| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame] | 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 | /* 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 | |
| 32 | struct br_config_bpdu { |
| 33 | unsigned int topology_change:1; |
| 34 | unsigned int topology_change_ack:1; |
| 35 | bridge_id root; |
| 36 | int root_path_cost; |
| 37 | bridge_id bridge_id; |
| 38 | port_id port_id; |
| 39 | int message_age; |
| 40 | int max_age; |
| 41 | int hello_time; |
| 42 | int forward_delay; |
| 43 | }; |
| 44 | |
| 45 | /* called under bridge lock */ |
| 46 | static inline int br_is_designated_port(const struct net_bridge_port *p) |
| 47 | { |
| 48 | return !memcmp(&p->designated_bridge, &p->br->bridge_id, 8) && |
| 49 | (p->designated_port == p->port_id); |
| 50 | } |
| 51 | |
| 52 | |
| 53 | /* br_stp.c */ |
| 54 | void br_become_root_bridge(struct net_bridge *br); |
| 55 | void br_config_bpdu_generation(struct net_bridge *); |
| 56 | void br_configuration_update(struct net_bridge *); |
| 57 | void br_port_state_selection(struct net_bridge *); |
| 58 | void br_received_config_bpdu(struct net_bridge_port *p, |
| 59 | const struct br_config_bpdu *bpdu); |
| 60 | void br_received_tcn_bpdu(struct net_bridge_port *p); |
| 61 | void br_transmit_config(struct net_bridge_port *p); |
| 62 | void br_transmit_tcn(struct net_bridge *br); |
| 63 | void br_topology_change_detection(struct net_bridge *br); |
| 64 | |
| 65 | /* br_stp_bpdu.c */ |
| 66 | void br_send_config_bpdu(struct net_bridge_port *, struct br_config_bpdu *); |
| 67 | void br_send_tcn_bpdu(struct net_bridge_port *); |
| 68 | |
| 69 | #endif |