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Diffstat (limited to 'lib/internal/net.js')
-rw-r--r-- | lib/internal/net.js | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/internal/net.js b/lib/internal/net.js new file mode 100644 index 0000000000..effc6485d2 --- /dev/null +++ b/lib/internal/net.js @@ -0,0 +1,11 @@ +'use strict'; + +module.exports = { isLegalPort }; + +// Check that the port number is not NaN when coerced to a number, +// is an integer and that it falls within the legal range of port numbers. +function isLegalPort(port) { + if (typeof port === 'string' && port.trim() === '') + return false; + return +port === (port >>> 0) && port >= 0 && port <= 0xFFFF; +} |