epan/dissectors/packet-ismp.c

   1 /* packet-ismp.c
   2  * Routines for ISMP dissection
   3  * Enterasys Networks Home: http://www.enterasys.com/
   4  * Copyright 2003, Joshua Craig Douglas <jdouglas@enterasys.com>
   5  *
   6  * $Id$
   7  *
   8  * Wireshark - Network traffic analyzer
   9  * By Gerald Combs <gerald@wireshark.org>
  10  * Copyright 1998 Gerald Combs
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  25  */
  26
  27 #include "config.h"
  28
  29 #include <glib.h>
  30
  31 #include <epan/packet.h>
  32 #include <epan/strutil.h>
  33 #include <epan/etypes.h>
  34
  35
  36 /* Initialize the protocol and registered fields */
  37 static int proto_ismp = -1;
  38 static int hf_ismp_version = -1;
  39 static int hf_ismp_message_type = -1;
  40 static int hf_ismp_seq_num = -1;
  41 static int hf_ismp_code_length = -1;
  42 static int hf_ismp_auth_data = -1;
  43
  44 /* Enterasys/Cabletron Dicovery Protocol fields*/
  45 static int hf_ismp_edp = -1;
  46 static int hf_ismp_edp_version = -1;
  47 static int hf_ismp_edp_module_ip = -1;
  48 static int hf_ismp_edp_module_mac = -1;
  49 static int hf_ismp_edp_module_port = -1;
  50 static int hf_ismp_edp_chassis_mac =-1;
  51 static int hf_ismp_edp_chassis_ip = -1;
  52 static int hf_ismp_edp_device_type = -1;
  53 static int hf_ismp_edp_module_rev = -1;
  54 static int hf_ismp_edp_options = -1;
  55 static int hf_ismp_edp_sfs_option_unused1 = -1;
  56 static int hf_ismp_edp_sfs_option_sfssup = -1;
  57 static int hf_ismp_edp_sfs_option_lsp = -1;
  58 static int hf_ismp_edp_sfs_option_flood = -1;
  59 static int hf_ismp_edp_sfs_option_resolve = -1;
  60 static int hf_ismp_edp_sfs_option_unused2 = -1;
  61 static int hf_ismp_edp_sfs_option_tagflood = -1;
  62 static int hf_ismp_edp_sfs_option_calltap = -1;
  63 static int hf_ismp_edp_sfs_option_conmsg = -1;
  64 static int hf_ismp_edp_sfs_option_redun = -1;
  65 static int hf_ismp_edp_sfs_option_isolated = -1;
  66 static int hf_ismp_edp_sfs_option_uplink_switch = -1;
  67 static int hf_ismp_edp_sfs_option_uplink_core = -1;
  68 static int hf_ismp_edp_sfs_option_uplink_port = -1;
  69 static int hf_ismp_edp_sfs_option_uplink_flood = -1;
  70 static int hf_ismp_edp_rtr_option_ssr = -1;
  71 static int hf_ismp_edp_rtr_option_igmp = -1;
  72 static int hf_ismp_edp_rtr_option_rip = -1;
  73 static int hf_ismp_edp_rtr_option_bgp = -1;
  74 static int hf_ismp_edp_rtr_option_ospf = -1;
  75 static int hf_ismp_edp_rtr_option_dvmrp = -1;
  76 static int hf_ismp_edp_rtr_option_8021q = -1;
  77 static int hf_ismp_edp_rtr_option_gvrp = -1;
  78 static int hf_ismp_edp_rtr_option_gmrp = -1;
  79 static int hf_ismp_edp_rtr_option_igmp_snoop = -1;
  80 static int hf_ismp_edp_rtr_option_route = -1;
  81 static int hf_ismp_edp_rtr_option_trans = -1;
  82 static int hf_ismp_edp_rtr_option_level1 = -1;
  83 static int hf_ismp_edp_switch_option_8021q = -1;
  84 static int hf_ismp_edp_switch_option_gvrp = -1;
  85 static int hf_ismp_edp_switch_option_gmrp = -1;
  86 static int hf_ismp_edp_switch_option_igmp = -1;
  87 static int hf_ismp_edp_switch_option_route = -1;
  88 static int hf_ismp_edp_switch_option_trans = -1;
  89 static int hf_ismp_edp_switch_option_level1 = -1;
  90 static int hf_ismp_edp_end_station_option_dhcp = -1;
  91 static int hf_ismp_edp_end_station_option_dns = -1;
  92 static int hf_ismp_edp_end_station_option_ad = -1;
  93 static int hf_ismp_edp_num_neighbors = -1;
  94 static int hf_ismp_edp_neighbors = -1;
  95 static int hf_ismp_edp_num_tuples = -1;
  96 static int hf_ismp_edp_tuples = -1;
  97
  98
  99 /* Initialize the subtree pointers */
 100 static gint ett_ismp = -1;
 101 static gint ett_ismp_edp = -1;
 102 static gint ett_ismp_edp_options = -1;
 103 static gint ett_ismp_edp_neighbors = -1;
 104 static gint ett_ismp_edp_neighbors_leaf = -1;
 105 static gint ett_ismp_edp_tuples = -1;
 106 static gint ett_ismp_edp_tuples_leaf = -1;
 107
 108 /* ISMP TYPES */
 109 #define ISMPTYPE_EDP    2
 110
 111
 112 /* EDP DEVICE TYPES */
 113 #define EDP_DEVICE_TYPE_SFS17           1
 114 #define EDP_DEVICE_TYPE_SFS18           2
 115 #define EDP_DEVICE_TYPE_ROUTER          3
 116 #define EDP_DEVICE_TYPE_BRIDGE          4
 117 #define EDP_DEVICE_TYPE_VLANMAN         5
 118 #define EDP_DEVICE_TYPE_NTSERVER        6
 119 #define EDP_DEVICE_TYPE_NTCLIENT        7
 120 #define EDP_DEVICE_TYPE_WIN95           8
 121 #define EDP_DEVICE_TYPE_WIN98           9
 122 #define EDP_DEVICE_TYPE_UNIXSERVER      10
 123 #define EDP_DEVICE_TYPE_UNIXCLIENT      11
 124 #define EDP_DEVICE_TYPE_ACCESSPOINT     12
 125
 126
 127 static const value_string edp_device_types[] = {
 128         { EDP_DEVICE_TYPE_SFS17,       "Network Switch running SecureFast version 1.7 or lower" },
 129         { EDP_DEVICE_TYPE_SFS18,         "Network Switch running SecureFast version 1.8 or greater" },
 130         { EDP_DEVICE_TYPE_ROUTER,         "Router" },
 131         { EDP_DEVICE_TYPE_BRIDGE,         "Bridge" },
 132         { EDP_DEVICE_TYPE_VLANMAN,         "Cabletron VLAN Manager" },
 133         { EDP_DEVICE_TYPE_NTSERVER,         "Network Server (NT)" },
 134         { EDP_DEVICE_TYPE_NTCLIENT,    "Network Workstation (NT)" },
 135         { EDP_DEVICE_TYPE_WIN95,     "Windows95" },
 136         { EDP_DEVICE_TYPE_WIN98,        "Windows98" },
 137         { EDP_DEVICE_TYPE_UNIXSERVER,       "UNIX Server" },
 138         { EDP_DEVICE_TYPE_UNIXCLIENT, "UNIX Workstation" },
