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  * Wireshark - Network traffic analyzer
  10  * By Gerald Combs <gerald@wireshark.org>
  11  * Copyright 1998 Gerald Combs
  12  *
  13  * SPDX-License-Identifier: GPL-2.0-or-later
  14  */
  15
  16 #include "config.h"
  17
  18 #include <epan/packet.h>
  19 #include <epan/unit_strings.h>
  20
  21 #include <wsutil/array.h>
  22 #include <epan/to_str.h>
  23
  24 void proto_register_slimp3(void);
  25 void proto_reg_handoff_slimp3(void);
  26
  27 static dissector_handle_t slimp3_handle;
  28
  29 static int proto_slimp3;
  30 static int hf_slimp3_opcode;
  31 static int hf_slimp3_control;
  32 static int hf_slimp3_uptime;
  33 static int hf_slimp3_code_id;
  34 static int hf_slimp3_code_bits;
  35 static int hf_slimp3_infrared_slimp3;
  36 static int hf_slimp3_infrared_jvc;
  37 static int hf_slimp3_infrared;
  38 static int hf_slimp3_device_id;
  39 static int hf_slimp3_fw_rev;
  40 static int hf_slimp3_data_offset;
  41 static int hf_slimp3_data_command;
  42 static int hf_slimp3_data_write_pointer;
  43 static int hf_slimp3_data_sequence;
  44 static int hf_slimp3_disc_rsp_server_ip;
  45 static int hf_slimp3_disc_rsp_server_port;
  46 static int hf_slimp3_data_ack_write_pointer;
  47 static int hf_slimp3_data_ack_read_pointer;
  48 static int hf_slimp3_data_ack_sequence;
  49 static int hf_slimp3_data_req_offset;
  50 /* Generated from convert_proto_tree_add_text.pl */
  51 static int hf_slimp3_display_delay;
  52 static int hf_slimp3_display_string;
  53 static int hf_slimp3_display_command;
  54 static int hf_slimp3_display_unknown;
  55 static int hf_slimp3_hello_response_client_server;
  56 static int hf_slimp3_hello_request_server_client;
  57 static int hf_slimp3_i2c_response_client_server;
  58 static int hf_slimp3_i2c_request_server_client;
  59 static int hf_slimp3_data_length;
  60 static int hf_slimp3_data_data;
  61
  62 static int ett_slimp3;
  63
  64 #define UDP_PORT_SLIMP3_V1    1069 /* Not IANA registered */
  65 #define UDP_PORT_SLIMP3_V2    3483
  66 #define UDP_PORT_SLIMP3_RANGE "1069,3483"
  67
  68 #define SLIMP3_IR       'i'
  69 #define SLIMP3_CONTROL  's'
  70 #define SLIMP3_HELLO    'h'
  71 #define SLIMP3_DATA     'm'
  72 #define SLIMP3_DATA_REQ 'r'
  73 #define SLIMP3_DISPLAY  'l'
  74 #define SLIMP3_I2C      '2'
  75 #define SLIMP3_DISC_REQ 'd'
  76 #define SLIMP3_DISC_RSP 'D'
  77 #define SLIMP3_DATA_ACK 'a'
  78
  79 static const value_string slimp3_opcode_vals[] = {
  80     { SLIMP3_IR,       "Infrared Remote Code" },
  81     { SLIMP3_CONTROL,  "Stream Control" },
  82     { SLIMP3_DATA,     "MPEG Data" },
  83     { SLIMP3_DATA_REQ, "Data Request" },
  84     { SLIMP3_HELLO,    "Hello" },
  85     { SLIMP3_DISPLAY,  "Display" },
  86     { SLIMP3_I2C,      "I2C" },
  87     { SLIMP3_DISC_REQ, "Discovery Request" },
  88     { SLIMP3_DISC_RSP, "Discovery Response" },
  89     { SLIMP3_DATA_ACK, "Ack" },
  90     { 0,               NULL }
  91 };
  92
  93 /* IR remote control types */
  94 static const value_string slimp3_ir_types[] = {
  95     { 0x02, "SLIMP3" },
  96     { 0xff, "JVC DVD Player" },
  97
  98     { 0, NULL }
  99 };
 100
 101 /* IR codes for the custom SLIMP3 remote control */
 102 static const value_string slimp3_ir_codes_slimp3[] = {
 103     { 0x768900ff, "voldown" },
 104     { 0x768904fb, "brightness" },
 105     { 0x768908f7, "2" },
 106     { 0x768910ef, "play" },
 107     { 0x768920df, "pause" },
 108     { 0x768928d7, "6" },
 109     { 0x768938c7, "repeat" },
 110     { 0x768940bf, "power" },
 111     { 0x768948b7, "4" },
 112     { 0x768958a7, "search" },
 113     { 0x7689609f, "add" },
 114     { 0x76896897, "8" },
 115     { 0x76897887, "now_playing" },
