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
|
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2021 The OpenLDAP Foundation.
* Portions Copyright 1998 A. Hartgers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/* ACKNOWLEDGEMENTS:
* This work was initially developed by Bart Hartgers for inclusion in
* OpenLDAP Software.
*/
/*
* util-int.c Various functions to replace missing threadsafe ones.
* Without the real *_r funcs, things will
* work, but might not be threadsafe.
*/
#include "portable.h"
#include <ac/stdlib.h>
#include <ac/errno.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
#include <ac/unistd.h>
#include "ldap-int.h"
#ifndef h_errno
/* newer systems declare this in <netdb.h> for you, older ones don't.
* harmless to declare it again (unless defined by a macro).
*/
extern int h_errno;
#endif
#ifdef HAVE_HSTRERROR
# define HSTRERROR(e) hstrerror(e)
#else
# define HSTRERROR(e) hp_strerror(e)
#endif
#ifndef LDAP_R_COMPILE
# undef HAVE_REENTRANT_FUNCTIONS
# undef HAVE_CTIME_R
# undef HAVE_GETHOSTBYNAME_R
# undef HAVE_GETHOSTBYADDR_R
#else
# include <ldap_pvt_thread.h>
ldap_pvt_thread_mutex_t ldap_int_resolv_mutex;
ldap_pvt_thread_mutex_t ldap_int_hostname_mutex;
static ldap_pvt_thread_mutex_t ldap_int_gettime_mutex;
# if (defined( HAVE_CTIME_R ) || defined( HAVE_REENTRANT_FUNCTIONS)) \
&& defined( CTIME_R_NARGS )
# define USE_CTIME_R
# else
static ldap_pvt_thread_mutex_t ldap_int_ctime_mutex;
# endif
/* USE_GMTIME_R and USE_LOCALTIME_R defined in ldap_pvt.h */
#ifdef LDAP_DEVEL
/* to be released with 2.5 */
#if !defined( USE_GMTIME_R ) || !defined( USE_LOCALTIME_R )
/* we use the same mutex for gmtime(3) and localtime(3)
* because implementations may use the same buffer
* for both functions */
static ldap_pvt_thread_mutex_t ldap_int_gmtime_mutex;
#endif
#else /* ! LDAP_DEVEL */
ldap_pvt_thread_mutex_t ldap_int_gmtime_mutex;
#endif /* ! LDAP_DEVEL */
# if defined(HAVE_GETHOSTBYNAME_R) && \
(GETHOSTBYNAME_R_NARGS < 5) || (6 < GETHOSTBYNAME_R_NARGS)
/* Don't know how to handle this version, pretend it's not there */
# undef HAVE_GETHOSTBYNAME_R
# endif
# if defined(HAVE_GETHOSTBYADDR_R) && \
(GETHOSTBYADDR_R_NARGS < 7) || (8 < GETHOSTBYADDR_R_NARGS)
/* Don't know how to handle this version, pretend it's not there */
# undef HAVE_GETHOSTBYADDR_R
# endif
#endif /* LDAP_R_COMPILE */
char *ldap_pvt_ctime( const time_t *tp, char *buf )
{
#ifdef USE_CTIME_R
# if (CTIME_R_NARGS > 3) || (CTIME_R_NARGS < 2)
# error "CTIME_R_NARGS should be 2 or 3"
# elif CTIME_R_NARGS > 2 && defined(CTIME_R_RETURNS_INT)
return( ctime_r(tp,buf,26) < 0 ? 0 : buf );
# elif CTIME_R_NARGS > 2
return ctime_r(tp,buf,26);
# else
return ctime_r(tp,buf);
# endif
#else
LDAP_MUTEX_LOCK( &ldap_int_ctime_mutex );
AC_MEMCPY( buf, ctime(tp), 26 );
LDAP_MUTEX_UNLOCK( &ldap_int_ctime_mutex );
return buf;
#endif
}
#if !defined( USE_GMTIME_R ) || !defined( USE_LOCALTIME_R )
int
ldap_pvt_gmtime_lock( void )
{
# ifndef LDAP_R_COMPILE
return 0;
# else /* LDAP_R_COMPILE */
return ldap_pvt_thread_mutex_lock( &ldap_int_gmtime_mutex );
# endif /* LDAP_R_COMPILE */
}
int
ldap_pvt_gmtime_unlock( void )
{
# ifndef LDAP_R_COMPILE
return 0;
# else /* LDAP_R_COMPILE */
return ldap_pvt_thread_mutex_unlock( &ldap_int_gmtime_mutex );
# endif /* LDAP_R_COMPILE */
}
#endif /* !USE_GMTIME_R || !USE_LOCALTIME_R */
#ifndef USE_GMTIME_R
struct tm *
ldap_pvt_gmtime( const time_t *timep, struct tm *result )
{
struct tm *tm_ptr;
LDAP_MUTEX_LOCK( &ldap_int_gmtime_mutex );
tm_ptr = gmtime( timep );
if ( tm_ptr == NULL ) {
result = NULL;
} else {
*result = *tm_ptr;
}
LDAP_MUTEX_UNLOCK( &ldap_int_gmtime_mutex );
return result;
}
#endif /* !USE_GMTIME_R */
#ifndef USE_LOCALTIME_R
struct tm *
ldap_pvt_localtime( const time_t *timep, struct tm *result )
{
struct tm *tm_ptr;
LDAP_MUTEX_LOCK( &ldap_int_gmtime_mutex );
tm_ptr = localtime( timep );
if ( tm_ptr == NULL ) {
result = NULL;
} else {
*result = *tm_ptr;
}
LDAP_MUTEX_UNLOCK( &ldap_int_gmtime_mutex );
return result;
}
#endif /* !USE_LOCALTIME_R */
static int _ldap_pvt_gt_subs;
#ifdef _WIN32
/* Windows SYSTEMTIME only has 10 millisecond resolution, so we
* also need to use a high resolution timer to get microseconds.
* This is pretty clunky.
*/
static LARGE_INTEGER _ldap_pvt_gt_freq;
static LARGE_INTEGER _ldap_pvt_gt_prev;
static int _ldap_pvt_gt_offset;
#define SEC_TO_UNIX_EPOCH 11644473600LL
#define TICKS_PER_SECOND 10000000
static int
ldap_pvt_gettimeusec(int *sec)
{
LARGE_INTEGER count;
QueryPerformanceCounter( &count );
/* It shouldn't ever go backwards, but multiple CPUs might
* be able to hit in the same tick.
*/
LDAP_MUTEX_LOCK( &ldap_int_gettime_mutex );
/* We assume Windows has at least a vague idea of
* when a second begins. So we align our microsecond count
* with the Windows millisecond count using this offset.
* We retain the submillisecond portion of our own count.
*
* Note - this also assumes that the relationship between
* the PerformanceCounter and SystemTime stays constant;
* that assumption breaks if the SystemTime is adjusted by
* an external action.
*/
if ( !_ldap_pvt_gt_freq.QuadPart ) {
LARGE_INTEGER c2;
ULARGE_INTEGER ut;
FILETIME ft0, ft1;
long long t;
int usec;
/* Initialize our offset */
QueryPerformanceFrequency( &_ldap_pvt_gt_freq );
/* Wait for a tick of the system time: 10-15ms */
GetSystemTimeAsFileTime( &ft0 );
do {
GetSystemTimeAsFileTime( &ft1 );
} while ( ft1.dwLowDateTime == ft0.dwLowDateTime );
ut.LowPart = ft1.dwLowDateTime;
ut.HighPart = ft1.dwHighDateTime;
QueryPerformanceCounter( &c2 );
/* get second and fraction portion of counter */
t = c2.QuadPart % (_ldap_pvt_gt_freq.QuadPart*10);
/* convert to microseconds */
t *= 1000000;
usec = t / _ldap_pvt_gt_freq.QuadPart;
ut.QuadPart /= 10;
ut.QuadPart %= 10000000;
_ldap_pvt_gt_offset = usec - ut.QuadPart;
count = c2;
}
if ( count.QuadPart <= _ldap_pvt_gt_prev.QuadPart ) {
_ldap_pvt_gt_subs++;
} else {
_ldap_pvt_gt_subs = 0;
_ldap_pvt_gt_prev = count;
}
LDAP_MUTEX_UNLOCK( &ldap_int_gettime_mutex );
/* convert to microseconds */
count.QuadPart %= _ldap_pvt_gt_freq.QuadPart*10;
count.QuadPart *= 1000000;
count.QuadPart /= _ldap_pvt_gt_freq.QuadPart;
count.QuadPart -= _ldap_pvt_gt_offset;
/* We've extracted the 1s and microseconds.
