Wireshark-bugs: [Wireshark-bugs] [Bug 1814] Capture filters not work when capturing from named pipes.

From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Sun, 2 Sep 2007 19:11:58 +0000 (GMT)

http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=1814


guy@xxxxxxxxxxxx changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         OS/Version|Windows XP                  |All
           Platform|PC                          |All




------- Comment #1 from guy@xxxxxxxxxxxx  2007-09-02 19:11 GMT -------
This isn't unique to Windows.

I assume the theory was that the program writing to the pipe should be doing
the filtering; that means you don't have to push uninteresting packets through
the pipe (pushing them through the pipe is a waste of CPU and memory bandwidth,
at minimum, and if the program writing to the pipe is receiving the packets
from over a network - e.g., a tcpdump/WinDump run on a remote machine via ssh -
it also wastes network bandwidth; in addition, it increases the risk of packet
loss).

If it's impossible to do the filtering in the program writing to the pipe, we
could have the capture loop run bpf_filter() on the incoming packets when
reading from a pipe.


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