refine the code and add more security check.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9691 6f19259b-4bc3-4df7-8a09-765794883524
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@@ -1,6 +1,6 @@
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/** @file
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Copyright (c) 2006 - 2009, Intel Corporation.<BR>
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Copyright (c) 2006 - 2010, Intel Corporation.<BR>
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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@@ -32,7 +32,7 @@ EFI_SERVICE_BINDING_PROTOCOL mDhcp4ServiceBindingTemplate = {
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This is the declaration of an EFI image entry point. This entry point is
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the same for UEFI Applications, UEFI OS Loaders, and UEFI Drivers including
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both device drivers and bus drivers.
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Entry point of the DHCP driver to install various protocols.
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@param[in] ImageHandle The firmware allocated handle for the UEFI image.
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@@ -315,6 +315,7 @@ Dhcp4DriverBindingStart (
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if (EFI_ERROR (Status)) {
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return Status;
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}
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ASSERT (DhcpSb != NULL);
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//
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// Start the receiving
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@@ -360,7 +361,7 @@ ON_ERROR:
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restrictions for this service. DisconnectController()
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must follow these calling restrictions. If any other agent wishes
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to call Stop() it must also follow these calling restrictions.
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@param[in] This Protocol instance pointer.
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@param[in] ControllerHandle Handle of device to stop driver on
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@param[in] NumberOfChildren Number of Handles in ChildHandleBuffer. If number of
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@@ -482,14 +483,14 @@ DhcpInitProtocol (
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/**
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Creates a child handle and installs a protocol.
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The CreateChild() function installs a protocol on ChildHandle.
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If ChildHandle is a pointer to NULL, then a new handle is created and returned in ChildHandle.
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The CreateChild() function installs a protocol on ChildHandle.
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If ChildHandle is a pointer to NULL, then a new handle is created and returned in ChildHandle.
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If ChildHandle is not a pointer to NULL, then the protocol installs on the existing ChildHandle.
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@param This Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance.
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@param ChildHandle Pointer to the handle of the child to create. If it is NULL,
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then a new handle is created. If it is a pointer to an existing UEFI handle,
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then a new handle is created. If it is a pointer to an existing UEFI handle,
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then the protocol is added to the existing UEFI handle.
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@retval EFI_SUCCES The protocol was added to ChildHandle.
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@@ -578,9 +579,9 @@ Dhcp4ServiceBindingCreateChild (
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/**
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Destroys a child handle with a protocol installed on it.
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The DestroyChild() function does the opposite of CreateChild(). It removes a protocol
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that was installed by CreateChild() from ChildHandle. If the removed protocol is the
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The DestroyChild() function does the opposite of CreateChild(). It removes a protocol
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that was installed by CreateChild() from ChildHandle. If the removed protocol is the
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last protocol on ChildHandle, then ChildHandle is destroyed.
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@param This Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance.
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