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/signal.h>
  15 #include <ac/string.h>
  16 #include <ac/time.h>
  17 #include <ac/unistd.h>
  18
  19 #include "ldap_pvt.h"
  20 #include "lutil.h"
  21 #include "slap.h"
  22
  23 /* protected by connections_mutex */
  24 static ldap_pvt_thread_mutex_t connections_mutex;
  25 static Connection *connections = NULL;
  26 static unsigned long conn_nextid = 0;
  27
  28 /* structure state (protected by connections_mutex) */
  29 #define SLAP_C_UNINITIALIZED    0x00    /* MUST BE ZERO (0) */
  30 #define SLAP_C_UNUSED                   0x01
  31 #define SLAP_C_USED                             0x02
  32
  33 /* connection state (protected by c_mutex ) */
  34 #define SLAP_C_INVALID                  0x00    /* MUST BE ZERO (0) */
  35 #define SLAP_C_INACTIVE                 0x01    /* zero threads */
  36 #define SLAP_C_ACTIVE                   0x02    /* one or more threads */
  37 #define SLAP_C_BINDING                  0x03    /* binding */
  38 #define SLAP_C_CLOSING                  0x04    /* closing */
  39
  40 const char *
  41 connection_state2str( int state )
  42 {
  43         switch( state ) {
  44         case SLAP_C_INVALID:    return "!";
  45         case SLAP_C_INACTIVE:   return "|";
  46         case SLAP_C_ACTIVE:             return "";
  47         case SLAP_C_BINDING:    return "B";
  48         case SLAP_C_CLOSING:    return "C";
  49         }
  50
  51         return "?";
  52 }
  53
  54 static Connection* connection_get( ber_socket_t s );
  55
  56 static int connection_input( Connection *c );
  57 static void connection_close( Connection *c );
  58
  59 static int connection_op_activate( Connection *conn, Operation *op );
  60 static int connection_resched( Connection *conn );
  61 static void connection_abandon( Connection *conn );
  62 static void connection_destroy( Connection *c );
  63
  64 struct co_arg {
  65         Connection      *co_conn;
  66         Operation       *co_op;
  67 };
  68
  69 /*
  70  * Initialize connection management infrastructure.
  71  */
  72 int connections_init(void)
  73 {
  74         assert( connections == NULL );
  75
  76         if( connections != NULL) {
  77 #ifdef NEW_LOGGING
  78                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
  79                            "connections_init:  already initialized.\n" ));
  80 #else
  81                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
  82                         0, 0, 0 );
  83 #endif
  84                 return -1;
  85         }
  86
  87         /* should check return of every call */
  88         ldap_pvt_thread_mutex_init( &connections_mutex );
  89
  90         connections = (Connection *) calloc( dtblsize, sizeof(Connection) );
  91
  92         if( connections == NULL ) {
  93 #ifdef NEW_LOGGING
  94                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
  95                            "connections_init: allocation (%d * %ld) of connection array failed\n",
  96                            dtblsize, (long) sizeof(Connection) ));
  97 #else
  98                 Debug( LDAP_DEBUG_ANY,
  99                         "connections_init: allocation (%d*%ld) of connection array failed\n",
 100                         dtblsize, (long) sizeof(Connection), 0 );
 101 #endif
 102                 return -1;
 103         }
 104
 105     assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
 106     assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 107
 108         /*
 109          * per entry initialization of the Connection array initialization
 110          * will be done by connection_init()
 111          */
 112
 113         return 0;
 114 }
 115
 116 /*
 117  * Destroy connection management infrastructure.
 118  */
 119 int connections_destroy(void)
 120 {
 121         ber_socket_t i;
 122
 123         /* should check return of every call */
 124
 125         if( connections == NULL) {
 126 #ifdef NEW_LOGGING
 127                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 128                            "connections_destroy: nothing to destroy.\n"));
 129 #else
 130                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
 131                         0, 0, 0 );
 132 #endif
 133                 return -1;
 134         }
 135
 136         for ( i = 0; i < dtblsize; i++ ) {
 137                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 138                         ber_sockbuf_free( connections[i].c_sb );
 139                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 140                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
 141                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 142                 }
 143         }
 144
 145         free( connections );
 146         connections = NULL;
 147
 148         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 149         return 0;
 150 }
 151
 152 /*
 153  * shutdown all connections
 154  */
 155 int connections_shutdown(void)
 156 {
 157         ber_socket_t i;
 158
 159         ldap_pvt_thread_mutex_lock( &connections_mutex );
 160
 161         for ( i = 0; i < dtblsize; i++ ) {
 162                 if( connections[i].c_struct_state != SLAP_C_USED ) {
 163                         continue;
 164                 }
 165
 166                 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 167
 168                 /* connections_mutex and c_mutex are locked */
 169                 connection_closing( &connections[i] );
 170                 connection_close( &connections[i] );
 171
 172                 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 173         }
 174
 175         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 176
 177         return 0;
 178 }
 179
 180 /*
 181  * Timeout idle connections.
 182  */
 183 int connections_timeout_idle(time_t now)
 184 {
 185         int i = 0;
 186         int connindex;
 187         Connection* c;
 188
 189         for( c = connection_first( &connindex );
 190                 c != NULL;
 191                 c = connection_next( c, &connindex ) )
 192         {
 193                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 194                         /* close it */
 195                         connection_closing( c );
 196                         connection_close( c );
 197                         i++;
 198                 }
 199         }
 200         connection_done( c );
 201
 202         return i;
 203 }
 204
 205 static Connection* connection_get( ber_socket_t s )
 206 {
 207         /* connections_mutex should be locked by caller */
 208
 209         Connection *c;
 210
 211 #ifdef NEW_LOGGING
 212         LDAP_LOG(( "connection", LDAP_LEVEL_ENTRY,
 213                    "connection_get: socket %ld\n", (long)s ));
 214 #else
 215         Debug( LDAP_DEBUG_ARGS,
 216                 "connection_get(%ld)\n",
 217                 (long) s, 0, 0 );
 218 #endif
 219
 220         assert( connections != NULL );
 221
 222         if(s == AC_SOCKET_INVALID) {
 223                 return NULL;
 224         }
 225
 226 #ifndef HAVE_WINSOCK
 227         c = &connections[s];
 228
 229         assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 230
 231 #else
 232         c = NULL;
 233         {
 234                 ber_socket_t i, sd;
 235
 236                 for(i=0; i<dtblsize; i++) {
 237                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 238                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 239                                 assert( connections[i].c_sb == 0 );
 240                                 break;
 241                         }
 242
 243                         ber_sockbuf_ctrl( connections[i].c_sb,
 244                                 LBER_SB_OPT_GET_FD, &sd );
 245
 246                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 247                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 248                                 assert( sd == AC_SOCKET_INVALID );
 249                                 continue;
 250                         }
 251
 252                         /* state can actually change from used -> unused by resched,
 253                          * so don't assert details here.
