[REBOL] possible rebol tcp open bug ...
From: petr:krenzelok:trz:cz at: 10-Aug-2002 19:14
Hi,
last two weeks we were testing our first boards of our device, which has
limited, but functional ethernet + tcp stack. We've fixed several bugs,
but found possible Rebol bug, or at least strange behavior.
The problem was, that using following loop, rebol escaped from loop, TCP
window in ACK packet dropped to 0, and RST packet was generated by
'close command, which is probably OK for Win98 and half-closed
connection ....
However:
device: open/direct/no-wait tcp?//ip-addr:55
while [wait device data: copy device][append result data]
using above code, we watched Ethereal, and we catched just several
packets and the loop breaked - so - 'none condition would have to be met
with 'copy, but in async mode it should be possible only if other side
closes the connection, which was NOT the case with our device.
the proof our device works correctly could be seen watching Ethereal
packet info, follow TCP guide book, and another aproach taken with rebol:
device: open/direct ....
forever [wait device res: read-io buff buff-size][....... clear buff]
I don't have exact source here, but simply put - 'read-io worked
flawlessly (except that it SHOULD be mentioned in docs, that if we don't
clear buffer, it will not work too)
Today I remembered earlier Chris' email, here it is:
----------------
[1] Skip on file ports opened with
open/binary/direct
like in:
fp: open/binary/direct %file
skip fp 100
is _still_ buggy with current /View beta (I better don't mention when
this bug has first appeared on the list and presumably been sent to
feedback ;-)
File ports opened without the /binary refinment work.
[2] /skip refinement ignored when used in following scenario:
read/direct/skip/part %file 100 100
PLEASE FIX, those are very important.
------------------
so I tried to open our device using open/binary/direct/no-wait ... and - it suddenly
works, in opposite to open/direct/no-wait
So - is there anything wrong with order of refinements applied to 'open, or with combination
of refinements used? I am just curious, if I discovered a bug, or just should I always
better use /binary when I use /direct/no-wait too?
PS: posted to feedback ...
Cheers,
-pekr-
