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https://github.com/nmap/nmap.git
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64 lines
1.3 KiB
Lua
64 lines
1.3 KiB
Lua
description = [[
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Attempts to find the owner of an open TCP port by querying an identd
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(auth - port 113) daemon which must also be open on the target system.
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]]
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author = "Diman Todorov <diman.todorov@gmail.com>"
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license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
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categories = {"default", "safe"}
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portrule = function(host, port)
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local auth_port = { number=113, protocol="tcp" }
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local identd = nmap.get_port_state(host, auth_port)
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if
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identd ~= nil
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and identd.state == "open"
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and port.protocol == "tcp"
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and port.state == "open"
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then
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return true
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else
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return false
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end
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end
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action = function(host, port)
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local owner = ""
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local client_ident = nmap.new_socket()
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local client_service = nmap.new_socket()
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local catch = function()
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client_ident:close()
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client_service:close()
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end
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local try = nmap.new_try(catch)
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try(client_ident:connect(host.ip, 113))
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try(client_service:connect(host.ip, port.number))
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local localip, localport, remoteip, remoteport =
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try(client_service:get_info())
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local request = port.number .. ", " .. localport .. "\n"
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try(client_ident:send(request))
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owner = try(client_ident:receive_lines(1))
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if string.match(owner, "ERROR") then
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owner = nil
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else
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owner = string.match(owner, "USERID : .+ : (.+)\n", 1)
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end
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try(client_ident:close())
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try(client_service:close())
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return owner
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end
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