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/** @file
Implementation of I/O interfaces between TCP and IpIoLib.
Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "TcpMain.h"
/**
Packet receive callback function provided to IP_IO, used to call
the proper function to handle the packet received by IP.
@param[in] Status Result of the receive request.
@param[in] IcmpErr Valid when Status is EFI_ICMP_ERROR.
@param[in] NetSession The IP session for the received packet.
@param[in] Pkt Packet received.
@param[in] Context The data provided by the user for the received packet when
the callback is registered in IP_IO_OPEN_DATA::RcvdContext.
This is an optional parameter that may be NULL.
**/
VOID
EFIAPI
TcpRxCallback (
IN EFI_STATUS Status,
IN UINT8 IcmpErr,
IN EFI_NET_SESSION_DATA *NetSession,
IN NET_BUF *Pkt,
IN VOID *Context OPTIONAL
)
{
if (EFI_SUCCESS == Status) {
TcpInput (Pkt, &NetSession->Source, &NetSession->Dest, NetSession->IpVersion);
} else {
TcpIcmpInput (
Pkt,
IcmpErr,
&NetSession->Source,
&NetSession->Dest,
NetSession->IpVersion
);
}
}
/**
Send the segment to IP via IpIo function.
@param[in] Tcb Pointer to the TCP_CB of this TCP instance.
@param[in] Nbuf Pointer to the TCP segment to be sent.
@param[in] Src Source address of the TCP segment.
@param[in] Dest Destination address of the TCP segment.
@param[in] Version IP_VERSION_4 or IP_VERSION_6
@retval 0 The segment was sent out successfully.
@retval -1 The segment failed to send.
**/
INTN
TcpSendIpPacket (
IN TCP_CB *Tcb,
IN NET_BUF *Nbuf,
IN EFI_IP_ADDRESS *Src,
IN EFI_IP_ADDRESS *Dest,
IN UINT8 Version
)
{
EFI_STATUS Status;
IP_IO *IpIo;
IP_IO_OVERRIDE Override;
SOCKET *Sock;
VOID *IpSender;
TCP_PROTO_DATA *TcpProto;
if (NULL == Tcb) {
IpIo = NULL;
IpSender = IpIoFindSender (&IpIo, Version, Src);
if (IpSender == NULL) {
DEBUG ((DEBUG_WARN, "TcpSendIpPacket: No appropriate IpSender.\n"));
return -1;
}
if (Version == IP_VERSION_6) {
//
// It's tricky here. EFI IPv6 Spec don't allow an instance overriding the
// destination address if the dest is already specified through the
// configuration data. Here we get the IpIo we need and use the default IP
// instance in this IpIo to send the packet. The dest address is configured
// to be the unspecified address for the default IP instance.
//
IpSender = NULL;
}
} else {
Sock = Tcb->Sk;
TcpProto = (TCP_PROTO_DATA *) Sock->ProtoReserved;
IpIo = TcpProto->TcpService->IpIo;
IpSender = Tcb->IpInfo;
if (Version == IP_VERSION_6) {
//
// It's IPv6 and this TCP segment belongs to a solid TCB, in such case
// the destination address can't be overridden, so reset the Dest to NULL.
//
if (!Tcb->RemoteIpZero) {
Dest = NULL;
}
}
}
ASSERT (Version == IpIo->IpVersion);
if (Version == IP_VERSION_4) {
Override.Ip4OverrideData.TypeOfService = 0;
Override.Ip4OverrideData.TimeToLive = 255;
Override.Ip4OverrideData.DoNotFragment = FALSE;
Override.Ip4OverrideData.Protocol = EFI_IP_PROTO_TCP;
ZeroMem (&Override.Ip4OverrideData.GatewayAddress, sizeof (EFI_IPv4_ADDRESS));
CopyMem (&Override.Ip4OverrideData.SourceAddress, Src, sizeof (EFI_IPv4_ADDRESS));
} else {
Override.Ip6OverrideData.Protocol = EFI_IP_PROTO_TCP;
Override.Ip6OverrideData.HopLimit = 255;
Override.Ip6OverrideData.FlowLabel = 0;
}
Status = IpIoSend (IpIo, Nbuf, IpSender, NULL, NULL, Dest, &Override);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "TcpSendIpPacket: return %r error\n", Status));
return -1;
}
return 0;
}
/**
Refresh the remote peer's Neighbor Cache State if already exists.
@param[in] Tcb Pointer to the TCP_CB of this TCP instance.
@param[in] Neighbor Source address of the TCP segment.
@param[in] Timeout Time in 100-ns units that this entry will remain
in the neighbor cache. A value of zero means that
the entry is permanent. A value of non-zero means
that the entry is dynamic and will be deleted
after Timeout.
@retval EFI_SUCCESS Successfully updated the neighbor relationship.
@retval EFI_NOT_STARTED The IpIo is not configured.
@retval EFI_INVALID_PARAMETER Any input parameter is invalid.
@retval EFI_OUT_OF_RESOURCES Failed to allocate some resources.
@retval EFI_NOT_FOUND This entry is not in the neighbor table.
**/
EFI_STATUS
Tcp6RefreshNeighbor (
IN TCP_CB *Tcb,
IN EFI_IP_ADDRESS *Neighbor,
IN UINT32 Timeout
)
{
IP_IO *IpIo;
SOCKET *Sock;
TCP_PROTO_DATA *TcpProto;
if (NULL == Tcb) {
IpIo = NULL;
IpIoFindSender (&IpIo, IP_VERSION_6, Neighbor);
if (IpIo == NULL) {
DEBUG ((DEBUG_WARN, "Tcp6AddNeighbor: No appropriate IpIo.\n"));
return EFI_NOT_STARTED;
}
} else {
Sock = Tcb->Sk;
TcpProto = (TCP_PROTO_DATA *) Sock->ProtoReserved;
IpIo = TcpProto->TcpService->IpIo;
}
return IpIoRefreshNeighbor (IpIo, Neighbor, Timeout);
}
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