Tcpdump2ascii version 2.10 – Takes the hexadecimal output from tcpdump(8) and produces the ASCII equivalent side by side.
You can download it from the following link: https://packetstormsecurity.com/files/download/10124/tcpdump2ascii.tar.gz
Source: https://packetstormsecurity.com/files/10124/tcpdump2ascii.tar.gz.html