epan/dissectors/packet-mpeg-pmt.c

   1 /* packet-mpeg-pmt.c
   2  * Routines for MPEG2 (ISO/ISO 13818-1) Program Map Table (PMT) 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 static int proto_mpeg_pmt = -1;
  36 static int hf_mpeg_pmt_program_number = -1;
  37 static int hf_mpeg_pmt_reserved1 = -1;
  38 static int hf_mpeg_pmt_version_number = -1;
  39 static int hf_mpeg_pmt_current_next_indicator = -1;
  40 static int hf_mpeg_pmt_section_number = -1;
  41 static int hf_mpeg_pmt_last_section_number = -1;
  42 static int hf_mpeg_pmt_reserved2 = -1;
  43 static int hf_mpeg_pmt_pcr_pid = -1;
  44 static int hf_mpeg_pmt_reserved3 = -1;
  45 static int hf_mpeg_pmt_program_info_length = -1;
  46
  47
  48 static int hf_mpeg_pmt_stream_type = -1;
  49 static int hf_mpeg_pmt_stream_reserved1 = -1;
  50 static int hf_mpeg_pmt_stream_elementary_pid = -1;
  51 static int hf_mpeg_pmt_stream_reserved2 = -1;
  52 static int hf_mpeg_pmt_stream_es_info_length = -1;
  53
  54 static gint ett_mpeg_pmt = -1;
  55 static gint ett_mpeg_pmt_stream = -1;
  56
  57 #define MPEG_PMT_TID                              0x02
  58
  59 #define MPEG_PMT_RESERVED1_MASK                   0xC0
  60 #define MPEG_PMT_VERSION_NUMBER_MASK              0x3E
  61 #define MPEG_PMT_CURRENT_NEXT_INDICATOR_MASK      0x01
  62
  63 #define MPEG_PMT_RESERVED2_MASK                 0xE000
  64 #define MPEG_PMT_PCR_PID_MASK                   0x1FFF
  65 #define MPEG_PMT_RESERVED3_MASK                 0xF000
  66 #define MPEG_PMT_PROGRAM_INFO_LENGTH_MASK       0x0FFF
  67
  68 #define MPEG_PMT_STREAM_RESERVED1_MASK          0xE000
  69 #define MPEG_PMT_STREAM_ELEMENTARY_PID_MASK     0x1FFF
  70
  71 #define MPEG_PMT_STREAM_RESERVED2_MASK          0xF000
  72 #define MPEG_PMT_STREAM_ES_INFO_LENGTH_MASK     0x0FFF
  73
  74
  75 static const value_string mpeg_pmt_cur_next_vals[] = {
  76
  77     { 0x0, "Not yet applicable" },
  78     { 0x1, "Currently applicable" },
  79
  80     { 0x0, NULL }
  81
  82 };
  83
  84 static const value_string mpeg_pmt_stream_type_vals[] = {
  85     { 0x00, "ITU-T | ISO/IEC Reserved" },
  86     { 0x01, "ISO/IEC 11172 Video" },
  87     { 0x02, "ITU-T Rec. H.262 | ISO/IEC 13818-2 Video or ISO/IEC 11172-2 constrained parameter video stream" },
  88     { 0x03, "ISO/IEC 11172 Audio" },
  89     { 0x04, "ISO/IEC 13818-3 Audio" },
  90     { 0x05, "ITU-T Rec. H.222.0 | ISO/IEC 13818-1 private_sections" },
  91     { 0x06, "ITU-T Rec. H.222.0 | ISO/IEC 13818-1 PES packets containing private data" },
  92     { 0x07, "ISO/IEC 13522 MHEG" },
  93     { 0x08, "ITU-T Rec. H.222.0 | ISO/IEC 13818-1 Annex A DSM-CC" },
  94     { 0x09, "ITU-T Rec. H.222.1" },
  95     { 0x0A, "ISO/IEC 13818-6 type A" },
  96     { 0x0B, "ISO/IEC 13818-6 type B" },
  97     { 0x0C, "ISO/IEC 13818-6 type C" },
  98     { 0x0D, "ISO/IEC 13818-6 type D" },
  99     { 0x0E, "ITU-T Rec. H.222.0 | ISO/IEC 13818-1 auxiliary" },
 100     { 0x0F, "ISO/IEC 13818-7 Audio with ADTS transport syntax" },
 101     { 0x10, "ISO/IEC 14496-2 Visual" },
 102     { 0x11, "ISO/IEC 14496-3 Audio with the LATM transport syntax as defined in ISO/IEC 14496-3 / AMD 1" },
 103     { 0x12, "ISO/IEC 14496-1 SL-packetized stream or FlexMux stream carried in PES packets" },
 104     { 0x13, "ISO/IEC 14496-1 SL-packetized stream or FlexMux stream carried in ISO/IEC14496_sections" },
 105     { 0x14, "ISO/IEC 13818-6 Synchronized Download Protocol" },
 106     { 0x15, "Metadata carried in PES packets" },
 107     { 0x16, "Metadata carried in metadata sections" },
 108     { 0x17, "Metadata carried in ISO/IEC 13818-6 Data Carousel" },
 109     { 0x18, "Metadata carried in ISO/IEC 13818-6 Object Carousel" },
 110     { 0x19, "Metadata carried in ISO/IEC 13818-6 Synchronized Download Protocol" },
 111     { 0x1A, "IPMP stream (defined in ISO/IEC 13818-11, MPEG-2 IPMP)" },
 112     { 0x1B, "AVC video stream as defined in ITU-T Rec. H.264 | ISO/IEC 14496-10 Video" },
 113     { 0x7F, "IPMP stream" },
 114     { 0xA1, "ETV-AM BIF Data Stream" },
 115     { 0xC0, "ETV-AM EISS Signaling" },
 116     { 0x00, NULL }
