/** @file
  Main file for connect shell Driver1 function.

  (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
  Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include "UefiShellDriver1CommandsLib.h"

/**
  Create all handles associate with every device path node.

  @param  DevicePathToConnect           The device path which will be connected.

  @retval EFI_SUCCESS                   All handles associate with every device path node
                                        have been created.
  @retval EFI_INVALID_PARAMETER         DevicePathToConnect is NULL.
  @retval EFI_NOT_FOUND                 Create the handle associate with one device path
                                        node failed

**/
EFI_STATUS
ShellConnectDevicePath (
  IN EFI_DEVICE_PATH_PROTOCOL   *DevicePathToConnect
  )
{
  EFI_DEVICE_PATH_PROTOCOL  *RemainingDevicePath;
  EFI_STATUS                Status;
  EFI_HANDLE                Handle;
  EFI_HANDLE                PreviousHandle;

  if (DevicePathToConnect == NULL) {
    return EFI_INVALID_PARAMETER;
  }

  PreviousHandle = NULL;
  do{
    RemainingDevicePath = DevicePathToConnect;
    Status = gBS->LocateDevicePath (&gEfiDevicePathProtocolGuid, &RemainingDevicePath, &Handle);

    if (!EFI_ERROR (Status) && (Handle != NULL)) {
      if (PreviousHandle == Handle) {
        Status = EFI_NOT_FOUND;
      } else {
        PreviousHandle = Handle;
        Status = gBS->ConnectController (Handle, NULL, RemainingDevicePath, FALSE);
      }
    }

  } while (!EFI_ERROR (Status) && !IsDevicePathEnd (RemainingDevicePath) );

  return Status;

}

/**
  Connect drivers for PCI root bridge.

  @retval EFI_SUCCESS                     Connect drivers successfully.
  @retval EFI_NOT_FOUND                   Cannot find PCI root bridge device.

**/
EFI_STATUS
ShellConnectPciRootBridge (
  VOID
  )
{
  UINTN               RootBridgeHandleCount;
  EFI_HANDLE          *RootBridgeHandleBuffer;
  UINTN               RootBridgeIndex;
  EFI_STATUS          Status;

  RootBridgeHandleCount = 0;

  Status = gBS->LocateHandleBuffer (
              ByProtocol,
              &gEfiPciRootBridgeIoProtocolGuid,
              NULL,
              &RootBridgeHandleCount,
              &RootBridgeHandleBuffer
              );
  if (EFI_ERROR (Status)) {
    return Status;
  }

  for (RootBridgeIndex = 0; RootBridgeIndex < RootBridgeHandleCount; RootBridgeIndex++) {
    gBS->ConnectController (RootBridgeHandleBuffer[RootBridgeIndex], NULL, NULL, FALSE);
  }

  FreePool (RootBridgeHandleBuffer);

  return EFI_SUCCESS;
}


/**
  Connect controller(s) and driver(s).

  @param[in] ControllerHandle     The handle to the controller. Should have driver binding on it.
  @param[in] DriverHandle         The handle to the driver. Should have driver binding.
  @param[in] Recursive            TRUE to connect recursively, FALSE otherwise.
  @param[in] Output               TRUE to have info on the screen, FALSE otherwise.
  @param[in] AlwaysOutput         Override Output for errors.

  @retval EFI_SUCCESS             The operation was successful.
**/
EFI_STATUS
ConnectControllers (
  IN CONST EFI_HANDLE ControllerHandle OPTIONAL,
  IN CONST EFI_HANDLE DriverHandle OPTIONAL,
  IN CONST BOOLEAN    Recursive,
  IN CONST BOOLEAN    Output,
  IN CONST BOOLEAN    AlwaysOutput
  )
{
  EFI_STATUS Status;
  EFI_STATUS Status2;
  EFI_HANDLE *ControllerHandleList;
  EFI_HANDLE *DriverHandleList;
  EFI_HANDLE *HandleWalker;

  ControllerHandleList  = NULL;
  Status                = EFI_NOT_FOUND;
  Status2               = EFI_NOT_FOUND;

  //
  // If we have a single handle to connect make that a 'list'
  //
  if (DriverHandle == NULL) {
    DriverHandleList = NULL;
  } else {
    DriverHandleList = AllocateZeroPool(2*sizeof(EFI_HANDLE));
    if (DriverHandleList == NULL) {
      return (EFI_OUT_OF_RESOURCES);
    }
    DriverHandleList[0] = DriverHandle;
    DriverHandleList[1] = NULL;
  }

