epan/dissectors/packet-s5066sis.c

   1 /* packet-s5066sis.c
   2  * Routines to dissect STANAG 5066 Subnetwork Interface Sublayer (SIS)
   3  * packets, as described in Annex A of STANAG 5066.
   4  *
   5  * Copyright (c) 2005 by Menno Andriesse <s5066 [AT] nc3a.nato.int>
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1999 Gerald Combs
  10  *
  11  * SPDX-License-Identifier: GPL-2.0-or-later
  12  */
  13
  14 #include "config.h"
  15
  16 #include <epan/packet.h>
  17 #include <epan/prefs.h>
  18 #include "packet-tcp.h" /* For tcp_dissect_pdus() */
  19 #include "packet-s5066sis.h"
  20
  21
  22 /* SapIDs for RCOP/UDOP clients */
  23 # define SAPID_TMMHS    2
  24 # define SAPID_RCOP     6
  25 # define SAPID_UDOP     7
  26
  27 /* Forward reference */
  28 static dissector_handle_t s5066_tcp_handle;
  29 /* Register functions */
  30 void proto_register_s5066(void);
  31 void proto_reg_handoff_s5066(void);
  32 /* Main dissectors */
  33 static int dissect_s5066_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data);
  34 static unsigned get_s5066_pdu_len(packet_info *pinfo, tvbuff_t *tvb, int offset, void *data);
  35 static int dissect_s5066_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_);
  36 /* Client transport layer header dissector */
  37 static unsigned dissect_s5066_client_transport_header(tvbuff_t *tvb, unsigned offset, proto_tree *tree, uint8_t sapid, unsigned *client_app_id);
  38 /* Service type and address dissectors */
  39 static unsigned dissect_s5066_servicetype(tvbuff_t *tvb, unsigned offset, proto_tree *tree);
  40 static unsigned dissect_s5066_address(tvbuff_t *tvb, unsigned offset, proto_tree *tree, int source);
  41 /* S-Primitive dissectors */
  42 static unsigned dissect_s5066_01(tvbuff_t *tvb, unsigned offset, proto_tree *tree);
  43 /* static unsigned dissect_s5066_02(tvbuff_t *tvb, unsigned offset, proto_tree *tree); */
  44 static unsigned dissect_s5066_03(tvbuff_t *tvb, unsigned offset, proto_tree *tree);
  45 static unsigned dissect_s5066_04(tvbuff_t *tvb, unsigned offset, proto_tree *tree);
  46 static unsigned dissect_s5066_05(tvbuff_t *tvb, unsigned offset, proto_tree *tree);
  47 static unsigned dissect_s5066_06(tvbuff_t *tvb, unsigned offset, proto_tree *tree);
  48 static unsigned dissect_s5066_07(tvbuff_t *tvb, unsigned offset, proto_tree *tree);
  49 static unsigned dissect_s5066_08(tvbuff_t *tvb, unsigned offset, proto_tree *tree);
  50 static unsigned dissect_s5066_09(tvbuff_t *tvb, unsigned offset, proto_tree *tree);
  51 static unsigned dissect_s5066_10(tvbuff_t *tvb, unsigned offset, proto_tree *tree);
  52 static unsigned dissect_s5066_11(tvbuff_t *tvb, unsigned offset, proto_tree *tree);
  53 static unsigned dissect_s5066_12(tvbuff_t *tvb, unsigned offset, proto_tree *tree);
  54 static unsigned dissect_s5066_13(tvbuff_t *tvb, unsigned offset, proto_tree *tree);
  55 static unsigned dissect_s5066_14(tvbuff_t *tvb, unsigned offset, proto_tree *tree);
  56 /* static unsigned dissect_s5066_15(tvbuff_t *tvb, unsigned offset, proto_tree *tree); */
  57 /* static unsigned dissect_s5066_16(tvbuff_t *tvb, unsigned offset, proto_tree *tree); */
  58 /* static unsigned dissect_s5066_17(tvbuff_t *tvb, unsigned offset, proto_tree *tree); */
  59 static unsigned dissect_s5066_18(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned pdu_size);
  60 static unsigned dissect_s5066_19(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned pdu_size);
  61 static unsigned dissect_s5066_20(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned *client_app_id);
  62 static unsigned dissect_s5066_21(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned pdu_size, unsigned *client_app_id);
  63 static unsigned dissect_s5066_22(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned *client_app_id);
  64 static unsigned dissect_s5066_23(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned *client_app_id);
  65 static unsigned dissect_s5066_24(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned *client_app_id);
  66 static unsigned dissect_s5066_25(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned pdu_size, unsigned *client_app_id);
  67 static unsigned dissect_s5066_26(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned *client_app_id);
  68 static unsigned dissect_s5066_27(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned *client_app_id);
  69
  70 static int proto_s5066;
  71
  72 static dissector_table_t s5066sis_dissector_table;
  73
  74 /* Enable desegmentation of S5066 over TCP */
  75 static bool s5066_desegment = true;
  76 /* Dissect old 'edition 1' of STANAG 5066 (It lacks the 'version' field.) */
  77 static bool s5066_edition_one;
  78 /* This port is registered with IANA */
  79 #define S5066_PORT 5066
  80 /* Size of header outside 'size' field */
  81 static int s5066_header_size = 5;
  82 /* Offset of 'size' field */
  83 static int s5066_size_offset = 3;
  84
  85 /* Sync should be 0x90EB */
  86 static int hf_s5066_sync_word;
  87 /* Version should be 0x00 */
  88 static int hf_s5066_version;
  89 /* Total size of the PDU, excluding this size and previous fields */
  90 /* So total size is this + 5 bytes (s5066_header_size) */
  91 static int hf_s5066_size;
  92 /* Th type of PDU */
  93 static int hf_s5066_type;
  94 static const value_string s5066_pdu_type[] = {
  95         { 1, "S_BIND_REQUEST"},
  96         { 2, "S_UNBIND_REQUEST"},
  97         { 3, "S_BIND_ACCEPTED"},
  98         { 4, "S_BIND_REJECTED"},
  99         { 5, "S_UNBIND_INDICATION"},
 100         { 6, "S_HARD_LINK_ESTABLISH"},
 101         { 7, "S_HARD_LINK_TERMINATE"},
 102         { 8, "S_HARD_LINK_ESTABLISHED"},
 103         { 9, "S_HARD_LINK_REJECTED"},
 104         {10, "S_HARD_LINK_TERMINATED"},
 105         {11, "S_HARD_LINK_INDICATION"},
 106         {12, "S_HARD_LINK_ACCEPT"},
 107         {13, "S_HARD_LINK_REJECT"},
 108         {14, "S_SUBNET_AVAILABILITY"},
 109         {15, "S_DATAFLOW_ON"},
 110         {16, "S_DATAFLOW_OFF"},
 111         {17, "S_KEEP_ALIVE"},
 112         {18, "S_MANAGEMENT_MESSAGE_REQUEST"},
 113         {19, "S_MANAGEMENT_MESSAGE_INDICATION"},
 114         {20, "S_UNIDATA_REQUEST"},
 115         {21, "S_UNIDATA_INDICATION"},
 116         {22, "S_UNIDATA_REQUEST_CONFIRM"},
 117         {23, "S_UNIDATA_REQUEST_REJECTED"},
 118         {24, "S_EXPEDITED_UNIDATA_REQUEST"},
 119         {25, "S_EXPEDITED_UNIDATA_INDICATION"},
 120         {26, "S_EXPEDITED_UNIDATA_REQUEST_CONFIRM"},
 121         {27, "S_EXPEDITED_UNIDATA_REQUEST_REJECTED"},
 122         { 0, NULL },
 123 };
 124
 125 /* STANAG 5066 Address */
 126 /* Size is defined in nibbles (4 bits) */
 127 static int hf_s5066_ad_size;
 128 /* Group flag: 0 = false, 1 = true */
 129 static int hf_s5066_ad_group;
 130 /* The remainder of the 4 bytes form the address */
 131 static int hf_s5066_ad_address;
 132
 133 /* Service type */
 134 /* Transmission mode: */
 135 static int hf_s5066_st_txmode;
 136 static const value_string s5066_st_txmode[] = {
 137         { 0, "Ignore service type field"},
 138         { 1, "ARQ"},
 139         { 2, "Non-ARQ (Broadcast)"},
 140         { 3, "Non-ARQ (with errors)"},
 141         { 4, "Other non-ARQ types"},
 142         { 5, "Other non-ARQ types"},
 143         { 6, "Other non-ARQ types"},
 144         { 7, "Other non-ARQ types"},
 145         { 8, "Other non-ARQ types"},
 146         { 9, "Other non-ARQ types"},
 147         {10, "Other non-ARQ types"},
 148         {11, "Other non-ARQ types"},
 149         {12, "Other non-ARQ types"},
 150         {13, "Other non-ARQ types"},
 151         {14, "Other non-ARQ types"},
 152         {15, "Other non-ARQ types"},
 153         { 0, NULL },
 154 };
 155 /* Delivery confirmation: */
 156 static int hf_s5066_st_delivery_confirmation;
 157 static const value_string s5066_st_delivery_confirmation[] = {
 158         { 0, "No confirmation"},
 159         { 1, "Node delivery confirmation"},
 160         { 2, "Client delivery confirmation"},
 161         { 3, "-- Not defined --"},
 162         { 0, NULL },
 163 };
 164 /* Delivery order: */
 165 static int hf_s5066_st_delivery_order;
 166 static const value_string s5066_st_delivery_order[] = {
 167         { 0, "In-order delivery"},
 168         { 1, "As-they-arrive"},
 169         { 0, NULL },
 170 };
 171 /* Extended field present: (Never in the current version.) */
 172 static int hf_s5066_st_extended;
 173 static const value_string s5066_st_extended[] = {
 174         { 0, "No extended field"},
 175         { 1, "Extended field follows"},
 176         { 0, NULL },
 177 };
 178 /* Number of retransmissions when in Non-ARQ: */
 179 static int hf_s5066_st_retries;
 180
 181 /* Client transport layer header */
 182 static int hf_s5066_ctl_conn_id;
 183 static int hf_s5066_ctl_reserved;
 184 static int hf_s5066_ctl_updu_id;
 185 static int hf_s5066_ctl_updu_segment;
 186 static int hf_s5066_ctl_app_id;
 187 static const value_string s5066_client_application_ids[] = {
 188         { S5066_CLIENT_BFTP,                        "Basic File Transfer Protocol (BFTP) File Transfer Service"},
 189         { S5066_CLIENT_FRAP,                        "File-Receipt/Acknowledgement Protocol"},
 190         { S5066_CLIENT_FRAP_V2,                     "File-Receipt/Acknowledgement Protocol Version 2"},
 191         { S5066_CLIENT_S4406_ANNEX_E_TMI_1_P_MUL,   "STANAG 4406 ANNEX E: Acp 142 (TMI-1)"},
 192         { S5066_CLIENT_S4406_ANNEX_E_TMI_2,         "STANAG 4406 ANNEX E (TMI-2)"},
 193         { S5066_CLIENT_S4406_ANNEX_E_TMI_3,         "STANAG 4406 ANNEX E (TMI-3)"},
 194         { S5066_CLIENT_S4406_ANNEX_E_TMI_4_DMP,     "STANAG 4406 ANNEX E: DMP (TMI-4)"},
 195         { S5066_CLIENT_S4406_ANNEX_E_TMI_5_ACP_127, "STANAG 4406 ANNEX E: Acp 127 Access Unit (TMI-5)"},
 196         { 0, NULL },
 197 };
 198
 199 /* SAP ID Assignments from Table F-1 */
 200 static const value_string s5066_sapid_assignments[] = {
 201         { 0, "Subnet management client"},
 202         { 1, "Character-Oriented Serial Stream (COSS) Client"},
 203         { 2, "STANAG 4406 Annex E - Tactical Military Message Handling (T-MMHS) Client"},
 204         { 3, "HMTP (HF Mail Transfer Protocol)"},
 205         { 4, "HFPOP (HF Post-Office Protocol)"},
 206         { 5, "Operator orderwire (HFCHAT)"},
 207         { 6, "Reliable Connection-Oriented Protocol (RCOP) w/ Extended Client"},
 208         { 7, "Unreliable Datagram Oriented Protocol (UDOP) w/ Extended Client"},
 209         { 8, "ETHER client"},
 210         { 9, "IP client"},
 211         { 10, "RESERVED - for future assignment"},
 212         { 11, "RESERVED - for future assignment"},
 213         { 12, "Compressed File Transport Protocol (CFTP)"},
 214         { 13, "UNASSIGNED - available for arbitrary use"},
 215         { 14, "UNASSIGNED - available for arbitrary use"},
 216         { 15, "UNASSIGNED - available for arbitrary use"},
 217         { 0, NULL },
 218 };
 219
 220 /* Type  1: S_BIND_REQUEST */
 221 static int hf_s5066_01_sapid;
 222 static int hf_s5066_01_rank;
 223 static int hf_s5066_01_unused;
 224
 225 /* Type  2: S_UNBIND_REQUEST */
 226 /*   --- no subfields ---   */
 227
 228 /* Type  3: S_BIND_ACCEPTED */
 229 static int hf_s5066_03_sapid;
 230 static int hf_s5066_03_unused;
 231 static int hf_s5066_03_mtu;
 232
 233 /* Type  4: S_BIND_REJECTED */
 234 static int hf_s5066_04_reason;
 235 static const value_string s5066_04_reason[] = {
 236         { 0, "Unknown reason"},
 237         { 1, "Not enough resources"},
 238         { 2, "Invalid Sap ID"},
 239         { 3, "Sap ID already allocated"},
 240         { 4, "ARQ mode unsupportable during broadcast session"},
 241         { 0, NULL },
 242 };
 243
 244 /* Type  5: S_UNBIND_INDICATION */
 245 static int hf_s5066_05_reason;
 246 static const value_string s5066_05_reason[] = {
 247         { 0, "Unknown reason"},
 248         { 1, "Connection pre-empted by higher ranking client"},
 249         { 2, "Inactivity (failure to respond to 'Keep-alive')"},
 250         { 3, "Too many invalid primitives"},
 251         { 4, "Too many expedited data request primitives"},
 252         { 5, "ARQ mode unsupportable during broadcast session"},
 253         { 0, NULL },
 254 };
 255
 256 /* Hard links: hardlinktype value string array. */
 257 static const value_string s5066_hard_link_type[] = {
 258         { 0, "Link reservation"},
 259         { 1, "Partial Bandwidth reservation"},
 260         { 2, "Full Bandwidth reservation"},
 261         { 3, "--- undefined ---"},
 262         { 0, NULL },
 263 };
 264
 265 /* Type  6: S_HARD_LINK_ESTABLISH */
 266 static int hf_s5066_06_link_type;
 267 static int hf_s5066_06_link_priority;
 268 static int hf_s5066_06_sapid;
 269
 270 /* Type  7: S_HARD_LINK_TERMINATE */
 271 /* Only  remote node address */
 272
 273 /* Type  8: S_HARD_LINK_ESTABLISHED */
 274 static int hf_s5066_08_remote_status;
 275 static const value_string s5066_08_remote_status[] = {
 276         { 0, "ERROR"},
 277         { 1, "OK"},
 278         { 0, NULL },
 279 };
 280 static int hf_s5066_08_link_type;
 281 static int hf_s5066_08_link_priority;
 282 static int hf_s5066_08_sapid;
 283
 284 /* Type  9: S_HARD_LINK_REJECTED */
 285 static int hf_s5066_09_reason;
 286 static const value_string s5066_09_reason[] = {
 287         { 0, "--- undefined ---"},
 288         { 1, "Remote node busy"},
 289         { 2, "Higher priority link exists"},
 290         { 3, "Remote node not responding"},
 291         { 4, "Destination Sap ID not bound"},
 292         { 5, "Requested Type-0 link exists"},
 293         { 0, NULL },
 294 };
 295 static int hf_s5066_09_link_type;
 296 static int hf_s5066_09_link_priority;
 297 static int hf_s5066_09_sapid;
 298
 299 /* Type 10: S_HARD_LINK_TERMINATED */
 300 static int hf_s5066_10_reason;
 301 static const value_string s5066_10_reason[] = {
 302         { 0, "--- undefined ---"},
 303         { 1, "Link terminated by remote node"},
 304         { 2, "Higher priority link requested"},
 305         { 3, "Remote node not responding"},
 306         { 4, "Destination Sap ID not bound"},
 307         { 5, "Physical link broken"},
 308         { 0, NULL },
 309 };
 310 static int hf_s5066_10_link_type;
 311 static int hf_s5066_10_link_priority;
 312 static int hf_s5066_10_sapid;
 313
 314 /* Type 11: S_HARD_LINK_INDICATION */
 315 static int hf_s5066_11_remote_status;
 316 static const value_string s5066_11_remote_status[] = {
 317         { 0, "ERROR"},
 318         { 1, "OK"},
 319         { 0, NULL },
 320 };
 321 static int hf_s5066_11_link_type;
 322 static int hf_s5066_11_link_priority;
 323 static int hf_s5066_11_sapid;
 324
 325 /* Type 12: S_HARD_LINK_ACCEPT */
 326 static int hf_s5066_12_link_type;
 327 static int hf_s5066_12_link_priority;
 328 static int hf_s5066_12_sapid;
 329
 330 /* Type 13: S_HARD_LINK_REJECT */
 331 static int hf_s5066_13_reason;
 332 static const value_string s5066_13_reason[] = {
 333         { 0, "--- undefined ---"},
 334         { 0, NULL },
 335 };
 336 static int hf_s5066_13_link_type;
 337 static int hf_s5066_13_link_priority;
 338 static int hf_s5066_13_sapid;
 339
 340 /* Type 14: S_SUBNET_AVAILABILITY */
 341 static int hf_s5066_14_status;
 342 static const value_string s5066_14_status[] = {
 343         { 0, "Off"},
 344         { 1, "On"},
 345         { 2, "Receive only"},
 346         { 3, "Half-duplex"},
 347         { 4, "Full-duplex"},
 348         { 0, NULL },
 349 };
 350 static int hf_s5066_14_reason;
 351 static const value_string s5066_14_reason[] = {
 352         { 0, "Unknown reason"},
 353         { 1, "Local node in EMCON"},
 354         { 2, "Higher priority link requested"},
 355         { 0, NULL },
 356 };
 357
 358 /* Type 15: S_DATAFLOW_ON */
 359 /*   --- no subfields ---   */
 360
 361 /* Type 16: S_DATAFLOW_OFF */
 362 /*   --- no subfields ---   */
 363
 364 /* Type 17: S_KEEP_ALIVE */
 365 /*   --- no subfields ---   */
 366
 367 /* Type 18: S_MANAGEMENT_MESSAGE_REQUEST */
 368 static int hf_s5066_18_type;
 369 static int hf_s5066_18_body;
 370
 371 /* Type 19: S_MANAGEMENT_MESSAGE_INDICATION */
 372 static int hf_s5066_19_type;
 373 static int hf_s5066_19_body;
 374
 375 /* Type 20: S_UNIDATA_REQUEST */
 376 static int hf_s5066_20_priority;
 377 static int hf_s5066_20_sapid;
 378 static int hf_s5066_20_ttl;
 379 static int hf_s5066_20_size;
 380
 381 /* Type 21: S_UNIDATA_INDICATION */
 382 static int hf_s5066_21_priority;
 383 static int hf_s5066_21_dest_sapid;
 384 static int hf_s5066_21_tx_mode;
 385 static int hf_s5066_21_src_sapid;
 386 static int hf_s5066_21_size;
 387 static int hf_s5066_21_err_blocks;
 388 static int hf_s5066_21_err_ptr;
 389 static int hf_s5066_21_err_size;
 390 static int hf_s5066_21_nrx_blocks;
 391 static int hf_s5066_21_nrx_ptr;
 392 static int hf_s5066_21_nrx_size;
 393
 394
 395 /* Type 22: S_UNIDATA_REQUEST_CONFIRM */
 396 static int hf_s5066_22_unused;
 397 static int hf_s5066_22_sapid;
 398 static int hf_s5066_22_size;
 399 static int hf_s5066_22_data;
 400
 401 /* Type 23: S_UNIDATA_REQUEST_REJECTED */
 402 static int hf_s5066_23_reason;
 403 static const value_string s5066_23_reason[] = {
 404         { 0, "Unknown reason"},
 405         { 1, "Time-To-Live expired"},
 406         { 2, "Destination SapID not bound"},
 407         { 3, "Destination node not responding"},
 408         { 4, "U_PDU larger than MTU"},
 409         { 5, "Transmission Mode not specified"},
 410         { 0, NULL },
 411 };
 412 static int hf_s5066_23_sapid;
 413 static int hf_s5066_23_size;
 414 static int hf_s5066_23_data;
 415
 416 /* Type 24: S_EXPEDITED_UNIDATA_REQUEST */
 417 static int hf_s5066_24_unused;
 418 static int hf_s5066_24_sapid;
 419 static int hf_s5066_24_ttl;
 420 static int hf_s5066_24_size;
 421
 422 /* Type 25: S_EXPEDITED_UNIDATA_INDICATION */
 423 static int hf_s5066_25_unused;
 424 static int hf_s5066_25_dest_sapid;
 425 static int hf_s5066_25_tx_mode;
 426 static int hf_s5066_25_src_sapid;
 427 static int hf_s5066_25_size;
 428 static int hf_s5066_25_err_blocks;
 429 static int hf_s5066_25_err_ptr;
 430 static int hf_s5066_25_err_size;
 431 static int hf_s5066_25_nrx_blocks;
 432 static int hf_s5066_25_nrx_ptr;
 433 static int hf_s5066_25_nrx_size;
 434
 435 /* Type 26: S_EXPEDITED_UNIDATA_REQUEST_CONFIRM */
 436 static int hf_s5066_26_unused;
 437 static int hf_s5066_26_sapid;
 438 static int hf_s5066_26_size;
 439 static int hf_s5066_26_data;
 440
 441 /* Type 27: S_EXPEDITED_UNIDATA_REQUEST_REJECTED */
 442 static int hf_s5066_27_reason;
 443 static const value_string s5066_27_reason[] = {
 444         { 0, "Unknown reason"},
 445         { 1, "Time-To-Live expired"},
 446         { 2, "Destination SapID not bound"},
 447         { 3, "Destination node not responding"},
 448         { 4, "U_PDU larger than MTU"},
 449         { 5, "Transmission Mode not specified"},
 450         { 0, NULL },
 451 };
 452 static int hf_s5066_27_sapid;
 453 static int hf_s5066_27_size;
 454 static int hf_s5066_27_data;
 455
 456
 457 static int ett_s5066;
 458 static int ett_s5066_pdu;
 459 static int ett_s5066_servicetype;
 460 static int ett_s5066_client_transport_header;
 461 static int ett_s5066_address;
 462
 463 static unsigned
 464 dissect_s5066_address(tvbuff_t *tvb, unsigned offset, proto_tree *tree, int source)
 465 {
 466         proto_tree *s5066_tree_address;
 467         uint32_t addr;
 468
 469         if (source) {
 470                 s5066_tree_address = proto_tree_add_subtree(tree, tvb, offset, 4, ett_s5066_address, NULL, "Source Address");
 471         }
 472         else {
 473                 s5066_tree_address = proto_tree_add_subtree(tree, tvb, offset, 4, ett_s5066_address, NULL, "Destination Address");
 474         }
 475
 476         proto_tree_add_item(s5066_tree_address, hf_s5066_ad_size, tvb, offset, 1, ENC_BIG_ENDIAN);
 477         proto_tree_add_item(s5066_tree_address, hf_s5066_ad_group, tvb, offset, 1, ENC_BIG_ENDIAN);
 478         addr = tvb_get_ntohl(tvb, offset);
 479         addr = addr & 0x1FFFFFFF;
 480         proto_tree_add_ipv4(s5066_tree_address, hf_s5066_ad_address, tvb, offset, 4, g_htonl(addr));
 481
 482         return offset + 4;
 483 }
 484
 485 static unsigned
 486 dissect_s5066_servicetype(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 487 {
 488         proto_tree *s5066_tree_servicetype;
 489
 490         s5066_tree_servicetype = proto_tree_add_subtree(tree, tvb, offset, 2, ett_s5066_servicetype, NULL, "Service type");
 491
 492         proto_tree_add_item(s5066_tree_servicetype, hf_s5066_st_txmode, tvb, offset, 1, ENC_BIG_ENDIAN);
 493         proto_tree_add_item(s5066_tree_servicetype, hf_s5066_st_delivery_confirmation, tvb, offset, 1, ENC_BIG_ENDIAN);
 494         proto_tree_add_item(s5066_tree_servicetype, hf_s5066_st_delivery_order, tvb, offset, 1, ENC_BIG_ENDIAN);
 495         proto_tree_add_item(s5066_tree_servicetype, hf_s5066_st_extended, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 496         proto_tree_add_item(s5066_tree_servicetype, hf_s5066_st_retries, tvb, offset, 1, ENC_BIG_ENDIAN);
 497
 498         return offset;
 499 }
 500
 501 static unsigned
 502 dissect_s5066_client_transport_header(tvbuff_t *tvb, unsigned offset, proto_tree *tree, uint8_t sapid, unsigned *client_app_id)
 503 {
 504         proto_tree *s5066_tree_client_transport_header;
 505
 506         if (!((sapid == SAPID_TMMHS) || (sapid == SAPID_RCOP) || (sapid == SAPID_UDOP))) {
 507                 return offset;
 508         }
 509
 510         s5066_tree_client_transport_header = proto_tree_add_subtree(tree, tvb, offset, 6, ett_s5066_client_transport_header, NULL, "Client Transport Layer Header");
 511
 512         proto_tree_add_item(s5066_tree_client_transport_header, hf_s5066_ctl_conn_id, tvb, offset, 1, ENC_BIG_ENDIAN);
 513         proto_tree_add_item(s5066_tree_client_transport_header, hf_s5066_ctl_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
 514         offset++;
 515         proto_tree_add_item(s5066_tree_client_transport_header, hf_s5066_ctl_updu_id, tvb, offset, 1, ENC_BIG_ENDIAN);
 516         offset++;
 517         proto_tree_add_item(s5066_tree_client_transport_header, hf_s5066_ctl_updu_segment, tvb, offset, 2, ENC_BIG_ENDIAN);
 518         offset += 2;
 519         *client_app_id = tvb_get_ntohs(tvb, offset);
 520         proto_tree_add_item(s5066_tree_client_transport_header, hf_s5066_ctl_app_id, tvb, offset, 2, ENC_BIG_ENDIAN);
 521         offset += 2;
 522
 523         return offset;
 524 }
 525
 526 /* S_BIND_REQUEST */
 527 static unsigned
 528 dissect_s5066_01(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 529 {
 530         proto_tree_add_item(tree, hf_s5066_01_sapid, tvb, offset, 1, ENC_BIG_ENDIAN);
 531         proto_tree_add_item(tree, hf_s5066_01_rank, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 532
 533         offset = dissect_s5066_servicetype(tvb, offset, tree);
 534
 535         proto_tree_add_item(tree, hf_s5066_01_unused, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 536         return offset;
 537 }
 538
 539 /* S_UNBIND_REQUEST */
 540 /* Commented out: does nothing and causes <variable not used> messages.
