2 * Linux ethernet bridge
5 * Lennert Buytenhek <buytenh@gnu.org>
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.
16 #include <linux/netdevice.h>
17 #include <linux/if_bridge.h>
18 #include <net/route.h>
20 #define BR_HASH_BITS 8
21 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
23 #define BR_HOLD_TIME (1*HZ)
25 #define BR_PORT_BITS 10
26 #define BR_MAX_PORTS (1<<BR_PORT_BITS)
28 #define BR_VERSION "2.3"
30 /* Path to usermode spanning tree program */
31 #define BR_STP_PROG "/sbin/bridge-stp"
33 typedef struct bridge_id bridge_id;
34 typedef struct mac_addr mac_addr;
35 typedef __u16 port_id;
39 unsigned char prio[2];
40 unsigned char addr[6];
45 unsigned char addr[6];
48 struct net_bridge_fdb_entry
50 struct hlist_node hlist;
51 struct net_bridge_port *dst;
54 unsigned long ageing_timer;
56 unsigned char is_local;
57 unsigned char is_static;
60 struct net_bridge_port_group {
61 struct net_bridge_port *port;
62 struct net_bridge_port_group *next;
63 struct hlist_node mglist;
65 struct timer_list timer;
66 struct timer_list query_timer;
71 struct net_bridge_mdb_entry
73 struct hlist_node hlist[2];
74 struct hlist_node mglist;
75 struct net_bridge *br;
76 struct net_bridge_port_group *ports;
78 struct timer_list timer;
79 struct timer_list query_timer;
84 struct net_bridge_mdb_htable
86 struct hlist_head *mhash;
88 struct net_bridge_mdb_htable *old;
95 struct net_bridge_port
97 struct net_bridge *br;
98 struct net_device *dev;
99 struct list_head list;
105 unsigned char topology_change_ack;
106 unsigned char config_pending;
108 port_id designated_port;
109 bridge_id designated_root;
110 bridge_id designated_bridge;
114 struct timer_list forward_delay_timer;
115 struct timer_list hold_timer;
116 struct timer_list message_age_timer;
121 #define BR_HAIRPIN_MODE 0x00000001
123 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
124 u32 multicast_startup_queries_sent;
125 unsigned char multicast_router;
126 struct timer_list multicast_router_timer;
127 struct timer_list multicast_query_timer;
128 struct hlist_head mglist;
129 struct hlist_node rlist;
136 struct list_head port_list;
137 struct net_device *dev;
138 spinlock_t hash_lock;
139 struct hlist_head hash[BR_HASH_SIZE];
140 unsigned long feature_mask;
141 #ifdef CONFIG_BRIDGE_NETFILTER
142 struct rtable fake_rtable;
145 #define BR_SET_MAC_ADDR 0x00000001
148 bridge_id designated_root;
151 unsigned long max_age;
152 unsigned long hello_time;
153 unsigned long forward_delay;
154 unsigned long bridge_max_age;
155 unsigned long ageing_time;
156 unsigned long bridge_hello_time;
157 unsigned long bridge_forward_delay;
159 u8 group_addr[ETH_ALEN];
163 BR_NO_STP, /* no spanning tree */
164 BR_KERNEL_STP, /* old STP in kernel */
165 BR_USER_STP, /* new RSTP in userspace */
168 unsigned char topology_change;
169 unsigned char topology_change_detected;
171 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
172 unsigned char multicast_router;
174 u8 multicast_disabled:1;
179 u32 multicast_last_member_count;
180 u32 multicast_startup_queries_sent;
181 u32 multicast_startup_query_count;
183 unsigned long multicast_last_member_interval;
184 unsigned long multicast_membership_interval;
185 unsigned long multicast_querier_interval;
186 unsigned long multicast_query_interval;
187 unsigned long multicast_query_response_interval;
188 unsigned long multicast_startup_query_interval;
190 spinlock_t multicast_lock;
191 struct net_bridge_mdb_htable *mdb;
192 struct hlist_head router_list;
193 struct hlist_head mglist;
195 struct timer_list multicast_router_timer;
196 struct timer_list multicast_querier_timer;
197 struct timer_list multicast_query_timer;
200 struct timer_list hello_timer;
201 struct timer_list tcn_timer;
202 struct timer_list topology_change_timer;
203 struct timer_list gc_timer;
204 struct kobject *ifobj;
207 struct br_input_skb_cb {
208 struct net_device *brdev;
213 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
215 extern struct notifier_block br_device_notifier;
216 extern const u8 br_group_address[ETH_ALEN];
218 /* called under bridge lock */
219 static inline int br_is_root_bridge(const struct net_bridge *br)
221 return !memcmp(&br->bridge_id, &br->designated_root, 8);
225 extern void br_dev_setup(struct net_device *dev);
226 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
227 struct net_device *dev);
230 extern int br_fdb_init(void);
231 extern void br_fdb_fini(void);
232 extern void br_fdb_flush(struct net_bridge *br);
233 extern void br_fdb_changeaddr(struct net_bridge_port *p,
234 const unsigned char *newaddr);
235 extern void br_fdb_cleanup(unsigned long arg);
236 extern void br_fdb_delete_by_port(struct net_bridge *br,
237 const struct net_bridge_port *p, int do_all);
238 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
239 const unsigned char *addr);
240 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
241 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
242 unsigned long count, unsigned long off);
243 extern int br_fdb_insert(struct net_bridge *br,
244 struct net_bridge_port *source,
245 const unsigned char *addr);
246 extern void br_fdb_update(struct net_bridge *br,
247 struct net_bridge_port *source,
248 const unsigned char *addr);
251 extern void br_deliver(const struct net_bridge_port *to,
252 struct sk_buff *skb);
253 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
