packet-netbios.c

   1 /* packet-netbios.c
   2  * Routines for NetBIOS protocol packet disassembly
   3  * Jeff Foster <foste@woodward.com>
   4  * Copyright 1999 Jeffrey C. Foster
   5  *
   6  * derived from the packet-nbns.c
   7  *
   8  * $Id: packet-netbios.c,v 1.2 1999/08/18 22:49:41 gram Exp $
   9  *
  10  * Ethereal - Network traffic analyzer
  11  * By Gerald Combs <gerald@zing.org>
  12  * Copyright 1998 Gerald Combs
  13  *
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  28  */
  29
  30 #ifdef HAVE_CONFIG_H
  31 # include "config.h"
  32 #endif
  33
  34 #ifdef HAVE_SYS_TYPES_H
  35 # include <sys/types.h>
  36 #endif
  37
  38 #include <stdio.h>
  39 #include <string.h>
  40 #include <glib.h>
  41 #include "packet.h"
  42 #include "packet-dns.h"
  43 #include "util.h"
  44
  45 /* Netbios command numbers */
  46 #define NB_ADD_GROUP            0x00
  47 #define NB_ADD_NAME             0x01
  48 #define NB_DATAGRAM             0x08
  49 #define NB_NAME_QUERY           0x0a
  50 #define NB_NAME_RESP            0x0e
  51 #define NB_DATA_ACK             0x14
  52 #define NB_DATA_ONLY_LAST       0x16
  53 #define NB_SESSION_CONFIRM      0x17
  54 #define NB_SESSION_INIT         0x19
  55 #define NB_KEEP_ALIVE           0x1f
  56
  57
  58 /* Offsets of fields in the NetBIOS header. */
  59 #define NB_LENGTH               0
  60 #define NB_DELIMITER            2
  61 #define NB_COMMAND              4
  62 #define NB_FLAGS                5
  63 #define NB_DATA1                5
  64 #define NB_RESYNC               6
  65 #define NB_DATA2                6
  66 #define NB_CALL_NAME_TYPE       7
  67 #define NB_XMIT_CORL            8
  68 #define NB_RESP_CORL            10
  69 #define NB_RMT_SES              12
  70 #define NB_LOCAL_SES            13
  71 #define NB_RECVER_NAME          12
  72 #define NB_SENDER_NAME          28
  73
  74
  75
  76
  77 static int proto_netbios = -1;
  78
  79 /* a number to bit image table */
  80
  81 static char *bit_field_str[] = {
  82         "000",
  83         "001",
  84         "010",
  85         "011",
  86         "100",
  87         "101",
  88         "110",
  89         "111"};
  90
  91
  92 /* the strings for the station type, used by get_netbios_name function */
  93
  94 char *name_type_str[] = {
  95         "Workstation/Redirector",       /* 0x00 */
  96         "Browser",                      /* 0x01 */
  97         "Unknown",
  98         "Messenger service/Main name",  /* 0x03 */
  99         "Unknown",
 100         "Forwarded name",               /* 0x05 */
 101         "RAS Server service",           /* 0x06 */
 102         "Unknown",
 103         "Unknown",
 104         "Unknown",
 105         "Unknown",
 106         "Unknown",
 107         "Unknown",
 108         "Unknown",
 109         "Unknown",
 110         "Unknown",
 111         "Unknown",                      /* 0x10 */
 112         "Unknown",
 113         "Unknown",
 114         "Unknown",
 115         "Unknown",
 116         "Unknown",
 117         "Unknown",
 118         "Unknown",
 119         "Unknown",
 120         "Unknown",
 121         "Unknown",
 122         "PDC Domain name",              /* 0x1b */
 123         "BDC Domain name",              /* 0x1c */
 124         "Master Browser backup",        /* 0x1d */
 125         "Browser Election Service",     /* 0x1e */
 126         "Net DDE Service",              /* 0x1f */
 127         "Server service",               /* 0x20 */
 128         "RAS client service",           /* 0x21 */
 129         "Unknown",      /* need 'Unknown' as last entry (for limiting stuff) */
 130 };
 131
 132 static int nb_name_type_max = sizeof(name_type_str) /sizeof( char*);
