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@gredler.at)
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 { 0, NULL},
108 };
109
110
111 /*
112 * LSPPING TLV header
113 * 0 1 2 3
114 * 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
115 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
116 * | Type | Length |
117 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
118 * | Value |
119 * . .
120 * . .
121 * . .
122 * | |
123 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
124 */
125
126 struct lspping_tlv_header {
127 uint8_t type[2];
128 uint8_t length[2];
129 };
130
131 #define LSPPING_TLV_TARGET_FEC_STACK 1
132 #define LSPPING_TLV_DOWNSTREAM_MAPPING 2
133 #define LSPPING_TLV_PAD 3
134 /* not assigned 4 */
135 #define LSPPING_TLV_VENDOR_ENTERPRISE 5
136 #define LSPPING_TLV_VENDOR_ENTERPRISE_LEN 4
137 /* not assigned 6 */
138 #define LSPPING_TLV_INTERFACE_LABEL_STACK 7
139 /* not assigned 8 */
140 #define LSPPING_TLV_ERROR_CODE 9
141 #define LSPPING_TLV_REPLY_TOS_BYTE 10
142 #define LSPPING_TLV_BFD_DISCRIMINATOR 15 /* draft-ietf-bfd-mpls-02 */
143 #define LSPPING_TLV_BFD_DISCRIMINATOR_LEN 4
144 #define LSPPING_TLV_VENDOR_PRIVATE 0xfc00
145
146 static const struct tok lspping_tlv_values[] = {
147 { LSPPING_TLV_TARGET_FEC_STACK, "Target FEC Stack" },
148 { LSPPING_TLV_DOWNSTREAM_MAPPING, "Downstream Mapping" },
149 { LSPPING_TLV_PAD, "Pad" },
150 { LSPPING_TLV_ERROR_CODE, "Error Code" },
151 { LSPPING_TLV_VENDOR_ENTERPRISE, "Vendor Enterprise Code" },
152 { LSPPING_TLV_INTERFACE_LABEL_STACK, "Interface Label Stack" },
153 { LSPPING_TLV_REPLY_TOS_BYTE, "Reply TOS Byte" },
154 { LSPPING_TLV_BFD_DISCRIMINATOR, "BFD Discriminator" },
155 { LSPPING_TLV_VENDOR_PRIVATE, "Vendor Private Code" },
156 { 0, NULL}
157 };
158
159 #define LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV4 1
160 #define LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV6 2
161 #define LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV4 3
162 #define LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV6 4
163 /* not assigned 5 */
164 #define LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV4 6
165 #define LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV6 7
166 #define LSPPING_TLV_TARGETFEC_SUBTLV_L2VPN_ENDPT 8
167 #define LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW_OLD 9
168 #define LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW 10
169 #define LSPPING_TLV_TARGETFEC_SUBTLV_FEC_129_PW 11
170 #define LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV4 12
171 #define LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV6 13
172 #define LSPPING_TLV_TARGETFEC_SUBTLV_GENERIC_IPV4 14
173 #define LSPPING_TLV_TARGETFEC_SUBTLV_GENERIC_IPV6 15
174 #define LSPPING_TLV_TARGETFEC_SUBTLV_NIL_FEC 16
175
176 static const struct tok lspping_tlvtargetfec_subtlv_values[] = {
177 { LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV4, "LDP IPv4 prefix"},
178 { LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV6, "LDP IPv6 prefix"},
179 { LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV4, "RSVP IPv4 Session Query"},
180 { LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV6, "RSVP IPv6 Session Query"},
181 { 5, "Reserved"},
182 { LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV4, "VPN IPv4 prefix"},
183 { LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV6, "VPN IPv6 prefix"},
184 { LSPPING_TLV_TARGETFEC_SUBTLV_L2VPN_ENDPT, "L2 VPN endpoint"},
185 { LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW_OLD, "FEC 128 pseudowire (old)"},
186 { LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW, "FEC 128 pseudowire"},
187 { LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV4, "BGP labeled IPv4 prefix"},
188 { LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV6, "BGP labeled IPv6 prefix"},
189 { 0, NULL}
190 };
191
192 /*
193 * 0 1 2 3
194 * 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
195 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
196 * | IPv4 prefix |
197 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
198 * | Prefix Length | Must Be Zero |
199 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
200 */
201 struct lspping_tlv_targetfec_subtlv_ldp_ipv4_t {
202 uint8_t prefix [4];
203 uint8_t prefix_len;
204 };
205
206 /*
207 * 0 1 2 3
208 * 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
209 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
210 * | IPv6 prefix |
211 * | (16 octets) |
212 * | |
213 * | |
214 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
215 * | Prefix Length | Must Be Zero |
216 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
217 */
218 struct lspping_tlv_targetfec_subtlv_ldp_ipv6_t {
219 uint8_t prefix [16];
220 uint8_t prefix_len;
221 };
222
223 /*
224 * 0 1 2 3
225 * 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
226 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
227 * | IPv4 tunnel end point address |
228 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
229 * | Must Be Zero | Tunnel ID |
230 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
231 * | Extended Tunnel ID |
232 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
233 * | IPv4 tunnel sender address |
234 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
235 * | Must Be Zero | LSP ID |
236 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
237 */
238 struct lspping_tlv_targetfec_subtlv_rsvp_ipv4_t {
239 uint8_t tunnel_endpoint [4];
240 uint8_t res[2];
241 uint8_t tunnel_id[2];
242 uint8_t extended_tunnel_id[4];
