NetworkPkg/TcpDxe/TcpDispatcher.c

   1 /** @file
   2   The implementation of a dispatch routine for processing TCP requests.
   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 #include "TcpMain.h"
  17
  18 /**
  19   Add or remove a route entry in the IP route table associated with this TCP instance.
  20
  21   @param[in]  Tcb               Pointer to the TCP_CB of this TCP instance.
  22   @param[in]  RouteInfo         Pointer to the route information to be processed.
  23
  24   @retval EFI_SUCCESS           The operation completed successfully.
  25   @retval EFI_NOT_STARTED       The driver instance has not been started.
  26   @retval EFI_NO_MAPPING        When using the default address, configuration(DHCP,
  27                                 BOOTP, RARP, etc.) is not finished yet.
  28   @retval EFI_OUT_OF_RESOURCES  Could not add the entry to the routing table.
  29   @retval EFI_NOT_FOUND         This route is not in the routing table
  30                                 (when RouteInfo->DeleteRoute is TRUE).
  31   @retval EFI_ACCESS_DENIED     The route is already defined in the routing table
  32                                 (when RouteInfo->DeleteRoute is FALSE).
  33 **/
  34 EFI_STATUS
  35 Tcp4Route (
  36   IN TCP_CB           *Tcb,
  37   IN TCP4_ROUTE_INFO  *RouteInfo
  38   )
  39 {
  40   IP_IO_IP_PROTOCOL   Ip;
  41
  42   Ip = Tcb->IpInfo->Ip;
  43
  44   ASSERT (Ip.Ip4!= NULL);
  45
  46   return Ip.Ip4->Routes (
  47                    Ip.Ip4,
  48                    RouteInfo->DeleteRoute,
  49                    RouteInfo->SubnetAddress,
  50                    RouteInfo->SubnetMask,
  51                    RouteInfo->GatewayAddress
  52                    );
  53
  54 }
  55
  56 /**
  57   Get the operational settings of this TCPv4 instance.
  58
  59   @param[in]       Tcb           Pointer to the TCP_CB of this TCP instance.
  60   @param[in, out]  Mode          Pointer to the buffer to store the operational
  61                                  settings.
  62
  63   @retval EFI_SUCCESS            The mode data was read.
  64   @retval EFI_NOT_STARTED        No configuration data is available because this
  65                                  instance hasn't been started.
  66
  67 **/
  68 EFI_STATUS
  69 Tcp4GetMode (
  70   IN     TCP_CB         *Tcb,
  71   IN OUT TCP4_MODE_DATA *Mode
  72   )
  73 {
  74   SOCKET                *Sock;
  75   EFI_TCP4_CONFIG_DATA  *ConfigData;
  76   EFI_TCP4_ACCESS_POINT *AccessPoint;
  77   EFI_TCP4_OPTION       *Option;
  78   EFI_IP4_PROTOCOL      *Ip;
  79
  80   Sock = Tcb->Sk;
  81
  82   if (!SOCK_IS_CONFIGURED (Sock) && (Mode->Tcp4ConfigData != NULL)) {
  83     return EFI_NOT_STARTED;
  84   }
  85
  86   if (Mode->Tcp4State != NULL) {
  87     *(Mode->Tcp4State) = (EFI_TCP4_CONNECTION_STATE) Tcb->State;
  88   }
  89
  90   if (Mode->Tcp4ConfigData != NULL) {
  91
  92     ConfigData                       = Mode->Tcp4ConfigData;
  93     AccessPoint                      = &(ConfigData->AccessPoint);
  94     Option                           = ConfigData->ControlOption;
  95
  96     ConfigData->TypeOfService        = Tcb->Tos;
  97     ConfigData->TimeToLive           = Tcb->Ttl;
  98
  99     AccessPoint->UseDefaultAddress   = Tcb->UseDefaultAddr;
 100
 101     CopyMem (&AccessPoint->StationAddress, &Tcb->LocalEnd.Ip, sizeof (EFI_IPv4_ADDRESS));
 102
 103     AccessPoint->SubnetMask          = Tcb->SubnetMask;
 104     AccessPoint->StationPort         = NTOHS (Tcb->LocalEnd.Port);
 105
 106     CopyMem (&AccessPoint->RemoteAddress, &Tcb->RemoteEnd.Ip, sizeof (EFI_IPv4_ADDRESS));
 107
 108     AccessPoint->RemotePort          = NTOHS (Tcb->RemoteEnd.Port);
 109     AccessPoint->ActiveFlag          = (BOOLEAN) (Tcb->State != TCP_LISTEN);
 110
 111     if (Option != NULL) {
 112       Option->ReceiveBufferSize      = GET_RCV_BUFFSIZE (Tcb->Sk);
 113       Option->SendBufferSize         = GET_SND_BUFFSIZE (Tcb->Sk);
 114       Option->MaxSynBackLog          = GET_BACKLOG (Tcb->Sk);
 115
 116       Option->ConnectionTimeout      = Tcb->ConnectTimeout / TCP_TICK_HZ;
 117       Option->DataRetries            = Tcb->MaxRexmit;
 118       Option->FinTimeout             = Tcb->FinWait2Timeout / TCP_TICK_HZ;
 119       Option->TimeWaitTimeout        = Tcb->TimeWaitTimeout / TCP_TICK_HZ;
