/** @file
  Raw IP4 transmit application

  Copyright (c) 2011-2012, 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.

**/

#include "RawIp4Tx.h"

UINT8 mBuffer[1024];

/**
  Transmit raw IP4 packets to the remote system.

  @param [in] ArgC        Argument count
  @param [in] ArgV        Argument value array

  @retval 0               Successfully operation
 **/

int
RawIp4Tx (
  IN int ArgC,
  IN char **ArgV
  )
{
  UINT32 BytesSent;
  ssize_t BytesTransmitted;
  struct sockaddr_in LocalPort;
  UINT32 RemoteAddress[4];
  struct sockaddr_in RemotePort;
  int RetVal;
  UINT32 TotalSent;
  SOCKET s;

  //
  //  Create the socket
  //
  s = socket ( AF_INET, SOCK_RAW, RAW_PROTOCOL );
  if ( -1 == s ) {
    RetVal = GET_ERRNO;
    printf ( "ERROR - socket error, errno: %d\r\n", RetVal );
  }
  else {
    //
    //  Use for/break; instead of goto
    //
    for ( ; ; ) {
      //
      //  Validate the arguments
      //
      if (( 2 > ArgC )
        || ( 4 != sscanf ( ArgV[1],
                           "%d.%d.%d.%d",
                           &RemoteAddress[0],
                           &RemoteAddress[1],
                           &RemoteAddress[2],
                           &RemoteAddress[3]))
          || ( 224 < RemoteAddress[0])
          || ( 255 < RemoteAddress[1])
          || ( 255 < RemoteAddress[2])
          || ( 255 < RemoteAddress[3])
          || (( 0 == RemoteAddress[0])
              && ( 0 == RemoteAddress[1])
              && ( 0 == RemoteAddress[2])
              && ( 0 == RemoteAddress[3]))) {
        printf ( "%s  <remote IP address>\r\n", ArgV[0]);
        RetVal = EINVAL;
        break;
      }

      //
      //  Bind the socket to a local port
      //
      memset ( &LocalPort, 0, sizeof ( LocalPort ));
      SIN_LEN ( LocalPort ) = sizeof ( LocalPort );
      SIN_FAMILY ( LocalPort ) = AF_INET;
      SIN_ADDR ( LocalPort ) = 0;
      SIN_PORT ( LocalPort ) = 0;
      RetVal = bind ( s,
                      (struct sockaddr *)&LocalPort,
                      sizeof ( LocalPort ));
      if ( -1 == RetVal ) {
        RetVal = GET_ERRNO;
        printf ( "ERROR - bind error, errno: %d\r\n", RetVal );
        break;
      }

      //
      //  Specify the remote port
      //
      memset ( &RemotePort, 0, sizeof ( RemotePort ));
      SIN_LEN ( RemotePort ) = sizeof ( RemotePort );
      SIN_FAMILY ( RemotePort ) = AF_INET;
      SIN_ADDR ( RemotePort ) = ( RemoteAddress[3] << 24 )
                              | ( RemoteAddress[2] << 16 )
                              | ( RemoteAddress[1] << 8 )
                              | RemoteAddress[0];
      SIN_PORT ( RemotePort ) = 0;

      //
      //  Initialize the messages
      //
      memset ( &mBuffer[0], 0, sizeof ( mBuffer ));

      //
      //  Send the data before the out-of-band message
      //
      TotalSent = 0;
      BytesSent = 0;
      do {
        BytesTransmitted = sendto ( s,
                                    &mBuffer[BytesSent],
                                    sizeof ( mBuffer ) - BytesSent,
                                    0,
                                    (struct sockaddr *)&RemotePort,
                                    sizeof ( RemotePort ));
        if ( -1 == BytesTransmitted ) {
          RetVal = GET_ERRNO;
          printf ( "ERROR - send before error, errno: %d\r\n", RetVal );
          break;
        }
        BytesSent += (UINT32)BytesTransmitted;
        RetVal = 0;
      } while ( sizeof ( mBuffer ) > BytesSent );
      if ( 0 != RetVal ) {
        break;
      }
      TotalSent += BytesSent;

      //
      //  Test completed successfully
      //
      if ( 0 == RetVal ) {
        printf ( "Bytes sent:  %8d\r\n", TotalSent );
      }
      break;
    }

    //
    //  Close the socket
    //
    CLOSE_SOCKET ( s );
  }

  //
  //  Return the operation status
  //
  return RetVal;
}