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[openldap] / servers / slapd / connection.c
1 /* $OpenLDAP$ */
2 /*
3  * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
5  */
6
7 #include "portable.h"
8
9 #include <stdio.h>
10 #include <limits.h>
11
12 #include <ac/socket.h>
13 #include <ac/errno.h>
14 #include <ac/string.h>
15 #include <ac/time.h>
16 #include <ac/unistd.h>
17
18 #include "ldap_pvt.h"
19 #include "lutil.h"
20 #include "slap.h"
21
22 /* protected by connections_mutex */
23 static ldap_pvt_thread_mutex_t connections_mutex;
24 static Connection *connections = NULL;
25 static unsigned long conn_nextid = 0;
26
27 /* structure state (protected by connections_mutex) */
28 #define SLAP_C_UNINITIALIZED    0x00    /* MUST BE ZERO (0) */
29 #define SLAP_C_UNUSED                   0x01
30 #define SLAP_C_USED                             0x02
31
32 /* connection state (protected by c_mutex ) */
33 #define SLAP_C_INVALID                  0x00    /* MUST BE ZERO (0) */
34 #define SLAP_C_INACTIVE                 0x01    /* zero threads */
35 #define SLAP_C_ACTIVE                   0x02    /* one or more threads */
36 #define SLAP_C_BINDING                  0x03    /* binding */
37 #define SLAP_C_CLOSING                  0x04    /* closing */
38
39 const char *
40 connection_state2str( int state )
41 {
42         switch( state ) {
43         case SLAP_C_INVALID:    return "!";             
44         case SLAP_C_INACTIVE:   return "|";             
45         case SLAP_C_ACTIVE:             return "";                      
46         case SLAP_C_BINDING:    return "B";
47         case SLAP_C_CLOSING:    return "C";                     
48         }
49
50         return "?";
51 }
52
53 static Connection* connection_get( ber_socket_t s );
54
55 static int connection_input( Connection *c );
56 static void connection_close( Connection *c );
57
58 static int connection_op_activate( Connection *conn, Operation *op );
59 static int connection_resched( Connection *conn );
60 static void connection_abandon( Connection *conn );
61 static void connection_destroy( Connection *c );
62
63 static ldap_pvt_thread_start_t connection_operation;
64
65 struct co_arg {
66         Connection      *co_conn;
67         Operation       *co_op;
68 };
69
70 /*
71  * Initialize connection management infrastructure.
72  */
73 int connections_init(void)
74 {
75         assert( connections == NULL );
76
77         if( connections != NULL) {
78 #ifdef NEW_LOGGING
79                 LDAP_LOG( CONNECTION, INFO,
80                            "connections_init:  already initialized.\n", 0, 0, 0 );
81 #else
82                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
83                         0, 0, 0 );
84 #endif
85                 return -1;
86         }
87
88         /* should check return of every call */
89         ldap_pvt_thread_mutex_init( &connections_mutex );
90
91         connections = (Connection *) calloc( dtblsize, sizeof(Connection) );
92
93         if( connections == NULL ) {
94 #ifdef NEW_LOGGING
95                 LDAP_LOG( CONNECTION, ERR,
96                            "connections_init: allocation (%d * %ld) of connection "
97                            "array failed\n", dtblsize, (long) sizeof(Connection), 0 );
98 #else
99                 Debug( LDAP_DEBUG_ANY,
100                         "connections_init: allocation (%d*%ld) of connection array failed\n",
101                         dtblsize, (long) sizeof(Connection), 0 );
102 #endif
103                 return -1;
104         }
105
106     assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
107     assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
108
109         /*
110          * per entry initialization of the Connection array initialization
111          * will be done by connection_init()
112          */ 
113
114         return 0;
115 }
116
117 /*
118  * Destroy connection management infrastructure.
119  */
120 int connections_destroy(void)
121 {
122         ber_socket_t i;
123
124         /* should check return of every call */
125
126         if( connections == NULL) {
127 #ifdef NEW_LOGGING
128                 LDAP_LOG( CONNECTION, INFO,
129                            "connections_destroy: nothing to destroy.\n", 0, 0, 0 );
130 #else
131                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
132                         0, 0, 0 );
133 #endif
134                 return -1;
135         }
136
137         for ( i = 0; i < dtblsize; i++ ) {
138                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
139                         ber_sockbuf_free( connections[i].c_sb );
140                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
141                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
142                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
143                 }
144         }
145
146         free( connections );
147         connections = NULL;
148
149         ldap_pvt_thread_mutex_destroy( &connections_mutex );
150         return 0;
151 }
152
153 /*
154  * shutdown all connections
155  */
156 int connections_shutdown(void)
157 {
158         ber_socket_t i;
159
160         ldap_pvt_thread_mutex_lock( &connections_mutex );
161
162         for ( i = 0; i < dtblsize; i++ ) {
163                 if( connections[i].c_struct_state != SLAP_C_USED ) {
164                         continue;
165                 }
166
167                 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
168
169                 /* connections_mutex and c_mutex are locked */
170                 connection_closing( &connections[i] );
171                 connection_close( &connections[i] );
172
173                 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
174         }
175
176         ldap_pvt_thread_mutex_unlock( &connections_mutex );
177
178         return 0;
179 }
180
181 /*
182  * Timeout idle connections.
183  */
184 int connections_timeout_idle(time_t now)
185 {
186         int i = 0;
187         int connindex;
188         Connection* c;
189
190         for( c = connection_first( &connindex );
191                 c != NULL;
192                 c = connection_next( c, &connindex ) )
193         {
194                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
195                         /* close it */
196                         connection_closing( c );
197                         connection_close( c );
198                         i++;
199                 }
200         }
201         connection_done( c );
202
203         return i;
204 }
205
206 static Connection* connection_get( ber_socket_t s )
207 {
208         /* connections_mutex should be locked by caller */
209
210         Connection *c;
211
212 #ifdef NEW_LOGGING
213         LDAP_LOG( CONNECTION, ENTRY, "connection_get: socket %ld\n", (long)s, 0, 0 );
214 #else
215         Debug( LDAP_DEBUG_ARGS,
216                 "connection_get(%ld)\n",
217                 (long) s, 0, 0 );
218 #endif
219
220         assert( connections != NULL );
221
222         if(s == AC_SOCKET_INVALID) {
223                 return NULL;
224         }
225
226 #ifndef HAVE_WINSOCK
227         c = &connections[s];
228
229         assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
230
231 #else
232         c = NULL;
233         {
234                 ber_socket_t i, sd;
235
236                 for(i=0; i<dtblsize; i++) {
237                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
238                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
239                                 assert( connections[i].c_sb == 0 );
240                                 break;
241                         }
242
243                         ber_sockbuf_ctrl( connections[i].c_sb,
244                                 LBER_SB_OPT_GET_FD, &sd );
245
246                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
247                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
248                                 assert( sd == AC_SOCKET_INVALID );
249                                 continue;
250                         }
251
252                         /* state can actually change from used -> unused by resched,
253                          * so don't assert details here.
254                          */
255
256                         if( sd == s ) {
257                                 c = &connections[i];
258                                 break;
259                         }
260                 }
261         }
262 #endif
263
264         if( c != NULL ) {
265                 ber_socket_t    sd;
266
267                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
268
269                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
270                 if( c->c_struct_state != SLAP_C_USED ) {
271                         /* connection must have been closed due to resched */
272
273                         assert( c->c_conn_state == SLAP_C_INVALID );
274                         assert( sd == AC_SOCKET_INVALID );
275
276 #ifdef NEW_LOGGING
277                         LDAP_LOG( CONNECTION, ARGS, 
278                                 "connection_get:  connection %d not used\n", s, 0, 0 );
279 #else
280                         Debug( LDAP_DEBUG_TRACE,
281                                 "connection_get(%d): connection not used\n",
282                                 s, 0, 0 );
283 #endif
284
285                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
286                         return NULL;
287                 }
288
289 #ifdef NEW_LOGGING
290                 LDAP_LOG( CONNECTION, RESULTS, 
291                         "connection_get: get for %d got connid %lu\n", s, c->c_connid, 0 );
292 #else
293                 Debug( LDAP_DEBUG_TRACE,
294                         "connection_get(%d): got connid=%lu\n",
295                         s, c->c_connid, 0 );
296 #endif
297
298                 c->c_n_get++;
299
300                 assert( c->c_struct_state == SLAP_C_USED );
301                 assert( c->c_conn_state != SLAP_C_INVALID );
302                 assert( sd != AC_SOCKET_INVALID );
303
304 #ifdef SLAPD_MONITOR
305                 c->c_activitytime = slap_get_time();
306 #else
307                 if( global_idletimeout > 0 ) {
308                         c->c_activitytime = slap_get_time();
309                 }
310 #endif
311         }
312
313         return c;
314 }
315
316 static void connection_return( Connection *c )
317 {
318         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
319 }
320
321 long connection_init(
322         ber_socket_t s,
323         Listener *listener,
324         const char* dnsname,
325         const char* peername,
326         int tls_udp_option,
327         slap_ssf_t ssf,
328         const char *authid )
329 {
330         unsigned long id;
331         Connection *c;
332
333         assert( connections != NULL );
334
335         assert( listener != NULL );
336         assert( dnsname != NULL );
337         assert( peername != NULL );
338
339 #ifndef HAVE_TLS
340         assert( tls_udp_option != 1 );
341 #endif
342
343         if( s == AC_SOCKET_INVALID ) {
344 #ifdef NEW_LOGGING
345                 LDAP_LOG( CONNECTION, INFO, 
346                            "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
347 #else
348                 Debug( LDAP_DEBUG_ANY,
349                        "connection_init(%ld): invalid.\n",
350                        (long) s, 0, 0 );
351 #endif
352                 return -1;
353         }
354
355         assert( s >= 0 );
356 #ifndef HAVE_WINSOCK
357         assert( s < dtblsize );
358 #endif
359
360         ldap_pvt_thread_mutex_lock( &connections_mutex );
361
362 #ifndef HAVE_WINSOCK
363         c = &connections[s];
364
365 #else
366         {
367                 ber_socket_t    i;
368
369                 c = NULL;
370
371         for( i=0; i < dtblsize; i++) {
372                 ber_socket_t    sd;
373
374             if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
375                 assert( connections[i].c_sb == 0 );
376                 c = &connections[i];
377                 break;
378             }
379
380                         sd = AC_SOCKET_INVALID;
381                         if (connections[i].c_sb != NULL)
382                         ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd );
383             
384             if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
385                 assert( sd == AC_SOCKET_INVALID );
386                 c = &connections[i];
387                 break;
388             }
389
390             assert( connections[i].c_struct_state == SLAP_C_USED );
391             assert( connections[i].c_conn_state != SLAP_C_INVALID );
392             assert( sd != AC_SOCKET_INVALID );
393         }
394
395         if( c == NULL ) {
396 #ifdef NEW_LOGGING
397                 LDAP_LOG( CONNECTION, INFO, 
398                            "connection_init: skt %d      connection table full (%d/%d)\n",
399                            s, i, dtblsize );
400 #else
401                 Debug( LDAP_DEBUG_ANY,
402                                 "connection_init(%d): connection table full (%d/%d)\n",
403                                 s, i, dtblsize);
404 #endif
405             ldap_pvt_thread_mutex_unlock( &connections_mutex );
406             return -1;
407         }
408     }
409 #endif
410
411     assert( c != NULL );
412
413         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
414                 c->c_authmech.bv_val = NULL;
415                 c->c_authmech.bv_len = 0;
416                 c->c_dn.bv_val = NULL;
417                 c->c_dn.bv_len = 0;
418                 c->c_ndn.bv_val = NULL;
419                 c->c_ndn.bv_len = 0;
420                 c->c_groups = NULL;
421
422                 c->c_listener = NULL;
423                 c->c_peer_domain.bv_val = NULL;
424                 c->c_peer_domain.bv_len = 0;
425                 c->c_peer_name.bv_val = NULL;
426                 c->c_peer_name.bv_len = 0;
427
428                 LDAP_STAILQ_INIT(&c->c_ops);
429                 LDAP_STAILQ_INIT(&c->c_pending_ops);
430
431                 c->c_sasl_bind_mech.bv_val = NULL;
432                 c->c_sasl_bind_mech.bv_len = 0;
433                 c->c_sasl_context = NULL;
434                 c->c_sasl_extra = NULL;
435                 c->c_sasl_bindop = NULL;
436
437                 c->c_sb = ber_sockbuf_alloc( );
438
439                 {
440                         ber_len_t max = sockbuf_max_incoming;
441                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
442                 }
443
444                 c->c_currentber = NULL;
445
446                 /* should check status of thread calls */
447                 ldap_pvt_thread_mutex_init( &c->c_mutex );
