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 32 void batadv_dat_status_update(struct net_device *net_dev); 33 bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 34 struct sk_buff *skb); 35 bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 36 struct sk_buff *skb, int hdr_size); 37 void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 38 struct sk_buff *skb); 39 bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 40 struct sk_buff *skb, int hdr_size); 41 bool 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 */ 48 static inline void 49 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 50 { 51 uint32_t 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 */ 62 static inline void 63 batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 64 struct batadv_hard_iface *primary_if) 65 { 66 uint32_t 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 74 int batadv_dat_init(struct batadv_priv *bat_priv); 75 void batadv_dat_free(struct batadv_priv *bat_priv); 76 int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset); 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 */ 85 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 86 uint8_t 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 101 102 static inline void batadv_dat_status_update(struct net_device *net_dev) 103 { 104 } 105 106 static inline bool 107 batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 108 struct sk_buff *skb) 109 { 110 return false; 111 } 112 113 static inline bool 114 batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 115 struct sk_buff *skb, int hdr_size) 116 { 117 return false; 118 } 119 120 static inline bool 121 batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 122 struct sk_buff *skb) 123 { 124 return false; 125 } 126 127 static inline bool 128 batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 129 struct sk_buff *skb, int hdr_size) 130 { 131 return false; 132 } 133 134 static inline bool 135 batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 136 struct batadv_forw_packet *forw_packet) 137 { 138 return false; 139 } 140 141 static inline void 142 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 143 { 144 } 145 146 static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 147 struct batadv_hard_iface *iface) 148 { 149 } 150 151 static inline void batadv_arp_change_timeout(struct net_device *soft_iface, 152 const char *name) 153 { 154 } 155 156 static inline int batadv_dat_init(struct batadv_priv *bat_priv) 157 { 158 return 0; 159 } 160 161 static inline void batadv_dat_free(struct batadv_priv *bat_priv) 162 { 163 } 164 165 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 166 uint8_t subtype) 167 { 168 } 169 170 #endif /* CONFIG_BATMAN_ADV_DAT */ 171 172 #endif /* _NET_BATMAN_ADV_ARP_H_ */ 173