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: packet-slimp3.c,v 1.4 2002/02/02 02:59:23 guy Exp $
  10  *
  11  * Ethereal - Network traffic analyzer
  12  * By Gerald Combs <gerald@ethereal.com>
  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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  28  */
  29
  30 #ifdef HAVE_CONFIG_H
  31 # include "config.h"
  32 #endif
  33
  34 #ifdef HAVE_SYS_TYPES_H
  35 # include <sys/types.h>
  36 #endif
  37
  38 #ifdef HAVE_NETINET_IN_H
  39 # include <netinet/in.h>
  40 #endif
  41
  42 #include <glib.h>
  43 #include <epan/packet.h>
  44 #include <epan/conversation.h>
  45
  46 static int proto_slimp3 = -1;
  47 static int hf_slimp3_opcode = -1;
  48 static int hf_slimp3_ir = -1;
  49 static int hf_slimp3_display = -1;
  50 static int hf_slimp3_control = -1;
  51 static int hf_slimp3_hello = -1;
  52 static int hf_slimp3_i2c = -1;
  53 static int hf_slimp3_data_request = -1;
  54 static int hf_slimp3_data = -1;
  55 static int hf_slimp3_discover_request = -1;
  56 static int hf_slimp3_discover_response = -1;
  57
  58 static gint ett_slimp3 = -1;
  59
  60 static dissector_handle_t slimp3_handle;
  61
  62 #define UDP_PORT_SLIMP3    1069
  63
  64 #define SLIMP3_IR       'i'
  65 #define SLIMP3_CONTROL  's'
  66 #define SLIMP3_HELLO    'h'
  67 #define SLIMP3_DATA     'm'
  68 #define SLIMP3_DATA_REQ 'r'
  69 #define SLIMP3_DISPLAY  'l'
  70 #define SLIMP3_I2C      '2'
  71 #define SLIMP3_DISC_REQ 'd'
  72 #define SLIMP3_DISC_RSP 'D'
  73
  74 static const value_string slimp3_opcode_vals[] = {
  75   { SLIMP3_IR,       "Infrared Remote Code" },
  76   { SLIMP3_CONTROL,  "Stream Control" },
  77   { SLIMP3_DATA,     "MPEG Data" },
  78   { SLIMP3_DATA_REQ, "Data Request" },
  79   { SLIMP3_HELLO,    "Hello" },
  80   { SLIMP3_DISPLAY,  "Display" },
  81   { SLIMP3_I2C,      "I2C" },
  82   { SLIMP3_DISC_REQ, "Discovery Request" },
  83   { SLIMP3_DISC_RSP, "Discovery Response" },
  84   { 0,               NULL }
  85 };
  86
  87 static const value_string slimp3_ir_codes_jvc[] = {
  88     { 0xf786, "One" },
  89     { 0xf746, "Two" },
  90     { 0xf7c6, "Three" },
  91     { 0xf726, "Four" },
  92     { 0xf7a6, "Five" },
  93     { 0xf766, "Six" },
  94     { 0xf7e6, "Seven" },
  95     { 0xf716, "Eight" },
  96     { 0xf796, "Nine" },
  97     { 0xf776, "Ten" },
  98
  99     { 0xf7f6, "Picture-In-Picture" },
 100     /* { 0xf7XX, "Enter" }, */
 101     { 0xf70e, "Back" },
 102     { 0xf732, "Play" },
 103     { 0xf76e, "Forward" },
 104     { 0xf743, "Record" },
 105     { 0xf7c2, "Stop" },
 106     { 0xf7b2, "Pause" },
 107     /* { 0xf7XX, "TV/Video" }, */
 108     { 0xf703, "Display" },
 109     { 0xf7b3, "Sleep" },
 110     { 0xf7b6, "Guide" },
 111     { 0xf70b, "Up" },
 112     { 0xf74b, "Left" },
 113     { 0xf7cb, "Right" },
 114     { 0xf78b, "Down" },
 115     { 0xf783, "Menu" },
 116     { 0xf72b, "OK" },
 117     { 0xf778, "Volume Up" },
 118     { 0xf7f8, "Volume Down" },
 119     { 0xf70d, "Channel Up" },
 120     { 0xf78d, "Channel Down" },
 121     /* { 0xf7XX, "Mute" },  */
 122     { 0xf7ab, "Recall" },
 123     { 0xf702, "Power" },
 124 };
 125
 126 static const value_string slimp3_display_commands[] = {
 127     {  0x1, "Clear Display"},
 128     {  0x2, "Cursor to 1st Line Home"},
 129
 130     {  0x4, "Mode: Decrement Address, Shift Cursor"},
 131     {  0x5, "Mode: Decrement Address, Shift Display"},
 132     {  0x6, "Mode: Increment Address, Shift Cursor"},
 133     {  0x7, "Mode: Increment Address, Shift Display"},
 134
 135     {  0x8, "Display Off"},
 136     {  0xd, "Display On, With Blinking"},
