luc14n0/glib
1
0
Fork 0
mirror of https://gitlab.gnome.org/GNOME/glib.git synced 2024-11-08 18:36:17 +01:00
Code Issues Packages Projects Releases Wiki Activity
b96499690b
glib/gio/gdbusaddress.c

1589 lines
44 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* GDBus - GLib D-Bus Library
*
* Copyright (C) 2008-2010 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: David Zeuthen <davidz@redhat.com>
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include "gioerror.h"
#include "gdbusutils.h"
#include "gdbusaddress.h"
#include "gdbuserror.h"
#include "gioenumtypes.h"
#include "gnetworkaddress.h"
#include "gsocketclient.h"
#include "giostream.h"
#include "gasyncresult.h"
#include "gsimpleasyncresult.h"
#include "glib-private.h"
#include "gdbusprivate.h"
#include "giomodule-priv.h"
#include "gdbusdaemon.h"
#ifdef G_OS_UNIX
#include <gio/gunixsocketaddress.h>
#endif
#ifdef G_OS_WIN32
#include <windows.h>
#include <io.h>
#include <conio.h>
#endif
#include "glibintl.h"
/**
* SECTION:gdbusaddress
* @title: D-Bus Addresses
* @short_description: D-Bus connection endpoints
* @include: gio/gio.h
*
* Routines for working with D-Bus addresses. A D-Bus address is a string
* like "unix:tmpdir=/tmp/my-app-name". The exact format of addresses
* is explained in detail in the <link linkend="http://dbus.freedesktop.org/doc/dbus-specification.html&num;addresses">D-Bus specification</link>.
*/
static gchar *get_session_address_platform_specific (GError **error);
/* ---------------------------------------------------------------------------------------------------- */
/**
* g_dbus_is_address:
* @string: A string.
*
* Checks if @string is a D-Bus address.
*
* This doesn't check if @string is actually supported by #GDBusServer
* or #GDBusConnection - use g_dbus_is_supported_address() to do more
* checks.
*
* Returns: %TRUE if @string is a valid D-Bus address, %FALSE otherwise.
*
* Since: 2.26
*/
gboolean
g_dbus_is_address (const gchar *string)
{
guint n;
gchar **a;
gboolean ret;
ret = FALSE;
g_return_val_if_fail (string != NULL, FALSE);
a = g_strsplit (string, ";", 0);
if (a[0] == NULL)
goto out;
for (n = 0; a[n] != NULL; n++)
{
if (!_g_dbus_address_parse_entry (a[n],
NULL,
NULL,
NULL))
goto out;
}
ret = TRUE;
out:
g_strfreev (a);
return ret;
}
static gboolean
is_valid_unix (const gchar *address_entry,
GHashTable *key_value_pairs,
GError **error)
{
gboolean ret;
GList *keys;
GList *l;
const gchar *path;
const gchar *tmpdir;
const gchar *abstract;
ret = FALSE;
keys = NULL;
path = NULL;
tmpdir = NULL;
abstract = NULL;
keys = g_hash_table_get_keys (key_value_pairs);
for (l = keys; l != NULL; l = l->next)
{
const gchar *key = l->data;
if (g_strcmp0 (key, "path") == 0)
path = g_hash_table_lookup (key_value_pairs, key);
else if (g_strcmp0 (key, "tmpdir") == 0)
tmpdir = g_hash_table_lookup (key_value_pairs, key);
else if (g_strcmp0 (key, "abstract") == 0)
abstract = g_hash_table_lookup (key_value_pairs, key);
else
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Unsupported key `%s' in address entry `%s'"),
key,
address_entry);
goto out;
}
}
if (path != NULL)
{
if (tmpdir != NULL || abstract != NULL)
goto meaningless;
}
else if (tmpdir != NULL)
{
if (path != NULL || abstract != NULL)
goto meaningless;
}
else if (abstract != NULL)
{
if (path != NULL || tmpdir != NULL)
goto meaningless;
}
else
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Address `%s' is invalid (need exactly one of path, tmpdir or abstract keys)"),
address_entry);
goto out;
}
ret= TRUE;
goto out;
meaningless:
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Meaningless key/value pair combination in address entry `%s'"),
address_entry);
out:
g_list_free (keys);
return ret;
}
static gboolean
is_valid_nonce_tcp (const gchar *address_entry,
GHashTable *key_value_pairs,
GError **error)
{
gboolean ret;
GList *keys;
GList *l;
const gchar *host;
const gchar *port;
const gchar *family;
const gchar *nonce_file;
gint port_num;
gchar *endp;
ret = FALSE;
keys = NULL;
host = NULL;
port = NULL;
family = NULL;
nonce_file = NULL;
keys = g_hash_table_get_keys (key_value_pairs);
for (l = keys; l != NULL; l = l->next)
{
const gchar *key = l->data;
if (g_strcmp0 (key, "host") == 0)
host = g_hash_table_lookup (key_value_pairs, key);
else if (g_strcmp0 (key, "port") == 0)
port = g_hash_table_lookup (key_value_pairs, key);
else if (g_strcmp0 (key, "family") == 0)
family = g_hash_table_lookup (key_value_pairs, key);
else if (g_strcmp0 (key, "noncefile") == 0)