* The 1sec digit is used to detect wraparound in microsecnds.
*/
if (count.QuadPart < 0)
count.QuadPart += 10000000;
else if (count.QuadPart >= 10000000)
count.QuadPart -= 10000000;
*sec = count.QuadPart / 1000000;
return count.QuadPart % 1000000;
}
/* emulate POSIX gettimeofday */
int
ldap_pvt_gettimeofday( struct timeval *tv, void *unused )
{
FILETIME ft;
ULARGE_INTEGER ut;
int sec, sec0;
GetSystemTimeAsFileTime( &ft );
ut.LowPart = ft.dwLowDateTime;
ut.HighPart = ft.dwHighDateTime;
/* convert to usec */
ut.QuadPart /= (TICKS_PER_SECOND / 1000000);
tv->tv_usec = ldap_pvt_gettimeusec(&sec);
tv->tv_sec = ut.QuadPart / 1000000 - SEC_TO_UNIX_EPOCH;
/* check for carry from microseconds */
sec0 = tv->tv_sec % 10;
if (sec0 < sec || (sec0 == 9 && !sec))
tv->tv_sec++;
return 0;
}
/* return a broken out time, with microseconds
*/
void
ldap_pvt_gettime( struct lutil_tm *tm )
{
SYSTEMTIME st;
int sec, sec0;
static const char daysPerMonth[] = {
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
GetSystemTime( &st );
tm->tm_usec = ldap_pvt_gettimeusec(&sec);
tm->tm_usub = _ldap_pvt_gt_subs;
/* any difference larger than microseconds is
* already reflected in st
*/
tm->tm_sec = st.wSecond;
tm->tm_min = st.wMinute;
tm->tm_hour = st.wHour;
tm->tm_mday = st.wDay;
tm->tm_mon = st.wMonth - 1;
tm->tm_year = st.wYear - 1900;
/* check for carry from microseconds */
sec0 = tm->tm_sec % 10;
if (sec0 < sec || (sec0 == 9 && !sec)) {
tm->tm_sec++;
/* FIXME: we don't handle leap seconds */
if (tm->tm_sec > 59) {
tm->tm_sec = 0;
tm->tm_min++;
if (tm->tm_min > 59) {
tm->tm_min = 0;
tm->tm_hour++;
if (tm->tm_hour > 23) {
int days = daysPerMonth[tm->tm_mon];
tm->tm_hour = 0;
tm->tm_mday++;
/* if it's February of a leap year,
* add 1 day to this month
*/
if (tm->tm_mon == 1 &&
((!(st.wYear % 4) && (st.wYear % 100)) ||
!(st.wYear % 400)))
days++;
if (tm->tm_mday > days) {
tm->tm_mday = 1;
tm->tm_mon++;
if (tm->tm_mon > 11) {
tm->tm_mon = 0;
tm->tm_year++;
}
}
}
}
}
}
}
#else
static struct timeval _ldap_pvt_gt_prevTv;
void
ldap_pvt_gettime( struct lutil_tm *ltm )
{
struct timeval tv;
struct tm tm;
time_t t;
gettimeofday( &tv, NULL );
t = tv.tv_sec;
LDAP_MUTEX_LOCK( &ldap_int_gettime_mutex );
if ( tv.tv_sec < _ldap_pvt_gt_prevTv.tv_sec
|| ( tv.tv_sec == _ldap_pvt_gt_prevTv.tv_sec
&& tv.tv_usec <= _ldap_pvt_gt_prevTv.tv_usec )) {
_ldap_pvt_gt_subs++;
} else {
_ldap_pvt_gt_subs = 0;
_ldap_pvt_gt_prevTv = tv;
}
LDAP_MUTEX_UNLOCK( &ldap_int_gettime_mutex );
ltm->tm_usub = _ldap_pvt_gt_subs;
ldap_pvt_gmtime( &t, &tm );
ltm->tm_sec = tm.tm_sec;
ltm->tm_min = tm.tm_min;
ltm->tm_hour = tm.tm_hour;
ltm->tm_mday = tm.tm_mday;
