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

   1 #include "portable.h"
   2
   3 #include <stdio.h>
   4
   5 #include <ac/errno.h>
   6 #include <ac/signal.h>
   7 #include <ac/socket.h>
   8 #include <ac/string.h>
   9 #include <ac/time.h>
  10
  11 #include "slap.h"
  12
  13 #ifdef HAVE_WINSOCK
  14 #define EWOULDBLOCK WSAEWOULDBLOCK
  15 #endif
  16
  17 /* protected by connections_mutex */
  18 static ldap_pvt_thread_mutex_t connections_mutex;
  19 static Connection *connections = NULL;
  20 static int conn_index = -1;
  21 static long conn_nextid = 0;
  22
  23 /* structure state (protected by connections_mutex) */
  24 #define SLAP_C_UNINITIALIZED    0x0     /* MUST BE ZERO (0) */
  25 #define SLAP_C_UNUSED                   0x1
  26 #define SLAP_C_USED                             0x2
  27
  28 /* connection state (protected by c_mutex ) */
  29 #define SLAP_C_INVALID                  0x0     /* MUST BE ZERO (0) */
  30 #define SLAP_C_INACTIVE                 0x1     /* zero threads */
  31 #define SLAP_C_ACTIVE                   0x2 /* one or more threads */
  32 #define SLAP_C_BINDING                  0x3     /* binding */
  33 #define SLAP_C_CLOSING                  0x4     /* closing */
  34
  35 void slapd_remove(int s);
  36 static Connection* connection_get( int s );
  37
  38 static int connection_input( Connection *c );
  39
  40 static int connection_op_activate( Connection *conn, Operation *op );
  41 static int connection_resched( Connection *conn );
  42
  43 struct co_arg {
  44         Connection      *co_conn;
  45         Operation       *co_op;
  46 };
  47
  48 /*
  49  * Initialize connection management infrastructure.
  50  */
  51 int connections_init(void)
  52 {
  53         int i;
  54
  55         assert( connections == NULL );
  56
  57         if( connections != NULL) { /* probably should assert this */
  58                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
  59                         0, 0, 0 );
  60                 return -1;
  61         }
  62
  63         /* should check return of every call */
  64         ldap_pvt_thread_mutex_init( &connections_mutex );
  65
  66         connections = (Connection *) calloc( dtblsize, sizeof(Connection) );
  67
  68         if( connections == NULL ) {
  69                 Debug( LDAP_DEBUG_ANY,
  70                         "connections_init: allocation (%d*%ld) of connection array failed.\n",
  71                         dtblsize, (long) sizeof(Connection), 0 );
  72                 return -1;
  73         }
  74
  75         for ( i = 0; i < dtblsize; i++ )
  76                 memset( &connections[i], 0, sizeof(Connection) );
  77
  78         /*
  79          * per entry initialization of the Connection array initialization
  80          * will be done by connection_init()
  81          */
  82
  83         return 0;
  84 }
  85
  86 static Connection* connection_get( int s )
  87 {
  88         Connection *c = NULL;
  89
  90         assert( connections != NULL );
  91
  92         if(s < 0) {
  93                 return NULL;
  94         }
  95
  96 #ifndef HAVE_WINSOCK
  97         assert( connections[s].c_struct_state == SLAP_C_USED );
  98         assert( connections[s].c_conn_state != SLAP_C_INVALID );
  99         assert( connections[s].c_sb.sb_sd != -1 );
 100
 101         c = &connections[s];
 102 #else
 103         {
 104                 int i;
 105
 106                 for(i=0; i<dtblsize; i++) {
 107                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 108                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 109                                 assert( connections[i].c_sb.sb_sd == 0 );
 110                                 break;
 111                         }
 112
 113                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 114                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 115                                 assert( connections[i].c_sb.sb_sd == -1 );
 116                                 continue;
 117                         }
 118
 119                         assert( connections[i].c_struct_state == SLAP_C_USED );
 120                         assert( connections[i].c_conn_state != SLAP_C_INVALID );
 121                         assert( connections[i].c_sb.sb_sd != -1 );
 122
