[RTEMS Project] #4494: pppd broken if serial driver can't handle big data

RTEMS trac trac at rtems.org
Thu Aug 12 09:26:09 UTC 2021


#4494: pppd broken if serial driver can't handle big data
---------------------------------+--------------------
  Reporter:  Christian Mauderer  |      Owner:  (none)
      Type:  defect              |     Status:  new
  Priority:  normal              |  Milestone:
 Component:  network/libbsd      |    Version:  5
  Severity:  normal              |   Keywords:
Blocked By:                      |   Blocking:
---------------------------------+--------------------
 Cloned from #4493:
 ----
 The current implementation of ppp assumes (in ppp_tty.c:pppstart) that
 sending characters via the termios device write function will send buffers
 of any length. That is not true for most drivers.

 Devices that can only send one character at a time won't work with that at
 all. Devices that have a big enough FIFO might work most of the time.
 Devices that use a DMA for transmitting might work without problems.

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Ticket URL: <http://devel.rtems.org/ticket/4494>
RTEMS Project <http://www.rtems.org/>
RTEMS Project


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