net/batman-adv/distributed-arp-table.h

Source file repositories/reference/linux-study-clean/net/batman-adv/distributed-arp-table.h

File Facts

System
Linux kernel
Corpus path
net/batman-adv/distributed-arp-table.h
Extension
.h
Size
4823 bytes
Lines
187
Domain
Networking Core
Bucket
Sockets, Protocols, Packet Path, And Network Policy
Inferred role
Networking Core: implementation source
Status
source implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

Dependency Surface

Detected Declarations

Annotated Snippet

#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/netlink.h>
#include <linux/skbuff.h>
#include <linux/types.h>
#include <uapi/linux/batadv_packet.h>

#include "originator.h"

#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);
void batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv,
					struct sk_buff *skb,
					__be16 proto,
					unsigned short vid);
void batadv_dat_snoop_incoming_dhcp_ack(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 mesh 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_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 mesh 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;

Annotation

Implementation Notes