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[62.210.37.82]) by smtp.gmail.com with ESMTPSA id em21sm2665294pjb.31.2019.09.03.08.02.19 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 03 Sep 2019 08:02:21 -0700 (PDT) To: qemu-devel@nongnu.org From: Chris Heinze Openpgp: preference=signencrypt Autocrypt: addr=c.heinze@precibake.com; prefer-encrypt=mutual; keydata= mQINBFwFaQwBEAC/zRZdYj6vXrXnbTjVI5e0HyCnKeuNeHtjcyXLuiAo9OVIOtUoJEDZW3fU OXMVacin9AlUR0tEQn88t1S+Qd4oO0pbcNmVeQ7+2GQewIO79C0+/X7Lm4Vh0rMYvCV55uLT aUMvpzzKe7dVz0ha9NZD6blKp+I5V5TWuOAbr6arZHMizvSR35Lh1x3aHeXJCcVUhwp/reUO KNOtdom7sT7af8M5hLnIzIFZjgafQsujssgHXdGObgxszqKkGbnExsbcJLiI42R3YrLhnb2w +pKIHvtsiWQ97KBw/LwMVQ30FlqR1JDNvjNsQZvjhvrZ4uNWWVO7y1KJkI6XQA8aYfN/mXgN EkZJ1R/FyAWEpkc3zjGALpSEqb43jueKjSH58/SqiA+Gh+3JcIlD7npW4/kh2jufb39wvacY pqU+LFlqO2GNuBpb7SRvEIM6koaQnJlzKFq+FlyTqRFhd2Q2BgM//8ElqMDSRAkv8iNs2iYn ETHkuPXJ9+gO9j/kA7mvq2lhzlCeUm/QiN+qlcALBlg1Wq3Mjbs0vEafzyy+qGAT+hXQZ55j DjNonvSUYGE8JjqaTOjATjMH2i8QN8ExDJ+GTUYYQxG3Q3IVFFT/bjCxZJOlgAWUP8KbL0SU ezTJD8GYDYOkuf6FYlXyQSHDNjqUDtn/vhevWCOyGqhD7n2rwQARAQABtCVDaHJpcyBIZWlu emUgPGMuaGVpbnplQHByZWNpYmFrZS5jb20+iQJUBBMBCAA+FiEEu1utzBub+9fkqxKop21m L3MgCdcFAlwFaQwCGyMFCQlmAYAFCwkIBwIGFQgJCgsCBBYCAwECHgECF4AACgkQp21mL3Mg CdfMtw//UZmW12Dwia5DVo0Dl4Jm6WaL2VuVPMe5UkzLMMwH2gx4kgduhDjH4Lq8Z4jqWoS1 g/iSGD/ovGvb6A5CHItvRTi8wGpUQCt17yegJRZY/7UG70lu7PeIXkhC15nWPPzeeZfDY4ok gWau4/RG13CCNoKBctUwXtBf1dzijC161doMElE4/khn9xtJ9ncDznb7pFwFnD4FzMz592d2 nWmm60UDDuxnGC4/kI5bgnt9bjRTko+k6oHJ0wF+KC+ggXN5U7XK4rjYy9kKB1xQYerPVrD7 RI9on96xrUo2AIcciXzLL4B+RV2UqJrph8AfEwOnLDJT5EWVNvkP7LE+sCA22afX3k1fabN8 BgoYRp6p9ccge9TFhx0zIW+aU+uCk6HmUanmu4wNeAWwMEn8btKlDMUD6UanhhzcuUs/kX8j HoUeokI9GZlY2LtOQH8cWiuQi8qgnYoc4XYfzV8HtuXpJvFF6yE3rIt2Jtp4dCokKGsp9SrC IsaUTgLHEHIUy9eZ8RpPs3sTLpBsCd87bLpo1x2J5GsXbHm1l8WARZKw3x+0Xl3jMw1ey92X JIUQGnId+nVfiNdLzRKxfVWZsnXpBW8+D6R5MsW09qFpPDbELkVBlSt6WzTuLzPnJfzg/sjd XGaR++GHaLZwbZir54hrfuq4SEwYxxFGd3q55XoL9cy5Ag0EXAVpDAEQANjrGUB1qfqdVRO2 YbAqMFK0Cj3YwguGr6xVt/A2z5JEePKVQ1f/OTUps1vqRQ+kn4Fz7ZhLiAqH0n7zHk9KYWfx vUEW7H8swtrDIJI6Oz09XoalXDkj2BxdGvk3NPcchq9JXX3BKqpZerHQC5Cyy/cgVDwDuT5A eLFCtYQ9MpTYak7C99JvW48mxR2gJq1JfkuhcFgPJHSo2WOnuCoPNJNXir0PvJpocBdXCHSJ 22lWJ6bn8tBY6qnTeh+/xr6Wyz1ZMwPjulaOzWNzcg+PV/BRff25Cg9mxiFWcuwcXcXh5pKf IaUhCJw/cKA73LcB5yYj0jWJSxKwlsUJE/SjsmJDBCcX2Hl+imIb8GVrM9OsdCs9EollthrR HKUHO7mUmx0STEcKAf62zqdrtyB2YBQqFyAZF3w7uKT8jadM3AZzPDqISvfUo9dvMJ2U1mnz fpWDVP34fLXlqcyhPEAIbG551cZTOgrDQPWyT8PRfFwTVxLB5rAzWkuoCPtYzKZQz7C3Jvbi ff8k1Ya3RZcS6ibZUt8qAROwdhL/FDt6oD5hh5VvEvE7pgTAOUmyIOvX0mjR1zMLsglt3kCA