Bug Summary

File:builds/wireshark/wireshark/epan/dissectors/packet-smpte-2038.c
Warning:line 127, column 17
Value stored to 'bit_offset' is never read

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name packet-smpte-2038.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -fno-delete-null-pointer-checks -mframe-pointer=all -relaxed-aliasing -fmath-errno -ffp-contract=on -fno-rounding-math -ffloat16-excess-precision=fast -fbfloat16-excess-precision=fast -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/builds/wireshark/wireshark/build -fcoverage-compilation-dir=/builds/wireshark/wireshark/build -resource-dir /usr/lib/llvm-22/lib/clang/22 -isystem /usr/include/glib-2.0 -isystem /usr/lib/x86_64-linux-gnu/glib-2.0/include -isystem /builds/wireshark/wireshark/epan/dissectors -isystem /builds/wireshark/wireshark/build/epan/dissectors -isystem /usr/include/mit-krb5 -isystem /usr/include/libxml2 -isystem /builds/wireshark/wireshark/epan -D CARES_NO_DEPRECATED -D G_DISABLE_DEPRECATED -D G_DISABLE_SINGLE_INCLUDES -D WS_BUILD_DLL -D WS_DEBUG -D WS_DEBUG_UTF_8 -I /builds/wireshark/wireshark/build -I /builds/wireshark/wireshark -I /builds/wireshark/wireshark/include -D _GLIBCXX_ASSERTIONS -internal-isystem /usr/lib/llvm-22/lib/clang/22/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/16/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/builds/wireshark/wireshark/= -fmacro-prefix-map=/builds/wireshark/wireshark/build/= -fmacro-prefix-map=../= -Wno-format-nonliteral -std=gnu17 -ferror-limit 19 -fvisibility=hidden -fwrapv -fwrapv-pointer -fstrict-flex-arrays=3 -stack-protector 2 -fstack-clash-protection -fcf-protection=full -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fexceptions -fcolor-diagnostics -analyzer-output=html -faddrsig -fdwarf2-cfi-asm -o /builds/wireshark/wireshark/sbout/2026-09-30-100354-3662-1 -x c /builds/wireshark/wireshark/epan/dissectors/packet-smpte-2038.c
1/* packet-smpte-2038.c
2 * SMPTE ST 2038:2021, "Carriage of Ancillary Data Packets in an MPEG-2 Transport Stream."
3 *
4 * Copyright (c) 2026, Devin Heitmueller <dheitmueller@ltnglobal.com>
5 *
6 * Wireshark - Network traffic analyzer
7 * By Gerald Combs <gerald@wireshark.org>
8 * Copyright 1998 Gerald Combs
9 *
10 *
11 * SPDX-License-Identifier: GPL-2.0-or-later
12 */
13
14#include "config.h"
15
16#include <epan/expert.h>
17#include <epan/packet.h>
18#include <epan/tfs.h>
19#include <wsutil/array.h>
20
21#include "packet-smpte-291-vanc.h"
22
23#define ST2038_REGISTRATION_ID0x56414e43U 0x56414e43U /* "VANC" */
24
25void proto_register_st2038(void);
26void proto_reg_handoff_st2038(void);
27
28static int proto_st2038;
29static dissector_handle_t st2038_handle;
30
31static int hf_st2038_anc_packet;
32static int hf_st2038_anc_count;
33static int hf_st2038_reserved;
34static int hf_st2038_c_not_y;
35static int hf_st2038_line_number;
36static int hf_st2038_horizontal_offset;
37static int hf_st2038_data_count;
38static int hf_st2038_udw_bytes;
39static int hf_st2038_udw_array;
40static int hf_st2038_checksum;
41static int hf_st2038_checksum_calculated;
42static int hf_st2038_alignment_bits;
43static int hf_st2038_stuffing_bytes;
44
45static int ett_st2038;
46static int ett_st2038_anc_packet;
47static int ett_st2038_udw;
48
49static expert_field ei_st2038_reserved;
50static expert_field ei_st2038_bad_parity;
51static expert_field ei_st2038_bad_checksum;
52static expert_field ei_st2038_bad_alignment;
53static expert_field ei_st2038_nonstandard_stuffing;
54static expert_field ei_st2038_multiple_lines;
