reactos/drivers/lib/ip/transport/tcp/tcp.c

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS TCP/IP protocol driver
   4  * FILE:        transport/tcp/tcp.c
   5  * PURPOSE:     Transmission Control Protocol
   6  * PROGRAMMERS: Casper S. Hornstrup (chorns@users.sourceforge.net)
   7  *              Art Yerkes (arty@users.sf.net)
   8  * REVISIONS:
   9  *   CSH 01/08-2000  Created
  10  *   arty 12/21/2004 Added accept
  11  */
  12
  13 #include "precomp.h"
  14
  15 LONG TCP_IPIdentification = 0;
  16 static BOOLEAN TCPInitialized = FALSE;
  17 static NPAGED_LOOKASIDE_LIST TCPSegmentList;
  18 LIST_ENTRY SignalledConnections;
  19 LIST_ENTRY SleepingThreadsList;
  20 FAST_MUTEX SleepingThreadsLock;
  21 RECURSIVE_MUTEX TCPLock;
  22 PORT_SET TCPPorts;
  23
  24 static VOID HandleSignalledConnection( PCONNECTION_ENDPOINT Connection,
  25                                        ULONG NewState ) {
  26     NTSTATUS Status = STATUS_SUCCESS;
  27     PTCP_COMPLETION_ROUTINE Complete;
  28     PTDI_BUCKET Bucket;
  29     PLIST_ENTRY Entry;
  30     PIRP Irp;
  31     PMDL Mdl;
  32
  33     TI_DbgPrint(MID_TRACE,("Handling signalled state on %x (%x)\n",
  34                            Connection, Connection->SocketContext));
  35
  36     /* Things that can happen when we try the initial connection */
  37     if( NewState & SEL_CONNECT ) {
  38         while( !IsListEmpty( &Connection->ConnectRequest ) ) {
  39             Connection->State |= NewState;
  40             Entry = RemoveHeadList( &Connection->ConnectRequest );
  41             TI_DbgPrint(DEBUG_TCP, ("Connect Event\n"));
  42
  43             Bucket = CONTAINING_RECORD( Entry, TDI_BUCKET, Entry );
  44             Complete = Bucket->Request.RequestNotifyObject;
  45             TI_DbgPrint(DEBUG_TCP,
  46                         ("Completing Request %x\n", Bucket->Request));
  47
  48             if( (NewState & (SEL_CONNECT | SEL_FIN)) ==
  49                 (SEL_CONNECT | SEL_FIN) )
  50                 Status = STATUS_CONNECTION_REFUSED;
  51             else
  52                 Status = STATUS_SUCCESS;
  53
  54             Complete( Bucket->Request.RequestContext, Status, 0 );
  55
  56             /* Frees the bucket allocated in TCPConnect */
  57             PoolFreeBuffer( Bucket );
  58         }
  59     }
  60
  61     if( NewState & SEL_ACCEPT ) {
  62         /* Handle readable on a listening socket --
  63          * TODO: Implement filtering
  64          */
  65
  66         TI_DbgPrint(DEBUG_TCP,("Accepting new connection on %x (Queue: %s)\n",
  67                                Connection,
  68                                IsListEmpty(&Connection->ListenRequest) ?
  69                                "empty" : "nonempty"));
  70
  71         while( !IsListEmpty( &Connection->ListenRequest ) ) {
  72             PIO_STACK_LOCATION IrpSp;
  73
  74             Entry = RemoveHeadList( &Connection->ListenRequest );
  75             Bucket = CONTAINING_RECORD( Entry, TDI_BUCKET, Entry );
  76             Complete = Bucket->Request.RequestNotifyObject;
  77
  78             Irp = Bucket->Request.RequestContext;
  79             IrpSp = IoGetCurrentIrpStackLocation( Irp );
  80
  81             TI_DbgPrint(DEBUG_TCP,("Getting the socket\n"));
  82             Status = TCPServiceListeningSocket
  83                 ( Connection->AddressFile->Listener,
  84                   Bucket->AssociatedEndpoint,
  85                   (PTDI_REQUEST_KERNEL)&IrpSp->Parameters );
  86
  87             TI_DbgPrint(DEBUG_TCP,("Socket: Status: %x\n"));
  88
  89             if( Status == STATUS_PENDING ) {
  90                 InsertHeadList( &Connection->ListenRequest, &Bucket->Entry );
  91                 break;