243 uint8_t tunnel_sender [4];
244 uint8_t res2[2];
245 uint8_t lsp_id [2];
246 };
247
248 /*
249 * 0 1 2 3
250 * 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
251 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
252 * | IPv6 tunnel end point address |
253 * | |
254 * | |
255 * | |
256 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
257 * | Must Be Zero | Tunnel ID |
258 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
259 * | Extended Tunnel ID |
260 * | |
261 * | |
262 * | |
263 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
264 * | IPv6 tunnel sender address |
265 * | |
266 * | |
267 * | |
268 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
269 * | Must Be Zero | LSP ID |
270 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
271 */
272 struct lspping_tlv_targetfec_subtlv_rsvp_ipv6_t {
273 uint8_t tunnel_endpoint [16];
274 uint8_t res[2];
275 uint8_t tunnel_id[2];
276 uint8_t extended_tunnel_id[16];
277 uint8_t tunnel_sender [16];
278 uint8_t res2[2];
279 uint8_t lsp_id [2];
280 };
281
282 /*
283 * 0 1 2 3
284 * 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
285 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
286 * | Route Distinguisher |
287 * | (8 octets) |
288 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
289 * | IPv4 prefix |
290 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
291 * | Prefix Length | Must Be Zero |
292 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
293 */
294 struct lspping_tlv_targetfec_subtlv_l3vpn_ipv4_t {
295 uint8_t rd [8];
296 uint8_t prefix [4];
297 uint8_t prefix_len;
298 };
299
300 /*
301 * 0 1 2 3
302 * 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
303 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
304 * | Route Distinguisher |
305 * | (8 octets) |
306 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
307 * | IPv6 prefix |
308 * | (16 octets) |
309 * | |
310 * | |
311 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
312 * | Prefix Length | Must Be Zero |
313 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
314 */
315 struct lspping_tlv_targetfec_subtlv_l3vpn_ipv6_t {
316 uint8_t rd [8];
317 uint8_t prefix [16];
318 uint8_t prefix_len;
319 };
320
321 /*
322 * 0 1 2 3
323 * 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
324 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
325 * | Route Distinguisher |
326 * | (8 octets) |
327 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
328 * | Sender's VE ID | Receiver's VE ID |
329 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
330 * | Encapsulation Type | Must Be Zero |
331 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
332 * 0 1 2 3
333 */
334 struct lspping_tlv_targetfec_subtlv_l2vpn_endpt_t {
335 uint8_t rd [8];
336 uint8_t sender_ve_id [2];
337 uint8_t receiver_ve_id [2];
338 uint8_t encapsulation[2];
339 };
340
341 /*
342 * 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
343 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
344 * | Remote PE Address |
345 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
346 * | PW ID |
347 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
348 * | PW Type | Must Be Zero |
349 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
350 */
351 struct lspping_tlv_targetfec_subtlv_fec_128_pw_old {
352 uint8_t remote_pe_address [4];
353 uint8_t pw_id [4];
354 uint8_t pw_type[2];
355 };
356
357 /*
358 * 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
359 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
360 * | Sender's PE Address |
361 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
362 * | Remote PE Address |
363 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
364 * | PW ID |
365 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
366 * | PW Type | Must Be Zero |
367 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
368 */
369 struct lspping_tlv_targetfec_subtlv_fec_128_pw {
370 uint8_t sender_pe_address [4];
371 uint8_t remote_pe_address [4];
372 uint8_t pw_id [4];
373 uint8_t pw_type[2];
374 };
375
376 /*
377 * 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
378 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
379 * | IPv4 prefix |
380 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
381 * | Prefix Length | Must Be Zero |
382 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
383 */
384 struct lspping_tlv_targetfec_subtlv_bgp_ipv4_t {
385 uint8_t prefix [4];
386 uint8_t prefix_len;
387 };
388
389 /*
390 * 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
391 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
392 * | IPv6 prefix |
393 * | (16 octets) |
394 * | |
395 * | |
396 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
397 * | Prefix Length | Must Be Zero |
398 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
399 */
400 struct lspping_tlv_targetfec_subtlv_bgp_ipv6_t {
401 uint8_t prefix [16];
402 uint8_t prefix_len;
403 };
404
405 /*
406 * 0 1 2 3
407 * 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
408 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
409 * | MTU | Address Type | Resvd (SBZ) |
410 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
411 * | Downstream IP Address (4 or 16 octets) |
412 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
413 * | Downstream Interface Address (4 or 16 octets) |
414 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
415 * | Multipath Type| Depth Limit | Multipath Length |
416 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
417 * . .
