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  * 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 #include "packet-mpeg-descriptor.h"
  17
  18 void proto_register_mpeg_pmt(void);
  19 void proto_reg_handoff_mpeg_pmt(void);
  20
  21 static int proto_mpeg_pmt = -1;
  22 static int hf_mpeg_pmt_program_number = -1;
  23 static int hf_mpeg_pmt_reserved1 = -1;
  24 static int hf_mpeg_pmt_version_number = -1;
  25 static int hf_mpeg_pmt_current_next_indicator = -1;
  26 static int hf_mpeg_pmt_section_number = -1;
  27 static int hf_mpeg_pmt_last_section_number = -1;
  28 static int hf_mpeg_pmt_reserved2 = -1;
  29 static int hf_mpeg_pmt_pcr_pid = -1;
  30 static int hf_mpeg_pmt_reserved3 = -1;
  31 static int hf_mpeg_pmt_program_info_length = -1;
  32
  33
  34 static int hf_mpeg_pmt_stream_type = -1;
  35 static int hf_mpeg_pmt_stream_reserved1 = -1;
  36 static int hf_mpeg_pmt_stream_elementary_pid = -1;
  37 static int hf_mpeg_pmt_stream_reserved2 = -1;
  38 static int hf_mpeg_pmt_stream_es_info_length = -1;
  39
  40 static gint ett_mpeg_pmt = -1;
  41 static gint ett_mpeg_pmt_stream = -1;
  42
  43 static dissector_handle_t mpeg_pmt_handle;
  44
  45 #define MPEG_PMT_RESERVED1_MASK                   0xC0
  46 #define MPEG_PMT_VERSION_NUMBER_MASK              0x3E
  47 #define MPEG_PMT_CURRENT_NEXT_INDICATOR_MASK      0x01
  48
  49 #define MPEG_PMT_RESERVED2_MASK                 0xE000
  50 #define MPEG_PMT_PCR_PID_MASK                   0x1FFF
  51 #define MPEG_PMT_RESERVED3_MASK                 0xF000
  52 #define MPEG_PMT_PROGRAM_INFO_LENGTH_MASK       0x0FFF
  53
  54 #define MPEG_PMT_STREAM_RESERVED1_MASK          0xE000
  55 #define MPEG_PMT_STREAM_ELEMENTARY_PID_MASK     0x1FFF
  56
  57 #define MPEG_PMT_STREAM_RESERVED2_MASK          0xF000
  58 #define MPEG_PMT_STREAM_ES_INFO_LENGTH_MASK     0x0FFF
  59
  60
  61 static const value_string mpeg_pmt_cur_next_vals[] = {
  62
  63     { 0x0, "Not yet applicable" },
  64     { 0x1, "Currently applicable" },
  65
  66     { 0x0, NULL }
  67
  68 };
  69
  70 static const value_string mpeg_pmt_stream_type_vals[] = {
  71     { 0x00, "ITU-T | ISO/IEC Reserved" },
  72     { 0x01, "ISO/IEC 11172 Video" },
  73     { 0x02, "ITU-T Rec. H.262 | ISO/IEC 13818-2 Video or ISO/IEC 11172-2 constrained parameter video stream" },
  74     { 0x03, "ISO/IEC 11172 Audio" },
  75     { 0x04, "ISO/IEC 13818-3 Audio" },
  76     { 0x05, "ITU-T Rec. H.222.0 | ISO/IEC 13818-1 private_sections" },
  77     { 0x06, "ITU-T Rec. H.222.0 | ISO/IEC 13818-1 PES packets containing private data" },
  78     { 0x07, "ISO/IEC 13522 MHEG" },
  79     { 0x08, "ITU-T Rec. H.222.0 | ISO/IEC 13818-1 Annex A DSM-CC" },
  80     { 0x09, "ITU-T Rec. H.222.1" },
  81     { 0x0A, "ISO/IEC 13818-6 type A" },
  82     { 0x0B, "ISO/IEC 13818-6 type B" },
  83     { 0x0C, "ISO/IEC 13818-6 type C" },
  84     { 0x0D, "ISO/IEC 13818-6 type D" },
  85     { 0x0E, "ITU-T Rec. H.222.0 | ISO/IEC 13818-1 auxiliary" },
  86     { 0x0F, "ISO/IEC 13818-7 Audio with ADTS transport syntax" },
  87     { 0x10, "ISO/IEC 14496-2 Visual" },
  88     { 0x11, "ISO/IEC 14496-3 Audio with the LATM transport syntax as defined in ISO/IEC 14496-3 / AMD 1" },
  89     { 0x12, "ISO/IEC 14496-1 SL-packetized stream or FlexMux stream carried in PES packets" },
  90     { 0x13, "ISO/IEC 14496-1 SL-packetized stream or FlexMux stream carried in ISO/IEC14496_sections" },
  91     { 0x14, "ISO/IEC 13818-6 Synchronized Download Protocol" },
  92     { 0x15, "Metadata carried in PES packets" },
  93     { 0x16, "Metadata carried in metadata sections" },
  94     { 0x17, "Metadata carried in ISO/IEC 13818-6 Data Carousel" },
  95     { 0x18, "Metadata carried in ISO/IEC 13818-6 Object Carousel" },
  96     { 0x19, "Metadata carried in ISO/IEC 13818-6 Synchronized Download Protocol" },
  97     { 0x1A, "IPMP stream (defined in ISO/IEC 13818-11, MPEG-2 IPMP)" },
  98     { 0x1B, "AVC video stream as defined in ITU-T Rec. H.264 | ISO/IEC 14496-10 Video" },
  99     { 0x24, "ITU-T Rec. H.265 and ISO/IEC 23008-2 (Ultra HD video) in a packetized stream" },
 100     { 0x7F, "IPMP stream" },
