Add a new Wiretap encapsulation type WTAP_ENCAP_FDDI_BITSWAPPED, meaning

"FDDI with the MAC addresses bit-swapped"; whether the MAC addresses are
bit-swapped is a property of the machine on which the capture was taken,
not of the machine on which the capture is being read - right now, none
of the capture file formats we read indicate whether FDDI MAC addresses
are bit-swapped, but this does let us treat non-"libpcap" captures as
being bit-swapped or not bit-swapped independent of the machine on which
they're being read (and of the machine on which they were captured, but
I have the impression they're bit-swapped on most platforms), and allows
us to, if, as, and when we implement packet capture in Wiretap, mark
packets in a capture file written in Wiretap-native format based on the
machine on which they are captured (assuming the rule "Ultrix, Alpha,
and BSD/OS are the only platforms that don't bit-swap", or some other
compile-time rule, gets the right answer, or that some platform has
drivers that can tell us whether the addresses are bit-swapped).

(NOTE: if, for any of the capture file formats used only on one
platform, FDDI MAC addresses aren't bit-swapped, the code to read that
capture file format should be fixed to flag them as not bit-swapped.)

Use the encapsulation type to decide whether to bit-swap addresses in
"dissect_fddi()".

svn path=/trunk/; revision=557

1 files changed, 2 insertions, 1 deletions

diff --git a/capture.c b/capture.c
index 4c9365e550..a367e04440 100644
--- a/capture.c
+++ b/capture.c
@@ -1,7 +1,7 @@
 /* capture.c
  * Routines for packet capture windows
  *
- * $Id: capture.c,v 1.60 1999/08/22 02:29:30 guy Exp $
+ * $Id: capture.c,v 1.61 1999/08/24 03:19:21 guy Exp $
  *
  * Ethereal - Network traffic analyzer
  * By Gerald Combs <gerald@zing.org>
@@ -824,6 +824,7 @@ capture_pcap_cb(u_char *user, const struct pcap_pkthdr *phdr,
       capture_eth(pd, phdr->caplen, &ld->counts);
       break;
     case WTAP_ENCAP_FDDI:
+    case WTAP_ENCAP_FDDI_BITSWAPPED:
       capture_fddi(pd, phdr->caplen, &ld->counts);
       break;
     case WTAP_ENCAP_TR: