git.sur5r.net Git - openldap/blob - servers/slapd/connection.c

   1 #include "portable.h"
   2
   3 #include <stdio.h>
   4
   5 #include <ac/socket.h>
   6 #include <ac/errno.h>
   7 #include <ac/signal.h>
   8 #include <ac/string.h>
   9 #include <ac/time.h>
  10
  11 #include "slap.h"
  12
  13 /* we need LBER internals */
  14 #include "../../libraries/liblber/lber-int.h"
  15
  16 /* protected by connections_mutex */
  17 static ldap_pvt_thread_mutex_t connections_mutex;
  18 static Connection *connections = NULL;
  19 static long conn_nextid = 0;
  20
  21 /* structure state (protected by connections_mutex) */
  22 #define SLAP_C_UNINITIALIZED    0x00    /* MUST BE ZERO (0) */
  23 #define SLAP_C_UNUSED                   0x01
  24 #define SLAP_C_USED                             0x02
  25
  26 /* connection state (protected by c_mutex ) */
  27 #define SLAP_C_INVALID                  0x00    /* MUST BE ZERO (0) */
  28 #define SLAP_C_INACTIVE                 0x01    /* zero threads */
  29 #define SLAP_C_ACTIVE                   0x02    /* one or more threads */
  30 #define SLAP_C_BINDING                  0x03    /* binding */
  31 #define SLAP_C_CLOSING                  0x04    /* closing */
  32
  33 static Connection* connection_get( int s );
  34
  35 static int connection_input( Connection *c );
  36 static void connection_close( Connection *c );
  37
  38 static int connection_op_activate( Connection *conn, Operation *op );
  39 static int connection_resched( Connection *conn );
  40
  41 struct co_arg {
  42         Connection      *co_conn;
  43         Operation       *co_op;
  44 };
  45
  46 /*
  47  * Initialize connection management infrastructure.
  48  */
  49 int connections_init(void)
  50 {
  51         assert( connections == NULL );
  52
  53         if( connections != NULL) {
  54                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
  55                         0, 0, 0 );
  56                 return -1;
  57         }
  58
  59         /* should check return of every call */
  60         ldap_pvt_thread_mutex_init( &connections_mutex );
  61
  62         connections = (Connection *) calloc( dtblsize, sizeof(Connection) );
  63
  64         if( connections == NULL ) {
  65                 Debug( LDAP_DEBUG_ANY,
  66                         "connections_init: allocation (%d*%ld) of connection array failed.\n",
  67                         dtblsize, (long) sizeof(Connection), 0 );
  68                 return -1;
  69         }
  70
  71     assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
  72     assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
  73
  74         /*
  75          * per entry initialization of the Connection array initialization
  76          * will be done by connection_init()
  77          */
  78
  79         return 0;
  80 }
  81
  82 /*
  83  * Destroy connection management infrastructure.
  84  */
  85 int connections_destroy(void)
  86 {
  87         int i;
  88
  89         /* should check return of every call */
  90
  91         if( connections == NULL) {
  92                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
  93                         0, 0, 0 );
  94                 return -1;
  95         }
  96
  97         for ( i = 0; i < dtblsize; i++ ) {
  98                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
  99                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 100                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
 101                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 102                 }
 103         }
 104
 105         free( connections );
 106         connections = NULL;
 107
 108         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 109         return 0;
 110 }
 111
 112 /*
 113  * shutdown all connections
 114  */
 115 int connections_shutdown(void)
 116 {
 117         int i;
 118
 119         ldap_pvt_thread_mutex_lock( &connections_mutex );
 120
 121         for ( i = 0; i < dtblsize; i++ ) {
 122                 if( connections[i].c_struct_state != SLAP_C_USED ) {
 123                         continue;
 124                 }
 125
 126                 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 127
 128                 /* connections_mutex and c_mutex are locked */
 129                 connection_closing( &connections[i] );
 130                 connection_close( &connections[i] );
 131
 132                 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 133         }
 134
 135         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 136
 137         return 0;
 138 }
 139
 140 static Connection* connection_get( int s )
 141 {
