epan/dissectors/packet-cisco-erspan.c

   1 /* packet-erspan.c
   2  * Routines for the disassembly of Cisco's ERSPAN protocol
   3  *
   4  * Copyright 2005 Joerg Mayer (see AUTHORS file)
   5  * Updates for newer versions by Jason Masker <jason at masker.net>
   6  * Updates to support ERSPAN3 by Peter Membrey <peter@membrey.hk>
   7  *
   8  * Wireshark - Network traffic analyzer
   9  * By Gerald Combs <gerald@wireshark.org>
  10  * Copyright 1998 Gerald Combs
  11  *
  12  * SPDX-License-Identifier: GPL-2.0-or-later
  13  *
  14  * Protocol Spec:
  15  *   https://tools.ietf.org/html/draft-foschiano-erspan-03
  16  *
  17  * For ERSPAN packets, the "protocol type" field value in the GRE header
  18  * is 0x88BE (types I and II) or 0x22EB (type III).
  19  *
  20  * For 0x88BE, if the GRE header doesn't have the "sequence number present"
  21  * flag set, it's type I, with no ERSPAN header, otherwise it has an
  22  * ERSPAN header (it's supposed to be type II, but we look at the version
  23  * in the ERSPAN header; should we report an error if it's not version 1?).
  24  *
  25  * For 0x22EB, it always has an ERSPAN header (it's supposed to be type III,
  26  * but we look at the version in the ERSPAN header; should we report an
  27  * error if it's not version 2?).
  28  */
  29
  30 #include "config.h"
  31
  32 #include <epan/packet.h>
  33 #include <epan/expert.h>
  34 #include <epan/tfs.h>
  35 #include "packet-gre.h"
  36
  37 void proto_register_erspan(void);
  38 void proto_reg_handoff_erspan(void);
  39
  40 static int proto_erspan;
  41
  42 static int ett_erspan;
  43
  44 static int hf_erspan_version;
  45 static int hf_erspan_vlan;
  46 static int hf_erspan_cos;
  47 static int hf_erspan_encap;
  48 static int hf_erspan_truncated;
  49 static int hf_erspan_spanid;
  50 static int hf_erspan_reserved;
  51 static int hf_erspan_index;
  52 static int hf_erspan_timestamp;
  53 static int hf_erspan_direction;
  54
  55 static int hf_erspan_bso;
  56 static int hf_erspan_sgt;
  57 static int hf_erspan_p;
  58 static int hf_erspan_ft;
  59 static int hf_erspan_hw;
  60 static int hf_erspan_gra;
  61 static int hf_erspan_o;
  62
  63 /* Optional Sub-header */
  64 static int hf_erspan_platid;
  65 /* Platform ID = 1 */
  66 static int hf_erspan_pid1_rsvd1;
  67 static int hf_erspan_pid1_domain_id;
  68 static int hf_erspan_pid1_port_index;
  69 /* Platform ID = 3 */
  70 static int hf_erspan_pid3_rsvd1;
  71 static int hf_erspan_pid3_port_index;
  72 static int hf_erspan_pid3_timestamp;
  73 /* Platform ID = 4 */
  74 static int hf_erspan_pid4_rsvd1;
  75 static int hf_erspan_pid4_rsvd2;
  76 static int hf_erspan_pid4_rsvd3;
  77 /* Platform ID = 5 or 6 */
  78 static int hf_erspan_pid5_switchid;
  79 static int hf_erspan_pid5_port_index;
  80 static int hf_erspan_pid5_timestamp;
  81 /* Platform ID = 7 (or 0) */
  82 static int hf_erspan_pid7_rsvd1;
  83 static int hf_erspan_pid7_source_index;
  84 static int hf_erspan_pid7_timestamp;
  85 /* ID: 0x0, 0x2, 0x8-0x63 are reserved. */
  86 static int hf_erspan_pid_rsvd;
