1 /* $NetBSD: connection.c,v 1.3 2021/08/14 16:14:58 christos Exp $ */
2
3 /* $OpenLDAP$ */
4 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 *
6 * Copyright 1998-2021 The OpenLDAP Foundation.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted only as authorized by the OpenLDAP
11 * Public License.
12 *
13 * A copy of this license is available in the file LICENSE in the
14 * top-level directory of the distribution or, alternatively, at
15 * <http://www.OpenLDAP.org/license.html>.
16 */
17 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
18 * All rights reserved.
19 *
20 * Redistribution and use in source and binary forms are permitted
21 * provided that this notice is preserved and that due credit is given
22 * to the University of Michigan at Ann Arbor. The name of the University
23 * may not be used to endorse or promote products derived from this
24 * software without specific prior written permission. This software
25 * is provided ``as is'' without express or implied warranty.
26 */
27
28 #include <sys/cdefs.h>
29 __RCSID("$NetBSD: connection.c,v 1.3 2021/08/14 16:14:58 christos Exp $");
30
31 #include "portable.h"
32
33 #include <stdio.h>
34 #ifdef HAVE_LIMITS_H
35 #include <limits.h>
36 #endif
37
38 #include <ac/socket.h>
39 #include <ac/errno.h>
40 #include <ac/string.h>
41 #include <ac/time.h>
42 #include <ac/unistd.h>
43
44 #include "lutil.h"
45 #include "slap.h"
46
47 #ifdef LDAP_CONNECTIONLESS
48 #include "../../libraries/liblber/lber-int.h" /* ber_int_sb_read() */
49 #endif
50
51 #ifdef LDAP_SLAPI
52 #include "slapi/slapi.h"
53 #endif
54
55 static Connection *connections = NULL;
56
57 static ldap_pvt_thread_mutex_t conn_nextid_mutex;
58 static unsigned long conn_nextid = SLAPD_SYNC_SYNCCONN_OFFSET;
59
60 static const char conn_lost_str[] = "connection lost";
61
62 const char *
connection_state2str(int state)63 connection_state2str( int state )
64 {
65 switch( state ) {
66 case SLAP_C_INVALID: return "!";
67 case SLAP_C_INACTIVE: return "|";
68 case SLAP_C_CLOSING: return "C";
69 case SLAP_C_ACTIVE: return "";
70 case SLAP_C_BINDING: return "B";
71 case SLAP_C_CLIENT: return "L";
72 }
73
74 return "?";
75 }
76
77 static Connection* connection_get( ber_socket_t s );
78
79 typedef struct conn_readinfo {
80 Operation *op;
81 ldap_pvt_thread_start_t *func;
82 void *arg;
83 void *ctx;
84 int nullop;
85 } conn_readinfo;
86
87 static int connection_input( Connection *c, conn_readinfo *cri );
88 static void connection_close( Connection *c );
89
90 static int connection_op_activate( Operation *op );
91 static void connection_op_queue( Operation *op );
92 static int connection_resched( Connection *conn );
93 static void connection_abandon( Connection *conn );
94 static void connection_destroy( Connection *c );
95
96 static ldap_pvt_thread_start_t connection_operation;
97
98 /*
99 * Initialize connection management infrastructure.
100 */
connections_init(void)101 int connections_init(void)
102 {
103 int i;
104
105 assert( connections == NULL );
106
107 if( connections != NULL) {
108 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n" );
109 return -1;
110 }
111
112 /* should check return of every call */
113 ldap_pvt_thread_mutex_init( &conn_nextid_mutex );
114
115 connections = (Connection *) ch_calloc( dtblsize, sizeof(Connection) );
116
117 if( connections == NULL ) {
118 Debug( LDAP_DEBUG_ANY, "connections_init: "
119 "allocation (%d*%ld) of connection array failed\n",
120 dtblsize, (long) sizeof(Connection) );
121 return -1;
122 }
123
124 for (i=0; i<dtblsize; i++) {
125 connections[i].c_conn_idx = i;
126 ldap_pvt_thread_mutex_init( &connections[i].c_mutex );
127 ldap_pvt_thread_mutex_init( &connections[i].c_write1_mutex );
128 ldap_pvt_thread_cond_init( &connections[i].c_write1_cv );
129 }
130
131
132 /*
133 * per entry initialization of the Connection array initialization
134 * will be done by connection_init()
135 */
136
137 return 0;
138 }
139
140 /*
141 * Destroy connection management infrastructure.
142 */
143
connections_destroy(void)144 int connections_destroy(void)
145 {
146 ber_socket_t i;
147
148 /* should check return of every call */
149
150 if( connections == NULL) {
151 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n" );
152 return -1;
153 }
154
155 for ( i = 0; i < dtblsize; i++ ) {
156 ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
157 ldap_pvt_thread_mutex_destroy( &connections[i].c_write1_mutex );
158 ldap_pvt_thread_cond_destroy( &connections[i].c_write1_cv );
159 if( connections[i].c_sb ) {
160 ber_sockbuf_free( connections[i].c_sb );
161 #ifdef LDAP_SLAPI
162 if ( slapi_plugins_used ) {
163 slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION,
164 &connections[i] );
165 }
166 #endif
167 }
168 }
169
170 free( connections );
171 connections = NULL;
172
173 ldap_pvt_thread_mutex_destroy( &conn_nextid_mutex );
174 return 0;
175 }
176
177 /*
178 * shutdown all connections
179 */
connections_shutdown(void)180 int connections_shutdown(void)
181 {
182 ber_socket_t i;
183
184 for ( i = 0; i < dtblsize; i++ ) {
185 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
186 if( connections[i].c_conn_state > SLAP_C_INVALID ) {
187
188 /* give persistent clients a chance to cleanup */
189 if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
190 ldap_pvt_thread_pool_submit( &connection_pool,
191 connections[i].c_clientfunc, connections[i].c_clientarg );
192 } else {
193 /* c_mutex is locked */
194 connection_closing( &connections[i], "slapd shutdown" );
195 connection_close( &connections[i] );
196 }
197 }
198 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
199 }
200
201 return 0;
202 }
203
204 /*
205 * Timeout idle connections.
206 */
connections_timeout_idle(time_t now)207 int connections_timeout_idle(time_t now)
208 {
209 int i = 0;
210 ber_socket_t connindex;
211 Connection* c;
212
213 for( c = connection_first( &connindex );
214 c != NULL;
215 c = connection_next( c, &connindex ) )
216 {
217 /* Don't timeout a slow-running request or a persistent
218 * outbound connection.
219 */
220 if(( c->c_n_ops_executing && !c->c_writewaiter)
221 || c->c_conn_state == SLAP_C_CLIENT ) {
222 continue;
223 }
224
225 if( global_idletimeout &&
226 difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
227 /* close it */
228 connection_closing( c, "idletimeout" );
229 connection_close( c );
230 i++;
231 continue;
232 }
233 }
234 connection_done( c );
235
236 return i;
237 }
238
239 /* Drop all client connections */
connections_drop()240 void connections_drop()
241 {
242 Connection* c;
243 ber_socket_t connindex;
244
245 for( c = connection_first( &connindex );
246 c != NULL;
247 c = connection_next( c, &connindex ) )
248 {
249 /* Don't close a slow-running request or a persistent
250 * outbound connection.
251 */
252 if(( c->c_n_ops_executing && !c->c_writewaiter)
253 || c->c_conn_state == SLAP_C_CLIENT ) {
254 continue;
255 }
256 connection_closing( c, "dropping" );
257 connection_close( c );
258 }
259 connection_done( c );
260 }
261
connection_get(ber_socket_t s)262 static Connection* connection_get( ber_socket_t s )
263 {
264 Connection *c;
265
266 Debug( LDAP_DEBUG_ARGS,
267 "connection_get(%ld)\n",
268 (long) s );
269
270 assert( connections != NULL );
271
272 if(s == AC_SOCKET_INVALID) return NULL;
273
274 assert( s < dtblsize );
275 c = &connections[s];
276
277 if( c != NULL ) {
278 ldap_pvt_thread_mutex_lock( &c->c_mutex );
279
280 if( c->c_conn_state == SLAP_C_INVALID ) {
281 /* connection must have been closed due to resched */
282
283 Debug( LDAP_DEBUG_CONNS,
284 "connection_get(%d): connection not used\n",
285 s );
286 assert( c->c_sd == AC_SOCKET_INVALID );
287
288 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
289 return NULL;
290 }
291
292 Debug( LDAP_DEBUG_TRACE,
293 "connection_get(%d): got connid=%lu\n",
294 s, c->c_connid );
295
296 c->c_n_get++;
297
298 assert( c->c_conn_state != SLAP_C_INVALID );
299 assert( c->c_sd != AC_SOCKET_INVALID );
300
301 c->c_activitytime = slap_get_time();
302 }
303
304 return c;
305 }
306
connection_return(Connection * c)307 static void connection_return( Connection *c )
308 {
309 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
310 }
311
connection_init(ber_socket_t s,Listener * listener,const char * dnsname,const char * peername,int flags,slap_ssf_t ssf,struct berval * authid LDAP_PF_LOCAL_SENDMSG_ARG (struct berval * peerbv))312 Connection * connection_init(
313 ber_socket_t s,
314 Listener *listener,
315 const char* dnsname,
316 const char* peername,
317 int flags,
318 slap_ssf_t ssf,
319 struct berval *authid
320 LDAP_PF_LOCAL_SENDMSG_ARG(struct berval *peerbv))
321 {
322 unsigned long id;
323 Connection *c;
324 ber_socket_t sfd = SLAP_FD2SOCK(s);
325
326 assert( connections != NULL );
327
328 assert( listener != NULL );
329 assert( dnsname != NULL );
330 assert( peername != NULL );
331
332 #ifndef HAVE_TLS
333 assert( !( flags & CONN_IS_TLS ));
334 #endif
335
336 if( s == AC_SOCKET_INVALID ) {
337 Debug( LDAP_DEBUG_ANY,
338 "connection_init: init of socket %ld invalid.\n", (long)s );
339 return NULL;
340 }
341
342 assert( s >= 0 );
343 assert( s < dtblsize );
344 c = &connections[s];
345
346 ldap_pvt_thread_mutex_lock( &c->c_mutex );
347
348 if( !c->c_sb ) {
349 c->c_send_ldap_result = slap_send_ldap_result;
350 c->c_send_search_entry = slap_send_search_entry;
351 c->c_send_search_reference = slap_send_search_reference;
352 c->c_send_ldap_extended = slap_send_ldap_extended;
353 c->c_send_ldap_intermediate = slap_send_ldap_intermediate;
354
355 BER_BVZERO( &c->c_authmech );
356 BER_BVZERO( &c->c_dn );
357 BER_BVZERO( &c->c_ndn );
358
359 c->c_listener = NULL;
360 BER_BVZERO( &c->c_peer_domain );
361 BER_BVZERO( &c->c_peer_name );
362
363 LDAP_STAILQ_INIT(&c->c_ops);
364 LDAP_STAILQ_INIT(&c->c_pending_ops);
365
366 c->c_txn = CONN_TXN_INACTIVE;
367 c->c_txn_backend = NULL;
368 LDAP_STAILQ_INIT(&c->c_txn_ops);
369
370 BER_BVZERO( &c->c_sasl_bind_mech );
371 c->c_sasl_done = 0;
372 c->c_sasl_authctx = NULL;
373 c->c_sasl_sockctx = NULL;
374 c->c_sasl_extra = NULL;
375 c->c_sasl_bindop = NULL;
376 c->c_sasl_cbind = NULL;
377
378 c->c_sb = ber_sockbuf_alloc( );
379
380 {
381 ber_len_t max = sockbuf_max_incoming;
382 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
383 }
384
385 c->c_currentber = NULL;
386
387 #ifdef LDAP_SLAPI
388 if ( slapi_plugins_used ) {
389 slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
390 }
391 #endif
392 }
393
394 assert( BER_BVISNULL( &c->c_authmech ) );
395 assert( BER_BVISNULL( &c->c_dn ) );
396 assert( BER_BVISNULL( &c->c_ndn ) );
397 assert( c->c_listener == NULL );
398 assert( BER_BVISNULL( &c->c_peer_domain ) );
399 assert( BER_BVISNULL( &c->c_peer_name ) );
400 assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
401 assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
402 assert( c->c_txn == CONN_TXN_INACTIVE );
403 assert( c->c_txn_backend == NULL );
404 assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
405 assert( BER_BVISNULL( &c->c_sasl_bind_mech ) );
406 assert( c->c_sasl_done == 0 );
407 assert( c->c_sasl_authctx == NULL );
408 assert( c->c_sasl_sockctx == NULL );
409 assert( c->c_sasl_extra == NULL );
410 assert( c->c_sasl_bindop == NULL );
411 assert( c->c_sasl_cbind == NULL );
412 assert( c->c_currentber == NULL );
413 assert( c->c_writewaiter == 0);
414 assert( c->c_writers == 0);
415
416 c->c_listener = listener;
417 c->c_sd = s;
418
419 if ( flags & CONN_IS_CLIENT ) {
420 c->c_connid = 0;
421 c->c_conn_state = SLAP_C_CLIENT;
422 c->c_close_reason = "?"; /* should never be needed */
423 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &sfd );
424 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
425
426 return c;
427 }
428
429 ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
430 ber_str2bv( peername, 0, 1, &c->c_peer_name );
431
432 c->c_n_ops_received = 0;
433 c->c_n_ops_executing = 0;
434 c->c_n_ops_pending = 0;
435 c->c_n_ops_completed = 0;
436
437 c->c_n_get = 0;
438 c->c_n_read = 0;
439 c->c_n_write = 0;
440
441 /* set to zero until bind, implies LDAP_VERSION3 */
442 c->c_protocol = 0;
443
444 c->c_activitytime = c->c_starttime = slap_get_time();
445
446 #ifdef LDAP_CONNECTIONLESS
447 c->c_is_udp = 0;
448 if( flags & CONN_IS_UDP ) {
449 c->c_is_udp = 1;
450 #ifdef LDAP_DEBUG
451 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
452 LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
453 #endif
454 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
455 LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
456 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
457 LBER_SBIOD_LEVEL_PROVIDER, NULL );
458 } else
459 #endif /* LDAP_CONNECTIONLESS */
460 #ifdef LDAP_PF_LOCAL
461 if ( flags & CONN_IS_IPC ) {
462 #ifdef LDAP_DEBUG
463 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
464 LBER_SBIOD_LEVEL_PROVIDER, (void*)"ipc_" );
465 #endif
466 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_fd,
467 LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
468 #ifdef LDAP_PF_LOCAL_SENDMSG
469 if ( !BER_BVISEMPTY( peerbv ))
470 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_UNGET_BUF, peerbv );
471 #endif
472 } else
473 #endif /* LDAP_PF_LOCAL */
474 {
475 #ifdef LDAP_DEBUG
476 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
477 LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
478 #endif
479 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
480 LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
481 }
482
483 #ifdef LDAP_DEBUG
484 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
485 INT_MAX, (void*)"ldap_" );
486 #endif
487
488 if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
489 c /* non-NULL */ ) < 0 )
490 {
491 Debug( LDAP_DEBUG_ANY,
492 "connection_init(%d, %s): set nonblocking failed\n",
493 s, c->c_peer_name.bv_val );
494
495 c->c_listener = NULL;
496 if(c->c_peer_domain.bv_val != NULL) {
497 free(c->c_peer_domain.bv_val);
498 }
499 BER_BVZERO( &c->c_peer_domain );
500 if(c->c_peer_name.bv_val != NULL) {
501 free(c->c_peer_name.bv_val);
502 }
503 BER_BVZERO( &c->c_peer_name );
504
505 ber_sockbuf_free( c->c_sb );
506 c->c_sb = ber_sockbuf_alloc( );
507 {
508 ber_len_t max = sockbuf_max_incoming;
509 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
510 }
511
512 c->c_sd = AC_SOCKET_INVALID;
513 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
514
515 return NULL;
516 }
517
518 ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
519 id = c->c_connid = conn_nextid++;
520 ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
521
522 c->c_conn_state = SLAP_C_INACTIVE;
523 c->c_close_reason = "?"; /* should never be needed */
524
525 c->c_ssf = c->c_transport_ssf = ssf;
526 c->c_tls_ssf = c->c_sasl_ssf = 0;
527
528 #ifdef HAVE_TLS
529 if ( flags & CONN_IS_TLS ) {
530 c->c_is_tls = 1;
531 c->c_needs_tls_accept = 1;
532 } else {
533 c->c_is_tls = 0;
534 c->c_needs_tls_accept = 0;
535 }
536 #endif
537
538 slap_sasl_open( c, 0 );
539 slap_sasl_external( c, ssf, authid );
540
541 slapd_add_internal( s, 1 );
542
543 backend_connection_init(c);
544 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
545
