wide/util/net.go

46 lines
1.1 KiB
Go

// Copyright (c) 2014-2016, b3log.org & hacpai.com
//
// 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 util includes common utilities.
package util
import (
"errors"
"net"
)
type mynet struct{}
// Network utilities.
var Net = mynet{}
// LocalIP gets the first NIC's IP address.
func (*mynet) LocalIP() (string, error) {
addrs, err := net.InterfaceAddrs()
if nil != err {
return "", err
}
for _, address := range addrs {
if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
if nil != ipnet.IP.To4() {
return ipnet.IP.String(), nil
}
}
}
return "", errors.New("can't get local IP")
}