@param[in] Left The sequence number of the window's left edge.\r
@param[in] Right The sequence number of the window's right edge.\r
\r
+ @retval 0 The segment is broken.\r
+ @retval 1 The segment is in good shape.\r
+\r
**/\r
-VOID\r
+INTN\r
TcpTrimSegment (\r
IN NET_BUF *Nbuf,\r
IN TCP_SEQNO Left,\r
\r
Seg->Seq = Seg->End;\r
NetbufTrim (Nbuf, Nbuf->TotalSize, NET_BUF_HEAD);\r
- return;\r
+ return 1;\r
}\r
\r
//\r
}\r
}\r
\r
- ASSERT (TcpVerifySegment (Nbuf) != 0);\r
+ return TcpVerifySegment (Nbuf);\r
}\r
\r
/**\r
@param[in] Tcb Pointer to the TCP_CB of this TCP instance.\r
@param[in] Nbuf Pointer to the NET_BUF containing the received tcp segment.\r
\r
+ @retval 0 The segment is broken.\r
+ @retval 1 The segment is in good shape.\r
+\r
**/\r
-VOID\r
+INTN\r
TcpTrimInWnd (\r
IN TCP_CB *Tcb,\r
IN NET_BUF *Nbuf\r
)\r
{\r
- TcpTrimSegment (Nbuf, Tcb->RcvNxt, Tcb->RcvWl2 + Tcb->RcvWnd);\r
+ return TcpTrimSegment (Nbuf, Tcb->RcvNxt, Tcb->RcvWl2 + Tcb->RcvWnd);\r
}\r
\r
/**\r
Nbuf = NET_LIST_USER_STRUCT (Entry, NET_BUF, List);\r
Seg = TCPSEG_NETBUF (Nbuf);\r
\r
- ASSERT (TcpVerifySegment (Nbuf) != 0);\r
+ if (TcpVerifySegment (Nbuf) == 0) {\r
+ DEBUG (\r
+ (EFI_D_ERROR,\r
+ "TcpToSendData: discard a broken segment for TCB %p\n",\r
+ Tcb)\r
+ );\r
+ NetbufFree (Nbuf);\r
+ return -1;\r
+ }\r
+ \r
ASSERT (Nbuf->Tcp == NULL);\r
\r
if (TCP_SEQ_GT (Seg->Seq, Seq)) {\r
@param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r
@param[in] Nbuf Pointer to the buffer containing the data to be queued.\r
\r
+ @retval 0 An error condition occurred.\r
+ @retval 1 No error occurred to queue data.\r
+\r
**/\r
-VOID\r
+INTN\r
TcpQueueData (\r
IN OUT TCP_CB *Tcb,\r
IN NET_BUF *Nbuf\r
if (IsListEmpty (Head)) {\r
\r
InsertTailList (Head, &Nbuf->List);\r
- return;\r
+ return 1;\r
}\r
\r
//\r
if (TCP_SEQ_LT (Seg->Seq, TCPSEG_NETBUF (Node)->End)) {\r
\r
if (TCP_SEQ_LEQ (Seg->End, TCPSEG_NETBUF (Node)->End)) {\r
-\r
- NetbufFree (Nbuf);\r
- return;\r
+ return 1;\r
}\r
\r
- TcpTrimSegment (Nbuf, TCPSEG_NETBUF (Node)->End, Seg->End);\r
+ if (TcpTrimSegment (Nbuf, TCPSEG_NETBUF (Node)->End, Seg->End) == 0) {\r
+ return 0;\r
+ }\r
}\r
}\r
\r
if (TCP_SEQ_LEQ (TCPSEG_NETBUF (Node)->Seq, Seg->Seq)) {\r
\r
RemoveEntryList (&Nbuf->List);\r
- NetbufFree (Nbuf);\r
- return;\r
+ return 1;\r
}\r
\r
- TcpTrimSegment (Nbuf, Seg->Seq, TCPSEG_NETBUF (Node)->Seq);\r
+ if (TcpTrimSegment (Nbuf, Seg->Seq, TCPSEG_NETBUF (Node)->Seq) == 0) {\r
+ RemoveEntryList (&Nbuf->List);\r
+ return 0;\r
+ }\r
break;\r
}\r
\r
Cur = Cur->ForwardLink;\r
}\r
+\r
+ return 1;\r
}\r
\r
\r
@param[in] Tcb Pointer to the TCP_CB of this TCP instance.\r
@param[in] Ack The acknowledge seuqence number of the received segment.\r
\r
+ @retval 0 An error condition occurred.\r
+ @retval 1 No error occurred.\r
+\r
**/\r
-VOID\r
+INTN\r
TcpAdjustSndQue (\r
IN TCP_CB *Tcb,\r
IN TCP_SEQNO Ack\r
continue;\r
}\r
\r
- TcpTrimSegment (Node, Ack, Seg->End);\r
- break;\r
+ return TcpTrimSegment (Node, Ack, Seg->End);\r
}\r
+\r
+ return 1;\r
}\r
\r
/**\r
\r
TcpSetState (Tcb, TCP_SYN_RCVD);\r
TcpSetTimer (Tcb, TCP_TIMER_CONNECT, Tcb->ConnectTimeout);\r
- TcpTrimInWnd (Tcb, Nbuf);\r
+ if (TcpTrimInWnd (Tcb, Nbuf) == 0) {\r
+ DEBUG (\r
+ (EFI_D_ERROR,\r
+ "TcpInput: discard a broken segment for TCB %p\n",\r
+ Tcb)\r
+ );\r
+\r
+ goto DISCARD;\r
+ }\r
\r
goto StepSix;\r
}\r
TCP_CLEAR_FLG (Tcb->CtrlFlag, TCP_CTRL_RTT_ON);\r
}\r
\r
- TcpTrimInWnd (Tcb, Nbuf);\r
+ if (TcpTrimInWnd (Tcb, Nbuf) == 0) {\r
+ DEBUG (\r
+ (EFI_D_ERROR,\r
+ "TcpInput: discard a broken segment for TCB %p\n",\r
+ Tcb)\r
+ );\r
+\r
+ goto DISCARD;\r
+ }\r
\r
TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_ACK_NOW);\r
\r
TcpSetState (Tcb, TCP_SYN_RCVD);\r
\r
ASSERT (Tcb->SndNxt == Tcb->Iss + 1);\r
- TcpAdjustSndQue (Tcb, Tcb->SndNxt);\r
\r
- TcpTrimInWnd (Tcb, Nbuf);\r
+ if (TcpAdjustSndQue (Tcb, Tcb->SndNxt) == 0 || TcpTrimInWnd (Tcb, Nbuf) == 0) {\r
+ DEBUG (\r
+ (EFI_D_ERROR,\r
+ "TcpInput: discard a broken segment for TCB %p\n",\r
+ Tcb)\r
+ );\r
+\r
+ goto DISCARD;\r
+ }\r
\r
DEBUG (\r
(EFI_D_WARN,\r
//\r
// Trim the data and flags.\r
//\r
- TcpTrimInWnd (Tcb, Nbuf);\r
+ if (TcpTrimInWnd (Tcb, Nbuf) == 0) {\r
+ DEBUG (\r
+ (EFI_D_ERROR,\r
+ "TcpInput: discard a broken segment for TCB %p\n",\r
+ Tcb)\r
+ );\r
+\r
+ goto DISCARD;\r
+ }\r
\r
//\r
// Third step: Check security and precedence, Ignored\r
\r
if (TCP_SEQ_GT (Seg->Ack, Tcb->SndUna)) {\r
\r
- TcpAdjustSndQue (Tcb, Seg->Ack);\r
+ if (TcpAdjustSndQue (Tcb, Seg->Ack) == 0) {\r
+ DEBUG (\r
+ (EFI_D_ERROR,\r
+ "TcpInput: discard a broken segment for TCB %p\n",\r
+ Tcb)\r
+ );\r
+\r
+ goto DISCARD;\r
+ }\r
+ \r
Tcb->SndUna = Seg->Ack;\r
\r
if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_SND_URG) &&\r
goto RESET_THEN_DROP;\r
}\r
\r
- TcpQueueData (Tcb, Nbuf);\r
+ if (TcpQueueData (Tcb, Nbuf) == 0) {\r
+ DEBUG (\r
+ (EFI_D_ERROR,\r
+ "TcpInput: discard a broken segment for TCB %p\n",\r
+ Tcb)\r
+ );\r
+\r
+ goto DISCARD;\r
+ }\r
+ \r
if (TcpDeliverData (Tcb) == -1) {\r
goto RESET_THEN_DROP;\r
}\r