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From: Gavin Lambert (boost_at_[hidden])
Date: 2019-07-03 02:20:57

Mere moments ago, quoth I:
> On 29/06/2019 12:35, JH wrote:
>> As I described in other emails, when one network interface WiFi
>> failed, the network interface Ethernet takes over, the client
>> application using boost ASIO TCP socket cannot detect the broken of
>> WiFi, it continually sent messages to the remote server via the broken
>> WiFi interface without triggering errors but obviously the server
>> could not receive messages any more.
> Receiving on a broken socket reports no errors.  Trying to send on a
> broken socket, however, should normally return an error code.  Are you
> sure you're checking in the right places?

Also note that depending on the type of break, it may take a long time
(>=30 seconds in some cases) to get an error when sending.

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