1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright (C) 2011-2020 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/seq_file.h> 16 #include <linux/skbuff.h> 17 #include <linux/types.h> 18 #include <uapi/linux/batadv_packet.h> 19 20 #include "originator.h" 21 22 #ifdef CONFIG_BATMAN_ADV_DAT 23 24 /* BATADV_DAT_ADDR_MAX - maximum address value in the DHT space */ 25 #define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0) 26 27 void batadv_dat_status_update(struct net_device *net_dev); 28 bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 29 struct sk_buff *skb); 30 bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 31 struct sk_buff *skb, int hdr_size); 32 void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 33 struct sk_buff *skb); 34 bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 35 struct sk_buff *skb, int hdr_size); 36 void batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv, 37 struct sk_buff *skb, 38 __be16 proto, 39 unsigned short vid); 40 void batadv_dat_snoop_incoming_dhcp_ack(struct batadv_priv *bat_priv, 41 struct sk_buff *skb, int hdr_size); 42 bool batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 43 struct batadv_forw_packet *forw_packet); 44 45 /** 46 * batadv_dat_init_orig_node_addr() - assign a DAT address to the orig_node 47 * @orig_node: the node to assign the DAT address to 48 */ 49 static inline void 50 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 51 { 52 u32 addr; 53 54 addr = batadv_choose_orig(orig_node->orig, BATADV_DAT_ADDR_MAX); 55 orig_node->dat_addr = (batadv_dat_addr_t)addr; 56 } 57 58 /** 59 * batadv_dat_init_own_addr() - assign a DAT address to the node itself 60 * @bat_priv: the bat priv with all the soft interface information 61 * @primary_if: a pointer to the primary interface 62 */ 63 static inline void 64 batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 65 struct batadv_hard_iface *primary_if) 66 { 67 u32 addr; 68 69 addr = batadv_choose_orig(primary_if->net_dev->dev_addr, 70 BATADV_DAT_ADDR_MAX); 71 72 bat_priv->dat.addr = (batadv_dat_addr_t)addr; 73 } 74 75 int batadv_dat_init(struct batadv_priv *bat_priv); 76 void batadv_dat_free(struct batadv_priv *bat_priv); 77 int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset); 78 int batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb); 79 80 /** 81 * batadv_dat_inc_counter() - increment the correct DAT packet counter 82 * @bat_priv: the bat priv with all the soft interface information 83 * @subtype: the 4addr subtype of the packet to be counted 84 * 85 * Updates the ethtool statistics for the received packet if it is a DAT subtype 86 */ 87 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 88 u8 subtype) 89 { 90 switch (subtype) { 91 case BATADV_P_DAT_DHT_GET: 92 batadv_inc_counter(bat_priv, 93 BATADV_CNT_DAT_GET_RX); 94 break; 95 case BATADV_P_DAT_DHT_PUT: 96 batadv_inc_counter(bat_priv, 97 BATADV_CNT_DAT_PUT_RX); 98 break; 99 } 100 } 101 102 #else 103 104 static inline void batadv_dat_status_update(struct net_device *net_dev) 105 { 106 } 107 108 static inline bool 109 batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 110 struct sk_buff *skb) 111 { 112 return false; 113 } 114 115 static inline bool 116 batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 117 struct sk_buff *skb, int hdr_size) 118 { 119 return false; 120 } 121 122 static inline bool 123 batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 124 struct sk_buff *skb) 125 { 126 return false; 127 } 128 129 static inline bool 130 batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 131 struct sk_buff *skb, int hdr_size) 132 { 133 return false; 134 } 135 136 static inline void 137 batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv, 138 struct sk_buff *skb, __be16 proto, 139 unsigned short vid) 140 { 141 } 142 143 static inline void 144 batadv_dat_snoop_incoming_dhcp_ack(struct batadv_priv *bat_priv, 145 struct sk_buff *skb, int hdr_size) 146 { 147 } 148 149 static inline bool 150 batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 151 struct batadv_forw_packet *forw_packet) 152 { 153 return false; 154 } 155 156 static inline void 157 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 158 { 159 } 160 161 static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 162 struct batadv_hard_iface *iface) 163 { 164 } 165 166 static inline void batadv_arp_change_timeout(struct net_device *soft_iface, 167 const char *name) 168 { 169 } 170 171 static inline int batadv_dat_init(struct batadv_priv *bat_priv) 172 { 173 return 0; 174 } 175 176 static inline void batadv_dat_free(struct batadv_priv *bat_priv) 177 { 178 } 179 180 static inline int 181 batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb) 182 { 183 return -EOPNOTSUPP; 184 } 185 186 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 187 u8 subtype) 188 { 189 } 190 191 #endif /* CONFIG_BATMAN_ADV_DAT */ 192 193 #endif /* _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ */ 194