epan/dissectors/packet-hpsw.c

   1 /* packet-hpsw.c
   2  * Routines for HP Switch Config protocol
   3  * Charlie Lenahan <clenahan@fortresstech.com>
   4  *
   5  * Wireshark - Network traffic analyzer
   6  * By Gerald Combs <gerald@wireshark.org>
   7  * Copyright 1998 Gerald Combs
   8  *
   9  * SPDX-License-Identifier: GPL-2.0-or-later
  10  */
  11
  12 #include "config.h"
  13
  14 #include <epan/packet.h>
  15 #include <epan/expert.h>
  16
  17 #include "packet-hpext.h"
  18
  19 void proto_register_hpsw(void);
  20 void proto_reg_handoff_hpsw(void);
  21
  22 static int proto_hpsw;
  23
  24 static int hf_hpsw_version;
  25 static int hf_hpsw_type;
  26 static int hf_hpsw_tlvtype;
  27 static int hf_hpsw_tlvlength;
  28 static int hf_hpsw_field_10;
  29 static int hf_hpsw_own_mac_addr;
  30 static int hf_hpsw_neighbor_mac_addr;
  31 static int hf_hpsw_field_6;
  32 static int hf_hpsw_field_9;
  33 static int hf_hpsw_device_version;
  34 static int hf_hpsw_device_name;
  35 static int hf_hpsw_ip_addr;
  36 static int hf_hpsw_field_8;
  37 static int hf_hpsw_domain;
  38 static int hf_hpsw_field_12;
  39 static int hf_hpsw_config_name;
  40 static int hf_hpsw_root_mac_addr;
  41 static int hf_hpsw_device_id;
  42 static int hf_hpsw_device_id_data;
  43 static int hf_hpsw_data;
  44
  45
  46 static int ett_hpsw;
  47 static int ett_hpsw_tlv;
  48
  49 static expert_field ei_hpsw_tlvlength_bad;
  50
  51 static dissector_handle_t hpsw_handle;
  52
  53 #define HPFOO_DEVICE_NAME     0x1
  54 #define HPFOO_DEVICE_VERSION  0x2
  55 #define HPFOO_CONFIG_NAME     0x3
  56 #define HPFOO_ROOT_MAC_ADDR   0x4
  57 #define HPFOO_IP_ADDR         0x5
  58 #define HPFOO_FIELD_6         0x6
  59 #define HPFOO_DOMAIN          0x7
  60 #define HPFOO_FIELD_8         0x8
  61 #define HPFOO_FIELD_9         0x9
  62 #define HPFOO_FIELD_10        0xa
  63 #define HPFOO_NEIGHBORS       0xb
  64 #define HPFOO_FIELD_12        0xc
  65 #define HPFOO_DEVICE_ID       0xd
  66 #define HPFOO_OWN_MAC_ADDR    0xe
  67
  68 static const value_string hpsw_tlv_type_vals[] = {
  69     { HPFOO_DEVICE_NAME,    "Device Name" },
  70     { HPFOO_DEVICE_VERSION, "Version" },
  71     { HPFOO_CONFIG_NAME,    "Config Name" },
  72     { HPFOO_ROOT_MAC_ADDR,  "Root MAC Addr" },
  73     { HPFOO_IP_ADDR,        "IP Addr" },
  74     { HPFOO_FIELD_6,        "Field 6" },
  75     { HPFOO_DOMAIN,         "Domain" },
  76     { HPFOO_FIELD_8,        "Field 8" },
  77     { HPFOO_FIELD_9,        "Field 9" },
  78     { HPFOO_FIELD_10,       "Field 10" },
  79     { HPFOO_NEIGHBORS,      "Neighbors" },
  80     { HPFOO_FIELD_12,       "Field 12" },
  81     { HPFOO_DEVICE_ID,      "Device ID" },
  82     { HPFOO_OWN_MAC_ADDR,   "2nd MAC Addr" },
  83     { 0x00,                 NULL }
  84 };
  85
  86 static void
  87 dissect_hpsw_tlv(tvbuff_t *tvb, packet_info *pinfo, int offset, int length,
  88                  proto_tree *tree, proto_item *ti, uint8_t type)
  89 {
  90     switch (type) {
  91
  92     case HPFOO_DEVICE_NAME:
  93         if (length > 0) {
  94             proto_tree_add_item(tree, hf_hpsw_device_name, tvb, offset, length, ENC_NA|ENC_ASCII);
  95         } else {
  96             expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Device Name: Bad length %u", length);
  97         }
  98         break;
  99
 100     case HPFOO_DEVICE_VERSION:
 101         if (length > 0) {
 102             proto_tree_add_item(tree, hf_hpsw_device_version, tvb, offset, length, ENC_NA|ENC_ASCII);
 103         } else {
 104             expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Version: Bad length %u", length);
 105         }
 106         break;
 107
 108     case HPFOO_CONFIG_NAME:
 109         if (length > 0) {
 110             proto_tree_add_item(tree, hf_hpsw_config_name, tvb, offset, length, ENC_NA|ENC_ASCII);
 111         } else {
 112             expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Config Name: Bad length %u", length);
 113         }
 114         break;
 115
 116     case HPFOO_ROOT_MAC_ADDR:
 117         if (length == 6) {
 118             proto_tree_add_item(tree, hf_hpsw_root_mac_addr, tvb, offset, length, ENC_NA);
 119         } else {
 120             expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Root MAC Addr: Bad length %u", length);
 121         }
 122         break;
 123
 124     case HPFOO_IP_ADDR:
 125         if (length == 4) {
 126             proto_tree_add_item(tree, hf_hpsw_ip_addr, tvb, offset, length, ENC_BIG_ENDIAN);
 127         } else {
 128             expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "IP Addr: Bad length %u", length);
 129         }
 130         break;
 131
 132     case HPFOO_FIELD_6:
 133         if (length == 2) {
 134             proto_tree_add_item(tree, hf_hpsw_field_6, tvb, offset, length, ENC_BIG_ENDIAN);
 135         } else {
 136             expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Field 6: Bad length %u", length);
 137         }
 138         break;
 139
 140     case HPFOO_DOMAIN:
 141         if (length > 0) {
 142             proto_tree_add_item(tree, hf_hpsw_domain, tvb, offset, length, ENC_NA|ENC_ASCII);
 143         } else {
 144             expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Domain: Bad length %u", length);
 145         }
 146         break;
 147
 148     case HPFOO_FIELD_8:
 149         if (length == 2) {
 150             proto_tree_add_item(tree, hf_hpsw_field_8, tvb, offset, length, ENC_BIG_ENDIAN);
 151         } else {
 152             expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Field 8: Bad length %u", length);
 153         }
 154         break;
 155
 156     case HPFOO_FIELD_9:
 157         if (length == 2) {
 158             proto_tree_add_item(tree, hf_hpsw_field_9, tvb, offset, length, ENC_BIG_ENDIAN);
 159         } else {
 160             expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Field 9: Bad length %u", length);
 161         }
 162         break;
 163
 164     case HPFOO_FIELD_10:
 165         if (length == 4) {
 166             proto_tree_add_item(tree, hf_hpsw_field_10, tvb, offset, length, ENC_BIG_ENDIAN);
 167         } else {
 168             expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Field 10: Bad length %u", length);
 169         }
 170         break;
 171
 172     case HPFOO_NEIGHBORS:
 173         if (!(length % 6))
 174         {   int i = length/6;
 175             proto_item_set_text(proto_tree_get_parent(tree), "Number of neighbor MAC Addresses: %u", i);
 176             for ( ; i; i--)
 177             {
 178                 proto_tree_add_item(tree, hf_hpsw_neighbor_mac_addr, tvb, offset, 6, ENC_NA);
 179                 offset += 6;
 180             }
 181         } else {
 182             expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Neighbors: Bad length %u", length);
 183         }
 184         break;
 185
 186     case HPFOO_FIELD_12:
 187         if (length == 1) {
 188             proto_tree_add_item(tree, hf_hpsw_field_12, tvb, offset, length, ENC_BIG_ENDIAN);
 189         } else {
