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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6
   7 #include "portable.h"
   8
   9 #include <stdio.h>
  10 #include <limits.h>
  11
  12 #include <ac/socket.h>
  13 #include <ac/errno.h>
  14 #include <ac/string.h>
  15 #include <ac/time.h>
  16 #include <ac/unistd.h>
  17
  18 #include "ldap_pvt.h"
  19 #include "lutil.h"
  20 #include "slap.h"
  21
  22 /* protected by connections_mutex */
  23 static ldap_pvt_thread_mutex_t connections_mutex;
  24 static Connection *connections = NULL;
  25 static unsigned long conn_nextid = 0;
  26
  27 /* structure state (protected by connections_mutex) */
  28 #define SLAP_C_UNINITIALIZED    0x00    /* MUST BE ZERO (0) */
  29 #define SLAP_C_UNUSED                   0x01
  30 #define SLAP_C_USED                             0x02
  31
  32 /* connection state (protected by c_mutex ) */
  33 #define SLAP_C_INVALID                  0x00    /* MUST BE ZERO (0) */
  34 #define SLAP_C_INACTIVE                 0x01    /* zero threads */
  35 #define SLAP_C_ACTIVE                   0x02    /* one or more threads */
  36 #define SLAP_C_BINDING                  0x03    /* binding */
  37 #define SLAP_C_CLOSING                  0x04    /* closing */
  38
  39 const char *
  40 connection_state2str( int state )
  41 {
  42         switch( state ) {
  43         case SLAP_C_INVALID:    return "!";
  44         case SLAP_C_INACTIVE:   return "|";
  45         case SLAP_C_ACTIVE:             return "";
  46         case SLAP_C_BINDING:    return "B";
  47         case SLAP_C_CLOSING:    return "C";
  48         }
  49
  50         return "?";
  51 }
  52
  53 static Connection* connection_get( ber_socket_t s );
  54
  55 static int connection_input( Connection *c );
  56 static void connection_close( Connection *c );
  57
  58 static int connection_op_activate( Connection *conn, Operation *op );
  59 static int connection_resched( Connection *conn );
  60 static void connection_abandon( Connection *conn );
  61 static void connection_destroy( Connection *c );
  62
  63 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 (%d/%d)\n",
 399                            s, i, dtblsize );
 400 #else
 401                 Debug( LDAP_DEBUG_ANY,
 402                                 "connection_init(%d): connection table full (%d/%d)\n",
 403                                 s, i, dtblsize);
 404 #endif
 405             ldap_pvt_thread_mutex_unlock( &connections_mutex );
 406             return -1;
 407         }
 408     }
 409 #endif
 410
 411     assert( c != NULL );
 412
 413         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 414                 c->c_authmech.bv_val = NULL;
 415                 c->c_authmech.bv_len = 0;
 416                 c->c_dn.bv_val = NULL;
 417                 c->c_dn.bv_len = 0;
 418                 c->c_ndn.bv_val = NULL;
 419                 c->c_ndn.bv_len = 0;
 420                 c->c_groups = NULL;
 421
 422                 c->c_listener = NULL;
 423                 c->c_peer_domain.bv_val = NULL;
 424                 c->c_peer_domain.bv_len = 0;
 425                 c->c_peer_name.bv_val = NULL;
 426                 c->c_peer_name.bv_len = 0;
 427
 428                 LDAP_STAILQ_INIT(&c->c_ops);
 429                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 430
 431                 c->c_sasl_bind_mech.bv_val = NULL;
 432                 c->c_sasl_bind_mech.bv_len = 0;
 433                 c->c_sasl_context = NULL;
 434                 c->c_sasl_extra = NULL;
 435                 c->c_sasl_bindop = NULL;
 436
 437                 c->c_sb = ber_sockbuf_alloc( );
 438
 439                 {
 440                         ber_len_t max = sockbuf_max_incoming;
 441                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 442                 }
 443
 444                 c->c_currentber = NULL;
 445
 446                 /* should check status of thread calls */
 447                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 448                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 449                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 450
 451                 c->c_struct_state = SLAP_C_UNUSED;
 452         }
 453
 454     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 455
 456     assert( c->c_struct_state == SLAP_C_UNUSED );
 457     assert( c->c_authmech.bv_val == NULL );
 458     assert( c->c_dn.bv_val == NULL );
 459     assert( c->c_ndn.bv_val == NULL );
 460     assert( c->c_groups == NULL );
 461     assert( c->c_listener == NULL );
 462     assert( c->c_peer_domain.bv_val == NULL );
 463     assert( c->c_peer_name.bv_val == NULL );
 464     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 465     assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 466         assert( c->c_sasl_bind_mech.bv_val == NULL );
 467         assert( c->c_sasl_context == NULL );
 468         assert( c->c_sasl_extra == NULL );
 469         assert( c->c_sasl_bindop == NULL );
 470         assert( c->c_currentber == NULL );
 471
 472         c->c_listener = listener;
 473         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 474         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 475
 476     c->c_n_ops_received = 0;
 477     c->c_n_ops_executing = 0;
 478     c->c_n_ops_pending = 0;
 479     c->c_n_ops_completed = 0;
 480
 481         c->c_n_get = 0;
 482         c->c_n_read = 0;
 483         c->c_n_write = 0;
 484
 485         /* set to zero until bind, implies LDAP_VERSION3 */
 486         c->c_protocol = 0;
 487
 488 #ifdef SLAPD_MONITOR
 489         c->c_activitytime = c->c_starttime = slap_get_time();
 490 #else
 491         if( global_idletimeout > 0 ) {
 492                 c->c_activitytime = c->c_starttime = slap_get_time();
 493         }
 494 #endif
 495
 496 #ifdef LDAP_CONNECTIONLESS
 497         c->c_is_udp = 0;
 498         if( tls_udp_option == 2 ) {
 499                 c->c_is_udp = 1;
 500 #ifdef LDAP_DEBUG
