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dbus-server.c

/* -*- mode: C; c-file-style: "gnu" -*- */
/* dbus-server.c DBusServer object
 *
 * Copyright (C) 2002, 2003, 2004 Red Hat Inc.
 *
 * Licensed under the Academic Free License version 2.1
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */ 

#include "dbus-server.h"
#include "dbus-server-unix.h"
#include "dbus-string.h"
#ifdef DBUS_BUILD_TESTS
#include "dbus-server-debug-pipe.h"
#endif
#include "dbus-address.h"
#include "dbus-protocol.h"

/**
 * @defgroup DBusServer DBusServer
 * @ingroup  DBus
 * @brief Server that listens for new connections.
 *
 * Types and functions related to DBusServer.
 * A DBusServer represents a server that other applications
 * can connect to. Each connection from another application
 * is represented by a DBusConnection.
 *
 * @todo Thread safety hasn't been looked at for #DBusServer
 * @todo Need notification to apps of disconnection, may matter for some transports
 */

/**
 * @defgroup DBusServerInternals DBusServer implementation details
 * @ingroup  DBusInternals
 * @brief Implementation details of DBusServer
 *
 * @{
 */

/**
 * Initializes the members of the DBusServer base class.
 * Chained up to by subclass constructors.
 *
 * @param server the server.
 * @param vtable the vtable for the subclass.
 * @param address the server's address
 * @returns #TRUE on success.
 */
dbus_bool_t
00065 _dbus_server_init_base (DBusServer             *server,
                        const DBusServerVTable *vtable,
                        const DBusString       *address)
{
  server->vtable = vtable;
  server->refcount.value = 1;

  server->address = NULL;
  server->watches = NULL;
  server->timeouts = NULL;
  
  if (!_dbus_string_copy_data (address, &server->address))
    goto failed;

  server->mutex = dbus_mutex_new ();
  if (server->mutex == NULL)
    goto failed;
  
  server->watches = _dbus_watch_list_new ();
  if (server->watches == NULL)
    goto failed;

  server->timeouts = _dbus_timeout_list_new ();
  if (server->timeouts == NULL)
    goto failed;

  _dbus_data_slot_list_init (&server->slot_list);

  _dbus_verbose ("Initialized server on address %s\n", server->address);
  
  return TRUE;

 failed:
  if (server->mutex)
    {
      dbus_mutex_free (server->mutex);
      server->mutex = NULL;
    }
  if (server->watches)
    {
      _dbus_watch_list_free (server->watches);
      server->watches = NULL;
    }
  if (server->timeouts)
    {
      _dbus_timeout_list_free (server->timeouts);
      server->timeouts = NULL;
    }
  if (server->address)
    {
      dbus_free (server->address);
      server->address = NULL;
    }
  
  return FALSE;
}

/**
 * Finalizes the members of the DBusServer base class.
 * Chained up to by subclass finalizers.
 *
 * @param server the server.
 */
void
00129 _dbus_server_finalize_base (DBusServer *server)
{  
  /* calls out to application code... */
  _dbus_data_slot_list_free (&server->slot_list);

  dbus_server_set_new_connection_function (server, NULL, NULL, NULL);

  if (!server->disconnected)
    dbus_server_disconnect (server);

  _dbus_watch_list_free (server->watches);
  _dbus_timeout_list_free (server->timeouts);

  dbus_mutex_free (server->mutex);
  
  dbus_free (server->address);

  dbus_free_string_array (server->auth_mechanisms);
}

/**
 * Adds a watch for this server, chaining out to application-provided
 * watch handlers.
 *
 * @param server the server.
 * @param watch the watch to add.
 */
dbus_bool_t
00157 _dbus_server_add_watch (DBusServer *server,
                        DBusWatch  *watch)
{
  HAVE_LOCK_CHECK (server);
  return _dbus_watch_list_add_watch (server->watches, watch);
}

/**
 * Removes a watch previously added with _dbus_server_remove_watch().
 *
 * @param server the server.
 * @param watch the watch to remove.
 */
void
00171 _dbus_server_remove_watch  (DBusServer *server,
                            DBusWatch  *watch)
{
  HAVE_LOCK_CHECK (server);
  _dbus_watch_list_remove_watch (server->watches, watch);
}

/**
 * Toggles a watch and notifies app via server's
 * DBusWatchToggledFunction if available. It's an error to call this
 * function on a watch that was not previously added.
 *
 * @param server the server.
 * @param watch the watch to toggle.
 * @param enabled whether to enable or disable
 */
void
00188 _dbus_server_toggle_watch (DBusServer  *server,
                           DBusWatch   *watch,
                           dbus_bool_t  enabled)
{
  HAVE_LOCK_CHECK (server);
  
  if (server->watches) /* null during finalize */
    _dbus_watch_list_toggle_watch (server->watches,
                                   watch, enabled);
}

/**
 * Adds a timeout for this server, chaining out to
 * application-provided timeout handlers. The timeout should be
 * repeatedly handled with dbus_timeout_handle() at its given interval
 * until it is removed.
 *
 * @param server the server.
 * @param timeout the timeout to add.
 */
dbus_bool_t
00209 _dbus_server_add_timeout (DBusServer  *server,
                    DBusTimeout *timeout)
{
  HAVE_LOCK_CHECK (server);
  
  return _dbus_timeout_list_add_timeout (server->timeouts, timeout);
}

/**
 * Removes a timeout previously added with _dbus_server_add_timeout().
 *
 * @param server the server.
 * @param timeout the timeout to remove.
 */
void
00224 _dbus_server_remove_timeout (DBusServer  *server,
                       DBusTimeout *timeout)
{
  HAVE_LOCK_CHECK (server);
  
  _dbus_timeout_list_remove_timeout (server->timeouts, timeout);  
}

/**
 * Toggles a timeout and notifies app via server's
 * DBusTimeoutToggledFunction if available. It's an error to call this
 * function on a timeout that was not previously added.
 *
 * @param server the server.
 * @param timeout the timeout to toggle.
 * @param enabled whether to enable or disable
 */
void
00242 _dbus_server_toggle_timeout (DBusServer  *server,
                             DBusTimeout *timeout,
                             dbus_bool_t  enabled)
{
  HAVE_LOCK_CHECK (server);
  
  if (server->timeouts) /* null during finalize */
    _dbus_timeout_list_toggle_timeout (server->timeouts,
                                       timeout, enabled);
}


/** @} */

/**
 * @addtogroup DBusServer
 *
 * @{
 */


/**
 * @typedef DBusServer
 *
 * An opaque object representing a server that listens for
 * connections from other applications. Each time a connection
 * is made, a new DBusConnection is created and made available
 * via an application-provided DBusNewConnectionFunction.
 * The DBusNewConnectionFunction is provided with
 * dbus_server_set_new_connection_function().
 * 
 */

/**
 * Listens for new connections on the given address.
 * Returns #NULL if listening fails for any reason.
 * Otherwise returns a new #DBusServer.
 * dbus_server_set_new_connection_function() and
 * dbus_server_set_watch_functions() should be called
 * immediately to render the server fully functional.
 *
 * @todo error messages on bad address could really be better.
 * DBusResultCode is a bit limiting here.
 *
 * @param address the address of this server.
 * @param error location to store rationale for failure.
 * @returns a new DBusServer, or #NULL on failure.
 * 
 */
DBusServer*
00292 dbus_server_listen (const char     *address,
                    DBusError      *error)
{
  DBusServer *server;
  DBusAddressEntry **entries;
  int len, i;
  const char *address_problem_type;
  const char *address_problem_field;
  const char *address_problem_other;

  _dbus_return_val_if_fail (address != NULL, NULL);
  _dbus_return_val_if_error_is_set (error, NULL);
  
  if (!dbus_parse_address (address, &entries, &len, error))
    return NULL;

  server = NULL;
  address_problem_type = NULL;
  address_problem_field = NULL;
  address_problem_other = NULL;
  
  for (i = 0; i < len; i++)
    {
      const char *method = dbus_address_entry_get_method (entries[i]);

      if (strcmp (method, "unix") == 0)
      {
        const char *path = dbus_address_entry_get_value (entries[i], "path");
          const char *tmpdir = dbus_address_entry_get_value (entries[i], "tmpdir");
          const char *abstract = dbus_address_entry_get_value (entries[i], "abstract");
          
        if (path == NULL && tmpdir == NULL && abstract == NULL)
            {
              address_problem_type = "unix";
              address_problem_field = "path or tmpdir or abstract";
              goto bad_address;
            }

