Messages in this thread | | | Subject | Re: [PATCH RESEND] 2.6.22.6 networking [ipv4]: fix wrong destination when reply packetes | From | David Stevens <> | Date | Thu, 20 Sep 2007 21:35:09 -0700 |
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I'm not sure why it's using rt_src here, but there are relevant cases that your description doesn't cover. For example, what happens if the source is not set in the original packet? Does NAT affect this?
You quote RFC text for ICMP echo and the case where the receiving machine is the final destination, but you're modifying code that is used for all ICMP types and used for ICMP errors generated when acting as an intermediate router.
In ordinary cases, and certainly with ICMP echo when the source is set in the original packet and no rewriting is going on (and the address is not spoofed), using the original source as the destination is fine. But have you tested or considered the other cases?
+-DLS
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