epan/dissectors/packet-vrt.c

   1 /* packet-vrt.c
   2  * Routines for VRT (VITA 49) packet disassembly
   3  * Copyright 2012 Ettus Research LLC - Nick Foster <nick@ettus.com>: original dissector
   4  * Copyright 2013 Alexander Chemeris <alexander.chemeris@gmail.com>: dissector improvement
   5  * Copyright 2013 Dario Lombardo (lomato@gmail.com): Official Wireshark port
   6  *
   7  * Original dissector repository: https://github.com/bistromath/vrt-dissector
   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
  31 #include "config.h"
  32 #include <epan/packet.h>
  33 #include <epan/prefs.h>
  34
  35 static gint dissector_port_pref = 4991;
  36
  37 static int proto_vrt = -1;
  38
  39 /* fields */
  40 static int hf_vrt_header = -1; /* 32-bit header */
  41 static int hf_vrt_type = -1; /* 4-bit pkt type */
  42 static int hf_vrt_cidflag = -1; /* 1-bit class ID flag */
  43 static int hf_vrt_tflag = -1; /* 1-bit trailer flag */
  44 static int hf_vrt_tsmflag = -1; /* 1-bit timestamp mode */
  45 static int hf_vrt_tsi = -1; /* 2-bit timestamp type */
  46 static int hf_vrt_tsf = -1; /* 2-bit fractional timestamp type */
  47 static int hf_vrt_seq = -1; /* 4-bit sequence number */
  48 static int hf_vrt_len = -1; /* 16-bit length */
  49 static int hf_vrt_sid = -1; /* 32-bit stream ID (opt.) */
  50 static int hf_vrt_cid = -1; /* 64-bit class ID (opt.) */
  51 static int hf_vrt_cid_oui = -1; /* 24-bit class ID OUI */
  52 static int hf_vrt_cid_icc = -1; /* 16-bit class ID ICC */
  53 static int hf_vrt_cid_pcc = -1; /* 16-bit class ID PCC */
  54 static int hf_vrt_ts_int = -1; /* 32-bit integer timestamp (opt.) */
  55 static int hf_vrt_ts_frac_picosecond = -1; /* 64-bit fractional timestamp (opt.) */
  56 static int hf_vrt_ts_frac_sample = -1; /* 64-bit fractional timestamp (opt.) */
  57 static int hf_vrt_data = -1; /* data */
  58 static int hf_vrt_trailer = -1; /* 32-bit trailer (opt.) */
  59 static int hf_vrt_trailer_enables = -1; /* trailer indicator enables */
  60 static int hf_vrt_trailer_ind = -1; /* trailer indicators */
  61 static int hf_vrt_trailer_e = -1; /* ass con pac cnt enable */
  62 static int hf_vrt_trailer_acpc = -1; /* associated context packet count */
  63 static int hf_vrt_trailer_en_caltime = -1; /* calibrated time indicator */
  64 static int hf_vrt_trailer_en_valid = -1; /* valid data ind */
  65 static int hf_vrt_trailer_en_reflock = -1; /* reference locked ind */
  66 static int hf_vrt_trailer_en_agc = -1; /* AGC/MGC enabled ind */
  67 static int hf_vrt_trailer_en_sig = -1; /* signal detected ind */
  68 static int hf_vrt_trailer_en_inv = -1; /* spectral inversion ind */
  69 static int hf_vrt_trailer_en_overrng = -1; /* overrange indicator */
  70 static int hf_vrt_trailer_en_sampleloss = -1; /* sample loss indicator */
  71 static int hf_vrt_trailer_en_user0 = -1; /* User indicator 0 */
  72 static int hf_vrt_trailer_en_user1 = -1; /* User indicator 1 */
  73 static int hf_vrt_trailer_en_user2 = -1; /* User indicator 2 */
  74 static int hf_vrt_trailer_en_user3 = -1; /* User indicator 3 */
  75 static int hf_vrt_trailer_ind_caltime = -1; /* calibrated time indicator */
