epan/dissectors/packet-fcct.c

   1 /* packet-fcct.c
   2  * Routines for FC Common Transport Protocol (used by GS3 services)
   3  * Copyright 2001, Dinesh G Dutt <ddutt@andiamo.com>
   4  *
   5  * $Id$
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  24  */
  25
  26 #include "config.h"
  27
  28 #include <glib.h>
  29
  30 #include <epan/packet.h>
  31 #include <epan/to_str.h>
  32 #include <epan/etypes.h>
  33 #include <epan/conversation.h>
  34 #include "packet-scsi.h"
  35 #include "packet-fc.h"
  36 #include "packet-fcct.h"
  37
  38 /* Initialize the protocol and registered fields */
  39 static int proto_fcct           = -1;
  40 static int hf_fcct_revision     = -1;
  41 static int hf_fcct_inid         = -1;
  42 static int hf_fcct_gstype       = -1;
  43 static int hf_fcct_gssubtype    = -1;
  44 static int hf_fcct_options      = -1;
  45 static int hf_fcct_server       = -1; /* derived field */
  46
  47 /* Extended preamble fields */
  48 #if 0
  49 static int hf_fcct_ext_said     = -1;
  50 static int hf_fcct_ext_tid      = -1;
  51 static int hf_fcct_ext_reqname  = -1;
  52 static int hf_fcct_ext_tstamp   = -1;
  53 static int hf_fcct_ext_authblk  = -1;
  54 #endif
  55
  56 /* Initialize the subtree pointers */
  57 static gint ett_fcct = -1;
  58 static gint ett_fcct_ext = -1;  /* for the extended header */
  59
  60 const value_string fc_ct_rjt_code_vals [] = {
  61     {FCCT_RJT_INVCMDCODE, "Invalid Cmd Code"},
  62     {FCCT_RJT_INVVERSION, "Invalid Version Level"},
  63     {FCCT_RJT_LOGICALERR, "Logical Error"},
  64     {FCCT_RJT_INVSIZE,    "Invalid CT_IU Size"},
  65     {FCCT_RJT_LOGICALBSY, "Logical Busy"},
  66     {FCCT_RJT_PROTOERR,   "Protocol Error"},
  67     {FCCT_RJT_GENFAIL,    "Unable to Perform Cmd"},
  68     {FCCT_RJT_CMDNOTSUPP, "Cmd Not Supported"},
  69     {0, NULL},
  70 };
  71
  72 const value_string fc_ct_gstype_vals[] = {
  73     {FCCT_GSTYPE_KEYSVC, "Key Service"},
  74     {FCCT_GSTYPE_ALIASSVC, "Alias Service"},
  75     {FCCT_GSTYPE_MGMTSVC, "Management Service"},
  76     {FCCT_GSTYPE_TIMESVC, "Time Service"},
  77     {FCCT_GSTYPE_DIRSVC, "Directory Service"},
  78     {FCCT_GSTYPE_FCTLR, "Fabric Controller"},
  79     {FCCT_GSTYPE_VENDOR, "Vendor-Specific"},
  80     {0, NULL},
  81 };
  82
  83 const value_string fc_ct_gsserver_vals[] = {
  84     {FCCT_GSRVR_DNS, "dNS"},
  85     {FCCT_GSRVR_IP,  "IP"},
  86     {FCCT_GSRVR_FCS, "Fabric Config Server"},
  87     {FCCT_GSRVR_UNS, "Unzoned Name Server"},
  88     {FCCT_GSRVR_FZS, "Fabric Zone Server"},
  89     {FCCT_GSRVR_TS,  "Time Server"},
  90     {FCCT_GSRVR_KS,  "Key Server"},
  91     {FCCT_GSRVR_AS,  "Alias Server"},
  92     {FCCT_GSRVR_FCTLR, "Fabric Controller"},
  93     {0, NULL},
  94 };
  95
  96 static dissector_table_t fcct_gserver_table;
  97 static dissector_handle_t data_handle;
  98
  99 guint8
 100 get_gs_server (guint8 gstype, guint8 gssubtype)
 101 {
 102     switch (gstype) {
 103     case FCCT_GSTYPE_KEYSVC:
 104         return FCCT_GSRVR_KS;
 105     case FCCT_GSTYPE_ALIASSVC:
 106         if (gssubtype == FCCT_GSSUBTYPE_AS)
 107             return FCCT_GSRVR_AS;
 108         return FCCT_GSRVR_UNKNOWN;
 109     case FCCT_GSTYPE_MGMTSVC:
 110         if (gssubtype == FCCT_GSSUBTYPE_FCS)
 111             return FCCT_GSRVR_FCS;
 112         else if (gssubtype == FCCT_GSSUBTYPE_UNS)
 113             return FCCT_GSRVR_UNS;
 114         else if (gssubtype == FCCT_GSSUBTYPE_FZS)
 115             return FCCT_GSRVR_FZS;
 116         else return FCCT_GSRVR_UNKNOWN;
 117     case FCCT_GSTYPE_TIMESVC:
 118         if (gssubtype == FCCT_GSSUBTYPE_TS)
 119             return FCCT_GSRVR_TS;
 120         return FCCT_GSRVR_UNKNOWN;