 133
 134 /* the strings for the command types  */
 135
 136 char *CommandName[] = {
 137                 "Add Group Query",      /* 0x00 */
 138                 "Add Name Query",       /* 0x01 */
 139                 "Unknown",
 140                 "Unknown",
 141                 "Unknown",
 142                 "Unknown",
 143                 "Unknown",
 144                 "Unknown",
 145                 "Datagram",             /* 0x08 */
 146                 "Unknown",
 147                 "Name Query",           /* 0x0A */
 148                 "Unknown",
 149                 "Unknown",
 150                 "Unknown",
 151                 "Name Recognized",      /* 0x0E */
 152                 "Unknown",
 153                 "Unknown",
 154                 "Unknown",
 155                 "Unknown",
 156                 "Unknown",
 157                 "Data Ack",             /* 0x14 */
 158                 "Unknown",
 159                 "Data Only Last",       /* 0x16 */
 160                 "Session Confirm",      /* 0x17 */
 161                 "Unknown",
 162                 "Session Initialize",   /* 0x19 */
 163                 "Unknown",
 164                 "Unknown",
 165                 "Unknown",
 166                 "Unknown",
 167                 "Unknown",
 168                 "Session Alive",        /* 0x1f */
 169         };
 170
 171 void capture_netbios(const u_char *pd, int offset, guint32 cap_len,
 172         packet_counts *ld)
 173 {
 174         ld->netbios++;
 175 }
 176
 177
 178 static guint get_netbios_name(const u_char *data_ptr, int offset, char *name_ret)
 179
 180 {/*  Extract the name string and name type.  Return the name string in  */
 181  /* name_ret and return the name_type. */
 182
 183         int i;
 184         char  name_type = *(data_ptr + offset + 15);
 185         const char *name_ptr = data_ptr + offset;
 186
 187         for( i = 0; i <16; ++i){
 188                 if ( 0x20 == (*name_ret++ = *name_ptr++))       /* exit if space */
 189                         break;
 190         }
 191
 192         *name_ret = 0;
 193         return (guint)name_type;
 194 }
 195
 196
 197 static void netbios_add_name( char* label, const u_char *pd, int offset,
 198     int nb_offset, proto_tree *tree)
 199
 200 {/* add a name field display tree. Display the name and station type in sub-tree */
 201  /* NOTE: offset = offset to start of netbios header    */
 202  /*       nb_offset = offset inside of netbios header   */
 203
 204         proto_tree *field_tree;
 205         proto_item *tf;
 206         char  name_str[ 17];
 207         int   name_type;
 208
 209                                         /* decode the name field */
 210         name_type = get_netbios_name( pd, nb_offset, name_str);
 211
 212         if ( nb_name_type_max < name_type)      /* limit type value */
 213                 name_type = nb_name_type_max;
 214
 215         tf = proto_tree_add_text( tree, offset + nb_offset, 16,
 216                 "%s: %s (%s)", label, name_str, name_type_str[name_type]);
 217
 218         field_tree = proto_item_add_subtree( tf, ETT_NETB_NAME);
 219
 220         proto_tree_add_text( field_tree, offset + nb_offset, 15, "%s",
 221             name_str);
 222         proto_tree_add_text( field_tree, offset + nb_offset + 15, 1,
 223             "0x%0x (%s)", name_type, name_type_str[ name_type]);
 224 }
 225
 226
 227 static void netbios_add_flags( const u_char *pd, proto_tree *tree, int offset)
 228
 229 {
 230
 231         proto_tree *field_tree;
 232         proto_item *tf;
 233         guint flags = *(pd + offset);
 234                                         /* decode the flag field */
 235
 236
