From 7457fd34f44caf5a75380b731c30c169781637ed Mon Sep 17 00:00:00 2001
From: David Gwynne <dlg@cvs.openbsd.org>
Date: Mon, 10 Jun 2019 23:45:20 +0000
Subject: add m_microtime for getting the wall clock time associated with a
 packet

if the packet has the M_TIMESTAMP csum_flag, ph_timestamp is added
to the boottime clock, otherwise it just uses microtime().
---
 sys/kern/uipc_mbuf.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

(limited to 'sys/kern')

diff --git a/sys/kern/uipc_mbuf.c b/sys/kern/uipc_mbuf.c
index d100d3dd65b..019d0296a8d 100644
--- a/sys/kern/uipc_mbuf.c
+++ b/sys/kern/uipc_mbuf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uipc_mbuf.c,v 1.268 2019/02/10 22:45:58 tedu Exp $	*/
+/*	$OpenBSD: uipc_mbuf.c,v 1.269 2019/06/10 23:45:19 dlg Exp $	*/
 /*	$NetBSD: uipc_mbuf.c,v 1.15.4.1 1996/06/13 17:11:44 cgd Exp $	*/
 
 /*
@@ -1445,6 +1445,19 @@ fail:
 	return (NULL);
 }
 
+void
+m_microtime(const struct mbuf *m, struct timeval *tv)
+{
+	if (ISSET(m->m_pkthdr.csum_flags, M_TIMESTAMP)) {
+		struct timeval btv, utv;
+
+		NSEC_TO_TIMEVAL(m->m_pkthdr.ph_timestamp, &utv);
+		microboottime(&btv);
+		timeradd(&btv, &utv, tv);
+	} else
+		microtime(tv);
+}
+
 void *
 m_pool_alloc(struct pool *pp, int flags, int *slowdown)
 {
-- 
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