plugins/docsis/packet-bpkmattr.c

   1 /* packet-bpkmattr.c
   2  * Routines for Baseline Privacy Key Management Attributes dissection
   3  * Copyright 2002, Anand V. Narwani <anand[AT]narwani.org>
   4  *
   5  * $Id$
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  24  */
  25
  26 #ifdef HAVE_CONFIG_H
  27 # include "config.h"
  28 #endif
  29
  30 #include "moduleinfo.h"
  31
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35
  36 #include <gmodule.h>
  37
  38 #include <epan/packet.h>
  39
  40 /* BPKM Attributes defined in:
  41  * http://www.cablemodem.com/downloads/specs/SP-BPI+_I10-030730.pdf
  42  */
  43 #define BPKM_RESERVED 0
  44 #define BPKM_SERIAL_NUM 1
  45 #define BPKM_MANUFACTURER_ID 2
  46 #define BPKM_MAC_ADDR 3
  47 #define BPKM_RSA_PUB_KEY 4
  48 #define BPKM_CM_ID 5
  49 #define BPKM_DISPLAY_STR 6
  50 #define BPKM_AUTH_KEY 7
  51 #define BPKM_TEK 8
  52 #define BPKM_KEY_LIFETIME 9
  53 #define BPKM_KEY_SEQ_NUM 10
  54 #define BPKM_HMAC_DIGEST 11
  55 #define BPKM_SAID 12
  56 #define BPKM_TEK_PARAM 13
  57 #define BPKM_OBSOLETED 14
  58 #define BPKM_CBC_IV 15
  59 #define BPKM_ERROR_CODE 16
  60 #define BPKM_CA_CERT 17
  61 #define BPKM_CM_CERT 18
  62 #define BPKM_SEC_CAPABILITIES 19
  63 #define BPKM_CRYPTO_SUITE 20
  64 #define BPKM_CRYPTO_SUITE_LIST 21
  65 #define BPKM_BPI_VERSION 22
  66 #define BPKM_SA_DESCRIPTOR 23
  67 #define BPKM_SA_TYPE 24
  68 #define BPKM_SA_QUERY 25
  69 #define BPKM_SA_QUERY_TYPE 26
  70 #define BPKM_IP_ADDRESS 27
  71 #define BPKM_DNLD_PARAMS 28
  72 #define BPKM_VENDOR_DEFINED 127
  73
  74 /* Initialize the protocol and registered fields */
  75 static int proto_docsis_bpkmattr = -1;
  76 static int hf_docsis_bpkmattr = -1;
  77 static int hf_docsis_bpkmattr_serial_num = -1;
  78 static int hf_docsis_bpkmattr_manf_id = -1;
  79 static int hf_docsis_bpkmattr_mac_addr = -1;
  80 static int hf_docsis_bpkmattr_rsa_pub_key = -1;
  81 static int hf_docsis_bpkmattr_cm_id = -1;
  82 static int hf_docsis_bpkmattr_display_str = -1;
  83 static int hf_docsis_bpkmattr_auth_key = -1;
  84 static int hf_docsis_bpkmattr_tek = -1;
  85 static int hf_docsis_bpkmattr_key_life = -1;
  86 static int hf_docsis_bpkmattr_key_seq = -1;
  87 static int hf_docsis_bpkmattr_hmac_digest = -1;
  88 static int hf_docsis_bpkmattr_said = -1;
  89 static int hf_docsis_bpkmattr_tek_params = -1;
  90 static int hf_docsis_bpkmattr_cbc_iv = -1;
  91 static int hf_docsis_bpkmattr_error_code = -1;
  92 static int hf_docsis_bpkmattr_vendor_def = -1;
  93 static int hf_docsis_bpkmattr_ca_cert = -1;
  94 static int hf_docsis_bpkmattr_cm_cert = -1;
  95 static int hf_docsis_bpkmattr_security_cap = -1;
  96 static int hf_docsis_bpkmattr_crypto_suite = -1;
  97 static int hf_docsis_bpkmattr_crypto_suite_list = -1;
  98 static int hf_docsis_bpkmattr_bpi_version = -1;
  99 static int hf_docsis_bpkmattr_sa_descr = -1;
 100 static int hf_docsis_bpkmattr_sa_type = -1;
 101 static int hf_docsis_bpkmattr_sa_query = -1;
 102 static int hf_docsis_bpkmattr_sa_query_type = -1;
 103 static int hf_docsis_bpkmattr_ip_address = -1;
 104 static int hf_docsis_bpkmattr_download_param = -1;
