From e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 10 Apr 2024 22:34:10 +0200 Subject: Adding upstream version 4.2.2. Signed-off-by: Daniel Baumann --- epan/dissectors/packet-dvb-sit.c | 233 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 233 insertions(+) create mode 100644 epan/dissectors/packet-dvb-sit.c (limited to 'epan/dissectors/packet-dvb-sit.c') diff --git a/epan/dissectors/packet-dvb-sit.c b/epan/dissectors/packet-dvb-sit.c new file mode 100644 index 0000000..26b50ea --- /dev/null +++ b/epan/dissectors/packet-dvb-sit.c @@ -0,0 +1,233 @@ +/* packet-dvb-sit.c + * Routines for DVB (ETSI EN 300 468) Selection Information Table (SIT) dissection + * Copyright 2021, Roman Volkov + * + * Wireshark - Network traffic analyzer + * By Gerald Combs + * Copyright 1998 Gerald Combs + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "config.h" + +#include +#include "packet-mpeg-sect.h" +#include "packet-mpeg-descriptor.h" + +void proto_register_dvb_sit(void); +void proto_reg_handoff_dvb_sit(void); + +static dissector_handle_t dvb_sit_handle; + +static int proto_dvb_sit = -1; + +static int hf_dvb_sit_reserved_future_use1 = -1; +static int hf_dvb_sit_reserved = -1; +static int hf_dvb_sit_version_number = -1; +static int hf_dvb_sit_current_next_indicator = -1; +static int hf_dvb_sit_section_number = -1; +static int hf_dvb_sit_last_section_number = -1; +static int hf_dvb_sit_reserved_future_use2 = -1; +static int hf_dvb_sit_transmission_info_len = -1; +static int hf_dvb_sit_service_id = -1; +static int hf_dvb_sit_reserved_future_use3 = -1; +static int hf_dvb_sit_running_status = -1; +static int hf_dvb_sit_service_descriptors_length = -1; + +static gint ett_dvb_sit = -1; +static gint ett_dvb_sit_service = -1; + +#define DVB_SIT_RESERVED_MASK 0xC0 +#define DVB_SIT_VERSION_NUMBER_MASK 0x3E +#define DVB_SIT_CURRENT_NEXT_INDICATOR_MASK 0x01 + +#define DVB_SIT_RESERVED_FUTURE_USE2_MASK 0xF000 +#define DVB_SIT_TRANSMISSION_INFO_MASK 0x0FFF + +#define DVB_SIT_RESERVED_FUTURE_USE3_MASK 0x8000 +#define DVB_SIT_RUNNING_STATUS_MASK 0x7000 +#define DVB_SIT_SERVICE_DESCRIPTORS_LENGTH_MASK 0x0FFF + +static const value_string dvb_sit_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 int +dissect_dvb_sit(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) +{ + + guint offset = 0, length = 0; + guint descriptor_len; + guint16 svc_id; + + proto_item *ti; + proto_tree *dvb_sit_tree; + proto_tree *dvb_sit_service_tree; + + /* The TVB should start right after the section_length in the Section packet */ + + col_set_str(pinfo->cinfo, COL_INFO, "Selection Information Table (SIT)"); + + ti = proto_tree_add_item(tree, proto_dvb_sit, tvb, offset, -1, ENC_NA); + dvb_sit_tree = proto_item_add_subtree(ti, ett_dvb_sit); + + offset += packet_mpeg_sect_header(tvb, offset, dvb_sit_tree, &length, NULL); + length -= 4; + + proto_tree_add_item(dvb_sit_tree, hf_dvb_sit_reserved_future_use1, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + proto_tree_add_item(dvb_sit_tree, hf_dvb_sit_reserved, tvb, offset, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dvb_sit_tree, hf_dvb_sit_version_number, tvb, offset, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dvb_sit_tree, hf_dvb_sit_current_next_indicator, tvb, offset, 1, ENC_BIG_ENDIAN); + offset += 1; + + proto_tree_add_item(dvb_sit_tree, hf_dvb_sit_section_number, tvb, offset, 1, ENC_BIG_ENDIAN); + offset += 1; + + proto_tree_add_item(dvb_sit_tree, hf_dvb_sit_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN); + offset += 1; + + descriptor_len = tvb_get_ntohs(tvb, offset) & DVB_SIT_TRANSMISSION_INFO_MASK; + proto_tree_add_item(dvb_sit_tree, hf_dvb_sit_reserved_future_use2, tvb, offset, 