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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"
G_DEFINE_TYPE (XServer, x_server, G_TYPE_OBJECT);
G_DEFINE_TYPE (XClient, x_client, G_TYPE_OBJECT);
#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 };
struct XServerPrivate
{
gint display_number;
gchar *socket_path;
GSocket *socket;
GIOChannel *channel;
GHashTable *clients;
};
struct XClientPrivate
{
XServer *server;
GSocket *socket;
GIOChannel *channel;
};
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)
{
gchar *message;
message = g_strdup_printf ("FAILED:%s", reason);
errno = 0;
if (send (g_io_channel_unix_get_fd (client->priv->channel), message, strlen (message), 0) != strlen (message))
g_printerr ("Failed to send FAILED: %s\n", strerror (errno));
g_free (message);
}
void
x_client_send_success (XClient *client)
{
gchar *message;
message = g_strdup ("SUCCESS");
errno = 0;
if (send (g_io_channel_unix_get_fd (client->priv->channel), message, strlen (message), 0) != strlen (message))
g_printerr ("Failed to send SUCCESS: %s\n", strerror (errno));
g_free (message);
}
void
x_client_disconnect (XClient *client)
{
g_io_channel_shutdown (client->priv->channel, TRUE, NULL);
}
static void
x_client_init (XClient *client)
{
client->priv = G_TYPE_INSTANCE_GET_PRIVATE (client, x_client_get_type (), XClientPrivate);
}
static void
x_client_class_init (XClientClass *klass)
{
g_type_class_add_private (klass, sizeof (XClientPrivate));
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);
server->priv->display_number = display_number;
return server;
}
static gboolean
client_read_cb (GIOChannel *channel, GIOCondition condition, gpointer data)
{
XClient *client = data;
gchar *d;
gsize d_length;
if (g_io_channel_read_to_end (channel, &d, &d_length, NULL) == G_IO_STATUS_NORMAL && d_length == 0)
{
XServer *server = client->priv->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 (server->priv->clients, client->priv->channel);
if (g_hash_table_size (server->priv->clients) == 0)
g_signal_emit (server, x_server_signals[X_SERVER_RESET], 0);
g_free (d);
return G_SOURCE_REMOVE;
}
return G_SOURCE_CONTINUE;
}
static gboolean
socket_connect_cb (GIOChannel *channel, GIOCondition condition, gpointer data)
{
XServer *server = data;
GSocket *data_socket;
XClient *client;
GError *error = NULL;
data_socket = g_socket_accept (server->priv->socket, NULL, &error);
if (error)
g_warning ("Error accepting connection: %s", strerror (errno));
g_clear_error (&error);
if (!data_socket)
return FALSE;
client = g_object_new (x_client_get_type (), NULL);
client->priv->server = server;
client->priv->socket = data_socket;
client->priv->channel = g_io_channel_unix_new (g_socket_get_fd (data_socket));
g_io_add_watch (client->priv->channel, G_IO_IN | G_IO_HUP, client_read_cb, client);
g_hash_table_insert (server->priv->clients, client->priv->channel, client);
g_signal_emit (server, x_server_signals[X_SERVER_CLIENT_CONNECTED], 0, client);
return TRUE;
}
gboolean
x_server_start (XServer *server)
{
gchar *name;
GError *error = NULL;
name = g_strdup_printf (".x:%d", server->priv->display_number);
server->priv->socket_path = g_build_filename (g_getenv ("LIGHTDM_TEST_ROOT"), name, NULL);
g_free (name);
server->priv->socket = g_socket_new (G_SOCKET_FAMILY_UNIX, G_SOCKET_TYPE_STREAM, G_SOCKET_PROTOCOL_DEFAULT, &error);
if (!server->priv->socket ||
!g_socket_bind (server->priv->socket, g_unix_socket_address_new (server->priv->socket_path), TRUE, &error) ||
!g_socket_listen (server->priv->socket, &error))
{
g_warning ("Error creating Unix X socket: %s", error->message);
return FALSE;
}
server->priv->channel = g_io_channel_unix_new (g_socket_get_fd (server->priv->socket));
g_io_add_watch (server->priv->channel, G_IO_IN, socket_connect_cb, server);
return TRUE;
}
gsize
x_server_get_n_clients (XServer *server)
{
return g_hash_table_size (server->priv->clients);
}
static void
x_server_init (XServer *server)
{
server->priv = G_TYPE_INSTANCE_GET_PRIVATE (server, x_server_get_type (), XServerPrivate);
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 = (XServer *) object;
if (server->priv->socket_path)
unlink (server->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;
g_type_class_add_private (klass, sizeof (XServerPrivate));
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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