  92             } else
  93                 Complete( Bucket->Request.RequestContext, Status, 0 );
  94         }
  95     }
  96
  97     /* Things that happen after we're connected */
  98     if( NewState & SEL_READ ) {
  99         TI_DbgPrint(DEBUG_TCP,("Readable: irp list %s\n",
 100                                IsListEmpty(&Connection->ReceiveRequest) ?
 101                                "empty" : "nonempty"));
 102
 103         while( !IsListEmpty( &Connection->ReceiveRequest ) ) {
 104             OSK_UINT RecvLen = 0, Received = 0;
 105             OSK_PCHAR RecvBuffer = 0;
 106
 107             Entry = RemoveHeadList( &Connection->ReceiveRequest );
 108             Bucket = CONTAINING_RECORD( Entry, TDI_BUCKET, Entry );
 109             Complete = Bucket->Request.RequestNotifyObject;
 110
 111             Irp = Bucket->Request.RequestContext;
 112             Mdl = Irp->MdlAddress;
 113
 114             TI_DbgPrint(DEBUG_TCP,
 115                         ("Getting the user buffer from %x\n", Mdl));
 116
 117             NdisQueryBuffer( Mdl, &RecvBuffer, &RecvLen );
 118
 119             TI_DbgPrint(DEBUG_TCP,
 120                         ("Reading %d bytes to %x\n", RecvLen, RecvBuffer));
 121
 122             TI_DbgPrint(DEBUG_TCP, ("Connection: %x\n", Connection));
 123             TI_DbgPrint
 124                 (DEBUG_TCP,
 125                  ("Connection->SocketContext: %x\n",
 126                   Connection->SocketContext));
 127             TI_DbgPrint(DEBUG_TCP, ("RecvBuffer: %x\n", RecvBuffer));
 128
 129             Status = TCPTranslateError
 130                 ( OskitTCPRecv( Connection->SocketContext,
 131                                 RecvBuffer,
 132                                 RecvLen,
 133                                 &Received,
 134                                 0 ) );
 135
 136             TI_DbgPrint(DEBUG_TCP,("TCP Bytes: %d\n", Received));
 137
 138             if( Status == STATUS_SUCCESS ) {
 139                 TI_DbgPrint(DEBUG_TCP,("Received %d bytes with status %x\n",
 140                                        Received, Status));
 141
 142                 Complete( Bucket->Request.RequestContext,
 143                           STATUS_SUCCESS, Received );
 144             } else if( Status == STATUS_PENDING ) {
 145                 InsertHeadList
 146                     ( &Connection->ReceiveRequest, &Bucket->Entry );
 147                 break;
 148             } else {
 149                 TI_DbgPrint(DEBUG_TCP,
 150                             ("Completing Receive request: %x %x\n",
 151                              Bucket->Request, Status));
 152                 Complete( Bucket->Request.RequestContext, Status, 0 );
 153             }
 154         }
 155     }
 156
 157     if( NewState & SEL_FIN ) {
 158         PLIST_ENTRY ListsToErase[4];
 159         NTSTATUS    IrpStatus[4];
 160         UINT i;
 161
 162         TI_DbgPrint(DEBUG_TCP, ("EOF From socket\n"));
 163
 164         ListsToErase[0] = &Connection->ReceiveRequest;
 165         IrpStatus   [0] = STATUS_SUCCESS;
 166         ListsToErase[1] = &Connection->ListenRequest;
 167         IrpStatus   [1] = STATUS_UNSUCCESSFUL;
 168         ListsToErase[2] = &Connection->ConnectRequest;
