Date: Tue, 25 Jun 2019 11:40:38 +0000 (UTC) From: "Andrey V. Elsukov" <ae@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r349366 - head/sys/netpfil/ipfw Message-ID: <201906251140.x5PBectm030416@repo.freebsd.org>
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Author: ae Date: Tue Jun 25 11:40:37 2019 New Revision: 349366 URL: https://svnweb.freebsd.org/changeset/base/349366 Log: Follow the RFC 3128 and drop short TCP fragments with offset = 1. Reported by: emaste MFC after: 1 week Modified: head/sys/netpfil/ipfw/ip_fw2.c Modified: head/sys/netpfil/ipfw/ip_fw2.c ============================================================================== --- head/sys/netpfil/ipfw/ip_fw2.c Tue Jun 25 09:11:22 2019 (r349365) +++ head/sys/netpfil/ipfw/ip_fw2.c Tue Jun 25 11:40:37 2019 (r349366) @@ -1719,6 +1719,11 @@ do { \ default: break; } + } else { + if (offset == 1 && proto == IPPROTO_TCP) { + /* RFC 3128 */ + goto pullup_failed; + } } UPDATE_POINTERS();
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