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/to_str.h>
  33 #include <epan/strutil.h>
  34 #include <epan/etypes.h>
  35
  36 void proto_register_ismp(void);
  37 void proto_reg_handoff_ismp(void);
  38
  39 /* Initialize the protocol and registered fields */
  40 static int proto_ismp = -1;
  41 static int hf_ismp_version = -1;
  42 static int hf_ismp_message_type = -1;
  43 static int hf_ismp_seq_num = -1;
  44 static int hf_ismp_code_length = -1;
  45 static int hf_ismp_auth_data = -1;
  46
  47 /* Enterasys/Cabletron Dicovery Protocol fields*/
  48 static int hf_ismp_edp = -1;
  49 static int hf_ismp_edp_version = -1;
  50 static int hf_ismp_edp_module_ip = -1;
  51 static int hf_ismp_edp_module_mac = -1;
  52 static int hf_ismp_edp_module_port = -1;
  53 static int hf_ismp_edp_chassis_mac =-1;
  54 static int hf_ismp_edp_chassis_ip = -1;
  55 static int hf_ismp_edp_device_type = -1;
  56 static int hf_ismp_edp_module_rev = -1;
  57 static int hf_ismp_edp_options = -1;
  58 static int hf_ismp_edp_sfs_option_unused1 = -1;
  59 static int hf_ismp_edp_sfs_option_sfssup = -1;
  60 static int hf_ismp_edp_sfs_option_lsp = -1;
  61 static int hf_ismp_edp_sfs_option_flood = -1;
  62 static int hf_ismp_edp_sfs_option_resolve = -1;
  63 static int hf_ismp_edp_sfs_option_unused2 = -1;
  64 static int hf_ismp_edp_sfs_option_tagflood = -1;
  65 static int hf_ismp_edp_sfs_option_calltap = -1;
  66 static int hf_ismp_edp_sfs_option_conmsg = -1;
  67 static int hf_ismp_edp_sfs_option_redun = -1;
  68 static int hf_ismp_edp_sfs_option_isolated = -1;
  69 static int hf_ismp_edp_sfs_option_uplink_switch = -1;
  70 static int hf_ismp_edp_sfs_option_uplink_core = -1;
  71 static int hf_ismp_edp_sfs_option_uplink_port = -1;
  72 static int hf_ismp_edp_sfs_option_uplink_flood = -1;
  73 static int hf_ismp_edp_rtr_option_ssr = -1;
  74 static int hf_ismp_edp_rtr_option_igmp = -1;
  75 static int hf_ismp_edp_rtr_option_rip = -1;
  76 static int hf_ismp_edp_rtr_option_bgp = -1;
  77 static int hf_ismp_edp_rtr_option_ospf = -1;
  78 static int hf_ismp_edp_rtr_option_dvmrp = -1;
  79 static int hf_ismp_edp_rtr_option_8021q = -1;
  80 static int hf_ismp_edp_rtr_option_gvrp = -1;
  81 static int hf_ismp_edp_rtr_option_gmrp = -1;
  82 static int hf_ismp_edp_rtr_option_igmp_snoop = -1;
  83 static int hf_ismp_edp_rtr_option_route = -1;
  84 static int hf_ismp_edp_rtr_option_trans = -1;
  85 static int hf_ismp_edp_rtr_option_level1 = -1;
  86 static int hf_ismp_edp_switch_option_8021q = -1;
  87 static int hf_ismp_edp_switch_option_gvrp = -1;
  88 static int hf_ismp_edp_switch_option_gmrp = -1;
  89 static int hf_ismp_edp_switch_option_igmp = -1;
  90 static int hf_ismp_edp_switch_option_route = -1;
  91 static int hf_ismp_edp_switch_option_trans = -1;
  92 static int hf_ismp_edp_switch_option_level1 = -1;
  93 static int hf_ismp_edp_end_station_option_dhcp = -1;
  94 static int hf_ismp_edp_end_station_option_dns = -1;
  95 static int hf_ismp_edp_end_station_option_ad = -1;
  96 static int hf_ismp_edp_num_neighbors = -1;
  97 static int hf_ismp_edp_neighbors = -1;
  98 static int hf_ismp_edp_num_tuples = -1;
  99 static int hf_ismp_edp_tuples = -1;
 100
 101
 102 /* Initialize the subtree pointers */
 103 static gint ett_ismp = -1;
 104 static gint ett_ismp_edp = -1;
 105 static gint ett_ismp_edp_options = -1;
 106 static gint ett_ismp_edp_neighbors = -1;
 107 static gint ett_ismp_edp_neighbors_leaf = -1;
 108 static gint ett_ismp_edp_tuples = -1;
 109 static gint ett_ismp_edp_tuples_leaf = -1;
 110
 111 /* ISMP TYPES */
 112 #define ISMPTYPE_EDP    2
 113
 114
 115 /* EDP DEVICE TYPES */
 116 #define EDP_DEVICE_TYPE_SFS17           1
 117 #define EDP_DEVICE_TYPE_SFS18           2
 118 #define EDP_DEVICE_TYPE_ROUTER          3
 119 #define EDP_DEVICE_TYPE_BRIDGE          4
 120 #define EDP_DEVICE_TYPE_VLANMAN         5
 121 #define EDP_DEVICE_TYPE_NTSERVER        6
 122 #define EDP_DEVICE_TYPE_NTCLIENT        7
 123 #define EDP_DEVICE_TYPE_WIN95           8
 124 #define EDP_DEVICE_TYPE_WIN98           9
 125 #define EDP_DEVICE_TYPE_UNIXSERVER      10
 126 #define EDP_DEVICE_TYPE_UNIXCLIENT      11
 127 #define EDP_DEVICE_TYPE_ACCESSPOINT     12
 128
 129
 130 static const value_string edp_device_types[] = {
 131         { EDP_DEVICE_TYPE_SFS17,       "Network Switch running SecureFast version 1.7 or lower" },
 132         { EDP_DEVICE_TYPE_SFS18,         "Network Switch running SecureFast version 1.8 or greater" },
 133         { EDP_DEVICE_TYPE_ROUTER,         "Router" },
 134         { EDP_DEVICE_TYPE_BRIDGE,         "Bridge" },
 135         { EDP_DEVICE_TYPE_VLANMAN,         "Cabletron VLAN Manager" },
 136         { EDP_DEVICE_TYPE_NTSERVER,         "Network Server (NT)" },
 137         { EDP_DEVICE_TYPE_NTCLIENT,    "Network Workstation (NT)" },
 138         { EDP_DEVICE_TYPE_WIN95,     "Windows95" },
 139         { EDP_DEVICE_TYPE_WIN98,        "Windows98" },
 140         { EDP_DEVICE_TYPE_UNIXSERVER,       "UNIX Server" },
 141         { EDP_DEVICE_TYPE_UNIXCLIENT, "UNIX Workstation" },
 142         { EDP_DEVICE_TYPE_ACCESSPOINT,     "Roamabout wireless access point" },
 143         { 0,                    NULL },
 144 };
 145
 146
 147 /* EDP SFS Options */
 148 #define EDP_SFS_OPTION_UNUSED1          0x1
 149 #define EDP_SFS_OPTION_SFSSUP           0x2
 150 #define EDP_SFS_OPTION_LSP              0x4