  87
  88 static expert_field ei_erspan_version_unknown;
  89
  90 #define PROTO_SHORT_NAME "ERSPAN"
  91 #define PROTO_LONG_NAME "Encapsulated Remote Switch Packet ANalysis"
  92
  93 static const true_false_string tfs_direction = { "Egress", "Ingress" };
  94
  95 #define ERSPAN_ENCAP_00 0
  96 #define ERSPAN_ENCAP_01 1
  97 #define ERSPAN_ENCAP_10 2
  98 #define ERSPAN_ENCAP_11 3
  99 static const value_string erspan_encap_vals[] = {
 100         {ERSPAN_ENCAP_00, "Originally without VLAN tag"},
 101         {ERSPAN_ENCAP_01, "Originally ISL encapsulated"},
 102         {ERSPAN_ENCAP_10, "Originally 802.1Q encapsulated"},
 103         {ERSPAN_ENCAP_11, "VLAN tag preserved in frame"},
 104
 105         {0, NULL}
 106 };
 107
 108 static const value_string erspan_bso_vals[] = {
 109         {0, "Good or unknown integrity"},
 110         {1, "Short frame"},
 111         {2, "Oversized frame"},
 112         {3, "CRC or alignment error"},
 113
 114         {0, NULL},
 115 };
 116
 117 static const value_string erspan_truncated_vals[] = {
 118         {0, "Not truncated"},
 119         {1, "Truncated"},
 120
 121         {0, NULL},
 122 };
 123
 124 #define ERSPAN_FT_ETHERNET      0
 125 #define ERSPAN_FT_IP            2
 126
 127 static const value_string erspan_ft_vals[] = {
 128         {ERSPAN_FT_ETHERNET, "Ethernet"},
 129         {ERSPAN_FT_IP, "IP"},
 130
 131         {0, NULL},
 132 };
 133
 134 static const value_string erspan_version_vals[] = {
 135         {1, "Type II"},
 136         {2, "Type III"},
 137
 138         {0, NULL},
 139 };
 140
 141 static const value_string erspan_granularity_vals[] = {
 142         {0, "100 microseconds"},
 143         {1, "100 nanoseconds"},
 144         {2, "IEEE 1588"},
 145         {3, "Custom granularity"},
 146
 147         {0, NULL}
 148 };
 149
 150 static dissector_handle_t ethnofcs_handle;
 151
 152 static int
 153 dissect_erspan(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
 154 {
 155         proto_item *ti;
 156         proto_tree *erspan_tree = NULL;
 157         tvbuff_t *frame_tvb;
 158         uint32_t offset = 0;
 159         uint32_t version;
 160         uint32_t frame_type = ERSPAN_FT_ETHERNET;
 161
 162         ti = proto_tree_add_item(tree, proto_erspan, tvb, offset, -1,
 163             ENC_NA);
 164         erspan_tree = proto_item_add_subtree(ti, ett_erspan);
 165
 166         col_set_str(pinfo->cinfo, COL_PROTOCOL, PROTO_SHORT_NAME);
 167         col_set_str(pinfo->cinfo, COL_INFO, PROTO_SHORT_NAME ":");
 168
 169         /*
 170          * Dissect the version field, which is present in all versions
 171          * of the header.
 172          */
 173         proto_tree_add_item_ret_uint(erspan_tree, hf_erspan_version, tvb,
 174                 offset, 2, ENC_BIG_ENDIAN, &version);
 175
 176         /* Put the version in the header. */
 177         proto_item_append_text(ti, " %s", val_to_str_const(version, erspan_version_vals, "Unknown"));
 178
 179         /*
 180          * Now dissect the rest of the header, based on the version.
 181          */
 182         switch (version) {
 183         case 1: {
 184                 uint32_t vlan, vlan_encap;
 185
 186                 proto_tree_add_item_ret_uint(erspan_tree, hf_erspan_vlan, tvb, offset, 2,
 187                         ENC_BIG_ENDIAN, &vlan);
 188                 offset += 2;
 189
 190                 proto_tree_add_item(erspan_tree, hf_erspan_cos, tvb, offset, 2,
 191                         ENC_BIG_ENDIAN);
 192                 proto_tree_add_item_ret_uint(erspan_tree, hf_erspan_encap, tvb,
 193                         offset, 2, ENC_BIG_ENDIAN, &vlan_encap);
 194                 if (pinfo->vlan_id == 0 && vlan_encap != ERSPAN_ENCAP_11) {
 195                         pinfo->vlan_id = vlan;
 196                 }
 197                 proto_tree_add_item(erspan_tree, hf_erspan_truncated, tvb, offset, 2,
 198                         ENC_BIG_ENDIAN);
 199                 proto_tree_add_item(erspan_tree, hf_erspan_spanid, tvb, offset, 2,
 200                         ENC_BIG_ENDIAN);
 201                 offset += 2;
 202
 203                 proto_tree_add_item(erspan_tree, hf_erspan_reserved, tvb,
 204                         offset, 4, ENC_BIG_ENDIAN);
 205                 proto_tree_add_item(erspan_tree, hf_erspan_index, tvb,
 206                         offset, 4, ENC_BIG_ENDIAN);
 207                 offset += 4;
 208                 break;
 209                 }
 210         case 2: {
 211                 uint32_t subheader = 0;
 212                 uint32_t vlan;
 213
 214                 proto_tree_add_item_ret_uint(erspan_tree, hf_erspan_vlan, tvb, offset, 2,
 215                         ENC_BIG_ENDIAN, &vlan);
 216                 pinfo->vlan_id = vlan;
 217                 offset += 2;
 218
 219                 proto_tree_add_item(erspan_tree, hf_erspan_cos, tvb, offset, 2,
 220                         ENC_BIG_ENDIAN);
 221                 proto_tree_add_item(erspan_tree, hf_erspan_bso, tvb, offset, 2,
 222                         ENC_BIG_ENDIAN);
 223                 proto_tree_add_item(erspan_tree, hf_erspan_truncated, tvb, offset, 2,
 224                         ENC_BIG_ENDIAN);
 225                 proto_tree_add_item(erspan_tree, hf_erspan_spanid, tvb, offset, 2,
 226                         ENC_BIG_ENDIAN);
 227                 offset += 2;
 228
 229                 proto_tree_add_item(erspan_tree, hf_erspan_timestamp, tvb,
 230                         offset, 4, ENC_BIG_ENDIAN);
 231                 offset += 4;
 232
 233                 proto_tree_add_item(erspan_tree, hf_erspan_sgt, tvb,
 234                         offset, 2, ENC_BIG_ENDIAN);
 235                 offset += 2;
 236
 237                 proto_tree_add_item(erspan_tree, hf_erspan_p, tvb,
 238                         offset, 2, ENC_BIG_ENDIAN);
 239
 240                 proto_tree_add_item_ret_uint(erspan_tree, hf_erspan_ft, tvb,
 241                         offset, 2, ENC_BIG_ENDIAN, &frame_type);
 242
 243                 proto_tree_add_item(erspan_tree, hf_erspan_hw, tvb,
 244                         offset, 2, ENC_BIG_ENDIAN);
 245
 246                 proto_tree_add_item(erspan_tree, hf_erspan_direction, tvb,
 247                         offset, 2, ENC_BIG_ENDIAN);
 248
 249                 proto_tree_add_item(erspan_tree, hf_erspan_gra, tvb,
 250                         offset, 2, ENC_BIG_ENDIAN);
 251
 252                 proto_tree_add_item_ret_uint(erspan_tree, hf_erspan_o, tvb,
 253                         offset, 2, ENC_BIG_ENDIAN, &subheader);
 254                 offset += 2;
 255
 256                 /* Platform Specific SubHeader, 8 octets, optional */
 257                 if (subheader) {
 258                         int32_t platform_id = tvb_get_ntohl(tvb, offset) >> 26;
 259
 260                         proto_tree_add_item(erspan_tree, hf_erspan_platid, tvb,
 261                                         offset, 4, ENC_BIG_ENDIAN);
 262
 263                         switch (platform_id) {
 264                                 case 1:
 265                                         proto_tree_add_item(erspan_tree, hf_erspan_pid1_rsvd1,
 266                                                 tvb, offset, 4, ENC_BIG_ENDIAN);
 267                                         proto_tree_add_item(erspan_tree, hf_erspan_pid1_domain_id,
 268                                                 tvb, offset, 4, ENC_BIG_ENDIAN);
 269                                         offset += 4;
 270
 271                                         proto_tree_add_item(erspan_tree, hf_erspan_pid1_port_index,
 272                                                 tvb, offset, 4, ENC_BIG_ENDIAN);
 273                                         offset += 4;
 274                                         break;
 275
 276                                 case 3:
