Date: Tue, 28 Feb 2017 22:58:20 +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: r314430 - head/sys/netinet6 Message-ID: <201702282258.v1SMwKdj086828@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: ae Date: Tue Feb 28 22:58:19 2017 New Revision: 314430 URL: https://svnweb.freebsd.org/changeset/base/314430 Log: When IPv6 fragments reassembly is complete, update mbuf's csum_data and csum_flags using information from all fragments. This fixes dropping of reassembled packets due to wrong checksum when the IPv6 checksum offloading is enabled on a network card. Obtained from: Yandex LLC MFC after: 1 week Sponsored by: Yandex LLC Modified: head/sys/netinet6/frag6.c Modified: head/sys/netinet6/frag6.c ============================================================================== --- head/sys/netinet6/frag6.c Tue Feb 28 22:54:52 2017 (r314429) +++ head/sys/netinet6/frag6.c Tue Feb 28 22:58:19 2017 (r314430) @@ -528,6 +528,11 @@ insert: af6 = ip6af->ip6af_down; frag6_deq(ip6af); while (af6 != (struct ip6asfrag *)q6) { + m->m_pkthdr.csum_flags &= + IP6_REASS_MBUF(af6)->m_pkthdr.csum_flags; + m->m_pkthdr.csum_data += + IP6_REASS_MBUF(af6)->m_pkthdr.csum_data; + af6dwn = af6->ip6af_down; frag6_deq(af6); while (t->m_next) @@ -538,6 +543,10 @@ insert: af6 = af6dwn; } + while (m->m_pkthdr.csum_data & 0xffff0000) + m->m_pkthdr.csum_data = (m->m_pkthdr.csum_data & 0xffff) + + (m->m_pkthdr.csum_data >> 16); + /* adjust offset to point where the original next header starts */ offset = ip6af->ip6af_offset - sizeof(struct ip6_frag); free(ip6af, M_FTABLE);
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201702282258.v1SMwKdj086828>