[lwip-users] What is the behavior of the tcp_sent callback?

[Bill Auerbach]

Hello,

 

I’m using tcp_write( ptr, 20, 0 ); having used tcp_sent right before this call.  I expected the sent callback, which I would detect I have nothing left to sent and can thus free the data at ptr.  The sent callback doesn’t occur.  Is this normal behavior – that the callback only is used when tcp_write is called with tcp_sndbuf amount of data?

 

Thanks,

 

Bill Auerbach