epan/dissectors/packet-docsis-vendor.c

   1 /* packet-vendor.c
   2  * Routines for Vendor Specific Encodings dissection
   3  * Copyright 2002, Anand V. Narwani <anand[AT]narwani.org>
   4  *
   5  * Wireshark - Network traffic analyzer
   6  * By Gerald Combs <gerald@wireshark.org>
   7  * Copyright 1998 Gerald Combs
   8  *
   9  * SPDX-License-Identifier: GPL-2.0-or-later
  10  */
  11
  12
  13 /* Notes to Adding dissectors for Vendor specific TLVs:
  14  * 1. Create a dissect_<vendorname> function with the following prototype:
  15  *   dissect_foovendor(tvbuff_t *tvb, proto_tree *tree, int vsif_len)
  16  * 2. vsif_len will be the *entire* length of the vsif TLV (including the
  17  *   Vendor ID TLV, which is 5 bytes long).
  18  * 3. Create a new 'case' statement in dissect_vsif, for your specific Vendor
  19  *   ID.
  20  * 4. In that 'case' statement you will make the following calls:
  21  *   (assume for this example that your vendor ID is 0x000054)
  22  *   #define VENDOR_FOOVENDOR 0x00054
  23  *   case VENDOR_FOOVENDOR:
  24  *      proto_item_append_text (it, " (foo vendor)");
  25  *      dissect_foovendor (tvb, vsif_tree, vsif_len);
  26  *      break;
  27  * 5.  Please see dissect_cisco for an example of how to do this.
  28  */
  29
  30 #include "config.h"
  31
  32 #include <epan/packet.h>
  33 #include <epan/expert.h>
  34
  35 /* Define Vendor ID's here */
  36 #define VENDOR_CISCO 0x00000C
  37 #define VENDOR_GENERAL 0xFFFFFF
  38
  39 void proto_register_docsis_vsif(void);
  40 void proto_reg_handoff_docsis_vsif(void);
  41
  42 /* Initialize the protocol and registered fields */
  43 static int proto_docsis_vsif;
  44 static int hf_docsis_vsif_vendorid;
  45 static int hf_docsis_vsif_vendor_unknown;
  46 static int hf_docsis_vsif_cisco_numphones;
  47 /* static int hf_docsis_vsif_cisco_ipprec; */
  48 static int hf_docsis_vsif_cisco_ipprec_val;
  49 static int hf_docsis_vsif_cisco_ipprec_bw;
  50 static int hf_docsis_vsif_cisco_config_file;
  51
  52 static int hf_docsis_vsif_gex_loadbal_policy_id;
  53 static int hf_docsis_vsif_gex_loadbal_priority;
  54 static int hf_docsis_vsif_gex_loadbal_group_id;
  55 static int hf_docsis_vsif_gex_ranging_class_id_extension;
  56 static int hf_docsis_vsif_gex_l2vpn_encoding;
  57 static int hf_docsis_vsif_gex_ecm;
  58 static int hf_docsis_vsif_gex_sav;
  59 static int hf_docsis_vsif_gex_cmam;
  60 static int hf_docsis_vsif_gex_imja;
  61 static int hf_docsis_vsif_gex_service_type_identifier;
  62
  63 static int hf_docsis_vsif_gex_ecm_extended_cmts_mic_hmac_type;
  64 static int hf_docsis_vsif_gex_ecm_extended_cmts_mic_bitmap;
  65 static int hf_docsis_vsif_gex_ecm_explicit_extended_cmts_mic_digest_subtype;
  66
  67 static int hf_docsis_vsif_gex_sav_group_name;
  68 static int hf_docsis_vsif_gex_sav_static_prefix_rule;
  69
  70 static int hf_docsis_vsif_gex_sav_static_prefix_addressv4;
  71 static int hf_docsis_vsif_gex_sav_static_prefix_addressv6;
  72 static int hf_docsis_vsif_gex_sav_static_prefix_length;
  73
  74 static int hf_docsis_vsif_gex_cmam_cm_required_downstream_attribute_mask;
  75 static int hf_docsis_vsif_gex_cmam_cm_forbidden_downstream_attribute_mask;
  76 static int hf_docsis_vsif_gex_cmam_cm_required_upstream_attribute_mask;
  77 static int hf_docsis_vsif_gex_cmam_cm_forbidden_upstream_attribute_mask;
  78
  79 static int hf_docsis_vsif_gex_imja_ip_multicast_profile_name;
  80 static int hf_docsis_vsif_gex_imja_ssr;
  81 static int hf_docsis_vsif_gex_imja_maximum_multicast_sessions;
  82
  83 static int hf_docsis_vsif_gex_imja_ssr_rule_priority;
  84 static int hf_docsis_vsif_gex_imja_ssr_authorization_action;
  85 static int hf_docsis_vsif_gex_imja_ssr_source_prefix_addressv4;
  86 static int hf_docsis_vsif_gex_imja_ssr_source_prefix_addressv6;
  87 static int hf_docsis_vsif_gex_imja_ssr_source_prefix_length;
  88 static int hf_docsis_vsif_gex_imja_ssr_group_prefix_addressv4;
  89 static int hf_docsis_vsif_gex_imja_ssr_group_prefix_addressv6;
  90 static int hf_docsis_vsif_gex_imja_ssr_group_prefix_length;
  91
  92 static int hf_docsis_vsif_tlv_unknown;
  93
  94
  95 /* Initialize the subtree pointers */
  96 static int ett_docsis_vsif;
  97 static int ett_docsis_vsif_ipprec;
  98 static int ett_docsis_vsif_gex_ecm;
  99 static int ett_docsis_vsif_gex_sav;
 100 static int ett_docsis_vsif_gex_sav_spr;
 101 static int ett_docsis_vsif_gex_cmam;
 102 static int ett_docsis_vsif_gex_imja;
 103 static int ett_docsis_vsif_gex_imja_ssr;
 104
 105
 106 static expert_field ei_docsis_vsif_tlvlen_bad;
 107 static expert_field ei_docsis_vsif_tlvtype_unknown;
 108
 109 static const value_string vendorid_vals[] = {
 110   {VENDOR_CISCO, "Cisco Systems, Inc."},
