bus/connection.c

   1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
   2 /* connection.c  Client connections
   3  *
   4  * Copyright (C) 2003  Red Hat, Inc.
   5  *
   6  * Licensed under the Academic Free License version 2.1
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  21  *
  22  */
  23
  24 #include <config.h>
  25 #include "connection.h"
  26 #include "dispatch.h"
  27 #include "policy.h"
  28 #include "services.h"
  29 #include "utils.h"
  30 #include "signals.h"
  31 #include "expirelist.h"
  32 #include "selinux.h"
  33 #include <dbus/dbus-list.h>
  34 #include <dbus/dbus-hash.h>
  35 #include <dbus/dbus-timeout.h>
  36
  37 /* Trim executed commands to this length; we want to keep logs readable */
  38 #define MAX_LOG_COMMAND_LEN 50
  39
  40 static void bus_connection_remove_transactions (DBusConnection *connection);
  41
  42 typedef struct
  43 {
  44   BusExpireItem expire_item;
  45
  46   DBusConnection *will_get_reply;
  47   DBusConnection *will_send_reply;
  48
  49   dbus_uint32_t reply_serial;
  50
  51 } BusPendingReply;
  52
  53 struct BusConnections
  54 {
  55   int refcount;
  56   DBusList *completed;  /**< List of all completed connections */
  57   int n_completed;      /**< Length of completed list */
  58   DBusList *incomplete; /**< List of all not-yet-active connections */
  59   int n_incomplete;     /**< Length of incomplete list */
  60   BusContext *context;
  61   DBusHashTable *completed_by_user; /**< Number of completed connections for each UID */
  62   DBusTimeout *expire_timeout; /**< Timeout for expiring incomplete connections. */
  63   int stamp;                   /**< Incrementing number */
  64   BusExpireList *pending_replies; /**< List of pending replies */
  65
  66 #ifdef DBUS_ENABLE_STATS
  67   int total_match_rules;
  68   int peak_match_rules;
  69   int peak_match_rules_per_conn;
  70
  71   int total_bus_names;
  72   int peak_bus_names;
  73   int peak_bus_names_per_conn;
  74 #endif
  75 };
  76
  77 static dbus_int32_t connection_data_slot = -1;
  78
  79 typedef struct
  80 {
  81   BusConnections *connections;
  82   DBusList *link_in_connection_list;
  83   DBusConnection *connection;
  84   DBusList *services_owned;
  85   int n_services_owned;
  86   DBusList *match_rules;
  87   int n_match_rules;
  88   char *name;
  89   DBusList *transaction_messages; /**< Stuff we need to send as part of a transaction */
  90   DBusMessage *oom_message;
  91   DBusPreallocatedSend *oom_preallocated;
  92   BusClientPolicy *policy;
  93
  94   char *cached_loginfo_string;
  95   BusSELinuxID *selinux_id;
  96
  97   long connection_tv_sec;  /**< Time when we connected (seconds component) */
  98   long connection_tv_usec; /**< Time when we connected (microsec component) */
  99   int stamp;               /**< connections->stamp last time we were traversed */
 100
 101 #ifdef DBUS_ENABLE_STATS
 102   int peak_match_rules;
 103   int peak_bus_names;
 104 #endif
 105 } BusConnectionData;
 106
 107 static dbus_bool_t bus_pending_reply_expired (BusExpireList *list,
 108                                               DBusList      *link,
 109                                               void          *data);
 110
 111 static void bus_connection_drop_pending_replies (BusConnections  *connections,
 112                                                  DBusConnection  *connection);
 113
 114 static dbus_bool_t expire_incomplete_timeout (void *data);
 115
 116 #define BUS_CONNECTION_DATA(connection) (dbus_connection_get_data ((connection), connection_data_slot))
 117
 118 static DBusLoop*
 119 connection_get_loop (DBusConnection *connection)
 120 {
 121   BusConnectionData *d;
 122
 123   d = BUS_CONNECTION_DATA (connection);
 124
 125   return bus_context_get_loop (d->connections->context);
 126 }
 127
 128
 129 static int
 130 get_connections_for_uid (BusConnections *connections,
 131                          dbus_uid_t      uid)
 132 {
 133   void *val;
 134   int current_count;
 135
 136   /* val is NULL is 0 when it isn't in the hash yet */
 137
 138   val = _dbus_hash_table_lookup_uintptr (connections->completed_by_user,
 139                                        uid);
 140
 141   current_count = _DBUS_POINTER_TO_INT (val);
 142
 143   return current_count;
 144 }
 145
 146 static dbus_bool_t
 147 adjust_connections_for_uid (BusConnections *connections,
 148                             dbus_uid_t      uid,
 149                             int             adjustment)
 150 {
 151   int current_count;
 152
 153   current_count = get_connections_for_uid (connections, uid);
 154
 155   _dbus_verbose ("Adjusting connection count for UID " DBUS_UID_FORMAT
 156                  ": was %d adjustment %d making %d\n",
 157                  uid, current_count, adjustment, current_count + adjustment);
 158
 159   _dbus_assert (current_count >= 0);
 160
 161   current_count += adjustment;
 162
 163   _dbus_assert (current_count >= 0);
 164
 165   if (current_count == 0)
 166     {
 167       _dbus_hash_table_remove_uintptr (connections->completed_by_user, uid);
 168       return TRUE;
 169     }
 170   else
 171     {
 172       dbus_bool_t retval;
 173
 174       retval = _dbus_hash_table_insert_uintptr (connections->completed_by_user,
 175                                               uid, _DBUS_INT_TO_POINTER (current_count));
 176
 177       /* only positive adjustment can fail as otherwise
 178        * a hash entry should already exist
 179        */
 180       _dbus_assert (adjustment > 0 ||
 181                     (adjustment <= 0 && retval));
 182
 183       return retval;
 184     }
 185 }
 186
 187 void
 188 bus_connection_disconnected (DBusConnection *connection)
 189 {
 190   BusConnectionData *d;
 191   BusService *service;
 192   BusMatchmaker *matchmaker;
 193
 194   d = BUS_CONNECTION_DATA (connection);
 195   _dbus_assert (d != NULL);
 196
 197   _dbus_verbose ("%s disconnected, dropping all service ownership and releasing\n",
 198                  d->name ? d->name : "(inactive)");
 199
 200   /* Delete our match rules */
 201   if (d->n_match_rules > 0)
 202     {
 203       matchmaker = bus_context_get_matchmaker (d->connections->context);
 204       bus_matchmaker_disconnected (matchmaker, connection);
 205     }
 206
 207   /* Drop any service ownership. Unfortunately, this requires
 208    * memory allocation and there doesn't seem to be a good way to
 209    * handle it other than sleeping; we can't "fail" the operation of
 210    * disconnecting a client, and preallocating a broadcast "service is
 211    * now gone" message for every client-service pair seems kind of
 212    * involved.
