packet-giop.c

   1 /* packet-giop.c
   2  * Routines for CORBA GIOP/IIOP packet disassembly
   3  *
   4  * Laurent Deniel <deniel@worldnet.fr>
   5  *
   6  * $Id: packet-giop.c,v 1.3 1999/07/07 22:51:43 gram Exp $
   7  *
   8  * Ethereal - Network traffic analyzer
   9  * By Gerald Combs <gerald@zing.org>
  10  * Copyright 1998 Gerald Combs
  11  *
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version 2
  16  * of the License, or (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  26  *
  27  *
  28  */
  29
  30 #ifdef HAVE_CONFIG_H
  31 # include "config.h"
  32 #endif
  33
  34 #ifdef HAVE_SYS_TYPES_H
  35 # include <sys/types.h>
  36 #endif
  37
  38 #include <string.h>
  39 #include <ctype.h>
  40 #include <glib.h>
  41 #include "packet.h"
  42
  43 /*
  44  * GIOP / IIOP types definition - OMG CORBA 2.x / GIOP 1.[01]
  45  * See OMG WEB site <http://www.omg.org> - CORBA+IIOP 2.2 (98-02-01.ps)
  46  *
  47  * Notes on mapping:
  48  *
  49  * <sequence> : unsigned int (# elts) + elements
  50  * <string>   : unsigned int (string length) + length characters (with '\0')
  51  * <enum>     : unsigned int (from 0 to n)
  52  */
  53
  54 #define GIOP_MAGIC       "GIOP"
  55 #define GIOP_MAJOR       1
  56 #define GIOP_MINOR       1
  57
  58 #define GIOP_HEADER_SIZE 12
  59
  60 typedef struct OctetSequence{
  61   u_int         sequence_length;
  62   u_char        sequence_data[1];               /* of length bytes */
  63 } OctetSequence;
  64
  65 typedef OctetSequence Principal;
  66 typedef OctetSequence String;
  67
  68 /*
  69  * Some structures that contain sequences can not be directly used
  70  * (alignment problem on 64 bit architectures)
  71  */
  72
  73 typedef struct ServiceContext {
  74   u_int         context_id;
  75   OctetSequence context_data;
  76 } ServiceContext;
  77
  78 typedef struct ServiceContextList{
  79   u_int           nr_context;
  80   ServiceContext  service_context[1];           /* nr_context elements */
  81 } ServiceContextList;
  82
  83 typedef enum MsgType {
  84   Request,
  85   Reply,
  86   CancelRequest,
  87   LocateRequest,
  88   LocateReply,
  89   CloseConnection,
  90   MessageError,
  91   Fragment                                      /* GIOP 1.1 only */
  92 } MsgType;
  93
  94 typedef struct Version {
  95   u_char        major;
  96   u_char        minor;
  97 } Version;
  98
  99 typedef struct MessageHeader {
 100   char          magic[4];
 101   Version       GIOP_version;
 102   u_char        flags;                          /* byte_order in 1.0 */
 103   u_char        message_type;
 104   u_int         message_size;
 105 } MessageHeader;
 106
 107 typedef struct RequestHeader_1_0 {
 108   /* ServiceContextList service_context;*/
 109   u_int         request_id;
 110   u_char        response_expected;
 111   OctetSequence object_key;
 112   /* String     operation;              */
 113   /* Principal  requesting_principal;   */
 114 } RequestHeader_1_0;
 115
 116 typedef struct RequestHeader_1_1 {
 117   /* ServiceContextList service_context;*/
 118   u_int         request_id;
 119   u_char        response_expected;
 120   u_char        reserved[3];
 121   OctetSequence object_key;
 122   /* String     operation;              */
 123   /* Principal  requesting_principal;   */
 124 } RequestHeader_1_1;
 125
 126 typedef enum ReplyStatusType {
 127   NO_EXCEPTION,
 128   USER_EXCEPTION,
 129   SYSTEM_EXCEPTION,
 130   LOCATION_FORWARD
 131 } ReplyStatusType;
 132
 133 typedef struct ReplyHeader {
 134   /* ServiceContext service_context;    */
 135   u_int         request_id;
 136   u_int         reply_status;
 137 } ReplyHeader;
 138
 139 typedef struct SystemExceptionReplyBody {
 140   String        exception_id;
 141   u_int         minor_code_value;
 142   u_int         completion_status;
 143 } SystemExceptionReplyBody;
 144
 145 typedef struct CancelRequestHeader {
