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Re: ICMP Source routed packets

On Thu, Oct 12, 2000 at 04:41:36PM +0200, Raphael Bauduin wrote:
> Hi,
> I have this in my dmesg:
> ICMP: XXX.XXX.XXX.XXX: Source Route Failed.
> >From the info I found, it means this machine sent a ICMP source routed packet 
> and that this packet was rejected by the machine XXX.XXX.XXX.XXX (this is a 
> web server....).
> >From what I see, the linux kernel rejects source routed packet (option 
> CONFIG_IP_NOSR=y). But is this only for IP packets or is it applied to ICMP? 
> If it applies to ICMP, how come I get this error?

 ICMP is a protocol on the level of UDP or TCP.  It is sent inside IP.
Thus, a source routed ICMP packet _is_ a source routed IP packet.
Obviously, the answer to your question is that it will apply.

#define X(x,y) x##y
Peter Cordes ;  e-mail: X(peter@llama.nslug. , ns.ca)

"The gods confound the man who first found out how to distinguish the hours!
 Confound him, too, who in this place set up a sundial, to cut and hack
 my day so wretchedly into small pieces!" -- Plautus, 200 BCE

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