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 03:52:06

hi all:
      I try it. The async_read in client can't detect the connection of tcp
close immediately when I kill the process of server, but It can find it
after almost 3 minutes.

2014-04-18 15:45 GMT+08:00 lx <lxlenovostar_at_[hidden]>:

> 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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>
>