Get rid of an out-of-date comment.

Add a comment noting why we don't do BIOCSHDRCMPLT on OS X.

diff --git a/pcap-bpf.c b/pcap-bpf.c
index 3f7a4c164771be593703657cf1ba40c670aa6495..bd71a5669313967bc0de8550a27b62226d8534dc 100644 (file)
--- a/pcap-bpf.c
+++ b/pcap-bpf.c
@@ -20,7 +20,7 @@
  */
 #ifndef lint
 static const char rcsid[] _U_ =
-    "@(#) $Header: /tcpdump/master/libpcap/pcap-bpf.c,v 1.75 2004-03-24 07:00:41 guy Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/libpcap/pcap-bpf.c,v 1.76 2004-03-24 19:52:46 guy Exp $ (LBL)";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -527,16 +527,6 @@ pcap_close_bpf(pcap_t *p)
 #define DLT_DOCSIS     143
 #endif
 
-/*
- * XXX - on AIX, IBM's tcpdump (and perhaps the incompatible-with-everybody-
- * else's libpcap in AIX 5.1) appears to forcibly load the BPF driver
- * if it's not already loaded, and to create the BPF devices if they
- * don't exist.
- *
- * It'd be nice if we could do the same, although the code to do so
- * might be version-dependent, alas (the way to do it isn't necessarily
- * documented).
- */
 pcap_t *
 pcap_open_live(const char *device, int snaplen, int promisc, int to_ms,
     char *ebuf)
@@ -783,6 +773,17 @@ pcap_open_live(const char *device, int snaplen, int promisc, int to_ms,
         * (Should we ignore errors?  Should we do this only if
         * we're open for writing?)
         *
+        * We don't do it on Mac OS X, because there's a bug wherein
+        * setting that flag causes writes to fail; see, for example:
+        *
+        *      http://cerberus.sourcefire.com/~jeff/archives/patches/macosx/BIOCSHDRCMPLT-10.3.3.patch
+        *
+        * If that bug gets fixed at some point in the future, we could,
+        * on OS X, do a "uname()" call to see whether we're on a version
+        * of OS X without the bug and, if so, make the call.  (It'd be
+        * nice if we could somehow determine whether you're running
+        * on an OS X with one of Jeff's patches to fix that problem....)
+        *
         * XXX - I seem to remember some packet-sending bug in some
         * BSDs - check CVS log for "bpf.c"?
         */