Network Working Group R. Stewart
Internet-Draft Cisco Systems, Inc.
Expires: January 20, 2007 M. Tuexen
Univ. of Applied Sciences Muenster
July 19, 2006
Stream Control Transmission Protocol (SCTP) Interop Scoring
draft-stewart-tsvwg-sctpscore-04.txt
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Copyright (C) The Internet Society (2006).
Abstract
This memo describes some of the scoring to be used in the testing of
Stream Control Transmission Protocol (SCTP) at upcoming interops.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Base protocol . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Basic Communication . . . . . . . . . . . . . . . . . . . 3
2.2. Beyond Basic Communication . . . . . . . . . . . . . . . . 4
2.3. Bulk Transfer . . . . . . . . . . . . . . . . . . . . . . 6
3. Protocol Extensions . . . . . . . . . . . . . . . . . . . . . 7
3.1. Partial reliable SCTP . . . . . . . . . . . . . . . . . . 7
3.2. AUTH . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3. AddIP . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.4. PktDrpRep . . . . . . . . . . . . . . . . . . . . . . . . 8
3.5. Stream Reset . . . . . . . . . . . . . . . . . . . . . . . 8
4. Bonus Points . . . . . . . . . . . . . . . . . . . . . . . . . 9
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
6. Security Considerations . . . . . . . . . . . . . . . . . . . 9
7. Normative References . . . . . . . . . . . . . . . . . . . . . 9
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 11
Intellectual Property and Copyright Statements . . . . . . . . . . 12
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1. Introduction
This document will be used as a basis for point scoring at upcoming
SCTP interops. Its purpose is similar to that described in RFC1025
[1]. It is hoped that a clear definition of where and how to score
points will further the development of SCTP RFC2960 [4].
Note that while attending an interop no one else will score your
points for you. We trust that all implementations will faithfully
record their points that are received honestly. Note also that these
scores are NOT to be used for marketing purposes. They are for the
use of the implementations to know how well they are doing. The only
reporting that will be done is a basic summary to the Transport Area
Working Group but please note that NO company or implementation names
will be attached.
Note Bene: Checksums must be enforced. No points will be awarded if
the checksum test is disabled.
2. Base protocol
The base protocol is described in the following documents:
o RFC2960 [4]
o RFC3309 [5]
o RFC4460 [7]
These three documents are combined in 2960bis [8].
2.1. Basic Communication
These points will be scored for EACH peer implementation that you
successfully communicate with.
2 points for being the sender of the INIT chunk and completing
setup of an association.
2 points for being the sender of the INIT-ACK chunk and completing
setup of an association.
1 point for sending data on the association where you sent the
INIT.
1 point for sending data on the association where you sent the
INIT-ACK.
2 points for gracefully ending the conversation by being the
sender of the SHUTDOWN.
2 points for gracefully ending the conversation by being the
sender of the SHUTDOWN-ACK.
4 points for repeating the above without reinitializing the SCTP.
In order to receive all of the above points (14) an implementation
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will need to:
o send an INIT chunk and setup an association.
o send a data chunk on that association.
o receive a data chunk on that association.
o send a SHUTDOWN chunk and bring the association to a close.
o receive an INIT-ACK and setup a new association (after the
previous one is closed).
o send a data chunk on that association.
o receive a data chunk on that association.
o receive a SHUTDOWN chunk and send a SHUTDOWN-ACK and close the
association.
o without restarting repeat these steps once.
You can get 5 extra points if you do not include any address
parameter in the INIT-/INIT-ACK chunk in case you are using ony one
of your addresses.
You get 20 points for correctly handling unknown parameters in the
INIT and INIT-ACK chunk. A testtool for this test will be available
at the interop.
You get 10 extra points for not sending more than one packet in
response to a packet containing multiple chunks. A testtool for this
test will be available at the interop.
You can get 10 extra points for not sending chunks on non-confirmed
paths. A testtool for this test will be available at the interop.
Note that for the above extra points, these are only awarded once per
implementation and NOT every time you demonstrate this behaviour.
2.2. Beyond Basic Communication
Note that, unless otherwise specified, these points are scored once
per implementation.
10 points for bring up multiple associations at the same time to
different implementations. The implementation must send and
receive data on both associations simultaneously.
15 points for correctly handling ECN.
10 points for correctly handling both Transmission Sequence Number
(TSN) and Stream Sequence Number (SSN) wrap around.
5 points for correctly being able to process a "Kamikaze" packet
(AKA nastygram, christmas tree packet, lamp test segment, et al.).
