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_mutex_destroy( &connections[i].c_sasl_bindmutex );
 143                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 144                 }
 145         }
 146
 147         free( connections );
 148         connections = NULL;
 149
 150         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 151         return 0;
 152 }
 153
 154 /*
 155  * shutdown all connections
 156  */
 157 int connections_shutdown(void)
 158 {
 159         ber_socket_t i;
 160
 161         ldap_pvt_thread_mutex_lock( &connections_mutex );
 162
 163         for ( i = 0; i < dtblsize; i++ ) {
 164                 if( connections[i].c_struct_state != SLAP_C_USED ) {
 165                         continue;
 166                 }
 167
 168                 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 169
 170                 /* connections_mutex and c_mutex are locked */
 171                 connection_closing( &connections[i] );
 172                 connection_close( &connections[i] );
 173
 174                 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 175         }
 176
 177         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 178
 179         return 0;
 180 }
 181
 182 /*
 183  * Timeout idle connections.
 184  */
 185 int connections_timeout_idle(time_t now)
 186 {
 187         int i = 0;
 188         int connindex;
 189         Connection* c;
 190
 191         for( c = connection_first( &connindex );
 192                 c != NULL;
 193                 c = connection_next( c, &connindex ) )
 194         {
 195                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 196                         /* close it */
 197                         connection_closing( c );
 198                         connection_close( c );
 199                         i++;
 200                 }
 201         }
 202         connection_done( c );
 203
 204         return i;
 205 }
 206
 207 static Connection* connection_get( ber_socket_t s )
 208 {
 209         /* connections_mutex should be locked by caller */
 210
 211         Connection *c;
 212
 213 #ifdef NEW_LOGGING
 214         LDAP_LOG( CONNECTION, ENTRY, "connection_get: socket %ld\n", (long)s, 0, 0 );
 215 #else
 216         Debug( LDAP_DEBUG_ARGS,
 217                 "connection_get(%ld)\n",
 218                 (long) s, 0, 0 );
 219 #endif
 220
 221         assert( connections != NULL );
 222
 223         if(s == AC_SOCKET_INVALID) {
 224                 return NULL;
 225         }
 226
 227 #ifndef HAVE_WINSOCK
 228         c = &connections[s];
 229
 230         assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 231
 232 #else
 233         c = NULL;
 234         {
 235                 ber_socket_t i, sd;
 236
 237                 for(i=0; i<dtblsize; i++) {
 238                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 239                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 240                                 assert( connections[i].c_sb == 0 );
 241                                 break;
 242                         }
 243
 244                         ber_sockbuf_ctrl( connections[i].c_sb,
 245                                 LBER_SB_OPT_GET_FD, &sd );
 246
 247                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 248                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 249                                 assert( sd == AC_SOCKET_INVALID );
 250                                 continue;
 251                         }
 252
 253                         /* state can actually change from used -> unused by resched,
 254                          * so don't assert details here.
 255                          */
 256
 257                         if( sd == s ) {
 258                                 c = &connections[i];
 259                                 break;
 260                         }
 261                 }
 262         }
 263 #endif
 264
 265         if( c != NULL ) {
 266                 ber_socket_t    sd;
 267
 268                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 269
 270                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 271                 if( c->c_struct_state != SLAP_C_USED ) {
 272                         /* connection must have been closed due to resched */
 273
 274                         assert( c->c_conn_state == SLAP_C_INVALID );
 275                         assert( sd == AC_SOCKET_INVALID );
 276
 277 #ifdef NEW_LOGGING
 278                         LDAP_LOG( CONNECTION, ARGS,
 279                                 "connection_get:  connection %d not used\n", s, 0, 0 );
 280 #else
 281                         Debug( LDAP_DEBUG_TRACE,
 282                                 "connection_get(%d): connection not used\n",
 283                                 s, 0, 0 );
 284 #endif
 285
 286                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 287                         return NULL;
 288                 }
 289
 290 #ifdef NEW_LOGGING
 291                 LDAP_LOG( CONNECTION, RESULTS,
 292                         "connection_get: get for %d got connid %lu\n", s, c->c_connid, 0 );
 293 #else
 294                 Debug( LDAP_DEBUG_TRACE,
 295                         "connection_get(%d): got connid=%lu\n",
 296                         s, c->c_connid, 0 );
 297 #endif
 298
 299                 c->c_n_get++;
 300
 301                 assert( c->c_struct_state == SLAP_C_USED );
 302                 assert( c->c_conn_state != SLAP_C_INVALID );
 303                 assert( sd != AC_SOCKET_INVALID );
 304
 305 #ifdef SLAPD_MONITOR
 306                 c->c_activitytime = slap_get_time();
 307 #else
 308                 if( global_idletimeout > 0 ) {
 309                         c->c_activitytime = slap_get_time();
 310                 }
 311 #endif
 312         }
 313
 314         return c;
 315 }
 316
 317 static void connection_return( Connection *c )
 318 {
 319         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 320 }
 321
 322 long connection_init(
 323         ber_socket_t s,
 324         const char* url,
 325         const char* dnsname,
 326         const char* peername,
 327         const char* sockname,
 328         int tls_udp_option,
 329         slap_ssf_t ssf,
 330         const char *authid )
 331 {
 332         unsigned long id;
 333         Connection *c;
 334
 335         assert( connections != NULL );
 336
 337         assert( dnsname != NULL );