  76 static int hf_vrt_trailer_ind_valid = -1; /* valid data ind */
  77 static int hf_vrt_trailer_ind_reflock = -1; /* reference locked ind */
  78 static int hf_vrt_trailer_ind_agc = -1; /* AGC/MGC enabled ind */
  79 static int hf_vrt_trailer_ind_sig = -1; /* signal detected ind */
  80 static int hf_vrt_trailer_ind_inv = -1; /* spectral inversion ind */
  81 static int hf_vrt_trailer_ind_overrng = -1; /* overrange indicator */
  82 static int hf_vrt_trailer_ind_sampleloss = -1; /* sample loss indicator */
  83 static int hf_vrt_trailer_ind_user0 = -1; /* User indicator 0 */
  84 static int hf_vrt_trailer_ind_user1 = -1; /* User indicator 1 */
  85 static int hf_vrt_trailer_ind_user2 = -1; /* User indicator 2 */
  86 static int hf_vrt_trailer_ind_user3 = -1; /* User indicator 3 */
  87
  88 /* subtree state variables */
  89 static gint ett_vrt = -1;
  90 static gint ett_header = -1;
  91 static gint ett_trailer = -1;
  92 static gint ett_indicators = -1;
  93 static gint ett_ind_enables = -1;
  94 static gint ett_cid = -1;
  95
  96 static const value_string packet_types[] = {
  97     {0x00, "IF data packet without stream ID"},
  98     {0x01, "IF data packet with stream ID"},
  99     {0x02, "Extension data packet without stream ID"},
 100     {0x03, "Extension data packet with stream ID"},
 101     {0x04, "IF context packet"},
 102     {0x05, "Extension context packet"},
 103     {0, NULL}
 104 };
 105
 106 static const value_string tsi_types[] = {
 107     {0x00, "No integer-seconds timestamp field included"},
 108     {0x01, "Coordinated Universal Time (UTC)"},
 109     {0x02, "GPS time"},
 110     {0x03, "Other"},
 111     {0, NULL}
 112 };
 113
 114 static const value_string tsf_types[] = {
 115     {0x00, "No fractional-seconds timestamp field included"},
 116     {0x01, "Sample count timestamp"},
 117     {0x02, "Real time (picoseconds) timestamp"},
 118     {0x03, "Free running count timestamp"},
 119     {0, NULL}
 120 };
 121
 122 static const value_string tsm_types[] = {
 123     {0x00, "Precise timestamp resolution"},
 124     {0x01, "General timestamp resolution"},
 125     {0, NULL}
 126 };
 127
 128 static const int *enable_hfs[] = {
 129     &hf_vrt_trailer_en_user3,
 130     &hf_vrt_trailer_en_user2,
 131     &hf_vrt_trailer_en_user1,
 132     &hf_vrt_trailer_en_user0,
 133     &hf_vrt_trailer_en_sampleloss,
 134     &hf_vrt_trailer_en_overrng,
 135     &hf_vrt_trailer_en_inv,
 136     &hf_vrt_trailer_en_sig,
 137     &hf_vrt_trailer_en_agc,
 138     &hf_vrt_trailer_en_reflock,
 139     &hf_vrt_trailer_en_valid,
 140     &hf_vrt_trailer_en_caltime
 141 };
 142
 143 static const int *ind_hfs[] = {
 144     &hf_vrt_trailer_ind_user3,
 145     &hf_vrt_trailer_ind_user2,
 146     &hf_vrt_trailer_ind_user1,
 147     &hf_vrt_trailer_ind_user0,
 148     &hf_vrt_trailer_ind_sampleloss,
 149     &hf_vrt_trailer_ind_overrng,
 150     &hf_vrt_trailer_ind_inv,
 151     &hf_vrt_trailer_ind_sig,
 152     &hf_vrt_trailer_ind_agc,
 153     &hf_vrt_trailer_ind_reflock,
 154     &hf_vrt_trailer_ind_valid,
 155     &hf_vrt_trailer_ind_caltime
 156 };
 157
 158 void dissect_header(tvbuff_t *tvb, proto_tree *tree, int type, int offset);