 151 #define EDP_SFS_OPTION_FLOOD            0x8
 152 #define EDP_SFS_OPTION_RESOLVE          0x10
 153 #define EDP_SFS_OPTION_UNUSED2          0x20
 154 #define EDP_SFS_OPTION_TAGFLOOD         0x40
 155 #define EDP_SFS_OPTION_CALLTAP          0x80
 156 #define EDP_SFS_OPTION_CONMSG           0x100
 157 #define EDP_SFS_OPTION_REDUN            0x200
 158 #define EDP_SFS_OPTION_ISOLATED         0x400
 159 #define EDP_SFS_OPTION_UPLINK_SWITCH    0x800
 160 #define EDP_SFS_OPTION_UPLINK_CORE      0x1000
 161 #define EDP_SFS_OPTION_UPLINK_PORT      0x2000
 162 #define EDP_SFS_OPTION_UPLINK_FLOOD     0x4000
 163
 164 /* EDP Router Options */
 165 #define EDP_RTR_OPTION_SSR              0x1
 166 #define EDP_RTR_OPTION_IGMP             0x2
 167 #define EDP_RTR_OPTION_RIP              0x4
 168 #define EDP_RTR_OPTION_BGP              0x8
 169 #define EDP_RTR_OPTION_OSPF             0x10
 170 #define EDP_RTR_OPTION_DVMRP            0x20
 171 #define EDP_RTR_OPTION_8021Q            0x40
 172 #define EDP_RTR_OPTION_GVRP             0x80
 173 #define EDP_RTR_OPTION_GMRP             0x100
 174 #define EDP_RTR_OPTION_IGMP_SNOOP       0x200
 175 #define EDP_RTR_OPTION_ROUTE            0x400
 176 #define EDP_RTR_OPTION_TRANS            0x800
 177 #define EDP_RTR_OPTION_LEVEL1           0x1000
 178
 179 /* EDP Switch Options */
 180 #define EDP_SWITCH_OPTION_8021Q         0x1
 181 #define EDP_SWITCH_OPTION_GVRP          0x2
 182 #define EDP_SWITCH_OPTION_GMRP          0x4
 183 #define EDP_SWITCH_OPTION_IGMP          0x8
 184 #define EDP_SWITCH_OPTION_ROUTE         0x10
 185 #define EDP_SWITCH_OPTION_TRANS         0x20
 186 #define EDP_SWITCH_OPTION_LEVEL1        0x40
 187
 188 /* EDP End Station and Server Options */
 189 #define EDP_END_STATION_OPTION_DHCP     0x1
 190 #define EDP_END_STATION_OPTION_DNS      0x2
 191 #define EDP_END_STATION_OPTION_AD       0x4
 192
 193 /* EDP Tuple Types */
 194 #define EDP_TUPLE_UNKNOWN               0
 195 #define EDP_TUPLE_HOLD                  1
 196 #define EDP_TUPLE_INT_NAME              2
 197 #define EDP_TUPLE_SYS_DESCRIPT  3
 198 #define EDP_TUPLE_IPX_ADDR              4
 199
 200 static const value_string edp_tuple_types[] =
 201 {
 202         { EDP_TUPLE_UNKNOWN,"Unknown" },
 203         { EDP_TUPLE_HOLD,"Hold Time" },
 204         { EDP_TUPLE_INT_NAME,"Interface Name" },
 205         { EDP_TUPLE_SYS_DESCRIPT,"System Description" },
 206         { EDP_TUPLE_IPX_ADDR,"IPX Address" },
 207         { 0,NULL }
 208 };
 209
 210 /* Is value set? */
 211 static const true_false_string is_set = {
 212         "set",
 213         "not set"
 214 };
 215
 216
 217 /* Function to dissect EDP portion of ISMP message */
 218 static void
 219 dissect_ismp_edp(tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *ismp_tree)
 220 {
 221         /* local variables used for EDP dissection */
 222         int neighbors_count = 0;
 223         int tuples_count = 0;
 224         guint16 device_type = 0;
 225         guint32 options = 0;
 226         guint16 num_neighbors = 0;
 227         guint16 num_tuples = 0;
 228         guint16 tuple_type = 0;
 229         guint16 tuple_length = 0;
 230
 231         /* Set up structures needed to add the protocol subtree and manage it */
 232         proto_item *edp_ti;
 233         proto_tree *edp_tree;
 234
 235         proto_item *edp_options_ti;
 236         proto_tree *edp_options_tree;
 237
 238         proto_item *edp_neighbors_ti;
 239         proto_tree *edp_neighbors_tree;
 240
 241         proto_item *edp_neighbors_leaf_ti;
 242         proto_tree *edp_neighbors_leaf_tree;
 243
 244         proto_item *edp_tuples_ti;
 245         proto_tree *edp_tuples_tree;
 246
 247         proto_item *edp_tuples_leaf_ti;
 248         proto_tree *edp_tuples_leaf_tree;
 249
 250         /* add column iformation marking this as EDP (Enterasys Discover Protocol */
 251         col_set_str(pinfo->cinfo, COL_PROTOCOL, "ISMP.EDP");
 252         col_clear(pinfo->cinfo, COL_INFO);
 253
 254         /* create display subtree for EDP */
 255         if (ismp_tree) {
 256                 edp_ti  = proto_tree_add_item(ismp_tree, hf_ismp_edp, tvb, offset,
 257                         tvb_length_remaining(tvb, offset), ENC_NA);
 258                 edp_tree = proto_item_add_subtree(edp_ti, ett_ismp_edp);
 259
 260                 col_add_fstr(pinfo->cinfo, COL_INFO, "MIP %s, MMAC %s, ifIdx %d",
 261                         tvb_ip_to_str(tvb, offset+2),
 262                         tvb_ether_to_str(tvb, offset+6),
 263                         tvb_get_ntohl(tvb, offset+12));
 264
 265                 proto_tree_add_item(edp_tree, hf_ismp_edp_version, tvb, offset, 2, ENC_BIG_ENDIAN);
 266                 offset += 2;
 267                 proto_tree_add_item(edp_tree, hf_ismp_edp_module_ip, tvb, offset, 4, ENC_BIG_ENDIAN);
 268                 offset += 4;
 269                 proto_tree_add_item(edp_tree, hf_ismp_edp_module_mac, tvb, offset, 6, ENC_NA);
 270                 offset += 6;
 271                 proto_tree_add_item(edp_tree, hf_ismp_edp_module_port, tvb, offset, 4, ENC_BIG_ENDIAN);
 272                 offset += 4;
 273                 proto_tree_add_item(edp_tree, hf_ismp_edp_chassis_mac, tvb, offset, 6, ENC_NA);
 274                 offset += 6;
 275                 proto_tree_add_item(edp_tree, hf_ismp_edp_chassis_ip, tvb, offset, 4, ENC_BIG_ENDIAN);
 276                 offset += 4;
