## v5.6.2 (2026-02-19)

* Macaddr: use string as internal type t (thus, to_octets and of_octets no
  longer allocate) (#126 @reynir)

## v5.6.1 (2025-08-01)

* Add Ipaddr.Prefix.bits (#125 @psafont)

## v5.6.0 (2024-05-22)

* Add host and subnet Seq.t iterators for Ipaddr.V4.prefix, Ipaddr.V6.Prefix
  and Ipaddr.Prefix (#107 @verbosemode @dinosaure)
* Ipaddr.V4.compare: use Int32.unsigned_compare, as provided since OCaml 4.08
  (#118 @reynir)
* Ipaddr.V6.t is a string, not a byte vector anymore (so it is immutable)
  (#119 @reynir, restoring 4.08 compatibility #121)
* Provide Ipaddr.Prefix.address (since 5.0.0, Ipaddr.V4.Prefix.address and
  Ipaddr.V6.Prefix.address have been provided, but Ipaddr.Prefix.address was
  forgotten) (#122 @hannesm)
* Fix further docstrings (#123, fixes #81, @hannesm @reynir)

## v5.5.0 (2023-03-31)

* add `Ipaddr` `of_octet` functions (#117, @ryangibb).

## v5.4.0 (2023-03-13)

* Use Bytes.t for IPv6 addresses (#115 @verbosemode, fixes #16 @dsheets)
* Also fixes `V6.to_int64` (reported by @RyanGibb in #113)

## v5.3.1 (2022-07-04)

* Remove stdlib-shims dependency, require OCaml 4.08+ (@hannesm, #112)
* Switch to ounit2 (@Alessandro-Barbieri, #111)

## v5.3.0 (2022-03-04)

* Add `with_port_of_string` function (@dinosaure, @hannesm, #108)
* **breaking-change** Be restrictive on `Ipaddr.of_string` (@dinosaure, @hannesm, #109)
  Before this release, `Ipaddr.of_string` accepts remaining bytes and returns
  a valid value such as `"127.0.0.1aaaa"` is valid. Now, `ipaddr` does not
  accept a string with remaining bytes.

## v5.2.0 (2021-09-11)

* Use Cstruct.length instead of deprecated Cstruct.len (#106, @hannesm)
* Provide instantiated functors Set, Map, V4.Set, V4.Map, V6.Set, V6.Map
  (#106, @hannesm)

## v5.1.0 (2021-06-08)

* Reject octal notation in IPv4 (cve-2021-29921, #104, @jsachs)
* CI fixes, upgrade to ocamlformat 0.18 (@hannesm)

## v5.0.1 (2020-09-30)

* Fix V4.Prefix.broadcast and last with /32 prefixes (#102 @verbosemode)

## v5.0.0 (2020-06-16)

* Do not zero out the non-prefix-length part of the address in
  `{V4,V6}.Prefix.t` (#99 @hannesm)
  Removed `{V4,V6}.Prefix.of_address_string{,_exn}` and
  `{V4,V6}.Prefix.to_address_{string.buffer}`

  To port code:
  - if you rely on `Prefix.of_string` to zero out the non-prefix-length address
    bits, call `Prefix.prefix : t -> t` subsequently.
  - `Prefix.of_address_string{,_exn}` can be replaced by
    `Prefix.of_string{,_exn}`, to retrieve the address use
    `Prefix.address : t -> addr`.
  - The `Prefix.to_address_{string,buffer}` can be replaced by
    `Prefix.to_{string,buffer}`, where `Prefix.t` already contains the IP
    address to be printed.
  - Instead of passing `{V4,V6}.t * {V4,V6}.Prefix.t` for an
    address and subnet configuration, `{V4,V6}.Prefix.t` is sufficient.

* Implement `{V4,V6,}.succ`, `{V4,V6,}.pred`, `{V4,V6}.Prefix.first`, and
  `{V4,V6}.Prefix.last` functions (#94 @NightBlues)

* Rename `Prefix.of_netmask` to `Prefix.of_netmask_exn` with labelled
  arguments (~netmask and ~address), provide `Prefix.of_netmask` which returns
  a (t, [> `Msg of string ]) result value (#95 @hannesm)

* Fix undefined behaviour of `V4.Prefix.mem` with a CIDR with prefix length 0
  (#98 @verbosemode)

* Use stdlib-shims to prevent deprecation warnings on OCaml 4.08
  (@avsm)

* Remove unnecessary "sexplib0" dependency (#95 @hannesm)

* Remove "{build}" directive from "dune" dependency (#93 @CraigFe)

## v4.0.0 (2019-07-12)

* Rename the `to/from_bytes` functions to refer to `octets`
  instead.  This distinguishes the meaning of human-readable
  addresses (`string`s in this library) and byte-packed
  representations(`octet`s in this library) from the OCaml
  `bytes` type that represents mutable strings.

  Porting code should just be a matter of renaming functions
  such as:
   - `Ipaddr.of_bytes` becomes `Ipaddr.of_octets`
   - `Macaddr.to_bytes` becomes `Macaddr.to_octets`

* Introduce new `write_octets` functions that can write
  octet representations of IPv4/v6 into an existing bytestring.

