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Thread: Cannot Open Socket on Specific Address/Port

  1. #1
    Junior Member
    Join Date
    Nov 2011
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    Default Cannot Open Socket on Specific Address/Port


    I have to write an interface which is IP and port limited from the source for security reasons. I'm having a problem opening a socket using local values.

    new Socket(sHostAddr, nHostPort, InetAddress.getByName(""), 1030);


    java.net.SocketException: Network is unreachable
    at java.net.PlainSocketImpl.socketConnect(PlainSocket Impl.java:-2)
    at java.net.PlainSocketImpl.doConnect(PlainSocketImpl .java:351)
    at java.net.PlainSocketImpl.connectToAddress(PlainSoc ketImpl.java:213)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.j ava:200)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.j ava:432)
    at java.net.Socket.connect(Socket.java:529)
    at java.net.Socket.connect(Socket.java:478)
    at java.net.Socket.<init>(Socket.java:375)
    at java.net.Socket.<init>(Socket.java:249)
    at ts.sswitch.s.fcic.FCICConn.openSocket(FCICConn.jav a:569)
    at ts.portal.SingletonConn.transmitterLoop(SingletonC onn.java:202)
    at ts.sswitch.s.fcic.FCICConn$1.run(FCICConn.java:155 )
    at java.lang.Thread.run(Thread.java:680)

    Changing the local values

    new Socket(sHostAddr, nHostPort, InetAddress.getByName("localhost"), 12000);

    doesn't help. But removing the local values does.

    new Socket(sHostAddr, nHostPort);

    Unfortunately, I'm going to need these values. I had this working years ago on Java 5 on the PC. I'm trying now with Java 6 on Mac OS X 10.6.8. Thanks in advance for any help.


  2. #2
    Junior Member
    Join Date
    Mar 2010
    Home-Ujjain /Job-Mumbai
    Thanked 0 Times in 0 Posts

    Default Re: Cannot Open Socket on Specific Address/Port

    Contact me at sunil1raghu@gmail.com I will provide you a socket connection ebook for java. I hope that will clear your all socket related concepts

  3. #3
    Junior Member
    Join Date
    Oct 2011
    Thanked 1 Time in 1 Post

    Default Re: Cannot Open Socket on Specific Address/Port

    One thing you can try is to use the NetworkInterface class to get the proper InetAddress.

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