1/* Copyright (C) 2011-2015 B.A.T.M.A.N. contributors: 2 * 3 * Antonio Quartulli 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of version 2 of the GNU General Public 7 * License as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, but 10 * WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, see <http://www.gnu.org/licenses/>. 16 */ 17 18#ifndef _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ 19#define _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ 20 21#include "main.h" 22 23#include <linux/compiler.h> 24#include <linux/netdevice.h> 25#include <linux/types.h> 26 27#include "originator.h" 28#include "packet.h" 29 30struct seq_file; 31struct sk_buff; 32 33#ifdef CONFIG_BATMAN_ADV_DAT 34 35/* BATADV_DAT_ADDR_MAX - maximum address value in the DHT space */ 36#define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0) 37 38void batadv_dat_status_update(struct net_device *net_dev); 39bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 40 struct sk_buff *skb); 41bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 42 struct sk_buff *skb, int hdr_size); 43void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 44 struct sk_buff *skb); 45bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 46 struct sk_buff *skb, int hdr_size); 47bool batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 48 struct batadv_forw_packet *forw_packet); 49 50/** 51 * batadv_dat_init_orig_node_addr - assign a DAT address to the orig_node 52 * @orig_node: the node to assign the DAT address to 53 */ 54static inline void 55batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 56{ 57 u32 addr; 58 59 addr = batadv_choose_orig(orig_node->orig, BATADV_DAT_ADDR_MAX); 60 orig_node->dat_addr = (batadv_dat_addr_t)addr; 61} 62 63/** 64 * batadv_dat_init_own_addr - assign a DAT address to the node itself 65 * @bat_priv: the bat priv with all the soft interface information 66 * @primary_if: a pointer to the primary interface 67 */ 68static inline void 69batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 70 struct batadv_hard_iface *primary_if) 71{ 72 u32 addr; 73 74 addr = batadv_choose_orig(primary_if->net_dev->dev_addr, 75 BATADV_DAT_ADDR_MAX); 76 77 bat_priv->dat.addr = (batadv_dat_addr_t)addr; 78} 79 80int batadv_dat_init(struct batadv_priv *bat_priv); 81void batadv_dat_free(struct batadv_priv *bat_priv); 82int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset); 83 84/** 85 * batadv_dat_inc_counter - increment the correct DAT packet counter 86 * @bat_priv: the bat priv with all the soft interface information 87 * @subtype: the 4addr subtype of the packet to be counted 88 * 89 * Updates the ethtool statistics for the received packet if it is a DAT subtype 90 */ 91static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 92 u8 subtype) 93{ 94 switch (subtype) { 95 case BATADV_P_DAT_DHT_GET: 96 batadv_inc_counter(bat_priv, 97 BATADV_CNT_DAT_GET_RX); 98 break; 99 case BATADV_P_DAT_DHT_PUT: 100 batadv_inc_counter(bat_priv, 101 BATADV_CNT_DAT_PUT_RX); 102 break; 103 } 104} 105 106#else 107 108static inline void batadv_dat_status_update(struct net_device *net_dev) 109{ 110} 111 112static inline bool 113batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 114 struct sk_buff *skb) 115{ 116 return false; 117} 118 119static inline bool 120batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 121 struct sk_buff *skb, int hdr_size) 122{ 123 return false; 124} 125 126static inline bool 127batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 128 struct sk_buff *skb) 129{ 130 return false; 131} 132 133static inline bool 134batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 135 struct sk_buff *skb, int hdr_size) 136{ 137 return false; 138} 139 140static inline bool 141batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 142 struct batadv_forw_packet *forw_packet) 143{ 144 return false; 145} 146 147static inline void 148batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 149{ 150} 151 152static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 153 struct batadv_hard_iface *iface) 154{ 155} 156 157static inline void batadv_arp_change_timeout(struct net_device *soft_iface, 158 const char *name) 159{ 160} 161 162static inline int batadv_dat_init(struct batadv_priv *bat_priv) 163{ 164 return 0; 165} 166 167static inline void batadv_dat_free(struct batadv_priv *bat_priv) 168{ 169} 170 171static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 172 u8 subtype) 173{ 174} 175 176#endif /* CONFIG_BATMAN_ADV_DAT */ 177 178#endif /* _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ */ 179