* Use the `domain-name` library to produce domain names
  from IP addresses.

* Remove the `ipaddr.sexp` and `macaddr.sexp` ocamlfind
  subpackages and instead have `ipaddr-sexp` and `macaddr-sexp`
  to match the opam package names.

* Add new `Ipaddr_cstruct` and `Macaddr_cstruct` libraries
  for conversion to/from cstructs (#36 @nojb @avsm)

## v3.1.0 (2019-03-02)

* Do not leak a `Not_found` exception when parsing `[:`
  in IPv6 and instead raise `Parse_error` as other errors
  do (found by fuzz testing in #84 by @dinosaure)
* Install automatic toplevel printers for the Ipaddr
  types via `[@@ocaml.toplevel_printer]`. This enables
  utop to automatically install the printers (@avsm)

## 3.0.0 (2019-01-02)

This release features several backwards incompatible changes,
but ones that should increase the portability and robustness
of the library.

* Remove the sexp serialisers from the main interface in favour
  of `pp` functions.  Use the `Ipaddr_sexp` module if you still
  need a sexp serialiser.

  To use these with ppx-based derivers, simply replace the
  reference to the `Ipaddr` type definition with `Ipaddr_sexp`.
  That will import the sexp-conversion functions, and the actual
  type definitions are simply aliases to the corresponding type
  within `Ipaddr`.  For example, you might do:

  ```
  type t = {
    ip: Ipaddr_sexp.t;
    mac: Macaddr_sexp.t;
  } [@@deriving sexp]
  ```

  The actual types of the records will be aliases to the main
  library types, and there will be two new functions available
  as converters.  The signature after ppx has run will be:

  ```
  type t = {
    ip: Ipaddr.t;
    mac: Macaddr.t;
  }
  val sexp_of_t : t -> Sexplib0.t
  val t_of_sexp : Sexplib0.t -> t
  ```

* Break out the `Macaddr` module into a separate opam package so
  that the `Ipaddr` module can be wrapped.  Use the `macaddr`
  opam library now if you need just the MAC address functionality.

* Replace all the `of_string/bytes` functions that formerly returned
  option types with the `Rresult` result types instead. This stops
  the cause of the exception from being swallowed, and the error
  message in the new functions can be displayed usefully.

* In the `Ipaddr.V6.to_string` and `to_buffer` functions, remove the
  optional labelled argument `v4` and always output v4-mapped strings
  as recommended by RFC5952. (#80 by @hannesm).

* Remove `pp_hum` which was deprecated in 2.9.0.

* Sexplib0 is now used which is more lightweight tha the full
  Sexplib library. Minimum OCaml version is now 4.04.0+ as a result
  of this dependency.

* Improvements to the ocamldoc formatting strings for better
  layout and odoc compatibility.

## 2.9.0 (2018-12-11)

* Add `pp` functions for prettyprinting and deprecate `pp_hum` variants.
  The two functions are currently the same, so porting is just a matter
  of replacing existing uses of `pp_hum` with `pp` (#71 @verbosemode)
* Fix deprecation warnings on newer OCaml standard libraries (#74 @cfcs).
* Fix `base-unix` depopt to be a real dependency (#68 @rgrinberg).
* Fix missing `sexplib` dependency (#66 #67 @bmillwood).
* Port to Dune from jbuilder and update opam metadata to 2.0 format (#76 @avsm).
* Remove unused variable and bindings warnings in the implementation and
  signatures (#76 @avsm)
* Fix toplevel handling of the `ipaddr.top` package by linking
  to compiler-libs instead of compiler-libs.toplevel (#76 @avsm based on
  fix in mirage/ocaml-uri#130 by @yallop)
* Update Travis to test latest distros by using their aliases (#76 @avsm)
* Upgrade opam metadata to the 2.0 format (#76 @avsm)

## 2.8.0 (2017-06-01)

* Port to Jbuilder (#65 @vbmithr @avsm).
  There should be no observable changes, except that `Ipaddr_unix` is now
  in a separate subdirectory. This means that packages that implicitly
  depended on the module without including the ocamlfind `ipaddr.unix`
  package may now fail. Just adding the ocamlfind dependency will fix it,
  and is backwards compatible with older Ipaddr releases.
* Minimum version of OCaml required is now 4.03.0 (formerly was 4.02.2),
  due to the use of recent `ppx_sexp_conv` with Jbuilder also having that
  as the minimum supported compiler version.