 254                          */
 255
 256                         if( sd == s ) {
 257                                 c = &connections[i];
 258                                 break;
 259                         }
 260                 }
 261         }
 262 #endif
 263
 264         if( c != NULL ) {
 265                 ber_socket_t    sd;
 266
 267                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 268
 269                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 270                 if( c->c_struct_state != SLAP_C_USED ) {
 271                         /* connection must have been closed due to resched */
 272
 273                         assert( c->c_conn_state == SLAP_C_INVALID );
 274                         assert( sd == AC_SOCKET_INVALID );
 275
 276 #ifdef NEW_LOGGING
 277                         LDAP_LOG(( "connection", LDAP_LEVEL_ARGS,
 278                                    "connection_get:  connection %d not used\n", s ));
 279 #else
 280                         Debug( LDAP_DEBUG_TRACE,
 281                                 "connection_get(%d): connection not used\n",
 282                                 s, 0, 0 );
 283 #endif
 284
 285                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 286                         return NULL;
 287                 }
 288
 289 #ifdef NEW_LOGGING
 290                 LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
 291                            "connection_get: get for %d got connid %lu\n", s, c->c_connid ));
 292 #else
 293                 Debug( LDAP_DEBUG_TRACE,
 294                         "connection_get(%d): got connid=%lu\n",
 295                         s, c->c_connid, 0 );
 296 #endif
 297
 298                 c->c_n_get++;
 299
 300                 assert( c->c_struct_state == SLAP_C_USED );
 301                 assert( c->c_conn_state != SLAP_C_INVALID );
 302                 assert( sd != AC_SOCKET_INVALID );
 303
 304 #ifdef SLAPD_MONITOR
 305                 c->c_activitytime = slap_get_time();
 306 #else
 307                 if( global_idletimeout > 0 ) {
 308                         c->c_activitytime = slap_get_time();
 309                 }
 310 #endif
 311         }
 312
 313         return c;
 314 }
 315
 316 static void connection_return( Connection *c )
 317 {
 318         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 319 }
 320
 321 long connection_init(
 322         ber_socket_t s,
 323         const char* url,
 324         const char* dnsname,
 325         const char* peername,
 326         const char* sockname,
 327         int tls_udp_option,
 328         slap_ssf_t ssf,
 329         const char *authid )
 330 {
 331         unsigned long id;
 332         Connection *c;
 333
 334         assert( connections != NULL );
 335
 336         assert( dnsname != NULL );
 337         assert( peername != NULL );
 338         assert( sockname != NULL );
 339
 340 #ifndef HAVE_TLS
 341         assert( tls_udp_option != 1 );
 342 #endif
 343
 344         if( s == AC_SOCKET_INVALID ) {
 345 #ifdef NEW_LOGGING
 346                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 347                            "connection_init: init of socket %ld invalid.\n", (long)s ));
 348 #else
 349                 Debug( LDAP_DEBUG_ANY,
 350                        "connection_init(%ld): invalid.\n",
 351                        (long) s, 0, 0 );
 352 #endif
 353                 return -1;
 354         }
 355
 356         assert( s >= 0 );
 357 #ifndef HAVE_WINSOCK
 358         assert( s < dtblsize );
 359 #endif
 360
 361         ldap_pvt_thread_mutex_lock( &connections_mutex );
 362
 363 #ifndef HAVE_WINSOCK
 364         c = &connections[s];
 365
 366 #else
 367         {
 368                 ber_socket_t    i;
 369
 370                 c = NULL;
 371
 372         for( i=0; i < dtblsize; i++) {
 373                 ber_socket_t    sd;
 374
 375             if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 376                 assert( connections[i].c_sb == 0 );
 377                 c = &connections[i];
 378                 break;
 379             }
 380
 381                         sd = AC_SOCKET_INVALID;
 382                         if (connections[i].c_sb != NULL)
 383                         ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd );
 384
 385             if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 386                 assert( sd == AC_SOCKET_INVALID );
 387                 c = &connections[i];
 388                 break;
 389             }
 390
 391             assert( connections[i].c_struct_state == SLAP_C_USED );
 392             assert( connections[i].c_conn_state != SLAP_C_INVALID );
 393             assert( sd != AC_SOCKET_INVALID );
 394         }
 395
 396         if( c == NULL ) {
 397 #ifdef NEW_LOGGING
 398                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 399                            "connection_init: skt %d      connection table full (%d/%d)\n",
 400                            s, i, dtblsize ));
 401 #else
 402                 Debug( LDAP_DEBUG_ANY,
 403                                 "connection_init(%d): connection table full (%d/%d)\n",
 404                                 s, i, dtblsize);
 405 #endif
 406             ldap_pvt_thread_mutex_unlock( &connections_mutex );
 407             return -1;
 408         }
 409     }
 410 #endif
 411
 412     assert( c != NULL );
 413
 414         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 415                 c->c_authmech.bv_val = NULL;
 416                 c->c_authmech.bv_len = 0;
 417                 c->c_dn.bv_val = NULL;
 418                 c->c_dn.bv_len = 0;
 419                 c->c_ndn.bv_val = NULL;
 420                 c->c_ndn.bv_len = 0;
 421                 c->c_cdn.bv_val = NULL;
 422                 c->c_cdn.bv_len = 0;
 423                 c->c_groups = NULL;
 424
 425                 c->c_listener_url.bv_val = NULL;
 426                 c->c_listener_url.bv_len = 0;
 427                 c->c_peer_domain.bv_val = NULL;
 428                 c->c_peer_domain.bv_len = 0;
 429                 c->c_peer_name.bv_val = NULL;
 430                 c->c_peer_name.bv_len = 0;
 431                 c->c_sock_name.bv_val = NULL;
 432                 c->c_sock_name.bv_len = 0;
 433
 434                 LDAP_STAILQ_INIT(&c->c_ops);
 435                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 436
 437                 c->c_sasl_bind_mech.bv_val = NULL;
 438                 c->c_sasl_bind_mech.bv_len = 0;
 439                 c->c_sasl_context = NULL;
 440                 c->c_sasl_extra = NULL;
 441
 442                 c->c_sb = ber_sockbuf_alloc( );
 443
 444                 {
 445                         ber_len_t max = sockbuf_max_incoming;
 446                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 447                 }
 448
 449                 c->c_currentber = NULL;
 450
 451                 /* should check status of thread calls */
 452                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 453                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 454                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 455
 456                 c->c_struct_state = SLAP_C_UNUSED;
 457         }
 458
 459     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 460
 461     assert( c->c_struct_state == SLAP_C_UNUSED );
 462     assert( c->c_authmech.bv_val == NULL );
 463     assert( c->c_dn.bv_val == NULL );
 464     assert( c->c_ndn.bv_val == NULL );
 465     assert( c->c_cdn.bv_val == NULL );
 466     assert( c->c_groups == NULL );
 467     assert( c->c_listener_url.bv_val == NULL );
 468     assert( c->c_peer_domain.bv_val == NULL );
 469     assert( c->c_peer_name.bv_val == NULL );
 470     assert( c->c_sock_name.bv_val == NULL );
 471     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 472     assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 473         assert( c->c_sasl_bind_mech.bv_val == NULL );
 474         assert( c->c_sasl_context == NULL );
 475         assert( c->c_sasl_extra == NULL );
 476         assert( c->c_currentber == NULL );
 477
 478         ber_str2bv( url, 0, 1, &c->c_listener_url );
 479         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 480         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 481         ber_str2bv( sockname, 0, 1, &c->c_sock_name );
 482
 483     c->c_n_ops_received = 0;
 484     c->c_n_ops_executing = 0;
 485     c->c_n_ops_pending = 0;
 486     c->c_n_ops_completed = 0;
 487
 488         c->c_n_get = 0;
 489         c->c_n_read = 0;
 490         c->c_n_write = 0;
 491
 492         /* set to zero until bind, implies LDAP_VERSION3 */
 493         c->c_protocol = 0;
 494
 495 #ifdef SLAPD_MONITOR
 496         c->c_activitytime = c->c_starttime = slap_get_time();
 497 #else
 498         if( global_idletimeout > 0 ) {
 499                 c->c_activitytime = c->c_starttime = slap_get_time();
 500         }
 501 #endif
 502
 503 #ifdef LDAP_CONNECTIONLESS
 504         c->c_is_udp = 0;
 505         if (tls_udp_option == 2)
 506         {
 507                 c->c_is_udp = 1;
 508 #ifdef LDAP_DEBUG
 509         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 510                 LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 511 #endif
 512         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 513                 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 514         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 515                 LBER_SBIOD_LEVEL_PROVIDER, NULL );
 516         } else
 517 #endif
 518         {
 519 #ifdef LDAP_DEBUG
 520         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 521                 LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 522 #endif
 523         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 524                 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 525         }
 526
 527 #ifdef LDAP_DEBUG
 528         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 529                 INT_MAX, (void*)"ldap_" );
 530 #endif
 531
 532         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 533                 c /* non-NULL */ ) < 0 )
 534         {
 535 #ifdef NEW_LOGGING
 536                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 537                            "connection_init: conn %lu  set nonblocking failed\n",
 538                            c->c_connid ));
 539 #else
 540                 Debug( LDAP_DEBUG_ANY,
 541                         "connection_init(%d, %s): set nonblocking failed\n",
 542                         s, c->c_peer_name.bv_val, 0 );
 543 #endif
 544         }
 545
 546     id = c->c_connid = conn_nextid++;
 547
 548     c->c_conn_state = SLAP_C_INACTIVE;
 549     c->c_struct_state = SLAP_C_USED;
 550
 551         c->c_ssf = c->c_transport_ssf = ssf;
 552         c->c_tls_ssf = 0;
 553
 554 #ifdef HAVE_TLS
 555     if ( tls_udp_option == 1 ) {
 556             c->c_is_tls = 1;
 557             c->c_needs_tls_accept = 1;
 558     } else {
 559             c->c_is_tls = 0;
 560             c->c_needs_tls_accept = 0;
 561     }
 562 #endif
 563
 564         slap_sasl_open( c );
 565         slap_sasl_external( c, ssf, authid );
 566
 567     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 568     ldap_pvt_thread_mutex_unlock( &connections_mutex );
 569
 570     backend_connection_init(c);
 571
 572     return id;
 573 }
 574
 575 void connection2anonymous( Connection *c )
 576 {
 577     assert( connections != NULL );
 578     assert( c != NULL );
 579
 580         {
 581                 ber_len_t max = sockbuf_max_incoming;
 582                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 583         }
 584
 585         if(c->c_authmech.bv_val != NULL ) {
 586                 free(c->c_authmech.bv_val);
 587                 c->c_authmech.bv_val = NULL;
 588         }
 589         c->c_authmech.bv_len = 0;
 590
 591     if(c->c_dn.bv_val != NULL) {
 592         free(c->c_dn.bv_val);
 593         c->c_dn.bv_val = NULL;
 594     }
 595     c->c_dn.bv_len = 0;
 596     if(c->c_ndn.bv_val != NULL) {
 597         free(c->c_ndn.bv_val);
 598         c->c_ndn.bv_val = NULL;
 599     }
 600     c->c_ndn.bv_len = 0;
 601
 602         if(c->c_cdn.bv_val != NULL) {
 603                 free(c->c_cdn.bv_val);
 604                 c->c_cdn.bv_val = NULL;
 605         }
 606         c->c_cdn.bv_len = 0;
 607
 608         c->c_authz_backend = NULL;
 609
 610     {
 611         GroupAssertion *g, *n;
 612         for (g = c->c_groups; g; g=n)
 613         {
 614             n = g->ga_next;
 615             free(g);
 616         }
 617         c->c_groups = NULL;
 618     }
 619
 620 }
 621
 622 static void
 623 connection_destroy( Connection *c )
 624 {
 625         /* note: connections_mutex should be locked by caller */
 626     ber_socket_t        sd;
 627     unsigned long       connid;
 628
 629     assert( connections != NULL );
 630     assert( c != NULL );
 631     assert( c->c_struct_state != SLAP_C_UNUSED );
 632     assert( c->c_conn_state != SLAP_C_INVALID );
 633     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 634
 635     /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 636     connid = c->c_connid;
 637
 638     backend_connection_destroy(c);
 639
 640     c->c_protocol = 0;
 641     c->c_connid = -1;
 642
 643     c->c_activitytime = c->c_starttime = 0;
 644
 645         connection2anonymous( c );
 646
 647         if(c->c_listener_url.bv_val != NULL) {
 648                 free(c->c_listener_url.bv_val);
 649                 c->c_listener_url.bv_val = NULL;
 650         }
 651         c->c_listener_url.bv_len = 0;
 652
 653         if(c->c_peer_domain.bv_val != NULL) {
 654                 free(c->c_peer_domain.bv_val);
 655                 c->c_peer_domain.bv_val = NULL;
 656         }
 657         c->c_peer_domain.bv_len = 0;
 658         if(c->c_peer_name.bv_val != NULL) {
 659 #ifdef LDAP_PF_LOCAL
 660                 /*
 661                  * If peer was a domain socket, unlink. Mind you,
 662                  * they may be un-named. Should we leave this to
 663                  * the client?
 664                  */
 665                 if (strncmp(c->c_peer_name.bv_val, "PATH=",
 666                                         sizeof("PATH=") - 1) == 0) {
 667                         char *path = c->c_peer_name.bv_val
 668                                 + sizeof("PATH=") - 1;
 669                         if (path[0] != '\0') {
 670                                 (void)unlink(path);
 671                         }
 672                 }
 673 #endif /* LDAP_PF_LOCAL */
 674
 675                 free(c->c_peer_name.bv_val);
 676                 c->c_peer_name.bv_val = NULL;
 677         }
 678         c->c_peer_name.bv_len = 0;
 679         if(c->c_sock_name.bv_val != NULL) {
 680                 free(c->c_sock_name.bv_val);
 681                 c->c_sock_name.bv_val = NULL;
 682         }
 683         c->c_sock_name.bv_len = 0;
 684
 685         c->c_sasl_bind_in_progress = 0;
 686         if(c->c_sasl_bind_mech.bv_val != NULL) {
 687                 free(c->c_sasl_bind_mech.bv_val);
 688                 c->c_sasl_bind_mech.bv_val = NULL;
 689         }
 690         c->c_sasl_bind_mech.bv_len = 0;
 691
 692         slap_sasl_close( c );
 693
 694         if ( c->c_currentber != NULL ) {
 695                 ber_free( c->c_currentber, 1 );
 696                 c->c_currentber = NULL;
 697         }
 698
 699         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 700         if ( sd != AC_SOCKET_INVALID ) {
 701                 slapd_remove( sd, 0 );
 702
 703                 Statslog( LDAP_DEBUG_STATS,
 704                     "conn=%lu fd=%d closed\n",
 705                         connid, sd, 0, 0, 0 );
 706         }
 707
 708         ber_sockbuf_free( c->c_sb );
 709
 710         c->c_sb = ber_sockbuf_alloc( );
 711
 712         {
 713                 ber_len_t max = sockbuf_max_incoming;
 714                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 715         }
 716
 717     c->c_conn_state = SLAP_C_INVALID;
 718     c->c_struct_state = SLAP_C_UNUSED;
 719 }
 720
 721 int connection_state_closing( Connection *c )
 722 {
 723         /* c_mutex must be locked by caller */
 724
 725         int state;
 726         assert( c != NULL );
 727         assert( c->c_struct_state == SLAP_C_USED );
 728
 729         state = c->c_conn_state;
 730
 731         assert( state != SLAP_C_INVALID );
 732
 733         return state == SLAP_C_CLOSING;
 734 }
 735
 736 static void connection_abandon( Connection *c )
 737 {
 738         /* c_mutex must be locked by caller */
 739
 740         Operation *o;
 741
 742         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
 743                 ldap_pvt_thread_mutex_lock( &o->o_abandonmutex );
 744                 o->o_abandon = 1;
 745                 ldap_pvt_thread_mutex_unlock( &o->o_abandonmutex );
 746         }
 747
 748         /* remove pending operations */
 749         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 750                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 751                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 752                 slap_op_free( o );
 753         }
 754 }
 755
 756 void connection_closing( Connection *c )
 757 {
 758         assert( connections != NULL );
 759         assert( c != NULL );
 760         assert( c->c_struct_state == SLAP_C_USED );
 761         assert( c->c_conn_state != SLAP_C_INVALID );
 762
 763         /* c_mutex must be locked by caller */
 764
 765         if( c->c_conn_state != SLAP_C_CLOSING ) {
 766                 ber_socket_t    sd;
 767
 768                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 769 #ifdef NEW_LOGGING
 770                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 771                            "connection_closing: conn %lu readying socket %d for close.\n",
 772                            c->c_connid, sd ));
 773 #else
 774                 Debug( LDAP_DEBUG_TRACE,
 775                         "connection_closing: readying conn=%lu sd=%d for close\n",
 776                         c->c_connid, sd, 0 );
 777 #endif
 778                 /* update state to closing */
 779                 c->c_conn_state = SLAP_C_CLOSING;
 780
 781                 /* don't listen on this port anymore */
 782                 slapd_clr_read( sd, 1 );
 783
 784                 /* abandon active operations */
 785                 connection_abandon( c );
 786
 787                 /* wake write blocked operations */
 788                 slapd_clr_write( sd, 1 );
 789                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 790         }
 791 }
 792
 793 static void connection_close( Connection *c )
 794 {
 795         ber_socket_t    sd;
 796
 797         assert( connections != NULL );
 798         assert( c != NULL );
 799         assert( c->c_struct_state == SLAP_C_USED );
 800         assert( c->c_conn_state == SLAP_C_CLOSING );
 801
 802         /* note: connections_mutex and c_mutex should be locked by caller */
 803
 804         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 805         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 806 #ifdef NEW_LOGGING
 807                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 808                            "connection_close: conn %lu  deferring sd %d\n",
 809                            c->c_connid, sd ));
 810 #else
 811                 Debug( LDAP_DEBUG_TRACE,
 812                         "connection_close: deferring conn=%lu sd=%d\n",
 813                         c->c_connid, sd, 0 );
 814 #endif
 815                 return;
 816         }
 817
 818 #ifdef NEW_LOGGING
 819         LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
 820                    "connection_close: conn %lu  sd %d\n",
 821                    c->c_connid, sd ));
 822 #else
 823         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 824                 c->c_connid, sd, 0 );
 825 #endif
 826         connection_destroy( c );
 827 }
 828
 829 unsigned long connections_nextid(void)
 830 {
 831         unsigned long id;
 832         assert( connections != NULL );
 833
 834         ldap_pvt_thread_mutex_lock( &connections_mutex );
 835
 836         id = conn_nextid;
 837
 838         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 839
 840         return id;
 841 }
 842
 843 Connection* connection_first( ber_socket_t *index )
 844 {
 845         assert( connections != NULL );
 846         assert( index != NULL );
 847
 848         ldap_pvt_thread_mutex_lock( &connections_mutex );
 849
 850         *index = 0;
 851
 852         return connection_next(NULL, index);
 853 }
 854
 855 Connection* connection_next( Connection *c, ber_socket_t *index )
 856 {
 857         assert( connections != NULL );
 858         assert( index != NULL );
 859         assert( *index <= dtblsize );
 860
 861         if( c != NULL ) {
 862                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 863         }
 864
 865         c = NULL;
 866
 867         for(; *index < dtblsize; (*index)++) {
 868                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 869                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 870 #ifndef HAVE_WINSOCK
 871                         continue;
 872 #else
 873                         break;
 874 #endif
 875                 }
 876
 877                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 878                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 879                         c = &connections[(*index)++];
 880                         break;
 881                 }
 882
