ike-init: Send REDIRECT_SUPPORTED as initiator

src/libcharon/sa/ikev2/tasks/ike_init.c

@@ -324,6 +324,11 @@ static bool build_payloads(private_ike_init_t *this, message_t *message)
 			send_supported_hash_algorithms(this, message);
 		}
 	}
+	/* notify other peer if we support redirection */
+	if (!this->old_sa && this->initiator)
+	{
+		message->add_notify(message, FALSE, REDIRECT_SUPPORTED, chunk_empty);
+	}
 	return TRUE;
 }