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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 | |
19 | struct 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 */ |
34 | static 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 */ |
42 | extern void br_become_root_bridge(struct net_bridge *br); |
43 | extern void br_config_bpdu_generation(struct net_bridge *); |
44 | extern void br_configuration_update(struct net_bridge *); |
45 | extern void br_port_state_selection(struct net_bridge *); |
46 | extern void br_received_config_bpdu(struct net_bridge_port *p, struct br_config_bpdu *bpdu); |
47 | extern void br_received_tcn_bpdu(struct net_bridge_port *p); |
48 | extern void br_transmit_config(struct net_bridge_port *p); |
49 | extern void br_transmit_tcn(struct net_bridge *br); |
50 | extern void br_topology_change_detection(struct net_bridge *br); |
51 | |
52 | /* br_stp_bpdu.c */ |
53 | extern void br_send_config_bpdu(struct net_bridge_port *, struct br_config_bpdu *); |
54 | extern void br_send_tcn_bpdu(struct net_bridge_port *); |
55 | |
56 | #endif |
57 |
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