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wireshark/epan/dissectors/packet-ieee1722a.c

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/* packet-ieee1722a.c
* Routines for AVB-TP (Audio Video Bridging - Transport Protocol) dissection
* Copyright 2014, Andreas Leibold <andreas.leibold@harman.com>,
* Patrick Martin <patrick.martin@harman.com>
*
* 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; either 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.
*
* The 1722a Protocol specification can be found here:
* http://grouper.ieee.org/groups/1722/
*
* Dissector based on specification version: 1722a Draft 7
*
* Only 1722a "Audio" and "Clock Reference Stream Audio Timestamps"
* are dissected.
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/expert.h>
void proto_register_1722a(void);
void proto_reg_handoff_1722a(void);
/* 1722a Offsets */
/* 1722a audio */
#define IEEE_1722A_CD_OFFSET 0
#define IEEE_1722A_VERSION_OFFSET 1
#define IEEE_1722A_SEQ_NUM_OFFSET 2
#define IEEE_1722A_TU_FIELD_OFFSET 3
#define IEEE_1722A_STREAM_ID_OFFSET 4
#define IEEE_1722A_TIMESTAMP_OFFSET 12
#define IEEE_1722A_FORMAT_INFO_OFFSET 16
#define IEEE_1722A_NOM_SAMPLE_RATE_OFFSET 17
#define IEEE_1722A_CHANNELS_PER_FRAME_OFFSET 17
#define IEEE_1722A_BIT_DEPTH_OFFSET 19
#define IEEE_1722A_STREAM_DATA_LENGTH_OFFSET 20
#define IEEE_1722A_SPARSE_TIMESTAMP_OFFSET 22
#define IEEE_1722A_EVT_OFFSET 22
#define IEEE_1722A_DATA_OFFSET 24
/* CRF */
#define IEEE_1722A_CRF_TYPE_OFFSET 22
#define IEEE_1722A_CRF_CLOCK_FREQUENCY_OFFSET 24
#define IEEE_1722A_CRF_CLOCK_MULTIPLIER_OFFSET 25
#define IEEE_1722A_CRF_TIMESTAMP_INTERVAL_OFFSET 26
#define IEEE_1722A_CRF_AUDIO_TIMESTAMP_OFFSET 28
/* Bit Field Masks */
/* 1722a audio */
#define IEEE_1722A_SUBTYPE_MASK 0x7f
#define IEEE_1722A_MR_MASK 0x08
#define IEEE_1722A_TV_MASK 0x01
#define IEEE_1722A_TU_MASK 0x01
#define IEEE_1722A_NOM_SAMPLE_RATE_MASK 0xf0
#define IEEE_1722A_CHANNEL_PER_FRAME_MASK 0x03ff
#define IEEE_1722A_SP_MASK 0x10
#define IEEE_1722A_EVT_MASK 0x0f
#define IEEE_1722A_CRF_AUDIO_SAMPLE_TIMESTAMP 1
#define IEEE_1722A_CRF_TIMESTAMP_SIZE 8 /* size of the CRF timestamp in bytes */
#define IEEE_1722A_SUBTYPE_AVTP_AUDIO 0x02
#define IEEE_1722A_SUBTYPE_CRF 0x05
#define FORMAT_INFO_USER_SPECIFIED 0
#define FORMAT_INFO_32FLOAT 1
#define FORMAT_INFO_32INTEGER 2
#define FORMAT_INFO_24INTEGER 3
#define FORMAT_INFO_16INTEGER 4
static const value_string format_info_vals [] = {
{FORMAT_INFO_USER_SPECIFIED, "User specified"},
{FORMAT_INFO_32FLOAT, "[32bit floating]"},
{FORMAT_INFO_32INTEGER, "[32bit integer]"},
{FORMAT_INFO_24INTEGER, "[24bit integer]"},
{FORMAT_INFO_16INTEGER, "[16bit integer]"},
{0, NULL}
};
#define SAMPLE_RATE_USER_SPECIFIED 0
#define SAMPLE_RATE_8K 1
#define SAMPLE_RATE_16K 2
#define SAMPLE_RATE_32K 3
#define SAMPLE_RATE_44K1 4
#define SAMPLE_RATE_48K 5
#define SAMPLE_RATE_88K2 6
#define SAMPLE_RATE_96K 7
#define SAMPLE_RATE_176K4 8
#define SAMPLE_RATE_192K 9
#define SAMPLE_RATE_16RPM 10
