Merge pull request #726 from pritamp17/issue_705

Port Scanner in Go

Author: HarshCasper

Go/port-scanner-go/Readme.md

@@ -0,0 +1,25 @@
+# Port scanner in Go
+Go-lang script for scanning specific or all open ports of the device.
+# Packages Used
+- fmt
+- time
+- sync
+- strings
+- net
+
+# How to run
+Navigate to the project directory.
+```bash
+cd Rotten-Scripts/Go/port-scanner-go
+```
+```bash
+go run port_scanner.go 
+```
+## Output
+
+![](https://i.imgur.com/xMil1Kh.jpg)
+![](https://i.imgur.com/VEQPbz3.jpg)
+![](https://i.imgur.com/tMiEYNk.jpg)
+
+## Author
+- [Pritam Pawar](https://github.com/pritamp17)

Go/port-scanner-go/port_scanner.go

@@ -0,0 +1,72 @@
+package main
+
+import (
+    "fmt"
+    "net"
+    "time"
+    "sync"
+    "strings"
+
+)
+
+
+var wg sync.WaitGroup
+func main() {
+
+    var option int
+    var ip string
+    fmt.Print("[+] Enter IP address to scan: ")
+    fmt.Scan( & ip)
+
+    var typeOfPort string
+    fmt.Print("[+] Enter type of port you want to scan for eg(tcp,udp..etc): ")
+    fmt.Scan( & typeOfPort)
+
+    fmt.Print("[+] For scanning all open ports press : 1 \n[+]For scanning Specific ports press :2 \n")
+    fmt.Scan( & option)
+    if option == 1 {
+        scanAllPorts(ip, typeOfPort)
+    } else if option == 2 {
+        scanSelectedPorts(ip, typeOfPort)
+    } else {
+        fmt.Println("Please chose valid option")
+    }
+}
+
+// function for scanning all Ports
+func scanAllPorts(ip string, typeOfPort string) {
+        wg.Add(65535)
+        for port: = 1;
+        port < 65535;
+        port++{
+            hostIp: = fmt.Sprintf("%s:%d", ip, port)
+                // fmt.Println(hostIp)
+
+                _,
+            err: = net.DialTimeout(typeOfPort, hostIp, 10 * time.Millisecond)
+
+            if err == nil {
+                fmt.Printf("Port %d is open \n", port)
+            }
+        }
+        wg.Wait()
+
+        wg.Done()
+    }
+    // function for scanning specific Ports
+func scanSelectedPorts(ip string, typeOfPort string) {
+    var portsInput string
+    fmt.Print("[+] Enter Ports to scan: ")
+    fmt.Scan( & portsInput)
+    ports: = strings.Split(portsInput, ",")
+    for _, port: = range ports {
+        hostIp: = fmt.Sprintf("%s:%s", ip, port)
+        _,
+        err: = net.DialTimeout(typeOfPort, hostIp, 80 * time.Millisecond)
+        if err != nil {
+            fmt.Printf("Port %s is closed \n", port)
+        } else {
+            fmt.Printf("Port %s is open \n", port)
+        }
+    }
+}