 116     { 0x7689807f, "volup" },
 117     { 0x76898877, "3" },
 118     { 0x7689906f, "arrow_left" },
 119     { 0x76899867, "0" },
 120     { 0x7689a05f, "fwd" },
 121     { 0x7689a857, "7" },
 122     { 0x7689b04f, "arrow_down" },
 123     { 0x7689b847, "sleep" },
 124     { 0x7689c03f, "rew" },
 125     { 0x7689c837, "5" },
 126     { 0x7689d02f, "arrow_right" },
 127     { 0x7689d827, "shuffle" },
 128     { 0x7689e01f, "arrow_up" },
 129     { 0x7689e817, "9" },
 130     { 0x7689f00f, "1" },
 131     { 0x7689f807, "size" },
 132
 133     { 0,      NULL }
 134 };
 135 static value_string_ext slimp3_ir_codes_slimp3_ext = VALUE_STRING_EXT_INIT(slimp3_ir_codes_slimp3);
 136
 137 /* IR codes for the JVC remote control */
 138 static const value_string slimp3_ir_codes_jvc[] = {
 139     { 0xf786, "One" },
 140     { 0xf746, "Two" },
 141     { 0xf7c6, "Three" },
 142     { 0xf726, "Four" },
 143     { 0xf7a6, "Five" },
 144     { 0xf766, "Six" },
 145     { 0xf7e6, "Seven" },
 146     { 0xf716, "Eight" },
 147     { 0xf796, "Nine" },
 148     { 0xf776, "Ten" },
 149
 150     { 0xf7f6, "Picture-In-Picture" },
 151     /* { 0xf7XX, "Enter" }, */
 152     { 0xf70e, "Back" },
 153     { 0xf732, "Play" },
 154     { 0xf76e, "Forward" },
 155     { 0xf743, "Record" },
 156     { 0xf7c2, "Stop" },
 157     { 0xf7b2, "Pause" },
 158     /* { 0xf7XX, "TV/Video" }, */
 159     { 0xf703, "Display" },
 160     { 0xf7b3, "Sleep" },
 161     { 0xf7b6, "Guide" },
 162     { 0xf70b, "Up" },
 163     { 0xf74b, "Left" },
 164     { 0xf7cb, "Right" },
 165     { 0xf78b, "Down" },
 166     { 0xf783, "Menu" },
 167     { 0xf72b, "OK" },
 168     { 0xf778, "Volume Up" },
 169     { 0xf7f8, "Volume Down" },
 170     { 0xf70d, "Channel Up" },
 171     { 0xf78d, "Channel Down" },
 172     /* { 0xf7XX, "Mute" },  */
 173     { 0xf7ab, "Recall" },
 174     { 0xf702, "Power" },
 175
 176     { 0,      NULL }
 177 };
 178
 179
 180 static const value_string slimp3_display_commands[] = {
 181     {  0x1, "Clear Display"},
 182     {  0x2, "Cursor to 1st Line Home"},
 183
 184     {  0x4, "Mode: Decrement Address, Shift Cursor"},
 185     {  0x5, "Mode: Decrement Address, Shift Display"},
 186     {  0x6, "Mode: Increment Address, Shift Cursor"},
 187     {  0x7, "Mode: Increment Address, Shift Display"},
 188
 189     {  0x8, "Display Off"},
 190     {  0xd, "Display On, With Blinking"},
 191     {  0xe, "Display On, With Cursor"},
 192     {  0xf, "Display On, With Cursor And Blinking"},
 193
 194     { 0x10, "Move Cursor Left"},
 195     { 0x14, "Move Cursor Right"},
 196     { 0x18, "Shift Display Left"},
 197     { 0x1b, "Shift Display Right"},
 198
 199     { 0x30, "Set (8-bit)"},
 200     { 0x20, "Set (4-bit)"},
 201
 202     { 0xa0, "Cursor to Top Right"},
 203     { 0xc0, "Cursor to 2nd Line Home"},
 204
 205     {    0, NULL},
 206 };
 207
 208 static const value_string slimp3_display_fset8[] = {
 209     { 0x0, "Brightness 100%"},
 210     { 0x1, "Brightness 75%"},
 211     { 0x2, "Brightness 50%"},
 212     { 0x3, "Brightness 25%"},
 213
 214     {   0, NULL },
 215 };
 216
 217 static const value_string slimp3_stream_control[] = {
 218     { 1, "Reset buffer, Start New Stream"},
 219     { 2, "Pause Playback"},
 220     { 4, "Resume Playback"},
 221     { 0, NULL },
 222 };
 223
 224
 225 static const value_string slimp3_mpg_control[] = {
 226     { 0, "Go"},           /* Run the decoder */
 227     { 1, "Stop"},         /* Halt decoder but don't reset rptr */
 228     { 3, "Reset"},        /* Halt decoder and reset rptr */
 229
 230     { 0, NULL }
 231 };
 232
 233 #define MAX_LCD_STR_LEN 128
 234 static int
 235 dissect_slimp3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
