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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6
   7 #include "portable.h"
   8
   9 #include <stdio.h>
  10 #include <limits.h>
  11
  12 #include <ac/socket.h>
  13 #include <ac/errno.h>
  14 #include <ac/string.h>
  15 #include <ac/time.h>
  16 #include <ac/unistd.h>
  17
  18 #include "ldap_pvt.h"
  19 #include "lutil.h"
  20 #include "slap.h"
  21
  22 /* protected by connections_mutex */
  23 static ldap_pvt_thread_mutex_t connections_mutex;
  24 static Connection *connections = NULL;
  25 static unsigned long conn_nextid = 0;
  26
  27 /* structure state (protected by connections_mutex) */
  28 #define SLAP_C_UNINITIALIZED    0x00    /* MUST BE ZERO (0) */
  29 #define SLAP_C_UNUSED                   0x01
  30 #define SLAP_C_USED                             0x02
  31
  32 /* connection state (protected by c_mutex ) */
  33 #define SLAP_C_INVALID                  0x00    /* MUST BE ZERO (0) */
  34 #define SLAP_C_INACTIVE                 0x01    /* zero threads */
  35 #define SLAP_C_ACTIVE                   0x02    /* one or more threads */
  36 #define SLAP_C_BINDING                  0x03    /* binding */
  37 #define SLAP_C_CLOSING                  0x04    /* closing */
  38
  39 const char *
  40 connection_state2str( int state )
  41 {
  42         switch( state ) {
  43         case SLAP_C_INVALID:    return "!";
  44         case SLAP_C_INACTIVE:   return "|";
  45         case SLAP_C_ACTIVE:             return "";
  46         case SLAP_C_BINDING:    return "B";
  47         case SLAP_C_CLOSING:    return "C";
  48         }
  49
  50         return "?";
  51 }
  52
  53 static Connection* connection_get( ber_socket_t s );
  54
  55 static int connection_input( Connection *c );
  56 static void connection_close( Connection *c );
  57
  58 static int connection_op_activate( Connection *conn, Operation *op );
  59 static int connection_resched( Connection *conn );
  60 static void connection_abandon( Connection *conn );
  61 static void connection_destroy( Connection *c );
  62
  63 static ldap_pvt_thread_start_t connection_operation;
  64
  65 struct co_arg {
  66         Connection      *co_conn;
  67         Operation       *co_op;
  68 };
  69
  70 /*
  71  * Initialize connection management infrastructure.
  72  */
  73 int connections_init(void)
  74 {
  75         assert( connections == NULL );
  76
  77         if( connections != NULL) {
  78 #ifdef NEW_LOGGING
  79                 LDAP_LOG( CONNECTION, INFO,
  80                            "connections_init:  already initialized.\n", 0, 0, 0 );
  81 #else
  82                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
  83                         0, 0, 0 );
  84 #endif
  85                 return -1;
  86         }
  87
  88         /* should check return of every call */
  89         ldap_pvt_thread_mutex_init( &connections_mutex );
  90
  91         connections = (Connection *) calloc( dtblsize, sizeof(Connection) );
  92
  93         if( connections == NULL ) {
  94 #ifdef NEW_LOGGING
  95                 LDAP_LOG( CONNECTION, ERR,
  96                            "connections_init: allocation (%d * %ld) of connection "
  97                            "array failed\n", dtblsize, (long) sizeof(Connection), 0 );
  98 #else
  99                 Debug( LDAP_DEBUG_ANY,
 100                         "connections_init: allocation (%d*%ld) of connection array failed\n",
 101                         dtblsize, (long) sizeof(Connection), 0 );
 102 #endif
 103                 return -1;
 104         }
 105
 106     assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
 107     assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 108
 109         /*
 110          * per entry initialization of the Connection array initialization
 111          * will be done by connection_init()
 112          */
 113
 114         return 0;
 115 }
 116
 117 /*
 118  * Destroy connection management infrastructure.
 119  */
 120 int connections_destroy(void)
 121 {
 122         ber_socket_t i;
 123
 124         /* should check return of every call */
 125
 126         if( connections == NULL) {
 127 #ifdef NEW_LOGGING
 128                 LDAP_LOG( CONNECTION, INFO,
 129                            "connections_destroy: nothing to destroy.\n", 0, 0, 0 );
 130 #else
 131                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
 132                         0, 0, 0 );
 133 #endif
 134                 return -1;
 135         }
 136
 137         for ( i = 0; i < dtblsize; i++ ) {
 138                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 139                         ber_sockbuf_free( connections[i].c_sb );
 140                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 141                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
 142                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 143                 }
 144         }
 145
 146         free( connections );
 147         connections = NULL;
 148
 149         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 150         return 0;
 151 }
 152
 153 /*
 154  * shutdown all connections
 155  */
 156 int connections_shutdown(void)
 157 {
 158         ber_socket_t i;
 159
 160         ldap_pvt_thread_mutex_lock( &connections_mutex );
 161
 162         for ( i = 0; i < dtblsize; i++ ) {
 163                 if( connections[i].c_struct_state != SLAP_C_USED ) {
 164                         continue;
 165                 }
 166
 167                 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 168
 169                 /* connections_mutex and c_mutex are locked */
 170                 connection_closing( &connections[i] );
 171                 connection_close( &connections[i] );
 172
 173                 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 174         }
 175
 176         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 177
 178         return 0;
 179 }
 180
 181 /*
 182  * Timeout idle connections.
 183  */
 184 int connections_timeout_idle(time_t now)
 185 {
 186         int i = 0;
 187         int connindex;
 188         Connection* c;
 189
 190         for( c = connection_first( &connindex );
 191                 c != NULL;
 192                 c = connection_next( c, &connindex ) )
 193         {
 194                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 195                         /* close it */
 196                         connection_closing( c );
 197                         connection_close( c );
 198                         i++;
 199                 }
 200         }
 201         connection_done( c );
 202
 203         return i;
 204 }
 205
 206 static Connection* connection_get( ber_socket_t s )
 207 {
 208         /* connections_mutex should be locked by caller */
 209
 210         Connection *c;
 211
 212 #ifdef NEW_LOGGING
 213         LDAP_LOG( CONNECTION, ENTRY, "connection_get: socket %ld\n", (long)s, 0, 0 );
 214 #else
 215         Debug( LDAP_DEBUG_ARGS,
 216                 "connection_get(%ld)\n",
 217                 (long) s, 0, 0 );
 218 #endif
 219
 220         assert( connections != NULL );
 221
 222         if(s == AC_SOCKET_INVALID) {
 223                 return NULL;
 224         }
 225
 226 #ifndef HAVE_WINSOCK
 227         c = &connections[s];
 228
 229         assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 230
 231 #else
 232         c = NULL;
 233         {
 234                 ber_socket_t i, sd;
 235
 236                 for(i=0; i<dtblsize; i++) {
 237                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 238                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 239                                 assert( connections[i].c_sb == 0 );
 240                                 break;
 241                         }
 242
 243                         ber_sockbuf_ctrl( connections[i].c_sb,
 244                                 LBER_SB_OPT_GET_FD, &sd );
 245
 246                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 247                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 248                                 assert( sd == AC_SOCKET_INVALID );
 249                                 continue;
 250                         }
 251
 252                         /* state can actually change from used -> unused by resched,
 253                          * so don't assert details here.
