网络端口扫描器代码,GO代码库,德仔网

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【GO】网络端口扫描器

作者:余风11 / 发布于2014/4/10/ 359

网络端口扫描器

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)
        }
    }   
  }
}

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