/** @file\r
+ TCP output process routines.\r
\r
-Copyright (c) 2005 - 2006, Intel Corporation\r
-All rights reserved. This program and the accompanying materials\r
+Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>\r
+This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution. The full text of the license may be found at\r
-http://opensource.org/licenses/bsd-license.php\r
+http://opensource.org/licenses/bsd-license.php<BR>\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
-Module Name:\r
-\r
- Tcp4Output.c\r
-\r
-Abstract:\r
-\r
- TCP output process routines.\r
-\r
-\r
**/\r
\r
#include "Tcp4Main.h"\r
UINT32 OldWin;\r
\r
Sk = Tcb->Sk;\r
- ASSERT (Sk);\r
+ ASSERT (Sk != NULL);\r
\r
OldWin = TcpRcvWinOld (Tcb);\r
\r
\r
\r
/**\r
- Compute the value to fill in the window size field\r
- of the outgoing segment.\r
+ Compute the value to fill in the window size field of the outgoing segment.\r
\r
@param Tcb Pointer to the TCP_CB of this TCP instance.\r
@param Syn The flag to indicate whether the outgoing segment is a SYN\r
**/\r
UINT16\r
TcpComputeWnd (\r
- IN TCP_CB *Tcb,\r
- IN BOOLEAN Syn\r
+ IN OUT TCP_CB *Tcb,\r
+ IN BOOLEAN Syn\r
)\r
{\r
UINT32 Wnd;\r
UINT32 Limit;\r
\r
Sk = Tcb->Sk;\r
- ASSERT (Sk);\r
+ ASSERT (Sk != NULL);\r
\r
//\r
// TCP should NOT send data beyond the send window\r
Tcb)\r
);\r
\r
- TcpSetProbeTimer (Tcb);\r
+ if (!Tcb->ProbeTimerOn) {\r
+ TcpSetProbeTimer (Tcb);\r
+ }\r
}\r
\r
return 0;\r
\r
\r
/**\r
- Build the TCP header of the TCP segment and transmit the\r
- segment by IP.\r
+ Build the TCP header of the TCP segment and transmit the segment by IP.\r
\r
@param Tcb Pointer to the TCP_CB of this TCP instance.\r
@param Nbuf Pointer to the buffer containing the segment to be sent out.\r
**/\r
INTN\r
TcpTransmitSegment (\r
- IN TCP_CB *Tcb,\r
- IN NET_BUF *Nbuf\r
+ IN OUT TCP_CB *Tcb,\r
+ IN NET_BUF *Nbuf\r
)\r
{\r
UINT16 Len;\r
BOOLEAN Syn;\r
UINT32 DataLen;\r
\r
- ASSERT (Nbuf && (Nbuf->Tcp == NULL) && TcpVerifySegment (Nbuf));\r
+ ASSERT ((Nbuf != NULL) && (Nbuf->Tcp == NULL) && (TcpVerifySegment (Nbuf) != 0));\r
\r
DataLen = Nbuf->TotalSize;\r
\r
INT32 Offset;\r
INT32 CopyLen;\r
\r
- ASSERT (Tcb && TCP_SEQ_LEQ (Seq, Tcb->SndNxt) && (Len > 0));\r
+ ASSERT ((Tcb != NULL) && TCP_SEQ_LEQ (Seq, Tcb->SndNxt) && (Len > 0));\r
\r
//\r
// Find the segment that contains the Seq.\r
}\r
}\r
\r
- ASSERT (Cur != Head);\r
+ ASSERT (Cur != Head);\r
+ ASSERT (Node != NULL);\r
+ ASSERT (Seg != NULL);\r
\r
//\r
// Return the buffer if it can be returned without\r
\r
//\r
// If SYN is set and out of the range, clear the flag.\r
- // Becuase the sequence of the first byte is SEG.SEQ+1,\r
+ // Because the sequence of the first byte is SEG.SEQ+1,\r
// adjust Offset by -1. If SYN is in the range, copy\r
// one byte less.\r
//\r
//\r
if (CopyLen != 0) {\r
Data = NetbufAllocSpace (Nbuf, CopyLen, NET_BUF_TAIL);\r
- ASSERT (Data);\r
+ ASSERT (Data != NULL);\r
\r
if ((INT32) NetbufCopy (Node, Offset, CopyLen, Data) != CopyLen) {\r
goto OnError;\r
UINT8 *Data;\r
UINT32 DataGet;\r
\r
- ASSERT (Tcb && Tcb->Sk);\r
+ ASSERT ((Tcb != NULL) && (Tcb->Sk != NULL));\r
\r
Nbuf = NetbufAlloc (Len + TCP_MAX_HEAD);\r