  //
  // do we connect all controllers (with a loop) or a single one...
  // This is where we call the gBS->ConnectController function.
  //
  if (ControllerHandle == NULL) {
    ControllerHandleList = GetHandleListByProtocol(&gEfiDevicePathProtocolGuid);
    for (HandleWalker = ControllerHandleList
      ;  HandleWalker != NULL && *HandleWalker != NULL
      ;  HandleWalker++
     ){
      Status = gBS->ConnectController(*HandleWalker, DriverHandleList, NULL, Recursive);
      if (!EFI_ERROR(Status)) {
        Status2 = EFI_SUCCESS;
      }
      if ((Output && !EFI_ERROR(Status)) || AlwaysOutput) {
        ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN(STR_HANDLE_RESULT), gShellDriver1HiiHandle, L"Connect", ConvertHandleToHandleIndex(*HandleWalker), Status);
      }
    }
  } else {
    Status = gBS->ConnectController(ControllerHandle, DriverHandleList, NULL, Recursive);
    if (!EFI_ERROR(Status)) {
      Status2 = EFI_SUCCESS;
    }
    if ((Output && !EFI_ERROR(Status)) || AlwaysOutput) {
      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN(STR_HANDLE_RESULT), gShellDriver1HiiHandle, L"Connect", ConvertHandleToHandleIndex(ControllerHandle), Status);
    }
  }

  //
  // Free any memory we allocated.
  //
  if (ControllerHandleList != NULL) {
    FreePool(ControllerHandleList);
  }
  if (DriverHandleList     != NULL) {
    FreePool(DriverHandleList);
  }
  return (Status2);
}

/**
  Do a connect from an EFI variable via it's key name.

  @param[in] Key      The name of the EFI Variable.

  @retval EFI_SUCCESS   The operation was successful.
**/
EFI_STATUS
ShellConnectFromDevPaths (
  IN CONST CHAR16 *Key
  )
{
  EFI_DEVICE_PATH_PROTOCOL  *DevPath;
  EFI_DEVICE_PATH_PROTOCOL  *CopyOfDevPath;
  EFI_DEVICE_PATH_PROTOCOL  *Instance;
  EFI_DEVICE_PATH_PROTOCOL  *Next;
  UINTN                     Length;
  UINTN                     Index;
  UINTN                     HandleArrayCount;
  UINTN                     Size;
  EFI_HANDLE                *HandleArray;
  EFI_STATUS                Status;
  BOOLEAN                   AtLeastOneConnected;
  EFI_PCI_IO_PROTOCOL       *PciIo;
  UINT8                     Class[3];

  DevPath = NULL;
  Length  = 0;
  AtLeastOneConnected = FALSE;

  //
  // Get the DevicePath buffer from the variable...
  //
  Status = gRT->GetVariable((CHAR16*)Key, (EFI_GUID*)&gEfiGlobalVariableGuid, NULL, &Length, DevPath);
  if (Status == EFI_BUFFER_TOO_SMALL) {
    DevPath = AllocateZeroPool(Length);
    if (DevPath == NULL) {
      return EFI_OUT_OF_RESOURCES;
    }
    Status = gRT->GetVariable((CHAR16*)Key, (EFI_GUID*)&gEfiGlobalVariableGuid, NULL, &Length, DevPath);
    if (EFI_ERROR (Status)) {
      if (DevPath != NULL) {
        FreePool (DevPath);
      }
      return Status;
    }
  } else if (EFI_ERROR (Status)) {
    return Status;
  }

  Status = EFI_NOT_FOUND;

  CopyOfDevPath = DevPath;
  //
  // walk the list of devices and connect them
  //
  do {
    //
    // Check every instance of the console variable
    //
    Instance = GetNextDevicePathInstance (&CopyOfDevPath, &Size);
    if (Instance == NULL) {
      if (DevPath != NULL) {
        FreePool (DevPath);
      }
      return EFI_UNSUPPORTED;
    }

    Next = Instance;
    while (!IsDevicePathEndType (Next)) {
      Next = NextDevicePathNode (Next);
    }

    SetDevicePathEndNode (Next);
    //
    // connect short form device path
    //
    if ((DevicePathType (Instance) == MESSAGING_DEVICE_PATH) &&
      ((DevicePathSubType (Instance) == MSG_USB_CLASS_DP)
      || (DevicePathSubType (Instance) == MSG_USB_WWID_DP)
      )) {

      Status = ShellConnectPciRootBridge ();
      if (EFI_ERROR(Status)) {
        FreePool(Instance);
        FreePool(DevPath);
        return Status;
      }

