rfc2398.txt

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   this profile identifies correctness and performance problems.

   Adding new implementations of TCP behavior is possible with tcpanaly
   through the use of C++ classes.

 Automation
   Command-line driven and only the traces of the TCP sending and
   receiving bulk data transfers are needed as input.

 Availability
   Contact Vern Paxson ([e-mail]).

 Required Environment
   C++ compiler.

 References
   [Pax97a]










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2.8.  Tcptrace

 Author
   Shawn Ostermann

 Category
   Functional Correctness / Performance

 Description
   This is a TCP trace file analysis tool. It reads output trace files
   in the formats of : tcpdump, snoop, etherpeek, and netm.

   For each connection, it keeps track of elapsed time, bytes/segments
   sent and received, retransmissions, round trip times, window
   advertisements, throughput, etc from simple to very detailed output.

   It can also produce three different types of graphs:

   Time Sequence Graph (shows the segments sent and ACKs returned as a
   function of time)

   Instantaneous Throughput (shows the instantaneous, averaged over a
   few segments, throughput of the connection as a function of time).

   Round Trip Times (shows the round trip times for the ACKs as a
   function of time)

 Automation
   Command-line driven, and uses the xplot program to view the graphs.

 Availability
   Source code is available, and Solaris binary along with sample
   traces. See http://jarok.cs.ohiou.edu/software/tcptrace/tcptrace.html
   or e-mail Shawn Ostermann ([e-mail]).

 Required Environment
   C compiler, Solaris, FreeBSD, NetBSD, HPUX, Linux.














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2.9.  Tracelook

 Author
   Greg Minshall

 Category
   Functional Correctness / Performance

 Description
   This is a Tcl/Tk program for graphically viewing the contents of
   tcpdump trace files.  When plotting a connection, a user can select
   various variables to be plotted. In each direction of the connection,
   the user can plot the advertised window in each packet, the highest
   sequence number in each packet, the lowest sequence number in each
   packet, and the acknowledgement number in each packet.

 Automation
   Command-line driven with a graphical user interface for the graph.

 Availability
   See http://www.ipsilon.com/~minshall/sw/tracelook/tracelook.html or
   e-mail Greg Minshall ([e-mail]).

 Required Environment
   A modern version of awk, and Tcl/Tk (Tk version 3.6 or higher).  The
   program xgraph is required to view the graphs under X11.

2.10.  TReno

 Author
   Matt Mathis and Jamshid Mahdavi

 Category
   Performance

 Description
   This is a TCP throughput measurement tool based on sending UDP or
   ICMP packets in patterns that are controlled at the user-level so
   that their timing reflects what would be sent by a TCP that observes
   proper congestion control (and implements SACK).  This allows it to
   measure throughput independent of the TCP implementation of end hosts
   and serve as a useful platform for prototyping TCP changes.

 Automation
   Command-line driven.  No "server" is required, and it only requires a
   single argument of the machine to run the test to.





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 Availability
   See http://www.psc.edu/networking/treno_info.html or e-mail Matt
   Mathis ([e-mail]) or Jamshid Mahdavi ([e-mail]).

 Required Environment
   C compiler, POSIX.1, raw sockets.

2.11.  Ttcp

 Author
   Unknown

 Category
   Performance

 Description
   Originally written to move files around, ttcp became the classic
   throughput benchmark or load generator, with the addition of support
   for sourcing to/from memory. It can also be used as a traffic
   absorber. It has spawned many variants, recent ones include support
   for UDP, data pattern generation, page alignment, and even alignment
   offset control.

 Automation
   Command-line driven.

 Availability
   See ftp://ftp.arl.mil/pub/ttcp/ or e-mail ARL ([e-mail]) which
   includes the most common variants available.

 Required Environment
   C compiler, BSD sockets.

2.12.  Xplot

 Author
   Tim Shepard

 Category
   Functional Correctness / Performance

 Description
   This is a fairly conventional graphing/plotting tool (xplot itself),
   a script to turn tcpdump output into xplot input, and some sample
   code to generate xplot commands to plot the TCP time-sequence graph).

