From 38dfad8c2a59ad794bf75d30d4d9e9c7c476dc45 Mon Sep 17 00:00:00 2001
From: mpi <mpi@openbsd.org>
Date: Sat, 23 May 2015 08:31:05 +0000
Subject: [PATCH] Pass output packets to bpf(4).  This is helpful when
 debugging stack issues.

ok reyk@
---
 sys/net/if_vether.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/sys/net/if_vether.c b/sys/net/if_vether.c
index 2dc92e015ec..5854e04c839 100644
--- a/sys/net/if_vether.c
+++ b/sys/net/if_vether.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: if_vether.c,v 1.23 2015/03/14 03:38:51 jsg Exp $ */
+/* $OpenBSD: if_vether.c,v 1.24 2015/05/23 08:31:05 mpi Exp $ */
 
 /*
  * Copyright (c) 2009 Theo de Raadt
@@ -29,6 +29,11 @@
 #include <netinet/in.h>
 #include <netinet/if_ether.h>
 
+#include "bpfilter.h"
+#if NBPFILTER > 0
+#include <net/bpf.h>
+#endif
+
 void	vetherattach(int);
 int	vetherioctl(struct ifnet *, u_long, caddr_t);
 void	vetherstart(struct ifnet *);
@@ -117,15 +122,17 @@ void
 vetherstart(struct ifnet *ifp)
 {
 	struct mbuf		*m;
-	int			 s;
 
 	for (;;) {
-		s = splnet();
 		IFQ_DEQUEUE(&ifp->if_snd, m);
-		splx(s);
-
 		if (m == NULL)
 			return;
+
+#if NBPFILTER > 0
+		if (ifp->if_bpf)
+			bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_OUT);
+#endif /* NBPFILTER > 0 */
+
 		ifp->if_opackets++;
 		m_freem(m);
 	}
-- 
2.20.1