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[IPV6]: ROUTE: Set appropriate information before inserting a route.

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Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki 2006-03-20 16:56:32 -08:00 • committed by David S. Miller
parent 95a9a5ba02
commit a1e783634a
1 changed files with 18 additions and 15 deletions
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33
net/ipv6/route.c
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@ -1221,21 +1221,24 @@ void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr,
2. It is gatewayed route or NONEXTHOP route. Action: clone it. 2. It is gatewayed route or NONEXTHOP route. Action: clone it.
*/ */
if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) { if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) {
nrt = rt6_cow(rt, daddr, saddr, NULL); nrt = rt6_alloc_cow(rt, daddr, saddr);
if (!nrt->u.dst.error) { if (!nrt)
nrt->u.dst.metrics[RTAX_MTU-1] = pmtu; goto out;
if (allfrag)
nrt->u.dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG; nrt->u.dst.metrics[RTAX_MTU-1] = pmtu;
/* According to RFC 1981, detecting PMTU increase shouldn't be if (allfrag)
happened within 5 mins, the recommended timer is 10 mins. nrt->u.dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG;
Here this route expiration time is set to ip6_rt_mtu_expires
which is 10 mins. After 10 mins the decreased pmtu is expired /* According to RFC 1981, detecting PMTU increase shouldn't be
and detecting PMTU increase will be automatically happened. * happened within 5 mins, the recommended timer is 10 mins.
*/ * Here this route expiration time is set to ip6_rt_mtu_expires
dst_set_expires(&nrt->u.dst, ip6_rt_mtu_expires); * which is 10 mins. After 10 mins the decreased pmtu is expired
nrt->rt6i_flags |= RTF_DYNAMIC|RTF_EXPIRES; * and detecting PMTU increase will be automatically happened.
} */
dst_release(&nrt->u.dst); dst_set_expires(&nrt->u.dst, ip6_rt_mtu_expires);
nrt->rt6i_flags |= RTF_DYNAMIC|RTF_EXPIRES;
ip6_ins_rt(nrt, NULL, NULL, NULL);
} else { } else {
nrt = ip6_rt_copy(rt); nrt = ip6_rt_copy(rt);
if (nrt == NULL) if (nrt == NULL)