 338         assert( peername != NULL );
 339         assert( sockname != NULL );
 340
 341 #ifndef HAVE_TLS
 342         assert( tls_udp_option != 1 );
 343 #endif
 344
 345         if( s == AC_SOCKET_INVALID ) {
 346 #ifdef NEW_LOGGING
 347                 LDAP_LOG( CONNECTION, INFO,
 348                            "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 349 #else
 350                 Debug( LDAP_DEBUG_ANY,
 351                        "connection_init(%ld): invalid.\n",
 352                        (long) s, 0, 0 );
 353 #endif
 354                 return -1;
 355         }
 356
 357         assert( s >= 0 );
 358 #ifndef HAVE_WINSOCK
 359         assert( s < dtblsize );
 360 #endif
 361
 362         ldap_pvt_thread_mutex_lock( &connections_mutex );
 363
 364 #ifndef HAVE_WINSOCK
 365         c = &connections[s];
 366
 367 #else
 368         {
 369                 ber_socket_t    i;
 370
 371                 c = NULL;
 372
 373         for( i=0; i < dtblsize; i++) {
 374                 ber_socket_t    sd;
 375
 376             if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 377                 assert( connections[i].c_sb == 0 );
 378                 c = &connections[i];
 379                 break;
 380             }
 381
 382                         sd = AC_SOCKET_INVALID;
 383                         if (connections[i].c_sb != NULL)
 384                         ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd );
 385
 386             if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 387                 assert( sd == AC_SOCKET_INVALID );
 388                 c = &connections[i];
 389                 break;
 390             }
 391
 392             assert( connections[i].c_struct_state == SLAP_C_USED );
 393             assert( connections[i].c_conn_state != SLAP_C_INVALID );
 394             assert( sd != AC_SOCKET_INVALID );
 395         }
 396
 397         if( c == NULL ) {
 398 #ifdef NEW_LOGGING
 399                 LDAP_LOG( CONNECTION, INFO,
 400                            "connection_init: skt %d      connection table full (%d/%d)\n",
 401                            s, i, dtblsize );
 402 #else
 403                 Debug( LDAP_DEBUG_ANY,
 404                                 "connection_init(%d): connection table full (%d/%d)\n",
 405                                 s, i, dtblsize);
 406 #endif
 407             ldap_pvt_thread_mutex_unlock( &connections_mutex );
 408             return -1;
 409         }
 410     }
 411 #endif
 412
 413     assert( c != NULL );
 414
 415         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 416                 c->c_authmech.bv_val = NULL;
 417                 c->c_authmech.bv_len = 0;
 418                 c->c_dn.bv_val = NULL;
 419                 c->c_dn.bv_len = 0;
 420                 c->c_ndn.bv_val = NULL;
 421                 c->c_ndn.bv_len = 0;
 422                 c->c_groups = NULL;
 423
 424                 c->c_listener_url.bv_val = NULL;
 425                 c->c_listener_url.bv_len = 0;
 426                 c->c_peer_domain.bv_val = NULL;
 427                 c->c_peer_domain.bv_len = 0;
 428                 c->c_peer_name.bv_val = NULL;
 429                 c->c_peer_name.bv_len = 0;
 430                 c->c_sock_name.bv_val = NULL;
 431                 c->c_sock_name.bv_len = 0;
 432
 433                 LDAP_STAILQ_INIT(&c->c_ops);
 434                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 435
 436                 c->c_sasl_bind_mech.bv_val = NULL;
 437                 c->c_sasl_bind_mech.bv_len = 0;
 438                 c->c_sasl_context = NULL;
 439                 c->c_sasl_extra = NULL;
 440                 c->c_sasl_bindop = NULL;
 441
 442                 c->c_sb = ber_sockbuf_alloc( );
 443
 444                 {
 445                         ber_len_t max = sockbuf_max_incoming;
 446                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 447                 }
 448
 449                 c->c_currentber = NULL;
 450
 451                 /* should check status of thread calls */
 452                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 453                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 454                 ldap_pvt_thread_mutex_init( &c->c_sasl_bindmutex );
 455                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 456
 457                 c->c_struct_state = SLAP_C_UNUSED;
 458         }
 459
 460     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 461
 462     assert( c->c_struct_state == SLAP_C_UNUSED );
 463     assert( c->c_authmech.bv_val == NULL );
 464     assert( c->c_dn.bv_val == NULL );
 465     assert( c->c_ndn.bv_val == NULL );
 466     assert( c->c_groups == NULL );
 467     assert( c->c_listener_url.bv_val == NULL );
 468     assert( c->c_peer_domain.bv_val == NULL );
 469     assert( c->c_peer_name.bv_val == NULL );
 470     assert( c->c_sock_name.bv_val == NULL );
 471     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 472     assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 473         assert( c->c_sasl_bind_mech.bv_val == NULL );
 474         assert( c->c_sasl_context == NULL );
 475         assert( c->c_sasl_extra == NULL );
 476         assert( c->c_sasl_bindop == NULL );
 477         assert( c->c_currentber == NULL );
 478
 479         ber_str2bv( url, 0, 1, &c->c_listener_url );
 480         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 481         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 482         ber_str2bv( sockname, 0, 1, &c->c_sock_name );
 483
 484     c->c_n_ops_received = 0;
 485     c->c_n_ops_executing = 0;
 486     c->c_n_ops_pending = 0;
 487     c->c_n_ops_completed = 0;
 488
 489         c->c_n_get = 0;
 490         c->c_n_read = 0;
 491         c->c_n_write = 0;
 492
 493         /* set to zero until bind, implies LDAP_VERSION3 */
 494         c->c_protocol = 0;
 495
 496 #ifdef SLAPD_MONITOR
 497         c->c_activitytime = c->c_starttime = slap_get_time();
 498 #else
 499         if( global_idletimeout > 0 ) {
 500                 c->c_activitytime = c->c_starttime = slap_get_time();
 501         }
 502 #endif
 503
 504 #ifdef LDAP_CONNECTIONLESS
 505         c->c_is_udp = 0;
 506         if (tls_udp_option == 2)
 507         {
 508                 c->c_is_udp = 1;
 509 #ifdef LDAP_DEBUG
 510         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 511                 LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 512 #endif
 513         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 514                 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 515         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 516                 LBER_SBIOD_LEVEL_PROVIDER, NULL );
 517         } else
 518 #endif
 519         {
 520 #ifdef LDAP_DEBUG
 521         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 522                 LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 523 #endif
 524         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 525                 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 526         }
 527
 528 #ifdef LDAP_DEBUG
 529         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 530                 INT_MAX, (void*)"ldap_" );
 531 #endif
 532
 533         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 534                 c /* non-NULL */ ) < 0 )
 535         {
 536 #ifdef NEW_LOGGING
 537                 LDAP_LOG( CONNECTION, INFO,
 538                            "connection_init: conn %lu  set nonblocking failed\n",
 539                            c->c_connid, 0, 0 );
 540 #else
 541                 Debug( LDAP_DEBUG_ANY,
 542                         "connection_init(%d, %s): set nonblocking failed\n",
 543                         s, c->c_peer_name.bv_val, 0 );
 544 #endif
 545         }
 546
 547     id = c->c_connid = conn_nextid++;
 548
 549     c->c_conn_state = SLAP_C_INACTIVE;
 550     c->c_struct_state = SLAP_C_USED;
 551
 552         c->c_ssf = c->c_transport_ssf = ssf;
 553         c->c_tls_ssf = 0;
 554
 555 #ifdef HAVE_TLS
 556     if ( tls_udp_option == 1 ) {
 557             c->c_is_tls = 1;
 558             c->c_needs_tls_accept = 1;
 559     } else {
 560             c->c_is_tls = 0;
 561             c->c_needs_tls_accept = 0;
 562     }
 563 #endif
 564
 565         slap_sasl_open( c );
 566         slap_sasl_external( c, ssf, authid );
 567
 568     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 569     ldap_pvt_thread_mutex_unlock( &connections_mutex );
 570
 571     backend_connection_init(c);
 572
 573     return id;
 574 }
 575
 576 void connection2anonymous( Connection *c )
 577 {
 578         assert( connections != NULL );
 579         assert( c != NULL );
 580
 581         {
 582                 ber_len_t max = sockbuf_max_incoming;
 583                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 584         }
 585
 586         if(c->c_authmech.bv_val != NULL ) {
 587                 free(c->c_authmech.bv_val);
 588                 c->c_authmech.bv_val = NULL;
 589         }
 590         c->c_authmech.bv_len = 0;
 591
 592         if(c->c_dn.bv_val != NULL) {
 593                 free(c->c_dn.bv_val);
 594                 c->c_dn.bv_val = NULL;
 595         }
 596         c->c_dn.bv_len = 0;
 597         if(c->c_ndn.bv_val != NULL) {
 598                 free(c->c_ndn.bv_val);
 599                 c->c_ndn.bv_val = NULL;
 600         }
 601         c->c_ndn.bv_len = 0;
 602
 603         c->c_authz_backend = NULL;
 604
 605         {
 606                 GroupAssertion *g, *n;
 607                 for (g = c->c_groups; g; g=n) {
 608                         n = g->ga_next;
 609                         free(g);
 610                 }
 611                 c->c_groups = NULL;
 612         }
 613 }
 614
 615 static void
 616 connection_destroy( Connection *c )
 617 {
 618         /* note: connections_mutex should be locked by caller */
 619     ber_socket_t        sd;
 620     unsigned long       connid;
 621
 622     assert( connections != NULL );
 623     assert( c != NULL );
 624     assert( c->c_struct_state != SLAP_C_UNUSED );
 625     assert( c->c_conn_state != SLAP_C_INVALID );
 626     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 627
 628     /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 629     connid = c->c_connid;
 630
 631     backend_connection_destroy(c);
 632
 633     c->c_protocol = 0;
 634     c->c_connid = -1;
 635
 636     c->c_activitytime = c->c_starttime = 0;
 637
 638         connection2anonymous( c );
 639
 640         if(c->c_listener_url.bv_val != NULL) {
 641                 free(c->c_listener_url.bv_val);
 642                 c->c_listener_url.bv_val = NULL;
 643         }
 644         c->c_listener_url.bv_len = 0;
 645
 646         if(c->c_peer_domain.bv_val != NULL) {
 647                 free(c->c_peer_domain.bv_val);
 648                 c->c_peer_domain.bv_val = NULL;
 649         }
 650         c->c_peer_domain.bv_len = 0;
 651         if(c->c_peer_name.bv_val != NULL) {
 652 #ifdef LDAP_PF_LOCAL
 653                 /*
 654                  * If peer was a domain socket, unlink. Mind you,
 655                  * they may be un-named. Should we leave this to
 656                  * the client?
 657                  */
 658                 if (strncmp(c->c_peer_name.bv_val, "PATH=",
 659                                         sizeof("PATH=") - 1) == 0) {
 660                         char *path = c->c_peer_name.bv_val
 661                                 + sizeof("PATH=") - 1;
 662                         if (path[0] != '\0') {
 663                                 (void)unlink(path);
 664                         }
 665                 }
 666 #endif /* LDAP_PF_LOCAL */
 667
 668                 free(c->c_peer_name.bv_val);
 669                 c->c_peer_name.bv_val = NULL;
 670         }
 671         c->c_peer_name.bv_len = 0;
 672         if(c->c_sock_name.bv_val != NULL) {
 673                 free(c->c_sock_name.bv_val);
 674                 c->c_sock_name.bv_val = NULL;
 675         }
 676         c->c_sock_name.bv_len = 0;
 677
 678         c->c_sasl_bind_in_progress = 0;
 679         if(c->c_sasl_bind_mech.bv_val != NULL) {
 680                 free(c->c_sasl_bind_mech.bv_val);
 681                 c->c_sasl_bind_mech.bv_val = NULL;
 682         }
 683         c->c_sasl_bind_mech.bv_len = 0;
 684
 685         slap_sasl_close( c );
 686
 687         if ( c->c_currentber != NULL ) {
 688                 ber_free( c->c_currentber, 1 );
 689                 c->c_currentber = NULL;
 690         }
 691
 692         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 693         if ( sd != AC_SOCKET_INVALID ) {
 694                 slapd_remove( sd, 0 );
 695
 696                 Statslog( LDAP_DEBUG_STATS,
 697                     "conn=%lu fd=%d closed\n",
 698                         connid, sd, 0, 0, 0 );
 699         }
 700
 701         ber_sockbuf_free( c->c_sb );
