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| author | Duan Jiong <duanj.fnst@cn.fujitsu.com> | 2014-05-15 11:56:14 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-05-16 07:26:27 +0400 |
| commit | be7a010d6fa33dca9327ad8e91844278dfd1e712 (patch) | |
| tree | 887779b523c3a19a0e7965b5bd6f29fd51ad809e /include/net/ip6_route.h | |
| parent | f895f0cfbb77ff432bb6ae4df27b608adbe6573f (diff) | |
| download | linux-be7a010d6fa33dca9327ad8e91844278dfd1e712.tar.xz | |
ipv6: update Destination Cache entries when gateway turn into host
RFC 4861 states in 7.2.5:
The IsRouter flag in the cache entry MUST be set based on the
Router flag in the received advertisement. In those cases
where the IsRouter flag changes from TRUE to FALSE as a result
of this update, the node MUST remove that router from the
Default Router List and update the Destination Cache entries
for all destinations using that neighbor as a router as
specified in Section 7.3.3. This is needed to detect when a
node that is used as a router stops forwarding packets due to
being configured as a host.
Currently, when dealing with NA Message which IsRouter flag changes from
TRUE to FALSE, the kernel only removes router from the Default Router List,
and don't update the Destination Cache entries.
Now in order to update those Destination Cache entries, i introduce
function rt6_clean_tohost().
Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/ip6_route.h')
| -rw-r--r-- | include/net/ip6_route.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h index 6c4f5eac98e7..216cecce65e9 100644 --- a/include/net/ip6_route.h +++ b/include/net/ip6_route.h @@ -127,6 +127,7 @@ int rt6_dump_route(struct rt6_info *rt, void *p_arg); void rt6_ifdown(struct net *net, struct net_device *dev); void rt6_mtu_change(struct net_device *dev, unsigned int mtu); void rt6_remove_prefsrc(struct inet6_ifaddr *ifp); +void rt6_clean_tohost(struct net *net, struct in6_addr *gateway); /* |