 111   {VENDOR_GENERAL, "General Extension Information"},
 112   {0, NULL},
 113 };
 114
 115 static const value_string hmac_vals[] = {
 116        {1, "MD5 HMAC [RFC 2104]"},
 117        {2, "MMH16-sigma-n HMAC [DOCSIS SECv3.0]"},
 118        {43, "Vendor Specific"},
 119        {0, NULL},
 120 };
 121
 122 static const value_string authorization_action_vals[] = {
 123        {0, "permit"},
 124        {1, "deny"},
 125        {0, NULL},
 126 };
 127
 128
 129 /* Dissector for Cisco Vendor Specific TLVs */
 130
 131 #define NUM_PHONES      0x0a
 132 #define IOS_CONFIG_FILE 0x80
 133 #define IP_PREC         0x0b
 134 #define IP_PREC_VAL     0x01
 135 #define IP_PREC_BW      0x02
 136
 137 static void dissect_general_extension_information (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree,
 138                           int vsif_len);
 139
 140
 141 static void
 142 dissect_cisco (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, int vsif_len)
 143 {
 144   /* Start at pos = 5, since tvb includes the Vendor ID field */
 145   int pos = 5;
 146   uint8_t type, length;
 147   proto_tree *ipprec_tree;
 148   proto_item *ipprec_item;
 149   int templen;
 150
 151   while (pos < vsif_len)
 152     {
 153       /* Extract the type and length Fields from the TLV */
 154       type = tvb_get_uint8 (tvb, pos++);
 155       length = tvb_get_uint8 (tvb, pos++);
 156       switch (type)
 157         {
 158           case NUM_PHONES:
 159             proto_tree_add_item (tree, hf_docsis_vsif_cisco_numphones, tvb,
 160                                  pos, length, ENC_BIG_ENDIAN);
 161             break;
 162           case IP_PREC:
 163             ipprec_tree =
 164               proto_tree_add_subtree(tree, tvb, pos, length, ett_docsis_vsif_ipprec, &ipprec_item, "IP Precedence");
 165             /* Handle Sub-TLVs in IP Precedence */
 166             templen = pos + length;
 167             while (pos < templen)
 168               {
 169                 type = tvb_get_uint8 (tvb, pos++);
 170                 length = tvb_get_uint8 (tvb, pos++);
 171                 switch (type)
 172                   {
 173                     case IP_PREC_VAL:
 174                       if (length == 1)
 175                       {
 176                         proto_tree_add_item (ipprec_tree,
 177                                            hf_docsis_vsif_cisco_ipprec_val, tvb,
 178                                            pos, length, ENC_BIG_ENDIAN);
 179                       }
 180                       else
 181                       {
 182                         expert_add_info_format(pinfo, ipprec_item, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length);
 183                       }
 184                       break;
 185                     case IP_PREC_BW:
 186                       if (length != 4)
 187                       {
 188                         proto_tree_add_item (ipprec_tree,
 189                                            hf_docsis_vsif_cisco_ipprec_bw, tvb,
 190                                            pos, length, ENC_BIG_ENDIAN);
 191                       }
 192                       else
 193                       {
 194                         expert_add_info_format(pinfo, ipprec_item, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length);
 195                       }
 196                       break;
 197                     default:
 198                         expert_add_info_format(pinfo, ipprec_item, &ei_docsis_vsif_tlvtype_unknown, "Unknown TLV: %u", type);
 199                   }
 200                 pos += length;
 201               }
 202             break;
 203           case IOS_CONFIG_FILE:
 204             proto_tree_add_item (tree, hf_docsis_vsif_cisco_config_file, tvb,
 205                                  pos, length, ENC_ASCII);
 206         }
 207       pos += length;
 208     }
 209 }
 210
 211 /* Dissection */
 212 static int
 213 dissect_vsif (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, void* data _U_)
 214 {
 215   proto_item *it;
 216   proto_tree *vsif_tree;
 217   uint8_t type;
 218   uint8_t length;
 219   uint32_t value;
 220   int vsif_len;
 221
 222   /* get the reported length of the VSIF TLV */
 223   vsif_len = tvb_reported_length_remaining (tvb, 0);
 224
 225   it = proto_tree_add_protocol_format (tree, proto_docsis_vsif, tvb, 0, -1,
 226                                         "VSIF Encodings");
 227   vsif_tree = proto_item_add_subtree (it, ett_docsis_vsif);
 228   proto_tree_add_item_ret_uint(vsif_tree, hf_docsis_vsif_vendorid, tvb, 2, 3, ENC_BIG_ENDIAN, &value);
 229
 230   /* The first TLV in the VSIF encodings must be type 0x08 (Vendor ID) and
 231    * length 3.
