Specs

eui64_decode(prefix()) :: prefix()

Decodes a modified EUI-64 back into the original EUI-48 address.

This function flips the 7-th bit and removes 16-bits from the middle. Those 16-bits should be 0xFFFE, but this is not checked or enforced.

Examples

iex> eui64_decode("0088.88FE.FF88.8888")
"02-88-88-88-88-88"

iex> eui64_decode("0288.88FF.FE88.8888")
"00-88-88-88-88-88"

iex> eui64_decode("02-88-88-FF-FE-88-88-88")
"00-88-88-88-88-88"

iex> eui64_decode({0x02, 0x88, 0x88, 0xFF, 0xFE, 0x88, 0x88, 0x88})
{0x00, 0x88, 0x88, 0x88, 0x88, 0x88}

iex> new("2001:db8:1:2:020c:29ff:fe0c:47d5")
...> |> cut(-1, -64)
...> |> eui64_decode()
...> |> format()
"00-0C-29-0C-47-D5"