55static expert_field ei_st2038_truncated;
56
57static const struct true_false_string tfs_c_not_y = {
58 "Color-difference channel (C)",
59 "Luminance channel (Y)"
60};
61
62static bool_Bool
63all_remaining_bytes_ff(tvbuff_t *tvb, unsigned byte_offset)
64{
65 unsigned len = tvb_captured_length(tvb);
66
67 for (unsigned i = byte_offset; i < len; i++) {
68 if (tvb_get_uint8(tvb, i) != 0xff)
69 return false0;
70 }
71 return true1;
72}
73
74/* SMPTE ST 2038:2021, Sec. 4.2, Table 2 -- ANC data PES payload record syntax. */
75static int
76dissect_st2038(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U___attribute__((unused)))
77{
78 unsigned captured_length = tvb_captured_length(tvb);
79 unsigned reported_length = tvb_reported_length(tvb);
80 unsigned total_bits = captured_length * 8U;
81 unsigned bit_offset = 0;
82 unsigned packet_index = 0;
83 int first_line = -1;
84 proto_item *root_ti;
85 proto_item *ti;
86 proto_tree *root;
87
88 col_set_str(pinfo->cinfo, COL_PROTOCOL, "ST 2038");
89 col_set_str(pinfo->cinfo, COL_INFO, "SMPTE ST 2038 ANC Data");
90
91 root_ti = proto_tree_add_item(tree, proto_st2038, tvb, 0, -1, ENC_NA0x00000000);
92 root = proto_item_add_subtree(root_ti, ett_st2038);
93
94 if (captured_length < reported_length) {
95 expert_add_info_format(pinfo, root_ti, &ei_st2038_truncated,
96 "ST 2038 payload reports %u bytes, but only %u were captured",
97 reported_length, captured_length);
98 }
99
100 while (bit_offset < total_bits) {
101 unsigned start_bit;
102 unsigned reserved;
103 unsigned line_number;
104 uint16_t did_word, second_word, dc_word;
105 uint8_t did, sdid_or_dbn;
106 bool_Bool type1;
107 unsigned data_count;
108 unsigned required_bits;
109 unsigned align_bits;
110 unsigned udw_start_bit;
111 unsigned udw_start_byte;
112 unsigned udw_octet_length;
113 uint16_t cs_calc;
114 st291_vanc_packet_t anc;
115 proto_item *packet_ti, *cs_ti, *udw_ti;
116 proto_tree *packet_tree, *udw_tree;
117
118 /* At a compliant record boundary, 0xff can only be trailing stuffing. */
119 if ((bit_offset & 7U) == 0 && bit_offset + 8 <= total_bits &&
120 tvb_get_uint8(tvb, bit_offset / 8) == 0xff) {
121 unsigned byte_offset = bit_offset / 8;
122 unsigned remaining = captured_length - byte_offset;
123
124 if (all_remaining_bytes_ff(tvb, byte_offset)) {
125 proto_tree_add_item(root, hf_st2038_stuffing_bytes, tvb,
126 byte_offset, remaining, ENC_NA0x00000000);
127 bit_offset = total_bits;
Value stored to 'bit_offset' is never read
128 break;
129 }
130
131 /*
132 * Interoperability workaround also used by libklvanc: some
133 * encoders insert extra '1' bits between ANC records even when
134 * Table 2 requires no alignment bits at an already byte-aligned
135 * boundary. Skip them until the next record's leading zero and
136 * flag the stream as non-conformant.
137 */
138 {
139 unsigned stuff_start = bit_offset;
140 while (bit_offset < total_bits &&
141 tvb_get_bits8(tvb, bit_offset, 1) == 1)
142 bit_offset++;
143
144 if (bit_offset > stuff_start) {
145 unsigned skipped = bit_offset - stuff_start;
146 unsigned shown = MIN(skipped, 64U)(((skipped) < (64U)) ? (skipped) : (64U));
147 ti = proto_tree_add_bits_item(root,
148 hf_st2038_alignment_bits, tvb, stuff_start,
149 shown, ENC_BIG_ENDIAN0x00000000);
150 if (skipped > shown)
151 proto_item_append_text(ti, " (showing first %u of %u bits)",
152 shown, skipped);
153 expert_add_info(pinfo, ti, &ei_st2038_nonstandard_stuffing);
154 }
155 }
156
157 if (bit_offset >= total_bits)
158 break;
159 }
160