\r
// copy data to the segment.\r
//\r
Data = NetbufAllocSpace (Nbuf, Len, NET_BUF_TAIL);\r
- ASSERT (Data);\r
+ ASSERT (Data != NULL);\r
\r
DataGet = SockGetDataToSend (Tcb->Sk, 0, Len, Data);\r
}\r
{\r
NET_BUF *Nbuf;\r
\r
- ASSERT (Tcb);\r
+ ASSERT (Tcb != NULL);\r
\r
//\r
// Compare the SndNxt with the max sequence number sent.\r
Nbuf = TcpGetSegmentSock (Tcb, Seq, Len);\r
}\r
\r
- ASSERT (TcpVerifySegment (Nbuf));\r
+ ASSERT (TcpVerifySegment (Nbuf) != 0);\r
return Nbuf;\r
}\r
\r
// 2. must in the current send window\r
// 3. will not change the boundaries of queued segments.\r
//\r
- if (TCP_SEQ_LT (Tcb->SndWl2 + Tcb->SndWnd, Seq)) {\r
- DEBUG ((EFI_D_WARN, "TcpRetransmit: retransmission cancelled "\r
- "because send window too small for TCB %p\n", Tcb));\r
+\r
+ //\r
+ // Handle the Window Retraction if TCP window scale is enabled according to RFC7323:\r
+ // On first retransmission, or if the sequence number is out of\r
+ // window by less than 2^Rcv.Wind.Shift, then do normal\r
+ // retransmission(s) without regard to the receiver window as long\r
+ // as the original segment was in window when it was sent.\r
+ //\r
+ if ((Tcb->SndWndScale != 0) &&\r
+ (TCP_SEQ_GT (Seq, Tcb->RetxmitSeqMax) || TCP_SEQ_BETWEEN (Tcb->SndWl2 + Tcb->SndWnd, Seq, Tcb->SndWl2 + Tcb->SndWnd + (1 << Tcb->SndWndScale)))) {\r
+ Len = TCP_SUB_SEQ (Tcb->SndNxt, Seq);\r
+ DEBUG (\r
+ (EFI_D_WARN,\r
+ "TcpRetransmit: retransmission without regard to the receiver window for TCB %p\n",\r
+ Tcb)\r
+ );\r
+\r
+ } else if (TCP_SEQ_GEQ (Tcb->SndWl2 + Tcb->SndWnd, Seq)) {\r
+ Len = TCP_SUB_SEQ (Tcb->SndWl2 + Tcb->SndWnd, Seq);\r
+\r
+ } else {\r
+ DEBUG (\r
+ (EFI_D_WARN,\r
+ "TcpRetransmit: retransmission cancelled because send window too small for TCB %p\n",\r
+ Tcb)\r
+ );\r
\r
return 0;\r
}\r
\r
- Len = TCP_SUB_SEQ (Tcb->SndWl2 + Tcb->SndWnd, Seq);\r
- Len = MIN (Len, Tcb->SndMss);\r
+ Len = MIN (Len, Tcb->SndMss);\r
\r
- Nbuf = TcpGetSegmentSndQue (Tcb, Seq, Len);\r
+ Nbuf = TcpGetSegmentSndQue (Tcb, Seq, Len);\r
if (Nbuf == NULL) {\r
return -1;\r
}\r
\r
- ASSERT (TcpVerifySegment (Nbuf));\r
+ ASSERT (TcpVerifySegment (Nbuf) != 0);\r
\r
if (TcpTransmitSegment (Tcb, Nbuf) != 0) {\r
goto OnError;\r
}\r
\r
+ if (TCP_SEQ_GT (Seq, Tcb->RetxmitSeqMax)) {\r
+ Tcb->RetxmitSeqMax = Seq;\r
+ }\r
+\r
//\r
// The retransmitted buffer may be on the SndQue,\r
// trim TCP head because all the buffer on SndQue\r
// are headless.\r
//\r
- ASSERT (Nbuf->Tcp);\r
+ ASSERT (Nbuf->Tcp != NULL);\r
NetbufTrim (Nbuf, (Nbuf->Tcp->HeadLen << 2), NET_BUF_HEAD);\r
Nbuf->Tcp = NULL;\r
\r
**/\r
INTN\r
TcpToSendData (\r
- IN TCP_CB *Tcb,\r
- IN INTN Force\r
+ IN OUT TCP_CB *Tcb,\r
+ IN INTN Force\r
)\r
{\r
UINT32 Len;\r
TCP_SEQNO Seq;\r
TCP_SEQNO End;\r
\r
- ASSERT (Tcb && Tcb->Sk && (Tcb->State != TCP_LISTEN));\r
+ ASSERT ((Tcb != NULL) && (Tcb->Sk != NULL) && (Tcb->State != TCP_LISTEN));\r
\r
Sent = 0;\r
\r
Len = TcpDataToSend (Tcb, Force);\r
Seq = Tcb->SndNxt;\r
\r
+ ASSERT ((Tcb->State) < (ARRAY_SIZE (mTcpOutFlag)));\r
Flag = mTcpOutFlag[Tcb->State];\r
\r
if ((Flag & TCP_FLG_SYN) != 0) {\r
// only send a segment without data if SYN or\r
