NetworkPkg/Mtftp6Dxe/Mtftp6Impl.h

   1 /** @file
   2   Mtftp6 internal data structure and definition declaration.
   3
   4   Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved. <BR>
   5
   6   This program and the accompanying materials
   7   are licensed and made available under the terms and conditions of the BSD License
   8   which accompanies this distribution.  The full text of the license may be found at
   9   http://opensource.org/licenses/bsd-license.php.
  10
  11   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #ifndef __EFI_MTFTP6_IMPL_H__
  17 #define __EFI_MTFTP6_IMPL_H__
  18
  19 #include <Uefi.h>
  20
  21 #include <Protocol/Udp6.h>
  22 #include <Protocol/Mtftp6.h>
  23 #include <Protocol/ServiceBinding.h>
  24 #include <Protocol/DriverBinding.h>
  25
  26 #include <Library/DebugLib.h>
  27 #include <Library/UefiDriverEntryPoint.h>
  28 #include <Library/UefiBootServicesTableLib.h>
  29 #include <Library/UefiLib.h>
  30 #include <Library/BaseLib.h>
  31 #include <Library/NetLib.h>
  32
  33 typedef struct _MTFTP6_SERVICE  MTFTP6_SERVICE;
  34 typedef struct _MTFTP6_INSTANCE MTFTP6_INSTANCE;
  35
  36 #include "Mtftp6Driver.h"
  37 #include "Mtftp6Option.h"
  38 #include "Mtftp6Support.h"
  39
  40 #define MTFTP6_SERVICE_SIGNATURE       SIGNATURE_32 ('M', 'F', '6', 'S')
  41 #define MTFTP6_INSTANCE_SIGNATURE      SIGNATURE_32 ('M', 'F', '6', 'I')
  42
  43 #define MTFTP6_DEFAULT_SERVER_CMD_PORT 69
  44 #define MTFTP6_DEFAULT_TIMEOUT         3
  45 #define MTFTP6_GET_MAPPING_TIMEOUT     3
  46 #define MTFTP6_DEFAULT_MAX_RETRY       5
  47 #define MTFTP6_DEFAULT_BLK_SIZE        512
  48 #define MTFTP6_TICK_PER_SECOND         10000000U
  49
  50 #define MTFTP6_SERVICE_FROM_THIS(a)    CR (a, MTFTP6_SERVICE, ServiceBinding, MTFTP6_SERVICE_SIGNATURE)
  51 #define MTFTP6_INSTANCE_FROM_THIS(a)   CR (a, MTFTP6_INSTANCE, Mtftp6, MTFTP6_INSTANCE_SIGNATURE)
  52
  53 extern EFI_MTFTP6_PROTOCOL             gMtftp6ProtocolTemplate;
  54
  55 typedef struct _MTFTP6_GETINFO_CONTEXT{
  56   EFI_MTFTP6_PACKET             **Packet;
  57   UINT32                        *PacketLen;
  58   EFI_STATUS                    Status;
  59 } MTFTP6_GETINFO_CONTEXT;
  60
  61 //
  62 // Control block for MTFTP6 instance, it's per configuration data.
  63 //
  64 struct _MTFTP6_INSTANCE {
  65   UINT32                        Signature;
  66   EFI_HANDLE                    Handle;
  67   LIST_ENTRY                    Link;
  68   EFI_MTFTP6_PROTOCOL           Mtftp6;
  69   MTFTP6_SERVICE                *Service;
  70   EFI_MTFTP6_CONFIG_DATA        *Config;
  71
  72   EFI_MTFTP6_TOKEN              *Token;
  73   MTFTP6_EXT_OPTION_INFO        ExtInfo;
  74
  75   UINT16                        BlkSize;
  76   UINT16                        LastBlk;
  77   LIST_ENTRY                    BlkList;
  78
  79   EFI_IPv6_ADDRESS              ServerIp;
  80   UINT16                        ServerCmdPort;
  81   UINT16                        ServerDataPort;
  82   UDP_IO                        *UdpIo;
  83
  84   EFI_IPv6_ADDRESS              McastIp;
  85   UINT16                        McastPort;
  86   UDP_IO                        *McastUdpIo;
  87
  88   NET_BUF                       *LastPacket;
  89   UINT32                        CurRetry;
  90   UINT32                        MaxRetry;
  91   UINT32                        PacketToLive;
  92   UINT32                        Timeout;
  93
  94   EFI_TPL                       OldTpl;
  95   BOOLEAN                       IsTransmitted;
  96   BOOLEAN                       IsMaster;
  97   BOOLEAN                       InDestroy;
  98 };
  99
 100 //
 101 // Control block for MTFTP6 service, it's per Nic handle.
