Specs

unique_local?(prefix()) :: boolean()

Returns true if pfx is designated as "private-use".

This includes the rfc1918 prefixes:

• 10.0.0.0/8,
• 172.16.0.0/12, and
• 192.168.0.0/16.

And the rfc4193 prefix

• fc00::/7.

Examples

iex> unique_local?("172.31.255.255")
true

iex> unique_local?("10.10.10.10")
true

iex> unique_local?("fc00:acdc::")
true

iex> unique_local?("172.32.0.0")
false

iex> unique_local?("10.255.255.255")
true

iex> unique_local?({{172, 31, 255, 255}, 32})
true

iex> unique_local?({172, 31, 255, 255})
true

iex> unique_local?(%Pfx{bits: <<172, 31, 255, 255>>, maxlen: 32})
true

# bad prefix
iex> unique_local?("10.255.255.256")
false