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Libraries used by UnrealIRCd
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This is a list of libraries that UnrealIRCd uses (or can use):
| Library name | Required | Shipped | Windows | Reason for use | License |
|---|---|---|---|---|---|
| OpenSSL or LibreSSL | Yes | No | Yes | Support for SSL/TLS and for other cryptographic functions | Dual OpenSSL/SSLeay license or Apache License v2 (OpenSSL 3.0.0+) |
| c-ares | Yes | Yes | Yes | For DNS lookups | MIT license |
| pcre2 | Yes | Yes | Yes | Regular expressions (regex) support in Spamfilter | BSD-license |
| argon2 | Yes | Yes | Yes | For Argon2 password hashes support in Authentication types and in encrypted db files | Dual: CC0 1.0 or Apache License v2 |
| libsodium | Yes | Yes | Yes | For cryptographic functions, mainly for encrypted db files | ISC License |
| jansson | Yes | Yes | Yes | JSON library, used by JSON logging and JSON-RPC | MIT license |
| GeoIP | No | Yes | Yes | GeoIP lookups by the geoip_classic module | LGPL 2.1 or later |
| curl | No | No | Yes | For (better) Remote includes support | MIT-like license |
| libmaxminddb | No | No | No | GeoIP lookups by the geoip_maxmind module | Apache license v2 |
On *NIX you only need OpenSSL or LibreSSL on the system. Nearly all other libraries are included in the .tar.gz and used as a fallback, automatically compiled if they are not present on the system. So, installing the libraries on the system is optional (but usually a good idea), as explained in Installing from source.
On Windows the installer includes almost all libraries. The only library that is left out is libmaxminddb. This is due to a (possible) licensing restriction. This isn't important, as most people don't use geoip_maxmind but will use geoip_classic instead (which is the default).
See also
- Windows external libraries for UnrealIRCd - precompiled libraries for the Windows build