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dbus-transport.c

00001 /* -*- mode: C; c-file-style: "gnu" -*- */
00002 /* dbus-transport.c DBusTransport object (internal to D-BUS implementation)
00003  *
00004  * Copyright (C) 2002, 2003  Red Hat Inc.
00005  *
00006  * Licensed under the Academic Free License version 2.1
00007  * 
00008  * This program is free software; you can redistribute it and/or modify
00009  * it under the terms of the GNU General Public License as published by
00010  * the Free Software Foundation; either version 2 of the License, or
00011  * (at your option) any later version.
00012  *
00013  * This program is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00016  * GNU General Public License for more details.
00017  * 
00018  * You should have received a copy of the GNU General Public License
00019  * along with this program; if not, write to the Free Software
00020  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00021  *
00022  */
00023 
00024 #include "dbus-transport-protected.h"
00025 #include "dbus-transport-unix.h"
00026 #include "dbus-connection-internal.h"
00027 #include "dbus-watch.h"
00028 #include "dbus-auth.h"
00029 #include "dbus-address.h"
00030 #ifdef DBUS_BUILD_TESTS
00031 #include "dbus-server-debug-pipe.h"
00032 #endif
00033 
00055 static void
00056 live_messages_size_notify (DBusCounter *counter,
00057                            void        *user_data)
00058 {
00059   DBusTransport *transport = user_data;
00060 
00061   _dbus_transport_ref (transport);
00062 
00063 #if 0
00064   _dbus_verbose ("Counter value is now %d\n",
00065                  (int) _dbus_counter_get_value (counter));
00066 #endif
00067   
00068   /* disable or re-enable the read watch for the transport if
00069    * required.
00070    */
00071   if (* transport->vtable->live_messages_changed)
00072     (* transport->vtable->live_messages_changed) (transport);
00073 
00074   _dbus_transport_unref (transport);
00075 }
00076 
00087 dbus_bool_t
00088 _dbus_transport_init_base (DBusTransport             *transport,
00089                            const DBusTransportVTable *vtable,
00090                            dbus_bool_t                server,
00091                            const DBusString          *address)
00092 {
00093   DBusMessageLoader *loader;
00094   DBusAuth *auth;
00095   DBusCounter *counter;
00096   char *address_copy;
00097   
00098   loader = _dbus_message_loader_new ();
00099   if (loader == NULL)
00100     return FALSE;
00101   
00102   if (server)
00103     auth = _dbus_auth_server_new ();
00104   else
00105     auth = _dbus_auth_client_new ();
00106   if (auth == NULL)
00107     {
00108       _dbus_message_loader_unref (loader);
00109       return FALSE;
00110     }
00111 
00112   counter = _dbus_counter_new ();
00113   if (counter == NULL)
00114     {
00115       _dbus_auth_unref (auth);
00116       _dbus_message_loader_unref (loader);
00117       return FALSE;
00118     }  
00119   
00120   if (server)
00121     {
00122       _dbus_assert (address == NULL);
00123       address_copy = NULL;
00124     }
00125   else
00126     {
00127       _dbus_assert (address != NULL);
00128 
00129       if (!_dbus_string_copy_data (address, &address_copy))
00130         {
00131           _dbus_counter_unref (counter);
00132           _dbus_auth_unref (auth);
00133           _dbus_message_loader_unref (loader);
00134           return FALSE;
00135         }
00136     }
00137   
00138   transport->refcount = 1;
00139   transport->vtable = vtable;
00140   transport->loader = loader;
00141   transport->auth = auth;
00142   transport->live_messages_size = counter;
00143   transport->authenticated = FALSE;
00144   transport->disconnected = FALSE;
00145   transport->send_credentials_pending = !server;
00146   transport->receive_credentials_pending = server;
00147   transport->is_server = server;
00148   transport->address = address_copy;
00149   
00150   transport->unix_user_function = NULL;
00151   transport->unix_user_data = NULL;
00152   transport->free_unix_user_data = NULL;
00153   
00154   /* Try to default to something that won't totally hose the system,
00155    * but doesn't impose too much of a limitation.
00156    */
00157   transport->max_live_messages_size = _DBUS_ONE_MEGABYTE * 63;
00158   
00159   transport->credentials.pid = -1;
00160   transport->credentials.uid = -1;
00161   transport->credentials.gid = -1;
00162 
00163   _dbus_counter_set_notify (transport->live_messages_size,
00164                             transport->max_live_messages_size,
00165                             live_messages_size_notify,
00166                             transport);
00167 
00168   if (transport->address)
00169     _dbus_verbose ("Initialized transport on address %s\n", transport->address);
00170   
00171   return TRUE;
00172 }
00173 
00180 void
00181 _dbus_transport_finalize_base (DBusTransport *transport)
00182 {
00183   if (!transport->disconnected)
00184     _dbus_transport_disconnect (transport);
00185 
00186   if (transport->free_unix_user_data != NULL)
00187     (* transport->free_unix_user_data) (transport->unix_user_data);
00188   
00189   _dbus_message_loader_unref (transport->loader);
00190   _dbus_auth_unref (transport->auth);
00191   _dbus_counter_set_notify (transport->live_messages_size,
00192                             0, NULL, NULL);
00193   _dbus_counter_unref (transport->live_messages_size);
00194   dbus_free (transport->address);
00195 }
00196 
00208 DBusTransport*
00209 _dbus_transport_open (const char     *address,
00210                       DBusError      *error)
00211 {
00212   DBusTransport *transport;
00213   DBusAddressEntry **entries;
00214   DBusError tmp_error;
00215   DBusError first_error;
00216   int len, i;
00217   const char *address_problem_type;
00218   const char *address_problem_field;
00219   const char *address_problem_other;
00220 
00221   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
00222   
00223   if (!dbus_parse_address (address, &entries, &len, error))
00224     return NULL;
00225 
00226   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
00227   
00228   transport = NULL;
00229   address_problem_type = NULL;
00230   address_problem_field = NULL;
00231   address_problem_other = NULL;
00232 
00233   dbus_error_init (&tmp_error);
00234   dbus_error_init (&first_error);
00235   for (i = 0; i < len; i++)
00236     {
00237       const char *method;
00238 
00239       method = dbus_address_entry_get_method (entries[i]);
00240       
00241       if (strcmp (method, "unix") == 0)
00242         {
00243           const char *path = dbus_address_entry_get_value (entries[i], "path");
00244           const char *tmpdir = dbus_address_entry_get_value (entries[i], "tmpdir");
00245           const char *abstract = dbus_address_entry_get_value (entries[i], "abstract");
00246           
00247           if (tmpdir != NULL)
00248             {
00249               address_problem_other = "cannot use the \"tmpdir\" option for an address to connect to, only in an address to listen on";
00250               goto bad_address;
00251             }
00252           
00253           if (path == NULL && abstract == NULL)
00254             {
00255               address_problem_type = "unix";
00256               address_problem_field = "path or abstract";  
00257               goto bad_address;
00258             }
00259 
00260           if (path != NULL && abstract != NULL)
00261             {
00262               address_problem_other = "can't specify both \"path\" and \"abstract\" options in an address";
00263               goto bad_address;
00264             }
00265 
00266           if (path)
00267             transport = _dbus_transport_new_for_domain_socket (path, FALSE,
00268                                                                &tmp_error);
00269           else
00270             transport = _dbus_transport_new_for_domain_socket (abstract, TRUE,
00271                                                                &tmp_error);
00272         }
00273       else if (strcmp (method, "tcp") == 0)
00274         {
00275           const char *host = dbus_address_entry_get_value (entries[i], "host");
00276           const char *port = dbus_address_entry_get_value (entries[i], "port");
00277           DBusString  str;
00278           long lport;
00279           dbus_bool_t sresult;
00280           
00281           if (port == NULL)
00282             {
00283               address_problem_type = "tcp";
00284               address_problem_field = "port";
00285               goto bad_address;
00286             }
00287 
00288           _dbus_string_init_const (&str, port);
00289           sresult = _dbus_string_parse_int (&str, 0, &lport, NULL);
00290           _dbus_string_free (&str);
00291           
00292           if (sresult == FALSE || lport <= 0 || lport > 65535)
00293             {
00294               address_problem_other = "Port is not an integer between 0 and 65535";
00295               goto bad_address;
00296             }
00297           