448                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
449                 ldap_pvt_thread_cond_init( &c->c_write_cv );
450
451                 c->c_struct_state = SLAP_C_UNUSED;
452         }
453
454     ldap_pvt_thread_mutex_lock( &c->c_mutex );
455
456     assert( c->c_struct_state == SLAP_C_UNUSED );
457     assert( c->c_authmech.bv_val == NULL );
458     assert( c->c_dn.bv_val == NULL );
459     assert( c->c_ndn.bv_val == NULL );
460     assert( c->c_groups == NULL );
461     assert( c->c_listener == NULL );
462     assert( c->c_peer_domain.bv_val == NULL );
463     assert( c->c_peer_name.bv_val == NULL );
464     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
465     assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
466         assert( c->c_sasl_bind_mech.bv_val == NULL );
467         assert( c->c_sasl_context == NULL );
468         assert( c->c_sasl_extra == NULL );
469         assert( c->c_sasl_bindop == NULL );
470         assert( c->c_currentber == NULL );
471
472         c->c_listener = listener;
473         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
474         ber_str2bv( peername, 0, 1, &c->c_peer_name );
475
476     c->c_n_ops_received = 0;
477     c->c_n_ops_executing = 0;
478     c->c_n_ops_pending = 0;
479     c->c_n_ops_completed = 0;
480
481         c->c_n_get = 0;
482         c->c_n_read = 0;
483         c->c_n_write = 0;
484
485         /* set to zero until bind, implies LDAP_VERSION3 */
486         c->c_protocol = 0;
487
488 #ifdef SLAPD_MONITOR
489         c->c_activitytime = c->c_starttime = slap_get_time();
490 #else
491         if( global_idletimeout > 0 ) {
492                 c->c_activitytime = c->c_starttime = slap_get_time();
493         }
494 #endif
495
496 #ifdef LDAP_CONNECTIONLESS
497         c->c_is_udp = 0;
498         if( tls_udp_option == 2 ) {
499                 c->c_is_udp = 1;
500 #ifdef LDAP_DEBUG
501                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
502                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
503 #endif
504                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
505                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
506                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
507                         LBER_SBIOD_LEVEL_PROVIDER, NULL );
508         } else
509 #endif
510         {
511 #ifdef LDAP_DEBUG
512                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
513                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
514 #endif
515                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
516                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
517         }
518
519 #ifdef LDAP_DEBUG
520         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
521                 INT_MAX, (void*)"ldap_" );
522 #endif
523
524         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
525                 c /* non-NULL */ ) < 0 )
526         {
527 #ifdef NEW_LOGGING
528                 LDAP_LOG( CONNECTION, INFO, 
529                            "connection_init: conn %lu  set nonblocking failed\n",
530                            c->c_connid, 0, 0 );
531 #else
532                 Debug( LDAP_DEBUG_ANY,
533                         "connection_init(%d, %s): set nonblocking failed\n",
534                         s, c->c_peer_name.bv_val, 0 );
535 #endif
536         }
537
538     id = c->c_connid = conn_nextid++;
539
540     c->c_conn_state = SLAP_C_INACTIVE;
541     c->c_struct_state = SLAP_C_USED;
542
543         c->c_ssf = c->c_transport_ssf = ssf;
544         c->c_tls_ssf = 0;
545
546 #ifdef HAVE_TLS
547     if ( tls_udp_option == 1 ) {
548             c->c_is_tls = 1;
549             c->c_needs_tls_accept = 1;
550     } else {
551             c->c_is_tls = 0;
552             c->c_needs_tls_accept = 0;
553     }
554 #endif
555
556         slap_sasl_open( c );
557         slap_sasl_external( c, ssf, authid );
558
559     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
560     ldap_pvt_thread_mutex_unlock( &connections_mutex );
561
562     backend_connection_init(c);
563
564     return id;
565 }
566
567 void connection2anonymous( Connection *c )
568 {
569         assert( connections != NULL );
570         assert( c != NULL );
571
572         {
573                 ber_len_t max = sockbuf_max_incoming;
574                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
575         }
576
577         if(c->c_authmech.bv_val != NULL ) {
578                 free(c->c_authmech.bv_val);
579                 c->c_authmech.bv_val = NULL;
580         }
581         c->c_authmech.bv_len = 0;
582
583         if(c->c_dn.bv_val != NULL) {
584                 free(c->c_dn.bv_val);
585                 c->c_dn.bv_val = NULL;
586         }
587         c->c_dn.bv_len = 0;
588         if(c->c_ndn.bv_val != NULL) {
589                 free(c->c_ndn.bv_val);
590                 c->c_ndn.bv_val = NULL;
591         }
592         c->c_ndn.bv_len = 0;
593
594         c->c_authz_backend = NULL;
595         
596         {
597                 GroupAssertion *g, *n;
598                 for (g = c->c_groups; g; g=n) {
599                         n = g->ga_next;
600                         free(g);
601                 }
602                 c->c_groups = NULL;
603         }
604 }
605
606 static void
607 connection_destroy( Connection *c )
608 {
609         /* note: connections_mutex should be locked by caller */
610     ber_socket_t        sd;
611     unsigned long       connid;
612
613     assert( connections != NULL );
614     assert( c != NULL );
615     assert( c->c_struct_state != SLAP_C_UNUSED );
616     assert( c->c_conn_state != SLAP_C_INVALID );
617     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
618
619     /* only for stats (print -1 as "%lu" may give unexpected results ;) */
620     connid = c->c_connid;
621
622     backend_connection_destroy(c);
623
624     c->c_protocol = 0;
625     c->c_connid = -1;
626
627     c->c_activitytime = c->c_starttime = 0;
628
629         connection2anonymous( c );
630         c->c_listener = NULL;
631
632         if(c->c_peer_domain.bv_val != NULL) {
633                 free(c->c_peer_domain.bv_val);
634                 c->c_peer_domain.bv_val = NULL;
635         }
636         c->c_peer_domain.bv_len = 0;
637         if(c->c_peer_name.bv_val != NULL) {
638 #ifdef LDAP_PF_LOCAL
639                 /*
640                  * If peer was a domain socket, unlink. Mind you,
641                  * they may be un-named. Should we leave this to
642                  * the client?