 102 //
 103 struct _MTFTP6_SERVICE {
 104   UINT32                        Signature;
 105   EFI_SERVICE_BINDING_PROTOCOL  ServiceBinding;
 106   EFI_HANDLE                    Controller;
 107   EFI_HANDLE                    Image;
 108
 109   UINT16                        ChildrenNum;
 110   LIST_ENTRY                    Children;
 111   //
 112   // It is used to be as internal calculagraph for all instances.
 113   //
 114   EFI_EVENT                     Timer;
 115   //
 116   // It is used to maintain the parent-child relationship between
 117   // mtftp driver and udp driver.
 118   //
 119   UDP_IO                        *DummyUdpIo;
 120   BOOLEAN                       InDestroy;
 121 };
 122
 123 /**
 124   Returns the current operating mode data for the MTFTP6 instance.
 125
 126   The GetModeData() function returns the current operating mode and
 127   cached data packet for the MTFTP6 instance.
 128
 129   @param[in]  This               Pointer to the EFI_MTFTP6_PROTOCOL instance.
 130   @param[out] ModeData           The buffer in which the EFI MTFTPv6 Protocol driver mode
 131                                  data is returned.
 132
 133   @retval  EFI_SUCCESS           The configuration data was returned successfully.
 134   @retval  EFI_OUT_OF_RESOURCES  The required mode data could not be allocated.
 135   @retval  EFI_INVALID_PARAMETER This is NULL, or ModeData is NULL.
 136
 137 **/
 138 EFI_STATUS
 139 EFIAPI
 140 EfiMtftp6GetModeData (
 141   IN  EFI_MTFTP6_PROTOCOL    *This,
 142   OUT EFI_MTFTP6_MODE_DATA   *ModeData
 143   );
 144
 145 /**
 146   Initializes, changes, or resets the default operational setting for
 147   this EFI MTFTPv6 Protocol driver instance.
 148
 149   The Configure() function is used to set and change the configuration
 150   data for this EFI MTFTPv6 Protocol driver instance. The configuration
 151   data can be reset to startup defaults by calling Configure() with
 152   MtftpConfigData set to NULL. Whenever the instance is reset, any
 153   pending operation is aborted. By changing the EFI MTFTPv6 Protocol
 154   driver instance configuration data, the client can connect to
 155   different MTFTPv6 servers. The configuration parameters in
 156   MtftpConfigData are used as the default parameters in later MTFTPv6
 157   operations and can be overridden in later operations.
 158
 159   @param[in]  This               Pointer to the EFI_MTFTP6_PROTOCOL instance.
 160   @param[in]  MtftpConfigData    Pointer to the configuration data structure.
 161
 162   @retval  EFI_SUCCESS           The EFI MTFTPv6 Protocol instance was configured successfully.
 163   @retval  EFI_INVALID_PARAMETER One or more following conditions are TRUE:
 164                                  - This is NULL.
 165                                  - MtftpConfigData.StationIp is neither zero nor one
 166                                    of the configured IP addresses in the underlying IPv6 driver.
 167                                  - MtftpCofigData.ServerIp is not a valid IPv6 unicast address.
 168                                  Note: It does not match the UEFI 2.3 Specification.
 169   @retval  EFI_ACCESS_DENIED     - The configuration could not be changed at this time because there
 170                                    is some MTFTP background operation in progress.
 171                                  - MtftpCofigData.LocalPort is already in use.
 172                                  Note: It does not match the UEFI 2.3 Specification.
 173   @retval  EFI_NO_MAPPING        The underlying IPv6 driver was responsible for choosing a source
 174                                  address for this instance, but no source address was available for use.
 175   @retval  EFI_OUT_OF_RESOURCES  The EFI MTFTPv6 Protocol driver instance data could not be
 176                                  allocated.
