是一个简单的，验证GTP协议数据包长度和识别GTP信令的简单C程序，只验证了GTP信令的Create PDP Context request 和Create PDP Context response以及GTP数据的TCP的东西。从CAP文件读数据，输出csv文件。-Is a simple, simple C program to verify that the GTP protocol data packet length and identification of GTP signaling, only verify the GTP signaling Create PDP Context request and Create PDP Context response and GTP data TCP stuff. Read data from the CAP file, the output csv file.