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Merge pull request #588 from glebius/casper
[tcpdump] / print-lspping.c
1 /*
2 * Redistribution and use in source and binary forms, with or without
3 * modification, are permitted provided that: (1) source code
4 * distributions retain the above copyright notice and this paragraph
5 * in its entirety, and (2) distributions including binary code include
6 * the above copyright notice and this paragraph in its entirety in
7 * the documentation or other materials provided with the distribution.
8 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
9 * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
10 * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
11 * FOR A PARTICULAR PURPOSE.
12 *
13 * Original code by Hannes Gredler (hannes@juniper.net)
14 */
15
16 /* \summary: MPLS LSP PING printer */
17
18 #ifdef HAVE_CONFIG_H
19 #include "config.h"
20 #endif
21
22 #include <netdissect-stdinc.h>
23
24 #include "netdissect.h"
25 #include "extract.h"
26 #include "addrtoname.h"
27
28 #include "l2vpn.h"
29 #include "oui.h"
30
31 /* RFC 4349 */
32
33 /*
34 * LSPPING common header
35 *
36 * 0 1 2 3
37 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
38 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
39 * | Version Number | Must Be Zero |
40 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
41 * | Message Type | Reply mode | Return Code | Return Subcode|
42 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
43 * | Sender's Handle |
44 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
45 * | Sequence Number |
46 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
47 * | TimeStamp Sent (seconds) |
48 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
49 * | TimeStamp Sent (microseconds) |
50 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
51 * | TimeStamp Received (seconds) |
52 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
53 * | TimeStamp Received (microseconds) |
54 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
55 * | TLVs ... |
56 * . .
57 * . .
58 * . .
59 */
60
61 struct lspping_common_header {
62 uint8_t version[2];
63 uint8_t global_flags[2];
64 uint8_t msg_type;
65 uint8_t reply_mode;
66 uint8_t return_code;
67 uint8_t return_subcode;
68 uint8_t sender_handle[4];
69 uint8_t seq_number[4];
70 uint8_t ts_sent_sec[4];
71 uint8_t ts_sent_usec[4];
72 uint8_t ts_rcvd_sec[4];
73 uint8_t ts_rcvd_usec[4];
74 };
75
76 #define LSPPING_VERSION 1
77
78 static const struct tok lspping_msg_type_values[] = {
79 { 1, "MPLS Echo Request"},
80 { 2, "MPLS Echo Reply"},
81 { 0, NULL}
82 };
83
84 static const struct tok lspping_reply_mode_values[] = {
85 { 1, "Do not reply"},
86 { 2, "Reply via an IPv4/IPv6 UDP packet"},
87 { 3, "Reply via an IPv4/IPv6 UDP packet with Router Alert"},
88 { 4, "Reply via application level control channel"},
89 { 0, NULL}
90 };
91
92 static const struct tok lspping_return_code_values[] = {
93 { 0, "No return code or return code contained in the Error Code TLV"},
94 { 1, "Malformed echo request received"},
95 { 2, "One or more of the TLVs was not understood"},
96 { 3, "Replying router is an egress for the FEC at stack depth"},
97 { 4, "Replying router has no mapping for the FEC at stack depth"},
98 { 5, "Reserved"},
99 { 6, "Reserved"},
100 { 7, "Reserved"},
101 { 8, "Label switched at stack-depth"},
102 { 9, "Label switched but no MPLS forwarding at stack-depth"},
103 { 10, "Mapping for this FEC is not the given label at stack depth"},
104 { 11, "No label entry at stack-depth"},
105 { 12, "Protocol not associated with interface at FEC stack depth"},
106 { 13, "Premature termination of ping due to label stack shrinking to a single label"},
107 };
108
109
110 /*
111 * LSPPING TLV header
112 * 0 1 2 3
113 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
114 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
115 * | Type | Length |
116 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
117 * | Value |
118 * . .
119 * . .
120 * . .