418 * . (Multipath Information) .
419 * . .
420 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
421 * | Downstream Label | Protocol |
422 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
423 * . .
424 * . .
425 * . .
426 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
427 * | Downstream Label | Protocol |
428 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
429 */
430 /* Enough to get the address type */
431 struct lspping_tlv_downstream_map_t {
432 uint8_t mtu [2];
433 uint8_t address_type;
434 uint8_t ds_flags;
435 };
436
437 struct lspping_tlv_downstream_map_ipv4_t {
438 uint8_t mtu [2];
439 uint8_t address_type;
440 uint8_t ds_flags;
441 uint8_t downstream_ip[4];
442 uint8_t downstream_interface[4];
443 };
444
445 struct lspping_tlv_downstream_map_ipv4_unmb_t {
446 uint8_t mtu [2];
447 uint8_t address_type;
448 uint8_t ds_flags;
449 uint8_t downstream_ip[4];
450 uint8_t downstream_interface[4];
451 };
452
453 struct lspping_tlv_downstream_map_ipv6_t {
454 uint8_t mtu [2];
455 uint8_t address_type;
456 uint8_t ds_flags;
457 uint8_t downstream_ip[16];
458 uint8_t downstream_interface[16];
459 };
460
461 struct lspping_tlv_downstream_map_ipv6_unmb_t {
462 uint8_t mtu [2];
463 uint8_t address_type;
464 uint8_t ds_flags;
465 uint8_t downstream_ip[16];
466 uint8_t downstream_interface[4];
467 };
468
469 struct lspping_tlv_downstream_map_info_t {
470 uint8_t multipath_type;
471 uint8_t depth_limit;
472 uint8_t multipath_length [2];
473 };
474
475 #define LSPPING_AFI_IPV4 1
476 #define LSPPING_AFI_IPV4_UNMB 2
477 #define LSPPING_AFI_IPV6 3
478 #define LSPPING_AFI_IPV6_UNMB 4
479
480 static const struct tok lspping_tlv_downstream_addr_values[] = {
481 { LSPPING_AFI_IPV4, "IPv4"},
482 { LSPPING_AFI_IPV4_UNMB, "Unnumbered IPv4"},
483 { LSPPING_AFI_IPV6, "IPv6"},
484 { LSPPING_AFI_IPV6_UNMB, "IPv6"},
485 { 0, NULL}
486 };
487
488 void
lspping_print(netdissect_options * ndo,register const u_char * pptr,register u_int len)489 lspping_print(netdissect_options *ndo,
490 register const u_char *pptr, register u_int len)
491 {
492 const struct lspping_common_header *lspping_com_header;
493 const struct lspping_tlv_header *lspping_tlv_header;
494 const struct lspping_tlv_header *lspping_subtlv_header;
495 const u_char *tptr,*tlv_tptr,*subtlv_tptr;
496 u_int tlen,lspping_tlv_len,lspping_tlv_type,tlv_tlen;
497 int tlv_hexdump,subtlv_hexdump;
498 u_int lspping_subtlv_len,lspping_subtlv_type;
499 struct timeval timestamp;
500
501 union {
502 const struct lspping_tlv_downstream_map_t *lspping_tlv_downstream_map;
503 const struct lspping_tlv_downstream_map_ipv4_t *lspping_tlv_downstream_map_ipv4;
504 const struct lspping_tlv_downstream_map_ipv4_unmb_t *lspping_tlv_downstream_map_ipv4_unmb;
505 const struct lspping_tlv_downstream_map_ipv6_t *lspping_tlv_downstream_map_ipv6;
506 const struct lspping_tlv_downstream_map_ipv6_unmb_t *lspping_tlv_downstream_map_ipv6_unmb;
507 const struct lspping_tlv_downstream_map_info_t *lspping_tlv_downstream_map_info;
508 } tlv_ptr;
509
510 union {
511 const struct lspping_tlv_targetfec_subtlv_ldp_ipv4_t *lspping_tlv_targetfec_subtlv_ldp_ipv4;
512 const struct lspping_tlv_targetfec_subtlv_ldp_ipv6_t *lspping_tlv_targetfec_subtlv_ldp_ipv6;
