audk/MdeModulePkg/Universal/Network/Tcp4Dxe/SockInterface.c

/** @file

Copyright (c) 2005 - 2006, 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:

  SockInterface.c

Abstract:


**/


#include "SockImpl.h"


/**
  Check whether the Event is in the List.

  @param  List                 Pointer to the token list to be searched.
  @param  Event                The event to be checked.

  @retval BOOLEAN              If TRUE, the specific Event exists in the List. If
                               FALSE, the specific Event is not in the List.

**/
STATIC
BOOLEAN
SockTokenExistedInList (
  IN NET_LIST_ENTRY *List,
  IN EFI_EVENT      Event
  )
{
  NET_LIST_ENTRY  *ListEntry;
  SOCK_TOKEN      *SockToken;

  NET_LIST_FOR_EACH (ListEntry, List) {
    SockToken = NET_LIST_USER_STRUCT (
                  ListEntry,
                  SOCK_TOKEN,
                  TokenList
                  );

    if (Event == SockToken->Token->Event) {
      return TRUE;
    }
  }

  return FALSE;
}


/**
  Call SockTokenExistedInList() to check whether the Event is
  in the related socket's lists.

  @param  Sock                 Pointer to the instance's socket.
  @param  Event                The event to be checked.

  @return The specific Event exists in one of socket's lists or not.

**/
BOOLEAN
SockTokenExisted (
  IN SOCKET    *Sock,
  IN EFI_EVENT Event
  )
{

  if (SockTokenExistedInList (&Sock->SndTokenList, Event) ||
      SockTokenExistedInList (&Sock->ProcessingSndTokenList, Event) ||
      SockTokenExistedInList (&Sock->RcvTokenList, Event) ||
      SockTokenExistedInList (&Sock->ListenTokenList, Event)
        ) {

    return TRUE;
  }

  if ((Sock->ConnectionToken != NULL) &&
      (Sock->ConnectionToken->Event == Event)) {

    return TRUE;
  }

  if ((Sock->CloseToken != NULL) && (Sock->CloseToken->Event == Event)) {
    return TRUE;
  }

  return FALSE;
}


/**
  Buffer a token into the specific list of socket Sock.

  @param  Sock                 Pointer to the instance's socket.
  @param  List                 Pointer to the list to store the token.
  @param  Token                Pointer to the token to be buffered.
  @param  DataLen              The data length of the buffer contained in Token.

  @return Pointer to the token that wraps Token. If NULL, error condition occurred.

**/
SOCK_TOKEN *
SockBufferToken (
  IN SOCKET         *Sock,
  IN NET_LIST_ENTRY *List,
  IN VOID           *Token,
  IN UINT32         DataLen
  )
{
  SOCK_TOKEN  *SockToken;

  SockToken = NetAllocatePool (sizeof (SOCK_TOKEN));
  if (NULL == SockToken) {

    SOCK_DEBUG_ERROR (("SockBufferIOToken: No Memory "
      "to allocate SockToken\n"));

    return NULL;
  }

  SockToken->Sock           = Sock;
  SockToken->Token          = (SOCK_COMPLETION_TOKEN *) Token;
  SockToken->RemainDataLen  = DataLen;
  NetListInsertTail (List, &SockToken->TokenList);

  return SockToken;
}


/**
  Destory the socket Sock and its associated protocol control block.

  @param  Sock                 The socket to be destroyed.

  @retval EFI_SUCCESS          The socket Sock is destroyed successfully.
  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket.

**/
EFI_STATUS
SockDestroyChild (
  IN   SOCKET *Sock
  )
{
  EFI_STATUS  Status;

  ASSERT (Sock && Sock->ProtoHandler);

  if (Sock->IsDestroyed) {
    return EFI_SUCCESS;
  }

  Sock->IsDestroyed = TRUE;

  Status = NET_TRYLOCK (&(Sock->Lock));
  if (EFI_ERROR (Status)) {

    SOCK_DEBUG_ERROR (("SockDestroyChild: Get the lock to "
      "access socket failed with %r\n", Status));

    return EFI_ACCESS_DENIED;
  }

  //
  // force protocol layer to detach the PCB
  //
  Status = Sock->ProtoHandler (Sock, SOCK_DETACH, NULL);

  if (EFI_ERROR (Status)) {

    SOCK_DEBUG_ERROR (("SockDestroyChild: Protocol detach socket"
      " failed with %r\n", Status));

    Sock->IsDestroyed = FALSE;
  } else if (SOCK_IS_CONFIGURED (Sock)) {

    SockConnFlush (Sock);
    SockSetState (Sock, SO_CLOSED);

    Sock->ConfigureState = SO_UNCONFIGURED;
  }

  NET_UNLOCK (&(Sock->Lock));

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

  SockDestroy (Sock);
  return EFI_SUCCESS;
}


/**
  Create a socket and its associated protocol control block
  with the intial data SockInitData and protocol specific
  data ProtoData.

