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/*
* Copyright (C) 2010-2016 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version. See http://www.gnu.org/copyleft/gpl.html the full text of the
* license.
*/
#include <config.h>
#include <errno.h>
#include <sys/stat.h>
#include <gio/gio.h>
#include <gio/gunixsocketaddress.h>
#include "greeter-socket.h"
enum {
CREATE_GREETER,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
struct GreeterSocketPrivate
{
/* Path of socket to use */
gchar *path;
/* Listening UNIX socket */
GSocket *socket;
/* Source for listening for connections */
GSource *source;
/* Socket to greeter */
GSocket *greeter_socket;
/* Greeter connected on this socket */
Greeter *greeter;
};
G_DEFINE_TYPE (GreeterSocket, greeter_socket, G_TYPE_OBJECT);
GreeterSocket *
greeter_socket_new (const gchar *path)
{
GreeterSocket *socket;
socket = g_object_new (GREETER_SOCKET_TYPE, NULL);
socket->priv->path = g_strdup (path);
return socket;
}
static void
greeter_disconnected_cb (Greeter *greeter, GreeterSocket *socket)
{
if (greeter == socket->priv->greeter)
{
g_clear_object (&socket->priv->greeter);
g_clear_object (&socket->priv->greeter_socket);
}
}
static gboolean
greeter_connect_cb (GSocket *s, GIOCondition condition, GreeterSocket *socket)
{
GSocket *new_socket;
GError *error = NULL;
new_socket = g_socket_accept (socket->priv->socket, NULL, &error);
if (error)
g_warning ("Failed to accept greeter connection: %s", error->message);
g_clear_error (&error);
if (!new_socket)
return G_SOURCE_CONTINUE;
/* Greeter already connected */
if (socket->priv->greeter)
{
g_socket_close (new_socket, NULL);
g_object_unref (new_socket);
return G_SOURCE_CONTINUE;
}
socket->priv->greeter_socket = new_socket;
g_signal_emit (socket, signals[CREATE_GREETER], 0, &socket->priv->greeter);
g_signal_connect (socket->priv->greeter, GREETER_SIGNAL_DISCONNECTED, G_CALLBACK (greeter_disconnected_cb), socket);
greeter_set_file_descriptors (socket->priv->greeter, g_socket_get_fd (new_socket), g_socket_get_fd (new_socket));
return G_SOURCE_CONTINUE;
}
gboolean
greeter_socket_start (GreeterSocket *socket, GError **error)
{
GSocketAddress *address;
gboolean result;
g_return_val_if_fail (socket != NULL, FALSE);
g_return_val_if_fail (socket->priv->socket == NULL, FALSE);
socket->priv->socket = g_socket_new (G_SOCKET_FAMILY_UNIX, G_SOCKET_TYPE_STREAM, G_SOCKET_PROTOCOL_DEFAULT, error);
if (!socket->priv->socket)
return FALSE;
unlink (socket->priv->path);
address = g_unix_socket_address_new (socket->priv->path);
result = g_socket_bind (socket->priv->socket, address, FALSE, error);
g_object_unref (address);
if (!result)
return FALSE;
if (!g_socket_listen (socket->priv->socket, error))
return FALSE;
socket->priv->source = g_socket_create_source (socket->priv->socket, G_IO_IN, NULL);
g_source_set_callback (socket->priv->source, (GSourceFunc) greeter_connect_cb, socket, NULL);
g_source_attach (socket->priv->source, NULL);
/* Allow to be written to */
if (chmod (socket->priv->path, S_IRWXU | S_IRWXG | S_IRWXO) < 0)
{
g_set_error (error,
G_FILE_ERROR,
g_file_error_from_errno (errno),
"Failed to set permissions on greeter socket %s: %s",
socket->priv->path,
g_strerror (errno));
return FALSE;
}
return TRUE;
}
static void
greeter_socket_init (GreeterSocket *socket)
{
socket->priv = G_TYPE_INSTANCE_GET_PRIVATE (socket, GREETER_SOCKET_TYPE, GreeterSocketPrivate);
}
static void
greeter_socket_finalize (GObject *object)
{
GreeterSocket *self = GREETER_SOCKET (object);
if (self->priv->path)
unlink (self->priv->path);
g_free (self->priv->path);
g_clear_object (&self->priv->socket);
g_clear_object (&self->priv->source);
g_clear_object (&self->priv->greeter_socket);
g_clear_object (&self->priv->greeter);
G_OBJECT_CLASS (greeter_socket_parent_class)->finalize (object);
}
static void
greeter_socket_class_init (GreeterSocketClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = greeter_socket_finalize;
signals[CREATE_GREETER] =
g_signal_new (GREETER_SOCKET_SIGNAL_CREATE_GREETER,
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GreeterSocketClass, create_greeter),
g_signal_accumulator_first_wins,
NULL,
NULL,
GREETER_TYPE, 0);
g_type_class_add_private (klass, sizeof (GreeterSocketPrivate));
}
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