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3160bcad6a
This allows the caller to specify the reply type that they are expecting
for this call. If the reply comes back with the wrong type, GDBus will
generate an appropriate error internally.
- add a GVariantType * argument to g_dbus_connection_call() and
_call_sync().
- move the internal API for computing message types from introspection
data to be based on GVariantType instead of strings. Update users
of this code.
- have GDBusProxy pass this calculated GVariantType into
g_dbus_connection_call(). Remove the checks done in GDBusProxy.
- Update other users of the code (test cases, gdbus-tool, GSettings
tool, etc). In some cases, remove redundant checks; in some other
cases, we are fixing bugs because no checking was done where it
should have been.
Closes bug #619391.
307 lines
10 KiB
C
307 lines
10 KiB
C
/*
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Usage examples (modulo addresses / credentials).
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UNIX domain socket transport:
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Server:
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$ ./gdbus-example-peer --server --address unix:abstract=myaddr
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Server is listening at: unix:abstract=myaddr
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Client connected.
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Peer credentials: GCredentials:unix-user=500,unix-group=500,unix-process=13378
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Negotiated capabilities: unix-fd-passing=1
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Client said: Hey, it's 1273093080 already!
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Client:
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$ ./gdbus-example-peer --address unix:abstract=myaddr
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Connected.
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Negotiated capabilities: unix-fd-passing=1
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Server said: You said 'Hey, it's 1273093080 already!'. KTHXBYE!
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Nonce-secured TCP transport on the same host:
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Server:
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$ ./gdbus-example-peer --server --address nonce-tcp:
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Server is listening at: nonce-tcp:host=localhost,port=43077,noncefile=/tmp/gdbus-nonce-file-X1ZNCV
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Client connected.
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Peer credentials: (no credentials received)
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Negotiated capabilities: unix-fd-passing=0
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Client said: Hey, it's 1273093206 already!
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Client:
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$ ./gdbus-example-peer -address nonce-tcp:host=localhost,port=43077,noncefile=/tmp/gdbus-nonce-file-X1ZNCV
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Connected.
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Negotiated capabilities: unix-fd-passing=0
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Server said: You said 'Hey, it's 1273093206 already!'. KTHXBYE!
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TCP transport on two different hosts with a shared home directory:
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Server:
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host1 $ ./gdbus-example-peer --server --address tcp:host=0.0.0.0
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Server is listening at: tcp:host=0.0.0.0,port=46314
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Client connected.
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Peer credentials: (no credentials received)
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Negotiated capabilities: unix-fd-passing=0
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Client said: Hey, it's 1273093337 already!
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Client:
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host2 $ ./gdbus-example-peer -a tcp:host=host1,port=46314
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Connected.
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Negotiated capabilities: unix-fd-passing=0
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Server said: You said 'Hey, it's 1273093337 already!'. KTHXBYE!
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TCP transport on two different hosts without authentication:
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Server:
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host1 $ ./gdbus-example-peer --server --address tcp:host=0.0.0.0 --allow-anonymous
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Server is listening at: tcp:host=0.0.0.0,port=59556
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Client connected.
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Peer credentials: (no credentials received)
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Negotiated capabilities: unix-fd-passing=0
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Client said: Hey, it's 1273093652 already!
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Client:
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host2 $ ./gdbus-example-peer -a tcp:host=host1,port=59556
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Connected.
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Negotiated capabilities: unix-fd-passing=0
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Server said: You said 'Hey, it's 1273093652 already!'. KTHXBYE!
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*/
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#include <gio/gio.h>
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#include <stdlib.h>
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/* ---------------------------------------------------------------------------------------------------- */
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static GDBusNodeInfo *introspection_data = NULL;
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/* Introspection data for the service we are exporting */
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static const gchar introspection_xml[] =
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"<node>"
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" <interface name='org.gtk.GDBus.TestPeerInterface'>"
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" <method name='HelloWorld'>"
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" <arg type='s' name='greeting' direction='in'/>"
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" <arg type='s' name='response' direction='out'/>"
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" </method>"
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" </interface>"
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"</node>";
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/* ---------------------------------------------------------------------------------------------------- */
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static void
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handle_method_call (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *method_name,
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GVariant *parameters,
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GDBusMethodInvocation *invocation,
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gpointer user_data)
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{
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if (g_strcmp0 (method_name, "HelloWorld") == 0)
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{
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const gchar *greeting;
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gchar *response;
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g_variant_get (parameters, "(&s)", &greeting);
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response = g_strdup_printf ("You said '%s'. KTHXBYE!", greeting);
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g_dbus_method_invocation_return_value (invocation,
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g_variant_new ("(s)", response));
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g_free (response);
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g_print ("Client said: %s\n", greeting);
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}
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}
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static const GDBusInterfaceVTable interface_vtable =
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{
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handle_method_call,
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NULL,
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NULL,
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};
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/* ---------------------------------------------------------------------------------------------------- */
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static void
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on_new_connection (GDBusServer *server,
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GDBusConnection *connection,
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gpointer user_data)
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{
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guint registration_id;
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GCredentials *credentials;
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gchar *s;
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credentials = g_dbus_connection_get_peer_credentials (connection);
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if (credentials == NULL)
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s = g_strdup ("(no credentials received)");
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else
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s = g_credentials_to_string (credentials);
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g_print ("Client connected.\n"
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"Peer credentials: %s\n"
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"Negotiated capabilities: unix-fd-passing=%d\n",
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s,
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g_dbus_connection_get_capabilities (connection) & G_DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING);
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g_object_ref (connection);
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registration_id = g_dbus_connection_register_object (connection,
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"/org/gtk/GDBus/TestObject",
