epan/dissectors/packet-netsync.c

   1 /* packet-netsync.c
   2  * Routines for Monotone Netsync packet disassembly
   3  *
   4  * $Id$
   5  *
   6  * Copyright (c) 2005 by Erwin Rol <erwin@erwinrol.com>
   7  *
   8  * Ethereal - Network traffic analyzer
   9  * By Gerald Combs <gerald@ethereal.com>
  10  * Copyright 1999 Gerald Combs
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  25  */
  26
  27 /* Include files */
  28
  29 #ifdef HAVE_CONFIG_H
  30 #include "config.h"
  31 #endif
  32
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <ctype.h>
  36 #include <time.h>
  37 #include <string.h>
  38 #include <epan/packet.h>
  39 #include <epan/addr_resolv.h>
  40 #include <epan/prefs.h>
  41 #include <epan/strutil.h>
  42 #include <epan/emem.h>
  43 #include "packet-tcp.h"
  44
  45 /*
  46  * See
  47  *
  48  *      http://www.venge.net/monotone/
  49  */
  50
  51 /* Define TCP ports for Monotone netsync */
  52
  53 #define TCP_PORT_NETSYNC 5253
  54
  55 #define NETSYNC_ROLE_SOURCE     1
  56 #define NETSYNC_ROLE_SINK       2
  57 #define NETSYNC_ROLE_BOTH       3
  58
  59 static const value_string netsync_role_vals[] = {
  60         { NETSYNC_ROLE_SOURCE,  "Source" },
  61         { NETSYNC_ROLE_SINK,    "Sink" },
  62         { NETSYNC_ROLE_BOTH,    "Both" },
  63         { 0,                    NULL }
  64 };
  65
  66
  67 #define NETSYNC_CMD_ERROR       0
  68 #define NETSYNC_CMD_BYE         1
  69 #define NETSYNC_CMD_HELLO       2
  70 #define NETSYNC_CMD_ANONYMOUS   3
  71 #define NETSYNC_CMD_AUTH        4
  72 #define NETSYNC_CMD_CONFIRM     5
  73 #define NETSYNC_CMD_REFINE      6
  74 #define NETSYNC_CMD_DONE        7
  75 #define NETSYNC_CMD_SEND_DATA   8
  76 #define NETSYNC_CMD_SEND_DELTA  9
  77 #define NETSYNC_CMD_DATA        10
  78 #define NETSYNC_CMD_DELTA       11
  79 #define NETSYNC_CMD_NONEXISTANT 12
  80
  81 static const value_string netsync_cmd_vals[] = {
  82         { NETSYNC_CMD_ERROR,            "Error" },
  83         { NETSYNC_CMD_BYE,              "Bye" },
  84         { NETSYNC_CMD_HELLO,            "Hello" },
  85         { NETSYNC_CMD_ANONYMOUS,        "Anonymous" },
  86         { NETSYNC_CMD_AUTH,             "Auth" },
  87         { NETSYNC_CMD_CONFIRM,          "Confirm" },
  88         { NETSYNC_CMD_REFINE,           "Refine" },
  89         { NETSYNC_CMD_DONE,             "Done" },
  90         { NETSYNC_CMD_SEND_DATA,        "Send Data" },
  91         { NETSYNC_CMD_SEND_DELTA,       "Send Delta" },
  92         { NETSYNC_CMD_DATA,             "Data" },
  93         { NETSYNC_CMD_DELTA,            "Delta" },
  94         { NETSYNC_CMD_NONEXISTANT,      "Nonexistant" },
  95         { 0,                            NULL }
  96 };
  97
  98 #define NETSNYC_MERKLE_HASH_LENGTH 20
  99
 100 void proto_reg_handoff_netsync(void);
 101
 102 /* Define the monotone netsync proto */
 103 static int proto_netsync = -1;
 104
 105 static int hf_netsync_version = -1;
 106 static int hf_netsync_command = -1;
 107 static int hf_netsync_size = -1;
 108 static int hf_netsync_data = -1;
 109 static int hf_netsync_checksum = -1;
 110
 111 static int hf_netsync_cmd_done_level = -1;
 112 static int hf_netsync_cmd_done_type = -1;
 113
 114 static int hf_netsync_cmd_hello_keyname = -1;
 115 static int hf_netsync_cmd_hello_key = -1;
 116 static int hf_netsync_cmd_nonce = -1;
 117
 118 static int hf_netsync_cmd_anonymous_role = -1;
 119 static int hf_netsync_cmd_anonymous_collection = -1;
 120
 121 static int hf_netsync_cmd_send_data_type = -1;
 122 static int hf_netsync_cmd_send_data_id = -1;
 123
 124 static int hf_netsync_cmd_error_msg = -1;
 125
 126
 127 static int hf_netsync_cmd_confirm_sig = -1;
 128
 129 static int hf_netsync_cmd_auth_role = -1;
 130 static int hf_netsync_cmd_auth_collection = -1;
 131 static int hf_netsync_cmd_auth_id = -1;
 132 static int hf_netsync_cmd_auth_nonce1 = -1;
 133 static int hf_netsync_cmd_auth_nonce2 = -1;
 134 static int hf_netsync_cmd_auth_sig = -1;
