Go語言實(shí)現(xiàn)的簡單網(wǎng)絡(luò)端口掃描方法

2020-04-01 19:21:11

字體：大中小

供稿：網(wǎng)友

這篇文章主要介紹了Go語言實(shí)現(xiàn)的簡單網(wǎng)絡(luò)端口掃描方法,實(shí)例分析了Go語言網(wǎng)絡(luò)程序的實(shí)現(xiàn)技巧,具有一定參考借鑒價(jià)值,需要的朋友可以參考下

本文實(shí)例講述了Go語言實(shí)現(xiàn)的簡單網(wǎng)絡(luò)端口掃描方法。分享給大家供大家參考。具體實(shí)現(xiàn)方法如下：

復(fù)制代碼代碼如下:

package main
import (
"net"
"fmt"
"os"
"runtime"
"time"
"strconv"
)

func loop(startport, endport int, inport chan int) {
  for i := startport; i <= endport; i++{
   inport <- i
  }
}

func scanner(inport, outport, out chan int, ip net.IP, endport int){
for{
  in := <- inport
  //fmt.Println(in)
  tcpaddr := &net.TCPAddr{ip,in}
  conn, err := net.DialTCP("tcp", nil, tcpaddr)
  if err != nil {
   outport <- 0
  }else{
   outport <- in
  }
  conn.Close()
  if in == endport{
   out <- in
  }
}
}

func main() {
starttime := time.Now().Unix()
runtime.GOMAXPROCS(4)
inport := make(chan int)
outport := make(chan int)
out := make(chan int)
collect := []int{}
if len(os.Args) != 4 {
  fmt.Println("Usage: scanner.exe IP startport endport")
  fmt.Println("Endport must be larger than startport")
  os.Exit(0)
}
ip := net.ParseIP(os.Args[1])
if(os.Args[3] < os.Args[2]) {
  fmt.Println("Usage: scanner IP startport endport")
  fmt.Println("Endport must be larger than startport")
  os.Exit(0)
}
startport, _:= strconv.Atoi(os.Args[2])
endport, _ := strconv.Atoi(os.Args[3])
go loop(startport, endport, inport)
for{
  select {
   case <-out:
    fmt.Println(collect)
    endtime := time.Now().Unix()
    fmt.Println("The scan process has spent ",endtime-starttime,"second")
    os.Exit(0)
   default:
    go scanner(inport, outport, out, ip, endport)
    port := <- outport

    if port != 0{
     collect = append(collect, port)
    }
  }
}
}