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
 440                 c->c_sb = ber_sockbuf_alloc( );
 441
 442                 {
 443                         ber_len_t max = sockbuf_max_incoming;
 444                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 445                 }
 446
 447                 c->c_currentber = NULL;
 448
 449                 /* should check status of thread calls */
 450                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 451                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 452                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 453
 454                 c->c_struct_state = SLAP_C_UNUSED;
 455         }
 456
 457     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 458
 459     assert( c->c_struct_state == SLAP_C_UNUSED );
 460     assert( c->c_authmech.bv_val == NULL );
 461     assert( c->c_dn.bv_val == NULL );
 462     assert( c->c_ndn.bv_val == NULL );
 463     assert( c->c_groups == NULL );
 464     assert( c->c_listener_url.bv_val == NULL );
 465     assert( c->c_peer_domain.bv_val == NULL );
 466     assert( c->c_peer_name.bv_val == NULL );
 467     assert( c->c_sock_name.bv_val == NULL );
 468     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 469     assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 470         assert( c->c_sasl_bind_mech.bv_val == NULL );
 471         assert( c->c_sasl_context == NULL );
 472         assert( c->c_sasl_extra == NULL );
 473         assert( c->c_currentber == NULL );
 474
 475         ber_str2bv( url, 0, 1, &c->c_listener_url );
 476         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 477         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 478         ber_str2bv( sockname, 0, 1, &c->c_sock_name );
 479
 480     c->c_n_ops_received = 0;
 481     c->c_n_ops_executing = 0;
 482     c->c_n_ops_pending = 0;
 483     c->c_n_ops_completed = 0;
 484
 485         c->c_n_get = 0;
 486         c->c_n_read = 0;
 487         c->c_n_write = 0;
 488
 489         /* set to zero until bind, implies LDAP_VERSION3 */
 490         c->c_protocol = 0;
 491
 492 #ifdef SLAPD_MONITOR
 493         c->c_activitytime = c->c_starttime = slap_get_time();
 494 #else
 495         if( global_idletimeout > 0 ) {
 496                 c->c_activitytime = c->c_starttime = slap_get_time();
 497         }
 498 #endif
 499
 500 #ifdef LDAP_CONNECTIONLESS
 501         c->c_is_udp = 0;
 502         if (tls_udp_option == 2)
 503         {
 504                 c->c_is_udp = 1;
 505 #ifdef LDAP_DEBUG
 506         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 507                 LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 508 #endif
 509         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 510                 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 511         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 512                 LBER_SBIOD_LEVEL_PROVIDER, NULL );
 513         } else
 514 #endif
 515         {
 516 #ifdef LDAP_DEBUG
 517         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 518                 LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 519 #endif
 520         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 521                 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 522         }
 523
 524 #ifdef LDAP_DEBUG
 525         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 526                 INT_MAX, (void*)"ldap_" );
 527 #endif
 528
 529         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 530                 c /* non-NULL */ ) < 0 )
 531         {
 532 #ifdef NEW_LOGGING
 533                 LDAP_LOG( CONNECTION, INFO,
 534                            "connection_init: conn %lu  set nonblocking failed\n",
 535                            c->c_connid, 0, 0 );
 536 #else
 537                 Debug( LDAP_DEBUG_ANY,
 538                         "connection_init(%d, %s): set nonblocking failed\n",
 539                         s, c->c_peer_name.bv_val, 0 );
 540 #endif
 541         }
 542
 543     id = c->c_connid = conn_nextid++;
 544
 545     c->c_conn_state = SLAP_C_INACTIVE;
 546     c->c_struct_state = SLAP_C_USED;
 547
 548         c->c_ssf = c->c_transport_ssf = ssf;
 549         c->c_tls_ssf = 0;
 550
 551 #ifdef HAVE_TLS
 552     if ( tls_udp_option == 1 ) {
 553             c->c_is_tls = 1;
 554             c->c_needs_tls_accept = 1;
 555     } else {
 556             c->c_is_tls = 0;
 557             c->c_needs_tls_accept = 0;
 558     }
 559 #endif
 560
 561         slap_sasl_open( c );
 562         slap_sasl_external( c, ssf, authid );
 563
 564     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 565     ldap_pvt_thread_mutex_unlock( &connections_mutex );
 566
 567     backend_connection_init(c);
 568
 569     return id;
 570 }
 571
 572 void connection2anonymous( Connection *c )
 573 {
 574         assert( connections != NULL );
 575         assert( c != NULL );
 576
 577         {
 578                 ber_len_t max = sockbuf_max_incoming;
 579                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 580         }
 581
 582         if(c->c_authmech.bv_val != NULL ) {
 583                 free(c->c_authmech.bv_val);
