/**
Compute the window scale value according to the given buffer size.
@param[in] Tcb Pointer to the TCP_CB of this TCP instance.
@return The scale value.
**/
UINT8
TcpComputeScale (
IN TCP_CB *Tcb
)
{
UINT8 Scale;
UINT32 BufSize;
ASSERT ((Tcb != NULL) && (Tcb->Sk != NULL));
BufSize = GET_RCV_BUFFSIZE (Tcb->Sk);
Scale = 0;
while ((Scale < TCP_OPTION_MAX_WS) && ((UINT32) (TCP_OPTION_MAX_WIN << Scale) < BufSize)) {
Scale++;
}
return Scale;
}
/**
Get the operational settings of this TCP instance.
@param Tcb Pointer to the TCP_CB of this TCP instance.
@param Mode Pointer to the buffer to store the operational
settings.
@retval EFI_SUCCESS The mode data is read.
@retval EFI_NOT_STARTED No configuration data is available because this
instance hasn't been started.
**/
EFI_STATUS
Tcp4GetMode (
IN TCP_CB *Tcb,
IN OUT TCP4_MODE_DATA *Mode
)
{
SOCKET *Sock;
EFI_TCP4_CONFIG_DATA *ConfigData;
EFI_TCP4_ACCESS_POINT *AccessPoint;
EFI_TCP4_OPTION *Option;
EFI_IP4_PROTOCOL *Ip;
Sock = Tcb->Sk;
if (!SOCK_IS_CONFIGURED (Sock) && (Mode->Tcp4ConfigData != NULL)) {
return EFI_NOT_STARTED;
}
if (Mode->Tcp4State != NULL) {
*(Mode->Tcp4State) = (EFI_TCP4_CONNECTION_STATE) Tcb->State;
}
if (Mode->Tcp4ConfigData != NULL) {
ConfigData = Mode->Tcp4ConfigData;
AccessPoint = &(ConfigData->AccessPoint);
Option = ConfigData->ControlOption;
ConfigData->TypeOfService = Tcb->Tos;
ConfigData->TimeToLive = Tcb->Ttl;
AccessPoint->UseDefaultAddress = Tcb->UseDefaultAddr;
IP4_COPY_ADDRESS (&AccessPoint->StationAddress, &Tcb->LocalEnd.Ip);
IP4_COPY_ADDRESS (&AccessPoint->SubnetMask, &Tcb->SubnetMask);
AccessPoint->StationPort = NTOHS (Tcb->LocalEnd.Port);
IP4_COPY_ADDRESS (&AccessPoint->RemoteAddress, &Tcb->RemoteEnd.Ip);
AccessPoint->RemotePort = NTOHS (Tcb->RemoteEnd.Port);
AccessPoint->ActiveFlag = (BOOLEAN) (Tcb->State != TCP_LISTEN);
if (Option != NULL) {
Option->ReceiveBufferSize = GET_RCV_BUFFSIZE (Tcb->Sk);
Option->SendBufferSize = GET_SND_BUFFSIZE (Tcb->Sk);
Option->MaxSynBackLog = GET_BACKLOG (Tcb->Sk);
Option->ConnectionTimeout = Tcb->ConnectTimeout / TCP_TICK_HZ;
Option->DataRetries = Tcb->MaxRexmit;
Option->FinTimeout = Tcb->FinWait2Timeout / TCP_TICK_HZ;
Option->TimeWaitTimeout = Tcb->TimeWaitTimeout / TCP_TICK_HZ;
Option->KeepAliveProbes = Tcb->MaxKeepAlive;
Option->KeepAliveTime = Tcb->KeepAliveIdle / TCP_TICK_HZ;
Option->KeepAliveInterval = Tcb->KeepAlivePeriod / TCP_TICK_HZ;
Option->EnableNagle = (BOOLEAN) (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_NAGLE));
Option->EnableTimeStamp = (BOOLEAN) (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_TS));
Option->EnableWindowScaling = (BOOLEAN) (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_WS));
Option->EnableSelectiveAck = FALSE;
Option->EnablePathMtuDiscovery = FALSE;
}
}
Ip = Tcb->IpInfo->Ip.Ip4;
ASSERT (Ip != NULL);
return Ip->GetModeData (Ip, Mode->Ip4ModeData, Mode->MnpConfigData, Mode->SnpModeData);
}
