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lmc: Read outside array bounds
[deliverable/linux.git] / net / bridge / br_private.h
CommitLineData
1da177e4
LT		 1/*
2 * Linux ethernet bridge
3 *
4 * Authors:
5 * Lennert Buytenhek <buytenh@gnu.org>
6 *
1da177e4
LT		 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_H
14#define _BR_PRIVATE_H
15
16#include <linux/netdevice.h>
1da177e4 17#include <linux/if_bridge.h>
4adf0af6 18#include <net/route.h>
1da177e4
LT		 19
20#define BR_HASH_BITS 8
21#define BR_HASH_SIZE (1 << BR_HASH_BITS)
22
23#define BR_HOLD_TIME (1*HZ)
24
25#define BR_PORT_BITS 10
26#define BR_MAX_PORTS (1<<BR_PORT_BITS)
27
9cde0708
SH		 28#define BR_VERSION "2.3"
29
30/* Path to usermode spanning tree program */
31#define BR_STP_PROG "/sbin/bridge-stp"
8cbb512e 32
1da177e4
LT		 33typedef struct bridge_id bridge_id;
34typedef struct mac_addr mac_addr;
35typedef __u16 port_id;
36
37struct bridge_id
38{
39 unsigned char prio[2];
40 unsigned char addr[6];
41};
42
43struct mac_addr
44{
45 unsigned char addr[6];
46};
47
48struct net_bridge_fdb_entry
49{
50 struct hlist_node hlist;
51 struct net_bridge_port *dst;
52
53 struct rcu_head rcu;
1da177e4
LT		 54 unsigned long ageing_timer;
55 mac_addr addr;
56 unsigned char is_local;
57 unsigned char is_static;
58};
59
60struct net_bridge_port
61{
62 struct net_bridge *br;
63 struct net_device *dev;
64 struct list_head list;
65
66 /* STP */
67 u8 priority;
68 u8 state;
69 u16 port_no;
70 unsigned char topology_change_ack;
71 unsigned char config_pending;
72 port_id port_id;
73 port_id designated_port;
74 bridge_id designated_root;
75 bridge_id designated_bridge;
76 u32 path_cost;
77 u32 designated_cost;
78
79 struct timer_list forward_delay_timer;
80 struct timer_list hold_timer;
81 struct timer_list message_age_timer;
82 struct kobject kobj;
83 struct rcu_head rcu;
84};
85
86struct net_bridge
87{
88 spinlock_t lock;
89 struct list_head port_list;
90 struct net_device *dev;
1da177e4
LT		 91 spinlock_t hash_lock;
92 struct hlist_head hash[BR_HASH_SIZE];
93 struct list_head age_list;
edb5e46f 94 unsigned long feature_mask;
4adf0af6
SW		 95#ifdef CONFIG_BRIDGE_NETFILTER
96 struct rtable fake_rtable;
97#endif
92c0574f
SH		 98 unsigned long flags;
99#define BR_SET_MAC_ADDR 0x00000001
1da177e4
LT		 100
101 /* STP */
102 bridge_id designated_root;
103 bridge_id bridge_id;
104 u32 root_path_cost;
105 unsigned long max_age;
106 unsigned long hello_time;
107 unsigned long forward_delay;
108 unsigned long bridge_max_age;
109 unsigned long ageing_time;
110 unsigned long bridge_hello_time;
111 unsigned long bridge_forward_delay;
112
fda93d92 113 u8 group_addr[ETH_ALEN];
1da177e4 114 u16 root_port;
9cde0708
SH		 115
116 enum {
117 BR_NO_STP, /* no spanning tree */
118 BR_KERNEL_STP, /* old STP in kernel */
119 BR_USER_STP, /* new RSTP in userspace */
120 } stp_enabled;
121
1da177e4
LT		 122 unsigned char topology_change;
123 unsigned char topology_change_detected;
124
125 struct timer_list hello_timer;
126 struct timer_list tcn_timer;
127 struct timer_list topology_change_timer;
128 struct timer_list gc_timer;
43b98c4a 129 struct kobject *ifobj;
1da177e4
LT		 130};
131
132extern struct notifier_block br_device_notifier;
fda93d92 133extern const u8 br_group_address[ETH_ALEN];
1da177e4
LT		 134
135/* called under bridge lock */
136static inline int br_is_root_bridge(const struct net_bridge *br)
137{
138 return !memcmp(&br->bridge_id, &br->designated_root, 8);
139}
140
1da177e4
LT		 141/* br_device.c */
142extern void br_dev_setup(struct net_device *dev);
143extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
144
145/* br_fdb.c */
87a596e0 146extern int br_fdb_init(void);
1da177e4 147extern void br_fdb_fini(void);
9cf63747 148extern void br_fdb_flush(struct net_bridge *br);
1da177e4
LT		 149extern void br_fdb_changeaddr(struct net_bridge_port *p,
150 const unsigned char *newaddr);
151extern void br_fdb_cleanup(unsigned long arg);
152extern void br_fdb_delete_by_port(struct net_bridge *br,
1a620698 153 const struct net_bridge_port *p, int do_all);
1da177e4
LT		 154extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
155 const unsigned char *addr);
da678292 156extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
9d6f229f 157extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
1da177e4
LT		 158 unsigned long count, unsigned long off);
159extern int br_fdb_insert(struct net_bridge *br,
160 struct net_bridge_port *source,
