db82af41db
Options for DNS Configuration) into rtadvd(8) and rtsold(8). DNS information received by rtsold(8) will go to resolv.conf(5) by resolvconf(8) script. This is based on work by J.R. Oldroyd (kern/156259) but revised extensively[1]. - rtadvd(8) now supports "noifprefix" to disable gathering on-link prefixes from interfaces when no "addr" is specified[2]. An entry in rtadvd.conf with "noifprefix" + no "addr" generates an RA message with no prefix information option. - rtadvd(8) now supports RTM_IFANNOUNCE message to fix crashes when an interface is added or removed. - Correct bogus ND_OPT_ROUTE_INFO value to one in RFC 4191. Reviewed by: bz[1] PR: kern/156259 [1] PR: bin/152458 [2]
242 lines
7.5 KiB
C
242 lines
7.5 KiB
C
/* $FreeBSD$ */
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/* $KAME: rtadvd.h,v 1.26 2003/08/05 12:34:23 itojun Exp $ */
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/*
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* Copyright (C) 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
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{{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }}}
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#define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
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{{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
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#define IN6ADDR_SITELOCAL_ALLROUTERS_INIT \
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{{{ 0xff, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
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extern struct sockaddr_in6 sin6_linklocal_allnodes;
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extern struct sockaddr_in6 sin6_linklocal_allrouters;
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extern struct sockaddr_in6 sin6_sitelocal_allrouters;
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/*
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* RFC 3542 API deprecates IPV6_PKTINFO in favor of
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* IPV6_RECVPKTINFO
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*/
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#ifndef IPV6_RECVPKTINFO
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#ifdef IPV6_PKTINFO
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#define IPV6_RECVPKTINFO IPV6_PKTINFO
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#endif
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#endif
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/*
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* RFC 3542 API deprecates IPV6_HOPLIMIT in favor of
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* IPV6_RECVHOPLIMIT
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*/
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#ifndef IPV6_RECVHOPLIMIT
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#ifdef IPV6_HOPLIMIT
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#define IPV6_RECVHOPLIMIT IPV6_HOPLIMIT
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#endif
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#endif
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/* protocol constants and default values */
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#define DEF_MAXRTRADVINTERVAL 600
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#define DEF_ADVLINKMTU 0
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#define DEF_ADVREACHABLETIME 0
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#define DEF_ADVRETRANSTIMER 0
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#define DEF_ADVCURHOPLIMIT 64
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#define DEF_ADVVALIDLIFETIME 2592000
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#define DEF_ADVPREFERREDLIFETIME 604800
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#define MAXROUTERLIFETIME 9000
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#define MIN_MAXINTERVAL 4
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#define MAX_MAXINTERVAL 1800
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#define MIN_MININTERVAL 3
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#define MAXREACHABLETIME 3600000
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#define MAX_INITIAL_RTR_ADVERT_INTERVAL 16
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#define MAX_INITIAL_RTR_ADVERTISEMENTS 3
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#define MAX_FINAL_RTR_ADVERTISEMENTS 3
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#define MIN_DELAY_BETWEEN_RAS 3
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#define MAX_RA_DELAY_TIME 500000 /* usec */
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#define PREFIX_FROM_KERNEL 1
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#define PREFIX_FROM_CONFIG 2
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#define PREFIX_FROM_DYNAMIC 3
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struct prefix {
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TAILQ_ENTRY(prefix) pfx_next;
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struct rainfo *pfx_rainfo; /* back pointer to the interface */
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/*
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* Expiration timer. This is used when a prefix derived from
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* the kernel is deleted.
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*/
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struct rtadvd_timer *pfx_timer;
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u_int32_t pfx_validlifetime; /* AdvValidLifetime */
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long pfx_vltimeexpire; /* Expiration of vltime */
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u_int32_t pfx_preflifetime; /* AdvPreferredLifetime */
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long pfx_pltimeexpire; /* Expiration of pltime */
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u_int pfx_onlinkflg; /* bool: AdvOnLinkFlag */
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u_int pfx_autoconfflg; /* bool: AdvAutonomousFlag */
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int pfx_prefixlen;
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int pfx_origin; /* From kernel or config */
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struct in6_addr pfx_prefix;
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};
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#ifdef ROUTEINFO
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struct rtinfo {
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TAILQ_ENTRY(rtinfo) rti_next;
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u_int32_t rti_ltime; /* route lifetime */
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u_int rti_rtpref; /* route preference */
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int rti_prefixlen;
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struct in6_addr rti_prefix;
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};
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#endif
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struct rdnss_addr {
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TAILQ_ENTRY(rdnss_addr) ra_next;
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struct in6_addr ra_dns; /* DNS server entry */
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};
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struct rdnss {
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TAILQ_ENTRY(rdnss) rd_next;
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TAILQ_HEAD(, rdnss_addr) rd_list; /* list of DNS servers */
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int rd_cnt; /* number of DNS servers */
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u_int32_t rd_ltime; /* number of seconds valid */
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};
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/*
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* The maximum length of a domain name in a DNS search list is calculated
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* by a domain name + length fields per 63 octets + a zero octet at
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* the tail and adding 8 octet boundary padding.
