Ejemplo n.º 1
0
static gboolean
initable_init (GInitable     *initable,
               GCancellable  *cancellable,
               GError       **error)
{
  g_debug (G_STRLOC ": %s", G_STRFUNC);

  DasomServer    *server = DASOM_SERVER (initable);
  GSocketAddress *address;
  GError         *local_error = NULL;

  server->listener = G_SOCKET_LISTENER (g_socket_service_new ());
  /* server->listener = G_SOCKET_LISTENER (g_threaded_socket_service_new (-1)); */

  if (g_unix_socket_address_abstract_names_supported ())
    address = g_unix_socket_address_new_with_type (server->address, -1,
                                                   G_UNIX_SOCKET_ADDRESS_ABSTRACT);
  else
  {
    g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
                         "Abstract UNIX domain socket names are not supported.");
    return FALSE;
  }

  g_socket_listener_add_address (server->listener, address,
                                 G_SOCKET_TYPE_STREAM,
                                 G_SOCKET_PROTOCOL_DEFAULT,
                                 NULL, NULL, &local_error);
  g_object_unref (address);

  if (local_error)
  {
    g_propagate_error (error, local_error);
    return FALSE;
  }

  server->is_using_listener = TRUE;
  server->run_signal_handler_id =
    g_signal_connect (G_SOCKET_SERVICE (server->listener), "incoming",
                      (GCallback) on_new_connection, server);
/*
  server->run_signal_handler_id = g_signal_connect (G_SOCKET_SERVICE (server->listener),
                                                    "run",
                                                    G_CALLBACK (on_run),
                                                    server);
*/

  return TRUE;
}
Ejemplo n.º 2
0
GSocketAddress *
socket_address_from_string (const char *name)
{
#ifdef G_OS_UNIX
  int i, len;

  for (i = 0; i < G_N_ELEMENTS (unix_socket_address_types); i++)
    {
      len = strlen (unix_socket_address_types[i]);
      if (!strncmp (name, unix_socket_address_types[i], len) &&
	  name[len] == ':')
	{
	  return g_unix_socket_address_new_with_type (name + len + 1, -1,
						      (GUnixSocketAddressType)i);
	}
    }
#endif
  return NULL;
}
Ejemplo n.º 3
0
static void
use_unix_address (gboolean synchronous)
{
  GSocketAddressEnumerator *enumerator;
  GSocketAddress *sockaddr;

  sockaddr = g_unix_socket_address_new_with_type (info, -1, G_UNIX_SOCKET_ADDRESS_ABSTRACT);

  if (sockaddr == NULL)
    {
      fprintf (stderr, "Failed to create unix socket with name '%s'\n", info);
      return_value = 1;
      return;
    }

  enumerator =
    g_socket_connectable_proxy_enumerate (G_SOCKET_CONNECTABLE (sockaddr));
  g_object_unref (sockaddr);

  printf ("Proxies for path '%s' are:\n", info);
  run_with_enumerator (synchronous, enumerator);

  g_object_unref (enumerator);
}
Ejemplo n.º 4
0
/* note that address_entry has already been validated => exactly one of path, tmpdir or abstract keys are set */
static gboolean
try_unix (GDBusServer  *server,
          const gchar  *address_entry,
          GHashTable   *key_value_pairs,
          GError      **error)
{
  gboolean ret;
  const gchar *path;
  const gchar *tmpdir;
  const gchar *abstract;
  GSocketAddress *address;

  ret = FALSE;
  address = NULL;

  path = g_hash_table_lookup (key_value_pairs, "path");
  tmpdir = g_hash_table_lookup (key_value_pairs, "tmpdir");
  abstract = g_hash_table_lookup (key_value_pairs, "abstract");

  if (path != NULL)
    {
      address = g_unix_socket_address_new (path);
    }
  else if (tmpdir != NULL)
    {
      gint n;
      GString *s;
      GError *local_error;

    retry:
      s = g_string_new (tmpdir);
      g_string_append (s, "/dbus-");
      for (n = 0; n < 8; n++)
        g_string_append_c (s, random_ascii ());

      /* prefer abstract namespace if available */
      if (g_unix_socket_address_abstract_names_supported ())
        address = g_unix_socket_address_new_with_type (s->str,
                                                       -1,
                                                       G_UNIX_SOCKET_ADDRESS_ABSTRACT);
      else
        address = g_unix_socket_address_new (s->str);
      g_string_free (s, TRUE);

      local_error = NULL;
      if (!g_socket_listener_add_address (server->listener,
                                          address,
                                          G_SOCKET_TYPE_STREAM,
                                          G_SOCKET_PROTOCOL_DEFAULT,
                                          NULL, /* source_object */
                                          NULL, /* effective_address */
                                          &local_error))
        {
          if (local_error->domain == G_IO_ERROR && local_error->code == G_IO_ERROR_ADDRESS_IN_USE)
            {
              g_error_free (local_error);
              goto retry;
            }
          g_propagate_error (error, local_error);
          goto out;
        }
      ret = TRUE;
      goto out;
    }
  else if (abstract != NULL)
    {
      if (!g_unix_socket_address_abstract_names_supported ())
        {
          g_set_error_literal (error,
                               G_IO_ERROR,
                               G_IO_ERROR_NOT_SUPPORTED,
                               _("Abstract name space not supported"));
          goto out;
        }
      address = g_unix_socket_address_new_with_type (abstract,
                                                     -1,
                                                     G_UNIX_SOCKET_ADDRESS_ABSTRACT);
    }
  else
    {
      g_assert_not_reached ();
    }

  if (!g_socket_listener_add_address (server->listener,
                                      address,
                                      G_SOCKET_TYPE_STREAM,
                                      G_SOCKET_PROTOCOL_DEFAULT,
                                      NULL, /* source_object */
                                      NULL, /* effective_address */
                                      error))
    goto out;

  ret = TRUE;

 out:

  if (address != NULL)
    {
      /* Fill out client_address if the connection attempt worked */
      if (ret)
        {
          server->is_using_listener = TRUE;

          switch (g_unix_socket_address_get_address_type (G_UNIX_SOCKET_ADDRESS (address)))
            {
            case G_UNIX_SOCKET_ADDRESS_ABSTRACT:
              server->client_address = g_strdup_printf ("unix:abstract=%s",
                                                        g_unix_socket_address_get_path (G_UNIX_SOCKET_ADDRESS (address)));
              break;

            case G_UNIX_SOCKET_ADDRESS_PATH:
              server->client_address = g_strdup_printf ("unix:path=%s",
                                                        g_unix_socket_address_get_path (G_UNIX_SOCKET_ADDRESS (address)));
              break;

            default:
              g_assert_not_reached ();
              break;
            }
        }
      g_object_unref (address);
    }
  return ret;
}
Ejemplo n.º 5
0
int
main (int argc, char *argv[])
{
  GError *error = NULL;
  GOptionContext *context;
  GMainLoop *loop;
  GSocketAddress *address;
  GSocketService *listener;
  char *path, *base;
  char *http_address = NULL;
  int http_port = 0;
  int display = 1;
  const GOptionEntry entries[] = {
    { "port", 'p', 0, G_OPTION_ARG_INT, &http_port, "Httpd port", "PORT" },
    { "address", 'a', 0, G_OPTION_ARG_STRING, &http_address, "Ip address to bind to ", "ADDRESS" },
    { NULL }
  };

  context = g_option_context_new ("[:DISPLAY] - broadway display daemon");
  g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
  if (!g_option_context_parse (context, &argc, &argv, &error))
    {
      g_printerr ("option parsing failed: %s\n", error->message);
      exit (1);
    }

  if (argc > 1)
    {
      if (*argv[1] != ':')
	{
	  g_printerr ("Usage broadwayd [:DISPLAY]\n");
	  exit (1);
	}
      display = strtol(argv[1]+1, NULL, 10);
      if (display == 0)
	{
	  g_printerr ("Failed to parse display num %s\n", argv[1]);
	  exit (1);
	}
    }

  if (http_port == 0)
    http_port = 8080 + (display - 1);

  server = broadway_server_new (http_address, http_port, &error);
  if (server == NULL)
    {
      g_printerr ("%s\n", error->message);
      return 1;
    }

  base = g_strdup_printf ("broadway%d.socket", display);
  path = g_build_filename (g_get_user_runtime_dir (), base, NULL);
  g_free (base);
  g_print ("Listening on %s\n", path);
  address = g_unix_socket_address_new_with_type (path, -1,
						 G_UNIX_SOCKET_ADDRESS_ABSTRACT);
  g_free (path);

  listener = g_socket_service_new ();
  if (!g_socket_listener_add_address (G_SOCKET_LISTENER (listener),
				      address,
				      G_SOCKET_TYPE_STREAM,
				      G_SOCKET_PROTOCOL_DEFAULT,
				      G_OBJECT (server),
				      NULL,
				      &error))
    {
      g_printerr ("Can't listen: %s\n", error->message);
      return 1;
    }
  g_object_unref (address);

