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3111beed0d
With this patch, (re)broadcasting on a specific interfaces is avoided:
* No neighbor: There is no need to broadcast on an interface if there
is no node behind it.
* Single neighbor is source: If there is just one neighbor on an
interface and if this neighbor is the one we actually got this
broadcast packet from, then we do not need to echo it back.
* Single neighbor is originator: If there is just one neighbor on
an interface and if this neighbor is the originator of this
broadcast packet, then we do not need to echo it back.
Goodies for BATMAN V:
("Upgrade your BATMAN IV network to V now to get these for free!")
Thanks to the split of OGMv1 into two packet types, OGMv2 and ELP
that is, we can now apply the same optimizations stated above to OGMv2
packets, too.
Furthermore, with BATMAN V, rebroadcasts can be reduced in certain
multi interface cases, too, where BATMAN IV cannot. This is thanks to
the removal of the "secondary interface originator" concept in BATMAN V.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
112 lines
3.4 KiB
C
112 lines
3.4 KiB
C
/* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors:
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*
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* Marek Lindner, 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_HARD_INTERFACE_H_
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#define _NET_BATMAN_ADV_HARD_INTERFACE_H_
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#include "main.h"
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#include <linux/compiler.h>
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#include <linux/kref.h>
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#include <linux/notifier.h>
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#include <linux/rcupdate.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 net;
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enum batadv_hard_if_state {
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BATADV_IF_NOT_IN_USE,
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BATADV_IF_TO_BE_REMOVED,
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BATADV_IF_INACTIVE,
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BATADV_IF_ACTIVE,
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BATADV_IF_TO_BE_ACTIVATED,
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BATADV_IF_I_WANT_YOU,
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};
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/**
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* enum batadv_hard_if_bcast - broadcast avoidance options
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* @BATADV_HARDIF_BCAST_OK: Do broadcast on according hard interface
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* @BATADV_HARDIF_BCAST_NORECIPIENT: Broadcast not needed, there is no recipient
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* @BATADV_HARDIF_BCAST_DUPFWD: There is just the neighbor we got it from
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* @BATADV_HARDIF_BCAST_DUPORIG: There is just the originator
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*/
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enum batadv_hard_if_bcast {
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BATADV_HARDIF_BCAST_OK = 0,
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BATADV_HARDIF_BCAST_NORECIPIENT,
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BATADV_HARDIF_BCAST_DUPFWD,
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BATADV_HARDIF_BCAST_DUPORIG,
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};
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/**
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* enum batadv_hard_if_cleanup - Cleanup modi for soft_iface after slave removal
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* @BATADV_IF_CLEANUP_KEEP: Don't automatically delete soft-interface
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* @BATADV_IF_CLEANUP_AUTO: Delete soft-interface after last slave was removed
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*/
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enum batadv_hard_if_cleanup {
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BATADV_IF_CLEANUP_KEEP,
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BATADV_IF_CLEANUP_AUTO,
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};
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extern struct notifier_block batadv_hard_if_notifier;
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bool batadv_is_wifi_netdev(struct net_device *net_device);
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bool batadv_is_wifi_iface(int ifindex);
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struct batadv_hard_iface*
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batadv_hardif_get_by_netdev(const struct net_device *net_dev);
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int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
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struct net *net, const char *iface_name);
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void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
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enum batadv_hard_if_cleanup autodel);
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void batadv_hardif_remove_interfaces(void);
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int batadv_hardif_min_mtu(struct net_device *soft_iface);
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void batadv_update_min_mtu(struct net_device *soft_iface);
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void batadv_hardif_release(struct kref *ref);
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int batadv_hardif_no_broadcast(struct batadv_hard_iface *if_outgoing,
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u8 *orig_addr, u8 *orig_neigh);
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/**
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* batadv_hardif_put - decrement the hard interface refcounter and possibly
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* release it
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* @hard_iface: the hard interface to free
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*/
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static inline void batadv_hardif_put(struct batadv_hard_iface *hard_iface)
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{
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kref_put(&hard_iface->refcount, batadv_hardif_release);
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}
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static inline struct batadv_hard_iface *
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batadv_primary_if_get_selected(struct batadv_priv *bat_priv)
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{
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struct batadv_hard_iface *hard_iface;
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rcu_read_lock();
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hard_iface = rcu_dereference(bat_priv->primary_if);
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if (!hard_iface)
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goto out;
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if (!kref_get_unless_zero(&hard_iface->refcount))
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hard_iface = NULL;
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out:
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rcu_read_unlock();
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return hard_iface;
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}
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#endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */
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