  @param  SockInitData         Inital data to setting the socket.
  @param  ProtoData            Pointer to the protocol specific data.
  @param  Len                  Length of the protocol specific data.

  @return Pointer to the newly created socket. If NULL, error condition occured.

**/
SOCKET *
SockCreateChild (
  IN SOCK_INIT_DATA *SockInitData,
  IN VOID           *ProtoData,
  IN UINT32         Len
  )
{
  SOCKET      *Sock;
  EFI_STATUS  Status;

  ASSERT (ProtoData && (Len <= PROTO_RESERVED_LEN));

  //
  // create a new socket
  //
  Sock = SockCreate (SockInitData);
  if (NULL == Sock) {

    SOCK_DEBUG_ERROR (("SockCreateChild: No resource to "
      "create a new socket\n"));

    return NULL;
  }

  //
  // Open the
  //

  //
  // copy the protodata into socket
  //
  NetCopyMem (Sock->ProtoReserved, ProtoData, Len);

  Status = NET_TRYLOCK (&(Sock->Lock));
  if (EFI_ERROR (Status)) {

    SOCK_DEBUG_ERROR (("SockCreateChild: Get the lock to "
      "access socket failed with %r\n", Status));

    SockDestroy (Sock);
    return NULL;
  }
  //
  // inform the protocol layer to attach the socket
  // with a new protocol control block
  //
  Status = Sock->ProtoHandler (Sock, SOCK_ATTACH, NULL);
  if (EFI_ERROR (Status)) {

    SOCK_DEBUG_ERROR (("SockCreateChild: Protocol failed to"
      " attach a socket with %r\n", Status));

    SockDestroy (Sock);
    Sock = NULL;
  }

  NET_UNLOCK (&(Sock->Lock));
  return Sock;
}


/**
  Configure the specific socket Sock using configuration data
  ConfigData.

  @param  Sock                 Pointer to the socket to be configured.
  @param  ConfigData           Pointer to the configuration data.

  @retval EFI_SUCCESS          The socket is configured successfully.
  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket or the
                               socket is already configured.

**/
EFI_STATUS
SockConfigure (
  IN SOCKET *Sock,
  IN VOID   *ConfigData
  )
{
  EFI_STATUS  Status;

  Status = NET_TRYLOCK (&(Sock->Lock));
  if (EFI_ERROR (Status)) {

    SOCK_DEBUG_ERROR (("SockConfigure: Get the access for "
      "socket failed with %r", Status));

    return EFI_ACCESS_DENIED;
  }

  if (SOCK_IS_CONFIGURED (Sock)) {
    Status = EFI_ACCESS_DENIED;
    goto OnExit;
  }

  ASSERT (Sock->State == SO_CLOSED);

  Status = Sock->ProtoHandler (Sock, SOCK_CONFIGURE, ConfigData);

OnExit:
  NET_UNLOCK (&(Sock->Lock));

  return Status;
}


/**
  Initiate a connection establishment process.

  @param  Sock                 Pointer to the socket to initiate the initate the
                               connection.
  @param  Token                Pointer to the token used for the connection
                               operation.

  @retval EFI_SUCCESS          The connection is initialized successfully.
  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket, or the
                               socket is closed, or the socket is not configured to
                               be an active one, or the token is already in one of
                               this socket's lists.
  @retval EFI_NO_MAPPING       The IP address configuration operation is not
                               finished.
  @retval EFI_NOT_STARTED      The socket is not configured.

