1 /*
2 * Linux ethernet bridge
3 *
4 * Authors:
5 * Lennert Buytenhek <buytenh@gnu.org>
6 *
7 * $Id: br_private_stp.h,v 1.2 2000/10/30 22:03:20 davem 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
21 struct 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 */
36 void br_become_root_bridge(struct net_bridge *br);
37 void br_config_bpdu_generation(struct net_bridge *);
38 void br_configuration_update(struct net_bridge *);
39 int br_is_designated_port(struct net_bridge_port *p);
40 int br_is_root_bridge(struct net_bridge *br);
41 void br_port_state_selection(struct net_bridge *);
42 void br_received_config_bpdu(struct net_bridge_port *p, struct br_config_bpdu *bpdu);
43 void br_received_tcn_bpdu(struct net_bridge_port *p);
44 void br_tick(unsigned long __data);
45 void br_transmit_config(struct net_bridge_port *p);
46 void br_transmit_tcn(struct net_bridge *br);
47 void br_topology_change_detection(struct net_bridge *br);
48
49 /* br_stp_bpdu.c */
50 void br_send_config_bpdu(struct net_bridge_port *, struct br_config_bpdu *);
51 void br_send_tcn_bpdu(struct net_bridge_port *);
52
53 #endif
54
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