 177                                  Note: It is not defined in the UEFI 2.3 Specification.
 178   @retval  EFI_DEVICE_ERROR      An unexpected system or network error occurred. The EFI
 179                                  MTFTPv6 Protocol driver instance is not configured.
 180                                  Note: It is not defined in the UEFI 2.3 Specification.
 181
 182 **/
 183 EFI_STATUS
 184 EFIAPI
 185 EfiMtftp6Configure (
 186   IN EFI_MTFTP6_PROTOCOL    *This,
 187   IN EFI_MTFTP6_CONFIG_DATA *MtftpConfigData     OPTIONAL
 188   );
 189
 190 /**
 191   Get the information of the download from the server.
 192
 193   The GetInfo() function assembles an MTFTPv6 request packet
 194   with options, sends it to the MTFTPv6 server, and may return
 195   an MTFTPv6 OACK, MTFTPv6 ERROR, or ICMP ERROR packet. Retries
 196   occur only if no response packets are received from the MTFTPv6
 197   server before the timeout expires.
 198
 199   @param[in]  This               Pointer to the EFI_MTFTP6_PROTOCOL instance.
 200   @param[in]  OverrideData       Data that is used to override the existing parameters. If NULL, the
 201                                  default parameters that were set in the EFI_MTFTP6_PROTOCOL.Configure()
 202                                  function are used.
 203   @param[in]  Filename           Pointer to null-terminated ASCII file name string.
 204   @param[in]  ModeStr            Pointer to null-terminated ASCII mode string. If NULL, octet will be used
 205   @param[in]  OptionCount        Number of option/value string pairs in OptionList.
 206   @param[in]  OptionList         Pointer to array of option/value string pairs. Ignored if
 207                                  OptionCount is zero.
 208   @param[out] PacketLength       The number of bytes in the returned packet.
 209   @param[out] Packet             The pointer to the received packet. This buffer must be freed by
 210                                  the caller.
 211
 212   @retval  EFI_SUCCESS              An MTFTPv6 OACK packet was received and is in the Packet.
 213                                     Note: It does not match the UEFI 2.3 Specification.
 214   @retval  EFI_INVALID_PARAMETER    One or more of the following conditions is TRUE:
 215                                     - This is NULL.
 216                                     - Filename is NULL.
 217                                     - OptionCount is not zero and OptionList is NULL.
 218                                     - One or more options in OptionList have wrong format.
 219                                     - PacketLength is NULL.
 220                                     - OverrideData.ServerIp is not a valid unicast IPv6 address.
 221   @retval  EFI_UNSUPPORTED          One or more options in the OptionList are unsupported by
 222                                     this implementation.
 223   @retval  EFI_NOT_STARTED          The EFI MTFTPv6 Protocol driver has not been started.
 224   @retval  EFI_NO_MAPPING           The underlying IPv6 driver was responsible for choosing a source
 225                                     address for this instance, but no source address was available for use.
 226   @retval  EFI_ACCESS_DENIED        The previous operation has not completed yet.
 227   @retval  EFI_OUT_OF_RESOURCES     Required system resources could not be allocated.
 228   @retval  EFI_TFTP_ERROR           An MTFTPv6 ERROR packet was received and is in the Packet.
 229   @retval  EFI_NETWORK_UNREACHABLE  An ICMP network unreachable error packet was received, and the Packet is set to NULL.
 230                                     Note: It is not defined in the UEFI 2.3 Specification.
 231   @retval  EFI_HOST_UNREACHABLE     An ICMP host unreachable error packet was received, and the Packet is set to NULL.
 232                                     Note: It is not defined in the UEFI 2.3 Specification.
 233   @retval  EFI_PROTOCOL_UNREACHABLE An ICMP protocol unreachable error packet was received, and the Packet is set to NULL.
 234                                     Note: It is not defined in the UEFI 2.3 Specification.
 235   @retval  EFI_PORT_UNREACHABLE     An ICMP port unreachable error packet was received, and the Packet is set to NULL.
 236   @retval  EFI_ICMP_ERROR           Some other ICMP ERROR packet was received, and the Packet is set to NULL.
 237                                     Note: It does not match the UEFI 2.3 Specification.
 238   @retval  EFI_PROTOCOL_ERROR       An unexpected MTFTPv6 packet was received and is in the Packet.
