From owner-freebsd-net@freebsd.org Tue Sep 22 12:57:29 2020 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id D5D543E89BF for ; Tue, 22 Sep 2020 12:57:29 +0000 (UTC) (envelope-from bu7cher@yandex.ru) Received: from forward102o.mail.yandex.net (forward102o.mail.yandex.net [IPv6:2a02:6b8:0:1a2d::602]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4BwhD83tMSz3ybn for ; Tue, 22 Sep 2020 12:57:28 +0000 (UTC) (envelope-from bu7cher@yandex.ru) Received: from mxback5o.mail.yandex.net (mxback5o.mail.yandex.net [IPv6:2a02:6b8:0:1a2d::1f]) by forward102o.mail.yandex.net (Yandex) with ESMTP id 2D0436680CEE; Tue, 22 Sep 2020 15:57:25 +0300 (MSK) Received: from myt5-ca5ec8faf378.qloud-c.yandex.net (myt5-ca5ec8faf378.qloud-c.yandex.net [2a02:6b8:c12:2514:0:640:ca5e:c8fa]) by mxback5o.mail.yandex.net (mxback/Yandex) with ESMTP id D9gj7rE4sd-vOdenFrF; Tue, 22 Sep 2020 15:57:25 +0300 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex.ru; s=mail; t=1600779445; bh=csZbra3S5Igufw7tlVlltMOsFUf1y05GKIuGUcuw1Xg=; h=In-Reply-To:From:Date:References:To:Subject:Message-ID; b=cvM8XHbMAy3rsigi5nww35roTEkQ53BwyNkf8q3JEsCwp8Uk0qeH4VFqS9chwg7fA fg4Z3BO2i+aIQ8phgt0EOM4hOwGBfQZiD+Itss/hfuI/NYxPoZLY7maHE3K3cNPdbf YMwZZFc+RbluuA0er+Y+JwBLqmB8dJTMxOeEoi2k= Received: by myt5-ca5ec8faf378.qloud-c.yandex.net (smtp/Yandex) with ESMTPSA id GrDBCHtinv-vOnuqQeC; Tue, 22 Sep 2020 15:57:24 +0300 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client certificate not present) Subject: Re: IP reassembly To: Eugene Grosbein , "freebsd-net@freebsd.org" References: <88c72056-42a7-f104-ab08-7532fc5f649f@grosbein.net> From: "Andrey V. Elsukov" Autocrypt: addr=bu7cher@yandex.ru; prefer-encrypt=mutual; keydata= mQENBEwBF1kBCADB9sXFhBEUy8qQ4X63Y8eBatYMHGEFWN9ypS5lI3RE6qQW2EYbxNk7qUC5 21YIIS1mMFVBEfvR7J9uc7yaYgFCEb6Sce1RSO4ULN2mRKGHP3/Sl0ijZEjWHV91hY1YTHEF ZW/0GYinDf56sYpDDehaBF5wkWIo1+QK5nmj3vl0DIDCMNd7QEiWpyLVwECgLX2eOAXByT8B bCqVhJGcG6iFP7/B9Ll6uX5gb8thM9LM+ibwErDBVDGiOgvfxqidab7fdkh893IBCXa82H9N CNwnEtcgzh+BSKK5BgvPohFMgRwjti37TSxwLu63QejRGbZWSz3OK3jMOoF63tCgn7FvABEB AAG0JUFuZHJleSBWLiBFbHN1a292IDxidTdjaGVyQHlhbmRleC5ydT6JATgEEwECACIFAkwB F1kCGwMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJEAHF6gQQyKF6qmYIAI6ekfm1VA4T vqankI1ISE6ku4jV7UlpIQlEbE7/8n3Zd6teJ+pGOQhN5qk8QE7utdPdbktAzi+x7LIJVzUw 4TywZLXGrkP7VKYkfg6oyCGyzITghefQeJtr2TN4hYCkzPWpylkue8MtmqfZv/6royqwTbN+ +E09FQNvTgRUYJYTeQ1qOsxNRycwvw3dr2rOfuxShbzaHBB1pBIjGrMg8fC5pd65ACH5zuFV A0CoTNGMDrEZSfBkTW604UUHFFXeCoC3dwDZRKOWJ3GmMXns65Ai5YkA63BSHEE1Qle3VBhd cG1w0CB5FBV3pB27UVnf0jEbysrDqW4qN7XMRFSWNAy5AQ0ETAEXWQEIAJ2p6l9LBoqdH/0J PEFDY2t2gTvAuzz+8zs3R03dFuHcNbOwjvWCG0aOmVpAzkRa8egn5JB4sZaFUtKPYJEQ1Iu+ LUBwgvtXf4vWpzC67zs2dDuiW4LamH5p6xkTD61aHR7mCB3bg2TUjrDWn2Jt44cvoYxj3dz4 S49U1rc9ZPgD5axCNv45j72tggWlZvpefThP7xT1OlNTUqye2gAwQravXpZkl5JG4eOqJVIU X316iE3qso0iXRUtO7OseBf0PiVmk+wCahdreHOeOxK5jMhYkPKVn7z1sZiB7W2H2TojbmcK HZC22sz7Z/H36Lhg1+/RCnGzdEcjGc8oFHXHCxUAEQEAAYkBHwQYAQIACQUCTAEXWQIbDAAK CRABxeoEEMihegkYCAC3ivGYNe2taNm/4Nx5GPdzuaAJGKWksV+w9mo7dQvU+NmI2az5w8vw 98OmX7G0OV9snxMW+6cyNqBrVFTu33VVNzz9pnqNCHxGvj5dL5ltP160JV2zw2bUwJBYsgYQ WfyJJIM7l3gv5ZS3DGqaGIm9gOK1ANxfrR5PgPzvI9VxDhlr2juEVMZYAqPLEJe+SSxbwLoz BcFCNdDAyXcaAzXsx/E02YWm1hIWNRxanAe7Vlg7OL+gvLpdtrYCMg28PNqKNyrQ87LQ49O9 50IIZDOtNFeR0FGucjcLPdS9PiEqCoH7/waJxWp6ydJ+g4OYRBYNM0EmMgy1N85JJrV1mi5i Message-ID: <3c987023-f634-d42e-27fa-e680e837938b@yandex.ru> Date: Tue, 22 Sep 2020 15:54:22 +0300 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <88c72056-42a7-f104-ab08-7532fc5f649f@grosbein.net> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="NFpf4hHOprh6djHR4Cj5U03451cm3gwtc" X-Rspamd-Queue-Id: 4BwhD83tMSz3ybn X-Spamd-Bar: ------ Authentication-Results: mx1.freebsd.org; dkim=pass header.d=yandex.ru header.s=mail header.b=cvM8XHbM; dmarc=pass (policy=none) header.from=yandex.ru; spf=pass (mx1.freebsd.org: domain of bu7cher@yandex.ru designates 2a02:6b8:0:1a2d::602 as permitted sender) smtp.mailfrom=bu7cher@yandex.ru X-Spamd-Result: default: False [-6.37 / 15.00]; TO_DN_EQ_ADDR_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; FREEMAIL_FROM(0.00)[yandex.ru]; R_SPF_ALLOW(-0.20)[+ip6:2a02:6b8:0:1000::/52]; HAS_ATTACHMENT(0.00)[]; RCVD_COUNT_THREE(0.00)[4]; DKIM_TRACE(0.00)[yandex.ru:+]; RCPT_COUNT_TWO(0.00)[2]; DMARC_POLICY_ALLOW(-0.50)[yandex.ru,none]; NEURAL_HAM_SHORT(-1.16)[-1.156]; SIGNED_PGP(-2.00)[]; RCVD_IN_DNSWL_LOW(-0.10)[2a02:6b8:0:1a2d::602:from]; RCVD_TLS_LAST(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:+,3:~]; FREEMAIL_ENVFROM(0.00)[yandex.ru]; MID_RHS_MATCH_FROM(0.00)[]; ASN(0.00)[asn:13238, ipnet:2a02:6b8::/32, country:RU]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.004]; R_DKIM_ALLOW(-0.20)[yandex.ru:s=mail]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; DWL_DNSWL_NONE(0.00)[yandex.ru:dkim]; NEURAL_HAM_LONG(-1.01)[-1.015]; MIME_GOOD(-0.20)[multipart/signed,multipart/mixed,text/plain]; TO_MATCH_ENVRCPT_SOME(0.00)[]; MAILMAN_DEST(0.00)[freebsd-net] X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 22 Sep 2020 12:57:29 -0000 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --NFpf4hHOprh6djHR4Cj5U03451cm3gwtc Content-Type: multipart/mixed; boundary="dnolnT0B1eznxG92zNMba5dVEz9j3c1iX" --dnolnT0B1eznxG92zNMba5dVEz9j3c1iX Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 22.09.2020 15:40, Eugene Grosbein wrote: > Hi! >=20 > Is our IP reassembly facility supposed to handle incoming out-of-order = fragments? > For example, IPIP packet created with gif(4) interface is fragmented wi= th two parts, > and parts are delivered out of order, last fragment comes first. >=20 > In fact, I see this results in broken reassembly. Hi, IP reassembly is done in ip_input(), it doesn't matter what UL protocol is inside. Do you have some traces? You can use dtrace fbt probes to track your datagramms. --=20 WBR, Andrey V. 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