[cgutman] 41011: - Store the MTU in the packet extension for use during segmentation by miniport drivers

Author: cgutman
Date: Wed May 20 07:10:49 2009
New Revision: 41011

URL: http://svn.reactos.org/svn/reactos?rev=41011&view=rev
Log:
 - Store the MTU in the packet extension for use during segmentation by miniport drivers

Modified:
    trunk/reactos/drivers/network/tcpip/datalink/lan.c

Modified: trunk/reactos/drivers/network/tcpip/datalink/lan.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/network/tcpip/data…
==============================================================================
--- trunk/reactos/drivers/network/tcpip/datalink/lan.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/network/tcpip/datalink/lan.c [iso-8859-1] Wed May 20 07:10:49
2009
@@ -600,6 +600,7 @@
     UINT Size;
     PLAN_ADAPTER Adapter = (PLAN_ADAPTER)Context;
     KIRQL OldIrql;
+    UINT PacketLength;
 
     TI_DbgPrint(DEBUG_DATALINK,
 		("Called( NdisPacket %x, Offset %d, Adapter %x )\n",
@@ -677,6 +678,14 @@
 		   ((PCHAR)LinkAddress)[4] & 0xff,
 		   ((PCHAR)LinkAddress)[5] & 0xff));
 	}
+
+        NdisQueryPacketLength(NdisPacket, &PacketLength);
+
+        if (Adapter->MTU < PacketLength) {
+            /* This is NOT a pointer. MSDN explicitly says so. */
+            NDIS_PER_PACKET_INFO_FROM_PACKET(NdisPacket,
+                                             TcpLargeSendPacketInfo) =
(PVOID)((ULONG)Adapter->MTU);
+        }
 
 	TcpipAcquireSpinLock( &Adapter->Lock, &OldIrql );
 	TI_DbgPrint(MID_TRACE, ("NdisSend\n"));