 123                         if( connections[i].c_sb.sb_sd == s ) {
 124                                 c = &connections[i];
 125                                 break;
 126                         }
 127                 }
 128         }
 129 #endif
 130
 131         if( c != NULL ) {
 132                 /* we do this BEFORE locking to aid in debugging */
 133                 Debug( LDAP_DEBUG_TRACE,
 134                         "connection_get(%d): got connid=%ld\n",
 135                         s, c->c_connid, 0 );
 136
 137                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 138         }
 139         return c;
 140 }
 141
 142 static void connection_return( Connection *c )
 143 {
 144         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 145 }
 146
 147 long connection_init(
 148         int s,
 149         const char* name,
 150         const char* addr)
 151 {
 152         long id;
 153         Connection *c;
 154         assert( connections != NULL );
 155
 156         if( s < 0 ) {
 157                 return -1;
 158         }
 159
 160         assert( s >= 0 );
 161 #ifndef HAVE_WINSOCK
 162         assert( s < dtblsize );
 163 #endif
 164
 165         ldap_pvt_thread_mutex_lock( &connections_mutex );
 166
 167 #ifndef HAVE_WINSOCK
 168         c = &connections[s];
 169
 170 #else
 171         {
 172                 int i;
 173
 174         for( i=0; i < dtblsize; i++) {
 175             if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 176                 assert( connections[i].c_sb.sb_sd == 0 );
 177                 c = &connections[i];
 178                 break;
 179             }
 180
 181             if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 182                 assert( connections[i].c_sb.sb_sd == -1 );
 183                 c = &connections[i];
 184                 break;
 185             }
 186
 187             assert( connections[i].c_struct_state == SLAP_C_USED );
 188             assert( connections[i].c_conn_state != SLAP_C_INVALID );
 189             assert( connections[i].c_sb.sb_sd != -1 );
 190         }
 191
 192         if( c == NULL ) {
 193             ldap_pvt_thread_mutex_unlock( &connections_mutex );
 194             return -1;
 195         }
 196     }
 197 #endif
 198
 199     assert( c != NULL );
 200     assert( c->c_struct_state != SLAP_C_USED );
 201     assert( c->c_conn_state == SLAP_C_INVALID );
 202
 203     if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 204         c->c_dn = NULL;
 205         c->c_cdn = NULL;
 206         c->c_client_name = NULL;
 207         c->c_client_addr = NULL;
 208         c->c_ops = NULL;
 209         c->c_pending_ops = NULL;
 210
 211         lber_pvt_sb_init( &c->c_sb );
 212
 213         /* should check status of thread calls */
 214         ldap_pvt_thread_mutex_init( &c->c_mutex );
 215         ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 216         ldap_pvt_thread_cond_init( &c->c_write_cv );
 217
 218         c->c_struct_state = SLAP_C_UNUSED;
 219     }
 220
 221     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 222
 223     assert( c->c_struct_state == SLAP_C_UNUSED );
 224     assert(     c->c_dn == NULL );
 225     assert(     c->c_cdn == NULL );
 226     assert( c->c_client_name == NULL );
 227     assert( c->c_client_addr == NULL );
 228     assert( c->c_ops == NULL );
 229     assert( c->c_pending_ops == NULL );
 230
 231     c->c_client_name = ch_strdup( name == NULL ? "" : name );
 232     c->c_client_addr = ch_strdup( addr );
 233
 234     c->c_n_ops_received = 0;
 235 #ifdef LDAP_COUNTERS
 236     c->c_n_ops_executing = 0;
 237     c->c_n_ops_pending = 0;
 238     c->c_n_ops_completed = 0;
 239 #endif
 240
 241     c->c_starttime = slap_get_time();
 242
 243     lber_pvt_sb_set_desc( &c->c_sb, s );
 244     lber_pvt_sb_set_io( &c->c_sb, &lber_pvt_sb_io_tcp, NULL );
 245
 246     if( lber_pvt_sb_set_nonblock( &c->c_sb, 1 ) < 0 ) {
 247         Debug( LDAP_DEBUG_ANY,
 248             "connection_init(%d, %s, %s): set nonblocking failed\n",
 249             s, c->c_client_name, c->c_client_addr);
 250     }
 251
 252     id = c->c_connid = conn_nextid++;
 253
 254     c->c_conn_state = SLAP_C_INACTIVE;
 255     c->c_struct_state = SLAP_C_USED;
 256
 257     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 258     ldap_pvt_thread_mutex_unlock( &connections_mutex );
