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 1.14 2003/08/24 01:06:20 guy 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.data[0]!=0)||(fced1->s_id.data[1]!=0)||(fced1->s_id.data[2]!=0)) && CMP_ADDRESS(&fced1->s_id, &fced2->s_id) ){
 169         return 0;
 170     }
 171     if(CMP_ADDRESS(&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_routing_val[] = {
 283     {FC_RCTL_DEV_DATA,  "Device_Data"},
 284     {FC_RCTL_ELS,       "Extended Link Services"},
 285     {FC_RCTL_LINK_DATA, "FC-4 Link_Data"},
 286     {FC_RCTL_VIDEO,     "Video_Data"},
 287     {FC_RCTL_BLS,       "Basic Link Services"},
 288     {FC_RCTL_LINK_CTL,  "Link_Control Frame"},
 289     {0, NULL},
 290 };
 291
 292 static const value_string fc_iu_val[] = {
 293     {FC_IU_UNCATEGORIZED   , "Uncategorized Data"},
 294     {FC_IU_SOLICITED_DATA  , "Solicited Data"},
 295     {FC_IU_UNSOLICITED_CTL , "Unsolicited Control"},
 296     {FC_IU_SOLICITED_CTL   , "Solicited Control"},
 297     {FC_IU_UNSOLICITED_DATA, "Solicited Data"},
 298     {FC_IU_DATA_DESCRIPTOR , "Data Descriptor"},
 299     {FC_IU_UNSOLICITED_CMD , "Unsolicited Command"},
 300     {FC_IU_CMD_STATUS      , "Command Status"},
 301     {0, NULL},
 302 };
 303
 304
 305 static void fc_defragment_init(void)
 306 {
 307   fragment_table_init(&fc_fragment_table);
 308 }
 309
 310
 311 static gchar *
 312 fctl_to_str (const guint8 *fctl, gchar *str, gboolean is_ack)
 313 {
 314     int stroff = 0;
 315     guint8 tmp = 0;
 316
 317     if (str == NULL)
 318         return (str);
 319
 320     if (fctl[0] & 0x80) {
 321         strcpy (str, "Exchange Responder, ");
 322         stroff += 20;
 323     }
 324     else {
 325         strcpy (str, "Exchange Originator, ");
 326         stroff += 21;
 327     }
 328
 329     if (fctl[0] & 0x40) {
 330         strcpy (&str[stroff], "Seq Recipient, ");
 331         stroff += 15;
 332     }
 333     else {
 334         strcpy (&str[stroff], "Seq Initiator, ");
 335         stroff += 15;
 336     }
 337
 338     if (fctl[0] & 0x20) {
 339         strcpy (&str[stroff], "Exchg First, ");
 340         stroff += 13;
 341     }
 342
 343     if (fctl[0] & 0x10) {
 344         strcpy (&str[stroff], "Exchg Last, ");
 345         stroff += 12;
 346     }
 347
 348     if (fctl[0] & 0x8) {
 349         strcpy (&str[stroff], "Seq Last, ");
 350         stroff += 10;
 351     }
 352
 353     if (fctl[0] & 0x2) {
 354         strcpy (&str[stroff], "Priority, ");
 355         stroff += 10;
 356     }
 357     else {
 358         strcpy (&str[stroff], "CS_CTL, ");
 359         stroff += 8;
 360     }
 361
 362     if (fctl[0] & 0x1) {
 363         strcpy (&str[stroff], "Transfer Seq Initiative, ");
 364         stroff += 25;
 365     }
 366
 367     if (fctl[1] & 0x30) {
 368         strcpy (&str[stroff], "ACK_0 Reqd, ");
 369         stroff += 12;
 370     }
 371     else if (fctl[1] & 0x10) {
 372         strcpy (&str[stroff], "ACK_1 Reqd, ");
 373         stroff += 12;
 374     }
 375
 376     if (fctl[1] & 0x2) {
 377         strcpy (&str[stroff], "Rexmitted Seq, ");
 378         stroff += 15;
 379     }
 380
 381     tmp = fctl[2] & 0xC0;
 382     switch (tmp) {
 383     case 0:
 384         strcpy (&str[stroff], "Last Data Frame - No Info, ");
 385         stroff += 27;
 386         break;
 387     case 1:
 388         strcpy (&str[stroff], "Last Data Frame - Seq Imm, ");
 389         stroff += 27;
 390         break;
 391     case 2:
 392         strcpy (&str[stroff], "Last Data Frame - Seq Soon, ");
 393         stroff += 28;
 394         break;
 395     case 3:
 396         strcpy (&str[stroff], "Last Data Frame - Seq Delyd, ");
 397         stroff += 29;
 398         break;
 399     }
 400
 401     tmp = fctl[2] & 0x30;
 402     switch (tmp) {
 403     case 0:
 404         if (is_ack) {
 405             strcpy (&str[stroff], "ABTS - Cont, ");
 406             stroff += 13;
 407         }
 408         else {
 409             strcpy (&str[stroff], "ABTS - Abort/MS, ");
 410             stroff += 17;
 411         }
 412         break;
 413     case 0x10:
 414         if (is_ack) {
 415             strcpy (&str[stroff], "ABTS - AbortABTS - Abort, ");
 416             stroff += 14;
 417         }
 418         else {
 419             strcpy (&str[stroff], "ABTS - Abort/SS, ");
 420             stroff += 17;
 421         }
 422         break;
 423     case 0x20:
 424         if (is_ack) {
 425             strcpy (&str[stroff], "ABTS - Stop, ");
 426             stroff += 13;
 427         }
 428         else {
 429             strcpy (&str[stroff], "ABTS - Process/IB, ");
 430             stroff += 19;
 431         }
 432         break;
 433     case 0x30:
 434         if (is_ack) {
 435             strcpy (&str[stroff], "ABTS - Imm Seq Retx, ");
 436             stroff += 21;
 437         }
 438         else {
 439             strcpy (&str[stroff], "ABTS - Discard/MS/Imm Retx, ");
 440             stroff += 28;
 441         }
 442         break;
 443     }
 444
 445     if (fctl[2] & 0x8) {
 446         strcpy (&str[stroff], "Rel Offset = 1");
 447         stroff += 14;
 448     }
 449
 450     return (str);
 451 }
 452
 453 /* BA_ACC & BA_RJT are decoded in this file itself instead of a traditional
 454  * dedicated file and dissector format because the dissector would require some
 455  * fields of the FC_HDR such as param in some cases, type in some others, the
 456  * lower 4 bits of r_ctl in some other cases etc. So, we decode BLS & Link Ctl
 457  * in this file itself.
