NetworkPkg: Fix the driver model issue in HTTP Boot driver.

The HTTP Boot driver have some UEFI driver model problems which will make the
code ASSERT when it's disconnected.
First, the driver opens the HttpSb protocol BY_CHILD without BY_DRIVER attribute.
So the driver binding stop won't be called when HTTP driver is disconnected, so
a child handle is left and made HTTP driver binding stop function goes into error.
This patch remove this unnecessary OpenProtocol and only unload the HII from when
both the IP4 and IP6 stack have been stopped completely.
The second issue is the HTTP boot driver always use the driver's image handle as
it's driver binding handle, it's not correct. HTTP Boot driver provides 2 separate
driver binding protocols from IP4 and IP6 stack, so it has 2 driver binding handle.
So this patch fix the code to use correct driver binding handle when create/open
a HTTP child handle.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Jiaxin Wu <jiaxin.wu@intel.com>

NetworkPkg/HttpBootDxe/HttpBootClient.c

@@ -447,6 +447,7 @@ HttpBootCreateHttpIo (
 {
   HTTP_IO_CONFIG_DATA          ConfigData;
   EFI_STATUS                   Status;
+  EFI_HANDLE                   ImageHandle;
 
   ASSERT (Private != NULL);
 
@@ -456,14 +457,16 @@ HttpBootCreateHttpIo (
     ConfigData.Config4.RequestTimeOut = HTTP_BOOT_REQUEST_TIMEOUT;
     IP4_COPY_ADDRESS (&ConfigData.Config4.LocalIp, &Private->StationIp.v4);
     IP4_COPY_ADDRESS (&ConfigData.Config4.SubnetMask, &Private->SubnetMask.v4);
+    ImageHandle = Private->Ip4Nic->ImageHandle;
   } else {
     ConfigData.Config6.HttpVersion    = HttpVersion11;
     ConfigData.Config6.RequestTimeOut = HTTP_BOOT_REQUEST_TIMEOUT;
     IP6_COPY_ADDRESS (&ConfigData.Config6.LocalIp, &Private->StationIp.v6);
+    ImageHandle = Private->Ip6Nic->ImageHandle;
   }
 
   Status = HttpIoCreateIo (
-             Private->Image,
+             ImageHandle,
              Private->Controller,
              Private->UsingIpv6 ? IP_VERSION_6 : IP_VERSION_4,
              &ConfigData,

NetworkPkg/HttpBootDxe/HttpBootConfig.c

@@ -553,7 +553,6 @@ HttpBootConfigFormInit (
   EFI_STATUS                        Status;
   HTTP_BOOT_FORM_CALLBACK_INFO      *CallbackInfo;
   VENDOR_DEVICE_PATH                VendorDeviceNode;
-  EFI_SERVICE_BINDING_PROTOCOL      *HttpSb;
   CHAR16                            *MacString;
   CHAR16                            *OldMenuString;
   CHAR16                            MenuString[128];
@@ -600,20 +599,6 @@ HttpBootConfigFormInit (
                   &CallbackInfo->ConfigAccess,
                   NULL
                   );
-  if (!EFI_ERROR (Status)) {
-    //
-    // Open the Parent Handle for the child
-    //
-    Status = gBS->OpenProtocol (
-                    Private->Controller,
-                    &gEfiHttpServiceBindingProtocolGuid,
-                    (VOID **) &HttpSb,
-                    Private->Image,
-                    CallbackInfo->ChildHandle,
-                    EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
-                    );
-  }
-
   if (EFI_ERROR (Status)) {
     goto Error;
   }
@@ -636,7 +621,7 @@ HttpBootConfigFormInit (
   //
   // Append MAC string in the menu help string
   //
-  Status = NetLibGetMacString (Private->Controller, Private->Image, &MacString);
+  Status = NetLibGetMacString (Private->Controller, NULL, &MacString);
   if (!EFI_ERROR (Status)) {
     OldMenuString = HiiGetString (
                       CallbackInfo->RegisteredHandle, 
@@ -654,6 +639,7 @@ HttpBootConfigFormInit (
     FreePool (MacString);
     FreePool (OldMenuString);
 
+    CallbackInfo->Initilized = TRUE;
     return EFI_SUCCESS;
   }
   
@@ -666,6 +652,7 @@ Error:
 /**
   Unload the configuration form, this includes: delete all the configuration
   entries, uninstall the form callback protocol, and free the resources used.
+  The form will only be unload completely when both IP4 and IP6 stack are stopped.
 
   @param[in]  Private             Pointer to the driver private data.
 