 259
 260     return id;
 261 }
 262
 263 static void
 264 connection_destroy( Connection *c )
 265 {
 266     assert( connections != NULL );
 267     assert( c != NULL );
 268     assert( c->c_struct_state != SLAP_C_UNUSED );
 269     assert( c->c_conn_state != SLAP_C_INVALID );
 270     assert( c->c_ops == NULL );
 271
 272     c->c_struct_state = SLAP_C_UNUSED;
 273     c->c_conn_state = SLAP_C_INVALID;
 274
 275     c->c_version = 0;
 276     c->c_protocol = 0;
 277
 278     c->c_starttime = 0;
 279
 280     if(c->c_dn != NULL) {
 281         free(c->c_dn);
 282         c->c_dn = NULL;
 283     }
 284         if(c->c_cdn != NULL) {
 285                 free(c->c_cdn);
 286                 c->c_cdn = NULL;
 287         }
 288         if(c->c_client_name != NULL) {
 289                 free(c->c_client_name);
 290                 c->c_client_name = NULL;
 291         }
 292         if(c->c_client_addr != NULL) {
 293                 free(c->c_client_addr);
 294                 c->c_client_addr = NULL;
 295         }
 296
 297         if ( lber_pvt_sb_in_use(&c->c_sb) ) {
 298                 int sd = lber_pvt_sb_get_desc(&c->c_sb);
 299
 300                 slapd_remove( sd );
 301                 lber_pvt_sb_close( &c->c_sb );
 302
 303                 Statslog( LDAP_DEBUG_STATS,
 304                     "conn=%d fd=%d closed.\n",
 305                         c->c_connid, sd, 0, 0, 0 );
 306         }
 307
 308         lber_pvt_sb_destroy( &c->c_sb );
 309 }
 310
 311 void connection_closing( Connection *c )
 312 {
 313         assert( connections != NULL );
 314         assert( c != NULL );
 315         assert( c->c_struct_state == SLAP_C_USED );
 316         assert( c->c_conn_state != SLAP_C_INVALID );
 317
 318         if( c->c_conn_state != SLAP_C_CLOSING ) {
 319                 /* don't listen on this port anymore */
 320                 slapd_clr_read( c->c_sb.sb_sd, 1 );
 321                 c->c_conn_state = SLAP_C_CLOSING;
 322         }
 323 }
 324
 325 static void connection_close( Connection *c )
 326 {
 327         assert( connections != NULL );
 328         assert( c != NULL );
 329         assert( c->c_struct_state == SLAP_C_USED );
 330         assert( c->c_conn_state == SLAP_C_CLOSING );
 331
 332         if( c->c_ops != NULL ) {
 333                 Debug( LDAP_DEBUG_TRACE,
 334                         "connection_close: deferring conn=%ld sd=%d.\n",
 335                         c->c_connid, c->c_sb.sb_sd, 0 );
 336
 337                 return;
 338         }
 339
 340         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%ld sd=%d.\n",
 341                 c->c_connid, c->c_sb.sb_sd, 0 );
 342
 343         connection_destroy( c );
 344 }
 345
 346 long connections_nextid(void)
 347 {
 348         long id;
 349         assert( connections != NULL );
 350
 351         ldap_pvt_thread_mutex_lock( &connections_mutex );
 352
 353         id = conn_nextid;
 354
 355         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 356
 357         return id;
 358 }
 359
 360 Connection* connection_first(void)
 361 {
 362         assert( connections != NULL );
 363
 364         ldap_pvt_thread_mutex_lock( &connections_mutex );
 365
 366         assert( conn_index == -1 );
 367         conn_index = 0;
 368
 369         return connection_next(NULL);
 370 }
 371
 372 Connection* connection_next(Connection *c)
 373 {
 374         assert( connections != NULL );
 375         assert( conn_index != -1 );
 376         assert( conn_index <= dtblsize );
 377
 378         if( c != NULL ) {
 379                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 380         }
 381
 382         c = NULL;
 383
 384         for(; conn_index < dtblsize; conn_index++) {
 385                 if( connections[conn_index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 386                         assert( connections[conn_index].c_conn_state == SLAP_C_INVALID );
 387 #ifndef HAVE_WINSOCK
 388                         continue;
 389 #else
 390                         break;
 391 #endif
 392                 }
 393
 394                 if( connections[conn_index].c_struct_state == SLAP_C_USED ) {
 395                         assert( connections[conn_index].c_conn_state != SLAP_C_INVALID );
 396                         c = &connections[conn_index++];
