Wireshark · Wireshark-bugs: [Wireshark-bugs] [Bug 3513] Lua dissector field registration broken

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Wenbin Shan changed bug 3513

What	Removed	Added
CC		swbchangle@163.com

Comment # 9 on bug 3513 from Wenbin Shan

I am using this workarround. Creage a TextWindow, add Field.New to the callback
method. now you need to click the menu first before you capture anything. if
you have start capture or onpened a capture file, you have to restart
wireshark/tshark.

-- test.lua
do        
    local f_ua = nil
    local f_cg = nil

    local function menuable_tap()
        -- ***** the following code is used to set up text windows *****
        -- Declare the window we will use
        tw = TextWindow.new("xxxx")

        function remove()
            -- this way we remove the listener that otherwise will remain
running indefinitely
            f_ua = nil
            f_cg = nil
            tap:remove()
        end

        -- we tell the window to call the remove() function when closed
        tw:set_atclose(remove)

        -- tap defination
        local tap = Listener.new(tap, "filter");

        -- Field references
        -- workaround for re-click menu item.
        if not f_ua and not f_cg then
            f_ua = Field.new("xxxx")
            f_cg = Field.new("xxxx")
        end

        -- this function will be called once for each packet
        function tap.packet(pinfo,tvb)

            -- get field values
            local ua = f_ua().value
            local cg = f_cg().value

            -- dosomething
        end

        -- this function will be called once every few seconds to update our
window
        function tap.draw(t)
        end

        -- this function will be called whenever a reset is needed
        -- e.g. when reloading the capture file
        function tap.reset()
            tw:clear()
        end
    end

    -- using this function we register our function
    -- to be called when the user selects the Tools->Test->Super Group Address
Counter menu
    register_menu("Test/xxxx", menuable_tap, MENU_TOOLS_UNSORTED)
end

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