 541 static unsigned
 542 dissect_s5066_02(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 543 {
 544         return offset;
 545 }
 546 */
 547
 548 /* S_BIND_ACCEPTED */
 549 static unsigned
 550 dissect_s5066_03(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 551 {
 552         proto_tree_add_item(tree, hf_s5066_03_sapid, tvb, offset, 1, ENC_BIG_ENDIAN);
 553         proto_tree_add_item(tree, hf_s5066_03_unused, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 554         proto_tree_add_item(tree, hf_s5066_03_mtu, tvb, offset, 2, ENC_BIG_ENDIAN); offset +=2;
 555         return offset;
 556 }
 557
 558 /* S_BIND_REJECTED */
 559 static unsigned
 560 dissect_s5066_04(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 561 {
 562         proto_tree_add_item(tree, hf_s5066_04_reason, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 563         return offset;
 564 }
 565
 566 /* S_UNBIND_INDICATION */
 567 static unsigned
 568 dissect_s5066_05(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 569 {
 570         proto_tree_add_item(tree, hf_s5066_05_reason, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 571         return offset;
 572 }
 573
 574 /* S_HARD_LINK_ESTABLISH */
 575 static unsigned
 576 dissect_s5066_06(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 577 {
 578         proto_tree_add_item(tree, hf_s5066_06_link_type, tvb, offset, 1, ENC_BIG_ENDIAN);
 579         proto_tree_add_item(tree, hf_s5066_06_link_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
 580         proto_tree_add_item(tree, hf_s5066_06_sapid, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 581         offset = dissect_s5066_address(tvb, offset, tree, false);
 582         return offset;
 583 }
 584
 585 /* S_HARD_LINK_TERMINATE */
 586 static unsigned
 587 dissect_s5066_07(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 588 {
 589         offset = dissect_s5066_address(tvb, offset, tree, false);
 590         return offset;
 591 }
 592
 593 /* S_HARD_LINK_ESTABLISHED */
 594 static unsigned
 595 dissect_s5066_08(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 596 {
 597         proto_tree_add_item(tree, hf_s5066_08_remote_status, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 598         proto_tree_add_item(tree, hf_s5066_08_link_type, tvb, offset, 1, ENC_BIG_ENDIAN);
 599         proto_tree_add_item(tree, hf_s5066_08_link_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
 600         proto_tree_add_item(tree, hf_s5066_08_sapid, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 601         offset = dissect_s5066_address(tvb, offset, tree, false);
 602         return offset;
 603 }
 604
 605 /* S_HARD_LINK_REJECTED */
 606 static unsigned
 607 dissect_s5066_09(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 608 {
 609         proto_tree_add_item(tree, hf_s5066_09_reason, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 610         proto_tree_add_item(tree, hf_s5066_09_link_type, tvb, offset, 1, ENC_BIG_ENDIAN);
 611         proto_tree_add_item(tree, hf_s5066_09_link_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
 612         proto_tree_add_item(tree, hf_s5066_09_sapid, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 613         offset = dissect_s5066_address(tvb, offset, tree, false);
 614         return offset;
 615 }
 616
 617 /* S_HARD_LINK_TERMINATED */
 618 static unsigned
 619 dissect_s5066_10(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 620 {
 621         proto_tree_add_item(tree, hf_s5066_10_reason, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 622         proto_tree_add_item(tree, hf_s5066_10_link_type, tvb, offset, 1, ENC_BIG_ENDIAN);
 623         proto_tree_add_item(tree, hf_s5066_10_link_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
 624         proto_tree_add_item(tree, hf_s5066_10_sapid, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 625         offset = dissect_s5066_address(tvb, offset, tree, false);
 626         return offset;
 627 }
 628
 629 /* S_HARD_LINK_INDICATION */
 630 static unsigned
 631 dissect_s5066_11(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 632 {
 633         proto_tree_add_item(tree, hf_s5066_11_remote_status, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 634         proto_tree_add_item(tree, hf_s5066_11_link_type, tvb, offset, 1, ENC_BIG_ENDIAN);
 635         proto_tree_add_item(tree, hf_s5066_11_link_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
 636         proto_tree_add_item(tree, hf_s5066_11_sapid, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 637         offset = dissect_s5066_address(tvb, offset, tree, false);
 638         return offset;
 639 }
 640
 641 /* S_HARD_LINK_ACCEPT */
 642 static unsigned
 643 dissect_s5066_12(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 644 {
 645         proto_tree_add_item(tree, hf_s5066_12_link_type, tvb, offset, 1, ENC_BIG_ENDIAN);
 646         proto_tree_add_item(tree, hf_s5066_12_link_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
 647         proto_tree_add_item(tree, hf_s5066_12_sapid, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 648         offset = dissect_s5066_address(tvb, offset, tree, false);
 649         return offset;
 650 }
 651
 652 /* S_HARD_LINK_REJECT */
 653 static unsigned
 654 dissect_s5066_13(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 655 {
 656         proto_tree_add_item(tree, hf_s5066_13_reason, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 657         proto_tree_add_item(tree, hf_s5066_13_link_type, tvb, offset, 1, ENC_BIG_ENDIAN);
 658         proto_tree_add_item(tree, hf_s5066_13_link_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
 659         proto_tree_add_item(tree, hf_s5066_13_sapid, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 660         offset = dissect_s5066_address(tvb, offset, tree, false);
 661         return offset;
 662 }
 663
 664 /* S_SUBNET_AVAILABILITY */
 665 static unsigned
 666 dissect_s5066_14(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 667 {
 668         proto_tree_add_item(tree, hf_s5066_14_status, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 669         proto_tree_add_item(tree, hf_s5066_14_reason, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 670         return offset;
 671 }
 672
 673 /* Following three commented out: do nothing and cause <variable not used> messages. */
 674 /* S_DATA_FLOW_ON */
 675 /*
 676 static unsigned
 677 dissect_s5066_15(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 678 {
 679         return offset;
 680 }
 681 */
 682
 683 /* S_DATA_FLOW_OFF */
 684 /*
 685 static unsigned
 686 dissect_s5066_16(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 687 {
 688         return offset;
 689 }
 690 */
 691
 692 /* S_KEEP_ALIVE */
 693 /*
 694 static unsigned
 695 dissect_s5066_17(tvbuff_t *tvb, unsigned offset, proto_tree *tree)
 696 {
 697         return offset;
 698 }
 699 */
 700
 701 /* S_MANAGEMENT_MESSAGE_REQUEST */
 702 static unsigned
 703 dissect_s5066_18(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned pdu_size)
 704 {
 705         unsigned body_size = 0;
 706         proto_tree_add_item(tree, hf_s5066_18_type, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 707         body_size = pdu_size - offset;
 708         proto_tree_add_item(tree, hf_s5066_18_body, tvb, offset, body_size, ENC_NA); offset += body_size;
 709         return offset;
 710 }
 711
 712 /* S_MANAGEMENT_MESSAGE_INDICATION */
 713 static unsigned
 714 dissect_s5066_19(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned pdu_size)
 715 {
 716         unsigned body_size = 0;
 717         proto_tree_add_item(tree, hf_s5066_19_type, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 718         body_size = pdu_size - offset;
 719         proto_tree_add_item(tree, hf_s5066_19_body, tvb, offset, body_size, ENC_NA); offset += body_size;
 720         return offset;
 721 }
 722
 723 /* S_UNIDATA_REQUEST */
 724 static unsigned
 725 dissect_s5066_20(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned *client_app_id)
 726 {
 727         uint8_t sapid;
 728         proto_tree_add_item(tree, hf_s5066_20_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
 729         sapid = tvb_get_uint8(tvb, offset) & 0x0F;
 730         proto_tree_add_item(tree, hf_s5066_20_sapid, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 731         offset = dissect_s5066_address(tvb, offset, tree, false);
 732         offset = dissect_s5066_servicetype(tvb, offset, tree);
 733         proto_tree_add_item(tree, hf_s5066_20_ttl, tvb, offset, 3, ENC_BIG_ENDIAN); offset += 3;
 734         proto_tree_add_item(tree, hf_s5066_20_size, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 735         offset = dissect_s5066_client_transport_header(tvb, offset, tree, sapid, client_app_id);
 736
 737         return offset;
 738 }
 739
 740 /* S_UNIDATA_INDICATION */
 741 static unsigned
 742 dissect_s5066_21(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned pdu_size, unsigned *client_app_id)
 743 {
 744         unsigned i=0;
 745         proto_item *ti = NULL;
 746         unsigned d_pdu_size = 0;
 747         uint8_t tx_mode = 0;
 748         uint16_t no_err_blocks = 0;
 749         uint16_t no_nrx_blocks = 0;
 750         bool non_arq_w_errors = false;
 751         unsigned sapid;
 752
 753         proto_tree_add_item(tree, hf_s5066_21_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
 754         sapid = tvb_get_uint8(tvb, offset) & 0x0F;
 755         proto_tree_add_item(tree, hf_s5066_21_dest_sapid, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 756         offset = dissect_s5066_address(tvb, offset, tree, false);
 757
 758         tx_mode = tvb_get_uint8(tvb, offset);
 759         tx_mode = (tx_mode & 0xF0) >> 4;
 760         if (tx_mode == 3) {
 761                 non_arq_w_errors = true;
 762         }
 763
 764         proto_tree_add_item(tree, hf_s5066_21_tx_mode, tvb, offset, 1, ENC_BIG_ENDIAN);
 765         proto_tree_add_item(tree, hf_s5066_21_src_sapid, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 766         offset = dissect_s5066_address(tvb, offset, tree, true);
 767
 768         d_pdu_size = tvb_get_ntohs(tvb, offset);
 769         proto_tree_add_item(tree, hf_s5066_21_size, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 770
 771         /* Handle RockwellCollins (<= v2.1) 4-byte offset */
 772         if ( (pdu_size - offset) == (d_pdu_size + 4) ) {
 773                 ti = proto_tree_add_item(tree, hf_s5066_21_err_blocks, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 774                 proto_item_append_text(ti, ", (Field should not be present. Rockwell Collins v2.1 or earlier.) ");
 775                 ti = proto_tree_add_item(tree, hf_s5066_21_nrx_blocks, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 776                 proto_item_append_text(ti, ", (Field should not be present. Rockwell Collins v2.1 or earlier.) ");
 777         }
 778         /* Handle Non-ARQ with errors */
 779         if ( non_arq_w_errors ) {
 780                 no_err_blocks = tvb_get_ntohs(tvb, offset);
 781                 proto_tree_add_item(tree, hf_s5066_21_err_blocks, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 782                 for (i=0; i<no_err_blocks; i++) {
 783                         proto_tree_add_item(tree, hf_s5066_21_err_ptr, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 784                         proto_tree_add_item(tree, hf_s5066_21_err_size, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 785                 }
 786                 no_nrx_blocks = tvb_get_ntohs(tvb, offset);
 787                 proto_tree_add_item(tree, hf_s5066_21_nrx_blocks, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 788                 for (i=0; i<no_nrx_blocks; i++) {
 789                         proto_tree_add_item(tree, hf_s5066_21_nrx_ptr, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 790                         proto_tree_add_item(tree, hf_s5066_21_nrx_size, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 791                 }
 792         }
 793         offset = dissect_s5066_client_transport_header(tvb, offset, tree, sapid, client_app_id);
 794         return offset;
 795 }
 796
 797 /* S_UNIDATA_REQUEST_CONFIRM */
 798 static unsigned
 799 dissect_s5066_22(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned *client_app_id)
 800 {
 801         unsigned pdu_size = 0;
 802         uint8_t sapid;
 803         proto_tree_add_item(tree, hf_s5066_22_unused, tvb, offset, 1, ENC_BIG_ENDIAN);
 804         sapid = tvb_get_uint8(tvb, offset) & 0x0F;
 805         proto_tree_add_item(tree, hf_s5066_22_sapid, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 806         offset = dissect_s5066_address(tvb, offset, tree, false);
 807         pdu_size = tvb_get_ntohs(tvb, offset);
 808         proto_tree_add_item(tree, hf_s5066_22_size, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 809         proto_tree_add_item(tree, hf_s5066_22_data, tvb, offset, pdu_size, ENC_NA); offset += pdu_size;
 810         offset = dissect_s5066_client_transport_header(tvb, offset, tree, sapid, client_app_id);
 811
 812         return offset;
 813 }
 814
 815 /* S_UNIDATA_REQUEST_REJECTED */
 816 static unsigned
 817 dissect_s5066_23(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned *client_app_id)
 818 {
 819         unsigned pdu_size = 0;
 820         uint8_t sapid;
 821         proto_tree_add_item(tree, hf_s5066_23_reason, tvb, offset, 1, ENC_BIG_ENDIAN);
 822         sapid = tvb_get_uint8(tvb, offset) & 0x0F;
 823         proto_tree_add_item(tree, hf_s5066_23_sapid, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 824         offset = dissect_s5066_address(tvb, offset, tree, false);
 825         pdu_size = tvb_get_ntohs(tvb, offset);
 826         proto_tree_add_item(tree, hf_s5066_23_size, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 827         proto_tree_add_item(tree, hf_s5066_23_data, tvb, offset, pdu_size, ENC_NA); offset += pdu_size;
 828         offset = dissect_s5066_client_transport_header(tvb, offset, tree, sapid, client_app_id);
 829
 830         return offset;
 831 }
 832
 833 /* S_EXPEDITED_UNIDATA_REQUEST */
 834 static unsigned
 835 dissect_s5066_24(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned *client_app_id)
 836 {
 837         uint8_t sapid;
 838         proto_tree_add_item(tree, hf_s5066_24_unused, tvb, offset, 1, ENC_BIG_ENDIAN);
 839         sapid = tvb_get_uint8(tvb, offset) & 0x0F;
 840         proto_tree_add_item(tree, hf_s5066_24_sapid, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 841         offset = dissect_s5066_address(tvb, offset, tree, false);
 842         offset = dissect_s5066_servicetype(tvb, offset, tree);
 843         proto_tree_add_item(tree, hf_s5066_24_ttl, tvb, offset, 3, ENC_BIG_ENDIAN); offset += 3;
 844         proto_tree_add_item(tree, hf_s5066_24_size, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 845         offset = dissect_s5066_client_transport_header(tvb, offset, tree, sapid, client_app_id);
 846
 847         return offset;
 848 }
 849
 850 /* S_EXPEDITED_UNIDATA_INDICATION */
 851 static unsigned
 852 dissect_s5066_25(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned pdu_size, unsigned *client_app_id)
 853 {
 854         unsigned i=0;
 855         proto_item *ti = NULL;
 856         unsigned d_pdu_size = 0;
 857         uint8_t tx_mode = 0;
 858         uint16_t no_err_blocks = 0;
 859         uint16_t no_nrx_blocks = 0;
 860         bool non_arq_w_errors = false;
 861         uint8_t sapid;
 862
 863         proto_tree_add_item(tree, hf_s5066_25_unused, tvb, offset, 1, ENC_BIG_ENDIAN);
 864         sapid = tvb_get_uint8(tvb, offset) & 0x0F;
 865         proto_tree_add_item(tree, hf_s5066_25_dest_sapid, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 866         offset = dissect_s5066_address(tvb, offset, tree, false);
 867
 868         tx_mode = tvb_get_uint8(tvb, offset);
 869         tx_mode = (tx_mode & 0xF0) >> 4;
 870         if (tx_mode == 3) {
 871                 non_arq_w_errors = true;
 872         }
 873
 874         proto_tree_add_item(tree, hf_s5066_25_tx_mode, tvb, offset, 1, ENC_BIG_ENDIAN);
 875         proto_tree_add_item(tree, hf_s5066_25_src_sapid, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 876         offset = dissect_s5066_address(tvb, offset, tree, true);
 877
 878         d_pdu_size = tvb_get_ntohs(tvb, offset);
 879         proto_tree_add_item(tree, hf_s5066_25_size, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 880
 881         /* Handle RockwellCollins (<= v2.1) 4-byte offset */
 882         if ( (pdu_size - offset) == (d_pdu_size + 4) ) {
 883                 ti = proto_tree_add_item(tree, hf_s5066_25_err_blocks, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 884                 proto_item_append_text(ti, ", (Field should not be present. Rockwell Collins v2.1 or earlier.) ");
 885                 ti = proto_tree_add_item(tree, hf_s5066_25_nrx_blocks, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 886                 proto_item_append_text(ti, ", (Field should not be present. Rockwell Collins v2.1 or earlier.) ");
 887         }
 888         /* Handle Non-ARQ with errors */
 889         if ( non_arq_w_errors ) {
 890                 no_err_blocks = tvb_get_ntohs(tvb, offset);
 891                 proto_tree_add_item(tree, hf_s5066_25_err_blocks, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 892                 for (i=0; i<no_err_blocks; i++) {
 893                         proto_tree_add_item(tree, hf_s5066_25_err_ptr, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 894                         proto_tree_add_item(tree, hf_s5066_25_err_size, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 895                 }
 896                 no_nrx_blocks = tvb_get_ntohs(tvb, offset);
 897                 proto_tree_add_item(tree, hf_s5066_25_nrx_blocks, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 898                 for (i=0; i<no_nrx_blocks; i++) {
 899                         proto_tree_add_item(tree, hf_s5066_25_nrx_ptr, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 900                         proto_tree_add_item(tree, hf_s5066_25_nrx_size, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 901                 }
 902         }
 903         offset = dissect_s5066_client_transport_header(tvb, offset, tree, sapid, client_app_id);
 904         return offset;
 905 }
 906
 907 /* S_EXPEDITED_UNIDATA_REQUEST_CONFIRM */
 908 static unsigned
 909 dissect_s5066_26(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned *client_app_id)
 910 {
 911         unsigned pdu_size = 0;
 912         uint8_t sapid;
 913         proto_tree_add_item(tree, hf_s5066_26_unused, tvb, offset, 1, ENC_BIG_ENDIAN);
 914         sapid = tvb_get_uint8(tvb, offset) & 0x0F;
 915         proto_tree_add_item(tree, hf_s5066_26_sapid, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 916         offset = dissect_s5066_address(tvb, offset, tree, false);
 917         pdu_size = tvb_get_ntohs(tvb, offset);
 918         proto_tree_add_item(tree, hf_s5066_26_size, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 919         proto_tree_add_item(tree, hf_s5066_26_data, tvb, offset, pdu_size, ENC_NA); offset += pdu_size;
 920         offset = dissect_s5066_client_transport_header(tvb, offset, tree, sapid, client_app_id);
 921
 922         return offset;
 923 }
 924
 925 /* S_EXPEDITED_UNIDATA_REQUEST_REJECTED */
 926 static unsigned
 927 dissect_s5066_27(tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned *client_app_id)
 928 {
 929         unsigned pdu_size = 0;
 930         uint8_t sapid;
 931         proto_tree_add_item(tree, hf_s5066_27_reason, tvb, offset, 1, ENC_BIG_ENDIAN);
 932         sapid = tvb_get_uint8(tvb, offset) & 0x0F;
 933         proto_tree_add_item(tree, hf_s5066_27_sapid, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
 934         offset = dissect_s5066_address(tvb, offset, tree, false);
 935         pdu_size = tvb_get_ntohs(tvb, offset);
 936         proto_tree_add_item(tree, hf_s5066_27_size, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
 937         proto_tree_add_item(tree, hf_s5066_27_data, tvb, offset, pdu_size, ENC_NA); offset += pdu_size;
 938         offset = dissect_s5066_client_transport_header(tvb, offset, tree, sapid, client_app_id);
 939
 940         return offset;
 941 }
 942
 943 static unsigned
 944 get_s5066_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset, void *data _U_)
 945 {
 946         uint16_t plen;
 947
 948         /* Get the length of the S5066 PDU. */
 949         plen = tvb_get_ntohs(tvb, offset + s5066_size_offset);
 950
 951         /* That length doesn't include the sync, version and length fields; add that in. */
 952         return plen + s5066_header_size;
 953 }
 954
 955 static int
 956 dissect_s5066_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
 957 {
 958         /* Make sure there are enough bytes... */
 959         if (tvb_captured_length(tvb) < 5)
 960                 return 0;
 961         /* Check if the first two bytes are 0x90 0xEB: if not,
 962            then this is not a S5066 PDU or an unreassembled one.
