packet-nbipx.c

   1 /* packet-nbipx.c
   2  * Routines for NetBIOS over IPX packet disassembly
   3  * Gilbert Ramirez <gram@xiexie.org>
   4  *
   5  * $Id: packet-nbipx.c,v 1.17 2000/01/22 06:22:14 guy 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 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #ifdef HAVE_SYS_TYPES_H
  32 # include <sys/types.h>
  33 #endif
  34
  35 #include <glib.h>
  36 #include "packet.h"
  37 #include "packet-ipx.h" /* for ipxnet_to_string() */
  38 #include "packet-netbios.h"
  39
  40 static int proto_nbipx = -1;
  41
  42 static gint ett_nbipx = -1;
  43 static gint ett_nbipx_name_type_flags = -1;
  44
  45 enum nbipx_protocol {
  46         NETBIOS_NETWARE,
  47         NETBIOS_NWLINK
  48 };
  49
  50 static void
  51 dissect_nbipx_ns(const u_char *pd, int offset, frame_data *fd, proto_tree *tree,
  52                 int max_data);
  53 static void
  54 dissect_nbipx_dg(const u_char *pd, int offset, frame_data *fd, proto_tree *tree,
  55                 int max_data);
  56
  57 /* There is no RFC or public specification of Netware or Microsoft
  58  * NetBIOS over IPX packets. I have had to decode the protocol myself,
  59  * so there are holes and perhaps errors in this code. (gram)
  60  *
  61  * A list of "NovelNetBIOS" packet types can be found at
  62  *
  63  *      http://www.protocols.com/pbook/novel.htm#NetBIOS
  64  *
  65  * and at least some of those packet types appear to match what's in
  66  * some NBIPX packets.
  67  *
  68  * Note, however, that the offset of the packet type in an NBIPX packet
  69  * *DEPENDS ON THE PACKET TYPE*; "Find name" and "Name recognized" have
  70  * it at one offset, "Directed datagram" has it at another.  Does the
  71  * NBIPX code base it on the length, or what?  Non-broadcast directed
  72  * datagram packets have an IPX type of "IPX", just as "Find name" and
  73  * "Name recognized" do....  For now, we base it on the length.
  74  */
  75 #define NBIPX_FIND_NAME         1
  76 #define NBIPX_NAME_RECOGNIZED   2
  77 #define NBIPX_CHECK_NAME        3
  78 #define NBIPX_NAME_IN_USE       4
  79 #define NBIPX_DEREGISTER_NAME   5
  80 #define NBIPX_SESSION_DATA      6
  81 #define NBIPX_SESSION_END       7
  82 #define NBIPX_SESSION_END_ACK   8
  83 #define NBIPX_STATUS_QUERY      9
  84 #define NBIPX_STATUS_RESPONSE   10
  85 #define NBIPX_DIRECTED_DATAGRAM 11
  86
  87 static const value_string nbipx_data_stream_type_vals[] = {
  88         {NBIPX_FIND_NAME,               "Find name"},
  89         {NBIPX_NAME_RECOGNIZED,         "Name recognized"},
  90         {NBIPX_CHECK_NAME,              "Check name"},
  91         {NBIPX_NAME_IN_USE,             "Name in use"},
  92         {NBIPX_DEREGISTER_NAME,         "Deregister name"},
  93         {NBIPX_SESSION_DATA,            "Session data"},
  94         {NBIPX_SESSION_END,             "Session end"},
  95         {NBIPX_SESSION_END_ACK,         "Session end ACK"},
  96         {NBIPX_STATUS_QUERY,            "Status query"},
  97         {NBIPX_STATUS_RESPONSE,         "Status response"},
  98         {NBIPX_DIRECTED_DATAGRAM,       "Directed datagram"},
  99         {0,                             NULL}
 100 };
 101
 102 #define NWLINK_NAME_QUERY       1
 103 #define NWLINK_SMB              2
 104 #define NWLINK_NETBIOS_DATAGRAM 3
 105
 106 static const value_string nwlink_data_stream_type_vals[] = {
 107         {NWLINK_NAME_QUERY,             "Name query"},
 108         {NWLINK_SMB,                    "SMB"},
 109         {NWLINK_NETBIOS_DATAGRAM,       "NetBIOS datagram"},
 110         {0,                             NULL}
 111 };
 112
 113 /* NetWare */
 114 void
 115 dissect_nbipx(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
 116 {
 117         int     max_data = pi.captured_len - offset;
 118
 119         if (check_col(fd, COL_PROTOCOL))
 120                 col_add_str(fd, COL_PROTOCOL, "NBIPX");
 121
 122         /*
 123          * As said above, we look at the length of the packet to decide
 124          * whether to treat it as a name-service packet or a datagram
 125          * (the packet type would tell us, but it's at a *DIFFERENT
 126          * LOCATION* in different types of packet...).
