epan/dissectors/packet-dvb-tdt.c

   1 /* packet-dvb-tdt.c
   2  * Routines for DVB (ETSI EN 300 468) Time and Date Table (TDT) dissection
   3  * Copyright 2012, Guy Martin <gmsoft@tuxicoman.be>
   4  *
   5  * Wireshark - Network traffic analyzer
   6  * By Gerald Combs <gerald@wireshark.org>
   7  * Copyright 1998 Gerald Combs
   8  *
   9  * SPDX-License-Identifier: GPL-2.0-or-later
  10  */
  11
  12 #include "config.h"
  13
  14 #include <epan/packet.h>
  15 #include "packet-mpeg-sect.h"
  16
  17 void proto_register_dvb_tdt(void);
  18 void proto_reg_handoff_dvb_tdt(void);
  19
  20 static dissector_handle_t dvb_tdt_handle;
  21
  22 static int proto_dvb_tdt;
  23 static int hf_dvb_tdt_utc_time;
  24
  25 static int ett_dvb_tdt;
  26
  27 static int
  28 dissect_dvb_tdt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
  29 {
  30     unsigned offset = 0;
  31
  32     proto_item *ti;
  33     proto_tree *dvb_tdt_tree;
  34
  35     nstime_t    utc_time;
  36
  37     col_set_str(pinfo->cinfo, COL_INFO, "Time and Date Table (TDT)");
  38
  39     ti = proto_tree_add_item(tree, proto_dvb_tdt, tvb, offset, -1, ENC_NA);
  40     dvb_tdt_tree = proto_item_add_subtree(ti, ett_dvb_tdt);
  41
  42     offset += packet_mpeg_sect_header(tvb, offset, dvb_tdt_tree, NULL, NULL);
  43
  44     if (packet_mpeg_sect_mjd_to_utc_time(tvb, offset, &utc_time) < 0) {
  45         proto_tree_add_time_format(dvb_tdt_tree, hf_dvb_tdt_utc_time, tvb, offset, 5, &utc_time, "Unparseable time");
  46     } else {
  47         proto_tree_add_time(dvb_tdt_tree, hf_dvb_tdt_utc_time, tvb, offset, 5, &utc_time);
  48     }
  49     offset += 5;
  50
  51     proto_item_set_len(ti, offset);
  52     return tvb_captured_length(tvb);
  53 }
  54
  55
  56 void
  57 proto_register_dvb_tdt(void)
  58 {
  59
  60     static hf_register_info hf[] = {
  61
  62         { &hf_dvb_tdt_utc_time, {
  63             "UTC Time", "dvb_tdt.utc_time",
  64             FT_ABSOLUTE_TIME, ABSOLUTE_TIME_UTC, NULL, 0, NULL, HFILL
  65         } }
  66     };
  67
  68     static int *ett[] = {
  69         &ett_dvb_tdt
  70     };
  71
  72     proto_dvb_tdt = proto_register_protocol("DVB Time and Date Table", "DVB TDT", "dvb_tdt");
  73
  74     proto_register_field_array(proto_dvb_tdt, hf, array_length(hf));
  75     proto_register_subtree_array(ett, array_length(ett));
  76
  77     dvb_tdt_handle = register_dissector("dvb_tdt", dissect_dvb_tdt, proto_dvb_tdt);
  78 }
  79
  80
  81 void proto_reg_handoff_dvb_tdt(void)
  82 {
  83     dissector_add_uint("mpeg_sect.tid", DVB_TDT_TID, dvb_tdt_handle);
  84 }
  85
  86 /*
  87  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
  88  *
  89  * Local variables:
  90  * c-basic-offset: 4
  91  * tab-width: 8
  92  * indent-tabs-mode: nil
  93  * End:
  94  *
  95  * vi: set shiftwidth=4 tabstop=8 expandtab:
  96  * :indentSize=4:tabSize=8:noTabs=true:
  97  */