distributed-arp-table.h (4823B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2/* Copyright (C) B.A.T.M.A.N. contributors: 3 * 4 * Antonio Quartulli 5 */ 6 7#ifndef _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ 8#define _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ 9 10#include "main.h" 11 12#include <linux/compiler.h> 13#include <linux/netdevice.h> 14#include <linux/netlink.h> 15#include <linux/skbuff.h> 16#include <linux/types.h> 17#include <uapi/linux/batadv_packet.h> 18 19#include "originator.h" 20 21#ifdef CONFIG_BATMAN_ADV_DAT 22 23/* BATADV_DAT_ADDR_MAX - maximum address value in the DHT space */ 24#define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0) 25 26void batadv_dat_status_update(struct net_device *net_dev); 27bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 28 struct sk_buff *skb); 29bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 30 struct sk_buff *skb, int hdr_size); 31void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 32 struct sk_buff *skb); 33bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 34 struct sk_buff *skb, int hdr_size); 35void batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv, 36 struct sk_buff *skb, 37 __be16 proto, 38 unsigned short vid); 39void batadv_dat_snoop_incoming_dhcp_ack(struct batadv_priv *bat_priv, 40 struct sk_buff *skb, int hdr_size); 41bool batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 42 struct batadv_forw_packet *forw_packet); 43 44/** 45 * batadv_dat_init_orig_node_addr() - assign a DAT address to the orig_node 46 * @orig_node: the node to assign the DAT address to 47 */ 48static inline void 49batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 50{ 51 u32 addr; 52 53 addr = batadv_choose_orig(orig_node->orig, BATADV_DAT_ADDR_MAX); 54 orig_node->dat_addr = (batadv_dat_addr_t)addr; 55} 56 57/** 58 * batadv_dat_init_own_addr() - assign a DAT address to the node itself 59 * @bat_priv: the bat priv with all the soft interface information 60 * @primary_if: a pointer to the primary interface 61 */ 62static inline void 63batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 64 struct batadv_hard_iface *primary_if) 65{ 66 u32 addr; 67 68 addr = batadv_choose_orig(primary_if->net_dev->dev_addr, 69 BATADV_DAT_ADDR_MAX); 70 71 bat_priv->dat.addr = (batadv_dat_addr_t)addr; 72} 73 74int batadv_dat_init(struct batadv_priv *bat_priv); 75void batadv_dat_free(struct batadv_priv *bat_priv); 76int batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb); 77 78/** 79 * batadv_dat_inc_counter() - increment the correct DAT packet counter 80 * @bat_priv: the bat priv with all the soft interface information 81 * @subtype: the 4addr subtype of the packet to be counted 82 * 83 * Updates the ethtool statistics for the received packet if it is a DAT subtype 84 */ 85static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 86 u8 subtype) 87{ 88 switch (subtype) { 89 case BATADV_P_DAT_DHT_GET: 90 batadv_inc_counter(bat_priv, 91 BATADV_CNT_DAT_GET_RX); 92 break; 93 case BATADV_P_DAT_DHT_PUT: 94 batadv_inc_counter(bat_priv, 95 BATADV_CNT_DAT_PUT_RX); 96 break; 97 } 98} 99 100#else 101 102static inline void batadv_dat_status_update(struct net_device *net_dev) 103{ 104} 105 106static inline bool 107batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 108 struct sk_buff *skb) 109{ 110 return false; 111} 112 113static inline bool 114batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 115 struct sk_buff *skb, int hdr_size) 116{ 117 return false; 118} 119 120static inline bool 121batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 122 struct sk_buff *skb) 123{ 124 return false; 125} 126 127static inline bool 128batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 129 struct sk_buff *skb, int hdr_size) 130{ 131 return false; 132} 133 134static inline void 135batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv, 136 struct sk_buff *skb, __be16 proto, 137 unsigned short vid) 138{ 139} 140 141static inline void 142batadv_dat_snoop_incoming_dhcp_ack(struct batadv_priv *bat_priv, 143 struct sk_buff *skb, int hdr_size) 144{ 145} 146 147static inline bool 148batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 149 struct batadv_forw_packet *forw_packet) 150{ 151 return false; 152} 153 154static inline void 155batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 156{ 157} 158 159static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 160 struct batadv_hard_iface *iface) 161{ 162} 163 164static inline int batadv_dat_init(struct batadv_priv *bat_priv) 165{ 166 return 0; 167} 168 169static inline void batadv_dat_free(struct batadv_priv *bat_priv) 170{ 171} 172 173static inline int 174batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb) 175{ 176 return -EOPNOTSUPP; 177} 178 179static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 180 u8 subtype) 181{ 182} 183 184#endif /* CONFIG_BATMAN_ADV_DAT */ 185 186#endif /* _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ */