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<div class="moz-cite-prefix">On 08/15/2017 10:21 PM, Nicholas Carter
wrote:<br>
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<div>Niiiice. Still need to get one of these little guys. This
is basically my dream of a little outdoor mesh node. <br>
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Hardware wise, the AP150 is the same as the unit I picked from
Gl.inet. Their mesh protocol is <a moz-do-not-send="true"
href="http://olsr.org/">OLSR</a> which has a user space daemon
attempting to track the graph of the mesh and dynamically adjusting
the kernel routing table accordingly. It also only works with IP4.<br>
<br>
So I want to use the BATMAN-ADV protocol, which does not need to
track the mesh graph. Nodes broadcast a "Hi! My name is ..." packet
every so often, which can take multiple routes to each other node
(there is no attempt to prevent duplication, only loops in the
broadcast). The one that arrives first determines the "next hop"
route for that destination (as it is the fastest by demonstration).
Subsequent arrivals are ignored (preventing said loops). Batman
creates a virtual bridge device - which can bridge many different
interfaces - hence allowing multi-modal communication on the mesh. <br>
<br>
For clear IP6 on the mesh itself, the routers can all announce a
fixed fd00/8 prefix - no central coordination required. If people
really want IP4, we'll have to have a central authority handing out
10.0.0.0/8 subnets to anyone wanting to run a DHCP server. There
are 65536 /24 subnets in 10.0.0.0/8. Cjdns of course requires no
central coordination.<br>
<br>
For DNS, we can avoid centralization (at the cost of giving up
guaranteed global consistency) by using ssb-dns. But so far,
getting people on ssb has been as difficult as getting them to run
their own DNS server. I don't thing the routers will run scuttlebot
- DNS gateways for ssb-dns will have to be on something a little
bigger. Even an rpi0 should be able to handle it (I'll be testing
at some point).<br>
<br>
My batman routers also "just work" (the one that didn't at a recent
meetup had been reprogrammed for an experiment with trying to use
CoxWifi to carry batman packets - nope, the Cox routers block them
just like the library). OLSR could run if Cox/library allow UDP
broadcast. There also need to be some standard WAPs for
android/windows/apple to connect via Wifi. This just occurred to me
(yeah, duh!). I don't need to reinvent that wheel - the batman
routers just need to bridge the LAN port to the mesh.<br>
<br>
Looking at the Pittmesh AP150 - it is a different brand from the
GL-inet ar150, and from the manual configuration insns, it looks
like they are openwrt and you can install batman instead or OLSR.
We should see if they support better adhoc data rates.<br>
<br>
<br>
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