ip6snetc

ip6snetc is a tool for calculating and listing IPv6 networks.

License

ip6snetc is licensed under Eclipse Public License 2.0.

• EPL-2.0 FAQ

Usage

# ip6snetc <IPv6 network address> [<subnet prefix>]

Examples

Show information regarding given network / address

# ./ip6snetc 2001:db8::1/32

 --- IPv6 network / address information:

 Address 2001:db8::1
 Network 2001:db8::/32
  Prefix ffff:ffff:0000:0000:0000:0000:0000:0000
    from 2001:0db8:0000:0000:0000:0000:0000:0000
      to 2001:0db8:ffff:ffff:ffff:ffff:ffff:ffff
    Type IPv6 Address Prefix Reserved for Documentation
     RFC RFC3849
     src false
     dst false
     fwd false
  global false
IPv6 res false

Caclulate and list subnets for given network and subnet prefix

# ./ip6snetc 2001:db8::1/32 33

 --- IPv6 network / address information:

 Address 2001:db8::1
 Network 2001:db8::/32
  Prefix ffff:ffff:0000:0000:0000:0000:0000:0000
    from 2001:0db8:0000:0000:0000:0000:0000:0000
      to 2001:0db8:ffff:ffff:ffff:ffff:ffff:ffff
    Type IPv6 Address Prefix Reserved for Documentation
     RFC RFC3849
     src false
     dst false
     fwd false
  global false
IPv6 res false

 --- Subnet data:

  Subnet Prefix /33
 Subnets 2

 Network 2001:db8::/33
  Prefix ffff:ffff:8000:0000:0000:0000:0000:0000
    from 2001:0db8:0000:0000:0000:0000:0000:0000
      to 2001:0db8:7fff:ffff:ffff:ffff:ffff:ffff

 Network 2001:db8:8000::/33
  Prefix ffff:ffff:8000:0000:0000:0000:0000:0000
    from 2001:0db8:8000:0000:0000:0000:0000:0000
      to 2001:0db8:ffff:ffff:ffff:ffff:ffff:ffff

Dependencies

ip6snetc is written for luajit and Lua 5.1. It uses lua bitop (http://bitop.luajit.org/) library.

Luajit has BitOp integrated. For standard Lua one needs to install BitOp separately.

An example of installing Lua BitOp on Gentoo

# sudo emerge -v LuaBitOp

Notes

This script contains a shebang for running with Luajit.

In case you'd like to use standard Lua instead, you'll need to edit the first line of ip6snetc to be:

#!/usr/bin/env lua

Other option is to call the script directly with Lua. Example:

# lua ip6snetc 2001:db8::1/32