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# n-acd - IPv4 Address Conflict Detection
## CHANGES WITH 2:
* All public destructors now include a variant that returns `void`.
This was requested for easier integration with `glib` and friends.
Similar to the `cleanup` variants, these variants are denoted by a
single-character function-name suffix. E.g., `n_acd_freev()`
* A fallback to `CLOCK_MONOTONIC` is now provided in case
`CLOCK_BOOTTIME` is not supported by the kernel. Note that this is in
no way signalled through the API, so if timers should follow the
`BOOTTIME` rather than monotonic clock, a kernel with this clock is
required.
* The `c-sundry` dependency is no longer needed.
* The `transport` configuration property is now mandatory for
`n_acd_new()`. It defaulted to `ETHERNET` before, by mistake.
* In-source documentation for the public API is now provided.
Contributions from: Beniamino Galvani, David Herrmann, David
Rheinsberg, Thomas Haller, Tom Gundersen
- Tübingen, 2019-03-20
## CHANGES WITH 1:
* Initial release of n-acd. This project implements the IPv4 Address
Conflict Detection standard as defined in RFC-5227. The state machine
is implemented in a shared library and provides a stable ISO-C11 API.
The implementation is linux-only and relies heavily on the API
behavior of recent linux kernel releases.
* Compared to the pre-releases, this release supports many parallel
probes on a single n-acd context. This reduces the number of
allocated network resources to O(1), based on the number of running
parallel probes.
* The n-acd project is now dual-licensed: ASL-2.0 and LGPL-2.1+
Contributions from: Beniamino Galvani, David Herrmann, Thomas Haller,
Tom Gundersen
- Tübingen, 2018-08-08
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