/* packet-fcfzs.c
 * Routines for FC Fabric Zone Server
 * Copyright 2001, Dinesh G Dutt <ddutt@andiamo.com>
 *
 * $Id$
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"

#include <glib.h>

#include <epan/packet.h>
#include <epan/to_str.h>
#include <epan/wmem/wmem.h>
#include <epan/conversation.h>
#include <epan/etypes.h>
#include "packet-scsi.h"
#include "packet-fc.h"
#include "packet-fcct.h"
#include "packet-fcfzs.h"

/* Initialize the protocol and registered fields */
static int proto_fcfzs                     = -1;
static int hf_fcfzs_opcode                 = -1;
static int hf_fcfzs_gzc_vendor             = -1;
static int hf_fcfzs_gest_vendor            = -1;
static int hf_fcfzs_numzoneattrs           = -1;
static int hf_fcfzs_zonesetnmlen           = -1;
static int hf_fcfzs_zonesetname            = -1;
static int hf_fcfzs_numzones               = -1;
static int hf_fcfzs_numzonesetattrs        = -1;
static int hf_fcfzs_zonenmlen              = -1;
static int hf_fcfzs_zonename               = -1;
static int hf_fcfzs_nummbrs                = -1;
static int hf_fcfzs_nummbrentries          = -1;
static int hf_fcfzs_mbrid                  = -1;
/* static int hf_fcfzs_mbridlen               = -1; */
static int hf_fcfzs_mbrtype                = -1;
static int hf_fcfzs_reason                 = -1;
static int hf_fcfzs_rjtdetail              = -1;
static int hf_fcfzs_rjtvendor              = -1;
static int hf_fcfzs_maxres_size            = -1;
static int hf_fcfzs_mbrid_lun              = -1;
static int hf_fcfzs_gzc_flags              = -1;
static int hf_fcfzs_gzc_flags_hard_zones   = -1;
static int hf_fcfzs_gzc_flags_soft_zones   = -1;
static int hf_fcfzs_gzc_flags_zoneset_db   = -1;
static int hf_fcfzs_zone_state             = -1;
static int hf_fcfzs_soft_zone_set_enforced = -1;
static int hf_fcfzs_hard_zone_set_enforced = -1;

/* Initialize the subtree pointers */
static gint ett_fcfzs = -1;
static gint ett_fcfzs_gzc_flags = -1;
static gint ett_fcfzs_zone_state = -1;

typedef struct _fcfzs_conv_key {
    guint32 conv_idx;
} fcfzs_conv_key_t;

typedef struct _fcfzs_conv_data {
    guint32 opcode;
} fcfzs_conv_data_t;

static GHashTable *fcfzs_req_hash = NULL;

static dissector_handle_t data_handle;

/*
 * Hash Functions
 */
static gint
fcfzs_equal(gconstpointer v, gconstpointer w)
{
    const fcfzs_conv_key_t *v1 = (const fcfzs_conv_key_t *)v;
    const fcfzs_conv_key_t *v2 = (const fcfzs_conv_key_t *)w;

    return (v1->conv_idx == v2->conv_idx);
}

static guint
fcfzs_hash(gconstpointer v)
{
    const fcfzs_conv_key_t *key = (const fcfzs_conv_key_t *)v;
    guint val;

    val = key->conv_idx;

    return val;
}

/*
 * Protocol initialization
 */
static void
fcfzs_init_protocol(void)
{
    if (fcfzs_req_hash)
        g_hash_table_destroy(fcfzs_req_hash);

    fcfzs_req_hash = g_hash_table_new(fcfzs_hash, fcfzs_equal);
}

/* Code to actually dissect the packets */
static void
dissect_fcfzs_zoneset(tvbuff_t *tvb, proto_tree *tree, int offset)
{
    int numzones, nummbrs, i, j, len;

    /* The zoneset structure has the following format */
    /* zoneset name (len[not including pad], name, pad),
     * number of zones,
     * for each zone,
     *     Zone name (len[not including pad], name, pad), num zone mbrs
     *     for each zone mbr,
     *         zone mbr id type, zone mbr id (len, name, pad)
     */
    if (tree) {

        /* Zoneset Name */
        len = tvb_get_guint8(tvb, offset);
        proto_tree_add_item(tree, hf_fcfzs_zonesetnmlen, tvb, offset,
                            1, ENC_BIG_ENDIAN);
        proto_tree_add_item(tree, hf_fcfzs_zonesetname, tvb, offset+4,
                            len, ENC_ASCII|ENC_NA);
        offset += 4 + len + (4-(len % 4));


