git.sur5r.net Git - openldap/blob - 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 struct co_arg {
  64         Connection      *co_conn;
  65         Operation       *co_op;
  66 };
  67
  68 /*
  69  * Initialize connection management infrastructure.
  70  */
  71 int connections_init(void)
  72 {
  73         assert( connections == NULL );
  74
  75         if( connections != NULL) {
  76 #ifdef NEW_LOGGING
  77                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
  78                            "connections_init:  already initialized.\n" ));
  79 #else
  80                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
  81                         0, 0, 0 );
  82 #endif
  83                 return -1;
  84         }
  85
  86         /* should check return of every call */
  87         ldap_pvt_thread_mutex_init( &connections_mutex );
  88
  89         connections = (Connection *) calloc( dtblsize, sizeof(Connection) );
  90
  91         if( connections == NULL ) {
  92 #ifdef NEW_LOGGING
  93                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
  94                            "connections_init: allocation (%d * %ld) of connection array failed\n",
  95                            dtblsize, (long) sizeof(Connection) ));
  96 #else
  97                 Debug( LDAP_DEBUG_ANY,
  98                         "connections_init: allocation (%d*%ld) of connection array failed\n",
  99                         dtblsize, (long) sizeof(Connection), 0 );
 100 #endif
 101                 return -1;
 102         }
 103
 104     assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
 105     assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 106
 107         /*
 108          * per entry initialization of the Connection array initialization
 109          * will be done by connection_init()
 110          */
 111
 112         return 0;
 113 }
 114
 115 /*
 116  * Destroy connection management infrastructure.
 117  */
 118 int connections_destroy(void)
 119 {
 120         ber_socket_t i;
 121
 122         /* should check return of every call */
 123
 124         if( connections == NULL) {
 125 #ifdef NEW_LOGGING
 126                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 127                            "connections_destroy: nothing to destroy.\n"));
 128 #else
 129                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
 130                         0, 0, 0 );
 131 #endif
 132                 return -1;
 133         }
 134
 135         for ( i = 0; i < dtblsize; i++ ) {
 136                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 137                         ber_sockbuf_free( connections[i].c_sb );
 138                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 139                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
 140                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 141                 }
 142         }
 143
 144         free( connections );
 145         connections = NULL;
 146
 147         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 148         return 0;
 149 }
 150
 151 /*
 152  * shutdown all connections
 153  */
 154 int connections_shutdown(void)
 155 {
 156         ber_socket_t i;
 157
 158         ldap_pvt_thread_mutex_lock( &connections_mutex );
 159
 160         for ( i = 0; i < dtblsize; i++ ) {
 161                 if( connections[i].c_struct_state != SLAP_C_USED ) {
 162                         continue;
 163                 }
 164
 165                 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 166
 167                 /* connections_mutex and c_mutex are locked */
 168                 connection_closing( &connections[i] );
 169                 connection_close( &connections[i] );
 170
 171                 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 172         }
 173
 174         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 175
 176         return 0;
 177 }
 178
 179 /*
 180  * Timeout idle connections.
 181  */
 182 int connections_timeout_idle(time_t now)
 183 {
 184         int i = 0;
 185         int connindex;
 186         Connection* c;
 187
 188         for( c = connection_first( &connindex );
 189                 c != NULL;
 190                 c = connection_next( c, &connindex ) )
 191         {
 192                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 193                         /* close it */
 194                         connection_closing( c );
 195                         connection_close( c );
 196                         i++;
 197                 }
 198         }
 199         connection_done( c );
 200
 201         return i;
 202 }
 203
 204 static Connection* connection_get( ber_socket_t s )
 205 {
 206         /* connections_mutex should be locked by caller */
 207
 208         Connection *c;
 209
 210 #ifdef NEW_LOGGING
 211         LDAP_LOG(( "connection", LDAP_LEVEL_ENTRY,
 212                    "connection_get: socket %ld\n", (long)s ));
 213 #else
 214         Debug( LDAP_DEBUG_ARGS,
 215                 "connection_get(%ld)\n",
 216                 (long) s, 0, 0 );
 217 #endif
 218
 219         assert( connections != NULL );
 220
 221         if(s == AC_SOCKET_INVALID) {
 222                 return NULL;
 223         }
 224
 225 #ifndef HAVE_WINSOCK
 226         c = &connections[s];
 227
 228         assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 229
 230 #else
 231         c = NULL;
 232         {
 233                 ber_socket_t i, sd;
 234
 235                 for(i=0; i<dtblsize; i++) {
 236                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 237                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 238                                 assert( connections[i].c_sb == 0 );
 239                                 break;
 240                         }
 241
 242                         ber_sockbuf_ctrl( connections[i].c_sb,
 243                                 LBER_SB_OPT_GET_FD, &sd );
 244
 245                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 246                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 247                                 assert( sd == AC_SOCKET_INVALID );
 248                                 continue;
 249                         }
 250
 251                         /* state can actually change from used -> unused by resched,
 252                          * so don't assert details here.
 253                          */
 254
 255                         if( sd == s ) {
 256                                 c = &connections[i];
 257                                 break;
 258                         }
 259                 }
 260         }
 261 #endif
 262
 263         if( c != NULL ) {
 264                 ber_socket_t    sd;
 265
 266                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 267
 268                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 269                 if( c->c_struct_state != SLAP_C_USED ) {
 270                         /* connection must have been closed due to resched */
 271
 272                         assert( c->c_conn_state == SLAP_C_INVALID );
 273                         assert( sd == AC_SOCKET_INVALID );
 274
 275 #ifdef NEW_LOGGING
 276                         LDAP_LOG(( "connection", LDAP_LEVEL_ARGS,
 277                                    "connection_get:  connection %d not used\n", s ));
 278 #else
 279                         Debug( LDAP_DEBUG_TRACE,
 280                                 "connection_get(%d): connection not used\n",
 281                                 s, 0, 0 );
 282 #endif
 283
 284                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 285                         return NULL;
 286                 }
 287
 288 #ifdef NEW_LOGGING
 289                 LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
 290                            "connection_get: get for %d got connid %lu\n", s, c->c_connid ));
 291 #else
 292                 Debug( LDAP_DEBUG_TRACE,
 293                         "connection_get(%d): got connid=%lu\n",
 294                         s, c->c_connid, 0 );
 295 #endif
 296
 297                 c->c_n_get++;
 298
 299                 assert( c->c_struct_state == SLAP_C_USED );
 300                 assert( c->c_conn_state != SLAP_C_INVALID );
 301                 assert( sd != AC_SOCKET_INVALID );
 302
 303 #ifdef SLAPD_MONITOR
 304                 c->c_activitytime = slap_get_time();
 305 #else
 306                 if( global_idletimeout > 0 ) {
 307                         c->c_activitytime = slap_get_time();
 308                 }
 309 #endif
 310         }
 311
 312         return c;
 313 }
 314
 315 static void connection_return( Connection *c )
 316 {
 317         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 318 }
 319
 320 long connection_init(
 321         ber_socket_t s,
 322         const char* url,
 323         const char* dnsname,
 324         const char* peername,
 325         const char* sockname,
 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( dnsname != NULL );
 336         assert( peername != NULL );
 337         assert( sockname != 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", LDAP_LEVEL_INFO,
 346                            "connection_init: init of socket %ld invalid.\n", (long)s ));
 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", LDAP_LEVEL_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_cdn.bv_val = NULL;
 421                 c->c_cdn.bv_len = 0;
 422                 c->c_groups = NULL;
 423
 424                 c->c_listener_url.bv_val = NULL;
 425                 c->c_listener_url.bv_len = 0;
 426                 c->c_peer_domain.bv_val = NULL;
 427                 c->c_peer_domain.bv_len = 0;
 428                 c->c_peer_name.bv_val = NULL;
 429                 c->c_peer_name.bv_len = 0;
 430                 c->c_sock_name.bv_val = NULL;
 431                 c->c_sock_name.bv_len = 0;
 432
 433                 LDAP_STAILQ_INIT(&c->c_ops);
 434                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 435
 436                 c->c_sasl_bind_mech.bv_val = NULL;
 437                 c->c_sasl_bind_mech.bv_len = 0;
 438                 c->c_sasl_context = NULL;
 439                 c->c_sasl_extra = NULL;
 440
 441                 c->c_sb = ber_sockbuf_alloc( );
 442
 443                 {
 444                         ber_len_t max = sockbuf_max_incoming;
 445                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 446                 }
 447
 448                 c->c_currentber = NULL;
 449
 450                 /* should check status of thread calls */
 451                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 452                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 453                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 454
 455                 c->c_struct_state = SLAP_C_UNUSED;
 456         }
 457
 458     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 459
 460     assert( c->c_struct_state == SLAP_C_UNUSED );
 461     assert( c->c_authmech.bv_val == NULL );
 462     assert( c->c_dn.bv_val == NULL );
 463     assert( c->c_ndn.bv_val == NULL );
 464     assert( c->c_cdn.bv_val == NULL );
 465     assert( c->c_groups == NULL );
 466     assert( c->c_listener_url.bv_val == NULL );
 467     assert( c->c_peer_domain.bv_val == NULL );
 468     assert( c->c_peer_name.bv_val == NULL );
 469     assert( c->c_sock_name.bv_val == NULL );
 470     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 471     assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 472         assert( c->c_sasl_bind_mech.bv_val == NULL );
 473         assert( c->c_sasl_context == NULL );
 474         assert( c->c_sasl_extra == NULL );
 475         assert( c->c_currentber == NULL );
 476
 477         ber_str2bv( url, 0, 1, &c->c_listener_url );
 478         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 479         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 480         ber_str2bv( sockname, 0, 1, &c->c_sock_name );
 481
 482     c->c_n_ops_received = 0;
 483     c->c_n_ops_executing = 0;
