static void
event_hook_signal(EventHook hook)1336 event_hook_signal( EventHook hook )
1337 {
1338 FH f = hook->fh;
1339 int fd = _fh_to_int(f);
1340 fdevent* fde = fd_table[ fd - WIN32_FH_BASE ];
1341
1342 if (fde != NULL && fde->fd == fd) {
1343 if ((fde->state & FDE_PENDING) == 0) {
1344 fde->state |= FDE_PENDING;
1345 fdevent_plist_enqueue( fde );
1346 }
1347 fde->events |= hook->wanted;
1348 }
1349 }
1350
1351
1352 #define MAX_LOOPER_HANDLES WIN32_MAX_FHS
1353
1354 typedef struct EventLooperRec_
1355 {
1356 EventHook hooks;
1357 HANDLE htab[ MAX_LOOPER_HANDLES ];
1358 int htab_count;
1359
1360 } EventLooperRec;
1361
1362 static EventHook*
event_looper_find_p(EventLooper looper,FH fh)1363 event_looper_find_p( EventLooper looper, FH fh )
1364 {
1365 EventHook *pnode = &looper->hooks;
1366 EventHook node = *pnode;
1367 for (;;) {
1368 if ( node == NULL || node->fh == fh )
1369 break;
1370 pnode = &node->next;
1371 node = *pnode;
1372 }
1373 return pnode;
1374 }
1375
1376 static void
event_looper_hook(EventLooper looper,int fd,int events)1377 event_looper_hook( EventLooper looper, int fd, int events )
1378 {
1379 FH f = _fh_from_int(fd);
1380 EventHook *pnode;
1381 EventHook node;
1382
1383 if (f == NULL) /* invalid arg */ {
1384 D("event_looper_hook: invalid fd=%d\n", fd);
1385 return;
1386 }
1387
1388 pnode = event_looper_find_p( looper, f );
1389 node = *pnode;
1390 if ( node == NULL ) {
1391 node = event_hook_alloc( f );
1392 node->next = *pnode;
1393 *pnode = node;
1394 }
1395
1396 if ( (node->wanted & events) != events ) {
1397 /* this should update start/stop/check/peek */
1398 D("event_looper_hook: call hook for %d (new=%x, old=%x)\n",
1399 fd, node->wanted, events);
1400 f->clazz->_fh_hook( f, events & ~node->wanted, node );
1401 node->wanted |= events;
1402 } else {
1403 D("event_looper_hook: ignoring events %x for %d wanted=%x)\n",
1404 events, fd, node->wanted);
1405 }
1406 }
1407
1408 static void
event_looper_unhook(EventLooper looper,int fd,int events)1409 event_looper_unhook( EventLooper looper, int fd, int events )
1410 {
1411 FH fh = _fh_from_int(fd);
1412 EventHook *pnode = event_looper_find_p( looper, fh );
1413 EventHook node = *pnode;
1414
1415 if (node != NULL) {
1416 int events2 = events & node->wanted;
1417 if ( events2 == 0 ) {
1418 D( "event_looper_unhook: events %x not registered for fd %d\n", events, fd );
1419 return;
1420 }
1421 node->wanted &= ~events2;
1422 if (!node->wanted) {
1423 *pnode = node->next;
1424 event_hook_free( node );
1425 }
1426 }
1427 }
1428
1429 static EventLooperRec win32_looper;
1430
fdevent_init(void)1431 static void fdevent_init(void)
1432 {
1433 win32_looper.htab_count = 0;
1434 win32_looper.hooks = NULL;
1435 }
1436
fdevent_connect(fdevent * fde)1437 static void fdevent_connect(fdevent *fde)
1438 {
1439 EventLooper looper = &win32_looper;
1440 int events = fde->state & FDE_EVENTMASK;
1441
1442 if (events != 0)
1443 event_looper_hook( looper, fde->fd, events );
