epan/dissectors/pidl/samr/samr.cnf cnf_dissect_lsa_BinaryString => lsarpc_dissect_str...
[wireshark-sm.git] / epan / dissectors / packet-dvb-sdt.c
blob208fcce3409c7ef5fd0a1dbffd08d9ec4af26870
1 /* packet-mpeg-sdt.c
2 * Routines for DVB (ETSI EN 300 468) Servide Description Table (SDT) dissection
3 * Copyright 2012, Guy Martin <gmsoft@tuxicoman.be>
5 * Wireshark - Network traffic analyzer
6 * By Gerald Combs <gerald@wireshark.org>
7 * Copyright 1998 Gerald Combs
9 * SPDX-License-Identifier: GPL-2.0-or-later
12 #include "config.h"
14 #include <epan/packet.h>
15 #include <epan/tfs.h>
16 #include "packet-mpeg-sect.h"
17 #include "packet-mpeg-descriptor.h"
19 void proto_register_dvb_sdt(void);
20 void proto_reg_handoff_dvb_sdt(void);
22 static dissector_handle_t dvb_sdt_handle;
24 static int proto_dvb_sdt;
25 static int hf_dvb_sdt_transport_stream_id;
26 static int hf_dvb_sdt_reserved1;
27 static int hf_dvb_sdt_version_number;
28 static int hf_dvb_sdt_current_next_indicator;
29 static int hf_dvb_sdt_section_number;
30 static int hf_dvb_sdt_last_section_number;
32 static int hf_dvb_sdt_original_network_id;
33 static int hf_dvb_sdt_reserved2;
35 static int hf_dvb_sdt_service_id;
36 static int hf_dvb_sdt_reserved3;
37 static int hf_dvb_sdt_eit_schedule_flag;
38 static int hf_dvb_sdt_eit_present_following_flag;
39 static int hf_dvb_sdt_running_status;
40 static int hf_dvb_sdt_free_ca_mode;
41 static int hf_dvb_sdt_descriptors_loop_length;
43 static int ett_dvb_sdt;
44 static int ett_dvb_sdt_service;
46 #define DVB_SDT_RESERVED1_MASK 0xC0
47 #define DVB_SDT_VERSION_NUMBER_MASK 0x3E
48 #define DVB_SDT_CURRENT_NEXT_INDICATOR_MASK 0x01
50 #define DVB_SDT_RESERVED3_MASK 0xFC
51 #define DVB_SDT_EIT_SCHEDULE_FLAG_MASK 0x02
52 #define DVB_SDT_EIT_PRESENT_FOLLOWING_FLAG_MASK 0x01
54 #define DVB_SDT_RUNNING_STATUS_MASK 0xE000
55 #define DVB_SDT_FREE_CA_MODE_MASK 0x1000
56 #define DVB_SDT_DESCRIPTORS_LOOP_LENGTH_MASK 0x0FFF
58 static const value_string dvb_sdt_running_status_vals[] = {
59 { 0, "Undefined" },
60 { 1, "Not Running" },
61 { 2, "Starts in a few seconds" },
62 { 3, "Pausing" },
63 { 4, "Running" },
64 { 5, "Service off-air" },
66 { 0, NULL }
69 static const value_string dvb_sdt_free_ca_mode_vals[] = {
70 { 0, "Not Scrambled" },
71 { 1, "One or more component scrambled" },
73 { 0, NULL }
76 static int
77 dissect_dvb_sdt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
80 unsigned offset = 0, length = 0;
81 unsigned descriptor_len;
82 uint16_t svc_id;
84 proto_item *ti;
85 proto_tree *dvb_sdt_tree;
86 proto_tree *dvb_sdt_service_tree;
88 /* The TVB should start right after the section_length in the Section packet */
90 col_set_str(pinfo->cinfo, COL_INFO, "Service Description Table (SDT)");
92 ti = proto_tree_add_item(tree, proto_dvb_sdt, tvb, offset, -1, ENC_NA);
93 dvb_sdt_tree = proto_item_add_subtree(ti, ett_dvb_sdt);
95 offset += packet_mpeg_sect_header(tvb, offset, dvb_sdt_tree, &length, NULL);