#define SAMPLE_RATE_33RPM3 11
#define SAMPLE_RATE_33RPM3_REV 12
#define SAMPLE_RATE_45RPM 13
#define SAMPLE_RATE_78RPM 14
#define SAMPLE_RATE_RESERVED 15
static const value_string sample_rate_type_vals [] = {
{SAMPLE_RATE_USER_SPECIFIED, "User specified"},
{SAMPLE_RATE_8K, "[8kHz]"},
{SAMPLE_RATE_16K, "[16kHz]"},
{SAMPLE_RATE_32K, "[32kHz]"},
{SAMPLE_RATE_44K1, "[44.1kHz]"},
{SAMPLE_RATE_48K, "[48kHz]"},
{SAMPLE_RATE_88K2, "[88.2kHz]"},
{SAMPLE_RATE_96K, "[96kHz]"},
{SAMPLE_RATE_176K4, "[176.4kHz]"},
{SAMPLE_RATE_192K, "[192kHz]"},
{SAMPLE_RATE_16RPM, "[16 RPM]"},
{SAMPLE_RATE_33RPM3, "[33 1/3 RPM]"},
{SAMPLE_RATE_33RPM3_REV, "[33 1/3 RPM In Reverse]"},
{SAMPLE_RATE_45RPM, "[45RPM]"},
{SAMPLE_RATE_78RPM, "[78RPM]"},
{SAMPLE_RATE_RESERVED, "Reserved"},
{0, NULL}
};
#define CLOCK_FREQUENCY_OTHER 0
#define CLOCK_FREQUENCY_8K 1
#define CLOCK_FREQUENCY_16K 2
#define CLOCK_FREQUENCY_32K 3
#define CLOCK_FREQUENCY_44K1 4
#define CLOCK_FREQUENCY_88K2 5
#define CLOCK_FREQUENCY_176K4 6
#define CLOCK_FREQUENCY_48K 7
#define CLOCK_FREQUENCY_96K 8
#define CLOCK_FREQUENCY_192K 9
static const value_string clock_frequency_type_vals [] = {
{CLOCK_FREQUENCY_OTHER, "Other Nominal Frequency"},
{CLOCK_FREQUENCY_8K, "[8kHz]"},
{CLOCK_FREQUENCY_16K, "[16kHz]"},
{CLOCK_FREQUENCY_32K, "[32kHz]"},
{CLOCK_FREQUENCY_44K1, "[44.1kHz]"},
{CLOCK_FREQUENCY_88K2, "[88.2kHz]"},
{CLOCK_FREQUENCY_176K4, "[176.4kHz]"},
{CLOCK_FREQUENCY_48K, "[48kHz]"},
{CLOCK_FREQUENCY_96K, "[96kHz]"},
{CLOCK_FREQUENCY_192K, "[192kHz]"},
{0, NULL}
};
#define CLOCK_MULTIPLIER_0 0
#define CLOCK_MULTIPLIER_1 1
#define CLOCK_MULTIPLIER_2 2
#define CLOCK_MULTIPLIER_3 3
#define CLOCK_MULTIPLIER_4 4
static const value_string clock_multiplier_type_vals [] = {
{CLOCK_MULTIPLIER_0, "[1.0]"},
{CLOCK_MULTIPLIER_1, "[1/1.001]"},
{CLOCK_MULTIPLIER_2, "[1.001]"},
{CLOCK_MULTIPLIER_3, "[24/25]"},
{CLOCK_MULTIPLIER_4, "[25/24]"},
{0, NULL}
};
#define CRF_TYPE_OTHER 0
#define CRF_TYPE_AUDIO 1
#define CRF_TYPE_VIDEO_FRAME_SYNC 2
#define CRF_TYPE_VIDEO_LINE_SYNC 3
#define CRF_TYPE_EXPERIMENTAL 0xffff
static const value_string clock_reference_format_type_vals [] = {
{CRF_TYPE_OTHER, "Other"},
{CRF_TYPE_AUDIO, "Audio Sample Timestamp"},
{CRF_TYPE_VIDEO_FRAME_SYNC, "Video Frame Sync Timestamp"},
{CRF_TYPE_VIDEO_LINE_SYNC, "Video Line Sync Timestamp"},
{CRF_TYPE_EXPERIMENTAL, "Experimental"},
{0, NULL}
};
/**********************************************************/
/* Initialize the protocol and registered fields */
/**********************************************************/
/* 1722a audio */
static int proto_1722a = -1;
static int hf_1722a_mrfield = -1;
static int hf_1722a_tvfield = -1;
static int hf_1722a_seqnum = -1;
static int hf_1722a_tufield = -1;
static int hf_1722a_stream_id = -1;
static int hf_1722a_avbtp_timestamp = -1;
static int hf_1722a_format_info = -1;
static int hf_1722a_nominal_sample_rate = -1;
static int hf_1722a_bit_depth = -1;
static int hf_1722a_stream_data_length = -1;
