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 /* Listener->Lock MUST be acquired */
  14 NTSTATUS TCPServiceListeningSocket( PCONNECTION_ENDPOINT Listener,
  15                     PCONNECTION_ENDPOINT Connection,
  16                     PTDI_REQUEST_KERNEL Request ) {
  17     NTSTATUS Status;
  18     SOCKADDR_IN OutAddr;
  19     OSK_UINT OutAddrLen;
  20     PTA_IP_ADDRESS RequestAddressReturn;
  21     PTDI_CONNECTION_INFORMATION WhoIsConnecting;
  22
  23     /* Unpack TDI info -- We need the return connection information
  24      * struct to return the address so it can be filtered if needed
  25      * by WSAAccept -- The returned address will be passed on to
  26      * userland after we complete this irp */
  27     WhoIsConnecting = (PTDI_CONNECTION_INFORMATION)
  28     Request->ReturnConnectionInformation;
  29
  30     Status = TCPTranslateError
  31     ( OskitTCPAccept( Listener,
  32               &Connection->SocketContext,
  33               Connection,
  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 = TDI_ADDRESS_LENGTH_IP;
  49         RequestAddressReturn->Address[0].AddressType = TDI_ADDRESS_TYPE_IP;
  50         RequestAddressReturn->Address[0].Address[0].sin_port = OutAddr.sin_port;
  51         RequestAddressReturn->Address[0].Address[0].in_addr = OutAddr.sin_addr.s_addr;
  52         RtlZeroMemory(RequestAddressReturn->Address[0].Address[0].sin_zero, 8);
  53
  54         TI_DbgPrint(DEBUG_TCP,("Done copying\n"));
  55     }
  56
  57     TI_DbgPrint(DEBUG_TCP,("Status %x\n", Status));
  58
  59     return Status;
  60 }
  61
  62 /* This listen is on a socket we keep as internal.  That socket has the same
  63  * lifetime as the address file */
  64 NTSTATUS TCPListen( PCONNECTION_ENDPOINT Connection, UINT Backlog ) {
  65     NTSTATUS Status = STATUS_SUCCESS;
  66     SOCKADDR_IN AddressToBind;
  67     KIRQL OldIrql;
  68     TA_IP_ADDRESS LocalAddress;
  69
  70     ASSERT(Connection);
  71
  72     LockObject(Connection, &OldIrql);
  73
  74     ASSERT_KM_POINTER(Connection->AddressFile);
  75
  76     TI_DbgPrint(DEBUG_TCP,("TCPListen started\n"));
  77
  78     if (Connection->AddressFile->Port)
  79     {
  80         AddressToBind.sin_family = AF_INET;
  81         memcpy( &AddressToBind.sin_addr,
  82                &Connection->AddressFile->Address.Address.IPv4Address,
  83                sizeof(AddressToBind.sin_addr) );
  84         AddressToBind.sin_port = Connection->AddressFile->Port;
  85         TI_DbgPrint(DEBUG_TCP,("AddressToBind - %x:%x\n", AddressToBind.sin_addr, AddressToBind.sin_port));
  86
  87         /* Perform an explicit bind */
  88         Status = TCPTranslateError(OskitTCPBind(Connection,
  89                                                 &AddressToBind,
  90                                                 sizeof(AddressToBind)));
  91     }
  92     else
  93     {
  94         /* An implicit bind will be performed */
  95         Status = STATUS_SUCCESS;
  96     }
  97
  98     if (NT_SUCCESS(Status))
  99         Status = TCPTranslateError( OskitTCPListen( Connection, Backlog ) );
 100
 101     if (NT_SUCCESS(Status))
 102     {
 103         /* Check if we had an unspecified port */
 104         if (!Connection->AddressFile->Port)
 105         {
 106             /* We did, so we need to copy back the port */
 107             if (NT_SUCCESS(TCPGetSockAddress(Connection, (PTRANSPORT_ADDRESS)&LocalAddress, FALSE)))
 108             {
 109                 /* Allocate the port in the port bitmap */
 110                 Connection->AddressFile->Port = TCPAllocatePort(LocalAddress.Address[0].Address[0].sin_port);
 111
 112                 /* This should never fail */
 113                 ASSERT(Connection->AddressFile->Port != 0xFFFF);
 114             }
 115         }
 116     }
 117
 118     UnlockObject(Connection, OldIrql);
 119
 120     TI_DbgPrint(DEBUG_TCP,("TCPListen finished %x\n", Status));
 121
 122     return Status;
 123 }
 124
 125 BOOLEAN TCPAbortListenForSocket( PCONNECTION_ENDPOINT Listener,
 126                   PCONNECTION_ENDPOINT Connection ) {
 127     PLIST_ENTRY ListEntry;
 128     PTDI_BUCKET Bucket;
 129     KIRQL OldIrql;
 130     BOOLEAN Found = FALSE;
 131
 132     LockObject(Listener, &OldIrql);
 133
 134     ListEntry = Listener->ListenRequest.Flink;
 135     while ( ListEntry != &Listener->ListenRequest ) {
 136     Bucket = CONTAINING_RECORD(ListEntry, TDI_BUCKET, Entry);
 137
 138     if( Bucket->AssociatedEndpoint == Connection ) {
 139         DereferenceObject(Bucket->AssociatedEndpoint);
 140         RemoveEntryList( &Bucket->Entry );
 141         ExFreePoolWithTag( Bucket, TDI_BUCKET_TAG );
 142         Found = TRUE;
 143         break;
 144     }
 145
 146     ListEntry = ListEntry->Flink;
 147     }
 148
 149     UnlockObject(Listener, OldIrql);
 150
 151     return Found;
 152 }
 153
 154 NTSTATUS TCPAccept ( PTDI_REQUEST Request,
 155                      PCONNECTION_ENDPOINT Listener,
 156                      PCONNECTION_ENDPOINT Connection,
 157                      PTCP_COMPLETION_ROUTINE Complete,
 158                      PVOID Context )
 159 {
 160     NTSTATUS Status;
 161     PTDI_BUCKET Bucket;
 162     KIRQL OldIrql;
 163
 164     TI_DbgPrint(DEBUG_TCP,("TCPAccept started\n"));
 165
 166     LockObject(Listener, &OldIrql);
 167
 168     Status = TCPServiceListeningSocket( Listener, Connection,
 169                        (PTDI_REQUEST_KERNEL)Request );
 170
 171     if( Status == STATUS_PENDING ) {
 172         Bucket = ExAllocatePoolWithTag( NonPagedPool, sizeof(*Bucket),
 173                                         TDI_BUCKET_TAG );
 174
 175         if( Bucket ) {
 176             ReferenceObject(Connection);
 177             Bucket->AssociatedEndpoint = Connection;
 178             Bucket->Request.RequestNotifyObject = Complete;
 179             Bucket->Request.RequestContext = Context;
 180             InsertTailList( &Listener->ListenRequest, &Bucket->Entry );
 181         } else
 182             Status = STATUS_NO_MEMORY;
 183     }
 184
 185     UnlockObject(Listener, OldIrql);
 186
 187     TI_DbgPrint(DEBUG_TCP,("TCPAccept finished %x\n", Status));
 188     return Status;
 189 }