643                  */
644                 if (strncmp(c->c_peer_name.bv_val, "PATH=", 
645                                         sizeof("PATH=") - 1) == 0) {
646                         char *path = c->c_peer_name.bv_val 
647                                 + sizeof("PATH=") - 1;
648                         if (path[0] != '\0') {
649                                 (void)unlink(path);
650                         }
651                 }
652 #endif /* LDAP_PF_LOCAL */
653
654                 free(c->c_peer_name.bv_val);
655                 c->c_peer_name.bv_val = NULL;
656         }
657         c->c_peer_name.bv_len = 0;
658
659         c->c_sasl_bind_in_progress = 0;
660         if(c->c_sasl_bind_mech.bv_val != NULL) {
661                 free(c->c_sasl_bind_mech.bv_val);
662                 c->c_sasl_bind_mech.bv_val = NULL;
663         }
664         c->c_sasl_bind_mech.bv_len = 0;
665
666         slap_sasl_close( c );
667
668         if ( c->c_currentber != NULL ) {
669                 ber_free( c->c_currentber, 1 );
670                 c->c_currentber = NULL;
671         }
672
673         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
674         if ( sd != AC_SOCKET_INVALID ) {
675                 slapd_remove( sd, 0 );
676
677                 Statslog( LDAP_DEBUG_STATS,
678                     "conn=%lu fd=%d closed\n",
679                         connid, sd, 0, 0, 0 );
680         }
681
682         ber_sockbuf_free( c->c_sb );
683
684         c->c_sb = ber_sockbuf_alloc( );
685
686         {
687                 ber_len_t max = sockbuf_max_incoming;
688                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
689         }
690
691     c->c_conn_state = SLAP_C_INVALID;
692     c->c_struct_state = SLAP_C_UNUSED;
693 }
694
695 int connection_state_closing( Connection *c )
696 {
697         /* c_mutex must be locked by caller */
698
699         int state;
700         assert( c != NULL );
701         assert( c->c_struct_state == SLAP_C_USED );
702
703         state = c->c_conn_state;
704
705         assert( state != SLAP_C_INVALID );
706
707         return state == SLAP_C_CLOSING;
708 }
709
710 static void connection_abandon( Connection *c )
711 {
712         /* c_mutex must be locked by caller */
713
714         Operation *o;
715
716         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
717                 o->o_abandon = 1;
718         }
719
720         /* remove pending operations */
721         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
722                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
723                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
724                 slap_op_free( o );
725         }
726 }
727
728 void connection_closing( Connection *c )
729 {
730         assert( connections != NULL );
731         assert( c != NULL );
732         assert( c->c_struct_state == SLAP_C_USED );
733         assert( c->c_conn_state != SLAP_C_INVALID );
734
735         /* c_mutex must be locked by caller */
736
737         if( c->c_conn_state != SLAP_C_CLOSING ) {
738                 ber_socket_t    sd;
739
740                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
741 #ifdef NEW_LOGGING
742                 LDAP_LOG( CONNECTION, DETAIL1, 
743                            "connection_closing: conn %lu readying socket %d for close.\n",
744                            c->c_connid, sd, 0 );
745 #else
746                 Debug( LDAP_DEBUG_TRACE,
747                         "connection_closing: readying conn=%lu sd=%d for close\n",
748                         c->c_connid, sd, 0 );
749 #endif
750                 /* update state to closing */
751                 c->c_conn_state = SLAP_C_CLOSING;
752
753                 /* don't listen on this port anymore */
754                 slapd_clr_read( sd, 1 );
755
756                 /* abandon active operations */
757                 connection_abandon( c );
758
759                 /* wake write blocked operations */
760                 slapd_clr_write( sd, 1 );
761                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
762         }
763 }
764
765 static void connection_close( Connection *c )
766 {
767         ber_socket_t    sd;
768
769         assert( connections != NULL );
770         assert( c != NULL );
771         assert( c->c_struct_state == SLAP_C_USED );
772         assert( c->c_conn_state == SLAP_C_CLOSING );
773
774         /* note: connections_mutex and c_mutex should be locked by caller */
775
776         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
777         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
778 #ifdef NEW_LOGGING
779                 LDAP_LOG( CONNECTION, DETAIL1, 
780                            "connection_close: conn %lu  deferring sd %d\n",
781                            c->c_connid, sd, 0 );
782 #else
783                 Debug( LDAP_DEBUG_TRACE,
784                         "connection_close: deferring conn=%lu sd=%d\n",
785                         c->c_connid, sd, 0 );
786 #endif
787                 return;
788         }
789
790 #ifdef NEW_LOGGING
791         LDAP_LOG( CONNECTION, RESULTS, 
792                    "connection_close: conn %lu  sd %d\n", c->c_connid, sd, 0 );
793 #else
794         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
795                 c->c_connid, sd, 0 );
796 #endif
797         connection_destroy( c );
798 }
799
800 unsigned long connections_nextid(void)
801 {
802         unsigned long id;
803         assert( connections != NULL );
804
805         ldap_pvt_thread_mutex_lock( &connections_mutex );
806
807         id = conn_nextid;
808
809         ldap_pvt_thread_mutex_unlock( &connections_mutex );
810
811         return id;
812 }
813
814 Connection* connection_first( ber_socket_t *index )
815 {
816         assert( connections != NULL );
817         assert( index != NULL );
818
819         ldap_pvt_thread_mutex_lock( &connections_mutex );
820
821         *index = 0;
822
823         return connection_next(NULL, index);
824 }
825
826 Connection* connection_next( Connection *c, ber_socket_t *index )
827 {
828         assert( connections != NULL );
829         assert( index != NULL );
830         assert( *index <= dtblsize );
831
832         if( c != NULL ) {
833                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
834         }
835
836         c = NULL;
837
838         for(; *index < dtblsize; (*index)++) {
839                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
840                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
841 #ifndef HAVE_WINSOCK
842                         continue;
843 #else
844                         break;
845 #endif
846                 }
847
848                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
849                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
850                         c = &connections[(*index)++];
851                         break;
852                 }
853
854                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
855                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
856         }
857
858         if( c != NULL ) {
859                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
860         }
861
862         return c;
863 }
864
865 void connection_done( Connection *c )
866 {
867         assert( connections != NULL );
868
869         if( c != NULL ) {
870                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
871         }
872
873         ldap_pvt_thread_mutex_unlock( &connections_mutex );
874 }
875
876 /*
877  * connection_activity - handle the request operation op on connection
878  * conn.  This routine figures out what kind of operation it is and
879  * calls the appropriate stub to handle it.
880  */
881
882 #ifdef SLAPD_MONITOR
883 #define INCR_OP(var,index) \
884         do { \
885                 ldap_pvt_thread_mutex_lock( &num_ops_mutex ); \
886                 (var)[(index)]++; \
887                 ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); \
888         } while (0)
889 #else /* !SLAPD_MONITOR */
890 #define INCR_OP(var,index) 
891 #endif /* !SLAPD_MONITOR */
892
893 static void *
894 connection_operation( void *ctx, void *arg_v )
895 {
896         int rc;
897         struct co_arg   *arg = arg_v;
898         ber_tag_t tag = arg->co_op->o_tag;
899 #ifdef SLAPD_MONITOR
900         ber_tag_t oldtag = tag;
901 #endif /* SLAPD_MONITOR */
902         Connection *conn = arg->co_conn;
903
904         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
905         num_ops_initiated++;
906         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
907
908         arg->co_op->o_threadctx = ctx;
909
910         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
911 #ifdef NEW_LOGGING
912                 LDAP_LOG( CONNECTION, ERR, 
913                         "connection_operation: conn %lu SASL bind in progress (tag=%ld).\n",
914                         conn->c_connid, (long)tag, 0 );
915 #else
916                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
917                         "error: SASL bind in progress (tag=%ld).\n",
918                         (long) tag, 0, 0 );
919 #endif
920                 send_ldap_result( conn, arg->co_op,
921                         rc = LDAP_OPERATIONS_ERROR,
922                         NULL, "SASL bind in progress", NULL, NULL );
923                 goto operations_error;
924         }
925
926         switch ( tag ) {
927         case LDAP_REQ_BIND:
928                 INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
929                 rc = do_bind( conn, arg->co_op );
930                 break;
931
932         case LDAP_REQ_UNBIND:
933                 INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
934                 rc = do_unbind( conn, arg->co_op );
935                 break;
936
937         case LDAP_REQ_ADD:
938                 INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
939                 rc = do_add( conn, arg->co_op );
940                 break;
941
942         case LDAP_REQ_DELETE:
943                 INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
944                 rc = do_delete( conn, arg->co_op );
945                 break;
946
947         case LDAP_REQ_MODRDN:
948                 INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
949                 rc = do_modrdn( conn, arg->co_op );
950                 break;
951
952         case LDAP_REQ_MODIFY:
953                 INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
954                 rc = do_modify( conn, arg->co_op );
955                 break;
956
957         case LDAP_REQ_COMPARE:
958                 INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
959                 rc = do_compare( conn, arg->co_op );
960                 break;
961
962         case LDAP_REQ_SEARCH:
963                 INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
964                 rc = do_search( conn, arg->co_op );
965                 break;
966
967         case LDAP_REQ_ABANDON:
968                 INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
969                 rc = do_abandon( conn, arg->co_op );
970                 break;
971
972         case LDAP_REQ_EXTENDED:
973                 INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
974                 rc = do_extended( conn, arg->co_op );
975                 break;
976
977         default:
978 #ifdef NEW_LOGGING
979                 LDAP_LOG( CONNECTION, INFO, 
980                            "connection_operation: conn %lu  unknown LDAP request 0x%lx\n",
981                            conn->c_connid, tag, 0  );
982 #else
983                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
984                     tag, 0, 0 );
985 #endif
986                 arg->co_op->o_tag = LBER_ERROR;
987                 send_ldap_disconnect( conn, arg->co_op,
988                         LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
989                 rc = -1;
990                 break;
991         }
992
993 #ifdef SLAPD_MONITOR
994         oldtag = tag;
995 #endif /* SLAPD_MONITOR */
996         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
997
998 operations_error:
999         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
1000         num_ops_completed++;
1001 #ifdef SLAPD_MONITOR
1002         switch (oldtag) {
1003         case LDAP_REQ_BIND:
1004                 num_ops_completed_[SLAP_OP_BIND]++;
1005                 break;
1006         case LDAP_REQ_UNBIND:
1007                 num_ops_completed_[SLAP_OP_UNBIND]++;
1008                 break;
1009         case LDAP_REQ_ADD:
1010                 num_ops_completed_[SLAP_OP_ADD]++;
1011                 break;
1012         case LDAP_REQ_DELETE:
1013                 num_ops_completed_[SLAP_OP_DELETE]++;
1014                 break;
1015         case LDAP_REQ_MODRDN:
1016                 num_ops_completed_[SLAP_OP_MODRDN]++;
1017                 break;
1018         case LDAP_REQ_MODIFY:
1019                 num_ops_completed_[SLAP_OP_MODIFY]++;
1020                 break;
1021         case LDAP_REQ_COMPARE:
1022                 num_ops_completed_[SLAP_OP_COMPARE]++;
1023                 break;
1024         case LDAP_REQ_SEARCH:
1025                 num_ops_completed_[SLAP_OP_SEARCH]++;
1026                 break;
1027         case LDAP_REQ_ABANDON:
1028                 num_ops_completed_[SLAP_OP_ABANDON]++;
1029                 break;
1030         case LDAP_REQ_EXTENDED:
1031                 num_ops_completed_[SLAP_OP_EXTENDED]++;
1032                 break;
1033         }
1034 #endif /* SLAPD_MONITOR */
1035         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1036
1037         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1038
1039         conn->c_n_ops_executing--;
1040         conn->c_n_ops_completed++;
1041
1042         LDAP_STAILQ_REMOVE( &conn->c_ops, arg->co_op, slap_op, o_next);
1043         LDAP_STAILQ_NEXT(arg->co_op, o_next) = NULL;
1044 #ifdef LDAP_CLIENT_UPDATE
1045         if ( !( arg->co_op->o_clientupdate_type & SLAP_LCUP_PERSIST ) ) {
1046                 slap_op_free( arg->co_op );
1047         }
1048 #endif /* LDAP_CLIENT_UPDATE */
1049         arg->co_op = NULL;
1050         arg->co_conn = NULL;
1051         free( (char *) arg );
1052         arg = NULL;
1053
1054         switch( tag ) {
1055         case LBER_ERROR:
1056         case LDAP_REQ_UNBIND:
1057                 /* c_mutex is locked */
1058                 connection_closing( conn );
1059                 break;
1060
1061         case LDAP_REQ_BIND:
1062                 conn->c_sasl_bind_in_progress =
1063                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1064
1065                 if( conn->c_conn_state == SLAP_C_BINDING) {
1066                         conn->c_conn_state = SLAP_C_ACTIVE;
1067                 }
1068         }
1069
1070         connection_resched( conn );
1071
1072         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1073
1074         return NULL;
1075 }
1076
1077 int connection_read(ber_socket_t s)
1078 {
1079         int rc = 0;
1080         Connection *c;
1081
1082         assert( connections != NULL );
1083
1084         ldap_pvt_thread_mutex_lock( &connections_mutex );
1085
1086         /* get (locked) connection */
1087         c = connection_get( s );
1088
1089         if( c == NULL ) {
1090 #ifdef NEW_LOGGING
1091                 LDAP_LOG( CONNECTION, INFO, 
1092                         "connection_read: sock %ld no connection\n", (long)s, 0, 0 );
1093 #else
1094                 Debug( LDAP_DEBUG_ANY,
1095                         "connection_read(%ld): no connection!\n",
1096                         (long) s, 0, 0 );
1097 #endif
1098                 slapd_remove(s, 0);
1099
1100                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1101                 return -1;
1102         }
1103
1104         c->c_n_read++;
1105
1106         if( c->c_conn_state == SLAP_C_CLOSING ) {
1107 #ifdef NEW_LOGGING
1108                 LDAP_LOG( CONNECTION, INFO, 
1109                         "connection_read: conn %lu connection closing, ignoring input\n",
1110                         c->c_connid, 0, 0 );
1111 #else
1112                 Debug( LDAP_DEBUG_TRACE,
1113                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1114                         s, c->c_connid, 0 );
1115 #endif
1116                 connection_return( c );
1117                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1118                 return 0;
1119         }
1120
1121 #ifdef NEW_LOGGING
1122         LDAP_LOG( CONNECTION, DETAIL1, 
1123                    "connection_read: conn %lu  checking for input.\n", 
1124                    c->c_connid, 0, 0  );
1125 #else
1126         Debug( LDAP_DEBUG_TRACE,
1127                 "connection_read(%d): checking for input on id=%lu\n",
1128                 s, c->c_connid, 0 );
1129 #endif
1130
1131 #ifdef HAVE_TLS
1132         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1133                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1134                 if ( rc < 0 ) {
1135 #if 0 /* required by next #if 0 */
1136                         struct timeval tv;
1137                         fd_set rfd;
1138 #endif
1139
1140 #ifdef NEW_LOGGING
1141                         LDAP_LOG( CONNECTION, ERR, 
1142                                    "connection_read: conn %lu  TLS accept error, error %d\n",
1143                                    c->c_connid, rc, 0 );
1144 #else
1145                         Debug( LDAP_DEBUG_TRACE,
1146                                 "connection_read(%d): TLS accept error "
1147                                 "error=%d id=%lu, closing\n",
1148                                 s, rc, c->c_connid );
1149 #endif
1150                         c->c_needs_tls_accept = 0;
1151                         /* connections_mutex and c_mutex are locked */
1152                         connection_closing( c );
1153
1154 #if 0
1155                         /* Drain input before close, to allow SSL error codes
1156                          * to propagate to client. */
1157                         FD_ZERO(&rfd);
1158                         FD_SET(s, &rfd);
1159                         for (rc=1; rc>0;) {
1160                             tv.tv_sec = 1;
1161                             tv.tv_usec = 0;
1162                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1163                             if (rc == 1) {
1164                                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL);
1165                                 }
1166                         }
1167 #endif
1168                         connection_close( c );
1169
1170                 } else if ( rc == 0 ) {
1171                         void *ssl;
1172                         struct berval authid = { 0, NULL };
1173
1174                         c->c_needs_tls_accept = 0;
1175
1176                         /* we need to let SASL know */
1177                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1178
1179                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1180                         if( c->c_tls_ssf > c->c_ssf ) {
1181                                 c->c_ssf = c->c_tls_ssf;
1182                         }
1183
1184                         rc = dnX509peerNormalize( ssl, &authid );
1185                         if ( rc != LDAP_SUCCESS ) {
1186 #ifdef NEW_LOGGING
1187                                 LDAP_LOG( CONNECTION, INFO, 
1188                                         "connection_read: conn %lu unable to get TLS client DN, "
1189                                         "error %d\n", c->c_connid, rc, 0 );
1190 #else
1191                                 Debug( LDAP_DEBUG_TRACE,
1192                                 "connection_read(%d): unable to get TLS client DN "
1193                                 "error=%d id=%lu\n",
1194                                 s, rc, c->c_connid );
1195 #endif
1196                         }
1197                         slap_sasl_external( c, c->c_tls_ssf, authid.bv_val );
1198                         if ( authid.bv_val )    free( authid.bv_val );
1199                 }
1200
1201                 /* if success and data is ready, fall thru to data input loop */
1202                 if( rc != 0 ||
1203                         !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1204                 {
1205                         connection_return( c );
1206                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1207                         return 0;
1208                 }
1209         }
1210 #endif
1211
1212 #ifdef HAVE_CYRUS_SASL
1213         if ( c->c_sasl_layers ) {
1214                 c->c_sasl_layers = 0;
1215
1216                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
1217
1218                 if( rc != LDAP_SUCCESS ) {
1219 #ifdef NEW_LOGGING
1220                         LDAP_LOG( CONNECTION, ERR, 
1221                                 "connection_read: conn %lu SASL install error %d, closing\n",
1222                                 c->c_connid, rc, 0 );
1223 #else
1224                         Debug( LDAP_DEBUG_TRACE,
1225                                 "connection_read(%d): SASL install error "
1226                                 "error=%d id=%lu, closing\n",
1227                                 s, rc, c->c_connid );
1228 #endif
1229                         /* connections_mutex and c_mutex are locked */
1230                         connection_closing( c );
1231                         connection_close( c );
1232                         connection_return( c );
1233                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1234                         return 0;
1235                 }
1236         }
1237 #endif
1238
1239 #define CONNECTION_INPUT_LOOP 1
1240
1241 #ifdef DATA_READY_LOOP
1242         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
1243 #elif CONNECTION_INPUT_LOOP
1244         while(!rc)
1245 #endif
1246         {
1247                 /* How do we do this without getting into a busy loop ? */
1248                 rc = connection_input( c );
1249         }
1250
1251         if( rc < 0 ) {
1252 #ifdef NEW_LOGGING
1253                 LDAP_LOG( CONNECTION, ERR, 
1254                         "connection_read: conn %lu  input error %d, closing.\n",
1255                         c->c_connid, rc, 0 );
1256 #else
1257                 Debug( LDAP_DEBUG_TRACE,
1258                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1259                         s, rc, c->c_connid );
1260 #endif
1261                 /* connections_mutex and c_mutex are locked */
1262                 connection_closing( c );
1263                 connection_close( c );
1264                 connection_return( c );
1265                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1266                 return 0;
1267         }
1268
1269         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1270                 slapd_set_read( s, 1 );
1271         }
1272