 213    */
 214   while ((service = _dbus_list_get_last (&d->services_owned)))
 215     {
 216       BusTransaction *transaction;
 217       DBusError error;
 218
 219     retry:
 220
 221       dbus_error_init (&error);
 222
 223       while ((transaction = bus_transaction_new (d->connections->context)) == NULL)
 224         _dbus_wait_for_memory ();
 225
 226       if (!bus_service_remove_owner (service, connection,
 227                                      transaction, &error))
 228         {
 229           _DBUS_ASSERT_ERROR_IS_SET (&error);
 230
 231           if (dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY))
 232             {
 233               dbus_error_free (&error);
 234               bus_transaction_cancel_and_free (transaction);
 235               _dbus_wait_for_memory ();
 236               goto retry;
 237             }
 238           else
 239             {
 240               _dbus_verbose ("Failed to remove service owner: %s %s\n",
 241                              error.name, error.message);
 242               _dbus_assert_not_reached ("Removing service owner failed for non-memory-related reason");
 243             }
 244         }
 245
 246       bus_transaction_execute_and_free (transaction);
 247     }
 248
 249   bus_dispatch_remove_connection (connection);
 250
 251   /* no more watching */
 252   if (!dbus_connection_set_watch_functions (connection,
 253                                             NULL, NULL, NULL,
 254                                             connection,
 255                                             NULL))
 256     _dbus_assert_not_reached ("setting watch functions to NULL failed");
 257
 258   if (!dbus_connection_set_timeout_functions (connection,
 259                                               NULL, NULL, NULL,
 260                                               connection,
 261                                               NULL))
 262     _dbus_assert_not_reached ("setting timeout functions to NULL failed");
 263
 264   dbus_connection_set_unix_user_function (connection,
 265                                           NULL, NULL, NULL);
 266   dbus_connection_set_windows_user_function (connection,
 267                                              NULL, NULL, NULL);
 268
 269   dbus_connection_set_dispatch_status_function (connection,
 270                                                 NULL, NULL, NULL);
 271
 272   bus_connection_remove_transactions (connection);
 273
 274   if (d->link_in_connection_list != NULL)
 275     {
 276       if (d->name != NULL)
 277         {
 278           unsigned long uid;
 279
 280           _dbus_list_remove_link (&d->connections->completed, d->link_in_connection_list);
 281           d->link_in_connection_list = NULL;
 282           d->connections->n_completed -= 1;
 283
 284           if (dbus_connection_get_unix_user (connection, &uid))
 285             {
 286               if (!adjust_connections_for_uid (d->connections,
 287                                                uid, -1))
 288                 _dbus_assert_not_reached ("adjusting downward should never fail");
 289             }
 290         }
 291       else
 292         {
 293           _dbus_list_remove_link (&d->connections->incomplete, d->link_in_connection_list);
 294           d->link_in_connection_list = NULL;
 295           d->connections->n_incomplete -= 1;
 296         }
 297
 298       _dbus_assert (d->connections->n_incomplete >= 0);
 299       _dbus_assert (d->connections->n_completed >= 0);
 300     }
 301
 302   bus_connection_drop_pending_replies (d->connections, connection);
 303
 304   /* frees "d" as side effect */
 305   dbus_connection_set_data (connection,
 306                             connection_data_slot,
 307                             NULL, NULL);
 308
 309   dbus_connection_unref (connection);
 310 }
 311
 312 static dbus_bool_t
 313 add_connection_watch (DBusWatch      *watch,
 314                       void           *data)
 315 {
 316   DBusConnection *connection = data;
 317
 318   return _dbus_loop_add_watch (connection_get_loop (connection), watch);
 319 }
 320
 321 static void
 322 remove_connection_watch (DBusWatch      *watch,
 323                          void           *data)
 324 {
 325   DBusConnection *connection = data;
 326
 327   _dbus_loop_remove_watch (connection_get_loop (connection), watch);
 328 }
 329
 330 static void
 331 toggle_connection_watch (DBusWatch      *watch,
 332                          void           *data)
 333 {
 334   DBusConnection *connection = data;
 335
 336   _dbus_loop_toggle_watch (connection_get_loop (connection), watch);
 337 }
 338
 339 static dbus_bool_t
 340 add_connection_timeout (DBusTimeout    *timeout,
 341                         void           *data)
 342 {
 343   DBusConnection *connection = data;
 344
 345   return _dbus_loop_add_timeout (connection_get_loop (connection), timeout);
 346 }
 347
 348 static void
 349 remove_connection_timeout (DBusTimeout    *timeout,
 350                            void           *data)
 351 {
 352   DBusConnection *connection = data;
 353
 354   _dbus_loop_remove_timeout (connection_get_loop (connection), timeout);
 355 }
 356
 357 static void
 358 dispatch_status_function (DBusConnection    *connection,
 359                           DBusDispatchStatus new_status,
 360                           void              *data)
 361 {
 362   DBusLoop *loop = data;
 363
 364   if (new_status != DBUS_DISPATCH_COMPLETE)
 365     {
 366       while (!_dbus_loop_queue_dispatch (loop, connection))
 367         _dbus_wait_for_memory ();
 368     }
 369 }
 370
 371 static dbus_bool_t
 372 allow_unix_user_function (DBusConnection *connection,
 373                           unsigned long   uid,
 374                           void           *data)
 375 {
 376   BusConnectionData *d;
 377
 378   d = BUS_CONNECTION_DATA (connection);
 379
 380   _dbus_assert (d != NULL);
 381
 382   return bus_context_allow_unix_user (d->connections->context, uid);
 383 }
 384
 385 static void
 386 free_connection_data (void *data)
 387 {
 388   BusConnectionData *d = data;
 389
 390   /* services_owned should be NULL since we should be disconnected */
 391   _dbus_assert (d->services_owned == NULL);
 392   _dbus_assert (d->n_services_owned == 0);
 393   /* similarly */
 394   _dbus_assert (d->transaction_messages == NULL);
 395
 396   if (d->oom_preallocated)
 397     dbus_connection_free_preallocated_send (d->connection, d->oom_preallocated);
 398
 399   if (d->oom_message)
 400     dbus_message_unref (d->oom_message);
 401
 402   if (d->policy)
 403     bus_client_policy_unref (d->policy);
 404
 405   if (d->selinux_id)
 406     bus_selinux_id_unref (d->selinux_id);
 407
 408   dbus_free (d->cached_loginfo_string);
 409
 410   dbus_free (d->name);
 411
 412   dbus_free (d);
 413 }
 414
 415 BusConnections*
 416 bus_connections_new (BusContext *context)
 417 {
 418   BusConnections *connections;
 419
 420   if (!dbus_connection_allocate_data_slot (&connection_data_slot))
 421     goto failed_0;
 422
 423   connections = dbus_new0 (BusConnections, 1);
 424   if (connections == NULL)
 425     goto failed_1;
 426
 427   connections->completed_by_user = _dbus_hash_table_new (DBUS_HASH_UINTPTR,
 428                                                          NULL, NULL);
 429   if (connections->completed_by_user == NULL)
 430     goto failed_2;
 431
 432   connections->expire_timeout = _dbus_timeout_new (100, /* irrelevant */
 433                                                    expire_incomplete_timeout,
 434                                                    connections, NULL);
 435   if (connections->expire_timeout == NULL)
 436     goto failed_3;
 437
 438   _dbus_timeout_set_enabled (connections->expire_timeout, FALSE);
 439
 440   connections->pending_replies = bus_expire_list_new (bus_context_get_loop (context),
 441                                                       bus_context_get_reply_timeout (context),
 442                                                       bus_pending_reply_expired,
 443                                                       connections);
 444   if (connections->pending_replies == NULL)
 445     goto failed_4;
 446
 447   if (!_dbus_loop_add_timeout (bus_context_get_loop (context),
 448                                connections->expire_timeout))
 449     goto failed_5;
 450
 451   connections->refcount = 1;
 452   connections->context = context;
 453
 454   return connections;
 455
 456  failed_5:
 457   bus_expire_list_free (connections->pending_replies);
 458  failed_4:
 459   _dbus_timeout_unref (connections->expire_timeout);
 460  failed_3:
 461   _dbus_hash_table_unref (connections->completed_by_user);
 462  failed_2:
 463   dbus_free (connections);
 464  failed_1:
 465   dbus_connection_free_data_slot (&connection_data_slot);
 466  failed_0:
 467   return NULL;
 468 }
 469
 470 BusConnections *
 471 bus_connections_ref (BusConnections *connections)
 472 {
 473   _dbus_assert (connections->refcount > 0);
 474   connections->refcount += 1;
 475
 476   return connections;
 477 }
 478
 479 void
 480 bus_connections_unref (BusConnections *connections)
 481 {
 482   _dbus_assert (connections->refcount > 0);
 483   connections->refcount -= 1;
 484   if (connections->refcount == 0)
 485     {
 486       /* drop all incomplete */
 487       while (connections->incomplete != NULL)
 488         {
 489           DBusConnection *connection;
 490
 491           connection = connections->incomplete->data;
 492
 493           dbus_connection_ref (connection);
 494           dbus_connection_close (connection);
 495           bus_connection_disconnected (connection);
 496           dbus_connection_unref (connection);
 497         }
 498
 499       _dbus_assert (connections->n_incomplete == 0);
 500
 501       /* drop all real connections */
 502       while (connections->completed != NULL)
 503         {
 504           DBusConnection *connection;
 505
 506           connection = connections->completed->data;
 507
 508           dbus_connection_ref (connection);
 509           dbus_connection_close (connection);
 510           bus_connection_disconnected (connection);
 511           dbus_connection_unref (connection);
 512         }
 513
 514       _dbus_assert (connections->n_completed == 0);
 515
 516       bus_expire_list_free (connections->pending_replies);
 517
 518       _dbus_loop_remove_timeout (bus_context_get_loop (connections->context),
 519                                  connections->expire_timeout);
 520
 521       _dbus_timeout_unref (connections->expire_timeout);
 522
 523       _dbus_hash_table_unref (connections->completed_by_user);
 524
 525       dbus_free (connections);
 526
 527       dbus_connection_free_data_slot (&connection_data_slot);
 528     }
 529 }
 530
 531 /* Used for logging */
 532 static dbus_bool_t
 533 cache_peer_loginfo_string (BusConnectionData *d,
 534                            DBusConnection    *connection)
 535 {
 536   DBusString loginfo_buf;
 537   unsigned long uid;
 538   unsigned long pid;
 539   char *windows_sid;
 540   dbus_bool_t prev_added;
 541
 542   if (!_dbus_string_init (&loginfo_buf))
 543     return FALSE;
 544
 545   prev_added = FALSE;
 546   if (dbus_connection_get_unix_user (connection, &uid))
 547     {
 548       if (!_dbus_string_append_printf (&loginfo_buf, "uid=%ld", uid))
 549         goto oom;
 550       else
 551         prev_added = TRUE;
 552     }
 553
 554   if (dbus_connection_get_unix_process_id (connection, &pid))
 555     {
 556       if (prev_added)
 557         {
 558           if (!_dbus_string_append_byte (&loginfo_buf, ' '))
 559             goto oom;
 560         }
 561       if (!_dbus_string_append_printf (&loginfo_buf, "pid=%ld comm=\"", pid))
 562         goto oom;
 563       /* Ignore errors here; we may not have permissions to read the
 564        * proc file. */
 565       _dbus_command_for_pid (pid, &loginfo_buf, MAX_LOG_COMMAND_LEN, NULL);
 566       if (!_dbus_string_append_byte (&loginfo_buf, '"'))
 567         goto oom;
 568     }
 569
 570   if (dbus_connection_get_windows_user (connection, &windows_sid))
 571     {
 572       dbus_bool_t did_append;
 573       did_append = _dbus_string_append_printf (&loginfo_buf,
 574                                                "sid=\"%s\" ", windows_sid);
 575       dbus_free (windows_sid);
 576       if (!did_append)
 577         goto oom;
 578     }
 579
 580   if (!_dbus_string_steal_data (&loginfo_buf, &(d->cached_loginfo_string)))
 581     goto oom;
 582
 583   _dbus_string_free (&loginfo_buf);
 584
 585   return TRUE;
 586 oom:
 587    _dbus_string_free (&loginfo_buf);
 588    return FALSE;
 589 }
 590
 591 dbus_bool_t
 592 bus_connections_setup_connection (BusConnections *connections,
 593                                   DBusConnection *connection)
 594 {
 595
 596   BusConnectionData *d;
 597   dbus_bool_t retval;
 598   DBusError error;
 599
 600
 601   d = dbus_new0 (BusConnectionData, 1);
 602
 603   if (d == NULL)
 604     return FALSE;
 605
 606   d->connections = connections;
 607   d->connection = connection;
 608
 609   _dbus_get_monotonic_time (&d->connection_tv_sec,
 610                             &d->connection_tv_usec);
 611
 612   _dbus_assert (connection_data_slot >= 0);
 613
 614   if (!dbus_connection_set_data (connection,
 615                                  connection_data_slot,
 616                                  d, free_connection_data))
 617     {
 618       dbus_free (d);
 619       return FALSE;
 620     }
 621
 622   dbus_connection_set_route_peer_messages (connection, TRUE);
 623
 624   retval = FALSE;
 625
 626   dbus_error_init (&error);
 627   d->selinux_id = bus_selinux_init_connection_id (connection,
 628                                                   &error);
 629   if (dbus_error_is_set (&error))
 630     {
 631       /* This is a bit bogus because we pretend all errors
 632        * are OOM; this is done because we know that in bus.c
 633        * an OOM error disconnects the connection, which is
 634        * the same thing we want on any other error.