546 if ( !(flags & CONN_IS_UDP ))
547 Debug( LDAP_DEBUG_STATS,
548 "conn=%ld fd=%ld ACCEPT from %s (%s)\n",
549 id, (long) s, peername, listener->sl_name.bv_val );
550
551 return c;
552 }
553
connection2anonymous(Connection * c)554 void connection2anonymous( Connection *c )
555 {
556 assert( connections != NULL );
557 assert( c != NULL );
558
559 {
560 ber_len_t max = sockbuf_max_incoming;
561 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
562 }
563
564 if ( !BER_BVISNULL( &c->c_authmech ) ) {
565 ch_free(c->c_authmech.bv_val);
566 }
567 BER_BVZERO( &c->c_authmech );
568
569 if ( !BER_BVISNULL( &c->c_dn ) ) {
570 ch_free(c->c_dn.bv_val);
571 }
572 BER_BVZERO( &c->c_dn );
573
574 if ( !BER_BVISNULL( &c->c_ndn ) ) {
575 ch_free(c->c_ndn.bv_val);
576 }
577 BER_BVZERO( &c->c_ndn );
578
579 if ( !BER_BVISNULL( &c->c_sasl_authz_dn ) ) {
580 ber_memfree_x( c->c_sasl_authz_dn.bv_val, NULL );
581 }
582 BER_BVZERO( &c->c_sasl_authz_dn );
583
584 c->c_authz_backend = NULL;
585 }
586
587 static void
connection_destroy(Connection * c)588 connection_destroy( Connection *c )
589 {
590 unsigned long connid;
591 const char *close_reason;
592 Sockbuf *sb;
593 ber_socket_t sd;
594
595 assert( connections != NULL );
596 assert( c != NULL );
597 assert( c->c_conn_state != SLAP_C_INVALID );
598 assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
599 assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
600 assert( c->c_txn == CONN_TXN_INACTIVE );
601 assert( c->c_txn_backend == NULL );
602 assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
603 assert( c->c_writewaiter == 0);
604 assert( c->c_writers == 0);
605
606 /* only for stats (print -1 as "%lu" may give unexpected results ;) */
607 connid = c->c_connid;
608 close_reason = c->c_close_reason;
609
610 backend_connection_destroy(c);
611
612 c->c_protocol = 0;
613 c->c_connid = -1;
614
615 c->c_activitytime = c->c_starttime = 0;
616
617 connection2anonymous( c );
618 c->c_listener = NULL;
619
620 if(c->c_peer_domain.bv_val != NULL) {
621 free(c->c_peer_domain.bv_val);
622 }
623 BER_BVZERO( &c->c_peer_domain );
624 if(c->c_peer_name.bv_val != NULL) {
625 free(c->c_peer_name.bv_val);
626 }
627 BER_BVZERO( &c->c_peer_name );
628
629 c->c_sasl_bind_in_progress = 0;
630 if(c->c_sasl_bind_mech.bv_val != NULL) {
631 free(c->c_sasl_bind_mech.bv_val);
632 }
633 BER_BVZERO( &c->c_sasl_bind_mech );
634
635 slap_sasl_close( c );
636
637 if ( c->c_currentber != NULL ) {
638 ber_free( c->c_currentber, 1 );
639 c->c_currentber = NULL;
640 }
641
642
643 #ifdef LDAP_SLAPI
644 /* call destructors, then constructors; avoids unnecessary allocation */
645 if ( slapi_plugins_used ) {
646 slapi_int_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
647 }
648 #endif
649
650 sd = c->c_sd;
651 c->c_sd = AC_SOCKET_INVALID;
652 c->c_close_reason = "?"; /* should never be needed */
653
654 sb = c->c_sb;
655 c->c_sb = ber_sockbuf_alloc( );
656 {
657 ber_len_t max = sockbuf_max_incoming;
658 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
659 }
660 c->c_conn_state = SLAP_C_INVALID;
661
662 /* c must be fully reset by this point; when we call slapd_remove
663 * it may get immediately reused by a new connection.
664 */
665 if ( sd != AC_SOCKET_INVALID ) {
666 slapd_remove( sd, sb, 1, 0, 0 );
667
668 if ( close_reason == NULL ) {
669 Debug( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed\n",
670 connid, (long) sd );
671 } else {
672 Debug( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed (%s)\n",
673 connid, (long) sd, close_reason );
674 }
675 }
676 }
677
connection_is_active(ber_socket_t s)678 int connection_is_active( ber_socket_t s )
679 {
680 Connection *c;
681
682 assert( s < dtblsize );
683 c = &connections[s];
684 return c->c_conn_state == SLAP_C_CLOSING ||
685 c->c_conn_state == SLAP_C_BINDING ||
686 c->c_conn_state == SLAP_C_ACTIVE ;
687 }
688
connection_valid(Connection * c)689 int connection_valid( Connection *c )
690 {
691 /* c_mutex must be locked by caller */
692
693 assert( c != NULL );
694
695 return c->c_conn_state >= SLAP_C_ACTIVE &&
696 c->c_conn_state <= SLAP_C_CLIENT;
697 }
698
connection_abandon(Connection * c)699 static void connection_abandon( Connection *c )
700 {
701 /* c_mutex must be locked by caller */
702
703 Operation *o, *next, op = {0};
704 Opheader ohdr = {0};
705
706 op.o_hdr = &ohdr;
707 op.o_conn = c;
708 op.o_connid = c->c_connid;
709 op.o_tag = LDAP_REQ_ABANDON;
710
711 for ( o = LDAP_STAILQ_FIRST( &c->c_ops ); o; o=next ) {
712 SlapReply rs = {REP_RESULT};
713
714 next = LDAP_STAILQ_NEXT( o, o_next );
715 /* don't abandon an op twice */
716 if ( o->o_abandon )
717 continue;
718 op.orn_msgid = o->o_msgid;
719 o->o_abandon = 1;
720 op.o_bd = frontendDB;
721 frontendDB->be_abandon( &op, &rs );
722 }
723
724 /* remove operations in pending transaction */
725 while ( (o = LDAP_STAILQ_FIRST( &c->c_txn_ops )) != NULL) {
726 LDAP_STAILQ_REMOVE_HEAD( &c->c_txn_ops, o_next );
727 LDAP_STAILQ_NEXT(o, o_next) = NULL;
728 slap_op_free( o, NULL );
729 }
730
731 /* clear transaction */
732 c->c_txn_backend = NULL;
733 c->c_txn = CONN_TXN_INACTIVE;
734
735 /* remove pending operations */
736 while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
737 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
738 LDAP_STAILQ_NEXT(o, o_next) = NULL;
739 slap_op_free( o, NULL );
740 }
741 }
742
743 static void
connection_wake_writers(Connection * c)744 connection_wake_writers( Connection *c )
745 {
746 /* wake write blocked operations */
747 ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
748 if ( c->c_writers > 0 ) {
749 c->c_writers = -c->c_writers;
750 ldap_pvt_thread_cond_broadcast( &c->c_write1_cv );
751 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
752 if ( c->c_writewaiter ) {
753 slapd_shutsock( c->c_sd );
754 }
755 ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
756 while ( c->c_writers ) {
757 ldap_pvt_thread_cond_wait( &c->c_write1_cv, &c->c_write1_mutex );
758 }
759 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
760 } else {
761 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
762 slapd_clr_write( c->c_sd, 1 );
763 }
764 }
765
connection_closing(Connection * c,const char * why)766 void connection_closing( Connection *c, const char *why )
767 {
768 assert( connections != NULL );
769 assert( c != NULL );
770
771 if( c->c_conn_state == SLAP_C_INVALID )
772 return;
773
774 /* c_mutex must be locked by caller */
775
776 if( c->c_conn_state != SLAP_C_CLOSING ) {
777 Debug( LDAP_DEBUG_CONNS,
778 "connection_closing: readying conn=%lu sd=%d for close\n",
779 c->c_connid, c->c_sd );
780 /* update state to closing */
781 c->c_conn_state = SLAP_C_CLOSING;
782 c->c_close_reason = why;
783
784 /* don't listen on this port anymore */
785 slapd_clr_read( c->c_sd, 0 );
786
787 /* abandon active operations */
788 connection_abandon( c );
789
790 /* wake write blocked operations */
791 connection_wake_writers( c );
792
793 } else if( why == NULL && c->c_close_reason == conn_lost_str ) {
794 /* Client closed connection after doing Unbind. */
795 c->c_close_reason = NULL;
796 }
797 }
798
799 static void
connection_close(Connection * c)800 connection_close( Connection *c )
801 {
802 assert( connections != NULL );
803 assert( c != NULL );
804
805 if ( c->c_conn_state != SLAP_C_CLOSING )
806 return;
807
808 /* NOTE: c_mutex should be locked by caller */
809
810 if ( !LDAP_STAILQ_EMPTY(&c->c_ops) ||
811 !LDAP_STAILQ_EMPTY(&c->c_pending_ops) )
812 {
813 Debug( LDAP_DEBUG_CONNS,
814 "connection_close: deferring conn=%lu sd=%d\n",
815 c->c_connid, c->c_sd );
816 return;
817 }
818
819 Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
820 c->c_connid, c->c_sd );
821
822 connection_destroy( c );
823 }
824
connections_nextid(void)825 unsigned long connections_nextid(void)
826 {
827 unsigned long id;
828 assert( connections != NULL );
829
830 ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
831
832 id = conn_nextid;
833
834 ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
835
836 return id;
837 }
838
839 /*
840 * Loop through the connections:
841 *
842 * for (c = connection_first(&i); c; c = connection_next(c, &i)) ...;
843 * connection_done(c);
844 *
845 * 'i' is the cursor, initialized by connection_first().
846 * 'c_mutex' is locked in the returned connection. The functions must
847 * be passed the previous return value so they can unlock it again.
