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diff --git a/dbus/dbus-message-handler.c b/dbus/dbus-message-handler.c
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+/* -*- mode: C; c-file-style: "gnu" -*- */
+/* dbus-message-handler.c Sender/receiver of messages.
+ *
+ * Copyright (C) 2002  Red Hat Inc.
+ *
+ * Licensed under the Academic Free License version 1.2
+ * 
+ * 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include "dbus-internals.h"
+#include "dbus-message-handler.h"
+#include "dbus-list.h"
+#include "dbus-connection-internal.h"
+
+/**
+ * @defgroup DBusMessageHandlerInternals DBusMessageHandler implementation details
+ * @ingroup DBusInternals
+ * @brief DBusMessageHandler private implementation details.
+ *
+ * The guts of DBusMessageHandler and its methods.
+ *
+ * @{
+ */
+
+
+/**
+ * @brief Internals of DBusMessageHandler
+ * 
+ * Object that can send and receive messages.
+ */
+struct DBusMessageHandler
+{
+  int refcount;                                   /**< reference count */
+
+  DBusHandleMessageFunction function;             /**< handler function */
+  void                     *user_data;            /**< user data for function */
+  DBusFreeFunction          free_user_data;       /**< free the user data */
+
+  DBusList *connections;                          /**< connections we're registered with */
+};
+
+/**
+ * Add this connection to the list used by this message handler.
+ * When the message handler goes away, the connection
+ * will be notified.
+ *
+ * @param handler the message handler
+ * @param connection the connection
+ * @returns #FALSE if not enough memory
+ */
+dbus_bool_t
+_dbus_message_handler_add_connection (DBusMessageHandler *handler,
+                                      DBusConnection     *connection)
+{
+  /* This is a bit wasteful - we just put the connection in the list
+   * once per time it's added. :-/
+   */
+  if (!_dbus_list_prepend (&handler->connections, connection))
+    return FALSE;
+
+  return TRUE;
+}
+
+/**
+ * Reverses the effect of _dbus_message_handler_add_connection().
+ * @param handler the message handler
+ * @param connection the connection
+ */
+void
+_dbus_message_handler_remove_connection (DBusMessageHandler *handler,
+                                         DBusConnection     *connection)
+{
+  if (!_dbus_list_remove (&handler->connections, connection))
+    _dbus_warn ("Function _dbus_message_handler_remove_connection() called when the connection hadn't been added\n");
+}
+
+
+/**
+ * Handles the given message, by dispatching the handler function
+ * for this DBusMessageHandler, if any.
+ * 
+ * @param handler the handler
+ * @param connection the connection that received the message
+ * @param message the message
+ *
+ * @returns what to do with the message
+ */
+DBusHandlerResult
+_dbus_message_handler_handle_message (DBusMessageHandler        *handler,
+                                      DBusConnection            *connection,
+                                      DBusMessage               *message)
+{
+  /* This function doesn't ref handler/connection/message
+   * since that's done in dbus_connection_dispatch_message().
+   */
+  if (handler->function != NULL)
+    return (* handler->function) (handler, connection, message, handler->user_data);
+  else
+    return DBUS_HANDLER_RESULT_ALLOW_MORE_HANDLERS;
+}
+
+/** @} */
+
+/**
+ * @defgroup DBusMessageHandler DBusMessageHandler
+ * @ingroup  DBus
+ * @brief Message processor  
+ *
+ * A DBusMessageHandler is an object that can send and receive
+ * messages. Typically the handler is registered with one or
+ * more DBusConnection objects and processes some types of
+ * messages received from the connection.
+ *
+ * @{
+ */
+
+/**
+ * @typedef DBusMessageHandler
+ *
+ * Opaque data type representing a message handler.
+ */
+
+/**
+ * Creates a new message handler. The handler function
+ * may be #NULL for a no-op handler or a handler to
+ * be assigned a function later.
+ *
+ * @param function function to call to handle a message
+ * @param user_data data to pass to the function
+ * @param free_user_data function to call to free the user data
+ * @returns a new DBusMessageHandler or #NULL if no memory.
+ */
+DBusMessageHandler*
+dbus_message_handler_new (DBusHandleMessageFunction function,
+                          void                     *user_data,
+                          DBusFreeFunction          free_user_data)
+{
+  DBusMessageHandler *handler;
+
+  handler = dbus_new (DBusMessageHandler, 1);
+
+  if (handler == NULL)
+    return NULL;
+  
+  handler->refcount = 1;
+  handler->function = function;
+  handler->user_data = user_data;
+  handler->free_user_data = free_user_data;
+  handler->connections = NULL;
+
+  return handler;
+}
+
+/**
+ * Increments the reference count on a message handler.
+ *
+ * @param handler the handler
+ */
+void
+dbus_message_handler_ref (DBusMessageHandler *handler)
+{
+  _dbus_assert (handler != NULL);
+  
+  handler->refcount += 1;
+}
+
+/**
+ * Decrements the reference count on a message handler,
+ * freeing the handler if the count reaches 0.
+ *
+ * @param handler the handler
+ */
+void
+dbus_message_handler_unref (DBusMessageHandler *handler)
+{
+  _dbus_assert (handler != NULL);
+  _dbus_assert (handler->refcount > 0);
+
+  handler->refcount -= 1;
+  if (handler->refcount == 0)
+    {
+      DBusList *link;
+      
+      if (handler->free_user_data)
+        (* handler->free_user_data) (handler->user_data);
+       
+      link = _dbus_list_get_first_link (&handler->connections);
+       while (link != NULL)
+         {
+           DBusConnection *connection = link->data;
+
+           _dbus_connection_handler_destroyed (connection, handler);
+           
+           link = _dbus_list_get_next_link (&handler->connections, link);
+         }
+
+       _dbus_list_clear (&handler->connections);
+
+       dbus_free (handler);
+    }
+}
+
+/**
+ * Gets the user data for the handler (the same user data
+ * passed to the handler function.)
+ *
+ * @param handler the handler
+ * @returns the user data
+ */
+void*
+dbus_message_handler_get_data (DBusMessageHandler *handler)
+{
+  return handler->user_data;
+}
+
+/**
+ * Sets the user data for the handler (the same user data
+ * to be passed to the handler function). Frees any previously-existing
+ * user data with the previous free_user_data function.
+ *
+ * @param handler the handler
+ * @param user_data the user data
+ * @param free_user_data free function for the data
+ */
+void
+dbus_message_handler_set_data (DBusMessageHandler *handler,
+                               void               *user_data,
+                               DBusFreeFunction    free_user_data)
+{
+  if (handler->free_user_data)
+    (* handler->free_user_data) (handler->user_data);
+
+  handler->user_data = user_data;
+  handler->free_user_data = free_user_data;
+}
+
+/**
+ * Sets the handler function. Call dbus_message_handler_set_data()
+ * to set the user data for the function.
+ *
+ * @param handler the handler
+ * @param function the function
+ */
+void
+dbus_message_handler_set_function (DBusMessageHandler        *handler,
+                                   DBusHandleMessageFunction  function)
+{
+  handler->function = function;
+}
+
+/** @} */