 254                          */
 255
 256                         if( sd == s ) {
 257                                 c = &connections[i];
 258                                 break;
 259                         }
 260                 }
 261         }
 262 #endif
 263
 264         if( c != NULL ) {
 265                 ber_socket_t    sd;
 266
 267                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 268
 269                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 270                 if( c->c_struct_state != SLAP_C_USED ) {
 271                         /* connection must have been closed due to resched */
 272
 273                         assert( c->c_conn_state == SLAP_C_INVALID );
 274                         assert( sd == AC_SOCKET_INVALID );
 275
 276 #ifdef NEW_LOGGING
 277                         LDAP_LOG( CONNECTION, ARGS,
 278                                 "connection_get:  connection %d not used\n", s, 0, 0 );
 279 #else
 280                         Debug( LDAP_DEBUG_TRACE,
 281                                 "connection_get(%d): connection not used\n",
 282                                 s, 0, 0 );
 283 #endif
 284
 285                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 286                         return NULL;
 287                 }
 288
 289 #ifdef NEW_LOGGING
 290                 LDAP_LOG( CONNECTION, RESULTS,
 291                         "connection_get: get for %d got connid %lu\n", s, c->c_connid, 0 );
 292 #else
 293                 Debug( LDAP_DEBUG_TRACE,
 294                         "connection_get(%d): got connid=%lu\n",
 295                         s, c->c_connid, 0 );
 296 #endif
 297
 298                 c->c_n_get++;
 299
 300                 assert( c->c_struct_state == SLAP_C_USED );
 301                 assert( c->c_conn_state != SLAP_C_INVALID );
 302                 assert( sd != AC_SOCKET_INVALID );
 303
 304 #ifdef SLAPD_MONITOR
 305                 c->c_activitytime = slap_get_time();
 306 #else
 307                 if( global_idletimeout > 0 ) {
 308                         c->c_activitytime = slap_get_time();
 309                 }
 310 #endif
 311         }
 312
 313         return c;
 314 }
 315
 316 static void connection_return( Connection *c )
 317 {
 318         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 319 }
 320
 321 long connection_init(
 322         ber_socket_t s,
 323         Listener *listener,
 324         const char* dnsname,
 325         const char* peername,
 326         int tls_udp_option,
 327         slap_ssf_t ssf,
 328         const char *authid )
 329 {
 330         unsigned long id;
 331         Connection *c;
 332
 333         assert( connections != NULL );
 334
 335         assert( listener != NULL );
 336         assert( dnsname != NULL );
 337         assert( peername != NULL );
 338
 339 #ifndef HAVE_TLS
 340         assert( tls_udp_option != 1 );
 341 #endif
 342
 343         if( s == AC_SOCKET_INVALID ) {
 344 #ifdef NEW_LOGGING
 345                 LDAP_LOG( CONNECTION, INFO,
 346                            "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 347 #else
 348                 Debug( LDAP_DEBUG_ANY,
 349                        "connection_init(%ld): invalid.\n",
 350                        (long) s, 0, 0 );
 351 #endif
 352                 return -1;
 353         }
 354
 355         assert( s >= 0 );
 356 #ifndef HAVE_WINSOCK
 357         assert( s < dtblsize );
 358 #endif
 359
 360         ldap_pvt_thread_mutex_lock( &connections_mutex );
 361
 362 #ifndef HAVE_WINSOCK
 363         c = &connections[s];
 364
 365 #else
 366         {
 367                 ber_socket_t    i;
 368
 369                 c = NULL;
 370
 371         for( i=0; i < dtblsize; i++) {
 372                 ber_socket_t    sd;
 373
 374             if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 375                 assert( connections[i].c_sb == 0 );
 376                 c = &connections[i];
 377                 break;
 378             }
 379
 380                         sd = AC_SOCKET_INVALID;
 381                         if (connections[i].c_sb != NULL)
 382                         ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd );
 383
 384             if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 385                 assert( sd == AC_SOCKET_INVALID );
 386                 c = &connections[i];
 387                 break;
 388             }
 389
 390             assert( connections[i].c_struct_state == SLAP_C_USED );
 391             assert( connections[i].c_conn_state != SLAP_C_INVALID );
 392             assert( sd != AC_SOCKET_INVALID );
 393         }
 394
 395         if( c == NULL ) {
 396 #ifdef NEW_LOGGING
 397                 LDAP_LOG( CONNECTION, INFO,
 398                            "connection_init: skt %d      connection table full (%d/%d)\n",
 399                            s, i, dtblsize );
 400 #else
 401                 Debug( LDAP_DEBUG_ANY,
 402                                 "connection_init(%d): connection table full (%d/%d)\n",
 403                                 s, i, dtblsize);
 404 #endif
 405             ldap_pvt_thread_mutex_unlock( &connections_mutex );
 406             return -1;
 407         }
 408     }
 409 #endif
 410
 411     assert( c != NULL );
 412
 413         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 414                 c->c_authmech.bv_val = NULL;
 415                 c->c_authmech.bv_len = 0;
 416                 c->c_dn.bv_val = NULL;
 417                 c->c_dn.bv_len = 0;
 418                 c->c_ndn.bv_val = NULL;
 419                 c->c_ndn.bv_len = 0;
 420                 c->c_groups = NULL;
 421
 422                 c->c_listener = NULL;
 423                 c->c_peer_domain.bv_val = NULL;
 424                 c->c_peer_domain.bv_len = 0;
 425                 c->c_peer_name.bv_val = NULL;
 426                 c->c_peer_name.bv_len = 0;
 427
 428                 LDAP_STAILQ_INIT(&c->c_ops);
 429                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 430
 431                 c->c_sasl_bind_mech.bv_val = NULL;
 432                 c->c_sasl_bind_mech.bv_len = 0;
 433                 c->c_sasl_context = NULL;
 434                 c->c_sasl_extra = NULL;
 435                 c->c_sasl_bindop = NULL;
 436
 437                 c->c_sb = ber_sockbuf_alloc( );
 438
 439                 {
 440                         ber_len_t max = sockbuf_max_incoming;
 441                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 442                 }
 443
 444                 c->c_currentber = NULL;
 445
 446                 /* should check status of thread calls */
 447                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 448                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 449                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 450
 451                 c->c_struct_state = SLAP_C_UNUSED;
 452         }
 453
 454     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 455
 456     assert( c->c_struct_state == SLAP_C_UNUSED );
 457     assert( c->c_authmech.bv_val == NULL );
 458     assert( c->c_dn.bv_val == NULL );
 459     assert( c->c_ndn.bv_val == NULL );
 460     assert( c->c_groups == NULL );
 461     assert( c->c_listener == NULL );
 462     assert( c->c_peer_domain.bv_val == NULL );
 463     assert( c->c_peer_name.bv_val == NULL );
 464     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 465     assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 466         assert( c->c_sasl_bind_mech.bv_val == NULL );
 467         assert( c->c_sasl_context == NULL );
 468         assert( c->c_sasl_extra == NULL );
 469         assert( c->c_sasl_bindop == NULL );
 470         assert( c->c_currentber == NULL );
 471
 472         c->c_listener = listener;
 473         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 474         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 475
 476     c->c_n_ops_received = 0;
 477     c->c_n_ops_executing = 0;
 478     c->c_n_ops_pending = 0;
 479     c->c_n_ops_completed = 0;
 480
 481         c->c_n_get = 0;
 482         c->c_n_read = 0;
 483         c->c_n_write = 0;
 484
 485         /* set to zero until bind, implies LDAP_VERSION3 */
 486         c->c_protocol = 0;
 487
 488 #ifdef SLAPD_MONITOR
 489         c->c_activitytime = c->c_starttime = slap_get_time();
 490 #else
 491         if( global_idletimeout > 0 ) {
 492                 c->c_activitytime = c->c_starttime = slap_get_time();
 493         }
 494 #endif
 495
 496 #ifdef LDAP_CONNECTIONLESS
 497         c->c_is_udp = 0;
 498         if( tls_udp_option == 2 ) {
 499                 c->c_is_udp = 1;
 500 #ifdef LDAP_DEBUG
 501                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 502                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 503 #endif
 504                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 505                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 506                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 507                         LBER_SBIOD_LEVEL_PROVIDER, NULL );
 508         } else
 509 #endif
 510         {
 511 #ifdef LDAP_DEBUG
 512                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 513                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 514 #endif
 515                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 516                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 517         }
 518
 519 #ifdef LDAP_DEBUG
 520         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 521                 INT_MAX, (void*)"ldap_" );
 522 #endif
 523
 524         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 525                 c /* non-NULL */ ) < 0 )
 526         {
 527 #ifdef NEW_LOGGING
 528                 LDAP_LOG( CONNECTION, INFO,
 529                            "connection_init: conn %lu  set nonblocking failed\n",
 530                            c->c_connid, 0, 0 );
 531 #else
 532                 Debug( LDAP_DEBUG_ANY,
 533                         "connection_init(%d, %s): set nonblocking failed\n",
 534                         s, c->c_peer_name.bv_val, 0 );
 535 #endif
 536         }
 537
 538     id = c->c_connid = conn_nextid++;
 539
 540     c->c_conn_state = SLAP_C_INACTIVE;
 541     c->c_struct_state = SLAP_C_USED;
 542
 543         c->c_ssf = c->c_transport_ssf = ssf;
 544         c->c_tls_ssf = 0;
 545
 546 #ifdef HAVE_TLS
 547     if ( tls_udp_option == 1 ) {
 548             c->c_is_tls = 1;
 549             c->c_needs_tls_accept = 1;
 550     } else {
 551             c->c_is_tls = 0;
 552             c->c_needs_tls_accept = 0;
 553     }
 554 #endif
 555
 556         slap_sasl_open( c );
 557         slap_sasl_external( c, ssf, authid );
 558
 559     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 560     ldap_pvt_thread_mutex_unlock( &connections_mutex );
 561
 562     backend_connection_init(c);
 563
 564     return id;
 565 }
 566
 567 void connection2anonymous( Connection *c )
 568 {
 569         assert( connections != NULL );
 570         assert( c != NULL );
 571
 572         {
 573                 ber_len_t max = sockbuf_max_incoming;
 574                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 575         }
 576
 577         if(c->c_authmech.bv_val != NULL ) {
 578                 free(c->c_authmech.bv_val);
 579                 c->c_authmech.bv_val = NULL;
 580         }
 581         c->c_authmech.bv_len = 0;
 582
 583         if(c->c_dn.bv_val != NULL) {
 584                 free(c->c_dn.bv_val);
 585                 c->c_dn.bv_val = NULL;
 586         }
 587         c->c_dn.bv_len = 0;
 588         if(c->c_ndn.bv_val != NULL) {
 589                 free(c->c_ndn.bv_val);
 590                 c->c_ndn.bv_val = NULL;
 591         }
 592         c->c_ndn.bv_len = 0;
 593
 594         c->c_authz_backend = NULL;
 595
 596         {
 597                 GroupAssertion *g, *n;
 598                 for (g = c->c_groups; g; g=n) {
 599                         n = g->ga_next;
 600                         free(g);
 601                 }
 602                 c->c_groups = NULL;
 603         }
 604 }
 605
 606 static void
 607 connection_destroy( Connection *c )
 608 {
 609         /* note: connections_mutex should be locked by caller */
 610     ber_socket_t        sd;
 611     unsigned long       connid;
 612
 613     assert( connections != NULL );
 614     assert( c != NULL );
 615     assert( c->c_struct_state != SLAP_C_UNUSED );
 616     assert( c->c_conn_state != SLAP_C_INVALID );
 617     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 618
 619     /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 620     connid = c->c_connid;
 621
 622     backend_connection_destroy(c);
 623
 624     c->c_protocol = 0;
 625     c->c_connid = -1;
 626
 627     c->c_activitytime = c->c_starttime = 0;
 628
 629         connection2anonymous( c );
 630         c->c_listener = NULL;
 631
 632         if(c->c_peer_domain.bv_val != NULL) {
 633                 free(c->c_peer_domain.bv_val);
 634                 c->c_peer_domain.bv_val = NULL;
 635         }
 636         c->c_peer_domain.bv_len = 0;
 637         if(c->c_peer_name.bv_val != NULL) {
 638 #ifdef LDAP_PF_LOCAL
 639                 /*
 640                  * If peer was a domain socket, unlink. Mind you,
 641                  * they may be un-named. Should we leave this to
 642                  * the client?