 883                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 884                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 885         }
 886
 887         if( c != NULL ) {
 888                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 889         }
 890
 891         return c;
 892 }
 893
 894 void connection_done( Connection *c )
 895 {
 896         assert( connections != NULL );
 897
 898         if( c != NULL ) {
 899                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 900         }
 901
 902         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 903 }
 904
 905 /*
 906  * connection_activity - handle the request operation op on connection
 907  * conn.  This routine figures out what kind of operation it is and
 908  * calls the appropriate stub to handle it.
 909  */
 910
 911 #ifdef SLAPD_MONITOR
 912 #define INCR_OP(var,index) \
 913         do { \
 914                 ldap_pvt_thread_mutex_lock( &num_ops_mutex ); \
 915                 (var)[(index)]++; \
 916                 ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); \
 917         } while (0)
 918 #else /* !SLAPD_MONITOR */
 919 #define INCR_OP(var,index)
 920 #endif /* !SLAPD_MONITOR */
 921
 922 static void *
 923 connection_operation( void *arg_v )
 924 {
 925         int rc;
 926         struct co_arg   *arg = arg_v;
 927         ber_tag_t tag = arg->co_op->o_tag;
 928 #ifdef SLAPD_MONITOR
 929         ber_tag_t oldtag = tag;
 930 #endif /* SLAPD_MONITOR */
 931         Connection *conn = arg->co_conn;
 932
 933         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 934         num_ops_initiated++;
 935         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 936
 937         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 938 #ifdef NEW_LOGGING
 939                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
 940                            "connection_operation: conn %lu  SASL bind in progress (tag=%ld).\n",
 941                            conn->c_connid, (long)tag ));
 942 #else
 943                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 944                         "error: SASL bind in progress (tag=%ld).\n",
 945                         (long) tag, 0, 0 );
 946 #endif
 947                 send_ldap_result( conn, arg->co_op,
 948                         rc = LDAP_OPERATIONS_ERROR,
 949                         NULL, "SASL bind in progress", NULL, NULL );
 950                 goto operations_error;
 951         }
 952
 953         switch ( tag ) {
 954         case LDAP_REQ_BIND:
 955                 INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
 956                 rc = do_bind( conn, arg->co_op );
 957                 break;
 958
 959         case LDAP_REQ_UNBIND:
 960                 INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
 961                 rc = do_unbind( conn, arg->co_op );
 962                 break;
 963
 964         case LDAP_REQ_ADD:
 965                 INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
 966                 rc = do_add( conn, arg->co_op );
 967                 break;
 968
 969         case LDAP_REQ_DELETE:
 970                 INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
 971                 rc = do_delete( conn, arg->co_op );
 972                 break;
 973
 974         case LDAP_REQ_MODRDN:
 975                 INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
 976                 rc = do_modrdn( conn, arg->co_op );
 977                 break;
 978
 979         case LDAP_REQ_MODIFY:
 980                 INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
 981                 rc = do_modify( conn, arg->co_op );
 982                 break;
 983
 984         case LDAP_REQ_COMPARE:
 985                 INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
 986                 rc = do_compare( conn, arg->co_op );
 987                 break;
 988
 989         case LDAP_REQ_SEARCH:
 990                 INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
 991                 rc = do_search( conn, arg->co_op );
 992                 break;
 993
 994         case LDAP_REQ_ABANDON:
 995                 INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
 996                 rc = do_abandon( conn, arg->co_op );
 997                 break;
 998
 999         case LDAP_REQ_EXTENDED:
1000                 INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
1001                 rc = do_extended( conn, arg->co_op );
1002                 break;
1003
1004         default:
1005 #ifdef NEW_LOGGING
1006                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1007                            "connection_operation: conn %lu  unknown LDAP request 0x%lx\n",
1008                            conn->c_connid, tag ));
1009 #else
1010                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
1011                     tag, 0, 0 );
1012 #endif
1013                 arg->co_op->o_tag = LBER_ERROR;
1014                 send_ldap_disconnect( conn, arg->co_op,
1015                         LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
1016                 rc = -1;
1017                 break;
1018         }
1019
1020 #ifdef SLAPD_MONITOR
1021         oldtag = tag;
1022 #endif /* SLAPD_MONITOR */
1023         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
1024
1025 operations_error:
1026         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
1027         num_ops_completed++;
1028 #ifdef SLAPD_MONITOR
1029         switch (oldtag) {
1030         case LDAP_REQ_BIND:
1031                 num_ops_completed_[SLAP_OP_BIND]++;
1032                 break;
1033         case LDAP_REQ_UNBIND:
1034                 num_ops_completed_[SLAP_OP_UNBIND]++;
1035                 break;
1036         case LDAP_REQ_ADD:
1037                 num_ops_completed_[SLAP_OP_ADD]++;
1038                 break;
1039         case LDAP_REQ_DELETE:
1040                 num_ops_completed_[SLAP_OP_DELETE]++;
1041                 break;
1042         case LDAP_REQ_MODRDN:
1043                 num_ops_completed_[SLAP_OP_MODRDN]++;
1044                 break;
1045         case LDAP_REQ_MODIFY:
1046                 num_ops_completed_[SLAP_OP_MODIFY]++;
1047                 break;
1048         case LDAP_REQ_COMPARE:
1049                 num_ops_completed_[SLAP_OP_COMPARE]++;
1050                 break;
1051         case LDAP_REQ_SEARCH:
1052                 num_ops_completed_[SLAP_OP_SEARCH]++;
1053                 break;
1054         case LDAP_REQ_ABANDON:
1055                 num_ops_completed_[SLAP_OP_ABANDON]++;
1056                 break;
1057         case LDAP_REQ_EXTENDED:
1058                 num_ops_completed_[SLAP_OP_EXTENDED]++;
1059                 break;
1060         }
1061 #endif /* SLAPD_MONITOR */
1062         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1063
1064         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1065
1066         conn->c_n_ops_executing--;
1067         conn->c_n_ops_completed++;
1068
1069         LDAP_STAILQ_REMOVE( &conn->c_ops, arg->co_op, slap_op, o_next);
1070         LDAP_STAILQ_NEXT(arg->co_op, o_next) = NULL;
1071         slap_op_free( arg->co_op );
1072         arg->co_op = NULL;
1073         arg->co_conn = NULL;
1074         free( (char *) arg );
1075         arg = NULL;
1076
1077         switch( tag ) {
1078         case LBER_ERROR:
1079         case LDAP_REQ_UNBIND:
1080                 /* c_mutex is locked */
1081                 connection_closing( conn );
1082                 break;
1083
1084         case LDAP_REQ_BIND:
1085                 conn->c_sasl_bind_in_progress =
1086                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1087
