audk/MdeModulePkg/Universal/Network/PxeDhcp4Dxe/PxeDhcp4.c

/** @file

Copyright (c) 2004 - 2005, Intel Corporation
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
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

Module Name:
  PxeDhcp4.c

Abstract:


**/


#include "PxeDhcp4.h"

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

//
// Prototypes
// Driver model protocol interface
//
EFI_STATUS
EFIAPI
PxeDhcp4DriverEntryPoint (
  IN EFI_HANDLE           ImageHandle,
  IN EFI_SYSTEM_TABLE     *SystemTable
  );

EFI_STATUS
EFIAPI
PxeDhcp4DriverBindingSupported (
  IN EFI_DRIVER_BINDING_PROTOCOL    *This,
  IN EFI_HANDLE                     ControllerHandle,
  IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
  );

EFI_STATUS
EFIAPI
PxeDhcp4DriverBindingStart (
  IN EFI_DRIVER_BINDING_PROTOCOL    *This,
  IN EFI_HANDLE                     ControllerHandle,
  IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
  );

EFI_STATUS
EFIAPI
PxeDhcp4DriverBindingStop (
  IN  EFI_DRIVER_BINDING_PROTOCOL    *This,
  IN  EFI_HANDLE                     ControllerHandle,
  IN  UINTN                          NumberOfChildren,
  IN  EFI_HANDLE                     *ChildHandleBuffer
  );

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

//
// PXE DHCP Protocol Interface
//
EFI_DRIVER_BINDING_PROTOCOL gPxeDhcp4DriverBinding = {
  PxeDhcp4DriverBindingSupported,
  PxeDhcp4DriverBindingStart,
  PxeDhcp4DriverBindingStop,
  0xa,
  NULL,
  NULL
};

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

//
// PxeDhcp4 Driver Entry point funtion
//

/**
  Register Driver Binding protocol for this driver.

  @param  entry                EFI_IMAGE_ENTRY_POINT)

  @retval EFI_SUCCESS          Driver loaded.
  @retval other                Driver not loaded.

**/
EFI_STATUS
EFIAPI
PxeDhcp4DriverEntryPoint (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  return EfiLibInstallDriverBindingComponentName2 (
           ImageHandle,
           SystemTable,
           &gPxeDhcp4DriverBinding,
           NULL,
           &gPxeDhcp4ComponentName,
           &gPxeDhcp4ComponentName2
           );
}

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

/**
  Test to see if this driver supports ControllerHandle.  Any
  ControllerHandle that contains a PxeBaseCode protocol can be
  supported.

  @param  This                 Protocol instance pointer.
  @param  ControllerHandle     Handle of device to test.
  @param  RemainingDevicePath  Not used.

  @retval EFI_SUCCESS          This driver supports this device.
  @retval EFI_ALREADY_STARTED  This driver is already running on this device.
  @retval other                This driver does not support this device.

**/
EFI_STATUS
EFIAPI
PxeDhcp4DriverBindingSupported (
  IN EFI_DRIVER_BINDING_PROTOCOL  * This,
  IN EFI_HANDLE                   ControllerHandle,
  IN EFI_DEVICE_PATH_PROTOCOL     * RemainingDevicePath OPTIONAL
  )
{
  EFI_STATUS                  Status;
  EFI_PXE_BASE_CODE_PROTOCOL  *PxeBc;

  //
  // Open the IO Abstraction(s) needed to perform the supported test.
  //
  Status = gBS->OpenProtocol (
                  ControllerHandle,
                  &gEfiPxeBaseCodeProtocolGuid,
                  (VOID **) &PxeBc,
                  This->DriverBindingHandle,
                  ControllerHandle,
                  EFI_OPEN_PROTOCOL_BY_DRIVER
                  );

  if (EFI_ERROR (Status)) {
    return Status;
  }
  //
  // Close the I/O Abstraction(s) used to perform the supported test.
  //
  return gBS->CloseProtocol (
                ControllerHandle,
                &gEfiPxeBaseCodeProtocolGuid,
                This->DriverBindingHandle,
                ControllerHandle
                );
}

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

/**
  Start this driver on ControllerHandle by opening a PxeBaseCode
  protocol and installing a PxeDhcp4 protocol on ControllerHandle.

  @param  This                 Protocol instance pointer.
  @param  ControllerHandle     Handle of device to bind driver to.
  @param  RemainingDevicePath  Not used, always produce all possible children.

  @retval EFI_SUCCESS          This driver is added to ControllerHandle.
  @retval EFI_ALREADY_STARTED  This driver is already running on ControllerHandle.
  @retval other                This driver does not support this device.

**/
EFI_STATUS
EFIAPI
PxeDhcp4DriverBindingStart (
  IN EFI_DRIVER_BINDING_PROTOCOL  * This,
  IN EFI_HANDLE                   ControllerHandle,
  IN EFI_DEVICE_PATH_PROTOCOL     * RemainingDevicePath OPTIONAL
  )
{
  EFI_STATUS                  Status;
  EFI_PXE_BASE_CODE_PROTOCOL  *PxeBc;
  EFI_SIMPLE_NETWORK_PROTOCOL *Snp;
  PXE_DHCP4_PRIVATE_DATA      *Private;

  //
  // Connect to the PxeBaseCode interface on ControllerHandle.
  //
  Status = gBS->OpenProtocol (
                  ControllerHandle,
                  &gEfiPxeBaseCodeProtocolGuid,
                  (VOID **) &PxeBc,
                  This->DriverBindingHandle,
                  ControllerHandle,
                  EFI_OPEN_PROTOCOL_BY_DRIVER
                  );

  if (EFI_ERROR (Status)) {
    return Status;
  }
  //
  // BaseCode has already grabbed the SimpleNetwork interface
  // so just do a HandleProtocol() to get it.
  //
  Status = gBS->HandleProtocol (
                  ControllerHandle,
                  &gEfiSimpleNetworkProtocolGuid,
                  (VOID **) &Snp
                  );

  if (EFI_ERROR (Status)) {
    goto error_exit;
  }

  ASSERT (Snp);

  //
  // Initialize the PXE DHCP device instance.
  //
  Private = AllocateZeroPool (sizeof (PXE_DHCP4_PRIVATE_DATA));
  if (Private == NULL) {
    Status = EFI_OUT_OF_RESOURCES;
    goto error_exit;
  }

  Private->Signature          = PXE_DHCP4_PRIVATE_DATA_SIGNATURE;
  Private->PxeBc              = PxeBc;
  Private->Snp                = Snp;
  Private->Handle             = ControllerHandle;
  Private->PxeDhcp4.Revision  = EFI_PXE_DHCP4_PROTOCOL_REVISION;
  Private->PxeDhcp4.Run       = PxeDhcp4Run;
  Private->PxeDhcp4.Setup     = PxeDhcp4Setup;
  Private->PxeDhcp4.Init      = PxeDhcp4Init;
  Private->PxeDhcp4.Select    = PxeDhcp4Select;
  Private->PxeDhcp4.Renew     = PxeDhcp4Renew;
  Private->PxeDhcp4.Rebind    = PxeDhcp4Rebind;
  Private->PxeDhcp4.Release   = PxeDhcp4Release;
  Private->PxeDhcp4.Data      = NULL;

  //
  // Install protocol interfaces for the PXE DHCP device.
  //
  Status = gBS->InstallProtocolInterface (
                  &ControllerHandle,
                  &gEfiPxeDhcp4ProtocolGuid,
                  EFI_NATIVE_INTERFACE,
                  &Private->PxeDhcp4
                  );

  if (!EFI_ERROR (Status)) {
    return Status;
  }

error_exit: ;
  gBS->CloseProtocol (
        ControllerHandle,
        &gEfiPxeBaseCodeProtocolGuid,
        This->DriverBindingHandle,
        ControllerHandle
        );

  return Status;
}

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

/**
  Stop this driver on ControllerHandle by removing PXE DHCP
  protocol and closing the PXE Base Code protocol on
  ControllerHandle.

  @param  This                 Protocol instance pointer.
  @param  ControllerHandle     Handle of device to stop driver on.
  @param  NumberOfChildren     Not used.
  @param  ChildHandleBuffer    Not used.

  @retval EFI_SUCCESS          This driver is removed ControllerHandle.
  @retval other                This driver was not removed from this device.

**/
EFI_STATUS
EFIAPI
PxeDhcp4DriverBindingStop (
  IN  EFI_DRIVER_BINDING_PROTOCOL    *This,
  IN  EFI_HANDLE                     ControllerHandle,
  IN  UINTN                          NumberOfChildren,
  IN  EFI_HANDLE                     *ChildHandleBuffer
  )
{
  EFI_STATUS              Status;
  EFI_PXE_DHCP4_PROTOCOL  *PxeDhcp4;
  PXE_DHCP4_PRIVATE_DATA  *Private;

  //
  // Get our context back.
  //
  Status = gBS->OpenProtocol (
                  ControllerHandle,
                  &gEfiPxeDhcp4ProtocolGuid,
                  (VOID **) &PxeDhcp4,
                  This->DriverBindingHandle,
                  ControllerHandle,
                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
                  );

  if (EFI_ERROR (Status)) {
    return EFI_UNSUPPORTED;
  }

  Private = PXE_DHCP4_PRIVATE_DATA_FROM_THIS (PxeDhcp4);

  //
  // Release allocated resources
  //
  if (Private->PxeDhcp4.Data) {
    FreePool (Private->PxeDhcp4.Data);
    Private->PxeDhcp4.Data = NULL;
  }
  //
  // Uninstall our protocol
  //
  Status = gBS->UninstallProtocolInterface (
                  ControllerHandle,
                  &gEfiPxeDhcp4ProtocolGuid,
                  &Private->PxeDhcp4
                  );

  if (EFI_ERROR (Status)) {
    return Status;
  }
  //
  // Close any consumed protocols
  //
  Status = gBS->CloseProtocol (
                  ControllerHandle,
                  &gEfiPxeBaseCodeProtocolGuid,
                  This->DriverBindingHandle,
                  ControllerHandle
                  );

  if (EFI_ERROR (Status)) {
    return Status;
  }
  //
  // Release our private data
  //
  FreePool (Private);

  return Status;
}

/* EOF - PxeDhcp4.c */