1 files changed, 58 insertions, 0 deletions

diff --git a/src/microhttpd/internal.h b/src/microhttpd/internal.h
index 346001c3..e684aa88 100644
--- a/src/microhttpd/internal.h
+++ b/src/microhttpd/internal.h
@@ -732,6 +732,59 @@ enum MHD_ConnKeepAlive
   MHD_CONN_USE_KEEPALIVE = 1
 };
 
+enum MHD_HTTP_version
+{
+  /**
+   * Not a HTTP protocol or HTTP version is invalid.
+   */
+  MHD_HTTP_VER_INVALID = -1,
+
+  /**
+   * HTTP version is not yet received from the client.
+   */
+  MHD_HTTP_VER_UNKNOWN = 0,
+
+  /**
+   * HTTP version before 1.0, unsupported.
+   */
+  MHD_HTTP_VER_TOO_OLD = 1,
+
+  /**
+   * HTTP version 1.0
+   */
+  MHD_HTTP_VER_1_0 = 2,
+
+  /**
+   * HTTP version 1.1
+   */
+  MHD_HTTP_VER_1_1 = 3,
+
+  /**
+   * HTTP version 1.2-1.9, must be used as 1.1
+   */
+  MHD_HTTP_VER_1_2__1_9 = 4,
+
+  /**
+   * HTTP future version. Unsupported.
+   * Reserved, not really detected.
+   */
+  MHD_HTTP_VER_FUTURE = 100
+};
+
+/**
+ * Returns boolean 'true' if HTTP version is supported by MHD
+ */
+#define MHD_IS_HTTP_VER_SUPPORTED(ver) (MHD_HTTP_VER_1_0 <= (ver) && \
+    MHD_HTTP_VER_1_2__1_9 >= (ver))
+
+/**
+ * Protocol should be used as HTTP/1.1 protocol.
+ *
+ * See the last paragraph of
+ * https://datatracker.ietf.org/doc/html/rfc7230#section-2.6
+ */
+#define MHD_IS_HTTP_VER_1_1_COMPAT(ver) (MHD_HTTP_VER_1_1 == (ver) || \
+    MHD_HTTP_VER_1_2__1_9 == (ver))
 
 /**
  * State kept for each HTTP request.
@@ -840,6 +893,11 @@ struct MHD_Connection
   char *version;
 
   /**
+   * HTTP protocol version as enum.
+   */
+  enum MHD_HTTP_version http_ver;
+
+  /**
    * Close connection after sending response?
    * Functions may change value from "Unknown" or "KeepAlive" to "Must close",
    * but no functions reset value "Must Close" to any other value.