ltm->tm_mon = tm.tm_mon;
ltm->tm_year = tm.tm_year;
ltm->tm_usec = tv.tv_usec;
}
#endif
size_t
ldap_pvt_csnstr(char *buf, size_t len, unsigned int replica, unsigned int mod)
{
struct lutil_tm tm;
int n;
ldap_pvt_gettime( &tm );
n = snprintf( buf, len,
"%4d%02d%02d%02d%02d%02d.%06dZ#%06x#%03x#%06x",
tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour,
tm.tm_min, tm.tm_sec, tm.tm_usec, tm.tm_usub, replica, mod );
if( n < 0 ) return 0;
return ( (size_t) n < len ) ? n : 0;
}
#define BUFSTART (1024-32)
#define BUFMAX (32*1024-32)
#if defined(LDAP_R_COMPILE)
static char *safe_realloc( char **buf, int len );
#if !(defined(HAVE_GETHOSTBYNAME_R) && defined(HAVE_GETHOSTBYADDR_R))
static int copy_hostent( struct hostent *res,
char **buf, struct hostent * src );
#endif
#endif
int ldap_pvt_gethostbyname_a(
const char *name,
struct hostent *resbuf,
char **buf,
struct hostent **result,
int *herrno_ptr )
{
#if defined( HAVE_GETHOSTBYNAME_R )
# define NEED_SAFE_REALLOC 1
int r=-1;
int buflen=BUFSTART;
*buf = NULL;
for(;buflen<BUFMAX;) {
if (safe_realloc( buf, buflen )==NULL)
return r;
#if (GETHOSTBYNAME_R_NARGS < 6)
*result=gethostbyname_r( name, resbuf, *buf, buflen, herrno_ptr );
r = (*result == NULL) ? -1 : 0;
#else
r = gethostbyname_r( name, resbuf, *buf,
buflen, result, herrno_ptr );
#endif
Debug( LDAP_DEBUG_TRACE, "ldap_pvt_gethostbyname_a: host=%s, r=%d\n",
name, r, 0 );
#ifdef NETDB_INTERNAL
if ((r<0) &&
(*herrno_ptr==NETDB_INTERNAL) &&
(errno==ERANGE))
{
buflen*=2;
continue;
}
#endif
return r;
}
return -1;
#elif defined( LDAP_R_COMPILE )
# define NEED_COPY_HOSTENT
struct hostent *he;
int retval;
*buf = NULL;
LDAP_MUTEX_LOCK( &ldap_int_resolv_mutex );
he = gethostbyname( name );
if (he==NULL) {
*herrno_ptr = h_errno;
retval = -1;
} else if (copy_hostent( resbuf, buf, he )<0) {
*herrno_ptr = -1;
retval = -1;
} else {
*result = resbuf;
retval = 0;
}
LDAP_MUTEX_UNLOCK( &ldap_int_resolv_mutex );
return retval;
#else
*buf = NULL;
*result = gethostbyname( name );
if (*result!=NULL) {
return 0;
}
*herrno_ptr = h_errno;
return -1;
#endif
}
#if !defined( HAVE_GETNAMEINFO ) && !defined( HAVE_HSTRERROR )
static const char *
hp_strerror( int err )
{
switch (err) {
case HOST_NOT_FOUND: return _("Host not found (authoritative)");
case TRY_AGAIN: return _("Host not found (server fail?)");
case NO_RECOVERY: return _("Non-recoverable failure");
case NO_DATA: return _("No data of requested type");
#ifdef NETDB_INTERNAL
case NETDB_INTERNAL: return STRERROR( errno );
#endif
}
return _("Unknown resolver error");
}
#endif
int ldap_pvt_get_hname(
const struct sockaddr *sa,
int len,
char *name,
int namelen,
char **err )
