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 26 void batadv_dat_status_update(struct net_device *net_dev); 27 bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 28 struct sk_buff *skb); 29 bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 30 struct sk_buff *skb, int hdr_size); 31 void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 32 struct sk_buff *skb); 33 bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 34 struct sk_buff *skb, int hdr_size); 35 void batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv, 36 struct sk_buff *skb, 37 __be16 proto, 38 unsigned short vid); 39 void batadv_dat_snoop_incoming_dhcp_ack(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 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 */ 62 static inline void 63 batadv_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 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_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 */ 85 static 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 101 102 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 void 135 batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv, 136 struct sk_buff *skb, __be16 proto, 137 unsigned short vid) 138 { 139 } 140 141 static inline void 142 batadv_dat_snoop_incoming_dhcp_ack(struct batadv_priv *bat_priv, 143 struct sk_buff *skb, int hdr_size) 144 { 145 } 146 147 static inline bool 148 batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 149 struct batadv_forw_packet *forw_packet) 150 { 151 return false; 152 } 153 154 static inline void 155 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 156 { 157 } 158 159 static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 160 struct batadv_hard_iface *iface) 161 { 162 } 163 164 static inline int batadv_dat_init(struct batadv_priv *bat_priv) 165 { 166 return 0; 167 } 168 169 static inline void batadv_dat_free(struct batadv_priv *bat_priv) 170 { 171 } 172 173 static inline int 174 batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb) 175 { 176 return -EOPNOTSUPP; 177 } 178 179 static 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_ */ 187