Open Sound Control dissector.
Dissector for specification at http://opensoundcontrol.org/spec-1_0. - use value_string - add integer oferflow protection - remove trailing white space - add capture file to bug tracker: Bug 9837 - fix warnings by tools/fix-encodings-args.pl - make use of VALS - dissect MIDI controller messages separately Change-Id: Iab0dc01d4bf1c08eac175b6af1dd07809090c35a Reviewed-on: https://code.wireshark.org/review/454 Reviewed-by: Evan Huus <eapache@gmail.com> Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com> Tested-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
This commit is contained in:
parent
c9dd46c278
commit
93a59e74c3
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@ -1020,6 +1020,7 @@ set(DISSECTOR_SRC
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dissectors/packet-openvpn.c
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dissectors/packet-openwire.c
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dissectors/packet-opsi.c
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dissectors/packet-osc.c
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dissectors/packet-osi-options.c
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dissectors/packet-osi.c
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dissectors/packet-ositp.c
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@ -939,6 +939,7 @@ DISSECTOR_SRC = \
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packet-opensafety.c \
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packet-openvpn.c \
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packet-openwire.c \
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packet-osc.c \
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packet-osi-options.c \
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packet-osi.c \
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packet-ositp.c \
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@ -0,0 +1,848 @@
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/* packet-osc.c
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* Routines for "Open Sound Control" packet dissection
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* Copyright 2014 Hanspeter Portner <dev@open-music-kontrollers.ch>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/*
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* Specification 1.0 (http://opensoundcontrol.org/spec-1_0)
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* - based on default argument types: i,f,s,b
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* - including widely used extension types: T,F,N,I,h,d,t,S,c,r,m
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <string.h>
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#include <epan/packet.h>
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#include <epan/conversation.h>
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/* Open Sound Control (OSC) argument types enumeration */
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typedef enum _OSC_Type {
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OSC_INT32 = 'i',
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OSC_FLOAT = 'f',
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OSC_STRING = 's',
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OSC_BLOB = 'b',
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OSC_TRUE = 'T',
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OSC_FALSE = 'F',
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OSC_NIL = 'N',
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OSC_BANG = 'I',
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OSC_INT64 = 'h',
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OSC_DOUBLE = 'd',
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OSC_TIMETAG = 't',
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OSC_SYMBOL = 'S',
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OSC_CHAR = 'c',
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OSC_RGBA = 'r',
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OSC_MIDI = 'm'
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} OSC_Type;
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/* characters not allowed in OSC path string */
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static const char invalid_path_chars [] = {
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' ', '#', '*', ',', '?', '[', ']', '{', '}',
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'\0'
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};
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/* allowed characters in OSC format string */
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static const char valid_format_chars [] = {
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OSC_INT32, OSC_FLOAT, OSC_STRING, OSC_BLOB,
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OSC_TRUE, OSC_FALSE, OSC_NIL, OSC_BANG,
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OSC_INT64, OSC_DOUBLE, OSC_TIMETAG,
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OSC_SYMBOL, OSC_CHAR, OSC_RGBA, OSC_MIDI,
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'\0'
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};
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#define MIDI_STATUS_CONTROLLER 0xB0
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/* Standard MIDI Message Type */
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static const value_string MIDI_status [] = {
