summaryrefslogtreecommitdiff
path: root/win32/win32sck.c
blob: 3f97241536c5ac3f5d90836e7d408fd587c26072 (plain)
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
/* win32sck.c
 *
 * (c) 1995 Microsoft Corporation. All rights reserved. 
 * 		Developed by hip communications inc.
 * Portions (c) 1993 Intergraph Corporation. All rights reserved.
 *
 *    You may distribute under the terms of either the GNU General Public
 *    License or the Artistic License, as specified in the README file.
 */

#define WIN32IO_IS_STDIO
#define WIN32SCK_IS_STDSCK
#define WIN32_LEAN_AND_MEAN
#define PERLIO_NOT_STDIO 0
#ifdef __GNUC__
#define Win32_Winsock
#endif
#include <windows.h>
#include <ws2spi.h>

#include "EXTERN.h"
#include "perl.h"

#include "Win32iop.h"
#include <sys/socket.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <assert.h>
#include <io.h>

/* thanks to Beverly Brown	(beverly@datacube.com) */
#define OPEN_SOCKET(x)	win32_open_osfhandle(x,O_RDWR|O_BINARY)
#define TO_SOCKET(x)	_get_osfhandle(x)

#define StartSockets() \
    STMT_START {					\
	if (!wsock_started)				\
	    start_sockets();				\
    } STMT_END

#define SOCKET_TEST(x, y) \
    STMT_START {					\
	StartSockets();					\
	if((x) == (y))					\
	    errno = get_last_socket_error();		\
    } STMT_END

#define SOCKET_TEST_ERROR(x) SOCKET_TEST(x, SOCKET_ERROR)

static int get_last_socket_error(void);
static struct servent* win32_savecopyservent(struct servent*d,
                                             struct servent*s,
                                             const char *proto);

static int wsock_started = 0;

