diff options
author | Jeff Morriss <jeff.morriss@ulticom.com> | 2012-03-25 01:49:23 +0000 |
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committer | Jeff Morriss <jeff.morriss@ulticom.com> | 2012-03-25 01:49:23 +0000 |
commit | 254bf21caf3d1de0f818b9d253b1364eb480aa02 (patch) | |
tree | fad3beb1eb6a78c740c1847c128f71b02899dbcc /epan/dissectors/packet-dvb-sdt.c | |
parent | 5eab81456d2ef1abf9f1c2a5a4198747fd04a791 (diff) |
From Guy Martin via https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6993 :
This patch adds support for DVB Service Description Table as documented in
ETSI EN 300 468.
svn path=/trunk/; revision=41756
Diffstat (limited to 'epan/dissectors/packet-dvb-sdt.c')
-rw-r--r-- | epan/dissectors/packet-dvb-sdt.c | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/epan/dissectors/packet-dvb-sdt.c b/epan/dissectors/packet-dvb-sdt.c new file mode 100644 index 0000000000..eae8a341e4 --- /dev/null +++ b/epan/dissectors/packet-dvb-sdt.c @@ -0,0 +1,285 @@ +/* packet-mpeg-sdt.c + * Routines for DVB (ETSI EN 300 468) Servide Description Table (SDT) dissection + * Copyright 2012, Guy Martin <gmsoft@tuxicoman.be> + * + * $Id$ + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; sdther version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <glib.h> + +#include <epan/packet.h> +#include <epan/dissectors/packet-mpeg-sect.h> + +#include "packet-mpeg-descriptor.h" + +static int proto_dvb_sdt = -1; +static int hf_dvb_sdt_transport_stream_id = -1; +static int hf_dvb_sdt_reserved1 = -1; +static int hf_dvb_sdt_version_number = -1; +static int hf_dvb_sdt_current_next_indicator = -1; +static int hf_dvb_sdt_section_number = -1; +static int hf_dvb_sdt_last_section_number = -1; + +static int hf_dvb_sdt_original_network_id = -1; +static int hf_dvb_sdt_reserved2 = -1; + +static int hf_dvb_sdt_service_id = -1; +static int hf_dvb_sdt_reserved3 = -1; +static int hf_dvb_sdt_eit_schedule_flag = -1; +static int hf_dvb_sdt_eit_present_following_flag = -1; +static int hf_dvb_sdt_running_status = -1; +static int hf_dvb_sdt_free_ca_mode = -1; +static int hf_dvb_sdt_descriptors_loop_length = -1; + +static gint ett_dvb_sdt = -1; +static gint ett_dvb_sdt_service = -1; + +#define DVB_SDT_TID_ACTUAL 0x42 +#define DVB_SDT_TID_OTHER 0x46 + +#define DVB_SDT_RESERVED1_MASK 0xC0 +#define DVB_SDT_VERSION_NUMBER_MASK 0x3E +#define DVB_SDT_CURRENT_NEXT_INDICATOR_MASK 0x01 + +#define DVB_SDT_RESERVED3_MASK 0xFC +#define DVB_SDT_EIT_SCHEDULE_FLAG_MASK 0x02 +#define DVB_SDT_EIT_PRESENT_FOLLOWING_FLAG_MASK 0x01 + +#define DVB_SDT_RUNNING_STATUS_MASK 0xE000 +#define DVB_SDT_FREE_CA_MODE_MASK 0x1000 +#define DVB_SDT_DESCRIPTORS_LOOP_LENGTH_MASK 0x0FFF + + +static const value_string dvb_sdt_cur_next_vals[] = { + { 0, "Not yet applicable" }, + { 1, "Currently applicable" }, + + { 0, NULL } +}; + +static const value_string dvb_sdt_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_sdt_free_ca_mode_vals[] = { + { 0, "Not Scrambled" }, + { 1, "One or more component scrambled" }, + + { 0, NULL } +}; + +static void +dissect_dvb_sdt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + + guint offset = 0, length = 0, descriptor_end = 0; + guint16 svc_id = 0, descriptor_len = 0; + + proto_item *ti = NULL; + proto_tree *dvb_sdt_tree = NULL; + proto_item *si = NULL; + proto_tree *dvb_sdt_service_tree = NULL; + + /* The TVB should start right after the section_length in the Section packet */ + + col_clear(pinfo->cinfo, COL_INFO); + col_set_str(pinfo->cinfo, COL_INFO, "Service Description Table (SDT)"); + + if (!tree) + return; + + ti = proto_tree_add_item(tree, proto_dvb_sdt, tvb, offset, -1, ENC_NA); + dvb_sdt_tree = proto_item_add_subtree(ti, ett_dvb_sdt); + + offset += packet_mpeg_sect_header(tvb, offset, dvb_sdt_tree, &length, NULL); + length -= 4; + + proto_tree_add_item(dvb_sdt_tree, hf_dvb_sdt_transport_stream_id, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + proto_tree_add_item(dvb_sdt_tree, hf_dvb_sdt_reserved1, tvb, offset, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dvb_sdt_tree, hf_dvb_sdt_version_number, tvb, offset, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dvb_sdt_tree, hf_dvb_sdt_current_next_indicator, tvb, offset, 1, ENC_BIG_ENDIAN); + offset++; + + proto_tree_add_item(dvb_sdt_tree, hf_dvb_sdt_section_number, tvb, offset, 1, ENC_BIG_ENDIAN); + offset++; + + proto_tree_add_item(dvb_sdt_tree, hf_dvb_sdt_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN); + offset++; + + proto_tree_add_item(dvb_sdt_tree, hf_dvb_sdt_original_network_id, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + proto_tree_add_item(dvb_sdt_tree, hf_dvb_sdt_reserved2, tvb, offset, 1, ENC_BIG_ENDIAN); + offset++; + + + if (offset >= length) + return; + + /* Parse all the services */ + while (offset < length) { + + svc_id = tvb_get_ntohs(tvb, offset); + si = proto_tree_add_text(dvb_sdt_tree, tvb, offset, 5, "Service 0x%04hx", svc_id); + dvb_sdt_service_tree = proto_item_add_subtree(si, ett_dvb_sdt_service); + + proto_tree_add_item(dvb_sdt_service_tree, hf_dvb_sdt_service_id, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + proto_tree_add_item(dvb_sdt_service_tree, hf_dvb_sdt_reserved3, tvb, offset, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dvb_sdt_service_tree, hf_dvb_sdt_eit_schedule_flag, tvb, offset, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dvb_sdt_service_tree, hf_dvb_sdt_eit_present_following_flag, tvb, offset, 1, ENC_BIG_ENDIAN); + offset++; + + proto_tree_add_item(dvb_sdt_service_tree, hf_dvb_sdt_running_status, tvb, offset, 2, ENC_BIG_ENDIAN); + proto_tree_add_item(dvb_sdt_service_tree, hf_dvb_sdt_free_ca_mode, tvb, offset, 2, ENC_BIG_ENDIAN); + proto_tree_add_item(dvb_sdt_service_tree, hf_dvb_sdt_descriptors_loop_length, tvb, offset, 2, ENC_BIG_ENDIAN); + descriptor_len = tvb_get_ntohs(tvb, offset) & DVB_SDT_DESCRIPTORS_LOOP_LENGTH_MASK; + offset += 2; + + descriptor_end = offset + descriptor_len; + while (offset < descriptor_end) + offset += proto_mpeg_descriptor_dissect(tvb, offset, dvb_sdt_service_tree); + + } + + packet_mpeg_sect_crc(tvb, pinfo, dvb_sdt_tree, 