 135
 136 static int hf_netsync_cmd_data_type = -1;
 137 static int hf_netsync_cmd_data_id = -1;
 138 static int hf_netsync_cmd_data_compressed = -1;
 139 static int hf_netsync_cmd_data_payload = -1;
 140
 141 static int hf_netsync_cmd_delta_type = -1;
 142 static int hf_netsync_cmd_delta_base_id = -1;
 143 static int hf_netsync_cmd_delta_ident_id = -1;
 144 static int hf_netsync_cmd_delta_compressed = -1;
 145 static int hf_netsync_cmd_delta_payload = -1;
 146
 147 static int hf_netsync_cmd_refine_tree_node = -1;
 148
 149 static int hf_netsync_cmd_send_delta_type = -1;
 150 static int hf_netsync_cmd_send_delta_base_id = -1;
 151 static int hf_netsync_cmd_send_delta_ident_id = -1;
 152
 153 static int hf_netsync_cmd_nonexistant_type = -1;
 154 static int hf_netsync_cmd_nonexistant_id = -1;
 155
 156 /* Define the tree for netsync */
 157 static int ett_netsync = -1;
 158
 159
 160 /*
 161  * Here are the global variables associated with the preferences
 162  * for monotone netsync
 163  */
 164
 165 static dissector_handle_t netsync_handle;
 166
 167 static guint global_tcp_port_netsync = TCP_PORT_NETSYNC;
 168 static guint tcp_port_netsync = TCP_PORT_NETSYNC;
 169 static gboolean netsync_desegment = TRUE;
 170
 171 static gint dissect_uleb128( tvbuff_t *tvb, gint offset, guint* size)
 172 {
 173         guint shift = 0;
 174         guint8 tmp;
 175         guint start_offset = offset;
 176
 177         *size = 0;
 178
 179         /* get size */
 180         do {
 181                 tmp = tvb_get_guint8(tvb, offset);
 182                 offset += 1;
 183
 184                 *size |= (tmp & 0x7F) << shift;
 185                 shift += 7;
 186         } while (tmp & 0x80);
 187
 188
 189         return offset - start_offset;
 190 }
 191
 192 static gint dissect_netsync_cmd_error( tvbuff_t *tvb,  gint offset, proto_tree *tree, guint size _U_)
 193 {
 194         guint len = 0;
 195
 196         offset += dissect_uleb128( tvb, offset, &len );
 197
 198         proto_tree_add_item(tree, hf_netsync_cmd_error_msg, tvb,
 199                                 offset, len, FALSE );
 200         offset += len;
 201
 202         return offset;
 203 }
 204
 205 static gint dissect_netsync_cmd_bye(tvbuff_t *tvb _U_,  gint offset, proto_tree *tree _U_, guint size _U_)
 206 {
 207         return offset;
 208 }
 209
 210
 211 static gint dissect_netsync_cmd_hello(tvbuff_t *tvb,  gint offset, proto_tree *tree, guint size _U_)
 212 {
 213         guint len = 0;
 214
 215         offset += dissect_uleb128( tvb, offset, &len );
 216
 217         proto_tree_add_item(tree, hf_netsync_cmd_hello_keyname, tvb,
 218                                 offset, len, FALSE );
 219         offset += len;
 220
 221
 222         offset += dissect_uleb128( tvb, offset, &len );
 223
 224         proto_tree_add_item(tree, hf_netsync_cmd_hello_key, tvb,
 225                                 offset, len, FALSE );
 226         offset += len;
 227
 228         proto_tree_add_item(tree, hf_netsync_cmd_nonce, tvb,
 229                                 offset, NETSNYC_MERKLE_HASH_LENGTH, FALSE );
 230         offset += NETSNYC_MERKLE_HASH_LENGTH;
 231
 232         return offset;
 233 }
 234
 235
 236 static gint dissect_netsync_cmd_anonymous(tvbuff_t *tvb,  gint offset, proto_tree *tree, guint size _U_)
 237 {
 238         guint len = 0;
 239
 240         proto_tree_add_item(tree, hf_netsync_cmd_anonymous_role, tvb,
 241                                 offset, 1, FALSE );
 242         offset += 1;
 243
 244         offset += dissect_uleb128( tvb, offset, &len );
 245
 246         proto_tree_add_item(tree, hf_netsync_cmd_anonymous_collection, tvb,
 247                                 offset, len, FALSE );
 248         offset += len;
 249
 250         proto_tree_add_item(tree, hf_netsync_cmd_nonce, tvb,
 251                                 offset, NETSNYC_MERKLE_HASH_LENGTH, FALSE );
 252         offset += NETSNYC_MERKLE_HASH_LENGTH;