{
int rc;
#if defined( HAVE_GETNAMEINFO )
LDAP_MUTEX_LOCK( &ldap_int_resolv_mutex );
rc = getnameinfo( sa, len, name, namelen, NULL, 0, 0 );
LDAP_MUTEX_UNLOCK( &ldap_int_resolv_mutex );
if ( rc ) *err = (char *)AC_GAI_STRERROR( rc );
return rc;
#else /* !HAVE_GETNAMEINFO */
char *addr;
int alen;
struct hostent *hp = NULL;
#ifdef HAVE_GETHOSTBYADDR_R
struct hostent hb;
int buflen=BUFSTART, h_errno;
char *buf=NULL;
#endif
#ifdef LDAP_PF_INET6
if (sa->sa_family == AF_INET6) {
struct sockaddr_in6 *sin = (struct sockaddr_in6 *)sa;
addr = (char *)&sin->sin6_addr;
alen = sizeof(sin->sin6_addr);
} else
#endif
if (sa->sa_family == AF_INET) {
struct sockaddr_in *sin = (struct sockaddr_in *)sa;
addr = (char *)&sin->sin_addr;
alen = sizeof(sin->sin_addr);
} else {
rc = NO_RECOVERY;
*err = (char *)HSTRERROR( rc );
return rc;
}
#if defined( HAVE_GETHOSTBYADDR_R )
for(;buflen<BUFMAX;) {
if (safe_realloc( &buf, buflen )==NULL) {
*err = (char *)STRERROR( ENOMEM );
return ENOMEM;
}
#if (GETHOSTBYADDR_R_NARGS < 8)
hp=gethostbyaddr_r( addr, alen, sa->sa_family,
&hb, buf, buflen, &h_errno );
rc = (hp == NULL) ? -1 : 0;
#else
rc = gethostbyaddr_r( addr, alen, sa->sa_family,
&hb, buf, buflen,
&hp, &h_errno );
#endif
#ifdef NETDB_INTERNAL
if ((rc<0) &&
(h_errno==NETDB_INTERNAL) &&
(errno==ERANGE))
{
buflen*=2;
continue;
}
#endif
break;
}
if (hp) {
strncpy( name, hp->h_name, namelen );
} else {
*err = (char *)HSTRERROR( h_errno );
}
LDAP_FREE(buf);
#else /* HAVE_GETHOSTBYADDR_R */
LDAP_MUTEX_LOCK( &ldap_int_resolv_mutex );
hp = gethostbyaddr( addr, alen, sa->sa_family );
if (hp) {
strncpy( name, hp->h_name, namelen );
rc = 0;
} else {
rc = h_errno;
*err = (char *)HSTRERROR( h_errno );
}
LDAP_MUTEX_UNLOCK( &ldap_int_resolv_mutex );
#endif /* !HAVE_GETHOSTBYADDR_R */
return rc;
#endif /* !HAVE_GETNAMEINFO */
}
int ldap_pvt_gethostbyaddr_a(
const char *addr,
int len,
int type,
struct hostent *resbuf,
char **buf,
struct hostent **result,
int *herrno_ptr )
{
#if defined( HAVE_GETHOSTBYADDR_R )
# undef NEED_SAFE_REALLOC
# define NEED_SAFE_REALLOC
int r=-1;
int buflen=BUFSTART;
*buf = NULL;
for(;buflen<BUFMAX;) {
if (safe_realloc( buf, buflen )==NULL)
return r;
#if (GETHOSTBYADDR_R_NARGS < 8)
*result=gethostbyaddr_r( addr, len, type,
resbuf, *buf, buflen, herrno_ptr );
r = (*result == NULL) ? -1 : 0;
#else
r = gethostbyaddr_r( addr, len, type,
resbuf, *buf, buflen,
result, herrno_ptr );
#endif
#ifdef NETDB_INTERNAL
if ((r<0) &&
(*herrno_ptr==NETDB_INTERNAL) &&
(errno==ERANGE))
{
buflen*=2;
continue;
}
#endif
return r;
}
return -1;
#elif defined( LDAP_R_COMPILE )
# undef NEED_COPY_HOSTENT
# define NEED_COPY_HOSTENT
struct hostent *he;