 643                  */
 644                 if (strncmp(c->c_peer_name.bv_val, "PATH=",
 645                                         sizeof("PATH=") - 1) == 0) {
 646                         char *path = c->c_peer_name.bv_val
 647                                 + sizeof("PATH=") - 1;
 648                         if (path[0] != '\0') {
 649                                 (void)unlink(path);
 650                         }
 651                 }
 652 #endif /* LDAP_PF_LOCAL */
 653
 654                 free(c->c_peer_name.bv_val);
 655                 c->c_peer_name.bv_val = NULL;
 656         }
 657         c->c_peer_name.bv_len = 0;
 658
 659         c->c_sasl_bind_in_progress = 0;
 660         if(c->c_sasl_bind_mech.bv_val != NULL) {
 661                 free(c->c_sasl_bind_mech.bv_val);
 662                 c->c_sasl_bind_mech.bv_val = NULL;
 663         }
 664         c->c_sasl_bind_mech.bv_len = 0;
 665
 666         slap_sasl_close( c );
 667
 668         if ( c->c_currentber != NULL ) {
 669                 ber_free( c->c_currentber, 1 );
 670                 c->c_currentber = NULL;
 671         }
 672
 673         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 674         if ( sd != AC_SOCKET_INVALID ) {
 675                 slapd_remove( sd, 0 );
 676
 677                 Statslog( LDAP_DEBUG_STATS,
 678                     "conn=%lu fd=%d closed\n",
 679                         connid, sd, 0, 0, 0 );
 680         }
 681
 682         ber_sockbuf_free( c->c_sb );
 683
 684         c->c_sb = ber_sockbuf_alloc( );
 685
 686         {
 687                 ber_len_t max = sockbuf_max_incoming;
 688                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 689         }
 690
 691     c->c_conn_state = SLAP_C_INVALID;
 692     c->c_struct_state = SLAP_C_UNUSED;
 693 }
 694
 695 int connection_state_closing( Connection *c )
 696 {
 697         /* c_mutex must be locked by caller */
 698
 699         int state;
 700         assert( c != NULL );
 701         assert( c->c_struct_state == SLAP_C_USED );
 702
 703         state = c->c_conn_state;
 704
 705         assert( state != SLAP_C_INVALID );
 706
 707         return state == SLAP_C_CLOSING;
 708 }
 709
 710 static void connection_abandon( Connection *c )
 711 {
 712         /* c_mutex must be locked by caller */
 713
 714         Operation *o;
 715
 716         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
 717                 o->o_abandon = 1;
 718         }
 719
 720         /* remove pending operations */
 721         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 722                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 723                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 724                 slap_op_free( o );
 725         }
 726 }
 727
 728 void connection_closing( Connection *c )
 729 {
 730         assert( connections != NULL );
 731         assert( c != NULL );
 732         assert( c->c_struct_state == SLAP_C_USED );
 733         assert( c->c_conn_state != SLAP_C_INVALID );
 734
 735         /* c_mutex must be locked by caller */
 736
 737         if( c->c_conn_state != SLAP_C_CLOSING ) {
 738                 ber_socket_t    sd;
 739
 740                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 741 #ifdef NEW_LOGGING
 742                 LDAP_LOG( CONNECTION, DETAIL1,
 743                            "connection_closing: conn %lu readying socket %d for close.\n",
 744                            c->c_connid, sd, 0 );
 745 #else
 746                 Debug( LDAP_DEBUG_TRACE,
 747                         "connection_closing: readying conn=%lu sd=%d for close\n",
 748                         c->c_connid, sd, 0 );
 749 #endif
 750                 /* update state to closing */
 751                 c->c_conn_state = SLAP_C_CLOSING;
 752
 753                 /* don't listen on this port anymore */
 754                 slapd_clr_read( sd, 1 );
 755
 756                 /* abandon active operations */
 757                 connection_abandon( c );
 758
 759                 /* wake write blocked operations */
 760                 slapd_clr_write( sd, 1 );
 761                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 762         }
 763 }
 764
 765 static void connection_close( Connection *c )
 766 {
 767         ber_socket_t    sd;
 768
 769         assert( connections != NULL );
 770         assert( c != NULL );
 771         assert( c->c_struct_state == SLAP_C_USED );
 772         assert( c->c_conn_state == SLAP_C_CLOSING );
 773
 774         /* note: connections_mutex and c_mutex should be locked by caller */
 775
 776         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 777         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 778 #ifdef NEW_LOGGING
 779                 LDAP_LOG( CONNECTION, DETAIL1,
 780                            "connection_close: conn %lu  deferring sd %d\n",
 781                            c->c_connid, sd, 0 );
 782 #else
 783                 Debug( LDAP_DEBUG_TRACE,
 784                         "connection_close: deferring conn=%lu sd=%d\n",
 785                         c->c_connid, sd, 0 );
 786 #endif
 787                 return;
 788         }
 789
 790 #ifdef NEW_LOGGING
 791         LDAP_LOG( CONNECTION, RESULTS,
 792                    "connection_close: conn %lu  sd %d\n", c->c_connid, sd, 0 );
 793 #else
 794         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 795                 c->c_connid, sd, 0 );
 796 #endif
 797         connection_destroy( c );
 798 }
 799
 800 unsigned long connections_nextid(void)
 801 {
 802         unsigned long id;
 803         assert( connections != NULL );
 804
 805         ldap_pvt_thread_mutex_lock( &connections_mutex );
 806
 807         id = conn_nextid;
 808
 809         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 810
 811         return id;
 812 }
 813
 814 Connection* connection_first( ber_socket_t *index )
 815 {
 816         assert( connections != NULL );
 817         assert( index != NULL );
 818
 819         ldap_pvt_thread_mutex_lock( &connections_mutex );
 820
 821         *index = 0;
 822
 823         return connection_next(NULL, index);
 824 }
 825
 826 Connection* connection_next( Connection *c, ber_socket_t *index )
 827 {
 828         assert( connections != NULL );
 829         assert( index != NULL );
 830         assert( *index <= dtblsize );
 831
 832         if( c != NULL ) {
 833                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 834         }
 835
 836         c = NULL;
 837
 838         for(; *index < dtblsize; (*index)++) {
 839                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 840                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 841 #ifndef HAVE_WINSOCK
 842                         continue;
 843 #else
 844                         break;
 845 #endif
 846                 }
 847
 848                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 849                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 850                         c = &connections[(*index)++];
 851                         break;
 852                 }
 853
 854                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 855                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 856         }
 857
 858         if( c != NULL ) {
 859                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 860         }
 861
 862         return c;
 863 }
 864
 865 void connection_done( Connection *c )
 866 {
 867         assert( connections != NULL );
 868
 869         if( c != NULL ) {
 870                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 871         }
 872
 873         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 874 }
 875
 876 /*
 877  * connection_activity - handle the request operation op on connection
 878  * conn.  This routine figures out what kind of operation it is and
 879  * calls the appropriate stub to handle it.