 584                 c->c_authmech.bv_val = NULL;
 585         }
 586         c->c_authmech.bv_len = 0;
 587
 588         if(c->c_dn.bv_val != NULL) {
 589                 free(c->c_dn.bv_val);
 590                 c->c_dn.bv_val = NULL;
 591         }
 592         c->c_dn.bv_len = 0;
 593         if(c->c_ndn.bv_val != NULL) {
 594                 free(c->c_ndn.bv_val);
 595                 c->c_ndn.bv_val = NULL;
 596         }
 597         c->c_ndn.bv_len = 0;
 598
 599         c->c_authz_backend = NULL;
 600
 601         {
 602                 GroupAssertion *g, *n;
 603                 for (g = c->c_groups; g; g=n) {
 604                         n = g->ga_next;
 605                         free(g);
 606                 }
 607                 c->c_groups = NULL;
 608         }
 609 }
 610
 611 static void
 612 connection_destroy( Connection *c )
 613 {
 614         /* note: connections_mutex should be locked by caller */
 615     ber_socket_t        sd;
 616     unsigned long       connid;
 617
 618     assert( connections != NULL );
 619     assert( c != NULL );
 620     assert( c->c_struct_state != SLAP_C_UNUSED );
 621     assert( c->c_conn_state != SLAP_C_INVALID );
 622     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 623
 624     /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 625     connid = c->c_connid;
 626
 627     backend_connection_destroy(c);
 628
 629     c->c_protocol = 0;
 630     c->c_connid = -1;
 631
 632     c->c_activitytime = c->c_starttime = 0;
 633
 634         connection2anonymous( c );
 635
 636         if(c->c_listener_url.bv_val != NULL) {
 637                 free(c->c_listener_url.bv_val);
 638                 c->c_listener_url.bv_val = NULL;
 639         }
 640         c->c_listener_url.bv_len = 0;
 641
 642         if(c->c_peer_domain.bv_val != NULL) {
 643                 free(c->c_peer_domain.bv_val);
 644                 c->c_peer_domain.bv_val = NULL;
 645         }
 646         c->c_peer_domain.bv_len = 0;
 647         if(c->c_peer_name.bv_val != NULL) {
 648 #ifdef LDAP_PF_LOCAL
 649                 /*
 650                  * If peer was a domain socket, unlink. Mind you,
 651                  * they may be un-named. Should we leave this to
 652                  * the client?
 653                  */
 654                 if (strncmp(c->c_peer_name.bv_val, "PATH=",
 655                                         sizeof("PATH=") - 1) == 0) {
 656                         char *path = c->c_peer_name.bv_val
 657                                 + sizeof("PATH=") - 1;
 658                         if (path[0] != '\0') {
 659                                 (void)unlink(path);
 660                         }
 661                 }
 662 #endif /* LDAP_PF_LOCAL */
 663
 664                 free(c->c_peer_name.bv_val);
 665                 c->c_peer_name.bv_val = NULL;
 666         }
 667         c->c_peer_name.bv_len = 0;
 668         if(c->c_sock_name.bv_val != NULL) {
 669                 free(c->c_sock_name.bv_val);
 670                 c->c_sock_name.bv_val = NULL;
 671         }
 672         c->c_sock_name.bv_len = 0;
 673
 674         c->c_sasl_bind_in_progress = 0;
 675         if(c->c_sasl_bind_mech.bv_val != NULL) {
 676                 free(c->c_sasl_bind_mech.bv_val);
 677                 c->c_sasl_bind_mech.bv_val = NULL;
 678         }
 679         c->c_sasl_bind_mech.bv_len = 0;
 680
 681         slap_sasl_close( c );
 682
 683         if ( c->c_currentber != NULL ) {
 684                 ber_free( c->c_currentber, 1 );
 685                 c->c_currentber = NULL;
 686         }
 687
 688         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 689         if ( sd != AC_SOCKET_INVALID ) {
 690                 slapd_remove( sd, 0 );
 691
 692                 Statslog( LDAP_DEBUG_STATS,
 693                     "conn=%lu fd=%d closed\n",
 694                         connid, sd, 0, 0, 0 );
 695         }
 696
 697         ber_sockbuf_free( c->c_sb );
 698
 699         c->c_sb = ber_sockbuf_alloc( );
 700
 701         {
 702                 ber_len_t max = sockbuf_max_incoming;
 703                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 704         }
 705
 706     c->c_conn_state = SLAP_C_INVALID;
 707     c->c_struct_state = SLAP_C_UNUSED;
 708 }
 709
 710 int connection_state_closing( Connection *c )
 711 {
 712         /* c_mutex must be locked by caller */
 713
 714         int state;
 715         assert( c != NULL );
 716         assert( c->c_struct_state == SLAP_C_USED );
 717
 718         state = c->c_conn_state;
 719
 720         assert( state != SLAP_C_INVALID );
 721
 722         return state == SLAP_C_CLOSING;
 723 }
 724
 725 static void connection_abandon( Connection *c )
 726 {
 727         /* c_mutex must be locked by caller */
 728
 729         Operation *o;
 730
 731         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
 732                 o->o_abandon = 1;
 733         }
 734
 735         /* remove pending operations */
 736         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 737                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 738                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 739                 slap_op_free( o );
