NetworkPkg/Mtftp6Dxe/Mtftp6Impl.h

   1 /** @file
   2   Mtftp6 internal data structure and definition declaration.
   3
   4   Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved. <BR>
   5
   6   SPDX-License-Identifier: BSD-2-Clause-Patent
   7
   8 **/
   9
  10 #ifndef __EFI_MTFTP6_IMPL_H__
  11 #define __EFI_MTFTP6_IMPL_H__
  12
  13 #include <Uefi.h>
  14
  15 #include <Protocol/Udp6.h>
  16 #include <Protocol/Mtftp6.h>
  17 #include <Protocol/ServiceBinding.h>
  18 #include <Protocol/DriverBinding.h>
  19
  20 #include <Library/DebugLib.h>
  21 #include <Library/UefiDriverEntryPoint.h>
  22 #include <Library/UefiBootServicesTableLib.h>
  23 #include <Library/UefiLib.h>
  24 #include <Library/BaseLib.h>
  25 #include <Library/NetLib.h>
  26 #include <Library/PrintLib.h>
  27
  28 typedef struct _MTFTP6_SERVICE  MTFTP6_SERVICE;
  29 typedef struct _MTFTP6_INSTANCE MTFTP6_INSTANCE;
  30
  31 #include "Mtftp6Driver.h"
  32 #include "Mtftp6Option.h"
  33 #include "Mtftp6Support.h"
  34
  35 #define MTFTP6_SERVICE_SIGNATURE       SIGNATURE_32 ('M', 'F', '6', 'S')
  36 #define MTFTP6_INSTANCE_SIGNATURE      SIGNATURE_32 ('M', 'F', '6', 'I')
  37
  38 #define MTFTP6_DEFAULT_SERVER_CMD_PORT 69
  39 #define MTFTP6_DEFAULT_TIMEOUT         3
  40 #define MTFTP6_GET_MAPPING_TIMEOUT     3
  41 #define MTFTP6_DEFAULT_MAX_RETRY       5
  42 #define MTFTP6_DEFAULT_BLK_SIZE        512
  43 #define MTFTP6_DEFAULT_WINDOWSIZE      1
  44 #define MTFTP6_TICK_PER_SECOND         10000000U
  45
  46 #define MTFTP6_SERVICE_FROM_THIS(a)    CR (a, MTFTP6_SERVICE, ServiceBinding, MTFTP6_SERVICE_SIGNATURE)
  47 #define MTFTP6_INSTANCE_FROM_THIS(a)   CR (a, MTFTP6_INSTANCE, Mtftp6, MTFTP6_INSTANCE_SIGNATURE)
  48
  49 extern EFI_MTFTP6_PROTOCOL             gMtftp6ProtocolTemplate;
  50
  51 typedef struct _MTFTP6_GETINFO_CONTEXT{
  52   EFI_MTFTP6_PACKET             **Packet;
  53   UINT32                        *PacketLen;
  54   EFI_STATUS                    Status;
  55 } MTFTP6_GETINFO_CONTEXT;
  56
  57 //
  58 // Control block for MTFTP6 instance, it's per configuration data.
  59 //
  60 struct _MTFTP6_INSTANCE {
  61   UINT32                        Signature;
  62   EFI_HANDLE                    Handle;
  63   LIST_ENTRY                    Link;
  64   EFI_MTFTP6_PROTOCOL           Mtftp6;
  65   MTFTP6_SERVICE                *Service;
  66   EFI_MTFTP6_CONFIG_DATA        *Config;
  67
  68   EFI_MTFTP6_TOKEN              *Token;
  69   MTFTP6_EXT_OPTION_INFO        ExtInfo;
  70
  71   UINT16                        BlkSize;
  72   UINT16                        LastBlk;
  73   LIST_ENTRY                    BlkList;
  74
  75   UINT16                        Operation;
  76
  77   UINT16                        WindowSize;
  78
  79   //
  80   // Record the total received and saved block number.
  81   //
  82   UINT64                        TotalBlock;
  83
  84   //
  85   // Record the acked block number.
