MdeModulePkg/Universal/Network/Udp4Dxe/Udp4Impl.h

   1 /** @file
   2   EFI UDPv4 protocol implementation.
   3
   4 Copyright (c) 2006 - 2007, Intel Corporation.<BR>
   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 #ifndef _UDP4_IMPL_H_
  16 #define _UDP4_IMPL_H_
  17
  18 #include <Uefi.h>
  19
  20 #include <Protocol/Ip4.h>
  21 #include <Protocol/Udp4.h>
  22
  23 #include <Library/IpIoLib.h>
  24 #include <Library/DebugLib.h>
  25 #include <Library/UefiRuntimeServicesTableLib.h>
  26 #include <Library/UefiDriverEntryPoint.h>
  27 #include <Library/UefiBootServicesTableLib.h>
  28 #include <Library/BaseLib.h>
  29 #include <Library/UefiLib.h>
  30 #include <Library/BaseMemoryLib.h>
  31 #include <Library/MemoryAllocationLib.h>
  32 #include <Library/TimerLib.h>
  33
  34 #include "Udp4Driver.h"
  35
  36
  37 extern EFI_COMPONENT_NAME_PROTOCOL     gUdp4ComponentName;
  38 extern EFI_COMPONENT_NAME2_PROTOCOL    gUdp4ComponentName2;
  39 extern EFI_SERVICE_BINDING_PROTOCOL    mUdp4ServiceBinding;
  40 extern EFI_UDP4_PROTOCOL               mUdp4Protocol;
  41 extern UINT16                          mUdp4RandomPort;
  42
  43 #define ICMP_ERROR_PACKET_LENGTH  8
  44
  45 #define UDP4_TIMEOUT_INTERVAL (10 * TICKS_PER_MS)  // 10 milliseconds
  46
  47 #define UDP4_HEADER_SIZE      sizeof (EFI_UDP4_HEADER)
  48 #define UDP4_MAX_DATA_SIZE    65507
  49
  50 #define UDP4_PORT_KNOWN       1024
  51
  52 #define UDP4_SERVICE_DATA_SIGNATURE  SIGNATURE_32('U', 'd', 'p', '4')
  53
  54 #define UDP4_SERVICE_DATA_FROM_THIS(a) \
  55   CR ( \
  56   (a), \
  57   UDP4_SERVICE_DATA, \
  58   ServiceBinding, \
  59   UDP4_SERVICE_DATA_SIGNATURE \
  60   )
  61
  62 typedef struct _UDP4_SERVICE_DATA_ {
  63   UINT32                        Signature;
  64   EFI_SERVICE_BINDING_PROTOCOL  ServiceBinding;
  65   EFI_HANDLE                    ImageHandle;
  66   EFI_HANDLE                    ControllerHandle;
  67   LIST_ENTRY                    ChildrenList;
  68   UINTN                         ChildrenNumber;
  69   IP_IO                         *IpIo;
  70
  71   EFI_EVENT                     TimeoutEvent;
  72
  73   CHAR16                        *MacString;
  74 } UDP4_SERVICE_DATA;
  75
  76 #define UDP4_INSTANCE_DATA_SIGNATURE  SIGNATURE_32('U', 'd', 'p', 'I')
  77
  78 #define UDP4_INSTANCE_DATA_FROM_THIS(a) \
  79   CR ( \
  80   (a), \
  81   UDP4_INSTANCE_DATA, \
  82   Udp4Proto, \
  83   UDP4_INSTANCE_DATA_SIGNATURE \
  84   )
  85
  86 typedef struct _UDP4_INSTANCE_DATA_ {
  87   UINT32                Signature;
  88   LIST_ENTRY            Link;
  89
  90   UDP4_SERVICE_DATA     *Udp4Service;
  91   EFI_UDP4_PROTOCOL     Udp4Proto;
  92   EFI_UDP4_CONFIG_DATA  ConfigData;
  93   EFI_HANDLE            ChildHandle;
  94   BOOLEAN               Configured;
  95   BOOLEAN               IsNoMapping;
  96
  97   NET_MAP               TxTokens;
  98   NET_MAP               RxTokens;
  99
 100   NET_MAP               McastIps;
 101
 102   LIST_ENTRY            RcvdDgramQue;
 103   LIST_ENTRY            DeliveredDgramQue;
 104
 105   UINT16                HeadSum;
 106
 107   EFI_STATUS            IcmpError;
 108
 109   IP_IO_IP_INFO         *IpInfo;
 110
 111   BOOLEAN               Destroyed;
 112 } UDP4_INSTANCE_DATA;
 113
 114 typedef struct _UDP4_RXDATA_WRAP_ {
 115   LIST_ENTRY             Link;
 116   NET_BUF                *Packet;
 117   UINT32                 TimeoutTick;
 118   EFI_UDP4_RECEIVE_DATA  RxData;
 119 } UDP4_RXDATA_WRAP;
 120
 121 /**
 122   Reads the current operational settings.
 123
 124   The GetModeData() function copies the current operational settings of this EFI
 125   UDPv4 Protocol instance into user-supplied buffers. This function is used
 126   optionally to retrieve the operational mode data of underlying networks or
 127   drivers.
 128
 129   @param  This           Pointer to the EFI_UDP4_PROTOCOL instance.
 130   @param  Udp4ConfigData Pointer to the buffer to receive the current configuration data.
 131   @param  Ip4ModeData    Pointer to the EFI IPv4 Protocol mode data structure.
 132   @param  MnpConfigData  Pointer to the managed network configuration data structure.
 133   @param  SnpModeData    Pointer to the simple network mode data structure.
 134
 135   @retval EFI_SUCCESS           The mode data was read.
 136   @retval EFI_NOT_STARTED       When Udp4ConfigData is queried, no configuration data is
 137                                 available because this instance has not been started.
 138   @retval EFI_INVALID_PARAMETER This is NULL.
 139
 140 **/
 141 EFI_STATUS
 142 EFIAPI
 143 Udp4GetModeData (
 144   IN  EFI_UDP4_PROTOCOL                *This,
 145   OUT EFI_UDP4_CONFIG_DATA             *Udp4ConfigData OPTIONAL,
 146   OUT EFI_IP4_MODE_DATA                *Ip4ModeData    OPTIONAL,
 147   OUT EFI_MANAGED_NETWORK_CONFIG_DATA  *MnpConfigData  OPTIONAL,
 148   OUT EFI_SIMPLE_NETWORK_MODE          *SnpModeData    OPTIONAL
 149   );
 150
 151 /**
 152   Initializes, changes, or resets the operational parameters for this instance of the EFI UDPv4
 153   Protocol.
 154
 155   The Configure() function is used to do the following:
 156   * Initialize and start this instance of the EFI UDPv4 Protocol.
 157   * Change the filtering rules and operational parameters.
 158   * Reset this instance of the EFI UDPv4 Protocol.
 159   Until these parameters are initialized, no network traffic can be sent or
 160   received by this instance. This instance can be also reset by calling Configure()
 161   with UdpConfigData set to NULL. Once reset, the receiving queue and transmitting
 162   queue are flushed and no traffic is allowed through this instance.
 163   With different parameters in UdpConfigData, Configure() can be used to bind
 164   this instance to specified port.
 165
 166   @param[in]  This              Pointer to the EFI_UDP4_PROTOCOL instance.
 167   @param[in]  UdpConfigData     Pointer to the buffer to receive the current configuration data.
 168
 169   @retval EFI_SUCCESS           The configuration settings were set, changed, or reset successfully.
 170   @retval EFI_NO_MAPPING        When using a default address, configuration (DHCP, BOOTP,
 171                                 RARP, etc.) is not finished yet.
 172   @retval EFI_INVALID_PARAMETER One or more following conditions are TRUE:
 173   @retval EFI_ALREADY_STARTED   The EFI UDPv4 Protocol instance is already started/configured
 174                                 and must be stopped/reset before it can be reconfigured.