        /* Number of zones */
        numzones = tvb_get_ntohl(tvb, offset);
        proto_tree_add_item(tree, hf_fcfzs_numzones, tvb, offset, 4, ENC_BIG_ENDIAN);
        offset += 4;

        /* For each zone... */
        for (i = 0; i < numzones; i++) {
            len = tvb_get_guint8(tvb, offset);
            proto_tree_add_item(tree, hf_fcfzs_zonenmlen, tvb, offset,
                                1, ENC_BIG_ENDIAN);
            proto_tree_add_item(tree, hf_fcfzs_zonename, tvb, offset+4,
                                len, ENC_ASCII|ENC_NA);
            offset += 4 + len + (4-(len % 4));

            nummbrs = tvb_get_ntohl(tvb, offset);
            proto_tree_add_item(tree, hf_fcfzs_nummbrentries, tvb, offset,
                                4, ENC_BIG_ENDIAN);

            offset += 4;
            for (j = 0; j < nummbrs; j++) {
                proto_tree_add_item(tree, hf_fcfzs_mbrtype, tvb, offset, 1, ENC_BIG_ENDIAN);

                switch (tvb_get_guint8(tvb, offset)) {
                case FC_FZS_ZONEMBR_PWWN:
                case FC_FZS_ZONEMBR_NWWN:
                    proto_tree_add_string(tree, hf_fcfzs_mbrid, tvb,
                                          offset+4, 8,
                                          tvb_fcwwn_to_str(tvb, offset+4));
                    break;
                case FC_FZS_ZONEMBR_DP:
                    proto_tree_add_string_format(tree,
                                                 hf_fcfzs_mbrid,
                                                 tvb, offset+4, 3, " ",
                                                 "0x%x",
                                                 tvb_get_ntoh24(tvb,
                                                                offset+4));
                    break;
                case FC_FZS_ZONEMBR_FCID:
                    proto_tree_add_string(tree, hf_fcfzs_mbrid, tvb,
                                          offset+4, 4,
                                          tvb_fc_to_str(tvb, offset+4));
                    break;
                case FC_FZS_ZONEMBR_PWWN_LUN:
                    proto_tree_add_string(tree, hf_fcfzs_mbrid, tvb,
                                          offset+4, 8,
                                          tvb_fcwwn_to_str(tvb, offset+4));
                    proto_tree_add_item(tree, hf_fcfzs_mbrid_lun, tvb,
                                        offset+8, 8, ENC_NA);
                    break;
                case FC_FZS_ZONEMBR_DP_LUN:
                    proto_tree_add_string_format(tree,
                                                 hf_fcfzs_mbrid,
                                                 tvb, offset+4, 3, " ",
                                                 "0x%x",
                                                 tvb_get_ntoh24(tvb,
                                                                offset+4));
                    proto_tree_add_item(tree, hf_fcfzs_mbrid_lun, tvb,
                                        offset+4, 8, ENC_NA);
                    break;
                case FC_FZS_ZONEMBR_FCID_LUN:
                    proto_tree_add_string(tree, hf_fcfzs_mbrid, tvb,
                                          offset+4, 4,
                                          tvb_fc_to_str(tvb, offset+4));
                    proto_tree_add_item(tree, hf_fcfzs_mbrid_lun, tvb,
                                        offset+4, 8, ENC_NA);
                    break;
                default:
                    proto_tree_add_string(tree, hf_fcfzs_mbrid, tvb,
                                          offset+4, 8,
                                          "Unknown member type format");
                }
                offset += 12;
            }
        }
    }
}


static void
dissect_fcfzs_gzc(tvbuff_t *tvb, int offset, proto_tree *parent_tree, gboolean isreq)
{
    if (!isreq) {
        guint8 flags;
        proto_item *item = NULL;
        proto_tree *tree = NULL;

        flags = tvb_get_guint8(tvb, offset);
        if (parent_tree) {
            item = proto_tree_add_uint(parent_tree, hf_fcfzs_gzc_flags, tvb, offset, 1, flags);
            tree = proto_item_add_subtree(item, ett_fcfzs_gzc_flags);
        }

