epan/dissectors/packet-itdm.c

   1 /* packet-itdm.c
   2  * Routines for I-TDM (Internal TDM) dissection
   3  * Compliant to PICMG SFP.0 and SFP.1 March 24, 2005
   4  *
   5  * Copyright 2008, Dan Gora <dg [AT] adax.com>
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1998 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 <epan/tfs.h>
  19 #include <wsutil/array.h>
  20
  21 void proto_register_itdm(void);
  22 void proto_reg_handoff_itdm(void);
  23
  24 /* Initialize the protocol and registered fields */
  25 static int proto_itdm;
  26 static int hf_itdm_timestamp;
  27 static int hf_itdm_seqnum;
  28 static int hf_itdm_sop_eop;
  29 static int hf_itdm_last_pack;
  30 static int hf_itdm_pktlen;
  31 static int hf_itdm_chksum;
  32 static int hf_itdm_uid;
  33 static int hf_itdm_ack;
  34 static int hf_itdm_act;
  35 static int hf_itdm_chcmd;
  36 static int hf_itdm_chid;
  37 static int hf_itdm_chloc1;
  38 static int hf_itdm_chloc2;
  39 static int hf_itdm_pktrate;
  40 static int hf_itdm_cxnsize;
  41
  42 /* I-TDM control protocol fields */
  43 static int hf_itdm_ctl_transid;
  44 static int hf_itdm_ctl_command;
  45 static int hf_itdm_ctl_flowid;
  46 static int hf_itdm_ctl_dm;
  47 static int hf_itdm_ctl_emts;
  48 static int hf_itdm_ctl_pktrate;
  49 static int hf_itdm_ctl_ptid;
  50 static int hf_itdm_ctl_cksum;
  51
  52
  53 /* Initialize the subtree pointers */
  54 static int ett_itdm;
  55 static int ett_itdm_ctl;
  56
  57 static dissector_handle_t itdm_handle;
  58
  59 /* ZZZZ some magic number.. */
  60 static unsigned gbl_ItdmMPLSLabel = 0x99887;
  61 static unsigned gbl_ItdmCTLFlowNo;
  62
  63 /* I-TDM 125usec mode commands for data flows */
  64 #define ITDM_CMD_NEW_CHAN     1
  65 #define ITDM_CMD_CLOSE_CHAN   2
  66 #define ITDM_CMD_RELOC_CHAN   3
  67 #define ITDM_CMD_CYCLIC_REAF  4
  68 #define ITDM_CMD_PACKET_RATE  5
  69
  70 #define ITDM_FLOWID_OFFSET    7
  71 #define ITDM_CHCMD_OFFSET    10
  72 #define ITDM_CHANID_OFFSET   11
  73 #define ITDM_CHLOC1_OFFSET   14
  74 #define ITDM_CHLOC2_OFFSET   16
  75
  76 /* I-TDM commands for I-TDM control flows */
  77 #define ITDM_CTL_TRANSID_OFFSET    10
  78 #define ITDM_CTL_CMD_OFFSET        14
  79 #define ITDM_CTL_FLOWID_OFFSET     15
  80 #define ITDM_CTL_ITDM_MODE_OFFSET  18
  81 #define ITDM_CTL_EMTS_OFFSET       20
  82 #define ITDM_CTL_PKTRATE_OFFSET    22
  83 #define ITDM_CTL_PAIRED_TRANSID_OFFSET    26
  84 #define ITDM_CTL_CRC_OFFSET        30
  85
  86 #define ITDM_CTL_CMD_AFI_REQ  1
  87
  88 static const value_string sop_eop_vals[] = {
  89   { 0x0, "Middle of Packet" },
  90   { 0x1, "End of Packet" },
  91   { 0x2, "Start of Packet" },
  92   { 0x3, "Complete Packet" },
  93   { 0, NULL }
  94 };
  95
  96 static const true_false_string ack_tfs = {
  97   "Acknowledging a command from remote node",
  98   "Normal Command"
  99 };
 100
 101 static const value_string chcmd_vals[] = {
 102   { 0x0, "Reserved" },
 103   { 0x1, "New Channel ID" },
 104   { 0x2, "Close Channel ID" },