 458  */
 459 static void
 460 dissect_fc_ba_acc (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 461 {
 462     /* Set up structures needed to add the protocol subtree and manage it */
 463     proto_item *ti;
 464     proto_tree *acc_tree;
 465     int offset = 0;
 466
 467     /* Make entries in Protocol column and Info column on summary display */
 468     if (check_col(pinfo->cinfo, COL_PROTOCOL))
 469         col_set_str(pinfo->cinfo, COL_PROTOCOL, "BLS");
 470
 471     if (check_col(pinfo->cinfo, COL_INFO))
 472         col_set_str(pinfo->cinfo, COL_INFO, "BA_ACC");
 473
 474     if (tree) {
 475         ti = proto_tree_add_text (tree, tvb, 0, tvb_length (tvb), "Basic Link Svc");
 476         acc_tree = proto_item_add_subtree (ti, ett_fcbls);
 477
 478         proto_tree_add_item (acc_tree, hf_fc_bls_seqid_vld, tvb, offset++, 1, FALSE);
 479         proto_tree_add_item (acc_tree, hf_fc_bls_lastvld_seqid, tvb, offset++, 1, FALSE);
 480         offset += 2; /* Skip reserved field */
 481         proto_tree_add_item (acc_tree, hf_fc_bls_oxid, tvb, offset, 2, FALSE);
 482         offset += 2;
 483         proto_tree_add_item (acc_tree, hf_fc_bls_rxid, tvb, offset, 2, FALSE);
 484         offset += 2;
 485         proto_tree_add_item (acc_tree, hf_fc_bls_lowseqcnt, tvb, offset, 2, FALSE);
 486         offset += 2;
 487         proto_tree_add_item (acc_tree, hf_fc_bls_hiseqcnt, tvb, offset, 2, FALSE);
 488     }
 489 }
 490
 491 static void
 492 dissect_fc_ba_rjt (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 493 {
 494     /* Set up structures needed to add the protocol subtree and manage it */
 495     proto_item *ti;
 496     proto_tree *rjt_tree;
 497     int offset = 0;
 498
 499     /* Make entries in Protocol column and Info column on summary display */
 500     if (check_col(pinfo->cinfo, COL_PROTOCOL))
 501         col_set_str(pinfo->cinfo, COL_PROTOCOL, "BLS");
 502
 503     if (check_col(pinfo->cinfo, COL_INFO))
 504         col_set_str(pinfo->cinfo, COL_INFO, "BA_RJT");
 505
 506     if (tree) {
 507         ti = proto_tree_add_text (tree, tvb, 0, tvb_length (tvb), "Basic Link Svc");
 508         rjt_tree = proto_item_add_subtree (ti, ett_fcbls);
 509
 510         proto_tree_add_item (rjt_tree, hf_fc_bls_rjtcode, tvb, offset+1, 1, FALSE);
 511         proto_tree_add_item (rjt_tree, hf_fc_bls_rjtdetail, tvb, offset+2, 1, FALSE);
 512         proto_tree_add_item (rjt_tree, hf_fc_bls_vendor, tvb, offset+3, 1, FALSE);
 513     }
 514 }
 515
 516 static guint8
 517 fc_get_ftype (guint8 r_ctl, guint8 type)
 518 {
 519     /* A simple attempt to determine the upper level protocol based on the
 520      * r_ctl & type fields.
 521      */
 522     switch (r_ctl & 0xF0) {
 523     case FC_RCTL_DEV_DATA:
 524         switch (type) {
 525         case FC_TYPE_SWILS:
 526             if ((r_ctl == 0x2) || (r_ctl == 0x3))
 527                 return FC_FTYPE_SWILS;
 528             else
 529                 return FC_FTYPE_UNDEF;
 530         case FC_TYPE_IP:
 531             return FC_FTYPE_IP;
 532         case FC_TYPE_SCSI:
 533             return FC_FTYPE_SCSI;
 534         case FC_TYPE_FCCT:
 535             return FC_FTYPE_FCCT;
 536         default:
 537             return FC_FTYPE_UNDEF;
 538         }
 539         break;
 540     case FC_RCTL_ELS:
 541         if (((r_ctl & 0x0F) == 0x2) || ((r_ctl & 0x0F) == 0x3))
 542             return FC_FTYPE_ELS;
 543         else
 544             return FC_FTYPE_UNDEF;
 545         break;
 546     case FC_RCTL_LINK_DATA:
 547         return FC_FTYPE_LINKDATA;
 548         break;
 549     case FC_RCTL_VIDEO:
 550         return FC_FTYPE_VDO;
 551         break;
 552     case FC_RCTL_BLS:
 553         if (type == 0)
 554             return FC_FTYPE_BLS;
 555         else
 556             return FC_FTYPE_UNDEF;
 557         break;
 558     case FC_RCTL_LINK_CTL:
 559         return FC_FTYPE_LINKCTL;
 560         break;
 561     default:
 562         return FC_FTYPE_UNDEF;
 563         break;
 564     }
 565 }
 566
 567 static const value_string abts_ack_vals[] = {
 568         {0x000000,      "ABTS - Cont"},
 569         {0x000010,      "ABTS - Abort"},
 570         {0x000020,      "ABTS - Stop"},
 571         {0x000030,      "ABTS - Imm Seq Retx"},
 572         {0,NULL}
 573 };
 574 static const value_string abts_not_ack_vals[] = {
 575         {0x000000,      "ABTS - Abort/MS"},
 576         {0x000010,      "ABTS - Abort/SS"},
 577         {0x000020,      "ABTS - Process/IB"},
 578         {0x000030,      "ABTS - Discard/MS/Imm Retx"},
 579         {0,NULL}
 580 };
 581 static const value_string last_data_frame_vals[] = {
 582         {0x000000,      "Last Data Frame - No Info"},
 583         {0x004000,      "Last Data Frame - Seq Imm"},
 584         {0x008000,      "Last Data Frame - Seq Soon"},
 585         {0x00c000,      "Last Data Frame - Seq Delyd"},
 586         {0,NULL}
 587 };
 588 static const value_string ack_0_1_vals[] = {
