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/* packet-mpeg-pmt.c
* Routines for MPEG2 (ISO/ISO 13818-1) Program Map Table (PMT) dissection
* Copyright 2012, Guy Martin <gmsoft@tuxicoman.be>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include "packet-mpeg-sect.h"
#include "packet-mpeg-descriptor.h"
void proto_register_mpeg_pmt(void);
void proto_reg_handoff_mpeg_pmt(void);
static int proto_mpeg_pmt = -1;
static int hf_mpeg_pmt_program_number = -1;
static int hf_mpeg_pmt_reserved1 = -1;
static int hf_mpeg_pmt_version_number = -1;
static int hf_mpeg_pmt_current_next_indicator = -1;
static int hf_mpeg_pmt_section_number = -1;
static int hf_mpeg_pmt_last_section_number = -1;
static int hf_mpeg_pmt_reserved2 = -1;
static int hf_mpeg_pmt_pcr_pid = -1;
static int hf_mpeg_pmt_reserved3 = -1;
static int hf_mpeg_pmt_program_info_length = -1;
static int hf_mpeg_pmt_stream_type = -1;
static int hf_mpeg_pmt_stream_reserved1 = -1;
static int hf_mpeg_pmt_stream_elementary_pid = -1;
static int hf_mpeg_pmt_stream_reserved2 = -1;
static int hf_mpeg_pmt_stream_es_info_length = -1;
static gint ett_mpeg_pmt = -1;
static gint ett_mpeg_pmt_stream = -1;
static dissector_handle_t mpeg_pmt_handle;
#define MPEG_PMT_RESERVED1_MASK 0xC0
#define MPEG_PMT_VERSION_NUMBER_MASK 0x3E
#define MPEG_PMT_CURRENT_NEXT_INDICATOR_MASK 0x01
#define MPEG_PMT_RESERVED2_MASK 0xE000
#define MPEG_PMT_PCR_PID_MASK 0x1FFF
#define MPEG_PMT_RESERVED3_MASK 0xF000
#define MPEG_PMT_PROGRAM_INFO_LENGTH_MASK 0x0FFF
#define MPEG_PMT_STREAM_RESERVED1_MASK 0xE000
#define MPEG_PMT_STREAM_ELEMENTARY_PID_MASK 0x1FFF
#define MPEG_PMT_STREAM_RESERVED2_MASK 0xF000
#define MPEG_PMT_STREAM_ES_INFO_LENGTH_MASK 0x0FFF
static const value_string mpeg_pmt_cur_next_vals[] = {
{ 0x0, "Not yet applicable" },
{ 0x1, "Currently applicable" },
{ 0x0, NULL }
};
static const value_string mpeg_pmt_stream_type_vals[] = {
{ 0x00, "ITU-T | ISO/IEC Reserved" },
{ 0x01, "ISO/IEC 11172 Video" },
{ 0x02, "ITU-T Rec. H.262 | ISO/IEC 13818-2 Video or ISO/IEC 11172-2 constrained parameter video stream" },
{ 0x03, "ISO/IEC 11172 Audio" },
{ 0x04, "ISO/IEC 13818-3 Audio" },
{ 0x05, "ITU-T Rec. H.222.0 | ISO/IEC 13818-1 private_sections" },
{ 0x06, "ITU-T Rec. H.222.0 | ISO/IEC 13818-1 PES packets containing private data" },
{ 0x07, "ISO/IEC 13522 MHEG" },
{ 0x08, "ITU-T Rec. H.222.0 | ISO/IEC 13818-1 Annex A DSM-CC" },
{ 0x09, "ITU-T Rec. H.222.1" },
{ 0x0A, "ISO/IEC 13818-6 type A" },
{ 0x0B, "ISO/IEC 13818-6 type B" },
{ 0x0C, "ISO/IEC 13818-6 type C" },
{ 0x0D, "ISO/IEC 13818-6 type D" },
{ 0x0E, "ITU-T Rec. H.222.0 | ISO/IEC 13818-1 auxiliary" },
{ 0x0F, "ISO/IEC 13818-7 Audio with ADTS transport syntax" },
{ 0x10, "ISO/IEC 14496-2 Visual" },
{ 0x11, "ISO/IEC 14496-3 Audio with the LATM transport syntax as defined in ISO/IEC 14496-3 / AMD 1" },
{ 0x12, "ISO/IEC 14496-1 SL-packetized stream or FlexMux stream carried in PES packets" },
{ 0x13, "ISO/IEC 14496-1 SL-packetized stream or FlexMux stream carried in ISO/IEC14496_sections" },
