From a5a870c683b00db31117c278beb026e72e143569 Mon Sep 17 00:00:00 2001
From: goldsimon <goldsimon>
Date: Sat, 6 Mar 2010 11:51:31 +0000
Subject: [PATCH] LWIP_NETIF_TX_SINGLE_PBUF needs TCP_OVERSIZE >= TCP_MSS for
 TCP

---
 src/core/init.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/core/init.c b/src/core/init.c
index 8fe00dee..b4689aa1 100644
--- a/src/core/init.c
+++ b/src/core/init.c
@@ -178,6 +178,9 @@
 #if LWIP_TCPIP_CORE_LOCKING_INPUT && !LWIP_TCPIP_CORE_LOCKING
   #error "When using LWIP_TCPIP_CORE_LOCKING_INPUT, LWIP_TCPIP_CORE_LOCKING must be enabled, too"
 #endif
+#if LWIP_TCP && LWIP_NETIF_TX_SINGLE_PBUF && (TCP_OVERSIZE < TCP_MSS)
+  #error "LWIP_NETIF_TX_SINGLE_PBUF needs TCP_OVERSIZE == TCP_MSS to create single-pbuf TCP packets"
+#endif
 
 
 /* Compile-time checks for deprecated options.