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[engine-1.21] Add functions to separate ipv4 from ipv6 functions #3929

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Aug 27, 2021
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[engine-1.21] Add functions to separate ipv4 from ipv6 functions #3929

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22 changes: 22 additions & 0 deletions pkg/util/net.go
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Original file line number Diff line number Diff line change
Expand Up @@ -63,3 +63,25 @@ func GetFirst4String(elems []string) (string, error) {
}
return ip.String(), nil
}

// JoinIP4Nets stringifies and joins a list of IPv4 networks with commas.
func JoinIP4Nets(elems []*net.IPNet) string {
var strs []string
for _, elem := range elems {
if elem != nil && elem.IP.To4() != nil {
strs = append(strs, elem.String())
}
}
return strings.Join(strs, ",")
}

// JoinIP6Nets stringifies and joins a list of IPv6 networks with commas.
func JoinIP6Nets(elems []*net.IPNet) string {
var strs []string
for _, elem := range elems {
if elem != nil && elem.IP.To4() == nil {
strs = append(strs, elem.String())
}
}
return strings.Join(strs, ",")
}