 484     c->c_n_ops_pending = 0;
 485     c->c_n_ops_completed = 0;
 486
 487         c->c_n_get = 0;
 488         c->c_n_read = 0;
 489         c->c_n_write = 0;
 490
 491         /* set to zero until bind, implies LDAP_VERSION3 */
 492         c->c_protocol = 0;
 493
 494 #ifdef SLAPD_MONITOR
 495         c->c_activitytime = c->c_starttime = slap_get_time();
 496 #else
 497         if( global_idletimeout > 0 ) {
 498                 c->c_activitytime = c->c_starttime = slap_get_time();
 499         }
 500 #endif
 501
 502 #ifdef LDAP_CONNECTIONLESS
 503         c->c_is_udp = 0;
 504         if (tls_udp_option == 2)
 505         {
 506                 c->c_is_udp = 1;
 507 #ifdef LDAP_DEBUG
 508         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 509                 LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 510 #endif
 511         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 512                 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 513         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 514                 LBER_SBIOD_LEVEL_PROVIDER, NULL );
 515         } else
 516 #endif
 517         {
 518 #ifdef LDAP_DEBUG
 519         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 520                 LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 521 #endif
 522         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 523                 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 524         }
 525
 526 #ifdef LDAP_DEBUG
 527         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 528                 INT_MAX, (void*)"ldap_" );
 529 #endif
 530
 531         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 532                 c /* non-NULL */ ) < 0 )
 533         {
 534 #ifdef NEW_LOGGING
 535                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 536                            "connection_init: conn %lu  set nonblocking failed\n",
 537                            c->c_connid ));
 538 #else
 539                 Debug( LDAP_DEBUG_ANY,
 540                         "connection_init(%d, %s): set nonblocking failed\n",
 541                         s, c->c_peer_name.bv_val, 0 );
 542 #endif
 543         }
 544
 545     id = c->c_connid = conn_nextid++;
 546
 547     c->c_conn_state = SLAP_C_INACTIVE;
 548     c->c_struct_state = SLAP_C_USED;
 549
 550         c->c_ssf = c->c_transport_ssf = ssf;
 551         c->c_tls_ssf = 0;
 552
 553 #ifdef HAVE_TLS
 554     if ( tls_udp_option == 1 ) {
 555             c->c_is_tls = 1;
 556             c->c_needs_tls_accept = 1;
 557     } else {
 558             c->c_is_tls = 0;
 559             c->c_needs_tls_accept = 0;
 560     }
 561 #endif
 562
 563         slap_sasl_open( c );
 564         slap_sasl_external( c, ssf, authid );
 565
 566     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 567     ldap_pvt_thread_mutex_unlock( &connections_mutex );
 568
 569     backend_connection_init(c);
 570
 571     return id;
 572 }
 573
 574 void connection2anonymous( Connection *c )
 575 {
 576     assert( connections != NULL );
 577     assert( c != NULL );
 578
 579         {
 580                 ber_len_t max = sockbuf_max_incoming;
 581                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 582         }
 583
 584         if(c->c_authmech.bv_val != NULL ) {
 585                 free(c->c_authmech.bv_val);
 586                 c->c_authmech.bv_val = NULL;
 587         }
 588         c->c_authmech.bv_len = 0;
 589
 590     if(c->c_dn.bv_val != NULL) {
 591         free(c->c_dn.bv_val);
 592         c->c_dn.bv_val = NULL;
 593     }
 594     c->c_dn.bv_len = 0;
 595     if(c->c_ndn.bv_val != NULL) {
 596         free(c->c_ndn.bv_val);
 597         c->c_ndn.bv_val = NULL;
 598     }
 599     c->c_ndn.bv_len = 0;
 600
 601         if(c->c_cdn.bv_val != NULL) {
 602                 free(c->c_cdn.bv_val);
 603                 c->c_cdn.bv_val = NULL;
 604         }
 605         c->c_cdn.bv_len = 0;
 606
 607         c->c_authz_backend = NULL;
 608
 609     {
 610         GroupAssertion *g, *n;
 611         for (g = c->c_groups; g; g=n)
 612         {
 613             n = g->ga_next;
 614             free(g);
 615         }
 616         c->c_groups = NULL;
 617     }
 618
 619 }
 620
 621 static void
 622 connection_destroy( Connection *c )
 623 {
 624         /* note: connections_mutex should be locked by caller */
 625     ber_socket_t        sd;
 626     unsigned long       connid;
 627
 628     assert( connections != NULL );
 629     assert( c != NULL );
 630     assert( c->c_struct_state != SLAP_C_UNUSED );
 631     assert( c->c_conn_state != SLAP_C_INVALID );
 632     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 633
 634     /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 635     connid = c->c_connid;
 636
 637     backend_connection_destroy(c);
 638
 639     c->c_protocol = 0;
 640     c->c_connid = -1;
 641
 642     c->c_activitytime = c->c_starttime = 0;
 643
 644         connection2anonymous( c );
 645
 646         if(c->c_listener_url.bv_val != NULL) {
 647                 free(c->c_listener_url.bv_val);
 648                 c->c_listener_url.bv_val = NULL;
 649         }
 650         c->c_listener_url.bv_len = 0;
 651
 652         if(c->c_peer_domain.bv_val != NULL) {
 653                 free(c->c_peer_domain.bv_val);
 654                 c->c_peer_domain.bv_val = NULL;
 655         }
 656         c->c_peer_domain.bv_len = 0;
 657         if(c->c_peer_name.bv_val != NULL) {
 658 #ifdef LDAP_PF_LOCAL
 659                 /*
 660                  * If peer was a domain socket, unlink. Mind you,
 661                  * they may be un-named. Should we leave this to
 662                  * the client?
 663                  */
 664                 if (strncmp(c->c_peer_name.bv_val, "PATH=",
 665                                         sizeof("PATH=") - 1) == 0) {
 666                         char *path = c->c_peer_name.bv_val
 667                                 + sizeof("PATH=") - 1;
 668                         if (path[0] != '\0') {
 669                                 (void)unlink(path);
 670                         }
 671                 }
 672 #endif /* LDAP_PF_LOCAL */
 673
 674                 free(c->c_peer_name.bv_val);
 675                 c->c_peer_name.bv_val = NULL;
 676         }
 677         c->c_peer_name.bv_len = 0;
 678         if(c->c_sock_name.bv_val != NULL) {
 679                 free(c->c_sock_name.bv_val);
 680                 c->c_sock_name.bv_val = NULL;
 681         }
 682         c->c_sock_name.bv_len = 0;
 683
 684         c->c_sasl_bind_in_progress = 0;
 685         if(c->c_sasl_bind_mech.bv_val != NULL) {
 686                 free(c->c_sasl_bind_mech.bv_val);
 687                 c->c_sasl_bind_mech.bv_val = NULL;
 688         }
 689         c->c_sasl_bind_mech.bv_len = 0;
 690
 691         slap_sasl_close( c );
 692
 693         if ( c->c_currentber != NULL ) {
 694                 ber_free( c->c_currentber, 1 );
 695                 c->c_currentber = NULL;
 696         }
 697
 698         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 699         if ( sd != AC_SOCKET_INVALID ) {
 700                 slapd_remove( sd, 0 );
 701
 702                 Statslog( LDAP_DEBUG_STATS,
 703                     "conn=%lu fd=%d closed\n",
 704                         connid, sd, 0, 0, 0 );
 705         }
 706
 707         ber_sockbuf_free( c->c_sb );
 708
 709         c->c_sb = ber_sockbuf_alloc( );
 710
 711         {
 712                 ber_len_t max = sockbuf_max_incoming;
 713                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 714         }
 715
 716     c->c_conn_state = SLAP_C_INVALID;
 717     c->c_struct_state = SLAP_C_UNUSED;
 718 }
 719
 720 int connection_state_closing( Connection *c )
 721 {
 722         /* c_mutex must be locked by caller */
 723
 724         int state;
 725         assert( c != NULL );
 726         assert( c->c_struct_state == SLAP_C_USED );
 727
 728         state = c->c_conn_state;
 729
 730         assert( state != SLAP_C_INVALID );
 731
 732         return state == SLAP_C_CLOSING;
 733 }
 734
 735 static void connection_abandon( Connection *c )
 736 {
 737         /* c_mutex must be locked by caller */
 738
 739         Operation *o;
 740
 741         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
 742                 o->o_abandon = 1;
 743         }
 744
 745         /* remove pending operations */
 746         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 747                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 748                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 749                 slap_op_free( o );
 750         }
 751 }
 752
 753 void connection_closing( Connection *c )
 754 {
 755         assert( connections != NULL );
 756         assert( c != NULL );
 757         assert( c->c_struct_state == SLAP_C_USED );
 758         assert( c->c_conn_state != SLAP_C_INVALID );
 759
 760         /* c_mutex must be locked by caller */
 761
 762         if( c->c_conn_state != SLAP_C_CLOSING ) {
 763                 ber_socket_t    sd;
 764
 765                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 766 #ifdef NEW_LOGGING
 767                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 768                            "connection_closing: conn %lu readying socket %d for close.\n",
 769                            c->c_connid, sd ));
 770 #else
 771                 Debug( LDAP_DEBUG_TRACE,
 772                         "connection_closing: readying conn=%lu sd=%d for close\n",
 773                         c->c_connid, sd, 0 );
 774 #endif
 775                 /* update state to closing */
 776                 c->c_conn_state = SLAP_C_CLOSING;
 777
 778                 /* don't listen on this port anymore */
 779                 slapd_clr_read( sd, 1 );
 780
 781                 /* abandon active operations */
 782                 connection_abandon( c );
 783
 784                 /* wake write blocked operations */
 785                 slapd_clr_write( sd, 1 );
 786                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 787         }
 788 }
 789
 790 static void connection_close( Connection *c )
 791 {
 792         ber_socket_t    sd;
 793
 794         assert( connections != NULL );
 795         assert( c != NULL );
 796         assert( c->c_struct_state == SLAP_C_USED );
 797         assert( c->c_conn_state == SLAP_C_CLOSING );
 798
 799         /* note: connections_mutex and c_mutex should be locked by caller */
 800
 801         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 802         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 803 #ifdef NEW_LOGGING
 804                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 805                            "connection_close: conn %lu  deferring sd %d\n",
 806                            c->c_connid, sd ));
 807 #else
 808                 Debug( LDAP_DEBUG_TRACE,
 809                         "connection_close: deferring conn=%lu sd=%d\n",
 810                         c->c_connid, sd, 0 );
 811 #endif
 812                 return;
 813         }
 814
 815 #ifdef NEW_LOGGING
 816         LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
 817                    "connection_close: conn %lu  sd %d\n",
 818                    c->c_connid, sd ));
 819 #else
 820         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 821                 c->c_connid, sd, 0 );
 822 #endif
 823         connection_destroy( c );
 824 }
 825
 826 unsigned long connections_nextid(void)
 827 {
 828         unsigned long id;
 829         assert( connections != NULL );
 830
 831         ldap_pvt_thread_mutex_lock( &connections_mutex );
 832
 833         id = conn_nextid;
 834
 835         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 836
 837         return id;
 838 }
 839
 840 Connection* connection_first( ber_socket_t *index )
 841 {
 842         assert( connections != NULL );
 843         assert( index != NULL );
 844
 845         ldap_pvt_thread_mutex_lock( &connections_mutex );
 846
 847         *index = 0;
 848
 849         return connection_next(NULL, index);
 850 }
 851
 852 Connection* connection_next( Connection *c, ber_socket_t *index )
 853 {
 854         assert( connections != NULL );
 855         assert( index != NULL );
 856         assert( *index <= dtblsize );
 857
 858         if( c != NULL ) {
 859                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 860         }
 861
 862         c = NULL;
 863
 864         for(; *index < dtblsize; (*index)++) {
 865                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 866                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 867 #ifndef HAVE_WINSOCK
 868                         continue;
 869 #else
 870                         break;
 871 #endif
 872                 }
 873
 874                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 875                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 876                         c = &connections[(*index)++];
 877                         break;
 878                 }
 879
 880                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 881                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 882         }
 883
 884         if( c != NULL ) {
 885                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 886         }
 887
 888         return c;
 889 }
 890
 891 void connection_done( Connection *c )
 892 {
 893         assert( connections != NULL );
 894
 895         if( c != NULL ) {
 896                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 897         }
 898
 899         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 900 }
 901
 902 /*
 903  * connection_activity - handle the request operation op on connection
 904  * conn.  This routine figures out what kind of operation it is and
 905  * calls the appropriate stub to handle it.
