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         const char* url,
 324         const char* dnsname,
 325         const char* peername,
 326         const char* sockname,
 327         int tls_udp_option,
 328         slap_ssf_t ssf,
 329         const char *authid )
 330 {
 331         unsigned long id;
 332         Connection *c;
 333
 334         assert( connections != NULL );
 335
 336         assert( dnsname != NULL );
 337         assert( peername != NULL );
 338         assert( sockname != NULL );
 339
 340 #ifndef HAVE_TLS
 341         assert( tls_udp_option != 1 );
 342 #endif
 343
 344         if( s == AC_SOCKET_INVALID ) {
 345 #ifdef NEW_LOGGING
 346                 LDAP_LOG( CONNECTION, INFO,
 347                            "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 348 #else
 349                 Debug( LDAP_DEBUG_ANY,
 350                        "connection_init(%ld): invalid.\n",
 351                        (long) s, 0, 0 );
 352 #endif
 353                 return -1;
 354         }
 355
 356         assert( s >= 0 );
 357 #ifndef HAVE_WINSOCK
 358         assert( s < dtblsize );
 359 #endif
 360
 361         ldap_pvt_thread_mutex_lock( &connections_mutex );
 362
 363 #ifndef HAVE_WINSOCK
 364         c = &connections[s];
 365
 366 #else
 367         {
 368                 ber_socket_t    i;
 369
 370                 c = NULL;
 371
 372         for( i=0; i < dtblsize; i++) {
 373                 ber_socket_t    sd;
 374
 375             if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 376                 assert( connections[i].c_sb == 0 );
 377                 c = &connections[i];
 378                 break;
 379             }
 380
 381                         sd = AC_SOCKET_INVALID;
 382                         if (connections[i].c_sb != NULL)
 383                         ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd );
 384
 385             if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 386                 assert( sd == AC_SOCKET_INVALID );
 387                 c = &connections[i];
 388                 break;
 389             }
 390
 391             assert( connections[i].c_struct_state == SLAP_C_USED );
 392             assert( connections[i].c_conn_state != SLAP_C_INVALID );
 393             assert( sd != AC_SOCKET_INVALID );
 394         }
 395
 396         if( c == NULL ) {
 397 #ifdef NEW_LOGGING
 398                 LDAP_LOG( CONNECTION, INFO,
 399                            "connection_init: skt %d      connection table full (%d/%d)\n",
 400                            s, i, dtblsize );
 401 #else
 402                 Debug( LDAP_DEBUG_ANY,
 403                                 "connection_init(%d): connection table full (%d/%d)\n",
 404                                 s, i, dtblsize);
 405 #endif
 406             ldap_pvt_thread_mutex_unlock( &connections_mutex );
 407             return -1;
 408         }
 409     }
 410 #endif
 411
 412     assert( c != NULL );
 413
 414         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 415                 c->c_authmech.bv_val = NULL;
 416                 c->c_authmech.bv_len = 0;
 417                 c->c_dn.bv_val = NULL;
 418                 c->c_dn.bv_len = 0;
 419                 c->c_ndn.bv_val = NULL;
 420                 c->c_ndn.bv_len = 0;
 421                 c->c_groups = NULL;
 422
 423                 c->c_listener_url.bv_val = NULL;
 424                 c->c_listener_url.bv_len = 0;
 425                 c->c_peer_domain.bv_val = NULL;
 426                 c->c_peer_domain.bv_len = 0;
 427                 c->c_peer_name.bv_val = NULL;
 428                 c->c_peer_name.bv_len = 0;
 429                 c->c_sock_name.bv_val = NULL;
 430                 c->c_sock_name.bv_len = 0;
 431
 432                 LDAP_STAILQ_INIT(&c->c_ops);
 433                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 434
 435                 c->c_sasl_bind_mech.bv_val = NULL;
 436                 c->c_sasl_bind_mech.bv_len = 0;
 437                 c->c_sasl_context = NULL;
 438                 c->c_sasl_extra = NULL;
 439                 c->c_sasl_bindop = NULL;
 440
 441                 c->c_sb = ber_sockbuf_alloc( );
 442
 443                 {
 444                         ber_len_t max = sockbuf_max_incoming;
 445                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 446                 }
 447
 448                 c->c_currentber = NULL;
 449
 450                 /* should check status of thread calls */
 451                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 452                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 453                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 454
 455                 c->c_struct_state = SLAP_C_UNUSED;
 456         }
 457
 458     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 459
 460     assert( c->c_struct_state == SLAP_C_UNUSED );
 461     assert( c->c_authmech.bv_val == NULL );
 462     assert( c->c_dn.bv_val == NULL );
 463     assert( c->c_ndn.bv_val == NULL );
 464     assert( c->c_groups == NULL );
 465     assert( c->c_listener_url.bv_val == NULL );
 466     assert( c->c_peer_domain.bv_val == NULL );
