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Re: IP-ID field of ICMP echo request

To: kohei@xxxxxxxxxx
Subject: Re: IP-ID field of ICMP echo request
From: YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@xxxxxxxxxxxxxx>
Date: Mon, 07 Jul 2003 22:11:19 +0900 (JST)
Cc: netdev@xxxxxxxxxxx, solt@xxxxxxxxxxxxxxxxx
In-reply-to: <Pine.LNX.4.51.0307071443080.3379@xxxxxxxxxxxxxxxxx>
Organization: USAGI Project
References: <Pine.LNX.4.51.0307071420020.2129@xxxxxxxxxxxxxxxxx> <20030707.213930.07095787.yoshfuji@xxxxxxxxxxxxxx> <Pine.LNX.4.51.0307071443080.3379@xxxxxxxxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
In article <Pine.LNX.4.51.0307071443080.3379@xxxxxxxxxxxxxxxxx> (at Mon, 7 Jul 
2003 14:48:41 +0200 (CEST)), Maciej Soltysiak <solt@xxxxxxxxxxxxxxxxx> says:

> > No, he is not talking about ICMP Identifier (RFC792 Page 14),
> > but IP Identification (RFC791 Page 29).
> Aah, yes, I misread. Sorry.
> 
> Anyway I tested it on 2.4.2 and 2.4.18, 2.5.74 and 2.4.21, they set IP ID
> to 0. At first I thought it was that issue with early 2.4, but it seems it
> has been there for a while.

It seems linux-2.2.22 behaves similarly.

Well..., I remember the DF bit.
Kohei, add "-M dont" option (do not set DF flag) and 
we can see non-zero IPID, can't we?

-- 
Hideaki YOSHIFUJI @ USAGI Project <yoshfuji@xxxxxxxxxxxxxx>
GPG FP: 9022 65EB 1ECF 3AD1 0BDF  80D8 4807 F894 E062 0EEA

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