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From: Michael Tuexen <tuexen@FreeBSD.org>
Date: Sat, 21 Jul 2018 02:14:13 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r336574 - head/sys/netinet
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Author: tuexen
Date: Sat Jul 21 02:14:13 2018
New Revision: 336574
URL: https://svnweb.freebsd.org/changeset/base/336574

Log:
  Set the IPv4 version in the IP header for UDP and UDPLite.

Modified:
  head/sys/netinet/udp_usrreq.c

Modified: head/sys/netinet/udp_usrreq.c
==============================================================================
--- head/sys/netinet/udp_usrreq.c	Sat Jul 21 01:33:07 2018	(r336573)
+++ head/sys/netinet/udp_usrreq.c	Sat Jul 21 02:14:13 2018	(r336574)
@@ -1397,6 +1397,7 @@ udp_output(struct inpcb *inp, struct mbuf *m, struct s
 	 */
 	ui = mtod(m, struct udpiphdr *);
 	bzero(ui->ui_x1, sizeof(ui->ui_x1));	/* XXX still needed? */
+	ui->ui_v = IPVERSION << 4;
 	ui->ui_pr = pr;
 	ui->ui_src = laddr;
 	ui->ui_dst = faddr;
@@ -1419,8 +1420,7 @@ udp_output(struct inpcb *inp, struct mbuf *m, struct s
 		 * the entire UDPLite packet is covered by the checksum.
 		 */
 		cscov_partial = (cscov == 0) ? 0 : 1;
-	} else
-		ui->ui_v = IPVERSION << 4;
+	}
 
 	/*
 	 * Set the Don't Fragment bit in the IP header.