usr.sbin/rtadvd/rtadvd.h

   1 /*      $NetBSD: rtadvd.h,v 1.9 2002/05/29 14:40:32 itojun 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 ALLNODES "ff02::1"
  34 #define ALLROUTERS_LINK "ff02::2"
  35 #define ALLROUTERS_SITE "ff05::2"
  36 #define ANY "::"
  37 #define RTSOLLEN 8
  38
  39 /* protocol constants and default values */
  40 #define DEF_MAXRTRADVINTERVAL 600
  41 #define DEF_ADVLINKMTU 0
  42 #define DEF_ADVREACHABLETIME 0
  43 #define DEF_ADVRETRANSTIMER 0
  44 #define DEF_ADVCURHOPLIMIT 64
  45 #define DEF_ADVVALIDLIFETIME 2592000
  46 #define DEF_ADVPREFERREDLIFETIME 604800
  47
  48 #define MAXROUTERLIFETIME 9000
  49 #define MIN_MAXINTERVAL 4
  50 #define MAX_MAXINTERVAL 1800
  51 #define MIN_MININTERVAL 3
  52 #define MAXREACHABLETIME 3600000
  53
  54 #define MAX_INITIAL_RTR_ADVERT_INTERVAL  16
  55 #define MAX_INITIAL_RTR_ADVERTISEMENTS    3
  56 #define MAX_FINAL_RTR_ADVERTISEMENTS      3
  57 #define MIN_DELAY_BETWEEN_RAS             3
  58 #define MAX_RA_DELAY_TIME                 500000 /* usec */
  59
  60 #define PREFIX_FROM_KERNEL 1
  61 #define PREFIX_FROM_CONFIG 2
  62 #define PREFIX_FROM_DYNAMIC 3
  63
  64 struct prefix {
  65         struct prefix *next;    /* forward link */
  66         struct prefix *prev;    /* previous link */
  67
  68         struct rainfo *rainfo;  /* back pointer to the interface */
  69
  70         struct rtadvd_timer *timer; /* expiration timer.  used when a prefix
  71                                      * derived from the kernel is deleted.
  72                                      */
  73
  74         u_int32_t validlifetime; /* AdvValidLifetime */
  75         long    vltimeexpire;   /* expiration of vltime; decrement case only */
  76         u_int32_t preflifetime; /* AdvPreferredLifetime */
  77         long    pltimeexpire;   /* expiration of pltime; decrement case only */
  78         u_int onlinkflg;        /* bool: AdvOnLinkFlag */
  79         u_int autoconfflg;      /* bool: AdvAutonomousFlag */
  80         int prefixlen;
  81         int origin;             /* from kernel or config */
  82         struct in6_addr prefix;
  83 };
  84
  85 #ifdef ROUTEINFO
  86 struct rtinfo {
  87         struct rtinfo *prev;    /* previous link */
  88         struct rtinfo *next;    /* forward link */
  89
  90         u_int32_t ltime;        /* route lifetime */
  91         u_int rtpref;           /* route preference */
  92         int prefixlen;
  93         struct in6_addr prefix;
  94 };
  95 #endif
  96
  97 struct soliciter {
  98         struct soliciter *next;
  99         struct sockaddr_in6 addr;
 100 };
 101
 102 struct  rainfo {
 103         /* pointer for list */
 104         struct  rainfo *next;
 105
 106         /* timer related parameters */
 107         struct rtadvd_timer *timer;
 108         int initcounter; /* counter for the first few advertisements */
 109         struct timeval lastsent; /* timestamp when the latest RA was sent */
 110         int waiting;            /* number of RS waiting for RA */
 111
 112         /* interface information */
 113         int     ifindex;
 114         int     advlinkopt;     /* bool: whether include link-layer addr opt */
 115         struct sockaddr_dl *sdl;
 116         char    ifname[16];
 117         int     phymtu;         /* mtu of the physical interface */
 118
 119         /* Router configuration variables */
 120         u_short lifetime;       /* AdvDefaultLifetime */
 121         u_int   maxinterval;    /* MaxRtrAdvInterval */
 122         u_int   mininterval;    /* MinRtrAdvInterval */
 123         int     managedflg;     /* AdvManagedFlag */
 124         int     otherflg;       /* AdvOtherConfigFlag */
 125
 126         int     rtpref;         /* router preference */
 127         u_int32_t linkmtu;      /* AdvLinkMTU */
 128         u_int32_t reachabletime; /* AdvReachableTime */
 129         u_int32_t retranstimer; /* AdvRetransTimer */
 130         u_int   hoplimit;       /* AdvCurHopLimit */
 131         struct prefix prefix;   /* AdvPrefixList(link head) */
 132         int     pfxs;           /* number of prefixes */
 133         long    clockskew;      /* used for consisitency check of lifetimes */
 134
 135 #ifdef ROUTEINFO
 136         struct rtinfo route;    /* route information option (link head) */
 137         int     routes;         /* number of route information options */
 138 #endif
 139
 140         /* actual RA packet data and its length */
 141         size_t ra_datalen;
 142         u_char *ra_data;
 143
 144         /* statistics */
 145         u_quad_t raoutput;      /* number of RAs sent */
 146         u_quad_t rainput;       /* number of RAs received */
 147         u_quad_t rainconsistent; /* number of RAs inconsistent with ours */
 148         u_quad_t rsinput;       /* number of RSs received */
 149
 150         /* info about soliciter */
 151         struct soliciter *soliciter;    /* recent solication source */
 152 };
 153
 154 struct rtadvd_timer *ra_timeout __P((void *));
 155 void ra_timer_update __P((void *, struct timeval *));
 156
 157 int prefix_match __P((struct in6_addr *, int, struct in6_addr *, int));
 158 struct rainfo *if_indextorainfo __P((int));
 159 struct prefix *find_prefix __P((struct rainfo *, struct in6_addr *, int));
 160
 161 extern struct in6_addr in6a_site_allrouters;