![Martin Kaiser](/assets/img/avatar_default.png)
Change-Id: I529a601ce83c446247cee1e87386622462f24f56 Reviewed-on: https://code.wireshark.org/review/4896 Reviewed-by: Martin Kaiser <wireshark@kaiser.cx> Tested-by: Martin Kaiser <wireshark@kaiser.cx>
666 lines
23 KiB
C
666 lines
23 KiB
C
/* packet-usb-audio.c
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*
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* usb audio dissector
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* Tomasz Mon 2012
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/* the parsing of audio-specific descriptors is based on
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USB Device Class Definition for Audio Devices, Release 2.0 and
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USB Audio Device Class Specification for Basic Audio Devices, Release 1.0 */
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#include "config.h"
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/expert.h>
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#include <epan/reassemble.h>
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#include "packet-usb.h"
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/* XXX - we use the same macro for mpeg sections,
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can we put this in a common include file? */
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#define USB_AUDIO_BCD44_TO_DEC(x) ((((x)&0xf0) >> 4) * 10 + ((x)&0x0f))
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void proto_register_usb_audio(void);
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void proto_reg_handoff_usb_audio(void);
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/* protocols and header fields */
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static int proto_usb_audio = -1;
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static int hf_midi_cable_number = -1;
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static int hf_midi_code_index = -1;
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static int hf_midi_event = -1;
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static int hf_ac_if_desc_subtype = -1;
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static int hf_ac_if_hdr_ver = -1;
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static int hf_ac_if_hdr_total_len = -1;
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static int hf_ac_if_hdr_bInCollection = -1;
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static int hf_ac_if_hdr_if_num = -1;
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static int hf_as_if_desc_subtype = -1;
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static int hf_as_if_gen_term_id = -1;
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static int hf_as_if_gen_delay = -1;
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static int hf_as_if_gen_format = -1;
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static int hf_as_ep_desc_subtype = -1;
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static reassembly_table midi_data_reassembly_table;
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static gint ett_usb_audio = -1;
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static gint ett_usb_audio_desc = -1;
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static dissector_handle_t sysex_handle;
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#define AUDIO_IF_SUBCLASS_UNDEFINED 0x00
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#define AUDIO_IF_SUBCLASS_AUDIOCONTROL 0x01
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#define AUDIO_IF_SUBCLASS_AUDIOSTREAMING 0x02
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#define AUDIO_IF_SUBCLASS_MIDISTREAMING 0x03
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#if 0
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static const value_string usb_audio_subclass_vals[] = {
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{AUDIO_IF_SUBCLASS_UNDEFINED, "SUBCLASS_UNDEFINED"},
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{AUDIO_IF_SUBCLASS_AUDIOCONTROL, "AUDIOCONSTROL"},
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{AUDIO_IF_SUBCLASS_AUDIOSTREAMING, "AUDIOSTREAMING"},
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{AUDIO_IF_SUBCLASS_MIDISTREAMING, "MIDISTREAMING"},
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{0, NULL}
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};
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#endif
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static const value_string code_index_vals[] = {
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{ 0x0, "Miscellaneous (Reserved)" },
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{ 0x1, "Cable events (Reserved)" },
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{ 0x2, "Two-byte System Common message" },
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{ 0x3, "Three-byte System Common message" },
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{ 0x4, "SysEx starts or continues" },
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{ 0x5, "SysEx ends with following single byte/Single-byte System Common Message" },
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{ 0x6, "SysEx ends with following two bytes" },
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{ 0x7, "SysEx ends with following three bytes" },
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{ 0x8, "Note-off" },
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{ 0x9, "Note-on" },