  86   //
  87   UINT64                        AckedBlock;
  88
  89   EFI_IPv6_ADDRESS              ServerIp;
  90   UINT16                        ServerCmdPort;
  91   UINT16                        ServerDataPort;
  92   UDP_IO                        *UdpIo;
  93
  94   EFI_IPv6_ADDRESS              McastIp;
  95   UINT16                        McastPort;
  96   UDP_IO                        *McastUdpIo;
  97
  98   NET_BUF                       *LastPacket;
  99   UINT32                        CurRetry;
 100   UINT32                        MaxRetry;
 101   UINT32                        PacketToLive;
 102   UINT32                        Timeout;
 103
 104   EFI_TPL                       OldTpl;
 105   BOOLEAN                       IsTransmitted;
 106   BOOLEAN                       IsMaster;
 107   BOOLEAN                       InDestroy;
 108 };
 109
 110 //
 111 // Control block for MTFTP6 service, it's per Nic handle.
 112 //
 113 struct _MTFTP6_SERVICE {
 114   UINT32                        Signature;
 115   EFI_SERVICE_BINDING_PROTOCOL  ServiceBinding;
 116   EFI_HANDLE                    Controller;
 117   EFI_HANDLE                    Image;
 118
 119   UINT16                        ChildrenNum;
 120   LIST_ENTRY                    Children;
 121   //
 122   // It is used to be as internal calculagraph for all instances.
 123   //
 124   EFI_EVENT                     Timer;
 125   //
 126   // It is used to maintain the parent-child relationship between
 127   // mtftp driver and udp driver.
 128   //
 129   UDP_IO                        *DummyUdpIo;
 130 };
 131
 132 typedef struct {
 133   EFI_SERVICE_BINDING_PROTOCOL  *ServiceBinding;
 134   UINTN                         NumberOfChildren;
 135   EFI_HANDLE                    *ChildHandleBuffer;
 136 } MTFTP6_DESTROY_CHILD_IN_HANDLE_BUF_CONTEXT;
 137
 138 /**
 139   Returns the current operating mode data for the MTFTP6 instance.
 140
 141   The GetModeData() function returns the current operating mode and
 142   cached data packet for the MTFTP6 instance.
 143
 144   @param[in]  This               Pointer to the EFI_MTFTP6_PROTOCOL instance.
 145   @param[out] ModeData           The buffer in which the EFI MTFTPv6 Protocol driver mode
 146                                  data is returned.
 147
 148   @retval  EFI_SUCCESS           The configuration data was returned successfully.
 149   @retval  EFI_OUT_OF_RESOURCES  The required mode data could not be allocated.
 150   @retval  EFI_INVALID_PARAMETER This is NULL, or ModeData is NULL.
 151
 152 **/
 153 EFI_STATUS
 154 EFIAPI
 155 EfiMtftp6GetModeData (
 156   IN  EFI_MTFTP6_PROTOCOL    *This,
 157   OUT EFI_MTFTP6_MODE_DATA   *ModeData
 158   );
 159
 160 /**
 161   Initializes, changes, or resets the default operational setting for
 162   this EFI MTFTPv6 Protocol driver instance.
 163
 164   The Configure() function is used to set and change the configuration
 165   data for this EFI MTFTPv6 Protocol driver instance. The configuration
 166   data can be reset to startup defaults by calling Configure() with
 167   MtftpConfigData set to NULL. Whenever the instance is reset, any
 168   pending operation is aborted. By changing the EFI MTFTPv6 Protocol
 169   driver instance configuration data, the client can connect to
 170   different MTFTPv6 servers. The configuration parameters in
 171   MtftpConfigData are used as the default parameters in later MTFTPv6
 172   operations and can be overridden in later operations.
 173
 174   @param[in]  This               Pointer to the EFI_MTFTP6_PROTOCOL instance.
 175   @param[in]  MtftpConfigData    Pointer to the configuration data structure.
 176
 177   @retval  EFI_SUCCESS           The EFI MTFTPv6 Protocol instance was configured successfully.
 178   @retval  EFI_INVALID_PARAMETER One or more following conditions are TRUE:
 179                                  - This is NULL.
 180                                  - MtftpConfigData.StationIp is neither zero nor one
 181                                    of the configured IP addresses in the underlying IPv6 driver.
 182                                  - MtftpCofigData.ServerIp is not a valid IPv6 unicast address.
 183                                  Note: It does not match the UEFI 2.3 Specification.
 184   @retval  EFI_ACCESS_DENIED     - The configuration could not be changed at this time because there
 185                                    is some MTFTP background operation in progress.
 186                                  - MtftpCofigData.LocalPort is already in use.
