epan/dissectors/packet-slimp3.c

   1 /* packet-slimp3.c
   2  * Routines for SliMP3 protocol dissection
   3  *
   4  * Ashok Narayanan <ashokn@cisco.com>
   5  *
   6  * Adds support for the data packet protocol for the SliMP3
   7  * See www.slimdevices.com for details.
   8  *
   9  * $Id$
  10  *
  11  * Wireshark - Network traffic analyzer
  12  * By Gerald Combs <gerald@wireshark.org>
  13  * Copyright 1998 Gerald Combs
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  28  */
  29
  30 #include "config.h"
  31
  32 #include <glib.h>
  33 #include <string.h>
  34 #include <ctype.h>
  35 #include <epan/packet.h>
  36 #include <epan/to_str.h>
  37
  38 static int proto_slimp3 = -1;
  39 static int hf_slimp3_opcode = -1;
  40 static int hf_slimp3_control = -1;
  41 static int hf_slimp3_uptime = -1;
  42 static int hf_slimp3_code_id = -1;
  43 static int hf_slimp3_code_bits = -1;
  44 static int hf_slimp3_infrared_slimp3 = -1;
  45 static int hf_slimp3_infrared_jvc = -1;
  46 static int hf_slimp3_infrared = -1;
  47 static int hf_slimp3_device_id = -1;
  48 static int hf_slimp3_fw_rev = -1;
  49 static int hf_slimp3_data_offset = -1;
  50 static int hf_slimp3_data_command = -1;
  51 static int hf_slimp3_data_write_pointer = -1;
  52 static int hf_slimp3_data_sequence = -1;
  53 static int hf_slimp3_disc_rsp_server_ip = -1;
  54 static int hf_slimp3_disc_rsp_server_port = -1;
  55 static int hf_slimp3_data_ack_write_pointer = -1;
  56 static int hf_slimp3_data_ack_read_pointer = -1;
  57 static int hf_slimp3_data_ack_sequence = -1;
  58 static int hf_slimp3_data_req_offset = -1;
  59
  60 static gint ett_slimp3 = -1;
  61
  62 #define UDP_PORT_SLIMP3_V1    1069
  63 #define UDP_PORT_SLIMP3_V2    3483
  64
  65 #define SLIMP3_IR       'i'
  66 #define SLIMP3_CONTROL  's'
  67 #define SLIMP3_HELLO    'h'
  68 #define SLIMP3_DATA     'm'
  69 #define SLIMP3_DATA_REQ 'r'
  70 #define SLIMP3_DISPLAY  'l'
  71 #define SLIMP3_I2C      '2'
  72 #define SLIMP3_DISC_REQ 'd'
  73 #define SLIMP3_DISC_RSP 'D'
  74 #define SLIMP3_DATA_ACK 'a'
  75
  76 static const value_string slimp3_opcode_vals[] = {
  77         { SLIMP3_IR,       "Infrared Remote Code" },
  78         { SLIMP3_CONTROL,  "Stream Control" },
  79         { SLIMP3_DATA,     "MPEG Data" },
  80         { SLIMP3_DATA_REQ, "Data Request" },
  81         { SLIMP3_HELLO,    "Hello" },
  82         { SLIMP3_DISPLAY,  "Display" },
  83         { SLIMP3_I2C,      "I2C" },
  84         { SLIMP3_DISC_REQ, "Discovery Request" },
  85         { SLIMP3_DISC_RSP, "Discovery Response" },
  86         { SLIMP3_DATA_ACK, "Ack" },
  87         { 0,               NULL }
  88 };
  89
  90 /* IR remote control types */
  91 static const value_string slimp3_ir_types[] = {
  92         { 0x02, "SLIMP3" },
  93         { 0xff, "JVC DVD Player" },
  94
  95         { 0, NULL }
  96 };
  97
  98 /* IR codes for the custom SLIMP3 remote control */
  99 static const value_string slimp3_ir_codes_slimp3[] = {
 100         { 0x76899867, "0" },
 101         { 0x7689f00f, "1" },
 102         { 0x768908f7, "2" },
 103         { 0x76898877, "3" },
 104         { 0x768948b7, "4" },
 105         { 0x7689c837, "5" },
 106         { 0x768928d7, "6" },
 107         { 0x7689a857, "7" },
 108         { 0x76896897, "8" },
 109         { 0x7689e817, "9" },
 110         { 0x7689b04f, "arrow_down" },
 111         { 0x7689906f, "arrow_left" },
 112         { 0x7689d02f, "arrow_right" },
 113         { 0x7689e01f, "arrow_up" },
 114         { 0x768900ff, "voldown" },
 115         { 0x7689807f, "volup" },
 116         { 0x768940bf, "power" },
 117         { 0x7689c03f, "rew" },
 118         { 0x768920df, "pause" },
 119         { 0x7689a05f, "fwd" },
 120         { 0x7689609f, "add" },
 121         { 0x768910ef, "play" },
 122         { 0x768958a7, "search" },
 123         { 0x7689d827, "shuffle" },
 124         { 0x768938c7, "repeat" },
 125         { 0x7689b847, "sleep" },
 126         { 0x76897887, "now_playing" },
 127         { 0x7689f807, "size" },