 232    */
 233   type = tvb_get_uint8 (tvb, 0);
 234   if (type != 0x08)
 235      expert_add_info_format(pinfo, it, &ei_docsis_vsif_tlvtype_unknown, "Unknown TLV: %u", type);
 236
 237   length = tvb_get_uint8 (tvb, 1);
 238   if (length != 3)
 239      expert_add_info_format(pinfo, it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length);
 240
 241   /* switch on the Vendor ID */
 242   switch (value)
 243   {
 244     case VENDOR_CISCO:
 245       proto_item_append_text (it, " (Cisco)");
 246       dissect_cisco (tvb, pinfo, vsif_tree, vsif_len);
 247       break;
 248     case VENDOR_GENERAL:
 249       proto_item_append_text (it, " (General Extension Information)");
 250       dissect_general_extension_information (tvb, pinfo, vsif_tree, vsif_len);
 251       break;
 252     default:
 253       proto_item_append_text (it, " (Unknown)");
 254       proto_tree_add_item (vsif_tree, hf_docsis_vsif_vendor_unknown, tvb,
 255                             0, -1, ENC_NA);
 256     break;
 257   }
 258
 259   return tvb_captured_length(tvb);
 260 }
 261
 262
 263 #define GEX_ECM_EXTENDED_CMTS_MIC_HMAC_TYPE 1
 264 #define GEX_ECM_EXTENDED_CMTS_MIC_BITMAP 2
 265 #define GEX_ECM_EXPLICIT_EXTENDED_CMTS_MIC_DIGEST_SUBTYPE 3
 266
 267 static void
 268 dissect_extended_cmts_mic(tvbuff_t * tvb, proto_tree *tree, int start, uint16_t len)
 269 {
 270   proto_item *ecm_it;
 271   proto_tree *ecm_tree;
 272   uint8_t type, length;
 273   int pos = start;
 274
 275   ecm_it = proto_tree_add_item (tree, hf_docsis_vsif_gex_ecm, tvb, start, len, ENC_NA);
 276   ecm_tree = proto_item_add_subtree(ecm_it, ett_docsis_vsif_gex_ecm);
 277
 278   while (pos < (start + len))
 279     {
 280       type = tvb_get_uint8 (tvb, pos++);
 281       length = tvb_get_uint8 (tvb, pos++);
 282       switch (type)
 283         {
 284           case GEX_ECM_EXTENDED_CMTS_MIC_HMAC_TYPE:
 285             proto_tree_add_item (ecm_tree, hf_docsis_vsif_gex_ecm_extended_cmts_mic_hmac_type, tvb, pos, length, ENC_BIG_ENDIAN);
 286             break;
 287           case GEX_ECM_EXTENDED_CMTS_MIC_BITMAP:
 288             proto_tree_add_item (ecm_tree, hf_docsis_vsif_gex_ecm_extended_cmts_mic_bitmap, tvb, pos, length, ENC_NA);
 289             break;
 290           case GEX_ECM_EXPLICIT_EXTENDED_CMTS_MIC_DIGEST_SUBTYPE:
 291             proto_tree_add_item (ecm_tree, hf_docsis_vsif_gex_ecm_explicit_extended_cmts_mic_digest_subtype, tvb, pos, length, ENC_NA);
 292             break;
 293           default:
 294             proto_tree_add_item (ecm_tree, hf_docsis_vsif_tlv_unknown, tvb, pos, length, ENC_NA);
 295             break;
 296         }  /* switch */
 297       pos += length;
 298     }   /* while */
 299 }
 300
 301 #define GEX_SAV_STATIC_PREFIX_ADDRESS 1
 302 #define GEX_SAV_STATIC_PREFIX_LENGTH 2
 303
 304 static void
 305 dissect_sav_static_prefix_rule(tvbuff_t * tvb, packet_info * pinfo,  proto_tree *tree, int start, uint16_t len)
 306 {
 307   proto_item *sav_spr_it;
 308   proto_tree *sav_spr_tree;
 309   uint8_t type, length;
 310   int pos = start;
 311
 312   sav_spr_it = proto_tree_add_item (tree, hf_docsis_vsif_gex_sav_static_prefix_rule, tvb, start, len, ENC_NA);
 313   sav_spr_tree = proto_item_add_subtree(sav_spr_it, ett_docsis_vsif_gex_sav_spr);
 314
 315   while (pos < (start + len))
 316     {
 317       type = tvb_get_uint8 (tvb, pos++);
 318       length = tvb_get_uint8 (tvb, pos++);
 319       switch (type)
 320         {
 321           case GEX_SAV_STATIC_PREFIX_ADDRESS:
 322             if (length == 4) {
 323               proto_tree_add_item (sav_spr_tree, hf_docsis_vsif_gex_sav_static_prefix_addressv4, tvb, pos, length, ENC_BIG_ENDIAN);
 324             } else if (length == 6) {
 325               proto_tree_add_item (sav_spr_tree, hf_docsis_vsif_gex_sav_static_prefix_addressv6, tvb, pos, length, ENC_NA);
 326             } else {
 327               expert_add_info_format(pinfo, sav_spr_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length);
 328             }
 329             break;
 330           case GEX_SAV_STATIC_PREFIX_LENGTH:
 331             if (length == 1) {
 332               proto_tree_add_item (sav_spr_tree, hf_docsis_vsif_gex_sav_static_prefix_length, tvb, pos, length, ENC_BIG_ENDIAN);
 333             } else {
 334               expert_add_info_format(pinfo, sav_spr_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length);
 335             }
 336             break;
 337           default:
 338             proto_tree_add_item (sav_spr_tree, hf_docsis_vsif_tlv_unknown, tvb, pos, length, ENC_NA);
 339             break;
 340         }  /* switch */
 341         pos += length;
 342     }   /* while */
 343 }
 344
 345
 346
 347 #define GEX_SAV_GROUP_NAME 1
 348 #define GEX_SAV_STATIC_PREFIX_RULE 2
 349
 350
 351 static void
 352 dissect_sav(tvbuff_t * tvb, packet_info * pinfo,  proto_tree *tree, int start, uint16_t len)
 353 {
 354   proto_item *sav_it;
 355   proto_tree *sav_tree;
 356   uint8_t type, length;
 357   int pos = start;
 358
 359   sav_it = proto_tree_add_item (tree, hf_docsis_vsif_gex_sav, tvb, start, len, ENC_NA);
