2 * Routines for Time Protocol (RFC 868) packet dissection
4 * Richard Sharpe <rsharpe@ns.aus.com>
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 1998 Gerald Combs
12 * Copied from packet-tftp.c
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * as published by the Free Software Foundation; either version 2
17 * of the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
33 #include <epan/packet.h>
35 static int proto_time = -1;
36 static int hf_time_time = -1;
38 static gint ett_time = -1;
40 /* This dissector works for TCP and UDP time packets */
44 dissect_time(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
46 proto_tree *time_tree;
49 if (check_col(pinfo->cinfo, COL_PROTOCOL))
50 col_set_str(pinfo->cinfo, COL_PROTOCOL, "TIME");
52 if (check_col(pinfo->cinfo, COL_INFO)) {
53 col_add_fstr(pinfo->cinfo, COL_INFO, "TIME %s",
54 pinfo->srcport == pinfo->match_port ? "Response":"Request");
59 ti = proto_tree_add_item(tree, proto_time, tvb, 0, -1, FALSE);
60 time_tree = proto_item_add_subtree(ti, ett_time);
62 proto_tree_add_text(time_tree, tvb, 0, 0,
63 pinfo->srcport==TIME_PORT ? "Type: Response":"Type: Request");
64 if (pinfo->srcport == TIME_PORT) {
65 /* seconds since 1900-01-01 00:00:00 GMT, *not* 1970 */
66 guint32 delta_seconds = tvb_get_ntohl(tvb, 0);
67 proto_tree_add_uint_format(time_tree, hf_time_time, tvb, 0, 4,
69 abs_time_secs_to_str(delta_seconds-2208988800U));
75 proto_register_time(void)
78 static hf_register_info hf[] = {
80 { "Time", "time.time",
81 FT_UINT32, BASE_DEC, NULL, 0x0,
82 "Seconds since 00:00 (midnight) 1 January 1900 GMT", HFILL }}
84 static gint *ett[] = {
88 proto_time = proto_register_protocol("Time Protocol", "TIME", "time");
89 proto_register_field_array(proto_time, hf, array_length(hf));
90 proto_register_subtree_array(ett, array_length(ett));
94 proto_reg_handoff_time(void)
96 dissector_handle_t time_handle;
98 time_handle = create_dissector_handle(dissect_time, proto_time);
99 dissector_add("udp.port", TIME_PORT, time_handle);
100 dissector_add("tcp.port", TIME_PORT, time_handle);