RE: [Syslog] delineated datagrams

[Miao Fuyou <[e-mail]>]

Hi, Rainer,

Interop is a compelling reason for protocol design, so I tend to agree with
you that it is a feature nice to have. I am wondering whether we should
define procedures for frame delineating processing in syslog-tls draft
because we have both octect-counter and LF in a record.

Miao

> -----Original Message-----
> From: Rainer Gerhards [mailto:[e-mail]] 
> Sent: Friday, July 21, 2006 6:16 PM
> To: Miao Fuyou; Tom Petch; [e-mail]
> Subject: RE: [Syslog] delineated 
> datagramswasdraft-ietf-syslog-transport-tls-01.txt
> 
> Miao,
> 
> I agree with your comments. However, using the LF as a record 
> delimited would still allow us to interop with existing 
> syslog/tls implementations. This is my major point. I think 
> it is worth it.
> 
> Rainer 
> 
> > -----Original Message-----
> > From: Miao Fuyou [mailto:[e-mail]]
> > Sent: Friday, July 21, 2006 12:00 PM
> > To: 'Tom Petch'; [e-mail]
> > Subject: RE: [Syslog] delineated
> > datagramswasdraft-ietf-syslog-transport-tls-01.txt
> > 
> > 
> > TLS uses SHA-1 or MD5 in ciphersuite for message integrity 
> > verification. If bytes lost happens during transferring, 
> the message 
> > will be dropped by TLS.
> > That is also the cause that we need a security mechanism 
> for Syslog.  
> > 
> > As for error of encoding/decoding, I believe if an application does 
> > encoding/decoding in a wrong way, you must not expect it do 
> it right 
> > with other mechanism, such as LF.
> > 
> > Redundancy to improve robustness is  good idea, but I don't 
> think it 
> > applies to this case.
> > 
> > > -----Original Message-----
> > > From: Tom Petch [mailto:[e-mail]]
> > > Sent: Tuesday, June 20, 2006 8:43 PM
> > > To: [e-mail]
> > > Subject: Re: [Syslog] delineated datagrams 
> > > wasdraft-ietf-syslog-transport-tls-01.txt
> > > 
> > > I wonder if others share my concern about the lack of 
> robustness in 
> > > the way in which datagrams are delineated in the stream 
> protocol (a 
> > > TCP rather than a TLS issue).
> > > 
> > > The system works as long as
> > >  - the frame length is encoded perfectly
> > >  - the frame length is decoded perfectly
> > >  - no bytes are inserted or removed in error which is 
> doubtless true 
> > > in some networks, but I would prefer not to
> > rely on it.
> > > 
> > > So, when an error occurs, can the Collector/Relay detect it?  
> > > Can the Collector/Relay recover synch?  If not, what does the 
> > > Collector/Relay do?
> > > 
> > > There is very little redundancy in the definition of 
> frame length, 
> > > and syslog messages have very little structure to help the 
> > > application, so I think that this is an issue we should address.
> > > 
> > > Tom Petch
> > > 
> > > ----- Original Message -----
> > > From: "David B Harrington" <[e-mail]>
> > > To: <[e-mail]>
> > > Sent: Tuesday, May 09, 2006 4:26 PM
> > > Subject: [Syslog] draft-ietf-syslog-transport-tls-01.txt
> > > 
> > > 
> > > Hi,
> > > 
> > > A new revision of the syslog/TLS draft is available.
> > > 
> > 
> http://www.ietf.org/internet-drafts/draft-ietf-syslog-transport-tls-01
> > > .txt
> > > 
> > > We need reviewers.
> > > Can we get
> > > 1) a person to check the grammar?
> > > 2) a person to check the syslog technical parts?
> > > 3) a person to check compatibility with the other WG documents?
> > > 4) a person to check the TLS technical parts?
> > > 
> > > We also need general reviews of the document by multiple people.
> > > 
> > > Thanks,
> > > David Harrington
> > > co-chair, Syslog WG
> > > [e-mail]
> > > 
> > > 
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> 



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