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53 lines
1.2 KiB
53 lines
1.2 KiB
// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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//
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package gipv4
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import (
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"net"
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"strings"
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)
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// GetHostByName returns the IPv4 address corresponding to a given Internet host name.
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func GetHostByName(hostname string) (string, error) {
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ips, err := net.LookupIP(hostname)
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if ips != nil {
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for _, v := range ips {
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if v.To4() != nil {
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return v.String(), nil
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}
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}
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return "", nil
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}
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return "", err
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}
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// GetHostsByName returns a list of IPv4 addresses corresponding to a given Internet
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// host name.
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func GetHostsByName(hostname string) ([]string, error) {
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ips, err := net.LookupIP(hostname)
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if ips != nil {
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var ipStrings []string
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for _, v := range ips {
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if v.To4() != nil {
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ipStrings = append(ipStrings, v.String())
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}
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}
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return ipStrings, nil
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}
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return nil, err
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}
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// GetNameByAddr returns the Internet host name corresponding to a given IP address.
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func GetNameByAddr(ipAddress string) (string, error) {
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names, err := net.LookupAddr(ipAddress)
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if names != nil {
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return strings.TrimRight(names[0], "."), nil
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}
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return "", err
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}
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