 159 void dissect_trailer(tvbuff_t *tvb, proto_tree *tree, int offset);
 160 void dissect_cid(tvbuff_t *tvb, proto_tree *tree, int offset);
 161 void proto_reg_handoff_vrt(void);
 162
 163 static void dissect_vrt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 164 {
 165     int offset = 0;
 166     guint8 type;
 167     guint8 sidflag;
 168     guint8 cidflag;
 169     guint8 tflag;
 170     guint8 tsiflag;
 171     guint8 tsfflag;
 172     guint16 len;
 173     gint16 nsamps;
 174
 175     proto_tree *vrt_tree;
 176     proto_item *ti;
 177
 178     col_set_str(pinfo->cinfo, COL_PROTOCOL, "VITA 49");
 179     col_clear(pinfo->cinfo,COL_INFO);
 180
 181     /* HACK to support UHD's weird header offset on data packets. */
 182     if (tvb_get_guint8(tvb, 0) == 0) offset += 4;
 183
 184     /* get packet type */
 185     type = tvb_get_guint8(tvb, offset) >> 4;
 186     col_add_str(pinfo->cinfo, COL_INFO, val_to_str(type, packet_types, "Reserved packet type (0x%02x)"));
 187
 188     /* get SID, CID, T, TSI, and TSF flags */
 189     sidflag = (type & 1) || (type == 4);
 190     cidflag = (tvb_get_guint8(tvb, offset) >> 3) & 0x01;
 191     /* tflag is in data packets but not context packets */
 192     tflag =   (tvb_get_guint8(tvb, offset) >> 2) & 0x01;
 193     if(type == 4) tflag = 0; /* this should be unnecessary but we do it
 194                                 just in case */
 195     /* tsmflag is in context packets but not data packets
 196        tsmflag = (tvb_get_guint8(tvb, offset) >> 0) & 0x01; */
 197     tsiflag = (tvb_get_guint8(tvb, offset+1) >> 6) & 0x03;
 198     tsfflag = (tvb_get_guint8(tvb, offset+1) >> 4) & 0x03;
 199     len = tvb_get_ntohs(tvb, offset+2);
 200     nsamps = len - 1 - sidflag - cidflag*2 - tsiflag - tsfflag*2 - tflag;
 201
 202     if (tree) { /* we're being asked for details */
 203         ti = proto_tree_add_item(tree, proto_vrt, tvb, offset, -1, ENC_NA);
 204         vrt_tree = proto_item_add_subtree(ti, ett_vrt);
 205
 206         dissect_header(tvb, vrt_tree, type, offset);
 207         offset += 4;
 208
 209         /* header's done! if SID (last bit of type), put the stream ID here */
 210         if(sidflag) {
 211             proto_tree_add_item(vrt_tree, hf_vrt_sid, tvb, offset, 4, ENC_BIG_ENDIAN);
 212             offset += 4;
 213         }
 214
 215         /* if there's a class ID (cidflag), put the class ID here */
 216         if(cidflag) {
 217             dissect_cid(tvb, vrt_tree, offset);
 218             offset += 8;
 219         }
 220
 221         /* if TSI and/or TSF, populate those here */
 222         if(tsiflag != 0) {
 223             proto_tree_add_item(vrt_tree, hf_vrt_ts_int, tvb, offset, 4, ENC_BIG_ENDIAN);
 224             offset += 4;
 225         }
 226         if(tsfflag != 0) {
 227             if(tsfflag == 1 || tsfflag == 3) {
 228                 proto_tree_add_item(vrt_tree, hf_vrt_ts_frac_sample, tvb, offset, 8, ENC_BIG_ENDIAN);
 229             } else if(tsfflag == 2) {
 230                 proto_tree_add_item(vrt_tree, hf_vrt_ts_frac_picosecond, tvb, offset, 8, ENC_BIG_ENDIAN);
 231             }
 232             offset += 8;
 233         }
 234
 235         /* now we've got either a context packet or a data packet
 236            TODO: parse context packet fully instead of just spewing data */
 237
 238         /* we're into the data */
 239         if(nsamps > 0)
 240         {
 241             proto_tree_add_item(vrt_tree, hf_vrt_data, tvb, offset, nsamps*4, ENC_NA);
 242         }
 243
 244         offset += nsamps*4;
 245
 246         if(tflag) {
 247             dissect_trailer(tvb, vrt_tree, offset);
 248         }
 249
 250
 251     } else { /* we're being asked for a summary */
 252
 253     }
 254 }
 255
 256 void dissect_header(tvbuff_t *tvb, proto_tree *tree, int type, int _offset)
 257 {
 258     int offset;
 259     proto_item *hdr_item;
 260     proto_tree *hdr_tree;
 261
 262     offset = _offset;
 263
 264     hdr_item = proto_tree_add_item(tree, hf_vrt_header, tvb, offset, 4, ENC_BIG_ENDIAN);
 265
 266     hdr_tree = proto_item_add_subtree(hdr_item, ett_header);
 267     proto_tree_add_item(hdr_tree, hf_vrt_type, tvb, offset, 1, ENC_NA);
 268     proto_tree_add_bits_item(hdr_tree, hf_vrt_cidflag, tvb, (offset * 8) + 5, 1, ENC_NA);
 269     if(type == 4) {
 270         proto_tree_add_item(hdr_tree, hf_vrt_tsmflag, tvb, offset, 1, ENC_NA);
 271     } else {
 272         proto_tree_add_bits_item(hdr_tree, hf_vrt_tflag, tvb, (offset * 8) + 6, 1, ENC_NA);
 273     }
 274     offset += 1;
 275     proto_tree_add_item(hdr_tree, hf_vrt_tsi, tvb, offset, 1, ENC_NA);
 276     proto_tree_add_item(hdr_tree, hf_vrt_tsf, tvb, offset, 1, ENC_NA);
 277     proto_tree_add_item(hdr_tree, hf_vrt_seq, tvb, offset, 1, ENC_NA);
 278     offset += 1;
 279     proto_tree_add_item(hdr_tree, hf_vrt_len, tvb, offset, 2, ENC_BIG_ENDIAN);
 280 }
 281
 282 void dissect_trailer(tvbuff_t *tvb, proto_tree *tree, int offset)
 283 {
 284     proto_item *enable_item, *ind_item, *trailer_item;
 285     proto_tree *enable_tree;
 286     proto_tree *ind_tree;
 287     proto_tree *trailer_tree;
 288     guint16 en_bits;
 289     gint16 i;
 290
 291     trailer_item = proto_tree_add_item(tree, hf_vrt_trailer, tvb, offset, 4, ENC_BIG_ENDIAN);
 292     trailer_tree = proto_item_add_subtree(trailer_item, ett_trailer);
 293
 294     /* grab the indicator enables and the indicators
 295        only display enables, indicators which are enabled */
 296     enable_item = proto_tree_add_item(trailer_tree, hf_vrt_trailer_enables, tvb, offset, 2, ENC_NA);
 297     ind_item = proto_tree_add_item(trailer_tree, hf_vrt_trailer_ind, tvb, offset + 1, 2, ENC_NA);
 298     /* grab enable bits */
 299     en_bits = (tvb_get_ntohs(tvb, offset) & 0xFFF0) >> 4;
 300
 301     /* if there's any enables, start trees for enable bits and for indicators
 302        only enables and indicators which are enabled get printed. */
 303     if(en_bits) {
 304         enable_tree = proto_item_add_subtree(enable_item, ett_ind_enables);
 305         ind_tree = proto_item_add_subtree(ind_item, ett_indicators);
 306         for(i = 11; i >= 0; i--) {
 307             if(en_bits & (1<<i)) {
 308                 proto_tree_add_bits_item(enable_tree, *enable_hfs[i], tvb, (offset+(i<3)) * 8 + (i+1), 1, ENC_NA);
 309                 proto_tree_add_bits_item(ind_tree, *ind_hfs[i], tvb, (offset+(i<8)+1) * 8 + (i+5), 1, ENC_NA);
 310             }
 311         }
 312     }
 313     offset += 3;
 314     proto_tree_add_bits_item(trailer_tree, hf_vrt_trailer_e, tvb, offset * 8, 1, ENC_NA);
 315     proto_tree_add_item(trailer_tree, hf_vrt_trailer_acpc, tvb, offset, 1, ENC_NA);
 316 }
 317
 318 void dissect_cid(tvbuff_t *tvb, proto_tree *tree, int offset)
 319 {
 320     proto_item *cid_item;
 321     proto_tree *cid_tree;
 322
 323     cid_item = proto_tree_add_item(tree, hf_vrt_cid, tvb, offset, 8, ENC_BIG_ENDIAN);
 324     cid_tree = proto_item_add_subtree(cid_item, ett_cid);
 325
 326     offset += 1;
 327     proto_tree_add_item(cid_tree, hf_vrt_cid_oui, tvb, offset, 3, ENC_BIG_ENDIAN);
 328     offset += 3;
 329     proto_tree_add_item(cid_tree, hf_vrt_cid_icc, tvb, offset, 2, ENC_BIG_ENDIAN);
 330     offset += 2;
 331     proto_tree_add_item(cid_tree, hf_vrt_cid_pcc, tvb, offset, 2, ENC_BIG_ENDIAN);
 332 }
 333
 334 void
 335 proto_register_vrt(void)
 336 {
 337     static hf_register_info hf[] = {
 338         { &hf_vrt_header,
 339             { "VRT header", "vrt.hdr",
 340             FT_UINT32, BASE_HEX,
 341             NULL, 0x00,
 342             NULL, HFILL }
 343         },
 344         { &hf_vrt_type,
 345             { "Packet type", "vrt.type",
 346             FT_UINT8, 4,
 347             VALS(packet_types), 0xF0,
 348             NULL, HFILL }
 349         },
 350         { &hf_vrt_cidflag,
 351             { "Class ID included", "vrt.cidflag",
 352             FT_BOOLEAN, BASE_NONE,
 353             NULL, 0x00,
 354             NULL, HFILL }
 355         },
 356         { &hf_vrt_tflag,
 357             { "Trailer included", "vrt.tflag",
 358             FT_BOOLEAN, BASE_NONE,
 359             NULL, 0x00,
 360             NULL, HFILL }
 361         },
 362         { &hf_vrt_tsmflag,
 363             { "Timestamp mode", "vrt.tsmflag",
 364             FT_UINT8, 1,
 365             VALS(tsm_types), 0x01,
 366             NULL, HFILL }
 367         },
 368         { &hf_vrt_tsi,
 369             { "Integer timestamp type", "vrt.tsi",
 370             FT_UINT8, 2,
 371             VALS(tsi_types), 0xC0,
 372             NULL, HFILL }
 373         },
 374         { &hf_vrt_tsf,
 375             { "Fractional timestamp type", "vrt.tsf",
 376             FT_UINT8, 2,
 377             VALS(tsf_types), 0x30,
 378             NULL, HFILL }
 379         },
 380         { &hf_vrt_seq,
 381             { "Sequence number", "vrt.seq",
 382             FT_UINT8, 4,
 383             NULL, 0x0F,
 384             NULL, HFILL }
 385         },
 386         { &hf_vrt_len,
 387             { "Length", "vrt.len",
 388             FT_UINT16, BASE_DEC,
 389             NULL, 0x00,
 390             NULL, HFILL }
 391         },
 392         { &hf_vrt_ts_int,
 393             { "Integer timestamp", "vrt.ts_int",
 394             FT_UINT32, BASE_DEC,
 395             NULL, 0x00,
 396             NULL, HFILL }
 397         },
 398         { &hf_vrt_ts_frac_sample,
 399             { "Fractional timestamp (samples)", "vrt.ts_frac_sample",
 400             FT_UINT64, BASE_DEC,
 401             NULL, 0x00,
 402             NULL, HFILL }
 403         },
 404         { &hf_vrt_ts_frac_picosecond,
 405             { "Fractional timestamp (picoseconds)", "vrt.ts_frac_picosecond",
 406             FT_DOUBLE, BASE_NONE,
 407             NULL, 0x00,
 408             NULL, HFILL }
 409         },
 410         { &hf_vrt_sid,
 411             { "Stream ID", "vrt.sid",
 412             FT_UINT32, BASE_HEX,
 413             NULL, 0x00,
 414             NULL, HFILL }
 415         },
 416         { &hf_vrt_cid,
 417             { "Class ID", "vrt.cid",
 418             FT_UINT64, BASE_HEX,
 419             NULL, 0x00,
 420             NULL, HFILL }
 421         },
 422         { &hf_vrt_data,
 423             { "Data", "vrt.data",
 424             FT_BYTES, BASE_NONE,
 425             NULL, 0x00,
 426             NULL, HFILL }
 427         },
 428         { &hf_vrt_trailer,
 429             { "Trailer", "vrt.trailer",
 430             FT_UINT32, BASE_HEX,
 431             NULL, 0x00,
 432             NULL, HFILL }
 433         },
 434         { &hf_vrt_trailer_enables,
 435             { "Indicator enable bits", "vrt.enables",
 436             FT_UINT16, BASE_HEX,
 437             NULL, 0xFFF0,
 438             NULL, HFILL }
 439         },
 440         { &hf_vrt_trailer_ind,
 441             { "Indicator bits", "vrt.indicators",
 442             FT_UINT16, BASE_HEX,
 443             NULL, 0x0FFF,
 444             NULL, HFILL }
 445         },
 446         { &hf_vrt_trailer_e,
 447             { "Associated context packet count enabled", "vrt.e",
 448             FT_BOOLEAN, BASE_NONE,
 449             NULL, 0x00,
 450             NULL, HFILL }
 451         },
 452         { &hf_vrt_trailer_acpc,
 453             { "Associated context packet count", "vrt.acpc",
 454             FT_UINT8, BASE_DEC,
 455             NULL, 0x7F,
 456             NULL, HFILL }
 457         },
 458         { &hf_vrt_trailer_ind_caltime,
 459             { "Calibrated time indicator", "vrt.caltime",
 460             FT_BOOLEAN, BASE_NONE,
 461             NULL, 0x00,
 462             NULL, HFILL }
 463         },
 464         { &hf_vrt_trailer_ind_valid,
 465             { "Valid signal indicator", "vrt.valid",
 466             FT_BOOLEAN, BASE_NONE,
 467             NULL, 0x00,
 468             NULL, HFILL }
 469         },
 470         { &hf_vrt_trailer_ind_reflock,
 471             { "Reference lock indicator", "vrt.reflock",
 472             FT_BOOLEAN, BASE_NONE,
 473             NULL, 0x00,
 474             NULL, HFILL }
 475         },
 476         { &hf_vrt_trailer_ind_agc,
 477             { "AGC/MGC indicator", "vrt.agc",
 478             FT_BOOLEAN, BASE_NONE,
 479             NULL, 0x00,
 480             NULL, HFILL }
 481         },
 482         { &hf_vrt_trailer_ind_sig,
 483             { "Signal detected indicator", "vrt.sig",
 484             FT_BOOLEAN, BASE_NONE,
 485             NULL, 0x00,
 486             NULL, HFILL }
 487         },
 488         { &hf_vrt_trailer_ind_inv,
 489             { "Spectral inversion indicator", "vrt.inv",
 490             FT_BOOLEAN, BASE_NONE,
 491             NULL, 0x00,
 492             NULL, HFILL }
 493         },
 494         { &hf_vrt_trailer_ind_overrng,
 495             { "Overrange indicator", "vrt.overrng",
 496             FT_BOOLEAN, BASE_NONE,
 497             NULL, 0x00,
 498             NULL, HFILL }
 499         },
 500         { &hf_vrt_trailer_ind_sampleloss,
 501             { "Lost sample indicator", "vrt.sampleloss",
 502             FT_BOOLEAN, BASE_NONE,
 503             NULL, 0x00,
 504             NULL, HFILL }
 505         },
 506         { &hf_vrt_trailer_ind_user0,
 507             { "User indicator 0", "vrt.user0",
 508             FT_BOOLEAN, BASE_NONE,
 509             NULL, 0x000,
 510             NULL, HFILL }
 511         },
 512         { &hf_vrt_trailer_ind_user1,
 513             { "User indicator 1", "vrt.user1",
 514             FT_BOOLEAN, BASE_NONE,
 515             NULL, 0x00,
 516             NULL, HFILL }
 517         },
 518         { &hf_vrt_trailer_ind_user2,
 519             { "User indicator 2", "vrt.user2",
 520             FT_BOOLEAN, BASE_NONE,
 521             NULL, 0x000,
 522             NULL, HFILL }
 523         },
 524         { &hf_vrt_trailer_ind_user3,
 525             { "User indicator 3", "vrt.user3",
 526             FT_BOOLEAN, BASE_NONE,
 527             NULL, 0x00,
 528             NULL, HFILL }
 529         },
 530         { &hf_vrt_trailer_en_caltime,
 531             { "Calibrated time indicator enable", "vrt.caltime_en",
 532             FT_BOOLEAN, BASE_NONE,
 533             NULL, 0x00,
 534             NULL, HFILL }
 535         },
 536         { &hf_vrt_trailer_en_valid,
 537             { "Valid signal indicator enable", "vrt.valid_en",
 538             FT_BOOLEAN, BASE_NONE,
 539             NULL, 0x00,
 540             NULL, HFILL }
 541         },
 542         { &hf_vrt_trailer_en_reflock,
 543             { "Reference lock indicator enable", "vrt.reflock_en",
 544             FT_BOOLEAN, BASE_NONE,
 545             NULL, 0x00,
 546             NULL, HFILL }
 547         },
 548         { &hf_vrt_trailer_en_agc,
 549             { "AGC/MGC indicator enable", "vrt.agc_en",
 550             FT_BOOLEAN, BASE_NONE,
 551             NULL, 0x00,
 552             NULL, HFILL }
 553         },
 554         { &hf_vrt_trailer_en_sig,
 555             { "Signal detected indicator enable", "vrt.sig_en",
 556             FT_BOOLEAN, BASE_NONE,
 557             NULL, 0x00,
 558             NULL, HFILL }
 559         },
 560         { &hf_vrt_trailer_en_inv,
 561             { "Spectral inversion indicator enable", "vrt.inv_en",
 562             FT_BOOLEAN, BASE_NONE,
 563             NULL, 0x00,
 564             NULL, HFILL }
 565         },
 566         { &hf_vrt_trailer_en_overrng,
 567             { "Overrange indicator enable", "vrt.overrng_en",
 568             FT_BOOLEAN, BASE_NONE,
 569             NULL, 0x00,
 570             NULL, HFILL }
 571         },
 572         { &hf_vrt_trailer_en_sampleloss,
 573             { "Lost sample indicator enable", "vrt.sampleloss_en",
 574             FT_BOOLEAN, BASE_NONE,
 575             NULL, 0x00,
 576             NULL, HFILL }
 577         },
 578         { &hf_vrt_trailer_en_user0,
 579             { "User indicator 0 enable", "vrt.user0_en",
 580             FT_BOOLEAN, BASE_NONE,