 139         { EDP_DEVICE_TYPE_ACCESSPOINT,     "Roamabout wireless access point" },
 140         { 0,                    NULL },
 141 };
 142
 143
 144 /* EDP SFS Options */
 145 #define EDP_SFS_OPTION_UNUSED1          0x1
 146 #define EDP_SFS_OPTION_SFSSUP           0x2
 147 #define EDP_SFS_OPTION_LSP              0x4
 148 #define EDP_SFS_OPTION_FLOOD            0x8
 149 #define EDP_SFS_OPTION_RESOLVE          0x10
 150 #define EDP_SFS_OPTION_UNUSED2          0x20
 151 #define EDP_SFS_OPTION_TAGFLOOD         0x40
 152 #define EDP_SFS_OPTION_CALLTAP          0x80
 153 #define EDP_SFS_OPTION_CONMSG           0x100
 154 #define EDP_SFS_OPTION_REDUN            0x200
 155 #define EDP_SFS_OPTION_ISOLATED         0x400
 156 #define EDP_SFS_OPTION_UPLINK_SWITCH    0x800
 157 #define EDP_SFS_OPTION_UPLINK_CORE      0x1000
 158 #define EDP_SFS_OPTION_UPLINK_PORT      0x2000
 159 #define EDP_SFS_OPTION_UPLINK_FLOOD     0x4000
 160
 161 /* EDP Router Options */
 162 #define EDP_RTR_OPTION_SSR              0x1
 163 #define EDP_RTR_OPTION_IGMP             0x2
 164 #define EDP_RTR_OPTION_RIP              0x4
 165 #define EDP_RTR_OPTION_BGP              0x8
 166 #define EDP_RTR_OPTION_OSPF             0x10
 167 #define EDP_RTR_OPTION_DVMRP            0x20
 168 #define EDP_RTR_OPTION_8021Q            0x40
 169 #define EDP_RTR_OPTION_GVRP             0x80
 170 #define EDP_RTR_OPTION_GMRP             0x100
 171 #define EDP_RTR_OPTION_IGMP_SNOOP       0x200
 172 #define EDP_RTR_OPTION_ROUTE            0x400
 173 #define EDP_RTR_OPTION_TRANS            0x800
 174 #define EDP_RTR_OPTION_LEVEL1           0x1000
 175
 176 /* EDP Switch Options */
 177 #define EDP_SWITCH_OPTION_8021Q         0x1
 178 #define EDP_SWITCH_OPTION_GVRP          0x2
 179 #define EDP_SWITCH_OPTION_GMRP          0x4
 180 #define EDP_SWITCH_OPTION_IGMP          0x8
 181 #define EDP_SWITCH_OPTION_ROUTE         0x10
 182 #define EDP_SWITCH_OPTION_TRANS         0x20
 183 #define EDP_SWITCH_OPTION_LEVEL1        0x40
 184
 185 /* EDP End Station and Server Options */
 186 #define EDP_END_STATION_OPTION_DHCP     0x1
 187 #define EDP_END_STATION_OPTION_DNS      0x2
 188 #define EDP_END_STATION_OPTION_AD       0x4
 189
 190 /* EDP Tuple Types */
 191 #define EDP_TUPLE_UNKNOWN               0
 192 #define EDP_TUPLE_HOLD                  1
 193 #define EDP_TUPLE_INT_NAME              2
 194 #define EDP_TUPLE_SYS_DESCRIPT  3
 195 #define EDP_TUPLE_IPX_ADDR              4
 196
 197 static const value_string edp_tuple_types[] =
 198 {
 199         { EDP_TUPLE_UNKNOWN,"Unknown" },
 200         { EDP_TUPLE_HOLD,"Hold Time" },
 201         { EDP_TUPLE_INT_NAME,"Interface Name" },
 202         { EDP_TUPLE_SYS_DESCRIPT,"System Description" },
 203         { EDP_TUPLE_IPX_ADDR,"IPX Address" },
 204         { 0,NULL }
 205 };
 206
 207 /* Is value set? */
 208 static const true_false_string is_set = {
 209         "set",
 210         "not set"
 211 };
 212
 213
 214 /* Function to dissect EDP portion of ISMP message */
 215 static void
 216 dissect_ismp_edp(tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *ismp_tree)
 217 {
 218         /* local variables used for EDP dissection */
 219         int neighbors_count = 0;
 220         int tuples_count = 0;
 221         guint16 device_type = 0;
 222         guint32 options = 0;
 223         guint16 num_neighbors = 0;
 224         guint16 num_tuples = 0;
 225         guint16 tuple_type = 0;
 226         guint16 tuple_length = 0;
 227
 228         /* Set up structures needed to add the protocol subtree and manage it */
 229         proto_item *edp_ti;
 230         proto_tree *edp_tree;
 231
 232         proto_item *edp_options_ti;
 233         proto_tree *edp_options_tree;
 234
 235         proto_item *edp_neighbors_ti;
 236         proto_tree *edp_neighbors_tree;
 237
 238         proto_item *edp_neighbors_leaf_ti;
 239         proto_tree *edp_neighbors_leaf_tree;
 240
 241         proto_item *edp_tuples_ti;
 242         proto_tree *edp_tuples_tree;
 243
 244         proto_item *edp_tuples_leaf_ti;
 245         proto_tree *edp_tuples_leaf_tree;
 246
 247         /* add column iformation marking this as EDP (Enterasys Discover Protocol */
 248         col_set_str(pinfo->cinfo, COL_PROTOCOL, "ISMP.EDP");
 249         col_clear(pinfo->cinfo, COL_INFO);
 250
 251         /* create display subtree for EDP */
 252         if (ismp_tree) {
 253                 edp_ti  = proto_tree_add_item(ismp_tree, hf_ismp_edp, tvb, offset,
 254                         tvb_length_remaining(tvb, offset), ENC_NA);
 255                 edp_tree = proto_item_add_subtree(edp_ti, ett_ismp_edp);
 256
 257                 col_add_fstr(pinfo->cinfo, COL_INFO, "MIP %s, MMAC %s, ifIdx %d",
 258                         tvb_ip_to_str(tvb, offset+2),
 259                         tvb_ether_to_str(tvb, offset+6),
 260                         tvb_get_ntohl(tvb, offset+12));
 261
 262                 proto_tree_add_item(edp_tree, hf_ismp_edp_version, tvb, offset, 2, ENC_BIG_ENDIAN);
 263                 offset += 2;
 264                 proto_tree_add_item(edp_tree, hf_ismp_edp_module_ip, tvb, offset, 4, ENC_BIG_ENDIAN);
 265                 offset += 4;
 266                 proto_tree_add_item(edp_tree, hf_ismp_edp_module_mac, tvb, offset, 6, ENC_NA);
 267                 offset += 6;
 268                 proto_tree_add_item(edp_tree, hf_ismp_edp_module_port, tvb, offset, 4, ENC_BIG_ENDIAN);
 269                 offset += 4;