 237         tf = proto_tree_add_text( tree, offset, 1,
 238                         "Flags: 0x%02x", flags);
 239         field_tree = proto_item_add_subtree(tf, ETT_NETB_FLAGS);
 240
 241         proto_tree_add_text( field_tree, offset, 1, "%s%s",
 242                 decode_boolean_bitfield(flags, 0x80,
 243                         8, "No", ""), " NO.ACK indicator");
 244
 245         proto_tree_add_text(field_tree, offset, 1,
 246                  ".... %s. = Largest Frame Size = %d",
 247                 bit_field_str[(flags & 0x0e) >> 1], ((flags & 0x0e) >> 1));
 248
 249         proto_tree_add_text(field_tree, offset, 1, "%s",
 250                 decode_boolean_bitfield( flags, 0x01,
 251                         8, "Version 2.0 or higher", "Pre version 2.0"));
 252 }
 253
 254
 255 static void netbios_add_ses_confirm_flags( const u_char *pd, proto_tree *tree,
 256         int offset)
 257
 258 {
 259         proto_tree *field_tree;
 260         proto_item *tf;
 261         guint flags = *(pd + offset);
 262                                         /* decode the flag field */
 263
 264
 265         tf = proto_tree_add_text( tree, offset, 1,
 266                         "Flags: 0x%02x", flags);
 267         field_tree = proto_item_add_subtree( tf, ETT_NETB_FLAGS);
 268
 269         proto_tree_add_text(field_tree, offset, 1, "%s%s",
 270                         decode_boolean_bitfield(flags, 0x80,
 271                                 8, "No", ""), " NO.ACK indicator");
 272
 273         proto_tree_add_text(field_tree, offset, 1, "%s",
 274                         decode_boolean_bitfield(flags, 0x01,
 275                                 8, "Pre version 2.0", "Version 2.0 or higher"));
 276 }
 277
 278
 279 static void netbios_data_only_flags( const u_char *pd, proto_tree *tree,
 280     int offset)
 281
 282 {
 283         proto_tree *field_tree;
 284         proto_item *tf;
 285         guint flags = *(pd + offset);
 286                                         /* decode the flag field for data_only packet*/
 287
 288
 289         tf = proto_tree_add_text( tree, offset, 1,
 290                         "Flags: 0x%02x", flags);
 291         field_tree = proto_item_add_subtree(tf, ETT_NETB_FLAGS);
 292
 293         proto_tree_add_text(field_tree, offset, 1, "%s%s",
 294                         decode_boolean_bitfield(flags, 0x08,
 295                                 8, "", "No "), "Acknowledge_Included");
 296         proto_tree_add_text(field_tree, offset, 1, "%s%s",
 297                         decode_boolean_bitfield(flags, 0x04,
 298                                 8, "", "No "), "Ack_with_data_allowed");
 299
 300         proto_tree_add_text(field_tree, offset, 1, "%s%s",
 301                         decode_boolean_bitfield(flags, 0x02,
 302                                 8, "", "No "), "NO.ACK indicator");
 303 }
 304
 305
 306 /************************************************************************/
 307 /*                                                                      */
 308 /*  The routines to display the netbios field values in the tree        */
 309 /*                                                                      */
 310 /************************************************************************/
 311
 312
 313 static void nb_xmit_corrl(const u_char *data_ptr, int offset, proto_tree *tree)
 314
 315 {/* display the transmit correlator */
 316
 317         proto_tree_add_text( tree, offset + NB_XMIT_CORL, 2,
 318             "Transmit Correlator: 0x%04x", pletohs( data_ptr + NB_XMIT_CORL));
 319 }
 320
 321
 322 static void nb_resp_corrl(const u_char *data_ptr, int offset, proto_tree *tree)
 323
 324 {/* display the response correlator */