s2GqRF8t/dq8YBzxyV7sMZHVrX1UKFJ5iUHYjIxY3jdKzg3RXLAQu4YXuqerBWLNK1MgSsjI SqqLZ7FxrAjBvFJtR4SfABEBAAGJAjwEGAEIACYWIQS7W63MG5v71+SrEqinbWYvcyAJ1wUC XAVpDAIbDAUJCWYBgAAKCRCnbWYvcyAJ18LsD/9Rvq1fm3wpVFOnjrgcw4mPlyzYYbV3wgva /+WBWGLjMSXct0aRJuwcn1fZhecb0VB3x6AbbI1Tju9ueGgaDp+ascwu6b+EK4TM6OoLm24W B+xPtzGVZNVqisJTkwJTVnKOx/HWhJjc6qb/5No1B2UN1sv0SKUMDqoq5D7NuK3qBrCaNLFK QtYhiyVWPGmGCS6vl7evw/beOJY7G3xcMc4z2qjAp6EvJMHNU6dU/QznorKdxwFxOg/guqzJ tL1f5zCohqpuTa+CRmQPL+kLE5tL3TOflnr/29pqBeTXBtUZrShz1Oeril2+Ha0mwnVblsXu nqUfssolRIjtMTIK1vj6W5pBKHUZxPX9eTKqPFpMvQ0tQy0ETsgggNp8+iE8umPw53x7AAif JeqRDdG+5HTxt2gcKIxVmTtlFo8VfLtuUk7vzIT6Wk0DKmt2IR/RpEdwr4hCoxNVgub9Ls8Y qIBCSCpM8DyZ1UB3XNqrQuht0kNrNazg64EQkIu8BOsnB8tZsL6Sq2h8f86WMkm2eXK8tLbv 9iIVcoiT/QvJ0njwfzAClzZhH5104cy3AjKbeoBdIuiOApVtrAdjsuMmZ/uE2PGQsTopcbmV thYsAulFKlFBPVue23G1HOhZkjvnZ5f+qHfz2firwE72v7OfRfvMN0ISUlkseaOGrzYuFUvp FA== Message-ID: <0115e29c-2254-09c3-13d5-6dfb5307d968@precibake.com> Date: Tue, 3 Sep 2019 17:02:15 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::52f X-Mailman-Approved-At: Tue, 03 Sep 2019 11:27:12 -0400 Subject: [Qemu-devel] slirp, incoming packets get truncated X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" with slirp, incoming packets to the guest get truncated (outgoing seem to work correctly). this has been observed on a x86_64 machine with devuan2 and qemu 4.1.0. e.g. on the host: root@host:~# qemu-system-x86_64 -net nic,model=virtio -net user,hostfwd=udp::19003-:19003 root@host:~# head -c 9000 /dev/zero | nc -u 127.0.0.1 19003 on the guest: root@guest:~# tcpdump -ni eth0 port 19003 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes 16:49:39.430959 IP 10.0.2.2.33294 > 10.0.2.15.19003: UDP, bad length 9000 > 1472 these packets obviously are truncated to 1472 bytes. i tried to change slirp/src/if.h to: #define IF_MTU 9000 #define IF_MRU 9000 but the resulting qemu-system-x86_64 binary did not behave differently. -- Mit freundlichen Grüßen / Kind regards, Chris Heinze *Network-/System-/DevOps-Engineer* *PreciBake GmbH* Gollierstr. 70 80339 München Deutschland / Germany *P:* +49-(0)-89-2154895-30 <+49.89.2154895.30> *F:* +49-(0)-89-2154895-99 *E:* c.heinze@precibake.com *W:* www.precibake.com Handelsregister / Commercial Register: Amtsgericht München, HRB 206356 Steuer-Nr. / Tax-ID143/172/11644 Umsatzsteuer-ID / VAT registration number: DE290040302 Geschäftsführer / Managing Director: Dr. Ingo Stork-Wersborg Der Inhalt dieser E-Mail ist ausschliesslich fuer den/die bezeichneten Empfaenger bestimmt. 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