nonce_file = g_hash_table_lookup (key_value_pairs, key);
else
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Unsupported key `%s' in address entry `%s'"),
key,
address_entry);
goto out;
}
}
if (port != NULL)
{
port_num = strtol (port, &endp, 10);
if ((*port == '\0' || *endp != '\0') || port_num < 0 || port_num >= 65536)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Error in address `%s' - the port attribute is malformed"),
address_entry);
goto out;
}
}
if (family != NULL && !(g_strcmp0 (family, "ipv4") == 0 || g_strcmp0 (family, "ipv6") == 0))
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Error in address `%s' - the family attribute is malformed"),
address_entry);
goto out;
}
if (host != NULL)
{
/* TODO: validate host */
}
nonce_file = nonce_file; /* To avoid -Wunused-but-set-variable */
ret= TRUE;
out:
g_list_free (keys);
return ret;
}
static gboolean
is_valid_tcp (const gchar *address_entry,
GHashTable *key_value_pairs,
GError **error)
{
gboolean ret;
GList *keys;
GList *l;
const gchar *host;
const gchar *port;
const gchar *family;
gint port_num;
gchar *endp;
ret = FALSE;
keys = NULL;
host = NULL;
port = NULL;
family = NULL;
keys = g_hash_table_get_keys (key_value_pairs);
for (l = keys; l != NULL; l = l->next)
{
const gchar *key = l->data;
if (g_strcmp0 (key, "host") == 0)
host = g_hash_table_lookup (key_value_pairs, key);
else if (g_strcmp0 (key, "port") == 0)
port = g_hash_table_lookup (key_value_pairs, key);
else if (g_strcmp0 (key, "family") == 0)
family = g_hash_table_lookup (key_value_pairs, key);
else
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Unsupported key `%s' in address entry `%s'"),
key,
address_entry);
goto out;
}
}
if (port != NULL)
{
port_num = strtol (port, &endp, 10);
if ((*port == '\0' || *endp != '\0') || port_num < 0 || port_num >= 65536)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Error in address `%s' - the port attribute is malformed"),
address_entry);
goto out;
}
}
if (family != NULL && !(g_strcmp0 (family, "ipv4") == 0 || g_strcmp0 (family, "ipv6") == 0))
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Error in address `%s' - the family attribute is malformed"),
address_entry);
goto out;
}
if (host != NULL)
{
/* TODO: validate host */
}
ret= TRUE;
out:
g_list_free (keys);
return ret;
}
/**
* g_dbus_is_supported_address:
* @string: A string.
* @error: Return location for error or %NULL.
*
* Like g_dbus_is_address() but also checks if the library suppors the
* transports in @string and that key/value pairs for each transport
* are valid.
*
* Returns: %TRUE if @string is a valid D-Bus address that is
* supported by this library, %FALSE if @error is set.
*
* Since: 2.26
*/
gboolean
g_dbus_is_supported_address (const gchar *string,
GError **error)
{
guint n;
gchar **a;
gboolean ret;
ret = FALSE;
g_return_val_if_fail (string != NULL, FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
a = g_strsplit (string, ";", 0);
for (n = 0; a[n] != NULL; n++)
{
gchar *transport_name;
GHashTable *key_value_pairs;
gboolean supported;
if (!_g_dbus_address_parse_entry (a[n],
&transport_name,
&key_value_pairs,
error))
goto out;
supported = FALSE;
if (g_strcmp0 (transport_name, "unix") == 0)
supported = is_valid_unix (a[n], key_value_pairs, error);
else if (g_strcmp0 (transport_name, "tcp") == 0)
supported = is_valid_tcp (a[n], key_value_pairs, error);
else if (g_strcmp0 (transport_name, "nonce-tcp") == 0)
supported = is_valid_nonce_tcp (a[n], key_value_pairs, error);
else if (g_strcmp0 (a[n], "autolaunch:") == 0)
supported = TRUE;
g_free (transport_name);
g_hash_table_unref (key_value_pairs);
if (!supported)
goto out;
}
ret = TRUE;
out:
g_strfreev (a);
g_assert (ret || (!ret && (error == NULL || *error != NULL)));
return ret;
}
gboolean
_g_dbus_address_parse_entry (const gchar *address_entry,
gchar **out_transport_name,
GHashTable **out_key_value_pairs,
GError **error)
{
gboolean ret;
GHashTable *key_value_pairs;
gchar *transport_name;
gchar **kv_pairs;
const gchar *s;
guint n;
ret = FALSE;
kv_pairs = NULL;
transport_name = NULL;
key_value_pairs = NULL;
s = strchr (address_entry, ':');
if (s == NULL)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Address element `%s' does not contain a colon (:)"),
address_entry);
goto out;
}
transport_name = g_strndup (address_entry, s - address_entry);
key_value_pairs = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
kv_pairs = g_strsplit (s + 1, ",", 0);
for (n = 0; kv_pairs != NULL && kv_pairs[n] != NULL; n++)
