epan/dissectors/packet-asap.c

   1 /* packet-asap.c
   2  * Routines for Aggregate Server Access Protocol (ASAP)
   3  * It is hopefully (needs testing) compliant to
   4  * RFC 5352
   5  * RFC 5354
   6  * RFC 5356
   7  * http://www.ietf.org/internet-drafts/draft-dreibholz-asap-hropt-03.txt
   8  * http://www.ietf.org/internet-drafts/draft-dreibholz-rserpool-delay-02.txt
   9  *
  10  * The code is not as simple as possible for the current protocol
  11  * but allows to be easily adopted to future versions of the protocol.
  12  * I will reconsider this after the protocol is an RFC.
  13  *
  14  * TODO:
  15  *   - check message lengths
  16  *
  17  * Copyright 2004, 2005, 2006, 2007 Michael Tuexen <tuexen [AT] fh-muenster.de>
  18  * Copyright 2008 Thomas Dreibholz <dreibh [AT] iem.uni-due.de>
  19  *
  20  * $Id$
  21  *
  22  * Wireshark - Network traffic analyzer
  23  * By Gerald Combs <gerald@wireshark.org>
  24  * Copyright 1998 Gerald Combs
  25  *
  26  * Copied from README.developer
  27  *
  28  * This program is free software; you can redistribute it and/or
  29  * modify it under the terms of the GNU General Public License
  30  * as published by the Free Software Foundation; either version 2
  31  * of the License, or (at your option) any later version.
  32  *
  33  * This program is distributed in the hope that it will be useful,
  34  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  35  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  36  * GNU General Public License for more details.
  37  *
  38  * You should have received a copy of the GNU General Public License
  39  * along with this program; if not, write to the Free Software
  40  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  41  */
  42
  43 #include "config.h"
  44
  45 #include <epan/packet.h>
  46 #include <epan/to_str.h>
  47 #include <epan/sctpppids.h>
  48
  49 void proto_register_asap(void);
  50 void proto_reg_handoff_asap(void);
  51
  52 /* Initialize the protocol and registered fields */
  53 static int proto_asap = -1;
  54 static int hf_cause_code = -1;
  55 static int hf_cause_length = -1;
  56 static int hf_cause_info = -1;
  57 static int hf_cause_padding = -1;
  58 static int hf_message_type = -1;
  59 static int hf_message_flags = -1;
  60 static int hf_message_length = -1;
  61 static int hf_parameter_type = -1;
  62 static int hf_parameter_length = -1;
  63 static int hf_parameter_value = -1;
  64 static int hf_parameter_padding = -1;
  65 static int hf_parameter_ipv4_address = -1;
  66 static int hf_parameter_ipv6_address = -1;
  67 static int hf_dccp_port = -1;
  68 static int hf_dccp_reserved = -1;
  69 static int hf_dccp_service_code = -1;
  70 static int hf_sctp_port = -1;
  71 static int hf_transport_use = -1;
  72 static int hf_tcp_port = -1;
  73 static int hf_udp_port = -1;
  74 static int hf_udp_reserved = -1;
  75 static int hf_udp_lite_port = -1;
  76 static int hf_udp_lite_reserved = -1;
  77 static int hf_policy_type = -1;
  78 static int hf_policy_value = -1;
  79 static int hf_policy_weight = -1;
  80 static int hf_policy_priority = -1;
  81 static int hf_policy_load = -1;
  82 static int hf_policy_degradation = -1;
  83 static int hf_policy_loaddpf = -1;
  84 static int hf_policy_weightdpf = -1;
  85 static int hf_policy_distance = -1;
  86 static int hf_pool_handle = -1;
  87 static int hf_pe_pe_identifier = -1;
  88 static int hf_home_enrp_id = -1;
  89 static int hf_reg_life = -1;
  90 static int hf_server_identifier = -1;
  91 static int hf_cookie = -1;
  92 static int hf_pe_identifier = -1;
  93 static int hf_pe_checksum = -1;
  94 static int hf_hropt_items = -1;
  95 static int hf_home_enrp_server_bit = -1;
  96 static int hf_reject_bit = -1;
  97
  98 /* Initialize the subtree pointers */
  99 static gint ett_asap = -1;
 100 static gint ett_asap_parameter = -1;
 101 static gint ett_asap_cause = -1;
 102 static gint ett_asap_flags = -1;
 103
 104 static void
 105 dissect_parameters(tvbuff_t *, proto_tree *);
 106 static void
 107 dissect_parameter(tvbuff_t *, proto_tree *);
 108 static void
 109 dissect_asap(tvbuff_t *, packet_info *, proto_tree *);
 110
 111 #define ADD_PADDING(x) ((((x) + 3) >> 2) << 2)
 112
 113 #define ASAP_UDP_PORT  3863
 114 #define ASAP_TCP_PORT  3863
 115 #define ASAP_SCTP_PORT 3863
 116
 117 /* Dissectors for error causes. This is common for ASAP and ENRP. */
 118
 119 #define CAUSE_CODE_LENGTH   2
 120 #define CAUSE_LENGTH_LENGTH 2
 121 #define CAUSE_HEADER_LENGTH (CAUSE_CODE_LENGTH + CAUSE_LENGTH_LENGTH)
 122
 123 #define CAUSE_HEADER_OFFSET 0
 124 #define CAUSE_CODE_OFFSET   CAUSE_HEADER_OFFSET
 125 #define CAUSE_LENGTH_OFFSET (CAUSE_CODE_OFFSET + CAUSE_CODE_LENGTH)
 126 #define CAUSE_INFO_OFFSET   (CAUSE_LENGTH_OFFSET + CAUSE_LENGTH_LENGTH)
 127
 128 static void
 129 dissect_unknown_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
 130 {
 131   guint16 code, length, cause_info_length;
 132
 133   code              = tvb_get_ntohs(cause_tvb, CAUSE_CODE_OFFSET);
 134   length            = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
 135   cause_info_length = length - CAUSE_HEADER_LENGTH;
 136   if (cause_info_length > 0)
 137     proto_tree_add_item(cause_tree, hf_cause_info, cause_tvb, CAUSE_INFO_OFFSET, cause_info_length, ENC_NA);
 138   proto_item_append_text(cause_item, " (code %u and %u byte%s information)", code, cause_info_length, plurality(cause_info_length, "", "s"));
 139 }
 140
 141 #define UNRECOGNIZED_PARAMETER_CAUSE_CODE                  0x1
 142 #define UNRECONGNIZED_MESSAGE_CAUSE_CODE                   0x2
 143 #define INVALID_VALUES                                     0x3
 144 #define NON_UNIQUE_PE_IDENTIFIER                           0x4
 145 #define POOLING_POLICY_INCONSISTENT_CAUSE_CODE             0x5
 146 #define LACK_OF_RESOURCES_CAUSE_CODE                       0x6
 147 #define INCONSISTENT_TRANSPORT_TYPE_CAUSE_CODE             0x7
 148 #define INCONSISTENT_DATA_CONTROL_CONFIGURATION_CAUSE_CODE 0x8
 149 #define UNKNOWN_POOL_HANDLE                                0x9
 150 #define REJECTION_DUE_TO_SECURITY_CAUSE_CODE               0xa
 151
 152 static const value_string cause_code_values[] = {
 153   { UNRECOGNIZED_PARAMETER_CAUSE_CODE,                  "Unrecognized parameter"                  },
 154   { UNRECONGNIZED_MESSAGE_CAUSE_CODE,                   "Unrecognized message"                    },
 155   { INVALID_VALUES,                                     "Invalid values"                          },