        proto_tree_add_boolean(tree, hf_fcfzs_gzc_flags_hard_zones, tvb, offset, 1, flags);
        if (flags & 0x80) {
            proto_item_append_text(item, "  Hard Zones");
        }
        flags &= (~( 0x80 ));

        proto_tree_add_boolean(tree, hf_fcfzs_gzc_flags_soft_zones, tvb, offset, 1, flags);
        if (flags & 0x40) {
            proto_item_append_text(item, "  Soft Zones");
        }
        flags &= (~( 0x40 ));

        proto_tree_add_boolean(tree, hf_fcfzs_gzc_flags_zoneset_db, tvb, offset, 1, flags);
        if (flags & 0x01) {
            proto_item_append_text(item, "  ZoneSet Database Available");
        }
        /*flags &= (~( 0x01 ));*/

        proto_tree_add_item(tree, hf_fcfzs_gzc_vendor, tvb, offset+4, 4, ENC_BIG_ENDIAN);
    }
}

static void
dissect_fcfzs_gest(tvbuff_t *tvb, proto_tree *parent_tree, gboolean isreq)
{
    int offset = 16;            /* past the fc_ct header */

    if (!isreq) {
        guint8 flags;
        proto_item *item = NULL;
        proto_tree *tree = NULL;

        flags = tvb_get_guint8(tvb, offset);
        if (parent_tree) {
            item = proto_tree_add_uint(parent_tree, hf_fcfzs_zone_state, tvb, offset, 1, flags);
            tree = proto_item_add_subtree(item, ett_fcfzs_zone_state);
        }

        proto_tree_add_boolean(tree, hf_fcfzs_soft_zone_set_enforced, tvb, offset, 1, flags);
        if (flags & 0x80) {
            proto_item_append_text(item, "  Soft Zone Set Enforced");
        }
        flags &= (~( 0x80 ));

        proto_tree_add_boolean(tree, hf_fcfzs_hard_zone_set_enforced, tvb, offset, 1, flags);
        if (flags & 0x40) {
            proto_item_append_text(item, "  Hard Zone Set Enforced");
        }
        /*flags &= (~( 0x40 ));*/


        proto_tree_add_item(parent_tree, hf_fcfzs_gest_vendor, tvb, offset+4, 4, ENC_BIG_ENDIAN);
    }
}

static void
dissect_fcfzs_gzsn(tvbuff_t *tvb, proto_tree *tree, gboolean isreq)
{
    int numrec, i, len;
    int offset = 16;            /* past the fc_ct header */

    if (tree) {
        if (!isreq) {
            numrec = tvb_get_ntohl(tvb, offset);

            proto_tree_add_item(tree, hf_fcfzs_numzonesetattrs, tvb, offset,
                                4, ENC_BIG_ENDIAN);

            offset += 4;
            for (i = 0; i < numrec; i++) {
                len = tvb_get_guint8(tvb, offset);
                proto_tree_add_item(tree, hf_fcfzs_zonesetnmlen, tvb, offset,
                                    1, ENC_BIG_ENDIAN);
                proto_tree_add_item(tree, hf_fcfzs_zonesetname, tvb, offset+1,
                                    len, ENC_ASCII|ENC_NA);
                offset += len + 1 + (len % 4);
                proto_tree_add_item(tree, hf_fcfzs_numzones, tvb, offset,
                                    4, ENC_BIG_ENDIAN);
                offset += 4;
            }
        }
    }
}

static void
dissect_fcfzs_gzd(tvbuff_t *tvb, proto_tree *tree, gboolean isreq)
{
    int numrec, i, len;
    int offset = 16;            /* past the fc_ct header */

    if (tree) {
        if (isreq) {
            len = tvb_get_guint8(tvb, offset);
            proto_tree_add_item(tree, hf_fcfzs_zonesetnmlen, tvb, offset,
                                1, ENC_BIG_ENDIAN);
            proto_tree_add_item(tree, hf_fcfzs_zonesetname, tvb, offset+1,
                                len, ENC_ASCII|ENC_NA);
        }
        else {
            numrec = tvb_get_ntohl(tvb, offset);

            proto_tree_add_item(tree, hf_fcfzs_numzoneattrs, tvb, offset,
                                4, ENC_BIG_ENDIAN);

            offset += 4;
            for (i = 0; i < numrec; i++) {
                len = tvb_get_guint8(tvb, offset);
                proto_tree_add_item(tree, hf_fcfzs_zonenmlen, tvb, offset,
                                    1, ENC_BIG_ENDIAN);
                proto_tree_add_item(tree, hf_fcfzs_zonename, tvb, offset+1,
                                    len, ENC_ASCII|ENC_NA);
                offset += len + 1 + (len % 4);
                proto_tree_add_item(tree, hf_fcfzs_nummbrs, tvb, offset,
                                    4, ENC_BIG_ENDIAN);
                offset += 4;
            }
        }
    }
}

static void
dissect_fcfzs_gzm(tvbuff_t *tvb, proto_tree *tree, gboolean isreq)
{
    int numrec, i, len;
    int offset = 16;            /* past the fc_ct header */

    if (tree) {
        if (isreq) {
            len = tvb_get_guint8(tvb, offset);
            proto_tree_add_item(tree, hf_fcfzs_zonenmlen, tvb, offset,
                                1, ENC_BIG_ENDIAN);
            proto_tree_add_item(tree, hf_fcfzs_zonename, tvb, offset+1,
                                len, ENC_ASCII|ENC_NA);
        }
        else {
            numrec = tvb_get_ntohl(tvb, offset);

            proto_tree_add_item(tree, hf_fcfzs_nummbrentries, tvb, offset,
                                4, ENC_BIG_ENDIAN);
            offset += 4;
            for (i = 0; i < numrec; i++) {
                proto_tree_add_item(tree, hf_fcfzs_mbrtype, tvb, offset, 1, ENC_BIG_ENDIAN);
                switch (tvb_get_guint8(tvb, offset)) {
                case FC_FZS_ZONEMBR_PWWN:
                case FC_FZS_ZONEMBR_NWWN:
                    proto_tree_add_string(tree, hf_fcfzs_mbrid, tvb,
                                          offset+4, 8,
                                          tvb_fcwwn_to_str(tvb, offset+4));
                    break;
                case FC_FZS_ZONEMBR_DP:
                    proto_tree_add_string_format(tree,
                                                 hf_fcfzs_mbrid,
                                                 tvb, offset+4, 3, " ",
                                                 "0x%x",
                                                 tvb_get_ntoh24(tvb,
                                                                offset+4));
                    break;
                case FC_FZS_ZONEMBR_FCID:
                    proto_tree_add_string(tree, hf_fcfzs_mbrid, tvb,
                                          offset+4, 4,
                                          tvb_fc_to_str(tvb, offset+4));
                    break;
                default:
                    proto_tree_add_string(tree, hf_fcfzs_mbrid, tvb,
                                          offset+4, 8,
                                          "Unknown member type format");
                }
                offset += 12;
            }
        }
    }
}

static void
dissect_fcfzs_gazs(tvbuff_t *tvb, proto_tree *tree, gboolean isreq)
{
    int offset = 16;            /* past the fc_ct header */

    if (tree) {
        if (!isreq) {
            dissect_fcfzs_zoneset(tvb, tree, offset);
        }
    }
}

static void
dissect_fcfzs_gzs(tvbuff_t *tvb, proto_tree *tree, gboolean isreq)
{
    int offset = 16;            /* past the fc_ct header */
    int len;

    if (tree) {
        if (isreq) {
            len = tvb_get_guint8(tvb, offset);
            proto_tree_add_item(tree, hf_fcfzs_zonesetnmlen, tvb, offset,
                                1, ENC_BIG_ENDIAN);
            proto_tree_add_item(tree, hf_fcfzs_zonesetname, tvb, offset+4,
                                len, ENC_ASCII|ENC_NA);
        }
        else {
            dissect_fcfzs_zoneset(tvb, tree, offset);
        }
    }
}

static void
dissect_fcfzs_adzs(tvbuff_t *tvb, proto_tree *tree, gboolean isreq)
{
    int offset = 16;            /* past the fc_ct header */

    if (tree) {
        if (isreq) {
            dissect_fcfzs_zoneset(tvb, tree, offset);
        }
    }
}

static void
dissect_fcfzs_azsd(tvbuff_t *tvb, proto_tree *tree, gboolean isreq)
{
    int offset = 16;            /* past the fc_ct header */

    if (tree) {
        if (isreq) {
            dissect_fcfzs_zoneset(tvb, tree, offset);
        }
    }
}

static void
dissect_fcfzs_arzs(tvbuff_t *tvb, proto_tree *tree, gboolean isreq)
{
    int offset = 16;            /* past the fc_ct header */
    int len;