 360   sav_tree = proto_item_add_subtree(sav_it, ett_docsis_vsif_gex_sav);
 361
 362   while (pos < (start + len))
 363     {
 364       type = tvb_get_uint8 (tvb, pos++);
 365       length = tvb_get_uint8 (tvb, pos++);
 366       switch (type)
 367         {
 368         case GEX_SAV_GROUP_NAME:
 369           proto_tree_add_item (sav_tree, hf_docsis_vsif_gex_sav_group_name, tvb, pos, length, ENC_ASCII);
 370           break;
 371         case GEX_SAV_STATIC_PREFIX_RULE:
 372           dissect_sav_static_prefix_rule(tvb, pinfo, sav_tree, pos, length);
 373           break;
 374         default:
 375           proto_tree_add_item (sav_tree, hf_docsis_vsif_tlv_unknown, tvb, pos, length, ENC_NA);
 376           break;
 377         }  /* switch */
 378         pos += length;
 379     }   /* while */
 380 }
 381
 382
 383 #define GEX_CM_REQUIRED_DOWNSTREAM_ATTRIBUTE_MASK 1
 384 #define GEX_CM_FORBIDDEN_DOWNSTREAM_ATTRIBUTE_MASK 2
 385 #define GEX_CM_REQUIRED_UPSTREAM_ATTRIBUTE_MASK 3
 386 #define GEX_CM_FORBIDDEN_UPSTREAM_ATTRIBUTE_MASK 4
 387
 388 static void
 389 dissect_cable_modem_attribute_masks(tvbuff_t * tvb, packet_info * pinfo, proto_tree *tree, int start, uint16_t len)
 390 {
 391   proto_item *cmam_it;
 392   proto_tree *cmam_tree;
 393   uint8_t type, length;
 394   int pos = start;
 395
 396   cmam_it = proto_tree_add_item (tree, hf_docsis_vsif_gex_cmam, tvb, start, len, ENC_NA);
 397   cmam_tree = proto_item_add_subtree(cmam_it, ett_docsis_vsif_gex_cmam);
 398
 399   while (pos < (start + len))
 400     {
 401       type = tvb_get_uint8 (tvb, pos++);
 402       length = tvb_get_uint8 (tvb, pos++);
 403       switch (type)
 404         {
 405           case GEX_CM_REQUIRED_DOWNSTREAM_ATTRIBUTE_MASK:
 406             if (length != 4) {
 407               expert_add_info_format(pinfo, cmam_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length);
 408             }
 409             proto_tree_add_item (cmam_tree, hf_docsis_vsif_gex_cmam_cm_required_downstream_attribute_mask, tvb, pos, length, ENC_NA);
 410             break;
 411           case GEX_CM_FORBIDDEN_DOWNSTREAM_ATTRIBUTE_MASK:
 412             if (length != 4) {
 413               expert_add_info_format(pinfo, cmam_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length);
 414             }
 415             proto_tree_add_item (cmam_tree, hf_docsis_vsif_gex_cmam_cm_forbidden_downstream_attribute_mask, tvb, pos, length, ENC_NA);
 416             break;
 417           case GEX_CM_REQUIRED_UPSTREAM_ATTRIBUTE_MASK:
 418             if (length != 4) {
 419               expert_add_info_format(pinfo, cmam_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length);
 420             }
 421             proto_tree_add_item (cmam_tree, hf_docsis_vsif_gex_cmam_cm_required_upstream_attribute_mask, tvb, pos, length, ENC_NA);
 422             break;
 423           case GEX_CM_FORBIDDEN_UPSTREAM_ATTRIBUTE_MASK:
 424             if (length != 4) {
 425               expert_add_info_format(pinfo, cmam_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length);
 426             }
 427             proto_tree_add_item (cmam_tree, hf_docsis_vsif_gex_cmam_cm_forbidden_upstream_attribute_mask, tvb, pos, length, ENC_NA);
 428             break;
 429           default: proto_tree_add_item (cmam_tree, hf_docsis_vsif_tlv_unknown, tvb, pos, length, ENC_NA);
 430         }  /* switch */
 431         pos += length;
 432     }   /* while */
 433 }
 434
 435
 436 #define GEX_IMJA_SSR_RULE_PRIORITY 1
 437 #define GEX_IMJA_SSR_AUTHORIZATION_ACTION 2
 438 #define GEX_IMJA_SSR_AUTHORIZATION_SOURCE_PREFIX_ADDRESS 3
 439 #define GEX_IMJA_SSR_AUTHORIZATION_SOURCE_PREFIX_LENGTH 4
 440 #define GEX_IMJA_SSR_AUTHORIZATION_GROUP_PREFIX_ADDRESS 5
 441 #define GEX_IMJA_SSR_AUTHORIZATION_GROUP_PREFIX_LENGTH 6
 442
 443
 444 static void
 445 dissect_ip_multicast_join_authorization_static_session_rule(tvbuff_t * tvb, packet_info * pinfo, proto_tree *tree, int start, uint16_t len)
 446 {
 447   proto_item *imja_ssr_it;
 448   proto_tree *imja_ssr_tree;
 449   uint8_t type, length;
 450   int pos = start;
 451
 452   imja_ssr_it = proto_tree_add_item (tree, hf_docsis_vsif_gex_imja_ssr, tvb, start, len, ENC_NA);
 453   imja_ssr_tree = proto_item_add_subtree(imja_ssr_it, ett_docsis_vsif_gex_imja_ssr);
 454
 455   while (pos < (start + len))
 456     {
 457       type = tvb_get_uint8 (tvb, pos++);
 458       length = tvb_get_uint8 (tvb, pos++);
 459       switch (type)
 460         {
 461           case GEX_IMJA_SSR_RULE_PRIORITY:
 462             if (length != 1) {
 463               expert_add_info_format(pinfo, imja_ssr_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length);
 464             }
 465             proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_gex_imja_ssr_rule_priority, tvb, pos, length, ENC_BIG_ENDIAN);
 466             break;
 467           case GEX_IMJA_SSR_AUTHORIZATION_ACTION:
 468             if (length != 1) {
 469               expert_add_info_format(pinfo, imja_ssr_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length);
 470             }
 471             proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_gex_imja_ssr_authorization_action, tvb, pos, length, ENC_BIG_ENDIAN);
 472             break;
 473           case GEX_IMJA_SSR_AUTHORIZATION_SOURCE_PREFIX_ADDRESS:
 474             if (length == 4) {
 475               proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_gex_imja_ssr_source_prefix_addressv4, tvb, pos, length, ENC_BIG_ENDIAN);
 476             } else if (length == 6) {
 477               proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_gex_imja_ssr_source_prefix_addressv6, tvb, pos, length, ENC_NA);
 478             } else {
 479               expert_add_info_format(pinfo, imja_ssr_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length);
 480             }
 481             break;
 482           case GEX_IMJA_SSR_AUTHORIZATION_SOURCE_PREFIX_LENGTH:
 483             if (length != 1) {
 484               expert_add_info_format(pinfo, imja_ssr_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length);
 485             }
 486             proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_gex_imja_ssr_source_prefix_length, tvb, pos, length, ENC_BIG_ENDIAN);
 487             break;
 488           case GEX_IMJA_SSR_AUTHORIZATION_GROUP_PREFIX_ADDRESS:
 489             if (length == 4) {
 490               proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_gex_imja_ssr_group_prefix_addressv4, tvb, pos, length, ENC_BIG_ENDIAN);
 491             } else if (length == 6) {
 492               proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_gex_imja_ssr_group_prefix_addressv6, tvb, pos, length, ENC_NA);
 493             } else {
 494               expert_add_info_format(pinfo, imja_ssr_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length);
 495             }
 496             break;
 497           case GEX_IMJA_SSR_AUTHORIZATION_GROUP_PREFIX_LENGTH:
 498             if (length != 1) {
 499               expert_add_info_format(pinfo, imja_ssr_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length);
 500             }
 501             proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_gex_imja_ssr_group_prefix_length, tvb, pos, length, ENC_BIG_ENDIAN);
 502             break;
 503           default: proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_tlv_unknown, tvb, pos, length, ENC_NA);
 504         }  /* switch */
 505         pos += length;
 506     }   /* while */
 507 }
 508
 509 #define GEX_IMJA_IP_MULTICAST_PROFILE_NAME 1
 510 #define GEX_IMJA_IP_MULTICAST_PROFILE_JOIN_AUTHORIZATION_STATIC_SESSION_RULE 2
 511 #define GEX_IMJA_MAXIMUM_MULTICAST_SESSIONS 3
 512
 513
 514 static void
 515 dissect_ip_multicast_join_authorization(tvbuff_t * tvb, packet_info * pinfo,  proto_tree *tree, int start, uint16_t len)
 516 {
 517   proto_item *imja_it;
 518   proto_tree *imja_tree;
 519   uint8_t type, length;
 520   int pos = start;
 521
 522   imja_it = proto_tree_add_item (tree, hf_docsis_vsif_gex_imja, tvb, start, len, ENC_NA);
 523   imja_tree = proto_item_add_subtree(imja_it, ett_docsis_vsif_gex_imja);
 524
 525   while (pos < (start + len))
 526     {
 527       type = tvb_get_uint8 (tvb, pos++);
 528       length = tvb_get_uint8 (tvb, pos++);
 529       switch (type)
 530         {
 531           case GEX_IMJA_IP_MULTICAST_PROFILE_NAME:
 532             if ((length < 1) || (length > 15)) {
 533               expert_add_info_format(pinfo, imja_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length);
 534             }
 535             proto_tree_add_item (imja_tree, hf_docsis_vsif_gex_imja_ip_multicast_profile_name, tvb, pos, length, ENC_ASCII);
 536             break;
 537           case GEX_IMJA_IP_MULTICAST_PROFILE_JOIN_AUTHORIZATION_STATIC_SESSION_RULE:
 538             dissect_ip_multicast_join_authorization_static_session_rule(tvb, pinfo, imja_tree, pos, length);
 539             break;
 540           case GEX_IMJA_MAXIMUM_MULTICAST_SESSIONS:
 541             if (length != 2) {
 542               expert_add_info_format(pinfo, imja_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length);
 543             }
 544             proto_tree_add_item (imja_tree, hf_docsis_vsif_gex_imja_maximum_multicast_sessions, tvb, pos, length, ENC_BIG_ENDIAN);
 545             break;
 546           default: proto_tree_add_item (imja_tree, hf_docsis_vsif_tlv_unknown, tvb, pos, length, ENC_NA);
 547         }  /* switch */
 548         pos += length;
 549     }   /* while */
 550 }
 551
 552
 553
 554 /* Dissector for General Extension TLVs */
 555
 556 #define GEX_CM_LOAD_BALANCING_POLICY_ID 1
 557 #define GEX_CM_LOAD_BALANCING_PRIORITY 2
 558 #define GEX_CM_LOAD_BALANCING_GROUP_ID 3
 559 #define GEX_CM_RANGING_CLASS_ID_EXTENSION 4
 560 #define GEX_L2VPN_ENCODING 5
 561 #define GEX_EXTENDED_CMTS_MIC_CONFIGURATION_SETTING 6
 562 #define GEX_EXTENDED_SAV 7
 563 #define GEX_CABLE_MODEM_ATTRIBUTE_MASKS 9
 564 #define GEX_IP_MULTICAST_JOIN_AUTHORIZATION 10
 565 #define GEX_SERVICE_TYPE_IDENTIFIER 11
 566
 567
 568
 569 static void
 570 dissect_general_extension_information (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, int vsif_len)
 571 {
 572   /* Start at pos = 5, since tvb includes the Vendor ID field */
 573   int pos = 5;
 574   uint8_t type, length;
 575
 576   while (pos < vsif_len)
 577     {
 578       /* Extract the type and length Fields from the TLV */
 579       type = tvb_get_uint8 (tvb, pos++);
 580       length = tvb_get_uint8 (tvb, pos++);
 581       switch (type)
 582         {
 583           case GEX_CM_LOAD_BALANCING_POLICY_ID:
 584             proto_tree_add_item (tree, hf_docsis_vsif_gex_loadbal_policy_id, tvb, pos, length, ENC_BIG_ENDIAN);
 585             break;
 586           case GEX_CM_LOAD_BALANCING_PRIORITY:
 587             proto_tree_add_item (tree, hf_docsis_vsif_gex_loadbal_priority, tvb, pos, length, ENC_BIG_ENDIAN);
 588             break;
 589           case GEX_CM_LOAD_BALANCING_GROUP_ID:
 590             proto_tree_add_item (tree, hf_docsis_vsif_gex_loadbal_group_id, tvb, pos, length, ENC_BIG_ENDIAN);
 591             break;
 592           case GEX_CM_RANGING_CLASS_ID_EXTENSION:
 593             proto_tree_add_item (tree, hf_docsis_vsif_gex_ranging_class_id_extension, tvb, pos, length, ENC_BIG_ENDIAN);
 594             break;
 595           case GEX_L2VPN_ENCODING:
 596             proto_tree_add_item (tree, hf_docsis_vsif_gex_l2vpn_encoding, tvb, pos, length, ENC_NA);
 597             break;
 598           case GEX_EXTENDED_CMTS_MIC_CONFIGURATION_SETTING:
 599             dissect_extended_cmts_mic(tvb, tree, pos, length);
 600             break;
 601           case GEX_EXTENDED_SAV:
 602             dissect_sav(tvb, pinfo, tree, pos, length);
 603             break;
 604           case GEX_CABLE_MODEM_ATTRIBUTE_MASKS:
 605             dissect_cable_modem_attribute_masks(tvb, pinfo, tree, pos, length);
 606             break;
 607           case GEX_IP_MULTICAST_JOIN_AUTHORIZATION:
 608             dissect_ip_multicast_join_authorization(tvb, pinfo, tree, pos, length);
 609             break;
 610           case GEX_SERVICE_TYPE_IDENTIFIER:
 611             proto_tree_add_item (tree, hf_docsis_vsif_gex_service_type_identifier, tvb, pos, length, ENC_ASCII);
 612             break;
 613           default:
 614             proto_tree_add_item (tree, hf_docsis_vsif_tlv_unknown, tvb, pos, length, ENC_NA);
 615       }
 616       pos += length;
 617     }
 618 }
 619
 620
 621 /* Register the protocol with Wireshark */
 622 void
 623 proto_register_docsis_vsif (void)
 624 {
 625   static hf_register_info hf[] = {
 626     {&hf_docsis_vsif_vendorid,
 627      {"Vendor ID", "docsis_vsif.vendorid",
 628       FT_UINT24, BASE_HEX, VALS(vendorid_vals), 0x0,
 629       "Vendor Identifier", HFILL}
 630     },
 631     {&hf_docsis_vsif_vendor_unknown,
 632      {"VSIF Encodings", "docsis_vsif.unknown",
 633       FT_BYTES, BASE_NONE, NULL, 0x0,
 634       "Unknown Vendor", HFILL}
 635     },
 636     {&hf_docsis_vsif_cisco_numphones,
 637      {"Number of phone lines", "docsis_vsif.cisco.numphones",
 638       FT_UINT8, BASE_DEC, NULL, 0x0,
 639       NULL, HFILL}
 640     },
 641 #if 0
 642     {&hf_docsis_vsif_cisco_ipprec,
 643      {"IP Precedence Encodings", "docsis_vsif.cisco.ipprec",
 644       FT_BYTES, BASE_NONE, NULL, 0x0,
 645       NULL, HFILL}
 646     },
 647 #endif
 648     {&hf_docsis_vsif_cisco_ipprec_val,
 649      {"IP Precedence Value", "docsis_vsif.cisco.ipprec.value",
 650       FT_UINT8, BASE_DEC, NULL, 0x0,
 651       NULL, HFILL}
 652     },
 653     {&hf_docsis_vsif_cisco_ipprec_bw,
 654      {"IP Precedence Bandwidth", "docsis_vsif.cisco.ipprec.bw",
 655       FT_UINT8, BASE_DEC, NULL, 0x0,
 656       NULL, HFILL}
 657     },
 658     {&hf_docsis_vsif_cisco_config_file,
 659      {"IOS Config File", "docsis_vsif.cisco.iosfile",
 660       FT_STRING, BASE_NONE, NULL, 0x0,
 661       NULL, HFILL}
 662     },
 663     {&hf_docsis_vsif_gex_loadbal_policy_id,
 664      {".1 CM Load Balancing Policy ID", "docsis_vsif.gex.loadbal_policyid",
 665       FT_UINT32, BASE_DEC, NULL, 0x0,
 666       "General Extension Information - CM Load Balancing Policy ID", HFILL}
 667     },
 668     {&hf_docsis_vsif_gex_loadbal_priority,
 669      {".2 CM Load Balancing Priority", "docsis_vsif.gex.loadbal_priority",
 670       FT_UINT32, BASE_DEC, NULL, 0x0,
 671       "General Extension Information - CM Load Balancing Priority", HFILL}
 672     },
 673     {&hf_docsis_vsif_gex_loadbal_group_id,
 674      {".3 CM Load Balancing Group ID", "docsis_vsif.gex.loadbal_group_id",
 675       FT_UINT32, BASE_DEC, NULL, 0x0,
 676       "General Extension Information - CM Load Balancing Group ID", HFILL}
 677     },
 678     {&hf_docsis_vsif_gex_ranging_class_id_extension,
 679      {".4 CM Ranging Class ID Extension", "docsis_vsif.gex.ranging_class_id_extension",
 680       FT_UINT32, BASE_DEC, NULL, 0x0,
 681       "General Extension Information - CM Ranging Class ID Extension", HFILL}
 682     },
 683     {&hf_docsis_vsif_gex_l2vpn_encoding,
 684      {".5 L2VPN Encoding", "docsis_vsif.gex.l2vpn_encoding",
 685       FT_BYTES, BASE_NONE, NULL, 0x0,
 686       "General Extension Information - L2VPN Encoding", HFILL}
 687     },
 688     {&hf_docsis_vsif_gex_ecm,
 689      {".6 Extended CMTS MIC Configuration Setting", "docsis_vsif.gex.extended_cmts_mic_configuration_setting",