 101     { 0x81, "ATSC A/52 Audio" },
 102     { 0x86, "SCTE-35 Splice Information" },
 103     { 0xA1, "ETV-AM BIF Data Stream" },
 104     { 0xC0, "ETV-AM EISS Signaling" },
 105     { 0x00, NULL }
 106 };
 107 value_string_ext mpeg_pmt_stream_type_vals_ext = VALUE_STRING_EXT_INIT(mpeg_pmt_stream_type_vals);
 108
 109 static int
 110 dissect_mpeg_pmt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
 111 {
 112
 113     guint   offset = 0, length = 0;
 114     guint   prog_info_len, es_info_len;
 115     guint16 pid;
 116
 117     proto_item *ti;
 118     proto_tree *mpeg_pmt_tree;
 119     proto_tree *mpeg_pmt_stream_tree;
 120
 121     /* The TVB should start right after the section_length in the Section packet */
 122
 123     col_set_str(pinfo->cinfo, COL_INFO, "Program Map Table (PMT)");
 124
 125     ti = proto_tree_add_item(tree, proto_mpeg_pmt, tvb, offset, -1, ENC_NA);
 126     mpeg_pmt_tree = proto_item_add_subtree(ti, ett_mpeg_pmt);
 127
 128     offset += packet_mpeg_sect_header(tvb, offset, mpeg_pmt_tree, &length, NULL);
 129     length -= 4;
 130
 131     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_program_number, tvb, offset, 2, ENC_BIG_ENDIAN);
 132     offset += 2;
 133
 134     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_reserved1, tvb, offset, 1, ENC_BIG_ENDIAN);
 135     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_version_number, tvb, offset, 1, ENC_BIG_ENDIAN);
 136     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_current_next_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
 137     offset += 1;
 138
 139     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
 140     offset += 1;
 141
 142     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
 143     offset += 1;
 144
 145     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_reserved2, tvb, offset, 2, ENC_BIG_ENDIAN);
 146     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_pcr_pid, tvb, offset, 2, ENC_BIG_ENDIAN);
 147     offset += 2;
 148
 149     prog_info_len = tvb_get_ntohs(tvb, offset) & MPEG_PMT_PROGRAM_INFO_LENGTH_MASK;
 150     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_reserved3, tvb, offset, 2, ENC_BIG_ENDIAN);
 151     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_program_info_length, tvb, offset, 2, ENC_BIG_ENDIAN);
 152     offset += 2;
 153
 154     offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, prog_info_len, mpeg_pmt_tree);
 155
 156     while (offset < length) {
 157
 158         pid = tvb_get_ntohs(tvb, offset + 1) & MPEG_PMT_STREAM_ELEMENTARY_PID_MASK;
 159         es_info_len = tvb_get_ntohs(tvb, offset + 3) & MPEG_PMT_STREAM_ES_INFO_LENGTH_MASK;
 160
 161         mpeg_pmt_stream_tree = proto_tree_add_subtree_format(mpeg_pmt_tree, tvb, offset, 5 + es_info_len,
 162                             ett_mpeg_pmt_stream, NULL, "Stream PID=0x%04hx", pid);
 163
 164         proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_type,      tvb, offset, 1, ENC_BIG_ENDIAN);
 165         offset += 1;
 166
 167         proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_reserved1,     tvb, offset, 2, ENC_BIG_ENDIAN);
 168         proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_elementary_pid,    tvb, offset, 2, ENC_BIG_ENDIAN);
 169         offset += 2;
 170
 171         proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_reserved2,     tvb, offset, 2, ENC_BIG_ENDIAN);
 172         proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_es_info_length,    tvb, offset, 2, ENC_BIG_ENDIAN);
 173         offset += 2;
 174
 175         offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, es_info_len, mpeg_pmt_stream_tree);
 176     }
 177
 178     offset += packet_mpeg_sect_crc(tvb, pinfo, mpeg_pmt_tree, 0, offset);
 179
 180     proto_item_set_len(ti, offset);
 181     return offset;
 182 }
 183
 184
 185 void
 186 proto_register_mpeg_pmt(void)
 187 {
 188
 189     static hf_register_info hf[] = {
 190
 191         { &hf_mpeg_pmt_program_number, {
 192             "Program Number", "mpeg_pmt.pg_num",
 193             FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
