From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: Piggyback the final ACK of the three way TCP connection
 establishment with the data
Date: Thu, 22 Mar 2012 16:17:03 -0700
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On Thu, 2012-03-22 at 16:13 -0700, Eric Dumazet wrote:

> A third possibility (reading the code) if you use non blocking IO, is to
> send() a message right after connect()
> 
> 

Or use the auto connect on sendto() more probably...

That combines the connect() and send()