> +// if ((iph->ttl = tiph->ttl) == 0)
> +// iph->ttl = old_iph->ttl;
> + /* fl@fl.priv.at 1999-05-05 */
> + /* hopefully high enough to reach the end of the tunnel */
> + iph->ttl = IPDEFTTL;
Do you not find that lines commented out by you do exactly this? 8)
It is option "ttl N".
Alexey
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