 117 };
 118 value_string_ext mpeg_pmt_stream_type_vals_ext = VALUE_STRING_EXT_INIT(mpeg_pmt_stream_type_vals);
 119
 120 static int
 121 dissect_mpeg_pmt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
 122 {
 123
 124     guint   offset = 0, length = 0;
 125     guint   prog_info_len, es_info_len;
 126     guint16 pid;
 127
 128     proto_item *ti;
 129     proto_tree *mpeg_pmt_tree;
 130     proto_item *si;
 131     proto_tree *mpeg_pmt_stream_tree;
 132
 133     /* The TVB should start right after the section_length in the Section packet */
 134
 135     col_set_str(pinfo->cinfo, COL_INFO, "Program Map Table (PMT)");
 136
 137     ti = proto_tree_add_item(tree, proto_mpeg_pmt, tvb, offset, -1, ENC_NA);
 138     mpeg_pmt_tree = proto_item_add_subtree(ti, ett_mpeg_pmt);
 139
 140     offset += packet_mpeg_sect_header(tvb, offset, mpeg_pmt_tree, &length, NULL);
 141     length -= 4;
 142
 143     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_program_number, tvb, offset, 2, ENC_BIG_ENDIAN);
 144     offset += 2;
 145
 146     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_reserved1, tvb, offset, 1, ENC_BIG_ENDIAN);
 147     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_version_number, tvb, offset, 1, ENC_BIG_ENDIAN);
 148     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_current_next_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
 149     offset += 1;
 150
 151     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
 152     offset += 1;
 153
 154     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
 155     offset += 1;
 156
 157     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_reserved2, tvb, offset, 2, ENC_BIG_ENDIAN);
 158     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_pcr_pid, tvb, offset, 2, ENC_BIG_ENDIAN);
 159     offset += 2;
 160
 161     prog_info_len = tvb_get_ntohs(tvb, offset) & MPEG_PMT_PROGRAM_INFO_LENGTH_MASK;
 162     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_reserved3, tvb, offset, 2, ENC_BIG_ENDIAN);
 163     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_program_info_length, tvb, offset, 2, ENC_BIG_ENDIAN);
 164     offset += 2;
 165
 166     offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, prog_info_len, mpeg_pmt_tree);
 167
 168     while (offset < length) {
 169
 170         pid = tvb_get_ntohs(tvb, offset + 1) & MPEG_PMT_STREAM_ELEMENTARY_PID_MASK;
 171         es_info_len = tvb_get_ntohs(tvb, offset + 3) & MPEG_PMT_STREAM_ES_INFO_LENGTH_MASK;
 172
 173         si = proto_tree_add_text(mpeg_pmt_tree, tvb, offset, 5 + es_info_len, "Stream PID=0x%04hx", pid);
 174         mpeg_pmt_stream_tree = proto_item_add_subtree(si, ett_mpeg_pmt_stream);
 175
 176         proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_type,      tvb, offset, 1, ENC_BIG_ENDIAN);
 177         offset += 1;
 178
 179         proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_reserved1,     tvb, offset, 2, ENC_BIG_ENDIAN);
 180         proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_elementary_pid,    tvb, offset, 2, ENC_BIG_ENDIAN);
 181         offset += 2;
 182
 183         proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_reserved2,     tvb, offset, 2, ENC_BIG_ENDIAN);
 184         proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_es_info_length,    tvb, offset, 2, ENC_BIG_ENDIAN);
 185         offset += 2;
 186
 187         offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, es_info_len, mpeg_pmt_stream_tree);
 188     }
 189
 190     offset += packet_mpeg_sect_crc(tvb, pinfo, mpeg_pmt_tree, 0, offset);
 191
 192     proto_item_set_len(ti, offset);
 193     return offset;
 194 }
 195
 196
 197 void
 198 proto_register_mpeg_pmt(void)
 199 {
 200
 201     static hf_register_info hf[] = {
 202
 203         { &hf_mpeg_pmt_program_number, {
 204             "Program Number", "mpeg_pmt.pg_num",
 205             FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
 206         } },
 207
 208         { &hf_mpeg_pmt_reserved1, {
 209             "Reserved", "mpeg_pmt.reserved1",