 169         IrpStatus   [2] = STATUS_UNSUCCESSFUL;
 170         ListsToErase[3] = 0;
 171
 172         for( i = 0; ListsToErase[i]; i++ ) {
 173             while( !IsListEmpty( ListsToErase[i] ) ) {
 174                 Entry = RemoveHeadList( ListsToErase[i] );
 175                 Bucket = CONTAINING_RECORD( Entry, TDI_BUCKET, Entry );
 176                 Complete = Bucket->Request.RequestNotifyObject;
 177                 Complete( Bucket->Request.RequestContext, STATUS_SUCCESS, 0 );
 178             }
 179         }
 180     }
 181
 182     Connection->Signalled = FALSE;
 183 }
 184
 185 VOID DrainSignals() {
 186     PCONNECTION_ENDPOINT Connection;
 187     PLIST_ENTRY ListEntry;
 188
 189     while( !IsListEmpty( &SignalledConnections ) ) {
 190         ListEntry = RemoveHeadList( &SignalledConnections );
 191         Connection = CONTAINING_RECORD( ListEntry, CONNECTION_ENDPOINT,
 192                                         SignalList );
 193         HandleSignalledConnection( Connection, Connection->SignalState );
 194     }
 195 }
 196
 197 PCONNECTION_ENDPOINT TCPAllocateConnectionEndpoint( PVOID ClientContext ) {
 198     PCONNECTION_ENDPOINT Connection =
 199         ExAllocatePool(NonPagedPool, sizeof(CONNECTION_ENDPOINT));
 200     if (!Connection)
 201         return Connection;
 202
 203     TI_DbgPrint(DEBUG_CPOINT, ("Connection point file object allocated at (0x%X).\n", Connection));
 204
 205     RtlZeroMemory(Connection, sizeof(CONNECTION_ENDPOINT));
 206
 207     /* Initialize spin lock that protects the connection endpoint file object */
 208     TcpipInitializeSpinLock(&Connection->Lock);
 209     InitializeListHead(&Connection->ConnectRequest);
 210     InitializeListHead(&Connection->ListenRequest);
 211     InitializeListHead(&Connection->ReceiveRequest);
 212
 213     /* Save client context pointer */
 214     Connection->ClientContext = ClientContext;
 215
 216     return Connection;
 217 }
 218
 219 VOID TCPFreeConnectionEndpoint( PCONNECTION_ENDPOINT Connection ) {
 220     TI_DbgPrint(MAX_TRACE,("FIXME: Cancel all pending requests\n"));
 221     /* XXX Cancel all pending requests */
 222     ExFreePool( Connection );
 223 }
 224
 225 NTSTATUS TCPSocket( PCONNECTION_ENDPOINT Connection,
 226                     UINT Family, UINT Type, UINT Proto ) {
 227     NTSTATUS Status;
 228
 229     TI_DbgPrint(DEBUG_TCP,("Called: Connection %x, Family %d, Type %d, "
 230                            "Proto %d\n",
 231                            Connection, Family, Type, Proto));
 232
 233     TcpipRecursiveMutexEnter( &TCPLock, TRUE );
 234     Status = TCPTranslateError( OskitTCPSocket( Connection,
 235                                                 &Connection->SocketContext,
 236                                                 Family,
 237                                                 Type,
 238                                                 Proto ) );
 239
 240     ASSERT_KM_POINTER(Connection->SocketContext);
 241
 242     TI_DbgPrint(DEBUG_TCP,("Connection->SocketContext %x\n",
 243                            Connection->SocketContext));
 244
 245     TcpipRecursiveMutexLeave( &TCPLock );
 246
 247     return Status;
 248 }
 249
 250 VOID TCPReceive(PIP_INTERFACE Interface, PIP_PACKET IPPacket)
