6fd493715e
scanning the tvbuff. Also use "tvb_offset_exists()" before accessing the tvbuff in that loop; the loop is only building the Info column, so it shouldn't throw an exception before building the list. (XXX - it should arguably all be done in one loop, with the Info column built on the fly.) svn path=/trunk/; revision=4672
558 lines
16 KiB
C
558 lines
16 KiB
C
/* packet-slimp3.c
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* Routines for SliMP3 protocol dissection
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*
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* Ashok Narayanan <ashokn@cisco.com>
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*
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* Adds support for the data packet protocol for the SliMP3
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* See www.slimdevices.com for details.
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*
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* $Id: packet-slimp3.c,v 1.4 2002/02/02 02:59:23 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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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
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/conversation.h>
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static int proto_slimp3 = -1;
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static int hf_slimp3_opcode = -1;
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static int hf_slimp3_ir = -1;
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static int hf_slimp3_display = -1;
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static int hf_slimp3_control = -1;
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static int hf_slimp3_hello = -1;
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static int hf_slimp3_i2c = -1;
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static int hf_slimp3_data_request = -1;
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static int hf_slimp3_data = -1;
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static int hf_slimp3_discover_request = -1;
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static int hf_slimp3_discover_response = -1;
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static gint ett_slimp3 = -1;
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static dissector_handle_t slimp3_handle;
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#define UDP_PORT_SLIMP3 1069
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#define SLIMP3_IR 'i'
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#define SLIMP3_CONTROL 's'
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#define SLIMP3_HELLO 'h'
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#define SLIMP3_DATA 'm'
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#define SLIMP3_DATA_REQ 'r'
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#define SLIMP3_DISPLAY 'l'
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#define SLIMP3_I2C '2'
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#define SLIMP3_DISC_REQ 'd'
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#define SLIMP3_DISC_RSP 'D'
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static const value_string slimp3_opcode_vals[] = {
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{ SLIMP3_IR, "Infrared Remote Code" },
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{ SLIMP3_CONTROL, "Stream Control" },
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{ SLIMP3_DATA, "MPEG Data" },
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{ SLIMP3_DATA_REQ, "Data Request" },
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{ SLIMP3_HELLO, "Hello" },
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{ SLIMP3_DISPLAY, "Display" },
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{ SLIMP3_I2C, "I2C" },
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{ SLIMP3_DISC_REQ, "Discovery Request" },
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{ SLIMP3_DISC_RSP, "Discovery Response" },
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{ 0, NULL }
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};
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static const value_string slimp3_ir_codes_jvc[] = {
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{ 0xf786, "One" },
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{ 0xf746, "Two" },
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{ 0xf7c6, "Three" },
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{ 0xf726, "Four" },
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{ 0xf7a6, "Five" },
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{ 0xf766, "Six" },
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{ 0xf7e6, "Seven" },
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{ 0xf716, "Eight" },
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{ 0xf796, "Nine" },
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{ 0xf776, "Ten" },
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{ 0xf7f6, "Picture-In-Picture" },
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/* { 0xf7XX, "Enter" }, */
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{ 0xf70e, "Back" },
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{ 0xf732, "Play" },
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{ 0xf76e, "Forward" },
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{ 0xf743, "Record" },
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{ 0xf7c2, "Stop" },
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{ 0xf7b2, "Pause" },
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/* { 0xf7XX, "TV/Video" }, */
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{ 0xf703, "Display" },
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{ 0xf7b3, "Sleep" },
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{ 0xf7b6, "Guide" },
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{ 0xf70b, "Up" },
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{ 0xf74b, "Left" },
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{ 0xf7cb, "Right" },
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{ 0xf78b, "Down" },
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{ 0xf783, "Menu" },
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{ 0xf72b, "OK" },
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{ 0xf778, "Volume Up" },
