NetLib:

1. Add new interface Ip6IsValidUnicast 
2. Add new enum IP6_EXTENSION_HEADER_TYPE
3. Add new structure IP6_ICMP_* definitions
4. Update structure from EFI_UDP4_HEADER to EFI_UDP_HEADER
5. Add new macro EFI_IP6_EQUAL


IpIoLib:
1. Update the IpIoLib to a combined library for both v4 and v6 network stack 
2. Fix a bug in IpIoIcmpHandler() - for IPv6 packet, the header length is variable (basic header + extension) rathar than fixed length.
   The fix removes the IPv6 header fields and notify the user with the ICMPv6 packet only containing payload.

TcpDxe/UdpDxe:
1. Update to adapt the new combined IpIoLib
2. Add gEfiIp6ProtocolGuid/gEfiIp6ServiceBindingProtocolGuid to [Protocols] in INF file since the Ip6.h is included in IpIoLib and NetLib.
3. Pass the TCP4/UDP4 UEFI SCT test on NT32 platform.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9374 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Misc.c

@@ -1,7 +1,7 @@
 /** @file
   Misc support routines for tcp.
 
-Copyright (c) 2005 - 2006, Intel Corporation<BR>
+Copyright (c) 2005 - 2009, Intel Corporation<BR>
 All rights reserved. This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution.  The full text of the license may be found at
@@ -478,7 +478,7 @@ TcpGetRcvMss (
   ASSERT (Sock != NULL);
 
   TcpProto = (TCP4_PROTO_DATA *) Sock->ProtoReserved;
-  Ip       = TcpProto->TcpService->IpIo->Ip;
+  Ip       = (EFI_IP4_PROTOCOL *) (TcpProto->TcpService->IpIo->Ip);
   ASSERT (Ip != NULL);
 
   Ip->GetModeData (Ip, NULL, NULL, &SnpMode);