feat: support radiusDefaultOrganization in app.conf

Author: hsluoyz

conf/app.conf

@@ -28,6 +28,7 @@ ldapServerPort = 389
 ldapsCertId = ""
 ldapsServerPort = 636
 radiusServerPort = 1812
+radiusDefaultOrganization = "built-in"
 radiusSecret = "secret"
 quota = {"organization": -1, "user": -1, "application": -1, "provider": -1}
 logConfig = {"filename": "logs/casdoor.log", "maxdays":99999, "perm":"0770"}

radius/server.go

@@ -68,8 +68,10 @@ func handleAccessRequest(w radius.ResponseWriter, r *radius.Request) {
 	log.Printf("handleAccessRequest() username=%v, org=%v, password=%v", username, organization, password)
 
 	if organization == "" {
-		w.Write(r.Response(radius.CodeAccessReject))
-		return
+		organization = conf.GetConfigString("radiusDefaultOrganization")
+		if organization == "" {
+			organization = "built-in"
+		}
 	}
 
 	var user *object.User