 589         {0x003000,      "ACK_0 Required"},
 590         {0x002000,      "ACK_0 Required"},
 591         {0x001000,      "ACK_1 Required"},
 592         {0x000000,      "no ack required"},
 593         {0,NULL}
 594 };
 595 static const true_false_string tfs_fc_fctl_exchange_responder = {
 596         "Exchange Responder",
 597         "Exchange Originator"
 598 };
 599 static const true_false_string tfs_fc_fctl_seq_recipient = {
 600         "Seq Recipient",
 601         "Seq Initiator"
 602 };
 603 static const true_false_string tfs_fc_fctl_exchange_first = {
 604         "Exchg First",
 605         "NOT exchg first"
 606 };
 607 static const true_false_string tfs_fc_fctl_exchange_last = {
 608         "Exchg Last",
 609         "NOT exchg last"
 610 };
 611 static const true_false_string tfs_fc_fctl_seq_last = {
 612         "Seq Last",
 613         "NOT seq last"
 614 };
 615 static const true_false_string tfs_fc_fctl_priority = {
 616         "Priority",
 617         "CS_CTL"
 618 };
 619 static const true_false_string tfs_fc_fctl_transfer_seq_initiative = {
 620         "Transfer Seq Initiative",
 621         "NOT transfer seq initiative"
 622 };
 623 static const true_false_string tfs_fc_fctl_rexmitted_seq = {
 624         "Retransmitted Sequence",
 625         "NOT retransmitted sequence"
 626 };
 627 static const true_false_string tfs_fc_fctl_rel_offset = {
 628         "Rel Offset SET",
 629         "rel offset NOT set"
 630 };
 631
 632
 633
 634
 635 /* code to dissect the  F_CTL bitmask */
 636 static void
 637 dissect_fc_fctl(packet_info *pinfo _U_, proto_tree *parent_tree, tvbuff_t *tvb, int offset, gboolean is_ack, guint32 fctl)
 638 {
 639         proto_item *item;
 640         proto_tree *tree;
 641         gchar str[256];
 642
 643         item=proto_tree_add_uint(parent_tree, hf_fc_fctl, tvb, offset, 3, fctl);
 644         tree=proto_item_add_subtree(item, ett_fctl);
 645
 646
 647         proto_tree_add_boolean(tree, hf_fc_fctl_exchange_responder, tvb, offset, 3, fctl);
 648
 649         proto_tree_add_boolean(tree, hf_fc_fctl_seq_recipient, tvb, offset, 3, fctl);
 650
 651         proto_tree_add_boolean(tree, hf_fc_fctl_exchange_first, tvb, offset, 3, fctl);
 652
 653         proto_tree_add_boolean(tree, hf_fc_fctl_exchange_last, tvb, offset, 3, fctl);
 654
 655         proto_tree_add_boolean(tree, hf_fc_fctl_seq_last, tvb, offset, 3, fctl);
 656
 657         proto_tree_add_boolean(tree, hf_fc_fctl_priority, tvb, offset, 3, fctl);
 658
 659         proto_tree_add_boolean(tree, hf_fc_fctl_transfer_seq_initiative, tvb, offset, 3, fctl);
 660
 661         proto_tree_add_uint(tree, hf_fc_fctl_last_data_frame, tvb, offset, 3, fctl);
 662
 663         proto_tree_add_uint(tree, hf_fc_fctl_ack_0_1, tvb, offset, 3, fctl);
 664
 665
 666         proto_tree_add_boolean(tree, hf_fc_fctl_rexmitted_seq, tvb, offset, 3, fctl);
 667
 668         if(is_ack){
 669                 proto_tree_add_uint(tree, hf_fc_fctl_abts_ack, tvb, offset, 3, fctl);
 670         } else {
 671                 proto_tree_add_uint(tree, hf_fc_fctl_abts_ack, tvb, offset, 3, fctl);
 672         }
 673
 674         proto_tree_add_boolean(tree, hf_fc_fctl_rel_offset, tvb, offset, 3, fctl);
 675
 676         fctl_to_str( ((guint8 *)&fctl)+1, str, is_ack);
 677         proto_item_append_text(item, "  %s", str);
 678 }
 679
 680 static const value_string fc_bls_proto_val[] = {
 681     {FC_BLS_NOP    , "NOP"},
 682     {FC_BLS_ABTS   , "ABTS"},
 683     {FC_BLS_RMC    , "RMC"},
 684     {FC_BLS_BAACC  , "BA_ACC"},
 685     {FC_BLS_BARJT  , "BA_RJT"},
 686     {FC_BLS_PRMT   , "PRMT"},
 687     {0, NULL},
 688 };
 689
 690 static const value_string fc_els_proto_val[] = {
 691     {0x01    , "Solicited Data"},
 692     {0x02    , "Request"},
 693     {0x03    , "Reply"},
 694     {0, NULL},
 695 };
 696
 697 /* Code to actually dissect the packets */
 698 static void
 699 dissect_fc (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 700 {
 701    /* Set up structures needed to add the protocol subtree and manage it */
 702     proto_item *ti=NULL;
 703     proto_tree *fc_tree = NULL;
 704     tvbuff_t *next_tvb;
 705     int offset = 0, next_offset;
 706     gboolean is_lastframe_inseq;
 707     gboolean is_exchg_resp = 0;
 708     fragment_data *fcfrag_head;
 709     guint32 frag_id;
 710     guint32 frag_size;
 711     guint8 df_ctl;
 712
 713     guint32 param;
 714     guint8 ftype;
 715     gboolean is_ack;
 716
 717     static fc_hdr fchdr;
 718     fc_exchange_data *fc_ex=NULL;
 719
 720     fchdr.fced=NULL;
 721
 722     /* Make entries in Protocol column and Info column on summary display */
 723     if (check_col(pinfo->cinfo, COL_PROTOCOL))
 724         col_set_str(pinfo->cinfo, COL_PROTOCOL, "FC");
 725
 726     fchdr.r_ctl = tvb_get_guint8 (tvb, offset);
 727
 728     /* If the R_CTL is the EISL field, skip the first 8 bytes to retrieve the
 729      * real FC header. EISL is Cisco-proprietary and is not decoded.