 156   { NON_UNIQUE_PE_IDENTIFIER,                           "Non-unique PE identifier"                },
 157   { POOLING_POLICY_INCONSISTENT_CAUSE_CODE,             "Pooling policy inconsistent"             },
 158   { LACK_OF_RESOURCES_CAUSE_CODE,                       "Lack of resources"                       },
 159   { INCONSISTENT_TRANSPORT_TYPE_CAUSE_CODE,             "Inconsistent transport type"             },
 160   { INCONSISTENT_DATA_CONTROL_CONFIGURATION_CAUSE_CODE, "Inconsistent data/control type"          },
 161   { UNKNOWN_POOL_HANDLE,                                "Unknown pool handle"                     },
 162   { REJECTION_DUE_TO_SECURITY_CAUSE_CODE,               "Rejected due to security considerations" },
 163   { 0,                                                  NULL                                      } };
 164
 165 static void
 166 dissect_error_cause(tvbuff_t *cause_tvb, proto_tree *parameter_tree)
 167 {
 168   guint16 code, length, padding_length;
 169   proto_item *cause_item;
 170   proto_tree *cause_tree;
 171   tvbuff_t *parameter_tvb, *message_tvb;
 172
 173   code           = tvb_get_ntohs(cause_tvb, CAUSE_CODE_OFFSET);
 174   length         = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
 175   padding_length = tvb_length(cause_tvb) - length;
 176
 177   cause_item = proto_tree_add_text(parameter_tree, cause_tvb, CAUSE_HEADER_OFFSET, tvb_length(cause_tvb),
 178                                    "%s", val_to_str_const(code, cause_code_values, "Unknown error cause"));
 179   cause_tree = proto_item_add_subtree(cause_item, ett_asap_cause);
 180
 181   proto_tree_add_item(cause_tree, hf_cause_code,   cause_tvb, CAUSE_CODE_OFFSET,   CAUSE_CODE_LENGTH,   ENC_BIG_ENDIAN);
 182   proto_tree_add_item(cause_tree, hf_cause_length, cause_tvb, CAUSE_LENGTH_OFFSET, CAUSE_LENGTH_LENGTH, ENC_BIG_ENDIAN);
 183
 184   switch(code) {
 185   case UNRECOGNIZED_PARAMETER_CAUSE_CODE:
 186     parameter_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET);
 187     dissect_parameter(parameter_tvb, cause_tree);
 188     break;
 189   case UNRECONGNIZED_MESSAGE_CAUSE_CODE:
 190     message_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET);
 191     dissect_asap(message_tvb, NULL, cause_tree);
 192     break;
 193   case INVALID_VALUES:
 194     parameter_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET);
 195     dissect_parameter(parameter_tvb, cause_tree);
 196     break;
 197   case NON_UNIQUE_PE_IDENTIFIER:
 198     break;
 199   case POOLING_POLICY_INCONSISTENT_CAUSE_CODE:
 200     parameter_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET);
 201     dissect_parameter(parameter_tvb, cause_tree);
 202     break;
 203   case LACK_OF_RESOURCES_CAUSE_CODE:
 204     break;
 205   case INCONSISTENT_TRANSPORT_TYPE_CAUSE_CODE:
 206     parameter_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET);
 207     dissect_parameter(parameter_tvb, cause_tree);
 208     break;
 209   case INCONSISTENT_DATA_CONTROL_CONFIGURATION_CAUSE_CODE:
 210     break;
 211   case UNKNOWN_POOL_HANDLE:
 212     break;
 213   case REJECTION_DUE_TO_SECURITY_CAUSE_CODE:
 214     break;
 215   default:
 216     dissect_unknown_cause(cause_tvb, cause_tree, cause_item);
 217     break;
 218   }
 219   if (padding_length > 0)
 220     proto_tree_add_item(cause_tree, hf_cause_padding, cause_tvb, CAUSE_HEADER_OFFSET + length, padding_length, ENC_NA);
 221 }
 222
 223 static void
 224 dissect_error_causes(tvbuff_t *error_causes_tvb, proto_tree *parameter_tree)
 225 {
 226   guint16 length, total_length;
 227   gint offset;
 228   tvbuff_t *error_cause_tvb;
 229
 230   offset = 0;
 231   while(tvb_reported_length_remaining(error_causes_tvb, offset) > 0) {
 232     length          = tvb_get_ntohs(error_causes_tvb, offset + CAUSE_LENGTH_OFFSET);
 233     total_length    = ADD_PADDING(length);
 234     error_cause_tvb = tvb_new_subset(error_causes_tvb, offset , total_length, total_length);
 235     dissect_error_cause(error_cause_tvb, parameter_tree);
 236     offset += total_length;
 237   }
 238 }
 239
 240 /* Dissectors for parameters. This is common for ASAP and ENRP. */
 241
 242 #define PARAMETER_TYPE_LENGTH   2
 243 #define PARAMETER_LENGTH_LENGTH 2
 244 #define PARAMETER_HEADER_LENGTH (PARAMETER_TYPE_LENGTH + PARAMETER_LENGTH_LENGTH)
 245
 246 #define PARAMETER_HEADER_OFFSET 0
 247 #define PARAMETER_TYPE_OFFSET   PARAMETER_HEADER_OFFSET
 248 #define PARAMETER_LENGTH_OFFSET (PARAMETER_TYPE_OFFSET + PARAMETER_TYPE_LENGTH)
 249 #define PARAMETER_VALUE_OFFSET  (PARAMETER_LENGTH_OFFSET + PARAMETER_LENGTH_LENGTH)
 250
 251 #define IPV4_ADDRESS_LENGTH 4
 252 #define IPV4_ADDRESS_OFFSET PARAMETER_VALUE_OFFSET
 253
 254 static void
 255 dissect_ipv4_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 256 {
 257   proto_tree_add_item(parameter_tree, hf_parameter_ipv4_address, parameter_tvb, IPV4_ADDRESS_OFFSET, IPV4_ADDRESS_LENGTH, ENC_BIG_ENDIAN);
 258   proto_item_append_text(parameter_item, " (%s)", tvb_ip_to_str(parameter_tvb, IPV4_ADDRESS_OFFSET));
 259 }
 260
 261 #define IPV6_ADDRESS_LENGTH 16
 262 #define IPV6_ADDRESS_OFFSET PARAMETER_VALUE_OFFSET
 263
 264 static void
 265 dissect_ipv6_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 266 {
 267   proto_tree_add_item(parameter_tree, hf_parameter_ipv6_address, parameter_tvb, IPV6_ADDRESS_OFFSET, IPV6_ADDRESS_LENGTH, ENC_NA);
 268   proto_item_append_text(parameter_item, " (%s)", tvb_ip6_to_str(parameter_tvb, IPV6_ADDRESS_OFFSET));
 269 }
 270
 271 #define DCCP_PORT_LENGTH         2
 272 #define DCCP_RESERVED_LENGTH     2
 273 #define DCCP_SERVICE_CODE_LENGTH 4
 274 #define DCCP_PORT_OFFSET         PARAMETER_VALUE_OFFSET
 275 #define DCCP_RESERVED_OFFSET     (DCCP_PORT_OFFSET + DCCP_PORT_LENGTH)
 276 #define DCCP_SERVICE_CODE_OFFSET (DCCP_RESERVED_OFFSET + DCCP_RESERVED_LENGTH)
 277 #define DCCP_ADDRESS_OFFSET      (DCCP_SERVICE_CODE_OFFSET + DCCP_SERVICE_CODE_LENGTH)
 278
 279 static void
 280 dissect_dccp_transport_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 281 {
 282   tvbuff_t *parameters_tvb;
 283
 284   proto_tree_add_item(parameter_tree, hf_dccp_port,         parameter_tvb, DCCP_PORT_OFFSET,         DCCP_PORT_LENGTH,         ENC_BIG_ENDIAN);
 285   proto_tree_add_item(parameter_tree, hf_dccp_reserved,     parameter_tvb, DCCP_RESERVED_OFFSET,     DCCP_RESERVED_LENGTH,     ENC_BIG_ENDIAN);
 286   proto_tree_add_item(parameter_tree, hf_dccp_service_code, parameter_tvb, DCCP_SERVICE_CODE_OFFSET, DCCP_SERVICE_CODE_LENGTH, ENC_BIG_ENDIAN);
 287
 288   parameters_tvb = tvb_new_subset_remaining(parameter_tvb, DCCP_ADDRESS_OFFSET);