static int hf_1722a_sparse_timestamp = -1;
static int hf_1722a_evtfield = -1;
static int hf_1722a_channels_per_frame = -1;
static int hf_1722a_data = -1;
static int hf_1722a_sample = -1;
/* CRF */
static int hf_1722a_crf_type = -1;
static int hf_1722a_clock_frequency = -1;
static int hf_1722a_clock_multiplier = -1;
static int hf_1722a_timestamp_interval = -1;
static int hf_1722a_crf_timestamp = -1;
static int hf_1722a_crf_timestamp_data = -1;
/* Initialize the subtree pointers */
static int ett_1722a = -1;
static int ett_1722a_audio = -1;
static int ett_1722a_sample = -1;
static int ett_1722a_crf_timestamp = -1;
static expert_field ei_sample_width = EI_INIT;
static expert_field ei_channels_per_frame = EI_INIT;
static expert_field ei_unknown_parameter = EI_INIT;
static expert_field ei_format_info = EI_INIT;
static expert_field ei_clock_reference_type = EI_INIT;
static int dissect_1722a (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_item *ti = NULL;
proto_tree *ieee1722a_tree = NULL;
proto_tree *audio_tree = NULL;
proto_tree *sample_tree = NULL;
proto_tree *timestamp_tree = NULL;
gint offset = 0;
guint16 datalen = 0;
guint16 channels_per_frame = 0;
guint8 subtype = 0;
gint sample_width = 0;
int i, j;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "IEEE1722a");
col_set_str(pinfo->cinfo, COL_INFO, "AVB Transportation Protocol");
if (tree)
{
ti = proto_tree_add_item(tree, proto_1722a, tvb, 0, -1, ENC_NA);
ieee1722a_tree = proto_item_add_subtree(ti, ett_1722a);
}
/* Version field ends the common AVTPDU. Now parse the specific packet type */
subtype = tvb_get_guint8(tvb, IEEE_1722A_CD_OFFSET);
subtype &= IEEE_1722A_SUBTYPE_MASK;
switch (subtype)
{
case IEEE_1722A_SUBTYPE_AVTP_AUDIO:
if (tree)
{
proto_tree_add_item(ieee1722a_tree, hf_1722a_mrfield, tvb, IEEE_1722A_VERSION_OFFSET, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ieee1722a_tree, hf_1722a_tvfield, tvb, IEEE_1722A_VERSION_OFFSET, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ieee1722a_tree, hf_1722a_seqnum, tvb, IEEE_1722A_SEQ_NUM_OFFSET, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ieee1722a_tree, hf_1722a_tufield, tvb, IEEE_1722A_TU_FIELD_OFFSET, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ieee1722a_tree, hf_1722a_stream_id, tvb, IEEE_1722A_STREAM_ID_OFFSET, 8, ENC_BIG_ENDIAN);
proto_tree_add_item(ieee1722a_tree, hf_1722a_avbtp_timestamp, tvb, IEEE_1722A_TIMESTAMP_OFFSET, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(ieee1722a_tree, hf_1722a_format_info, tvb, IEEE_1722A_FORMAT_INFO_OFFSET, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ieee1722a_tree, hf_1722a_nominal_sample_rate, tvb, IEEE_1722A_NOM_SAMPLE_RATE_OFFSET, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ieee1722a_tree, hf_1722a_channels_per_frame, tvb, IEEE_1722A_CHANNELS_PER_FRAME_OFFSET, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(ieee1722a_tree, hf_1722a_bit_depth, tvb, IEEE_1722A_BIT_DEPTH_OFFSET, 1, ENC_BIG_ENDIAN);
