epan/dissectors/packet-ipxwan.c

   1 /* packet-ipxwan.c
   2  * Routines for NetWare IPX WAN Protocol
   3  *
   4  * Wireshark - Network traffic analyzer
   5  * By Gerald Combs <gerald@wireshark.org>
   6  * Copyright 1998 Gerald Combs
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version 2
  11  * of the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #include "config.h"
  24
  25 #include <epan/packet.h>
  26 #include <epan/expert.h>
  27 #include "packet-ipx.h"
  28
  29 void proto_register_ipxwan(void);
  30 void proto_reg_handoff_ipxwan(void);
  31
  32 /*
  33  * See RFC 1362 for version 1 of this protocol; see the NetWare Link
  34  * Services Protocol Specification, chapter 3, for version 2.
  35  */
  36 static int proto_ipxwan = -1;
  37
  38 static int hf_ipxwan_identifier = -1;
  39 static int hf_ipxwan_packet_type = -1;
  40 static int hf_ipxwan_node_id = -1;
  41 static int hf_ipxwan_sequence_number = -1;
  42 static int hf_ipxwan_num_options = -1;
  43 static int hf_ipxwan_option_num = -1;
  44 static int hf_ipxwan_accept_option = -1;
  45 static int hf_ipxwan_option_data_len = -1;
  46 static int hf_ipxwan_routing_type = -1;
  47 static int hf_ipxwan_wan_link_delay = -1;
  48 static int hf_ipxwan_common_network_number = -1;
  49 static int hf_ipxwan_router_name = -1;
  50 static int hf_ipxwan_delay = -1;
  51 static int hf_ipxwan_throughput = -1;
  52 static int hf_ipxwan_request_size = -1;
  53 static int hf_ipxwan_delta_time = -1;
  54 static int hf_ipxwan_extended_node_id = -1;
  55 static int hf_ipxwan_node_number = -1;
  56 static int hf_ipxwan_compression_type = -1;
  57 static int hf_ipxwan_compression_options = -1;
  58 static int hf_ipxwan_compression_slots = -1;
  59 static int hf_ipxwan_compression_parameters = -1;
  60 static int hf_ipxwan_padding = -1;
  61 static int hf_ipxwan_option_value = -1;
  62
  63 static gint ett_ipxwan = -1;
  64 static gint ett_ipxwan_option = -1;
  65
  66 static expert_field ei_ipxwan_option_data_len = EI_INIT;
  67
  68 static const value_string ipxwan_packet_type_vals[] = {
  69         { 0,    "Timer Request" },
  70         { 1,    "Timer Response" },
  71         { 2,    "Information Request" },
  72         { 3,    "Information Response" },
  73         { 4,    "Throughput Request" },
  74         { 5,    "Throughput Response" },
  75         { 6,    "Delay Request" },
  76         { 7,    "Delay Response" },
  77         { 0xFF, "NAK" },
  78         { 0,    NULL }
  79 };
  80
  81 #define OPT_ROUTING_TYPE                0x00
  82 #define OPT_RIP_SAP_INFO_EXCHANGE       0x01
  83 #define OPT_NLSP_INFORMATION            0x02
  84 #define OPT_NLSP_RAW_THROUGHPUT_DATA    0x03
  85 #define OPT_EXTENDED_NODE_ID            0x04
  86 #define OPT_NODE_NUMBER                 0x05
  87 #define OPT_COMPRESSION                 0x80
  88 #define OPT_PAD                         0xFF
  89
  90 static const value_string ipxwan_option_num_vals[] = {
  91         { OPT_ROUTING_TYPE,             "Routing Type" },
  92         { OPT_RIP_SAP_INFO_EXCHANGE,    "RIP/SAP Info Exchange" },
  93         { OPT_NLSP_INFORMATION,         "NLSP Information" },
  94         { OPT_NLSP_RAW_THROUGHPUT_DATA, "NLSP Raw Throughput Data" },
  95         { OPT_EXTENDED_NODE_ID,         "Extended Node ID" },
  96         { OPT_NODE_NUMBER,              "Node Number" },
  97         { OPT_COMPRESSION,              "Compression" },
  98         { OPT_PAD,                      "Pad" },
  99         { 0,                            NULL }
 100 };
 101
 102 static const value_string ipxwan_accept_option_vals[] = {
 103         { 0, "No" },
 104         { 1, "Yes" },
 105         { 3, "Not Applicable" },
 106         { 0, NULL }
 107 };
 108
 109 static const value_string ipxwan_routing_type_vals[] = {
 110         { 0, "RIP" },
 111         { 1, "NLSP" },
 112         { 2, "Unnumbered RIP" },
 113         { 3, "On-demand, static routing" },
 114         { 4, "Client-router connection" },
 115         { 0, NULL }
 116 };
 117
 118 #define COMP_TYPE_TELEBIT       0
 119
 120 static const value_string ipxwan_compression_type_vals[] = {
 121         { COMP_TYPE_TELEBIT, "Telebit" },
 122         { 0,                 NULL }
 123 };
 124
 125 static int
 126 dissect_ipxwan(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
 127 {
