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libwireshark.dll load problem

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  • L lee64456546

    I am using qt to load libwireshark.dll (32 bit), but i always load failed. The failure info is
    0_1552378458598_2d46b507-31ec-40f2-bfac-b4d466d45ada-image.png

    I use these codes to load the dll file.
    //load dll
    QLibrary hdll(DLL_NAME);
    if(hdll.load())
    {
    qDebug() << "Load dll success";
    }
    else
    {
    QMessageBox::warning(this, "Dll Error", hdll.errorString());
    }

    Can anyone help? Thanks.

    jsulmJ Offline
    jsulmJ Offline
    jsulm
    Lifetime Qt Champion
    wrote on last edited by
    #2

    @lee64456546 Is your app 32bit or 64bit?
    Do you use same compiler which was used to build the DLL?

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

    L 2 Replies Last reply
    1
    • jsulmJ jsulm

      @lee64456546 Is your app 32bit or 64bit?
      Do you use same compiler which was used to build the DLL?

      L Offline
      L Offline
      lee64456546
      wrote on last edited by
      #3

      @jsulm no, the dll is the one provided by Wireshark.exe

      1 Reply Last reply
      0
      • jsulmJ jsulm

        @lee64456546 Is your app 32bit or 64bit?
        Do you use same compiler which was used to build the DLL?

        L Offline
        L Offline
        lee64456546
        wrote on last edited by
        #4

        @jsulm and yes, my app is 32bit.

        jsulmJ 1 Reply Last reply
        0
        • L lee64456546

          @jsulm and yes, my app is 32bit.

          jsulmJ Offline
          jsulmJ Offline
          jsulm
          Lifetime Qt Champion
          wrote on last edited by jsulm
          #5

          @lee64456546 "the dll is the one provided by Wireshark.exe" - that's clear.
          You need to find out which compiler was used to build this DLL.
          What compiler do you use?

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

          L 2 Replies Last reply
          2
          • jsulmJ jsulm

            @lee64456546 "the dll is the one provided by Wireshark.exe" - that's clear.
            You need to find out which compiler was used to build this DLL.
            What compiler do you use?

            L Offline
            L Offline
            lee64456546
            wrote on last edited by
            #6

            @jsulm I use msvc2010 to compile my project, but i don't know which compiler was used to build the dll.

            1 Reply Last reply
            0
            • jsulmJ jsulm

              @lee64456546 "the dll is the one provided by Wireshark.exe" - that's clear.
              You need to find out which compiler was used to build this DLL.
              What compiler do you use?

              L Offline
              L Offline
              lee64456546
              wrote on last edited by
              #7

              @jsulm is there a way i can find out which compiler the wireshark used ?

              1 Reply Last reply
              0
              • L lee64456546

                I am using qt to load libwireshark.dll (32 bit), but i always load failed. The failure info is
                0_1552378458598_2d46b507-31ec-40f2-bfac-b4d466d45ada-image.png

                I use these codes to load the dll file.
                //load dll
                QLibrary hdll(DLL_NAME);
                if(hdll.load())
                {
                qDebug() << "Load dll success";
                }
                else
                {
                QMessageBox::warning(this, "Dll Error", hdll.errorString());
                }

                Can anyone help? Thanks.

                CP71C Offline
                CP71C Offline
                CP71
                wrote on last edited by CP71
                #8

                @lee64456546
                HI.
                I know, it will seem a stupid question, did you check file exists and path is correct?
                "The specific module could not be found" seems file is not exist or directory is wrong

                Kent-DorfmanK L 2 Replies Last reply
                0
                • CP71C CP71

                  @lee64456546
                  HI.
                  I know, it will seem a stupid question, did you check file exists and path is correct?
                  "The specific module could not be found" seems file is not exist or directory is wrong

                  Kent-DorfmanK Offline
                  Kent-DorfmanK Offline
                  Kent-Dorfman
                  wrote on last edited by Kent-Dorfman
                  #9

                  @CP71 Also, along those lines, I see forward slashes in the directory path. I don't remember if Qt is smart enough to handle UNIX path separators on windoze...I only ever code in NIX so it's not something I ever run into. The OP didn't post where he initializes the name of the dll. He may have used "/" instead of "\".

                  The dystopian literature that served as a warning in my youth has become an instruction manual in my elder years.

                  CP71C 1 Reply Last reply
                  1
                  • Christian EhrlicherC Online
                    Christian EhrlicherC Online
                    Christian Ehrlicher
                    Lifetime Qt Champion
                    wrote on last edited by
                    #10

                    @Kent-Dorfman said in libwireshark.dll load problem:

                    He may have used "/" instead of "".

                    This does not matter as long as Qt functions are used... this is what's Qt is made for.