 289   dissect_parameters(parameters_tvb, parameter_tree);
 290 }
 291
 292 #define TRANSPORT_USE_DATA_ONLY         0
 293 #define TRANSPORT_USE_DATA_PLUS_CONTROL 1
 294
 295 static const value_string transport_use_values[] = {
 296   { TRANSPORT_USE_DATA_ONLY,          "Data only"         },
 297   { TRANSPORT_USE_DATA_PLUS_CONTROL,  "Data plus control" },
 298   { 0,                                NULL                } };
 299
 300 #define SCTP_PORT_LENGTH          2
 301 #define SCTP_TRANSPORT_USE_LENGTH 2
 302 #define SCTP_PORT_OFFSET          PARAMETER_VALUE_OFFSET
 303 #define SCTP_TRANSPORT_USE_OFFSET (SCTP_PORT_OFFSET + SCTP_PORT_LENGTH)
 304 #define SCTP_ADDRESS_OFFSET       (SCTP_TRANSPORT_USE_OFFSET + SCTP_TRANSPORT_USE_LENGTH)
 305
 306 static void
 307 dissect_sctp_transport_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 308 {
 309   tvbuff_t *parameters_tvb;
 310
 311   proto_tree_add_item(parameter_tree, hf_sctp_port,     parameter_tvb, SCTP_PORT_OFFSET,          SCTP_PORT_LENGTH,          ENC_BIG_ENDIAN);
 312   proto_tree_add_item(parameter_tree, hf_transport_use, parameter_tvb, SCTP_TRANSPORT_USE_OFFSET, SCTP_TRANSPORT_USE_LENGTH, ENC_BIG_ENDIAN);
 313
 314   parameters_tvb = tvb_new_subset_remaining(parameter_tvb, SCTP_ADDRESS_OFFSET);
 315   dissect_parameters(parameters_tvb, parameter_tree);
 316 }
 317
 318 #define TCP_PORT_LENGTH          2
 319 #define TCP_TRANSPORT_USE_LENGTH 2
 320 #define TCP_PORT_OFFSET          PARAMETER_VALUE_OFFSET
 321 #define TCP_TRANSPORT_USE_OFFSET (TCP_PORT_OFFSET + TCP_PORT_LENGTH)
 322 #define TCP_ADDRESS_OFFSET       (TCP_TRANSPORT_USE_OFFSET + TCP_TRANSPORT_USE_LENGTH)
 323
 324 static void
 325 dissect_tcp_transport_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 326 {
 327   tvbuff_t *parameters_tvb;
 328
 329   proto_tree_add_item(parameter_tree, hf_tcp_port,      parameter_tvb, TCP_PORT_OFFSET,          TCP_PORT_LENGTH,          ENC_BIG_ENDIAN);
 330   proto_tree_add_item(parameter_tree, hf_transport_use, parameter_tvb, TCP_TRANSPORT_USE_OFFSET, TCP_TRANSPORT_USE_LENGTH, ENC_BIG_ENDIAN);
 331
 332   parameters_tvb = tvb_new_subset_remaining(parameter_tvb, TCP_ADDRESS_OFFSET);
 333   dissect_parameters(parameters_tvb, parameter_tree);
 334 }
 335
 336 #define UDP_PORT_LENGTH     2
 337 #define UDP_RESERVED_LENGTH 2
 338 #define UDP_PORT_OFFSET     PARAMETER_VALUE_OFFSET
 339 #define UDP_RESERVED_OFFSET (UDP_PORT_OFFSET + UDP_PORT_LENGTH)
 340 #define UDP_ADDRESS_OFFSET  (UDP_RESERVED_OFFSET + UDP_RESERVED_LENGTH)
 341
 342 static void
 343 dissect_udp_transport_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 344 {
 345   tvbuff_t *parameters_tvb;
 346
 347   proto_tree_add_item(parameter_tree, hf_udp_port,     parameter_tvb, UDP_PORT_OFFSET,     UDP_PORT_LENGTH,     ENC_BIG_ENDIAN);
 348   proto_tree_add_item(parameter_tree, hf_udp_reserved, parameter_tvb, UDP_RESERVED_OFFSET, UDP_RESERVED_LENGTH, ENC_BIG_ENDIAN);
 349
 350   parameters_tvb = tvb_new_subset_remaining(parameter_tvb, UDP_ADDRESS_OFFSET);
 351   dissect_parameters(parameters_tvb, parameter_tree);
 352 }
 353
 354 #define UDP_LITE_PORT_LENGTH     2
 355 #define UDP_LITE_RESERVED_LENGTH 2
 356 #define UDP_LITE_PORT_OFFSET     PARAMETER_VALUE_OFFSET
 357 #define UDP_LITE_RESERVED_OFFSET (UDP_LITE_PORT_OFFSET + UDP_LITE_PORT_LENGTH)
 358 #define UDP_LITE_ADDRESS_OFFSET  (UDP_LITE_RESERVED_OFFSET + UDP_LITE_RESERVED_LENGTH)
 359
 360 static void
 361 dissect_udp_lite_transport_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 362 {
 363   tvbuff_t *parameters_tvb;
 364
 365   proto_tree_add_item(parameter_tree, hf_udp_lite_port,     parameter_tvb, UDP_LITE_PORT_OFFSET,     UDP_LITE_PORT_LENGTH,     ENC_BIG_ENDIAN);
 366   proto_tree_add_item(parameter_tree, hf_udp_lite_reserved, parameter_tvb, UDP_LITE_RESERVED_OFFSET, UDP_LITE_RESERVED_LENGTH, ENC_BIG_ENDIAN);
 367
 368   parameters_tvb = tvb_new_subset_remaining(parameter_tvb, UDP_LITE_ADDRESS_OFFSET);
 369   dissect_parameters(parameters_tvb, parameter_tree);
 370 }
 371
 372 #define POLICY_TYPE_LENGTH               4
 373 #define POLICY_WEIGHT_LENGTH             4
 374 #define POLICY_PRIORITY_LENGTH           4
 375 #define POLICY_LOAD_LENGTH               4
 376 #define POLICY_DEGRADATION_LENGTH        4
 377 #define POLICY_LUDPF_LOADDPF_LENGTH      4
 378 #define POLICY_LUDPF_DISTANCE_LENGTH     4
 379 #define POLICY_WRANDDPF_WEIGHTDPF_LENGTH 4
 380 #define POLICY_WRANDDPF_DISTANCE_LENGTH  4
 381
 382 #define POLICY_TYPE_OFFSET        PARAMETER_VALUE_OFFSET
 383 #define POLICY_VALUE_OFFSET       (POLICY_TYPE_OFFSET + POLICY_TYPE_LENGTH)
 384 #define POLICY_WEIGHT_OFFSET      POLICY_VALUE_OFFSET
 385 #define POLICY_PRIORITY_OFFSET    POLICY_VALUE_OFFSET
 386 #define POLICY_LOAD_OFFSET        POLICY_VALUE_OFFSET
 387 #define POLICY_DEGRADATION_OFFSET (POLICY_LOAD_OFFSET + POLICY_LOAD_LENGTH)
 388
 389 #define POLICY_LUDPF_LOADDPF_OFFSET      (POLICY_LOAD_OFFSET + POLICY_LOAD_LENGTH)
 390 #define POLICY_LUDPF_DISTANCE_OFFSET     (POLICY_LUDPF_LOADDPF_OFFSET + POLICY_LUDPF_LOADDPF_LENGTH)
 391 #define POLICY_WRANDDPF_WEIGHTDPF_OFFSET (POLICY_WEIGHT_OFFSET + POLICY_WEIGHT_LENGTH)
 392 #define POLICY_WRANDDPF_DISTANCE_OFFSET  (POLICY_WRANDDPF_WEIGHTDPF_OFFSET + POLICY_WRANDDPF_WEIGHTDPF_LENGTH)
 393
 394
 395 #define ROUND_ROBIN_POLICY           0x00000001
 396 #define WEIGHTED_ROUND_ROBIN_POLICY  0x00000002
 397 #define RANDOM_POLICY                0x00000003
 398 #define WEIGHTED_RANDOM_POLICY       0x00000004
 399 #define PRIORITY_POLICY              0x00000005
 400 #define LEAST_USED_POLICY            0x40000001
 401 #define LEAST_USED_WITH_DEG_POLICY   0x40000002
 402 #define PRIORITY_LEAST_USED_POLICY   0x40000003
 403 #define RANDOMIZED_LEAST_USED_POLICY 0x40000004
 404
 405 #define PRIORITY_LEAST_USED_DEG_POLICY 0xb0001003
 406 #define WEIGHTED_RANDOM_DPF_POLICY     0xb0002001
 407 #define LEAST_USED_DPF_POLICY          0xb0002002
 408
 409 static const value_string policy_type_values[] = {
 410   { ROUND_ROBIN_POLICY,             "Round Robin (RR)" },
 411   { WEIGHTED_ROUND_ROBIN_POLICY,    "Weighted Round Robin (WRR)" },
 412   { RANDOM_POLICY,                  "Random (RAND)"},
 413   { WEIGHTED_RANDOM_POLICY,         "Weighted Random (WRAND)" },
 414   { PRIORITY_POLICY,                "Priority (PRI)" },
 415   { LEAST_USED_POLICY,              "Least Used (LU)" },
 416   { LEAST_USED_WITH_DEG_POLICY,     "Least Used with Degradation (LUD)" },
 417   { PRIORITY_LEAST_USED_POLICY,     "Priority Least Used (PLU)" },
