packet-dccp.c

   1 /* packet-dccp.c
   2  * Routines for Distributed Checksum Clearinghouse packet dissection
   3  * DCC Home: http://www.rhyolite.com/anti-spam/dcc/
   4  *
   5  * Copyright 1999, Nathan Neulinger <nneul@umr.edu>
   6  *
   7  * $Id$
   8  *
   9  * Ethereal - Network traffic analyzer
  10  * By Gerald Combs <gerald@ethereal.com>
  11  * Copyright 1998 Gerald Combs
  12  *
  13  * Copied from packet-tftp.c
  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 #include <stdio.h>
  35
  36 #include <string.h>
  37 #include <glib.h>
  38 #include <epan/packet.h>
  39
  40 #include <packet-dccp.h>
  41
  42 static int proto_dccp = -1;
  43 static int hf_dccp_len = -1;
  44 static int hf_dccp_pkt_vers = -1;
  45 static int hf_dccp_op = -1;
  46 static int hf_dccp_clientid = -1;
  47 static int hf_dccp_opnums_host = -1;
  48 static int hf_dccp_opnums_pid = -1;
  49 static int hf_dccp_opnums_report = -1;
  50 static int hf_dccp_opnums_retrans = -1;
  51
  52 static int hf_dccp_signature = -1;
  53 static int hf_dccp_max_pkt_vers = -1;
  54 static int hf_dccp_qdelay_ms = -1;
  55 static int hf_dccp_brand = -1;
  56
  57 static int hf_dccp_ck_type = -1;
  58 static int hf_dccp_ck_len = -1;
  59 static int hf_dccp_ck_sum = -1;
  60
  61 static int hf_dccp_date = -1;
  62
  63 static int hf_dccp_target = -1;
  64
  65 static int hf_dccp_adminop = -1;
  66 static int hf_dccp_adminval = -1;
  67 static int hf_dccp_floodop = -1;
  68 static int hf_dccp_trace = -1;
  69 static int hf_dccp_trace_admin = -1;
  70 static int hf_dccp_trace_anon = -1;
  71 static int hf_dccp_trace_client = -1;
  72 static int hf_dccp_trace_rlim = -1;
  73 static int hf_dccp_trace_query = -1;
  74 static int hf_dccp_trace_ridc = -1;
  75 static int hf_dccp_trace_flood = -1;
  76
  77 static gint ett_dccp = -1;
  78 static gint ett_dccp_opnums = -1;
  79 static gint ett_dccp_op = -1;
  80 static gint ett_dccp_ck = -1;
  81 static gint ett_dccp_trace = -1;
  82
  83 /* Utility macros */
  84 #define D_SIGNATURE() \
  85         proto_tree_add_item(dccp_optree, hf_dccp_signature, tvb, \
  86                 offset, sizeof(DCC_SIGNATURE), FALSE); \
  87         offset += sizeof(DCC_SIGNATURE);
  88
  89 #define D_LABEL(label,len) \
  90         proto_tree_add_text(dccp_optree, tvb, offset, len, label); \
  91         offset += len;
  92
  93 #define D_TEXT(label, endpad) { \
  94         int next_offset,linelen,left; \
  95         const char *line; \
  96         while (tvb_offset_exists(tvb, offset+endpad)) { \
  97                 left = tvb_length_remaining(tvb,offset) - endpad; \
  98                 linelen = tvb_find_line_end(tvb, offset, left, &next_offset, \
  99                     FALSE); \
 100                 line = tvb_get_ptr(tvb, offset, linelen); \
 101                 proto_tree_add_text(dccp_optree, tvb, offset, \
 102                         next_offset - offset, "%s: %s", \
 103                         label, tvb_format_text(tvb, offset, next_offset - offset)); \
 104                 offset = next_offset; \
 105         } \
 106 }
 107
 108
 109 #define D_TARGET() \
 110         proto_tree_add_item_hidden(dccp_tree, hf_dccp_target, tvb, \
 111                 offset, sizeof(DCC_TGTS), FALSE); \
 112         proto_tree_add_text(dccp_optree, tvb, offset, sizeof(DCC_TGTS), \
 113                 val_to_str(tvb_get_ntohl(tvb,offset), dccp_target_vals, "Targets (%u)")); \
 114         offset += sizeof(DCC_TGTS); \
 115
 116 #define D_DATE() { \
 117         nstime_t ts; \
 118         ts.nsecs = 0; \
 119         ts.secs = tvb_get_ntohl(tvb,offset); \
 120         proto_tree_add_time(dccp_optree, hf_dccp_date, tvb, offset, 4, &ts); \
 121         offset += 4; \
 122 }
 123
 124
 125 #define D_CHECKSUM() { \
 126         proto_tree *cktree, *ti; \
