-
Notifications
You must be signed in to change notification settings - Fork 80
/
connection.c
2849 lines (2545 loc) · 89.4 KB
/
connection.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/** BEGIN COPYRIGHT BLOCK
* This Program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation; version 2 of the License.
*
* This Program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* this Program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place, Suite 330, Boston, MA 02111-1307 USA.
*
* In addition, as a special exception, Red Hat, Inc. gives You the additional
* right to link the code of this Program with code not covered under the GNU
* General Public License ("Non-GPL Code") and to distribute linked combinations
* including the two, subject to the limitations in this paragraph. Non-GPL Code
* permitted under this exception must only link to the code of this Program
* through those well defined interfaces identified in the file named EXCEPTION
* found in the source code files (the "Approved Interfaces"). The files of
* Non-GPL Code may instantiate templates or use macros or inline functions from
* the Approved Interfaces without causing the resulting work to be covered by
* the GNU General Public License. Only Red Hat, Inc. may make changes or
* additions to the list of Approved Interfaces. You must obey the GNU General
* Public License in all respects for all of the Program code and other code used
* in conjunction with the Program except the Non-GPL Code covered by this
* exception. If you modify this file, you may extend this exception to your
* version of the file, but you are not obligated to do so. If you do not wish to
* provide this exception without modification, you must delete this exception
* statement from your version and license this file solely under the GPL without
* exception.
*
*
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#ifndef _WIN32
#include <sys/time.h>
#include <sys/socket.h>
#include <stdlib.h>
#endif
#include <signal.h>
#include "slap.h"
#include "prcvar.h"
#include "prlog.h" /* for PR_ASSERT */
#include "fe.h"
#include <sasl.h>
#if defined(LINUX)
#include <netinet/tcp.h> /* for TCP_CORK */
#endif
static void connection_threadmain( void );
static void add_pb( Slapi_PBlock * );
static Slapi_PBlock *get_pb( void );
static void connection_add_operation(Connection* conn, Operation *op);
static void connection_free_private_buffer(Connection *conn);
static void op_copy_identity(Connection *conn, Operation *op);
static void connection_set_ssl_ssf(Connection *conn);
static int is_ber_too_big(const Connection *conn, ber_len_t ber_len);
static void log_ber_too_big_error(const Connection *conn,
ber_len_t ber_len, ber_len_t maxbersize);
/*
* We maintain a global work queue of Slapi_PBlock's that have not yet
* been handed off to an operation thread.
*/
struct Slapi_PBlock_q
{
Slapi_PBlock *pb;
struct Slapi_PBlock_q *next_pb;
int pb_fd;
};
static struct Slapi_PBlock_q *first_pb= NULL; /* global work queue head */
static struct Slapi_PBlock_q *last_pb= NULL; /* global work queue tail */
static PRLock *pb_q_lock=NULL; /* protects first_pb & last_pb */
static PRCondVar *op_thread_cv; /* used by operation threads to wait for work */
static PRLock *op_thread_lock; /* associated with op_thread_cv */
static int op_shutdown= 0; /* if non-zero, server is shutting down */
#define LDAP_SOCKET_IO_BUFFER_SIZE 512 /* Size of the buffer we give to the I/O system for reads */
/*
* We really are done with this connection. Get rid of everything.
*
* Note: this function should be called with conn->c_mutex already locked
* or at a time when multiple threads are not in play that might touch the
* connection structure.
*/
void
connection_done(Connection *conn)
{
connection_cleanup(conn);
/* free the private content, the buffer has been freed by above connection_cleanup */
slapi_ch_free((void**)&conn->c_private);
if (NULL != conn->c_sb)
{
ber_sockbuf_free(conn->c_sb);
}
if (NULL != conn->c_mutex)
{
PR_DestroyLock(conn->c_mutex);
}
if (NULL != conn->c_pdumutex)
{
PR_DestroyLock(conn->c_pdumutex);
}
}
/*
* We're going to be making use of this connection again.
* So, get rid of everything we can't make use of.
*
* Note: this function should be called with conn->c_mutex already locked
* or at a time when multiple threads are not in play that might touch the
* connection structure.
*/
void
connection_cleanup(Connection *conn)
{
bind_credentials_clear( conn, PR_FALSE /* do not lock conn */,
PR_TRUE /* clear external creds. */ );
slapi_ch_free((void**)&conn->c_authtype);
/* Call the plugin extension destructors */
factory_destroy_extension(connection_type,conn,NULL/*Parent*/,&(conn->c_extension));
/*
* We hang onto these, since we can reuse them.
