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/* $OpenBSD: rtadvd.h,v 1.24 2016/03/01 12:51:34 jca Exp $ */
/* $KAME: rtadvd.h,v 1.20 2002/05/29 10:13:10 itojun 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 RTADVD_USER "_rtadvd"
#define ALLNODES "ff02::1"
#define ALLROUTERS_LINK "ff02::2"
/* 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 */
#define MAXROUTERLIFETIME 9000
#define MIN_MAXINTERVAL 4.0
#define MAX_MAXINTERVAL 1800
#define MIN_MININTERVAL 3.0
#define MAXREACHABLETIME 3600000
#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 {
TAILQ_ENTRY(prefix) entry;
u_int32_t validlifetime; /* AdvValidLifetime */
time_t vltimeexpire; /* expiration of vltime; decrement case only */
u_int32_t preflifetime; /* AdvPreferredLifetime */
time_t pltimeexpire; /* expiration of pltime; decrement case only */
u_int onlinkflg; /* bool: AdvOnLinkFlag */
u_int autoconfflg; /* bool: AdvAutonomousFlag */
int prefixlen;
int origin; /* from kernel or config */
struct in6_addr prefix;
};
struct rtinfo {
TAILQ_ENTRY(rtinfo) entry;
uint32_t lifetime;
int rtpref;
int prefixlen;
struct in6_addr prefix;
};
/*
* `struct rdnss` may contain an arbitrary number of `servers` and `struct
* dnssldom` will contain a variable-sized `domain`. Space required for these
* elements will be dynamically allocated. We do not use flexible array members
* here because this breaks compile on some architectures using gcc2. Instead,
* we just have an array with a single (unused) element.
*/
struct rdnss {
TAILQ_ENTRY(rdnss) entry;
u_int32_t lifetime;
int servercnt;
struct in6_addr servers[1];
};
struct dnssldom {
TAILQ_ENTRY(dnssldom) entry;
u_int32_t length;
char domain[1];
};
struct dnssl {
TAILQ_ENTRY(dnssl) entry;
u_int32_t lifetime;
TAILQ_HEAD(dnssldomlist, dnssldom) dnssldoms;
};
struct rainfo {
/* pointer for list */
SLIST_ENTRY(rainfo) entry;
/* 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[IF_NAMESIZE];
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 */
int rtpref; /* router preference */
u_int32_t linkmtu; /* AdvLinkMTU */
u_int32_t reachabletime; /* AdvReachableTime */
u_int32_t retranstimer; /* AdvRetransTimer */
u_int hoplimit; /* AdvCurHopLimit */
TAILQ_HEAD(prefixlist, prefix) prefixes; /* AdvPrefixList(link head) */
int pfxs; /* number of prefixes */
TAILQ_HEAD(rtinfolist, rtinfo) rtinfos;
TAILQ_HEAD(rdnsslist, rdnss) rdnsss; /* advertised recursive dns servers */
TAILQ_HEAD(dnssllist, dnssl) dnssls;
long clockskew; /* used for consistency check of lifetimes */
/* 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 */
};
SLIST_HEAD(ralist, rainfo);
void ra_timeout(void *);
void ra_timer_update(void *, struct timeval *);
struct rainfo *if_indextorainfo(int);
struct prefix *find_prefix(struct rainfo *, struct in6_addr *, int);
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