packet-fc.c

   1 /* packet-fc.c
   2  * Routines for Fibre Channel Decoding (FC Header, Link Ctl & Basic Link Svc)
   3  * Copyright 2001, Dinesh G Dutt <ddutt@cisco.com>
   4  *   Copyright 2003  Ronnie Sahlberg, exchange first/last matching and
   5  *                                    tap listener and misc updates
   6  *
   7  * $Id: packet-fc.c,v 1.10 2003/06/25 10:21:44 sahlberg Exp $
   8  *
   9  * Ethereal - Network traffic analyzer
  10  * By Gerald Combs <gerald@ethereal.com>
  11  * Copyright 1998 Gerald Combs
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version 2
  16  * of the License, or (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26  */
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30
  31 #endif
  32
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36
  37 #ifdef HAVE_SYS_TYPES_H
  38 # include <sys/types.h>
  39 #endif
  40
  41 #ifdef HAVE_NETINET_IN_H
  42 # include <netinet/in.h>
  43 #endif
  44
  45 #include <glib.h>
  46
  47 #ifdef NEED_SNPRINTF_H
  48 # include "snprintf.h"
  49 #endif
  50
  51 #include <epan/packet.h>
  52 #include "prefs.h"
  53 #include "reassemble.h"
  54 #include "etypes.h"
  55 #include "packet-fc.h"
  56 #include "packet-fclctl.h"
  57 #include "packet-fcbls.h"
  58 #include "tap.h"
  59
  60 #define FC_HEADER_SIZE         24
  61 #define FC_RCTL_EISL           0x50
  62 #define MDSHDR_TRAILER_SIZE    6
  63
  64 /* Size of various fields in FC header in bytes */
  65 #define FC_RCTL_SIZE           1
  66 #define FC_DID_SIZE            3
  67 #define FC_CSCTL_SIZE          1
  68 #define FC_SID_SIZE            3
  69 #define FC_TYPE_SIZE           1
  70 #define FC_FCTL_SIZE           3
  71 #define FC_SEQID_SIZE          1
  72 #define FC_DFCTL_SIZE          1
  73 #define FC_SEQCNT_SIZE         2
  74 #define FC_OXID_SIZE           2
  75 #define FC_RXID_SIZE           2
  76 #define FC_PARAM_SIZE          4
  77
  78 /* Initialize the protocol and registered fields */
  79 static int proto_fc = -1;
  80 static int hf_fc_time = -1;
  81 static int hf_fc_exchange_first_frame = -1;
  82 static int hf_fc_exchange_last_frame = -1;
  83 static int hf_fc_rctl = -1;
  84 static int hf_fc_did = -1;
  85 static int hf_fc_csctl = -1;
  86 static int hf_fc_sid = -1;
  87 static int hf_fc_id = -1;
  88 static int hf_fc_type = -1;
  89 static int hf_fc_fctl = -1;
  90 static int hf_fc_fctl_exchange_responder = -1;
  91 static int hf_fc_fctl_seq_recipient = -1;
  92 static int hf_fc_fctl_exchange_first = -1;
  93 static int hf_fc_fctl_exchange_last = -1;
  94 static int hf_fc_fctl_seq_last = -1;
  95 static int hf_fc_fctl_priority = -1;
  96 static int hf_fc_fctl_transfer_seq_initiative = -1;
  97 static int hf_fc_fctl_rexmitted_seq = -1;
  98 static int hf_fc_fctl_rel_offset = -1;
  99 static int hf_fc_fctl_abts_ack = -1;
 100 static int hf_fc_fctl_abts_not_ack = -1;
 101 static int hf_fc_fctl_last_data_frame = -1;
 102 static int hf_fc_fctl_ack_0_1 = -1;
 103 static int hf_fc_seqid = -1;
 104 static int hf_fc_dfctl = -1;
 105 static int hf_fc_seqcnt = -1;
 106 static int hf_fc_oxid = -1;
 107 static int hf_fc_rxid = -1;
 108 static int hf_fc_param = -1;
 109 static int hf_fc_ftype = -1;    /* Derived field, non-existent in FC hdr */
 110 static int hf_fc_reassembled = -1;
 111
 112 /* Network_Header fields */
 113 static int hf_fc_nh_da = -1;
 114 static int hf_fc_nh_sa = -1;
 115
 116 /* For Basic Link Svc */
 117 static int hf_fc_bls_seqid_vld = -1;
 118 static int hf_fc_bls_lastvld_seqid = -1;
 119 static int hf_fc_bls_oxid = -1;
 120 static int hf_fc_bls_rxid = -1;
 121 static int hf_fc_bls_lowseqcnt = -1;
 122 static int hf_fc_bls_hiseqcnt = -1;
 123 static int hf_fc_bls_rjtcode = -1;
 124 static int hf_fc_bls_rjtdetail = -1;
 125 static int hf_fc_bls_vendor = -1;
 126
 127
 128 /* Initialize the subtree pointers */
 129 static gint ett_fc = -1;
 130 static gint ett_fctl = -1;
 131 static gint ett_fcbls = -1;
 132
 133 static dissector_table_t fcftype_dissector_table;
 134 static dissector_handle_t data_handle;
 135
 136 static int fc_tap = -1;
 137
 138 /* Reassembly stuff */
 139 static gboolean fc_reassemble = TRUE;
 140 static guint32  fc_max_frame_size = 1024;
 141 static GHashTable *fc_fragment_table = NULL;
 142
 143
 144 static GHashTable *fc_exchange_unmatched = NULL;
 145 static GHashTable *fc_exchange_matched = NULL;
 146 static GMemChunk *fc_exchange_vals = NULL;
 147 static guint32 fc_exchange_init_count = 200;
 148
 149 static guint
 150 fc_exchange_hash_unmatched(gconstpointer v)
 151 {
 152     const fc_exchange_data *fced=(const fc_exchange_data *)v;
 153
 154     return fced->oxid;
 155 }
 156 static gint
 157 fc_exchange_equal_unmatched(gconstpointer v1, gconstpointer v2)
 158 {
 159     const fc_exchange_data *fced1=(const fc_exchange_data *)v1;
 160     const fc_exchange_data *fced2=(const fc_exchange_data *)v2;
 161
 162     /* oxid must match */
 163     if(fced1->oxid!=fced2->oxid){
 164         return 0;
 165     }
 166     /* compare s_id, d_id and treat the fc address
 167        s_id==00.00.00 as a wildcard matching anything */
 168     if( (fced1->s_id!=0) && (fced1->s_id!=fced2->s_id) ){
 169         return 0;
 170     }
 171     if(fced1->d_id!=fced2->d_id){
 172         return 0;
 173     }
 174
 175     return 1;
 176 }
 177
 178 static guint
 179 fc_exchange_hash_matched(gconstpointer v)
 180 {
