1 /* packet-cdp.c
2 * Routines for the disassembly of the "Cisco Discovery Protocol"
3 * (c) Copyright Hannes R. Boehm <hannes@boehm.org>
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 #include <epan/to_str.h>
17 #include <epan/in_cksum.h>
18 #include <epan/nlpid.h>
19 #include <epan/etypes.h>
20 #include <epan/cisco_pid.h>
21
22 /*
23 * See
24 *
25 * http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/cdp/configuration/15-mt/cdp-15-mt-book/nm-cdp-discover.html#GUID-84FBA50B-677C-4D90-AF56-2FB96F2DC085
26 *
27 * and
28 *
29 * http://www.cisco.com/c/en/us/support/docs/switches/catalyst-4500-series-switches/13414-103.html#cdp
30 *
31 * for some more information on CDP version 2 (a superset of version 1).
32 *
33 * Also see
34 *
35 * http://www.rhyshaden.com/cdp.htm
36 */
37
38 void proto_register_cdp(void);
39 void proto_reg_handoff_cdp(void);
40
41 /* Offsets in TLV structure. */
42 #define TLV_TYPE 0
43 #define TLV_LENGTH 2
44
45 static int proto_cdp = -1;
46 static int hf_cdp_version = -1;
47 static int hf_cdp_checksum = -1;
48 static int hf_cdp_checksum_status = -1;
49 static int hf_cdp_ttl = -1;
50 static int hf_cdp_tlvtype = -1;
51 static int hf_cdp_tlvlength = -1;
52 static int hf_cdp_nrgyz_tlvtype = -1;
53 static int hf_cdp_nrgyz_tlvlength = -1;
54 static int hf_cdp_deviceid = -1;
55 static int hf_cdp_platform = -1;
56 static int hf_cdp_portid = -1;
57 static int hf_cdp_capabilities = -1;
58 static int hf_cdp_capabilities_router = -1;
59 static int hf_cdp_capabilities_trans_bridge = -1;
60 static int hf_cdp_capabilities_src_bridge = -1;
61 static int hf_cdp_capabilities_switch = -1;
62 static int hf_cdp_capabilities_host = -1;
63 static int hf_cdp_capabilities_igmp_capable = -1;
64 static int hf_cdp_capabilities_repeater = -1;
65 static int hf_cdp_capabilities_voip_phone = -1;
66 static int hf_cdp_capabilities_remote = -1;
67 static int hf_cdp_capabilities_cvta = -1;
68 static int hf_cdp_capabilities_mac_relay = -1;
69 static int hf_cdp_spare_poe_tlv = -1;
70 static int hf_cdp_spare_poe_tlv_poe = -1;
71 static int hf_cdp_spare_poe_tlv_spare_pair_arch = -1;
72 static int hf_cdp_spare_poe_tlv_req_spare_pair_poe = -1;
73 static int hf_cdp_spare_poe_tlv_pse_spare_pair_poe = -1;
74
75 /* Generated from convert_proto_tree_add_text.pl */
76 static int hf_cdp_num_tlvs_table = -1;
77 static int hf_cdp_encrypted_data = -1;
78 static int hf_cdp_cluster_ip = -1;
79 static int hf_cdp_nrgyz_reply_to_backup_server_ip = -1;
80 static int hf_cdp_nrgyz_reply_to_port = -1;
81 static int hf_cdp_unknown_pad = -1;
82 static int hf_cdp_cluster_version = -1;
83 static int hf_cdp_hello_unknown = -1;
84 static int hf_cdp_management_id = -1;
85 static int hf_cdp_data = -1;
86 static int hf_cdp_nrgyz_reply_to_ip_address = -1;
87 static int hf_cdp_nrgyz_reply_to_name = -1;
88 static int hf_cdp_nrgyz_reply_to_domain = -1;
89 static int hf_cdp_nrgyz_reply_to_role = -1;
90 static int hf_cdp_nrgyz_ip_address = -1;
91 static int hf_cdp_nrgyz_ip6_address = -1;
92 static int hf_cdp_model_number = -1;
93 static int hf_cdp_nrgyz_reply_to_unknown_field = -1;
94 static int hf_cdp_len_tlv_table = -1;
95 static int hf_cdp_vtp_management_domain = -1;
96 static int hf_cdp_hardware_version_id = -1;
97 static int hf_cdp_cluster_unknown = -1;
98 static int hf_cdp_native_vlan = -1;
99 static int hf_cdp_ip_prefix = -1;
100 static int hf_cdp_odr_default_gateway = -1;
101 static int hf_cdp_power_consumption = -1;
102 static int hf_cdp_cluster_status = -1;
103 static int hf_cdp_power_requested = -1;
104 static int hf_cdp_trust_bitmap = -1;
105 static int hf_cdp_seen_sequence = -1;
106 static int hf_cdp_system_name = -1;
107 static int hf_cdp_power_available = -1;
108 static int hf_cdp_cluster_commander_mac = -1;
109 static int hf_cdp_mtu = -1;
110 static int hf_cdp_protocol_length = -1;
111 static int hf_cdp_system_serial_number = -1;
112 static int hf_cdp_sequence_number = -1;
113 static int hf_cdp_duplex = -1;
114 static int hf_cdp_voice_vlan = -1;
115 static int hf_cdp_request_id = -1;
116 static int hf_cdp_cluster_sub_version = -1;
117 static int hf_cdp_oui = -1;
118 static int hf_cdp_nrgyz_reply_to_backup_server_port = -1;
119 static int hf_cdp_cluster_master_ip = -1;
120 static int hf_cdp_protocol = -1;
121 static int hf_cdp_protocol_type = -1;
122 static int hf_cdp_address = -1;
123 static int hf_cdp_system_object_identifier = -1;
124 static int hf_cdp_location_unknown = -1;
125 static int hf_cdp_nrgyz_unknown_values = -1;
126 static int hf_cdp_address_length = -1;
127 static int hf_cdp_protocol_id = -1;
128 static int hf_cdp_cluster_switch_mac = -1;
129 static int hf_cdp_location = -1;
130 static int hf_cdp_untrusted_port_cos = -1;
131 static int hf_cdp_number_of_addresses = -1;
132 static int hf_cdp_cluster_management_vlan = -1;
133 static int hf_cdp_software_version = -1;
134
135 static gint ett_cdp = -1;
136 static gint ett_cdp_tlv = -1;
137 static gint ett_cdp_nrgyz_tlv = -1;
138 static gint ett_cdp_address = -1;
139 static gint ett_cdp_capabilities = -1;
140 static gint ett_cdp_spare_poe_tlv = -1;
141 static gint ett_cdp_checksum = -1;
142
143 static expert_field ei_cdp_invalid_data = EI_INIT;
144 static expert_field ei_cdp_nrgyz_tlvlength = EI_INIT;
145 static expert_field ei_cdp_checksum = EI_INIT;
146
147 static int
148 dissect_address_tlv(tvbuff_t *tvb, packet_info* pinfo, int offset, int length, proto_tree *tree);
149 static void
150 dissect_capabilities(tvbuff_t *tvb, int offset, int length, proto_tree *tree);
151 static void
152 dissect_nrgyz_tlv(tvbuff_t *tvb, packet_info* pinfo, int offset, guint16 length, guint16 num,
153 proto_tree *tree);
154 static void
155 dissect_spare_poe_tlv(tvbuff_t *tvb, int offset, int length, proto_tree *tree);
156 static void
157 add_multi_line_string_to_tree(proto_tree *tree, tvbuff_t *tvb, gint start,
158 gint len, int hf);
159
160 #define TYPE_DEVICE_ID 0x0001
161 #define TYPE_ADDRESS 0x0002
162 #define TYPE_PORT_ID 0x0003
163 #define TYPE_CAPABILITIES 0x0004
164 #define TYPE_IOS_VERSION 0x0005
165 #define TYPE_PLATFORM 0x0006
166 #define TYPE_IP_PREFIX 0x0007
167 #define TYPE_PROTOCOL_HELLO 0x0008 /* Protocol Hello */
168 #define TYPE_VTP_MGMT_DOMAIN 0x0009 /* VTP Domain, CTPv2 - see second URL */
169 #define TYPE_NATIVE_VLAN 0x000a /* Native VLAN, CTPv2 - see second URL */
170 #define TYPE_DUPLEX 0x000b /* Full/Half Duplex - see second URL */
171 /* 0x000c */
172 /* 0x000d */
173 #define TYPE_VOIP_VLAN_REPLY 0x000e /* VoIP VLAN reply */
174 #define TYPE_VOIP_VLAN_QUERY 0x000f /* VoIP VLAN query */
175 #define TYPE_POWER 0x0010 /* Power consumption */
176 #define TYPE_MTU 0x0011 /* MTU */
177 #define TYPE_TRUST_BITMAP 0x0012 /* Trust bitmap */
178 #define TYPE_UNTRUSTED_COS 0x0013 /* Untrusted port CoS */
179 #define TYPE_SYSTEM_NAME 0x0014 /* System Name */
180 #define TYPE_SYSTEM_OID 0x0015 /* System OID */
181 #define TYPE_MANAGEMENT_ADDR 0x0016 /* Management Address(es) */
182 #define TYPE_LOCATION 0x0017 /* Location */
183 #define TYPE_EXT_PORT_ID 0x0018 /* External Port-ID */
184 #define TYPE_POWER_REQUESTED 0x0019 /* Power Requested */
185 #define TYPE_POWER_AVAILABLE 0x001a /* Power Available */
186 #define TYPE_PORT_UNIDIR 0x001b /* Port Unidirectional */
187 #define TYPE_NRGYZ 0x001d /* EnergyWise over CDP */
188 #define TYPE_SPARE_POE 0x001f /* Spare Pair PoE */
189
190 #define TYPE_HP_BSSID 0x1000 /* BSSID */
191 #define TYPE_HP_SERIAL 0x1001 /* Serial number */
192 #define TYPE_HP_SSID 0x1002 /* SSID */
193 #define TYPE_HP_RADIO1_CH 0x1003 /* Radio1 channel */
194 /* 0x1004 */
195 /* 0x1005 */
196 #define TYPE_HP_SNMP_PORT 0x1006 /* SNMP listening UDP port */
197 #define TYPE_HP_MGMT_PORT 0x1007 /* Web interface TCP port */
198 #define TYPE_HP_SOURCE_MAC 0x1008 /* Sender MAC address for the AP, bouth wired and wireless */
199 #define TYPE_HP_RADIO2_CH 0x1009 /* Radio2 channel */
200 #define TYPE_HP_RADIO1_OMODE 0x100A /* Radio1 Operating mode */
201 #define TYPE_HP_RADIO2_OMODE 0x100B /* Radio2 Operating mode */
202 #define TYPE_HP_RADIO1_RMODE 0x100C /* Radio1 Radio mode */
203 #define TYPE_HP_RADIO2_RMODE 0x100D /* Radio2 Radio mode */
204
205 static const value_string type_vals[] = {
206 { TYPE_DEVICE_ID, "Device ID" },
207 { TYPE_ADDRESS, "Addresses" },
208 { TYPE_PORT_ID, "Port ID" },
209 { TYPE_CAPABILITIES, "Capabilities" },
210 { TYPE_IOS_VERSION, "Software version" },
211 { TYPE_PLATFORM, "Platform" },
212 { TYPE_IP_PREFIX, "IP Prefix/Gateway (used for ODR)" },
213 { TYPE_PROTOCOL_HELLO, "Protocol Hello" },
214 { TYPE_VTP_MGMT_DOMAIN, "VTP Management Domain" },
215 { TYPE_NATIVE_VLAN, "Native VLAN" },
216 { TYPE_DUPLEX, "Duplex" },
217 { TYPE_VOIP_VLAN_REPLY, "VoIP VLAN Reply" },
218 { TYPE_VOIP_VLAN_QUERY, "VoIP VLAN Query" },
219 { TYPE_POWER, "Power consumption" },
220 { TYPE_MTU, "MTU"},
221 { TYPE_TRUST_BITMAP, "Trust Bitmap" },
222 { TYPE_UNTRUSTED_COS, "Untrusted Port CoS" },
223 { TYPE_SYSTEM_NAME, "System Name" },
224 { TYPE_SYSTEM_OID, "System Object ID" },
225 { TYPE_MANAGEMENT_ADDR, "Management Address" },
226 { TYPE_LOCATION, "Location" },
227 { TYPE_EXT_PORT_ID, "External Port-ID" },
228 { TYPE_POWER_REQUESTED, "Power Requested" },
229 { TYPE_POWER_AVAILABLE, "Power Available" },
230 { TYPE_PORT_UNIDIR, "Port Unidirectional" },
231 { TYPE_NRGYZ, "EnergyWise" },
232 { TYPE_SPARE_POE, "Spare PoE" },
233 { TYPE_HP_BSSID, "BSSID" },
234 { TYPE_HP_SERIAL, "Serial number" },
235 { TYPE_HP_SSID, "SSID" },
236 { TYPE_HP_RADIO1_CH, "Radio1 channel" },
237 { TYPE_HP_SNMP_PORT, "SNMP UDP port" },
238 { TYPE_HP_MGMT_PORT, "Web TCP port" },
239 { TYPE_HP_SOURCE_MAC, "Source MAC address" },
240 { TYPE_HP_RADIO2_CH, "Radio2 channel" },
241 { TYPE_HP_RADIO1_OMODE, "Radio1 Operating mode" },
242 { TYPE_HP_RADIO2_OMODE, "Radio2 Operating mode" },
243 { TYPE_HP_RADIO1_RMODE, "Radio1 Radio mode" },
244 { TYPE_HP_RADIO2_RMODE, "Radio2 Radio mode" },
245 { 0, NULL }
246 };
247
248 #define TYPE_HELLO_CLUSTER_MGMT 0x0112
249
250 static const value_string type_hello_vals[] = {
251 { TYPE_HELLO_CLUSTER_MGMT, "Cluster Management" },
252 { 0, NULL }
253 };
254
255 #define TYPE_NRGYZ_ROLE 0x00000007
256 #define TYPE_NRGYZ_DOMAIN 0x00000008
257 #define TYPE_NRGYZ_NAME 0x00000009
258 #define TYPE_NRGYZ_REPLYTO 0x00000017
259
260 static const value_string type_nrgyz_vals[] = {
261 { TYPE_NRGYZ_ROLE, "Role" },
262 { TYPE_NRGYZ_DOMAIN, "Domain" },
263 { TYPE_NRGYZ_NAME, "Name" },
264 { TYPE_NRGYZ_REPLYTO, "Reply To" },
265 { 0, NULL }
266 };
267
268 static const unit_name_string units_mw = { "mW", NULL };
269
270 static int
dissect_cdp(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,void * data _U_)271 dissect_cdp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
272 {
273 proto_item *ti;
274 proto_tree *cdp_tree;
275 int offset = 0;
276 guint16 type;
277 guint16 length, data_length;
278 proto_item *tlvi;
279 proto_tree *tlv_tree;
280 int real_length;
281 guint32 naddresses;
282 guint32 power_avail_len, power_avail;
283 guint32 power_req_len, power_req;
284 gboolean first;
285 int addr_length;
286 vec_t cksum_vec[1];
287
288 col_set_str(pinfo->cinfo, COL_PROTOCOL, "CDP");
289 col_clear(pinfo->cinfo, COL_INFO);
290
291 ti = proto_tree_add_item(tree, proto_cdp, tvb, offset, -1, ENC_NA);
292 cdp_tree = proto_item_add_subtree(ti, ett_cdp);
293
294 /* CDP header */
295 proto_tree_add_item(cdp_tree, hf_cdp_version, tvb, offset, 1, ENC_BIG_ENDIAN);
296 offset += 1;
297
298 proto_tree_add_item(cdp_tree, hf_cdp_ttl, tvb, offset, 1, ENC_NA);
299 offset += 1;
300
301 /* Checksum display & verification code */
302
303 data_length = tvb_reported_length(tvb);
304
305 /* CDP doesn't adhere to RFC 1071 section 2. (B). It incorrectly assumes
306 * checksums are calculated on a big endian platform, therefore i.s.o.
307 * padding odd sized data with a zero byte _at the end_ it sets the last
308 * big endian _word_ to contain the last network _octet_. This byteswap
309 * has to be done on the last octet of network data before feeding it to
310 * the Internet checksum routine.
311 * CDP checksumming code has a bug in the addition of this last _word_
312 * as a signed number into the long word intermediate checksum. When
313 * reducing this long to word size checksum an off-by-one error can be
314 * made. This off-by-one error is compensated for in the last _word_ of
315 * the network data.
316 */
317 if (data_length & 1) {
318 guint8 *padded_buffer;
319 /* Allocate new buffer */
320 padded_buffer = (guint8 *)wmem_alloc(pinfo->pool, data_length+1);
321 tvb_memcpy(tvb, padded_buffer, 0, data_length);
322 /* Swap bytes in last word */
323 padded_buffer[data_length] = padded_buffer[data_length-1];
324 padded_buffer[data_length-1] = 0;
325 /* Compensate off-by-one error */
326 if (padded_buffer[data_length] & 0x80) {
327 padded_buffer[data_length]--;
328 padded_buffer[data_length-1]--;
329 }
330 /* Setup checksum routine data buffer */
331 SET_CKSUM_VEC_PTR(cksum_vec[0], padded_buffer, data_length+1);
332 } else {
333 /* Setup checksum routine data buffer */
334 SET_CKSUM_VEC_TVB(cksum_vec[0], tvb, 0, data_length);
335 }
336
337 proto_tree_add_checksum(cdp_tree, tvb, offset, hf_cdp_checksum, hf_cdp_checksum_status, &ei_cdp_checksum, pinfo, in_cksum(cksum_vec, 1),
338 ENC_BIG_ENDIAN, PROTO_CHECKSUM_VERIFY|PROTO_CHECKSUM_IN_CKSUM);
339 offset += 2;
340
341 while (tvb_reported_length_remaining(tvb, offset) != 0) {
342 tlv_tree = NULL;
343 type = tvb_get_ntohs(tvb, offset + TLV_TYPE);
344 length = tvb_get_ntohs(tvb, offset + TLV_LENGTH);
345 if (length < 4) {
346 if (tree) {
347 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb, offset, 4,
348 ett_cdp_tlv, NULL, "TLV with invalid length %u (< 4)",
349 length);
350 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
351 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
352 }
353 offset += 4;
354 break;
355 }
356
357 switch (type) {
358
359 case TYPE_DEVICE_ID:
360 /* Device ID */
361
362 col_append_fstr(pinfo->cinfo, COL_INFO,
363 "Device ID: %s ",
364 tvb_format_stringzpad(pinfo->pool, tvb, offset + 4, length - 4));
365
366 if (tree) {
367 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb, offset,
368 length, ett_cdp_tlv, NULL, "Device ID: %s",
369 tvb_format_stringzpad(pinfo->pool, tvb, offset + 4, length - 4));
370 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
371 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
372 proto_tree_add_item(tlv_tree, hf_cdp_deviceid, tvb, offset + 4, length - 4, ENC_ASCII|ENC_NA);
373 }
374 offset += length;
375 break;
376
377 case TYPE_PORT_ID:
378 real_length = length;
379 if ((tvb_reported_length_remaining(tvb, offset) >= length + 3) &&
380 (tvb_get_guint8(tvb, offset + real_length) != 0x00) &&
381 (tvb_get_guint8(tvb, offset + real_length) != 0x10)) {
382 /* The length in the TLV doesn't appear to be the
383 length of the TLV, as the byte just past it
384 isn't the first byte of a 2-byte big-endian
385 small integer; make the length of the TLV the length
386 in the TLV, plus 4 bytes for the TLV type and length,
387 minus 1 because that's what makes one capture work. */
388 real_length = length + 3;
389 }
390
391 col_append_fstr(pinfo->cinfo, COL_INFO,
392 "Port ID: %s ",
393 tvb_format_stringzpad(pinfo->pool, tvb, offset + 4,
394 length - 4));
395
396 if (tree) {
397 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb, offset,
398 real_length, ett_cdp_tlv, NULL, "Port ID: %s",
399 tvb_format_text(pinfo->pool, tvb, offset + 4, real_length - 4));
400 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
401 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
402 proto_tree_add_item(tlv_tree, hf_cdp_portid, tvb, offset + 4, real_length - 4, ENC_ASCII|ENC_NA);
403 }
404 offset += real_length;
405 break;
406
407 case TYPE_ADDRESS:
408 /* Addresses */
409 if (tree) {
410 tlv_tree = proto_tree_add_subtree(cdp_tree, tvb, offset,
411 length, ett_cdp_tlv, NULL, "Addresses");
412 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
413 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
414 }
415 offset += 4;
416 length -= 4;
417 naddresses = tvb_get_ntohl(tvb, offset);
418 proto_tree_add_item(tlv_tree, hf_cdp_number_of_addresses, tvb, offset, 4, ENC_BIG_ENDIAN);
419 offset += 4;
420 length -= 4;
421 while (naddresses != 0) {
422 addr_length = dissect_address_tlv(tvb, pinfo, offset, length,
423 tlv_tree);
424 if (addr_length < 0)
425 break;
426 offset += addr_length;
427 length -= addr_length;
428
429 naddresses--;
430 }
431 offset += length;
432 break;
433
434 case TYPE_CAPABILITIES:
435 if (tree) {
436 tlv_tree = proto_tree_add_subtree(cdp_tree, tvb, offset,
437 length, ett_cdp_tlv, NULL, "Capabilities");
438 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
439 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
440 }
441 offset += 4;
442 length -= 4;
443 dissect_capabilities(tvb, offset, length, tlv_tree);
444 offset += length;
445 break;
446
447 case TYPE_IOS_VERSION:
448 if (tree) {
449 tlv_tree = proto_tree_add_subtree(cdp_tree, tvb, offset,
450 length, ett_cdp_tlv, NULL, "Software Version");
451 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
452 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
453 add_multi_line_string_to_tree(tlv_tree, tvb, offset + 4,
454 length - 4, hf_cdp_software_version);
455 }
456 offset += length;
457 break;
458
459 case TYPE_PLATFORM:
460 /* ??? platform */
461 if (tree) {
462 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
463 offset, length, ett_cdp_tlv, NULL, "Platform: %s",
464 tvb_format_text(pinfo->pool, tvb, offset + 4, length - 4));
465 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
466 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
467 proto_tree_add_item(tlv_tree, hf_cdp_platform, tvb, offset + 4, length - 4, ENC_ASCII|ENC_NA);
468 }
469 offset += length;
470 break;
471
472 case TYPE_IP_PREFIX:
473 if (length == 8) {
474 /* if length is 8 then this is default gw not prefix */
475 if (tree) {
476 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb, offset,
477 length, ett_cdp_tlv, NULL, "ODR Default gateway: %s",
478 tvb_ip_to_str(pinfo->pool, tvb, offset+4));
479 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
480 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
481 proto_tree_add_item(tlv_tree, hf_cdp_odr_default_gateway, tvb, offset+4, 4, ENC_BIG_ENDIAN);
482 }
483 offset += 8;
484 } else {
485 if (tree) {
486 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb, offset,
487 length, ett_cdp_tlv, NULL, "IP Prefixes: %d",length/5);
488
489 /* the actual number of prefixes is (length-4)/5
490 but if the variable is not a "float" but "integer"
491 then length/5=(length-4)/5 :) */
492
493 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
494 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
495 }
496 offset += 4;
497 length -= 4;
498 while (length > 0) {
499 proto_tree_add_ipv4_format_value(tlv_tree, hf_cdp_ip_prefix, tvb, offset, 5, tvb_get_ntohl(tvb, offset),
500 "%s/%u", tvb_ip_to_str(pinfo->pool, tvb, offset), tvb_get_guint8(tvb,offset+4));
501 offset += 5;
502 length -= 5;
503 }
504 }
505 break;
506
507 case TYPE_PROTOCOL_HELLO:
508 if (tree) {
509 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
510 offset,length, ett_cdp_tlv, NULL, "Protocol Hello: %s",
511 val_to_str(tvb_get_ntohs(tvb, offset+7), type_hello_vals, "Unknown (0x%04x)"));
512 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
513 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
514 proto_tree_add_item(tlv_tree, hf_cdp_oui, tvb, offset+4, 3, ENC_BIG_ENDIAN);
515 proto_tree_add_item(tlv_tree, hf_cdp_protocol_id, tvb, offset+7, 2, ENC_BIG_ENDIAN);
516
517 switch(tvb_get_ntohs(tvb, offset+7)) {
518
519 case TYPE_HELLO_CLUSTER_MGMT:
520 proto_tree_add_item(tlv_tree, hf_cdp_cluster_master_ip, tvb, offset+9, 4, ENC_BIG_ENDIAN);
521 proto_tree_add_item(tlv_tree, hf_cdp_cluster_ip, tvb, offset+13, 4, ENC_BIG_ENDIAN);
522 proto_tree_add_item(tlv_tree, hf_cdp_cluster_version, tvb, offset+17, 1, ENC_BIG_ENDIAN);
523 proto_tree_add_item(tlv_tree, hf_cdp_cluster_sub_version, tvb, offset+18, 1, ENC_BIG_ENDIAN);
524 proto_tree_add_item(tlv_tree, hf_cdp_cluster_status, tvb, offset+19, 1, ENC_BIG_ENDIAN);
525 proto_tree_add_item(tlv_tree, hf_cdp_cluster_unknown, tvb, offset+20, 1, ENC_BIG_ENDIAN);
526 proto_tree_add_item(tlv_tree, hf_cdp_cluster_commander_mac, tvb, offset+21, 6, ENC_NA);
527 proto_tree_add_item(tlv_tree, hf_cdp_cluster_switch_mac, tvb, offset+27, 6, ENC_NA);
528 proto_tree_add_item(tlv_tree, hf_cdp_cluster_unknown, tvb, offset+33, 1, ENC_BIG_ENDIAN);
529 proto_tree_add_item(tlv_tree, hf_cdp_cluster_management_vlan, tvb, offset+34, 2, ENC_BIG_ENDIAN);
530 break;
531 default:
532 proto_tree_add_item(tlv_tree, hf_cdp_hello_unknown, tvb, offset + 9, length - 9, ENC_NA);
533 break;
534 }
535 }
536 offset += length;
537 break;
538
539 case TYPE_VTP_MGMT_DOMAIN:
540 if (tree) {
541 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
542 offset, length, ett_cdp_tlv, NULL, "VTP Management Domain: %s",
543 tvb_format_text(pinfo->pool, tvb, offset + 4, length - 4));
544 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
545 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
546 proto_tree_add_item(tlv_tree, hf_cdp_vtp_management_domain, tvb, offset + 4, length - 4, ENC_NA|ENC_ASCII);
547 }
548 offset += length;
549 break;
550
551 case TYPE_NATIVE_VLAN:
552 if (tree) {
553 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
554 offset, length, ett_cdp_tlv, NULL, "Native VLAN: %u",
555 tvb_get_ntohs(tvb, offset + 4));
556 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
557 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
558 proto_tree_add_item(tlv_tree, hf_cdp_native_vlan, tvb, offset + 4, 2, ENC_BIG_ENDIAN);
559 }
560 offset += length;
561 break;
562
563 case TYPE_DUPLEX:
564 if (tree) {
565 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
566 offset, length, ett_cdp_tlv, NULL, "Duplex: %s",
567 tvb_get_guint8(tvb, offset + 4) ?
568 "Full" : "Half" );
569 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
570 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
571 proto_tree_add_item(tlv_tree, hf_cdp_duplex, tvb, offset + 4, 1, ENC_NA);
572 }
573 offset += length;
574 break;
575
576 case TYPE_VOIP_VLAN_REPLY:
577 tlvi = NULL;
578 if (tree) {
579 guint32 vlan_id;
580
581 tlv_tree = proto_tree_add_subtree(cdp_tree, tvb,
582 offset, length, ett_cdp_tlv, &tlvi,
583 "VoIP VLAN Reply");
584 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
585 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
586 if (length == 6) {
587 /*
588 * XXX - this doesn't appear to happen, so report it
589 * as an error.
590 */
591 proto_tree_add_item(tlv_tree, hf_cdp_data, tvb, offset + 4, 2, ENC_NA);
592 } else {
593 /*
594 * XXX - the first byte appears to be a 1-byte
595 * "appliance type" code.
596 */
597 proto_tree_add_item(tlv_tree, hf_cdp_data, tvb, offset + 4, 1, ENC_NA);
598 proto_tree_add_item_ret_uint(tlv_tree, hf_cdp_voice_vlan, tvb, offset + 5, 2, ENC_BIG_ENDIAN, &vlan_id);
599 proto_item_append_text(tlvi, ": VLAN %u", vlan_id);
600 }
601 }
602 offset += length;
603 break;
604
605 case TYPE_VOIP_VLAN_QUERY:
606 tlvi = NULL;
607 if (tree) {
608 guint32 vlan_id;
609
610 tlv_tree = proto_tree_add_subtree(cdp_tree, tvb,
611 offset, length, ett_cdp_tlv, &tlvi,
612 "VoIP VLAN Query");
613 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
614 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
615 if (length == 6) {
616 /*
617 * This is some unknown value; it's typically 0x20 0x00,
618 * which, as a big-endian value, is not a VLAN ID, as
619 * VLAN IDs are 12 bits long.
