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953324776d
Two be able to network code two packets, one packet must be buffered until the next is available. This is done in a "coding buffer", which is essentially a hash table with lists of packets. Each entry in the hash table corresponds to a specific src-dst pair, which has a linked list of packets that are buffered. This patch adds skbs to the buffer just before forwarding them. The buffer is traversed every 10 ms, where timed skbs are removed from the buffer and transmitted. To allow experiments with the network coding scheme, the timeout is tunable through a file in debugfs. Signed-off-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
106 lines
3.0 KiB
C
106 lines
3.0 KiB
C
/* Copyright (C) 2012-2013 B.A.T.M.A.N. contributors:
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*
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* Martin Hundebøll, Jeppe Ledet-Pedersen
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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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*/
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#ifndef _NET_BATMAN_ADV_NETWORK_CODING_H_
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#define _NET_BATMAN_ADV_NETWORK_CODING_H_
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#ifdef CONFIG_BATMAN_ADV_NC
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int batadv_nc_init(struct batadv_priv *bat_priv);
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void batadv_nc_free(struct batadv_priv *bat_priv);
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void batadv_nc_update_nc_node(struct batadv_priv *bat_priv,
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struct batadv_orig_node *orig_node,
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struct batadv_orig_node *orig_neigh_node,
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struct batadv_ogm_packet *ogm_packet,
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int is_single_hop_neigh);
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void batadv_nc_purge_orig(struct batadv_priv *bat_priv,
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struct batadv_orig_node *orig_node,
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bool (*to_purge)(struct batadv_priv *,
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struct batadv_nc_node *));
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void batadv_nc_init_bat_priv(struct batadv_priv *bat_priv);
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void batadv_nc_init_orig(struct batadv_orig_node *orig_node);
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bool batadv_nc_skb_forward(struct sk_buff *skb,
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struct batadv_neigh_node *neigh_node,
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struct ethhdr *ethhdr);
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int batadv_nc_nodes_seq_print_text(struct seq_file *seq, void *offset);
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int batadv_nc_init_debugfs(struct batadv_priv *bat_priv);
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#else /* ifdef CONFIG_BATMAN_ADV_NC */
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static inline int batadv_nc_init(struct batadv_priv *bat_priv)
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{
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return 0;
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}
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static inline void batadv_nc_free(struct batadv_priv *bat_priv)
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{
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return;
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}
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static inline void
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batadv_nc_update_nc_node(struct batadv_priv *bat_priv,
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struct batadv_orig_node *orig_node,
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struct batadv_orig_node *orig_neigh_node,
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struct batadv_ogm_packet *ogm_packet,
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int is_single_hop_neigh)
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{
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return;
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}
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static inline void
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batadv_nc_purge_orig(struct batadv_priv *bat_priv,
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struct batadv_orig_node *orig_node,
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bool (*to_purge)(struct batadv_priv *,
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struct batadv_nc_node *))
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{
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return;
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}
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static inline void batadv_nc_init_bat_priv(struct batadv_priv *bat_priv)
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{
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return;
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}
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static inline void batadv_nc_init_orig(struct batadv_orig_node *orig_node)
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{
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return;
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}
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static inline bool batadv_nc_skb_forward(struct sk_buff *skb,
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struct batadv_neigh_node *neigh_node,
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struct ethhdr *ethhdr)
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{
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return false;
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}
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static inline int batadv_nc_nodes_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_nc_init_debugfs(struct batadv_priv *bat_priv)
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{
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return 0;
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}
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#endif /* ifdef CONFIG_BATMAN_ADV_NC */
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#endif /* _NET_BATMAN_ADV_NETWORK_CODING_H_ */
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