--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/seobeo/s_websocket_common.c	Thu Jan 08 08:46:49 2026 -0800
@@ -0,0 +1,23 @@
+#include "seobeo/seobeo.h"
+#include "seobeo/seobeo_internal.h"
+
+// Mask/unmask data with XOR operation (same for both directions)
+void Seobeo_WebSocket_Mask_Data(uint8 *data, size_t length, const uint8 *mask)
+{
+  for (size_t i = 0; i < length; i++)
+  {
+    data[i] ^= mask[i % 4];
+  }
+}
+
+// Destroy a WebSocket message
+void Seobeo_WebSocket_Message_Destroy(Seobeo_WebSocket_Message *p_msg)
+{
+  if (!p_msg)
+    return;
+
+  if (p_msg->data)
+    free(p_msg->data);
+
+  free(p_msg);
+}