這篇文章為大家帶來了關於Go的相關知識,其中主要跟大家介紹Go怎麼實現端口掃描器,有代碼示例,感興趣的朋友下面一起來看一下吧,希望對大家有幫助。
利用GO 批次掃描伺服器連接埠
package mainimport ( "fmt" "net" "time" "unsafe")func main() { tcpScan("127.0.0.1", 1, 65535)}func tcpScan(ip string, portStart int, portEnd int) { start := time.Now() // 参数校验 isok := verifyParam(ip, portStart, portEnd) if isok == false { fmt.Printf("[Exit]\n") } for i := portStart; i <= portEnd; i++ { address := fmt.Sprintf("%s:%d", ip, i) conn, err := net.Dial("tcp", address) if err != nil { fmt.Printf("[info] %s Close \n", address) continue } conn.Close() fmt.Printf("[info] %s Open \n", address) } cost := time.Since(start) fmt.Printf("[tcpScan] cost %s second \n", cost)}func verifyParam(ip string, portStart int, portEnd int) bool { netip := net.ParseIP(ip) if netip == nil { fmt.Println("[Error] ip type is must net.ip") return false } fmt.Printf("[Info] ip=%s | ip type is: %T | ip size is: %d \n", netip, netip, unsafe.Sizeof(netip)) if portStart < 1 || portEnd > 65535 { fmt.Println("[Error] port is must in the range of 1~65535") return false } fmt.Printf("[Info] port start:%d end:%d \n", portStart, portEnd) return true}
package mainimport ( "fmt" "net" "sync" "time" "unsafe")func main() { tcpScanByGoroutine("127.0.0.1", 1, 65535)}func tcpScanByGoroutine(ip string, portStart int, portEnd int) { start := time.Now() // 参数校验 isok := verifyParam(ip, portStart, portEnd) if isok == false { fmt.Printf("[Exit]\n") } var wg sync.WaitGroup for i := portStart; i <= portEnd; i++ { wg.Add(1) go func(j int) { defer wg.Done() address := fmt.Sprintf("%s:%d", ip, j) conn, err := net.Dial("tcp", address) if err != nil { fmt.Printf("[info] %s Close \n", address) return } conn.Close() fmt.Printf("[info] %s Open \n", address) }(i) } wg.Wait() cost := time.Since(start) fmt.Printf("[tcpScanByGoroutine] cost %s second \n", cost)}func verifyParam(ip string, portStart int, portEnd int) bool { netip := net.ParseIP(ip) if netip == nil { fmt.Println("[Error] ip type is must net.ip") return false } fmt.Printf("[Info] ip=%s | ip type is: %T | ip size is: %d \n", netip, netip, unsafe.Sizeof(netip)) if portStart < 1 || portEnd > 65535 { fmt.Println("[Error] port is must in the range of 1~65535") return false } fmt.Printf("[Info] port start:%d end:%d \n", portStart, portEnd) return true}
package mainimport ( "fmt" "net" "sync" "time" "unsafe")func main() { tcpScanByGoroutineWithChannel("127.0.0.1", 1, 65535)}func handleWorker(ip string, ports chan int, wg *sync.WaitGroup) { for p := range ports { address := fmt.Sprintf("%s:%d", ip, p) conn, err := net.Dial("tcp", address) if err != nil { fmt.Printf("[info] %s Close \n", address) wg.Done() continue } conn.Close() fmt.Printf("[info] %s Open \n", address) wg.Done() }}func tcpScanByGoroutineWithChannel(ip string, portStart int, portEnd int) { start := time.Now() // 参数校验 isok := verifyParam(ip, portStart, portEnd) if isok == false { fmt.Printf("[Exit]\n") } ports := make(chan int, 100) var wg sync.WaitGroup for i := 0; i < cap(ports); i++ { go handleWorker(ip, ports, &wg) } for i := portStart; i <= portEnd; i++ { wg.Add(1) ports <- i } wg.Wait() close(ports) cost := time.Since(start) fmt.Printf("[tcpScanByGoroutineWithChannel] cost %s second \n", cost)}func verifyParam(ip string, portStart int, portEnd int) bool { netip := net.ParseIP(ip) if netip == nil { fmt.Println("[Error] ip type is must net.ip") return false } fmt.Printf("[Info] ip=%s | ip type is: %T | ip size is: %d \n", netip, netip, unsafe.Sizeof(netip)) if portStart < 1 || portEnd > 65535 { fmt.Println("[Error] port is must in the range of 1~65535") return false } fmt.Printf("[Info] port start:%d end:%d \n", portStart, portEnd) return true}
// packagepackage mainimport ( "fmt" "net" "sort" "time" "unsafe")func main() { tcpScanByGoroutineWithChannelAndSort("127.0.0.1", 1, 65535)}// The function handles checking if ports are open or closed for a given IP address.func handleWorker(ip string, ports chan int, results chan int) { for p := range ports { address := fmt.Sprintf("%s:%d", ip, p) conn, err := net.Dial("tcp", address) if err != nil { // fmt.Printf("[debug] ip %s Close \n", address) results <- (-p) continue } // fmt.Printf("[debug] ip %s Open \n", address) conn.Close() results <- p }}func tcpScanByGoroutineWithChannelAndSort(ip string, portStart int, portEnd int) { start := time.Now() // 参数校验 isok := verifyParam(ip, portStart, portEnd) if isok == false { fmt.Printf("[Exit]\n") } ports := make(chan int, 50) results := make(chan int) var openSlice []int var closeSlice []int // 任务生产者-分发任务 (新起一个 goroutinue ,进行分发数据) go func(a int, b int) { for i := a; i <= b; i++ { ports <- i } }(portStart, portEnd) // 任务消费者-处理任务 (每一个端口号都分配一个 goroutinue ,进行扫描) // 结果生产者-每次得到结果 再写入 结果 chan 中 for i := 0; i < cap(ports); i++ { go handleWorker(ip, ports, results) } // 结果消费者-等待收集结果 (main中的 goroutinue 不断从 chan 中阻塞式读取数据) for i := portStart; i <= portEnd; i++ { resPort := <-results if resPort > 0 { openSlice = append(openSlice, resPort) } else { closeSlice = append(closeSlice, -resPort) } } // 关闭 chan close(ports) close(results) // 排序 sort.Ints(openSlice) sort.Ints(closeSlice) // 输出 for _, p := range openSlice { fmt.Printf("[info] %s:%-8d Open\n", ip, p) } // for _, p := range closeSlice { // fmt.Printf("[info] %s:%-8d Close\n", ip, p) // } cost := time.Since(start) fmt.Printf("[tcpScanByGoroutineWithChannelAndSort] cost %s second \n", cost)}func verifyParam(ip string, portStart int, portEnd int) bool { netip := net.ParseIP(ip) if netip == nil { fmt.Println("[Error] ip type is must net.ip") return false } fmt.Printf("[Info] ip=%s | ip type is: %T | ip size is: %d \n", netip, netip, unsafe.Sizeof(netip)) if portStart < 1 || portEnd > 65535 { fmt.Println("[Error] port is must in the range of 1~65535") return false } fmt.Printf("[Info] port start:%d end:%d \n", portStart, portEnd) return true}
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