MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dispatcher.c

   1 /** @file
   2   Tcp request dispatcher implementation.
   3
   4 Copyright (c) 2005 - 2009, 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<BR>
   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 #include "Tcp4Main.h"
  16
  17 #define TCP_COMP_VAL(Min, Max, Default, Val) \
  18   ((((Val) <= (Max)) && ((Val) >= (Min))) ? (Val) : (Default))
  19
  20 /**
  21   Add or remove a route entry in the IP route table associated with this TCP instance.
  22
  23   @param  Tcb                   Pointer to the TCP_CB of this TCP instance.
  24   @param  RouteInfo             Pointer to the route info to be processed.
  25
  26   @retval EFI_SUCCESS           The operation completed successfully.
  27   @retval EFI_NOT_STARTED       The driver instance has not been started.
  28   @retval EFI_NO_MAPPING        When using the default address, configuration(DHCP,
  29                                 BOOTP, RARP, etc.) is not finished yet.
  30   @retval EFI_OUT_OF_RESOURCES  Could not add the entry to the routing table.
  31   @retval EFI_NOT_FOUND         This route is not in the routing table
  32                                 (when RouteInfo->DeleteRoute is TRUE).
  33   @retval EFI_ACCESS_DENIED     The route is already defined in the routing table
  34                                 (when RouteInfo->DeleteRoute is FALSE).
  35 **/
  36 EFI_STATUS
  37 Tcp4Route (
  38   IN TCP_CB           *Tcb,
  39   IN TCP4_ROUTE_INFO  *RouteInfo
  40   )
  41 {
  42   EFI_IP4_PROTOCOL  *Ip;
  43
  44   Ip = Tcb->IpInfo->Ip;
  45
  46   ASSERT (Ip != NULL);
  47
  48   return Ip->Routes (
  49               Ip,
  50               RouteInfo->DeleteRoute,
  51               RouteInfo->SubnetAddress,
  52               RouteInfo->SubnetMask,
  53               RouteInfo->GatewayAddress
  54               );
  55
  56 }
  57
  58
  59 /**
  60   Get the operational settings of this TCP instance.
  61
  62   @param  Tcb                    Pointer to the TCP_CB of this TCP instance.
  63   @param  Mode                   Pointer to the buffer to store the operational
  64                                  settings.
  65
  66   @retval EFI_SUCCESS            The mode data is read.
  67   @retval EFI_NOT_STARTED        No configuration data is available because this
  68                                  instance hasn't been started.
  69
  70 **/
  71 EFI_STATUS
  72 Tcp4GetMode (
  73   IN     TCP_CB         *Tcb,
  74   IN OUT TCP4_MODE_DATA *Mode
  75   )
  76 {
  77   SOCKET                *Sock;
  78   EFI_TCP4_CONFIG_DATA  *ConfigData;
  79   EFI_TCP4_ACCESS_POINT *AccessPoint;
  80   EFI_TCP4_OPTION       *Option;
  81   EFI_IP4_PROTOCOL      *Ip;
  82
  83   Sock = Tcb->Sk;
  84
  85   if (!SOCK_IS_CONFIGURED (Sock) && (Mode->Tcp4ConfigData != NULL)) {
  86     return EFI_NOT_STARTED;
  87   }
  88
  89   if (Mode->Tcp4State != NULL) {
  90     *(Mode->Tcp4State) = (EFI_TCP4_CONNECTION_STATE) Tcb->State;
  91   }
  92
  93   if (Mode->Tcp4ConfigData != NULL) {
  94
  95     ConfigData                      = Mode->Tcp4ConfigData;
  96     AccessPoint                     = &(ConfigData->AccessPoint);
  97     Option                          = ConfigData->ControlOption;
  98
  99     ConfigData->TypeOfService       = Tcb->Tos;
 100     ConfigData->TimeToLive          = Tcb->Ttl;
 101
 102     AccessPoint->UseDefaultAddress  = Tcb->UseDefaultAddr;
 103
 104     CopyMem (&AccessPoint->StationAddress, &Tcb->LocalEnd.Ip, sizeof (EFI_IPv4_ADDRESS));
 105     AccessPoint->SubnetMask         = Tcb->SubnetMask;
 106     AccessPoint->StationPort        = NTOHS (Tcb->LocalEnd.Port);
 107
 108     CopyMem (&AccessPoint->RemoteAddress, &Tcb->RemoteEnd.Ip, sizeof (EFI_IPv4_ADDRESS));
 109     AccessPoint->RemotePort         = NTOHS (Tcb->RemoteEnd.Port);
 110     AccessPoint->ActiveFlag         = (BOOLEAN) (Tcb->State != TCP_LISTEN);
 111
 112     if (Option != NULL) {
 113       Option->ReceiveBufferSize       = GET_RCV_BUFFSIZE (Tcb->Sk);
 114       Option->SendBufferSize          = GET_SND_BUFFSIZE (Tcb->Sk);
 115       Option->MaxSynBackLog           = GET_BACKLOG (Tcb->Sk);
 116
 117       Option->ConnectionTimeout       = Tcb->ConnectTimeout / TCP_TICK_HZ;
 118       Option->DataRetries             = Tcb->MaxRexmit;
 119       Option->FinTimeout              = Tcb->FinWait2Timeout / TCP_TICK_HZ;
 120       Option->TimeWaitTimeout         = Tcb->TimeWaitTimeout / TCP_TICK_HZ;
 121       Option->KeepAliveProbes         = Tcb->MaxKeepAlive;
 122       Option->KeepAliveTime           = Tcb->KeepAliveIdle / TCP_TICK_HZ;
 123       Option->KeepAliveInterval       = Tcb->KeepAlivePeriod / TCP_TICK_HZ;
 124
 125       Option->EnableNagle         = (BOOLEAN) (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_NAGLE));
 126       Option->EnableTimeStamp     = (BOOLEAN) (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_TS));
 127       Option->EnableWindowScaling = (BOOLEAN) (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_WS));
 128
 129       Option->EnableSelectiveAck      = FALSE;
 130       Option->EnablePathMtuDiscovery  = FALSE;
 131     }
 132   }
 133
 134   Ip = Tcb->IpInfo->Ip;
 135   ASSERT (Ip != NULL);
 136
 137   return Ip->GetModeData (Ip, Mode->Ip4ModeData, Mode->MnpConfigData, Mode->SnpModeData);
 138 }
 139
 140
 141 /**
 142   If AP->StationPort isn't zero, check whether the access point
 143   is registered, else generate a random station port for this
 144   access point.
 145
 146   @param  AP                     Pointer to the access point.
 147
 148   @retval EFI_SUCCESS            The check is passed or the port is assigned.
 149   @retval EFI_INVALID_PARAMETER  The non-zero station port is already used.
 150   @retval EFI_OUT_OF_RESOURCES   No port can be allocated.
 151
 152 **/
 153 EFI_STATUS
 154 Tcp4Bind (
 155   IN EFI_TCP4_ACCESS_POINT *AP
 156   )
 157 {
 158   BOOLEAN Cycle;
 159
 160   if (0 != AP->StationPort) {
 161     //
 162     // check if a same endpoint is bound
 163     //
 164     if (TcpFindTcbByPeer (&AP->StationAddress, AP->StationPort)) {
 165
 166       return EFI_INVALID_PARAMETER;
 167     }
 168   } else {
 169     //
 170     // generate a random port
 171     //
 172     Cycle = FALSE;
 173
 174     if (TCP4_PORT_USER_RESERVED == mTcp4RandomPort) {
 175       mTcp4RandomPort = TCP4_PORT_KNOWN;
 176     }
 177
 178     mTcp4RandomPort++;
 179
 180     while (TcpFindTcbByPeer (&AP->StationAddress, mTcp4RandomPort)) {
 181
 182       mTcp4RandomPort++;
 183
 184       if (mTcp4RandomPort <= TCP4_PORT_KNOWN) {
 185
 186         if (Cycle) {
 187           DEBUG ((EFI_D_ERROR, "Tcp4Bind: no port can be allocated "
 188             "for this pcb\n"));
 189
 190           return EFI_OUT_OF_RESOURCES;
 191         }
 192
 193         mTcp4RandomPort = TCP4_PORT_KNOWN + 1;
 194
 195         Cycle = TRUE;
 196       }
 197
 198     }
 199
 200     AP->StationPort = mTcp4RandomPort;
 201   }
 202
 203   return EFI_SUCCESS;
