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rtadvd.h revision 1.9 
      1 /*	$NetBSD: rtadvd.h,v 1.9 2002/05/29 14:40:32 itojun Exp $	*/
      2 /*	$KAME: rtadvd.h,v 1.20 2002/05/29 10:13:10 itojun 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 /*XXX int-to-double comparison for INTERVAL items */
     49 #define mobileip6 0
     50 
     51 #define MAXROUTERLIFETIME 9000
     52 #define MIN_MAXINTERVAL (mobileip6 ? 1.5 : 4.0)
     53 #define MAX_MAXINTERVAL 1800
     54 #define MIN_MININTERVAL	(mobileip6 ? 0.05 : 3.0)
     55 #define MAXREACHABLETIME 3600000
     56 
     57 #undef miobileip6
     58 
     59 #define MAX_INITIAL_RTR_ADVERT_INTERVAL  16
     60 #define MAX_INITIAL_RTR_ADVERTISEMENTS    3
     61 #define MAX_FINAL_RTR_ADVERTISEMENTS      3
     62 #define MIN_DELAY_BETWEEN_RAS             3
     63 #define MAX_RA_DELAY_TIME                 500000 /* usec */
     64 
     65 #define PREFIX_FROM_KERNEL 1
     66 #define PREFIX_FROM_CONFIG 2
     67 #define PREFIX_FROM_DYNAMIC 3
     68 
     69 struct prefix {
     70 	struct prefix *next;	/* forward link */
     71 	struct prefix *prev;	/* previous link */
     72 
     73 	u_int32_t validlifetime; /* AdvValidLifetime */
     74 	long	vltimeexpire;	/* expiration of vltime; decrement case only */
     75 	u_int32_t preflifetime;	/* AdvPreferredLifetime */
     76 	long	pltimeexpire;	/* expiration of pltime; decrement case only */
     77 	u_int onlinkflg;	/* bool: AdvOnLinkFlag */
     78 	u_int autoconfflg;	/* bool: AdvAutonomousFlag */
     79 	int prefixlen;
     80 	int origin;		/* from kernel or cofig */
     81 	struct in6_addr prefix;
     82 };
     83 
     84 
     85 struct soliciter {
     86 	struct soliciter *next;
     87 	struct sockaddr_in6 addr;
     88 };
     89 
     90 struct	rainfo {
     91 	/* pointer for list */
     92 	struct	rainfo *next;
     93 
     94 	/* timer related parameters */
     95 	struct rtadvd_timer *timer;
     96 	int initcounter; /* counter for the first few advertisements */
     97 	struct timeval lastsent; /* timestamp when the latest RA was sent */
     98 	int waiting;		/* number of RS waiting for RA */
     99 
    100 	/* interface information */
    101 	int	ifindex;
    102 	int	advlinkopt;	/* bool: whether include link-layer addr opt */
    103 	struct sockaddr_dl *sdl;
    104 	char	ifname[16];
    105 	int	phymtu;		/* mtu of the physical interface */
    106 
    107 	/* Router configuration variables */
    108 	u_short lifetime;	/* AdvDefaultLifetime */
    109 	u_int	maxinterval;	/* MaxRtrAdvInterval */
    110 	u_int	mininterval;	/* MinRtrAdvInterval */
    111 	int 	managedflg;	/* AdvManagedFlag */
    112 	int	otherflg;	/* AdvOtherConfigFlag */
    113 	int	rtpref;		/* router preference */
    114 	u_int32_t linkmtu;	/* AdvLinkMTU */
    115 	u_int32_t reachabletime; /* AdvReachableTime */
    116 	u_int32_t retranstimer;	/* AdvRetransTimer */
    117 	u_int	hoplimit;	/* AdvCurHopLimit */
    118 	struct prefix prefix;	/* AdvPrefixList(link head) */
    119 	int	pfxs;		/* number of prefixes */
    120 	long	clockskew;	/* used for consisitency check of lifetimes */
    121 
    122 
    123 	/* actual RA packet data and its length */
    124 	size_t ra_datalen;
    125 	u_char *ra_data;
    126 
    127 	/* statistics */
    128 	u_quad_t raoutput;	/* number of RAs sent */
    129 	u_quad_t rainput;	/* number of RAs received */
    130 	u_quad_t rainconsistent; /* number of RAs inconsistent with ours */
    131 	u_quad_t rsinput;	/* number of RSs received */
    132 
    133 	/* info about soliciter */
    134 	struct soliciter *soliciter;	/* recent solication source */
    135 };
    136 
    137 void ra_timeout __P((void *));
    138 void ra_timer_update __P((void *, struct timeval *));
    139 
    140 int prefix_match __P((struct in6_addr *, int, struct in6_addr *, int));
    141 struct rainfo *if_indextorainfo __P((int));
    142 struct prefix *find_prefix __P((struct rainfo *, struct in6_addr *, int));
    143 
    144 extern struct in6_addr in6a_site_allrouters;
    145