/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *      Linux ethernet bridge
 *
 *      Authors:
 *      Lennert Buytenhek               <buytenh@gnu.org>
 */
#ifndef _LINUX_IF_BRIDGE_H
#define _LINUX_IF_BRIDGE_H


#include <linux/netdevice.h>
#include <uapi/linux/if_bridge.h>
#include <linux/bitops.h>

struct br_ip {
        union {
                __be32  ip4;
#if IS_ENABLED(CONFIG_IPV6)
                struct in6_addr ip6;
#endif
        } src;
        union {
                __be32  ip4;
#if IS_ENABLED(CONFIG_IPV6)
                struct in6_addr ip6;
#endif
                unsigned char   mac_addr[ETH_ALEN];
        } dst;
        __be16          proto;
        __u16           vid;
};

struct br_ip_list {
        struct list_head list;
        struct br_ip addr;
};

#define BR_HAIRPIN_MODE         BIT(0)
#define BR_BPDU_GUARD           BIT(1)
#define BR_ROOT_BLOCK           BIT(2)
#define BR_MULTICAST_FAST_LEAVE BIT(3)
#define BR_ADMIN_COST           BIT(4)
#define BR_LEARNING             BIT(5)
#define BR_FLOOD                BIT(6)
#define BR_AUTO_MASK            (BR_FLOOD | BR_LEARNING)
#define BR_PROMISC              BIT(7)
#define BR_PROXYARP             BIT(8)
#define BR_LEARNING_SYNC        BIT(9)
#define BR_PROXYARP_WIFI        BIT(10)
#define BR_MCAST_FLOOD          BIT(11)
#define BR_MULTICAST_TO_UNICAST BIT(12)
#define BR_VLAN_TUNNEL          BIT(13)
#define BR_BCAST_FLOOD          BIT(14)
#define BR_NEIGH_SUPPRESS       BIT(15)
#define BR_ISOLATED             BIT(16)
#define BR_MRP_AWARE            BIT(17)
#define BR_MRP_LOST_CONT        BIT(18)
#define BR_MRP_LOST_IN_CONT     BIT(19)
#define BR_TX_FWD_OFFLOAD       BIT(20)
#define BR_PORT_LOCKED          BIT(21)
#define BR_PORT_MAB             BIT(22)
#define BR_NEIGH_VLAN_SUPPRESS  BIT(23)

#define BR_DEFAULT_AGEING_TIME  (300 * HZ)

struct net_bridge;
void brioctl_set(int (*hook)(struct net *net, unsigned int cmd,
                             void __user *uarg));
int br_ioctl_call(struct net *net, unsigned int cmd, void __user *uarg);

#if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING)
int br_multicast_list_adjacent(struct net_device *dev,
                               struct list_head *br_ip_list);
bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto);
bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto);
bool br_multicast_has_router_adjacent(struct net_device *dev, int proto);
bool br_multicast_enabled(const struct net_device *dev);
bool br_multicast_router(const struct net_device *dev);
#else
static inline int br_multicast_list_adjacent(struct net_device *dev,
                                             struct list_head *br_ip_list)
{
        return 0;
}
static inline bool br_multicast_has_querier_anywhere(struct net_device *dev,
                                                     int proto)
{
        return false;
}
static inline bool br_multicast_has_querier_adjacent(struct net_device *dev,
                                                     int proto)
{
        return false;
}

static inline bool br_multicast_has_router_adjacent(struct net_device *dev,
                                                    int proto)
{
        return true;
}

static inline bool br_multicast_enabled(const struct net_device *dev)
{
        return false;
}
static inline bool br_multicast_router(const struct net_device *dev)
{
        return false;
}
#endif

#if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_VLAN_FILTERING)
bool br_vlan_enabled(const struct net_device *dev);
int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid);
int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid);
int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto);
int br_vlan_get_info(const struct net_device *dev, u16 vid,
                     struct bridge_vlan_info *p_vinfo);
int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid,
                         struct bridge_vlan_info *p_vinfo);
bool br_mst_enabled(const struct net_device *dev);
int br_mst_get_info(const struct net_device *dev, u16 msti, unsigned long *vids);
int br_mst_get_state(const struct net_device *dev, u16 msti, u8 *state);
#else
static inline bool br_vlan_enabled(const struct net_device *dev)
{
        return false;
}

static inline int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
{
        return -EINVAL;
}

static inline int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto)
{
        return -EINVAL;
}

static inline int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid)
{
        return -EINVAL;
}

static inline int br_vlan_get_info(const struct net_device *dev, u16 vid,
                                   struct bridge_vlan_info *p_vinfo)
{
        return -EINVAL;
}

static inline int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid,
                                       struct bridge_vlan_info *p_vinfo)
{
        return -EINVAL;
}

static inline bool br_mst_enabled(const struct net_device *dev)
{
        return false;
}

static inline int br_mst_get_info(const struct net_device *dev, u16 msti,
                                  unsigned long *vids)
{
        return -EINVAL;
}
static inline int br_mst_get_state(const struct net_device *dev, u16 msti,
                                   u8 *state)
{
        return -EINVAL;
}
#endif

#if IS_ENABLED(CONFIG_BRIDGE)
struct net_device *br_fdb_find_port(const struct net_device *br_dev,
                                    const unsigned char *addr,
                                    __u16 vid);
void br_fdb_clear_offload(const struct net_device *dev, u16 vid);
bool br_port_flag_is_set(const struct net_device *dev, unsigned long flag);
u8 br_port_get_stp_state(const struct net_device *dev);
clock_t br_get_ageing_time(const struct net_device *br_dev);
#else
static inline struct net_device *
br_fdb_find_port(const struct net_device *br_dev,
                 const unsigned char *addr,
                 __u16 vid)
{
        return NULL;
}

static inline void br_fdb_clear_offload(const struct net_device *dev, u16 vid)
{
}

static inline bool
br_port_flag_is_set(const struct net_device *dev, unsigned long flag)
{
        return false;
}

static inline u8 br_port_get_stp_state(const struct net_device *dev)
{
        return BR_STATE_DISABLED;
}

static inline clock_t br_get_ageing_time(const struct net_device *br_dev)
{
        return 0;
}
#endif

#endif