## 2.7.2 (2017-02-16)

* Fix a missing findlib toploop package (#61 from Vincent Bernardoff)

## 2.7.1 (2016-11-16)

* Use topkg for build (#60 from Jochen Bartl)

## 2.7.0 (2016-02-14)

* Remove `sexplib.syntax`, `type_conv` deps and camlp4 transitive dependency
* Add `ppx_sexp_conv` dependency
* Require OCaml 4.02.2+
* Add `Ipaddr.Prefix.subset`, `Ipaddr.V4.Prefix.subset` and `Ipaddr.V6.subset`
  predicates to test containment of subnets (#52 from @seliopou)

## 2.6.1 (2015-02-20)

* Fix findlib requires in oasis to restore pre-4.02.1 compatibility

## 2.6.0 (2015-02-19)

* Change IPv6 link-local address prefix from fe80::/10 to fe80::/64. (#39)
* Remove type bytes = string alias (potentially breaking)
* Turn on -safe-string (#41)
* {V4,V6}.`to_bytes_raw` now uses Bytes.t rather than string (potentially breaking)
* Add multicast MAC conversions from RFC 1112 and RFC 2464
* Add `to_domain_name` conversions to DNS label lists (in-addr.arpa and ip6.arpa)
* Add `V6.interface_routers`, `V6.site_routers`, and `V6.Prefix.solicited_node`
* Add `V6.link_address_of_mac` to convert a MAC into a link local IP address

## 2.5.0 (2014-05-27)

* Add `with sexp` (de)serializers to all of the Ipaddr and Macaddr types. (#31)

## 2.4.0 (2014-02-11)

* Add `Ipaddr.V6.Prefix.of_netmask` for conversion from an IPv6
  address/netmask to prefix (useful for some binary interfaces). See #27.
* Add `Ipaddr.V6.Prefix.netmask` to generate a netmask address from a
  prefix (useful for some binary interfaces). See #27.
* Add `Ipaddr.Prefix.network` for generic prefix -> address conversion
* Add `Ipaddr.Prefix.netmask` for generic prefix -> netmask conversion

## 2.3.0 (2014-02-05)

* Add `Ipaddr.V4.Prefix.of_netmask` for conversion from an
  address/netmask to prefix
* Add `Ipaddr.V4.Prefix.netmask` to generate a netmask address from a prefix

## 2.2.0 (2014-01-27)

* Add an [Ipaddr_unix] module to convert to-and-from the standard library.
* Add a toplevel pretty printer in the `ipaddr.top` package.

## 2.1.0 (2014-01-20)

* Add `of_string_raw` to `Ipaddr.V4.Prefix` and `Ipaddr.V6.Prefix`
* Add `of_addr` to `Ipaddr.V4.Prefix` and `Ipaddr.V6.Prefix`
* Add type `('v4,'v6) v4v6` to `Ipaddr` to represent version disjuncts
* Add `Ipaddr.Prefix` module for generic prefix manipulation

## 2.0.0 (2014-01-17)

* Change `Ipaddr.V4.make` to accept `int` rather than `int32` (breaking)
* Add IPv6 support
* Add generic IP address support
* Add type `scope` for classifying address scopes
* Add `Ipaddr.V4.of_string_raw` for parsing inside of larger strings
* Add `Ipaddr.V4.to_int16` and `Ipaddr.V4.of_int16`
* Add `unspecified`, `nodes`, and `routers` constants to `Ipaddr.V4`
* Add `Ipaddr.V4.Prefix.network_address` to put an address into a subnet
* Add `of_address_string_exn`, `of_address_string`, `to_address_string`,
  `to_address_buffer` to `Ipaddr.V4.Prefix` to parse/print combined addr/prefix
* Add `multicast_org`, `multicast_admin`, `multicast_link` subnet constants to
  `Ipaddr.V4.Prefix`
* Add `Ipaddr.V4.scope` to classify IPv4 addresses
* Add `Ipaddr.V4.is_global` and `Ipaddr.V4.is_multicast` predicates
* Add optional `sep:char` argument to `Macaddr.to_string`
* Remove internal use of Scanf.scanf

## 1.0.0 (2013-10-16)

* Add Travis-CI testing scripts.
* Include debug symbols and annot files by default.

## 0.2.3 (2013-09-20)

* Add `Ipaddr.V4.Prefix.bits` function to produce bits of prefix from prefix.

## 0.2.2 (2013-08-07)

* Add `Macaddr.make_local` function to create local unicast MAC
  addresses from an octet generation function.
* Add `Macaddr.get_oui` accessor to extract the Organizationally Unique
  Identifier as an integer.
* Add `Macaddr.is_local` predicate to test for a locally administered address.
* Add `Macaddr.is_unicast` predicate to test for a unicast MAC address.

## 0.2.1 (2013-08-01)
* Add `Ipaddr.V4.any`, `Ipaddr.V4.broadcast`, `Ipaddr.V4.localhost`
  special constant addresses.
* Add `Ipaddr.V4.Prefix.global` (0.0.0.0/0) subnet constant.
* Add `Ipaddr.V4.Prefix.network` function to produce subnet address from prefix.

## 0.2.0 (2013-08-01)
* Add `Macaddr` module for handling MAC-48 (Ethernet) addresses.
* `Ipaddr.Parse_error` now contains both the error condition and the
  failing input.
* Add ocamldoc-compatible comments on all interfaces.

## 0.1.1 (2013-07-31)
* Add loopback and link local addresses to the private blocks.
* Fix build system so Makefile is generated by OASIS.

## 0.1.0 (2013-07-24)
* Initial public release.
* Includes IPv4 and IPv4 CIDR prefix support.
