CODEWITHSUNDEEP
javajcifs
tiwiz
tiwiz

Reputation: 327

Get hostname from IP with JCIFS

I'm trying to understand how to get the name of a computer on my LAN given the IP address with JCIFS but I can't get anything but its IP.

The code I'm using is

    InetAddress addr = NbtAddress.getByName( ip ).getInetAddress();
    String test = UniAddress.getByName(ip).getHostName();
    System.out.println("IP: " + ip + " - addr: " + addr.getHostName() + " - test: " + test);

And the result I'm getting is

    IP: 10.1.2.115 - addr: 10.1.2.115 - test: 10.1.2.115

If instead I replace the getHostAddress() with toString() what I get is

    IP: 10.1.2.115 - addr: 10.1.2.115 - test: 0.0.0.0<00>/10.1.2.115

Where am I wrong here?

I'm testing the lib from a Mac with IP 10.1.2.117, while the target is an Android device.

Upvotes: 3

Views: 3077

Answers (4)

horst
horst

Reputation: 11

    /*
      Jcifs 1.3 no longer calls NbtAddress#checkData() in 
      NbtAddress#getHostName, so you need to actively call 
      NbtAddress#getNodeType() or NbtAddress#isGroupAddress() before acquiring hostName.
    */
    UniAddress address= UniAddress.getByName(currentIp,
                    true);
    Object o = address.getAddress();
    if (o instanceof NbtAddress) {
        NbtAddress nbtAddress = (NbtAddress) o;
        // jcifs 1.3 need call this method for request netbios name.
        nbtAddress.getNodeType();
    }
    ipScan.domain = address.getHostName();

Upvotes: 1

Justin Song
Justin Song

Reputation: 181

JCIFS stop supports Netbios name resolution on 1.3.14 version. You can find release notes for stopping this. https://jcifs.samba.org/

Upvotes: 2

dmoney55
dmoney55

Reputation: 9

A bit late, but I had the same problem with jcifs 1.3.17. I reverted to 1.2.25 and it now works.

Upvotes: 0

Steve
Steve

Reputation: 21499

Can you use the standard java api instead? If so try the following 

InetAddress addr = InetAddress.getByName("127.0.0.1");
String host = addr.getHostName();

Upvotes: -2

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