 210             FT_UINT8, BASE_HEX, NULL, MPEG_PMT_RESERVED1_MASK, NULL, HFILL
 211         } },
 212
 213         { &hf_mpeg_pmt_version_number, {
 214             "Version Number", "mpeg_pmt.version",
 215             FT_UINT8, BASE_HEX, NULL, MPEG_PMT_VERSION_NUMBER_MASK, NULL, HFILL
 216         } },
 217
 218         { &hf_mpeg_pmt_current_next_indicator, {
 219             "Current/Next Indicator", "mpeg_pmt.cur_next_ind",
 220             FT_UINT8, BASE_HEX, VALS(mpeg_pmt_cur_next_vals), MPEG_PMT_CURRENT_NEXT_INDICATOR_MASK, NULL, HFILL
 221         } },
 222
 223         { &hf_mpeg_pmt_section_number, {
 224             "Section Number", "mpeg_pmt.sect_num",
 225             FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
 226         } },
 227
 228         { &hf_mpeg_pmt_last_section_number, {
 229             "Last Section Number", "mpeg_pmt.last_sect_num",
 230             FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
 231         } },
 232
 233         { &hf_mpeg_pmt_reserved2, {
 234             "Reserved", "mpeg_pmt.reserved2",
 235             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_RESERVED2_MASK, NULL, HFILL
 236         } },
 237
 238         { &hf_mpeg_pmt_pcr_pid, {
 239             "PCR PID", "mpeg_pmt.pcr_pid",
 240             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_PCR_PID_MASK, NULL, HFILL
 241         } },
 242
 243         { &hf_mpeg_pmt_reserved3, {
 244             "Reserved", "mpeg_pmt.reserved3",
 245             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_RESERVED3_MASK, NULL, HFILL
 246         } },
 247
 248         { &hf_mpeg_pmt_program_info_length, {
 249             "Program Info Length", "mpeg_pmt.prog_info_len",
 250             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_PROGRAM_INFO_LENGTH_MASK, NULL, HFILL
 251         } },
 252
 253
 254         { &hf_mpeg_pmt_stream_type, {
 255             "Stream type", "mpeg_pmt.stream.type",
 256             FT_UINT8, BASE_HEX | BASE_EXT_STRING, &mpeg_pmt_stream_type_vals_ext, 0, NULL, HFILL
 257         } },
 258
 259         { &hf_mpeg_pmt_stream_reserved1, {
 260             "Reserved", "mpeg_pmt.stream.reserved1",
 261             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_STREAM_RESERVED1_MASK, NULL, HFILL
 262         } },
 263
 264         { &hf_mpeg_pmt_stream_elementary_pid, {
 265             "Elementary PID", "mpeg_pmt.stream.elementary_pid",
 266             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_STREAM_ELEMENTARY_PID_MASK, NULL, HFILL
 267         } },
 268
 269         { &hf_mpeg_pmt_stream_reserved2, {
 270             "Reserved", "mpeg_pmt.stream.reserved2",
 271             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_STREAM_RESERVED2_MASK, NULL, HFILL
 272         } },
 273
 274         { &hf_mpeg_pmt_stream_es_info_length, {
 275             "ES Info Length", "mpeg_pmt.stream.es_info_len",
 276             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_STREAM_ES_INFO_LENGTH_MASK, NULL, HFILL
 277         } },
 278
 279     };
 280
 281     static gint *ett[] = {
 282         &ett_mpeg_pmt,
 283         &ett_mpeg_pmt_stream,
 284     };
 285
 286     proto_mpeg_pmt = proto_register_protocol("MPEG2 Program Map Table", "MPEG PMT", "mpeg_pmt");
 287
 288     proto_register_field_array(proto_mpeg_pmt, hf, array_length(hf));
 289     proto_register_subtree_array(ett, array_length(ett));
 290
 291     new_register_dissector("mpeg_pmt", dissect_mpeg_pmt, proto_mpeg_pmt);
 292 }
 293
 294
 295 void
 296 proto_reg_handoff_mpeg_pmt(void)
 297 {
 298     dissector_handle_t mpeg_pmt_handle;
 299
 300     mpeg_pmt_handle = find_dissector("mpeg_pmt");
 301
 302     dissector_add_uint("mpeg_sect.tid", MPEG_PMT_TID, mpeg_pmt_handle);
 303 }
 304
 305 /*
 306  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 307  *
 308  * Local variables:
 309  * c-basic-offset: 4
 310  * tab-width: 8
 311  * indent-tabs-mode: nil
 312  * End:
 313  *
 314  * vi: set shiftwidth=4 tabstop=8 expandtab:
 315  * :indentSize=4:tabSize=8:noTabs=true:
 316  */