kubernetes/vendor/k8s.io/utils/net/net.go

// ParseCIDRs parses a list of cidrs and return error if any is invalid.
// order is maintained
func ParseCIDRs(cidrsString []string) ([]*net.IPNet, error) { … }

// ParsePort parses a string representing an IP port.  If the string is not a
// valid port number, this returns an error.
func ParsePort(port string, allowZero bool) (int, error) { … }

// BigForIP creates a big.Int based on the provided net.IP
func BigForIP(ip net.IP) *big.Int { … }

// AddIPOffset adds the provided integer offset to a base big.Int representing a net.IP
// NOTE: If you started with a v4 address and overflow it, you get a v6 result.
func AddIPOffset(base *big.Int, offset int) net.IP { … }

// RangeSize returns the size of a range in valid addresses.
// returns the size of the subnet (or math.MaxInt64 if the range size would overflow int64)
func RangeSize(subnet *net.IPNet) int64 { … }

// GetIndexedIP returns a net.IP that is subnet.IP + index in the contiguous IP space.
func GetIndexedIP(subnet *net.IPNet, index int) (net.IP, error) { … }