 501                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 502                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 503 #endif
 504                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 505                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 506                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 507                         LBER_SBIOD_LEVEL_PROVIDER, NULL );
 508         } else
 509 #endif
 510         {
 511 #ifdef LDAP_DEBUG
 512                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 513                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 514 #endif
 515                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 516                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 517         }
 518
 519 #ifdef LDAP_DEBUG
 520         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 521                 INT_MAX, (void*)"ldap_" );
 522 #endif
 523
 524         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 525                 c /* non-NULL */ ) < 0 )
 526         {
 527 #ifdef NEW_LOGGING
 528                 LDAP_LOG( CONNECTION, INFO,
 529                            "connection_init: conn %lu  set nonblocking failed\n",
 530                            c->c_connid, 0, 0 );
 531 #else
 532                 Debug( LDAP_DEBUG_ANY,
 533                         "connection_init(%d, %s): set nonblocking failed\n",
 534                         s, c->c_peer_name.bv_val, 0 );
 535 #endif
 536         }
 537
 538     id = c->c_connid = conn_nextid++;
 539
 540     c->c_conn_state = SLAP_C_INACTIVE;
 541     c->c_struct_state = SLAP_C_USED;
 542
 543         c->c_ssf = c->c_transport_ssf = ssf;
 544         c->c_tls_ssf = 0;
 545
 546 #ifdef HAVE_TLS
 547     if ( tls_udp_option == 1 ) {
 548             c->c_is_tls = 1;
 549             c->c_needs_tls_accept = 1;
 550     } else {
 551             c->c_is_tls = 0;
 552             c->c_needs_tls_accept = 0;
 553     }
 554 #endif
 555
 556         slap_sasl_open( c );
 557         slap_sasl_external( c, ssf, authid );
 558
 559     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 560     ldap_pvt_thread_mutex_unlock( &connections_mutex );
 561
 562     backend_connection_init(c);
 563
 564     return id;
 565 }
 566
 567 void connection2anonymous( Connection *c )
 568 {
 569         assert( connections != NULL );
 570         assert( c != NULL );
 571
 572         {
 573                 ber_len_t max = sockbuf_max_incoming;
 574                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 575         }
 576
 577         if(c->c_authmech.bv_val != NULL ) {
 578                 free(c->c_authmech.bv_val);
 579                 c->c_authmech.bv_val = NULL;
 580         }
 581         c->c_authmech.bv_len = 0;
 582
 583         if(c->c_dn.bv_val != NULL) {
 584                 free(c->c_dn.bv_val);
 585                 c->c_dn.bv_val = NULL;
 586         }
 587         c->c_dn.bv_len = 0;
 588         if(c->c_ndn.bv_val != NULL) {
 589                 free(c->c_ndn.bv_val);
 590                 c->c_ndn.bv_val = NULL;
 591         }
 592         c->c_ndn.bv_len = 0;
 593
 594         c->c_authz_backend = NULL;
 595
 596         {
 597                 GroupAssertion *g, *n;
 598                 for (g = c->c_groups; g; g=n) {
 599                         n = g->ga_next;
 600                         free(g);
 601                 }
 602                 c->c_groups = NULL;
 603         }
 604 }
 605
 606 static void
 607 connection_destroy( Connection *c )
 608 {
 609         /* note: connections_mutex should be locked by caller */
 610     ber_socket_t        sd;
 611     unsigned long       connid;
 612
 613     assert( connections != NULL );
 614     assert( c != NULL );
 615     assert( c->c_struct_state != SLAP_C_UNUSED );
 616     assert( c->c_conn_state != SLAP_C_INVALID );
 617     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 618
 619     /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 620     connid = c->c_connid;
 621
 622     backend_connection_destroy(c);
 623
 624     c->c_protocol = 0;
 625     c->c_connid = -1;
 626
 627     c->c_activitytime = c->c_starttime = 0;
 628
 629         connection2anonymous( c );
 630         c->c_listener = NULL;
 631
 632         if(c->c_peer_domain.bv_val != NULL) {
 633                 free(c->c_peer_domain.bv_val);
 634                 c->c_peer_domain.bv_val = NULL;
 635         }
 636         c->c_peer_domain.bv_len = 0;
 637         if(c->c_peer_name.bv_val != NULL) {
 638                 free(c->c_peer_name.bv_val);
 639                 c->c_peer_name.bv_val = NULL;
 640         }
 641         c->c_peer_name.bv_len = 0;
 642
 643         c->c_sasl_bind_in_progress = 0;
 644         if(c->c_sasl_bind_mech.bv_val != NULL) {
 645                 free(c->c_sasl_bind_mech.bv_val);
 646                 c->c_sasl_bind_mech.bv_val = NULL;
 647         }
 648         c->c_sasl_bind_mech.bv_len = 0;
 649
 650         slap_sasl_close( c );
 651
 652         if ( c->c_currentber != NULL ) {
 653                 ber_free( c->c_currentber, 1 );
 654                 c->c_currentber = NULL;
 655         }
 656
 657         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 658         if ( sd != AC_SOCKET_INVALID ) {
 659                 slapd_remove( sd, 0 );
 660
 661                 Statslog( LDAP_DEBUG_STATS,
 662                     "conn=%lu fd=%d closed\n",
 663                         connid, sd, 0, 0, 0 );
 664         }
 665
 666         ber_sockbuf_free( c->c_sb );
 667
 668         c->c_sb = ber_sockbuf_alloc( );
 669
 670         {
 671                 ber_len_t max = sockbuf_max_incoming;
 672                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 673         }
 674
 675     c->c_conn_state = SLAP_C_INVALID;
 676     c->c_struct_state = SLAP_C_UNUSED;
 677 }
 678
 679 int connection_state_closing( Connection *c )
 680 {
 681         /* c_mutex must be locked by caller */
 682
 683         int state;
