Root/net/bridge/br_private_stp.h

1/*
2 * Linux ethernet bridge
3 *
4 * Authors:
5 * Lennert Buytenhek <buytenh@gnu.org>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12
13#ifndef _BR_PRIVATE_STP_H
14#define _BR_PRIVATE_STP_H
15
16#define BPDU_TYPE_CONFIG 0
17#define BPDU_TYPE_TCN 0x80
18
19struct br_config_bpdu
20{
21    unsigned topology_change:1;
22    unsigned topology_change_ack:1;
23    bridge_id root;
24    int root_path_cost;
25    bridge_id bridge_id;
26    port_id port_id;
27    int message_age;
28    int max_age;
29    int hello_time;
30    int forward_delay;
31};
32
33/* called under bridge lock */
34static inline int br_is_designated_port(const struct net_bridge_port *p)
35{
36    return !memcmp(&p->designated_bridge, &p->br->bridge_id, 8) &&
37        (p->designated_port == p->port_id);
38}
39
40
41/* br_stp.c */
42extern void br_become_root_bridge(struct net_bridge *br);
43extern void br_config_bpdu_generation(struct net_bridge *);
44extern void br_configuration_update(struct net_bridge *);
45extern void br_port_state_selection(struct net_bridge *);
46extern void br_received_config_bpdu(struct net_bridge_port *p, struct br_config_bpdu *bpdu);
47extern void br_received_tcn_bpdu(struct net_bridge_port *p);
48extern void br_transmit_config(struct net_bridge_port *p);
49extern void br_transmit_tcn(struct net_bridge *br);
50extern void br_topology_change_detection(struct net_bridge *br);
51
52/* br_stp_bpdu.c */
53extern void br_send_config_bpdu(struct net_bridge_port *, struct br_config_bpdu *);
54extern void br_send_tcn_bpdu(struct net_bridge_port *);
55
56#endif
57

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