1/* Copyright (C) 2011-2013 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, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 17 * 02110-1301, USA 18 */ 19 20#ifndef _NET_BATMAN_ADV_ARP_H_ 21#define _NET_BATMAN_ADV_ARP_H_ 22 23#ifdef CONFIG_BATMAN_ADV_DAT 24 25#include "types.h" 26#include "originator.h" 27 28#include <linux/if_arp.h> 29 30#define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0) 31 32bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 33 struct sk_buff *skb); 34bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 35 struct sk_buff *skb, int hdr_size); 36void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 37 struct sk_buff *skb); 38bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 39 struct sk_buff *skb, int hdr_size); 40bool batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 41 struct batadv_forw_packet *forw_packet); 42 43/** 44 * batadv_dat_init_orig_node_addr - assign a DAT address to the orig_node 45 * @orig_node: the node to assign the DAT address to 46 */ 47static inline void 48batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 49{ 50 uint32_t addr; 51 52 addr = batadv_choose_orig(orig_node->orig, BATADV_DAT_ADDR_MAX); 53 orig_node->dat_addr = (batadv_dat_addr_t)addr; 54} 55 56/** 57 * batadv_dat_init_own_addr - assign a DAT address to the node itself 58 * @bat_priv: the bat priv with all the soft interface information 59 * @primary_if: a pointer to the primary interface 60 */ 61static inline void 62batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 63 struct batadv_hard_iface *primary_if) 64{ 65 uint32_t addr; 66 67 addr = batadv_choose_orig(primary_if->net_dev->dev_addr, 68 BATADV_DAT_ADDR_MAX); 69 70 bat_priv->dat.addr = (batadv_dat_addr_t)addr; 71} 72 73int batadv_dat_init(struct batadv_priv *bat_priv); 74void batadv_dat_free(struct batadv_priv *bat_priv); 75int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset); 76 77/** 78 * batadv_dat_inc_counter - increment the correct DAT packet counter 79 * @bat_priv: the bat priv with all the soft interface information 80 * @subtype: the 4addr subtype of the packet to be counted 81 * 82 * Updates the ethtool statistics for the received packet if it is a DAT subtype 83 */ 84static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 85 uint8_t subtype) 86{ 87 switch (subtype) { 88 case BATADV_P_DAT_DHT_GET: 89 batadv_inc_counter(bat_priv, 90 BATADV_CNT_DAT_GET_RX); 91 break; 92 case BATADV_P_DAT_DHT_PUT: 93 batadv_inc_counter(bat_priv, 94 BATADV_CNT_DAT_PUT_RX); 95 break; 96 } 97} 98 99#else 100 101static inline bool 102batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 103 struct sk_buff *skb) 104{ 105 return false; 106} 107 108static inline bool 109batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 110 struct sk_buff *skb, int hdr_size) 111{ 112 return false; 113} 114 115static inline bool 116batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 117 struct sk_buff *skb) 118{ 119 return false; 120} 121 122static inline bool 123batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 124 struct sk_buff *skb, int hdr_size) 125{ 126 return false; 127} 128 129static inline bool 130batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 131 struct batadv_forw_packet *forw_packet) 132{ 133 return false; 134} 135 136static inline void 137batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 138{ 139} 140 141static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 142 struct batadv_hard_iface *iface) 143{ 144} 145 146static inline void batadv_arp_change_timeout(struct net_device *soft_iface, 147 const char *name) 148{ 149} 150 151static inline int batadv_dat_init(struct batadv_priv *bat_priv) 152{ 153 return 0; 154} 155 156static inline void batadv_dat_free(struct batadv_priv *bat_priv) 157{ 158} 159 160static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 161 uint8_t subtype) 162{ 163} 164 165#endif /* CONFIG_BATMAN_ADV_DAT */ 166 167#endif /* _NET_BATMAN_ADV_ARP_H_ */ 168