epan/dissectors/packet-iso10681.c

   1 /* packet-iso10681.c
   2  * ISO 10681-2 ISO FlexRay TP
   3  * By Dr. Lars Voelker <lars.voelker@technica-engineering.de>
   4  * Copyright 2021-2023 Dr. Lars Voelker
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * SPDX-License-Identifier: GPL-2.0-or-later
  11  *
  12  * Also see packet-iso15765.c / packet-iso15765.h
  13  */
  14
  15 #include "config.h"
  16
  17 #include <epan/packet.h>
  18 #include <epan/prefs.h>
  19 #include <epan/decode_as.h>
  20 #include <epan/reassemble.h>
  21 #include <epan/expert.h>
  22 #include <epan/proto_data.h>
  23
  24 #include "packet-iso10681.h"
  25 #include "packet-flexray.h"
  26
  27 void proto_register_iso10681(void);
  28 void proto_reg_handoff_iso10681(void);
  29
  30 /* StartFrame or StartFrameAck */
  31 #define ISO10681_TYPE_MASK                  0xF0
  32 #define ISO10681_TYPE_START_FRAME           4
  33 #define ISO10681_TYPE_CONSECUTIVE_FRAME_1   5
  34 #define ISO10681_TYPE_CONSECUTIVE_FRAME_2   6
  35 #define ISO10681_TYPE_CONSECUTIVE_FRAME_EOB 7
  36 #define ISO10681_TYPE_FLOW_CONTROL          8
  37 #define ISO10681_TYPE_LAST_FRAME            9
  38
  39 #define ISO10681_TYPE_PART2_MASK            0x0F
  40
  41 #define ISO10681_FLOW_STATUS_CTS            3
  42 #define ISO10681_FLOW_STATUS_ACK_RETRY      4
  43 #define ISO10681_FLOW_STATUS_WAIT           5
  44 #define ISO10681_FLOW_STATUS_ABORT          6
  45 #define ISO10681_FLOW_STATUS_OVERFLOW       7
  46
  47 typedef struct iso10681_identifier {
  48     uint32_t id;
  49     uint32_t seq;
  50     uint16_t frag_id;
  51     bool last;
  52 } iso10681_identifier_t;
  53
  54 typedef struct iso10681_frame {
  55     uint32_t seq;
  56     uint32_t offset;
  57     uint32_t len;
  58     bool error;
  59     bool complete;
  60     uint16_t last_frag_id;
  61     uint8_t  frag_id_high[16];
  62 } iso10681_frame_t;
  63
  64 static const value_string iso10681_message_types[] = {
  65     {ISO10681_TYPE_START_FRAME,           "Start Frame"},
  66     {ISO10681_TYPE_CONSECUTIVE_FRAME_1,   "Consecutive Frame 1"},
  67     {ISO10681_TYPE_CONSECUTIVE_FRAME_2,   "Consecutive Frame 2"},
  68     {ISO10681_TYPE_CONSECUTIVE_FRAME_EOB, "Consecutive Frame EOB"},
  69     {ISO10681_TYPE_FLOW_CONTROL,          "Flow Control"},
  70     {ISO10681_TYPE_LAST_FRAME,            "Last Frame"},
  71     {0, NULL}
  72 };
  73
  74 static const value_string iso10681_flow_status_values[] = {
  75     {ISO10681_FLOW_STATUS_CTS,            "Continue to Send"},
  76     {ISO10681_FLOW_STATUS_ACK_RETRY,      "Ack/Retry"},
  77     {ISO10681_FLOW_STATUS_WAIT,           "Wait"},
  78     {ISO10681_FLOW_STATUS_ABORT,          "Abort"},
  79     {ISO10681_FLOW_STATUS_OVERFLOW,       "Overflow"},
  80     {0, NULL}
  81 };
  82
  83 static const value_string iso10681_start_type2_values[] = {
  84     {0,      "Unacknowledged"},
  85     {1,      "Acknowledged"},
  86     {0, NULL}
  87 };
  88
  89 static const value_string iso10681_fc_bc_scexp_values[] = {
  90     {0,      "0 cycles"},
  91     {1,      "1 cycle"},
  92     {2,      "3 cycles"},
  93     {3,      "7 cycles"},
  94     {4,      "15 cycles"},
  95     {5,      "31 cycles"},
  96     {6,      "63 cycles"},
  97     {7,      "127 cycles"},
  98     {0, NULL}
  99 };
 100
 101 static const value_string iso10681_fc_ack_values[] = {
 102     {0,      "Acknowledge"},
 103     {1,      "Retry Request"},
 104     {0, NULL}
 105 };
 106
 107 static int hf_iso10681_target_address;
 108 static int hf_iso10681_source_address;
