StdLib/BsdSocketLib/getpeername.c

   1 /** @file
   2   Implement the getpeername API.
   3
   4   Copyright (c) 2011, Intel Corporation
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include <SocketInternals.h>
  16
  17
  18 /**
  19   Get the remote address
  20
  21   The ::getpeername routine retrieves the remote system address from the socket.
  22   The
  23   <a href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/getpeername.html#">POSIX</a>
  24   documentation is available online.
  25
  26   @param [in] s         Socket file descriptor returned from ::socket.
  27
  28   @param [out] address  Network address to receive the remote system address
  29
  30   @param [in] address_len Length of the remote network address structure
  31
  32   @returns    ::getpeername returns zero (0) if successful or -1 when an error occurs.
  33               In the case of an error, errno contains more details.
  34
  35  **/
  36 int
  37 getpeername (
  38   int s,
  39   struct sockaddr * address,
  40   socklen_t * address_len
  41   )
  42 {
  43   int RetVal;
  44   EFI_SOCKET_PROTOCOL * pSocketProtocol;
  45   EFI_STATUS Status;
  46
  47   //
  48   //  Assume failure
  49   //
  50   RetVal = -1;
  51
  52   //
  53   //  Locate the context for this socket
  54   //
  55   pSocketProtocol = BslFdToSocketProtocol ( s, NULL, &errno );
  56   if ( NULL != pSocketProtocol ) {
  57     //
  58     //  Get the remote address
  59     //
  60     Status = pSocketProtocol->pfnGetPeer ( pSocketProtocol,
  61                                            address,
  62                                            address_len,
  63                                            &errno );
  64     if ( !EFI_ERROR ( Status )) {
  65       RetVal = 0;
  66     }
  67   }
  68
  69   //
  70   //  Return the operation status
  71   //
  72   return RetVal;
  73 }