          if ((path && tmpdir) ||
              (path && abstract) ||
              (tmpdir && abstract))
            {
              address_problem_other = "cannot specify two of \"path\" and \"tmpdir\" and \"abstract\" at the same time";
              goto bad_address;
            }

          if (tmpdir != NULL)
            {
              DBusString full_path;
              DBusString filename;
              
              if (!_dbus_string_init (&full_path))
                {
                  dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
                  goto out;
                }
                  
              if (!_dbus_string_init (&filename))
                {
                  _dbus_string_free (&full_path);
                  dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
                  goto out;
                }
              
              if (!_dbus_string_append (&filename,
                                        "dbus-") ||
                  !_dbus_generate_random_ascii (&filename, 10) ||
                  !_dbus_string_append (&full_path, tmpdir) ||
                  !_dbus_concat_dir_and_file (&full_path, &filename))
                {
                  _dbus_string_free (&full_path);
                  _dbus_string_free (&filename);
                  dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
                  goto out;
                }
              
              /* FIXME - we will unconditionally unlink() the path if
               * we don't support abstract namespace.  unlink() does
               * not follow symlinks, but would like independent
               * confirmation this is safe enough. See also
               * _dbus_listen_unix_socket() and comments therein.
               */

              /* Always use abstract namespace if possible with tmpdir */
              
              server =
                _dbus_server_new_for_domain_socket (_dbus_string_get_const_data (&full_path),
#ifdef HAVE_ABSTRACT_SOCKETS
                                                    TRUE,
#else
                                                    FALSE,
#endif
                                                    error);

              _dbus_string_free (&full_path);
              _dbus_string_free (&filename);
            }
          else
            {
              if (path)
                server = _dbus_server_new_for_domain_socket (path, FALSE, error);
              else
                server = _dbus_server_new_for_domain_socket (abstract, TRUE, error);
            }
      }
      else if (strcmp (method, "tcp") == 0)
      {
        const char *host = dbus_address_entry_get_value (entries[i], "host");
          const char *port = dbus_address_entry_get_value (entries[i], "port");
          DBusString  str;
          long lport;
          dbus_bool_t sresult;
          
        if (port == NULL)
            {
              address_problem_type = "tcp";
              address_problem_field = "port";
              goto bad_address;
            }

          _dbus_string_init_const (&str, port);
          sresult = _dbus_string_parse_int (&str, 0, &lport, NULL);
          _dbus_string_free (&str);
          
          if (sresult == FALSE || lport <= 0 || lport > 65535)
            {
              address_problem_other = "Port is not an integer between 0 and 65535";
              goto bad_address;
            }
          
        server = _dbus_server_new_for_tcp_socket (host, lport, error);

        if (server)
          break;
      }
#ifdef DBUS_BUILD_TESTS
      else if (strcmp (method, "debug-pipe") == 0)
      {
        const char *name = dbus_address_entry_get_value (entries[i], "name");

        if (name == NULL)
            {
              address_problem_type = "debug-pipe";
              address_problem_field = "name";
              goto bad_address;
            }

        server = _dbus_server_debug_pipe_new (name, error);
      }
#endif
      else
        {
          address_problem_other = "Unknown address type (examples of valid types are \"unix\" and \"tcp\")";
          goto bad_address;
        }
      
      if (server)
        break;
    }

 out:
  
  dbus_address_entries_free (entries);
  return server;

 bad_address:
  dbus_address_entries_free (entries);
  if (address_problem_type != NULL)
    dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
                    "Server address of type %s was missing argument %s",
                    address_problem_type, address_problem_field);
  else
    dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
                    "Could not parse server address: %s",
                    address_problem_other);

  return NULL;
}

/**
 * Increments the reference count of a DBusServer.
 *
 * @param server the server.
 * @returns the server
 */
DBusServer *
00478 dbus_server_ref (DBusServer *server)
{
  _dbus_return_val_if_fail (server != NULL, NULL);

