Lua

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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Lua

local chilkat = require("chilkat")

local socket = chilkat.Socket.new()

-- 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.
local boundPort = socket:bind_and_listen_port_range(5000, 5100, 25)
if boundPort < 0 then
    print(socket.last_error_text)
    return
end

print("Listening on port " .. boundPort)