 418   { PRIORITY_LEAST_USED_DEG_POLICY, "Priority Least Used with Degradation (PLUD)" },
 419   { RANDOMIZED_LEAST_USED_POLICY,   "Randomized Least Used (RLU)" },
 420   { LEAST_USED_DPF_POLICY,          "Least Used with Delay Penalty Factor (LU-DPF)" },
 421   { WEIGHTED_RANDOM_DPF_POLICY,     "Weighted Random with Delay Penalty Factor (WRAND-DPF)" },
 422   { 0,                              NULL } };
 423
 424 static void
 425 dissect_pool_member_selection_policy_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 426 {
 427   guint32 type;
 428   guint   length;
 429
 430   proto_tree_add_item(parameter_tree, hf_policy_type,  parameter_tvb, POLICY_TYPE_OFFSET,  POLICY_TYPE_LENGTH,  ENC_BIG_ENDIAN);
 431   type = tvb_get_ntohl(parameter_tvb, POLICY_TYPE_OFFSET);
 432   switch (type) {
 433   case RANDOM_POLICY:
 434   case ROUND_ROBIN_POLICY:
 435     break;
 436   case WEIGHTED_RANDOM_POLICY:
 437   case WEIGHTED_ROUND_ROBIN_POLICY:
 438     proto_tree_add_item(parameter_tree, hf_policy_weight, parameter_tvb, POLICY_WEIGHT_OFFSET, POLICY_WEIGHT_LENGTH, ENC_BIG_ENDIAN);
 439     break;
 440   case PRIORITY_POLICY:
 441     proto_tree_add_item(parameter_tree, hf_policy_priority, parameter_tvb, POLICY_PRIORITY_OFFSET, POLICY_PRIORITY_LENGTH, ENC_BIG_ENDIAN);
 442     break;
 443   case LEAST_USED_POLICY:
 444   case RANDOMIZED_LEAST_USED_POLICY:
 445     proto_tree_add_double_format_value(parameter_tree, hf_policy_load, parameter_tvb, POLICY_LOAD_OFFSET, POLICY_LOAD_LENGTH,
 446                                        100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff, "%1.2f%%",
 447                                        100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff);
 448     break;
 449   case LEAST_USED_WITH_DEG_POLICY:
 450   case PRIORITY_LEAST_USED_POLICY:
 451     proto_tree_add_double_format_value(parameter_tree, hf_policy_load, parameter_tvb, POLICY_LOAD_OFFSET, POLICY_LOAD_LENGTH,
 452                                        100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff, "%1.2f%%",
 453                                        100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff);
 454     proto_tree_add_double_format_value(parameter_tree, hf_policy_degradation, parameter_tvb, POLICY_DEGRADATION_OFFSET, POLICY_DEGRADATION_LENGTH,
 455                                        100.0 * tvb_get_ntohl(parameter_tvb, POLICY_DEGRADATION_OFFSET) / (double)0xffffffff, "%1.2f%%",
 456                                        100.0 * tvb_get_ntohl(parameter_tvb, POLICY_DEGRADATION_OFFSET) / (double)0xffffffff);
 457     break;
 458   case LEAST_USED_DPF_POLICY:
 459     proto_tree_add_double_format_value(parameter_tree, hf_policy_load, parameter_tvb, POLICY_LOAD_OFFSET, POLICY_LOAD_LENGTH,
 460                                       100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff, "%1.2f%%",
 461                                       100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff);
 462     proto_tree_add_double_format_value(parameter_tree, hf_policy_loaddpf, parameter_tvb, POLICY_LUDPF_LOADDPF_OFFSET, POLICY_LUDPF_LOADDPF_LENGTH,
 463                                       tvb_get_ntohl(parameter_tvb, POLICY_LUDPF_LOADDPF_OFFSET) / (double)0xffffffff, "%1.5f",
 464                                       tvb_get_ntohl(parameter_tvb, POLICY_LUDPF_LOADDPF_OFFSET) / (double)0xffffffff);
 465     proto_tree_add_item(parameter_tree, hf_policy_distance, parameter_tvb, POLICY_LUDPF_DISTANCE_OFFSET, POLICY_LUDPF_DISTANCE_LENGTH, ENC_BIG_ENDIAN);
 466     break;
 467   case WEIGHTED_RANDOM_DPF_POLICY:
 468     proto_tree_add_item(parameter_tree, hf_policy_weight, parameter_tvb, POLICY_WEIGHT_OFFSET, POLICY_WEIGHT_LENGTH, ENC_BIG_ENDIAN);
 469     proto_tree_add_double_format_value(parameter_tree, hf_policy_weightdpf, parameter_tvb, POLICY_WRANDDPF_WEIGHTDPF_OFFSET, POLICY_WRANDDPF_WEIGHTDPF_LENGTH,
 470                                        tvb_get_ntohl(parameter_tvb, POLICY_WRANDDPF_WEIGHTDPF_OFFSET) / (double)0xffffffff, "%1.5f",
 471                                        tvb_get_ntohl(parameter_tvb, POLICY_WRANDDPF_WEIGHTDPF_OFFSET) / (double)0xffffffff);
 472     proto_tree_add_item(parameter_tree, hf_policy_distance, parameter_tvb, POLICY_WRANDDPF_DISTANCE_OFFSET, POLICY_WRANDDPF_DISTANCE_LENGTH, ENC_BIG_ENDIAN);
 473     break;
 474   default:
 475     length = tvb_length(parameter_tvb) - POLICY_VALUE_OFFSET;
 476     if (length > 0) {
 477       proto_tree_add_item(parameter_tree, hf_policy_value, parameter_tvb, POLICY_VALUE_OFFSET, length, ENC_NA);
 478     }
 479     break;
 480   }
 481 }
 482
 483 #define POOL_HANDLE_OFFSET PARAMETER_VALUE_OFFSET
 484
 485 static void
 486 dissect_pool_handle_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 487 {
 488   guint16 handle_length;
 489   proto_item*    pi;
 490   char*          tmp;
 491
 492   handle_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 493   pi = proto_tree_add_item(parameter_tree, hf_pool_handle, parameter_tvb, POOL_HANDLE_OFFSET, handle_length, ENC_NA);
 494
 495   tmp = (gchar*)tvb_get_string(wmem_packet_scope(), parameter_tvb, POOL_HANDLE_OFFSET, handle_length);
 496   proto_item_append_text(pi, " (%s)", tmp);
 497 }
 498
 499 #define PE_PE_IDENTIFIER_LENGTH         4
 500 #define HOME_ENRP_INDENTIFIER_LENGTH    4
 501 #define REGISTRATION_LIFE_LENGTH        4
 502
 503 #define PE_PE_IDENTIFIER_OFFSET         PARAMETER_VALUE_OFFSET
 504 #define HOME_ENRP_INDENTIFIER_OFFSET    (PE_PE_IDENTIFIER_OFFSET + PE_PE_IDENTIFIER_LENGTH)
 505 #define REGISTRATION_LIFE_OFFSET        (HOME_ENRP_INDENTIFIER_OFFSET + HOME_ENRP_INDENTIFIER_LENGTH)
 506 #define USER_TRANSPORT_PARAMETER_OFFSET (REGISTRATION_LIFE_OFFSET + REGISTRATION_LIFE_LENGTH)
 507
 508 static void
 509 dissect_pool_element_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 510 {
 511   tvbuff_t*   parameters_tvb;
 512   proto_item* pi;
 513
 514   proto_tree_add_item(parameter_tree, hf_pe_pe_identifier, parameter_tvb, PE_PE_IDENTIFIER_OFFSET,      PE_PE_IDENTIFIER_LENGTH,      ENC_BIG_ENDIAN);
 515   proto_tree_add_item(parameter_tree, hf_home_enrp_id,     parameter_tvb, HOME_ENRP_INDENTIFIER_OFFSET, HOME_ENRP_INDENTIFIER_LENGTH, ENC_BIG_ENDIAN);
 516   pi = proto_tree_add_item(parameter_tree, hf_reg_life,    parameter_tvb, REGISTRATION_LIFE_OFFSET,     REGISTRATION_LIFE_LENGTH,     ENC_BIG_ENDIAN);
 517   proto_item_append_text(pi, "ms");
 518
 519   parameters_tvb = tvb_new_subset_remaining(parameter_tvb, USER_TRANSPORT_PARAMETER_OFFSET);