 236 {
 237     const char *opcode_str;
 238     proto_tree *slimp3_tree;
 239     proto_item *ti;
 240     int         i1;
 241     int         offset = 0;
 242     uint16_t    opcode;
 243     unsigned char      lcd_char;
 244     char        lcd_str[MAX_LCD_STR_LEN + 1];
 245     bool        to_server    = false;
 246     bool        old_protocol = false;
 247     address     tmp_addr;
 248     bool        in_str;
 249     int         lcd_strlen;
 250
 251     /*
 252      * If it doesn't begin with a known opcode, reject it, so that
 253      * traffic that happens to be do or from one of our ports
 254      * doesn't get misidentified as SliMP3 traffic.
 255      */
 256     if (!tvb_bytes_exist(tvb, offset, 1))
 257         return 0;   /* not even an opcode */
 258     opcode = tvb_get_uint8(tvb, offset);
 259     opcode_str = try_val_to_str(opcode, slimp3_opcode_vals);
 260     if (opcode_str == NULL)
 261         return 0;
 262
 263     col_set_str(pinfo->cinfo, COL_PROTOCOL, "SliMP3");
 264     col_add_str(pinfo->cinfo, COL_INFO, opcode_str);
 265
 266     ti = proto_tree_add_item(tree, proto_slimp3, tvb, offset, -1, ENC_NA);
 267     slimp3_tree = proto_item_add_subtree(ti, ett_slimp3);
 268
 269     proto_tree_add_uint(slimp3_tree, hf_slimp3_opcode, tvb,
 270                         offset, 1, opcode);
 271
 272     /* The new protocol (v1.3 and later) uses an IANA-assigned port number.
 273      * It usually uses the same number for both sizes of the conversation, so
 274      * the port numbers can't always be used to determine client and server.
 275      * The new protocol places the clients MAC address in the packet, so that
 276      * is used to identify packets originating at the client.
 277      */
 278     if ((pinfo->destport == UDP_PORT_SLIMP3_V2) && (pinfo->srcport == UDP_PORT_SLIMP3_V2)) {
 279         set_address_tvb(&tmp_addr, AT_ETHER, 6, tvb, offset+12);
 280         to_server = addresses_equal(&tmp_addr, &pinfo->dl_src);
 281     }
 282     else if (pinfo->destport == UDP_PORT_SLIMP3_V2) {
 283         to_server = true;
 284     }
 285     else if (pinfo->srcport == UDP_PORT_SLIMP3_V2) {
 286         to_server = false;
 287     }
 288     if (pinfo->destport == UDP_PORT_SLIMP3_V1) {
 289         to_server = true;
 290         old_protocol = true;
 291     }
 292     else if (pinfo->srcport == UDP_PORT_SLIMP3_V1) {
 293         to_server = false;
 294         old_protocol = true;
 295     }
 296
 297     switch (opcode) {
 298
 299     case SLIMP3_IR:
 300         /* IR code
 301          *
 302          * [0]        'i' as in "IR"
 303          * [1]        0x00
 304          * [2..5]     player's time since startup in ticks @625 KHz
 305          * [6]        IR code id, ff=JVC, 02=SLIMP3
 306          * [7]        number of meaningful bits - 16 for JVC, 32 for SLIMP3
 307          * [8..11]    the 32-bit IR code
 308          * [12..17]   reserved
 309          */
 310         if (tree) {
 311             i1 = tvb_get_ntohl(tvb, offset+2);
 312             proto_tree_add_uint_format_value(slimp3_tree, hf_slimp3_uptime, tvb, offset+2, 4, i1,
 313                                              "%u sec (%u ticks)", i1/625000, i1);
 314
 315             proto_tree_add_item(slimp3_tree, hf_slimp3_code_id, tvb, offset+6, 1, ENC_BIG_ENDIAN);
 316             proto_tree_add_item(slimp3_tree, hf_slimp3_code_bits, tvb, offset+7, 1, ENC_BIG_ENDIAN);
 317
 318             i1 = tvb_get_ntohl(tvb, offset+8);
 319             /* Check the code to figure out which remote is being used. */
 320             if (tvb_get_uint8(tvb, offset+6) == 0x02 &&
 321                 tvb_get_uint8(tvb, offset+7) == 32) {
 322                 /* This is the custom SLIMP3 remote. */