 137     {  0xe, "Display On, With Cursor"},
 138     {  0xf, "Display On, With Cursor And Blinking"},
 139
 140     { 0x10, "Move Cursor Left"},
 141     { 0x14, "Move Cursor Right"},
 142     { 0x18, "Shift Display Left"},
 143     { 0x1b, "Shift Display Right"},
 144
 145     { 0x30, "Set (8-bit)"},
 146     { 0x20, "Set (4-bit)"},
 147
 148     { 0xa0, "Cursor to Top Right"},
 149     { 0xc0, "Cursor to 2nd Line Home"},
 150
 151     {    0, NULL},
 152 };
 153
 154 static const value_string slimp3_display_fset8[] = {
 155     { 0x0, "Brightness 100%"},
 156     { 0x1, "Brightness 75%"},
 157     { 0x2, "Brightness 50%"},
 158     { 0x3, "Brightness 25%"},
 159
 160     {   0, NULL },
 161 };
 162
 163 static const value_string slimp3_stream_control[] = {
 164     { 1, "Reset buffer, Start New Stream"},
 165     { 2, "Pause Playback"},
 166     { 4, "Resume Playback"},
 167     {   0, NULL },
 168 };
 169
 170 static void
 171 dissect_slimp3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 172 {
 173     proto_tree  *slimp3_tree = NULL;
 174     proto_tree  *el_tree = NULL;
 175     proto_item  *ti = NULL;
 176     conversation_t  *conversation;
 177     gint                i1;
 178     gint                offset = 0;
 179     guint16             opcode;
 180     guint16         error;
 181     guint32      i;
 182     guint8       subcode;
 183     char addc_str[101];
 184     char *addc_strp;
 185
 186
 187     if (check_col(pinfo->cinfo, COL_PROTOCOL))
 188         col_set_str(pinfo->cinfo, COL_PROTOCOL, "SliMP3");
 189
 190     opcode = tvb_get_guint8(tvb, offset);
 191
 192     if (check_col(pinfo->cinfo, COL_INFO)) {
 193
 194         col_add_fstr(pinfo->cinfo, COL_INFO, "%s",
 195                      val_to_str(opcode, slimp3_opcode_vals, "Unknown (%c)"));
 196
 197     }
 198
 199     addc_strp = addc_str;
 200     if (tree) {
 201
 202         ti = proto_tree_add_item(tree, proto_slimp3, tvb, offset, -1, FALSE);
 203         slimp3_tree = proto_item_add_subtree(ti, ett_slimp3);
 204
 205         proto_tree_add_uint(slimp3_tree, hf_slimp3_opcode, tvb,
 206                             offset, 1, opcode);
 207     }
 208     switch (opcode) {
 209
 210     case SLIMP3_IR:
 211         if (tree) {
 212             proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_ir, tvb, offset+8, 4, FALSE);
 213
 214             i1 = tvb_get_ntohl(tvb, offset+2);
 215             proto_tree_add_text(slimp3_tree, tvb, offset+2, 4, "Uptime: %u sec (%u ticks)",
 216                                 i1/625000, i1);
 217             proto_tree_add_text(slimp3_tree, tvb, offset+6, 1, "Code identifier: 0x%0x: %s",
 218                                 tvb_get_guint8(tvb, offset+6),
 219                                 tvb_get_guint8(tvb, offset+6)==0xff ? "JVC DVD Player" : "Unknown");
 220             proto_tree_add_text(slimp3_tree, tvb, offset+7, 1, "Code bits: %d",
 221                                 tvb_get_guint8(tvb, offset+7));
 222
 223             i1 = tvb_get_ntohl(tvb, offset+8);
 224             /* Is this a standard JVC remote code? */
 225             if (tvb_get_guint8(tvb, offset+6) == 0xff &&
 226                 tvb_get_guint8(tvb, offset+7) == 16) {
 227
 228                 proto_tree_add_text(slimp3_tree, tvb, offset+8, 4,
 229                                     "Infrared Code: %s: 0x%0x",
 230                                     val_to_str(i1, slimp3_ir_codes_jvc, "Unknown"),
 231                                     tvb_get_ntohl(tvb, offset+8));
 232             } else {
 233                 /* Unknown code; just write it */