 520   dissect_parameters(parameters_tvb, parameter_tree);
 521 }
 522
 523 #define SERVER_ID_LENGTH         4
 524 #define SERVER_ID_OFFSET         PARAMETER_VALUE_OFFSET
 525 #define SERVER_TRANSPORT_OFFSET  (SERVER_ID_OFFSET + SERVER_ID_LENGTH)
 526
 527 static void
 528 dissect_server_information_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 529 {
 530   tvbuff_t *parameters_tvb;
 531
 532   proto_tree_add_item(parameter_tree, hf_server_identifier, parameter_tvb, SERVER_ID_OFFSET, SERVER_ID_LENGTH, ENC_BIG_ENDIAN);
 533
 534   parameters_tvb = tvb_new_subset_remaining(parameter_tvb, SERVER_TRANSPORT_OFFSET);
 535   dissect_parameters(parameters_tvb, parameter_tree);
 536 }
 537
 538 #define ERROR_CAUSES_OFFSET PARAMETER_VALUE_OFFSET
 539
 540 static void
 541 dissect_operation_error_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 542 {
 543   tvbuff_t *error_causes_tvb;
 544
 545   error_causes_tvb = tvb_new_subset_remaining(parameter_tvb, ERROR_CAUSES_OFFSET);
 546   dissect_error_causes(error_causes_tvb, parameter_tree);
 547 }
 548
 549 #define COOKIE_OFFSET PARAMETER_VALUE_OFFSET
 550
 551 static void
 552 dissect_cookie_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 553 {
 554   guint16 cookie_length;
 555
 556   cookie_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 557   if (cookie_length > 0)
 558     proto_tree_add_item(parameter_tree, hf_cookie, parameter_tvb, COOKIE_OFFSET, cookie_length, ENC_NA);
 559   proto_item_append_text(parameter_item, " (%u byte%s)", cookie_length, plurality(cookie_length, "", "s"));
 560 }
 561
 562 #define PE_IDENTIFIER_LENGTH 4
 563 #define PE_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
 564
 565 static void
 566 dissect_pe_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 567 {
 568   proto_tree_add_item(parameter_tree, hf_pe_identifier, parameter_tvb, PE_IDENTIFIER_OFFSET, PE_IDENTIFIER_LENGTH, ENC_BIG_ENDIAN);
 569   proto_item_append_text(parameter_item, " (0x%x)", tvb_get_ntohl(parameter_tvb, PE_IDENTIFIER_OFFSET));
 570 }
 571
 572 #define PE_CHECKSUM_LENGTH 2
 573 #define PE_CHECKSUM_OFFSET PARAMETER_VALUE_OFFSET
 574
 575 static void
 576 dissect_pe_checksum_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 577 {
 578   proto_tree_add_item(parameter_tree, hf_pe_checksum, parameter_tvb, PE_CHECKSUM_OFFSET, PE_CHECKSUM_LENGTH, ENC_BIG_ENDIAN);
 579   proto_item_append_text(parameter_item, " (0x%x)", tvb_get_ntohs(parameter_tvb, PE_CHECKSUM_OFFSET));
 580 }
 581
 582 #define HROPT_ITEMS_LENGTH 4
 583 #define HROPT_ITEMS_OFFSET PARAMETER_VALUE_OFFSET
 584
 585 static void
 586 dissect_handle_resolution_option_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 587 {
 588   proto_tree_add_item(parameter_tree, hf_hropt_items, parameter_tvb, HROPT_ITEMS_OFFSET, HROPT_ITEMS_LENGTH, ENC_BIG_ENDIAN);
 589 }
 590
 591 static void
 592 dissect_unknown_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 593 {
 594   guint16 type, parameter_value_length;
 595
 596   type                   = tvb_get_ntohs(parameter_tvb, PARAMETER_TYPE_OFFSET);
 597   parameter_value_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 598
 599   if (parameter_value_length > 0)
 600     proto_tree_add_item(parameter_tree, hf_parameter_value, parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, ENC_NA);
 601
 602   proto_item_append_text(parameter_item, " (type %u and %u byte%s value)", type, parameter_value_length, plurality(parameter_value_length, "", "s"));
 603 }
 604
 605 #define IPV4_ADDRESS_PARAMETER_TYPE                 0x01
 606 #define IPV6_ADDRESS_PARAMETER_TYPE                 0x02
 607 #define DCCP_TRANSPORT_PARAMETER_TYPE               0x03
 608 #define SCTP_TRANSPORT_PARAMETER_TYPE               0x04
 609 #define TCP_TRANSPORT_PARAMETER_TYPE                0x05
 610 #define UDP_TRANSPORT_PARAMETER_TYPE                0x06
 611 #define UDP_LITE_TRANSPORT_PARAMETER_TYPE           0x07
 612 #define POOL_MEMBER_SELECTION_POLICY_PARAMETER_TYPE 0x08
 613 #define POOL_HANDLE_PARAMETER_TYPE                  0x09
 614 #define POOL_ELEMENT_PARAMETER_TYPE                 0x0a
 615 #define SERVER_INFORMATION_PARAMETER_TYPE           0x0b
 616 #define OPERATION_ERROR_PARAMETER_TYPE              0x0c
 617 #define COOKIE_PARAMETER_TYPE                       0x0d
 618 #define PE_IDENTIFIER_PARAMETER_TYPE                0x0e
 619 #define PE_CHECKSUM_PARAMETER_TYPE                  0x0f
 620 #define HANDLE_RESOLUTION_OPTION_PARAMETER_TYPE     0x803f
 621
 622 static const value_string parameter_type_values[] = {
 623   { IPV4_ADDRESS_PARAMETER_TYPE,                 "IPV4 Address Parameter" },
 624   { IPV6_ADDRESS_PARAMETER_TYPE,                 "IPV6 Address Parameter" },
 625   { DCCP_TRANSPORT_PARAMETER_TYPE,               "DCCP Transport Address Parameter" },
 626   { SCTP_TRANSPORT_PARAMETER_TYPE,               "SCTP Transport Address Parameter" },
 627   { TCP_TRANSPORT_PARAMETER_TYPE,                "TCP Transport Address Parameter" },
 628   { UDP_TRANSPORT_PARAMETER_TYPE,                "UDP Transport Address Parameter" },
 629   { UDP_LITE_TRANSPORT_PARAMETER_TYPE,           "UDP-Lite Transport Address Parameter" },
 630   { POOL_MEMBER_SELECTION_POLICY_PARAMETER_TYPE, "Pool Member Selection Policy Parameter" },
 631   { POOL_HANDLE_PARAMETER_TYPE,                  "Pool Handle Parameter" },
 632   { POOL_ELEMENT_PARAMETER_TYPE,                 "Pool Element Parameter" },
 633   { SERVER_INFORMATION_PARAMETER_TYPE,           "Server Information Parameter" },
 634   { OPERATION_ERROR_PARAMETER_TYPE,              "Operation Error Parameter" },
 635   { COOKIE_PARAMETER_TYPE,                       "Cookie Parameter" },
 636   { PE_IDENTIFIER_PARAMETER_TYPE,                "Pool Element Identifier Parameter" },
 637   { PE_CHECKSUM_PARAMETER_TYPE,                  "PE Checksum Parameter" },
 638   { HANDLE_RESOLUTION_OPTION_PARAMETER_TYPE,     "Handle Resolution Option Parameter" },
 639   { 0,                                           NULL } };
 640
 641
 642 static void
 643 dissect_parameter(tvbuff_t *parameter_tvb, proto_tree *asap_tree)
 644 {
 645   guint16 type, length, padding_length;
 646   proto_item *parameter_item;
 647   proto_tree *parameter_tree;
 648
 649   /* extract tag and length from the parameter */
 650   type           = tvb_get_ntohs(parameter_tvb, PARAMETER_TYPE_OFFSET);
 651   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 652   padding_length = tvb_length(parameter_tvb) - length;
 653
 654   /* create proto_tree stuff */
