/**
Build the TCP option in synchronized states.
@param[in] Tcb Pointer to the TCP_CB of this TCP instance.
@param[in] Nbuf Pointer to the buffer to store the options.
@return The total length of the TCP option field.
**/
UINT16
TcpBuildOption (
IN TCP_CB *Tcb,
IN NET_BUF *Nbuf
)
{
UINT8 *Data;
UINT16 Len;
ASSERT ((Tcb != NULL) && (Nbuf != NULL) && (Nbuf->Tcp == NULL));
Len = 0;
//
// Build the Timestamp option.
//
if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_SND_TS) &&
!TCP_FLG_ON (TCPSEG_NETBUF (Nbuf)->Flag, TCP_FLG_RST)
) {
Data = NetbufAllocSpace (
Nbuf,
TCP_OPTION_TS_ALIGNED_LEN,
NET_BUF_HEAD
);
ASSERT (Data != NULL);
Len += TCP_OPTION_TS_ALIGNED_LEN;
TcpPutUint32 (Data, TCP_OPTION_TS_FAST);
TcpPutUint32 (Data + 4, mTcpTick);
TcpPutUint32 (Data + 8, Tcb->TsRecent);
}
return Len;
}
/**
Enable the keepalive timer and set the timeout value.
@param Tcb Pointer to the TCP_CB of this TCP instance.
**/
VOID
TcpSetKeepaliveTimer (
IN OUT TCP_CB *Tcb
)
{
if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_KEEPALIVE)) {
return ;
}
//
// Set the timer to KeepAliveIdle if either
// 1. the keepalive timer is off
// 2. The keepalive timer is on, but the idle
// is less than KeepAliveIdle, that means the
// connection is alive since our last probe.
//
if (!TCP_TIMER_ON (Tcb->EnabledTimer, TCP_TIMER_KEEPALIVE) ||
(Tcb->Idle < Tcb->KeepAliveIdle)) {
TcpSetTimer (Tcb, TCP_TIMER_KEEPALIVE, Tcb->KeepAliveIdle);
Tcb->KeepAliveProbes = 0;
} else {
TcpSetTimer (Tcb, TCP_TIMER_KEEPALIVE, Tcb->KeepAlivePeriod);
}
}
/**
Build the TCP option in three-way handshake.
@param[in] Tcb Pointer to the TCP_CB of this TCP instance.
@param[in] Nbuf Pointer to the buffer to store the options.
@return The total length of the TCP option field.
**/
UINT16
TcpSynBuildOption (
IN TCP_CB *Tcb,
IN NET_BUF *Nbuf
)
{
UINT8 *Data;
UINT16 Len;
ASSERT ((Tcb != NULL) && (Nbuf != NULL) && (Nbuf->Tcp == NULL));
Len = 0;
//
// Add a timestamp option if not disabled by the application
// and it is the first SYN segment, or the peer has sent
// us its timestamp.
//
if (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_TS) &&
(!TCP_FLG_ON (TCPSEG_NETBUF (Nbuf)->Flag, TCP_FLG_ACK) ||
TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_RCVD_TS))
) {
Data = NetbufAllocSpace (
Nbuf,
TCP_OPTION_TS_ALIGNED_LEN,
NET_BUF_HEAD
);
ASSERT (Data != NULL);
Len += TCP_OPTION_TS_ALIGNED_LEN;
TcpPutUint32 (Data, TCP_OPTION_TS_FAST);
TcpPutUint32 (Data + 4, mTcpTick);
TcpPutUint32 (Data + 8, 0);
}
//
// Build window scale option, only when configured
// to send WS option, and either we are doing active
// open or we have received WS option from peer.
//
if (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_WS) &&
(!TCP_FLG_ON (TCPSEG_NETBUF (Nbuf)->Flag, TCP_FLG_ACK) ||
TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_RCVD_WS))
) {
Data = NetbufAllocSpace (
Nbuf,
TCP_OPTION_WS_ALIGNED_LEN,
NET_BUF_HEAD
);
ASSERT (Data != NULL);
Len += TCP_OPTION_WS_ALIGNED_LEN;
TcpPutUint32 (Data, TCP_OPTION_WS_FAST | TcpComputeScale (Tcb));
}
//
// Build the MSS option.
//
Data = NetbufAllocSpace (Nbuf, TCP_OPTION_MSS_LEN, 1);
ASSERT (Data != NULL);
Len += TCP_OPTION_MSS_LEN;
TcpPutUint32 (Data, TCP_OPTION_MSS_FAST | Tcb->RcvMss);
return Len;
}
/**
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);
}