 105   { 0x3, "Relocate Channel ID" },
 106   { 0x4, "Cyclic Reaffirmation" },
 107   { 0x5, "Packet Rate Integrity Check" },
 108   { 0x6, "Reserved" },
 109   { 0x7, "Reserved" },
 110   { 0x8, "Reserved" },
 111   { 0x9, "Reserved" },
 112   { 0xa, "Reserved" },
 113   { 0xb, "Reserved" },
 114   { 0xc, "Reserved" },
 115   { 0xd, "Reserved" },
 116   { 0xe, "Reserved" },
 117   { 0xf, "Reserved" },
 118   { 0, NULL }
 119 };
 120
 121 static const value_string itdm_ctl_command_vals[] = {
 122   { 0x0, "Not Used" },
 123   { 0x1, "AFI_REQ: Alloc Flow ID Req" },
 124   { 0x2, "AFI_RSP: Alloc Flow ID Rsp - Req Accepted." },
 125   { 0x3, "DFI_REQ: Dealloc Flow ID Req" },
 126   { 0x4, "DFI_RSP: Dealloc Flow ID Rsp - Req Accepted." },
 127
 128   { 0x10, "AFI_RSP: Reject: Data Mode Field value Not Supported." },
 129   { 0x11, "AFI_RSP: Reject: Explicit Multi-timeslot value Not Supported." },
 130   { 0x12, "AFI_RSP: Reject: Packet Rate value Not Supported." },
 131   { 0x13, "AFI_RSP: Reject: Checksum Invalid." },
 132   { 0x14, "AFI_RSP: Reject: No more flows available." },
 133
 134   { 0x20, "DFI_RSP: Reject: Data Mode Field value does not match Flow ID." },
 135   { 0x21, "DFI_RSP: Reject: Explicit Multi-timeslots value does not match." },
 136   { 0x22, "DFI_RSP: Reject: Packet Rate value does not match." },
 137   { 0x23, "DFI_RSP: Reject: Checksum Invalid." },
 138   { 0x24, "DFI_RSP: Reject: Flow ID invalid (out of range)." },
 139   { 0x25, "DFI_RSP: Reject: Flow ID not currently allocated." },
 140   { 0x26, "DFI_RSP: Reject: Other Flow ID in pair has active connections." },
 141   { 0, NULL }
 142 };
 143
 144 static const value_string itdm_ctl_data_mode_vals[] = {
 145   { 0, "Not Used." },
 146   { 1, "I-TDM 1ms Data Mode." },
 147   { 2, "I-TDM 125usec Data Mode." },
 148   { 3, "I-TDM Explicit Multi-timeslot Data Mode." },
 149   { 4, "I-TDM CAS Signaling Data Mode." },
 150   { 0, NULL }
 151 };
 152
 153 static const value_string itdm_ctl_pktrate_vals[] = {
 154   { 0x447A0000, "I-TDM 1ms Data Mode." },
 155   { 0x45FA0000, "I-TDM 125usec/EMTS Data Mode." },
 156   { 0x43A6AAAB, "I-TDM T1 CAS Mode." },
 157   { 0x43FA0000, "I-TDM E1 CAS Mode." },
 158   { 0, NULL }
 159 };
 160
 161 static void
 162 dissect_itdm_125usec(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 163 {
 164   tvbuff_t  *next_tvb;
 165   proto_item *itdm_item = NULL;
 166   proto_tree *itdm_tree = NULL;
 167   int offset;
 168   uint32_t flowid;
 169   uint32_t chanid;
 170   uint16_t chloc1;
 171   uint16_t chloc2;
 172   uint8_t chcmd;
 173   uint8_t actbit;
 174   uint8_t ackbit;
 175
 176
 177   col_set_str(pinfo->cinfo, COL_PROTOCOL, "ITDM");
 178
 179   flowid = tvb_get_ntoh24(tvb, ITDM_FLOWID_OFFSET);
 180   chanid = tvb_get_ntoh24(tvb, ITDM_CHANID_OFFSET);
 181   chcmd  = tvb_get_uint8(tvb, ITDM_CHCMD_OFFSET);
 182   chloc1 = tvb_get_ntohs(tvb, ITDM_CHLOC1_OFFSET);
 183   actbit = (chcmd & 0x10) ? 1 : 0;
 184   ackbit = (chcmd & 0x20) ? 1 : 0;
 185   chcmd  = chcmd & 0x0f;
 186
 187   col_add_fstr(pinfo->cinfo, COL_INFO,
 188       "Flow %d Chan %d ACT %d ACK %d %s",
 189       flowid, chanid, actbit, ackbit,
 190       val_to_str_const(chcmd, chcmd_vals, "Reserved"));
 191   if (chcmd == ITDM_CMD_NEW_CHAN ||
 192       chcmd == ITDM_CMD_CLOSE_CHAN ||
 193       chcmd == ITDM_CMD_CYCLIC_REAF)
 194   {
 195     col_append_fstr(pinfo->cinfo, COL_INFO,
 196         " Loc1 %d", chloc1);
 197   }
 198   else if (chcmd == ITDM_CMD_RELOC_CHAN)
 199   {
 200     chloc2 = tvb_get_ntohs(tvb, ITDM_CHLOC2_OFFSET);
 201     col_append_fstr(pinfo->cinfo, COL_INFO,
 202       " Loc1 %d Loc2 %d", chloc1, chloc2);
 203   }
 204
 205   offset = 0;
 206
 207   if (tree)
 208   {
 209   itdm_item = proto_tree_add_item(tree, proto_itdm, tvb, 0, -1, ENC_NA);
 210   itdm_tree = proto_item_add_subtree(itdm_item, ett_itdm);
 211
 212   proto_tree_add_item(itdm_tree, hf_itdm_timestamp, tvb, offset, 2, ENC_BIG_ENDIAN);
 213   offset += 2;
 214   proto_tree_add_item(itdm_tree, hf_itdm_seqnum, tvb, offset, 1, ENC_BIG_ENDIAN);
 215   offset += 1;
 216   proto_tree_add_item(itdm_tree, hf_itdm_sop_eop, tvb, offset, 1, ENC_BIG_ENDIAN);
 217   proto_tree_add_item(itdm_tree, hf_itdm_last_pack, tvb, offset, 1, ENC_BIG_ENDIAN);
 218   proto_tree_add_item(itdm_tree, hf_itdm_pktlen, tvb, offset, 2, ENC_BIG_ENDIAN);
 219   offset += 2;
 220   proto_tree_add_checksum(itdm_tree, tvb, offset, hf_itdm_chksum, -1, NULL, pinfo, 0, ENC_BIG_ENDIAN, PROTO_CHECKSUM_NO_FLAGS);
 221   offset += 2;
 222   proto_tree_add_item(itdm_tree, hf_itdm_uid, tvb, offset, 3, ENC_BIG_ENDIAN);
 223   offset += 3;
 224   proto_tree_add_item(itdm_tree, hf_itdm_ack, tvb, offset, 1, ENC_BIG_ENDIAN);
 225   proto_tree_add_item(itdm_tree, hf_itdm_act, tvb, offset, 1, ENC_BIG_ENDIAN);
 226   proto_tree_add_item(itdm_tree, hf_itdm_chcmd, tvb, offset, 1, ENC_BIG_ENDIAN);
 227   offset += 1;
 228   proto_tree_add_item(itdm_tree, hf_itdm_chid, tvb, offset, 3, ENC_BIG_ENDIAN);
 229   offset += 3;
 230   if (chcmd == ITDM_CMD_PACKET_RATE)
 231   {
 232     proto_tree_add_item(itdm_tree, hf_itdm_pktrate, tvb, offset, 4, ENC_BIG_ENDIAN);
 233     offset += 4;
 234   }
 235   else
 236   {
 237     proto_tree_add_item(itdm_tree, hf_itdm_chloc1, tvb, offset, 2, ENC_BIG_ENDIAN);
 238     offset += 2;
 239     if (chcmd == ITDM_CMD_CYCLIC_REAF ||
 240         chcmd == ITDM_CMD_NEW_CHAN ||
 241         chcmd == ITDM_CMD_CLOSE_CHAN)
 242     {
 243       proto_tree_add_item(itdm_tree, hf_itdm_cxnsize, tvb, offset, 2, ENC_BIG_ENDIAN);
 244       offset += 2;
 245     }
 246     else
 247     {
 248       proto_tree_add_item(itdm_tree, hf_itdm_chloc2, tvb, offset, 2, ENC_BIG_ENDIAN);
 249       offset += 2;
 250     }
 251   }
 252   }
 253
 254   next_tvb = tvb_new_subset_remaining(tvb, offset);
 255   call_data_dissector(next_tvb, pinfo, tree);
 256 }
 257
 258 static void
 259 dissect_itdm_control(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 260 {
 261   tvbuff_t  *next_tvb;
 262   proto_item *itdm_ctl_item = NULL;