 146   u_int         request_id;
 147 } CancelRequestHeader;
 148
 149 typedef struct LocateRequestHeader {
 150   u_int         request_id;
 151   OctetSequence object_key;
 152 } LocateRequestHeader;
 153
 154 typedef enum LocateStatusType {
 155   UNKNOWN_OBJECT,
 156   OBJECT_HERE,
 157   OBJECT_FORWARD
 158 } LocateStatusType;
 159
 160 typedef struct LocateReplyHeader {
 161   u_int         request_id;
 162   u_int         locate_status;
 163 } LocateReplyHeader;
 164
 165
 166 u_char *print_object_key(int length, u_char *from)
 167 {
 168 #define MAX_OBJECT_KEY_LENGTH 64
 169   static u_char buffer[MAX_OBJECT_KEY_LENGTH];
 170   u_char *to = buffer;
 171   int i = 0;
 172   length = MIN(MAX_OBJECT_KEY_LENGTH - 3, length);
 173   *to++ = '"';
 174   while(i++ < length) {
 175     *to = (isprint(*from)) ? *from : '.';
 176     to++;
 177     from++;
 178   }
 179   *to++ = '"';
 180   *to = '\0';
 181   return buffer;
 182 }
 183
 184 /* main entry point */
 185
 186 void dissect_giop(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
 187 {
 188
 189   MessageHeader header;
 190   proto_tree *clnp_tree = NULL;
 191   proto_item *ti;
 192   u_char response_expected = 0;
 193   u_int first_offset = offset;
 194   u_int big_endian = FALSE;
 195   u_int request_id = 0;
 196   u_int message_size;
 197   u_int minor_version;
 198   u_int context_id;
 199   u_int reply_status;
 200   u_int locate_status;
 201   u_int sequence_length;
 202   u_int nr_seq;
 203   RequestHeader_1_1 request_1_1;
 204   RequestHeader_1_0 request_1_0;
 205   ReplyHeader reply;
 206   LocateReplyHeader locate_rep;
 207   LocateRequestHeader locate_req;
 208   int i;
 209
 210 #define END_OF_GIOP_MESSAGE (offset - first_offset - GIOP_HEADER_SIZE)
 211
 212   if (fd->cap_len < offset + GIOP_HEADER_SIZE) {
 213     dissect_data(pd, offset, fd, tree);
 214     return;
 215   }
 216
 217   /* avoid alignment problem */
 218
 219   memcpy(&header, &pd[offset], sizeof(header));
 220
 221   /* check magic number and version */
 222
 223   if (memcmp(header.magic, GIOP_MAGIC, sizeof(header.magic)) != 0) {
 224     dissect_data(pd, offset, fd, tree);
 225     return;
 226   }
 227
 228   if (header.GIOP_version.major != GIOP_MAJOR ||
 229       ((minor_version = header.GIOP_version.minor) >  GIOP_MINOR)) {
 230     dissect_data(pd, offset, fd, tree);
 231     return;
 232   }
 233
 234   switch(minor_version) {
 235     case 1  :
 236       if (header.flags & 0x01)
 237         big_endian = FALSE;
 238       else
 239         big_endian = TRUE;
 240       break;
 241     case 0  :
 242       if (header.flags)
 243         big_endian = FALSE;
 244       else
 245         big_endian = TRUE;
 246       break;
 247     default :
 248       break;
 249   }
 250
 251   if (big_endian)
 252     message_size = pntohl(&header.message_size);
 253   else
 254     message_size = pletohl(&header.message_size);
 255
 256   if (check_col(fd, COL_PROTOCOL)) {
 257     col_add_str(fd, COL_PROTOCOL, "GIOP");
 258   }
 259
 260   if (tree) {
 261     ti = proto_tree_add_text(tree, offset,
 262                           GIOP_HEADER_SIZE + message_size,
 263                           "General Inter-ORB Protocol");
 264     clnp_tree = proto_item_add_subtree(ti, ETT_GIOP);
 265     proto_tree_add_text(clnp_tree, offset,      4,
 266                      "Magic number: %s", GIOP_MAGIC);
 267     proto_tree_add_text(clnp_tree, offset +  4, 2,
 268                      "Version: %d.%d",
 269                      header.GIOP_version.major,
 270                      header.GIOP_version.minor);
 271     switch(minor_version) {
 272       case 1  :
 273         proto_tree_add_text(clnp_tree, offset +  6, 1,
 274                          "Flags: 0x%02x (%s%s)",
 275                          header.flags,
 276                          (big_endian) ? "little" : "big",
 277                          (header.flags & 0x02) ? " fragment" : "");
 278         break;
 279       case 0  :
 280         proto_tree_add_text(clnp_tree, offset +  6, 1,
 281                          "Byte ordering: %s endian",
 282                          (big_endian) ? "little" : "big");
 283         break;
 284       default :
 285         break;
 286     } /* minor_version */
 287
 288     proto_tree_add_text(clnp_tree, offset +  7, 1,
 289                      "Message type: %s",
 290                      (header.message_type == Request) ? "Request" :
 291                      (header.message_type == Reply) ? "Reply" :
 292                      (header.message_type == CancelRequest) ? "CancelRequest" :
 293                      (header.message_type == LocateRequest) ? "LocateRequest" :
 294                      (header.message_type == LocateReply) ? "LocateReply" :
 295                      (header.message_type == CloseConnection) ? "CloseConnection" :
 296                      (header.message_type == MessageError) ? "MessageError" :
 297                      (header.message_type == Fragment) ? "Fragment" : "?");
 298
 299     proto_tree_add_text(clnp_tree, offset +  8, 4,
 300                      "Message size: %d", message_size);
 301
 302   } /* tree */
 303
 304   offset += GIOP_HEADER_SIZE;
 305
 306   if (fd->cap_len < offset + message_size) {
 307     dissect_data(pd, offset, fd, tree);
 308     return;
 309   }
 310
 311   /* skip service_context in Request/Reply messages */
 312
 313   switch(header.message_type) {
 314
 315     case Request:
 316     case Reply :
 317
 318       nr_seq = (big_endian) ? pntohl(&pd[offset]) : pletohl(&pd[offset]);
 319
 320       offset += sizeof(nr_seq);
 321
 322       for (i = 0 ; i < nr_seq ; i++) {
 323
 324         if (big_endian) {
 325           context_id = pntohl(&pd[offset]);
 326           sequence_length = pntohl(&pd[offset + sizeof(context_id)]);
 327         }
 328         else {
 329           context_id = pletohl(&pd[offset]);
 330           sequence_length = pletohl(&pd[offset + sizeof(context_id)]);
 331         }
 332
 333         if (tree) {
 334           proto_tree_add_text(clnp_tree, offset, sizeof(context_id),
 335                            "Context id: %d", context_id);
 336           proto_tree_add_text(clnp_tree, offset + sizeof(context_id),
 337                            sizeof(sequence_length),
 338                            "Sequence length: %d", sequence_length);
 339           proto_tree_add_text(clnp_tree,
 340                            offset +
 341                            sizeof(context_id) + sizeof(sequence_length),
 342                            sequence_length,
 343                            "Sequence data: <not shown>");
 344         }
 345
 346         offset += sizeof(context_id) + sizeof(sequence_length) + sequence_length;
 347         offset += (sequence_length %4) ? 4 - (sequence_length%4) : 0 ;
 348
 349       } /* for */
 350
 351     default :
 352       break;
 353
 354   } /* switch message_type */
 355
 356   /* decode next parts according to message type */
 357
 358   switch(header.message_type) {
 359
 360     case Request:
 361
 362       switch(minor_version) {
 363         case 1  :
 364           memcpy(&request_1_1, &pd[offset], sizeof(request_1_1));
 365           response_expected = request_1_1.response_expected;
 366           request_id = (big_endian)? pntohl(&request_1_1.request_id) :
 367             pletohl(&request_1_1.request_id);
 368           if (tree) {
 369             proto_tree_add_text(clnp_tree, offset, sizeof(request_id),
 370                              "Request id: %d", request_id);
 371             proto_tree_add_text(clnp_tree, offset + sizeof(request_id),
 372                              sizeof(request_1_1.response_expected),
 373                              "Response expected: %d",
 374                              response_expected);
 375             proto_tree_add_text(clnp_tree, offset + sizeof(request_id) +
 376                              sizeof(request_1_1.response_expected),
 377                              3,
 378                              "Reserved");
 379           }
 380           offset += sizeof(request_id) +
 381             sizeof(request_1_1.response_expected) + 3;
 382           break;
 383         case 0  :
 384           memcpy(&request_1_0, &pd[offset], sizeof(request_1_0));
 385           response_expected = request_1_0.response_expected;
 386           request_id = (big_endian)? pntohl(&request_1_0.request_id) :
 387             pletohl(&request_1_0.request_id);
 388           if (tree) {
 389             proto_tree_add_text(clnp_tree, offset, sizeof(request_id),
 390                              "Request id: %d", request_id);
 391             proto_tree_add_text(clnp_tree, offset + sizeof(request_id),
 392                              sizeof(request_1_0.response_expected),
 393                              "Response expected: %d",
 394                              response_expected);
 395           }
 396
 397           offset += sizeof(request_id) +
 398             sizeof(request_1_0.response_expected);
 399           break;
 400         default :
 401           break;
 402       }
 403
 404       /* strange thing here with some ORBs/IIOP1.0 ? */
 405       if ((offset - first_offset) % 4)
 406         offset += 4 - (offset - first_offset)%4;
 407
 408       /* object_key */
 409
 410       sequence_length = (big_endian) ?
 411         pntohl(&pd[offset]) : pletohl(&pd[offset]);
 412
 413       if (tree) {
 414         proto_tree_add_text(clnp_tree, offset, sizeof(sequence_length),
 415                          "Object key length: %d", sequence_length);
 416         proto_tree_add_text(clnp_tree, offset + sizeof(sequence_length),
 417                          sequence_length,
 418                          "Object key: %s",
 419                          print_object_key(sequence_length,
 420                            (u_char *)&pd[offset + sizeof(sequence_length)]));
 421       }
 422
 423       /* operation & requesting_principal */
 424
 425       offset += sizeof(sequence_length) + sequence_length;
 426       offset += (sequence_length %4) ? 4 - (sequence_length%4) : 0 ;
 427
 428       sequence_length = (big_endian) ?
 429         pntohl(&pd[offset]) : pletohl(&pd[offset]);
 430
 431       if (sequence_length > message_size) {
 432         dissect_data(pd, offset, fd, tree);
 433         return;
 434       }
 435
 436       if (tree) {
 437         proto_tree_add_text(clnp_tree, offset, sizeof(sequence_length),
 438                          "Operation length: %d", sequence_length);
 439         proto_tree_add_text(clnp_tree, offset + sizeof(sequence_length),
 440                          sequence_length,
 441                          "Operation: %s",
 442                          &pd[offset+sizeof(sequence_length)]);
 443         proto_tree_add_text(clnp_tree, offset +
 444                          sizeof(sequence_length)+ sequence_length,
 445                          message_size - END_OF_GIOP_MESSAGE -
 446                          sizeof(sequence_length) - sequence_length,
 447                          "Requesting principal: <not shown>");
 448       }
 449
 450       if (check_col(fd, COL_INFO)) {
 451         col_add_fstr(fd, COL_INFO, "Request %s %d: %s",
 452                 response_expected ? "two-way" : "one-way" ,
 453                 request_id,
 454                 &pd[offset+sizeof(sequence_length)]);
 455       }
 456
 457       break;
 458
 459     case Reply :
 460
 461       memcpy(&reply, &pd[offset], sizeof(reply));
 462       request_id =  (big_endian) ?
 463         pntohl(&reply.request_id) : pletohl(&reply.request_id);
 464       reply_status = (big_endian) ?
