gio/tests/gdbus-example-peer.c

   1 /*
   2
   3 Usage examples (modulo addresses / credentials).
   4
   5 UNIX domain socket transport:
   6
   7  Server:
   8    $ ./gdbus-example-peer --server --address unix:abstract=myaddr
   9    Server is listening at: unix:abstract=myaddr
  10    Client connected.
  11    Peer credentials: GCredentials:unix-user=500,unix-group=500,unix-process=13378
  12    Negotiated capabilities: unix-fd-passing=1
  13    Client said: Hey, it's 1273093080 already!
  14
  15  Client:
  16    $ ./gdbus-example-peer --address unix:abstract=myaddr
  17    Connected.
  18    Negotiated capabilities: unix-fd-passing=1
  19    Server said: You said 'Hey, it's 1273093080 already!'. KTHXBYE!
  20
  21 Nonce-secured TCP transport on the same host:
  22
  23  Server:
  24    $ ./gdbus-example-peer --server --address nonce-tcp:
  25    Server is listening at: nonce-tcp:host=localhost,port=43077,noncefile=/tmp/gdbus-nonce-file-X1ZNCV
  26    Client connected.
  27    Peer credentials: (no credentials received)
  28    Negotiated capabilities: unix-fd-passing=0
  29    Client said: Hey, it's 1273093206 already!
  30
  31  Client:
  32    $ ./gdbus-example-peer -address nonce-tcp:host=localhost,port=43077,noncefile=/tmp/gdbus-nonce-file-X1ZNCV
  33    Connected.
  34    Negotiated capabilities: unix-fd-passing=0
  35    Server said: You said 'Hey, it's 1273093206 already!'. KTHXBYE!
  36
  37 TCP transport on two different hosts with a shared home directory:
  38
  39  Server:
  40    host1 $ ./gdbus-example-peer --server --address tcp:host=0.0.0.0
  41    Server is listening at: tcp:host=0.0.0.0,port=46314
  42    Client connected.
  43    Peer credentials: (no credentials received)
  44    Negotiated capabilities: unix-fd-passing=0
  45    Client said: Hey, it's 1273093337 already!
  46
  47  Client:
  48    host2 $ ./gdbus-example-peer -a tcp:host=host1,port=46314
  49    Connected.
  50    Negotiated capabilities: unix-fd-passing=0
  51    Server said: You said 'Hey, it's 1273093337 already!'. KTHXBYE!
  52
  53 TCP transport on two different hosts without authentication:
  54
  55  Server:
  56    host1 $ ./gdbus-example-peer --server --address tcp:host=0.0.0.0 --allow-anonymous
  57    Server is listening at: tcp:host=0.0.0.0,port=59556
  58    Client connected.
  59    Peer credentials: (no credentials received)
  60    Negotiated capabilities: unix-fd-passing=0
  61    Client said: Hey, it's 1273093652 already!
  62
  63  Client:
  64    host2 $ ./gdbus-example-peer -a tcp:host=host1,port=59556
  65    Connected.
  66    Negotiated capabilities: unix-fd-passing=0
  67    Server said: You said 'Hey, it's 1273093652 already!'. KTHXBYE!
  68
  69  */
  70
  71 #include <gio/gio.h>
  72 #include <stdlib.h>
  73
  74 /* ---------------------------------------------------------------------------------------------------- */
  75
  76 static GDBusNodeInfo *introspection_data = NULL;
  77
  78 /* Introspection data for the service we are exporting */
  79 static const gchar introspection_xml[] =
  80   "<node>"
  81   "  <interface name='org.gtk.GDBus.TestPeerInterface'>"
  82   "    <method name='HelloWorld'>"
  83   "      <arg type='s' name='greeting' direction='in'/>"
  84   "      <arg type='s' name='response' direction='out'/>"
  85   "    </method>"
  86   "  </interface>"
  87   "</node>";
  88
  89 /* ---------------------------------------------------------------------------------------------------- */
  90
  91 static void
  92 handle_method_call (GDBusConnection       *connection,
  93                     const gchar           *sender,
  94                     const gchar           *object_path,
  95                     const gchar           *interface_name,
  96                     const gchar           *method_name,
  97                     GVariant              *parameters,
  98                     GDBusMethodInvocation *invocation,
  99                     gpointer               user_data)
 100 {
 101   if (g_strcmp0 (method_name, "HelloWorld") == 0)
 102     {
 103       const gchar *greeting;
 104       gchar *response;
 105
 106       g_variant_get (parameters, "(&s)", &greeting);
 107       response = g_strdup_printf ("You said '%s'. KTHXBYE!", greeting);
 108       g_dbus_method_invocation_return_value (invocation,
 109                                              g_variant_new ("(s)", response));
 110       g_free (response);
 111       g_print ("Client said: %s\n", greeting);
 112     }
 113 }
 114
 115 static const GDBusInterfaceVTable interface_vtable =
 116 {
 117   handle_method_call,
 118   NULL,
 119   NULL,
 120 };
 121
 122 /* ---------------------------------------------------------------------------------------------------- */
 123
 124 static gboolean
 125 on_new_connection (GDBusServer *server,
 126                    GDBusConnection *connection,
 127                    gpointer user_data)
 128 {
 129   guint registration_id;
 130   GCredentials *credentials;
 131   gchar *s;
 132
 133   credentials = g_dbus_connection_get_peer_credentials (connection);
 134   if (credentials == NULL)
 135     s = g_strdup ("(no credentials received)");
 136   else
 137     s = g_credentials_to_string (credentials);
 138
 139
 140   g_print ("Client connected.\n"
 141            "Peer credentials: %s\n"
 142            "Negotiated capabilities: unix-fd-passing=%d\n",
 143            s,
 144            g_dbus_connection_get_capabilities (connection) & G_DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING);
 145
 146   g_object_ref (connection);
 147   registration_id = g_dbus_connection_register_object (connection,
 148                                                        "/org/gtk/GDBus/TestObject",
 149                                                        introspection_data->interfaces[0],
 150                                                        &interface_vtable,
 151                                                        NULL,  /* user_data */
 152                                                        NULL,  /* user_data_free_func */
 153                                                        NULL); /* GError** */
 154   g_assert (registration_id > 0);
 155
 156   return TRUE;
 157 }
 158
 159 /* ---------------------------------------------------------------------------------------------------- */
 160
 161 int
 162 main (int argc, char *argv[])
 163 {
 164   gint ret;
 165   gboolean opt_server;
 166   gchar *opt_address;
 167   GOptionContext *opt_context;
 168   gboolean opt_allow_anonymous;
 169   GError *error;
 170   GOptionEntry opt_entries[] =
 171     {
 172       { "server", 's', 0, G_OPTION_ARG_NONE, &opt_server, "Start a server instead of a client", NULL },
 173       { "address", 'a', 0, G_OPTION_ARG_STRING, &opt_address, "D-Bus address to use", NULL },
 174       { "allow-anonymous", 'n', 0, G_OPTION_ARG_NONE, &opt_allow_anonymous, "Allow anonymous authentication", NULL },
 175       { NULL}
 176     };
 177
 178   ret = 1;
 179
 180   opt_address = NULL;
 181   opt_server = FALSE;
 182   opt_allow_anonymous = FALSE;
 183
 184   opt_context = g_option_context_new ("peer-to-peer example");
 185   error = NULL;
 186   g_option_context_add_main_entries (opt_context, opt_entries, NULL);
 187   if (!g_option_context_parse (opt_context, &argc, &argv, &error))
 188     {
 189       g_printerr ("Error parsing options: %s\n", error->message);
 190       g_error_free (error);
 191       goto out;
 192     }
 193   if (opt_address == NULL)
 194     {
 195       g_printerr ("Incorrect usage, try --help.\n");
 196       goto out;
 197     }
 198   if (!opt_server && opt_allow_anonymous)
 199     {
 200       g_printerr ("The --allow-anonymous option only makes sense when used with --server.\n");
 201       goto out;
 202     }
 203
 204   /* We are lazy here - we don't want to manually provide
 205    * the introspection data structures - so we just build
 206    * them from XML.