 323                 proto_tree_add_item(slimp3_tree, hf_slimp3_infrared_slimp3, tvb, offset+8, 4, ENC_BIG_ENDIAN);
 324                 col_append_fstr(pinfo->cinfo, COL_INFO, ", SLIMP3: %s",
 325                                 val_to_str_ext(i1, &slimp3_ir_codes_slimp3_ext, "Unknown (0x%0x)"));
 326             }
 327             else if (tvb_get_uint8(tvb, offset+6) == 0xff &&
 328                      tvb_get_uint8(tvb, offset+7) == 16) {
 329                 /* This is a JVC DVD player remote */
 330                 proto_tree_add_item(slimp3_tree, hf_slimp3_infrared_jvc, tvb, offset+8, 4, ENC_BIG_ENDIAN);
 331                 col_append_fstr(pinfo->cinfo, COL_INFO, ", JVC: %s",
 332                                 val_to_str(i1, slimp3_ir_codes_jvc, "Unknown (0x%0x)"));
 333             } else {
 334                 /* Unknown code; just write it */
 335                 proto_tree_add_item(slimp3_tree, hf_slimp3_infrared, tvb, offset+8, 4, ENC_BIG_ENDIAN);
 336                 col_append_fstr(pinfo->cinfo, COL_INFO, ", 0x%0x", i1);
 337             }
 338         }
 339         break;
 340
 341     case SLIMP3_DISPLAY:
 342         if (tree) {
 343             uint8_t value;
 344
 345             /* Loop through the commands */
 346             i1 = 18;
 347             in_str = false;
 348             lcd_strlen = 0;
 349             while (i1 < tvb_reported_length_remaining(tvb, offset)) {
 350                 switch(tvb_get_uint8(tvb, offset + i1)) {
 351                 case 0:
 352                     in_str = false;
 353                     lcd_strlen = 0;
 354                     proto_tree_add_item(slimp3_tree, hf_slimp3_display_delay, tvb, offset + i1, 2, ENC_NA);
 355                     i1 += 2;
 356                     break;
 357                 case 3:
 358                     lcd_char = tvb_get_uint8(tvb, offset + i1 + 1);
 359                     if (!g_ascii_isprint(lcd_char))
 360                         lcd_char = '.';
 361                     if (ti && in_str) {
 362                         lcd_strlen += 2;
 363                         proto_item_append_text(ti, "%c", lcd_char);
 364                         proto_item_set_len(ti, lcd_strlen);
 365                     } else {
 366                         ti = proto_tree_add_uint_format_value(slimp3_tree, hf_slimp3_display_string, tvb, offset + i1, 2,
 367                                                  lcd_char, "%c", lcd_char);
 368                         in_str = true;
 369                         lcd_strlen = 2;
 370                     }
 371                     i1 += 2;
 372                     break;
 373
 374                 case 2:
 375                     in_str = false;
 376                     lcd_strlen = 0;
 377                     value = tvb_get_uint8(tvb, offset + i1 + 1);
 378                     ti = proto_tree_add_uint(slimp3_tree, hf_slimp3_display_command, tvb, offset + i1, 2, value);
 379                     if ((tvb_get_uint8(tvb, offset + i1 + 1) & 0xf0) == 0x30) {
 380                         proto_item_append_text(ti, ": %s",
 381                                                val_to_str(tvb_get_uint8(tvb, offset + i1 + 2),
 382                                                           slimp3_display_fset8,
 383                                                           "Unknown (0x%0x)"));
 384                         i1 += 2;
 385                     }
 386                     i1 += 2;
 387                     break;
 388
 389                 default:
 390                     proto_tree_add_item(slimp3_tree, hf_slimp3_display_unknown, tvb, offset + i1, 2, ENC_NA);
 391                     i1 += 2;
 392                     break;
