OpenSLP development libraries Service Location Protocol is an IETF standard protocol that is used to discover/advertise services on the network. You can use SLP for anything from locating a suitable printer on your floor to discovering what LDAP directories are available in your organization. This package allows development of SLP applications using the OpenSLP libraries. It includes headers, libraries and links to allow static and dynamic linking. It also includes slptool, a utility to test service advertisement/lookup. The library implements RFC 2614 - An API for Service Location.