From nobody Sat Apr 27 18:15:51 2024 Delivered-To: importer@patchew.org Received-SPF: none (zoho.com: 198.145.21.10 is neither permitted nor denied by domain of lists.01.org) client-ip=198.145.21.10; envelope-from=edk2-devel-bounces@lists.01.org; helo=ml01.01.org; Authentication-Results: mx.zoho.com; spf=none (zoho.com: 198.145.21.10 is neither permitted nor denied by domain of lists.01.org) smtp.mailfrom=edk2-devel-bounces@lists.01.org; Return-Path: Received: from ml01.01.org (ml01.01.org [198.145.21.10]) by mx.zohomail.com with SMTPS id 1493796342102253.45514166623536; Wed, 3 May 2017 00:25:42 -0700 (PDT) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 231C121A134A3; Wed, 3 May 2017 00:25:40 -0700 (PDT) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 53FEB21A13496 for ; Wed, 3 May 2017 00:25:39 -0700 (PDT) Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 03 May 2017 00:25:38 -0700 Received: from sfu5-mobl3.ccr.corp.intel.com ([10.239.194.96]) by orsmga002.jf.intel.com with ESMTP; 03 May 2017 00:25:37 -0700 X-Original-To: edk2-devel@lists.01.org X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.38,283,1491289200"; d="scan'208";a="81855011" From: Fu Siyuan To: edk2-devel@lists.01.org Date: Wed, 3 May 2017 15:25:32 +0800 Message-Id: <1493796332-91632-1-git-send-email-siyuan.fu@intel.com> X-Mailer: git-send-email 2.7.4.windows.1 Subject: [edk2] [Patch] MdeModulePkg: Addressing TCP Window Retraction when window scale factor is used. X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ye Ting , Wu Jiaxin MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Errors-To: edk2-devel-bounces@lists.01.org Sender: "edk2-devel" X-ZohoMail: RSF_4 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" The RFC1323 which defines the TCP window scale option has been obsoleted by= RFC7323. This patch is to follow the RFC3723 to address the TCP window retraction pr= oblem when a non-zero scale factor is used. Cc: Wu Jiaxin Cc: Andrey Tepin Cc: Ye Ting Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Fu Siyuan --- MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Misc.c | 5 +-- .../Universal/Network/Tcp4Dxe/Tcp4Output.c | 41 +++++++++++++++++-= ---- MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Proto.h | 8 ++++- 3 files changed, 43 insertions(+), 11 deletions(-) diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Misc.c b/MdeModuleP= kg/Universal/Network/Tcp4Dxe/Tcp4Misc.c index 1a7c41a..892d19b 100644 --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Misc.c +++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Misc.c @@ -1,7 +1,7 @@ /** @file Misc support routines for tcp. =20 -Copyright (c) 2005 - 2016, Intel Corporation. All rights reserved.
+Copyright (c) 2005 - 2017, Intel Corporation. All rights reserved.
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 @@ -78,7 +78,8 @@ TcpInitTcbLocal ( // First window size is never scaled // Tcb->RcvWndScale =3D 0; - + Tcb->RetxmitSeqMax =3D 0; + =20 Tcb->ProbeTimerOn =3D FALSE; } =20 diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Output.c b/MdeModul= ePkg/Universal/Network/Tcp4Dxe/Tcp4Output.c index 0eec8f0..ed71f97 100644 --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Output.c +++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Output.c @@ -1,7 +1,7 @@ /** @file TCP output process routines. =20 -Copyright (c) 2005 - 2016, Intel Corporation. All rights reserved.
+Copyright (c) 2005 - 2017, Intel Corporation. All rights reserved.
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 @@ -671,17 +671,38 @@ TcpRetransmit ( // 2. must in the current send window // 3. will not change the boundaries of queued segments. // - if (TCP_SEQ_LT (Tcb->SndWl2 + Tcb->SndWnd, Seq)) { - DEBUG ((EFI_D_WARN, "TcpRetransmit: retransmission cancelled " - "because send window too small for TCB %p\n", Tcb)); + if ((Tcb->SndWndScale !=3D 0) && + (TCP_SEQ_GT (Seq, Tcb->RetxmitSeqMax) || TCP_SEQ_GT (Tcb->SndWl2 + T= cb->SndWnd + (1 << Tcb->SndWndScale), Seq))) { + // + // Handle the Window Retraction if TCP window scale is enabled accordi= ng to RFC7323: + // On first retransmission, or if the sequence number is out of + // window by less than 2^Rcv.Wind.Shift, then do normal + // retransmission(s) without regard to the receiver window as long + // as the original segment was in window when it was sent. + // + Len =3D TCP_SUB_SEQ (Tcb->SndNxt, Seq); + DEBUG ( + (EFI_D_WARN, + "TcpRetransmit: retransmission without regard to the receiver window= for TCB %p\n", + Tcb) + ); + =20 + } else if (TCP_SEQ_GEQ (Tcb->SndWl2 + Tcb->SndWnd, Seq)) { + Len =3D TCP_SUB_SEQ (Tcb->SndWl2 + Tcb->SndWnd, Seq); + =20 + } else { + DEBUG ( + (EFI_D_WARN, + "TcpRetransmit: retransmission cancelled because send window too sma= ll for TCB %p\n", + Tcb) + ); =20 return 0; } + =20 + Len =3D MIN (Len, Tcb->SndMss); =20 - Len =3D TCP_SUB_SEQ (Tcb->SndWl2 + Tcb->SndWnd, Seq); - Len =3D MIN (Len, Tcb->SndMss); - - Nbuf =3D TcpGetSegmentSndQue (Tcb, Seq, Len); + Nbuf =3D TcpGetSegmentSndQue (Tcb, Seq, Len); if (Nbuf =3D=3D NULL) { return -1; } @@ -691,6 +712,10 @@ TcpRetransmit ( if (TcpTransmitSegment (Tcb, Nbuf) !=3D 0) { goto OnError; } + =20 + if (TCP_SEQ_GT (Seq, Tcb->RetxmitSeqMax)) { + Tcb->RetxmitSeqMax =3D Seq; + } =20 // // The retransmitted buffer may be on the SndQue, diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Proto.h b/MdeModule= Pkg/Universal/Network/Tcp4Dxe/Tcp4Proto.h index 01d6034..49d8a1d 100644 --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Proto.h +++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Proto.h @@ -1,7 +1,7 @@ /** @file Tcp Protocol header file. =20 -Copyright (c) 2005 - 2010, Intel Corporation. All rights reserved.
+Copyright (c) 2005 - 2017, Intel Corporation. All rights reserved.
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 @@ -251,6 +251,12 @@ struct _TCP_CB { UINT32 ConnectTimeout; ///< The connect establishment time o= ut =20 // + // RFC7323 + // Addressing Window Retraction for TCP Window Scale Option. + // + TCP_SEQNO RetxmitSeqMax; ///< Max Seq number in previous r= etransmission. + + // // configuration for tcp provided by user // BOOLEAN UseDefaultAddr; --=20 1.9.5.msysgit.1 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel