Module Name: src
Committed By: martin
Date: Wed Jun 9 15:38:40 UTC 2021
Modified Files:
src/sys/net: bpf.h
Log Message:
Add a (FreeBSD compatible) bpf_peers_present() predicate to allow
testing for active listeners on a tap.
To generate a diff of this commit:
cvs rdiff -u -r1.75 -r1.76 src/sys/net/bpf.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/net/bpf.h
diff -u src/sys/net/bpf.h:1.75 src/sys/net/bpf.h:1.76
--- src/sys/net/bpf.h:1.75 Thu Jun 11 13:36:20 2020
+++ src/sys/net/bpf.h Wed Jun 9 15:38:39 2021
@@ -1,4 +1,4 @@
-/* $NetBSD: bpf.h,v 1.75 2020/06/11 13:36:20 roy Exp $ */
+/* $NetBSD: bpf.h,v 1.76 2021/06/09 15:38:39 martin Exp $ */
/*
* Copyright (c) 1990, 1991, 1993
@@ -501,6 +501,16 @@ bpf_change_type(struct ifnet *_ifp, u_in
bpf_ops->bpf_change_type(_ifp, _dlt, _hdrlen);
}
+static __inline bool
+bpf_peers_present(struct bpf_if *dp)
+{
+ /*
+ * Our code makes sure the driver visible pointer is NULL
+ * whenever there is no listener on this tap.
+ */
+ return dp != NULL;
+}
+
static __inline void
bpf_detach(struct ifnet *_ifp)
{
