mirror of https://github.com/chaos-mesh/chaosd.git
77 lines
1.8 KiB
Go
77 lines
1.8 KiB
Go
// Copyright 2020 Chaos Mesh Authors.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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// See the License for the specific language governing permissions and
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// limitations under the License.
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package utils
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import (
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"net"
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"strings"
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)
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// IPToCidr converts from an ip to a full mask cidr
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func IPToCidr(ip string) string {
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// TODO: support IPv6 correctly
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// distinguish is IPv4 or IPv6 address
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// no error checking here!
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if net.ParseIP(ip).To4() != nil {
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return ip + "/32"
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}
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return ip + "/128"
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}
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// ResolveCidrs converts multiple cidrs/ips/domains into cidr
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func ResolveCidrs(names []string) ([]string, error) {
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cidrs := []string{}
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for _, target := range names {
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// TODO: resolve ip on every pods but not in controller, in case the dns server of these pods differ
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cidr, err := ResolveCidr(target)
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if err != nil {
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return nil, 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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// ResolveCidr converts cidr/ip/domain into cidr
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func ResolveCidr(name string) ([]string, error) {
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_, ipnet, err := net.ParseCIDR(name)
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if err == nil {
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return []string{ipnet.String()}, nil
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}
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// name is not CIDR, check if it is invalid IP address
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if net.ParseIP(name) != nil {
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return []string{IPToCidr(name)}, nil
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}
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addrs, err := net.LookupIP(name)
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if err != nil {
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return nil, err
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}
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cidrs := []string{}
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for _, addr := range addrs {
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addr := addr.String()
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// TODO: support IPv6
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if strings.Contains(addr, ".") {
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cidrs = append(cidrs, IPToCidr(addr))
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}
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}
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return cidrs, nil
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}
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