From 11c1cf8ee2404e010992586edd4335aec0e5c719 Mon Sep 17 00:00:00 2001
From: guy <guy>
Date: Sun, 29 Jul 2001 01:22:40 +0000
Subject: Add comments to "pcap_stats()" indicating what the counters mean on
 the various platforms (assuming the vendors' documentation is correct and
 that I've correctly interpreted it).

---
 pcap-dlpi.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'pcap-dlpi.c')

diff --git a/pcap-dlpi.c b/pcap-dlpi.c
index fc53f43..f2c9f58 100644
--- a/pcap-dlpi.c
+++ b/pcap-dlpi.c
@@ -38,7 +38,7 @@
 
 #ifndef lint
 static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/libpcap/pcap-dlpi.c,v 1.69 2001-07-28 23:12:48 guy Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/libpcap/pcap-dlpi.c,v 1.70 2001-07-29 01:22:40 guy Exp $ (LBL)";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -124,6 +124,17 @@ int
 pcap_stats(pcap_t *p, struct pcap_stat *ps)
 {
 
+	/*
+	 * "ps_recv" counts packets handed to the filter, not packets
+	 * that passed the filter.
+	 *
+	 * "ps_drop" counts packets dropped inside the DLPI service
+	 * provider device device because of flow control requirements
+	 * or resource exhaustion; it doesn't count packets dropped by
+	 * the interface driver, or packets dropped upstream.  As
+	 * filtering is done in userland, it counts packets regardless
+	 * of whether they would've passed the filter.
+	 */
 	*ps = p->md.stat;
 	return (0);
 }
-- 
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