00298           transport = _dbus_transport_new_for_tcp_socket (host, lport, &tmp_error);
00299         }
00300 #ifdef DBUS_BUILD_TESTS
00301       else if (strcmp (method, "debug-pipe") == 0)
00302         {
00303           const char *name = dbus_address_entry_get_value (entries[i], "name");
00304 
00305           if (name == NULL)
00306             {
00307               address_problem_type = "debug-pipe";
00308               address_problem_field = "name";
00309               goto bad_address;
00310             }
00311           
00312           transport = _dbus_transport_debug_pipe_new (name, &tmp_error);
00313         }
00314 #endif
00315       else
00316         {
00317           address_problem_other = "Unknown address type (examples of valid types are \"unix\" and \"tcp\")";
00318           goto bad_address;
00319         }
00320 
00321       if (transport)
00322         break;
00323 
00324       _DBUS_ASSERT_ERROR_IS_SET (&tmp_error);
00325       
00326       if (i == 0)
00327         dbus_move_error (&tmp_error, &first_error);
00328       else
00329         dbus_error_free (&tmp_error);
00330     }
00331 
00332   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
00333   _DBUS_ASSERT_ERROR_IS_CLEAR (&tmp_error);
00334   
00335   if (transport == NULL)
00336     {
00337       _DBUS_ASSERT_ERROR_IS_SET (&first_error);
00338       dbus_move_error (&first_error, error);
00339     }
00340   else
00341     {
00342       dbus_error_free (&first_error);
00343     }
00344   
00345   dbus_address_entries_free (entries);
00346   return transport;
00347 
00348  bad_address:
00349   dbus_address_entries_free (entries);
00350 
00351   if (address_problem_type != NULL)
00352     dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
00353                     "Address of type %s was missing argument %s",
00354                     address_problem_type, address_problem_field);
00355   else
00356     dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
00357                     "Could not parse address: %s",
00358                     address_problem_other);
00359 
00360   return NULL;
00361 }
00362 
00369 DBusTransport *
00370 _dbus_transport_ref (DBusTransport *transport)
00371 {
00372   _dbus_assert (transport->refcount > 0);
00373   
00374   transport->refcount += 1;
00375 
00376   return transport;
00377 }
00378 
00386 void
00387 _dbus_transport_unref (DBusTransport *transport)
00388 {
00389   _dbus_assert (transport != NULL);
00390   _dbus_assert (transport->refcount > 0);
00391   
00392   transport->refcount -= 1;
00393   if (transport->refcount == 0)
00394     {
00395       _dbus_verbose ("%s: finalizing\n", _DBUS_FUNCTION_NAME);
00396       
00397       _dbus_assert (transport->vtable->finalize != NULL);
00398       
00399       (* transport->vtable->finalize) (transport);
00400     }
00401 }
00402 
00411 void
00412 _dbus_transport_disconnect (DBusTransport *transport)
00413 {
00414   _dbus_verbose ("%s start\n", _DBUS_FUNCTION_NAME);
00415   
00416   _dbus_assert (transport->vtable->disconnect != NULL);
00417   
00418   if (transport->disconnected)
00419     return;
00420 
00421   (* transport->vtable->disconnect) (transport);
00422   
00423   transport->disconnected = TRUE;
00424 
00425   _dbus_verbose ("%s end\n", _DBUS_FUNCTION_NAME);
00426 }
00427 
00436 dbus_bool_t
00437 _dbus_transport_get_is_connected (DBusTransport *transport)
00438 {
00439   return !transport->disconnected;
00440 }
00441 
00452 dbus_bool_t
00453 _dbus_transport_get_is_authenticated (DBusTransport *transport)
00454 {  
00455   if (transport->authenticated)
00456     return TRUE;
00457   else
00458     {
00459       dbus_bool_t maybe_authenticated;
00460       
00461       if (transport->disconnected)
00462         return FALSE;
00463 
00464       /* paranoia ref since we call user callbacks sometimes */
00465       _dbus_connection_ref_unlocked (transport->connection);
00466       
00467       maybe_authenticated =
00468         (!(transport->send_credentials_pending ||
00469            transport->receive_credentials_pending));
00470 
00471       if (maybe_authenticated)
00472         {
00473           switch (_dbus_auth_do_work (transport->auth))
00474             {
00475             case DBUS_AUTH_STATE_AUTHENTICATED:
00476               /* leave as maybe_authenticated */
00477               break;
00478             default:
00479               maybe_authenticated = FALSE;
00480             }
00481         }
00482       
00483       /* If we've authenticated as some identity, check that the auth
00484        * identity is the same as our own identity.  In the future, we
00485        * may have API allowing applications to specify how this is
00486        * done, for example they may allow connection as any identity,
00487        * but then impose restrictions on certain identities.
00488        * Or they may give certain identities extra privileges.
00489        */
00490       
00491       if (maybe_authenticated && transport->is_server)
00492         {
00493           DBusCredentials auth_identity;
00494 
00495           _dbus_auth_get_identity (transport->auth, &auth_identity);
00496 
00497           if (transport->unix_user_function != NULL)
00498             {
00499               dbus_bool_t allow;
00500               DBusConnection *connection;
00501               DBusAllowUnixUserFunction unix_user_function;
00502               void *unix_user_data;
00503               
00504               /* Dropping the lock here probably isn't that safe. */
00505 
00506               connection = transport->connection;
00507               unix_user_function = transport->unix_user_function;
00508               unix_user_data = transport->unix_user_data;
00509 
00510               _dbus_verbose ("unlock %s\n", _DBUS_FUNCTION_NAME);
00511               _dbus_connection_unlock (connection);
00512               
00513               allow = (* unix_user_function) (connection,
00514                                               auth_identity.uid,
00515                                               unix_user_data);
00516 
00517               _dbus_verbose ("lock %s post unix user function\n", _DBUS_FUNCTION_NAME);
00518               _dbus_connection_lock (connection);
00519 
00520               if (allow)
00521                 {
00522                   _dbus_verbose ("Client UID "DBUS_UID_FORMAT" authorized\n", auth_identity.uid);
00523                 }
00524               else
00525                 {
00526                   _dbus_verbose ("Client UID "DBUS_UID_FORMAT
00527                                  " was rejected, disconnecting\n",
00528                                  auth_identity.uid);
00529                   _dbus_transport_disconnect (transport);
00530                   _dbus_connection_unref_unlocked (connection);
00531                   return FALSE;
00532                 }
00533             }
00534           else
00535             {
00536               DBusCredentials our_identity;
00537               
00538               _dbus_credentials_from_current_process (&our_identity);
00539               
00540               if (!_dbus_credentials_match (&our_identity,
00541                                             &auth_identity))
00542                 {
00543                   _dbus_verbose ("Client authorized as UID "DBUS_UID_FORMAT
00544                                  " but our UID is "DBUS_UID_FORMAT", disconnecting\n",
00545                                  auth_identity.uid, our_identity.uid);
00546                   _dbus_transport_disconnect (transport);
00547                   _dbus_connection_unref_unlocked (transport->connection);
00548                   return FALSE;
00549                 }
00550               else
00551                 {
00552                   _dbus_verbose ("Client authorized as UID "DBUS_UID_FORMAT
00553                                  " matching our UID "DBUS_UID_FORMAT"\n",
00554                                  auth_identity.uid, our_identity.uid);
00555                 }
00556             }
00557         }
00558 
00559       transport->authenticated = maybe_authenticated;
00560 
00561       _dbus_connection_unref_unlocked (transport->connection);
00562       return maybe_authenticated;
00563     }
00564 }
00565 
00573 const char*
00574 _dbus_transport_get_address (DBusTransport *transport)
00575 {
00576   return transport->address;
00577 }
00578 
00588 dbus_bool_t
00589 _dbus_transport_handle_watch (DBusTransport           *transport,
00590                               DBusWatch               *watch,
00591                               unsigned int             condition)
00592 {
00593   dbus_bool_t retval;
00594   
00595   _dbus_assert (transport->vtable->handle_watch != NULL);
00596 
00597   if (transport->disconnected)
00598     return TRUE;
00599 
00600   if (dbus_watch_get_fd (watch) < 0)
00601     {
00602       _dbus_warn ("Tried to handle an invalidated watch; this watch should have been removed\n");