848 */
849
connection_first(ber_socket_t * index)850 Connection* connection_first( ber_socket_t *index )
851 {
852 assert( connections != NULL );
853 assert( index != NULL );
854
855 for( *index = 0; *index < dtblsize; (*index)++) {
856 if( connections[*index].c_sb ) {
857 break;
858 }
859 }
860
861 return connection_next(NULL, index);
862 }
863
864 /* Next connection in loop, see connection_first() */
connection_next(Connection * c,ber_socket_t * index)865 Connection* connection_next( Connection *c, ber_socket_t *index )
866 {
867 assert( connections != NULL );
868 assert( index != NULL );
869 assert( *index <= dtblsize );
870
871 if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
872
873 c = NULL;
874
875 for(; *index < dtblsize; (*index)++) {
876 if( connections[*index].c_sb ) {
877 c = &connections[(*index)++];
878 ldap_pvt_thread_mutex_lock( &c->c_mutex );
879 if ( c->c_conn_state == SLAP_C_INVALID ) {
880 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
881 c = NULL;
882 continue;
883 }
884 break;
885 }
886 }
887
888 return c;
889 }
890
891 /* End connection loop, see connection_first() */
connection_done(Connection * c)892 void connection_done( Connection *c )
893 {
894 assert( connections != NULL );
895
896 if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
897 }
898
899 /*
900 * connection_activity - handle the request operation op on connection
901 * conn. This routine figures out what kind of operation it is and
902 * calls the appropriate stub to handle it.
903 */
904
905 /* FIXME: returns 0 in case of failure */
906 #define INCR_OP_INITIATED(index) \
907 do { \
908 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
909 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated_[(index)], 1); \
910 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
911 } while (0)
912 #define INCR_OP_COMPLETED(index) \
913 do { \
914 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
915 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
916 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed_[(index)], 1); \
917 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
918 } while (0)
919
920 /*
921 * NOTE: keep in sync with enum in slapd.h
922 */
923 static BI_op_func *opfun[] = {
924 do_bind,
925 do_unbind,
926 do_search,
927 do_compare,
928 do_modify,
929 do_modrdn,
930 do_add,
931 do_delete,
932 do_abandon,
933 do_extended,
934 NULL
935 };
936
937 /* Counters are per-thread, not per-connection.
938 */
939 static void
conn_counter_destroy(void * key,void * data)940 conn_counter_destroy( void *key, void *data )
941 {
942 slap_counters_t **prev, *sc;
943
944 ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
945 for ( prev = &slap_counters.sc_next, sc = slap_counters.sc_next; sc;
946 prev = &sc->sc_next, sc = sc->sc_next ) {
947 if ( sc == data ) {
948 int i;
949
950 *prev = sc->sc_next;
951 /* Copy data to main counter */
952 ldap_pvt_mp_add( slap_counters.sc_bytes, sc->sc_bytes );
953 ldap_pvt_mp_add( slap_counters.sc_pdu, sc->sc_pdu );
954 ldap_pvt_mp_add( slap_counters.sc_entries, sc->sc_entries );
955 ldap_pvt_mp_add( slap_counters.sc_refs, sc->sc_refs );
956 ldap_pvt_mp_add( slap_counters.sc_ops_initiated, sc->sc_ops_initiated );
957 ldap_pvt_mp_add( slap_counters.sc_ops_completed, sc->sc_ops_completed );
958 for ( i = 0; i < SLAP_OP_LAST; i++ ) {
959 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_initiated_[ i ] );
960 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_completed_[ i ] );
961 }
962 slap_counters_destroy( sc );
963 ber_memfree_x( data, NULL );
964 break;
965 }
966 }
967 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
968 }
969
970 static void
conn_counter_init(Operation * op,void * ctx)971 conn_counter_init( Operation *op, void *ctx )
972 {
973 slap_counters_t *sc;
974 void *vsc = NULL;
975
976 if ( ldap_pvt_thread_pool_getkey(
977 ctx, (void *)conn_counter_init, &vsc, NULL ) || !vsc ) {
978 vsc = ch_malloc( sizeof( slap_counters_t ));
979 sc = vsc;
980 slap_counters_init( sc );
981 ldap_pvt_thread_pool_setkey( ctx, (void*)conn_counter_init, vsc,
982 conn_counter_destroy, NULL, NULL );
983
984 ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
985 sc->sc_next = slap_counters.sc_next;
986 slap_counters.sc_next = sc;
987 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
988 }
989 op->o_counters = vsc;
990 }
991
992 void
connection_op_finish(Operation * op)993 connection_op_finish( Operation *op )
994 {
995 Connection *conn = op->o_conn;
996 void *memctx_null = NULL;
997 slap_op_t opidx = slap_req2op( op->o_tag );
998 assert( opidx != SLAP_OP_LAST );
999
1000 INCR_OP_COMPLETED( opidx );
1001
1002 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1003
1004 if ( op->o_tag == LDAP_REQ_BIND && conn->c_conn_state == SLAP_C_BINDING )
1005 conn->c_conn_state = SLAP_C_ACTIVE;
1006
1007 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
1008
1009 LDAP_STAILQ_REMOVE( &conn->c_ops, op, Operation, o_next);
1010 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1011 conn->c_n_ops_executing--;
1012 conn->c_n_ops_completed++;
1013 connection_resched( conn );
1014 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1015 }
1016
1017 static void *
connection_operation(void * ctx,void * arg_v)1018 connection_operation( void *ctx, void *arg_v )
1019 {
1020 int rc = LDAP_OTHER, cancel;
1021 Operation *op = arg_v;
1022 SlapReply rs = {REP_RESULT};
1023 ber_tag_t tag = op->o_tag;
1024 slap_op_t opidx = SLAP_OP_LAST;
1025 Connection *conn = op->o_conn;
1026 void *memctx = NULL;
1027 void *memctx_null = NULL;
1028 ber_len_t memsiz;
1029
1030 gettimeofday( &op->o_qtime, NULL );
1031 op->o_qtime.tv_usec -= op->o_tusec;
1032 if ( op->o_qtime.tv_usec < 0 ) {
1033 op->o_qtime.tv_usec += 1000000;
1034 op->o_qtime.tv_sec--;
1035 }
1036 op->o_qtime.tv_sec -= op->o_time;
1037 conn_counter_init( op, ctx );
1038 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex );
1039 /* FIXME: returns 0 in case of failure */
1040 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated, 1);
1041 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex );
1042
1043 op->o_threadctx = ctx;
1044 op->o_tid = ldap_pvt_thread_pool_tid( ctx );
1045
1046 switch ( tag ) {
1047 case LDAP_REQ_BIND:
1048 case LDAP_REQ_UNBIND:
1049 case LDAP_REQ_ADD:
1050 case LDAP_REQ_DELETE:
1051 case LDAP_REQ_MODDN:
1052 case LDAP_REQ_MODIFY:
1053 case LDAP_REQ_COMPARE:
1054 case LDAP_REQ_SEARCH:
1055 case LDAP_REQ_ABANDON:
1056 case LDAP_REQ_EXTENDED:
1057 break;
1058 default:
1059 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1060 "conn %lu unknown LDAP request 0x%lx\n",
1061 conn->c_connid, tag );
1062 op->o_tag = LBER_ERROR;
1063 rs.sr_err = LDAP_PROTOCOL_ERROR;
1064 rs.sr_text = "unknown LDAP request";
1065 send_ldap_disconnect( op, &rs );
1066 rc = SLAPD_DISCONNECT;
1067 goto operations_error;
1068 }
1069
1070 if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
1071 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1072 "error: SASL bind in progress (tag=%ld).\n",
1073 (long) tag );
1074 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
1075 "SASL bind in progress" );
1076 rc = LDAP_OPERATIONS_ERROR;
1077 goto operations_error;
1078 }
1079
1080 if (( conn->c_txn == CONN_TXN_SPECIFY ) && (
1081 ( tag == LDAP_REQ_ADD ) ||
1082 ( tag == LDAP_REQ_DELETE ) ||
1083 ( tag == LDAP_REQ_MODIFY ) ||
1084 ( tag == LDAP_REQ_MODRDN )))
1085 {
1086 /* Disable SLAB allocator for all update operations
1087 issued inside of a transaction */
1088 op->o_tmpmemctx = NULL;
1089 op->o_tmpmfuncs = &ch_mfuncs;
1090 } else {
1091 /* We can use Thread-Local storage for most mallocs. We can
1092 * also use TL for ber parsing, but not on Add or Modify.
1093 */
1094 #if 0
1095 memsiz = ber_len( op->o_ber ) * 64;
1096 if ( SLAP_SLAB_SIZE > memsiz ) memsiz = SLAP_SLAB_SIZE;
1097 #endif
1098 memsiz = SLAP_SLAB_SIZE;
1099
1100 memctx = slap_sl_mem_create( memsiz, SLAP_SLAB_STACK, ctx, 1 );
1101 op->o_tmpmemctx = memctx;
1102 op->o_tmpmfuncs = &slap_sl_mfuncs;
1103 if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
1104 /* Note - the ber and its buffer are already allocated from
1105 * regular memory; this only affects subsequent mallocs that
1106 * ber_scanf may invoke.