 127          */
 128         if (END_OF_FRAME == 50)
 129                 dissect_nbipx_ns(pd, offset, fd, tree, max_data);
 130         else
 131                 dissect_nbipx_dg(pd, offset, fd, tree, max_data);
 132 }
 133
 134 static void
 135 add_routers(proto_tree *tree, const u_char *pd, int offset)
 136 {
 137         int             i;
 138         int             rtr_offset;
 139         guint32         router;
 140
 141         /* Eight routers are listed */
 142         for (i = 0; i < 8; i++) {
 143                 rtr_offset = offset + (i << 2);
 144                 memcpy(&router, &pd[rtr_offset], 4);
 145                 if (router != 0) {
 146                         proto_tree_add_text(tree, rtr_offset, 4, "IPX Network: %s",
 147                                         ipxnet_to_string((guint8*)&router));
 148                 }
 149         }
 150 }
 151
 152 static void
 153 dissect_nbipx_ns(const u_char *pd, int offset, frame_data *fd, proto_tree *tree,
 154                 int max_data)
 155 {
 156         proto_tree              *nbipx_tree;
 157         proto_item              *ti;
 158         guint8                  packet_type;
 159         guint8                  name_type_flag;
 160         proto_tree              *name_type_flag_tree;
 161         proto_item              *tf;
 162         char                    name[(NETBIOS_NAME_LEN - 1)*4 + 1];
 163         int                     name_type;
 164
 165         name_type_flag = pd[offset+32];
 166         packet_type = pd[offset+33];
 167         name_type = get_netbios_name(pd, offset+34, name);
 168
 169         if (check_col(fd, COL_INFO)) {
 170                 switch (packet_type) {
 171                 case NBIPX_FIND_NAME:
 172                 case NBIPX_NAME_RECOGNIZED:
 173                 case NBIPX_CHECK_NAME:
 174                 case NBIPX_NAME_IN_USE:
 175                 case NBIPX_DEREGISTER_NAME:
 176                         col_add_fstr(fd, COL_INFO, "%s %s<%02x>",
 177                                 val_to_str(packet_type, nbipx_data_stream_type_vals, "Unknown"),
 178                                 name, name_type);
 179                         break;
 180
 181                 default:
 182                         col_add_fstr(fd, COL_INFO, "%s",
 183                                 val_to_str(packet_type, nbipx_data_stream_type_vals, "Unknown"));
 184                         break;
 185                 }
 186         }
 187
 188         if (tree) {
 189                 ti = proto_tree_add_item(tree, proto_nbipx, offset, 50, NULL);
 190                 nbipx_tree = proto_item_add_subtree(ti, ett_nbipx);
 191
 192                 add_routers(nbipx_tree, pd, offset);
 193
 194                 tf = proto_tree_add_text(nbipx_tree, offset+32, 1,
 195                         "Name type flag: 0x%02x", name_type_flag);
 196                 name_type_flag_tree = proto_item_add_subtree(tf,
 197                                 ett_nbipx_name_type_flags);
 198                 proto_tree_add_text(name_type_flag_tree, offset+32,
 199                     1, "%s",
 200                     decode_boolean_bitfield(name_type_flag, 0x80, 8,
 201                       "Group name", "Unique name"));
 202                 proto_tree_add_text(name_type_flag_tree, offset+32,
 203                     1, "%s",
 204                     decode_boolean_bitfield(name_type_flag, 0x40, 8,
 205                       "Name in use", "Name not used"));
 206                 proto_tree_add_text(name_type_flag_tree, offset+32,
 207                     1, "%s",
 208                     decode_boolean_bitfield(name_type_flag, 0x04, 8,
 209                       "Name registered", "Name not registered"));
 210                 proto_tree_add_text(name_type_flag_tree, offset+32,
 211                     1, "%s",
 212                     decode_boolean_bitfield(name_type_flag, 0x02, 8,
 213                       "Name duplicated", "Name not duplicated"));
 214                 proto_tree_add_text(name_type_flag_tree, offset+32,
 215                     1, "%s",
 216                     decode_boolean_bitfield(name_type_flag, 0x01, 8,
 217                       "Name deregistered", "Name not deregistered"));
 218
 219                 proto_tree_add_text(nbipx_tree, offset+33, 1,
 220                         "Packet Type: %s (%02X)",
 221                         val_to_str(packet_type, nbipx_data_stream_type_vals, "Unknown"),
