[lwip-devel] [bug #29361] ip_frag has problems with zero-copy DMA MACs

[Simon Goldschmidt]

Update of bug #29361 (project lwip):

                  Status:                    None => In Progress            
             Assigned to:                    None => goldsimon              
         Planned Release:                         => 1.4.0                  

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Follow-up Comment #2:

I think this has to be solved for 1.4.0 since it might involve API changes.

I'd fix this by adding flag to pbufs which indicates that there's a
function-pointer for freeing right after the pbuf. We can then use a PBUF_ROM
for sending, allocated in a special pool the items of which are big enough to
store a PBUF_ROM, a function pointer and a pointer to the original pbuf. Then,
every fragment can increase the original pbuf's ref-counter when allocated and
decrease it when sent.

I'll prepare a patch for that.

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Reply to this item at:

  <http://savannah.nongnu.org/bugs/?29361>

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