1107 */
1108 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
1109 }
1110 }
1111
1112 opidx = slap_req2op( tag );
1113 assert( opidx != SLAP_OP_LAST );
1114 INCR_OP_INITIATED( opidx );
1115 rc = (*(opfun[opidx]))( op, &rs );
1116
1117 operations_error:
1118 if ( rc == SLAPD_DISCONNECT ) {
1119 tag = LBER_ERROR;
1120
1121 } else if ( rc == SLAPD_ASYNCOP ) {
1122 /* someone has claimed ownership of the op
1123 * to complete it later. Don't do anything
1124 * else with it now. Detach memctx too.
1125 */
1126 slap_sl_mem_setctx( ctx, NULL );
1127 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1128 connection_resched( conn );
1129 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1130 return NULL;
1131
1132 } else if ( opidx != SLAP_OP_LAST ) {
1133 /* increment completed operations count
1134 * only if operation was initiated
1135 * and rc != SLAPD_DISCONNECT */
1136 INCR_OP_COMPLETED( opidx );
1137 }
1138
1139 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1140
1141 if ( opidx == SLAP_OP_BIND && conn->c_conn_state == SLAP_C_BINDING )
1142 conn->c_conn_state = SLAP_C_ACTIVE;
1143
1144 cancel = op->o_cancel;
1145 if ( cancel != SLAP_CANCEL_NONE && cancel != SLAP_CANCEL_DONE ) {
1146 if ( cancel == SLAP_CANCEL_REQ ) {
1147 op->o_cancel = rc == SLAPD_ABANDON
1148 ? SLAP_CANCEL_ACK : LDAP_TOO_LATE;
1149 }
1150
1151 do {
1152 /* Fake a cond_wait with thread_yield, then
1153 * verify the result properly mutex-protected.
1154 */
1155 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1156 do {
1157 ldap_pvt_thread_yield();
1158 } while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
1159 && cancel != SLAP_CANCEL_DONE );
1160 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1161 } while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
1162 && cancel != SLAP_CANCEL_DONE );
1163 }
1164
1165 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
1166
1167 if ( rc != LDAP_TXN_SPECIFY_OKAY ) {
1168 LDAP_STAILQ_REMOVE( &conn->c_ops, op, Operation, o_next);
1169 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1170 }
1171 conn->c_n_ops_executing--;
1172 conn->c_n_ops_completed++;
1173
1174 switch( tag ) {
1175 case LBER_ERROR:
1176 case LDAP_REQ_UNBIND:
1177 /* c_mutex is locked */
1178 connection_closing( conn,
1179 tag == LDAP_REQ_UNBIND ? NULL : "operations error" );
1180 break;
1181 }
1182
1183 connection_resched( conn );
1184 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1185 if ( rc != LDAP_TXN_SPECIFY_OKAY ) {
1186 slap_op_free( op, ctx );
1187 }
1188 return NULL;
1189 }
1190
1191 static const Listener dummy_list = { BER_BVC(""), BER_BVC("") };
1192
connection_client_setup(ber_socket_t s,ldap_pvt_thread_start_t * func,void * arg)1193 Connection *connection_client_setup(
1194 ber_socket_t s,
1195 ldap_pvt_thread_start_t *func,
1196 void *arg )
1197 {
1198 Connection *c;
1199 ber_socket_t sfd = SLAP_SOCKNEW( s );
1200
1201 c = connection_init( sfd, (Listener *)&dummy_list, "", "",
1202 CONN_IS_CLIENT, 0, NULL
1203 LDAP_PF_LOCAL_SENDMSG_ARG(NULL));
1204 if ( c ) {
1205 c->c_clientfunc = func;
1206 c->c_clientarg = arg;
1207
1208 slapd_add_internal( sfd, 0 );
1209 }
1210 return c;
1211 }
1212
connection_client_enable(Connection * c)1213 void connection_client_enable(
1214 Connection *c )
1215 {
1216 slapd_set_read( c->c_sd, 1 );
1217 }
1218
connection_client_stop(Connection * c)1219 void connection_client_stop(
1220 Connection *c )
1221 {
1222 Sockbuf *sb;
1223 ber_socket_t s = c->c_sd;
1224
1225 /* get (locked) connection */
1226 c = connection_get( s );
1227
1228 assert( c->c_conn_state == SLAP_C_CLIENT );
1229
1230 c->c_listener = NULL;
1231 c->c_sd = AC_SOCKET_INVALID;
1232 c->c_close_reason = "?"; /* should never be needed */
1233 sb = c->c_sb;
1234 c->c_sb = ber_sockbuf_alloc( );
1235 {
1236 ber_len_t max = sockbuf_max_incoming;
1237 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
1238 }
1239 c->c_conn_state = SLAP_C_INVALID;
1240 slapd_remove( s, sb, 0, 1, 0 );
1241
1242 connection_return( c );
1243 }
1244
1245 static int connection_read( ber_socket_t s, conn_readinfo *cri );
1246
connection_read_thread(void * ctx,void * argv)1247 static void* connection_read_thread( void* ctx, void* argv )
1248 {
1249 int rc ;
1250 conn_readinfo cri = { NULL, NULL, NULL, NULL, 0 };
1251 ber_socket_t s = (long)argv;
1252
1253 /*
1254 * read incoming LDAP requests. If there is more than one,
1255 * the first one is returned with new_op
1256 */
1257 cri.ctx = ctx;
1258 if( ( rc = connection_read( s, &cri ) ) < 0 ) {
1259 Debug( LDAP_DEBUG_CONNS, "connection_read(%d) error\n", s );
1260 return (void*)(long)rc;
1261 }
1262
1263 /* execute a single queued request in the same thread */
1264 if( cri.op && !cri.nullop ) {
1265 rc = (long)connection_operation( ctx, cri.op );
1266 } else if ( cri.func ) {
1267 rc = (long)cri.func( ctx, cri.arg );
1268 }
1269
1270 return (void*)(long)rc;
1271 }
1272
connection_read_activate(ber_socket_t s)1273 int connection_read_activate( ber_socket_t s )
1274 {
1275 int rc;
1276
1277 /*
1278 * suspend reading on this file descriptor until a connection processing
1279 * thread reads data on it. Otherwise the listener thread will repeatedly
1280 * submit the same event on it to the pool.