 393                 }
 394             }
 395         }
 396
 397         i1 = 18;
 398         lcd_strlen = 0;
 399         while (tvb_offset_exists(tvb, offset + i1) &&
 400                lcd_strlen < MAX_LCD_STR_LEN) {
 401             switch (tvb_get_uint8(tvb, offset + i1)) {
 402
 403             case 0:
 404                 lcd_str[lcd_strlen++] = '.';
 405                 break;
 406
 407             case 2:
 408                 lcd_str[lcd_strlen++] = '|';
 409                 if (tvb_offset_exists(tvb, offset + i1 + 1) &&
 410                     (tvb_get_uint8(tvb, offset + i1 + 1) & 0xf0) == 0x30)
 411                     i1 += 2;
 412                 break;
 413
 414             case 3:
 415                 if (tvb_offset_exists(tvb, offset + i1 + 1)) {
 416                     if ((lcd_strlen < 1) ||
 417                         (lcd_str[lcd_strlen-1] != ' ') ||
 418                         (tvb_get_uint8(tvb, offset + i1 + 1) != ' ')) {
 419                         lcd_char = tvb_get_uint8(tvb, offset + i1 + 1);
 420                         lcd_str[lcd_strlen++] = g_ascii_isprint(lcd_char) ? lcd_char : '.';
 421                     }
 422                 }
 423             }
 424
 425             i1 += 2;
 426         }
 427         lcd_str[lcd_strlen] = '\0';
 428         if (lcd_strlen > 0)
 429             col_append_fstr(pinfo->cinfo, COL_INFO, ", %s", lcd_str);
 430         break;
 431
 432     case SLIMP3_CONTROL:
 433         proto_tree_add_item(slimp3_tree, hf_slimp3_control, tvb, offset+1, 1, ENC_BIG_ENDIAN);
 434         col_append_fstr(pinfo->cinfo, COL_INFO, ", %s",
 435                         val_to_str(tvb_get_uint8(tvb, offset+1),
 436                                    slimp3_stream_control, "Unknown (0x%0x)"));
 437         break;
 438
 439     case SLIMP3_HELLO:
 440         if (tree) {
 441             if (to_server) {
 442                 uint8_t fw_ver;
 443                 /* Hello response; client->server */
 444                 proto_tree_add_item(slimp3_tree, hf_slimp3_hello_response_client_server, tvb, offset, 1, ENC_NA);
 445                 proto_tree_add_item(slimp3_tree, hf_slimp3_device_id, tvb, offset+1, 1, ENC_BIG_ENDIAN);
 446                 fw_ver = tvb_get_uint8(tvb, offset+2);
 447                 proto_tree_add_uint_format_value(slimp3_tree, hf_slimp3_fw_rev, tvb, offset+2, 1, fw_ver,
 448                                                  "%u.%u (0x%0x)", fw_ver>>4, fw_ver & 0xf, fw_ver);
 449             } else {
 450                 /* Hello request; server->client */
 451                 proto_tree_add_item(slimp3_tree, hf_slimp3_hello_request_server_client, tvb, offset, 1, ENC_NA);
 452             }
 453         }
 454         break;
 455
 456     case SLIMP3_I2C:
 457         if (to_server) {
 458             /* Hello response; client->server */
 459             proto_tree_add_item(slimp3_tree, hf_slimp3_i2c_response_client_server, tvb, offset, -1, ENC_NA);
 460             col_append_str(pinfo->cinfo, COL_INFO, ", Response");
 461         } else {
 462             /* Hello request; server->client */
 463             proto_tree_add_item(slimp3_tree, hf_slimp3_i2c_request_server_client, tvb, offset, -1, ENC_NA);
 464             col_append_str(pinfo->cinfo, COL_INFO, ", Request");
 465         }
 466         break;
 467
 468     case SLIMP3_DATA_REQ:
 469         proto_tree_add_item(slimp3_tree, hf_slimp3_data_req_offset, tvb, offset+2, 2, ENC_BIG_ENDIAN);
 470         col_append_fstr(pinfo->cinfo, COL_INFO, ", Offset: %u bytes",
 471                         tvb_get_ntohs(tvb, offset+2)*2);
 472         break;
 473
 474     case SLIMP3_DATA:
 475         /* MPEG data (v1.3 and later)
 476          *