513 const struct lspping_tlv_targetfec_subtlv_rsvp_ipv4_t *lspping_tlv_targetfec_subtlv_rsvp_ipv4;
514 const struct lspping_tlv_targetfec_subtlv_rsvp_ipv6_t *lspping_tlv_targetfec_subtlv_rsvp_ipv6;
515 const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv4_t *lspping_tlv_targetfec_subtlv_l3vpn_ipv4;
516 const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv6_t *lspping_tlv_targetfec_subtlv_l3vpn_ipv6;
517 const struct lspping_tlv_targetfec_subtlv_l2vpn_endpt_t *lspping_tlv_targetfec_subtlv_l2vpn_endpt;
518 const struct lspping_tlv_targetfec_subtlv_fec_128_pw_old *lspping_tlv_targetfec_subtlv_l2vpn_vcid_old;
519 const struct lspping_tlv_targetfec_subtlv_fec_128_pw *lspping_tlv_targetfec_subtlv_l2vpn_vcid;
520 const struct lspping_tlv_targetfec_subtlv_bgp_ipv4_t *lspping_tlv_targetfec_subtlv_bgp_ipv4;
521 const struct lspping_tlv_targetfec_subtlv_bgp_ipv6_t *lspping_tlv_targetfec_subtlv_bgp_ipv6;
522 } subtlv_ptr;
523
524 tptr=pptr;
525 lspping_com_header = (const struct lspping_common_header *)pptr;
526 if (len < sizeof(const struct lspping_common_header))
527 goto tooshort;
528 ND_TCHECK(*lspping_com_header);
529
530 /*
531 * Sanity checking of the header.
532 */
533 if (EXTRACT_16BITS(&lspping_com_header->version[0]) != LSPPING_VERSION) {
534 ND_PRINT((ndo, "LSP-PING version %u packet not supported",
535 EXTRACT_16BITS(&lspping_com_header->version[0])));
536 return;
537 }
538
539 /* in non-verbose mode just lets print the basic Message Type*/
540 if (ndo->ndo_vflag < 1) {
541 ND_PRINT((ndo, "LSP-PINGv%u, %s, seq %u, length: %u",
542 EXTRACT_16BITS(&lspping_com_header->version[0]),
543 tok2str(lspping_msg_type_values, "unknown (%u)",lspping_com_header->msg_type),
544 EXTRACT_32BITS(lspping_com_header->seq_number),
545 len));
546 return;
547 }
548
549 /* ok they seem to want to know everything - lets fully decode it */
550
551 tlen=len;
552
553 ND_PRINT((ndo, "\n\tLSP-PINGv%u, msg-type: %s (%u), length: %u\n\t reply-mode: %s (%u)",
554 EXTRACT_16BITS(&lspping_com_header->version[0]),
555 tok2str(lspping_msg_type_values, "unknown",lspping_com_header->msg_type),
556 lspping_com_header->msg_type,
557 len,
558 tok2str(lspping_reply_mode_values, "unknown",lspping_com_header->reply_mode),
559 lspping_com_header->reply_mode));
560
561 /*
562 * the following return codes require that the subcode is attached
563 * at the end of the translated token output
564 */
565 if (lspping_com_header->return_code == 3 ||
566 lspping_com_header->return_code == 4 ||
567 lspping_com_header->return_code == 8 ||
568 lspping_com_header->return_code == 10 ||
569 lspping_com_header->return_code == 11 ||
570 lspping_com_header->return_code == 12 )
571 ND_PRINT((ndo, "\n\t Return Code: %s %u (%u)\n\t Return Subcode: (%u)",
572 tok2str(lspping_return_code_values, "unknown",lspping_com_header->return_code),
573 lspping_com_header->return_subcode,
574 lspping_com_header->return_code,
575 lspping_com_header->return_subcode));
576 else
577 ND_PRINT((ndo, "\n\t Return Code: %s (%u)\n\t Return Subcode: (%u)",
578 tok2str(lspping_return_code_values, "unknown",lspping_com_header->return_code),
579 lspping_com_header->return_code,
580 lspping_com_header->return_subcode));
581
582 ND_PRINT((ndo, "\n\t Sender Handle: 0x%08x, Sequence: %u",
583 EXTRACT_32BITS(lspping_com_header->sender_handle),