 684         assert( c != NULL );
 685         assert( c->c_struct_state == SLAP_C_USED );
 686
 687         state = c->c_conn_state;
 688
 689         assert( state != SLAP_C_INVALID );
 690
 691         return state == SLAP_C_CLOSING;
 692 }
 693
 694 static void connection_abandon( Connection *c )
 695 {
 696         /* c_mutex must be locked by caller */
 697
 698         Operation *o;
 699
 700         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
 701                 o->o_abandon = 1;
 702         }
 703
 704         /* remove pending operations */
 705         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 706                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 707                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 708                 slap_op_free( o );
 709         }
 710 }
 711
 712 void connection_closing( Connection *c )
 713 {
 714         assert( connections != NULL );
 715         assert( c != NULL );
 716         assert( c->c_struct_state == SLAP_C_USED );
 717         assert( c->c_conn_state != SLAP_C_INVALID );
 718
 719         /* c_mutex must be locked by caller */
 720
 721         if( c->c_conn_state != SLAP_C_CLOSING ) {
 722                 ber_socket_t    sd;
 723
 724                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 725 #ifdef NEW_LOGGING
 726                 LDAP_LOG( CONNECTION, DETAIL1,
 727                            "connection_closing: conn %lu readying socket %d for close.\n",
 728                            c->c_connid, sd, 0 );
 729 #else
 730                 Debug( LDAP_DEBUG_TRACE,
 731                         "connection_closing: readying conn=%lu sd=%d for close\n",
 732                         c->c_connid, sd, 0 );
 733 #endif
 734                 /* update state to closing */
 735                 c->c_conn_state = SLAP_C_CLOSING;
 736
 737                 /* don't listen on this port anymore */
 738                 slapd_clr_read( sd, 1 );
 739
 740                 /* abandon active operations */
 741                 connection_abandon( c );
 742
 743                 /* wake write blocked operations */
 744                 slapd_clr_write( sd, 1 );
 745                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 746         }
 747 }
 748
 749 static void connection_close( Connection *c )
 750 {
 751         ber_socket_t    sd;
 752
 753         assert( connections != NULL );
 754         assert( c != NULL );
 755         assert( c->c_struct_state == SLAP_C_USED );
 756         assert( c->c_conn_state == SLAP_C_CLOSING );
 757
 758         /* note: connections_mutex and c_mutex should be locked by caller */
 759
 760         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 761         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 762 #ifdef NEW_LOGGING
 763                 LDAP_LOG( CONNECTION, DETAIL1,
 764                            "connection_close: conn %lu  deferring sd %d\n",
 765                            c->c_connid, sd, 0 );
 766 #else
 767                 Debug( LDAP_DEBUG_TRACE,
 768                         "connection_close: deferring conn=%lu sd=%d\n",
 769                         c->c_connid, sd, 0 );
 770 #endif
 771                 return;
 772         }
 773
 774 #ifdef NEW_LOGGING
 775         LDAP_LOG( CONNECTION, RESULTS,
 776                    "connection_close: conn %lu  sd %d\n", c->c_connid, sd, 0 );
 777 #else
 778         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 779                 c->c_connid, sd, 0 );
 780 #endif
 781         connection_destroy( c );
 782 }
 783
 784 unsigned long connections_nextid(void)
 785 {
 786         unsigned long id;
 787         assert( connections != NULL );
 788
 789         ldap_pvt_thread_mutex_lock( &connections_mutex );
 790
 791         id = conn_nextid;
 792
 793         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 794
 795         return id;
 796 }
 797
 798 Connection* connection_first( ber_socket_t *index )
 799 {
 800         assert( connections != NULL );
 801         assert( index != NULL );
 802
 803         ldap_pvt_thread_mutex_lock( &connections_mutex );
 804
 805         *index = 0;
 806
 807         return connection_next(NULL, index);
 808 }
 809
 810 Connection* connection_next( Connection *c, ber_socket_t *index )
 811 {
 812         assert( connections != NULL );
 813         assert( index != NULL );
 814         assert( *index <= dtblsize );
 815
 816         if( c != NULL ) {
 817                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 818         }
 819
 820         c = NULL;
 821
 822         for(; *index < dtblsize; (*index)++) {
 823                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 824                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 825 #ifndef HAVE_WINSOCK
 826                         continue;
 827 #else
 828                         break;
 829 #endif
 830                 }
 831
 832                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 833                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 834                         c = &connections[(*index)++];
 835                         break;
 836                 }
 837
 838                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 839                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 840         }
 841
 842         if( c != NULL ) {
 843                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 844         }
 845
 846         return c;
 847 }
 848
 849 void connection_done( Connection *c )
 850 {
 851         assert( connections != NULL );
 852
 853         if( c != NULL ) {
 854                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 855         }
 856
 857         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 858 }
 859
 860 /*
 861  * connection_activity - handle the request operation op on connection
 862  * conn.  This routine figures out what kind of operation it is and
 863  * calls the appropriate stub to handle it.