 277                 device_type = tvb_get_ntohs(tvb, offset);
 278                 proto_tree_add_item(edp_tree, hf_ismp_edp_device_type, tvb, offset, 2, ENC_BIG_ENDIAN);
 279                 offset += 2;
 280                 proto_tree_add_uint_format_value(edp_tree, hf_ismp_edp_module_rev, tvb, offset, 4, tvb_get_ntohl(tvb, offset),
 281                         "%02x.%02x.%02x.%02x", tvb_get_guint8(tvb, offset),
 282                         tvb_get_guint8(tvb, offset+1), tvb_get_guint8(tvb, offset+2), tvb_get_guint8(tvb, offset+3));
 283                 offset += 4;
 284
 285                 /* create display subtree for EDP options */
 286                 options = tvb_get_ntohl(tvb, offset);
 287                 edp_options_ti = proto_tree_add_uint_format(edp_tree, hf_ismp_edp_options, tvb, offset, 4,
 288                         options,"Options: 0x%08x",options);
 289                 edp_options_tree = proto_item_add_subtree(edp_options_ti, ett_ismp_edp_options);
 290
 291                 /* depending on device_type, show the appropriate options */
 292                 switch (device_type) {
 293                         case EDP_DEVICE_TYPE_SFS17:
 294                         case EDP_DEVICE_TYPE_SFS18:
 295                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_uplink_flood, tvb, offset, 4, ENC_BIG_ENDIAN);
 296                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_uplink_port, tvb, offset, 4, ENC_BIG_ENDIAN);
 297                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_uplink_core, tvb, offset, 4, ENC_BIG_ENDIAN);
 298                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_uplink_switch, tvb, offset, 4, ENC_BIG_ENDIAN);
 299                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_isolated, tvb, offset, 4, ENC_BIG_ENDIAN);
 300                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_redun, tvb, offset, 4, ENC_BIG_ENDIAN);
 301                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_conmsg, tvb, offset, 4, ENC_BIG_ENDIAN);
 302                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_calltap, tvb, offset, 4, ENC_BIG_ENDIAN);
 303                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_tagflood, tvb, offset, 4, ENC_BIG_ENDIAN);
 304                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_unused2, tvb, offset, 4, ENC_BIG_ENDIAN);
 305                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_resolve, tvb, offset, 4, ENC_BIG_ENDIAN);
 306                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_flood, tvb, offset, 4, ENC_BIG_ENDIAN);
 307                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_lsp, tvb, offset, 4, ENC_BIG_ENDIAN);
 308                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_sfssup, tvb, offset, 4, ENC_BIG_ENDIAN);
 309                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_sfs_option_unused1, tvb, offset, 4, ENC_BIG_ENDIAN);
 310                                 break;
 311                         case EDP_DEVICE_TYPE_ROUTER:
 312                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_level1, tvb, offset, 4, ENC_BIG_ENDIAN);
 313                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_trans, tvb, offset, 4, ENC_BIG_ENDIAN);
 314                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_route, tvb, offset, 4, ENC_BIG_ENDIAN);
 315                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_igmp_snoop, tvb, offset, 4, ENC_BIG_ENDIAN);
 316                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_gmrp, tvb, offset, 4, ENC_BIG_ENDIAN);
 317                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_gvrp, tvb, offset, 4, ENC_BIG_ENDIAN);
 318                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_8021q, tvb, offset, 4, ENC_BIG_ENDIAN);
 319                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_dvmrp, tvb, offset, 4, ENC_BIG_ENDIAN);
 320                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_ospf, tvb, offset, 4, ENC_BIG_ENDIAN);
 321                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_bgp, tvb, offset, 4, ENC_BIG_ENDIAN);
 322                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_rip, tvb, offset, 4, ENC_BIG_ENDIAN);
 323                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_igmp, tvb, offset, 4, ENC_BIG_ENDIAN);
 324                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_rtr_option_ssr, tvb, offset, 4, ENC_BIG_ENDIAN);
 325                                 break;
 326                         case EDP_DEVICE_TYPE_BRIDGE:
 327                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_switch_option_level1, tvb, offset, 4, ENC_BIG_ENDIAN);
 328                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_switch_option_trans, tvb, offset, 4, ENC_BIG_ENDIAN);
 329                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_switch_option_route, tvb, offset, 4, ENC_BIG_ENDIAN);
 330                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_switch_option_igmp, tvb, offset, 4, ENC_BIG_ENDIAN);
 331                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_switch_option_gmrp, tvb, offset, 4, ENC_BIG_ENDIAN);
 332                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_switch_option_gvrp, tvb, offset, 4, ENC_BIG_ENDIAN);