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{ 0xA, "Poly-KeyPress" },
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{ 0xB, "Control Change" },
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{ 0xC, "Program Change" },
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{ 0xD, "Channel Pressure" },
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{ 0xE, "PitchBend Change" },
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{ 0xF, "Single Byte" },
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{ 0, NULL }
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};
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/* USB audio specification, section A.8 */
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#define CS_INTERFACE 0x24
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#define CS_ENDPOINT 0x25
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static const value_string aud_descriptor_type_vals[] = {
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{CS_INTERFACE, "audio class interface"},
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{CS_ENDPOINT, "audio class endpoint"},
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{0,NULL}
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};
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static value_string_ext aud_descriptor_type_vals_ext =
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VALUE_STRING_EXT_INIT(aud_descriptor_type_vals);
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#define AC_SUBTYPE_HEADER 0x01
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#define AC_SUBTYPE_INPUT_TERMINAL 0x02
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#define AC_SUBTYPE_OUTPUT_TERMINAL 0x03
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#define AC_SUBTYPE_MIXER_UNIT 0x04
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#define AC_SUBTYPE_SELECTOR_UNIT 0x05
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#define AC_SUBTYPE_FEATURE_UNIT 0x06
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static const value_string ac_subtype_vals[] = {
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{AC_SUBTYPE_HEADER, "Header Descriptor"},
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{AC_SUBTYPE_INPUT_TERMINAL, "Input terminal descriptor"},
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{AC_SUBTYPE_OUTPUT_TERMINAL, "Output terminal descriptor"},
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{AC_SUBTYPE_MIXER_UNIT, "Mixer unit descriptor"},
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{AC_SUBTYPE_SELECTOR_UNIT, "Selector unit descriptor"},
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{AC_SUBTYPE_FEATURE_UNIT, "Feature unit descriptor"},
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{0,NULL}
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};
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static value_string_ext ac_subtype_vals_ext =
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VALUE_STRING_EXT_INIT(ac_subtype_vals);
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#define AS_SUBTYPE_GENERAL 0x01
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#define AS_SUBTYPE_FORMAT_TYPE 0x02
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#define AS_SUBTYPE_ENCODER 0x03
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static const value_string as_subtype_vals[] = {
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{AS_SUBTYPE_GENERAL, "General AS Descriptor"},
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{AS_SUBTYPE_FORMAT_TYPE, "Format type descriptor"},
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{AS_SUBTYPE_ENCODER, "Encoder descriptor"},
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{0,NULL}
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};
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static value_string_ext as_subtype_vals_ext =
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VALUE_STRING_EXT_INIT(as_subtype_vals);
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typedef struct _audio_conv_info_t {
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/* the major version of the USB audio class specification,
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taken from the AC header descriptor */
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guint8 ver_major;
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} audio_conv_info_t;
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static int hf_sysex_msg_fragments = -1;
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static int hf_sysex_msg_fragment = -1;
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static int hf_sysex_msg_fragment_overlap = -1;
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static int hf_sysex_msg_fragment_overlap_conflicts = -1;
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static int hf_sysex_msg_fragment_multiple_tails = -1;
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static int hf_sysex_msg_fragment_too_long_fragment = -1;
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static int hf_sysex_msg_fragment_error = -1;
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static int hf_sysex_msg_fragment_count = -1;
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static int hf_sysex_msg_reassembled_in = -1;
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static int hf_sysex_msg_reassembled_length = -1;
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static int hf_sysex_msg_reassembled_data = -1;