 105
 106
 107
 108 /* Initialize the subtree pointers */
 109 static gint ett_docsis_bpkmattr = -1;
 110 static gint ett_docsis_bpkmattr_cmid = -1;
 111 static gint ett_docsis_bpkmattr_scap = -1;
 112 static gint ett_docsis_bpkmattr_tekp = -1;
 113 static gint ett_docsis_bpkmattr_sadsc = -1;
 114 static gint ett_docsis_bpkmattr_saqry = -1;
 115 static gint ett_docsis_bpkmattr_dnld = -1;
 116
 117
 118 static const value_string error_code_vals[] = {
 119   {0, "no information"},
 120   {1, "Unauthorized CM"},
 121   {2, "Unauthorized SAID"},
 122   {3, "Unsolicited"},
 123   {4, "Invalid Key Sequence Number"},
 124   {5, "Key Request authentication failure"},
 125   {6, "Permanent Authorization Failure"},
 126   {7, "Not authorized for requested downstream traffic flow"},
 127   {8, "Downstream traffic flow not mapped to BPI+ SAID"},
 128   {9, "Time of day not acquired"},
 129   {0, NULL},
 130 };
 131
 132 static const value_string crypto_suite_attr_vals[] = {
 133   {0x0100, "CBC Mode, 56 Bit DES & no Data Authentication"},
 134   {0x0200, "CBC Mode, 40 Bit DES & no Data Authentication"},
 135   {0, NULL},
 136 };
 137
 138 static const value_string bpi_ver_vals[] = {
 139   {0, "Reserved"},
 140   {1, "BPI+"},
 141   {0, NULL},
 142 };
 143
 144 /* Code to actually dissect the packets */
 145
 146 /* The dissect_attrs() function does the actual work to dissect the
 147  * attributes.  It's called recursively, to dissect embedded attributes
 148  */
 149 static void
 150 dissect_attrs (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
 151 {
 152   guint8 type;
 153   guint16 length;
 154   int pos = 0;
 155   gint total_len;
 156   proto_item *cmid_it, *tekp_it, *scap_it;
 157   proto_item *saqry_it, *dnld_it, *sadsc_it;
 158   proto_tree *cmid_tree, *tekp_tree, *scap_tree;
 159   proto_tree *saqry_tree, *dnld_tree, *sadsc_tree;
 160   tvbuff_t *cmid_tvb, *tekp_tvb, *scap_tvb;
 161   tvbuff_t *saqry_tvb, *dnld_tvb, *sadsc_tvb;
 162
 163   total_len = tvb_reported_length_remaining (tvb, 0);
 164   while (pos < total_len)
 165     {
 166       type = tvb_get_guint8 (tvb, pos++);
 167       length = tvb_get_ntohs (tvb, pos);
 168       pos += 2;
 169       switch (type)
 170         {
 171         case BPKM_RESERVED:
 172           break;
 173         case BPKM_SERIAL_NUM:
 174           proto_tree_add_item (tree, hf_docsis_bpkmattr_serial_num, tvb, pos,
 175                                length, FALSE);
 176           break;
 177         case BPKM_MANUFACTURER_ID:
 178           if (length == 3)
 179             proto_tree_add_item (tree, hf_docsis_bpkmattr_manf_id, tvb, pos,
 180                                  length, FALSE);
 181           else
 182             THROW (ReportedBoundsError);
 183           break;
 184         case BPKM_MAC_ADDR:
 185           if (length == 6)
 186             proto_tree_add_item (tree, hf_docsis_bpkmattr_mac_addr, tvb, pos,
 187                                  length, FALSE);
 188           else
 189             THROW (ReportedBoundsError);
 190           break;
 191         case BPKM_RSA_PUB_KEY:
 192           proto_tree_add_item (tree, hf_docsis_bpkmattr_rsa_pub_key, tvb, pos,
 193                                length, FALSE);
 194           break;
 195         case BPKM_CM_ID:
 196           cmid_it =
 197             proto_tree_add_text (tree, tvb, pos, length,
 198                                  "5 CM Identification");
 199           cmid_tree =
 200             proto_item_add_subtree (cmid_it, ett_docsis_bpkmattr_cmid);
 201           cmid_tvb = tvb_new_subset (tvb, pos, length, length);
 202           dissect_attrs (cmid_tvb, pinfo, cmid_tree);
 203           break;
 204         case BPKM_DISPLAY_STR:
 205           proto_tree_add_item (tree, hf_docsis_bpkmattr_display_str, tvb, pos,
 206                                length, FALSE);
 207           break;
 208         case BPKM_AUTH_KEY:
 209           if ((length == 96) || (length == 128))
 210             proto_tree_add_item (tree, hf_docsis_bpkmattr_auth_key, tvb, pos,
 211                                  length, FALSE);
 212           else
 213             THROW (ReportedBoundsError);
 214           break;
 215         case BPKM_TEK:
 216           if (length == 8)
 217             proto_tree_add_item (tree, hf_docsis_bpkmattr_tek, tvb, pos,
 218                                  length, FALSE);
 219           else
 220             THROW (ReportedBoundsError);
 221           break;
 222         case BPKM_KEY_LIFETIME:
 223           if (length == 4)
 224             proto_tree_add_item (tree, hf_docsis_bpkmattr_key_life, tvb, pos,
 225                                  length, FALSE);
 226           else
 227             THROW (ReportedBoundsError);
 228           break;
 229         case BPKM_KEY_SEQ_NUM:
 230           if (length == 1)
 231             proto_tree_add_item (tree, hf_docsis_bpkmattr_key_seq, tvb, pos,
 232                                  length, FALSE);
 233           else
 234             THROW (ReportedBoundsError);
 235           break;
 236         case BPKM_HMAC_DIGEST:
 237           if (length == 20)
 238             proto_tree_add_item (tree, hf_docsis_bpkmattr_hmac_digest, tvb,
 239                                  pos, length, FALSE);
 240           else
 241             THROW (ReportedBoundsError);
 242           break;
 243         case BPKM_SAID:
 244           if (length == 2)
 245             proto_tree_add_item (tree, hf_docsis_bpkmattr_said, tvb, pos,
 246                                  length, FALSE);
 247           else
 248             THROW (ReportedBoundsError);
 249           break;
 250         case BPKM_TEK_PARAM:
 251           tekp_it =
 252             proto_tree_add_text (tree, tvb, pos, length, "13 TEK Parameters");
 253           tekp_tree =
 254             proto_item_add_subtree (tekp_it, ett_docsis_bpkmattr_tekp);
 255           tekp_tvb = tvb_new_subset (tvb, pos, length, length);
 256           dissect_attrs (tekp_tvb, pinfo, tekp_tree);
 257           break;
 258         case BPKM_OBSOLETED:
 259           break;
 260         case BPKM_CBC_IV:
 261           if (length == 8)
 262             proto_tree_add_item (tree, hf_docsis_bpkmattr_cbc_iv, tvb, pos,
 263                                  length, FALSE);
