Classic ASP

Bind and Listen on an Available Port in a Range

Demonstrates Socket.BindAndListenPortRange, which searches an inclusive port range for an available TCP port, binds it, and begins listening. It returns the selected port, or -1 on failure.

Background. This is useful when any of several ports is acceptable and the application needs to discover which one was bound.

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Classic ASP

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
set socket = Server.CreateObject("Chilkat.Socket")

'  Search the inclusive port range for an available TCP port, bind it, and begin listening.  The
'  method returns the selected port, or -1 when no port can be bound.
boundPort = socket.BindAndListenPortRange(5000,5100,25)
If (boundPort < 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( socket.LastErrorText) & "</pre>"
    Response.End
End If

Response.Write "<pre>" & Server.HTMLEncode( "Listening on port " & boundPort) & "</pre>"

%>
</body>
</html>