 581             NULL, 0x00,
 582             NULL, HFILL }
 583         },
 584         { &hf_vrt_trailer_en_user1,
 585             { "User indicator 1 enable", "vrt.user1_en",
 586             FT_BOOLEAN, BASE_NONE,
 587             NULL, 0x00,
 588             NULL, HFILL }
 589         },
 590         { &hf_vrt_trailer_en_user2,
 591             { "User indicator 2 enable", "vrt.user2_en",
 592             FT_BOOLEAN, BASE_NONE,
 593             NULL, 0x00,
 594             NULL, HFILL }
 595         },
 596         { &hf_vrt_trailer_en_user3,
 597             { "User indicator 3 enable", "vrt.user3_en",
 598             FT_BOOLEAN, BASE_NONE,
 599             NULL, 0x00,
 600             NULL, HFILL }
 601         },
 602         { &hf_vrt_cid_oui,
 603             { "Class ID Organizationally Unique ID", "vrt.oui",
 604             FT_UINT24, BASE_HEX,
 605             NULL, 0x00,
 606             NULL, HFILL }
 607         },
 608         { &hf_vrt_cid_icc,
 609             { "Class ID Information Class Code", "vrt.icc",
 610             FT_UINT16, BASE_DEC,
 611             NULL, 0x00,
 612             NULL, HFILL }
 613         },
 614         { &hf_vrt_cid_pcc,
 615             { "Class ID Packet Class Code", "vrt.pcc",
 616             FT_UINT16, BASE_DEC,
 617             NULL, 0x00,
 618             NULL, HFILL }
 619         }
 620     };
 621
 622     static gint *ett[] = {
 623         &ett_vrt,
 624         &ett_header,
 625         &ett_trailer,
 626         &ett_indicators,
 627         &ett_ind_enables,
 628         &ett_cid
 629      };
 630
 631     module_t *vrt_module;
 632
 633     proto_vrt = proto_register_protocol (
 634         "VITA 49 radio transport protocol", /* name       */
 635         "VITA 49",      /* short name */
 636         "vrt"       /* abbrev     */
 637         );
 638
 639     proto_register_field_array(proto_vrt, hf, array_length(hf));
 640     proto_register_subtree_array(ett, array_length(ett));
 641
 642     vrt_module = prefs_register_protocol(proto_vrt, proto_reg_handoff_vrt);
 643     prefs_register_uint_preference(vrt_module,
 644         "dissector_port",
 645         "Dissector UDP port",
 646         "The UDP port used by this dissector",
 647         10, &dissector_port_pref);
 648 }
 649
 650 void
 651 proto_reg_handoff_vrt(void)
 652 {
 653     static gboolean vrt_prefs_initialized = FALSE;
 654     static dissector_handle_t vrt_handle;
 655     static gint dissector_port;
 656
 657     if (!vrt_prefs_initialized) {
 658         vrt_handle = create_dissector_handle(dissect_vrt, proto_vrt);
 659         vrt_prefs_initialized = TRUE;
 660     } else {
 661         dissector_delete_uint("udp.port", dissector_port, vrt_handle);
 662     }
 663
 664     dissector_port = dissector_port_pref;
 665
 666     dissector_add_uint("udp.port", dissector_port, vrt_handle);
 667 }
 668
 669 /*
 670  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 671  *
 672  * Local variables:
 673  * c-basic-offset: 4
 674  * tab-width: 8
 675  * indent-tabs-mode: nil
 676  * End:
 677  *
 678  * vi: set shiftwidth=4 tabstop=8 expandtab:
 679  * :indentSize=4:tabSize=8:noTabs=true:
 680  */