Ethereal-dev: Re: [Ethereal-dev] SCTP stat and Agentx dissector
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From: Michael Tuexen <Michael.Tuexen@xxxxxxxxxxxxxxxxx>
Date: Wed, 9 Feb 2005 22:38:10 +0100
Hi Oleg, see my comments in-line. Best regards Michael On Feb 9, 2005, at 22:32 Uhr, Terletsky Oleg wrote:
Hi Michael, The reason I added SCTP conversation is because I found it very useful for measuring retransmissions on mutihomed association. It helps to identify network configuration problems. With regards to filters I didn't finish it yet. But if your sctp_stat already doing it I'm not going to do it. The bottom line is that we needed counters for each chunk sent and received from/to each SCTP endpoint.
Do you need this per association or per end-point?The analysis in Ethereal can plot TSNs over the time. So you can see retransmissions...
Thanks, Oleg. -----Original Message----- From: Michael Tuexen [mailto:Michael.Tuexen@xxxxxxxxxxxxxxxxx] Sent: Tuesday, February 08, 2005 5:07 PM To: Terletsky Oleg Cc: ethereal-dev@xxxxxxxxxxxx; guy@xxxxxxxxxxxx Subject: Re: [Ethereal-dev] SCTP stat and Agentx dissector Hi Oleg,I have played with the SCTP code you sent and have some comments: 1. Howmuch sense does it make to have SCTP conversations? I'm wondering, because for UDP or TCP this corresponds to a TCP connection or a UDP communication relation. But for SCTP it has no sense, since SCTP associations are multihomed. Guy, what do you mean? 2. If the user specifies a display filter for an association you provide a statistic for the chunks. Currently on the last chunk within each packet matching the display filter is counted. How do you use this feature? Do you need this counter per association for each direction separately or do you use also other filters? We could integrate such a statisticin the SCTP analysis window which shows information per association.Best regards Michael On Feb 7, 2005, at 20:06 Uhr, Terletsky Oleg wrote:Hi, With regards to SCTP stat. I think it's great that you already have something. We will start using it as soon as you publish it. It just currently we in the middle of the testing some big project that includes SCTP measurement stuff and I found it very useful for our testers instead of struggle with bunch of filters just get all information in one shot. Guy, Another question is AgentX dissector. I sent the tarball and I'd like a to get some comments on it also. Thanks, Oleg. -----Original Message----- From: Terletsky Oleg Sent: Friday, February 04, 2005 4:58 PM To: 'ethereal-dev@xxxxxxxxxxxx' Cc: 'guy@xxxxxxxxxxxx' Subject: [Ethereal-dev] SCTP stat and Agentx dissector Sorry for the wrong subject in the prev. message. Hi, I'd like contribute another work to ethereal community. 1) I've added some statistics to SCTP. tap-sctp.tgz contains the following: gtk/sctp_stat.c - contains SCTP stat. GUI tap-sctpstat.c - tethereal variant of the same stat. gtk/conversation_sctp.c - impl. of SCTP conversation info. tap-sctp.patch - has a changes for packet-sctp.[hc] and tap-iousers.c and also for list of CM files in order to support sctp stat and AgentX plug-in. 2) Plug-in dissector for AgentX protocol. I've tested it on Linux RHAS 3.0 It builds and executes fine. Thanks. Oleg.______________________________________________________________________ This email message has been scanned by PineApp Mail-Secure and has been found clean.
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