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     ASSERT_LOCKED(&TCPLock);
  23
  24     /* Unpack TDI info -- We need the return connection information
  25      * struct to return the address so it can be filtered if needed
  26      * by WSAAccept -- The returned address will be passed on to
  27      * userland after we complete this irp */
  28     WhoIsConnecting = (PTDI_CONNECTION_INFORMATION)
  29     Request->ReturnConnectionInformation;
  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     TI_DbgPrint(DEBUG_TCP,("Status %x\n", Status));
  40
  41     if( NT_SUCCESS(Status) && Status != STATUS_PENDING ) {
  42     RequestAddressReturn = WhoIsConnecting->RemoteAddress;
  43
  44     TI_DbgPrint(DEBUG_TCP,("Copying address to %x (Who %x)\n",
  45                    RequestAddressReturn, WhoIsConnecting));
  46
  47         RequestAddressReturn->TAAddressCount = 1;
  48     RequestAddressReturn->Address[0].AddressLength = OutAddrLen;
  49
  50         /* BSD uses the first byte of the sockaddr struct as a length.
  51          * Since windows doesn't do that we strip it */
  52     RequestAddressReturn->Address[0].AddressType =
  53         (OutAddr.sin_family >> 8) & 0xff;
  54
  55     RtlCopyMemory( &RequestAddressReturn->Address[0].Address,
  56                ((PCHAR)&OutAddr) + sizeof(USHORT),
  57                sizeof(RequestAddressReturn->Address[0].Address[0]) );
  58
  59     TI_DbgPrint(DEBUG_TCP,("Done copying\n"));
  60     }
  61
  62     TI_DbgPrint(DEBUG_TCP,("Status %x\n", Status));
  63
  64     return Status;
  65 }
  66
  67 /* This listen is on a socket we keep as internal.  That socket has the same
  68  * lifetime as the address file */
  69 NTSTATUS TCPListen( PCONNECTION_ENDPOINT Connection, UINT Backlog ) {
  70     NTSTATUS Status = STATUS_SUCCESS;
  71     SOCKADDR_IN AddressToBind;
  72
  73     TcpipRecursiveMutexEnter( &TCPLock, TRUE );
  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     Status = TCPTranslateError( OskitTCPBind( Connection->SocketContext,
  93                         &AddressToBind,
  94                         sizeof(AddressToBind) ) );
  95
  96     if (NT_SUCCESS(Status))
  97         Status = TCPTranslateError( OskitTCPListen( Connection->SocketContext, Backlog ) );
  98
  99     TcpipRecursiveMutexLeave( &TCPLock );
 100
 101     TI_DbgPrint(DEBUG_TCP,("TCPListen finished %x\n", Status));
 102
 103     return Status;
 104 }
 105
 106 VOID TCPAbortListenForSocket( PCONNECTION_ENDPOINT Listener,
 107                   PCONNECTION_ENDPOINT Connection ) {
 108     PLIST_ENTRY ListEntry;
 109     PTDI_BUCKET Bucket;
 110     KIRQL OldIrql;
 111
 112     KeAcquireSpinLock(&Listener->Lock, &OldIrql);
 113
 114     ListEntry = Listener->ListenRequest.Flink;
 115     while ( ListEntry != &Listener->ListenRequest ) {
 116     Bucket = CONTAINING_RECORD(ListEntry, TDI_BUCKET, Entry);
 117
 118     if( Bucket->AssociatedEndpoint == Connection ) {
 119         RemoveEntryList( &Bucket->Entry );
 120         exFreePool( Bucket );
 121         break;
 122     }
 123
 124     ListEntry = ListEntry->Flink;
 125     }
 126
 127     KeReleaseSpinLock(&Listener->Lock, OldIrql);
 128 }
 129
 130 NTSTATUS TCPAccept ( PTDI_REQUEST Request,
 131                      PCONNECTION_ENDPOINT Listener,
 132                      PCONNECTION_ENDPOINT Connection,
 133                      PTCP_COMPLETION_ROUTINE Complete,
 134                      PVOID Context )
 135 {
 136     NTSTATUS Status;
 137     PTDI_BUCKET Bucket;
 138
 139     TI_DbgPrint(DEBUG_TCP,("TCPAccept started\n"));
 140
 141     TcpipRecursiveMutexEnter( &TCPLock, TRUE );
 142
 143     Status = TCPServiceListeningSocket( Listener, Connection,
 144                        (PTDI_REQUEST_KERNEL)Request );
 145
 146     TcpipRecursiveMutexLeave( &TCPLock );
 147
 148     if( Status == STATUS_PENDING ) {
 149         Bucket = exAllocatePool( NonPagedPool, sizeof(*Bucket) );
 150
 151         if( Bucket ) {
 152             Bucket->AssociatedEndpoint = Connection;
 153             Bucket->Request.RequestNotifyObject = Complete;
 154             Bucket->Request.RequestContext = Context;
 155             IoMarkIrpPending((PIRP)Context);
 156             ExInterlockedInsertTailList( &Listener->ListenRequest, &Bucket->Entry, &Listener->Lock );
 157         } else
 158             Status = STATUS_NO_MEMORY;
 159     }
 160
 161     TI_DbgPrint(DEBUG_TCP,("TCPAccept finished %x\n", Status));
 162     return Status;
 163 }