 397                         break;
 398                 }
 399
 400                 assert( connections[conn_index].c_struct_state == SLAP_C_UNUSED );
 401                 assert( connections[conn_index].c_conn_state == SLAP_C_INVALID );
 402         }
 403
 404         if( c != NULL ) {
 405                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 406         }
 407
 408         return c;
 409 }
 410
 411 void connection_done(Connection *c)
 412 {
 413         assert( connections != NULL );
 414         assert( conn_index != -1 );
 415         assert( conn_index <= dtblsize );
 416
 417         if( c != NULL ) {
 418                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 419         }
 420
 421         conn_index = -1;
 422         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 423 }
 424
 425 /*
 426  * connection_activity - handle the request operation op on connection
 427  * conn.  This routine figures out what kind of operation it is and
 428  * calls the appropriate stub to handle it.
 429  */
 430
 431 static void *
 432 connection_operation( void *arg_v )
 433 {
 434         struct co_arg   *arg = arg_v;
 435         int tag = arg->co_op->o_tag;
 436         Connection *conn = arg->co_conn;
 437
 438 #ifdef LDAP_COUNTERS
 439         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 440         num_ops_initiated++;
 441         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 442 #endif
 443
 444         switch ( tag ) {
 445         case LDAP_REQ_BIND:
 446                 do_bind( conn, arg->co_op );
 447                 break;
 448
 449 #ifdef LDAP_COMPAT30
 450         case LDAP_REQ_UNBIND_30:
 451 #endif
 452         case LDAP_REQ_UNBIND:
 453                 do_unbind( conn, arg->co_op );
 454                 break;
 455
 456         case LDAP_REQ_ADD:
 457                 do_add( conn, arg->co_op );
 458                 break;
 459
 460 #ifdef LDAP_COMPAT30
 461         case LDAP_REQ_DELETE_30:
 462 #endif
 463         case LDAP_REQ_DELETE:
 464                 do_delete( conn, arg->co_op );
 465                 break;
 466
 467         case LDAP_REQ_MODRDN:
 468                 do_modrdn( conn, arg->co_op );
 469                 break;
 470
 471         case LDAP_REQ_MODIFY:
 472                 do_modify( conn, arg->co_op );
 473                 break;
 474
 475         case LDAP_REQ_COMPARE:
 476                 do_compare( conn, arg->co_op );
 477                 break;
 478
 479         case LDAP_REQ_SEARCH:
 480                 do_search( conn, arg->co_op );
 481                 break;
 482
 483 #ifdef LDAP_COMPAT30
 484         case LDAP_REQ_ABANDON_30:
 485 #endif
 486         case LDAP_REQ_ABANDON:
 487                 do_abandon( conn, arg->co_op );
 488                 break;
 489
 490         default:
 491                 Debug( LDAP_DEBUG_ANY, "unknown request 0x%lx\n",
 492                     arg->co_op->o_tag, 0, 0 );
 493                 break;
 494         }
 495
 496 #ifdef LDAP_COUNTERS
 497         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 498         num_ops_completed++;
 499         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 500 #endif
 501
 502         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
 503
 504 #ifdef LDAP_COUNTERS
 505         conn->c_n_ops_completed++;
 506 #endif
 507
 508         slap_op_remove( &conn->c_ops, arg->co_op );
 509         slap_op_free( arg->co_op );
 510         arg->co_op = NULL;
 511         arg->co_conn = NULL;
 512         free( (char *) arg );
 513         arg = NULL;
 514
 515         switch( tag ) {
 516 #ifdef LDAP_COMPAT30
 517         case LDAP_REQ_UNBIND_30:
 518 #endif
 519         case LDAP_REQ_UNBIND:
 520                 connection_closing( conn );
 521                 break;
 522
 523         case LDAP_REQ_BIND:
 524                 if( conn->c_conn_state == SLAP_C_BINDING) {
 525                         conn->c_conn_state = SLAP_C_ACTIVE;
 526                 }
 527         }
 528
 529         if( conn->c_conn_state == SLAP_C_CLOSING ) {
 530                 Debug( LDAP_DEBUG_TRACE,
 531                         "connection_operation: attempting closing conn=%ld sd=%d.\n",
 532                         conn->c_connid, conn->c_sb.sb_sd, 0 );
 533
 534                 connection_close( conn );
 535         }