 963            The third byte is the STANAG 5066 version: Right now only 0x00 is defined. */
 964         if( (tvb_get_uint8(tvb, 0) != 0x90) ||
 965             (tvb_get_uint8(tvb, 1) != 0xEB) ||
 966             (tvb_get_uint8(tvb, 2) != 0x00) ) {
 967                 return 0;
 968         }
 969         tcp_dissect_pdus(tvb, pinfo, tree, s5066_desegment, s5066_header_size, get_s5066_pdu_len, dissect_s5066_common, data);
 970         return tvb_captured_length(tvb);
 971 }
 972
 973 static int
 974 dissect_s5066_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
 975 {
 976         unsigned offset = 0;
 977         unsigned pdu_size = 0;
 978         proto_item *ti_s5066 = NULL;
 979         proto_item *ti_pdu = NULL;
 980         tvbuff_t *next_tvb;
 981         int available_length = 0;
 982         int reported_length = 0;
 983         int client_app_id = 0;
 984         proto_tree *s5066_tree = NULL;
 985         proto_tree *s5066_tree_pdu = NULL;
 986
 987         /* Determine PDU type to display in INFO column */
 988         uint8_t pdu_type = tvb_get_uint8(tvb, s5066_header_size);
 989
 990         col_set_str(pinfo->cinfo, COL_PROTOCOL, "S5066");
 991         /* Clear out stuff in the info column, the add PDU type */
 992         col_add_fstr(pinfo->cinfo, COL_INFO, "PDU type %s", val_to_str(pdu_type, s5066_pdu_type, "Unknown (0x%02x)"));
 993
 994         pdu_size = tvb_get_ntohs(tvb, s5066_size_offset) + s5066_header_size;
 995
 996         ti_s5066 = proto_tree_add_item(tree, proto_s5066, tvb, 0, -1, ENC_NA);
 997         proto_item_append_text(ti_s5066, ", PDU type %s", val_to_str(pdu_type, s5066_pdu_type, "Unknown (0x%02x)"));
 998         s5066_tree = proto_item_add_subtree(ti_s5066, ett_s5066);
 999         proto_tree_add_item(s5066_tree, hf_s5066_sync_word, tvb, offset, 2, ENC_BIG_ENDIAN); offset +=2;
1000         if (!s5066_edition_one) {
1001                 proto_tree_add_item(s5066_tree, hf_s5066_version,   tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
1002         }
1003         proto_tree_add_item(s5066_tree, hf_s5066_size,      tvb, offset, 2, ENC_BIG_ENDIAN); offset +=2;
1004         ti_pdu = proto_tree_add_item(s5066_tree, hf_s5066_type, tvb, offset, 1, ENC_BIG_ENDIAN); offset++;
1005         s5066_tree_pdu = proto_item_add_subtree(ti_pdu, ett_s5066_pdu);
1006         switch (pdu_type) {
1007         case  1: offset = dissect_s5066_01(tvb, offset, s5066_tree_pdu); break;
1008         /* case  2: offset = dissect_s5066_02(tvb, offset, s5066_tree_pdu); break; */
1009         case  3: offset = dissect_s5066_03(tvb, offset, s5066_tree_pdu); break;
1010         case  4: offset = dissect_s5066_04(tvb, offset, s5066_tree_pdu); break;
1011         case  5: offset = dissect_s5066_05(tvb, offset, s5066_tree_pdu); break;
1012         case  6: offset = dissect_s5066_06(tvb, offset, s5066_tree_pdu); break;
1013         case  7: offset = dissect_s5066_07(tvb, offset, s5066_tree_pdu); break;
1014         case  8: offset = dissect_s5066_08(tvb, offset, s5066_tree_pdu); break;
1015         case  9: offset = dissect_s5066_09(tvb, offset, s5066_tree_pdu); break;
1016         case 10: offset = dissect_s5066_10(tvb, offset, s5066_tree_pdu); break;
1017         case 11: offset = dissect_s5066_11(tvb, offset, s5066_tree_pdu); break;
1018         case 12: offset = dissect_s5066_12(tvb, offset, s5066_tree_pdu); break;
1019         case 13: offset = dissect_s5066_13(tvb, offset, s5066_tree_pdu); break;
1020         case 14: offset = dissect_s5066_14(tvb, offset, s5066_tree_pdu); break;
1021         /* case 15: offset = dissect_s5066_15(tvb, offset, s5066_tree_pdu); break; */
1022         /* case 16: offset = dissect_s5066_16(tvb, offset, s5066_tree_pdu); break; */
1023         /* case 17: offset = dissect_s5066_17(tvb, offset, s5066_tree_pdu); break; */
1024         case 18: offset = dissect_s5066_18(tvb, offset, s5066_tree_pdu, pdu_size); break;
1025         case 19: offset = dissect_s5066_19(tvb, offset, s5066_tree_pdu, pdu_size); break;
1026         case 20: offset = dissect_s5066_20(tvb, offset, s5066_tree_pdu, &client_app_id); break;
1027         case 21: offset = dissect_s5066_21(tvb, offset, s5066_tree_pdu, pdu_size, &client_app_id); break;
1028         case 22: offset = dissect_s5066_22(tvb, offset, s5066_tree_pdu, &client_app_id); break;
1029         case 23: offset = dissect_s5066_23(tvb, offset, s5066_tree_pdu, &client_app_id); break;
1030         case 24: offset = dissect_s5066_24(tvb, offset, s5066_tree_pdu, &client_app_id); break;
1031         case 25: offset = dissect_s5066_25(tvb, offset, s5066_tree_pdu, pdu_size, &client_app_id); break;
1032         case 26: offset = dissect_s5066_26(tvb, offset, s5066_tree_pdu, &client_app_id); break;
1033         case 27: offset = dissect_s5066_27(tvb, offset, s5066_tree_pdu, &client_app_id); break;
1034         }
1035         proto_item_set_len(ti_s5066, offset);
1036
1037         /* Call sub dissector(s) */
1038         reported_length = pdu_size - offset;
1039         available_length = tvb_captured_length(tvb) - offset;
1040
1041         next_tvb = tvb_new_subset_length_caplen(tvb, offset, MIN(available_length, reported_length), reported_length);
1042
1043         if(dissector_try_uint(s5066sis_dissector_table, client_app_id, next_tvb, pinfo, tree) == 0) {
1044                 call_data_dissector(next_tvb, pinfo, tree);
1045         }
1046
1047         return tvb_captured_length(tvb);
1048 }
1049
1050 void
1051 proto_register_s5066(void)
1052 {
1053         static hf_register_info hf[] = {
1054                 { &hf_s5066_sync_word,
1055                         { "Sync preamble", "s5066sis.sync", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }
1056                 },
1057                 { &hf_s5066_version,
1058                         { "S5066 version", "s5066sis.version", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }
1059                 },
1060                 { &hf_s5066_size,
1061                         { "S_Primitive size", "s5066sis.size", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1062                 },
1063                 { &hf_s5066_type,
1064                         { "PDU Type", "s5066sis.type", FT_UINT8, BASE_DEC, VALS(s5066_pdu_type), 0x0, NULL, HFILL }
1065                 },
1066                 /* STANAG 5066 Address */
1067                 { &hf_s5066_ad_size,
1068                         { "Address size (1/2 Bytes)", "s5066sis.address.size", FT_UINT8, BASE_HEX, NULL, 0xE0, NULL, HFILL }
1069                 },
1070                 { &hf_s5066_ad_group,
1071                         { "Group address", "s5066sis.address.group", FT_UINT8, BASE_HEX, NULL, 0x10, NULL, HFILL }
1072                 },
1073                 { &hf_s5066_ad_address,
1074                         { "Address", "s5066sis.address.address", FT_IPv4, BASE_NONE, NULL, 0, NULL, HFILL }
1075                 },
1076                 /* Service type */
1077                 { &hf_s5066_st_txmode,
1078                         { "Transmission mode", "s5066sis.st.txmode", FT_UINT8, BASE_HEX, VALS(s5066_st_txmode), 0xF0, NULL, HFILL }
1079                 },
1080                 { &hf_s5066_st_delivery_confirmation,
1081                         { "Delivery confirmation", "s5066sis.st.confirm", FT_UINT8, BASE_HEX, VALS(s5066_st_delivery_confirmation),  0x0C, NULL, HFILL }
1082                 },
1083                 { &hf_s5066_st_delivery_order,
1084                         { "Delivery order", "s5066sis.st.order", FT_UINT8, BASE_HEX, VALS(s5066_st_delivery_order), 0x02, NULL, HFILL }
1085                 },
1086                 { &hf_s5066_st_extended,
1087                         { "Extended field", "s5066sis.st.extended", FT_UINT8, BASE_HEX, VALS(s5066_st_extended), 0x01, NULL, HFILL }
1088                 },
1089                 { &hf_s5066_st_retries,
1090                         { "Minimum number of retransmissions", "s5066sis.st.retries", FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL }
1091                 },
1092                 /* Client transport layer header */
1093                 { &hf_s5066_ctl_conn_id,
1094                         { "Connection ID number", "s5066sis.ctl.conn_id", FT_UINT8, BASE_HEX, NULL, 0xF0, NULL, HFILL }
1095                 },
1096                 { &hf_s5066_ctl_reserved,
1097                         { "Reserved", "s5066sis.ctl.reserved", FT_UINT8, BASE_HEX, NULL, 0x0F, NULL, HFILL }
1098                 },
1099                 { &hf_s5066_ctl_updu_id,
1100                         { "UPDU ID number", "s5066sis.ctl.updu_id", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }
1101                 },
1102                 { &hf_s5066_ctl_updu_segment,
1103                         { "UPDU segment number", "s5066sis.ctl.updu_segment", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }
1104                 },
1105                 { &hf_s5066_ctl_app_id,
1106                         { "Application identifier", "s5066sis.ctl.app_id", FT_UINT16, BASE_HEX, VALS(s5066_client_application_ids), 0x0, NULL, HFILL }
1107                 },
1108                 /* PDU Type 01: S_BIND_REQUEST */
1109                 { &hf_s5066_01_sapid,
1110                         { "Sap ID", "s5066sis.01.sapid", FT_UINT8, BASE_DEC, VALS(s5066_sapid_assignments), 0xF0, NULL, HFILL }
1111                 },
1112                 { &hf_s5066_01_rank,
1113                         { "Rank", "s5066sis.01.rank", FT_UINT8, BASE_DEC, NULL, 0x0F, NULL, HFILL }
1114                 },
1115                 { &hf_s5066_01_unused,
1116                         { "(Unused)", "s5066sis.01.unused", FT_UINT8, BASE_HEX, NULL, 0x0F, NULL, HFILL }
1117                 },
1118                 /* PDU Type 02: S_UNBIND_REQUEST */
1119                 /*     --- no subfields ---     */
1120                 /* PDU Type 03: S_BIND_ACCEPTED */
1121                 { &hf_s5066_03_sapid,
1122                         { "Sap ID", "s5066sis.03.sapid", FT_UINT8, BASE_DEC, VALS(s5066_sapid_assignments), 0xF0, NULL, HFILL }
1123                 },
1124                 { &hf_s5066_03_unused,
1125                         { "(Unused)", "s5066sis.03.unused", FT_UINT8, BASE_HEX, NULL, 0x0F, NULL, HFILL }
1126                 },