 270                 proto_tree_add_item(edp_tree, hf_ismp_edp_chassis_mac, tvb, offset, 6, ENC_NA);
 271                 offset += 6;
 272                 proto_tree_add_item(edp_tree, hf_ismp_edp_chassis_ip, tvb, offset, 4, ENC_BIG_ENDIAN);
 273                 offset += 4;
 274                 device_type = tvb_get_ntohs(tvb, offset);
 275                 proto_tree_add_item(edp_tree, hf_ismp_edp_device_type, tvb, offset, 2, ENC_BIG_ENDIAN);
 276                 offset += 2;
 277                 proto_tree_add_uint_format_value(edp_tree, hf_ismp_edp_module_rev, tvb, offset, 4, tvb_get_ntohl(tvb, offset),
 278                         "%02x.%02x.%02x.%02x", tvb_get_guint8(tvb, offset),
 279                         tvb_get_guint8(tvb, offset+1), tvb_get_guint8(tvb, offset+2), tvb_get_guint8(tvb, offset+3));
 280                 offset += 4;
 281
 282                 /* create display subtree for EDP options */
 283                 options = tvb_get_ntohl(tvb, offset);
 284                 edp_options_ti = proto_tree_add_uint_format(edp_tree, hf_ismp_edp_options, tvb, offset, 4,
 285                         options,"Options: 0x%08x",options);
 286                 edp_options_tree = proto_item_add_subtree(edp_options_ti, ett_ismp_edp_options);
 287
 288                 /* depending on device_type, show the appropriate options */
 289                 switch (device_type) {
 290                         case EDP_DEVICE_TYPE_SFS17:
 291                         case EDP_DEVICE_TYPE_SFS18:
 292                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_uplink_flood, tvb, offset, 4, ENC_BIG_ENDIAN);
 293                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_uplink_port, tvb, offset, 4, ENC_BIG_ENDIAN);
 294                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_uplink_core, tvb, offset, 4, ENC_BIG_ENDIAN);
 295                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_uplink_switch, tvb, offset, 4, ENC_BIG_ENDIAN);
 296                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_isolated, tvb, offset, 4, ENC_BIG_ENDIAN);
 297                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_redun, tvb, offset, 4, ENC_BIG_ENDIAN);
 298                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_conmsg, tvb, offset, 4, ENC_BIG_ENDIAN);
 299                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_calltap, tvb, offset, 4, ENC_BIG_ENDIAN);
 300                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_tagflood, tvb, offset, 4, ENC_BIG_ENDIAN);
 301                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_unused2, tvb, offset, 4, ENC_BIG_ENDIAN);
 302                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_resolve, tvb, offset, 4, ENC_BIG_ENDIAN);
 303                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_flood, tvb, offset, 4, ENC_BIG_ENDIAN);
 304                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_lsp, tvb, offset, 4, ENC_BIG_ENDIAN);
 305                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_sfssup, tvb, offset, 4, ENC_BIG_ENDIAN);
 306                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_unused1, tvb, offset, 4, ENC_BIG_ENDIAN);
 307                                 break;
 308                         case EDP_DEVICE_TYPE_ROUTER:
 309                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_level1, tvb, offset, 4, ENC_BIG_ENDIAN);
 310                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_trans, tvb, offset, 4, ENC_BIG_ENDIAN);
 311                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_route, tvb, offset, 4, ENC_BIG_ENDIAN);
 312                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_igmp_snoop, tvb, offset, 4, ENC_BIG_ENDIAN);
 313                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_gmrp, tvb, offset, 4, ENC_BIG_ENDIAN);
 314                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_gvrp, tvb, offset, 4, ENC_BIG_ENDIAN);
 315                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_8021q, tvb, offset, 4, ENC_BIG_ENDIAN);
 316                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_dvmrp, tvb, offset, 4, ENC_BIG_ENDIAN);
 317                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_ospf, tvb, offset, 4, ENC_BIG_ENDIAN);
 318                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_bgp, tvb, offset, 4, ENC_BIG_ENDIAN);
 319                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_rip, tvb, offset, 4, ENC_BIG_ENDIAN);
 320                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_igmp, tvb, offset, 4, ENC_BIG_ENDIAN);
 321                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_ssr, tvb, offset, 4, ENC_BIG_ENDIAN);
 322                                 break;
 323                         case EDP_DEVICE_TYPE_BRIDGE:
 324                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_switch_option_level1, tvb, offset, 4, ENC_BIG_ENDIAN);
 325                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_switch_option_trans, tvb, offset, 4, ENC_BIG_ENDIAN);
 326                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_switch_option_route, tvb, offset, 4, ENC_BIG_ENDIAN);
 327                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_switch_option_igmp, tvb, offset, 4, ENC_BIG_ENDIAN);
