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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6
   7 #include "portable.h"
   8
   9 #include <stdio.h>
  10 #include <limits.h>
  11
  12 #include <ac/socket.h>
  13 #include <ac/errno.h>
  14 #include <ac/string.h>
  15 #include <ac/time.h>
  16 #include <ac/unistd.h>
  17
  18 #include "ldap_pvt.h"
  19 #include "lutil.h"
  20 #include "slap.h"
  21
  22 /* protected by connections_mutex */
  23 static ldap_pvt_thread_mutex_t connections_mutex;
  24 static Connection *connections = NULL;
  25 static unsigned long conn_nextid = 0;
  26
  27 /* structure state (protected by connections_mutex) */
  28 #define SLAP_C_UNINITIALIZED    0x00    /* MUST BE ZERO (0) */
  29 #define SLAP_C_UNUSED                   0x01
  30 #define SLAP_C_USED                             0x02
  31
  32 /* connection state (protected by c_mutex ) */
  33 #define SLAP_C_INVALID                  0x00    /* MUST BE ZERO (0) */
  34 #define SLAP_C_INACTIVE                 0x01    /* zero threads */
  35 #define SLAP_C_ACTIVE                   0x02    /* one or more threads */
  36 #define SLAP_C_BINDING                  0x03    /* binding */
  37 #define SLAP_C_CLOSING                  0x04    /* closing */
  38
  39 const char *
  40 connection_state2str( int state )
  41 {
  42         switch( state ) {
  43         case SLAP_C_INVALID:    return "!";
  44         case SLAP_C_INACTIVE:   return "|";
  45         case SLAP_C_ACTIVE:             return "";
  46         case SLAP_C_BINDING:    return "B";
  47         case SLAP_C_CLOSING:    return "C";
  48         }
  49
  50         return "?";
  51 }
  52
  53 static Connection* connection_get( ber_socket_t s );
  54
  55 static int connection_input( Connection *c );
  56 static void connection_close( Connection *c );
  57
  58 static int connection_op_activate( Connection *conn, Operation *op );
  59 static int connection_resched( Connection *conn );
  60 static void connection_abandon( Connection *conn );
  61 static void connection_destroy( Connection *c );
  62
  63 static ldap_pvt_thread_start_t connection_operation;
  64
  65 struct co_arg {
  66         Connection      *co_conn;
  67         Operation       *co_op;
  68 };
  69
  70 /*
  71  * Initialize connection management infrastructure.
  72  */
  73 int connections_init(void)
  74 {
  75         assert( connections == NULL );
  76
  77         if( connections != NULL) {
  78 #ifdef NEW_LOGGING
  79                 LDAP_LOG( CONNECTION, INFO,
  80                            "connections_init:  already initialized.\n", 0, 0, 0 );
  81 #else
  82                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
  83                         0, 0, 0 );
  84 #endif
  85                 return -1;
  86         }
  87
  88         /* should check return of every call */
  89         ldap_pvt_thread_mutex_init( &connections_mutex );
  90
  91         connections = (Connection *) calloc( dtblsize, sizeof(Connection) );
  92
  93         if( connections == NULL ) {
  94 #ifdef NEW_LOGGING
  95                 LDAP_LOG( CONNECTION, ERR,
  96                            "connections_init: allocation (%d * %ld) of connection "
  97                            "array failed\n", dtblsize, (long) sizeof(Connection), 0 );
  98 #else
  99                 Debug( LDAP_DEBUG_ANY,
 100                         "connections_init: allocation (%d*%ld) of connection array failed\n",
 101                         dtblsize, (long) sizeof(Connection), 0 );
 102 #endif
 103                 return -1;
 104         }
 105
 106     assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
 107     assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 108
 109         /*
 110          * per entry initialization of the Connection array initialization
 111          * will be done by connection_init()
 112          */
 113
 114         return 0;
 115 }
 116
 117 /*
 118  * Destroy connection management infrastructure.
 119  */
 120 int connections_destroy(void)
 121 {
 122         ber_socket_t i;
 123
 124         /* should check return of every call */
 125
 126         if( connections == NULL) {
 127 #ifdef NEW_LOGGING
 128                 LDAP_LOG( CONNECTION, INFO,
 129                            "connections_destroy: nothing to destroy.\n", 0, 0, 0 );
 130 #else
 131                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
 132                         0, 0, 0 );
 133 #endif
 134                 return -1;
 135         }
 136
 137         for ( i = 0; i < dtblsize; i++ ) {
 138                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 139                         ber_sockbuf_free( connections[i].c_sb );
 140                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 141                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
 142                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 143                 }
 144         }
 145
 146         free( connections );
 147         connections = NULL;
 148
 149         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 150         return 0;
 151 }
 152
 153 /*
 154  * shutdown all connections
 155  */
 156 int connections_shutdown(void)
 157 {
 158         ber_socket_t i;
 159
 160         ldap_pvt_thread_mutex_lock( &connections_mutex );
 161
 162         for ( i = 0; i < dtblsize; i++ ) {
 163                 if( connections[i].c_struct_state != SLAP_C_USED ) {
 164                         continue;
 165                 }
 166
 167                 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 168
 169                 /* connections_mutex and c_mutex are locked */
 170                 connection_closing( &connections[i] );
 171                 connection_close( &connections[i] );
 172
 173                 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 174         }
 175
 176         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 177
 178         return 0;
 179 }
 180
 181 /*
 182  * Timeout idle connections.
