Re: [ECOS] Problems when aborting tftp transfers

[Andrew Lunn <andrew at lunn dot ch>]

On Mon, Aug 02, 2004 at 03:45:01PM +0200, ?yvind Harboe wrote:
> On Mon, 2004-08-02 at 15:01, Andrew Lunn wrote:
> > On Wed, Jul 21, 2004 at 12:47:53PM +0200, ?yvind Harboe wrote:
> > > I'm seing problems when aborting tftp transfers:
> > > 
> > > - With CYGSEM_NET_TFTPD_MULTITHREADED == 0, a subsequent tftp transfer
> > > after an aborted tftp transfer can get "stuck" since the main tftp
> > > server loop is receiving stale packets and hence e.g. _write_file() is
> > > invoked for the terminated tftp transfer session(there can be as many as
> > > a dozen outstanding stale packets, hence tftp can take a *really* long
> > > time to return to normal operation). Q: Is
> > > CYGSEM_NET_TFTPD_MULTITHREADED == 0 working as intended for aborted tftp
> > > transfers?
> > > 
> > > - I'm not sure this is a problem or just the way tftp works. When I set
> > > CYGSEM_NET_TFTPD_MULTITHREADED==1, tftp works even if I abort transfers,
> > > but the current tftp transfer session on the eCos end does not return to
> > > the main tftp server loop until the current transfer session has
> > > exhausted its retries. 
> > 
> > I don't follow what you are taking about here. Could you give some
> > more details, describe how you produce the problems, what goes wrong
> > and how you would expect it to act.
> 
> here is what I did:
> 
> - with CYGSEM_NET_TFTPD_MULTITHREADED=0.
> - started a tftp transfer from Windows machine
> - aborted it on the Windows end

Does the M$ end send an error packet to terminate the transfer or
simply stop sending data packets?

> - at this point the tftp server goes back to the main loop and sees
> multiple tftp transfer initiation requests from the aborted transfer
> session. 

Initiation requests? You mean WRQ packets from the tftp client you
have just killed? That would be strange.
        
        Andrew

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