    if (tree) {
        if (isreq) {
            len = tvb_get_guint8(tvb, offset);
            proto_tree_add_item(tree, hf_fcfzs_zonesetnmlen, tvb, offset,
                                1, ENC_BIG_ENDIAN);
            proto_tree_add_item(tree, hf_fcfzs_zonesetname, tvb, offset+4,
                                len, ENC_ASCII|ENC_NA);
        }
    }
}

static void
dissect_fcfzs_dzs(tvbuff_t *tvb _U_, proto_tree *tree _U_, gboolean isreq _U_)
{
    /* Both req & successful response contain just the FC_CT header */
    return;
}

static void
dissect_fcfzs_arzm(tvbuff_t *tvb, proto_tree *tree, gboolean isreq)
{
    int numrec, i, len, plen;
    int offset = 16;            /* past the fc_ct header */

    if (tree) {
        if (isreq) {
            len = tvb_get_guint8(tvb, offset);
            proto_tree_add_item(tree, hf_fcfzs_zonenmlen, tvb, offset,
                                1, ENC_BIG_ENDIAN);
            proto_tree_add_item(tree, hf_fcfzs_zonename, tvb, offset+1,
                                len, ENC_ASCII|ENC_NA);

            len += (len % 4);
            plen = tvb_length(tvb) - offset - len;

            numrec = plen/12;   /* each mbr rec is 12 bytes long */

            offset += len;
            for (i = 0; i < numrec; i++) {
                proto_tree_add_item(tree, hf_fcfzs_mbrtype, tvb, offset, 1, ENC_BIG_ENDIAN);
                switch (tvb_get_guint8(tvb, offset)) {
                case FC_FZS_ZONEMBR_PWWN:
                case FC_FZS_ZONEMBR_NWWN:
                    proto_tree_add_string(tree, hf_fcfzs_mbrid, tvb,
                                          offset+4, 8,
                                          tvb_fcwwn_to_str(tvb, offset+4));
                    break;
                case FC_FZS_ZONEMBR_DP:
                    proto_tree_add_string_format(tree,
                                                 hf_fcfzs_mbrid,
                                                 tvb, offset+4, 3, " ",
                                                 "0x%x",
                                                 tvb_get_ntoh24(tvb,
                                                                offset+4));
                    break;
                case FC_FZS_ZONEMBR_FCID:
                    proto_tree_add_string(tree, hf_fcfzs_mbrid, tvb,
                                          offset+4, 4,
                                          tvb_fc_to_str(tvb, offset+4));
                    break;
                default:
                    proto_tree_add_string(tree, hf_fcfzs_mbrid, tvb,
                                          offset+4, 8,
                                          "Unknown member type format");
                }
                offset += 12;
            }
        }
    }
}

static void
dissect_fcfzs_arzd(tvbuff_t *tvb, proto_tree *tree, gboolean isreq)
{
    int offset = 16;            /* past the fc_ct header */
    int len;

    if (tree) {
        if (isreq) {
            len = tvb_get_guint8(tvb, offset);
            proto_tree_add_item(tree, hf_fcfzs_zonesetnmlen, tvb, offset,
                                1, ENC_BIG_ENDIAN);
            proto_tree_add_item(tree, hf_fcfzs_zonesetname, tvb, offset+4,
                                len, ENC_ASCII|ENC_NA);
            len += (len % 4);
            offset += len;

            len = tvb_get_guint8(tvb, offset);
            proto_tree_add_item(tree, hf_fcfzs_zonenmlen, tvb, offset, 1, ENC_BIG_ENDIAN);
            proto_tree_add_item(tree, hf_fcfzs_zonename, tvb, offset+4,
                                len, ENC_ASCII|ENC_NA);
        }
    }
}

static void
dissect_fcfzs_rjt(tvbuff_t *tvb, proto_tree *tree)
{
    int offset = 0;

    if (tree) {
        proto_tree_add_item(tree, hf_fcfzs_reason, tvb, offset+13, 1, ENC_BIG_ENDIAN);
        proto_tree_add_item(tree, hf_fcfzs_rjtdetail, tvb, offset+14, 1, ENC_BIG_ENDIAN);
        proto_tree_add_item(tree, hf_fcfzs_rjtvendor, tvb, offset+15, 1, ENC_BIG_ENDIAN);
    }
}

static void
dissect_fcfzs(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{

/* Set up structures needed to add the protocol subtree and manage it */
    proto_item        *ti;
    proto_tree        *fcfzs_tree    = NULL;
    int                offset        = 0;
    fc_ct_preamble     cthdr;
    int                opcode;
    int                failed_opcode = 0;
    conversation_t    *conversation;
    fcfzs_conv_data_t *cdata;
    fcfzs_conv_key_t   ckey, *req_key;
    gboolean           isreq         = TRUE;