 702
 703         c->c_sb = ber_sockbuf_alloc( );
 704
 705         {
 706                 ber_len_t max = sockbuf_max_incoming;
 707                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 708         }
 709
 710     c->c_conn_state = SLAP_C_INVALID;
 711     c->c_struct_state = SLAP_C_UNUSED;
 712 }
 713
 714 int connection_state_closing( Connection *c )
 715 {
 716         /* c_mutex must be locked by caller */
 717
 718         int state;
 719         assert( c != NULL );
 720         assert( c->c_struct_state == SLAP_C_USED );
 721
 722         state = c->c_conn_state;
 723
 724         assert( state != SLAP_C_INVALID );
 725
 726         return state == SLAP_C_CLOSING;
 727 }
 728
 729 static void connection_abandon( Connection *c )
 730 {
 731         /* c_mutex must be locked by caller */
 732
 733         Operation *o;
 734
 735         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
 736                 o->o_abandon = 1;
 737         }
 738
 739         /* remove pending operations */
 740         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 741                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 742                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 743                 slap_op_free( o );
 744         }
 745 }
 746
 747 void connection_closing( Connection *c )
 748 {
 749         assert( connections != NULL );
 750         assert( c != NULL );
 751         assert( c->c_struct_state == SLAP_C_USED );
 752         assert( c->c_conn_state != SLAP_C_INVALID );
 753
 754         /* c_mutex must be locked by caller */
 755
 756         if( c->c_conn_state != SLAP_C_CLOSING ) {
 757                 ber_socket_t    sd;
 758
 759                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 760 #ifdef NEW_LOGGING
 761                 LDAP_LOG( CONNECTION, DETAIL1,
 762                            "connection_closing: conn %lu readying socket %d for close.\n",
 763                            c->c_connid, sd, 0 );
 764 #else
 765                 Debug( LDAP_DEBUG_TRACE,
 766                         "connection_closing: readying conn=%lu sd=%d for close\n",
 767                         c->c_connid, sd, 0 );
 768 #endif
 769                 /* update state to closing */
 770                 c->c_conn_state = SLAP_C_CLOSING;
 771
 772                 /* don't listen on this port anymore */
 773                 slapd_clr_read( sd, 1 );
 774
 775                 /* abandon active operations */
 776                 connection_abandon( c );
 777
 778                 /* wake write blocked operations */
 779                 slapd_clr_write( sd, 1 );
 780                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 781         }
 782 }
 783
 784 static void connection_close( Connection *c )
 785 {
 786         ber_socket_t    sd;
 787
 788         assert( connections != NULL );
 789         assert( c != NULL );
 790         assert( c->c_struct_state == SLAP_C_USED );
 791         assert( c->c_conn_state == SLAP_C_CLOSING );
 792
 793         /* note: connections_mutex and c_mutex should be locked by caller */
 794
 795         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 796         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 797 #ifdef NEW_LOGGING
 798                 LDAP_LOG( CONNECTION, DETAIL1,
 799                            "connection_close: conn %lu  deferring sd %d\n",
 800                            c->c_connid, sd, 0 );
 801 #else
 802                 Debug( LDAP_DEBUG_TRACE,
 803                         "connection_close: deferring conn=%lu sd=%d\n",
 804                         c->c_connid, sd, 0 );
 805 #endif
 806                 return;
 807         }
 808
 809 #ifdef NEW_LOGGING
 810         LDAP_LOG( CONNECTION, RESULTS,
 811                    "connection_close: conn %lu  sd %d\n", c->c_connid, sd, 0 );
 812 #else
 813         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 814                 c->c_connid, sd, 0 );
 815 #endif
 816         connection_destroy( c );
 817 }
 818
 819 unsigned long connections_nextid(void)
 820 {
 821         unsigned long id;
 822         assert( connections != NULL );
 823
 824         ldap_pvt_thread_mutex_lock( &connections_mutex );
 825
 826         id = conn_nextid;
 827
 828         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 829
 830         return id;
 831 }
 832
 833 Connection* connection_first( ber_socket_t *index )
 834 {
 835         assert( connections != NULL );
 836         assert( index != NULL );
 837
 838         ldap_pvt_thread_mutex_lock( &connections_mutex );
 839
 840         *index = 0;
 841
 842         return connection_next(NULL, index);
 843 }
 844
 845 Connection* connection_next( Connection *c, ber_socket_t *index )
 846 {
 847         assert( connections != NULL );
 848         assert( index != NULL );
 849         assert( *index <= dtblsize );
 850
 851         if( c != NULL ) {
 852                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 853         }
 854
 855         c = NULL;
 856
 857         for(; *index < dtblsize; (*index)++) {
 858                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 859                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 860 #ifndef HAVE_WINSOCK
 861                         continue;
 862 #else
 863                         break;
 864 #endif
 865                 }
 866
 867                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 868                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 869                         c = &connections[(*index)++];
 870                         break;
 871                 }
 872
 873                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 874                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 875         }
 876
 877         if( c != NULL ) {
 878                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 879         }
 880
 881         return c;
 882 }
 883
 884 void connection_done( Connection *c )
 885 {
 886         assert( connections != NULL );
 887
 888         if( c != NULL ) {
 889                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 890         }
 891
 892         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 893 }
 894
 895 /*
 896  * connection_activity - handle the request operation op on connection
 897  * conn.  This routine figures out what kind of operation it is and
 898  * calls the appropriate stub to handle it.
