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
20struct 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
31struct 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
57extern void brioctl_set(int (*ioctl_hook)(struct net *, unsigned int, void __user *));
58
59typedef int br_should_route_hook_t(struct sk_buff *skb);
60extern br_should_route_hook_t __rcu *br_should_route_hook;
61
62#if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING)
63int br_multicast_list_adjacent(struct net_device *dev,
64 struct list_head *br_ip_list);
65bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto);
66bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto);
67bool br_multicast_enabled(const struct net_device *dev);
68bool br_multicast_router(const struct net_device *dev);
69#else
70static inline int br_multicast_list_adjacent(struct net_device *dev,
71 struct list_head *br_ip_list)
72{
73 return 0;
74}
75static inline bool br_multicast_has_querier_anywhere(struct net_device *dev,
76 int proto)
77{
78 return false;
79}
80static inline bool br_multicast_has_querier_adjacent(struct net_device *dev,
81 int proto)
82{
83 return false;
84}
85static inline bool br_multicast_enabled(const struct net_device *dev)
86{
87 return false;
88}
89static 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)
96bool br_vlan_enabled(const struct net_device *dev);
97int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid);
98int br_vlan_get_info(const struct net_device *dev, u16 vid,
99 struct bridge_vlan_info *p_vinfo);
100#else
101static inline bool br_vlan_enabled(const struct net_device *dev)
102{
103 return false;
104}
105
106static inline int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
107{
108 return -EINVAL;
109}
110
111static 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)
119struct net_device *br_fdb_find_port(const struct net_device *br_dev,
120 const unsigned char *addr,
121 __u16 vid);
122void br_fdb_clear_offload(const struct net_device *dev, u16 vid);
123bool br_port_flag_is_set(const struct net_device *dev, unsigned long flag);
124#else
125static inline struct net_device *
126br_fdb_find_port(const struct net_device *br_dev,
127 const unsigned char *addr,
128 __u16 vid)
129{
130 return NULL;
131}
132
133static inline void br_fdb_clear_offload(const struct net_device *dev, u16 vid)
134{
135}
136
137static inline bool
138br_port_flag_is_set(const struct net_device *dev, unsigned long flag)
139{
140 return false;
141}
142#endif
143
144#endif
145