 264           else
 265             THROW (ReportedBoundsError);
 266           break;
 267         case BPKM_ERROR_CODE:
 268           if (length == 1)
 269             proto_tree_add_item (tree, hf_docsis_bpkmattr_error_code, tvb,
 270                                  pos, length, FALSE);
 271           else
 272             THROW (ReportedBoundsError);
 273           break;
 274         case BPKM_CA_CERT:
 275           proto_tree_add_item (tree, hf_docsis_bpkmattr_ca_cert, tvb, pos,
 276                                length, FALSE);
 277           break;
 278         case BPKM_CM_CERT:
 279           proto_tree_add_item (tree, hf_docsis_bpkmattr_cm_cert, tvb, pos,
 280                                length, FALSE);
 281           break;
 282         case BPKM_SEC_CAPABILITIES:
 283           scap_it =
 284             proto_tree_add_text (tree, tvb, pos, length,
 285                                  "19 Security Capabilities");
 286           scap_tree =
 287             proto_item_add_subtree (scap_it, ett_docsis_bpkmattr_scap);
 288           scap_tvb = tvb_new_subset (tvb, pos, length, length);
 289           dissect_attrs (scap_tvb, pinfo, scap_tree);
 290           break;
 291         case BPKM_CRYPTO_SUITE:
 292           if (length == 2)
 293             proto_tree_add_item (tree, hf_docsis_bpkmattr_crypto_suite, tvb,
 294                                  pos, length, FALSE);
 295           else
 296             THROW (ReportedBoundsError);
 297           break;
 298         case BPKM_CRYPTO_SUITE_LIST:
 299           proto_tree_add_item (tree, hf_docsis_bpkmattr_crypto_suite_list,
 300                                tvb, pos, length, FALSE);
 301           break;
 302         case BPKM_BPI_VERSION:
 303           if (length == 1)
 304             proto_tree_add_item (tree, hf_docsis_bpkmattr_bpi_version, tvb,
 305                                  pos, length, FALSE);
 306           else
 307             THROW (ReportedBoundsError);
 308           break;
 309         case BPKM_SA_DESCRIPTOR:
 310           sadsc_it =
 311             proto_tree_add_text (tree, tvb, pos, length, "23 SA Descriptor");
 312           sadsc_tree =
 313             proto_item_add_subtree (sadsc_it, ett_docsis_bpkmattr_sadsc);
 314           sadsc_tvb = tvb_new_subset (tvb, pos, length, length);
 315           dissect_attrs (sadsc_tvb, pinfo, sadsc_tree);
 316           break;
 317         case BPKM_SA_TYPE:
 318           if (length == 1)
 319             proto_tree_add_item (tree, hf_docsis_bpkmattr_sa_type, tvb, pos,
 320                                  length, FALSE);
 321           else
 322             THROW (ReportedBoundsError);
 323           break;
 324         case BPKM_SA_QUERY:
 325           saqry_it =
 326             proto_tree_add_text (tree, tvb, pos, length, "25 SA Query");
 327           saqry_tree =
 328             proto_item_add_subtree (saqry_it, ett_docsis_bpkmattr_saqry);
 329           saqry_tvb = tvb_new_subset (tvb, pos, length, length);
 330           dissect_attrs (saqry_tvb, pinfo, saqry_tree);
 331           break;
 332         case BPKM_SA_QUERY_TYPE:
 333           if (length == 1)
 334             proto_tree_add_item (tree, hf_docsis_bpkmattr_sa_query_type, tvb,
 335                                  pos, length, FALSE);
 336           else
 337             THROW (ReportedBoundsError);
 338           break;
 339         case BPKM_IP_ADDRESS:
 340           if (length == 4)
 341             proto_tree_add_item (tree, hf_docsis_bpkmattr_ip_address, tvb,
 342                                  pos, length, FALSE);
 343           else
 344             THROW (ReportedBoundsError);
 345           break;
 346         case BPKM_VENDOR_DEFINED:
 347           proto_tree_add_item (tree, hf_docsis_bpkmattr_vendor_def, tvb, pos,
 348                                length, FALSE);
 349         case BPKM_DNLD_PARAMS:
 350           dnld_it =
 351             proto_tree_add_text (tree, tvb, pos, length,
 352                                  "28 Download Parameters");
 353           dnld_tree =
 354             proto_item_add_subtree (dnld_it, ett_docsis_bpkmattr_dnld);
 355           dnld_tvb = tvb_new_subset (tvb, pos, length, length);
 356           dissect_attrs (dnld_tvb, pinfo, dnld_tree);
 357           break;
 358         default:
 359           proto_tree_add_item (tree, hf_docsis_bpkmattr_vendor_def, tvb, pos,
 360                                length, FALSE);
 361           break;
 362         }
 363       pos += length;            /* switch */
 364     }                           /* while */
 365 }
 366
 367 static void
 368 dissect_bpkmattr (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
 369 {
 370
 371   proto_item *it;
 372   proto_tree *bpkmattr_tree;
 373
 374   if (tree)
 375     {
 376       it =
 377         proto_tree_add_protocol_format (tree, proto_docsis_bpkmattr, tvb, 0, -1,
 378                                         "BPKM Attributes");
 379       bpkmattr_tree = proto_item_add_subtree (it, ett_docsis_bpkmattr);
 380       dissect_attrs (tvb, pinfo, bpkmattr_tree);
 381     }
 382
 383 }
 384
 385
 386
 387 /* Register the protocol with Wireshark */
 388
 389 /* this format is require because a script is used to build the C function
 390    that calls all the protocol registration.
 391 */
 392
 393
 394 void
 395 proto_register_docsis_bpkmattr (void)
 396 {
 397
 398 /* Setup list of header fields  See Section 1.6.1 for details*/
 399   static hf_register_info hf[] = {
 400     {&hf_docsis_bpkmattr,
 401      {"BPKM Attributes", "docsis.bpkmattr",
 402       FT_BYTES, BASE_HEX, NULL, 0x0,
 403       "BPKM Attributes", HFILL}
 404      },
 405     {&hf_docsis_bpkmattr_serial_num,
 406      {"1 Serial Number", "docsis.bpkmattr.serialnum",
 407       FT_STRING, BASE_DEC, NULL, 0x0,
 408       "Serial Number", HFILL}
 409      },
 410     {&hf_docsis_bpkmattr_manf_id,
 411      {"2 Manufacturer Id", "docsis.bpkmattr.manfid",
 412       FT_BYTES, BASE_HEX, NULL, 0x0,
 413       "Manufacturer Id", HFILL}
 414      },
 415     {&hf_docsis_bpkmattr_mac_addr,
 416      {"3 Mac Address", "docsis.bpkmattr.macaddr",
 417       FT_ETHER, BASE_HEX, NULL, 0x0,
 418       "Mac Address", HFILL}
 419      },