1444 }
1445
fdevent_disconnect(fdevent * fde)1446 static void fdevent_disconnect(fdevent *fde)
1447 {
1448 EventLooper looper = &win32_looper;
1449 int events = fde->state & FDE_EVENTMASK;
1450
1451 if (events != 0)
1452 event_looper_unhook( looper, fde->fd, events );
1453 }
1454
fdevent_update(fdevent * fde,unsigned events)1455 static void fdevent_update(fdevent *fde, unsigned events)
1456 {
1457 EventLooper looper = &win32_looper;
1458 unsigned events0 = fde->state & FDE_EVENTMASK;
1459
1460 if (events != events0) {
1461 int removes = events0 & ~events;
1462 int adds = events & ~events0;
1463 if (removes) {
1464 D("fdevent_update: remove %x from %d\n", removes, fde->fd);
1465 event_looper_unhook( looper, fde->fd, removes );
1466 }
1467 if (adds) {
1468 D("fdevent_update: add %x to %d\n", adds, fde->fd);
1469 event_looper_hook ( looper, fde->fd, adds );
1470 }
1471 }
1472 }
1473
fdevent_process()1474 static void fdevent_process()
1475 {
1476 EventLooper looper = &win32_looper;
1477 EventHook hook;
1478 int gotone = 0;
1479
1480 /* if we have at least one ready hook, execute it/them */
1481 for (hook = looper->hooks; hook; hook = hook->next) {
1482 hook->ready = 0;
1483 if (hook->prepare) {
1484 hook->prepare(hook);
1485 if (hook->ready != 0) {
1486 event_hook_signal( hook );
1487 gotone = 1;
1488 }
1489 }
1490 }
1491
1492 /* nothing's ready yet, so wait for something to happen */
1493 if (!gotone)
1494 {
1495 looper->htab_count = 0;
1496
1497 for (hook = looper->hooks; hook; hook = hook->next)
1498 {
1499 if (hook->start && !hook->start(hook)) {
1500 D( "fdevent_process: error when starting a hook\n" );
1501 return;
1502 }
1503 if (hook->h != INVALID_HANDLE_VALUE) {
1504 int nn;
1505
1506 for (nn = 0; nn < looper->htab_count; nn++)
1507 {
1508 if ( looper->htab[nn] == hook->h )
1509 goto DontAdd;
1510 }
1511 looper->htab[ looper->htab_count++ ] = hook->h;
1512 DontAdd:
1513 ;
1514 }
1515 }
1516
1517 if (looper->htab_count == 0) {
1518 D( "fdevent_process: nothing to wait for !!\n" );
1519 return;
1520 }
1521
1522 do
1523 {
1524 int wait_ret;
1525
1526 D( "adb_win32: waiting for %d events\n", looper->htab_count );
1527 if (looper->htab_count > MAXIMUM_WAIT_OBJECTS) {
1528 D("handle count %d exceeds MAXIMUM_WAIT_OBJECTS, aborting!\n", looper->htab_count);
1529 abort();
1530 }
1531 wait_ret = WaitForMultipleObjects( looper->htab_count, looper->htab, FALSE, INFINITE );
1532 if (wait_ret == (int)WAIT_FAILED) {
1533 D( "adb_win32: wait failed, error %ld\n", GetLastError() );
1534 } else {
1535 D( "adb_win32: got one (index %d)\n", wait_ret );
1536
1537 /* according to Cygwin, some objects like consoles wake up on "inappropriate" events
1538 * like mouse movements. we need to filter these with the "check" function
1539 */
1540 if ((unsigned)wait_ret < (unsigned)looper->htab_count)
1541 {
1542 for (hook = looper->hooks; hook; hook = hook->next)
1543 {
1544 if ( looper->htab[wait_ret] == hook->h &&
1545 (!hook->check || hook->check(hook)) )
1546 {
1547 D( "adb_win32: signaling %s for %x\n", hook->fh->name, hook->ready );
1548 event_hook_signal( hook );
1549 gotone = 1;
1550 break;
1551 }
1552 }
1553 }
1554 }
1555 }
1556 while (!gotone);
1557
1558 for (hook = looper->hooks; hook; hook = hook->next) {
1559 if (hook->stop)
1560 hook->stop( hook );
1561 }
1562 }
1563
1564 for (hook = looper->hooks; hook; hook = hook->next) {
1565 if (hook->peek && hook->peek(hook))
1566 event_hook_signal( hook );
1567 }
1568 }
1569
1570
fdevent_register(fdevent * fde)1571 static void fdevent_register(fdevent *fde)
1572 {
1573 int fd = fde->fd - WIN32_FH_BASE;
1574
1575 if(fd < 0) {
1576 FATAL("bogus negative fd (%d)\n", fde->fd);
1577 }
1578
1579 if(fd >= fd_table_max) {
1580 int oldmax = fd_table_max;
1581 if(fde->fd > 32000) {
1582 FATAL("bogus huuuuge fd (%d)\n", fde->fd);
1583 }
1584 if(fd_table_max == 0) {
1585 fdevent_init();
1586 fd_table_max = 256;
1587 }
1588 while(fd_table_max <= fd) {
1589 fd_table_max *= 2;
1590 }
1591 fd_table = realloc(fd_table, sizeof(fdevent*) * fd_table_max);
1592 if(fd_table == 0) {
1593 FATAL("could not expand fd_table to %d entries\n", fd_table_max);
1594 }
1595 memset(fd_table + oldmax, 0, sizeof(int) * (fd_table_max - oldmax));
1596 }
1597
1598 fd_table[fd] = fde;
1599 }
1600
fdevent_unregister(fdevent * fde)1601 static void fdevent_unregister(fdevent *fde)
1602 {
1603 int fd = fde->fd - WIN32_FH_BASE;
1604
1605 if((fd < 0) || (fd >= fd_table_max)) {
1606 FATAL("fd out of range (%d)\n", fde->fd);
1607 }
1608
1609 if(fd_table[fd] != fde) {
1610 FATAL("fd_table out of sync");
1611 }
1612
1613 fd_table[fd] = 0;
1614
1615 if(!(fde->state & FDE_DONT_CLOSE)) {
1616 dump_fde(fde, "close");
1617 adb_close(fde->fd);
1618 }
1619 }
1620
fdevent_plist_enqueue(fdevent * node)1621 static void fdevent_plist_enqueue(fdevent *node)
1622 {
1623 fdevent *list = &list_pending;
1624
1625 node->next = list;
1626 node->prev = list->prev;
1627 node->prev->next = node;
1628 list->prev = node;
1629 }
1630
fdevent_plist_remove(fdevent * node)1631 static void fdevent_plist_remove(fdevent *node)
1632 {
1633 node->prev->next = node->next;
1634 node->next->prev = node->prev;
1635 node->next = 0;
1636 node->prev = 0;
1637 }
1638
fdevent_plist_dequeue(void)1639 static fdevent *fdevent_plist_dequeue(void)
1640 {
1641 fdevent *list = &list_pending;
1642 fdevent *node = list->next;
1643
1644 if(node == list) return 0;
1645
1646 list->next = node->next;
1647 list->next->prev = list;
1648 node->next = 0;
1649 node->prev = 0;
1650
1651 return node;
1652 }
1653
fdevent_create(int fd,fd_func func,void * arg)1654 fdevent *fdevent_create(int fd, fd_func func, void *arg)
1655 {
1656 fdevent *fde = (fdevent*) malloc(sizeof(fdevent));
1657 if(fde == 0) return 0;
1658 fdevent_install(fde, fd, func, arg);
1659 fde->state |= FDE_CREATED;
1660 return fde;
1661 }
1662
fdevent_destroy(fdevent * fde)1663 void fdevent_destroy(fdevent *fde)
1664 {
1665 if(fde == 0) return;
1666 if(!(fde->state & FDE_CREATED)) {
1667 FATAL("fde %p not created by fdevent_create()\n", fde);
1668 }
1669 fdevent_remove(fde);
1670 }
1671
fdevent_install(fdevent * fde,int fd,fd_func func,void * arg)1672 void fdevent_install(fdevent *fde, int fd, fd_func func, void *arg)
1673 {
1674 memset(fde, 0, sizeof(fdevent));
1675 fde->state = FDE_ACTIVE;
1676 fde->fd = fd;
1677 fde->func = func;
1678 fde->arg = arg;
1679
1680 fdevent_register(fde);
1681 dump_fde(fde, "connect");
1682 fdevent_connect(fde);
1683 fde->state |= FDE_ACTIVE;
1684 }
1685
fdevent_remove(fdevent * fde)1686 void fdevent_remove(fdevent *fde)
1687 {
1688 if(fde->state & FDE_PENDING) {
1689 fdevent_plist_remove(fde);
1690 }
1691
1692 if(fde->state & FDE_ACTIVE) {
1693 fdevent_disconnect(fde);
1694 dump_fde(fde, "disconnect");
1695 fdevent_unregister(fde);
1696 }
1697
1698 fde->state = 0;
1699 fde->events = 0;
1700 }
1701
1702
fdevent_set(fdevent * fde,unsigned events)1703 void fdevent_set(fdevent *fde, unsigned events)
1704 {
1705 events &= FDE_EVENTMASK;
1706
1707 if((fde->state & FDE_EVENTMASK) == (int)events) return;
1708
1709 if(fde->state & FDE_ACTIVE) {
1710 fdevent_update(fde, events);
1711 dump_fde(fde, "update");
1712 }
1713
1714 fde->state = (fde->state & FDE_STATEMASK) | events;
1715
1716 if(fde->state & FDE_PENDING) {
1717 /* if we're pending, make sure
1718 ** we don't signal an event that
1719 ** is no longer wanted.
1720 */
1721 fde->events &= (~events);
1722 if(fde->events == 0) {
1723 fdevent_plist_remove(fde);
1724 fde->state &= (~FDE_PENDING);
1725 }
1726 }
1727 }
1728
fdevent_add(fdevent * fde,unsigned events)1729 void fdevent_add(fdevent *fde, unsigned events)
1730 {
1731 fdevent_set(
1732 fde, (fde->state & FDE_EVENTMASK) | (events & FDE_EVENTMASK));
1733 }
1734
fdevent_del(fdevent * fde,unsigned events)1735 void fdevent_del(fdevent *fde, unsigned events)
1736 {
1737 fdevent_set(
1738 fde, (fde->state & FDE_EVENTMASK) & (~(events & FDE_EVENTMASK)));
1739 }
1740
fdevent_loop()1741 void fdevent_loop()
1742 {
1743 fdevent *fde;
1744
1745 for(;;) {
1746 #if DEBUG
1747 fprintf(stderr,"--- ---- waiting for events\n");
1748 #endif
1749 fdevent_process();
1750
1751 while((fde = fdevent_plist_dequeue())) {
1752 unsigned events = fde->events;
1753 fde->events = 0;
1754 fde->state &= (~FDE_PENDING);
1755 dump_fde(fde, "callback");
1756 fde->func(fde->fd, events, fde->arg);
1757 }
1758 }
1759 }
1760
1761 /** FILE EVENT HOOKS
1762 **/
1763
_event_file_prepare(EventHook hook)1764 static void _event_file_prepare( EventHook hook )
1765 {
1766 if (hook->wanted & (FDE_READ|FDE_WRITE)) {
1767 /* we can always read/write */
1768 hook->ready |= hook->wanted & (FDE_READ|FDE_WRITE);
1769 }
1770 }
1771
_event_file_peek(EventHook hook)1772 static int _event_file_peek( EventHook hook )
1773 {
1774 return (hook->wanted & (FDE_READ|FDE_WRITE));
1775 }
1776
_fh_file_hook(FH f,int events,EventHook hook)1777 static void _fh_file_hook( FH f, int events, EventHook hook )