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static gint ett_sysex_msg_fragment = -1;
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static gint ett_sysex_msg_fragments = -1;
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static expert_field ei_usb_audio_undecoded = EI_INIT;
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static const fragment_items sysex_msg_frag_items = {
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/* Fragment subtrees */
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&ett_sysex_msg_fragment,
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&ett_sysex_msg_fragments,
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/* Fragment fields */
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&hf_sysex_msg_fragments,
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&hf_sysex_msg_fragment,
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&hf_sysex_msg_fragment_overlap,
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&hf_sysex_msg_fragment_overlap_conflicts,
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&hf_sysex_msg_fragment_multiple_tails,
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&hf_sysex_msg_fragment_too_long_fragment,
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&hf_sysex_msg_fragment_error,
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&hf_sysex_msg_fragment_count,
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/* Reassembled in field */
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&hf_sysex_msg_reassembled_in,
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/* Reassembled length field */
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&hf_sysex_msg_reassembled_length,
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&hf_sysex_msg_reassembled_data,
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/* Tag */
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"Message fragments"
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};
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static inline gboolean
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is_sysex_code(guint8 code)
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{
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return (code == 0x04 || code == 0x05 || code == 0x06 || code == 0x07);
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}
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static gboolean
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is_last_sysex_packet_in_tvb(tvbuff_t *tvb, gint offset)
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{
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gboolean last = TRUE;
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gint length = tvb_length(tvb);
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offset += 4;
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while (offset < length)
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{
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guint8 code = tvb_get_guint8(tvb, offset);
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code &= 0x0F;
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if (is_sysex_code(code))
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{
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last = FALSE;
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break;
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}
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offset += 4;
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}
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return last;
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}
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static void
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dissect_usb_midi_event(tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *usb_audio_tree, proto_tree *parent_tree,
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gint offset)
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{
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guint8 code;
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guint8 cable;
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gboolean save_fragmented;
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proto_tree *tree = NULL;
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col_set_str(pinfo->cinfo, COL_INFO, "USB-MIDI Event Packets");
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code = tvb_get_guint8(tvb, offset);
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cable = (code & 0xF0) >> 4;
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code &= 0x0F;
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if (parent_tree)
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{
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proto_item *ti;
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ti = proto_tree_add_protocol_format(usb_audio_tree, proto_usb_audio, tvb, offset, 4, "USB Midi Event Packet");
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tree = proto_item_add_subtree(ti, ett_usb_audio);
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proto_tree_add_item(tree, hf_midi_cable_number, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(tree, hf_midi_code_index, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(tree, hf_midi_event, tvb, offset+1, 3, ENC_BIG_ENDIAN);
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}
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save_fragmented = pinfo->fragmented;