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{ 0x00, "Invalid Message" },
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{ 0x80, "Note Off" },
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{ 0x90, "Note On" },
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{ 0xA0, "Note Pressure" },
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{ MIDI_STATUS_CONTROLLER, "Controller" },
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{ 0xC0, "Program Change" },
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{ 0xD0, "Channel Pressure" },
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{ 0xE0, "Pitch Bender" },
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{ 0xF0, "System Exclusive Begin" },
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{ 0xF1, "MTC Quarter Frame" },
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{ 0xF2, "Song Position" },
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{ 0xF3, "Song Select" },
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{ 0xF6, "Tune Request" },
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{ 0xF8, "Clock" },
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{ 0xFA, "Start" },
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{ 0xFB, "Continue" },
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{ 0xFC, "Stop" },
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{ 0xFE, "Active Sensing" },
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{ 0xFF, "Reset" },
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{0, NULL }
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};
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/* Standard MIDI Controller Numbers */
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static const value_string MIDI_control [] = {
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{ 0x00, "Bank Selection" },
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{ 0x01, "Modulation" },
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{ 0x02, "Breath" },
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{ 0x04, "Foot" },
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{ 0x05, "Portamento Time" },
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{ 0x06, "Data Entry" },
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{ 0x07, "Main Volume" },
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{ 0x08, "Balance" },
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{ 0x0A, "Panpot" },
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{ 0x0B, "Expression" },
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{ 0x0C, "Effect1" },
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{ 0x0D, "Effect2" },
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{ 0x10, "General Purpose 1" },
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{ 0x11, "General Purpose 2" },
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{ 0x12, "General Purpose 3" },
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{ 0x13, "General Purpose 4" },
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{ 0x20, "Bank Selection" },
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{ 0x21, "Modulation" },
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{ 0x22, "Breath" },
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{ 0x24, "Foot" },
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{ 0x25, "Portamento Time" },
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{ 0x26, "Data Entry" },
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{ 0x27, "Main Volume" },
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{ 0x28, "Balance" },
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{ 0x2A, "Panpot" },
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{ 0x2B, "Expression" },
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{ 0x2C, "Effect1" },
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{ 0x2D, "Effect2" },
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{ 0x30, "General Purpose 1" },
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{ 0x31, "General Purpose 2" },
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{ 0x32, "General Purpose 3" },
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{ 0x33, "General Purpose 4" },
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{ 0x40, "Sustain Pedal" },
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{ 0x41, "Portamento" },
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{ 0x42, "Sostenuto" },
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{ 0x43, "Soft Pedal" },
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{ 0x44, "Legato Foot Switch" },
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{ 0x45, "Hold2" },
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{ 0x46, "SC1 Sound Variation" },
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{ 0x47, "SC2 Timbre" },
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{ 0x48, "SC3 Release Time" },
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{ 0x49, "SC4 Attack Time" },
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{ 0x4A, "SC5 Brightness" },
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{ 0x4B, "SC6" },
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{ 0x4C, "SC7" },
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{ 0x4D, "SC8" },
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{ 0x4E, "SC9" },
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{ 0x4F, "SC10" },
