ngrep-lib The ngrep library is a front-end for accessing the Packet Capture Library (libpcap) without going through the hassle of programming the filters, making sure you pick the right size for the header etc. ngrep written by Jordan Ritter . ngrep-library written by Edwin Groothuis . The ngrep-lib homepage is located at: http://www.mavetju.org/networking/programming.php