 740         }
 741 }
 742
 743 void connection_closing( Connection *c )
 744 {
 745         assert( connections != NULL );
 746         assert( c != NULL );
 747         assert( c->c_struct_state == SLAP_C_USED );
 748         assert( c->c_conn_state != SLAP_C_INVALID );
 749
 750         /* c_mutex must be locked by caller */
 751
 752         if( c->c_conn_state != SLAP_C_CLOSING ) {
 753                 ber_socket_t    sd;
 754
 755                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 756 #ifdef NEW_LOGGING
 757                 LDAP_LOG( CONNECTION, DETAIL1,
 758                            "connection_closing: conn %lu readying socket %d for close.\n",
 759                            c->c_connid, sd, 0 );
 760 #else
 761                 Debug( LDAP_DEBUG_TRACE,
 762                         "connection_closing: readying conn=%lu sd=%d for close\n",
 763                         c->c_connid, sd, 0 );
 764 #endif
 765                 /* update state to closing */
 766                 c->c_conn_state = SLAP_C_CLOSING;
 767
 768                 /* don't listen on this port anymore */
 769                 slapd_clr_read( sd, 1 );
 770
 771                 /* abandon active operations */
 772                 connection_abandon( c );
 773
 774                 /* wake write blocked operations */
 775                 slapd_clr_write( sd, 1 );
 776                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 777         }
 778 }
 779
 780 static void connection_close( Connection *c )
 781 {
 782         ber_socket_t    sd;
 783
 784         assert( connections != NULL );
 785         assert( c != NULL );
 786         assert( c->c_struct_state == SLAP_C_USED );
 787         assert( c->c_conn_state == SLAP_C_CLOSING );
 788
 789         /* note: connections_mutex and c_mutex should be locked by caller */
 790
 791         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 792         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 793 #ifdef NEW_LOGGING
 794                 LDAP_LOG( CONNECTION, DETAIL1,
 795                            "connection_close: conn %lu  deferring sd %d\n",
 796                            c->c_connid, sd, 0 );
 797 #else
 798                 Debug( LDAP_DEBUG_TRACE,
 799                         "connection_close: deferring conn=%lu sd=%d\n",
 800                         c->c_connid, sd, 0 );
 801 #endif
 802                 return;
 803         }
 804
 805 #ifdef NEW_LOGGING
 806         LDAP_LOG( CONNECTION, RESULTS,
 807                    "connection_close: conn %lu  sd %d\n", c->c_connid, sd, 0 );
 808 #else
 809         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 810                 c->c_connid, sd, 0 );
 811 #endif
 812         connection_destroy( c );
 813 }
 814
 815 unsigned long connections_nextid(void)
 816 {
 817         unsigned long id;
 818         assert( connections != NULL );
 819
 820         ldap_pvt_thread_mutex_lock( &connections_mutex );
 821
 822         id = conn_nextid;
 823
 824         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 825
 826         return id;
 827 }
 828
 829 Connection* connection_first( ber_socket_t *index )
 830 {
 831         assert( connections != NULL );
 832         assert( index != NULL );
 833
 834         ldap_pvt_thread_mutex_lock( &connections_mutex );
 835
 836         *index = 0;
 837
 838         return connection_next(NULL, index);
 839 }
 840
 841 Connection* connection_next( Connection *c, ber_socket_t *index )
 842 {
 843         assert( connections != NULL );
 844         assert( index != NULL );
 845         assert( *index <= dtblsize );
 846
 847         if( c != NULL ) {
 848                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 849         }
 850
 851         c = NULL;
 852
 853         for(; *index < dtblsize; (*index)++) {
 854                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 855                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 856 #ifndef HAVE_WINSOCK
 857                         continue;
 858 #else
 859                         break;
 860 #endif
 861                 }
 862
 863                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 864                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 865                         c = &connections[(*index)++];
 866                         break;
 867                 }
 868
 869                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 870                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 871         }
 872
 873         if( c != NULL ) {
 874                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 875         }
 876
 877         return c;
 878 }
 879
 880 void connection_done( Connection *c )
 881 {
 882         assert( connections != NULL );
 883
 884         if( c != NULL ) {
 885                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 886         }
 887
 888         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 889 }
 890
 891 /*
 892  * connection_activity - handle the request operation op on connection
 893  * conn.  This routine figures out what kind of operation it is and
 894  * calls the appropriate stub to handle it.
