1. Add Link MTU support to IP4 and TCP4 driver.

2. Integrate IPsec functionality to IP4 driver.
3. Move IP_VERSION_4/IP_VERSION_6 definition from IpIoLib to NetLib.
4. Move the Ip6/Udp6 protocol declaration from driver INF to Library INF (DxeIpIoLib and DxeUdpIoLib) for better readability.



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9413 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Impl.c

@@ -13,6 +13,8 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
 #include "Ip4Impl.h"
 
+EFI_IPSEC_PROTOCOL    *mIpSec = NULL;
+
 /**
   Gets the current operational settings for this instance of the EFI IPv4 Protocol driver.
   
@@ -404,6 +406,8 @@ EfiIp4GetModeData (
     Ip4ModeData->RouteTable    = NULL;
     Ip4ModeData->RouteCount    = 0;
 
+    Ip4ModeData->MaxPacketSize = IpSb->MaxPacketSize;
+
     //
     // return the current station address for this IP child. So,
     // the user can get the default address through this. Some
@@ -1764,6 +1768,13 @@ Ip4FreeTxToken (
 
   Wrap = (IP4_TXTOKEN_WRAP *) Context;
 
+  //
+  // Signal IpSecRecycleEvent to inform IPsec free the memory
+  //
+  if (Wrap->IpSecRecycleSignal != NULL) {
+    gBS->SignalEvent (Wrap->IpSecRecycleSignal);
+  }
+
   //
   // Find the token in the instance's map. EfiIp4Transmit put the
   // token to the map. If that failed, NetMapFindKey will return NULL.
@@ -1947,12 +1958,12 @@ EfiIp4Transmit (
   }
 
   Head.Fragment = IP4_HEAD_FRAGMENT_FIELD (DontFragment, FALSE, 0);
-  HeadLen       = sizeof (IP4_HEAD) + ((TxData->OptionsLength + 3) &~0x03);
+  HeadLen       = (TxData->OptionsLength + 3) & (~0x03);
 
   //
   // If don't fragment and fragment needed, return error
   //
-  if (DontFragment && (TxData->TotalDataLength + HeadLen > IpSb->SnpMode.MaxPacketSize)) {
+  if (DontFragment && (TxData->TotalDataLength + HeadLen > IpSb->MaxPacketSize)) {
     Status = EFI_BAD_BUFFER_SIZE;
     goto ON_EXIT;
   }