A Python 3 UDP echo server and client for testing connections.

udpecho uses raw sockets for sending the packages. Therefore you need administrative privileges to run the client and server. On Unix Systems you request them with sudo, on Windows Systems you sould open a command line with Administrator rights.

$ sudo python3 udpecho.py --server

$ sudo python3 udpecho.py --client $IP --count 5 --size 1200 --interval 2

For a complete list of the parameters call udpecho.py with the parameter -h or --help

If you want to define the pattern yourself but don't want to search the values in the ascii table, you can use the following trick:

$ sudo python3 udpecho.py --client 127.0.0.1 --pattern `echo "MyMessage" | tr -d '\n' | xxd -ps`

The tr command removes the newline from the message and the xxd command converts the message to the hexadecimal representation as needed by the --pattern parameter

The code is based on the udp echo server by Marshall Polaris (https://github.com/mqp/udp-echo-server) and the additons by Umakant Kulkarni (https://github.com/UmakantKulkarni/udp-echo-server).

As the development derived significant from the basic implementation the project was separated from its predecessors.