 635        */
 636       dbus_error_free (&error);
 637       goto out;
 638     }
 639
 640   if (!dbus_connection_set_watch_functions (connection,
 641                                             add_connection_watch,
 642                                             remove_connection_watch,
 643                                             toggle_connection_watch,
 644                                             connection,
 645                                             NULL))
 646     goto out;
 647
 648   if (!dbus_connection_set_timeout_functions (connection,
 649                                               add_connection_timeout,
 650                                               remove_connection_timeout,
 651                                               NULL,
 652                                               connection, NULL))
 653     goto out;
 654
 655   /* For now we don't need to set a Windows user function because
 656    * there are no policies in the config file controlling what
 657    * Windows users can connect. The default 'same user that owns the
 658    * bus can connect' behavior of DBusConnection is fine on Windows.
 659    */
 660   dbus_connection_set_unix_user_function (connection,
 661                                           allow_unix_user_function,
 662                                           NULL, NULL);
 663
 664   dbus_connection_set_dispatch_status_function (connection,
 665                                                 dispatch_status_function,
 666                                                 bus_context_get_loop (connections->context),
 667                                                 NULL);
 668
 669   d->link_in_connection_list = _dbus_list_alloc_link (connection);
 670   if (d->link_in_connection_list == NULL)
 671     goto out;
 672
 673   /* Setup the connection with the dispatcher */
 674   if (!bus_dispatch_add_connection (connection))
 675     goto out;
 676
 677   if (dbus_connection_get_dispatch_status (connection) != DBUS_DISPATCH_COMPLETE)
 678     {
 679       if (!_dbus_loop_queue_dispatch (bus_context_get_loop (connections->context), connection))
 680         {
 681           bus_dispatch_remove_connection (connection);
 682           goto out;
 683         }
 684     }
 685
 686   _dbus_list_append_link (&connections->incomplete, d->link_in_connection_list);
 687   connections->n_incomplete += 1;
 688
 689   dbus_connection_ref (connection);
 690
 691   /* Note that we might disconnect ourselves here, but it only takes
 692    * effect on return to the main loop. We call this to free up
 693    * expired connections if possible, and to queue the timeout for our
 694    * own expiration.
 695    */
 696   bus_connections_expire_incomplete (connections);
 697
 698   /* And we might also disconnect ourselves here, but again it
 699    * only takes effect on return to main loop.
 700    */
 701   if (connections->n_incomplete >
 702       bus_context_get_max_incomplete_connections (connections->context))
 703     {
 704       _dbus_verbose ("Number of incomplete connections exceeds max, dropping oldest one\n");
 705
 706       _dbus_assert (connections->incomplete != NULL);
 707       /* Disconnect the oldest unauthenticated connection.  FIXME
 708        * would it be more secure to drop a *random* connection?  This
 709        * algorithm seems to mean that if someone can create new
 710        * connections quickly enough, they can keep anyone else from
 711        * completing authentication. But random may or may not really
 712        * help with that, a more elaborate solution might be required.
 713        */
 714       dbus_connection_close (connections->incomplete->data);
 715     }
 716
 717   retval = TRUE;
 718
 719  out:
 720   if (!retval)
 721     {
 722       if (d->selinux_id)
 723         bus_selinux_id_unref (d->selinux_id);
 724       d->selinux_id = NULL;
 725
 726       if (!dbus_connection_set_watch_functions (connection,
 727                                                 NULL, NULL, NULL,
 728                                                 connection,
 729                                                 NULL))
 730         _dbus_assert_not_reached ("setting watch functions to NULL failed");
 731
 732       if (!dbus_connection_set_timeout_functions (connection,
 733                                                   NULL, NULL, NULL,
 734                                                   connection,
 735                                                   NULL))
 736         _dbus_assert_not_reached ("setting timeout functions to NULL failed");
 737
 738       dbus_connection_set_unix_user_function (connection,
 739                                               NULL, NULL, NULL);
 740
 741       dbus_connection_set_windows_user_function (connection,
 742                                                  NULL, NULL, NULL);
 743
 744       dbus_connection_set_dispatch_status_function (connection,
 745                                                     NULL, NULL, NULL);
 746
 747       if (d->link_in_connection_list != NULL)
 748         {
 749           _dbus_assert (d->link_in_connection_list->next == NULL);
 750           _dbus_assert (d->link_in_connection_list->prev == NULL);
 751           _dbus_list_free_link (d->link_in_connection_list);
 752           d->link_in_connection_list = NULL;
 753         }
 754
 755       if (!dbus_connection_set_data (connection,
 756                                      connection_data_slot,
 757                                      NULL, NULL))
 758         _dbus_assert_not_reached ("failed to set connection data to null");
 759
 760       /* "d" has now been freed */
 761     }
 762
 763   return retval;
 764 }
 765
 766 void
 767 bus_connections_expire_incomplete (BusConnections *connections)
 768 {
 769   int next_interval;
 770
 771   next_interval = -1;
 772
 773   if (connections->incomplete != NULL)
 774     {
 775       long tv_sec, tv_usec;
 776       DBusList *link;
 777       int auth_timeout;
 778
 779       _dbus_get_monotonic_time (&tv_sec, &tv_usec);
 780       auth_timeout = bus_context_get_auth_timeout (connections->context);
 781
 782       link = _dbus_list_get_first_link (&connections->incomplete);
 783       while (link != NULL)
 784         {
 785           DBusList *next = _dbus_list_get_next_link (&connections->incomplete, link);
 786           DBusConnection *connection;
 787           BusConnectionData *d;
 788           double elapsed;
 789
 790           connection = link->data;
 791
 792           d = BUS_CONNECTION_DATA (connection);
 793
 794           _dbus_assert (d != NULL);
 795
 796           elapsed = ELAPSED_MILLISECONDS_SINCE (d->connection_tv_sec,
 797                                                 d->connection_tv_usec,
 798                                                 tv_sec, tv_usec);
 799
 800           if (elapsed >= (double) auth_timeout)
 801             {
 802               _dbus_verbose ("Timing out authentication for connection %p\n", connection);
 803               dbus_connection_close (connection);
 804             }
 805           else
 806             {
 807               /* We can end the loop, since the connections are in oldest-first order */
 808               next_interval = ((double)auth_timeout) - elapsed;
 809               _dbus_verbose ("Connection %p authentication expires in %d milliseconds\n",
 810                              connection, next_interval);
 811
 812               break;
 813             }
 814
 815           link = next;
 816         }
 817     }
 818
 819   bus_expire_timeout_set_interval (connections->expire_timeout,
 820                                    next_interval);
 821 }
 822
 823 static dbus_bool_t
 824 expire_incomplete_timeout (void *data)
 825 {
 826   BusConnections *connections = data;
 827
 828   _dbus_verbose ("Running\n");
 829
 830   /* note that this may remove the timeout */
 831   bus_connections_expire_incomplete (connections);
 832
 833   return TRUE;
 834 }
 835
 836 dbus_bool_t
 837 bus_connection_get_unix_groups  (DBusConnection   *connection,
 838                                  unsigned long   **groups,
 839                                  int              *n_groups,
 840                                  DBusError        *error)
 841 {
 842   unsigned long uid;
 843
 844   *groups = NULL;
 845   *n_groups = 0;
 846
 847   if (dbus_connection_get_unix_user (connection, &uid))
 848     {
 849       if (!_dbus_unix_groups_from_uid (uid, groups, n_groups))
 850         {
 851           _dbus_verbose ("Did not get any groups for UID %lu\n",
