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/* $KAME: rtadvd.h,v 1.26 2003/08/05 12:34:23 itojun Exp $ */
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (C) 1998 WIDE Project.
* Copyright (C) 2011 Hiroki Sato <hrs@FreeBSD.org>
* 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.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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.
*/
#define ELM_MALLOC(p,error_action) \
do { \
p = malloc(sizeof(*p)); \
if (p == NULL) { \
syslog(LOG_ERR, "<%s> malloc failed: %s", \
__func__, strerror(errno)); \
error_action; \
} \
memset(p, 0, sizeof(*p)); \
} while(0)
#define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
{{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
#define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
{{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
#define IN6ADDR_SITELOCAL_ALLROUTERS_INIT \
{{{ 0xff, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
extern struct sockaddr_in6 sin6_linklocal_allnodes;
extern struct sockaddr_in6 sin6_linklocal_allrouters;
extern struct sockaddr_in6 sin6_sitelocal_allrouters;
/*
* RFC 3542 API deprecates IPV6_PKTINFO in favor of
* IPV6_RECVPKTINFO
*/
#ifndef IPV6_RECVPKTINFO
#ifdef IPV6_PKTINFO
#define IPV6_RECVPKTINFO IPV6_PKTINFO
#endif
#endif
/*
* RFC 3542 API deprecates IPV6_HOPLIMIT in favor of
* IPV6_RECVHOPLIMIT
*/
#ifndef IPV6_RECVHOPLIMIT
#ifdef IPV6_HOPLIMIT
#define IPV6_RECVHOPLIMIT IPV6_HOPLIMIT
#endif
#endif
/* protocol constants and default values */
#define DEF_MAXRTRADVINTERVAL 600
#define DEF_ADVLINKMTU 0
#define DEF_ADVREACHABLETIME 0
#define DEF_ADVRETRANSTIMER 0
#define DEF_ADVCURHOPLIMIT 64
#define DEF_ADVVALIDLIFETIME 2592000
#define DEF_ADVPREFERREDLIFETIME 604800
#define MAXROUTERLIFETIME 9000
#define MIN_MAXINTERVAL 4
#define MAX_MAXINTERVAL 1800
#define MIN_MININTERVAL 3
#define MAXREACHABLETIME 3600000
#define MAX_INITIAL_RTR_ADVERT_INTERVAL 16
#define MAX_INITIAL_RTR_ADVERTISEMENTS 3
#define MAX_FINAL_RTR_ADVERTISEMENTS 3
#define MIN_DELAY_BETWEEN_RAS 3
#define MAX_RA_DELAY_TIME 500000 /* usec */
#define PREFIX_FROM_KERNEL 1
#define PREFIX_FROM_CONFIG 2
#define PREFIX_FROM_DYNAMIC 3
struct prefix {
TAILQ_ENTRY(prefix) pfx_next;
struct rainfo *pfx_rainfo; /* back pointer to the interface */
/*
* Expiration timer. This is used when a prefix derived from
* the kernel is deleted.
*/
struct rtadvd_timer *pfx_timer;
uint32_t pfx_validlifetime; /* AdvValidLifetime */
uint32_t pfx_vltimeexpire; /* Expiration of vltime */
uint32_t pfx_preflifetime; /* AdvPreferredLifetime */
uint32_t pfx_pltimeexpire; /* Expiration of pltime */
int pfx_onlinkflg; /* bool: AdvOnLinkFlag */
int pfx_autoconfflg; /* bool: AdvAutonomousFlag */
int pfx_prefixlen;
int pfx_origin; /* From kernel or config */
struct in6_addr pfx_prefix;
};
struct rtinfo {
TAILQ_ENTRY(rtinfo) rti_next;
uint32_t rti_ltime; /* route lifetime */
int rti_rtpref; /* route preference */
int rti_prefixlen;
struct in6_addr rti_prefix;
};
struct rdnss_addr {
TAILQ_ENTRY(rdnss_addr) ra_next;
struct in6_addr ra_dns; /* DNS server entry */
};
struct rdnss {
TAILQ_ENTRY(rdnss) rd_next;
TAILQ_HEAD(, rdnss_addr) rd_list; /* list of DNS servers */
uint32_t rd_ltime; /* number of seconds valid */
};
/*
* The maximum length of a domain name in a DNS search list is calculated
* by a domain name + length fields per 63 octets + a zero octet at
* the tail and adding 8 octet boundary padding.
*/
#define _DNAME_LABELENC_MAXLEN \
(NI_MAXHOST + (NI_MAXHOST / 64 + 1) + 1)
#define DNAME_LABELENC_MAXLEN \
(_DNAME_LABELENC_MAXLEN + 8 - _DNAME_LABELENC_MAXLEN % 8)
struct dnssl_addr {
TAILQ_ENTRY(dnssl_addr) da_next;
int da_len; /* length of entry */
char da_dom[DNAME_LABELENC_MAXLEN]; /* search domain name entry */
};
struct dnssl {
TAILQ_ENTRY(dnssl) dn_next;
TAILQ_HEAD(, dnssl_addr) dn_list; /* list of search domains */
uint32_t dn_ltime; /* number of seconds valid */
};
struct soliciter {
TAILQ_ENTRY(soliciter) sol_next;
struct sockaddr_in6 sol_addr;
};
struct rainfo {
/* pointer for list */
TAILQ_ENTRY(rainfo) rai_next;
/* interface information */
struct ifinfo *rai_ifinfo;
int rai_advlinkopt; /* bool: whether include link-layer addr opt */
int rai_advifprefix; /* bool: gather IF prefixes? */
/* Router configuration variables */
uint16_t rai_lifetime; /* AdvDefaultLifetime */
uint16_t rai_maxinterval; /* MaxRtrAdvInterval */
uint16_t rai_mininterval; /* MinRtrAdvInterval */
int rai_managedflg; /* AdvManagedFlag */
int rai_otherflg; /* AdvOtherConfigFlag */
#ifdef DRAFT_IETF_6MAN_IPV6ONLY_FLAG
int rai_ipv6onlyflg; /* AdvIPv6OnlyFlag */
#endif
int rai_rtpref; /* router preference */
uint32_t rai_linkmtu; /* AdvLinkMTU */
uint32_t rai_reachabletime; /* AdvReachableTime */
uint32_t rai_retranstimer; /* AdvRetransTimer */
uint8_t rai_hoplimit; /* AdvCurHopLimit */
TAILQ_HEAD(, prefix) rai_prefix;/* AdvPrefixList(link head) */
int rai_pfxs; /* number of prefixes */
uint16_t rai_clockskew; /* used for consisitency check of lifetimes */
TAILQ_HEAD(, rdnss) rai_rdnss; /* DNS server list */
TAILQ_HEAD(, dnssl) rai_dnssl; /* search domain list */
TAILQ_HEAD(, rtinfo) rai_route; /* route information option (link head) */
int rai_routes; /* number of route information options */
/* actual RA packet data and its length */
size_t rai_ra_datalen;
char *rai_ra_data;
/* info about soliciter */
TAILQ_HEAD(, soliciter) rai_soliciter; /* recent solication source */
};
/* RA information list */
extern TAILQ_HEAD(railist_head_t, rainfo) railist;
/*
* ifi_state:
*
* (INIT)
* |
* | update_ifinfo()
* | update_persist_ifinfo()
* v
* UNCONFIGURED
* | ^
* loadconfig()| |rm_ifinfo(), ra_output()
* (MC join)| |(MC leave)
* | |
* | |
* v |
* TRANSITIVE
* | ^
* ra_output()| |getconfig()
* | |
* | |
* | |
* v |
* CONFIGURED
*
*
*/
#define IFI_STATE_UNCONFIGURED 0
#define IFI_STATE_CONFIGURED 1
#define IFI_STATE_TRANSITIVE 2
struct ifinfo {
TAILQ_ENTRY(ifinfo) ifi_next;
uint16_t ifi_state;
uint16_t ifi_persist;
uint16_t ifi_ifindex;
char ifi_ifname[IFNAMSIZ];
uint8_t ifi_type;
uint16_t ifi_flags;
uint32_t ifi_nd_flags;
uint32_t ifi_phymtu;
struct sockaddr_dl ifi_sdl;
struct rainfo *ifi_rainfo;
struct rainfo *ifi_rainfo_trans;
uint16_t ifi_burstcount;
uint32_t ifi_burstinterval;
struct rtadvd_timer *ifi_ra_timer;
/* timestamp when the latest RA was sent */
struct timespec ifi_ra_lastsent;
uint16_t ifi_rs_waitcount;
/* statistics */
uint64_t ifi_raoutput; /* # of RAs sent */
uint64_t ifi_rainput; /* # of RAs received */
uint64_t ifi_rainconsistent; /* # of inconsistent recv'd RAs */
uint64_t ifi_rsinput; /* # of RSs received */
};
/* Interface list */
extern TAILQ_HEAD(ifilist_head_t, ifinfo) ifilist;
extern char *mcastif;
struct rtadvd_timer *ra_timeout(void *);
void ra_timer_update(void *, struct timespec *);
void ra_output(struct ifinfo *);
int prefix_match(struct in6_addr *, int,
struct in6_addr *, int);
struct ifinfo *if_indextoifinfo(int);
struct prefix *find_prefix(struct rainfo *,
struct in6_addr *, int);
void rtadvd_set_reload(int);
void rtadvd_set_shutdown(int);
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