 477          *  [0]       'm'
 478          *  [1..5]    reserved
 479          *  [6..7]    Write pointer (in words)
 480          *  [8..9]    reserved
 481          *  [10..11]  Sequence number
 482          *  [12..17]  reserved
 483          *  [18..]    MPEG data
 484          */
 485         if (old_protocol) {
 486             unsigned offset_buffer;
 487             proto_tree_add_bytes_format(slimp3_tree, hf_slimp3_data_length, tvb, offset, -1,
 488                                 NULL, "Length: %d bytes",
 489                                 tvb_reported_length_remaining(tvb, offset+18));
 490             offset_buffer = tvb_get_ntohs(tvb, offset+2) * 2;
 491             proto_tree_add_uint(slimp3_tree, hf_slimp3_data_offset, tvb, offset+2, 2, offset_buffer);
 492
 493             col_append_fstr(pinfo->cinfo, COL_INFO,
 494                             ", Length: %d bytes, Offset: %u bytes.",
 495                             tvb_reported_length_remaining(tvb, offset+18),
 496                             offset_buffer);
 497         }
 498         else {
 499             unsigned write_pointer;
 500             proto_tree_add_item(slimp3_tree, hf_slimp3_data_command, tvb, offset+1, 1, ENC_BIG_ENDIAN);
 501             proto_tree_add_bytes_format(slimp3_tree, hf_slimp3_data_length, tvb, offset, -1,
 502                                 NULL, "Length: %d bytes",
 503                                 tvb_reported_length_remaining(tvb, offset+18));
 504             write_pointer = tvb_get_ntohs(tvb, offset+6) * 2;
 505             proto_tree_add_uint(slimp3_tree, hf_slimp3_data_write_pointer, tvb, offset+6, 2, write_pointer);
 506             proto_tree_add_item(slimp3_tree, hf_slimp3_data_sequence, tvb, offset+10, 2, ENC_BIG_ENDIAN);
 507
 508             col_append_fstr(pinfo->cinfo, COL_INFO,
 509                             ", %s, %d bytes at %u, Sequence: %u",
 510                             val_to_str(tvb_get_uint8(tvb, offset+1),
 511                                        slimp3_mpg_control, "Unknown (0x%0x)"),
 512                             tvb_reported_length_remaining(tvb, offset+18),
 513                             write_pointer,
 514                             tvb_get_ntohs(tvb, offset+10));
 515         }
 516         break;
 517
 518     case SLIMP3_DISC_REQ:
 519     {
 520         uint8_t fw_ver;
 521         proto_tree_add_item(slimp3_tree, hf_slimp3_device_id, tvb, offset+1, 1, ENC_BIG_ENDIAN);
 522         fw_ver = tvb_get_uint8(tvb, offset+2);
 523         proto_tree_add_uint_format_value(slimp3_tree, hf_slimp3_fw_rev, tvb, offset+2, 1, fw_ver,
 524                                          "%u.%u (0x%0x)", fw_ver>>4, fw_ver & 0xf, fw_ver);
 525         col_append_fstr(pinfo->cinfo, COL_INFO, ", Device ID: %u. Firmware: %u.%u",
 526                         tvb_get_uint8(tvb, offset+1), fw_ver>>4, fw_ver & 0xf);
 527     }
 528     break;
 529
 530     case SLIMP3_DISC_RSP:
 531         if (tree) {
 532             proto_tree_add_item(slimp3_tree, hf_slimp3_disc_rsp_server_ip, tvb, offset+2, 4, ENC_BIG_ENDIAN);
 533             proto_tree_add_item(slimp3_tree, hf_slimp3_disc_rsp_server_port, tvb, offset+6, 2, ENC_BIG_ENDIAN);
 534         }
 535
 536         col_append_fstr(pinfo->cinfo, COL_INFO, ", Server Address: %s. Server Port: %u",
 537                         tvb_ip_to_str(pinfo->pool, tvb, offset+2),
 538                         tvb_get_ntohs(tvb, offset + 6));
 539         break;
 540
 541     case SLIMP3_DATA_ACK:
 542         /* Acknowledge MPEG data
 543          *
 544          *  [0]       'a'
 545          *  [1..5]
 546          *  [6..7]    Write pointer (in words)
 547          *  [8..9]    Read pointer (in words)