 190             expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Field 12: Bad length %u", length);
 191         }
 192         break;
 193
 194     case HPFOO_DEVICE_ID:
 195         if (length > 6) {
 196             proto_tree_add_item(tree, hf_hpsw_device_id, tvb, offset, 6, ENC_NA);
 197             proto_tree_add_item(tree, hf_hpsw_device_id_data, tvb, offset+6, length-6, ENC_NA);
 198         } else {
 199             expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Device ID: Bad length %u", length);
 200         }
 201         break;
 202
 203     case HPFOO_OWN_MAC_ADDR:
 204         if (length == 6) {
 205             proto_tree_add_item(tree, hf_hpsw_own_mac_addr, tvb, offset, length, ENC_NA);
 206         } else {
 207             expert_add_info_format(pinfo, ti, &ei_hpsw_tlvlength_bad, "Own MAC Addr: Bad length %u", length);
 208         }
 209         break;
 210
 211     default:
 212         proto_tree_add_item(tree, hf_hpsw_data, tvb, offset, length, ENC_NA);
 213         break;
 214     }
 215 }
 216
 217 static int
 218 dissect_hpsw(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
 219 {
 220     proto_tree *hp_tree;
 221     proto_tree *tlv_tree;
 222     proto_item *ti;
 223     uint8_t     version;
 224     int         offset = 0;
 225
 226     col_set_str(pinfo->cinfo, COL_PROTOCOL, "HP");
 227     col_set_str(pinfo->cinfo, COL_INFO, "HP Switch Protocol");
 228
 229     version = tvb_get_uint8(tvb, 0);
 230
 231     ti = proto_tree_add_item(tree, proto_hpsw, tvb, 0, -1, ENC_NA);
 232     hp_tree = proto_item_add_subtree(ti, ett_hpsw);
 233     proto_tree_add_uint(hp_tree, hf_hpsw_version, tvb, 0, 1, version);
 234     offset += 1;
 235
 236     proto_tree_add_item(hp_tree, hf_hpsw_type, tvb, 1, 1, ENC_BIG_ENDIAN);
 237     offset += 1;
 238
 239     while ( tvb_reported_length_remaining(tvb, offset) > 0 )
 240     {
 241         uint8_t type, length;
 242
 243         type   = tvb_get_uint8(tvb, offset);
 244         length = tvb_get_uint8(tvb, offset+1);
 245
 246         /* make sure still in valid tlv */
 247         if (( length < 1 ) || ( length > tvb_reported_length_remaining(tvb, offset+2)))
 248             break;
 249
 250         tlv_tree = proto_tree_add_subtree(hp_tree, tvb, offset, length+2, ett_hpsw_tlv, NULL,
 251                                  val_to_str(type, hpsw_tlv_type_vals, "Unknown TLV type: 0x%02x"));
 252
 253         /* type */
 254         proto_tree_add_uint(tlv_tree, hf_hpsw_tlvtype, tvb, offset, 1, type);
 255         offset += 1;
 256
 257         /* LENGTH (not inclusive of type and length bytes) */
 258         ti = proto_tree_add_uint(tlv_tree, hf_hpsw_tlvlength, tvb, offset, 1, length);
 259         offset += 1;
 260
 261         dissect_hpsw_tlv(tvb, pinfo, offset, length, tlv_tree, ti, type);
 262
 263         offset += length;
 264
 265     }
 266     return tvb_captured_length(tvb);
 267 }
 268
 269 void
 270 proto_register_hpsw(void)
 271 {
 272     static hf_register_info hf[] = {
 273         { &hf_hpsw_version,
 274           { "Version", "hpsw.version", FT_UINT8, BASE_HEX,
 275             NULL, 0x0, NULL, HFILL }},
 276         { &hf_hpsw_type,
 277           { "Type", "hpsw.type", FT_UINT8, BASE_HEX,
 278             NULL, 0x0, NULL, HFILL }},
 279         { &hf_hpsw_tlvtype,
 280           { "Type", "hpsw.tlv_type", FT_UINT8, BASE_HEX,
 281             VALS(hpsw_tlv_type_vals), 0x0, NULL, HFILL }},
 282         { &hf_hpsw_tlvlength,
 283           { "Length", "hpsw.tlv_len", FT_UINT8, BASE_DEC,
 284             NULL, 0x0, NULL, HFILL }},
