From owner-freebsd-bugs@FreeBSD.ORG Tue Dec 20 08:50:05 2011 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 8C7851065672 for ; Tue, 20 Dec 2011 08:50:05 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 48B2A8FC0C for ; Tue, 20 Dec 2011 08:50:05 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.5/8.14.5) with ESMTP id pBK8o5d5048260 for ; Tue, 20 Dec 2011 08:50:05 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.5/8.14.5/Submit) id pBK8o5e4048259; Tue, 20 Dec 2011 08:50:05 GMT (envelope-from gnats) Resent-Date: Tue, 20 Dec 2011 08:50:05 GMT Resent-Message-Id: <201112200850.pBK8o5e4048259@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Eugen Konkov Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id EB3DD1065672 for ; Tue, 20 Dec 2011 08:45:52 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from red.freebsd.org (red.freebsd.org [IPv6:2001:4f8:fff6::22]) by mx1.freebsd.org (Postfix) with ESMTP id DADB88FC08 for ; Tue, 20 Dec 2011 08:45:52 +0000 (UTC) Received: from red.freebsd.org (localhost [127.0.0.1]) by red.freebsd.org (8.14.4/8.14.4) with ESMTP id pBK8jqmP051633 for ; Tue, 20 Dec 2011 08:45:52 GMT (envelope-from nobody@red.freebsd.org) Received: (from nobody@localhost) by red.freebsd.org (8.14.4/8.14.4/Submit) id pBK8jq8T051632; Tue, 20 Dec 2011 08:45:52 GMT (envelope-from nobody) Message-Id: <201112200845.pBK8jq8T051632@red.freebsd.org> Date: Tue, 20 Dec 2011 08:45:52 GMT From: Eugen Konkov To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Cc: Subject: misc/163470: bad cksum in tcpdump output X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 20 Dec 2011 08:50:05 -0000 >Number: 163470 >Category: misc >Synopsis: bad cksum in tcpdump output >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Dec 20 08:50:04 UTC 2011 >Closed-Date: >Last-Modified: >Originator: Eugen Konkov >Release: 9.0-CURRENT (Jun10), 10.0-CURRENT (17 Dec) >Organization: ISP FreeLine >Environment: FreeBSD meta-up 10.0-CURRENT FreeBSD 10.0-CURRENT #1: Sat Dec 17 21:11:04 EET 2011 adm@meta-up:/usr/obj/usr/src/sys/KES_KERN_v10 i386 on both machines same result >Description: tcpdump -n -i vlan492 -vv 10:40:47.679077 IP (tos 0x0, ttl 1, id 60569, offset 0, flags [DF], proto TCP (6), length 40, bad cksum 0 (->8a69)!) 77.93.52.10.179 > 77.93.52.9.20224: Flags [.], cksum 0x02e8 (incorrect -> 0xc4f9), seq 23, ack 55, win 8759, length 0 10:41:06.339857 IP (tos 0xc0, ttl 1, id 46979, offset 0, flags [DF], proto TCP (6), length 59, bad cksum 0 (->bea8)!) 77.93.52.14.24404 > 77.93.52.9.179: Flags [P.], cksum 0x02ff (incorrect -> 0x25e0), seq 20:39, ack 219, win 8760, length 19: BGP, length: 19 is it right behaviour? >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted: