1d14f13d75
So that it's possible to register ARP entries manually. Needed for DHCP server implementation, which in unicast mode needs to reply to an IP address that is not registered on the peer interface yet (hence no ARP reply will be sent). It's needed to add an ARP entry manually in that case, as hardware address is already known at that point. Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
94 lines
2.0 KiB
C
94 lines
2.0 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef __ARP_H
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#define __ARP_H
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#if defined(CONFIG_NET_ARP) && defined(CONFIG_NET_NATIVE)
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#include <zephyr/sys/slist.h>
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#include <zephyr/net/ethernet.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Address resolution (ARP) library
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* @defgroup arp ARP Library
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* @ingroup networking
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* @{
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*/
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#define NET_ARP_HDR(pkt) ((struct net_arp_hdr *)net_pkt_data(pkt))
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struct net_arp_hdr {
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uint16_t hwtype; /* HTYPE */
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uint16_t protocol; /* PTYPE */
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uint8_t hwlen; /* HLEN */
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uint8_t protolen; /* PLEN */
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uint16_t opcode;
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struct net_eth_addr src_hwaddr; /* SHA */
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uint8_t src_ipaddr[NET_IPV4_ADDR_SIZE]; /* SPA */
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struct net_eth_addr dst_hwaddr; /* THA */
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uint8_t dst_ipaddr[NET_IPV4_ADDR_SIZE]; /* TPA */
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} __packed;
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#define NET_ARP_HTYPE_ETH 1
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#define NET_ARP_IPV4_PTYPE_SIZE 4
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#define NET_ARP_REQUEST 1
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#define NET_ARP_REPLY 2
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struct net_pkt *net_arp_prepare(struct net_pkt *pkt,
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struct in_addr *request_ip,
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struct in_addr *current_ip);
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enum net_verdict net_arp_input(struct net_pkt *pkt,
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struct net_eth_hdr *eth_hdr);
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int net_arp_clear_pending(struct net_if *iface,
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struct in_addr *dst);
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struct arp_entry {
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sys_snode_t node;
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uint32_t req_start;
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struct net_if *iface;
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struct in_addr ip;
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struct net_eth_addr eth;
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struct k_fifo pending_queue;
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};
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typedef void (*net_arp_cb_t)(struct arp_entry *entry,
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void *user_data);
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int net_arp_foreach(net_arp_cb_t cb, void *user_data);
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void net_arp_clear_cache(struct net_if *iface);
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void net_arp_init(void);
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void net_arp_update(struct net_if *iface, struct in_addr *src,
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struct net_eth_addr *hwaddr, bool gratuitous,
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bool force);
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#else /* CONFIG_NET_ARP */
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#define net_arp_prepare(_kt, _u1, _u2) _kt
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#define net_arp_input(...) NET_OK
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#define net_arp_clear_cache(...)
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#define net_arp_foreach(...) 0
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#define net_arp_init(...)
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#define net_arp_clear_pending(...) 0
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#define net_arp_update(...)
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#endif /* CONFIG_NET_ARP */
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#endif /* __ARP_H */
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