Linux-sniff v1.1 – Linux eth/tcp/ip sniffer. This tool logs printable data in the packet or it gives detailed info about the eth/tcp/ip packet headers.
You can download it from the following link: https://packetstormsecurity.com/files/download/23518/linux-sniff1.1.c
Source: https://packetstormsecurity.com/files/23518/linux-sniff1.1.c.html