 285         { &hf_hpsw_device_name,
 286           { "Device Name", "hpsw.device_name", FT_STRING, BASE_NONE,
 287             NULL, 0x0, NULL, HFILL }},
 288         { &hf_hpsw_device_version,
 289           { "Version", "hpsw.device_version", FT_STRING, BASE_NONE,
 290             NULL, 0x0, NULL, HFILL }},
 291         { &hf_hpsw_config_name,
 292           { "Config Name", "hpsw.config_name", FT_STRING, BASE_NONE,
 293             NULL, 0x0, NULL, HFILL }},
 294         { &hf_hpsw_root_mac_addr,
 295           { "Root MAC Addr", "hpsw.root_mac_addr", FT_ETHER, BASE_NONE,
 296             NULL, 0x0, NULL, HFILL }},
 297         { &hf_hpsw_ip_addr,
 298           { "IP Addr", "hpsw.ip_addr", FT_IPv4, BASE_NONE,
 299             NULL, 0x0, NULL, HFILL }},
 300         { &hf_hpsw_field_6,
 301           { "Field 6", "hpsw.field_6", FT_UINT16, BASE_HEX,
 302             NULL, 0x0, NULL, HFILL }},
 303         { &hf_hpsw_domain,
 304           { "Domain", "hpsw.domain", FT_STRING, BASE_NONE,
 305             NULL, 0x0, NULL, HFILL }},
 306         { &hf_hpsw_field_8,
 307           { "Field 8", "hpsw.field_8", FT_UINT16, BASE_HEX,
 308             NULL, 0x0, NULL, HFILL }},
 309         { &hf_hpsw_field_9,
 310           { "Field 9", "hpsw.field_9", FT_UINT16, BASE_HEX,
 311             NULL, 0x0, NULL, HFILL }},
 312         { &hf_hpsw_field_10,
 313           { "Field 10", "hpsw.field_10", FT_UINT32, BASE_HEX,
 314             NULL, 0x0, NULL, HFILL }},
 315         { &hf_hpsw_neighbor_mac_addr,
 316           { "MAC Addr", "hpsw.neighbor_mac_addr", FT_ETHER, BASE_NONE,
 317             NULL, 0x0, NULL, HFILL }},
 318         { &hf_hpsw_field_12,
 319           { "Field 12", "hpsw.field_12", FT_UINT8, BASE_HEX,
 320             NULL, 0x0, NULL, HFILL }},
 321         { &hf_hpsw_own_mac_addr,
 322           { "Own MAC Addr", "hpsw.own_mac_addr", FT_ETHER, BASE_NONE,
 323             NULL, 0x0, NULL, HFILL }},
 324         { &hf_hpsw_device_id,
 325           { "Device ID", "hpsw.device_id", FT_ETHER, BASE_NONE,
 326             NULL, 0x0, NULL, HFILL }},
 327         { &hf_hpsw_device_id_data,
 328           { "Data", "hpsw.device_id_data", FT_BYTES, BASE_NONE,
 329             NULL, 0x0, NULL, HFILL }},
 330         { &hf_hpsw_data,
 331           { "Data", "hpsw.data", FT_BYTES, BASE_NONE,
 332             NULL, 0x0, NULL, HFILL }},
 333     };
 334
 335     static int *ett[] = {
 336         &ett_hpsw,
 337         &ett_hpsw_tlv
 338     };
 339
 340     static ei_register_info ei[] = {
 341         { &ei_hpsw_tlvlength_bad, { "hpsw.tlv_len.bad", PI_PROTOCOL, PI_WARN, "Bad length", EXPFILL }},
 342     };
 343
 344     expert_module_t* expert_hpsw;
 345
 346     proto_hpsw = proto_register_protocol( "HP Switch Protocol", "HPSW", "hpsw");
 347     proto_register_field_array(proto_hpsw, hf, array_length(hf));
 348     proto_register_subtree_array(ett, array_length(ett));
 349     expert_hpsw = expert_register_protocol(proto_hpsw);
 350     expert_register_field_array(expert_hpsw, ei, array_length(ei));
 351
 352     hpsw_handle = register_dissector("hpsw", dissect_hpsw, proto_hpsw);
 353 }
 354
 355 void
 356 proto_reg_handoff_hpsw(void)
 357 {
 358     dissector_add_uint("hpext.dxsap", HPEXT_HPSW, hpsw_handle);
 359 }
 360
 361 /*
 362  * Editor modelines
 363  *
 364  * Local Variables:
 365  * c-basic-offset: 4
 366  * tab-width: 8
 367  * indent-tabs-mode: nil
 368  * End:
 369  *
 370  * ex: set shiftwidth=4 tabstop=8 expandtab:
 371  * :indentSize=4:tabSize=8:noTabs=true:
 372  */