 253
 254         return offset;
 255 }
 256
 257
 258 static gint dissect_netsync_cmd_auth(tvbuff_t *tvb,  gint offset, proto_tree *tree, guint size _U_)
 259 {
 260         guint len = 0;
 261
 262         proto_tree_add_item(tree, hf_netsync_cmd_auth_role, tvb,
 263                                 offset, 1, FALSE );
 264         offset += 1;
 265
 266
 267         offset += dissect_uleb128( tvb, offset, &len );
 268
 269         proto_tree_add_item(tree, hf_netsync_cmd_auth_collection, tvb,
 270                                 offset, len, FALSE );
 271         offset += len;
 272
 273         proto_tree_add_item(tree, hf_netsync_cmd_auth_id, tvb,
 274                                 offset, NETSNYC_MERKLE_HASH_LENGTH, FALSE );
 275         offset += NETSNYC_MERKLE_HASH_LENGTH;
 276
 277         offset += len;
 278
 279         proto_tree_add_item(tree, hf_netsync_cmd_auth_nonce1, tvb,
 280                                 offset, NETSNYC_MERKLE_HASH_LENGTH, FALSE );
 281         offset += NETSNYC_MERKLE_HASH_LENGTH;
 282
 283         offset += len;
 284
 285         proto_tree_add_item(tree, hf_netsync_cmd_auth_nonce2, tvb,
 286                                 offset, NETSNYC_MERKLE_HASH_LENGTH, FALSE );
 287         offset += NETSNYC_MERKLE_HASH_LENGTH;
 288
 289         offset += dissect_uleb128( tvb, offset, &len );
 290
 291         proto_tree_add_item(tree, hf_netsync_cmd_auth_sig, tvb,
 292                                 offset, len, FALSE );
 293         offset += len;
 294
 295         return offset;
 296 }
 297
 298
 299 static gint dissect_netsync_cmd_confirm(tvbuff_t *tvb,  gint offset, proto_tree *tree, guint size _U_)
 300 {
 301         guint len = 0;
 302
 303         offset += dissect_uleb128( tvb, offset, &len );
 304
 305         proto_tree_add_item(tree, hf_netsync_cmd_confirm_sig, tvb,
 306                                 offset, len, FALSE );
 307         offset += len;
 308
 309
 310         return offset;
 311 }
 312
 313
 314 static gint dissect_netsync_cmd_refine(tvbuff_t *tvb,  gint offset, proto_tree *tree, guint size)
 315 {
 316         proto_tree_add_item(tree, hf_netsync_cmd_refine_tree_node, tvb,
 317                                 offset, size, FALSE );
 318         offset += size;
 319
 320         return offset;
 321 }
 322
 323
 324 static gint dissect_netsync_cmd_done(tvbuff_t *tvb,  gint offset, proto_tree *tree, guint size _U_)
 325 {
 326         guint len = 0;
 327         guint bytes = 0;
 328
 329         bytes = dissect_uleb128( tvb, offset, &len );
 330
 331         proto_tree_add_uint(tree, hf_netsync_cmd_done_level, tvb,
 332                                         offset, bytes, len );
 333         offset += bytes;
 334
 335         proto_tree_add_item(tree, hf_netsync_cmd_done_type, tvb,
 336                                 offset, 1, FALSE );
 337         offset += 1;
 338
 339         return offset;
 340 }
 341
 342
 343 static gint dissect_netsync_cmd_send_data(tvbuff_t *tvb,  gint offset, proto_tree *tree, guint size _U_)
 344 {
 345         proto_tree_add_item(tree, hf_netsync_cmd_send_data_type, tvb,
 346                                         offset, 1, FALSE );
 347         offset += 1;
 348
 349         proto_tree_add_item(tree, hf_netsync_cmd_send_data_id, tvb,
 350                                 offset, NETSNYC_MERKLE_HASH_LENGTH, FALSE );
 351         offset += NETSNYC_MERKLE_HASH_LENGTH;
 352
 353         return offset;
 354 }
 355
 356
 357 static gint dissect_netsync_cmd_send_delta(tvbuff_t *tvb,  gint offset, proto_tree *tree, guint size _U_)
 358 {
 359         proto_tree_add_item(tree, hf_netsync_cmd_send_delta_type, tvb,
 360                                         offset, 1, FALSE );
 361         offset += 1;
 362
 363         proto_tree_add_item(tree, hf_netsync_cmd_send_delta_base_id, tvb,
 364                                 offset, NETSNYC_MERKLE_HASH_LENGTH, FALSE );
 365         offset += NETSNYC_MERKLE_HASH_LENGTH;
 366