 142         /* connections_mutex should be locked by caller */
 143
 144         Connection *c;
 145
 146         Debug( LDAP_DEBUG_ARGS,
 147                 "connection_get(%d)\n",
 148                 s, 0, 0 );
 149
 150         assert( connections != NULL );
 151
 152         if(s < 0) {
 153                 return NULL;
 154         }
 155
 156 #ifndef HAVE_WINSOCK
 157         c = &connections[s];
 158
 159         assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 160
 161 #else
 162         c = NULL;
 163         {
 164                 int i;
 165
 166                 for(i=0; i<dtblsize; i++) {
 167                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 168                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 169                                 assert( connections[i].c_sb == 0 );
 170                                 break;
 171                         }
 172
 173                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 174                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 175                                 assert( !ber_pvt_sb_in_use( connections[i].c_sb ) );
 176                                 continue;
 177                         }
 178
 179                         assert( connections[i].c_struct_state == SLAP_C_USED );
 180                         assert( connections[i].c_conn_state != SLAP_C_INVALID );
 181                         assert( ber_pvt_sb_in_use( connections[i].c_sb ) );
 182
 183                         if( ber_pvt_sb_get_desc( connections[i].c_sb ) == s ) {
 184                                 c = &connections[i];
 185                                 break;
 186                         }
 187                 }
 188         }
 189 #endif
 190
 191         if( c != NULL ) {
 192                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 193
 194                 if( c->c_struct_state != SLAP_C_USED ) {
 195                         /* connection must have been closed due to resched */
 196                         assert( c->c_conn_state == SLAP_C_INVALID );
 197                         assert( !ber_pvt_sb_in_use( c->c_sb ) );
 198
 199                         Debug( LDAP_DEBUG_TRACE,
 200                                 "connection_get(%d): connection not used.\n",
 201                                 s, c->c_connid, 0 );
 202
 203                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 204                         return NULL;
 205                 }
 206
 207                 Debug( LDAP_DEBUG_TRACE,
 208                         "connection_get(%d): got connid=%ld\n",
 209                         s, c->c_connid, 0 );
 210
 211                 assert( c->c_struct_state == SLAP_C_USED );
 212                 assert( c->c_conn_state != SLAP_C_INVALID );
 213                 assert( ber_pvt_sb_in_use( c->c_sb ) );
 214         }
 215
 216         return c;
 217 }
 218
 219 static void connection_return( Connection *c )
 220 {
 221         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 222 }
 223
 224 long connection_init(
 225         int s,
 226         const char* name,
 227         const char* addr)
 228 {
 229         long id;
 230         Connection *c;
 231         assert( connections != NULL );
 232
 233         if( s < 0 ) {
 234         Debug( LDAP_DEBUG_ANY,
 235                         "connection_init(%d): invalid.\n",
 236                         s, 0, 0 );
 237                 return -1;
 238         }
 239
 240         assert( s >= 0 );
 241 #ifndef HAVE_WINSOCK
 242         assert( s < dtblsize );
 243 #endif
 244
 245         ldap_pvt_thread_mutex_lock( &connections_mutex );
 246
 247 #ifndef HAVE_WINSOCK
 248         c = &connections[s];
 249
 250 #else
 251         {
 252                 int i;
 253
 254                 c = NULL;
 255
 256         for( i=0; i < dtblsize; i++) {
 257             if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 258                 assert( connections[i].c_sb == 0 );
 259                 c = &connections[i];
 260                 break;
 261             }
 262
 263             if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 264                 assert( !ber_pvt_sb_in_use( connections[i].c_sb ));
 265                 c = &connections[i];
 266                 break;
 267             }
 268
 269             assert( connections[i].c_struct_state == SLAP_C_USED );
 270             assert( connections[i].c_conn_state != SLAP_C_INVALID );
 271             assert( ber_pvt_sb_in_use( connections[i].c_sb ));
 272         }
 273
 274         if( c == NULL ) {
 275                 Debug( LDAP_DEBUG_ANY,
 276                                 "connection_init(%d): connection table full (%d/%d).\n",
 277                                 s, i, dtblsize);
 278             ldap_pvt_thread_mutex_unlock( &connections_mutex );
 279             return -1;
 280         }
 281     }
 282 #endif
 283
 284     assert( c != NULL );
 285     assert( c->c_struct_state != SLAP_C_USED );
 286     assert( c->c_conn_state == SLAP_C_INVALID );
 287
 288     if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 289         c->c_dn = NULL;
 290         c->c_cdn = NULL;
 291         c->c_client_name = NULL;
 292         c->c_client_addr = NULL;
 293         c->c_ops = NULL;
 294         c->c_pending_ops = NULL;
 295
 296         c->c_sb = ber_sockbuf_alloc( );
 297
 298         /* should check status of thread calls */
 299         ldap_pvt_thread_mutex_init( &c->c_mutex );
 300         ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 301         ldap_pvt_thread_cond_init( &c->c_write_cv );
 302
 303         c->c_struct_state = SLAP_C_UNUSED;
 304     }
 305
 306     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 307
 308     assert( c->c_struct_state == SLAP_C_UNUSED );
 309     assert(     c->c_dn == NULL );
 310     assert(     c->c_cdn == NULL );
 311     assert( c->c_client_name == NULL );
 312     assert( c->c_client_addr == NULL );
 313     assert( c->c_ops == NULL );
 314     assert( c->c_pending_ops == NULL );
 315
 316     c->c_client_name = ch_strdup( name == NULL ? "" : name );
 317     c->c_client_addr = ch_strdup( addr );
 318
 319     c->c_n_ops_received = 0;
 320 #ifdef LDAP_COUNTERS
 321     c->c_n_ops_executing = 0;
 322     c->c_n_ops_pending = 0;
 323     c->c_n_ops_completed = 0;
 324 #endif
 325
 326     c->c_starttime = slap_get_time();
 327
 328     ber_pvt_sb_set_desc( c->c_sb, s );
 329     ber_pvt_sb_set_io( c->c_sb, &ber_pvt_sb_io_tcp, NULL );
 330
 331     if( ber_pvt_sb_set_nonblock( c->c_sb, 1 ) < 0 ) {
 332         Debug( LDAP_DEBUG_ANY,
 333             "connection_init(%d, %s, %s): set nonblocking failed\n",
 334             s, c->c_client_name, c->c_client_addr);
 335     }
 336
 337     id = c->c_connid = conn_nextid++;
 338
 339     c->c_conn_state = SLAP_C_INACTIVE;
 340     c->c_struct_state = SLAP_C_USED;
 341
 342     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 343     ldap_pvt_thread_mutex_unlock( &connections_mutex );
 344
 345     return id;
 346 }
 347
 348 static void
 349 connection_destroy( Connection *c )
 350 {
 351         /* note: connections_mutex should be locked by caller */
 352
 353     assert( connections != NULL );
 354     assert( c != NULL );
 355     assert( c->c_struct_state != SLAP_C_UNUSED );
 356     assert( c->c_conn_state != SLAP_C_INVALID );
 357     assert( c->c_ops == NULL );
 358
 359     c->c_struct_state = SLAP_C_UNUSED;
 360     c->c_conn_state = SLAP_C_INVALID;
 361
 362 #ifdef LDAP_COMPAT30
 363     c->c_version = 0;
 364 #endif
 365     c->c_protocol = 0;
 366
 367     c->c_starttime = 0;
 368
 369     if(c->c_dn != NULL) {
 370         free(c->c_dn);
 371         c->c_dn = NULL;
 372     }
 373         if(c->c_cdn != NULL) {
 374                 free(c->c_cdn);
 375                 c->c_cdn = NULL;
 376         }
 377         if(c->c_client_name != NULL) {
 378                 free(c->c_client_name);
 379                 c->c_client_name = NULL;
 380         }
 381         if(c->c_client_addr != NULL) {
 382                 free(c->c_client_addr);
 383                 c->c_client_addr = NULL;
 384         }
 385
 386         if ( ber_pvt_sb_in_use(c->c_sb) ) {
 387                 int sd = ber_pvt_sb_get_desc(c->c_sb);
 388
 389                 slapd_remove( sd, 0 );
 390                 ber_pvt_sb_close( c->c_sb );
 391
 392                 Statslog( LDAP_DEBUG_STATS,
 393                     "conn=%d fd=%d closed.\n",
 394                         c->c_connid, sd, 0, 0, 0 );
 395         }
 396
 397         ber_pvt_sb_destroy( c->c_sb );
 398 }
 399
 400 int connection_state_closing( Connection *c )
 401 {
 402         /* c_mutex must be locked by caller */
 403
 404         int state;
 405         assert( c != NULL );
 406         assert( c->c_struct_state == SLAP_C_USED );
 407
 408         state = c->c_conn_state;
 409
 410         assert( state != SLAP_C_INVALID );
 411
 412         return state == SLAP_C_CLOSING;
 413 }
 414
 415 void connection_closing( Connection *c )
 416 {
 417         assert( connections != NULL );
 418         assert( c != NULL );
 419         assert( c->c_struct_state == SLAP_C_USED );
 420         assert( c->c_conn_state != SLAP_C_INVALID );
 421
 422         /* c_mutex must be locked by caller */
 423
 424         if( c->c_conn_state != SLAP_C_CLOSING ) {
 425                 Operation *o;
 426
