From owner-freebsd-net@FreeBSD.ORG Wed Jun 10 14:13:57 2009 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C3FA5106564A for ; Wed, 10 Jun 2009 14:13:57 +0000 (UTC) (envelope-from seesaravanan@yahoo.co.in) Received: from web8313.mail.in.yahoo.com (web8313.mail.in.yahoo.com [202.43.219.5]) by mx1.freebsd.org (Postfix) with SMTP id D58B88FC14 for ; Wed, 10 Jun 2009 14:13:56 +0000 (UTC) (envelope-from seesaravanan@yahoo.co.in) Received: (qmail 64448 invoked by uid 60001); 10 Jun 2009 13:47:14 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.co.in; s=s1024; t=1244641634; bh=CXs+12XUAP9W2q6D2GmaoW5w7tfhvQDuMn8JELZe1q8=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:Cc:MIME-Version:Content-Type; b=ilpHtHpbsZoMtoc/Fa7NfmlNFuYvLd/ovx0sSezDdUKWlSQLLi50xSNsL8fKRDBi0nfXWkmXFatkJuNblsroEjHYjIa3pmVuJyRf9YhOD63fCv6smU/j6F3r/BDeEn3hV92MsovUUJJ1goz49/mcFofPjbVUL6d6nFwOc4Y4pK8= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.co.in; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:Cc:MIME-Version:Content-Type; b=IkXjTqjiwZTDui312BsPenkkWGR8M3Opi2yXX0ZdZbdCNtGofB9CTtCkZ2+x2uyXp6N8EgLSB20w09vV3jq+OeNR25q0YsnRJ0Zc06bVWig766XCrc/1vXmoFYoaXLdW6wERLBmzRTE8Wtm+0e8d3o4U6+hJ3bgTLwnFoI+wJtQ=; Message-ID: <28959.63465.qm@web8313.mail.in.yahoo.com> X-YMail-OSG: 4I_BJ8oVM1mcm5d7EZCvgIQwAFUYNnPKEvPIVbh3TAt8Ls62Xs_aA6SbEEEPicDDCbvRYEeKHO7qJ3SP2zvLi9n0qTl8DGW5bhJUwVRoVP5s9e5Rc7wlWBSR6gvO5g1KPjrP7JFaWCt0OxLBTZesObl38ZBByYnswuu486NzDlcTsfNKTlp6MYg8zbzMuT1HV8mw4f6hckw6DQ-- Received: from [125.22.253.101] by web8313.mail.in.yahoo.com via HTTP; Wed, 10 Jun 2009 19:17:13 IST X-Mailer: YahooMailClassic/5.4.12 YahooMailWebService/0.7.289.15 Date: Wed, 10 Jun 2009 19:17:13 +0530 (IST) From: saravana perumal To: freebsd-net@freebsd.org MIME-Version: 1.0 X-Mailman-Approved-At: Wed, 10 Jun 2009 15:56:30 +0000 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: sarbalas@gmail.com Subject: TCP Free-BSD setup behaviour. X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Jun 2009 14:13:58 -0000 =A0Hi , =A0 =A0 Have some behaviour change=A0 with FREEBSD=A0 compared to=A0 LINUX . 1. When sending the Same=A0 TCP packet once again [ Retranmission of TCP pa= cket ] Whether the Same Identification field [ IP packet]used or not . but when seeing that thru packet capture, Free BSD sending the differnt one= [ increases sequentially IP Identification] 2.Retranmission Time is not increasing Linearly with Respect to BSD. not ke= eping more time interval . AS per RFC=20 expecting Retransmission timeout should=A0 increase Linearly. Issue is not = seen with Linux Setup 3. Active SYN open state in FREE BSD setup=A0, Does not reach Syn-received = State. When Sending syn packet to DUT but=A0 for that FreeBSD is not sendin= g back=20 SYN/ACK .=A0 Issue is with Free BSD Setup.Linux works fine, =A0 4.When checking the State - TIME-WAIT=20 =A0 Sending FIN and expecting the ACK ;Getting the ACK properly. =A0 Sending Data Segment and Expecting the RST signal not getting the RST ;= Instead DUT is sending the Last TCP packet. =A0 Issue seen only in Free BSD. =A0 Same issue in FIN-WAIT2=A0 & FIN-WAIT1 State also . =A0 Sending FIN and Expect the ACK : Getting the ACK =A0 Sending Data segment with Data : Expecting the RST signal from DUT ; bu= t got Last transmitted TCP packet[ FIN -ACK] =A0 Any idea about the above scenario would be helpful =A0 Thanks, Saravanan.=0A=0A=0A