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/* Reassemble SysEx commands */
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if (is_sysex_code(code))
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{
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tvbuff_t* new_tvb = NULL;
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fragment_head *frag_sysex_msg = NULL;
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pinfo->fragmented = TRUE;
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if (code == 0x04)
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{
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frag_sysex_msg = fragment_add_seq_next(&midi_data_reassembly_table,
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tvb, offset+1,
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pinfo,
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cable, /* ID for fragments belonging together */
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NULL,
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3,
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TRUE);
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}
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else
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{
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frag_sysex_msg = fragment_add_seq_next(&midi_data_reassembly_table,
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tvb, offset+1,
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pinfo,
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cable, /* ID for fragments belonging together */
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NULL,
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(gint)(code - 4),
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FALSE);
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}
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if (is_last_sysex_packet_in_tvb(tvb, offset))
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{
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new_tvb = process_reassembled_data(tvb, offset+1, pinfo,
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"Reassembled Message", frag_sysex_msg, &sysex_msg_frag_items,
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NULL, usb_audio_tree);
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if (code != 0x04) { /* Reassembled */
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col_append_str(pinfo->cinfo, COL_INFO,
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" (SysEx Reassembled)");
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} else { /* Not last packet of reassembled Short Message */
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col_append_str(pinfo->cinfo, COL_INFO,
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" (SysEx fragment)");
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}
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if (new_tvb)
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{
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call_dissector(sysex_handle, new_tvb, pinfo, parent_tree);
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}
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}
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}
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pinfo->fragmented = save_fragmented;
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}
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/* dissect the body of an AC interface header descriptor
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return the number of bytes dissected (which may be smaller than the
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body's length) */
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static gint
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dissect_ac_if_hdr_body(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
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proto_tree *tree, usb_conv_info_t *usb_conv_info)
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{
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gint offset_start;
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guint16 bcdADC;
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guint8 ver_major;
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double ver;
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guint8 if_in_collection, i;
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audio_conv_info_t *audio_conv_info;
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offset_start = offset;
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bcdADC = tvb_get_letohs(tvb, offset);
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ver_major = USB_AUDIO_BCD44_TO_DEC(bcdADC>>8);
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ver = ver_major + USB_AUDIO_BCD44_TO_DEC(bcdADC&0xFF) / 100.0;
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proto_tree_add_double_format_value(tree, hf_ac_if_hdr_ver,
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tvb, offset, 2, ver, "%2.2f", ver);
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audio_conv_info = (audio_conv_info_t *)usb_conv_info->class_data;
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if(!audio_conv_info) {
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audio_conv_info = wmem_new(wmem_file_scope(), audio_conv_info_t);
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usb_conv_info->class_data = audio_conv_info;
