[RTEMS Project] #4493: pppd broken if serial driver can't handle big data

[RTEMS trac]

#4493: pppd broken if serial driver can't handle big data
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  Reporter:  Christian Mauderer  |      Owner:  Christian Mauderer
      Type:  defect              |     Status:  assigned
  Priority:  normal              |  Milestone:
 Component:  network/libbsd      |    Version:  6
  Severity:  normal              |   Keywords:
Blocked By:                      |   Blocking:
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 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/4493>
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