 277                                         proto_tree_add_item(erspan_tree, hf_erspan_pid3_rsvd1,
 278                                                 tvb, offset, 4, ENC_BIG_ENDIAN);
 279                                         proto_tree_add_item(erspan_tree, hf_erspan_pid3_port_index,
 280                                                 tvb, offset, 4, ENC_BIG_ENDIAN);
 281                                         offset += 4;
 282
 283                                         proto_tree_add_item(erspan_tree, hf_erspan_pid3_timestamp,
 284                                                 tvb, offset, 4, ENC_BIG_ENDIAN);
 285                                         offset += 4;
 286                                         break;
 287
 288                                 case 4:
 289                                         proto_tree_add_item(erspan_tree, hf_erspan_pid4_rsvd1, tvb,
 290                                                 offset, 4, ENC_BIG_ENDIAN);
 291                                         proto_tree_add_item(erspan_tree, hf_erspan_pid4_rsvd2, tvb,
 292                                                 offset, 4, ENC_BIG_ENDIAN);
 293                                         offset += 4;
 294
 295                                         proto_tree_add_item(erspan_tree, hf_erspan_pid4_rsvd3, tvb,
 296                                                 offset, 4, ENC_BIG_ENDIAN);
 297                                         offset += 4;
 298                                         break;
 299
 300                                 case 5:
 301                                 case 6:
 302                                         proto_tree_add_item(erspan_tree, hf_erspan_pid5_switchid,
 303                                                 tvb, offset, 4, ENC_BIG_ENDIAN);
 304                                         proto_tree_add_item(erspan_tree, hf_erspan_pid5_port_index,
 305                                                 tvb, offset, 4, ENC_BIG_ENDIAN);
 306                                         offset += 4;
 307
 308                                         proto_tree_add_item(erspan_tree, hf_erspan_pid5_timestamp,
 309                                                 tvb, offset, 4, ENC_BIG_ENDIAN);
 310                                         offset += 4;
 311                                         break;
 312
 313                                 case 7:
 314                                 case 0: /* In some implementations it is used as an alias to 0x07. */
 315                                         proto_tree_add_item(erspan_tree, hf_erspan_pid7_rsvd1,
 316                                                 tvb, offset, 4, ENC_BIG_ENDIAN);
 317                                         proto_tree_add_item(erspan_tree, hf_erspan_pid7_source_index,
 318                                                 tvb, offset, 4, ENC_BIG_ENDIAN);
 319                                         offset += 4;
 320
 321                                         proto_tree_add_item(erspan_tree, hf_erspan_pid7_timestamp,
 322                                                 tvb, offset, 4, ENC_BIG_ENDIAN);
 323                                         offset += 4;
 324                                         break;
 325                                 default:
 326                                         /* ID: 0x0, 0x2, 0x8-0x63 are reserved. */
 327                                         proto_tree_add_item(erspan_tree, hf_erspan_pid_rsvd,
 328                                                 tvb, offset, 8, ENC_BIG_ENDIAN);
 329                                         offset += 8;
 330                                         break;
 331
 332                         }
 333                 }
 334                 break;
 335                 }
 336         default: {
 337                 proto_item *ti_ver;
 338
 339                 ti_ver = proto_tree_add_item(erspan_tree, hf_erspan_version, tvb, offset, 2,
 340                         ENC_BIG_ENDIAN);
 341                 expert_add_info(pinfo, ti_ver, &ei_erspan_version_unknown);
 342                 return 2;
 343                 }
 344         }
 345
 346         frame_tvb = tvb_new_subset_remaining(tvb, offset);
 347         switch (frame_type) {
 348
 349         case ERSPAN_FT_ETHERNET:
 350                 call_dissector(ethnofcs_handle, frame_tvb, pinfo, tree);
 351                 break;
 352
 353         default:
 354                 call_data_dissector(frame_tvb, pinfo, tree);
 355                 break;
 356         }
 357         return tvb_captured_length(tvb);
 358 }
 359
 360 static int
 361 dissect_erspan_88BE(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
 362 {
 363         bool has_erspan_header;
 364
 365         /*
 366          * Frames with a GRE type of 0x88BE have an ERSPAN header iff
 367          * the "sequence number present" flag is set in the GRE header.
 368          */
 369         if (data == NULL) {
 370                 /*
 371                  * We weren't handed the GRE flags or version.
 372                  *
 373                  * This can happen if a Linux cooked capture is done and
 374                  * we get a packet from an "ipgre" interface.
 375                  *
 376                  * For now, we just assume this is Type I, with no
 377                  * header.
 378                  */
 379                 has_erspan_header = false;
 380         } else {
 381                 gre_hdr_info_t *gre_hdr_info = (gre_hdr_info_t *)data;
 382
 383                 if (gre_hdr_info->flags_and_ver & GRE_SEQUENCE) {
 384                         /*
 385                          * "sequence number present" set, so it has a
 386                          * header.
 387                          */
 388                         has_erspan_header = true;
 389                 } else {
 390                         /*
 391                          * Not present, so no header.
 392                          */
 393                         has_erspan_header = false;
 394                 }
 395         }
 396
 397         if (has_erspan_header) {
 398                 /*
 399                  * We have a header, so dissect it, and then handle
 400                  * the payload.
 401                  */
 402                 return dissect_erspan(tvb, pinfo, tree, data);
 403         } else {
 404                 /*
 405                  * No header, so just hand the payload off to the
 406                  * Ethernet dissector.  Put in a placeholder for
 407                  * ERSPAN.
 408                  */
 409                 proto_item *ti;
 410
 411                 ti = proto_tree_add_item(tree, proto_erspan, tvb, 0, 0,
 412                     ENC_NA);
 413                 proto_item_append_text(ti, " Type I");
 414
 415                 col_set_str(pinfo->cinfo, COL_PROTOCOL, PROTO_SHORT_NAME);
 416                 col_set_str(pinfo->cinfo, COL_INFO, PROTO_SHORT_NAME ":");
 417
 418                 call_dissector(ethnofcs_handle, tvb, pinfo, tree);
 419                 return tvb_captured_length(tvb);
 420         }
 421 }
 422
 423 static int
 424 dissect_erspan_22EB(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
 425 {
 426         /*
 427          * Frames with a GRE type of 0x22EB always have an ERSPAN
 428          * header.
 429          */
 430         return dissect_erspan(tvb, pinfo, tree, data);
 431 }
 432
 433 void
 434 proto_register_erspan(void)
 435 {
 436         expert_module_t* expert_erspan;
 437
 438         static hf_register_info hf[] = {
 439
 440                 { &hf_erspan_version,
 441                 { "Version",    "erspan.version", FT_UINT16, BASE_DEC, VALS(erspan_version_vals),
 442                         0xf000, NULL, HFILL }},
 443
 444                 { &hf_erspan_vlan,
 445                 { "Vlan",       "erspan.vlan", FT_UINT16, BASE_DEC, NULL,
 446                         0x0fff, NULL, HFILL }},
 447
 448                 { &hf_erspan_cos,
 449                 { "COS",        "erspan.cos", FT_UINT16, BASE_DEC, NULL,
 450                         0xe000, NULL, HFILL }},
 451
 452                 { &hf_erspan_encap,
 453                 { "Encap",      "erspan.encap", FT_UINT16, BASE_DEC, VALS(erspan_encap_vals),
 454                         0x1800, NULL, HFILL }},
 455
 456                 { &hf_erspan_bso,
 457                 { "Bad/Short/Oversized",        "erspan.bso", FT_UINT16, BASE_DEC, VALS(erspan_bso_vals),
 458                         0x1800, NULL, HFILL }},
 459
 460
 461                 { &hf_erspan_truncated,
 462                 { "Truncated",  "erspan.truncated", FT_UINT16, BASE_DEC, VALS(erspan_truncated_vals),
 463                         0x0400, "ERSPAN packet exceeded the MTU size", HFILL }},
 464
 465                 { &hf_erspan_spanid,
 466                 { "SpanID",     "erspan.spanid", FT_UINT16, BASE_DEC, NULL,
 467                         0x03ff, NULL, HFILL }},
 468
 469                 { &hf_erspan_reserved,
 470                 { "Reserved",   "erspan.reserved", FT_UINT32, BASE_DEC, NULL,
 471                         0xfff00000, NULL, HFILL }},
 472
 473                 { &hf_erspan_index,
 474                 { "Index",      "erspan.index", FT_UINT32, BASE_DEC, NULL,
 475                         0x000fffff, NULL, HFILL }},
 476
 477                 { &hf_erspan_timestamp,
 478                 { "Timestamp",  "erspan.timestamp", FT_UINT32, BASE_DEC, NULL,
 479                         0x0, NULL, HFILL }},
 480
 481
 482                 { &hf_erspan_sgt,
 483                 { "Security Group Tag", "erspan.sgt", FT_UINT16, BASE_DEC, NULL,
 484                         0x0, NULL, HFILL }},
 485
 486                 { &hf_erspan_p,
 487                 { "Has Ethernet PDU",   "erspan.p", FT_UINT16, BASE_DEC, NULL,
 488                         0x8000, NULL, HFILL }},
 489
 490
 491                 { &hf_erspan_ft,
 492                 { "Frame Type", "erspan.ft", FT_UINT16, BASE_DEC, VALS(erspan_ft_vals),
 493                         0x7C00, NULL, HFILL }},
 494
 495                 { &hf_erspan_hw,
 496                 { "Hardware ID", "erspan.hw", FT_UINT16, BASE_DEC, NULL,
 497                         0x03f0, NULL, HFILL }},
 498
 499                 { &hf_erspan_gra,
 500                 { "Timestamp granularity", "erspan.gra", FT_UINT16, BASE_DEC, VALS(erspan_granularity_vals),
 501                         0x0006, NULL, HFILL }},
 502
 503                 { &hf_erspan_direction,
 504                 { "Direction",  "erspan.direction", FT_BOOLEAN, 16, TFS(&tfs_direction),
 505                         0x0008, NULL, HFILL }},
 506
 507                 { &hf_erspan_o,
 508                 { "Optional Sub headers", "erspan.o", FT_UINT16, BASE_DEC, NULL,
 509                         0x0001, NULL, HFILL }},
 510
 511                 /* Sub-header Fields, optional */
 512                 { &hf_erspan_platid,
 513                 { "Platform ID", "erspan.platid", FT_UINT32, BASE_DEC, NULL,
 514                         0xfc000000, NULL, HFILL }},
 515
 516                 /* ID = 1 */
 517                 { &hf_erspan_pid1_rsvd1,
 518                 { "Reserved", "erspan.pid1.rsvd1", FT_UINT32, BASE_DEC, NULL,
 519                         0x03fff000, NULL, HFILL }},
 520
 521                 { &hf_erspan_pid1_domain_id,
 522                 { "VSM Domain ID", "erspan.pid1.vsmid", FT_UINT32, BASE_DEC, NULL,
 523                         0x00000fff, NULL, HFILL }},
 524
 525                 { &hf_erspan_pid1_port_index,
 526                 { "Port ID/Index", "erspan.pid1.port_index", FT_UINT32, BASE_DEC, NULL,
 527                         0x0, NULL, HFILL }},
 528
 529                 /* ID = 3 */
 530                 { &hf_erspan_pid3_rsvd1,
 531                 { "Reserved", "erspan.pid3.rsvd1", FT_UINT32, BASE_DEC, NULL,
 532                         0x03ffc000, NULL, HFILL }},
 533
 534                 { &hf_erspan_pid3_port_index,
 535                 { "Port ID/Index", "erspan.pid3.port_index", FT_UINT32, BASE_DEC, NULL,
 536                         0x00003fff, NULL, HFILL }},
 537
 538                 { &hf_erspan_pid3_timestamp,
 539                 { "Upper 32-bit Timestamp", "erspan.pid3.timestamp", FT_UINT32, BASE_DEC, NULL,
 540                         0x0, NULL, HFILL }},
 541
 542                 /* ID = 4 */
 543                 { &hf_erspan_pid4_rsvd1,
 544                 { "Reserved", "erspan.pid4.rsvd1", FT_UINT32, BASE_DEC, NULL,
 545                         0x03ffc000, NULL, HFILL }},
 546
 547                 { &hf_erspan_pid4_rsvd2,
 548                 { "Reserved", "erspan.pid4.rsvd2", FT_UINT32, BASE_DEC, NULL,
 549                         0x00003fff, NULL, HFILL }},
 550
 551                 { &hf_erspan_pid4_rsvd3,
 552                 { "Reserved", "erspan.pid4.rsvd3", FT_UINT32, BASE_DEC, NULL,
 553                         0xffffffff, NULL, HFILL }},
 554
 555                 /* ID = 5 or 6 */
 556                 { &hf_erspan_pid5_switchid,
 557                 { "Switch ID", "erspan.pid5.switchid", FT_UINT32, BASE_DEC, NULL,
 558                         0x03ff0000, NULL, HFILL }},
 559
 560                 { &hf_erspan_pid5_port_index,
 561                 { "Port ID/Index", "erspan.pid5.port_index", FT_UINT32, BASE_DEC, NULL,
 562                         0x0000ffff, NULL, HFILL }},
 563
 564                 { &hf_erspan_pid5_timestamp,
 565                 { "Timestamp (seconds)", "erspan.pid5.timestamp", FT_UINT32, BASE_DEC, NULL,
 566                         0x0, NULL, HFILL }},
 567
 568                 /* ID = 7 (or 0) */
 569                 { &hf_erspan_pid7_rsvd1,
 570                 { "Reserved", "erspan.pid7.rsvd1", FT_UINT32, BASE_DEC, NULL,
 571                         0x03f00000, NULL, HFILL }},
 572
 573                 { &hf_erspan_pid7_source_index,
 574                 { "Source Index", "erspan.pid7.source_index", FT_UINT32, BASE_DEC, NULL,
 575                         0x000fffff, NULL, HFILL }},
 576
 577                 { &hf_erspan_pid7_timestamp,
 578                 { "Upper 32-bit Timestamp", "erspan.pid7.timestamp", FT_UINT32, BASE_DEC, NULL,
 579                         0x0, NULL, HFILL }},
 580
 581                 /* Reserved */
 582                 { &hf_erspan_pid_rsvd,
 583                 { "Reserved", "erspan.pid.rsvd", FT_UINT64, BASE_DEC, NULL,
 584                         0x03ffffff, NULL, HFILL }},
 585
 586         };
 587
 588         static int *ett[] = {
 589                 &ett_erspan,
 590         };
 591
 592         static ei_register_info ei[] = {
 593                 { &ei_erspan_version_unknown, { "erspan.version.unknown", PI_UNDECODED, PI_WARN, "Unknown version, please report or test to use fake ERSPAN preference", EXPFILL }},
 594         };
 595
 596         proto_erspan = proto_register_protocol(PROTO_LONG_NAME, PROTO_SHORT_NAME, "erspan");
 597         proto_register_field_array(proto_erspan, hf, array_length(hf));
 598         proto_register_subtree_array(ett, array_length(ett));
 599         expert_erspan = expert_register_protocol(proto_erspan);
 600         expert_register_field_array(expert_erspan, ei, array_length(ei));
 601
 602         register_dissector("erspan", dissect_erspan, proto_erspan);
 603 }
 604
 605 void
 606 proto_reg_handoff_erspan(void)
 607 {
 608         dissector_handle_t erspan_88BE_handle;
 609         dissector_handle_t erspan_22EB_handle;
 610
 611         ethnofcs_handle = find_dissector_add_dependency("eth_withoutfcs", proto_erspan);
 612
 613         erspan_88BE_handle = create_dissector_handle(dissect_erspan_88BE, proto_erspan);
 614         dissector_add_uint("gre.proto", GRE_ERSPAN_88BE, erspan_88BE_handle);
 615         erspan_22EB_handle = create_dissector_handle(dissect_erspan_22EB, proto_erspan);
 616         dissector_add_uint("gre.proto", GRE_ERSPAN_22EB, erspan_22EB_handle);
 617
 618 }
 619
 620 /*
 621  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 622  *
 623  * Local variables:
 624  * c-basic-offset: 8
 625  * tab-width: 8
 626  * indent-tabs-mode: t
 627  * End:
 628  *
 629  * vi: set shiftwidth=8 tabstop=8 noexpandtab:
 630  * :indentSize=8:tabSize=8:noTabs=false:
 631  */