/* * Linux ethernet bridge * * Authors: * Lennert Buytenhek <buytenh@gnu.org> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _BR_PRIVATE_STP_H #define _BR_PRIVATE_STP_H #define BPDU_TYPE_CONFIG 0 #define BPDU_TYPE_TCN 0x80 struct br_config_bpdu { unsigned topology_change:1; unsigned topology_change_ack:1; bridge_id root; int root_path_cost; bridge_id bridge_id; port_id port_id; int message_age; int max_age; int hello_time; int forward_delay; }; /* called under bridge lock */ static inline int br_is_designated_port(const struct net_bridge_port *p) { return !memcmp(&p->designated_bridge, &p->br->bridge_id, 8) && (p->designated_port == p->port_id); } /* br_stp.c */ extern void br_become_root_bridge(struct net_bridge *br); extern void br_config_bpdu_generation(struct net_bridge *); extern void br_configuration_update(struct net_bridge *); extern void br_port_state_selection(struct net_bridge *); extern void br_received_config_bpdu(struct net_bridge_port *p, struct br_config_bpdu *bpdu); extern void br_received_tcn_bpdu(struct net_bridge_port *p); extern void br_transmit_config(struct net_bridge_port *p); extern void br_transmit_tcn(struct net_bridge *br); extern void br_topology_change_detection(struct net_bridge *br); /* br_stp_bpdu.c */ extern void br_send_config_bpdu(struct net_bridge_port *, struct br_config_bpdu *); extern void br_send_tcn_bpdu(struct net_bridge_port *); #endif