 467     assert( c->c_peer_name.bv_val == NULL );
 468     assert( c->c_sock_name.bv_val == NULL );
 469     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 470     assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 471         assert( c->c_sasl_bind_mech.bv_val == NULL );
 472         assert( c->c_sasl_context == NULL );
 473         assert( c->c_sasl_extra == NULL );
 474         assert( c->c_sasl_bindop == NULL );
 475         assert( c->c_currentber == NULL );
 476
 477         ber_str2bv( url, 0, 1, &c->c_listener_url );
 478         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 479         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 480         ber_str2bv( sockname, 0, 1, &c->c_sock_name );
 481
 482     c->c_n_ops_received = 0;
 483     c->c_n_ops_executing = 0;
 484     c->c_n_ops_pending = 0;
 485     c->c_n_ops_completed = 0;
 486
 487         c->c_n_get = 0;
 488         c->c_n_read = 0;
 489         c->c_n_write = 0;
 490
 491         /* set to zero until bind, implies LDAP_VERSION3 */
 492         c->c_protocol = 0;
 493
 494 #ifdef SLAPD_MONITOR
 495         c->c_activitytime = c->c_starttime = slap_get_time();
 496 #else
 497         if( global_idletimeout > 0 ) {
 498                 c->c_activitytime = c->c_starttime = slap_get_time();
 499         }
 500 #endif
 501
 502 #ifdef LDAP_CONNECTIONLESS
 503         c->c_is_udp = 0;
 504         if( tls_udp_option == 2 ) {
 505                 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
 637         if(c->c_listener_url.bv_val != NULL) {
 638                 free(c->c_listener_url.bv_val);
 639                 c->c_listener_url.bv_val = NULL;
 640         }
 641         c->c_listener_url.bv_len = 0;
 642
 643         if(c->c_peer_domain.bv_val != NULL) {
 644                 free(c->c_peer_domain.bv_val);
 645                 c->c_peer_domain.bv_val = NULL;
 646         }
 647         c->c_peer_domain.bv_len = 0;
 648         if(c->c_peer_name.bv_val != NULL) {
 649 #ifdef LDAP_PF_LOCAL
 650                 /*
 651                  * If peer was a domain socket, unlink. Mind you,
 652                  * they may be un-named. Should we leave this to
 653                  * the client?
 654                  */
 655                 if (strncmp(c->c_peer_name.bv_val, "PATH=",
 656                                         sizeof("PATH=") - 1) == 0) {
 657                         char *path = c->c_peer_name.bv_val
 658                                 + sizeof("PATH=") - 1;
 659                         if (path[0] != '\0') {
 660                                 (void)unlink(path);
 661                         }
 662                 }
 663 #endif /* LDAP_PF_LOCAL */
 664
 665                 free(c->c_peer_name.bv_val);
 666                 c->c_peer_name.bv_val = NULL;
 667         }
 668         c->c_peer_name.bv_len = 0;
 669         if(c->c_sock_name.bv_val != NULL) {
 670                 free(c->c_sock_name.bv_val);
 671                 c->c_sock_name.bv_val = NULL;
 672         }
 673         c->c_sock_name.bv_len = 0;
 674
 675         c->c_sasl_bind_in_progress = 0;
 676         if(c->c_sasl_bind_mech.bv_val != NULL) {
 677                 free(c->c_sasl_bind_mech.bv_val);
 678                 c->c_sasl_bind_mech.bv_val = NULL;
 679         }
 680         c->c_sasl_bind_mech.bv_len = 0;
 681
 682         slap_sasl_close( c );
 683
 684         if ( c->c_currentber != NULL ) {
 685                 ber_free( c->c_currentber, 1 );
 686                 c->c_currentber = NULL;
 687         }
 688
 689         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 690         if ( sd != AC_SOCKET_INVALID ) {
 691                 slapd_remove( sd, 0 );
 692
 693                 Statslog( LDAP_DEBUG_STATS,
 694                     "conn=%lu fd=%d closed\n",
 695                         connid, sd, 0, 0, 0 );
 696         }
 697
 698         ber_sockbuf_free( c->c_sb );
 699
 700         c->c_sb = ber_sockbuf_alloc( );
 701
 702         {
 703                 ber_len_t max = sockbuf_max_incoming;
 704                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 705         }
 706
 707     c->c_conn_state = SLAP_C_INVALID;
 708     c->c_struct_state = SLAP_C_UNUSED;
 709 }
 710
 711 int connection_state_closing( Connection *c )
 712 {
 713         /* c_mutex must be locked by caller */
 714
 715         int state;
 716         assert( c != NULL );
 717         assert( c->c_struct_state == SLAP_C_USED );
 718
 719         state = c->c_conn_state;
 720
 721         assert( state != SLAP_C_INVALID );
 722
 723         return state == SLAP_C_CLOSING;
 724 }
 725
 726 static void connection_abandon( Connection *c )
 727 {
 728         /* c_mutex must be locked by caller */
 729
 730         Operation *o;
 731
 732         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
 733                 o->o_abandon = 1;
 734         }
 735
 736         /* remove pending operations */
 737         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 738                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 739                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 740                 slap_op_free( o );
 741         }