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/* XXX - set reasonable default values for all components
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that are not filled in by this function */
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}
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audio_conv_info->ver_major = ver_major;
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offset += 2;
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/* version 1 refers to the Basic Audio Device specification,
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version 2 is the Audio Device class specification, see above */
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if (ver_major==1) {
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proto_tree_add_item(tree, hf_ac_if_hdr_total_len,
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tvb, offset, 2, ENC_LITTLE_ENDIAN);
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offset += 2;
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if_in_collection = tvb_get_guint8(tvb, offset);
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proto_tree_add_item(tree, hf_ac_if_hdr_bInCollection,
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tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset++;
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for (i=0; i<if_in_collection; i++) {
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proto_tree_add_item(tree, hf_ac_if_hdr_if_num,
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tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset++;
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}
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}
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return offset-offset_start;
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}
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static gint
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dissect_as_if_general_body(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
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proto_tree *tree, usb_conv_info_t *usb_conv_info)
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{
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audio_conv_info_t *audio_conv_info;
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gint offset_start;
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/* the caller has already checked that usb_conv_info!=NULL */
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audio_conv_info = (audio_conv_info_t *)usb_conv_info->class_data;
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if (!audio_conv_info)
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return 0;
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offset_start = offset;
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if (audio_conv_info->ver_major==1) {
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proto_tree_add_item(tree, hf_as_if_gen_term_id,
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tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset++;
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proto_tree_add_item(tree, hf_as_if_gen_delay,
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tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset++;
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proto_tree_add_item(tree, hf_as_if_gen_format,
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tvb, offset, 2, ENC_LITTLE_ENDIAN);
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offset += 2;
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}
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return offset-offset_start;
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}
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static gint
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dissect_usb_audio_descriptor(tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *tree, void *data)
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{
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gint offset = 0;
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usb_conv_info_t *usb_conv_info;
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proto_tree *desc_tree = NULL;
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proto_item *desc_tree_item;
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guint8 desc_len;
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guint8 desc_type;
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guint8 desc_subtype;
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const gchar *subtype_str;
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usb_conv_info = (usb_conv_info_t *)data;
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if (!usb_conv_info || usb_conv_info->interfaceClass!=IF_CLASS_AUDIO)
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return 0;
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desc_len = tvb_get_guint8(tvb, offset);
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desc_type = tvb_get_guint8(tvb, offset+1);
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if (desc_type==CS_INTERFACE &&
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usb_conv_info->interfaceSubclass==AUDIO_IF_SUBCLASS_AUDIOCONTROL) {
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desc_tree = proto_tree_add_subtree(tree, tvb, offset, desc_len,
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ett_usb_audio_desc, &desc_tree_item,
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"Class-specific Audio Control Interface Descriptor");
