MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Io.c

   1 /** @file
   2   I/O interfaces between TCP and IpIo.
   3
   4 Copyright (c) 2005 - 2009, Intel Corporation. All rights reserved.<BR>
   5 This program and the accompanying materials
   6 are licensed and made available under the terms and conditions of the BSD License
   7 which accompanies this distribution.  The full text of the license may be found at
   8 http://opensource.org/licenses/bsd-license.php<BR>
   9
  10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include "Tcp4Main.h"
  16
  17
  18 /**
  19   Packet receive callback function provided to IP_IO, used to call
  20   the proper function to handle the packet received by IP.
  21
  22   @param  Status      Status of the received packet.
  23   @param  IcmpErr     ICMP error number.
  24   @param  NetSession  Pointer to the net session of this packet.
  25   @param  Pkt         Pointer to the recieved packet.
  26   @param  Context     Pointer to the context configured in IpIoOpen(), not used
  27                       now.
  28
  29 **/
  30 VOID
  31 EFIAPI
  32 Tcp4RxCallback (
  33   IN EFI_STATUS                       Status,
  34   IN UINT8                            IcmpErr,
  35   IN EFI_NET_SESSION_DATA             *NetSession,
  36   IN NET_BUF                          *Pkt,
  37   IN VOID                             *Context    OPTIONAL
  38   )
  39 {
  40   if (EFI_SUCCESS == Status) {
  41     TcpInput (Pkt, NetSession->Source.Addr[0], NetSession->Dest.Addr[0]);
  42   } else {
  43     TcpIcmpInput (Pkt, IcmpErr, NetSession->Source.Addr[0], NetSession->Dest.Addr[0]);
  44   }
  45 }
  46
  47
  48 /**
  49   Send the segment to IP via IpIo function.
  50
  51   @param  Tcb         Pointer to the TCP_CB of this TCP instance.
  52   @param  Nbuf        Pointer to the TCP segment to be sent.
  53   @param  Src         Source address of the TCP segment.
  54   @param  Dest        Destination address of the TCP segment.
  55
  56   @retval 0           The segment was sent out successfully.
  57   @retval -1          The segment was failed to send.
  58
  59 **/
  60 INTN
  61 TcpSendIpPacket (
  62   IN TCP_CB    *Tcb,
  63   IN NET_BUF   *Nbuf,
  64   IN UINT32    Src,
  65   IN UINT32    Dest
  66   )
  67 {
  68   EFI_STATUS       Status;
  69   IP_IO            *IpIo;
  70   IP_IO_OVERRIDE   Override;
  71   SOCKET           *Sock;
  72   VOID             *IpSender;
  73   TCP4_PROTO_DATA  *TcpProto;
  74   EFI_IP_ADDRESS   Source;
  75   EFI_IP_ADDRESS   Destination;
  76
  77   Source.Addr[0]      = Src;
  78   Destination.Addr[0] = Dest;
  79
  80   if (NULL == Tcb) {
  81
  82     IpIo     = NULL;
  83     IpSender = IpIoFindSender (&IpIo, IP_VERSION_4, &Source);
  84
  85     if (IpSender == NULL) {
  86       DEBUG ((EFI_D_WARN, "TcpSendIpPacket: No appropriate IpSender.\n"));
  87       return -1;
  88     }
  89   } else {
  90
  91     Sock     = Tcb->Sk;
  92     TcpProto = (TCP4_PROTO_DATA *) Sock->ProtoReserved;
  93     IpIo     = TcpProto->TcpService->IpIo;
  94     IpSender = Tcb->IpInfo;
  95   }
  96
  97   Override.Ip4OverrideData.TypeOfService            = 0;
  98   Override.Ip4OverrideData.TimeToLive               = 255;
  99   Override.Ip4OverrideData.DoNotFragment            = FALSE;
 100   Override.Ip4OverrideData.Protocol                 = EFI_IP_PROTO_TCP;
 101   ZeroMem (&Override.Ip4OverrideData.GatewayAddress, sizeof (EFI_IPv4_ADDRESS));
 102   CopyMem (&Override.Ip4OverrideData.SourceAddress, &Src, sizeof (EFI_IPv4_ADDRESS));
 103
 104   Status = IpIoSend (IpIo, Nbuf, IpSender, NULL, NULL, &Destination, &Override);
 105
 106   if (EFI_ERROR (Status)) {
 107     DEBUG ((EFI_D_ERROR, "TcpSendIpPacket: return %r error\n", Status));
 108     return -1;
 109   }
 110
 111   return 0;
 112 }