    /* Make entries in Protocol column and Info column on summary display */
    col_set_str(pinfo->cinfo, COL_PROTOCOL, "Zone Server");


    tvb_memcpy(tvb, (guint8 *)&cthdr, offset, FCCT_PRMBL_SIZE);
    cthdr.revision = tvb_get_guint8(tvb, offset+1);
    cthdr.in_id = tvb_get_ntoh24(tvb, offset);
    cthdr.opcode = g_ntohs(cthdr.opcode);
    opcode = cthdr.opcode;
    cthdr.maxres_size = g_ntohs(cthdr.maxres_size);

    if (tree) {
        ti = proto_tree_add_protocol_format(tree, proto_fcfzs, tvb, 0,
                                            tvb_length(tvb),
                                            "Zone Server");
        fcfzs_tree = proto_item_add_subtree(ti, ett_fcfzs);
        proto_tree_add_item(fcfzs_tree, hf_fcfzs_opcode, tvb, offset+8, 2, ENC_BIG_ENDIAN);
        proto_tree_add_item(fcfzs_tree, hf_fcfzs_maxres_size, tvb, offset+10,
                            2, ENC_BIG_ENDIAN);
    }

    if ((opcode != FCCT_MSG_ACC) && (opcode != FCCT_MSG_RJT)) {
        conversation = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst,
                                         pinfo->ptype, pinfo->oxid,
                                         pinfo->rxid, NO_PORT2);
        if (!conversation) {
            conversation = conversation_new(pinfo->fd->num, &pinfo->src, &pinfo->dst,
                                            pinfo->ptype, pinfo->oxid,
                                            pinfo->rxid, NO_PORT2);
        }

        ckey.conv_idx = conversation->index;

        cdata = (fcfzs_conv_data_t *)g_hash_table_lookup(fcfzs_req_hash,
                                                         &ckey);
        if (cdata) {
            /* Since we never free the memory used by an exchange, this maybe a
             * case of another request using the same exchange as a previous
             * req.
             */
            cdata->opcode = opcode;
        }
        else {
            req_key = wmem_new(wmem_file_scope(), fcfzs_conv_key_t);
            req_key->conv_idx = conversation->index;

            cdata = wmem_new(wmem_file_scope(), fcfzs_conv_data_t);
            cdata->opcode = opcode;

            g_hash_table_insert(fcfzs_req_hash, req_key, cdata);
        }

        col_add_str(pinfo->cinfo, COL_INFO, val_to_str(opcode, fc_fzs_opcode_val,
                                                           "0x%x"));
    }
    else {
        /* Opcode is ACC or RJT */
        conversation = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst,
                                         pinfo->ptype, pinfo->oxid,
                                         pinfo->rxid, NO_PORT2);
        isreq = FALSE;
        if (!conversation) {
            if (opcode == FCCT_MSG_ACC) {
                col_add_str(pinfo->cinfo, COL_INFO,
                                val_to_str(opcode, fc_fzs_opcode_val,
                                           "0x%x"));
                /* No record of what this accept is for. Can't decode */
                proto_tree_add_text(fcfzs_tree, tvb, 0, tvb_length(tvb),
                                    "No record of Exchg. Unable to decode MSG_ACC");
                return;
            }
        }
        else {
            ckey.conv_idx = conversation->index;

            cdata = (fcfzs_conv_data_t *)g_hash_table_lookup(fcfzs_req_hash, &ckey);

            if (cdata != NULL) {
                if (opcode == FCCT_MSG_ACC)
                    opcode = cdata->opcode;
                else
                    failed_opcode = cdata->opcode;
            }

            if (opcode != FCCT_MSG_RJT) {
                col_add_fstr(pinfo->cinfo, COL_INFO, "MSG_ACC (%s)",
                                val_to_str(opcode,
                                        fc_fzs_opcode_val, "0x%x"));
            }
            else {
                col_add_fstr(pinfo->cinfo, COL_INFO, "MSG_RJT (%s)",
                                val_to_str(failed_opcode,
                                        fc_fzs_opcode_val, "0x%x"));
            }