 175   @retval EFI_ACCESS_DENIED     UdpConfigData. AllowDuplicatePort is FALSE
 176                                 and UdpConfigData.StationPort is already used by
 177                                 other instance.
 178   @retval EFI_OUT_OF_RESOURCES  The EFI UDPv4 Protocol driver cannot allocate memory for this
 179                                 EFI UDPv4 Protocol instance.
 180   @retval EFI_DEVICE_ERROR      An unexpected network or system error occurred and this instance
 181                                  was not opened.
 182
 183 **/
 184 EFI_STATUS
 185 EFIAPI
 186 Udp4Configure (
 187   IN EFI_UDP4_PROTOCOL     *This,
 188   IN EFI_UDP4_CONFIG_DATA  *UdpConfigData OPTIONAL
 189   );
 190
 191 /**
 192   Joins and leaves multicast groups.
 193
 194   The Groups() function is used to enable and disable the multicast group
 195   filtering. If the JoinFlag is FALSE and the MulticastAddress is NULL, then all
 196   currently joined groups are left.
 197
 198   @param[in]  This              Pointer to the EFI_UDP4_PROTOCOL instance.
 199   @param[in]  JoinFlag          Set to TRUE to join a multicast group. Set to FALSE to leave one
 200                                 or all multicast groups.
 201   @param[in]  MulticastAddress  Pointer to multicast group address to join or leave.
 202
 203   @retval EFI_SUCCESS           The operation completed successfully.
 204   @retval EFI_NOT_STARTED       The EFI UDPv4 Protocol instance has not been started.
 205   @retval EFI_NO_MAPPING        When using a default address, configuration (DHCP, BOOTP,
 206                                 RARP, etc.) is not finished yet.
 207   @retval EFI_OUT_OF_RESOURCES  Could not allocate resources to join the group.
 208   @retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
 209                                 - This is NULL.
 210                                 - JoinFlag is TRUE and MulticastAddress is NULL.
 211                                 - JoinFlag is TRUE and *MulticastAddress is not
 212                                   a valid multicast address.
 213   @retval EFI_ALREADY_STARTED   The group address is already in the group table (when
 214                                 JoinFlag is TRUE).
 215   @retval EFI_NOT_FOUND         The group address is not in the group table (when JoinFlag is
 216                                 FALSE).
 217   @retval EFI_DEVICE_ERROR      An unexpected system or network error occurred.
 218
 219 **/
 220 EFI_STATUS
 221 EFIAPI
 222 Udp4Groups (
 223   IN EFI_UDP4_PROTOCOL  *This,
 224   IN BOOLEAN            JoinFlag,
 225   IN EFI_IPv4_ADDRESS   *MulticastAddress OPTIONAL
 226   );
 227
 228 /**
 229   Adds and deletes routing table entries.
 230
 231   The Routes() function adds a route to or deletes a route from the routing table.
 232   Routes are determined by comparing the SubnetAddress with the destination IP
 233   address and arithmetically AND-ing it with the SubnetMask. The gateway address
 234   must be on the same subnet as the configured station address.
 235   The default route is added with SubnetAddress and SubnetMask both set to 0.0.0.0.
 236   The default route matches all destination IP addresses that do not match any
 237   other routes.
 238   A zero GatewayAddress is a nonroute. Packets are sent to the destination IP
 239   address if it can be found in the Address Resolution Protocol (ARP) cache or
 240   on the local subnet. One automatic nonroute entry will be inserted into the
 241   routing table for outgoing packets that are addressed to a local subnet
 242   (gateway address of 0.0.0.0).
 243   Each instance of the EFI UDPv4 Protocol has its own independent routing table.
 244   Instances of the EFI UDPv4 Protocol that use the default IP address will also
 245   have copies of the routing table provided by the EFI_IP4_CONFIG_PROTOCOL. These
 246   copies will be updated automatically whenever the IP driver reconfigures its
 247   instances; as a result, the previous modification to these copies will be lost.
