1 /*
2 * Linux ethernet bridge
3 *
4 * Authors:
5 * Lennert Buytenhek <buytenh@gnu.org>
6 *
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 #ifndef _LINUX_IF_BRIDGE_H
13 #define _LINUX_IF_BRIDGE_H
14
15
16 #include <linux/netdevice.h>
17 #include <uapi/linux/if_bridge.h>
18 #include <linux/bitops.h>
19
20 struct br_ip {
21 union {
22 __be32 ip4;
23 #if IS_ENABLED(CONFIG_IPV6)
24 struct in6_addr ip6;
25 #endif
26 } u;
27 __be16 proto;
28 __u16 vid;
29 };
30
31 struct br_ip_list {
32 struct list_head list;
33 struct br_ip addr;
34 };
35
36 #define BR_HAIRPIN_MODE BIT(0)
37 #define BR_BPDU_GUARD BIT(1)
38 #define BR_ROOT_BLOCK BIT(2)
39 #define BR_MULTICAST_FAST_LEAVE BIT(3)
40 #define BR_ADMIN_COST BIT(4)
41 #define BR_LEARNING BIT(5)
42 #define BR_FLOOD BIT(6)
43 #define BR_AUTO_MASK (BR_FLOOD | BR_LEARNING)
44 #define BR_PROMISC BIT(7)
45 #define BR_PROXYARP BIT(8)
46 #define BR_LEARNING_SYNC BIT(9)
47 #define BR_PROXYARP_WIFI BIT(10)
48 #define BR_MCAST_FLOOD BIT(11)
49 #define BR_MULTICAST_TO_UNICAST BIT(12)
50 #define BR_VLAN_TUNNEL BIT(13)
51 #define BR_BCAST_FLOOD BIT(14)
52 #define BR_NEIGH_SUPPRESS BIT(15)
53 #define BR_ISOLATED BIT(16)
54
55 #define BR_DEFAULT_AGEING_TIME (300 * HZ)
56
57 extern void brioctl_set(int (*ioctl_hook)(struct net *, unsigned int, void __user *));
58
59 typedef int br_should_route_hook_t(struct sk_buff *skb);
60 extern br_should_route_hook_t __rcu *br_should_route_hook;
61
62 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING)
63 int br_multicast_list_adjacent(struct net_device *dev,
64 struct list_head *br_ip_list);
65 bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto);
66 bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto);
67 bool br_multicast_enabled(const struct net_device *dev);
68 bool br_multicast_router(const struct net_device *dev);
69 #else
br_multicast_list_adjacent(struct net_device * dev,struct list_head * br_ip_list)70 static inline int br_multicast_list_adjacent(struct net_device *dev,
71 struct list_head *br_ip_list)
72 {
73 return 0;
74 }
br_multicast_has_querier_anywhere(struct net_device * dev,int proto)75 static inline bool br_multicast_has_querier_anywhere(struct net_device *dev,
76 int proto)
77 {
78 return false;
79 }
br_multicast_has_querier_adjacent(struct net_device * dev,int proto)80 static inline bool br_multicast_has_querier_adjacent(struct net_device *dev,
81 int proto)
82 {
83 return false;
84 }
br_multicast_enabled(const struct net_device * dev)85 static inline bool br_multicast_enabled(const struct net_device *dev)
86 {
87 return false;
88 }
br_multicast_router(const struct net_device * dev)89 static inline bool br_multicast_router(const struct net_device *dev)
90 {
91 return false;
92 }
93 #endif
94
95 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_VLAN_FILTERING)
96 bool br_vlan_enabled(const struct net_device *dev);
97 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid);
98 int br_vlan_get_info(const struct net_device *dev, u16 vid,
99 struct bridge_vlan_info *p_vinfo);
100 #else
br_vlan_enabled(const struct net_device * dev)101 static inline bool br_vlan_enabled(const struct net_device *dev)
102 {
103 return false;
104 }
105
br_vlan_get_pvid(const struct net_device * dev,u16 * p_pvid)106 static inline int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
107 {
108 return -EINVAL;
109 }
110
br_vlan_get_info(const struct net_device * dev,u16 vid,struct bridge_vlan_info * p_vinfo)111 static inline int br_vlan_get_info(const struct net_device *dev, u16 vid,
112 struct bridge_vlan_info *p_vinfo)
113 {
114 return -EINVAL;
115 }
116 #endif
117
118 #if IS_ENABLED(CONFIG_BRIDGE)
119 struct net_device *br_fdb_find_port(const struct net_device *br_dev,
120 const unsigned char *addr,
121 __u16 vid);
122 #else
123 static inline struct net_device *
br_fdb_find_port(const struct net_device * br_dev,const unsigned char * addr,__u16 vid)124 br_fdb_find_port(const struct net_device *br_dev,
125 const unsigned char *addr,
126 __u16 vid)
127 {
128 return NULL;
129 }
130 #endif
131
132 #endif
133