{ 0x14, "ISO/IEC 13818-6 Synchronized Download Protocol" },
{ 0x15, "Metadata carried in PES packets" },
{ 0x16, "Metadata carried in metadata sections" },
{ 0x17, "Metadata carried in ISO/IEC 13818-6 Data Carousel" },
{ 0x18, "Metadata carried in ISO/IEC 13818-6 Object Carousel" },
{ 0x19, "Metadata carried in ISO/IEC 13818-6 Synchronized Download Protocol" },
{ 0x1A, "IPMP stream (defined in ISO/IEC 13818-11, MPEG-2 IPMP)" },
{ 0x1B, "AVC video stream as defined in ITU-T Rec. H.264 | ISO/IEC 14496-10 Video" },
{ 0x24, "ITU-T Rec. H.265 and ISO/IEC 23008-2 (Ultra HD video) in a packetized stream" },
{ 0x7F, "IPMP stream" },
{ 0x81, "ATSC A/52 Audio" },
{ 0x86, "SCTE-35 Splice Information" },
{ 0xA1, "ETV-AM BIF Data Stream" },
{ 0xC0, "ETV-AM EISS Signaling" },
{ 0x00, NULL }
};
value_string_ext mpeg_pmt_stream_type_vals_ext = VALUE_STRING_EXT_INIT(mpeg_pmt_stream_type_vals);
static int
dissect_mpeg_pmt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
guint offset = 0, length = 0;
guint prog_info_len, es_info_len;
guint16 pid;
proto_item *ti;
proto_tree *mpeg_pmt_tree;
proto_tree *mpeg_pmt_stream_tree;
/* The TVB should start right after the section_length in the Section packet */
col_set_str(pinfo->cinfo, COL_INFO, "Program Map Table (PMT)");
ti = proto_tree_add_item(tree, proto_mpeg_pmt, tvb, offset, -1, ENC_NA);
mpeg_pmt_tree = proto_item_add_subtree(ti, ett_mpeg_pmt);
offset += packet_mpeg_sect_header(tvb, offset, mpeg_pmt_tree, &length, NULL);
length -= 4;
proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_program_number, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_reserved1, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_version_number, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_current_next_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_reserved2, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_pcr_pid, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
prog_info_len = tvb_get_ntohs(tvb, offset) & MPEG_PMT_PROGRAM_INFO_LENGTH_MASK;
proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_reserved3, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(mpeg_pmt_tree, hf_mpeg_pmt_program_info_length, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, prog_info_len, mpeg_pmt_tree);
while (offset < length) {
pid = tvb_get_ntohs(tvb, offset + 1) & MPEG_PMT_STREAM_ELEMENTARY_PID_MASK;
es_info_len = tvb_get_ntohs(tvb, offset + 3) & MPEG_PMT_STREAM_ES_INFO_LENGTH_MASK;
mpeg_pmt_stream_tree = proto_tree_add_subtree_format(mpeg_pmt_tree, tvb, offset, 5 + es_info_len,
ett_mpeg_pmt_stream, NULL, "Stream PID=0x%04hx", pid);
proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_type, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_reserved1, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_elementary_pid, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_reserved2, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(mpeg_pmt_stream_tree, hf_mpeg_pmt_stream_es_info_length, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, es_info_len, mpeg_pmt_stream_tree);