 204 }
 205
 206
 207 /**
 208   Flush the Tcb add its associated protocols.
 209
 210   @param  Tcb                    Pointer to the TCP_CB to be flushed.
 211
 212 **/
 213 VOID
 214 Tcp4FlushPcb (
 215   IN TCP_CB *Tcb
 216   )
 217 {
 218   SOCKET           *Sock;
 219   TCP4_PROTO_DATA  *TcpProto;
 220
 221   IpIoConfigIp (Tcb->IpInfo, NULL);
 222
 223   Sock     = Tcb->Sk;
 224   TcpProto = (TCP4_PROTO_DATA *) Sock->ProtoReserved;
 225
 226   if (SOCK_IS_CONFIGURED (Sock)) {
 227     RemoveEntryList (&Tcb->List);
 228
 229     //
 230     // Uninstall the device path protocl.
 231     //
 232     gBS->UninstallProtocolInterface (
 233            Sock->SockHandle,
 234            &gEfiDevicePathProtocolGuid,
 235            Sock->DevicePath
 236            );
 237     gBS->FreePool (Sock->DevicePath);
 238
 239     TcpSetVariableData (TcpProto->TcpService);
 240   }
 241
 242   NetbufFreeList (&Tcb->SndQue);
 243   NetbufFreeList (&Tcb->RcvQue);
 244 }
 245
 246 /**
 247   Attach a Pcb to the socket.
 248
 249   @param  Sk                     Pointer to the socket of this TCP instance.
 250
 251   @retval EFI_SUCCESS            The operation is completed successfully.
 252   @retval EFI_OUT_OF_RESOURCES   Failed due to resource limit.
 253
 254 **/
 255 EFI_STATUS
 256 Tcp4AttachPcb (
 257   IN SOCKET  *Sk
 258   )
 259 {
 260   TCP_CB            *Tcb;
 261   TCP4_PROTO_DATA   *ProtoData;
 262   IP_IO             *IpIo;
 263
 264   Tcb = AllocateZeroPool (sizeof (TCP_CB));
 265
 266   if (Tcb == NULL) {
 267
 268     DEBUG ((EFI_D_ERROR, "Tcp4ConfigurePcb: failed to allocate a TCB\n"));
 269
 270     return EFI_OUT_OF_RESOURCES;
 271   }
 272
 273   ProtoData  = (TCP4_PROTO_DATA *) Sk->ProtoReserved;
 274   IpIo       = ProtoData->TcpService->IpIo;
 275
 276   //
 277   // Create an IpInfo for this Tcb.
 278   //
 279   Tcb->IpInfo = IpIoAddIp (IpIo);
 280   if (Tcb->IpInfo == NULL) {
 281
 282     gBS->FreePool (Tcb);
 283     return EFI_OUT_OF_RESOURCES;
 284   }
 285
 286   InitializeListHead (&Tcb->List);
 287   InitializeListHead (&Tcb->SndQue);
 288   InitializeListHead (&Tcb->RcvQue);
 289
 290   Tcb->State        = TCP_CLOSED;
 291   Tcb->Sk           = Sk;
 292   ProtoData->TcpPcb = Tcb;
 293
 294   return EFI_SUCCESS;
 295 }
 296
 297 /**
 298   Detach the Pcb of the socket.
 299
 300   @param  Sk                     Pointer to the socket of this TCP instance.
