projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * Linux ethernet bridge | |
| 3 | * | |
| 4 | * Authors: | |
| 5 | * Lennert Buytenhek <[email protected]> | |
| 6 | * | |
| 1da177e4 LT |
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 | ||
| 14f98f25 | 19 | /* IEEE 802.1D-1998 timer values */ |
| 20 | #define BR_MIN_HELLO_TIME (1*HZ) | |
| 21 | #define BR_MAX_HELLO_TIME (10*HZ) | |
| 22 | ||
| 23 | #define BR_MIN_FORWARD_DELAY (2*HZ) | |
| 24 | #define BR_MAX_FORWARD_DELAY (30*HZ) | |
| 25 | ||
| 26 | #define BR_MIN_MAX_AGE (6*HZ) | |
| 27 | #define BR_MAX_MAX_AGE (40*HZ) | |
| 28 | ||
| 29 | #define BR_MIN_PATH_COST 1 | |
| 30 | #define BR_MAX_PATH_COST 65535 | |
| 31 | ||
| 1da177e4 LT |
32 | struct br_config_bpdu |
| 33 | { | |
| 34 | unsigned topology_change:1; | |
| 35 | unsigned topology_change_ack:1; | |
| 36 | bridge_id root; | |
| 37 | int root_path_cost; | |
| 38 | bridge_id bridge_id; | |
| 39 | port_id port_id; | |
| 40 | int message_age; | |
| 41 | int max_age; | |
| 42 | int hello_time; | |
| 43 | int forward_delay; | |
| 44 | }; | |
| 45 | ||
| 46 | /* called under bridge lock */ | |
| 47 | static inline int br_is_designated_port(const struct net_bridge_port *p) | |
| 48 | { | |
| 49 | return !memcmp(&p->designated_bridge, &p->br->bridge_id, 8) && | |
| 50 | (p->designated_port == p->port_id); | |
| 51 | } | |
| 52 | ||
| 53 | ||
| 54 | /* br_stp.c */ | |
| 55 | extern void br_become_root_bridge(struct net_bridge *br); | |
| 56 | extern void br_config_bpdu_generation(struct net_bridge *); | |
| 57 | extern void br_configuration_update(struct net_bridge *); | |
| 58 | extern void br_port_state_selection(struct net_bridge *); | |
| 59 | extern void br_received_config_bpdu(struct net_bridge_port *p, struct br_config_bpdu *bpdu); | |
| 60 | extern void br_received_tcn_bpdu(struct net_bridge_port *p); | |
| 61 | extern void br_transmit_config(struct net_bridge_port *p); | |
| 62 | extern void br_transmit_tcn(struct net_bridge *br); | |
| 63 | extern void br_topology_change_detection(struct net_bridge *br); | |
| 64 | ||
| 65 | /* br_stp_bpdu.c */ | |
| 66 | extern void br_send_config_bpdu(struct net_bridge_port *, struct br_config_bpdu *); | |
| 67 | extern void br_send_tcn_bpdu(struct net_bridge_port *); | |
| 68 | ||
| 69 | #endif |