Go language RPC Authorization simple ip security verification method

This article illustrates a simple ip security verification method for Go language RPC Authorization. Share with you for your reference. The specific analysis is as follows:

To write a network service, always consider the security mechanism, ip and network segment to judge is the simplest 1 verification mechanism. After that, I want to make a security verification mechanism similar to the registration, which can not only reduce the trouble of configuration files, but also can be a good security management.

Direct access code:

package main

import(

    "net"

    "fmt"

    "time"

    "strings"

)

func main(){

    IP_ARRAY := "192.168.1.234,192.168.1.47,192.168.2.0/28"

    servPort:=":7272"

    l,err := net.Listen( "tcp",servPort )

    if err != nil {

        fmt.Printf( "Listen is error" )

        return

    }

    allowList :=strings.Split( IP_ARRAY,"," )

    for{ 

        conn,err:=l.Accept()

        if err != nil {

            fmt.Printf( "start connect  is error" )

            return

        }

        ipAddr:=conn.RemoteAddr()

        Addr := strings.Split( ipAddr.String(), ":")

        rAddr := net.ParseIP( Addr[0] )

        var authorized bool = false

        for v := range allowList{

            _,ipNet,err := net.ParseCIDR( allowList[v] )

            if err != nil{

                fmt.Printf( "parse ip net error" )

                ipHost := net.ParseIP( allowList[v])

                if ipHost != nil{

                   if ipHost.Equal( rAddr ) {

                      authorized =true

                   }

                }else{

                    fmt.Printf( "ip list error" )

                }

            }else{

                fmt.Printf( "Contains ip " )

                if ipNet.Contains( rAddr ) {

                    authorized =true

                }

            }

        }

        if authorized == true{ 

            curTime:=time.Now()

            fmt.Printf( curTime.Format( "2006-01-02 15:04:05" )  )

            conn.Write( []byte(curTime.Format( "2006-01-02 15:04:05" ) ) )

            time.Sleep( 10)

        }else{

            conn.Close()

        }

    }

}

I hope this article has been helpful to your programming of Go language.