Re: [Boost-users] [asio] Socket closed notification?

Subject: Re: [Boost-users] [asio] Socket closed notification?
From: Scott Gifford (sgifford_at_[hidden])
Date: 2009-12-14 22:50:41

Jonathan Franklin <franklin.jonathan_at_[hidden]> writes:

> On Mon, Dec 14, 2009 at 10:52 AM, Nicola Michael Gutberlet
> <nicola.gutberlet_at_[hidden]> wrote:
>> I’m using TCP sockets and wonder, if there’s a possibility to get an
>> automatic notification when one side of a socket is closed (even if the
>> other side is crashed / not closed properly).
>
> You generally have to do a read on the socket to reliably detect when
> the other side has closed (or crashed).

And a write, too, or else use TCP keepalives.  Otherwise a crashed
client which is never sending anything will not send any error
indication for you to read.

----Scott.