 128         proto_item *ti;
 129         proto_tree *ipxwan_tree = NULL;
 130         int offset = 0;
 131         guint8 packet_type;
 132         guint8 num_options;
 133         guint8 option_number;
 134         proto_tree *option_tree;
 135         guint16 option_data_len;
 136         guint16 wan_link_delay;
 137         guint32 delay;
 138         guint32 throughput;
 139         guint32 delta_time;
 140         guint8 compression_type;
 141
 142         col_set_str(pinfo->cinfo, COL_PROTOCOL, "IPX WAN");
 143         col_clear(pinfo->cinfo, COL_INFO);
 144
 145         ti = proto_tree_add_item(tree, proto_ipxwan, tvb, 0, -1,
 146                 ENC_NA);
 147         ipxwan_tree = proto_item_add_subtree(ti, ett_ipxwan);
 148
 149         proto_tree_add_item(ipxwan_tree, hf_ipxwan_identifier, tvb,
 150                     offset, 4, ENC_ASCII|ENC_NA);
 151
 152         offset += 4;
 153         packet_type = tvb_get_guint8(tvb, offset);
 154         col_add_str(pinfo->cinfo, COL_INFO,
 155                     val_to_str(packet_type, ipxwan_packet_type_vals,
 156                         "Unknown packet type %u"));
 157
 158         proto_tree_add_uint(ipxwan_tree, hf_ipxwan_packet_type, tvb,
 159                 offset, 1, packet_type);
 160         offset += 1;
 161         proto_tree_add_item(ipxwan_tree, hf_ipxwan_node_id, tvb,
 162                 offset, 4, ENC_BIG_ENDIAN);
 163         offset += 4;
 164         proto_tree_add_item(ipxwan_tree, hf_ipxwan_sequence_number, tvb,
 165                 offset, 1, ENC_BIG_ENDIAN);
 166         offset += 1;
 167         num_options = tvb_get_guint8(tvb, offset);
 168         proto_tree_add_uint(ipxwan_tree, hf_ipxwan_num_options, tvb,
 169                 offset, 1, num_options);
 170         offset += 1;
 171
 172         while (num_options != 0) {
 173                 option_number = tvb_get_guint8(tvb, offset);
 174                 option_tree = proto_tree_add_subtree_format(ipxwan_tree, tvb, offset, -1,
 175                         ett_ipxwan_option, &ti, "Option: %s",
 176                         val_to_str(option_number, ipxwan_option_num_vals,
 177                             "Unknown (%u)"));
 178
 179                 proto_tree_add_uint(option_tree, hf_ipxwan_option_num,
 180                         tvb, offset, 1, option_number);
 181                 offset += 1;
 182                 proto_tree_add_item(option_tree, hf_ipxwan_accept_option,
 183                         tvb, offset, 1, ENC_BIG_ENDIAN);
 184                 offset += 1;
 185                 option_data_len = tvb_get_ntohs(tvb, offset);
 186                 proto_tree_add_uint(option_tree, hf_ipxwan_option_data_len,
 187                         tvb, offset, 2, option_data_len);
 188                 offset += 2;
 189                 proto_item_set_len(ti, option_data_len+4);
 190                 switch (option_number) {
 191
 192                 case OPT_ROUTING_TYPE:
 193                         if (option_data_len != 1) {
 194                                 expert_add_info_format(pinfo, ti, &ei_ipxwan_option_data_len,
 195                                         "Bogus length: %u, should be 1", option_data_len);
 196                         } else {
 197                                 proto_tree_add_item(option_tree,
 198                                         hf_ipxwan_routing_type, tvb,
 199                                         offset, 1, ENC_BIG_ENDIAN);
 200                         }
 201                         break;
 202
 203                 case OPT_RIP_SAP_INFO_EXCHANGE:
 204                         if (option_data_len != 54) {
 205                                 expert_add_info_format(pinfo, ti, &ei_ipxwan_option_data_len,
 206                                         "Bogus length: %u, should be 54", option_data_len);
 207                         } else {
 208                                 wan_link_delay = tvb_get_ntohs(tvb,
 209                                         offset);
 210                                 proto_tree_add_uint_format_value(option_tree,
 211                                         hf_ipxwan_wan_link_delay, tvb,
 212                                         offset, 2, wan_link_delay,
 213                                         "%ums",
 214                                         wan_link_delay);
 215                                 proto_tree_add_item(option_tree,
 216                                         hf_ipxwan_common_network_number,
 217                                         tvb, offset+2, 4, ENC_NA);
 218                                 proto_tree_add_item(option_tree,
 219                                         hf_ipxwan_router_name, tvb,
 220                                         offset+6, 48, ENC_ASCII|ENC_NA);
 221                         }
 222                         break;
 223
 224                 case OPT_NLSP_INFORMATION:
 225                         if (option_data_len != 8) {
 226                                 expert_add_info_format(pinfo, ti, &ei_ipxwan_option_data_len,
 227                                         "Bogus length: %u, should be 8", option_data_len);
 228                         } else {
 229                                 delay = tvb_get_ntohl(tvb, offset);
 230                                 proto_tree_add_uint_format_value(option_tree,
 231                                         hf_ipxwan_delay, tvb,
 232                                         offset, 4, delay,
 233                                         "%uus", delay);
 234                                 throughput = tvb_get_ntohl(tvb, offset);
 235                                 proto_tree_add_uint_format_value(option_tree,
 236                                         hf_ipxwan_throughput, tvb,
 237                                         offset, 4, throughput,
 238                                         "%uus",
 239                                         throughput);
 240                         }
 241                         break;
 242
 243                 case OPT_NLSP_RAW_THROUGHPUT_DATA:
 244                         if (option_data_len != 8) {
 245                                 expert_add_info_format(pinfo, ti, &ei_ipxwan_option_data_len,
 246                                         "Bogus length: %u, should be 8", option_data_len);
 247                         } else {
 248                                 proto_tree_add_item(option_tree,
 249                                         hf_ipxwan_request_size, tvb,
 250                                         offset, 4, ENC_BIG_ENDIAN);
 251                                 delta_time = tvb_get_ntohl(tvb, offset);
 252                                 proto_tree_add_uint_format_value(option_tree,
 253                                         hf_ipxwan_delta_time, tvb,
 254                                         offset, 4, delta_time,
 255                                         "%uus",
 256                                         delta_time);
 257                         }
 258                         break;
 259
 260                 case OPT_EXTENDED_NODE_ID:
 261                         if (option_data_len != 4) {
 262                                 expert_add_info_format(pinfo, ti, &ei_ipxwan_option_data_len,
 263                                         "Bogus length: %u, should be 4", option_data_len);
 264                         } else {
 265                                 proto_tree_add_item(option_tree,
 266                                         hf_ipxwan_extended_node_id, tvb,
 267                                         offset, 4, ENC_NA);
 268                         }
 269                         break;
 270
 271                 case OPT_NODE_NUMBER:
 272                         if (option_data_len != 6) {
 273                                 expert_add_info_format(pinfo, ti, &ei_ipxwan_option_data_len,
 274                                         "Bogus length: %u, should be 6", option_data_len);
 275                         } else {
 276                                 proto_tree_add_item(option_tree,
 277                                         hf_ipxwan_node_number, tvb,
 278                                         offset, 6, ENC_NA);
 279                         }
 280                         break;
 281
 282                 case OPT_COMPRESSION:
 283                         if (option_data_len < 1) {
 284                                 expert_add_info_format(pinfo, ti, &ei_ipxwan_option_data_len,
 285                                         "Bogus length: %u, should be >= 1", option_data_len);
 286                         } else {
 287                                 compression_type = tvb_get_guint8(tvb,