#ifdef DBUS_HAVE_ATOMIC_INT
  _dbus_atomic_inc (&server->refcount);
#else
  SERVER_LOCK (server);
  _dbus_assert (server->refcount.value > 0);

  server->refcount.value += 1;
  SERVER_UNLOCK (server);
#endif

  return server;
}

/**
 * Decrements the reference count of a DBusServer.  Finalizes the
 * server if the reference count reaches zero. The server connection
 * will be closed as with dbus_server_disconnect() when the server is
 * finalized.
 *
 * @param server the server.
 */
void
00504 dbus_server_unref (DBusServer *server)
{
  dbus_bool_t last_unref;
  
  _dbus_return_if_fail (server != NULL);

#ifdef DBUS_HAVE_ATOMIC_INT
  last_unref = (_dbus_atomic_dec (&server->refcount) == 1);
#else
  SERVER_LOCK (server);
  
  _dbus_assert (server->refcount.value > 0);

  server->refcount.value -= 1;
  last_unref = (server->refcount.value == 0);
  
  SERVER_UNLOCK (server);
#endif
  
  if (last_unref)
    {
      _dbus_assert (server->vtable->finalize != NULL);
      
      (* server->vtable->finalize) (server);
    }
}

/**
 * Like dbus_server_ref() but does not acquire the lock (must already be held)
 *
 * @param server the server.
 */
void
00537 _dbus_server_ref_unlocked (DBusServer *server)
{
  HAVE_LOCK_CHECK (server);

#ifdef DBUS_HAVE_ATOMIC_INT
  _dbus_atomic_inc (&server->refcount);
#else
  _dbus_assert (server->refcount.value > 0);

  server->refcount.value += 1;
#endif
}

/**
 * Releases the server's address and stops listening for
 * new clients. If called more than once, only the first
 * call has an effect. Does not modify the server's
 * reference count.
 * 
 * @param server the server.
 */
void
00559 dbus_server_disconnect (DBusServer *server)
{
  _dbus_return_if_fail (server != NULL);

  SERVER_LOCK (server);
  
  _dbus_assert (server->vtable->disconnect != NULL);

  if (server->disconnected)
    return;
  
  (* server->vtable->disconnect) (server);
  server->disconnected = TRUE;

  SERVER_UNLOCK (server);
}

/**
 * Returns #TRUE if the server is still listening for new connections.
 *
 * @param server the server.
 */
dbus_bool_t
00582 dbus_server_get_is_connected (DBusServer *server)
{
  dbus_bool_t retval;
  
  _dbus_return_val_if_fail (server != NULL, FALSE);

  SERVER_LOCK (server);
  retval = !server->disconnected;
  SERVER_UNLOCK (server);

  return retval;
}

/**
 * Returns the address of the server, as a newly-allocated
 * string which must be freed by the caller.
 *
 * @param server the server
 * @returns the address or #NULL if no memory
 */
char*
00603 dbus_server_get_address (DBusServer *server)
{
  char *retval;
  
  _dbus_return_val_if_fail (server != NULL, NULL);

  SERVER_LOCK (server);
  retval = _dbus_strdup (server->address);
  SERVER_UNLOCK (server);

  return retval;
}

/**
 * Sets a function to be used for handling new connections.  The given
 * function is passed each new connection as the connection is
 * created. If the new connection function increments the connection's
 * reference count, the connection will stay alive. Otherwise, the
 * connection will be unreferenced and closed.
 *
 * @param server the server.
 * @param function a function to handle new connections.
 * @param data data to pass to the new connection handler.
 * @param free_data_function function to free the data.
 */
void
00629 dbus_server_set_new_connection_function (DBusServer                *server,
                                         DBusNewConnectionFunction  function,
                                         void                      *data,
                                         DBusFreeFunction           free_data_function)
{
  DBusFreeFunction old_free_function;
  void *old_data;
  
  _dbus_return_if_fail (server != NULL);

  SERVER_LOCK (server);
  old_free_function = server->new_connection_free_data_function;
  old_data = server->new_connection_data;
  
  server->new_connection_function = function;
  server->new_connection_data = data;
  server->new_connection_free_data_function = free_data_function;
  SERVER_UNLOCK (server);
    
  if (old_free_function != NULL)
    (* old_free_function) (old_data);
}

/**
 * Sets the watch functions for the connection. These functions are
 * responsible for making the application's main loop aware of file
 * descriptors that need to be monitored for events.
 *
 * This function behaves exactly like dbus_connection_set_watch_functions();
 * see the documentation for that routine.
 *
 * @param server the server.
 * @param add_function function to begin monitoring a new descriptor.
 * @param remove_function function to stop monitoring a descriptor.
 * @param toggled_function function to notify when the watch is enabled/disabled
 * @param data data to pass to add_function and remove_function.
 * @param free_data_function function to be called to free the data.
 * @returns #FALSE on failure (no memory)
 */
dbus_bool_t
00669 dbus_server_set_watch_functions (DBusServer              *server,
                                 DBusAddWatchFunction     add_function,
                                 DBusRemoveWatchFunction  remove_function,
                                 DBusWatchToggledFunction toggled_function,
                                 void                    *data,
                                 DBusFreeFunction         free_data_function)
{
  dbus_bool_t result;
  DBusWatchList *watches;
  
  _dbus_return_val_if_fail (server != NULL, FALSE);

  SERVER_LOCK (server);
  watches = server->watches;
  server->watches = NULL;
  if (watches)
    {
      SERVER_UNLOCK (server);
      result = _dbus_watch_list_set_functions (watches,
                                               add_function,
                                               remove_function,
                                               toggled_function,
                                               data,
                                               free_data_function);
      SERVER_LOCK (server);
    }
  else
    {
      _dbus_warn ("Re-entrant call to %s\n", _DBUS_FUNCTION_NAME);
      result = FALSE;
    }
  server->watches = watches;
  SERVER_UNLOCK (server);
  
  return result;
}

/**
 * Sets the timeout functions for the connection. These functions are
 * responsible for making the application's main loop aware of timeouts.
 *
 * This function behaves exactly like dbus_connection_set_timeout_functions();
 * see the documentation for that routine.
 *
 * @param server the server.
 * @param add_function function to add a timeout.
 * @param remove_function function to remove a timeout.
 * @param toggled_function function to notify when the timeout is enabled/disabled
 * @param data data to pass to add_function and remove_function.
 * @param free_data_function function to be called to free the data.
 * @returns #FALSE on failure (no memory)
 */
dbus_bool_t
00722 dbus_server_set_timeout_functions (DBusServer                *server,
                           DBusAddTimeoutFunction     add_function,
                           DBusRemoveTimeoutFunction  remove_function,
                                   DBusTimeoutToggledFunction toggled_function,
                           void                      *data,
                           DBusFreeFunction           free_data_function)
{
  dbus_bool_t result;
  DBusTimeoutList *timeouts;
  
  _dbus_return_val_if_fail (server != NULL, FALSE);

  SERVER_LOCK (server);
  timeouts = server->timeouts;
  server->timeouts = NULL;
  if (timeouts)
    {
      SERVER_UNLOCK (server);
      result = _dbus_timeout_list_set_functions (timeouts,
                                                 add_function,
                                                 remove_function,
                                                 toggled_function,
                                                 data,
                                                 free_data_function);
      SERVER_LOCK (server);
    }
  else
    {
      _dbus_warn ("Re-entrant call to %s\n", _DBUS_FUNCTION_NAME);
      result = FALSE;
    }
  server->timeouts = timeouts;
  SERVER_UNLOCK (server);
  
  return result;
}

/**
 * Sets the authentication mechanisms that this server offers
 * to clients, as a list of SASL mechanisms. This function
 * only affects connections created *after* it is called.
 * Pass #NULL instead of an array to use all available mechanisms.
 *
 * @param server the server
 * @param mechanisms #NULL-terminated array of mechanisms
 * @returns #FALSE if no memory
 */
dbus_bool_t
00770 dbus_server_set_auth_mechanisms (DBusServer  *server,
                                 const char **mechanisms)
{
  char **copy;

  _dbus_return_val_if_fail (server != NULL, FALSE);

  SERVER_LOCK (server);
  
  if (mechanisms != NULL)
    {
      copy = _dbus_dup_string_array (mechanisms);
      if (copy == NULL)
        return FALSE;
    }
  else
    copy = NULL;

  dbus_free_string_array (server->auth_mechanisms);
  server->auth_mechanisms = copy;

  SERVER_UNLOCK (server);
  
  return TRUE;
}


static DBusDataSlotAllocator slot_allocator;
_DBUS_DEFINE_GLOBAL_LOCK (server_slots);