 880  */
 881
 882 #ifdef SLAPD_MONITOR
 883 #define INCR_OP(var,index) \
 884         do { \
 885                 ldap_pvt_thread_mutex_lock( &num_ops_mutex ); \
 886                 (var)[(index)]++; \
 887                 ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); \
 888         } while (0)
 889 #else /* !SLAPD_MONITOR */
 890 #define INCR_OP(var,index)
 891 #endif /* !SLAPD_MONITOR */
 892
 893 static void *
 894 connection_operation( void *ctx, void *arg_v )
 895 {
 896         int rc;
 897         struct co_arg   *arg = arg_v;
 898         ber_tag_t tag = arg->co_op->o_tag;
 899 #ifdef SLAPD_MONITOR
 900         ber_tag_t oldtag = tag;
 901 #endif /* SLAPD_MONITOR */
 902         Connection *conn = arg->co_conn;
 903
 904         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 905         num_ops_initiated++;
 906         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 907
 908         arg->co_op->o_threadctx = ctx;
 909
 910         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 911 #ifdef NEW_LOGGING
 912                 LDAP_LOG( CONNECTION, ERR,
 913                         "connection_operation: conn %lu SASL bind in progress (tag=%ld).\n",
 914                         conn->c_connid, (long)tag, 0 );
 915 #else
 916                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 917                         "error: SASL bind in progress (tag=%ld).\n",
 918                         (long) tag, 0, 0 );
 919 #endif
 920                 send_ldap_result( conn, arg->co_op,
 921                         rc = LDAP_OPERATIONS_ERROR,
 922                         NULL, "SASL bind in progress", NULL, NULL );
 923                 goto operations_error;
 924         }
 925
 926         switch ( tag ) {
 927         case LDAP_REQ_BIND:
 928                 INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
 929                 rc = do_bind( conn, arg->co_op );
 930                 break;
 931
 932         case LDAP_REQ_UNBIND:
 933                 INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
 934                 rc = do_unbind( conn, arg->co_op );
 935                 break;
 936
 937         case LDAP_REQ_ADD:
 938                 INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
 939                 rc = do_add( conn, arg->co_op );
 940                 break;
 941
 942         case LDAP_REQ_DELETE:
 943                 INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
 944                 rc = do_delete( conn, arg->co_op );
 945                 break;
 946
 947         case LDAP_REQ_MODRDN:
 948                 INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
 949                 rc = do_modrdn( conn, arg->co_op );
 950                 break;
 951
 952         case LDAP_REQ_MODIFY:
 953                 INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
 954                 rc = do_modify( conn, arg->co_op );
 955                 break;
 956
 957         case LDAP_REQ_COMPARE:
 958                 INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
 959                 rc = do_compare( conn, arg->co_op );
 960                 break;
 961
 962         case LDAP_REQ_SEARCH:
 963                 INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
 964                 rc = do_search( conn, arg->co_op );
 965                 break;
 966
 967         case LDAP_REQ_ABANDON:
 968                 INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
 969                 rc = do_abandon( conn, arg->co_op );
 970                 break;
 971
 972         case LDAP_REQ_EXTENDED:
 973                 INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
 974                 rc = do_extended( conn, arg->co_op );
 975                 break;
 976
 977         default:
 978 #ifdef NEW_LOGGING
 979                 LDAP_LOG( CONNECTION, INFO,
 980                            "connection_operation: conn %lu  unknown LDAP request 0x%lx\n",
 981                            conn->c_connid, tag, 0  );
 982 #else
 983                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
 984                     tag, 0, 0 );
 985 #endif
 986                 arg->co_op->o_tag = LBER_ERROR;
 987                 send_ldap_disconnect( conn, arg->co_op,
 988                         LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
 989                 rc = -1;
 990                 break;
 991         }
 992
 993 #ifdef SLAPD_MONITOR
 994         oldtag = tag;
 995 #endif /* SLAPD_MONITOR */
 996         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
 997
 998 operations_error:
 999         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
1000         num_ops_completed++;
1001 #ifdef SLAPD_MONITOR
1002         switch (oldtag) {
1003         case LDAP_REQ_BIND:
1004                 num_ops_completed_[SLAP_OP_BIND]++;
1005                 break;
1006         case LDAP_REQ_UNBIND:
1007                 num_ops_completed_[SLAP_OP_UNBIND]++;
1008                 break;
1009         case LDAP_REQ_ADD:
1010                 num_ops_completed_[SLAP_OP_ADD]++;
1011                 break;
1012         case LDAP_REQ_DELETE:
1013                 num_ops_completed_[SLAP_OP_DELETE]++;
1014                 break;
1015         case LDAP_REQ_MODRDN:
1016                 num_ops_completed_[SLAP_OP_MODRDN]++;
1017                 break;
1018         case LDAP_REQ_MODIFY:
1019                 num_ops_completed_[SLAP_OP_MODIFY]++;
1020                 break;
1021         case LDAP_REQ_COMPARE:
1022                 num_ops_completed_[SLAP_OP_COMPARE]++;
1023                 break;
1024         case LDAP_REQ_SEARCH:
1025                 num_ops_completed_[SLAP_OP_SEARCH]++;
1026                 break;
1027         case LDAP_REQ_ABANDON:
1028                 num_ops_completed_[SLAP_OP_ABANDON]++;
1029                 break;
1030         case LDAP_REQ_EXTENDED:
1031                 num_ops_completed_[SLAP_OP_EXTENDED]++;
1032                 break;
1033         }
1034 #endif /* SLAPD_MONITOR */
1035         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1036
1037         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1038
1039         conn->c_n_ops_executing--;
1040         conn->c_n_ops_completed++;
1041
1042         LDAP_STAILQ_REMOVE( &conn->c_ops, arg->co_op, slap_op, o_next);
1043         LDAP_STAILQ_NEXT(arg->co_op, o_next) = NULL;
1044 #ifdef LDAP_CLIENT_UPDATE
1045         if ( !( arg->co_op->o_clientupdate_type & SLAP_LCUP_PERSIST ) )
1046 #endif /* LDAP_CLIENT_UPDATE */
1047         {
1048                 slap_op_free( arg->co_op );
1049         }
1050         arg->co_op = NULL;
1051         arg->co_conn = NULL;
1052         free( (char *) arg );
1053         arg = NULL;
1054
1055         switch( tag ) {
1056         case LBER_ERROR:
1057         case LDAP_REQ_UNBIND:
1058                 /* c_mutex is locked */
1059                 connection_closing( conn );
1060                 break;
1061
1062         case LDAP_REQ_BIND:
1063                 conn->c_sasl_bind_in_progress =
1064                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1065
1066                 if( conn->c_conn_state == SLAP_C_BINDING) {
1067                         conn->c_conn_state = SLAP_C_ACTIVE;
1068                 }
1069         }
1070
1071         connection_resched( conn );
1072
1073         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1074
1075         return NULL;
1076 }
1077
1078 int connection_read(ber_socket_t s)
1079 {
1080         int rc = 0;
1081         Connection *c;
1082
1083         assert( connections != NULL );
1084
1085         ldap_pvt_thread_mutex_lock( &connections_mutex );
1086
1087         /* get (locked) connection */
1088         c = connection_get( s );