 128         { 0x768904fb, "brightness" },
 129
 130         { 0,      NULL }
 131 };
 132
 133 /* IR codes for the JVC remote control */
 134 static const value_string slimp3_ir_codes_jvc[] = {
 135         { 0xf786, "One" },
 136         { 0xf746, "Two" },
 137         { 0xf7c6, "Three" },
 138         { 0xf726, "Four" },
 139         { 0xf7a6, "Five" },
 140         { 0xf766, "Six" },
 141         { 0xf7e6, "Seven" },
 142         { 0xf716, "Eight" },
 143         { 0xf796, "Nine" },
 144         { 0xf776, "Ten" },
 145
 146         { 0xf7f6, "Picture-In-Picture" },
 147         /* { 0xf7XX, "Enter" }, */
 148         { 0xf70e, "Back" },
 149         { 0xf732, "Play" },
 150         { 0xf76e, "Forward" },
 151         { 0xf743, "Record" },
 152         { 0xf7c2, "Stop" },
 153         { 0xf7b2, "Pause" },
 154         /* { 0xf7XX, "TV/Video" }, */
 155         { 0xf703, "Display" },
 156         { 0xf7b3, "Sleep" },
 157         { 0xf7b6, "Guide" },
 158         { 0xf70b, "Up" },
 159         { 0xf74b, "Left" },
 160         { 0xf7cb, "Right" },
 161         { 0xf78b, "Down" },
 162         { 0xf783, "Menu" },
 163         { 0xf72b, "OK" },
 164         { 0xf778, "Volume Up" },
 165         { 0xf7f8, "Volume Down" },
 166         { 0xf70d, "Channel Up" },
 167         { 0xf78d, "Channel Down" },
 168         /* { 0xf7XX, "Mute" },  */
 169         { 0xf7ab, "Recall" },
 170         { 0xf702, "Power" },
 171
 172         { 0,      NULL }
 173 };
 174
 175
 176 static const value_string slimp3_display_commands[] = {
 177         {  0x1, "Clear Display"},
 178         {  0x2, "Cursor to 1st Line Home"},
 179
 180         {  0x4, "Mode: Decrement Address, Shift Cursor"},
 181         {  0x5, "Mode: Decrement Address, Shift Display"},
 182         {  0x6, "Mode: Increment Address, Shift Cursor"},
 183         {  0x7, "Mode: Increment Address, Shift Display"},
 184
 185         {  0x8, "Display Off"},
 186         {  0xd, "Display On, With Blinking"},
 187         {  0xe, "Display On, With Cursor"},
 188         {  0xf, "Display On, With Cursor And Blinking"},
 189
 190         { 0x10, "Move Cursor Left"},
 191         { 0x14, "Move Cursor Right"},
 192         { 0x18, "Shift Display Left"},
 193         { 0x1b, "Shift Display Right"},
 194
 195         { 0x30, "Set (8-bit)"},
 196         { 0x20, "Set (4-bit)"},
 197
 198         { 0xa0, "Cursor to Top Right"},
 199         { 0xc0, "Cursor to 2nd Line Home"},
 200
 201         {    0, NULL},
 202 };
 203
 204 static const value_string slimp3_display_fset8[] = {
 205         { 0x0, "Brightness 100%"},
 206         { 0x1, "Brightness 75%"},
 207         { 0x2, "Brightness 50%"},
 208         { 0x3, "Brightness 25%"},
 209
 210         {   0, NULL },
 211 };
 212
 213 static const value_string slimp3_stream_control[] = {
 214         { 1, "Reset buffer, Start New Stream"},
 215         { 2, "Pause Playback"},
 216         { 4, "Resume Playback"},
 217         { 0, NULL },
 218 };
 219
 220
 221 static const value_string slimp3_mpg_control[] = {
 222         { 0, "Go"},           /* Run the decoder */
 223         { 1, "Stop"},         /* Halt decoder but don't reset rptr */
 224         { 3, "Reset"},        /* Halt decoder and reset rptr */
 225
 226         { 0, NULL }
 227 };
 228
 229 #define MAX_LCD_STR_LEN 128
 230 static int
 231 dissect_slimp3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
 232 {
 233         const char      *opcode_str;
 234         proto_tree      *slimp3_tree;
 235         proto_item      *ti;
 236         gint            i1;
 237         gint            offset = 0;
 238         guint16         opcode;
 239         guchar          lcd_char;
 240         char            lcd_str[MAX_LCD_STR_LEN + 1];
 241         int                     to_server = FALSE;
 242         int                     old_protocol = FALSE;
 243         address         tmp_addr;
 244         gboolean        in_str;
 245         int                     lcd_strlen;
 246
 247         /*