121 * | |
122 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
123 */
124
125 struct lspping_tlv_header {
126 uint8_t type[2];
127 uint8_t length[2];
128 };
129
130 #define LSPPING_TLV_TARGET_FEC_STACK 1
131 #define LSPPING_TLV_DOWNSTREAM_MAPPING 2
132 #define LSPPING_TLV_PAD 3
133 /* not assigned 4 */
134 #define LSPPING_TLV_VENDOR_ENTERPRISE 5
135 #define LSPPING_TLV_VENDOR_ENTERPRISE_LEN 4
136 /* not assigned 6 */
137 #define LSPPING_TLV_INTERFACE_LABEL_STACK 7
138 /* not assigned 8 */
139 #define LSPPING_TLV_ERROR_CODE 9
140 #define LSPPING_TLV_REPLY_TOS_BYTE 10
141 #define LSPPING_TLV_BFD_DISCRIMINATOR 15 /* draft-ietf-bfd-mpls-02 */
142 #define LSPPING_TLV_BFD_DISCRIMINATOR_LEN 4
143 #define LSPPING_TLV_VENDOR_PRIVATE 0xfc00
144
145 static const struct tok lspping_tlv_values[] = {
146 { LSPPING_TLV_TARGET_FEC_STACK, "Target FEC Stack" },
147 { LSPPING_TLV_DOWNSTREAM_MAPPING, "Downstream Mapping" },
148 { LSPPING_TLV_PAD, "Pad" },
149 { LSPPING_TLV_ERROR_CODE, "Error Code" },
150 { LSPPING_TLV_VENDOR_ENTERPRISE, "Vendor Enterprise Code" },
151 { LSPPING_TLV_INTERFACE_LABEL_STACK, "Interface Label Stack" },
152 { LSPPING_TLV_REPLY_TOS_BYTE, "Reply TOS Byte" },
153 { LSPPING_TLV_BFD_DISCRIMINATOR, "BFD Discriminator" },
154 { LSPPING_TLV_VENDOR_PRIVATE, "Vendor Private Code" },
155 { 0, NULL}
156 };
157
158 #define LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV4 1
159 #define LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV6 2
160 #define LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV4 3
161 #define LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV6 4
162 /* not assigned 5 */
163 #define LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV4 6
164 #define LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV6 7
165 #define LSPPING_TLV_TARGETFEC_SUBTLV_L2VPN_ENDPT 8
166 #define LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW_OLD 9
167 #define LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW 10
168 #define LSPPING_TLV_TARGETFEC_SUBTLV_FEC_129_PW 11
169 #define LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV4 12
170 #define LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV6 13
171 #define LSPPING_TLV_TARGETFEC_SUBTLV_GENERIC_IPV4 14
172 #define LSPPING_TLV_TARGETFEC_SUBTLV_GENERIC_IPV6 15
173 #define LSPPING_TLV_TARGETFEC_SUBTLV_NIL_FEC 16
174
175 static const struct tok lspping_tlvtargetfec_subtlv_values[] = {
176 { LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV4, "LDP IPv4 prefix"},
177 { LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV6, "LDP IPv6 prefix"},
178 { LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV4, "RSVP IPv4 Session Query"},
179 { LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV6, "RSVP IPv6 Session Query"},
180 { 5, "Reserved"},
181 { LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV4, "VPN IPv4 prefix"},
182 { LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV6, "VPN IPv6 prefix"},
183 { LSPPING_TLV_TARGETFEC_SUBTLV_L2VPN_ENDPT, "L2 VPN endpoint"},
184 { LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW_OLD, "FEC 128 pseudowire (old)"},
185 { LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW, "FEC 128 pseudowire"},
186 { LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV4, "BGP labeled IPv4 prefix"},
187 { LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV6, "BGP labeled IPv6 prefix"},
188 { 0, NULL}
189 };
190
191 /*
192 * 0 1 2 3
193 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
194 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
195 * | IPv4 prefix |
196 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
197 * | Prefix Length | Must Be Zero |
198 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
199 */
200 struct lspping_tlv_targetfec_subtlv_ldp_ipv4_t {
201 uint8_t prefix [4];
202 uint8_t prefix_len;
203 };
204
205 /*
206 * 0 1 2 3
207 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
208 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
209 * | IPv6 prefix |
210 * | (16 octets) |
211 * | |
212 * | |
213 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
214 * | Prefix Length | Must Be Zero |
215 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
216 */
217 struct lspping_tlv_targetfec_subtlv_ldp_ipv6_t {
218 uint8_t prefix [16];
219 uint8_t prefix_len;
220 };
221
222 /*
223 * 0 1 2 3
224 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
225 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
226 * | IPv4 tunnel end point address |
227 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
228 * | Must Be Zero | Tunnel ID |
229 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
230 * | Extended Tunnel ID |
231 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
232 * | IPv4 tunnel sender address |
233 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
234 * | Must Be Zero | LSP ID |
235 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
236 */
237 struct lspping_tlv_targetfec_subtlv_rsvp_ipv4_t {
238 uint8_t tunnel_endpoint [4];
239 uint8_t res[2];
240 uint8_t tunnel_id[2];
241 uint8_t extended_tunnel_id[4];
242 uint8_t tunnel_sender [4];
243 uint8_t res2[2];
244 uint8_t lsp_id [2];
245 };
246
247 /*
248 * 0 1 2 3
249 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
250 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
251 * | IPv6 tunnel end point address |
252 * | |
253 * | |
254 * | |