 655   parameter_item   = proto_tree_add_text(asap_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, tvb_length(parameter_tvb), "%s", val_to_str_const(type, parameter_type_values, "Unknown Parameter"));
 656   parameter_tree   = proto_item_add_subtree(parameter_item, ett_asap_parameter);
 657
 658   /* add tag and length to the asap tree */
 659   proto_tree_add_item(parameter_tree, hf_parameter_type,   parameter_tvb, PARAMETER_TYPE_OFFSET,   PARAMETER_TYPE_LENGTH,   ENC_BIG_ENDIAN);
 660   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, ENC_BIG_ENDIAN);
 661
 662   switch(type) {
 663   case IPV4_ADDRESS_PARAMETER_TYPE:
 664     dissect_ipv4_parameter(parameter_tvb, parameter_tree, parameter_item);
 665     break;
 666   case IPV6_ADDRESS_PARAMETER_TYPE:
 667     dissect_ipv6_parameter(parameter_tvb, parameter_tree, parameter_item);
 668     break;
 669   case DCCP_TRANSPORT_PARAMETER_TYPE:
 670     dissect_dccp_transport_parameter(parameter_tvb, parameter_tree);
 671     break;
 672   case SCTP_TRANSPORT_PARAMETER_TYPE:
 673     dissect_sctp_transport_parameter(parameter_tvb, parameter_tree);
 674     break;
 675   case TCP_TRANSPORT_PARAMETER_TYPE:
 676     dissect_tcp_transport_parameter(parameter_tvb, parameter_tree);
 677     break;
 678   case UDP_TRANSPORT_PARAMETER_TYPE:
 679     dissect_udp_transport_parameter(parameter_tvb, parameter_tree);
 680     break;
 681   case UDP_LITE_TRANSPORT_PARAMETER_TYPE:
 682     dissect_udp_lite_transport_parameter(parameter_tvb, parameter_tree);
 683     break;
 684   case POOL_MEMBER_SELECTION_POLICY_PARAMETER_TYPE:
 685     dissect_pool_member_selection_policy_parameter(parameter_tvb, parameter_tree);
 686     break;
 687   case POOL_HANDLE_PARAMETER_TYPE:
 688     dissect_pool_handle_parameter(parameter_tvb, parameter_tree);
 689     break;
 690   case POOL_ELEMENT_PARAMETER_TYPE:
 691     dissect_pool_element_parameter(parameter_tvb, parameter_tree);
 692     break;
 693   case SERVER_INFORMATION_PARAMETER_TYPE:
 694     dissect_server_information_parameter(parameter_tvb, parameter_tree);
 695     break;
 696   case OPERATION_ERROR_PARAMETER_TYPE:
 697     dissect_operation_error_parameter(parameter_tvb, parameter_tree);
 698     break;
 699   case COOKIE_PARAMETER_TYPE:
 700     dissect_cookie_parameter(parameter_tvb, parameter_tree, parameter_item);
 701     break;
 702   case PE_IDENTIFIER_PARAMETER_TYPE:
 703     dissect_pe_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
 704     break;
 705   case PE_CHECKSUM_PARAMETER_TYPE:
 706     dissect_pe_checksum_parameter(parameter_tvb, parameter_tree, parameter_item);
 707     break;
 708   case HANDLE_RESOLUTION_OPTION_PARAMETER_TYPE:
 709     dissect_handle_resolution_option_parameter(parameter_tvb, parameter_tree);
 710     break;
 711   default:
 712     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
 713     break;
 714   };
 715
 716   if (padding_length > 0)
 717     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, ENC_NA);
 718 }
 719
 720 static void
 721 dissect_parameters(tvbuff_t *parameters_tvb, proto_tree *tree)
 722 {
 723   gint offset, length, total_length, remaining_length;
 724   tvbuff_t *parameter_tvb;
 725
 726   offset = 0;
 727   while((remaining_length = tvb_length_remaining(parameters_tvb, offset)) > 0) {
 728     length       = tvb_get_ntohs(parameters_tvb, offset + PARAMETER_LENGTH_OFFSET);
 729     total_length = ADD_PADDING(length);
 730     if (remaining_length >= length)
 731       total_length = MIN(total_length, remaining_length);
 732     /* create a tvb for the parameter including the padding bytes */
 733     parameter_tvb  = tvb_new_subset(parameters_tvb, offset, total_length, total_length);
 734     dissect_parameter(parameter_tvb, tree);
 735     /* get rid of the handled parameter */
 736     offset += total_length;
 737   }
 738 }
 739
 740 /* Dissectors for messages. This is specific to ASAP */
 741
 742 #define MESSAGE_TYPE_LENGTH   1
 743 #define MESSAGE_FLAGS_LENGTH  1
 744 #define MESSAGE_LENGTH_LENGTH 2
 745
 746 #define MESSAGE_TYPE_OFFSET   0
 747 #define MESSAGE_FLAGS_OFFSET  (MESSAGE_TYPE_OFFSET   + MESSAGE_TYPE_LENGTH)
 748 #define MESSAGE_LENGTH_OFFSET (MESSAGE_FLAGS_OFFSET  + MESSAGE_FLAGS_LENGTH)
 749 #define MESSAGE_VALUE_OFFSET  (MESSAGE_LENGTH_OFFSET + MESSAGE_LENGTH_LENGTH)
 750
 751 #define REGISTRATION_MESSAGE_TYPE               0x01
 752 #define DEREGISTRATION_MESSAGE_TYPE             0x02
 753 #define REGISTRATION_RESPONSE_MESSAGE_TYPE      0x03
 754 #define DEREGISTRATION_RESPONSE_MESSAGE_TYPE    0x04
 755 #define HANDLE_RESOLUTION_MESSAGE_TYPE          0x05
 756 #define HANDLE_RESOLUTION_RESPONSE_MESSAGE_TYPE 0x06
 757 #define ENDPOINT_KEEP_ALIVE_MESSAGE_TYPE        0x07
 758 #define ENDPOINT_KEEP_ALIVE_ACK_MESSAGE_TYPE    0x08
 759 #define ENDPOINT_UNREACHABLE_MESSAGE_TYPE       0x09
 760 #define SERVER_ANNOUNCE_MESSAGE_TYPE            0x0a
 761 #define COOKIE_MESSAGE_TYPE                     0x0b
 762 #define COOKIE_ECHO_MESSAGE_TYPE                0x0c
 763 #define BUSINESS_CARD_MESSAGE_TYPE              0x0d
 764 #define ERROR_MESSAGE_TYPE                      0x0e
 765
 766 static const value_string message_type_values[] = {
 767   { REGISTRATION_MESSAGE_TYPE,               "ASAP Registration" },
 768   { DEREGISTRATION_MESSAGE_TYPE,             "ASAP Deregistration" },
 769   { REGISTRATION_RESPONSE_MESSAGE_TYPE,      "ASAP Registration Response" },
 770   { DEREGISTRATION_RESPONSE_MESSAGE_TYPE,    "ASAP Deregistration Response" },
 771   { HANDLE_RESOLUTION_MESSAGE_TYPE,          "ASAP Handle Resolution" },
 772   { HANDLE_RESOLUTION_RESPONSE_MESSAGE_TYPE, "ASAP Handle Resolution Response" },
 773   { ENDPOINT_KEEP_ALIVE_MESSAGE_TYPE,        "ASAP Endpoint Keep-Alive" },
 774   { ENDPOINT_KEEP_ALIVE_ACK_MESSAGE_TYPE,    "ASAP Endpoint Keep-Alive Acknowledgement" },
 775   { ENDPOINT_UNREACHABLE_MESSAGE_TYPE,       "ASAP Endpoint Unreachable" },
 776   { SERVER_ANNOUNCE_MESSAGE_TYPE,            "ASAP Server Announce" },
 777   { COOKIE_MESSAGE_TYPE,                     "ASAP Cookie" },
 778   { COOKIE_ECHO_MESSAGE_TYPE,                "ASAP Cookie Echo" },
 779   { BUSINESS_CARD_MESSAGE_TYPE,              "ASAP Business Card" },
 780   { ERROR_MESSAGE_TYPE,                      "ASAP Error" },
 781   { 0,                                       NULL } };
 782
 783 #define SERVER_IDENTIFIER_OFFSET MESSAGE_VALUE_OFFSET
 784 #define SERVER_IDENTIFIER_LENGTH 4
 785
 786 #define HOME_ENRP_SERVER_BIT_MASK 0x01
 787 #define REJECT_BIT_MASK           0x01
 788
 789 static const true_false_string home_enrp_server_bit_value = {