/**
 * Allocates an integer ID to be used for storing application-specific
 * data on any DBusServer. The allocated ID may then be used
 * with dbus_server_set_data() and dbus_server_get_data().
 * The slot must be initialized with -1. If a nonnegative
 * slot is passed in, the refcount is incremented on that
 * slot, rather than creating a new slot.
 *  
 * The allocated slot is global, i.e. all DBusServer objects will have
 * a slot with the given integer ID reserved.
 *
 * @param slot_p address of global variable storing the slot ID
 * @returns #FALSE on no memory
 */
dbus_bool_t
00815 dbus_server_allocate_data_slot (dbus_int32_t *slot_p)
{
  return _dbus_data_slot_allocator_alloc (&slot_allocator,
                                          _DBUS_LOCK_NAME (server_slots),
                                          slot_p);
}

/**
 * Deallocates a global ID for server data slots.
 * dbus_server_get_data() and dbus_server_set_data()
 * may no longer be used with this slot.
 * Existing data stored on existing DBusServer objects
 * will be freed when the server is finalized,
 * but may not be retrieved (and may only be replaced
 * if someone else reallocates the slot).
 *
 * @param slot_p address of the slot to deallocate
 */
void
00834 dbus_server_free_data_slot (dbus_int32_t *slot_p)
{
  _dbus_return_if_fail (*slot_p >= 0);
  
  _dbus_data_slot_allocator_free (&slot_allocator, slot_p);
}

/**
 * Stores a pointer on a DBusServer, along
 * with an optional function to be used for freeing
 * the data when the data is set again, or when
 * the server is finalized. The slot number
 * must have been allocated with dbus_server_allocate_data_slot().
 *
 * @param server the server
 * @param slot the slot number
 * @param data the data to store
 * @param free_data_func finalizer function for the data
 * @returns #TRUE if there was enough memory to store the data
 */
dbus_bool_t
00855 dbus_server_set_data (DBusServer       *server,
                      int               slot,
                      void             *data,
                      DBusFreeFunction  free_data_func)
{
  DBusFreeFunction old_free_func;
  void *old_data;
  dbus_bool_t retval;

  _dbus_return_val_if_fail (server != NULL, FALSE);

  SERVER_LOCK (server);
  
  retval = _dbus_data_slot_list_set (&slot_allocator,
                                     &server->slot_list,
                                     slot, data, free_data_func,
                                     &old_free_func, &old_data);


  SERVER_UNLOCK (server);
  
  if (retval)
    {
      /* Do the actual free outside the server lock */
      if (old_free_func)
        (* old_free_func) (old_data);
    }

  return retval;
}

/**
 * Retrieves data previously set with dbus_server_set_data().
 * The slot must still be allocated (must not have been freed).
 *
 * @param server the server
 * @param slot the slot to get data from
 * @returns the data, or #NULL if not found
 */
void*
00895 dbus_server_get_data (DBusServer   *server,
                      int           slot)
{
  void *res;

  _dbus_return_val_if_fail (server != NULL, NULL);
  
  SERVER_LOCK (server);
  
  res = _dbus_data_slot_list_get (&slot_allocator,
                                  &server->slot_list,
                                  slot);

  SERVER_UNLOCK (server);
  
  return res;
}

/** @} */

#ifdef DBUS_BUILD_TESTS
#include "dbus-test.h"

dbus_bool_t
_dbus_server_test (void)
{
  const char *valid_addresses[] = {
    "tcp:port=1234",
    "unix:path=./boogie",
    "tcp:host=localhost,port=1234",
    "tcp:host=localhost,port=1234;tcp:port=5678",
    "tcp:port=1234;unix:path=./boogie",
  };

  DBusServer *server;
  int i;
  
  for (i = 0; i < _DBUS_N_ELEMENTS (valid_addresses); i++)
    {
      server = dbus_server_listen (valid_addresses[i], NULL);
      if (server == NULL)
      _dbus_assert_not_reached ("Failed to listen for valid address.");

      dbus_server_unref (server);

      /* Try disconnecting before unreffing */
      server = dbus_server_listen (valid_addresses[i], NULL);
      if (server == NULL)
      _dbus_assert_not_reached ("Failed to listen for valid address.");

      dbus_server_disconnect (server);

      dbus_server_unref (server);
    }

  return TRUE;
}

#endif /* DBUS_BUILD_TESTS */

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