 120       Option->KeepAliveProbes        = Tcb->MaxKeepAlive;
 121       Option->KeepAliveTime          = Tcb->KeepAliveIdle / TCP_TICK_HZ;
 122       Option->KeepAliveInterval      = Tcb->KeepAlivePeriod / TCP_TICK_HZ;
 123
 124       Option->EnableNagle            = (BOOLEAN) (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_NAGLE));
 125       Option->EnableTimeStamp        = (BOOLEAN) (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_TS));
 126       Option->EnableWindowScaling    = (BOOLEAN) (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_WS));
 127
 128       Option->EnableSelectiveAck     = FALSE;
 129       Option->EnablePathMtuDiscovery = FALSE;
 130     }
 131   }
 132
 133   Ip = Tcb->IpInfo->Ip.Ip4;
 134   ASSERT (Ip != NULL);
 135
 136   return Ip->GetModeData (Ip, Mode->Ip4ModeData, Mode->MnpConfigData, Mode->SnpModeData);
 137 }
 138
 139 /**
 140   Get the operational settings of this TCPv6 instance.
 141
 142   @param[in]       Tcb           Pointer to the TCP_CB of this TCP instance.
 143   @param[in, out]  Mode          Pointer to the buffer to store the operational
 144                                  settings.
 145
 146   @retval EFI_SUCCESS            The mode data was read.
 147   @retval EFI_NOT_STARTED        No configuration data is available because this
 148                                  instance hasn't been started.
 149
 150 **/
 151 EFI_STATUS
 152 Tcp6GetMode (
 153   IN     TCP_CB         *Tcb,
 154   IN OUT TCP6_MODE_DATA *Mode
 155   )
 156 {
 157   SOCKET                *Sock;
 158   EFI_TCP6_CONFIG_DATA  *ConfigData;
 159   EFI_TCP6_ACCESS_POINT *AccessPoint;
 160   EFI_TCP6_OPTION       *Option;
 161   EFI_IP6_PROTOCOL      *Ip;
 162
 163   Sock = Tcb->Sk;
 164
 165   if (!SOCK_IS_CONFIGURED (Sock) && (Mode->Tcp6ConfigData != NULL)) {
 166     return EFI_NOT_STARTED;
 167   }
 168
 169   if (Mode->Tcp6State != NULL) {
 170     *(Mode->Tcp6State) = (EFI_TCP6_CONNECTION_STATE) (Tcb->State);
 171   }
 172
 173   if (Mode->Tcp6ConfigData != NULL) {
 174
 175     ConfigData                       = Mode->Tcp6ConfigData;
 176     AccessPoint                      = &(ConfigData->AccessPoint);
 177     Option                           = ConfigData->ControlOption;
 178
 179     ConfigData->TrafficClass         = Tcb->Tos;
 180     ConfigData->HopLimit             = Tcb->Ttl;
 181
 182     AccessPoint->StationPort         = NTOHS (Tcb->LocalEnd.Port);
 183     AccessPoint->RemotePort          = NTOHS (Tcb->RemoteEnd.Port);
 184     AccessPoint->ActiveFlag          = (BOOLEAN) (Tcb->State != TCP_LISTEN);
 185
 186     IP6_COPY_ADDRESS (&AccessPoint->StationAddress, &Tcb->LocalEnd.Ip);
 187     IP6_COPY_ADDRESS (&AccessPoint->RemoteAddress, &Tcb->RemoteEnd.Ip);
 188
 189     if (Option != NULL) {
 190       Option->ReceiveBufferSize      = GET_RCV_BUFFSIZE (Tcb->Sk);
 191       Option->SendBufferSize         = GET_SND_BUFFSIZE (Tcb->Sk);
 192       Option->MaxSynBackLog          = GET_BACKLOG (Tcb->Sk);
 193
 194       Option->ConnectionTimeout      = Tcb->ConnectTimeout / TCP_TICK_HZ;
 195       Option->DataRetries            = Tcb->MaxRexmit;
 196       Option->FinTimeout             = Tcb->FinWait2Timeout / TCP_TICK_HZ;
 197       Option->TimeWaitTimeout        = Tcb->TimeWaitTimeout / TCP_TICK_HZ;
 198       Option->KeepAliveProbes        = Tcb->MaxKeepAlive;
 199       Option->KeepAliveTime          = Tcb->KeepAliveIdle / TCP_TICK_HZ;
 200       Option->KeepAliveInterval      = Tcb->KeepAlivePeriod / TCP_TICK_HZ;
 201
 202       Option->EnableNagle            = (BOOLEAN) (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_NAGLE));
 203       Option->EnableTimeStamp        = (BOOLEAN) (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_TS));
 204       Option->EnableWindowScaling    = (BOOLEAN) (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_WS));
 205
 206       Option->EnableSelectiveAck     = FALSE;
 207       Option->EnablePathMtuDiscovery = FALSE;
 208     }
 209   }
 210
 211   Ip = Tcb->IpInfo->Ip.Ip6;
 212   ASSERT (Ip != NULL);
 213
 214   return Ip->GetModeData (Ip, Mode->Ip6ModeData, Mode->MnpConfigData, Mode->SnpModeData);
 215 }
 216
 217 /**
 218   If TcpAp->StationPort isn't zero, check whether the access point
 219   is registered, else generate a random station port for this
 220   access point.
 221
 222   @param[in]  TcpAp              Pointer to the access point.
 223   @param[in]  IpVersion          IP_VERSION_4 or IP_VERSION_6
 224
 225   @retval EFI_SUCCESS            The check passed or the port is assigned.
 226   @retval EFI_INVALID_PARAMETER  The non-zero station port is already used.
 227   @retval EFI_OUT_OF_RESOURCES   No port can be allocated.
 228
 229 **/
 230 EFI_STATUS
 231 TcpBind (
 232   IN TCP_ACCESS_POINT  *TcpAp,
 233   IN UINT8             IpVersion
 234   )
 235 {
 236   BOOLEAN         Cycle;
 237   EFI_IP_ADDRESS  Local;
 238   UINT16          *Port;
 239   UINT16          *RandomPort;
 240
 241   if (IpVersion == IP_VERSION_4) {
 242     CopyMem (&Local, &TcpAp->Tcp4Ap.StationAddress, sizeof (EFI_IPv4_ADDRESS));
 243     Port       = &TcpAp->Tcp4Ap.StationPort;
 244     RandomPort = &mTcp4RandomPort;
 245   } else {
 246     IP6_COPY_ADDRESS (&Local, &TcpAp->Tcp6Ap.StationAddress);
 247     Port       = &TcpAp->Tcp6Ap.StationPort;
 248     RandomPort = &mTcp6RandomPort;
 249   }
 250
 251   if (0 != *Port) {
 252     //
 253     // Check if a same endpoing is bound.
 254     //
 255     if (TcpFindTcbByPeer (&Local, *Port, IpVersion)) {
 256
 257       return EFI_INVALID_PARAMETER;
 258     }
 259   } else {
 260     //
 261     // generate a random port
 262     //
 263     Cycle = FALSE;
 264
 265     if (TCP_PORT_USER_RESERVED == *RandomPort) {
 266       *RandomPort = TCP_PORT_KNOWN;
 267     }
 268
 269     (*RandomPort)++;
 270
 271     while (TcpFindTcbByPeer (&Local, *RandomPort, IpVersion)) {
 272       (*RandomPort)++;
 273
 274       if (*RandomPort <= TCP_PORT_KNOWN) {
 275         if (Cycle) {
 276           DEBUG (
 277             (EFI_D_ERROR,
 278             "TcpBind: no port can be allocated for this pcb\n")
 279             );
 280           return EFI_OUT_OF_RESOURCES;
 281         }
 282
 283         *RandomPort = TCP_PORT_KNOWN + 1;
 284
 285         Cycle       = TRUE;
 286       }
 287     }
 288
 289     *Port = *RandomPort;
 290   }
 291
 292   return EFI_SUCCESS;
 293 }
 294
 295 /**
 296   Flush the Tcb add its associated protocols.
 297
 298   @param[in, out]  Tcb      Pointer to the TCP_CB to be flushed.
 299
 300 **/
 301 VOID
 302 TcpFlushPcb (
 303   IN OUT TCP_CB *Tcb
 304   )
 305 {
 306   SOCKET                    *Sock;
 307   TCP_PROTO_DATA            *TcpProto;
 308
 309   IpIoConfigIp (Tcb->IpInfo, NULL);
 310
 311   Sock     = Tcb->Sk;
 312   TcpProto = (TCP_PROTO_DATA *) Sock->ProtoReserved;
 313
 314   if (SOCK_IS_CONFIGURED (Sock)) {
 315     RemoveEntryList (&Tcb->List);
 316
 317     if (Sock->DevicePath != NULL) {
 318       //
 319       // Uninstall the device path protocl.
