Ouroboros Tutorial 04

Ouroboros Tutorial 04

In this tutorial, we show how to run oping between two machines connected to the same Ethernet LAN.

For the second machine, we use a Raspberry Pi Model 4B+ (ARM64, 32-bit Raspbian 11) connected to the same WiFi LAN as my desktop (Intel 13900KF, ArchLinux).

We chose the Ethernet DIX option, because our LLC packets sometimes get dropped on wireless LANs (protocol ossification at work). To use the LLC Ethernet 0-Layer, all that is needed is to change eth-dix to eth-llc in (both) the configuration files in this tutorial (left to the reader).

We run the server on the raspberry pi. The O7s config file for the Raspberry Pi connects to the wlan0 device and registers the "oping-server" application with the Ethernet 0-Layer:

[name."oping-server"]
prog=["/usr/bin/oping"]
args=["-l"]

[eth-dix.wifi1]
bootstrap="wifi-network"
dev="wlan0"
reg=["oping-server"]

The configuration for the desktop machine (O7s client) is quite simple:

[eth-dix.wifi1]
bootstrap="wifi-network"
dev="wlan0"

Save these configurations as a file on each machine - we chose to save them at /etc/ouroboros/tut04.conf - and start an IRMd on each machine with that config file.

dstaesse@raspberrypi:~ $ sudo irmd --stdout --config /etc/ouroboros/tut04.conf
==28267== irmd(II): Ouroboros IPC Resource Manager daemon started...
==28267== irmd/configuration(II): Reading configuration from file /etc/ouroboros/tut04.conf
==28267== irmd/configuration(DB): Found service name oping-server in configuration file.
==28267== irmd(II): Created new name: oping-server.
==28267== irmd(II): Bound program /usr/bin/oping to name oping-server.
==28267== irmd/configuration(DB): Found IPCP wifi1 in configuration file.
==28267== irmd(II): Created IPCP 28279.
==28267== irmd/configuration(DB): No hash specified, using default.
==28279== ipcpd/ipcp(II): Bootstrapping...
==28279== ipcpd/eth-dix(DB): Device MTU is 1500.
==28279== ipcpd/eth-dix(DB): Layer MTU is 1500.
==28279== ipcpd/eth-dix(II): Using raw socket device.
==28279== ipcpd/eth-dix(DB): Bootstrapped IPCP over DIX Ethernet with pid 28279 and Ethertype 0xA000.
==28279== ipcpd/ipcp(II): Finished bootstrapping:  0.
==28267== irmd(II): Bootstrapped IPCP 28279 in layer wifi-network.
==28267== irmd/configuration(DB): Registering oping-server in 28279
==28267== irmd(WW): Name oping-server already exists.
==28279== ipcpd/ipcp(II): Registering f6c93ff2...
==28279== ipcpd/ipcp(II): Finished registering f6c93ff2 : 0.
==28267== irmd(II): Registered oping-server with IPCP 28279 as f6c93ff2.