1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright (C) 2011-2019 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/types.h> 15 #include <uapi/linux/batadv_packet.h> 16 17 #include "originator.h" 18 19 struct netlink_callback; 20 struct seq_file; 21 struct sk_buff; 22 23 #ifdef CONFIG_BATMAN_ADV_DAT 24 25 /* BATADV_DAT_ADDR_MAX - maximum address value in the DHT space */ 26 #define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0) 27 28 void batadv_dat_status_update(struct net_device *net_dev); 29 bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 30 struct sk_buff *skb); 31 bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 32 struct sk_buff *skb, int hdr_size); 33 void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 34 struct sk_buff *skb); 35 bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 36 struct sk_buff *skb, int hdr_size); 37 void batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv, 38 struct sk_buff *skb, 39 __be16 proto, 40 unsigned short vid); 41 void batadv_dat_snoop_incoming_dhcp_ack(struct batadv_priv *bat_priv, 42 struct sk_buff *skb, int hdr_size); 43 bool batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 44 struct batadv_forw_packet *forw_packet); 45 46 /** 47 * batadv_dat_init_orig_node_addr() - assign a DAT address to the orig_node 48 * @orig_node: the node to assign the DAT address to 49 */ 50 static inline void 51 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 52 { 53 u32 addr; 54 55 addr = batadv_choose_orig(orig_node->orig, BATADV_DAT_ADDR_MAX); 56 orig_node->dat_addr = (batadv_dat_addr_t)addr; 57 } 58 59 /** 60 * batadv_dat_init_own_addr() - assign a DAT address to the node itself 61 * @bat_priv: the bat priv with all the soft interface information 62 * @primary_if: a pointer to the primary interface 63 */ 64 static inline void 65 batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 66 struct batadv_hard_iface *primary_if) 67 { 68 u32 addr; 69 70 addr = batadv_choose_orig(primary_if->net_dev->dev_addr, 71 BATADV_DAT_ADDR_MAX); 72 73 bat_priv->dat.addr = (batadv_dat_addr_t)addr; 74 } 75 76 int batadv_dat_init(struct batadv_priv *bat_priv); 77 void batadv_dat_free(struct batadv_priv *bat_priv); 78 int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset); 79 int batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb); 80 81 /** 82 * batadv_dat_inc_counter() - increment the correct DAT packet counter 83 * @bat_priv: the bat priv with all the soft interface information 84 * @subtype: the 4addr subtype of the packet to be counted 85 * 86 * Updates the ethtool statistics for the received packet if it is a DAT subtype 87 */ 88 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 89 u8 subtype) 90 { 91 switch (subtype) { 92 case BATADV_P_DAT_DHT_GET: 93 batadv_inc_counter(bat_priv, 94 BATADV_CNT_DAT_GET_RX); 95 break; 96 case BATADV_P_DAT_DHT_PUT: 97 batadv_inc_counter(bat_priv, 98 BATADV_CNT_DAT_PUT_RX); 99 break; 100 } 101 } 102 103 #else 104 105 static inline void batadv_dat_status_update(struct net_device *net_dev) 106 { 107 } 108 109 static inline bool 110 batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 111 struct sk_buff *skb) 112 { 113 return false; 114 } 115 116 static inline bool 117 batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 118 struct sk_buff *skb, int hdr_size) 119 { 120 return false; 121 } 122 123 static inline bool 124 batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 125 struct sk_buff *skb) 126 { 127 return false; 128 } 129 130 static inline bool 131 batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 132 struct sk_buff *skb, int hdr_size) 133 { 134 return false; 135 } 136 137 static inline void 138 batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv, 139 struct sk_buff *skb, __be16 proto, 140 unsigned short vid) 141 { 142 } 143 144 static inline void 145 batadv_dat_snoop_incoming_dhcp_ack(struct batadv_priv *bat_priv, 146 struct sk_buff *skb, int hdr_size) 147 { 148 } 149 150 static inline bool 151 batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 152 struct batadv_forw_packet *forw_packet) 153 { 154 return false; 155 } 156 157 static inline void 158 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 159 { 160 } 161 162 static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 163 struct batadv_hard_iface *iface) 164 { 165 } 166 167 static inline void batadv_arp_change_timeout(struct net_device *soft_iface, 168 const char *name) 169 { 170 } 171 172 static inline int batadv_dat_init(struct batadv_priv *bat_priv) 173 { 174 return 0; 175 } 176 177 static inline void batadv_dat_free(struct batadv_priv *bat_priv) 178 { 179 } 180 181 static inline int 182 batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb) 183 { 184 return -EOPNOTSUPP; 185 } 186 187 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 188 u8 subtype) 189 { 190 } 191 192 #endif /* CONFIG_BATMAN_ADV_DAT */ 193 194 #endif /* _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ */ 195