#ifdef WIN32_DYN_IOINFO_SIZE
EXTERN_C Size_t w32_ioinfo_size;
#endif

EXTERN_C void
EndSockets(void)
{
    if (wsock_started)
	WSACleanup();
}

/* Translate WSAExxx values to corresponding Exxx values where possible. Not all
 * WSAExxx constants have corresponding Exxx constants in <errno.h> (even in
 * VC++ 2010 and above, which have expanded <errno.h> with more values), but
 * most missing constants are provided by win32/include/sys/errno2.h. The few
 * that are not are returned unchanged.
 *
 * The list of possible WSAExxx values used here comes from the MSDN page
 * titled "Windows Sockets Error Codes".
 *
 * (Note: Only the WSAExxx values are handled here; other WSAxxx values are
 * returned unchanged. The return value normally ends up in errno/$! and at
 * the Perl code level may be tested against the Exxx constants exported by
 * the Errno and POSIX modules, which have never handled the other WSAxxx
 * values themselves, apparently without any ill effect so far.)
 */
int
convert_wsa_error_to_errno(int wsaerr)
{
    switch (wsaerr) {
    case WSAEINTR:
	return EINTR;
    case WSAEBADF:
	return EBADF;
    case WSAEACCES:
	return EACCES;
    case WSAEFAULT:
	return EFAULT;
    case WSAEINVAL:
	return EINVAL;
    case WSAEMFILE:
	return EMFILE;
    case WSAEWOULDBLOCK:
	return EWOULDBLOCK;
    case WSAEINPROGRESS:
	return EINPROGRESS;
    case WSAEALREADY:
	return EALREADY;
    case WSAENOTSOCK:
	return ENOTSOCK;
    case WSAEDESTADDRREQ:
	return EDESTADDRREQ;
    case WSAEMSGSIZE:
	return EMSGSIZE;
    case WSAEPROTOTYPE:
	return EPROTOTYPE;
    case WSAENOPROTOOPT:
	return ENOPROTOOPT;
    case WSAEPROTONOSUPPORT:
	return EPROTONOSUPPORT;
    case WSAESOCKTNOSUPPORT:
	return ESOCKTNOSUPPORT;
    case WSAEOPNOTSUPP:
	return EOPNOTSUPP;
    case WSAEPFNOSUPPORT:
	return EPFNOSUPPORT;
    case WSAEAFNOSUPPORT:
	return EAFNOSUPPORT;
    case WSAEADDRINUSE:
	return EADDRINUSE;
    case WSAEADDRNOTAVAIL:
	return EADDRNOTAVAIL;
    case WSAENETDOWN:
	return ENETDOWN;
    case WSAENETUNREACH:
	return ENETUNREACH;
    case WSAENETRESET:
	return ENETRESET;
    case WSAECONNABORTED:
	return ECONNABORTED;
    case WSAECONNRESET:
	return ECONNRESET;
    case WSAENOBUFS:
	return ENOBUFS;
    case WSAEISCONN:
	return EISCONN;
    case WSAENOTCONN:
	return ENOTCONN;
    case WSAESHUTDOWN:
	return ESHUTDOWN;
    case WSAETOOMANYREFS:
	return ETOOMANYREFS;
    case WSAETIMEDOUT:
	return ETIMEDOUT;
    case WSAECONNREFUSED:
	return ECONNREFUSED;
    case WSAELOOP:
	return ELOOP;
    case WSAENAMETOOLONG:
	return ENAMETOOLONG;
    case WSAEHOSTDOWN:
	return WSAEHOSTDOWN;		/* EHOSTDOWN is not defined */
    case WSAEHOSTUNREACH:
	return EHOSTUNREACH;
    case WSAENOTEMPTY:
	return ENOTEMPTY;
    case WSAEPROCLIM:
	return EPROCLIM;
    case WSAEUSERS:
	return EUSERS;
    case WSAEDQUOT:
	return EDQUOT;
    case WSAESTALE:
	return ESTALE;
    case WSAEREMOTE:
	return EREMOTE;
    case WSAEDISCON:
	return WSAEDISCON;		/* EDISCON is not defined */
    case WSAENOMORE:
	return WSAENOMORE;		/* ENOMORE is not defined */
#ifdef WSAECANCELLED
    case WSAECANCELLED:			/* New in WinSock2 */
	return ECANCELED;
#endif
    case WSAEINVALIDPROCTABLE:
	return WSAEINVALIDPROCTABLE;	/* EINVALIDPROCTABLE is not defined */
    case WSAEINVALIDPROVIDER:
	return WSAEINVALIDPROVIDER;	/* EINVALIDPROVIDER is not defined */
    case WSAEPROVIDERFAILEDINIT:
	return WSAEPROVIDERFAILEDINIT;	/* EPROVIDERFAILEDINIT is not defined */
    case WSAEREFUSED:
	return WSAEREFUSED;		/* EREFUSED is not defined */
    }

