diff options
| author | Erik Nordmark <nordmark@arista.com> | 2016-12-03 20:57:09 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-12-05 14:52:05 -0500 |
| commit | 96d5822c1d812ed30da035795a4408f43fe533f3 (patch) | |
| tree | 16ef76dfd501f82c59242dde32193fd9f02113e7 /net/ipv6 | |
| parent | 3c839744b33782b930c5c61df35511ede5e5a574 (diff) | |
ipv6: Allow IPv4-mapped address as next-hop
Made kernel accept IPv6 routes with IPv4-mapped address as next-hop.
It is possible to configure IP interfaces with IPv4-mapped addresses, and
one can add IPv6 routes for IPv4-mapped destinations/prefixes, yet prior
to this fix the kernel returned an EINVAL when attempting to add an IPv6
route with an IPv4-mapped address as a nexthop/gateway.
RFC 4798 (a proposed standard RFC) uses IPv4-mapped addresses as nexthops,
thus in order to support that type of address configuration the kernel
needs to allow IPv4-mapped addresses as nexthops.
Signed-off-by: Erik Nordmark <nordmark@arista.com>
Signed-off-by: Bob Gilligan <gilligan@arista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/route.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index aac7818e2e0f..2413a0637d99 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -2000,8 +2000,11 @@ static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg) It is very good, but in some (rare!) circumstances (SIT, PtP, NBMA NOARP links) it is handy to allow some exceptions. --ANK + We allow IPv4-mapped nexthops to support RFC4798-type + addressing */ - if (!(gwa_type & IPV6_ADDR_UNICAST)) + if (!(gwa_type & (IPV6_ADDR_UNICAST | + IPV6_ADDR_MAPPED))) goto out; if (cfg->fc_table) { |