Add a routine that indicates where there are any tap listeners

registered (not whether there are any tap *filters* registered).

Do dissection in Tethereal iff:

	we're printing information about each packet;

	we're using a read filter on the packets;

	there are any tap listeners registered (even if there are no tap
	filters registered - not all taps use filters).


git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@11040 f5534014-38df-0310-8fa8-9805f1628bb7

1 files changed, 14 insertions, 3 deletions

diff --git a/tap.c b/tap.c
index 044956bb07..adb290e4fc 100644
--- a/tap.c
+++ b/tap.c
@@ -1,7 +1,7 @@
 /* tap.c
  * packet tap interface   2002 Ronnie Sahlberg
  *
- * $Id: tap.c,v 1.9 2003/04/23 08:20:02 guy Exp $
+ * $Id: tap.c,v 1.10 2004/05/31 09:53:21 guy Exp $
  *
  * Ethereal - Network traffic analyzer
  * By Gerald Combs <gerald@ethereal.com>
@@ -417,5 +417,16 @@ remove_tap_listener(void *tapdata)
 	return;
 }
 
-
-
+/*
+ * Return TRUE if we have tap listeners, FALSE otherwise.
+ * Checking "num_tap_filters" isn't the right way to check whether we need
+ * to do any dissection in order to run taps, as not all taps necessarily
+ * have filters, and "num_tap_filters" is the number of tap filters, not
+ * the number of tap listeners; it's only the right way to check whether
+ * we need to build a protocol tree when doing dissection.
+ */
+gboolean
+have_tap_listeners(void)
+{
+	return tap_listener_queue != NULL;
+}