 325
 326         proto_tree_add_text( tree, offset + NB_RESP_CORL, 2,
 327             "Response Correlator: 0x%04x", pletohs( data_ptr + NB_RESP_CORL));
 328 }
 329
 330
 331 static void nb_call_name_type(const u_char *data_ptr, int offset,
 332     proto_tree *tree)
 333
 334 {/* display the call name type */
 335
 336         int name_type_value = MIN(*(data_ptr + NB_CALL_NAME_TYPE),
 337                 nb_name_type_max);
 338
 339         proto_tree_add_text( tree, offset + NB_CALL_NAME_TYPE, 1,
 340             "Caller's Name Type.: 0x%02x (%s)",
 341             *(data_ptr + NB_CALL_NAME_TYPE),
 342             name_type_str[ name_type_value]);
 343 }
 344
 345
 346 static void nb_local_session(const u_char *data_ptr, int offset,
 347     proto_tree *tree)
 348
 349 {/* add the local session to tree */
 350
 351         proto_tree_add_text( tree, offset +NB_LOCAL_SES, 1,
 352             "Local Session No.: 0x%02d", *(data_ptr + NB_LOCAL_SES));
 353 }
 354
 355
 356 static void nb_remote_session(const u_char *data_ptr, int offset,
 357     proto_tree *tree)
 358
 359 {/* add the remote session to tree */
 360
 361         proto_tree_add_text( tree, offset +NB_RMT_SES, 1,
 362             "Remote Session No.: 0x%02d", *(data_ptr + NB_RMT_SES));
 363 }
 364
 365
 366 static void nb_data1( char *label, const u_char *data_ptr, int offset,
 367     proto_tree *tree)
 368
 369 {/* add the DATA1 to tree with format string = label */
 370
 371         proto_tree_add_text( tree, offset + NB_DATA1, 1, label,
 372             *(data_ptr + NB_DATA1));
 373 }
 374
 375
 376 static void nb_data2( char *label, int len, const u_char *data_ptr, int offset,
 377     proto_tree *tree)
 378
 379 {/* add the DATA2 to tree with format string = label and length of len */
 380
 381         int value = (len == 1 ? *(data_ptr + NB_DATA2)
 382                         : pletohs( data_ptr + NB_DATA2));
 383
 384         proto_tree_add_text( tree, offset +NB_DATA2, len, label, value);
 385 }
 386
 387 /************************************************************************/
 388 /*                                                                      */
 389 /*  The routines called by the top level to handle individual commands  */
 390 /*                                                                      */
 391 /************************************************************************/
 392
 393 static void  dissect_netb_unknown(const u_char *data_ptr, int offset,
 394     frame_data *fd, proto_tree *tree)
 395
 396 {/* Handle any unknow commands, do nothing */
 397
 398 //$$    dissect_data( data_ptr, offset + NB_COMMAND + 1, fd, tree);
 399 }
 400
 401
 402 static void  dissect_netb_add_group(const u_char *data_ptr, int offset,
 403     frame_data *fd, proto_tree *tree)
 404
 405 {/* Handle the ADD GROUP command */
 406
 407         nb_resp_corrl( data_ptr, offset, tree);
 408
 409         netbios_add_name( "Group to add", data_ptr,
 410                             offset, NB_SENDER_NAME, tree);
 411 }
 412
 413
 414 static void  dissect_netb_add_name(const u_char *data_ptr, int offset,
 415     frame_data *fd, proto_tree *tree)
 416
 417 {/* Handle the ADD NAME command */
 418
 419         nb_resp_corrl( data_ptr, offset, tree);
 420
 421         netbios_add_name( "Name to add", data_ptr,
 422                             offset, NB_SENDER_NAME, tree);
 423 }
 424
 425
 426 static void  dissect_netb_name_query(const u_char *data_ptr, int offset,
 427     frame_data *fd, proto_tree *tree)
 428
 429 {/* Handle the NAME QUERY command */
 430
 431         nb_data2( "Local Session No.: 0x%02x", 1, data_ptr, offset, tree);
