Hi all,
I would need some feedback regarding work that is currently being done
in the GEOPRIV working group.
For some time we have been working on an application layer protocol that
allows the end host to obtain its own location information (or a
reference to it) from a server (called LIS) in the access network. This
LIS indeed needs to be located in the access network (and not at an
arbitrary place on the Internet) since only the layer 2/layer 3 provider
is able to determine the precise location of end point.
A year ago I lead a design team that captured the problem statement and
requirements. The document is available here:
http://www.ietf.org/internet-drafts/draft-ietf-geopriv-l7-lcp-ps-05.txt
The protocol that provides the functionality of the above-mentioned
requirements document is HELD:
http://tools.ietf.org/html/draft-ietf-geopriv-http-location-delivery
Providing the end host with the address of the LIS is relatively easy if
you can use DHCP. However, there are deployment environments (such as
DSL networks) where the DSL operator cannot control the DSL home routers
and any information that is provided by the DSL operator may not be
relayed to the end host via this box.
So, to overcome this issue the group had an idea: Let's use a different
discovery technique that does not require upgrades to intermediate
devices (such as this DSL home router).
In short, the current proposal (see
http://tools.ietf.org/html/draft-thomson-geopriv-lis-discovery-02.txt;
ignoring Section 2 which defines the DHCP portion) essentially does the
following:
* Discover the public IP address of the end point
* Perform a reverse DNS lookup to learn the domain
* Lookup the LIS for that domain
* Contact the LIS
We have investigated other solutions as well (see Section 4 of
http://www.ietf.org/internet-drafts/draft-ietf-geopriv-l7-lcp-ps-05.txt)
but the group (or at least a few folks) believes that this is a "good"
approach.
I had a chat with Jari and we both agree that this topoic falls into the
expertise of the Internet Area. Hence, I would like to solicit feedback
from you.
Ciao
Hannes
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