 181     const fc_exchange_data *fced=(const fc_exchange_data *)v;
 182
 183     return fced->oxid;
 184 }
 185 static gint
 186 fc_exchange_equal_matched(gconstpointer v1, gconstpointer v2)
 187 {
 188     const fc_exchange_data *fced1=(const fc_exchange_data *)v1;
 189     const fc_exchange_data *fced2=(const fc_exchange_data *)v2;
 190     guint32 fef1, fef2, lef1, lef2;
 191
 192     /* oxid must match */
 193     if(fced1->oxid!=fced2->oxid){
 194         return 0;
 195     }
 196     fef1=fced1->first_exchange_frame;
 197     fef2=fced2->first_exchange_frame;
 198     lef1=fced1->last_exchange_frame;
 199     lef2=fced2->last_exchange_frame;
 200     if(!fef1)fef1=fef2;
 201     if(!fef2)fef2=fef1;
 202     if(!lef1)lef1=lef2;
 203     if(!lef2)lef2=lef1;
 204
 205     if(fef1!=fef2){
 206         return 0;
 207     }
 208     if(lef1!=lef2){
 209         return 0;
 210     }
 211
 212     return 1;
 213 }
 214
 215 static void
 216 fc_exchange_init_protocol(void)
 217 {
 218     if(fc_exchange_vals){
 219         g_mem_chunk_destroy(fc_exchange_vals);
 220         fc_exchange_vals=NULL;
 221     }
 222     if(fc_exchange_unmatched){
 223         g_hash_table_destroy(fc_exchange_unmatched);
 224         fc_exchange_unmatched=NULL;
 225     }
 226     if(fc_exchange_matched){
 227         g_hash_table_destroy(fc_exchange_matched);
 228         fc_exchange_matched=NULL;
 229     }
 230
 231     fc_exchange_unmatched=g_hash_table_new(fc_exchange_hash_unmatched, fc_exchange_equal_unmatched);
 232     fc_exchange_matched=g_hash_table_new(fc_exchange_hash_matched, fc_exchange_equal_matched);
 233     fc_exchange_vals=g_mem_chunk_new("fc_exchange_vals", sizeof(fc_exchange_data), fc_exchange_init_count*sizeof(fc_exchange_data), G_ALLOC_AND_FREE);
 234 }
 235
 236
 237
 238
 239
 240
 241 const value_string fc_fc4_val[] = {
 242     {FC_TYPE_ELS     , "Ext Link Svc"},
 243     {FC_TYPE_LLCSNAP , "LLC_SNAP"},
 244     {FC_TYPE_IP      , "IP/FC"},
 245     {FC_TYPE_SCSI    , "FCP"},
 246     {FC_TYPE_FCCT    , "FC_CT"},
 247     {FC_TYPE_SWILS   , "SW_ILS"},
 248     {FC_TYPE_AL      , "AL"},
 249     {FC_TYPE_SNMP    , "SNMP"},
 250     {0, NULL},
 251 };
 252
 253 static const value_string fc_ftype_vals [] = {
 254     {FC_FTYPE_UNDEF ,    "Unknown frame"},
 255     {FC_FTYPE_SWILS,     "SW_ILS"},
 256     {FC_FTYPE_IP ,       "IP/FC"},
 257     {FC_FTYPE_SCSI ,     "FCP"},
 258     {FC_FTYPE_BLS ,      "Basic Link Svc"},
 259     {FC_FTYPE_ELS ,      "ELS"},
 260     {FC_FTYPE_FCCT ,     "FC_CT"},
 261     {FC_FTYPE_LINKDATA,  "Link Data"},
 262     {FC_FTYPE_VDO,       "Video Data"},
 263     {FC_FTYPE_LINKCTL,   "Link Ctl"},
 264     {0, NULL},
 265 };
 266
 267 static const value_string fc_wka_vals[] = {
 268     {FC_WKA_MULTICAST,    "Multicast Server"},
 269     {FC_WKA_CLKSYNC,      "Clock Sync Server"},
 270     {FC_WKA_KEYDIST,      "Key Distribution Server"},
 271     {FC_WKA_ALIAS,        "Alias Server"},
 272     {FC_WKA_QOSF,         "QoS Facilitator"},
 273     {FC_WKA_MGMT,         "Management Server"},
 274     {FC_WKA_TIME,         "Time Server"},
 275     {FC_WKA_DNS,          "Directory Server"},
 276     {FC_WKA_FABRIC_CTRLR, "Fabric Ctlr"},
 277     {FC_WKA_FPORT,        "F_Port Server"},
 278     {FC_WKA_BCAST,        "Broadcast ID"},
 279     {0, NULL},
 280 };
 281
 282 static const value_string fc_iu_val[] = {
 283     {FC_IU_UNCATEGORIZED   , "Uncategorized Data"},
 284     {FC_IU_SOLICITED_DATA  , "Solicited Data"},
 285     {FC_IU_UNSOLICITED_CTL , "Unsolicited Control"},
 286     {FC_IU_SOLICITED_CTL   , "Solicited Control"},
 287     {FC_IU_UNSOLICITED_DATA, "Solicited Data"},
 288     {FC_IU_DATA_DESCRIPTOR , "Data Descriptor"},
 289     {FC_IU_UNSOLICITED_CMD , "Unsolicited Command"},
 290     {FC_IU_CMD_STATUS      , "Command Status"},
 291     {0, NULL},
 292 };
 293
 294
 295 static void fc_defragment_init(void)
 296 {
 297   fragment_table_init(&fc_fragment_table);
 298 }
 299
 300
 301 static gchar *
 302 fctl_to_str (const guint8 *fctl, gchar *str, gboolean is_ack)
 303 {
 304     int stroff = 0;
 305     guint8 tmp = 0;
 306
 307     if (str == NULL)
 308         return (str);
 309
 310     if (fctl[0] & 0x80) {
 311         strcpy (str, "Exchange Responder, ");
 312         stroff += 20;
 313     }
 314     else {
 315         strcpy (str, "Exchange Originator, ");
 316         stroff += 21;
 317     }
 318
 319     if (fctl[0] & 0x40) {
 320         strcpy (&str[stroff], "Seq Recipient, ");
 321         stroff += 15;
 322     }
 323     else {
 324         strcpy (&str[stroff], "Seq Initiator, ");
 325         stroff += 15;
 326     }
 327
 328     if (fctl[0] & 0x20) {
 329         strcpy (&str[stroff], "Exchg First, ");
 330         stroff += 13;
 331     }
 332
 333     if (fctl[0] & 0x10) {
 334         strcpy (&str[stroff], "Exchg Last, ");
 335         stroff += 12;
 336     }
 337
 338     if (fctl[0] & 0x8) {
 339         strcpy (&str[stroff], "Seq Last, ");
 340         stroff += 10;
 341     }
 342
 343     if (fctl[0] & 0x2) {
 344         strcpy (&str[stroff], "Priority, ");
 345         stroff += 10;
 346     }
 347     else {
 348         strcpy (&str[stroff], "CS_CTL, ");
 349         stroff += 8;
 350     }
 351
 352     if (fctl[0] & 0x1) {
 353         strcpy (&str[stroff], "Transfer Seq Initiative, ");
 354         stroff += 25;
 355     }
 356
 357     if (fctl[1] & 0x30) {
