audk/MdeModulePkg/Universal/Network/Mtftp4Dxe/Mtftp4Option.h

/** @file
  Routines to process MTFTP4 options.
  
Copyright (c) 2006 - 2007, Intel Corporation<BR>
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<BR>

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/


#ifndef __EFI_MTFTP4_OPTION_H__
#define __EFI_MTFTP4_OPTION_H__



typedef enum {
  MTFTP4_SUPPORTED_OPTIONS = 4,
  MTFTP4_OPCODE_LEN        = 2,
  MTFTP4_ERRCODE_LEN       = 2,
  MTFTP4_BLKNO_LEN         = 2,
  MTFTP4_DATA_HEAD_LEN     = 4,

  MTFTP4_BLKSIZE_EXIST     = 0x01,
  MTFTP4_TIMEOUT_EXIST     = 0x02,
  MTFTP4_TSIZE_EXIST       = 0x04,
  MTFTP4_MCAST_EXIST       = 0x08
} MTFTP4_OPTION_CONST_VALUE;

typedef struct {
  UINT16                    BlkSize;
  UINT8                     Timeout;
  UINT32                    Tsize;
  IP4_ADDR                  McastIp;
  UINT16                    McastPort;
  BOOLEAN                   Master;
  UINT32                    Exist;
} MTFTP4_OPTION;

/**
  Allocate and fill in a array of Mtftp options from the Packet. 
  
  It first calls Mtftp4FillOption to get the option number, then allocate
  the array, at last, call Mtftp4FillOption again to save the options.

  @param  Packet                 The packet to parse
  @param  PacketLen              The length of the packet
  @param  OptionCount            The number of options in the packet
  @param  OptionList             The point to get the option array.

  @retval EFI_INVALID_PARAMETER  The parametera are invalid or packet isn't a
                                 well-formated OACK packet.
  @retval EFI_SUCCESS            The option array is build
  @retval EFI_OUT_OF_RESOURCES   Failed to allocate memory for the array

**/
EFI_STATUS
Mtftp4ExtractOptions (
  IN     EFI_MTFTP4_PACKET     *Packet,
  IN     UINT32                PacketLen,
     OUT UINT32                *OptionCount,
     OUT EFI_MTFTP4_OPTION     **OptionList        OPTIONAL
  );

/**
  Parse the option in Options array to MTFTP4_OPTION which program
  can access directly.

  @param  Options                The option array, which contains addresses of each
                                 option's name/value string.
  @param  Count                  The number of options in the Options
  @param  Request                Whether this is a request or OACK. The format of
                                 multicast is different according to this setting.
  @param  MtftpOption            The MTFTP4_OPTION for easy access.

  @retval EFI_INVALID_PARAMETER  The option is mal-formated
  @retval EFI_UNSUPPORTED        Some option isn't supported
  @retval EFI_SUCCESS            The option are OK and has been parsed.

**/
EFI_STATUS
Mtftp4ParseOption (
  IN     EFI_MTFTP4_OPTION     *Options,
  IN     UINT32                Count,
  IN     BOOLEAN               Request,
     OUT MTFTP4_OPTION         *MtftpOption
  );

/**
  Parse the options in the OACK packet to MTFTP4_OPTION which program
  can access directly.

  @param  Packet                 The OACK packet to parse
  @param  PacketLen              The length of the packet
  @param  MtftpOption            The MTFTP_OPTION for easy access.

  @retval EFI_INVALID_PARAMETER  The packet option is mal-formated
  @retval EFI_UNSUPPORTED        Some option isn't supported
  @retval EFI_SUCCESS            The option are OK and has been parsed.

**/
EFI_STATUS
Mtftp4ParseOptionOack (
  IN     EFI_MTFTP4_PACKET     *Packet,
  IN     UINT32                PacketLen,
     OUT MTFTP4_OPTION         *MtftpOption
  );

extern CHAR8  *mMtftp4SupportedOptions[MTFTP4_SUPPORTED_OPTIONS];

#endif