From owner-freebsd-net@freebsd.org Sat Dec 22 00:06:09 2018 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id ABBDA1338774; Sat, 22 Dec 2018 00:06:08 +0000 (UTC) (envelope-from Richard.Scheffenegger@netapp.com) Received: from NAM05-CO1-obe.outbound.protection.outlook.com (mail-co1nam05on0624.outbound.protection.outlook.com [IPv6:2a01:111:f400:fe50::624]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (Client CN "mail.protection.outlook.com", Issuer "GlobalSign Organization Validation CA - SHA256 - G3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 6966B8A421; Sat, 22 Dec 2018 00:06:06 +0000 (UTC) (envelope-from Richard.Scheffenegger@netapp.com) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=netapp.onmicrosoft.com; s=selector1-netapp-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=G0moQyt8tmjm++7N3qo27OhQlbuPEDyqn3rB9pixfCU=; b=J+JcWTnvoaxfK/w076xw4/WXj6LCu/Pn3ePN3Xvp3Rhnr+pzXEgItCGBt7WapF0YvbDRgSJ+lw4PnnIPpgfLpgDYFXRRT1CeTWljSSUWK9cglFmOHU0LoA1THWvd/vu2ozRLSE0imyxkDYS75vKXxAyzoqdqEHnHsvwjnNJnKvM= Received: from SN4PR0601MB3728.namprd06.prod.outlook.com (10.167.142.14) by SN4PR0601MB3774.namprd06.prod.outlook.com (10.167.142.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1425.22; Sat, 22 Dec 2018 00:06:03 +0000 Received: from SN4PR0601MB3728.namprd06.prod.outlook.com ([fe80::8d1a:8d3a:30a:d011]) by SN4PR0601MB3728.namprd06.prod.outlook.com ([fe80::8d1a:8d3a:30a:d011%4]) with mapi id 15.20.1446.022; Sat, 22 Dec 2018 00:06:03 +0000 From: "Scheffenegger, Richard" To: "freebsd-transport@freebsd.org" , "freebsd-net@freebsd.org" Subject: RFC6675 Thread-Topic: RFC6675 Thread-Index: AdSCTGIZ5XHylIM3SDapy9vpX2YRCgXPDzGQ Date: Sat, 22 Dec 2018 00:06:03 +0000 Message-ID: References: In-Reply-To: Accept-Language: de-AT, en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-dg-ref: PG1ldGE+PGF0IG5tPSJyZmM2Njc1LnBuZyIgcD0iYzpcdXNlcnNcc3JpY2hhcmRcZG9jdW1lbnRzXG5ldGFwcFxmcmVlYnNkXHJmYzY2NzUucG5nIiBzej0iNDQ0ODYiIHQ9IjEzMTg5OTEwNDkyNTYzODcwMCIgaD0icVYvd1FEeEJZZ2FOWmFSanI2UXlaZmZCeFU0PSIgaWQ9IiIgYmw9IjAiIGJvPSIwIi8+PGF0IG5tPSJyZmMzNTE3LnBuZyIgcD0iYzpcdXNlcnNcc3JpY2hhcmRcZG9jdW1lbnRzXG5ldGFwcFxmcmVlYnNkXHJmYzM1MTcucG5nIiBzej0iMzI2MDQiIHQ9IjEzMTg5OTEwNDkyNjMyMjE1OCIgaD0iWnFXaDlhYTdrZGluOUlkeC8yTThYV0REL0Q4PSIgaWQ9IiIgYmw9IjAiIGJvPSIwIi8+PGF0IG5tPSJib2R5LnR4dCIgcD0iYzpcdXNlcnNcc3JpY2hhcmRcYXBwZGF0YVxyb2FtaW5nXDA5ZDg0OWI2LTMyZDMtNGE0MC04NWVlLTZiODRiYTI5ZTM1Ylxtc2dzXG1zZy01Y2MzZjRhMC0wNTdkLTExZTktYjVlNi0wMDE5ZDJlNGVjZDdcYW1lLXRlc3RcNWNjM2Y0YTItMDU3ZC0xMWU5LWI1ZTYtMDAxOWQyZTRlY2Q3Ym9keS50eHQiIHN6PSIxMDc5IiB0PSIxMzE4OTkxMDc2MDczMTg4MDkiIGg9ImorUTNGd282UlBrN3RkL2FuUjY3S0tvWEVJMD0iIGlkPSIiIGJsPSIwIiBibz0iMSIvPjwvbWV0YT4= x-dg-rorf: x-originating-ip: [213.143.121.76] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1; SN4PR0601MB3774; 