 358         strcpy (&str[stroff], "ACK_0 Reqd, ");
 359         stroff += 12;
 360     }
 361     else if (fctl[1] & 0x10) {
 362         strcpy (&str[stroff], "ACK_1 Reqd, ");
 363         stroff += 12;
 364     }
 365
 366     if (fctl[1] & 0x2) {
 367         strcpy (&str[stroff], "Rexmitted Seq, ");
 368         stroff += 15;
 369     }
 370
 371     tmp = fctl[2] & 0xC0;
 372     switch (tmp) {
 373     case 0:
 374         strcpy (&str[stroff], "Last Data Frame - No Info, ");
 375         stroff += 27;
 376         break;
 377     case 1:
 378         strcpy (&str[stroff], "Last Data Frame - Seq Imm, ");
 379         stroff += 27;
 380         break;
 381     case 2:
 382         strcpy (&str[stroff], "Last Data Frame - Seq Soon, ");
 383         stroff += 28;
 384         break;
 385     case 3:
 386         strcpy (&str[stroff], "Last Data Frame - Seq Delyd, ");
 387         stroff += 29;
 388         break;
 389     }
 390
 391     tmp = fctl[2] & 0x30;
 392     switch (tmp) {
 393     case 0:
 394         if (is_ack) {
 395             strcpy (&str[stroff], "ABTS - Cont, ");
 396             stroff += 13;
 397         }
 398         else {
 399             strcpy (&str[stroff], "ABTS - Abort/MS, ");
 400             stroff += 17;
 401         }
 402         break;
 403     case 0x10:
 404         if (is_ack) {
 405             strcpy (&str[stroff], "ABTS - AbortABTS - Abort, ");
 406             stroff += 14;
 407         }
 408         else {
 409             strcpy (&str[stroff], "ABTS - Abort/SS, ");
 410             stroff += 17;
 411         }
 412         break;
 413     case 0x20:
 414         if (is_ack) {
 415             strcpy (&str[stroff], "ABTS - Stop, ");
 416             stroff += 13;
 417         }
 418         else {
 419             strcpy (&str[stroff], "ABTS - Process/IB, ");
 420             stroff += 19;
 421         }
 422         break;
 423     case 0x30:
 424         if (is_ack) {
 425             strcpy (&str[stroff], "ABTS - Imm Seq Retx, ");
 426             stroff += 21;
 427         }
 428         else {
 429             strcpy (&str[stroff], "ABTS - Discard/MS/Imm Retx, ");
 430             stroff += 28;
 431         }
 432         break;
 433     }
 434
 435     if (fctl[2] & 0x8) {
 436         strcpy (&str[stroff], "Rel Offset = 1");
 437         stroff += 14;
 438     }
 439
 440     return (str);
 441 }
 442
 443 /* BA_ACC & BA_RJT are decoded in this file itself instead of a traditional
 444  * dedicated file and dissector format because the dissector would require some
 445  * fields of the FC_HDR such as param in some cases, type in some others, the
 446  * lower 4 bits of r_ctl in some other cases etc. So, we decode BLS & Link Ctl
 447  * in this file itself.
 448  */
 449 static void
 450 dissect_fc_ba_acc (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 451 {
 452     /* Set up structures needed to add the protocol subtree and manage it */
 453     proto_item *ti;
 454     proto_tree *acc_tree;
 455     int offset = 0;
 456
 457     /* Make entries in Protocol column and Info column on summary display */
 458     if (check_col(pinfo->cinfo, COL_PROTOCOL))
 459         col_set_str(pinfo->cinfo, COL_PROTOCOL, "BLS");
 460
 461     if (check_col(pinfo->cinfo, COL_INFO))
 462         col_set_str(pinfo->cinfo, COL_INFO, "BA_ACC");
 463
 464     if (tree) {
 465         ti = proto_tree_add_text (tree, tvb, 0, tvb_length (tvb), "Basic Link Svc");
 466         acc_tree = proto_item_add_subtree (ti, ett_fcbls);
 467
 468         proto_tree_add_item (acc_tree, hf_fc_bls_seqid_vld, tvb, offset++, 1, FALSE);
 469         proto_tree_add_item (acc_tree, hf_fc_bls_lastvld_seqid, tvb, offset++, 1, FALSE);
 470         offset += 2; /* Skip reserved field */
 471         proto_tree_add_item (acc_tree, hf_fc_bls_oxid, tvb, offset, 2, FALSE);
 472         offset += 2;
 473         proto_tree_add_item (acc_tree, hf_fc_bls_rxid, tvb, offset, 2, FALSE);
 474         offset += 2;
 475         proto_tree_add_item (acc_tree, hf_fc_bls_lowseqcnt, tvb, offset, 2, FALSE);
 476         offset += 2;
 477         proto_tree_add_item (acc_tree, hf_fc_bls_hiseqcnt, tvb, offset, 2, FALSE);
 478     }
 479 }
 480
 481 static void
 482 dissect_fc_ba_rjt (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 483 {
 484     /* Set up structures needed to add the protocol subtree and manage it */
 485     proto_item *ti;
 486     proto_tree *rjt_tree;
 487     int offset = 0;
 488
 489     /* Make entries in Protocol column and Info column on summary display */
 490     if (check_col(pinfo->cinfo, COL_PROTOCOL))
 491         col_set_str(pinfo->cinfo, COL_PROTOCOL, "BLS");
 492
 493     if (check_col(pinfo->cinfo, COL_INFO))
 494         col_set_str(pinfo->cinfo, COL_INFO, "BA_RJT");
 495
 496     if (tree) {
 497         ti = proto_tree_add_text (tree, tvb, 0, tvb_length (tvb), "Basic Link Svc");
 498         rjt_tree = proto_item_add_subtree (ti, ett_fcbls);
 499
 500         proto_tree_add_item (rjt_tree, hf_fc_bls_rjtcode, tvb, offset+1, 1, FALSE);
 501         proto_tree_add_item (rjt_tree, hf_fc_bls_rjtdetail, tvb, offset+2, 1, FALSE);
 502         proto_tree_add_item (rjt_tree, hf_fc_bls_vendor, tvb, offset+3, 1, FALSE);
 503     }
 504 }
 505
 506 static guint8
 507 fc_get_ftype (guint8 r_ctl, guint8 type)
 508 {
 509     /* A simple attempt to determine the upper level protocol based on the
 510      * r_ctl & type fields.
