dbus-server-unix.c

00001 /* -*- mode: C; c-file-style: "gnu" -*- */
00002 /* dbus-server-unix.c Server implementation for Unix network protocols.
00003  *
00004  * Copyright (C) 2002, 2003, 2004  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-internals.h"
00025 #include "dbus-server-unix.h"
00026 #include "dbus-server-socket.h"
00027 #include "dbus-transport-unix.h"
00028 #include "dbus-connection-internal.h"
00029 #include "dbus-sysdeps-unix.h"
00030 #include "dbus-string.h"
00031 
00051 DBusServerListenResult
00052 _dbus_server_listen_platform_specific (DBusAddressEntry *entry,
00053                                        DBusServer      **server_p,
00054                                        DBusError        *error)
00055 {
00056   const char *method;
00057 
00058   *server_p = NULL;
00059   
00060   method = dbus_address_entry_get_method (entry);
00061 
00062   if (strcmp (method, "unix") == 0)
00063     {
00064       const char *path = dbus_address_entry_get_value (entry, "path");
00065       const char *tmpdir = dbus_address_entry_get_value (entry, "tmpdir");
00066       const char *abstract = dbus_address_entry_get_value (entry, "abstract");
00067           
00068       if (path == NULL && tmpdir == NULL && abstract == NULL)
00069         {
00070           _dbus_set_bad_address(error, "unix",
00071                                 "path or tmpdir or abstract",
00072                                 NULL);
00073           return DBUS_SERVER_LISTEN_BAD_ADDRESS;
00074         }
00075 
00076       if ((path && tmpdir) ||
00077           (path && abstract) ||
00078           (tmpdir && abstract))
00079         {
00080           _dbus_set_bad_address(error, NULL, NULL,
00081                                 "cannot specify two of \"path\" and \"tmpdir\" and \"abstract\" at the same time");
00082           return DBUS_SERVER_LISTEN_BAD_ADDRESS;
00083         }
00084 
00085       if (tmpdir != NULL)
00086         {
00087           DBusString full_path;
00088           DBusString filename;
00089               
00090           if (!_dbus_string_init (&full_path))
00091             {
00092               dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
00093               return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
00094             }
00095                   
00096           if (!_dbus_string_init (&filename))
00097             {
00098               _dbus_string_free (&full_path);
00099               dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
00100               return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
00101             }
00102               
00103           if (!_dbus_string_append (&filename,
00104                                     "dbus-") ||
00105               !_dbus_generate_random_ascii (&filename, 10) ||
00106               !_dbus_string_append (&full_path, tmpdir) ||
00107               !_dbus_concat_dir_and_file (&full_path, &filename))
00108             {
00109               _dbus_string_free (&full_path);
00110               _dbus_string_free (&filename);
00111               dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
00112               return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
00113             }
00114               
00115           /* Always use abstract namespace if possible with tmpdir */
00116               
00117           *server_p =
00118             _dbus_server_new_for_domain_socket (_dbus_string_get_const_data (&full_path),
00119 #ifdef HAVE_ABSTRACT_SOCKETS
00120                                                 TRUE,
00121 #else
00122                                                 FALSE,
00123 #endif
00124                                                 error);
00125 
00126           _dbus_string_free (&full_path);
00127           _dbus_string_free (&filename);
00128         }
00129       else
00130         {
00131           if (path)
00132             *server_p = _dbus_server_new_for_domain_socket (path, FALSE, error);
00133           else
00134             *server_p = _dbus_server_new_for_domain_socket (abstract, TRUE, error);
00135         }
00136 
00137       if (*server_p != NULL)
00138         {
00139           _DBUS_ASSERT_ERROR_IS_CLEAR(error);
00140           return DBUS_SERVER_LISTEN_OK;
00141         }
00142       else
00143         {
00144           _DBUS_ASSERT_ERROR_IS_SET(error);
00145           return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
00146         }
00147     }
00148   else
00149     {
00150       /* If we don't handle the method, we return NULL with the
00151        * error unset
00152        */
00153       _DBUS_ASSERT_ERROR_IS_CLEAR(error);
00154       return DBUS_SERVER_LISTEN_NOT_HANDLED;
00155     }
00156 }
00157 
00166 DBusServer*
00167 _dbus_server_new_for_domain_socket (const char     *path,
00168                                     dbus_bool_t     abstract,
00169                                     DBusError      *error)
00170 {
00171   DBusServer *server;
00172   int listen_fd;
00173   DBusString address;
00174   char *path_copy;
00175   DBusString path_str;
00176   
00177   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
00178 
00179   if (!_dbus_string_init (&address))
00180     {
00181       dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
00182       return NULL;
00183     }
00184 
00185   _dbus_string_init_const (&path_str, path);
00186   if ((abstract &&
00187        !_dbus_string_append (&address, "unix:abstract=")) ||
00188       (!abstract &&
00189        !_dbus_string_append (&address, "unix:path=")) ||
00190       !_dbus_address_append_escaped (&address, &path_str))
00191     {
00192       dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
00193       goto failed_0;
00194     }
00195 
00196   path_copy = _dbus_strdup (path);
00197   if (path_copy == NULL)
00198     {
00199       dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
00200       goto failed_0;
00201     }
00202   
00203   listen_fd = _dbus_listen_unix_socket (path, abstract, error);
00204   _dbus_fd_set_close_on_exec (listen_fd);
00205   
00206   if (listen_fd < 0)
00207     {
00208       _DBUS_ASSERT_ERROR_IS_SET (error);
00209       goto failed_1;
00210     }
00211   
00212   server = _dbus_server_new_for_socket (listen_fd, &address);
00213   if (server == NULL)
00214     {
00215       dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
00216       goto failed_2;
00217     }
00218 
00219   _dbus_server_socket_own_filename(server, path_copy);
00220   
00221   _dbus_string_free (&address);
00222   
00223   return server;
00224 
00225  failed_2:
00226   _dbus_close_socket (listen_fd, NULL);
00227  failed_1:
00228   dbus_free (path_copy);
00229  failed_0:
00230   _dbus_string_free (&address);
00231 
00232   return NULL;
00233 }
00234 

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