 690       FT_BYTES, BASE_NONE, NULL, 0x0,
 691       "General Extension Information - Extended CMTS MIC Configuration Setting", HFILL}
 692     },
 693     {&hf_docsis_vsif_gex_ecm_extended_cmts_mic_hmac_type,
 694      {"..1 Extended CMTS MIC Hmac type", "docsis_vsif.gex.extended_cmts_mic_hmac_type",
 695       FT_UINT8, BASE_DEC, VALS(hmac_vals), 0x0,
 696       "General Extension Information - Extended CMTS MIC Hmac type", HFILL}
 697     },
 698     {&hf_docsis_vsif_gex_ecm_extended_cmts_mic_bitmap,
 699      {"..2 Extended CMTS MIC Bitmap", "docsis_vsif.gex.extended_cmts_mic_bitmap",
 700       FT_BYTES, BASE_NONE, NULL, 0x0,
 701       "General Extension Information - Extended CMTS MIC Bitmap", HFILL}
 702     },
 703     {&hf_docsis_vsif_gex_ecm_explicit_extended_cmts_mic_digest_subtype,
 704      {"..3 Explicit Extended CMTS MIC Digest Subtype", "docsis_vsif.gex.extended_cmts_mic_digest_subtype",
 705       FT_BYTES, BASE_NONE, NULL, 0x0,
 706       "General Extension Information - Explicit Extended CMTS MIC Digest Subtype", HFILL}
 707     },
 708     {&hf_docsis_vsif_gex_sav,
 709      {".7 Source Address Verification (SAV) Authorization Encoding", "docsis_vsif.gex.sav",
 710       FT_BYTES, BASE_NONE, NULL, 0x0,
 711       "General Extension Information - Source Address Verification (SAV) Authorization Encoding", HFILL}
 712     },
 713     {&hf_docsis_vsif_gex_sav_group_name,
 714      {"..1 SAV Group Name", "docsis_vsif.gex.sav.sav_group_name",
 715       FT_STRING, BASE_NONE, NULL, 0x0,
 716       "General Extension Information - SAV - SAV Group Name", HFILL}
 717     },
 718     {&hf_docsis_vsif_gex_sav_static_prefix_rule,
 719      {"..2 SAV Static Prefix Rule", "docsis_vsif.gex.sav.static_prefix_rule",
 720       FT_BYTES, BASE_NONE, NULL, 0x0,
 721       "General Extension Information - SAV -Static Prefix Rule", HFILL}
 722     },
 723     {&hf_docsis_vsif_gex_sav_static_prefix_addressv4,
 724      {"...1 SAV Static Prefix Address", "docsis_vsif.gex.sav.spr.static_prefix_address4",
 725       FT_IPv4, BASE_NONE, NULL, 0x0,
 726       "General Extension Information - SAV -Static Prefix Rule - Static Prefix Address", HFILL}
 727     },
 728     {&hf_docsis_vsif_gex_sav_static_prefix_addressv6,
 729      {"...1 SAV Static Prefix Address", "docsis_vsif.gex.sav.spr.static_prefix_address6",
 730       FT_IPv6, BASE_NONE, NULL, 0x0,
 731       "General Extension Information - SAV -Static Prefix Rule - Static Prefix Address", HFILL}
 732     },
 733     {&hf_docsis_vsif_gex_sav_static_prefix_length,
 734      {"...2 SAV Static Prefix Length", "docsis_vsif.gex.sav.spr.static_prefix_length",
 735       FT_UINT8, BASE_DEC, NULL, 0x0,
 736       "General Extension Information - SAV -Static Prefix Rule - Static Prefix Length", HFILL}
 737     },
 738     {&hf_docsis_vsif_gex_cmam,
 739      {".9 CM Attribute Mask", "docsis_vsif.gex.cmam",
 740       FT_BYTES, BASE_NONE, NULL, 0x0,
 741       "General Extension Information - CM Attribute Mask", HFILL}
 742     },
 743     {&hf_docsis_vsif_gex_cmam_cm_required_downstream_attribute_mask,
 744      {"..1 CM Required Downstream Attribute", "docsis_vsif.gex.cmam.cm_required_downstream_attribute",
 745       FT_BYTES, BASE_NONE, NULL, 0x0,
 746       "General Extension Information - CM Attribute Mask - CM Required Downstream Attribute", HFILL}
 747     },
 748     {&hf_docsis_vsif_gex_cmam_cm_forbidden_downstream_attribute_mask,
 749      {"..2 CM Forbidden Downstream Attribute", "docsis_vsif.gex.cmam.cm_forbidden_downstream_attribute",
 750       FT_BYTES, BASE_NONE, NULL, 0x0,
 751       "General Extension Information - CM Attribute Mask - CM Forbidden Downstream Attribute", HFILL}
 752     },
 753     {&hf_docsis_vsif_gex_cmam_cm_required_upstream_attribute_mask,
 754      {"..3 CM Required Upstream Attribute", "docsis_vsif.gex.cmam.cm_required_upstream_attribute",
 755       FT_BYTES, BASE_NONE, NULL, 0x0,
 756       "General Extension Information - CM Attribute Mask - CM Required Upstream Attribute", HFILL}
 757     },
 758     {&hf_docsis_vsif_gex_cmam_cm_forbidden_upstream_attribute_mask,
 759      {"..4 CM Forbidden Upstream Attribute", "docsis_vsif.gex.cmam.cm_forbidden_upstream_attribute",
 760       FT_BYTES, BASE_NONE, NULL, 0x0,
 761       "General Extension Information - CM Attribute Mask - CM Forbidden Upstream Attribute", HFILL}
 762     },
 763     {&hf_docsis_vsif_gex_imja,
 764      {".10 IP Multicast Join Authorization", "docsis_vsif.gex.imja",
 765       FT_BYTES, BASE_NONE, NULL, 0x0,
 766       "General Extension Information - IP Multicast Join Authorization", HFILL}
 767     },
 768     {&hf_docsis_vsif_gex_imja_ip_multicast_profile_name,
 769      {"..1 IP Multicast Profile Name", "docsis_vsif.gex.imja.ip_multicast_profile_name",
 770       FT_STRING, BASE_NONE, NULL, 0x0,
 771       "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Name", HFILL}
 772     },
 773     {&hf_docsis_vsif_gex_imja_ssr,
 774      {"..2 IP Multicast Profile Join Authorization Static Session Rule", "docsis_vsif.gex.imja.ip_multicast_join_authorization_static_session_rule",
 775       FT_BYTES, BASE_NONE, NULL, 0x0,