1088                 if( conn->c_conn_state == SLAP_C_BINDING) {
1089                         conn->c_conn_state = SLAP_C_ACTIVE;
1090                 }
1091         }
1092
1093         connection_resched( conn );
1094
1095         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1096
1097         return NULL;
1098 }
1099
1100 int connection_read(ber_socket_t s)
1101 {
1102         int rc = 0;
1103         Connection *c;
1104         assert( connections != NULL );
1105
1106         ldap_pvt_thread_mutex_lock( &connections_mutex );
1107
1108         /* get (locked) connection */
1109         c = connection_get( s );
1110
1111         if( c == NULL ) {
1112 #ifdef NEW_LOGGING
1113                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1114                            "connection_read: sock %ld no connection\n",
1115                            (long)s ));
1116 #else
1117                 Debug( LDAP_DEBUG_ANY,
1118                         "connection_read(%ld): no connection!\n",
1119                         (long) s, 0, 0 );
1120 #endif
1121                 slapd_remove(s, 0);
1122
1123                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1124                 return -1;
1125         }
1126
1127         c->c_n_read++;
1128
1129         if( c->c_conn_state == SLAP_C_CLOSING ) {
1130 #ifdef NEW_LOGGING
1131                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1132                            "connection_read: conn %lu connection closing, ignoring input\n",
1133                            c->c_connid));
1134 #else
1135                 Debug( LDAP_DEBUG_TRACE,
1136                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1137                         s, c->c_connid, 0 );
1138 #endif
1139                 connection_return( c );
1140                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1141                 return 0;
1142         }
1143
1144 #ifdef NEW_LOGGING
1145         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1146                    "connection_read: conn %lu  checking for input.\n", c->c_connid ));
1147 #else
1148         Debug( LDAP_DEBUG_TRACE,
1149                 "connection_read(%d): checking for input on id=%lu\n",
1150                 s, c->c_connid, 0 );
1151 #endif
1152
1153 #ifdef HAVE_TLS
1154         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1155                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1156                 if ( rc < 0 ) {
1157 #if 0 /* required by next #if 0 */
1158                         struct timeval tv;
1159                         fd_set rfd;
1160 #endif
1161
1162 #ifdef NEW_LOGGING
1163                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1164                                    "connection_read: conn %lu  TLS accept error, error %d\n",
1165                                    c->c_connid, rc ));
1166 #else
1167                         Debug( LDAP_DEBUG_TRACE,
1168                                 "connection_read(%d): TLS accept error "
1169                                 "error=%d id=%lu, closing\n",
1170                                 s, rc, c->c_connid );
1171 #endif
1172                         c->c_needs_tls_accept = 0;
1173                         /* connections_mutex and c_mutex are locked */
1174                         connection_closing( c );
1175
1176 #if 0
1177                         /* Drain input before close, to allow SSL error codes
1178                          * to propagate to client. */
1179                         FD_ZERO(&rfd);
1180                         FD_SET(s, &rfd);
1181                         for (rc=1; rc>0;)
1182                         {
1183                             tv.tv_sec = 1;
1184                             tv.tv_usec = 0;
1185                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1186                             if (rc == 1)
1187                                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN,
1188                                     NULL);
1189                         }
1190 #endif
1191                         connection_close( c );
1192
1193                 } else if ( rc == 0 ) {
1194                         void *ssl;
1195                         char *authid;
1196
1197                         c->c_needs_tls_accept = 0;
1198
1199                         /* we need to let SASL know */
1200                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1201
1202                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1203                         if( c->c_tls_ssf > c->c_ssf ) {
1204                                 c->c_ssf = c->c_tls_ssf;
1205                         }
1206
1207                         authid = (char *)ldap_pvt_tls_get_peer( ssl );
1208                         slap_sasl_external( c, c->c_tls_ssf, authid );
1209                 }
1210                 connection_return( c );
1211                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1212                 return 0;
1213         }
1214 #endif
1215
1216 #ifdef HAVE_CYRUS_SASL
1217         if ( c->c_sasl_layers ) {
1218                 c->c_sasl_layers = 0;
1219
1220                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
1221
1222                 if( rc != LDAP_SUCCESS ) {
1223 #ifdef NEW_LOGGING
1224                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1225                                    "connection_read: conn %lu SASL install error %d, closing\n",
1226                                    c->c_connid, rc ));
1227 #else
1228                         Debug( LDAP_DEBUG_TRACE,
1229                                 "connection_read(%d): SASL install error "
1230                                 "error=%d id=%lu, closing\n",
1231                                 s, rc, c->c_connid );
1232 #endif
1233                         /* connections_mutex and c_mutex are locked */
1234                         connection_closing( c );
1235                         connection_close( c );
1236                         connection_return( c );
1237                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1238                         return 0;
1239                 }
1240         }
1241 #endif
1242
1243 #define CONNECTION_INPUT_LOOP 1
1244
1245 #ifdef DATA_READY_LOOP
1246         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
1247 #elif CONNECTION_INPUT_LOOP
1248         while(!rc)
1249 #endif
1250         {
1251                 /* How do we do this without getting into a busy loop ? */
1252                 rc = connection_input( c );
1253         }
1254
1255         if( rc < 0 ) {
1256 #ifdef NEW_LOGGING
1257                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1258                            "connection_read: conn %lu  input error %d, closing.\n",
1259                            c->c_connid, rc ));
1260 #else
1261                 Debug( LDAP_DEBUG_TRACE,
1262                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1263                         s, rc, c->c_connid );
1264 #endif
1265                 /* connections_mutex and c_mutex are locked */
1266                 connection_closing( c );
1267                 connection_close( c );
1268                 connection_return( c );
1269                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1270                 return 0;
1271         }
1272
1273         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1274                 slapd_set_read( s, 1 );
1275         }
1276
1277         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1278                 slapd_set_write( s, 1 );
1279         }
1280
1281         connection_return( c );
