Increased default value for TCP_MSS to 536, updated default value for TCP_WND to 4*TCP_MSS to keep delayed ACK working.

CHANGELOG

@@ -46,6 +46,10 @@ HISTORY
 
   ++ Bugfixes:
 
+  2009-10-30: Simon Goldschmidt
+  * opt.h: Increased default value for TCP_MSS to 536, updated default
+    value for TCP_WND to 4*TCP_MSS to keep delayed ACK working.
+
   2009-10-28: Kieran Mansley
   * tcp_in.c, tcp_out.c, tcp.h: re-work the fast retransmission code
     to follow algorithm from TCP/IP Illustrated

src/include/lwip/opt.h

@@ -759,7 +759,7 @@
  * (2 * TCP_MSS) for things to work well
  */
 #ifndef TCP_WND
-#define TCP_WND                         2048
+#define TCP_WND                         (4 * TCP_MSS)
 #endif 
 
 /**
@@ -785,14 +785,14 @@
 #endif
 
 /**
- * TCP_MSS: TCP Maximum segment size. (default is 128, a *very*
- * conservative default.)
+ * TCP_MSS: TCP Maximum segment size. (default is 536, a conservative default,
+ * you might want to increase this.)
  * For the receive side, this MSS is advertised to the remote side
  * when opening a connection. For the transmit size, this MSS sets
  * an upper limit on the MSS advertised by the remote host.
  */
 #ifndef TCP_MSS
-#define TCP_MSS                         128
+#define TCP_MSS                         536
 #endif
 
 /**