 333                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_switch_option_8021q, tvb, offset, 4, ENC_BIG_ENDIAN);
 334                                 break;
 335                         case EDP_DEVICE_TYPE_VLANMAN:
 336                                 break;
 337                         case EDP_DEVICE_TYPE_NTSERVER:
 338                         case EDP_DEVICE_TYPE_NTCLIENT:
 339                         case EDP_DEVICE_TYPE_WIN95:
 340                         case EDP_DEVICE_TYPE_WIN98:
 341                         case EDP_DEVICE_TYPE_UNIXSERVER:
 342                         case EDP_DEVICE_TYPE_UNIXCLIENT:
 343                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_end_station_option_ad, tvb, offset, 4, ENC_BIG_ENDIAN);
 344                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_end_station_option_dns, tvb, offset, 4, ENC_BIG_ENDIAN);
 345                                 proto_tree_add_item(edp_options_tree, hf_ismp_edp_end_station_option_dhcp, tvb, offset, 4, ENC_BIG_ENDIAN);
 346                                 break;
 347                         case EDP_DEVICE_TYPE_ACCESSPOINT:
 348                         default:
 349                                 break;
 350                 }
 351                 offset += 4;
 352
 353                 /* determine the number of neighbors and create EDP neighbors subtree */
 354                 num_neighbors = tvb_get_ntohs(tvb, offset);
 355                 proto_tree_add_item(edp_tree, hf_ismp_edp_num_neighbors, tvb, offset, 2, ENC_BIG_ENDIAN);
 356                 offset += 2;
 357                 if (num_neighbors > 0)
 358                 {
 359                         edp_neighbors_ti = proto_tree_add_item(edp_tree, hf_ismp_edp_neighbors, tvb,
 360                                                                                 offset, num_neighbors*10, ENC_NA);
 361                         edp_neighbors_tree = proto_item_add_subtree(edp_neighbors_ti, ett_ismp_edp_neighbors);
 362                         while ( neighbors_count < num_neighbors && tvb_reported_length_remaining(tvb, offset) >= 10)
 363                         {
 364                                 edp_neighbors_leaf_ti = proto_tree_add_text(edp_neighbors_tree, tvb, offset, 10,
 365                                                                                 "Neighbor%d", (neighbors_count+1));
 366                                 edp_neighbors_leaf_tree = proto_item_add_subtree(edp_neighbors_leaf_ti, ett_ismp_edp_neighbors_leaf);
 367
 368                                 proto_tree_add_text(edp_neighbors_leaf_tree, tvb, offset, 6,
 369                                         "MAC Address: %s", tvb_ether_to_str(tvb, offset));
 370                                 proto_tree_add_text(edp_neighbors_leaf_tree, tvb, offset, 4,
 371                                         "Assigned Neighbor State 0x%04x", tvb_get_ntohl(tvb, offset));
 372                                 offset += 10;
 373                                 neighbors_count++;
 374                         }
 375                         if (neighbors_count != num_neighbors)
 376                         {
 377                                 proto_tree_add_text(edp_tree, tvb, offset, tvb_reported_length_remaining(tvb, offset),
 378                                 "MALFORMED PACKET");
 379                                 return;
 380                         }
 381                 }
 382
 383                 /* determine data remains, if so, count tuples
 384                    and create EDP tuples subtree */
 385                 if (tvb_reported_length_remaining(tvb, offset) != 0 &&
 386                         tvb_reported_length_remaining(tvb, offset) >= 2)
 387                 {
 388                         num_tuples = tvb_get_ntohs(tvb, offset);
 389                         proto_tree_add_item(edp_tree, hf_ismp_edp_num_tuples, tvb, offset, 2, ENC_BIG_ENDIAN);
 390                         offset += 2;
 391                 }
 392                 else if (tvb_reported_length_remaining(tvb, offset) > 0) {
 393                         proto_tree_add_text(edp_tree, tvb, offset,
 394                                 tvb_reported_length_remaining(tvb, offset), "MALFORMED PACKET");
 395                         return;
 396                 }
 397                 else
 398                 {
 399                         return;
 400                 }
 401
 402                 /* start populating tuple information */
 403                 if (num_tuples && tvb_reported_length_remaining(tvb, offset) >= 4)
 404                 {
 405                         edp_tuples_ti = proto_tree_add_bytes_format(edp_tree, hf_ismp_edp_tuples, tvb,
 406                                 offset, tvb_reported_length_remaining(tvb, offset), NULL, "Tuples");
 407                         edp_tuples_tree = proto_item_add_subtree(edp_tuples_ti, ett_ismp_edp_tuples);
 408
 409                         while ( (tuples_count < num_tuples) && (tvb_reported_length_remaining(tvb, offset) >= 4) )
 410                         {
 411
 412                                 tuple_length = tvb_get_ntohs(tvb, offset+2);
 413                                 edp_tuples_leaf_ti = proto_tree_add_text(edp_tuples_tree, tvb, offset, tuple_length,
 414                                         "Tuple%d", tuples_count+1);
 415
 416                                 edp_tuples_leaf_tree = proto_item_add_subtree(edp_tuples_leaf_ti, ett_ismp_edp_tuples_leaf);
 417
 418                                 tuple_type = tvb_get_ntohs(tvb, offset);
 419                                 proto_tree_add_text(edp_tuples_leaf_tree, tvb, offset, 2,
 420                                         "Tuple Type: %s(%d)", val_to_str_const( tuple_type, edp_tuple_types, "Unknown"), tuple_type );
 421                                 offset += 2;
 422                                 proto_tree_add_text(edp_tuples_leaf_tree, tvb, offset, 2,
 423                                         "Tuple Length: %d", tuple_length);
 424                                 offset += 2;
 425
 426                                 if (tvb_reported_length_remaining(tvb, offset) >= tuple_length)
 427                                 {
 428                                         tvb_ensure_bytes_exist(tvb, offset, tuple_length);
 429                                         switch (tuple_type)
 430                                         {
 431                                                 case EDP_TUPLE_HOLD:
 432                                                         proto_tree_add_text(edp_tuples_leaf_tree, tvb, offset, tuple_length,
 433                                                                 "Hold Time = %d", tvb_get_ntohs(tvb, offset));
 434                                                         break;
 435                                                 case EDP_TUPLE_INT_NAME:
 436                                                         proto_tree_add_text(edp_tuples_leaf_tree, tvb, offset, tuple_length,
 437                                                                 "Interface Name = %s", tvb_format_text(tvb, offset, tuple_length));
 438                                                         col_append_fstr(pinfo->cinfo, COL_INFO, ", ifName %s",
 439                                                                 tvb_format_text(tvb, offset, tuple_length));
 440                                                         break;
 441                                                 case EDP_TUPLE_SYS_DESCRIPT:
 442                                                         proto_tree_add_text(edp_tuples_leaf_tree, tvb, offset, tuple_length,
 443                                                                 "System Description = %s", tvb_format_text(tvb, offset, tuple_length));
 444                                                         break;
 445                                                 case EDP_TUPLE_IPX_ADDR:
 446                                                         proto_tree_add_text(edp_tuples_leaf_tree, tvb, offset, tuple_length,
 447                                                                 "Interface IPX_address = %s",
 448                                                                 ipx_addr_to_str(tvb_get_ntohl(tvb, offset),
 449                                                                 tvb_get_string(wmem_packet_scope(), tvb, offset+4, tuple_length-4)));
 450                                                         break;
 451                                                 case EDP_TUPLE_UNKNOWN:
 452                                                 default:
 453                                                         proto_tree_add_text(edp_tuples_leaf_tree, tvb, offset, tuple_length,
 454                                                                 "Unknown Tuple Data %s", tvb_format_text(tvb, offset, tuple_length));
 455                                                         break;
 456                                         }
 457                                 }
 458                                 offset += tuple_length;
 459
 460                                 tuples_count++;
 461                         }
 462                         if (tuples_count != num_tuples)
 463                         {
 464                                 proto_tree_add_text(edp_tree, tvb, offset,
 465                                         tvb_reported_length_remaining(tvb, offset), "MALFORMED PACKET");
 466                                 return;
 467                         }
 468                         else
 469                         {
 470                                 return;
 471                         }
 472                 }
 473
 474         }
 475
 476
 477 }
 478
 479
 480 /* Code to actually dissect the packets */
 481 static void
 482 dissect_ismp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 483 {
 484         int offset = 0;
 485         guint16 message_type = 0;
 486         guint8 code_length = 0;
 487         guint8 weird_stuff[3] = { 0x42, 0x42, 0x03 };
 488
 489 /* Set up structures needed to add the protocol subtree and manage it */
 490         proto_item *ti;
 491         proto_tree *ismp_tree;
 492
 493 /* Make entries in Protocol column and Info column on summary display */
 494         col_set_str(pinfo->cinfo, COL_PROTOCOL, "ISMP");
 495         col_clear(pinfo->cinfo, COL_INFO);
 496
 497         /*
 498          * XXX - I've seen captures with packets that have the ISMP
 499          * Ethernet frame type, but with the payload being 0x42 0x42 0x03
 500          * followed by what appears to be an ISMP frame.
 501          *
 502          * 0x4242 is not a valid ISMP version number.
