usr.sbin/rtadvd/rtadvd.h

   1 /*      $NetBSD: rtadvd.h,v 1.14 2015/06/05 14:09:20 roy Exp $  */
   2 /*      $KAME: rtadvd.h,v 1.30 2005/10/17 14:40:02 suz Exp $    */
   3
   4 /*
   5  * Copyright (C) 1998 WIDE Project.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the project nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #define RTADVD_USER     "_rtadvd"
  34
  35 #define ALLNODES "ff02::1"
  36 #define ALLROUTERS_LINK "ff02::2"
  37 #define ALLROUTERS_SITE "ff05::2"
  38
  39 #define IN6ADDR_SITELOCAL_ALLROUTERS_INIT \
  40         {{{ 0xff, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  41             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 }}}
  42
  43 //extern struct sockaddr_in6 sin6_linklocal_allnodes;
  44 //extern struct sockaddr_in6 sin6_linklocal_allrouters;
  45 extern struct sockaddr_in6 sin6_sitelocal_allrouters;
  46
  47 /* protocol constants and default values */
  48 #define DEF_MAXRTRADVINTERVAL 600
  49 #define DEF_ADVLINKMTU 0
  50 #define DEF_ADVREACHABLETIME 0
  51 #define DEF_ADVRETRANSTIMER 0
  52 #define DEF_ADVCURHOPLIMIT 64
  53 #define DEF_ADVVALIDLIFETIME 2592000
  54 #define DEF_ADVPREFERREDLIFETIME 604800
  55
  56 #define MAXROUTERLIFETIME 9000
  57 #define MIN_MAXINTERVAL 4
  58 #define MAX_MAXINTERVAL 1800
  59 #define MIN_MININTERVAL 3
  60 #define MAXREACHABLETIME 3600000
  61
  62 #define MAX_INITIAL_RTR_ADVERT_INTERVAL  16
  63 #define MAX_INITIAL_RTR_ADVERTISEMENTS    3
  64 #define MAX_FINAL_RTR_ADVERTISEMENTS      3
  65 #define MIN_DELAY_BETWEEN_RAS             3
  66 #define MAX_RA_DELAY_TIME                500000000 /* nsec */
  67
  68 #define PREFIX_FROM_KERNEL 1
  69 #define PREFIX_FROM_CONFIG 2
  70 #define PREFIX_FROM_DYNAMIC 3
  71
  72 struct prefix {
  73         TAILQ_ENTRY(prefix) next;
  74
  75         struct rainfo *rainfo;  /* back pointer to the interface */
  76
  77         struct rtadvd_timer *timer; /* expiration timer.  used when a prefix
  78                                      * derived from the kernel is deleted.
  79                                      */
  80
  81         uint32_t validlifetime; /* AdvValidLifetime */
  82         long    vltimeexpire;   /* expiration of vltime; decrement case only */
  83         uint32_t preflifetime;  /* AdvPreferredLifetime */
  84         long    pltimeexpire;   /* expiration of pltime; decrement case only */
  85         uint16_t onlinkflg;     /* bool: AdvOnLinkFlag */
  86         uint16_t autoconfflg;   /* bool: AdvAutonomousFlag */
  87         int prefixlen;
  88         int origin;             /* from kernel or config */
  89         struct in6_addr prefix;
  90 };
  91
  92 struct rtinfo {
  93         TAILQ_ENTRY(rtinfo) next;
  94
  95         uint32_t ltime; /* route lifetime */
  96         uint16_t rtpref;                /* route preference */
  97         int prefixlen;
  98         struct in6_addr prefix;
  99 };
 100
 101 struct rdnss_addr {
 102         TAILQ_ENTRY(rdnss_addr) next;
 103
 104         struct in6_addr addr;
 105 };
 106
 107 struct rdnss {
 108         TAILQ_ENTRY(rdnss) next;
 109
 110         TAILQ_HEAD(, rdnss_addr) list;
 111         uint32_t lifetime;
 112 };
 113
 114 struct dnssl_domain {
 115         TAILQ_ENTRY(dnssl_domain) next;
 116
 117         int len;
 118         char domain[256];
 119 };
 120
 121 struct dnssl {
 122         TAILQ_ENTRY(dnssl) next;
 123
 124         TAILQ_HEAD(, dnssl_domain) list;
 125         uint32_t lifetime;
 126 };
 127
 128 struct soliciter {
 129         TAILQ_ENTRY(soliciter) next;
 130
 131         struct sockaddr_in6 addr;
 132 };
 133
 134 struct  rainfo {
 135         TAILQ_ENTRY(rainfo) next;
 136
 137         /* timer related parameters */
 138         struct rtadvd_timer *timer;
 139         int initcounter; /* counter for the first few advertisements */
 140         struct timespec lastsent; /* timestamp when the latest RA was sent */
 141         int waiting;            /* number of RS waiting for RA */
 142         struct rainfo *leaving;         /* the config which is leaving */
 143         struct rainfo *leaving_for;     /* the new config to activate */
 144         int leaving_adv;                /* number of RA left to send */
 145
 146         /* interface information */
 147         uint16_t        ifindex;
 148         int             ifflags;
 149         int     advlinkopt;     /* bool: whether include link-layer addr opt */
 150         struct sockaddr_dl *sdl;
 151         char    ifname[16];
 152         uint32_t        phymtu;         /* mtu of the physical interface */
 153
 154         /* Router configuration variables */
 155         uint16_t        lifetime;       /* AdvDefaultLifetime */
 156         uint16_t        maxinterval;    /* MaxRtrAdvInterval */
 157         uint16_t        mininterval;    /* MinRtrAdvInterval */
 158         int     managedflg;     /* AdvManagedFlag */
 159         int     otherflg;       /* AdvOtherConfigFlag */
 160
 161         int     rtpref;         /* router preference */
 162         uint32_t linkmtu;       /* AdvLinkMTU */
 163         uint32_t reachabletime; /* AdvReachableTime */
 164         uint32_t retranstimer;  /* AdvRetransTimer */
 165         uint16_t        hoplimit;       /* AdvCurHopLimit */
 166         TAILQ_HEAD(, prefix) prefix;    /* AdvPrefixList(link head) */
 167         int     pfxs;
 168         uint16_t        clockskew;/* used for consisitency check of lifetimes */
 169
 170         TAILQ_HEAD(, rtinfo) route;
 171         TAILQ_HEAD(, rdnss) rdnss;      /* RDNSS list */
 172         TAILQ_HEAD(, dnssl) dnssl;      /* DNS Search List */
 173
 174         /* actual RA packet data and its length */
 175         size_t ra_datalen;
 176         char *ra_data;
 177
 178         /* statistics */
 179         uint64_t raoutput;      /* number of RAs sent */
 180         uint64_t rainput;       /* number of RAs received */
 181         uint64_t rainconsistent; /* number of RAs inconsistent with ours */
 182         uint64_t rsinput;       /* number of RSs received */
 183
 184         /* info about soliciter */
 185         TAILQ_HEAD(, soliciter) soliciter;      /* recent solication source */
 186 };
 187
 188 extern TAILQ_HEAD(ralist_head_t, rainfo) ralist;
 189
 190 struct rtadvd_timer *ra_timeout(void *);
 191 void ra_timer_update(void *, struct timespec *);
 192 void ra_timer_set_short_delay(struct rainfo *);
 193
 194 int prefix_match(struct in6_addr *, int, struct in6_addr *, int);
 195 struct rainfo *if_indextorainfo(unsigned int);
 196 struct prefix *find_prefix(struct rainfo *, struct in6_addr *, int);