kubernetes/third_party/forked/golang/net/dnsclient.go

// Reverseaddr returns the in-addr.arpa. or ip6.arpa. hostname of the IP
// address addr suitable for rDNS (PTR) record lookup or an error if it fails
// to parse the IP address.
func Reverseaddr(addr string) (arpa string, err error) { … }

// Convert unsigned integer to decimal string.
func uitoa(val uint) string { … }

const hexDigit …