* Changed ETHER_GET_LINK_STATE ethernet driver interface, added ETHER_SET_LINK_STATE_SEM.

* The device interface list now uses class DoublyLinkedList instead of struct list.
* Implemented SIOC[SG]IFMEDIA for setting (not supported by any device yet), and
  retrieving the device media information.
* Fixed a locking bug in list_domain_interfaces().
* Added new stack function device_link_changed() that should be called in case the
  link state (media) changed.
* The ethernet device module now spawns a thread and will periodically check the media
  state of all ethernet devices that support this (if any).
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20546 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/net/net_stack.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2006, Haiku, Inc. All Rights Reserved.
+ * Copyright 2006-2007, Haiku, Inc. All Rights Reserved.
  * Distributed under the terms of the MIT License.
  */
 #ifndef NET_STACK_H
@@ -72,6 +72,7 @@ struct net_stack_module_info {
 	status_t (*unregister_device_monitor)(struct net_device *device,
 					net_receive_func receiveFunc, void *cookie);
 
+	status_t (*device_link_changed)(struct net_device *device);
 	status_t (*device_removed)(struct net_device *device);
 
 	// Utility Functions