 248
 249   @param[in]  This              Pointer to the EFI_UDP4_PROTOCOL instance.
 250   @param[in]  DeleteRoute       Set to TRUE to delete this route from the routing table.
 251                                 Set to FALSE to add this route to the routing table.
 252   @param[in]  SubnetAddress     The destination network address that needs to be routed.
 253   @param[in]  SubnetMask        The subnet mask of SubnetAddress.
 254   @param[in]  GatewayAddress    The gateway IP address for this route.
 255
 256   @retval EFI_SUCCESS           The operation completed successfully.
 257   @retval EFI_NOT_STARTED       The EFI UDPv4 Protocol instance has not been started.
 258   @retval EFI_NO_MAPPING        When using a default address, configuration (DHCP, BOOTP,
 259                                 - RARP, etc.) is not finished yet.
 260   @retval EFI_INVALID_PARAMETER One or more parameters are invalid.
 261   @retval EFI_OUT_OF_RESOURCES  Could not add the entry to the routing table.
 262   @retval EFI_NOT_FOUND         This route is not in the routing table.
 263   @retval EFI_ACCESS_DENIED     The route is already defined in the routing table.
 264
 265 **/
 266 EFI_STATUS
 267 EFIAPI
 268 Udp4Routes (
 269   IN EFI_UDP4_PROTOCOL  *This,
 270   IN BOOLEAN            DeleteRoute,
 271   IN EFI_IPv4_ADDRESS   *SubnetAddress,
 272   IN EFI_IPv4_ADDRESS   *SubnetMask,
 273   IN EFI_IPv4_ADDRESS   *GatewayAddress
 274   );
 275
 276 /**
 277   Queues outgoing data packets into the transmit queue.
 278
 279   The Transmit() function places a sending request to this instance of the EFI
 280   UDPv4 Protocol, alongside the transmit data that was filled by the user. Whenever
 281   the packet in the token is sent out or some errors occur, the Token.Event will
 282   be signaled and Token.Status is updated. Providing a proper notification function
 283   and context for the event will enable the user to receive the notification and
 284   transmitting status.
 285
 286   @param[in]  This              Pointer to the EFI_UDP4_PROTOCOL instance.
 287   @param[in]  Token             Pointer to the completion token that will be placed into the
 288                                 transmit queue.
 289
 290   @retval EFI_SUCCESS           The data has been queued for transmission.
 291   @retval EFI_NOT_STARTED       This EFI UDPv4 Protocol instance has not been started.
 292   @retval EFI_NO_MAPPING        When using a default address, configuration (DHCP, BOOTP,
 293                                 RARP, etc.) is not finished yet.
 294   @retval EFI_INVALID_PARAMETER One or more parameters are invalid.
 295   @retval EFI_ACCESS_DENIED     The transmit completion token with the same
 296                                 Token.Event was already in the transmit queue.
 297   @retval EFI_NOT_READY         The completion token could not be queued because the
 298                                 transmit queue is full.
 299   @retval EFI_OUT_OF_RESOURCES  Could not queue the transmit data.
 300   @retval EFI_NOT_FOUND         There is no route to the destination network or address.
 301   @retval EFI_BAD_BUFFER_SIZE   The data length is greater than the maximum UDP packet
 302                                 size. Or the length of the IP header + UDP header + data
 303                                 length is greater than MTU if DoNotFragment is TRUE.
 304
 305 **/
 306 EFI_STATUS
 307 EFIAPI
 308 Udp4Transmit (
 309   IN EFI_UDP4_PROTOCOL          *This,
 310   IN EFI_UDP4_COMPLETION_TOKEN  *Token
 311   );
 312
 313 /**
 314   Places an asynchronous receive request into the receiving queue.
 315
 316   The Receive() function places a completion token into the receive packet queue.
 317   This function is always asynchronous.
 318   The caller must fill in the Token.Event field in the completion token, and this
 319   field cannot be NULL. When the receive operation completes, the EFI UDPv4 Protocol
 320   driver updates the Token.Status and Token.Packet.RxData fields and the Token.Event
 321   is signaled. Providing a proper notification function and context for the event
 322   will enable the user to receive the notification and receiving status. That
 323   notification function is guaranteed to not be re-entered.
