From nobody Fri Apr 22 23:38:38 2022 X-Original-To: freebsd-current@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 A4E341A20DDE for ; Fri, 22 Apr 2022 23:38:48 +0000 (UTC) (envelope-from glebius@freebsd.org) Received: from cell.glebi.us (glebi.us [162.251.186.162]) (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-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "cell.glebi.us", Issuer "cell.glebi.us" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4KlW7q3sM3z3Cdq for ; Fri, 22 Apr 2022 23:38:47 +0000 (UTC) (envelope-from glebius@freebsd.org) Received: from cell.glebi.us (localhost [127.0.0.1]) by cell.glebi.us (8.16.1/8.16.1) with ESMTPS id 23MNcerD063514 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Fri, 22 Apr 2022 16:38:40 -0700 (PDT) (envelope-from glebius@freebsd.org) Received: (from glebius@localhost) by cell.glebi.us (8.16.1/8.16.1/Submit) id 23MNcchV063513; Fri, 22 Apr 2022 16:38:38 -0700 (PDT) (envelope-from glebius@freebsd.org) X-Authentication-Warning: cell.glebi.us: glebius set sender to glebius@freebsd.org using -f Date: Fri, 22 Apr 2022 16:38:38 -0700 From: Gleb Smirnoff To: Florian Smeets Cc: Michael Butler , freebsd-current@freebsd.org Subject: Re: IPv6 TCP: first two SYN packets to local v6 unicast addresses ignored Message-ID: References: <131c363a-7b7d-a106-5b8a-6838e7a66567@smeets.xyz> <9679642b-5de6-28be-a64b-07375c3efeba@smeets.xyz> <7cd2e76a-c6d1-e8d7-b9fb-b8797f1ca731@smeets.xyz> List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@freebsd.org MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="XgW92qlAwpHkZehI" Content-Disposition: inline In-Reply-To: <7cd2e76a-c6d1-e8d7-b9fb-b8797f1ca731@smeets.xyz> X-Rspamd-Queue-Id: 4KlW7q3sM3z3Cdq X-Spamd-Bar: - Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=softfail (mx1.freebsd.org: 162.251.186.162 is neither permitted nor denied by domain of glebius@freebsd.org) smtp.mailfrom=glebius@freebsd.org X-Spamd-Result: default: False [-1.29 / 15.00]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; FREEFALL_USER(0.00)[glebius]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; TO_DN_SOME(0.00)[]; NEURAL_HAM_LONG(-0.85)[-0.847]; MIME_GOOD(-0.10)[multipart/mixed,text/plain,text/x-diff]; HAS_XAW(0.00)[]; DMARC_NA(0.00)[freebsd.org]; HAS_ATTACHMENT(0.00)[]; R_SPF_SOFTFAIL(0.00)[~all]; TO_MATCH_ENVRCPT_SOME(0.00)[]; NEURAL_SPAM_SHORT(0.39)[0.394]; NEURAL_HAM_MEDIUM(-0.74)[-0.740]; MLMMJ_DEST(0.00)[freebsd-current]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:+]; ASN(0.00)[asn:27348, ipnet:162.251.186.0/24, country:US]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[] X-ThisMailContainsUnwantedMimeParts: N --XgW92qlAwpHkZehI Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi Florian, here is a patch that should help with the IPv6 problem. I'm not yet committing it, it might be not final. -- Gleb Smirnoff --XgW92qlAwpHkZehI Content-Type: text/x-diff; charset=us-ascii Content-Disposition: attachment; filename="ip6.sav.diff" diff --git a/sys/netinet6/ip6_input.c b/sys/netinet6/ip6_input.c index 3a13d2a9dc7..625de6d3657 100644 --- a/sys/netinet6/ip6_input.c +++ b/sys/netinet6/ip6_input.c @@ -825,7 +825,7 @@ ip6_input(struct mbuf *m) ip6_sprintf(ip6bufd, &ip6->ip6_dst))); goto bad; } - if (V_ip6_sav && !(rcvif->if_flags & IFF_LOOPBACK) && + if (V_ip6_sav && !(m->m_flags & M_LOOP) && __predict_false(in6_localip_fib(&ip6->ip6_src, rcvif->if_fib))) { IP6STAT_INC(ip6s_badscope); /* XXX */ --XgW92qlAwpHkZehI--