RFR(s): 8228580: DnsClient TCP socket timeout

Florian Weimer fweimer at redhat.com
Wed Sep 4 18:32:55 UTC 2019

* Pavel Rappo:

>> On 4 Sep 2019, at 18:54, Florian Weimer <fweimer at redhat.com> wrote:
>> You should use a larger timeout than the initial UDP timeout,
>> though.
> Could you elaborate on that?

If you use the initial UDP timeout (one second, I think), the kernel
will not complete the TCP handshake if the initial SYN segment is lost
because the retransmit delay during the handshake is longer than that.


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