golang检测ip,port

package main
import (
 "fmt"
 "net"
 "os/exec"
 "strconv"
 "strings"
)
func main() {
 err := CheckPorts("3306")
 if err != nil {
 fmt.Println("端口已存在")
 } else {
 fmt.Println("端口不存在")
 }
 // GetLocalIps()
}
//获取本机ip
func GetLocalIp() string {
 addrs, err := net.InterfaceAddrs()
 if err != nil {
 fmt.Println("get local ip failed")
 }
 for _, address := range addrs {
 if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
 if ipnet.IP.To4() != nil {
 return ipnet.IP.String()
 }
 }
 }
 return ""
}
//获取本机ip
func GetLocalIps() {
 interface_list, err := net.Interfaces()
 if err != nil {
 fmt.Println(err)
 return
 }
 var byName *net.Interface
 var addrList []net.Addr
 var oneAddrs []string
 for _, i := range interface_list {
 byName, err = net.InterfaceByName(i.Name)
 if err != nil {
 fmt.Println(err)
 return
 }
 addrList, err = byName.Addrs()
 if err != nil {
 fmt.Println(err)
 return
 }
 for _, oneAddr := range addrList {
 oneAddrs = strings.SplitN(oneAddr.String(), "/", 2)
 fmt.Println(i.Name, "-", oneAddrs[0])
 }
 }
}
func CheckPort(port int) error {
 checkStatement := fmt.Sprintf(`netstat -anp | grep -q %d ; echo $?`, port)
 output, err := exec.Command("sh", "-c", checkStatement).CombinedOutput()
 if err != nil {
 return err
 }
 fmt.Println(string(output))
 // log.Println(output, string(output)) ==> [48 10] 0 或 [49 10] 1
 result, err := strconv.Atoi(strings.TrimSuffix(string(output), "\n"))
 if err != nil {
 return err
 }
 if result == 0 {
 return fmt.Errorf("端口%d已被占用", port)
 }
 return nil
}
func CheckPorts(port string) error {
 var err error
 tcpAddress, err := net.ResolveTCPAddr("tcp4", ":"+port)
 if err != nil {
 return err
 }
 listener, err := net.ListenTCP("tcp", tcpAddress)
 if err != nil {
 return err
 } else {
 listener.Close()
 }
 return nil
}

本文来自:简书

感谢作者:成功的失败者

查看原文:golang检测ip,port

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