 776       "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule", HFILL}
 777     },
 778     {&hf_docsis_vsif_gex_imja_ssr_rule_priority,
 779      {"...1 Rule Priority", "docsis_vsif.gex.imja.imja_ssr_rule_priority",
 780       FT_UINT8, BASE_DEC, NULL, 0x0,
 781       "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule - Rule Priority", HFILL}
 782     },
 783     {&hf_docsis_vsif_gex_imja_ssr_authorization_action,
 784      {"...2 Authorization Action", "docsis_vsif.gex.imja.imja_ssr_authorization_action",
 785       FT_UINT8, BASE_DEC, VALS(authorization_action_vals), 0x0,
 786       "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule - Rule Priority", HFILL}
 787     },
 788     {&hf_docsis_vsif_gex_imja_ssr_source_prefix_addressv4,
 789      {"...3 Source Prefix Address", "docsis_vsif.gex.imja.imja_ssr_source_prefix_address4",
 790       FT_IPv4, BASE_NONE, NULL, 0x0,
 791       "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule - Source Prefix Address", HFILL}
 792     },
 793     {&hf_docsis_vsif_gex_imja_ssr_source_prefix_addressv6,
 794      {"...3 Source Prefix Address", "docsis_vsif.gex.imja.imja_ssr_source_prefix_address6",
 795       FT_IPv6, BASE_NONE, NULL, 0x0,
 796       "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule - Source Prefix Address", HFILL}
 797     },
 798     {&hf_docsis_vsif_gex_imja_ssr_source_prefix_length,
 799      {"...4 Source Prefix Length", "docsis_vsif.gex.imja.imja_ssr_source_prefix_length",
 800       FT_UINT8, BASE_DEC, NULL, 0x0,
 801       "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule - Source Prefix Length", HFILL}
 802     },
 803     {&hf_docsis_vsif_gex_imja_ssr_group_prefix_addressv4,
 804      {"...5 Group Prefix Address", "docsis_vsif.gex.imja.imja_ssr_group_prefix_address4",
 805       FT_IPv4, BASE_NONE, NULL, 0x0,
 806       "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule - Group Prefix Address", HFILL}
 807     },
 808     {&hf_docsis_vsif_gex_imja_ssr_group_prefix_addressv6,
 809      {"...5 Group Prefix Address", "docsis_vsif.gex.imja.imja_ssr_group_prefix_address6",
 810       FT_IPv6, BASE_NONE, NULL, 0x0,
 811       "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule - Group Prefix Address", HFILL}
 812     },
 813     {&hf_docsis_vsif_gex_imja_ssr_group_prefix_length,
 814      {"...6 Group Prefix Length", "docsis_vsif.gex.imja.imja_ssr_group_prefix_length",
 815       FT_UINT8, BASE_DEC, NULL, 0x0,
 816       "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule - Group Prefix Length", HFILL}
 817     },
 818     {&hf_docsis_vsif_gex_imja_maximum_multicast_sessions,
 819      {"..3 Maximum Multicast Sessions", "docsis_vsif.gex.imja.imja_maximum_multicast_sessions",
 820       FT_UINT16, BASE_DEC, NULL, 0x0,
 821       "General Extension Information - IP Multicast Join Authorization - Maximum Multicast Sessions", HFILL}
 822     },
 823     {&hf_docsis_vsif_gex_service_type_identifier,
 824      {".11 Service Type Identifier", "docsis_vsif.gex.service_type_identifier",
 825       FT_STRING, BASE_NONE, NULL, 0x0,
 826       "General Extension Information - Service Type Identifier", HFILL}
 827     },
 828     {&hf_docsis_vsif_tlv_unknown,
 829      {"Unknown VSIF TLV", "docsis_vsif.unknown",
 830       FT_BYTES, BASE_NONE, NULL, 0x0,
 831       NULL, HFILL}
 832     },
 833   };
 834
 835   static int *ett[] = {
 836     &ett_docsis_vsif,
 837     &ett_docsis_vsif_ipprec,
 838     &ett_docsis_vsif_gex_ecm,
 839     &ett_docsis_vsif_gex_sav,
 840     &ett_docsis_vsif_gex_sav_spr,
 841     &ett_docsis_vsif_gex_cmam,
 842     &ett_docsis_vsif_gex_imja,
 843     &ett_docsis_vsif_gex_imja_ssr
 844   };
 845
 846   expert_module_t* expert_docsis_vsif;
 847
 848   static ei_register_info ei[] = {
 849     {&ei_docsis_vsif_tlvlen_bad, { "docsis_vsif.tlvlenbad", PI_MALFORMED, PI_ERROR, "Bad TLV length", EXPFILL}},
 850     {&ei_docsis_vsif_tlvtype_unknown, { "docsis_vsif.tlvtypeunknown", PI_PROTOCOL, PI_WARN, "Unknown TLV type", EXPFILL}},
 851   };
 852
 853   proto_docsis_vsif =
 854     proto_register_protocol ("DOCSIS Vendor Specific Encodings",
 855                              "DOCSIS VSIF", "docsis_vsif");
 856
 857   proto_register_field_array (proto_docsis_vsif, hf, array_length (hf));
 858   proto_register_subtree_array (ett, array_length (ett));
 859   expert_docsis_vsif = expert_register_protocol(proto_docsis_vsif);
 860   expert_register_field_array(expert_docsis_vsif, ei, array_length(ei));
 861
 862   register_dissector ("docsis_vsif", dissect_vsif, proto_docsis_vsif);
 863 }
 864
 865 void
 866 proto_reg_handoff_docsis_vsif (void)
 867 {
 868 #if 0
 869   dissector_handle_t docsis_vsif_handle;
 870
 871   docsis_vsif_handle = find_dissector ("docsis_vsif");
 872   dissector_add_uint ("docsis", 0xFD, docsis_vsif_handle);
 873 #endif
 874 }
 875
 876 /*
 877  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 878  *
 879  * Local Variables:
 880  * c-basic-offset: 2
 881  * tab-width: 8
 882  * indent-tabs-mode: nil
 883  * End:
 884  *
 885  * ex: set shiftwidth=2 tabstop=8 expandtab:
 886  * :indentSize=2:tabSize=8:noTabs=true:
 887  */