CoCalc -- bridge_loop

GitHub Repository: torvalds/linux
Path: blob/master/net/batman-adv/bridge_loop_avoidance.h
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/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (C) B.A.T.M.A.N. contributors:
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 *
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 * Simon Wunderlich
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 */
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#ifndef _NET_BATMAN_ADV_BLA_H_
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#define _NET_BATMAN_ADV_BLA_H_
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#include "main.h"
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#include <linux/compiler.h>
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#include <linux/netdevice.h>
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#include <linux/netlink.h>
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#include <linux/skbuff.h>
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#include <linux/stddef.h>
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#include <linux/types.h>
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/**
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 * batadv_bla_is_loopdetect_mac() - check if the mac address is from a loop
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 *  detect frame sent by bridge loop avoidance
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 * @mac: mac address to check
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 *
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 * Return: true if the it looks like a loop detect frame
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 * (mac starts with BA:BE), false otherwise
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 */
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static inline bool batadv_bla_is_loopdetect_mac(const uint8_t *mac)
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{
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	if (mac[0] == 0xba && mac[1] == 0xbe)
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		return true;
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	return false;
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}
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#ifdef CONFIG_BATMAN_ADV_BLA
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bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
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		   unsigned short vid, int packet_type);
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bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
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		   unsigned short vid);
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bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
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			       struct batadv_orig_node *orig_node,
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			       int hdr_size);
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int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
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int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb);
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bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig,
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				    unsigned short vid);
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bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
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				    struct sk_buff *skb);
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void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
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				    struct batadv_hard_iface *primary_if,
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				    struct batadv_hard_iface *oldif);
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void batadv_bla_status_update(struct net_device *net_dev);
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int batadv_bla_init(struct batadv_priv *bat_priv);
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void batadv_bla_free(struct batadv_priv *bat_priv);
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#ifdef CONFIG_BATMAN_ADV_DAT
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bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
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			    unsigned short vid);
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#endif
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#define BATADV_BLA_CRC_INIT	0
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#else /* ifdef CONFIG_BATMAN_ADV_BLA */
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static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
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				 struct sk_buff *skb, unsigned short vid,
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				 int packet_type)
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{
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	return false;
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}
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static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
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				 struct sk_buff *skb, unsigned short vid)
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{
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	return false;
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}
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static inline bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
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					     struct batadv_orig_node *orig_node,
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					     int hdr_size)
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{
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	return false;
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}
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static inline bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv,
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						  u8 *orig, unsigned short vid)
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{
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	return false;
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}
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static inline bool
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batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
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			       struct sk_buff *skb)
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{
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	return false;
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}
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static inline void
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batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
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			       struct batadv_hard_iface *primary_if,
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			       struct batadv_hard_iface *oldif)
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{
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}
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static inline int batadv_bla_init(struct batadv_priv *bat_priv)
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{
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	return 1;
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}
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static inline void batadv_bla_free(struct batadv_priv *bat_priv)
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{
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}
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static inline int batadv_bla_claim_dump(struct sk_buff *msg,
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					struct netlink_callback *cb)
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{
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	return -EOPNOTSUPP;
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}
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static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
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					   struct netlink_callback *cb)
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{
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	return -EOPNOTSUPP;
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}
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static inline
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bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
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			    unsigned short vid)
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{
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	return true;
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}
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#endif /* ifdef CONFIG_BATMAN_ADV_BLA */
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#endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */
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