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authorRobert Shearman <rshearma@vyatta.att-mail.com>2018-09-19 13:56:53 +0100
committerDavid S. Miller <davem@davemloft.net>2018-09-19 21:23:01 -0700
commit3ede0bbcdfc94ccdbe56bed4e66beb3f4f4f6b00 (patch)
treee69ccbacf5b23bbe283999f823fbbd344857ac45 /net/ipv6/ip6_input.c
parent1e6a4bc874db9489146edb78aea281f1cfafcee0 (diff)
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.c3
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