**/
EFI_STATUS
SockConnect (
  IN SOCKET *Sock,
  IN VOID   *Token
  )
{
  EFI_STATUS  Status;
  EFI_EVENT   Event;

  Status = NET_TRYLOCK (&(Sock->Lock));
  if (EFI_ERROR (Status)) {

    SOCK_DEBUG_ERROR (("SockConnect: Get the access for "
      "socket failed with %r", Status));

    return EFI_ACCESS_DENIED;
  }

  if (SOCK_IS_NO_MAPPING (Sock)) {
    Status = EFI_NO_MAPPING;
    goto OnExit;
  }

  if (SOCK_IS_UNCONFIGURED (Sock)) {

    Status = EFI_NOT_STARTED;
    goto OnExit;
  }

  if (!SOCK_IS_CLOSED (Sock) || !SOCK_IS_CONFIGURED_ACTIVE (Sock)) {

    Status = EFI_ACCESS_DENIED;
    goto OnExit;
  }

  Event = ((SOCK_COMPLETION_TOKEN *) Token)->Event;

  if (SockTokenExisted (Sock, Event)) {

    Status = EFI_ACCESS_DENIED;
    goto OnExit;
  }

  Sock->ConnectionToken = (SOCK_COMPLETION_TOKEN *) Token;
  SockSetState (Sock, SO_CONNECTING);
  Status = Sock->ProtoHandler (Sock, SOCK_CONNECT, NULL);

OnExit:
  NET_UNLOCK (&(Sock->Lock));
  return Status;
}


/**
  Issue a listen token to get an existed connected network instance
  or wait for a connection if there is none.

  @param  Sock                 Pointer to the socket to accept connections.
  @param  Token                The token to accept a connection.

  @retval EFI_SUCCESS          Either a connection is accpeted or the Token is
                               buffered for further acception.
  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket, or the
                               socket is closed, or the socket is not configured to
                               be a passive one, or the token is already in one of
                               this socket's lists.
  @retval EFI_NO_MAPPING       The IP address configuration operation is not
                               finished.
  @retval EFI_NOT_STARTED      The socket is not configured.
  @retval EFI_OUT_OF_RESOURCE  Failed to buffer the Token due to memory limit.

**/
EFI_STATUS
SockAccept (
  IN SOCKET *Sock,
  IN VOID   *Token
  )
{
  EFI_TCP4_LISTEN_TOKEN *ListenToken;
  NET_LIST_ENTRY        *ListEntry;
  EFI_STATUS            Status;
  SOCKET                *Socket;
  EFI_EVENT             Event;

  ASSERT (SOCK_STREAM == Sock->Type);

  Status = NET_TRYLOCK (&(Sock->Lock));
  if (EFI_ERROR (Status)) {

    SOCK_DEBUG_ERROR (("SockAccept: Get the access for socket"
      " failed with %r", Status));

    return EFI_ACCESS_DENIED;
  }

  if (SOCK_IS_NO_MAPPING (Sock)) {
    Status = EFI_NO_MAPPING;
    goto Exit;
  }

  if (SOCK_IS_UNCONFIGURED (Sock)) {

    Status = EFI_NOT_STARTED;
    goto Exit;
  }

  if (!SOCK_IS_LISTENING (Sock)) {

    Status = EFI_ACCESS_DENIED;
    goto Exit;
  }

  Event = ((SOCK_COMPLETION_TOKEN *) Token)->Event;

  if (SockTokenExisted (Sock, Event)) {

    Status = EFI_ACCESS_DENIED;
    goto Exit;
  }

  ListenToken = (EFI_TCP4_LISTEN_TOKEN *) Token;

  //
  // Check if a connection has already in this Sock->ConnectionList
  //
  NET_LIST_FOR_EACH (ListEntry, &Sock->ConnectionList) {

    Socket = NET_LIST_USER_STRUCT (ListEntry, SOCKET, ConnectionList);

    if (SOCK_IS_CONNECTED (Socket)) {
      ListenToken->NewChildHandle = Socket->SockHandle;
      SIGNAL_TOKEN (&(ListenToken->CompletionToken), EFI_SUCCESS);

      NetListRemoveEntry (ListEntry);

      ASSERT (Socket->Parent);

      Socket->Parent->ConnCnt--;

      SOCK_DEBUG_WARN (("SockAccept: Accept a socket,"
        "now conncount is %d", Socket->Parent->ConnCnt)
        );
      Socket->Parent = NULL;

      goto Exit;
    }
  }

  //
  // Buffer this token for latter incoming connection request
  //
  if (NULL == SockBufferToken (Sock, &(Sock->ListenTokenList), Token, 0)) {

    Status = EFI_OUT_OF_RESOURCES;
  }

Exit:
  NET_UNLOCK (&(Sock->Lock));

  return Status;
}


/**
  Issue a token with data to the socket to send out.

  @param  Sock                 Pointer to the socket to process the token with
                               data.
  @param  Token                The token with data that needs to send out.