 742 }
 743
 744 void connection_closing( Connection *c )
 745 {
 746         assert( connections != NULL );
 747         assert( c != NULL );
 748         assert( c->c_struct_state == SLAP_C_USED );
 749         assert( c->c_conn_state != SLAP_C_INVALID );
 750
 751         /* c_mutex must be locked by caller */
 752
 753         if( c->c_conn_state != SLAP_C_CLOSING ) {
 754                 ber_socket_t    sd;
 755
 756                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 757 #ifdef NEW_LOGGING
 758                 LDAP_LOG( CONNECTION, DETAIL1,
 759                            "connection_closing: conn %lu readying socket %d for close.\n",
 760                            c->c_connid, sd, 0 );
 761 #else
 762                 Debug( LDAP_DEBUG_TRACE,
 763                         "connection_closing: readying conn=%lu sd=%d for close\n",
 764                         c->c_connid, sd, 0 );
 765 #endif
 766                 /* update state to closing */
 767                 c->c_conn_state = SLAP_C_CLOSING;
 768
 769                 /* don't listen on this port anymore */
 770                 slapd_clr_read( sd, 1 );
 771
 772                 /* abandon active operations */
 773                 connection_abandon( c );
 774
 775                 /* wake write blocked operations */
 776                 slapd_clr_write( sd, 1 );
 777                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 778         }
 779 }
 780
 781 static void connection_close( Connection *c )
 782 {
 783         ber_socket_t    sd;
 784
 785         assert( connections != NULL );
 786         assert( c != NULL );
 787         assert( c->c_struct_state == SLAP_C_USED );
 788         assert( c->c_conn_state == SLAP_C_CLOSING );
 789
 790         /* note: connections_mutex and c_mutex should be locked by caller */
 791
 792         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 793         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 794 #ifdef NEW_LOGGING
 795                 LDAP_LOG( CONNECTION, DETAIL1,
 796                            "connection_close: conn %lu  deferring sd %d\n",
 797                            c->c_connid, sd, 0 );
 798 #else
 799                 Debug( LDAP_DEBUG_TRACE,
 800                         "connection_close: deferring conn=%lu sd=%d\n",
 801                         c->c_connid, sd, 0 );
 802 #endif
 803                 return;
 804         }
 805
 806 #ifdef NEW_LOGGING
 807         LDAP_LOG( CONNECTION, RESULTS,
 808                    "connection_close: conn %lu  sd %d\n", c->c_connid, sd, 0 );
 809 #else
 810         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 811                 c->c_connid, sd, 0 );
 812 #endif
 813         connection_destroy( c );
 814 }
 815
 816 unsigned long connections_nextid(void)
 817 {
 818         unsigned long id;
 819         assert( connections != NULL );
 820
 821         ldap_pvt_thread_mutex_lock( &connections_mutex );
 822
 823         id = conn_nextid;
 824
 825         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 826
 827         return id;
 828 }
 829
 830 Connection* connection_first( ber_socket_t *index )
 831 {
 832         assert( connections != NULL );
 833         assert( index != NULL );
 834
 835         ldap_pvt_thread_mutex_lock( &connections_mutex );
 836
 837         *index = 0;
 838
 839         return connection_next(NULL, index);
 840 }
 841
 842 Connection* connection_next( Connection *c, ber_socket_t *index )
 843 {
 844         assert( connections != NULL );
 845         assert( index != NULL );
 846         assert( *index <= dtblsize );
 847
 848         if( c != NULL ) {
 849                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 850         }
 851
 852         c = NULL;
 853
 854         for(; *index < dtblsize; (*index)++) {
 855                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 856                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 857 #ifndef HAVE_WINSOCK
 858                         continue;
 859 #else
 860                         break;
 861 #endif
 862                 }
 863
 864                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 865                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 866                         c = &connections[(*index)++];
 867                         break;
 868                 }
 869
 870                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 871                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 872         }
 873
 874         if( c != NULL ) {
 875                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 876         }
 877
 878         return c;
 879 }
 880
 881 void connection_done( Connection *c )
 882 {
 883         assert( connections != NULL );
 884
 885         if( c != NULL ) {
 886                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 887         }
 888
 889         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 890 }
 891
 892 /*
 893  * connection_activity - handle the request operation op on connection
 894  * conn.  This routine figures out what kind of operation it is and
 895  * calls the appropriate stub to handle it.
 896  */
 897
 898 #ifdef SLAPD_MONITOR
 899 #define INCR_OP(var,index) \
 900         do { \
 901                 ldap_pvt_thread_mutex_lock( &num_ops_mutex ); \
 902                 (var)[(index)]++; \
 903                 ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); \
 904         } while (0)
 905 #else /* !SLAPD_MONITOR */
 906 #define INCR_OP(var,index)
 907 #endif /* !SLAPD_MONITOR */
 908
 909 static void *
 910 connection_operation( void *ctx, void *arg_v )
 911 {
 912         int rc;
 913         struct co_arg   *arg = arg_v;
 914         ber_tag_t tag = arg->co_op->o_tag;
 915 #ifdef SLAPD_MONITOR
 916         ber_tag_t oldtag = tag;
 917 #endif /* SLAPD_MONITOR */
 918         Connection *conn = arg->co_conn;
 919
 920         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 921         num_ops_initiated++;
 922         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 923
 924         arg->co_op->o_threadctx = ctx;
 925
 926         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 927 #ifdef NEW_LOGGING
 928                 LDAP_LOG( CONNECTION, ERR,
 929                         "connection_operation: conn %lu SASL bind in progress (tag=%ld).\n",
 930                         conn->c_connid, (long)tag, 0 );
 931 #else
 932                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 933                         "error: SASL bind in progress (tag=%ld).\n",
 934                         (long) tag, 0, 0 );
 935 #endif
 936                 send_ldap_result( conn, arg->co_op,
 937                         rc = LDAP_OPERATIONS_ERROR,
 938                         NULL, "SASL bind in progress", NULL, NULL );
 939                 goto operations_error;
 940         }
 941
 942         switch ( tag ) {
 943         case LDAP_REQ_BIND:
 944                 INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
 945                 rc = do_bind( conn, arg->co_op );
 946                 break;
 947
 948         case LDAP_REQ_UNBIND:
 949                 INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
 950                 rc = do_unbind( conn, arg->co_op );
 951                 break;
 952
 953         case LDAP_REQ_ADD:
 954                 INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
 955                 rc = do_add( conn, arg->co_op );
 956                 break;
 957
 958         case LDAP_REQ_DELETE:
 959                 INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
 960                 rc = do_delete( conn, arg->co_op );
 961                 break;
 962
 963         case LDAP_REQ_MODRDN:
 964                 INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
 965                 rc = do_modrdn( conn, arg->co_op );
 966                 break;
 967
 968         case LDAP_REQ_MODIFY:
 969                 INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
 970                 rc = do_modify( conn, arg->co_op );
 971                 break;
 972
 973         case LDAP_REQ_COMPARE:
 974                 INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
 975                 rc = do_compare( conn, arg->co_op );
 976                 break;
 977
 978         case LDAP_REQ_SEARCH:
 979                 INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
 980                 rc = do_search( conn, arg->co_op );
 981                 break;
 982
 983         case LDAP_REQ_ABANDON:
 984                 INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
 985                 rc = do_abandon( conn, arg->co_op );
 986                 break;
 987
 988         case LDAP_REQ_EXTENDED:
 989                 INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
 990                 rc = do_extended( conn, arg->co_op );
 991                 break;
 992
 993         default:
 994 #ifdef NEW_LOGGING
 995                 LDAP_LOG( CONNECTION, INFO,
 996                            "connection_operation: conn %lu  unknown LDAP request 0x%lx\n",
 997                            conn->c_connid, tag, 0  );
 998 #else
 999                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
1000                     tag, 0, 0 );
1001 #endif
1002                 arg->co_op->o_tag = LBER_ERROR;
1003                 send_ldap_disconnect( conn, arg->co_op,
1004                         LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
1005                 rc = -1;
1006                 break;
1007         }
1008
1009 #ifdef SLAPD_MONITOR
1010         oldtag = tag;
1011 #endif /* SLAPD_MONITOR */
1012         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
1013
1014 operations_error:
1015         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
1016         num_ops_completed++;
1017 #ifdef SLAPD_MONITOR
1018         switch (oldtag) {
1019         case LDAP_REQ_BIND:
1020                 num_ops_completed_[SLAP_OP_BIND]++;
1021                 break;
1022         case LDAP_REQ_UNBIND:
1023                 num_ops_completed_[SLAP_OP_UNBIND]++;
1024                 break;
1025         case LDAP_REQ_ADD:
1026                 num_ops_completed_[SLAP_OP_ADD]++;
1027                 break;
1028         case LDAP_REQ_DELETE:
1029                 num_ops_completed_[SLAP_OP_DELETE]++;
1030                 break;
1031         case LDAP_REQ_MODRDN:
1032                 num_ops_completed_[SLAP_OP_MODRDN]++;
1033                 break;
1034         case LDAP_REQ_MODIFY:
1035                 num_ops_completed_[SLAP_OP_MODIFY]++;
1036                 break;
1037         case LDAP_REQ_COMPARE:
1038                 num_ops_completed_[SLAP_OP_COMPARE]++;
1039                 break;
1040         case LDAP_REQ_SEARCH:
1041                 num_ops_completed_[SLAP_OP_SEARCH]++;
1042                 break;
1043         case LDAP_REQ_ABANDON:
1044                 num_ops_completed_[SLAP_OP_ABANDON]++;