 511      */
 512     switch (r_ctl & 0xF0) {
 513     case FC_RCTL_DEV_DATA:
 514         switch (type) {
 515         case FC_TYPE_SWILS:
 516             if ((r_ctl == 0x2) || (r_ctl == 0x3))
 517                 return FC_FTYPE_SWILS;
 518             else
 519                 return FC_FTYPE_UNDEF;
 520         case FC_TYPE_IP:
 521             return FC_FTYPE_IP;
 522         case FC_TYPE_SCSI:
 523             return FC_FTYPE_SCSI;
 524         case FC_TYPE_FCCT:
 525             return FC_FTYPE_FCCT;
 526         default:
 527             return FC_FTYPE_UNDEF;
 528         }
 529         break;
 530     case FC_RCTL_ELS:
 531         if (((r_ctl & 0x0F) == 0x2) || ((r_ctl & 0x0F) == 0x3))
 532             return FC_FTYPE_ELS;
 533         else
 534             return FC_FTYPE_UNDEF;
 535         break;
 536     case FC_RCTL_LINK_DATA:
 537         return FC_FTYPE_LINKDATA;
 538         break;
 539     case FC_RCTL_VIDEO:
 540         return FC_FTYPE_VDO;
 541         break;
 542     case FC_RCTL_BLS:
 543         if (type == 0)
 544             return FC_FTYPE_BLS;
 545         else
 546             return FC_FTYPE_UNDEF;
 547         break;
 548     case FC_RCTL_LINK_CTL:
 549         return FC_FTYPE_LINKCTL;
 550         break;
 551     default:
 552         return FC_FTYPE_UNDEF;
 553         break;
 554     }
 555 }
 556
 557 static const value_string abts_ack_vals[] = {
 558         {0x000000,      "ABTS - Cont"},
 559         {0x000010,      "ABTS - Abort"},
 560         {0x000020,      "ABTS - Stop"},
 561         {0x000030,      "ABTS - Imm Seq Retx"},
 562         {0,NULL}
 563 };
 564 static const value_string abts_not_ack_vals[] = {
 565         {0x000000,      "ABTS - Abort/MS"},
 566         {0x000010,      "ABTS - Abort/SS"},
 567         {0x000020,      "ABTS - Process/IB"},
 568         {0x000030,      "ABTS - Discard/MS/Imm Retx"},
 569         {0,NULL}
 570 };
 571 static const value_string last_data_frame_vals[] = {
 572         {0x000000,      "Last Data Frame - No Info"},
 573         {0x004000,      "Last Data Frame - Seq Imm"},
 574         {0x008000,      "Last Data Frame - Seq Soon"},
 575         {0x00c000,      "Last Data Frame - Seq Delyd"},
 576         {0,NULL}
 577 };
 578 static const value_string ack_0_1_vals[] = {
 579         {0x003000,      "ACK_0 Required"},
 580         {0x002000,      "ACK_0 Required"},
 581         {0x001000,      "ACK_1 Required"},
 582         {0x000000,      "no ack required"},
 583         {0,NULL}
 584 };
 585 static const true_false_string tfs_fc_fctl_exchange_responder = {
 586         "Exchange Responder",
 587         "Exchange Originator"
 588 };
 589 static const true_false_string tfs_fc_fctl_seq_recipient = {
 590         "Seq Recipient",
 591         "Seq Initiator"
 592 };
 593 static const true_false_string tfs_fc_fctl_exchange_first = {
 594         "Exchg First",
 595         "NOT exchg first"
 596 };
 597 static const true_false_string tfs_fc_fctl_exchange_last = {
 598         "Exchg Last",
 599         "NOT exchg last"
 600 };
 601 static const true_false_string tfs_fc_fctl_seq_last = {
 602         "Seq Last",
 603         "NOT seq last"
 604 };
 605 static const true_false_string tfs_fc_fctl_priority = {
 606         "Priority",
 607         "CS_CTL"
 608 };
 609 static const true_false_string tfs_fc_fctl_transfer_seq_initiative = {
 610         "Transfer Seq Initiative",
 611         "NOT transfer seq initiative"
 612 };
 613 static const true_false_string tfs_fc_fctl_rexmitted_seq = {
 614         "Retransmitted Sequence",
 615         "NOT retransmitted sequence"
 616 };
 617 static const true_false_string tfs_fc_fctl_rel_offset = {
 618         "Rel Offset SET",
 619         "rel offset NOT set"
 620 };
 621
 622
 623
 624
 625 /* code to dissect the  F_CTL bitmask */
 626 static void
 627 dissect_fc_fctl(packet_info *pinfo _U_, proto_tree *parent_tree, tvbuff_t *tvb, int offset, gboolean is_ack, guint32 fctl)
 628 {
 629         proto_item *item;
 630         proto_tree *tree;
 631         gchar str[256];
 632
 633         item=proto_tree_add_uint(parent_tree, hf_fc_fctl, tvb, offset, 3, fctl);
 634         tree=proto_item_add_subtree(item, ett_fctl);
 635
 636
 637         proto_tree_add_boolean(tree, hf_fc_fctl_exchange_responder, tvb, offset, 3, fctl);
 638
 639         proto_tree_add_boolean(tree, hf_fc_fctl_seq_recipient, tvb, offset, 3, fctl);
 640
 641         proto_tree_add_boolean(tree, hf_fc_fctl_exchange_first, tvb, offset, 3, fctl);
 642
 643         proto_tree_add_boolean(tree, hf_fc_fctl_exchange_last, tvb, offset, 3, fctl);
 644
 645         proto_tree_add_boolean(tree, hf_fc_fctl_seq_last, tvb, offset, 3, fctl);
 646
 647         proto_tree_add_boolean(tree, hf_fc_fctl_priority, tvb, offset, 3, fctl);
 648
 649         proto_tree_add_boolean(tree, hf_fc_fctl_transfer_seq_initiative, tvb, offset, 3, fctl);
 650
 651         proto_tree_add_uint(tree, hf_fc_fctl_last_data_frame, tvb, offset, 3, fctl);
 652
 653         proto_tree_add_uint(tree, hf_fc_fctl_ack_0_1, tvb, offset, 3, fctl);
 654
 655
 656         proto_tree_add_boolean(tree, hf_fc_fctl_rexmitted_seq, tvb, offset, 3, fctl);
 657
 658         if(is_ack){
 659                 proto_tree_add_uint(tree, hf_fc_fctl_abts_ack, tvb, offset, 3, fctl);
 660         } else {
 661                 proto_tree_add_uint(tree, hf_fc_fctl_abts_ack, tvb, offset, 3, fctl);
 662         }
 663
 664         proto_tree_add_boolean(tree, hf_fc_fctl_rel_offset, tvb, offset, 3, fctl);
 665
 666         fctl_to_str( ((guint8 *)&fctl)+1, str, is_ack);
 667         proto_item_append_text(item, "  %s", str);
 668 }
 669
 670
 671 /* Code to actually dissect the packets */
 672 static void
 673 dissect_fc (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 674 {
 675    /* Set up structures needed to add the protocol subtree and manage it */
 676     proto_item *ti=NULL;
 677     proto_tree *fc_tree = NULL;
 678     tvbuff_t *next_tvb;
 679     int offset = 0, next_offset;
 680     gboolean is_lastframe_inseq;
 681     gboolean is_exchg_resp = 0;
 682     fragment_data *fcfrag_head;
 683     guint32 frag_id;
 684     guint32 frag_size;
 685     guint8 df_ctl;
 686
 687     guint32 param;
 688     guint8 ftype;
 689     gboolean is_ack;
 690
 691     fc_hdr fchdr;
 692     fc_exchange_data *fc_ex=NULL;
 693
 694     fchdr.fced=NULL;
 695
 696     /* Make entries in Protocol column and Info column on summary display */
 697     if (check_col(pinfo->cinfo, COL_PROTOCOL))
 698         col_set_str(pinfo->cinfo, COL_PROTOCOL, "FC");
 699
 700     fchdr.r_ctl = tvb_get_guint8 (tvb, offset);
 701
 702     /* If the R_CTL is the EISL field, skip the first 8 bytes to retrieve the
 703      * real FC header. EISL is Cisco-proprietary and is not decoded.