 895  */
 896
 897 #ifdef SLAPD_MONITOR
 898 #define INCR_OP(var,index) \
 899         do { \
 900                 ldap_pvt_thread_mutex_lock( &num_ops_mutex ); \
 901                 (var)[(index)]++; \
 902                 ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); \
 903         } while (0)
 904 #else /* !SLAPD_MONITOR */
 905 #define INCR_OP(var,index)
 906 #endif /* !SLAPD_MONITOR */
 907
 908 static void *
 909 connection_operation( void *ctx, void *arg_v )
 910 {
 911         int rc;
 912         struct co_arg   *arg = arg_v;
 913         ber_tag_t tag = arg->co_op->o_tag;
 914 #ifdef SLAPD_MONITOR
 915         ber_tag_t oldtag = tag;
 916 #endif /* SLAPD_MONITOR */
 917         Connection *conn = arg->co_conn;
 918
 919         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 920         num_ops_initiated++;
 921         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 922
 923         arg->co_op->o_threadctx = ctx;
 924
 925         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 926 #ifdef NEW_LOGGING
 927                 LDAP_LOG( CONNECTION, ERR,
 928                         "connection_operation: conn %lu SASL bind in progress (tag=%ld).\n",
 929                         conn->c_connid, (long)tag, 0 );
 930 #else
 931                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 932                         "error: SASL bind in progress (tag=%ld).\n",
 933                         (long) tag, 0, 0 );
 934 #endif
 935                 send_ldap_result( conn, arg->co_op,
 936                         rc = LDAP_OPERATIONS_ERROR,
 937                         NULL, "SASL bind in progress", NULL, NULL );
 938                 goto operations_error;
 939         }
 940
 941         switch ( tag ) {
 942         case LDAP_REQ_BIND:
 943                 INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
 944                 rc = do_bind( conn, arg->co_op );
 945                 break;
 946
 947         case LDAP_REQ_UNBIND:
 948                 INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
 949                 rc = do_unbind( conn, arg->co_op );
 950                 break;
 951
 952         case LDAP_REQ_ADD:
 953                 INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
 954                 rc = do_add( conn, arg->co_op );
 955                 break;
 956
 957         case LDAP_REQ_DELETE:
 958                 INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
 959                 rc = do_delete( conn, arg->co_op );
 960                 break;
 961
 962         case LDAP_REQ_MODRDN:
 963                 INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
 964                 rc = do_modrdn( conn, arg->co_op );
 965                 break;
 966
 967         case LDAP_REQ_MODIFY:
 968                 INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
 969                 rc = do_modify( conn, arg->co_op );
 970                 break;
 971
 972         case LDAP_REQ_COMPARE:
 973                 INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
 974                 rc = do_compare( conn, arg->co_op );
 975                 break;
 976
 977         case LDAP_REQ_SEARCH:
 978                 INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
 979                 rc = do_search( conn, arg->co_op );
 980                 break;
 981
 982         case LDAP_REQ_ABANDON:
 983                 INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
 984                 rc = do_abandon( conn, arg->co_op );
 985                 break;
 986
 987         case LDAP_REQ_EXTENDED:
 988                 INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
 989                 rc = do_extended( conn, arg->co_op );
 990                 break;
 991
 992         default:
 993 #ifdef NEW_LOGGING
 994                 LDAP_LOG( CONNECTION, INFO,
 995                            "connection_operation: conn %lu  unknown LDAP request 0x%lx\n",
 996                            conn->c_connid, tag, 0  );
 997 #else
 998                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
 999                     tag, 0, 0 );
1000 #endif
1001                 arg->co_op->o_tag = LBER_ERROR;
1002                 send_ldap_disconnect( conn, arg->co_op,
1003                         LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
1004                 rc = -1;
1005                 break;
1006         }
1007
1008 #ifdef SLAPD_MONITOR
1009         oldtag = tag;
1010 #endif /* SLAPD_MONITOR */
1011         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
1012
1013 operations_error:
1014         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
1015         num_ops_completed++;
1016 #ifdef SLAPD_MONITOR
1017         switch (oldtag) {
1018         case LDAP_REQ_BIND:
1019                 num_ops_completed_[SLAP_OP_BIND]++;
1020                 break;
1021         case LDAP_REQ_UNBIND:
1022                 num_ops_completed_[SLAP_OP_UNBIND]++;
1023                 break;
1024         case LDAP_REQ_ADD:
1025                 num_ops_completed_[SLAP_OP_ADD]++;
1026                 break;
1027         case LDAP_REQ_DELETE:
1028                 num_ops_completed_[SLAP_OP_DELETE]++;
1029                 break;
1030         case LDAP_REQ_MODRDN:
1031                 num_ops_completed_[SLAP_OP_MODRDN]++;
1032                 break;
1033         case LDAP_REQ_MODIFY:
1034                 num_ops_completed_[SLAP_OP_MODIFY]++;
1035                 break;
1036         case LDAP_REQ_COMPARE:
1037                 num_ops_completed_[SLAP_OP_COMPARE]++;
1038                 break;
1039         case LDAP_REQ_SEARCH:
1040                 num_ops_completed_[SLAP_OP_SEARCH]++;
1041                 break;
