Chronological Thread 

< Chronological >      < Thread >

---

You can run ethereal in the middle to see which implementation
violates the spec. Ethereal also calculates the checksum and
shows if it is right or not.

Best regards
Michael

On Mar 31, 2004, at 12:12 PM, Andreas Jungmaier wrote:

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi,

actually this is not the appropriate place to discuss the
OpenSS7 SCTP implementation.

This mailing list was created for the discussion around
sctlib, which is a userland SCTP implementation, and the
socket-api library, which adds a socket interface to sctplib.

For questions on the OpenSS7 implementation you might
want to contact Brian Bidulock (not sure if there is also
a mailing list for this implementation). His address is
<bidulock AT openss7.org>

Best regards,
Andreas

On Mittwoch 31 März 2004 11:53, S.Gobinath wrote:

Dear!
We are using Linux 2.4.18 and to support SCTP we have
downloaded the patch provided in www.openss7.org.
<http://www.openss7.org./>
We have configured two systems with the patch file
kernel-2.4.18-sctp.0.2.19.gz.

We tried to communicate between two systems through SCTP socket
programming. But the association between two is not able to establish.
We also captured the packets using ethereal network analyzer.

We found one system generating correct 32-bit Check sum and
the other one always sending the check sum value as "0x00000000"

The scenario we found is as follows,

END A
END B
(Sends INIT with
------------------------------------------>(receives the INIT and
validates the checksum)
Correct check sum)


(Discards the INIT ACK
Since check sum is not correct)
<----------------------------------------(Send INIT ACK with check sum
value as 0x00000000)

(After Time out)

(Sends INIT with
------------------------------------------>(receives the INIT and
validates the checksum)
Correct check sum)


(Discards the INIT ACK
Since check sum is not correct)
<----------------------------------------(Send INIT ACK with check sum
value as 0x00000000)

(Same process is getting repeated)


Please tell us how to make two systems to communicate with proper check
sum value.

With best regards,
S.Gobinath.

- --
Dipl.-Ing. Andreas Jungmaier
Computer Networking Technology Group
University of Duisburg-Essen
http://www.exp-math.uni-essen.de/~ajung
PGP Key-ID: D382 4AC0

PGP Key-Fingerprint: 228C 7C2C 3381 2DD4 9998 2812 5C0B 0B04 D382 4AC0
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.3 (GNU/Linux)

iD8DBQFAapmmXAsLBNOCSsARAtaHAJ4qTGjhVF1Hqq88557QJ92aj9qGEQCgwhY7
Y8BkBPbZxb8Z+mRZrs4J66Q=
=pgEH
-----END PGP SIGNATURE-----
_______________________________________________
discussion mailing list
discussion AT sctp.de
http://www.sctp.de/mailman/listinfo/discussion

---

• [SCTP-Discussion] CRC calculation problem, S.Gobinath, 03/31/2004
  • Re: [SCTP-Discussion] CRC calculation problem, Andreas Jungmaier, 03/31/2004
    • Re: [SCTP-Discussion] CRC calculation problem, Michael Tuexen, 03/31/2004

---

Archive powered by MHonArc 2.6.19+.