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[mirror_edk2.git] / StdLib / EfiSocketLib / DxeSupport.c

/** @file\r
  SocketDxe support routines\r
\r
  Copyright (c) 2011, Intel Corporation\r
  All rights reserved. This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include "Socket.h"\r
\r
\r
/**\r
  Creates a child handle and installs gEfiSocketProtocolGuid.\r
\r
  This routine creates a child handle for the socket driver and\r
  installs the ::gEfiSocketProtocolGuid on that handle with a pointer\r
  to the ::EFI_SOCKET_PROTOCOL structure address.\r
\r
  This routine is called by ::EslServiceGetProtocol in UseSocketDxe\r
  when the socket application is linked with UseSocketDxe.\r
\r
  @param [in] pThis        Address of the EFI_SERVICE_BINDING_PROTOCOL structure.\r
  @param [in] pChildHandle Pointer to the handle of the child to create. If it is NULL,\r
                           then a new handle is created. If it is a pointer to an existing UEFI handle, \r
                           then the protocol is added to the existing UEFI handle.\r
\r
  @retval EFI_SUCCESS           The protocol was added to ChildHandle.\r
  @retval EFI_INVALID_PARAMETER ChildHandle is NULL.\r
  @retval EFI_OUT_OF_RESOURCES  There are not enough resources availabe to create\r
                                the child\r
  @retval other                 The child handle was not created\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
EslDxeCreateChild (\r
  IN     EFI_SERVICE_BINDING_PROTOCOL * pThis,\r
  IN OUT EFI_HANDLE * pChildHandle\r
  )\r
{\r
  ESL_SOCKET * pSocket;\r
  EFI_STATUS Status;\r
\r
  DBG_ENTER ( );\r
\r
  //\r
  //  Create a socket structure\r
  //\r
  Status = EslSocketAllocate ( pChildHandle,\r
                               DEBUG_SOCKET,\r
                               &pSocket );\r
\r
  //\r
  //  Return the operation status\r
  //\r
  DBG_EXIT_STATUS ( Status );\r
  return Status;\r
}\r
\r
\r
/**\r
  Removes gEfiSocketProtocolGuid and destroys the child handle.\r
\r
  This routine uninstalls ::gEfiSocketProtocolGuid from the child handle\r
  and destroys the child handle if necessary.\r
\r
  This routine is called from ???.\r
  \r
  @param [in] pThis       Address of the EFI_SERVICE_BINDING_PROTOCOL structure.\r
  @param [in] ChildHandle Handle of the child to destroy\r
\r
  @retval EFI_SUCCESS           The protocol was removed from ChildHandle.\r
  @retval EFI_UNSUPPORTED       ChildHandle does not support the protocol that is being removed.\r
  @retval EFI_INVALID_PARAMETER Child handle is not a valid UEFI Handle.\r
  @retval EFI_ACCESS_DENIED     The protocol could not be removed from the ChildHandle\r
                                because its services are being used.\r
  @retval other                 The child handle was not destroyed\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
EslDxeDestroyChild (\r
  IN EFI_SERVICE_BINDING_PROTOCOL * pThis,\r
  IN EFI_HANDLE ChildHandle\r
  )\r
{\r
  ESL_LAYER * pLayer;\r
  ESL_SOCKET * pSocket;\r
  ESL_SOCKET * pSocketPrevious;\r
  EFI_SOCKET_PROTOCOL * pSocketProtocol;\r
  EFI_STATUS Status;\r
  EFI_TPL TplPrevious;\r
\r
  DBG_ENTER ( );\r
\r
  //\r
  //  Locate the socket control structure\r
  //\r
  pLayer = &mEslLayer;\r
  Status = gBS->OpenProtocol (\r
                  ChildHandle,\r
                  &gEfiSocketProtocolGuid,\r
                  (VOID **)&pSocketProtocol,\r
                  pLayer->ImageHandle,\r
                  NULL,\r
                  EFI_OPEN_PROTOCOL_GET_PROTOCOL\r
                  );\r
  if ( !EFI_ERROR ( Status )) {\r
    pSocket = SOCKET_FROM_PROTOCOL ( pSocketProtocol );\r
\r
    //\r
    //  Synchronize with the socket layer\r
    //\r
    RAISE_TPL ( TplPrevious, TPL_SOCKETS );\r
\r
    //\r
    //  Walk the socket list\r
    //\r
    pSocketPrevious = pLayer->pSocketList;\r
    if ( NULL != pSocketPrevious ) {\r
      if ( pSocket == pSocketPrevious ) {\r
        //\r
        //  Remove the socket from the head of the list\r
        //\r
        pLayer->pSocketList = pSocket->pNext;\r
      }\r
      else {\r
        //\r
        //  Find the socket in the middle of the list\r
        //\r
        while (( NULL != pSocketPrevious )\r
          && ( pSocket != pSocketPrevious->pNext )) {\r
          //\r
          //  Set the next socket\r
          //\r
          pSocketPrevious = pSocketPrevious->pNext;\r
        }\r
        if ( NULL != pSocketPrevious ) {\r
          //\r
          //  Remove the socket from the middle of the list\r
          //\r
          pSocketPrevious = pSocket->pNext;\r
        }\r
      }\r
    }\r
    else {\r
      DEBUG (( DEBUG_ERROR | DEBUG_POOL,\r