 899  */
 900
 901 #ifdef SLAPD_MONITOR
 902 #define INCR_OP(var,index) \
 903         do { \
 904                 ldap_pvt_thread_mutex_lock( &num_ops_mutex ); \
 905                 (var)[(index)]++; \
 906                 ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); \
 907         } while (0)
 908 #else /* !SLAPD_MONITOR */
 909 #define INCR_OP(var,index)
 910 #endif /* !SLAPD_MONITOR */
 911
 912 static void *
 913 connection_operation( void *ctx, void *arg_v )
 914 {
 915         int rc;
 916         struct co_arg   *arg = arg_v;
 917         ber_tag_t tag = arg->co_op->o_tag;
 918 #ifdef SLAPD_MONITOR
 919         ber_tag_t oldtag = tag;
 920 #endif /* SLAPD_MONITOR */
 921         Connection *conn = arg->co_conn;
 922
 923         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 924         num_ops_initiated++;
 925         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 926
 927         arg->co_op->o_threadctx = ctx;
 928
 929         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 930 #ifdef NEW_LOGGING
 931                 LDAP_LOG( CONNECTION, ERR,
 932                         "connection_operation: conn %lu SASL bind in progress (tag=%ld).\n",
 933                         conn->c_connid, (long)tag, 0 );
 934 #else
 935                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 936                         "error: SASL bind in progress (tag=%ld).\n",
 937                         (long) tag, 0, 0 );
 938 #endif
 939                 send_ldap_result( conn, arg->co_op,
 940                         rc = LDAP_OPERATIONS_ERROR,
 941                         NULL, "SASL bind in progress", NULL, NULL );
 942                 goto operations_error;
 943         }
 944
 945         switch ( tag ) {
 946         case LDAP_REQ_BIND:
 947                 INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
 948                 rc = do_bind( conn, arg->co_op );
 949                 break;
 950
 951         case LDAP_REQ_UNBIND:
 952                 INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
 953                 rc = do_unbind( conn, arg->co_op );
 954                 break;
 955
 956         case LDAP_REQ_ADD:
 957                 INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
 958                 rc = do_add( conn, arg->co_op );
 959                 break;
 960
 961         case LDAP_REQ_DELETE:
 962                 INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
 963                 rc = do_delete( conn, arg->co_op );
 964                 break;
 965
 966         case LDAP_REQ_MODRDN:
 967                 INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
 968                 rc = do_modrdn( conn, arg->co_op );
 969                 break;
 970
 971         case LDAP_REQ_MODIFY:
 972                 INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
 973                 rc = do_modify( conn, arg->co_op );
 974                 break;
 975
 976         case LDAP_REQ_COMPARE:
 977                 INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
 978                 rc = do_compare( conn, arg->co_op );
 979                 break;
 980
 981         case LDAP_REQ_SEARCH:
 982                 INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
 983                 rc = do_search( conn, arg->co_op );
 984                 break;
 985
 986         case LDAP_REQ_ABANDON:
 987                 INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
 988                 rc = do_abandon( conn, arg->co_op );
 989                 break;
 990
 991         case LDAP_REQ_EXTENDED:
 992                 INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
 993                 rc = do_extended( conn, arg->co_op );
 994                 break;
 995
 996         default:
 997 #ifdef NEW_LOGGING
 998                 LDAP_LOG( CONNECTION, INFO,
 999                            "connection_operation: conn %lu  unknown LDAP request 0x%lx\n",
1000                            conn->c_connid, tag, 0  );
1001 #else
1002                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
1003                     tag, 0, 0 );
1004 #endif
1005                 arg->co_op->o_tag = LBER_ERROR;
1006                 send_ldap_disconnect( conn, arg->co_op,
1007                         LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
1008                 rc = -1;
1009                 break;
1010         }
1011
1012 #ifdef SLAPD_MONITOR
1013         oldtag = tag;
1014 #endif /* SLAPD_MONITOR */
1015         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
1016
1017 operations_error:
1018         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
1019         num_ops_completed++;
1020 #ifdef SLAPD_MONITOR
1021         switch (oldtag) {
1022         case LDAP_REQ_BIND:
1023                 num_ops_completed_[SLAP_OP_BIND]++;
1024                 break;
1025         case LDAP_REQ_UNBIND:
1026                 num_ops_completed_[SLAP_OP_UNBIND]++;
1027                 break;
1028         case LDAP_REQ_ADD:
1029                 num_ops_completed_[SLAP_OP_ADD]++;
1030                 break;
1031         case LDAP_REQ_DELETE:
1032                 num_ops_completed_[SLAP_OP_DELETE]++;
1033                 break;
1034         case LDAP_REQ_MODRDN:
1035                 num_ops_completed_[SLAP_OP_MODRDN]++;
1036                 break;
1037         case LDAP_REQ_MODIFY:
1038                 num_ops_completed_[SLAP_OP_MODIFY]++;
1039                 break;
1040         case LDAP_REQ_COMPARE:
1041                 num_ops_completed_[SLAP_OP_COMPARE]++;
1042                 break;
1043         case LDAP_REQ_SEARCH:
1044                 num_ops_completed_[SLAP_OP_SEARCH]++;
1045                 break;
1046         case LDAP_REQ_ABANDON:
1047                 num_ops_completed_[SLAP_OP_ABANDON]++;
1048                 break;
1049         case LDAP_REQ_EXTENDED:
1050                 num_ops_completed_[SLAP_OP_EXTENDED]++;
1051                 break;
1052         }
1053 #endif /* SLAPD_MONITOR */
1054         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1055
1056         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1057
1058         conn->c_n_ops_executing--;
1059         conn->c_n_ops_completed++;
1060
1061         LDAP_STAILQ_REMOVE( &conn->c_ops, arg->co_op, slap_op, o_next);
1062         LDAP_STAILQ_NEXT(arg->co_op, o_next) = NULL;
1063         slap_op_free( arg->co_op );
1064         arg->co_op = NULL;
1065         arg->co_conn = NULL;
1066         free( (char *) arg );
1067         arg = NULL;
1068
1069         switch( tag ) {
1070         case LBER_ERROR:
1071         case LDAP_REQ_UNBIND:
1072                 /* c_mutex is locked */
1073                 connection_closing( conn );
1074                 break;
1075
1076         case LDAP_REQ_BIND:
1077                 conn->c_sasl_bind_in_progress =
1078                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1079
1080                 if( conn->c_conn_state == SLAP_C_BINDING) {
1081                         conn->c_conn_state = SLAP_C_ACTIVE;
1082                 }
1083         }
1084
1085         connection_resched( conn );
1086
1087         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1088
1089         return NULL;
1090 }
1091
1092 int connection_read(ber_socket_t s)
1093 {
1094         int rc = 0;
1095         Connection *c;
1096
1097         assert( connections != NULL );
1098
1099         ldap_pvt_thread_mutex_lock( &connections_mutex );
1100
1101         /* get (locked) connection */
1102         c = connection_get( s );
1103
1104         if( c == NULL ) {
1105 #ifdef NEW_LOGGING
1106                 LDAP_LOG( CONNECTION, INFO,