 183  */
 184 int connections_timeout_idle(time_t now)
 185 {
 186         int i = 0;
 187         int connindex;
 188         Connection* c;
 189
 190         for( c = connection_first( &connindex );
 191                 c != NULL;
 192                 c = connection_next( c, &connindex ) )
 193         {
 194                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 195                         /* close it */
 196                         connection_closing( c );
 197                         connection_close( c );
 198                         i++;
 199                 }
 200         }
 201         connection_done( c );
 202
 203         return i;
 204 }
 205
 206 static Connection* connection_get( ber_socket_t s )
 207 {
 208         /* connections_mutex should be locked by caller */
 209
 210         Connection *c;
 211
 212 #ifdef NEW_LOGGING
 213         LDAP_LOG( CONNECTION, ENTRY, "connection_get: socket %ld\n", (long)s, 0, 0 );
 214 #else
 215         Debug( LDAP_DEBUG_ARGS,
 216                 "connection_get(%ld)\n",
 217                 (long) s, 0, 0 );
 218 #endif
 219
 220         assert( connections != NULL );
 221
 222         if(s == AC_SOCKET_INVALID) {
 223                 return NULL;
 224         }
 225
 226 #ifndef HAVE_WINSOCK
 227         c = &connections[s];
 228
 229         assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 230
 231 #else
 232         c = NULL;
 233         {
 234                 ber_socket_t i, sd;
 235
 236                 for(i=0; i<dtblsize; i++) {
 237                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 238                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 239                                 assert( connections[i].c_sb == 0 );
 240                                 break;
 241                         }
 242
 243                         ber_sockbuf_ctrl( connections[i].c_sb,
 244                                 LBER_SB_OPT_GET_FD, &sd );
 245
 246                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 247                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 248                                 assert( sd == AC_SOCKET_INVALID );
 249                                 continue;
 250                         }
 251
 252                         /* state can actually change from used -> unused by resched,
 253                          * so don't assert details here.
 254                          */
 255
 256                         if( sd == s ) {
 257                                 c = &connections[i];
 258                                 break;
 259                         }
 260                 }
 261         }
 262 #endif
 263
 264         if( c != NULL ) {
 265                 ber_socket_t    sd;
 266
 267                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 268
 269                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 270                 if( c->c_struct_state != SLAP_C_USED ) {
 271                         /* connection must have been closed due to resched */
 272
 273                         assert( c->c_conn_state == SLAP_C_INVALID );
 274                         assert( sd == AC_SOCKET_INVALID );
 275
 276 #ifdef NEW_LOGGING
 277                         LDAP_LOG( CONNECTION, ARGS,
 278                                 "connection_get:  connection %d not used\n", s, 0, 0 );
 279 #else
 280                         Debug( LDAP_DEBUG_TRACE,
 281                                 "connection_get(%d): connection not used\n",
 282                                 s, 0, 0 );
 283 #endif
 284
 285                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 286                         return NULL;
 287                 }
 288
 289 #ifdef NEW_LOGGING
 290                 LDAP_LOG( CONNECTION, RESULTS,
 291                         "connection_get: get for %d got connid %lu\n", s, c->c_connid, 0 );
 292 #else
 293                 Debug( LDAP_DEBUG_TRACE,
 294                         "connection_get(%d): got connid=%lu\n",
 295                         s, c->c_connid, 0 );
 296 #endif
 297
 298                 c->c_n_get++;
 299
 300                 assert( c->c_struct_state == SLAP_C_USED );
 301                 assert( c->c_conn_state != SLAP_C_INVALID );
 302                 assert( sd != AC_SOCKET_INVALID );
 303
 304 #ifdef SLAPD_MONITOR
 305                 c->c_activitytime = slap_get_time();
 306 #else
 307                 if( global_idletimeout > 0 ) {
 308                         c->c_activitytime = slap_get_time();
 309                 }
 310 #endif
 311         }
 312
 313         return c;
 314 }
 315
 316 static void connection_return( Connection *c )
 317 {
 318         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 319 }
 320
 321 long connection_init(
 322         ber_socket_t s,
 323         Listener *listener,
 324         const char* dnsname,
 325         const char* peername,
 326         int tls_udp_option,
 327         slap_ssf_t ssf,
 328         const char *authid )
 329 {
 330         unsigned long id;
 331         Connection *c;
 332
 333         assert( connections != NULL );
 334
 335         assert( listener != NULL );
 336         assert( dnsname != NULL );
 337         assert( peername != NULL );
 338
 339 #ifndef HAVE_TLS
 340         assert( tls_udp_option != 1 );
 341 #endif
 342
 343         if( s == AC_SOCKET_INVALID ) {
 344 #ifdef NEW_LOGGING
 345                 LDAP_LOG( CONNECTION, INFO,
 346                            "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 347 #else
 348                 Debug( LDAP_DEBUG_ANY,
 349                        "connection_init(%ld): invalid.\n",
 350                        (long) s, 0, 0 );
 351 #endif
 352                 return -1;
 353         }
 354
 355         assert( s >= 0 );
 356 #ifndef HAVE_WINSOCK
 357         assert( s < dtblsize );
 358 #endif
 359
 360         ldap_pvt_thread_mutex_lock( &connections_mutex );
 361
 362 #ifndef HAVE_WINSOCK
 363         c = &connections[s];
 364
 365 #else
 366         {
 367                 ber_socket_t    i;
 368
 369                 c = NULL;
 370
 371         for( i=0; i < dtblsize; i++) {
 372                 ber_socket_t    sd;
 373
 374             if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 375                 assert( connections[i].c_sb == 0 );
 376                 c = &connections[i];
 377                 break;
 378             }
 379
 380                         sd = AC_SOCKET_INVALID;
 381                         if (connections[i].c_sb != NULL)
 382                         ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd );
 383
 384             if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 385                 assert( sd == AC_SOCKET_INVALID );
 386                 c = &connections[i];
 387                 break;
 388             }
 389
 390             assert( connections[i].c_struct_state == SLAP_C_USED );
 391             assert( connections[i].c_conn_state != SLAP_C_INVALID );
 392             assert( sd != AC_SOCKET_INVALID );
 393         }
 394
 395         if( c == NULL ) {
 396 #ifdef NEW_LOGGING
 397                 LDAP_LOG( CONNECTION, INFO,
 398                            "connection_init: skt %d connection table full "
 399                            "(%d/%d)\n", s, i, dtblsize );
 400 #else
 401                 Debug( LDAP_DEBUG_ANY,
