Re: [lwip-users] Intention of poll, tcp_output() in tcp_slowtmr()call.

[Robert]

On Wed, 3 Mar 2004, David Aldrich wrote:
> I found a thread called "Intention of poll,tcp_output() in
> tcp_slowtmr()call." started in January 2003 by Michael Portmann that
> describes a problem I have stumbled across.  Here is the original
> message:

David, in my case, I am using the "raw" interface, the one with callbacks.  
Sounds like you are doing that as well.  My application creates output in 
the form of "messages", and sends them with tcp_write() once they are 
ready to transmit. It was my assumption that the reason output is not sent 
immediately based on a call to tcp_write() is because it may be that two 
or more packets could be combined, and therefore sent more efficiently.  

This strategy makes sense for an application like ftpd, or even httpd, 
where traffic is not very interactive, but works poorly for something like 
telnetd.  

My solution was to call tcp_output() directly for each call to tcp_write() 
unless the call to tcp_write returned an error.


-- 
Best Regards,
Robert 

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