1107                         "connection_read: sock %ld no connection\n", (long)s, 0, 0 );
1108 #else
1109                 Debug( LDAP_DEBUG_ANY,
1110                         "connection_read(%ld): no connection!\n",
1111                         (long) s, 0, 0 );
1112 #endif
1113                 slapd_remove(s, 0);
1114
1115                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1116                 return -1;
1117         }
1118
1119         c->c_n_read++;
1120
1121         if( c->c_conn_state == SLAP_C_CLOSING ) {
1122 #ifdef NEW_LOGGING
1123                 LDAP_LOG( CONNECTION, INFO,
1124                         "connection_read: conn %lu connection closing, ignoring input\n",
1125                         c->c_connid, 0, 0 );
1126 #else
1127                 Debug( LDAP_DEBUG_TRACE,
1128                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1129                         s, c->c_connid, 0 );
1130 #endif
1131                 connection_return( c );
1132                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1133                 return 0;
1134         }
1135
1136 #ifdef NEW_LOGGING
1137         LDAP_LOG( CONNECTION, DETAIL1,
1138                    "connection_read: conn %lu  checking for input.\n",
1139                    c->c_connid, 0, 0  );
1140 #else
1141         Debug( LDAP_DEBUG_TRACE,
1142                 "connection_read(%d): checking for input on id=%lu\n",
1143                 s, c->c_connid, 0 );
1144 #endif
1145
1146 #ifdef HAVE_TLS
1147         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1148                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1149                 if ( rc < 0 ) {
1150 #if 0 /* required by next #if 0 */
1151                         struct timeval tv;
1152                         fd_set rfd;
1153 #endif
1154
1155 #ifdef NEW_LOGGING
1156                         LDAP_LOG( CONNECTION, ERR,
1157                                    "connection_read: conn %lu  TLS accept error, error %d\n",
1158                                    c->c_connid, rc, 0 );
1159 #else
1160                         Debug( LDAP_DEBUG_TRACE,
1161                                 "connection_read(%d): TLS accept error "
1162                                 "error=%d id=%lu, closing\n",
1163                                 s, rc, c->c_connid );
1164 #endif
1165                         c->c_needs_tls_accept = 0;
1166                         /* connections_mutex and c_mutex are locked */
1167                         connection_closing( c );
1168
1169 #if 0
1170                         /* Drain input before close, to allow SSL error codes
1171                          * to propagate to client. */
1172                         FD_ZERO(&rfd);
1173                         FD_SET(s, &rfd);
1174                         for (rc=1; rc>0;) {
1175                             tv.tv_sec = 1;
1176                             tv.tv_usec = 0;
1177                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1178                             if (rc == 1) {
1179                                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL);
1180                                 }
1181                         }
1182 #endif
1183                         connection_close( c );
1184
1185                 } else if ( rc == 0 ) {
1186                         void *ssl;
1187                         struct berval authid = { 0, NULL };
1188
1189                         c->c_needs_tls_accept = 0;
1190
1191                         /* we need to let SASL know */
1192                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1193
1194                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1195                         if( c->c_tls_ssf > c->c_ssf ) {
1196                                 c->c_ssf = c->c_tls_ssf;
1197                         }
1198
1199                         rc = dnX509peerNormalize( ssl, &authid );
1200                         if ( rc != LDAP_SUCCESS ) {
1201 #ifdef NEW_LOGGING
1202                                 LDAP_LOG( CONNECTION, INFO,
1203                                         "connection_read: conn %lu unable to get TLS client DN, "
1204                                         "error %d\n", c->c_connid, rc, 0 );
1205 #else
1206                                 Debug( LDAP_DEBUG_TRACE,
1207                                 "connection_read(%d): unable to get TLS client DN "
1208                                 "error=%d id=%lu\n",
1209                                 s, rc, c->c_connid );
1210 #endif
1211                         }
1212                         slap_sasl_external( c, c->c_tls_ssf, authid.bv_val );
1213                         if ( authid.bv_val )    free( authid.bv_val );
1214                 }
1215
1216                 /* if success and data is ready, fall thru to data input loop */
1217                 if( rc != 0 ||
1218                         !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1219                 {
1220                         connection_return( c );
1221                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1222                         return 0;
1223                 }
1224         }
1225 #endif
1226
1227 #ifdef HAVE_CYRUS_SASL
1228         if ( c->c_sasl_layers ) {
1229                 c->c_sasl_layers = 0;
1230
1231                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
1232
1233                 if( rc != LDAP_SUCCESS ) {
1234 #ifdef NEW_LOGGING
1235                         LDAP_LOG( CONNECTION, ERR,
1236                                 "connection_read: conn %lu SASL install error %d, closing\n",
1237                                 c->c_connid, rc, 0 );
1238 #else
1239                         Debug( LDAP_DEBUG_TRACE,
1240                                 "connection_read(%d): SASL install error "
1241                                 "error=%d id=%lu, closing\n",
1242                                 s, rc, c->c_connid );
1243 #endif
1244                         /* connections_mutex and c_mutex are locked */
1245                         connection_closing( c );
1246                         connection_close( c );
1247                         connection_return( c );
1248                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1249                         return 0;
1250                 }
1251         }
1252 #endif
1253
1254 #define CONNECTION_INPUT_LOOP 1
1255
1256 #ifdef DATA_READY_LOOP
1257         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
1258 #elif CONNECTION_INPUT_LOOP
1259         while(!rc)
1260 #endif
1261         {
1262                 /* How do we do this without getting into a busy loop ? */
1263                 rc = connection_input( c );
1264         }
1265
1266         if( rc < 0 ) {
1267 #ifdef NEW_LOGGING
1268                 LDAP_LOG( CONNECTION, ERR,
1269                         "connection_read: conn %lu  input error %d, closing.\n",
1270                         c->c_connid, rc, 0 );
1271 #else
1272                 Debug( LDAP_DEBUG_TRACE,
1273                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1274                         s, rc, c->c_connid );
1275 #endif
1276                 /* connections_mutex and c_mutex are locked */
1277                 connection_closing( c );
1278                 connection_close( c );
1279                 connection_return( c );
1280                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1281                 return 0;
1282         }
1283
1284         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1285                 slapd_set_read( s, 1 );
1286         }
1287
