From owner-freebsd-net@freebsd.org Sat Feb 24 13:22:17 2018 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id E0A28F11222 for ; Sat, 24 Feb 2018 13:22:17 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from hz.grosbein.net (hz.grosbein.net [78.47.246.247]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 6B20381E72 for ; Sat, 24 Feb 2018 13:22:17 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from eg.sd.rdtc.ru (root@eg.sd.rdtc.ru [62.231.161.221] (may be forged)) by hz.grosbein.net (8.15.2/8.15.2) with ESMTPS id w1ODM9EL026236 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 24 Feb 2018 14:22:10 +0100 (CET) (envelope-from eugen@grosbein.net) X-Envelope-From: eugen@grosbein.net X-Envelope-To: longwitz@incore.de Received: from [10.58.0.4] ([10.58.0.4]) by eg.sd.rdtc.ru (8.15.2/8.15.2) with ESMTPS id w1ODM1WQ005831 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Sat, 24 Feb 2018 20:22:01 +0700 (+07) (envelope-from eugen@grosbein.net) Subject: Re: loopback routes pinned by commit r326012 for FreeBSD 10 cannot be deleted To: Andreas Longwitz References: <5A9075CB.10408@incore.de> <5A90E679.3030106@grosbein.net> <5A915C9D.7020000@incore.de> <5A9162C9.5050206@grosbein.net> Cc: freebsd-net@freebsd.org From: Eugene Grosbein Message-ID: <5A9166F4.1080100@grosbein.net> Date: Sat, 24 Feb 2018 20:21:56 +0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.7.2 MIME-Version: 1.0 In-Reply-To: <5A9162C9.5050206@grosbein.net> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=2.2 required=5.0 tests=BAYES_00, LOCAL_FROM, RDNS_NONE autolearn=no autolearn_force=no version=3.4.1 X-Spam-Report: * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * 1.9 RDNS_NONE Delivered to internal network by a host with no rDNS * 2.6 LOCAL_FROM From my domains X-Spam-Level: ** X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on hz.grosbein.net X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 24 Feb 2018 13:22:18 -0000 24.02.2018 20:04, Eugene Grosbein wrote: >> But deleting the loopback route manually does not work anymore, is this >> intended behaviour ? >> >> I would like to control the routing table as much as possible. > > This is side effect of loopback routes being intentionally protected with RTF_PINNED flag > in recent FreeBSD versions so that link routes can override ones installed by routing daemons. > > Perhaps, ifconfig(8) utility should be extended to use RTF_PINNED to be able to modify such routes. I mean, route(8). Please try this patch that restores its ability to manually remove such routes. Index: sbin/route/route.c =================================================================== --- sbin/route/route.c (revision 329903) +++ sbin/route/route.c (working copy) @@ -1535,8 +1535,10 @@ rtmsg(int cmd, int flags, int fib) so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); rtm_addrs |= RTA_IFP; } - } else + } else { cmd = RTM_DELETE; + flags |= RTF_PINNED; + } #define rtm m_rtmsg.m_rtm rtm.rtm_type = cmd; rtm.rtm_flags = flags;