    return wsaerr;
}

#ifdef ERRNO_HAS_POSIX_SUPPLEMENT
/* Translate Exxx values in the POSIX supplement range defined in VC++ 2010 and
 * above (EADDRINUSE <= err <= EWOULDBLOCK) to corresponding WSAExxx values. Not
 * all such Exxx constants have corresponding WSAExxx constants in <winsock*.h>;
 * we just use ERROR_INVALID_FUNCTION for those that are missing but do not
 * really expect to encounter them anyway in the context in which this function
 * is called.
 * Some versions of MinGW/gcc-4.8 and above also define most, but not all, of
 * these extra Exxx values. The missing ones are all cases for which there is no
 * corresponding WSAExxx constant anyway, so we simply omit the cases for them
 * here.
 * Other Exxx values (err < sys_nerr) are returned unchanged.
 */
int
convert_errno_to_wsa_error(int err)
{
    switch (err) {
    case EADDRINUSE:
	return WSAEADDRINUSE;
    case EADDRNOTAVAIL:
	return WSAEADDRNOTAVAIL;
    case EAFNOSUPPORT:
	return WSAEAFNOSUPPORT;
    case EALREADY:
	return WSAEALREADY;
#ifdef EBADMSG
    case EBADMSG:			/* Not defined in gcc-4.8.0 */
	return ERROR_INVALID_FUNCTION;
#endif
    case ECANCELED:
#ifdef WSAECANCELLED
	return WSAECANCELLED;		/* New in WinSock2 */
#else
	return ERROR_INVALID_FUNCTION;
#endif
    case ECONNABORTED:
	return WSAECONNABORTED;
    case ECONNREFUSED:
	return WSAECONNREFUSED;
    case ECONNRESET:
	return WSAECONNRESET;
    case EDESTADDRREQ:
	return WSAEDESTADDRREQ;
    case EHOSTUNREACH:
	return WSAEHOSTUNREACH;
#ifdef EIDRM
    case EIDRM:				/* Not defined in gcc-4.8.0 */
	return ERROR_INVALID_FUNCTION;
#endif
    case EINPROGRESS:
	return WSAEINPROGRESS;
    case EISCONN:
	return WSAEISCONN;
    case ELOOP:
	return WSAELOOP;
    case EMSGSIZE:
	return WSAEMSGSIZE;
    case ENETDOWN:
	return WSAENETDOWN;
    case ENETRESET:
	return WSAENETRESET;
    case ENETUNREACH:
	return WSAENETUNREACH;
    case ENOBUFS:
	return WSAENOBUFS;
#ifdef ENODATA
    case ENODATA:			/* Not defined in gcc-4.8.0 */
	return ERROR_INVALID_FUNCTION;
#endif
#ifdef ENOLINK
    case ENOLINK:			/* Not defined in gcc-4.8.0 */
	return ERROR_INVALID_FUNCTION;
#endif
#ifdef ENOMSG
    case ENOMSG:			/* Not defined in gcc-4.8.0 */
	return ERROR_INVALID_FUNCTION;
#endif
    case ENOPROTOOPT:
	return WSAENOPROTOOPT;
#ifdef ENOSR
    case ENOSR:				/* Not defined in gcc-4.8.0 */
	return ERROR_INVALID_FUNCTION;
#endif
#ifdef ENOSTR
    case ENOSTR:			/* Not defined in gcc-4.8.0 */
	return ERROR_INVALID_FUNCTION;
#endif
    case ENOTCONN:
	return WSAENOTCONN;
#ifdef ENOTRECOVERABLE
    case ENOTRECOVERABLE:		/* Not defined in gcc-4.8.0 */
	return ERROR_INVALID_FUNCTION;
#endif
    case ENOTSOCK:
	return WSAENOTSOCK;
    case ENOTSUP:
	return ERROR_INVALID_FUNCTION;
    case EOPNOTSUPP:
	return WSAEOPNOTSUPP;
#ifdef EOTHER
    case EOTHER:			/* Not defined in gcc-4.8.0 */
	return ERROR_INVALID_FUNCTION;
#endif
    case EOVERFLOW:
	return ERROR_INVALID_FUNCTION;
    case EOWNERDEAD:
	return ERROR_INVALID_FUNCTION;
    case EPROTO:
	return ERROR_INVALID_FUNCTION;
    case EPROTONOSUPPORT:
	return WSAEPROTONOSUPPORT;
    case EPROTOTYPE:
	return WSAEPROTOTYPE;
#ifdef ETIME
    case ETIME:				/* Not defined in gcc-4.8.0 */
	return ERROR_INVALID_FUNCTION;
#endif
    case ETIMEDOUT:
	return WSAETIMEDOUT;
#ifdef ETXTBSY
    case ETXTBSY:			/* Not defined in gcc-4.8.0 */
	return ERROR_INVALID_FUNCTION;
#endif
    case EWOULDBLOCK:
	return WSAEWOULDBLOCK;
    }

    return err;
}
#endif /* ERRNO_HAS_POSIX_SUPPLEMENT */

static int
get_last_socket_error(void)
{
    return convert_wsa_error_to_errno(WSAGetLastError());
}

void
start_sockets(void) 
{
    unsigned short version;
    WSADATA retdata;
    int ret;

    /*
     * initalize the winsock interface and insure that it is
     * cleaned up at exit.
     */
    version = 0x2;
    if(ret = WSAStartup(version, &retdata))
	Perl_croak_nocontext("Unable to locate winsock library!\n");
    if(retdata.wVersion != version)
	Perl_croak_nocontext("Could not find version 2.0 of winsock dll\n");

    /* atexit((void (*)(void)) EndSockets); */
    wsock_started = 1;
}

/* in no sockets Win32 builds, these use the inline functions defined in
 * perl.h
 */
u_long
win32_htonl(u_long hostlong)
{
#ifndef WIN32_NO_SOCKETS
    StartSockets();
#endif
    return htonl(hostlong);
}

u_short
win32_htons(u_short hostshort)
{
#ifndef WIN32_NO_SOCKETS
    StartSockets();
#endif
    return htons(hostshort);
}

u_long
win32_ntohl(u_long netlong)
{
#ifndef WIN32_NO_SOCKETS
    StartSockets();
#endif
    return ntohl(netlong);
}

u_short
win32_ntohs(u_short netshort)
{
#ifndef WIN32_NO_SOCKETS
    StartSockets();
#endif
    return ntohs(netshort);
}



SOCKET
win32_accept(SOCKET s, struct sockaddr *addr, int *addrlen)
{
    SOCKET r;

    SOCKET_TEST((r = accept(TO_SOCKET(s), addr, addrlen)), INVALID_SOCKET);
    return OPEN_SOCKET(r);
}

int
win32_bind(SOCKET s, const struct sockaddr *addr, int addrlen)
{
    int r;

    SOCKET_TEST_ERROR(r = bind(TO_SOCKET(s), addr, addrlen));
    return r;
}

int
win32_connect(SOCKET s, const struct sockaddr *addr, int addrlen)
{
    int r;

    SOCKET_TEST_ERROR(r = connect(TO_SOCKET(s), addr, addrlen));
    return r;
}


int
win32_getpeername(SOCKET s, struct sockaddr *addr, int *addrlen)
{
    int r;

    SOCKET_TEST_ERROR(r = getpeername(TO_SOCKET(s), addr, addrlen));
    return r;
}

int
win32_getsockname(SOCKET s, struct sockaddr *addr, int *addrlen)
{
    int r;

    SOCKET_TEST_ERROR(r = getsockname(TO_SOCKET(s), addr, addrlen));
    return r;
}

int
win32_getsockopt(SOCKET s, int level, int optname, char *optval, int *optlen)
{
    int r;

    SOCKET_TEST_ERROR(r = getsockopt(TO_SOCKET(s), level, optname, optval, optlen));
    return r;
}

int
win32_ioctlsocket(SOCKET s, long cmd, u_long *argp)
{
    int r;

    SOCKET_TEST_ERROR(r = ioctlsocket(TO_SOCKET(s), cmd, argp));
    return r;
}

int
win32_listen(SOCKET s, int backlog)
{
    int r;

    SOCKET_TEST_ERROR(r = listen(TO_SOCKET(s), backlog));
    return r;
}

int
win32_recv(SOCKET s, char *buf, int len, int flags)
{
    int r;

    SOCKET_TEST_ERROR(r = recv(TO_SOCKET(s), buf, len, flags));
    return r;
}

int
win32_recvfrom(SOCKET s, char *buf, int len, int flags, struct sockaddr *from, int *fromlen)
{
    int r;
    int frombufsize = *fromlen;

    SOCKET_TEST_ERROR(r = recvfrom(TO_SOCKET(s), buf, len, flags, from, fromlen));
    /* Winsock's recvfrom() only returns a valid 'from' when the socket
     * is connectionless.  Perl expects a valid 'from' for all types
     * of sockets, so go the extra mile.
     */
    if (r != SOCKET_ERROR && frombufsize == *fromlen)
	(void)win32_getpeername(s, from, fromlen);
    return r;
}

/* select contributed by Vincent R. Slyngstad (vrs@ibeam.intel.com) */
int
win32_select(int nfds, Perl_fd_set* rd, Perl_fd_set* wr, Perl_fd_set* ex, const struct timeval* timeout)
{
    int r;
    int i, fd, save_errno = errno;
    FD_SET nrd, nwr, nex;
    bool just_sleep = TRUE;