 234                 proto_tree_add_text(slimp3_tree, tvb, offset+8, 4, "Infrared Code: 0x%0x",
 235                                     tvb_get_ntohl(tvb, offset+8));
 236             }
 237         }
 238         if (check_col(pinfo->cinfo, COL_INFO)) {
 239             i1 = tvb_get_ntohl(tvb, offset+8);
 240             if (tvb_get_guint8(tvb, offset+6) == 0xff &&
 241                 tvb_get_guint8(tvb, offset+7) == 16) {
 242                 col_append_fstr(pinfo->cinfo, COL_INFO, ", JVC: %s",
 243                                 val_to_str(i1, slimp3_ir_codes_jvc, "Unknown (0x%0x)"));
 244             } else {
 245                 /* Unknown code; just write it */
 246                 col_append_fstr(pinfo->cinfo, COL_INFO, ", 0x%0x", i1);
 247             }
 248         }
 249         break;
 250
 251     case SLIMP3_DISPLAY:
 252         if (tree) {
 253             int in_str;
 254
 255             proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_display,
 256                                        tvb, offset, 1, FALSE);
 257
 258             /* Loop through the commands */
 259             i1 = 18;
 260             in_str = 0;
 261             while (i1 < tvb_reported_length_remaining(tvb, offset)) {
 262                 switch(tvb_get_guint8(tvb, offset + i1)) {
 263                 case 0:
 264                     in_str = 0;
 265                     proto_tree_add_text(slimp3_tree, tvb, offset + i1, 2,
 266                                         "Delay (%d ms)", tvb_get_guint8(tvb, offset + i1 + 1));
 267                     i1 += 2;
 268                     break;
 269                 case 3:
 270                     if (ti && in_str) {
 271                         proto_item_append_text(ti, "%c",
 272                                                tvb_get_guint8(tvb, offset + i1 + 1));
 273                     } else {
 274                         ti = proto_tree_add_text(slimp3_tree, tvb, offset + i1, 2,
 275                                                  "String: %c",
 276                                                  tvb_get_guint8(tvb, offset + i1 + 1));
 277                         in_str = 1;
 278                     }
 279                     i1 += 2;
 280                     break;
 281
 282                 case 2:
 283                     in_str = 0;
 284                     ti = proto_tree_add_text(slimp3_tree, tvb, offset + i1, 2,
 285                                              "Command: %s",
 286                                              val_to_str(tvb_get_guint8(tvb, offset + i1 + 1),
 287                                                         slimp3_display_commands,
 288                                                         "Unknown (0x%0x)"));
 289                     if ((tvb_get_guint8(tvb, offset + i1 + 1) & 0xf0) == 0x30) {
 290                         proto_item_append_text(ti, ": %s",
 291                                                val_to_str(tvb_get_guint8(tvb, offset + i1 + 2),
 292                                                           slimp3_display_fset8,
 293                                                           "Unknown (0x%0x)"));
 294                         i1 += 2 ;
 295                     }
 296                     i1 += 2;
 297                     break;
 298
 299                 default:
 300                     proto_tree_add_text(slimp3_tree, tvb, offset + i1, 2,
 301                                         "Unknown 0x%0x, 0x%0x",
 302                                         tvb_get_guint8(tvb, offset + i1),
 303                                         tvb_get_guint8(tvb, offset + i1 + 1));
 304                     i1 += 2;
 305                     break;
 306                 }
 307             }
 308         }
 309
 310         if (check_col(pinfo->cinfo, COL_INFO)) {
 311             i1 = 18;
 312             addc_strp = addc_str;
 313             while (tvb_offset_exists(tvb, offset + i1)) {
 314                 switch (tvb_get_guint8(tvb, offset + i1)) {
 315
 316                 case 0:
 317                     *addc_strp++ = '.';
 318                     break;
 319
 320                 case 2:
 321                     *addc_strp++ = '|';
 322                     if (tvb_offset_exists(tvb, offset + i1 + 1) &&
 323                           (tvb_get_guint8(tvb, offset + i1 + 1) & 0xf0) == 0x30)
 324                         i1 += 2;
 325                     break;
 326
 327                 case 3:
 328                     if (tvb_offset_exists(tvb, offset + i1 + 1)) {
 329                         if (addc_strp == addc_str ||
 330                               *(addc_strp-1) != ' ' ||
 331                               tvb_get_guint8(tvb, offset + i1 + 1) != ' ')
 332                             *addc_strp++ = tvb_get_guint8(tvb, offset + i1 + 1);
 333                     }
 334                 }
 335                 i1 += 2;
 336             }
 337             *addc_strp = 0;
 338             if (addc_strp - addc_str > 0)
 339                 col_append_fstr(pinfo->cinfo, COL_INFO, ", %s", addc_str);
 340         }
 341
 342         break;
 343
 344     case SLIMP3_CONTROL:
 345         if (tree) {
 346             proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_control,
 347                                        tvb, offset+1, 1, FALSE);
 348             proto_tree_add_text(slimp3_tree, tvb, offset+1, 1, "Command: %s",
 349                                 val_to_str(tvb_get_guint8(tvb, offset+1),
 350                                            slimp3_stream_control, "Unknown (0x%0x)"));
 351         }
 352
 353         if (check_col(pinfo->cinfo, COL_INFO)) {
 354             col_append_fstr(pinfo->cinfo, COL_INFO, ", %s",
 355                             val_to_str(tvb_get_guint8(tvb, offset+1),
 356                                        slimp3_stream_control, "Unknown (0x%0x)"));
 357         }
 358         break;
 359
 360     case SLIMP3_HELLO:
 361         if (tree) {
 362             proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_hello,
 363                                        tvb, offset+1, 1, FALSE);
 364             if (pinfo->destport == UDP_PORT_SLIMP3) {
 365                 guint8 fw_ver = 0;
 366                 /* Hello response; client->server */
 367                 proto_tree_add_text(slimp3_tree, tvb, offset, 1, "Hello Response (Client --> Server)");
 368                 proto_tree_add_text(slimp3_tree, tvb, offset+1, 1, "Device ID: %d",
 369                                     tvb_get_guint8(tvb, offset+1));
 370                 fw_ver = tvb_get_guint8(tvb, offset+2);
 371                 proto_tree_add_text(slimp3_tree, tvb, offset+2, 1, "Firmware Revision: %d.%d (0x%0x)",
 372                                     fw_ver>>4, fw_ver & 0xf, fw_ver);
 373             } else {
 374                 /* Hello request; server->client */
 375                 proto_tree_add_text(slimp3_tree, tvb, offset, 1, "Hello Request (Server --> Client)");
 376             }
 377         }
 378         break;
 379
 380     case SLIMP3_I2C:
 381         if (tree) {
 382             proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_i2c,
 383                                        tvb, offset, 1, FALSE);