1089
1090         if( c == NULL ) {
1091 #ifdef NEW_LOGGING
1092                 LDAP_LOG( CONNECTION, INFO,
1093                         "connection_read: sock %ld no connection\n", (long)s, 0, 0 );
1094 #else
1095                 Debug( LDAP_DEBUG_ANY,
1096                         "connection_read(%ld): no connection!\n",
1097                         (long) s, 0, 0 );
1098 #endif
1099                 slapd_remove(s, 0);
1100
1101                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1102                 return -1;
1103         }
1104
1105         c->c_n_read++;
1106
1107         if( c->c_conn_state == SLAP_C_CLOSING ) {
1108 #ifdef NEW_LOGGING
1109                 LDAP_LOG( CONNECTION, INFO,
1110                         "connection_read: conn %lu connection closing, ignoring input\n",
1111                         c->c_connid, 0, 0 );
1112 #else
1113                 Debug( LDAP_DEBUG_TRACE,
1114                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1115                         s, c->c_connid, 0 );
1116 #endif
1117                 connection_return( c );
1118                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1119                 return 0;
1120         }
1121
1122 #ifdef NEW_LOGGING
1123         LDAP_LOG( CONNECTION, DETAIL1,
1124                    "connection_read: conn %lu  checking for input.\n",
1125                    c->c_connid, 0, 0  );
1126 #else
1127         Debug( LDAP_DEBUG_TRACE,
1128                 "connection_read(%d): checking for input on id=%lu\n",
1129                 s, c->c_connid, 0 );
1130 #endif
1131
1132 #ifdef HAVE_TLS
1133         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1134                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1135                 if ( rc < 0 ) {
1136 #if 0 /* required by next #if 0 */
1137                         struct timeval tv;
1138                         fd_set rfd;
1139 #endif
1140
1141 #ifdef NEW_LOGGING
1142                         LDAP_LOG( CONNECTION, ERR,
1143                                    "connection_read: conn %lu  TLS accept error, error %d\n",
1144                                    c->c_connid, rc, 0 );
1145 #else
1146                         Debug( LDAP_DEBUG_TRACE,
1147                                 "connection_read(%d): TLS accept error "
1148                                 "error=%d id=%lu, closing\n",
1149                                 s, rc, c->c_connid );
1150 #endif
1151                         c->c_needs_tls_accept = 0;
1152                         /* connections_mutex and c_mutex are locked */
1153                         connection_closing( c );
1154
1155 #if 0
1156                         /* Drain input before close, to allow SSL error codes
1157                          * to propagate to client. */
1158                         FD_ZERO(&rfd);
1159                         FD_SET(s, &rfd);
1160                         for (rc=1; rc>0;) {
1161                             tv.tv_sec = 1;
1162                             tv.tv_usec = 0;
1163                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1164                             if (rc == 1) {
1165                                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL);
1166                                 }
1167                         }
1168 #endif
1169                         connection_close( c );
1170
1171                 } else if ( rc == 0 ) {
1172                         void *ssl;
1173                         struct berval authid = { 0, NULL };
1174
1175                         c->c_needs_tls_accept = 0;
1176
1177                         /* we need to let SASL know */
1178                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1179
1180                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1181                         if( c->c_tls_ssf > c->c_ssf ) {
1182                                 c->c_ssf = c->c_tls_ssf;
1183                         }
1184
1185                         rc = dnX509peerNormalize( ssl, &authid );
1186                         if ( rc != LDAP_SUCCESS ) {
1187 #ifdef NEW_LOGGING
1188                                 LDAP_LOG( CONNECTION, INFO,
1189                                         "connection_read: conn %lu unable to get TLS client DN, "
1190                                         "error %d\n", c->c_connid, rc, 0 );
1191 #else
1192                                 Debug( LDAP_DEBUG_TRACE,
1193                                 "connection_read(%d): unable to get TLS client DN "
1194                                 "error=%d id=%lu\n",
1195                                 s, rc, c->c_connid );
1196 #endif
1197                         }
1198                         slap_sasl_external( c, c->c_tls_ssf, authid.bv_val );
1199                         if ( authid.bv_val )    free( authid.bv_val );
1200                 }
1201
1202                 /* if success and data is ready, fall thru to data input loop */
1203                 if( rc != 0 ||
1204                         !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1205                 {
1206                         connection_return( c );
1207                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1208                         return 0;
1209                 }
1210         }
1211 #endif
1212
1213 #ifdef HAVE_CYRUS_SASL
1214         if ( c->c_sasl_layers ) {
1215                 c->c_sasl_layers = 0;
1216
1217                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
1218
1219                 if( rc != LDAP_SUCCESS ) {
1220 #ifdef NEW_LOGGING
1221                         LDAP_LOG( CONNECTION, ERR,
1222                                 "connection_read: conn %lu SASL install error %d, closing\n",
1223                                 c->c_connid, rc, 0 );
1224 #else
1225                         Debug( LDAP_DEBUG_TRACE,
1226                                 "connection_read(%d): SASL install error "
1227                                 "error=%d id=%lu, closing\n",
1228                                 s, rc, c->c_connid );
1229 #endif
1230                         /* connections_mutex and c_mutex are locked */
1231                         connection_closing( c );
1232                         connection_close( c );
1233                         connection_return( c );
1234                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1235                         return 0;
1236                 }
1237         }
1238 #endif
1239
1240 #define CONNECTION_INPUT_LOOP 1
1241
1242 #ifdef DATA_READY_LOOP
1243         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
1244 #elif CONNECTION_INPUT_LOOP
1245         while(!rc)
1246 #endif
1247         {
1248                 /* How do we do this without getting into a busy loop ? */
1249                 rc = connection_input( c );
1250         }
1251
1252         if( rc < 0 ) {
1253 #ifdef NEW_LOGGING
1254                 LDAP_LOG( CONNECTION, ERR,
1255                         "connection_read: conn %lu  input error %d, closing.\n",
1256                         c->c_connid, rc, 0 );
1257 #else
1258                 Debug( LDAP_DEBUG_TRACE,
1259                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1260                         s, rc, c->c_connid );
1261 #endif
1262                 /* connections_mutex and c_mutex are locked */
1263                 connection_closing( c );
1264                 connection_close( c );
1265                 connection_return( c );
1266                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1267                 return 0;
1268         }
1269
1270         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1271                 slapd_set_read( s, 1 );
1272         }