}
offset += packet_mpeg_sect_crc(tvb, pinfo, mpeg_pmt_tree, 0, offset);
proto_item_set_len(ti, offset);
return offset;
}
void
proto_register_mpeg_pmt(void)
{
static hf_register_info hf[] = {
{ &hf_mpeg_pmt_program_number, {
"Program Number", "mpeg_pmt.pg_num",
FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
} },
{ &hf_mpeg_pmt_reserved1, {
"Reserved", "mpeg_pmt.reserved1",
FT_UINT8, BASE_HEX, NULL, MPEG_PMT_RESERVED1_MASK, NULL, HFILL
} },
{ &hf_mpeg_pmt_version_number, {
"Version Number", "mpeg_pmt.version",
FT_UINT8, BASE_HEX, NULL, MPEG_PMT_VERSION_NUMBER_MASK, NULL, HFILL
} },
{ &hf_mpeg_pmt_current_next_indicator, {
"Current/Next Indicator", "mpeg_pmt.cur_next_ind",
FT_UINT8, BASE_HEX, VALS(mpeg_pmt_cur_next_vals), MPEG_PMT_CURRENT_NEXT_INDICATOR_MASK, NULL, HFILL
} },
{ &hf_mpeg_pmt_section_number, {
"Section Number", "mpeg_pmt.sect_num",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
} },
{ &hf_mpeg_pmt_last_section_number, {
"Last Section Number", "mpeg_pmt.last_sect_num",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
} },
{ &hf_mpeg_pmt_reserved2, {
"Reserved", "mpeg_pmt.reserved2",
FT_UINT16, BASE_HEX, NULL, MPEG_PMT_RESERVED2_MASK, NULL, HFILL
} },
{ &hf_mpeg_pmt_pcr_pid, {
"PCR PID", "mpeg_pmt.pcr_pid",
FT_UINT16, BASE_HEX, NULL, MPEG_PMT_PCR_PID_MASK, NULL, HFILL
} },
{ &hf_mpeg_pmt_reserved3, {
"Reserved", "mpeg_pmt.reserved3",
FT_UINT16, BASE_HEX, NULL, MPEG_PMT_RESERVED3_MASK, NULL, HFILL
} },
{ &hf_mpeg_pmt_program_info_length, {
"Program Info Length", "mpeg_pmt.prog_info_len",
FT_UINT16, BASE_DEC, NULL, MPEG_PMT_PROGRAM_INFO_LENGTH_MASK, NULL, HFILL
} },
{ &hf_mpeg_pmt_stream_type, {
"Stream type", "mpeg_pmt.stream.type",
FT_UINT8, BASE_HEX | BASE_EXT_STRING, &mpeg_pmt_stream_type_vals_ext, 0, NULL, HFILL
} },
{ &hf_mpeg_pmt_stream_reserved1, {
"Reserved", "mpeg_pmt.stream.reserved1",
FT_UINT16, BASE_HEX, NULL, MPEG_PMT_STREAM_RESERVED1_MASK, NULL, HFILL
} },
{ &hf_mpeg_pmt_stream_elementary_pid, {
"Elementary PID", "mpeg_pmt.stream.elementary_pid",
FT_UINT16, BASE_HEX, NULL, MPEG_PMT_STREAM_ELEMENTARY_PID_MASK, NULL, HFILL
} },
{ &hf_mpeg_pmt_stream_reserved2, {
"Reserved", "mpeg_pmt.stream.reserved2",
FT_UINT16, BASE_HEX, NULL, MPEG_PMT_STREAM_RESERVED2_MASK, NULL, HFILL
} },
{ &hf_mpeg_pmt_stream_es_info_length, {
"ES Info Length", "mpeg_pmt.stream.es_info_len",
FT_UINT16, BASE_DEC, NULL, MPEG_PMT_STREAM_ES_INFO_LENGTH_MASK, NULL, HFILL
} },
};
static gint *ett[] = {
&ett_mpeg_pmt,
&ett_mpeg_pmt_stream,
};
proto_mpeg_pmt = proto_register_protocol("MPEG2 Program Map Table", "MPEG PMT", "mpeg_pmt");
proto_register_field_array(proto_mpeg_pmt, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
mpeg_pmt_handle = register_dissector("mpeg_pmt", dissect_mpeg_pmt, proto_mpeg_pmt);
}
void
proto_reg_handoff_mpeg_pmt(void)
{
dissector_add_uint("mpeg_sect.tid", MPEG_PMT_TID, mpeg_pmt_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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