0, offset); +} + + +void +proto_register_dvb_sdt(void) +{ + + static hf_register_info hf[] = { + + { &hf_dvb_sdt_transport_stream_id, { + "Transport Stream ID", "dvb_sdt.tsid", + FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_sdt_reserved1, { + "Reserved", "dvb_sdt.reserved1", + FT_UINT8, BASE_HEX, NULL, DVB_SDT_RESERVED1_MASK, NULL, HFILL + } }, + + { &hf_dvb_sdt_version_number, { + "Version Number", "dvb_sdt.version", + FT_UINT8, BASE_HEX, NULL, DVB_SDT_VERSION_NUMBER_MASK, NULL, HFILL + } }, + + { &hf_dvb_sdt_current_next_indicator, { + "Current/Next Indicator", "dvb_sdt.cur_next_ind", + FT_UINT8, BASE_DEC, VALS(dvb_sdt_cur_next_vals), DVB_SDT_CURRENT_NEXT_INDICATOR_MASK, NULL, HFILL + } }, + + { &hf_dvb_sdt_section_number, { + "Section Number", "dvb_sdt.sect_num", + FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_sdt_last_section_number, { + "Last Section Number", "dvb_sdt.last_sect_num", + FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_sdt_original_network_id, { + "Original Network ID", "dvb_sdt.original_nid", + FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_sdt_reserved2, { + "Reserved", "dvb_sdt.reserved2", + FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL + } }, + + + { &hf_dvb_sdt_service_id, { + "Service ID", "dvb_sdt.svc.id", + FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_sdt_reserved3, { + "Reserved", "dvb_sdt.svc.reserved", + FT_UINT8, BASE_HEX, NULL, DVB_SDT_RESERVED3_MASK, NULL, HFILL + } }, + + { &hf_dvb_sdt_eit_schedule_flag, { + "EIT Schedule Flag", "dvb_sdt.svc.eit_schedule_flag", + FT_UINT8, BASE_DEC, NULL, DVB_SDT_EIT_SCHEDULE_FLAG_MASK, NULL, HFILL + } }, + + { &hf_dvb_sdt_eit_present_following_flag, { + "EIT Present Following Flag", "dvb_sdt.svc.eit_present_following_flag", + FT_UINT8, BASE_DEC, NULL, DVB_SDT_EIT_PRESENT_FOLLOWING_FLAG_MASK, NULL, HFILL + } }, + + { &hf_dvb_sdt_running_status, { + "Running Status", "dvb_sdt.svc.running_status", + FT_UINT16, BASE_HEX, VALS(dvb_sdt_running_status_vals), DVB_SDT_RUNNING_STATUS_MASK, NULL, HFILL + } }, + + { &hf_dvb_sdt_free_ca_mode, { + "Free CA Mode", "dvb_sdt.svc.free_ca_mode", + FT_UINT16, BASE_HEX, VALS(dvb_sdt_free_ca_mode_vals), DVB_SDT_FREE_CA_MODE_MASK, NULL, HFILL + } }, + + { &hf_dvb_sdt_descriptors_loop_length, { + "Descriptors Loop Length", "dvb_sdt.svc.descr_loop_len", + FT_UINT16, BASE_HEX, NULL, DVB_SDT_DESCRIPTORS_LOOP_LENGTH_MASK, NULL, HFILL + } } + + }; + + static gint *ett[] = { + &ett_dvb_sdt, + &ett_dvb_sdt_service + }; + + proto_dvb_sdt = proto_register_protocol("DVB Service Description Table", "DVB SDT", "dvb_sdt"); + + proto_register_field_array(proto_dvb_sdt, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + +} + + +void proto_reg_handoff_dvb_sdt(void) +{ + dissector_handle_t dvb_sdt_handle; + + dvb_sdt_handle = create_dissector_handle(dissect_dvb_sdt, proto_dvb_sdt); + dissector_add_uint("mpeg_sect.tid", DVB_SDT_TID_ACTUAL, dvb_sdt_handle); + dissector_add_uint("mpeg_sect.tid", DVB_SDT_TID_OTHER, dvb_sdt_handle); +} |