 704      */
 705     if (fchdr.r_ctl == FC_RCTL_EISL) {
 706         offset += 8;
 707         fchdr.r_ctl = tvb_get_guint8 (tvb, offset);
 708     }
 709
 710     fchdr.d_id=tvb_get_letoh24(tvb, offset+1);
 711     fchdr.s_id=tvb_get_letoh24(tvb, offset+5);
 712     fchdr.cs_ctl = tvb_get_guint8 (tvb, offset+4);
 713     fchdr.type  = tvb_get_guint8 (tvb, offset+8);
 714     fchdr.fctl=tvb_get_ntoh24(tvb,offset+9);
 715     fchdr.seqcnt = tvb_get_ntohs (tvb, offset+14);
 716     fchdr.oxid=tvb_get_ntohs(tvb,offset+16);
 717     fchdr.rxid=tvb_get_ntohs(tvb,offset+18);
 718     param = tvb_get_ntohl (tvb, offset+20);
 719
 720     SET_ADDRESS (&pinfo->dst, AT_FC, 3, tvb_get_ptr(tvb,offset+1,3));
 721     SET_ADDRESS (&pinfo->src, AT_FC, 3, tvb_get_ptr(tvb,offset+5,3));
 722     pinfo->oxid = fchdr.oxid;
 723     pinfo->rxid = fchdr.rxid;
 724     pinfo->ptype = PT_EXCHG;
 725     pinfo->r_ctl = fchdr.r_ctl;
 726
 727     is_ack = ((fchdr.r_ctl == 0xC0) || (fchdr.r_ctl == 0xC1));
 728
 729     ftype = fc_get_ftype (fchdr.r_ctl, fchdr.type);
 730
 731     if (check_col (pinfo->cinfo, COL_INFO)) {
 732         col_add_str (pinfo->cinfo, COL_INFO, match_strval (ftype, fc_ftype_vals));
 733
 734         if (ftype == FC_FTYPE_LINKCTL)
 735             col_append_fstr (pinfo->cinfo, COL_INFO, ", %s",
 736                              match_strval ((fchdr.r_ctl & 0x0F),
 737                                            fc_lctl_proto_val));
 738     }
 739
 740     /* In the interest of speed, if "tree" is NULL, don't do any work not
 741        necessary to generate protocol tree items. */
 742     if (tree) {
 743         ti = proto_tree_add_protocol_format (tree, proto_fc, tvb, offset,
 744                                              FC_HEADER_SIZE, "Fibre Channel");
 745         fc_tree = proto_item_add_subtree (ti, ett_fc);
 746     }
 747
 748     /* match first exchange with last exchange */
 749     if(fchdr.fctl&FC_FCTL_EXCHANGE_FIRST){
 750         if(!pinfo->fd->flags.visited){
 751             fc_exchange_data fced, *old_fced;
 752             /* first check if we already have seen this exchange and it
 753                is still open/unmatched.
 754             */
 755             fced.oxid=fchdr.oxid;
 756             fced.s_id=fchdr.s_id;
 757             fced.d_id=fchdr.d_id;
 758             old_fced=g_hash_table_lookup(fc_exchange_unmatched, &fced);
 759             if(old_fced){
 760                 g_hash_table_remove(fc_exchange_unmatched, old_fced);
 761             }
 762             old_fced=g_mem_chunk_alloc(fc_exchange_vals);
 763             old_fced->oxid=fchdr.oxid;
 764             old_fced->s_id=fchdr.s_id;
 765             old_fced->d_id=fchdr.d_id;
 766 old_fced->first_exchange_frame=pinfo->fd->num;
 767             old_fced->fc_time.nsecs = pinfo->fd->abs_usecs*1000;
 768             old_fced->fc_time.secs = pinfo->fd->abs_secs;
 769             g_hash_table_insert(fc_exchange_unmatched, old_fced, old_fced);
 770         } else {
 771             fc_exchange_data fced, *old_fced;
 772             fced.oxid=fchdr.oxid;
 773             fced.first_exchange_frame=pinfo->fd->num;
 774             fced.last_exchange_frame=0;
 775             old_fced=g_hash_table_lookup(fc_exchange_matched, &fced);
 776             if(old_fced){
 777                 fc_ex=old_fced;
 778             }
 779         }
 780     }
 781     if(fchdr.fctl&FC_FCTL_EXCHANGE_LAST){
 782         if(!pinfo->fd->flags.visited){
 783             fc_exchange_data fced, *old_fced;
 784
 785             fced.oxid=fchdr.oxid;
 786             fced.s_id=fchdr.d_id;
 787             fced.d_id=fchdr.s_id;
 788             old_fced=g_hash_table_lookup(fc_exchange_unmatched, &fced);
 789             if(old_fced){
 790                 g_hash_table_remove(fc_exchange_unmatched, old_fced);
 791                 old_fced->last_exchange_frame=pinfo->fd->num;
 792                 g_hash_table_insert(fc_exchange_matched, old_fced, old_fced);
 793             }
 794         } else {
 795             fc_exchange_data fced, *old_fced;
 796             fced.oxid=fchdr.oxid;
 797             fced.first_exchange_frame=0;
 798             fced.last_exchange_frame=pinfo->fd->num;
 799             old_fced=g_hash_table_lookup(fc_exchange_matched, &fced);
 800             if(old_fced){
 801                 fc_ex=old_fced;
 802             }
 803         }
 804     }
 805     if(fc_ex){
 806         if(fchdr.fctl&FC_FCTL_EXCHANGE_FIRST){
 807             proto_tree_add_uint(fc_tree, hf_fc_exchange_last_frame, tvb, 0, 0, fc_ex->last_exchange_frame);
 808         }
 809         if(fchdr.fctl&FC_FCTL_EXCHANGE_LAST){
 810             nstime_t delta_time;
 811             proto_tree_add_uint(fc_tree, hf_fc_exchange_first_frame, tvb, 0, 0, fc_ex->first_exchange_frame);
 812             delta_time.secs = pinfo->fd->abs_secs - fc_ex->fc_time.secs;
 813             delta_time.nsecs = pinfo->fd->abs_usecs*1000 - fc_ex->fc_time.nsecs;
 814             if (delta_time.nsecs<0){
 815                 delta_time.nsecs+=1000000000;
 816                 delta_time.secs--;
 817             }
 818             proto_tree_add_time(ti, hf_fc_time, tvb, 0, 0, &delta_time);
 819         }
 820     }
 821     fchdr.fced=fc_ex;
 822
 823     if (ftype == FC_FTYPE_LINKCTL) {
 824         /* the lower 4 bits of R_CTL indicate the type of link ctl frame */
 825         proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset,
 826                                     FC_RCTL_SIZE, fchdr.r_ctl,
 827                                     "R_CTL: 0x%x(%s)",
 828                                     fchdr.r_ctl,
 829                                     val_to_str ((fchdr.r_ctl & 0x0F),
 830                                                 fc_lctl_proto_val, "0x%x"));
 831     } else if (ftype == FC_FTYPE_BLS) {
 832         /* the lower 4 bits of R_CTL indicate the type of BLS frame */
 833         proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset,
 834                                     FC_RCTL_SIZE, fchdr.r_ctl,
 835                                     "R_CTL: 0x%x(%s)",
 836                                     fchdr.r_ctl,
 837                                     val_to_str ((fchdr.r_ctl & 0x0F),
 838                                                 fc_bls_proto_val, "0x%x"));
 839     } else {
 840         proto_tree_add_item (fc_tree, hf_fc_rctl, tvb, offset, 1, FALSE);
 841     }
 842
 843     proto_tree_add_uint_hidden (fc_tree, hf_fc_ftype, tvb, offset, 1,
 844                            ftype);
 845
 846     proto_tree_add_string (fc_tree, hf_fc_did, tvb, offset+1, 3,
 847                            fc32_to_str (fchdr.d_id));
 848     proto_tree_add_string_hidden (fc_tree, hf_fc_id, tvb, offset+1, 3,
 849                            fc32_to_str (fchdr.d_id));
 850
 851     proto_tree_add_uint (fc_tree, hf_fc_csctl, tvb, offset+4, 1, fchdr.cs_ctl);
 852
 853     proto_tree_add_string (fc_tree, hf_fc_sid, tvb, offset+5, 3,
 854                            fc32_to_str (fchdr.s_id));
 855     proto_tree_add_string_hidden (fc_tree, hf_fc_id, tvb, offset+5, 3,
 856                            fc32_to_str (fchdr.s_id));
 857
 858     if (ftype == FC_FTYPE_LINKCTL) {
 859         if (((fchdr.r_ctl & 0x0F) == FC_LCTL_FBSYB) ||
 860             ((fchdr.r_ctl & 0x0F) == FC_LCTL_FBSYL)) {
 861             /* for F_BSY frames, the upper 4 bits of the type field specify the
 862              * reason for the BSY.