 402                                 "connection_init(%d): connection table full "
 403                                 "(%d/%d)\n", 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_send_ldap_result = slap_send_ldap_result;
 415                 c->c_send_search_entry = slap_send_search_entry;
 416                 c->c_send_search_result = slap_send_search_result;
 417                 c->c_send_search_reference = slap_send_search_reference;
 418                 c->c_send_ldap_extended = slap_send_ldap_extended;
 419
 420                 c->c_authmech.bv_val = NULL;
 421                 c->c_authmech.bv_len = 0;
 422                 c->c_dn.bv_val = NULL;
 423                 c->c_dn.bv_len = 0;
 424                 c->c_ndn.bv_val = NULL;
 425                 c->c_ndn.bv_len = 0;
 426                 c->c_groups = NULL;
 427
 428                 c->c_listener = NULL;
 429                 c->c_peer_domain.bv_val = NULL;
 430                 c->c_peer_domain.bv_len = 0;
 431                 c->c_peer_name.bv_val = NULL;
 432                 c->c_peer_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                 c->c_sasl_bindop = NULL;
 442
 443                 c->c_sb = ber_sockbuf_alloc( );
 444
 445                 {
 446                         ber_len_t max = sockbuf_max_incoming;
 447                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 448                 }
 449
 450                 c->c_currentber = NULL;
 451
 452                 /* should check status of thread calls */
 453                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 454                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 455                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 456
 457                 c->c_struct_state = SLAP_C_UNUSED;
 458         }
 459
 460     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 461
 462     assert( c->c_struct_state == SLAP_C_UNUSED );
 463     assert( c->c_authmech.bv_val == NULL );
 464     assert( c->c_dn.bv_val == NULL );
 465     assert( c->c_ndn.bv_val == NULL );
 466     assert( c->c_groups == NULL );
 467     assert( c->c_listener == NULL );
 468     assert( c->c_peer_domain.bv_val == NULL );
 469     assert( c->c_peer_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_sasl_bindop == NULL );
 476         assert( c->c_currentber == NULL );
 477
 478         c->c_listener = listener;
 479         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 480         ber_str2bv( peername, 0, 1, &c->c_peer_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                 c->c_is_udp = 1;
 506 #ifdef LDAP_DEBUG
 507                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 508                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 509 #endif
 510                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 511                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 512                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 513                         LBER_SBIOD_LEVEL_PROVIDER, NULL );
 514         } else
 515 #endif
 516         {
 517 #ifdef LDAP_DEBUG
 518                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 519                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 520 #endif
 521                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 522                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 523         }
 524
 525 #ifdef LDAP_DEBUG
 526         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 527                 INT_MAX, (void*)"ldap_" );
 528 #endif
 529
 530         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 531                 c /* non-NULL */ ) < 0 )
 532         {
 533 #ifdef NEW_LOGGING
 534                 LDAP_LOG( CONNECTION, INFO,
 535                            "connection_init: conn %lu  set nonblocking failed\n",
 536                            c->c_connid, 0, 0 );
 537 #else
 538                 Debug( LDAP_DEBUG_ANY,
 539                         "connection_init(%d, %s): set nonblocking failed\n",
 540                         s, c->c_peer_name.bv_val, 0 );
 541 #endif
 542         }
 543
 544     id = c->c_connid = conn_nextid++;
 545
 546     c->c_conn_state = SLAP_C_INACTIVE;
 547     c->c_struct_state = SLAP_C_USED;
 548
 549         c->c_ssf = c->c_transport_ssf = ssf;
 550         c->c_tls_ssf = 0;
 551
 552 #ifdef HAVE_TLS
 553     if ( tls_udp_option == 1 ) {
 554             c->c_is_tls = 1;
 555             c->c_needs_tls_accept = 1;
 556     } else {
 557             c->c_is_tls = 0;
 558             c->c_needs_tls_accept = 0;
 559     }
 560 #endif
 561
 562         slap_sasl_open( c );
 563         slap_sasl_external( c, ssf, authid );
 564
 565     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 566     ldap_pvt_thread_mutex_unlock( &connections_mutex );
 567
 568     backend_connection_init(c);
 569
 570     return id;
 571 }
 572
 573 void connection2anonymous( Connection *c )
 574 {
 575         assert( connections != NULL );
 576         assert( c != NULL );
 577
 578         {
 579                 ber_len_t max = sockbuf_max_incoming;
 580                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 581         }
 582
 583         if(c->c_authmech.bv_val != NULL ) {
 584                 free(c->c_authmech.bv_val);
 585                 c->c_authmech.bv_val = NULL;
 586         }
 587         c->c_authmech.bv_len = 0;
 588
 589         if(c->c_dn.bv_val != NULL) {
 590                 free(c->c_dn.bv_val);
 591                 c->c_dn.bv_val = NULL;
 592         }
 593         c->c_dn.bv_len = 0;
 594         if(c->c_ndn.bv_val != NULL) {
 595                 free(c->c_ndn.bv_val);
 596                 c->c_ndn.bv_val = NULL;
 597         }
 598         c->c_ndn.bv_len = 0;
 599
 600         c->c_authz_backend = NULL;
 601
 602         {
 603                 GroupAssertion *g, *n;
 604                 for (g = c->c_groups; g; g=n) {
 605                         n = g->ga_next;
 606                         free(g);
 607                 }
 608                 c->c_groups = NULL;
 609         }
 610 }
 611
 612 static void
 613 connection_destroy( Connection *c )
 614 {
 615         /* note: connections_mutex should be locked by caller */
 616     ber_socket_t        sd;
 617     unsigned long       connid;
 618
 619     assert( connections != NULL );
 620     assert( c != NULL );
 621     assert( c->c_struct_state != SLAP_C_UNUSED );
 622     assert( c->c_conn_state != SLAP_C_INVALID );
 623     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 624
 625     /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 626     connid = c->c_connid;
 627
 628     backend_connection_destroy(c);
 629
 630     c->c_protocol = 0;
 631     c->c_connid = -1;
 632
 633     c->c_activitytime = c->c_starttime = 0;
 634
 635         connection2anonymous( c );
 636         c->c_listener = NULL;
 637
 638         if(c->c_peer_domain.bv_val != NULL) {
 639                 free(c->c_peer_domain.bv_val);
 640                 c->c_peer_domain.bv_val = NULL;
 641         }
 642         c->c_peer_domain.bv_len = 0;
 643         if(c->c_peer_name.bv_val != NULL) {
 644                 free(c->c_peer_name.bv_val);
 645                 c->c_peer_name.bv_val = NULL;
 646         }
 647         c->c_peer_name.bv_len = 0;