 194         } },
 195
 196         { &hf_mpeg_pmt_reserved1, {
 197             "Reserved", "mpeg_pmt.reserved1",
 198             FT_UINT8, BASE_HEX, NULL, MPEG_PMT_RESERVED1_MASK, NULL, HFILL
 199         } },
 200
 201         { &hf_mpeg_pmt_version_number, {
 202             "Version Number", "mpeg_pmt.version",
 203             FT_UINT8, BASE_HEX, NULL, MPEG_PMT_VERSION_NUMBER_MASK, NULL, HFILL
 204         } },
 205
 206         { &hf_mpeg_pmt_current_next_indicator, {
 207             "Current/Next Indicator", "mpeg_pmt.cur_next_ind",
 208             FT_UINT8, BASE_HEX, VALS(mpeg_pmt_cur_next_vals), MPEG_PMT_CURRENT_NEXT_INDICATOR_MASK, NULL, HFILL
 209         } },
 210
 211         { &hf_mpeg_pmt_section_number, {
 212             "Section Number", "mpeg_pmt.sect_num",
 213             FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
 214         } },
 215
 216         { &hf_mpeg_pmt_last_section_number, {
 217             "Last Section Number", "mpeg_pmt.last_sect_num",
 218             FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
 219         } },
 220
 221         { &hf_mpeg_pmt_reserved2, {
 222             "Reserved", "mpeg_pmt.reserved2",
 223             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_RESERVED2_MASK, NULL, HFILL
 224         } },
 225
 226         { &hf_mpeg_pmt_pcr_pid, {
 227             "PCR PID", "mpeg_pmt.pcr_pid",
 228             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_PCR_PID_MASK, NULL, HFILL
 229         } },
 230
 231         { &hf_mpeg_pmt_reserved3, {
 232             "Reserved", "mpeg_pmt.reserved3",
 233             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_RESERVED3_MASK, NULL, HFILL
 234         } },
 235
 236         { &hf_mpeg_pmt_program_info_length, {
 237             "Program Info Length", "mpeg_pmt.prog_info_len",
 238             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_PROGRAM_INFO_LENGTH_MASK, NULL, HFILL
 239         } },
 240
 241
 242         { &hf_mpeg_pmt_stream_type, {
 243             "Stream type", "mpeg_pmt.stream.type",
 244             FT_UINT8, BASE_HEX | BASE_EXT_STRING, &mpeg_pmt_stream_type_vals_ext, 0, NULL, HFILL
 245         } },
 246
 247         { &hf_mpeg_pmt_stream_reserved1, {
 248             "Reserved", "mpeg_pmt.stream.reserved1",
 249             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_STREAM_RESERVED1_MASK, NULL, HFILL
 250         } },
 251
 252         { &hf_mpeg_pmt_stream_elementary_pid, {
 253             "Elementary PID", "mpeg_pmt.stream.elementary_pid",
 254             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_STREAM_ELEMENTARY_PID_MASK, NULL, HFILL
 255         } },
 256
 257         { &hf_mpeg_pmt_stream_reserved2, {
 258             "Reserved", "mpeg_pmt.stream.reserved2",
 259             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_STREAM_RESERVED2_MASK, NULL, HFILL
 260         } },
 261
 262         { &hf_mpeg_pmt_stream_es_info_length, {
 263             "ES Info Length", "mpeg_pmt.stream.es_info_len",
 264             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_STREAM_ES_INFO_LENGTH_MASK, NULL, HFILL
 265         } },
 266
 267     };
 268
 269     static gint *ett[] = {
 270         &ett_mpeg_pmt,
 271         &ett_mpeg_pmt_stream,
 272     };
 273
 274     proto_mpeg_pmt = proto_register_protocol("MPEG2 Program Map Table", "MPEG PMT", "mpeg_pmt");
 275
 276     proto_register_field_array(proto_mpeg_pmt, hf, array_length(hf));
 277     proto_register_subtree_array(ett, array_length(ett));
 278
 279     mpeg_pmt_handle = register_dissector("mpeg_pmt", dissect_mpeg_pmt, proto_mpeg_pmt);
 280 }
 281
 282
 283 void
 284 proto_reg_handoff_mpeg_pmt(void)
 285 {
 286     dissector_add_uint("mpeg_sect.tid", MPEG_PMT_TID, mpeg_pmt_handle);
 287 }
 288
 289 /*
 290  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 291  *
 292  * Local variables:
 293  * c-basic-offset: 4
 294  * tab-width: 8
 295  * indent-tabs-mode: nil
 296  * End:
 297  *
 298  * vi: set shiftwidth=4 tabstop=8 expandtab:
 299  * :indentSize=4:tabSize=8:noTabs=true:
 300  */