1042         case LDAP_REQ_ABANDON:
1043                 num_ops_completed_[SLAP_OP_ABANDON]++;
1044                 break;
1045         case LDAP_REQ_EXTENDED:
1046                 num_ops_completed_[SLAP_OP_EXTENDED]++;
1047                 break;
1048         }
1049 #endif /* SLAPD_MONITOR */
1050         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1051
1052         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1053
1054         conn->c_n_ops_executing--;
1055         conn->c_n_ops_completed++;
1056
1057         LDAP_STAILQ_REMOVE( &conn->c_ops, arg->co_op, slap_op, o_next);
1058         LDAP_STAILQ_NEXT(arg->co_op, o_next) = NULL;
1059         slap_op_free( arg->co_op );
1060         arg->co_op = NULL;
1061         arg->co_conn = NULL;
1062         free( (char *) arg );
1063         arg = NULL;
1064
1065         switch( tag ) {
1066         case LBER_ERROR:
1067         case LDAP_REQ_UNBIND:
1068                 /* c_mutex is locked */
1069                 connection_closing( conn );
1070                 break;
1071
1072         case LDAP_REQ_BIND:
1073                 conn->c_sasl_bind_in_progress =
1074                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1075
1076                 if( conn->c_conn_state == SLAP_C_BINDING) {
1077                         conn->c_conn_state = SLAP_C_ACTIVE;
1078                 }
1079         }
1080
1081         connection_resched( conn );
1082
1083         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1084
1085         return NULL;
1086 }
1087
1088 int connection_read(ber_socket_t s)
1089 {
1090         int rc = 0;
1091         Connection *c;
1092
1093         assert( connections != NULL );
1094
1095         ldap_pvt_thread_mutex_lock( &connections_mutex );
1096
1097         /* get (locked) connection */
1098         c = connection_get( s );
1099
1100         if( c == NULL ) {
1101 #ifdef NEW_LOGGING
1102                 LDAP_LOG( CONNECTION, INFO,
1103                         "connection_read: sock %ld no connection\n", (long)s, 0, 0 );
1104 #else
1105                 Debug( LDAP_DEBUG_ANY,
1106                         "connection_read(%ld): no connection!\n",
1107                         (long) s, 0, 0 );
1108 #endif
1109                 slapd_remove(s, 0);
1110
1111                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1112                 return -1;
1113         }
1114
1115         c->c_n_read++;
1116
1117         if( c->c_conn_state == SLAP_C_CLOSING ) {
1118 #ifdef NEW_LOGGING
1119                 LDAP_LOG( CONNECTION, INFO,
1120                         "connection_read: conn %lu connection closing, ignoring input\n",
1121                         c->c_connid, 0, 0 );
1122 #else
1123                 Debug( LDAP_DEBUG_TRACE,
1124                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1125                         s, c->c_connid, 0 );
1126 #endif
1127                 connection_return( c );
1128                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1129                 return 0;
1130         }
1131
1132 #ifdef NEW_LOGGING
1133         LDAP_LOG( CONNECTION, DETAIL1,
1134                    "connection_read: conn %lu  checking for input.\n",
1135                    c->c_connid, 0, 0  );
1136 #else
1137         Debug( LDAP_DEBUG_TRACE,
1138                 "connection_read(%d): checking for input on id=%lu\n",
1139                 s, c->c_connid, 0 );
1140 #endif
1141
1142 #ifdef HAVE_TLS
1143         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1144                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1145                 if ( rc < 0 ) {
1146 #if 0 /* required by next #if 0 */
1147                         struct timeval tv;
1148                         fd_set rfd;
1149 #endif
1150
1151 #ifdef NEW_LOGGING
1152                         LDAP_LOG( CONNECTION, ERR,
1153                                    "connection_read: conn %lu  TLS accept error, error %d\n",
1154                                    c->c_connid, rc, 0 );
1155 #else
1156                         Debug( LDAP_DEBUG_TRACE,
1157                                 "connection_read(%d): TLS accept error "
1158                                 "error=%d id=%lu, closing\n",
1159                                 s, rc, c->c_connid );
1160 #endif
1161                         c->c_needs_tls_accept = 0;
1162                         /* connections_mutex and c_mutex are locked */
1163                         connection_closing( c );
1164
1165 #if 0
1166                         /* Drain input before close, to allow SSL error codes
1167                          * to propagate to client. */
1168                         FD_ZERO(&rfd);
1169                         FD_SET(s, &rfd);
1170                         for (rc=1; rc>0;) {
1171                             tv.tv_sec = 1;
1172                             tv.tv_usec = 0;
1173                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1174                             if (rc == 1) {
1175                                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL);
1176                                 }
1177                         }
1178 #endif
1179                         connection_close( c );
1180
1181                 } else if ( rc == 0 ) {
1182                         void *ssl;
1183                         struct berval authid = { 0, NULL };
1184
1185                         c->c_needs_tls_accept = 0;
1186
1187                         /* we need to let SASL know */
1188                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1189
1190                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1191                         if( c->c_tls_ssf > c->c_ssf ) {
1192                                 c->c_ssf = c->c_tls_ssf;
1193                         }
1194
1195                         rc = dnX509peerNormalize( ssl, &authid );
1196                         if ( rc != LDAP_SUCCESS ) {
1197 #ifdef NEW_LOGGING
1198                                 LDAP_LOG( CONNECTION, INFO,
1199                                         "connection_read: conn %lu unable to get TLS client DN, "
1200                                         "error %d\n", c->c_connid, rc, 0 );
1201 #else
1202                                 Debug( LDAP_DEBUG_TRACE,
1203                                 "connection_read(%d): unable to get TLS client DN "
1204                                 "error=%d id=%lu\n",
1205                                 s, rc, c->c_connid );
1206 #endif
1207                         }
1208                         slap_sasl_external( c, c->c_tls_ssf, authid.bv_val );
1209                         if ( authid.bv_val )    free( authid.bv_val );
1210                 }
1211
1212                 /* if success and data is ready, fall thru to data input loop */
1213                 if( rc != 0 ||
1214                         !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1215                 {
1216                         connection_return( c );
1217                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1218                         return 0;
1219                 }
1220         }
1221 #endif
1222
1223 #ifdef HAVE_CYRUS_SASL
1224         if ( c->c_sasl_layers ) {
1225                 c->c_sasl_layers = 0;
1226
1227                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
1228
1229                 if( rc != LDAP_SUCCESS ) {
1230 #ifdef NEW_LOGGING
1231                         LDAP_LOG( CONNECTION, ERR,
1232                                 "connection_read: conn %lu SASL install error %d, closing\n",
1233                                 c->c_connid, rc, 0 );
1234 #else
1235                         Debug( LDAP_DEBUG_TRACE,
1236                                 "connection_read(%d): SASL install error "
1237                                 "error=%d id=%lu, closing\n",
1238                                 s, rc, c->c_connid );
1239 #endif
1240                         /* connections_mutex and c_mutex are locked */
1241                         connection_closing( c );
1242                         connection_close( c );
1243                         connection_return( c );
1244                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1245                         return 0;
1246                 }
1247         }
1248 #endif
1249
1250 #define CONNECTION_INPUT_LOOP 1
1251
1252 #ifdef DATA_READY_LOOP
1253         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
1254 #elif CONNECTION_INPUT_LOOP
1255         while(!rc)
1256 #endif
1257         {
1258                 /* How do we do this without getting into a busy loop ? */
1259                 rc = connection_input( c );
1260         }
1261
1262         if( rc < 0 ) {
1263 #ifdef NEW_LOGGING
1264                 LDAP_LOG( CONNECTION, ERR,
1265                         "connection_read: conn %lu  input error %d, closing.\n",
1266                         c->c_connid, rc, 0 );
1267 #else
1268                 Debug( LDAP_DEBUG_TRACE,
1269                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1270                         s, rc, c->c_connid );
1271 #endif
1272                 /* connections_mutex and c_mutex are locked */
1273                 connection_closing( c );
1274                 connection_close( c );
1275                 connection_return( c );
1276                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1277                 return 0;
1278         }
1279
1280         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1281                 slapd_set_read( s, 1 );
1282         }
1283
1284         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1285                 slapd_set_write( s, 1 );
1286         }
1287
1288         connection_return( c );
1289         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1290         return 0;
1291 }
1292
1293 static int
1294 connection_input(
1295     Connection *conn
1296 )
1297 {
1298         Operation *op;
1299         ber_tag_t       tag;
1300         ber_len_t       len;
1301         ber_int_t       msgid;
1302         BerElement      *ber;
1303 #ifdef LDAP_CONNECTIONLESS
1304         Sockaddr        peeraddr;
1305         char            *cdn = NULL;
1306 #endif
1307
1308         if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
1309             == NULL ) {
1310 #ifdef NEW_LOGGING
1311                 LDAP_LOG( CONNECTION, ERR,
1312                         "connection_input: conn %lu  ber_alloc failed.\n",
1313                         conn->c_connid, 0, 0 );
1314 #else
1315                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1316 #endif
1317                 return -1;
1318         }
1319
1320         errno = 0;
1321
1322 #ifdef LDAP_CONNECTIONLESS
1323         if (conn->c_is_udp)
1324         {
1325                 char    peername[sizeof("IP=255.255.255.255:65336")];
1326                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1327                         sizeof(struct sockaddr));
1328                 if (len != sizeof(struct sockaddr))
1329                         return 1;
1330                 sprintf( peername, "IP=%s:%d",
1331                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1332                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1333                 Statslog( LDAP_DEBUG_STATS,
1334                         "conn=%lu UDP request from %s (%s) accepted.\n",
1335                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1336         }
1337 #endif