 248          * If it doesn't begin with a known opcode, reject it, so that
 249          * traffic that happens to be do or from one of our ports
 250          * doesn't get misidentified as SliMP3 traffic.
 251          */
 252         if (!tvb_bytes_exist(tvb, offset, 1))
 253                 return 0;       /* not even an opcode */
 254         opcode = tvb_get_guint8(tvb, offset);
 255         opcode_str = try_val_to_str(opcode, slimp3_opcode_vals);
 256         if (opcode_str == NULL)
 257                 return 0;
 258
 259         col_set_str(pinfo->cinfo, COL_PROTOCOL, "SliMP3");
 260         col_add_str(pinfo->cinfo, COL_INFO, opcode_str);
 261
 262         ti = proto_tree_add_item(tree, proto_slimp3, tvb, offset, -1, ENC_NA);
 263         slimp3_tree = proto_item_add_subtree(ti, ett_slimp3);
 264
 265         proto_tree_add_uint(slimp3_tree, hf_slimp3_opcode, tvb,
 266                                 offset, 1, opcode);
 267
 268         /* The new protocol (v1.3 and later) uses an IANA-assigned port number.
 269         * It usually uses the same number for both sizes of the conversation, so
 270         * the port numbers can't always be used to determine client and server.
 271         * The new protocol places the clients MAC address in the packet, so that
 272         * is used to identify packets originating at the client.
 273         */
 274         if ((pinfo->destport == UDP_PORT_SLIMP3_V2) && (pinfo->srcport == UDP_PORT_SLIMP3_V2)) {
 275                 TVB_SET_ADDRESS(&tmp_addr, AT_ETHER, tvb, offset+12, 6);
 276                 to_server = ADDRESSES_EQUAL(&tmp_addr, &pinfo->dl_src);
 277         }
 278         else if (pinfo->destport == UDP_PORT_SLIMP3_V2) {
 279                 to_server = TRUE;
 280         }
 281         else if (pinfo->srcport == UDP_PORT_SLIMP3_V2) {
 282                 to_server = FALSE;
 283         }
 284         if (pinfo->destport == UDP_PORT_SLIMP3_V1) {
 285                 to_server = TRUE;
 286                 old_protocol = TRUE;
 287         }
 288         else if (pinfo->srcport == UDP_PORT_SLIMP3_V1) {
 289                 to_server = FALSE;
 290                 old_protocol = TRUE;
 291         }
 292
 293         switch (opcode) {
 294
 295         case SLIMP3_IR:
 296                 /* IR code
 297                 *
 298                 * [0]        'i' as in "IR"
 299                 * [1]        0x00
 300                 * [2..5]     player's time since startup in ticks @625 KHz
 301                 * [6]        IR code id, ff=JVC, 02=SLIMP3
 302                 * [7]        number of meaningful bits - 16 for JVC, 32 for SLIMP3
 303                 * [8..11]    the 32-bit IR code
 304                 * [12..17]   reserved
 305                 */
 306                 if (tree) {
 307                         i1 = tvb_get_ntohl(tvb, offset+2);
 308                         proto_tree_add_uint_format_value(slimp3_tree, hf_slimp3_uptime, tvb, offset+2, 4, i1,
 309                                 "%u sec (%u ticks)", i1/625000, i1);
 310
 311                         proto_tree_add_item(slimp3_tree, hf_slimp3_code_id, tvb, offset+6, 1, ENC_BIG_ENDIAN);
 312                         proto_tree_add_item(slimp3_tree, hf_slimp3_code_bits, tvb, offset+7, 1, ENC_BIG_ENDIAN);
 313
 314                         i1 = tvb_get_ntohl(tvb, offset+8);
 315                         /* Check the code to figure out which remote is being used. */
 316                         if (tvb_get_guint8(tvb, offset+6) == 0x02 &&
 317                                 tvb_get_guint8(tvb, offset+7) == 32) {
 318                                         /* This is the custom SLIMP3 remote. */
 319                                 proto_tree_add_item(slimp3_tree, hf_slimp3_infrared_slimp3, tvb, offset+8, 4, ENC_BIG_ENDIAN);
 320                                 col_append_fstr(pinfo->cinfo, COL_INFO, ", SLIMP3: %s",
 321                                                 val_to_str(i1, slimp3_ir_codes_slimp3, "Unknown (0x%0x)"));
 322                         }