 288                                         offset);
 289                                 ti = proto_tree_add_uint(option_tree,
 290                                         hf_ipxwan_compression_type, tvb,
 291                                         offset, 1, compression_type);
 292                                 switch (compression_type) {
 293
 294                                 case COMP_TYPE_TELEBIT:
 295                                         if (option_data_len < 3) {
 296                                                 expert_add_info_format(pinfo, ti, &ei_ipxwan_option_data_len,
 297                                                         "Bogus length: %u, should be >= 3", option_data_len);
 298                                         } else {
 299                                                 proto_tree_add_item(option_tree, hf_ipxwan_compression_options,
 300                                                         tvb, offset+1, 1, ENC_BIG_ENDIAN);
 301                                                 proto_tree_add_item(option_tree, hf_ipxwan_compression_slots,
 302                                                         tvb, offset+2, 1, ENC_BIG_ENDIAN);
 303                                         }
 304                                         break;
 305
 306                                 default:
 307                                         proto_tree_add_item(option_tree, hf_ipxwan_compression_parameters,
 308                                                 tvb, offset+1, option_data_len-1, ENC_NA);
 309                                         break;
 310                                 }
 311                         }
 312                         break;
 313
 314                 case OPT_PAD:
 315                         proto_tree_add_item(option_tree, hf_ipxwan_padding,
 316                                 tvb, offset, option_data_len, ENC_NA);
 317                         break;
 318
 319                 default:
 320                         proto_tree_add_item(option_tree, hf_ipxwan_option_value,
 321                                 tvb, offset, option_data_len, ENC_NA);
 322                         break;
 323                 }
 324
 325                 offset += option_data_len;
 326                 num_options--;
 327         }
 328         return tvb_captured_length(tvb);
 329 }
 330
 331 void
 332 proto_register_ipxwan(void)
 333 {
 334         static hf_register_info hf[] = {
 335             { &hf_ipxwan_identifier,
 336               { "Identifier",   "ipxwan.identifier",
 337                 FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
 338
 339             { &hf_ipxwan_packet_type,
 340               { "Packet Type", "ipxwan.packet_type",
 341                 FT_UINT8, BASE_DEC, VALS(ipxwan_packet_type_vals), 0x0, NULL,
 342                 HFILL }},
 343
 344             { &hf_ipxwan_node_id,
 345               { "Node ID", "ipxwan.node_id", FT_UINT32,
 346                  BASE_HEX, NULL, 0x0, NULL, HFILL }},
 347
 348             { &hf_ipxwan_sequence_number,
 349               { "Sequence Number", "ipxwan.sequence_number", FT_UINT8,
 350                  BASE_DEC, NULL, 0x0, NULL, HFILL }},
 351
 352             { &hf_ipxwan_num_options,
 353               { "Number of Options", "ipxwan.num_options", FT_UINT8,
 354                  BASE_DEC, NULL, 0x0, NULL, HFILL }},
 355
 356             { &hf_ipxwan_option_num,
 357               { "Option Number", "ipxwan.option_num", FT_UINT8,
 358                  BASE_HEX, VALS(ipxwan_option_num_vals), 0x0, NULL, HFILL }},
 359
 360             { &hf_ipxwan_accept_option,
 361               { "Accept Option", "ipxwan.accept_option", FT_UINT8,
 362                  BASE_DEC, VALS(ipxwan_accept_option_vals), 0x0, NULL, HFILL }},
 363
 364             { &hf_ipxwan_option_data_len,
 365               { "Option Data Length", "ipxwan.option_data_len", FT_UINT16,
 366                  BASE_DEC, NULL, 0x0, NULL, HFILL }},
 367
 368             { &hf_ipxwan_routing_type,
 369               { "Routing Type", "ipxwan.routing_type", FT_UINT8,
 370                  BASE_DEC, VALS(ipxwan_routing_type_vals), 0x0, NULL, HFILL }},
 371
 372             { &hf_ipxwan_wan_link_delay,
 373               { "WAN Link Delay", "ipxwan.rip_sap_info_exchange.wan_link_delay",
