rebase: update to latest github.com/openshift/api version

Also vendor all dependencies.

Signed-off-by: Niels de Vos <ndevos@ibm.com>

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

@@ -0,0 +1,91 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package net
+
+import (
+	"errors"
+	"fmt"
+	"math"
+	"math/big"
+	"net"
+	"strconv"
+)
+
+// ParseCIDRs parses a list of cidrs and return error if any is invalid.
+// order is maintained
+func ParseCIDRs(cidrsString []string) ([]*net.IPNet, error) {
+	cidrs := make([]*net.IPNet, 0, len(cidrsString))
+	for i, cidrString := range cidrsString {
+		_, cidr, err := ParseCIDRSloppy(cidrString)
+		if err != nil {
+			return nil, fmt.Errorf("invalid CIDR[%d]: %v (%v)", i, cidr, err)
+		}
+		cidrs = append(cidrs, cidr)
+	}
+	return cidrs, nil
+}
+
+// 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) {
+	portInt, err := strconv.ParseUint(port, 10, 16)
+	if err != nil {
+		return 0, err
+	}
+	if portInt == 0 && !allowZero {
+		return 0, errors.New("0 is not a valid port number")
+	}
+	return int(portInt), nil
+}
+
+// BigForIP creates a big.Int based on the provided net.IP
+func BigForIP(ip net.IP) *big.Int {
+	// NOTE: Convert to 16-byte representation so we can
+	// handle v4 and v6 values the same way.
+	return big.NewInt(0).SetBytes(ip.To16())
+}
+
+// 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 {
+	r := big.NewInt(0).Add(base, big.NewInt(int64(offset))).Bytes()
+	r = append(make([]byte, 16), r...)
+	return net.IP(r[len(r)-16:])
+}
+
+// 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 {
+	ones, bits := subnet.Mask.Size()
+	if bits == 32 && (bits-ones) >= 31 || bits == 128 && (bits-ones) >= 127 {
+		return 0
+	}
+	// this checks that we are not overflowing an int64
+	if bits-ones >= 63 {
+		return math.MaxInt64
+	}
+	return int64(1) << uint(bits-ones)
+}
+
+// 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) {
+	ip := AddIPOffset(BigForIP(subnet.IP), index)
+	if !subnet.Contains(ip) {
+		return nil, fmt.Errorf("can't generate IP with index %d from subnet. subnet too small. subnet: %q", index, subnet)
+	}
+	return ip, nil
+}