From be766af0fbc223a0c575636e114c0bb9f1c8438c Mon Sep 17 00:00:00 2001
From: Stefan Lankes <lankes@lfbs.rwth-aachen.de>
Date: Sat, 3 Sep 2011 13:27:25 -0700
Subject: [PATCH] LwIP fine tuning

---
 lwip/src/include/arch/cc.h  |  2 +-
 lwip/src/include/lwipopts.h | 44 +++++++++++++++++++++++++++----------
 2 files changed, 33 insertions(+), 13 deletions(-)

diff --git a/lwip/src/include/arch/cc.h b/lwip/src/include/arch/cc.h
index 3474f573..392132bb 100644
--- a/lwip/src/include/arch/cc.h
+++ b/lwip/src/include/arch/cc.h
@@ -70,7 +70,7 @@ typedef size_t mem_ptr_t;
 #define MEM_ALIGNMENT 4
 #define ETH_PAD_SIZE  2
 
-#define LWIP_CHKSUM_ALGORITHM 2
+#define LWIP_CHKSUM_ALGORITHM	3
 
 /* prototypes for printf() and abort() */
 #include <metalsvm/stdio.h>
diff --git a/lwip/src/include/lwipopts.h b/lwip/src/include/lwipopts.h
index 68ae046b..34d12975 100644
--- a/lwip/src/include/lwipopts.h
+++ b/lwip/src/include/lwipopts.h
@@ -3,6 +3,8 @@
 #ifndef __LWIPOPTS_H__
 #define __LWIPOPTS_H_
 
+#include <metalsvm/stddef.h>
+
 /**
  * SYS_LIGHTWEIGHT_PROT==1: if you want inter-task protection for certain
  * critical regions during buffer allocation, deallocation and memory
@@ -59,10 +61,19 @@
  */
 #define LWIP_TCP		1
 
+/**
+ * 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.
+ */
+#define TCP_MSS			1460
+
 /**
  * TCP_SND_BUF: TCP sender buffer space (bytes). 
  */
-#define TCP_SND_BUF		(16*1024)
+#define TCP_SND_BUF		(16*TCP_WND)
 
 /**
  * LWIP_BROADCAST_PING==1: respond to broadcast pings (default is unicast only)
@@ -118,15 +129,6 @@
  */
 #define DEFAULT_THREAD_PRIO	NORMAL_PRIO
 
-/**
- * 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.
- */
-#define TCP_MSS			2048
-
 /**
  * PBUF_POOL_SIZE: the number of buffers in the pbuf pool. 
  */
@@ -175,7 +177,25 @@
  * MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP segments.
  * (requires the LWIP_TCP option)
  */
-#define MEMP_NUM_TCP_SEG		32
+#define MEMP_NUM_TCP_SEG		TCP_SND_QUEUELEN
+
+// On the SCC, we have not to check incoming messages
+#ifdef CONFIG_ROCKCREEK
+/**
+ * CHECKSUM_CHECK_IP==1: Check checksums in software for incoming IP packets.
+ */
+#define CHECKSUM_CHECK_IP		0
+
+/**
+ * CHECKSUM_CHECK_UDP==1: Check checksums in software for incoming UDP packets.
+ */
+#define CHECKSUM_CHECK_UDP		0
+
+/**
+ * CHECKSUM_CHECK_TCP==1: Check checksums in software for incoming TCP packets.
+ */
+#define CHECKSUM_CHECK_TCP		0
+#endif
 
 /* DEBUG options */
 #define LWIP_DEBUG		1
@@ -187,7 +207,7 @@
 #define MEM_DEBUG		LWIP_DBG_OFF
 #define IP_DEBUG		LWIP_DBG_OFF
 #define INET_DEBUG		LWIP_DBG_OFF
-#define NETIF_DEBUG		LWIP_DBG_ON
+#define NETIF_DEBUG		LWIP_DBG_OFF
 #define TIMERS_DEBUG		LWIP_DBG_OFF
 #define SOCKETS_DEBUG		LWIP_DBG_OFF
 #define PBUF_DEBUG		LWIP_DBG_OFF