 320       //
 321       gBS->UninstallProtocolInterface (
 322              Sock->SockHandle,
 323              &gEfiDevicePathProtocolGuid,
 324              Sock->DevicePath
 325              );
 326
 327       FreePool (Sock->DevicePath);
 328       Sock->DevicePath = NULL;
 329     }
 330
 331     TcpSetVariableData (TcpProto->TcpService);
 332   }
 333
 334   NetbufFreeList (&Tcb->SndQue);
 335   NetbufFreeList (&Tcb->RcvQue);
 336   Tcb->State = TCP_CLOSED;
 337   Tcb->RemoteIpZero = FALSE;
 338 }
 339
 340 /**
 341   Attach a Pcb to the socket.
 342
 343   @param[in]  Sk                 Pointer to the socket of this TCP instance.
 344
 345   @retval EFI_SUCCESS            The operation completed successfully.
 346   @retval EFI_OUT_OF_RESOURCES   Failed due to resource limits.
 347
 348 **/
 349 EFI_STATUS
 350 TcpAttachPcb (
 351   IN SOCKET  *Sk
 352   )
 353 {
 354   TCP_CB          *Tcb;
 355   TCP_PROTO_DATA  *ProtoData;
 356   IP_IO           *IpIo;
 357
 358   Tcb = AllocateZeroPool (sizeof (TCP_CB));
 359
 360   if (Tcb == NULL) {
 361
 362     DEBUG ((EFI_D_ERROR, "TcpConfigurePcb: failed to allocate a TCB\n"));
 363
 364     return EFI_OUT_OF_RESOURCES;
 365   }
 366
 367   ProtoData = (TCP_PROTO_DATA *) Sk->ProtoReserved;
 368   IpIo      = ProtoData->TcpService->IpIo;
 369
 370   //
 371   // Create an IpInfo for this Tcb.
 372   //
 373   Tcb->IpInfo = IpIoAddIp (IpIo);
 374   if (Tcb->IpInfo == NULL) {
 375
 376     FreePool (Tcb);
 377     return EFI_OUT_OF_RESOURCES;
 378   }
 379
 380   InitializeListHead (&Tcb->List);
 381   InitializeListHead (&Tcb->SndQue);
 382   InitializeListHead (&Tcb->RcvQue);
 383
 384   Tcb->State        = TCP_CLOSED;
 385   Tcb->Sk           = Sk;
 386   ProtoData->TcpPcb = Tcb;
 387
 388   return EFI_SUCCESS;
 389 }
 390
 391 /**
 392   Detach the Pcb of the socket.
 393
 394   @param[in, out]  Sk           Pointer to the socket of this TCP instance.
 395
 396 **/
 397 VOID
 398 TcpDetachPcb (
 399   IN OUT SOCKET    *Sk
 400   )
 401 {
 402   TCP_PROTO_DATA   *ProtoData;
 403   TCP_CB           *Tcb;
 404
 405   ProtoData = (TCP_PROTO_DATA *) Sk->ProtoReserved;
 406   Tcb       = ProtoData->TcpPcb;
 407
 408   ASSERT (Tcb != NULL);
 409
 410   TcpFlushPcb (Tcb);
 411
 412   IpIoRemoveIp (ProtoData->TcpService->IpIo, Tcb->IpInfo);
 413
 414   FreePool (Tcb);
 415
 416   ProtoData->TcpPcb = NULL;
 417 }
 418
 419 /**
 420   Configure the Pcb using CfgData.
 421
 422   @param[in]  Sk                 Pointer to the socket of this TCP instance.
 423   @param[in]  CfgData            Pointer to the TCP configuration data.
 424
 425   @retval EFI_SUCCESS            The operation completed successfully.
 426   @retval EFI_INVALID_PARAMETER  A same access point has been configured in
 427                                  another TCP instance.
 428   @retval EFI_OUT_OF_RESOURCES   Failed due to resource limits.
 429
 430 **/
 431 EFI_STATUS
 432 TcpConfigurePcb (
 433   IN SOCKET           *Sk,
 434   IN TCP_CONFIG_DATA  *CfgData
 435   )
 436 {
 437   IP_IO_IP_CONFIG_DATA IpCfgData;
 438   EFI_STATUS           Status;
 439   EFI_TCP4_OPTION      *Option;
 440   TCP_PROTO_DATA       *TcpProto;
 441   TCP_CB               *Tcb;
 442   TCP_ACCESS_POINT     *TcpAp;
 443
 444   ASSERT ((CfgData != NULL) && (Sk != NULL) && (Sk->SockHandle != NULL));
 445
 446   TcpProto = (TCP_PROTO_DATA *) Sk->ProtoReserved;
 447   Tcb      = TcpProto->TcpPcb;
 448
 449   ASSERT (Tcb != NULL);
 450
 451   if (Sk->IpVersion == IP_VERSION_4) {
 452     //
 453     // Add Ip for send pkt to the peer
 454     //
 455     CopyMem (&IpCfgData.Ip4CfgData, &mIp4IoDefaultIpConfigData, sizeof (EFI_IP4_CONFIG_DATA));
 456     IpCfgData.Ip4CfgData.DefaultProtocol    = EFI_IP_PROTO_TCP;
 457     IpCfgData.Ip4CfgData.TypeOfService      = CfgData->Tcp4CfgData.TypeOfService;
 458     IpCfgData.Ip4CfgData.TimeToLive         = CfgData->Tcp4CfgData.TimeToLive;
 459     IpCfgData.Ip4CfgData.UseDefaultAddress  = CfgData->Tcp4CfgData.AccessPoint.UseDefaultAddress;
 460     IpCfgData.Ip4CfgData.SubnetMask         = CfgData->Tcp4CfgData.AccessPoint.SubnetMask;
 461     IpCfgData.Ip4CfgData.ReceiveTimeout     = (UINT32) (-1);
 462     CopyMem (
 463       &IpCfgData.Ip4CfgData.StationAddress,
 464       &CfgData->Tcp4CfgData.AccessPoint.StationAddress,
 465       sizeof (EFI_IPv4_ADDRESS)
 466       );
 467
 468   } else {
 469     ASSERT (Sk->IpVersion == IP_VERSION_6);
 470
 471     CopyMem (&IpCfgData.Ip6CfgData, &mIp6IoDefaultIpConfigData, sizeof (EFI_IP6_CONFIG_DATA));
 472     IpCfgData.Ip6CfgData.DefaultProtocol    = EFI_IP_PROTO_TCP;
 473     IpCfgData.Ip6CfgData.TrafficClass       = CfgData->Tcp6CfgData.TrafficClass;
 474     IpCfgData.Ip6CfgData.HopLimit           = CfgData->Tcp6CfgData.HopLimit;
 475     IpCfgData.Ip6CfgData.ReceiveTimeout     = (UINT32) (-1);
 476     IP6_COPY_ADDRESS (
 477       &IpCfgData.Ip6CfgData.StationAddress,
 478       &CfgData->Tcp6CfgData.AccessPoint.StationAddress
 479       );
 480     IP6_COPY_ADDRESS (
 481       &IpCfgData.Ip6CfgData.DestinationAddress,
 482       &CfgData->Tcp6CfgData.AccessPoint.RemoteAddress
 483       );
 484   }
 485
 486   //
 487   // Configure the IP instance this Tcb consumes.
 488   //
 489   Status = IpIoConfigIp (Tcb->IpInfo, &IpCfgData);
 490   if (EFI_ERROR (Status)) {
 491     goto OnExit;
 492   }
 493
 494   if (Sk->IpVersion == IP_VERSION_4) {
 495     //
 496     // Get the default address information if the instance is configured to use default address.
 497     //
 498     CfgData->Tcp4CfgData.AccessPoint.StationAddress = IpCfgData.Ip4CfgData.StationAddress;
 499     CfgData->Tcp4CfgData.AccessPoint.SubnetMask     = IpCfgData.Ip4CfgData.SubnetMask;
 500
 501     TcpAp = (TCP_ACCESS_POINT *) &CfgData->Tcp4CfgData.AccessPoint;
 502   } else {
 503     IP6_COPY_ADDRESS (
 504       &CfgData->Tcp6CfgData.AccessPoint.StationAddress,