255 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
256 * | Must Be Zero | Tunnel ID |
257 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
258 * | Extended Tunnel ID |
259 * | |
260 * | |
261 * | |
262 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
263 * | IPv6 tunnel sender address |
264 * | |
265 * | |
266 * | |
267 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
268 * | Must Be Zero | LSP ID |
269 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
270 */
271 struct lspping_tlv_targetfec_subtlv_rsvp_ipv6_t {
272 uint8_t tunnel_endpoint [16];
273 uint8_t res[2];
274 uint8_t tunnel_id[2];
275 uint8_t extended_tunnel_id[16];
276 uint8_t tunnel_sender [16];
277 uint8_t res2[2];
278 uint8_t lsp_id [2];
279 };
280
281 /*
282 * 0 1 2 3
283 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
284 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
285 * | Route Distinguisher |
286 * | (8 octets) |
287 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
288 * | IPv4 prefix |
289 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
290 * | Prefix Length | Must Be Zero |
291 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
292 */
293 struct lspping_tlv_targetfec_subtlv_l3vpn_ipv4_t {
294 uint8_t rd [8];
295 uint8_t prefix [4];
296 uint8_t prefix_len;
297 };
298
299 /*
300 * 0 1 2 3
301 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
302 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
303 * | Route Distinguisher |
304 * | (8 octets) |
305 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
306 * | IPv6 prefix |
307 * | (16 octets) |
308 * | |
309 * | |
310 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
311 * | Prefix Length | Must Be Zero |
312 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
313 */
314 struct lspping_tlv_targetfec_subtlv_l3vpn_ipv6_t {
315 uint8_t rd [8];
316 uint8_t prefix [16];
317 uint8_t prefix_len;
318 };
319
320 /*
321 * 0 1 2 3
322 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
323 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
324 * | Route Distinguisher |
325 * | (8 octets) |
326 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
327 * | Sender's VE ID | Receiver's VE ID |
328 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
329 * | Encapsulation Type | Must Be Zero |
330 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
331 * 0 1 2 3
332 */
333 struct lspping_tlv_targetfec_subtlv_l2vpn_endpt_t {
334 uint8_t rd [8];
335 uint8_t sender_ve_id [2];
336 uint8_t receiver_ve_id [2];
337 uint8_t encapsulation[2];
338 };
339
340 /*
341 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
342 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
343 * | Remote PE Address |
344 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
345 * | PW ID |
346 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
347 * | PW Type | Must Be Zero |
348 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
349 */
350 struct lspping_tlv_targetfec_subtlv_fec_128_pw_old {
351 uint8_t remote_pe_address [4];
352 uint8_t pw_id [4];
353 uint8_t pw_type[2];
354 };
355
356 /*
357 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
358 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
359 * | Sender's PE Address |
360 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
361 * | Remote PE Address |
362 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
363 * | PW ID |
364 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
365 * | PW Type | Must Be Zero |
366 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
367 */
368 struct lspping_tlv_targetfec_subtlv_fec_128_pw {
369 uint8_t sender_pe_address [4];
370 uint8_t remote_pe_address [4];
371 uint8_t pw_id [4];
372 uint8_t pw_type[2];
373 };
374
375 /*
376 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
377 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
378 * | IPv4 prefix |
379 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
380 * | Prefix Length | Must Be Zero |
381 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
382 */
383 struct lspping_tlv_targetfec_subtlv_bgp_ipv4_t {
384 uint8_t prefix [4];
385 uint8_t prefix_len;
386 };
387
388 /*
389 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
390 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
391 * | IPv6 prefix |
392 * | (16 octets) |
393 * | |
394 * | |
395 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
396 * | Prefix Length | Must Be Zero |
397 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
398 */
399 struct lspping_tlv_targetfec_subtlv_bgp_ipv6_t {
400 uint8_t prefix [16];
401 uint8_t prefix_len;
402 };
403
404 /*
405 * 0 1 2 3
406 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
407 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
408 * | MTU | Address Type | Resvd (SBZ) |
409 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
410 * | Downstream IP Address (4 or 16 octets) |
411 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
412 * | Downstream Interface Address (4 or 16 octets) |
413 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
414 * | Multipath Type| Depth Limit | Multipath Length |
415 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
416 * . .
417 * . (Multipath Information) .
418 * . .
419 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
420 * | Downstream Label | Protocol |
421 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
422 * . .
423 * . .
424 * . .
425 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
426 * | Downstream Label | Protocol |
427 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
428 */
429 /* Enough to get the address type */
430 struct lspping_tlv_downstream_map_t {
431 uint8_t mtu [2];
432 uint8_t address_type;
433 uint8_t ds_flags;
434 };
435
436 struct lspping_tlv_downstream_map_ipv4_t {
437 uint8_t mtu [2];
438 uint8_t address_type;
439 uint8_t ds_flags;
440 uint8_t downstream_ip[4];
441 uint8_t downstream_interface[4];
442 };
443
444 struct lspping_tlv_downstream_map_ipv4_unmb_t {
445 uint8_t mtu [2];
446 uint8_t address_type;
447 uint8_t ds_flags;
448 uint8_t downstream_ip[4];
449 uint8_t downstream_interface[4];
450 };
451
452 struct lspping_tlv_downstream_map_ipv6_t {
453 uint8_t mtu [2];
454 uint8_t address_type;
455 uint8_t ds_flags;
456 uint8_t downstream_ip[16];
457 uint8_t downstream_interface[16];
458 };
459
460 struct lspping_tlv_downstream_map_ipv6_unmb_t {
461 uint8_t mtu [2];
462 uint8_t address_type;
463 uint8_t ds_flags;
464 uint8_t downstream_ip[16];
465 uint8_t downstream_interface[4];
466 };
467
468 struct lspping_tlv_downstream_map_info_t {
469 uint8_t multipath_type;
470 uint8_t depth_limit;
471 uint8_t multipath_length [2];
472 };
473
474 #define LSPPING_AFI_IPV4 1
475 #define LSPPING_AFI_IPV4_UNMB 2
476 #define LSPPING_AFI_IPV6 3
477 #define LSPPING_AFI_IPV6_UNMB 4
478
479 static const struct tok lspping_tlv_downstream_addr_values[] = {
480 { LSPPING_AFI_IPV4, "IPv4"},
481 { LSPPING_AFI_IPV4_UNMB, "Unnumbered IPv4"},
482 { LSPPING_AFI_IPV6, "IPv6"},
483 { LSPPING_AFI_IPV6_UNMB, "IPv6"},
484 { 0, NULL}
485 };
486
487 void
488 lspping_print(netdissect_options *ndo,
489 register const u_char *pptr, register u_int len)
490 {
491 const struct lspping_common_header *lspping_com_header;
492 const struct lspping_tlv_header *lspping_tlv_header;
493 const struct lspping_tlv_header *lspping_subtlv_header;
494 const u_char *tptr,*tlv_tptr,*subtlv_tptr;
495 u_int tlen,lspping_tlv_len,lspping_tlv_type,tlv_tlen;
496 int tlv_hexdump,subtlv_hexdump;
497 u_int lspping_subtlv_len,lspping_subtlv_type;
498 struct timeval timestamp;
499
500 union {
501 const struct lspping_tlv_downstream_map_t *lspping_tlv_downstream_map;
502 const struct lspping_tlv_downstream_map_ipv4_t *lspping_tlv_downstream_map_ipv4;
503 const struct lspping_tlv_downstream_map_ipv4_unmb_t *lspping_tlv_downstream_map_ipv4_unmb;
504 const struct lspping_tlv_downstream_map_ipv6_t *lspping_tlv_downstream_map_ipv6;
505 const struct lspping_tlv_downstream_map_ipv6_unmb_t *lspping_tlv_downstream_map_ipv6_unmb;
506 const struct lspping_tlv_downstream_map_info_t *lspping_tlv_downstream_map_info;
507 } tlv_ptr;
508
509 union {
510 const struct lspping_tlv_targetfec_subtlv_ldp_ipv4_t *lspping_tlv_targetfec_subtlv_ldp_ipv4;
511 const struct lspping_tlv_targetfec_subtlv_ldp_ipv6_t *lspping_tlv_targetfec_subtlv_ldp_ipv6;
512 const struct lspping_tlv_targetfec_subtlv_rsvp_ipv4_t *lspping_tlv_targetfec_subtlv_rsvp_ipv4;
513 const struct lspping_tlv_targetfec_subtlv_rsvp_ipv6_t *lspping_tlv_targetfec_subtlv_rsvp_ipv6;
514 const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv4_t *lspping_tlv_targetfec_subtlv_l3vpn_ipv4;
515 const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv6_t *lspping_tlv_targetfec_subtlv_l3vpn_ipv6;
516 const struct lspping_tlv_targetfec_subtlv_l2vpn_endpt_t *lspping_tlv_targetfec_subtlv_l2vpn_endpt;
517 const struct lspping_tlv_targetfec_subtlv_fec_128_pw_old *lspping_tlv_targetfec_subtlv_l2vpn_vcid_old;
518 const struct lspping_tlv_targetfec_subtlv_fec_128_pw *lspping_tlv_targetfec_subtlv_l2vpn_vcid;
519 const struct lspping_tlv_targetfec_subtlv_bgp_ipv4_t *lspping_tlv_targetfec_subtlv_bgp_ipv4;
520 const struct lspping_tlv_targetfec_subtlv_bgp_ipv6_t *lspping_tlv_targetfec_subtlv_bgp_ipv6;
521 } subtlv_ptr;
522
523 tptr=pptr;
524 lspping_com_header = (const struct lspping_common_header *)pptr;
525 if (len < sizeof(const struct lspping_common_header))
526 goto tooshort;
527 ND_TCHECK(*lspping_com_header);
528
529 /*
530 * Sanity checking of the header.
531 */
532 if (EXTRACT_16BITS(&lspping_com_header->version[0]) != LSPPING_VERSION) {
533 ND_PRINT((ndo, "LSP-PING version %u packet not supported",
534 EXTRACT_16BITS(&lspping_com_header->version[0])));
535 return;
536 }
537
538 /* in non-verbose mode just lets print the basic Message Type*/
539 if (ndo->ndo_vflag < 1) {
540 ND_PRINT((ndo, "LSP-PINGv%u, %s, seq %u, length: %u",
541 EXTRACT_16BITS(&lspping_com_header->version[0]),
542 tok2str(lspping_msg_type_values, "unknown (%u)",lspping_com_header->msg_type),
543 EXTRACT_32BITS(lspping_com_header->seq_number),
544 len));
545 return;
546 }
547
548 /* ok they seem to want to know everything - lets fully decode it */
549
550 tlen=len;
551
552 ND_PRINT((ndo, "\n\tLSP-PINGv%u, msg-type: %s (%u), length: %u\n\t reply-mode: %s (%u)",
553 EXTRACT_16BITS(&lspping_com_header->version[0]),
554 tok2str(lspping_msg_type_values, "unknown",lspping_com_header->msg_type),
555 lspping_com_header->msg_type,
556 len,
557 tok2str(lspping_reply_mode_values, "unknown",lspping_com_header->reply_mode),
558 lspping_com_header->reply_mode));
559
560 /*
561 * the following return codes require that the subcode is attached
562 * at the end of the translated token output
563 */
564 if (lspping_com_header->return_code == 3 ||
565 lspping_com_header->return_code == 4 ||
566 lspping_com_header->return_code == 8 ||
567 lspping_com_header->return_code == 10 ||
568 lspping_com_header->return_code == 11 ||
569 lspping_com_header->return_code == 12 )
570 ND_PRINT((ndo, "\n\t Return Code: %s %u (%u)\n\t Return Subcode: (%u)",
571 tok2str(lspping_return_code_values, "unknown",lspping_com_header->return_code),
572 lspping_com_header->return_subcode,
573 lspping_com_header->return_code,
574 lspping_com_header->return_subcode));
575 else
576 ND_PRINT((ndo, "\n\t Return Code: %s (%u)\n\t Return Subcode: (%u)",
577 tok2str(lspping_return_code_values, "unknown",lspping_com_header->return_code),
578 lspping_com_header->return_code,
579 lspping_com_header->return_subcode));
580
581 ND_PRINT((ndo, "\n\t Sender Handle: 0x%08x, Sequence: %u",
582 EXTRACT_32BITS(lspping_com_header->sender_handle),
583 EXTRACT_32BITS(lspping_com_header->seq_number)));
584
585 timestamp.tv_sec=EXTRACT_32BITS(lspping_com_header->ts_sent_sec);
586 timestamp.tv_usec=EXTRACT_32BITS(lspping_com_header->ts_sent_usec);
587 ND_PRINT((ndo, "\n\t Sender Timestamp: "));
588 ts_print(ndo, &timestamp);
589
590 timestamp.tv_sec=EXTRACT_32BITS(lspping_com_header->ts_rcvd_sec);
591 timestamp.tv_usec=EXTRACT_32BITS(lspping_com_header->ts_rcvd_usec);
592 ND_PRINT((ndo, "Receiver Timestamp: "));
593 if ((timestamp.tv_sec != 0) && (timestamp.tv_usec != 0))
594 ts_print(ndo, &timestamp);
595 else
596 ND_PRINT((ndo, "no timestamp"));
597
598 tptr+=sizeof(const struct lspping_common_header);
599 tlen-=sizeof(const struct lspping_common_header);
600
601 while (tlen != 0) {
602 /* Does the TLV go past the end of the packet? */
603 if (tlen < sizeof(struct lspping_tlv_header))
604 goto tooshort;
605
606 /* did we capture enough for fully decoding the tlv header ? */
607 ND_TCHECK2(*tptr, sizeof(struct lspping_tlv_header));
608
609 lspping_tlv_header = (const struct lspping_tlv_header *)tptr;
610 lspping_tlv_type=EXTRACT_16BITS(lspping_tlv_header->type);
611 lspping_tlv_len=EXTRACT_16BITS(lspping_tlv_header->length);
612
613 ND_PRINT((ndo, "\n\t %s TLV (%u), length: %u",
614 tok2str(lspping_tlv_values,
615 "Unknown",
616 lspping_tlv_type),
617 lspping_tlv_type,
618 lspping_tlv_len));
619
620 /* some little sanity checking */
621 if (lspping_tlv_len == 0) {
622 tptr+=sizeof(struct lspping_tlv_header);
623 tlen-=sizeof(struct lspping_tlv_header);
624 continue; /* no value to dissect */
625 }
626
627 tlv_tptr=tptr+sizeof(struct lspping_tlv_header);
628 tlv_tlen=lspping_tlv_len; /* header not included -> no adjustment */
629
630 /* Does the TLV go past the end of the packet? */
631 if (tlen < lspping_tlv_len+sizeof(struct lspping_tlv_header))
632 goto tooshort;
633 /* did we capture enough for fully decoding the tlv ? */
634 ND_TCHECK2(*tlv_tptr, lspping_tlv_len);
635 tlv_hexdump=FALSE;
636
637 switch(lspping_tlv_type) {
638 case LSPPING_TLV_TARGET_FEC_STACK:
639 while (tlv_tlen != 0) {
640 /* Does the subTLV header go past the end of the TLV? */
641 if (tlv_tlen < sizeof(struct lspping_tlv_header)) {
642 ND_PRINT((ndo, "\n\t TLV is too short"));
643 tlv_hexdump = TRUE;
644 goto tlv_tooshort;
645 }
646 /* did we capture enough for fully decoding the subtlv header ? */
647 ND_TCHECK2(*tlv_tptr, sizeof(struct lspping_tlv_header));
648 subtlv_hexdump=FALSE;
649
650 lspping_subtlv_header = (const struct lspping_tlv_header *)tlv_tptr;
651 lspping_subtlv_type=EXTRACT_16BITS(lspping_subtlv_header->type);
652 lspping_subtlv_len=EXTRACT_16BITS(lspping_subtlv_header->length);
653 subtlv_tptr=tlv_tptr+sizeof(struct lspping_tlv_header);
654
655 /* Does the subTLV go past the end of the TLV? */
656 if (tlv_tlen < lspping_subtlv_len+sizeof(struct lspping_tlv_header)) {
657 ND_PRINT((ndo, "\n\t TLV is too short"));
658 tlv_hexdump = TRUE;
659 goto tlv_tooshort;
660 }
661
662 /* Did we capture enough for fully decoding the subTLV? */
663 ND_TCHECK2(*subtlv_tptr, lspping_subtlv_len);
664
665 ND_PRINT((ndo, "\n\t %s subTLV (%u), length: %u",
666 tok2str(lspping_tlvtargetfec_subtlv_values,
667 "Unknown",
668 lspping_subtlv_type),
669 lspping_subtlv_type,
670 lspping_subtlv_len));
671
672 switch(lspping_subtlv_type) {
673
674 case LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV4:
675 /* Is the subTLV length correct? */
676 if (lspping_subtlv_len != 5) {
677 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 5"));
678 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
679 } else {
680 subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv4 = \
681 (const struct lspping_tlv_targetfec_subtlv_ldp_ipv4_t *)subtlv_tptr;
682 ND_PRINT((ndo, "\n\t %s/%u",
683 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv4->prefix),
684 subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv4->prefix_len));
685 }
686 break;
687
688 case LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV6:
689 /* Is the subTLV length correct? */
690 if (lspping_subtlv_len != 17) {
691 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 17"));
692 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
693 } else {
694 subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv6 = \
695 (const struct lspping_tlv_targetfec_subtlv_ldp_ipv6_t *)subtlv_tptr;
696 ND_PRINT((ndo, "\n\t %s/%u",
697 ip6addr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv6->prefix),
698 subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv6->prefix_len));
699 }
700 break;
701
702 case LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV4:
703 /* Is the subTLV length correct? */
704 if (lspping_subtlv_len != 5) {
705 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 5"));
706 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
707 } else {
708 subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv4 = \
709 (const struct lspping_tlv_targetfec_subtlv_bgp_ipv4_t *)subtlv_tptr;
710 ND_PRINT((ndo, "\n\t %s/%u",
711 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv4->prefix),
712 subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv4->prefix_len));
713 }
714 break;
715
716 case LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV6:
717 /* Is the subTLV length correct? */
718 if (lspping_subtlv_len != 17) {
719 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 17"));
720 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
721 } else {
722 subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv6 = \
723 (const struct lspping_tlv_targetfec_subtlv_bgp_ipv6_t *)subtlv_tptr;
724 ND_PRINT((ndo, "\n\t %s/%u",
725 ip6addr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv6->prefix),
726 subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv6->prefix_len));
727 }
728 break;
729
730 case LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV4:
731 /* Is the subTLV length correct? */
732 if (lspping_subtlv_len != 20) {
733 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 20"));
734 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
735 } else {
736 subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4 = \
737 (const struct lspping_tlv_targetfec_subtlv_rsvp_ipv4_t *)subtlv_tptr;
738 ND_PRINT((ndo, "\n\t tunnel end-point %s, tunnel sender %s, lsp-id 0x%04x" \
739 "\n\t tunnel-id 0x%04x, extended tunnel-id %s",
740 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->tunnel_endpoint),
741 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->tunnel_sender),
742 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->lsp_id),
743 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->tunnel_id),
744 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->extended_tunnel_id)));
745 }
746 break;
747
748 case LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV6:
749 /* Is the subTLV length correct? */
750 if (lspping_subtlv_len != 56) {
751 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 56"));
752 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
753 } else {
754 subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6 = \
755 (const struct lspping_tlv_targetfec_subtlv_rsvp_ipv6_t *)subtlv_tptr;
756 ND_PRINT((ndo, "\n\t tunnel end-point %s, tunnel sender %s, lsp-id 0x%04x" \
757 "\n\t tunnel-id 0x%04x, extended tunnel-id %s",
758 ip6addr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->tunnel_endpoint),
759 ip6addr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->tunnel_sender),
760 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->lsp_id),
761 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->tunnel_id),
762 ip6addr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->extended_tunnel_id)));
763 }
764 break;
765
766 case LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV4:
767 /* Is the subTLV length correct? */
768 if (lspping_subtlv_len != 13) {
769 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 13"));
770 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
771 } else {
772 subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4 = \
773 (const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv4_t *)subtlv_tptr;
774 ND_PRINT((ndo, "\n\t RD: %s, %s/%u",
775 bgp_vpn_rd_print(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4->rd),
776 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4->prefix),
777 subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4->prefix_len));
778 }
779 break;
780
781 case LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV6:
782 /* Is the subTLV length correct? */
783 if (lspping_subtlv_len != 25) {
784 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 25"));
785 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
786 } else {
787 subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6 = \
788 (const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv6_t *)subtlv_tptr;
789 ND_PRINT((ndo, "\n\t RD: %s, %s/%u",
790 bgp_vpn_rd_print(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6->rd),
791 ip6addr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6->prefix),
792 subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6->prefix_len));
793 }
794 break;
795
796 case LSPPING_TLV_TARGETFEC_SUBTLV_L2VPN_ENDPT:
797 /* Is the subTLV length correct? */
798 if (lspping_subtlv_len != 14) {
799 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 14"));
800 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
801 } else {
802 subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt = \
803 (const struct lspping_tlv_targetfec_subtlv_l2vpn_endpt_t *)subtlv_tptr;
804 ND_PRINT((ndo, "\n\t RD: %s, Sender VE ID: %u, Receiver VE ID: %u" \
805 "\n\t Encapsulation Type: %s (%u)",
806 bgp_vpn_rd_print(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->rd),
807 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->sender_ve_id),
808 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->receiver_ve_id),
809 tok2str(mpls_pw_types_values,
810 "unknown",
811 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->encapsulation)),
812 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->encapsulation)));
813 }
814 break;
815
816 /* the old L2VPN VCID subTLV does not have support for the sender field */
817 case LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW_OLD:
818 /* Is the subTLV length correct? */
819 if (lspping_subtlv_len != 10) {
820 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 10"));
821 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
822 } else {
823 subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old = \
824 (const struct lspping_tlv_targetfec_subtlv_fec_128_pw_old *)subtlv_tptr;
825 ND_PRINT((ndo, "\n\t Remote PE: %s" \
826 "\n\t PW ID: 0x%08x, PW Type: %s (%u)",
827 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->remote_pe_address),
828 EXTRACT_32BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->pw_id),
829 tok2str(mpls_pw_types_values,
830 "unknown",
831 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->pw_type)),
832 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->pw_type)));
833 }
834 break;
835
836 case LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW:
837 /* Is the subTLV length correct? */
838 if (lspping_subtlv_len != 14) {
839 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 14"));
840 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
841 } else {
842 subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid = \
843 (const struct lspping_tlv_targetfec_subtlv_fec_128_pw *)subtlv_tptr;
844 ND_PRINT((ndo, "\n\t Sender PE: %s, Remote PE: %s" \
845 "\n\t PW ID: 0x%08x, PW Type: %s (%u)",
846 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->sender_pe_address),
847 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->remote_pe_address),
848 EXTRACT_32BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->pw_id),
849 tok2str(mpls_pw_types_values,
850 "unknown",
851 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->pw_type)),
852 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->pw_type)));
853 }
854 break;
855
856 default:
857 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
858 break;
859 }
860 /* do we want to see an additionally subtlv hexdump ? */
861 if (ndo->ndo_vflag > 1 || subtlv_hexdump==TRUE)
862 print_unknown_data(ndo, tlv_tptr+sizeof(struct lspping_tlv_header), \
863 "\n\t ",
864 lspping_subtlv_len);
865
866 /* All subTLVs are aligned to four octet boundary */
867 if (lspping_subtlv_len % 4) {
868 lspping_subtlv_len += 4 - (lspping_subtlv_len % 4);
869 /* Does the subTLV, including padding, go past the end of the TLV? */
870 if (tlv_tlen < lspping_subtlv_len+sizeof(struct lspping_tlv_header)) {
871 ND_PRINT((ndo, "\n\t\t TLV is too short"));
872 return;
873 }
874 }
875 tlv_tptr+=lspping_subtlv_len;
876 tlv_tlen-=lspping_subtlv_len+sizeof(struct lspping_tlv_header);
877 }
878 break;
879
880 case LSPPING_TLV_DOWNSTREAM_MAPPING:
881 /* Does the header go past the end of the TLV? */
882 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_t)) {
883 ND_PRINT((ndo, "\n\t TLV is too short"));
884 tlv_hexdump = TRUE;
885 goto tlv_tooshort;
886 }
887 /* Did we capture enough to get the address family? */
888 ND_TCHECK2(*tlv_tptr, sizeof(struct lspping_tlv_downstream_map_t));
889
890 tlv_ptr.lspping_tlv_downstream_map= \
891 (const struct lspping_tlv_downstream_map_t *)tlv_tptr;
892
893 /* that strange thing with the downstream map TLV is that until now
894 * we do not know if its IPv4 or IPv6 or is unnumbered; after
895 * we find the address-type, we recast the tlv_tptr and move on. */
896
897 ND_PRINT((ndo, "\n\t MTU: %u, Address-Type: %s (%u)",
898 EXTRACT_16BITS(tlv_ptr.lspping_tlv_downstream_map->mtu),
899 tok2str(lspping_tlv_downstream_addr_values,
900 "unknown",
901 tlv_ptr.lspping_tlv_downstream_map->address_type),
902 tlv_ptr.lspping_tlv_downstream_map->address_type));
903
904 switch(tlv_ptr.lspping_tlv_downstream_map->address_type) {
905
906 case LSPPING_AFI_IPV4:
907 /* Does the data go past the end of the TLV? */
908 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv4_t)) {
909 ND_PRINT((ndo, "\n\t TLV is too short"));
910 tlv_hexdump = TRUE;
911 goto tlv_tooshort;
912 }
913 /* Did we capture enough for this part of the TLV? */
914 ND_TCHECK2(*tlv_tptr, sizeof(struct lspping_tlv_downstream_map_ipv4_t));
915
916 tlv_ptr.lspping_tlv_downstream_map_ipv4= \
917 (const struct lspping_tlv_downstream_map_ipv4_t *)tlv_tptr;
918 ND_PRINT((ndo, "\n\t Downstream IP: %s" \
919 "\n\t Downstream Interface IP: %s",
920 ipaddr_string(ndo, tlv_ptr.lspping_tlv_downstream_map_ipv4->downstream_ip),
921 ipaddr_string(ndo, tlv_ptr.lspping_tlv_downstream_map_ipv4->downstream_interface)));
922 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv4_t);
923 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv4_t);
924 break;
925 case LSPPING_AFI_IPV4_UNMB:
926 /* Does the data go past the end of the TLV? */
927 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t)) {
928 ND_PRINT((ndo, "\n\t TLV is too short"));
929 tlv_hexdump = TRUE;
930 goto tlv_tooshort;
931 }
932 /* Did we capture enough for this part of the TLV? */
933 ND_TCHECK2(*tlv_tptr, sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t));
934
935 tlv_ptr.lspping_tlv_downstream_map_ipv4_unmb= \
936 (const struct lspping_tlv_downstream_map_ipv4_unmb_t *)tlv_tptr;
937 ND_PRINT((ndo, "\n\t Downstream IP: %s" \
938 "\n\t Downstream Interface Index: 0x%08x",
939 ipaddr_string(ndo, tlv_ptr.lspping_tlv_downstream_map_ipv4_unmb->downstream_ip),
940 EXTRACT_32BITS(tlv_ptr.lspping_tlv_downstream_map_ipv4_unmb->downstream_interface)));
941 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t);
942 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t);
943 break;
944 case LSPPING_AFI_IPV6:
945 /* Does the data go past the end of the TLV? */
946 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv6_t)) {
947 ND_PRINT((ndo, "\n\t TLV is too short"));
948 tlv_hexdump = TRUE;
949 goto tlv_tooshort;
950 }
951 /* Did we capture enough for this part of the TLV? */
952 ND_TCHECK2(*tlv_tptr, sizeof(struct lspping_tlv_downstream_map_ipv6_t));
953
954 tlv_ptr.lspping_tlv_downstream_map_ipv6= \
955 (const struct lspping_tlv_downstream_map_ipv6_t *)tlv_tptr;
956 ND_PRINT((ndo, "\n\t Downstream IP: %s" \
957 "\n\t Downstream Interface IP: %s",
958 ip6addr_string(ndo, tlv_ptr.lspping_tlv_downstream_map_ipv6->downstream_ip),
959 ip6addr_string(ndo, tlv_ptr.lspping_tlv_downstream_map_ipv6->downstream_interface)));
960 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv6_t);
961 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv6_t);
962 break;
963 case LSPPING_AFI_IPV6_UNMB:
964 /* Does the data go past the end of the TLV? */
965 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t)) {
966 ND_PRINT((ndo, "\n\t TLV is too short"));
967 tlv_hexdump = TRUE;
968 goto tlv_tooshort;
969 }
970 /* Did we capture enough for this part of the TLV? */
971 ND_TCHECK2(*tlv_tptr, sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t));
972
973 tlv_ptr.lspping_tlv_downstream_map_ipv6_unmb= \
974 (const struct lspping_tlv_downstream_map_ipv6_unmb_t *)tlv_tptr;
975 ND_PRINT((ndo, "\n\t Downstream IP: %s" \
976 "\n\t Downstream Interface Index: 0x%08x",
977 ip6addr_string(ndo, tlv_ptr.lspping_tlv_downstream_map_ipv6_unmb->downstream_ip),
978 EXTRACT_32BITS(tlv_ptr.lspping_tlv_downstream_map_ipv6_unmb->downstream_interface)));
979 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t);
980 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t);
981 break;
982
983 default:
984 /* should not happen ! - no error message - tok2str() has barked already */
985 break;
986 }
987
988 /* Does the data go past the end of the TLV? */
989 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_info_t)) {
990 ND_PRINT((ndo, "\n\t TLV is too short"));
991 tlv_hexdump = TRUE;
992 goto tlv_tooshort;
993 }
994 /* Did we capture enough for this part of the TLV? */
995 ND_TCHECK2(*tlv_tptr, sizeof(struct lspping_tlv_downstream_map_info_t));
996
997 tlv_ptr.lspping_tlv_downstream_map_info= \
998 (const struct lspping_tlv_downstream_map_info_t *)tlv_tptr;
999
1000 /* FIXME add hash-key type, depth limit, multipath processing */
1001
1002 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_info_t);
1003 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_info_t);
1004
1005 /* FIXME print downstream labels */
1006
1007 tlv_hexdump=TRUE; /* dump the TLV until code complete */
1008
1009 break;
1010
1011 case LSPPING_TLV_BFD_DISCRIMINATOR:
1012 if (tlv_tlen < LSPPING_TLV_BFD_DISCRIMINATOR_LEN) {
1013 ND_PRINT((ndo, "\n\t TLV is too short"));
1014 tlv_hexdump = TRUE;
1015 goto tlv_tooshort;
1016 } else {
1017 ND_TCHECK2(*tptr, LSPPING_TLV_BFD_DISCRIMINATOR_LEN);
1018 ND_PRINT((ndo, "\n\t BFD Discriminator 0x%08x", EXTRACT_32BITS(tptr)));
1019 }
1020 break;
1021
1022 case LSPPING_TLV_VENDOR_ENTERPRISE:
1023 {
1024 uint32_t vendor_id;
1025
1026 if (tlv_tlen < LSPPING_TLV_VENDOR_ENTERPRISE_LEN) {
1027 ND_PRINT((ndo, "\n\t TLV is too short"));
1028 tlv_hexdump = TRUE;
1029 goto tlv_tooshort;
1030 } else {
1031 ND_TCHECK2(*tptr, LSPPING_TLV_VENDOR_ENTERPRISE_LEN);
1032 vendor_id = EXTRACT_32BITS(tlv_tptr);
1033 ND_PRINT((ndo, "\n\t Vendor: %s (0x%04x)",
1034 tok2str(smi_values, "Unknown", vendor_id),
1035 vendor_id));
1036 }
1037 }
1038 break;
1039
1040 /*
1041 * FIXME those are the defined TLVs that lack a decoder
1042 * you are welcome to contribute code ;-)
1043 */
1044 case LSPPING_TLV_PAD:
1045 case LSPPING_TLV_ERROR_CODE:
1046 case LSPPING_TLV_VENDOR_PRIVATE:
1047
1048 default:
1049 if (ndo->ndo_vflag <= 1)
1050 print_unknown_data(ndo, tlv_tptr, "\n\t ", tlv_tlen);
1051 break;
1052 }
1053 /* do we want to see an additionally tlv hexdump ? */
1054 tlv_tooshort:
1055 if (ndo->ndo_vflag > 1 || tlv_hexdump==TRUE)
1056 print_unknown_data(ndo, tptr+sizeof(struct lspping_tlv_header), "\n\t ",
1057 lspping_tlv_len);
1058
1059
1060 /* All TLVs are aligned to four octet boundary */
1061 if (lspping_tlv_len % 4) {
1062 lspping_tlv_len += (4 - lspping_tlv_len % 4);
1063 /* Does the TLV, including padding, go past the end of the packet? */
1064 if (tlen < lspping_tlv_len+sizeof(struct lspping_tlv_header))
1065 goto tooshort;
1066 }
1067
1068 tptr+=lspping_tlv_len+sizeof(struct lspping_tlv_header);
1069 tlen-=lspping_tlv_len+sizeof(struct lspping_tlv_header);
1070 }
1071 return;
1072 tooshort:
1073 ND_PRINT((ndo, "\n\t\t packet is too short"));
1074 return;
1075 trunc:
1076 ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
1077 return;
1078 }
1079 /*
1080 * Local Variables:
1081 * c-style: whitesmith
1082 * c-basic-offset: 8
1083 * End:
1084 */
[mirror] the TCPdump network dissector