[glib] Implement GProxyConnection a GIOStream+GTcpConn wrapper

[Nicolas Dufresne <nicolasd src gnome org>]

commit ee3dbf747e48a41c916674f111906f57996fd626
Author: Nicolas Dufresne <nicolas dufresne collabora co uk>
Date:   Thu Jul 22 20:51:23 2010 -0400

    Implement GProxyConnection a GIOStream+GTcpConn wrapper
    
    This class inherit from GTcpConnection by refing the socket of
    an existing GTcpConnection and wraps a custom GIOStream into itself. This
    is to allow implementing proxies that alters data stream, like when using
    GSSAPI privacy inside SOCKS5.

 gio/Makefile.am        |    2 +
 gio/gproxyconnection.c |  155 ++++++++++++++++++++++++++++++++++++++++++++++++
 gio/gproxyconnection.h |   69 +++++++++++++++++++++
 3 files changed, 226 insertions(+), 0 deletions(-)
---
diff --git a/gio/Makefile.am b/gio/Makefile.am
index 20d10c4..61f10eb 100644
--- a/gio/Makefile.am
+++ b/gio/Makefile.am
@@ -355,6 +355,8 @@ libgio_2_0_la_SOURCES =		\
 	gproxy.c		\
 	gproxyaddress.c         \
 	gproxyaddressenumerator.c \
+	gproxyconnection.c      \
+	gproxyconnection.h      \
 	gsocketservice.c	\
 	gsrvtarget.c		\
 	gtcpconnection.c	\
diff --git a/gio/gproxyconnection.c b/gio/gproxyconnection.c
new file mode 100644
index 0000000..2e909af
--- /dev/null
+++ b/gio/gproxyconnection.c
@@ -0,0 +1,155 @@
+/* GIO - GLib Input, Output and Streaming Library
+ *
+ * Copyright © 2010 Collabora Ltd.
+ *
+ * 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.
+ *
+ * Authors: Nicolas Dufresne <nicolas dufresne colllabora co uk>
+ */
+
+#include "config.h"
+
+#include "gproxyconnection.h"
+
+#include "gtcpconnection.h"
+#include "glibintl.h"
+
+#define g_proxy_connection_get_type _g_proxy_connection_get_type
+G_DEFINE_TYPE (GProxyConnection,
+	       g_proxy_connection, G_TYPE_TCP_CONNECTION);
+
+enum
+{
+  PROP_NONE,
+  PROP_IO_STREAM
+};
+
+struct _GProxyConnectionPrivate
+{
+  GIOStream *io_stream;
+};
+
+static GInputStream *
+g_proxy_connection_get_input_stream (GIOStream *io_stream)
+{
+  GProxyConnection *connection;
+  connection = G_PROXY_PROXY_CONNECTION (io_stream);
+  return g_io_stream_get_input_stream (connection->priv->io_stream);
+}
+
+static GOutputStream *
+g_proxy_connection_get_output_stream (GIOStream *io_stream)
+{
+  GProxyConnection *connection;
+  connection = G_PROXY_PROXY_CONNECTION (io_stream);
+  return g_io_stream_get_output_stream (connection->priv->io_stream);
+}
+
+static void
+g_proxy_connection_get_property (GObject    *object,
+                                 guint       prop_id,
+                                 GValue     *value,
+                                 GParamSpec *pspec)
+{
+  GProxyConnection *connection = G_PROXY_PROXY_CONNECTION (object);
+
+  switch (prop_id)
+    {
+     case PROP_IO_STREAM:
+      g_value_set_object (value, connection->priv->io_stream);
+      break;
+
+     default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+g_proxy_connection_set_property (GObject      *object,
+                                        guint         prop_id,
+                                        const GValue *value,
+                                        GParamSpec   *pspec)
+{
+  GProxyConnection *connection = G_PROXY_PROXY_CONNECTION (object);
+
+  switch (prop_id)
+    {
+     case PROP_IO_STREAM:
+      connection->priv->io_stream = G_IO_STREAM (g_value_dup_object (value));
+      break;
+
+     default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+g_proxy_connection_finalize (GObject *object)
+{
+  GProxyConnection *connection = G_PROXY_PROXY_CONNECTION (object);
+
+  g_object_unref (connection->priv->io_stream);
+
+  G_OBJECT_CLASS (g_proxy_connection_parent_class)->finalize (object);
+}
+
+static void
+g_proxy_connection_class_init (GProxyConnectionClass *klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+  GIOStreamClass *stream_class = G_IO_STREAM_CLASS (klass);
+
+  g_type_class_add_private (klass, sizeof (GProxyConnectionPrivate));
+
+  gobject_class->set_property = g_proxy_connection_set_property;
+  gobject_class->get_property = g_proxy_connection_get_property;
+  gobject_class->finalize = g_proxy_connection_finalize;