 Automation
   Command-line driven with a graphical user interface for the plot.



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 Availability
   See ftp://mercury.lcs.mit.edu/pub/shep/xplot.tar.gz or e-mail Tim
   Shepard ([e-mail]).

 Required Environment
   C compiler, X11.

 References
   [She91]

3. Summary

   This memo lists all TCP tests and testing tools reported to the
   authors as part of TCP Implementer's working group and is not
   exhaustive.  These tools have been verified as available by the
   authors.

4. Security Considerations

   Network analysis tools are improving at a steady pace.  The
   continuing improvement in these tools such as the ones described make
   security concerns significant.

   Some of the tools could be used to create rogue packets or denial-
   of-service attacks against other hosts.  Also, some of the tools
   require changes to the kernel (foreign code) and might require root
   privileges to execute.  So you are trusting code that you have
   fetched from some perhaps untrustworthy remote site.  This code could
   contain malicious code that could present any kind of attack.

   None of the listed tools evaluate security in any way or form.

   There are privacy concerns when grabbing packets from the network in
   that you are now able to read other people's mail, files, etc.  This
   impacts more than just the host running the tool but all traffic
   crossing the host's physical network.

5. References

   [DJ94]    Scott Dawson and Farnam Jahanian, "Probing and Fault
             Injection of Distributed Protocol Implementations",
             University of Michigan Technical Report CSE-TR-217-94, EECS
             Department.

   [DJM96a]  Scott Dawson, Farnam Jahanian, and Todd Mitton, "ORCHESTRA:
             A Fault Injection Environment for Distributed Systems",
             University of Michigan Technical Report CSE-TR-318-96, EECS
             Department.



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   [DJM96b]  Scott Dawson, Farnam Jahanian, and Todd Mitton,
             "Experiments on Six Commercial TCP Implementations Using a
             Software Fault Injection Tool", University of Michigan
             Technical Report CSE-TR-298-96, EECS Department.

   [Pax97a]  Vern Paxson, "Automated Packet Trace Analysis of TCP
             Implementations", ACM SIGCOMM '97, September 1997, Cannes,
             France.

   [PADHV98] Paxson, V., Allman, M., Dawson, S., Heavens, I., and B.
             Volz, "Known TCP Implementation Problems", Work In
             Progress.

   [Riz97]   Luigi Rizzo, "Dummynet: a simple approach to the evaluation
             of network protocols", ACM Computer Communication Review,
             Vol. 27, N. 1, January 1997, pp.  31-41.

   [She91]   Tim Shepard, "TCP Packet Trace Analysis", MIT Laboratory
             for Computer Science MIT-LCS-TR-494, February, 1991.
































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6. Authors' Addresses

   Steve Parker
   Sun Microsystems, Inc.
   901 San Antonio Road, UMPK17-202
   Palo Alto, CA 94043
   USA

   Phone: [phone]
   EMail: [e-mail]


   Chris Schmechel
   Sun Microsystems, Inc.
   901 San Antonio Road, UMPK17-202
   Palo Alto, CA, 94043
   USA

   Phone: [phone]
   EMail: [e-mail]































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7.  Full Copyright Statement

   Copyright (C) The Internet Society (1998).  All Rights Reserved.

   This document and translations of it may be copied and furnished to
   others, and derivative works that comment on or otherwise explain it
   or assist in its implementation may be prepared, copied, published
   and distributed, in whole or in part, without restriction of any
   kind, provided that the above copyright notice and this paragraph are
   included on all such copies and derivative works.  However, this
   document itself may not be modified in any way, such as by removing
   the copyright notice or references to the Internet Society or other
   Internet organizations, except as needed for the purpose of
   developing Internet standards in which case the procedures for
   copyrights defined in the Internet Standards process must be
   followed, or as required to translate it into languages other than
   English.

   The limited permissions granted above are perpetual and will not be
   revoked by the Internet Society or its successors or assigns.

   This document and the information contained herein is provided on an
   "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
   TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
   BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
   HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
























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