Implementation of Traceroute In Java

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Implementation of Traceroute In Java

• Instructor Dr. Byrav Rammurthy

Present by Sheng Zhang
Xueming Wu
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Outline

• Introduction
• Implementation
• Eveluation
• Conclusion

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How Traceroute Work

• ICMP_TIMXCEED
• ICMP_UNREACH_PORT or ICMP_UNREACH_PROTOCOL

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How Traceroute Work
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Socket

• Socket
• setsockopt
• sendto

• select
• recvfrom

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Socket
if ((pe getprotobyname("icmp"))
NULL) return -3
if ((c_rcvsock socket(AF_INET, SOCK_RAW,
pe-gtp_proto)) lt 0) return -4
if ((c_sndsock socket(AF_INET,
SOCK_RAW, IPPROTO_RAW)) lt 0)
close(c_rcvsock) c_rcvsock 0
return -5
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Java Native Iterface
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Java Native Iterface
public native int inittrroute(int
sockets) static
try System.loadLibrary("TrNat")
catch (UnsatisfiedLinkError e)
System.err.println("Can't Find Library")
catch (SecurityException e)
System.err.println("Can't Load
Library...Security Violation")
.. rc trobj.inittrroute(s
ockets)
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Java Native Iterface
// mtrace method public native int
inittrroute(int sockets) JNIEXPORT jint
JNICALL Java_mtrace_inittrroute (JNIEnv env,
jobject thisObj, jintArray sockets)
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Evaluation
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Conclusion

• a great opportunity
• can be evolved to a useful tool