96 length -= 4;
98 proto_tree_add_item(dvb_sdt_tree, hf_dvb_sdt_transport_stream_id, tvb, offset, 2, ENC_BIG_ENDIAN);
99 offset += 2;
101 proto_tree_add_item(dvb_sdt_tree, hf_dvb_sdt_reserved1, tvb, offset, 1, ENC_BIG_ENDIAN);
102 proto_tree_add_item(dvb_sdt_tree, hf_dvb_sdt_version_number, tvb, offset, 1, ENC_BIG_ENDIAN);
103 proto_tree_add_item(dvb_sdt_tree, hf_dvb_sdt_current_next_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
104 offset += 1;
106 proto_tree_add_item(dvb_sdt_tree, hf_dvb_sdt_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
107 offset += 1;
109 proto_tree_add_item(dvb_sdt_tree, hf_dvb_sdt_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
110 offset += 1;
112 proto_tree_add_item(dvb_sdt_tree, hf_dvb_sdt_original_network_id, tvb, offset, 2, ENC_BIG_ENDIAN);
113 offset += 2;
115 proto_tree_add_item(dvb_sdt_tree, hf_dvb_sdt_reserved2, tvb, offset, 1, ENC_BIG_ENDIAN);
116 offset += 1;
119 if (offset >= length)
120 return offset;
122 /* Parse all the services */
123 while (offset < length) {
125 svc_id = tvb_get_ntohs(tvb, offset);
126 dvb_sdt_service_tree = proto_tree_add_subtree_format(dvb_sdt_tree, tvb, offset, 5,
127 ett_dvb_sdt_service, NULL, "Service 0x%04hx", svc_id);
129 proto_tree_add_item(dvb_sdt_service_tree, hf_dvb_sdt_service_id, tvb, offset, 2, ENC_BIG_ENDIAN);
130 offset += 2;
132 proto_tree_add_item(dvb_sdt_service_tree, hf_dvb_sdt_reserved3, tvb, offset, 1, ENC_BIG_ENDIAN);
133 proto_tree_add_item(dvb_sdt_service_tree, hf_dvb_sdt_eit_schedule_flag, tvb, offset, 1, ENC_BIG_ENDIAN);
134 proto_tree_add_item(dvb_sdt_service_tree, hf_dvb_sdt_eit_present_following_flag, tvb, offset, 1, ENC_BIG_ENDIAN);
135 offset += 1;
137 proto_tree_add_item(dvb_sdt_service_tree, hf_dvb_sdt_running_status, tvb, offset, 2, ENC_BIG_ENDIAN);
138 proto_tree_add_item(dvb_sdt_service_tree, hf_dvb_sdt_free_ca_mode, tvb, offset, 2, ENC_BIG_ENDIAN);
139 proto_tree_add_item(dvb_sdt_service_tree, hf_dvb_sdt_descriptors_loop_length, tvb, offset, 2, ENC_BIG_ENDIAN);
140 descriptor_len = tvb_get_ntohs(tvb, offset) & DVB_SDT_DESCRIPTORS_LOOP_LENGTH_MASK;
141 offset += 2;
143 offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, descriptor_len, dvb_sdt_service_tree);
146 offset += packet_mpeg_sect_crc(tvb, pinfo, dvb_sdt_tree, 0, offset);
147 proto_item_set_len(ti, offset);
148 return tvb_captured_length(tvb);
152 void
153 proto_register_dvb_sdt(void)
156 static hf_register_info hf[] = {
158 { &hf_dvb_sdt_transport_stream_id, {
159 "Transport Stream ID", "dvb_sdt.tsid",
160 FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
161 } },
163 { &hf_dvb_sdt_reserved1, {
164 "Reserved", "dvb_sdt.reserved1",
165 FT_UINT8, BASE_HEX, NULL, DVB_SDT_RESERVED1_MASK, NULL, HFILL
166 } },
168 { &hf_dvb_sdt_version_number, {
169 "Version Number", "dvb_sdt.version",
170 FT_UINT8, BASE_HEX, NULL, DVB_SDT_VERSION_NUMBER_MASK, NULL, HFILL