 863              */
 864             proto_tree_add_uint_format (fc_tree, hf_fc_type, tvb,
 865                                         offset+8, FC_TYPE_SIZE,
 866                                         fchdr.type,"Type: 0x%x(%s)", fchdr.type,
 867                                         fclctl_get_typestr (fchdr.r_ctl & 0x0F,
 868                                                             fchdr.type));
 869         } else {
 870             proto_tree_add_item (fc_tree, hf_fc_type, tvb, offset+8, 1, FALSE);
 871         }
 872     } else {
 873         proto_tree_add_item (fc_tree, hf_fc_type, tvb, offset+8, 1, FALSE);
 874     }
 875
 876
 877     dissect_fc_fctl(pinfo, fc_tree, tvb, offset+9, is_ack, fchdr.fctl);
 878
 879
 880     proto_tree_add_item (fc_tree, hf_fc_seqid, tvb, offset+12, 1, FALSE);
 881
 882     df_ctl = tvb_get_guint8(tvb, offset+13);
 883
 884     proto_tree_add_uint (fc_tree, hf_fc_dfctl, tvb, offset+13, 1, df_ctl);
 885     proto_tree_add_uint (fc_tree, hf_fc_seqcnt, tvb, offset+14, 2, fchdr.seqcnt);
 886     proto_tree_add_uint (fc_tree, hf_fc_oxid, tvb, offset+16, 2, fchdr.oxid);
 887     proto_tree_add_uint (fc_tree, hf_fc_rxid, tvb, offset+18, 2, fchdr.rxid);
 888
 889     if (ftype == FC_FTYPE_LINKCTL) {
 890         if (((fchdr.r_ctl & 0x0F) == FC_LCTL_FRJT) ||
 891             ((fchdr.r_ctl & 0x0F) == FC_LCTL_PRJT) ||
 892             ((fchdr.r_ctl & 0x0F) == FC_LCTL_PBSY)) {
 893             /* In all these cases of Link Ctl frame, the parameter field
 894              * encodes the detailed error message
 895              */
 896             proto_tree_add_uint_format (fc_tree, hf_fc_param, tvb,
 897                                         offset+20, 4, param,
 898                                         "Parameter: 0x%x(%s)", param,
 899                                         fclctl_get_paramstr ((fchdr.r_ctl & 0x0F),
 900                                                              param));
 901         } else {
 902             proto_tree_add_item (fc_tree, hf_fc_param, tvb, offset+20, 4, FALSE);
 903         }
 904     } else if (ftype == FC_FTYPE_BLS) {
 905         if ((fchdr.r_ctl & 0x0F) == FC_BLS_ABTS) {
 906             proto_tree_add_uint_format (fc_tree, hf_fc_param, tvb,
 907                                         offset+20, 4, param,
 908                                         "Parameter: 0x%x(%s)", param,
 909                                         ((param & 0x0F) == 1 ? "Abort Sequence" :
 910                                          "Abort Exchange"));
 911         } else {
 912             proto_tree_add_item (fc_tree, hf_fc_param, tvb, offset+20,
 913                                  4, FALSE);
 914         }
 915     } else {
 916         proto_tree_add_item (fc_tree, hf_fc_param, tvb, offset+20, 4, FALSE);
 917     }
 918
 919     /* Skip the Frame_Header */
 920     next_offset = offset + FC_HEADER_SIZE;
 921
 922     /* Network_Header present? */
 923     if (df_ctl & FC_DFCTL_NH) {
 924         /* Yes - dissect it. */
 925         if (tree) {
 926             proto_tree_add_string (fc_tree, hf_fc_nh_da, tvb, next_offset, 8,
 927                                    fcwwn_to_str (tvb_get_ptr (tvb, offset, 8)));
 928             proto_tree_add_string (fc_tree, hf_fc_nh_sa, tvb, offset+8, 8,
 929                                    fcwwn_to_str (tvb_get_ptr (tvb, offset+8, 8)));
 930         }
 931         next_offset += 16;
 932     }
 933
 934     /* XXX - handle Association_Header and Device_Header here */
 935
 936     if (ftype == FC_FTYPE_LINKCTL) {
 937         /* ACK_1 frames and other LINK_CTL frames echo the last seq bit if the
 938          * packet they're ack'ing did not have it set. So, we'll incorrectly
 939          * flag them as being fragmented when they're not. This fixes the
 940          * problem
 941          */
 942         is_lastframe_inseq = TRUE;
 943     } else {
 944         is_lastframe_inseq = fchdr.fctl & FC_FCTL_SEQ_LAST;
 945         /* XXX is this right?   offset 20, shouldnt it be offset 9? */
 946         is_exchg_resp = ((tvb_get_guint8 (tvb, offset+20) & 0x80) == 0x80);
 947     }
 948
 949     frag_size = tvb_reported_length (tvb)-FC_HEADER_SIZE;
 950
 951     /* If there is an MDS header, we need to subtract the MDS trailer size */
 952     if ((pinfo->ethertype == ETHERTYPE_UNK) || (pinfo->ethertype == ETHERTYPE_FCFT)) {
 953         frag_size -= MDSHDR_TRAILER_SIZE;
 954     } else if (pinfo->ethertype == ETHERTYPE_BRDWALK) {
 955         frag_size -= 8;         /* 4 byte of FC CRC +
 956                                    4 bytes of error+EOF = 8 bytes  */
 957     }
 958
 959     if (!is_lastframe_inseq) {
 960         /* Show this only as a fragmented FC frame */
 961         if (check_col (pinfo->cinfo, COL_INFO)) {
 962             col_append_str (pinfo->cinfo, COL_INFO, " (Fragmented)");
 963         }
 964     }
 965
 966     /* If this is a fragment, attempt to check if fully reassembled frame is
 967      * present, if we're configured to reassemble.