 263   proto_tree *itdm_ctl_tree = NULL;
 264   int offset;
 265   uint32_t flowid;
 266   uint8_t command;
 267   uint32_t trans_id;
 268   uint32_t paired_trans_id;
 269   uint32_t allocd_flowid;
 270
 271   col_set_str(pinfo->cinfo, COL_PROTOCOL, "ITDM-Control");
 272
 273   flowid = tvb_get_ntoh24(tvb, ITDM_FLOWID_OFFSET);
 274   command = tvb_get_uint8(tvb, ITDM_CTL_CMD_OFFSET);
 275   allocd_flowid = tvb_get_ntoh24(tvb, ITDM_CTL_FLOWID_OFFSET);
 276   trans_id = tvb_get_ntohl(tvb, ITDM_CTL_TRANSID_OFFSET);
 277   paired_trans_id = tvb_get_ntohl(tvb, ITDM_CTL_PAIRED_TRANSID_OFFSET);
 278
 279   col_add_fstr(pinfo->cinfo, COL_INFO,
 280       "Flow %d Command %s ",
 281       flowid, val_to_str_const(command, itdm_ctl_command_vals, "Reserved"));
 282
 283   if (command != ITDM_CTL_CMD_AFI_REQ )
 284   {
 285     col_append_fstr(pinfo->cinfo, COL_INFO,
 286         " Alloc'd FlowID %d", allocd_flowid);
 287   }
 288
 289   col_append_fstr(pinfo->cinfo, COL_INFO, " TransID 0x%x ", trans_id);
 290
 291   if (command != ITDM_CTL_CMD_AFI_REQ )
 292   {
 293     col_append_fstr(pinfo->cinfo, COL_INFO,
 294         " Paired TransID 0x%x", paired_trans_id);
 295   }
 296
 297   offset = 0;
 298
 299   if (tree)
 300   {
 301   itdm_ctl_item = proto_tree_add_item(tree, proto_itdm, tvb, 0, -1, ENC_NA);
 302   itdm_ctl_tree = proto_item_add_subtree(itdm_ctl_item, ett_itdm_ctl);
 303
 304   /* These eventually should go into a SFP.0 dissector... */
 305   proto_tree_add_item(itdm_ctl_tree, hf_itdm_timestamp, tvb, offset, 2, ENC_BIG_ENDIAN);
 306   offset += 2;
 307   proto_tree_add_item(itdm_ctl_tree, hf_itdm_seqnum, tvb, offset, 1, ENC_BIG_ENDIAN);
 308   offset += 1;
 309   proto_tree_add_item(itdm_ctl_tree, hf_itdm_sop_eop, tvb, offset, 1, ENC_BIG_ENDIAN);
 310   proto_tree_add_item(itdm_ctl_tree, hf_itdm_last_pack, tvb, offset, 1, ENC_BIG_ENDIAN);
 311   proto_tree_add_item(itdm_ctl_tree, hf_itdm_pktlen, tvb, offset, 2, ENC_BIG_ENDIAN);
 312   offset += 2;
 313   proto_tree_add_checksum(itdm_ctl_tree, tvb, offset, hf_itdm_chksum, -1, NULL, pinfo, 0, ENC_BIG_ENDIAN, PROTO_CHECKSUM_NO_FLAGS);
 314   offset += 2;
 315   proto_tree_add_item(itdm_ctl_tree, hf_itdm_uid, tvb, offset, 3, ENC_BIG_ENDIAN);
 316   offset += 3;
 317
 318   proto_tree_add_item(itdm_ctl_tree, hf_itdm_ctl_transid, tvb, offset, 4, ENC_BIG_ENDIAN);
 319   offset += 4;
 320
 321   proto_tree_add_item(itdm_ctl_tree, hf_itdm_ctl_command, tvb, offset, 1, ENC_BIG_ENDIAN);
 322   offset += 1;
 323   if (command != ITDM_CTL_CMD_AFI_REQ) {
 324     proto_tree_add_item(itdm_ctl_tree, hf_itdm_ctl_flowid, tvb, offset, 3, ENC_BIG_ENDIAN);
 325   }
 326   offset += 3;
 327   proto_tree_add_item(itdm_ctl_tree, hf_itdm_ctl_dm, tvb, offset, 1, ENC_BIG_ENDIAN);
 328   offset += 1;
 329   /* rsvd.. */
 330   offset += 1;
 331   proto_tree_add_item(itdm_ctl_tree, hf_itdm_ctl_emts, tvb, offset, 2, ENC_BIG_ENDIAN);
 332   offset += 2;
 333   proto_tree_add_item(itdm_ctl_tree, hf_itdm_ctl_pktrate, tvb, offset, 4, ENC_BIG_ENDIAN);
 334   offset += 4;