 251 /*
 252  * FUNCTION: Receives and queues TCP data
 253  * ARGUMENTS:
 254  *     IPPacket = Pointer to an IP packet that was received
 255  * NOTES:
 256  *     This is the low level interface for receiving TCP data
 257  */
 258 {
 259     TI_DbgPrint(DEBUG_TCP,("Sending packet %d (%d) to oskit\n",
 260                            IPPacket->TotalSize,
 261                            IPPacket->HeaderSize));
 262
 263     TcpipRecursiveMutexEnter( &TCPLock, TRUE );
 264
 265     OskitTCPReceiveDatagram( IPPacket->Header,
 266                              IPPacket->TotalSize,
 267                              IPPacket->HeaderSize );
 268
 269     DrainSignals();
 270
 271     TcpipRecursiveMutexLeave( &TCPLock );
 272 }
 273
 274 /* event.c */
 275 int TCPSocketState( void *ClientData,
 276                     void *WhichSocket,
 277                     void *WhichConnection,
 278                     OSK_UINT NewState );
 279
 280 int TCPPacketSend( void *ClientData,
 281                    OSK_PCHAR Data,
 282                    OSK_UINT Len );
 283
 284 POSK_IFADDR TCPFindInterface( void *ClientData,
 285                               OSK_UINT AddrType,
 286                               OSK_UINT FindType,
 287                               OSK_SOCKADDR *ReqAddr );
 288
 289 void *TCPMalloc( void *ClientData,
 290                  OSK_UINT bytes, OSK_PCHAR file, OSK_UINT line );
 291 void TCPFree( void *ClientData,
 292               void *data, OSK_PCHAR file, OSK_UINT line );
 293
 294 int TCPSleep( void *ClientData, void *token, int priority, char *msg,
 295               int tmio );
 296
 297 void TCPWakeup( void *ClientData, void *token );
 298
 299 OSKITTCP_EVENT_HANDLERS EventHandlers = {
 300     NULL,             /* Client Data */
 301     TCPSocketState,   /* SocketState */
 302     TCPPacketSend,    /* PacketSend */
 303     TCPFindInterface, /* FindInterface */
 304     TCPMalloc,        /* Malloc */
 305     TCPFree,          /* Free */
 306     TCPSleep,         /* Sleep */
 307     TCPWakeup         /* Wakeup */
 308 };
 309
 310 NTSTATUS TCPStartup(VOID)
 311 /*
 312  * FUNCTION: Initializes the TCP subsystem
 313  * RETURNS:
 314  *     Status of operation
 315  */
 316 {
 317     TcpipRecursiveMutexInit( &TCPLock );
 318     ExInitializeFastMutex( &SleepingThreadsLock );
 319     InitializeListHead( &SleepingThreadsList );
 320     InitializeListHead( &SignalledConnections );
 321
 322     PortsStartup( &TCPPorts, 1, 0xfffe );
 323
 324     RegisterOskitTCPEventHandlers( &EventHandlers );
 325     InitOskitTCP();
 326
 327     /* Register this protocol with IP layer */
 328     IPRegisterProtocol(IPPROTO_TCP, TCPReceive);
 329
 330     ExInitializeNPagedLookasideList(
 331         &TCPSegmentList,                /* Lookaside list */
 332         NULL,                           /* Allocate routine */
 333         NULL,                           /* Free routine */
 334         0,                              /* Flags */
 335         sizeof(TCP_SEGMENT),            /* Size of each entry */
 336         TAG('T','C','P','S'),           /* Tag */
 337         0);                             /* Depth */
 338
 339     TCPInitialized = TRUE;
 340
 341     return STATUS_SUCCESS;