 127         ti = proto_tree_add_text(dccp_optree, tvb, offset, sizeof(DCC_CK), \
 128                 "Checksum - %s", val_to_str(tvb_get_guint8(tvb,offset), \
 129                 dccp_cktype_vals, \
 130                 "Unknown Type: %u")); \
 131         cktree = proto_item_add_subtree(ti, ett_dccp_ck); \
 132         proto_tree_add_item(cktree, hf_dccp_ck_type, tvb, offset, 1, FALSE); \
 133         offset += 1; \
 134         proto_tree_add_item(cktree, hf_dccp_ck_len, tvb, offset, 1, FALSE); \
 135         offset += 1; \
 136         proto_tree_add_item(cktree, hf_dccp_ck_sum, tvb, offset, \
 137                 sizeof(DCC_SUM), FALSE); \
 138         offset += sizeof(DCC_SUM); \
 139 }
 140
 141
 142 /* Lookup string tables */
 143 static const value_string dccp_op_vals[] = {
 144         {DCC_OP_INVALID, "Invalid Op"},
 145         {DCC_OP_NOP,    "No-Op"},
 146         {DCC_OP_REPORT, "Report and Query"},
 147         {DCC_OP_QUERY, "Query"},
 148         {DCC_OP_QUERY_RESP, "Server Response"},
 149         {DCC_OP_ADMN, "Admin"},
 150         {DCC_OP_OK, "Ok"},
 151         {DCC_OP_ERROR, "Server Failing"},
 152         {DCC_OP_DELETE, "Delete Checksum(s)"},
 153         {0, NULL}
 154 };
 155
 156 static const value_string dccp_cktype_vals[] = {
 157         {DCC_CK_INVALID, "Invalid/Deleted from DB when seen"},
 158         {DCC_CK_IP,     "MD5 of binary source IPv6 address"},
 159         {DCC_CK_ENV_FROM, "MD5 of envelope Mail From value"},
 160         {DCC_CK_FROM, "MD5 of header From: line"},
 161         {DCC_CK_SUB, "MD5 of substitute header line"},
 162         {DCC_CK_MESSAGE_ID, "MD5 of header Message-ID: line"},
 163         {DCC_CK_RECEIVED, "MD5 of last header Received: line"},
 164         {DCC_CK_BODY, "MD5 of body"},
 165         {DCC_CK_FUZ1, "MD5 of filtered body - FUZ1"},
 166         {DCC_CK_FUZ2, "MD5 of filtered body - FUZ2"},
 167         {DCC_CK_FUZ3, "MD5 of filtered body - FUZ3"},
 168         {DCC_CK_FUZ4, "MD5 of filtered body - FUZ4"},
 169         {DCC_CK_SRVR_ID, "hostname for server-ID check "},
 170         {DCC_CK_ENV_TO, "MD5 of envelope Rcpt To value"},
 171         {0, NULL},
 172 };
 173
 174 static const value_string dccp_adminop_vals[] = {
 175         {DCC_AOP_OK, "Never sent"},
 176         {DCC_AOP_STOP, "Stop Gracefully"},
 177         {DCC_AOP_NEW_IDS, "Load keys and client IDs"},
 178         {DCC_AOP_FLOD, "Flood control"},
 179         {DCC_AOP_DB_UNLOCK, "Start Switch to new database"},
 180         {DCC_AOP_DB_NEW, "Finish Switch to new database"},
 181         {DCC_AOP_STATS, "Return counters"},
 182         {DCC_AOP_STATS_CLEAR, "Return and zero counters"},
 183         {DCC_AOP_TRACE_ON, "Enable tracing"},
 184         {DCC_AOP_TRACE_OFF, "Disable tracing"},
 185         {DCC_AOP_CUR_CLIENTS, "List clients"},
 186         {0, NULL},
 187 };
 188
 189 static const value_string dccp_target_vals[] = {
 190         {DCC_TGTS_TOO_MANY, "Targets (>= 16777200)"},
 191         {DCC_TGTS_OK, "Certified not spam"},
 192         {DCC_TGTS_OK2, "Half certified not spam"},
 193         {DCC_TGTS_DEL, "Deleted checksum"},
 194         {DCC_TGTS_INVALID, "Invalid"},
 195         {0, NULL},
 196 };
 197
 198 static const value_string dccp_floodop_vals[] = {
 199         {DCC_AOP_FLOD_CHECK, "Check"},
 200         {DCC_AOP_FLOD_SHUTDOWN, "Shutdown"},
 201         {DCC_AOP_FLOD_HALT, "Halt"},
 202         {DCC_AOP_FLOD_RESUME, "Resume"},
 203         {DCC_AOP_FLOD_REWIND, "Rewind"},
 204         {DCC_AOP_FLOD_LIST, "List"},
 205         {DCC_AOP_FLOD_STATS, "Stats"},
 206         {DCC_AOP_FLOD_STATS_CLEAR, "Clear Stats"},
 207         {0,NULL},
 208 };
 209
 210 static gboolean
 211 dissect_dccp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 212 {
 213         proto_tree      *dccp_tree, *dccp_optree, *dccp_opnumtree, *ti;
 214         proto_tree *dccp_tracetree;
 215         int offset = 0;
 216         int client_is_le = 0;
 217         int op = 0;
 218         int i, is_response;
 219
 220         if (pinfo->srcport != DCC_PORT && pinfo->destport != DCC_PORT) {
 221                 /* Not the right port - not a DCC packet. */
 222                 return FALSE;
 223         }
 224
 225         /* get at least a full packet structure */
 226         if ( !tvb_bytes_exist(tvb, 0, sizeof(DCC_HDR)) ) {
 227                 /* Doesn't have enough bytes to contain packet header. */
 228                 return FALSE;
 229         }
 230
 231         if (check_col(pinfo->cinfo, COL_PROTOCOL))
 232                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "DCCP");
 233
 234         offset = 0;
 235         is_response = pinfo->srcport == DCC_PORT;
 236
 237         if (check_col(pinfo->cinfo, COL_INFO)) {
 238                 col_add_fstr(pinfo->cinfo, COL_INFO,
 239                         "%s: %s",
 240                         is_response ? "Response" : "Request",
 241                         val_to_str(tvb_get_guint8(tvb, offset+3),
 242                                  dccp_op_vals, "Unknown Op: %u")
 243                 );
 244         }
 245
 246         if (tree) {
 247                 ti = proto_tree_add_item(tree, proto_dccp, tvb, offset, -1,
 248                         FALSE);
 249                 dccp_tree = proto_item_add_subtree(ti, ett_dccp);
 250
 251                 proto_tree_add_item(dccp_tree, hf_dccp_len, tvb,
 252                         offset, 2, FALSE);
 253
 254                 if ( !tvb_bytes_exist(tvb, 0, tvb_get_ntohs(tvb, offset))) {
 255                         /* Doesn't have number of bytes that header claims. */
 256                         proto_tree_add_text(dccp_tree, tvb, offset, 2, "Error - packet is shorter than header claims!");
 257                 }
 258                 offset += 2;
 259
 260                 proto_tree_add_item(dccp_tree, hf_dccp_pkt_vers, tvb,
 261                         offset, 1, FALSE);
 262                 offset += 1;
 263
 264                 op = tvb_get_guint8(tvb, offset);
 265                 proto_tree_add_item(dccp_tree, hf_dccp_op, tvb,
 266                         offset, 1, FALSE);
 267                 offset += 1;
 268
 269                 proto_tree_add_item(dccp_tree, hf_dccp_clientid, tvb,
 270                         offset, 4, FALSE);
 271                 offset += 4;
 272
 273                 ti = proto_tree_add_text(dccp_tree, tvb, offset, -1, "Operation Numbers (Opaque to Server)");
 274                 dccp_opnumtree = proto_item_add_subtree(ti, ett_dccp_opnums);
 275
 276                 /* Note - these are indeterminate - they are sortof considered opaque to the client */
 277                 /* Make some attempt to figure out if this data is little endian, not guaranteed to be
 278                 correct if connection went through a firewall or similar. */
 279
 280                 /* Very hokey check - if all three of pid/report/retrans look like little-endian
 281                         numbers, host is probably little endian. Probably innacurate on super-heavily-used
 282                         DCC clients though. This should be good enough for now. */
 283                 client_is_le = ( (tvb_get_guint8(tvb, offset+4) | tvb_get_guint8(tvb, offset+4)) &&
 284                                                  (tvb_get_guint8(tvb, offset+8) | tvb_get_guint8(tvb, offset+9)) &&
 285                                                  (tvb_get_guint8(tvb, offset+12) | tvb_get_guint8(tvb, offset+13)) );
 286
 287                 proto_tree_add_item(dccp_opnumtree, hf_dccp_opnums_host, tvb,
 288                         offset, 4, client_is_le);
 289                 offset += 4;
 290
 291                 proto_tree_add_item(dccp_opnumtree, hf_dccp_opnums_pid, tvb,
 292                         offset, 4, client_is_le);
 293                 offset += 4;
 294
 295                 proto_tree_add_item(dccp_opnumtree, hf_dccp_opnums_report, tvb,
 296                         offset, 4, client_is_le);
 297                 offset += 4;
 298
 299                 proto_tree_add_item(dccp_opnumtree, hf_dccp_opnums_retrans, tvb,
 300                         offset, 4, client_is_le);
 301                 offset += 4;
 302
 303                 ti = proto_tree_add_text(dccp_tree, tvb, offset, -1, "Operation: %s",
 304                         val_to_str(op, dccp_op_vals, "Unknown Op: %u"));
 305                 dccp_optree = proto_item_add_subtree(ti, ett_dccp_op);
 306
 307                 switch(op) {
 308                         case DCC_OP_NOP:
 309                                 D_SIGNATURE();
 310                                 break;
 311
 312                         case DCC_OP_REPORT:
 313                                 D_TARGET();
 314                                 for (i=0; i<=DCC_QUERY_MAX &&
 315                                         tvb_bytes_exist(tvb, offset+sizeof(DCC_SIGNATURE),1); i++)
 316                                 {
 317                                         D_CHECKSUM();
 318                                 }
 319                                 D_SIGNATURE();
 320                                 break;
 321
 322                         case DCC_OP_QUERY_RESP:
 323                                 for (i=0; i<=DCC_QUERY_MAX &&
 324                                         tvb_bytes_exist(tvb, offset+sizeof(DCC_SIGNATURE),1); i++)
 325                                 {
 326                                         D_TARGET();
 327                                 }
 328                                 D_SIGNATURE();
 329                                 break;
 330
 331                         case DCC_OP_ADMN:
 332                                 if ( is_response )
 333                                 {
 334                                         int left = tvb_length_remaining(tvb, offset) -
 335                                                 sizeof(DCC_SIGNATURE);
 336                                         if ( left == sizeof(DCC_ADMN_RESP_CLIENTS) )
 337                                         {
 338                                                 D_LABEL("Addr", 16);
 339                                                 D_LABEL("Id", sizeof(DCC_CLNT_ID));
 340                                                 D_LABEL("Last Used", 4);
 341                                                 D_LABEL("Requests", 4);
 342                                         }
 343                                         else
 344                                         {
 345                                                 D_TEXT("Response Text", sizeof(DCC_SIGNATURE));
 346                                         }
 347                                         D_SIGNATURE();
 348                                 }
 349                                 else
 350                                 {
 351                                         int aop;
 352
 353                                         D_DATE();
 354
 355                                         aop = tvb_get_guint8(tvb, offset+4);
 356                                         proto_tree_add_item(dccp_optree, hf_dccp_adminop, tvb, offset+4,
 357                                                 1, FALSE);
 358                                         if (check_col(pinfo->cinfo, COL_INFO)) {
 359                                                 col_append_fstr(pinfo->cinfo, COL_INFO, ", %s",
 360                                                         val_to_str(tvb_get_guint8(tvb,offset+4),
 361                                                         dccp_adminop_vals, "Unknown (%u)"));
 362                                         }
 363
 364                                         if (aop == DCC_AOP_TRACE_ON || aop == DCC_AOP_TRACE_OFF )
 365                                         {
 366                                                 ti = proto_tree_add_item(dccp_optree, hf_dccp_trace, tvb, offset,
 367                                                         4, FALSE);
 368                                                 dccp_tracetree = proto_item_add_subtree(ti, ett_dccp_trace);
 369                                                 proto_tree_add_item(dccp_tracetree, hf_dccp_trace_admin, tvb, offset, 4, FALSE);
 370                                                 proto_tree_add_item(dccp_tracetree, hf_dccp_trace_anon, tvb, offset, 4, FALSE);
 371                                                 proto_tree_add_item(dccp_tracetree, hf_dccp_trace_client, tvb, offset, 4, FALSE);
 372                                                 proto_tree_add_item(dccp_tracetree, hf_dccp_trace_rlim, tvb, offset, 4, FALSE);
 373                                                 proto_tree_add_item(dccp_tracetree, hf_dccp_trace_query, tvb, offset, 4, FALSE);
 374                                                 proto_tree_add_item(dccp_tracetree, hf_dccp_trace_ridc, tvb, offset, 4, FALSE);
 375                                                 proto_tree_add_item(dccp_tracetree, hf_dccp_trace_flood, tvb, offset, 4, FALSE);
 376                                         }
 377                                         else if ( aop == DCC_AOP_FLOD )
 378                                         {
 379                                                 proto_tree_add_item(dccp_optree, hf_dccp_floodop,
 380                                                         tvb, offset, 4, FALSE);
 381                                                 if (check_col(pinfo->cinfo, COL_INFO)) {
 382                                                         col_append_fstr(pinfo->cinfo, COL_INFO, ", %s",
 383                                                                 val_to_str(tvb_get_ntohl(tvb,offset),
 384                                                                 dccp_floodop_vals, "Unknown (%u)"));
 385                                                 }
 386                                         }
 387                                         else
 388                                         {
 389                                                 proto_tree_add_item(dccp_optree, hf_dccp_adminval,
 390                                                         tvb, offset, 4, FALSE);
 391                                         }
 392                                         offset += 4;
 393
 394                                         offset += 1; /* admin op we did in reverse order */
 395                                         D_LABEL("Pad", 3);
 396                                         D_SIGNATURE();
 397                                 }
 398                                 break;
 399
 400                         case DCC_OP_OK:
 401                                 proto_tree_add_item(dccp_optree, hf_dccp_max_pkt_vers, tvb,
 402                                         offset, 1, FALSE);
 403                                 offset += 1;
 404
 405                                 D_LABEL("Unused", 1);
 406
 407                                 proto_tree_add_item(dccp_optree, hf_dccp_qdelay_ms, tvb,
 408                                         offset, 2, FALSE);
 409                                 offset += 2;
 410
 411                                 proto_tree_add_item(dccp_optree, hf_dccp_brand, tvb,
 412                                         offset, sizeof(DCC_BRAND), FALSE);
 413                                 offset += sizeof(DCC_BRAND);
 414
 415                                 D_SIGNATURE();
 416                                 break;
 417
 418                         default:
 419                                 /* do nothing */
 420                                 break;
 421                 }
 422         }
 423
 424         return TRUE;
 425 }
 426
 427 void
 428 proto_register_dccp(void)
 429 {
 430         static hf_register_info hf[] = {
 431                         { &hf_dccp_len, {
 432                                 "Packet Length", "dccp.len", FT_UINT16, BASE_DEC,
 433                                 NULL, 0, "Packet Length", HFILL }},
 434
 435                         { &hf_dccp_pkt_vers, {
 436                                 "Packet Version", "dccp.pkt_vers", FT_UINT16, BASE_DEC,
 437                                 NULL, 0, "Packet Version", HFILL }},
 438
 439                         { &hf_dccp_op, {
 440                                 "Operation Type", "dccp.op", FT_UINT8, BASE_DEC,
 441                                 VALS(dccp_op_vals), 0, "Operation Type", HFILL }},
 442
 443                         { &hf_dccp_clientid, {
 444                                 "Client ID", "dccp.clientid", FT_UINT32, BASE_DEC,
 445                                 NULL, 0, "Client ID", HFILL }},
 446
 447                         { &hf_dccp_opnums_host, {
 448                                 "Host", "dccp.opnums.host", FT_IPv4, BASE_DEC,
 449                                 NULL, 0, "Host", HFILL }},
 450
 451                         { &hf_dccp_opnums_pid, {
 452                                 "Process ID", "dccp.opnums.pid", FT_UINT32, BASE_DEC,
 453                                 NULL, 0, "Process ID", HFILL }},
 454
 455                         { &hf_dccp_opnums_report, {
 456                                 "Report", "dccp.opnums.report", FT_UINT32, BASE_DEC,
 457                                 NULL, 0, "Report", HFILL }},
 458
 459                         { &hf_dccp_opnums_retrans, {
 460                                 "Retransmission", "dccp.opnums.retrans", FT_UINT32, BASE_DEC,
 461                                 NULL, 0, "Retransmission", HFILL }},
 462
 463                         { &hf_dccp_signature, {
 464                                 "Signature", "dccp.signature", FT_BYTES, BASE_HEX,
 465                                 NULL, 0, "Signature", HFILL }},
 466
 467                         { &hf_dccp_max_pkt_vers, {
 468                                 "Maximum Packet Version", "dccp.max_pkt_vers", FT_UINT8, BASE_DEC,
 469                                 NULL, 0, "Maximum Packet Version", HFILL }},
 470
 471                         { &hf_dccp_qdelay_ms, {
 472                                 "Client Delay", "dccp.qdelay_ms", FT_UINT16, BASE_DEC,
 473                                 NULL, 0, "Client Delay", HFILL }},
 474
 475                         { &hf_dccp_brand, {
 476                                 "Server Brand", "dccp.brand", FT_STRING, BASE_DEC,
 477                                 NULL, 0, "Server Brand", HFILL }},
 478
 479                         { &hf_dccp_ck_type, {
 480                                 "Type", "dccp.checksum.type", FT_UINT8, BASE_DEC,
 481                                 VALS(dccp_cktype_vals), 0, "Checksum Type", HFILL }},
 482
 483                         { &hf_dccp_ck_len, {
 484                                 "Length", "dccp.checksum.length", FT_UINT8, BASE_DEC,
 485                                 NULL, 0, "Checksum Length", HFILL }},
 486
 487                         { &hf_dccp_ck_sum, {
 488                                 "Sum", "dccp.checksum.sum", FT_BYTES, BASE_HEX,