1045                 break;
1046         case LDAP_REQ_EXTENDED:
1047                 num_ops_completed_[SLAP_OP_EXTENDED]++;
1048                 break;
1049         }
1050 #endif /* SLAPD_MONITOR */
1051         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1052
1053         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1054
1055         conn->c_n_ops_executing--;
1056         conn->c_n_ops_completed++;
1057
1058         LDAP_STAILQ_REMOVE( &conn->c_ops, arg->co_op, slap_op, o_next);
1059         LDAP_STAILQ_NEXT(arg->co_op, o_next) = NULL;
1060         slap_op_free( arg->co_op );
1061         arg->co_op = NULL;
1062         arg->co_conn = NULL;
1063         free( (char *) arg );
1064         arg = NULL;
1065
1066         switch( tag ) {
1067         case LBER_ERROR:
1068         case LDAP_REQ_UNBIND:
1069                 /* c_mutex is locked */
1070                 connection_closing( conn );
1071                 break;
1072
1073         case LDAP_REQ_BIND:
1074                 conn->c_sasl_bind_in_progress =
1075                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1076
1077                 if( conn->c_conn_state == SLAP_C_BINDING) {
1078                         conn->c_conn_state = SLAP_C_ACTIVE;
1079                 }
1080         }
1081
1082         connection_resched( conn );
1083
1084         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1085
1086         return NULL;
1087 }
1088
1089 int connection_read(ber_socket_t s)
1090 {
1091         int rc = 0;
1092         Connection *c;
1093
1094         assert( connections != NULL );
1095
1096         ldap_pvt_thread_mutex_lock( &connections_mutex );
1097
1098         /* get (locked) connection */
1099         c = connection_get( s );
1100
1101         if( c == NULL ) {
1102 #ifdef NEW_LOGGING
1103                 LDAP_LOG( CONNECTION, INFO,
1104                         "connection_read: sock %ld no connection\n", (long)s, 0, 0 );
1105 #else
1106                 Debug( LDAP_DEBUG_ANY,
1107                         "connection_read(%ld): no connection!\n",
1108                         (long) s, 0, 0 );
1109 #endif
1110                 slapd_remove(s, 0);
1111
1112                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1113                 return -1;
1114         }
1115
1116         c->c_n_read++;
1117
1118         if( c->c_conn_state == SLAP_C_CLOSING ) {
1119 #ifdef NEW_LOGGING
1120                 LDAP_LOG( CONNECTION, INFO,
1121                         "connection_read: conn %lu connection closing, ignoring input\n",
1122                         c->c_connid, 0, 0 );
1123 #else
1124                 Debug( LDAP_DEBUG_TRACE,
1125                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1126                         s, c->c_connid, 0 );
1127 #endif
1128                 connection_return( c );
1129                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1130                 return 0;
1131         }
1132
1133 #ifdef NEW_LOGGING
1134         LDAP_LOG( CONNECTION, DETAIL1,
1135                    "connection_read: conn %lu  checking for input.\n",
1136                    c->c_connid, 0, 0  );
1137 #else
1138         Debug( LDAP_DEBUG_TRACE,
1139                 "connection_read(%d): checking for input on id=%lu\n",
1140                 s, c->c_connid, 0 );
1141 #endif
1142
1143 #ifdef HAVE_TLS
1144         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1145                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1146                 if ( rc < 0 ) {
1147 #if 0 /* required by next #if 0 */
1148                         struct timeval tv;
1149                         fd_set rfd;
1150 #endif
1151
1152 #ifdef NEW_LOGGING
1153                         LDAP_LOG( CONNECTION, ERR,
1154                                    "connection_read: conn %lu  TLS accept error, error %d\n",
1155                                    c->c_connid, rc, 0 );
1156 #else
1157                         Debug( LDAP_DEBUG_TRACE,
1158                                 "connection_read(%d): TLS accept error "
1159                                 "error=%d id=%lu, closing\n",
1160                                 s, rc, c->c_connid );
1161 #endif
1162                         c->c_needs_tls_accept = 0;
1163                         /* connections_mutex and c_mutex are locked */
1164                         connection_closing( c );
1165
1166 #if 0
1167                         /* Drain input before close, to allow SSL error codes
1168                          * to propagate to client. */
1169                         FD_ZERO(&rfd);
1170                         FD_SET(s, &rfd);
1171                         for (rc=1; rc>0;) {
1172                             tv.tv_sec = 1;
1173                             tv.tv_usec = 0;
1174                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1175                             if (rc == 1) {
1176                                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL);
1177                                 }
1178                         }
1179 #endif
1180                         connection_close( c );
1181
1182                 } else if ( rc == 0 ) {
1183                         void *ssl;
1184                         struct berval authid = { 0, NULL };
1185
1186                         c->c_needs_tls_accept = 0;
1187
1188                         /* we need to let SASL know */
1189                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1190
1191                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1192                         if( c->c_tls_ssf > c->c_ssf ) {
1193                                 c->c_ssf = c->c_tls_ssf;
1194                         }
1195
1196                         rc = dnX509peerNormalize( ssl, &authid );
