Add the "Edit:Protocols..." feature which currently only implements

the following:

It is now possible to enable/disable a particular protocol decoding
(i.e. the protocol dissector is void or not). When a protocol
is disabled, it is displayed as Data and of course, all linked
sub-protocols are disabled as well.

Disabling a protocol could be interesting:

- in case of buggy dissectors
- in case of wrong heuristics
- for performance reasons
- to decode the data as another protocol (TODO)

Currently (if I am not wrong), all dissectors but NFS can be disabled
(and dissectors that do not register protocols :-)

I do not like the way the RPC sub-dissectors are disabled (in the
sub-dissectors) since this could be done in the RPC dissector itself,
knowing the sub-protocol hfinfo entry (this is why, I've not modified
the NFS one yet).

Two functions are added in proto.c :

gboolean proto_is_protocol_enabled(int n);
void proto_set_decoding(int n, gboolean enabled);

and two MACROs which can be used in dissectors:

OLD_CHECK_DISPLAY_AS_DATA(index, pd, offset, fd, tree)
CHECK_DISPLAY_AS_DATA(index, tvb, pinfo, tree)

See also the XXX in proto_dlg.c and proto.c around the new functions.

svn path=/trunk/; revision=2267

1 files changed, 3 insertions, 1 deletions

diff --git a/packet-tftp.c b/packet-tftp.c
index e7d368ae1c..8c62d50183 100644
--- a/packet-tftp.c
+++ b/packet-tftp.c
@@ -5,7 +5,7 @@
  * Craig Newell <CraigN@cheque.uq.edu.au>
  *	RFC2347 TFTP Option Extension
  *
- * $Id: packet-tftp.c,v 1.12 2000/05/31 05:07:50 guy Exp $
+ * $Id: packet-tftp.c,v 1.13 2000/08/13 14:09:05 deniel Exp $
  *
  * Ethereal - Network traffic analyzer
  * By Gerald Combs <gerald@zing.org>
@@ -85,6 +85,8 @@ dissect_tftp(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
 	proto_item	*ti;
 	u_int           i1;
 
+	OLD_CHECK_DISPLAY_AS_DATA(proto_tftp, pd, offset, fd, tree);
+
 	if (check_col(fd, COL_PROTOCOL))
 		col_add_str(fd, COL_PROTOCOL, "TFTP");