 121     case FCCT_GSTYPE_DIRSVC:
 122         if (gssubtype == FCCT_GSSUBTYPE_DNS)
 123             return FCCT_GSRVR_DNS;
 124         else if (gssubtype == FCCT_GSSUBTYPE_IP)
 125             return FCCT_GSRVR_IP;
 126         return FCCT_GSRVR_UNKNOWN;
 127     case FCCT_GSRVR_FCTLR:
 128          if (gssubtype == FCCT_GSSUBTYPE_FCTLR)
 129               return (FCCT_GSRVR_FCTLR);
 130          else return (FCCT_GSRVR_UNKNOWN);
 131     default:
 132         return FCCT_GSRVR_UNKNOWN;
 133     }
 134 }
 135
 136 /* Code to actually dissect the packets */
 137 static void
 138 dissect_fcct (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 139 {
 140
 141 /* Set up structures needed to add the protocol subtree and manage it */
 142     proto_item *ti;
 143     proto_tree *fcct_tree;
 144     tvbuff_t *next_tvb;
 145     int in_id,
 146         offset = 0;
 147     guint8 server;
 148     fc_ct_preamble cthdr;
 149
 150     /* Make entries in Protocol column and Info column on summary display */
 151     col_set_str(pinfo->cinfo, COL_PROTOCOL, "FC_CT");
 152
 153     /*
 154       cthdr.revision = tvb_get_guint8 (tvb, offset++);
 155       cthdr.in_id = tvb_get_ntoh24 (tvb, offset);
 156       offset += 3;
 157
 158       cthdr.gstype = tvb_get_guint8 (tvb, offset++);
 159       cthdr.options = tvb_get_guint8 (tvb, offset++);
 160     */
 161     tvb_memcpy (tvb, (guint8 *)&cthdr, offset, FCCT_PRMBL_SIZE);
 162     cthdr.revision = tvb_get_guint8 (tvb, offset++);
 163     cthdr.in_id = tvb_get_ntoh24 (tvb, offset);
 164     cthdr.opcode = g_ntohs (cthdr.opcode);
 165     cthdr.maxres_size = g_ntohs (cthdr.maxres_size);
 166
 167     if (cthdr.opcode < FCCT_MSG_REQ_MAX) {
 168         col_append_str (pinfo->cinfo, COL_INFO, " Request");
 169     }
 170     else if (cthdr.opcode == FCCT_MSG_ACC) {
 171         col_append_str (pinfo->cinfo, COL_INFO, " Accept");
 172     }
 173     else if (cthdr.opcode == FCCT_MSG_RJT) {
 174         col_append_fstr (pinfo->cinfo, COL_INFO, " Reject (%s)",
 175                             val_to_str (cthdr.rjt_code, fc_ct_rjt_code_vals, "0x%x"));
 176     }
 177     else {
 178         col_append_str (pinfo->cinfo, COL_INFO, " Reserved");
 179     }
 180
 181     in_id = cthdr.in_id;
 182     in_id = g_htonl (in_id) >> 8;
 183
 184     /* Determine server */
 185     server = get_gs_server (cthdr.gstype, cthdr.gssubtype);
 186
 187     if (tree) {
 188         offset = 0;
 189         ti = proto_tree_add_protocol_format (tree, proto_fcct, tvb, 0, FCCT_PRMBL_SIZE,
 190                                              "FC_CT");
 191         fcct_tree = proto_item_add_subtree (ti, ett_fcct);
 192
 193         proto_tree_add_item (fcct_tree, hf_fcct_revision, tvb, offset++,
 194                              sizeof (guint8), ENC_BIG_ENDIAN);
 195         proto_tree_add_string (fcct_tree, hf_fcct_inid, tvb, offset, 3,
 196                                fc_to_str ((guint8 *)&in_id));
 197         offset += 3; /* sizeof FC address */
 198
 199         proto_tree_add_item (fcct_tree, hf_fcct_gstype, tvb, offset++,
 200                              sizeof (guint8), ENC_BIG_ENDIAN);
 201         proto_tree_add_item (fcct_tree, hf_fcct_gssubtype, tvb, offset,
 202                              sizeof (guint8), ENC_BIG_ENDIAN);
 203         proto_tree_add_uint (fcct_tree, hf_fcct_server, tvb, offset++, 1,
 204                              server);
 205         proto_tree_add_item (fcct_tree, hf_fcct_options, tvb, offset++,
 206                              sizeof (guint8), ENC_BIG_ENDIAN);
 207
 208     }
 209     /* We do not change the starting offset for the next protocol in the
 210      * chain since the fc_ct header is common to the sub-protocols.
 211      */
 212     next_tvb = tvb_new_subset_remaining (tvb, 0);
 213     if (!dissector_try_uint (fcct_gserver_table, server, next_tvb, pinfo,
 214                              tree)) {
 215         call_dissector (data_handle, next_tvb, pinfo, tree);
 216     }
 217 }
 218
 219 /* Register the protocol with Wireshark */
 220
 221 /* this format is require because a script is used to build the C function
 222    that calls all the protocol registration.
 223 */
 224
 225 void
 226 proto_register_fcct(void)
 227 {
 228
 229 /* Setup list of header fields  See Section 1.6.1 for details*/
 230     static hf_register_info hf[] = {
 231         { &hf_fcct_revision,
 232           {"Revision", "fcct.revision", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}},
 233         { &hf_fcct_inid,
 234           {"IN_ID", "fcct.in_id", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL}},
 235         { &hf_fcct_gstype,
 236           {"GS Type", "fcct.gstype", FT_UINT8, BASE_HEX, VALS(fc_ct_gstype_vals),
 237            0x0, NULL, HFILL}},
 238         { &hf_fcct_gssubtype,
 239           {"GS Subtype", "fcct.gssubtype", FT_UINT8, BASE_HEX, NULL, 0x0,
 240            NULL, HFILL}},
 241         { &hf_fcct_server,
 242           {"Server", "fcct.server", FT_UINT8, BASE_HEX,
 243            VALS (fc_ct_gsserver_vals), 0x0,
 244            "Derived from GS Type & Subtype fields", HFILL}},
 245         { &hf_fcct_options,
 246           {"Options", "fcct.options", FT_UINT8, BASE_HEX, NULL, 0x0, NULL,
 247            HFILL}},
 248 #if 0
 249         { &hf_fcct_ext_said,
 250           {"Auth SAID", "fcct.ext_said", FT_UINT32, BASE_HEX, NULL, 0x0, NULL,
 251            HFILL}},
 252         { &hf_fcct_ext_tid,
 253           {"Transaction ID", "fcct.ext_tid", FT_UINT32, BASE_HEX, NULL, 0x0, NULL,
 254            HFILL}},
 255         { &hf_fcct_ext_reqname,
 256           {"Requestor Port Name", "fcct.ext_reqnm", FT_BYTES, BASE_NONE, NULL,
 257            0x0, NULL, HFILL}},
 258         { &hf_fcct_ext_tstamp,
 259           {"Timestamp", "fcct.ext_tstamp", FT_BYTES, BASE_NONE, NULL, 0x0, NULL,
 260            HFILL}},
 261         { &hf_fcct_ext_authblk,
 262           {"Auth Hash Blk", "fcct.ext_authblk", FT_BYTES, BASE_NONE, NULL, 0x0,
 263            NULL, HFILL}},
 264 #endif
 265     };
 266
 267     /* Setup protocol subtree array */
 268     static gint *ett[] = {
 269         &ett_fcct,
 270         &ett_fcct_ext,
 271     };
 272
 273     /* Register the protocol name and description */
 274     proto_fcct = proto_register_protocol("Fibre Channel Common Transport", "FC_CT", "fcct");
 275
 276     /* Required function calls to register the header fields and subtrees used */
 277     proto_register_field_array(proto_fcct, hf, array_length(hf));
 278     proto_register_subtree_array(ett, array_length(ett));
 279
 280     fcct_gserver_table = register_dissector_table ("fcct.server",
 281                                                    "FCCT Server",
 282                                                    FT_UINT8, BASE_HEX);
 283 }
 284
 285 /* If this dissector uses sub-dissector registration add a registration routine.
 286    This format is required because a script is used to find these routines and
 287    create the code that calls these routines.
 288 */
 289 void
 290 proto_reg_handoff_fcct (void)
 291 {
 292     dissector_handle_t fcct_handle;
 293
 294     fcct_handle = create_dissector_handle (dissect_fcct, proto_fcct);
 295     dissector_add_uint("fc.ftype", FC_FTYPE_FCCT, fcct_handle);
 296
 297     data_handle = find_dissector ("data");
 298 }
 299
 300