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{ 0xf7f8, "Volume Down" },
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{ 0xf70d, "Channel Up" },
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{ 0xf78d, "Channel Down" },
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/* { 0xf7XX, "Mute" }, */
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{ 0xf7ab, "Recall" },
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{ 0xf702, "Power" },
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};
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static const value_string slimp3_display_commands[] = {
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{ 0x1, "Clear Display"},
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{ 0x2, "Cursor to 1st Line Home"},
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{ 0x4, "Mode: Decrement Address, Shift Cursor"},
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{ 0x5, "Mode: Decrement Address, Shift Display"},
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{ 0x6, "Mode: Increment Address, Shift Cursor"},
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{ 0x7, "Mode: Increment Address, Shift Display"},
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{ 0x8, "Display Off"},
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{ 0xd, "Display On, With Blinking"},
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{ 0xe, "Display On, With Cursor"},
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{ 0xf, "Display On, With Cursor And Blinking"},
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{ 0x10, "Move Cursor Left"},
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{ 0x14, "Move Cursor Right"},
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{ 0x18, "Shift Display Left"},
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{ 0x1b, "Shift Display Right"},
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{ 0x30, "Set (8-bit)"},
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{ 0x20, "Set (4-bit)"},
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{ 0xa0, "Cursor to Top Right"},
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{ 0xc0, "Cursor to 2nd Line Home"},
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{ 0, NULL},
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};
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static const value_string slimp3_display_fset8[] = {
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{ 0x0, "Brightness 100%"},
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{ 0x1, "Brightness 75%"},
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{ 0x2, "Brightness 50%"},
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{ 0x3, "Brightness 25%"},
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{ 0, NULL },
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};
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static const value_string slimp3_stream_control[] = {
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{ 1, "Reset buffer, Start New Stream"},
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{ 2, "Pause Playback"},
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{ 4, "Resume Playback"},
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{ 0, NULL },
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};
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static void
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dissect_slimp3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_tree *slimp3_tree = NULL;
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proto_tree *el_tree = NULL;
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proto_item *ti = NULL;
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conversation_t *conversation;
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gint i1;
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gint offset = 0;
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guint16 opcode;
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guint16 error;
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guint32 i;
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guint8 subcode;
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char addc_str[101];
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char *addc_strp;
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "SliMP3");
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opcode = tvb_get_guint8(tvb, offset);
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_add_fstr(pinfo->cinfo, COL_INFO, "%s",
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val_to_str(opcode, slimp3_opcode_vals, "Unknown (%c)"));
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}
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addc_strp = addc_str;
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if (tree) {
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ti = proto_tree_add_item(tree, proto_slimp3, tvb, offset, -1, FALSE);
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slimp3_tree = proto_item_add_subtree(ti, ett_slimp3);
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proto_tree_add_uint(slimp3_tree, hf_slimp3_opcode, tvb,
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offset, 1, opcode);
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}
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switch (opcode) {
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case SLIMP3_IR:
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if (tree) {
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proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_ir, tvb, offset+8, 4, FALSE);
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i1 = tvb_get_ntohl(tvb, offset+2);
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proto_tree_add_text(slimp3_tree, tvb, offset+2, 4, "Uptime: %u sec (%u ticks)",
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i1/625000, i1);
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proto_tree_add_text(slimp3_tree, tvb, offset+6, 1, "Code identifier: 0x%0x: %s",
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tvb_get_guint8(tvb, offset+6),
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tvb_get_guint8(tvb, offset+6)==0xff ? "JVC DVD Player" : "Unknown");
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proto_tree_add_text(slimp3_tree, tvb, offset+7, 1, "Code bits: %d",
