slirp4tinc

Attach SLiRP to a tinc UML socket, to go out from the VPN to some host net without root access.

This way the UML socket of the tinc daemon can become an VPN exit node.

The inspiration for this project came while playing around with the famous tinc daemon and some UM Linux VM, which should function as a masquerading instance, but is really big overhead, compared to this solution.

Other possible setups could use the VDE framework, but a lot of those networking stuff requires root access, which is not always necessary and available.

TODO

• testing
• configuration of the slirp parameter from commandline:
  • tinc node IP
  • network mask
  • IPv4/IPv6 settings
  • DNS settings
  • loopback access
• testing
• documentation, how to start from tincd
• packet sniffing stuff with pcap file output
• port forwarding into UML socket
• installing
• testing
• error handling for failing UML connection
• logging
• daemonize
• testing

Credits

The arg library I found somewhere in the 'net, the author is mentioned in the docs as Chun-Chung Chen [email protected].

The umlplug stuff stems from the Linux kernel UM drivers and has it's own copyright and copyleft with the authors mentioned in the file headers.

Thanks to the libvdeslirp project, making the access to libslirp so easy.