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 #define UDP_PORT_TIME 37
43 dissect_time(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
45 proto_tree *time_tree;
48 if (check_col(pinfo->cinfo, COL_PROTOCOL))
49 col_set_str(pinfo->cinfo, COL_PROTOCOL, "TIME");
51 if (check_col(pinfo->cinfo, COL_INFO)) {
52 col_add_fstr(pinfo->cinfo, COL_INFO, "TIME %s",
53 pinfo->srcport == pinfo->match_port ? "Response":"Request");
58 ti = proto_tree_add_item(tree, proto_time, tvb, 0, -1, FALSE);
59 time_tree = proto_item_add_subtree(ti, ett_time);
61 proto_tree_add_text(time_tree, tvb, 0, 0,
62 pinfo->srcport==UDP_PORT_TIME? "Type: Response":"Type: Request");
63 if (pinfo->srcport == UDP_PORT_TIME) {
64 /* seconds since 1900-01-01 00:00:00 GMT, *not* 1970 */
65 guint32 delta_seconds = tvb_get_ntohl(tvb, 0);
66 proto_tree_add_uint_format(time_tree, hf_time_time, tvb, 0, 4,
68 abs_time_secs_to_str(delta_seconds-2208988800U));
74 proto_register_time(void)
77 static hf_register_info hf[] = {
79 { "Time", "time.time",
80 FT_UINT32, BASE_DEC, NULL, 0x0,
81 "Seconds since 00:00 (midnight) 1 January 1900 GMT", HFILL }}
83 static gint *ett[] = {
87 proto_time = proto_register_protocol("Time Protocol", "TIME", "time");
88 proto_register_field_array(proto_time, hf, array_length(hf));
89 proto_register_subtree_array(ett, array_length(ett));
93 proto_reg_handoff_time(void)
95 dissector_handle_t time_handle;
97 time_handle = create_dissector_handle(dissect_time, proto_time);
98 dissector_add("udp.port", UDP_PORT_TIME, time_handle);