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tvb_get_guint8(tvb, offset+7));
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i1 = tvb_get_ntohl(tvb, offset+8);
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/* Is this a standard JVC remote code? */
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if (tvb_get_guint8(tvb, offset+6) == 0xff &&
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tvb_get_guint8(tvb, offset+7) == 16) {
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proto_tree_add_text(slimp3_tree, tvb, offset+8, 4,
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"Infrared Code: %s: 0x%0x",
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val_to_str(i1, slimp3_ir_codes_jvc, "Unknown"),
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tvb_get_ntohl(tvb, offset+8));
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} else {
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/* Unknown code; just write it */
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proto_tree_add_text(slimp3_tree, tvb, offset+8, 4, "Infrared Code: 0x%0x",
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tvb_get_ntohl(tvb, offset+8));
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}
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}
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if (check_col(pinfo->cinfo, COL_INFO)) {
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i1 = tvb_get_ntohl(tvb, offset+8);
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if (tvb_get_guint8(tvb, offset+6) == 0xff &&
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tvb_get_guint8(tvb, offset+7) == 16) {
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col_append_fstr(pinfo->cinfo, COL_INFO, ", JVC: %s",
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val_to_str(i1, slimp3_ir_codes_jvc, "Unknown (0x%0x)"));
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} else {
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/* Unknown code; just write it */
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col_append_fstr(pinfo->cinfo, COL_INFO, ", 0x%0x", i1);
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}
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}
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break;
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case SLIMP3_DISPLAY:
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if (tree) {
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int in_str;
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proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_display,
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tvb, offset, 1, FALSE);
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/* Loop through the commands */
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i1 = 18;
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in_str = 0;
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while (i1 < tvb_reported_length_remaining(tvb, offset)) {
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switch(tvb_get_guint8(tvb, offset + i1)) {
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case 0:
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in_str = 0;
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proto_tree_add_text(slimp3_tree, tvb, offset + i1, 2,
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"Delay (%d ms)", tvb_get_guint8(tvb, offset + i1 + 1));
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i1 += 2;
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break;
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case 3:
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if (ti && in_str) {
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proto_item_append_text(ti, "%c",
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tvb_get_guint8(tvb, offset + i1 + 1));
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} else {
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ti = proto_tree_add_text(slimp3_tree, tvb, offset + i1, 2,
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"String: %c",
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tvb_get_guint8(tvb, offset + i1 + 1));
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in_str = 1;
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}
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i1 += 2;
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break;
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case 2:
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in_str = 0;
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ti = proto_tree_add_text(slimp3_tree, tvb, offset + i1, 2,
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"Command: %s",
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val_to_str(tvb_get_guint8(tvb, offset + i1 + 1),
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slimp3_display_commands,
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"Unknown (0x%0x)"));
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if ((tvb_get_guint8(tvb, offset + i1 + 1) & 0xf0) == 0x30) {
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proto_item_append_text(ti, ": %s",
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val_to_str(tvb_get_guint8(tvb, offset + i1 + 2),
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slimp3_display_fset8,
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"Unknown (0x%0x)"));
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i1 += 2 ;
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}
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i1 += 2;
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break;
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default:
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proto_tree_add_text(slimp3_tree, tvb, offset + i1, 2,
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"Unknown 0x%0x, 0x%0x",
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tvb_get_guint8(tvb, offset + i1),
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tvb_get_guint8(tvb, offset + i1 + 1));
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i1 += 2;
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break;
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}
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}
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}
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if (check_col(pinfo->cinfo, COL_INFO)) {
