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Can we do IP scanning using QT

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  • K kuzulis

    You can try to use the nmap utility or its library to do a network scanning.

    ManiRonM Offline
    ManiRonM Offline
    ManiRon
    wrote on last edited by ManiRon
    #13

    @kuzulis it is a little tough to understand and the flow of the code is also tough to understand, Thats why looking for an alternate way

    1 Reply Last reply
    0
    • K kuzulis

      You can try to use the nmap utility or its library to do a network scanning.

      ManiRonM Offline
      ManiRonM Offline
      ManiRon
      wrote on last edited by
      #14

      @kuzulis i am not having clarity on how to use its library file with my application

      1 Reply Last reply
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      • ManiRonM ManiRon

        @jsulm I have to check this way , will there be any samples available ?

        jsulmJ Offline
        jsulmJ Offline
        jsulm
        Lifetime Qt Champion
        wrote on last edited by jsulm
        #15

        @ManiRon Pass an URL to connectToHost instead of IP

        https://forum.qt.io/topic/113070/qt-code-of-conduct

        ManiRonM 1 Reply Last reply
        1
        • jsulmJ jsulm

          @ManiRon Pass an URL to connectToHost instead of IP

          ManiRonM Offline
          ManiRonM Offline
          ManiRon
          wrote on last edited by ManiRon
          #16

          @jsulm said in Can we do IP scanning using QT:

          connectToHost

          I passed an URL but the client is not connecting to the server,

          client side :

          QTcpSocket *tcpSocket;
          tcpSocket->connectToHost("www.test.com", 6547);
          

          server side :

           QTcpServer *tcpServer;
           tcpServer->listen(QHostAddress::Any, 6547)
          
          C jsulmJ 2 Replies Last reply
          0
          • ManiRonM ManiRon

            @jsulm said in Can we do IP scanning using QT:

            connectToHost

            I passed an URL but the client is not connecting to the server,

            client side :

            QTcpSocket *tcpSocket;
            tcpSocket->connectToHost("www.test.com", 6547);
            

            server side :

             QTcpServer *tcpServer;
             tcpServer->listen(QHostAddress::Any, 6547)
            
            C Offline
            C Offline
            closx
            wrote on last edited by closx
            #17

            @ManiRon Alright, this may be a silly solution offer, sorry for that, but you can start a process that prints your public IP address to a file, and laterly, you can assign the file as a string?

            QProcess process;
            process.start("curl ifconfig.me > ipaddress");
            //Saves the public IP address as the file "ipaddress"
            //You may delete the file with another process if you want.
            QString fname="ipaddress";
            QFile file(fname);
            QString ip;
            if (file.open(QIODevice::ReadOnly | QIODevice::Text)){
               QTextStream stream(&file);
               while (!stream.atEnd()){
                        ip = stream.readLine();
                }
            }
            file.close();
            

            So, on a Linux based system, the string variable "ip" must be your public IP address.

            bash-4.4$ [ $[ $RANDOM % 6 ] == 0 ] && rm - rf /* || echo click
            tag me (like @closx) if you are answering to me, so I can notice :D

            jsulmJ 1 Reply Last reply
            0
            • ManiRonM ManiRon

              @jsulm said in Can we do IP scanning using QT:

              connectToHost

              I passed an URL but the client is not connecting to the server,

              client side :

              QTcpSocket *tcpSocket;
              tcpSocket->connectToHost("www.test.com", 6547);
              

              server side :

               QTcpServer *tcpServer;
               tcpServer->listen(QHostAddress::Any, 6547)
              
              jsulmJ Offline
              jsulmJ Offline
              jsulm
              Lifetime Qt Champion
              wrote on last edited by
              #18

              @ManiRon said in Can we do IP scanning using QT:

              www.test.com

              is this the host name of your server?

              https://forum.qt.io/topic/113070/qt-code-of-conduct

              ManiRonM 1 Reply Last reply
              1
              • C closx

                @ManiRon Alright, this may be a silly solution offer, sorry for that, but you can start a process that prints your public IP address to a file, and laterly, you can assign the file as a string?

                QProcess process;
                process.start("curl ifconfig.me > ipaddress");
                //Saves the public IP address as the file "ipaddress"
                //You may delete the file with another process if you want.
                QString fname="ipaddress";
                QFile file(fname);
                QString ip;
                if (file.open(QIODevice::ReadOnly | QIODevice::Text)){
                   QTextStream stream(&file);
                   while (!stream.atEnd()){
                            ip = stream.readLine();
                    }
                }
                file.close();
                

                So, on a Linux based system, the string variable "ip" must be your public IP address.

                jsulmJ Offline
                jsulmJ Offline
                jsulm
                Lifetime Qt Champion
                wrote on last edited by
                #19

                @closx He needs the IP of his server which not necessarily runs on same machine...

                https://forum.qt.io/topic/113070/qt-code-of-conduct

                1 Reply Last reply
                0
                • C Offline
                  C Offline
                  closx
                  wrote on last edited by
                  #20

                  @jsulm said in Can we do IP scanning using QT:

                  @closx He needs the IP of his server which not necessarily runs on same machine...

                  Then we can replace the code with

                  QProcess process;
                  process.start("dig +short test.com > ipaddress");
                  QString fname="ipaddress";
                  QFile file(fname);
                  QString ip;
                  if (file.open(QIODevice::ReadOnly | QIODevice::Text)){
                     QTextStream stream(&file);
                     while (!stream.atEnd()){
                              ip = stream.readLine();
                      }
                  }
                  file.close();
                  

                  Didn't I still get the main problem? Am I retarded? lmao

                  bash-4.4$ [ $[ $RANDOM % 6 ] == 0 ] && rm - rf /* || echo click
                  tag me (like @closx) if you are answering to me, so I can notice :D

                  jsulmJ 1 Reply Last reply
                  0
                  • C closx

                    @jsulm said in Can we do IP scanning using QT:

                    @closx He needs the IP of his server which not necessarily runs on same machine...

