libpcap是一个系统

代码说明：

libpcap is a system-independent interface for user-level packet capture. libpcap provides a portable framework for low-level network monitoring. Applications include network statistics collection, security monitoring, network debugging, etc. -libpcap is a system-independent interfac e for user-level packet capture. libpcap provi des framework for a portable low-level network monitoring. Applications include network sta tistics collection, security monitoring, network debugging, etc..