 536
 537         ldap_pvt_thread_mutex_lock( &active_threads_mutex );
 538         active_threads--;
 539         if( active_threads < 1 ) {
 540                 ldap_pvt_thread_cond_signal(&active_threads_cond);
 541         }
 542         ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
 543
 544         connection_resched( conn );
 545
 546         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
 547
 548         return NULL;
 549 }
 550
 551 int connection_read(int s)
 552 {
 553         int rc = 0;
 554         Connection *c;
 555         assert( connections != NULL );
 556
 557         ldap_pvt_thread_mutex_lock( &connections_mutex );
 558
 559         c = connection_get( s );
 560         if( c == NULL ) {
 561                 Debug( LDAP_DEBUG_ANY,
 562                         "connection_read(%d): no connection!\n",
 563                         s, 0, 0 );
 564                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 565                 return -1;
 566         }
 567
 568         if( c->c_conn_state == SLAP_C_CLOSING ) {
 569                 Debug( LDAP_DEBUG_TRACE,
 570                         "connection_read(%d): closing, ignoring input for id=%ld\n",
 571                         s, c->c_connid, 0 );
 572
 573                 connection_return( c );
 574                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 575                 return 0;
 576         }
 577
 578         Debug( LDAP_DEBUG_TRACE,
 579                 "connection_read(%d): checking for input on id=%ld\n",
 580                 s, c->c_connid, 0 );
 581
 582 #define CONNECTION_INPUT_LOOP 1
 583
 584 #ifdef DATA_READY_LOOP
 585         while(!rc && lber_pvt_sb_data_ready(&c->c_sb))
 586 #elif CONNECTION_INPUT_LOOP
 587         while(!rc)
 588 #endif
 589         {
 590                 rc = connection_input( c );
 591         }
 592
 593         if( rc < 0 ) {
 594                 Debug( LDAP_DEBUG_TRACE,
 595                         "connection_read(%d): input error=%d id=%ld, closing.\n",
 596                         s, rc, c->c_connid );
 597
 598                 connection_closing( c );
 599                 connection_close( c );
 600         }
 601
 602         connection_return( c );
 603         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 604         return 0;
 605 }
 606
 607 static int
 608 connection_input(
 609     Connection *conn
 610 )
 611 {
 612         Operation *op;
 613         unsigned long   tag, len;
 614         long            msgid;
 615         BerElement      *ber;
 616
 617         if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
 618             == NULL ) {
 619                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
 620                 return -1;
 621         }
 622
 623         errno = 0;
 624         if ( (tag = ber_get_next( &conn->c_sb, &len, conn->c_currentber ))
 625             != LDAP_TAG_MESSAGE )
 626         {
 627                 int err = errno;
 628
 629                 Debug( LDAP_DEBUG_TRACE,
 630                         "ber_get_next on fd %d failed errno %d (%s)\n",
 631                         lber_pvt_sb_get_desc(&conn->c_sb), err,
 632                         err > -1 && err < sys_nerr ?  sys_errlist[err] : "unknown" );
 633                 Debug( LDAP_DEBUG_TRACE,
 634                         "\t*** got %ld of %lu so far\n",
 635                         (long)(conn->c_currentber->ber_rwptr - conn->c_currentber->ber_buf),
 636                         conn->c_currentber->ber_len, 0 );
 637
 638                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
 639                         /* log, close and send error */
 640                         ber_free( conn->c_currentber, 1 );
 641                         conn->c_currentber = NULL;
 642
 643                         return -2;
 644                 }
 645                 return 1;
 646         }
 647
 648         ber = conn->c_currentber;
 649         conn->c_currentber = NULL;
 650
 651         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
 652                 /* log, close and send error */
 653                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
 654                     0 );
 655                 ber_free( ber, 1 );
 656                 return -1;
 657         }
 658