 374                  FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
 375
 376             { &hf_ipxwan_common_network_number,
 377               { "Common Network Number", "ipxwan.rip_sap_info_exchange.common_network_number",
 378                  FT_IPXNET, BASE_NONE, NULL, 0x0, NULL, HFILL }},
 379
 380             { &hf_ipxwan_router_name,
 381               { "Router Name", "ipxwan.rip_sap_info_exchange.router_name",
 382                  FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
 383
 384             { &hf_ipxwan_delay,
 385               { "Delay", "ipxwan.nlsp_information.delay",
 386                  FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
 387
 388             { &hf_ipxwan_throughput,
 389               { "Throughput", "ipxwan.nlsp_information.throughput",
 390                  FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
 391
 392             { &hf_ipxwan_request_size,
 393               { "Request Size", "ipxwan.nlsp_raw_throughput_data.request_size",
 394                  FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
 395
 396             { &hf_ipxwan_delta_time,
 397               { "Delta Time", "ipxwan.nlsp_raw_throughput_data.delta_time",
 398                  FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
 399
 400             { &hf_ipxwan_extended_node_id,
 401               { "Extended Node ID", "ipxwan.extended_node_id",
 402                  FT_IPXNET, BASE_NONE, NULL, 0x0, NULL, HFILL }},
 403
 404             { &hf_ipxwan_node_number,
 405               { "Node Number", "ipxwan.node_number",
 406                  FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL }},
 407
 408             { &hf_ipxwan_compression_type,
 409               { "Compression Type", "ipxwan.compression.type",
 410                  FT_UINT8, BASE_DEC, VALS(ipxwan_compression_type_vals), 0x0,
 411                  NULL, HFILL }},
 412
 413             { &hf_ipxwan_compression_options,
 414               { "Compression options", "ipxwan.compression.options",
 415                  FT_UINT8, BASE_HEX, NULL, 0x0,
 416                  NULL, HFILL }},
 417
 418             { &hf_ipxwan_compression_slots,
 419               { "Number of compression slots", "ipxwan.compression.slots",
 420                  FT_UINT8, BASE_DEC, NULL, 0x0,
 421                  NULL, HFILL }},
 422
 423             { &hf_ipxwan_compression_parameters,
 424               { "Option parameters", "ipxwan.compression.parameters",
 425                  FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
 426
 427             { &hf_ipxwan_padding,
 428               { "Padding", "ipxwan.padding",
 429                  FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
 430
 431             { &hf_ipxwan_option_value,
 432               { "Option value", "ipxwan.option_value",
 433                  FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
 434         };
 435         static gint *ett[] = {
 436                 &ett_ipxwan,
 437                 &ett_ipxwan_option,
 438         };
 439         static ei_register_info ei[] = {
 440                 { &ei_ipxwan_option_data_len, { "ipxwan.option_data_len.invalid", PI_MALFORMED, PI_ERROR, "Wrong length", EXPFILL }},
 441         };
 442
 443         expert_module_t* expert_ipxwan;
 444
 445         proto_ipxwan = proto_register_protocol("IPX WAN", "IPX WAN", "ipxwan");
 446         proto_register_field_array(proto_ipxwan, hf, array_length(hf));
 447         proto_register_subtree_array(ett, array_length(ett));
 448         expert_ipxwan = expert_register_protocol(proto_ipxwan);
 449         expert_register_field_array(expert_ipxwan, ei, array_length(ei));
 450 }
 451
 452 void
 453 proto_reg_handoff_ipxwan(void)
 454 {
 455         dissector_handle_t ipxwan_handle;
 456
 457         ipxwan_handle = create_dissector_handle(dissect_ipxwan,
 458             proto_ipxwan);
 459         dissector_add_uint("ipx.socket", IPX_SOCKET_IPXWAN, ipxwan_handle);
 460 }
 461
 462 /*
 463  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 464  *
 465  * Local variables:
 466  * c-basic-offset: 8
 467  * tab-width: 8
 468  * indent-tabs-mode: t
 469  * End:
 470  *
 471  * vi: set shiftwidth=8 tabstop=8 noexpandtab:
 472  * :indentSize=8:tabSize=8:noTabs=false:
 473  */