1 /* 2 * Copyright (c) 2016 Intel Corporation 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 #ifndef __ARP_H 8 #define __ARP_H 9 10 #if defined(CONFIG_NET_ARP) && defined(CONFIG_NET_NATIVE) 11 12 #include <zephyr/sys/slist.h> 13 #include <zephyr/net/ethernet.h> 14 15 #ifdef __cplusplus 16 extern "C" { 17 #endif 18 19 /** 20 * @brief Address resolution (ARP) library 21 * @defgroup arp ARP Library 22 * @ingroup networking 23 * @{ 24 */ 25 26 #define NET_ARP_HDR(pkt) ((struct net_arp_hdr *)net_pkt_data(pkt)) 27 28 struct net_arp_hdr { 29 uint16_t hwtype; /* HTYPE */ 30 uint16_t protocol; /* PTYPE */ 31 uint8_t hwlen; /* HLEN */ 32 uint8_t protolen; /* PLEN */ 33 uint16_t opcode; 34 struct net_eth_addr src_hwaddr; /* SHA */ 35 uint8_t src_ipaddr[NET_IPV4_ADDR_SIZE]; /* SPA */ 36 struct net_eth_addr dst_hwaddr; /* THA */ 37 uint8_t dst_ipaddr[NET_IPV4_ADDR_SIZE]; /* TPA */ 38 } __packed; 39 40 #define NET_ARP_HTYPE_ETH 1 41 #define NET_ARP_IPV4_PTYPE_SIZE 4 42 43 #define NET_ARP_REQUEST 1 44 #define NET_ARP_REPLY 2 45 46 struct net_pkt *net_arp_prepare(struct net_pkt *pkt, 47 struct in_addr *request_ip, 48 struct in_addr *current_ip); 49 enum net_verdict net_arp_input(struct net_pkt *pkt, 50 struct net_eth_addr *src, 51 struct net_eth_addr *dst); 52 53 int net_arp_clear_pending(struct net_if *iface, 54 struct in_addr *dst); 55 56 struct arp_entry { 57 sys_snode_t node; 58 uint32_t req_start; 59 struct net_if *iface; 60 struct in_addr ip; 61 struct net_eth_addr eth; 62 struct k_fifo pending_queue; 63 }; 64 65 typedef void (*net_arp_cb_t)(struct arp_entry *entry, 66 void *user_data); 67 int net_arp_foreach(net_arp_cb_t cb, void *user_data); 68 69 void net_arp_clear_cache(struct net_if *iface); 70 void net_arp_init(void); 71 void net_arp_update(struct net_if *iface, struct in_addr *src, 72 struct net_eth_addr *hwaddr, bool gratuitous, 73 bool force); 74 75 /** 76 * @} 77 */ 78 79 #ifdef __cplusplus 80 } 81 #endif 82 83 #else /* CONFIG_NET_ARP */ 84 #define net_arp_prepare(_kt, _u1, _u2) _kt 85 #define net_arp_input(...) NET_OK 86 #define net_arp_clear_cache(...) 87 #define net_arp_foreach(...) 0 88 #define net_arp_init(...) 89 #define net_arp_clear_pending(...) 0 90 #define net_arp_update(...) 91 92 #endif /* CONFIG_NET_ARP */ 93 94 #endif /* __ARP_H */ 95
