jnetpcap ICMP JBuffer异常

Question

嘿，我正在尝试捕获所有ICMP流量，并且我使用此异常进行堆叠：

Opening file for reading: tmp-capture-file.pcap
Src: 192.168.1.15 Dst: 192.168.1.22
Exception in thread "main" java.lang.NullPointerException
    at org.jnetpcap.nio.JBuffer.check(JBuffer.java:108)
    at org.jnetpcap.nio.JBuffer.getUShort(JBuffer.java:415)
    at org.jnetpcap.protocol.tcpip.Tcp.destination(Tcp.java:1199)
    at Main$3.nextPacket(Main.java:304)
    at Main$3.nextPacket(Main.java:1)
    at org.jnetpcap.Pcap.loop(Native Method)
    at org.jnetpcap.Pcap.loop(Pcap.java:2445)
    at Main.Check(Main.java:344)
    at Main.main(Main.java:43)

TCP，UDP工作正常，但ICMP不允许我继续