Date: Mon, 4 Jan 2010 14:56:17 +0000 (UTC) From: "Bjoern A. Zeeb" <bz@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-6@freebsd.org Subject: svn commit: r201502 - stable/6/sys/netipsec Message-ID: <201001041456.o04EuHkf090881@svn.freebsd.org>
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Author: bz Date: Mon Jan 4 14:56:16 2010 New Revision: 201502 URL: http://svn.freebsd.org/changeset/base/201502 Log: MFC r199896: Directly send data uncompressed if the packet payload size is lower than the compression algorithm threshold. Modified: stable/6/sys/netipsec/xform_ipcomp.c Directory Properties: stable/6/sys/ (props changed) stable/6/sys/contrib/pf/ (props changed) stable/6/sys/dev/cxgb/ (props changed) Modified: stable/6/sys/netipsec/xform_ipcomp.c ============================================================================== --- stable/6/sys/netipsec/xform_ipcomp.c Mon Jan 4 14:52:45 2010 (r201501) +++ stable/6/sys/netipsec/xform_ipcomp.c Mon Jan 4 14:56:16 2010 (r201502) @@ -350,6 +350,17 @@ ipcomp_output( ipcompx = sav->tdb_compalgxform; IPSEC_ASSERT(ipcompx != NULL, ("null compression xform")); + /* + * Do not touch the packet in case our payload to compress + * is lower than the minimal threshold of the compression + * alogrithm. We will just send out the data uncompressed. + * See RFC 3173, 2.2. Non-Expansion Policy. + */ + if (m->m_pkthdr.len <= ipcompx->minlen) { + /* XXX-BZ V_ipcompstat.threshold++; */ + return ipsec_process_done(m, isr); + } + ralen = m->m_pkthdr.len - skip; /* Raw payload length before comp. */ hlen = IPCOMP_HLENGTH;
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