 648
 649         c->c_sasl_bind_in_progress = 0;
 650         if(c->c_sasl_bind_mech.bv_val != NULL) {
 651                 free(c->c_sasl_bind_mech.bv_val);
 652                 c->c_sasl_bind_mech.bv_val = NULL;
 653         }
 654         c->c_sasl_bind_mech.bv_len = 0;
 655
 656         slap_sasl_close( c );
 657
 658         if ( c->c_currentber != NULL ) {
 659                 ber_free( c->c_currentber, 1 );
 660                 c->c_currentber = NULL;
 661         }
 662
 663         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 664         if ( sd != AC_SOCKET_INVALID ) {
 665                 slapd_remove( sd, 0 );
 666
 667                 Statslog( LDAP_DEBUG_STATS,
 668                     "conn=%lu fd=%d closed\n",
 669                         connid, sd, 0, 0, 0 );
 670         }
 671
 672         ber_sockbuf_free( c->c_sb );
 673
 674         c->c_sb = ber_sockbuf_alloc( );
 675
 676         {
 677                 ber_len_t max = sockbuf_max_incoming;
 678                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 679         }
 680
 681     c->c_conn_state = SLAP_C_INVALID;
 682     c->c_struct_state = SLAP_C_UNUSED;
 683 }
 684
 685 int connection_state_closing( Connection *c )
 686 {
 687         /* c_mutex must be locked by caller */
 688
 689         int state;
 690         assert( c != NULL );
 691         assert( c->c_struct_state == SLAP_C_USED );
 692
 693         state = c->c_conn_state;
 694
 695         assert( state != SLAP_C_INVALID );
 696
 697         return state == SLAP_C_CLOSING;
 698 }
 699
 700 static void connection_abandon( Connection *c )
 701 {
 702         /* c_mutex must be locked by caller */
 703
 704         Operation *o;
 705
 706         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
 707                 o->o_abandon = 1;
 708         }
 709
 710         /* remove pending operations */
 711         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 712                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 713                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 714                 slap_op_free( o );
 715         }
 716 }
 717
 718 void connection_closing( Connection *c )
 719 {
 720         assert( connections != NULL );
 721         assert( c != NULL );
 722         assert( c->c_struct_state == SLAP_C_USED );
 723         assert( c->c_conn_state != SLAP_C_INVALID );
 724
 725         /* c_mutex must be locked by caller */
 726
 727         if( c->c_conn_state != SLAP_C_CLOSING ) {
 728                 ber_socket_t    sd;
 729
 730                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 731 #ifdef NEW_LOGGING
 732                 LDAP_LOG( CONNECTION, DETAIL1,
 733                            "connection_closing: conn %lu readying socket %d for close.\n",
 734                            c->c_connid, sd, 0 );
 735 #else
 736                 Debug( LDAP_DEBUG_TRACE,
 737                         "connection_closing: readying conn=%lu sd=%d for close\n",
 738                         c->c_connid, sd, 0 );
 739 #endif
 740                 /* update state to closing */
 741                 c->c_conn_state = SLAP_C_CLOSING;
 742
 743                 /* don't listen on this port anymore */
 744                 slapd_clr_read( sd, 1 );
 745
 746                 /* abandon active operations */
 747                 connection_abandon( c );
 748
 749                 /* wake write blocked operations */
 750                 slapd_clr_write( sd, 1 );
 751                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 752         }
 753 }
 754
 755 static void connection_close( Connection *c )
 756 {
 757         ber_socket_t    sd;
 758
 759         assert( connections != NULL );
 760         assert( c != NULL );
 761         assert( c->c_struct_state == SLAP_C_USED );
 762         assert( c->c_conn_state == SLAP_C_CLOSING );
 763
 764         /* note: connections_mutex and c_mutex should be locked by caller */
 765
 766         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 767         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 768 #ifdef NEW_LOGGING
 769                 LDAP_LOG( CONNECTION, DETAIL1,
 770                            "connection_close: conn %lu  deferring sd %d\n",
 771                            c->c_connid, sd, 0 );
 772 #else
 773                 Debug( LDAP_DEBUG_TRACE,
 774                         "connection_close: deferring conn=%lu sd=%d\n",
 775                         c->c_connid, sd, 0 );
 776 #endif
 777                 return;
 778         }
 779
 780 #ifdef NEW_LOGGING
 781         LDAP_LOG( CONNECTION, RESULTS,
 782                    "connection_close: conn %lu  sd %d\n", c->c_connid, sd, 0 );
 783 #else
 784         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 785                 c->c_connid, sd, 0 );
 786 #endif
 787         connection_destroy( c );
 788 }
 789
 790 unsigned long connections_nextid(void)
 791 {
 792         unsigned long id;
 793         assert( connections != NULL );
 794
 795         ldap_pvt_thread_mutex_lock( &connections_mutex );
 796
 797         id = conn_nextid;
 798
 799         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 800
 801         return id;
 802 }
 803
 804 Connection* connection_first( ber_socket_t *index )
 805 {
 806         assert( connections != NULL );
 807         assert( index != NULL );
 808
 809         ldap_pvt_thread_mutex_lock( &connections_mutex );
 810
 811         *index = 0;
 812
 813         return connection_next(NULL, index);
 814 }
 815
 816 Connection* connection_next( Connection *c, ber_socket_t *index )
 817 {
 818         assert( connections != NULL );
 819         assert( index != NULL );
 820         assert( *index <= dtblsize );
 821
 822         if( c != NULL ) {
 823                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 824         }
 825
 826         c = NULL;
 827
 828         for(; *index < dtblsize; (*index)++) {
 829                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 830                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 831 #ifndef HAVE_WINSOCK
 832                         continue;
 833 #else
 834                         break;
 835 #endif
 836                 }
 837
 838                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 839                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 840                         c = &connections[(*index)++];
 841                         break;
 842                 }
 843
 844                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 845                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 846         }
 847
 848         if( c != NULL ) {
 849                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 850         }
 851
 852         return c;
 853 }
 854
 855 void connection_done( Connection *c )
 856 {
 857         assert( connections != NULL );
 858
 859         if( c != NULL ) {
 860                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 861         }
 862
 863         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 864 }
 865
 866 /*
 867  * connection_activity - handle the request operation op on connection
 868  * conn.  This routine figures out what kind of operation it is and
 869  * calls the appropriate stub to handle it.
