GOLANG 連接埠掃描樣本

這是一個建立於 的文章，其中的資訊可能已經有所發展或是發生改變。

這段代碼主要來自網路，原始碼存在問題，現在已經修複，可以直接編譯運行

package mainimport ("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 := <- inporttcpaddr := &net.TCPAddr{IP:ip,Port: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() {runtime.GOMAXPROCS(4)inport := make(chan int)starttime := time.Now().Unix()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)}fmt.Printf("the ip is %s \r\n",ip)startport, _:= strconv.Atoi(os.Args[2])endport, _ := strconv.Atoi(os.Args[3])fmt.Printf("%d---------%d\r\n",startport,endport)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 := <- outportif port != 0{collect = append(collect, port)}}}}