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| author | Robert Shearman <rshearma@vyatta.att-mail.com> | 2018-09-19 13:56:53 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-09-19 21:23:01 -0700 |
| commit | 3ede0bbcdfc94ccdbe56bed4e66beb3f4f4f6b00 (patch) | |
| tree | e69ccbacf5b23bbe283999f823fbbd344857ac45 /net/ipv6/ip6_input.c | |
| parent | 1e6a4bc874db9489146edb78aea281f1cfafcee0 (diff) | |
| download | lwn-3ede0bbcdfc94ccdbe56bed4e66beb3f4f4f6b00.tar.gz lwn-3ede0bbcdfc94ccdbe56bed4e66beb3f4f4f6b00.zip | |
ipv6: Allow the l3mdev to be a loopback
There is no way currently for an IPv6 client connect using a loopback
address in a VRF, whereas for IPv4 the loopback address can be added:
$ sudo ip addr add dev vrfred 127.0.0.1/8
$ sudo ip -6 addr add ::1/128 dev vrfred
RTNETLINK answers: Cannot assign requested address
So allow ::1 to be configured on an L3 master device. In order for
this to be usable ip_route_output_flags needs to not consider ::1 to
be a link scope address (since oif == l3mdev and so it would be
dropped), and ipv6_rcv needs to consider the l3mdev to be a loopback
device so that it doesn't drop the packets.
Signed-off-by: Robert Shearman <rshearma@vyatta.att-mail.com>
Signed-off-by: Mike Manning <mmanning@vyatta.att-mail.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6_input.c')
| -rw-r--r-- | net/ipv6/ip6_input.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c index 6242682be876..96577e742afd 100644 --- a/net/ipv6/ip6_input.c +++ b/net/ipv6/ip6_input.c @@ -178,7 +178,8 @@ static struct sk_buff *ip6_rcv_core(struct sk_buff *skb, struct net_device *dev, */ if ((ipv6_addr_loopback(&hdr->saddr) || ipv6_addr_loopback(&hdr->daddr)) && - !(dev->flags & IFF_LOOPBACK)) + !(dev->flags & IFF_LOOPBACK) && + !netif_is_l3_master(dev)) goto err; /* RFC4291 Errata ID: 3480 |