 324
 325   @param[in]  This              Pointer to the EFI_UDP4_PROTOCOL instance.
 326   @param[in]  Token             Pointer to a token that is associated with
 327                                 the receive data descriptor.
 328
 329   @retval EFI_SUCCESS           The receive completion token was cached.
 330   @retval EFI_NOT_STARTED       This EFI UDPv4 Protocol instance has not been started.
 331   @retval EFI_NO_MAPPING        When using a default address, configuration (DHCP, BOOTP, RARP, etc.)
 332                                 is not finished yet.
 333   @retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
 334   @retval EFI_OUT_OF_RESOURCES  The receive completion token could not be queued due to a lack of system
 335                                 resources (usually memory).
 336   @retval EFI_DEVICE_ERROR      An unexpected system or network error occurred.
 337   @retval EFI_ACCESS_DENIED     A receive completion token with the same Token.Event was already in
 338                                 the receive queue.
 339   @retval EFI_NOT_READY         The receive request could not be queued because the receive queue is full.
 340
 341 **/
 342 EFI_STATUS
 343 EFIAPI
 344 Udp4Receive (
 345   IN EFI_UDP4_PROTOCOL          *This,
 346   IN EFI_UDP4_COMPLETION_TOKEN  *Token
 347   );
 348
 349 /**
 350   Aborts an asynchronous transmit or receive request.
 351
 352   The Cancel() function is used to abort a pending transmit or receive request.
 353   If the token is in the transmit or receive request queues, after calling this
 354   function, Token.Status will be set to EFI_ABORTED and then Token.Event will be
 355   signaled. If the token is not in one of the queues, which usually means that
 356   the asynchronous operation has completed, this function will not signal the
 357   token and EFI_NOT_FOUND is returned.
 358
 359   @param[in]  This  Pointer to the EFI_UDP4_PROTOCOL instance.
 360   @param[in]  Token Pointer to a token that has been issued by
 361                     EFI_UDP4_PROTOCOL.Transmit() or
 362                     EFI_UDP4_PROTOCOL.Receive().If NULL, all pending
 363                     tokens are aborted.
 364
 365   @retval  EFI_SUCCESS           The asynchronous I/O request was aborted and Token.Event
 366                                  was signaled. When Token is NULL, all pending requests are
 367                                  aborted and their events are signaled.
 368   @retval  EFI_INVALID_PARAMETER This is NULL.
 369   @retval  EFI_NOT_STARTED       This instance has not been started.
 370   @retval  EFI_NO_MAPPING        When using the default address, configuration (DHCP, BOOTP,
 371                                  RARP, etc.) is not finished yet.
 372   @retval  EFI_NOT_FOUND         When Token is not NULL, the asynchronous I/O request was
 373                                  not found in the transmit or receive queue. It has either completed
 374                                  or was not issued by Transmit() and Receive().
 375
 376 **/
 377 EFI_STATUS
 378 EFIAPI
 379 Udp4Cancel (
 380   IN EFI_UDP4_PROTOCOL          *This,
 381   IN EFI_UDP4_COMPLETION_TOKEN  *Token OPTIONAL
 382   );
 383
 384 /**
 385   Polls for incoming data packets and processes outgoing data packets.
 386
 387   The Poll() function can be used by network drivers and applications to increase
 388   the rate that data packets are moved between the communications device and the
 389   transmit and receive queues.
 390   In some systems, the periodic timer event in the managed network driver may not
 391   poll the underlying communications device fast enough to transmit and/or receive
 392   all data packets without missing incoming packets or dropping outgoing packets.
 393   Drivers and applications that are experiencing packet loss should try calling
 394   the Poll() function more often.
 395
 396   @param[in]  This  Pointer to the EFI_UDP4_PROTOCOL instance.
 397
 398   @retval EFI_SUCCESS           Incoming or outgoing data was processed.