 503          */
 504         if (tvb_memeql(tvb, offset, weird_stuff, sizeof weird_stuff) == 0)
 505                 offset += 3;    /* skip the weird stuff, for now */
 506         if (tree) {
 507                 /* create display subtree for ismp */
 508                 ti = proto_tree_add_item(tree, proto_ismp, tvb, offset, -1, ENC_NA);
 509
 510                 ismp_tree = proto_item_add_subtree(ti, ett_ismp);
 511
 512                 /* add an items to the subtree */
 513                 proto_tree_add_item(ismp_tree, hf_ismp_version, tvb, offset, 2, ENC_BIG_ENDIAN);
 514                 offset += 2;
 515                 message_type = tvb_get_ntohs(tvb, offset);
 516                 proto_tree_add_item(ismp_tree, hf_ismp_message_type, tvb, offset, 2, ENC_BIG_ENDIAN);
 517                 offset += 2;
 518                 proto_tree_add_item(ismp_tree, hf_ismp_seq_num, tvb, offset, 2, ENC_BIG_ENDIAN);
 519                 offset += 2;
 520                 code_length = tvb_get_guint8(tvb, offset);
 521                 proto_tree_add_item(ismp_tree, hf_ismp_code_length, tvb, offset, 1, ENC_BIG_ENDIAN);
 522                 offset += 1;
 523                 proto_tree_add_item(ismp_tree, hf_ismp_auth_data, tvb, offset, code_length, ENC_NA);
 524                 offset += code_length;
 525
 526                 /* if Enterasys Discover Protocol, dissect it */
 527                 if(message_type == ISMPTYPE_EDP)
 528                         dissect_ismp_edp(tvb, pinfo, offset, tree);
 529         }
 530
 531 }
 532
 533
 534 /* Register this protocol with Wireshark */
 535 void
 536 proto_register_ismp(void)
 537 {
 538
 539 /* Setup list of header fields  See Section 1.6.1 for details*/
 540         static hf_register_info hf[] = {
 541 #if 0
 542                 { &hf_ismp,
 543                         { "ISMP", "ismp",
 544                         FT_PROTOCOL, BASE_NONE, NULL, 0x0,
 545                         "Inter Switch Message Protocol", HFILL }
 546                 },
 547 #endif
 548                 { &hf_ismp_version,
 549                         { "Version",           "ismp.version",
 550                         FT_UINT16, BASE_DEC, NULL, 0x0,
 551                         NULL, HFILL }
 552                 },
 553                 { &hf_ismp_message_type,
 554                         { "Message Type", "ismp.msgtype",
 555                         FT_UINT16, BASE_DEC, NULL, 0x0,
 556                         NULL, HFILL }
 557                 },
 558                 { &hf_ismp_seq_num,
 559                         { "Sequence Number", "ismp.seqnum",
 560                         FT_UINT16, BASE_DEC, NULL, 0x0,
 561                         NULL, HFILL }
 562                 },
 563                 { &hf_ismp_code_length,
 564                         { "Auth Code Length", "ismp.codelen",
 565                         FT_UINT8, BASE_DEC, NULL, 0x0,
 566                         NULL, HFILL }
 567                 },
 568                 { &hf_ismp_auth_data,
 569                         { "Auth Data", "ismp.authdata",
 570                         FT_BYTES, BASE_NONE, NULL, 0x0,
 571                         NULL, HFILL }
 572                 },
 573                 { &hf_ismp_edp,
 574                         { "EDP", "ismp.edp",
 575                         FT_PROTOCOL, BASE_NONE, NULL, 0x0,
 576                         "Enterasys Discovery Protocol", HFILL }
 577                 },
 578                 { &hf_ismp_edp_version,
 579                         { "Version", "ismp.edp.version",
 580                         FT_UINT16, BASE_DEC, NULL, 0x0,
 581                         NULL, HFILL }
 582                 },
 583                 { &hf_ismp_edp_module_ip,
 584                         { "Module IP Address", "ismp.edp.modip",
 585                         FT_IPv4, BASE_NONE, NULL, 0x0,
 586                         NULL, HFILL }
 587                 },
 588                 { &hf_ismp_edp_module_mac,
 589                         { "Module MAC Address", "ismp.edp.modmac",
 590                         FT_ETHER, BASE_NONE, NULL, 0x0,
 591                         NULL, HFILL }
 592                 },
 593                 { &hf_ismp_edp_module_port,
 594                         { "Module Port (ifIndex num)", "ismp.edp.modport",
 595                         FT_UINT32, BASE_DEC, NULL, 0x0,
 596                         NULL, HFILL }
 597                 },
 598                 { &hf_ismp_edp_chassis_mac,
 599                         { "Chassis MAC Address", "ismp.edp.chassismac",
 600                         FT_ETHER, BASE_NONE, NULL, 0x0,
 601                         NULL, HFILL }
 602                 },
 603                 { &hf_ismp_edp_chassis_ip,
 604                         { "Chassis IP Address", "ismp.edp.chassisip",
 605                         FT_IPv4, BASE_NONE, NULL, 0x0,
 606                         NULL, HFILL }
 607                 },
 608                 { &hf_ismp_edp_device_type,
 609                         { "Device Type", "ismp.edp.devtype",
 610                         FT_UINT16, BASE_DEC, edp_device_types, 0x0,
 611                         NULL, HFILL }
 612                 },
 613                 { &hf_ismp_edp_module_rev,
 614                         { "Module Firmware Revision", "ismp.edp.rev",
 615                         FT_UINT32, BASE_DEC, NULL, 0x0,
 616                         NULL, HFILL }
 617                 },
 618                 { &hf_ismp_edp_options,
 619                         { "Device Options", "ismp.edp.options",
 620                         FT_UINT32, BASE_DEC, NULL, 0x0,
 621                         NULL, HFILL }
 622                 },
 623                 { &hf_ismp_edp_sfs_option_unused1,
 624                         { "Unused", "ismp.edp.sfs_option_unused1",
 625                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_UNUSED1,
 626                         NULL, HFILL }
 627                 },
 628                 { &hf_ismp_edp_sfs_option_sfssup,
 629                         { "SFS Support", "ismp.edp.sfs_option_sfssup",
 630                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_SFSSUP,
 631                         NULL, HFILL }
 632                 },
 633                 { &hf_ismp_edp_sfs_option_lsp,
