Date: Thu, 26 Sep 2019 03:09:42 +0000 (UTC) From: Cy Schubert <cy@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r352737 - head/sys/contrib/ipfilter/netinet Message-ID: <201909260309.x8Q39glb012497@repo.freebsd.org>
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Author: cy Date: Thu Sep 26 03:09:42 2019 New Revision: 352737 URL: https://svnweb.freebsd.org/changeset/base/352737 Log: ipf mistakenly regards UDP packets with a checksum of 0xffff as bad. Obtained from: NetBSD fil.c r1.30, NetBSD PR/54443 MFC after: 3 days Modified: head/sys/contrib/ipfilter/netinet/fil.c Modified: head/sys/contrib/ipfilter/netinet/fil.c ============================================================================== --- head/sys/contrib/ipfilter/netinet/fil.c Thu Sep 26 02:54:45 2019 (r352736) +++ head/sys/contrib/ipfilter/netinet/fil.c Thu Sep 26 03:09:42 2019 (r352737) @@ -6730,8 +6730,11 @@ ipf_checkl4sum(fin) /*NOTREACHED*/ } - if (csump != NULL) + if (csump != NULL) { hdrsum = *csump; + if (fin->fin_p == IPPROTO_UDP && hdrsum == 0xffff) + hdrsum = 0x0000; + } if (dosum) { sum = fr_cksum(fin, fin->fin_ip, fin->fin_p, fin->fin_dp);
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