How to measure packet loss rate, jitter and end-to-end delay ?

Here is the nice script for measuring packet loss rate, jitter and end-to-end delay in the prof. Chih-Heng Ke's website. 

http://140.116.72.80/~smallko/ns2/tool_en.htm

How to measure the throughput, packet drop rate, and end-to-end delay for UDP-based application over wireless networks is given here

http://hpds.ee.ncku.edu.tw/~smallko/ns2/wireless-udp-1.htm

This fellow has a good collection here:

http://lovefei.com/?p=19