 328                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_switch_option_gmrp, tvb, offset, 4, ENC_BIG_ENDIAN);
 329                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_switch_option_gvrp, tvb, offset, 4, ENC_BIG_ENDIAN);
 330                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_switch_option_8021q, tvb, offset, 4, ENC_BIG_ENDIAN);
 331                                 break;
 332                         case EDP_DEVICE_TYPE_VLANMAN:
 333                                 break;
 334                         case EDP_DEVICE_TYPE_NTSERVER:
 335                         case EDP_DEVICE_TYPE_NTCLIENT:
 336                         case EDP_DEVICE_TYPE_WIN95:
 337                         case EDP_DEVICE_TYPE_WIN98:
 338                         case EDP_DEVICE_TYPE_UNIXSERVER:
 339                         case EDP_DEVICE_TYPE_UNIXCLIENT:
 340                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_end_station_option_ad, tvb, offset, 4, ENC_BIG_ENDIAN);
 341                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_end_station_option_dns, tvb, offset, 4, ENC_BIG_ENDIAN);
 342                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_end_station_option_dhcp, tvb, offset, 4, ENC_BIG_ENDIAN);
 343                                 break;
 344                         case EDP_DEVICE_TYPE_ACCESSPOINT:
 345                         default:
 346                                 break;
 347                 }
 348                 offset += 4;
 349
 350                 /* determine the number of neighbors and create EDP neighbors subtree */
 351                 num_neighbors = tvb_get_ntohs(tvb, offset);
 352                 proto_tree_add_item(edp_tree, hf_ismp_edp_num_neighbors, tvb, offset, 2, ENC_BIG_ENDIAN);
 353                 offset += 2;
 354                 if (num_neighbors > 0)
 355                 {
 356                         edp_neighbors_ti = proto_tree_add_item(edp_tree, hf_ismp_edp_neighbors, tvb,
 357                                                                                 offset, num_neighbors*10, ENC_NA);
 358                         edp_neighbors_tree = proto_item_add_subtree(edp_neighbors_ti, ett_ismp_edp_neighbors);
 359                         while ( neighbors_count < num_neighbors && tvb_reported_length_remaining(tvb, offset) >= 10)
 360                         {
 361                                 edp_neighbors_leaf_ti = proto_tree_add_text(edp_neighbors_tree, tvb, offset, 10,
 362                                                                                 "Neighbor%d", (neighbors_count+1));
 363                                 edp_neighbors_leaf_tree = proto_item_add_subtree(edp_neighbors_leaf_ti, ett_ismp_edp_neighbors_leaf);
 364
 365                                 proto_tree_add_text(edp_neighbors_leaf_tree, tvb, offset, 6,
 366                                         "MAC Address: %s", tvb_ether_to_str(tvb, offset));
 367                                 proto_tree_add_text(edp_neighbors_leaf_tree, tvb, offset, 4,
 368                                         "Assigned Neighbor State 0x%04x", tvb_get_ntohl(tvb, offset));
 369                                 offset += 10;
 370                                 neighbors_count++;
 371                         }
 372                         if (neighbors_count != num_neighbors)
 373                         {
 374                                 proto_tree_add_text(edp_tree, tvb, offset, tvb_reported_length_remaining(tvb, offset),
 375                                 "MALFORMED PACKET");
 376                                 return;
 377                         }
 378                 }
 379
 380                 /* determine data remains, if so, count tuples
 381                    and create EDP tuples subtree */
 382                 if (tvb_reported_length_remaining(tvb, offset) != 0 &&
 383                         tvb_reported_length_remaining(tvb, offset) >= 2)
 384                 {
 385                         num_tuples = tvb_get_ntohs(tvb, offset);
 386                         proto_tree_add_item(edp_tree, hf_ismp_edp_num_tuples, tvb, offset, 2, ENC_BIG_ENDIAN);
 387                         offset += 2;
 388                 }
 389                 else if (tvb_reported_length_remaining(tvb, offset) > 0) {
 390                         proto_tree_add_text(edp_tree, tvb, offset,
 391                                 tvb_reported_length_remaining(tvb, offset), "MALFORMED PACKET");
 392                         return;
 393                 }
 394                 else
 395                 {
 396                         return;
 397                 }
 398
 399                 /* start populating tuple information */
 400                 if (num_tuples && tvb_reported_length_remaining(tvb, offset) >= 4)
 401                 {
 402                         edp_tuples_ti = proto_tree_add_bytes_format(edp_tree, hf_ismp_edp_tuples, tvb,
 403                                 offset, tvb_reported_length_remaining(tvb, offset), NULL, "Tuples");
 404                         edp_tuples_tree = proto_item_add_subtree(edp_tuples_ti, ett_ismp_edp_tuples);
 405
 406                         while ( (tuples_count < num_tuples) && (tvb_reported_length_remaining(tvb, offset) >= 4) )
 407                         {
 408
 409                                 tuple_length = tvb_get_ntohs(tvb, offset+2);
 410                                 edp_tuples_leaf_ti = proto_tree_add_text(edp_tuples_tree, tvb, offset, tuple_length,