 367
 368         proto_tree_add_item(tree, hf_netsync_cmd_send_delta_ident_id, tvb,
 369                                 offset, NETSNYC_MERKLE_HASH_LENGTH, FALSE );
 370         offset += NETSNYC_MERKLE_HASH_LENGTH;
 371
 372         return offset;
 373 }
 374
 375
 376 static gint dissect_netsync_cmd_data(tvbuff_t *tvb,  gint offset, proto_tree *tree, guint size _U_)
 377 {
 378         guint len = -1;
 379
 380         proto_tree_add_item(tree, hf_netsync_cmd_data_type, tvb,
 381                                 offset, 1, FALSE );
 382         offset += 1;
 383
 384         proto_tree_add_item(tree, hf_netsync_cmd_data_id, tvb,
 385                                 offset, NETSNYC_MERKLE_HASH_LENGTH, FALSE );
 386         offset += NETSNYC_MERKLE_HASH_LENGTH;
 387
 388         proto_tree_add_item(tree, hf_netsync_cmd_data_compressed, tvb,
 389                                 offset, 1, FALSE );
 390         offset += 1;
 391
 392         offset += dissect_uleb128( tvb, offset, &len );
 393
 394         proto_tree_add_item(tree, hf_netsync_cmd_data_payload, tvb,
 395                                 offset, len, FALSE );
 396         offset += len;
 397
 398         return offset;
 399 }
 400
 401
 402 static gint dissect_netsync_cmd_delta(tvbuff_t *tvb,  gint offset, proto_tree *tree, guint size _U_)
 403 {
 404         guint len = 0;
 405
 406         proto_tree_add_item(tree, hf_netsync_cmd_delta_type, tvb,
 407                                 offset, 1, FALSE );
 408         offset += 1;
 409
 410         proto_tree_add_item(tree, hf_netsync_cmd_delta_base_id, tvb,
 411                                 offset, NETSNYC_MERKLE_HASH_LENGTH, FALSE );
 412         offset += NETSNYC_MERKLE_HASH_LENGTH;
 413
 414         proto_tree_add_item(tree, hf_netsync_cmd_delta_ident_id, tvb,
 415                                 offset, NETSNYC_MERKLE_HASH_LENGTH, FALSE );
 416         offset += NETSNYC_MERKLE_HASH_LENGTH;
 417
 418         proto_tree_add_item(tree, hf_netsync_cmd_delta_compressed, tvb,
 419                                 offset, 1, FALSE );
 420         offset += 1;
 421
 422         offset += dissect_uleb128( tvb, offset, &len );
 423
 424         proto_tree_add_item(tree, hf_netsync_cmd_delta_payload, tvb,
 425                                 offset, len, FALSE );
 426         offset += len;
 427
 428         return offset;
 429 }
 430
 431
 432 static gint dissect_netsync_cmd_nonexistant(tvbuff_t *tvb,  gint offset, proto_tree *tree, guint size _U_)
 433 {
 434         proto_tree_add_item(tree, hf_netsync_cmd_nonexistant_type, tvb,
 435                                 offset, 1, FALSE );
 436         offset += 1;
 437
 438         proto_tree_add_item(tree, hf_netsync_cmd_nonexistant_id, tvb,
 439                                 offset, NETSNYC_MERKLE_HASH_LENGTH, FALSE );
 440         offset += NETSNYC_MERKLE_HASH_LENGTH;
 441
 442         return offset;
 443 }
 444
 445 static guint
 446 get_netsync_pdu_len(tvbuff_t *tvb, int offset)
 447 {
 448         guint size = 0, size_bytes;
 449
 450         /* skip version and command */
 451         offset += 2;
 452
 453         size_bytes = dissect_uleb128( tvb, offset, &size );
 454
 455         /* the calculated size if for the data only, this doesn't
 456          * include the version (1 byte), command (1 byte),
 457          * lenght (size_bytes bytes) and checksum (4 bytes)
 458          */
 459
 460         return 1 + 1 + size_bytes + size + 4;
 461 }
 462
 463 static void
 464 dissect_netsync_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 465 {
 466         gint offset = 0;
 467         guint8 tmp;
 468         guint8 cmd, version;
 469         guint32 size, size_bytes, shift;
 470         proto_tree *ti,*netsync_tree=NULL;
 471
 472         /* Set the protocol column */
 473         if (check_col(pinfo->cinfo,COL_PROTOCOL)) {
 474                 col_set_str(pinfo->cinfo,COL_PROTOCOL,"Netsync");
 475         }
 476
 477
 478         if (tree == NULL)