 634                         { "LSP Support", "ismp.edp.sfs_option_lsp",
 635                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_LSP,
 636                         NULL, HFILL }
 637                 },
 638                 { &hf_ismp_edp_sfs_option_flood,
 639                         { "Flood Path Support", "ismp.edp.sfs_option_flood",
 640                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_FLOOD,
 641                         NULL, HFILL }
 642                 },
 643                 { &hf_ismp_edp_sfs_option_resolve,
 644                         { "Resolve Support", "ismp.edp.sfs_option_resolve",
 645                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_RESOLVE,
 646                         NULL, HFILL }
 647                 },
 648                 { &hf_ismp_edp_sfs_option_unused2,
 649                         { "Unused", "ismp.edp.sfs_option_unused2",
 650                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_UNUSED2,
 651                         NULL, HFILL }
 652                 },
 653                 { &hf_ismp_edp_sfs_option_tagflood,
 654                         { "Tagged Flood Support", "ismp.edp.sfs_option_tagflood",
 655                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_TAGFLOOD,
 656                         NULL, HFILL }
 657                 },
 658                 { &hf_ismp_edp_sfs_option_calltap,
 659                         { "Call Tap Support", "ismp.edp.sfs_option_calltap",
 660                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_CALLTAP,
 661                         NULL, HFILL }
 662                 },
 663                 { &hf_ismp_edp_sfs_option_conmsg,
 664                         { "Connection Message Support", "ismp.edp.sfs_option_conmsg",
 665                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_CONMSG,
 666                         NULL, HFILL }
 667                 },
 668                 { &hf_ismp_edp_sfs_option_redun,
 669                         { "Redundant Access Support", "ismp.edp.sfs_option_redun",
 670                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_REDUN,
 671                         NULL, HFILL }
 672                 },
 673                 { &hf_ismp_edp_sfs_option_isolated,
 674                         { "Isolated Switch", "ismp.edp.sfs_option_isolated",
 675                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_ISOLATED,
 676                         NULL, HFILL }
 677                 },
 678                 { &hf_ismp_edp_sfs_option_uplink_switch,
 679                         { "Uplink Switch", "ismp.edp.sfs_option_uplink_switch",
 680                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_UPLINK_SWITCH,
 681                         NULL, HFILL }
 682                 },
 683                 { &hf_ismp_edp_sfs_option_uplink_core,
 684                         { "Uplink Core", "ismp.edp.sfs_option_uplink_core",
 685                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_UPLINK_CORE,
 686                         NULL, HFILL }
 687                 },
 688                 { &hf_ismp_edp_sfs_option_uplink_port,
 689                         { "Uplink Port", "ismp.edp.sfs_option_uplink_port",
 690                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_UPLINK_PORT,
 691                         NULL, HFILL }
 692                 },
 693                 { &hf_ismp_edp_sfs_option_uplink_flood,
 694                         { "Uplink Flood Support", "ismp.edp.sfs_option_uplink_flood",
 695                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SFS_OPTION_UPLINK_FLOOD,
 696                         NULL, HFILL }
 697                 },
 698                 { &hf_ismp_edp_rtr_option_ssr,
 699                         { "SSR Type Device", "ismp.edp.rtr_option_ssr",
 700                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_SSR,
 701                         NULL, HFILL }
 702                 },
 703                 { &hf_ismp_edp_rtr_option_igmp,
 704                         { "IGMP Active", "ismp.edp.rtr_option_igmp",
 705                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_IGMP,
 706                         NULL, HFILL }
 707                 },
 708                 { &hf_ismp_edp_rtr_option_rip,
 709                         { "RIP Active", "ismp.edp.rtr_option_rip",
 710                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_RIP,
 711                         NULL, HFILL }
 712                 },
 713                 { &hf_ismp_edp_rtr_option_bgp,
 714                         { "BGP Active", "ismp.edp.rtr_option_bgp",
 715                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_BGP,
 716                         NULL, HFILL }
 717                 },
 718                 { &hf_ismp_edp_rtr_option_ospf,
 719                         { "OSPF Active", "ismp.edp.rtr_option_ospf",
 720                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_OSPF,
 721                         NULL, HFILL }
 722                 },
 723                 { &hf_ismp_edp_rtr_option_dvmrp,
 724                         { "DVMRP Active", "ismp.edp.rtr_option_dvmrp",
 725                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_DVMRP,
 726                         NULL, HFILL }
 727                 },
 728                 { &hf_ismp_edp_rtr_option_8021q,
 729                         { "802.1Q Support", "ismp.edp.rtr_option_8021q",
 730                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_8021Q,
 731                         NULL, HFILL }
 732                 },
 733                 { &hf_ismp_edp_rtr_option_gvrp,
 734                         { "GVRP Support", "ismp.edp.rtr_option_gvrp",
 735                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_GVRP,
 736                         NULL, HFILL }
 737                 },
 738                 { &hf_ismp_edp_rtr_option_gmrp,
 739                         { "GMRP Support", "ismp.edp.rtr_option_gmrp",
 740                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_GMRP,
 741                         NULL, HFILL }
 742                 },
 743                 { &hf_ismp_edp_rtr_option_igmp_snoop,
 744                         { "IGMP Snooping Support", "ismp.edp.rtr_option_igmp_snoop",
