MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Io.c

   1 /** @file
   2   I/O interfaces between TCP and IpIo.
   3
   4 Copyright (c) 2005 - 2009, Intel Corporation<BR>
   5 All rights reserved. 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 Tcp4RxCallback (
  32   IN EFI_STATUS                       Status,
  33   IN UINT8                            IcmpErr,
  34   IN EFI_NET_SESSION_DATA             *NetSession,
  35   IN NET_BUF                          *Pkt,
  36   IN VOID                             *Context    OPTIONAL
  37   )
  38 {
  39   if (EFI_SUCCESS == Status) {
  40     TcpInput (Pkt, NetSession->Source.Addr[0], NetSession->Dest.Addr[0]);
  41   } else {
  42     TcpIcmpInput (Pkt, IcmpErr, NetSession->Source.Addr[0], NetSession->Dest.Addr[0]);
  43   }
  44 }
  45
  46
  47 /**
  48   Send the segment to IP via IpIo function.
  49
  50   @param  Tcb         Pointer to the TCP_CB of this TCP instance.
  51   @param  Nbuf        Pointer to the TCP segment to be sent.
  52   @param  Src         Source address of the TCP segment.
  53   @param  Dest        Destination address of the TCP segment.
  54
  55   @retval 0           The segment was sent out successfully.
  56   @retval -1          The segment was failed to send.
  57
  58 **/
  59 INTN
  60 TcpSendIpPacket (
  61   IN TCP_CB    *Tcb,
  62   IN NET_BUF   *Nbuf,
  63   IN UINT32    Src,
  64   IN UINT32    Dest
  65   )
  66 {
  67   EFI_STATUS       Status;
  68   IP_IO            *IpIo;
  69   IP_IO_OVERRIDE   Override;
  70   SOCKET           *Sock;
  71   VOID             *IpSender;
  72   TCP4_PROTO_DATA  *TcpProto;
  73   EFI_IP_ADDRESS   Source;
  74   EFI_IP_ADDRESS   Destination;
  75
  76   Source.Addr[0]      = Src;
  77   Destination.Addr[0] = Dest;
  78
  79   if (NULL == Tcb) {
  80
  81     IpIo     = NULL;
  82     IpSender = IpIoFindSender (&IpIo, IP_VERSION_4, &Source);
  83
  84     if (IpSender == NULL) {
  85       DEBUG ((EFI_D_WARN, "TcpSendIpPacket: No appropriate IpSender.\n"));
  86       return -1;
  87     }
  88   } else {
  89
  90     Sock     = Tcb->Sk;
  91     TcpProto = (TCP4_PROTO_DATA *) Sock->ProtoReserved;
  92     IpIo     = TcpProto->TcpService->IpIo;
  93     IpSender = Tcb->IpInfo;
  94   }
  95
  96   Override.Ip4OverrideData.TypeOfService            = 0;
  97   Override.Ip4OverrideData.TimeToLive               = 255;
  98   Override.Ip4OverrideData.DoNotFragment            = FALSE;
  99   Override.Ip4OverrideData.Protocol                 = EFI_IP_PROTO_TCP;
 100   ZeroMem (&Override.Ip4OverrideData.GatewayAddress, sizeof (EFI_IPv4_ADDRESS));
 101   CopyMem (&Override.Ip4OverrideData.SourceAddress, &Src, sizeof (EFI_IPv4_ADDRESS));
 102
 103   Status = IpIoSend (IpIo, Nbuf, IpSender, NULL, NULL, &Destination, &Override);
 104
 105   if (EFI_ERROR (Status)) {
 106     DEBUG ((EFI_D_ERROR, "TcpSendIpPacket: return %r error\n", Status));
 107     return -1;
 108   }
 109
 110   return 0;
 111 }