 864  */
 865
 866 #ifdef SLAPD_MONITOR
 867 #define INCR_OP(var,index) \
 868         do { \
 869                 ldap_pvt_thread_mutex_lock( &num_ops_mutex ); \
 870                 (var)[(index)]++; \
 871                 ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); \
 872         } while (0)
 873 #else /* !SLAPD_MONITOR */
 874 #define INCR_OP(var,index)
 875 #endif /* !SLAPD_MONITOR */
 876
 877 static void *
 878 connection_operation( void *ctx, void *arg_v )
 879 {
 880         int rc;
 881         struct co_arg   *arg = arg_v;
 882         ber_tag_t tag = arg->co_op->o_tag;
 883 #ifdef SLAPD_MONITOR
 884         ber_tag_t oldtag = tag;
 885 #endif /* SLAPD_MONITOR */
 886         Connection *conn = arg->co_conn;
 887
 888         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 889         num_ops_initiated++;
 890         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 891
 892         arg->co_op->o_threadctx = ctx;
 893
 894         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 895 #ifdef NEW_LOGGING
 896                 LDAP_LOG( CONNECTION, ERR,
 897                         "connection_operation: conn %lu SASL bind in progress (tag=%ld).\n",
 898                         conn->c_connid, (long)tag, 0 );
 899 #else
 900                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 901                         "error: SASL bind in progress (tag=%ld).\n",
 902                         (long) tag, 0, 0 );
 903 #endif
 904                 send_ldap_result( conn, arg->co_op,
 905                         rc = LDAP_OPERATIONS_ERROR,
 906                         NULL, "SASL bind in progress", NULL, NULL );
 907                 goto operations_error;
 908         }
 909
 910         switch ( tag ) {
 911         case LDAP_REQ_BIND:
 912                 INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
 913                 rc = do_bind( conn, arg->co_op );
 914                 break;
 915
 916         case LDAP_REQ_UNBIND:
 917                 INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
 918                 rc = do_unbind( conn, arg->co_op );
 919                 break;
 920
 921         case LDAP_REQ_ADD:
 922                 INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
 923                 rc = do_add( conn, arg->co_op );
 924                 break;
 925
 926         case LDAP_REQ_DELETE:
 927                 INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
 928                 rc = do_delete( conn, arg->co_op );
 929                 break;
 930
 931         case LDAP_REQ_MODRDN:
 932                 INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
 933                 rc = do_modrdn( conn, arg->co_op );
 934                 break;
 935
 936         case LDAP_REQ_MODIFY:
 937                 INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
 938                 rc = do_modify( conn, arg->co_op );
 939                 break;
 940
 941         case LDAP_REQ_COMPARE:
 942                 INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
 943                 rc = do_compare( conn, arg->co_op );
 944                 break;
 945
 946         case LDAP_REQ_SEARCH:
 947                 INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
 948                 rc = do_search( conn, arg->co_op );
 949                 break;
 950
 951         case LDAP_REQ_ABANDON:
 952                 INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
 953                 rc = do_abandon( conn, arg->co_op );
 954                 break;
 955
 956         case LDAP_REQ_EXTENDED:
 957                 INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
 958                 rc = do_extended( conn, arg->co_op );
 959                 break;
 960
 961         default:
 962 #ifdef NEW_LOGGING
 963                 LDAP_LOG( CONNECTION, INFO,
 964                            "connection_operation: conn %lu  unknown LDAP request 0x%lx\n",
 965                            conn->c_connid, tag, 0  );
 966 #else
 967                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
 968                     tag, 0, 0 );
 969 #endif
 970                 arg->co_op->o_tag = LBER_ERROR;
 971                 send_ldap_disconnect( conn, arg->co_op,
 972                         LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
 973                 rc = -1;
 974                 break;
 975         }
 976
 977 #ifdef SLAPD_MONITOR
 978         oldtag = tag;
 979 #endif /* SLAPD_MONITOR */
 980         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
 981
 982 operations_error:
 983         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 984         num_ops_completed++;
 985 #ifdef SLAPD_MONITOR
 986         switch (oldtag) {
 987         case LDAP_REQ_BIND:
 988                 num_ops_completed_[SLAP_OP_BIND]++;
 989                 break;
 990         case LDAP_REQ_UNBIND:
 991                 num_ops_completed_[SLAP_OP_UNBIND]++;
 992                 break;
 993         case LDAP_REQ_ADD:
 994                 num_ops_completed_[SLAP_OP_ADD]++;
 995                 break;
 996         case LDAP_REQ_DELETE:
 997                 num_ops_completed_[SLAP_OP_DELETE]++;
 998                 break;
 999         case LDAP_REQ_MODRDN:
1000                 num_ops_completed_[SLAP_OP_MODRDN]++;
1001                 break;
1002         case LDAP_REQ_MODIFY:
1003                 num_ops_completed_[SLAP_OP_MODIFY]++;
1004                 break;
1005         case LDAP_REQ_COMPARE:
1006                 num_ops_completed_[SLAP_OP_COMPARE]++;
1007                 break;
1008         case LDAP_REQ_SEARCH:
1009                 num_ops_completed_[SLAP_OP_SEARCH]++;
1010                 break;
1011         case LDAP_REQ_ABANDON:
1012                 num_ops_completed_[SLAP_OP_ABANDON]++;