                    Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
                    Visit the Qt Academy at https://academy.qt.io/catalog

                    1 Reply Last reply
                    3
                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #11

                      Hi,

                      What version of Wireshark did you download ?

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

                      L 1 Reply Last reply
                      0
                      • aha_1980A Offline
                        aha_1980A Offline
                        aha_1980
                        Lifetime Qt Champion
                        wrote on last edited by
                        #12

                        to add to my mates, this error can also mean, that a dependency of the DLL you want to load is missing. Please check with Dependency Walker.

                        Regards

                        Qt has to stay free or it will die.

                        L 1 Reply Last reply
                        2
                        • SGaistS SGaist

                          Hi,

                          What version of Wireshark did you download ?

                          L Offline
                          L Offline
                          lee64456546
                          wrote on last edited by
                          #13

                          @SGaist 0_1552441474568_e9dd422a-3669-457b-a509-2294344d0551-image.png

                          1 Reply Last reply
                          0
                          • CP71C CP71

                            @lee64456546
                            HI.
                            I know, it will seem a stupid question, did you check file exists and path is correct?
                            "The specific module could not be found" seems file is not exist or directory is wrong

                            L Offline
                            L Offline
                            lee64456546
                            wrote on last edited by
                            #14

                            @CP71 I checked, the file exists and the path is correct.

                            jsulmJ 1 Reply Last reply
                            1
                            • aha_1980A aha_1980

                              to add to my mates, this error can also mean, that a dependency of the DLL you want to load is missing. Please check with Dependency Walker.

                              Regards

                              L Offline
                              L Offline
                              lee64456546
                              wrote on last edited by
                              #15

                              @aha_1980 I thought about this issue before, so the dll path i am using is actually where the wireshark is installed, all the dll files are there. If some dlls are missing, wouldn't wireshark fail to start ?

                              CP71C 1 Reply Last reply
                              0
                              • L lee64456546

                                @CP71 I checked, the file exists and the path is correct.

                                jsulmJ Offline
                                jsulmJ Offline
                                jsulm
                                Lifetime Qt Champion
                                wrote on last edited by
                                #16

                                @lee64456546 According to this https://www.wireshark.org/docs/wsdg_html_chunked/ChIntroAutomated.html Visual Studio 2013 is used.

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

                                L 1 Reply Last reply
                                1
                                • L lee64456546

                                  @aha_1980 I thought about this issue before, so the dll path i am using is actually where the wireshark is installed, all the dll files are there. If some dlls are missing, wouldn't wireshark fail to start ?

                                  CP71C Offline
                                  CP71C Offline
                                  CP71
                                  wrote on last edited by
                                  #17

                                  @lee64456546 I don’t know libwireshark.dll, but if it only is a modulo for external tools and Wireshark doesn't use it is possible Wireshark runs well, even though dependency is missed.

                                  1 Reply Last reply
                                  1
                                  • Kent-DorfmanK Kent-Dorfman

                                    @CP71 Also, along those lines, I see forward slashes in the directory path. I don't remember if Qt is smart enough to handle UNIX path separators on windoze...I only ever code in NIX so it's not something I ever run into. The OP didn't post where he initializes the name of the dll. He may have used "/" instead of "\".

                                    CP71C Offline
                                    CP71C Offline
                                    CP71
                                    wrote on last edited by
                                    #18

                                    @Kent-Dorfman
                                    I can confirm Qt works well if you use / in folder name in Windows, but I'm being honest, I hasn’t never loaded a library with Qt.

                                    1 Reply Last reply
                                    1
                                    • jsulmJ jsulm

                                      @lee64456546 According to this https://www.wireshark.org/docs/wsdg_html_chunked/ChIntroAutomated.html Visual Studio 2013 is used.

                                      L Offline
                                      L Offline
                                      lee64456546
                                      wrote on last edited by
                                      #19

                                      @jsulm maybe msvc2013 can help ?

                                      CP71C 2 Replies Last reply
                                      0
                                      • L lee64456546

                                        @jsulm maybe msvc2013 can help ?

                                        CP71C Offline
                                        CP71C Offline
                                        CP71
                                        wrote on last edited by
                                        #20

                                        @lee64456546
                                        Hi,
                                        I have tried your code and have same problem.
                                        I think is a dependencies problem.

                                        0_1552642378888_408eace4-3bbe-494f-a94a-01bbb485a466-image.png

                                        1 Reply Last reply
                                        0
                                        • L lee64456546

                                          @jsulm maybe msvc2013 can help ?

                                          CP71C Offline
                                          CP71C Offline
                                          CP71
                                          wrote on last edited by
                                          #21

                                          @lee64456546
                                          I have found out this link, it is old but maybe is current yet:

                                          https://wireshark-dev.wireshark.narkive.com/eKc7x7DR/problem-loading-custom-dll-with-standard-wireshark-distribution

                                          1 Reply Last reply
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