SteamLink NAT Forwarding

Scheme

Overlay modifications

Ethernet

/etc/init.d/startup/S50EthConfig.sh

• Static IP address (192.168.0.110)

/etc/servd.conf

• Removed delay for DCHP configuration (we don't need to be client on eth0)

/etc/connman/main.conf

• Ethernet disabled as autoconnect technology

/var/lib/connman/ethernet.config

• Ethernet disabled DHCP client

WiFi

/etc/wifi.ap

• Put name of access point to connect

/etc/wifi.passwd

• Put password for this AP

/etc/wifi.mac

• Put mac address of phone (Some time DHCP server on phone may fail, we have to setup ip address and routes manually)

/etc/init.d/startup/S19ConnmanConfig.sh

• Creating wifi service configuration file with AP and pass from above (autoconnect without UI)

/etc/init.d/startup/S52ConnectWifi.sh

• Script for connecting to AP at startup and (IMPORTANT) launching DHCP client after connect to set up correct gateway and DNS. Also launches watchdog version to redo DHCP client.

NAT

/usr/local/sbin/xtables-multi-armv7-static

• iptables v1.4.21 built with cross compilation docker image for armv7l with musl compiler (here)

  • Some modification to source code applied:
  • Add -D__GLIBC__=2 to CFLAGS in order to compile sources
  • Add #define u_intXX_t uintXX_t in order to compile sources

/etc/init.d/startup/S51EnableNat.sh

• Several kernel modules has to be loaded (luckily this version of steamlink kernel has it)
• Standard iptables nat forwarding added

MISC

/usr/local/sbin/bash

• bash armv7, because busybox sucks

/etc/profile

• /var/opt/node/bin added to PATH to get node js work. Download here: node-v12.20.0-linux-armv7

/etc/passwd

• bash as default terminal for root user (password the same: steamlink123)

/etc/init.d/startup/S90MakeLinks.sh

• script that makes work npm and npx work ( nodejs v12 supported, has to be unpacked into /overlay/var/opt/node )

Steamlink config

• Firmware number: 807
• SSH enabled
• No sleep timeout

Usage

mkdir steamlink
cd steamlink
git clone https://github.com/X-Stuff/steamlinknat.git