 489                                 NULL, 0, "Checksum", HFILL }},
 490
 491                         { &hf_dccp_target, {
 492                                 "Target", "dccp.target", FT_UINT32, BASE_HEX,
 493                                 NULL, 0, "Target", HFILL }},
 494
 495                         { &hf_dccp_date, {
 496                                 "Date", "dccp.date", FT_ABSOLUTE_TIME, BASE_DEC,
 497                                 NULL, 0, "Date", HFILL }},
 498
 499                         { &hf_dccp_adminop, {
 500                                 "Admin Op", "dccp.adminop", FT_UINT8, BASE_DEC,
 501                                 VALS(dccp_adminop_vals), 0, "Admin Op", HFILL }},
 502
 503                         { &hf_dccp_adminval, {
 504                                 "Admin Value", "dccp.adminval", FT_UINT32, BASE_DEC,
 505                                 NULL, 0, "Admin Value", HFILL }},
 506
 507                         { &hf_dccp_trace, {
 508                                 "Trace Bits", "dccp.trace", FT_UINT32, BASE_HEX,
 509                                 NULL, 0, "Trace Bits", HFILL }},
 510
 511                         { &hf_dccp_trace_admin, {
 512                                 "Admin Requests", "dccp.trace.admin", FT_BOOLEAN, 32,
 513                                 NULL, 0x00000001, "Admin Requests", HFILL }},
 514
 515                         { &hf_dccp_trace_anon, {
 516                                 "Anonymous Requests", "dccp.trace.anon", FT_BOOLEAN, 32,
 517                                 NULL, 0x00000002, "Anonymous Requests", HFILL }},
 518
 519                         { &hf_dccp_trace_client, {
 520                                 "Authenticated Client Requests", "dccp.trace.client", FT_BOOLEAN, 32,
 521                                 NULL, 0x00000004, "Authenticated Client Requests", HFILL }},
 522
 523                         { &hf_dccp_trace_rlim, {
 524                                 "Rate-Limited Requests", "dccp.trace.rlim", FT_BOOLEAN, 32,
 525                                 NULL, 0x00000008, "Rate-Limited Requests", HFILL }},
 526
 527                         { &hf_dccp_trace_query, {
 528                                 "Queries and Reports", "dccp.trace.query", FT_BOOLEAN, 32,
 529                                 NULL, 0x00000010, "Queries and Reports", HFILL }},
 530
 531                         { &hf_dccp_trace_ridc, {
 532                                 "RID Cache Messages", "dccp.trace.ridc", FT_BOOLEAN, 32,
 533                                 NULL, 0x00000020, "RID Cache Messages", HFILL }},
 534
 535                         { &hf_dccp_trace_flood, {
 536                                 "Input/Output Flooding", "dccp.trace.flood", FT_BOOLEAN, 32,
 537                                 NULL, 0x00000040, "Input/Output Flooding", HFILL }},
 538
 539                         { &hf_dccp_floodop, {
 540                                 "Flood Control Operation", "dccp.floodop", FT_UINT32, BASE_DEC,
 541                                 VALS(dccp_floodop_vals), 0, "Flood Control Operation", HFILL }},
 542
 543         };
 544         static gint *ett[] = {
 545                 &ett_dccp,
 546                 &ett_dccp_op,
 547                 &ett_dccp_ck,
 548                 &ett_dccp_opnums,
 549                 &ett_dccp_trace,
 550         };
 551
 552         proto_dccp = proto_register_protocol("Distributed Checksum Clearinghouse Protocol",
 553             "DCCP", "dccp");
 554
 555         proto_register_field_array(proto_dccp, hf, array_length(hf));
 556
 557         proto_register_subtree_array(ett, array_length(ett));
 558 }
 559
 560 void
 561 proto_reg_handoff_dccp(void)
 562 {
 563         heur_dissector_add("udp", dissect_dccp, proto_dccp);
 564 }