packet-msproxy.c

   1 /* packet-rlogin.c
   2  * Routines for Microsoft Proxy packet dissection
   3  * Copyright 2000, Jeffrey C. Foster <jfoste@woodward.com>
   4  *
   5  * $Id: packet-msproxy.c,v 1.8 2000/08/11 13:35:11 deniel Exp $
   6  *
   7  * Ethereal - Network traffic analyzer
   8  * By Gerald Combs <gerald@zing.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  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  * This was derived from the dante socks implimentation source code.
  28  * Most of the information came from common.h and msproxy_clientprotocol.c
  29  *
  30  * See http://www.inet.no/dante for more information
  31  *
  32  */
  33
  34 /************************************************************************
  35  *                                                                      *
  36  *  Notes: These are possible command values. User input is welcome     *
  37  *                                                                      *
  38  *  Command = 0x040a - Remote host closed connection (maybe ?? )        *
  39  *  Command = 0x0411 - Remote host closed connection                    *
  40  *  Command = 0x0413 - Local host closed connection or SYN worked       *
  41  *                                                                      *
  42  ************************************************************************/
  43
  44
  45
  46
  47 #ifdef HAVE_CONFIG_H
  48 # include "config.h"
  49 #endif
  50
  51 #ifdef HAVE_SYS_TYPES_H
  52 # include <sys/types.h>
  53 #endif
  54
  55 #ifdef HAVE_NETINET_IN_H
  56 # include <netinet/in.h>
  57 #endif
  58
  59 #include <stdio.h>
  60 #include <string.h>
  61 #include <glib.h>
  62
  63 #ifdef NEED_SNPRINTF_H
  64 # include "snprintf.h"
  65 #endif
  66
  67 #include "packet.h"
  68 #include "resolv.h"
  69 #include "globals.h"
  70 #include "alignment.h"
  71 #include "conversation.h"
  72
  73 #include "packet-tcp.h"
  74 #include "packet-udp.h"
  75
  76 #define CHECK_PACKET_LENGTH(X) if (!BYTES_ARE_IN_FRAME(offset, X)){  \
  77         proto_tree_add_text(tree, NullTVB, offset, 0, "****FRAME TOO SHORT***"); return;}
  78
  79 extern void udp_hash_add(guint16 proto,
  80         void (*dissect)(const u_char *, int, frame_data *, proto_tree *));
  81
  82
  83 static int proto_msproxy = -1;
  84
  85 static int ett_msproxy = -1;
  86 static int ett_msproxy_name = -1;
  87
  88 static int hf_msproxy_cmd = -1;
  89 static int hf_msproxy_clntport = -1;
  90
  91 static int hf_msproxy_dstaddr = -1;
  92
  93 static int hf_msproxy_srcport = -1;
  94 static int hf_msproxy_dstport = -1;
  95 static int hf_msproxy_serverport = -1;
  96 static int hf_msproxy_serveraddr = -1;
  97 static int hf_msproxy_bindport = -1;
  98 static int hf_msproxy_bindaddr = -1;
  99 static int hf_msproxy_boundport = -1;
 100 static int hf_msproxy_bind_id = -1;
 101 static int hf_msproxy_resolvaddr = -1;
 102
 103 static int hf_msproxy_server_int_addr = -1;
 104 static int hf_msproxy_server_int_port = -1;
 105 static int hf_msproxy_server_ext_addr = -1;
 106 static int hf_msproxy_server_ext_port = -1;
 107
 108
 109 #define UDP_PORT_MSPROXY 1745
 110
 111 #define N_MSPROXY_HELLO                 0x05    /* packet 1 from client */
 112 #define N_MSPROXY_ACK                   0x10    /* packet 1 from server */
 113 #define N_MSPROXY_USERINFO_ACK          0x04    /* packet 2 from server */
 114 #define N_MSPROXY_AUTH                  0x47    /* packet 3 from client */
 115 #define N_MSPROXY_RESOLVE               0x07    /* Resolve request      */
 116
 117
 118 /*$$$ 0x0500 was dante value, I see 0x05ff and 0x0500 */
 119
 120 #define MSPROXY_HELLO                   0x0500
 121 #define MSPROXY_HELLO_2                 0x05ff
 122
 123 #define MSPROXY_HELLO_ACK               0x1000
 124
 125 #define MSPROXY_USERINFO                0x1000
 126 #define MSPROXY_USERINFO_ACK            0x0400
 127
 128 #define MSPROXY_AUTH                    0x4700
 129 #define MSPROXY_AUTH_1_ACK              0x4714
 130 #define MSPROXY_AUTH_2                  0x4701
 131 #define MSPROXY_AUTH_2_ACK              0x4715
 132 #define MSPROXY_AUTH_2_ACK2             0x4716
 133
 134 #define MSPROXY_RESOLVE                 0x070d
 135 #define MSPROXY_RESOLVE_ACK             0x070f
 136
 137 #define MSPROXY_BIND                    0x0704
 138 #define MSPROXY_BIND_ACK                0x0706
 139
 140 #define MSPROXY_TCP_BIND                0x0707
 141 #define MSPROXY_TCP_BIND_ACK            0x0708
 142
 143 #define MSPROXY_LISTEN                  0x0406
 144
 145 #define MSPROXY_BINDINFO                0x0709
 146
 147 #define MSPROXY_BINDINFO_ACK            0x070a
 148
 149 #define MSPROXY_CONNECT                 0x071e
 150 #define MSPROXY_CONNECT_ACK             0x0703
 151
 152 #define MSPROXY_UDPASSOCIATE            0x0705
 153 #define MSPROXY_UDPASSOCIATE_ACK        0x0706
 154
 155 #define MSPROXY_UDP_BIND_REQ            0x070b
 156
 157 #define MSPROXY_CONNECTED               0x042c
 158 #define MSPROXY_SESSIONEND              0x251e
 159
 160 #define MSPROXY_BIND_AUTHFAILED         0x0804
 161 #define MSPROXY_CONNECT_AUTHFAILED      0x081e
 162 #define MSPROXY_CONNREFUSED             0x4             /* low 12 bits seem to vary.    */
 163
 164 #define FROM_SERVER 1                   /* direction of packet data for get_msproxy_cmd_name */
 165 #define FROM_CLIENT 0
 166
 167
 168
 169
 170 /*$$$ should this be the same as redirect_entry_t ?? */
 171 /*  then the add_conversation could just copy the structure */
 172 /* using the same allocation (instance  for you object guys)    */
 173 /* wouldn't work because there may be multiple child conversations */
 174 /* from the same MSProxy conversation */
 175
 176 typedef struct {
 177         guint32 dst_addr;
 178         guint32 clnt_port;
 179         guint32 dst_port;
 180         guint32 server_int_port;
 181         int     proto;
 182 }hash_entry_t;
 183
 184
 185 /************** conversation hash stuff ***************/
 186
 187 #define hash_init_count 20
 188 #define hash_val_length (sizeof(hash_entry_t))
 189
 190 static GMemChunk *vals = NULL;
 191
 192 typedef struct {
 193         guint32 remote_addr;
 194         guint32 clnt_port;
