[Bug 930962] Re: dhcp3-server reports many bad udp checksums to syslog using virtio NIC

[Serge Hallyn]

I'd be ok with adding a /usr/share/lxc/hooks/network-bootpc-checksum
script which does the iptables add, and having the debian template add
that to lxc.hook.pre-start.  However, in that hook script we'd want to
avoid having one rule added per container start.  What's the cleanest
and most robust way to detect if the rule has already been inserted?  We
can do a iptables -t mangle -L and look for

CHECKSUM   udp  --  anywhere             anywhere             udp
dpt:bootpc CHECKSUM fill

but that feels fragile.  Any better ideas?

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Title:
  dhcp3-server reports many bad udp checksums to syslog using virtio NIC

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