 399   @retval EFI_INVALID_PARAMETER This is NULL.
 400   @retval EFI_DEVICE_ERROR      An unexpected system or network error occurred.
 401   @retval EFI_TIMEOUT           Data was dropped out of the transmit and/or receive queue.
 402
 403 **/
 404 EFI_STATUS
 405 EFIAPI
 406 Udp4Poll (
 407   IN EFI_UDP4_PROTOCOL  *This
 408   );
 409
 410 /**
 411   Create the Udp service context data.
 412
 413   @param  Udp4Service            Pointer to the UDP4_SERVICE_DATA.
 414   @param  ImageHandle            The image handle of this udp4 driver.
 415   @param  ControllerHandle       The controller handle this udp4 driver binds on.
 416
 417   @retval EFI_SUCCESS            The udp4 service context data is created and
 418                                  initialized.
 419   @retval EFI_OUT_OF_RESOURCES   Cannot allocate memory.
 420   @retval other                  Other error occurs.
 421
 422 **/
 423 EFI_STATUS
 424 Udp4CreateService (
 425   IN OUT UDP4_SERVICE_DATA  *Udp4Service,
 426   IN     EFI_HANDLE         ImageHandle,
 427   IN     EFI_HANDLE         ControllerHandle
 428   );
 429
 430 /**
 431   Clean the Udp service context data.
 432
 433   @param[in]  Udp4Service            Pointer to the UDP4_SERVICE_DATA.
 434
 435 **/
 436 VOID
 437 Udp4CleanService (
 438   IN UDP4_SERVICE_DATA  *Udp4Service
 439   );
 440
 441 /**
 442   This function intializes the new created udp instance.
 443
 444   @param  Udp4Service            Pointer to the UDP4_SERVICE_DATA.
 445   @param  Instance               Pointer to the un-initialized UDP4_INSTANCE_DATA.
 446
 447 **/
 448 VOID
 449 Udp4InitInstance (
 450   IN     UDP4_SERVICE_DATA   *Udp4Service,
 451   IN OUT UDP4_INSTANCE_DATA  *Instance
 452   );
 453
 454 /**
 455   This function cleans the udp instance.
 456
 457   @param[in]  Instance               Pointer to the UDP4_INSTANCE_DATA to clean.
 458
 459 **/
 460 VOID
 461 Udp4CleanInstance (
 462   IN UDP4_INSTANCE_DATA  *Instance
 463   );
 464
 465 /**
 466   This function tries to bind the udp instance according to the configured port
 467   allocation strategy.
 468
 469   @param  InstanceList           Pointer to the head of the list linking the udp
 470                                  instances.
 471   @param  ConfigData             Pointer to the ConfigData of the instance to be
 472                                  bound. ConfigData->StationPort will be assigned
 473                                  with an available port value on success.
 474
 475   @retval EFI_SUCCESS            The bound operation is completed successfully.
 476   @retval EFI_ACCESS_DENIED      The <Address, Port> specified by the ConfigData is
 477                                  already used by other instance.
 478   @retval EFI_OUT_OF_RESOURCES   No available port resources.
 479
 480 **/
 481 EFI_STATUS
 482 Udp4Bind (
 483   IN     LIST_ENTRY            *InstanceList,
 484   IN OUT EFI_UDP4_CONFIG_DATA  *ConfigData
 485   );
 486
 487 /**
 488   This function is used to check whether the NewConfigData has any un-reconfigurable
 489   parameters changed compared to the OldConfigData.
 490
 491   @param[in]  OldConfigData      Pointer to the current ConfigData the udp instance
 492                                  uses.
 493   @param[in]  NewConfigData      Pointer to the new ConfigData.
 494
 495   @retval TRUE     The instance is reconfigurable.
 496   @retval FALSE    Otherwise.