 335   if (command != ITDM_CTL_CMD_AFI_REQ) {
 336     proto_tree_add_item(itdm_ctl_tree, hf_itdm_ctl_ptid, tvb, offset, 4, ENC_BIG_ENDIAN);
 337   }
 338   offset += 4;
 339   /* rsvd.. */
 340   offset += 2;
 341   proto_tree_add_item(itdm_ctl_tree, hf_itdm_ctl_cksum, tvb, offset, 2, ENC_BIG_ENDIAN);
 342   offset += 2;
 343   }
 344
 345   next_tvb = tvb_new_subset_remaining(tvb, offset);
 346   call_data_dissector(next_tvb, pinfo, tree);
 347 }
 348
 349 static int
 350 dissect_itdm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
 351 {
 352   uint32_t flowid;
 353
 354   /* ZZZ for now, 125 usec mode and I-TDM control protocol
 355    * need to add 1ms mode */
 356   if (tvb_captured_length(tvb) < 18)
 357     return 0;
 358
 359   /* See if this packet is a data flow or the I-TDM control flow. */
 360   flowid = tvb_get_ntoh24(tvb, ITDM_FLOWID_OFFSET);
 361
 362   /* gbl_ItdmCTLFlowNo is the configurable flow number where
 363    * the control protocol resides... Usually 0.
 364    */
 365   if (flowid == gbl_ItdmCTLFlowNo)
 366     dissect_itdm_control(tvb, pinfo, tree);
 367   else
 368     dissect_itdm_125usec(tvb, pinfo, tree);
 369   return tvb_captured_length(tvb);
 370 }
 371
 372 void
 373 proto_register_itdm(void)
 374 {
 375
 376   static hf_register_info hf[] = {
 377     { &hf_itdm_timestamp,{ "Timestamp", "itdm.timestamp",
 378       FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
 379     { &hf_itdm_seqnum,{ "Sequence Number", "itdm.seqnum",
 380       FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
 381     { &hf_itdm_sop_eop,{ "Start/End of Packet", "itdm.sop_eop",
 382       FT_UINT8, BASE_DEC, VALS(sop_eop_vals), 0xc0, NULL, HFILL } },
 383     { &hf_itdm_last_pack,{ "Last Packet", "itdm.last_pack",
 384       FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL } },
 385     { &hf_itdm_pktlen,{ "Packet Length", "itdm.pktlen",
 386       FT_UINT16, BASE_DEC, NULL, 0x07ff, NULL, HFILL } },
 387     { &hf_itdm_chksum,{ "Checksum", "itdm.chksum",
 388       FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
 389     { &hf_itdm_uid,{ "Flow ID", "itdm.uid",
 390       FT_UINT24, BASE_DEC, NULL, 0x0, NULL, HFILL } },
 391     { &hf_itdm_ack,{ "ACK", "itdm.ack",
 392       FT_BOOLEAN, 8, TFS(&ack_tfs), 0x20, NULL, HFILL } },
 393     { &hf_itdm_act,{ "Activate", "itdm.act",
 394       FT_BOOLEAN, 8, NULL, 0x10, NULL, HFILL } },
 395     { &hf_itdm_chcmd,{ "Channel Command", "itdm.chcmd",
 396       FT_UINT8, BASE_DEC, VALS(chcmd_vals), 0x0f, NULL, HFILL } },
 397     { &hf_itdm_chid,{ "Channel ID", "itdm.chid",
 398       FT_UINT24, BASE_DEC, NULL, 0x0, NULL, HFILL } },
 399     { &hf_itdm_chloc1,{ "Channel Location 1", "itdm.chloc1",
 400       FT_UINT16, BASE_DEC, NULL, 0x01ff, NULL, HFILL } },
 401     { &hf_itdm_chloc2,{ "Channel Location 2", "itdm.chloc2",
 402       FT_UINT16, BASE_DEC, NULL, 0x01ff, NULL, HFILL } },
 403     { &hf_itdm_pktrate,{ "IEEE 754 Packet Rate", "itdm.pktrate",
 404        FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
