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unstrung is an IETF roll - RPL (ripple) implementation for Linux
C++ C Shell Groff Makefile Tcl Perl

Ripple (by the Grateful Dead)

if my words did glow With the gold of sunshine and my tunes were played on the harp unstrung would you hear my voice come through the music would you hold it near as it were your own

its a hand me down the thoughts are broken perhaps they're better left unsung

ripple, in still water where there is no pebble tossed nor wind to blow.

reach out your hand, if your cup is empty if your cup is full, may be be again.

RPL, pronounced Ripple is an IETF protocol that provides connectivity among nodes that can not all hear each other, but rather have to form a multihop mesh-like network.

Unlike other mesh efforts, this all happens at layer-3, in IPv6 ICMP messages (originally, was going to be in Router Solicitation/ND messages).

The authors thinks that once RPL-style "mesh" routing is loose on citizen controlled mobile devices that citizens will no longer be held hostage to incumbent telcos that dominate the broadband "Internet".

This set of programs, plus a test bed/simulation system is a set of tools that runs under the Linux kernel: - on netbooks, - laptops, and - on phones like the Google Android, Raspberry PI, OpenWRT, etc..

Programs include: sunshine - run this on root/grounded server to announce routes and on any other well provisioned machines.

glow        - run this on very underpowered machines that
                    just need enough to join the DAG [PLANNED]

pebble      - insert DIO messages into the network, run from
        the command line [currently: senddao, senddio]

blow        - cmd line utility to control sunshine and glow.

===== community


Rudimentary web site:

to subscribe to mailing list:

====== Testing environment

This is based upon the UML-Network Testing Infrastructure (UNTI... pronounced like the british "aUNTIe") UML is UserModeLinux -- a completely paravirtualized virtualization technnology from the turn of the century.

The UMLroot image that goes with it can not be created as stock wheezy "debootstrap" image. An image that works can be found at:

In addition, there are extensive unit tests, which are invokved by "make unitcheck", and which run on, see:

Michael Richardson, Ottawa, Ontario, October 2009-2014.

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