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How to get primary and secondary DNS servers in Qt?

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  • B Offline
    B Offline
    brick
    wrote on last edited by
    #1

    I have configured on a Windows machine primary DNS server = 8.8.8.8 and secondary DNS server = 8.8.4.4. How can I find these addresses using Qt?

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    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Hi and welcome to devnet,

      Out of curiosity, why do you need that information ?

      If you would like to query them, there’s the QDnsLookup class.

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

      B 1 Reply Last reply
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      • SGaistS SGaist

        Hi and welcome to devnet,

        Out of curiosity, why do you need that information ?

        If you would like to query them, there’s the QDnsLookup class.

        B Offline
        B Offline
        brick
        wrote on last edited by
        #3

        Hi, @SGaist, thanks for replying. I need to find out the IP address of the primary DNS server to pass it to another module that requires it (pjsip). I can't use public DNS servers (like 8.8.8.8) because some organizations that use the software I'm working on blocks external DNS servers. So I need to find the primary DNS server configured on the machine.

        I took a look at QDnsLookup class before and it didn't help me. I imagine the only solution is to use QProcess to invoke nslookup and then parse the resulting string.

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        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #4

          Then indeed it's outside of Qt's scope.

          You may want to take a look at this stackoverflow post for platform specific solutions.

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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