                "ERROR - Socket list is empty!\r\n" ));\r
    }\r
\r
    //\r
    //  Release the socket layer synchronization\r
    //\r
    RESTORE_TPL ( TplPrevious );\r
\r
    //\r
    //  Determine if the socket was found\r
    //\r
    if ( NULL != pSocketPrevious ) {\r
      pSocket->pNext = NULL;\r
\r
      //\r
      //  Remove the socket protocol\r
      //\r
      Status = gBS->UninstallMultipleProtocolInterfaces (\r
                ChildHandle,\r
                &gEfiSocketProtocolGuid,\r
                &pSocket->SocketProtocol,\r
                NULL );\r
      if ( !EFI_ERROR ( Status )) {\r
        DEBUG (( DEBUG_POOL | DEBUG_INFO,\r
                    "Removed:   gEfiSocketProtocolGuid from 0x%08x\r\n",\r
                    ChildHandle ));\r
\r
        //\r
        //  Free the socket structure\r
        //\r
        Status = gBS->FreePool ( pSocket );\r
        if ( !EFI_ERROR ( Status )) {\r
          DEBUG (( DEBUG_POOL,\r
                    "0x%08x: Free pSocket, %d bytes\r\n",\r
                    pSocket,\r
                    sizeof ( *pSocket )));\r
        }\r
        else {\r
          DEBUG (( DEBUG_ERROR | DEBUG_POOL,\r
                    "ERROR - Failed to free pSocket 0x%08x, Status: %r\r\n",\r
                    pSocket,\r
                    Status ));\r
        }\r
      }\r
      else {\r
        DEBUG (( DEBUG_ERROR | DEBUG_POOL | DEBUG_INFO,\r
                    "ERROR - Failed to remove gEfiSocketProtocolGuid from 0x%08x, Status: %r\r\n",\r
                    ChildHandle,\r
                    Status ));\r
      }\r
    }\r
    else {\r
      DEBUG (( DEBUG_ERROR | DEBUG_INFO,\r
                "ERROR - The socket was not in the socket list!\r\n" ));\r
      Status = EFI_NOT_FOUND;\r
    }\r
  }\r
  else {\r
    DEBUG (( DEBUG_ERROR,\r
              "ERROR - Failed to open socket protocol on 0x%08x, Status; %r\r\n",\r
              ChildHandle,\r
              Status ));\r
  }\r
\r
  //\r
  //  Return the operation status\r
  //\r
  DBG_EXIT_STATUS ( Status );\r
  return Status;\r
}\r
\r
\r
/**\r
Install the socket service\r
\r
This routine installs the ::gEfiSocketServiceBindingProtocolGuid\r
on the SocketDxe image handle to announce the availability\r
of the socket layer to the rest of EFI.\r
\r
SocketDxe's EntryPoint routine calls this routine to\r
make the socket layer available.\r
\r
@param [in] pImageHandle      Address of the image handle\r
\r
@retval EFI_SUCCESS     Service installed successfully\r
**/\r
EFI_STATUS\r
EFIAPI\r
EslDxeInstall (\r
  IN EFI_HANDLE * pImageHandle\r
  )\r
{\r
  EFI_STATUS Status;\r
\r
  //\r
  //  Install the socket service binding protocol\r
  //\r
  Status = gBS->InstallMultipleProtocolInterfaces (\r
                  pImageHandle,\r
                  &gEfiSocketServiceBindingProtocolGuid,\r
                  mEslLayer.pServiceBinding,\r
                  NULL\r
                  );\r
  if ( !EFI_ERROR ( Status )) {\r
    DEBUG (( DEBUG_POOL | DEBUG_INIT | DEBUG_INFO,\r
              "Installed: gEfiSocketServiceBindingProtocolGuid on   0x%08x\r\n",\r
              *pImageHandle ));\r
  }\r
  else {\r
    DEBUG (( DEBUG_ERROR | DEBUG_POOL | DEBUG_INIT,\r
              "ERROR - InstallMultipleProtocolInterfaces failed, Status: %r\r\n",\r
              Status ));\r
  }\r
\r
  //\r
  //  Return the operation status\r
  //\r
  return Status;\r
}\r
\r
\r
/**\r
Uninstall the socket service\r
\r
This routine removes the gEfiSocketServiceBindingProtocolGuid from\r
the SocketDxe image handle to notify EFI that the socket layer\r
is no longer available.\r
\r
SocketDxe's DriverUnload routine calls this routine to remove the\r
socket layer.\r
\r
@param [in] ImageHandle       Handle for the image.\r
\r
@retval EFI_SUCCESS     Service installed successfully\r
**/\r
EFI_STATUS\r
EFIAPI\r
EslDxeUninstall (\r
  IN EFI_HANDLE ImageHandle\r
  )\r
{\r
  EFI_STATUS Status;\r
\r
  //\r
  //  Install the socket service binding protocol\r
  //\r
  Status = gBS->UninstallMultipleProtocolInterfaces (\r
              ImageHandle,\r
              &gEfiSocketServiceBindingProtocolGuid,\r
              mEslLayer.pServiceBinding,\r
              NULL\r
              );\r
  if ( !EFI_ERROR ( Status )) {\r
    DEBUG (( DEBUG_POOL | DEBUG_INIT,\r
                "Removed:   gEfiSocketServiceBindingProtocolGuid from 0x%08x\r\n",\r
                ImageHandle ));\r
  }\r
  else {\r
    DEBUG (( DEBUG_ERROR | DEBUG_POOL | DEBUG_INIT,\r
                "ERROR - Failed to remove gEfiSocketServiceBindingProtocolGuid from 0x%08x, Status: %r\r\n",\r
                ImageHandle,\r
                Status ));\r
  }\r
\r
  //\r
  //  Return the operation status\r
  //\r
  return Status;\r
}\r