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The `iptoarr()` function parses the given IP address string into an array
of byte values.
Returns an array of byte values for the parsed IP address.
Returns `null` if the given IP argument is not a string value or if the
IP address could not be parsed.
-- Testcase --
{%
print(join("\n", [
iptoarr("0.0.0.0"),
iptoarr("10.11.12.13"),
iptoarr("::"),
iptoarr("::ffff:192.168.1.1"),
iptoarr("2001:db8:1234:4567:789a:bcde:f012:3456"),
iptoarr("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")
]), "\n");
%}
-- End --
-- Expect stdout --
[ 0, 0, 0, 0 ]
[ 10, 11, 12, 13 ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 192, 168, 1, 1 ]
[ 32, 1, 13, 184, 18, 52, 69, 103, 120, 154, 188, 222, 240, 18, 52, 86 ]
[ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 ]
-- End --
Supplying a non-string value or an unparsable address yields `null`.
-- Testcase --
{%
print(join("\n", [
iptoarr(true),
iptoarr("invalid")
]), "\n");
%}
-- End --
-- Expect stdout --
null
null
-- End --
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