620 */
621 proto_tree_add_item(tlv_tree, hf_cdp_data, tvb, offset + 4, 2, ENC_NA);
622 } else {
623 /*
624 * XXX - is this a 1-byte "appliance type" code?
625 */
626 proto_tree_add_item(tlv_tree, hf_cdp_data, tvb, offset + 4, 1, ENC_NA);
627 proto_tree_add_item_ret_uint(tlv_tree, hf_cdp_voice_vlan, tvb, offset + 5, 2, ENC_BIG_ENDIAN, &vlan_id);
628 proto_item_append_text(tlvi, ": VLAN %u", vlan_id);
629 }
630 }
631 offset += length;
632 break;
633
634 case TYPE_POWER:
635 if (tree) {
636 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
637 offset, length, ett_cdp_tlv, NULL, "Power Consumption: %u mW",
638 tvb_get_ntohs(tvb, offset + 4));
639 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
640 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
641 proto_tree_add_item(tlv_tree, hf_cdp_power_consumption, tvb, offset + 4, 2, ENC_BIG_ENDIAN);
642 }
643 offset += length;
644 break;
645
646 case TYPE_MTU:
647 if (tree) {
648 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
649 offset, length, ett_cdp_tlv, NULL, "MTU: %u",
650 tvb_get_ntohl(tvb,offset + 4));
651 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
652 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
653 proto_tree_add_item(tlv_tree, hf_cdp_mtu, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
654 }
655 offset += length;
656 break;
657
658 case TYPE_TRUST_BITMAP:
659 if (tree) {
660 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
661 offset, length, ett_cdp_tlv, NULL, "Trust Bitmap: 0x%02X",
662 tvb_get_guint8(tvb, offset + 4));
663 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
664 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
665 proto_tree_add_item(tlv_tree, hf_cdp_trust_bitmap, tvb, offset + 4, 1, ENC_BIG_ENDIAN);
666 }
667 offset += length;
668 break;
669
670 case TYPE_UNTRUSTED_COS:
671 if (tree) {
672 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
673 offset, length, ett_cdp_tlv, NULL, "Untrusted port CoS: 0x%02X",
674 tvb_get_guint8(tvb, offset + 4));
675 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
676 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
677 proto_tree_add_item(tlv_tree, hf_cdp_untrusted_port_cos, tvb, offset + 4, 1, ENC_BIG_ENDIAN);
678 }
679 offset += length;
680 break;
681
682 case TYPE_SYSTEM_NAME:
683 if (tree) {
684 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
685 offset, length, ett_cdp_tlv, NULL, "System Name: %s",
686 tvb_format_text(pinfo->pool, tvb, offset + 4, length - 4));
687 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
688 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
689 proto_tree_add_item(tlv_tree, hf_cdp_system_name, tvb, offset + 4, length - 4, ENC_NA|ENC_ASCII);
690 }
691 offset += length;
692 break;
693
694 case TYPE_SYSTEM_OID:
695 if (tree) {
696 tlv_tree = proto_tree_add_subtree(cdp_tree, tvb,
697 offset, length, ett_cdp_tlv, NULL, "System Object Identifier");
698 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
699 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
700 proto_tree_add_item(tlv_tree, hf_cdp_system_object_identifier, tvb, offset + 4, length - 4, ENC_NA);
701 }
702 offset += length;
703 break;
704
705 case TYPE_MANAGEMENT_ADDR:
706 if (tree) {
707 tlv_tree = proto_tree_add_subtree(cdp_tree, tvb,
708 offset, length, ett_cdp_tlv, NULL, "Management Addresses");
709 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
710 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
711 }
712 offset += 4;
713 length -= 4;
714 naddresses = tvb_get_ntohl(tvb, offset);
715 if (tree) {
716 proto_tree_add_item(tlv_tree, hf_cdp_number_of_addresses, tvb, offset, 4, ENC_BIG_ENDIAN);
717 }
718 offset += 4;
719 length -= 4;
720 while (naddresses != 0) {
721 addr_length = dissect_address_tlv(tvb, pinfo, offset, length,
722 tlv_tree);
723 if (addr_length < 0)
724 break;
725 offset += addr_length;
726 length -= addr_length;
727
728 naddresses--;
729 }
730 offset += length;
731 break;
732
733 case TYPE_LOCATION:
734 if (tree) {
735 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
736 offset, length, ett_cdp_tlv, NULL, "Location: %s",
737 tvb_format_text(pinfo->pool, tvb, offset + 5, length - 5));
738 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
739 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
740 proto_tree_add_item(tlv_tree, hf_cdp_location_unknown, tvb, offset + 4, 1, ENC_BIG_ENDIAN);
741 proto_tree_add_item(tlv_tree, hf_cdp_location, tvb, offset + 5, length - 5, ENC_NA|ENC_ASCII);
742 }
743 offset += length;
744 break;
745
746 case TYPE_POWER_REQUESTED:
747 tlvi = NULL;
748 if (tree) {
749 tlv_tree = proto_tree_add_subtree(cdp_tree, tvb,
750 offset, length, ett_cdp_tlv, &tlvi,
751 "Power Request");
752 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
753 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
754 proto_tree_add_item(tlv_tree, hf_cdp_request_id, tvb, offset + 4, 2, ENC_BIG_ENDIAN);
755 proto_tree_add_item(tlv_tree, hf_cdp_management_id, tvb, offset + 6, 2, ENC_BIG_ENDIAN);
756 }
757 power_req_len = tvb_get_ntohs(tvb, offset + TLV_LENGTH);
758 if (power_req_len < 8) {
759 offset += power_req_len;
760 break;
761 }
762 power_req_len -= 8;
763 /* Move offset to where the list of Power Request Values Exist */
764 offset += 8;
765 first = TRUE;
766 while (power_req_len >= 4) {
767 proto_tree_add_item_ret_uint(tlv_tree, hf_cdp_power_requested, tvb, offset, 4, ENC_BIG_ENDIAN, &power_req);
768 if (first) {
769 proto_item_append_text(tlvi, ": %u mW", power_req);
770 first = FALSE;
771 } else
772 proto_item_append_text(tlvi, ", %u mW", power_req);
773 power_req_len -= 4;
774 offset += 4;
775 }
776 offset += power_req_len;
777 break;
778
779 case TYPE_POWER_AVAILABLE:
780 tlvi = NULL;
781 if (tree) {
782 tlv_tree = proto_tree_add_subtree(cdp_tree, tvb,
783 offset, length, ett_cdp_tlv, &tlvi,
784 "Power Available");
785 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
786 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
787 proto_tree_add_item(tlv_tree, hf_cdp_request_id, tvb, offset + 4, 2, ENC_BIG_ENDIAN);
788 proto_tree_add_item(tlv_tree, hf_cdp_management_id, tvb, offset + 6, 2, ENC_BIG_ENDIAN);
789 }
790 power_avail_len = tvb_get_ntohs(tvb, offset + TLV_LENGTH);
791 if (power_avail_len < 8) {
792 offset += power_avail_len;
793 break;
794 }
795 power_avail_len -= 8;
796 /* Move offset to where the list of Power Available Values Exist */
797 offset += 8;
798 first = TRUE;
799 while (power_avail_len >= 4) {
800 proto_tree_add_item_ret_uint(tlv_tree, hf_cdp_power_available, tvb, offset, 4, ENC_BIG_ENDIAN, &power_avail);
801 if (first) {
802 proto_item_append_text(tlvi, ": %u mW", power_avail);
803 first = FALSE;
804 } else
805 proto_item_append_text(tlvi, ", %u mW", power_avail);
806 power_avail_len -= 4;
807 offset += 4;
808 }
809 offset += power_avail_len;
810 break;
811
812 case TYPE_NRGYZ:
813 if (tree) {
814 tlv_tree = proto_tree_add_subtree(cdp_tree, tvb,
815 offset, length, ett_cdp_tlv, NULL, "EnergyWise");
816 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
817 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
818 proto_tree_add_item(tlv_tree, hf_cdp_encrypted_data, tvb, offset + 4, 20, ENC_NA);
819 proto_tree_add_item(tlv_tree, hf_cdp_seen_sequence, tvb, offset + 24, 4, ENC_BIG_ENDIAN);
820 proto_tree_add_item(tlv_tree, hf_cdp_sequence_number, tvb, offset + 28, 4, ENC_BIG_ENDIAN);
821 proto_tree_add_item(tlv_tree, hf_cdp_model_number, tvb, offset + 32, 16, ENC_NA|ENC_ASCII);
822 proto_tree_add_item(tlv_tree, hf_cdp_unknown_pad, tvb, offset + 48, 2, ENC_BIG_ENDIAN);
823 proto_tree_add_item(tlv_tree, hf_cdp_hardware_version_id, tvb, offset + 50, 3, ENC_NA|ENC_ASCII);
824 proto_tree_add_item(tlv_tree, hf_cdp_system_serial_number, tvb, offset + 53, 11, ENC_NA|ENC_ASCII);
825 proto_tree_add_item(tlv_tree, hf_cdp_nrgyz_unknown_values, tvb, offset + 64, 8, ENC_NA);
826 proto_tree_add_item(tlv_tree, hf_cdp_len_tlv_table, tvb, offset + 72, 2, ENC_BIG_ENDIAN);
827 proto_tree_add_item(tlv_tree, hf_cdp_num_tlvs_table, tvb, offset + 74, 2, ENC_BIG_ENDIAN);
828
829 dissect_nrgyz_tlv(tvb, pinfo, offset + 76,
830 tvb_get_ntohs(tvb, offset + 72),
831 tvb_get_ntohs(tvb, offset + 74),
832 tlv_tree);
833
834
835 }
836 offset += length;
837 break;
838
839 case TYPE_SPARE_POE:
840 if (tree) {
841 tlv_tree = proto_tree_add_subtree(cdp_tree, tvb, offset, length,
842 ett_cdp_tlv, NULL, "Spare Pair PoE");
843
844 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
845 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
846 }
847 offset += 4;
848 length -= 4;
849 dissect_spare_poe_tlv(tvb, offset, length, tlv_tree);
850 offset += length;
851 break;
852
853 case TYPE_HP_BSSID:
854 /* BSSID */
855 if (tree) {
856 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
857 offset, length, ett_cdp_tlv, NULL, "BSSID: %s",
858 tvb_format_text(pinfo->pool, tvb, offset + 4, length - 4));
859 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
860 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
861 proto_tree_add_item(tlv_tree, hf_cdp_platform, tvb, offset + 4, length - 4, ENC_ASCII|ENC_NA);
862 }
863 offset += length;
864 break;
865
866 case TYPE_HP_SERIAL:
867 /* Serial number */
868 if (tree) {
869 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
870 offset, length, ett_cdp_tlv, NULL, "Serial: %s",
871 tvb_format_text(pinfo->pool, tvb, offset + 4, length - 4));
872 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
873 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
874 proto_tree_add_item(tlv_tree, hf_cdp_platform, tvb, offset + 4, length - 4, ENC_ASCII|ENC_NA);
875 }
876 offset += length;
877 break;
878
879 case TYPE_HP_SSID:
880 /* SSID */
881 if (tree) {
882 if (length == 4) {
883 tlv_tree = proto_tree_add_subtree(cdp_tree, tvb,
884 offset, length, ett_cdp_tlv, NULL, "SSID: [Empty]");
885 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
886 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
887 } else {
888 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
889 offset, length, ett_cdp_tlv, NULL, "SSID: %s",
890 tvb_format_text(pinfo->pool, tvb, offset + 4, length - 4));
891 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
892 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
893 proto_tree_add_item(tlv_tree, hf_cdp_platform, tvb, offset + 4, length - 4, ENC_ASCII|ENC_NA);
894 }
895 }
896 offset += length;
897 break;
898
899 case TYPE_HP_RADIO1_CH:
900 /* Radio1 channel */
901 if (tree) {
902 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
903 offset, length, ett_cdp_tlv, NULL, "Radio 1 channel: %s",
904 tvb_format_text(pinfo->pool, tvb, offset + 4, length - 4));
905 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
906 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
907 proto_tree_add_item(tlv_tree, hf_cdp_platform, tvb, offset + 4, length - 4, ENC_ASCII|ENC_NA);
908 }
909 offset += length;
910 break;
911
912 case TYPE_HP_SNMP_PORT:
913 /* SNMP listening UDP port */
914 if (tree) {
915 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
916 offset, length, ett_cdp_tlv, NULL, "SNMP port: %s",
917 tvb_format_text(pinfo->pool, tvb, offset + 4, length - 4));
918 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
919 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
920 proto_tree_add_item(tlv_tree, hf_cdp_platform, tvb, offset + 4, length - 4, ENC_ASCII|ENC_NA);
921 }
922 offset += length;
923 break;
924
925 case TYPE_HP_MGMT_PORT:
926 /* Web interface TCP port */
927 if (tree) {
928 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
929 offset, length, ett_cdp_tlv, NULL, "Web mgmt port: %s",
930 tvb_format_text(pinfo->pool, tvb, offset + 4, length - 4));
931 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
932 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
933 proto_tree_add_item(tlv_tree, hf_cdp_platform, tvb, offset + 4, length - 4, ENC_ASCII|ENC_NA);
934 }
935 offset += length;
936 break;
937
938 case TYPE_HP_SOURCE_MAC:
939 /* Sender MAC address for the AP, bouth wired and wireless */
940 if (tree) {
941 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
942 offset, length, ett_cdp_tlv, NULL, "Source MAC: %s",
943 tvb_format_text(pinfo->pool, tvb, offset + 4, length - 4));
944 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
945 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
946 proto_tree_add_item(tlv_tree, hf_cdp_platform, tvb, offset + 4, length - 4, ENC_ASCII|ENC_NA);
947 }
948 offset += length;
949 break;
950
951 case TYPE_HP_RADIO2_CH:
952 /* Radio2 channel */
953 if (tree) {
954 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
955 offset, length, ett_cdp_tlv, NULL, "Radio 2 channel: %s",
956 tvb_format_text(pinfo->pool, tvb, offset + 4, length - 4));
957 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
958 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
959 proto_tree_add_item(tlv_tree, hf_cdp_platform, tvb, offset + 4, length - 4, ENC_ASCII|ENC_NA);
960 }
961 offset += length;
962 break;
963
964 case TYPE_HP_RADIO1_OMODE:
965 /* Radio1 Operating mode */
966 if (tree) {
967 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
968 offset, length, ett_cdp_tlv, NULL, "Radio 1 operating mode: %s",
969 tvb_format_text(pinfo->pool, tvb, offset + 4, length - 4));
970 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
971 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
972 proto_tree_add_item(tlv_tree, hf_cdp_platform, tvb, offset + 4, length - 4, ENC_ASCII|ENC_NA);
973 }
974 offset += length;
975 break;
976
977 case TYPE_HP_RADIO2_OMODE:
978 /* Radio2 Operating mode */
979 if (tree) {
980 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
981 offset, length, ett_cdp_tlv, NULL, "Radio 2 operating mode: %s",
982 tvb_format_text(pinfo->pool, tvb, offset + 4, length - 4));
983 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
984 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
985 proto_tree_add_item(tlv_tree, hf_cdp_platform, tvb, offset + 4, length - 4, ENC_ASCII|ENC_NA);
986 }
987 offset += length;
988 break;
989
990 case TYPE_HP_RADIO1_RMODE:
991 /* Radio1 Radio mode */
992 if (tree) {
993 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
994 offset, length, ett_cdp_tlv, NULL, "Radio 1 radio mode: %s",
995 tvb_format_text(pinfo->pool, tvb, offset + 4, length - 4));
996 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
997 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
998 proto_tree_add_item(tlv_tree, hf_cdp_platform, tvb, offset + 4, length - 4, ENC_ASCII|ENC_NA);
999 }
1000 offset += length;
1001 break;
1002
1003 case TYPE_HP_RADIO2_RMODE:
1004 /* Radio2 Radio mode */
1005 if (tree) {
1006 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb,
1007 offset, length, ett_cdp_tlv, NULL, "Radio 2 radio mode: %s",
1008 tvb_format_text(pinfo->pool, tvb, offset + 4, length - 4));
1009 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
1010 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
1011 proto_tree_add_item(tlv_tree, hf_cdp_platform, tvb, offset + 4, length - 4, ENC_ASCII|ENC_NA);
1012 }
1013 offset += length;
1014 break;
1015
1016 default:
1017 if (tree) {
1018 tlv_tree = proto_tree_add_subtree_format(cdp_tree, tvb, offset,
1019 length, ett_cdp_tlv, NULL, "Type: %s, length: %u",
1020 val_to_str(type, type_vals, "Unknown (0x%04x)"),
1021 length);
1022 proto_tree_add_item(tlv_tree, hf_cdp_tlvtype, tvb, offset + TLV_TYPE, 2, ENC_BIG_ENDIAN);
1023 proto_tree_add_item(tlv_tree, hf_cdp_tlvlength, tvb, offset + TLV_LENGTH, 2, ENC_BIG_ENDIAN);
1024 if (length > 4) {
1025 proto_tree_add_item(tlv_tree, hf_cdp_data, tvb, offset + 4, length - 4, ENC_NA);
1026 } else {
1027 return tvb_captured_length(tvb);
1028 }
1029 }
1030 offset += length;
1031 }
1032 }
1033 call_data_dissector(tvb_new_subset_remaining(tvb, offset), pinfo, cdp_tree);
1034 return tvb_captured_length(tvb);
1035 }
1036
1037 #define PROTO_TYPE_NLPID 1
1038 #define PROTO_TYPE_IEEE_802_2 2
1039
1040 static const value_string proto_type_vals[] = {