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{ 0x50, "General Purpose 5" },
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{ 0x51, "General Purpose 6" },
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{ 0x52, "General Purpose 7" },
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{ 0x53, "General Purpose 8" },
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{ 0x54, "Portamento Control" },
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{ 0x5B, "E1 Reverb Depth" },
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{ 0x5C, "E2 Tremolo Depth" },
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{ 0x5D, "E3 Chorus Depth" },
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{ 0x5E, "E4 Detune Depth" },
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{ 0x5F, "E5 Phaser Depth" },
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{ 0x60, "Data Increment" },
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{ 0x61, "Data Decrement" },
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{ 0x62, "Non-registered Parameter Number" },
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{ 0x63, "Non-registered Parameter Number" },
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{ 0x64, "Registered Parameter Number" },
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{ 0x65, "Registered Parameter Number" },
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{ 0x78, "All Sounds Off" },
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{ 0x79, "Reset Controllers" },
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{ 0x7A, "Local Control Switch" },
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{ 0x7B, "All Notes Off" },
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{ 0x7C, "Omni Off" },
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{ 0x7D, "Omni On" },
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{ 0x7E, "Mono1" },
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{ 0x7F, "Mono2" },
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{ 0, NULL }
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};
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static const char *immediate_fmt = "%s";
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static const char *immediate_str = "Immediate";
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static const char *bundle_str = "#bundle";
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/* Initialize the protocol and registered fields */
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static dissector_handle_t osc_handle = NULL;
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static int proto_osc = -1;
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static int hf_osc_bundle_type = -1;
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static int hf_osc_message_type = -1;
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static int hf_osc_message_header_type = -1;
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static int hf_osc_message_blob_type = -1;
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static int hf_osc_message_midi_type = -1;
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static int hf_osc_message_rgba_type = -1;
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static int hf_osc_bundle_timetag_type = -1;
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static int hf_osc_bundle_element_size_type = -1;
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static int hf_osc_message_path_type = -1;
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static int hf_osc_message_format_type = -1;
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static int hf_osc_message_int32_type = -1;
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static int hf_osc_message_float_type = -1;
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static int hf_osc_message_string_type = -1;
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static int hf_osc_message_blob_size_type = -1;
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static int hf_osc_message_blob_data_type = -1;
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static int hf_osc_message_true_type = -1;
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static int hf_osc_message_false_type = -1;
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static int hf_osc_message_nil_type = -1;
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static int hf_osc_message_bang_type = -1;
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static int hf_osc_message_int64_type = -1;
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static int hf_osc_message_double_type = -1;
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static int hf_osc_message_timetag_type = -1;
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static int hf_osc_message_symbol_type = -1;
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static int hf_osc_message_char_type = -1;
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static int hf_osc_message_rgba_red_type = -1;
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static int hf_osc_message_rgba_green_type = -1;
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static int hf_osc_message_rgba_blue_type = -1;
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static int hf_osc_message_rgba_alpha_type = -1;
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static int hf_osc_message_midi_channel_type = -1;
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static int hf_osc_message_midi_status_type = -1;
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static int hf_osc_message_midi_data1_type = -1;
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static int hf_osc_message_midi_data2_type = -1;
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static int hf_osc_message_midi_controller_type = -1;
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static int hf_osc_message_midi_value_type = -1;
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/* Initialize the subtree pointers */
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static int ett_osc_packet = -1;
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static int ett_osc_bundle = -1;
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static int ett_osc_message = -1;
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static int ett_osc_message_header = -1;
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static int ett_osc_blob = -1;
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static int ett_osc_rgba = -1;
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static int ett_osc_midi = -1;
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/* check for valid path string */
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static int
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is_valid_path(const char *path)
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{
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const char *ptr;
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if(path[0] != '/')
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return 0;
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for(ptr=invalid_path_chars; *ptr!='\0'; ptr++)
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if(strchr(path+1, *ptr) != NULL)
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return 0;
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return 1;
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}
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/* check for valid format string */
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static int
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is_valid_format(const char *format)
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{
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const char *ptr;
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if(format[0] != ',')
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return 0;
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for(ptr=format+1; *ptr!='\0'; ptr++)
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if(strchr(valid_format_chars, *ptr) == NULL)
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return 0;
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return 1;
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}
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/* Dissect OSC message */
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static int
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dissect_osc_message(tvbuff_t *tvb, proto_item *ti, proto_tree *osc_tree, gint offset, gint len)
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{
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proto_tree *message_tree = NULL;
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proto_tree *header_tree = NULL;
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gint slen;
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gint rem;
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gint end = offset + len;
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const gchar *path = NULL;
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gint path_len;
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gint path_offset;
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const gchar *format = NULL;
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gint format_offset;
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gint format_len;
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const gchar *ptr = NULL;
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/* peek/read path */
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path_offset = offset;
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path = tvb_get_const_stringz(tvb, path_offset, &path_len);
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if( (rem = path_len%4) ) path_len += 4-rem;
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if(!is_valid_path(path))
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return -1;
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/* peek/read fmt */
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format_offset = path_offset + path_len;
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format = tvb_get_const_stringz(tvb, format_offset, &format_len);
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if( (rem = format_len%4) ) format_len += 4-rem;
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if(!is_valid_format(format))
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return -1;
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/* create message */
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ti = proto_tree_add_none_format(osc_tree, hf_osc_message_type, tvb, offset, len, "Message: %s %s", path, format);
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message_tree = proto_item_add_subtree(ti, ett_osc_message);
