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/* packet-dvb-bat.c
* Routines for DVB (ETSI EN 300 468) Bouquet Association Table (BAT) 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_dvb_bat(void);
void proto_reg_handoff_dvb_bat(void);
static dissector_handle_t dvb_bat_handle;
static int proto_dvb_bat = -1;
static int hf_dvb_bat_bouquet_id = -1;
static int hf_dvb_bat_reserved1 = -1;
static int hf_dvb_bat_version_number = -1;
static int hf_dvb_bat_current_next_indicator = -1;
static int hf_dvb_bat_section_number = -1;
static int hf_dvb_bat_last_section_number = -1;
static int hf_dvb_bat_reserved2 = -1;
static int hf_dvb_bat_bouquet_descriptors_length = -1;
static int hf_dvb_bat_reserved3 = -1;
static int hf_dvb_bat_transport_stream_loop_length = -1;
static int hf_dvb_bat_transport_stream_id = -1;
static int hf_dvb_bat_original_network_id = -1;
static int hf_dvb_bat_reserved4 = -1;
static int hf_dvb_bat_transport_descriptors_length = -1;
static gint ett_dvb_bat = -1;
static gint ett_dvb_bat_transport_stream = -1;
#define DVB_BAT_RESERVED1_MASK 0xC0
#define DVB_BAT_VERSION_NUMBER_MASK 0x3E
#define DVB_BAT_CURRENT_NEXT_INDICATOR_MASK 0x01
#define DVB_BAT_RESERVED2_MASK 0xF000
#define DVB_BAT_BOUQUET_DESCRIPTORS_LENGTH_MASK 0x0FFF
#define DVB_BAT_RESERVED3_MASK 0xF000
#define DVB_BAT_TRANSPORT_STREAM_LOOP_LENGTH_MASK 0x0FFF
#define DVB_BAT_RESERVED4_MASK 0xF000
#define DVB_BAT_TRANSPORT_DESCRIPTORS_LENGTH_MASK 0x0FFF
static const value_string dvb_bat_cur_next_vals[] = {
{ 0, "Not yet applicable" },
{ 1, "Currently applicable" },
{ 0, NULL }
};
#if 0
static const value_string dvb_bat_running_status_vals[] = {
{ 0, "Undefined" },
{ 1, "Not Running" },
{ 2, "Starts in a few seconds" },
{ 3, "Pausing" },
{ 4, "Running" },
{ 5, "Service off-air" },
{ 0, NULL }
};
static const value_string dvb_bat_free_ca_mode_vals[] = {
{ 0, "Not Scrambled" },
{ 1, "One or more component scrambled" },
{ 0, NULL }
};
#endif
static int
dissect_dvb_bat(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
guint offset = 0, length = 0, ts_loop_end;
guint16 ts_id, descriptor_len, ts_loop_len;
proto_item *ti;
proto_tree *dvb_bat_tree;
proto_tree *transport_stream_tree;
col_set_str(pinfo->cinfo, COL_INFO, "Bouquet Association Table (BAT)");
ti = proto_tree_add_item(tree, proto_dvb_bat, tvb, offset, -1, ENC_NA);
dvb_bat_tree = proto_item_add_subtree(ti, ett_dvb_bat);
offset += packet_mpeg_sect_header(tvb, offset, dvb_bat_tree, &length, NULL);
length -= 4;
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_bouquet_id, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_reserved1, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_version_number, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_current_next_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
descriptor_len = tvb_get_ntohs(tvb, offset) & DVB_BAT_BOUQUET_DESCRIPTORS_LENGTH_MASK;
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_reserved2, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_bouquet_descriptors_length, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, descriptor_len, dvb_bat_tree);
ts_loop_len = tvb_get_ntohs(tvb, offset) & DVB_BAT_TRANSPORT_STREAM_LOOP_LENGTH_MASK;
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_reserved3, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(dvb_bat_tree, hf_dvb_bat_transport_stream_loop_length, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
ts_loop_end = offset + ts_loop_len;
while (offset < ts_loop_end) {
ts_id = tvb_get_ntohs(tvb, offset);