 342 }
 343
 344
 345 NTSTATUS TCPShutdown(VOID)
 346 /*
 347  * FUNCTION: Shuts down the TCP subsystem
 348  * RETURNS:
 349  *     Status of operation
 350  */
 351 {
 352     if (!TCPInitialized)
 353         return STATUS_SUCCESS;
 354
 355     /* Deregister this protocol with IP layer */
 356     IPRegisterProtocol(IPPROTO_TCP, NULL);
 357
 358     ExDeleteNPagedLookasideList(&TCPSegmentList);
 359
 360     TCPInitialized = FALSE;
 361
 362     DeinitOskitTCP();
 363
 364     PortsShutdown( &TCPPorts );
 365
 366     return STATUS_SUCCESS;
 367 }
 368
 369 NTSTATUS TCPTranslateError( int OskitError ) {
 370     NTSTATUS Status = STATUS_UNSUCCESSFUL;
 371
 372     switch( OskitError ) {
 373     case 0: Status = STATUS_SUCCESS; break;
 374     case OSK_EADDRNOTAVAIL:
 375     case OSK_EAFNOSUPPORT: Status = STATUS_INVALID_CONNECTION; break;
 376     case OSK_ECONNREFUSED:
 377     case OSK_ECONNRESET: Status = STATUS_REMOTE_NOT_LISTENING; break;
 378     case OSK_EINPROGRESS:
 379     case OSK_EAGAIN: Status = STATUS_PENDING; break;
 380     default: Status = STATUS_INVALID_CONNECTION; break;
 381     }
 382
 383     TI_DbgPrint(DEBUG_TCP,("Error %d -> %x\n", OskitError, Status));
 384     return Status;
 385 }
 386
 387 NTSTATUS TCPConnect
 388 ( PCONNECTION_ENDPOINT Connection,
 389   PTDI_CONNECTION_INFORMATION ConnInfo,
 390   PTDI_CONNECTION_INFORMATION ReturnInfo,
 391   PTCP_COMPLETION_ROUTINE Complete,
 392   PVOID Context ) {
 393     NTSTATUS Status;
 394     SOCKADDR_IN AddressToConnect = { 0 }, AddressToBind = { 0 };
 395     IP_ADDRESS RemoteAddress;
 396     USHORT RemotePort;
 397     PTDI_BUCKET Bucket;
 398
 399     DbgPrint("TCPConnect: Called\n");
 400
 401     Bucket = ExAllocatePool( NonPagedPool, sizeof(*Bucket) );
 402     if( !Bucket ) return STATUS_NO_MEMORY;
 403
 404     TcpipRecursiveMutexEnter( &TCPLock, TRUE );
 405
 406     /* Freed in TCPSocketState */
 407     Bucket->Request.RequestNotifyObject = (PVOID)Complete;
 408     Bucket->Request.RequestContext = Context;
 409
 410     InsertHeadList( &Connection->ConnectRequest, &Bucket->Entry );
 411
 412     Status = AddrBuildAddress
 413         ((PTRANSPORT_ADDRESS)ConnInfo->RemoteAddress,
 414          &RemoteAddress,
 415          &RemotePort);
 416
 417     DbgPrint("Connecting to address %x:%x\n",
 418              RemoteAddress.Address.IPv4Address,
 419              RemotePort);
 420
 421     if (!NT_SUCCESS(Status)) {
 422         TI_DbgPrint(DEBUG_TCP, ("Could not AddrBuildAddress in TCPConnect\n"));
 423         return Status;
 424     }
 425
 426     AddressToConnect.sin_family = AF_INET;
 427     AddressToBind = AddressToConnect;
 428
 429     OskitTCPBind( Connection->SocketContext,
 430                   Connection,
 431                   &AddressToBind,
 432                   sizeof(AddressToBind) );
 433
 434     memcpy( &AddressToConnect.sin_addr,
 435             &RemoteAddress.Address.IPv4Address,
 436             sizeof(AddressToConnect.sin_addr) );
 437     AddressToConnect.sin_port = RemotePort;
 438
 439     Status = TCPTranslateError
 440         ( OskitTCPConnect( Connection->SocketContext,
 441                            Connection,
 442                            &AddressToConnect,
