Create an IPv6 address from the eight 16-bit fragments that make it up. This closely resembles the standard IPv6 notation, so is used for the Show instance. Note that this lacks the formatting feature for suppress zeroes in an IPv6 address, but it should be readable enough for hacking in GHCi.

>>> let addr = ipv6 0x3124 0x0 0x0 0xDEAD 0xCAFE 0xFF 0xFE00 0x1
>>> addr
ipv6 0x3124 0x0000 0x0000 0xdead 0xcafe 0x00ff 0xfe00 0x0001
>>> T.putStrLn (encode addr)
3124::dead:cafe:ff:fe00:1

This could be useful for the rare occasion in which one could construct an IPv6 from octets.

Note that while Net.IPv4.fromOctets = Net.IPv4.ipv4, Net.IPv6.fromOctets /= Net.IPv6.ipv6. While this should be obvious from their types, it is worth mentioning since the similarity in naming might be confusing.

An alias for the ipv6 smart constructor.

Build an IPv6 from four 32-bit words. The leftmost argument is the high word and the rightword is the low word.

Uncurried variant of fromWord16s.

Uncurried variant of fromWord32s.

Convert an IPv6 to eight 16-bit words.

Convert an IPv6 to four 32-bit words.

The IP address representing any host.

>>> any
ipv6 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000

The local loopback IP address.

>>> loopback
ipv6 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0001

A useful alias for loopback.

>>> localhost
ipv6 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0001

Encodes the IPv6 address using zero-compression on the leftmost longest string of zeroes in the address. Per RFC 5952 Section 5, this uses mixed notation when encoding an IPv4-mapped IPv6 address:

>>> T.putStrLn $ encode $ fromWord16s 0xDEAD 0xBEEF 0x0 0x0 0x0 0x0 0x0 0x1234
dead:beef::1234
>>> T.putStrLn $ encode $ fromWord16s 0x0 0x0 0x0 0x0 0x0 0xFFFF 0x6437 0xA5B4
::ffff:100.55.165.180
>>> T.putStrLn $ encode $ fromWord16s 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0
::

Per Section 4.2.2 of the same RFC, this does not use :: to shorten a single 16-bit 0 field. Only runs of multiple 0 fields are considered.

Encodes the IPv6 address as ShortText using zero-compression on the leftmost longest string of zeroes in the address. Per RFC 5952 Section 5, this uses mixed notation when encoding an IPv4-mapped IPv6 address.

>>> encodeShort $ fromWord16s 0xDEAD 0xBEEF 0x0 0x0 0x0 0x0ABC 0x0 0x1234
"dead:beef::abc:0:1234"

Decode an IPv6 address. This accepts both standard IPv6 notation (with zero compression) and mixed notation for IPv4-mapped IPv6 addresses. For a decoding function that additionally accepts dot-decimal-encoded IPv4 addresses, see Net.IP.decode.

Decode ShortText as an IPv6 address.

>>> decodeShort "ffff::2:b"
Just (ipv6 0xffff 0x0000 0x0000 0x0000 0x0000 0x0000 0x0002 0x000b)

Parse an IPv6 using Parser.

>>> Atto.parseOnly parser (Text.pack "dead:beef:3240:a426:ba68:1cd0:4263:109b")
Right (ipv6 0xdead 0xbeef 0x3240 0xa426 0xba68 0x1cd0 0x4263 0x109b)

Parse UTF-8-encoded Bytes as an IPv6 address. This accepts both uppercase and lowercase characters in the hexadecimal components.

>>> let str = "dead:beef:3240:a426:ba68:1cd0:4263:109b -> alive"
>>> Parser.parseBytes (parserUtf8Bytes ()) (Bytes.fromAsciiString str)
Success (Slice {offset = 39, length = 9, value = ipv6 0xdead 0xbeef 0x3240 0xa426 0xba68 0x1cd0 0x4263 0x109b})

This does not currently support parsing embedded IPv4 address (e.g. ff00:8000:abc::224.1.2.3).

Decode UTF-8-encoded Bytes into an IPv6 address.

>>> decodeUtf8Bytes (Bytes.fromAsciiString "::cab:1")
Just (ipv6 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0cab 0x0001)

Encodes the IPv6 address using zero-compression on the leftmost longest string of zeroes in the address.

>>> BB.run Nat.constant $ boundedBuilderUtf8 $ fromWord16s 0xDEAD 0xBEEF 0x0 0x0 0x0 0x0 0x0 0x1234
[0x64, 0x65, 0x61, 0x64, 0x3a, 0x62, 0x65, 0x65, 0x66, 0x3a, 0x3a, 0x31, 0x32, 0x33, 0x34]

Print an IPv6 using the textual encoding.

Smart constructor for IPv6Range. Ensures the mask is appropriately sized and sets masked bits in the IPv6 to zero.

>>> let addr = ipv6 0xDEAD 0xBEEF 0x3240 0xA426 0xBA68 0x1CD0 0x4263 0x109B
>>> printRange $ range addr 25
dead:be80::/25

Given an inclusive lower and upper ip address, create the smallest IPv6Range that contains the two. This is helpful in situations where input is given as a range, like .

This makes the range broader if it cannot be represented in CIDR notation.

