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/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) 2011-2018 B.A.T.M.A.N. contributors:
*
* Antonio Quartulli
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_
#define _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_
#include "main.h"
#include <linux/compiler.h>
#include <linux/netdevice.h>
#include <linux/types.h>
#include <uapi/linux/batadv_packet.h>
#include "originator.h"
struct netlink_callback;
struct seq_file;
struct sk_buff;
#ifdef CONFIG_BATMAN_ADV_DAT
/* BATADV_DAT_ADDR_MAX - maximum address value in the DHT space */
#define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0)
void batadv_dat_status_update(struct net_device *net_dev);
bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
struct sk_buff *skb);
bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
struct sk_buff *skb, int hdr_size);
void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv,
struct sk_buff *skb);
bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
struct sk_buff *skb, int hdr_size);
bool batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv,
struct batadv_forw_packet *forw_packet);
/**
* batadv_dat_init_orig_node_addr() - assign a DAT address to the orig_node
* @orig_node: the node to assign the DAT address to
*/
static inline void
batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node)
{
u32 addr;
addr = batadv_choose_orig(orig_node->orig, BATADV_DAT_ADDR_MAX);
orig_node->dat_addr = (batadv_dat_addr_t)addr;
}
/**
* batadv_dat_init_own_addr() - assign a DAT address to the node itself
* @bat_priv: the bat priv with all the soft interface information
* @primary_if: a pointer to the primary interface
*/
static inline void
batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
struct batadv_hard_iface *primary_if)
{
u32 addr;
addr = batadv_choose_orig(primary_if->net_dev->dev_addr,
BATADV_DAT_ADDR_MAX);
bat_priv->dat.addr = (batadv_dat_addr_t)addr;
}
int batadv_dat_init(struct batadv_priv *bat_priv);
void batadv_dat_free(struct batadv_priv *bat_priv);
int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset);
int batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb);
/**
* batadv_dat_inc_counter() - increment the correct DAT packet counter
* @bat_priv: the bat priv with all the soft interface information
* @subtype: the 4addr subtype of the packet to be counted
*
* Updates the ethtool statistics for the received packet if it is a DAT subtype
*/
static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv,
u8 subtype)
{
switch (subtype) {
case BATADV_P_DAT_DHT_GET:
batadv_inc_counter(bat_priv,
BATADV_CNT_DAT_GET_RX);
break;
case BATADV_P_DAT_DHT_PUT:
batadv_inc_counter(bat_priv,
BATADV_CNT_DAT_PUT_RX);
break;
}
}
#else
static inline void batadv_dat_status_update(struct net_device *net_dev)
{
}
static inline bool
batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
struct sk_buff *skb)
{
return false;
}
static inline bool
batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
struct sk_buff *skb, int hdr_size)
{
return false;
}
static inline bool
batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv,
struct sk_buff *skb)
{
return false;
}
static inline bool
batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
struct sk_buff *skb, int hdr_size)
{
return false;
}
static inline bool
batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv,
struct batadv_forw_packet *forw_packet)
{
return false;
}
static inline void
batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node)
{
}
static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
struct batadv_hard_iface *iface)
{
}
static inline void batadv_arp_change_timeout(struct net_device *soft_iface,
const char *name)
{
}
static inline int batadv_dat_init(struct batadv_priv *bat_priv)
{
return 0;
}
static inline void batadv_dat_free(struct batadv_priv *bat_priv)
{
}
static inline int
batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb)
{
return -EOPNOTSUPP;
}
static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv,
u8 subtype)
{
}
#endif /* CONFIG_BATMAN_ADV_DAT */
#endif /* _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ */
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