Re: [Boost-users] [asio]Does the function of async_read can find the tcp connection has closed?

Subject: Re: [Boost-users] [asio]Does the function of async_read can find the tcp connection has closed?
From: lx (lxlenovostar_at_[hidden])
Date: 2014-04-18 03:45:47

hi all:

2014-04-15 15:37 GMT+08:00 Gavin Lambert <gavinl_at_[hidden]>:

> On 15/04/2014 16:04, quoth lx:
>
>        I want to know async_read or async_write can detect the tcp
>> connection has closed, or not?
>>
>
> Try it and see.
>
> Generally you should get an error callback for write if the connection has
> closed.  You may or may not get one for read, depending on how the
> connection was closed.  (Graceful shutdown or local connections typically
> will, unexpected remote disconnection typically won't.)
>
> This is not unique to ASIO; it's how pretty much all TCP sockets work.
>
>
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