epan/dissectors/packet-dvb-bat.c

   1 /* packet-dvb-bat.c
   2  * Routines for DVB (ETSI EN 300 468) Bouquet Association Table (BAT) dissection
   3  * Copyright 2012, Guy Martin <gmsoft@tuxicoman.be>
   4  *
   5  * $Id$
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License along
  22  * with this program; if not, write to the Free Software Foundation, Inc.,
  23  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  24  */
  25
  26 #include "config.h"
  27
  28 #include <glib.h>
  29
  30 #include <epan/packet.h>
  31 #include <epan/dissectors/packet-mpeg-sect.h>
  32
  33 #include "packet-mpeg-descriptor.h"
  34
  35 void proto_register_dvb_bat(void);
  36 void proto_reg_handoff_dvb_bat(void);
  37
  38 static int proto_dvb_bat = -1;
  39 static int hf_dvb_bat_bouquet_id = -1;
  40 static int hf_dvb_bat_reserved1 = -1;
  41 static int hf_dvb_bat_version_number = -1;
  42 static int hf_dvb_bat_current_next_indicator = -1;
  43 static int hf_dvb_bat_section_number = -1;
  44 static int hf_dvb_bat_last_section_number = -1;
  45
  46 static int hf_dvb_bat_reserved2 = -1;
  47 static int hf_dvb_bat_bouquet_descriptors_length = -1;
  48
  49 static int hf_dvb_bat_reserved3 = -1;
  50 static int hf_dvb_bat_transport_stream_loop_length = -1;
  51
  52 static int hf_dvb_bat_transport_stream_id = -1;
  53 static int hf_dvb_bat_original_network_id = -1;
  54 static int hf_dvb_bat_reserved4 = -1;
  55 static int hf_dvb_bat_transport_descriptors_length = -1;
  56
  57 static gint ett_dvb_bat = -1;
  58 static gint ett_dvb_bat_transport_stream = -1;
  59
  60
  61 #define DVB_BAT_TID                                 0x4A
  62
  63 #define DVB_BAT_RESERVED1_MASK                      0xC0
  64 #define DVB_BAT_VERSION_NUMBER_MASK                 0x3E
  65 #define DVB_BAT_CURRENT_NEXT_INDICATOR_MASK         0x01
  66
  67 #define DVB_BAT_RESERVED2_MASK                    0xF000
  68 #define DVB_BAT_BOUQUET_DESCRIPTORS_LENGTH_MASK   0x0FFF
  69
  70 #define DVB_BAT_RESERVED3_MASK                    0xF000
  71 #define DVB_BAT_TRANSPORT_STREAM_LOOP_LENGTH_MASK 0x0FFF
  72
  73 #define DVB_BAT_RESERVED4_MASK                    0xF000
  74 #define DVB_BAT_TRANSPORT_DESCRIPTORS_LENGTH_MASK 0x0FFF
  75
  76 static const value_string dvb_bat_cur_next_vals[] = {
  77     { 0, "Not yet applicable" },
  78     { 1, "Currently applicable" },
  79
  80     { 0, NULL }
  81 };
  82
  83 #if 0
  84 static const value_string dvb_bat_running_status_vals[] = {
  85     { 0, "Undefined" },
  86     { 1, "Not Running" },
  87     { 2, "Starts in a few seconds" },
  88     { 3, "Pausing" },
  89     { 4, "Running" },
  90     { 5, "Service off-air" },
  91
  92     { 0, NULL }
  93 };
  94
  95 static const value_string dvb_bat_free_ca_mode_vals[] = {
  96     { 0, "Not Scrambled" },
  97     { 1, "One or more component scrambled" },
  98
  99     { 0, NULL }
 100 };
 101 #endif
 102
 103 static void
 104 dissect_dvb_bat(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 105 {
 106
 107     guint   offset = 0, length = 0, ts_loop_end;
 108     guint16 ts_id, descriptor_len, ts_loop_len;
 109
 110     proto_item *ti;
 111     proto_tree *dvb_bat_tree;
 112     proto_item *tsi;
 113     proto_tree *transport_stream_tree;
 114
 115     col_set_str(pinfo->cinfo, COL_INFO, "Bouquet Association Table (BAT)");
 116
 117     ti = proto_tree_add_item(tree, proto_dvb_bat,                              tvb, offset, -1, ENC_NA);
 118     dvb_bat_tree = proto_item_add_subtree(ti, ett_dvb_bat);
 119
 120     offset += packet_mpeg_sect_header(tvb, offset, dvb_bat_tree, &length, NULL);
 121     length -= 4;
 122
 123     proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_bouquet_id,                   tvb, offset, 2, ENC_BIG_ENDIAN);
 124     offset += 2;
 125
 126     proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_reserved1,                    tvb, offset, 1, ENC_BIG_ENDIAN);
 127     proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_version_number,               tvb, offset, 1, ENC_BIG_ENDIAN);
 128     proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_current_next_indicator,       tvb, offset, 1, ENC_BIG_ENDIAN);
 129     offset += 1;
 130
 131     proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_section_number,               tvb, offset, 1, ENC_BIG_ENDIAN);
 132     offset += 1;
 133
 134     proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_last_section_number,          tvb, offset, 1, ENC_BIG_ENDIAN);
 135     offset += 1;
 136
 137     descriptor_len = tvb_get_ntohs(tvb, offset) & DVB_BAT_BOUQUET_DESCRIPTORS_LENGTH_MASK;
 138     proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_reserved2,                    tvb, offset, 2, ENC_BIG_ENDIAN);
 139     proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_bouquet_descriptors_length,   tvb, offset, 2, ENC_BIG_ENDIAN);
 140     offset += 2;
 141
 142     offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, descriptor_len, dvb_bat_tree);
 143
 144     ts_loop_len = tvb_get_ntohs(tvb, offset) & DVB_BAT_TRANSPORT_STREAM_LOOP_LENGTH_MASK;
 145     proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_reserved3,                    tvb, offset, 2, ENC_BIG_ENDIAN);
 146     proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_transport_stream_loop_length, tvb, offset, 2, ENC_BIG_ENDIAN);
 147     offset += 2;
 148
 149     ts_loop_end = offset + ts_loop_len;
 150     while (offset < ts_loop_end) {
 151         ts_id = tvb_get_ntohs(tvb, offset);
 152         descriptor_len = tvb_get_ntohs(tvb, offset + 4) & DVB_BAT_TRANSPORT_DESCRIPTORS_LENGTH_MASK;
 153
 154         tsi = proto_tree_add_text(dvb_bat_tree, tvb, offset, 6 + descriptor_len, "Transport Stream 0x%04x", ts_id);
 155         transport_stream_tree = proto_item_add_subtree(tsi, ett_dvb_bat_transport_stream);
 156
 157         proto_tree_add_item(transport_stream_tree, hf_dvb_bat_transport_stream_id, tvb, offset, 2, ENC_BIG_ENDIAN);
 158         offset += 2;
 159
 160         proto_tree_add_item(transport_stream_tree, hf_dvb_bat_original_network_id, tvb, offset, 2, ENC_BIG_ENDIAN);
 161         offset += 2;
 162
 163         proto_tree_add_item(transport_stream_tree, hf_dvb_bat_reserved4, tvb, offset, 2, ENC_BIG_ENDIAN);
 164         proto_tree_add_item(transport_stream_tree, hf_dvb_bat_transport_descriptors_length, tvb, offset, 2, ENC_BIG_ENDIAN);
 165         offset += 2;
 166
 167         offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, descriptor_len, transport_stream_tree);
 168     }
 169
 170     offset += packet_mpeg_sect_crc(tvb, pinfo, dvb_bat_tree, 0, offset);
 171     proto_item_set_len(ti, offset);
 172 }
 173
 174
 175 void
 176 proto_register_dvb_bat(void)
 177 {
 178
 179     static hf_register_info hf[] = {
 180
 181         { &hf_dvb_bat_bouquet_id, {
 182             "Bouquet ID", "dvb_bat.bouquet_id",
 183             FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
 184         } },
 185
 186         { &hf_dvb_bat_reserved1, {
 187             "Reserved", "dvb_bat.reserved1",
 188             FT_UINT8, BASE_HEX, NULL, DVB_BAT_RESERVED1_MASK, NULL, HFILL
 189         } },
 190
 191         { &hf_dvb_bat_version_number, {
 192             "Version Number", "dvb_bat.version",
 193             FT_UINT8, BASE_HEX, NULL, DVB_BAT_VERSION_NUMBER_MASK, NULL, HFILL
 194         } },
 195
 196         { &hf_dvb_bat_current_next_indicator, {
 197             "Current/Next Indicator", "dvb_bat.cur_next_ind",
 198             FT_UINT8, BASE_DEC, VALS(dvb_bat_cur_next_vals), DVB_BAT_CURRENT_NEXT_INDICATOR_MASK, NULL, HFILL
 199         } },
 200
 201         { &hf_dvb_bat_section_number, {
 202             "Section Number", "dvb_bat.sect_num",
 203             FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
 204         } },
 205
 206         { &hf_dvb_bat_last_section_number, {
 207             "Last Section Number", "dvb_bat.last_sect_num",
 208             FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
 209         } },
 210
 211         { &hf_dvb_bat_reserved2, {
 212             "Reserved", "dvb_bat.reserved2",
 213             FT_UINT16, BASE_HEX, NULL, DVB_BAT_RESERVED2_MASK, NULL, HFILL
 214         } },
 215
 216         { &hf_dvb_bat_bouquet_descriptors_length, {
 217             "Bouquet Descriptors Length", "dvb_bat.bouquet_desc_len",
 218             FT_UINT16, BASE_DEC, NULL, DVB_BAT_BOUQUET_DESCRIPTORS_LENGTH_MASK, NULL, HFILL
 219         } },
 220
 221         { &hf_dvb_bat_reserved3, {
 222             "Reserved", "dvb_bat.reserved3",
 223             FT_UINT16, BASE_HEX, NULL, DVB_BAT_RESERVED3_MASK, NULL, HFILL
 224         } },
 225
 226         { &hf_dvb_bat_transport_stream_loop_length, {
 227             "Transport Stream Loop Length", "dvb_bat.ts_loop_len",
 228             FT_UINT16, BASE_DEC, NULL, DVB_BAT_TRANSPORT_STREAM_LOOP_LENGTH_MASK, NULL, HFILL
 229         } },
 230
 231         { &hf_dvb_bat_transport_stream_id, {
 232             "Transport Stream ID", "dvb_bat.ts.id",
 233             FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
 234         } },
 235
 236         { &hf_dvb_bat_original_network_id, {
 237             "Original Network ID", "dvb_bat.ts.original_nid",
 238             FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
 239         } },
 240
 241         { &hf_dvb_bat_reserved4, {
 242             "Reserved", "dvb_bat.ts.reserved",
 243             FT_UINT16, BASE_HEX, NULL, DVB_BAT_RESERVED4_MASK, NULL, HFILL
 244         } },
 245
 246         { &hf_dvb_bat_transport_descriptors_length, {
 247             "Bouquet Descriptors Length", "dvb_bat.ts.desc_len",
 248             FT_UINT16, BASE_DEC, NULL, DVB_BAT_BOUQUET_DESCRIPTORS_LENGTH_MASK, NULL, HFILL
 249         } },
 250
 251     };
 252
 253     static gint *ett[] = {
 254         &ett_dvb_bat,
 255         &ett_dvb_bat_transport_stream
 256     };
 257
 258     proto_dvb_bat = proto_register_protocol("DVB Bouquet Association Table", "DVB BAT", "dvb_bat");
 259
 260     proto_register_field_array(proto_dvb_bat, hf, array_length(hf));
 261     proto_register_subtree_array(ett, array_length(ett));
 262
 263 }
 264
 265
 266 void proto_reg_handoff_dvb_bat(void)
 267 {
 268     dissector_handle_t dvb_bat_handle;
 269
 270     dvb_bat_handle = create_dissector_handle(dissect_dvb_bat, proto_dvb_bat);
 271
 272     dissector_add_uint("mpeg_sect.tid", DVB_BAT_TID, dvb_bat_handle);
 273 }
 274
 275 /*
 276  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 277  *
 278  * Local variables:
 279  * c-basic-offset: 4
 280  * tab-width: 8
 281  * indent-tabs-mode: nil
 282  * End:
 283  *
 284  * vi: set shiftwidth=4 tabstop=8 expandtab:
 285  * :indentSize=4:tabSize=8:noTabs=true:
 286  */