00603       return TRUE;
00604     }
00605   
00606   _dbus_watch_sanitize_condition (watch, &condition);
00607 
00608   _dbus_transport_ref (transport);
00609   _dbus_watch_ref (watch);
00610   retval = (* transport->vtable->handle_watch) (transport, watch, condition);
00611   _dbus_watch_unref (watch);
00612   _dbus_transport_unref (transport);
00613 
00614   return retval;
00615 }
00616 
00626 dbus_bool_t
00627 _dbus_transport_set_connection (DBusTransport  *transport,
00628                                 DBusConnection *connection)
00629 {
00630   _dbus_assert (transport->vtable->connection_set != NULL);
00631   _dbus_assert (transport->connection == NULL);
00632   
00633   transport->connection = connection;
00634 
00635   _dbus_transport_ref (transport);
00636   if (!(* transport->vtable->connection_set) (transport))
00637     transport->connection = NULL;
00638   _dbus_transport_unref (transport);
00639 
00640   return transport->connection != NULL;
00641 }
00642 
00650 dbus_bool_t
00651 _dbus_transport_get_unix_fd (DBusTransport *transport,
00652                              int           *fd_p)
00653 {
00654   dbus_bool_t retval;
00655   
00656   if (transport->vtable->get_unix_fd == NULL)
00657     return FALSE;
00658 
00659   if (transport->disconnected)
00660     return FALSE;
00661 
00662   _dbus_transport_ref (transport);
00663 
00664   retval = (* transport->vtable->get_unix_fd) (transport,
00665                                                fd_p);
00666   
00667   _dbus_transport_unref (transport);
00668 
00669   return retval;
00670 }
00671 
00683 void
00684 _dbus_transport_do_iteration (DBusTransport  *transport,
00685                               unsigned int    flags,
00686                               int             timeout_milliseconds)
00687 {
00688   _dbus_assert (transport->vtable->do_iteration != NULL);
00689 
00690   _dbus_verbose ("Transport iteration flags 0x%x timeout %d connected = %d\n",
00691                  flags, timeout_milliseconds, !transport->disconnected);
00692   
00693   if ((flags & (DBUS_ITERATION_DO_WRITING |
00694                 DBUS_ITERATION_DO_READING)) == 0)
00695     return; /* Nothing to do */
00696 
00697   if (transport->disconnected)
00698     return;
00699 
00700   _dbus_transport_ref (transport);
00701   (* transport->vtable->do_iteration) (transport, flags,
00702                                        timeout_milliseconds);
00703   _dbus_transport_unref (transport);
00704 
00705   _dbus_verbose ("%s end\n", _DBUS_FUNCTION_NAME);
00706 }
00707 
00708 static dbus_bool_t
00709 recover_unused_bytes (DBusTransport *transport)
00710 {
00711   if (_dbus_auth_needs_decoding (transport->auth))
00712     {
00713       DBusString plaintext;
00714       const DBusString *encoded;
00715       DBusString *buffer;
00716       int orig_len;
00717       
00718       if (!_dbus_string_init (&plaintext))
00719         goto nomem;
00720       
00721       _dbus_auth_get_unused_bytes (transport->auth,
00722                                    &encoded);
00723 
00724       if (!_dbus_auth_decode_data (transport->auth,
00725                                    encoded, &plaintext))
00726         {
00727           _dbus_string_free (&plaintext);
00728           goto nomem;
00729         }
00730       
00731       _dbus_message_loader_get_buffer (transport->loader,
00732                                        &buffer);
00733       
00734       orig_len = _dbus_string_get_length (buffer);
00735       
00736       if (!_dbus_string_move (&plaintext, 0, buffer,
00737                               orig_len))
00738         {
00739           _dbus_string_free (&plaintext);
00740           goto nomem;
00741         }
00742       
00743       _dbus_verbose (" %d unused bytes sent to message loader\n", 
00744                      _dbus_string_get_length (buffer) -
00745                      orig_len);
00746       
00747       _dbus_message_loader_return_buffer (transport->loader,
00748                                           buffer,
00749                                           _dbus_string_get_length (buffer) -
00750                                           orig_len);
00751 
00752       _dbus_auth_delete_unused_bytes (transport->auth);
00753       
00754       _dbus_string_free (&plaintext);
00755     }
00756   else
00757     {
00758       const DBusString *bytes;
00759       DBusString *buffer;
00760       int orig_len;
00761       dbus_bool_t succeeded;
00762 
00763       _dbus_message_loader_get_buffer (transport->loader,
00764                                        &buffer);
00765                 
00766       orig_len = _dbus_string_get_length (buffer);
00767                 
00768       _dbus_auth_get_unused_bytes (transport->auth,
00769                                    &bytes);
00770 
00771       succeeded = TRUE;
00772       if (!_dbus_string_copy (bytes, 0, buffer, _dbus_string_get_length (buffer)))
00773         succeeded = FALSE;
00774       
00775       _dbus_verbose (" %d unused bytes sent to message loader\n", 
00776                      _dbus_string_get_length (buffer) -
00777                      orig_len);
00778       
00779       _dbus_message_loader_return_buffer (transport->loader,
00780                                           buffer,
00781                                           _dbus_string_get_length (buffer) -
00782                                           orig_len);
00783 
00784       if (succeeded)
00785         _dbus_auth_delete_unused_bytes (transport->auth);
00786       else
00787         goto nomem;
00788     }
00789 
00790   return TRUE;
00791 
00792  nomem:
00793   _dbus_verbose ("Not enough memory to transfer unused bytes from auth conversation\n");
00794   return FALSE;
00795 }
00796 
00804 DBusDispatchStatus
00805 _dbus_transport_get_dispatch_status (DBusTransport *transport)
00806 {
00807   if (_dbus_counter_get_value (transport->live_messages_size) >= transport->max_live_messages_size)
00808     return DBUS_DISPATCH_COMPLETE; /* complete for now */
00809 
00810   if (!_dbus_transport_get_is_authenticated (transport))
00811     {
00812       if (_dbus_auth_do_work (transport->auth) ==
00813           DBUS_AUTH_STATE_WAITING_FOR_MEMORY)
00814         return DBUS_DISPATCH_NEED_MEMORY;
00815       else if (!_dbus_transport_get_is_authenticated (transport))
00816         return DBUS_DISPATCH_COMPLETE;
00817     }
00818 
00819   if (!transport->unused_bytes_recovered &&
00820       !recover_unused_bytes (transport))
00821     return DBUS_DISPATCH_NEED_MEMORY;
00822 
00823   transport->unused_bytes_recovered = TRUE;
00824   
00825   if (!_dbus_message_loader_queue_messages (transport->loader))
00826     return DBUS_DISPATCH_NEED_MEMORY;
00827 
00828   if (_dbus_message_loader_peek_message (transport->loader) != NULL)
00829     return DBUS_DISPATCH_DATA_REMAINS;
00830   else
00831     return DBUS_DISPATCH_COMPLETE;
00832 }
00833 
00842 dbus_bool_t
00843 _dbus_transport_queue_messages (DBusTransport *transport)
00844 {
00845   DBusDispatchStatus status;
00846 
00847 #if 0
00848   _dbus_verbose ("_dbus_transport_queue_messages()\n");
00849 #endif
00850   
00851   /* Queue any messages */
00852   while ((status = _dbus_transport_get_dispatch_status (transport)) == DBUS_DISPATCH_DATA_REMAINS)
00853     {
00854       DBusMessage *message;
00855       DBusList *link;
00856 
00857       link = _dbus_message_loader_pop_message_link (transport->loader);
00858       _dbus_assert (link != NULL);
00859       
00860       message = link->data;
00861       
00862       _dbus_verbose ("queueing received message %p\n", message);
00863 
00864       if (!_dbus_message_add_size_counter (message, transport->live_messages_size))
00865         {
00866           _dbus_message_loader_putback_message_link (transport->loader,
00867                                                      link);
00868           status = DBUS_DISPATCH_NEED_MEMORY;
00869           break;
00870         }
00871       else
00872         {
00873           /* pass ownership of link and message ref to connection */
00874           _dbus_connection_queue_received_message_link (transport->connection,
00875                                                         link);
00876         }