 906  */
 907
 908 #ifdef SLAPD_MONITOR
 909 #define INCR_OP(var,index) \
 910         do { \
 911                 ldap_pvt_thread_mutex_lock( &num_ops_mutex ); \
 912                 (var)[(index)]++; \
 913                 ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); \
 914         } while (0)
 915 #else /* !SLAPD_MONITOR */
 916 #define INCR_OP(var,index)
 917 #endif /* !SLAPD_MONITOR */
 918
 919 static void *
 920 connection_operation( void *arg_v )
 921 {
 922         int rc;
 923         struct co_arg   *arg = arg_v;
 924         ber_tag_t tag = arg->co_op->o_tag;
 925 #ifdef SLAPD_MONITOR
 926         ber_tag_t oldtag = tag;
 927 #endif /* SLAPD_MONITOR */
 928         Connection *conn = arg->co_conn;
 929
 930         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 931         num_ops_initiated++;
 932         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 933
 934         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 935 #ifdef NEW_LOGGING
 936                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
 937                            "connection_operation: conn %lu  SASL bind in progress (tag=%ld).\n",
 938                            conn->c_connid, (long)tag ));
 939 #else
 940                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 941                         "error: SASL bind in progress (tag=%ld).\n",
 942                         (long) tag, 0, 0 );
 943 #endif
 944                 send_ldap_result( conn, arg->co_op,
 945                         rc = LDAP_OPERATIONS_ERROR,
 946                         NULL, "SASL bind in progress", NULL, NULL );
 947                 goto operations_error;
 948         }
 949
 950         switch ( tag ) {
 951         case LDAP_REQ_BIND:
 952                 INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
 953                 rc = do_bind( conn, arg->co_op );
 954                 break;
 955
 956         case LDAP_REQ_UNBIND:
 957                 INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
 958                 rc = do_unbind( conn, arg->co_op );
 959                 break;
 960
 961         case LDAP_REQ_ADD:
 962                 INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
 963                 rc = do_add( conn, arg->co_op );
 964                 break;
 965
 966         case LDAP_REQ_DELETE:
 967                 INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
 968                 rc = do_delete( conn, arg->co_op );
 969                 break;
 970
 971         case LDAP_REQ_MODRDN:
 972                 INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
 973                 rc = do_modrdn( conn, arg->co_op );
 974                 break;
 975
 976         case LDAP_REQ_MODIFY:
 977                 INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
 978                 rc = do_modify( conn, arg->co_op );
 979                 break;
 980
 981         case LDAP_REQ_COMPARE:
 982                 INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
 983                 rc = do_compare( conn, arg->co_op );
 984                 break;
 985
 986         case LDAP_REQ_SEARCH:
 987                 INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
 988                 rc = do_search( conn, arg->co_op );
 989                 break;
 990
 991         case LDAP_REQ_ABANDON:
 992                 INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
 993                 rc = do_abandon( conn, arg->co_op );
 994                 break;
 995
 996         case LDAP_REQ_EXTENDED:
 997                 INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
 998                 rc = do_extended( conn, arg->co_op );
 999                 break;
1000
1001         default:
1002 #ifdef NEW_LOGGING
1003                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1004                            "connection_operation: conn %lu  unknown LDAP request 0x%lx\n",
1005                            conn->c_connid, tag ));
1006 #else
1007                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
1008                     tag, 0, 0 );
1009 #endif
1010                 arg->co_op->o_tag = LBER_ERROR;
1011                 send_ldap_disconnect( conn, arg->co_op,
1012                         LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
1013                 rc = -1;
1014                 break;
1015         }
1016
1017 #ifdef SLAPD_MONITOR
1018         oldtag = tag;
1019 #endif /* SLAPD_MONITOR */
1020         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
1021
1022 operations_error:
1023         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
1024         num_ops_completed++;
1025 #ifdef SLAPD_MONITOR
1026         switch (oldtag) {
1027         case LDAP_REQ_BIND:
1028                 num_ops_completed_[SLAP_OP_BIND]++;
1029                 break;
1030         case LDAP_REQ_UNBIND:
1031                 num_ops_completed_[SLAP_OP_UNBIND]++;
1032                 break;
1033         case LDAP_REQ_ADD:
1034                 num_ops_completed_[SLAP_OP_ADD]++;
1035                 break;
1036         case LDAP_REQ_DELETE:
1037                 num_ops_completed_[SLAP_OP_DELETE]++;
1038                 break;
1039         case LDAP_REQ_MODRDN:
1040                 num_ops_completed_[SLAP_OP_MODRDN]++;
1041                 break;
1042         case LDAP_REQ_MODIFY:
1043                 num_ops_completed_[SLAP_OP_MODIFY]++;
1044                 break;
1045         case LDAP_REQ_COMPARE:
1046                 num_ops_completed_[SLAP_OP_COMPARE]++;
1047                 break;
1048         case LDAP_REQ_SEARCH:
1049                 num_ops_completed_[SLAP_OP_SEARCH]++;
1050                 break;
1051         case LDAP_REQ_ABANDON:
1052                 num_ops_completed_[SLAP_OP_ABANDON]++;
1053                 break;
1054         case LDAP_REQ_EXTENDED:
1055                 num_ops_completed_[SLAP_OP_EXTENDED]++;
1056                 break;
1057         }
1058 #endif /* SLAPD_MONITOR */
1059         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1060
1061         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1062
1063         conn->c_n_ops_executing--;
1064         conn->c_n_ops_completed++;
1065
1066         LDAP_STAILQ_REMOVE( &conn->c_ops, arg->co_op, slap_op, o_next);
1067         LDAP_STAILQ_NEXT(arg->co_op, o_next) = NULL;
1068         slap_op_free( arg->co_op );
1069         arg->co_op = NULL;
1070         arg->co_conn = NULL;
1071         free( (char *) arg );
1072         arg = NULL;
1073
1074         switch( tag ) {
1075         case LBER_ERROR:
1076         case LDAP_REQ_UNBIND:
1077                 /* c_mutex is locked */
1078                 connection_closing( conn );
1079                 break;
1080
1081         case LDAP_REQ_BIND:
1082                 conn->c_sasl_bind_in_progress =
1083                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1084
1085                 if( conn->c_conn_state == SLAP_C_BINDING) {
1086                         conn->c_conn_state = SLAP_C_ACTIVE;
1087                 }
1088         }
1089
1090         connection_resched( conn );
1091
1092         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1093
1094         return NULL;
1095 }
1096
1097 int connection_read(ber_socket_t s)
1098 {
1099         int rc = 0;
1100         Connection *c;
1101         assert( connections != NULL );
1102
1103         ldap_pvt_thread_mutex_lock( &connections_mutex );
1104
1105         /* get (locked) connection */
1106         c = connection_get( s );
1107
1108         if( c == NULL ) {
1109 #ifdef NEW_LOGGING
1110                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1111                            "connection_read: sock %ld no connection\n",
1112                            (long)s ));
1113 #else
1114                 Debug( LDAP_DEBUG_ANY,
1115                         "connection_read(%ld): no connection!\n",
1116                         (long) s, 0, 0 );
1117 #endif
1118                 slapd_remove(s, 0);
1119
1120                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1121                 return -1;
1122         }
1123
1124         c->c_n_read++;
1125
1126         if( c->c_conn_state == SLAP_C_CLOSING ) {
1127 #ifdef NEW_LOGGING
1128                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1129                            "connection_read: conn %lu connection closing, ignoring input\n",
1130                            c->c_connid));
1131 #else
1132                 Debug( LDAP_DEBUG_TRACE,
1133                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1134                         s, c->c_connid, 0 );
1135 #endif
1136                 connection_return( c );
1137                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1138                 return 0;
1139         }
1140
1141 #ifdef NEW_LOGGING
1142         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1143                    "connection_read: conn %lu  checking for input.\n", c->c_connid ));
1144 #else
1145         Debug( LDAP_DEBUG_TRACE,
1146                 "connection_read(%d): checking for input on id=%lu\n",
1147                 s, c->c_connid, 0 );
1148 #endif
1149
1150 #ifdef HAVE_TLS
1151         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1152                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1153                 if ( rc < 0 ) {
1154 #if 0 /* required by next #if 0 */
1155                         struct timeval tv;
1156                         fd_set rfd;
1157 #endif
1158
1159 #ifdef NEW_LOGGING
1160                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1161                                    "connection_read: conn %lu  TLS accept error, error %d\n",
1162                                    c->c_connid, rc ));
1163 #else
1164                         Debug( LDAP_DEBUG_TRACE,
1165                                 "connection_read(%d): TLS accept error "
1166                                 "error=%d id=%lu, closing\n",
1167                                 s, rc, c->c_connid );
1168 #endif
1169                         c->c_needs_tls_accept = 0;
1170                         /* connections_mutex and c_mutex are locked */
1171                         connection_closing( c );
1172
1173 #if 0
1174                         /* Drain input before close, to allow SSL error codes
1175                          * to propagate to client. */
1176                         FD_ZERO(&rfd);
1177                         FD_SET(s, &rfd);
1178                         for (rc=1; rc>0;)
1179                         {
1180                             tv.tv_sec = 1;
1181                             tv.tv_usec = 0;
1182                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1183                             if (rc == 1)
1184                                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN,
1185                                     NULL);
1186                         }
1187 #endif
1188                         connection_close( c );
1189
1190                 } else if ( rc == 0 ) {
1191                         void *ssl;
1192                         char *authid;
1193
1194                         c->c_needs_tls_accept = 0;
1195
1196                         /* we need to let SASL know */
1197                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1198
1199                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1200                         if( c->c_tls_ssf > c->c_ssf ) {
1201                                 c->c_ssf = c->c_tls_ssf;
1202                         }
1203
1204                         authid = dnX509peerNormalize( ssl );
1205                         slap_sasl_external( c, c->c_tls_ssf, authid );
1206                 }
1207                 connection_return( c );
1208                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1209                 return 0;
1210         }
1211 #endif
1212
1213 #ifdef HAVE_CYRUS_SASL
1214         if ( c->c_sasl_layers ) {
1215                 c->c_sasl_layers = 0;
1216
1217                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
1218
1219                 if( rc != LDAP_SUCCESS ) {
1220 #ifdef NEW_LOGGING
1221                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1222                                    "connection_read: conn %lu SASL install error %d, closing\n",
1223                                    c->c_connid, rc ));
1224 #else
1225                         Debug( LDAP_DEBUG_TRACE,
1226                                 "connection_read(%d): SASL install error "
1227                                 "error=%d id=%lu, closing\n",
1228                                 s, rc, c->c_connid );
1229 #endif
1230                         /* connections_mutex and c_mutex are locked */
1231                         connection_closing( c );
1232                         connection_close( c );
1233                         connection_return( c );
1234                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1235                         return 0;
1236                 }
1237         }
1238 #endif
1239
1240 #define CONNECTION_INPUT_LOOP 1
1241
1242 #ifdef DATA_READY_LOOP
1243         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
1244 #elif CONNECTION_INPUT_LOOP
1245         while(!rc)
1246 #endif
1247         {
1248                 /* How do we do this without getting into a busy loop ? */
1249                 rc = connection_input( c );
1250         }
1251
1252         if( rc < 0 ) {
1253 #ifdef NEW_LOGGING
1254                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1255                            "connection_read: conn %lu  input error %d, closing.\n",
1256                            c->c_connid, rc ));
1257 #else
1258                 Debug( LDAP_DEBUG_TRACE,
1259                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1260                         s, rc, c->c_connid );
1261 #endif
1262                 /* connections_mutex and c_mutex are locked */
1263                 connection_closing( c );
1264                 connection_close( c );
1265                 connection_return( c );
1266                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1267                 return 0;
1268         }
1269
1270         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1271                 slapd_set_read( s, 1 );
1272         }
1273
1274         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1275                 slapd_set_write( s, 1 );
1276         }
1277
1278         connection_return( c );
