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wireshark/packet-tsp.c

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/* packet-quake.c
* Routines for Time Synchronization Protocol (TSP) packet dissection
*
* Uwe Girlich <Uwe.Girlich@philosys.de>
*
* $Id: packet-tsp.c,v 1.4 2003/06/11 20:41:45 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* Copied from packet-quake.c
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glib.h>
#include <epan/packet.h>
/*
* For a full documentation of the Time Synchronization Protocol (TSP) see:
* http://docs.freebsd.org/44doc/smm/12.timed/paper.pdf
*/
static int proto_tsp = -1;
static int hf_tsp_type = -1;
static int hf_tsp_vers = -1;
static int hf_tsp_seq = -1;
static int hf_tsp_hopcnt = -1;
static int hf_tsp_time_sec = -1;
static int hf_tsp_time_usec = -1;
static int hf_tsp_name = -1;
static gint ett_tsp = -1;
static dissector_handle_t tsp_handle;
/* timed port from /etc/services */
#define UDP_PORT_TIMED 525
static const value_string names_tsp_type[] = {
#define TSP_ANY 0 /* match any types */
{ TSP_ANY, "any" },
#define TSP_ADJTIME 1 /* send adjtime */
{ TSP_ADJTIME, "adjtime" },
#define TSP_ACK 2 /* generic acknowledgement */
{ TSP_ACK, "ack" },
#define TSP_MASTERREQ 3 /* ask for master's name */
{ TSP_MASTERREQ, "masterreq" },
#define TSP_MASTERACK 4 /* acknowledge master request */
{ TSP_MASTERACK, "masterack" },
#define TSP_SETTIME 5 /* send network time */
{ TSP_SETTIME, "settime" },
#define TSP_MASTERUP 6 /* inform slaves that master is up */
{ TSP_MASTERUP, "masterup" },
#define TSP_SLAVEUP 7 /* slave is up but not polled */
{ TSP_SLAVEUP, "slaveup" },
#define TSP_ELECTION 8 /* advance candidature for master */
{ TSP_ELECTION, "election" },
#define TSP_ACCEPT 9 /* support candidature of master */
{ TSP_ACCEPT, "accept" },
#define TSP_REFUSE 10 /* reject candidature of master */
{ TSP_REFUSE, "refuse" },
#define TSP_CONFLICT 11 /* two or more masters present */
{ TSP_CONFLICT, "conflict" },
#define TSP_RESOLVE 12 /* masters' conflict resolution */
{ TSP_RESOLVE, "resolve" },
#define TSP_QUIT 13 /* reject candidature if master is up */
{ TSP_QUIT, "quit" },
#define TSP_DATE 14 /* reset the time (date command) */
{ TSP_DATE, "date" },
#define TSP_DATEREQ 15 /* remote request to reset the time */
{ TSP_DATEREQ, "datereq" },
#define TSP_DATEACK 16 /* acknowledge time setting */
{ TSP_DATEACK, "dateack" },
#define TSP_TRACEON 17 /* turn tracing on */
{ TSP_TRACEON, "traceon" },
#define TSP_TRACEOFF 18 /* turn tracing off */
{ TSP_TRACEOFF, "traceoff" },
#define TSP_MSITE 19 /* find out master's site */
{ TSP_MSITE, "msite" },
#define TSP_MSITEREQ 20 /* remote master's site request */
{ TSP_MSITEREQ, "msitereq" },
#define TSP_TEST 21 /* for testing election algo */
{ TSP_TEST, "test" },
#define TSP_SETDATE 22 /* New from date command */
{ TSP_SETDATE, "setdate" },
#define TSP_SETDATEREQ 23 /* New remote for above */
{ TSP_SETDATEREQ, "setdatereq" },
#define TSP_LOOP 24 /* loop detection packet */
{ TSP_LOOP, "loop" },
{ 0, NULL }
};
static void
dissect_tsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *tsp_tree = NULL;
proto_item *tsp_item = NULL;
guint8 tsp_type;
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "TSP");
if (check_col(pinfo->cinfo, COL_INFO))
col_clear(pinfo->cinfo, COL_INFO);
tsp_type = tvb_get_guint8(tvb, 0);
if (check_col(pinfo->cinfo, COL_INFO))
col_add_str(pinfo->cinfo, COL_INFO,
val_to_str(tsp_type, names_tsp_type, "Unknown message type (%u)"));
if (tree) {
tsp_item = proto_tree_add_item(tree, proto_tsp,
tvb, 0, -1, FALSE);
if (tsp_item)
tsp_tree = proto_item_add_subtree(tsp_item, ett_tsp);
}
if (tsp_tree) {
proto_tree_add_uint(tsp_tree, hf_tsp_type,
tvb, 0, 1, tsp_type);
proto_tree_add_item(tsp_tree, hf_tsp_vers,
tvb, 1, 1, FALSE);
proto_tree_add_item(tsp_tree, hf_tsp_seq,
tvb, 2, 2, FALSE);
}
switch (tsp_type) {
case TSP_LOOP:
if (tsp_tree)
proto_tree_add_item(tsp_tree, hf_tsp_hopcnt,
tvb, 4, 1, FALSE);
break;
case TSP_SETTIME:
case TSP_ADJTIME:
case TSP_SETDATE:
case TSP_SETDATEREQ:
if (tsp_tree) {
proto_tree_add_item(tsp_tree, hf_tsp_time_sec,
tvb, 4, 4, FALSE);
proto_tree_add_item(tsp_tree, hf_tsp_time_usec,
tvb, 8, 4, FALSE);
}
break;
}
if (tsp_tree) {
proto_tree_add_item(tsp_tree, hf_tsp_name, tvb, 12,
-1, FALSE);
}
}
void
proto_reg_handoff_tsp(void)
{
dissector_add("udp.port", UDP_PORT_TIMED, tsp_handle);
}
void
proto_register_tsp(void)
{
static hf_register_info hf[] = {
{ &hf_tsp_type,
{ "Type", "tsp.type",
FT_UINT8, BASE_DEC, VALS(names_tsp_type), 0x0,
"Packet Type", HFILL }},
{ &hf_tsp_vers,
{ "Version", "tsp.version",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Protocol Version Number", HFILL }},
{ &hf_tsp_seq,
{ "Sequence", "tsp.sequence",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Sequence Number", HFILL }},
{ &hf_tsp_hopcnt,
{ "Hop Count", "tsp.hopcnt",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Hop Count", HFILL }},
{ &hf_tsp_time_sec,
{ "Seconds", "tsp.sec",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Seconds", HFILL }},
{ &hf_tsp_time_usec,
{ "Microseconds", "tsp.usec",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Microseconds", HFILL }},
{ &hf_tsp_name,
{ "Machine Name", "tsp.name",
FT_STRINGZ, BASE_DEC, NULL, 0x0,
"Sender Machine Name", HFILL }}
};
static gint *ett[] = {
&ett_tsp
};
proto_tsp = proto_register_protocol("Time Synchronization Protocol",
"TSP", "tsp");
proto_register_field_array(proto_tsp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
tsp_handle = create_dissector_handle(dissect_tsp, proto_tsp);
}
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