 384             if (pinfo->destport == UDP_PORT_SLIMP3) {
 385                 /* Hello response; client->server */
 386                 proto_tree_add_text(slimp3_tree, tvb, offset, -1,
 387                                     "I2C Response (Client --> Server)");
 388             } else {
 389                 /* Hello request; server->client */
 390                 proto_tree_add_text(slimp3_tree, tvb, offset, -1,
 391                                     "I2C Request (Server --> Client)");
 392             }
 393         }
 394
 395         if (check_col(pinfo->cinfo, COL_INFO)) {
 396             if (pinfo->destport == UDP_PORT_SLIMP3) {
 397                 col_append_fstr(pinfo->cinfo, COL_INFO, ", Response");
 398             } else {
 399                 col_append_fstr(pinfo->cinfo, COL_INFO, ", Request");
 400             }
 401         }
 402         break;
 403
 404     case SLIMP3_DATA_REQ:
 405         if (tree) {
 406             proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_data_request,
 407                                        tvb, offset, 1, FALSE);
 408             proto_tree_add_text(slimp3_tree, tvb, offset+2, 2,
 409                                 "Requested offset: %d bytes.",
 410                                 tvb_get_ntohs(tvb, offset+2)*2);
 411         }
 412
 413         if (check_col(pinfo->cinfo, COL_INFO)) {
 414             col_append_fstr(pinfo->cinfo, COL_INFO, ", Offset: %d bytes",
 415                             tvb_get_ntohs(tvb, offset+2)*2);
 416         }
 417         break;
 418
 419     case SLIMP3_DATA:
 420         if (tree) {
 421             proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_data,
 422                                        tvb, offset, 1, FALSE);
 423             proto_tree_add_text(slimp3_tree, tvb, offset, -1,
 424                                 "Length: %d bytes", tvb_reported_length_remaining(tvb, offset+18));
 425             proto_tree_add_text(slimp3_tree, tvb, offset+2, 2,
 426                                 "Buffer offset: %d bytes.",
 427                                 tvb_get_ntohs(tvb, offset+2) * 2);
 428         }
 429
 430         if (check_col(pinfo->cinfo, COL_INFO)) {
 431             col_append_fstr(pinfo->cinfo, COL_INFO, ", Length: %d bytes, Offset: %d bytes.",
 432                             tvb_reported_length_remaining(tvb, offset+18),
 433                             tvb_get_ntohs(tvb, offset+2) * 2);
 434         }
 435         break;
 436
 437     case SLIMP3_DISC_REQ:
 438         if (tree) {
 439             guint8 fw_ver;
 440             proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_discover_request,
 441                                        tvb, offset, 1, FALSE);
 442             proto_tree_add_text(slimp3_tree, tvb, offset+1, 1,
 443                                 "Device ID: %d.", tvb_get_guint8(tvb, offset+1));
 444             fw_ver = tvb_get_guint8(tvb, offset+2);
 445             proto_tree_add_text(slimp3_tree, tvb, offset+2, 1, "Firmware Revision: %d.%d (0x%0x)",
 446                                 fw_ver>>4, fw_ver & 0xf, fw_ver);
 447         }
 448
 449         if (check_col(pinfo->cinfo, COL_INFO)) {
 450             guint8 fw_ver = tvb_get_guint8(tvb, offset+2);
 451             col_append_fstr(pinfo->cinfo, COL_INFO, ", Device ID: %d. Firmware: %d.%d",
 452                             tvb_get_guint8(tvb, offset+1), fw_ver>>4, fw_ver & 0xf);
 453         }
 454         break;
 455
 456     case SLIMP3_DISC_RSP:
 457         if (tree) {
 458             guint8 fw_ver;
 459             proto_tree_add_item_hidden(slimp3_tree, hf_slimp3_discover_response,