 852                          uid);
 853           return FALSE;
 854         }
 855       else
 856         {
 857           _dbus_verbose ("Got %d groups for UID %lu\n",
 858                          *n_groups, uid);
 859           return TRUE;
 860         }
 861     }
 862   else
 863     return TRUE; /* successfully got 0 groups */
 864 }
 865
 866 dbus_bool_t
 867 bus_connection_is_in_unix_group (DBusConnection *connection,
 868                                  unsigned long   gid)
 869 {
 870   int i;
 871   unsigned long *group_ids;
 872   int n_group_ids;
 873
 874   if (!bus_connection_get_unix_groups (connection, &group_ids, &n_group_ids,
 875                                        NULL))
 876     return FALSE;
 877
 878   i = 0;
 879   while (i < n_group_ids)
 880     {
 881       if (group_ids[i] == gid)
 882         {
 883           dbus_free (group_ids);
 884           return TRUE;
 885         }
 886       ++i;
 887     }
 888
 889   dbus_free (group_ids);
 890   return FALSE;
 891 }
 892
 893 const char *
 894 bus_connection_get_loginfo (DBusConnection        *connection)
 895 {
 896   BusConnectionData *d;
 897
 898   d = BUS_CONNECTION_DATA (connection);
 899
 900   if (!bus_connection_is_active (connection))
 901     return "inactive";
 902   return d->cached_loginfo_string;
 903 }
 904
 905 BusClientPolicy*
 906 bus_connection_get_policy (DBusConnection *connection)
 907 {
 908   BusConnectionData *d;
 909
 910   d = BUS_CONNECTION_DATA (connection);
 911
 912   _dbus_assert (d != NULL);
 913   _dbus_assert (d->policy != NULL);
 914
 915   return d->policy;
 916 }
 917
 918 static dbus_bool_t
 919 foreach_active (BusConnections               *connections,
 920                 BusConnectionForeachFunction  function,
 921                 void                         *data)
 922 {
 923   DBusList *link;
 924
 925   link = _dbus_list_get_first_link (&connections->completed);
 926   while (link != NULL)
 927     {
 928       DBusConnection *connection = link->data;
 929       DBusList *next = _dbus_list_get_next_link (&connections->completed, link);
 930
 931       if (!(* function) (connection, data))
 932         return FALSE;
 933
 934       link = next;
 935     }
 936
 937   return TRUE;
 938 }
 939
 940 static dbus_bool_t
 941 foreach_inactive (BusConnections               *connections,
 942                   BusConnectionForeachFunction  function,
 943                   void                         *data)
 944 {
 945   DBusList *link;
 946
 947   link = _dbus_list_get_first_link (&connections->incomplete);
 948   while (link != NULL)
 949     {
 950       DBusConnection *connection = link->data;
 951       DBusList *next = _dbus_list_get_next_link (&connections->incomplete, link);
 952
 953       if (!(* function) (connection, data))
 954         return FALSE;
 955
 956       link = next;
 957     }
 958
 959   return TRUE;
 960 }
 961
 962 /**
 963  * Calls function on each active connection; if the function returns
 964  * #FALSE, stops iterating. Active connections are authenticated
 965  * and have sent a Hello message.
 966  *
 967  * @param connections the connections object
 968  * @param function the function
 969  * @param data data to pass to it as a second arg
 970  */
 971 void
 972 bus_connections_foreach_active (BusConnections               *connections,
 973                                 BusConnectionForeachFunction  function,
 974                                 void                         *data)
 975 {
 976   foreach_active (connections, function, data);
 977 }
 978
 979 /**
 980  * Calls function on each connection; if the function returns
 981  * #FALSE, stops iterating.
 982  *
 983  * @param connections the connections object
 984  * @param function the function
 985  * @param data data to pass to it as a second arg
 986  */
 987 void
 988 bus_connections_foreach (BusConnections               *connections,
 989                          BusConnectionForeachFunction  function,
 990                          void                         *data)
 991 {
 992   if (!foreach_active (connections, function, data))
 993     return;
 994
 995   foreach_inactive (connections, function, data);
 996 }
 997
 998 BusContext*
 999 bus_connections_get_context (BusConnections *connections)
1000 {
1001   return connections->context;
1002 }
1003
1004 /*
1005  * This is used to avoid covering the same connection twice when
1006  * traversing connections. Note that it assumes we will
1007  * bus_connection_mark_stamp() each connection at least once per
1008  * INT_MAX increments of the global stamp, or wraparound would break
1009  * things.
1010  */
1011 void
1012 bus_connections_increment_stamp (BusConnections *connections)
1013 {
1014   connections->stamp += 1;
1015 }
1016
1017 /* Mark connection with current stamp, return TRUE if it
1018  * didn't already have that stamp
1019  */
1020 dbus_bool_t
1021 bus_connection_mark_stamp (DBusConnection *connection)
1022 {
1023   BusConnectionData *d;
1024
1025   d = BUS_CONNECTION_DATA (connection);
1026
1027   _dbus_assert (d != NULL);
1028
1029   if (d->stamp == d->connections->stamp)
1030     return FALSE;
1031   else
1032     {
1033       d->stamp = d->connections->stamp;
1034       return TRUE;
1035     }
1036 }
1037
1038 BusContext*
1039 bus_connection_get_context (DBusConnection *connection)
1040 {
1041   BusConnectionData *d;
1042
1043   d = BUS_CONNECTION_DATA (connection);
1044
1045   _dbus_assert (d != NULL);
1046
1047   return d->connections->context;
1048 }
1049
1050 BusConnections*
1051 bus_connection_get_connections (DBusConnection *connection)
1052 {
1053   BusConnectionData *d;
1054
1055   d = BUS_CONNECTION_DATA (connection);
1056
1057   _dbus_assert (d != NULL);
1058
1059   return d->connections;
1060 }
1061
1062 BusRegistry*
1063 bus_connection_get_registry (DBusConnection *connection)
1064 {
1065   BusConnectionData *d;
1066
1067   d = BUS_CONNECTION_DATA (connection);
1068
1069   _dbus_assert (d != NULL);
1070
1071   return bus_context_get_registry (d->connections->context);
1072 }
1073
1074 BusActivation*
1075 bus_connection_get_activation (DBusConnection *connection)
1076 {
1077   BusConnectionData *d;
1078
1079   d = BUS_CONNECTION_DATA (connection);
1080
1081   _dbus_assert (d != NULL);
1082
1083   return bus_context_get_activation (d->connections->context);
1084 }
1085
1086 BusMatchmaker*
1087 bus_connection_get_matchmaker (DBusConnection *connection)
1088 {
1089   BusConnectionData *d;
1090
1091   d = BUS_CONNECTION_DATA (connection);
1092
1093   _dbus_assert (d != NULL);
1094
1095   return bus_context_get_matchmaker (d->connections->context);
1096 }
1097
1098 BusSELinuxID*
1099 bus_connection_get_selinux_id (DBusConnection *connection)
1100 {
1101   BusConnectionData *d;
1102
1103   d = BUS_CONNECTION_DATA (connection);
1104
1105   _dbus_assert (d != NULL);
1106
1107   return d->selinux_id;
1108 }
1109
1110 /**
1111  * Checks whether the connection is registered with the message bus.
1112  *
1113  * @param connection the connection
1114  * @returns #TRUE if we're an active message bus participant
1115  */
1116 dbus_bool_t
1117 bus_connection_is_active (DBusConnection *connection)
1118 {
1119   BusConnectionData *d;
1120
1121   d = BUS_CONNECTION_DATA (connection);
1122
1123   return d != NULL && d->name != NULL;
1124 }
1125
1126 dbus_bool_t
1127 bus_connection_preallocate_oom_error (DBusConnection *connection)
1128 {
1129   DBusMessage *message;
1130   DBusPreallocatedSend *preallocated;
1131   BusConnectionData *d;
1132
1133   d = BUS_CONNECTION_DATA (connection);
1134
1135   _dbus_assert (d != NULL);
1136
1137   if (d->oom_preallocated != NULL)
1138     return TRUE;
1139
1140   preallocated = dbus_connection_preallocate_send (connection);
1141   if (preallocated == NULL)
1142     return FALSE;
1143
1144   message = dbus_message_new (DBUS_MESSAGE_TYPE_ERROR);
1145
1146   if (message == NULL)
1147     {
1148       dbus_connection_free_preallocated_send (connection, preallocated);
1149       return FALSE;
1150     }
1151
1152   /* d->name may be NULL, but that is OK */
1153   if (!dbus_message_set_error_name (message, DBUS_ERROR_NO_MEMORY) ||
1154       !dbus_message_set_destination (message, d->name) ||
1155       !dbus_message_set_sender (message,
1156                                 DBUS_SERVICE_DBUS))
1157     {
1158       dbus_connection_free_preallocated_send (connection, preallocated);
1159       dbus_message_unref (message);
1160       return FALSE;
1161     }
1162
1163   /* set reply serial to placeholder value just so space is already allocated
1164    * for it.
