rtadvd.tproj/rtadvd.h

   1 /*      $KAME: rtadvd.h,v 1.26 2003/08/05 12:34:23 itojun Exp $ */
   2
   3 /*
   4  * Copyright (C) 1998 WIDE Project.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the project nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #define ROUTEINFO       1
  33
  34 #define ALLNODES "ff02::1"
  35 #define ALLROUTERS_LINK "ff02::2"
  36 #define ALLROUTERS_SITE "ff05::2"
  37 #define ANY "::"
  38 #define RTSOLLEN 8
  39
  40 /* protocol constants and default values */
  41 #define DEF_MAXRTRADVINTERVAL 600
  42 #define DEF_ADVLINKMTU 0
  43 #define DEF_ADVREACHABLETIME 0
  44 #define DEF_ADVRETRANSTIMER 0
  45 #define DEF_ADVCURHOPLIMIT 64
  46 #define DEF_ADVVALIDLIFETIME 2592000
  47 #define DEF_ADVPREFERREDLIFETIME 604800
  48
  49 #define MAXROUTERLIFETIME 9000
  50 #define MIN_MAXINTERVAL 4
  51 #define MAX_MAXINTERVAL 1800
  52 #define MIN_MININTERVAL 3
  53 #define MAXREACHABLETIME 3600000
  54
  55 #define MAX_INITIAL_RTR_ADVERT_INTERVAL  16
  56 #define MAX_INITIAL_RTR_ADVERTISEMENTS    3
  57 #define MAX_FINAL_RTR_ADVERTISEMENTS      3
  58 #define MIN_DELAY_BETWEEN_RAS             3
  59 #define MAX_RA_DELAY_TIME                 500000 /* usec */
  60
  61 #define PREFIX_FROM_KERNEL 1
  62 #define PREFIX_FROM_CONFIG 2
  63 #define PREFIX_FROM_DYNAMIC 3
  64
  65 struct prefix {
  66         struct prefix *next;    /* forward link */
  67         struct prefix *prev;    /* previous link */
  68
  69         struct rainfo *rainfo;  /* back pointer to the interface */
  70
  71         struct rtadvd_timer *timer; /* expiration timer.  used when a prefix
  72                                      * derived from the kernel is deleted.
  73                                      */
  74
  75         u_int32_t validlifetime; /* AdvValidLifetime */
  76         long    vltimeexpire;   /* expiration of vltime; decrement case only */
  77         u_int32_t preflifetime; /* AdvPreferredLifetime */
  78         long    pltimeexpire;   /* expiration of pltime; decrement case only */
  79         u_int onlinkflg;        /* bool: AdvOnLinkFlag */
  80         u_int autoconfflg;      /* bool: AdvAutonomousFlag */
  81         int prefixlen;
  82         int origin;             /* from kernel or config */
  83         struct in6_addr prefix;
  84 };
  85
  86 #ifdef ROUTEINFO
  87 struct rtinfo {
  88         struct rtinfo *prev;    /* previous link */
  89         struct rtinfo *next;    /* forward link */
  90
  91         u_int32_t ltime;        /* route lifetime */
  92         u_int rtpref;           /* route preference */
  93         int prefixlen;
  94         struct in6_addr prefix;
  95 };
  96 #endif
  97
  98 struct soliciter {
  99         struct soliciter *next;
 100         struct sockaddr_in6 addr;
 101 };
 102
 103 struct rdnss {
 104         struct rdnss *next;     /* forward link */
 105         struct rdnss *prev;     /* previous link */
 106
 107         struct in6_addr addr;
 108 };
 109
 110 struct dnssl {
 111         struct dnssl *next;
 112         struct dnssl *prev;
 113
 114         char domain[1];
 115 };
 116
 117 struct  rainfo {
 118         /* pointer for list */
 119         struct  rainfo *next;
 120
 121         /* timer related parameters */
 122         struct rtadvd_timer *timer;
 123         int initcounter; /* counter for the first few advertisements */
 124         struct timeval lastsent; /* timestamp when the latest RA was sent */
 125         int waiting;            /* number of RS waiting for RA */
 126
 127         /* interface information */
 128         int     ifindex;
 129         int     advlinkopt;     /* bool: whether include link-layer addr opt */
 130         struct sockaddr_dl *sdl;
 131         char    ifname[16];
 132         int     phymtu;         /* mtu of the physical interface */
 133
 134         /* Router configuration variables */
 135         u_short lifetime;       /* AdvDefaultLifetime */
 136         u_int   maxinterval;    /* MaxRtrAdvInterval */
 137         u_int   mininterval;    /* MinRtrAdvInterval */
 138         int     managedflg;     /* AdvManagedFlag */
 139         int     otherflg;       /* AdvOtherConfigFlag */
 140
 141         int     rtpref;         /* router preference */
 142         u_int32_t linkmtu;      /* AdvLinkMTU */
 143         u_int32_t reachabletime; /* AdvReachableTime */
 144         u_int32_t retranstimer; /* AdvRetransTimer */
 145         u_int   hoplimit;       /* AdvCurHopLimit */
 146         struct prefix prefix;   /* AdvPrefixList(link head) */
 147         int     pfxs;           /* number of prefixes */
 148         long    clockskew;      /* used for consisitency check of lifetimes */
 149
 150 #ifdef ROUTEINFO
 151         struct rtinfo route;    /* route information option (link head) */
 152         int     routes;         /* number of route information options */
 153 #endif
 154
 155         /* Recursive DNS Servers RFC5006 */
 156         struct rdnss rdnss_list;
 157         int rdnss_length;
 158         u_int32_t rdnss_lifetime;
 159
 160         /* DNS Search List RFC6106 */
 161         struct dnssl dnssl_list;
 162         int dnssl_length;
 163         u_int32_t dnssl_lifetime;
 164         u_int32_t dnssl_option_length;
 165
 166         /* actual RA packet data and its length */
 167         size_t ra_datalen;
 168         u_char *ra_data;
 169
 170         /* statistics */
 171         u_quad_t raoutput;      /* number of RAs sent */
 172         u_quad_t rainput;       /* number of RAs received */
 173         u_quad_t rainconsistent; /* number of RAs inconsistent with ours */
 174         u_quad_t rsinput;       /* number of RSs received */
 175
 176         /* info about soliciter */
 177         struct soliciter *soliciter;    /* recent solication source */
 178 };
 179
 180 struct rtadvd_timer *ra_timeout(void *);
 181 void ra_timer_update(void *, struct timeval *);
 182
 183 int prefix_match(struct in6_addr *, int, struct in6_addr *, int);
 184 struct rainfo *if_indextorainfo(int);
 185 struct prefix *find_prefix(struct rainfo *, struct in6_addr *, int);
 186
 187 extern struct in6_addr in6a_site_allrouters;