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/* append header */
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ti = proto_tree_add_item(message_tree, hf_osc_message_header_type, tvb, offset, path_len+format_len, ENC_NA);
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header_tree = proto_item_add_subtree(ti, ett_osc_message_header);
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/* append path */
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proto_tree_add_item(header_tree, hf_osc_message_path_type, tvb, path_offset, path_len, ENC_ASCII | ENC_NA);
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/* append format */
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proto_tree_add_item(header_tree, hf_osc_message_format_type, tvb, format_offset, format_len, ENC_ASCII | ENC_NA);
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offset += path_len + format_len;
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/* ::parse argument:: */
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ptr = format + 1; /* skip ',' */
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while( (*ptr != '\0') && (offset < end) )
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{
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switch(*ptr)
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{
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case OSC_INT32:
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proto_tree_add_item(message_tree, hf_osc_message_int32_type, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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break;
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case OSC_FLOAT:
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proto_tree_add_item(message_tree, hf_osc_message_float_type, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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break;
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case OSC_STRING:
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slen = tvb_strsize(tvb, offset);
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if( (rem = slen%4) ) slen += 4-rem;
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proto_tree_add_item(message_tree, hf_osc_message_string_type, tvb, offset, slen, ENC_ASCII | ENC_NA);
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offset += slen;
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break;
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case OSC_BLOB:
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{
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proto_item *bi = NULL;
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proto_tree *blob_tree = NULL;
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gint32 blen = tvb_get_ntohl(tvb, offset);
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slen = blen;
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if( (rem = slen%4) ) slen += 4-rem;
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bi = proto_tree_add_none_format(message_tree, hf_osc_message_blob_type, tvb, offset, 4+slen, "Blob: %i bytes", blen);
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blob_tree = proto_item_add_subtree(bi, ett_osc_blob);
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proto_tree_add_int_format_value(blob_tree, hf_osc_message_blob_size_type, tvb, offset, 4, blen, "%i bytes", blen);
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offset += 4;
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/* check for zero length blob */
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if(blen == 0)
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break;
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proto_tree_add_item(blob_tree, hf_osc_message_blob_data_type, tvb, offset, slen, ENC_NA);
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offset += slen;
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break;
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}
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case OSC_TRUE:
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proto_tree_add_item(message_tree, hf_osc_message_true_type, tvb, offset, 0, ENC_NA);
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break;
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case OSC_FALSE:
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proto_tree_add_item(message_tree, hf_osc_message_false_type, tvb, offset, 0, ENC_NA);
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break;
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case OSC_NIL:
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proto_tree_add_item(message_tree, hf_osc_message_nil_type, tvb, offset, 0, ENC_NA);
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break;
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case OSC_BANG:
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proto_tree_add_item(message_tree, hf_osc_message_bang_type, tvb, offset, 0, ENC_NA);
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break;
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case OSC_INT64:
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proto_tree_add_item(message_tree, hf_osc_message_int64_type, tvb, offset, 8, ENC_BIG_ENDIAN);
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offset += 8;
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break;
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case OSC_DOUBLE:
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proto_tree_add_item(message_tree, hf_osc_message_double_type, tvb, offset, 8, ENC_BIG_ENDIAN);
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offset += 8;
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break;
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case OSC_TIMETAG:
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{
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guint32 sec = tvb_get_ntohl(tvb, offset);
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guint32 frac = tvb_get_ntohl(tvb, offset+4);
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nstime_t ns;
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if( (sec == 0UL) && (frac == 1UL) )
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proto_tree_add_time_format_value(message_tree, hf_osc_message_timetag_type, tvb, offset, 8, &ns, immediate_fmt, immediate_str);
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else
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proto_tree_add_item(message_tree, hf_osc_message_timetag_type, tvb, offset, 8, ENC_TIME_NTP | ENC_BIG_ENDIAN);
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offset += 8;
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}
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break;
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case OSC_SYMBOL:
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slen = tvb_strsize(tvb, offset);
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if( (rem = slen%4) ) slen += 4-rem;
|
||||
proto_tree_add_item(message_tree, hf_osc_message_symbol_type, tvb, offset, slen, ENC_ASCII | ENC_NA);
|
||||
offset += slen;
|
||||
break;
|
||||
case OSC_CHAR:
|
||||
offset += 3;
|
||||
proto_tree_add_item(message_tree, hf_osc_message_char_type, tvb, offset, 1, ENC_ASCII | ENC_NA);
|
||||
offset += 1;
|
||||
break;
|
||||
case OSC_RGBA:
|
||||
{
|
||||
proto_item *ri = NULL;
|
||||
proto_tree *rgba_tree = NULL;
|
||||
|
||||
ri = proto_tree_add_item(message_tree, hf_osc_message_rgba_type, tvb, offset, 4, ENC_BIG_ENDIAN);
|
||||
rgba_tree = proto_item_add_subtree(ri, ett_osc_rgba);
|
||||
|
||||
proto_tree_add_item(rgba_tree, hf_osc_message_rgba_red_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
||||
offset += 1;
|
||||
proto_tree_add_item(rgba_tree, hf_osc_message_rgba_green_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
||||
offset += 1;
|
||||
proto_tree_add_item(rgba_tree, hf_osc_message_rgba_blue_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
||||
offset += 1;
|
||||
proto_tree_add_item(rgba_tree, hf_osc_message_rgba_alpha_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
||||
offset += 1;
|
||||
break;
|
||||
}
|
||||
case OSC_MIDI:
|
||||
{
|
||||
const gchar *status_str = NULL;
|
||||
const gchar *control_str = NULL;
|
||||
proto_item *mi = NULL;
|
||||
proto_tree *midi_tree = NULL;
|
||||
guint8 channel;
|
||||
guint8 status;
|
||||
guint8 data1;
|
||||
guint8 data2;
|
||||
|
||||
channel = tvb_get_guint8(tvb, offset);
|
||||
status = tvb_get_guint8(tvb, offset+1);
|
||||
data1 = tvb_get_guint8(tvb, offset+2);
|
||||
data2 = tvb_get_guint8(tvb, offset+3);
|
||||
|
||||
status_str = val_to_str_const(status, MIDI_status, "Unknown");
|
||||
|
||||
if(status == MIDI_STATUS_CONTROLLER) /* MIDI Controller */
|
||||
{
|
||||
control_str = val_to_str_const(data1, MIDI_control, "Unknown");
|
||||
|
||||
mi = proto_tree_add_none_format(message_tree, hf_osc_message_midi_type, tvb, offset, 4,
|
||||
"MIDI: Channel %2i, %s (0x%02x), %s (0x%02x), 0x%02x",
|
||||
channel,
|
||||
status_str, status,
|
||||
control_str, data1,
|
||||
data2);
|
||||
}
|
||||
else
|
||||
mi = proto_tree_add_none_format(message_tree, hf_osc_message_midi_type, tvb, offset, 4,
|
||||
"MIDI: Channel %2i, %s (0x%02x), 0x%02x, 0x%02x",
|
||||
channel,
|
||||
status_str, status,
|
||||
data1, data2);
|
||||
midi_tree = proto_item_add_subtree(mi, ett_osc_midi);
|
||||
|
||||
proto_tree_add_item(midi_tree, hf_osc_message_midi_channel_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
||||
offset += 1;
|
||||
|
||||
proto_tree_add_item(midi_tree, hf_osc_message_midi_status_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
||||
offset += 1;
|
||||
|
||||
if(status == MIDI_STATUS_CONTROLLER)
|
||||
{
|
||||
proto_tree_add_item(midi_tree, hf_osc_message_midi_controller_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
||||
offset += 1;
|
||||
|
||||
proto_tree_add_item(midi_tree, hf_osc_message_midi_value_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
||||
offset += 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
proto_tree_add_item(midi_tree, hf_osc_message_midi_data1_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
||||
offset += 1;
|
||||
|
||||
proto_tree_add_item(midi_tree, hf_osc_message_midi_data2_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
||||
offset += 1;
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
default:
|
||||
/* if we get here, there must be a bug in the dissector */
|
||||
DISSECTOR_ASSERT_NOT_REACHED();
|
||||
break;
|
||||
}
|
||||
ptr++;
|
||||
}
|
||||
|
||||
if(offset != end)
|
||||
return -1;
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Dissect OSC bundle */
|
||||
static int
|
||||
dissect_osc_bundle(tvbuff_t *tvb, proto_item *ti, proto_tree *osc_tree, gint offset, gint len)
|
||||
{
|
||||
const gchar *str;
|
||||
proto_tree *bundle_tree = NULL;
|
||||
gint end = offset + len;
|
||||
guint32 sec;
|
||||
guint32 frac;
|
||||
nstime_t ns;
|
||||
|
||||