254 extern void br_forward(const struct net_bridge_port *to,
255 struct sk_buff *skb);
256 extern int br_forward_finish(struct sk_buff *skb);
257 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
258 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
259 struct sk_buff *skb2);
262 extern void br_port_carrier_check(struct net_bridge_port *p);
263 extern int br_add_bridge(struct net *net, const char *name);
264 extern int br_del_bridge(struct net *net, const char *name);
265 extern void br_net_exit(struct net *net);
266 extern int br_add_if(struct net_bridge *br,
267 struct net_device *dev);
268 extern int br_del_if(struct net_bridge *br,
269 struct net_device *dev);
270 extern int br_min_mtu(const struct net_bridge *br);
271 extern void br_features_recompute(struct net_bridge *br);
274 extern int br_handle_frame_finish(struct sk_buff *skb);
275 extern struct sk_buff *br_handle_frame(struct net_bridge_port *p,
276 struct sk_buff *skb);
279 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
280 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
283 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
284 extern int br_multicast_rcv(struct net_bridge *br,
285 struct net_bridge_port *port,
286 struct sk_buff *skb);
287 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
288 struct sk_buff *skb);
289 extern void br_multicast_add_port(struct net_bridge_port *port);
290 extern void br_multicast_del_port(struct net_bridge_port *port);
291 extern void br_multicast_enable_port(struct net_bridge_port *port);
292 extern void br_multicast_disable_port(struct net_bridge_port *port);
293 extern void br_multicast_init(struct net_bridge *br);
294 extern void br_multicast_open(struct net_bridge *br);
295 extern void br_multicast_stop(struct net_bridge *br);
296 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
297 struct sk_buff *skb);
298 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
299 struct sk_buff *skb, struct sk_buff *skb2);
300 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
301 extern int br_multicast_set_port_router(struct net_bridge_port *p,
303 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
304 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
306 static inline bool br_multicast_is_router(struct net_bridge *br)
308 return br->multicast_router == 2 ||
309 (br->multicast_router == 1 &&
310 timer_pending(&br->multicast_router_timer));
313 static inline int br_multicast_rcv(struct net_bridge *br,
314 struct net_bridge_port *port,
320 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
326 static inline void br_multicast_add_port(struct net_bridge_port *port)
330 static inline void br_multicast_del_port(struct net_bridge_port *port)
334 static inline void br_multicast_enable_port(struct net_bridge_port *port)
338 static inline void br_multicast_disable_port(struct net_bridge_port *port)
342 static inline void br_multicast_init(struct net_bridge *br)
346 static inline void br_multicast_open(struct net_bridge *br)
350 static inline void br_multicast_stop(struct net_bridge *br)
354 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
359 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
361 struct sk_buff *skb2)
364 static inline bool br_multicast_is_router(struct net_bridge *br)
371 #ifdef CONFIG_BRIDGE_NETFILTER
372 extern int br_netfilter_init(void);
373 extern void br_netfilter_fini(void);
374 extern void br_netfilter_rtable_init(struct net_bridge *);
376 #define br_netfilter_init() (0)
377 #define br_netfilter_fini() do { } while(0)
378 #define br_netfilter_rtable_init(x)
382 extern void br_log_state(const struct net_bridge_port *p);
383 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
385 extern void br_init_port(struct net_bridge_port *p);
386 extern void br_become_designated_port(struct net_bridge_port *p);
389 extern void br_stp_enable_bridge(struct net_bridge *br);
390 extern void br_stp_disable_bridge(struct net_bridge *br);
391 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
392 extern void br_stp_enable_port(struct net_bridge_port *p);
393 extern void br_stp_disable_port(struct net_bridge_port *p);
394 extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
395 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
396 extern void br_stp_set_bridge_priority(struct net_bridge *br,
398 extern void br_stp_set_port_priority(struct net_bridge_port *p,
400 extern void br_stp_set_path_cost(struct net_bridge_port *p,
402 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
406 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
407 struct net_device *dev);
410 extern void br_stp_timer_init(struct net_bridge *br);
411 extern void br_stp_port_timer_init(struct net_bridge_port *p);
412 extern unsigned long br_timer_value(const struct timer_list *timer);
415 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
416 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
420 extern int br_netlink_init(void);
421 extern void br_netlink_fini(void);
422 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
426 extern const struct sysfs_ops brport_sysfs_ops;
427 extern int br_sysfs_addif(struct net_bridge_port *p);
430 extern int br_sysfs_addbr(struct net_device *dev);
431 extern void br_sysfs_delbr(struct net_device *dev);
435 #define br_sysfs_addif(p) (0)
436 #define br_sysfs_addbr(dev) (0)
437 #define br_sysfs_delbr(dev) do { } while(0)
438 #endif /* CONFIG_SYSFS */