1. Fix a bug in PXE driver that the PXE boot do not restart if a new boot option on the different IP stack is selected.

2. Retrieve the IP information after iSCSI TCPv6 connection established and fill it into iBFT table.
3. Generate a random IAID for each NIC port to require different IPv6 address in PXE driver.
4. Update function EfiMtftp6Configure() and Mtftp6RrqHandleOack() to allocate at most one UdpIo.
5. Fix a typo from “destory” to “destroy” in network code.

Signed-off-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>
Reviewed-by: Ouyang Qian <qian.ouyang@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13859 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcDhcp.c

@@ -1,7 +1,7 @@
 /** @file
   Support for PxeBc dhcp functions.
 
-Copyright (c) 2007 - 2011, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2007 - 2012, Intel Corporation. All rights reserved.<BR>
 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
@@ -203,7 +203,7 @@ PxeBcParseCachedDhcpPacket (
             (Offer->Dhcp4.Header.BootFileName[0] != 0)) {
     //
     // If the bootfile is not present and bootfilename is present in dhcp packet, just parse it.
-    // And do not count dhcp option header, or else will destory the serverhostname.
+    // And do not count dhcp option header, or else will destroy the serverhostname.
     //
     Options[PXEBC_DHCP4_TAG_INDEX_BOOTFILE] = (EFI_DHCP4_PACKET_OPTION *) (&Offer->Dhcp4.Header.BootFileName[0] -
                                             OFFSET_OF (EFI_DHCP4_PACKET_OPTION, Data[0]));