 411                                         "Tuple%d", tuples_count+1);
 412
 413                                 edp_tuples_leaf_tree = proto_item_add_subtree(edp_tuples_leaf_ti, ett_ismp_edp_tuples_leaf);
 414
 415                                 tuple_type = tvb_get_ntohs(tvb, offset);
 416                                 proto_tree_add_text(edp_tuples_leaf_tree, tvb, offset, 2,
 417                                         "Tuple Type: %s(%d)", val_to_str_const( tuple_type, edp_tuple_types, "Unknown"), tuple_type );
 418                                 offset += 2;
 419                                 proto_tree_add_text(edp_tuples_leaf_tree, tvb, offset, 2,
 420                                         "Tuple Length: %d", tuple_length);
 421                                 offset += 2;
 422
 423                                 if (tvb_reported_length_remaining(tvb, offset) >= tuple_length)
 424                                 {
 425                                         tvb_ensure_bytes_exist(tvb, offset, tuple_length);
 426                                         switch (tuple_type)
 427                                         {
 428                                                 case EDP_TUPLE_HOLD:
 429                                                         proto_tree_add_text(edp_tuples_leaf_tree, tvb, offset, tuple_length,
 430                                                                 "Hold Time = %d", tvb_get_ntohs(tvb, offset));
 431                                                         break;
 432                                                 case EDP_TUPLE_INT_NAME:
 433                                                         proto_tree_add_text(edp_tuples_leaf_tree, tvb, offset, tuple_length,
 434                                                                 "Interface Name = %s", tvb_format_text(tvb, offset, tuple_length));
 435                                                         col_append_fstr(pinfo->cinfo, COL_INFO, ", ifName %s",
 436                                                                 tvb_format_text(tvb, offset, tuple_length));
 437                                                         break;
 438                                                 case EDP_TUPLE_SYS_DESCRIPT:
 439                                                         proto_tree_add_text(edp_tuples_leaf_tree, tvb, offset, tuple_length,
 440                                                                 "System Description = %s", tvb_format_text(tvb, offset, tuple_length));
 441                                                         break;
 442                                                 case EDP_TUPLE_IPX_ADDR:
 443                                                         proto_tree_add_text(edp_tuples_leaf_tree, tvb, offset, tuple_length,
 444                                                                 "Interface IPX_address = %s",
 445                                                                 ipx_addr_to_str(tvb_get_ntohl(tvb, offset),
 446                                                                 tvb_get_string(wmem_packet_scope(), tvb, offset+4, tuple_length-4)));
 447                                                         break;
 448                                                 case EDP_TUPLE_UNKNOWN:
 449                                                 default:
 450                                                         proto_tree_add_text(edp_tuples_leaf_tree, tvb, offset, tuple_length,
 451                                                                 "Unknown Tuple Data %s", tvb_format_text(tvb, offset, tuple_length));
 452                                                         break;
 453                                         }
 454                                 }
 455                                 offset += tuple_length;
 456
 457                                 tuples_count++;
 458                         }
 459                         if (tuples_count != num_tuples)
 460                         {
 461                                 proto_tree_add_text(edp_tree, tvb, offset,
 462                                         tvb_reported_length_remaining(tvb, offset), "MALFORMED PACKET");
 463                                 return;
 464                         }
 465                         else
 466                         {
 467                                 return;
 468                         }
 469                 }
 470
 471         }
 472
 473
 474 }
 475
 476
 477 /* Code to actually dissect the packets */
 478 static void
 479 dissect_ismp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 480 {
 481         int offset = 0;
 482         guint16 message_type = 0;
 483         guint8 code_length = 0;
 484         guint8 weird_stuff[3] = { 0x42, 0x42, 0x03 };
 485
 486 /* Set up structures needed to add the protocol subtree and manage it */
 487         proto_item *ti;
 488         proto_tree *ismp_tree;
 489
 490 /* Make entries in Protocol column and Info column on summary display */
 491         col_set_str(pinfo->cinfo, COL_PROTOCOL, "ISMP");
 492         col_clear(pinfo->cinfo, COL_INFO);
 493
 494         /*
 495          * XXX - I've seen captures with packets that have the ISMP
 496          * Ethernet frame type, but with the payload being 0x42 0x42 0x03
 497          * followed by what appears to be an ISMP frame.
 498          *
 499          * 0x4242 is not a valid ISMP version number.
 500          */
 501         if (tvb_memeql(tvb, offset, weird_stuff, sizeof weird_stuff) == 0)
 502                 offset += 3;    /* skip the weird stuff, for now */
 503         if (tree) {
 504                 /* create display subtree for ismp */
 505                 ti = proto_tree_add_item(tree, proto_ismp, tvb, offset, -1, ENC_NA);
 506
 507                 ismp_tree = proto_item_add_subtree(ti, ett_ismp);
 508
 509                 /* add an items to the subtree */
 510                 proto_tree_add_item(ismp_tree, hf_ismp_version, tvb, offset, 2, ENC_BIG_ENDIAN);
 511                 offset += 2;
 512                 message_type = tvb_get_ntohs(tvb, offset);
 513                 proto_tree_add_item(ismp_tree, hf_ismp_message_type, tvb, offset, 2, ENC_BIG_ENDIAN);
 514                 offset += 2;
 515                 proto_tree_add_item(ismp_tree, hf_ismp_seq_num, tvb, offset, 2, ENC_BIG_ENDIAN);
 516                 offset += 2;
 517                 code_length = tvb_get_guint8(tvb, offset);
 518                 proto_tree_add_item(ismp_tree, hf_ismp_code_length, tvb, offset, 1, ENC_BIG_ENDIAN);
 519                 offset += 1;
 520                 proto_tree_add_item(ismp_tree, hf_ismp_auth_data, tvb, offset, code_length, ENC_NA);
 521                 offset += code_length;
 522
 523                 /* if Enterasys Discover Protocol, dissect it */
 524                 if(message_type == ISMPTYPE_EDP)
 525                         dissect_ismp_edp(tvb, pinfo, offset, tree);
 526         }
 527
 528 }
 529
 530
 531 /* Register this protocol with Wireshark */
 532 void
 533 proto_register_ismp(void)
 534 {
 535
 536 /* Setup list of header fields  See Section 1.6.1 for details*/
 537         static hf_register_info hf[] = {
 538 #if 0
 539                 { &hf_ismp,
 540                         { "ISMP", "ismp",
 541                         FT_PROTOCOL, BASE_NONE, NULL, 0x0,
 542                         "Inter Switch Message Protocol", HFILL }
 543                 },
 544 #endif
 545                 { &hf_ismp_version,
 546                         { "Version",           "ismp.version",
 547                         FT_UINT16, BASE_DEC, NULL, 0x0,
 548                         NULL, HFILL }
 549                 },
 550                 { &hf_ismp_message_type,
 551                         { "Message Type", "ismp.msgtype",
 552                         FT_UINT16, BASE_DEC, NULL, 0x0,
 553                         NULL, HFILL }
 554                 },
 555                 { &hf_ismp_seq_num,
 556                         { "Sequence Number", "ismp.seqnum",
 557                         FT_UINT16, BASE_DEC, NULL, 0x0,
 558                         NULL, HFILL }
 559                 },
 560                 { &hf_ismp_code_length,
 561                         { "Auth Code Length", "ismp.codelen",
 562                         FT_UINT8, BASE_DEC, NULL, 0x0,
 563                         NULL, HFILL }
 564                 },
 565                 { &hf_ismp_auth_data,
 566                         { "Auth Data", "ismp.authdata",
 567                         FT_BYTES, BASE_NONE, NULL, 0x0,
 568                         NULL, HFILL }
 569                 },
 570                 { &hf_ismp_edp,
 571                         { "EDP", "ismp.edp",
 572                         FT_PROTOCOL, BASE_NONE, NULL, 0x0,
 573                         "Enterasys Discovery Protocol", HFILL }
 574                 },
 575                 { &hf_ismp_edp_version,
 576                         { "Version", "ismp.edp.version",
 577                         FT_UINT16, BASE_DEC, NULL, 0x0,
 578                         NULL, HFILL }
 579                 },
 580                 { &hf_ismp_edp_module_ip,
 581                         { "Module IP Address", "ismp.edp.modip",
 582                         FT_IPv4, BASE_NONE, NULL, 0x0,
 583                         NULL, HFILL }
 584                 },
 585                 { &hf_ismp_edp_module_mac,
 586                         { "Module MAC Address", "ismp.edp.modmac",
 587                         FT_ETHER, BASE_NONE, NULL, 0x0,
 588                         NULL, HFILL }
 589                 },
 590                 { &hf_ismp_edp_module_port,
 591                         { "Module Port (ifIndex num)", "ismp.edp.modport",
 592                         FT_UINT32, BASE_DEC, NULL, 0x0,
 593                         NULL, HFILL }
 594                 },
 595                 { &hf_ismp_edp_chassis_mac,
 596                         { "Chassis MAC Address", "ismp.edp.chassismac",
 597                         FT_ETHER, BASE_NONE, NULL, 0x0,
 598                         NULL, HFILL }
 599                 },
 600                 { &hf_ismp_edp_chassis_ip,
 601                         { "Chassis IP Address", "ismp.edp.chassisip",
 602                         FT_IPv4, BASE_NONE, NULL, 0x0,
 603                         NULL, HFILL }
 604                 },
 605                 { &hf_ismp_edp_device_type,
 606                         { "Device Type", "ismp.edp.devtype",
 607                         FT_UINT16, BASE_DEC, edp_device_types, 0x0,
 608                         NULL, HFILL }
 609                 },
 610                 { &hf_ismp_edp_module_rev,
 611                         { "Module Firmware Revision", "ismp.edp.rev",
 612                         FT_UINT32, BASE_DEC, NULL, 0x0,
 613                         NULL, HFILL }
 614                 },
 615                 { &hf_ismp_edp_options,
 616                         { "Device Options", "ismp.edp.options",
 617                         FT_UINT32, BASE_DEC, NULL, 0x0,
 618                         NULL, HFILL }
 619                 },
 620                 { &hf_ismp_edp_sfs_option_unused1,
 621                         { "Unused", "ismp.edp.sfs_option_unused1",
 622                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_UNUSED1,
 623                         NULL, HFILL }
 624                 },
 625                 { &hf_ismp_edp_sfs_option_sfssup,
 626                         { "SFS Support", "ismp.edp.sfs_option_sfssup",
 627                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_SFSSUP,
 628                         NULL, HFILL }
 629                 },
 630                 { &hf_ismp_edp_sfs_option_lsp,