 301
 302 **/
 303 VOID
 304 Tcp4DetachPcb (
 305   IN SOCKET  *Sk
 306   )
 307 {
 308   TCP4_PROTO_DATA  *ProtoData;
 309   TCP_CB           *Tcb;
 310
 311   ProtoData = (TCP4_PROTO_DATA *) Sk->ProtoReserved;
 312   Tcb       = ProtoData->TcpPcb;
 313
 314   ASSERT (Tcb != NULL);
 315
 316   Tcp4FlushPcb (Tcb);
 317
 318   IpIoRemoveIp (ProtoData->TcpService->IpIo, Tcb->IpInfo);
 319
 320   gBS->FreePool (Tcb);
 321
 322   ProtoData->TcpPcb = NULL;
 323 }
 324
 325
 326 /**
 327   Configure the Pcb using CfgData.
 328
 329   @param  Sk                     Pointer to the socket of this TCP instance.
 330   @param  CfgData                Pointer to the TCP configuration data.
 331
 332   @retval EFI_SUCCESS            The operation is completed successfully.
 333   @retval EFI_INVALID_PARAMETER  A same access point has been configured in
 334                                  another TCP instance.
 335   @retval EFI_OUT_OF_RESOURCES   Failed due to resource limit.
 336
 337 **/
 338 EFI_STATUS
 339 Tcp4ConfigurePcb (
 340   IN SOCKET               *Sk,
 341   IN EFI_TCP4_CONFIG_DATA *CfgData
 342   )
 343 {
 344   EFI_IP4_CONFIG_DATA IpCfgData;
 345   EFI_STATUS          Status;
 346   EFI_TCP4_OPTION     *Option;
 347   TCP4_PROTO_DATA     *TcpProto;
 348   TCP_CB              *Tcb;
 349
 350   ASSERT ((CfgData != NULL) && (Sk != NULL) && (Sk->SockHandle != NULL));
 351
 352   TcpProto = (TCP4_PROTO_DATA *) Sk->ProtoReserved;
 353   Tcb      = TcpProto->TcpPcb;
 354
 355   ASSERT (Tcb != NULL);
 356
 357   //
 358   // Add Ip for send pkt to the peer
 359   //
 360   CopyMem (&IpCfgData, &mIp4IoDefaultIpConfigData, sizeof (IpCfgData));
 361   IpCfgData.DefaultProtocol   = EFI_IP_PROTO_TCP;
 362   IpCfgData.UseDefaultAddress = CfgData->AccessPoint.UseDefaultAddress;
 363   IpCfgData.StationAddress    = CfgData->AccessPoint.StationAddress;
 364   IpCfgData.SubnetMask        = CfgData->AccessPoint.SubnetMask;
 365   IpCfgData.ReceiveTimeout    = (UINT32) (-1);
 366
 367   //
 368   // Configure the IP instance this Tcb consumes.
 369   //
 370   Status = IpIoConfigIp (Tcb->IpInfo, &IpCfgData);
 371   if (EFI_ERROR (Status)) {
 372     goto OnExit;
 373   }
 374
 375   //
 376   // Get the default address info if the instance is configured to use default address.