171 } },
173 { &hf_dvb_sdt_current_next_indicator, {
174 "Current/Next Indicator", "dvb_sdt.cur_next_ind",
175 FT_BOOLEAN, 8, TFS(&tfs_current_not_yet), DVB_SDT_CURRENT_NEXT_INDICATOR_MASK, NULL, HFILL
176 } },
178 { &hf_dvb_sdt_section_number, {
179 "Section Number", "dvb_sdt.sect_num",
180 FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
181 } },
183 { &hf_dvb_sdt_last_section_number, {
184 "Last Section Number", "dvb_sdt.last_sect_num",
185 FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
186 } },
188 { &hf_dvb_sdt_original_network_id, {
189 "Original Network ID", "dvb_sdt.original_nid",
190 FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
191 } },
193 { &hf_dvb_sdt_reserved2, {
194 "Reserved", "dvb_sdt.reserved2",
195 FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL
196 } },
199 { &hf_dvb_sdt_service_id, {
200 "Service ID", "dvb_sdt.svc.id",
201 FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
202 } },
204 { &hf_dvb_sdt_reserved3, {
205 "Reserved", "dvb_sdt.svc.reserved",
206 FT_UINT8, BASE_HEX, NULL, DVB_SDT_RESERVED3_MASK, NULL, HFILL
207 } },
209 { &hf_dvb_sdt_eit_schedule_flag, {
210 "EIT Schedule Flag", "dvb_sdt.svc.eit_schedule_flag",
211 FT_UINT8, BASE_DEC, NULL, DVB_SDT_EIT_SCHEDULE_FLAG_MASK, NULL, HFILL
212 } },
214 { &hf_dvb_sdt_eit_present_following_flag, {
215 "EIT Present Following Flag", "dvb_sdt.svc.eit_present_following_flag",
216 FT_UINT8, BASE_DEC, NULL, DVB_SDT_EIT_PRESENT_FOLLOWING_FLAG_MASK, NULL, HFILL
217 } },
219 { &hf_dvb_sdt_running_status, {
220 "Running Status", "dvb_sdt.svc.running_status",
221 FT_UINT16, BASE_HEX, VALS(dvb_sdt_running_status_vals), DVB_SDT_RUNNING_STATUS_MASK, NULL, HFILL
222 } },
224 { &hf_dvb_sdt_free_ca_mode, {
225 "Free CA Mode", "dvb_sdt.svc.free_ca_mode",
226 FT_UINT16, BASE_HEX, VALS(dvb_sdt_free_ca_mode_vals), DVB_SDT_FREE_CA_MODE_MASK, NULL, HFILL
227 } },
229 { &hf_dvb_sdt_descriptors_loop_length, {
230 "Descriptors Loop Length", "dvb_sdt.svc.descr_loop_len",
231 FT_UINT16, BASE_DEC, NULL, DVB_SDT_DESCRIPTORS_LOOP_LENGTH_MASK, NULL, HFILL
236 static int *ett[] = {
237 &ett_dvb_sdt,
238 &ett_dvb_sdt_service
241 proto_dvb_sdt = proto_register_protocol("DVB Service Description Table", "DVB SDT", "dvb_sdt");
243 proto_register_field_array(proto_dvb_sdt, hf, array_length(hf));
244 proto_register_subtree_array(ett, array_length(ett));
246 dvb_sdt_handle = register_dissector("dvb_sdt", dissect_dvb_sdt, proto_dvb_sdt);
250 void proto_reg_handoff_dvb_sdt(void)
252 dissector_add_uint("mpeg_sect.tid", DVB_SDT_TID_ACTUAL, dvb_sdt_handle);
253 dissector_add_uint("mpeg_sect.tid", DVB_SDT_TID_OTHER, dvb_sdt_handle);
258 * Editor modelines - https://www.wireshark.org/tools/modelines.html
260 * Local variables:
261 * c-basic-offset: 4
262 * tab-width: 8
263 * indent-tabs-mode: nil
264 * End:
266 * vi: set shiftwidth=4 tabstop=8 expandtab:
267 * :indentSize=4:tabSize=8:noTabs=true: