Explain why we're discarding interfaces we can't open for capturing.

[libpcap] / inet.c

diff --git a/inet.c b/inet.c
index 0cc62ba5730847460a1d8493532c982995957f97..e358f5bad37dd9abcd4d60b7939f105af670930d 100644 (file)
--- a/inet.c
+++ b/inet.c
@@ -34,7 +34,7 @@
 
 #ifndef lint
 static const char rcsid[] _U_ =
-    "@(#) $Header: /tcpdump/master/libpcap/inet.c,v 1.64 2005-01-28 20:51:20 guy Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/libpcap/inet.c,v 1.65 2005-01-29 00:47:25 guy Exp $ (LBL)";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -136,6 +136,14 @@ add_or_find_if(pcap_if_t **curdev_ret, pcap_if_t **alldevs, const char *name,
 
        /*
         * Can we open this interface for live capture?
+        *
+        * We do this check so that interfaces that ae supplied
+        * by the interface enumeration mechanism we're using
+        * but that don't support packet capture aren't included
+        * in the list.  An example of this is loopback interfaces
+        * on Solaris; we don't just omit loopback interfaces
+        * becaue you *can* capture on loopback interfaces on some
+        * OSes.
         */
        p = pcap_open_live(name, 68, 0, 0, errbuf);
        if (p == NULL) {