 870  */
 871
 872 #ifdef SLAPD_MONITOR
 873 #define INCR_OP(var,index) \
 874         do { \
 875                 ldap_pvt_thread_mutex_lock( &num_ops_mutex ); \
 876                 (var)[(index)]++; \
 877                 ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); \
 878         } while (0)
 879 #else /* !SLAPD_MONITOR */
 880 #define INCR_OP(var,index)
 881 #endif /* !SLAPD_MONITOR */
 882
 883 static void *
 884 connection_operation( void *ctx, void *arg_v )
 885 {
 886         int rc;
 887         struct co_arg   *arg = arg_v;
 888         ber_tag_t tag = arg->co_op->o_tag;
 889 #ifdef SLAPD_MONITOR
 890         ber_tag_t oldtag = tag;
 891 #endif /* SLAPD_MONITOR */
 892         Connection *conn = arg->co_conn;
 893
 894         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 895         num_ops_initiated++;
 896         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 897
 898         arg->co_op->o_threadctx = ctx;
 899
 900         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 901 #ifdef NEW_LOGGING
 902                 LDAP_LOG( CONNECTION, ERR,
 903                         "connection_operation: conn %lu SASL bind in progress (tag=%ld).\n",
 904                         conn->c_connid, (long)tag, 0 );
 905 #else
 906                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 907                         "error: SASL bind in progress (tag=%ld).\n",
 908                         (long) tag, 0, 0 );
 909 #endif
 910                 send_ldap_result( conn, arg->co_op,
 911                         rc = LDAP_OPERATIONS_ERROR,
 912                         NULL, "SASL bind in progress", NULL, NULL );
 913                 goto operations_error;
 914         }
 915
 916         switch ( tag ) {
 917         case LDAP_REQ_BIND:
 918                 INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
 919                 rc = do_bind( conn, arg->co_op );
 920                 break;
 921
 922         case LDAP_REQ_UNBIND:
 923                 INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
 924                 rc = do_unbind( conn, arg->co_op );
 925                 break;
 926
 927         case LDAP_REQ_ADD:
 928                 INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
 929                 rc = do_add( conn, arg->co_op );
 930                 break;
 931
 932         case LDAP_REQ_DELETE:
 933                 INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
 934                 rc = do_delete( conn, arg->co_op );
 935                 break;
 936
 937         case LDAP_REQ_MODRDN:
 938                 INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
 939                 rc = do_modrdn( conn, arg->co_op );
 940                 break;
 941
 942         case LDAP_REQ_MODIFY:
 943                 INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
 944                 rc = do_modify( conn, arg->co_op );
 945                 break;
 946
 947         case LDAP_REQ_COMPARE:
 948                 INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
 949                 rc = do_compare( conn, arg->co_op );
 950                 break;
 951
 952         case LDAP_REQ_SEARCH:
 953                 INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
 954                 rc = do_search( conn, arg->co_op );
 955                 break;
 956
 957         case LDAP_REQ_ABANDON:
 958                 INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
 959                 rc = do_abandon( conn, arg->co_op );
 960                 break;
 961
 962         case LDAP_REQ_EXTENDED:
 963                 INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
 964                 rc = do_extended( conn, arg->co_op );
 965                 break;
 966
 967         default:
 968 #ifdef NEW_LOGGING
 969                 LDAP_LOG( CONNECTION, INFO,
 970                            "connection_operation: conn %lu  unknown LDAP request 0x%lx\n",
 971                            conn->c_connid, tag, 0  );
 972 #else
 973                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
 974                     tag, 0, 0 );
 975 #endif
 976                 arg->co_op->o_tag = LBER_ERROR;
 977                 send_ldap_disconnect( conn, arg->co_op,
 978                         LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
 979                 rc = -1;
 980                 break;
 981         }
 982
 983 #ifdef SLAPD_MONITOR
 984         oldtag = tag;
 985 #endif /* SLAPD_MONITOR */
 986         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
 987
 988 operations_error:
 989         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 990         num_ops_completed++;
 991 #ifdef SLAPD_MONITOR
 992         switch (oldtag) {
 993         case LDAP_REQ_BIND:
 994                 num_ops_completed_[SLAP_OP_BIND]++;
 995                 break;
 996         case LDAP_REQ_UNBIND:
 997                 num_ops_completed_[SLAP_OP_UNBIND]++;
 998                 break;
 999         case LDAP_REQ_ADD:
1000                 num_ops_completed_[SLAP_OP_ADD]++;
1001                 break;
1002         case LDAP_REQ_DELETE:
1003                 num_ops_completed_[SLAP_OP_DELETE]++;
1004                 break;
1005         case LDAP_REQ_MODRDN:
1006                 num_ops_completed_[SLAP_OP_MODRDN]++;
1007                 break;
1008         case LDAP_REQ_MODIFY:
1009                 num_ops_completed_[SLAP_OP_MODIFY]++;
1010                 break;
1011         case LDAP_REQ_COMPARE:
1012                 num_ops_completed_[SLAP_OP_COMPARE]++;
1013                 break;
1014         case LDAP_REQ_SEARCH:
1015                 num_ops_completed_[SLAP_OP_SEARCH]++;
1016                 break;
1017         case LDAP_REQ_ABANDON:
1018                 num_ops_completed_[SLAP_OP_ABANDON]++;
1019                 break;
1020         case LDAP_REQ_EXTENDED:
1021                 num_ops_completed_[SLAP_OP_EXTENDED]++;
1022                 break;
1023         }
1024 #endif /* SLAPD_MONITOR */
1025         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1026
1027         if ( arg->co_op->o_cancel == LDAP_CANCEL_REQ )
1028                 arg->co_op->o_cancel = LDAP_TOO_LATE;
1029
1030         while ( arg->co_op->o_cancel != LDAP_CANCEL_NONE &&
1031                 arg->co_op->o_cancel != LDAP_CANCEL_ACK  &&
1032                 arg->co_op->o_cancel != LDAP_CANCEL_NOTDONE ) {
1033                         ldap_pvt_thread_yield();
1034         }
1035
1036         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1037
1038         conn->c_n_ops_executing--;
1039         conn->c_n_ops_completed++;
1040
1041         LDAP_STAILQ_REMOVE( &conn->c_ops, arg->co_op, slap_op, o_next);
1042         LDAP_STAILQ_NEXT(arg->co_op, o_next) = NULL;
1043 #ifdef LDAP_CLIENT_UPDATE
1044         if ( !( arg->co_op->o_clientupdate_type & SLAP_LCUP_PERSIST ) )