1013                 break;
1014         case LDAP_REQ_EXTENDED:
1015                 num_ops_completed_[SLAP_OP_EXTENDED]++;
1016                 break;
1017         }
1018 #endif /* SLAPD_MONITOR */
1019         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1020
1021         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1022
1023         conn->c_n_ops_executing--;
1024         conn->c_n_ops_completed++;
1025
1026         LDAP_STAILQ_REMOVE( &conn->c_ops, arg->co_op, slap_op, o_next);
1027         LDAP_STAILQ_NEXT(arg->co_op, o_next) = NULL;
1028 #ifdef LDAP_CLIENT_UPDATE
1029         if ( !( arg->co_op->o_clientupdate_type & SLAP_LCUP_PERSIST ) )
1030 #endif /* LDAP_CLIENT_UPDATE */
1031         {
1032                 slap_op_free( arg->co_op );
1033         }
1034         arg->co_op = NULL;
1035         arg->co_conn = NULL;
1036         free( (char *) arg );
1037         arg = NULL;
1038
1039         switch( tag ) {
1040         case LBER_ERROR:
1041         case LDAP_REQ_UNBIND:
1042                 /* c_mutex is locked */
1043                 connection_closing( conn );
1044                 break;
1045
1046         case LDAP_REQ_BIND:
1047                 conn->c_sasl_bind_in_progress =
1048                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1049
1050                 if( conn->c_conn_state == SLAP_C_BINDING) {
1051                         conn->c_conn_state = SLAP_C_ACTIVE;
1052                 }
1053         }
1054
1055         connection_resched( conn );
1056
1057         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1058
1059         return NULL;
1060 }
1061
1062 int connection_read(ber_socket_t s)
1063 {
1064         int rc = 0;
1065         Connection *c;
1066
1067         assert( connections != NULL );
1068
1069         ldap_pvt_thread_mutex_lock( &connections_mutex );
1070
1071         /* get (locked) connection */
1072         c = connection_get( s );
1073
1074         if( c == NULL ) {
1075 #ifdef NEW_LOGGING
1076                 LDAP_LOG( CONNECTION, INFO,
1077                         "connection_read: sock %ld no connection\n", (long)s, 0, 0 );
1078 #else
1079                 Debug( LDAP_DEBUG_ANY,
1080                         "connection_read(%ld): no connection!\n",
1081                         (long) s, 0, 0 );
1082 #endif
1083                 slapd_remove(s, 0);
1084
1085                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1086                 return -1;
1087         }
1088
1089         c->c_n_read++;
1090
1091         if( c->c_conn_state == SLAP_C_CLOSING ) {
1092 #ifdef NEW_LOGGING
1093                 LDAP_LOG( CONNECTION, INFO,
1094                         "connection_read: conn %lu connection closing, ignoring input\n",
1095                         c->c_connid, 0, 0 );
1096 #else
1097                 Debug( LDAP_DEBUG_TRACE,
1098                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1099                         s, c->c_connid, 0 );
1100 #endif
1101                 connection_return( c );
1102                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1103                 return 0;
1104         }
1105
1106 #ifdef NEW_LOGGING
1107         LDAP_LOG( CONNECTION, DETAIL1,
1108                    "connection_read: conn %lu  checking for input.\n",
1109                    c->c_connid, 0, 0  );
1110 #else
1111         Debug( LDAP_DEBUG_TRACE,
1112                 "connection_read(%d): checking for input on id=%lu\n",
1113                 s, c->c_connid, 0 );
1114 #endif
1115
1116 #ifdef HAVE_TLS
1117         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1118                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1119                 if ( rc < 0 ) {
1120 #if 0 /* required by next #if 0 */
1121                         struct timeval tv;
1122                         fd_set rfd;
1123 #endif
1124
1125 #ifdef NEW_LOGGING
1126                         LDAP_LOG( CONNECTION, ERR,
1127                                    "connection_read: conn %lu  TLS accept error, error %d\n",
1128                                    c->c_connid, rc, 0 );
1129 #else
1130                         Debug( LDAP_DEBUG_TRACE,
1131                                 "connection_read(%d): TLS accept error "
1132                                 "error=%d id=%lu, closing\n",
1133                                 s, rc, c->c_connid );
1134 #endif
1135                         c->c_needs_tls_accept = 0;
1136                         /* connections_mutex and c_mutex are locked */
1137                         connection_closing( c );
1138
1139 #if 0
1140                         /* Drain input before close, to allow SSL error codes
1141                          * to propagate to client. */
1142                         FD_ZERO(&rfd);
1143                         FD_SET(s, &rfd);
1144                         for (rc=1; rc>0;) {
1145                             tv.tv_sec = 1;
1146                             tv.tv_usec = 0;
1147                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1148                             if (rc == 1) {
1149                                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL);
1150                                 }
1151                         }
1152 #endif
1153                         connection_close( c );
1154
1155                 } else if ( rc == 0 ) {
1156                         void *ssl;
1157                         struct berval authid = { 0, NULL };
1158
1159                         c->c_needs_tls_accept = 0;
1160
1161                         /* we need to let SASL know */
1162                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1163
1164                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1165                         if( c->c_tls_ssf > c->c_ssf ) {
1166                                 c->c_ssf = c->c_tls_ssf;
