reactos/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     TcpipRecursiveMutexEnter(&TCPLock);
  30
  31     Status = TCPTranslateError
  32     ( OskitTCPAccept( Listener->SocketContext,
  33               &Connection->SocketContext,
  34               &OutAddr,
  35               sizeof(OutAddr),
  36               &OutAddrLen,
  37               Request->RequestFlags & TDI_QUERY_ACCEPT ? 0 : 1 ) );
  38
  39     TcpipRecursiveMutexLeave(&TCPLock);
  40
  41     TI_DbgPrint(DEBUG_TCP,("Status %x\n", Status));
  42
  43     if( NT_SUCCESS(Status) && Status != STATUS_PENDING ) {
  44     RequestAddressReturn = WhoIsConnecting->RemoteAddress;
  45
  46     TI_DbgPrint(DEBUG_TCP,("Copying address to %x (Who %x)\n",
  47                    RequestAddressReturn, WhoIsConnecting));
  48
  49         RequestAddressReturn->TAAddressCount = 1;
  50     RequestAddressReturn->Address[0].AddressLength = OutAddrLen;
  51
  52         /* BSD uses the first byte of the sockaddr struct as a length.
  53          * Since windows doesn't do that we strip it */
  54     RequestAddressReturn->Address[0].AddressType =
  55         (OutAddr.sin_family >> 8) & 0xff;
  56
  57     RtlCopyMemory( &RequestAddressReturn->Address[0].Address,
  58                ((PCHAR)&OutAddr) + sizeof(USHORT),
  59                sizeof(RequestAddressReturn->Address[0].Address[0]) );
  60
  61     TI_DbgPrint(DEBUG_TCP,("Done copying\n"));
  62     }
  63
  64     TI_DbgPrint(DEBUG_TCP,("Status %x\n", Status));
  65
  66     return Status;
  67 }
  68
  69 /* This listen is on a socket we keep as internal.  That socket has the same
  70  * lifetime as the address file */
  71 NTSTATUS TCPListen( PCONNECTION_ENDPOINT Connection, UINT Backlog ) {
  72     NTSTATUS Status = STATUS_SUCCESS;
  73     SOCKADDR_IN AddressToBind;
  74
  75     ASSERT(Connection);
  76     ASSERT_KM_POINTER(Connection->SocketContext);
  77     ASSERT_KM_POINTER(Connection->AddressFile);
  78
  79     TI_DbgPrint(DEBUG_TCP,("TCPListen started\n"));
  80
  81     TI_DbgPrint(DEBUG_TCP,("Connection->SocketContext %x\n",
  82     Connection->SocketContext));
  83
  84     AddressToBind.sin_family = AF_INET;
  85     memcpy( &AddressToBind.sin_addr,
  86         &Connection->AddressFile->Address.Address.IPv4Address,
  87         sizeof(AddressToBind.sin_addr) );
  88     AddressToBind.sin_port = Connection->AddressFile->Port;
  89
  90     TI_DbgPrint(DEBUG_TCP,("AddressToBind - %x:%x\n", AddressToBind.sin_addr, AddressToBind.sin_port));
  91
  92     TcpipRecursiveMutexEnter( &TCPLock );
  93
  94     Status = TCPTranslateError( OskitTCPBind( Connection->SocketContext,
  95                         &AddressToBind,
  96                         sizeof(AddressToBind) ) );
  97
  98     if (NT_SUCCESS(Status))
  99         Status = TCPTranslateError( OskitTCPListen( Connection->SocketContext, Backlog ) );
 100
 101     TcpipRecursiveMutexLeave( &TCPLock );
 102
 103     TI_DbgPrint(DEBUG_TCP,("TCPListen finished %x\n", Status));
 104
 105     return Status;
 106 }
 107
 108 VOID TCPAbortListenForSocket( PCONNECTION_ENDPOINT Listener,
 109                   PCONNECTION_ENDPOINT Connection ) {
 110     PLIST_ENTRY ListEntry;
 111     PTDI_BUCKET Bucket;
 112     KIRQL OldIrql;
 113
 114     KeAcquireSpinLock(&Listener->Lock, &OldIrql);
 115
 116     ListEntry = Listener->ListenRequest.Flink;
 117     while ( ListEntry != &Listener->ListenRequest ) {
 118     Bucket = CONTAINING_RECORD(ListEntry, TDI_BUCKET, Entry);
 119
 120     if( Bucket->AssociatedEndpoint == Connection ) {
 121         RemoveEntryList( &Bucket->Entry );
 122         exFreePool( Bucket );
 123         break;
 124     }
 125
 126     ListEntry = ListEntry->Flink;
 127     }
 128
 129     KeReleaseSpinLock(&Listener->Lock, OldIrql);
 130 }
 131
 132 NTSTATUS TCPAccept ( PTDI_REQUEST Request,
 133                      PCONNECTION_ENDPOINT Listener,
 134                      PCONNECTION_ENDPOINT Connection,
 135                      PTCP_COMPLETION_ROUTINE Complete,
 136                      PVOID Context )
 137 {
 138     NTSTATUS Status;
 139     PTDI_BUCKET Bucket;
 140
 141     TI_DbgPrint(DEBUG_TCP,("TCPAccept started\n"));
 142
 143     Status = TCPServiceListeningSocket( Listener, Connection,
 144                        (PTDI_REQUEST_KERNEL)Request );
 145
 146     if( Status == STATUS_PENDING ) {
 147         Bucket = exAllocatePool( NonPagedPool, sizeof(*Bucket) );
 148
 149         if( Bucket ) {
 150             Bucket->AssociatedEndpoint = Connection;
 151             Bucket->Request.RequestNotifyObject = Complete;
 152             Bucket->Request.RequestContext = Context;
 153             IoMarkIrpPending((PIRP)Context);
 154             ExInterlockedInsertTailList( &Listener->ListenRequest, &Bucket->Entry, &Listener->Lock );
 155         } else
 156             Status = STATUS_NO_MEMORY;
 157     }
 158
 159     TI_DbgPrint(DEBUG_TCP,("TCPAccept finished %x\n", Status));
 160     return Status;
 161 }