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*/
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#define _DNAME_LABELENC_MAXLEN \
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(NI_MAXHOST + (NI_MAXHOST / 64 + 1) + 1)
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#define DNAME_LABELENC_MAXLEN \
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(_DNAME_LABELENC_MAXLEN + 8 - _DNAME_LABELENC_MAXLEN % 8)
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struct dnssl_addr {
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TAILQ_ENTRY(dnssl_addr) da_next;
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int da_len; /* length of entry */
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char da_dom[DNAME_LABELENC_MAXLEN]; /* search domain name entry */
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};
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struct dnssl {
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TAILQ_ENTRY(dnssl) dn_next;
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TAILQ_HEAD(, dnssl_addr) dn_list; /* list of search domains */
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u_int32_t dn_ltime; /* number of seconds valid */
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};
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struct soliciter {
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TAILQ_ENTRY(soliciter) sol_next;
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struct sockaddr_in6 sol_addr;
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};
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struct rainfo {
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/* pointer for list */
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TAILQ_ENTRY(rainfo) rai_next;
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/* timer related parameters */
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struct rtadvd_timer *rai_timer;
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/* counter for the first few advertisements */
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int rai_initcounter;
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/* timestamp when the latest RA was sent */
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struct timeval rai_lastsent;
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/* number of RS waiting for RA */
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int rai_waiting;
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/* interface information */
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int rai_ifindex;
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int rai_advlinkopt; /* bool: whether include link-layer addr opt */
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int rai_advifprefix; /* bool: gather IF prefixes? */
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struct sockaddr_dl *rai_sdl;
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char rai_ifname[IFNAMSIZ];
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u_int32_t rai_phymtu; /* mtu of the physical interface */
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/* Router configuration variables */
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u_short rai_lifetime; /* AdvDefaultLifetime */
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u_int rai_maxinterval; /* MaxRtrAdvInterval */
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u_int rai_mininterval; /* MinRtrAdvInterval */
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int rai_managedflg; /* AdvManagedFlag */
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int rai_otherflg; /* AdvOtherConfigFlag */
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int rai_rtpref; /* router preference */
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u_int32_t rai_linkmtu; /* AdvLinkMTU */
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u_int32_t rai_reachabletime; /* AdvReachableTime */
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u_int32_t rai_retranstimer; /* AdvRetransTimer */
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u_int rai_hoplimit; /* AdvCurHopLimit */
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TAILQ_HEAD(, prefix) rai_prefix;/* AdvPrefixList(link head) */
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int rai_pfxs; /* number of prefixes */
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long rai_clockskew; /* used for consisitency check of lifetimes */
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TAILQ_HEAD(, rdnss) rai_rdnss; /* DNS server list */
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TAILQ_HEAD(, dnssl) rai_dnssl; /* search domain list */
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#ifdef ROUTEINFO
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TAILQ_HEAD(, rtinfo) rai_route; /* route information option (link head) */
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int rai_routes; /* number of route information options */
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#endif
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/* actual RA packet data and its length */
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size_t rai_ra_datalen;
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u_char *rai_ra_data;
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/* statistics */
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u_quad_t rai_raoutput; /* # of RAs sent */
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u_quad_t rai_rainput; /* # of RAs received */
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u_quad_t rai_rainconsistent; /* # of RAs inconsistent with ours */
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u_quad_t rai_rsinput; /* # of RSs received */
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/* info about soliciter */
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TAILQ_HEAD(, soliciter) rai_soliciter; /* recent solication source */
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};
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/* Interface list including RA information */
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extern TAILQ_HEAD(railist_head_t, rainfo) railist;
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struct rtadvd_timer *ra_timeout(void *);
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void ra_timer_update(void *, struct timeval *);
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int prefix_match(struct in6_addr *, int,
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struct in6_addr *, int);
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struct rainfo *if_indextorainfo(int);
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struct prefix *find_prefix(struct rainfo *,
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struct in6_addr *, int);
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