freebsd-src/usr.sbin/rtadvd/rtadvd.h
Hajimu UMEMOTO 0a5f3ef410 Changed the behavior when an interface-direct prefix being advertised
was removed from the kernel;
Advertise the prefix with zero lifetimes rather than to remove the prefix
from the prefix list to be advertised.
This will help renumber a receiving host by deprecating the address
derived from the old prefix.

Obtained from:	KAME
MFC after:	2 weeks
2002-06-13 16:59:31 +00:00

179 lines
5.8 KiB
C

/* $FreeBSD$ */
/* $KAME: rtadvd.h,v 1.16 2001/04/10 15:08:31 suz Exp $ */
/*
* Copyright (C) 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#define ALLNODES "ff02::1"
#define ALLROUTERS_LINK "ff02::2"
#define ALLROUTERS_SITE "ff05::2"
#define ANY "::"
#define RTSOLLEN 8
/* protocol constants and default values */
#define DEF_MAXRTRADVINTERVAL 600
#define DEF_ADVLINKMTU 0
#define DEF_ADVREACHABLETIME 0
#define DEF_ADVRETRANSTIMER 0
#define DEF_ADVCURHOPLIMIT 64
#define DEF_ADVVALIDLIFETIME 2592000
#define DEF_ADVPREFERREDLIFETIME 604800
/*XXX int-to-double comparison for INTERVAL items */
#ifndef MIP6
#define mobileip6 0
#endif
#define MAXROUTERLIFETIME 9000
#define MIN_MAXINTERVAL (mobileip6 ? 1.5 : 4.0)
#define MAX_MAXINTERVAL 1800
#define MIN_MININTERVAL (mobileip6 ? 0.5 : 3)
#define MAXREACHABLETIME 3600000
#ifndef MIP6
#undef miobileip6
#endif
#define MAX_INITIAL_RTR_ADVERT_INTERVAL 16
#define MAX_INITIAL_RTR_ADVERTISEMENTS 3
#define MAX_FINAL_RTR_ADVERTISEMENTS 3
#define MIN_DELAY_BETWEEN_RAS 3
#define MAX_RA_DELAY_TIME 500000 /* usec */
#define PREFIX_FROM_KERNEL 1
#define PREFIX_FROM_CONFIG 2
#define PREFIX_FROM_DYNAMIC 3
struct prefix {
struct prefix *next; /* forward link */
struct prefix *prev; /* previous link */
struct rainfo *rainfo; /* back pointer to the interface */
struct rtadvd_timer *timer; /* expiration timer. used when a prefix
* derived from the kernel is deleted.
*/
u_int32_t validlifetime; /* AdvValidLifetime */
long vltimeexpire; /* expiration of vltime; decrement case only */
u_int32_t preflifetime; /* AdvPreferredLifetime */
long pltimeexpire; /* expiration of pltime; decrement case only */
u_int onlinkflg; /* bool: AdvOnLinkFlag */
u_int autoconfflg; /* bool: AdvAutonomousFlag */
#ifdef MIP6
u_int routeraddr; /* bool: RouterAddress */
#endif
int prefixlen;
int origin; /* from kernel or cofig */
struct in6_addr prefix;
};
struct rtinfo {
struct rtinfo *prev; /* previous link */
struct rtinfo *next; /* forward link */
u_int32_t ltime; /* route lifetime */
u_int rtpref; /* router preference */
int prefixlen;
struct in6_addr prefix;
};
struct soliciter {
struct soliciter *next;
struct sockaddr_in6 addr;
};
struct rainfo {
/* pointer for list */
struct rainfo *next;
/* timer related parameters */
struct rtadvd_timer *timer;
int initcounter; /* counter for the first few advertisements */
struct timeval lastsent; /* timestamp when the latest RA was sent */
int waiting; /* number of RS waiting for RA */
/* interface information */
int ifindex;
int advlinkopt; /* bool: whether include link-layer addr opt */
struct sockaddr_dl *sdl;
char ifname[16];
int phymtu; /* mtu of the physical interface */
/* Router configuration variables */
u_short lifetime; /* AdvDefaultLifetime */
u_int maxinterval; /* MaxRtrAdvInterval */
u_int mininterval; /* MinRtrAdvInterval */
int managedflg; /* AdvManagedFlag */
int otherflg; /* AdvOtherConfigFlag */
#ifdef MIP6
int haflg; /* HAFlag */
#endif
int rtpref; /* router preference */
u_int32_t linkmtu; /* AdvLinkMTU */
u_int32_t reachabletime; /* AdvReachableTime */
u_int32_t retranstimer; /* AdvRetransTimer */
u_int hoplimit; /* AdvCurHopLimit */
struct prefix prefix; /* AdvPrefixList(link head) */
int pfxs; /* number of prefixes */
long clockskew; /* used for consisitency check of lifetimes */
#ifdef MIP6
u_short hapref; /* Home Agent Preference */
u_short hatime; /* Home Agent Lifetime */
#endif
struct rtinfo route; /* route information option (link head) */
int routes; /* number of route information options */
/* actual RA packet data and its length */
size_t ra_datalen;
u_char *ra_data;
/* statistics */
u_quad_t raoutput; /* number of RAs sent */
u_quad_t rainput; /* number of RAs received */
u_quad_t rainconsistent; /* number of RAs inconsistent with ours */
u_quad_t rsinput; /* number of RSs received */
/* info about soliciter */
struct soliciter *soliciter; /* recent solication source */
};
struct rtadvd_timer *ra_timeout __P((void *));
void ra_timer_update __P((void *, struct timeval *));
int prefix_match __P((struct in6_addr *, int, struct in6_addr *, int));
struct rainfo *if_indextorainfo __P((int));
struct prefix *find_prefix __P((struct rainfo *, struct in6_addr *, int));
extern struct in6_addr in6a_site_allrouters;
#ifdef MIP6
extern int mobileip6;
#endif