 479                 return;
 480
 481         while (tvb_reported_length_remaining(tvb, offset)  > 0) {
 482                 ti = proto_tree_add_item(tree, proto_netsync, tvb, offset, -1, FALSE);
 483                 netsync_tree = proto_item_add_subtree(ti, ett_netsync);
 484
 485                 version = tvb_get_guint8(tvb, offset);
 486                 proto_tree_add_item(netsync_tree, hf_netsync_version, tvb,
 487                                         offset, 1, FALSE );
 488                 offset += 1;
 489
 490                 cmd = tvb_get_guint8(tvb, offset);
 491                 proto_tree_add_item(netsync_tree, hf_netsync_command, tvb,
 492                                         offset, 1, FALSE );
 493                 offset += 1;
 494
 495
 496                 /* get size */
 497                 size = 0;
 498                 size_bytes = 0;
 499                 shift = 0;
 500                 do {
 501                         tmp = tvb_get_guint8(tvb, offset + size_bytes);
 502                         size_bytes += 1;
 503
 504                         size |= (tmp & 0x7F) << shift;
 505                         shift += 7;
 506                 } while (tmp & 0x80);
 507
 508
 509                 proto_tree_add_uint(netsync_tree, hf_netsync_size, tvb,
 510                                         offset, size_bytes, size );
 511                 offset += size_bytes;
 512
 513                 switch (cmd) {
 514                         case NETSYNC_CMD_DONE:
 515                                 dissect_netsync_cmd_done( tvb, offset, netsync_tree, size );
 516                                 break;
 517
 518                         case NETSYNC_CMD_ERROR:
 519                                 dissect_netsync_cmd_error( tvb, offset, netsync_tree, size );
 520                                 break;
 521
 522                         case NETSYNC_CMD_BYE:
 523                                 dissect_netsync_cmd_bye( tvb, offset, netsync_tree, size );
 524                                 break;
 525
 526                         case NETSYNC_CMD_HELLO:
 527                                 dissect_netsync_cmd_hello( tvb, offset, netsync_tree, size );
 528                                 break;
 529
 530                         case NETSYNC_CMD_ANONYMOUS:
 531                                 dissect_netsync_cmd_anonymous( tvb, offset, netsync_tree, size );
 532                                 break;
 533
 534                         case NETSYNC_CMD_AUTH:
 535                                 dissect_netsync_cmd_auth( tvb, offset, netsync_tree, size );
 536                                 break;
 537
 538                         case NETSYNC_CMD_CONFIRM:
 539                                 dissect_netsync_cmd_confirm( tvb, offset, netsync_tree, size );
 540                                 break;
 541
 542                         case NETSYNC_CMD_REFINE:
 543                                 dissect_netsync_cmd_refine( tvb, offset, netsync_tree, size );
 544                                 break;
 545
 546                         case NETSYNC_CMD_SEND_DATA:
 547                                 dissect_netsync_cmd_send_data( tvb, offset, netsync_tree, size );
 548                                 break;
 549
 550                         case NETSYNC_CMD_SEND_DELTA:
 551                                 dissect_netsync_cmd_send_delta( tvb, offset, netsync_tree, size );
 552                                 break;
 553
 554                         case NETSYNC_CMD_DATA:
 555                                 dissect_netsync_cmd_data( tvb, offset, netsync_tree, size );
 556                                 break;
 557
 558                         case NETSYNC_CMD_DELTA:
 559                                 dissect_netsync_cmd_delta( tvb, offset, netsync_tree, size );
 560                                 break;
 561
 562                         case NETSYNC_CMD_NONEXISTANT:
 563                                 dissect_netsync_cmd_nonexistant( tvb, offset, netsync_tree, size );
 564                                 break;
 565
 566                         default:
 567                                 proto_tree_add_item(netsync_tree, hf_netsync_data, tvb,
 568                                         offset, size, FALSE );
 569                                 break;
 570                 }
 571
 572                 offset += size;
 573
 574                 proto_tree_add_item(netsync_tree, hf_netsync_checksum, tvb,
 575                                         offset, 4, FALSE );
 576                 offset += 4;
 577
 578
 579                 proto_item_append_text(netsync_tree, " V%d, Cmd: %s (%d), Size: %d",
 580                                         version, val_to_str(cmd, netsync_cmd_vals, "(0x%x)"), cmd, size );
 581
 582                 proto_item_set_len(netsync_tree, 1+1+size_bytes+size+4);
 583         }
 584 }
 585
 586 static void
 587 dissect_netsync(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 588 {
 589         tcp_dissect_pdus(tvb, pinfo, tree, netsync_desegment, 7, get_netsync_pdu_len,
 590                                         dissect_netsync_pdu);
 591 }
 592
 593 void
 594 proto_register_netsync(void)
 595 {
 596         static hf_register_info hf[] = {
 597                 /* General */
 598                 { &hf_netsync_version,
 599                         { "Version", "netsync.version",
 600                           FT_UINT8, BASE_DEC, NULL, 0x0,
 601                           "Version", HFILL } },
 602                 { &hf_netsync_command,
 603                         { "Command", "netsync.command",
 604                           FT_UINT8, BASE_HEX, VALS(netsync_cmd_vals), 0x0,
 605                           "Command", HFILL } },
 606                 { &hf_netsync_size,
 607                         { "Size", "netsync.size",
 608                           FT_UINT32, BASE_DEC, NULL, 0x0,
 609                           "Size", HFILL } },
 610                 { &hf_netsync_data,
 611                         { "Data", "netsync.data",
 612                           FT_BYTES, BASE_HEX, NULL, 0x0,
 613                           "Data", HFILL } },
 614                 { &hf_netsync_checksum,
 615                         { "Checksum", "netsync.checksum",
 616                           FT_UINT32, BASE_HEX, NULL, 0x0,
 617                           "Checksum", HFILL } },
 618                 { &hf_netsync_cmd_hello_keyname,
 619                         { "Key Name", "netsync.cmd.hello.keyname",
 620                           FT_STRING, BASE_HEX, NULL, 0x0,
 621                           "Key Name", HFILL } },
 622                 { &hf_netsync_cmd_hello_key,
 623                         { "Key", "netsync.cmd.hello.key",
 624                           FT_BYTES, BASE_HEX, NULL, 0x0,
 625                           "Key", HFILL } },
 626                 { &hf_netsync_cmd_nonce,
 627                         { "Nonce", "netsync.cmd.nonce",
 628                           FT_BYTES, BASE_HEX, NULL, 0x0,
 629                           "Nonce", HFILL } },
 630                 { &hf_netsync_cmd_anonymous_role,
 631                         { "Role", "netsync.cmd.anonymous.role",
 632                           FT_UINT8, BASE_DEC, VALS(netsync_role_vals), 0x0,
 633                           "Role", HFILL } },
 634                 { &hf_netsync_cmd_anonymous_collection,
 635                         { "Collection", "netsync.cmd.anonymous.collection",
 636                           FT_STRING, BASE_DEC, NULL, 0x0,
 637                           "Collection", HFILL } },
 638                 { &hf_netsync_cmd_confirm_sig,
 639                         { "Signature", "netsync.cmd.confirm.signature",
 640                           FT_BYTES, BASE_HEX, NULL, 0x0,
 641                           "Signature", HFILL } },
 642                 { &hf_netsync_cmd_send_data_type,