1197                         if ( rc != LDAP_SUCCESS ) {
1198 #ifdef NEW_LOGGING
1199                                 LDAP_LOG( CONNECTION, INFO,
1200                                         "connection_read: conn %lu unable to get TLS client DN, "
1201                                         "error %d\n", c->c_connid, rc, 0 );
1202 #else
1203                                 Debug( LDAP_DEBUG_TRACE,
1204                                 "connection_read(%d): unable to get TLS client DN "
1205                                 "error=%d id=%lu\n",
1206                                 s, rc, c->c_connid );
1207 #endif
1208                         }
1209                         slap_sasl_external( c, c->c_tls_ssf, authid.bv_val );
1210                         if ( authid.bv_val )    free( authid.bv_val );
1211                 }
1212
1213                 /* if success and data is ready, fall thru to data input loop */
1214                 if( rc != 0 ||
1215                         !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1216                 {
1217                         connection_return( c );
1218                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1219                         return 0;
1220                 }
1221         }
1222 #endif
1223
1224 #ifdef HAVE_CYRUS_SASL
1225         if ( c->c_sasl_layers ) {
1226                 c->c_sasl_layers = 0;
1227
1228                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
1229
1230                 if( rc != LDAP_SUCCESS ) {
1231 #ifdef NEW_LOGGING
1232                         LDAP_LOG( CONNECTION, ERR,
1233                                 "connection_read: conn %lu SASL install error %d, closing\n",
1234                                 c->c_connid, rc, 0 );
1235 #else
1236                         Debug( LDAP_DEBUG_TRACE,
1237                                 "connection_read(%d): SASL install error "
1238                                 "error=%d id=%lu, closing\n",
1239                                 s, rc, c->c_connid );
1240 #endif
1241                         /* connections_mutex and c_mutex are locked */
1242                         connection_closing( c );
1243                         connection_close( c );
1244                         connection_return( c );
1245                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1246                         return 0;
1247                 }
1248         }
1249 #endif
1250
1251 #define CONNECTION_INPUT_LOOP 1
1252
1253 #ifdef DATA_READY_LOOP
1254         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
1255 #elif CONNECTION_INPUT_LOOP
1256         while(!rc)
1257 #endif
1258         {
1259                 /* How do we do this without getting into a busy loop ? */
1260                 rc = connection_input( c );
1261         }
1262
1263         if( rc < 0 ) {
1264 #ifdef NEW_LOGGING
1265                 LDAP_LOG( CONNECTION, ERR,
1266                         "connection_read: conn %lu  input error %d, closing.\n",
1267                         c->c_connid, rc, 0 );
1268 #else
1269                 Debug( LDAP_DEBUG_TRACE,
1270                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1271                         s, rc, c->c_connid );
1272 #endif
1273                 /* connections_mutex and c_mutex are locked */
1274                 connection_closing( c );
1275                 connection_close( c );
1276                 connection_return( c );
1277                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1278                 return 0;
1279         }
1280
1281         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1282                 slapd_set_read( s, 1 );
1283         }
1284
1285         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1286                 slapd_set_write( s, 1 );
1287         }
1288
1289         connection_return( c );
1290         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1291         return 0;
1292 }
1293
1294 static int
1295 connection_input(
1296     Connection *conn
1297 )
1298 {
1299         Operation *op;
1300         ber_tag_t       tag;
1301         ber_len_t       len;
1302         ber_int_t       msgid;
1303         BerElement      *ber;
1304 #ifdef LDAP_CONNECTIONLESS
1305         Sockaddr        peeraddr;
1306         char            *cdn = NULL;
1307 #endif
1308
1309         if ( conn->c_currentber == NULL &&
1310                 ( conn->c_currentber = ber_alloc()) == NULL )
1311         {
1312 #ifdef NEW_LOGGING
1313                 LDAP_LOG( CONNECTION, ERR,
1314                         "connection_input: conn %lu  ber_alloc failed.\n",
1315                         conn->c_connid, 0, 0 );
1316 #else
1317                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1318 #endif
1319                 return -1;
1320         }
1321
1322         errno = 0;
1323
1324 #ifdef LDAP_CONNECTIONLESS
1325         if ( conn->c_is_udp ) {
1326                 char    peername[sizeof("IP=255.255.255.255:65336")];
1327                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1328                         sizeof(struct sockaddr));
1329                 if (len != sizeof(struct sockaddr))
1330                         return 1;
1331                 sprintf( peername, "IP=%s:%d",
1332                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1333                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1334                 Statslog( LDAP_DEBUG_STATS,
1335                         "conn=%lu UDP request from %s (%s) accepted.\n",
1336                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1337         }
1338 #endif
1339         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1340         if ( tag != LDAP_TAG_MESSAGE ) {
1341                 int err = errno;
