1/*
2 *	Linux ethernet bridge
3 *
4 *	Authors:
5 *	Lennert Buytenhek		<buytenh@gnu.org>
6 *
7 *	$Id: br_private_stp.h,v 1.1.1.1 2008/10/15 03:27:33 james26_jang Exp $
8 *
9 *	This program is free software; you can redistribute it and/or
10 *	modify it under the terms of the GNU General Public License
11 *	as published by the Free Software Foundation; either version
12 *	2 of the License, or (at your option) any later version.
13 */
14
15#ifndef _BR_PRIVATE_STP_H
16#define _BR_PRIVATE_STP_H
17
18#define BPDU_TYPE_CONFIG 0
19#define BPDU_TYPE_TCN 0x80
20
21struct br_config_bpdu
22{
23	unsigned	topology_change:1;
24	unsigned	topology_change_ack:1;
25	bridge_id	root;
26	int		root_path_cost;
27	bridge_id	bridge_id;
28	port_id		port_id;
29	int		message_age;
30	int		max_age;
31	int		hello_time;
32	int		forward_delay;
33};
34
35/* br_stp.c */
36extern void br_become_root_bridge(struct net_bridge *br);
37extern void br_config_bpdu_generation(struct net_bridge *);
38extern void br_configuration_update(struct net_bridge *);
39extern int  br_is_designated_port(struct net_bridge_port *p);
40extern int  br_is_root_bridge(struct net_bridge *br);
41extern void br_port_state_selection(struct net_bridge *);
42extern void br_received_config_bpdu(struct net_bridge_port *p, struct br_config_bpdu *bpdu);
43extern void br_received_tcn_bpdu(struct net_bridge_port *p);
44extern void br_tick(unsigned long __data);
45extern void br_transmit_config(struct net_bridge_port *p);
46extern void br_transmit_tcn(struct net_bridge *br);
47extern void br_topology_change_detection(struct net_bridge *br);
48
49/* br_stp_bpdu.c */
50extern void br_send_config_bpdu(struct net_bridge_port *, struct br_config_bpdu *);
51extern void br_send_tcn_bpdu(struct net_bridge_port *);
52
53#endif
54