 790   "Want to be new ENRP server",
 791   "Do not want to be new ENRP server"
 792 };
 793
 794 static const true_false_string reject_bit_value = {
 795   "Rejected",
 796   "Accepted"
 797 };
 798
 799 static void
 800 dissect_asap_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *asap_tree)
 801 {
 802   tvbuff_t   *parameters_tvb;
 803   proto_item *flags_item;
 804   proto_tree *flags_tree;
 805   guint8      type;
 806
 807
 808   type = tvb_get_guint8(message_tvb, MESSAGE_TYPE_OFFSET);
 809   /* pinfo is NULL only if dissect_asap_message is called via dissect_error_cause */
 810   if (pinfo)
 811    col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(type, message_type_values, "Unknown ASAP type"));
 812
 813   if (asap_tree) {
 814     proto_tree_add_item(asap_tree, hf_message_type,   message_tvb, MESSAGE_TYPE_OFFSET,   MESSAGE_TYPE_LENGTH,   ENC_BIG_ENDIAN);
 815     flags_item = proto_tree_add_item(asap_tree, hf_message_flags,  message_tvb, MESSAGE_FLAGS_OFFSET,  MESSAGE_FLAGS_LENGTH,  ENC_BIG_ENDIAN);
 816     flags_tree = proto_item_add_subtree(flags_item, ett_asap_flags);
 817     if (type == REGISTRATION_RESPONSE_MESSAGE_TYPE) {
 818       proto_tree_add_item(flags_tree, hf_reject_bit, message_tvb, MESSAGE_FLAGS_OFFSET, MESSAGE_FLAGS_LENGTH, ENC_BIG_ENDIAN);
 819     }
 820     if (type == ENDPOINT_KEEP_ALIVE_MESSAGE_TYPE) {
 821       proto_tree_add_item(flags_tree, hf_home_enrp_server_bit, message_tvb, MESSAGE_FLAGS_OFFSET, MESSAGE_FLAGS_LENGTH, ENC_BIG_ENDIAN);
 822     }
 823     proto_tree_add_item(asap_tree, hf_message_length, message_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, ENC_BIG_ENDIAN);
 824     if ((type == SERVER_ANNOUNCE_MESSAGE_TYPE) || (type == ENDPOINT_KEEP_ALIVE_MESSAGE_TYPE)) {
 825       proto_tree_add_item(asap_tree, hf_server_identifier, message_tvb, SERVER_IDENTIFIER_OFFSET, SERVER_IDENTIFIER_LENGTH, ENC_BIG_ENDIAN);
 826       parameters_tvb = tvb_new_subset_remaining(message_tvb, MESSAGE_VALUE_OFFSET + SERVER_IDENTIFIER_LENGTH);
 827     } else {
 828       parameters_tvb = tvb_new_subset_remaining(message_tvb, MESSAGE_VALUE_OFFSET);
 829     }
 830     dissect_parameters(parameters_tvb, asap_tree);
 831     }
 832 }
 833
 834 static void
 835 dissect_asap(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree)
 836 {
 837   proto_item *asap_item;
 838   proto_tree *asap_tree;
 839
 840   /* pinfo is NULL only if dissect_asap is called from dissect_error_cause */
 841   if (pinfo)
 842     col_set_str(pinfo->cinfo, COL_PROTOCOL, "ASAP");
 843
 844   /* In the interest of speed, if "tree" is NULL, don't do any work not
 845      necessary to generate protocol tree items. */
 846   if (tree) {
 847     /* create the asap protocol tree */
 848     asap_item = proto_tree_add_item(tree, proto_asap, message_tvb, 0, -1, ENC_NA);
 849     asap_tree = proto_item_add_subtree(asap_item, ett_asap);
 850   } else {
 851     asap_tree = NULL;
 852   };
 853   /* dissect the message */
 854   dissect_asap_message(message_tvb, pinfo, asap_tree);
 855 }
 856
 857 /* Register the protocol with Wireshark */
 858 void
 859 proto_register_asap(void)
 860 {
 861
 862   /* Setup list of header fields */
 863   static hf_register_info hf[] = {
 864     { &hf_message_type,           { "Type",                        "asap.message_type",                             FT_UINT8,   BASE_DEC,  VALS(message_type_values),        0x0,                       NULL, HFILL } },
 865     { &hf_message_flags,          { "Flags",                       "asap.message_flags",                            FT_UINT8,   BASE_HEX,  NULL,                             0x0,                       NULL, HFILL } },
 866     { &hf_message_length,         { "Length",                      "asap.message_length",                           FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
 867     { &hf_cause_code,             { "Cause Code",                  "asap.cause_code",                               FT_UINT16,  BASE_HEX,  VALS(cause_code_values),          0x0,                       NULL, HFILL } },
 868     { &hf_cause_length,           { "Cause Length",                "asap.cause_length",                             FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
 869     { &hf_cause_info,             { "Cause Info",                  "asap.cause_info",                               FT_BYTES,   BASE_NONE, NULL,                             0x0,                       NULL, HFILL } },
 870     { &hf_cause_padding,          { "Padding",                     "asap.cause_padding",                            FT_BYTES,   BASE_NONE, NULL,                             0x0,                       NULL, HFILL } },
 871     { &hf_parameter_type,         { "Parameter Type",              "asap.parameter_type",                           FT_UINT16,  BASE_HEX,  VALS(parameter_type_values),      0x0,                       NULL, HFILL } },
 872     { &hf_parameter_length,       { "Parameter Length",            "asap.parameter_length",                         FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
 873     { &hf_parameter_value,        { "Parameter Value",             "asap.parameter_value",                          FT_BYTES,   BASE_NONE, NULL,                             0x0,                       NULL, HFILL } },
 874     { &hf_parameter_padding,      { "Padding",                     "asap.parameter_padding",                        FT_BYTES,   BASE_NONE, NULL,                             0x0,                       NULL, HFILL } },
 875     { &hf_parameter_ipv4_address, { "IP Version 4 Address",        "asap.ipv4_address",                             FT_IPv4,    BASE_NONE, NULL,                             0x0,                       NULL, HFILL } },
 876     { &hf_parameter_ipv6_address, { "IP Version 6 Address",        "asap.ipv6_address",                             FT_IPv6,    BASE_NONE, NULL,                             0x0,                       NULL, HFILL } },
 877     { &hf_dccp_port,              { "Port",                        "asap.dccp_transport_port",                      FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
 878     { &hf_dccp_reserved,          { "Reserved",                    "asap.dccp_transport_reserved",                  FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
 879     { &hf_dccp_service_code,      { "Service Code",                "asap.dccp_transport_service_code",              FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