ti = proto_tree_add_item(ieee1722a_tree, hf_1722a_stream_data_length, tvb, IEEE_1722A_STREAM_DATA_LENGTH_OFFSET, 2, ENC_BIG_ENDIAN);
proto_item_append_text(ti, " bytes");
proto_tree_add_item(ieee1722a_tree, hf_1722a_sparse_timestamp, tvb, IEEE_1722A_SPARSE_TIMESTAMP_OFFSET, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ieee1722a_tree, hf_1722a_evtfield, tvb, IEEE_1722A_EVT_OFFSET, 1, ENC_BIG_ENDIAN);
}
/* Make the Audio sample tree. */
datalen = tvb_get_ntohs(tvb, IEEE_1722A_STREAM_DATA_LENGTH_OFFSET); /* Length of audio data in bytes */
ti = proto_tree_add_item(ieee1722a_tree, hf_1722a_data, tvb, IEEE_1722A_DATA_OFFSET, datalen, ENC_NA);
audio_tree = proto_item_add_subtree(ti, ett_1722a_audio);
/* Need to get the offset of where the audio data starts */
offset = IEEE_1722A_DATA_OFFSET;
channels_per_frame = tvb_get_ntohs(tvb, IEEE_1722A_CHANNELS_PER_FRAME_OFFSET);
channels_per_frame &= IEEE_1722A_CHANNEL_PER_FRAME_MASK;
switch (tvb_get_guint8(tvb, IEEE_1722A_FORMAT_INFO_OFFSET))
{
case 0:
break;
case 1:
sample_width = 32;
break;
case 2:
sample_width = 32;
break;
case 3:
sample_width = 24;
break;
case 4:
sample_width = 16;
break;
default:
expert_add_info(pinfo, ti, &ei_format_info);
break;
}
if (sample_width == 0)
{
expert_add_info(pinfo, ti, &ei_sample_width);
}
else
{
if (channels_per_frame == 0)
{
expert_add_info(pinfo, ti, &ei_channels_per_frame);
}
else
{
if (tree)
{
/* Loop through all samples and add them to the audio tree. */
for (j = 0; j < ((datalen * 8) / (channels_per_frame * sample_width)); j++)
{
sample_tree = proto_tree_add_subtree_format(audio_tree, tvb, offset, 1,
ett_1722a_sample, &ti, "Sample Chunk %d", j);
for (i = 0; i < channels_per_frame; i++)
{
ti = proto_tree_add_item(sample_tree, hf_1722a_sample, tvb, offset, sample_width / 8, ENC_NA);
proto_item_prepend_text(ti, "Channel: %d ", i);
offset += (sample_width / 8);
}
}
}
}
}
break;
case IEEE_1722A_SUBTYPE_CRF:
proto_tree_add_item(ieee1722a_tree, hf_1722a_mrfield, tvb, IEEE_1722A_VERSION_OFFSET, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ieee1722a_tree, hf_1722a_tvfield, tvb, IEEE_1722A_VERSION_OFFSET, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ieee1722a_tree, hf_1722a_seqnum, tvb, IEEE_1722A_SEQ_NUM_OFFSET, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ieee1722a_tree, hf_1722a_tufield, tvb, IEEE_1722A_TU_FIELD_OFFSET, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ieee1722a_tree, hf_1722a_stream_id, tvb, IEEE_1722A_STREAM_ID_OFFSET, 8, ENC_BIG_ENDIAN);
ti = proto_tree_add_item(ieee1722a_tree, hf_1722a_stream_data_length, tvb, IEEE_1722A_STREAM_DATA_LENGTH_OFFSET, 2, ENC_BIG_ENDIAN);
proto_item_append_text(ti, " bytes");
proto_tree_add_item(ieee1722a_tree, hf_1722a_crf_type, tvb, IEEE_1722A_CRF_TYPE_OFFSET, 2, ENC_BIG_ENDIAN);
switch (tvb_get_ntohs(tvb, IEEE_1722A_CRF_TYPE_OFFSET))
{
/* Audio Timestamp Case */
case IEEE_1722A_CRF_AUDIO_SAMPLE_TIMESTAMP:
if (tree)
{