 195         guint32 server_int_port;
 196         guint32 remote_port;
 197         int     proto;
 198 }redirect_entry_t;
 199
 200
 201 /************** negotiated conversation hash stuff ***************/
 202
 203 #define redirect_init_count 20
 204 #define redirect_val_length (sizeof(redirect_entry_t))
 205
 206 static GMemChunk *redirect_vals = NULL;
 207
 208
 209 static guint32 last_row= 0;     /* used to see if packet is new */
 210
 211 static void msproxy_sub_dissector( const u_char *pd, int offset, frame_data *fd,
 212                 proto_tree *tree) {
 213
 214 /* Conversation dissector called from TCP or UDP dissector. Decode and  */
 215 /* display the socks header, the pass the rest of the data to the tcp   */
 216 /* or udp port decode routine to  handle the payload.                   */
 217
 218         guint32 *ptr;
 219         redirect_entry_t *redirect_info;
 220         conversation_t *conversation;
 221         proto_tree      *msp_tree;
 222         proto_item      *ti;
 223
 224         conversation = find_conversation( &pi.src, &pi.dst, pi.ptype,
 225                 pi.srcport, pi.destport);
 226
 227         g_assert( conversation);        /* should always find a conversation */
 228
 229         redirect_info = (redirect_entry_t*)conversation->data;
 230
 231         if (check_col(fd, COL_PROTOCOL))
 232                 col_add_str(fd, COL_PROTOCOL, "MS Proxy");
 233
 234         if (check_col(fd, COL_INFO))
 235                 col_add_fstr(fd, COL_INFO, "%s",
 236                         (( redirect_info->proto == PT_TCP) ? "TCP stream" :
 237                          "UDP packets"));
 238
 239         if ( tree) {
 240                 ti = proto_tree_add_item( tree, proto_msproxy, NullTVB, offset, 0,
 241                         FALSE );
 242
 243                 msp_tree = proto_item_add_subtree(ti, ett_msproxy);
 244
 245                 proto_tree_add_uint( msp_tree, hf_msproxy_dstport, NullTVB,
 246                         offset, 0, redirect_info->remote_port);
 247
 248                 proto_tree_add_ipv4( msp_tree, hf_msproxy_dstaddr, NullTVB, offset, 0,
 249                         redirect_info->remote_addr);
 250
 251         }
 252
 253 /* set pi src/dst port and call the udp sub-dissector lookup */
 254
 255         if ( pi.srcport == redirect_info->clnt_port)
 256                 ptr = &pi.destport;
 257         else
 258                 ptr = &pi.srcport;
 259
 260         *ptr = redirect_info->remote_port;
 261
 262         if ( redirect_info->proto == PT_TCP)
 263                 decode_tcp_ports( pd, offset, fd, tree, pi.srcport, pi.destport);
 264         else
 265                 decode_udp_ports( pd, offset, fd, tree, pi.srcport, pi.destport);
 266
 267         *ptr = redirect_info->server_int_port;
 268 }
 269
 270
 271
 272 static void add_msproxy_conversation( hash_entry_t *hash_info){
 273
 274 /* check to see if a conversation already exists, if it does assume     */
 275 /* it's our conversation and quit. Otherwise create a new conversation. */
 276 /* Load the conversation dissector to our  dissector and load the       */
 277 /* conversation data structure with the info needed to call the TCP or  */
 278 /* UDP port decoder.                                                    */
 279
 280 /* NOTE: Currently this assume that the conversation will be created    */
 281 /*      during a packet from the server.  If that changes, the pi.src   */
 282 /*      and pi.dst will not be correct and this routine will have to    */
 283 /*      change.                                                         */
 284
 285         redirect_entry_t *new_conv_info;
 286
 287         conversation_t *conversation = find_conversation( &pi.src, &pi.dst,
 288                 hash_info->proto, hash_info->server_int_port,
 289                 hash_info->clnt_port);
 290
 291         if ( conversation)
 292                 return;
 293
 294         new_conv_info = g_mem_chunk_alloc(redirect_vals);
 295         conversation = conversation_new( &pi.src, &pi.dst, hash_info->proto,
 296                 hash_info->server_int_port, hash_info->clnt_port, new_conv_info);
 297
 298         g_assert( new_conv_info);
 299         g_assert( conversation);
 300
 301         new_conv_info->remote_addr = hash_info->dst_addr;
 302         new_conv_info->clnt_port = hash_info->clnt_port;
 303         new_conv_info->remote_port = hash_info->dst_port;
 304         new_conv_info->server_int_port = hash_info->server_int_port;
 305         new_conv_info->proto = hash_info->proto;
 306
 307         conversation->is_old_dissector = TRUE;
 308         conversation->dissector.old = msproxy_sub_dissector;
 309 }
 310
 311
 312
 313 static int display_application_name(const u_char *pd, int offset,
 314         frame_data *fd, proto_tree *tree) {
 315
 316 /* display the application name in the proto tree.                      */
 317
 318 /* NOTE: this routine assumes that the tree pointer is valid (not NULL) */
 319
 320         char temp[255];
 321
 322         if (!IS_DATA_IN_FRAME(offset)){
 323                 proto_tree_add_text(tree, NullTVB, offset, 0, "****FRAME TOO SHORT***");
 324                 return 0;
 325         }
 326
 327         strncpy( temp, &pd[ offset], MIN( 255, END_OF_FRAME));
 328         temp[ MIN( 255, END_OF_FRAME)] = 0;
 329         proto_tree_add_text( tree, NullTVB, offset, strlen(temp), "Application: %s", temp);
 330
 331         return strlen(temp);
 332
 333 }
 334
 335
 336 static char *get_msproxy_cmd_name( int cmd, int direction) {
 337
 338 /* return the command name string for cmd */
 339
 340         switch (cmd){
 341                 case MSPROXY_HELLO_2:
 342                 case MSPROXY_HELLO:             return "Hello";
 343
 344 /* MSPROXY_HELLO_ACK & MSPROXY_USERINFO have the same value (0x1000).   */
 345 /* So use the direction flag to determine which to use.                 */
 346
 347                 case MSPROXY_USERINFO:
 348                         if ( direction == FROM_SERVER)
 349                                 return "Hello Acknowledge";
 350                         else
 351                                 return "User Info";
