A bit more of description

README.md

@@ -3,6 +3,12 @@ buggy_openssl_with_fullduplex
 
 Toy code which shows problems with non-blocking, fullduplex I/O & renegotiation in OpenSSL
 
+What is it:
+    This code shows that it is not possible to use SSL_write() and SSL_read() functions in the same
+    way as ::send() and ::recv().
+    The main difference between SSL_write/read functions and send/recv system calls is that
+    SSL_write function may in fact read data from the socket in some situations (similary
+    SSL_read may need to write data to the socket). 
 
 How it works:
 
@@ -35,4 +41,4 @@ How it works:
     TCP:
     In TCP exchange we can see that transfer between client & server is OK until
     client sends "Client Hello" packet. This packet is sent when SSL_renegotiate
-    is called
+    is called