 505       &IpCfgData.Ip6CfgData.StationAddress
 506       );
 507
 508     TcpAp = (TCP_ACCESS_POINT *) &CfgData->Tcp6CfgData.AccessPoint;
 509   }
 510
 511   //
 512   // check if we can bind this endpoint in CfgData
 513   //
 514   Status = TcpBind (TcpAp, Sk->IpVersion);
 515
 516   if (EFI_ERROR (Status)) {
 517     DEBUG (
 518       (EFI_D_ERROR,
 519       "TcpConfigurePcb: Bind endpoint failed with %r\n",
 520       Status)
 521       );
 522
 523     goto OnExit;
 524   }
 525
 526   //
 527   // Initalize the operating information in this Tcb
 528   //
 529   ASSERT (Tcb->State == TCP_CLOSED &&
 530     IsListEmpty (&Tcb->SndQue) &&
 531     IsListEmpty (&Tcb->RcvQue));
 532
 533   TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_NO_KEEPALIVE);
 534   Tcb->State            = TCP_CLOSED;
 535
 536   Tcb->SndMss           = 536;
 537   Tcb->RcvMss           = TcpGetRcvMss (Sk);
 538
 539   Tcb->SRtt             = 0;
 540   Tcb->Rto              = 3 * TCP_TICK_HZ;
 541
 542   Tcb->CWnd             = Tcb->SndMss;
 543   Tcb->Ssthresh         = 0xffffffff;
 544
 545   Tcb->CongestState     = TCP_CONGEST_OPEN;
 546
 547   Tcb->KeepAliveIdle    = TCP_KEEPALIVE_IDLE_MIN;
 548   Tcb->KeepAlivePeriod  = TCP_KEEPALIVE_PERIOD;
 549   Tcb->MaxKeepAlive     = TCP_MAX_KEEPALIVE;
 550   Tcb->MaxRexmit        = TCP_MAX_LOSS;
 551   Tcb->FinWait2Timeout  = TCP_FIN_WAIT2_TIME;
 552   Tcb->TimeWaitTimeout  = TCP_TIME_WAIT_TIME;
 553   Tcb->ConnectTimeout   = TCP_CONNECT_TIME;
 554
 555   if (Sk->IpVersion == IP_VERSION_4) {
 556     //
 557     // initialize Tcb in the light of CfgData
 558     //
 559     Tcb->Ttl            = CfgData->Tcp4CfgData.TimeToLive;
 560     Tcb->Tos            = CfgData->Tcp4CfgData.TypeOfService;
 561
 562     Tcb->UseDefaultAddr = CfgData->Tcp4CfgData.AccessPoint.UseDefaultAddress;
 563
 564     CopyMem (&Tcb->LocalEnd.Ip, &CfgData->Tcp4CfgData.AccessPoint.StationAddress, sizeof (IP4_ADDR));
 565     Tcb->LocalEnd.Port  = HTONS (CfgData->Tcp4CfgData.AccessPoint.StationPort);
 566     Tcb->SubnetMask     = CfgData->Tcp4CfgData.AccessPoint.SubnetMask;
 567
 568     CopyMem (&Tcb->RemoteEnd.Ip, &CfgData->Tcp4CfgData.AccessPoint.RemoteAddress, sizeof (IP4_ADDR));
 569     Tcb->RemoteEnd.Port = HTONS (CfgData->Tcp4CfgData.AccessPoint.RemotePort);
 570
 571     Option              = CfgData->Tcp4CfgData.ControlOption;
 572   } else {
 573     Tcb->Ttl            = CfgData->Tcp6CfgData.HopLimit;
 574     Tcb->Tos            = CfgData->Tcp6CfgData.TrafficClass;
 575
 576     IP6_COPY_ADDRESS (&Tcb->LocalEnd.Ip, &CfgData->Tcp6CfgData.AccessPoint.StationAddress);
 577     Tcb->LocalEnd.Port  = HTONS (CfgData->Tcp6CfgData.AccessPoint.StationPort);
 578
 579     IP6_COPY_ADDRESS (&Tcb->RemoteEnd.Ip, &CfgData->Tcp6CfgData.AccessPoint.RemoteAddress);
 580     Tcb->RemoteEnd.Port = HTONS (CfgData->Tcp6CfgData.AccessPoint.RemotePort);
 581
 582     //
 583     // Type EFI_TCP4_OPTION and EFI_TCP6_OPTION are the same.