 352                 case MSPROXY_USERINFO_ACK:      return "User Info Acknowledge";
 353                 case MSPROXY_AUTH:              return "Authentication";
 354                 case MSPROXY_AUTH_1_ACK:        return "Authentication Acknowledge";
 355                 case MSPROXY_AUTH_2:            return "Authentication 2";
 356                 case MSPROXY_AUTH_2_ACK:        return "Authentication 2 Acknowledge";
 357                 case MSPROXY_RESOLVE:           return "Resolve";
 358                 case MSPROXY_RESOLVE_ACK:       return "Resolve Acknowledge";
 359                 case MSPROXY_BIND:              return "Bind";
 360                 case MSPROXY_TCP_BIND:          return "TCP Bind";
 361                 case MSPROXY_TCP_BIND_ACK:      return "TCP Bind Acknowledge";
 362                 case MSPROXY_LISTEN:            return "Listen";
 363                 case MSPROXY_BINDINFO:          return "Bind Info";
 364                 case MSPROXY_BINDINFO_ACK:      return "Bind Info Acknowledge";
 365                 case MSPROXY_CONNECT:           return "Connect";
 366                 case MSPROXY_CONNECT_ACK:       return "Connect Acknowledge";
 367                 case MSPROXY_UDPASSOCIATE:      return "UDP Associate";
 368                 case MSPROXY_UDP_BIND_REQ:      return "UDP Bind";
 369                 case MSPROXY_UDPASSOCIATE_ACK:  return "Bind or Associate Acknowledge";
 370                 case MSPROXY_CONNECTED:         return "Connected";
 371                 case MSPROXY_SESSIONEND:        return "Session End";
 372
 373                 default:                        return "Unknown";
 374         }
 375 }
 376
 377
 378
 379 static void dissect_user_info_2(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
 380
 381 /* decode the user, application, computer name  */
 382
 383
 384         char str[ 255];
 385
 386         if ( tree) {
 387                 strncpy( str, &pd[ offset], MIN( 255, END_OF_FRAME));
 388                 str[ MIN( 255, END_OF_FRAME)] = 0;
 389
 390                 proto_tree_add_text( tree, NullTVB, offset, strlen( str) + 1,
 391                         "User name: %s", str);
 392                 offset += strlen( str) + 2;
 393
 394                 strncpy( str, &pd[ offset], MIN( 255, END_OF_FRAME));
 395                 str[ MIN( 255, END_OF_FRAME)] = 0;
 396
 397                 proto_tree_add_text( tree, NullTVB, offset, strlen( str) + 1,
 398                         "Application name: %s", str);
 399                 offset += strlen( str) + 1;
 400
 401                 strncpy( str, &pd[ offset], MIN( 255, END_OF_FRAME));
 402                 str[ MIN( 255, END_OF_FRAME)] = 0;
 403
 404                 proto_tree_add_text( tree, NullTVB, offset, strlen( str) + 1,
 405                         "Client computer name: %s", str);
 406         }
 407 }
 408
 409
 410
 411 static void dissect_msproxy_request_1(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
 412
 413 /* decode the request _1 structure  */
 414
 415
 416         offset += 180;
 417
 418         dissect_user_info_2( pd, 262, fd, tree);
 419
 420 }
 421
 422
 423
 424 static void dissect_bind(const u_char *pd, int offset, frame_data *fd,
 425          proto_tree *tree, hash_entry_t *conv_info) {
 426
 427 /* decode the bind request   */
 428
 429         offset += 18;
 430
 431         CHECK_PACKET_LENGTH( 4);
 432         if ( tree)
 433                 proto_tree_add_ipv4( tree, hf_msproxy_bindaddr, NullTVB, offset, 4,
 434                         GWORD( pd, offset));
 435         offset += 4;
 436
 437         CHECK_PACKET_LENGTH( 2);
 438         if ( tree)
 439                 proto_tree_add_uint( tree, hf_msproxy_bindport, NullTVB, offset, 2,
 440                          pntohs( &pd[ offset]));
 441         offset += 6;
 442
 443         CHECK_PACKET_LENGTH( 2);
 444         if ( tree)
 445                 proto_tree_add_uint( tree, hf_msproxy_clntport, NullTVB, offset, 2,
 446                          pntohs( &pd[ offset]));
 447         offset += 2;
 448
 449         conv_info->clnt_port = pntohs( &pd[ offset]);
 450         offset += 6;
 451
 452         if ( tree){
 453                 CHECK_PACKET_LENGTH( 2);
 454                 proto_tree_add_uint( tree, hf_msproxy_boundport, NullTVB, offset, 2,
 455                         pntohs( &pd[ offset]));
 456
 457                 offset += 82;
 458                 display_application_name( pd, offset, fd, tree);
 459         }
 460 }
 461
 462
 463
 464 static void dissect_auth(const u_char *pd, int offset,
 465         frame_data *fd, proto_tree *tree) {
 466
 467 /* decode the authorization request  */
 468
 469         char temp[255];
 470
 471         if ( tree) {
 472                 offset += 134;
 473
 474                 strncpy( temp, &pd[ offset], 7);
 475                 temp[ 7] = 0;
 476                 proto_tree_add_text( tree, NullTVB, offset, 7, "NTLMSSP signature: %s",
 477                         temp);
 478                 offset += 7;
 479         }
 480 }
 481
 482
 483
 484 static void dissect_tcp_bind(const u_char *pd, int offset,
 485         frame_data *fd, proto_tree *tree, hash_entry_t *conv_info) {
 486
 487 /* decode the bind packet. Set the protocol type in the conversation    */
 488 /* information so the bind_info can use it to create the payload        */
 489 /* dissector.                                                           */
 490
 491
 492         conv_info->proto = PT_TCP;
 493
 494         if ( tree) {
 495                 offset += 6;
 496
 497                 CHECK_PACKET_LENGTH( 4);
 498                 proto_tree_add_uint( tree, hf_msproxy_bind_id, NullTVB, offset, 4, pntohl( &pd[ offset]));
 499                 offset += 16;
 500
 501                 CHECK_PACKET_LENGTH( 2);
 502                 proto_tree_add_uint( tree, hf_msproxy_boundport, NullTVB, offset, 2,
 503                         pntohs( &pd[ offset]));
 504
 505                 offset += 96;
 506                 display_application_name( pd, offset, fd, tree);
 507         }
 508 }
 509
 510
 511 static void dissect_request_connect(const u_char *pd, int offset, frame_data *fd,
 512                 proto_tree *tree, hash_entry_t *conv_info) {
 513
 514 /* decode the connect request, display  */
 515
 516         conv_info->proto = PT_TCP;
 517
 518         offset += 20;
 519
 520         CHECK_PACKET_LENGTH( 2);
 521         if ( tree)
 522                 proto_tree_add_uint( tree, hf_msproxy_dstport, NullTVB, offset, 2,
 523                         pntohs( &pd[ offset]));
 524
 525         conv_info->dst_port = pntohs( &pd[ offset]);
 526         offset += 2;
 527
 528         CHECK_PACKET_LENGTH( 4);
 529         if ( tree)
 530                 proto_tree_add_ipv4( tree, hf_msproxy_dstaddr, NullTVB, offset, 4,
 531                         GWORD( pd, offset));
 532
 533         memcpy( &conv_info->dst_addr, &pd[ offset], sizeof( guint32));
 534
 535         offset += 12;
 536
 537         CHECK_PACKET_LENGTH( 2);
 538         conv_info->clnt_port = pntohs( &pd[ offset]);
 539
 540         if ( tree){
 541                 proto_tree_add_uint( tree, hf_msproxy_clntport, NullTVB, offset, 2,
 542                         pntohs( &pd[ offset]));
 543
 544                 offset += 84;
 545
 546                 display_application_name( pd, offset, fd, tree);
 547         }
 548 }
 549
 550
 551 static void dissect_bind_info_ack(const u_char *pd, int offset, frame_data *fd,
 552         proto_tree *tree, hash_entry_t *conv_info) {
 553
 554 /* decode the client bind info ack  */
 555
 556
 557         if ( tree){
 558                 offset += 6;
 559
 560                 CHECK_PACKET_LENGTH( 4);
 561                 proto_tree_add_uint( tree, hf_msproxy_bind_id, NullTVB, offset, 4, pntohl( &pd[ offset]));
 562                 offset += 14;
 563
 564                 CHECK_PACKET_LENGTH( 2);
 565                 proto_tree_add_uint( tree, hf_msproxy_dstport, NullTVB, offset, 2,
 566                         pntohs( &pd[ offset]));
 567                 offset += 2;
 568
 569                 CHECK_PACKET_LENGTH( 4);
 570                 proto_tree_add_ipv4( tree, hf_msproxy_dstaddr, NullTVB, offset, 4,
 571                         GWORD( pd, offset));
 572                 offset += 12;
 573
 574                 CHECK_PACKET_LENGTH( 2);
 575                 proto_tree_add_uint( tree, hf_msproxy_server_int_port, NullTVB, offset,
 576                         2, pntohs( &pd[ offset]));
 577                 offset += 4;
 578
 579                 CHECK_PACKET_LENGTH( 2);
 580                 proto_tree_add_uint( tree, hf_msproxy_server_ext_port, NullTVB, offset,
 581                         2, pntohs( &pd[ offset]));
 582                 offset += 2;
 583
 584                 CHECK_PACKET_LENGTH( 4);
 585                 proto_tree_add_ipv4( tree, hf_msproxy_server_ext_addr, NullTVB, offset,
 586                         4, GWORD( pd, offset));
 587
 588                 offset += 78;
 589                 display_application_name( pd, offset, fd, tree);
 590         }
 591 }
 592
 593
 594 static void dissect_request_resolve(const u_char *pd, int offset,
 595         frame_data *fd, proto_tree *tree) {
 596
 597 /* dissect the request resolve structure */
 598 /* display a string with a length, characters encoding */
 599 /* they are displayed under a tree with the name in Label variable */
 600 /* return the length of the string and the length byte */
 601
 602         proto_tree      *name_tree;
 603         proto_item      *ti;
 604
 605         char temp[ 256];
 606         int length = GBYTE( pd, offset);
 607
 608         if ( tree){
 609                 strncpy( temp, &pd[ offset + 18], length);
 610                 temp[ length ] = 0;
 611
 612                 ti = proto_tree_add_text(tree, NullTVB, offset, length + 1,
 613                         "Host Name: %s", temp);
 614
 615                 name_tree = proto_item_add_subtree(ti, ett_msproxy_name);
 616
 617                 proto_tree_add_text( name_tree, NullTVB, offset, 1, "Length: %d", length);
 618
 619                 ++offset;
 620                 offset += 17;
 621
 622                 proto_tree_add_text( name_tree, NullTVB, offset, length, "String: %s",
 623                         temp);
 624         }
 625 }
 626
 627
 628
 629 static void dissect_udp_bind(const u_char *pd, int offset,
 630         frame_data *fd, proto_tree *tree, hash_entry_t *conv_info) {
 631
 632 /* Dissect the udp bind request.  Load the protocol id (PT_UDP) and the */
 633 /* remote address so bind_info can use it to create conversation        */
 634 /* dissector.                                                           */
 635
 636         conv_info->proto = PT_UDP;
 637
 638
 639         offset += 8;
 640
 641         CHECK_PACKET_LENGTH( 4);
 642         if ( tree)
 643                 proto_tree_add_uint( tree, hf_msproxy_bind_id, NullTVB, offset, 4, pntohl( &pd[ offset]));
 644         offset += 12;
 645
 646
 647         CHECK_PACKET_LENGTH( 2);
 648         if ( tree)
 649                 proto_tree_add_uint( tree, hf_msproxy_dstport, NullTVB, offset, 2,
 650                         pntohs( &pd[ offset]));
 651         offset += 2;
 652
 653         CHECK_PACKET_LENGTH( 4);
 654         if ( tree)
 655                 proto_tree_add_ipv4( tree, hf_msproxy_dstaddr, NullTVB, offset, 4,
 656                         GWORD( pd, offset));
 657
 658         offset += 96;
 659
 660         if ( tree)
 661                 display_application_name( pd, offset, fd, tree);
 662 }
 663
 664
 665 static void dissect_udp_assoc(const u_char *pd, int offset,
 666         frame_data *fd, proto_tree *tree, hash_entry_t *conv_info) {
 667
 668 /* dissect the udp associate request. And load client port into         */
 669 /* conversation data structure for later.                               */
 670
 671
 672         offset += 28;
 673
 674         CHECK_PACKET_LENGTH( 2);
 675         if ( tree)
 676                 proto_tree_add_uint( tree, hf_msproxy_clntport, NullTVB, offset, 2,
 677                         pntohs( &pd[ offset]));
 678
 679         conv_info->clnt_port = pntohs( &pd[ offset]);
 680
 681         offset += 90;
 682
 683         if ( tree)
 684                 display_application_name( pd, offset, fd, tree);
 685
 686
 687 }
 688
 689
 690 static void dissect_msproxy_request(const u_char *pd, int offset, frame_data *fd,
 691         proto_tree *tree, hash_entry_t *conv_info) {
 692
 693         int cmd;
 694         char temp[ 255];
 695
 696         if ( tree) {
 697                 CHECK_PACKET_LENGTH( 4);
 698                 proto_tree_add_text( tree, NullTVB, offset, 4, "Client id: 0x%0x",
 699                         GWORD( pd, offset));
 700                 offset += 4;
 701
 702                 CHECK_PACKET_LENGTH( 4);
 703                 proto_tree_add_text( tree, NullTVB, offset, 4, "Version: 0x%04x",
 704                         GWORD( pd, offset));
 705                 offset += 4;
 706
 707                 CHECK_PACKET_LENGTH( 4);
 708                 proto_tree_add_text( tree, NullTVB, offset, 4, "Server id: 0x%0x",
 709                         GWORD( pd, offset));
 710                 offset += 4;
 711
 712                 CHECK_PACKET_LENGTH( 2);
 713                 proto_tree_add_text( tree, NullTVB, offset, 1, "Server ack: %u",
 714                         GBYTE( pd, offset));
 715                 offset += 4;
 716
 717                 CHECK_PACKET_LENGTH( 1);
 718                 proto_tree_add_text( tree, NullTVB, offset, 1, "Sequence Number: %u",
 719                         GBYTE( pd, offset));
 720                 offset += 8;
 721
 722                 CHECK_PACKET_LENGTH( 4);
 723                 strncpy( temp, &pd[ offset], 4);
 724                 temp[ 4] = 0;
 725                 proto_tree_add_text( tree, NullTVB, offset, 4, "RWSP signature: %s", temp);
 726                 offset += 12;
 727         }
 728         else                    /* no tree */
 729                 offset += 36;
 730
 731         CHECK_PACKET_LENGTH( 1);
 732         cmd = pntohs( &pd[offset]);
 733
 734         if ( tree)
 735                 proto_tree_add_uint_format( tree, hf_msproxy_cmd, NullTVB, offset, 2,
 736                         cmd, "Command: 0x%02x (%s)", cmd,
 737                         get_msproxy_cmd_name( cmd, FROM_CLIENT));
 738
 739         offset += 2;
 740
 741         switch (cmd){
 742                 case MSPROXY_AUTH:
 743                         dissect_auth( pd, offset, fd, tree);
 744                         break;
 745
 746                 case MSPROXY_BIND:
 747                         dissect_bind( pd, offset, fd, tree, conv_info);
 748
 749                         break;
 750                 case  MSPROXY_UDP_BIND_REQ:
 751                         dissect_udp_bind( pd, offset, fd, tree, conv_info);
 752                         break;
 753
 754                 case MSPROXY_AUTH_2:    /*$$ this is probably wrong place for this */
 755                 case MSPROXY_TCP_BIND:
 756                         dissect_tcp_bind( pd, offset, fd, tree, conv_info);
 757                         break;
 758
 759                 case MSPROXY_RESOLVE:
 760                         dissect_request_resolve( pd, offset, fd, tree);
 761                         break;
 762
 763                 case MSPROXY_CONNECT:
 764                 case MSPROXY_LISTEN:
 765                         dissect_request_connect( pd, offset, fd, tree,
 766                                 conv_info);
 767                         break;
 768
 769                 case MSPROXY_BINDINFO_ACK:
 770                         dissect_bind_info_ack( pd, offset, fd, tree, conv_info);
 771                         break;
 772
 773                 case MSPROXY_HELLO:
 774                 case MSPROXY_HELLO_2:
 775                         dissect_msproxy_request_1( pd, offset, fd, tree);
 776                         break;
 777
 778                 case  MSPROXY_UDPASSOCIATE:
 779                         dissect_udp_assoc( pd, offset, fd, tree, conv_info);
 780                         break;
 781                 default:
 782                         if ( tree)
 783                                 proto_tree_add_text( tree, NullTVB, offset, 0,
 784                                         "Unhandled request command (report this, please)");
 785         }
 786 }
 787
 788
 789
 790 static void dissect_hello_ack(const u_char *pd, int offset, frame_data *fd,
 791         proto_tree *tree, hash_entry_t *conv_info) {
 792
 793 /* decode the hello acknowledge packet  */
 794
 795         offset += 60;
 796
 797         if ( tree) {
 798                 CHECK_PACKET_LENGTH( 2);
 799                 proto_tree_add_uint( tree, hf_msproxy_serverport, NullTVB, offset, 2,
 800                          pntohs( &pd[ offset]));
 801                 offset += 2;
 802
 803                 CHECK_PACKET_LENGTH( 4);
 804                 proto_tree_add_ipv4( tree, hf_msproxy_serveraddr, NullTVB, offset, 4,
 805                         GWORD( pd, offset));
 806                 offset += 4;
 807         }
 808 }
 809
 810
 811
 812 static void dissect_user_info_ack(const u_char *pd, int offset,
 813         frame_data *fd, proto_tree *tree) {
 814
 815 /* decode the  response _2 structure  */
 816
 817         offset += 18;
 818
 819         offset += 2;
 820
 821 }
 822
 823
 824
 825 static void dissect_udpassociate_ack( const u_char *pd, int offset,
 826         frame_data *fd, proto_tree *tree) {
 827
 828
 829         offset += 6;
 830
 831         if ( tree) {
 832                 CHECK_PACKET_LENGTH( 4);
 833                 proto_tree_add_uint( tree, hf_msproxy_bind_id, NullTVB, offset, 4, pntohl( &pd[ offset]));
 834                 offset += 14;
 835
 836                 CHECK_PACKET_LENGTH( 2);
 837                 proto_tree_add_uint( tree, hf_msproxy_server_ext_port, NullTVB, offset, 2, pntohs( &pd[ offset]));
 838                 offset += 2;
 839
 840                 CHECK_PACKET_LENGTH( 4);
 841                 proto_tree_add_ipv4( tree, hf_msproxy_server_ext_addr, NullTVB, offset, 4, GWORD( pd, offset));
 842
 843                 offset += 96;
 844                 display_application_name( pd, offset, fd, tree);
 845         }
 846 }
 847
 848
 849
 850 static void dissect_auth_1_ack(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
 851
 852
 853         char temp[ 255];
 854
 855         offset += 134;
 856         if ( tree) {
 857
 858                 CHECK_PACKET_LENGTH( 7);
 859                 strncpy( temp, &pd[ offset], 7);
 860                 temp[ 7] = 0;