 239   @retval  EFI_TIMEOUT              No responses were received from the MTFTPv6 server.
 240   @retval  EFI_DEVICE_ERROR         An unexpected network error or system error occurred.
 241
 242 **/
 243 EFI_STATUS
 244 EFIAPI
 245 EfiMtftp6GetInfo (
 246   IN  EFI_MTFTP6_PROTOCOL      *This,
 247   IN  EFI_MTFTP6_OVERRIDE_DATA *OverrideData         OPTIONAL,
 248   IN  UINT8                    *Filename,
 249   IN  UINT8                    *ModeStr              OPTIONAL,
 250   IN  UINT8                    OptionCount,
 251   IN  EFI_MTFTP6_OPTION        *OptionList           OPTIONAL,
 252   OUT UINT32                   *PacketLength,
 253   OUT EFI_MTFTP6_PACKET        **Packet              OPTIONAL
 254   );
 255
 256 /**
 257   Parse the options in an MTFTPv6 OACK packet.
 258
 259   The ParseOptions() function parses the option fields in an MTFTPv6 OACK
 260   packet and returns the number of options that were found, and optionally,
 261   a list of pointers to the options in the packet. If one or more of the
 262   option fields are not valid, then EFI_PROTOCOL_ERROR is returned and
 263   *OptionCount and *OptionList stop at the last valid option.
 264
 265   @param[in]  This               Pointer to the EFI_MTFTP6_PROTOCOL instance.
 266   @param[in]  PacketLen          Length of the OACK packet to be parsed.
 267   @param[in]  Packet             Pointer to the OACK packet to be parsed.
 268   @param[out] OptionCount        Pointer to the number of options in the following OptionList.
 269   @param[out] OptionList         Pointer to EFI_MTFTP6_OPTION storage. Each pointer in the
 270                                  OptionList points to the corresponding MTFTP option buffer
 271                                  in the Packet. Call the EFI Boot Service FreePool() to
 272                                  release the OptionList if the options in this OptionList
 273                                  are not needed any more.
 274
 275   @retval  EFI_SUCCESS           The OACK packet was valid and the OptionCount, and
 276                                  OptionList parameters have been updated.
 277   @retval  EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
 278                                  - PacketLen is 0.
 279                                  - Packet is NULL or Packet is not a valid MTFTPv6 packet.
 280                                  - OptionCount is NULL.
 281   @retval  EFI_NOT_FOUND         No options were found in the OACK packet.
 282   @retval  EFI_OUT_OF_RESOURCES  Storage for the OptionList array can not be allocated.
 283   @retval  EFI_PROTOCOL_ERROR    One or more of the option fields is invalid.
 284
 285 **/
 286 EFI_STATUS
 287 EFIAPI
 288 EfiMtftp6ParseOptions (
 289   IN     EFI_MTFTP6_PROTOCOL    *This,
 290   IN     UINT32                 PacketLen,
 291   IN     EFI_MTFTP6_PACKET      *Packet,
 292   OUT    UINT32                 *OptionCount,
 293   OUT    EFI_MTFTP6_OPTION      **OptionList          OPTIONAL
 294   );
 295
 296 /**
 297   Download a file from an MTFTPv6 server.
 298
 299   The ReadFile() function is used to initialize and start an MTFTPv6 download
 300   process and optionally wait for completion. When the download operation
 301   completes, whether successfully or not, the Token.Status field is updated
 302   by the EFI MTFTPv6 Protocol driver, and then Token.Event is signaled if it
 303   is not NULL.
 304   Data can be downloaded from the MTFTPv6 server into either of the following
 305   locations:
 306   - A fixed buffer that is pointed to by Token.Buffer.
 307   - A download service function that is pointed to by Token.CheckPacket.
 308   If both Token.Buffer and Token.CheckPacket are used, then Token.CheckPacket
 309   will be called first. If the call is successful, the packet will be stored
 310   in Token.Buffer.
 311
 312   @param[in]  This               Pointer to the EFI_MTFTP6_PROTOCOL instance.
 313   @param[in]  Token              Pointer to the token structure to provide the parameters that are
 314                                  used in this operation.
 315
 316   @retval  EFI_SUCCESS              The data file has been transferred successfully.