1279         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1280         return 0;
1281 }
1282
1283 static int
1284 connection_input(
1285     Connection *conn
1286 )
1287 {
1288         Operation *op;
1289         ber_tag_t       tag;
1290         ber_len_t       len;
1291         ber_int_t       msgid;
1292         BerElement      *ber;
1293 #ifdef LDAP_CONNECTIONLESS
1294         Sockaddr        peeraddr;
1295         char            *cdn = NULL;
1296 #endif
1297
1298         if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
1299             == NULL ) {
1300 #ifdef NEW_LOGGING
1301                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1302                            "connection_input: conn %lu  ber_alloc failed.\n",
1303                            conn->c_connid ));
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         {
1315                 char    peername[sizeof("IP=255.255.255.255:65336")];
1316                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1317                         sizeof(struct sockaddr));
1318                 if (len != sizeof(struct sockaddr))
1319                         return 1;
1320                 sprintf( peername, "IP=%s:%d",
1321                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1322                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1323                 Statslog( LDAP_DEBUG_STATS,
1324                         "conn=%lu UDP request from %s (%s) accepted.\n",
1325                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1326         }
1327 #endif
1328         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1329         if ( tag != LDAP_TAG_MESSAGE ) {
1330                 int err = errno;
1331                 ber_socket_t    sd;
1332
1333                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1334
1335 #ifdef NEW_LOGGING
1336                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1337                            "connection_input: conn %lu  ber_get_next failed, errno %d (%s).\n",
1338                            conn->c_connid, err, sock_errstr(err) ));
1339 #else
1340                 Debug( LDAP_DEBUG_TRACE,
1341                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1342                         sd, err, sock_errstr(err) );
1343 #endif
1344                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1345                         /* log, close and send error */
1346                         ber_free( conn->c_currentber, 1 );
1347                         conn->c_currentber = NULL;
1348
1349                         return -2;
1350                 }
1351                 return 1;
1352         }
1353
1354         ber = conn->c_currentber;
1355         conn->c_currentber = NULL;
1356
1357         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1358                 /* log, close and send error */
1359 #ifdef NEW_LOGGING
1360                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1361                            "connection_input: conn %lu  ber_get_int returns 0x%lx.\n",
1362                            conn->c_connid, tag ));
1363 #else
1364                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1365                     0 );
1366 #endif
1367                 ber_free( ber, 1 );
1368                 return -1;
1369         }
1370
1371         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1372                 /* log, close and send error */
1373 #ifdef NEW_LOGGING
1374                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1375                            "connection_input: conn %lu  ber_peek_tag returns 0x%lx.\n",
1376                            conn->c_connid, tag ));
1377 #else
1378                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1379                     0 );
1380 #endif
1381                 ber_free( ber, 1 );
1382
1383                 return -1;
1384         }
1385
1386 #ifdef LDAP_CONNECTIONLESS
1387         if (conn->c_is_udp) {
1388                 if (tag == LBER_OCTETSTRING) {
1389                         ber_get_stringa( ber, &cdn );
1390                         tag = ber_peek_tag(ber, &len);
1391                 }
1392                 if (tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH) {
1393 #ifdef NEW_LOGGING
1394                     LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1395                                "connection_input: conn %lu  invalid req for UDP 0x%lx.\n",
1396                                conn->c_connid, tag ));
1397 #else
1398                     Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1399                         0 );
1400 #endif
1401                     ber_free( ber, 1 );
1402                     return 0;
1403                 }
1404         }
1405 #endif
1406         if(tag == LDAP_REQ_BIND) {
1407                 /* immediately abandon all exiting operations upon BIND */
1408                 connection_abandon( conn );
1409         }
1410
1411         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1412
1413         op->o_pagedresults_state = conn->c_pagedresults_state;
1414
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         if ( conn->c_conn_state == SLAP_C_BINDING
1423                 || conn->c_conn_state == SLAP_C_CLOSING )
1424         {
1425 #ifdef NEW_LOGGING
1426                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1427                            "connection_input: conn %lu  deferring operation\n",
1428                            conn->c_connid ));
1429 #else
1430                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1431 #endif
1432                 conn->c_n_ops_pending++;
1433                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1434
1435         } else {
1436                 conn->c_n_ops_executing++;
1437                 connection_op_activate( conn, op );
1438         }
1439
1440 #ifdef NO_THREADS
1441         if ( conn->c_struct_state != SLAP_C_USED ) {
1442                 /* connection must have got closed underneath us */
1443                 return 1;
1444         }
1445 #endif
1446         assert( conn->c_struct_state == SLAP_C_USED );
1447
1448         return 0;
1449 }
1450
1451 static int
1452 connection_resched( Connection *conn )
1453 {
1454         Operation *op;
1455
1456         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1457                 int rc;
1458                 ber_socket_t    sd;
1459                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1460
1461                 /* us trylock to avoid possible deadlock */
1462                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1463
1464                 if( rc ) {
1465 #ifdef NEW_LOGGING
1466                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1467                                    "connection_resched: conn %lu  reaquiring locks.\n",
1468                                    conn->c_connid ));
1469 #else
1470                         Debug( LDAP_DEBUG_TRACE,
1471                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1472                                 conn->c_connid, sd, 0 );
1473 #endif
1474                         /*
1475                          * reaquire locks in the right order...