int retval;
*buf = NULL;
LDAP_MUTEX_LOCK( &ldap_int_resolv_mutex );
he = gethostbyaddr( addr, len, type );
if (he==NULL) {
*herrno_ptr = h_errno;
retval = -1;
} else if (copy_hostent( resbuf, buf, he )<0) {
*herrno_ptr = -1;
retval = -1;
} else {
*result = resbuf;
retval = 0;
}
LDAP_MUTEX_UNLOCK( &ldap_int_resolv_mutex );
return retval;
#else /* gethostbyaddr() */
*buf = NULL;
*result = gethostbyaddr( addr, len, type );
if (*result!=NULL) {
return 0;
}
return -1;
#endif
}
/*
* ldap_int_utils_init() should be called before any other function.
*/
void ldap_int_utils_init( void )
{
static int done=0;
if (done)
return;
done=1;
#ifdef LDAP_R_COMPILE
#if !defined( USE_CTIME_R ) && !defined( HAVE_REENTRANT_FUNCTIONS )
ldap_pvt_thread_mutex_init( &ldap_int_ctime_mutex );
#endif
#if !defined( USE_GMTIME_R ) && !defined( USE_LOCALTIME_R )
ldap_pvt_thread_mutex_init( &ldap_int_gmtime_mutex );
#endif
ldap_pvt_thread_mutex_init( &ldap_int_resolv_mutex );
ldap_pvt_thread_mutex_init( &ldap_int_hostname_mutex );
ldap_pvt_thread_mutex_init( &ldap_int_gettime_mutex );
#ifdef HAVE_GSSAPI
ldap_pvt_thread_mutex_init( &ldap_int_gssapi_mutex );
#endif
#endif
/* call other module init functions here... */
}
#if defined( NEED_COPY_HOSTENT )
# undef NEED_SAFE_REALLOC
#define NEED_SAFE_REALLOC
static char *cpy_aliases(
char ***tgtio,
char *buf,
char **src )
{
int len;
char **tgt=*tgtio;
for( ; (*src) ; src++ ) {
len = strlen( *src ) + 1;
AC_MEMCPY( buf, *src, len );
*tgt++=buf;
buf+=len;
}
*tgtio=tgt;
return buf;
}
static char *cpy_addresses(
char ***tgtio,
char *buf,
char **src,
int len )
{
char **tgt=*tgtio;
for( ; (*src) ; src++ ) {
AC_MEMCPY( buf, *src, len );
*tgt++=buf;
buf+=len;
}
*tgtio=tgt;
return buf;
}
static int copy_hostent(
struct hostent *res,
char **buf,
struct hostent * src )
{
char **p;
char **tp;
char *tbuf;
int name_len;
int n_alias=0;
int total_alias_len=0;
int n_addr=0;
int total_addr_len=0;
int total_len;
/* calculate the size needed for the buffer */
name_len = strlen( src->h_name ) + 1;
if( src->h_aliases != NULL ) {
for( p = src->h_aliases; (*p) != NULL; p++ ) {
total_alias_len += strlen( *p ) + 1;
n_alias++;
}
}
if( src->h_addr_list != NULL ) {
for( p = src->h_addr_list; (*p) != NULL; p++ ) {
n_addr++;
}
total_addr_len = n_addr * src->h_length;
}
total_len = (n_alias + n_addr + 2) * sizeof( char * ) +
total_addr_len + total_alias_len + name_len;
if (safe_realloc( buf, total_len )) {
tp = (char **) *buf;
tbuf = *buf + (n_alias + n_addr + 2) * sizeof( char * );
AC_MEMCPY( res, src, sizeof( struct hostent ) );
/* first the name... */
AC_MEMCPY( tbuf, src->h_name, name_len );
res->h_name = tbuf; tbuf+=name_len;
/* now the aliases */
res->h_aliases = tp;
if ( src->h_aliases != NULL ) {
tbuf = cpy_aliases( &tp, tbuf, src->h_aliases );
}
*tp++=NULL;
/* finally the addresses */
res->h_addr_list = tp;
if ( src->h_addr_list != NULL ) {
tbuf = cpy_addresses( &tp, tbuf, src->h_addr_list, src->h_length );
}
*tp++=NULL;
return 0;
}
return -1;
}
#endif
#if defined( NEED_SAFE_REALLOC )
static char *safe_realloc( char **buf, int len )
{
char *tmpbuf;
tmpbuf = LDAP_REALLOC( *buf, len );
if (tmpbuf) {
*buf=tmpbuf;
}
return tmpbuf;
}
#endif
char * ldap_pvt_get_fqdn( char *name )
{
#ifdef HAVE_GETADDRINFO
struct addrinfo hints, *res;
#else
char *ha_buf;
struct hostent *hp, he_buf;
int local_h_errno;
#endif
int rc;
char *fqdn, hostbuf[MAXHOSTNAMELEN+1];
if( name == NULL ) {
if( gethostname( hostbuf, MAXHOSTNAMELEN ) == 0 ) {
hostbuf[MAXHOSTNAMELEN] = '\0';
name = hostbuf;
} else {
name = "localhost";
}
}
#ifdef HAVE_GETADDRINFO
memset( &hints, 0, sizeof( hints ));
hints.ai_family = AF_UNSPEC;
hints.ai_flags = AI_CANONNAME;
LDAP_MUTEX_LOCK( &ldap_int_resolv_mutex );
rc = getaddrinfo( name, NULL, &hints, &res );
LDAP_MUTEX_UNLOCK( &ldap_int_resolv_mutex );
if ( rc == 0 && res->ai_canonname ) {
fqdn = LDAP_STRDUP( res->ai_canonname );
} else {
fqdn = LDAP_STRDUP( name );
}
if ( rc == 0 )
freeaddrinfo( res );
#else
rc = ldap_pvt_gethostbyname_a( name,
&he_buf, &ha_buf, &hp, &local_h_errno );
if( rc < 0 || hp == NULL || hp->h_name == NULL ) {
fqdn = LDAP_STRDUP( name );
} else {
fqdn = LDAP_STRDUP( hp->h_name );
}
LDAP_FREE( ha_buf );
#endif
return fqdn;
}
#if ( defined( HAVE_GETADDRINFO ) || defined( HAVE_GETNAMEINFO ) ) \
&& !defined( HAVE_GAI_STRERROR )
char *ldap_pvt_gai_strerror (int code) {
static struct {
int code;
const char *msg;
} values[] = {
#ifdef EAI_ADDRFAMILY
{ EAI_ADDRFAMILY, N_("Address family for hostname not supported") },
#endif
{ EAI_AGAIN, N_("Temporary failure in name resolution") },
{ EAI_BADFLAGS, N_("Bad value for ai_flags") },
{ EAI_FAIL, N_("Non-recoverable failure in name resolution") },
{ EAI_FAMILY, N_("ai_family not supported") },
{ EAI_MEMORY, N_("Memory allocation failure") },
#ifdef EAI_NODATA
{ EAI_NODATA, N_("No address associated with hostname") },
#endif
{ EAI_NONAME, N_("Name or service not known") },
{ EAI_SERVICE, N_("Servname not supported for ai_socktype") },
{ EAI_SOCKTYPE, N_("ai_socktype not supported") },
#ifdef EAI_SYSTEM
{ EAI_SYSTEM, N_("System error") },
#endif
{ 0, NULL }
};
int i;
for ( i = 0; values[i].msg != NULL; i++ ) {
if ( values[i].code == code ) {
return (char *) _(values[i].msg);
}
}
return _("Unknown error");
}
#endif
|