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The patch acknowledges the TCP zero window probe message, either the format with 1 byte new data, or no new data. It also increases exponentially the interval between successive probes when performing TCP zero window probe.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10831 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
tye1
2010-08-27 07:57:45 +00:00
parent 8730386e6d
commit ac8cca2a4d
5 changed files with 24 additions and 14 deletions
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17
MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Input.c
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@@ -1,7 +1,7 @@
/** @file
TCP input process routines.
Copyright (c) 2005 - 2009, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2005 - 2010, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -33,7 +33,7 @@ TcpSeqAcceptable (
)
{
return (TCP_SEQ_LEQ (Tcb->RcvWl2, Seg->End) &&
TCP_SEQ_LEQ (Seg->Seq, Tcb->RcvWl2 + Tcb->RcvWnd));
TCP_SEQ_LT (Seg->Seq, Tcb->RcvWl2 + Tcb->RcvWnd));
}
@@ -925,6 +925,14 @@ TcpInput (
// Process segment in SYN_RCVD or TCP_CONNECTED states
//
//
// Clear probe timer since the RecvWindow is opened.
//
if (Tcb->ProbeTimerOn && (Seg->Wnd != 0)) {
TcpClearTimer (Tcb, TCP_TIMER_PROBE);
Tcb->ProbeTimerOn = FALSE;
}
//
// First step: Check whether SEG.SEQ is acceptable
//
@@ -1281,11 +1289,6 @@ StepSix:
Tcb->Idle = 0;
TcpSetKeepaliveTimer (Tcb);
if (TCP_TIMER_ON (Tcb->EnabledTimer, TCP_TIMER_PROBE)) {
TcpClearTimer (Tcb, TCP_TIMER_PROBE);
}
if (TCP_FLG_ON (Seg->Flag, TCP_FLG_URG) &&
!TCP_FIN_RCVD (Tcb->State)) {