Do some math on the first byte of the MAC address to invert (flip) the 7 th of 8 bits. Insert hex FFFE in the middle between the two, completing the 16 hex digits in the 2nd half of the number. # eliminate all delimiters, note that only ':' is not enough the standard is '-', but '. EUI-64 rules used by SLAAC tell you how to make the last 64 bits, as follows: Split the MAC into two halves, each 6 hex digits / 3 bytes / 24 bits long.
Here's an example of what it would look like to treat those addresses as numbers and/or objects: require 'ipaddr' Converting mac address to IPv6 link local address in Ruby Ask Question Asked 3 years ago Modified 3 years ago Viewed 353 times 1 How can I convert a mac address like 00:16:3e:15:d3:a9 into an IPv6 link local address (as modified EUI-64, like fe80::216:3eff:fe15:d3a9) in Ruby So far, I have the following steps: mac '00:16:3e:15:d3:a9' mac. Ruby actually comes with a library for manipulating IP addresses as part of its standard library. You should at least treat IP addresses or EUIs as numbers, not as text, but really, you should treat them as rich, structured IP address objects or EUI objects. Now, of course, Strings are also objects in Ruby, but they are objects which represent text, they are not objects which represent IP addresses or EUIs. You create programs by manipulating rich, structured objects, more precisely by telling rich, structured objects to manipulate themselves. Here is your main problem: Ruby is an object-oriented language.
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