2, ENC_BIG_ENDIAN); + proto_tree_add_item(dvb_sit_tree, hf_dvb_sit_transmission_info_len, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, descriptor_len, dvb_sit_tree); + + if (offset >= length) + return offset; + + /* Parse all the services */ + while (offset < length) { + + svc_id = tvb_get_ntohs(tvb, offset); + dvb_sit_service_tree = proto_tree_add_subtree_format(dvb_sit_tree, tvb, offset, 5, + ett_dvb_sit_service, NULL, "Service 0x%04hx", svc_id); + + proto_tree_add_item(dvb_sit_service_tree, hf_dvb_sit_service_id, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + proto_tree_add_item(dvb_sit_service_tree, hf_dvb_sit_reserved_future_use3, tvb, offset, 2, ENC_BIG_ENDIAN); + proto_tree_add_item(dvb_sit_service_tree, hf_dvb_sit_running_status, tvb, offset, 2, ENC_BIG_ENDIAN); + proto_tree_add_item(dvb_sit_service_tree, hf_dvb_sit_service_descriptors_length, tvb, offset, 2, ENC_BIG_ENDIAN); + descriptor_len = tvb_get_ntohs(tvb, offset) & DVB_SIT_SERVICE_DESCRIPTORS_LENGTH_MASK; + offset += 2; + + offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, descriptor_len, dvb_sit_service_tree); + } + + offset += packet_mpeg_sect_crc(tvb, pinfo, dvb_sit_tree, 0, offset); + proto_item_set_len(ti, offset); + return tvb_captured_length(tvb); +} + + +void +proto_register_dvb_sit(void) +{ + + static hf_register_info hf[] = { + + { &hf_dvb_sit_reserved_future_use1, { + "Reserved", "dvb_sit.reserved_future_use1", + FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_sit_reserved, { + "Reserved", "dvb_sit.reserved", + FT_UINT8, BASE_HEX, NULL, DVB_SIT_RESERVED_MASK, NULL, HFILL + } }, + + { &hf_dvb_sit_version_number, { + "Version Number", "dvb_sit.version", + FT_UINT8, BASE_HEX, NULL, DVB_SIT_VERSION_NUMBER_MASK, NULL, HFILL + } }, + + { &hf_dvb_sit_current_next_indicator, { + "Current/Next Indicator", "dvb_sit.cur_next_ind", + FT_BOOLEAN, 8, TFS(&tfs_current_not_yet), DVB_SIT_CURRENT_NEXT_INDICATOR_MASK, NULL, HFILL + } }, + + { &hf_dvb_sit_section_number, { + "Section Number", "dvb_sit.sect_num", + FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_sit_last_section_number, { + "Last Section Number", "dvb_sit.last_sect_num", + FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_sit_reserved_future_use2, { + "Reserved", "dvb_sit.reserved_future_use2", + FT_UINT16, BASE_HEX, NULL, DVB_SIT_RESERVED_FUTURE_USE2_MASK, NULL, HFILL + } }, + + { &hf_dvb_sit_transmission_info_len, { + "Transmission Info Descriptors Length", "dvb_sit.transmission_info_descriptors_length", + FT_UINT16, BASE_DEC, NULL, DVB_SIT_TRANSMISSION_INFO_MASK, NULL, HFILL + } }, + + { &hf_dvb_sit_service_id, { + "Service ID", "dvb_sit.svc.id", + FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_sit_reserved_future_use3, { + "Reserved", "dvb_sit.svc.reserved_future_use3", + FT_UINT16, BASE_HEX, NULL, DVB_SIT_RESERVED_FUTURE_USE3_MASK, NULL, HFILL + } }, + + { &hf_dvb_sit_running_status, { + "Running Status", "dvb_sit.svc.running_status", + FT_UINT16, BASE_HEX, VALS(dvb_sit_running_status_vals), DVB_SIT_RUNNING_STATUS_MASK, NULL, HFILL + } }, + + { &hf_dvb_sit_service_descriptors_length, { + "Service Descriptors Length", "dvb_sit.svc.service_descriptors_length", + FT_UINT16, BASE_DEC, NULL, DVB_SIT_SERVICE_DESCRIPTORS_LENGTH_MASK, NULL, HFILL + } } + + }; + + static gint *ett[] = { + &ett_dvb_sit, + &ett_dvb_sit_service + }; + + proto_dvb_sit = proto_register_protocol("DVB Selection Information Table", "DVB SIT", "dvb_sit"); + dvb_sit_handle = register_dissector("dvb_sit", dissect_dvb_sit, proto_dvb_sit); + + proto_register_field_array(proto_dvb_sit, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + +} + + +void proto_reg_handoff_dvb_sit(void) +{ + dissector_add_uint("mpeg_sect.tid", DVB_SIT_TID, dvb_sit_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: + */ -- cgit v1.2.3