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 <epan/tfs.h>
  16 #include <wsutil/array.h>
  17 #include "packet-mp2t.h"
  18 #include "packet-mpeg-sect.h"
  19 #include "packet-mpeg-descriptor.h"
  20
  21 void proto_register_mpeg_pmt(void);
  22 void proto_reg_handoff_mpeg_pmt(void);
  23
  24 static int proto_mpeg_pmt;
  25 static int hf_mpeg_pmt_program_number;
  26 static int hf_mpeg_pmt_reserved1;
  27 static int hf_mpeg_pmt_version_number;
  28 static int hf_mpeg_pmt_current_next_indicator;
  29 static int hf_mpeg_pmt_section_number;
  30 static int hf_mpeg_pmt_last_section_number;
  31 static int hf_mpeg_pmt_reserved2;
  32 static int hf_mpeg_pmt_pcr_pid;
  33 static int hf_mpeg_pmt_reserved3;
  34 static int hf_mpeg_pmt_program_info_length;
  35
  36
  37 static int hf_mpeg_pmt_stream_type;
  38 static int hf_mpeg_pmt_stream_reserved1;
  39 static int hf_mpeg_pmt_stream_elementary_pid;
  40 static int hf_mpeg_pmt_stream_reserved2;
  41 static int hf_mpeg_pmt_stream_es_info_length;
  42
  43 static int ett_mpeg_pmt;
  44 static int ett_mpeg_pmt_stream;
  45
  46 static dissector_handle_t mpeg_pmt_handle;
  47
  48 #define MPEG_PMT_RESERVED1_MASK                   0xC0
  49 #define MPEG_PMT_VERSION_NUMBER_MASK              0x3E
  50 #define MPEG_PMT_CURRENT_NEXT_INDICATOR_MASK      0x01
  51
  52 #define MPEG_PMT_RESERVED2_MASK                 0xE000
  53 #define MPEG_PMT_PCR_PID_MASK                   0x1FFF
  54 #define MPEG_PMT_RESERVED3_MASK                 0xF000
  55 #define MPEG_PMT_PROGRAM_INFO_LENGTH_MASK       0x0FFF
  56
  57 #define MPEG_PMT_STREAM_RESERVED1_MASK          0xE000
  58 #define MPEG_PMT_STREAM_ELEMENTARY_PID_MASK     0x1FFF
  59
  60 #define MPEG_PMT_STREAM_RESERVED2_MASK          0xF000
  61 #define MPEG_PMT_STREAM_ES_INFO_LENGTH_MASK     0x0FFF
  62
  63
  64 static const value_string mpeg_pmt_stream_type_vals[] = {
  65     { 0x00, "ITU-T | ISO/IEC Reserved" },
  66     { 0x01, "ISO/IEC 11172 Video" },
  67     { 0x02, "ITU-T Rec. H.262 | ISO/IEC 13818-2 Video or ISO/IEC 11172-2 constrained parameter video stream" },
  68     { 0x03, "ISO/IEC 11172 Audio" },
  69     { 0x04, "ISO/IEC 13818-3 Audio" },
  70     { 0x05, "ITU-T Rec. H.222.0 | ISO/IEC 13818-1 private_sections" },
  71     { 0x06, "ITU-T Rec. H.222.0 | ISO/IEC 13818-1 PES packets containing private data" },
  72     { 0x07, "ISO/IEC 13522 MHEG" },
  73     { 0x08, "ITU-T Rec. H.222.0 | ISO/IEC 13818-1 Annex A DSM-CC" },
  74     { 0x09, "ITU-T Rec. H.222.1" },
  75     { 0x0A, "ISO/IEC 13818-6 type A" },
  76     { 0x0B, "ISO/IEC 13818-6 type B" },
  77     { 0x0C, "ISO/IEC 13818-6 type C" },
  78     { 0x0D, "ISO/IEC 13818-6 type D" },
  79     { 0x0E, "ITU-T Rec. H.222.0 | ISO/IEC 13818-1 auxiliary" },
  80     { 0x0F, "ISO/IEC 13818-7 Audio with ADTS transport syntax" },
  81     { 0x10, "ISO/IEC 14496-2 Visual" },
  82     { 0x11, "ISO/IEC 14496-3 Audio with the LATM transport syntax as defined in ISO/IEC 14496-3 / AMD 1" },
  83     { 0x12, "ISO/IEC 14496-1 SL-packetized stream or FlexMux stream carried in PES packets" },
  84     { 0x13, "ISO/IEC 14496-1 SL-packetized stream or FlexMux stream carried in ISO/IEC14496_sections" },
  85     { 0x14, "ISO/IEC 13818-6 Synchronized Download Protocol" },
  86     { 0x15, "Metadata carried in PES packets" },
  87     { 0x16, "Metadata carried in metadata sections" },
  88     { 0x17, "Metadata carried in ISO/IEC 13818-6 Data Carousel" },
  89     { 0x18, "Metadata carried in ISO/IEC 13818-6 Object Carousel" },
  90     { 0x19, "Metadata carried in ISO/IEC 13818-6 Synchronized Download Protocol" },
  91     { 0x1A, "IPMP stream (defined in ISO/IEC 13818-11, MPEG-2 IPMP)" },
  92     { 0x1B, "AVC video stream as defined in ITU-T Rec. H.264 | ISO/IEC 14496-10 Video" },
  93     { 0x24, "ITU-T Rec. H.265 and ISO/IEC 23008-2 (Ultra HD video) in a packetized stream" },
  94     { 0x7F, "IPMP stream" },
  95     { 0x81, "ATSC A/52 Audio" },
  96     { 0x86, "SCTE-35 Splice Information" },
  97     { 0xA1, "ETV-AM BIF Data Stream" },
  98     { 0xC0, "ETV-AM EISS Signaling" },
  99     { 0x00, NULL }
