From owner-freebsd-net@FreeBSD.ORG Tue May 18 08:40:41 2010 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 789B01065670; Tue, 18 May 2010 08:40:41 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from mail.zoral.com.ua (mx0.zoral.com.ua [91.193.166.200]) by mx1.freebsd.org (Postfix) with ESMTP id E5D718FC18; Tue, 18 May 2010 08:40:40 +0000 (UTC) Received: from deviant.kiev.zoral.com.ua (root@deviant.kiev.zoral.com.ua [10.1.1.148]) by mail.zoral.com.ua (8.14.2/8.14.2) with ESMTP id o4I8ejMD089792 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 18 May 2010 11:40:45 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: from deviant.kiev.zoral.com.ua (kostik@localhost [127.0.0.1]) by deviant.kiev.zoral.com.ua (8.14.4/8.14.4) with ESMTP id o4I8eW50078895; Tue, 18 May 2010 11:40:32 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: (from kostik@localhost) by deviant.kiev.zoral.com.ua (8.14.4/8.14.4/Submit) id o4I8eWMr078894; Tue, 18 May 2010 11:40:32 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: deviant.kiev.zoral.com.ua: kostik set sender to kostikbel@gmail.com using -f Date: Tue, 18 May 2010 11:40:32 +0300 From: Kostik Belousov To: Yoshihiko Sarumaru Message-ID: <20100518084032.GU83316@deviant.kiev.zoral.com.ua> References: <20100517190525.GP83316@deviant.kiev.zoral.com.ua> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="3T4dLCyS4EPlIT+v" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.3i X-Virus-Scanned: clamav-milter 0.95.2 at skuns.kiev.zoral.com.ua X-Virus-Status: Clean X-Spam-Status: No, score=-2.4 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_50, DNS_FROM_OPENWHOIS autolearn=no version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on skuns.kiev.zoral.com.ua Cc: freebsd-net@freebsd.org, freebsd-stable@freebsd.org Subject: Re: odd behavior on select() after shutdown() 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: Tue, 18 May 2010 08:40:41 -0000 --3T4dLCyS4EPlIT+v Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, May 18, 2010 at 12:58:05PM +0900, Yoshihiko Sarumaru wrote: > Hi, >=20 > 2010/5/18 Kostik Belousov : > > On Tue, May 18, 2010 at 01:08:50AM +0900, Yoshihiko Sarumaru wrote: > >> Hi all, > >> > >> Select(2) has three arguments to get socket status for read, write and= except. > >> After upgrading to 8.0-RELEASE, select() after shutdown(SHUT_WR) retur= ns with > >> the status exceptfds is set. It means out-of-bound data can be read > >> from the socket, > >> but recv() with OOB flag returns ECONNRESET, and no packets with urgen= t flag > >> was observed by tcpdump. > >> It seems strange for me, but is it an intentional change on 8.x ? >=20 > > The patch below would fix the problem at hand. I am wondering what > > unintended consequences it might have. >=20 > It works perfect for me on 8.0-RELEASE, thanks! > I can't see how much this change has side effects, > but is it commitable to current or stable? >=20 > Kib, it seems you had changed some code using POLLHUP in uipc_socket.c. > I'm not sure it is related to this issue, but could you give us your comm= ents? Sometimes being kib, I have no further comments, except that I think that the behaviour you reported is consequence of Jeff and my changes. I intend to commit the patch tomorrow if nobody speaks up. We will see how it goes. --3T4dLCyS4EPlIT+v Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (FreeBSD) iEYEARECAAYFAkvyUn8ACgkQC3+MBN1Mb4hpdgCg1W1GI7dPleoulAhLjKjun7ik odAAn0AtxJPvZrAPfEhVtQ6rAGGvtYBb =hloN -----END PGP SIGNATURE----- --3T4dLCyS4EPlIT+v--