 187                                  Note: It does not match the UEFI 2.3 Specification.
 188   @retval  EFI_NO_MAPPING        The underlying IPv6 driver was responsible for choosing a source
 189                                  address for this instance, but no source address was available for use.
 190   @retval  EFI_OUT_OF_RESOURCES  The EFI MTFTPv6 Protocol driver instance data could not be
 191                                  allocated.
 192                                  Note: It is not defined in the UEFI 2.3 Specification.
 193   @retval  EFI_DEVICE_ERROR      An unexpected system or network error occurred. The EFI
 194                                  MTFTPv6 Protocol driver instance is not configured.
 195                                  Note: It is not defined in the UEFI 2.3 Specification.
 196
 197 **/
 198 EFI_STATUS
 199 EFIAPI
 200 EfiMtftp6Configure (
 201   IN EFI_MTFTP6_PROTOCOL    *This,
 202   IN EFI_MTFTP6_CONFIG_DATA *MtftpConfigData     OPTIONAL
 203   );
 204
 205 /**
 206   Get the information of the download from the server.
 207
 208   The GetInfo() function assembles an MTFTPv6 request packet
 209   with options, sends it to the MTFTPv6 server, and may return
 210   an MTFTPv6 OACK, MTFTPv6 ERROR, or ICMP ERROR packet. Retries
 211   occur only if no response packets are received from the MTFTPv6
 212   server before the timeout expires.
 213
 214   @param[in]  This               Pointer to the EFI_MTFTP6_PROTOCOL instance.
 215   @param[in]  OverrideData       Data that is used to override the existing parameters. If NULL, the
 216                                  default parameters that were set in the EFI_MTFTP6_PROTOCOL.Configure()
 217                                  function are used.
 218   @param[in]  Filename           Pointer to null-terminated ASCII file name string.
 219   @param[in]  ModeStr            Pointer to null-terminated ASCII mode string. If NULL, octet will be used
 220   @param[in]  OptionCount        Number of option/value string pairs in OptionList.
 221   @param[in]  OptionList         Pointer to array of option/value string pairs. Ignored if
 222                                  OptionCount is zero.
 223   @param[out] PacketLength       The number of bytes in the returned packet.
 224   @param[out] Packet             The pointer to the received packet. This buffer must be freed by
 225                                  the caller.
 226
 227   @retval  EFI_SUCCESS              An MTFTPv6 OACK packet was received and is in the Packet.
 228                                     Note: It does not match the UEFI 2.3 Specification.
 229   @retval  EFI_INVALID_PARAMETER    One or more of the following conditions is TRUE:
 230                                     - This is NULL.
 231                                     - Filename is NULL.
 232                                     - OptionCount is not zero and OptionList is NULL.
 233                                     - One or more options in OptionList have wrong format.
 234                                     - PacketLength is NULL.
 235                                     - OverrideData.ServerIp is not a valid unicast IPv6 address.
 236   @retval  EFI_UNSUPPORTED          One or more options in the OptionList are unsupported by
 237                                     this implementation.
 238   @retval  EFI_NOT_STARTED          The EFI MTFTPv6 Protocol driver has not been started.
 239   @retval  EFI_NO_MAPPING           The underlying IPv6 driver was responsible for choosing a source
 240                                     address for this instance, but no source address was available for use.
 241   @retval  EFI_ACCESS_DENIED        The previous operation has not completed yet.
 242   @retval  EFI_OUT_OF_RESOURCES     Required system resources could not be allocated.
 243   @retval  EFI_TFTP_ERROR           An MTFTPv6 ERROR packet was received and is in the Packet.
 244   @retval  EFI_NETWORK_UNREACHABLE  An ICMP network unreachable error packet was received, and the Packet is set to NULL.
 245                                     Note: It is not defined in the UEFI 2.3 Specification.
 246   @retval  EFI_HOST_UNREACHABLE     An ICMP host unreachable error packet was received, and the Packet is set to NULL.
 247                                     Note: It is not defined in the UEFI 2.3 Specification.
 248   @retval  EFI_PROTOCOL_UNREACHABLE An ICMP protocol unreachable error packet was received, and the Packet is set to NULL.
 249                                     Note: It is not defined in the UEFI 2.3 Specification.
 250   @retval  EFI_PORT_UNREACHABLE     An ICMP port unreachable error packet was received, and the Packet is set to NULL.
 251   @retval  EFI_ICMP_ERROR           Some other ICMP ERROR packet was received, and the Packet is set to NULL.
 252                                     Note: It does not match the UEFI 2.3 Specification.
 253   @retval  EFI_PROTOCOL_ERROR       An unexpected MTFTPv6 packet was received and is in the Packet.
 254   @retval  EFI_TIMEOUT              No responses were received from the MTFTPv6 server.
 255   @retval  EFI_DEVICE_ERROR         An unexpected network error or system error occurred.
 256
 257 **/
 258 EFI_STATUS
 259 EFIAPI
 260 EfiMtftp6GetInfo (
 261   IN  EFI_MTFTP6_PROTOCOL      *This,
 262   IN  EFI_MTFTP6_OVERRIDE_DATA *OverrideData         OPTIONAL,
 263   IN  UINT8                    *Filename,
 264   IN  UINT8                    *ModeStr              OPTIONAL,
 265   IN  UINT8                    OptionCount,
 266   IN  EFI_MTFTP6_OPTION        *OptionList           OPTIONAL,
 267   OUT UINT32                   *PacketLength,
 268   OUT EFI_MTFTP6_PACKET        **Packet              OPTIONAL
 269   );
 270
 271 /**
 272   Parse the options in an MTFTPv6 OACK packet.
 273
 274   The ParseOptions() function parses the option fields in an MTFTPv6 OACK
 275   packet and returns the number of options that were found, and optionally,
 276   a list of pointers to the options in the packet. If one or more of the
 277   option fields are not valid, then EFI_PROTOCOL_ERROR is returned and
 278   *OptionCount and *OptionList stop at the last valid option.
 279
 280   @param[in]  This               Pointer to the EFI_MTFTP6_PROTOCOL instance.
 281   @param[in]  PacketLen          Length of the OACK packet to be parsed.
 282   @param[in]  Packet             Pointer to the OACK packet to be parsed.
 283   @param[out] OptionCount        Pointer to the number of options in the following OptionList.
 284   @param[out] OptionList         Pointer to EFI_MTFTP6_OPTION storage. Each pointer in the
 285                                  OptionList points to the corresponding MTFTP option buffer
 286                                  in the Packet. Call the EFI Boot Service FreePool() to
 287                                  release the OptionList if the options in this OptionList
 288                                  are not needed any more.
 289
 290   @retval  EFI_SUCCESS           The OACK packet was valid and the OptionCount, and
 291                                  OptionList parameters have been updated.
 292   @retval  EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
 293                                  - PacketLen is 0.
 294                                  - Packet is NULL or Packet is not a valid MTFTPv6 packet.
 295                                  - OptionCount is NULL.
 296   @retval  EFI_NOT_FOUND         No options were found in the OACK packet.
 297   @retval  EFI_OUT_OF_RESOURCES  Storage for the OptionList array can not be allocated.
 298   @retval  EFI_PROTOCOL_ERROR    One or more of the option fields is invalid.
 299
 300 **/
 301 EFI_STATUS
 302 EFIAPI
 303 EfiMtftp6ParseOptions (
 304   IN     EFI_MTFTP6_PROTOCOL    *This,
 305   IN     UINT32                 PacketLen,
 306   IN     EFI_MTFTP6_PACKET      *Packet,
 307   OUT    UINT32                 *OptionCount,
 308   OUT    EFI_MTFTP6_OPTION      **OptionList          OPTIONAL
 309   );
 310
 311 /**
 312   Download a file from an MTFTPv6 server.
 313
 314   The ReadFile() function is used to initialize and start an MTFTPv6 download
 315   process and optionally wait for completion. When the download operation
 316   completes, whether successfully or not, the Token.Status field is updated
 317   by the EFI MTFTPv6 Protocol driver, and then Token.Event is signaled if it
 318   is not NULL.
 319   Data can be downloaded from the MTFTPv6 server into either of the following
 320   locations:
 321   - A fixed buffer that is pointed to by Token.Buffer.
 322   - A download service function that is pointed to by Token.CheckPacket.
 323   If both Token.Buffer and Token.CheckPacket are used, then Token.CheckPacket
 324   will be called first. If the call is successful, the packet will be stored
 325   in Token.Buffer.
 326
 327   @param[in]  This               Pointer to the EFI_MTFTP6_PROTOCOL instance.