1273         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1274                 slapd_set_write( s, 1 );
1275         }
1276
1277         connection_return( c );
1278         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1279         return 0;
1280 }
1281
1282 static int
1283 connection_input(
1284     Connection *conn
1285 )
1286 {
1287         Operation *op;
1288         ber_tag_t       tag;
1289         ber_len_t       len;
1290         ber_int_t       msgid;
1291         BerElement      *ber;
1292 #ifdef LDAP_CONNECTIONLESS
1293         Sockaddr        peeraddr;
1294         char            *cdn = NULL;
1295 #endif
1296
1297         if ( conn->c_currentber == NULL &&
1298                 ( conn->c_currentber = ber_alloc()) == NULL )
1299         {
1300 #ifdef NEW_LOGGING
1301                 LDAP_LOG( CONNECTION, ERR, 
1302                         "connection_input: conn %lu  ber_alloc failed.\n", 
1303                         conn->c_connid, 0, 0 );
1304 #else
1305                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1306 #endif
1307                 return -1;
1308         }
1309
1310         errno = 0;
1311
1312 #ifdef LDAP_CONNECTIONLESS
1313         if ( conn->c_is_udp ) {
1314                 char    peername[sizeof("IP=255.255.255.255:65336")];
1315                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1316                         sizeof(struct sockaddr));
1317                 if (len != sizeof(struct sockaddr))
1318                         return 1;
1319                 sprintf( peername, "IP=%s:%d",
1320                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1321                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1322                 Statslog( LDAP_DEBUG_STATS,
1323                         "conn=%lu UDP request from %s (%s) accepted.\n",
1324                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1325         }
1326 #endif
1327         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1328         if ( tag != LDAP_TAG_MESSAGE ) {
1329                 int err = errno;
1330                 ber_socket_t    sd;
1331
1332                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1333
1334 #ifdef NEW_LOGGING
1335                 LDAP_LOG( CONNECTION, ERR, 
1336                         "connection_input: conn %lu  ber_get_next failed, errno %d (%s).\n",
1337                         conn->c_connid, err, sock_errstr(err) );
1338 #else
1339                 Debug( LDAP_DEBUG_TRACE,
1340                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1341                         sd, err, sock_errstr(err) );
1342 #endif
1343                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1344                         /* log, close and send error */
1345                         ber_free( conn->c_currentber, 1 );
1346                         conn->c_currentber = NULL;
1347
1348                         return -2;
1349                 }
1350                 return 1;
1351         }
1352
1353         ber = conn->c_currentber;
1354         conn->c_currentber = NULL;
1355
1356         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1357                 /* log, close and send error */
1358 #ifdef NEW_LOGGING
1359                 LDAP_LOG( CONNECTION, ERR, 
1360                         "connection_input: conn %lu  ber_get_int returns 0x%lx.\n",
1361                         conn->c_connid, tag, 0 );
1362 #else
1363                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1364                     0 );
1365 #endif
1366                 ber_free( ber, 1 );
1367                 return -1;
1368         }
1369
1370         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1371                 /* log, close and send error */
1372 #ifdef NEW_LOGGING
1373                 LDAP_LOG( CONNECTION, ERR, 
1374                            "connection_input: conn %lu  ber_peek_tag returns 0x%lx.\n",
1375                            conn->c_connid, tag, 0 );
1376 #else
1377                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1378                     0 );
1379 #endif
1380                 ber_free( ber, 1 );
1381
1382                 return -1;
1383         }
1384
1385 #ifdef LDAP_CONNECTIONLESS
1386         if( conn->c_is_udp ) {
1387                 if( tag == LBER_OCTETSTRING ) {
1388                         ber_get_stringa( ber, &cdn );
1389                         tag = ber_peek_tag(ber, &len);
1390                 }
1391                 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1392 #ifdef NEW_LOGGING
1393                     LDAP_LOG( CONNECTION, ERR, 
1394                                "connection_input: conn %lu  invalid req for UDP 0x%lx.\n",
1395                                conn->c_connid, tag, 0 );
1396 #else
1397                     Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1398                         0 );
1399 #endif
1400                     ber_free( ber, 1 );
1401                     return 0;
1402                 }
1403         }
1404 #endif
1405         if(tag == LDAP_REQ_BIND) {
1406                 /* immediately abandon all exiting operations upon BIND */
1407                 connection_abandon( conn );
1408         }
1409
1410         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1411
1412         op->o_conn = conn;
1413         op->vrFilter = NULL;
1414         op->o_pagedresults_state = conn->c_pagedresults_state;
1415 #ifdef LDAP_CONNECTIONLESS
1416         op->o_peeraddr = peeraddr;
1417         if (cdn ) {
1418             ber_str2bv( cdn, 0, 1, &op->o_dn );
1419             op->o_protocol = LDAP_VERSION2;
1420         }
1421 #endif
1422
1423         if ( conn->c_conn_state == SLAP_C_BINDING
1424                 || conn->c_conn_state == SLAP_C_CLOSING )
1425         {
1426 #ifdef NEW_LOGGING
1427                 LDAP_LOG( CONNECTION, INFO, 
1428                         "connection_input: conn %lu  deferring operation\n",
1429                         conn->c_connid, 0, 0 );
1430 #else
1431                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1432 #endif
1433                 conn->c_n_ops_pending++;
1434                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1435
1436         } else {
1437                 conn->c_n_ops_executing++;
1438                 connection_op_activate( conn, op );
1439         }
1440
1441 #ifdef NO_THREADS
1442         if ( conn->c_struct_state != SLAP_C_USED ) {
1443                 /* connection must have got closed underneath us */
1444                 return 1;
1445         }
1446 #endif
1447         assert( conn->c_struct_state == SLAP_C_USED );
1448
1449         return 0;
1450 }
1451
1452 static int
1453 connection_resched( Connection *conn )
1454 {
1455         Operation *op;
1456
1457         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1458                 int rc;
1459                 ber_socket_t    sd;
1460                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1461
1462                 /* us trylock to avoid possible deadlock */
1463                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1464
1465                 if( rc ) {
1466 #ifdef NEW_LOGGING
1467                         LDAP_LOG( CONNECTION, DETAIL1, 
1468                                 "connection_resched: conn %lu  reaquiring locks.\n",
1469                                 conn->c_connid, 0, 0 );
1470 #else
1471                         Debug( LDAP_DEBUG_TRACE,
1472                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1473                                 conn->c_connid, sd, 0 );
1474 #endif
1475                         /*
1476                          * reaquire locks in the right order...
1477                          * this may allow another thread to close this connection,
1478                          * so recheck state below.
1479                          */
1480                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1481                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1482                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1483                 }
1484
1485                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1486 #ifdef NEW_LOGGING
1487                         LDAP_LOG( CONNECTION, INFO, 
1488                                 "connection_resched: conn %lu  closed by other thread.\n",
1489                                 conn->c_connid, 0, 0 );
1490 #else
1491                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1492                                 "closed by other thread conn=%lu sd=%d\n",
1493                                 conn->c_connid, sd, 0 );
1494 #endif
1495                 } else {
1496 #ifdef NEW_LOGGING
1497                         LDAP_LOG( CONNECTION, DETAIL1, 
1498                                 "connection_resched: conn %lu  attempting closing.\n",
1499                                 conn->c_connid, 0, 0 );
1500 #else
1501                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1502                                 "attempting closing conn=%lu sd=%d\n",
1503                                 conn->c_connid, sd, 0 );
1504 #endif
1505                         connection_close( conn );
1506                 }
1507
1508                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1509                 return 0;
1510         }
1511
1512         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1513                 /* other states need different handling */
1514                 return 0;
1515         }
1516
1517         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1518                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1519                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1520                 /* pending operations should not be marked for abandonment */
1521                 assert(!op->o_abandon);
1522
1523                 conn->c_n_ops_pending--;
1524                 conn->c_n_ops_executing++;
1525
1526                 connection_op_activate( conn, op );
1527
1528                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1529                         break;
1530                 }
1531         }
1532         return 0;
1533 }
1534
1535 static int connection_op_activate( Connection *conn, Operation *op )
1536 {
1537         struct co_arg *arg;
1538         int status;
1539         ber_tag_t tag = op->o_tag;
1540
1541         if(tag == LDAP_REQ_BIND) {
1542                 conn->c_conn_state = SLAP_C_BINDING;
1543         }
1544
1545         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1546         arg->co_conn = conn;
1547         arg->co_op = op;
1548
1549         if (!arg->co_op->o_dn.bv_len) {
1550             arg->co_op->o_authz = conn->c_authz;
1551             arg->co_op->o_dn.bv_val = ch_strdup( conn->c_dn.bv_val ?
1552                 conn->c_dn.bv_val : "" );
1553             arg->co_op->o_ndn.bv_val = ch_strdup( conn->c_ndn.bv_val ?
1554                 conn->c_ndn.bv_val : "" );
1555         }
1556         arg->co_op->o_authtype = conn->c_authtype;
1557         ber_dupbv( &arg->co_op->o_authmech, &conn->c_authmech );
1558         
1559         if (!arg->co_op->o_protocol) {
1560             arg->co_op->o_protocol = conn->c_protocol
1561                 ? conn->c_protocol : LDAP_VERSION3;
1562         }
1563         arg->co_op->o_connid = conn->c_connid;
1564
1565         LDAP_STAILQ_INSERT_TAIL( &conn->c_ops, arg->co_op, o_next );
1566
1567         status = ldap_pvt_thread_pool_submit( &connection_pool,
1568                 connection_operation, (void *) arg );
1569
1570         if ( status != 0 ) {
1571 #ifdef NEW_LOGGING
1572                 LDAP_LOG( CONNECTION, ERR, 
1573                         "connection_op_activate: conn %lu        thread pool submit failed.\n",
1574                         conn->c_connid, 0, 0 );
1575 #else
1576                 Debug( LDAP_DEBUG_ANY,
1577                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1578 #endif
1579                 /* should move op to pending list */
1580         }
1581
1582         return status;
1583 }
1584
1585 int connection_write(ber_socket_t s)
1586 {
1587         Connection *c;
1588
1589         assert( connections != NULL );
1590
1591         ldap_pvt_thread_mutex_lock( &connections_mutex );
1592
1593         c = connection_get( s );
1594
1595         slapd_clr_write( s, 0);
1596
1597         if( c == NULL ) {
1598 #ifdef NEW_LOGGING
1599                 LDAP_LOG( CONNECTION, ERR, 
1600                         "connection_write: sock %ld  no connection!\n", (long)s, 0, 0);
1601 #else
1602                 Debug( LDAP_DEBUG_ANY,
1603                         "connection_write(%ld): no connection!\n",
1604                         (long) s, 0, 0 );
1605 #endif
1606                 slapd_remove(s, 0);
1607                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1608                 return -1;
1609         }
1610
1611         c->c_n_write++;
1612
1613 #ifdef NEW_LOGGING
1614         LDAP_LOG( CONNECTION, DETAIL1, 
1615                 "connection_write conn %lu  waking output.\n", c->c_connid, 0, 0 );
1616 #else
1617         Debug( LDAP_DEBUG_TRACE,
1618                 "connection_write(%d): waking output for id=%lu\n",
1619                 s, c->c_connid, 0 );
1620 #endif
1621         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1622
1623         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1624                 slapd_set_read( s, 1 );
1625         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1626                 slapd_set_write( s, 1 );
1627         connection_return( c );
1628         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1629         return 0;
1630 }
1631