1041 { PROTO_TYPE_NLPID, "NLPID" },
1042 { PROTO_TYPE_IEEE_802_2, "802.2" },
1043 { 0, NULL }
1044 };
1045
1046 static int
dissect_address_tlv(tvbuff_t * tvb,packet_info * pinfo,int offset,int length,proto_tree * tree)1047 dissect_address_tlv(tvbuff_t *tvb, packet_info* pinfo, int offset, int length, proto_tree *tree)
1048 {
1049 proto_item *ti;
1050 proto_tree *address_tree;
1051 guint8 protocol_type;
1052 guint8 protocol_length;
1053 int nlpid = 0;
1054 guint16 address_length;
1055 guint16 etypeid = 0;
1056 int hf_addr = -1;
1057
1058 if (length < 1)
1059 return -1;
1060 address_tree = proto_tree_add_subtree(tree, tvb, offset, length, ett_cdp_address, &ti, "Truncated address");
1061 protocol_type = tvb_get_guint8(tvb, offset);
1062 proto_tree_add_item(address_tree, hf_cdp_protocol_type, tvb, offset, 1, ENC_BIG_ENDIAN);
1063 offset += 1;
1064 length -= 1;
1065
1066 if (length < 1)
1067 return -1;
1068 protocol_length = tvb_get_guint8(tvb, offset);
1069 proto_tree_add_item(address_tree, hf_cdp_protocol_length, tvb, offset, 1, ENC_BIG_ENDIAN);
1070 offset += 1;
1071 length -= 1;
1072
1073 if (length < protocol_length) {
1074 if (length != 0) {
1075 ti = proto_tree_add_item(address_tree, hf_cdp_protocol, tvb, offset, length, ENC_NA);
1076 proto_item_append_text(ti, " (truncated)");
1077 }
1078 return -1;
1079 }
1080
1081 if ((protocol_type == PROTO_TYPE_NLPID) && (protocol_length == 1)) {
1082 nlpid = tvb_get_guint8(tvb, offset);
1083 proto_tree_add_bytes_format_value(address_tree, hf_cdp_protocol, tvb, offset, protocol_length, NULL, "%s",
1084 val_to_str(nlpid, nlpid_vals, "Unknown (0x%02x)"));
1085 } else if ((protocol_type == PROTO_TYPE_IEEE_802_2) && (protocol_length == 8) && (tvb_get_ntoh48(tvb, offset) == 0xAAAA03000000)) {
1086 etypeid = tvb_get_ntohs(tvb, offset + 6);
1087 proto_tree_add_bytes_format_value(address_tree, hf_cdp_protocol, tvb, offset, protocol_length, NULL, "%s",
1088 val_to_str(etypeid, etype_vals, "Unknown (0x%04x)"));
1089 } else {
1090 nlpid = -1;
1091 proto_tree_add_item(address_tree, hf_cdp_protocol, tvb, offset, protocol_length, ENC_NA);
1092 }
1093 offset += protocol_length;
1094 length -= protocol_length;
1095
1096 if (length < 2)
1097 return -1;
1098 address_length = tvb_get_ntohs(tvb, offset);
1099 proto_tree_add_item(address_tree, hf_cdp_address_length, tvb, offset, 2, ENC_BIG_ENDIAN);
1100 offset += 2;
1101 length -= 2;
1102
1103 if (length < address_length) {
1104 if (length != 0) {
1105 ti = proto_tree_add_item(address_tree, hf_cdp_address, tvb, offset, length, ENC_NA);
1106 proto_item_append_text(ti, " (truncated)");
1107 }
1108 return -1;
1109 }
1110 /* XXX - the Cisco document seems to be saying that, for 802.2-format
1111 protocol types, 0xAAAA03 0x000000 0x0800 is IPv6, but 0x0800 is
1112 the Ethernet protocol type for IPv4. */
1113 if ((protocol_type == PROTO_TYPE_NLPID) && (protocol_length == 1)) {
1114 switch (nlpid) {
1115
1116 /* XXX - dissect NLPID_ISO8473_CLNP as OSI CLNP address? */
1117
1118 case NLPID_IP:
1119 if (address_length == 4) {
1120 /* The address is an IP address. */
1121 proto_item_set_text(ti, "IP address: %s", tvb_ip_to_str(pinfo->pool, tvb, offset));
1122 hf_addr = hf_cdp_nrgyz_ip_address;
1123 proto_tree_add_item(address_tree, hf_cdp_nrgyz_ip_address, tvb, offset, address_length, ENC_BIG_ENDIAN);
1124 }
1125 break;
1126 }
1127 }
1128 if ((protocol_type == PROTO_TYPE_IEEE_802_2) && (protocol_length == 8) && (etypeid > 0)) {
1129 /*
1130 * See also:
1131 *
1132 * http://www.rhyshaden.com/cdp.htm
1133 *
1134 * where other Ethertypes are mentioned.
1135 */
1136 switch (etypeid) {
1137
1138 case ETHERTYPE_IPv6:
1139 if (address_length == 16) {
1140 /* The address is an IPv6 address. */
1141 proto_item_set_text(ti, "IPv6 address: %s", tvb_ip6_to_str(pinfo->pool, tvb, offset));
1142 hf_addr = hf_cdp_nrgyz_ip6_address;
1143 proto_tree_add_item(address_tree, hf_cdp_nrgyz_ip6_address, tvb, offset, address_length, ENC_NA);
1144 }
1145 break;
1146 }
1147 }
1148
1149 if (hf_addr == -1)
1150 {
1151 proto_tree_add_item(address_tree, hf_cdp_address, tvb, offset, address_length, ENC_NA);
1152 proto_item_set_text(ti, "Address: %s", tvb_bytes_to_str(pinfo->pool, tvb, offset, address_length));
1153 }
1154
1155 return 2 + protocol_length + 2 + address_length;
1156 }
1157
1158 static void
dissect_capabilities(tvbuff_t * tvb,int offset,int length,proto_tree * tree)1159 dissect_capabilities(tvbuff_t *tvb, int offset, int length, proto_tree *tree)
1160 {
1161 proto_item *ti;
1162 proto_tree *capabilities_tree;
1163
1164 if (length < 4)
1165 return;
1166 ti = proto_tree_add_item(tree, hf_cdp_capabilities, tvb, offset, 4, ENC_BIG_ENDIAN);
1167 capabilities_tree = proto_item_add_subtree(ti, ett_cdp_capabilities);
1168 proto_tree_add_item(capabilities_tree, hf_cdp_capabilities_router, tvb, offset, 4, ENC_BIG_ENDIAN);
1169 proto_tree_add_item(capabilities_tree, hf_cdp_capabilities_trans_bridge, tvb, offset, 4, ENC_BIG_ENDIAN);
1170 proto_tree_add_item(capabilities_tree, hf_cdp_capabilities_src_bridge, tvb, offset, 4, ENC_BIG_ENDIAN);
1171 proto_tree_add_item(capabilities_tree, hf_cdp_capabilities_switch, tvb, offset, 4, ENC_BIG_ENDIAN);
1172 proto_tree_add_item(capabilities_tree, hf_cdp_capabilities_host, tvb, offset, 4, ENC_BIG_ENDIAN);
1173 proto_tree_add_item(capabilities_tree, hf_cdp_capabilities_igmp_capable, tvb, offset, 4, ENC_BIG_ENDIAN);
1174 proto_tree_add_item(capabilities_tree, hf_cdp_capabilities_repeater, tvb, offset, 4, ENC_BIG_ENDIAN);
1175 proto_tree_add_item(capabilities_tree, hf_cdp_capabilities_voip_phone , tvb, offset, 4, ENC_BIG_ENDIAN);
1176 proto_tree_add_item(capabilities_tree, hf_cdp_capabilities_remote, tvb, offset, 4, ENC_BIG_ENDIAN);
1177 proto_tree_add_item(capabilities_tree, hf_cdp_capabilities_cvta, tvb, offset, 4, ENC_BIG_ENDIAN);
1178 proto_tree_add_item(capabilities_tree, hf_cdp_capabilities_mac_relay, tvb, offset, 4, ENC_BIG_ENDIAN);
1179 }
1180
1181 static void
dissect_nrgyz_tlv(tvbuff_t * tvb,packet_info * pinfo,int offset,guint16 length,guint16 num,proto_tree * tree)1182 dissect_nrgyz_tlv(tvbuff_t *tvb, packet_info* pinfo, int offset, guint16 length, guint16 num,
1183 proto_tree *tree)
1184 {
1185 guint32 tlvt, tlvl;
1186 proto_tree *etree = NULL;
1187 char const *ttext = NULL;
1188
1189 while (num-- && (length >= 8)) {
1190 tlvt = tvb_get_ntohl(tvb, offset);
1191 tlvl = tvb_get_ntohl(tvb, offset + 4);
1192
1193 if (length < tlvl)
1194 break;
1195 length -= tlvl;
1196
1197 if (tlvl < 8) {
1198 proto_tree_add_expert_format(tree, pinfo, &ei_cdp_nrgyz_tlvlength, tvb, offset, 8, "TLV with invalid length %u (< 8)", tlvl);
1199 offset += 8;
1200 break;
1201 }
1202 else {
1203 ttext = val_to_str(tlvt, type_nrgyz_vals, "Unknown (0x%04x)");
1204 switch (tlvt) {
1205 case TYPE_NRGYZ_ROLE:
1206 case TYPE_NRGYZ_DOMAIN:
1207 case TYPE_NRGYZ_NAME:
1208 etree = proto_tree_add_subtree_format(tree, tvb, offset,
1209 tlvl, ett_cdp_nrgyz_tlv, NULL, "EnergyWise %s: %s", ttext,
1210 tvb_format_stringzpad(pinfo->pool, tvb, offset + 8, tlvl - 8)
1211 );
1212 break;
1213 case TYPE_NRGYZ_REPLYTO:
1214 etree = proto_tree_add_subtree_format(tree, tvb, offset,
1215 tlvl, ett_cdp_nrgyz_tlv, NULL, "EnergyWise %s: %s port %u",
1216 ttext,
1217 tvb_ip_to_str(pinfo->pool, tvb, offset + 12),
1218 tvb_get_ntohs(tvb, offset + 10)
1219 );
1220 break;
1221 default:
1222 etree = proto_tree_add_subtree_format(tree, tvb, offset,
1223 tlvl, ett_cdp_nrgyz_tlv, NULL, "EnergyWise %s TLV", ttext);
1224 }
1225 proto_tree_add_item(etree, hf_cdp_nrgyz_tlvtype, tvb, offset, 4, ENC_BIG_ENDIAN);
1226 proto_tree_add_item(etree, hf_cdp_nrgyz_tlvlength, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
1227 switch (tlvt) {
1228 case TYPE_NRGYZ_ROLE:
1229 proto_tree_add_item(etree, hf_cdp_nrgyz_reply_to_role, tvb, offset + 8, tlvl - 8, ENC_NA|ENC_ASCII);
1230 break;
1231 case TYPE_NRGYZ_DOMAIN:
1232 proto_tree_add_item(etree, hf_cdp_nrgyz_reply_to_domain, tvb, offset + 8, tlvl - 8, ENC_NA|ENC_ASCII);
1233 break;