 427                 Debug( LDAP_DEBUG_TRACE,
 428                         "connection_closing: readying conn=%ld sd=%d for close.\n",
 429                         c->c_connid, ber_pvt_sb_get_desc( c->c_sb ), 0 );
 430
 431                 /* update state to closing */
 432                 c->c_conn_state = SLAP_C_CLOSING;
 433
 434                 /* don't listen on this port anymore */
 435                 slapd_clr_read( ber_pvt_sb_get_desc( c->c_sb ), 1 );
 436
 437                 /* shutdown I/O -- not yet implemented */
 438
 439                 /* abandon active operations */
 440                 for( o = c->c_ops; o != NULL; o = o->o_next ) {
 441                         ldap_pvt_thread_mutex_lock( &o->o_abandonmutex );
 442                         o->o_abandon = 1;
 443                         ldap_pvt_thread_mutex_unlock( &o->o_abandonmutex );
 444                 }
 445
 446                 /* remove pending operations */
 447                 for( o = slap_op_pop( &c->c_pending_ops );
 448                         o != NULL;
 449                         o = slap_op_pop( &c->c_pending_ops ) )
 450                 {
 451                         slap_op_free( o );
 452                 }
 453
 454                 /* wake write blocked operations */
 455                 slapd_clr_write( ber_pvt_sb_get_desc(c->c_sb), 1 );
 456                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 457         }
 458 }
 459
 460 static void connection_close( Connection *c )
 461 {
 462         assert( connections != NULL );
 463         assert( c != NULL );
 464         assert( c->c_struct_state == SLAP_C_USED );
 465         assert( c->c_conn_state == SLAP_C_CLOSING );
 466
 467         /* note: connections_mutex and c_mutex should be locked by caller */
 468
 469         if( c->c_ops != NULL ) {
 470                 Debug( LDAP_DEBUG_TRACE,
 471                         "connection_close: deferring conn=%ld sd=%d.\n",
 472                         c->c_connid, ber_pvt_sb_get_desc( c->c_sb ), 0 );
 473
 474                 return;
 475         }
 476
 477         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%ld sd=%d.\n",
 478                 c->c_connid, ber_pvt_sb_get_desc( c->c_sb ), 0 );
 479
 480         connection_destroy( c );
 481 }
 482
 483 long connections_nextid(void)
 484 {
 485         long id;
 486         assert( connections != NULL );
 487
 488         ldap_pvt_thread_mutex_lock( &connections_mutex );
 489
 490         id = conn_nextid;
 491
 492         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 493
 494         return id;
 495 }
 496
 497 Connection* connection_first( int *index )
 498 {
 499         assert( connections != NULL );
 500         assert( index != NULL );
 501
 502         ldap_pvt_thread_mutex_lock( &connections_mutex );
 503
 504         *index = 0;
 505
 506         return connection_next(NULL, index);
 507 }
 508
 509 Connection* connection_next( Connection *c, int *index )
 510 {
 511         assert( connections != NULL );
 512         assert( index != NULL );
 513         assert( *index <= dtblsize );
 514
 515         if( c != NULL ) {
 516                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 517         }
 518
 519         c = NULL;
 520
 521         for(; *index < dtblsize; (*index)++) {
 522                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 523                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 524 #ifndef HAVE_WINSOCK
 525                         continue;
 526 #else
 527                         break;
 528 #endif
 529                 }
 530
 531                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 532                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 533                         c = &connections[(*index)++];
 534                         break;
 535                 }
 536
 537                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 538                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 539         }
 540
 541         if( c != NULL ) {
 542                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 543         }
 544
 545         return c;
 546 }
 547
 548 void connection_done( Connection *c )
 549 {
 550         assert( connections != NULL );
 551
 552         if( c != NULL ) {
 553                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 554         }
 555
 556         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 557 }
 558
 559 /*
 560  * connection_activity - handle the request operation op on connection
 561  * conn.  This routine figures out what kind of operation it is and
 562  * calls the appropriate stub to handle it.
