config BR2_PACKAGE_TCPING
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bool "tcping"
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help
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tcping does a TCP connect to the given ip/port
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combination. The user can specify a timeout in seconds. This
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is useful in shell scripts running in firewalled
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environments. Often SYNs are just being dropped by
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firewalls, thus connection establishment will be retried
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several times (for minutes) until a TCP timeout is
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reached. With tcping it is possible to check first if the
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desired port is reachable and then start connection
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establishment.
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http://linuxco.de/tcping/tcping.html
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