 631                         { "LSP Support", "ismp.edp.sfs_option_lsp",
 632                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_LSP,
 633                         NULL, HFILL }
 634                 },
 635                 { &hf_ismp_edp_sfs_option_flood,
 636                         { "Flood Path Support", "ismp.edp.sfs_option_flood",
 637                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_FLOOD,
 638                         NULL, HFILL }
 639                 },
 640                 { &hf_ismp_edp_sfs_option_resolve,
 641                         { "Resolve Support", "ismp.edp.sfs_option_resolve",
 642                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_RESOLVE,
 643                         NULL, HFILL }
 644                 },
 645                 { &hf_ismp_edp_sfs_option_unused2,
 646                         { "Unused", "ismp.edp.sfs_option_unused2",
 647                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_UNUSED2,
 648                         NULL, HFILL }
 649                 },
 650                 { &hf_ismp_edp_sfs_option_tagflood,
 651                         { "Tagged Flood Support", "ismp.edp.sfs_option_tagflood",
 652                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_TAGFLOOD,
 653                         NULL, HFILL }
 654                 },
 655                 { &hf_ismp_edp_sfs_option_calltap,
 656                         { "Call Tap Support", "ismp.edp.sfs_option_calltap",
 657                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_CALLTAP,
 658                         NULL, HFILL }
 659                 },
 660                 { &hf_ismp_edp_sfs_option_conmsg,
 661                         { "Connection Message Support", "ismp.edp.sfs_option_conmsg",
 662                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_CONMSG,
 663                         NULL, HFILL }
 664                 },
 665                 { &hf_ismp_edp_sfs_option_redun,
 666                         { "Redundant Access Support", "ismp.edp.sfs_option_redun",
 667                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_REDUN,
 668                         NULL, HFILL }
 669                 },
 670                 { &hf_ismp_edp_sfs_option_isolated,
 671                         { "Isolated Switch", "ismp.edp.sfs_option_isolated",
 672                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_ISOLATED,
 673                         NULL, HFILL }
 674                 },
 675                 { &hf_ismp_edp_sfs_option_uplink_switch,
 676                         { "Uplink Switch", "ismp.edp.sfs_option_uplink_switch",
 677                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_UPLINK_SWITCH,
 678                         NULL, HFILL }
 679                 },
 680                 { &hf_ismp_edp_sfs_option_uplink_core,
 681                         { "Uplink Core", "ismp.edp.sfs_option_uplink_core",
 682                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_UPLINK_CORE,
 683                         NULL, HFILL }
 684                 },
 685                 { &hf_ismp_edp_sfs_option_uplink_port,
 686                         { "Uplink Port", "ismp.edp.sfs_option_uplink_port",
 687                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_UPLINK_PORT,
 688                         NULL, HFILL }
 689                 },
 690                 { &hf_ismp_edp_sfs_option_uplink_flood,
 691                         { "Uplink Flood Support", "ismp.edp.sfs_option_uplink_flood",
 692                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_UPLINK_FLOOD,
 693                         NULL, HFILL }
 694                 },
 695                 { &hf_ismp_edp_rtr_option_ssr,
 696                         { "SSR Type Device", "ismp.edp.rtr_option_ssr",
 697                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_SSR,
 698                         NULL, HFILL }
 699                 },
 700                 { &hf_ismp_edp_rtr_option_igmp,
 701                         { "IGMP Active", "ismp.edp.rtr_option_igmp",
 702                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_IGMP,
 703                         NULL, HFILL }
 704                 },
 705                 { &hf_ismp_edp_rtr_option_rip,
 706                         { "RIP Active", "ismp.edp.rtr_option_rip",
 707                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_RIP,
 708                         NULL, HFILL }
 709                 },
 710                 { &hf_ismp_edp_rtr_option_bgp,
 711                         { "BGP Active", "ismp.edp.rtr_option_bgp",
 712                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_BGP,
 713                         NULL, HFILL }
 714                 },
 715                 { &hf_ismp_edp_rtr_option_ospf,
 716                         { "OSPF Active", "ismp.edp.rtr_option_ospf",
 717                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_OSPF,
 718                         NULL, HFILL }
 719                 },
 720                 { &hf_ismp_edp_rtr_option_dvmrp,
 721                         { "DVMRP Active", "ismp.edp.rtr_option_dvmrp",
 722                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_DVMRP,
 723                         NULL, HFILL }
 724                 },
 725                 { &hf_ismp_edp_rtr_option_8021q,
 726                         { "802.1Q Support", "ismp.edp.rtr_option_8021q",
 727                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_8021Q,
 728                         NULL, HFILL }
 729                 },
 730                 { &hf_ismp_edp_rtr_option_gvrp,
 731                         { "GVRP Support", "ismp.edp.rtr_option_gvrp",
 732                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_GVRP,
 733                         NULL, HFILL }
 734                 },
 735                 { &hf_ismp_edp_rtr_option_gmrp,
 736                         { "GMRP Support", "ismp.edp.rtr_option_gmrp",
 737                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_GMRP,
 738                         NULL, HFILL }
 739                 },
 740                 { &hf_ismp_edp_rtr_option_igmp_snoop,
 741                         { "IGMP Snooping Support", "ismp.edp.rtr_option_igmp_snoop",