1288         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1289                 slapd_set_write( s, 1 );
1290         }
1291
1292         connection_return( c );
1293         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1294         return 0;
1295 }
1296
1297 static int
1298 connection_input(
1299     Connection *conn
1300 )
1301 {
1302         Operation *op;
1303         ber_tag_t       tag;
1304         ber_len_t       len;
1305         ber_int_t       msgid;
1306         BerElement      *ber;
1307 #ifdef LDAP_CONNECTIONLESS
1308         Sockaddr        peeraddr;
1309         char            *cdn = NULL;
1310 #endif
1311
1312         if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
1313             == NULL ) {
1314 #ifdef NEW_LOGGING
1315                 LDAP_LOG( CONNECTION, ERR,
1316                         "connection_input: conn %lu  ber_alloc failed.\n",
1317                         conn->c_connid, 0, 0 );
1318 #else
1319                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1320 #endif
1321                 return -1;
1322         }
1323
1324         errno = 0;
1325
1326 #ifdef LDAP_CONNECTIONLESS
1327         if (conn->c_is_udp)
1328         {
1329                 char    peername[sizeof("IP=255.255.255.255:65336")];
1330                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1331                         sizeof(struct sockaddr));
1332                 if (len != sizeof(struct sockaddr))
1333                         return 1;
1334                 sprintf( peername, "IP=%s:%d",
1335                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1336                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1337                 Statslog( LDAP_DEBUG_STATS,
1338                         "conn=%lu UDP request from %s (%s) accepted.\n",
1339                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1340         }
1341 #endif
1342         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1343         if ( tag != LDAP_TAG_MESSAGE ) {
1344                 int err = errno;
1345                 ber_socket_t    sd;
1346
1347                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1348
1349 #ifdef NEW_LOGGING
1350                 LDAP_LOG( CONNECTION, ERR,
1351                         "connection_input: conn %lu  ber_get_next failed, errno %d (%s).\n",
1352                         conn->c_connid, err, sock_errstr(err) );
1353 #else
1354                 Debug( LDAP_DEBUG_TRACE,
1355                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1356                         sd, err, sock_errstr(err) );
1357 #endif
1358                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1359                         /* log, close and send error */
1360                         ber_free( conn->c_currentber, 1 );
1361                         conn->c_currentber = NULL;
1362
1363                         return -2;
1364                 }
1365                 return 1;
1366         }
1367
1368         ber = conn->c_currentber;
1369         conn->c_currentber = NULL;
1370
1371         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1372                 /* log, close and send error */
1373 #ifdef NEW_LOGGING
1374                 LDAP_LOG( CONNECTION, ERR,
1375                         "connection_input: conn %lu  ber_get_int returns 0x%lx.\n",
1376                         conn->c_connid, tag, 0 );
1377 #else
1378                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1379                     0 );
1380 #endif
1381                 ber_free( ber, 1 );
1382                 return -1;
1383         }
1384
1385         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1386                 /* log, close and send error */
1387 #ifdef NEW_LOGGING
1388                 LDAP_LOG( CONNECTION, ERR,
1389                            "connection_input: conn %lu  ber_peek_tag returns 0x%lx.\n",
1390                            conn->c_connid, tag, 0 );
1391 #else
1392                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1393                     0 );
1394 #endif
1395                 ber_free( ber, 1 );
1396
1397                 return -1;
1398         }
1399
1400 #ifdef LDAP_CONNECTIONLESS
1401         if (conn->c_is_udp) {
1402                 if (tag == LBER_OCTETSTRING) {
1403                         ber_get_stringa( ber, &cdn );
1404                         tag = ber_peek_tag(ber, &len);
1405                 }
1406                 if (tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH) {
1407 #ifdef NEW_LOGGING
1408                     LDAP_LOG( CONNECTION, ERR,
1409                                "connection_input: conn %lu  invalid req for UDP 0x%lx.\n",
1410                                conn->c_connid, tag, 0 );
1411 #else
1412                     Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1413                         0 );
1414 #endif
1415                     ber_free( ber, 1 );
1416                     return 0;
1417                 }
1418         }
1419 #endif
1420         if(tag == LDAP_REQ_BIND) {
1421                 /* immediately abandon all exiting operations upon BIND */
1422                 connection_abandon( conn );
1423         }
1424
1425         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1426
1427         op->vrFilter = NULL;
1428
1429         op->o_pagedresults_state = conn->c_pagedresults_state;
1430
1431 #ifdef LDAP_CONNECTIONLESS
1432         op->o_peeraddr = peeraddr;
1433         if (cdn) {
1434             ber_str2bv( cdn, 0, 1, &op->o_dn );
1435             op->o_protocol = LDAP_VERSION2;
1436         }
1437 #endif
1438         if ( conn->c_conn_state == SLAP_C_BINDING
1439                 || conn->c_conn_state == SLAP_C_CLOSING )
1440         {
1441 #ifdef NEW_LOGGING
1442                 LDAP_LOG( CONNECTION, INFO,
1443                         "connection_input: conn %lu  deferring operation\n",
1444                         conn->c_connid, 0, 0 );
1445 #else
1446                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1447 #endif
1448                 conn->c_n_ops_pending++;
1449                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1450
1451         } else {
1452                 conn->c_n_ops_executing++;
1453                 connection_op_activate( conn, op );
1454         }
1455
1456 #ifdef NO_THREADS
1457         if ( conn->c_struct_state != SLAP_C_USED ) {
1458                 /* connection must have got closed underneath us */
1459                 return 1;
1460         }
1461 #endif
1462         assert( conn->c_struct_state == SLAP_C_USED );
1463
1464         return 0;
1465 }
1466
1467 static int
1468 connection_resched( Connection *conn )
1469 {
1470         Operation *op;
1471
1472         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1473                 int rc;
1474                 ber_socket_t    sd;
1475                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1476
1477                 /* us trylock to avoid possible deadlock */
1478                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1479
1480                 if( rc ) {
1481 #ifdef NEW_LOGGING
1482                         LDAP_LOG( CONNECTION, DETAIL1,
1483                                 "connection_resched: conn %lu  reaquiring locks.\n",
1484                                 conn->c_connid, 0, 0 );
1485 #else
1486                         Debug( LDAP_DEBUG_TRACE,
1487                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1488                                 conn->c_connid, sd, 0 );
1489 #endif
1490                         /*
1491                          * reaquire locks in the right order...