 730      */
 731     if (fchdr.r_ctl == FC_RCTL_EISL) {
 732         offset += 8;
 733         fchdr.r_ctl = tvb_get_guint8 (tvb, offset);
 734     }
 735
 736     SET_ADDRESS (&pinfo->dst, AT_FC, 3, tvb_get_ptr(tvb,offset+1,3));
 737     SET_ADDRESS (&fchdr.d_id, AT_FC, 3, tvb_get_ptr(tvb,offset+1,3));
 738     SET_ADDRESS (&pinfo->src, AT_FC, 3, tvb_get_ptr(tvb,offset+5,3));
 739     SET_ADDRESS (&fchdr.s_id, AT_FC, 3, tvb_get_ptr(tvb,offset+5,3));
 740     fchdr.cs_ctl = tvb_get_guint8 (tvb, offset+4);
 741     fchdr.type  = tvb_get_guint8 (tvb, offset+8);
 742     fchdr.fctl=tvb_get_ntoh24(tvb,offset+9);
 743     fchdr.seqcnt = tvb_get_ntohs (tvb, offset+14);
 744     fchdr.oxid=tvb_get_ntohs(tvb,offset+16);
 745     fchdr.rxid=tvb_get_ntohs(tvb,offset+18);
 746     param = tvb_get_ntohl (tvb, offset+20);
 747
 748     pinfo->oxid = fchdr.oxid;
 749     pinfo->rxid = fchdr.rxid;
 750     pinfo->ptype = PT_EXCHG;
 751     pinfo->r_ctl = fchdr.r_ctl;
 752
 753     is_ack = ((fchdr.r_ctl == 0xC0) || (fchdr.r_ctl == 0xC1));
 754
 755     ftype = fc_get_ftype (fchdr.r_ctl, fchdr.type);
 756
 757     if (check_col (pinfo->cinfo, COL_INFO)) {
 758         col_add_str (pinfo->cinfo, COL_INFO, match_strval (ftype, fc_ftype_vals));
 759
 760         if (ftype == FC_FTYPE_LINKCTL)
 761             col_append_fstr (pinfo->cinfo, COL_INFO, ", %s",
 762                              match_strval ((fchdr.r_ctl & 0x0F),
 763                                            fc_lctl_proto_val));
 764     }
 765
 766     /* In the interest of speed, if "tree" is NULL, don't do any work not
 767        necessary to generate protocol tree items. */
 768     if (tree) {
 769         ti = proto_tree_add_protocol_format (tree, proto_fc, tvb, offset,
 770                                              FC_HEADER_SIZE, "Fibre Channel");
 771         fc_tree = proto_item_add_subtree (ti, ett_fc);
 772     }
 773
 774     /* match first exchange with last exchange */
 775     if(fchdr.fctl&FC_FCTL_EXCHANGE_FIRST){
 776         if(!pinfo->fd->flags.visited){
 777             fc_exchange_data fced, *old_fced;
 778
 779             /* first check if we already have seen this exchange and it
 780                is still open/unmatched.
 781             */
 782             fced.oxid=fchdr.oxid;
 783             SET_ADDRESS(&fced.s_id, fchdr.s_id.type, fchdr.s_id.len, fchdr.s_id.data);
 784             SET_ADDRESS(&fced.d_id, fchdr.d_id.type, fchdr.d_id.len, fchdr.d_id.data);
 785             old_fced=g_hash_table_lookup(fc_exchange_unmatched, &fced);
 786             if(old_fced){
 787                 g_hash_table_remove(fc_exchange_unmatched, old_fced);
 788             }
 789             old_fced=g_mem_chunk_alloc(fc_exchange_vals);
 790             old_fced->oxid=fchdr.oxid;
 791             COPY_ADDRESS(&old_fced->s_id, &fchdr.s_id);
 792             COPY_ADDRESS(&old_fced->d_id, &fchdr.d_id);
 793             old_fced->first_exchange_frame=pinfo->fd->num;
 794             old_fced->fc_time.nsecs = pinfo->fd->abs_usecs*1000;
 795             old_fced->fc_time.secs = pinfo->fd->abs_secs;
 796             g_hash_table_insert(fc_exchange_unmatched, old_fced, old_fced);
 797             fc_ex=old_fced;
 798         } else {
 799             fc_exchange_data fced, *old_fced;
 800             fced.oxid=fchdr.oxid;
 801             fced.first_exchange_frame=pinfo->fd->num;
 802             fced.last_exchange_frame=0;
 803             old_fced=g_hash_table_lookup(fc_exchange_matched, &fced);
 804             fc_ex=old_fced;
 805         }
 806     }
 807     if(fchdr.fctl&FC_FCTL_EXCHANGE_LAST){
 808         if(!pinfo->fd->flags.visited){
 809             fc_exchange_data fced, *old_fced;
 810
 811             fced.oxid=fchdr.oxid;
 812             SET_ADDRESS(&fced.s_id, fchdr.d_id.type, fchdr.d_id.len, fchdr.d_id.data);
 813             SET_ADDRESS(&fced.d_id, fchdr.s_id.type, fchdr.s_id.len, fchdr.s_id.data);
 814             old_fced=g_hash_table_lookup(fc_exchange_unmatched, &fced);
 815             if(old_fced){
 816                 g_hash_table_remove(fc_exchange_unmatched, old_fced);
 817                 old_fced->last_exchange_frame=pinfo->fd->num;
 818                 g_hash_table_insert(fc_exchange_matched, old_fced, old_fced);
 819             }
 820             fc_ex=old_fced;
 821         } else {
 822             fc_exchange_data fced, *old_fced;
 823             fced.oxid=fchdr.oxid;
 824             fced.first_exchange_frame=0;
 825             fced.last_exchange_frame=pinfo->fd->num;
 826             old_fced=g_hash_table_lookup(fc_exchange_matched, &fced);
 827             fc_ex=old_fced;
 828         }
 829     }
 830     if(fc_ex){
 831         if(fchdr.fctl&FC_FCTL_EXCHANGE_FIRST){
 832             proto_tree_add_uint(fc_tree, hf_fc_exchange_last_frame, tvb, 0, 0, fc_ex->last_exchange_frame);
 833         }
 834         if(fchdr.fctl&FC_FCTL_EXCHANGE_LAST){
 835             nstime_t delta_time;
 836             proto_tree_add_uint(fc_tree, hf_fc_exchange_first_frame, tvb, 0, 0, fc_ex->first_exchange_frame);
 837             delta_time.secs = pinfo->fd->abs_secs - fc_ex->fc_time.secs;
 838             delta_time.nsecs = pinfo->fd->abs_usecs*1000 - fc_ex->fc_time.nsecs;
 839             if (delta_time.nsecs<0){
 840                 delta_time.nsecs+=1000000000;
 841                 delta_time.secs--;
 842             }
 843             proto_tree_add_time(ti, hf_fc_time, tvb, 0, 0, &delta_time);
 844         }
 845     }
 846     fchdr.fced=fc_ex;
 847
 848     switch (fchdr.r_ctl & 0xF0) {
 849
 850     case FC_RCTL_DEV_DATA:
 851     case FC_RCTL_LINK_DATA:
 852     case FC_RCTL_VIDEO:
 853         /* the lower 4 bits of R_CTL are the information category */
