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charrua
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A DHCP library in OCaml
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charrua
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## Charrua DHCP - a DHCP client, server and wire frame encoder and decoder [](https://mirage.github.io/charrua/) [charrua](http://www.github.com/mirage/charrua) is an _ISC-licensed_ DHCP library implementation in OCaml. It provides the following packages: - charrua: a library that handles wire traffic parsing - charrua-server: a DHCP server implementation - charrua-client: a library for handling DHCP client state and messages - charrua-unix: a Unix DHCP server implementation ### Charrua The name `charrua` is a reference to the, now extinct, semi-nomadic people of southern South America. Charrua consists of the single module `Dhcp_wire` responsible for parsing and constructing DHCP messages, You can browse the API for [charrua](https://www.github.com/mirage/charrua) at https://mirage.github.io/charrua/ #### Features * `Dhcp_wire` provides marshalling and unmarshalling utilities for DHCP, it is the base for `Dhcp_server`. * Logic/sequencing is agnostic of IO and platform, so it can run on Unix as a process, as a Mirage unikernel or anything else. * All DHCP options are supported at the time of this writing. * Code is purely applicative. * It's in OCaml, so it's pretty cool. ### Charrua-server The module `Dhcp_server` supports a stripped down ISC `dhcpd.conf`, so you can probably just use your old `dhcpd.conf`. It also supports manual configuration building in OCaml. [dhcp](https://github.com/mirage/mirage-skeleton/tree/master/applications/dhcp) is a [MirageOS](https://mirage.io) DHCP unikernel server based on charrua, included as a part of the MirageOS unikernel example and starting-point repository. ### Charrua-client charrua-client is a DHCP client powered by [charrua](https://github.com/mirage/charrua). The base library exposes a simple state machine in `Dhcp_client` for use in acquiring a DHCP lease. `charrua-client-lwt` extends `charrua-client` with a functor `Dhcp_client_lwt`, using the provided modules for timing and networking logic, for convenient use by a program which might wish to implement a full client. `charrua-client-mirage` exposes an additional `Dhcp_client_mirage` for direct use with the [MirageOS library operating system](https://github.com/mirage/mirage). ### Charrua-unix Server charrua-unix is an _ISC-licensed_ Unix DHCP daemon based on [charrua](http://www.github.com/mirage/charrua). #### Features * Supports a stripped down ISC dhcpd.conf. A configuration sample can be found [here](https://github.com/mirage/charrua/blob/master/sample/dhcpd.conf) * Privilege dropping: the daemon doesn't run as root. * Almost purely-functional code. * Support for multiple interfaces/subnets. Try `charruad --help` for options. This project became one of the [Mirage Pioneer](https://github.com/mirage/mirage-www/wiki/Pioneer-Projects) projects. ## Funding This project received funding through [NGI Zero Core](https://nlnet.nl/core), a fund established by [NLnet](https://nlnet.nl) with financial support from the European Commission's [Next Generation Internet](https://ngi.eu) program. Learn more at the [NLnet project page](https://nlnet.nl/project/Mollymawk). [<img src="https://nlnet.nl/logo/banner.png" alt="NLnet foundation logo" width="20%" />](https://nlnet.nl) [<img src="https://nlnet.nl/image/logos/NGI0_tag.svg" alt="NGI Zero Logo" width="20%" />](https://nlnet.nl/core)