* Sockbuf *c_sb;
* PRLock *c_mutex;
* PRLock *c_pdumutex;
* Conn_private *c_private;
*/
#ifdef _WIN32
if (conn->c_prfd && (conn->c_flags & CONN_FLAG_SSL))
{
LDAPDebug( LDAP_DEBUG_CONNS,
"conn=%" PRIu64 " fd=%d closed now\n",
conn->c_connid, conn->c_sd,0);
PR_Close(conn->c_prfd);
}
else if (conn->c_sd)
{
LDAPDebug( LDAP_DEBUG_CONNS,
"conn=%" PRIu64 " fd=%d closed now\n",
conn->c_connid, conn->c_sd,0);
closesocket(conn->c_sd);
}
#else
if (conn->c_prfd)
{
PR_Close(conn->c_prfd);
}
#endif
conn->c_sd= SLAPD_INVALID_SOCKET;
conn->c_ldapversion= 0;
conn->c_isreplication_session = 0;
slapi_ch_free((void**)&conn->cin_addr );
slapi_ch_free((void**)&conn->cin_destaddr );
if ( conn->c_domain != NULL )
{
ber_bvecfree( conn->c_domain );
conn->c_domain = NULL;
}
/* conn->c_ops= NULL; */
conn->c_gettingber= 0;
conn->c_currentber= NULL;
conn->c_starttime= 0;
conn->c_connid= 0;
conn->c_opsinitiated= 0;
conn->c_opscompleted= 0;
conn->c_threadnumber= 0;
conn->c_refcnt= 0;
conn->c_idlesince= 0;
conn->c_flags= 0;
conn->c_needpw= 0;
conn->c_prfd= NULL;
/* c_ci stays as it is */
conn->c_fdi= SLAPD_INVALID_SOCKET_INDEX;
conn->c_next= NULL;
conn->c_prev= NULL;
conn->c_extension= NULL;
conn->c_ssl_ssf = 0;
conn->c_local_ssf = 0;
conn->c_unix_local = 0;
/* destroy any sasl context */
sasl_dispose((sasl_conn_t**)&conn->c_sasl_conn);
/* PAGED_RESULTS */
pagedresults_cleanup(conn, 0 /* do not need to lock inside */);
/* free the connection socket buffer */
connection_free_private_buffer(conn);
}
/*
* Callers of connection_reset() must hold the conn->c_mutex lock.
*/
void
connection_reset(Connection* conn, int ns, PRNetAddr * from, int fromLen, int is_SSL)
{
char * pTmp = is_SSL ? "SSL " : "";
char *str_ip = NULL, *str_destip;
char buf_ip[ 256 ], buf_destip[ 256 ];
char *str_unknown = "unknown";
int in_referral_mode = config_check_referral_mode();
LDAPDebug( LDAP_DEBUG_CONNS, "new %sconnection on %d\n", pTmp, conn->c_sd, 0 );
/* bump our count of connections and update SNMP stats */
conn->c_connid = slapi_counter_increment(num_conns);
if (! in_referral_mode) {
slapi_counter_increment(g_get_global_snmp_vars()->ops_tbl.dsConnectionSeq);
slapi_counter_increment(g_get_global_snmp_vars()->ops_tbl.dsConnections);
}
/*
* get peer address (IP address of this client)
*/
slapi_ch_free( (void**)&conn->cin_addr ); /* just to be conservative */
if ( from->raw.family == PR_AF_LOCAL ) { /* ldapi */
conn->cin_addr = (PRNetAddr *) slapi_ch_malloc( sizeof( PRNetAddr ) );
PL_strncpyz(buf_ip, from->local.path, sizeof(from->local.path));
memcpy( conn->cin_addr, from, sizeof( PRNetAddr ) );
if (!buf_ip[0]) {
PR_GetPeerName( conn->c_prfd, from );
PL_strncpyz(buf_ip, from->local.path, sizeof(from->local.path));
memcpy( conn->cin_addr, from, sizeof( PRNetAddr ) );
}
if (!buf_ip[0]) {
/* cannot derive local address */
/* need something for logging */
PL_strncpyz(buf_ip, "local", sizeof(buf_ip));
}
str_ip = buf_ip;
} else if ( ((from->ipv6.ip.pr_s6_addr32[0] != 0) || /* from contains non zeros */
(from->ipv6.ip.pr_s6_addr32[1] != 0) ||
(from->ipv6.ip.pr_s6_addr32[2] != 0) ||
(from->ipv6.ip.pr_s6_addr32[3] != 0)) ||
((conn->c_prfd != NULL) && (PR_GetPeerName( conn->c_prfd, from ) == 0)) ) {
conn->cin_addr = (PRNetAddr *) slapi_ch_malloc( sizeof( PRNetAddr ) );
memcpy( conn->cin_addr, from, sizeof( PRNetAddr ) );
if ( PR_IsNetAddrType( conn->cin_addr, PR_IpAddrV4Mapped ) ) {
PRNetAddr v4addr;
memset( &v4addr, 0, sizeof( v4addr ) );
v4addr.inet.family = PR_AF_INET;
v4addr.inet.ip = conn->cin_addr->ipv6.ip.pr_s6_addr32[3];
PR_NetAddrToString( &v4addr, buf_ip, sizeof( buf_ip ) );
} else {
PR_NetAddrToString( conn->cin_addr, buf_ip, sizeof( buf_ip ) );
}
buf_ip[ sizeof( buf_ip ) - 1 ] = '\0';
str_ip = buf_ip;
} else {
/* try syscall since "from" was not given and PR_GetPeerName failed */
/* a corner case */
struct sockaddr_in addr; /* assuming IPv4 */
#if ( defined( hpux ) )
int addrlen;
#else
socklen_t addrlen;
#endif
addrlen = sizeof( addr );
memset( &addr, 0, addrlen );
if ( (conn->c_prfd == NULL) &&
(getpeername( conn->c_sd, (struct sockaddr *)&addr, &addrlen )
== 0) ) {
conn->cin_addr = (PRNetAddr *)slapi_ch_malloc( sizeof( PRNetAddr ));
memset( conn->cin_addr, 0, sizeof( PRNetAddr ) );
PR_NetAddrFamily( conn->cin_addr ) = AF_INET6;
/* note: IPv4-mapped IPv6 addr does not work on Windows */
PR_ConvertIPv4AddrToIPv6(addr.sin_addr.s_addr, &(conn->cin_addr->ipv6.ip));
PRLDAP_SET_PORT(conn->cin_addr, addr.sin_port);
/* copy string equivalent of address into a buffer to use for
* logging since each call to inet_ntoa() returns a pointer to a
* single thread-specific buffer (which prevents us from calling
* inet_ntoa() twice in one call to slapi_log_access()).
*/
str_ip = inet_ntoa( addr.sin_addr );
strncpy( buf_ip, str_ip, sizeof( buf_ip ) - 1 );
buf_ip[ sizeof( buf_ip ) - 1 ] = '\0';
str_ip = buf_ip;
} else {
str_ip = str_unknown;
}
}
/*
* get destination address (server IP address this client connected to)
*/
slapi_ch_free( (void**)&conn->cin_destaddr ); /* just to be conservative */
if ( conn->c_prfd != NULL ) {
conn->cin_destaddr = (PRNetAddr *) slapi_ch_malloc( sizeof( PRNetAddr ) );
memset( conn->cin_destaddr, 0, sizeof( PRNetAddr ));
if (PR_GetSockName( conn->c_prfd, conn->cin_destaddr ) == 0) {
if ( conn->cin_destaddr->raw.family == PR_AF_LOCAL ) { /* ldapi */
PL_strncpyz(buf_destip, conn->cin_destaddr->local.path,
sizeof(conn->cin_destaddr->local.path));
if (!buf_destip[0]) {
PL_strncpyz(buf_destip, "unknown local file", sizeof(buf_destip));
}
} else if ( PR_IsNetAddrType( conn->cin_destaddr, PR_IpAddrV4Mapped ) ) {
PRNetAddr v4destaddr;
memset( &v4destaddr, 0, sizeof( v4destaddr ) );
v4destaddr.inet.family = PR_AF_INET;
v4destaddr.inet.ip = conn->cin_destaddr->ipv6.ip.pr_s6_addr32[3];
PR_NetAddrToString( &v4destaddr, buf_destip, sizeof( buf_destip ) );
} else {
PR_NetAddrToString( conn->cin_destaddr, buf_destip, sizeof( buf_destip ) );
}
buf_destip[ sizeof( buf_destip ) - 1 ] = '\0';
str_destip = buf_destip;
} else {
str_destip = str_unknown;
}
} else {
/* try syscall since c_prfd == NULL */
/* a corner case */
struct sockaddr_in destaddr; /* assuming IPv4 */
#if ( defined( hpux ) )
int destaddrlen;
#else
socklen_t destaddrlen;
#endif
destaddrlen = sizeof( destaddr );
memset( &destaddr, 0, destaddrlen );
if ( (getsockname( conn->c_sd, (struct sockaddr *)&destaddr,
&destaddrlen ) == 0) ) {
conn->cin_destaddr =
(PRNetAddr *)slapi_ch_malloc( sizeof( PRNetAddr ));
memset( conn->cin_destaddr, 0, sizeof( PRNetAddr ));
PR_NetAddrFamily( conn->cin_destaddr ) = AF_INET6;
PRLDAP_SET_PORT( conn->cin_destaddr, destaddr.sin_port );
/* note: IPv4-mapped IPv6 addr does not work on Windows */
PR_ConvertIPv4AddrToIPv6(destaddr.sin_addr.s_addr,
&(conn->cin_destaddr->ipv6.ip));
/* copy string equivalent of address into a buffer to use for
* logging since each call to inet_ntoa() returns a pointer to a
* single thread-specific buffer (which prevents us from calling
* inet_ntoa() twice in one call to slapi_log_access()).