1167                         }
1168
1169                         rc = dnX509peerNormalize( ssl, &authid );
1170                         if ( rc != LDAP_SUCCESS ) {
1171 #ifdef NEW_LOGGING
1172                                 LDAP_LOG( CONNECTION, INFO,
1173                                         "connection_read: conn %lu unable to get TLS client DN, "
1174                                         "error %d\n", c->c_connid, rc, 0 );
1175 #else
1176                                 Debug( LDAP_DEBUG_TRACE,
1177                                 "connection_read(%d): unable to get TLS client DN "
1178                                 "error=%d id=%lu\n",
1179                                 s, rc, c->c_connid );
1180 #endif
1181                         }
1182                         slap_sasl_external( c, c->c_tls_ssf, authid.bv_val );
1183                         if ( authid.bv_val )    free( authid.bv_val );
1184                 }
1185
1186                 /* if success and data is ready, fall thru to data input loop */
1187                 if( rc != 0 ||
1188                         !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1189                 {
1190                         connection_return( c );
1191                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1192                         return 0;
1193                 }
1194         }
1195 #endif
1196
1197 #ifdef HAVE_CYRUS_SASL
1198         if ( c->c_sasl_layers ) {
1199                 c->c_sasl_layers = 0;
1200
1201                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
1202
1203                 if( rc != LDAP_SUCCESS ) {
1204 #ifdef NEW_LOGGING
1205                         LDAP_LOG( CONNECTION, ERR,
1206                                 "connection_read: conn %lu SASL install error %d, closing\n",
1207                                 c->c_connid, rc, 0 );
1208 #else
1209                         Debug( LDAP_DEBUG_TRACE,
1210                                 "connection_read(%d): SASL install error "
1211                                 "error=%d id=%lu, closing\n",
1212                                 s, rc, c->c_connid );
1213 #endif
1214                         /* connections_mutex and c_mutex are locked */
1215                         connection_closing( c );
1216                         connection_close( c );
1217                         connection_return( c );
1218                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1219                         return 0;
1220                 }
1221         }
1222 #endif
1223
1224 /* #define CONNECTION_INPUT_LOOP 1 */
1225 #define DATA_READY_LOOP 1
1226
1227         do
1228         {
1229                 /* How do we do this without getting into a busy loop ? */
1230                 rc = connection_input( c );
1231         }
1232 #ifdef DATA_READY_LOOP
1233         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) );
1234 #elif CONNECTION_INPUT_LOOP
1235         while(!rc);
1236 #else
1237         while(0);
1238 #endif
1239
1240         if( rc < 0 ) {
1241 #ifdef NEW_LOGGING
1242                 LDAP_LOG( CONNECTION, ERR,
1243                         "connection_read: conn %lu  input error %d, closing.\n",
1244                         c->c_connid, rc, 0 );
1245 #else
1246                 Debug( LDAP_DEBUG_TRACE,
1247                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1248                         s, rc, c->c_connid );
1249 #endif
1250                 /* connections_mutex and c_mutex are locked */
1251                 connection_closing( c );
1252                 connection_close( c );
1253                 connection_return( c );
1254                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1255                 return 0;
1256         }
1257
1258         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1259                 slapd_set_read( s, 1 );
1260         }
1261
1262         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1263                 slapd_set_write( s, 1 );
1264         }
1265
1266         connection_return( c );
1267         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1268         return 0;
1269 }
1270
1271 static int
1272 connection_input(
1273     Connection *conn
1274 )
1275 {
1276         Operation *op;
1277         ber_tag_t       tag;
1278         ber_len_t       len;
1279         ber_int_t       msgid;
1280         BerElement      *ber;
1281 #ifdef LDAP_CONNECTIONLESS
1282         Sockaddr        peeraddr;
1283         char            *cdn = NULL;
1284 #endif
1285
1286         if ( conn->c_currentber == NULL &&
1287                 ( conn->c_currentber = ber_alloc()) == NULL )
1288         {
1289 #ifdef NEW_LOGGING
1290                 LDAP_LOG( CONNECTION, ERR,
1291                         "connection_input: conn %lu  ber_alloc failed.\n",
1292                         conn->c_connid, 0, 0 );
1293 #else
1294                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1295 #endif
1296                 return -1;
1297         }
1298
1299         errno = 0;
1300
1301 #ifdef LDAP_CONNECTIONLESS
1302         if ( conn->c_is_udp ) {
1303                 char    peername[sizeof("IP=255.255.255.255:65336")];
1304                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1305                         sizeof(struct sockaddr));
1306                 if (len != sizeof(struct sockaddr))
1307                         return 1;
1308                 sprintf( peername, "IP=%s:%d",
1309                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1310                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1311                 Statslog( LDAP_DEBUG_STATS,
1312                         "conn=%lu UDP request from %s (%s) accepted.\n",
1313                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1314         }