 563  */
 564
 565 static void *
 566 connection_operation( void *arg_v )
 567 {
 568         struct co_arg   *arg = arg_v;
 569         int tag = arg->co_op->o_tag;
 570         Connection *conn = arg->co_conn;
 571
 572 #ifdef LDAP_COUNTERS
 573         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 574         num_ops_initiated++;
 575         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 576 #endif
 577
 578         switch ( tag ) {
 579         case LDAP_REQ_BIND:
 580                 do_bind( conn, arg->co_op );
 581                 break;
 582
 583 #ifdef LDAP_COMPAT30
 584         case LDAP_REQ_UNBIND_30:
 585 #endif
 586         case LDAP_REQ_UNBIND:
 587                 do_unbind( conn, arg->co_op );
 588                 break;
 589
 590         case LDAP_REQ_ADD:
 591                 do_add( conn, arg->co_op );
 592                 break;
 593
 594 #ifdef LDAP_COMPAT30
 595         case LDAP_REQ_DELETE_30:
 596 #endif
 597         case LDAP_REQ_DELETE:
 598                 do_delete( conn, arg->co_op );
 599                 break;
 600
 601         case LDAP_REQ_MODRDN:
 602                 do_modrdn( conn, arg->co_op );
 603                 break;
 604
 605         case LDAP_REQ_MODIFY:
 606                 do_modify( conn, arg->co_op );
 607                 break;
 608
 609         case LDAP_REQ_COMPARE:
 610                 do_compare( conn, arg->co_op );
 611                 break;
 612
 613         case LDAP_REQ_SEARCH:
 614                 do_search( conn, arg->co_op );
 615                 break;
 616
 617 #ifdef LDAP_COMPAT30
 618         case LDAP_REQ_ABANDON_30:
 619 #endif
 620         case LDAP_REQ_ABANDON:
 621                 do_abandon( conn, arg->co_op );
 622                 break;
 623
 624         default:
 625                 Debug( LDAP_DEBUG_ANY, "unknown request 0x%lx\n",
 626                     arg->co_op->o_tag, 0, 0 );
 627                 break;
 628         }
 629
 630 #ifdef LDAP_COUNTERS
 631         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 632         num_ops_completed++;
 633         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 634 #endif
 635
 636         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
 637
 638 #ifdef LDAP_COUNTERS
 639         conn->c_n_ops_completed++;
 640 #endif
 641
 642         slap_op_remove( &conn->c_ops, arg->co_op );
 643         slap_op_free( arg->co_op );
 644         arg->co_op = NULL;
 645         arg->co_conn = NULL;
 646         free( (char *) arg );
 647         arg = NULL;
 648
 649         switch( tag ) {
 650 #ifdef LDAP_COMPAT30
 651         case LDAP_REQ_UNBIND_30:
 652 #endif
 653         case LDAP_REQ_UNBIND:
 654                 /* c_mutex is locked */
 655                 connection_closing( conn );
 656                 break;
 657
 658         case LDAP_REQ_BIND:
 659                 if( conn->c_conn_state == SLAP_C_BINDING) {
 660                         conn->c_conn_state = SLAP_C_ACTIVE;
 661                 }
 662         }
 663
 664         ldap_pvt_thread_mutex_lock( &active_threads_mutex );
 665         active_threads--;
 666         if( active_threads < 1 ) {
 667                 ldap_pvt_thread_cond_signal(&active_threads_cond);
 668         }
 669         ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
 670
 671         connection_resched( conn );
 672
 673         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
 674
 675         return NULL;
 676 }
 677
 678 int connection_read(int s)
 679 {
 680         int rc = 0;
 681         Connection *c;
 682         assert( connections != NULL );
 683
 684         ldap_pvt_thread_mutex_lock( &connections_mutex );
 685
 686         /* get (locked) connection */
 687         c = connection_get( s );
 688
 689         if( c == NULL ) {
 690                 Debug( LDAP_DEBUG_ANY,
 691                         "connection_read(%d): no connection!\n",
 692                         s, 0, 0 );
 693
 694                 slapd_remove(s, 0);
 695
 696                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 697                 return -1;
 698         }
 699
 700         if( c->c_conn_state == SLAP_C_CLOSING ) {
 701                 Debug( LDAP_DEBUG_TRACE,
 702                         "connection_read(%d): closing, ignoring input for id=%ld\n",
 703                         s, c->c_connid, 0 );
 704
 705                 connection_return( c );
 706                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 707                 return 0;
 708         }
 709
 710         Debug( LDAP_DEBUG_TRACE,
 711                 "connection_read(%d): checking for input on id=%ld\n",
 712                 s, c->c_connid, 0 );
 713
 714 #define CONNECTION_INPUT_LOOP 1
 715
 716 #ifdef DATA_READY_LOOP
 717         while(!rc && ber_pvt_sb_data_ready(&c->c_sb))
 718 #elif CONNECTION_INPUT_LOOP
 719         while(!rc)
 720 #endif
 721         {
 722                 rc = connection_input( c );
 723         }
 724
 725         if( rc < 0 ) {
 726                 Debug( LDAP_DEBUG_TRACE,
 727                         "connection_read(%d): input error=%d id=%ld, closing.\n",
 728                         s, rc, c->c_connid );
 729
 730                 /* connections_mutex and c_mutex are locked */
 731                 connection_closing( c );
 732                 connection_close( c );
 733         }
 734
 735         connection_return( c );
 736         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 737         return 0;
 738 }
 739
 740 static int
 741 connection_input(
 742     Connection *conn
 743 )
 744 {
 745         Operation *op;
 746         unsigned long   tag, len;
 747         long            msgid;
 748         BerElement      *ber;
 749
 750         if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
 751             == NULL ) {
 752                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
 753                 return -1;
 754         }
 755
 756         errno = 0;
 757         if ( (tag = ber_get_next( conn->c_sb, &len, conn->c_currentber ))
 758             != LDAP_TAG_MESSAGE )
 759         {
 760                 int err = errno;
 761
 762                 Debug( LDAP_DEBUG_TRACE,
 763                         "ber_get_next on fd %d failed errno %d (%s)\n",
 764                         ber_pvt_sb_get_desc( conn->c_sb ), err,
 765                         err > -1 && err < sys_nerr ?  sys_errlist[err] : "unknown" );
 766                 Debug( LDAP_DEBUG_TRACE,
 767                         "\t*** got %ld of %lu so far\n",
 768                         (long)(conn->c_currentber->ber_rwptr - conn->c_currentber->ber_buf),
 769                         conn->c_currentber->ber_len, 0 );
 770
 771                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
 772                         /* log, close and send error */
 773                         ber_free( conn->c_currentber, 1 );
 774                         conn->c_currentber = NULL;
 775
 776                         return -2;
 777                 }
 778                 return 1;
 779         }
 780
 781         ber = conn->c_currentber;
 782         conn->c_currentber = NULL;
 783
 784         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
 785                 /* log, close and send error */
 786                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
 787                     0 );
 788                 ber_free( ber, 1 );
 789                 return -1;
 790         }
 791
 792         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
 793                 /* log, close and send error */
 794                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
 795                     0 );
 796                 ber_free( ber, 1 );
 797
 798                 return -1;
 799         }
 800
 801 #ifdef LDAP_COMPAT30
 802         if ( conn->c_version == 30 ) {
 803                 (void) ber_skip_tag( ber, &len );
 804         }
 805 #endif
 806
 807         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
 808
 809         if ( conn->c_conn_state == SLAP_C_BINDING
 810                 || conn->c_conn_state == SLAP_C_CLOSING )
 811         {
 812                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
 813                 slap_op_add( &conn->c_pending_ops, op );
 814