 377   //
 378   if (CfgData->AccessPoint.UseDefaultAddress) {
 379     CfgData->AccessPoint.StationAddress = IpCfgData.StationAddress;
 380     CfgData->AccessPoint.SubnetMask     = IpCfgData.SubnetMask;
 381   }
 382
 383   //
 384   // check if we can bind this endpoint in CfgData
 385   //
 386   Status = Tcp4Bind (&(CfgData->AccessPoint));
 387
 388   if (EFI_ERROR (Status)) {
 389     DEBUG ((EFI_D_ERROR, "Tcp4ConfigurePcb: Bind endpoint failed "
 390       "with %r\n", Status));
 391
 392     goto OnExit;
 393   }
 394
 395   //
 396   // Initalize the operating information in this Tcb
 397   //
 398   ASSERT (Tcb->State == TCP_CLOSED &&
 399     IsListEmpty (&Tcb->SndQue) &&
 400     IsListEmpty (&Tcb->RcvQue));
 401
 402   TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_NO_KEEPALIVE);
 403   Tcb->State            = TCP_CLOSED;
 404
 405   Tcb->SndMss           = 536;
 406   Tcb->RcvMss           = TcpGetRcvMss (Sk);
 407
 408   Tcb->SRtt             = 0;
 409   Tcb->Rto              = 3 * TCP_TICK_HZ;
 410
 411   Tcb->CWnd             = Tcb->SndMss;
 412   Tcb->Ssthresh         = 0xffffffff;
 413
 414   Tcb->CongestState     = TCP_CONGEST_OPEN;
 415
 416   Tcb->KeepAliveIdle    = TCP_KEEPALIVE_IDLE_MIN;
 417   Tcb->KeepAlivePeriod  = TCP_KEEPALIVE_PERIOD;
 418   Tcb->MaxKeepAlive     = TCP_MAX_KEEPALIVE;
 419   Tcb->MaxRexmit        = TCP_MAX_LOSS;
 420   Tcb->FinWait2Timeout  = TCP_FIN_WAIT2_TIME;
 421   Tcb->TimeWaitTimeout  = TCP_TIME_WAIT_TIME;
 422   Tcb->ConnectTimeout   = TCP_CONNECT_TIME;
 423
 424   //
 425   // initialize Tcb in the light of CfgData
 426   //
 427   Tcb->Ttl            = CfgData->TimeToLive;
 428   Tcb->Tos            = CfgData->TypeOfService;
 429
 430   Tcb->UseDefaultAddr = CfgData->AccessPoint.UseDefaultAddress;
 431
 432   CopyMem (&Tcb->LocalEnd.Ip, &CfgData->AccessPoint.StationAddress, sizeof (IP4_ADDR));
 433   Tcb->LocalEnd.Port  = HTONS (CfgData->AccessPoint.StationPort);
 434   Tcb->SubnetMask     = CfgData->AccessPoint.SubnetMask;
 435
 436   if (CfgData->AccessPoint.ActiveFlag) {
 437     CopyMem (&Tcb->RemoteEnd.Ip, &CfgData->AccessPoint.RemoteAddress, sizeof (IP4_ADDR));
 438     Tcb->RemoteEnd.Port = HTONS (CfgData->AccessPoint.RemotePort);
 439   } else {
 440     Tcb->RemoteEnd.Ip   = 0;
 441     Tcb->RemoteEnd.Port = 0;
 442   }
 443
 444   Option              = CfgData->ControlOption;
 445
 446   if (Option != NULL) {
 447     SET_RCV_BUFFSIZE (
 448       Sk,
 449       (UINT32) (TCP_COMP_VAL (
 450                   TCP_RCV_BUF_SIZE_MIN,
 451                   TCP_RCV_BUF_SIZE,
 452                   TCP_RCV_BUF_SIZE,
 453                   Option->ReceiveBufferSize
 454                   )
 455                )
 456       );
 457     SET_SND_BUFFSIZE (
 458       Sk,
 459       (UINT32) (TCP_COMP_VAL (
 460                   TCP_SND_BUF_SIZE_MIN,
 461                   TCP_SND_BUF_SIZE,
 462                   TCP_SND_BUF_SIZE,
 463                   Option->SendBufferSize
 464                   )
 465                )
 466       );
 467
 468     SET_BACKLOG (
 469       Sk,
 470       (UINT32) (TCP_COMP_VAL (
 471                   TCP_BACKLOG_MIN,
 472                   TCP_BACKLOG,
 473                   TCP_BACKLOG,
 474                   Option->MaxSynBackLog
 475                   )
 476                )
 477       );
 478
 479     Tcb->MaxRexmit = (UINT16) TCP_COMP_VAL (
 480                                 TCP_MAX_LOSS_MIN,
 481                                 TCP_MAX_LOSS,
 482                                 TCP_MAX_LOSS,
 483                                 Option->DataRetries
 484                                 );