1476                          * this may allow another thread to close this connection,
1477                          * so recheck state below.
1478                          */
1479                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1480                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1481                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1482                 }
1483
1484                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1485 #ifdef NEW_LOGGING
1486                         LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1487                                    "connection_resched: conn %lu  closed by other thread.\n",
1488                                    conn->c_connid ));
1489 #else
1490                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1491                                 "closed by other thread conn=%lu sd=%d\n",
1492                                 conn->c_connid, sd, 0 );
1493 #endif
1494                 } else {
1495 #ifdef NEW_LOGGING
1496                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1497                                    "connection_resched: conn %lu  attempting closing.\n",
1498                                    conn->c_connid ));
1499 #else
1500                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1501                                 "attempting closing conn=%lu sd=%d\n",
1502                                 conn->c_connid, sd, 0 );
1503 #endif
1504                         connection_close( conn );
1505                 }
1506
1507                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1508                 return 0;
1509         }
1510
1511         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1512                 /* other states need different handling */
1513                 return 0;
1514         }
1515
1516         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1517                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1518                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1519                 /* pending operations should not be marked for abandonment */
1520                 assert(!op->o_abandon);
1521
1522                 conn->c_n_ops_pending--;
1523                 conn->c_n_ops_executing++;
1524
1525                 connection_op_activate( conn, op );
1526
1527                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1528                         break;
1529                 }
1530         }
1531         return 0;
1532 }
1533
1534 static int connection_op_activate( Connection *conn, Operation *op )
1535 {
1536         struct co_arg *arg;
1537         int status;
1538         ber_tag_t tag = op->o_tag;
1539
1540         if(tag == LDAP_REQ_BIND) {
1541                 conn->c_conn_state = SLAP_C_BINDING;
1542         }
1543
1544         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1545         arg->co_conn = conn;
1546         arg->co_op = op;
1547
1548         if (!arg->co_op->o_dn.bv_len) {
1549             arg->co_op->o_authz = conn->c_authz;
1550             arg->co_op->o_dn.bv_val = ch_strdup( conn->c_dn.bv_val ?
1551                 conn->c_dn.bv_val : "" );
1552             arg->co_op->o_ndn.bv_val = ch_strdup( conn->c_ndn.bv_val ?
1553                 conn->c_ndn.bv_val : "" );
1554         }
1555         arg->co_op->o_authtype = conn->c_authtype;
1556         ber_dupbv( &arg->co_op->o_authmech, &conn->c_authmech );
1557
1558         if (!arg->co_op->o_protocol) {
1559             arg->co_op->o_protocol = conn->c_protocol
1560                 ? conn->c_protocol : LDAP_VERSION3;
1561         }
1562         arg->co_op->o_connid = conn->c_connid;
1563
1564         LDAP_STAILQ_INSERT_TAIL( &conn->c_ops, arg->co_op, o_next );
1565
1566         status = ldap_pvt_thread_pool_submit( &connection_pool,
1567                 connection_operation, (void *) arg );
1568
1569         if ( status != 0 ) {
1570 #ifdef NEW_LOGGING
1571                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1572                            "connection_op_activate: conn %lu     thread pool submit failed.\n",
1573                            conn->c_connid ));
1574 #else
1575                 Debug( LDAP_DEBUG_ANY,
1576                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1577 #endif
1578                 /* should move op to pending list */
1579         }
1580
1581         return status;
1582 }
1583
1584 int connection_write(ber_socket_t s)
1585 {
1586         Connection *c;
1587         assert( connections != NULL );
1588
1589         ldap_pvt_thread_mutex_lock( &connections_mutex );
1590
1591         c = connection_get( s );
1592
1593         slapd_clr_write( s, 0);
1594
1595         if( c == NULL ) {
1596 #ifdef NEW_LOGGING
1597                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1598                            "connection_write: sock %ld  no connection!\n",(long)s));
1599 #else
1600                 Debug( LDAP_DEBUG_ANY,
1601                         "connection_write(%ld): no connection!\n",
1602                         (long) s, 0, 0 );
1603 #endif
1604                 slapd_remove(s, 0);
1605                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1606                 return -1;
1607         }
1608
1609         c->c_n_write++;
1610
1611 #ifdef NEW_LOGGING
1612         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1613                    "connection_write conn %lu  waking output.\n",
1614                    c->c_connid ));
1615 #else
1616         Debug( LDAP_DEBUG_TRACE,
1617                 "connection_write(%d): waking output for id=%lu\n",
1618                 s, c->c_connid, 0 );
1619 #endif
1620         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1621
1622         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1623                 slapd_set_read( s, 1 );
1624         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1625                 slapd_set_write( s, 1 );
1626         connection_return( c );
1627         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1628         return 0;
1629 }
1630