1045 #endif /* LDAP_CLIENT_UPDATE */
1046         {
1047                 slap_op_free( arg->co_op );
1048         }
1049         arg->co_op = NULL;
1050         arg->co_conn = NULL;
1051         free( (char *) arg );
1052         arg = NULL;
1053
1054         switch( tag ) {
1055         case LBER_ERROR:
1056         case LDAP_REQ_UNBIND:
1057                 /* c_mutex is locked */
1058                 connection_closing( conn );
1059                 break;
1060
1061         case LDAP_REQ_BIND:
1062                 conn->c_sasl_bind_in_progress =
1063                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1064
1065                 if( conn->c_conn_state == SLAP_C_BINDING) {
1066                         conn->c_conn_state = SLAP_C_ACTIVE;
1067                 }
1068         }
1069
1070         connection_resched( conn );
1071
1072         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1073
1074         return NULL;
1075 }
1076
1077 int connection_read(ber_socket_t s)
1078 {
1079         int rc = 0;
1080         Connection *c;
1081
1082         assert( connections != NULL );
1083
1084         ldap_pvt_thread_mutex_lock( &connections_mutex );
1085
1086         /* get (locked) connection */
1087         c = connection_get( s );
1088
1089         if( c == NULL ) {
1090 #ifdef NEW_LOGGING
1091                 LDAP_LOG( CONNECTION, INFO,
1092                         "connection_read: sock %ld no connection\n", (long)s, 0, 0 );
1093 #else
1094                 Debug( LDAP_DEBUG_ANY,
1095                         "connection_read(%ld): no connection!\n",
1096                         (long) s, 0, 0 );
1097 #endif
1098                 slapd_remove(s, 0);
1099
1100                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1101                 return -1;
1102         }
1103
1104         c->c_n_read++;
1105
1106         if( c->c_conn_state == SLAP_C_CLOSING ) {
1107 #ifdef NEW_LOGGING
1108                 LDAP_LOG( CONNECTION, INFO,
1109                         "connection_read: conn %lu connection closing, ignoring input\n",
1110                         c->c_connid, 0, 0 );
1111 #else
1112                 Debug( LDAP_DEBUG_TRACE,
1113                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1114                         s, c->c_connid, 0 );
1115 #endif
1116                 connection_return( c );
1117                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1118                 return 0;
1119         }
1120
1121 #ifdef NEW_LOGGING
1122         LDAP_LOG( CONNECTION, DETAIL1,
1123                    "connection_read: conn %lu  checking for input.\n",
1124                    c->c_connid, 0, 0  );
1125 #else
1126         Debug( LDAP_DEBUG_TRACE,
1127                 "connection_read(%d): checking for input on id=%lu\n",
1128                 s, c->c_connid, 0 );
1129 #endif
1130
1131 #ifdef HAVE_TLS
1132         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1133                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1134                 if ( rc < 0 ) {
1135 #if 0 /* required by next #if 0 */
1136                         struct timeval tv;
1137                         fd_set rfd;
1138 #endif
1139
1140 #ifdef NEW_LOGGING
1141                         LDAP_LOG( CONNECTION, ERR,
1142                                    "connection_read: conn %lu  TLS accept error, error %d\n",
1143                                    c->c_connid, rc, 0 );
1144 #else
1145                         Debug( LDAP_DEBUG_TRACE,
1146                                 "connection_read(%d): TLS accept error "
1147                                 "error=%d id=%lu, closing\n",
1148                                 s, rc, c->c_connid );
1149 #endif
1150                         c->c_needs_tls_accept = 0;
1151                         /* connections_mutex and c_mutex are locked */
1152                         connection_closing( c );
1153
1154 #if 0
1155                         /* Drain input before close, to allow SSL error codes
1156                          * to propagate to client. */
1157                         FD_ZERO(&rfd);
1158                         FD_SET(s, &rfd);
1159                         for (rc=1; rc>0;) {
1160                             tv.tv_sec = 1;
1161                             tv.tv_usec = 0;
1162                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1163                             if (rc == 1) {
1164                                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL);
1165                                 }
1166                         }
1167 #endif
1168                         connection_close( c );
1169
1170                 } else if ( rc == 0 ) {
1171                         void *ssl;
1172                         struct berval authid = { 0, NULL };
1173
1174                         c->c_needs_tls_accept = 0;
1175
1176                         /* we need to let SASL know */
1177                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1178
1179                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1180                         if( c->c_tls_ssf > c->c_ssf ) {
1181                                 c->c_ssf = c->c_tls_ssf;
1182                         }
1183
1184                         rc = dnX509peerNormalize( ssl, &authid );
1185                         if ( rc != LDAP_SUCCESS ) {
1186 #ifdef NEW_LOGGING
1187                                 LDAP_LOG( CONNECTION, INFO,
1188                                         "connection_read: conn %lu unable to get TLS client DN, "
1189                                         "error %d\n", c->c_connid, rc, 0 );
1190 #else
1191                                 Debug( LDAP_DEBUG_TRACE,
1192                                 "connection_read(%d): unable to get TLS client DN "
1193                                 "error=%d id=%lu\n",
1194                                 s, rc, c->c_connid );
1195 #endif
1196                         }
1197                         slap_sasl_external( c, c->c_tls_ssf, authid.bv_val );
1198                         if ( authid.bv_val )    free( authid.bv_val );
1199                 }
1200
1201                 /* if success and data is ready, fall thru to data input loop */
1202                 if( rc != 0 ||
1203                         !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1204                 {
1205                         connection_return( c );
1206                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1207                         return 0;
1208                 }
1209         }
1210 #endif
1211
1212 #ifdef HAVE_CYRUS_SASL
1213         if ( c->c_sasl_layers ) {
1214                 c->c_sasl_layers = 0;
1215
1216                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
1217
1218                 if( rc != LDAP_SUCCESS ) {