 854         proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset,
 855                                     FC_RCTL_SIZE, fchdr.r_ctl,
 856                                     "R_CTL: 0x%x(%s/%s)",
 857                                     fchdr.r_ctl,
 858                                     val_to_str ((fchdr.r_ctl & 0xF0),
 859                                                 fc_routing_val, "0x%x"),
 860                                     val_to_str ((fchdr.r_ctl & 0x0F),
 861                                                 fc_iu_val, "0x%x"));
 862         break;
 863
 864     case FC_RCTL_LINK_CTL:
 865         /* the lower 4 bits of R_CTL indicate the type of link ctl frame */
 866         proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset,
 867                                     FC_RCTL_SIZE, fchdr.r_ctl,
 868                                     "R_CTL: 0x%x(%s/%s)",
 869                                     fchdr.r_ctl,
 870                                     val_to_str ((fchdr.r_ctl & 0xF0),
 871                                                 fc_routing_val, "0x%x"),
 872                                     val_to_str ((fchdr.r_ctl & 0x0F),
 873                                                 fc_lctl_proto_val, "0x%x"));
 874         break;
 875
 876     case FC_RCTL_BLS:
 877         switch (fchdr.type) {
 878
 879         case 0x00:
 880             /* the lower 4 bits of R_CTL indicate the type of BLS frame */
 881             proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset,
 882                                         FC_RCTL_SIZE, fchdr.r_ctl,
 883                                         "R_CTL: 0x%x(%s/%s)",
 884                                         fchdr.r_ctl,
 885                                         val_to_str ((fchdr.r_ctl & 0xF0),
 886                                                     fc_routing_val, "0x%x"),
 887                                         val_to_str ((fchdr.r_ctl & 0x0F),
 888                                                     fc_bls_proto_val, "0x%x"));
 889             break;
 890
 891         default:
 892             proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset,
 893                                         FC_RCTL_SIZE, fchdr.r_ctl,
 894                                         "R_CTL: 0x%x(%s/0x%x)",
 895                                         fchdr.r_ctl,
 896                                         val_to_str ((fchdr.r_ctl & 0xF0),
 897                                                     fc_routing_val, "0x%x"),
 898                                         fchdr.r_ctl & 0x0F);
 899             break;
 900         }
 901         break;
 902
 903     case FC_RCTL_ELS:
 904         switch (fchdr.type) {
 905
 906         case 0x01:
 907             /* the lower 4 bits of R_CTL indicate the type of ELS frame */
 908             proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset,
 909                                         FC_RCTL_SIZE, fchdr.r_ctl,
 910                                         "R_CTL: 0x%x(%s/%s)",
 911                                         fchdr.r_ctl,
 912                                         val_to_str ((fchdr.r_ctl & 0xF0),
 913                                                     fc_routing_val, "0x%x"),
 914                                         val_to_str ((fchdr.r_ctl & 0x0F),
 915                                                     fc_els_proto_val, "0x%x"));
 916             break;
 917
 918         default:
 919             proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset,
 920                                         FC_RCTL_SIZE, fchdr.r_ctl,
 921                                         "R_CTL: 0x%x(%s/0x%x)",
 922                                         fchdr.r_ctl,
 923                                         val_to_str ((fchdr.r_ctl & 0xF0),
 924                                                     fc_routing_val, "0x%x"),
 925                                         fchdr.r_ctl & 0x0F);
 926             break;
 927         }
 928         break;
 929
 930     default:
 931         proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset,
 932                                     FC_RCTL_SIZE, fchdr.r_ctl,
 933                                     "R_CTL: 0x%x(%s/0x%x)",
 934                                     fchdr.r_ctl,
 935                                     val_to_str ((fchdr.r_ctl & 0xF0),
 936                                                 fc_routing_val, "0x%x"),
 937                                     fchdr.r_ctl & 0x0F);
 938         break;
 939     }
 940
 941     proto_tree_add_uint_hidden (fc_tree, hf_fc_ftype, tvb, offset, 1,
 942                            ftype);
 943
 944     /* XXX - use "fc_wka_vals[]" on this? */
 945     proto_tree_add_string (fc_tree, hf_fc_did, tvb, offset+1, 3,
 946                            fc_to_str (fchdr.d_id.data));
 947     proto_tree_add_string_hidden (fc_tree, hf_fc_id, tvb, offset+1, 3,
 948                            fc_to_str (fchdr.d_id.data));
 949
 950     proto_tree_add_uint (fc_tree, hf_fc_csctl, tvb, offset+4, 1, fchdr.cs_ctl);
 951
 952     /* XXX - use "fc_wka_vals[]" on this? */
 953     proto_tree_add_string (fc_tree, hf_fc_sid, tvb, offset+5, 3,
 954                            fc_to_str (fchdr.s_id.data));
 955     proto_tree_add_string_hidden (fc_tree, hf_fc_id, tvb, offset+5, 3,
 956                            fc_to_str (fchdr.s_id.data));
 957
 958     if (ftype == FC_FTYPE_LINKCTL) {
 959         if (((fchdr.r_ctl & 0x0F) == FC_LCTL_FBSYB) ||
 960             ((fchdr.r_ctl & 0x0F) == FC_LCTL_FBSYL)) {
 961             /* for F_BSY frames, the upper 4 bits of the type field specify the
 962              * reason for the BSY.