 328   @param[in]  Token              Pointer to the token structure to provide the parameters that are
 329                                  used in this operation.
 330
 331   @retval  EFI_SUCCESS              The data file has been transferred successfully.
 332   @retval  EFI_OUT_OF_RESOURCES     Required system resources could not be allocated.
 333   @retval  EFI_BUFFER_TOO_SMALL     BufferSize is not zero but not large enough to hold the
 334                                     downloaded data in downloading process.
 335                                     Note: It does not match the UEFI 2.3 Specification.
 336   @retval  EFI_ABORTED              Current operation is aborted by user.
 337   @retval  EFI_NETWORK_UNREACHABLE  An ICMP network unreachable error packet was received.
 338                                     Note: It is not defined in the UEFI 2.3 Specification.
 339   @retval  EFI_HOST_UNREACHABLE     An ICMP host unreachable error packet was received.
 340                                     Note: It is not defined in the UEFI 2.3 Specification.
 341   @retval  EFI_PROTOCOL_UNREACHABLE An ICMP protocol unreachable error packet was received.
 342                                     Note: It is not defined in the UEFI 2.3 Specification.
 343   @retval  EFI_PORT_UNREACHABLE     An ICMP port unreachable error packet was received.
 344                                     Note: It is not defined in the UEFI 2.3 Specification.
 345   @retval  EFI_ICMP_ERROR           An ICMP ERROR packet was received.
 346   @retval  EFI_TIMEOUT              No responses were received from the MTFTPv6 server.
 347   @retval  EFI_TFTP_ERROR           An MTFTPv6 ERROR packet was received.
 348   @retval  EFI_DEVICE_ERROR         An unexpected network error or system error occurred.
 349
 350 **/
 351 EFI_STATUS
 352 EFIAPI
 353 EfiMtftp6ReadFile (
 354   IN EFI_MTFTP6_PROTOCOL    *This,
 355   IN EFI_MTFTP6_TOKEN       *Token
 356   );
 357
 358 /**
 359   Send a file to an MTFTPv6 server.
 360
 361   The WriteFile() function is used to initialize an uploading operation
 362   with the given option list, and optionally, wait for completion. If one
 363   or more of the options is not supported by the server, the unsupported
 364   options are ignored and a standard TFTP process starts instead. When
 365   the upload process completes, whether successfully or not, Token.Event
 366   is signaled, and the EFI MTFTPv6 Protocol driver updates Token.Status.
 367   The caller can supply the data to be uploaded in the following two modes:
 368   - Through the user-provided buffer.
 369   - Through a callback function.
 370   With the user-provided buffer, the Token.BufferSize field indicates
 371   the length of the buffer, and the driver will upload the data in the
 372   buffer. With an EFI_MTFTP6_PACKET_NEEDED callback function, the driver
 373   will call this callback function to get more data from the user to upload.
 374
 375   @param[in]  This               Pointer to the EFI_MTFTP6_PROTOCOL instance.
 376   @param[in]  Token              Pointer to the token structure to provide the parameters that are
 377                                  used in this operation.
 378
 379   @retval  EFI_SUCCESS           The upload session has started.
 380   @retval  EFI_UNSUPPORTED       The operation is not supported by this implementation.
 381   @retval  EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
 382                                  - This is NULL.
 383                                  - Token is NULL.
 384                                  - Token.Filename is NULL.
 385                                  - Token.OptionCount is not zero and Token.OptionList is NULL.
 386                                  - One or more options in Token.OptionList have wrong format.
 387                                  - Token.Buffer and Token.PacketNeeded are both NULL.
 388                                  - Token.OverrideData.ServerIp is not valid unicast IPv6 addresses.
 389   @retval  EFI_UNSUPPORTED       One or more options in the Token.OptionList are not
 390                                  supported by this implementation.
 391   @retval  EFI_NOT_STARTED       The EFI MTFTPv6 Protocol driver has not been started.
 392   @retval  EFI_NO_MAPPING        The underlying IPv6 driver was responsible for choosing a source
 393                                  address for this instance, but no source address was available for use.
 394   @retval  EFI_ALREADY_STARTED   This Token is already being used in another MTFTPv6 session.
 395   @retval  EFI_OUT_OF_RESOURCES  Required system resources could not be allocated.
 396   @retval  EFI_ACCESS_DENIED     The previous operation has not completed yet.