1234 case TYPE_NRGYZ_NAME:
1235 proto_tree_add_item(etree, hf_cdp_nrgyz_reply_to_name, tvb, offset + 8, tlvl - 8, ENC_NA|ENC_ASCII);
1236 break;
1237 case TYPE_NRGYZ_REPLYTO:
1238 proto_tree_add_item(etree, hf_cdp_nrgyz_reply_to_unknown_field, tvb, offset + 8, 2, ENC_BIG_ENDIAN);
1239 proto_tree_add_item(etree, hf_cdp_nrgyz_reply_to_port, tvb, offset + 10, 2, ENC_BIG_ENDIAN);
1240 proto_tree_add_item(etree, hf_cdp_nrgyz_reply_to_ip_address, tvb, offset + 12, 4, ENC_BIG_ENDIAN);
1241 proto_tree_add_item(etree, hf_cdp_nrgyz_reply_to_backup_server_port, tvb, offset + 16, 2, ENC_BIG_ENDIAN);
1242 proto_tree_add_item(etree, hf_cdp_nrgyz_reply_to_backup_server_ip, tvb, offset + 18, 4, ENC_BIG_ENDIAN);
1243 break;
1244 default:
1245 if (tlvl > 8) {
1246 proto_tree_add_item(etree, hf_cdp_data, tvb, offset + 8, tlvl - 8, ENC_NA);
1247 }
1248 }
1249 offset += tlvl;
1250 }
1251 }
1252 if (length) {
1253 proto_tree_add_expert(tree, pinfo, &ei_cdp_invalid_data, tvb, offset, length);
1254 }
1255 }
1256
1257 static void
dissect_spare_poe_tlv(tvbuff_t * tvb,int offset,int length,proto_tree * tree)1258 dissect_spare_poe_tlv(tvbuff_t *tvb, int offset, int length,
1259 proto_tree *tree)
1260 {
1261 proto_item *ti;
1262 proto_tree *tlv_tree;
1263
1264 if (length == 0) {
1265 return;
1266 }
1267
1268 ti = proto_tree_add_item(tree, hf_cdp_spare_poe_tlv, tvb, offset, 1, ENC_BIG_ENDIAN);
1269 tlv_tree = proto_item_add_subtree(ti, ett_cdp_spare_poe_tlv);
1270 proto_tree_add_item(tlv_tree, hf_cdp_spare_poe_tlv_poe, tvb, offset, 1, ENC_BIG_ENDIAN);
1271 proto_tree_add_item(tlv_tree, hf_cdp_spare_poe_tlv_spare_pair_arch, tvb, offset, 1, ENC_BIG_ENDIAN);
1272 proto_tree_add_item(tlv_tree, hf_cdp_spare_poe_tlv_req_spare_pair_poe, tvb, offset, 1, ENC_BIG_ENDIAN);
1273 proto_tree_add_item(tlv_tree, hf_cdp_spare_poe_tlv_pse_spare_pair_poe, tvb, offset, 1, ENC_BIG_ENDIAN);
1274 }
1275
1276 static void
add_multi_line_string_to_tree(proto_tree * tree,tvbuff_t * tvb,gint start,gint len,int hf)1277 add_multi_line_string_to_tree(proto_tree *tree, tvbuff_t *tvb, gint start,
1278 gint len, int hf)
1279 {
1280 gint next;
1281 int line_len;
1282 int data_len;
1283
1284 while (len > 0) {
1285 line_len = tvb_find_line_end(tvb, start, len, &next, FALSE);
1286 data_len = next - start;
1287 proto_tree_add_string(tree, hf, tvb, start, data_len, tvb_format_stringzpad(wmem_packet_scope(), tvb, start, line_len));
1288 start += data_len;
1289 len -= data_len;
1290 }
1291 }
1292
1293 void
proto_register_cdp(void)1294 proto_register_cdp(void)
1295 {
1296 static hf_register_info hf[] = {
1297 { &hf_cdp_version,
1298 { "Version", "cdp.version", FT_UINT8, BASE_DEC, NULL, 0x0,
1299 NULL, HFILL }},
1300
1301 { &hf_cdp_ttl,
1302 { "TTL", "cdp.ttl", FT_UINT8, BASE_DEC|BASE_UNIT_STRING, &units_second_seconds, 0x0,
1303 NULL, HFILL }},
1304
1305 { &hf_cdp_checksum,
1306 { "Checksum", "cdp.checksum", FT_UINT16, BASE_HEX, NULL, 0x0,
1307 NULL, HFILL }},
1308
1309 { &hf_cdp_checksum_status,
1310 { "Checksum Status", "cdp.checksum.status", FT_UINT8, BASE_NONE, VALS(proto_checksum_vals), 0x0,
1311 NULL, HFILL }},
1312
1313 { &hf_cdp_tlvtype,
1314 { "Type", "cdp.tlv.type", FT_UINT16, BASE_HEX, VALS(type_vals), 0x0,
1315 NULL, HFILL }},
1316
1317 { &hf_cdp_tlvlength,
1318 { "Length", "cdp.tlv.len", FT_UINT16, BASE_DEC, NULL, 0x0,
1319 NULL, HFILL }},
1320
1321 { &hf_cdp_nrgyz_tlvtype,
1322 { "TLV Type", "cdp.nrgyz.tlv.type", FT_UINT32, BASE_HEX, VALS(type_nrgyz_vals), 0x0,
1323 NULL, HFILL }},
1324
1325 { &hf_cdp_nrgyz_tlvlength,
1326 { "TLV Length", "cdp.nrgyz.tlv.len", FT_UINT16, BASE_DEC, NULL, 0x0,
1327 NULL, HFILL }},
1328
1329 { &hf_cdp_deviceid,
1330 {"Device ID", "cdp.deviceid", FT_STRING, BASE_NONE,
1331 NULL, 0, NULL, HFILL }},
1332
1333 { &hf_cdp_platform,
1334 {"Platform", "cdp.platform", FT_STRING, BASE_NONE,
1335 NULL, 0, NULL, HFILL }},
1336
1337 { &hf_cdp_portid,
1338 {"Sent through Interface", "cdp.portid", FT_STRING, BASE_NONE,
1339 NULL, 0, NULL, HFILL }},
1340
1341 { &hf_cdp_capabilities,
1342 {"Capabilities", "cdp.capabilities", FT_UINT32, BASE_HEX,
1343 NULL, 0, NULL, HFILL }},
1344
1345 { &hf_cdp_capabilities_router,
1346 {"Router", "cdp.capabilities.router", FT_BOOLEAN, 32,
1347 TFS(&tfs_yes_no), 0x01, NULL, HFILL }},
1348
1349 { &hf_cdp_capabilities_trans_bridge,
1350 {"Transparent Bridge", "cdp.capabilities.trans_bridge", FT_BOOLEAN, 32,
1351 TFS(&tfs_yes_no), 0x02, NULL, HFILL }},
1352
1353 { &hf_cdp_capabilities_src_bridge,
1354 {"Source Route Bridge", "cdp.capabilities.src_bridge", FT_BOOLEAN, 32,
1355 TFS(&tfs_yes_no), 0x04, NULL, HFILL }},
1356
1357 { &hf_cdp_capabilities_switch,
1358 {"Switch", "cdp.capabilities.switch", FT_BOOLEAN, 32,
1359 TFS(&tfs_yes_no), 0x08, NULL, HFILL }},
1360
1361 { &hf_cdp_capabilities_host,
1362 {"Host", "cdp.capabilities.host", FT_BOOLEAN, 32,
1363 TFS(&tfs_yes_no), 0x10, NULL, HFILL }},
1364
1365 { &hf_cdp_capabilities_igmp_capable,
1366 {"IGMP capable", "cdp.capabilities.igmp_capable", FT_BOOLEAN, 32,
1367 TFS(&tfs_yes_no), 0x20, NULL, HFILL }},
1368
1369 { &hf_cdp_capabilities_repeater,
1370 {"Repeater", "cdp.capabilities.repeater", FT_BOOLEAN, 32,
1371 TFS(&tfs_yes_no), 0x40, NULL, HFILL }},
1372
1373 { &hf_cdp_capabilities_voip_phone,
1374 {"VoIP Phone", "cdp.capabilities.voip_phone", FT_BOOLEAN, 32,
1375 TFS(&tfs_yes_no), 0x80, NULL, HFILL }},
1376
1377 { &hf_cdp_capabilities_remote,
1378 {"Remotely Managed Device", "cdp.capabilities.remote", FT_BOOLEAN, 32,
1379 TFS(&tfs_yes_no), 0x0100, NULL, HFILL }},
1380
1381 { &hf_cdp_capabilities_cvta,
1382 {"CVTA/STP Dispute Resolution/Cisco VT Camera", "cdp.capabilities.cvta", FT_BOOLEAN, 32,
1383 TFS(&tfs_yes_no), 0x0200, NULL, HFILL }},
1384
1385 { &hf_cdp_capabilities_mac_relay,
1386 {"Two Port Mac Relay", "cdp.capabilities.mac_relay", FT_BOOLEAN, 32,
1387 TFS(&tfs_yes_no), 0x0400, NULL, HFILL }},
1388
1389 { &hf_cdp_spare_poe_tlv,
1390 { "Spare Pair PoE", "cdp.spare_poe_tlv", FT_UINT8, BASE_HEX,
1391 NULL, 0x0, NULL, HFILL }
1392 },
1393
1394 { &hf_cdp_spare_poe_tlv_poe,
1395 { "PSE Four-Wire PoE", "cdp.spare_poe_tlv.poe", FT_BOOLEAN, 8,
1396 TFS(&tfs_supported_not_supported), 0x01, NULL, HFILL }
1397 },
1398
1399 { &hf_cdp_spare_poe_tlv_spare_pair_arch,
1400 { "PD Spare Pair Architecture", "cdp.spare_poe_tlv.spare_pair_arch", FT_BOOLEAN, 8,
1401 TFS(&tfs_shared_independent), 0x02, NULL, HFILL }
1402 },
1403
1404 { &hf_cdp_spare_poe_tlv_req_spare_pair_poe,
1405 { "PD Request Spare Pair PoE", "cdp.spare_poe_tlv.req_spare_pair_poe", FT_BOOLEAN, 8,
1406 TFS(&tfs_on_off), 0x04, NULL, HFILL }
1407 },
1408
1409 { &hf_cdp_spare_poe_tlv_pse_spare_pair_poe,
1410 { "PSE Spare Pair PoE", "cdp.spare_poe_tlv.pse_spare_pair_poe", FT_BOOLEAN, 8,
1411 TFS(&tfs_on_off), 0x08, NULL, HFILL }
1412 },
1413
1414 /* Generated from convert_proto_tree_add_text.pl */
1415 { &hf_cdp_number_of_addresses, { "Number of addresses", "cdp.number_of_addresses", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1416 { &hf_cdp_odr_default_gateway, { "ODR Default gateway", "cdp.odr_default_gateway", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1417 { &hf_cdp_ip_prefix, { "IP Prefix", "cdp.ip_prefix", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1418 { &hf_cdp_oui, { "OUI", "cdp.oui", FT_UINT24, BASE_OUI, NULL, 0x0, NULL, HFILL }},
1419 { &hf_cdp_protocol_id, { "Protocol ID", "cdp.protocol_id", FT_UINT16, BASE_HEX, VALS(type_hello_vals), 0x0, NULL, HFILL }},
1420 { &hf_cdp_cluster_master_ip, { "Cluster Master IP", "cdp.cluster.master_ip", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1421 { &hf_cdp_cluster_ip, { "IP?", "cdp.cluster.ip", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1422 { &hf_cdp_cluster_version, { "Version?", "cdp.cluster.version", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
1423 { &hf_cdp_cluster_sub_version, { "Sub Version?", "cdp.cluster.sub_version", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
1424 { &hf_cdp_cluster_status, { "Status?", "cdp.cluster.status", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
