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, 5 insertions, 2 deletions

diff --git a/packet.c b/packet.c
index 0fbb99714d..f4fad5d693 100644
--- a/packet.c
+++ b/packet.c
@@ -1,7 +1,7 @@
 /* packet.c
  * Routines for packet disassembly
  *
- * $Id: packet.c,v 1.39 1999/08/22 00:47:45 guy Exp $
+ * $Id: packet.c,v 1.40 1999/08/24 03:19:23 guy Exp $
  *
  * Ethereal - Network traffic analyzer
  * By Gerald Combs <gerald@zing.org>
@@ -658,7 +658,10 @@ dissect_packet(const u_char *pd, frame_data *fd, proto_tree *tree)
 			dissect_eth(pd, 0, fd, tree);
 			break;
 		case WTAP_ENCAP_FDDI :
-			dissect_fddi(pd, fd, tree);
+			dissect_fddi(pd, fd, tree, FALSE);
+			break;
+		case WTAP_ENCAP_FDDI_BITSWAPPED :
+			dissect_fddi(pd, fd, tree, TRUE);
 			break;
 		case WTAP_ENCAP_TR :
 			dissect_tr(pd, 0, fd, tree);