The automatic tunneling uses addresses of the form ::<IPv4>, so
if you detect that the destination is of this form, means that
the packet should be 'automatically' encapsulated.
Correct me if I am wrong.
[EMAIL PROTECTED] escribió:
>
> Hi,
> My this doubt is regarding automatic tunneling. I know that freeBSd doesnot support
>it. But i feel u can guide me in this.
> Suppose iam implementing automatic tunneling then is there a need for me to use any
>of the gif interfaces.
>
> I feel that with the present freeBSD architecture i can implement automatic
>tunneling. My idea is this when ever an ipv6 packet is to be sent over an ipv4 cloud
>then i should call the gif_output() in the nd6_output(). In the gif_output() i should
>generate the encapsulation header & call ip_output() to send the packet.
>
> The only preoblem for me is to identify that the packet is to be sent over an ipv4
>cloud. In the configured tunneling case we have a routing entry & it takes care of
>calling gif_output().
>
> FreeBSD uses the routing table to find the interface through which the packet is to
>be sent. In this case if i have to send the packet through an ipv4 cloud then i
>should specify the interface so that gif_output() is called.
>
> Kindly tell is there a way for me to find that the packet is to be tunneled in
>advance.
>
> regards
> ravi prasad
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--
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Juan F. Rodriguez Hervella
Universidad Carlos III de Madrid
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