1492                          * this may allow another thread to close this connection,
1493                          * so recheck state below.
1494                          */
1495                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1496                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1497                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1498                 }
1499
1500                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1501 #ifdef NEW_LOGGING
1502                         LDAP_LOG( CONNECTION, INFO,
1503                                 "connection_resched: conn %lu  closed by other thread.\n",
1504                                 conn->c_connid, 0, 0 );
1505 #else
1506                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1507                                 "closed by other thread conn=%lu sd=%d\n",
1508                                 conn->c_connid, sd, 0 );
1509 #endif
1510                 } else {
1511 #ifdef NEW_LOGGING
1512                         LDAP_LOG( CONNECTION, DETAIL1,
1513                                 "connection_resched: conn %lu  attempting closing.\n",
1514                                 conn->c_connid, 0, 0 );
1515 #else
1516                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1517                                 "attempting closing conn=%lu sd=%d\n",
1518                                 conn->c_connid, sd, 0 );
1519 #endif
1520                         connection_close( conn );
1521                 }
1522
1523                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1524                 return 0;
1525         }
1526
1527         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1528                 /* other states need different handling */
1529                 return 0;
1530         }
1531
1532         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1533                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1534                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1535                 /* pending operations should not be marked for abandonment */
1536                 assert(!op->o_abandon);
1537
1538                 conn->c_n_ops_pending--;
1539                 conn->c_n_ops_executing++;
1540
1541                 connection_op_activate( conn, op );
1542
1543                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1544                         break;
1545                 }
1546         }
1547         return 0;
1548 }
1549
1550 static int connection_op_activate( Connection *conn, Operation *op )
1551 {
1552         struct co_arg *arg;
1553         int status;
1554         ber_tag_t tag = op->o_tag;
1555
1556         if(tag == LDAP_REQ_BIND) {
1557                 conn->c_conn_state = SLAP_C_BINDING;
1558         }
1559
1560         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1561         arg->co_conn = conn;
1562         arg->co_op = op;
1563
1564         if (!arg->co_op->o_dn.bv_len) {
1565             arg->co_op->o_authz = conn->c_authz;
1566             arg->co_op->o_dn.bv_val = ch_strdup( conn->c_dn.bv_val ?
1567                 conn->c_dn.bv_val : "" );
1568             arg->co_op->o_ndn.bv_val = ch_strdup( conn->c_ndn.bv_val ?
1569                 conn->c_ndn.bv_val : "" );
1570         }
1571         arg->co_op->o_authtype = conn->c_authtype;
1572         ber_dupbv( &arg->co_op->o_authmech, &conn->c_authmech );
1573
1574         if (!arg->co_op->o_protocol) {
1575             arg->co_op->o_protocol = conn->c_protocol
1576                 ? conn->c_protocol : LDAP_VERSION3;
1577         }
1578         arg->co_op->o_connid = conn->c_connid;
1579
1580         LDAP_STAILQ_INSERT_TAIL( &conn->c_ops, arg->co_op, o_next );
1581
1582         status = ldap_pvt_thread_pool_submit( &connection_pool,
1583                 connection_operation, (void *) arg );
1584
1585         if ( status != 0 ) {
1586 #ifdef NEW_LOGGING
1587                 LDAP_LOG( CONNECTION, ERR,
1588                         "connection_op_activate: conn %lu        thread pool submit failed.\n",
1589                         conn->c_connid, 0, 0 );
1590 #else
1591                 Debug( LDAP_DEBUG_ANY,
1592                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1593 #endif
1594                 /* should move op to pending list */
1595         }
1596
1597         return status;
1598 }
1599
1600 int connection_write(ber_socket_t s)
1601 {
1602         Connection *c;
1603
1604         assert( connections != NULL );
1605
1606         ldap_pvt_thread_mutex_lock( &connections_mutex );
1607
1608         c = connection_get( s );
1609
1610         slapd_clr_write( s, 0);
1611
1612         if( c == NULL ) {
1613 #ifdef NEW_LOGGING
1614                 LDAP_LOG( CONNECTION, ERR,
1615                         "connection_write: sock %ld  no connection!\n", (long)s, 0, 0);
1616 #else
1617                 Debug( LDAP_DEBUG_ANY,
1618                         "connection_write(%ld): no connection!\n",
1619                         (long) s, 0, 0 );
1620 #endif
1621                 slapd_remove(s, 0);
1622                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1623                 return -1;
1624         }
1625
1626         c->c_n_write++;
1627
1628 #ifdef NEW_LOGGING
1629         LDAP_LOG( CONNECTION, DETAIL1,
1630                 "connection_write conn %lu  waking output.\n", c->c_connid, 0, 0 );
1631 #else
1632         Debug( LDAP_DEBUG_TRACE,
1633                 "connection_write(%d): waking output for id=%lu\n",
1634                 s, c->c_connid, 0 );
1635 #endif
1636         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1637
1638         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1639                 slapd_set_read( s, 1 );
1640         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1641                 slapd_set_write( s, 1 );
1642         connection_return( c );
1643         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1644         return 0;
1645 }
1646