161 const unsigned char *addr);
162extern void br_fdb_update(struct net_bridge *br,
163 struct net_bridge_port *source,
164 const unsigned char *addr);
165
166/* br_forward.c */
167extern void br_deliver(const struct net_bridge_port *to,
168 struct sk_buff *skb);
169extern int br_dev_queue_push_xmit(struct sk_buff *skb);
170extern void br_forward(const struct net_bridge_port *to,
171 struct sk_buff *skb);
172extern int br_forward_finish(struct sk_buff *skb);
e081e1e3
HX		 173extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
174extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb);
1da177e4
LT		 175
176/* br_if.c */
269def7c 177extern void br_port_carrier_check(struct net_bridge_port *p);
4aa678ba
AD		 178extern int br_add_bridge(struct net *net, const char *name);
179extern int br_del_bridge(struct net *net, const char *name);
712d6954 180extern void br_net_exit(struct net *net);
1da177e4
LT		 181extern int br_add_if(struct net_bridge *br,
182 struct net_device *dev);
183extern int br_del_if(struct net_bridge *br,
184 struct net_device *dev);
185extern int br_min_mtu(const struct net_bridge *br);
81d35307 186extern void br_features_recompute(struct net_bridge *br);
1da177e4
LT		 187
188/* br_input.c */
189extern int br_handle_frame_finish(struct sk_buff *skb);
6229e362
SH		 190extern struct sk_buff *br_handle_frame(struct net_bridge_port *p,
191 struct sk_buff *skb);
1da177e4
LT		 192
193/* br_ioctl.c */
194extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
881d966b 195extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
1da177e4
LT		 196
197/* br_netfilter.c */
c0909713 198#ifdef CONFIG_BRIDGE_NETFILTER
1da177e4
LT		 199extern int br_netfilter_init(void);
200extern void br_netfilter_fini(void);
4adf0af6 201extern void br_netfilter_rtable_init(struct net_bridge *);
c0909713
SH		 202#else
203#define br_netfilter_init() (0)
204#define br_netfilter_fini() do { } while(0)
4adf0af6 205#define br_netfilter_rtable_init(x)
c0909713 206#endif
1da177e4
LT		 207
208/* br_stp.c */
209extern void br_log_state(const struct net_bridge_port *p);
210extern struct net_bridge_port *br_get_port(struct net_bridge *br,
9d6f229f 211 u16 port_no);
1da177e4
LT		 212extern void br_init_port(struct net_bridge_port *p);
213extern void br_become_designated_port(struct net_bridge_port *p);
214
215/* br_stp_if.c */
216extern void br_stp_enable_bridge(struct net_bridge *br);
217extern void br_stp_disable_bridge(struct net_bridge *br);
9cde0708 218extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1da177e4
LT		 219extern void br_stp_enable_port(struct net_bridge_port *p);
220extern void br_stp_disable_port(struct net_bridge_port *p);
221extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
4505a3ef 222extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1da177e4
LT		 223extern void br_stp_set_bridge_priority(struct net_bridge *br,
224 u16 newprio);
225extern void br_stp_set_port_priority(struct net_bridge_port *p,
226 u8 newprio);
227extern void br_stp_set_path_cost(struct net_bridge_port *p,
228 u32 path_cost);
229extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
230
231/* br_stp_bpdu.c */
7c85fbf0
PM		 232struct stp_proto;
233extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
234 struct net_device *dev);
1da177e4
LT		 235
236/* br_stp_timer.c */
237extern void br_stp_timer_init(struct net_bridge *br);
238extern void br_stp_port_timer_init(struct net_bridge_port *p);
239extern unsigned long br_timer_value(const struct timer_list *timer);
240
241/* br.c */
da678292
MM		 242#if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
243extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
244#endif
1da177e4 245
11dc1f36 246/* br_netlink.c */
32fe21c0 247extern int br_netlink_init(void);
11dc1f36
SH		 248extern void br_netlink_fini(void);
249extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
250
1da177e4
LT		 251#ifdef CONFIG_SYSFS
252/* br_sysfs_if.c */
bab1deea 253extern struct sysfs_ops brport_sysfs_ops;
1da177e4 254extern int br_sysfs_addif(struct net_bridge_port *p);
1da177e4
LT		 255
256/* br_sysfs_br.c */
257extern int br_sysfs_addbr(struct net_device *dev);
258extern void br_sysfs_delbr(struct net_device *dev);
259
260#else
261
262#define br_sysfs_addif(p) (0)
1da177e4
LT		 263#define br_sysfs_addbr(dev) (0)
264#define br_sysfs_delbr(dev) do { } while(0)
265#endif /* CONFIG_SYSFS */
266
267#endif
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