// FIN is set.\r
//\r
- if ((Len == 0) && \r
+ if ((Len == 0) &&\r
((Flag & (TCP_FLG_SYN | TCP_FLG_FIN)) == 0)) {\r
return Sent;\r
}\r
//\r
if ((TcpGetMaxSndNxt (Tcb) == Tcb->SndNxt) &&\r
(GET_SND_DATASIZE (Tcb->Sk) == 0) &&\r
- TCP_SEQ_LT (End + 1, Tcb->SndWnd + Tcb->SndWl2)\r
- ) {\r
-\r
- DEBUG ((EFI_D_INFO, "TcpToSendData: send FIN "\r
- "to peer for TCB %p in state %d\n", Tcb, Tcb->State));\r
+ TCP_SEQ_LT (End + 1, Tcb->SndWnd + Tcb->SndWl2)) {\r
+\r
+ DEBUG (\r
+ (EFI_D_NET,\r
+ "TcpToSendData: send FIN "\r
+ "to peer for TCB %p in state %s\n",\r
+ Tcb,\r
+ mTcpStateName[Tcb->State])\r
+ );\r
\r
End++;\r
} else {\r
Seg->End = End;\r
Seg->Flag = Flag;\r
\r
- ASSERT (TcpVerifySegment (Nbuf));\r
- ASSERT (TcpCheckSndQue (&Tcb->SndQue));\r
+ ASSERT (TcpVerifySegment (Nbuf) != 0);\r
+ ASSERT (TcpCheckSndQue (&Tcb->SndQue) != 0);\r
\r
//\r
// don't send an empty segment here.\r
}\r
\r
if (TcpTransmitSegment (Tcb, Nbuf) != 0) {\r
- //\r
- // TODO: double check this\r
- //\r
NetbufTrim (Nbuf, (Nbuf->Tcp->HeadLen << 2), NET_BUF_HEAD);\r
Nbuf->Tcp = NULL;\r
\r
//\r
// All the buffer in the SndQue is headless\r
//\r
- ASSERT (Nbuf->Tcp);\r
+ ASSERT (Nbuf->Tcp != NULL);\r
\r
NetbufTrim (Nbuf, (Nbuf->Tcp->HeadLen << 2), NET_BUF_HEAD);\r
Nbuf->Tcp = NULL;\r
if ((Tcb->CongestState == TCP_CONGEST_OPEN) &&\r
!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_RTT_ON)) {\r
\r
- DEBUG ((EFI_D_INFO, "TcpToSendData: set RTT measure "\r
+ DEBUG ((EFI_D_NET, "TcpToSendData: set RTT measure "\r
"sequence %d for TCB %p\n", Seq, Tcb));\r
\r
TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_RTT_ON);\r
\r
@param Tcb Pointer to the TCP_CB of this TCP instance.\r
\r
- @return None.\r
-\r
**/\r
VOID\r
TcpSendAck (\r
- IN TCP_CB *Tcb\r
+ IN OUT TCP_CB *Tcb\r
)\r
{\r
NET_BUF *Nbuf;\r
\r
\r
/**\r
- Send a zero probe segment. It can be used by keepalive\r
- and zero window probe.\r
+ Send a zero probe segment. It can be used by keepalive and zero window probe.\r
\r
@param Tcb Pointer to the TCP_CB of this TCP instance.\r
\r
**/\r
INTN\r
TcpSendZeroProbe (\r
- IN TCP_CB *Tcb\r
+ IN OUT TCP_CB *Tcb\r
)\r
{\r
NET_BUF *Nbuf;\r
\r
@param Tcb Pointer to the TCP_CB of this TCP instance.\r
\r
- @return None.\r
-\r
**/\r
VOID\r
TcpToSendAck (\r
- IN TCP_CB *Tcb\r
+ IN OUT TCP_CB *Tcb\r
)\r
{\r
UINT32 TcpNow;\r
//\r
if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_ACK_NOW) ||\r
(Tcb->DelayedAck >= 1) ||\r
- (TcpNow > TcpRcvWinOld (Tcb))\r
- ) {\r
+ (TcpNow > TcpRcvWinOld (Tcb))) {\r
TcpSendAck (Tcb);\r
return;\r
}\r
\r
- DEBUG ((EFI_D_INFO, "TcpToSendAck: scheduled a delayed"\r
+ DEBUG ((EFI_D_NET, "TcpToSendAck: scheduled a delayed"\r
" ACK for TCB %p\n", Tcb));\r
\r
//\r
//\r
// Don't respond to a Reset with reset\r
//\r
- if (Head->Flag & TCP_FLG_RST) {\r
+ if ((Head->Flag & TCP_FLG_RST) != 0) {\r
return 0;\r
}\r
\r
\r
Nhead->SrcPort = Head->DstPort;\r
Nhead->DstPort = Head->SrcPort;\r
- Nhead->HeadLen = (sizeof (TCP_HEAD) >> 2);\r
+ Nhead->HeadLen = (UINT8) (sizeof (TCP_HEAD) >> 2);\r
Nhead->Res = 0;\r
Nhead->Wnd = HTONS (0xFFFF);\r
Nhead->Checksum = 0;\r
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