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i1 = 18;
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addc_strp = addc_str;
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while (tvb_offset_exists(tvb, offset + i1)) {
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switch (tvb_get_guint8(tvb, offset + i1)) {
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case 0:
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*addc_strp++ = '.';
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break;
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case 2:
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*addc_strp++ = '|';
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if (tvb_offset_exists(tvb, offset + i1 + 1) &&
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(tvb_get_guint8(tvb, offset + i1 + 1) & 0xf0) == 0x30)
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i1 += 2;
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break;
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case 3:
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if (tvb_offset_exists(tvb, offset + i1 + 1)) {
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if (addc_strp == addc_str ||
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*(addc_strp-1) != ' ' ||
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tvb_get_guint8(tvb, offset + i1 + 1) != ' ')
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*addc_strp++ = tvb_get_guint8(tvb, offset + i1 + 1);
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}
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}
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i1 += 2;
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}
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*addc_strp = 0;
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if (addc_strp - addc_str > 0)
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col_append_fstr(pinfo->cinfo, COL_INFO, ", %s", addc_str);
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}
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break;
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case SLIMP3_CONTROL:
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if (tree) {
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proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_control,
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tvb, offset+1, 1, FALSE);
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proto_tree_add_text(slimp3_tree, tvb, offset+1, 1, "Command: %s",
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val_to_str(tvb_get_guint8(tvb, offset+1),
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slimp3_stream_control, "Unknown (0x%0x)"));
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}
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_fstr(pinfo->cinfo, COL_INFO, ", %s",
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val_to_str(tvb_get_guint8(tvb, offset+1),
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slimp3_stream_control, "Unknown (0x%0x)"));
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}
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break;
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case SLIMP3_HELLO:
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if (tree) {
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proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_hello,
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tvb, offset+1, 1, FALSE);
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if (pinfo->destport == UDP_PORT_SLIMP3) {
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guint8 fw_ver = 0;
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/* Hello response; client->server */
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proto_tree_add_text(slimp3_tree, tvb, offset, 1, "Hello Response (Client --> Server)");
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proto_tree_add_text(slimp3_tree, tvb, offset+1, 1, "Device ID: %d",
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tvb_get_guint8(tvb, offset+1));
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fw_ver = tvb_get_guint8(tvb, offset+2);
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proto_tree_add_text(slimp3_tree, tvb, offset+2, 1, "Firmware Revision: %d.%d (0x%0x)",
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fw_ver>>4, fw_ver & 0xf, fw_ver);
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} else {
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/* Hello request; server->client */
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proto_tree_add_text(slimp3_tree, tvb, offset, 1, "Hello Request (Server --> Client)");
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}
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}
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break;
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case SLIMP3_I2C:
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if (tree) {
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proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_i2c,
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tvb, offset, 1, FALSE);
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if (pinfo->destport == UDP_PORT_SLIMP3) {
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/* Hello response; client->server */
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proto_tree_add_text(slimp3_tree, tvb, offset, -1,
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"I2C Response (Client --> Server)");
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} else {
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/* Hello request; server->client */
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proto_tree_add_text(slimp3_tree, tvb, offset, -1,
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"I2C Request (Server --> Client)");
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}
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}
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if (check_col(pinfo->cinfo, COL_INFO)) {
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if (pinfo->destport == UDP_PORT_SLIMP3) {
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col_append_fstr(pinfo->cinfo, COL_INFO, ", Response");
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} else {