 659         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
 660                 /* log, close and send error */
 661                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
 662                     0 );
 663                 ber_free( ber, 1 );
 664
 665                 return -1;
 666         }
 667
 668 #ifdef LDAP_COMPAT30
 669         if ( conn->c_version == 30 ) {
 670                 (void) ber_skip_tag( ber, &len );
 671         }
 672 #endif
 673
 674         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
 675
 676         if ( conn->c_conn_state == SLAP_C_BINDING
 677                 || conn->c_conn_state == SLAP_C_CLOSING )
 678         {
 679                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
 680                 slap_op_add( &conn->c_pending_ops, op );
 681
 682         } else {
 683                 connection_op_activate( conn, op );
 684         }
 685
 686 #ifdef NO_THREADS
 687         if ( conn->c_struct_state != SLAP_C_USED ) {
 688                 /* connection must have got closed underneath us */
 689                 return 1;
 690         }
 691 #endif
 692         assert( conn->c_struct_state == SLAP_C_USED );
 693
 694         return 0;
 695 }
 696
 697 static int
 698 connection_resched( Connection *conn )
 699 {
 700         Operation *op;
 701
 702         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
 703                 /* other states need different handling */
 704                 return 0;
 705         }
 706
 707         for( op = slap_op_pop( &conn->c_pending_ops );
 708                 op != NULL;
 709                 op = slap_op_pop( &conn->c_pending_ops ) )
 710         {
 711                 connection_op_activate( conn, op );
 712
 713                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
 714                         break;
 715                 }
 716         }
 717         return 0;
 718 }
 719
 720 static int connection_op_activate( Connection *conn, Operation *op )
 721 {
 722         struct co_arg *arg;
 723         char *tmpdn;
 724         int status;
 725         unsigned long tag = op->o_tag;
 726
 727         if ( conn->c_dn != NULL ) {
 728                 tmpdn = ch_strdup( conn->c_dn );
 729         } else {
 730                 tmpdn = NULL;
 731         }
 732
 733         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
 734         arg->co_conn = conn;
 735         arg->co_op = op;
 736
 737         arg->co_op->o_dn = ch_strdup( tmpdn != NULL ? tmpdn : "" );
 738         arg->co_op->o_ndn = dn_normalize_case( ch_strdup( arg->co_op->o_dn ) );
 739
 740         slap_op_add( &conn->c_ops, arg->co_op );
 741
 742         if(tag == LDAP_REQ_BIND) {
 743                 conn->c_conn_state = SLAP_C_BINDING;
 744         }
 745
 746         if ( tmpdn != NULL ) {
 747                 free( tmpdn );
 748         }
 749
 750         ldap_pvt_thread_mutex_lock( &active_threads_mutex );
 751         active_threads++;
 752         ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
 753
 754         status = ldap_pvt_thread_create( &arg->co_op->o_tid, 1,
 755                                          connection_operation, (void *) arg );
 756
 757         if ( status != 0 ) {
 758                 Debug( LDAP_DEBUG_ANY,
 759                 "ldap_pvt_thread_create failed (%d)\n", status, 0, 0 );
 760
 761                 /* should move op to pending list */
 762         }
 763
 764         return status;
 765 }
 766
 767 int connection_write(int s)
 768 {
 769         Connection *c;
 770         assert( connections != NULL );
 771
 772         ldap_pvt_thread_mutex_lock( &connections_mutex );
 773
 774         c = connection_get( s );
 775         if( c == NULL ) {
 776                 Debug( LDAP_DEBUG_ANY,
 777                         "connection_write(%d): no connection!\n",
 778                         s, 0, 0 );
 779                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 780                 return -1;
 781         }
 782
 783         Debug( LDAP_DEBUG_TRACE,
 784                 "connection_write(%d): waking output for id=%ld\n",
 785                 s, c->c_connid, 0 );
 786
 787         ldap_pvt_thread_cond_signal( &c->c_write_cv );
 788
 789         connection_return( c );
 790         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 791         return 0;
 792 }