 485     Tcb->FinWait2Timeout = TCP_COMP_VAL (
 486                               TCP_FIN_WAIT2_TIME,
 487                               TCP_FIN_WAIT2_TIME_MAX,
 488                               TCP_FIN_WAIT2_TIME,
 489                               (UINT32) (Option->FinTimeout * TCP_TICK_HZ)
 490                               );
 491
 492     if (Option->TimeWaitTimeout != 0) {
 493       Tcb->TimeWaitTimeout = TCP_COMP_VAL (
 494                                TCP_TIME_WAIT_TIME,
 495                                TCP_TIME_WAIT_TIME_MAX,
 496                                TCP_TIME_WAIT_TIME,
 497                                (UINT32) (Option->TimeWaitTimeout * TCP_TICK_HZ)
 498                                );
 499     } else {
 500       Tcb->TimeWaitTimeout = 0;
 501     }
 502
 503     if (Option->KeepAliveProbes != 0) {
 504       TCP_CLEAR_FLG (Tcb->CtrlFlag, TCP_CTRL_NO_KEEPALIVE);
 505
 506       Tcb->MaxKeepAlive = (UINT8) TCP_COMP_VAL (
 507                                     TCP_MAX_KEEPALIVE_MIN,
 508                                     TCP_MAX_KEEPALIVE,
 509                                     TCP_MAX_KEEPALIVE,
 510                                     Option->KeepAliveProbes
 511                                     );
 512       Tcb->KeepAliveIdle = TCP_COMP_VAL (
 513                              TCP_KEEPALIVE_IDLE_MIN,
 514                              TCP_KEEPALIVE_IDLE_MAX,
 515                              TCP_KEEPALIVE_IDLE_MIN,
 516                              (UINT32) (Option->KeepAliveTime * TCP_TICK_HZ)
 517                              );
 518       Tcb->KeepAlivePeriod = TCP_COMP_VAL (
 519                                TCP_KEEPALIVE_PERIOD_MIN,
 520                                TCP_KEEPALIVE_PERIOD,
 521                                TCP_KEEPALIVE_PERIOD,
 522                                (UINT32) (Option->KeepAliveInterval * TCP_TICK_HZ)
 523                                );
 524     }
 525
 526     Tcb->ConnectTimeout = TCP_COMP_VAL (
 527                             TCP_CONNECT_TIME_MIN,
 528                             TCP_CONNECT_TIME,
 529                             TCP_CONNECT_TIME,
 530                             (UINT32) (Option->ConnectionTimeout * TCP_TICK_HZ)
 531                             );
 532
 533     if (Option->EnableNagle == FALSE) {
 534       TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_NO_NAGLE);
 535     }
 536
 537     if (Option->EnableTimeStamp == FALSE) {
 538       TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_NO_TS);
 539     }
 540
 541     if (Option->EnableWindowScaling == FALSE) {
 542       TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_NO_WS);
 543     }
 544   }
 545
 546   //
 547   // The socket is bound, the <SrcIp, SrcPort, DstIp, DstPort> is
 548   // determined, construct the IP device path and install it.
 549   //
 550   Status = TcpInstallDevicePath (Sk);
 551   if (EFI_ERROR (Status)) {
 552     goto OnExit;
 553   }
 554
 555   //
 556   // update state of Tcb and socket
 557   //
 558   if (CfgData->AccessPoint.ActiveFlag == FALSE) {
 559
 560     TcpSetState (Tcb, TCP_LISTEN);
 561     SockSetState (Sk, SO_LISTENING);
 562
 563     Sk->ConfigureState = SO_CONFIGURED_PASSIVE;
 564   } else {
 565
 566     Sk->ConfigureState = SO_CONFIGURED_ACTIVE;
 567   }
 568
 569   TcpInsertTcb (Tcb);
 570
 571 OnExit:
 572
 573   return Status;
 574 }
 575
 576
 577 /**
 578   The procotol handler provided to the socket layer, used to
 579   dispatch the socket level requests by calling the corresponding
 580   TCP layer functions.
 581
 582   @param  Sock                   Pointer to the socket of this TCP instance.