 968      */
 969     if ((ftype != FC_FTYPE_LINKCTL) && (ftype != FC_FTYPE_BLS) &&
 970         (!is_lastframe_inseq || fchdr.seqcnt) && fc_reassemble &&
 971         tvb_bytes_exist(tvb, FC_HEADER_SIZE, frag_size)) {
 972         /* Add this to the list of fragments */
 973         frag_id = (pinfo->oxid << 16) | is_exchg_resp;
 974
 975         /* We assume that all frames are of the same max size */
 976         fcfrag_head = fragment_add (tvb, FC_HEADER_SIZE, pinfo, frag_id,
 977                                     fc_fragment_table,
 978                                     fchdr.seqcnt * fc_max_frame_size,
 979                                     frag_size,
 980                                     !is_lastframe_inseq);
 981
 982         if (fcfrag_head) {
 983             next_tvb = tvb_new_real_data (fcfrag_head->data,
 984                                           fcfrag_head->datalen,
 985                                           fcfrag_head->datalen);
 986             tvb_set_child_real_data_tvbuff(tvb, next_tvb);
 987
 988             /* Add the defragmented data to the data source list. */
 989             add_new_data_source(pinfo, next_tvb, "Reassembled FC");
 990
 991             if (tree) {
 992                 proto_tree_add_boolean_hidden (fc_tree, hf_fc_reassembled,
 993                                                tvb, offset+9, 1, 1);
 994             }
 995         } else {
 996             if (tree) {
 997                 proto_tree_add_boolean_hidden (fc_tree, hf_fc_reassembled,
 998                                                tvb, offset+9, 1, 0);
 999             }
1000             next_tvb = tvb_new_subset (tvb, next_offset, -1, -1);
1001             call_dissector (data_handle, next_tvb, pinfo, tree);
1002             return;
1003         }
1004     } else {
1005         if (tree) {
1006             proto_tree_add_boolean_hidden (fc_tree, hf_fc_reassembled,
1007                                            tvb, offset+9, 1, 0);
1008         }
1009         next_tvb = tvb_new_subset (tvb, next_offset, -1, -1);
1010     }
1011
1012     if ((ftype != FC_FTYPE_LINKCTL) && (ftype != FC_FTYPE_BLS)) {
1013         if (!dissector_try_port (fcftype_dissector_table, ftype, next_tvb,
1014                                  pinfo, tree)) {
1015             call_dissector (data_handle, next_tvb, pinfo, tree);
1016         }
1017     } else if (ftype == FC_FTYPE_BLS) {
1018         if ((fchdr.r_ctl & 0x0F) == FC_BLS_BAACC) {
1019             dissect_fc_ba_acc (next_tvb, pinfo, tree);
1020         } else if ((fchdr.r_ctl & 0x0F) == FC_BLS_BARJT) {
1021             dissect_fc_ba_rjt (next_tvb, pinfo, tree);
1022         }
1023     }
1024
1025     tap_queue_packet(fc_tap, pinfo, &fchdr);
1026 }
1027
1028
1029 /* Register the protocol with Ethereal */
1030
1031 /* this format is require because a script is used to build the C function
1032    that calls all the protocol registration.
1033 */
1034
1035 void
1036 proto_register_fc(void)
1037 {
1038
1039 /* Setup list of header fields  See Section 1.6.1 for details*/
1040     static hf_register_info hf[] = {
1041         { &hf_fc_rctl,
1042           { "R_CTL", "fc.r_ctl", FT_UINT8, BASE_HEX, NULL, 0x0,
1043             "R_CTL", HFILL }},
1044         { &hf_fc_ftype,
1045           {"Frame type", "fc.ftype", FT_UINT8, BASE_HEX, VALS(fc_ftype_vals),
1046            0x0, "Derived Type", HFILL}},
1047         { &hf_fc_did,
1048           { "Dest Addr", "fc.d_id", FT_STRING, BASE_HEX, NULL, 0x0,
1049             "Destination Address", HFILL}},
1050         { &hf_fc_csctl,
1051           {"CS_CTL", "fc.cs_ctl", FT_UINT8, BASE_HEX, NULL, 0x0,
1052            "CS_CTL", HFILL}},
1053         { &hf_fc_sid,
1054           {"Src Addr", "fc.s_id", FT_STRING, BASE_HEX, NULL, 0x0,
1055            "Source Address", HFILL}},
1056         { &hf_fc_id,
1057           {"Addr", "fc.id", FT_STRING, BASE_HEX, NULL, 0x0,
1058            "Source or Destination Address", HFILL}},
1059         { &hf_fc_type,
1060           {"Type", "fc.type", FT_UINT8, BASE_HEX, VALS (fc_fc4_val), 0x0,
1061            "", HFILL}},
1062         { &hf_fc_fctl,
1063           {"F_CTL", "fc.f_ctl", FT_UINT24, BASE_HEX, NULL, 0x0, "", HFILL}},
1064         { &hf_fc_seqid,
1065           {"SEQ_ID", "fc.seq_id", FT_UINT8, BASE_HEX, NULL, 0x0,
1066            "Sequence ID", HFILL}},
1067         { &hf_fc_dfctl,
1068           {"DF_CTL", "fc.df_ctl", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL}},
1069         { &hf_fc_seqcnt,
1070           {"SEQ_CNT", "fc.seq_cnt", FT_UINT16, BASE_DEC, NULL, 0x0,
1071            "Sequence Count", HFILL}},
1072         { &hf_fc_oxid,
1073           {"OX_ID", "fc.ox_id", FT_UINT16, BASE_HEX, NULL, 0x0, "Originator ID",
1074            HFILL}},
1075         { &hf_fc_rxid,
1076           {"RX_ID", "fc.rx_id", FT_UINT16, BASE_HEX, NULL, 0x0, "Receiver ID",
1077            HFILL}},
1078         { &hf_fc_param,
1079           {"Parameter", "fc.parameter", FT_UINT32, BASE_HEX, NULL, 0x0, "Parameter",
1080            HFILL}},
1081
1082         { &hf_fc_reassembled,
1083           {"Reassembled Frame", "fc.reassembled", FT_BOOLEAN, BASE_HEX, NULL,
1084            0x0, "", HFILL}},
1085         { &hf_fc_nh_da,
1086           {"Network DA", "fc.nethdr.da", FT_STRING, BASE_HEX, NULL,
1087            0x0, "", HFILL}},
1088         { &hf_fc_nh_sa,
1089           {"Network SA", "fc.nethdr.sa", FT_STRING, BASE_HEX, NULL,
1090            0x0, "", HFILL}},
1091
1092         /* Basic Link Svc field definitions */
1093         { &hf_fc_bls_seqid_vld,
1094           {"SEQID Valid", "fc.bls_seqidvld", FT_UINT8, BASE_HEX,
1095            VALS (fc_bls_seqid_val), 0x0, "", HFILL}},
1096         { &hf_fc_bls_lastvld_seqid,
1097           {"Last Valid SEQID", "fc.bls_lastseqid", FT_UINT8, BASE_HEX, NULL,
1098            0x0, "", HFILL}},
1099         { &hf_fc_bls_oxid,
1100           {"OXID", "fc.bls_oxid", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL}},
1101         { &hf_fc_bls_rxid,
1102           {"RXID", "fc.bls_rxid", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL}},
1103         { &hf_fc_bls_lowseqcnt,
1104           {"Low SEQCNT", "fc.bls_lseqcnt", FT_UINT16, BASE_HEX, NULL, 0x0, "",
1105            HFILL}},
1106         { &hf_fc_bls_hiseqcnt,
1107           {"High SEQCNT", "fc.bls_hseqcnt", FT_UINT16, BASE_HEX, NULL, 0x0, "",