proto_tree_add_item(ieee1722a_tree, hf_1722a_clock_frequency, tvb, IEEE_1722A_CRF_CLOCK_FREQUENCY_OFFSET, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ieee1722a_tree, hf_1722a_clock_multiplier, tvb, IEEE_1722A_CRF_CLOCK_MULTIPLIER_OFFSET, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ieee1722a_tree, hf_1722a_timestamp_interval, tvb, IEEE_1722A_CRF_TIMESTAMP_INTERVAL_OFFSET, 2, ENC_BIG_ENDIAN);
/* Make the Timestamp tree. */
datalen = tvb_get_ntohs(tvb, IEEE_1722A_STREAM_DATA_LENGTH_OFFSET);
datalen = datalen - 6; /* remove type field and type header */
ti = proto_tree_add_item(ieee1722a_tree, hf_1722a_crf_timestamp, tvb, IEEE_1722A_CRF_AUDIO_TIMESTAMP_OFFSET, datalen, ENC_NA);
timestamp_tree = proto_item_add_subtree(ti, ett_1722a_crf_timestamp);
offset = IEEE_1722A_CRF_AUDIO_TIMESTAMP_OFFSET;
/* Loop through all timestamps and add them to the timestamp tree. */
for (j = 0; j < (datalen / IEEE_1722A_CRF_TIMESTAMP_SIZE); j++)
{
proto_tree_add_item(timestamp_tree, hf_1722a_crf_timestamp_data, tvb, offset, IEEE_1722A_CRF_TIMESTAMP_SIZE, ENC_BIG_ENDIAN);
offset += IEEE_1722A_CRF_TIMESTAMP_SIZE;
}
}
break;
default:
expert_add_info(pinfo, ti, &ei_clock_reference_type);
break;
}
break;
default:
/* This dissector only registers for subtype 0x02 (AVTP Audio Format) and 0x05 (Clock Reference Format)
which will be handled above. So we won`t enter the default path. */
DISSECTOR_ASSERT_NOT_REACHED();
break;
}
return tvb_captured_length(tvb);
}
/* Register the protocol with Wireshark */
void proto_register_1722a (void)
{
expert_module_t *expert_1722a;
static hf_register_info hf[] =
{
{ &hf_1722a_mrfield,
{ "AVBTP Media Clock Restart", "ieee1722a.mrfield",
FT_BOOLEAN, 8, NULL, IEEE_1722A_MR_MASK, NULL, HFILL }
},
{ &hf_1722a_tvfield,
{ "Source Timestamp Valid", "ieee1722a.tvfield",
FT_BOOLEAN, 8, NULL, IEEE_1722A_TV_MASK, NULL, HFILL }
},
{ &hf_1722a_seqnum,
{ "Sequence Number", "ieee1722a.seqnum",
FT_UINT8, BASE_DEC, NULL, 0x00, NULL, HFILL }
},
{ &hf_1722a_tufield,
{ "AVBTP Timestamp Uncertain", "ieee1722a.tufield",
FT_BOOLEAN, 8, NULL, IEEE_1722A_TU_MASK, NULL, HFILL }
},
{ &hf_1722a_stream_id,
{ "Stream ID", "ieee1722a.stream_id",
FT_UINT64, BASE_HEX, NULL, 0x00, NULL, HFILL }
},
{ &hf_1722a_avbtp_timestamp,
{ "AVBTP Timestamp", "ieee1722a.avbtp_timestamp",
FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL }
},
{ &hf_1722a_format_info,
{ "Format Info", "ieee1722a.format_info",
FT_UINT8, BASE_HEX, VALS(format_info_vals), 0x00, NULL, HFILL }
},
{ &hf_1722a_nominal_sample_rate,
{ "Nominal Sample Rate", "ieee1722a.nominal_sample_rate",
FT_UINT8, BASE_HEX, VALS(sample_rate_type_vals), IEEE_1722A_NOM_SAMPLE_RATE_MASK, NULL, HFILL }
},
{ &hf_1722a_bit_depth,
{ "Bit Depth", "ieee1722a.bit_depth",
FT_UINT8, BASE_HEX, NULL, 0x00, NULL, HFILL }
},
{ &hf_1722a_stream_data_length,
{ "Stream Data Length", "ieee1722a.stream_data_len",
FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL }
},
{ &hf_1722a_sparse_timestamp,
{ "Sparse Timestamp Mode", "ieee1722a.sparse_timestamp",
FT_BOOLEAN, 8, NULL, IEEE_1722A_SP_MASK, NULL, HFILL }
},
