forked from osmocom/wireshark
2eb7b05b8c
Similar to the "tcp.port" changes in I99604f95d426ad345f4b494598d94178b886eb67, convert dissectors that use "udp.port". More cleanup done on dissectors that use both TCP and UDP dissector tables, so that less preference callbacks exist. Change-Id: If07be9b9e850c244336a7069599cd554ce312dd3 Reviewed-on: https://code.wireshark.org/review/18120 Petri-Dish: Michael Mann <mmann78@netscape.net> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Michael Mann <mmann78@netscape.net>
140 lines
4.4 KiB
C
140 lines
4.4 KiB
C
/* packet-time.c
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* Routines for Time Protocol (RFC 868) packet dissection
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*
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* Richard Sharpe <rsharpe@ns.aus.com>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/prefs.h>
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#include <epan/to_str.h>
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void proto_reg_handoff_time(void);
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void proto_register_time(void);
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static const enum_val_t time_display_types[] = {
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{ "UTC", "UTC", ABSOLUTE_TIME_UTC },
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{ "Local", "Local", ABSOLUTE_TIME_LOCAL},
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{ NULL, NULL, 0 }
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};
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static int proto_time = -1;
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static int hf_time_time = -1;
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static int hf_time_response = -1;
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static gint ett_time = -1;
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/* Instead of using absolute_time_display_e as the type for
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* time_display_type, we use gint to avoid a type-punning problem
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* with prefs_register_enum_preference(). This variable is also
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* used with abs_time_secs_to_ep_str(), which _does_ take
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* an absolute_time_display_e, but gcc doesn't complain about
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* casting the gint to absolute_time_display_e */
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static gint time_display_type = ABSOLUTE_TIME_LOCAL;
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/* This dissector works for TCP and UDP time packets */
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#define TIME_PORT 37
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static int
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dissect_time(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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proto_tree *time_tree;
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proto_item *ti;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "TIME");
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col_add_fstr(pinfo->cinfo, COL_INFO, "TIME %s",
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pinfo->srcport == pinfo->match_uint ? "Response":"Request");
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ti = proto_tree_add_item(tree, proto_time, tvb, 0, -1, ENC_NA);
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time_tree = proto_item_add_subtree(ti, ett_time);
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proto_tree_add_boolean(time_tree, hf_time_response, tvb, 0, 0, pinfo->srcport==pinfo->match_uint);
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if (pinfo->srcport == pinfo->match_uint) {
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/* seconds since 1900-01-01 00:00:00 GMT, *not* 1970 */
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guint32 delta_seconds = tvb_get_ntohl(tvb, 0);
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proto_tree_add_uint_format(time_tree, hf_time_time, tvb, 0, 4,
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delta_seconds, "%s",
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abs_time_secs_to_str(wmem_packet_scope(), delta_seconds-2208988800U,
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(absolute_time_display_e)time_display_type, TRUE));
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}
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return tvb_captured_length(tvb);
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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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{ &hf_time_response,
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{ "Type", "time.response",
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FT_BOOLEAN, BASE_NONE, TFS(&tfs_response_request), 0x0,
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"Response or Request", 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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module_t *time_pref ;
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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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time_pref = prefs_register_protocol(proto_time, NULL);
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prefs_register_enum_preference(time_pref,
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"display_time_type",
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"Time Display",
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"Time display type",
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(gint *)&time_display_type,
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time_display_types,
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FALSE);
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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_handle_t time_handle;
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time_handle = create_dissector_handle(dissect_time, proto_time);
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dissector_add_uint_with_preference("udp.port", TIME_PORT, time_handle);
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dissector_add_uint_with_preference("tcp.port", TIME_PORT, time_handle);
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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