 100 };
 101 value_string_ext mpeg_pmt_stream_type_vals_ext = VALUE_STRING_EXT_INIT(mpeg_pmt_stream_type_vals);
 102
 103 static int
 104 dissect_mpeg_pmt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
 105 {
 106
 107     unsigned   offset = 0, length = 0;
 108     unsigned   prog_info_len, es_info_len;
 109     uint32_t stream_type;
 110     uint16_t pid;
 111     bool current;
 112
 113     proto_item *ti;
 114     proto_tree *mpeg_pmt_tree;
 115     proto_tree *mpeg_pmt_stream_tree;
 116
 117     /* The TVB should start right after the section_length in the Section packet */
 118
 119     col_set_str(pinfo->cinfo, COL_INFO, "Program Map Table (PMT)");
 120
 121     ti = proto_tree_add_item(tree, proto_mpeg_pmt, tvb, offset, -1, ENC_NA);
 122     mpeg_pmt_tree = proto_item_add_subtree(ti, ett_mpeg_pmt);
 123
 124     offset += packet_mpeg_sect_header(tvb, offset, mpeg_pmt_tree, &length, NULL);
 125     length -= 4;
 126
 127     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_program_number, tvb, offset, 2, ENC_BIG_ENDIAN);
 128     offset += 2;
 129
 130     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_reserved1, tvb, offset, 1, ENC_BIG_ENDIAN);
 131     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_version_number, tvb, offset, 1, ENC_BIG_ENDIAN);
 132     proto_tree_add_item_ret_boolean(mpeg_pmt_tree, hf_mpeg_pmt_current_next_indicator, tvb, offset, 1, ENC_BIG_ENDIAN, &current);
 133     offset += 1;
 134
 135     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
 136     offset += 1;
 137
 138     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
 139     offset += 1;
 140
 141     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_reserved2, tvb, offset, 2, ENC_BIG_ENDIAN);
 142     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_pcr_pid, tvb, offset, 2, ENC_BIG_ENDIAN);
 143     offset += 2;
 144
 145     prog_info_len = tvb_get_ntohs(tvb, offset) & MPEG_PMT_PROGRAM_INFO_LENGTH_MASK;
 146     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_reserved3, tvb, offset, 2, ENC_BIG_ENDIAN);
 147     proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_program_info_length, tvb, offset, 2, ENC_BIG_ENDIAN);
 148     offset += 2;
 149
 150     offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, prog_info_len, mpeg_pmt_tree);
 151
 152     while (offset < length) {
 153
 154         pid = tvb_get_ntohs(tvb, offset + 1) & MPEG_PMT_STREAM_ELEMENTARY_PID_MASK;
 155         es_info_len = tvb_get_ntohs(tvb, offset + 3) & MPEG_PMT_STREAM_ES_INFO_LENGTH_MASK;
 156
 157         mpeg_pmt_stream_tree = proto_tree_add_subtree_format(mpeg_pmt_tree, tvb, offset, 5 + es_info_len,
 158                             ett_mpeg_pmt_stream, NULL, "Stream PID=0x%04hx", pid);
 159
 160         proto_tree_add_item_ret_uint(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_type,      tvb, offset, 1, ENC_BIG_ENDIAN, &stream_type);
 161         if (current) {
 162             mp2t_add_stream_type(pinfo, pid, stream_type);
 163         }
 164         offset += 1;
 165
 166         proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_reserved1,     tvb, offset, 2, ENC_BIG_ENDIAN);
 167         proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_elementary_pid,    tvb, offset, 2, ENC_BIG_ENDIAN);
 168         offset += 2;
 169
 170         proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_reserved2,     tvb, offset, 2, ENC_BIG_ENDIAN);
 171         proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_es_info_length,    tvb, offset, 2, ENC_BIG_ENDIAN);
 172         offset += 2;
 173
 174         offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, es_info_len, mpeg_pmt_stream_tree);
 175     }
 176
 177     offset += packet_mpeg_sect_crc(tvb, pinfo, mpeg_pmt_tree, 0, offset);
 178
 179     proto_item_set_len(ti, offset);
 180     return offset;
 181 }
 182
 183
 184 void
 185 proto_register_mpeg_pmt(void)
 186 {
 187
 188     static hf_register_info hf[] = {
 189
 190         { &hf_mpeg_pmt_program_number, {
 191             "Program Number", "mpeg_pmt.pg_num",
 192             FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
 193         } },
 194
 195         { &hf_mpeg_pmt_reserved1, {
 196             "Reserved", "mpeg_pmt.reserved1",
 197             FT_UINT8, BASE_HEX, NULL, MPEG_PMT_RESERVED1_MASK, NULL, HFILL
 198         } },
 199
 200         { &hf_mpeg_pmt_version_number, {
 201             "Version Number", "mpeg_pmt.version",
 202             FT_UINT8, BASE_HEX, NULL, MPEG_PMT_VERSION_NUMBER_MASK, NULL, HFILL
 203         } },
 204
 205         { &hf_mpeg_pmt_current_next_indicator, {
 206             "Current/Next Indicator", "mpeg_pmt.cur_next_ind",
 207             FT_BOOLEAN, 8, TFS(&tfs_current_not_yet), MPEG_PMT_CURRENT_NEXT_INDICATOR_MASK, NULL, HFILL
 208         } },
 209
 210         { &hf_mpeg_pmt_section_number, {
 211             "Section Number", "mpeg_pmt.sect_num",
 212             FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
 213         } },
 214
 215         { &hf_mpeg_pmt_last_section_number, {
 216             "Last Section Number", "mpeg_pmt.last_sect_num",
 217             FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
 218         } },
 219
 220         { &hf_mpeg_pmt_reserved2, {
 221             "Reserved", "mpeg_pmt.reserved2",
 222             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_RESERVED2_MASK, NULL, HFILL
 223         } },
 224
 225         { &hf_mpeg_pmt_pcr_pid, {
 226             "PCR PID", "mpeg_pmt.pcr_pid",
 227             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_PCR_PID_MASK, NULL, HFILL
 228         } },
 229
 230         { &hf_mpeg_pmt_reserved3, {
 231             "Reserved", "mpeg_pmt.reserved3",
 232             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_RESERVED3_MASK, NULL, HFILL
 233         } },
 234
 235         { &hf_mpeg_pmt_program_info_length, {
 236             "Program Info Length", "mpeg_pmt.prog_info_len",
 237             FT_UINT16, BASE_DEC, NULL, MPEG_PMT_PROGRAM_INFO_LENGTH_MASK, NULL, HFILL
 238         } },
 239
 240
 241         { &hf_mpeg_pmt_stream_type, {
 242             "Stream type", "mpeg_pmt.stream.type",
 243             FT_UINT8, BASE_HEX | BASE_EXT_STRING, &mpeg_pmt_stream_type_vals_ext, 0, NULL, HFILL
 244         } },
 245
 246         { &hf_mpeg_pmt_stream_reserved1, {
 247             "Reserved", "mpeg_pmt.stream.reserved1",
 248             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_STREAM_RESERVED1_MASK, NULL, HFILL
 249         } },
 250
 251         { &hf_mpeg_pmt_stream_elementary_pid, {
 252             "Elementary PID", "mpeg_pmt.stream.elementary_pid",
 253             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_STREAM_ELEMENTARY_PID_MASK, NULL, HFILL
 254         } },
 255
 256         { &hf_mpeg_pmt_stream_reserved2, {
 257             "Reserved", "mpeg_pmt.stream.reserved2",
 258             FT_UINT16, BASE_HEX, NULL, MPEG_PMT_STREAM_RESERVED2_MASK, NULL, HFILL
 259         } },
 260
 261         { &hf_mpeg_pmt_stream_es_info_length, {
 262             "ES Info Length", "mpeg_pmt.stream.es_info_len",
 263             FT_UINT16, BASE_DEC, NULL, MPEG_PMT_STREAM_ES_INFO_LENGTH_MASK, NULL, HFILL
 264         } },
 265
 266     };
 267
 268     static int *ett[] = {
 269         &ett_mpeg_pmt,
 270         &ett_mpeg_pmt_stream,
 271     };
 272
 273     proto_mpeg_pmt = proto_register_protocol("MPEG2 Program Map Table", "MPEG PMT", "mpeg_pmt");
 274
 275     proto_register_field_array(proto_mpeg_pmt, hf, array_length(hf));
 276     proto_register_subtree_array(ett, array_length(ett));
 277
 278     mpeg_pmt_handle = register_dissector("mpeg_pmt", dissect_mpeg_pmt, proto_mpeg_pmt);
 279 }
 280
 281
 282 void
 283 proto_reg_handoff_mpeg_pmt(void)
 284 {
 285     dissector_add_uint("mpeg_sect.tid", MPEG_PMT_TID, mpeg_pmt_handle);
 286 }
 287
 288 /*
 289  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 290  *
 291  * Local variables:
 292  * c-basic-offset: 4
 293  * tab-width: 8
 294  * indent-tabs-mode: nil
 295  * End:
 296  *
 297  * vi: set shiftwidth=4 tabstop=8 expandtab:
 298  * :indentSize=4:tabSize=8:noTabs=true:
 299  */