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dissect_usb_descriptor_header(desc_tree, tvb, offset,
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&aud_descriptor_type_vals_ext);
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offset += 2;
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desc_subtype = tvb_get_guint8(tvb, offset);
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proto_tree_add_item(desc_tree, hf_ac_if_desc_subtype,
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tvb, offset, 1, ENC_LITTLE_ENDIAN);
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subtype_str = try_val_to_str_ext(desc_subtype, &ac_subtype_vals_ext);
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if (subtype_str)
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proto_item_append_text(desc_tree_item, ": %s", subtype_str);
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offset++;
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switch(desc_subtype) {
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case AC_SUBTYPE_HEADER:
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/* these subfunctions return the number of bytes dissected,
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this is not necessarily the length of the body
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as some components are not yet dissected
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we rely on the descriptor's length byte instead */
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dissect_ac_if_hdr_body(tvb, offset, pinfo, desc_tree, usb_conv_info);
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break;
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default:
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break;
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}
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}
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else if (desc_type==CS_INTERFACE &&
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usb_conv_info->interfaceSubclass==AUDIO_IF_SUBCLASS_AUDIOSTREAMING) {
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desc_tree = proto_tree_add_subtree(tree, tvb, offset, desc_len,
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ett_usb_audio_desc, &desc_tree_item,
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"Class-specific Audio Streaming Interface Descriptor");
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dissect_usb_descriptor_header(desc_tree, tvb, offset,
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&aud_descriptor_type_vals_ext);
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offset += 2;
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desc_subtype = tvb_get_guint8(tvb, offset);
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proto_tree_add_item(desc_tree, hf_as_if_desc_subtype,
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tvb, offset, 1, ENC_LITTLE_ENDIAN);
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subtype_str = try_val_to_str_ext(desc_subtype, &as_subtype_vals_ext);
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if (subtype_str)
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proto_item_append_text(desc_tree_item, ": %s", subtype_str);
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offset++;
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switch(desc_subtype) {
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case AS_SUBTYPE_GENERAL:
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dissect_as_if_general_body(tvb, offset, pinfo,
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desc_tree, usb_conv_info);
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break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
/* there are no class-specific endpoint descriptors for audio control */
|
|
else if (desc_type == CS_ENDPOINT &&
|
|
usb_conv_info->interfaceSubclass==AUDIO_IF_SUBCLASS_AUDIOSTREAMING) {
|
|
|
|
desc_tree = proto_tree_add_subtree(tree, tvb, offset, desc_len,
|
|
ett_usb_audio_desc, &desc_tree_item,
|
|
"Class-specific Audio Streaming Endpoint Descriptor");
|
|
|
|
dissect_usb_descriptor_header(desc_tree, tvb, offset,
|
|
&aud_descriptor_type_vals_ext);
|
|
offset += 2;
|
|
|
|
proto_tree_add_item(desc_tree, hf_as_ep_desc_subtype,
|
|
tvb, offset, 1, ENC_LITTLE_ENDIAN);
|
|
}
|
|
else
|
|
return 0;
|
|
|
|
return desc_len;
|
|
}
|
|
|
|
|
|
/* dissector for usb midi bulk data */
|
|
static int
|
|
dissect_usb_audio_bulk(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, void *data)
|
|
{
|
|
usb_conv_info_t *usb_conv_info;
|
|
proto_tree *tree;
|
|
proto_item *ti;
|
|
gint offset;
|
|
guint length = tvb_length(tvb);
|
|
|
|
|
|
/* Reject the packet if data is NULL */
|
|
if (data == NULL)
|
|
return 0;
|
|
usb_conv_info = (usb_conv_info_t *)data;
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "USBAUDIO");
|
|
|
|
ti = proto_tree_add_protocol_format(parent_tree, proto_usb_audio, tvb, 0, -1, "USB Audio");
|
|
tree = proto_item_add_subtree(ti, ett_usb_audio);
|
|
|
|
switch (usb_conv_info->interfaceSubclass)
|
|
{
|
|
case AUDIO_IF_SUBCLASS_MIDISTREAMING:
|
|
offset = 0;
|
|
col_set_str(pinfo->cinfo, COL_INFO, "USB-MIDI Event Packets");
|
|
|
|
while (offset > 0 && (guint) offset < length)
|
|
{
|
|
dissect_usb_midi_event(tvb, pinfo, tree, parent_tree, offset);
|
|
offset += 4;
|
|
}
|
|
break;
|
|
default:
|
|
offset = 0;
|
|
proto_tree_add_expert(tree, pinfo, &ei_usb_audio_undecoded, tvb, offset, length - offset);
|
|
}
|
|
|
|
return tvb_length(tvb);