    StartSockets();

    FD_ZERO(&nrd);
    FD_ZERO(&nwr);
    FD_ZERO(&nex);
    for (i = 0; i < nfds; i++) {
	if (rd && PERL_FD_ISSET(i,rd)) {
	    fd = TO_SOCKET(i);
	    FD_SET((unsigned)fd, &nrd);
            just_sleep = FALSE;
	}
	if (wr && PERL_FD_ISSET(i,wr)) {
	    fd = TO_SOCKET(i);
	    FD_SET((unsigned)fd, &nwr);
            just_sleep = FALSE;
	}
	if (ex && PERL_FD_ISSET(i,ex)) {
	    fd = TO_SOCKET(i);
	    FD_SET((unsigned)fd, &nex);
            just_sleep = FALSE;
	}
    }

    /* winsock seems incapable of dealing with all three fd_sets being empty,
     * so do the (millisecond) sleep as a special case
     */
    if (just_sleep) {
	if (timeout)
	    Sleep(timeout->tv_sec  * 1000 +
		  timeout->tv_usec / 1000);	/* do the best we can */
	else
	    Sleep(UINT_MAX);
	return 0;
    }

    errno = save_errno;
    SOCKET_TEST_ERROR(r = select(nfds, &nrd, &nwr, &nex, (PTIMEVAL)timeout));
    save_errno = errno;

    for (i = 0; i < nfds; i++) {
	if (rd && PERL_FD_ISSET(i,rd)) {
	    fd = TO_SOCKET(i);
	    if (!FD_ISSET(fd, &nrd))
		PERL_FD_CLR(i,rd);
	}
	if (wr && PERL_FD_ISSET(i,wr)) {
	    fd = TO_SOCKET(i);
	    if (!FD_ISSET(fd, &nwr))
		PERL_FD_CLR(i,wr);
	}
	if (ex && PERL_FD_ISSET(i,ex)) {
	    fd = TO_SOCKET(i);
	    if (!FD_ISSET(fd, &nex))
		PERL_FD_CLR(i,ex);
	}
    }
    errno = save_errno;
    return r;
}

int
win32_send(SOCKET s, const char *buf, int len, int flags)
{
    int r;

    SOCKET_TEST_ERROR(r = send(TO_SOCKET(s), buf, len, flags));
    return r;
}

int
win32_sendto(SOCKET s, const char *buf, int len, int flags,
	     const struct sockaddr *to, int tolen)
{
    int r;

    SOCKET_TEST_ERROR(r = sendto(TO_SOCKET(s), buf, len, flags, to, tolen));
    return r;
}

int
win32_setsockopt(SOCKET s, int level, int optname, const char *optval, int optlen)
{
    int r;

    SOCKET_TEST_ERROR(r = setsockopt(TO_SOCKET(s), level, optname, optval, optlen));
    return r;
}
    
int
win32_shutdown(SOCKET s, int how)
{
    int r;

    SOCKET_TEST_ERROR(r = shutdown(TO_SOCKET(s), how));
    return r;
}

int
win32_closesocket(SOCKET s)
{
    int r;

    SOCKET_TEST_ERROR(r = closesocket(TO_SOCKET(s)));
    return r;
}

void
convert_proto_info_w2a(WSAPROTOCOL_INFOW *in, WSAPROTOCOL_INFOA *out)
{
    Copy(in, out, 1, WSAPROTOCOL_INFOA);
    wcstombs(out->szProtocol, in->szProtocol, sizeof(out->szProtocol));
}

SOCKET
open_ifs_socket(int af, int type, int protocol)
{
    dTHX;
    char *s;
    unsigned long proto_buffers_len = 0;
    int error_code;
    SOCKET out = INVALID_SOCKET;

    if ((s = PerlEnv_getenv("PERL_ALLOW_NON_IFS_LSP")) && atoi(s))
        return WSASocket(af, type, protocol, NULL, 0, 0);

    if (WSCEnumProtocols(NULL, NULL, &proto_buffers_len, &error_code) == SOCKET_ERROR
        && error_code == WSAENOBUFS)
    {
	WSAPROTOCOL_INFOW *proto_buffers;
        int protocols_available = 0;       
 