 861                 proto_tree_add_text( tree, NullTVB, offset, 7, "NTLMSSP signature: %s", temp);
 862                 offset += 48;
 863
 864                 strncpy( temp, &pd[ offset], MIN( 255, END_OF_FRAME));
 865                 temp[ MIN( 255, END_OF_FRAME)] = 0;
 866                 proto_tree_add_text( tree, NullTVB, offset, 255, "NT domain: %s", temp);
 867                 offset += 7;
 868         }
 869 }
 870
 871
 872
 873 static void dissect_msproxy_response_4( const u_char *pd, int offset,
 874         frame_data *fd, proto_tree *tree) {
 875
 876 /* decode the response _4 structure  */
 877
 878         offset += 134;
 879 }
 880
 881
 882
 883 static void dissect_connect_ack( const u_char *pd, int offset, frame_data *fd,
 884         proto_tree *tree, hash_entry_t *conv_info) {
 885
 886 /* decode the connect ack packet  */
 887         offset += 20;
 888
 889         CHECK_PACKET_LENGTH( 2);
 890
 891         if ( tree)
 892                 proto_tree_add_uint( tree, hf_msproxy_server_int_port, NullTVB, offset, 2, pntohs( &pd[ offset]));
 893
 894
 895         conv_info->proto = PT_TCP;
 896         conv_info->server_int_port = pntohs( &pd[ offset]);
 897         offset += 2;
 898
 899         if ( tree){
 900                 CHECK_PACKET_LENGTH( 2);
 901                 proto_tree_add_ipv4( tree, hf_msproxy_server_int_addr, NullTVB, offset, 2, GWORD( pd, offset));
 902                 offset += 14;
 903
 904                 CHECK_PACKET_LENGTH( 2);
 905                 proto_tree_add_uint( tree, hf_msproxy_server_ext_port, NullTVB, offset, 2, pntohs( &pd[ offset]));
 906                 offset += 2;
 907
 908                 CHECK_PACKET_LENGTH( 4);
 909                 proto_tree_add_ipv4( tree, hf_msproxy_server_ext_addr, NullTVB, offset, 4, GWORD( pd, offset));
 910                 offset += 80;
 911
 912                 display_application_name( pd, offset, fd, tree);
 913         }
 914
 915         add_msproxy_conversation( conv_info);
 916 }
 917
 918
 919
 920 static void dissect_tcp_bind_ack( const u_char *pd, int offset, frame_data *fd,
 921         proto_tree *tree) {
 922
 923 /* decode the tcp bind */
 924
 925         if ( tree) {
 926                 offset += 6;
 927
 928                 CHECK_PACKET_LENGTH( 4);
 929                 proto_tree_add_uint( tree, hf_msproxy_bind_id, NullTVB, offset, 4, pntohl( &pd[ offset]));
 930                 offset += 16;
 931
 932                 CHECK_PACKET_LENGTH( 2);
 933                 proto_tree_add_uint( tree, hf_msproxy_server_int_port, NullTVB, offset,
 934                         2, pntohs( &pd[ offset]));
 935                 offset += 6;
 936
 937                 CHECK_PACKET_LENGTH( 2);
 938                 proto_tree_add_uint( tree, hf_msproxy_server_ext_port, NullTVB, offset,
 939                         2, pntohs( &pd[ offset]));
 940                 offset += 2;
 941
 942                 CHECK_PACKET_LENGTH( 4);
 943                 proto_tree_add_ipv4( tree, hf_msproxy_server_ext_addr, NullTVB, offset,
 944                         4, GWORD( pd, offset));
 945
 946                 offset += 88;
 947
 948                 display_application_name( pd, offset, fd, tree);
 949         }
 950 }
 951
 952
 953
 954 static void dissect_bind_info( const u_char *pd, int offset, frame_data *fd,
 955         proto_tree *tree, hash_entry_t *conv_info) {
 956
 957 /* decode the Bind info response from server */
 958
 959         offset += 6;
 960
 961         CHECK_PACKET_LENGTH( 4);
 962         if ( tree)
 963                 proto_tree_add_uint( tree, hf_msproxy_bind_id, NullTVB, offset, 4, pntohl( &pd[ offset]));
 964         offset += 14;
 965
 966
 967         CHECK_PACKET_LENGTH( 2);
 968         if ( tree)
 969                 proto_tree_add_uint( tree, hf_msproxy_dstport, NullTVB, offset, 2,
 970                         pntohs( &pd[ offset]));
 971         conv_info->dst_port = pntohs( &pd[ offset]);
 972         offset += 2;
 973
 974         CHECK_PACKET_LENGTH( 4);
 975         if ( tree)
 976                 proto_tree_add_ipv4( tree, hf_msproxy_dstaddr, NullTVB, offset, 4,
 977                         GWORD( pd, offset));
 978
 979         memcpy( &conv_info->dst_addr, &pd[ offset], sizeof( guint32));
 980
 981         offset += 12;
 982
 983         CHECK_PACKET_LENGTH( 2);
 984         if ( tree)
 985                 proto_tree_add_uint( tree, hf_msproxy_server_int_port, NullTVB, offset,
 986                         2, pntohs( &pd[ offset]));
 987         conv_info->server_int_port = pntohs( &pd[ offset]);
 988         offset += 4;
 989
 990         if ( tree) {
 991
 992                 CHECK_PACKET_LENGTH( 2);
 993                 proto_tree_add_uint( tree, hf_msproxy_server_ext_port, NullTVB, offset,
 994                         2, pntohs( &pd[ offset]));
 995                 offset += 2;
 996
 997                 CHECK_PACKET_LENGTH( 4);
 998                 proto_tree_add_ipv4( tree, hf_msproxy_server_ext_addr, NullTVB, offset,
 999                         4, GWORD( pd, offset));
1000
1001                 offset += 78;
1002                 display_application_name( pd, offset, fd, tree);
1003
1004         }
1005
1006         add_msproxy_conversation( conv_info);
1007 }
1008
1009
1010
1011 static void dissect_resolve(const u_char *pd, int offset, frame_data *fd,
1012         proto_tree *tree) {
1013
1014 /* dissect the  response resolve structure */
1015 /* display a string with a length, characters encoding */
1016 /* they are displayed under a tree with the name in Label variable */
1017 /* return the length of the string and the length byte */
1018
1019         if ( tree) {
1020
1021                 int addr_offset = GBYTE( pd, offset);
1022
1023                 proto_tree_add_text( tree, NullTVB, offset, 1, "Address offset: %d",
1024                         addr_offset);
1025
1026                 ++offset;
1027
1028                 offset += 13;
1029
1030                 offset += addr_offset;
1031
1032                 CHECK_PACKET_LENGTH( 4);
1033                 proto_tree_add_ipv4( tree, hf_msproxy_resolvaddr, NullTVB, offset, 4,
1034                         GWORD( pd, offset));
1035         }
1036 }
1037
1038
1039