1425 { &hf_cdp_cluster_unknown, { "UNKNOWN", "cdp.cluster.unknown", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
1426 { &hf_cdp_cluster_commander_mac, { "Cluster Commander MAC", "cdp.cluster.commander_mac", FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1427 { &hf_cdp_cluster_switch_mac, { "Switch's MAC", "cdp.cluster.switch_mac", FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1428 { &hf_cdp_cluster_management_vlan, { "Management VLAN", "cdp.cluster.management_vlan", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1429 { &hf_cdp_hello_unknown, { "Unknown", "cdp.hello.unknown", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1430 { &hf_cdp_vtp_management_domain, { "VTP Management Domain", "cdp.vtp_management_domain", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1431 { &hf_cdp_native_vlan, { "Native VLAN", "cdp.native_vlan", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1432 { &hf_cdp_duplex, { "Duplex", "cdp.duplex", FT_BOOLEAN, BASE_NONE, TFS(&tfs_full_half), 0x0, NULL, HFILL }},
1433 { &hf_cdp_data, { "Data", "cdp.data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1434 { &hf_cdp_voice_vlan, { "Voice VLAN", "cdp.voice_vlan", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1435 { &hf_cdp_power_consumption, { "Power Consumption", "cdp.power_consumption", FT_UINT16, BASE_DEC|BASE_UNIT_STRING, &units_mw, 0x0, NULL, HFILL }},
1436 { &hf_cdp_mtu, { "MTU", "cdp.mtu", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1437 { &hf_cdp_trust_bitmap, { "Trust Bitmap", "cdp.trust_bitmap", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
1438 { &hf_cdp_untrusted_port_cos, { "Untrusted port CoS", "cdp.untrusted_port_cos", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
1439 { &hf_cdp_system_name, { "System Name", "cdp.system_name", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1440 { &hf_cdp_system_object_identifier, { "System Object Identifier", "cdp.system_object_identifier", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1441 { &hf_cdp_location_unknown, { "UNKNOWN", "cdp.location.unknown", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
1442 { &hf_cdp_location, { "Location", "cdp.location", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1443 { &hf_cdp_request_id, { "Request-ID", "cdp.request_id", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1444 { &hf_cdp_management_id, { "Management-ID", "cdp.management_id", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1445 { &hf_cdp_power_requested, { "Power Requested", "cdp.power_requested", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_mw, 0x0, NULL, HFILL }},
1446 { &hf_cdp_power_available, { "Power Available", "cdp.power_available", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_mw, 0x0, NULL, HFILL }},
1447 { &hf_cdp_encrypted_data, { "Encrypted Data", "cdp.encrypted_data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1448 { &hf_cdp_seen_sequence, { "Seen Sequence?", "cdp.seen_sequence", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1449 { &hf_cdp_sequence_number, { "Sequence Number", "cdp.sequence_number", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1450 { &hf_cdp_model_number, { "Model Number", "cdp.model_number", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1451 { &hf_cdp_unknown_pad, { "Unknown Pad", "cdp.unknown_pad", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
1452 { &hf_cdp_hardware_version_id, { "Hardware Version ID", "cdp.hardware_version_id", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1453 { &hf_cdp_system_serial_number, { "System Serial Number", "cdp.system_serial_number", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1454 { &hf_cdp_nrgyz_unknown_values, { "Unknown Values", "cdp.nrgyz_unknown_values", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1455 { &hf_cdp_len_tlv_table, { "Length of TLV table", "cdp.len_tlv_table", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1456 { &hf_cdp_num_tlvs_table, { "Number of TLVs in table", "cdp.num_tlvs_table", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1457 { &hf_cdp_protocol, { "Protocol", "cdp.protocol", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1458 { &hf_cdp_protocol_type, { "Protocol type", "cdp.protocol_type", FT_UINT8, BASE_HEX, VALS(proto_type_vals), 0x0, NULL, HFILL }},
1459 { &hf_cdp_protocol_length, { "Protocol length", "cdp.protocol_length", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1460 { &hf_cdp_address, { "Address", "cdp.address", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1461 { &hf_cdp_address_length, { "Address length", "cdp.address_length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1462 { &hf_cdp_nrgyz_reply_to_unknown_field, { "Unknown Field", "cdp.nrgyz_reply_to.unknown_field", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
1463 { &hf_cdp_nrgyz_reply_to_port, { "Port", "cdp.nrgyz_reply_to.port", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1464 { &hf_cdp_nrgyz_ip_address, { "IP Address", "cdp.nrgyz.ip_address", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1465 { &hf_cdp_nrgyz_ip6_address, { "IPv6 Address", "cdp.nrgyz.ipv6_address", FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1466 { &hf_cdp_nrgyz_reply_to_ip_address, { "IP Address", "cdp.nrgyz_reply_to.ip_address", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1467 { &hf_cdp_nrgyz_reply_to_backup_server_port, { "Backup server Port?", "cdp.nrgyz_reply_to.backup_server_port", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
1468 { &hf_cdp_nrgyz_reply_to_backup_server_ip, { "Backup Server IP?", "cdp.nrgyz_reply_to.backup_server_ip", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1469 { &hf_cdp_nrgyz_reply_to_name, { "Name", "cdp.nrgyz_reply_to.name", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1470 { &hf_cdp_nrgyz_reply_to_domain, { "Domain", "cdp.nrgyz_reply_to.domain", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1471 { &hf_cdp_nrgyz_reply_to_role, { "Role", "cdp.nrgyz_reply_to.role", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1472 { &hf_cdp_software_version, { "Software version", "cdp.software_version", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }},
1473 };
1474
1475 static gint *ett[] = {
1476 &ett_cdp,
1477 &ett_cdp_tlv,
1478 &ett_cdp_nrgyz_tlv,
1479 &ett_cdp_address,
1480 &ett_cdp_capabilities,
1481 &ett_cdp_checksum,
1482 &ett_cdp_spare_poe_tlv
1483 };
1484
1485 static ei_register_info ei[] = {
1486 { &ei_cdp_invalid_data, { "cdp.invalid_data", PI_MALFORMED, PI_ERROR, "Invalid bytes at end", EXPFILL }},
1487 { &ei_cdp_nrgyz_tlvlength, { "cdp.nrgyz_tlv.length.invalid", PI_MALFORMED, PI_ERROR, "TLV with invalid length", EXPFILL }},
1488 { &ei_cdp_checksum, { "cdp.bad_checksum", PI_CHECKSUM, PI_ERROR, "Bad checksum", EXPFILL }},
1489 };
1490
1491 expert_module_t* expert_cdp;
1492
1493 proto_cdp = proto_register_protocol("Cisco Discovery Protocol", "CDP", "cdp");
1494
1495 proto_register_field_array(proto_cdp, hf, array_length(hf));
1496 proto_register_subtree_array(ett, array_length(ett));
1497 expert_cdp = expert_register_protocol(proto_cdp);
1498 expert_register_field_array(expert_cdp, ei, array_length(ei));
1499 }
1500
1501 void
proto_reg_handoff_cdp(void)1502 proto_reg_handoff_cdp(void)
1503 {
1504 dissector_handle_t cdp_handle;
1505
1506 cdp_handle = create_dissector_handle(dissect_cdp, proto_cdp);
1507 dissector_add_uint("llc.cisco_pid", CISCO_PID_CDP, cdp_handle);
1508 dissector_add_uint("chdlc.protocol", 0x2000, cdp_handle);
1509 dissector_add_uint("ppp.protocol", 0x0207, cdp_handle);
1510 dissector_add_uint("gre.proto", 0x2000, cdp_handle);
1511 }
1512
1513 /*
1514 * Editor modelines - https://www.wireshark.org/tools/modelines.html
1515 *
1516 * Local variables:
1517 * c-basic-offset: 4
1518 * tab-width: 8
1519 * indent-tabs-mode: nil
1520 * End:
1521 *
1522 * vi: set shiftwidth=4 tabstop=8 expandtab:
1523 * :indentSize=4:tabSize=8:noTabs=true:
1524 */
1525