@@ -680,18 +667,15 @@ HttpBootConfigFormUnload (
 {
   HTTP_BOOT_FORM_CALLBACK_INFO      *CallbackInfo;
 
+  if (Private->Ip4Nic != NULL || Private->Ip6Nic != NULL) {
+    //
+    // Only unload the configuration form when both IP4 and IP6 stack are stopped.
+    //
+    return EFI_SUCCESS;
+  }
+
   CallbackInfo = &Private->CallbackInfo;
   if (CallbackInfo->ChildHandle != NULL) {
-    //
-    // Close the child handle
-    //
-    gBS->CloseProtocol (
-           Private->Controller,
-           &gEfiHttpServiceBindingProtocolGuid,
-           Private->Image,
-           CallbackInfo->ChildHandle
-           );
-    
     //
     // Uninstall EFI_HII_CONFIG_ACCESS_PROTOCOL
     //

NetworkPkg/HttpBootDxe/HttpBootConfig.h

@@ -63,6 +63,7 @@ HttpBootConfigFormInit (
 /**
   Unload the configuration form, this includes: delete all the configuration
   entries, uninstall the form callback protocol, and free the resources used.
+  The form will only be unload completely when both IP4 and IP6 stack are stopped.
 
   @param[in]  Private             Pointer to the driver private data.
 

NetworkPkg/HttpBootDxe/HttpBootDxe.c

@@ -332,7 +332,6 @@ HttpBootIp4DxeDriverBindingStart (
     }
     Private->Signature = HTTP_BOOT_PRIVATE_DATA_SIGNATURE;
     Private->Controller = ControllerHandle;
-    Private->Image = This->ImageHandle;
     InitializeListHead (&Private->CacheList);
     //
     // Get the NII interface if it exists, it's not required.
@@ -400,6 +399,7 @@ HttpBootIp4DxeDriverBindingStart (
     return EFI_OUT_OF_RESOURCES;
   }
   Private->Ip4Nic->Private     = Private;
+  Private->Ip4Nic->ImageHandle = This->DriverBindingHandle;
   Private->Ip4Nic->Signature   = HTTP_BOOT_VIRTUAL_NIC_SIGNATURE;
   
   //
@@ -804,7 +804,6 @@ HttpBootIp6DxeDriverBindingStart (
     }
     Private->Signature = HTTP_BOOT_PRIVATE_DATA_SIGNATURE;
     Private->Controller = ControllerHandle;
-    Private->Image = This->ImageHandle;
     InitializeListHead (&Private->CacheList);
     //
     // Get the NII interface if it exists, it's not required.
@@ -872,6 +871,7 @@ HttpBootIp6DxeDriverBindingStart (
     return EFI_OUT_OF_RESOURCES;
   }
   Private->Ip6Nic->Private     = Private;
+  Private->Ip6Nic->ImageHandle = This->DriverBindingHandle;
   Private->Ip6Nic->Signature   = HTTP_BOOT_VIRTUAL_NIC_SIGNATURE;
   
   //

NetworkPkg/HttpBootDxe/HttpBootDxe.h

@@ -102,6 +102,7 @@ typedef union {
 struct _HTTP_BOOT_VIRTUAL_NIC {
   UINT32                                    Signature;
   EFI_HANDLE                                Controller;
+  EFI_HANDLE                                ImageHandle;
   EFI_LOAD_FILE_PROTOCOL                    LoadFile;
   EFI_DEVICE_PATH_PROTOCOL                  *DevicePath;
   HTTP_BOOT_PRIVATE_DATA                    *Private;
@@ -118,7 +119,6 @@ struct _HTTP_BOOT_VIRTUAL_NIC {
 struct _HTTP_BOOT_PRIVATE_DATA {
   UINT32                                    Signature;
   EFI_HANDLE                                Controller;
-  EFI_HANDLE                                Image;
 
   HTTP_BOOT_VIRTUAL_NIC                     *Ip4Nic;
   HTTP_BOOT_VIRTUAL_NIC                     *Ip6Nic;

NetworkPkg/HttpBootDxe/HttpBootSupport.c

@@ -372,7 +372,7 @@ HttpBootDns (
   //
   Status = NetLibCreateServiceChild (
              Private->Controller,
-             Private->Image,
+             Private->Ip6Nic->ImageHandle,
              &gEfiDns6ServiceBindingProtocolGuid,
              &Dns6Handle
              );
@@ -384,7 +384,7 @@ HttpBootDns (
                   Dns6Handle,
                   &gEfiDns6ProtocolGuid,
                   (VOID **) &Dns6,
-                  Private->Image,
+                  Private->Ip6Nic->ImageHandle,
                   Private->Controller,
                   EFI_OPEN_PROTOCOL_BY_DRIVER
                   );
@@ -474,7 +474,7 @@ Exit:
     gBS->CloseProtocol (
            Dns6Handle,
            &gEfiDns6ProtocolGuid,
-           Private->Image,
+           Private->Ip6Nic->ImageHandle,
            Private->Controller
            );
   }
@@ -482,7 +482,7 @@ Exit:
   if (Dns6Handle != NULL) {
     NetLibDestroyServiceChild (
       Private->Controller,
-      Private->Image,
+      Private->Ip6Nic->ImageHandle,
       &gEfiDns6ServiceBindingProtocolGuid,
       Dns6Handle
       );