From nobody Tue Apr 23 05:19:23 2024 X-Original-To: freebsd-stable@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4VNr5W47TWz5JSW6 for ; Tue, 23 Apr 2024 05:19:27 +0000 (UTC) (envelope-from gerrit.kuehn@aei.mpg.de) Received: from umail2.aei.mpg.de (umail2.aei.mpg.de [194.94.224.8]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4VNr5W1BL4z4fQy; Tue, 23 Apr 2024 05:19:27 +0000 (UTC) (envelope-from gerrit.kuehn@aei.mpg.de) Authentication-Results: mx1.freebsd.org; none Received: from arc.aei.uni-hannover.de (ahgate1.aei.uni-hannover.de [130.75.117.49]) by umail2.aei.mpg.de (Postfix) with ESMTPS id 43A9F201041C; Tue, 23 Apr 2024 07:19:24 +0200 (CEST) Date: Tue, 23 Apr 2024 07:19:23 +0200 From: Gerrit =?UTF-8?B?S8O8aG4=?= To: Dag-Erling =?UTF-8?B?U23DuHJncmF2?= Cc: freebsd-stable@freebsd.org Subject: Re: possible regression handling packet fragmentation in 14.0 with tftp/pxe Message-ID: <20240423071923.52b90652@arc.aei.uni-hannover.de> In-Reply-To: <86o7a18ppl.fsf@ltc.des.dev> References: <20240419153951.5a23ce5f@arc.aei.uni-hannover.de> <86y1999wwe.fsf@ltc.des.dev> <20240422075948.5bb856ac@arc.aei.uni-hannover.de> <86o7a18ppl.fsf@ltc.des.dev> Organization: MPG X-Mailer: Claws Mail 3.19.0 (GTK+ 2.24.33; amd64-portbld-freebsd13.1) List-Id: Production branch of FreeBSD source code List-Archive: https://lists.freebsd.org/archives/freebsd-stable List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-stable@freebsd.org Sender: owner-freebsd-stable@FreeBSD.org MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/n=Wql0lmsdt=ZXg9KlPRuki"; protocol="application/pkcs7-signature"; micalg=SHA384 X-Spamd-Bar: ---- X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:680, ipnet:194.94.0.0/15, country:DE] X-Rspamd-Queue-Id: 4VNr5W1BL4z4fQy --Sig_/n=Wql0lmsdt=ZXg9KlPRuki Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Am Mon, 22 Apr 2024 15:57:42 +0200 schrieb Dag-Erling Sm=C3=B8rgrav : > Off the top of my head, it means the packet length according to its > header is longer than the capture length but the MF flag is not set. > Historically, it meant you needed to increase tcpdump's snaplen, but > these days it defaults to 256 kB so it shouldn't matter. It might be a > bug in bpf, or an interaction between pf and bpf. So maybe this is rather a red herring than a pointer to the actual difference in packet handling. > There were changes in tftpd, but I don't know if that's relevant. Most certainly not as I didn't touch the server side. The tftpd there is certainly old, but it worked fine up to FreeBSD 13.3 on the router. It is the update to 14.0 that triggered the problem. cu Gerrit --Sig_/n=Wql0lmsdt=ZXg9KlPRuki Content-Type: application/pkcs7-signature; name=smime.p7s Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename=smime.p7s MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgIFADCABgkqhkiG9w0B BwEAAKCCF/QwggQyMIIDGqADAgECAgEBMA0GCSqGSIb3DQEBBQUAMHsxCzAJBgNV BAYTAkdCMRswGQYDVQQIDBJHcmVhdGVyIE1hbmNoZXN0ZXIxEDAOBgNVBAcMB1Nh bGZvcmQxGjAYBgNVBAoMEUNvbW9kbyBDQSBMaW1pdGVkMSEwHwYDVQQDDBhBQUEg Q2VydGlmaWNhdGUgU2VydmljZXMwHhcNMDQwMTAxMDAwMDAwWhcNMjgxMjMxMjM1 OTU5WjB7MQswCQYDVQQGEwJHQjEbMBkGA1UECAwSR3JlYXRlciBNYW5jaGVzdGVy MRAwDgYDVQQHDAdTYWxmb3JkMRowGAYDVQQKDBFDb21vZG8gQ0EgTGltaXRlZDEh MB8GA1UEAwwYQUFBIENlcnRpZmljYXRlIFNlcnZpY2VzMIIBIjANBgkqhkiG9w0B AQEFAAOCAQ8AMIIBCgKCAQEAvkCd9G7h6naHHE1FRI6+RsiDBp3BKv4YH47kAvrz q11QihYxC5oG0MVwIs1JLVRjzLZuaEYLU+rLTCTAvHJO6vEVrvRUmhIKw3qyM2Di 2olV8yJY897cz++DhqKMlE+faPKYkEaEJ8d2v+PMNSyLXgdkZYLASLCokflhn3Yg 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