1040 static void dissect_msproxy_response(const u_char *pd, int offset, frame_data *fd, proto_tree *tree, hash_entry_t *conv_info) {
1041
1042         char temp[ 255];
1043         int cmd;
1044
1045
1046         if ( tree) {
1047                 CHECK_PACKET_LENGTH( 4);
1048                 proto_tree_add_text( tree, NullTVB, offset, 4, "Client id: 0x%0x",
1049                         GWORD( pd, offset));
1050                 offset += 4;
1051
1052                 CHECK_PACKET_LENGTH( 4);
1053                 proto_tree_add_text( tree, NullTVB, offset, 4, "Version: 0x%04x",
1054                         GWORD( pd, offset));
1055                 offset += 4;
1056
1057                 CHECK_PACKET_LENGTH( 4);
1058                 proto_tree_add_text( tree, NullTVB, offset, 4, "Server id: 0x%04x",
1059                         GWORD( pd, offset));
1060                 offset += 4;
1061
1062                 CHECK_PACKET_LENGTH( 1);
1063                 proto_tree_add_text( tree, NullTVB, offset, 1, "Client ack: 0x%02x",
1064                         GBYTE( pd, offset));
1065
1066                 offset += 4;
1067
1068                 CHECK_PACKET_LENGTH( 1);
1069                 proto_tree_add_text( tree, NullTVB, offset, 1, "Sequence Number: 0x%02x",
1070                         GBYTE( pd, offset));
1071
1072                 offset += 8;
1073
1074                 CHECK_PACKET_LENGTH( 4);
1075                 strncpy( temp, &pd[ offset], 4);
1076                 temp[ 4] = 0;
1077                 proto_tree_add_text( tree, NullTVB, offset, 4, "RWSP signature: %s", temp);
1078
1079                 offset += 12;
1080         }
1081         else
1082                 offset += 36;
1083
1084         CHECK_PACKET_LENGTH( 2);
1085         cmd = pntohs( &pd[offset]);
1086
1087         if ( tree)
1088                 proto_tree_add_uint_format( tree, hf_msproxy_cmd, NullTVB, offset, 2,
1089                         cmd, "Command: 0x%02x (%s)", cmd,
1090                         get_msproxy_cmd_name( cmd, FROM_SERVER));
1091         offset += 2;
1092
1093         switch (cmd) {
1094                 case MSPROXY_HELLO_ACK:
1095                         dissect_hello_ack( pd, offset, fd, tree, conv_info);
1096                         break;
1097
1098                 case MSPROXY_USERINFO_ACK:
1099                         dissect_user_info_ack( pd, offset, fd, tree);
1100                         break;
1101
1102                 case MSPROXY_AUTH_1_ACK:
1103                         dissect_auth_1_ack( pd, offset, fd, tree);
1104                         break;
1105
1106 /* this also handle the MSPROXY_BIND_ACK ??? check this */
1107
1108                 case MSPROXY_UDPASSOCIATE_ACK:
1109                         dissect_udpassociate_ack( pd, offset, fd, tree);
1110                         break;
1111
1112                 case MSPROXY_AUTH_2_ACK:
1113                 case MSPROXY_AUTH_2_ACK2:
1114                         dissect_msproxy_response_4( pd, offset, fd, tree);
1115                         break;
1116
1117                 case MSPROXY_TCP_BIND_ACK:
1118                         dissect_tcp_bind_ack( pd, offset, fd, tree);
1119                         break;
1120
1121                 case MSPROXY_CONNECT_ACK:
1122                         dissect_connect_ack( pd, offset, fd, tree, conv_info);
1123                         break;
1124
1125                 case MSPROXY_BINDINFO:
1126                         dissect_bind_info( pd, offset, fd, tree, conv_info);
1127                         break;
1128
1129                 case MSPROXY_RESOLVE_ACK:
1130                         dissect_resolve( pd, offset, fd, tree);
1131                         break;
1132
1133                 case MSPROXY_CONNECT_AUTHFAILED:
1134                 case MSPROXY_BIND_AUTHFAILED:
1135                         proto_tree_add_text( tree, NullTVB, offset, 0, "No know information (help wanted)");
1136                         break;
1137
1138                 default:
1139
1140                         if (tree &&
1141                            (((cmd >> 8) ==  MSPROXY_CONNREFUSED) ||
1142                             ((cmd >> 12) ==  MSPROXY_CONNREFUSED)))
1143                                 proto_tree_add_text( tree, NullTVB, offset, 0,
1144                                         "No know information (help wanted)");
1145
1146                         else if ( tree)
1147                                 proto_tree_add_text( tree, NullTVB, offset, 0,
1148                                         "Unhandled response command (report this, please)");
1149         }
1150
1151
1152 }
1153
1154
1155
1156 static void dissect_msproxy(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
1157
1158
1159         proto_tree      *msproxy_tree = NULL;
1160         proto_item      *ti;
1161         unsigned int    cmd;
1162
1163
1164         hash_entry_t *hash_info;
1165         conversation_t *conversation;
1166
1167
1168         conversation = find_conversation( &pi.src, &pi.dst, pi.ptype,
1169                 pi.srcport, pi.destport);
1170
1171         if ( conversation)                      /* conversation found */
1172                 hash_info = conversation->data;
1173
1174                         /* new conversation create local data structure */
1175         else {
1176                 hash_info = g_mem_chunk_alloc(vals);
1177
1178                 conversation_new( &pi.src, &pi.dst, pi.ptype,
1179                         pi.srcport, pi.destport, hash_info);
1180         }
1181
1182         if (check_col(fd, COL_PROTOCOL))
1183                 col_add_str(fd, COL_PROTOCOL, "MSproxy");
1184
1185
1186                                                 /* display packet info */
1187         if (check_col(fd, COL_INFO)){
1188
1189                 cmd = pntohs( &pd[offset + 36]);
1190
1191                 if ( pi.srcport == UDP_PORT_MSPROXY)
1192                         col_add_fstr( fd, COL_INFO, "Server message: %s",
1193                                 get_msproxy_cmd_name( cmd, FROM_SERVER));
1194                 else
1195                         col_add_fstr(fd, COL_INFO, "Client message: %s",
1196                                 get_msproxy_cmd_name( cmd, FROM_CLIENT));
1197
1198         }
1199
1200         if (tree) {                             /* if proto tree, decode data */