1281 */
1282 rc = slapd_clr_read( s, 0 );
1283 if ( rc )
1284 return rc;
1285
1286 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1287 connection_read_thread, (void *)(long)s );
1288
1289 if( rc != 0 ) {
1290 Debug( LDAP_DEBUG_ANY,
1291 "connection_read_activate(%d): submit failed (%d)\n",
1292 s, rc );
1293 }
1294
1295 return rc;
1296 }
1297
1298 static int
connection_read(ber_socket_t s,conn_readinfo * cri)1299 connection_read( ber_socket_t s, conn_readinfo *cri )
1300 {
1301 int rc = 0;
1302 Connection *c;
1303
1304 assert( connections != NULL );
1305
1306 /* get (locked) connection */
1307 c = connection_get( s );
1308
1309 if( c == NULL ) {
1310 Debug( LDAP_DEBUG_ANY,
1311 "connection_read(%ld): no connection!\n",
1312 (long) s );
1313
1314 return -1;
1315 }
1316
1317 c->c_n_read++;
1318
1319 if( c->c_conn_state == SLAP_C_CLOSING ) {
1320 Debug( LDAP_DEBUG_CONNS,
1321 "connection_read(%d): closing, ignoring input for id=%lu\n",
1322 s, c->c_connid );
1323 connection_return( c );
1324 return 0;
1325 }
1326
1327 if ( c->c_conn_state == SLAP_C_CLIENT ) {
1328 cri->func = c->c_clientfunc;
1329 cri->arg = c->c_clientarg;
1330 /* read should already be cleared */
1331 connection_return( c );
1332 return 0;
1333 }
1334
1335 Debug( LDAP_DEBUG_TRACE,
1336 "connection_read(%d): checking for input on id=%lu\n",
1337 s, c->c_connid );
1338
1339 #ifdef HAVE_TLS
1340 if ( c->c_is_tls && c->c_needs_tls_accept ) {
1341 rc = ldap_pvt_tls_accept( c->c_sb, slap_tls_ctx );
1342 if ( rc < 0 ) {
1343 Debug( LDAP_DEBUG_TRACE,
1344 "connection_read(%d): TLS accept failure "
1345 "error=%d id=%lu, closing\n",
1346 s, rc, c->c_connid );
1347
1348 c->c_needs_tls_accept = 0;
1349 /* c_mutex is locked */
1350 connection_closing( c, "TLS negotiation failure" );
1351 connection_close( c );
1352 connection_return( c );
1353 return 0;
1354
1355 } else if ( rc == 0 ) {
1356 void *ssl;
1357 struct berval authid = BER_BVNULL;
1358 char msgbuf[32];
1359
1360 c->c_needs_tls_accept = 0;
1361
1362 /* we need to let SASL know */
1363 ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1364
1365 c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1366 if( c->c_tls_ssf > c->c_ssf ) {
1367 c->c_ssf = c->c_tls_ssf;
1368 }
1369
1370 rc = dnX509peerNormalize( ssl, &authid );
1371 if ( rc != LDAP_SUCCESS ) {
1372 Debug( LDAP_DEBUG_TRACE, "connection_read(%d): "
1373 "unable to get TLS client DN, error=%d id=%lu\n",
1374 s, rc, c->c_connid );
1375 }
1376 sprintf(msgbuf, "tls_ssf=%u ssf=%u", c->c_tls_ssf, c->c_ssf);
1377 Debug( LDAP_DEBUG_STATS,
1378 "conn=%lu fd=%d TLS established %s tls_proto=%s tls_cipher=%s\n",
1379 c->c_connid, (int) s,
1380 msgbuf, ldap_pvt_tls_get_version( ssl ), ldap_pvt_tls_get_cipher( ssl ));
1381 slap_sasl_external( c, c->c_tls_ssf, &authid );
1382 if ( authid.bv_val ) free( authid.bv_val );
1383
1384 slap_sasl_cbinding( c, ssl );
1385
1386 } else if ( rc == 1 && ber_sockbuf_ctrl( c->c_sb,
1387 LBER_SB_OPT_NEEDS_WRITE, NULL )) { /* need to retry */
1388 slapd_set_write( s, 1 );
1389 connection_return( c );
1390 return 0;
1391 }
1392
1393 /* if success and data is ready, fall thru to data input loop */
1394 if( !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1395 {
1396 slapd_set_read( s, 1 );
1397 connection_return( c );
1398 return 0;
1399 }
1400 }
1401 #endif
1402
1403 #ifdef HAVE_CYRUS_SASL
1404 if ( c->c_sasl_layers ) {
1405 /* If previous layer is not removed yet, give up for now */
1406 if ( !c->c_sasl_sockctx ) {
1407 slapd_set_read( s, 1 );
1408 connection_return( c );
1409 return 0;
1410 }
1411
1412 c->c_sasl_layers = 0;
1413
1414 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_sockctx );
1415 if( rc != LDAP_SUCCESS ) {
1416 Debug( LDAP_DEBUG_TRACE,
1417 "connection_read(%d): SASL install error "
1418 "error=%d id=%lu, closing\n",
1419 s, rc, c->c_connid );
1420
1421 /* c_mutex is locked */
1422 connection_closing( c, "SASL layer install failure" );
1423 connection_close( c );
1424 connection_return( c );
1425 return 0;
1426 }
1427 }
1428 #endif
1429
1430 #define CONNECTION_INPUT_LOOP 1
1431 /* #define DATA_READY_LOOP 1 */
1432
1433 do {
1434 /* How do we do this without getting into a busy loop ? */
1435 rc = connection_input( c, cri );
1436 }
1437 #ifdef DATA_READY_LOOP
1438 while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
1439 #elif defined CONNECTION_INPUT_LOOP
1440 while(!rc);
1441 #else
1442 while(0);
1443 #endif
1444
1445 if( rc < 0 ) {
1446 Debug( LDAP_DEBUG_CONNS,
1447 "connection_read(%d): input error=%d id=%lu, closing.\n",
1448 s, rc, c->c_connid );
1449
1450 /* c_mutex is locked */
1451 connection_closing( c, conn_lost_str );
1452 connection_close( c );
1453 connection_return( c );
1454 return 0;
1455 }
1456
1457 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1458 slapd_set_write( s, 0 );
1459 }
1460
1461 slapd_set_read( s, 1 );
1462 connection_return( c );
1463
1464 return 0;
1465 }
1466
1467 static int
connection_input(Connection * conn,conn_readinfo * cri)1468 connection_input( Connection *conn , conn_readinfo *cri )
1469 {
1470 Operation *op;
1471 ber_tag_t tag;
1472 ber_len_t len;
1473 ber_int_t msgid;
1474 BerElement *ber;
1475 int rc;
1476 #ifdef LDAP_CONNECTIONLESS
1477 Sockaddr peeraddr;
1478 char *cdn = NULL;
1479 #endif
1480 char *defer = NULL;
1481 void *ctx;
1482
1483 if ( conn->c_currentber == NULL &&
1484 ( conn->c_currentber = ber_alloc()) == NULL )
1485 {
1486 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n" );
1487 return -1;
1488 }
1489
1490 sock_errset(0);
1491
1492 #ifdef LDAP_CONNECTIONLESS
1493 if ( conn->c_is_udp ) {
1494 #if defined(LDAP_PF_INET6)
1495 char peername[sizeof("IP=[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]:65535")];
1496 char addr[INET6_ADDRSTRLEN];
1497 #else
1498 char peername[sizeof("IP=255.255.255.255:65336")];
1499 char addr[INET_ADDRSTRLEN];
1500 #endif
1501 const char *peeraddr_string = NULL;
1502
1503 len = ber_int_sb_read(conn->c_sb, &peeraddr, sizeof(Sockaddr));
1504 if (len != sizeof(Sockaddr)) return 1;
1505
1506 #if defined(LDAP_PF_INET6)
1507 if (peeraddr.sa_addr.sa_family == AF_INET6) {
1508 if ( IN6_IS_ADDR_V4MAPPED(&peeraddr.sa_in6_addr.sin6_addr) ) {
1509 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1510 peeraddr_string = inet_ntop( AF_INET,
1511 ((struct in_addr *)&peeraddr.sa_in6_addr.sin6_addr.s6_addr[12]),
1512 addr, sizeof(addr) );
1513 #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1514 peeraddr_string = inet_ntoa( *((struct in_addr *)
1515 &peeraddr.sa_in6_addr.sin6_addr.s6_addr[12]) );
1516 #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1517 if ( !peeraddr_string ) peeraddr_string = SLAP_STRING_UNKNOWN;
1518 sprintf( peername, "IP=%s:%d", peeraddr_string,
1519 (unsigned) ntohs( peeraddr.sa_in6_addr.sin6_port ) );
1520 } else {
1521 peeraddr_string = inet_ntop( AF_INET6,
1522 &peeraddr.sa_in6_addr.sin6_addr,
1523 addr, sizeof addr );
1524 if ( !peeraddr_string ) peeraddr_string = SLAP_STRING_UNKNOWN;
1525 sprintf( peername, "IP=[%s]:%d", peeraddr_string,
1526 (unsigned) ntohs( peeraddr.sa_in6_addr.sin6_port ) );
1527 }
1528 } else
1529 #endif
1530 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1531 {
1532 peeraddr_string = inet_ntop( AF_INET, &peeraddr.sa_in_addr.sin_addr,
1533 addr, sizeof(addr) );
1534 #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1535 peeraddr_string = inet_ntoa( peeraddr.sa_in_addr.sin_addr );
1536 #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1537 sprintf( peername, "IP=%s:%d",
1538 peeraddr_string,
1539 (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1540 }
1541 Debug( LDAP_DEBUG_STATS,
1542 "conn=%lu UDP request from %s (%s) accepted.\n",
1543 conn->c_connid, peername, conn->c_sock_name.bv_val );
1544 }
1545 #endif
1546
1547 tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1548 if ( tag != LDAP_TAG_MESSAGE ) {
1549 int err = sock_errno();
1550
1551 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1552 char ebuf[128];
1553 /* log, close and send error */
1554 Debug( LDAP_DEBUG_TRACE,
1555 "ber_get_next on fd %d failed errno=%d (%s)\n",
1556 conn->c_sd, err, sock_errstr(err, ebuf, sizeof(ebuf)) );
1557 ber_free( conn->c_currentber, 1 );
1558 conn->c_currentber = NULL;
1559
1560 return -2;
1561 }
1562 return 1;
1563 }
1564
1565 ber = conn->c_currentber;
1566 conn->c_currentber = NULL;
1567
1568 if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1569 /* log, close and send error */
1570 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag );
1571 ber_free( ber, 1 );
1572 return -1;
1573 }
1574
1575 if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1576 /* log, close and send error */
1577 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag );
1578 ber_free( ber, 1 );
1579
1580 return -1;
1581 }
1582
1583 #ifdef LDAP_CONNECTIONLESS
1584 if( conn->c_is_udp ) {
1585 if( tag == LBER_OCTETSTRING ) {
1586 if ( (tag = ber_get_stringa( ber, &cdn )) != LBER_ERROR )
1587 tag = ber_peek_tag( ber, &len );
1588 }
1589 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1590 Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag );
1591 ber_free( ber, 1 );
1592 return 0;
1593 }
1594 }
1595 #endif
1596
1597 if(tag == LDAP_REQ_BIND) {
1598 /* immediately abandon all existing operations upon BIND */
1599 connection_abandon( conn );
1600 }
1601
1602 ctx = cri->ctx;
1603 op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++, ctx );
1604
1605 Debug( LDAP_DEBUG_TRACE, "op tag 0x%lx, time %ld\n", tag,
1606 (long) op->o_time );
1607
1608 op->o_conn = conn;
1609 /* clear state if the connection is being reused from inactive */
1610 if ( conn->c_conn_state == SLAP_C_INACTIVE ) {
1611 memset( &conn->c_pagedresults_state, 0,
1612 sizeof( conn->c_pagedresults_state ) );
1613 }
1614
1615 op->o_res_ber = NULL;
1616
1617 #ifdef LDAP_CONNECTIONLESS
1618 if (conn->c_is_udp) {
1619 if ( cdn ) {
1620 ber_str2bv( cdn, 0, 1, &op->o_dn );
1621 op->o_protocol = LDAP_VERSION2;
1622 }
1623 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1624 if (op->o_res_ber == NULL) return 1;
1625
1626 rc = ber_write( op->o_res_ber, (char *)&peeraddr,
1627 sizeof(struct sockaddr), 0 );
1628
1629 if (rc != sizeof(struct sockaddr)) {
1630 Debug( LDAP_DEBUG_ANY, "ber_write failed\n" );
1631 return 1;
1632 }
1633
1634 if (op->o_protocol == LDAP_VERSION2) {
1635 rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1636 if (rc == -1) {
1637 Debug( LDAP_DEBUG_ANY, "ber_write failed\n" );
1638 return rc;
1639 }
1640 }
1641 }
1642 #endif /* LDAP_CONNECTIONLESS */
1643
1644 rc = 0;
1645
1646 /* Don't process requests when the conn is in the middle of a
1647 * Bind, or if it's closing. Also, don't let any single conn
1648 * use up all the available threads, and don't execute if we're
1649 * currently blocked on output. And don't execute if there are
1650 * already pending ops, let them go first. Abandon operations
1651 * get exceptions to some, but not all, cases.
1652 */
1653 switch( tag ){
1654 default:
1655 /* Abandon and Unbind are exempt from these checks */
1656 if (conn->c_conn_state == SLAP_C_CLOSING) {
1657 defer = "closing";
1658 break;
1659 } else if (conn->c_writewaiter) {
1660 defer = "awaiting write";
1661 break;
1662 } else if (conn->c_n_ops_pending) {
1663 defer = "pending operations";
1664 break;
1665 }
1666 /* FALLTHRU */
1667 case LDAP_REQ_ABANDON:
1668 /* Unbind is exempt from these checks */
1669 if (conn->c_n_ops_executing >= connection_pool_max/2) {
1670 defer = "too many executing";
1671 break;
1672 } else if (conn->c_conn_state == SLAP_C_BINDING) {
1673 defer = "binding";
1674 break;
1675 }
1676 /* FALLTHRU */
1677 case LDAP_REQ_UNBIND:
1678 break;
1679 }
1680
1681 if( defer ) {
1682 int max = conn->c_dn.bv_len
1683 ? slap_conn_max_pending_auth
1684 : slap_conn_max_pending;
1685
1686 Debug( LDAP_DEBUG_ANY,
1687 "connection_input: conn=%lu deferring operation: %s\n",
1688 conn->c_connid, defer );
1689 conn->c_n_ops_pending++;
1690 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1691 rc = ( conn->c_n_ops_pending > max ) ? -1 : 0;
1692
1693 } else {
1694 conn->c_n_ops_executing++;
1695
1696 /*
1697 * The first op will be processed in the same thread context,
1698 * as long as there is only one op total.
1699 * Subsequent ops will be submitted to the pool by
1700 * calling connection_op_activate()
1701 */
1702 if ( cri->op == NULL ) {
1703 /* the first incoming request */
1704 connection_op_queue( op );
1705 cri->op = op;
1706 } else {
1707 if ( !cri->nullop ) {
1708 cri->nullop = 1;
1709 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1710 connection_operation, (void *) cri->op );
1711 }
1712 connection_op_activate( op );
1713 }
1714 }
1715
1716 return rc;
1717 }
1718
1719 static int
connection_resched(Connection * conn)1720 connection_resched( Connection *conn )
1721 {
1722 Operation *op;
1723
1724 if( conn->c_writewaiter )
1725 return 0;
1726
1727 if( conn->c_conn_state == SLAP_C_CLOSING ) {
1728 Debug( LDAP_DEBUG_CONNS, "connection_resched: "
1729 "attempting closing conn=%lu sd=%d\n",
1730 conn->c_connid, conn->c_sd );
1731 connection_close( conn );
1732 return 0;
1733 }
1734
1735 if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1736 /* other states need different handling */
1737 return 0;
1738 }
1739
1740 while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1741 if ( conn->c_n_ops_executing > connection_pool_max/2 ) break;
1742
1743 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1744 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1745
1746 /* pending operations should not be marked for abandonment */
1747 assert(!op->o_abandon);
1748
1749 conn->c_n_ops_pending--;
1750 conn->c_n_ops_executing++;
1751
1752 connection_op_activate( op );
1753
1754 if ( conn->c_conn_state == SLAP_C_BINDING ) break;
1755 }
1756 return 0;
1757 }
1758
1759 static void
connection_init_log_prefix(Operation * op)1760 connection_init_log_prefix( Operation *op )
1761 {
1762 if ( op->o_connid == (unsigned long)(-1) ) {
1763 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1764 "conn=-1 op=%lu", op->o_opid );
1765
1766 } else {
1767 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1768 "conn=%lu op=%lu", op->o_connid, op->o_opid );
1769 }
1770 }
1771
connection_bind_cleanup_cb(Operation * op,SlapReply * rs)1772 static int connection_bind_cleanup_cb( Operation *op, SlapReply *rs )
1773 {
1774 op->o_conn->c_sasl_bindop = NULL;
1775
1776 ch_free( op->o_callback );
1777 op->o_callback = NULL;
1778
1779 return SLAP_CB_CONTINUE;
1780 }
1781
connection_bind_cb(Operation * op,SlapReply * rs)1782 static int connection_bind_cb( Operation *op, SlapReply *rs )
1783 {
1784 ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1785 op->o_conn->c_sasl_bind_in_progress =
1786 ( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS );
1787
1788 /* Moved here from bind.c due to ITS#4158 */
1789 op->o_conn->c_sasl_bindop = NULL;
1790 if ( op->orb_method == LDAP_AUTH_SASL ) {
1791 if( rs->sr_err == LDAP_SUCCESS ) {
1792 ber_dupbv(&op->o_conn->c_dn, &op->orb_edn);
1793 if( !BER_BVISEMPTY( &op->orb_edn ) ) {
1794 /* edn is always normalized already */
1795 ber_dupbv( &op->o_conn->c_ndn, &op->o_conn->c_dn );
1796 }
1797 op->o_tmpfree( op->orb_edn.bv_val, op->o_tmpmemctx );
1798 BER_BVZERO( &op->orb_edn );
1799 op->o_conn->c_authmech = op->o_conn->c_sasl_bind_mech;
1800 BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1801
1802 op->o_conn->c_sasl_ssf = op->orb_ssf;
1803 if( op->orb_ssf > op->o_conn->c_ssf ) {
1804 op->o_conn->c_ssf = op->orb_ssf;
1805 }
1806
1807 if( !BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
1808 ber_len_t max = sockbuf_max_incoming_auth;
1809 ber_sockbuf_ctrl( op->o_conn->c_sb,
1810 LBER_SB_OPT_SET_MAX_INCOMING, &max );
1811 }
1812
1813 /* log authorization identity */
1814 Debug( LDAP_DEBUG_STATS,
1815 "%s BIND dn=\"%s\" mech=%s bind_ssf=%d ssf=%d\n",
1816 op->o_log_prefix,
1817 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1818 op->o_conn->c_authmech.bv_val,
1819 op->orb_ssf, op->o_conn->c_ssf );
1820
1821 Debug( LDAP_DEBUG_TRACE,
1822 "do_bind: SASL/%s bind: dn=\"%s\" bind_ssf=%d\n",
1823 op->o_conn->c_authmech.bv_val,
1824 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1825 op->orb_ssf );
1826
1827 } else if ( rs->sr_err != LDAP_SASL_BIND_IN_PROGRESS ) {
1828 if ( !BER_BVISNULL( &op->o_conn->c_sasl_bind_mech ) ) {
1829 free( op->o_conn->c_sasl_bind_mech.bv_val );
1830 BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1831 }
1832 }
1833 }
1834 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1835
1836 ch_free( op->o_callback );
1837 op->o_callback = NULL;
1838
1839 return SLAP_CB_CONTINUE;
1840 }
1841
connection_op_queue(Operation * op)1842 static void connection_op_queue( Operation *op )
1843 {
1844 ber_tag_t tag = op->o_tag;
1845
1846 if (tag == LDAP_REQ_BIND) {
1847 slap_callback *sc = ch_calloc( 1, sizeof( slap_callback ));
1848 sc->sc_response = connection_bind_cb;
1849 sc->sc_cleanup = connection_bind_cleanup_cb;
1850 sc->sc_next = op->o_callback;
1851 op->o_callback = sc;
1852 op->o_conn->c_conn_state = SLAP_C_BINDING;
1853 }
1854
1855 if (!op->o_dn.bv_len) {
1856 op->o_authz = op->o_conn->c_authz;
1857 if ( BER_BVISNULL( &op->o_conn->c_sasl_authz_dn )) {
1858 ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1859 ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1860 } else {
1861 ber_dupbv( &op->o_dn, &op->o_conn->c_sasl_authz_dn );
1862 ber_dupbv( &op->o_ndn, &op->o_conn->c_sasl_authz_dn );
1863 }
1864 }
1865
1866 op->o_authtype = op->o_conn->c_authtype;
1867 ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1868
1869 if (!op->o_protocol) {
1870 op->o_protocol = op->o_conn->c_protocol
1871 ? op->o_conn->c_protocol : LDAP_VERSION3;
1872 }
1873
1874 if (op->o_conn->c_conn_state == SLAP_C_INACTIVE &&
1875 op->o_protocol > LDAP_VERSION2)
