Adding get public ip helper

dsl.go

@@ -1027,6 +1027,15 @@ func init() {
 
 			return result, nil
 		}))
+	MustAddFunction(NewWithSingleSignature("public_ip",
+		"() string",
+		func(args ...interface{}) (interface{}, error) {
+			publicIP := GetPublicIP()
+			if publicIP == "" {
+				return nil, errors.New("could not retrieve public ip")
+			}
+			return publicIP, nil
+		}))
 
 	DefaultHelperFunctions = HelperFunctions()
 	FunctionNames = GetFunctionNames(DefaultHelperFunctions)

dsl_test.go

@@ -126,6 +126,7 @@ func TestGetPrintableDslFunctionSignatures(t *testing.T) {
 	mmh3(arg1 interface{}) interface{}
 	oct_to_dec(arg1 interface{}) interface{}
 	print_debug(args ...interface{})
+	public_ip() string
 	rand_base(length uint, optionalCharSet string) string
 	rand_char(optionalCharSet string) string
 	rand_int(optionalMin, optionalMax uint) int

public_ip.go

@@ -0,0 +1,20 @@
+package dsl
+
+import (
+	"sync"
+
+	iputil "github.com/projectdiscovery/utils/ip"
+)
+
+var (
+	publicIP string
+	getOnce  sync.Once
+)
+
+// GetPublicIp of the host
+func GetPublicIP() string {
+	getOnce.Do(func() {
+		publicIP, _ = iputil.WhatsMyIP()
+	})
+	return publicIP
+}