GSSDP implements resource discovery and announcement over SSDP

GSSDP implements resource discovery and announcement over SSDP and is part
of gUPnP. GUPnP is an object-oriented open source framework for creating
UPnP devices and control points, written in C using GObject and libsoup. The
GUPnP API is intended to be easy to use, efficient and flexible. GSSDP
implements resource discovery and announcement over SSDP.