 497
 498 **/
 499 BOOLEAN
 500 Udp4IsReconfigurable (
 501   IN EFI_UDP4_CONFIG_DATA  *OldConfigData,
 502   IN EFI_UDP4_CONFIG_DATA  *NewConfigData
 503   );
 504
 505 /**
 506   This function builds the Ip4 configdata from the Udp4ConfigData.
 507
 508   @param[in]       Udp4ConfigData    Pointer to the EFI_UDP4_CONFIG_DATA.
 509   @param[in, out]  Ip4ConfigData     Pointer to the EFI_IP4_CONFIG_DATA.
 510
 511 **/
 512 VOID
 513 Udp4BuildIp4ConfigData (
 514   IN     EFI_UDP4_CONFIG_DATA  *Udp4ConfigData,
 515   IN OUT EFI_IP4_CONFIG_DATA   *Ip4ConfigData
 516   );
 517
 518 /**
 519   This function validates the TxToken, it returns the error code according to the spec.
 520
 521   @param[in]  Instance           Pointer to the udp instance context data.
 522   @param[in]  TxToken            Pointer to the token to be checked.
 523
 524   @retval EFI_SUCCESS            The TxToken is valid.
 525   @retval EFI_INVALID_PARAMETER  One or more of the following are TRUE: This is
 526                                  NULL. Token is NULL. Token.Event is NULL.
 527                                  Token.Packet.TxData is NULL.
 528                                  Token.Packet.TxData.FragmentCount is zero.
 529                                  Token.Packet.TxData.DataLength is not equal to the
 530                                  sum of fragment lengths. One or more of the
 531                                  Token.Packet.TxData.FragmentTable[].
 532                                  FragmentLength fields is zero. One or more of the
 533                                  Token.Packet.TxData.FragmentTable[].
 534                                  FragmentBuffer fields is NULL.
 535                                  Token.Packet.TxData. GatewayAddress is not a
 536                                  unicast IPv4 address if it is not NULL. One or
 537                                  more IPv4 addresses in Token.Packet.TxData.
 538                                  UdpSessionData are not valid unicast IPv4
 539                                  addresses if the UdpSessionData is not NULL.
 540   @retval EFI_BAD_BUFFER_SIZE    The data length is greater than the maximum UDP
 541                                  packet size.
 542
 543 **/
 544 EFI_STATUS
 545 Udp4ValidateTxToken (
 546   IN UDP4_INSTANCE_DATA         *Instance,
 547   IN EFI_UDP4_COMPLETION_TOKEN  *TxToken
 548   );
 549
 550 /**
 551   This function checks whether the specified Token duplicates with the one in the Map.
 552
 553   @param[in]  Map                Pointer to the NET_MAP.
 554   @param[in]  Item               Pointer to the NET_MAP_ITEM contain the pointer to
 555                                  the Token.
 556   @param[in]  Context            Pointer to the Token to be checked.
 557
 558   @retval EFI_SUCCESS            The Token specified by Context differs from the
 559                                  one in the Item.
 560   @retval EFI_ACCESS_DENIED      The Token duplicates with the one in the Item.
 561
 562 **/
 563 EFI_STATUS
 564 Udp4TokenExist (
 565   IN NET_MAP       *Map,
 566   IN NET_MAP_ITEM  *Item,
 567   IN VOID          *Context
 568   );
 569
 570 /**
 571   This function calculates the checksum for the Packet, utilizing the pre-calculated
 572   pseudo HeadSum to reduce some overhead.
 573
 574   @param[in]  Packet             Pointer to the NET_BUF contains the udp datagram.
 575   @param[in]  HeadSum            Checksum of the pseudo header execpt the length
 576                                  field.
 577
 578   @retval The 16-bit checksum of this udp datagram.
 579
 580 **/
 581 UINT16
 582 Udp4Checksum (
 583   IN NET_BUF *Packet,
 584   IN UINT16  HeadSum
 585   );
 586
 587 /**
 588   This function removes the specified Token from the TokenMap.
 589
 590   @param  TokenMap           Pointer to the NET_MAP containing the tokens.
 591   @param  Token              Pointer to the Token to be removed.
 592
 593   @retval EFI_SUCCESS            The specified Token is removed from the TokenMap.