 432         nb_call_name_type( data_ptr, offset, tree);
 433         netbios_add_name( "Query Name", data_ptr, offset, NB_RECVER_NAME, tree);
 434         netbios_add_name( "Sender's Name", data_ptr, offset, NB_SENDER_NAME,
 435             tree);
 436 }
 437
 438
 439 static void  dissect_netb_name_resp(const u_char *data_ptr, int offset,
 440     frame_data *fd, proto_tree *tree)
 441
 442 {/* Handle the NAME RESPONSE command */
 443
 444         nb_data2( "Local Session No.: 0x%02x", 1, data_ptr, offset, tree);
 445
 446         nb_call_name_type( data_ptr, offset, tree);
 447         nb_xmit_corrl( data_ptr, offset, tree);
 448         nb_resp_corrl( data_ptr, offset, tree);
 449         netbios_add_name( "Receiver's Name", data_ptr, offset, NB_RECVER_NAME,
 450             tree);
 451         netbios_add_name( "Sender's Name", data_ptr, offset, NB_SENDER_NAME,
 452             tree);
 453 }
 454
 455 static void  dissect_netb_session_init(const u_char *data_ptr, int offset,
 456     frame_data *fd, proto_tree *tree)
 457
 458 {/* Handle the SESSION INITIATE command */
 459
 460         netbios_add_flags( data_ptr, tree, offset + NB_FLAGS);
 461
 462         nb_data2( "Max data recv size: %d", 2, data_ptr, offset, tree);
 463         nb_resp_corrl( data_ptr, offset, tree);
 464         nb_xmit_corrl( data_ptr, offset, tree);
 465         nb_remote_session( data_ptr, offset, tree);
 466         nb_local_session( data_ptr, offset, tree);
 467 }
 468
 469
 470 static void  dissect_netb_session_confirm(const u_char *data_ptr, int offset,
 471     frame_data *fd, proto_tree *tree)
 472
 473 {/* Handle the SESSION CONFIRM command */
 474
 475         netbios_add_ses_confirm_flags( data_ptr, tree, offset + NB_FLAGS);
 476
 477         nb_data2( "Max data recv size: %d", 2, data_ptr, offset, tree);
 478         nb_resp_corrl( data_ptr, offset, tree);
 479         nb_xmit_corrl( data_ptr, offset, tree);
 480         nb_remote_session( data_ptr, offset, tree);
 481         nb_local_session( data_ptr, offset, tree);
 482 }
 483
 484
 485 static void  dissect_netb_data_only_last(const u_char *data_ptr, int offset,
 486     frame_data *fd, proto_tree *tree)
 487
 488 {/* Handle the DATA ONLY LAST command */
 489
 490         netbios_data_only_flags( data_ptr, tree, offset + NB_FLAGS);
 491
 492         nb_data2( "Re-sync indicator: %d", 2, data_ptr, offset, tree);
 493         nb_resp_corrl( data_ptr, offset, tree);
 494         nb_remote_session( data_ptr, offset, tree);
 495         nb_local_session( data_ptr, offset, tree);
 496
 497 }
 498
 499
 500 static void  dissect_netb_datagram(const u_char *data_ptr, int offset,
 501     frame_data *fd, proto_tree *tree)
 502
 503 {/* Handle the DATAGRAM command */
 504
 505         nb_data1( "Data1: 0x%02x", data_ptr, offset, tree);
 506         nb_data2( "Data2: 0x%04x", 2, data_ptr, offset, tree);
 507         nb_xmit_corrl( data_ptr, offset, tree);
 508         nb_resp_corrl( data_ptr, offset, tree);
 509         netbios_add_name( "Receiver's Name", data_ptr, offset, NB_RECVER_NAME,
 510             tree);
 511         netbios_add_name( "Sender's Name", data_ptr, offset, NB_SENDER_NAME,
 512             tree);
 513
 514 }
 515
 516 static void  dissect_netb_data_ack(const u_char *data_ptr, int offset,
 517     frame_data *fd, proto_tree *tree)
 518
 519 {/* Handle the DATA ACK command */
 520
 521         netbios_data_only_flags( data_ptr, tree, offset + NB_FLAGS);
 522
 523
 524         nb_xmit_corrl( data_ptr, offset, tree);
 525         nb_remote_session( data_ptr, offset, tree);
 526         nb_local_session( data_ptr, offset, tree);
 527
 528 }
 529
 530
 531 /************************************************************************/