1165    */
1166   if (!dbus_message_set_reply_serial (message, 14))
1167     {
1168       dbus_connection_free_preallocated_send (connection, preallocated);
1169       dbus_message_unref (message);
1170       return FALSE;
1171     }
1172
1173   d->oom_message = message;
1174   d->oom_preallocated = preallocated;
1175
1176   return TRUE;
1177 }
1178
1179 void
1180 bus_connection_send_oom_error (DBusConnection *connection,
1181                                DBusMessage    *in_reply_to)
1182 {
1183   BusConnectionData *d;
1184
1185   d = BUS_CONNECTION_DATA (connection);
1186
1187   _dbus_assert (d != NULL);
1188   _dbus_assert (d->oom_message != NULL);
1189
1190   /* should always succeed since we set it to a placeholder earlier */
1191   if (!dbus_message_set_reply_serial (d->oom_message,
1192                                       dbus_message_get_serial (in_reply_to)))
1193     _dbus_assert_not_reached ("Failed to set reply serial for preallocated oom message");
1194
1195   _dbus_assert (dbus_message_get_sender (d->oom_message) != NULL);
1196
1197   dbus_connection_send_preallocated (connection, d->oom_preallocated,
1198                                      d->oom_message, NULL);
1199
1200   dbus_message_unref (d->oom_message);
1201   d->oom_message = NULL;
1202   d->oom_preallocated = NULL;
1203 }
1204
1205 #ifdef DBUS_ENABLE_STATS
1206 static void
1207 update_peak (int *peak,
1208              int n)
1209 {
1210   if (*peak < n)
1211     *peak = n;
1212 }
1213 #endif
1214
1215 void
1216 bus_connection_add_match_rule_link (DBusConnection *connection,
1217                                     DBusList       *link)
1218 {
1219   BusConnectionData *d;
1220
1221   d = BUS_CONNECTION_DATA (connection);
1222   _dbus_assert (d != NULL);
1223
1224   _dbus_list_append_link (&d->match_rules, link);
1225
1226   d->n_match_rules += 1;
1227
1228 #ifdef DBUS_ENABLE_STATS
1229   update_peak (&d->peak_match_rules, d->n_match_rules);
1230   update_peak (&d->connections->peak_match_rules_per_conn, d->n_match_rules);
1231
1232   d->connections->total_match_rules += 1;
1233   update_peak (&d->connections->peak_match_rules,
1234                d->connections->total_match_rules);
1235 #endif
1236 }
1237
1238 dbus_bool_t
1239 bus_connection_add_match_rule (DBusConnection *connection,
1240                                BusMatchRule   *rule)
1241 {
1242     DBusList *link;
1243
1244   link = _dbus_list_alloc_link (rule);
1245
1246   if (link == NULL)
1247     return FALSE;
1248
1249   bus_connection_add_match_rule_link (connection, link);
1250
1251   return TRUE;
1252 }
1253
1254 void
1255 bus_connection_remove_match_rule (DBusConnection *connection,
1256                                   BusMatchRule   *rule)
1257 {
1258   BusConnectionData *d;
1259
1260   d = BUS_CONNECTION_DATA (connection);
1261   _dbus_assert (d != NULL);
1262
1263   _dbus_list_remove_last (&d->match_rules, rule);
1264
1265   d->n_match_rules -= 1;
1266   _dbus_assert (d->n_match_rules >= 0);
1267
1268 #ifdef DBUS_ENABLE_STATS
1269   d->connections->total_match_rules -= 1;
1270 #endif
1271 }
1272
1273 int
1274 bus_connection_get_n_match_rules (DBusConnection *connection)
1275 {
1276   BusConnectionData *d;
1277
1278   d = BUS_CONNECTION_DATA (connection);
1279   _dbus_assert (d != NULL);
1280
1281   return d->n_match_rules;
1282 }
1283
1284 void
1285 bus_connection_add_owned_service_link (DBusConnection *connection,
1286                                        DBusList       *link)
1287 {
1288   BusConnectionData *d;
1289
1290   d = BUS_CONNECTION_DATA (connection);
1291   _dbus_assert (d != NULL);
1292
1293   _dbus_list_append_link (&d->services_owned, link);
1294
1295   d->n_services_owned += 1;
1296
1297 #ifdef DBUS_ENABLE_STATS
1298   update_peak (&d->peak_bus_names, d->n_services_owned);
1299   update_peak (&d->connections->peak_bus_names_per_conn,
1300                d->n_services_owned);
1301
1302   d->connections->total_bus_names += 1;
1303   update_peak (&d->connections->peak_bus_names,
1304                d->connections->total_bus_names);
1305 #endif
1306 }
1307
1308 dbus_bool_t
1309 bus_connection_add_owned_service (DBusConnection *connection,
1310                                   BusService     *service)
1311 {
1312   DBusList *link;
1313
1314   link = _dbus_list_alloc_link (service);
1315
1316   if (link == NULL)
1317     return FALSE;
1318
1319   bus_connection_add_owned_service_link (connection, link);
1320
1321   return TRUE;
1322 }
1323
1324 void
1325 bus_connection_remove_owned_service (DBusConnection *connection,
1326                                      BusService     *service)
1327 {
1328   BusConnectionData *d;
1329
1330   d = BUS_CONNECTION_DATA (connection);
1331   _dbus_assert (d != NULL);
1332
1333   _dbus_list_remove_last (&d->services_owned, service);
1334
1335   d->n_services_owned -= 1;
1336   _dbus_assert (d->n_services_owned >= 0);
1337
1338 #ifdef DBUS_ENABLE_STATS
1339   d->connections->total_bus_names -= 1;
1340 #endif
1341 }
1342
1343 int
1344 bus_connection_get_n_services_owned (DBusConnection *connection)
1345 {
1346   BusConnectionData *d;
1347
1348   d = BUS_CONNECTION_DATA (connection);
1349   _dbus_assert (d != NULL);
1350
1351   return d->n_services_owned;
1352 }
1353
1354 dbus_bool_t
1355 bus_connection_complete (DBusConnection   *connection,
1356                          const DBusString *name,
1357                          DBusError        *error)
1358 {
1359   BusConnectionData *d;
1360   unsigned long uid;
1361
1362   d = BUS_CONNECTION_DATA (connection);
1363   _dbus_assert (d != NULL);
1364   _dbus_assert (d->name == NULL);
1365   _dbus_assert (d->policy == NULL);
1366
1367   _dbus_assert (!bus_connection_is_active (connection));
1368
1369   if (!_dbus_string_copy_data (name, &d->name))
1370     {
1371       BUS_SET_OOM (error);
1372       return FALSE;
1373     }
1374
1375   _dbus_assert (d->name != NULL);
1376
1377   _dbus_verbose ("Name %s assigned to %p\n", d->name, connection);
1378
1379   d->policy = bus_context_create_client_policy (d->connections->context,
1380                                                 connection,
1381                                                 error);
1382
1383   /* we may have a NULL policy on OOM or error getting list of
1384    * groups for a user. In the latter case we don't handle it so
1385    * well currently, as it will just keep failing over and over.
1386    */
1387
1388   if (d->policy == NULL)
1389     {
1390       _dbus_verbose ("Failed to create security policy for connection %p\n",
1391                      connection);
1392       _DBUS_ASSERT_ERROR_IS_SET (error);
1393       dbus_free (d->name);
1394       d->name = NULL;
1395       return FALSE;
1396     }
1397
1398   if (dbus_connection_get_unix_user (connection, &uid))
1399     {
1400       if (!adjust_connections_for_uid (d->connections,
1401                                        uid, 1))
1402         goto fail;
1403     }
1404
1405   /* Create and cache a string which holds information about the
1406    * peer process; used for logging purposes.
1407    */
1408   if (!cache_peer_loginfo_string (d, connection))
1409     goto fail;
1410
1411   /* Now the connection is active, move it between lists */
1412   _dbus_list_unlink (&d->connections->incomplete,
1413                      d->link_in_connection_list);
1414   d->connections->n_incomplete -= 1;
1415   _dbus_list_append_link (&d->connections->completed,
1416                           d->link_in_connection_list);
1417   d->connections->n_completed += 1;
1418
1419   _dbus_assert (d->connections->n_incomplete >= 0);
1420   _dbus_assert (d->connections->n_completed > 0);
1421
1422   /* See if we can remove the timeout */
1423   bus_connections_expire_incomplete (d->connections);
1424
1425   _dbus_assert (bus_connection_is_active (connection));
1426
1427   return TRUE;
1428 fail:
1429   BUS_SET_OOM (error);
1430   dbus_free (d->name);
1431   d->name = NULL;
1432   if (d->policy)
1433     bus_client_policy_unref (d->policy);
1434   d->policy = NULL;
1435   return FALSE;
1436 }
1437
1438 const char *
1439 bus_connection_get_name (DBusConnection *connection)
1440 {
1441   BusConnectionData *d;
1442
1443   d = BUS_CONNECTION_DATA (connection);
1444   _dbus_assert (d != NULL);
1445
1446   return d->name;
1447 }
1448
1449 /**
1450  * Check whether completing the passed-in connection would
1451  * exceed limits, and if so set error and return #FALSE
1452  */
1453 dbus_bool_t
1454 bus_connections_check_limits (BusConnections  *connections,
1455                               DBusConnection  *requesting_completion,
1456                               DBusError       *error)
1457 {
1458   unsigned long uid;
1459
1460   if (connections->n_completed >=
1461       bus_context_get_max_completed_connections (connections->context))
1462     {
1463       dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
1464                       "The maximum number of active connections has been reached");
1465       return FALSE;
1466     }
1467
1468   if (dbus_connection_get_unix_user (requesting_completion, &uid))
1469     {
1470       if (get_connections_for_uid (connections, uid) >=
1471           bus_context_get_max_connections_per_user (connections->context))
1472         {
1473           dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
1474                           "The maximum number of active connections for UID %lu has been reached",
1475                           uid);
1476           return FALSE;
1477         }
1478     }
1479
1480   return TRUE;
1481 }
1482
1483 static void
1484 bus_pending_reply_free (BusPendingReply *pending)
1485 {
1486   _dbus_verbose ("Freeing pending reply %p, replier %p receiver %p serial %u\n",
1487                  pending,
1488                  pending->will_send_reply,
1489                  pending->will_get_reply,
1490                  pending->reply_serial);
1491
1492   dbus_free (pending);
1493 }
1494
1495 static dbus_bool_t
1496 bus_pending_reply_send_no_reply (BusConnections  *connections,
1497                                  BusTransaction  *transaction,
1498                                  BusPendingReply *pending)
1499 {
1500   DBusMessage *message;
1501   DBusMessageIter iter;
1502   dbus_bool_t retval;
1503   const char *errmsg;
1504
1505   retval = FALSE;
1506
1507   message = dbus_message_new (DBUS_MESSAGE_TYPE_ERROR);
1508   if (message == NULL)
1509     return FALSE;
1510
1511   dbus_message_set_no_reply (message, TRUE);
1512
1513   if (!dbus_message_set_reply_serial (message,
1514                                       pending->reply_serial))
1515     goto out;
1516
1517   if (!dbus_message_set_error_name (message,
1518                                     DBUS_ERROR_NO_REPLY))
1519     goto out;
1520
1521   errmsg = "Message did not receive a reply (timeout by message bus)";
1522   dbus_message_iter_init_append (message, &iter);
1523   if (!dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &errmsg))
1524     goto out;
1525
1526   if (!bus_transaction_send_from_driver (transaction, pending->will_get_reply,
1527                                          message))
1528     goto out;
1529
1530   retval = TRUE;
1531
1532  out:
1533   dbus_message_unref (message);
1534   return retval;
1535 }
1536
1537 static dbus_bool_t
1538 bus_pending_reply_expired (BusExpireList *list,
1539                            DBusList      *link,
1540                            void          *data)
1541 {
1542   BusPendingReply *pending = link->data;
1543   BusConnections *connections = data;
1544   BusTransaction *transaction;
1545
1546   /* No reply is forthcoming. So nuke it if we can. If not,
1547    * leave it in the list to try expiring again later when we
1548    * get more memory.
1549    */
1550
1551   _dbus_verbose ("Expiring pending reply %p, replier %p receiver %p serial %u\n",
1552                  pending,
1553                  pending->will_send_reply,
1554                  pending->will_get_reply,
1555                  pending->reply_serial);
1556
1557   transaction = bus_transaction_new (connections->context);
1558   if (transaction == NULL)
1559     return FALSE;
1560
1561   if (!bus_pending_reply_send_no_reply (connections,
1562                                         transaction,
1563                                         pending))
1564     {
1565       bus_transaction_cancel_and_free (transaction);
1566       return FALSE;
1567     }
1568
1569   bus_expire_list_remove_link (connections->pending_replies, link);
1570
1571   bus_pending_reply_free (pending);
1572   bus_transaction_execute_and_free (transaction);
1573
1574   return TRUE;
1575 }
1576
1577 static void
1578 bus_connection_drop_pending_replies (BusConnections  *connections,
1579                                      DBusConnection  *connection)
1580 {
1581   /* The DBusConnection is almost 100% finalized here, so you can't
1582    * do anything with it except check for pointer equality
1583    */
1584   DBusList *link;
1585
1586   _dbus_verbose ("Dropping pending replies that involve connection %p\n",
1587                  connection);
1588
1589   link = bus_expire_list_get_first_link (connections->pending_replies);
1590   while (link != NULL)
1591     {
1592       DBusList *next;
1593       BusPendingReply *pending;
1594
1595       next = bus_expire_list_get_next_link (connections->pending_replies,
1596                                             link);
1597       pending = link->data;
1598
1599       if (pending->will_get_reply == connection)
1600         {
1601           /* We don't need to track this pending reply anymore */
1602
1603           _dbus_verbose ("Dropping pending reply %p, replier %p receiver %p serial %u\n",
1604                          pending,
1605                          pending->will_send_reply,
1606                          pending->will_get_reply,
1607                          pending->reply_serial);
1608
1609           bus_expire_list_remove_link (connections->pending_replies,
1610                                        link);
1611           bus_pending_reply_free (pending);
1612         }
1613       else if (pending->will_send_reply == connection)
1614         {
1615           /* The reply isn't going to be sent, so set things
1616            * up so it will be expired right away
1617            */
1618           _dbus_verbose ("Will expire pending reply %p, replier %p receiver %p serial %u\n",
1619                          pending,
1620                          pending->will_send_reply,
1621                          pending->will_get_reply,
1622                          pending->reply_serial);
1623
1624           pending->will_send_reply = NULL;
1625           pending->expire_item.added_tv_sec = 0;
1626           pending->expire_item.added_tv_usec = 0;
1627
1628           bus_expire_list_recheck_immediately (connections->pending_replies);
1629         }
1630
1631       link = next;
1632     }
1633 }
1634
1635
1636 typedef struct
1637 {
1638   BusPendingReply *pending;
1639   BusConnections  *connections;
1640 } CancelPendingReplyData;
1641
1642 static void
1643 cancel_pending_reply (void *data)
1644 {
1645   CancelPendingReplyData *d = data;
1646
1647   _dbus_verbose ("d = %p\n", d);
1648
1649   if (!bus_expire_list_remove (d->connections->pending_replies,
1650                                &d->pending->expire_item))
1651     _dbus_assert_not_reached ("pending reply did not exist to be cancelled");
1652
1653   bus_pending_reply_free (d->pending); /* since it's been cancelled */
1654 }
1655
1656 static void
1657 cancel_pending_reply_data_free (void *data)
1658 {
1659   CancelPendingReplyData *d = data;
1660
1661   _dbus_verbose ("d = %p\n", d);
1662
1663   /* d->pending should be either freed or still
1664    * in the list of pending replies (owned by someone
1665    * else)
1666    */
1667
1668   dbus_free (d);
1669 }
1670
1671 /*
1672  * Record that a reply is allowed; return TRUE on success.
1673  */
1674 dbus_bool_t
1675 bus_connections_expect_reply (BusConnections  *connections,
1676                               BusTransaction  *transaction,
1677                               DBusConnection  *will_get_reply,
1678                               DBusConnection  *will_send_reply,
1679                               DBusMessage     *reply_to_this,
1680                               DBusError       *error)
1681 {
1682   BusPendingReply *pending;
1683   dbus_uint32_t reply_serial;
1684   DBusList *link;
1685   CancelPendingReplyData *cprd;
1686   int count;
1687
1688   _dbus_assert (will_get_reply != NULL);
1689   _dbus_assert (will_send_reply != NULL);
1690   _dbus_assert (reply_to_this != NULL);
1691
1692   if (dbus_message_get_no_reply (reply_to_this))
1693     return TRUE; /* we won't allow a reply, since client doesn't care for one. */
1694
1695   reply_serial = dbus_message_get_serial (reply_to_this);
1696
1697   link = bus_expire_list_get_first_link (connections->pending_replies);
1698   count = 0;
1699   while (link != NULL)
1700     {
1701       pending = link->data;
1702
1703       if (pending->reply_serial == reply_serial &&
1704           pending->will_get_reply == will_get_reply &&
1705           pending->will_send_reply == will_send_reply)
1706         {
1707           dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1708                           "Message has the same reply serial as a currently-outstanding existing method call");
1709           return FALSE;
1710         }
1711
1712       link = bus_expire_list_get_next_link (connections->pending_replies,
1713                                             link);
1714       if (pending->will_get_reply == will_get_reply)
1715         ++count;
1716     }
1717
1718   if (count >=
1719       bus_context_get_max_replies_per_connection (connections->context))
1720     {
1721       dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
1722                       "The maximum number of pending replies per connection has been reached");
1723       return FALSE;
1724     }
1725
1726   pending = dbus_new0 (BusPendingReply, 1);
1727   if (pending == NULL)
1728     {
1729       BUS_SET_OOM (error);
1730       return FALSE;
1731     }
1732
1733 #ifdef DBUS_ENABLE_VERBOSE_MODE
1734   /* so we can see a not-yet-added pending reply */
1735   pending->expire_item.added_tv_sec = 1;
1736   pending->expire_item.added_tv_usec = 1;
1737 #endif
1738
1739   pending->will_get_reply = will_get_reply;
1740   pending->will_send_reply = will_send_reply;
1741   pending->reply_serial = reply_serial;
1742
1743   cprd = dbus_new0 (CancelPendingReplyData, 1);
1744   if (cprd == NULL)
1745     {
1746       BUS_SET_OOM (error);
1747       bus_pending_reply_free (pending);
1748       return FALSE;
1749     }
1750
1751   if (!bus_expire_list_add (connections->pending_replies,
1752                             &pending->expire_item))
1753     {
1754       BUS_SET_OOM (error);
1755       dbus_free (cprd);
1756       bus_pending_reply_free (pending);
1757       return FALSE;
1758     }
1759
1760   if (!bus_transaction_add_cancel_hook (transaction,
1761                                         cancel_pending_reply,
1762                                         cprd,
1763                                         cancel_pending_reply_data_free))
1764     {
1765       BUS_SET_OOM (error);
1766       bus_expire_list_remove (connections->pending_replies, &pending->expire_item);
1767       dbus_free (cprd);
1768       bus_pending_reply_free (pending);
1769       return FALSE;
1770     }
1771
1772   cprd->pending = pending;
1773   cprd->connections = connections;
1774
1775   _dbus_get_monotonic_time (&pending->expire_item.added_tv_sec,
1776                             &pending->expire_item.added_tv_usec);
1777
1778   _dbus_verbose ("Added pending reply %p, replier %p receiver %p serial %u\n",
1779                  pending,
1780                  pending->will_send_reply,
1781                  pending->will_get_reply,
1782                  pending->reply_serial);
1783
1784   return TRUE;
1785 }
1786
1787 typedef struct
1788 {
1789   DBusList        *link;
1790   BusConnections  *connections;
1791 } CheckPendingReplyData;
1792
1793 static void
1794 cancel_check_pending_reply (void *data)
1795 {
1796   CheckPendingReplyData *d = data;
1797
1798   _dbus_verbose ("d = %p\n",d);
1799
1800   bus_expire_list_add_link (d->connections->pending_replies,
1801                             d->link);
1802   d->link = NULL;
1803 }
1804
1805 static void
1806 check_pending_reply_data_free (void *data)
1807 {
1808   CheckPendingReplyData *d = data;
1809
1810   _dbus_verbose ("d = %p\n",d);
1811
1812   if (d->link != NULL)
1813     {
1814       BusPendingReply *pending = d->link->data;
1815
1816       _dbus_assert (!bus_expire_list_contains_item (d->connections->pending_replies,
1817                                                     &pending->expire_item));
1818
1819       bus_pending_reply_free (pending);
1820       _dbus_list_free_link (d->link);
1821     }
1822
1823   dbus_free (d);
1824 }
1825
1826 /*
1827  * Check whether a reply is allowed, remove BusPendingReply
1828  * if so, return TRUE if so.
1829  */
1830 dbus_bool_t
1831 bus_connections_check_reply (BusConnections *connections,
1832                              BusTransaction *transaction,
1833                              DBusConnection *sending_reply,
1834                              DBusConnection *receiving_reply,
1835                              DBusMessage    *reply,
1836                              DBusError      *error)
1837 {
1838   CheckPendingReplyData *cprd;
1839   DBusList *link;
1840   dbus_uint32_t reply_serial;
1841
1842   _dbus_assert (sending_reply != NULL);
1843   _dbus_assert (receiving_reply != NULL);
1844
1845   reply_serial = dbus_message_get_reply_serial (reply);
1846
1847   link = bus_expire_list_get_first_link (connections->pending_replies);
1848   while (link != NULL)
1849     {
1850       BusPendingReply *pending = link->data;
1851
1852       if (pending->reply_serial == reply_serial &&
1853           pending->will_get_reply == receiving_reply &&
1854           pending->will_send_reply == sending_reply)
1855         {
1856           _dbus_verbose ("Found pending reply with serial %u\n", reply_serial);
1857           break;
1858         }
1859
1860       link = bus_expire_list_get_next_link (connections->pending_replies,
1861                                             link);
1862     }
1863
1864   if (link == NULL)
1865     {
1866       _dbus_verbose ("No pending reply expected\n");
1867
1868       return FALSE;
1869     }
1870
1871   cprd = dbus_new0 (CheckPendingReplyData, 1);
1872   if (cprd == NULL)
1873     {
1874       BUS_SET_OOM (error);
1875       return FALSE;
1876     }
1877
1878   if (!bus_transaction_add_cancel_hook (transaction,
1879                                         cancel_check_pending_reply,
1880                                         cprd,
1881                                         check_pending_reply_data_free))
1882     {
1883       BUS_SET_OOM (error);
1884       dbus_free (cprd);
1885       return FALSE;
1886     }
1887
1888   cprd->link = link;
1889   cprd->connections = connections;
1890
1891   bus_expire_list_unlink (connections->pending_replies,
1892                           link);
1893
1894   _dbus_assert (!bus_expire_list_contains_item (connections->pending_replies, link->data));
1895
1896   return TRUE;
1897 }
1898
1899 /*
1900  * Transactions
1901  *
1902  * Note that this is fairly fragile; in particular, don't try to use
1903  * one transaction across any main loop iterations.
1904  */
1905
1906 typedef struct
1907 {
1908   BusTransaction *transaction;
1909   DBusMessage    *message;
1910   DBusPreallocatedSend *preallocated;
1911 } MessageToSend;
1912
1913 typedef struct
1914 {
1915   BusTransactionCancelFunction cancel_function;
1916   DBusFreeFunction free_data_function;
1917   void *data;
1918 } CancelHook;
1919
1920 struct BusTransaction
1921 {
1922   DBusList *connections;
1923   BusContext *context;
1924   DBusList *cancel_hooks;
1925 };
1926
1927 static void
1928 message_to_send_free (DBusConnection *connection,
1929                       MessageToSend  *to_send)
1930 {
1931   if (to_send->message)
1932     dbus_message_unref (to_send->message);
1933
1934   if (to_send->preallocated)
1935     dbus_connection_free_preallocated_send (connection, to_send->preallocated);
1936
1937   dbus_free (to_send);
1938 }
1939
1940 static void
1941 cancel_hook_cancel (void *element,
1942                     void *data)
1943 {
1944   CancelHook *ch = element;
1945
1946   _dbus_verbose ("Running transaction cancel hook\n");
1947
1948   if (ch->cancel_function)
1949     (* ch->cancel_function) (ch->data);
1950 }
1951
1952 static void
1953 cancel_hook_free (void *element,
1954                   void *data)
1955 {
1956   CancelHook *ch = element;
1957
1958   if (ch->free_data_function)
1959     (* ch->free_data_function) (ch->data);
1960
1961   dbus_free (ch);
1962 }
1963
1964 static void
1965 free_cancel_hooks (BusTransaction *transaction)
1966 {
1967   _dbus_list_foreach (&transaction->cancel_hooks,
1968                       cancel_hook_free, NULL);
1969
1970   _dbus_list_clear (&transaction->cancel_hooks);
1971 }
1972
1973 BusTransaction*
1974 bus_transaction_new (BusContext *context)
1975 {
1976   BusTransaction *transaction;
1977
1978   transaction = dbus_new0 (BusTransaction, 1);
1979   if (transaction == NULL)
1980     return NULL;
1981
1982   transaction->context = context;
1983
1984   return transaction;
1985 }
1986
1987 BusContext*
1988 bus_transaction_get_context (BusTransaction  *transaction)
1989 {
1990   return transaction->context;
1991 }
1992
1993 BusConnections*
1994 bus_transaction_get_connections (BusTransaction  *transaction)
1995 {
1996   return bus_context_get_connections (transaction->context);
1997 }
1998
1999 dbus_bool_t
2000 bus_transaction_send_from_driver (BusTransaction *transaction,
2001                                   DBusConnection *connection,
2002                                   DBusMessage    *message)
2003 {
2004   /* We have to set the sender to the driver, and have
2005    * to check security policy since it was not done in
2006    * dispatch.c
2007    */
2008   _dbus_verbose ("Sending %s %s %s from driver\n",
2009                  dbus_message_get_interface (message) ?
2010                  dbus_message_get_interface (message) : "(no interface)",
2011                  dbus_message_get_member (message) ?
2012                  dbus_message_get_member (message) : "(no member)",
2013                  dbus_message_get_error_name (message) ?
2014                  dbus_message_get_error_name (message) : "(no error name)");
2015
2016   if (!dbus_message_set_sender (message, DBUS_SERVICE_DBUS))
2017     return FALSE;
2018
2019   if (bus_connection_is_active (connection))
2020     {
2021       if (!dbus_message_set_destination (message,
2022                                          bus_connection_get_name (connection)))
2023         return FALSE;
2024     }
2025
2026   /* bus driver never wants a reply */
2027   dbus_message_set_no_reply (message, TRUE);
2028
2029   /* If security policy doesn't allow the message, we silently
2030    * eat it; the driver doesn't care about getting a reply.
2031    */
2032   if (!bus_context_check_security_policy (bus_transaction_get_context (transaction),
2033                                           transaction,
2034                                           NULL, connection, connection, message, NULL))
2035     return TRUE;
2036
2037   return bus_transaction_send (transaction, connection, message);
2038 }
2039
2040 dbus_bool_t
2041 bus_transaction_send (BusTransaction *transaction,
2042                       DBusConnection *connection,
2043                       DBusMessage    *message)
2044 {
2045   MessageToSend *to_send;
2046   BusConnectionData *d;
2047   DBusList *link;
2048
2049   _dbus_verbose ("  trying to add %s interface=%s member=%s error=%s to transaction%s\n",
2050                  dbus_message_get_type (message) == DBUS_MESSAGE_TYPE_ERROR ? "error" :
2051                  dbus_message_get_reply_serial (message) != 0 ? "reply" :
2052                  "message",
2053                  dbus_message_get_interface (message) ?
2054                  dbus_message_get_interface (message) : "(unset)",
2055                  dbus_message_get_member (message) ?
2056                  dbus_message_get_member (message) : "(unset)",
2057                  dbus_message_get_error_name (message) ?
2058                  dbus_message_get_error_name (message) : "(unset)",
2059                  dbus_connection_get_is_connected (connection) ?
2060                  "" : " (disconnected)");
2061
2062   _dbus_assert (dbus_message_get_sender (message) != NULL);
2063
2064   if (!dbus_connection_get_is_connected (connection))
2065     return TRUE; /* silently ignore disconnected connections */
2066
2067   d = BUS_CONNECTION_DATA (connection);
2068   _dbus_assert (d != NULL);
2069
2070   to_send = dbus_new (MessageToSend, 1);
2071   if (to_send == NULL)
2072     {
2073       return FALSE;
2074     }
2075
2076   to_send->preallocated = dbus_connection_preallocate_send (connection);
2077   if (to_send->preallocated == NULL)
2078     {
2079       dbus_free (to_send);
2080       return FALSE;
2081     }
2082
2083   dbus_message_ref (message);
2084   to_send->message = message;
2085   to_send->transaction = transaction;
2086
2087   _dbus_verbose ("about to prepend message\n");
2088
2089   if (!_dbus_list_prepend (&d->transaction_messages, to_send))
2090     {
2091       message_to_send_free (connection, to_send);
2092       return FALSE;
2093     }
2094
2095   _dbus_verbose ("prepended message\n");
2096
2097   /* See if we already had this connection in the list
2098    * for this transaction. If we have a pending message,
2099    * then we should already be in transaction->connections
2100    */
2101   link = _dbus_list_get_first_link (&d->transaction_messages);
2102   _dbus_assert (link->data == to_send);
2103   link = _dbus_list_get_next_link (&d->transaction_messages, link);
2104   while (link != NULL)
2105     {
2106       MessageToSend *m = link->data;
2107       DBusList *next = _dbus_list_get_next_link (&d->transaction_messages, link);
2108
2109       if (m->transaction == transaction)
2110         break;
2111
2112       link = next;
2113     }
2114
2115   if (link == NULL)
2116     {
2117       if (!_dbus_list_prepend (&transaction->connections, connection))
2118         {
2119           _dbus_list_remove (&d->transaction_messages, to_send);
2120           message_to_send_free (connection, to_send);
2121           return FALSE;
2122         }
2123     }
2124
2125   return TRUE;
2126 }
2127
2128 static void
2129 connection_cancel_transaction (DBusConnection *connection,
2130                                BusTransaction *transaction)
2131 {
2132   DBusList *link;
2133   BusConnectionData *d;
2134
2135   d = BUS_CONNECTION_DATA (connection);
2136   _dbus_assert (d != NULL);
2137
2138   link = _dbus_list_get_first_link (&d->transaction_messages);
2139   while (link != NULL)
2140     {
2141       MessageToSend *m = link->data;
2142       DBusList *next = _dbus_list_get_next_link (&d->transaction_messages, link);
2143
2144       if (m->transaction == transaction)
2145         {
2146           _dbus_list_remove_link (&d->transaction_messages,
2147                                   link);
2148
2149           message_to_send_free (connection, m);
2150         }
2151
2152       link = next;
2153     }
2154 }
2155
2156 void
2157 bus_transaction_cancel_and_free (BusTransaction *transaction)
2158 {
2159   DBusConnection *connection;
2160
2161   _dbus_verbose ("TRANSACTION: cancelled\n");
2162
2163   while ((connection = _dbus_list_pop_first (&transaction->connections)))
2164     connection_cancel_transaction (connection, transaction);
2165
2166   _dbus_assert (transaction->connections == NULL);
2167
2168   _dbus_list_foreach (&transaction->cancel_hooks,
2169                       cancel_hook_cancel, NULL);
2170
2171   free_cancel_hooks (transaction);
2172
2173   dbus_free (transaction);
2174 }
2175
2176 static void
2177 connection_execute_transaction (DBusConnection *connection,
2178                                 BusTransaction *transaction)
2179 {
2180   DBusList *link;
2181   BusConnectionData *d;
2182
2183   d = BUS_CONNECTION_DATA (connection);
2184   _dbus_assert (d != NULL);
2185
2186   /* Send the queue in order (FIFO) */
2187   link = _dbus_list_get_last_link (&d->transaction_messages);
2188   while (link != NULL)
2189     {
2190       MessageToSend *m = link->data;
2191       DBusList *prev = _dbus_list_get_prev_link (&d->transaction_messages, link);
2192
2193       if (m->transaction == transaction)
2194         {
2195           _dbus_list_remove_link (&d->transaction_messages,
2196                                   link);
2197
2198           _dbus_assert (dbus_message_get_sender (m->message) != NULL);
2199
2200           dbus_connection_send_preallocated (connection,
2201                                              m->preallocated,
2202                                              m->message,
2203                                              NULL);
2204
2205           m->preallocated = NULL; /* so we don't double-free it */
2206
2207           message_to_send_free (connection, m);
2208         }
2209
2210       link = prev;
2211     }
2212 }
2213
2214 void
2215 bus_transaction_execute_and_free (BusTransaction *transaction)
2216 {
2217   /* For each connection in transaction->connections
2218    * send the messages
2219    */
2220   DBusConnection *connection;
2221
2222   _dbus_verbose ("TRANSACTION: executing\n");
2223
2224   while ((connection = _dbus_list_pop_first (&transaction->connections)))
2225     connection_execute_transaction (connection, transaction);
2226
2227   _dbus_assert (transaction->connections == NULL);
2228
2229   free_cancel_hooks (transaction);
2230
2231   dbus_free (transaction);
2232 }
2233
2234 static void
2235 bus_connection_remove_transactions (DBusConnection *connection)
2236 {
2237   MessageToSend *to_send;
2238   BusConnectionData *d;
2239
2240   d = BUS_CONNECTION_DATA (connection);
2241   _dbus_assert (d != NULL);
2242
2243   while ((to_send = _dbus_list_get_first (&d->transaction_messages)))
2244     {
2245       /* only has an effect for the first MessageToSend listing this transaction */
2246       _dbus_list_remove (&to_send->transaction->connections,
2247                          connection);
2248
2249       _dbus_list_remove (&d->transaction_messages, to_send);
2250       message_to_send_free (connection, to_send);
2251     }
2252 }
2253
2254 /**
2255  * Converts the DBusError to a message reply
2256  */
2257 dbus_bool_t
2258 bus_transaction_send_error_reply (BusTransaction  *transaction,
2259                                   DBusConnection  *connection,
2260                                   const DBusError *error,
2261                                   DBusMessage     *in_reply_to)
2262 {
2263   DBusMessage *reply;
2264
2265   _dbus_assert (error != NULL);
2266   _DBUS_ASSERT_ERROR_IS_SET (error);
2267
2268   _dbus_verbose ("Sending error reply %s \"%s\"\n",
2269                  error->name, error->message);
2270
2271   reply = dbus_message_new_error (in_reply_to,
2272                                   error->name,
2273                                   error->message);
2274   if (reply == NULL)
2275     return FALSE;
2276
2277   if (!bus_transaction_send_from_driver (transaction, connection, reply))
2278     {
2279       dbus_message_unref (reply);
2280       return FALSE;
2281     }
2282
2283   dbus_message_unref (reply);
2284
2285   return TRUE;
2286 }
2287
2288 dbus_bool_t
2289 bus_transaction_add_cancel_hook (BusTransaction               *transaction,
2290                                  BusTransactionCancelFunction  cancel_function,
2291                                  void                         *data,
2292                                  DBusFreeFunction              free_data_function)
2293 {
2294   CancelHook *ch;
2295
2296   ch = dbus_new (CancelHook, 1);
2297   if (ch == NULL)
2298     return FALSE;
2299
2300   _dbus_verbose ("     adding cancel hook function = %p data = %p\n",
2301                  cancel_function, data);
2302
2303   ch->cancel_function = cancel_function;
2304   ch->data = data;
2305   ch->free_data_function = free_data_function;
2306
2307   /* It's important that the hooks get run in reverse order that they
2308    * were added
2309    */
2310   if (!_dbus_list_prepend (&transaction->cancel_hooks, ch))
2311     {
2312       dbus_free (ch);
2313       return FALSE;
2314     }
2315
2316   return TRUE;
2317 }
2318
2319 #ifdef DBUS_ENABLE_STATS
2320 int
2321 bus_connections_get_n_active (BusConnections *connections)
2322 {
2323   return connections->n_completed;
2324 }
2325
2326 int
2327 bus_connections_get_n_incomplete (BusConnections *connections)
2328 {
2329   return connections->n_incomplete;
2330 }
2331
2332 int
2333 bus_connections_get_total_match_rules (BusConnections *connections)
2334 {
2335   return connections->total_match_rules;
2336 }
2337
2338 int
2339 bus_connections_get_peak_match_rules (BusConnections *connections)
2340 {
2341   return connections->peak_match_rules;
2342 }
2343
2344 int
2345 bus_connections_get_peak_match_rules_per_conn (BusConnections *connections)
2346 {
2347   return connections->peak_match_rules_per_conn;
2348 }
2349
2350 int
2351 bus_connections_get_total_bus_names (BusConnections *connections)
2352 {
2353   return connections->total_bus_names;
2354 }
2355
2356 int
2357 bus_connections_get_peak_bus_names (BusConnections *connections)
2358 {
2359   return connections->peak_bus_names;
2360 }
2361
2362 int
2363 bus_connections_get_peak_bus_names_per_conn (BusConnections *connections)
2364 {
2365   return connections->peak_bus_names_per_conn;
2366 }
2367
2368 int
2369 bus_connection_get_peak_match_rules (DBusConnection *connection)
2370 {
2371   BusConnectionData *d;
2372
2373   d = BUS_CONNECTION_DATA (connection);
2374   return d->peak_match_rules;
2375 }
2376
2377 int
2378 bus_connection_get_peak_bus_names (DBusConnection *connection)
2379 {
2380   BusConnectionData *d;
2381
2382   d = BUS_CONNECTION_DATA (connection);
2383   return d->peak_bus_names;
2384 }
2385 #endif /* DBUS_ENABLE_STATS */