00311de5fb
If dat is enabled it must be made sure that only the backbone gw which has claimed the remote destination for the ARP request answers the ARP request directly if the MAC address is known due to the local dat table. This prevents multiple ARP replies in a common backbone if more than one gateway already knows the remote mac searched for in the ARP request. Signed-off-by: Andreas Pape <apape@phoenixcontact.com> Acked-by: Simon Wunderlich <sw@simonwunderlich.de> [sven@narfation.org: fix conflicts with current version] Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
162 lines
4.4 KiB
C
162 lines
4.4 KiB
C
/* Copyright (C) 2011-2017 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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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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/stddef.h>
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#include <linux/types.h>
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struct net_device;
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struct netlink_callback;
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struct seq_file;
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struct sk_buff;
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/**
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* batadv_bla_is_loopdetect_mac - check if the mac address is from a loop detect
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* 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, bool is_bcast);
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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_table_seq_print_text(struct seq_file *seq, void *offset);
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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_table_seq_print_text(struct seq_file *seq,
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void *offset);
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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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int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
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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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bool is_bcast)
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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 int batadv_bla_claim_table_seq_print_text(struct seq_file *seq,
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void *offset)
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{
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return 0;
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}
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static inline int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
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void *offset)
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{
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return 0;
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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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