  @retval EFI_SUCCESS          The token is processed successfully.
  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket, or the
                               socket is closed, or the socket is not in a
                               synchronized state , or the token is already in one
                               of this socket's lists.
  @retval EFI_NO_MAPPING       The IP address configuration operation is not
                               finished.
  @retval EFI_NOT_STARTED      The socket is not configured.
  @retval EFI_OUT_OF_RESOURCE  Failed to buffer the token due to memory limit.

**/
EFI_STATUS
SockSend (
  IN SOCKET *Sock,
  IN VOID   *Token
  )
{
  SOCK_IO_TOKEN           *SndToken;
  EFI_EVENT               Event;
  UINT32                  FreeSpace;
  EFI_TCP4_TRANSMIT_DATA  *TxData;
  EFI_STATUS              Status;
  SOCK_TOKEN              *SockToken;
  UINT32                  DataLen;

  ASSERT (SOCK_STREAM == Sock->Type);

  Status = NET_TRYLOCK (&(Sock->Lock));
  if (EFI_ERROR (Status)) {

    SOCK_DEBUG_ERROR (("SockSend: Get the access for socket"
      " failed with %r", Status));

    return EFI_ACCESS_DENIED;
  }

  if (SOCK_IS_NO_MAPPING (Sock)) {
    Status = EFI_NO_MAPPING;
    goto Exit;
  }

  SndToken  = (SOCK_IO_TOKEN *) Token;
  TxData    = (EFI_TCP4_TRANSMIT_DATA *) SndToken->Packet.TxData;

  if (SOCK_IS_UNCONFIGURED (Sock)) {
    Status = EFI_NOT_STARTED;
    goto Exit;
  }

  if (!(SOCK_IS_CONNECTING (Sock) || SOCK_IS_CONNECTED (Sock))) {

    Status = EFI_ACCESS_DENIED;
    goto Exit;
  }

  //
  // check if a token is already in the token buffer
  //
  Event = SndToken->Token.Event;

  if (SockTokenExisted (Sock, Event)) {
    Status = EFI_ACCESS_DENIED;
    goto Exit;
  }

  DataLen = (UINT32) TxData->DataLength;

  //
  // process this sending token now or buffer it only?
  //
  FreeSpace = SockGetFreeSpace (Sock, SOCK_SND_BUF);

  if ((FreeSpace < Sock->SndBuffer.LowWater) || !SOCK_IS_CONNECTED (Sock)) {

    SockToken = SockBufferToken (
                  Sock,
                  &Sock->SndTokenList,
                  SndToken,
                  DataLen
                  );

    if (NULL == SockToken) {
      Status = EFI_OUT_OF_RESOURCES;
    }
  } else {

    SockToken = SockBufferToken (
                  Sock,
                  &Sock->ProcessingSndTokenList,
                  SndToken,
                  DataLen
                  );

    if (NULL == SockToken) {
      SOCK_DEBUG_ERROR (("SockSend: Failed to buffer IO token into"
        " socket processing SndToken List\n", Status));

      Status = EFI_OUT_OF_RESOURCES;
      goto Exit;
    }

    Status = SockProcessTcpSndData (Sock, TxData);

    if (EFI_ERROR (Status)) {
      SOCK_DEBUG_ERROR (("SockSend: Failed to process "
        "Snd Data\n", Status));

      NetListRemoveEntry (&(SockToken->TokenList));
      NetFreePool (SockToken);
    }
  }

Exit:
  NET_UNLOCK (&(Sock->Lock));
  return Status;
}


/**
  Issue a token to get data from the socket.

  @param  Sock                 Pointer to the socket to get data from.
  @param  Token                The token to store the received data from the
                               socket.

  @retval EFI_SUCCESS          The token is processed successfully.
  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket, or the
                               socket is closed, or the socket is not in a
                               synchronized state , or the token is already in one
                               of this socket's lists.
  @retval EFI_NO_MAPPING       The IP address configuration operation is not
                               finished.
  @retval EFI_NOT_STARTED      The socket is not configured.
  @retval EFI_CONNECTION_FIN   The connection is closed and there is no more data.
  @retval EFI_OUT_OF_RESOURCE  Failed to buffer the token due to memory limit.

