[lwip-devel] [bug #37614] Errors from ip_output (ipX_output) are not processing

[Oleg Kovalev]

URL:
  <http://savannah.nongnu.org/bugs/?37614>

                 Summary: Errors from ip_output (ipX_output) are not
processing
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: r0pegig
            Submitted on: Пнд 22 Окт 2012 14:50:15
                Category: TCP
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Private
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: CVS Head

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Details:

I have faced with this error when I was making an attempt to transmit a large
buffer through TCP. The Blackfin driver implemented with a fixed number of
output DMA descriptors (and this number is limited in any case). So when we
try to output more data than the driver can process trailing packets will be
lost. Driver returns an error ERR_MEM, ip_output_if_opt returns that error
too, but tcp_output_segment (and other output TCP functions too) does not.
I have made patch for my project but my knowledge of LwIP is not enough for
participating in development so I decide sent this bug report. I hope this
will be helpful.




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