1219 #ifdef NEW_LOGGING
1220                         LDAP_LOG( CONNECTION, ERR,
1221                                 "connection_read: conn %lu SASL install error %d, closing\n",
1222                                 c->c_connid, rc, 0 );
1223 #else
1224                         Debug( LDAP_DEBUG_TRACE,
1225                                 "connection_read(%d): SASL install error "
1226                                 "error=%d id=%lu, closing\n",
1227                                 s, rc, c->c_connid );
1228 #endif
1229                         /* connections_mutex and c_mutex are locked */
1230                         connection_closing( c );
1231                         connection_close( c );
1232                         connection_return( c );
1233                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1234                         return 0;
1235                 }
1236         }
1237 #endif
1238
1239 #define CONNECTION_INPUT_LOOP 1
1240 /* #define      DATA_READY_LOOP 1 */
1241
1242         do
1243         {
1244                 /* How do we do this without getting into a busy loop ? */
1245                 rc = connection_input( c );
1246         }
1247 #ifdef DATA_READY_LOOP
1248         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) );
1249 #elif CONNECTION_INPUT_LOOP
1250         while(!rc);
1251 #else
1252         while(0);
1253 #endif
1254
1255         if( rc < 0 ) {
1256 #ifdef NEW_LOGGING
1257                 LDAP_LOG( CONNECTION, ERR,
1258                         "connection_read: conn %lu  input error %d, closing.\n",
1259                         c->c_connid, rc, 0 );
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 &&
1302                 ( conn->c_currentber = ber_alloc()) == NULL )
1303         {
1304 #ifdef NEW_LOGGING
1305                 LDAP_LOG( CONNECTION, ERR,
1306                         "connection_input: conn %lu  ber_alloc failed.\n",
1307                         conn->c_connid, 0, 0 );
1308 #else
1309                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1310 #endif
1311                 return -1;
1312         }
1313
1314         errno = 0;
1315
1316 #ifdef LDAP_CONNECTIONLESS
1317         if ( conn->c_is_udp ) {
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, 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, ERR,
1364                         "connection_input: conn %lu  ber_get_int returns 0x%lx.\n",
1365                         conn->c_connid, tag, 0 );
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, ERR,
1378                            "connection_input: conn %lu  ber_peek_tag returns 0x%lx.\n",
1379                            conn->c_connid, tag, 0 );
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, ERR,
1398                                "connection_input: conn %lu  invalid req for UDP 0x%lx.\n",
1399                                conn->c_connid, tag, 0 );
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_conn = conn;
1417         op->vrFilter = NULL;
1418         op->o_pagedresults_state = conn->c_pagedresults_state;
1419 #ifdef LDAP_CONNECTIONLESS
1420         op->o_peeraddr = peeraddr;
1421         if (cdn ) {
1422             ber_str2bv( cdn, 0, 1, &op->o_dn );
1423             op->o_protocol = LDAP_VERSION2;
1424         }
1425         if (conn->c_is_udp) {
1426                 int rc;
1427
1428                 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1429                 if (op->o_res_ber == NULL)
1430                         return 1;
1431
1432                 rc = ber_write(op->o_res_ber, (char *)&op->o_peeraddr, sizeof(struct sockaddr), 0);
1433                 if (rc != sizeof(struct sockaddr)) {
1434 #ifdef NEW_LOGGING
1435                         LDAP_LOG( CONNECTION, INFO,
1436                                 "connection_input: conn %lu  ber_write failed\n",
1437                                 conn->c_connid, 0, 0 );
1438 #else
1439                         Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1440 #endif
1441                         return 1;
1442                 }
1443
1444                 if (conn->c_protocol == LDAP_VERSION2) {
1445                         rc = ber_printf(op->o_res_ber, "{i{" /*}}*/, op->o_msgid);
1446                         if (rc == -1) {
1447 #ifdef NEW_LOGGING
1448                                 LDAP_LOG( CONNECTION, INFO,
1449                                         "connection_input: conn %lu  put outer sequence failed\n",
1450                                         conn->c_connid, 0, 0 );
1451 #else
1452                                 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1453 #endif
1454                                 return rc;
1455                         }
1456                 }
1457         }
1458 #endif /* LDAP_CONNECTIONLESS */
1459
1460         if ( conn->c_conn_state == SLAP_C_BINDING
1461                 || conn->c_conn_state == SLAP_C_CLOSING )
1462         {
1463 #ifdef NEW_LOGGING
1464                 LDAP_LOG( CONNECTION, INFO,
1465                         "connection_input: conn %lu  deferring operation\n",
1466                         conn->c_connid, 0, 0 );
1467 #else
1468                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1469 #endif
1470                 conn->c_n_ops_pending++;
1471                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1472
1473         } else {
1474                 conn->c_n_ops_executing++;
1475                 connection_op_activate( conn, op );
1476         }
1477
1478 #ifdef NO_THREADS
1479         if ( conn->c_struct_state != SLAP_C_USED ) {
1480                 /* connection must have got closed underneath us */
1481                 return 1;
1482         }
1483 #endif
1484         assert( conn->c_struct_state == SLAP_C_USED );
1485
1486         return 0;
1487 }
1488
1489 static int
1490 connection_resched( Connection *conn )
1491 {
1492         Operation *op;
1493
1494         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1495                 int rc;
1496                 ber_socket_t    sd;
1497                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1498
1499                 /* us trylock to avoid possible deadlock */
1500                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1501
1502                 if( rc ) {
1503 #ifdef NEW_LOGGING
1504                         LDAP_LOG( CONNECTION, DETAIL1,
1505                                 "connection_resched: conn %lu  reaquiring locks.\n",
1506                                 conn->c_connid, 0, 0 );
1507 #else
1508                         Debug( LDAP_DEBUG_TRACE,
1509                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1510                                 conn->c_connid, sd, 0 );
1511 #endif
1512                         /*
1513                          * reaquire locks in the right order...
