moved websocket_frame to implementation details

Author: pfeatherstone

src/http.cpp

@@ -1401,6 +1401,21 @@ namespace http
         serialize_header_final(resp, status_str, buf);
     }
 
+//----------------------------------------------------------------------------------------------------------------
+
+    struct websocket_frame
+    {
+        unsigned char opcode : 4;
+        unsigned char rsv3   : 1;
+        unsigned char rsv2   : 1;
+        unsigned char rsv1   : 1;
+        unsigned char fin    : 1;
+        unsigned char paylen : 7;
+        unsigned char masked : 1;
+    };
+
+    static_assert(sizeof(websocket_frame) == 2, "bad");
+
 //----------------------------------------------------------------------------------------------------------------
 
     bool websocket_parser::parse(std::vector<char>& msg, std::string& buf, std::error_code& ec)

src/http.h

@@ -605,21 +605,6 @@ namespace http
         WS_OPCODE_PONG          = 10
     };
 
-//----------------------------------------------------------------------------------------------------------------
-
-    struct websocket_frame
-    {
-        unsigned char opcode : 4;
-        unsigned char rsv3   : 1;
-        unsigned char rsv2   : 1;
-        unsigned char rsv1   : 1;
-        unsigned char fin    : 1;
-        unsigned char paylen : 7;
-        unsigned char masked : 1;
-    };
-
-    static_assert(sizeof(websocket_frame) == 2, "bad");
-
 //----------------------------------------------------------------------------------------------------------------
 
     class websocket_parser