      Status = gBS->LocateHandleBuffer (
                  ByProtocol,
                  &gEfiPciIoProtocolGuid,
                  NULL,
                  &HandleArrayCount,
                  &HandleArray
                  );

      if (!EFI_ERROR (Status)) {
        for (Index = 0; Index < HandleArrayCount; Index++) {
          Status = gBS->HandleProtocol (
                      HandleArray[Index],
                      &gEfiPciIoProtocolGuid,
                      (VOID **)&PciIo
                      );

          if (!EFI_ERROR (Status)) {
            Status = PciIo->Pci.Read (PciIo, EfiPciIoWidthUint8, 0x09, 3, &Class);
            if (!EFI_ERROR (Status)) {
              if ((PCI_CLASS_SERIAL == Class[2]) &&
                  (PCI_CLASS_SERIAL_USB == Class[1])) {
                Status = gBS->ConnectController (
                              HandleArray[Index],
                              NULL,
                              Instance,
                              FALSE
                              );
                if (!EFI_ERROR(Status)) {
                  AtLeastOneConnected = TRUE;
                }
              }
            }
          }
        }
      }

      if (HandleArray != NULL) {
        FreePool (HandleArray);
      }
    } else {
      //
      // connect the entire device path
      //
      Status = ShellConnectDevicePath (Instance);
      if (!EFI_ERROR (Status)) {
        AtLeastOneConnected = TRUE;
      }
    }
    FreePool (Instance);

  } while (CopyOfDevPath != NULL);

  if (DevPath != NULL) {
    FreePool(DevPath);
  }

  if (AtLeastOneConnected) {
    return EFI_SUCCESS;
  } else {
    return EFI_NOT_FOUND;
  }

}

/**
  Convert the handle identifiers from strings and then connect them.

  One of them should have driver binding and either can be NULL.

  @param[in] Handle1            The first handle.
  @param[in] Handle2            The second handle.
  @param[in] Recursive          TRUE to do connect recursively. FALSE otherwise.
  @param[in] Output             TRUE to have output to screen. FALSE otherwise.

  @retval EFI_SUCCESS           The operation was successful.
**/
EFI_STATUS
ConvertAndConnectControllers (
  IN EFI_HANDLE     *Handle1 OPTIONAL,
  IN EFI_HANDLE     *Handle2 OPTIONAL,
  IN CONST BOOLEAN  Recursive,
  IN CONST BOOLEAN  Output
  )
{
  //
  // if only one is NULL verify it's the proper one...
  //
  if ( (Handle1 == NULL && Handle2 != NULL)
    || (Handle1 != NULL && Handle2 == NULL)
   ){
    //
    // Figure out which one should be NULL and move the handle to the right place.
    // If Handle1 is NULL then test Handle2 and vise versa.
    // The one that DOES has driver binding must be Handle2
    //
    if (Handle1 == NULL) {
      if (EFI_ERROR(gBS->OpenProtocol(Handle2, &gEfiDriverBindingProtocolGuid, NULL, NULL, gImageHandle, EFI_OPEN_PROTOCOL_TEST_PROTOCOL))) {
        // swap
        Handle1 = Handle2;
        Handle2 = NULL;
      } else {
        // We're all good...
      }
    } else {
      if (EFI_ERROR(gBS->OpenProtocol(Handle1, &gEfiDriverBindingProtocolGuid, NULL, NULL, gImageHandle, EFI_OPEN_PROTOCOL_TEST_PROTOCOL))) {
        // We're all good...
      } else {
        // swap
        Handle2 = Handle1;
        Handle1 = NULL;
      }
    }
  }

  return (ConnectControllers(Handle1, Handle2, Recursive, Output, (BOOLEAN)(Handle2 != NULL && Handle1 != NULL)));
}

STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
  {L"-c", TypeFlag},
  {L"-r", TypeFlag},
  {NULL, TypeMax}
  };

/**
  Function for 'connect' command.

  @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
**/
SHELL_STATUS
EFIAPI
ShellCommandRunConnect (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS          Status;
  LIST_ENTRY          *Package;
  CHAR16              *ProblemParam;
  SHELL_STATUS        ShellStatus;
  CONST CHAR16        *Param1;
  CONST CHAR16        *Param2;
  UINTN               Count;
  EFI_HANDLE          Handle1;
  EFI_HANDLE          Handle2;
  UINT64              Intermediate;

  ShellStatus         = SHELL_SUCCESS;
  //
  // initialize the shell lib (we must be in non-auto-init...)
  //
  Status = ShellInitialize();
  ASSERT_EFI_ERROR(Status);

  Status = CommandInit();
  ASSERT_EFI_ERROR(Status);