 584     //
 585     Option              = (EFI_TCP4_OPTION *) CfgData->Tcp6CfgData.ControlOption;
 586   }
 587
 588   if (Option != NULL) {
 589     SET_RCV_BUFFSIZE (
 590       Sk,
 591       (UINT32) (TCP_COMP_VAL (
 592                   TCP_RCV_BUF_SIZE_MIN,
 593                   TCP_RCV_BUF_SIZE,
 594                   TCP_RCV_BUF_SIZE,
 595                   Option->ReceiveBufferSize
 596                   )
 597                )
 598       );
 599     SET_SND_BUFFSIZE (
 600       Sk,
 601       (UINT32) (TCP_COMP_VAL (
 602                   TCP_SND_BUF_SIZE_MIN,
 603                   TCP_SND_BUF_SIZE,
 604                   TCP_SND_BUF_SIZE,
 605                   Option->SendBufferSize
 606                   )
 607                )
 608       );
 609
 610     SET_BACKLOG (
 611       Sk,
 612       (UINT32) (TCP_COMP_VAL (
 613                   TCP_BACKLOG_MIN,
 614                   TCP_BACKLOG,
 615                   TCP_BACKLOG,
 616                   Option->MaxSynBackLog
 617                   )
 618                )
 619       );
 620
 621     Tcb->MaxRexmit = (UINT16) TCP_COMP_VAL (
 622                                 TCP_MAX_LOSS_MIN,
 623                                 TCP_MAX_LOSS,
 624                                 TCP_MAX_LOSS,
 625                                 Option->DataRetries
 626                                 );
 627     Tcb->FinWait2Timeout = TCP_COMP_VAL (
 628                               TCP_FIN_WAIT2_TIME,
 629                               TCP_FIN_WAIT2_TIME_MAX,
 630                               TCP_FIN_WAIT2_TIME,
 631                               (UINT32) (Option->FinTimeout * TCP_TICK_HZ)
 632                               );
 633
 634     if (Option->TimeWaitTimeout != 0) {
 635       Tcb->TimeWaitTimeout = TCP_COMP_VAL (
 636                                TCP_TIME_WAIT_TIME,
 637                                TCP_TIME_WAIT_TIME_MAX,
 638                                TCP_TIME_WAIT_TIME,
 639                                (UINT32) (Option->TimeWaitTimeout * TCP_TICK_HZ)
 640                                );
 641     } else {
 642       Tcb->TimeWaitTimeout = 0;
 643     }
 644
 645     if (Option->KeepAliveProbes != 0) {
 646       TCP_CLEAR_FLG (Tcb->CtrlFlag, TCP_CTRL_NO_KEEPALIVE);
 647
 648       Tcb->MaxKeepAlive = (UINT8) TCP_COMP_VAL (
 649                                     TCP_MAX_KEEPALIVE_MIN,
 650                                     TCP_MAX_KEEPALIVE,
 651                                     TCP_MAX_KEEPALIVE,
 652                                     Option->KeepAliveProbes
 653                                     );
 654       Tcb->KeepAliveIdle = TCP_COMP_VAL (
 655                              TCP_KEEPALIVE_IDLE_MIN,
 656                              TCP_KEEPALIVE_IDLE_MAX,
 657                              TCP_KEEPALIVE_IDLE_MIN,
 658                              (UINT32) (Option->KeepAliveTime * TCP_TICK_HZ)
 659                              );
 660       Tcb->KeepAlivePeriod = TCP_COMP_VAL (
 661                                TCP_KEEPALIVE_PERIOD_MIN,
 662                                TCP_KEEPALIVE_PERIOD,
 663                                TCP_KEEPALIVE_PERIOD,
 664                                (UINT32) (Option->KeepAliveInterval * TCP_TICK_HZ)
 665                                );
 666     }
 667
 668     Tcb->ConnectTimeout = TCP_COMP_VAL (
 669                             TCP_CONNECT_TIME_MIN,
 670                             TCP_CONNECT_TIME,
 671                             TCP_CONNECT_TIME,
 672                             (UINT32) (Option->ConnectionTimeout * TCP_TICK_HZ)
 673                             );
 674
 675     if (!Option->EnableNagle) {
 676       TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_NO_NAGLE);
 677     }
 678
 679     if (!Option->EnableTimeStamp) {
 680       TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_NO_TS);
 681     }
 682
 683     if (!Option->EnableWindowScaling) {
 684       TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_NO_WS);
 685     }
 686   }
 687
 688   //
 689   // The socket is bound, the <SrcIp, SrcPort, DstIp, DstPort> is
 690   // determined, construct the IP device path and install it.
 691   //
 692   Status = TcpInstallDevicePath (Sk);
 693   if (EFI_ERROR (Status)) {
 694     goto OnExit;
 695   }
 696
 697   //
 698   // update state of Tcb and socket
 699   //
 700   if (((Sk->IpVersion == IP_VERSION_4) && !CfgData->Tcp4CfgData.AccessPoint.ActiveFlag) ||
 701       ((Sk->IpVersion == IP_VERSION_6) && !CfgData->Tcp6CfgData.AccessPoint.ActiveFlag)
 702       ) {
 703
 704     TcpSetState (Tcb, TCP_LISTEN);
 705     SockSetState (Sk, SO_LISTENING);
 706
 707     Sk->ConfigureState = SO_CONFIGURED_PASSIVE;
 708   } else {
 709
 710     Sk->ConfigureState = SO_CONFIGURED_ACTIVE;
 711   }
 712
 713   if (Sk->IpVersion == IP_VERSION_6) {
 714     Tcb->Tick          = TCP6_REFRESH_NEIGHBOR_TICK;
 715
 716     if (NetIp6IsUnspecifiedAddr (&Tcb->RemoteEnd.Ip.v6)) {
 717       Tcb->RemoteIpZero = TRUE;
 718     }
 719   }
 720
 721   TcpInsertTcb (Tcb);
 722
 723 OnExit:
 724
 725   return Status;
 726 }
 727
 728 /**
 729   The procotol handler provided to the socket layer, which is used to
 730   dispatch the socket level requests by calling the corresponding
 731   TCP layer functions.
 732
 733   @param[in]  Sock               Pointer to the socket of this TCP instance.