        Newx(proto_buffers, proto_buffers_len / sizeof(WSAPROTOCOL_INFOW),
            WSAPROTOCOL_INFOW);

        if ((protocols_available = WSCEnumProtocols(NULL, proto_buffers, 
            &proto_buffers_len, &error_code)) != SOCKET_ERROR)
        {
            int i;
            for (i = 0; i < protocols_available; i++)
            {
                WSAPROTOCOL_INFOA proto_info;

                if ((af != AF_UNSPEC && af != proto_buffers[i].iAddressFamily)
                    || (type != proto_buffers[i].iSocketType)
                    || (protocol != 0 && proto_buffers[i].iProtocol != 0 &&
                        protocol != proto_buffers[i].iProtocol))
                    continue;

                if ((proto_buffers[i].dwServiceFlags1 & XP1_IFS_HANDLES) == 0)
                    continue;

                convert_proto_info_w2a(&(proto_buffers[i]), &proto_info);

                out = WSASocket(af, type, protocol, &proto_info, 0, 0);
                break;
            }
        }

        Safefree(proto_buffers);
    }

    return out;
}

SOCKET
win32_socket(int af, int type, int protocol)
{
    SOCKET s;

    StartSockets();

    if((s = open_ifs_socket(af, type, protocol)) == INVALID_SOCKET)
	errno = get_last_socket_error();
    else
	s = OPEN_SOCKET(s);

    return s;
}

/*
 * close RTL fd while respecting sockets
 * added as temporary measure until PerlIO has real
 * Win32 native layer
 *   -- BKS, 11-11-2000
*/

int my_close(int fd)
{
    int osf;
    if (!wsock_started)		/* No WinSock? */
	return(close(fd));	/* Then not a socket. */
    osf = TO_SOCKET(fd);/* Get it now before it's gone! */
    if (osf != -1) {
	int err;
	err = closesocket(osf);
	if (err == 0) {
	    assert(_osfhnd(fd) == osf); /* catch a bad ioinfo struct def */
	    /* don't close freed handle */
	    _set_osfhnd(fd, INVALID_HANDLE_VALUE);
	    return close(fd);
	}
	else if (err == SOCKET_ERROR) {
	    err = get_last_socket_error();
	    if (err != ENOTSOCK) {
		(void)close(fd);
		errno = err;
		return EOF;
	    }
	}
    }
    return close(fd);
}

#undef fclose
int
my_fclose (FILE *pf)
{
    int osf;
    if (!wsock_started)		/* No WinSock? */
	return(fclose(pf));	/* Then not a socket. */
    osf = TO_SOCKET(win32_fileno(pf));/* Get it now before it's gone! */
    if (osf != -1) {
	int err;
	win32_fflush(pf);
	err = closesocket(osf);
	if (err == 0) {
	    assert(_osfhnd(win32_fileno(pf)) == osf); /* catch a bad ioinfo struct def */
	    /* don't close freed handle */
	    _set_osfhnd(win32_fileno(pf), INVALID_HANDLE_VALUE);
	    return fclose(pf);
	}
	else if (err == SOCKET_ERROR) {
	    err = get_last_socket_error();
	    if (err != ENOTSOCK) {
		(void)fclose(pf);
		errno = err;
		return EOF;
	    }
	}
    }
    return fclose(pf);
}

struct hostent *
win32_gethostbyaddr(const char *addr, int len, int type)
{
    struct hostent *r;

    SOCKET_TEST(r = gethostbyaddr(addr, len, type), NULL);
    return r;
}

struct hostent *
win32_gethostbyname(const char *name)
{
    struct hostent *r;

    SOCKET_TEST(r = gethostbyname(name), NULL);
    return r;
}

int
win32_gethostname(char *name, int len)
{
    int r;

    SOCKET_TEST_ERROR(r = gethostname(name, len));
    return r;
}

struct protoent *
win32_getprotobyname(const char *name)
{
    struct protoent *r;

