1999-12-03 21:50:31 +00:00
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/* packet-tacacs.c
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* Routines for cisco tacacs/tacplus/AAA packet dissection
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*
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2001-02-28 10:28:55 +00:00
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* $Id: packet-tacacs.c,v 1.11 2001/02/28 10:28:55 guy Exp $
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1999-12-03 21:50:31 +00:00
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*
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* Ethereal - Network traffic analyzer
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2000-01-07 22:05:43 +00:00
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* By Gerald Combs <gerald@zing.org>
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1999-12-03 21:50:31 +00:00
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* Copyright 1998 Gerald Combs
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*
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* Copied from packet-tftp.c
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#include <string.h>
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#include <glib.h>
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#include "packet.h"
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static int proto_tacacs = -1;
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static int hf_tacacs_request = -1;
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static int hf_tacacs_response = -1;
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static int hf_tacacs_version = -1;
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static gint ett_tacacs = -1;
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2000-04-08 07:07:42 +00:00
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#define UDP_PORT_TACACS 49
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#define TCP_PORT_TACACS 49
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static void
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2001-02-28 10:28:55 +00:00
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dissect_tacacs(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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1999-12-03 21:50:31 +00:00
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{
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proto_tree *tacacs_tree, *ti;
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2001-02-28 10:28:55 +00:00
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if (check_col(pinfo->fd, COL_PROTOCOL))
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col_set_str(pinfo->fd, COL_PROTOCOL, "TACACS");
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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
2000-08-13 14:09:15 +00:00
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2001-02-28 10:28:55 +00:00
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if (check_col(pinfo->fd, COL_INFO))
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1999-12-03 21:50:31 +00:00
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{
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2001-02-28 10:28:55 +00:00
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col_add_str(pinfo->fd, COL_INFO,
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(pinfo->match_port == pinfo->destport) ? "Request" : "Response");
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1999-12-03 21:50:31 +00:00
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}
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if (tree)
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{
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2001-02-28 10:28:55 +00:00
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ti = proto_tree_add_item(tree, proto_tacacs, tvb, 0,
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tvb_length(tvb), FALSE);
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1999-12-03 21:50:31 +00:00
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tacacs_tree = proto_item_add_subtree(ti, ett_tacacs);
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2001-02-28 10:28:55 +00:00
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proto_tree_add_string(tacacs_tree, hf_tacacs_version, tvb,
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0, 0, "XTacacs");
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1999-12-03 21:50:31 +00:00
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2001-02-28 10:28:55 +00:00
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if (pinfo->match_port == pinfo->destport)
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1999-12-03 21:50:31 +00:00
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{
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2001-02-28 10:28:55 +00:00
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proto_tree_add_boolean_hidden(tacacs_tree, hf_tacacs_request, tvb,
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0, tvb_length(tvb), TRUE);
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proto_tree_add_text(tacacs_tree, tvb, 0,
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tvb_length(tvb), "Request: <opaque data>" );
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1999-12-03 21:50:31 +00:00
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}
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else
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{
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2001-02-28 10:28:55 +00:00
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proto_tree_add_boolean_hidden(tacacs_tree, hf_tacacs_response, tvb,
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0, tvb_length(tvb), TRUE);
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proto_tree_add_text(tacacs_tree, tvb, 0,
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tvb_length(tvb), "Response: <opaque data>");
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1999-12-03 21:50:31 +00:00
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}
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}
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}
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2000-04-08 07:07:42 +00:00
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static void
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2001-02-28 10:28:55 +00:00
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dissect_tacplus(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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1999-12-03 21:50:31 +00:00
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{
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proto_tree *tacacs_tree, *ti;
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2001-02-28 10:28:55 +00:00
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if (check_col(pinfo->fd, COL_PROTOCOL))
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col_set_str(pinfo->fd, COL_PROTOCOL, "TACACS");
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1999-12-03 21:50:31 +00:00
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2001-02-28 10:28:55 +00:00
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if (check_col(pinfo->fd, COL_INFO))
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1999-12-03 21:50:31 +00:00
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{
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2001-02-28 10:28:55 +00:00
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col_add_str(pinfo->fd, COL_INFO,
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(pinfo->match_port == pinfo->destport) ? "Request" : "Response");
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1999-12-03 21:50:31 +00:00
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}
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if (tree)
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{
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2001-02-28 10:28:55 +00:00
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ti = proto_tree_add_item(tree, proto_tacacs, tvb, 0,
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tvb_length(tvb), FALSE);
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1999-12-03 21:50:31 +00:00
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tacacs_tree = proto_item_add_subtree(ti, ett_tacacs);
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2001-02-28 10:28:55 +00:00
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proto_tree_add_string(tacacs_tree, hf_tacacs_version, tvb, 0, 0, "Tacacs+");
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1999-12-03 21:50:31 +00:00
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2001-02-28 10:28:55 +00:00
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if (pinfo->match_port == pinfo->destport)
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1999-12-03 21:50:31 +00:00
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{
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2001-02-28 10:28:55 +00:00
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proto_tree_add_boolean_hidden(tacacs_tree, hf_tacacs_request, tvb,
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0, tvb_length(tvb), TRUE);
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proto_tree_add_text(tacacs_tree, tvb, 0,
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tvb_length(tvb), "Request: <opaque data>" );
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1999-12-03 21:50:31 +00:00
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}
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else
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{
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2001-02-28 10:28:55 +00:00
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proto_tree_add_boolean_hidden(tacacs_tree, hf_tacacs_response, tvb,
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0, tvb_length(tvb), TRUE);
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proto_tree_add_text(tacacs_tree, tvb, 0,
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tvb_length(tvb), "Response: <opaque data>");
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1999-12-03 21:50:31 +00:00
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}
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}
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}
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void
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proto_register_tacacs(void)
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{
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static hf_register_info hf[] = {
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{ &hf_tacacs_version,
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{ "Tacacs Version", "tacacs.version",
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FT_STRING, BASE_NONE, NULL, 0x0,
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"xtacacs or tacplus" }},
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{ &hf_tacacs_response,
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{ "Response", "tacacs.response",
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FT_BOOLEAN, BASE_NONE, NULL, 0x0,
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"TRUE if TACACS response" }},
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{ &hf_tacacs_request,
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{ "Request", "tacacs.request",
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FT_BOOLEAN, BASE_NONE, NULL, 0x0,
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"TRUE if TACACS request" }}
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};
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static gint *ett[] = {
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&ett_tacacs,
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};
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2001-01-03 06:56:03 +00:00
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proto_tacacs = proto_register_protocol("TACACS", "TACACS", "tacacs");
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1999-12-03 21:50:31 +00:00
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proto_register_field_array(proto_tacacs, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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2000-04-08 07:07:42 +00:00
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void
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proto_reg_handoff_tacacs(void)
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{
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2001-02-28 10:28:55 +00:00
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dissector_add("udp.port", UDP_PORT_TACACS, dissect_tacacs,
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2001-01-09 06:32:10 +00:00
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proto_tacacs);
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2001-02-28 10:28:55 +00:00
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dissector_add("tcp.port", TCP_PORT_TACACS, dissect_tacplus,
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2001-01-09 06:32:10 +00:00
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proto_tacacs);
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2000-04-08 07:07:42 +00:00
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}
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