1127                 { &hf_s5066_03_mtu,
1128                         { "MTU", "s5066sis.03.mtu", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1129                 },
1130                 /* PDU Type 04: S_BIND_REJECTED */
1131                 { &hf_s5066_04_reason,
1132                         { "Reason", "s5066sis.04.reason", FT_UINT8, BASE_DEC, VALS(s5066_04_reason), 0x0, NULL, HFILL }
1133                 },
1134                 /* PDU Type 05: S_UNBIND_INDICATION */
1135                 { &hf_s5066_05_reason,
1136                         { "Reason", "s5066sis.05.reason", FT_UINT8, BASE_DEC, VALS(s5066_05_reason), 0x0, NULL, HFILL }
1137                 },
1138                 /* Type  6: S_HARD_LINK_ESTABLISH */
1139                 { &hf_s5066_06_link_type,
1140                         { "Hardlink type", "s5066sis.06.type", FT_UINT8, BASE_DEC, VALS(s5066_hard_link_type), 0xC0, NULL, HFILL }
1141                 },
1142                 { &hf_s5066_06_link_priority,
1143                         { "Priority", "s5066sis.06.priority", FT_UINT8, BASE_DEC, NULL, 0x30, NULL, HFILL }
1144                 },
1145                 { &hf_s5066_06_sapid,
1146                         { "Remote Sap ID", "s5066sis.06.sapid", FT_UINT8, BASE_DEC, VALS(s5066_sapid_assignments), 0x0F, NULL, HFILL }
1147                 },
1148                 /* Type  7: S_HARD_LINK_TERMINATE */
1149                 /* --- Only remote node address --- */
1150                 /* Type  8: S_HARD_LINK_ESTABLISHED */
1151                 { &hf_s5066_08_remote_status,
1152                         { "Remote node status", "s5066sis.08.status", FT_UINT8, BASE_DEC, VALS(s5066_08_remote_status), 0x0, NULL, HFILL }
1153                 },
1154                 { &hf_s5066_08_link_type,
1155                         { "Hardlink type", "s5066sis.08.type", FT_UINT8, BASE_DEC, VALS(s5066_hard_link_type), 0xC0, NULL, HFILL }
1156                 },
1157                 { &hf_s5066_08_link_priority,
1158                         { "Priority", "s5066sis.08.priority", FT_UINT8, BASE_DEC, NULL, 0x30, NULL, HFILL }
1159                 },
1160                 { &hf_s5066_08_sapid,
1161                         { "Remote Sap ID", "s5066sis.08.sapid", FT_UINT8, BASE_DEC, VALS(s5066_sapid_assignments), 0x0F, NULL, HFILL }
1162                 },
1163                 /* Type  9: S_HARD_LINK_REJECTED */
1164                 { &hf_s5066_09_reason,
1165                         { "Reason", "s5066sis.09.reason", FT_UINT8, BASE_DEC, VALS(s5066_09_reason), 0x0, NULL, HFILL }
1166                 },
1167                 { &hf_s5066_09_link_type,
1168                         { "Hardlink type", "s5066sis.09.type", FT_UINT8, BASE_DEC, VALS(s5066_hard_link_type), 0xC0, NULL, HFILL }
1169                 },
1170                 { &hf_s5066_09_link_priority,
1171                         { "Priority", "s5066sis.09.priority", FT_UINT8, BASE_DEC, NULL, 0x30, NULL, HFILL }
1172                 },
1173                 { &hf_s5066_09_sapid,
1174                         { "Remote Sap ID", "s5066sis.09.sapid", FT_UINT8, BASE_DEC, VALS(s5066_sapid_assignments), 0x0F, NULL, HFILL }
1175                 },
1176                 /* Type 10: S_HARD_LINK_TERMINATED */
1177                 { &hf_s5066_10_reason,
1178                         { "Reason", "s5066sis.10.reason", FT_UINT8, BASE_DEC, VALS(s5066_10_reason), 0x0, NULL, HFILL }
1179                 },
1180                 { &hf_s5066_10_link_type,
1181                         { "Hardlink type", "s5066sis.10.type", FT_UINT8, BASE_DEC, VALS(s5066_hard_link_type), 0xC0, NULL, HFILL }
1182                 },
1183                 { &hf_s5066_10_link_priority,
1184                         { "Priority", "s5066sis.10.priority", FT_UINT8, BASE_DEC, NULL, 0x30, NULL, HFILL }
1185                 },
1186                 { &hf_s5066_10_sapid,
1187                         { "Remote Sap ID", "s5066sis.10.sapid", FT_UINT8, BASE_DEC, VALS(s5066_sapid_assignments), 0x0F, NULL, HFILL }
1188                 },
1189                 /* Type 11: S_HARD_LINK_INDICATION */
1190                 { &hf_s5066_11_remote_status,
1191                         { "Remote node status", "s5066sis.11.status", FT_UINT8, BASE_DEC, VALS(s5066_11_remote_status), 0x0, NULL, HFILL }
1192                 },
1193                 { &hf_s5066_11_link_type,
1194                         { "Hardlink type", "s5066sis.11.type", FT_UINT8, BASE_DEC, VALS(s5066_hard_link_type), 0xC0, NULL, HFILL }
1195                 },
1196                 { &hf_s5066_11_link_priority,
1197                         { "Priority", "s5066sis.11.priority", FT_UINT8, BASE_DEC, NULL, 0x30, NULL, HFILL }
1198                 },
1199                 { &hf_s5066_11_sapid,
1200                         { "Remote Sap ID", "s5066sis.11.sapid", FT_UINT8, BASE_DEC, VALS(s5066_sapid_assignments), 0x0F, NULL, HFILL }
1201                 },
1202                 /* Type 12: S_HARD_LINK_ACCEPT */
1203                 { &hf_s5066_12_link_type,
1204                         { "Hardlink type", "s5066sis.12.type", FT_UINT8, BASE_DEC, VALS(s5066_hard_link_type), 0xC0, NULL, HFILL }
1205                 },
1206                 { &hf_s5066_12_link_priority,
1207                         { "Priority", "s5066sis.12.priority", FT_UINT8, BASE_DEC, NULL, 0x30, NULL, HFILL }
1208                 },
1209                 { &hf_s5066_12_sapid,
1210                         { "Remote Sap ID", "s5066sis.12.sapid", FT_UINT8, BASE_DEC, VALS(s5066_sapid_assignments), 0x0F, NULL, HFILL }
1211                 },
1212                 /* Type 13: S_HARD_LINK_REJECT */
1213                 { &hf_s5066_13_reason,
1214                         { "Reason", "s5066sis.13.reason", FT_UINT8, BASE_DEC, VALS(s5066_13_reason), 0x0, NULL, HFILL }
1215                 },
1216                 { &hf_s5066_13_link_type,
1217                         { "Hardlink type", "s5066sis.13.type", FT_UINT8, BASE_DEC, VALS(s5066_hard_link_type), 0xC0, NULL, HFILL }
1218                 },
1219                 { &hf_s5066_13_link_priority,
1220                         { "Priority", "s5066sis.13.priority", FT_UINT8, BASE_DEC, NULL, 0x30, NULL, HFILL }
1221                 },
1222                 { &hf_s5066_13_sapid,
1223                         { "Remote Sap ID", "s5066sis.13.sapid", FT_UINT8, BASE_DEC, VALS(s5066_sapid_assignments), 0x0F, NULL, HFILL }
1224                 },
1225                 /* Type 14: S_SUBNET_AVAILABILITY */
1226                 { &hf_s5066_14_status,
1227                         { "Status", "s5066sis.14.status", FT_UINT8, BASE_DEC, VALS(s5066_14_status), 0x0, NULL, HFILL }
1228                 },
1229                 { &hf_s5066_14_reason,
1230                         { "Reason", "s5066sis.14.reason", FT_UINT8, BASE_DEC, VALS(s5066_14_reason), 0x0, NULL, HFILL }
1231                 },
1232                 /* Type 15: S_DATAFLOW_ON */
1233                 /*   --- no subfields ---   */
1234                 /* Type 16: S_DATAFLOW_OFF */
1235                 /*   --- no subfields ---   */
1236                 /* Type 17: S_KEEP_ALIVE */
1237                 /*   --- no subfields ---   */
1238                 /* Type 18: S_MANAGEMENT_MESSAGE_REQUEST */
1239                 { &hf_s5066_18_type,
1240                         { "Message Type", "s5066sis.18.type", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }
1241                 },
1242                 { &hf_s5066_18_body,
1243                         { "Message Body", "s5066sis.18.body", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
1244                 },
1245                 /* Type 19: S_MANAGEMENT_MESSAGE_INDICATION */
1246                 { &hf_s5066_19_type,
1247                         { "Message Type", "s5066sis.19.type", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }
1248                 },
1249                 { &hf_s5066_19_body,
1250                         { "Message Body", "s5066sis.19.body", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
1251                 },
1252                 /* Type 20: S_UNIDATA_REQUEST */
1253                 { &hf_s5066_20_priority,
1254                         { "Priority", "s5066sis.20.priority", FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL }
1255                 },
1256                 { &hf_s5066_20_sapid,
1257                         { "Destination Sap ID", "s5066sis.20.sapid", FT_UINT8, BASE_DEC, VALS(s5066_sapid_assignments), 0x0F, NULL, HFILL }
1258                 },
1259                 { &hf_s5066_20_ttl,
1260                         { "Time-To-Live (x2 seconds)", "s5066sis.20.ttl", FT_UINT24, BASE_DEC, NULL, 0x0FFFFF, NULL, HFILL }
1261                 },
1262                 { &hf_s5066_20_size,
1263                         { "U_PDU Size", "s5066sis.20.size", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1264                 },
1265                 /* Type 21: S_UNIDATA_INDICATION */
1266                 { &hf_s5066_21_priority,
1267                         { "Priority", "s5066sis.21.priority", FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL }
1268                 },
1269                 { &hf_s5066_21_dest_sapid,
1270                         { "Destination Sap ID", "s5066sis.21.sapid", FT_UINT8, BASE_DEC, VALS(s5066_sapid_assignments), 0x0F, NULL, HFILL }
1271                 },
1272                 { &hf_s5066_21_tx_mode,
1273                         { "Transmission Mode", "s5066sis.21.txmode", FT_UINT8, BASE_HEX, VALS(s5066_st_txmode), 0xF0, NULL, HFILL }
1274                 },
1275                 { &hf_s5066_21_src_sapid,
1276                         { "Source Sap ID", "s5066sis.21.src_sapid", FT_UINT8, BASE_DEC, NULL, 0x0F, NULL, HFILL }
1277                 },
1278                 { &hf_s5066_21_size,
1279                         { "U_PDU Size", "s5066sis.21.size", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1280                 },
1281                 { &hf_s5066_21_err_blocks,
1282                         { "Number of errored blocks", "s5066sis.21.err_blocks", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1283                 },
1284                 { &hf_s5066_21_err_ptr,
1285                         { "Pointer to error block", "s5066sis.21.err_ptr", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }
1286                 },
1287                 { &hf_s5066_21_err_size,
1288                         { "Size of error block", "s5066sis.21.err_size", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1289                 },
1290                 { &hf_s5066_21_nrx_blocks,
1291                         { "Number of non-received blocks", "s5066sis.21.nrx_blocks", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1292                 },
1293                 { &hf_s5066_21_nrx_ptr,
1294                         { "Pointer to non-received block", "s5066sis.21.nrx_ptr", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }
1295                 },
1296                 { &hf_s5066_21_nrx_size,
1297                         { "Size of non-received block", "s5066sis.21.nrx_size", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1298                 },
1299                 /* Type 22: S_UNIDATA_REQUEST_CONFIRM */
1300                 { &hf_s5066_22_unused,
1301                         { "(Unused)", "s5066sis.22.unused", FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL }
1302                 },
1303                 { &hf_s5066_22_sapid,
1304                         { "Destination Sap ID", "s5066sis.22.sapid", FT_UINT8, BASE_DEC, VALS(s5066_sapid_assignments), 0x0F, NULL, HFILL }
1305                 },
1306                 { &hf_s5066_22_size,
1307                         { "U_PDU Size", "s5066sis.22.size", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1308                 },
1309                 { &hf_s5066_22_data,
1310                         { "(Part of) Confirmed data", "s5066sis.22.data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
1311                 },
1312                 /* Type 23: S_UNIDATA_REQUEST_REJECTED */
1313                 { &hf_s5066_23_reason,
1314                         { "Reason", "s5066sis.23.reason", FT_UINT8, BASE_DEC, VALS(s5066_23_reason), 0xF0, NULL, HFILL }
1315                 },
1316                 { &hf_s5066_23_sapid,
1317                         { "Destination Sap ID", "s5066sis.23.sapid", FT_UINT8, BASE_DEC, VALS(s5066_sapid_assignments), 0x0F, NULL, HFILL }
1318                 },
1319                 { &hf_s5066_23_size,
1320                         { "U_PDU Size", "s5066sis.23.size", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1321                 },
1322                 { &hf_s5066_23_data,
1323                         { "(Part of) Rejected data", "s5066sis.23.data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
1324                 },
1325                 /* Type 24: S_EXPEDITED_UNIDATA_REQUEST */
1326                 { &hf_s5066_24_unused,
1327                         { "(Unused)", "s5066sis.24.unused", FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL }
1328                 },
1329                 { &hf_s5066_24_sapid,
1330                         { "Destination Sap ID", "s5066sis.24.sapid", FT_UINT8, BASE_DEC, VALS(s5066_sapid_assignments), 0x0F, NULL, HFILL }
1331                 },
1332                 { &hf_s5066_24_ttl,
1333                         { "Time-To-Live (x2 seconds)", "s5066sis.24.ttl", FT_UINT24, BASE_DEC, NULL, 0x0FFFFF, NULL, HFILL }
1334                 },
1335                 { &hf_s5066_24_size,
1336                         { "U_PDU Size", "s5066sis.24.size", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1337                 },
1338                 /* Type 25: S_EXPEDITED_UNIDATA_INDICATION */
1339                 { &hf_s5066_25_unused,
1340                         { "(Unused)", "s5066sis.25.unused", FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL }
1341                 },
1342                 { &hf_s5066_25_dest_sapid,
1343                         { "Destination Sap ID", "s5066sis.25.sapid", FT_UINT8, BASE_DEC, VALS(s5066_sapid_assignments), 0x0F, NULL, HFILL }
1344                 },
1345                 { &hf_s5066_25_tx_mode,
1346                         { "Transmission Mode", "s5066sis.25.txmode", FT_UINT8, BASE_HEX, VALS(s5066_st_txmode), 0xF0, NULL, HFILL }
1347                 },
1348                 { &hf_s5066_25_src_sapid,
1349                         { "Source Sap ID", "s5066sis.25.src_sapid", FT_UINT8, BASE_DEC, NULL, 0x0F, NULL, HFILL }
1350                 },
1351                 { &hf_s5066_25_size,
1352                         { "U_PDU Size", "s5066sis.25.size", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1353                 },
1354                 { &hf_s5066_25_err_blocks,
1355                         { "Number of errored blocks", "s5066sis.25.err_blocks", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1356                 },
1357                 { &hf_s5066_25_err_ptr,
1358                         { "Pointer to error block", "s5066sis.25.err_ptr", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }
1359                 },
1360                 { &hf_s5066_25_err_size,
1361                         { "Size of error block", "s5066sis.25.err_size", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1362                 },
1363                 { &hf_s5066_25_nrx_blocks,
1364                         { "Number of non-received blocks", "s5066sis.25.nrx_blocks", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1365                 },
1366                 { &hf_s5066_25_nrx_ptr,
1367                         { "Pointer to non-received block", "s5066sis.25.nrx_ptr", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }
1368                 },
1369                 { &hf_s5066_25_nrx_size,
1370                         { "Size of non-received block", "s5066sis.25.nrx_size", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1371                 },
1372                 /* Type 26: S_EXPEDITED_UNIDATA_REQUEST_CONFIRM */
1373                 { &hf_s5066_26_unused,
1374                         { "(Unused)", "s5066sis.26.unused", FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL }
1375                 },
1376                 { &hf_s5066_26_sapid,
1377                         { "Destination Sap ID", "s5066sis.26.sapid", FT_UINT8, BASE_DEC, VALS(s5066_sapid_assignments), 0x0F, NULL, HFILL }
1378                 },
1379                 { &hf_s5066_26_size,
1380                         { "U_PDU Size", "s5066sis.26.size", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1381                 },
1382                 { &hf_s5066_26_data,
1383                         { "(Part of) Confirmed data", "s5066sis.26.data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
1384                 },
1385                 /* Type 27: S_EXPEDITED_UNIDATA_REQUEST_REJECTED */
1386                 { &hf_s5066_27_reason,
1387                         { "Reason", "s5066sis.27.reason", FT_UINT8, BASE_DEC, VALS(s5066_27_reason), 0xF0, NULL, HFILL }
1388                 },
1389                 { &hf_s5066_27_sapid,
1390                         { "Destination Sap ID", "s5066sis.27.sapid", FT_UINT8, BASE_DEC, VALS(s5066_sapid_assignments), 0x0F, NULL, HFILL }
1391
1392                 },
1393                 { &hf_s5066_27_size,
1394                         { "U_PDU Size", "s5066sis.27.size", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
1395                 },
1396                 { &hf_s5066_27_data,
1397                         { "(Part of) Rejected data", "s5066sis.27.data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
1398                 },
1399
1400         };
1401
1402         /* Setup protocol subtree array */
1403         static int *ett[] = {
1404                 &ett_s5066,
1405                 &ett_s5066_pdu,
1406                 &ett_s5066_servicetype,
1407                 &ett_s5066_address,
1408                 &ett_s5066_client_transport_header,
1409         };
1410
1411         module_t *s5066_module;
1412
1413         proto_s5066 = proto_register_protocol ("STANAG 5066 (SIS layer)", "STANAG 5066 SIS", "s5066sis");
1414         proto_register_field_array(proto_s5066, hf, array_length(hf));
1415         proto_register_subtree_array(ett, array_length(ett));
1416
1417         s5066_tcp_handle = register_dissector("s5066sis", dissect_s5066_tcp, proto_s5066);
1418
1419         s5066_module = prefs_register_protocol(proto_s5066, proto_reg_handoff_s5066);
1420         prefs_register_bool_preference(s5066_module, "desegment_pdus",
1421                                        "Reassemble S5066 SIS PDUs spanning multiple TCP segments",
1422                                        "Whether the S5066 SIS dissector should reassemble PDUs spanning multiple TCP segments."
1423                                        " The default is to use reassembly.",
1424                                        &s5066_desegment);
1425         prefs_register_bool_preference(s5066_module, "edition_one",
1426                                        "Dissect edition 1.0 of STANAG 5066",
1427                                        "Whether the S5066 SIS dissector should dissect this edition of the STANAG."
1428                                        " This edition was never formally approved and is very rare. The common edition is edition 1.2.",
1429                                        &s5066_edition_one);
1430
1431         s5066sis_dissector_table = register_dissector_table("s5066sis.ctl.appid", "STANAG 5066 Application Identifier", proto_s5066, FT_UINT16, BASE_DEC);
1432
1433 }
1434
1435 void
1436 proto_reg_handoff_s5066(void)
1437 {
1438         static bool Initialized = false;
1439
1440         if (!Initialized) {
1441                 dissector_add_uint_with_preference("tcp.port", S5066_PORT, s5066_tcp_handle);
1442                 Initialized = true;
1443         }
1444
1445         if (!s5066_edition_one) {
1446                 s5066_header_size = 5;
1447                 s5066_size_offset = 3;
1448         } else {
1449                 s5066_header_size = 4;
1450                 s5066_size_offset = 2;
1451         }
1452 }
1453
1454 /*
1455  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
1456  *
1457  * Local variables:
1458  * c-basic-offset: 8
1459  * tab-width: 8
1460  * indent-tabs-mode: t
1461  * End:
1462  *
1463  * vi: set shiftwidth=8 tabstop=8 noexpandtab:
1464  * :indentSize=8:tabSize=8:noTabs=false:
1465  */