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Question:

TCP/IP connection failed to establish for a tunnel inside another tunnel

Jul 16 '15 at 02:28

I am developing an android application for which I need to do Ssh multiple port forwarding. I have opened an Ssh tunnel within already opened Ssh tunnel. But the connection is not being established Here is my code :

 protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

    CkSocket tunnel = new CkSocket();

    boolean success;

    //  Anything unlocks the component and begins a fully-functional 30-day trial.
    success = tunnel.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        Log.i(TAG, tunnel.lastErrorText());
        return;
    }

    String sshHostname1 = "IP1";
    int sshPort1 = port1;
    success=tunnel.SshOpenTunnel(sshHostname1,sshPort1);
    if (success != true) {
        Log.i(TAG, tunnel.lastErrorText());
        System.out.println("error in estab conn");
        return;
    }
    success = tunnel.SshAuthenticatePw("uname", "pwd");
    if (success != true) {
        Log.i(TAG, tunnel.lastErrorText());
        System.out.println("login error");
        return;
    }
    System.out.println("opened 1st tunnel");

    String sshHostname2 = "IP2";
    int sshPort2 = port2;
    success=tunnel.SshOpenTunnel("sshHostname2",sshPort2);
    if (success != true) {
        Log.i(TAG, tunnel.lastErrorText());
        System.out.println("error in est conn");
        return;
    }
    success = tunnel.SshAuthenticatePw("u2", "p2");
    if (success != true) {
        Log.i(TAG, tunnel.lastErrorText());
        System.out.println("login error");
        return;
    }
    System.out.println("opened 3rd tunnel");

}
  static {
        // Important: Make sure the name passed to loadLibrary matches the shared library
        // found in your project's libs/armeabi directory.
        //  for "libchilkat.so", pass "chilkat" to loadLibrary
        //  for "libchilkatemail.so", pass "chilkatemail" to loadLibrary
        //  etc.
        //
        System.loadLibrary("chilkat");
    // Note: If the incorrect library name is passed to System.loadLibrary,
    // then you will see the following error message at application startup:
    //"The application <your-application-name> has stopped unexpectedly. Please try again."
}

1st tunnel is opening, but error is thrown on attempting to open 2nd tunnel. Here is the error log:

    SshOpenTunnel:
    DllDate: Jun 23 2015
    ChilkatVersion: 9.5.0.51
    UnlockPrefix: Anything for 30-day trial
    Architecture: Little Endian; 32-bit
    Language: Android Java
    VerboseLogging: 0
    objectId: 1
    sshOpenTunnel:
    sshHostname: 10.215.9.15
    port: 22
    sshTunnel:
    tunnelIdleTimeoutMs: 0
    tunnelConnectTimeoutMs: 30000
    sshConnect:
    connectSocket:
    connect_ipv6_or_ipv4:
    timeout waiting for connect to complete
    numSec: 30
    numMicroSec: 0
    failedWaitToConnect: Socket operation timeout.
    --connect_ipv6_or_ipv4
    --connectSocket
    Failed to establish initial TCP/IP connection
    --sshConnect
    --sshTunnel
    --sshOpenTunnel
    Failed.
    --SshOpenTunnel
    --ChilkatLog
07-15 11:13:34.753    8432-8432/System.out﹕ error in est conn

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Accepted Answer