1108            HFILL}},
1109         { &hf_fc_bls_rjtcode,
1110           {"Reason", "fc.bls_reason", FT_UINT8, BASE_HEX, VALS(fc_bls_barjt_val),
1111            0x0, "", HFILL}},
1112         { &hf_fc_bls_rjtdetail,
1113           {"Reason Explanantion", "fc.bls_rjtdetail", FT_UINT8, BASE_HEX,
1114            VALS (fc_bls_barjt_det_val), 0x0, "", HFILL}},
1115         { &hf_fc_bls_vendor,
1116           {"Vendor Unique Reason", "fc.bls_vnduniq", FT_UINT8, BASE_HEX, NULL,
1117            0x0, "", HFILL}},
1118         { &hf_fc_fctl_exchange_responder,
1119           {"ExgRpd", "fc.fctl.exchange_responder", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_exchange_responder),
1120            FC_FCTL_EXCHANGE_RESPONDER, "Exchange Responder?", HFILL}},
1121         { &hf_fc_fctl_seq_recipient,
1122           {"SeqRec", "fc.fctl.seq_recipient", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_seq_recipient),
1123            FC_FCTL_SEQ_RECIPIENT, "Seq Recipient?", HFILL}},
1124         { &hf_fc_fctl_exchange_first,
1125           {"ExgFst", "fc.fctl.exchange_first", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_exchange_first),
1126            FC_FCTL_EXCHANGE_FIRST, "First Exchange?", HFILL}},
1127         { &hf_fc_fctl_exchange_last,
1128           {"ExgLst", "fc.fctl.exchange_last", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_exchange_last),
1129            FC_FCTL_EXCHANGE_LAST, "Last Exchange?", HFILL}},
1130         { &hf_fc_fctl_seq_last,
1131           {"SeqLst", "fc.fctl.seq_last", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_seq_last),
1132            FC_FCTL_SEQ_LAST, "Last Sequence?", HFILL}},
1133         { &hf_fc_fctl_priority,
1134           {"Pri", "fc.fctl.priority", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_priority),
1135            FC_FCTL_PRIORITY, "Priority", HFILL}},
1136         { &hf_fc_fctl_transfer_seq_initiative,
1137           {"TSI", "fc.fctl.transfer_seq_initiative", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_transfer_seq_initiative),
1138            FC_FCTL_TRANSFER_SEQ_INITIATIVE, "Transfer Seq Initiative", HFILL}},
1139         { &hf_fc_fctl_rexmitted_seq,
1140           {"RetSeq", "fc.fctl.rexmitted_seq", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_rexmitted_seq),
1141            FC_FCTL_REXMITTED_SEQ, "Retransmitted Sequence", HFILL}},
1142         { &hf_fc_fctl_rel_offset,
1143           {"RelOff", "fc.fctl.rel_offset", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_rel_offset),
1144            FC_FCTL_REL_OFFSET, "rel offset", HFILL}},
1145         { &hf_fc_fctl_last_data_frame,
1146           {"LDF", "fc.fctl.last_data_frame", FT_UINT24, BASE_HEX, VALS(last_data_frame_vals),
1147            FC_FCTL_LAST_DATA_FRAME_MASK, "Last Data Frame?", HFILL}},
1148         { &hf_fc_fctl_ack_0_1,
1149           {"A01", "fc.fctl.ack_0_1", FT_UINT24, BASE_HEX, VALS(ack_0_1_vals),
1150            FC_FCTL_ACK_0_1_MASK, "Ack 0/1 value", HFILL}},
1151         { &hf_fc_fctl_abts_ack,
1152           {"AA", "fc.fctl.abts_ack", FT_UINT24, BASE_HEX, VALS(abts_ack_vals),
1153            FC_FCTL_ABTS_MASK, "ABTS ACK values", HFILL}},
1154         { &hf_fc_fctl_abts_not_ack,
1155           {"AnA", "fc.fctl.abts_not_ack", FT_UINT24, BASE_HEX, VALS(abts_not_ack_vals),
1156            FC_FCTL_ABTS_MASK, "ABTS not ACK vals", HFILL}},
1157         { &hf_fc_exchange_first_frame,
1158           { "Exchange First In", "fc.exchange_first_frame", FT_FRAMENUM, BASE_NONE, NULL,
1159            0, "The first frame of this exchange is in this frame", HFILL }},
1160         { &hf_fc_exchange_last_frame,
1161           { "Exchange Last In", "fc.exchange_last_frame", FT_FRAMENUM, BASE_NONE, NULL,
1162            0, "The last frame of this exchange is in this frame", HFILL }},
1163         { &hf_fc_time,
1164           { "Time from Exchange First", "fc.time", FT_RELATIVE_TIME, BASE_NONE, NULL,
1165            0, "Time since the first frame of the Exchange", HFILL }},
1166     };
1167
1168     /* Setup protocol subtree array */
1169     static gint *ett[] = {
1170         &ett_fc,
1171         &ett_fcbls,
1172         &ett_fctl
1173     };
1174
1175     module_t *fc_module;
1176
1177     /* Register the protocol name and description */
1178     proto_fc = proto_register_protocol ("Fibre Channel", "FC", "fc");
1179     register_dissector ("fc", dissect_fc, proto_fc);
1180     fc_tap = register_tap("fc");
1181
1182     /* Required function calls to register the header fields and subtrees used */
1183     proto_register_field_array(proto_fc, hf, array_length(hf));
1184     proto_register_subtree_array(ett, array_length(ett));
1185
1186     fcftype_dissector_table = register_dissector_table ("fc.ftype",
1187                                                         "FC Frame Type",
1188                                                         FT_UINT8, BASE_HEX);
1189
1190     /* Register preferences */
1191     fc_module = prefs_register_protocol (proto_fc, NULL);
1192     prefs_register_bool_preference (fc_module,
1193                                     "reassemble",
1194                                     "Reassemble multi-frame sequences",
1195                                     "If enabled, reassembly of multi-frame "
1196                                     "sequences is done",
1197                                     &fc_reassemble);
1198     prefs_register_uint_preference (fc_module,
1199                                     "max_frame_size", "Max FC Frame Size",
1200                                     "This is the size of non-last frames in a "
1201                                     "multi-frame sequence", 10,
1202                                     &fc_max_frame_size);
1203
1204     register_init_routine(fc_defragment_init);
1205     register_init_routine (fc_exchange_init_protocol);
1206 }
1207
1208
1209 /* If this dissector uses sub-dissector registration add a registration routine.
1210    This format is required because a script is used to find these routines and
1211    create the code that calls these routines.
1212 */
1213 void
1214 proto_reg_handoff_fc (void)
1215 {
1216     dissector_handle_t fc_handle;
1217
1218     fc_handle = create_dissector_handle (dissect_fc, proto_fc);
1219
1220     data_handle = find_dissector("data");
1221 }