NetworkPkg/TcpDxe/TcpIo.c

   1 /** @file
   2   Implementation of I/O interfaces between TCP and IpIoLib.
   3
   4   Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR>
   5
   6   This program and the accompanying materials
   7   are licensed and made available under the terms and conditions of the BSD License
   8   which accompanies this distribution.  The full text of the license may be found at
   9   http://opensource.org/licenses/bsd-license.php.
  10
  11   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #include "TcpMain.h"
  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[in] Status        Result of the receive request.
  23   @param[in] IcmpErr       Valid when Status is EFI_ICMP_ERROR.
  24   @param[in] NetSession    The IP session for the received packet.
  25   @param[in] Pkt           Packet received.
  26   @param[in] Context       The data provided by the user for the received packet when
  27                            the callback is registered in IP_IO_OPEN_DATA::RcvdContext.
  28                            This is an optional parameter that may be NULL.
  29
  30 **/
  31 VOID
  32 EFIAPI
  33 TcpRxCallback (
  34   IN EFI_STATUS                       Status,
  35   IN UINT8                            IcmpErr,
  36   IN EFI_NET_SESSION_DATA             *NetSession,
  37   IN NET_BUF                          *Pkt,
  38   IN VOID                             *Context    OPTIONAL
  39   )
  40 {
  41   if (EFI_SUCCESS == Status) {
  42     TcpInput (Pkt, &NetSession->Source, &NetSession->Dest, NetSession->IpVersion);
  43   } else {
  44     TcpIcmpInput (
  45       Pkt,
  46       IcmpErr,
  47       &NetSession->Source,
  48       &NetSession->Dest,
  49       NetSession->IpVersion
  50       );
  51   }
  52 }
  53
  54 /**
  55   Send the segment to IP via IpIo function.
  56
  57   @param[in]  Tcb                Pointer to the TCP_CB of this TCP instance.
  58   @param[in]  Nbuf               Pointer to the TCP segment to be sent.
  59   @param[in]  Src                Source address of the TCP segment.
  60   @param[in]  Dest               Destination address of the TCP segment.
  61   @param[in]  Version            IP_VERSION_4 or IP_VERSION_6
  62
  63   @retval 0                      The segment was sent out successfully.
  64   @retval -1                     The segment failed to send.
  65
  66 **/
  67 INTN
  68 TcpSendIpPacket (
  69   IN TCP_CB          *Tcb,
  70   IN NET_BUF         *Nbuf,
  71   IN EFI_IP_ADDRESS  *Src,
  72   IN EFI_IP_ADDRESS  *Dest,
  73   IN UINT8           Version
  74   )
  75 {
  76   EFI_STATUS       Status;
  77   IP_IO            *IpIo;
  78   IP_IO_OVERRIDE   Override;
  79   SOCKET           *Sock;
  80   VOID             *IpSender;
  81   TCP_PROTO_DATA  *TcpProto;
  82
  83   if (NULL == Tcb) {
  84
  85     IpIo     = NULL;
  86     IpSender = IpIoFindSender (&IpIo, Version, Src);
  87
  88     if (IpSender == NULL) {
  89       DEBUG ((EFI_D_WARN, "TcpSendIpPacket: No appropriate IpSender.\n"));
  90       return -1;
  91     }
  92
  93     if (Version == IP_VERSION_6) {
  94       //
  95       // It's tricky here. EFI IPv6 Spec don't allow an instance overriding the
  96       // destination address if the dest is already specified through the
  97       // configuration data. Here we get the IpIo we need and use the default IP
  98       // instance in this IpIo to send the packet. The dest address is configured
  99       // to be the unspecified address for the default IP instance.