 548          *  [10..11]  Sequence number
 549          *  [12..17]  client MAC address (v1.3 and later)
 550          */
 551         if (tree) {
 552             unsigned pointer;
 553
 554             pointer = tvb_get_ntohs(tvb, offset+6) * 2;
 555             proto_tree_add_uint(slimp3_tree, hf_slimp3_data_ack_write_pointer, tvb, offset+6, 2, pointer);
 556             pointer = tvb_get_ntohs(tvb, offset+8) * 2;
 557             proto_tree_add_uint(slimp3_tree, hf_slimp3_data_ack_read_pointer, tvb, offset+8, 2, pointer);
 558             proto_tree_add_item(slimp3_tree, hf_slimp3_data_ack_sequence, tvb, offset+10, 2, ENC_BIG_ENDIAN);
 559         }
 560
 561         col_append_fstr(pinfo->cinfo, COL_INFO, ", Sequence: %u",
 562                         tvb_get_ntohs(tvb, offset+10));
 563         break;
 564
 565     default:
 566         if (tree) {
 567             proto_tree_add_item(slimp3_tree, hf_slimp3_data_data, tvb, offset, -1, ENC_NA);
 568         }
 569         break;
 570     }
 571
 572     return tvb_reported_length(tvb);
 573 }
 574
 575 void
 576 proto_register_slimp3(void)
 577 {
 578     static hf_register_info hf[] = {
 579         { &hf_slimp3_opcode,
 580           { "Opcode", "slimp3.opcode",
 581             FT_UINT8, BASE_DEC, VALS(slimp3_opcode_vals), 0x0,
 582             "SLIMP3 message type", HFILL }},
 583
 584         { &hf_slimp3_control,
 585           { "Control Packet", "slimp3.control",
 586             FT_UINT8, BASE_DEC, VALS(slimp3_stream_control), 0x0,
 587             "SLIMP3 control", HFILL }},
 588
 589         { &hf_slimp3_uptime,
 590           { "Uptime", "slimp3.uptime",
 591             FT_UINT32, BASE_DEC, NULL, 0x0,
 592             NULL, HFILL }},
 593
 594         { &hf_slimp3_code_id,
 595           { "Code identifier", "slimp3.code_id",
 596             FT_UINT8, BASE_DEC, VALS(slimp3_ir_types), 0x0,
 597             NULL, HFILL }},
 598
 599         { &hf_slimp3_code_bits,
 600           { "Code bits", "slimp3.code_bits",
 601             FT_UINT8, BASE_DEC, NULL, 0x0,
 602             NULL, HFILL }},
 603
 604         { &hf_slimp3_infrared_slimp3,
 605           { "Infrared Code", "slimp3.infrared",
 606             FT_UINT32, BASE_HEX | BASE_EXT_STRING, &slimp3_ir_codes_slimp3_ext, 0x0,
 607             NULL, HFILL }},
 608
 609         { &hf_slimp3_infrared_jvc,
 610           { "Infrared Code", "slimp3.infrared",
 611             FT_UINT32, BASE_HEX, VALS(slimp3_ir_codes_jvc), 0x0,
 612             NULL, HFILL }},
 613
 614         { &hf_slimp3_infrared,
 615           { "Infrared Code", "slimp3.infrared",
 616             FT_UINT32, BASE_HEX, NULL, 0x0,
 617             NULL, HFILL }},
 618
 619         { &hf_slimp3_device_id,
 620           { "Device ID", "slimp3.device_id",
 621             FT_UINT8, BASE_DEC, NULL, 0x0,
 622             NULL, HFILL }},
 623
 624         { &hf_slimp3_fw_rev,
 625           { "Firmware Revision", "slimp3.fw_rev",
 626             FT_UINT8, BASE_HEX, NULL, 0x0,
 627             NULL, HFILL }},
 628
 629         { &hf_slimp3_data_offset,
 630           { "Buffer offset", "slimp3.data.offset",
 631             FT_UINT16, BASE_DEC, NULL, 0x0,
 632             NULL, HFILL }},
 633
 634         { &hf_slimp3_data_command,
 635           { "Command", "slimp3.data.command",
 636             FT_UINT8, BASE_HEX, VALS(slimp3_mpg_control), 0x0,
 637             NULL, HFILL }},
 638
 639         { &hf_slimp3_data_write_pointer,
 640           { "Write Pointer", "slimp3.data.write_pointer",
 641             FT_UINT16, BASE_DEC, NULL, 0x0,
 642             NULL, HFILL }},
 643
 644         { &hf_slimp3_data_sequence,
 645           { "Sequence", "slimp3.data.sequence",