 317   @retval  EFI_OUT_OF_RESOURCES     Required system resources could not be allocated.
 318   @retval  EFI_BUFFER_TOO_SMALL     BufferSize is not zero but not large enough to hold the
 319                                     downloaded data in downloading process.
 320                                     Note: It does not match the UEFI 2.3 Specification.
 321   @retval  EFI_ABORTED              Current operation is aborted by user.
 322   @retval  EFI_NETWORK_UNREACHABLE  An ICMP network unreachable error packet was received.
 323                                     Note: It is not defined in the UEFI 2.3 Specification.
 324   @retval  EFI_HOST_UNREACHABLE     An ICMP host unreachable error packet was received.
 325                                     Note: It is not defined in the UEFI 2.3 Specification.
 326   @retval  EFI_PROTOCOL_UNREACHABLE An ICMP protocol unreachable error packet was received.
 327                                     Note: It is not defined in the UEFI 2.3 Specification.
 328   @retval  EFI_PORT_UNREACHABLE     An ICMP port unreachable error packet was received.
 329                                     Note: It is not defined in the UEFI 2.3 Specification.
 330   @retval  EFI_ICMP_ERROR           An ICMP ERROR packet was received.
 331   @retval  EFI_TIMEOUT              No responses were received from the MTFTPv6 server.
 332   @retval  EFI_TFTP_ERROR           An MTFTPv6 ERROR packet was received.
 333   @retval  EFI_DEVICE_ERROR         An unexpected network error or system error occurred.
 334
 335 **/
 336 EFI_STATUS
 337 EFIAPI
 338 EfiMtftp6ReadFile (
 339   IN EFI_MTFTP6_PROTOCOL    *This,
 340   IN EFI_MTFTP6_TOKEN       *Token
 341   );
 342
 343 /**
 344   Send a file to an MTFTPv6 server.
 345
 346   The WriteFile() function is used to initialize an uploading operation
 347   with the given option list, and optionally, wait for completion. If one
 348   or more of the options is not supported by the server, the unsupported
 349   options are ignored and a standard TFTP process starts instead. When
 350   the upload process completes, whether successfully or not, Token.Event
 351   is signaled, and the EFI MTFTPv6 Protocol driver updates Token.Status.
 352   The caller can supply the data to be uploaded in the following two modes:
 353   - Through the user-provided buffer.
 354   - Through a callback function.
 355   With the user-provided buffer, the Token.BufferSize field indicates
 356   the length of the buffer, and the driver will upload the data in the
 357   buffer. With an EFI_MTFTP6_PACKET_NEEDED callback function, the driver
 358   will call this callback function to get more data from the user to upload.
 359
 360   @param[in]  This               Pointer to the EFI_MTFTP6_PROTOCOL instance.
 361   @param[in]  Token              Pointer to the token structure to provide the parameters that are
 362                                  used in this operation.
 363
 364   @retval  EFI_SUCCESS           The upload session has started.
 365   @retval  EFI_UNSUPPORTED       The operation is not supported by this implementation.
 366   @retval  EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
 367                                  - This is NULL.
 368                                  - Token is NULL.
 369                                  - Token.Filename is NULL.
 370                                  - Token.OptionCount is not zero and Token.OptionList is NULL.
 371                                  - One or more options in Token.OptionList have wrong format.
 372                                  - Token.Buffer and Token.PacketNeeded are both NULL.
 373                                  - Token.OverrideData.ServerIp is not valid unicast IPv6 addresses.
 374   @retval  EFI_UNSUPPORTED       One or more options in the Token.OptionList are not
 375                                  supported by this implementation.
 376   @retval  EFI_NOT_STARTED       The EFI MTFTPv6 Protocol driver has not been started.
 377   @retval  EFI_NO_MAPPING        The underlying IPv6 driver was responsible for choosing a source
 378                                  address for this instance, but no source address was available for use.
 379   @retval  EFI_ALREADY_STARTED   This Token is already being used in another MTFTPv6 session.
 380   @retval  EFI_OUT_OF_RESOURCES  Required system resources could not be allocated.
 381   @retval  EFI_ACCESS_DENIED     The previous operation has not completed yet.
 382   @retval  EFI_DEVICE_ERROR      An unexpected network error or system error occurred.
