Date: Wed, 3 Jul 2019 09:46:30 +0000 (UTC) From: "Andrey V. Elsukov" <ae@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r349644 - stable/12/sys/netpfil/ipfw Message-ID: <201907030946.x639kUVP055769@repo.freebsd.org>
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Author: ae Date: Wed Jul 3 09:46:30 2019 New Revision: 349644 URL: https://svnweb.freebsd.org/changeset/base/349644 Log: MFC r349366: Follow the RFC 3128 and drop short TCP fragments with offset = 1. Modified: stable/12/sys/netpfil/ipfw/ip_fw2.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/netpfil/ipfw/ip_fw2.c ============================================================================== --- stable/12/sys/netpfil/ipfw/ip_fw2.c Wed Jul 3 09:45:02 2019 (r349643) +++ stable/12/sys/netpfil/ipfw/ip_fw2.c Wed Jul 3 09:46:30 2019 (r349644) @@ -1688,6 +1688,11 @@ do { \ default: break; } + } else { + if (offset == 1 && proto == IPPROTO_TCP) { + /* RFC 3128 */ + goto pullup_failed; + } } ip = mtod(m, struct ip *);
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