Wireshark-bugs: [Wireshark-bugs] [Bug 6293] HDFS dissector enhancement
Date: Thu, 1 Sep 2011 23:34:15 -0700 (PDT)

--- Comment #5 from Guy Harris <[email protected]> 2011-09-01 23:34:14 PDT ---
That's not at all correctly handling TCP segmentation.  The length of the
tvbuff handed to the routine calling tcp_dissect_pdus() does not, in any way
whatsoever, reflect the lengths of any packets contained, in whole or in part,
in the tvbuff; tcp_dissect_pdus() can *ONLY* be used in protocols where all
packets are at least N bytes long, for some value of N, and the contents of the
first N bytes can be used, in *ALL* cases, to determine the length of the

Unfortunately, not having a protocol specification for the HDFS wire protocol,
I don't know whether that's the case.  This HDFS issue:


is still unresolved, so there doesn't seem to be a complete protocol
specification, unless this is some other protocol, as per the over-a-year-ago

    Todd Lipcon added a comment - 30/Apr/10 05:08
    I agree that we should do a better job of documenting the current protocol,
but we shouldn't spend too much time on it, since everyone is in agreement that
we'd like to move to Avro this year. A quick pass to update the comments is
probably worth doing, but a formal spec may be overkill for a protocol we plan
to deprecate imminently.

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