Disable ssh port forwarding when value of -ssh-port is -1

Signed-off-by: Gunjan Vyas <[email protected]>

cmd/gvproxy/main.go

@@ -167,7 +167,7 @@ func main() {
 
 	// If the given port is not between the privileged ports
 	// and the oft considered maximum port, return an error.
-	if sshPort < 1024 || sshPort > 65535 {
+	if sshPort != -1 && sshPort < 1024 || sshPort > 65535 {
 		exitWithError(errors.New("ssh-port value must be between 1024 and 65535"))
 	}
 	protocol := types.HyperKitProtocol
@@ -250,9 +250,7 @@ func main() {
 			},
 		},
 		DNSSearchDomains: searchDomains(),
-		Forwards: map[string]string{
-			fmt.Sprintf("127.0.0.1:%d", sshPort): sshHostPort,
-		},
+		Forwards:         getForwardsMap(sshPort, sshHostPort),
 		NAT: map[string]string{
 			hostIP: "127.0.0.1",
 		},
@@ -285,6 +283,15 @@ func main() {
 	}
 }
 
+func getForwardsMap(sshPort int, sshHostPort string) map[string]string {
+	if sshPort == -1 {
+		return map[string]string{}
+	}
+	return map[string]string{
+		fmt.Sprintf("127.0.0.1:%d", sshPort): sshHostPort,
+	}
+}
+
 type arrayFlags []string
 
 func (i *arrayFlags) String() string {