![Alexis La Goutte](/assets/img/avatar_default.png)
(Using sed : sed -i '/^ \* \$Id\$/,+1 d') Fix manually some typo (in export_object_dicom.c and crc16-plain.c) Change-Id: I4c1ae68d1c4afeace8cb195b53c715cf9e1227a8 Reviewed-on: https://code.wireshark.org/review/497 Reviewed-by: Anders Broman <a.broman58@gmail.com>
430 lines
14 KiB
C
430 lines
14 KiB
C
/* packet-usb-audio.c
|
|
*
|
|
* usb audio dissector
|
|
* Tomasz Mon 2012
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <glib.h>
|
|
#include <epan/conversation.h>
|
|
#include <epan/expert.h>
|
|
#include <epan/packet.h>
|
|
#include <epan/reassemble.h>
|
|
#include "packet-usb.h"
|
|
|
|
void proto_register_usb_audio(void);
|
|
void proto_reg_handoff_usb_audio(void);
|
|
|
|
/* protocols and header fields */
|
|
static int proto_usb_audio = -1;
|
|
static int hf_midi_cable_number = -1;
|
|
static int hf_midi_code_index = -1;
|
|
static int hf_midi_event = -1;
|
|
|
|
static reassembly_table midi_data_reassembly_table;
|
|
|
|
static gint ett_usb_audio = -1;
|
|
static gint ett_usb_audio_desc = -1;
|
|
|
|
static dissector_handle_t sysex_handle;
|
|
|
|
#define AUDIO_SUBCLASS_UNDEFINED 0x00
|
|
#define AUDIO_SUBCLASS_AUDIOCONTROL 0x01
|
|
#define AUDIO_SUBCLASS_AUDIOSTREAMING 0x02
|
|
#define AUDIO_SUBCLASS_MIDISTREAMING 0x03
|
|
|
|
#if 0
|
|
static const value_string usb_audio_subclass_vals[] = {
|
|
{AUDIO_SUBCLASS_UNDEFINED, "SUBCLASS_UNDEFINED"},
|
|
{AUDIO_SUBCLASS_AUDIOCONTROL, "AUDIOCONSTROL"},
|
|
{AUDIO_SUBCLASS_AUDIOSTREAMING, "AUDIOSTREAMING"},
|
|
{AUDIO_SUBCLASS_MIDISTREAMING, "MIDISTREAMING"},
|
|
{0, NULL}
|
|
};
|
|
#endif
|
|
|
|
static const value_string code_index_vals[] = {
|
|
{ 0x0, "Miscellaneous (Reserved)" },
|
|
{ 0x1, "Cable events (Reserved)" },
|
|
{ 0x2, "Two-byte System Common message" },
|
|
{ 0x3, "Three-byte System Common message" },
|
|
{ 0x4, "SysEx starts or continues" },
|
|
{ 0x5, "SysEx ends with following single byte/Single-byte System Common Message" },
|
|
{ 0x6, "SysEx ends with following two bytes" },
|
|
{ 0x7, "SysEx ends with following three bytes" },
|
|
{ 0x8, "Note-off" },
|
|
{ 0x9, "Note-on" },
|
|
{ 0xA, "Poly-KeyPress" },
|
|
{ 0xB, "Control Change" },
|
|
{ 0xC, "Program Change" },
|
|
{ 0xD, "Channel Pressure" },
|
|
{ 0xE, "PitchBend Change" },
|
|
{ 0xF, "Single Byte" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* USB audio specification, section A.8 */
|
|
#define CS_INTERFACE 0x24
|
|
#define CS_ENDPOINT 0x25
|
|
|
|
static const value_string aud_descriptor_type_vals[] = {
|
|
{CS_INTERFACE, "audio class interface"},
|
|
{CS_ENDPOINT, "audio class endpoint"},
|
|
{0,NULL}
|
|
};
|
|
static value_string_ext aud_descriptor_type_vals_ext =
|
|
VALUE_STRING_EXT_INIT(aud_descriptor_type_vals);
|
|
|
|
