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

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS TCP/IP protocol driver
   4  * FILE:        transport/tcp/accept.c
   5  * PURPOSE:     Transmission Control Protocol Listen/Accept code
   6  * PROGRAMMERS: Art Yerkes (arty@users.sf.net)
   7  * REVISIONS:
   8  *   arty 12/21/2004 Created
   9  */
  10
  11 #include "precomp.h"
  12
  13 NTSTATUS TCPServiceListeningSocket( PCONNECTION_ENDPOINT Listener,
  14                                     PCONNECTION_ENDPOINT Connection,
  15                                     PTDI_REQUEST_KERNEL Request ) {
  16     NTSTATUS Status;
  17     SOCKADDR_IN OutAddr;
  18     OSK_UINT OutAddrLen;
  19     PTA_IP_ADDRESS RequestAddressReturn;
  20     PTDI_CONNECTION_INFORMATION WhoIsConnecting;
  21
  22     /* Unpack TDI info -- We need the return connection information
  23      * struct to return the address so it can be filtered if needed
  24      * by WSAAccept -- The returned address will be passed on to
  25      * userland after we complete this irp */
  26     WhoIsConnecting = (PTDI_CONNECTION_INFORMATION)
  27         Request->ReturnConnectionInformation;
  28
  29     Status = TCPTranslateError
  30         ( OskitTCPAccept( Listener->SocketContext,
  31                           &Connection->SocketContext,
  32                           &OutAddr,
  33                           sizeof(OutAddr),
  34                           &OutAddrLen,
  35                           Request->RequestFlags & TDI_QUERY_ACCEPT ? 0 : 1 ) );
  36
  37     TI_DbgPrint(DEBUG_TCP,("Status %x\n", Status));
  38
  39     if( NT_SUCCESS(Status) && Status != STATUS_PENDING ) {
  40         RequestAddressReturn = WhoIsConnecting->RemoteAddress;
  41
  42         TI_DbgPrint(DEBUG_TCP,("Copying address to %x (Who %x)\n",
  43                                RequestAddressReturn, WhoIsConnecting));
  44
  45         RequestAddressReturn->TAAddressCount = 1;
  46         RequestAddressReturn->Address[0].AddressLength = OutAddrLen;
  47
  48         /* BSD uses the first byte of the sockaddr struct as a length.
  49          * Since windows doesn't do that we strip it */
  50         RequestAddressReturn->Address[0].AddressType =
  51             (OutAddr.sin_family >> 8) & 0xff;
  52
  53         RtlCopyMemory( &RequestAddressReturn->Address[0].Address,
  54                        ((PCHAR)&OutAddr) + sizeof(USHORT),
  55                        sizeof(RequestAddressReturn->Address[0].Address[0]) );
  56
  57         TI_DbgPrint(DEBUG_TCP,("Done copying\n"));
  58     }
  59
  60     TI_DbgPrint(DEBUG_TCP,("Status %x\n", Status));
  61
  62     return Status;
  63 }
  64
  65 /* This listen is on a socket we keep as internal.  That socket has the same
  66  * lifetime as the address file */
  67 NTSTATUS TCPListen( PCONNECTION_ENDPOINT Connection, UINT Backlog ) {
  68     NTSTATUS Status = STATUS_SUCCESS;
  69     SOCKADDR_IN AddressToBind;
  70
  71     TI_DbgPrint(DEBUG_TCP,("TCPListen started\n"));
  72
  73     TI_DbgPrint(DEBUG_TCP,("Connection->SocketContext %x\n",
  74         Connection->SocketContext));
  75
  76     ASSERT(Connection);
  77     ASSERT_KM_POINTER(Connection->SocketContext);
  78     ASSERT_KM_POINTER(Connection->AddressFile);
  79
  80     TcpipRecursiveMutexEnter( &TCPLock, TRUE );
  81
  82     AddressToBind.sin_family = AF_INET;
  83     memcpy( &AddressToBind.sin_addr,
  84             &Connection->AddressFile->Address.Address.IPv4Address,
  85             sizeof(AddressToBind.sin_addr) );
  86     AddressToBind.sin_port = Connection->AddressFile->Port;
  87
  88     TI_DbgPrint(DEBUG_TCP,("AddressToBind - %x:%x\n", AddressToBind.sin_addr, AddressToBind.sin_port));
  89
  90     OskitTCPBind( Connection->SocketContext,
  91                   Connection,
  92                   &AddressToBind,
  93                   sizeof(AddressToBind) );
  94
  95     Status = TCPTranslateError( OskitTCPListen( Connection->SocketContext,
  96                                                 Backlog ) );
  97
  98     TcpipRecursiveMutexLeave( &TCPLock );
  99
 100     TI_DbgPrint(DEBUG_TCP,("TCPListen finished %x\n", Status));
 101
 102     return Status;
 103 }
 104
 105 VOID TCPAbortListenForSocket( PCONNECTION_ENDPOINT Listener,
 106                               PCONNECTION_ENDPOINT Connection ) {
 107     PLIST_ENTRY ListEntry;
 108     PTDI_BUCKET Bucket;
 109
 110     TcpipRecursiveMutexEnter( &TCPLock, TRUE );
 111
 112     ListEntry = Listener->ListenRequest.Flink;
 113     while ( ListEntry != &Listener->ListenRequest ) {
 114         Bucket = CONTAINING_RECORD(ListEntry, TDI_BUCKET, Entry);
 115         ListEntry = ListEntry->Flink;
 116
 117         if( Bucket->AssociatedEndpoint == Connection ) {
 118             RemoveEntryList( ListEntry->Blink );
 119             ExFreePool( Bucket );
 120             break;
 121         }
 122     }
 123
 124    TcpipRecursiveMutexLeave( &TCPLock );
 125 }
 126
 127 NTSTATUS TCPAccept
 128 ( PTDI_REQUEST Request,
 129   PCONNECTION_ENDPOINT Listener,
 130   PCONNECTION_ENDPOINT Connection,
 131   PTCP_COMPLETION_ROUTINE Complete,
 132   PVOID Context ) {
 133    NTSTATUS Status;
 134    PTDI_BUCKET Bucket;
 135
 136    TI_DbgPrint(DEBUG_TCP,("TCPAccept started\n"));
 137
 138    TcpipRecursiveMutexEnter( &TCPLock, TRUE );
 139
 140    Status = TCPServiceListeningSocket( Listener, Connection,
 141                                        (PTDI_REQUEST_KERNEL)Request );
 142
 143    if( Status == STATUS_PENDING ) {
 144        Bucket = ExAllocatePool( NonPagedPool, sizeof(*Bucket) );
 145
 146        if( Bucket ) {
 147            Bucket->AssociatedEndpoint = Connection;
 148            Bucket->Request.RequestNotifyObject = Complete;
 149            Bucket->Request.RequestContext = Context;
 150            InsertHeadList( &Listener->ListenRequest, &Bucket->Entry );
 151        } else
 152            Status = STATUS_NO_MEMORY;
 153    }
 154
 155    TcpipRecursiveMutexLeave( &TCPLock );
 156
 157    TI_DbgPrint(DEBUG_TCP,("TCPAccept finished %x\n", Status));
 158    return Status;
 159 }