*/
str_destip = inet_ntoa( destaddr.sin_addr );
strncpy( buf_destip, str_destip, sizeof( buf_destip ) - 1 );
buf_destip[ sizeof( buf_destip ) - 1 ] = '\0';
str_destip = buf_destip;
} else {
str_destip = str_unknown;
}
}
if ( !in_referral_mode ) {
/* create a sasl connection */
ids_sasl_server_new(conn);
}
/* log useful stuff to our access log */
slapi_log_access( LDAP_DEBUG_STATS,
"conn=%" NSPRIu64 " fd=%d slot=%d %sconnection from %s to %s\n",
conn->c_connid, conn->c_sd, ns, pTmp, str_ip, str_destip );
/* initialize the remaining connection fields */
conn->c_ldapversion = LDAP_VERSION3;
conn->c_starttime = current_time();
conn->c_idlesince = conn->c_starttime;
conn->c_flags = is_SSL ? CONN_FLAG_SSL : 0;
conn->c_authtype = slapi_ch_strdup(SLAPD_AUTH_NONE);
/* Just initialize the SSL SSF to 0 now since the handshake isn't complete
* yet, which prevents us from getting the effective key length. */
conn->c_ssl_ssf = 0;
conn->c_local_ssf = 0;
}
/* Create a pool of threads for handling the operations */
void
init_op_threads()
{
int i;
PRErrorCode errorCode;
int max_threads = config_get_threadnumber();
/* Initialize the locks and cv */
if ((pb_q_lock = PR_NewLock()) == NULL ) {
errorCode = PR_GetError();
LDAPDebug( LDAP_DEBUG_ANY,
"init_op_threads: PR_NewLock failed, " SLAPI_COMPONENT_NAME_NSPR " error %d (%s)\n",
errorCode, slapd_pr_strerror(errorCode), 0 );
exit(-1);
}
if ((op_thread_lock = PR_NewLock()) == NULL ) {
errorCode = PR_GetError();
LDAPDebug( LDAP_DEBUG_ANY,
"init_op_threads: PR_NewLock failed, " SLAPI_COMPONENT_NAME_NSPR " error %d (%s)\n",
errorCode, slapd_pr_strerror(errorCode), 0 );
exit(-1);
}
if ((op_thread_cv = PR_NewCondVar( op_thread_lock )) == NULL) {
errorCode = PR_GetError();
LDAPDebug( LDAP_DEBUG_ANY, "init_op_threads: PR_NewCondVar failed, " SLAPI_COMPONENT_NAME_NSPR " error %d (%s)\n",
errorCode, slapd_pr_strerror(errorCode), 0 );
exit(-1);
}
/* start the operation threads */
for (i=0; i < max_threads; i++) {
PR_SetConcurrency(4);
if (PR_CreateThread (PR_USER_THREAD,
(VFP) (void *) connection_threadmain, NULL,
PR_PRIORITY_NORMAL, PR_GLOBAL_THREAD,
PR_UNJOINABLE_THREAD,
SLAPD_DEFAULT_THREAD_STACKSIZE
) == NULL ) {
int prerr = PR_GetError();
LDAPDebug( LDAP_DEBUG_ANY, "PR_CreateThread failed, " SLAPI_COMPONENT_NAME_NSPR " error %d (%s)\n",
prerr, slapd_pr_strerror( prerr ), 0 );
} else {
g_incr_active_threadcnt();
}
}
}
static void
referral_mode_reply(Slapi_PBlock *pb)
{
struct slapdplugin *plugin;
plugin = (struct slapdplugin *) slapi_ch_calloc(1, sizeof(struct slapdplugin));
if (plugin!=NULL)
{
struct berval *urls[2], url;
char *refer;
refer = config_get_referral_mode();
pb->pb_plugin = plugin;
set_db_default_result_handlers(pb);
urls[0] = &url;
urls[1] = NULL;
url.bv_val = refer;
url.bv_len = refer ? strlen(refer) : 0;
slapi_send_ldap_result(pb, LDAP_REFERRAL, NULL, NULL, 0, urls);
slapi_ch_free((void **)&plugin);
slapi_ch_free((void **)&refer);
}
}
static int
connection_need_new_password(const Connection *conn, const Operation *op, Slapi_PBlock *pb)
{
int r= 0;
/*
* add tag != LDAP_REQ_SEARCH to allow admin server 3.5 to do
* searches when the user needs to reset
* the pw the first time logon.