**/
EFI_STATUS
SockRcv (
  IN SOCKET *Sock,
  IN VOID   *Token
  )
{
  SOCK_IO_TOKEN *RcvToken;
  UINT32        RcvdBytes;
  EFI_STATUS    Status;
  EFI_EVENT     Event;

  ASSERT (SOCK_STREAM == Sock->Type);

  Status = NET_TRYLOCK (&(Sock->Lock));
  if (EFI_ERROR (Status)) {

    SOCK_DEBUG_ERROR (("SockRcv: Get the access for socket"
      " failed with %r", Status));

    return EFI_ACCESS_DENIED;
  }

  if (SOCK_IS_NO_MAPPING (Sock)) {

    Status = EFI_NO_MAPPING;
    goto Exit;
  }

  if (SOCK_IS_UNCONFIGURED (Sock)) {

    Status = EFI_NOT_STARTED;
    goto Exit;
  }

  if (!(SOCK_IS_CONNECTED (Sock) || SOCK_IS_CONNECTING (Sock))) {

    Status = EFI_ACCESS_DENIED;
    goto Exit;
  }

  RcvToken = (SOCK_IO_TOKEN *) Token;

  //
  // check if a token is already in the token buffer of this socket
  //
  Event = RcvToken->Token.Event;
  if (SockTokenExisted (Sock, Event)) {
    Status = EFI_ACCESS_DENIED;
    goto Exit;
  }

  RcvToken  = (SOCK_IO_TOKEN *) Token;
  RcvdBytes = GET_RCV_DATASIZE (Sock);

  //
  // check whether an error has happened before
  //
  if (EFI_ABORTED != Sock->SockError) {

    SIGNAL_TOKEN (&(RcvToken->Token), Sock->SockError);
    Sock->SockError = EFI_ABORTED;
    goto Exit;
  }

  //
  // check whether can not receive and there is no any
  // data buffered in Sock->RcvBuffer
  //
  if (SOCK_IS_NO_MORE_DATA (Sock) && (0 == RcvdBytes)) {

    Status = EFI_CONNECTION_FIN;
    goto Exit;
  }

  if (RcvdBytes != 0) {
    Status = SockProcessRcvToken (Sock, RcvToken);

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

    Status = Sock->ProtoHandler (Sock, SOCK_CONSUMED, NULL);
  } else {

    if (NULL == SockBufferToken (Sock, &Sock->RcvTokenList, RcvToken, 0)) {
      Status = EFI_OUT_OF_RESOURCES;
    }
  }

Exit:
  NET_UNLOCK (&(Sock->Lock));
  return Status;
}


/**
  Reset the socket and its associated protocol control block.

  @param  Sock                 Pointer to the socket to be flushed.

  @retval EFI_SUCCESS          The socket is flushed successfully.
  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket.

**/
EFI_STATUS
SockFlush (
  IN SOCKET *Sock
  )
{
  EFI_STATUS  Status;

  ASSERT (SOCK_STREAM == Sock->Type);

  Status = NET_TRYLOCK (&(Sock->Lock));
  if (EFI_ERROR (Status)) {

    SOCK_DEBUG_ERROR (("SockFlush: Get the access for socket"
      " failed with %r", Status));

    return EFI_ACCESS_DENIED;
  }

  if (!SOCK_IS_CONFIGURED (Sock)) {
    goto Exit;
  }

  Status = Sock->ProtoHandler (Sock, SOCK_FLUSH, NULL);
  if (EFI_ERROR (Status)) {

    SOCK_DEBUG_ERROR (("SockFlush: Protocol failed handling"
      " SOCK_FLUSH with %r", Status));

    goto Exit;
  }

  SOCK_ERROR (Sock, EFI_ABORTED);
  SockConnFlush (Sock);
  SockSetState (Sock, SO_CLOSED);

  Sock->ConfigureState = SO_UNCONFIGURED;

Exit:
  NET_UNLOCK (&(Sock->Lock));
  return Status;
}


/**
  Close or abort the socket associated connection.

  @param  Sock                 Pointer to the socket of the connection to close or
                               abort.
  @param  Token                The token for close operation.
  @param  OnAbort              TRUE for aborting the connection, FALSE to close it.

  @retval EFI_SUCCESS          The close or abort operation is initialized
                               successfully.
  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket, or the
                               socket is closed, or the socket is not in a
                               synchronized state , or the token is already in one
                               of this socket's lists.
  @retval EFI_NO_MAPPING       The IP address configuration operation is not
                               finished.
  @retval EFI_NOT_STARTED      The socket is not configured.