 323                         else if (tvb_get_guint8(tvb, offset+6) == 0xff &&
 324                                  tvb_get_guint8(tvb, offset+7) == 16) {
 325                                 /* This is a JVC DVD player remote */
 326                                 proto_tree_add_item(slimp3_tree, hf_slimp3_infrared_jvc, tvb, offset+8, 4, ENC_BIG_ENDIAN);
 327                                 col_append_fstr(pinfo->cinfo, COL_INFO, ", JVC: %s",
 328                                                 val_to_str(i1, slimp3_ir_codes_jvc, "Unknown (0x%0x)"));
 329                         } else {
 330                                 /* Unknown code; just write it */
 331                                 proto_tree_add_item(slimp3_tree, hf_slimp3_infrared, tvb, offset+8, 4, ENC_BIG_ENDIAN);
 332                                 col_append_fstr(pinfo->cinfo, COL_INFO, ", 0x%0x", i1);
 333                         }
 334                 }
 335                 break;
 336
 337         case SLIMP3_DISPLAY:
 338                 if (tree) {
 339                         /* Loop through the commands */
 340                         i1 = 18;
 341                         in_str = FALSE;
 342                         lcd_strlen = 0;
 343                         while (i1 < tvb_reported_length_remaining(tvb, offset)) {
 344                                 switch(tvb_get_guint8(tvb, offset + i1)) {
 345                                 case 0:
 346                                         in_str = FALSE;
 347                                         lcd_strlen = 0;
 348                                         proto_tree_add_text(slimp3_tree, tvb, offset + i1, 2,
 349                                                         "Delay (%u ms)", tvb_get_guint8(tvb, offset + i1 + 1));
 350                                         i1 += 2;
 351                                         break;
 352                                 case 3:
 353                                         lcd_char = tvb_get_guint8(tvb, offset + i1 + 1);
 354                                         if (!isprint(lcd_char))
 355                                                 lcd_char = '.';
 356                                         if (ti && in_str) {
 357                                                 lcd_strlen += 2;
 358                                                 proto_item_append_text(ti, "%c", lcd_char);
 359                                                 proto_item_set_len(ti, lcd_strlen);
 360                                         } else {
 361                                                 ti = proto_tree_add_text(slimp3_tree, tvb, offset + i1, 2,
 362                                                                          "String: %c", lcd_char);
 363                                                 in_str = TRUE;
 364                                                 lcd_strlen = 2;
 365                                         }
 366                                         i1 += 2;
 367                                         break;
 368
 369                                 case 2:
 370                                         in_str = FALSE;
 371                                         lcd_strlen = 0;
 372                                         ti = proto_tree_add_text(slimp3_tree, tvb, offset + i1, 2,
 373                                                                  "Command: %s",
 374                                                                  val_to_str(tvb_get_guint8(tvb, offset + i1 + 1),
 375                                                                         slimp3_display_commands,
 376                                                                         "Unknown (0x%0x)"));
 377                                         if ((tvb_get_guint8(tvb, offset + i1 + 1) & 0xf0) == 0x30) {
 378                                                 proto_item_append_text(ti, ": %s",
 379                                                                            val_to_str(tvb_get_guint8(tvb, offset + i1 + 2),