* LP: 22 Dec 2000: Removing LDAP_REQ_SEARCH. It's very unlikely that AS 3.5 will
* be used to manage DS5.0
*/
if ( conn->c_needpw && op->o_tag != LDAP_REQ_MODIFY &&
op->o_tag != LDAP_REQ_BIND && op->o_tag != LDAP_REQ_UNBIND &&
op->o_tag != LDAP_REQ_ABANDON && op->o_tag != LDAP_REQ_EXTENDED)
{
slapi_add_pwd_control ( pb, LDAP_CONTROL_PWEXPIRED, 0);
slapi_log_access( LDAP_DEBUG_STATS, "conn=%" NSPRIu64 " op=%d %s\n",
pb->pb_conn->c_connid, pb->pb_op->o_opid,
"UNPROCESSED OPERATION - need new password" );
send_ldap_result( pb, LDAP_UNWILLING_TO_PERFORM,
NULL, NULL, 0, NULL );
r= 1;
}
return r;
}
static void
connection_dispatch_operation(Connection *conn, Operation *op, Slapi_PBlock *pb)
{
int minssf = config_get_minssf();
int minssf_exclude_rootdse = 0;
/* Get the effective key length now since the first SSL handshake should be complete */
connection_set_ssl_ssf( conn );
/* Copy the Connection DN and SSF into the operation struct */
op_copy_identity( conn, op );
/* If the minimum SSF requirements are not met, only allow
* bind and extended operations through. The bind and extop
* code will ensure that only SASL binds and startTLS are
* allowed, which gives the connection a chance to meet the
* SSF requirements. We also allow UNBIND and ABANDON.*/
/*
* If nsslapd-minssf-exclude-rootdse is on, we have to go to the
* next step and check if the operation is against rootdse or not.
* Once found it's not on rootdse, return LDAP_UNWILLING_TO_PERFORM there.
*/
minssf_exclude_rootdse = config_get_minssf_exclude_rootdse();
if (!minssf_exclude_rootdse &&
(conn->c_sasl_ssf < minssf) && (conn->c_ssl_ssf < minssf) &&
(conn->c_local_ssf < minssf) &&(op->o_tag != LDAP_REQ_BIND) &&
(op->o_tag != LDAP_REQ_EXTENDED) && (op->o_tag != LDAP_REQ_UNBIND) &&
(op->o_tag != LDAP_REQ_ABANDON)) {
slapi_log_access( LDAP_DEBUG_STATS,
"conn=%" NSPRIu64 " op=%d UNPROCESSED OPERATION"
" - Insufficient SSF (local_ssf=%d sasl_ssf=%d ssl_ssf=%d)\n",
conn->c_connid, op->o_opid, conn->c_local_ssf,
conn->c_sasl_ssf, conn->c_ssl_ssf );
send_ldap_result( pb, LDAP_UNWILLING_TO_PERFORM, NULL,
"Minimum SSF not met.", 0, NULL );
return;
}
/* If anonymous access is disabled and the connection is
* not authenticated, only allow bind and extended operations.
* We allow extended operations so one can do a startTLS prior
* to binding to protect their credentials in transit.
* We also allow UNBIND and ABANDON.
