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Ping jusing 1.4 PortUnreachableException ?

Rikard Qvarforth
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Hi all ! my problem is that i have made a program using the icmp.dll and java, as a java ping program . well this is not in the java spirit "all plattforms". Then i was thinking if i could do a "real" java program but using the PortUnreachableException as a referens when the icmp packet is not "answered" ? if so could i skip the use of the icmp.dll.? or if it works how can i recive the tcp/ip header information ? and if it not works like a ping... any suggestions ?
ping = pong ? :roll:
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