{ &hf_1722a_evtfield,
{ "EVT", "ieee1722a.evtfield",
FT_UINT8, BASE_HEX, NULL, IEEE_1722A_EVT_MASK, NULL, HFILL }
},
{ &hf_1722a_channels_per_frame,
{ "Channels per Frame", "ieee1722a.channels_per_frame",
FT_UINT16, BASE_DEC, NULL, IEEE_1722A_CHANNEL_PER_FRAME_MASK, NULL, HFILL }
},
{ &hf_1722a_data,
{ "Audio Data", "ieee1722a.data",
FT_BYTES, BASE_NONE, NULL, 0x00, NULL, HFILL }
},
{ &hf_1722a_sample,
{ "Sample Data", "ieee1722a.data.sample.sampledata",
FT_BYTES, BASE_NONE, NULL, 0x00, NULL, HFILL }
},
{ &hf_1722a_crf_type,
{ "Type", "ieee1722a.type",
FT_UINT16, BASE_HEX, VALS(clock_reference_format_type_vals), 0x00, NULL, HFILL }
},
{ &hf_1722a_clock_frequency,
{ "Clock Frequency", "ieee1722a.clock_frequency",
FT_UINT8, BASE_HEX, VALS(clock_frequency_type_vals), 0x00, NULL, HFILL }
},
{ &hf_1722a_clock_multiplier,
{ "Clock Multiplier", "ieee1722a.clock_multiplier",
FT_UINT8, BASE_HEX, VALS(clock_multiplier_type_vals), 0x00, NULL, HFILL }
},
{ &hf_1722a_timestamp_interval,
{ "Timestamp Interval", "ieee1722a.timestamp_interval",
FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL }
},
{ &hf_1722a_crf_timestamp,
{ "Timestamps", "ieee1722a.crf_timestamps",
FT_BYTES, BASE_NONE, NULL, 0x00, NULL, HFILL }
},
{ &hf_1722a_crf_timestamp_data,
{ "Timestamp Data", "ieee1722a.crf_timestamp_data",
FT_UINT64, BASE_HEX, NULL, 0x00, NULL, HFILL }
}
};
static ei_register_info ei[] = {
{ &ei_sample_width, { "1722a.expert.sample_width_zero", PI_PROTOCOL, PI_WARN, "Wrong value for Sample Width", EXPFILL }},
{ &ei_channels_per_frame, { "1722a.expert.channels_per_frame_zero", PI_PROTOCOL, PI_WARN, "Wrong value for parameter Channels per Frame", EXPFILL }},
{ &ei_unknown_parameter, { "1722a.expert.unknown_parameter", PI_PROTOCOL, PI_WARN, "Unknown parameter", EXPFILL }},
{ &ei_format_info, { "1722a.expert.format_info", PI_PROTOCOL, PI_WARN, "Format Info Value Reserved", EXPFILL }},
{ &ei_clock_reference_type, { "1722a.expert.clock_reference_format_type", PI_PROTOCOL, PI_WARN, "The CRF type is not supported", EXPFILL }}
};
static gint *ett[] =
{
&ett_1722a,
&ett_1722a_audio,
&ett_1722a_sample,
&ett_1722a_crf_timestamp
};
/* Register the protocol name and description */
proto_1722a = proto_register_protocol(
"IEEE 1722a Protocol", /* name */
"1722A", /* short name */
"1722a" /* abbrev */
);
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_1722a, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_1722a = expert_register_protocol(proto_1722a);
expert_register_field_array(expert_1722a, ei, array_length(ei));
}
void proto_reg_handoff_1722a(void)
{
dissector_handle_t avb1722a_handle;
avb1722a_handle = create_dissector_handle(dissect_1722a, proto_1722a);
dissector_add_uint("ieee1722.subtype", IEEE_1722A_SUBTYPE_AVTP_AUDIO, avb1722a_handle);
dissector_add_uint("ieee1722.subtype", IEEE_1722A_SUBTYPE_CRF, avb1722a_handle);
}
/*
* Editor modelines - http://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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