|
|
}
|
|
|
|
static void
|
|
midi_data_reassemble_init(void)
|
|
{
|
|
reassembly_table_init(&midi_data_reassembly_table,
|
|
&addresses_reassembly_table_functions);
|
|
}
|
|
|
|
void
|
|
proto_register_usb_audio(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_midi_cable_number,
|
|
{ "Cable Number", "usbaudio.midi.cable_number", FT_UINT8, BASE_HEX,
|
|
NULL, 0xF0, NULL, HFILL }},
|
|
{ &hf_midi_code_index,
|
|
{ "Code Index", "usbaudio.midi.code_index", FT_UINT8, BASE_HEX,
|
|
VALS(code_index_vals), 0x0F, NULL, HFILL }},
|
|
{ &hf_midi_event,
|
|
{ "MIDI Event", "usbaudio.midi.event", FT_UINT24, BASE_HEX,
|
|
NULL, 0, NULL, HFILL }},
|
|
|
|
{ &hf_ac_if_desc_subtype,
|
|
{ "Subtype", "usbaudio.ac_if_subtype", FT_UINT8, BASE_HEX|BASE_EXT_STRING,
|
|
&ac_subtype_vals_ext, 0x00, "bDescriptorSubtype", HFILL }},
|
|
{ &hf_ac_if_hdr_ver,
|
|
{ "Version", "usbaudio.ac_if_hdr.bcdADC",
|
|
FT_DOUBLE, BASE_NONE, NULL, 0, "bcdADC", HFILL }},
|
|
{ &hf_ac_if_hdr_total_len,
|
|
{ "Total length", "usbaudio.ac_if_hdr.wTotalLength",
|
|
FT_UINT16, BASE_DEC, NULL, 0x00, "wTotalLength", HFILL }},
|
|
{ &hf_ac_if_hdr_bInCollection,
|
|
{ "Total number of interfaces", "usbaudio.ac_if_hdr.bInCollection",
|
|
FT_UINT8, BASE_DEC, NULL, 0x00, "bInCollection", HFILL }},
|
|
{ &hf_ac_if_hdr_if_num,
|
|
{ "Interface number", "usbaudio.ac_if_hdr.baInterfaceNr",
|
|
FT_UINT8, BASE_DEC, NULL, 0x00, "baInterfaceNr", HFILL }},
|
|
{ &hf_as_if_desc_subtype,
|
|
{ "Subtype", "usbaudio.as_if_subtype", FT_UINT8, BASE_HEX|BASE_EXT_STRING,
|
|
&as_subtype_vals_ext, 0x00, "bDescriptorSubtype", HFILL }},
|
|
{ &hf_as_if_gen_term_id,
|
|
{ "Terminal ID", "usbaudio.as_if_gen.bTerminalLink",
|
|
FT_UINT8, BASE_DEC, NULL, 0x00, "bTerminalLink", HFILL }},
|
|
{ &hf_as_if_gen_delay,
|
|
{ "Interface delay in frames", "usbaudio.as_if_gen.bDelay",
|
|
FT_UINT8, BASE_DEC, NULL, 0x00, "bDelay", HFILL }},
|
|
{ &hf_as_if_gen_format,
|
|
{ "Format", "usbaudio.as_if_gen.wFormatTag",
|
|
FT_UINT16, BASE_HEX, NULL, 0x00, "wFormatTag", HFILL }},
|
|
{ &hf_as_ep_desc_subtype,
|
|
{ "Subtype", "usbaudio.as_ep_subtype", FT_UINT8,
|
|
BASE_HEX, NULL, 0x00, "bDescriptorSubtype", HFILL }},
|
|
|
|
{ &hf_sysex_msg_fragments,
|
|
{ "Message fragments", "usbaudio.sysex.fragments",
|
|
FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL }},
|
|
{ &hf_sysex_msg_fragment,
|
|
{ "Message fragment", "usbaudio.sysex.fragment",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL }},
|
|
{ &hf_sysex_msg_fragment_overlap,
|
|
{ "Message fragment overlap", "usbaudio.sysex.fragment.overlap",
|
|
FT_BOOLEAN, 0, NULL, 0x00, NULL, HFILL }},
|
|
{ &hf_sysex_msg_fragment_overlap_conflicts,
|
|
{ "Message fragment overlapping with conflicting data",
|
|
"usbaudio.sysex.fragment.overlap.conflicts",
|
|
FT_BOOLEAN, 0, NULL, 0x00, NULL, HFILL }},
|
|
{ &hf_sysex_msg_fragment_multiple_tails,
|
|
{ "Message has multiple tail fragments",
|
|
"usbaudio.sysex.fragment.multiple_tails",
|
|
FT_BOOLEAN, 0, NULL, 0x00, NULL, HFILL }},
|
|
{ &hf_sysex_msg_fragment_too_long_fragment,
|
|
{ "Message fragment too long", "usbaudio.sysex.fragment.too_long_fragment",
|
|
FT_BOOLEAN, 0, NULL, 0x00, NULL, HFILL }},
|
|
{ &hf_sysex_msg_fragment_error,
|
|
{ "Message defragmentation error", "usbaudio.sysex.fragment.error",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL }},
|
|
{ &hf_sysex_msg_fragment_count,
|
|
{ "Message fragment count", "usbaudio.sysex.fragment.count",
|
|
FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL }},
|
|
{ &hf_sysex_msg_reassembled_in,
|
|
{ "Reassembled in", "usbaudio.sysex.reassembled.in",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL }},
|
|
{ &hf_sysex_msg_reassembled_length,
|
|
{ "Reassembled length", "usbaudio.sysex.reassembled.length",
|
|
FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL }},
|
|
{ &hf_sysex_msg_reassembled_data,
|
|
{ "Reassembled data", "usbaudio.sysex.reassembled.data",
|
|
FT_BYTES, BASE_NONE, NULL, 0x00, NULL, HFILL }}
|
|
};
|
|
|
|
static gint *usb_audio_subtrees[] = {
|
|
&ett_usb_audio,
|
|
&ett_usb_audio_desc,
|
|
&ett_sysex_msg_fragment,
|
|
&ett_sysex_msg_fragments
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_usb_audio_undecoded, { "usbaudio.undecoded", PI_UNDECODED, PI_WARN, "Not dissected yet (report to wireshark.org)", EXPFILL }},
|
|
};
|
|
|
|
expert_module_t *expert_usb_audio;
|
|
|
|
proto_usb_audio = proto_register_protocol("USB Audio", "USBAUDIO", "usbaudio");
|
|
proto_register_field_array(proto_usb_audio, hf, array_length(hf));
|
|
proto_register_subtree_array(usb_audio_subtrees, array_length(usb_audio_subtrees));
|
|
expert_usb_audio = expert_register_protocol(proto_usb_audio);
|
|
expert_register_field_array(expert_usb_audio, ei, array_length(ei));
|
|
register_init_routine(&midi_data_reassemble_init);
|
|
|
|
new_register_dissector("usbaudio", dissect_usb_audio_bulk, proto_usb_audio);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_usb_audio(void)
|
|
{
|
|
dissector_handle_t usb_audio_bulk_handle, usb_audio_descr_handle;
|
|
|
|
usb_audio_descr_handle = new_create_dissector_handle(
|
|
dissect_usb_audio_descriptor, proto_usb_audio);
|
|
dissector_add_uint("usb.descriptor", IF_CLASS_AUDIO, usb_audio_descr_handle);
|
|
|
|
usb_audio_bulk_handle = find_dissector("usbaudio");
|
|
dissector_add_uint("usb.bulk", IF_CLASS_AUDIO, usb_audio_bulk_handle);
|
|
|
|
sysex_handle = find_dissector("sysex");
|
|
}
|
|
/*
|
|
* Editor modelines
|
|
*
|
|
* Local Variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* ex: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|