>>> addrLower = ipv6 0xDEAD 0xBE80 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000
>>> addrUpper = ipv6 0xDEAD 0xBEFF 0xFFFF 0xFFFF 0xFFFF 0xFFFF 0xFFFF 0xFFFF
>>> printRange $ fromBounds addrLower addrUpper
dead:be80::/25

Normalize an IPv6Range. The first result of this is that the IPv6 inside the IPv6Range is changed so that the insignificant bits are zeroed out. For example:

>>> addr1 = ipv6 0x0192 0x0168 0x0001 0x0019 0x0000 0x0000 0x0000 0x0000
>>> addr2 = ipv6 0x0192 0x0168 0x0001 0x0163 0x0000 0x0000 0x0000 0x0000
>>> printRange $ normalize $ IPv6Range addr1 24
192:100::/24
>>> printRange $ normalize $ IPv6Range addr2 28
192:160::/28

The second effect of this is that the mask length is lowered to be 128 or smaller. Working with IPv6Ranges that have not been normalized does not cause any issues for this library, although other applications may reject such ranges (especially those with a mask length above 128).

Note that 'normalize is idempotent, that is:

normalize r == (normalize . normalize) r

Checks to see if an IPv6 address belongs in the IPv6Range.

>>> let ip = ipv6 0x2001 0x0db8 0x0db8 0x1094 0x2051 0x0000 0x0000 0x0001
>>> let iprange mask = IPv6Range (ipv6 0x2001 0x0db8 0x0000 0x0000 0x0000 0x0000 0x0000 0x0001) mask
>>> contains (iprange 8) ip
True
>>> contains (iprange 48) ip
False

Typically, element-testing functions are written to take the element as the first argument and the set as the second argument. This is intentionally written the other way for better performance when iterating over a collection. For example, you might test elements in a list for membership like this:

>>> let r = IPv6Range (ipv6 0x2001 0x0db8 0x0000 0x0000 0x0000 0x0000 0x0000 0x0001) 64
>>> fmap (contains r) (take 5 $ iterate succ $ ipv6 0x2001 0x0db8 0x0000 0x0000 0xffff 0xffff 0xffff 0xfffe)
[True,True,False,False,False]

The implementation of contains ensures that (with GHC), the bitmask creation and range normalization only occur once in the above example. They are reused as the list is iterated.

This is provided to mirror the interface provided by Data.Set. It behaves just like contains but with flipped arguments.

member ip r == contains r ip

The inclusive lower bound of an IPv6Range. This is conventionally understood to be the broadcast address of a subnet. For example:

>>> T.putStrLn $ encode $ lowerInclusive $ IPv6Range (ipv6 0x2001 0x0db8 0x0000 0x0000 0x0000 0x0000 0x0000 0x0001) 25
2001:d80::

Note that the lower bound of a normalized IPv6Range is simply the ip address of the range:

lowerInclusive r == ipv6RangeBase (normalize r)

The inclusive upper bound of an IPv6Range.

>>> let addr = ipv6 0xDEAD 0xBEEF 0x3240 0xA426 0xBA68 0x1CD0 0x4263 0x109B
>>> T.putStrLn $ encode $ upperInclusive $ IPv6Range addr 25
dead:beff:ffff:ffff:ffff:ffff:ffff:ffff

Encode an IPv6Range as Text.

>>> addr = ipv6 0xDEAD 0xBEEF 0x3240 0xA426 0xBA68 0x1CD0 0x4263 0x109B
>>> T.putStrLn $ encodeRange $ IPv6Range addr 28
dead:beef:3240:a426:ba68:1cd0:4263:109b/28

Decode an IPv6Range from Text.

>>> addr = ipv6 0xDEAD 0xBEEF 0x3240 0xA426 0xBA68 0x1CD0 0x4263 0x109B
>>> fmap encodeRange $ decodeRange (Text.pack "dead:beef:3240:a426:ba68:1cd0:4263:109b/28")
Just "dead:bee0::/28"

Parse an IPv6Range using a Parser.

Print an IPv6Range using the textual encoding.

Parse UTF-8-encoded Bytes into an IPv4Range. This requires the mask to be present.

>>> maybe (putStrLn "nope") printRange $ Parser.parseBytesMaybe (parserRangeUtf8Bytes ()) (Bytes.fromAsciiString "1b02:f001:5:200b::/80")
1b02:f001:5:200b::/80
>>> maybe (putStrLn "nope") printRange $ Parser.parseBytesMaybe (parserRangeUtf8Bytes ()) (Bytes.fromAsciiString "abcd::")
nope

See parserRangeUtf8BytesLenient for a variant that treats a missing mask as a /32 mask.

Variant of parserRangeUtf8Bytes that allows the mask to be omitted. An omitted mask is treated as a /128 mask.

>>> maybe (putStrLn "nope") printRange $ Parser.parseBytesMaybe (parserRangeUtf8BytesLenient ()) (Bytes.fromAsciiString "1b02:f001:5:200b::/80")
1b02:f001:5:200b::/80
>>> maybe (putStrLn "nope") printRange $ Parser.parseBytesMaybe (parserRangeUtf8BytesLenient ()) (Bytes.fromAsciiString "abcd::")
abcd::/128

A 128-bit Internet Protocol version 6 address.

An IPv6Range. It is made up of the first IPv6 in the range and its length.