 109 static int hf_iso10681_type;
 110 static int hf_iso10681_type2;
 111 static int hf_iso10681_frame_payload_length;
 112 static int hf_iso10681_message_length;
 113 static int hf_iso10681_sequence_number;
 114 static int hf_iso10681_fc_flow_status;
 115 static int hf_iso10681_fc_bandwidth_control;
 116 static int hf_iso10681_fc_bc_separation_cycle_exp;
 117 static int hf_iso10681_fc_bc_max_num_pdu_per_cycle;
 118 static int hf_iso10681_fc_buffer_size;
 119 static int hf_iso10681_fc_ack;
 120 static int hf_iso10681_fc_byte_position;
 121
 122
 123 static int ett_iso10681;
 124 static int ett_iso10681_bandwidth_control;
 125
 126 static expert_field ei_iso10681_message_type_bad;
 127
 128 static int proto_iso10681;
 129 static dissector_handle_t iso10681_handle_flexray;
 130
 131 static dissector_table_t subdissector_table;
 132
 133 static range_t   *iso10681_flexray_ids;
 134 static bool       iso10681_spread_over_multiple_cycles = true;
 135
 136 static reassembly_table iso10681_reassembly_table;
 137 static wmem_map_t *iso10681_frame_table;
 138 static wmem_map_t *iso10681_seq_table;
 139 static uint32_t    next_seqnum;
 140
 141
 142 static int hf_iso10681_fragments;
 143 static int hf_iso10681_fragment;
 144 static int hf_iso10681_fragment_overlap;
 145 static int hf_iso10681_fragment_overlap_conflicts;
 146 static int hf_iso10681_fragment_multiple_tails;
 147 static int hf_iso10681_fragment_too_long_fragment;
 148 static int hf_iso10681_fragment_error;
 149 static int hf_iso10681_fragment_count;
 150 static int hf_iso10681_reassembled_in;
 151 static int hf_iso10681_reassembled_length;
 152
 153 static int ett_iso10681_fragment;
 154 static int ett_iso10681_fragments;
 155
 156 static const fragment_items iso10681_frag_items = {
 157     /* Fragment subtrees */
 158     &ett_iso10681_fragment,
 159     &ett_iso10681_fragments,
 160     /* Fragment fields */
 161     &hf_iso10681_fragments,
 162     &hf_iso10681_fragment,
 163     &hf_iso10681_fragment_overlap,
 164     &hf_iso10681_fragment_overlap_conflicts,
 165     &hf_iso10681_fragment_multiple_tails,
 166     &hf_iso10681_fragment_too_long_fragment,
 167     &hf_iso10681_fragment_error,
 168     &hf_iso10681_fragment_count,
 169     /* Reassembled in field */
 170     &hf_iso10681_reassembled_in,
 171     /* Reassembled length field */
 172     &hf_iso10681_reassembled_length,
 173     /* Reassembled data field */
 174     NULL,
 175     "ISO10681 fragments"
 176 };
 177
 178 static uint32_t
 179 iso10681_seqnum(uint32_t frame_id, bool new_seqnum) {
 180     uint32_t  *ret;
 181
 182     ret = (uint32_t *)wmem_map_lookup(iso10681_seq_table, GUINT_TO_POINTER(frame_id));
 183
 184     if (ret == NULL) {
 185         ret = wmem_new0(wmem_file_scope(), uint32_t);
 186         *ret = next_seqnum++;
 187         wmem_map_insert(iso10681_seq_table, GUINT_TO_POINTER(frame_id), ret);
 188     } else {
 189         if (new_seqnum) {
 190             (*ret) = next_seqnum++;
 191         }
 192     }
 193
 194     return *ret;
 195 }
 196
 197 static int
 198 dissect_iso10681(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, uint32_t frame_id, uint32_t frame_length _U_) {
 199     proto_tree *iso10681_tree;
 200     proto_item *ti;
 201     proto_item *ti_type;
 202     uint32_t    type;
 203     uint32_t    offset;
 204
 205     iso10681_identifier_t* iso10681_info;
 206     bool        fragmented = false;
 207     uint32_t    seqnum = 0;
 208
 209     uint32_t    data_length = 0;
 210     uint32_t    full_len = 0;
 211     uint32_t    target_addr = 0;
 212     uint32_t    source_addr = 0;
 213
 214     tvbuff_t*   next_tvb = NULL;
 215     bool        complete = false;
 216
 217     col_set_str(pinfo->cinfo, COL_PROTOCOL, "ISO10681");
 218     col_clear(pinfo->cinfo, COL_INFO);
 219
 220     iso10681_info = (iso10681_identifier_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_iso10681, 0);
 221
 222     if (!iso10681_info) {
 223         iso10681_info = wmem_new0(wmem_file_scope(), iso10681_identifier_t);
 224         iso10681_info->id = frame_id;
 225         iso10681_info->last = false;
 226         p_add_proto_data(wmem_file_scope(), pinfo, proto_iso10681, 0, iso10681_info);
 227     }
 228
 229     ti = proto_tree_add_item(tree, proto_iso10681, tvb, 0, -1, ENC_NA);
 230     iso10681_tree = proto_item_add_subtree(ti, ett_iso10681);
 231
 232     proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_target_address, tvb, 0, 2, ENC_BIG_ENDIAN, &target_addr);
 233     proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_source_address, tvb, 2, 2, ENC_BIG_ENDIAN, &source_addr);
 234     offset = 4;
 235
 236     ti_type = proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_type, tvb, offset, 1, ENC_BIG_ENDIAN, &type);
 237     col_add_str(pinfo->cinfo, COL_INFO, val_to_str(type, iso10681_message_types, "Unknown (0x%02x)"));
 238
 239     switch (type) {
 240         case ISO10681_TYPE_START_FRAME: {
 241             uint32_t type2_value;
 242             proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_type2, tvb, offset, 1, ENC_BIG_ENDIAN, &type2_value);
 243             col_append_fstr(pinfo->cinfo, COL_INFO, " %s", val_to_str(type2_value, iso10681_start_type2_values, "Unknown (0x%x)"));
 244
 245             proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_frame_payload_length, tvb, offset + 1, 1, ENC_BIG_ENDIAN, &data_length);
 246             proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_message_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN, &full_len);
 247             offset += 4;
 248
 249             fragmented = true;
 250             seqnum = 0;
 251
 252             if (!(pinfo->fd->visited)) {
 253                 iso10681_frame_t *iso10681_frame = wmem_new0(wmem_file_scope(), iso10681_frame_t);
 254                 iso10681_frame->seq = iso10681_info->seq = iso10681_seqnum(frame_id, true);
 255                 iso10681_frame->len = full_len;
 256
 257                 wmem_map_insert(iso10681_frame_table, GUINT_TO_POINTER(iso10681_info->seq), iso10681_frame);
 258             }
 259
 260             col_append_fstr(pinfo->cinfo, COL_INFO, " (Segment Length: %d, Total Len: %d)", data_length, full_len);
 261
 262             break;
 263         }
 264         case ISO10681_TYPE_CONSECUTIVE_FRAME_1:
 265         case ISO10681_TYPE_CONSECUTIVE_FRAME_2:
 266         case ISO10681_TYPE_CONSECUTIVE_FRAME_EOB: {
 267             proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_sequence_number, tvb, offset, 1, ENC_BIG_ENDIAN, &seqnum);
 268             proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_frame_payload_length, tvb, offset + 1, 1, ENC_BIG_ENDIAN, &data_length);
 269             offset += 2;
 270
 271             fragmented = true;
 272
 273             if (!(pinfo->fd->visited)) {
 274                 iso10681_info->seq = iso10681_seqnum(frame_id, false);
 275             }
 276
 277             col_append_fstr(pinfo->cinfo, COL_INFO, " (Segment Length: %d, Sequence Number: %d)", data_length, seqnum);
 278             break;
 279         }
 280         case ISO10681_TYPE_LAST_FRAME: {