 380                                                                                   slimp3_display_fset8,
 381                                                                                   "Unknown (0x%0x)"));
 382                                                 i1 += 2;
 383                                         }
 384                                         i1 += 2;
 385                                         break;
 386
 387                                 default:
 388                                         proto_tree_add_text(slimp3_tree, tvb, offset + i1, 2,
 389                                                         "Unknown 0x%0x, 0x%0x",
 390                                                         tvb_get_guint8(tvb, offset + i1),
 391                                                         tvb_get_guint8(tvb, offset + i1 + 1));
 392                                         i1 += 2;
 393                                         break;
 394                                 }
 395                         }
 396                 }
 397
 398                 i1 = 18;
 399                 lcd_strlen = 0;
 400                 while (tvb_offset_exists(tvb, offset + i1) &&
 401                         lcd_strlen < MAX_LCD_STR_LEN) {
 402                         switch (tvb_get_guint8(tvb, offset + i1)) {
 403
 404                         case 0:
 405                                 lcd_str[lcd_strlen++] = '.';
 406                                 break;
 407
 408                         case 2:
 409                                 lcd_str[lcd_strlen++] = '|';
 410                                 if (tvb_offset_exists(tvb, offset + i1 + 1) &&
 411                                         (tvb_get_guint8(tvb, offset + i1 + 1) & 0xf0) == 0x30)
 412                                 i1 += 2;
 413                                 break;
 414
 415                         case 3:
 416                                 if (tvb_offset_exists(tvb, offset + i1 + 1)) {
 417                                         if ((lcd_strlen < 1) ||
 418                                                 (lcd_str[lcd_strlen-1] != ' ') ||
 419                                                 (tvb_get_guint8(tvb, offset + i1 + 1) != ' ')) {
 420                                                         lcd_char = tvb_get_guint8(tvb, offset + i1 + 1);
 421                                                         lcd_str[lcd_strlen++] = isprint(lcd_char) ? lcd_char : '.';
 422                                         }
 423                                 }
 424                         }
 425
 426                         i1 += 2;
 427                 }
 428                 lcd_str[lcd_strlen] = '\0';
 429                 if (lcd_strlen > 0)
 430                         col_append_fstr(pinfo->cinfo, COL_INFO, ", %s", lcd_str);
 431                 break;
 432
 433         case SLIMP3_CONTROL:
 434                 proto_tree_add_item(slimp3_tree, hf_slimp3_control, tvb, offset+1, 1, ENC_BIG_ENDIAN);
 435                 col_append_fstr(pinfo->cinfo, COL_INFO, ", %s",
 436                                                 val_to_str(tvb_get_guint8(tvb, offset+1),
 437                                                 slimp3_stream_control, "Unknown (0x%0x)"));
 438                 break;
 439
 440         case SLIMP3_HELLO:
 441                 if (tree) {
 442                         if (to_server) {
 443                                 guint8 fw_ver;
 444                                 /* Hello response; client->server */
 445                                 proto_tree_add_text(slimp3_tree, tvb, offset, 1, "Hello Response (Client --> Server)");
 446                                 proto_tree_add_item(slimp3_tree, hf_slimp3_device_id, tvb, offset+1, 1, ENC_BIG_ENDIAN);
 447                                 fw_ver = tvb_get_guint8(tvb, offset+2);
 448                                 proto_tree_add_uint_format_value(slimp3_tree, hf_slimp3_fw_rev, tvb, offset+2, 1, fw_ver,