+
+  stream_class->get_input_stream = g_proxy_connection_get_input_stream;
+  stream_class->get_output_stream = g_proxy_connection_get_output_stream;
+
+  g_object_class_install_property (gobject_class,
+                                   PROP_IO_STREAM,
+                                   g_param_spec_object ("io-stream",
+			                                P_("IO Stream"),
+			                                P_("The altered streams"),
+                                                        G_TYPE_SOCKET_CONNECTION,
+                                                        G_PARAM_CONSTRUCT_ONLY |
+                                                        G_PARAM_READWRITE |
+                                                        G_PARAM_STATIC_STRINGS));
+}
+
+static void
+g_proxy_connection_init (GProxyConnection *connection)
+{
+  connection->priv = G_TYPE_INSTANCE_GET_PRIVATE (connection,
+                                                  G_TYPE_PROXY_CONNECTION,
+                                                  GProxyConnectionPrivate);
+}
+
+GSocketConnection *
+_g_proxy_connection_new (GTcpConnection *connection,
+                         GIOStream      *io_stream)
+{
+  GSocket *socket;
+
+  socket = g_socket_connection_get_socket (G_SOCKET_CONNECTION (connection));
+
+  return G_SOCKET_CONNECTION (g_object_new (G_TYPE_PROXY_CONNECTION,
+                                            "io-stream", io_stream,
+                                            "socket", socket,
+                                            NULL));
+}
diff --git a/gio/gproxyconnection.h b/gio/gproxyconnection.h
new file mode 100644
index 0000000..901a290
--- /dev/null
+++ b/gio/gproxyconnection.h
@@ -0,0 +1,69 @@
+/* GIO - GLib Input, Output and Streaming Library
+ * Copyright © 2010 Collabora Ltd.
+ *
+ * This program 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 licence 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.
+ *
+ * Authors: Nicolas Dufresne <nicolas dufresne collabora co uk>
+ *
+ */
+
+#if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
+#error "Only <gio/gio.h> can be included directly."
+#endif
+
+#ifndef __G_PROXY_PROXY_CONNECTION_H__
+#define __G_PROXY_PROXY_CONNECTION_H__
+
+#include <glib-object.h>
+#include <gio/gtcpconnection.h>
+
+G_BEGIN_DECLS
+
+#define G_TYPE_PROXY_CONNECTION                  (_g_proxy_connection_get_type ())
+#define G_PROXY_PROXY_CONNECTION(inst)           (G_TYPE_CHECK_INSTANCE_CAST ((inst),                     \
+                                                         G_TYPE_PROXY_CONNECTION, GProxyConnection))
+#define G_PROXY_PROXY_CONNECTION_CLASS(class)    (G_TYPE_CHECK_CLASS_CAST ((class),                       \
+                                                         G_TYPE_PROXY_CONNECTION, GProxyConnectionClass))
+#define G_IS_PROXY_CONNECTION(inst)              (G_TYPE_CHECK_INSTANCE_TYPE ((inst),                     \
+                                                         G_TYPE_PROXY_CONNECTION))
+#define G_IS_PROXY_CONNECTION_CLASS(class)       (G_TYPE_CHECK_CLASS_TYPE ((class),                       \
+                                                         G_TYPE_PROXY_CONNECTION))
+#define G_PROXY_PROXY_CONNECTION_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_CLASS ((inst),                      \
+                                                         G_TYPE_PROXY_CONNECTION, GProxyConnectionClass))
+
+typedef struct _GProxyConnection                   GProxyConnection;
+typedef struct _GProxyConnectionPrivate            GProxyConnectionPrivate;
+typedef struct _GProxyConnectionClass              GProxyConnectionClass;
+
+struct _GProxyConnectionClass
+{
+  GTcpConnectionClass parent_class;
+};
+
+struct _GProxyConnection
+{
+  GTcpConnection parent_instance;
+  GProxyConnectionPrivate *priv;
+};
+
+GType _g_proxy_connection_get_type (void) G_GNUC_CONST;
+
+GSocketConnection *_g_proxy_connection_new (GTcpConnection *connection,
+                                            GIOStream      *io_stream);
+
+G_END_DECLS
+
+#endif /* __G_PROXY_PROXY_CONNECTION_H__ */