1342                 ber_socket_t    sd;
1343
1344                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1345
1346 #ifdef NEW_LOGGING
1347                 LDAP_LOG( CONNECTION, ERR,
1348                         "connection_input: conn %lu  ber_get_next failed, errno %d (%s).\n",
1349                         conn->c_connid, err, sock_errstr(err) );
1350 #else
1351                 Debug( LDAP_DEBUG_TRACE,
1352                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1353                         sd, err, sock_errstr(err) );
1354 #endif
1355                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1356                         /* log, close and send error */
1357                         ber_free( conn->c_currentber, 1 );
1358                         conn->c_currentber = NULL;
1359
1360                         return -2;
1361                 }
1362                 return 1;
1363         }
1364
1365         ber = conn->c_currentber;
1366         conn->c_currentber = NULL;
1367
1368         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1369                 /* log, close and send error */
1370 #ifdef NEW_LOGGING
1371                 LDAP_LOG( CONNECTION, ERR,
1372                         "connection_input: conn %lu  ber_get_int returns 0x%lx.\n",
1373                         conn->c_connid, tag, 0 );
1374 #else
1375                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1376                     0 );
1377 #endif
1378                 ber_free( ber, 1 );
1379                 return -1;
1380         }
1381
1382         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1383                 /* log, close and send error */
1384 #ifdef NEW_LOGGING
1385                 LDAP_LOG( CONNECTION, ERR,
1386                            "connection_input: conn %lu  ber_peek_tag returns 0x%lx.\n",
1387                            conn->c_connid, tag, 0 );
1388 #else
1389                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1390                     0 );
1391 #endif
1392                 ber_free( ber, 1 );
1393
1394                 return -1;
1395         }
1396
1397 #ifdef LDAP_CONNECTIONLESS
1398         if( conn->c_is_udp ) {
1399                 if( tag == LBER_OCTETSTRING ) {
1400                         ber_get_stringa( ber, &cdn );
1401                         tag = ber_peek_tag(ber, &len);
1402                 }
1403                 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1404 #ifdef NEW_LOGGING
1405                     LDAP_LOG( CONNECTION, ERR,
1406                                "connection_input: conn %lu  invalid req for UDP 0x%lx.\n",
1407                                conn->c_connid, tag, 0 );
1408 #else
1409                     Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1410                         0 );
1411 #endif
1412                     ber_free( ber, 1 );
1413                     return 0;
1414                 }
1415         }
1416 #endif
1417         if(tag == LDAP_REQ_BIND) {
1418                 /* immediately abandon all exiting operations upon BIND */
1419                 connection_abandon( conn );
1420         }
1421
1422         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1423
1424         op->o_conn = conn;
1425         op->vrFilter = NULL;
1426         op->o_pagedresults_state = conn->c_pagedresults_state;
1427 #ifdef LDAP_CONNECTIONLESS
1428         op->o_peeraddr = peeraddr;
1429         if (cdn ) {
1430             ber_str2bv( cdn, 0, 1, &op->o_dn );
1431             op->o_protocol = LDAP_VERSION2;
1432         }
1433 #endif
1434
1435         if ( conn->c_conn_state == SLAP_C_BINDING
1436                 || conn->c_conn_state == SLAP_C_CLOSING )
1437         {
1438 #ifdef NEW_LOGGING
1439                 LDAP_LOG( CONNECTION, INFO,
1440                         "connection_input: conn %lu  deferring operation\n",
1441                         conn->c_connid, 0, 0 );
1442 #else
1443                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1444 #endif
1445                 conn->c_n_ops_pending++;
1446                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1447
1448         } else {
1449                 conn->c_n_ops_executing++;
1450                 connection_op_activate( conn, op );
1451         }
1452
1453 #ifdef NO_THREADS
1454         if ( conn->c_struct_state != SLAP_C_USED ) {
1455                 /* connection must have got closed underneath us */
1456                 return 1;
1457         }
1458 #endif
1459         assert( conn->c_struct_state == SLAP_C_USED );
1460
1461         return 0;
1462 }
1463
1464 static int
1465 connection_resched( Connection *conn )
1466 {
1467         Operation *op;
1468
1469         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1470                 int rc;
1471                 ber_socket_t    sd;
1472                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1473
1474                 /* us trylock to avoid possible deadlock */
1475                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1476
1477                 if( rc ) {
1478 #ifdef NEW_LOGGING
1479                         LDAP_LOG( CONNECTION, DETAIL1,
1480                                 "connection_resched: conn %lu  reaquiring locks.\n",
1481                                 conn->c_connid, 0, 0 );
1482 #else
1483                         Debug( LDAP_DEBUG_TRACE,
1484                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1485                                 conn->c_connid, sd, 0 );
1486 #endif
1487                         /*
1488                          * reaquire locks in the right order...
1489                          * this may allow another thread to close this connection,
1490                          * so recheck state below.
1491                          */
1492                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1493                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1494                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1495                 }
1496
1497                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1498 #ifdef NEW_LOGGING
1499                         LDAP_LOG( CONNECTION, INFO,
1500                                 "connection_resched: conn %lu  closed by other thread.\n",
1501                                 conn->c_connid, 0, 0 );
1502 #else
1503                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1504                                 "closed by other thread conn=%lu sd=%d\n",
1505                                 conn->c_connid, sd, 0 );
1506 #endif
1507                 } else {
1508 #ifdef NEW_LOGGING
1509                         LDAP_LOG( CONNECTION, DETAIL1,
1510                                 "connection_resched: conn %lu  attempting closing.\n",
1511                                 conn->c_connid, 0, 0 );
1512 #else
1513                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1514                                 "attempting closing conn=%lu sd=%d\n",
1515                                 conn->c_connid, sd, 0 );
1516 #endif
1517                         connection_close( conn );
1518                 }
1519
1520                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1521                 return 0;
1522         }
1523
1524         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1525                 /* other states need different handling */
1526                 return 0;
1527         }
1528
1529         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1530                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1531                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1532                 /* pending operations should not be marked for abandonment */
1533                 assert(!op->o_abandon);
1534
1535                 conn->c_n_ops_pending--;
1536                 conn->c_n_ops_executing++;
1537
1538                 connection_op_activate( conn, op );
1539
1540                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1541                         break;
1542                 }
1543         }
1544         return 0;
1545 }
1546
1547 static int connection_op_activate( Connection *conn, Operation *op )
1548 {
1549         struct co_arg *arg;
1550         int status;
1551         ber_tag_t tag = op->o_tag;
1552
1553         if(tag == LDAP_REQ_BIND) {
1554                 conn->c_conn_state = SLAP_C_BINDING;
1555         }
1556
1557         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1558         arg->co_conn = conn;
1559         arg->co_op = op;
1560
1561         if (!arg->co_op->o_dn.bv_len) {
1562             arg->co_op->o_authz = conn->c_authz;
1563             arg->co_op->o_dn.bv_val = ch_strdup( conn->c_dn.bv_val ?
1564                 conn->c_dn.bv_val : "" );
1565             arg->co_op->o_ndn.bv_val = ch_strdup( conn->c_ndn.bv_val ?
1566                 conn->c_ndn.bv_val : "" );
1567         }
1568         arg->co_op->o_authtype = conn->c_authtype;
1569         ber_dupbv( &arg->co_op->o_authmech, &conn->c_authmech );
1570
1571         if (!arg->co_op->o_protocol) {
1572             arg->co_op->o_protocol = conn->c_protocol
1573                 ? conn->c_protocol : LDAP_VERSION3;
1574         }
1575         arg->co_op->o_connid = conn->c_connid;
1576
1577         LDAP_STAILQ_INSERT_TAIL( &conn->c_ops, arg->co_op, o_next );
1578
1579         status = ldap_pvt_thread_pool_submit( &connection_pool,
1580                 connection_operation, (void *) arg );
1581
1582         if ( status != 0 ) {
1583 #ifdef NEW_LOGGING
1584                 LDAP_LOG( CONNECTION, ERR,
1585                         "connection_op_activate: conn %lu        thread pool submit failed.\n",
1586                         conn->c_connid, 0, 0 );
1587 #else
1588                 Debug( LDAP_DEBUG_ANY,
1589                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1590 #endif
1591                 /* should move op to pending list */
1592         }
1593
1594         return status;
1595 }
1596
1597 int connection_write(ber_socket_t s)
1598 {
1599         Connection *c;
1600
1601         assert( connections != NULL );
1602
1603         ldap_pvt_thread_mutex_lock( &connections_mutex );
1604
1605         c = connection_get( s );
1606
1607         slapd_clr_write( s, 0);
1608
1609         if( c == NULL ) {
1610 #ifdef NEW_LOGGING
1611                 LDAP_LOG( CONNECTION, ERR,
1612                         "connection_write: sock %ld  no connection!\n", (long)s, 0, 0);
1613 #else
1614                 Debug( LDAP_DEBUG_ANY,
1615                         "connection_write(%ld): no connection!\n",
1616                         (long) s, 0, 0 );
1617 #endif
1618                 slapd_remove(s, 0);
1619                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1620                 return -1;
1621         }
1622
1623         c->c_n_write++;
1624
1625 #ifdef NEW_LOGGING
1626         LDAP_LOG( CONNECTION, DETAIL1,
1627                 "connection_write conn %lu  waking output.\n", c->c_connid, 0, 0 );
1628 #else
1629         Debug( LDAP_DEBUG_TRACE,
1630                 "connection_write(%d): waking output for id=%lu\n",
1631                 s, c->c_connid, 0 );
1632 #endif
1633         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1634
1635         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1636                 slapd_set_read( s, 1 );
1637         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1638                 slapd_set_write( s, 1 );
1639         connection_return( c );
1640         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1641         return 0;
1642 }
1643