1315 #endif
1316         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1317         if ( tag != LDAP_TAG_MESSAGE ) {
1318                 int err = errno;
1319                 ber_socket_t    sd;
1320
1321                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1322
1323 #ifdef NEW_LOGGING
1324                 LDAP_LOG( CONNECTION, ERR,
1325                         "connection_input: conn %lu  ber_get_next failed, errno %d (%s).\n",
1326                         conn->c_connid, err, sock_errstr(err) );
1327 #else
1328                 Debug( LDAP_DEBUG_TRACE,
1329                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1330                         sd, err, sock_errstr(err) );
1331 #endif
1332                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1333                         /* log, close and send error */
1334                         ber_free( conn->c_currentber, 1 );
1335                         conn->c_currentber = NULL;
1336
1337                         return -2;
1338                 }
1339                 return 1;
1340         }
1341
1342         ber = conn->c_currentber;
1343         conn->c_currentber = NULL;
1344
1345         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1346                 /* log, close and send error */
1347 #ifdef NEW_LOGGING
1348                 LDAP_LOG( CONNECTION, ERR,
1349                         "connection_input: conn %lu  ber_get_int returns 0x%lx.\n",
1350                         conn->c_connid, tag, 0 );
1351 #else
1352                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1353                     0 );
1354 #endif
1355                 ber_free( ber, 1 );
1356                 return -1;
1357         }
1358
1359         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1360                 /* log, close and send error */
1361 #ifdef NEW_LOGGING
1362                 LDAP_LOG( CONNECTION, ERR,
1363                            "connection_input: conn %lu  ber_peek_tag returns 0x%lx.\n",
1364                            conn->c_connid, tag, 0 );
1365 #else
1366                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1367                     0 );
1368 #endif
1369                 ber_free( ber, 1 );
1370
1371                 return -1;
1372         }
1373
1374 #ifdef LDAP_CONNECTIONLESS
1375         if( conn->c_is_udp ) {
1376                 if( tag == LBER_OCTETSTRING ) {
1377                         ber_get_stringa( ber, &cdn );
1378                         tag = ber_peek_tag(ber, &len);
1379                 }
1380                 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1381 #ifdef NEW_LOGGING
1382                     LDAP_LOG( CONNECTION, ERR,
1383                                "connection_input: conn %lu  invalid req for UDP 0x%lx.\n",
1384                                conn->c_connid, tag, 0 );
1385 #else
1386                     Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1387                         0 );
1388 #endif
1389                     ber_free( ber, 1 );
1390                     return 0;
1391                 }
1392         }
1393 #endif
1394         if(tag == LDAP_REQ_BIND) {
1395                 /* immediately abandon all exiting operations upon BIND */
1396                 connection_abandon( conn );
1397         }
1398
1399         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1400
1401         op->o_conn = conn;
1402         op->vrFilter = NULL;
1403         op->o_pagedresults_state = conn->c_pagedresults_state;
1404 #ifdef LDAP_CONNECTIONLESS
1405         op->o_peeraddr = peeraddr;
1406         if (cdn ) {
1407             ber_str2bv( cdn, 0, 1, &op->o_dn );
1408             op->o_protocol = LDAP_VERSION2;
1409         }
1410 #endif
1411
1412         if ( conn->c_conn_state == SLAP_C_BINDING
1413                 || conn->c_conn_state == SLAP_C_CLOSING )
1414         {
1415 #ifdef NEW_LOGGING
1416                 LDAP_LOG( CONNECTION, INFO,
1417                         "connection_input: conn %lu  deferring operation\n",
1418                         conn->c_connid, 0, 0 );
1419 #else
1420                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1421 #endif
1422                 conn->c_n_ops_pending++;
1423                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1424
1425         } else {
1426                 conn->c_n_ops_executing++;
1427                 connection_op_activate( conn, op );
1428         }
1429
1430 #ifdef NO_THREADS
1431         if ( conn->c_struct_state != SLAP_C_USED ) {
1432                 /* connection must have got closed underneath us */
1433                 return 1;
1434         }
1435 #endif
1436         assert( conn->c_struct_state == SLAP_C_USED );
1437
1438         return 0;
1439 }
1440
1441 static int
1442 connection_resched( Connection *conn )
1443 {
1444         Operation *op;
1445
1446         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1447                 int rc;
1448                 ber_socket_t    sd;
1449                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1450
1451                 /* us trylock to avoid possible deadlock */
1452                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1453
1454                 if( rc ) {
1455 #ifdef NEW_LOGGING
1456                         LDAP_LOG( CONNECTION, DETAIL1,
1457                                 "connection_resched: conn %lu  reaquiring locks.\n",
1458                                 conn->c_connid, 0, 0 );
1459 #else
1460                         Debug( LDAP_DEBUG_TRACE,
1461                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1462                                 conn->c_connid, sd, 0 );
1463 #endif
1464                         /*
1465                          * reaquire locks in the right order...
