clknetsim is a clock and network simulator designed for testing unmodified NTP servers and clients. The NTP applications have all necessary system functions related to networking and clocks replaced by LD_PRELOAD mechanism and are clients of clknetsim server which provides access to the virtual network and clocks.
Supported are chrony and ntp on Linux.
See README for more information.
git clone git://fedorapeople.org/home/fedora/mlichvar/public_git/clknetsim.git
The latest git snapshot is available here.(due to a gitweb issue you might need to rename the file to *.tar.gz.gz and ungzip twice)
Gitweb is located here.