00877     }
00878 
00879   if (_dbus_message_loader_get_is_corrupted (transport->loader))
00880     {
00881       _dbus_verbose ("Corrupted message stream, disconnecting\n");
00882       _dbus_transport_disconnect (transport);
00883     }
00884 
00885   return status != DBUS_DISPATCH_NEED_MEMORY;
00886 }
00887 
00894 void
00895 _dbus_transport_set_max_message_size (DBusTransport  *transport,
00896                                       long            size)
00897 {
00898   _dbus_message_loader_set_max_message_size (transport->loader, size);
00899 }
00900 
00907 long
00908 _dbus_transport_get_max_message_size (DBusTransport  *transport)
00909 {
00910   return _dbus_message_loader_get_max_message_size (transport->loader);
00911 }
00912 
00919 void
00920 _dbus_transport_set_max_received_size (DBusTransport  *transport,
00921                                        long            size)
00922 {
00923   transport->max_live_messages_size = size;
00924   _dbus_counter_set_notify (transport->live_messages_size,
00925                             transport->max_live_messages_size,
00926                             live_messages_size_notify,
00927                             transport);
00928 }
00929 
00930 
00937 long
00938 _dbus_transport_get_max_received_size (DBusTransport  *transport)
00939 {
00940   return transport->max_live_messages_size;
00941 }
00942 
00950 dbus_bool_t
00951 _dbus_transport_get_unix_user (DBusTransport *transport,
00952                                unsigned long *uid)
00953 {
00954   DBusCredentials auth_identity;
00955 
00956   *uid = _DBUS_INT_MAX; /* better than some root or system user in
00957                          * case of bugs in the caller. Caller should
00958                          * never use this value on purpose, however.
00959                          */
00960   
00961   if (!transport->authenticated)
00962     return FALSE;
00963   
00964   _dbus_auth_get_identity (transport->auth, &auth_identity);
00965 
00966   if (auth_identity.uid != DBUS_UID_UNSET)
00967     {
00968       *uid = auth_identity.uid;
00969       return TRUE;
00970     }
00971   else
00972     return FALSE;
00973 }
00974 
00982 dbus_bool_t
00983 _dbus_transport_get_unix_process_id (DBusTransport *transport,
00984                                      unsigned long *pid)
00985 {
00986   DBusCredentials auth_identity;
00987 
00988   *pid = DBUS_PID_UNSET; /* Caller should never use this value on purpose,
00989                           * but we set it to a safe number, INT_MAX,
00990                           * just to root out possible bugs in bad callers.
00991                           */
00992   
00993   if (!transport->authenticated)
00994     return FALSE;
00995   
00996   _dbus_auth_get_identity (transport->auth, &auth_identity);
00997 
00998   if (auth_identity.pid != DBUS_PID_UNSET)
00999     {
01000       *pid = auth_identity.pid;
01001       return TRUE;
01002     }
01003   else
01004     return FALSE;
01005 }
01006 
01017 void
01018 _dbus_transport_set_unix_user_function (DBusTransport             *transport,
01019                                         DBusAllowUnixUserFunction  function,
01020                                         void                      *data,
01021                                         DBusFreeFunction           free_data_function,
01022                                         void                     **old_data,
01023                                         DBusFreeFunction          *old_free_data_function)
01024 {  
01025   *old_data = transport->unix_user_data;
01026   *old_free_data_function = transport->free_unix_user_data;
01027 
01028   transport->unix_user_function = function;
01029   transport->unix_user_data = data;
01030   transport->free_unix_user_data = free_data_function;
01031 }
01032 
01041 dbus_bool_t
01042 _dbus_transport_set_auth_mechanisms (DBusTransport  *transport,
01043                                      const char    **mechanisms)
01044 {
01045   return _dbus_auth_set_mechanisms (transport->auth, mechanisms);
01046 }
01047 
01048 

Generated on Thu Aug 11 21:11:14 2005 for D-BUS by  doxygen 1.4.0