diff --git a/mioctl.c b/mioctl.c
new file mode 100644
index 0000000..f2ba168
--- /dev/null
+++ b/mioctl.c
@@ -0,0 +1,46 @@
+#include "marignotti.h"
+#include <gno/kerntool.h>
+#include <errno.h>
+
+#include <sys/ioctl.h>
+
+#pragma noroot
+#pragma optimize 79
+
+int mioctl(Entry *e, void *p1, void *p2, void *p3, void *p4, void *p5)
+{
+    Word t;
+    Word terr;
+    
+    LongWord tioc = *(LongWord *)p1;
+    void *data = (void *)p3;
+    
+    if (tioc == FIONREAD)
+    {
+        // return # of bytes available 
+        IncBusy();
+        terr = TCPIPStatusTCP(e->ipid, &e->sr);
+        t = _toolErr;
+        DecBusy();
+        if (t) terr = t;
+        
+        if (data) *(Word *)data = e->sr.srRcvQueued;
+        
+        return 0;
+    }
+    
+    if (tioc == FIONBIO)
+    {
+        // set/clear non-blocking io.
+        int tmp;
+        
+        tmp = data ? *(int *)data : 0;
+        e->_NONBLOCK = tmp ? 1 : 0;
+        return 0;
+    }
+    
+    // SIOCSHIWAT / SIOCGHIWAT ?
+    // SIOCSLOWAT / SIOCGLOWAT ?
+    
+    return EINVAL;
+}
\ No newline at end of file