{
const gchar *kv_pair = kv_pairs[n];
gchar *key;
gchar *value;
s = strchr (kv_pair, '=');
if (s == NULL)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Key/Value pair %d, `%s', in address element `%s' does not contain an equal sign"),
n,
kv_pair,
address_entry);
goto out;
}
key = g_uri_unescape_segment (kv_pair, s, NULL);
value = g_uri_unescape_segment (s + 1, kv_pair + strlen (kv_pair), NULL);
if (key == NULL || value == NULL)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Error unescaping key or value in Key/Value pair %d, `%s', in address element `%s'"),
n,
kv_pair,
address_entry);
g_free (key);
g_free (value);
goto out;
}
g_hash_table_insert (key_value_pairs, key, value);
}
ret = TRUE;
out:
g_strfreev (kv_pairs);
if (ret)
{
if (out_transport_name != NULL)
*out_transport_name = transport_name;
else
g_free (transport_name);
if (out_key_value_pairs != NULL)
*out_key_value_pairs = key_value_pairs;
else if (key_value_pairs != NULL)
g_hash_table_unref (key_value_pairs);
}
else
{
g_free (transport_name);
if (key_value_pairs != NULL)
g_hash_table_unref (key_value_pairs);
}
return ret;
}
/* ---------------------------------------------------------------------------------------------------- */
static GIOStream *
g_dbus_address_try_connect_one (const gchar *address_entry,
gchar **out_guid,
GCancellable *cancellable,
GError **error);
/* TODO: Declare an extension point called GDBusTransport (or similar)
* and move code below to extensions implementing said extension
* point. That way we can implement a D-Bus transport over X11 without
* making libgio link to libX11...
*/
static GIOStream *
g_dbus_address_connect (const gchar *address_entry,
const gchar *transport_name,
GHashTable *key_value_pairs,
GCancellable *cancellable,
GError **error)
{
GIOStream *ret;
GSocketConnectable *connectable;
const gchar *nonce_file;
connectable = NULL;
ret = NULL;
nonce_file = NULL;
if (FALSE)
{
}
#ifdef G_OS_UNIX
else if (g_strcmp0 (transport_name, "unix") == 0)
{
const gchar *path;
const gchar *abstract;
path = g_hash_table_lookup (key_value_pairs, "path");
abstract = g_hash_table_lookup (key_value_pairs, "abstract");
if ((path == NULL && abstract == NULL) || (path != NULL && abstract != NULL))
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Error in address `%s' - the unix transport requires exactly one of the "
"keys `path' or `abstract' to be set"),
address_entry);
}
else if (path != NULL)
{
connectable = G_SOCKET_CONNECTABLE (g_unix_socket_address_new (path));
}
else if (abstract != NULL)
{
connectable = G_SOCKET_CONNECTABLE (g_unix_socket_address_new_with_type (abstract,
-1,
G_UNIX_SOCKET_ADDRESS_ABSTRACT));
}
else
{
g_assert_not_reached ();
}
}
#endif
else if (g_strcmp0 (transport_name, "tcp") == 0 || g_strcmp0 (transport_name, "nonce-tcp") == 0)
{
const gchar *s;
const gchar *host;
glong port;
gchar *endp;
gboolean is_nonce;
is_nonce = (g_strcmp0 (transport_name, "nonce-tcp") == 0);
host = g_hash_table_lookup (key_value_pairs, "host");
if (host == NULL)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Error in address `%s' - the host attribute is missing or malformed"),
address_entry);
goto out;
}
s = g_hash_table_lookup (key_value_pairs, "port");
if (s == NULL)
s = "0";
port = strtol (s, &endp, 10);
if ((*s == '\0' || *endp != '\0') || port < 0 || port >= 65536)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Error in address `%s' - the port attribute is missing or malformed"),
address_entry);
goto out;
}
if (is_nonce)
{
nonce_file = g_hash_table_lookup (key_value_pairs, "noncefile");
if (nonce_file == NULL)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Error in address `%s' - the noncefile attribute is missing or malformed"),
address_entry);
goto out;
}
}
/* TODO: deal with family key/value-pair */
connectable = g_network_address_new (host, port);
}
else if (g_strcmp0 (address_entry, "autolaunch:") == 0)
{
gchar *autolaunch_address;
autolaunch_address = get_session_address_platform_specific (error);
if (autolaunch_address != NULL)
{
ret = g_dbus_address_try_connect_one (autolaunch_address, NULL, cancellable, error);
g_free (autolaunch_address);
goto out;
}
else
{
g_prefix_error (error, _("Error auto-launching: "));
}
}
else
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Unknown or unsupported transport `%s' for address `%s'"),
transport_name,
address_entry);
}
if (connectable != NULL)
{
GSocketClient *client;
GSocketConnection *connection;
g_assert (ret == NULL);
client = g_socket_client_new ();
