Subject: Re: ICMP handling for a fragmented packet.
To: Rohit Dhawan <email@example.com>
From: Charles M. Hannum <firstname.lastname@example.org>
Date: 03/18/2001 22:15:52
On Mon, Mar 19, 2001 at 10:57:34AM +0530, Rohit Dhawan wrote:
> Consider a packet, which gets fragmented while traversing through the network, such that the Fragment One has the higher layer header (say TCP header, with associated port numbers etc.). Lets us consider a case when (say) fragment Seven's TTL becomes zero & an ICMP message is sent back to the Message Source. At the source, there is no way of identifying the port number of the originator of the message.
> In such a scenario, could you explain how would the Source handle the packet?
You're thinking too hard. ICMP TIME EXCEEDED is basically ignored by
a host, so the presence or absence of connection information in the
packet is irrelevant.
> NB: I donot belong to your mailing list. I'll like to join it - if you think that is possible.
The list is open to the public. Send mail to email@example.com.