c-ares is a C library for asynchronous DNS requests (including name resolves) C89 compatibility, MIT licensed, builds for and runs on POSIX, Windows, Netware, Android and many more operating systems. Download c-ares 1.12.0 (29-sep-2016) GPG Changelog You can also download old packages Communication Discussions around c-ares, its use and its development, are held on the c-ares mailing list. Please, do not mail volunteers privately about c-ares. Mailing list archive Security vulnerabilities are treated according to our security procedure, please email c-ares-security at haxx.se if you suspect one. Previous security vulnerabilities. Source code Browse the git repository on github.