 443                            sizeof(AddressToConnect) ) );
 444
 445     TcpipRecursiveMutexLeave( &TCPLock );
 446
 447     if( Status == OSK_EINPROGRESS )
 448         return STATUS_PENDING;
 449     else
 450         return Status;
 451 }
 452
 453 NTSTATUS TCPDisconnect
 454 ( PCONNECTION_ENDPOINT Connection,
 455   UINT Flags,
 456   PTDI_CONNECTION_INFORMATION ConnInfo,
 457   PTDI_CONNECTION_INFORMATION ReturnInfo,
 458   PTCP_COMPLETION_ROUTINE Complete,
 459   PVOID Context ) {
 460     NTSTATUS Status;
 461
 462     TI_DbgPrint(DEBUG_TCP,("started\n"));
 463
 464     TcpipRecursiveMutexEnter( &TCPLock, TRUE );
 465
 466     switch( Flags & (TDI_DISCONNECT_ABORT | TDI_DISCONNECT_RELEASE) ) {
 467     case 0:
 468     case TDI_DISCONNECT_ABORT:
 469         Flags = 0;
 470         break;
 471
 472     case TDI_DISCONNECT_ABORT | TDI_DISCONNECT_RELEASE:
 473         Flags = 2;
 474         break;
 475
 476     case TDI_DISCONNECT_RELEASE:
 477         Flags = 1;
 478         break;
 479     }
 480
 481     Status = TCPTranslateError
 482         ( OskitTCPShutdown( Connection->SocketContext, Flags ) );
 483
 484     TcpipRecursiveMutexLeave( &TCPLock );
 485
 486     TI_DbgPrint(DEBUG_TCP,("finished %x\n", Status));
 487
 488     return Status;
 489 }
 490
 491 NTSTATUS TCPClose
 492 ( PCONNECTION_ENDPOINT Connection ) {
 493     NTSTATUS Status;
 494
 495     TI_DbgPrint(DEBUG_TCP,("TCPClose started\n"));
 496
 497     TcpipRecursiveMutexEnter( &TCPLock, TRUE );
 498
 499     Status = TCPTranslateError( OskitTCPClose( Connection->SocketContext ) );
 500
 501     /* Make our code remove all pending IRPs */
 502     Connection->State |= SEL_FIN;
 503     DrainSignals();
 504
 505     TcpipRecursiveMutexLeave( &TCPLock );
 506
 507     TI_DbgPrint(DEBUG_TCP,("TCPClose finished %x\n", Status));
 508
 509     return Status;
 510 }
 511
 512 NTSTATUS TCPReceiveData
 513 ( PCONNECTION_ENDPOINT Connection,
 514   PNDIS_BUFFER Buffer,
 515   ULONG ReceiveLength,
 516   PULONG BytesReceived,
 517   ULONG ReceiveFlags,
 518   PTCP_COMPLETION_ROUTINE Complete,
 519   PVOID Context ) {
 520     OSK_PCHAR DataBuffer;
 521     UINT DataLen, Received = 0;
 522     NTSTATUS Status;
 523     PTDI_BUCKET Bucket;
 524
 525     TI_DbgPrint(DEBUG_TCP,("Called for %d bytes (on socket %x)\n",
 526                            ReceiveLength, Connection->SocketContext));
 527
 528     ASSERT_KM_POINTER(Connection->SocketContext);
 529
 530     TcpipRecursiveMutexEnter( &TCPLock, TRUE );
 531
 532     NdisQueryBuffer( Buffer, &DataBuffer, &DataLen );
 533
 534     TI_DbgPrint(DEBUG_TCP,("TCP>|< Got an MDL %x (%x:%d)\n", Buffer, DataBuffer, DataLen));
 535
 536     Status = TCPTranslateError
 537         ( OskitTCPRecv
 538           ( Connection->SocketContext,
 539             DataBuffer,
 540             DataLen,
 541             &Received,
 542             ReceiveFlags ) );
 543
 544     TI_DbgPrint(DEBUG_TCP,("OskitTCPReceive: %x, %d\n", Status, Received));
 545
 546     /* Keep this request around ... there was no data yet */
 547     if( Status == STATUS_PENDING ) {
 548         /* Freed in TCPSocketState */
 549         Bucket = ExAllocatePool( NonPagedPool, sizeof(*Bucket) );
 550         if( !Bucket ) {
