forked from osmocom/wireshark
97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/* packet-time.c
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* Routines for time packet dissection
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*
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* Richard Sharpe <rsharpe@ns.aus.com>
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*
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* $Id: packet-time.c,v 1.14 2001/06/18 02:17:53 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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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 "packet.h"
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static int proto_time = -1;
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static int hf_time_time = -1;
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static gint ett_time = -1;
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#define UDP_PORT_TIME 37
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static void
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dissect_time(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_tree *time_tree;
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proto_item *ti;
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if (check_col(pinfo->fd, COL_PROTOCOL))
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col_set_str(pinfo->fd, COL_PROTOCOL, "TIME");
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if (check_col(pinfo->fd, COL_INFO)) {
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col_add_fstr(pinfo->fd, COL_INFO, "TIME %s",
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pinfo->srcport == pinfo->match_port ? "Response":"Request");
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}
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if (tree) {
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ti = proto_tree_add_item(tree, proto_time, tvb, 0,
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tvb_length(tvb), FALSE);
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time_tree = proto_item_add_subtree(ti, ett_time);
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proto_tree_add_text(time_tree, tvb, 0, 0,
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pinfo->srcport==UDP_PORT_TIME? "Type: Response":"Type: Request");
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if (pinfo->srcport == UDP_PORT_TIME) {
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guint32 delta_seconds = tvb_get_ntohl(tvb, 0);
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proto_tree_add_text(time_tree, tvb, 0, 4,
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"%u seconds since midnight 1 January 1900 GMT",
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delta_seconds);
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}
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}
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}
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void
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proto_register_time(void)
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{
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static hf_register_info hf[] = {
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{ &hf_time_time,
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{ "Time", "time.time",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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"Seconds since 00:00 (midnight) 1 January 1900 GMT", HFILL }}
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};
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static gint *ett[] = {
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&ett_time,
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};
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proto_time = proto_register_protocol("Time Protocol", "TIME", "time");
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proto_register_field_array(proto_time, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_time(void)
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{
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dissector_add("udp.port", UDP_PORT_TIME, dissect_time, proto_time);
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}
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