SCION

Python implementation of SCION, a future Internet architecture.

doc/ contains documentation and specification of the SCION implementation
infrastructure/ contains the code of the SCION infrastructure elements (servers, routers)
lib/ contains the most relevant SCION libraries
topology/ contains the scripts to generate the SCION configuration and topology files, as well as the certificates and ROT files

Necessary steps in order to run SCION:

Make sure that you have a Go workspace setup, and that ~/.local/bin, /usr/lib/go-1.6/bin and $GOPATH/bin can be found in your $PATH variable. For example:

echo 'export GOPATH="$HOME/go"' >> ~/.profile
echo 'export PATH="$HOME/.local/bin:/usr/lib/go-1.6/bin:$GOPATH/bin:$PATH"' >> ~/.profile
source ~/.profile
mkdir -p "$GOPATH"

Check out scion into the appropriate directory inside your go workspace (or put a symlink into the go workspace to point to your existing scion checkout):
```
mkdir -p "$GOPATH/src/github.com/netsec-ethz"
cd "$GOPATH/src/github.com/netsec-ethz"
git clone https://github.com/netsec-ethz/scion
cd scion
```
Install required packages with dependencies:
```
./deps.sh all
go get -t -v ./go/...
```
Configure the host Zookeeper instance. At a minimum, add maxClientCnxns=0 to /etc/zookeeper/conf/zoo.cfg, but replacing it with docker/zoo.cfg is recommended. This has the standard parameters set, as well as using a ram disk for the data log, which greatly improves ZK performance (at the cost of reliability, so it should only be done in a testing environment).

Create the topology and configuration files (according to topology/Default.topo):

./scion.sh topology

The resulting directory structure will be created:

 ./gen/ISD{X}/AS{Y}/
     {elem}{X}-{Y}-{Z}/
         as.yml
         path_policy.yml
         supervisord.conf
         topology.yml
         certs/
             ISD{X}-AS{Y}-V0.crt
             ISD{X}-V0.trc
         keys/
             as-sig.key

The default topology looks like this.

Run the infrastructure:

./scion.sh run
Stop the infrastructure:

./scion.sh stop

Notes about topology/Default.topo:

defaults.subnet (optional): override the default subnet of 127.0.0.0/8.
core (optional): specify if this is a core AS or not (defaults to 'false').
beacon_servers, certificate_servers, path_servers, dns_servers (all optional): number of such servers in a specific AS (override the default value 1).
links: keys are ISD_ID-AS_ID (format also used for the keys of the JSON file itself) and values can either be PARENT, CHILD, PEER, or ROUTING.

Tests

In order to run the unit tests:

./scion.sh test

jpcsmith/scion-old

SCION

Tests