*
* If anonymous access is only allowed for root DSE searches,
* we let SEARCH operations through as well. The search code
* is responsible for checking if the operation is a root DSE
* search. */
if ((slapi_sdn_get_dn(&(op->o_sdn)) == NULL ) &&
/* anon access off and something other than BIND, EXTOP, UNBIND or ABANDON */
(((config_get_anon_access_switch() == SLAPD_ANON_ACCESS_OFF) && (op->o_tag != LDAP_REQ_BIND) &&
(op->o_tag != LDAP_REQ_EXTENDED) && (op->o_tag != LDAP_REQ_UNBIND) && (op->o_tag != LDAP_REQ_ABANDON)) ||
/* root DSE access only and something other than BIND, EXTOP, UNBIND, ABANDON, or SEARCH */
((config_get_anon_access_switch() == SLAPD_ANON_ACCESS_ROOTDSE) && (op->o_tag != LDAP_REQ_BIND) &&
(op->o_tag != LDAP_REQ_EXTENDED) && (op->o_tag != LDAP_REQ_UNBIND) &&
(op->o_tag != LDAP_REQ_ABANDON) && (op->o_tag != LDAP_REQ_SEARCH)))) {
slapi_log_access( LDAP_DEBUG_STATS,
"conn=%" NSPRIu64 " op=%d UNPROCESSED OPERATION"
" - Anonymous access not allowed\n",
conn->c_connid, op->o_opid );
send_ldap_result( pb, LDAP_INAPPROPRIATE_AUTH, NULL,
"Anonymous access is not allowed.",
0, NULL );
return;
}
/* process the operation */
switch ( op->o_tag ) {
case LDAP_REQ_BIND:
operation_set_type(op,SLAPI_OPERATION_BIND);
do_bind( pb );
break;
case LDAP_REQ_UNBIND:
operation_set_type(op,SLAPI_OPERATION_UNBIND);
do_unbind( pb );
break;
case LDAP_REQ_ADD:
operation_set_type(op,SLAPI_OPERATION_ADD);
do_add( pb );
break;
case LDAP_REQ_DELETE:
operation_set_type(op,SLAPI_OPERATION_DELETE);
do_delete( pb );
break;
case LDAP_REQ_MODRDN:
operation_set_type(op,SLAPI_OPERATION_MODRDN);
do_modrdn( pb );
break;
case LDAP_REQ_MODIFY:
operation_set_type(op,SLAPI_OPERATION_MODIFY);
do_modify( pb );
break;
case LDAP_REQ_COMPARE:
operation_set_type(op,SLAPI_OPERATION_COMPARE);
do_compare( pb );
break;
case LDAP_REQ_SEARCH:
operation_set_type(op,SLAPI_OPERATION_SEARCH);
/* On Linux we can use TCP_CORK to get us 5-10% speed benefit when one entry is returned */
/* Nagle needs to be turned _off_, the default is off on linux, in daemon.c */
#if defined(LINUX)
{
int i = 1;
int ret = 0;
/* Set TCP_CORK here but only if this is not LDAPI */
if(!conn->c_unix_local)
{
ret = setsockopt(conn->c_sd,IPPROTO_TCP,TCP_CORK,&i,sizeof(i));
if (ret < 0) {
LDAPDebug(LDAP_DEBUG_ANY, "Failed to set TCP_CORK on connection %" NSPRIu64 "\n",conn->c_connid, 0, 0);
}
}
#endif
do_search( pb );
#if defined(LINUX)
/* Clear TCP_CORK to flush any unsent data but only if not LDAPI*/
i = 0;
if(!conn->c_unix_local)
{
ret = setsockopt(conn->c_sd,IPPROTO_TCP,TCP_CORK,&i,sizeof(i));
if (ret < 0) {
LDAPDebug(LDAP_DEBUG_ANY, "Failed to clear TCP_CORK on connection %" NSPRIu64 "\n",conn->c_connid, 0, 0);
}
}
}
#endif
break;
/* for some strange reason, the console is using this old obsolete
* value for ABANDON so we have to support it until the console
* get fixed
* otherwise the console has VERY BAD performances when a fair amount
* of entries are created in the DIT
*/
case LDAP_REQ_ABANDON_30:
case LDAP_REQ_ABANDON:
operation_set_type(op,SLAPI_OPERATION_ABANDON);
do_abandon( pb );
break;
case LDAP_REQ_EXTENDED:
operation_set_type(op,SLAPI_OPERATION_EXTENDED);
do_extended( pb );
break;
default:
LDAPDebug( LDAP_DEBUG_ANY,
"ignoring unknown LDAP request (conn=%" NSPRIu64 ", tag=0x%lx)\n",
conn->c_connid, op->o_tag, 0 );
break;
}
}
/* this function should be called under c_mutex */
int connection_release_nolock (Connection *conn)
{
if (conn->c_refcnt <= 0)
{
slapi_log_error(SLAPI_LOG_FATAL, "connection",
"conn=%" NSPRIu64 " fd=%d Attempt to release connection that is not acquired\n",
conn->c_connid, conn->c_sd);
PR_ASSERT (PR_FALSE);
return -1;
}
else
{
conn->c_refcnt--;
return 0;
}
}
/* this function should be called under c_mutex */
int connection_acquire_nolock (Connection *conn)
{
/* connection in the closing state can't be acquired */
if (conn->c_flags & CONN_FLAG_CLOSING)
{
/* This may happen while other threads are still working on this connection */
slapi_log_error(SLAPI_LOG_FATAL, "connection",
"conn=%" NSPRIu64 " fd=%d Attempt to acquire connection in the closing state\n",
conn->c_connid, conn->c_sd);
return -1;
}
else
{
conn->c_refcnt++;
return 0;
}
}
/* returns non-0 if connection can be reused and 0 otherwise */
int connection_is_free (Connection *conn)
{
int rc;
PR_Lock(conn->c_mutex);
rc = conn->c_sd == SLAPD_INVALID_SOCKET && conn->c_refcnt == 0 &&
!(conn->c_flags & CONN_FLAG_CLOSING);
PR_Unlock(conn->c_mutex);
return rc;
}
int connection_is_active_nolock (Connection *conn)
{
return (conn->c_sd != SLAPD_INVALID_SOCKET) &&
!(conn->c_flags & CONN_FLAG_CLOSING);
}
/* returns non-0 if this is an active connection meaning it is in use
and not in the closing mode */
#if defined LDAP_IOCP
/*
* IO Completion ports are currently only available on NT.
