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Fix spurious warnings from neighbor discovery when working with IPv6 over

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point to point tunnels (gif).

PR:		93220
Submitted by:	Jinmei Tatuya
MFC after:	1 week
This commit is contained in:
George V. Neville-Neil 2006-06-08 00:31:17 +00:00
parent 2d0105632f
commit a59af512d4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=159390
2 changed files with 53 additions and 8 deletions
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48
sys/netinet6/in6.c
View File

@ -1720,20 +1720,55 @@ in6_ifinit(ifp, ia, sin6, newhost)
/* we could do in(6)_socktrim here, but just omit it at this moment. */
if (newhost && nd6_need_cache(ifp) != 0) {
/* set the rtrequest function to create llinfo */
ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
}
/*
* Special case:
* If a new destination address is specified for a point-to-point
* interface, install a route to the destination as an interface
* direct route.
* direct route. In addition, if the link is expected to have neighbor
* cache entries, specify RTF_LLINFO so that a cache entry for the
* destination address will be created.
* created
* XXX: the logic below rejects assigning multiple addresses on a p2p
* interface that share a same destination.
* interface that share the same destination.
*/
plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
ia->ia_dstaddr.sin6_family == AF_INET6) {
if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD,
RTF_UP | RTF_HOST)) != 0)
int rtflags = RTF_UP | RTF_HOST;
struct rtentry *rt = NULL, **rtp = NULL;
if (nd6_need_cache(ifp) != 0) {
rtflags |= RTF_LLINFO;
rtp = &rt;
}
error = rtrequest(RTM_ADD, (struct sockaddr *)&ia->ia_dstaddr,
(struct sockaddr *)&ia->ia_addr,
(struct sockaddr *)&ia->ia_prefixmask,
ia->ia_flags | rtflags, rtp);
if (error != 0)
return (error);
if (rt != NULL) {
struct llinfo_nd6 *ln;
RT_LOCK(rt);
ln = (struct llinfo_nd6 *)rt->rt_llinfo;
if (ln != NULL) {
/*
* Set the state to STALE because we don't
* have to perform address resolution on this
* link.
*/
ln->ln_state = ND6_LLINFO_STALE;
}
RT_REMREF(rt);
RT_UNLOCK(rt);
}
ia->ia_flags |= IFA_ROUTE;
}
if (plen < 128) {
@ -1744,11 +1779,8 @@ in6_ifinit(ifp, ia, sin6, newhost)
}
/* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */
if (newhost) {
/* set the rtrequest function to create llinfo */
ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
if (newhost)
in6_ifaddloop(&(ia->ia_ifa));
}
return (error);
}

13
sys/netinet6/nd6.c
View File

@ -512,6 +512,19 @@ nd6_llinfo_timer(arg)
ln->ln_asked++;
nd6_llinfo_settimer(ln, (long)ndi->retrans * hz / 1000);
nd6_ns_output(ifp, dst, dst, ln, 0);
} else if (rt->rt_ifa != NULL &&
rt->rt_ifa->ifa_addr->sa_family == AF_INET6 &&
(((struct in6_ifaddr *)rt->rt_ifa)->ia_flags & IFA_ROUTE)) {
/*
* This is an unreachable neighbor whose address is
* specified as the destination of a p2p interface
* (see in6_ifinit()). We should not free the entry
* since this is sort of a "static" entry generated
* via interface address configuration.
*/
ln->ln_asked = 0;
ln->ln_expire = 0; /* make it permanent */
ln->ln_state = ND6_LLINFO_STALE;
} else {
(void)nd6_free(rt, 0);
ln = NULL;