Pfx.eui64_encode
You're seeing just the function
eui64_encode, go back to Pfx module for more information.
Specs
Create a modified EUI-64 out of eui48 (an EUI-48 address).
Despite rfc7217, modified
EUI-64's are still used in the wild. This flips the 7-th bit and inserts
0xFFFE in the middle. EUI's in tuple form, should be encoded by
Pfx.from_mac/1 first. That always yields, pending any encoding errors, a
Pfx-struct, so to get the result in tuple-form, reroute it through
Pfx.digits/2.
Example
iex> eui64_encode("0088.8888.8888")
"02-88-88-FF-FE-88-88-88"
iex> eui64_encode("0288.8888.8888")
"00-88-88-FF-FE-88-88-88"
iex> from_mac({0x00, 0x88, 0x88, 0x88, 0x88, 0x88}) |> eui64_encode() |> digits(8)
{{0x02, 0x88, 0x88, 0xFF, 0xFE, 0x88, 0x88, 0x88}, 64}