245 строки
6.9 KiB
C
245 строки
6.9 KiB
C
/*
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* Linux ethernet bridge
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*
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* Authors:
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* Lennert Buytenhek <buytenh@gnu.org>
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*
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* $Id: br_private.h,v 1.7 2001/12/24 00:59:55 davem Exp $
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _BR_PRIVATE_H
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#define _BR_PRIVATE_H
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#include <linux/netdevice.h>
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#include <linux/miscdevice.h>
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#include <linux/if_bridge.h>
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#define BR_HASH_BITS 8
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#define BR_HASH_SIZE (1 << BR_HASH_BITS)
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#define BR_HOLD_TIME (1*HZ)
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#define BR_PORT_BITS 10
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#define BR_MAX_PORTS (1<<BR_PORT_BITS)
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typedef struct bridge_id bridge_id;
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typedef struct mac_addr mac_addr;
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typedef __u16 port_id;
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struct bridge_id
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{
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unsigned char prio[2];
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unsigned char addr[6];
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};
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struct mac_addr
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{
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unsigned char addr[6];
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};
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struct net_bridge_fdb_entry
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{
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struct hlist_node hlist;
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struct net_bridge_port *dst;
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struct rcu_head rcu;
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atomic_t use_count;
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unsigned long ageing_timer;
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mac_addr addr;
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unsigned char is_local;
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unsigned char is_static;
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};
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struct net_bridge_port
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{
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struct net_bridge *br;
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struct net_device *dev;
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struct list_head list;
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/* STP */
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u8 priority;
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u8 state;
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u16 port_no;
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unsigned char topology_change_ack;
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unsigned char config_pending;
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port_id port_id;
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port_id designated_port;
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bridge_id designated_root;
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bridge_id designated_bridge;
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u32 path_cost;
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u32 designated_cost;
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struct timer_list forward_delay_timer;
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struct timer_list hold_timer;
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struct timer_list message_age_timer;
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struct kobject kobj;
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struct rcu_head rcu;
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};
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struct net_bridge
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{
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spinlock_t lock;
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struct list_head port_list;
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struct net_device *dev;
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struct net_device_stats statistics;
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spinlock_t hash_lock;
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struct hlist_head hash[BR_HASH_SIZE];
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struct list_head age_list;
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/* STP */
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bridge_id designated_root;
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bridge_id bridge_id;
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u32 root_path_cost;
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unsigned long max_age;
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unsigned long hello_time;
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unsigned long forward_delay;
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unsigned long bridge_max_age;
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unsigned long ageing_time;
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unsigned long bridge_hello_time;
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unsigned long bridge_forward_delay;
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u16 root_port;
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unsigned char stp_enabled;
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unsigned char topology_change;
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unsigned char topology_change_detected;
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struct timer_list hello_timer;
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struct timer_list tcn_timer;
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struct timer_list topology_change_timer;
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struct timer_list gc_timer;
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struct kobject ifobj;
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};
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extern struct notifier_block br_device_notifier;
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extern const unsigned char bridge_ula[6];
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/* called under bridge lock */
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static inline int br_is_root_bridge(const struct net_bridge *br)
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{
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return !memcmp(&br->bridge_id, &br->designated_root, 8);
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}
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/* br_device.c */
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extern void br_dev_setup(struct net_device *dev);
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extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
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/* br_fdb.c */
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extern void br_fdb_init(void);
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extern void br_fdb_fini(void);
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extern void br_fdb_changeaddr(struct net_bridge_port *p,
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const unsigned char *newaddr);
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extern void br_fdb_cleanup(unsigned long arg);
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extern void br_fdb_delete_by_port(struct net_bridge *br,
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struct net_bridge_port *p);
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extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
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const unsigned char *addr);
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extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br,
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unsigned char *addr);
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extern void br_fdb_put(struct net_bridge_fdb_entry *ent);
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extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
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unsigned long count, unsigned long off);
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extern int br_fdb_insert(struct net_bridge *br,
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struct net_bridge_port *source,
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const unsigned char *addr);
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extern void br_fdb_update(struct net_bridge *br,
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struct net_bridge_port *source,
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const unsigned char *addr);
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/* br_forward.c */
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extern void br_deliver(const struct net_bridge_port *to,
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struct sk_buff *skb);
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extern int br_dev_queue_push_xmit(struct sk_buff *skb);
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extern void br_forward(const struct net_bridge_port *to,
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struct sk_buff *skb);
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extern int br_forward_finish(struct sk_buff *skb);
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extern void br_flood_deliver(struct net_bridge *br,
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struct sk_buff *skb,
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int clone);
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extern void br_flood_forward(struct net_bridge *br,
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struct sk_buff *skb,
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int clone);
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/* br_if.c */
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extern int br_add_bridge(const char *name);
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extern int br_del_bridge(const char *name);
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extern void br_cleanup_bridges(void);
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extern int br_add_if(struct net_bridge *br,
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struct net_device *dev);
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extern int br_del_if(struct net_bridge *br,
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struct net_device *dev);
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extern int br_min_mtu(const struct net_bridge *br);
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/* br_input.c */
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extern int br_handle_frame_finish(struct sk_buff *skb);
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extern int br_handle_frame(struct net_bridge_port *p, struct sk_buff **pskb);
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/* br_ioctl.c */
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extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
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extern int br_ioctl_deviceless_stub(unsigned int cmd, void __user *arg);
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/* br_netfilter.c */
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extern int br_netfilter_init(void);
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extern void br_netfilter_fini(void);
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/* br_stp.c */
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extern void br_log_state(const struct net_bridge_port *p);
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extern struct net_bridge_port *br_get_port(struct net_bridge *br,
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u16 port_no);
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extern void br_init_port(struct net_bridge_port *p);
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extern void br_become_designated_port(struct net_bridge_port *p);
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/* br_stp_if.c */
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extern void br_stp_enable_bridge(struct net_bridge *br);
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extern void br_stp_disable_bridge(struct net_bridge *br);
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extern void br_stp_enable_port(struct net_bridge_port *p);
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extern void br_stp_disable_port(struct net_bridge_port *p);
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extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
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extern void br_stp_set_bridge_priority(struct net_bridge *br,
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u16 newprio);
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extern void br_stp_set_port_priority(struct net_bridge_port *p,
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u8 newprio);
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extern void br_stp_set_path_cost(struct net_bridge_port *p,
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u32 path_cost);
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extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
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/* br_stp_bpdu.c */
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extern int br_stp_handle_bpdu(struct sk_buff *skb);
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/* br_stp_timer.c */
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extern void br_stp_timer_init(struct net_bridge *br);
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extern void br_stp_port_timer_init(struct net_bridge_port *p);
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extern unsigned long br_timer_value(const struct timer_list *timer);
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/* br.c */
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extern struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br,
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unsigned char *addr);
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extern void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent);
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#ifdef CONFIG_SYSFS
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/* br_sysfs_if.c */
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extern int br_sysfs_addif(struct net_bridge_port *p);
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extern void br_sysfs_removeif(struct net_bridge_port *p);
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extern void br_sysfs_freeif(struct net_bridge_port *p);
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/* br_sysfs_br.c */
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extern int br_sysfs_addbr(struct net_device *dev);
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extern void br_sysfs_delbr(struct net_device *dev);
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#else
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#define br_sysfs_addif(p) (0)
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#define br_sysfs_removeif(p) do { } while(0)
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#define br_sysfs_freeif(p) kfree(p)
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#define br_sysfs_addbr(dev) (0)
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#define br_sysfs_delbr(dev) do { } while(0)
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#endif /* CONFIG_SYSFS */
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#endif
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