*/
typedef enum {read_data, write_data, new_connection} work_type;
static int wait_on_new_work(Connection **ppConn, work_type *type);
static int issue_new_read(Connection *conn);
static int finished_chomping(Connection *conn);
static int read_the_data(Connection *op, int *process_op, int *defer_io, int *defer_pushback);
static int is_new_operation(Connection *conn);
static int process_operation(Connection *conn, Operation *op);
static int connection_operation_new(Connection *conn, Operation **ppOp);
Operation *get_current_op(Connection *conn);
static int handle_read_data(Connection *conn,Operation **op,
int * connection_referenced);
int queue_pushed_back_data(Connection *conn);
static int add_to_select_set(Connection *conn);
static void inc_op_count(Connection* conn)
{
PR_AtomicIncrement(&conn->c_opscompleted);
slapi_counter_increment(ops_completed);
}
static int connection_increment_reference(Connection *conn)
{
int rc = 0;
PR_Lock( conn->c_mutex );
rc = connection_acquire_nolock (conn);
PR_Unlock( conn->c_mutex );
return rc;
}
static void connection_decrement_reference(Connection *conn)
{
PR_Lock( conn->c_mutex );
connection_release_nolock (conn);
PR_Unlock( conn->c_mutex );
}
static void
connection_threadmain()
{
/*
* OK, so this is the thread main routine for the thread pool.
* This is the general idea : wait on the i/o completion port.
* then get some data. There are three cases here:
* 1) This is the first piece of data read for a new LDAP op.
* 2) This is a subsequent, but not final, piece of data read in the current LDAP op on this connection
* 3) This is the last piece of the current LDAP op on the current connection.
* Note that these cases are NOT exclusive ! In particular, all three can occur for the same read.
* based on detecting these cases, we end up doing one or more of the following things:
* a) Create new structures for a new op.
* b) Read data into the BER buffer for the op.
* c) Press on to service the operation request (note that the results are currently written
* synchronously.
* We always queue a new read on the socket too.
* (Note, we need to make sure we don't issue the new read operation until we've copied
* the data from the existing one. Otherwise we'd open ourselves to getting OOO data.)
*
* The intention is that this code will be clean enough to be used for the UNIX build,
* once we fake up I/O completion ports with select and another thread.
*/
Connection *conn = NULL;
Operation *op = NULL;
int return_value = -1;
int abandon_connection = 0;
work_type command = 0;
int connection_referenced = 0;
/* Don't ask me, and I will tell you no lies */
#if defined( OSF1 ) || defined( hpux ) || defined( LINUX )
/* Arrange to ignore SIGPIPE signals. */
SIGNAL( SIGPIPE, SIG_IGN );
#endif
while (1) {
abandon_connection = 1; /* we start off assuming that we'll fail somewhere */
conn = NULL; /* just make sure we don't step on an old connection by mistake */
op = NULL; /* Same goes for the operation */
return_value = wait_on_new_work(&conn,&command);
if( op_shutdown )
break;
if (0 == return_value) {
connection_referenced = 0; /* No outstanding ref count on connection if wait for work returned OK */
switch (command) {
case read_data:
return_value = handle_read_data(conn,&op,&connection_referenced);
if (0 == return_value)
{
abandon_connection = 0;
}
break;
case write_data:
/* NYI, but we need to go and find the state for the connection, find the operation
* which queued the write, and then get whatever data we need to write, then write it ! */
break;
case new_connection:
/* NYI, but this would consist of the same stuff which is currently in daemon.c.
* On NT, we'd use AcceptEx() */
break;
default:
break;
}
finished_chomping(conn);
} else {
PR_SetError(PR_IO_ERROR, return_value);
connection_referenced = 1; /* There is an outstanding refcnt on the conn, so we get to close the right one ! */
}
/* If anything went wrong with the connection above, such that we need to
* disconnect it, we'll know here and shoot it in the foot.