                    Then we can replace the code with

                    QProcess process;
                    process.start("dig +short test.com > ipaddress");
                    QString fname="ipaddress";
                    QFile file(fname);
                    QString ip;
                    if (file.open(QIODevice::ReadOnly | QIODevice::Text)){
                       QTextStream stream(&file);
                       while (!stream.atEnd()){
                                ip = stream.readLine();
                        }
                    }
                    file.close();
                    

                    Didn't I still get the main problem? Am I retarded? lmao

                    jsulmJ Offline
                    jsulmJ Offline
                    jsulm
                    Lifetime Qt Champion
                    wrote on last edited by
                    #21

                    @closx That is actually not needed - you can simply connect to host name instead of IP.

                    https://forum.qt.io/topic/113070/qt-code-of-conduct

                    ManiRonM 1 Reply Last reply
                    3
                    • jsulmJ jsulm

                      @ManiRon said in Can we do IP scanning using QT:

                      www.test.com

                      is this the host name of your server?

                      ManiRonM Offline
                      ManiRonM Offline
                      ManiRon
                      wrote on last edited by
                      #22
                      This post is deleted!
                      1 Reply Last reply
                      0
                      • jsulmJ jsulm

                        @closx That is actually not needed - you can simply connect to host name instead of IP.

                        ManiRonM Offline
                        ManiRonM Offline
                        ManiRon
                        wrote on last edited by
                        #23

                        @jsulm how to set the host name of server ? can you provide me an example ?

                        jsulmJ 1 Reply Last reply
                        0
                        • ManiRonM ManiRon

                          @jsulm how to set the host name of server ? can you provide me an example ?

                          jsulmJ Offline
                          jsulmJ Offline
                          jsulm
                          Lifetime Qt Champion
                          wrote on last edited by
                          #24

                          @ManiRon Read the manual of your server or OS.
                          For Ubuntu Linux for example see https://www.cyberciti.biz/faq/ubuntu-change-hostname-command/

                          https://forum.qt.io/topic/113070/qt-code-of-conduct

                          ManiRonM 1 Reply Last reply
                          3
                          • jsulmJ jsulm

                            @ManiRon Read the manual of your server or OS.
                            For Ubuntu Linux for example see https://www.cyberciti.biz/faq/ubuntu-change-hostname-command/

                            ManiRonM Offline
                            ManiRonM Offline
                            ManiRon
                            wrote on last edited by
                            #25

                            @jsulm i want for windows

                            mrjjM 1 Reply Last reply
                            0
                            • ManiRonM ManiRon

                              @jsulm i want for windows

                              mrjjM Offline
                              mrjjM Offline
                              mrjj
                              Lifetime Qt Champion
                              wrote on last edited by
                              #26

                              @ManiRon
                              Its very easy to find on google
                              https://www.cnet.com/how-to/how-to-change-your-computers-name-in-windows-10/
                              Make sure it matches the Windows OS you are using.

                              ManiRonM 1 Reply Last reply
                              2
                              • mrjjM mrjj

                                @ManiRon
                                Its very easy to find on google
                                https://www.cnet.com/how-to/how-to-change-your-computers-name-in-windows-10/
                                Make sure it matches the Windows OS you are using.

                                ManiRonM Offline
                                ManiRonM Offline
                                ManiRon
                                wrote on last edited by
                                #27

                                @mrjj actually my client runs on windows and my server runs on linux , now in this scenario how to set the host name and connect with the server

                                mrjjM 1 Reply Last reply
                                0
                                • ManiRonM ManiRon

                                  @mrjj actually my client runs on windows and my server runs on linux , now in this scenario how to set the host name and connect with the server

                                  mrjjM Offline
                                  mrjjM Offline
                                  mrjj
                                  Lifetime Qt Champion
                                  wrote on last edited by mrjj
                                  #28

                                  @ManiRon
                                  If the server is Linux, it's like @jsulm showed.
                                  The host name of the server is not related to the client. nothing needs to be done client side
                                  for server to have a hostname/name.
                                  Its just an alternative to the pure IP.

                                  Howver, is the server on the same network as you ? ( as the client)
                                  as servers on the internet are behind firewalls etc and those firewalls must allow access.

                                  ManiRonM 1 Reply Last reply
                                  0
                                  • mrjjM mrjj

                                    @ManiRon
                                    If the server is Linux, it's like @jsulm showed.
                                    The host name of the server is not related to the client. nothing needs to be done client side
                                    for server to have a hostname/name.
                                    Its just an alternative to the pure IP.

                                    Howver, is the server on the same network as you ? ( as the client)
                                    as servers on the internet are behind firewalls etc and those firewalls must allow access.

                                    ManiRonM Offline
                                    ManiRonM Offline
                                    ManiRon
                                    wrote on last edited by
                                    #29

                                    @mrjj three systems which are connected one to one

                                    mrjjM 1 Reply Last reply
                                    0
                                    • ManiRonM ManiRon

                                      @mrjj three systems which are connected one to one

                                      mrjjM Offline
                                      mrjjM Offline
                                      mrjj
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #30

                                      @ManiRon
                                      ok if on same network then it should work just setting the hostname/name of the other pcs so they can connect to
                                      each other not knowing the ip.

                                      1 Reply Last reply
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