Re: [Boost-users] Linux TCP session stays ESTABLISHED when interface is removed

Subject: Re: [Boost-users] Linux TCP session stays ESTABLISHED when interface is removed
From: Niall Douglas (s_sourceforge_at_[hidden])
Date: 2013-09-25 21:00:36

On 25 Sep 2013 at 17:21, Chris Verges wrote:

> Do you happen to know if writing a zero-length message would be enough
> to trigger the socket layers to reset without forcing data across the
> physical layer?  (I'm in the middle of coding it up as a test, but
> figured I'd ask just in case you happened to know.)

Much better to turn on TCP keepalive (it's one of the socket 
options). Then you'll learn when the transport has gone away.

Niall
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