 880     { &hf_sctp_port,              { "Port",                        "asap.sctp_transport_port",                      FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
 881     { &hf_transport_use,          { "Transport Use",               "asap.transport_use",                            FT_UINT16,  BASE_DEC,  VALS(transport_use_values),       0x0,                       NULL, HFILL } },
 882     { &hf_tcp_port,               { "Port",                        "asap.tcp_transport_port",                       FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
 883     { &hf_udp_port,               { "Port",                        "asap.udp_transport_port",                       FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
 884     { &hf_udp_reserved,           { "Reserved",                    "asap.udp_transport_reserved",                   FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
 885     { &hf_udp_lite_port,          { "Port",                        "asap.udp_lite_transport_port",                  FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
 886     { &hf_udp_lite_reserved,      { "Reserved",                    "asap.udp_lite_transport_reserved",              FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
 887     { &hf_policy_type,            { "Policy Type",                 "asap.pool_member_selection_policy_type",        FT_UINT32,  BASE_HEX,  VALS(policy_type_values),         0x0,                       NULL, HFILL } },
 888     { &hf_policy_weight,          { "Policy Weight",               "asap.pool_member_selection_policy_weight",      FT_UINT32,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
 889     { &hf_policy_priority,        { "Policy Priority",             "asap.pool_member_selection_policy_priority",    FT_UINT32,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
 890     { &hf_policy_load,            { "Policy Load",                 "asap.pool_member_selection_policy_load",        FT_DOUBLE,  BASE_NONE,  NULL,                             0x0,                       NULL, HFILL } },
 891     { &hf_policy_degradation,     { "Policy Degradation",          "asap.pool_member_selection_policy_degradation", FT_DOUBLE,  BASE_NONE,  NULL,                             0x0,                       NULL, HFILL } },
 892     { &hf_policy_loaddpf,         { "Policy Load DPF",             "asap.pool_member_selection_policy_load_dpf",    FT_DOUBLE,  BASE_NONE,  NULL,                             0x0,                       NULL, HFILL } },
 893     { &hf_policy_weightdpf,       { "Policy Weight DPF",           "asap.pool_member_selection_policy_weight_dpf",  FT_DOUBLE,  BASE_NONE,  NULL,                             0x0,                       NULL, HFILL } },
 894     { &hf_policy_distance,        { "Policy Distance",             "asap.pool_member_selection_policy_distance",    FT_UINT32,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
 895     { &hf_policy_value,           { "Policy Value",                "asap.pool_member_selection_policy_value",       FT_BYTES,   BASE_NONE, NULL,                             0x0,                       NULL, HFILL } },
 896     { &hf_pool_handle,            { "Pool Handle",                 "asap.pool_handle_pool_handle",                  FT_BYTES,   BASE_NONE,  NULL,                             0x0,                       NULL, HFILL } },
 897     { &hf_pe_pe_identifier,       { "PE Identifier",               "asap.pool_element_pe_identifier",               FT_UINT32,  BASE_HEX,  NULL,                             0x0,                       NULL, HFILL } },
 898     { &hf_home_enrp_id,           { "Home ENRP Server Identifier", "asap.pool_element_home_enrp_server_identifier", FT_UINT32,  BASE_HEX,  NULL,                             0x0,                       NULL, HFILL } },
 899     { &hf_reg_life,               { "Registration Life",           "asap.pool_element_registration_life",           FT_INT32,   BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
 900     { &hf_cookie,                 { "Cookie",                      "asap.cookie",                                   FT_BYTES,   BASE_NONE,  NULL,                             0x0,                       NULL, HFILL } },
 901     { &hf_pe_identifier,          { "PE Identifier",               "asap.pe_identifier",                            FT_UINT32,  BASE_HEX,  NULL,                             0x0,                       NULL, HFILL } },
 902     { &hf_pe_checksum,            { "PE Checksum",                 "asap.pe_checksum",                              FT_UINT32,  BASE_HEX,  NULL,                             0x0,                       NULL, HFILL } },
 903     { &hf_hropt_items,            { "Items",                       "asap.hropt_items",                              FT_UINT32,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
 904     { &hf_server_identifier,      { "Server Identifier",           "asap.server_identifier",                        FT_UINT32,  BASE_HEX,  NULL,                             0x0,                       NULL, HFILL } },
 905     { &hf_home_enrp_server_bit,   { "H Bit",                       "asap.h_bit",                                    FT_BOOLEAN, 8,         TFS(&home_enrp_server_bit_value), HOME_ENRP_SERVER_BIT_MASK, NULL, HFILL } },
 906     { &hf_reject_bit,             { "R Bit",                       "asap.r_bit",                                    FT_BOOLEAN, 8,         TFS(&reject_bit_value),           REJECT_BIT_MASK,           NULL, HFILL } },
 907   };
 908
 909   /* Setup protocol subtree array */
 910   static gint *ett[] = {
 911     &ett_asap,
 912     &ett_asap_flags,
 913     &ett_asap_parameter,
 914     &ett_asap_cause,
 915   };
 916
 917   /* Register the protocol name and description */
 918   proto_asap = proto_register_protocol("Aggregate Server Access Protocol", "ASAP",  "asap");
 919
 920   /* Required function calls to register the header fields and subtrees used */
 921   proto_register_field_array(proto_asap, hf, array_length(hf));
 922   proto_register_subtree_array(ett, array_length(ett));
 923
 924 }
 925
 926 void
 927 proto_reg_handoff_asap(void)
 928 {
 929   dissector_handle_t asap_handle;
 930
 931   asap_handle = create_dissector_handle(dissect_asap, proto_asap);
 932   dissector_add_uint("sctp.ppi",  ASAP_PAYLOAD_PROTOCOL_ID, asap_handle);
 933   dissector_add_uint("udp.port",  ASAP_UDP_PORT,  asap_handle);
 934   dissector_add_uint("tcp.port",  ASAP_TCP_PORT,  asap_handle);
 935   dissector_add_uint("sctp.port", ASAP_SCTP_PORT, asap_handle);
 936 }