Hwangsae is a library that implements forwarding and stream access control services for Hwangsaeul.
For C API of libhwangsae see relay.h.
For relay service that makes use of libhwangsae see Gaeul relay agent.
Experimental versions of Hwangsae are daily generated in launchpad.
$ sudo add-apt-repository ppa:hwangsaeul/nightly
$ sudo apt-get update
$ sudo apt-get install libhwangsae-dev libhwangsae2