> ip_forward() (the function in the kernel that forwards IP packets (e.g.
> they're not destined for *THIS* machine) does this:
>
> if ((ip_forwarding != 1) && !source_routed_ok()) {
> /* drop this packet */
> }
>
> source_routed_ok() checks to see if the packet is going out over the
> interface it came *IN ON*. You can't source-route through a machine
> where ip_forwarding is set to anything other than '1'.
Is source_routed_ok() called whenever a source routed packet is
received (not for forwarding, just normal receipt)? If so,
can one inhibit source routed packets from being processed by
replacing _source_routed_ok in ip_input.o with a stub
that returns 0?
--
John Hawkinson
jhawk @
panix .
com
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