[lwip-users] [lwip] tcp_output() and driver errors

[Holger Fried]

Hi,

I have one questions:

Is it right, that if my ethernet driver returns an error after a write() 
call, for example its sendqueue is full, the tcp-layer will recognize this 
first, when a ACK_TIME_OUT occurs? Shouldn't the stack instead keep the 
data in the unsent-queue return the error to the application and wait until 
the driver has enough  space for the packet? Or even better the driver 
calls tcp_output after each TX Confirmation.    
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