 532 /*                                                                      */
 533 /*  The table routines called by the top level to handle commands       */
 534 /*                                                                      */
 535 /************************************************************************/
 536
 537
 538 void (*dissect_netb[])(const u_char *, int, frame_data *, proto_tree *) = {
 539
 540   dissect_netb_add_group,       /* add_group    0x00 */
 541   dissect_netb_add_name,        /* add_name     0x01 */
 542   dissect_netb_unknown,         /* unknown      0x02 */
 543   dissect_netb_unknown,         /* unknown      0x03 */
 544   dissect_netb_unknown,         /* unknown      0x04 */
 545   dissect_netb_unknown,         /* unknown      0x05 */
 546   dissect_netb_unknown,         /* unknown      0x06 */
 547   dissect_netb_unknown,         /* unknown      0x07 */
 548   dissect_netb_datagram,        /* Datagram     0x08 */
 549   dissect_netb_unknown,         /* unknown      0x09 */
 550   dissect_netb_name_query,      /* Name Query   0x0A */
 551   dissect_netb_unknown,         /* unknown      0x0B */
 552   dissect_netb_unknown,         /* unknown      0x0C */
 553   dissect_netb_unknown,         /* unknown      0x0D */
 554   dissect_netb_name_resp,       /* Name Resp    0x0E */
 555   dissect_netb_unknown,         /* unknown      0x0F */
 556   dissect_netb_unknown,         /* unknown      0x10 */
 557   dissect_netb_unknown,         /* unknown      0x11 */
 558   dissect_netb_unknown,         /* unknown      0x12 */
 559   dissect_netb_unknown,         /* unknown      0x13 */
 560   dissect_netb_data_ack,        /* Data Ack     0x14 */
 561   dissect_netb_unknown,         /* unknown      0x15 */
 562   dissect_netb_data_only_last,  /* Data Only Last 0x16 */
 563   dissect_netb_session_confirm, /* Session Confirm 0x17 */
 564   dissect_netb_unknown,         /* unknown      0x18 */
 565   dissect_netb_session_init,    /* Session Initialize 0x19      */
 566   dissect_netb_unknown,         /* unknown      0x1A */
 567   dissect_netb_unknown,         /* unknown      0x1B */
 568   dissect_netb_unknown,         /* unknown      0x1C */
 569   dissect_netb_unknown,         /* unknown      0x1D */
 570   dissect_netb_unknown,         /* unknown      0x1E */
 571
 572   dissect_netb_unknown,         /* Session Alive        0x1f (nothing to do) */
 573 };
 574
 575
 576 void dissect_netbios(const u_char *pd, int offset, frame_data *fd,
 577     proto_tree *tree)
 578
 579 {
 580         const u_char            *nb_data_ptr;
 581         proto_tree              *netb_tree;
 582         proto_item              *ti;
 583         guint16                 hdr_len, command;
 584         char                    name[17];
 585
 586         nb_data_ptr = &pd[offset];
 587
 588 /* Find NetBIOS marker EFFF, this is done because I have seen an extra LLC */
 589 /* byte on our network. This only checks for one extra LLC byte. */
 590
 591         if (( *(nb_data_ptr + 2) != 0xff) || ( *(nb_data_ptr + 3) != 0xef)){
 592
 593                 ++nb_data_ptr;          /** marker not found shift one byte */
 594                 ++offset;
 595                 if (( *(nb_data_ptr + 2) != 0xff)
 596                     || ( *(nb_data_ptr + 3) != 0xef)){
 597                         if (check_col(fd, COL_PROTOCOL))
 598                                 col_add_str(fd, COL_PROTOCOL, "NetBIOS");
 599
 600                         if (check_col(fd, COL_INFO))    /* print bad packet */
 601                                 col_add_str(fd, COL_INFO, "Bad packet");
 602
 603                         if (tree) {
