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/* -*- Mode: C; indent-tabs-mode: nil; tab-width: 4 -*- */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <glib.h>
#include <gio/gio.h>
#include <gio/gunixsocketaddress.h>
#include "x-server.h"
#define MAXIMUM_REQUEST_LENGTH 65535
enum {
X_SERVER_CLIENT_CONNECTED,
X_SERVER_CLIENT_DISCONNECTED,
X_SERVER_RESET,
X_SERVER_LAST_SIGNAL
};
static guint x_server_signals[X_SERVER_LAST_SIGNAL] = { 0 };
typedef struct
{
gint display_number;
gchar *socket_path;
GSocket *socket;
GIOChannel *channel;
GHashTable *clients;
} XServerPrivate;
G_DEFINE_TYPE_WITH_PRIVATE (XServer, x_server, G_TYPE_OBJECT)
typedef struct
{
XServer *server;
GSocket *socket;
GIOChannel *channel;
} XClientPrivate;
G_DEFINE_TYPE_WITH_PRIVATE (XClient, x_client, G_TYPE_OBJECT)
enum
{
X_CLIENT_DISCONNECTED,
X_CLIENT_LAST_SIGNAL
};
static guint x_client_signals[X_CLIENT_LAST_SIGNAL] = { 0 };
void
x_client_send_failed (XClient *client, const gchar *reason)
{
XClientPrivate *priv = x_client_get_instance_private (client);
g_autofree gchar *message = g_strdup_printf ("FAILED:%s", reason);
errno = 0;
if (send (g_io_channel_unix_get_fd (priv->channel), message, strlen (message), 0) != strlen (message))
g_printerr ("Failed to send FAILED: %s\n", strerror (errno));
}
void
x_client_send_success (XClient *client)
{
XClientPrivate *priv = x_client_get_instance_private (client);
g_autofree gchar *message = g_strdup ("SUCCESS");
errno = 0;
if (send (g_io_channel_unix_get_fd (priv->channel), message, strlen (message), 0) != strlen (message))
g_printerr ("Failed to send SUCCESS: %s\n", strerror (errno));
}
void
x_client_disconnect (XClient *client)
{
XClientPrivate *priv = x_client_get_instance_private (client);
g_io_channel_shutdown (priv->channel, TRUE, NULL);
}
static void
x_client_init (XClient *client)
{
}
static void
x_client_class_init (XClientClass *klass)
{
x_client_signals[X_CLIENT_DISCONNECTED] =
g_signal_new (X_CLIENT_SIGNAL_DISCONNECTED,
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (XClientClass, disconnected),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
}
XServer *
x_server_new (gint display_number)
{
XServer *server = g_object_new (x_server_get_type (), NULL);
XServerPrivate *priv = x_server_get_instance_private (server);
priv->display_number = display_number;
return server;
}
static gboolean
client_read_cb (GIOChannel *channel, GIOCondition condition, gpointer data)
{
XClient *client = data;
XClientPrivate *priv = x_client_get_instance_private (client);
g_autofree gchar *d = NULL;
gsize d_length;
if (g_io_channel_read_to_end (channel, &d, &d_length, NULL) == G_IO_STATUS_NORMAL && d_length == 0)
{
XServer *server = priv->server;
XServerPrivate *s_priv = x_server_get_instance_private (server);
g_signal_emit (client, x_client_signals[X_CLIENT_DISCONNECTED], 0);
g_signal_emit (server, x_server_signals[X_SERVER_CLIENT_DISCONNECTED], 0, client);
g_hash_table_remove (s_priv->clients, priv->channel);
if (g_hash_table_size (s_priv->clients) == 0)
g_signal_emit (server, x_server_signals[X_SERVER_RESET], 0);
return G_SOURCE_REMOVE;
}
return G_SOURCE_CONTINUE;
}
static gboolean
socket_connect_cb (GIOChannel *channel, GIOCondition condition, gpointer data)
{
XServer *server = data;
XServerPrivate *priv = x_server_get_instance_private (server);
g_autoptr(GError) error = NULL;
g_autoptr(GSocket) data_socket = g_socket_accept (priv->socket, NULL, &error);
if (error)
g_warning ("Error accepting connection: %s", strerror (errno));
if (!data_socket)
return FALSE;
XClient *client = g_object_new (x_client_get_type (), NULL);
XClientPrivate *c_priv = x_client_get_instance_private (client);
c_priv->server = server;
c_priv->socket = g_steal_pointer (&data_socket);
c_priv->channel = g_io_channel_unix_new (g_socket_get_fd (c_priv->socket));
g_io_add_watch (c_priv->channel, G_IO_IN | G_IO_HUP, client_read_cb, client);
g_hash_table_insert (priv->clients, c_priv->channel, client);
g_signal_emit (server, x_server_signals[X_SERVER_CLIENT_CONNECTED], 0, client);
return TRUE;
}
gboolean
x_server_start (XServer *server)
{
XServerPrivate *priv = x_server_get_instance_private (server);
g_autofree gchar *name = g_strdup_printf (".x:%d", priv->display_number);
priv->socket_path = g_build_filename (g_getenv ("LIGHTDM_TEST_ROOT"), name, NULL);
g_autoptr(GError) error = NULL;
priv->socket = g_socket_new (G_SOCKET_FAMILY_UNIX, G_SOCKET_TYPE_STREAM, G_SOCKET_PROTOCOL_DEFAULT, &error);
if (!priv->socket ||
!g_socket_bind (priv->socket, g_unix_socket_address_new (priv->socket_path), TRUE, &error) ||
!g_socket_listen (priv->socket, &error))
{
g_warning ("Error creating Unix X socket: %s", error->message);
return FALSE;
}
priv->channel = g_io_channel_unix_new (g_socket_get_fd (priv->socket));
g_io_add_watch (priv->channel, G_IO_IN, socket_connect_cb, server);
return TRUE;
}
gsize
x_server_get_n_clients (XServer *server)
{
XServerPrivate *priv = x_server_get_instance_private (server);
return g_hash_table_size (priv->clients);
}
static void
x_server_init (XServer *server)
{
XServerPrivate *priv = x_server_get_instance_private (server);
priv->clients = g_hash_table_new_full (g_direct_hash, g_direct_equal, (GDestroyNotify) g_io_channel_unref, g_object_unref);
}
static void
x_server_finalize (GObject *object)
{
XServer *server = X_SERVER (object);
XServerPrivate *priv = x_server_get_instance_private (server);
if (priv->socket_path)
unlink (priv->socket_path);
G_OBJECT_CLASS (x_server_parent_class)->finalize (object);
}
static void
x_server_class_init (XServerClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = x_server_finalize;
x_server_signals[X_SERVER_CLIENT_CONNECTED] =
g_signal_new (X_SERVER_SIGNAL_CLIENT_CONNECTED,
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (XServerClass, client_connected),
NULL, NULL,
NULL,
G_TYPE_NONE, 1, x_client_get_type ());
x_server_signals[X_SERVER_CLIENT_DISCONNECTED] =
g_signal_new (X_SERVER_SIGNAL_CLIENT_DISCONNECTED,
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (XServerClass, client_disconnected),
NULL, NULL,
NULL,
G_TYPE_NONE, 1, x_client_get_type ());
x_server_signals[X_SERVER_RESET] =
g_signal_new (X_SERVER_SIGNAL_RESET,
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (XServerClass, reset),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
}
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