 222                         packet_type);
 223
 224                 netbios_add_name("Name", pd, offset + 34,
 225                                 nbipx_tree);
 226         }
 227 }
 228
 229 static void
 230 dissect_nbipx_dg(const u_char *pd, int offset, frame_data *fd, proto_tree *tree,
 231                 int max_data)
 232 {
 233         proto_tree                      *nbipx_tree;
 234         proto_item                      *ti;
 235
 236         if (check_col(fd, COL_INFO))
 237                 col_add_fstr(fd, COL_INFO, "NetBIOS datagram over NBIPX");
 238
 239         if (tree) {
 240                 ti = proto_tree_add_item(tree, proto_nbipx, offset,
 241                     2+NETBIOS_NAME_LEN+NETBIOS_NAME_LEN, NULL);
 242                 nbipx_tree = proto_item_add_subtree(ti, ett_nbipx);
 243
 244                 proto_tree_add_text(nbipx_tree, offset, 1,
 245                     "Connection control: 0x%02x", pd[offset]);
 246                 offset += 1;
 247                 max_data -= 1;
 248
 249                 if (!BYTES_ARE_IN_FRAME(offset, 1))
 250                         return;
 251                 proto_tree_add_text(nbipx_tree, offset, 1,
 252                                 "Packet Type: %s (%02X)",
 253                                 val_to_str(pd[offset], nbipx_data_stream_type_vals, "Unknown"),
 254                                 pd[offset]);
 255                 offset += 1;
 256                 max_data -= 1;
 257
 258                 if (!netbios_add_name("Receiver's Name", pd, offset,
 259                     nbipx_tree))
 260                         return;
 261                 offset += NETBIOS_NAME_LEN;
 262                 max_data -= NETBIOS_NAME_LEN;
 263
 264                 if (!netbios_add_name("Sender's Name", pd, offset,
 265                     nbipx_tree))
 266                         return;
 267                 offset += NETBIOS_NAME_LEN;
 268                 max_data -= NETBIOS_NAME_LEN;
 269
 270                 if (max_data != 0)
 271                         dissect_smb(pd, offset, fd, tree, max_data);
 272         }
 273 }
 274
 275 void
 276 dissect_nwlink_dg(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
 277 {
 278         int             max_data = pi.captured_len - offset;
 279         proto_tree      *nbipx_tree;
 280         proto_item      *ti;
 281         guint8          packet_type;
 282         guint8          name_type_flag;
 283         proto_tree      *name_type_flag_tree;
 284         proto_item      *tf;
 285         char            name[(NETBIOS_NAME_LEN - 1)*4 + 1];
 286         int             name_type;
 287         char            node_name[(NETBIOS_NAME_LEN - 1)*4 + 1];
 288         int             node_name_type = 0;
 289
 290         name_type_flag = pd[offset+32];
 291         packet_type = pd[offset+33];
 292         name_type = get_netbios_name(pd, offset+36, name);
 293         node_name_type = get_netbios_name(pd, offset+52, node_name);
 294
 295         if (check_col(fd, COL_PROTOCOL))
 296                 col_add_str(fd, COL_PROTOCOL, "NWLink");
 297
 298         if (check_col(fd, COL_INFO)) {
 299                 /*
 300                  * XXX - Microsoft Network Monitor thinks that the octet
 301                  * at 32 is a packet type, e.g. "mailslot write" for
 302                  * browser announcements, and that the octet at 33 is a
 303                  * name type, in the sense of the 16th byte of a
 304                  * NetBIOS name.
 305                  *
 306                  * A name type of 2 shows up in a "host announcement",
 307                  * and a name type of 3 shows up in a "local master
 308                  * annoumcement", so maybe that field really *is* a
 309                  * name type - the fact that it's not associated with
 310                  * any of the NetBIOS names in the packet nonwithstanding.
 311                  *
 312                  * I haven't seen any packets with the name type octet
 313                  * being anything other than 2 or 3, so I don't know
 314                  * whether those are name service operations; however,
 315                  * given that NWLink, unlike socket-0x0455 NBIPX,
 316                  * has separate sockets for name queries and datagrams,
 317                  * it may be that this really is a name type, and that
 318                  * these are all datagrams, not name queries.
