http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=1703
------- Comment #1 from guy@xxxxxxxxxxxx 2007-09-02 23:03 GMT -------
It's a display filter, not a capture filter, and the idea is that if you want
to apply a display filter to each packet as it's read, and discard packets that
don't match (not "don't display", completely *discard*), you can do it at that
point.
Read filters have some problems (for example, if packet reassembly is being
done, only the frame where the reassembly completes will match the filter, so
most of the fragments will be missing from the packet list), but they can be
useful in some cases.
Perhaps we should make it clearer that it's a read filter.
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