  //
  // parse the command line
  //
  Status = ShellCommandLineParse (ParamList, &Package, &ProblemParam, TRUE);
  if (EFI_ERROR(Status)) {
    if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellDriver1HiiHandle, L"connect", ProblemParam);
      FreePool(ProblemParam);
      ShellStatus = SHELL_INVALID_PARAMETER;
    } else {
      ASSERT(FALSE);
    }
  } else {
    //
    // if more than 2 'value' parameters (plus the name one) or either -r or -c with any value parameters we have too many parameters
    //
    Count = (gInReconnect?0x4:0x3);
    if ((ShellCommandLineGetCount(Package) > Count)
      ||(ShellCommandLineGetFlag(Package, L"-c") && ShellCommandLineGetCount(Package)>1)
      ||(ShellCommandLineGetFlag(Package, L"-r") && ShellCommandLineGetCount(Package)>2)
      ||(ShellCommandLineGetFlag(Package, L"-r") && ShellCommandLineGetFlag(Package, L"-c") )
    ){
      //
      // error for too many parameters
      //
      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellDriver1HiiHandle, L"connect");
      ShellStatus = SHELL_INVALID_PARAMETER;
    } else if (ShellCommandLineGetFlag(Package, L"-c")) {
      //
      // do the conin and conout from EFI variables
      // if the first fails dont 'loose' the error
      //
      Status = ShellConnectFromDevPaths(L"ConInDev");
      if (EFI_ERROR(Status)) {
        ShellConnectFromDevPaths(L"ConOutDev");
      } else {
        Status = ShellConnectFromDevPaths(L"ConOutDev");
      }
      if (EFI_ERROR(Status)) {
        ShellConnectFromDevPaths(L"ErrOutDev");
      } else {
        Status = ShellConnectFromDevPaths(L"ErrOutDev");
      }
      if (EFI_ERROR(Status)) {
        ShellConnectFromDevPaths(L"ErrOut");
      } else {
        Status = ShellConnectFromDevPaths(L"ErrOut");
      }
      if (EFI_ERROR(Status)) {
        ShellConnectFromDevPaths(L"ConIn");
      } else {
        Status = ShellConnectFromDevPaths(L"ConIn");
      }
      if (EFI_ERROR(Status)) {
        ShellConnectFromDevPaths(L"ConOut");
      } else {
        Status = ShellConnectFromDevPaths(L"ConOut");
      }
      if (EFI_ERROR(Status)) {
        ShellStatus = SHELL_DEVICE_ERROR;
      }
    } else {
      //
      // 0, 1, or 2 specific handles and possibly recursive
      //
      Param1  = ShellCommandLineGetRawValue(Package, 1);
      Param2  = ShellCommandLineGetRawValue(Package, 2);
      Count   = ShellCommandLineGetCount(Package);

      if (Param1 != NULL) {
        Status  = ShellConvertStringToUint64(Param1, &Intermediate, TRUE, FALSE);
        Handle1 = ConvertHandleIndexToHandle((UINTN)Intermediate);
        if (EFI_ERROR(Status)) {
          ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_INV_HANDLE), gShellDriver1HiiHandle, L"connect", Param1);
          ShellStatus = SHELL_INVALID_PARAMETER;
        }
      } else {
        Handle1 = NULL;
      }

      if (Param2 != NULL) {
        Status  = ShellConvertStringToUint64(Param2, &Intermediate, TRUE, FALSE);
        Handle2 = ConvertHandleIndexToHandle((UINTN)Intermediate);
        if (EFI_ERROR(Status)) {
          ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_INV_HANDLE), gShellDriver1HiiHandle, L"connect", Param2);
          ShellStatus = SHELL_INVALID_PARAMETER;
        }
      } else {
        Handle2 = NULL;
      }

      if (ShellStatus == SHELL_SUCCESS) {
        if (Param1 != NULL && Handle1 == NULL){
          ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_INV_HANDLE), gShellDriver1HiiHandle, L"connect", Param1);
          ShellStatus = SHELL_INVALID_PARAMETER;
        } else if (Param2 != NULL && Handle2 == NULL) {
          ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_INV_HANDLE), gShellDriver1HiiHandle, L"connect", Param2);
          ShellStatus = SHELL_INVALID_PARAMETER;
        } else if (Handle2 != NULL && Handle1 != NULL && EFI_ERROR(gBS->OpenProtocol(Handle2, &gEfiDriverBindingProtocolGuid, NULL, gImageHandle, NULL, EFI_OPEN_PROTOCOL_TEST_PROTOCOL))) {
          ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_INV_HANDLE), gShellDriver1HiiHandle, L"connect", Param2);
          ShellStatus = SHELL_INVALID_PARAMETER;
        } else {
          Status = ConvertAndConnectControllers(Handle1, Handle2, ShellCommandLineGetFlag(Package, L"-r"), (BOOLEAN)(Count!=0));
          if (EFI_ERROR(Status)) {
            ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CONNECT_NONE), gShellDriver1HiiHandle);
            ShellStatus = SHELL_DEVICE_ERROR;
          }
        }
      }
    }

    ShellCommandLineFreeVarList (Package);
  }
  return (ShellStatus);
}