descriptor_len = tvb_get_ntohs(tvb, offset + 4) & DVB_BAT_TRANSPORT_DESCRIPTORS_LENGTH_MASK;
transport_stream_tree = proto_tree_add_subtree_format(dvb_bat_tree, tvb, offset, 6 + descriptor_len,
ett_dvb_bat_transport_stream, NULL, "Transport Stream 0x%04x", ts_id);
proto_tree_add_item(transport_stream_tree, hf_dvb_bat_transport_stream_id, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(transport_stream_tree, hf_dvb_bat_original_network_id, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(transport_stream_tree, hf_dvb_bat_reserved4, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(transport_stream_tree, hf_dvb_bat_transport_descriptors_length, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, descriptor_len, transport_stream_tree);
}
offset += packet_mpeg_sect_crc(tvb, pinfo, dvb_bat_tree, 0, offset);
proto_item_set_len(ti, offset);
return tvb_captured_length(tvb);
}
void
proto_register_dvb_bat(void)
{
static hf_register_info hf[] = {
{ &hf_dvb_bat_bouquet_id, {
"Bouquet ID", "dvb_bat.bouquet_id",
FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
} },
{ &hf_dvb_bat_reserved1, {
"Reserved", "dvb_bat.reserved1",
FT_UINT8, BASE_HEX, NULL, DVB_BAT_RESERVED1_MASK, NULL, HFILL
} },
{ &hf_dvb_bat_version_number, {
"Version Number", "dvb_bat.version",
FT_UINT8, BASE_HEX, NULL, DVB_BAT_VERSION_NUMBER_MASK, NULL, HFILL
} },
{ &hf_dvb_bat_current_next_indicator, {
"Current/Next Indicator", "dvb_bat.cur_next_ind",
FT_UINT8, BASE_DEC, VALS(dvb_bat_cur_next_vals), DVB_BAT_CURRENT_NEXT_INDICATOR_MASK, NULL, HFILL
} },
{ &hf_dvb_bat_section_number, {
"Section Number", "dvb_bat.sect_num",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
} },
{ &hf_dvb_bat_last_section_number, {
"Last Section Number", "dvb_bat.last_sect_num",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
} },
{ &hf_dvb_bat_reserved2, {
"Reserved", "dvb_bat.reserved2",
FT_UINT16, BASE_HEX, NULL, DVB_BAT_RESERVED2_MASK, NULL, HFILL
} },
{ &hf_dvb_bat_bouquet_descriptors_length, {
"Bouquet Descriptors Length", "dvb_bat.bouquet_desc_len",
FT_UINT16, BASE_DEC, NULL, DVB_BAT_BOUQUET_DESCRIPTORS_LENGTH_MASK, NULL, HFILL
} },
{ &hf_dvb_bat_reserved3, {
"Reserved", "dvb_bat.reserved3",
FT_UINT16, BASE_HEX, NULL, DVB_BAT_RESERVED3_MASK, NULL, HFILL
} },
{ &hf_dvb_bat_transport_stream_loop_length, {
"Transport Stream Loop Length", "dvb_bat.ts_loop_len",
FT_UINT16, BASE_DEC, NULL, DVB_BAT_TRANSPORT_STREAM_LOOP_LENGTH_MASK, NULL, HFILL
} },
{ &hf_dvb_bat_transport_stream_id, {
"Transport Stream ID", "dvb_bat.ts.id",
FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
} },
{ &hf_dvb_bat_original_network_id, {
"Original Network ID", "dvb_bat.ts.original_nid",
FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
} },
{ &hf_dvb_bat_reserved4, {
"Reserved", "dvb_bat.ts.reserved",
FT_UINT16, BASE_HEX, NULL, DVB_BAT_RESERVED4_MASK, NULL, HFILL
} },
{ &hf_dvb_bat_transport_descriptors_length, {
"Bouquet Descriptors Length", "dvb_bat.ts.desc_len",
FT_UINT16, BASE_DEC, NULL, DVB_BAT_BOUQUET_DESCRIPTORS_LENGTH_MASK, NULL, HFILL
} },
};
static gint *ett[] = {
&ett_dvb_bat,
&ett_dvb_bat_transport_stream
};
proto_dvb_bat = proto_register_protocol("DVB Bouquet Association Table", "DVB BAT", "dvb_bat");
dvb_bat_handle = register_dissector("dvb_bat", dissect_dvb_bat, proto_dvb_bat);
proto_register_field_array(proto_dvb_bat, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void proto_reg_handoff_dvb_bat(void)
{
dissector_add_uint("mpeg_sect.tid", DVB_BAT_TID, dvb_bat_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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