1338         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1339         if ( tag != LDAP_TAG_MESSAGE ) {
1340                 int err = errno;
1341                 ber_socket_t    sd;
1342
1343                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1344
1345 #ifdef NEW_LOGGING
1346                 LDAP_LOG( CONNECTION, ERR,
1347                         "connection_input: conn %lu  ber_get_next failed, errno %d (%s).\n",
1348                         conn->c_connid, err, sock_errstr(err) );
1349 #else
1350                 Debug( LDAP_DEBUG_TRACE,
1351                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1352                         sd, err, sock_errstr(err) );
1353 #endif
1354                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1355                         /* log, close and send error */
1356                         ber_free( conn->c_currentber, 1 );
1357                         conn->c_currentber = NULL;
1358
1359                         return -2;
1360                 }
1361                 return 1;
1362         }
1363
1364         ber = conn->c_currentber;
1365         conn->c_currentber = NULL;
1366
1367         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1368                 /* log, close and send error */
1369 #ifdef NEW_LOGGING
1370                 LDAP_LOG( CONNECTION, ERR,
1371                         "connection_input: conn %lu  ber_get_int returns 0x%lx.\n",
1372                         conn->c_connid, tag, 0 );
1373 #else
1374                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1375                     0 );
1376 #endif
1377                 ber_free( ber, 1 );
1378                 return -1;
1379         }
1380
1381         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1382                 /* log, close and send error */
1383 #ifdef NEW_LOGGING
1384                 LDAP_LOG( CONNECTION, ERR,
1385                            "connection_input: conn %lu  ber_peek_tag returns 0x%lx.\n",
1386                            conn->c_connid, tag, 0 );
1387 #else
1388                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1389                     0 );
1390 #endif
1391                 ber_free( ber, 1 );
1392
1393                 return -1;
1394         }
1395
1396 #ifdef LDAP_CONNECTIONLESS
1397         if (conn->c_is_udp) {
1398                 if (tag == LBER_OCTETSTRING) {
1399                         ber_get_stringa( ber, &cdn );
1400                         tag = ber_peek_tag(ber, &len);
1401                 }
1402                 if (tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH) {
1403 #ifdef NEW_LOGGING
1404                     LDAP_LOG( CONNECTION, ERR,
1405                                "connection_input: conn %lu  invalid req for UDP 0x%lx.\n",
1406                                conn->c_connid, tag, 0 );
1407 #else
1408                     Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1409                         0 );
1410 #endif
1411                     ber_free( ber, 1 );
1412                     return 0;
1413                 }
1414         }
1415 #endif
1416         if(tag == LDAP_REQ_BIND) {
1417                 /* immediately abandon all exiting operations upon BIND */
1418                 connection_abandon( conn );
1419         }
1420
1421         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1422
1423         op->vrFilter = NULL;
1424
1425         op->o_pagedresults_state = conn->c_pagedresults_state;
1426
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         if ( conn->c_conn_state == SLAP_C_BINDING
1435                 || conn->c_conn_state == SLAP_C_CLOSING )
1436         {
1437 #ifdef NEW_LOGGING
1438                 LDAP_LOG( CONNECTION, INFO,
1439                         "connection_input: conn %lu  deferring operation\n",
1440                         conn->c_connid, 0, 0 );
1441 #else
1442                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1443 #endif
1444                 conn->c_n_ops_pending++;
1445                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1446
1447         } else {
1448                 conn->c_n_ops_executing++;
1449                 connection_op_activate( conn, op );
1450         }
1451
1452 #ifdef NO_THREADS
1453         if ( conn->c_struct_state != SLAP_C_USED ) {
1454                 /* connection must have got closed underneath us */
1455                 return 1;
1456         }
1457 #endif
1458         assert( conn->c_struct_state == SLAP_C_USED );
1459
1460         return 0;
1461 }
1462
1463 static int
1464 connection_resched( Connection *conn )
1465 {
1466         Operation *op;
1467
1468         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1469                 int rc;
1470                 ber_socket_t    sd;
1471                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1472
1473                 /* us trylock to avoid possible deadlock */
1474                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1475
1476                 if( rc ) {
1477 #ifdef NEW_LOGGING
1478                         LDAP_LOG( CONNECTION, DETAIL1,
1479                                 "connection_resched: conn %lu  reaquiring locks.\n",
1480                                 conn->c_connid, 0, 0 );
1481 #else
1482                         Debug( LDAP_DEBUG_TRACE,
1483                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1484                                 conn->c_connid, sd, 0 );
1485 #endif
1486                         /*
1487                          * reaquire locks in the right order...
1488                          * this may allow another thread to close this connection,
1489                          * so recheck state below.
