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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* dhcpcd - IPv6 ND handling
* Copyright (c) 2006-2021 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 IPV6ND_H
#define IPV6ND_H
#ifdef INET6
#include <time.h>
#include "config.h"
#include "dhcpcd.h"
#include "ipv6.h"
struct ra {
TAILQ_ENTRY(ra) next;
struct interface *iface;
struct in6_addr from;
char sfrom[INET6_ADDRSTRLEN];
uint8_t *data;
size_t data_len;
struct timespec acquired;
unsigned char flags;
uint32_t lifetime;
uint32_t reachable;
uint32_t retrans;
uint32_t mtu;
uint8_t hoplimit;
struct ipv6_addrhead addrs;
bool hasdns;
bool expired;
bool willexpire;
bool doexpire;
bool isreachable;
};
TAILQ_HEAD(ra_head, ra);
struct rs_state {
struct nd_router_solicit *rs;
size_t rslen;
int rsprobes;
uint32_t retrans;
#ifdef __sun
int nd_fd;
#endif
};
#define RS_STATE(a) ((struct rs_state *)(ifp)->if_data[IF_DATA_IPV6ND])
#define RS_CSTATE(a) ((const struct rs_state *)(ifp)->if_data[IF_DATA_IPV6ND])
#define RS_STATE_RUNNING(a) (ipv6nd_hasra((a)) && ipv6nd_dadcompleted((a)))
#ifndef MAX_RTR_SOLICITATION_DELAY
#define MAX_RTR_SOLICITATION_DELAY 1 /* seconds */
#define MAX_UNICAST_SOLICIT 3 /* 3 transmissions */
#define RTR_SOLICITATION_INTERVAL 4 /* seconds */
#define MAX_RTR_SOLICITATIONS 3 /* times */
#define MAX_NEIGHBOR_ADVERTISEMENT 3 /* 3 transmissions */
#ifndef IPV6_DEFHLIM
#define IPV6_DEFHLIM 64
#endif
#endif
/* On carrier up, expire known routers after RTR_CARRIER_EXPIRE seconds. */
#define RTR_CARRIER_EXPIRE \
(MAX_RTR_SOLICITATION_DELAY + \
(MAX_RTR_SOLICITATIONS + 1) * \
RTR_SOLICITATION_INTERVAL)
#define MAX_REACHABLE_TIME 3600000 /* milliseconds */
#define REACHABLE_TIME 30000 /* milliseconds */
#define RETRANS_TIMER 1000 /* milliseconds */
#define DELAY_FIRST_PROBE_TIME 5 /* seconds */
int ipv6nd_open(bool);
#ifdef __sun
int ipv6nd_openif(struct interface *);
#endif
void ipv6nd_recvmsg(struct dhcpcd_ctx *, struct msghdr *);
int ipv6nd_rtpref(struct ra *);
void ipv6nd_printoptions(const struct dhcpcd_ctx *,
const struct dhcp_opt *, size_t);
void ipv6nd_startrs(struct interface *);
ssize_t ipv6nd_env(FILE *, const struct interface *);
const struct ipv6_addr *ipv6nd_iffindaddr(const struct interface *ifp,
const struct in6_addr *addr, unsigned int flags);
struct ipv6_addr *ipv6nd_findaddr(struct dhcpcd_ctx *,
const struct in6_addr *, unsigned int);
struct ipv6_addr *ipv6nd_iffindprefix(struct interface *,
const struct in6_addr *, uint8_t);
ssize_t ipv6nd_free(struct interface *);
void ipv6nd_expirera(void *arg);
bool ipv6nd_hasralifetime(const struct interface *, bool);
#define ipv6nd_hasra(i) ipv6nd_hasralifetime((i), false)
bool ipv6nd_hasradhcp(const struct interface *, bool);
void ipv6nd_handleifa(int, struct ipv6_addr *, pid_t);
int ipv6nd_dadcompleted(const struct interface *);
void ipv6nd_advertise(struct ipv6_addr *);
void ipv6nd_startexpire(struct interface *);
void ipv6nd_drop(struct interface *);
void ipv6nd_neighbour(struct dhcpcd_ctx *, struct in6_addr *, bool);
#endif /* INET6 */
#endif /* IPV6ND_H */
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