[lwip-devel] [task #7013] Create option to have all packets delivered to netif->output in one piece

[Simon Goldschmidt]

URL:
  <http://savannah.nongnu.org/task/?7013>

                 Summary: Create option to have all packets delivered to
netif->output in one piece
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: goldsimon
            Submitted on: Samstag 16.06.2007 um 13:48
                Category: None
         Should Start On: Samstag 16.06.2007 um 00:00
   Should be Finished on: Samstag 16.06.2007 um 00:00
                Priority: 1 - Later
                  Status: None
                 Privacy: Public
        Percent Complete: 0%
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                  Effort: 0.00

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Details:

Some MACs that have DMA queues don't support creating a packet from 2 or more
different locations in RAM (e.g. pbuf chain).

To avoid having to copy the whole packet into a new one before enqueueing it
to send, it can be better to create the whole packet in one big pbuf (and so
to avoid send-by-reference somtimes).

Place that would need changes include the sending of data over UDP sockets
and the copy flag in tcp_write. (Maybe more?)




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