71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
|
/*
|
||
|
|
* 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
|
||
|
|
|
||
|
|
/* IEEE 802.1D-1998 timer values */
|
||
|
|
#define BR_MIN_HELLO_TIME (1*HZ)
|
||
|
|
#define BR_MAX_HELLO_TIME (10*HZ)
|
||
|
|
|
||
|
|
#define BR_MIN_FORWARD_DELAY (2*HZ)
|
||
|
|
#define BR_MAX_FORWARD_DELAY (30*HZ)
|
||
|
|
|
||
|
|
#define BR_MIN_MAX_AGE (6*HZ)
|
||
|
|
#define BR_MAX_MAX_AGE (40*HZ)
|
||
|
|
|
||
|
|
#define BR_MIN_PATH_COST 1
|
||
|
|
#define BR_MAX_PATH_COST 65535
|
||
|
|
|
||
|
|
struct br_config_bpdu {
|
||
|
|
unsigned int topology_change:1;
|
||
|
|
unsigned int 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 */
|
||
|
|
void br_become_root_bridge(struct net_bridge *br);
|
||
|
|
void br_config_bpdu_generation(struct net_bridge *);
|
||
|
|
void br_configuration_update(struct net_bridge *);
|
||
|
|
void br_port_state_selection(struct net_bridge *);
|
||
|
|
void br_received_config_bpdu(struct net_bridge_port *p,
|
||
|
|
const struct br_config_bpdu *bpdu);
|
||
|
|
void br_received_tcn_bpdu(struct net_bridge_port *p);
|
||
|
|
void br_transmit_config(struct net_bridge_port *p);
|
||
|
|
void br_transmit_tcn(struct net_bridge *br);
|
||
|
|
void br_topology_change_detection(struct net_bridge *br);
|
||
|
|
void __br_set_topology_change(struct net_bridge *br, unsigned char val);
|
||
|
|
|
||
|
|
/* br_stp_bpdu.c */
|
||
|
|
void br_send_config_bpdu(struct net_bridge_port *, struct br_config_bpdu *);
|
||
|
|
void br_send_tcn_bpdu(struct net_bridge_port *);
|
||
|
|
|
||
|
|
#endif
|