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rtadvd.h revision 1.1 
      1 /*
      2  * Copyright (C) 1998 WIDE Project.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. Neither the name of the project nor the names of its contributors
     14  *    may be used to endorse or promote products derived from this software
     15  *    without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  * SUCH DAMAGE.
     28  */
     29 
     30 #define ALLNODES "ff02::1"
     31 #define ALLROUTERS "ff02::2"
     32 #define ANY "::"
     33 #define RTSOLLEN 8
     34 
     35 /* protocol constants and default values */
     36 #define DEF_MAXRTRADVINTERVAL 600
     37 #define DEF_ADVLINKMTU 0
     38 #define DEF_ADVREACHABLETIME 0
     39 #define DEF_ADVRETRANSTIMER 0
     40 #define DEF_ADVCURHOPLIMIT 64
     41 #define DEF_ADVVALIDLIFETIME 2592000
     42 #define DEF_ADVPREFERREDLIFETIME 604800
     43 
     44 #define MAXROUTERLIFETIME 9000
     45 #define MIN_MAXINTERVAL 4
     46 #define MAX_MAXINTERVAL 1800
     47 #define MIN_MININTERVAL 3
     48 #define MAXREACHABLETIME 3600000
     49 
     50 #define MAX_INITIAL_RTR_ADVERT_INTERVAL  16
     51 #define MAX_INITIAL_RTR_ADVERTISEMENTS    3
     52 #define MAX_FINAL_RTR_ADVERTISEMENTS      3
     53 #define MIN_DELAY_BETWEEN_RAS             3
     54 #define MAX_RA_DELAY_TIME                 500000 /* usec */
     55 
     56 struct prefix {
     57 	struct prefix *next;	/* forward link */
     58 	struct prefix *prev;	/* previous link */
     59 
     60 	u_int32_t validlifetime; /* AdvValidLifetime */
     61 	u_int32_t preflifetime;	/* AdvPreferredLifetime */
     62 	u_int onlinkflg;	/* bool: AdvOnLinkFlag */
     63 	u_int autoconfflg;	/* bool: AdvAutonomousFlag */
     64 	int	prefixlen;
     65 	struct in6_addr prefix;
     66 };
     67 
     68 struct	rainfo {
     69 	/* pointer for list */
     70 	struct	rainfo *next;
     71 
     72 	/* timer related parameters */
     73 	struct rtadvd_timer *timer;
     74 	int initcounter; /* counter for the first few advertisements */
     75 	struct timeval lastsent; /* timestamp when the lates RA was sent */
     76 	int waiting;		/* number of RS waiting for RA */
     77 
     78 	/* interface information */
     79 	int	ifindex;
     80 	int	advlinkopt;	/* bool: whether include link-layer addr opt */
     81 	struct sockaddr_dl *sdl;
     82 	char	ifname[16];
     83 	int	phymtu;		/* mtu of the physical interface */
     84 
     85 	/* Router configuration variables */
     86 	u_short lifetime;	/* AdvDefaultLifetime */
     87 	u_int	maxinterval;	/* MaxRtrAdvInterval */
     88 	u_int	mininterval;	/* MinRtrAdvInterval */
     89 	int 	managedflg;	/* AdvManagedFlag */
     90 	int	otherflg;	/* AdvOtherConfigFlag */
     91 	u_int32_t linkmtu;	/* AdvLinkMTU */
     92 	u_int32_t reachabletime; /* AdvReachableTime */
     93 	u_int32_t retranstimer;	/* AdvRetransTimer */
     94 	u_int	hoplimit;	/* AdvCurHopLimit */
     95 	struct prefix prefix;	/* AdvPrefixList(link head) */
     96 	int	pfxs;		/* number of prefixes */
     97 
     98 	/* actual RA packet data and its length */
     99 	size_t ra_datalen;
    100 	u_char *ra_data;
    101 };
    102 
    103 void ra_timeout __P((void *));
    104 void ra_timer_update __P((void *, struct timeval *));
    105