https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7554
Summary: Add ability to add/remove packet comments using
editcap
Product: Wireshark
Version: SVN
Platform: x86
OS/Version: All
Status: NEW
Severity: Enhancement
Priority: Low
Component: Extras
AssignedTo: bugzilla-admin@xxxxxxxxxxxxx
ReportedBy: niels@xxxxxxxxxx
Build Information:
wireshark 1.9.0 (SVN Rev 44155 from /trunk)
Copyright 1998-2012 Gerald Combs <gerald@xxxxxxxxxxxxx> and contributors.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Compiled (64-bit) with GTK+ 2.24.10, with Cairo 1.10.2, with Pango 1.30.0, with
GLib 2.32.3, with libpcap, with libz 1.2.3.4, without POSIX capabilities,
without libnl, with SMI 0.4.8, with c-ares 1.7.5, with Lua 5.2, without Python,
with GnuTLS 2.12.14, with Gcrypt 1.5.0, with MIT Kerberos, with GeoIP, with
PortAudio <= V18, with AirPcap.
Running on Linux 3.2.0-27-generic, with locale en_US.UTF-8, with libpcap
version
1.1.1, with libz 1.2.3.4, GnuTLS 2.12.14, Gcrypt 1.5.0, without AirPcap.
Built using gcc 4.6.3.
--
Capture file formats such as pcapng allow annotating a capture file with
comments. The ability to modify the comments of a capture file from the
command-line is a useful feature. This patch adds a new editcap switch '-k'
which allows modifying the packet comments of a capture file. Below is the
usage() information for the new switch:
modify the packet comment of a given packet. Use format
"<packet#>:<cmt>" to add comment "<cmt>" to packet
number "<packet#>" and format "<packet#>:" to remove any comment
from packet number "<packet#>". If <comment_format> is in the
form "@FILE", read comment formats, one per line, from FILE. This
option may be specified multiple times. NOTE: Not all output file
types support packet comments.
For example, if input capture 'in.cap' contains 10 packets and one wishes to
add the comment "This is a comment" to packet 3, one would run:
editcap -F pcagng -k "3:This is a comment" in.cap out.cap 1-10
Or to remove any comment from packet 3:
editcap -F pcagng -k "3:" in.cap out.cap 1-10
If one wishes to add a large number of comments to a capture file, one might
tell editcap to read comments from file 'cmts' using the @FILE format:
editcap -F pcapng -k @cmts in.cap out.cap 1-10
where the file 'cmts' could look something like:
------------------------------------Cut
here------------------------------------
3:This is a comment
2:This is also a comment
5:
7:One more comment
------------------------------------Cut
here------------------------------------
Feedback on the patch would be great, below is a list of things I'd like to
hear back about:
o The output file has to support packet comments for this to be useful. Should
an error/warning be printed if the select output file type doesn't support
packet comments?
o Currently, the patch limits the maximum number of comments to 512, following
the limit on packet range specifiers in editcap.
o When reading comment formats from a file, a buffer of 1024 characters is
allocated, limiting the longest comment string.
o Comment formats read from a file are delimited by newlines, meaning each
comment must be on a single line.
o There may be other formats that would work better than the "<packet#>:<cmt>"
comment format used in my patch.
Again, comments or suggestions would be welcome!
--
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