 319                  */
 320                 switch (packet_type) {
 321                 case NWLINK_NAME_QUERY:
 322                         col_add_fstr(fd, COL_INFO, "Name Query for %s<%02x>",
 323                                         name, name_type);
 324                         break;
 325
 326                 case NWLINK_SMB:
 327                         /* Session? */
 328                         col_add_fstr(fd, COL_INFO, "SMB over NBIPX");
 329                         break;
 330
 331                 case NWLINK_NETBIOS_DATAGRAM:
 332                         /* Datagram? (Where did we see this?) */
 333                         col_add_fstr(fd, COL_INFO, "NetBIOS datagram over NBIPX");
 334                         break;
 335
 336                 default:
 337                         col_add_str(fd, COL_INFO, "NetBIOS over IPX (NWLink)");
 338                         break;
 339                 }
 340         }
 341
 342         if (tree) {
 343                 ti = proto_tree_add_item(tree, proto_nbipx, offset, 68, NULL);
 344                 nbipx_tree = proto_item_add_subtree(ti, ett_nbipx);
 345
 346                 add_routers(nbipx_tree, pd, offset);
 347
 348                 /*
 349                  * XXX - is "packet_type" really a packet type?  See
 350                  * above.
 351                  */
 352                 if (packet_type != NWLINK_SMB &&
 353                       packet_type != NWLINK_NETBIOS_DATAGRAM) {
 354                         tf = proto_tree_add_text(nbipx_tree, offset+32, 1,
 355                                 "Name type flag: 0x%02x",
 356                                 name_type_flag);
 357                         name_type_flag_tree = proto_item_add_subtree(tf,
 358                                         ett_nbipx_name_type_flags);
 359                         proto_tree_add_text(name_type_flag_tree, offset+32,
 360                             1, "%s",
 361                             decode_boolean_bitfield(name_type_flag, 0x80, 8,
 362                               "Group name", "Unique name"));
 363                         proto_tree_add_text(name_type_flag_tree, offset+32,
 364                             1, "%s",
 365                             decode_boolean_bitfield(name_type_flag, 0x40, 8,
 366                               "Name in use", "Name not used"));
 367                         proto_tree_add_text(name_type_flag_tree, offset+32,
 368                             1, "%s",
 369                             decode_boolean_bitfield(name_type_flag, 0x04, 8,
 370                               "Name registered", "Name not registered"));
 371                         proto_tree_add_text(name_type_flag_tree, offset+32,
 372                             1, "%s",
 373                             decode_boolean_bitfield(name_type_flag, 0x02, 8,
 374                               "Name duplicated", "Name not duplicated"));
 375                         proto_tree_add_text(name_type_flag_tree, offset+32,
 376                             1, "%s",
 377                             decode_boolean_bitfield(name_type_flag, 0x01, 8,
 378                               "Name deregistered", "Name not deregistered"));
 379
 380                         if (!netbios_add_name("Group name", pd, offset+36,
 381                             nbipx_tree))
 382                                 return;
 383                         if (!netbios_add_name("Node name", pd, offset+52,
 384                             nbipx_tree))
 385                                 return;
 386                         proto_tree_add_text(nbipx_tree, offset+33, 1,
 387                             "Packet Type: %s (%02X)",
 388                             val_to_str(packet_type, nwlink_data_stream_type_vals, "Unknown"),
 389                             packet_type);
 390                 } else {
 391                         proto_tree_add_text(nbipx_tree, offset+32, 1,
 392                             "Packet type: 0x%02x", name_type_flag);
 393                         proto_tree_add_text(nbipx_tree, offset+33, 1,
 394                             "Name Type: %s (0x%02x)",
 395                             netbios_name_type_descr(packet_type),
 396                             packet_type);
 397                         proto_tree_add_text(nbipx_tree, offset+34, 2,
 398                             "Message ID: 0x%04x", pletohs(&pd[offset+34]));
 399                         if (!netbios_add_name("Requested name", pd, offset+36,
 400                             nbipx_tree))
 401                                 return;
 402                         if (!netbios_add_name("Source name", pd, offset+52,
 403                             nbipx_tree))
 404                                 return;
 405                 }
 406         }
 407
 408         offset += 68;
 409         max_data -= 68;
 410
 411         if (max_data != 0) {
 412                 switch (packet_type) {
 413                 case NWLINK_SMB:
 414                 case NWLINK_NETBIOS_DATAGRAM:
 415                         dissect_smb(pd, offset, fd, tree, max_data);
 416                         break;
 417
 418                 default:
 419                         dissect_data(pd, offset, fd, tree);
 420                         break;
 421                 }
 422         }
 423 }
 424
 425 void
 426 proto_register_nbipx(void)
 427 {
 428 /*        static hf_register_info hf[] = {
 429                 { &variable,
 430                 { "Name",           "nbipx.abbreviation", TYPE, VALS_POINTER }},
 431         };*/
 432         static gint *ett[] = {
 433                 &ett_nbipx,
 434                 &ett_nbipx_name_type_flags,
 435         };
 436
 437         proto_nbipx = proto_register_protocol("NetBIOS over IPX", "nbipx");
 438  /*       proto_register_field_array(proto_nbipx, hf, array_length(hf));*/
 439         proto_register_subtree_array(ett, array_length(ett));
 440 }