1778 {
1779 hook->h = f->fh_handle;
1780 hook->prepare = _event_file_prepare;
1781 hook->peek = _event_file_peek;
1782 }
1783
1784 /** SOCKET EVENT HOOKS
1785 **/
1786
_event_socket_verify(EventHook hook,WSANETWORKEVENTS * evts)1787 static void _event_socket_verify( EventHook hook, WSANETWORKEVENTS* evts )
1788 {
1789 if ( evts->lNetworkEvents & (FD_READ|FD_ACCEPT|FD_CLOSE) ) {
1790 if (hook->wanted & FDE_READ)
1791 hook->ready |= FDE_READ;
1792 if ((evts->iErrorCode[FD_READ] != 0) && hook->wanted & FDE_ERROR)
1793 hook->ready |= FDE_ERROR;
1794 }
1795 if ( evts->lNetworkEvents & (FD_WRITE|FD_CONNECT|FD_CLOSE) ) {
1796 if (hook->wanted & FDE_WRITE)
1797 hook->ready |= FDE_WRITE;
1798 if ((evts->iErrorCode[FD_WRITE] != 0) && hook->wanted & FDE_ERROR)
1799 hook->ready |= FDE_ERROR;
1800 }
1801 if ( evts->lNetworkEvents & FD_OOB ) {
1802 if (hook->wanted & FDE_ERROR)
1803 hook->ready |= FDE_ERROR;
1804 }
1805 }
1806
_event_socket_prepare(EventHook hook)1807 static void _event_socket_prepare( EventHook hook )
1808 {
1809 WSANETWORKEVENTS evts;
1810
1811 /* look if some of the events we want already happened ? */
1812 if (!WSAEnumNetworkEvents( hook->fh->fh_socket, NULL, &evts ))
1813 _event_socket_verify( hook, &evts );
1814 }
1815
_socket_wanted_to_flags(int wanted)1816 static int _socket_wanted_to_flags( int wanted )
1817 {
1818 int flags = 0;
1819 if (wanted & FDE_READ)
1820 flags |= FD_READ | FD_ACCEPT | FD_CLOSE;
1821
1822 if (wanted & FDE_WRITE)
1823 flags |= FD_WRITE | FD_CONNECT | FD_CLOSE;
1824
1825 if (wanted & FDE_ERROR)
1826 flags |= FD_OOB;
1827
1828 return flags;
1829 }
1830
_event_socket_start(EventHook hook)1831 static int _event_socket_start( EventHook hook )
1832 {
1833 /* create an event which we're going to wait for */
1834 FH fh = hook->fh;
1835 long flags = _socket_wanted_to_flags( hook->wanted );
1836
1837 hook->h = fh->event;
1838 if (hook->h == INVALID_HANDLE_VALUE) {
1839 D( "_event_socket_start: no event for %s\n", fh->name );
1840 return 0;
1841 }
1842
1843 if ( flags != fh->mask ) {
1844 D( "_event_socket_start: hooking %s for %x (flags %ld)\n", hook->fh->name, hook->wanted, flags );
1845 if ( WSAEventSelect( fh->fh_socket, hook->h, flags ) ) {
1846 D( "_event_socket_start: WSAEventSelect() for %s failed, error %d\n", hook->fh->name, WSAGetLastError() );
1847 CloseHandle( hook->h );
1848 hook->h = INVALID_HANDLE_VALUE;
1849 exit(1);
1850 return 0;
1851 }
1852 fh->mask = flags;
1853 }
1854 return 1;
1855 }
1856
_event_socket_stop(EventHook hook)1857 static void _event_socket_stop( EventHook hook )
1858 {
1859 hook->h = INVALID_HANDLE_VALUE;
1860 }
1861
_event_socket_check(EventHook hook)1862 static int _event_socket_check( EventHook hook )
1863 {
1864 int result = 0;
1865 FH fh = hook->fh;
1866 WSANETWORKEVENTS evts;
1867
1868 if (!WSAEnumNetworkEvents( fh->fh_socket, hook->h, &evts ) ) {
1869 _event_socket_verify( hook, &evts );