 643                         { "Type", "netsync.cmd.send_data.type",
 644                           FT_UINT8, BASE_DEC, NULL, 0x0,
 645                           "Type", HFILL } },
 646                 { &hf_netsync_cmd_send_data_id,
 647                         { "ID", "netsync.cmd.send_data.id",
 648                           FT_BYTES, BASE_HEX, NULL, 0x0,
 649                           "ID", HFILL } },
 650                 { &hf_netsync_cmd_error_msg,
 651                         { "Message", "netsync.cmd.error.msg",
 652                           FT_STRING, BASE_DEC, NULL, 0x0,
 653                           "Message", HFILL } },
 654
 655                 { &hf_netsync_cmd_done_level,
 656                         { "Level", "netsync.cmd.done.level",
 657                           FT_UINT32, BASE_DEC, NULL, 0x0,
 658                           "Level", HFILL } },
 659                 { &hf_netsync_cmd_auth_role,
 660                         { "Role", "netsync.cmd.auth.role",
 661                           FT_UINT8, BASE_DEC, VALS(netsync_role_vals), 0x0,
 662                           "Role", HFILL } },
 663                 { &hf_netsync_cmd_auth_collection,
 664                         { "Collection", "netsync.cmd.auth.collection",
 665                           FT_STRING, BASE_DEC, NULL, 0x0,
 666                           "Collection", HFILL } },
 667                 { &hf_netsync_cmd_auth_id,
 668                         { "ID", "netsync.cmd.auth.id",
 669                           FT_BYTES, BASE_DEC, NULL, 0x0,
 670                           "ID", HFILL } },
 671                 { &hf_netsync_cmd_auth_nonce1,
 672                         { "Nonce 1", "netsync.cmd.auth.nonce1",
 673                           FT_BYTES, BASE_DEC, NULL, 0x0,
 674                           "Nonce 1", HFILL } },
 675                 { &hf_netsync_cmd_auth_nonce2,
 676                         { "Nonce 2", "netsync.cmd.auth.nonce2",
 677                           FT_BYTES, BASE_DEC, NULL, 0x0,
 678                           "Nonce 2", HFILL } },
 679                 { &hf_netsync_cmd_auth_sig,
 680                         { "Signature", "netsync.cmd.auth.sig",
 681                           FT_BYTES, BASE_DEC, NULL, 0x0,
 682                           "Signature", HFILL } },
 683                 { &hf_netsync_cmd_data_type,
 684                         { "Type", "netsync.cmd.data.type",
 685                           FT_UINT8, BASE_DEC, NULL, 0x0,
 686                           "Type", HFILL } },
 687                 { &hf_netsync_cmd_data_id,
 688                         { "ID", "netsync.cmd.data.id",
 689                           FT_BYTES, BASE_DEC, NULL, 0x0,
 690                           "ID", HFILL } },
 691                 { &hf_netsync_cmd_data_compressed,
 692                         { "Compressed", "netsync.cmd.data.compressed",
 693                           FT_UINT8, BASE_DEC, NULL, 0x0,
 694                           "Compressed", HFILL } },
 695                 { &hf_netsync_cmd_data_payload,
 696                         { "Payload", "netsync.cmd.data.payload",
 697                           FT_BYTES, BASE_DEC, NULL, 0x0,
 698                           "Payload", HFILL } },
 699                 { &hf_netsync_cmd_delta_type,
 700                         { "Type", "netsync.cmd.delta.type",
 701                           FT_UINT8, BASE_DEC, NULL, 0x0,
 702                           "Type", HFILL } },
 703                 { &hf_netsync_cmd_delta_base_id,
 704                         { "Base ID", "netsync.cmd.delta.base_id",
 705                           FT_BYTES, BASE_DEC, NULL, 0x0,
 706                           "Base ID", HFILL } },
 707                 { &hf_netsync_cmd_delta_ident_id,
 708                         { "Ident ID", "netsync.cmd.delta.ident_id",
 709                           FT_BYTES, BASE_DEC, NULL, 0x0,
 710                           "Ident ID", HFILL } },
 711                 { &hf_netsync_cmd_delta_compressed,