 963              */
 964             proto_tree_add_uint_format (fc_tree, hf_fc_type, tvb,
 965                                         offset+8, FC_TYPE_SIZE,
 966                                         fchdr.type,"Type: 0x%x(%s)", fchdr.type,
 967                                         fclctl_get_typestr (fchdr.r_ctl & 0x0F,
 968                                                             fchdr.type));
 969         } else {
 970             proto_tree_add_item (fc_tree, hf_fc_type, tvb, offset+8, 1, FALSE);
 971         }
 972     } else {
 973         proto_tree_add_item (fc_tree, hf_fc_type, tvb, offset+8, 1, FALSE);
 974     }
 975
 976
 977     dissect_fc_fctl(pinfo, fc_tree, tvb, offset+9, is_ack, fchdr.fctl);
 978
 979
 980     proto_tree_add_item (fc_tree, hf_fc_seqid, tvb, offset+12, 1, FALSE);
 981
 982     df_ctl = tvb_get_guint8(tvb, offset+13);
 983
 984     proto_tree_add_uint (fc_tree, hf_fc_dfctl, tvb, offset+13, 1, df_ctl);
 985     proto_tree_add_uint (fc_tree, hf_fc_seqcnt, tvb, offset+14, 2, fchdr.seqcnt);
 986     proto_tree_add_uint (fc_tree, hf_fc_oxid, tvb, offset+16, 2, fchdr.oxid);
 987     proto_tree_add_uint (fc_tree, hf_fc_rxid, tvb, offset+18, 2, fchdr.rxid);
 988
 989     if (ftype == FC_FTYPE_LINKCTL) {
 990         if (((fchdr.r_ctl & 0x0F) == FC_LCTL_FRJT) ||
 991             ((fchdr.r_ctl & 0x0F) == FC_LCTL_PRJT) ||
 992             ((fchdr.r_ctl & 0x0F) == FC_LCTL_PBSY)) {
 993             /* In all these cases of Link Ctl frame, the parameter field
 994              * encodes the detailed error message
 995              */
 996             proto_tree_add_uint_format (fc_tree, hf_fc_param, tvb,
 997                                         offset+20, 4, param,
 998                                         "Parameter: 0x%x(%s)", param,
 999                                         fclctl_get_paramstr ((fchdr.r_ctl & 0x0F),
1000                                                              param));
1001         } else {
1002             proto_tree_add_item (fc_tree, hf_fc_param, tvb, offset+20, 4, FALSE);
1003         }
1004     } else if (ftype == FC_FTYPE_BLS) {
1005         if ((fchdr.r_ctl & 0x0F) == FC_BLS_ABTS) {
1006             proto_tree_add_uint_format (fc_tree, hf_fc_param, tvb,
1007                                         offset+20, 4, param,
1008                                         "Parameter: 0x%x(%s)", param,
1009                                         ((param & 0x0F) == 1 ? "Abort Sequence" :
1010                                          "Abort Exchange"));
1011         } else {
1012             proto_tree_add_item (fc_tree, hf_fc_param, tvb, offset+20,
1013                                  4, FALSE);
1014         }
1015     } else {
1016         proto_tree_add_item (fc_tree, hf_fc_param, tvb, offset+20, 4, FALSE);
1017     }
1018
1019     /* Skip the Frame_Header */
1020     next_offset = offset + FC_HEADER_SIZE;
1021
1022     /* Network_Header present? */
1023     if (df_ctl & FC_DFCTL_NH) {
1024         /* Yes - dissect it. */
1025         if (tree) {
1026             proto_tree_add_string (fc_tree, hf_fc_nh_da, tvb, next_offset, 8,
1027                                    fcwwn_to_str (tvb_get_ptr (tvb, offset, 8)));
1028             proto_tree_add_string (fc_tree, hf_fc_nh_sa, tvb, offset+8, 8,
1029                                    fcwwn_to_str (tvb_get_ptr (tvb, offset+8, 8)));
1030         }
1031         next_offset += 16;
1032     }
1033
1034     /* XXX - handle Association_Header and Device_Header here */
1035
1036     if (ftype == FC_FTYPE_LINKCTL) {
1037         /* ACK_1 frames and other LINK_CTL frames echo the last seq bit if the
1038          * packet they're ack'ing did not have it set. So, we'll incorrectly
1039          * flag them as being fragmented when they're not. This fixes the
1040          * problem
1041          */
1042         is_lastframe_inseq = TRUE;
1043     } else {
1044         is_lastframe_inseq = fchdr.fctl & FC_FCTL_SEQ_LAST;
1045         /* XXX is this right?   offset 20, shouldnt it be offset 9? */
1046         is_exchg_resp = ((tvb_get_guint8 (tvb, offset+20) & 0x80) == 0x80);
1047     }
1048
1049     frag_size = tvb_reported_length (tvb)-FC_HEADER_SIZE;
1050
1051     /* If there is an MDS header, we need to subtract the MDS trailer size */
1052     if ((pinfo->ethertype == ETHERTYPE_UNK) || (pinfo->ethertype == ETHERTYPE_FCFT)) {
1053         frag_size -= MDSHDR_TRAILER_SIZE;
1054     } else if (pinfo->ethertype == ETHERTYPE_BRDWALK) {
1055         frag_size -= 8;         /* 4 byte of FC CRC +
1056                                    4 bytes of error+EOF = 8 bytes  */
1057     }
1058
1059     if (!is_lastframe_inseq) {
1060         /* Show this only as a fragmented FC frame */
1061         if (check_col (pinfo->cinfo, COL_INFO)) {
1062             col_append_str (pinfo->cinfo, COL_INFO, " (Fragmented)");
1063         }
1064     }
1065
1066     /* If this is a fragment, attempt to check if fully reassembled frame is
1067      * present, if we're configured to reassemble.
1068      */
1069     if ((ftype != FC_FTYPE_LINKCTL) && (ftype != FC_FTYPE_BLS) &&
1070         (!is_lastframe_inseq || fchdr.seqcnt) && fc_reassemble &&
1071         tvb_bytes_exist(tvb, FC_HEADER_SIZE, frag_size)) {
1072         /* Add this to the list of fragments */
1073         frag_id = (pinfo->oxid << 16) | is_exchg_resp;
1074
1075         /* We assume that all frames are of the same max size */
1076         fcfrag_head = fragment_add (tvb, FC_HEADER_SIZE, pinfo, frag_id,
1077                                     fc_fragment_table,
1078                                     fchdr.seqcnt * fc_max_frame_size,
1079                                     frag_size,
1080                                     !is_lastframe_inseq);
1081
1082         if (fcfrag_head) {
1083             next_tvb = tvb_new_real_data (fcfrag_head->data,
1084                                           fcfrag_head->datalen,
1085                                           fcfrag_head->datalen);
1086             tvb_set_child_real_data_tvbuff(tvb, next_tvb);
1087
1088             /* Add the defragmented data to the data source list. */
1089             add_new_data_source(pinfo, next_tvb, "Reassembled FC");
1090
1091             if (tree) {
1092                 proto_tree_add_boolean_hidden (fc_tree, hf_fc_reassembled,
1093                                                tvb, offset+9, 1, 1);
1094             }
1095         } else {
1096             if (tree) {
1097                 proto_tree_add_boolean_hidden (fc_tree, hf_fc_reassembled,
1098                                                tvb, offset+9, 1, 0);
1099             }
1100             next_tvb = tvb_new_subset (tvb, next_offset, -1, -1);
1101             call_dissector (data_handle, next_tvb, pinfo, tree);
1102             return;
1103         }
1104     } else {
1105         if (tree) {
1106             proto_tree_add_boolean_hidden (fc_tree, hf_fc_reassembled,
1107                                            tvb, offset+9, 1, 0);
1108         }
1109         next_tvb = tvb_new_subset (tvb, next_offset, -1, -1);
1110     }
1111
1112     if ((ftype != FC_FTYPE_LINKCTL) && (ftype != FC_FTYPE_BLS)) {
1113         if (!dissector_try_port (fcftype_dissector_table, ftype, next_tvb,
1114                                  pinfo, tree)) {
1115             call_dissector (data_handle, next_tvb, pinfo, tree);
1116         }
1117     } else if (ftype == FC_FTYPE_BLS) {
1118         if ((fchdr.r_ctl & 0x0F) == FC_BLS_BAACC) {
1119             dissect_fc_ba_acc (next_tvb, pinfo, tree);
1120         } else if ((fchdr.r_ctl & 0x0F) == FC_BLS_BARJT) {
1121             dissect_fc_ba_rjt (next_tvb, pinfo, tree);
1122         }
1123     }
1124
1125     tap_queue_packet(fc_tap, pinfo, &fchdr);
1126 }
1127
1128
1129 /* Register the protocol with Ethereal */
1130
1131 /* this format is require because a script is used to build the C function
1132    that calls all the protocol registration.