1514                          * this may allow another thread to close this connection,
1515                          * so recheck state below.
1516                          */
1517                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1518                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1519                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1520                 }
1521
1522                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1523 #ifdef NEW_LOGGING
1524                         LDAP_LOG( CONNECTION, INFO,
1525                                 "connection_resched: conn %lu  closed by other thread.\n",
1526                                 conn->c_connid, 0, 0 );
1527 #else
1528                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1529                                 "closed by other thread conn=%lu sd=%d\n",
1530                                 conn->c_connid, sd, 0 );
1531 #endif
1532                 } else {
1533 #ifdef NEW_LOGGING
1534                         LDAP_LOG( CONNECTION, DETAIL1,
1535                                 "connection_resched: conn %lu  attempting closing.\n",
1536                                 conn->c_connid, 0, 0 );
1537 #else
1538                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1539                                 "attempting closing conn=%lu sd=%d\n",
1540                                 conn->c_connid, sd, 0 );
1541 #endif
1542                         connection_close( conn );
1543                 }
1544
1545                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1546                 return 0;
1547         }
1548
1549         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1550                 /* other states need different handling */
1551                 return 0;
1552         }
1553
1554         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1555                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1556                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1557                 /* pending operations should not be marked for abandonment */
1558                 assert(!op->o_abandon);
1559
1560                 conn->c_n_ops_pending--;
1561                 conn->c_n_ops_executing++;
1562
1563                 connection_op_activate( conn, op );
1564
1565                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1566                         break;
1567                 }
1568         }
1569         return 0;
1570 }
1571
1572 static int connection_op_activate( Connection *conn, Operation *op )
1573 {
1574         struct co_arg *arg;
1575         int status;
1576         ber_tag_t tag = op->o_tag;
1577
1578         if(tag == LDAP_REQ_BIND) {
1579                 conn->c_conn_state = SLAP_C_BINDING;
1580         }
1581
1582         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1583         arg->co_conn = conn;
1584         arg->co_op = op;
1585
1586         if (!arg->co_op->o_dn.bv_len) {
1587             arg->co_op->o_authz = conn->c_authz;
1588             arg->co_op->o_dn.bv_val = ch_strdup( conn->c_dn.bv_val ?
1589                 conn->c_dn.bv_val : "" );
1590             arg->co_op->o_ndn.bv_val = ch_strdup( conn->c_ndn.bv_val ?
1591                 conn->c_ndn.bv_val : "" );
1592         }
1593         arg->co_op->o_authtype = conn->c_authtype;
1594         ber_dupbv( &arg->co_op->o_authmech, &conn->c_authmech );
1595
1596         if (!arg->co_op->o_protocol) {
1597             arg->co_op->o_protocol = conn->c_protocol
1598                 ? conn->c_protocol : LDAP_VERSION3;
1599         }
1600         arg->co_op->o_connid = conn->c_connid;
1601
1602         LDAP_STAILQ_INSERT_TAIL( &conn->c_ops, arg->co_op, o_next );
1603
1604         status = ldap_pvt_thread_pool_submit( &connection_pool,
1605                 connection_operation, (void *) arg );
1606
1607         if ( status != 0 ) {
1608 #ifdef NEW_LOGGING
1609                 LDAP_LOG( CONNECTION, ERR,
1610                         "connection_op_activate: conn %lu        thread pool submit failed.\n",
1611                         conn->c_connid, 0, 0 );
1612 #else
1613                 Debug( LDAP_DEBUG_ANY,
1614                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1615 #endif
1616                 /* should move op to pending list */
1617         }
1618
1619         return status;
1620 }
1621
1622 int connection_write(ber_socket_t s)
1623 {
1624         Connection *c;
1625
1626         assert( connections != NULL );
1627
1628         ldap_pvt_thread_mutex_lock( &connections_mutex );
1629
1630         c = connection_get( s );
1631
1632         slapd_clr_write( s, 0);
1633
1634         if( c == NULL ) {
1635 #ifdef NEW_LOGGING
1636                 LDAP_LOG( CONNECTION, ERR,
1637                         "connection_write: sock %ld  no connection!\n", (long)s, 0, 0);
1638 #else
1639                 Debug( LDAP_DEBUG_ANY,
1640                         "connection_write(%ld): no connection!\n",
1641                         (long) s, 0, 0 );
1642 #endif
1643                 slapd_remove(s, 0);
1644                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1645                 return -1;
1646         }
1647
1648         c->c_n_write++;
1649
1650 #ifdef NEW_LOGGING
1651         LDAP_LOG( CONNECTION, DETAIL1,
1652                 "connection_write conn %lu  waking output.\n", c->c_connid, 0, 0 );
1653 #else
1654         Debug( LDAP_DEBUG_TRACE,
1655                 "connection_write(%d): waking output for id=%lu\n",
1656                 s, c->c_connid, 0 );
1657 #endif
1658         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1659
1660         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1661                 slapd_set_read( s, 1 );
1662         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1663                 slapd_set_write( s, 1 );
1664         connection_return( c );
1665         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1666         return 0;
1667 }
1668