# create a TUN interface and route 223.42.0.0/16 to it
sudo ip tuntap add legions mode tun user ${UID}
sudo ip addr add 223.42.0.1/16 dev legions
sudo ip link set legions up

# launch legions and instanciate a few echo services
$ ./legions legions
> help
echo <address>[-<address>] [<port>]	bind an echo service on every address (addresses created as needed)
help [<command>]	display help about commands
> echo 223.42.0.2-223.42.128.1 1234
Port: 1234
New echo instances: 32768
> 

# from the same host or any container with network access
# you can test by connecting any IP in the range
$ nc 223.42.0.2 1234
Hello !
ping
ping

$ ./generator --help
./generator <conn-rate> <conn-nb> <ip-range-start> <ip-range-end> <port>
	<conn-rate>	Number of new connections per second.
	<conn-nb>	The target number of connections