1870 result = (hook->ready != 0);
1871 if (result) {
1872 ResetEvent( hook->h );
1873 }
1874 }
1875 D( "_event_socket_check %s returns %d\n", fh->name, result );
1876 return result;
1877 }
1878
_event_socket_peek(EventHook hook)1879 static int _event_socket_peek( EventHook hook )
1880 {
1881 WSANETWORKEVENTS evts;
1882 FH fh = hook->fh;
1883
1884 /* look if some of the events we want already happened ? */
1885 if (!WSAEnumNetworkEvents( fh->fh_socket, NULL, &evts )) {
1886 _event_socket_verify( hook, &evts );
1887 if (hook->ready)
1888 ResetEvent( hook->h );
1889 }
1890
1891 return hook->ready != 0;
1892 }
1893
1894
1895
_fh_socket_hook(FH f,int events,EventHook hook)1896 static void _fh_socket_hook( FH f, int events, EventHook hook )
1897 {
1898 hook->prepare = _event_socket_prepare;
1899 hook->start = _event_socket_start;
1900 hook->stop = _event_socket_stop;
1901 hook->check = _event_socket_check;
1902 hook->peek = _event_socket_peek;
1903
1904 _event_socket_start( hook );
1905 }
1906
1907 /** SOCKETPAIR EVENT HOOKS
1908 **/
1909
_event_socketpair_prepare(EventHook hook)1910 static void _event_socketpair_prepare( EventHook hook )
1911 {
1912 FH fh = hook->fh;
1913 SocketPair pair = fh->fh_pair;
1914 BipBuffer rbip = (pair->a_fd == fh) ? &pair->b2a_bip : &pair->a2b_bip;
1915 BipBuffer wbip = (pair->a_fd == fh) ? &pair->a2b_bip : &pair->b2a_bip;
1916
1917 if (hook->wanted & FDE_READ && rbip->can_read)
1918 hook->ready |= FDE_READ;
1919
1920 if (hook->wanted & FDE_WRITE && wbip->can_write)
1921 hook->ready |= FDE_WRITE;
1922 }
1923
_event_socketpair_start(EventHook hook)1924 static int _event_socketpair_start( EventHook hook )
1925 {
1926 FH fh = hook->fh;
1927 SocketPair pair = fh->fh_pair;
1928 BipBuffer rbip = (pair->a_fd == fh) ? &pair->b2a_bip : &pair->a2b_bip;
1929 BipBuffer wbip = (pair->a_fd == fh) ? &pair->a2b_bip : &pair->b2a_bip;
1930
1931 if (hook->wanted == FDE_READ)
1932 hook->h = rbip->evt_read;
1933
1934 else if (hook->wanted == FDE_WRITE)
1935 hook->h = wbip->evt_write;
1936
1937 else {
1938 D("_event_socketpair_start: can't handle FDE_READ+FDE_WRITE\n" );
1939 return 0;
1940 }
1941 D( "_event_socketpair_start: hook %s for %x wanted=%x\n",
1942 hook->fh->name, _fh_to_int(fh), hook->wanted);
1943 return 1;
1944 }
1945
_event_socketpair_peek(EventHook hook)1946 static int _event_socketpair_peek( EventHook hook )
1947 {
1948 _event_socketpair_prepare( hook );
1949 return hook->ready != 0;
1950 }
1951
_fh_socketpair_hook(FH fh,int events,EventHook hook)1952 static void _fh_socketpair_hook( FH fh, int events, EventHook hook )
1953 {
1954 hook->prepare = _event_socketpair_prepare;
1955 hook->start = _event_socketpair_start;
1956 hook->peek = _event_socketpair_peek;
1957 }
1958
1959
1960 void
adb_sysdeps_init(void)1961 adb_sysdeps_init( void )
1962 {
1963 #define ADB_MUTEX(x) InitializeCriticalSection( & x );
1964 #include "mutex_list.h"
1965 InitializeCriticalSection( &_win32_lock );
1966 }
1967
1968