diff options
| 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 | |
| parent | 1e6a4bc874db9489146edb78aea281f1cfafcee0 (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')
| -rw-r--r-- | net/ipv6/addrconf.c | 1 | ||||
| -rw-r--r-- | net/ipv6/ip6_input.c | 3 | ||||
| -rw-r--r-- | net/ipv6/route.c | 3 |
3 files changed, 5 insertions, 2 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index d4733160e6b7..bfe3ec7ecb14 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -997,6 +997,7 @@ ipv6_add_addr(struct inet6_dev *idev, struct ifa6_config *cfg, if (addr_type == IPV6_ADDR_ANY || addr_type & IPV6_ADDR_MULTICAST || (!(idev->dev->flags & IFF_LOOPBACK) && + !netif_is_l3_master(idev->dev) && addr_type & IPV6_ADDR_LOOPBACK)) return ERR_PTR(-EADDRNOTAVAIL); 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 diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 21a919e74fbf..938db8ae2316 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -2071,7 +2071,8 @@ struct dst_entry *ip6_route_output_flags(struct net *net, const struct sock *sk, { bool any_src; - if (rt6_need_strict(&fl6->daddr)) { + if (ipv6_addr_type(&fl6->daddr) & + (IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL)) { struct dst_entry *dst; dst = l3mdev_link_scope_lookup(net, fl6); |