81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
// Licensed to Elasticsearch B.V. under one or more contributor
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// license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright
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// ownership. Elasticsearch B.V. licenses this file to you under
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// the Apache License, Version 2.0 (the "License"); you may
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// 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,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package common
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import (
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"fmt"
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"net"
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)
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// LocalIPAddrs finds the IP addresses of the hosts on which
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// the shipper currently runs on.
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func LocalIPAddrs() ([]net.IP, error) {
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var localIPAddrs []net.IP
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ipaddrs, err := net.InterfaceAddrs()
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if err != nil {
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return nil, err
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}
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for _, addr := range ipaddrs {
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var ip net.IP
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ok := true
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switch v := addr.(type) {
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case *net.IPNet:
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ip = v.IP
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case *net.IPAddr:
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ip = v.IP
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default:
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ok = false
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}
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if !ok {
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continue
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}
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localIPAddrs = append(localIPAddrs, ip)
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}
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return localIPAddrs, nil
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}
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// LocalIPAddrsAsStrings finds the IP addresses of the hosts on which
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// the shipper currently runs on and returns them as an array of
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// strings.
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func LocalIPAddrsAsStrings(includeLoopbacks bool) ([]string, error) {
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var localIPAddrsStrings = []string{}
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var err error
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ipaddrs, err := LocalIPAddrs()
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if err != nil {
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return []string{}, err
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}
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for _, ipaddr := range ipaddrs {
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if includeLoopbacks || !ipaddr.IsLoopback() {
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localIPAddrsStrings = append(localIPAddrsStrings, ipaddr.String())
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}
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}
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return localIPAddrsStrings, err
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}
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// IsLoopback check if a particular IP notation corresponds
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// to a loopback interface.
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func IsLoopback(ipStr string) (bool, error) {
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ip := net.ParseIP(ipStr)
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if ip == nil {
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return false, fmt.Errorf("Wrong IP format %s", ipStr)
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}
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return ip.IsLoopback(), nil
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}
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