 383
 384 **/
 385 EFI_STATUS
 386 EFIAPI
 387 EfiMtftp6WriteFile (
 388   IN EFI_MTFTP6_PROTOCOL    *This,
 389   IN EFI_MTFTP6_TOKEN       *Token
 390   );
 391
 392 /**
 393   Download a data file directory from an MTFTPv6 server.
 394
 395   The ReadDirectory() function is used to return a list of files on the
 396   MTFTPv6 server that are logically (or operationally) related to
 397   Token.Filename. The directory request packet that is sent to the server
 398   is built with the option list that was provided by caller, if present.
 399   The file information that the server returns is put into either of
 400   the following locations:
 401   - A fixed buffer that is pointed to by Token.Buffer.
 402   - A download service function that is pointed to by Token.CheckPacket.
 403   If both Token.Buffer and Token.CheckPacket are used, then Token.CheckPacket
 404   will be called first. If the call is successful, the packet will be stored
 405   in Token.Buffer.
 406
 407   @param[in]  This               Pointer to the EFI_MTFTP6_PROTOCOL instance.
 408   @param[in]  Token              Pointer to the token structure to provide the parameters that are
 409                                  used in this operation.
 410
 411   @retval  EFI_SUCCESS           The MTFTPv6 related file "directory" has been downloaded.
 412   @retval  EFI_UNSUPPORTED       The EFI MTFTPv6 Protocol driver does not support this function.
 413   @retval  EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
 414                                  - This is NULL.
 415                                  - Token is NULL.
 416                                  - Token.Filename is NULL.
 417                                  - Token.OptionCount is not zero and Token.OptionList is NULL.
 418                                  - One or more options in Token.OptionList have wrong format.
 419                                  - Token.Buffer and Token.CheckPacket are both NULL.
 420                                  - Token.OverrideData.ServerIp is not valid unicast IPv6 addresses.
 421   @retval  EFI_UNSUPPORTED       One or more options in the Token.OptionList are not
 422                                  supported by this implementation.
 423   @retval  EFI_NOT_STARTED       The EFI MTFTPv6 Protocol driver has not been started.
 424   @retval  EFI_NO_MAPPING        The underlying IPv6 driver was responsible for choosing a source
 425                                  address for this instance, but no source address was available for use.
 426   @retval  EFI_ALREADY_STARTED   This Token is already being used in another MTFTPv6 session.
 427   @retval  EFI_OUT_OF_RESOURCES  Required system resources could not be allocated.
 428   @retval  EFI_ACCESS_DENIED     The previous operation has not completed yet.
 429   @retval  EFI_DEVICE_ERROR      An unexpected network error or system error occurred.
 430
 431 **/
 432 EFI_STATUS
 433 EFIAPI
 434 EfiMtftp6ReadDirectory (
 435   IN EFI_MTFTP6_PROTOCOL        *This,
 436   IN EFI_MTFTP6_TOKEN           *Token
 437   );
 438
 439 /**
 440   Polls for incoming data packets and processes outgoing data packets.
 441
 442   The Poll() function can be used by network drivers and applications
 443   to increase the rate that data packets are moved between the
 444   communications device and the transmit and receive queues.In some
 445   systems, the periodic timer event in the managed network driver may
 446   not poll the underlying communications device fast enough to transmit
 447   and/or receive all data packets without missing incoming packets or
 448   dropping outgoing packets. Drivers and applications that are
 449   experiencing packet loss should try calling the Poll() function
 450   more often.
 451
 452   @param[in]  This                   The MTFTP6 protocol instance.
 453
 454
 455   @retval  EFI_SUCCESS           Incoming or outgoing data was processed.
 456   @retval  EFI_NOT_STARTED       This EFI MTFTPv6 Protocol instance has not been started.
 457   @retval  EFI_INVALID_PARAMETER This is NULL.
 458   @retval  EFI_DEVICE_ERROR      An unexpected system or network error occurred.
 459   @retval  EFI_TIMEOUT           Data was dropped out of the transmit and/or receive queue.
 460                                  Consider increasing the polling rate.
 461
 462 **/
 463 EFI_STATUS
 464 EFIAPI
 465 EfiMtftp6Poll (
 466   IN EFI_MTFTP6_PROTOCOL    *This
 467   );
 468
 469 #endif