1273
1274         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1275                 slapd_set_write( s, 1 );
1276         }
1277
1278         connection_return( c );
1279         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1280         return 0;
1281 }
1282
1283 static int
1284 connection_input(
1285     Connection *conn
1286 )
1287 {
1288         Operation *op;
1289         ber_tag_t       tag;
1290         ber_len_t       len;
1291         ber_int_t       msgid;
1292         BerElement      *ber;
1293 #ifdef LDAP_CONNECTIONLESS
1294         Sockaddr        peeraddr;
1295         char            *cdn = NULL;
1296 #endif
1297
1298         if ( conn->c_currentber == NULL &&
1299                 ( conn->c_currentber = ber_alloc()) == NULL )
1300         {
1301 #ifdef NEW_LOGGING
1302                 LDAP_LOG( CONNECTION, ERR,
1303                         "connection_input: conn %lu  ber_alloc failed.\n",
1304                         conn->c_connid, 0, 0 );
1305 #else
1306                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1307 #endif
1308                 return -1;
1309         }
1310
1311         errno = 0;
1312
1313 #ifdef LDAP_CONNECTIONLESS
1314         if ( conn->c_is_udp ) {
1315                 char    peername[sizeof("IP=255.255.255.255:65336")];
1316                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1317                         sizeof(struct sockaddr));
1318                 if (len != sizeof(struct sockaddr))
1319                         return 1;
1320                 sprintf( peername, "IP=%s:%d",
1321                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1322                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1323                 Statslog( LDAP_DEBUG_STATS,
1324                         "conn=%lu UDP request from %s (%s) accepted.\n",
1325                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1326         }
1327 #endif
1328         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1329         if ( tag != LDAP_TAG_MESSAGE ) {
1330                 int err = errno;
1331                 ber_socket_t    sd;
1332
1333                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1334
1335 #ifdef NEW_LOGGING
1336                 LDAP_LOG( CONNECTION, ERR,
1337                         "connection_input: conn %lu  ber_get_next failed, errno %d (%s).\n",
1338                         conn->c_connid, err, sock_errstr(err) );
1339 #else
1340                 Debug( LDAP_DEBUG_TRACE,
1341                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1342                         sd, err, sock_errstr(err) );
1343 #endif
1344                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1345                         /* log, close and send error */
1346                         ber_free( conn->c_currentber, 1 );
1347                         conn->c_currentber = NULL;
1348
1349                         return -2;
1350                 }
1351                 return 1;
1352         }
1353
1354         ber = conn->c_currentber;
1355         conn->c_currentber = NULL;
1356
1357         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1358                 /* log, close and send error */
1359 #ifdef NEW_LOGGING
1360                 LDAP_LOG( CONNECTION, ERR,
1361                         "connection_input: conn %lu  ber_get_int returns 0x%lx.\n",
1362                         conn->c_connid, tag, 0 );
1363 #else
1364                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1365                     0 );
1366 #endif
1367                 ber_free( ber, 1 );
1368                 return -1;
1369         }
1370
1371         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1372                 /* log, close and send error */
1373 #ifdef NEW_LOGGING
1374                 LDAP_LOG( CONNECTION, ERR,
1375                            "connection_input: conn %lu  ber_peek_tag returns 0x%lx.\n",
1376                            conn->c_connid, tag, 0 );
1377 #else
1378                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1379                     0 );
1380 #endif
1381                 ber_free( ber, 1 );
1382
1383                 return -1;
1384         }
1385
1386 #ifdef LDAP_CONNECTIONLESS
1387         if( conn->c_is_udp ) {
1388                 if( tag == LBER_OCTETSTRING ) {
1389                         ber_get_stringa( ber, &cdn );
1390                         tag = ber_peek_tag(ber, &len);
1391                 }
1392                 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1393 #ifdef NEW_LOGGING
1394                     LDAP_LOG( CONNECTION, ERR,
1395                                "connection_input: conn %lu  invalid req for UDP 0x%lx.\n",
1396                                conn->c_connid, tag, 0 );
1397 #else
1398                     Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1399                         0 );
1400 #endif
1401                     ber_free( ber, 1 );
1402                     return 0;
1403                 }
1404         }
1405 #endif
1406         if(tag == LDAP_REQ_BIND) {
1407                 /* immediately abandon all exiting operations upon BIND */
1408                 connection_abandon( conn );
1409         }
1410
1411         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1412
1413         op->o_conn = conn;
1414         op->vrFilter = NULL;
1415         op->o_pagedresults_state = conn->c_pagedresults_state;
1416 #ifdef LDAP_CONNECTIONLESS
1417         op->o_peeraddr = peeraddr;
1418         if (cdn ) {
1419             ber_str2bv( cdn, 0, 1, &op->o_dn );
1420             op->o_protocol = LDAP_VERSION2;
1421         }
1422 #endif
1423
1424         if ( conn->c_conn_state == SLAP_C_BINDING
1425                 || conn->c_conn_state == SLAP_C_CLOSING )
1426         {
1427 #ifdef NEW_LOGGING
1428                 LDAP_LOG( CONNECTION, INFO,
1429                         "connection_input: conn %lu  deferring operation\n",
1430                         conn->c_connid, 0, 0 );
1431 #else
1432                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1433 #endif
1434                 conn->c_n_ops_pending++;
1435                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1436
1437         } else {
1438                 conn->c_n_ops_executing++;
1439                 connection_op_activate( conn, op );
1440         }
1441
1442 #ifdef NO_THREADS
1443         if ( conn->c_struct_state != SLAP_C_USED ) {
1444                 /* connection must have got closed underneath us */
1445                 return 1;
1446         }
1447 #endif
1448         assert( conn->c_struct_state == SLAP_C_USED );
1449
1450         return 0;
1451 }
1452
1453 static int
1454 connection_resched( Connection *conn )
1455 {
1456         Operation *op;
1457
1458         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1459                 int rc;
1460                 ber_socket_t    sd;
1461                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1462
1463                 /* us trylock to avoid possible deadlock */
1464                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1465
1466                 if( rc ) {
1467 #ifdef NEW_LOGGING
1468                         LDAP_LOG( CONNECTION, DETAIL1,
1469                                 "connection_resched: conn %lu  reaquiring locks.\n",
1470                                 conn->c_connid, 0, 0 );
1471 #else
1472                         Debug( LDAP_DEBUG_TRACE,
1473                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1474                                 conn->c_connid, sd, 0 );
1475 #endif
1476                         /*
1477                          * reaquire locks in the right order...