1490                          */
1491                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1492                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1493                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1494                 }
1495
1496                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1497 #ifdef NEW_LOGGING
1498                         LDAP_LOG( CONNECTION, INFO,
1499                                 "connection_resched: conn %lu  closed by other thread.\n",
1500                                 conn->c_connid, 0, 0 );
1501 #else
1502                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1503                                 "closed by other thread conn=%lu sd=%d\n",
1504                                 conn->c_connid, sd, 0 );
1505 #endif
1506                 } else {
1507 #ifdef NEW_LOGGING
1508                         LDAP_LOG( CONNECTION, DETAIL1,
1509                                 "connection_resched: conn %lu  attempting closing.\n",
1510                                 conn->c_connid, 0, 0 );
1511 #else
1512                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1513                                 "attempting closing conn=%lu sd=%d\n",
1514                                 conn->c_connid, sd, 0 );
1515 #endif
1516                         connection_close( conn );
1517                 }
1518
1519                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1520                 return 0;
1521         }
1522
1523         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1524                 /* other states need different handling */
1525                 return 0;
1526         }
1527
1528         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1529                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1530                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1531                 /* pending operations should not be marked for abandonment */
1532                 assert(!op->o_abandon);
1533
1534                 conn->c_n_ops_pending--;
1535                 conn->c_n_ops_executing++;
1536
1537                 connection_op_activate( conn, op );
1538
1539                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1540                         break;
1541                 }
1542         }
1543         return 0;
1544 }
1545
1546 static int connection_op_activate( Connection *conn, Operation *op )
1547 {
1548         struct co_arg *arg;
1549         int status;
1550         ber_tag_t tag = op->o_tag;
1551
1552         if(tag == LDAP_REQ_BIND) {
1553                 conn->c_conn_state = SLAP_C_BINDING;
1554         }
1555
1556         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1557         arg->co_conn = conn;
1558         arg->co_op = op;
1559
1560         if (!arg->co_op->o_dn.bv_len) {
1561             arg->co_op->o_authz = conn->c_authz;
1562             arg->co_op->o_dn.bv_val = ch_strdup( conn->c_dn.bv_val ?
1563                 conn->c_dn.bv_val : "" );
1564             arg->co_op->o_ndn.bv_val = ch_strdup( conn->c_ndn.bv_val ?
1565                 conn->c_ndn.bv_val : "" );
1566         }
1567         arg->co_op->o_authtype = conn->c_authtype;
1568         ber_dupbv( &arg->co_op->o_authmech, &conn->c_authmech );
1569
1570         if (!arg->co_op->o_protocol) {
1571             arg->co_op->o_protocol = conn->c_protocol
1572                 ? conn->c_protocol : LDAP_VERSION3;
1573         }
1574         arg->co_op->o_connid = conn->c_connid;
1575
1576         LDAP_STAILQ_INSERT_TAIL( &conn->c_ops, arg->co_op, o_next );
1577
1578         status = ldap_pvt_thread_pool_submit( &connection_pool,
1579                 connection_operation, (void *) arg );
1580
1581         if ( status != 0 ) {
1582 #ifdef NEW_LOGGING
1583                 LDAP_LOG( CONNECTION, ERR,
1584                         "connection_op_activate: conn %lu        thread pool submit failed.\n",
1585                         conn->c_connid, 0, 0 );
1586 #else
1587                 Debug( LDAP_DEBUG_ANY,
1588                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1589 #endif
1590                 /* should move op to pending list */
1591         }
1592
1593         return status;
1594 }
1595
1596 int connection_write(ber_socket_t s)
1597 {
1598         Connection *c;
1599
1600         assert( connections != NULL );
1601
1602         ldap_pvt_thread_mutex_lock( &connections_mutex );
1603
1604         c = connection_get( s );
1605
1606         slapd_clr_write( s, 0);
1607
1608         if( c == NULL ) {
1609 #ifdef NEW_LOGGING
1610                 LDAP_LOG( CONNECTION, ERR,
1611                         "connection_write: sock %ld  no connection!\n", (long)s, 0, 0);
1612 #else
1613                 Debug( LDAP_DEBUG_ANY,
1614                         "connection_write(%ld): no connection!\n",
1615                         (long) s, 0, 0 );
1616 #endif
1617                 slapd_remove(s, 0);
1618                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1619                 return -1;
1620         }
1621
1622         c->c_n_write++;
1623
1624 #ifdef NEW_LOGGING
1625         LDAP_LOG( CONNECTION, DETAIL1,
1626                 "connection_write conn %lu  waking output.\n", c->c_connid, 0, 0 );
1627 #else
1628         Debug( LDAP_DEBUG_TRACE,
1629                 "connection_write(%d): waking output for id=%lu\n",
1630                 s, c->c_connid, 0 );
1631 #endif
1632         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1633
1634         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1635                 slapd_set_read( s, 1 );
1636         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1637                 slapd_set_write( s, 1 );
1638         connection_return( c );
1639         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1640         return 0;
1641 }
1642