/* check for valid #bundle */
|
||||
str = tvb_get_const_stringz(tvb, offset, NULL);
|
||||
if(strncmp(str, bundle_str, 8)) /* no OSC bundle */
|
||||
return -1;
|
||||
|
||||
/* create bundle */
|
||||
ti = proto_tree_add_item(osc_tree, hf_osc_bundle_type, tvb, offset, len, ENC_NA);
|
||||
|
||||
bundle_tree = proto_item_add_subtree(ti, ett_osc_bundle);
|
||||
|
||||
offset += 8; /* skip bundle_str */
|
||||
|
||||
/* read timetag */
|
||||
sec = tvb_get_ntohl(tvb, offset);
|
||||
frac = tvb_get_ntohl(tvb, offset+4);
|
||||
if( (sec == 0UL) && (frac == 1UL) )
|
||||
proto_tree_add_time_format_value(bundle_tree, hf_osc_bundle_timetag_type, tvb, offset, 8, &ns, immediate_fmt, immediate_str);
|
||||
else
|
||||
proto_tree_add_item(bundle_tree, hf_osc_bundle_timetag_type, tvb, offset, 8, ENC_TIME_NTP | ENC_BIG_ENDIAN);
|
||||
offset += 8;
|
||||
|
||||
/* ::read size, read block:: */
|
||||
while(offset < end)
|
||||
{
|
||||
/* peek bundle element size */
|
||||
gint32 size = tvb_get_ntohl(tvb, offset);
|
||||
|
||||
/* read bundle element size */
|
||||
proto_tree_add_int_format_value(bundle_tree, hf_osc_bundle_element_size_type, tvb, offset, 4, size, "%i bytes", size);
|
||||
offset += 4;
|
||||
|
||||
/* check for zero size bundle element */
|
||||
if(size == 0)
|
||||
continue;
|
||||
|
||||
/* peek first bundle element char */
|
||||
switch(tvb_get_guint8(tvb, offset))
|
||||
{
|
||||
case '#': /* this is a bundle */
|
||||
if(dissect_osc_bundle(tvb, ti, bundle_tree, offset, size))
|
||||
return -1;
|
||||
else
|
||||
break;
|
||||
case '/': /* this is a message */
|
||||
if(dissect_osc_message(tvb, ti, bundle_tree, offset, size))
|
||||
return -1;
|
||||
else
|
||||
break;
|
||||
default:
|
||||
return -1; /* neither message nor bundle */
|
||||
}
|
||||
|
||||
/* check for integer overflow */
|
||||
if(size > G_MAXINT - offset)
|
||||
return -1;
|
||||
else
|
||||
offset += size;
|
||||
}
|
||||
|
||||
if(offset != end)
|
||||
return -1;
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Dissect OSC packet */
|
||||
static void
|
||||
dissect_osc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
||||
{
|
||||
gint offset = 0;
|
||||
|
||||
col_set_str(pinfo->cinfo, COL_PROTOCOL, "OSC");
|
||||
/* clear out stuff in the info column */
|
||||
col_clear(pinfo->cinfo, COL_INFO);
|
||||
|
||||
if(tree) /* we are being asked for details */
|
||||
{
|
||||
gint len;
|
||||
proto_item *ti = NULL;
|
||||
proto_tree *osc_tree = NULL;
|
||||
|
||||
/* create OSC packet */
|
||||
ti = proto_tree_add_item(tree, proto_osc, tvb, 0, -1, ENC_NA);
|
||||
osc_tree = proto_item_add_subtree(ti, ett_osc_packet);
|
||||
len = proto_item_get_len(ti);
|
||||
|
||||
/* peek first bundle element char */
|
||||
switch(tvb_get_guint8(tvb, offset))
|
||||
{
|
||||
case '#': /* this is a bundle */
|
||||
if(dissect_osc_bundle(tvb, ti, osc_tree, offset, len))
|
||||
return;
|
||||
else
|
||||
break;
|
||||
case '/': /* this is a message */
|
||||
if(dissect_osc_message(tvb, ti, osc_tree, offset, len))
|
||||
return;
|
||||
else
|
||||
break;
|
||||
default: /* neither message nor bundle */
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* OSC heuristics */
|
||||
static gboolean
|
||||
dissect_osc_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
||||
{
|
||||
gint offset = 0;
|
||||
gint slen;
|
||||
gint rem;
|
||||
const gchar *str = NULL;
|
||||
conversation_t *conversation = NULL;
|
||||
|
||||
/* peek first string */
|
||||
str = tvb_get_const_stringz(tvb, offset, &slen);
|
||||
if(strncmp(str, bundle_str, 8) != 0) /* no OSC bundle */
|
||||
{
|
||||
/* check for valid path */
|
||||
if(!is_valid_path(str))
|
||||
return FALSE;
|
||||
|
||||
/* skip path */
|
||||
if( (rem = slen%4) ) slen += 4-rem;
|
||||
offset += slen;
|
||||
|
||||
/* peek next string */
|
||||
str = tvb_get_const_stringz(tvb, offset, &slen);
|
||||
|
||||
/* check for valid format */
|
||||
if(!is_valid_format(str))
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
/* if we get here, then it's an Open Sound Control packet (bundle or message) */
|
||||
|
||||
/* specify that dissect_osc is to be called directly from now on for packets for this connection */
|
||||
conversation = find_or_create_conversation(pinfo);
|
||||
conversation_set_dissector(conversation, osc_handle);
|
||||
|
||||
/* do the dissection */
|
||||
dissect_osc(tvb, pinfo, tree);
|
||||
|
||||
return TRUE; /* OSC heuristics was matched */
|
||||
}
|
||||
|
||||
/* Register the protocol with Wireshark */
|
||||
void
|
||||
proto_register_osc(void)
|
||||
{
|
||||
static hf_register_info hf[] = {
|
||||
{ &hf_osc_bundle_type, { "Bundle", "osc.bundle",
|
||||
FT_NONE, BASE_NONE,
|
||||
NULL, 0x0,
|
||||
"Bundle structure", HFILL } },
|
||||
{ &hf_osc_bundle_timetag_type, { "Timetag", "osc.bundle.timetag",
|
||||
FT_ABSOLUTE_TIME, ABSOLUTE_TIME_UTC,
|
||||
NULL, 0x0,
|
||||
"Scheduled bundle execution time", HFILL } },
|
||||
|
||||
{ &hf_osc_bundle_element_size_type, { "Size", "osc.bundle.element.size",
|
||||
FT_INT32, BASE_DEC,
|
||||
NULL, 0x0,
|
||||
"Bundle element size", HFILL } },
|
||||
|
||||
{ &hf_osc_message_type, { "Message", "osc.message",
|
||||
FT_NONE, BASE_NONE,
|
||||
NULL, 0x0,
|
||||
"Message structure", HFILL } },
|
||||
{ &hf_osc_message_header_type, { "Header", "osc.message.header",
|
||||
FT_NONE, BASE_NONE,
|
||||
NULL, 0x0,
|
||||
"Message header", HFILL } },
|
||||
{ &hf_osc_message_path_type, { "Path", "osc.message.header.path",
|
||||
FT_STRING, BASE_NONE,
|
||||
NULL, 0x0,
|