1282         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1283         return 0;
1284 }
1285
1286 static int
1287 connection_input(
1288     Connection *conn
1289 )
1290 {
1291         Operation *op;
1292         ber_tag_t       tag;
1293         ber_len_t       len;
1294         ber_int_t       msgid;
1295         BerElement      *ber;
1296 #ifdef LDAP_CONNECTIONLESS
1297         Sockaddr        peeraddr;
1298         char            *cdn = NULL;
1299 #endif
1300
1301         if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
1302             == NULL ) {
1303 #ifdef NEW_LOGGING
1304                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1305                            "connection_input: conn %lu  ber_alloc failed.\n",
1306                            conn->c_connid ));
1307 #else
1308                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1309 #endif
1310                 return -1;
1311         }
1312
1313         errno = 0;
1314
1315 #ifdef LDAP_CONNECTIONLESS
1316         if (conn->c_is_udp)
1317         {
1318                 char    peername[sizeof("IP=255.255.255.255:65336")];
1319                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1320                         sizeof(struct sockaddr));
1321                 if (len != sizeof(struct sockaddr))
1322                         return 1;
1323                 sprintf( peername, "IP=%s:%d",
1324                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1325                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1326                 Statslog( LDAP_DEBUG_STATS,
1327                         "conn=%lu UDP request from %s (%s) accepted.\n",
1328                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1329         }
1330 #endif
1331         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1332         if ( tag != LDAP_TAG_MESSAGE ) {
1333                 int err = errno;
1334                 ber_socket_t    sd;
1335
1336                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1337
1338 #ifdef NEW_LOGGING
1339                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1340                            "connection_input: conn %lu  ber_get_next failed, errno %d (%s).\n",
1341                            conn->c_connid, err, sock_errstr(err) ));
1342 #else
1343                 Debug( LDAP_DEBUG_TRACE,
1344                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1345                         sd, err, sock_errstr(err) );
1346 #endif
1347                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1348                         /* log, close and send error */
1349                         ber_free( conn->c_currentber, 1 );
1350                         conn->c_currentber = NULL;
1351
1352                         return -2;
1353                 }
1354                 return 1;
1355         }
1356
1357         ber = conn->c_currentber;
1358         conn->c_currentber = NULL;
1359
1360         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1361                 /* log, close and send error */
1362 #ifdef NEW_LOGGING
1363                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1364                            "connection_input: conn %lu  ber_get_int returns 0x%lx.\n",
1365                            conn->c_connid, tag ));
1366 #else
1367                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1368                     0 );
1369 #endif
1370                 ber_free( ber, 1 );
1371                 return -1;
1372         }
1373
1374         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1375                 /* log, close and send error */
1376 #ifdef NEW_LOGGING
1377                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1378                            "connection_input: conn %lu  ber_peek_tag returns 0x%lx.\n",
1379                            conn->c_connid, tag ));
1380 #else
1381                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1382                     0 );
1383 #endif
1384                 ber_free( ber, 1 );
1385
1386                 return -1;
1387         }
1388
1389 #ifdef LDAP_CONNECTIONLESS
1390         if (conn->c_is_udp) {
1391                 if (tag == LBER_OCTETSTRING) {
1392                         ber_get_stringa( ber, &cdn );
1393                         tag = ber_peek_tag(ber, &len);
1394                 }
1395                 if (tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH) {
1396 #ifdef NEW_LOGGING
1397                     LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1398                                "connection_input: conn %lu  invalid req for UDP 0x%lx.\n",
1399                                conn->c_connid, tag ));
1400 #else
1401                     Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1402                         0 );
1403 #endif
1404                     ber_free( ber, 1 );
1405                     return 0;
1406                 }
1407         }
1408 #endif
1409         if(tag == LDAP_REQ_BIND) {
1410                 /* immediately abandon all exiting operations upon BIND */
1411                 connection_abandon( conn );
1412         }
1413
1414         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1415
1416         op->o_pagedresults_state = conn->c_pagedresults_state;
1417
1418 #ifdef LDAP_CONNECTIONLESS
1419         op->o_peeraddr = peeraddr;
1420         if (cdn) {
1421             ber_str2bv( cdn, 0, 1, &op->o_dn );
1422             op->o_protocol = LDAP_VERSION2;
1423         }
1424 #endif
1425         if ( conn->c_conn_state == SLAP_C_BINDING
1426                 || conn->c_conn_state == SLAP_C_CLOSING )
1427         {
1428 #ifdef NEW_LOGGING
1429                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1430                            "connection_input: conn %lu  deferring operation\n",
1431                            conn->c_connid ));
1432 #else
1433                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1434 #endif
1435                 conn->c_n_ops_pending++;
1436                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1437
1438         } else {
1439                 conn->c_n_ops_executing++;
1440                 connection_op_activate( conn, op );
1441         }
1442
1443 #ifdef NO_THREADS
1444         if ( conn->c_struct_state != SLAP_C_USED ) {
1445                 /* connection must have got closed underneath us */
1446                 return 1;
1447         }
1448 #endif
1449         assert( conn->c_struct_state == SLAP_C_USED );
1450
1451         return 0;
1452 }
1453
1454 static int
1455 connection_resched( Connection *conn )
1456 {
1457         Operation *op;
1458
1459         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1460                 int rc;
1461                 ber_socket_t    sd;
1462                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1463
1464                 /* us trylock to avoid possible deadlock */
1465                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1466
1467                 if( rc ) {
1468 #ifdef NEW_LOGGING
1469                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1470                                    "connection_resched: conn %lu  reaquiring locks.\n",
1471                                    conn->c_connid ));
1472 #else
1473                         Debug( LDAP_DEBUG_TRACE,
1474                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1475                                 conn->c_connid, sd, 0 );
1476 #endif
1477                         /*
1478                          * reaquire locks in the right order...
1479                          * this may allow another thread to close this connection,
1480                          * so recheck state below.
1481                          */
1482                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1483                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1484                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1485                 }
1486
1487                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1488 #ifdef NEW_LOGGING
1489                         LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1490                                    "connection_resched: conn %lu  closed by other thread.\n",
1491                                    conn->c_connid ));
1492 #else
1493                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1494                                 "closed by other thread conn=%lu sd=%d\n",
1495                                 conn->c_connid, sd, 0 );
1496 #endif
1497                 } else {
1498 #ifdef NEW_LOGGING
1499                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1500                                    "connection_resched: conn %lu  attempting closing.\n",
1501                                    conn->c_connid ));
1502 #else
1503                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1504                                 "attempting closing conn=%lu sd=%d\n",
1505                                 conn->c_connid, sd, 0 );
1506 #endif
1507                         connection_close( conn );
1508                 }
1509
1510                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1511                 return 0;
1512         }
1513
1514         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1515                 /* other states need different handling */
1516                 return 0;
1517         }
1518
1519         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1520                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1521                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1522                 /* pending operations should not be marked for abandonment */
1523                 assert(!op->o_abandon);
1524
1525                 conn->c_n_ops_pending--;
1526                 conn->c_n_ops_executing++;
1527
1528                 connection_op_activate( conn, op );
1529
1530                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1531                         break;
1532                 }
1533         }
1534         return 0;
1535 }
1536
1537 static int connection_op_activate( Connection *conn, Operation *op )
1538 {
1539         struct co_arg *arg;
1540         int status;
1541         ber_tag_t tag = op->o_tag;
1542
1543         if(tag == LDAP_REQ_BIND) {
1544                 conn->c_conn_state = SLAP_C_BINDING;
1545         }
1546
1547         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1548         arg->co_conn = conn;
1549         arg->co_op = op;
1550
1551         if (!arg->co_op->o_dn.bv_len) {
1552             arg->co_op->o_authz = conn->c_authz;
1553             arg->co_op->o_dn.bv_val = ch_strdup( conn->c_dn.bv_val ?
1554                 conn->c_dn.bv_val : "" );
1555             arg->co_op->o_ndn.bv_val = ch_strdup( conn->c_ndn.bv_val ?
1556                 conn->c_ndn.bv_val : "" );
1557         }
1558         arg->co_op->o_authtype = conn->c_authtype;
1559         ber_dupbv( &arg->co_op->o_authmech, &conn->c_authmech );
1560
1561         if (!arg->co_op->o_protocol) {
1562             arg->co_op->o_protocol = conn->c_protocol
1563                 ? conn->c_protocol : LDAP_VERSION3;
1564         }
1565         arg->co_op->o_connid = conn->c_connid;
1566
1567         LDAP_STAILQ_INSERT_TAIL( &conn->c_ops, arg->co_op, o_next );
1568
1569         status = ldap_pvt_thread_pool_submit( &connection_pool,
1570                 connection_operation, (void *) arg );
1571
1572         if ( status != 0 ) {
1573 #ifdef NEW_LOGGING
1574                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1575                            "connection_op_activate: conn %lu     thread pool submit failed.\n",
1576                            conn->c_connid ));
1577 #else
1578                 Debug( LDAP_DEBUG_ANY,
1579                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1580 #endif
1581                 /* should move op to pending list */
1582         }
1583
1584         return status;
1585 }
1586
1587 int connection_write(ber_socket_t s)
1588 {
1589         Connection *c;
1590         assert( connections != NULL );
1591
1592         ldap_pvt_thread_mutex_lock( &connections_mutex );
1593
1594         c = connection_get( s );
1595
1596         slapd_clr_write( s, 0);
1597
1598         if( c == NULL ) {
1599 #ifdef NEW_LOGGING
1600                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1601                            "connection_write: sock %ld  no connection!\n",(long)s));
1602 #else
1603                 Debug( LDAP_DEBUG_ANY,
1604                         "connection_write(%ld): no connection!\n",
1605                         (long) s, 0, 0 );
1606 #endif
1607                 slapd_remove(s, 0);
1608                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1609                 return -1;
1610         }
1611
1612         c->c_n_write++;
1613
1614 #ifdef NEW_LOGGING
1615         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1616                    "connection_write conn %lu  waking output.\n",
1617                    c->c_connid ));
1618 #else
1619         Debug( LDAP_DEBUG_TRACE,
1620                 "connection_write(%d): waking output for id=%lu\n",
1621                 s, c->c_connid, 0 );
1622 #endif
1623         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1624
1625         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1626                 slapd_set_read( s, 1 );
1627         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1628                 slapd_set_write( s, 1 );
1629         connection_return( c );
1630         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1631         return 0;
1632 }
1633