 449                                                                         "%u.%u (0x%0x)", fw_ver>>4, fw_ver & 0xf, fw_ver);
 450                         } else {
 451                                 /* Hello request; server->client */
 452                                 proto_tree_add_text(slimp3_tree, tvb, offset, 1, "Hello Request (Server --> Client)");
 453                         }
 454                 }
 455                 break;
 456
 457         case SLIMP3_I2C:
 458                 if (to_server) {
 459                         /* Hello response; client->server */
 460                         proto_tree_add_text(slimp3_tree, tvb, offset, -1,
 461                                                 "I2C Response (Client --> Server)");
 462                         col_append_str(pinfo->cinfo, COL_INFO, ", Response");
 463                 } else {
 464                         /* Hello request; server->client */
 465                         proto_tree_add_text(slimp3_tree, tvb, offset, -1,
 466                                                 "I2C Request (Server --> Client)");
 467                         col_append_str(pinfo->cinfo, COL_INFO, ", Request");
 468                 }
 469                 break;
 470
 471         case SLIMP3_DATA_REQ:
 472                 proto_tree_add_item(slimp3_tree, hf_slimp3_data_req_offset, tvb, offset+2, 2, ENC_BIG_ENDIAN);
 473                 col_append_fstr(pinfo->cinfo, COL_INFO, ", Offset: %u bytes",
 474                                         tvb_get_ntohs(tvb, offset+2)*2);
 475                 break;
 476
 477         case SLIMP3_DATA:
 478                 /* MPEG data (v1.3 and later)
 479                 *
 480                 *  [0]       'm'
 481                 *  [1..5]    reserved
 482                 *  [6..7]    Write pointer (in words)
 483                 *  [8..9]    reserved
 484                 *  [10..11]  Sequence number
 485                 *  [12..17]  reserved
 486                 *  [18..]    MPEG data
 487                 */
 488                 if (old_protocol) {
 489                         guint offset_buffer;
 490                         proto_tree_add_text(slimp3_tree, tvb, offset, -1,
 491                                         "Length: %d bytes",
 492                                         tvb_reported_length_remaining(tvb, offset+18));
 493                         offset_buffer = tvb_get_ntohs(tvb, offset+2) * 2;
 494                         proto_tree_add_uint(slimp3_tree, hf_slimp3_data_offset, tvb, offset+2, 2, offset_buffer);
 495
 496                         col_append_fstr(pinfo->cinfo, COL_INFO,
 497                                 ", Length: %d bytes, Offset: %u bytes.",
 498                                 tvb_reported_length_remaining(tvb, offset+18),
 499                                 offset_buffer);
 500                 }
 501                 else {
 502                         guint write_pointer;
 503                         proto_tree_add_item(slimp3_tree, hf_slimp3_data_command, tvb, offset+1, 1, ENC_BIG_ENDIAN);
 504                         proto_tree_add_text(slimp3_tree, tvb, offset, -1,
 505                                         "Length: %d bytes",
 506                                         tvb_reported_length_remaining(tvb, offset+18));
 507                         write_pointer = tvb_get_ntohs(tvb, offset+6) * 2;
 508                         proto_tree_add_uint(slimp3_tree, hf_slimp3_data_write_pointer, tvb, offset+6, 2, write_pointer);
 509                         proto_tree_add_item(slimp3_tree, hf_slimp3_data_sequence, tvb, offset+10, 2, ENC_BIG_ENDIAN);
 510
 511                         col_append_fstr(pinfo->cinfo, COL_INFO,
 512                                 ", %s, %d bytes at %u, Sequence: %u",
 513                                 val_to_str(tvb_get_guint8(tvb, offset+1),
 514                                            slimp3_mpg_control, "Unknown (0x%0x)"),
 515                                 tvb_reported_length_remaining(tvb, offset+18),
 516                                 write_pointer,
 517                                 tvb_get_ntohs(tvb, offset+10));
 518                 }
 519                 break;
 520
 521         case SLIMP3_DISC_REQ:
 522                 {
 523                 guint8 fw_ver;
 524                 proto_tree_add_item(slimp3_tree, hf_slimp3_device_id, tvb, offset+1, 1, ENC_BIG_ENDIAN);
 525                 fw_ver = tvb_get_guint8(tvb, offset+2);
 526                 proto_tree_add_uint_format_value(slimp3_tree, hf_slimp3_fw_rev, tvb, offset+2, 1, fw_ver,
 527                                                         "%u.%u (0x%0x)", fw_ver>>4, fw_ver & 0xf, fw_ver);
 528                 col_append_fstr(pinfo->cinfo, COL_INFO, ", Device ID: %u. Firmware: %u.%u",
 529                                                 tvb_get_guint8(tvb, offset+1), fw_ver>>4, fw_ver & 0xf);
 530                 }
 531                 break;
 532
 533         case SLIMP3_DISC_RSP:
 534                 if (tree) {
 535                         proto_tree_add_item(slimp3_tree, hf_slimp3_disc_rsp_server_ip, tvb, offset+2, 4, ENC_BIG_ENDIAN);
 536                         proto_tree_add_item(slimp3_tree, hf_slimp3_disc_rsp_server_port, tvb, offset+6, 2, ENC_BIG_ENDIAN);
 537                 }
 538
 539                 col_append_fstr(pinfo->cinfo, COL_INFO, ", Server Address: %s. Server Port: %u",
 540                                         tvb_ip_to_str(tvb, offset+2),
 541                                         tvb_get_ntohs(tvb, offset + 6));
 542                 break;
 543
 544         case SLIMP3_DATA_ACK:
 545                 /* Acknowledge MPEG data
 546                 *
 547                 *  [0]       'a'
 548                 *  [1..5]
 549                 *  [6..7]    Write pointer (in words)
 550                 *  [8..9]    Read pointer (in words)
 551                 *  [10..11]  Sequence number
 552                 *  [12..17]  client MAC address (v1.3 and later)
 553                 */
 554                 if (tree) {
 555                         guint pointer;
 556
 557                         pointer = tvb_get_ntohs(tvb, offset+6) * 2;
 558                         proto_tree_add_uint(slimp3_tree, hf_slimp3_data_ack_write_pointer, tvb, offset+6, 2, pointer);
 559                         pointer = tvb_get_ntohs(tvb, offset+8) * 2;
 560                         proto_tree_add_uint(slimp3_tree, hf_slimp3_data_ack_read_pointer, tvb, offset+8, 2, pointer);
 561                         proto_tree_add_item(slimp3_tree, hf_slimp3_data_ack_sequence, tvb, offset+10, 2, ENC_BIG_ENDIAN);
 562                 }
 563
 564                 col_append_fstr(pinfo->cinfo, COL_INFO, ", Sequence: %u",
 565                                         tvb_get_ntohs(tvb, offset+10));
 566                 break;
 567
 568         default:
 569                 if (tree) {
 570                         proto_tree_add_text(slimp3_tree, tvb, offset, -1,
 571                                         "Data (%d bytes)", tvb_reported_length_remaining(tvb, offset));
 572                 }
 573                 break;
 574         }
 575
 576         return tvb_reported_length(tvb);
 577 }
 578
 579 void
 580 proto_register_slimp3(void)
 581 {
 582         static hf_register_info hf[] = {
 583         { &hf_slimp3_opcode,
 584           { "Opcode", "slimp3.opcode",
 585         FT_UINT8, BASE_DEC, VALS(slimp3_opcode_vals), 0x0,
 586                 "SLIMP3 message type", HFILL }},
 587
 588         { &hf_slimp3_control,
 589           { "Control Packet", "slimp3.control",
 590         FT_UINT8, BASE_DEC, VALS(slimp3_stream_control), 0x0,
 591                 "SLIMP3 control", HFILL }},
 592
 593         { &hf_slimp3_uptime,
 594           { "Uptime", "slimp3.uptime",
 595         FT_UINT32, BASE_DEC, NULL, 0x0,
 596                 NULL, HFILL }},
 597
 598         { &hf_slimp3_code_id,
 599           { "Code identifier", "slimp3.code_id",
 600         FT_UINT8, BASE_DEC, VALS(slimp3_ir_types), 0x0,
 601                 NULL, HFILL }},
 602
 603         { &hf_slimp3_code_bits,
