summaryrefslogtreecommitdiffstats
path: root/kernel/linux2.5/net/bridge/br_private.h
blob: 124067e66e56bcd299e32cd2c5d04cd6d8a59095 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
/*
 *	Linux ethernet bridge
 *
 *	Authors:
 *	Lennert Buytenhek		<buytenh@gnu.org>
 *
 *	$Id: br_private.h,v 1.1 2002/08/23 20:04:31 bdschuym Exp $
 *
 *	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_H
#define _BR_PRIVATE_H

#include <linux/netdevice.h>
#include <linux/miscdevice.h>
#include <linux/if_bridge.h>
#include "br_private_timer.h"

#define BR_HASH_BITS 8
#define BR_HASH_SIZE (1 << BR_HASH_BITS)

#define BR_HOLD_TIME (1*HZ)

typedef struct bridge_id bridge_id;
typedef struct mac_addr mac_addr;
typedef __u16 port_id;

struct bridge_id
{
	unsigned char	prio[2];
	unsigned char	addr[6];
};

struct mac_addr
{
	unsigned char	addr[6];
	unsigned char	pad[2];
};

struct net_bridge_fdb_entry
{
	struct net_bridge_fdb_entry	*next_hash;
	struct net_bridge_fdb_entry	**pprev_hash;
	atomic_t			use_count;
	mac_addr			addr;
	struct net_bridge_port		*dst;
	unsigned long			ageing_timer;
	unsigned			is_local:1;
	unsigned			is_static:1;
};

struct net_bridge_port
{
	struct net_bridge_port		*next;
	struct net_bridge		*br;
	struct net_device		*dev;
	int				port_no;

	/* STP */
	port_id				port_id;
	int				state;
	int				path_cost;
	bridge_id			designated_root;
	int				designated_cost;
	bridge_id			designated_bridge;
	port_id				designated_port;
	unsigned			topology_change_ack:1;
	unsigned			config_pending:1;
	int				priority;

	struct br_timer			forward_delay_timer;
	struct br_timer			hold_timer;
	struct br_timer			message_age_timer;
};

struct net_bridge
{
	struct net_bridge		*next;
	rwlock_t			lock;
	struct net_bridge_port		*port_list;
	struct net_device		dev;
	struct net_device_stats		statistics;
	rwlock_t			hash_lock;
	struct net_bridge_fdb_entry	*hash[BR_HASH_SIZE];
	struct timer_list		tick;

	/* STP */
	bridge_id			designated_root;
	int				root_path_cost;
	int				root_port;
	int				max_age;
	int				hello_time;
	int				forward_delay;
	bridge_id			bridge_id;
	int				bridge_max_age;
	int				bridge_hello_time;
	int				bridge_forward_delay;
	unsigned			stp_enabled:1;
	unsigned			topology_change:1;
	unsigned			topology_change_detected:1;

	struct br_timer			hello_timer;
	struct br_timer			tcn_timer;
	struct br_timer			topology_change_timer;
	struct br_timer			gc_timer;

	int				ageing_time;
	int				gc_interval;
};

extern struct notifier_block br_device_notifier;
extern unsigned char bridge_ula[6];

/* br.c */
extern void br_dec_use_count(void);
extern void br_inc_use_count(void);

/* br_device.c */
extern void br_dev_setup(struct net_device *dev);
extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev);

/* br_fdb.c */
extern void br_fdb_changeaddr(struct net_bridge_port *p,
		       unsigned char *newaddr);
extern void br_fdb_cleanup(struct net_bridge *br);
extern void br_fdb_delete_by_port(struct net_bridge *br,
			   struct net_bridge_port *p);
extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br,
					unsigned char *addr);
extern void br_fdb_put(struct net_bridge_fdb_entry *ent);
extern int  br_fdb_get_entries(struct net_bridge *br,
			unsigned char *_buf,
			int maxnum,
			int offset);
extern void br_fdb_insert(struct net_bridge *br,
		   struct net_bridge_port *source,
		   unsigned char *addr,
		   int is_local);

/* br_forward.c */
extern void br_deliver(struct net_bridge_port *to,
		struct sk_buff *skb);
extern void br_forward(struct net_bridge_port *to,
		struct sk_buff *skb);
extern void br_flood_deliver(struct net_bridge *br,
		      struct sk_buff *skb,
		      int clone);
extern void br_flood_forward(struct net_bridge *br,
		      struct sk_buff *skb,
		      int clone);

/* br_if.c */
extern int br_add_bridge(char *name);
extern int br_del_bridge(char *name);
extern int br_add_if(struct net_bridge *br,
	      struct net_device *dev);
extern int br_del_if(struct net_bridge *br,
	      struct net_device *dev);
extern int br_get_bridge_ifindices(int *indices,
			    int num);
extern void br_get_port_ifindices(struct net_bridge *br,
			   int *ifindices);

/* br_input.c */
extern int br_handle_frame(struct sk_buff *skb);

/* br_ioctl.c */
extern void br_call_ioctl_atomic(void (*fn)(void));
extern int br_ioctl(struct net_bridge *br,
	     unsigned int cmd,
	     unsigned long arg0,
	     unsigned long arg1,
	     unsigned long arg2);
extern int br_ioctl_deviceless_stub(unsigned long arg);

/* br_stp.c */
extern int br_is_root_bridge(struct net_bridge *br);
extern struct net_bridge_port *br_get_port(struct net_bridge *br,
				    int port_no);
extern void br_init_port(struct net_bridge_port *p);
extern port_id br_make_port_id(struct net_bridge_port *p);
extern void br_become_designated_port(struct net_bridge_port *p);

/* br_stp_if.c */
extern void br_stp_enable_bridge(struct net_bridge *br);
extern void br_stp_disable_bridge(struct net_bridge *br);
extern void br_stp_enable_port(struct net_bridge_port *p);
extern void br_stp_disable_port(struct net_bridge_port *p);
extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
extern void br_stp_set_bridge_priority(struct net_bridge *br,
				int newprio);
extern void br_stp_set_port_priority(struct net_bridge_port *p,
			      int newprio);
extern void br_stp_set_path_cost(struct net_bridge_port *p,
			  int path_cost);

/* br_stp_bpdu.c */
extern void br_stp_handle_bpdu(struct sk_buff *skb);

#endif