    SOCKET_TEST(r = getprotobyname(name), NULL);
    return r;
}

struct protoent *
win32_getprotobynumber(int num)
{
    struct protoent *r;

    SOCKET_TEST(r = getprotobynumber(num), NULL);
    return r;
}

struct servent *
win32_getservbyname(const char *name, const char *proto)
{
    dTHXa(NULL);    
    struct servent *r;

    SOCKET_TEST(r = getservbyname(name, proto), NULL);
    if (r) {
        aTHXa(PERL_GET_THX);
	r = win32_savecopyservent(&w32_servent, r, proto);
    }
    return r;
}

struct servent *
win32_getservbyport(int port, const char *proto)
{
    dTHXa(NULL); 
    struct servent *r;

    SOCKET_TEST(r = getservbyport(port, proto), NULL);
    if (r) {
        aTHXa(PERL_GET_THX);
	r = win32_savecopyservent(&w32_servent, r, proto);
    }
    return r;
}

int
win32_ioctl(int i, unsigned int u, char *data)
{
    u_long u_long_arg; 
    int retval;
    
    if (!wsock_started) {
	Perl_croak_nocontext("ioctl implemented only on sockets");
	/* NOTREACHED */
    }

    /* mauke says using memcpy avoids alignment issues */
    memcpy(&u_long_arg, data, sizeof u_long_arg); 
    retval = ioctlsocket(TO_SOCKET(i), (long)u, &u_long_arg);
    memcpy(data, &u_long_arg, sizeof u_long_arg);
    
    if (retval == SOCKET_ERROR) {
	int err = get_last_socket_error();
	if (err == ENOTSOCK) {
	    Perl_croak_nocontext("ioctl implemented only on sockets");
	    /* NOTREACHED */
	}
	errno = err;
    }
    return retval;
}

char FAR *
win32_inet_ntoa(struct in_addr in)
{
    StartSockets();
    return inet_ntoa(in);
}

unsigned long
win32_inet_addr(const char FAR *cp)
{
    StartSockets();
    return inet_addr(cp);
}

/*
 * Networking stubs
 */

void
win32_endhostent() 
{
    win32_croak_not_implemented("endhostent");
}

void
win32_endnetent()
{
    win32_croak_not_implemented("endnetent");
}

void
win32_endprotoent()
{
    win32_croak_not_implemented("endprotoent");
}

void
win32_endservent()
{
    win32_croak_not_implemented("endservent");
}


struct netent *
win32_getnetent(void) 
{
    win32_croak_not_implemented("getnetent");
    return (struct netent *) NULL;
}

struct netent *
win32_getnetbyname(char *name) 
{
    win32_croak_not_implemented("getnetbyname");
    return (struct netent *)NULL;
}

struct netent *
win32_getnetbyaddr(long net, int type) 
{
    win32_croak_not_implemented("getnetbyaddr");
    return (struct netent *)NULL;
}

struct protoent *
win32_getprotoent(void) 
{
    win32_croak_not_implemented("getprotoent");
    return (struct protoent *) NULL;
}

struct servent *
win32_getservent(void) 
{
    win32_croak_not_implemented("getservent");
    return (struct servent *) NULL;
}

void
win32_sethostent(int stayopen)
{
    win32_croak_not_implemented("sethostent");
}


void
win32_setnetent(int stayopen)
{
    win32_croak_not_implemented("setnetent");
}


void
win32_setprotoent(int stayopen)
{
    win32_croak_not_implemented("setprotoent");
}


void
win32_setservent(int stayopen)
{
    win32_croak_not_implemented("setservent");
}

static struct servent*
win32_savecopyservent(struct servent*d, struct servent*s, const char *proto)
{
    d->s_name = s->s_name;
    d->s_aliases = s->s_aliases;
    d->s_port = s->s_port;
    if (s->s_proto && strlen(s->s_proto))
	d->s_proto = s->s_proto;
    else
    if (proto && strlen(proto))
	d->s_proto = (char *)proto;
    else
	d->s_proto = "tcp";
   
    return d;
}