 734   @param[in]  Request            The code of this operation request.
 735   @param[in]  Data               Pointer to the operation specific data passed in
 736                                  together with the operation request. This is an
 737                                  optional parameter that may be NULL.
 738
 739   @retval EFI_SUCCESS            The socket request completed successfully.
 740   @retval other                  The error status returned by the corresponding TCP
 741                                  layer function.
 742
 743 **/
 744 EFI_STATUS
 745 TcpDispatcher (
 746   IN SOCKET                  *Sock,
 747   IN UINT8                   Request,
 748   IN VOID                    *Data    OPTIONAL
 749   )
 750 {
 751   TCP_CB          *Tcb;
 752   TCP_PROTO_DATA  *ProtoData;
 753
 754   ProtoData = (TCP_PROTO_DATA *) Sock->ProtoReserved;
 755   Tcb       = ProtoData->TcpPcb;
 756
 757   switch (Request) {
 758   case SOCK_POLL:
 759     if (Tcb->Sk->IpVersion == IP_VERSION_4) {
 760       ProtoData->TcpService->IpIo->Ip.Ip4->Poll (ProtoData->TcpService->IpIo->Ip.Ip4);
 761     } else {
 762       ProtoData->TcpService->IpIo->Ip.Ip6->Poll (ProtoData->TcpService->IpIo->Ip.Ip6);
 763     }
 764
 765     break;
 766
 767   case SOCK_CONSUMED:
 768     //
 769     // After user received data from socket buffer, socket will
 770     // notify TCP using this message to give it a chance to send out
 771     // window update information
 772     //
 773     ASSERT (Tcb != NULL);
 774     TcpOnAppConsume (Tcb);
 775     break;
 776
 777   case SOCK_SND:
 778
 779     ASSERT (Tcb != NULL);
 780     TcpOnAppSend (Tcb);
 781     break;
 782
 783   case SOCK_CLOSE:
 784
 785     TcpOnAppClose (Tcb);
 786
 787     break;
 788
 789   case SOCK_ABORT:
 790
 791     TcpOnAppAbort (Tcb);
 792
 793     break;
 794
 795   case SOCK_SNDPUSH:
 796     Tcb->SndPsh = TcpGetMaxSndNxt (Tcb) + GET_SND_DATASIZE (Tcb->Sk);
 797     TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_SND_PSH);
 798
 799     break;
 800
 801   case SOCK_SNDURG:
 802     Tcb->SndUp = TcpGetMaxSndNxt (Tcb) + GET_SND_DATASIZE (Tcb->Sk) - 1;
 803     TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_SND_URG);
 804
 805     break;
 806
 807   case SOCK_CONNECT:
 808
 809     TcpOnAppConnect (Tcb);
 810
 811     break;
 812
 813   case SOCK_ATTACH:
 814
 815     return TcpAttachPcb (Sock);
 816
 817     break;
 818
 819   case SOCK_FLUSH:
 820
 821     TcpFlushPcb (Tcb);
 822
 823     break;
 824
 825   case SOCK_DETACH:
 826
 827     TcpDetachPcb (Sock);
 828
 829     break;
 830
 831   case SOCK_CONFIGURE:
 832
 833     return TcpConfigurePcb (
 834             Sock,
 835             (TCP_CONFIG_DATA *) Data
 836             );
 837
 838     break;
 839
 840   case SOCK_MODE:
 841
 842     ASSERT ((Data != NULL) && (Tcb != NULL));
 843
 844     if (Tcb->Sk->IpVersion == IP_VERSION_4) {
 845
 846       return Tcp4GetMode (Tcb, (TCP4_MODE_DATA *) Data);
 847     } else {
 848
 849       return Tcp6GetMode (Tcb, (TCP6_MODE_DATA *) Data);
 850     }
 851
 852     break;
 853
 854   case SOCK_ROUTE:
 855
 856     ASSERT ((Data != NULL) && (Tcb != NULL) && (Tcb->Sk->IpVersion == IP_VERSION_4));
 857
 858     return Tcp4Route (Tcb, (TCP4_ROUTE_INFO *) Data);
 859
 860   default:
 861
 862     return EFI_UNSUPPORTED;
 863   }
 864
 865   return EFI_SUCCESS;
 866 }