1201                 ti = proto_tree_add_item( tree, proto_msproxy, NullTVB, offset,
1202                                 END_OF_FRAME, FALSE );
1203
1204                 msproxy_tree = proto_item_add_subtree(ti, ett_msproxy);
1205         }
1206
1207         if ( pi.srcport == UDP_PORT_MSPROXY)
1208                 dissect_msproxy_response( pd, offset, fd, msproxy_tree, hash_info);
1209         else
1210                 dissect_msproxy_request( pd, offset, fd, msproxy_tree, hash_info);
1211 }
1212
1213
1214
1215 static void msproxy_reinit( void){
1216
1217 /* Do the cleanup work when a new pass through the packet list is       */
1218 /* performed. Reset the highest row seen counter and re-initialize the  */
1219 /* conversation memory chunks.                                          */
1220
1221         last_row = 0;
1222
1223         if (vals)
1224                 g_mem_chunk_destroy(vals);
1225
1226         vals = g_mem_chunk_new("msproxy_vals", hash_val_length,
1227                 hash_init_count * hash_val_length,
1228                 G_ALLOC_AND_FREE);
1229
1230         if (redirect_vals)
1231                 g_mem_chunk_destroy(redirect_vals);
1232
1233         redirect_vals = g_mem_chunk_new("msproxy_redirect_vals", redirect_val_length,
1234                 redirect_init_count * redirect_val_length,
1235                 G_ALLOC_AND_FREE);
1236 }
1237
1238
1239
1240 void
1241 proto_register_msproxy( void){
1242
1243 /* Prep the msproxy protocol, for now, just register it */
1244
1245         static gint *ett[] = {
1246                 &ett_msproxy,
1247                 &ett_msproxy_name
1248         };
1249         static hf_register_info hf[] = {
1250
1251                 { &hf_msproxy_cmd,
1252                         { "Command", "msproxy.command", FT_UINT16, BASE_DEC,
1253                                  NULL, 0x0, ""
1254                         }
1255                 },
1256
1257                 { &hf_msproxy_dstaddr,
1258                         { "Destination Address", "msproxy.dstaddr", FT_IPv4, BASE_NONE, NULL,
1259                                 0x0, ""
1260                         }
1261                 },
1262
1263                 { &hf_msproxy_srcport,
1264                         { "Source Port", "msproxy.srcport", FT_UINT16,
1265                                 BASE_DEC, NULL, 0x0, ""
1266                         }
1267                 },
1268                 { &hf_msproxy_dstport,
1269                         { "Destination Port", "msproxy.dstport", FT_UINT16,
1270                                 BASE_DEC, NULL, 0x0, ""
1271                         }
1272                 },
1273                 { &hf_msproxy_clntport,
1274                         { "Client Port",        "msproxy.clntport", FT_UINT16,
1275                                 BASE_DEC, NULL, 0x0, ""
1276                         }
1277                 },
1278                 { &hf_msproxy_server_ext_addr,
1279                         { "Server External Address", "msproxy.server_ext_addr", FT_IPv4, BASE_NONE, NULL,
1280                                 0x0, ""
1281                         }
1282                 },
1283
1284                 { &hf_msproxy_server_ext_port,
1285                         { "Server External Port",       "msproxy.server_ext_port", FT_UINT16,
1286                                 BASE_DEC, NULL, 0x0, ""
1287                         }
1288                 },
1289
1290                 { &hf_msproxy_server_int_addr,
1291                         { "Server Internal Address", "msproxy.server_int_addr", FT_IPv4, BASE_NONE, NULL,
1292                                 0x0, ""
1293                         }
1294                 },
1295
1296                 { &hf_msproxy_server_int_port,
1297                         { "Server Internal Port",       "msproxy.server_int_port", FT_UINT16,
1298                                 BASE_DEC, NULL, 0x0, ""
1299                         }
1300                 },
1301                 { &hf_msproxy_serverport,
1302                         { "Server Port",        "msproxy.serverport", FT_UINT16,
1303                                 BASE_DEC, NULL, 0x0, ""
1304                         }
1305                 },
1306                 { &hf_msproxy_bindport,
1307                         { "Bind Port",  "msproxy.bindport", FT_UINT16,
1308                                 BASE_DEC, NULL, 0x0, ""
1309                         }
1310                 },
1311                 { &hf_msproxy_boundport,
1312                         { "Bound Port", "msproxy.boundport", FT_UINT16,
1313                                 BASE_DEC, NULL, 0x0, ""
1314                         }
1315                 },
1316                 { &hf_msproxy_serveraddr,
1317                         { "Server Address", "msproxy.serveraddr", FT_IPv4, BASE_NONE, NULL,
1318                                 0x0, ""
1319                         }
1320                 },
1321                 { &hf_msproxy_bindaddr,
1322                         { "Destination", "msproxy.bindaddr", FT_IPv4, BASE_NONE, NULL,
1323                                 0x0, ""
1324                         }
1325                 },
1326                 { &hf_msproxy_bind_id,
1327                         { "Bound Port Id",      "msproxy.bindid", FT_UINT32,
1328                                 BASE_HEX, NULL, 0x0, ""
1329                         }
1330                 },
1331                 { &hf_msproxy_resolvaddr,
1332                         { "Address", "msproxy.resolvaddr", FT_IPv4, BASE_NONE, NULL,
1333                                 0x0, ""
1334                         }
1335                 }
1336
1337         };
1338
1339         proto_msproxy = proto_register_protocol ( "MSProxy Protocol", "msproxy");
1340
1341         proto_register_field_array(proto_msproxy, hf, array_length(hf));
1342         proto_register_subtree_array(ett, array_length(ett));
1343
1344         register_init_routine( &msproxy_reinit);        /* register re-init routine */
1345 }
1346
1347
1348 void
1349 proto_reg_handoff_msproxy(void) {
1350
1351         /* dissector install routine */
1352
1353         old_dissector_add("udp.port", UDP_PORT_MSPROXY, dissect_msproxy);
1354 }