connection = g_socket_client_connect (client,
connectable,
cancellable,
error);
g_object_unref (connectable);
g_object_unref (client);
if (connection == NULL)
goto out;
ret = G_IO_STREAM (connection);
if (nonce_file != NULL)
{
gchar nonce_contents[16 + 1];
size_t num_bytes_read;
FILE *f;
/* be careful to read only 16 bytes - we also check that the file is only 16 bytes long */
f = fopen (nonce_file, "rb");
if (f == NULL)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Error opening nonce file `%s': %s"),
nonce_file,
g_strerror (errno));
g_object_unref (ret);
ret = NULL;
goto out;
}
num_bytes_read = fread (nonce_contents,
sizeof (gchar),
16 + 1,
f);
if (num_bytes_read != 16)
{
if (num_bytes_read == 0)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Error reading from nonce file `%s': %s"),
nonce_file,
g_strerror (errno));
}
else
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Error reading from nonce file `%s', expected 16 bytes, got %d"),
nonce_file,
(gint) num_bytes_read);
}
g_object_unref (ret);
ret = NULL;
fclose (f);
goto out;
}
fclose (f);
if (!g_output_stream_write_all (g_io_stream_get_output_stream (ret),
nonce_contents,
16,
NULL,
cancellable,
error))
{
g_prefix_error (error, _("Error writing contents of nonce file `%s' to stream:"), nonce_file);
g_object_unref (ret);
ret = NULL;
goto out;
}
}
}
out:
return ret;
}
static GIOStream *
g_dbus_address_try_connect_one (const gchar *address_entry,
gchar **out_guid,
GCancellable *cancellable,
GError **error)
{
GIOStream *ret;
GHashTable *key_value_pairs;
gchar *transport_name;
const gchar *guid;
ret = NULL;
transport_name = NULL;
key_value_pairs = NULL;
if (!_g_dbus_address_parse_entry (address_entry,
&transport_name,
&key_value_pairs,
error))
goto out;
ret = g_dbus_address_connect (address_entry,
transport_name,
key_value_pairs,
cancellable,
error);
if (ret == NULL)
goto out;
guid = g_hash_table_lookup (key_value_pairs, "guid");
if (guid != NULL && out_guid != NULL)
*out_guid = g_strdup (guid);
out:
g_free (transport_name);
if (key_value_pairs != NULL)
g_hash_table_unref (key_value_pairs);
return ret;
}
/* ---------------------------------------------------------------------------------------------------- */
typedef struct {
gchar *address;
GIOStream *stream;
gchar *guid;
} GetStreamData;
static void
get_stream_data_free (GetStreamData *data)
{
g_free (data->address);
if (data->stream != NULL)
g_object_unref (data->stream);
g_free (data->guid);
g_free (data);
}
static void
get_stream_thread_func (GSimpleAsyncResult *res,
GObject *object,
GCancellable *cancellable)
{
GetStreamData *data;
GError *error;
data = g_simple_async_result_get_op_res_gpointer (res);
error = NULL;
data->stream = g_dbus_address_get_stream_sync (data->address,
&data->guid,
cancellable,
&error);
if (data->stream == NULL)
g_simple_async_result_take_error (res, error);
}
/**
* g_dbus_address_get_stream:
* @address: A valid D-Bus address.
* @cancellable: (allow-none): A #GCancellable or %NULL.
* @callback: A #GAsyncReadyCallback to call when the request is satisfied.
* @user_data: Data to pass to @callback.
*
* Asynchronously connects to an endpoint specified by @address and
* sets up the connection so it is in a state to run the client-side
* of the D-Bus authentication conversation.
*
* When the operation is finished, @callback will be invoked. You can
* then call g_dbus_address_get_stream_finish() to get the result of
* the operation.
*
* This is an asynchronous failable function. See
* g_dbus_address_get_stream_sync() for the synchronous version.
*
* Since: 2.26
*/
void
g_dbus_address_get_stream (const gchar *address,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GSimpleAsyncResult *res;
GetStreamData *data;
g_return_if_fail (address != NULL);
res = g_simple_async_result_new (NULL,
callback,
user_data,
g_dbus_address_get_stream);
g_simple_async_result_set_check_cancellable (res, cancellable);
data = g_new0 (GetStreamData, 1);
data->address = g_strdup (address);
g_simple_async_result_set_op_res_gpointer (res,
data,
(GDestroyNotify) get_stream_data_free);
g_simple_async_result_run_in_thread (res,
get_stream_thread_func,
G_PRIORITY_DEFAULT,
cancellable);
g_object_unref (res);
}
/**
* g_dbus_address_get_stream_finish:
* @res: A #GAsyncResult obtained from the GAsyncReadyCallback passed to g_dbus_address_get_stream().
* @out_guid: %NULL or return location to store the GUID extracted from @address, if any.
* @error: Return location for error or %NULL.
*
* Finishes an operation started with g_dbus_address_get_stream().
*
* Returns: (transfer full): A #GIOStream or %NULL if @error is set.
*
* Since: 2.26
*/
GIOStream *
g_dbus_address_get_stream_finish (GAsyncResult *res,
gchar **out_guid,
GError **error)
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
GetStreamData *data;
GIOStream *ret;
g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_dbus_address_get_stream);
ret = NULL;
data = g_simple_async_result_get_op_res_gpointer (simple);
if (g_simple_async_result_propagate_error (simple, error))
goto out;
ret = g_object_ref (data->stream);
if (out_guid != NULL)
*out_guid = g_strdup (data->guid);
out:
return ret;
}
/**
* g_dbus_address_get_stream_sync:
* @address: A valid D-Bus address.
* @out_guid: %NULL or return location to store the GUID extracted from @address, if any.
* @cancellable: (allow-none): A #GCancellable or %NULL.
* @error: Return location for error or %NULL.
*
* Synchronously connects to an endpoint specified by @address and
* sets up the connection so it is in a state to run the client-side
* of the D-Bus authentication conversation.
*
* This is a synchronous failable function. See
* g_dbus_address_get_stream() for the asynchronous version.
*
* Returns: (transfer full): A #GIOStream or %NULL if @error is set.
*
* Since: 2.26
*/
GIOStream *
g_dbus_address_get_stream_sync (const gchar *address,
gchar **out_guid,
GCancellable *cancellable,
GError **error)
{
GIOStream *ret;
gchar **addr_array;
guint n;
GError *last_error;
g_return_val_if_fail (address != NULL, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
ret = NULL;
last_error = NULL;
addr_array = g_strsplit (address, ";", 0);
if (addr_array != NULL && addr_array[0] == NULL)
{
last_error = g_error_new_literal (G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("The given address is empty"));
goto out;
}
for (n = 0; addr_array != NULL && addr_array[n] != NULL; n++)
{
const gchar *addr = addr_array[n];
GError *this_error;
this_error = NULL;
ret = g_dbus_address_try_connect_one (addr,
out_guid,
cancellable,
&this_error);
if (ret != NULL)
{
goto out;
}
else
{
g_assert (this_error != NULL);
if (last_error != NULL)
g_error_free (last_error);
last_error = this_error;
}
}
out:
if (ret != NULL)
{
if (last_error != NULL)
g_error_free (last_error);
}
else
{
g_assert (last_error != NULL);
g_propagate_error (error, last_error);
}
g_strfreev (addr_array);
return ret;
}
/* ---------------------------------------------------------------------------------------------------- */
#ifdef G_OS_UNIX
static gchar *
get_session_address_dbus_launch (GError **error)
{
gchar *ret;
gchar *machine_id;
gchar *command_line;
gchar *launch_stdout;
gchar *launch_stderr;
gint exit_status;
gchar *old_dbus_verbose;
gboolean restore_dbus_verbose;
ret = NULL;
machine_id = NULL;
command_line = NULL;
launch_stdout = NULL;
launch_stderr = NULL;
restore_dbus_verbose = FALSE;
old_dbus_verbose = NULL;
/* Don't run binaries as root if we're setuid. */
if (GLIB_PRIVATE_CALL (g_check_setuid) ())
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
_("Cannot spawn a message bus when setuid"));
goto out;
}
machine_id = _g_dbus_get_machine_id (error);
if (machine_id == NULL)
{
g_prefix_error (error, _("Cannot spawn a message bus without a machine-id: "));
goto out;
}
/* We're using private libdbus facilities here. When everything
* (X11, Mac OS X, Windows) is spec'ed out correctly (not even the
* X11 property is correctly documented right now) we should
* consider using the spec instead of dbus-launch.
*
* --autolaunch=MACHINEID
* This option implies that dbus-launch should scan for a previ‐
* ously-started session and reuse the values found there. If no
* session is found, it will start a new session. The --exit-with-
* session option is implied if --autolaunch is given. This option
* is for the exclusive use of libdbus, you do not want to use it
* manually. It may change in the future.
*/
/* TODO: maybe provide a variable for where to look for the dbus-launch binary? */
command_line = g_strdup_printf ("dbus-launch --autolaunch=%s --binary-syntax --close-stderr", machine_id);
if (G_UNLIKELY (_g_dbus_debug_address ()))
{
_g_dbus_debug_print_lock ();
g_print ("GDBus-debug:Address: Running `%s' to get bus address (possibly autolaunching)\n", command_line);
old_dbus_verbose = g_strdup (g_getenv ("DBUS_VERBOSE"));
restore_dbus_verbose = TRUE;
g_setenv ("DBUS_VERBOSE", "1", TRUE);
_g_dbus_debug_print_unlock ();
}
if (!g_spawn_command_line_sync (command_line,
&launch_stdout,
&launch_stderr,
&exit_status,
error))
{
goto out;
}
if (!g_spawn_check_exit_status (exit_status, error))
{
g_prefix_error (error, _("Error spawning command line `%s': "), command_line);
goto out;
}
/* From the dbus-launch(1) man page:
*
* --binary-syntax Write to stdout a nul-terminated bus address,
* then the bus PID as a binary integer of size sizeof(pid_t),
* then the bus X window ID as a binary integer of size
* sizeof(long). Integers are in the machine's byte order, not
* network byte order or any other canonical byte order.
*/
ret = g_strdup (launch_stdout);
out:
if (G_UNLIKELY (_g_dbus_debug_address ()))
{
gchar *s;
_g_dbus_debug_print_lock ();
g_print ("GDBus-debug:Address: dbus-launch output:");
if (launch_stdout != NULL)
{
s = _g_dbus_hexdump (launch_stdout, strlen (launch_stdout) + 1 + sizeof (pid_t) + sizeof (long), 2);
g_print ("\n%s", s);
g_free (s);
}
else
{
g_print (" (none)\n");
}
g_print ("GDBus-debug:Address: dbus-launch stderr output:");
if (launch_stderr != NULL)
g_print ("\n%s", launch_stderr);
else
g_print (" (none)\n");
_g_dbus_debug_print_unlock ();
}
g_free (machine_id);
g_free (command_line);
g_free (launch_stdout);
g_free (launch_stderr);
if (G_UNLIKELY (restore_dbus_verbose))
{
if (old_dbus_verbose != NULL)
g_setenv ("DBUS_VERBOSE", old_dbus_verbose, TRUE);
else
g_unsetenv ("DBUS_VERBOSE");
}
g_free (old_dbus_verbose);
return ret;
}
#endif
#ifdef G_OS_WIN32
#define DBUS_DAEMON_ADDRESS_INFO "DBusDaemonAddressInfo"
#define DBUS_DAEMON_MUTEX "DBusDaemonMutex"
#define UNIQUE_DBUS_INIT_MUTEX "UniqueDBusInitMutex"
#define DBUS_AUTOLAUNCH_MUTEX "DBusAutolaunchMutex"
static void
release_mutex (HANDLE mutex)
{
ReleaseMutex (mutex);
CloseHandle (mutex);
}
static HANDLE
acquire_mutex (const char *mutexname)
{
HANDLE mutex;
DWORD res;
mutex = CreateMutexA (NULL, FALSE, mutexname);
if (!mutex)
return 0;
res = WaitForSingleObject (mutex, INFINITE);
switch (res)
{
case WAIT_ABANDONED:
release_mutex (mutex);
return 0;
case WAIT_FAILED:
case WAIT_TIMEOUT:
return 0;
}
return mutex;
}
static gboolean
is_mutex_owned (const char *mutexname)
{
HANDLE mutex;
gboolean res = FALSE;
mutex = CreateMutexA (NULL, FALSE, mutexname);
if (WaitForSingleObject (mutex, 10) == WAIT_TIMEOUT)
res = TRUE;
else
ReleaseMutex (mutex);
CloseHandle (mutex);
return res;
}
static char *
read_shm (const char *shm_name)
{
HANDLE shared_mem;
char *shared_data;
char *res;
int i;
res = NULL;
for (i = 0; i < 20; i++)
{
shared_mem = OpenFileMappingA (FILE_MAP_READ, FALSE, shm_name);
if (shared_mem != 0)
break;
Sleep (100);
}
if (shared_mem != 0)
{
shared_data = MapViewOfFile (shared_mem, FILE_MAP_READ, 0, 0, 0);
if (shared_data != NULL)
{
res = g_strdup (shared_data);
UnmapViewOfFile (shared_data);
}
CloseHandle (shared_mem);
}
return res;
}
static HANDLE
set_shm (const char *shm_name, const char *value)
{
HANDLE shared_mem;
char *shared_data;
shared_mem = CreateFileMappingA (INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE,
0, strlen (value) + 1, shm_name);
if (shared_mem == 0)
return 0;
shared_data = MapViewOfFile (shared_mem, FILE_MAP_WRITE, 0, 0, 0 );
if (shared_data == NULL)
return 0;
strcpy (shared_data, value);
UnmapViewOfFile (shared_data);
return shared_mem;
}
/* These keep state between publish_session_bus and unpublish_session_bus */
static HANDLE published_daemon_mutex;
static HANDLE published_shared_mem;
static gboolean
publish_session_bus (const char *address)
{
HANDLE init_mutex;
init_mutex = acquire_mutex (UNIQUE_DBUS_INIT_MUTEX);
published_daemon_mutex = CreateMutexA (NULL, FALSE, DBUS_DAEMON_MUTEX);
if (WaitForSingleObject (published_daemon_mutex, 10 ) != WAIT_OBJECT_0)
{
release_mutex (init_mutex);
CloseHandle (published_daemon_mutex);
published_daemon_mutex = NULL;
return FALSE;
}
published_shared_mem = set_shm (DBUS_DAEMON_ADDRESS_INFO, address);
if (!published_shared_mem)
{
release_mutex (init_mutex);
CloseHandle (published_daemon_mutex);
published_daemon_mutex = NULL;
return FALSE;
}
release_mutex (init_mutex);
return TRUE;
}
static void
unpublish_session_bus (void)
{
HANDLE init_mutex;
init_mutex = acquire_mutex (UNIQUE_DBUS_INIT_MUTEX);
CloseHandle (published_shared_mem);
published_shared_mem = NULL;
release_mutex (published_daemon_mutex);
published_daemon_mutex = NULL;
release_mutex (init_mutex);
}
static void
wait_console_window (void)
{
FILE *console = fopen ("CONOUT$", "w");
SetConsoleTitleW (L"gdbus-daemon output. Type any character to close this window.");