161 start_bit = bit_offset;
162 required_bits = 6 + 1 + 11 + 12 + 10 + 10 + 10 + 10;
163 if (total_bits - bit_offset < required_bits) {
164 expert_add_info(pinfo, root_ti, &ei_st2038_truncated);
165 break;
166 }
167
168 reserved = tvb_get_bits8(tvb, bit_offset, 6);
169 bit_offset += 6;
170 bit_offset += 1;
171 line_number = tvb_get_bits16(tvb, bit_offset, 11, ENC_BIG_ENDIAN0x00000000);
172 bit_offset += 11;
173 bit_offset += 12;
174 if (!st291_vanc_packet_from_packed(tvb, pinfo, bit_offset,
175 total_bits - bit_offset, &anc)) {
176 expert_add_info(pinfo, root_ti, &ei_st2038_truncated);
177 break;
178 }
179
180 did_word = anc.words[0];
181 second_word = anc.words[1];
182 dc_word = anc.words[2];
183 did = anc.did;
184 sdid_or_dbn = anc.sdid_or_dbn;
185 type1 = (did & 0x80U) != 0;
186 data_count = anc.data_count;
187
188 packet_ti = proto_tree_add_none_format(root, hf_st2038_anc_packet,
189 tvb, start_bit / 8,
190 (70U + data_count * 10U + 7U) / 8U,
191 "ANC Packet %u: line %u, DID 0x%02x, %s 0x%02x",
192 packet_index + 1, line_number, did,
193 type1 ? "DBN" : "SDID", sdid_or_dbn);
194 st291_append_packet_description(packet_ti, did, sdid_or_dbn);
195 packet_tree = proto_item_add_subtree(packet_ti, ett_st2038_anc_packet);
196
197 proto_tree_add_bits_item(packet_tree, hf_st2038_reserved, tvb,
198 start_bit, 6, ENC_BIG_ENDIAN0x00000000);
199 proto_tree_add_bits_item(packet_tree, hf_st2038_c_not_y, tvb,
200 start_bit + 6, 1, ENC_BIG_ENDIAN0x00000000);
201 proto_tree_add_bits_item(packet_tree, hf_st2038_line_number, tvb,
202 start_bit + 7, 11, ENC_BIG_ENDIAN0x00000000);
203 proto_tree_add_bits_item(packet_tree, hf_st2038_horizontal_offset, tvb,
204 start_bit + 18, 12, ENC_BIG_ENDIAN0x00000000);
205
206 st291_tree_add_did(packet_tree, tvb, (start_bit + 30) / 8, 2, did);
207 if (type1)
208 st291_tree_add_dbn(packet_tree, tvb, (start_bit + 40) / 8, 2, sdid_or_dbn);
209 else
210 st291_tree_add_sdid(packet_tree, tvb, (start_bit + 40) / 8, 2, did, sdid_or_dbn);
211
212 proto_tree_add_bits_item(packet_tree, hf_st2038_data_count, tvb,
213 start_bit + 50, 10, ENC_BIG_ENDIAN0x00000000);
214
215 if (reserved != 0)
216 expert_add_info_format(pinfo, packet_ti, &ei_st2038_reserved,
217 "Reserved six-bit field is 0x%x, expected 0", reserved);
218
219 if (!anc.did_parity_ok)
220 expert_add_info_format(pinfo, packet_ti, &ei_st2038_bad_parity,
221 "Invalid ST 291 DID parity/inverse bits (raw word 0x%03x); decoding bits 7..0",
222 did_word);
223 if (!anc.second_word_parity_ok)
224 expert_add_info_format(pinfo, packet_ti, &ei_st2038_bad_parity,
225 "Invalid ST 291 %s parity/inverse bits (raw word 0x%03x); decoding bits 7..0",
226 type1 ? "DBN" : "SDID", second_word);
227 if (!anc.data_count_parity_ok)
228 expert_add_info_format(pinfo, packet_ti, &ei_st2038_bad_parity,
229 "Invalid ST 291 data-count parity/inverse bits (raw word 0x%03x); decoding bits 7..0",
230 dc_word);
231
232 if (first_line < 0)
233 first_line = (int)line_number;
234 else if ((unsigned)first_line != line_number)
235 expert_add_info_format(pinfo, packet_ti, &ei_st2038_multiple_lines,
236 "ST 2038 requires one raster line per PES packet; first ANC packet used line %d",
237 first_line);
238
239 /*
240 * Mirror the ST 2110-40 presentation: show the octets touched by
241 * the packed 10-bit UDW bitstream as one item, rather than adding
242 * one protocol-tree row for every individual UDW. The generated
243 * byte-oriented UDW Array below remains the public subdissector
244 * payload (bits b7..b0 from each 10-bit word).
245 */
246 udw_start_bit = start_bit + 60U;
247 if (data_count > 0) {
248 udw_start_byte = udw_start_bit / 8U;
249 udw_octet_length = ((udw_start_bit & 7U) + data_count * 10U + 7U) / 8U;
250 ti = proto_tree_add_item(packet_tree, hf_st2038_udw_bytes, tvb,
251 udw_start_byte, udw_octet_length, ENC_NA0x00000000);
252 proto_item_set_hidden(ti);
253 }
254
255 bit_offset = start_bit + 30U + (3U + data_count) * 10U;
256 cs_ti = proto_tree_add_bits_item(packet_tree, hf_st2038_checksum, tvb,
257 bit_offset, 10, ENC_BIG_ENDIAN0x00000000);
258 bit_offset += 10;
259
260 cs_calc = anc.checksum_calculated;
261
262 ti = proto_tree_add_uint(packet_tree,
263 hf_st2038_checksum_calculated, tvb, 0, 0, cs_calc);
264 proto_item_set_generated(ti);
265
266 if (!anc.checksum_ok)
267 expert_add_info(pinfo, cs_ti, &ei_st2038_bad_checksum);
268
269 /* Table 2 requires '1' bits until the next byte boundary. */
270 align_bits = (8U - (bit_offset & 7U)) & 7U;
271 if (align_bits != 0) {
272 uint8_t alignment;
273
274 if (total_bits - bit_offset < align_bits) {
275 expert_add_info(pinfo, packet_ti, &ei_st2038_truncated);
276 break;
277 }
278
279 alignment = tvb_get_bits8(tvb, bit_offset, align_bits);
280 ti = proto_tree_add_bits_item(packet_tree,
281 hf_st2038_alignment_bits, tvb, bit_offset, align_bits,
282 ENC_BIG_ENDIAN0x00000000);
283 if (alignment != ((1U << align_bits) - 1U))
284 expert_add_info(pinfo, ti, &ei_st2038_bad_alignment);
285 bit_offset += align_bits;
286 }
287
288 if (data_count > 0) {
289 udw_ti = proto_tree_add_item(packet_tree, hf_st2038_udw_array,
290 anc.packed_udw_tvb, 0,
291 tvb_captured_length(anc.packed_udw_tvb),
292 ENC_NA0x00000000);
293 } else {
294 udw_ti = proto_tree_add_item(packet_tree, hf_st2038_udw_array,
295 tvb, bit_offset / 8U, 0, ENC_NA0x00000000);
296 proto_item_set_generated(udw_ti);
297 }
298 udw_tree = proto_item_add_subtree(udw_ti, ett_st2038_udw);
299
300 {
301 st291_vanc_dissector_data_t st291_data = {
302 .top_tree = tree,
303 .payload_index = packet_index,
304 };
305 st291_vanc_dissect_packet(&anc, pinfo, udw_tree, udw_ti,
306 &st291_data);
307 }
308
309 packet_index++;
310 }
311
312 /*
313 * Generated convenience field: number of complete ANC records parsed
314 * from this ST 2038 PES payload. This is not an on-wire ST 2038 field.
315 * Keeping the field present even when the value is zero makes filters
316 * such as "st2038.anc_count == 0" useful.
317 */
318 ti = proto_tree_add_uint(root, hf_st2038_anc_count, tvb, 0, 0, packet_index);
319 proto_item_set_generated(ti);
320
321 col_add_fstr(pinfo->cinfo, COL_INFO, "SMPTE ST 2038 ANC Data, %u ANC packet%s",
322 packet_index, packet_index == 1 ? "" : "s");
323
324 return tvb_captured_length(tvb);
325}
326
327void
328proto_register_st2038(void)
329{
330 static hf_register_info hf[] = {
331 { &hf_st2038_anc_packet,
332 { "ANC Packet", "st2038.anc_packet", FT_NONE, BASE_NONE,
333 NULL((void*)0), 0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
334 { &hf_st2038_anc_count,
335 { "ANC Packet Count", "st2038.anc_count", FT_UINT32, BASE_DEC,
336 NULL((void*)0), 0, "Number of complete ANC packets in this PES payload", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
337 { &hf_st2038_reserved,
338 { "Reserved", "st2038.reserved", FT_UINT8, BASE_HEX,
339 NULL((void*)0), 0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
340 { &hf_st2038_c_not_y,
341 { "C/Y Channel", "st2038.c_not_y", FT_BOOLEAN, BASE_NONE,
342 TFS(&tfs_c_not_y)((0 ? (const struct true_false_string*)0 : ((&tfs_c_not_y
)))), 0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
343 { &hf_st2038_line_number,
344 { "Line Number", "st2038.line_number", FT_UINT16, BASE_DEC,
345 NULL((void*)0), 0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
346 { &hf_st2038_horizontal_offset,
347 { "Horizontal Offset", "st2038.horizontal_offset", FT_UINT16, BASE_DEC,
348 NULL((void*)0), 0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
349 { &hf_st2038_data_count,
