Seagull is a multi-protocol traffic generator. Especially targeted towards IMS, Seagull supports Diameter (RFC3588 and all applications) over TCP/SCTP and IPv4/IPv6 , TCAP (over SS7 or Sigtran), XCAP over HTTP and Radius.
Rserver is a C++ written RADIUS package. Includes daemon, test, stress test and sniffer utilities. Configuration file is a list of rules. Rule may modify packet, pass to AAA engine or to proxy server. Custom AAA engine can be implemented and plugged.