 100       //
 101       IpSender = NULL;
 102     }
 103   } else {
 104
 105     Sock     = Tcb->Sk;
 106     TcpProto = (TCP_PROTO_DATA *) Sock->ProtoReserved;
 107     IpIo     = TcpProto->TcpService->IpIo;
 108     IpSender = Tcb->IpInfo;
 109
 110     if (Version == IP_VERSION_6) {
 111       //
 112       // It's IPv6 and this TCP segment belongs to a solid TCB, in such case
 113       // the destination address can't be overridden, so reset the Dest to NULL.
 114       //
 115       if (!Tcb->RemoteIpZero) {
 116         Dest = NULL;
 117       }
 118     }
 119   }
 120
 121   ASSERT (Version == IpIo->IpVersion);
 122
 123   if (Version == IP_VERSION_4) {
 124     Override.Ip4OverrideData.TypeOfService = 0;
 125     Override.Ip4OverrideData.TimeToLive    = 255;
 126     Override.Ip4OverrideData.DoNotFragment = FALSE;
 127     Override.Ip4OverrideData.Protocol      = EFI_IP_PROTO_TCP;
 128     ZeroMem (&Override.Ip4OverrideData.GatewayAddress, sizeof (EFI_IPv4_ADDRESS));
 129     CopyMem (&Override.Ip4OverrideData.SourceAddress, Src, sizeof (EFI_IPv4_ADDRESS));
 130   } else {
 131     Override.Ip6OverrideData.Protocol  = EFI_IP_PROTO_TCP;
 132     Override.Ip6OverrideData.HopLimit  = 255;
 133     Override.Ip6OverrideData.FlowLabel = 0;
 134   }
 135
 136   Status = IpIoSend (IpIo, Nbuf, IpSender, NULL, NULL, Dest, &Override);
 137
 138   if (EFI_ERROR (Status)) {
 139     DEBUG ((EFI_D_ERROR, "TcpSendIpPacket: return %r error\n", Status));
 140     return -1;
 141   }
 142
 143   return 0;
 144 }
 145
 146 /**
 147   Refresh the remote peer's Neighbor Cache State if already exists.
 148
 149   @param[in]  Tcb                Pointer to the TCP_CB of this TCP instance.
 150   @param[in]  Neighbor           Source address of the TCP segment.
 151   @param[in]  Timeout            Time in 100-ns units that this entry will remain
 152                                  in the neighbor cache. A value of zero means that
 153                                  the entry  is permanent. A value of non-zero means
 154                                  that the entry is dynamic and will be deleted
 155                                  after Timeout.
 156
 157   @retval EFI_SUCCESS            Successfully updated the neighbor relationship.
 158   @retval EFI_NOT_STARTED        The IpIo is not configured.
 159   @retval EFI_INVALID_PARAMETER  Any input parameter is invalid.
 160   @retval EFI_OUT_OF_RESOURCES   Failed to allocate some resources.
 161   @retval EFI_NOT_FOUND          This entry is not in the neighbor table.
 162
 163 **/
 164 EFI_STATUS
 165 Tcp6RefreshNeighbor (
 166   IN TCP_CB          *Tcb,
 167   IN EFI_IP_ADDRESS  *Neighbor,
 168   IN UINT32          Timeout
 169   )
 170 {
 171   IP_IO            *IpIo;
 172   SOCKET           *Sock;
 173   TCP_PROTO_DATA  *TcpProto;
 174
 175   if (NULL == Tcb) {
 176     IpIo = NULL;
 177     IpIoFindSender (&IpIo, IP_VERSION_6, Neighbor);
 178
 179     if (IpIo == NULL) {
 180       DEBUG ((EFI_D_WARN, "Tcp6AddNeighbor: No appropriate IpIo.\n"));
 181       return EFI_NOT_STARTED;
 182     }
 183
 184   } else {
 185     Sock     = Tcb->Sk;
 186     TcpProto = (TCP_PROTO_DATA *) Sock->ProtoReserved;
 187     IpIo     = TcpProto->TcpService->IpIo;
 188   }
 189
 190   return IpIoRefreshNeighbor (IpIo, Neighbor, Timeout);
 191 }
 192