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col_append_fstr(pinfo->cinfo, COL_INFO, ", Request");
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}
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}
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break;
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case SLIMP3_DATA_REQ:
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if (tree) {
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proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_data_request,
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tvb, offset, 1, FALSE);
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proto_tree_add_text(slimp3_tree, tvb, offset+2, 2,
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"Requested offset: %d bytes.",
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tvb_get_ntohs(tvb, offset+2)*2);
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}
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_fstr(pinfo->cinfo, COL_INFO, ", Offset: %d bytes",
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tvb_get_ntohs(tvb, offset+2)*2);
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}
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break;
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case SLIMP3_DATA:
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if (tree) {
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proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_data,
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tvb, offset, 1, FALSE);
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proto_tree_add_text(slimp3_tree, tvb, offset, -1,
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"Length: %d bytes", tvb_reported_length_remaining(tvb, offset+18));
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proto_tree_add_text(slimp3_tree, tvb, offset+2, 2,
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"Buffer offset: %d bytes.",
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tvb_get_ntohs(tvb, offset+2) * 2);
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}
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_fstr(pinfo->cinfo, COL_INFO, ", Length: %d bytes, Offset: %d bytes.",
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tvb_reported_length_remaining(tvb, offset+18),
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tvb_get_ntohs(tvb, offset+2) * 2);
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}
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break;
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case SLIMP3_DISC_REQ:
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if (tree) {
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guint8 fw_ver;
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proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_discover_request,
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tvb, offset, 1, FALSE);
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proto_tree_add_text(slimp3_tree, tvb, offset+1, 1,
|
|
"Device ID: %d.", tvb_get_guint8(tvb, offset+1));
|
|
fw_ver = tvb_get_guint8(tvb, offset+2);
|
|
proto_tree_add_text(slimp3_tree, tvb, offset+2, 1, "Firmware Revision: %d.%d (0x%0x)",
|
|
fw_ver>>4, fw_ver & 0xf, fw_ver);
|
|
}
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
guint8 fw_ver = tvb_get_guint8(tvb, offset+2);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", Device ID: %d. Firmware: %d.%d",
|
|
tvb_get_guint8(tvb, offset+1), fw_ver>>4, fw_ver & 0xf);
|
|
}
|
|
break;
|
|
|
|
case SLIMP3_DISC_RSP:
|
|
if (tree) {
|
|
guint8 fw_ver;
|
|
proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_discover_response,
|
|
tvb, offset, 1, FALSE);
|
|
proto_tree_add_text(slimp3_tree, tvb, offset+2, 4,
|
|
"Server Address: %s.",
|
|
ip_to_str(tvb_get_ptr(tvb, offset+2, 4)));
|
|
proto_tree_add_text(slimp3_tree, tvb, offset+6, 2,
|
|
"Server Port: %d", tvb_get_ntohs(tvb, offset + 6));
|
|
}
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
guint8 fw_ver = tvb_get_guint8(tvb, offset+2);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", Server Address: %s. Server Port: %d",
|
|
ip_to_str(tvb_get_ptr(tvb, offset+2, 4)),
|
|
tvb_get_ntohs(tvb, offset + 6));
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (tree) {
|
|
proto_tree_add_text(slimp3_tree, tvb, offset, -1,
|
|
"Data (%d bytes)", tvb_reported_length_remaining(tvb, offset));
|
|
}
|
|
break;
|
|
|
|
}
|
|
}
|
|
|
|
void
|
|
proto_register_slimp3(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_slimp3_opcode,
|
|
{ "Opcode", "slimp3.opcode",
|
|
FT_UINT8, BASE_DEC, VALS(slimp3_opcode_vals), 0x0,
|
|
"SLIMP3 message type", HFILL }},
|
|
|
|
{ &hf_slimp3_ir,
|
|
{ "Infrared", "slimp3.ir",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
"SLIMP3 Infrared command", HFILL }},
|
|
|
|
{ &hf_slimp3_control,
|
|
{ "Control Packet", "slimp3.control",
|
|
FT_BOOLEAN, BASE_DEC, NULL, 0x0,
|
|
"SLIMP3 control", HFILL }},
|
|
|
|
{ &hf_slimp3_display,
|
|
{ "Display", "slimp3.display",
|
|
FT_BOOLEAN, BASE_DEC, NULL, 0x0,
|
|
"SLIMP3 display", HFILL }},
|
|
|
|
{ &hf_slimp3_hello,
|
|
{ "Hello", "slimp3.hello",
|
|
FT_BOOLEAN, BASE_DEC, NULL, 0x0,
|
|
"SLIMP3 hello", HFILL }},
|
|
|
|
{ &hf_slimp3_i2c,
|
|
{ "I2C", "slimp3.i2c",
|
|
FT_BOOLEAN, BASE_DEC, NULL, 0x0,
|
|
"SLIMP3 I2C", HFILL }},
|
|
|
|
{ &hf_slimp3_data,
|
|
{ "Data", "slimp3.data",
|
|
FT_BOOLEAN, BASE_DEC, NULL, 0x0,
|
|
"SLIMP3 Data", HFILL }},
|
|
|
|
{ &hf_slimp3_data_request,
|
|
{ "Data Request", "slimp3.data_req",
|
|
FT_BOOLEAN, BASE_DEC, NULL, 0x0,
|
|
"SLIMP3 Data Request", HFILL }},
|
|
|
|
{ &hf_slimp3_discover_request,
|
|
{ "Discovery Request", "slimp3.discovery_req",
|
|
FT_BOOLEAN, BASE_DEC, NULL, 0x0,
|
|
"SLIMP3 Discovery Request", HFILL }},
|
|
|
|
{ &hf_slimp3_discover_response,
|
|
{ "Discovery Response", "slimp3.discovery_response",
|
|
FT_BOOLEAN, BASE_DEC, NULL, 0x0,
|
|
"SLIMP3 Discovery Response", HFILL }},
|
|
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_slimp3,
|
|
};
|
|
|
|
proto_slimp3 = proto_register_protocol("SliMP3 Communication Protocol",
|
|
"SliMP3", "slimp3");
|
|
proto_register_field_array(proto_slimp3, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
slimp3_handle = create_dissector_handle(dissect_slimp3, proto_slimp3);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_slimp3(void)
|
|
{
|
|
dissector_add("udp.port", UDP_PORT_SLIMP3, slimp3_handle);
|
|
}
|