  g_signal_connect (listener, "incoming", G_CALLBACK (incoming_client), NULL);

  g_socket_service_start (G_SOCKET_SERVICE (listener));

  loop = g_main_loop_new (NULL, FALSE);
  g_main_loop_run (loop);
  
  return 0;
}
Ejemplo n.º 6
0
int
main (int argc, char *argv[])
{
  GError *error = NULL;
  GOptionContext *context;
  GMainLoop *loop;
  GInetAddress *inet;
  GSocketAddress *address;
  GSocketService *listener;
  char *path, *basename;
  char *http_address = NULL;
  char *unixsocket_address = NULL;
  int http_port = 0;
  char *ssl_cert = NULL;
  char *ssl_key = NULL;
  char *display;
  int port = 0;
  const GOptionEntry entries[] = {
    { "port", 'p', 0, G_OPTION_ARG_INT, &http_port, "Httpd port", "PORT" },
    { "address", 'a', 0, G_OPTION_ARG_STRING, &http_address, "Ip address to bind to ", "ADDRESS" },
#ifdef G_OS_UNIX
    { "unixsocket", 'u', 0, G_OPTION_ARG_STRING, &unixsocket_address, "Unix domain socket address", "ADDRESS" },
#endif
    { "cert", 'c', 0, G_OPTION_ARG_STRING, &ssl_cert, "SSL certificate path", "PATH" },
    { "key", 'k', 0, G_OPTION_ARG_STRING, &ssl_key, "SSL key path", "PATH" },
    { NULL }
  };

  setlocale (LC_ALL, "");

  context = g_option_context_new ("[:DISPLAY] - broadway display daemon");
  g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
  if (!g_option_context_parse (context, &argc, &argv, &error))
    {
      g_printerr ("option parsing failed: %s\n", error->message);
      exit (1);
    }

  display = NULL;
  if (argc > 1)
    {
      if (*argv[1] != ':')
	{
	  g_printerr ("Usage broadwayd [:DISPLAY]\n");
	  exit (1);
	}
      display = argv[1];
    }

  if (display == NULL)
    {
#ifdef G_OS_UNIX
      if (g_unix_socket_address_abstract_names_supported ())
        display = ":0";
      else
#endif
        display = ":tcp";
    }

  if (g_str_has_prefix (display, ":tcp"))
    {
      port = strtol (display + strlen (":tcp"), NULL, 10);

      inet = g_inet_address_new_from_string ("127.0.0.1");
      g_print ("Listening on 127.0.0.1:%d\n", port + 9090);
      address = g_inet_socket_address_new (inet, port + 9090);
      g_object_unref (inet);
    }
#ifdef G_OS_UNIX
  else if (display[0] == ':' && g_ascii_isdigit(display[1]))
    {
      port = strtol (display + strlen (":"), NULL, 10);
      basename = g_strdup_printf ("broadway%d.socket", port + 1);
      path = g_build_filename (g_get_user_runtime_dir (), basename, NULL);
      g_free (basename);

      g_print ("Listening on %s\n", path);
      address = g_unix_socket_address_new_with_type (path, -1,
						     G_UNIX_SOCKET_ADDRESS_ABSTRACT);
      g_free (path);
    }
#endif
  else
    {
      g_printerr ("Failed to parse display %s\n", display);
      exit (1);
    }

  if (http_port == 0)
    http_port = 8080 + port;

  if (unixsocket_address != NULL)
    server = broadway_server_on_unix_socket_new (unixsocket_address, &error);
  else
    server = broadway_server_new (http_address,
                                  http_port,
                                  ssl_cert,
                                  ssl_key,
                                  &error);

  if (server == NULL)
    {
      g_printerr ("%s\n", error->message);
      return 1;
    }

  listener = g_socket_service_new ();
  if (!g_socket_listener_add_address (G_SOCKET_LISTENER (listener),
				      address,
				      G_SOCKET_TYPE_STREAM,
				      G_SOCKET_PROTOCOL_DEFAULT,
				      G_OBJECT (server),
				      NULL,
				      &error))
    {
      g_printerr ("Can't listen: %s\n", error->message);
      return 1;
    }
  g_object_unref (address);
  g_signal_connect (listener, "incoming", G_CALLBACK (incoming_client), NULL);

  g_socket_service_start (G_SOCKET_SERVICE (listener));

  loop = g_main_loop_new (NULL, FALSE);
  g_main_loop_run (loop);
  
  return 0;
}
Ejemplo n.º 7
0
static void
dasom_im_init (DasomIM *im)
{
  g_debug (G_STRLOC ": %s", G_STRFUNC);

  GSocketClient  *client;
  GSocketAddress *address;
  GSocket        *socket;
  GError         *error = NULL;

  address = g_unix_socket_address_new_with_type (DASOM_ADDRESS, -1,
                                                 G_UNIX_SOCKET_ADDRESS_ABSTRACT);
  client = g_socket_client_new ();
  im->connection = g_socket_client_connect (client,
                                            G_SOCKET_CONNECTABLE (address),
                                            NULL, &error);
  g_object_unref (address);
  g_object_unref (client);

  if (im->connection == NULL)
  {
    g_critical (G_STRLOC ": %s: %s", G_STRFUNC, error->message);
    g_clear_error (&error);
    return;
  }

  socket = g_socket_connection_get_socket (im->connection);

  if (!socket)
  {
    g_critical (G_STRLOC ": %s: %s", G_STRFUNC, "Can't get socket");
    return;
  }

  DasomMessage *message;

  DasomConnectionType type = DASOM_CONNECTION_DASOM_IM;

  dasom_send_message (socket, DASOM_MESSAGE_CONNECT, &type, sizeof (DasomConnectionType), NULL);
  g_socket_condition_wait (socket, G_IO_IN, NULL, NULL);
  message = dasom_recv_message (socket);

  if (G_UNLIKELY (message == NULL ||
                  message->header->type != DASOM_MESSAGE_CONNECT_REPLY))
  {
    dasom_message_unref (message);
    g_error ("Couldn't connect to dasom daemon");
  }

  dasom_message_unref (message);

  im->result = g_slice_new0 (DasomResult);
  im->preedit_string = g_strdup ("");

  GMutex mutex;

  g_mutex_init (&mutex);
  g_mutex_lock (&mutex);

  if (G_UNLIKELY (dasom_im_sockets_context == NULL))
  {
    dasom_im_sockets_context = g_main_context_new ();
    dasom_im_sockets_context_ref_count++;
  }
  else
  {
    dasom_im_sockets_context = g_main_context_ref (dasom_im_sockets_context);
    dasom_im_sockets_context_ref_count++;
  }

  g_mutex_unlock (&mutex);

  /* when g_main_context_iteration(), iterate only sockets */
  im->sockets_context_source = g_socket_create_source (socket, G_IO_IN, NULL);
  g_source_set_can_recurse (im->sockets_context_source, TRUE);
  g_source_attach (im->sockets_context_source, dasom_im_sockets_context);
  g_source_set_callback (im->sockets_context_source,
                         (GSourceFunc) on_incoming_message,
                         im, NULL);

  im->default_context_source = g_socket_create_source (socket, G_IO_IN, NULL);
  g_source_set_can_recurse (im->default_context_source, TRUE);
  g_source_set_callback (im->default_context_source,
                         (GSourceFunc) on_incoming_message, im, NULL);
  g_source_attach (im->default_context_source, NULL);
}
Ejemplo n.º 8
0
/* 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;
}
Ejemplo n.º 9
0
/* 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;
      guint 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 */
      connectable = g_network_address_new (host, port);
    }
  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;
          gsize nonce_length;

          /* TODO: too dangerous to read the entire file? (think denial-of-service etc.) */
          if (!g_file_get_contents (nonce_file,
                                    &nonce_contents,
                                    &nonce_length,
                                    error))
            {
              g_prefix_error (error, _("Error reading nonce file `%s':"), nonce_file);
              g_object_unref (ret);
              ret = NULL;
              goto out;
            }

          if (nonce_length != 16)
            {
              g_set_error (error,
                           G_IO_ERROR,
                           G_IO_ERROR_INVALID_ARGUMENT,
                           _("The nonce-file `%s' was %" G_GSIZE_FORMAT " bytes. Expected 16 bytes."),
                           nonce_file,
                           nonce_length);
              g_free (nonce_contents);
              g_object_unref (ret);
              ret = NULL;
              goto out;
            }

          if (!g_output_stream_write_all (g_io_stream_get_output_stream (ret),
                                          nonce_contents,
                                          nonce_length,
                                          NULL,
                                          cancellable,
                                          error))
            {
              g_prefix_error (error, _("Error write contents of nonce file `%s' to stream:"), nonce_file);
              g_object_unref (ret);
              ret = NULL;
              g_free (nonce_contents);
              goto out;
            }
          g_free (nonce_contents);
        }
    }

 out:

  return ret;
}