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From: Wei Hu <whu@FreeBSD.org>
Date: Mon, 22 Oct 2018 11:23:51 +0000 (UTC)
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Subject: svn commit: r339585 - head/sys/dev/hyperv/netvsc
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Author: whu
Date: Mon Oct 22 11:23:51 2018
New Revision: 339585
URL: https://svnweb.freebsd.org/changeset/base/339585

Log:
  Do not trop UDP traffic when TXCSUM_IPV6 flag is on
  
  PR:		231797
  Submitted by:	whu
  Reviewed by:	dexuan
  Obtained from:	Kevin Morse
  MFC after:	3 days
  Sponsored by:	Microsoft
  Differential Revision:	https://bugs.freebsd.org/bugzilla/attachment.cgi?id=198333&action=diff

Modified:
  head/sys/dev/hyperv/netvsc/if_hn.c

Modified: head/sys/dev/hyperv/netvsc/if_hn.c
==============================================================================
--- head/sys/dev/hyperv/netvsc/if_hn.c	Mon Oct 22 10:38:38 2018	(r339584)
+++ head/sys/dev/hyperv/netvsc/if_hn.c	Mon Oct 22 11:23:51 2018	(r339585)
@@ -861,7 +861,8 @@ hn_set_hlen(struct mbuf *m_head)
 
 		PULLUP_HDR(m_head, ehlen + sizeof(*ip6));
 		ip6 = mtodo(m_head, ehlen);
-		if (ip6->ip6_nxt != IPPROTO_TCP) {
+		if (ip6->ip6_nxt != IPPROTO_TCP &&
+		    ip6->ip6_nxt != IPPROTO_UDP) {
 			m_freem(m_head);
 			return (NULL);
 		}