 207    */
 208   introspection_data = g_dbus_node_info_new_for_xml (introspection_xml, NULL);
 209   g_assert (introspection_data != NULL);
 210
 211   if (opt_server)
 212     {
 213       GDBusServer *server;
 214       gchar *guid;
 215       GMainLoop *loop;
 216       GDBusServerFlags server_flags;
 217
 218       guid = g_dbus_generate_guid ();
 219
 220       server_flags = G_DBUS_SERVER_FLAGS_NONE;
 221       if (opt_allow_anonymous)
 222         server_flags |= G_DBUS_SERVER_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS;
 223
 224       error = NULL;
 225       server = g_dbus_server_new_sync (opt_address,
 226                                        server_flags,
 227                                        guid,
 228                                        NULL, /* GDBusAuthObserver */
 229                                        NULL, /* GCancellable */
 230                                        &error);
 231       g_dbus_server_start (server);
 232       g_free (guid);
 233
 234       if (server == NULL)
 235         {
 236           g_printerr ("Error creating server at address %s: %s\n", opt_address, error->message);
 237           g_error_free (error);
 238           goto out;
 239         }
 240       g_print ("Server is listening at: %s\n", g_dbus_server_get_client_address (server));
 241       g_signal_connect (server,
 242                         "new-connection",
 243                         G_CALLBACK (on_new_connection),
 244                         NULL);
 245
 246       loop = g_main_loop_new (NULL, FALSE);
 247       g_main_loop_run (loop);
 248
 249       g_object_unref (server);
 250       g_main_loop_unref (loop);
 251     }
 252   else
 253     {
 254       GDBusConnection *connection;
 255       const gchar *greeting_response;
 256       GVariant *value;
 257       gchar *greeting;
 258
 259       error = NULL;
 260       connection = g_dbus_connection_new_for_address_sync (opt_address,
 261                                                            G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT,
 262                                                            NULL, /* GDBusAuthObserver */
 263                                                            NULL, /* GCancellable */
 264                                                            &error);
 265       if (connection == NULL)
 266         {
 267           g_printerr ("Error connecting to D-Bus address %s: %s\n", opt_address, error->message);
 268           g_error_free (error);
 269           goto out;
 270         }
 271
 272       g_print ("Connected.\n"
 273                "Negotiated capabilities: unix-fd-passing=%d\n",
 274                g_dbus_connection_get_capabilities (connection) & G_DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING);
 275
 276       greeting = g_strdup_printf ("Hey, it's %" G_GUINT64_FORMAT " already!", (guint64) time (NULL));
 277       value = g_dbus_connection_call_sync (connection,
 278                                            NULL, /* bus_name */
 279                                            "/org/gtk/GDBus/TestObject",
 280                                            "org.gtk.GDBus.TestPeerInterface",
 281                                            "HelloWorld",
 282                                            g_variant_new ("(s)", greeting),
 283                                            G_VARIANT_TYPE ("(s)"),
 284                                            G_DBUS_CALL_FLAGS_NONE,
 285                                            -1,
 286                                            NULL,
 287                                            &error);
 288       if (value == NULL)
 289         {
 290           g_printerr ("Error invoking HelloWorld(): %s\n", error->message);
 291           g_error_free (error);
 292           goto out;
 293         }
 294       g_variant_get (value, "(&s)", &greeting_response);
 295       g_print ("Server said: %s\n", greeting_response);
 296       g_variant_unref (value);
 297
 298       g_object_unref (connection);
 299     }
 300   g_dbus_node_info_unref (introspection_data);
 301
 302   ret = 0;
 303
 304  out:
 305   return ret;
 306 }