 465         pntohl(&reply.reply_status) : pletohl(&reply.reply_status);
 466
 467       if (tree) {
 468         proto_tree_add_text(clnp_tree, offset, sizeof(request_id),
 469                          "Request id: %d", request_id);
 470         proto_tree_add_text(clnp_tree, offset + sizeof(request_id),
 471                          sizeof(reply_status),
 472                          "Reply status: %s",
 473                          reply_status == NO_EXCEPTION ? "no exception" :
 474                          reply_status == USER_EXCEPTION ? "user exception" :
 475                          reply_status == SYSTEM_EXCEPTION ? "system exception" :
 476                          reply_status == LOCATION_FORWARD ? "location forward" :
 477                          "?");
 478       }
 479
 480       if (check_col(fd, COL_INFO)) {
 481         col_add_fstr(fd, COL_INFO, "Reply %d: %s",
 482                 request_id,
 483                 reply_status == NO_EXCEPTION ? "no exception" :
 484                 reply_status == USER_EXCEPTION ? "user exception" :
 485                 reply_status == SYSTEM_EXCEPTION ? "system exception" :
 486                 reply_status == LOCATION_FORWARD ? "location forward" :
 487                 "?");
 488       }
 489
 490       offset += sizeof(request_id) + sizeof(reply_status);
 491
 492       if (reply_status == SYSTEM_EXCEPTION) {
 493
 494         u_int minor_code_value;
 495         u_int completion_status;
 496
 497         sequence_length = (big_endian) ?
 498           pntohl(&pd[offset]) : pletohl(&pd[offset]);
 499
 500         if (sequence_length > message_size) {
 501           dissect_data(pd, offset, fd, tree);
 502           return;
 503         }
 504
 505         if (tree) {
 506           proto_tree_add_text(clnp_tree, offset, sizeof(sequence_length),
 507                            "Exception length: %d", sequence_length);
 508           proto_tree_add_text(clnp_tree, offset + sizeof(sequence_length),
 509                            sequence_length,
 510                            "Exception id: %s",
 511                            &pd[offset+sizeof(sequence_length)]);
 512
 513         }
 514
 515         offset += sizeof(sequence_length) + sequence_length;
 516
 517         minor_code_value = (big_endian) ?
 518           pntohl(&pd[offset]) : pletohl(&pd[offset]);
 519         completion_status = (big_endian) ?
 520           pntohl(&pd[offset+sizeof(minor_code_value)]) :
 521           pletohl(&pd[offset+sizeof(minor_code_value)]);
 522
 523         if (tree) {
 524           proto_tree_add_text(clnp_tree, offset, sizeof(minor_code_value),
 525                            "Minor code value: %d", minor_code_value);
 526           proto_tree_add_text(clnp_tree, offset + sizeof(minor_code_value),
 527                            sizeof(completion_status),
 528                            "Completion Status: %d",
 529                            completion_status);
 530
 531         }
 532
 533       }
 534       else if (reply_status == USER_EXCEPTION) {
 535
 536         sequence_length = (big_endian) ?
 537           pntohl(&pd[offset]) : pletohl(&pd[offset]);
 538
 539         if (sequence_length > message_size) {
 540           dissect_data(pd, offset, fd, tree);
 541           return;
 542         }
 543
 544         if (tree) {
 545           proto_tree_add_text(clnp_tree, offset, sizeof(sequence_length),
 546                            "Exception length: %d", sequence_length);
 547           proto_tree_add_text(clnp_tree, offset + sizeof(sequence_length),
 548                            sequence_length,
 549                            "Exception id: %s",
 550                            &pd[offset+sizeof(sequence_length)]);
 551
 552         }
 553
 554         offset += sizeof(sequence_length) + sequence_length;
 555
 556         sequence_length = (big_endian) ?
 557           pntohl(&pd[offset]) : pletohl(&pd[offset]);
 558
 559         if (sequence_length > message_size) {
 560           dissect_data(pd, offset, fd, tree);
 561           return;
 562         }
 563
 564         if (tree && sequence_length) {
 565           proto_tree_add_text(clnp_tree, offset, sizeof(sequence_length),
 566                            "Exception member length: %d", sequence_length);
 567           proto_tree_add_text(clnp_tree, offset + sizeof(sequence_length),
 568                            sequence_length,
 569                            "Exception member: %s",
 570                            &pd[offset+sizeof(sequence_length)]);
 571         }
 572
 573         offset += sizeof(sequence_length) + sequence_length;
 574
 575       }
 576       else {
 577
 578         if (tree) {
 579           proto_tree_add_text(clnp_tree, offset,
 580                            message_size - END_OF_GIOP_MESSAGE,
 581                            "Reply body: <not shown>");
 582         }
 583
 584       } /* reply_status */
 585
 586       break;
 587
 588     case LocateRequest :
 589
 590       memcpy(&locate_req, &pd[offset], sizeof(locate_req));
 591       request_id =  (big_endian) ?
 592         pntohl(&locate_req.request_id) : pletohl(&locate_req.request_id);
 593
 594       sequence_length = (big_endian) ?
 595         pntohl(&pd[offset+sizeof(request_id)]) :
 596         pletohl(&pd[offset+sizeof(request_id)]);
 597
 598       if (tree) {
 599         proto_tree_add_text(clnp_tree, offset, sizeof(request_id),
 600                          "Request id: %d", request_id);
 601         proto_tree_add_text(clnp_tree, offset + sizeof(request_id),
 602                          sizeof(sequence_length),
 603                          "Object key length: %d", sequence_length);
 604         offset += sizeof(request_id) + sizeof(sequence_length);
 605         proto_tree_add_text(clnp_tree,
 606                          offset,
 607                          sequence_length,
 608                          "Object key: %s",
 609                          print_object_key(sequence_length,
 610                                           (u_char *)&pd[offset]));
 611       }
 612
 613       if (check_col(fd, COL_INFO)) {
 614         col_add_fstr(fd, COL_INFO, "LocateRequest %d", request_id);
 615       }
 616
 617       break;
 618
 619     case LocateReply :
 620
 621       memcpy(&locate_rep, &pd[offset], sizeof(locate_rep));
 622       request_id =  (big_endian) ?
 623         pntohl(&locate_rep.request_id) : pletohl(&locate_rep.request_id);
 624       locate_status = (big_endian) ?
 625         pntohl(&locate_rep.locate_status) : pletohl(&locate_rep.locate_status);
 626
 627       if (tree) {
 628         proto_tree_add_text(clnp_tree, offset, sizeof(request_id),
 629                          "Request id: %d", request_id);
 630         proto_tree_add_text(clnp_tree, offset + sizeof(request_id),
 631                          sizeof(locate_status),
 632                          "Locate status: %d", locate_status);
 633         offset += sizeof(request_id) + sizeof(locate_status);
 634         if (locate_status == OBJECT_FORWARD) {
 635           proto_tree_add_text(clnp_tree, offset,
 636                            message_size - END_OF_GIOP_MESSAGE,
 637                            "Locate reply body: <not shown>");
 638         }
 639       }
 640
 641       if (check_col(fd, COL_INFO)) {
 642         col_add_fstr(fd, COL_INFO, "LocateReply %d: %s",
 643                 request_id,
 644                 (locate_status == UNKNOWN_OBJECT) ? "Unknown object" :
 645                 (locate_status == OBJECT_HERE) ? "Object here" :
 646                 (locate_status == OBJECT_FORWARD) ? "Object forward" : "?");
 647       }
 648
 649       break;
 650
 651     case CancelRequest :
 652
 653       request_id =  (big_endian) ?
 654         pntohl(&pd[offset]) : pletohl(&pd[offset]);
 655
 656       if (tree) {
 657         proto_tree_add_text(clnp_tree, offset, sizeof(request_id),
 658                          "Request id: %d", request_id);
 659       }
 660
 661       if (check_col(fd, COL_INFO)) {
 662         col_add_fstr(fd, COL_INFO, "CancelRequest %d", request_id);
 663       }
 664
 665       break;
 666
 667     case CloseConnection :
 668       if (check_col(fd, COL_INFO)) {
 669         col_add_str(fd, COL_INFO, "CloseConnection");
 670       }
 671       break;
 672
 673     case MessageError :
 674       if (check_col(fd, COL_INFO)) {
 675         col_add_str(fd, COL_INFO, "MessageError");
 676       }
 677       break;
 678
 679     case Fragment :
 680       if (check_col(fd, COL_INFO)) {
 681         col_add_str(fd, COL_INFO, "Fragment");
 682       }
 683       break;
 684
 685     default :
 686       break;
 687
 688   } /* switch message_type */
 689
 690
 691   offset = first_offset + GIOP_HEADER_SIZE + message_size;
 692
 693   if (offset < fd->cap_len) {
 694     dissect_data(pd, offset, fd, tree);
 695   }
 696
 697 } /* dissect_giop */
 698