            if ((cdata == NULL) && (opcode != FCCT_MSG_RJT)) {
                /* No record of what this accept is for. Can't decode */
                proto_tree_add_text(fcfzs_tree, tvb, 0, tvb_length(tvb),
                                    "No record of Exchg. Unable to decode MSG_ACC/RJT");
                return;
            }
        }
    }

    switch (opcode) {
    case FCCT_MSG_RJT:
        dissect_fcfzs_rjt(tvb, fcfzs_tree);
        break;
    case FC_FZS_GZC:
        dissect_fcfzs_gzc(tvb, 16, fcfzs_tree, isreq);
        break;
    case FC_FZS_GEST:
        dissect_fcfzs_gest(tvb, fcfzs_tree, isreq);
        break;
    case FC_FZS_GZSN:
        dissect_fcfzs_gzsn(tvb, fcfzs_tree, isreq);
        break;
    case FC_FZS_GZD:
        dissect_fcfzs_gzd(tvb, fcfzs_tree, isreq);
        break;
    case FC_FZS_GZM:
        dissect_fcfzs_gzm(tvb, fcfzs_tree, isreq);
        break;
    case FC_FZS_GAZS:
        dissect_fcfzs_gazs(tvb, fcfzs_tree, isreq);
        break;
    case FC_FZS_GZS:
        dissect_fcfzs_gzs(tvb, fcfzs_tree, isreq);
        break;
    case FC_FZS_ADZS:
        dissect_fcfzs_adzs(tvb, fcfzs_tree, isreq);
        break;
    case FC_FZS_AZSD:
        dissect_fcfzs_azsd(tvb, fcfzs_tree, isreq);
        break;
    case FC_FZS_AZS:
        dissect_fcfzs_arzs(tvb, fcfzs_tree, isreq);
        break;
    case FC_FZS_DZS:
        dissect_fcfzs_dzs(tvb, fcfzs_tree, isreq);
        break;
    case FC_FZS_AZM:
        dissect_fcfzs_arzm(tvb, fcfzs_tree, isreq);
        break;
    case FC_FZS_AZD:
        dissect_fcfzs_arzd(tvb, fcfzs_tree, isreq);
        break;
    case FC_FZS_RZM:
        dissect_fcfzs_arzm(tvb, fcfzs_tree, isreq);
        break;
    case FC_FZS_RZD:
        dissect_fcfzs_arzd(tvb, fcfzs_tree, isreq);
        break;
    case FC_FZS_RZS:
        dissect_fcfzs_arzs(tvb, fcfzs_tree, isreq);
        break;
    default:
        call_dissector(data_handle, tvb, pinfo, tree);
        break;
    }
}

/* Register the protocol with Wireshark */

void
proto_register_fcfzs(void)
{

    static hf_register_info hf[] = {
        { &hf_fcfzs_opcode,
          {"Opcode", "fcfzs.opcode",
           FT_UINT16, BASE_HEX, VALS(fc_fzs_opcode_val), 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_gzc_vendor,
          {"Vendor Specific Flags", "fcfzs.gzc.vendor",
           FT_UINT32, BASE_HEX, NULL, 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_gest_vendor,
          {"Vendor Specific State", "fcfzs.gest.vendor",
           FT_UINT32, BASE_HEX, NULL, 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_numzoneattrs,
          {"Number of Zone Attribute Entries", "fcfzs.zone.numattrs",
           FT_UINT32, BASE_DEC, NULL, 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_zonesetnmlen,
          {"Zone Set Name Length", "fcfzs.zoneset.namelen",
           FT_UINT8, BASE_DEC, NULL, 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_zonesetname,
          {"Zone Set Name", "fcfzs.zoneset.name",
           FT_STRING, BASE_NONE, NULL, 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_numzones,
          {"Number of Zones", "fcfzs.zoneset.numzones",
           FT_UINT32, BASE_DEC, NULL, 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_numzonesetattrs,
          {"Number of Zone Set Attribute Entries", "fcfzs.zoneset.numattrs",
           FT_UINT32, BASE_DEC, NULL, 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_zonenmlen,
          {"Zone Name Length", "fcfzs.zone.namelen",
           FT_UINT8, BASE_DEC, NULL, 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_zonename,
          {"Zone Name", "fcfzs.zone.name",
           FT_STRING, BASE_NONE, NULL, 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_nummbrs,
          {"Number of Zone Members", "fcfzs.zone.nummbrs",
           FT_UINT32, BASE_DEC, NULL, 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_nummbrentries,
          {"Number of Zone Member Attribute Entries", "fcfzs.zonembr.numattrs",
           FT_UINT32, BASE_DEC, NULL, 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_mbrtype,
          {"Zone Member Identifier Type", "fcfzs.zonembr.idtype",
           FT_UINT8, BASE_HEX, VALS(fc_fzs_zonembr_type_val), 0x0,
           NULL, HFILL}},