 405     { &hf_itdm_cxnsize, { "Connection Size", "itdm.cxnsize",
 406        FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
 407
 408     { &hf_itdm_ctl_transid, { "Transaction ID", "itdm.ctl_transid",
 409        FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
 410     { &hf_itdm_ctl_command, { "Control Command", "itdm.ctl_cmd",
 411        FT_UINT8, BASE_DEC, VALS(itdm_ctl_command_vals), 0x0, NULL, HFILL } },
 412     { &hf_itdm_ctl_flowid, { "Allocated Flow ID", "itdm.ctl_flowid",
 413        FT_UINT24, BASE_DEC, NULL, 0x0, NULL, HFILL } },
 414     { &hf_itdm_ctl_dm, { "I-TDM Data Mode", "itdm.ctl_dm",
 415        FT_UINT8, BASE_DEC, VALS(itdm_ctl_data_mode_vals), 0x0, NULL, HFILL } },
 416     { &hf_itdm_ctl_emts, { "I-TDM Explicit Multi-timeslot Size", "itdm.ctlemts",
 417        FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
 418     { &hf_itdm_ctl_pktrate, { "I-TDM Packet Rate", "itdm.ctl_pktrate",
 419        FT_UINT32, BASE_HEX, VALS(itdm_ctl_pktrate_vals), 0x0, NULL, HFILL } },
 420     { &hf_itdm_ctl_ptid, { "Paired Transaction ID", "itdm.ctl_ptid",
 421        FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
 422     { &hf_itdm_ctl_cksum, { "ITDM Control Message Checksum", "itdm.ctl_cksum",
 423        FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } }
 424   };
 425
 426   static int *ett[] = {
 427     &ett_itdm,
 428     &ett_itdm_ctl
 429   };
 430
 431   module_t *itdm_module;
 432
 433   proto_itdm = proto_register_protocol("Internal TDM", "ITDM", "itdm");
 434   itdm_handle = register_dissector("itdm", dissect_itdm, proto_itdm);
 435
 436   proto_register_field_array(proto_itdm, hf, array_length(hf));
 437   proto_register_subtree_array(ett, array_length(ett));
 438
 439   itdm_module = prefs_register_protocol(proto_itdm, proto_reg_handoff_itdm);
 440
 441   prefs_register_uint_preference(itdm_module, "mpls_label",
 442     "ITDM MPLS label (Flow Bundle ID in hex)",
 443     "The MPLS label (aka Flow Bundle ID) used by ITDM traffic.",
 444     16, &gbl_ItdmMPLSLabel);
 445
 446   prefs_register_uint_preference(itdm_module, "ctl_flowno",
 447     "I-TDM Control Protocol Flow Number",
 448     "Flow Number used by I-TDM Control Protocol traffic.",
 449     10, &gbl_ItdmCTLFlowNo);
 450 }
 451
 452 void
 453 proto_reg_handoff_itdm(void)
 454 {
 455   static bool Initialized=false;
 456   static unsigned ItdmMPLSLabel;
 457
 458   if (!Initialized) {
 459     Initialized=true;
 460   } else {
 461     dissector_delete_uint("mpls.label", ItdmMPLSLabel, itdm_handle);
 462   }
 463
 464   ItdmMPLSLabel = gbl_ItdmMPLSLabel;
 465   dissector_add_uint("mpls.label", gbl_ItdmMPLSLabel, itdm_handle);
 466 }
 467
 468 /*
 469  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 470  *
 471  * Local Variables:
 472  * c-basic-offset: 2
 473  * tab-width: 8
 474  * indent-tabs-mode: nil
 475  * End:
 476  *
 477  * ex: set shiftwidth=2 tabstop=8 expandtab:
 478  * :indentSize=2:tabSize=8:noTabs=true:
 479  */