1133 */
1134
1135 void
1136 proto_register_fc(void)
1137 {
1138
1139 /* Setup list of header fields  See Section 1.6.1 for details*/
1140     static hf_register_info hf[] = {
1141         { &hf_fc_rctl,
1142           { "R_CTL", "fc.r_ctl", FT_UINT8, BASE_HEX, NULL, 0x0,
1143             "R_CTL", HFILL }},
1144         { &hf_fc_ftype,
1145           {"Frame type", "fc.ftype", FT_UINT8, BASE_HEX, VALS(fc_ftype_vals),
1146            0x0, "Derived Type", HFILL}},
1147         { &hf_fc_did,
1148           { "Dest Addr", "fc.d_id", FT_STRING, BASE_HEX, NULL, 0x0,
1149             "Destination Address", HFILL}},
1150         { &hf_fc_csctl,
1151           {"CS_CTL", "fc.cs_ctl", FT_UINT8, BASE_HEX, NULL, 0x0,
1152            "CS_CTL", HFILL}},
1153         { &hf_fc_sid,
1154           {"Src Addr", "fc.s_id", FT_STRING, BASE_HEX, NULL, 0x0,
1155            "Source Address", HFILL}},
1156         { &hf_fc_id,
1157           {"Addr", "fc.id", FT_STRING, BASE_HEX, NULL, 0x0,
1158            "Source or Destination Address", HFILL}},
1159         { &hf_fc_type,
1160           {"Type", "fc.type", FT_UINT8, BASE_HEX, VALS (fc_fc4_val), 0x0,
1161            "", HFILL}},
1162         { &hf_fc_fctl,
1163           {"F_CTL", "fc.f_ctl", FT_UINT24, BASE_HEX, NULL, 0x0, "", HFILL}},
1164         { &hf_fc_seqid,
1165           {"SEQ_ID", "fc.seq_id", FT_UINT8, BASE_HEX, NULL, 0x0,
1166            "Sequence ID", HFILL}},
1167         { &hf_fc_dfctl,
1168           {"DF_CTL", "fc.df_ctl", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL}},
1169         { &hf_fc_seqcnt,
1170           {"SEQ_CNT", "fc.seq_cnt", FT_UINT16, BASE_DEC, NULL, 0x0,
1171            "Sequence Count", HFILL}},
1172         { &hf_fc_oxid,
1173           {"OX_ID", "fc.ox_id", FT_UINT16, BASE_HEX, NULL, 0x0, "Originator ID",
1174            HFILL}},
1175         { &hf_fc_rxid,
1176           {"RX_ID", "fc.rx_id", FT_UINT16, BASE_HEX, NULL, 0x0, "Receiver ID",
1177            HFILL}},
1178         { &hf_fc_param,
1179           {"Parameter", "fc.parameter", FT_UINT32, BASE_HEX, NULL, 0x0, "Parameter",
1180            HFILL}},
1181
1182         { &hf_fc_reassembled,
1183           {"Reassembled Frame", "fc.reassembled", FT_BOOLEAN, BASE_HEX, NULL,
1184            0x0, "", HFILL}},
1185         { &hf_fc_nh_da,
1186           {"Network DA", "fc.nethdr.da", FT_STRING, BASE_HEX, NULL,
1187            0x0, "", HFILL}},
1188         { &hf_fc_nh_sa,
1189           {"Network SA", "fc.nethdr.sa", FT_STRING, BASE_HEX, NULL,
1190            0x0, "", HFILL}},
1191
1192         /* Basic Link Svc field definitions */
1193         { &hf_fc_bls_seqid_vld,
1194           {"SEQID Valid", "fc.bls_seqidvld", FT_UINT8, BASE_HEX,
1195            VALS (fc_bls_seqid_val), 0x0, "", HFILL}},
1196         { &hf_fc_bls_lastvld_seqid,
1197           {"Last Valid SEQID", "fc.bls_lastseqid", FT_UINT8, BASE_HEX, NULL,
1198            0x0, "", HFILL}},
1199         { &hf_fc_bls_oxid,
1200           {"OXID", "fc.bls_oxid", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL}},
1201         { &hf_fc_bls_rxid,
1202           {"RXID", "fc.bls_rxid", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL}},
1203         { &hf_fc_bls_lowseqcnt,
1204           {"Low SEQCNT", "fc.bls_lseqcnt", FT_UINT16, BASE_HEX, NULL, 0x0, "",
1205            HFILL}},
1206         { &hf_fc_bls_hiseqcnt,
1207           {"High SEQCNT", "fc.bls_hseqcnt", FT_UINT16, BASE_HEX, NULL, 0x0, "",
1208            HFILL}},
1209         { &hf_fc_bls_rjtcode,
1210           {"Reason", "fc.bls_reason", FT_UINT8, BASE_HEX, VALS(fc_bls_barjt_val),
1211            0x0, "", HFILL}},
1212         { &hf_fc_bls_rjtdetail,
1213           {"Reason Explanantion", "fc.bls_rjtdetail", FT_UINT8, BASE_HEX,
1214            VALS (fc_bls_barjt_det_val), 0x0, "", HFILL}},
1215         { &hf_fc_bls_vendor,
1216           {"Vendor Unique Reason", "fc.bls_vnduniq", FT_UINT8, BASE_HEX, NULL,
1217            0x0, "", HFILL}},
1218         { &hf_fc_fctl_exchange_responder,
1219           {"ExgRpd", "fc.fctl.exchange_responder", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_exchange_responder),
1220            FC_FCTL_EXCHANGE_RESPONDER, "Exchange Responder?", HFILL}},
1221         { &hf_fc_fctl_seq_recipient,
1222           {"SeqRec", "fc.fctl.seq_recipient", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_seq_recipient),
1223            FC_FCTL_SEQ_RECIPIENT, "Seq Recipient?", HFILL}},
1224         { &hf_fc_fctl_exchange_first,
1225           {"ExgFst", "fc.fctl.exchange_first", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_exchange_first),
1226            FC_FCTL_EXCHANGE_FIRST, "First Exchange?", HFILL}},
1227         { &hf_fc_fctl_exchange_last,
1228           {"ExgLst", "fc.fctl.exchange_last", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_exchange_last),
1229            FC_FCTL_EXCHANGE_LAST, "Last Exchange?", HFILL}},