 420     {&hf_docsis_bpkmattr_rsa_pub_key,
 421      {"4 RSA Public Key", "docsis.bpkmattr.rsa_pub_key",
 422       FT_BYTES, BASE_HEX, NULL, 0x0,
 423       "RSA Public Key", HFILL}
 424      },
 425     {&hf_docsis_bpkmattr_cm_id,
 426      {"5 CM Identification", "docsis.bpkmattr.cmid",
 427       FT_BYTES, BASE_HEX, NULL, 0x0,
 428       "CM Identification", HFILL}
 429      },
 430     {&hf_docsis_bpkmattr_display_str,
 431      {"6 Display String", "docsis.bpkmattr.dispstr",
 432       FT_STRING, BASE_DEC, NULL, 0x0,
 433       "Display String", HFILL}
 434      },
 435     {&hf_docsis_bpkmattr_auth_key,
 436      {"7 Auth Key", "docsis.bpkmattr.auth_key",
 437       FT_BYTES, BASE_HEX, NULL, 0x0,
 438       "Auth Key", HFILL}
 439      },
 440     {&hf_docsis_bpkmattr_tek,
 441      {"8 Traffic Encryption Key", "docsis.bpkmattr.tek",
 442       FT_BYTES, BASE_HEX, NULL, 0x0,
 443       "Traffic Encryption Key", HFILL}
 444      },
 445     {&hf_docsis_bpkmattr_key_life,
 446      {"9 Key Lifetime (s)", "docsis.bpkmattr.keylife",
 447       FT_UINT32, BASE_DEC, NULL, 0x0,
 448       "Key Lifetime (s)", HFILL}
 449      },
 450     {&hf_docsis_bpkmattr_key_seq,
 451      {"10 Key Sequence Number", "docsis.bpkmattr.keyseq",
 452       FT_UINT8, BASE_DEC, NULL, 0x0,
 453       "Key Sequence Number", HFILL}
 454      },
 455     {&hf_docsis_bpkmattr_hmac_digest,
 456      {"11 HMAC Digest", "docsis.bpkmattr.hmacdigest",
 457       FT_BYTES, BASE_HEX, NULL, 0x0,
 458       "HMAC Digest", HFILL}
 459      },
 460     {&hf_docsis_bpkmattr_said,
 461      {"12 SAID", "docsis.bpkmattr.said",
 462       FT_UINT16, BASE_DEC, NULL, 0x0,
 463       "Security Association ID", HFILL}
 464      },
 465     {&hf_docsis_bpkmattr_tek_params,
 466      {"13 TEK Parameters", "docsis.bpkmattr.tekparams",
 467       FT_BYTES, BASE_HEX, NULL, 0x0,
 468       "TEK Parameters", HFILL}
 469      },
 470     {&hf_docsis_bpkmattr_cbc_iv,
 471      {"14 CBC IV", "docsis.bpkmattr.cbciv",
 472       FT_BYTES, BASE_HEX, NULL, 0x0,
 473       "Cypher Block Chaining", HFILL}
 474      },
 475     {&hf_docsis_bpkmattr_error_code,
 476      {"16 Error Code", "docsis.bpkmattr.errcode",
 477       FT_UINT8, BASE_DEC, VALS (error_code_vals), 0x0,
 478       "Error Code", HFILL}
 479      },
 480     {&hf_docsis_bpkmattr_vendor_def,
 481      {"127 Vendor Defined", "docsis.bpkmattr.vendordef",
 482       FT_BYTES, BASE_HEX, NULL, 0x0,
 483       "Vendor Defined", HFILL}
 484      },
 485     {&hf_docsis_bpkmattr_ca_cert,
 486      {"17 CA Certificate", "docsis.bpkmattr.cacert",
 487       FT_BYTES, BASE_HEX, NULL, 0x0,
 488       "CA Certificate", HFILL}
 489      },
 490     {&hf_docsis_bpkmattr_cm_cert,
 491      {"18 CM Certificate", "docsis.bpkmattr.cmcert",
 492       FT_BYTES, BASE_HEX, NULL, 0x0,
 493       "CM Certificate", HFILL}
 494      },
 495     {&hf_docsis_bpkmattr_security_cap,
 496      {"19 Security Capabilities", "docsis.bpkmattr.seccap",
 497       FT_BYTES, BASE_HEX, NULL, 0x0,
 498       "Security Capabilities", HFILL}
 499      },
 500     {&hf_docsis_bpkmattr_crypto_suite,
 501      {"20 Cryptographic Suite", "docsis.bpkmattr.cryptosuite",
 502       FT_UINT16, BASE_HEX, VALS(crypto_suite_attr_vals), 0x0,
 503       "Cryptographic Suite", HFILL}
 504      },
 505     {&hf_docsis_bpkmattr_crypto_suite_list,
 506      {"21 Cryptographic Suite List", "docsis.bpkmattr.crypto_suite_lst",
 507       FT_BYTES, BASE_HEX, NULL, 0x0,
 508       "Cryptographic Suite", HFILL}
 509      },
 510     {&hf_docsis_bpkmattr_bpi_version,
 511      {"22 BPI Version", "docsis.bpkmattr.bpiver",
 512       FT_UINT8, BASE_DEC, VALS (bpi_ver_vals), 0x0,
 513       "BPKM Attributes", HFILL}
 514      },
 515     {&hf_docsis_bpkmattr_sa_descr,
 516      {"23 SA Descriptor", "docsis.bpkmattr.sadescr",
 517       FT_BYTES, BASE_HEX, NULL, 0x0,
 518       "SA Descriptor", HFILL}
 519      },
 520     {&hf_docsis_bpkmattr_sa_type,
 521      {"24 SA Type", "docsis.bpkmattr.satype",
 522       FT_UINT8, BASE_DEC, NULL, 0x0,
 523       "SA Type", HFILL}
 524      },
 525     {&hf_docsis_bpkmattr_sa_query,
 526      {"25 SA Query", "docsis.bpkmattr.saquery",
 527       FT_BYTES, BASE_HEX, NULL, 0x0,
 528       "SA Query", HFILL}
 529      },
 530     {&hf_docsis_bpkmattr_sa_query_type,
 531      {"26 SA Query Type", "docsis.bpkmattr.saquery_type",
 532       FT_UINT8, BASE_HEX, NULL, 0x0,
 533       "SA Query Type", HFILL}
 534      },
 535     {&hf_docsis_bpkmattr_ip_address,
 536      {"27 IP Address", "docsis.bpkmattr.ipaddr",
 537       FT_IPv4, BASE_DEC, NULL, 0x0,
 538       "IP Address", HFILL}
 539      },
 540     {&hf_docsis_bpkmattr_download_param,
 541      {"28 Download Parameters", "docsis.bpkmattr.dnld_params",
 542       FT_BYTES, BASE_HEX, NULL, 0x0,
 543       "Download Parameters", HFILL}
 544      },
 545   };
 546
 547 /* Setup protocol subtree array */
 548   static gint *ett[] = {
 549     &ett_docsis_bpkmattr,
 550     &ett_docsis_bpkmattr_cmid,
 551     &ett_docsis_bpkmattr_scap,
 552     &ett_docsis_bpkmattr_tekp,
 553     &ett_docsis_bpkmattr_sadsc,
 554     &ett_docsis_bpkmattr_saqry,
 555     &ett_docsis_bpkmattr_dnld
 556   };
 557
 558 /* Register the protocol name and description */
 559   proto_docsis_bpkmattr =
 560     proto_register_protocol
 561     ("DOCSIS Baseline Privacy Key Management Attributes", "DOCSIS BPKM-ATTR",
 562      "docsis_bpkmattr");
 563
 564 /* Required function calls to register the header fields and subtrees used */
 565   proto_register_field_array (proto_docsis_bpkmattr, hf, array_length (hf));
 566   proto_register_subtree_array (ett, array_length (ett));
 567
 568   register_dissector ("docsis_bpkmattr", dissect_bpkmattr,
 569                       proto_docsis_bpkmattr);
 570 }
 571
 572
 573 /* If this dissector uses sub-dissector registration add a registration routine.
 574    This format is required because a script is used to find these routines and
 575    create the code that calls these routines.
 576 */
 577 void
 578 proto_reg_handoff_docsis_bpkmattr (void)
 579 {
 580   dissector_handle_t docsis_bpkmattr_handle;
 581
 582   docsis_bpkmattr_handle = find_dissector ("docsis_bpkmattr");
 583   dissector_add ("docsis", 0xFE, docsis_bpkmattr_handle);
 584
 585 }