mirror of
https://github.com/ceph/ceph-csi.git
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e32b649648
Adding extenal-provisoner will help us to test snapshot functionality Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
135 lines
3.1 KiB
Go
135 lines
3.1 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package net
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import (
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"fmt"
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"net"
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)
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// ParseCIDRs parses a list of cidrs and return error if any is invalid.
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// order is maintained
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func ParseCIDRs(cidrsString []string) ([]*net.IPNet, error) {
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cidrs := make([]*net.IPNet, 0, len(cidrsString))
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for _, cidrString := range cidrsString {
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_, cidr, err := net.ParseCIDR(cidrString)
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if err != nil {
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return nil, fmt.Errorf("failed to parse cidr value:%q with error:%v", cidrString, err)
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}
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cidrs = append(cidrs, cidr)
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}
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return cidrs, nil
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}
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// IsDualStackIPs returns if a slice of ips is:
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// - all are valid ips
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// - at least one ip from each family (v4 or v6)
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func IsDualStackIPs(ips []net.IP) (bool, error) {
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v4Found := false
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v6Found := false
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for _, ip := range ips {
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if ip == nil {
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return false, fmt.Errorf("ip %v is invalid", ip)
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}
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if v4Found && v6Found {
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continue
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}
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if IsIPv6(ip) {
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v6Found = true
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continue
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}
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v4Found = true
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}
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return (v4Found && v6Found), nil
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}
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// IsDualStackIPStrings returns if
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// - all are valid ips
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// - at least one ip from each family (v4 or v6)
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func IsDualStackIPStrings(ips []string) (bool, error) {
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parsedIPs := make([]net.IP, 0, len(ips))
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for _, ip := range ips {
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parsedIP := net.ParseIP(ip)
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parsedIPs = append(parsedIPs, parsedIP)
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}
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return IsDualStackIPs(parsedIPs)
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}
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// IsDualStackCIDRs returns if
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// - all are valid cidrs
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// - at least one cidr from each family (v4 or v6)
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func IsDualStackCIDRs(cidrs []*net.IPNet) (bool, error) {
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v4Found := false
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v6Found := false
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for _, cidr := range cidrs {
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if cidr == nil {
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return false, fmt.Errorf("cidr %v is invalid", cidr)
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}
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if v4Found && v6Found {
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continue
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}
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if IsIPv6(cidr.IP) {
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v6Found = true
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continue
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}
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v4Found = true
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}
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return v4Found && v6Found, nil
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}
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// IsDualStackCIDRStrings returns if
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// - all are valid cidrs
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// - at least one cidr from each family (v4 or v6)
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func IsDualStackCIDRStrings(cidrs []string) (bool, error) {
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parsedCIDRs, err := ParseCIDRs(cidrs)
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if err != nil {
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return false, err
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}
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return IsDualStackCIDRs(parsedCIDRs)
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}
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// IsIPv6 returns if netIP is IPv6.
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func IsIPv6(netIP net.IP) bool {
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return netIP != nil && netIP.To4() == nil
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}
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// IsIPv6String returns if ip is IPv6.
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func IsIPv6String(ip string) bool {
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netIP := net.ParseIP(ip)
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return IsIPv6(netIP)
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}
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// IsIPv6CIDRString returns if cidr is IPv6.
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// This assumes cidr is a valid CIDR.
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func IsIPv6CIDRString(cidr string) bool {
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ip, _, _ := net.ParseCIDR(cidr)
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return IsIPv6(ip)
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}
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// IsIPv6CIDR returns if a cidr is ipv6
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func IsIPv6CIDR(cidr *net.IPNet) bool {
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ip := cidr.IP
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return IsIPv6(ip)
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}
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