#if 0
        { &hf_fcfzs_mbridlen,
          {"Zone Member Identifier Length", "fcfzs.zonembr.idlen",
           FT_UINT8, BASE_DEC, NULL, 0x0,
           NULL, HFILL}},
#endif

        { &hf_fcfzs_mbrid,
          {"Zone Member Identifier", "fcfzs.zone.mbrid",
           FT_STRING, BASE_NONE, NULL, 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_reason,
          {"Reason Code", "fcfzs.reason",
           FT_UINT8, BASE_HEX, VALS(fc_ct_rjt_code_vals), 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_rjtdetail,
          {"Reason Code Explanation", "fcfzs.rjtdetail",
           FT_UINT8, BASE_HEX, VALS(fc_fzs_rjt_code_val), 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_rjtvendor,
          {"Vendor Specific Reason", "fcfzs.rjtvendor",
           FT_UINT8, BASE_HEX, NULL, 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_maxres_size,
          {"Maximum/Residual Size", "fcfzs.maxres_size",
           FT_UINT16, BASE_DEC, NULL, 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_mbrid_lun,
          {"LUN", "fcfzs.zone.lun",
           FT_BYTES, BASE_NONE, NULL, 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_gzc_flags,
          {"Capabilities", "fcfzs.gzc.flags",
           FT_UINT8, BASE_HEX, NULL, 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_gzc_flags_hard_zones,
          {"Hard Zones", "fcfzs.gzc.flags.hard_zones",
           FT_BOOLEAN, 8, TFS(&tfs_supported_not_supported), 0x80,
           NULL, HFILL}},

        { &hf_fcfzs_gzc_flags_soft_zones,
          {"Soft Zones", "fcfzs.gzc.flags.soft_zones",
           FT_BOOLEAN, 8, TFS(&tfs_supported_not_supported), 0x40,
           NULL, HFILL}},

        { &hf_fcfzs_gzc_flags_zoneset_db,
          {"ZoneSet Database", "fcfzs.gzc.flags.zoneset_db",
           FT_BOOLEAN, 8, TFS(&tfs_available_not_available), 0x01,
           NULL, HFILL}},

        { &hf_fcfzs_zone_state,
          {"Zone State", "fcfzs.zone.state",
           FT_UINT8, BASE_HEX, NULL, 0x0,
           NULL, HFILL}},

        { &hf_fcfzs_soft_zone_set_enforced,
          {"Soft Zone Set", "fcfzs.soft_zone_set.enforced",
           FT_BOOLEAN, 8, TFS(&tfs_enforced_not_enforced), 0x80,
           NULL, HFILL}},

        { &hf_fcfzs_hard_zone_set_enforced,
          {"Hard Zone Set", "fcfzs.hard_zone_set.enforced",
           FT_BOOLEAN, 8, TFS(&tfs_enforced_not_enforced), 0x40,
           NULL, HFILL}},

    };

    static gint *ett[] = {
        &ett_fcfzs,
        &ett_fcfzs_gzc_flags,
        &ett_fcfzs_zone_state,
    };

    proto_fcfzs = proto_register_protocol("Fibre Channel Fabric Zone Server", "FC FZS", "fcfzs");

    proto_register_field_array(proto_fcfzs, hf, array_length(hf));
    proto_register_subtree_array(ett, array_length(ett));
    register_init_routine(&fcfzs_init_protocol);

}

void
proto_reg_handoff_fcfzs(void)
{
    dissector_handle_t fzs_handle;

    fzs_handle = create_dissector_handle(dissect_fcfzs, proto_fcfzs);
    dissector_add_uint("fcct.server", FCCT_GSRVR_FZS, fzs_handle);

    data_handle = find_dissector("data");
}