 604           { "Code bits", "slimp3.code_bits",
 605         FT_UINT8, BASE_DEC, NULL, 0x0,
 606                 NULL, HFILL }},
 607
 608         { &hf_slimp3_infrared_slimp3,
 609           { "Infrared Code", "slimp3.infrared",
 610         FT_UINT32, BASE_HEX, VALS(slimp3_ir_codes_slimp3), 0x0,
 611                 NULL, HFILL }},
 612
 613         { &hf_slimp3_infrared_jvc,
 614           { "Infrared Code", "slimp3.infrared",
 615         FT_UINT32, BASE_HEX, VALS(slimp3_ir_codes_jvc), 0x0,
 616                 NULL, HFILL }},
 617
 618         { &hf_slimp3_infrared,
 619           { "Infrared Code", "slimp3.infrared",
 620         FT_UINT32, BASE_HEX, NULL, 0x0,
 621                 NULL, HFILL }},
 622
 623         { &hf_slimp3_device_id,
 624           { "Device ID", "slimp3.device_id",
 625         FT_UINT8, BASE_DEC, NULL, 0x0,
 626                 NULL, HFILL }},
 627
 628         { &hf_slimp3_fw_rev,
 629           { "Firmware Revision", "slimp3.fw_rev",
 630         FT_UINT8, BASE_HEX, NULL, 0x0,
 631                 NULL, HFILL }},
 632
 633         { &hf_slimp3_data_offset,
 634           { "Buffer offset", "slimp3.data.offset",
 635         FT_UINT16, BASE_DEC, NULL, 0x0,
 636                 NULL, HFILL }},
 637
 638         { &hf_slimp3_data_command,
 639           { "Command", "slimp3.data.command",
 640         FT_UINT8, BASE_HEX, VALS(slimp3_mpg_control), 0x0,
 641                 NULL, HFILL }},
 642
 643         { &hf_slimp3_data_write_pointer,
 644           { "Write Pointer", "slimp3.data.write_pointer",
 645         FT_UINT16, BASE_DEC, NULL, 0x0,
 646                 NULL, HFILL }},
 647
 648         { &hf_slimp3_data_sequence,
 649           { "Sequence", "slimp3.data.sequence",
 650         FT_UINT16, BASE_DEC, NULL, 0x0,
 651                 NULL, HFILL }},
 652
 653         { &hf_slimp3_disc_rsp_server_ip,
 654           { "Server Address", "slimp3.disc_rsp.server_ip",
 655         FT_IPv4, BASE_NONE, NULL, 0x0,
 656                 NULL, HFILL }},
 657
 658         { &hf_slimp3_disc_rsp_server_port,
 659           { "Server Port", "slimp3.disc_rsp.server_port",
 660         FT_UINT16, BASE_DEC, NULL, 0x0,
 661                 NULL, HFILL }},
 662
 663         { &hf_slimp3_data_ack_write_pointer,
 664           { "Write Pointer", "slimp3.data_ack.write_pointer",
 665         FT_UINT16, BASE_DEC, NULL, 0x0,
 666                 NULL, HFILL }},
 667
 668         { &hf_slimp3_data_ack_read_pointer,
 669           { "Read Pointer", "slimp3.data_ack.read_pointer",
 670         FT_UINT16, BASE_DEC, NULL, 0x0,
 671                 NULL, HFILL }},
 672
 673         { &hf_slimp3_data_ack_sequence,
 674           { "Sequence", "slimp3.data_ack.sequence",
 675         FT_UINT16, BASE_DEC, NULL, 0x0,
 676                 NULL, HFILL }},
 677
 678         { &hf_slimp3_data_req_offset,
 679           { "Requested offset", "slimp3.data_req.offset",
 680         FT_UINT16, BASE_DEC, NULL, 0x0,
 681                 NULL, HFILL }},
 682         };
 683
 684         static gint *ett[] = {
 685                 &ett_slimp3,
 686         };
 687
 688         proto_slimp3 = proto_register_protocol("SliMP3 Communication Protocol",
 689                                                 "SliMP3", "slimp3");
 690         proto_register_field_array(proto_slimp3, hf, array_length(hf));
 691         proto_register_subtree_array(ett, array_length(ett));
 692 }
 693
 694 void
 695 proto_reg_handoff_slimp3(void)
 696 {
 697         dissector_handle_t slimp3_handle;
 698
 699         slimp3_handle = new_create_dissector_handle(dissect_slimp3, proto_slimp3);
 700         dissector_add_uint("udp.port", UDP_PORT_SLIMP3_V1, slimp3_handle);
 701         dissector_add_uint("udp.port", UDP_PORT_SLIMP3_V2, slimp3_handle);
 702 }
 703
 704 /*
 705  * Editor modelines
 706  *
 707  * Local Variables:
 708  * c-basic-offset: 4
 709  * tab-width: 4
 710  * indent-tabs-mode: nil
 711  * End:
 712  *
 713  * ex: set shiftwidth=4 tabstop=4 expandtab:
 714  * :indentSize=4:tabSize=4:noTabs=true:
 715  */