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introspection_data->interfaces[0],
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&interface_vtable,
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NULL, /* user_data */
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NULL, /* user_data_free_func */
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NULL); /* GError** */
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g_assert (registration_id > 0);
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}
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/* ---------------------------------------------------------------------------------------------------- */
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int
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main (int argc, char *argv[])
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{
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gint ret;
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gboolean opt_server;
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gchar *opt_address;
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GOptionContext *opt_context;
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gboolean opt_allow_anonymous;
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GError *error;
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GOptionEntry opt_entries[] =
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{
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{ "server", 's', 0, G_OPTION_ARG_NONE, &opt_server, "Start a server instead of a client", NULL },
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{ "address", 'a', 0, G_OPTION_ARG_STRING, &opt_address, "D-Bus address to use", NULL },
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{ "allow-anonymous", 'n', 0, G_OPTION_ARG_NONE, &opt_allow_anonymous, "Allow anonymous authentication", NULL },
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{ NULL}
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};
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ret = 1;
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g_type_init ();
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opt_address = NULL;
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opt_server = FALSE;
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opt_allow_anonymous = FALSE;
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opt_context = g_option_context_new ("peer-to-peer example");
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error = NULL;
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g_option_context_add_main_entries (opt_context, opt_entries, NULL);
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if (!g_option_context_parse (opt_context, &argc, &argv, &error))
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{
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g_printerr ("Error parsing options: %s\n", error->message);
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g_error_free (error);
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goto out;
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}
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if (opt_address == NULL)
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{
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g_printerr ("Incorrect usage, try --help.\n");
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goto out;
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}
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if (!opt_server && opt_allow_anonymous)
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{
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g_printerr ("The --allow-anonymous option only makes sense when used with --server.\n");
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goto out;
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}
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/* We are lazy here - we don't want to manually provide
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* the introspection data structures - so we just build
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* them from XML.
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*/
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introspection_data = g_dbus_node_info_new_for_xml (introspection_xml, NULL);
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g_assert (introspection_data != NULL);
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if (opt_server)
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{
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GDBusServer *server;
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gchar *guid;
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GMainLoop *loop;
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GDBusServerFlags server_flags;
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guid = g_dbus_generate_guid ();
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server_flags = G_DBUS_SERVER_FLAGS_NONE;
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if (opt_allow_anonymous)
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server_flags |= G_DBUS_SERVER_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS;
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error = NULL;
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server = g_dbus_server_new_sync (opt_address,
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server_flags,
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guid,
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NULL, /* GDBusAuthObserver */
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NULL, /* GCancellable */
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&error);
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g_dbus_server_start (server);
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g_free (guid);
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if (server == NULL)
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{
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g_printerr ("Error creating server at address %s: %s\n", opt_address, error->message);
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g_error_free (error);
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goto out;
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}
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g_print ("Server is listening at: %s\n", g_dbus_server_get_client_address (server));
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g_signal_connect (server,
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"new-connection",
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G_CALLBACK (on_new_connection),
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NULL);
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loop = g_main_loop_new (NULL, FALSE);
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g_main_loop_run (loop);
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g_object_unref (server);
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g_main_loop_unref (loop);
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}
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else
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{
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GDBusConnection *connection;
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const gchar *greeting_response;
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GVariant *value;
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gchar *greeting;
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error = NULL;
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connection = g_dbus_connection_new_for_address_sync (opt_address,
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G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT,
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NULL, /* GDBusAuthObserver */
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NULL, /* GCancellable */
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&error);
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if (connection == NULL)
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{
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g_printerr ("Error connecting to D-Bus address %s: %s\n", opt_address, error->message);
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g_error_free (error);
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goto out;
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}
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g_print ("Connected.\n"
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"Negotiated capabilities: unix-fd-passing=%d\n",
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g_dbus_connection_get_capabilities (connection) & G_DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING);
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greeting = g_strdup_printf ("Hey, it's %" G_GUINT64_FORMAT " already!", (guint64) time (NULL));
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value = g_dbus_connection_call_sync (connection,
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NULL, /* bus_name */
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"/org/gtk/GDBus/TestObject",
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"org.gtk.GDBus.TestPeerInterface",
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"HelloWorld",
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g_variant_new ("(s)", greeting),
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G_VARIANT_TYPE ("(s)"),
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G_DBUS_CALL_FLAGS_NONE,
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-1,
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NULL,
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&error);
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if (value == NULL)
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{
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g_printerr ("Error invoking HelloWorld(): %s\n", error->message);
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g_error_free (error);
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goto out;
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}
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g_variant_get (value, "(&s)", &greeting_response);
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g_print ("Server said: %s\n", greeting_response);
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g_variant_unref (value);
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g_object_unref (connection);
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}
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g_dbus_node_info_unref (introspection_data);
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ret = 0;
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out:
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return ret;
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}
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