 583   @param  Request                The code of this operation request.
 584   @param  Data                   Pointer to the operation specific data passed in
 585                                  together with the operation request.
 586
 587   @retval EFI_SUCCESS            The socket request is completed successfully.
 588   @retval other                  The error status returned by the corresponding TCP
 589                                  layer function.
 590
 591 **/
 592 EFI_STATUS
 593 Tcp4Dispatcher (
 594   IN SOCKET                  *Sock,
 595   IN SOCK_REQUEST            Request,
 596   IN VOID                    *Data    OPTIONAL
 597   )
 598 {
 599   TCP_CB            *Tcb;
 600   TCP4_PROTO_DATA   *ProtoData;
 601   EFI_IP4_PROTOCOL  *Ip;
 602
 603   ProtoData = (TCP4_PROTO_DATA *) Sock->ProtoReserved;
 604   Tcb       = ProtoData->TcpPcb;
 605
 606   switch (Request) {
 607   case SOCK_POLL:
 608     Ip = (EFI_IP4_PROTOCOL *) (ProtoData->TcpService->IpIo->Ip);
 609     Ip->Poll (Ip);
 610     break;
 611
 612   case SOCK_CONSUMED:
 613     //
 614     // After user received data from socket buffer, socket will
 615     // notify TCP using this message to give it a chance to send out
 616     // window update information
 617     //
 618     ASSERT (Tcb != NULL);
 619     TcpOnAppConsume (Tcb);
 620     break;
 621
 622   case SOCK_SND:
 623
 624     ASSERT (Tcb != NULL);
 625     TcpOnAppSend (Tcb);
 626     break;
 627
 628   case SOCK_CLOSE:
 629
 630     TcpOnAppClose (Tcb);
 631
 632     break;
 633
 634   case SOCK_ABORT:
 635
 636     TcpOnAppAbort (Tcb);
 637
 638     break;
 639
 640   case SOCK_SNDPUSH:
 641     Tcb->SndPsh = TcpGetMaxSndNxt (Tcb) + GET_SND_DATASIZE (Tcb->Sk);
 642     TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_SND_PSH);
 643
 644     break;
 645
 646   case SOCK_SNDURG:
 647     Tcb->SndUp = TcpGetMaxSndNxt (Tcb) + GET_SND_DATASIZE (Tcb->Sk) - 1;
 648     TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_SND_URG);
 649
 650     break;
 651
 652   case SOCK_CONNECT:
 653
 654     TcpOnAppConnect (Tcb);
 655
 656     break;
 657
 658   case SOCK_ATTACH:
 659
 660     return Tcp4AttachPcb (Sock);
 661
 662     break;
 663
 664   case SOCK_FLUSH:
 665
 666     Tcp4FlushPcb (Tcb);
 667
 668     break;
 669
 670   case SOCK_DETACH:
 671
 672     Tcp4DetachPcb (Sock);
 673
 674     break;
 675
 676   case SOCK_CONFIGURE:
 677
 678     return Tcp4ConfigurePcb (
 679             Sock,
 680             (EFI_TCP4_CONFIG_DATA *) Data
 681             );
 682
 683     break;
 684
 685   case SOCK_MODE:
 686
 687     ASSERT ((Data != NULL) && (Tcb != NULL));
 688
 689     return Tcp4GetMode (Tcb, (TCP4_MODE_DATA *) Data);
 690
 691     break;
 692
 693   case SOCK_ROUTE:
 694
 695     ASSERT ((Data != NULL) && (Tcb != NULL));
 696
 697     return Tcp4Route (Tcb, (TCP4_ROUTE_INFO *) Data);
 698
 699   default:
 700     return EFI_UNSUPPORTED;
 701   }
 702
 703   return EFI_SUCCESS;
 704
 705 }