/* SPDX-License-Identifier: GPL-2.0 */ /* Copyright (C) B.A.T.M.A.N. contributors: * * Antonio Quartulli */ #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 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_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 void batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv, struct sk_buff *skb, __be16 proto, unsigned short vid) { } static inline void batadv_dat_snoop_incoming_dhcp_ack(struct batadv_priv *bat_priv, struct sk_buff *skb, int hdr_size) { } 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 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_ */