Wireshark-bugs: [Wireshark-bugs] [Bug 9311] New: Support for writing gzip-compressed files on th
Date: Mon, 21 Oct 2013 10:31:44 +0000
Bug ID 9311
Summary Support for writing gzip-compressed files on the fly?
Classification Unclassified
Product Wireshark
Version unspecified
Hardware All
OS All
Status UNCONFIRMED
Severity Enhancement
Priority Low
Component Capture file support (libwiretap)
Assignee bugzilla-admin@wireshark.org
Reporter lekensteyn@gmail.com

Build Information:

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In order to save disk space, I compress the capture files from dumpcap:

    dumpcap -i <interface> -w - | gzip -9 > some.pcapng.gz

I would like to see dumpcap detecting that a gzipped file is wanted, so I can
run:

    dumpcap -i <interface> -w some.pcapng.gz

In the former case, Ctrl + C may lead to truncated packets because gzip is
killed before dumpcap has written all packets. As a workaround, I wrote a
python script that ignores signals until a read/write error occurs.

This idea can also be extended to tshark:

    tshark -r foo.pcap.gz -Y http -w filtered.pcapng.gz

Perhaps it can also be used for wireshark, this would save some space in
$TMPDIR.

A possible consideration is the event where more packets are being captured
than can be processed while compressing.

I have not yet looked thoroughly at the code, but if the interfaces are not
unified yet, perhaps it is a good time to do so. While working at this, perhaps
other compression formats can be considered too:
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=8563


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