 397   @retval  EFI_DEVICE_ERROR      An unexpected network error or system error occurred.
 398
 399 **/
 400 EFI_STATUS
 401 EFIAPI
 402 EfiMtftp6WriteFile (
 403   IN EFI_MTFTP6_PROTOCOL    *This,
 404   IN EFI_MTFTP6_TOKEN       *Token
 405   );
 406
 407 /**
 408   Download a data file directory from an MTFTPv6 server.
 409
 410   The ReadDirectory() function is used to return a list of files on the
 411   MTFTPv6 server that are logically (or operationally) related to
 412   Token.Filename. The directory request packet that is sent to the server
 413   is built with the option list that was provided by caller, if present.
 414   The file information that the server returns is put into either of
 415   the following locations:
 416   - A fixed buffer that is pointed to by Token.Buffer.
 417   - A download service function that is pointed to by Token.CheckPacket.
 418   If both Token.Buffer and Token.CheckPacket are used, then Token.CheckPacket
 419   will be called first. If the call is successful, the packet will be stored
 420   in Token.Buffer.
 421
 422   @param[in]  This               Pointer to the EFI_MTFTP6_PROTOCOL instance.
 423   @param[in]  Token              Pointer to the token structure to provide the parameters that are
 424                                  used in this operation.
 425
 426   @retval  EFI_SUCCESS           The MTFTPv6 related file "directory" has been downloaded.
 427   @retval  EFI_UNSUPPORTED       The EFI MTFTPv6 Protocol driver does not support this function.
 428   @retval  EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
 429                                  - This is NULL.
 430                                  - Token is NULL.
 431                                  - Token.Filename is NULL.
 432                                  - Token.OptionCount is not zero and Token.OptionList is NULL.
 433                                  - One or more options in Token.OptionList have wrong format.
 434                                  - Token.Buffer and Token.CheckPacket are both NULL.
 435                                  - Token.OverrideData.ServerIp is not valid unicast IPv6 addresses.
 436   @retval  EFI_UNSUPPORTED       One or more options in the Token.OptionList are not
 437                                  supported by this implementation.
 438   @retval  EFI_NOT_STARTED       The EFI MTFTPv6 Protocol driver has not been started.
 439   @retval  EFI_NO_MAPPING        The underlying IPv6 driver was responsible for choosing a source
 440                                  address for this instance, but no source address was available for use.
 441   @retval  EFI_ALREADY_STARTED   This Token is already being used in another MTFTPv6 session.
 442   @retval  EFI_OUT_OF_RESOURCES  Required system resources could not be allocated.
 443   @retval  EFI_ACCESS_DENIED     The previous operation has not completed yet.
 444   @retval  EFI_DEVICE_ERROR      An unexpected network error or system error occurred.
 445
 446 **/
 447 EFI_STATUS
 448 EFIAPI
 449 EfiMtftp6ReadDirectory (
 450   IN EFI_MTFTP6_PROTOCOL        *This,
 451   IN EFI_MTFTP6_TOKEN           *Token
 452   );
 453
 454 /**
 455   Polls for incoming data packets and processes outgoing data packets.
 456
 457   The Poll() function can be used by network drivers and applications
 458   to increase the rate that data packets are moved between the
 459   communications device and the transmit and receive queues.In some
 460   systems, the periodic timer event in the managed network driver may
 461   not poll the underlying communications device fast enough to transmit
 462   and/or receive all data packets without missing incoming packets or
 463   dropping outgoing packets. Drivers and applications that are
 464   experiencing packet loss should try calling the Poll() function
 465   more often.
 466
 467   @param[in]  This                   The MTFTP6 protocol instance.
 468
 469
 470   @retval  EFI_SUCCESS           Incoming or outgoing data was processed.
 471   @retval  EFI_NOT_STARTED       This EFI MTFTPv6 Protocol instance has not been started.
 472   @retval  EFI_INVALID_PARAMETER This is NULL.
 473   @retval  EFI_DEVICE_ERROR      An unexpected system or network error occurred.
 474   @retval  EFI_TIMEOUT           Data was dropped out of the transmit and/or receive queue.
 475                                  Consider increasing the polling rate.
 476
 477 **/
 478 EFI_STATUS
 479 EFIAPI
 480 EfiMtftp6Poll (
 481   IN EFI_MTFTP6_PROTOCOL    *This
 482   );
 483
 484 #endif