1876 {
1877 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1878 }
1879
1880 op->o_connid = op->o_conn->c_connid;
1881 connection_init_log_prefix( op );
1882
1883 LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1884 }
1885
connection_op_activate(Operation * op)1886 static int connection_op_activate( Operation *op )
1887 {
1888 int rc;
1889
1890 connection_op_queue( op );
1891
1892 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1893 connection_operation, (void *) op );
1894
1895 if ( rc != 0 ) {
1896 Debug( LDAP_DEBUG_ANY,
1897 "connection_op_activate: submit failed (%d) for conn=%lu\n",
1898 rc, op->o_connid );
1899 /* should move op to pending list */
1900 }
1901
1902 return rc;
1903 }
1904
connection_write(ber_socket_t s)1905 int connection_write(ber_socket_t s)
1906 {
1907 Connection *c;
1908 Operation *op;
1909 int wantwrite;
1910
1911 assert( connections != NULL );
1912
1913 c = connection_get( s );
1914 if( c == NULL ) {
1915 Debug( LDAP_DEBUG_ANY,
1916 "connection_write(%ld): no connection!\n",
1917 (long)s );
1918 return -1;
1919 }
1920
1921 slapd_clr_write( s, 0 );
1922
1923 #ifdef HAVE_TLS
1924 if ( c->c_is_tls && c->c_needs_tls_accept ) {
1925 connection_return( c );
1926 connection_read_activate( s );
1927 return 0;
1928 }
1929 #endif
1930
1931 c->c_n_write++;
1932
1933 Debug( LDAP_DEBUG_TRACE,
1934 "connection_write(%d): waking output for id=%lu\n",
1935 s, c->c_connid );
1936
1937 wantwrite = ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL );
1938 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL )) {
1939 /* don't wakeup twice */
1940 slapd_set_read( s, !wantwrite );
1941 }
1942 if ( wantwrite ) {
1943 slapd_set_write( s, 1 );
1944 }
1945
1946 /* If there are ops pending because of a writewaiter,
1947 * start one up.
1948 */
1949 while ((op = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
1950 if ( !c->c_writewaiter ) break;
1951 if ( c->c_n_ops_executing > connection_pool_max/2 ) break;
1952
1953 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
1954 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1955
1956 /* pending operations should not be marked for abandonment */
1957 assert(!op->o_abandon);
1958
1959 c->c_n_ops_pending--;
1960 c->c_n_ops_executing++;
1961
1962 connection_op_activate( op );
1963
1964 break;
1965 }
1966
1967 connection_return( c );
1968 return 0;
1969 }
1970
connection_write_resume(Connection * c)1971 void connection_write_resume( Connection *c )
1972 {
1973 Operation *op;
1974
1975 ldap_pvt_thread_mutex_lock( &c->c_mutex );
1976 /* If there are ops pending because of a writewaiter,
1977 * start one up.
1978 */
1979 while ((op = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
1980 if ( c->c_n_ops_executing > connection_pool_max/2 ) break;
1981
1982 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
1983 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1984
1985 /* pending operations should not be marked for abandonment */
1986 assert(!op->o_abandon);
1987
1988 c->c_n_ops_pending--;
1989 c->c_n_ops_executing++;
1990
1991 connection_op_activate( op );
1992
1993 break;
1994 }
1995
1996 connection_return( c );
1997 }
1998
1999 #ifdef LDAP_SLAPI
2000 typedef struct conn_fake_extblock {
2001 void *eb_conn;
2002 void *eb_op;
2003 } conn_fake_extblock;
2004
2005 static void
connection_fake_destroy(void * key,void * data)2006 connection_fake_destroy(
2007 void *key,
2008 void *data )
2009 {
2010 Connection conn = {0};
2011 Operation op = {0};
2012 Opheader ohdr = {0};
2013
2014 conn_fake_extblock *eb = data;
2015
2016 op.o_hdr = &ohdr;
2017 op.o_hdr->oh_extensions = eb->eb_op;
2018 conn.c_extensions = eb->eb_conn;
2019 op.o_conn = &conn;
2020 conn.c_connid = -1;
2021 op.o_connid = -1;
2022
2023 ber_memfree_x( eb, NULL );
2024 slapi_int_free_object_extensions( SLAPI_X_EXT_OPERATION, &op );
2025 slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION, &conn );
2026 }
2027 #endif
2028
2029 void
connection_fake_init(Connection * conn,OperationBuffer * opbuf,void * ctx)2030 connection_fake_init(
2031 Connection *conn,
2032 OperationBuffer *opbuf,
2033 void *ctx )
2034 {
2035 connection_fake_init2( conn, opbuf, ctx, 1 );
2036 }
2037
2038 void
operation_fake_init(Connection * conn,Operation * op,void * ctx,int newmem)2039 operation_fake_init(
2040 Connection *conn,
2041 Operation *op,
2042 void *ctx,
2043 int newmem )
2044 {
2045 /* set memory context */
2046 op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx,
2047 newmem );
2048 op->o_tmpmfuncs = &slap_sl_mfuncs;
2049 op->o_threadctx = ctx;
2050 op->o_tid = ldap_pvt_thread_pool_tid( ctx );
2051
2052 op->o_counters = &slap_counters;
2053 op->o_conn = conn;
2054 op->o_connid = op->o_conn->c_connid;
2055 connection_init_log_prefix( op );
2056 }
2057
2058
2059 void
connection_fake_init2(Connection * conn,OperationBuffer * opbuf,void * ctx,int newmem)2060 connection_fake_init2(
2061 Connection *conn,
2062 OperationBuffer *opbuf,
2063 void *ctx,
2064 int newmem )
2065 {
2066 Operation *op = (Operation *) opbuf;
2067
2068 conn->c_connid = -1;
2069 conn->c_conn_idx = -1;
2070 conn->c_send_ldap_result = slap_send_ldap_result;
2071 conn->c_send_search_entry = slap_send_search_entry;
2072 conn->c_send_search_reference = slap_send_search_reference;
2073 conn->c_send_ldap_extended = slap_send_ldap_extended;
2074 conn->c_send_ldap_intermediate = slap_send_ldap_intermediate;
2075 conn->c_listener = (Listener *)&dummy_list;
2076 conn->c_peer_domain = slap_empty_bv;
2077 conn->c_peer_name = slap_empty_bv;
2078
2079 memset( opbuf, 0, sizeof( *opbuf ));
2080 op->o_hdr = &opbuf->ob_hdr;
2081 op->o_controls = opbuf->ob_controls;
2082
2083 operation_fake_init( conn, op, ctx, newmem );
2084
2085 #ifdef LDAP_SLAPI
2086 if ( slapi_plugins_used ) {
2087 conn_fake_extblock *eb;
2088 void *ebx = NULL;
2089
2090 /* Use thread keys to make sure these eventually get cleaned up */
2091 if ( ldap_pvt_thread_pool_getkey( ctx, (void *)connection_fake_init,
2092 &ebx, NULL )) {
2093 eb = ch_malloc( sizeof( *eb ));
2094 slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, conn );
2095 slapi_int_create_object_extensions( SLAPI_X_EXT_OPERATION, op );
2096 eb->eb_conn = conn->c_extensions;
2097 eb->eb_op = op->o_hdr->oh_extensions;
2098 ldap_pvt_thread_pool_setkey( ctx, (void *)connection_fake_init,
2099 eb, connection_fake_destroy, NULL, NULL );
2100 } else {
2101 eb = ebx;
2102 conn->c_extensions = eb->eb_conn;
2103 op->o_hdr->oh_extensions = eb->eb_op;
2104 }
2105 }
2106 #endif /* LDAP_SLAPI */
2107
2108 slap_op_time( &op->o_time, &op->o_tincr );
2109 }
2110
2111 void
connection_assign_nextid(Connection * conn)2112 connection_assign_nextid( Connection *conn )
2113 {
2114 ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
2115 conn->c_connid = conn_nextid++;
2116 ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
2117 }
2118