 745                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_IGMP_SNOOP,
 746                         NULL, HFILL }
 747                 },
 748                 { &hf_ismp_edp_rtr_option_route,
 749                         { "Route Bridging", "ismp.edp.rtr_option_route",
 750                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_ROUTE,
 751                         NULL, HFILL }
 752                 },
 753                 { &hf_ismp_edp_rtr_option_trans,
 754                         { "Transparent Bridging", "ismp.edp.rtr_option_trans",
 755                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_TRANS,
 756                         NULL, HFILL }
 757                 },
 758                 { &hf_ismp_edp_rtr_option_level1,
 759                         { "Level 1 Functionality", "ismp.edp.rtr_option_level1",
 760                         FT_BOOLEAN, 32, TFS(&is_set), EDP_RTR_OPTION_LEVEL1,
 761                         NULL, HFILL }
 762                 },
 763                 { &hf_ismp_edp_switch_option_8021q,
 764                         { "802.1Q Support", "ismp.edp.switch_option_8021q",
 765                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SWITCH_OPTION_8021Q,
 766                         NULL, HFILL }
 767                 },
 768                 { &hf_ismp_edp_switch_option_gvrp,
 769                         { "GVRP Support", "ismp.edp.switch_option_gvrp",
 770                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SWITCH_OPTION_GVRP,
 771                         NULL, HFILL }
 772                 },
 773                 { &hf_ismp_edp_switch_option_gmrp,
 774                         { "GMRP Support", "ismp.edp.switch_option_gmrp",
 775                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SWITCH_OPTION_GMRP,
 776                         NULL, HFILL }
 777                 },
 778                 { &hf_ismp_edp_switch_option_igmp,
 779                         { "IGMP Snooping Support", "ismp.edp.switch_option_igmp",
 780                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SWITCH_OPTION_IGMP,
 781                         NULL, HFILL }
 782                 },
 783                 { &hf_ismp_edp_switch_option_route,
 784                         { "Route Bridging", "ismp.edp.switch_option_route",
 785                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SWITCH_OPTION_ROUTE,
 786                         NULL, HFILL }
 787                 },
 788                 { &hf_ismp_edp_switch_option_trans,
 789                         { "Transparent Bridging", "ismp.edp.switch_option_trans",
 790                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SWITCH_OPTION_TRANS,
 791                         NULL, HFILL }
 792                 },
 793                 { &hf_ismp_edp_switch_option_level1,
 794                         { "Level 1 Functionality", "ismp.edp.switch_option_level1",
 795                         FT_BOOLEAN, 32, TFS(&is_set), EDP_SWITCH_OPTION_LEVEL1,
 796                         NULL, HFILL }
 797                 },
 798                 { &hf_ismp_edp_end_station_option_dhcp,
 799                         { "DHCP Enabled", "ismp.edp.end_station_option_dhcp",
 800                         FT_BOOLEAN, 32, TFS(&is_set), EDP_END_STATION_OPTION_DHCP,
 801                         NULL, HFILL }
 802                 },
 803                 { &hf_ismp_edp_end_station_option_dns,
 804                         { "DNS Enabled", "ismp.edp.end_station_option_dns",
 805                         FT_BOOLEAN, 32, TFS(&is_set), EDP_END_STATION_OPTION_DNS,
 806                         NULL, HFILL }
 807                 },
 808                 { &hf_ismp_edp_end_station_option_ad,
 809                         { "Active Directory Enabled", "ismp.edp.end_station_option_ad",
 810                         FT_BOOLEAN, 32, TFS(&is_set), EDP_END_STATION_OPTION_AD,
 811                         NULL, HFILL }
 812                 },
 813                 { &hf_ismp_edp_num_neighbors,
 814                         { "Number of Known Neighbors", "ismp.edp.maccount",
 815                         FT_UINT16, BASE_DEC, NULL, 0x0,
 816                         NULL, HFILL }
 817                 },
 818                 { &hf_ismp_edp_neighbors,
 819                         { "Neighbors", "ismp.edp.nbrs",
 820                         FT_BYTES, BASE_NONE, NULL, 0x0,
 821                         NULL, HFILL }
 822                 },
 823                 { &hf_ismp_edp_num_tuples,
 824                         { "Number of Tuples", "ismp.edp.numtups",
 825                         FT_UINT16, BASE_DEC, NULL, 0x0,
 826                         NULL, HFILL }
 827                 },
 828                 { &hf_ismp_edp_tuples,
 829                         { "Number of Tuples", "ismp.edp.tups",
 830                         FT_BYTES, BASE_NONE, NULL, 0x0,
 831                         NULL, HFILL }
 832                 },
 833         };
 834
 835 /* Setup protocol subtree array */
 836         static gint *ett[] = {
 837                 &ett_ismp,
 838                 &ett_ismp_edp,
 839                 &ett_ismp_edp_options,
 840                 &ett_ismp_edp_neighbors,
 841                 &ett_ismp_edp_neighbors_leaf,
 842                 &ett_ismp_edp_tuples,
 843                 &ett_ismp_edp_tuples_leaf,
 844         };
 845
 846 /* Register the protocol name and description */
 847         proto_ismp = proto_register_protocol("InterSwitch Message Protocol",
 848             "ISMP", "ismp");
 849
 850 /* Required function calls to register the header fields and subtrees used */
 851         proto_register_field_array(proto_ismp, hf, array_length(hf));
 852         proto_register_subtree_array(ett, array_length(ett));
 853 }
 854
 855
 856 /* If this dissector uses sub-dissector registration add a registration routine.
 857    This format is required because a script is used to find these routines and
 858    create the code that calls these routines.
 859 */
 860 void
 861 proto_reg_handoff_ismp(void)
 862 {
 863         dissector_handle_t ismp_handle;
 864
 865         ismp_handle = create_dissector_handle(dissect_ismp,
 866             proto_ismp);
 867         dissector_add_uint("ethertype", ETHERTYPE_ISMP, ismp_handle);
 868 }