 646             FT_UINT16, BASE_DEC, NULL, 0x0,
 647             NULL, HFILL }},
 648
 649         { &hf_slimp3_disc_rsp_server_ip,
 650           { "Server Address", "slimp3.disc_rsp.server_ip",
 651             FT_IPv4, BASE_NONE, NULL, 0x0,
 652             NULL, HFILL }},
 653
 654         { &hf_slimp3_disc_rsp_server_port,
 655           { "Server Port", "slimp3.disc_rsp.server_port",
 656             FT_UINT16, BASE_DEC, NULL, 0x0,
 657             NULL, HFILL }},
 658
 659         { &hf_slimp3_data_ack_write_pointer,
 660           { "Write Pointer", "slimp3.data_ack.write_pointer",
 661             FT_UINT16, BASE_DEC, NULL, 0x0,
 662             NULL, HFILL }},
 663
 664         { &hf_slimp3_data_ack_read_pointer,
 665           { "Read Pointer", "slimp3.data_ack.read_pointer",
 666             FT_UINT16, BASE_DEC, NULL, 0x0,
 667             NULL, HFILL }},
 668
 669         { &hf_slimp3_data_ack_sequence,
 670           { "Sequence", "slimp3.data_ack.sequence",
 671             FT_UINT16, BASE_DEC, NULL, 0x0,
 672             NULL, HFILL }},
 673
 674         { &hf_slimp3_data_req_offset,
 675           { "Requested offset", "slimp3.data_req.offset",
 676             FT_UINT16, BASE_DEC, NULL, 0x0,
 677             NULL, HFILL }},
 678
 679         /* Generated from convert_proto_tree_add_text.pl */
 680         { &hf_slimp3_display_delay, { "Delay", "slimp3.display_delay", FT_UINT16, BASE_DEC|BASE_UNIT_STRING, UNS(&units_milliseconds), 0x0, NULL, HFILL }},
 681         { &hf_slimp3_display_string, { "String", "slimp3.display_string", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
 682         { &hf_slimp3_display_command, { "Command", "slimp3.display_command", FT_UINT8, BASE_DEC, VALS(slimp3_display_commands), 0x0, NULL, HFILL }},
 683         { &hf_slimp3_display_unknown, { "Unknown", "slimp3.display_unknown", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
 684         { &hf_slimp3_hello_response_client_server, { "Hello Response (Client --> Server)", "slimp3.hello_response_client_server", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
 685         { &hf_slimp3_hello_request_server_client, { "Hello Request (Server --> Client)", "slimp3.hello_request_server_client", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
 686         { &hf_slimp3_i2c_response_client_server, { "I2C Response (Client --> Server)", "slimp3.i2c_response_client_server", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
 687         { &hf_slimp3_i2c_request_server_client, { "I2C Request (Server --> Client)", "slimp3.i2c_request_server_client", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
 688         { &hf_slimp3_data_length, { "Length", "slimp3.data.length", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
 689         { &hf_slimp3_data_data, { "Data", "slimp3.data.data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
 690     };
 691
 692     static int *ett[] = {
 693         &ett_slimp3,
 694     };
 695
 696     proto_slimp3 = proto_register_protocol("SliMP3 Communication Protocol", "SliMP3", "slimp3");
 697     proto_register_field_array(proto_slimp3, hf, array_length(hf));
 698     proto_register_subtree_array(ett, array_length(ett));
 699
 700     slimp3_handle = register_dissector("slimp3", dissect_slimp3, proto_slimp3);
 701 }
 702
 703 void
 704 proto_reg_handoff_slimp3(void)
 705 {
 706     dissector_add_uint_range_with_preference("udp.port", UDP_PORT_SLIMP3_RANGE, slimp3_handle);
 707 }
 708
 709 /*
 710  * Editor modelines
 711  *
 712  * Local Variables:
 713  * c-basic-offset: 4
 714  * tab-width: 8
 715  * indent-tabs-mode: nil
 716  * End:
 717  *
 718  * ex: set shiftwidth=4 tabstop=8 expandtab:
 719  * :indentSize=4:tabSize=8:noTabs=true:
 720  */