 815         } else {
 816                 connection_op_activate( conn, op );
 817         }
 818
 819 #ifdef NO_THREADS
 820         if ( conn->c_struct_state != SLAP_C_USED ) {
 821                 /* connection must have got closed underneath us */
 822                 return 1;
 823         }
 824 #endif
 825         assert( conn->c_struct_state == SLAP_C_USED );
 826
 827         return 0;
 828 }
 829
 830 static int
 831 connection_resched( Connection *conn )
 832 {
 833         Operation *op;
 834
 835         if( conn->c_conn_state == SLAP_C_CLOSING ) {
 836                 Debug( LDAP_DEBUG_TRACE,
 837                         "connection_resched: attempting closing conn=%ld sd=%d.\n",
 838                         conn->c_connid, ber_pvt_sb_get_desc( conn->c_sb ), 0 );
 839
 840                 connection_close( conn );
 841                 return 0;
 842         }
 843
 844         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
 845                 /* other states need different handling */
 846                 return 0;
 847         }
 848
 849         for( op = slap_op_pop( &conn->c_pending_ops );
 850                 op != NULL;
 851                 op = slap_op_pop( &conn->c_pending_ops ) )
 852         {
 853                 /* pending operations should not be marked for abandonment */
 854                 assert(!op->o_abandon);
 855
 856                 connection_op_activate( conn, op );
 857
 858                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
 859                         break;
 860                 }
 861         }
 862         return 0;
 863 }
 864
 865 static int connection_op_activate( Connection *conn, Operation *op )
 866 {
 867         struct co_arg *arg;
 868         char *tmpdn;
 869         int status;
 870         unsigned long tag = op->o_tag;
 871
 872         if ( conn->c_dn != NULL ) {
 873                 tmpdn = ch_strdup( conn->c_dn );
 874         } else {
 875                 tmpdn = NULL;
 876         }
 877
 878         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
 879         arg->co_conn = conn;
 880         arg->co_op = op;
 881
 882         arg->co_op->o_dn = ch_strdup( tmpdn != NULL ? tmpdn : "" );
 883         arg->co_op->o_ndn = dn_normalize_case( ch_strdup( arg->co_op->o_dn ) );
 884
 885         slap_op_add( &conn->c_ops, arg->co_op );
 886
 887         if(tag == LDAP_REQ_BIND) {
 888                 conn->c_conn_state = SLAP_C_BINDING;
 889         }
 890
 891         if ( tmpdn != NULL ) {
 892                 free( tmpdn );
 893         }
 894
 895         ldap_pvt_thread_mutex_lock( &active_threads_mutex );
 896         active_threads++;
 897         ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
 898
 899         status = ldap_pvt_thread_create( &arg->co_op->o_tid, 1,
 900                                          connection_operation, (void *) arg );
 901
 902         if ( status != 0 ) {
 903                 Debug( LDAP_DEBUG_ANY,
 904                 "ldap_pvt_thread_create failed (%d)\n", status, 0, 0 );
 905
 906                 /* should move op to pending list */
 907         }
 908
 909         return status;
 910 }
 911
 912 int connection_write(int s)
 913 {
 914         Connection *c;
 915         assert( connections != NULL );
 916
 917         ldap_pvt_thread_mutex_lock( &connections_mutex );
 918
 919         c = connection_get( s );
 920
 921         slapd_clr_write( s, 0);
 922
 923         if( c == NULL ) {
 924                 Debug( LDAP_DEBUG_ANY,
 925                         "connection_write(%d): no connection!\n",
 926                         s, 0, 0 );
 927                 slapd_remove(s, 0);
 928                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 929                 return -1;
 930         }
 931
 932         Debug( LDAP_DEBUG_TRACE,
 933                 "connection_write(%d): waking output for id=%ld\n",
 934                 s, c->c_connid, 0 );
 935
 936         ldap_pvt_thread_cond_signal( &c->c_write_cv );
 937
 938         connection_return( c );
 939         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 940         return 0;
 941 }