This code will send a raw tcpip packet without data using a dll just put rawtcpip.dll in windows\system32 and run this code. you need to pass 11 arguments. The dll is raw with out much error handling. I will try to include some error handli

网关 数据转发 通过 gprs网关实现数据的 从 gsm网络到 tcpip网络的通讯-in out