Pcap learning notes II: pcap4j source code Notes

Environmental Science

pcap4j:1.8.3

timeval

org.pcap4j.core.NativeMappings.timeval, This class inherits from com.sun.jna.Structure.

There are two main fields ：

/** *  second  */
public NativeLong tv_sec; // long
/** *  Microsecond  */
public NativeLong tv_usec; // long

Actually in Linux in tv_sec The number of seconds used to store the current timestamp , It's usually long type ;tv_usec The number of microseconds used to store the current timestamp , It's usually int type . So it's and Linux Corresponding .