static int hf_sysex_msg_fragments = -1;
|
|
static int hf_sysex_msg_fragment = -1;
|
|
static int hf_sysex_msg_fragment_overlap = -1;
|
|
static int hf_sysex_msg_fragment_overlap_conflicts = -1;
|
|
static int hf_sysex_msg_fragment_multiple_tails = -1;
|
|
static int hf_sysex_msg_fragment_too_long_fragment = -1;
|
|
static int hf_sysex_msg_fragment_error = -1;
|
|
static int hf_sysex_msg_fragment_count = -1;
|
|
static int hf_sysex_msg_reassembled_in = -1;
|
|
static int hf_sysex_msg_reassembled_length = -1;
|
|
static int hf_sysex_msg_reassembled_data = -1;
|
|
|
|
static gint ett_sysex_msg_fragment = -1;
|
|
static gint ett_sysex_msg_fragments = -1;
|
|
|
|
static expert_field ei_usb_audio_undecoded = EI_INIT;
|
|
|
|
static const fragment_items sysex_msg_frag_items = {
|
|
/* Fragment subtrees */
|
|
&ett_sysex_msg_fragment,
|
|
&ett_sysex_msg_fragments,
|
|
/* Fragment fields */
|
|
&hf_sysex_msg_fragments,
|
|
&hf_sysex_msg_fragment,
|
|
&hf_sysex_msg_fragment_overlap,
|
|
&hf_sysex_msg_fragment_overlap_conflicts,
|
|
&hf_sysex_msg_fragment_multiple_tails,
|
|
&hf_sysex_msg_fragment_too_long_fragment,
|
|
&hf_sysex_msg_fragment_error,
|
|
&hf_sysex_msg_fragment_count,
|
|
/* Reassembled in field */
|
|
&hf_sysex_msg_reassembled_in,
|
|
/* Reassembled length field */
|
|
&hf_sysex_msg_reassembled_length,
|
|
&hf_sysex_msg_reassembled_data,
|
|
/* Tag */
|
|
"Message fragments"
|
|
};
|
|
|
|
static inline gboolean
|
|
is_sysex_code(guint8 code)
|
|
{
|
|
return (code == 0x04 || code == 0x05 || code == 0x06 || code == 0x07);
|
|
}
|
|
|
|
static gboolean
|
|
is_last_sysex_packet_in_tvb(tvbuff_t *tvb, gint offset)
|
|
{
|
|
gboolean last = TRUE;
|
|
gint length = tvb_length(tvb);
|
|
|
|
offset += 4;
|
|
while (offset < length)
|
|
{
|
|
guint8 code = tvb_get_guint8(tvb, offset);
|
|
code &= 0x0F;
|
|
|
|
if (is_sysex_code(code))
|
|
{
|
|
last = FALSE;
|
|
break;
|
|
}
|
|
|
|
offset += 4;
|
|
}
|
|
|
|
return last;
|
|
}
|
|
|
|
static void
|
|
dissect_usb_midi_event(tvbuff_t *tvb, packet_info *pinfo,
|
|
proto_tree *usb_audio_tree, proto_tree *parent_tree,
|
|
gint offset)
|
|
{
|
|
guint8 code;
|
|
guint8 cable;
|
|
gboolean save_fragmented;
|
|
proto_tree *tree = NULL;
|
|
|
|
col_set_str(pinfo->cinfo, COL_INFO, "USB-MIDI Event Packets");
|
|
|
|
code = tvb_get_guint8(tvb, offset);
|
|
cable = (code & 0xF0) >> 4;
|
|
code &= 0x0F;
|
|
|
|
if (parent_tree)
|
|
{
|
|
proto_item *ti;
|
|
|
|
ti = proto_tree_add_protocol_format(usb_audio_tree, proto_usb_audio, tvb, offset, 4, "USB Midi Event Packet");
|
|
tree = proto_item_add_subtree(ti, ett_usb_audio);
|
|
proto_tree_add_item(tree, hf_midi_cable_number, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_midi_code_index, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_midi_event, tvb, offset+1, 3, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
save_fragmented = pinfo->fragmented;
|
|
|
|
/* Reassemble SysEx commands */
|
|
if (is_sysex_code(code))
|
|
{
|
|
tvbuff_t* new_tvb = NULL;
|
|
fragment_head *frag_sysex_msg = NULL;
|
|
|
|
pinfo->fragmented = TRUE;
|
|
|
|
if (code == 0x04)
|
|
{
|
|
frag_sysex_msg = fragment_add_seq_next(&midi_data_reassembly_table,
|
|
tvb, offset+1,
|
|
pinfo,
|
|
cable, /* ID for fragments belonging together */
|
|
NULL,
|
|
3,
|
|
TRUE);
|
|
}
|
|
else
|
|
{
|
|
frag_sysex_msg = fragment_add_seq_next(&midi_data_reassembly_table,
|
|
tvb, offset+1,
|
|
pinfo,
|
|
cable, /* ID for fragments belonging together */
|
|
NULL,
|
|
(gint)(code - 4),
|
|
FALSE);
|
|
}
|
|
|
|
if (is_last_sysex_packet_in_tvb(tvb, offset))
|
|
{
|
|
new_tvb = process_reassembled_data(tvb, offset+1, pinfo,
|
|
"Reassembled Message", frag_sysex_msg, &sysex_msg_frag_items,
|
|
NULL, usb_audio_tree);
|
|
|
|
if (code != 0x04) { /* Reassembled */
|
|
col_append_str(pinfo->cinfo, COL_INFO,
|
|
" (SysEx Reassembled)");
|
|
} else { /* Not last packet of reassembled Short Message */
|
|
col_append_str(pinfo->cinfo, COL_INFO,
|
|
" (SysEx fragment)");
|
|
}
|
|
|
|
if (new_tvb)
|
|
{
|
|
call_dissector(sysex_handle, new_tvb, pinfo, parent_tree);
|
|
}
|
|
}
|
|
}
|
|
|
|
pinfo->fragmented = save_fragmented;
|
|
}
|
|
|
|
|
|
static gint
|
|
dissect_usb_audio_descriptor(tvbuff_t *tvb, packet_info *pinfo _U_,
|
|
proto_tree *tree, void *data _U_)
|
|
{
|
|
gint offset = 0;
|
|
guint8 descriptor_len;
|
|
guint8 descriptor_type;
|
|
proto_item *item = NULL;
|
|
proto_tree *desc_tree;
|
|
|
|
descriptor_len = tvb_get_guint8(tvb, offset);
|
|
descriptor_type = tvb_get_guint8(tvb, offset+1);
|
|
|
|
if (descriptor_type == CS_INTERFACE) {
|
|
item = proto_tree_add_text(tree, tvb, offset, descriptor_len,
|
|
"AUDIO CONTROL INTERFACE DESCRIPTOR");
|
|
}
|
|
else if (descriptor_type == CS_ENDPOINT) {
|
|
item = proto_tree_add_text(tree, tvb, offset, descriptor_len,
|
|
"AUDIO CONTROL ENDPOINT DESCRIPTOR");
|
|
}
|
|
else
|
|
return 0;
|
|
|
|
desc_tree = proto_item_add_subtree(item, ett_usb_audio_desc);
|
|
|
|
dissect_usb_descriptor_header(desc_tree, tvb, offset,
|
|
&aud_descriptor_type_vals_ext);
|
|
|
|
return descriptor_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 = NULL;
|
|
guint 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");
|
|
|
|
if (parent_tree)
|
|
{
|
|
proto_item *ti;
|
|
|
|
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_SUBCLASS_MIDISTREAMING:
|
|
offset = 0;
|
|
col_set_str(pinfo->cinfo, COL_INFO, "USB-MIDI Event Packets");
|
|
|
|
while (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_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:
|
|
*/
|