That is, correctly handle a segment with the maximum combination
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of features at once (e.g., a COOKIE-ECHO, SACK, ASCONF, UNKNOWN-
CHUNK, SHUTDOWN).
5 additional points if the response to the "Kamikaze" packet is
bundled.
10 additional points if the implementation supports ECN and thus
the "Kamikaze" packet is expanded to include COOKIE-ECHO, SACK,
ECN, ASCONF, UNKNOWN-CHUNK, SHUTDOWN.
30 points for KOing your opponent with legal blows (That is,
operate a connection until one SCTP or the other crashes, the
surviving SCTP has KOed the other. Legal blows are chunks that
meet the requirements of the specification). Note that these
points are scored each time you KO an opponent for a new reason.
Repeated KO's of an opponent using the same method count only
once.
20 points for KOing your opponent with dirty blows (Dirty blows
are packets or chunks that violate the requirements of the
specification). Note that these points are can also be scored
multiple times just like legal blows with the same restrictions
listed above.
10 points for showing your opponents checksum is disabled or using
the old checksum aka Adler-32 RFC3309 [5]. Note that these points
are only awarded for packets that went over a physical wire (aka
it is legal to disable the checksum when talking to you own
machine via the loopback device). Note also that you can score
these points multiple times.
10 points for showing you can fast-retransmit.
10 points for showing your t3-timer retransmits to an alternate
destination (aka uses the multi-homed facility during
retransmission).
10 points for properly demonstrating the partial delivery API.
10 points for demonstrating recognition and proper handling of
restart.
10 points for correctly handling INIT collision.
10 points for correctly handling the STALE COOKIE case (sending of
the error chunk).
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10 points for an automatic resend of the INIT in case of a STALE
COOKIE with an appropriate COOKIE-PRESERVATIVE parameter such that
the association gets established.
10 points for doing bulk transfer for over 10 minutes at a high
constant rate.
5 points for handling the restart with data transfer after that.
10 points for proving that your opponent accepts additional
addresses during the restart compared to the original association.
2 points for the correct handling of an unknown chunk with high
order bits 00, 01, 10, and 11. 2 additional points (10 in total)
for handling all four cases correctly.
2 points for the correct handling of an unknown parameter with
high order bits 00, 01, 10, and 11. 2 additional points (10 in
total) for handling all four cases correctly.
5 points for handling excessive packet duplication during
association setup. Excessive packet duplication means that every
packet is duplicated in the network.
5 points for handling excessive packet duplication during DATA
transfer.
2.3. Bulk Transfer
For the following tests participants should provide a test
application which can send/receive a specific number of user messages
of a given length as fast as the protocol allows.
These points will be scored once for receiving and once for sending
for EACH peer implementation that you successfully communicate with.
A Gigabit Ethernet connection with an MTU of 9000 bytes will be
provided.
5 points for transferring 10000000 user messages of length 1 bytes
between two implementations in a reasonable time.
5 points for transferring 10000000 user messages of length 10
bytes between two implementations in a reasonable time.
5 points for transferring 10000000 user messages of length 1452
bytes between two implementations in a reasonable time.
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5 points for transferring 10000000 user messages of length 8952
bytes between two implementations in a reasonable time.
The following tests will be performed over a network connection with
a limited bandwidth of 1 Mbit/sec.
5 points for transferring 10000000 user messages of length 1 bytes
between two implementations in a reasonable time.
5 points for transferring 1000000 user messages of length 10 bytes
between two implementations in a reasonable time.
5 points for transferring 100000 user messages of length 1452
bytes between two implementations in a reasonable time.
5 points for transferring 10000 user messages of length 8952 bytes
between two implementations in a reasonable time.
A resonable time is when the transfer was limited by the sender CPU,
the receiver CPU, or the link in between.
3. Protocol Extensions
3.1. Partial reliable SCTP
This extension is described in PRSCTP [6].
10 points for sending a FWD-TSN to skip a "timed-out" data chunk.
10 points for correctly adopting the new cumulative-ack point
indicated by a FWD-TSN.
10 points for freeing data chunks to the application that were
held awaiting the FWD-TSN.
10 points for properly handling the partial-delivery API where the
last part of a message already being delivered is subjected to a
FWD-TSN.
3.2. AUTH
This extension is currently being described in AUTH [9].
10 points successfully negotiating a non-empty set of chunks to
authenticate and sending them in an authenticated way.
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10 points for handling all chunks which can be authenticated in an
authenticated way.
20 points for showing that your peer requested a chunk to be
authenticated and accepts it without being authenticated.
20 points for forecasting the random numbers of your peer.
3.3. AddIP
This extension is currently being described in ADDIP [10].
10 points for using this extension in a authenticated way as
requested by the document.
5 points for sending and receiving an adaptation layer indication.
10 points for adding an IP address to an existing association.
10 points for deleting an IP address from an existing association.
10 points for requesting that your peer set a primary address.
10 points for showing that you honored the request to set a
primary address and thus adopted a new primary address.
20 points for catching a peer that attempts to support this
extension and DOES NOT support the AUTH extension. To earn the 20
points you MUST not accept the association but instead send an
ABORT in response to your peers INIT.
3.4. PktDrpRep
This extension is currently being described in PKTDRPREP [11].
10 points for handling a packet drop report.
10 points sending a notification due to checksum errors.
3.5. Stream Reset
This extension is currently being described in STRRST [12].
5 points for handling a Outgoing SSN Reset Request.
5 points for handling an Incoming SSN Reset Request.
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5 points for handling a SSN/TSN Reset Request.
5 points for handling a Outgoing SSN Reset Request combined with
an Incoming SSN Reset Request.
Handling a request means sending it and receiving it.
4. Bonus Points
You can also Bonus Points (directly from RFC1025 [1] with one added
item :>)
10 points for the best excuse.
20 points for the fewest excuses.
20 points for the fastest transfer of 1000000 DATA chunks of 100
Byte length between two implementations. (not from RFC1025)
30 points for the longest conversation.
40 points for the most simultaneous connections.
50 points for the most simultaneous connections with distinct
SCTPs.
50 points for hijacking an existing association between other
participants.
Please note that except for that last item the whole period of the
interop is relevant.
5. IANA Considerations
There are no actions required from IANA.
6. Security Considerations
For security considerations please consult the corresponding section
of the referenced protocol specifications.
7. Normative References
[1] Postel, J., "TCP and IP bake off", RFC 1025, September 1987.
[2] Bradner, S., "The Internet Standards Process -- Revision 3",
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BCP 9, RFC 2026, October 1996.
[3] Bradner, S., "Key words for use in RFCs to Indicate Requirement
Levels", BCP 14, RFC 2119, March 1997.
[4] Stewart, R., Xie, Q., Morneault, K., Sharp, C., Schwarzbauer,
H., Taylor, T., Rytina, I., Kalla, M., Zhang, L., and V.
Paxson, "Stream Control Transmission Protocol", RFC 2960,
October 2000.
[5] Stone, J., Stewart, R., and D. Otis, "Stream Control
Transmission Protocol (SCTP) Checksum Change", RFC 3309,
September 2002.
[6] Stewart, R., Ramalho, M., Xie, Q., Tuexen, M., and P. Conrad,
"Stream Control Transmission Protocol (SCTP) Partial
Reliability Extension", RFC 3758, May 2004.
[7] Stewart, R., Arias-Rodriguez, I., Poon, K., Caro, A., and M.
Tuexen, "Stream Control Transmission Protocol (SCTP)
Specification Errata and Issues", RFC 4460, April 2006.
[8] Stewart, R., "Stream Control Transmission Protocol",
draft-ietf-tsvwg-2960bis-02 (work in progress), June 2006.
[9] Tuexen, M., "Authenticated Chunks for Stream Control
Transmission Protocol (SCTP)", draft-ietf-tsvwg-sctp-auth-03
(work in progress), June 2006.
[10] Stewart, R., "Stream Control Transmission Protocol (SCTP)
Dynamic Address Reconfiguration",
draft-ietf-tsvwg-addip-sctp-15 (work in progress), June 2006.
[11] Stewart, R., "Stream Control Transmission Protocol (SCTP)
Packet Drop Reporting", draft-stewart-sctp-pktdrprep-05 (work
in progress), June 2006.
[12] Stewart, R., "Stream Control Transmission Protocol (SCTP)
Stream Reset", draft-stewart-sctpstrrst-02 (work in progress),
February 2006.
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Authors' Addresses
Randall R. Stewart
Cisco Systems, Inc.
4875 Forest Drive
Suite 200
Columbia, SC 29206
USA
Email: rrs@cisco.com
Michael Tuexen
Univ. of Applied Sciences Muenster
Stegerwaldstr. 39
48565 Steinfurt
Germany
Email: tuexen@fh-muenster.de
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