1466                          * this may allow another thread to close this connection,
1467                          * so recheck state below.
1468                          */
1469                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1470                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1471                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1472                 }
1473
1474                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1475 #ifdef NEW_LOGGING
1476                         LDAP_LOG( CONNECTION, INFO,
1477                                 "connection_resched: conn %lu  closed by other thread.\n",
1478                                 conn->c_connid, 0, 0 );
1479 #else
1480                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1481                                 "closed by other thread conn=%lu sd=%d\n",
1482                                 conn->c_connid, sd, 0 );
1483 #endif
1484                 } else {
1485 #ifdef NEW_LOGGING
1486                         LDAP_LOG( CONNECTION, DETAIL1,
1487                                 "connection_resched: conn %lu  attempting closing.\n",
1488                                 conn->c_connid, 0, 0 );
1489 #else
1490                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1491                                 "attempting closing conn=%lu sd=%d\n",
1492                                 conn->c_connid, sd, 0 );
1493 #endif
1494                         connection_close( conn );
1495                 }
1496
1497                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1498                 return 0;
1499         }
1500
1501         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1502                 /* other states need different handling */
1503                 return 0;
1504         }
1505
1506         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1507                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1508                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1509                 /* pending operations should not be marked for abandonment */
1510                 assert(!op->o_abandon);
1511
1512                 conn->c_n_ops_pending--;
1513                 conn->c_n_ops_executing++;
1514
1515                 connection_op_activate( conn, op );
1516
1517                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1518                         break;
1519                 }
1520         }
1521         return 0;
1522 }
1523
1524 static int connection_op_activate( Connection *conn, Operation *op )
1525 {
1526         struct co_arg *arg;
1527         int status;
1528         ber_tag_t tag = op->o_tag;
1529
1530         if(tag == LDAP_REQ_BIND) {
1531                 conn->c_conn_state = SLAP_C_BINDING;
1532         }
1533
1534         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1535         arg->co_conn = conn;
1536         arg->co_op = op;
1537
1538         if (!arg->co_op->o_dn.bv_len) {
1539             arg->co_op->o_authz = conn->c_authz;
1540             arg->co_op->o_dn.bv_val = ch_strdup( conn->c_dn.bv_val ?
1541                 conn->c_dn.bv_val : "" );
1542             arg->co_op->o_ndn.bv_val = ch_strdup( conn->c_ndn.bv_val ?
1543                 conn->c_ndn.bv_val : "" );
1544         }
1545         arg->co_op->o_authtype = conn->c_authtype;
1546         ber_dupbv( &arg->co_op->o_authmech, &conn->c_authmech );
1547
1548         if (!arg->co_op->o_protocol) {
1549             arg->co_op->o_protocol = conn->c_protocol
1550                 ? conn->c_protocol : LDAP_VERSION3;
1551         }
1552         arg->co_op->o_connid = conn->c_connid;
1553
1554         LDAP_STAILQ_INSERT_TAIL( &conn->c_ops, arg->co_op, o_next );
1555
1556         status = ldap_pvt_thread_pool_submit( &connection_pool,
1557                 connection_operation, (void *) arg );
1558
1559         if ( status != 0 ) {
1560 #ifdef NEW_LOGGING
1561                 LDAP_LOG( CONNECTION, ERR,
1562                         "connection_op_activate: conn %lu        thread pool submit failed.\n",
1563                         conn->c_connid, 0, 0 );
1564 #else
1565                 Debug( LDAP_DEBUG_ANY,
1566                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1567 #endif
1568                 /* should move op to pending list */
1569         }
1570
1571         return status;
1572 }
1573
1574 int connection_write(ber_socket_t s)
1575 {
1576         Connection *c;
1577
1578         assert( connections != NULL );
1579
1580         ldap_pvt_thread_mutex_lock( &connections_mutex );
1581
1582         c = connection_get( s );
1583
1584         slapd_clr_write( s, 0);
1585
1586         if( c == NULL ) {
1587 #ifdef NEW_LOGGING
1588                 LDAP_LOG( CONNECTION, ERR,
1589                         "connection_write: sock %ld  no connection!\n", (long)s, 0, 0);
1590 #else
1591                 Debug( LDAP_DEBUG_ANY,
1592                         "connection_write(%ld): no connection!\n",
1593                         (long) s, 0, 0 );
1594 #endif
1595                 slapd_remove(s, 0);
1596                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1597                 return -1;
1598         }
1599
1600         c->c_n_write++;
1601
1602 #ifdef NEW_LOGGING
1603         LDAP_LOG( CONNECTION, DETAIL1,
1604                 "connection_write conn %lu  waking output.\n", c->c_connid, 0, 0 );
1605 #else
1606         Debug( LDAP_DEBUG_TRACE,
1607                 "connection_write(%d): waking output for id=%lu\n",
1608                 s, c->c_connid, 0 );
1609 #endif
1610         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1611
1612         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1613                 slapd_set_read( s, 1 );
1614         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1615                 slapd_set_write( s, 1 );
1616         connection_return( c );
1617         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1618         return 0;
1619 }
1620