 551             TI_DbgPrint(DEBUG_TCP,("Failed to allocate bucket\n"));
 552             TcpipRecursiveMutexLeave( &TCPLock );
 553             return STATUS_NO_MEMORY;
 554         }
 555
 556         Bucket->Request.RequestNotifyObject = Complete;
 557         Bucket->Request.RequestContext = Context;
 558         *BytesReceived = 0;
 559
 560         InsertHeadList( &Connection->ReceiveRequest, &Bucket->Entry );
 561         Status = STATUS_PENDING;
 562         TI_DbgPrint(DEBUG_TCP,("Queued read irp\n"));
 563     } else {
 564         TI_DbgPrint(DEBUG_TCP,("Got status %x, bytes %d\n", Status, Received));
 565         *BytesReceived = Received;
 566     }
 567
 568     TcpipRecursiveMutexLeave( &TCPLock );
 569
 570     TI_DbgPrint(DEBUG_TCP,("Status %x\n", Status));
 571
 572     return Status;
 573 }
 574
 575 NTSTATUS TCPSendData
 576 ( PCONNECTION_ENDPOINT Connection,
 577   PCHAR BufferData,
 578   ULONG PacketSize,
 579   PULONG DataUsed,
 580   ULONG Flags) {
 581     NTSTATUS Status;
 582
 583     ASSERT_KM_POINTER(Connection->SocketContext);
 584
 585     TcpipRecursiveMutexEnter( &TCPLock, TRUE );
 586
 587     TI_DbgPrint(DEBUG_TCP,("Connection = %x\n", Connection));
 588     TI_DbgPrint(DEBUG_TCP,("Connection->SocketContext = %x\n",
 589                            Connection->SocketContext));
 590
 591     Status = OskitTCPSend( Connection->SocketContext,
 592                            (OSK_PCHAR)BufferData, PacketSize,
 593                            (PUINT)DataUsed, 0 );
 594
 595     TcpipRecursiveMutexLeave( &TCPLock );
 596
 597     return Status;
 598 }
 599
 600 VOID TCPTimeout(VOID) {
 601     static int Times = 0;
 602     TcpipRecursiveMutexEnter( &TCPLock, TRUE );
 603     if( (Times++ % 5) == 0 ) {
 604         TimerOskitTCP();
 605     }
 606     DrainSignals();
 607     TcpipRecursiveMutexLeave( &TCPLock );
 608 }
 609
 610 UINT TCPAllocatePort( UINT HintPort ) {
 611     if( HintPort ) {
 612         if( AllocatePort( &TCPPorts, HintPort ) ) return HintPort;
 613         else {
 614             TI_DbgPrint
 615                 (MID_TRACE,("We got a hint port but couldn't allocate it\n"));
 616             return (UINT)-1;
 617         }
 618     } else return AllocatePortFromRange( &TCPPorts, 1024, 5000 );
 619 }
 620
 621 VOID TCPFreePort( UINT Port ) {
 622     DeallocatePort( &TCPPorts, Port );
 623 }
 624
 625 NTSTATUS TCPGetPeerAddress
 626 ( PCONNECTION_ENDPOINT Connection,
 627   PTRANSPORT_ADDRESS Address ) {
 628     OSK_UINT LocalAddress, RemoteAddress;
 629     OSK_UI16 LocalPort, RemotePort;
 630     PTA_IP_ADDRESS AddressIP = (PTA_IP_ADDRESS)Address;
 631
 632     TcpipRecursiveMutexEnter( &TCPLock, TRUE );
 633
 634     OskitTCPGetAddress
 635         ( Connection->SocketContext,
 636           &LocalAddress, &LocalPort,
 637           &RemoteAddress, &RemotePort );
 638
 639     AddressIP->TAAddressCount = 1;
 640     AddressIP->Address[0].AddressLength = TDI_ADDRESS_LENGTH_IP;
 641     AddressIP->Address[0].AddressType = TDI_ADDRESS_TYPE_IP;
 642     AddressIP->Address[0].Address[0].sin_port = RemotePort;
 643     AddressIP->Address[0].Address[0].in_addr = RemoteAddress;
 644
 645     TcpipRecursiveMutexLeave( &TCPLock );
 646
 647     return STATUS_SUCCESS;
 648 }
 649
 650 /* EOF */