[Qemu-devel] Re: [PATCH] slirp: Read host DNS config on demand

[Jan Kiszka]

Ed Swierk wrote:
> Currently the qemu user-mode networking stack reads the host DNS
> configuration (/etc/resolv.conf or the Windows equivalent) only once
> when qemu starts.  This causes name lookups in the guest to fail if the
> host is moved to a different network from which the original DNS servers
> are unreachable, a common occurrence when the host is a laptop.
> 
> This patch changes the slirp code to read the host DNS configuration on
> demand, caching the results for 10 seconds to avoid unnecessary overhead
> if name lookups occur in rapid succession.

Nice. I noticed this, too, and shortly thought about some possible
fixes. Don't know why I dropped it again. Anyway, your approach looks
straightforward. Please rebase over git head, and I will happily test
and ack it!

Thanks,
Jan

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