 460                                        tvb, offset, 1, FALSE);
 461             proto_tree_add_text(slimp3_tree, tvb, offset+2, 4,
 462                                 "Server Address: %s.",
 463                                 ip_to_str(tvb_get_ptr(tvb, offset+2, 4)));
 464             proto_tree_add_text(slimp3_tree, tvb, offset+6, 2,
 465                                 "Server Port: %d", tvb_get_ntohs(tvb, offset + 6));
 466         }
 467
 468         if (check_col(pinfo->cinfo, COL_INFO)) {
 469             guint8 fw_ver = tvb_get_guint8(tvb, offset+2);
 470             col_append_fstr(pinfo->cinfo, COL_INFO, ", Server Address: %s. Server Port: %d",
 471                             ip_to_str(tvb_get_ptr(tvb, offset+2, 4)),
 472                             tvb_get_ntohs(tvb, offset + 6));
 473         }
 474         break;
 475
 476     default:
 477         if (tree) {
 478             proto_tree_add_text(slimp3_tree, tvb, offset, -1,
 479                                 "Data (%d bytes)", tvb_reported_length_remaining(tvb, offset));
 480         }
 481         break;
 482
 483     }
 484 }
 485
 486 void
 487 proto_register_slimp3(void)
 488 {
 489   static hf_register_info hf[] = {
 490     { &hf_slimp3_opcode,
 491       { "Opcode",             "slimp3.opcode",
 492         FT_UINT8, BASE_DEC, VALS(slimp3_opcode_vals), 0x0,
 493         "SLIMP3 message type", HFILL }},
 494
 495     { &hf_slimp3_ir,
 496       { "Infrared",           "slimp3.ir",
 497         FT_UINT32, BASE_HEX, NULL, 0x0,
 498         "SLIMP3 Infrared command", HFILL }},
 499
 500     { &hf_slimp3_control,
 501       { "Control Packet",   "slimp3.control",
 502         FT_BOOLEAN, BASE_DEC, NULL, 0x0,
 503         "SLIMP3 control", HFILL }},
 504
 505     { &hf_slimp3_display,
 506       { "Display",                    "slimp3.display",
 507         FT_BOOLEAN, BASE_DEC, NULL, 0x0,
 508         "SLIMP3 display", HFILL }},
 509
 510     { &hf_slimp3_hello,
 511       { "Hello",                      "slimp3.hello",
 512         FT_BOOLEAN, BASE_DEC, NULL, 0x0,
 513         "SLIMP3 hello", HFILL }},
 514
 515     { &hf_slimp3_i2c,
 516       { "I2C",                "slimp3.i2c",
 517         FT_BOOLEAN, BASE_DEC, NULL, 0x0,
 518         "SLIMP3 I2C", HFILL }},
 519
 520     { &hf_slimp3_data,
 521       { "Data",              "slimp3.data",
 522         FT_BOOLEAN, BASE_DEC, NULL, 0x0,
 523         "SLIMP3 Data", HFILL }},
 524
 525     { &hf_slimp3_data_request,
 526       { "Data Request",      "slimp3.data_req",
 527         FT_BOOLEAN, BASE_DEC, NULL, 0x0,
 528         "SLIMP3 Data Request", HFILL }},
 529
 530     { &hf_slimp3_discover_request,
 531       { "Discovery Request", "slimp3.discovery_req",
 532         FT_BOOLEAN, BASE_DEC, NULL, 0x0,
 533         "SLIMP3 Discovery Request", HFILL }},
 534
 535     { &hf_slimp3_discover_response,
 536       { "Discovery Response", "slimp3.discovery_response",
 537         FT_BOOLEAN, BASE_DEC, NULL, 0x0,
 538         "SLIMP3 Discovery Response", HFILL }},
 539
 540   };
 541   static gint *ett[] = {
 542     &ett_slimp3,
 543   };
 544
 545   proto_slimp3 = proto_register_protocol("SliMP3 Communication Protocol",
 546                                        "SliMP3", "slimp3");
 547   proto_register_field_array(proto_slimp3, hf, array_length(hf));
 548   proto_register_subtree_array(ett, array_length(ett));
 549
 550   slimp3_handle = create_dissector_handle(dissect_slimp3, proto_slimp3);
 551 }
 552
 553 void
 554 proto_reg_handoff_slimp3(void)
 555 {
 556   dissector_add("udp.port", UDP_PORT_SLIMP3, slimp3_handle);
 557 }