*/
if ( (NULL != conn) && abandon_connection) {
disconnect_server(conn, conn->c_connid, op ? op->o_opid : -1, SLAPD_DISCONNECT_ABORT, 0 );
if (connection_referenced) {
connection_decrement_reference(conn);
}
}
}
g_decr_active_threadcnt();
}
static int handle_read_data(Connection *conn,Operation **op,
int * connection_referenced)
{
int return_value = 0;
int return_value2 = 0;
int process_op = 0; /* Do we or do we not process a complete operation now ? */
int defer_io = 0;
int defer_pushback = 0;
if (is_new_operation(conn)) {
return_value = connection_operation_new(conn,op);
} else {
*op = get_current_op(conn);
}
/* if connection is closing */
if (return_value != 0) {
LDAPDebug(LDAP_DEBUG_CONNS,
"handle_read_data returns as conn %" NSPRIu64 " closing, fd=%d\n",
conn->c_connid,conn->c_sd,0);
return return_value;
}
return_value = read_the_data(conn,&process_op, &defer_io, &defer_pushback);
if (0 == return_value) {
int replication_session = conn->c_isreplication_session;
if (0 != process_op)
return_value = process_operation(conn,*op);
/* Post any pending I/O operation _after_ processing any operation */
if (replication_session) {
/* Initiate any deferred I/O here */
if (defer_io) {
if (conn->c_flags & CONN_FLAG_SSL) {
add_to_select_set(conn);
return_value2 = 0;
} else {
return_value2 = issue_new_read(conn);
}
}
if (defer_pushback) {
return_value2 = queue_pushed_back_data(conn);
}
}
}
else
*connection_referenced = 1;
if (return_value) {
return return_value;
} else {
return return_value2;
}
}
/* Function which does the work involved in servicing an LDAP operation. */
static int process_operation(Connection *conn, Operation *op)
{
Slapi_PBlock *pb = NULL;
ber_len_t len;
ber_tag_t tag;
ber_int_t msgid;
int return_value = 0;
int destroy_content = 1;
pb = (Slapi_PBlock *) slapi_ch_calloc( 1, sizeof(Slapi_PBlock) );
pb->pb_conn = conn;
pb->pb_op = op;
/* destroy operation content when done */
slapi_pblock_set (pb, SLAPI_DESTROY_CONTENT, &destroy_content);
if (! config_check_referral_mode()) {
slapi_counter_increment(ops_initiated);
slapi_counter_increment(g_get_global_snmp_vars()->ops_tbl.dsInOps);
}
if ( (tag = ber_get_int( op->o_ber, &msgid ))
!= LDAP_TAG_MSGID ) {
/* log, close and send error */
LDAPDebug( LDAP_DEBUG_ANY,
"conn=%" NSPRIu64 " unable to read tag for incoming request\n", conn->c_connid, 0, 0 );
return_value = -1;
goto done;
}
op->o_msgid = msgid;
tag = ber_peek_tag( op->o_ber, &len );
switch ( tag ) {
case LBER_ERROR:
case LDAP_TAG_LDAPDN: /* optional username, for CLDAP */
/* log, close and send error */
LDAPDebug( LDAP_DEBUG_ANY,
"conn=%" NSPRIu64 " ber_peek_tag returns 0x%lx\n", conn->c_connid, tag, 0 );
return_value = -1;
goto done;
default:
break;
}
op->o_tag = tag;
/* are we in referral-only mode? */
if (config_check_referral_mode() && tag != LDAP_REQ_UNBIND)
{
referral_mode_reply(pb);
goto done;
}
/* check if new password is required */
if(connection_need_new_password(conn, op, pb))
{
goto done;
}
/* if this is a bulk import, only "add" and "import done (extop)" are
* allowed */
if (conn->c_flags & CONN_FLAG_IMPORT) {
if ((tag != LDAP_REQ_ADD) && (tag != LDAP_REQ_EXTENDED)) {
/* no cookie for you. */
LDAPDebug(LDAP_DEBUG_ANY, "Attempted operation %d from "
"within bulk import\n", tag, 0, 0);
slapi_send_ldap_result(pb, LDAP_PROTOCOL_ERROR, NULL, NULL,
0, NULL);
return_value = -1;
goto done;
}
}
/*
* Call the do_<operation> function to process this request.
*/
connection_dispatch_operation(conn, op, pb);
done:
/* If we're here, it means that we successfully completed an operation , so bump the counts */
inc_op_count(conn);
if ( !( pb->pb_op->o_flags & OP_FLAG_PS )) {
/*
* If not a persistent search, remove the operation
* from this connection's list.
*/
PR_Lock( conn->c_mutex );
connection_remove_operation( conn, op );
PR_Unlock( conn->c_mutex );
/* destroying the pblock will cause destruction of the operation
* so this must happen before releasing the connection
*/
slapi_pblock_destroy( pb );
PR_Lock( conn->c_mutex );
if (connection_release_nolock (conn) != 0)