 281             proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_frame_payload_length, tvb, offset + 1, 1, ENC_BIG_ENDIAN, &data_length);
 282             proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_message_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN, &full_len);
 283             offset += 4;
 284
 285             fragmented = true;
 286
 287             if (!(pinfo->fd->visited)) {
 288                 iso10681_info->seq = iso10681_seqnum(frame_id, false);
 289             }
 290
 291             col_append_fstr(pinfo->cinfo, COL_INFO, " (Segment Length: %d, Total Len: %d)", data_length, full_len);
 292             break;
 293         }
 294         case ISO10681_TYPE_FLOW_CONTROL: {
 295             unsigned flow_status = 0;
 296             proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_fc_flow_status, tvb, offset, 1, ENC_BIG_ENDIAN, &flow_status);
 297
 298             switch (flow_status) {
 299             case ISO10681_FLOW_STATUS_CTS: {
 300                 static int * const bandwidth_control[] = {
 301                     &hf_iso10681_fc_bc_max_num_pdu_per_cycle,
 302                     &hf_iso10681_fc_bc_separation_cycle_exp,
 303                     NULL
 304                 };
 305
 306                 proto_tree_add_bitmask(iso10681_tree, tvb, offset + 1, hf_iso10681_fc_bandwidth_control, ett_iso10681_bandwidth_control,
 307                                        bandwidth_control, ENC_BIG_ENDIAN);
 308                 proto_tree_add_item(iso10681_tree, hf_iso10681_fc_buffer_size, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
 309                 break;
 310             }
 311             case ISO10681_FLOW_STATUS_ACK_RETRY:
 312                 proto_tree_add_item(iso10681_tree, hf_iso10681_fc_ack, tvb, offset + 1, 1, ENC_BIG_ENDIAN);
 313                 proto_tree_add_item(iso10681_tree, hf_iso10681_fc_byte_position, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
 314                 break;
 315             }
 316
 317             col_append_fstr(pinfo->cinfo, COL_INFO, " (Flow Status: %s)", val_to_str(flow_status, iso10681_flow_status_values, "unknown (0x%x)"));
 318             break;
 319         }
 320         default:
 321             expert_add_info_format(pinfo, ti_type, &ei_iso10681_message_type_bad, "Bad Message Type value %u", type);
 322             return offset;
 323     }
 324
 325     /* show data */
 326     if (data_length > 0) {
 327         col_append_fstr(pinfo->cinfo, COL_INFO, "  %s", tvb_bytes_to_str_punct(pinfo->pool, tvb, offset, data_length, ' '));
 328     }
 329
 330     if (fragmented) {
 331         tvbuff_t *new_tvb = NULL;
 332         iso10681_frame_t *iso10681_frame;
 333         uint16_t frag_id = seqnum;
 334
 335         /* Get frame information */
 336         iso10681_frame = (iso10681_frame_t *)wmem_map_lookup(iso10681_frame_table, GUINT_TO_POINTER(iso10681_info->seq));
 337         if (iso10681_frame != NULL) {
 338             if (type == ISO10681_TYPE_LAST_FRAME) {
 339                 frag_id = iso10681_frame->last_frag_id + 1;
 340             }
 341
 342             if (!(pinfo->fd->visited)) {
 343                 DISSECTOR_ASSERT(frag_id < 16);
 344                 uint16_t tmp = iso10681_frame->frag_id_high[frag_id]++;
 345                 /* Make sure that we assert on using more than 4096 (16*255) segments.*/
 346                 DISSECTOR_ASSERT(iso10681_frame->frag_id_high[frag_id] != 0);
 347                 frag_id += tmp * 16;
 348
 349                 /* Save the frag_id for subsequent dissection */
 350                 iso10681_info->frag_id = frag_id;
 351             }
 352
 353             if (!iso10681_frame->error) {
 354                 bool           save_fragmented = pinfo->fragmented;
 355                 uint32_t       len = data_length;
 356                 fragment_head *frag_msg;
 357
 358                 /* Check if it's the last packet */
 359                 if (!(pinfo->fd->visited)) {
 360                     /* Update the last_frag_id */
 361                     if (frag_id > iso10681_frame->last_frag_id) {
 362                         iso10681_frame->last_frag_id = frag_id;
 363                     }
 364
 365                     iso10681_frame->offset += len;
 366                     if (iso10681_frame->offset >= iso10681_frame->len) {
 367                         iso10681_info->last = true;
 368                         iso10681_frame->complete = true;
 369                         len -= (iso10681_frame->offset - iso10681_frame->len);
 370                     }
 371                 }
 372                 pinfo->fragmented = true;
 373
 374                 /* Add fragment to fragment table */
 375                 frag_msg = fragment_add_seq_check(&iso10681_reassembly_table, tvb, offset, pinfo, iso10681_info->seq, NULL,
 376                                                   iso10681_info->frag_id, len, !iso10681_info->last);
 377
 378                 new_tvb = process_reassembled_data(tvb, offset, pinfo, "Reassembled Message", frag_msg, &iso10681_frag_items, NULL,
 379                                                    iso10681_tree);
 380
 381                 if (frag_msg && frag_msg->reassembled_in != pinfo->num) {
 382                     col_append_frame_number(pinfo, COL_INFO, " [Reassembled in #%u]", frag_msg->reassembled_in);
 383                 }
 384
 385                 pinfo->fragmented = save_fragmented;
 386             }
 387
 388             if (new_tvb) {
 389                 /* This is a complete TVB to dissect */
 390                 next_tvb = new_tvb;
 391                 complete = true;
 392             } else {
 393                 next_tvb = tvb_new_subset_length(tvb, offset, data_length);
 394             }
 395         }
 396     }
 397
 398     if (next_tvb) {
 399         iso10681_info_t iso10681data;
 400         iso10681data.id = frame_id;
 401         iso10681data.len = frame_length;
 402         iso10681data.target_address = target_addr;
 403         iso10681data.source_address = source_addr;
 404
 405         if (!complete || !dissector_try_payload_with_data(subdissector_table, next_tvb, pinfo, tree, true, &iso10681data)) {
 406             call_data_dissector(next_tvb, pinfo, tree);
 407         }
 408     }
 409
 410     return tvb_captured_length(tvb);
 411 }
 412
 413 static int
 414 dissect_iso10681_flexray(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data) {
 415     DISSECTOR_ASSERT(data);
 416     flexray_info_t *flexray_info = (flexray_info_t *)data;
 417     uint32_t id = flexray_flexrayinfo_to_flexrayid(flexray_info);
 418
 419     if (iso10681_spread_over_multiple_cycles) {
 420         /* masking out the cycle */
 421         id |= FLEXRAY_ID_CYCLE_MASK;
 422     }
 423
 424     return dissect_iso10681(tvb, pinfo, tree, id, tvb_captured_length(tvb));
 425 }
 426
 427 void
 428 proto_register_iso10681(void) {
 429     module_t *iso10681_module;
 430
 431     static hf_register_info hf[] = {
 432         { &hf_iso10681_source_address, {
 433             "Source Address", "iso10681.source_address", FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL } },
 434         { &hf_iso10681_target_address, {
 435             "Target Address", "iso10681.target_address", FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL } },
 436         { &hf_iso10681_type, {
 437             "Type", "iso10681.type", FT_UINT8, BASE_HEX, VALS(iso10681_message_types), ISO10681_TYPE_MASK, NULL, HFILL } },
 438         { &hf_iso10681_type2, {
 439             "Type Ack", "iso10681.type_ack", FT_UINT8, BASE_HEX, VALS(iso10681_start_type2_values), ISO10681_TYPE_PART2_MASK, NULL, HFILL } },
 440         { &hf_iso10681_frame_payload_length, {
 441             "Frame Payload Length", "iso10681.frame_payload_length", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } },
 442         { &hf_iso10681_message_length, {
 443             "Message Length", "iso10681.message_length", FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL } },
 444         { &hf_iso10681_sequence_number, {
 445             "Sequence Number", "iso10681.sequence_number", FT_UINT8, BASE_DEC, NULL, ISO10681_TYPE_PART2_MASK, NULL, HFILL } },
 446         { &hf_iso10681_fc_flow_status, {
 447             "Flow Status", "iso10681.flow_status", FT_UINT8, BASE_DEC, VALS(iso10681_flow_status_values), ISO10681_TYPE_PART2_MASK, NULL, HFILL } },
 448         { &hf_iso10681_fc_bandwidth_control, {
 449             "Bandwidth Control", "iso10681.bandwidth_control", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } },
 450         { &hf_iso10681_fc_bc_separation_cycle_exp, {
 451             "Separation Cycle Exp", "iso10681.bandwidth_control.separation_cycle_exp", FT_UINT8, BASE_DEC, VALS(iso10681_fc_bc_scexp_values), 0x07, NULL, HFILL } },
 452         { &hf_iso10681_fc_bc_max_num_pdu_per_cycle, {
 453             "Max Number of PDUs per Cycle", "iso10681.bandwidth_control.max_number_pdus_per_cycle", FT_UINT8, BASE_DEC, NULL, 0xF8, NULL, HFILL } },
 454         { &hf_iso10681_fc_buffer_size, {
 455             "Buffer Size", "iso10681.buffer_size", FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL } },
 456         { &hf_iso10681_fc_ack, {
 457             "Ack", "iso10681.ack", FT_UINT8, BASE_HEX, VALS(iso10681_fc_ack_values), 0, NULL, HFILL } },
 458         { &hf_iso10681_fc_byte_position, {
 459             "Byte Position", "iso10681.byte_position", FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL } },
 460
 461         { &hf_iso10681_fragments, {
 462             "Message fragments", "iso10681.fragments", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } },
 463         { &hf_iso10681_fragment, {
 464             "Message fragment", "iso10681.fragment", FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } },
 465         { &hf_iso10681_fragment_overlap, {
 466             "Message fragment overlap", "iso10681.fragment.overlap", FT_BOOLEAN, BASE_NONE, NULL, 0x00, NULL, HFILL } },
 467         { &hf_iso10681_fragment_overlap_conflicts, {
 468             "Message fragment overlapping with conflicting data", "iso10681.fragment.overlap.conflicts", FT_BOOLEAN, BASE_NONE, NULL, 0x00, NULL, HFILL } },
 469         { &hf_iso10681_fragment_multiple_tails, {
 470             "Message has multiple tail fragments", "iso10681.fragment.multiple_tails", FT_BOOLEAN, BASE_NONE, NULL, 0x00, NULL, HFILL } },
 471         { &hf_iso10681_fragment_too_long_fragment, {
 472             "Message fragment too long", "iso10681.fragment.too_long_fragment", FT_BOOLEAN, BASE_NONE, NULL, 0x00, NULL, HFILL } },
 473         { &hf_iso10681_fragment_error, {
 474             "Message defragmentation error", "iso10681.fragment.error", FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } },
 475         { &hf_iso10681_fragment_count, {
 476             "Message fragment count", "iso10681.fragment.count", FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL } },
 477         { &hf_iso10681_reassembled_in, {
 478             "Reassembled in", "iso10681.reassembled.in", FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } },
 479         { &hf_iso10681_reassembled_length, {
 480             "Reassembled length", "iso10681.reassembled.length", FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL } },
 481     };
 482
 483     /* Setup protocol subtree array */
 484     static int *ett[] = {
 485         &ett_iso10681,
 486         &ett_iso10681_bandwidth_control,
 487         &ett_iso10681_fragment,
 488         &ett_iso10681_fragments,
 489     };
 490
 491     static ei_register_info ei[] = {
 492         {
 493             &ei_iso10681_message_type_bad, { "iso10681.message_type.bad", PI_MALFORMED, PI_ERROR, "Bad Message Type value", EXPFILL }
 494         },
 495     };
 496
 497     expert_module_t* expert_iso10681;
 498
 499     proto_iso10681 = proto_register_protocol("ISO10681 Protocol", "ISO 10681", "iso10681");
 500     iso10681_handle_flexray = register_dissector("iso10681", dissect_iso10681_flexray, proto_iso10681);
 501
 502     /* Register configuration options */
 503     iso10681_module = prefs_register_protocol(proto_iso10681, proto_reg_handoff_iso10681);
 504     prefs_register_range_preference(iso10681_module, "flexray.flexrayids", "FlexRay IDs",
 505         "FlexRay IDs (combined) - 4bit Bus-ID (0 any), 4bit Channel, 16bit Frame-ID, 8bit Cycle (0xff any)",
 506         &iso10681_flexray_ids, 0xffffffff);
 507
 508     prefs_register_bool_preference(iso10681_module, "spread_over_cycles", "Ignore Cycle when matching",
 509         "TP frames are spread over multiple cycles. Cycle is ignored for matching.",
 510         &iso10681_spread_over_multiple_cycles);
 511
 512     proto_register_field_array(proto_iso10681, hf, array_length(hf));
 513     proto_register_subtree_array(ett, array_length(ett));
 514
 515     expert_iso10681 = expert_register_protocol(proto_iso10681);
 516     expert_register_field_array(expert_iso10681, ei, array_length(ei));
 517
 518     iso10681_seq_table = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(), g_direct_hash, g_direct_equal);
 519     iso10681_frame_table = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(), g_direct_hash, g_direct_equal);
 520
 521     reassembly_table_register(&iso10681_reassembly_table, &addresses_reassembly_table_functions);
 522
 523     subdissector_table = register_decode_as_next_proto(proto_iso10681, "iso10681.subdissector", "ISO10681 next level dissector", NULL);
 524 }
 525
 526 void
 527 proto_reg_handoff_iso10681(void) {
 528     static bool initialized = false;
 529
 530     if (!initialized) {
 531         dissector_add_for_decode_as("flexray.subdissector", iso10681_handle_flexray);
 532
 533         initialized = true;
 534     } else {
 535         dissector_delete_all("flexray.combined_id", iso10681_handle_flexray);
 536     }
 537
 538     dissector_add_uint_range("flexray.combined_id", iso10681_flexray_ids, iso10681_handle_flexray);
 539 }
 540
 541 /*
 542  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 543  *
 544  * Local variables:
 545  * c-basic-offset: 4
 546  * tab-width: 8
 547  * indent-tabs-mode: nil
 548  * End:
 549  *
 550  * vi: set shiftwidth=4 tabstop=8 expandtab:
 551  * :indentSize=4:tabSize=8:noTabs=true:
 552  */