1478                          * this may allow another thread to close this connection,
1479                          * so recheck state below.
1480                          */
1481                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1482                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1483                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1484                 }
1485
1486                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1487 #ifdef NEW_LOGGING
1488                         LDAP_LOG( CONNECTION, INFO,
1489                                 "connection_resched: conn %lu  closed by other thread.\n",
1490                                 conn->c_connid, 0, 0 );
1491 #else
1492                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1493                                 "closed by other thread conn=%lu sd=%d\n",
1494                                 conn->c_connid, sd, 0 );
1495 #endif
1496                 } else {
1497 #ifdef NEW_LOGGING
1498                         LDAP_LOG( CONNECTION, DETAIL1,
1499                                 "connection_resched: conn %lu  attempting closing.\n",
1500                                 conn->c_connid, 0, 0 );
1501 #else
1502                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1503                                 "attempting closing conn=%lu sd=%d\n",
1504                                 conn->c_connid, sd, 0 );
1505 #endif
1506                         connection_close( conn );
1507                 }
1508
1509                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1510                 return 0;
1511         }
1512
1513         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1514                 /* other states need different handling */
1515                 return 0;
1516         }
1517
1518         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1519                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1520                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1521                 /* pending operations should not be marked for abandonment */
1522                 assert(!op->o_abandon);
1523
1524                 conn->c_n_ops_pending--;
1525                 conn->c_n_ops_executing++;
1526
1527                 connection_op_activate( conn, op );
1528
1529                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1530                         break;
1531                 }
1532         }
1533         return 0;
1534 }
1535
1536 static int connection_op_activate( Connection *conn, Operation *op )
1537 {
1538         struct co_arg *arg;
1539         int status;
1540         ber_tag_t tag = op->o_tag;
1541
1542         if(tag == LDAP_REQ_BIND) {
1543                 conn->c_conn_state = SLAP_C_BINDING;
1544         }
1545
1546         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1547         arg->co_conn = conn;
1548         arg->co_op = op;
1549
1550         if (!arg->co_op->o_dn.bv_len) {
1551             arg->co_op->o_authz = conn->c_authz;
1552             arg->co_op->o_dn.bv_val = ch_strdup( conn->c_dn.bv_val ?
1553                 conn->c_dn.bv_val : "" );
1554             arg->co_op->o_ndn.bv_val = ch_strdup( conn->c_ndn.bv_val ?
1555                 conn->c_ndn.bv_val : "" );
1556         }
1557         arg->co_op->o_authtype = conn->c_authtype;
1558         ber_dupbv( &arg->co_op->o_authmech, &conn->c_authmech );
1559
1560         if (!arg->co_op->o_protocol) {
1561             arg->co_op->o_protocol = conn->c_protocol
1562                 ? conn->c_protocol : LDAP_VERSION3;
1563         }
1564         arg->co_op->o_connid = conn->c_connid;
1565
1566         LDAP_STAILQ_INSERT_TAIL( &conn->c_ops, arg->co_op, o_next );
1567
1568         status = ldap_pvt_thread_pool_submit( &connection_pool,
1569                 connection_operation, (void *) arg );
1570
1571         if ( status != 0 ) {
1572 #ifdef NEW_LOGGING
1573                 LDAP_LOG( CONNECTION, ERR,
1574                         "connection_op_activate: conn %lu        thread pool submit failed.\n",
1575                         conn->c_connid, 0, 0 );
1576 #else
1577                 Debug( LDAP_DEBUG_ANY,
1578                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1579 #endif
1580                 /* should move op to pending list */
1581         }
1582
1583         return status;
1584 }
1585
1586 int connection_write(ber_socket_t s)
1587 {
1588         Connection *c;
1589
1590         assert( connections != NULL );
1591
1592         ldap_pvt_thread_mutex_lock( &connections_mutex );
1593
1594         c = connection_get( s );
1595
1596         slapd_clr_write( s, 0);
1597
1598         if( c == NULL ) {
1599 #ifdef NEW_LOGGING
1600                 LDAP_LOG( CONNECTION, ERR,
1601                         "connection_write: sock %ld  no connection!\n", (long)s, 0, 0);
1602 #else
1603                 Debug( LDAP_DEBUG_ANY,
1604                         "connection_write(%ld): no connection!\n",
1605                         (long) s, 0, 0 );
1606 #endif
1607                 slapd_remove(s, 0);
1608                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1609                 return -1;
1610         }
1611
1612         c->c_n_write++;
1613
1614 #ifdef NEW_LOGGING
1615         LDAP_LOG( CONNECTION, DETAIL1,
1616                 "connection_write conn %lu  waking output.\n", c->c_connid, 0, 0 );
1617 #else
1618         Debug( LDAP_DEBUG_TRACE,
1619                 "connection_write(%d): waking output for id=%lu\n",
1620                 s, c->c_connid, 0 );
1621 #endif
1622         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1623
1624         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1625                 slapd_set_read( s, 1 );
1626         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1627                 slapd_set_write( s, 1 );
1628         connection_return( c );
1629         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1630         return 0;
1631 }
1632