6:L+KKM7z1+7jQ2kKW6AN1ZSjZh9CXgsTJo/m5Y2F7ctMvTkPRdjIfjk59ShcqRAQYoHKrGb+erg/OmzT3FDAfSLS7iYEr40F9m4h+KNVxQ26+ve/Z7cO1PMpCE4PKFeE9LBuTn9W03q3kq3ntwNAwmYuHnTx0uM4lIzbky6rU6h+LHHfaGZoc4wbhzZEwgp6moybJZWK2AzF2yCR/OTueNL3YeaDIBSedieJv0+FQRPZLwYGeogHM9mo5tCK3gQyDgsf8LFX3Apl5s9+uYDhuNuynv9w7fBHtyntl20He1Hok1izo99vXZ/BTC6f6G3VUomGWrKTp70rZG/okRJPRchtRkTtkvdACXz0ZRCUOKcXyxT3IVtJnrUVHl43D71NSK9Qn+SdJDQDYZistKMKWidaq9iNSqTKoWpUSU3dylP4AKqJM4f6XHDb4iaUoSOB8VnEZS3tAUhVl5/dBjhYdwQ==; 5:ZdgW0pQPgKqpFxWAmWqDvJDBs7S12dnQx8RliWBWsCX9+Oxk8Kb0Px8TC6AcpequxOLjV6hY3B8v5s1nGolfFVQ5+5lmdoeeg3KhSLlysz25dB+R5FYUOHkd4Bse/QLPvJ6Djtp+28DbT/8N8HYtBRW3hmewqJitxlYd+2c4flA=; 7:qebvU/6KYmXn7CTkMHmet3ihjNLsIt8wEcdXT6+UEODE3OIeOjKbl8r6ua3RN49ajZYIsNH07+tAs/Nd8D2Po6kDc32tQXjAE7P1TmsN52QdPz1gofSM1V6tnXywvUd87xz04IqxW6aPBuUmMj11JQ== x-ms-exchange-antispam-srfa-diagnostics: SOS; x-ms-office365-filtering-correlation-id: bf461164-bdb1-49b7-0c7f-08d667a1431b x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600074)(711020)(2017052603328)(49563074)(7193020); SRVR:SN4PR0601MB3774; x-ms-traffictypediagnostic: SN4PR0601MB3774: x-microsoft-antispam-prvs: x-ms-exchange-senderadcheck: 1 x-exchange-antispam-report-cfa-test: BCL:0; PCL:0; RULEID:(8211001083)(3230021)(999002)(5005026)(102415395)(6040522)(2401047)(8121501046)(10201501046)(93006095)(93001095)(3231475)(944501520)(4983020)(52105112)(3002001)(6055026)(149066)(150057)(6041310)(20161123564045)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123558120)(20161123562045)(20161123560045)(201708071742011)(7699051)(76991095); SRVR:SN4PR0601MB3774; BCL:0; PCL:0; RULEID:; SRVR:SN4PR0601MB3774; x-forefront-prvs: 089473E5FE x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(39860400002)(366004)(376002)(136003)(396003)(346002)(199004)(189003)(450100002)(7696005)(68736007)(7116003)(446003)(99286004)(110136005)(476003)(74316002)(8936002)(26005)(11346002)(99936001)(316002)(186003)(102836004)(76176011)(72206003)(53936002)(2906002)(5660300001)(55016002)(486006)(33656002)(7736002)(256004)(6116002)(2501003)(66066001)(14444005)(97736004)(6506007)(9686003)(3846002)(305945005)(106356001)(105586002)(71200400001)(71190400001)(25786009)(86362001)(81166006)(6436002)(478600001)(81156014)(8676002)(14454004); DIR:OUT; SFP:1101; SCL:1; SRVR:SN4PR0601MB3774; H:SN4PR0601MB3728.namprd06.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; received-spf: None (protection.outlook.com: netapp.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: +Lj4eCl4gzhoJXbCpUlwni5PzYpIop8WPvFoa0Ye9oHbIWYd7BoEBR+Z9Zv/Pky53ipigYPyh0U/oXs2pLjX1XfoZJiJRIe5b8X7jyMmZAS1+kxNRAfYV/Zvg5LcJQ5b1VsFmmqpDx2lhZNkyB8zwZ38fHS4r+gPmLlB+9A1bDuWMPmM2XS1lAbqm9OQRbaMOxTlR3M1/Z0gNc+mV+nJ5TvQN3ir+Qx73vBfhp51/8fM3r+Oe4UC1NthvE2S7N3H4xSSukSzk1QE4at/cRUOjrgD2qDdijp7bBsy+LJxSYTZVDFjMLarIbMIBTgbMwkQ spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM MIME-Version: 1.0 