**/
EFI_STATUS
SockClose (
  IN SOCKET  *Sock,
  IN VOID    *Token,
  IN BOOLEAN OnAbort
  )
{
  EFI_STATUS  Status;
  EFI_EVENT   Event;

  ASSERT (SOCK_STREAM == Sock->Type);

  Status = NET_TRYLOCK (&(Sock->Lock));
  if (EFI_ERROR (Status)) {
    SOCK_DEBUG_ERROR (("SockClose: Get the access for socket"
      " failed with %r", Status));

    return EFI_ACCESS_DENIED;
  }

  if (SOCK_IS_NO_MAPPING (Sock)) {
    Status = EFI_NO_MAPPING;
    goto Exit;
  }

  if (SOCK_IS_UNCONFIGURED (Sock)) {
    Status = EFI_NOT_STARTED;
    goto Exit;
  }

  if (SOCK_IS_DISCONNECTING (Sock)) {
    Status = EFI_ACCESS_DENIED;
    goto Exit;
  }

  Event = ((SOCK_COMPLETION_TOKEN *) Token)->Event;

  if (SockTokenExisted (Sock, Event)) {
    Status = EFI_ACCESS_DENIED;
    goto Exit;
  }

  Sock->CloseToken = Token;
  SockSetState (Sock, SO_DISCONNECTING);

  if (OnAbort) {
    Status = Sock->ProtoHandler (Sock, SOCK_ABORT, NULL);
  } else {
    Status = Sock->ProtoHandler (Sock, SOCK_CLOSE, NULL);
  }

Exit:
  NET_UNLOCK (&(Sock->Lock));
  return Status;
}


/**
  Get the mode data of the low layer protocol.

  @param  Sock                 Pointer to the socket to get mode data from.
  @param  Mode                 Pointer to the data to store the low layer mode
                               information.

  @retval EFI_SUCCESS          The mode data is got successfully.
  @retval EFI_NOT_STARTED      The socket is not configured.

**/
EFI_STATUS
SockGetMode (
  IN SOCKET *Sock,
  IN VOID   *Mode
  )
{
  return Sock->ProtoHandler (Sock, SOCK_MODE, Mode);
}


/**
  Configure the low level protocol to join a multicast group for
  this socket's connection.

  @param  Sock                 Pointer to the socket of the connection to join the
                               specific multicast group.
  @param  GroupInfo            Pointer to the multicast group info.

  @retval EFI_SUCCESS          The configuration is done successfully.
  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket.
  @retval EFI_NOT_STARTED      The socket is not configured.

**/
EFI_STATUS
SockGroup (
  IN SOCKET *Sock,
  IN VOID   *GroupInfo
  )
{
  EFI_STATUS  Status;

  Status = NET_TRYLOCK (&(Sock->Lock));

  if (EFI_ERROR (Status)) {

    SOCK_DEBUG_ERROR (("SockGroup: Get the access for socket"
      " failed with %r", Status));

    return EFI_ACCESS_DENIED;
  }

  if (SOCK_IS_UNCONFIGURED (Sock)) {
    Status = EFI_NOT_STARTED;
    goto Exit;
  }

  Status = Sock->ProtoHandler (Sock, SOCK_GROUP, GroupInfo);

Exit:
  NET_UNLOCK (&(Sock->Lock));
  return Status;
}


/**
  Add or remove route information in IP route table associated
  with this socket.

  @param  Sock                 Pointer to the socket associated with the IP route
                               table to operate on.
  @param  RouteInfo            Pointer to the route information to be processed.

  @retval EFI_SUCCESS          The route table is updated successfully.
  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket.
  @retval EFI_NO_MAPPING       The IP address configuration operation is  not
                               finished.
  @retval EFI_NOT_STARTED      The socket is not configured.

**/
EFI_STATUS
SockRoute (
  IN SOCKET    *Sock,
  IN VOID      *RouteInfo
  )
{
  EFI_STATUS  Status;

  Status = NET_TRYLOCK (&(Sock->Lock));
  if (EFI_ERROR (Status)) {
    SOCK_DEBUG_ERROR (("SockRoute: Get the access for socket"
      " failed with %r", Status));

    return EFI_ACCESS_DENIED;
  }

  if (SOCK_IS_NO_MAPPING (Sock)) {
    Status = EFI_NO_MAPPING;
    goto Exit;
  }

  if (SOCK_IS_UNCONFIGURED (Sock)) {
    Status = EFI_NOT_STARTED;
    goto Exit;
  }

  Status = Sock->ProtoHandler (Sock, SOCK_ROUTE, RouteInfo);

Exit:
  NET_UNLOCK (&(Sock->Lock));
  return Status;
}