 742                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_IGMP_SNOOP,
 743                         NULL, HFILL }
 744                 },
 745                 { &hf_ismp_edp_rtr_option_route,
 746                         { "Route Bridging", "ismp.edp.rtr_option_route",
 747                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_ROUTE,
 748                         NULL, HFILL }
 749                 },
 750                 { &hf_ismp_edp_rtr_option_trans,
 751                         { "Transparent Bridging", "ismp.edp.rtr_option_trans",
 752                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_TRANS,
 753                         NULL, HFILL }
 754                 },
 755                 { &hf_ismp_edp_rtr_option_level1,
 756                         { "Level 1 Functionality", "ismp.edp.rtr_option_level1",
 757                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_LEVEL1,
 758                         NULL, HFILL }
 759                 },
 760                 { &hf_ismp_edp_switch_option_8021q,
 761                         { "802.1Q Support", "ismp.edp.switch_option_8021q",
 762                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SWITCH_OPTION_8021Q,
 763                         NULL, HFILL }
 764                 },
 765                 { &hf_ismp_edp_switch_option_gvrp,
 766                         { "GVRP Support", "ismp.edp.switch_option_gvrp",
 767                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SWITCH_OPTION_GVRP,
 768                         NULL, HFILL }
 769                 },
 770                 { &hf_ismp_edp_switch_option_gmrp,
 771                         { "GMRP Support", "ismp.edp.switch_option_gmrp",
 772                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SWITCH_OPTION_GMRP,
 773                         NULL, HFILL }
 774                 },
 775                 { &hf_ismp_edp_switch_option_igmp,
 776                         { "IGMP Snooping Support", "ismp.edp.switch_option_igmp",
 777                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SWITCH_OPTION_IGMP,
 778                         NULL, HFILL }
 779                 },
 780                 { &hf_ismp_edp_switch_option_route,
 781                         { "Route Bridging", "ismp.edp.switch_option_route",
 782                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SWITCH_OPTION_ROUTE,
 783                         NULL, HFILL }
 784                 },
 785                 { &hf_ismp_edp_switch_option_trans,
 786                         { "Transparent Bridging", "ismp.edp.switch_option_trans",
 787                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SWITCH_OPTION_TRANS,
 788                         NULL, HFILL }
 789                 },
 790                 { &hf_ismp_edp_switch_option_level1,
 791                         { "Level 1 Functionality", "ismp.edp.switch_option_level1",
 792                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SWITCH_OPTION_LEVEL1,
 793                         NULL, HFILL }
 794                 },
 795                 { &hf_ismp_edp_end_station_option_dhcp,
 796                         { "DHCP Enabled", "ismp.edp.end_station_option_dhcp",
 797                         FT_BOOLEAN, 32, TFS(&is_set), EDP_END_STATION_OPTION_DHCP,
 798                         NULL, HFILL }
 799                 },
 800                 { &hf_ismp_edp_end_station_option_dns,
 801                         { "DNS Enabled", "ismp.edp.end_station_option_dns",
 802                         FT_BOOLEAN, 32, TFS(&is_set), EDP_END_STATION_OPTION_DNS,
 803                         NULL, HFILL }
 804                 },
 805                 { &hf_ismp_edp_end_station_option_ad,
 806                         { "Active Directory Enabled", "ismp.edp.end_station_option_ad",
 807                         FT_BOOLEAN, 32, TFS(&is_set), EDP_END_STATION_OPTION_AD,
 808                         NULL, HFILL }
 809                 },
 810                 { &hf_ismp_edp_num_neighbors,
 811                         { "Number of Known Neighbors", "ismp.edp.maccount",
 812                         FT_UINT16, BASE_DEC, NULL, 0x0,
 813                         NULL, HFILL }
 814                 },
 815                 { &hf_ismp_edp_neighbors,
 816                         { "Neighbors", "ismp.edp.nbrs",
 817                         FT_BYTES, BASE_NONE, NULL, 0x0,
 818                         NULL, HFILL }
 819                 },
 820                 { &hf_ismp_edp_num_tuples,
 821                         { "Number of Tuples", "ismp.edp.numtups",
 822                         FT_UINT16, BASE_DEC, NULL, 0x0,
 823                         NULL, HFILL }
 824                 },
 825                 { &hf_ismp_edp_tuples,
 826                         { "Number of Tuples", "ismp.edp.tups",
 827                         FT_BYTES, BASE_NONE, NULL, 0x0,
 828                         NULL, HFILL }
 829                 },
 830         };
 831
 832 /* Setup protocol subtree array */
 833         static gint *ett[] = {
 834                 &ett_ismp,
 835                 &ett_ismp_edp,
 836                 &ett_ismp_edp_options,
 837                 &ett_ismp_edp_neighbors,
 838                 &ett_ismp_edp_neighbors_leaf,
 839                 &ett_ismp_edp_tuples,
 840                 &ett_ismp_edp_tuples_leaf,
 841         };
 842
 843 /* Register the protocol name and description */
 844         proto_ismp = proto_register_protocol("InterSwitch Message Protocol",
 845             "ISMP", "ismp");
 846
 847 /* Required function calls to register the header fields and subtrees used */
 848         proto_register_field_array(proto_ismp, hf, array_length(hf));
 849         proto_register_subtree_array(ett, array_length(ett));
 850 }
 851
 852
 853 /* If this dissector uses sub-dissector registration add a registration routine.
 854    This format is required because a script is used to find these routines and
 855    create the code that calls these routines.
 856 */
 857 void
 858 proto_reg_handoff_ismp(void)
 859 {
 860         dissector_handle_t ismp_handle;
 861
 862         ismp_handle = create_dissector_handle(dissect_ismp,
 863             proto_ismp);
 864         dissector_add_uint("ethertype", ETHERTYPE_ISMP, ismp_handle);
 865 }