 594   @retval EFI_NOT_FOUND          The specified Token is not found in the TokenMap.
 595
 596 **/
 597 EFI_STATUS
 598 Udp4RemoveToken (
 599   IN OUT NET_MAP                    *TokenMap,
 600   IN     EFI_UDP4_COMPLETION_TOKEN  *Token
 601   );
 602
 603 /**
 604   This function removes the multicast group specified by Arg from the Map.
 605
 606   @param  Map                    Pointer to the NET_MAP.
 607   @param  Item                   Pointer to the NET_MAP_ITEM.
 608   @param  Arg                    Pointer to the Arg, it's the pointer to a
 609                                  multicast IPv4 Address.
 610
 611   @retval EFI_SUCCESS            The multicast address is removed.
 612   @retval EFI_ABORTED            The specified multicast address is removed and the
 613                                  Arg is not NULL.
 614
 615 **/
 616 EFI_STATUS
 617 Udp4LeaveGroup (
 618   IN OUT NET_MAP       *Map,
 619   IN     NET_MAP_ITEM  *Item,
 620   IN     VOID          *Arg OPTIONAL
 621   );
 622
 623 /**
 624   This function removes all the Wrap datas in the RcvdDgramQue.
 625
 626   @param[in]  Instance           Pointer to the udp instance context data.
 627
 628 **/
 629 VOID
 630 Udp4FlushRcvdDgram (
 631   IN UDP4_INSTANCE_DATA  *Instance
 632   );
 633
 634 /**
 635   Cancel Udp4 tokens from the Udp4 instance.
 636
 637   @param[in]  Instance           Pointer to the udp instance context data.
 638   @param[in]  Token              Pointer to the token to be canceled, if NULL, all
 639                                  tokens in this instance will be cancelled.
 640
 641   @retval EFI_SUCCESS            The Token is cancelled.
 642   @retval EFI_NOT_FOUND          The Token is not found.
 643
 644 **/
 645 EFI_STATUS
 646 Udp4InstanceCancelToken (
 647   IN UDP4_INSTANCE_DATA         *Instance,
 648   IN EFI_UDP4_COMPLETION_TOKEN  *Token OPTIONAL
 649   );
 650
 651 /**
 652   This function delivers the received datagrams for the specified instance.
 653
 654   @param[in]  Instance               Pointer to the instance context data.
 655
 656 **/
 657 VOID
 658 Udp4InstanceDeliverDgram (
 659   IN UDP4_INSTANCE_DATA  *Instance
 660   );
 661
 662 /**
 663   This function reports the received ICMP error.
 664
 665   @param[in]  Instance               Pointer to the udp instance context data.
 666
 667 **/
 668 VOID
 669 Udp4ReportIcmpError (
 670   IN UDP4_INSTANCE_DATA  *Instance
 671   );
 672
 673 /**
 674   This function is a dummy ext-free function for the NET_BUF created for the output
 675   udp datagram.
 676
 677   @param[in]  Context                Pointer to the context data.
 678
 679 **/
 680 VOID
 681 Udp4NetVectorExtFree (
 682   VOID  *Context
 683   );
 684
 685 /**
 686   Set the Udp4 variable data.
 687
 688   @param  Udp4Service            Udp4 service data.
 689
 690   @retval EFI_OUT_OF_RESOURCES   There are not enough resources to set the
 691                                  variable.
 692   @retval EFI_SUCCESS            Set variable successfully.
 693   @retval other                  Set variable failed.
 694
 695 **/
 696 EFI_STATUS
 697 Udp4SetVariableData (
 698   IN UDP4_SERVICE_DATA  *Udp4Service
 699   );
 700
 701 /**
 702   Clear the variable and free the resource.
 703
 704   @param[[in]  Udp4Service            Udp4 service data.
 705
 706 **/
 707 VOID
 708 Udp4ClearVariableData (
 709   IN UDP4_SERVICE_DATA  *Udp4Service
 710   );
 711
 712 #endif
 713