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/* $NetBSD: ipv4ll.h,v 1.10 2015/08/21 10:39:00 roy Exp $ */
/*
* dhcpcd - DHCP client daemon
* Copyright (c) 2006-2015 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 IPV4LL_H
#define IPV4LL_H
#include "arp.h"
extern const struct in_addr inaddr_llmask;
extern const struct in_addr inaddr_llbcast;
#define LINKLOCAL_ADDR 0xa9fe0000
#define LINKLOCAL_MASK IN_CLASSB_NET
#define LINKLOCAL_BRDC (LINKLOCAL_ADDR | ~LINKLOCAL_MASK)
#ifndef IN_LINKLOCAL
# define IN_LINKLOCAL(addr) ((addr & IN_CLASSB_NET) == LINKLOCAL_ADDR)
#endif
struct ipv4ll_state {
struct in_addr addr;
struct arp_state *arp;
unsigned int conflicts;
struct timespec defend;
char randomstate[128];
uint8_t down;
};
#define IPV4LL_STATE(ifp) \
((struct ipv4ll_state *)(ifp)->if_data[IF_DATA_IPV4LL])
#define IPV4LL_CSTATE(ifp) \
((const struct ipv4ll_state *)(ifp)->if_data[IF_DATA_IPV4LL])
#define IPV4LL_STATE_RUNNING(ifp) \
(IPV4LL_CSTATE((ifp)) && !IPV4LL_CSTATE((ifp))->down && \
IN_LINKLOCAL(ntohl(IPV4LL_CSTATE((ifp))->addr.s_addr)))
struct rt* ipv4ll_subnet_route(const struct interface *);
struct rt* ipv4ll_default_route(const struct interface *);
ssize_t ipv4ll_env(char **, const char *, const struct interface *);
void ipv4ll_start(void *);
void ipv4ll_claimed(void *);
void ipv4ll_handle_failure(void *);
#define ipv4ll_free(ifp) ipv4ll_freedrop((ifp), 0);
#define ipv4ll_drop(ifp) ipv4ll_freedrop((ifp), 1);
void ipv4ll_freedrop(struct interface *, int);
#endif
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