+/**
+ * Flag for csp->flags: Set the client IP has appended to
+ * an already existing X-Forwarded-For header in which case
+ * no new header has to be generated.
+ */
+#define CSP_FLAG_X_FORWARDED_FOR_APPENDED 0x00000800UL
+
+/**
+ * Flag for csp->flags: Set if the server wants to keep
+ * the connection alive.
+ *
+ * XXX: Incomplete implementation, we currently only
+ * look for "Connection: keep-alive".
+ */
+#define CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE 0x00001000UL
+
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+/**
+ * Flag for csp->flags: Set if the server specified the
+ * content length.
+ */
+#define CSP_FLAG_CONTENT_LENGTH_SET 0x00002000UL
+#endif /* def FEATURE_CONNECTION_KEEP_ALIVE */