 712                         { "Compressed", "netsync.cmd.delta.compressed",
 713                           FT_UINT8, BASE_DEC, NULL, 0x0,
 714                           "Compressed", HFILL } },
 715                 { &hf_netsync_cmd_delta_payload,
 716                         { "Payload", "netsync.cmd.delta.payload",
 717                           FT_BYTES, BASE_DEC, NULL, 0x0,
 718                           "Payload", HFILL } },
 719                 { &hf_netsync_cmd_refine_tree_node,
 720                         { "Tree Node", "netsync.cmd.refine.tree_node",
 721                           FT_BYTES, BASE_DEC, NULL, 0x0,
 722                           "Tree Node", HFILL } },
 723                 { &hf_netsync_cmd_send_delta_type,
 724                         { "Type", "netsync.cmd.send_delta.type",
 725                           FT_UINT8, BASE_DEC, NULL, 0x0,
 726                           "Type", HFILL } },
 727                 { &hf_netsync_cmd_send_delta_base_id,
 728                         { "Base ID", "netsync.cmd.send_delta.base_id",
 729                           FT_BYTES, BASE_DEC, NULL, 0x0,
 730                           "Base ID", HFILL } },
 731                 { &hf_netsync_cmd_send_delta_ident_id,
 732                         { "Ident ID", "netsync.cmd.send_delta.ident_id",
 733                           FT_BYTES, BASE_DEC, NULL, 0x0,
 734                           "Ident ID", HFILL } },
 735                 { &hf_netsync_cmd_nonexistant_id,
 736                         { "ID", "netsync.cmd.nonexistant.id",
 737                           FT_BYTES, BASE_DEC, NULL, 0x0,
 738                           "ID", HFILL } },
 739                 { &hf_netsync_cmd_nonexistant_type,
 740                         { "Type", "netsync.cmd.nonexistant.type",
 741                           FT_UINT8, BASE_DEC, NULL, 0x0,
 742                           "Type", HFILL } },
 743                 { &hf_netsync_cmd_done_type,
 744                         { "Type", "netsync.cmd.done.type",
 745                           FT_UINT8, BASE_DEC, NULL, 0x0,
 746                           "Type", HFILL } }
 747
 748
 749         };
 750
 751         static gint *ett[] = {
 752                 &ett_netsync,
 753         };
 754
 755         module_t *netsync_module;
 756
 757         proto_netsync = proto_register_protocol("Monotone Netsync", "Netsync", "netsync");
 758         proto_register_field_array(proto_netsync, hf, array_length(hf));
 759         proto_register_subtree_array(ett, array_length(ett));
 760
 761         netsync_handle = create_dissector_handle(dissect_netsync, proto_netsync);
 762
 763         netsync_module = prefs_register_protocol(proto_netsync,
 764                                                 proto_reg_handoff_netsync);
 765
 766         prefs_register_uint_preference(netsync_module, "tcp_port",
 767                                         "Monotone Netsync TCP Port",
 768                                         "The TCP port on which Monotone Netsync packets will be sent",
 769                                         10, &global_tcp_port_netsync);
 770
 771
 772         prefs_register_bool_preference(netsync_module, "desegment_netsync_messages",
 773                 "Reassemble Netsync messages spanning multiple TCP segments",
 774                 "Whether the Netsync dissector should reassemble messages spanning multiple TCP segments."
 775                 " To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
 776                 &netsync_desegment);
 777
 778 }
 779
 780 void
 781 proto_reg_handoff_netsync(void)
 782 {
 783         static gint initialized = 0;
 784
 785         if (initialized) {
 786                 dissector_delete("tcp.port", tcp_port_netsync, netsync_handle);
 787         } else {
 788                 initialized = 1;
 789         }
 790
 791         tcp_port_netsync = global_tcp_port_netsync;
 792         dissector_add("tcp.port", global_tcp_port_netsync, netsync_handle);
 793 }
 794