350 { "Data Count Word", "st2038.data_count", FT_UINT16, BASE_HEX,
351 NULL((void*)0), 0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
352 { &hf_st2038_udw_bytes,
353 { "UDW Bytes", "st2038.udw", FT_BYTES, BASE_NONE,
354 NULL((void*)0), 0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
355 { &hf_st2038_udw_array,
356 { "User Data Words", "st2038.udw_array", FT_BYTES, BASE_NONE,
357 NULL((void*)0), 0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
358 { &hf_st2038_checksum,
359 { "Checksum Word", "st2038.checksum", FT_UINT16, BASE_HEX,
360 NULL((void*)0), 0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
361 { &hf_st2038_checksum_calculated,
362 { "Calculated Checksum", "st2038.checksum_calculated", FT_UINT16, BASE_HEX,
363 NULL((void*)0), 0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
364 { &hf_st2038_alignment_bits,
365 { "Alignment / Stuffing Bits", "st2038.alignment_bits", FT_UINT64, BASE_HEX,
366 NULL((void*)0), 0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
367 { &hf_st2038_stuffing_bytes,
368 { "Stuffing Bytes", "st2038.stuffing_bytes", FT_BYTES, BASE_NONE,
369 NULL((void*)0), 0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
370 };
371
372 static int *ett[] = {
373 &ett_st2038,
374 &ett_st2038_anc_packet,
375 &ett_st2038_udw,
376 };
377
378 static ei_register_info ei[] = {
379 { &ei_st2038_reserved,
380 { "st2038.reserved.nonzero", PI_PROTOCOL0x09000000, PI_WARN0x00600000,
381 "Reserved bits are non-zero", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}} } },
382 { &ei_st2038_bad_parity,
383 { "st2038.st291_parity_bad", PI_CHECKSUM0x01000000, PI_WARN0x00600000,
384 "Invalid ST 291 parity/inverse bits", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}} } },
385 { &ei_st2038_bad_checksum,
386 { "st2038.checksum.bad", PI_CHECKSUM0x01000000, PI_WARN0x00600000,
387 "ST 291 checksum does not match", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}} } },
388 { &ei_st2038_bad_alignment,
389 { "st2038.alignment.bad", PI_MALFORMED0x07000000, PI_WARN0x00600000,
390 "ST 2038 alignment bits must be one", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}} } },
391 { &ei_st2038_nonstandard_stuffing,
392 { "st2038.inter_record_stuffing", PI_PROTOCOL0x09000000, PI_WARN0x00600000,
393 "Non-standard inter-record stuffing bits accepted for interoperability",
394 EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}} } },
395 { &ei_st2038_multiple_lines,
396 { "st2038.multiple_lines", PI_PROTOCOL0x09000000, PI_WARN0x00600000,
397 "One ST 2038 PES packet contains ANC data from multiple raster lines",
398 EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}} } },
399 { &ei_st2038_truncated,
400 { "st2038.truncated", PI_MALFORMED0x07000000, PI_WARN0x00600000,
401 "Truncated ST 2038 ANC record", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE
, BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE
, -1, ((void*)0)}} } },
402 };
403
404 expert_module_t *expert;
405
406 proto_st2038 = proto_register_protocol(
407 "SMPTE ST 2038 Ancillary Data in MPEG-2 TS", "ST 2038", "st2038");
408 proto_register_field_array(proto_st2038, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0]));
409 proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0]));
410
411 expert = expert_register_protocol(proto_st2038);
412 expert_register_field_array(expert, ei, array_length(ei)(sizeof (ei) / sizeof (ei)[0]));
413
414 st2038_handle = register_dissector("st2038", dissect_st2038, proto_st2038);
415}
416
417void
418proto_reg_handoff_st2038(void)
419{
420 dissector_add_uint("mpeg-pes.registration", ST2038_REGISTRATION_ID0x56414e43U,
421 st2038_handle);
422}
423
424/*
425 * Editor modelines - https://www.wireshark.org/tools/modelines.html
426 *
427 * Local variables:
428 * c-basic-offset: 4
429 * tab-width: 8
430 * indent-tabs-mode: nil
431 * End:
432 *
433 * vi: set shiftwidth=4 tabstop=8 expandtab:
434 * :indentSize=4:tabSize=8:noTabs=true:
435 */