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authorStefano Brivio <sbrivio@redhat.com>2024-08-15 00:20:00 +0200
committerStefano Brivio <sbrivio@redhat.com>2024-08-18 01:29:38 +0200
commit74e508cf797e4fdd812fed3b1b1439a6fc00ebfd (patch)
tree7426d830e291e6cfbb831e01b59703140b658986 /test/pasta/udp
parent0c74068f5643b87db779bb92c73679b257e03a9c (diff)
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netlink, pasta: Disable DAD for link-local addresses on namespace interface
It makes no sense for a container or a guest to try and perform duplicate address detection for their link-local address, as we'll anyway not relay neighbour solicitations with an unspecified source address. While they perform duplicate address detection, the link-local address is not usable, which prevents us from bringing up especially containers and communicate with them right away via IPv6. This is not enough to prevent DAD and reach the container right away: we'll need a couple more patches. As we send NLM_F_REPLACE requests right away, while we still have to read out other addresses on the same socket, we can't use nl_do(): keep track of the last sequence we sent (last address we changed), and deal with the answers to those NLM_F_REPLACE requests in a separate loop, later. Link: https://github.com/containers/podman/pull/23561#discussion_r1711639663 Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
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