32 lines
979 B
Ruby
32 lines
979 B
Ruby
# Copyright (c) HashiCorp, Inc.
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# SPDX-License-Identifier: BUSL-1.1
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require "socket"
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module Vagrant
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module Util
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# Contains the method {#is_port_open?} to check if a port is open
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# (listening) or closed (not in use). This method isn't completely
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# fool-proof, but it works enough of the time to be useful.
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module IsPortOpen
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# Checks if a port is open (listening) on a given host and port.
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#
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# @param [String] host Hostname or IP address.
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# @param [Integer] port Port to check.
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# @return [Boolean] `true` if the port is open (listening), `false`
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# otherwise.
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def is_port_open?(host, port)
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begin
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Socket.tcp(host, port, connect_timeout: 0.1).close
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true
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rescue Errno::ETIMEDOUT, Errno::ECONNREFUSED, Errno::EHOSTUNREACH, \
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Errno::ENETUNREACH, Errno::EACCES, Errno::ENOTCONN, Errno::EALREADY
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false
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end
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end
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extend IsPortOpen
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end
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end
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end
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