| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Linux ethernet bridge |
| 3 | * |
| 4 | * Authors: |
| 5 | * Lennert Buytenhek <buytenh@gnu.org> |
| 6 | * |
| 7 | * $Id: br_private_stp.h,v 1.3 2001/02/05 06:03:47 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 | /* called under bridge lock */ |
| 36 | static inline int br_is_designated_port(const struct net_bridge_port *p) |
| 37 | { |
| 38 | return !memcmp(&p->designated_bridge, &p->br->bridge_id, 8) && |
| 39 | (p->designated_port == p->port_id); |
| 40 | } |
| 41 | |
| 42 | |
| 43 | /* br_stp.c */ |
| 44 | extern void br_become_root_bridge(struct net_bridge *br); |
| 45 | extern void br_config_bpdu_generation(struct net_bridge *); |
| 46 | extern void br_configuration_update(struct net_bridge *); |
| 47 | extern void br_port_state_selection(struct net_bridge *); |
| 48 | extern void br_received_config_bpdu(struct net_bridge_port *p, struct br_config_bpdu *bpdu); |
| 49 | extern void br_received_tcn_bpdu(struct net_bridge_port *p); |
| 50 | extern void br_transmit_config(struct net_bridge_port *p); |
| 51 | extern void br_transmit_tcn(struct net_bridge *br); |
| 52 | extern void br_topology_change_detection(struct net_bridge *br); |
| 53 | |
| 54 | /* br_stp_bpdu.c */ |
| 55 | extern void br_send_config_bpdu(struct net_bridge_port *, struct br_config_bpdu *); |
| 56 | extern void br_send_tcn_bpdu(struct net_bridge_port *); |
| 57 | |
| 58 | #endif |