fprintf (console, _("(Type any character to close this window)\n"));
fflush (console);
_getch ();
}
static void
open_console_window (void)
{
if (((HANDLE) _get_osfhandle (fileno (stdout)) == INVALID_HANDLE_VALUE ||
(HANDLE) _get_osfhandle (fileno (stderr)) == INVALID_HANDLE_VALUE) && AllocConsole ())
{
if ((HANDLE) _get_osfhandle (fileno (stdout)) == INVALID_HANDLE_VALUE)
freopen ("CONOUT$", "w", stdout);
if ((HANDLE) _get_osfhandle (fileno (stderr)) == INVALID_HANDLE_VALUE)
freopen ("CONOUT$", "w", stderr);
SetConsoleTitleW (L"gdbus-daemon debug output.");
atexit (wait_console_window);
}
}
static void
idle_timeout_cb (GDBusDaemon *daemon, gpointer user_data)
{
GMainLoop *loop = user_data;
g_main_loop_quit (loop);
}
__declspec(dllexport) void CALLBACK g_win32_run_session_bus (HWND hwnd, HINSTANCE hinst, char *cmdline, int nCmdShow);
__declspec(dllexport) void CALLBACK
g_win32_run_session_bus (HWND hwnd, HINSTANCE hinst, char *cmdline, int nCmdShow)
{
GDBusDaemon *daemon;
GMainLoop *loop;
const char *address;
GError *error = NULL;
if (g_getenv ("GDBUS_DAEMON_DEBUG") != NULL)
open_console_window ();
loop = g_main_loop_new (NULL, FALSE);
address = "nonce-tcp:";
daemon = _g_dbus_daemon_new (address, NULL, &error);
if (daemon == NULL)
{
g_printerr ("Can't init bus: %s\n", error->message);
return;
}
g_signal_connect (daemon, "idle-timeout", G_CALLBACK (idle_timeout_cb), loop);
if ( publish_session_bus (_g_dbus_daemon_get_address (daemon)))
{
g_main_loop_run (loop);
unpublish_session_bus ();
}
g_main_loop_unref (loop);
g_object_unref (daemon);
}
static gchar *
get_session_address_dbus_launch (GError **error)
{
HANDLE autolaunch_mutex, init_mutex;
char *address = NULL;
wchar_t gio_path[MAX_PATH+1+200];
autolaunch_mutex = acquire_mutex (DBUS_AUTOLAUNCH_MUTEX);
init_mutex = acquire_mutex (UNIQUE_DBUS_INIT_MUTEX);
if (is_mutex_owned (DBUS_DAEMON_MUTEX))
address = read_shm (DBUS_DAEMON_ADDRESS_INFO);
release_mutex (init_mutex);
if (address == NULL)
{
gio_path[MAX_PATH] = 0;
if (GetModuleFileNameW (_g_io_win32_get_module (), gio_path, MAX_PATH))
{
PROCESS_INFORMATION pi = { 0 };
STARTUPINFOW si = { 0 };
BOOL res;
wchar_t gio_path_short[MAX_PATH];
wchar_t rundll_path[MAX_PATH*2];
wchar_t args[MAX_PATH*4];
GetShortPathNameW (gio_path, gio_path_short, MAX_PATH);
GetWindowsDirectoryW (rundll_path, MAX_PATH);
wcscat (rundll_path, L"\\rundll32.exe");
if (GetFileAttributesW (rundll_path) == INVALID_FILE_ATTRIBUTES)
{
GetSystemDirectoryW (rundll_path, MAX_PATH);
wcscat (rundll_path, L"\\rundll32.exe");
}
wcscpy (args, L"\"");
wcscat (args, rundll_path);
wcscat (args, L"\" ");
wcscat (args, gio_path_short);
wcscat (args, L",g_win32_run_session_bus@16");
res = CreateProcessW (rundll_path, args,
0, 0, FALSE,
NORMAL_PRIORITY_CLASS | CREATE_NO_WINDOW | DETACHED_PROCESS,
0, NULL /* TODO: Should be root */,
&si, &pi);
if (res)
address = read_shm (DBUS_DAEMON_ADDRESS_INFO);
}
}
release_mutex (autolaunch_mutex);
if (address == NULL)
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_FAILED,
_("Session dbus not running, and autolaunch failed"));
return address;
}
#endif
/* ---------------------------------------------------------------------------------------------------- */
static gchar *
get_session_address_platform_specific (GError **error)
{
gchar *ret;
#if defined (G_OS_UNIX) || defined(G_OS_WIN32)
/* need to handle OS X in a different way since `dbus-launch --autolaunch' probably won't work there */
ret = get_session_address_dbus_launch (error);
#else
/* TODO: implement for OS X */
ret = NULL;
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_FAILED,
_("Cannot determine session bus address (not implemented for this OS)"));
#endif
return ret;
}
/* ---------------------------------------------------------------------------------------------------- */
/**
* g_dbus_address_get_for_bus_sync:
* @bus_type: A #GBusType.
* @cancellable: (allow-none): A #GCancellable or %NULL.
* @error: Return location for error or %NULL.
*
* Synchronously looks up the D-Bus address for the well-known message
* bus instance specified by @bus_type. This may involve using various
* platform specific mechanisms.
*
* Returns: A valid D-Bus address string for @bus_type or %NULL if @error is set.
*
* Since: 2.26
*/
gchar *
g_dbus_address_get_for_bus_sync (GBusType bus_type,
GCancellable *cancellable,
GError **error)
{
gchar *ret;
const gchar *starter_bus;
GError *local_error;
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
ret = NULL;
local_error = NULL;
if (G_UNLIKELY (_g_dbus_debug_address ()))
{
guint n;
_g_dbus_debug_print_lock ();
g_print ("GDBus-debug:Address: In g_dbus_address_get_for_bus_sync() for bus type `%s'\n",
_g_dbus_enum_to_string (G_TYPE_BUS_TYPE, bus_type));
for (n = 0; n < 3; n++)
{
const gchar *k;
const gchar *v;
switch (n)
{
case 0: k = "DBUS_SESSION_BUS_ADDRESS"; break;
case 1: k = "DBUS_SYSTEM_BUS_ADDRESS"; break;
case 2: k = "DBUS_STARTER_BUS_TYPE"; break;
default: g_assert_not_reached ();
}
v = g_getenv (k);
g_print ("GDBus-debug:Address: env var %s", k);
if (v != NULL)
g_print ("=`%s'\n", v);
else
g_print (" is not set\n");
}
_g_dbus_debug_print_unlock ();
}
switch (bus_type)
{
case G_BUS_TYPE_SYSTEM:
ret = g_strdup (g_getenv ("DBUS_SYSTEM_BUS_ADDRESS"));
if (ret == NULL)
{
ret = g_strdup ("unix:path=/var/run/dbus/system_bus_socket");
}
break;
case G_BUS_TYPE_SESSION:
ret = g_strdup (g_getenv ("DBUS_SESSION_BUS_ADDRESS"));
if (ret == NULL)
{
ret = get_session_address_platform_specific (&local_error);
}
break;
case G_BUS_TYPE_STARTER:
starter_bus = g_getenv ("DBUS_STARTER_BUS_TYPE");
if (g_strcmp0 (starter_bus, "session") == 0)
{
ret = g_dbus_address_get_for_bus_sync (G_BUS_TYPE_SESSION, cancellable, &local_error);
goto out;
}
else if (g_strcmp0 (starter_bus, "system") == 0)
{
ret = g_dbus_address_get_for_bus_sync (G_BUS_TYPE_SYSTEM, cancellable, &local_error);
goto out;
}
else
{
if (starter_bus != NULL)
{
g_set_error (&local_error,
G_IO_ERROR,
G_IO_ERROR_FAILED,
_("Cannot determine bus address from DBUS_STARTER_BUS_TYPE environment variable"
" - unknown value `%s'"),
starter_bus);
}
else
{
g_set_error_literal (&local_error,
G_IO_ERROR,
G_IO_ERROR_FAILED,
_("Cannot determine bus address because the DBUS_STARTER_BUS_TYPE environment "
"variable is not set"));
}
}
break;
default:
g_set_error (&local_error,
G_IO_ERROR,
G_IO_ERROR_FAILED,
_("Unknown bus type %d"),
bus_type);
break;
}
out:
if (G_UNLIKELY (_g_dbus_debug_address ()))
{
_g_dbus_debug_print_lock ();
if (ret != NULL)
{
g_print ("GDBus-debug:Address: Returning address `%s' for bus type `%s'\n",
ret,
_g_dbus_enum_to_string (G_TYPE_BUS_TYPE, bus_type));
}
else
{
g_print ("GDBus-debug:Address: Cannot look-up address bus type `%s': %s\n",
_g_dbus_enum_to_string (G_TYPE_BUS_TYPE, bus_type),
local_error ? local_error->message : "");
}
_g_dbus_debug_print_unlock ();
}
if (local_error != NULL)
g_propagate_error (error, local_error);
return ret;
}
Reference in New Issue View Git Blame Copy Permalink