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contrib/dhcpcd/src/arp.h
- This file was added.
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/* SPDX-License-Identifier: BSD-2-Clause */ | |||||
/* | |||||
* dhcpcd - DHCP client daemon | |||||
* Copyright (c) 2006-2019 Roy Marples <roy@marples.name> | |||||
* All rights reserved | |||||
* Redistribution and use in source and binary forms, with or without | |||||
* modification, are permitted provided that the following conditions | |||||
* are met: | |||||
* 1. Redistributions of source code must retain the above copyright | |||||
* notice, this list of conditions and the following disclaimer. | |||||
* 2. Redistributions in binary form must reproduce the above copyright | |||||
* notice, this list of conditions and the following disclaimer in the | |||||
* documentation and/or other materials provided with the distribution. | |||||
* | |||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |||||
* SUCH DAMAGE. | |||||
*/ | |||||
#ifndef ARP_H | |||||
#define ARP_H | |||||
/* ARP timings from RFC5227 */ | |||||
#define PROBE_WAIT 1 | |||||
#define PROBE_NUM 3 | |||||
#define PROBE_MIN 1 | |||||
#define PROBE_MAX 2 | |||||
#define ANNOUNCE_WAIT 2 | |||||
#define ANNOUNCE_NUM 2 | |||||
#define ANNOUNCE_INTERVAL 2 | |||||
#define MAX_CONFLICTS 10 | |||||
#define RATE_LIMIT_INTERVAL 60 | |||||
#define DEFEND_INTERVAL 10 | |||||
#include "dhcpcd.h" | |||||
#include "if.h" | |||||
#ifdef IN_IFF_DUPLICATED | |||||
/* NetBSD gained RFC 5227 support in the kernel. | |||||
* This means dhcpcd doesn't need ARP except for ARPing support. */ | |||||
#if defined(__NetBSD_Version__) && __NetBSD_Version__ >= 799003900 | |||||
#define KERNEL_RFC5227 | |||||
#endif | |||||
#endif | |||||
struct arp_msg { | |||||
uint16_t op; | |||||
unsigned char sha[HWADDR_LEN]; | |||||
struct in_addr sip; | |||||
unsigned char tha[HWADDR_LEN]; | |||||
struct in_addr tip; | |||||
}; | |||||
struct arp_state { | |||||
TAILQ_ENTRY(arp_state) next; | |||||
struct interface *iface; | |||||
void (*found_cb)(struct arp_state *, const struct arp_msg *); | |||||
void (*not_found_cb)(struct arp_state *); | |||||
void (*announced_cb)(struct arp_state *); | |||||
void (*defend_failed_cb)(struct arp_state *); | |||||
void (*free_cb)(struct arp_state *); | |||||
struct in_addr addr; | |||||
int probes; | |||||
int claims; | |||||
struct timespec defend; | |||||
}; | |||||
TAILQ_HEAD(arp_statehead, arp_state); | |||||
struct iarp_state { | |||||
int bpf_fd; | |||||
unsigned int bpf_flags; | |||||
struct arp_statehead arp_states; | |||||
}; | |||||
#define ARP_STATE(ifp) \ | |||||
((struct iarp_state *)(ifp)->if_data[IF_DATA_ARP]) | |||||
#define ARP_CSTATE(ifp) \ | |||||
((const struct iarp_state *)(ifp)->if_data[IF_DATA_ARP]) | |||||
#ifdef ARP | |||||
struct arp_state *arp_new(struct interface *, const struct in_addr *); | |||||
void arp_probe(struct arp_state *); | |||||
void arp_announce(struct arp_state *); | |||||
void arp_announceaddr(struct dhcpcd_ctx *, const struct in_addr *); | |||||
void arp_ifannounceaddr(struct interface *, const struct in_addr *); | |||||
void arp_cancel(struct arp_state *); | |||||
void arp_free(struct arp_state *); | |||||
void arp_freeaddr(struct interface *, const struct in_addr *); | |||||
void arp_drop(struct interface *); | |||||
#endif /* ARP */ | |||||
#endif /* ARP_H */ |