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IterateForAssignment: Properly handle invalid syntax for exclude range #365

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andreaskaris
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Correctly handle errors from parsing exclude ranges to avoid issues with nil pointer exceptions.
Parse single IP addresses such as 192.168.123.10 or fe02::10 by and convert them to CIDRs by appending the correct
prefix.

Fixes #364

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Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
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Correctly handle errors from parsing exclude ranges to avoid issues with
nil pointer exceptions.
Parse single IP addresses such as 192.168.123.10 or fe02::10 and
convert them to CIDRs by appending the correct prefix.

Signed-off-by: Andreas Karis <ak.karis@gmail.com>
if ip.To4() != nil {
_, subnet, err = net.ParseCIDR(fmt.Sprintf("%s/32", s))
} else {
_, subnet, err = net.ParseCIDR(fmt.Sprintf("%s/128", s))
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Yep, I'm into this approach of adding the suffix if it's a single IP, nice call

@dougbtv dougbtv merged commit 23e6020 into k8snetworkplumbingwg:master Jul 21, 2023
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[BUG] exclude range currently does not correctly handle invalid syntax
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