 604                                 ti = proto_tree_add_item(tree, proto_netbios,
 605                                         offset, END_OF_FRAME, NULL);
 606                                 netb_tree = proto_item_add_subtree(ti, ETT_NETB);
 607
 608                                 proto_tree_add_text( netb_tree, offset,
 609                                     END_OF_FRAME, "Data (%u bytes)",
 610                                     END_OF_FRAME);
 611                         }
 612                         return;
 613                 }
 614         }
 615
 616         /* To do: check for runts, errs, etc. */
 617
 618         hdr_len = pletohs( nb_data_ptr + NB_LENGTH);
 619         command = *(nb_data_ptr + NB_COMMAND);
 620
 621
 622         if ( command == NB_NAME_QUERY ) {
 623                 get_netbios_name( pd, offset + 12, name);
 624         }
 625
 626         if ( command == NB_NAME_RESP ){
 627                 get_netbios_name( pd, offset + 28, name);
 628         }
 629
 630
 631         if (check_col(fd, COL_PROTOCOL))
 632                 col_add_str(fd, COL_PROTOCOL, "NetBIOS");
 633
 634         if (check_col(fd, COL_INFO)) {                  /* print command name */
 635                 if ( command == NB_NAME_QUERY)
 636                         col_add_fstr(fd, COL_INFO, "%s for %s",
 637                             CommandName[ command], name);
 638
 639                 else if ( command == NB_NAME_RESP)
 640                         col_add_fstr(fd, COL_INFO, "%s - %s",
 641                             CommandName[ command], name);
 642
 643                 else
 644                         col_add_fstr(fd, COL_INFO, "%s", CommandName[ command]);
 645         }
 646
 647
 648         if (tree) {
 649                 ti = proto_tree_add_item(tree, proto_netbios, offset, END_OF_FRAME, NULL);
 650
 651                 netb_tree = proto_item_add_subtree(ti, ETT_NETB);
 652
 653                 proto_tree_add_text(netb_tree, offset, 2,
 654                                 "Header Length: %d", hdr_len);
 655
 656                 proto_tree_add_text(netb_tree, offset + 2, 2,
 657                                 "Delimiter: EFFF (NetBIOS)");
 658
 659                 proto_tree_add_text(netb_tree, offset + NB_COMMAND, 1,
 660                     "Command: 0x%02x (%s)", command, CommandName[ command]);
 661
 662                                                 /* if command in table range */
 663                 if ( command < sizeof( dissect_netb)/ sizeof(void *))
 664
 665                                                 /* branch to handle commands */
 666                         (dissect_netb[ command])( nb_data_ptr, offset, fd,
 667                                 netb_tree);
 668         }
 669
 670                                                         /* Test for SMB data */
 671         if ( (END_OF_FRAME) > ( hdr_len + 4)){          /* if enough data */
 672
 673                 nb_data_ptr += hdr_len;                 /* move past header */
 674
 675                 if (( *nb_data_ptr == 0xff) &&          /* if SMB marker */
 676                     ( *(nb_data_ptr + 1) == 'S') &&
 677                     ( *(nb_data_ptr + 2) == 'M') &&
 678                     ( *(nb_data_ptr + 3) == 'B'))
 679                                                         /* decode SMB */
 680                         dissect_smb(pd, offset + hdr_len, fd, tree,
 681                                 END_OF_FRAME - hdr_len);
 682         }
 683
 684 /*$$$$ somewhere around here need to check for frame padding */
 685
 686 }
 687
 688
 689 void proto_register_netbios(void)
 690 {
 691
 692         proto_netbios = proto_register_protocol("NetBIOS", "netbios");
 693 }