1230         { &hf_fc_fctl_seq_last,
1231           {"SeqLst", "fc.fctl.seq_last", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_seq_last),
1232            FC_FCTL_SEQ_LAST, "Last Sequence?", HFILL}},
1233         { &hf_fc_fctl_priority,
1234           {"Pri", "fc.fctl.priority", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_priority),
1235            FC_FCTL_PRIORITY, "Priority", HFILL}},
1236         { &hf_fc_fctl_transfer_seq_initiative,
1237           {"TSI", "fc.fctl.transfer_seq_initiative", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_transfer_seq_initiative),
1238            FC_FCTL_TRANSFER_SEQ_INITIATIVE, "Transfer Seq Initiative", HFILL}},
1239         { &hf_fc_fctl_rexmitted_seq,
1240           {"RetSeq", "fc.fctl.rexmitted_seq", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_rexmitted_seq),
1241            FC_FCTL_REXMITTED_SEQ, "Retransmitted Sequence", HFILL}},
1242         { &hf_fc_fctl_rel_offset,
1243           {"RelOff", "fc.fctl.rel_offset", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_rel_offset),
1244            FC_FCTL_REL_OFFSET, "rel offset", HFILL}},
1245         { &hf_fc_fctl_last_data_frame,
1246           {"LDF", "fc.fctl.last_data_frame", FT_UINT24, BASE_HEX, VALS(last_data_frame_vals),
1247            FC_FCTL_LAST_DATA_FRAME_MASK, "Last Data Frame?", HFILL}},
1248         { &hf_fc_fctl_ack_0_1,
1249           {"A01", "fc.fctl.ack_0_1", FT_UINT24, BASE_HEX, VALS(ack_0_1_vals),
1250            FC_FCTL_ACK_0_1_MASK, "Ack 0/1 value", HFILL}},
1251         { &hf_fc_fctl_abts_ack,
1252           {"AA", "fc.fctl.abts_ack", FT_UINT24, BASE_HEX, VALS(abts_ack_vals),
1253            FC_FCTL_ABTS_MASK, "ABTS ACK values", HFILL}},
1254         { &hf_fc_fctl_abts_not_ack,
1255           {"AnA", "fc.fctl.abts_not_ack", FT_UINT24, BASE_HEX, VALS(abts_not_ack_vals),
1256            FC_FCTL_ABTS_MASK, "ABTS not ACK vals", HFILL}},
1257         { &hf_fc_exchange_first_frame,
1258           { "Exchange First In", "fc.exchange_first_frame", FT_FRAMENUM, BASE_NONE, NULL,
1259            0, "The first frame of this exchange is in this frame", HFILL }},
1260         { &hf_fc_exchange_last_frame,
1261           { "Exchange Last In", "fc.exchange_last_frame", FT_FRAMENUM, BASE_NONE, NULL,
1262            0, "The last frame of this exchange is in this frame", HFILL }},
1263         { &hf_fc_time,
1264           { "Time from Exchange First", "fc.time", FT_RELATIVE_TIME, BASE_NONE, NULL,
1265            0, "Time since the first frame of the Exchange", HFILL }},
1266     };
1267
1268     /* Setup protocol subtree array */
1269     static gint *ett[] = {
1270         &ett_fc,
1271         &ett_fcbls,
1272         &ett_fctl
1273     };
1274
1275     module_t *fc_module;
1276
1277     /* Register the protocol name and description */
1278     proto_fc = proto_register_protocol ("Fibre Channel", "FC", "fc");
1279     register_dissector ("fc", dissect_fc, proto_fc);
1280     fc_tap = register_tap("fc");
1281
1282     /* Required function calls to register the header fields and subtrees used */
1283     proto_register_field_array(proto_fc, hf, array_length(hf));
1284     proto_register_subtree_array(ett, array_length(ett));
1285
1286     fcftype_dissector_table = register_dissector_table ("fc.ftype",
1287                                                         "FC Frame Type",
1288                                                         FT_UINT8, BASE_HEX);
1289
1290     /* Register preferences */
1291     fc_module = prefs_register_protocol (proto_fc, NULL);
1292     prefs_register_bool_preference (fc_module,
1293                                     "reassemble",
1294                                     "Reassemble multi-frame sequences",
1295                                     "If enabled, reassembly of multi-frame "
1296                                     "sequences is done",
1297                                     &fc_reassemble);
1298     prefs_register_uint_preference (fc_module,
1299                                     "max_frame_size", "Max FC Frame Size",
1300                                     "This is the size of non-last frames in a "
1301                                     "multi-frame sequence", 10,
1302                                     &fc_max_frame_size);
1303
1304     register_init_routine(fc_defragment_init);
1305     register_init_routine (fc_exchange_init_protocol);
1306 }
1307
1308
1309 /* If this dissector uses sub-dissector registration add a registration routine.
1310    This format is required because a script is used to find these routines and
1311    create the code that calls these routines.
1312 */
1313 void
1314 proto_reg_handoff_fc (void)
1315 {
1316     dissector_handle_t fc_handle;
1317
1318     fc_handle = create_dissector_handle (dissect_fc, proto_fc);
1319
1320     data_handle = find_dissector("data");
1321 }