||||
"Message path", HFILL } },
|
||||
{ &hf_osc_message_format_type, { "Format", "osc.message.header.format",
|
||||
FT_STRING, BASE_NONE,
|
||||
NULL, 0x0,
|
||||
"Message format", HFILL } },
|
||||
|
||||
{ &hf_osc_message_int32_type, { "Int32", "osc.message.int32",
|
||||
FT_INT32, BASE_DEC,
|
||||
NULL, 0x0,
|
||||
"32bit integer value", HFILL } },
|
||||
{ &hf_osc_message_float_type, { "Float", "osc.message.float",
|
||||
FT_FLOAT, BASE_NONE,
|
||||
NULL, 0x0,
|
||||
"Floating point value", HFILL } },
|
||||
{ &hf_osc_message_string_type, { "String", "osc.message.string",
|
||||
FT_STRING, BASE_NONE,
|
||||
NULL, 0x0,
|
||||
"String value", HFILL } },
|
||||
|
||||
{ &hf_osc_message_blob_type, { "Blob", "osc.message.blob",
|
||||
FT_NONE, BASE_NONE,
|
||||
NULL, 0x0,
|
||||
"Binary blob value", HFILL } },
|
||||
{ &hf_osc_message_blob_size_type, { "Size", "osc.message.blob.size",
|
||||
FT_INT32, BASE_DEC,
|
||||
NULL, 0x0,
|
||||
"Binary blob size", HFILL } },
|
||||
{ &hf_osc_message_blob_data_type, { "Data", "osc.message.blob.data",
|
||||
FT_BYTES, BASE_NONE,
|
||||
NULL, 0x0,
|
||||
"Binary blob data", HFILL } },
|
||||
|
||||
{ &hf_osc_message_true_type, { "True", "osc.message.true",
|
||||
FT_NONE, BASE_NONE,
|
||||
NULL, 0x0,
|
||||
"Boolean true value", HFILL } },
|
||||
{ &hf_osc_message_false_type, { "False", "osc.message.false",
|
||||
FT_NONE, BASE_NONE,
|
||||
NULL, 0x0,
|
||||
"Boolean false value", HFILL } },
|
||||
{ &hf_osc_message_nil_type, { "Nil", "osc.message.nil",
|
||||
FT_NONE, BASE_NONE,
|
||||
NULL, 0x0,
|
||||
"Nil value", HFILL } },
|
||||
{ &hf_osc_message_bang_type, { "Bang", "osc.message.bang",
|
||||
FT_NONE, BASE_NONE,
|
||||
NULL, 0x0,
|
||||
"Infinity, Impulse or Bang value", HFILL } },
|
||||
|
||||
{ &hf_osc_message_int64_type, { "Int64", "osc.message.int64",
|
||||
FT_INT64, BASE_DEC,
|
||||
NULL, 0x0,
|
||||
"64bit integer value", HFILL } },
|
||||
{ &hf_osc_message_double_type, { "Double", "osc.message.double",
|
||||
FT_DOUBLE, BASE_NONE,
|
||||
NULL, 0x0,
|
||||
"Double value", HFILL } },
|
||||
{ &hf_osc_message_timetag_type, { "Timetag", "osc.message.timetag",
|
||||
FT_ABSOLUTE_TIME, ABSOLUTE_TIME_UTC,
|
||||
NULL, 0x0,
|
||||
"NTP time value", HFILL } },
|
||||
|
||||
{ &hf_osc_message_symbol_type, { "Symbol", "osc.message.symbol",
|
||||
FT_STRING, BASE_NONE,
|
||||
NULL, 0x0,
|
||||
"Symbol value", HFILL } },
|
||||
{ &hf_osc_message_char_type, { "Char", "osc.message.char",
|
||||
FT_STRING, BASE_NONE,
|
||||
NULL, 0x0,
|
||||
"Character value", HFILL } },
|
||||
|
||||
{ &hf_osc_message_rgba_type, { "RGBA", "osc.message.rgba",
|
||||
FT_UINT32, BASE_HEX,
|
||||
NULL, 0x0,
|
||||
"RGBA color value", HFILL } },
|
||||
{ &hf_osc_message_rgba_red_type, { "Red", "osc.message.rgba.red",
|
||||
FT_UINT8, BASE_DEC,
|
||||
NULL, 0x0,
|
||||
"Red color component", HFILL } },
|
||||
{ &hf_osc_message_rgba_green_type, { "Green", "osc.message.rgba.green",
|
||||
FT_UINT8, BASE_DEC,
|
||||
NULL, 0x0,
|
||||
"Green color component", HFILL } },
|
||||
{ &hf_osc_message_rgba_blue_type, { "Blue", "osc.message.rgba.blue",
|
||||
FT_UINT8, BASE_DEC,
|
||||
NULL, 0x0,
|
||||
"Blue color component", HFILL } },
|
||||
{ &hf_osc_message_rgba_alpha_type, { "Alpha", "osc.message.rgba.alpha",
|
||||
FT_UINT8, BASE_DEC,
|
||||
NULL, 0x0,
|
||||
"Alpha transparency component", HFILL } },
|
||||
|
||||
{ &hf_osc_message_midi_type, { "MIDI", "osc.message.midi",
|
||||
FT_NONE, BASE_NONE,
|
||||
NULL, 0x0,
|
||||
"MIDI value", HFILL } },
|
||||
{ &hf_osc_message_midi_channel_type, { "Channel", "osc.message.midi.channel",
|
||||
FT_UINT8, BASE_DEC,
|
||||
NULL, 0x0,
|
||||
"MIDI channel", HFILL } },
|
||||
{ &hf_osc_message_midi_status_type, { "Status", "osc.message.midi.status",
|
||||
FT_UINT8, BASE_HEX,
|
||||
VALS(MIDI_status), 0x0,
|
||||
"MIDI status message", HFILL } },
|
||||
{ &hf_osc_message_midi_data1_type, { "Data1", "osc.message.midi.data1",
|
||||
FT_UINT8, BASE_HEX,
|
||||
NULL, 0x0,
|
||||
"MIDI data value 1", HFILL } },
|
||||
{ &hf_osc_message_midi_data2_type, { "Data2", "osc.message.midi.data2",
|
||||
FT_UINT8, BASE_HEX,
|
||||
NULL, 0x0,
|
||||
"MIDI data value 2", HFILL } },
|
||||
{ &hf_osc_message_midi_controller_type, { "Controller", "osc.message.midi.controller",
|
||||
FT_UINT8, BASE_HEX,
|
||||
VALS(MIDI_control), 0x0,
|
||||
"MIDI controller message", HFILL } },
|
||||
{ &hf_osc_message_midi_value_type, { "Value", "osc.message.midi.value",
|
||||
FT_UINT8, BASE_HEX,
|
||||
NULL, 0x0,
|
||||
"MIDI controller value", HFILL } }
|
||||
};
|
||||
|
||||
/* Setup protocol subtree array */
|
||||
static gint *ett[] = {
|
||||
&ett_osc_packet,
|
||||
&ett_osc_bundle,
|
||||
&ett_osc_message,
|
||||
&ett_osc_message_header,
|
||||
&ett_osc_blob,
|
||||
&ett_osc_rgba,
|
||||
&ett_osc_midi
|
||||
};
|
||||
|
||||
proto_osc = proto_register_protocol("Open Sound Control Protocol", "OSC", "osc");
|
||||
|
||||
proto_register_field_array(proto_osc, hf, array_length(hf));
|
||||
proto_register_subtree_array(ett, array_length(ett));
|
||||
}
|
||||
|
||||
void
|
||||
proto_reg_handoff_osc(void)
|
||||
{
|
||||
osc_handle = create_dissector_handle(dissect_osc, proto_osc);
|
||||
|
||||
/* register as heuristic dissector for TCP and UDP connections */
|
||||
heur_dissector_add("tcp", dissect_osc_heur, proto_osc);
|
||||
heur_dissector_add("udp", dissect_osc_heur, proto_osc);
|
||||
}
|
||||
|
||||
/*
|
||||
* 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:
|
||||
*/
|
Loading…
Reference in New Issue