X-OriginatorOrg: netapp.com X-MS-Exchange-CrossTenant-Network-Message-Id: bf461164-bdb1-49b7-0c7f-08d667a1431b X-MS-Exchange-CrossTenant-originalarrivaltime: 22 Dec 2018 00:06:03.0984 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 4b0911a0-929b-4715-944b-c03745165b3a X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN4PR0601MB3774 X-Rspamd-Queue-Id: 6966B8A421 X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=netapp.onmicrosoft.com header.s=selector1-netapp-com header.b=J+JcWTnv; spf=pass (mx1.freebsd.org: domain of Richard.Scheffenegger@netapp.com designates 2a01:111:f400:fe50::624 as permitted sender) smtp.mailfrom=Richard.Scheffenegger@netapp.com X-Spamd-Result: default: False [-3.46 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.98)[-0.976,0]; R_DKIM_ALLOW(-0.20)[netapp.onmicrosoft.com:s=selector1-netapp-com]; HAS_XOIP(0.00)[]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2a01:111:f400::/48]; TO_MATCH_ENVRCPT_ALL(0.00)[]; HAS_ATTACHMENT(0.00)[]; MIME_GOOD(-0.10)[multipart/mixed,text/plain]; DMARC_NA(0.00)[netapp.com]; NEURAL_HAM_LONG(-0.94)[-0.939,0]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[netapp.onmicrosoft.com:+]; RCPT_COUNT_TWO(0.00)[2]; SUBJ_ALL_CAPS(0.53)[7]; TO_DN_EQ_ADDR_ALL(0.00)[]; MX_GOOD(-0.01)[mx63.netapp.com,mx61.netapp.com,mx142.netapp.com,mx1.netapp.iphmx.com,mx144.netapp.com,mx2.netapp.iphmx.com,mx141.netapp.com,mx65.netapp.com,mx143.netapp.com,mx62.netapp.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:8075, ipnet:2a01:111:f000::/36, country:US]; IP_SCORE(-0.90)[ipnet: 2a01:111:f000::/36(-2.36), asn: 8075(-2.04), country: US(-0.08)]; NEURAL_HAM_SHORT(-0.66)[-0.665,0] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.29 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 22 Dec 2018 00:06:09 -0000 For those inclined, I have a working patch for full RFC6675 support now (ne= ed to validate pipe and behavior in various scenarios still): a) enters Loss Recovery on either Nth dupack, or when more than (N-1)*MSS b= ytes are sacked (the latter relevant for ack thinning) b) a cumulative ack below snd_max, while snd_max =3D=3D recovery_point (app= lication limited) no longer requires a lengthy RTO and slow start to recove= r from. Instead, the Rescue Retransmission mechanism is implemented. c) proper accounting for delivered_data and sacked_bytes in the single-pass= update of the scoreboard. These variables enable further mechanisms like P= roportional Rate Reduction. Also, this fixes potential exploits by maliciou= s clients, and support thin IoT clients that can store data to the right of= rcv_ack, but not keep state for a full RFC3517 compliant scoreboard. I certainly need reviewers, if you are interested please let me know so tha= t I can sign you in for it. Also, further testing would be required. Best regards, Richard