584 EXTRACT_32BITS(lspping_com_header->seq_number)));
585
586 timestamp.tv_sec=EXTRACT_32BITS(lspping_com_header->ts_sent_sec);
587 timestamp.tv_usec=EXTRACT_32BITS(lspping_com_header->ts_sent_usec);
588 ND_PRINT((ndo, "\n\t Sender Timestamp: "));
589 ts_print(ndo, ×tamp);
590
591 timestamp.tv_sec=EXTRACT_32BITS(lspping_com_header->ts_rcvd_sec);
592 timestamp.tv_usec=EXTRACT_32BITS(lspping_com_header->ts_rcvd_usec);
593 ND_PRINT((ndo, "Receiver Timestamp: "));
594 if ((timestamp.tv_sec != 0) && (timestamp.tv_usec != 0))
595 ts_print(ndo, ×tamp);
596 else
597 ND_PRINT((ndo, "no timestamp"));
598
599 tptr+=sizeof(const struct lspping_common_header);
600 tlen-=sizeof(const struct lspping_common_header);
601
602 while (tlen != 0) {
603 /* Does the TLV go past the end of the packet? */
604 if (tlen < sizeof(struct lspping_tlv_header))
605 goto tooshort;
606
607 /* did we capture enough for fully decoding the tlv header ? */
608 ND_TCHECK2(*tptr, sizeof(struct lspping_tlv_header));
609
610 lspping_tlv_header = (const struct lspping_tlv_header *)tptr;
611 lspping_tlv_type=EXTRACT_16BITS(lspping_tlv_header->type);
612 lspping_tlv_len=EXTRACT_16BITS(lspping_tlv_header->length);
613
614 ND_PRINT((ndo, "\n\t %s TLV (%u), length: %u",
615 tok2str(lspping_tlv_values,
616 "Unknown",
617 lspping_tlv_type),
618 lspping_tlv_type,
619 lspping_tlv_len));
620
621 /* some little sanity checking */
622 if (lspping_tlv_len == 0) {
623 tptr+=sizeof(struct lspping_tlv_header);
624 tlen-=sizeof(struct lspping_tlv_header);
625 continue; /* no value to dissect */
626 }
627
628 tlv_tptr=tptr+sizeof(struct lspping_tlv_header);
629 tlv_tlen=lspping_tlv_len; /* header not included -> no adjustment */
630
631 /* Does the TLV go past the end of the packet? */
632 if (tlen < lspping_tlv_len+sizeof(struct lspping_tlv_header))
633 goto tooshort;
634 /* did we capture enough for fully decoding the tlv ? */
635 ND_TCHECK2(*tlv_tptr, lspping_tlv_len);
636 tlv_hexdump=FALSE;
637
638 switch(lspping_tlv_type) {
639 case LSPPING_TLV_TARGET_FEC_STACK:
640 while (tlv_tlen != 0) {
641 /* Does the subTLV header go past the end of the TLV? */
642 if (tlv_tlen < sizeof(struct lspping_tlv_header)) {
643 ND_PRINT((ndo, "\n\t TLV is too short"));
644 tlv_hexdump = TRUE;
645 goto tlv_tooshort;
646 }
647 /* did we capture enough for fully decoding the subtlv header ? */
648 ND_TCHECK2(*tlv_tptr, sizeof(struct lspping_tlv_header));
649 subtlv_hexdump=FALSE;
650
651 lspping_subtlv_header = (const struct lspping_tlv_header *)tlv_tptr;
652 lspping_subtlv_type=EXTRACT_16BITS(lspping_subtlv_header->type);
653 lspping_subtlv_len=EXTRACT_16BITS(lspping_subtlv_header->length);
654 subtlv_tptr=tlv_tptr+sizeof(struct lspping_tlv_header);
655
656 /* Does the subTLV go past the end of the TLV? */
657 if (tlv_tlen < lspping_subtlv_len+sizeof(struct lspping_tlv_header)) {
658 ND_PRINT((ndo, "\n\t TLV is too short"));
659 tlv_hexdump = TRUE;
660 goto tlv_tooshort;
661 }
662
663 /* Did we capture enough for fully decoding the subTLV? */
664 ND_TCHECK2(*subtlv_tptr, lspping_subtlv_len);
665
666 ND_PRINT((ndo, "\n\t %s subTLV (%u), length: %u",
667 tok2str(lspping_tlvtargetfec_subtlv_values,
668 "Unknown",
669 lspping_subtlv_type),
670 lspping_subtlv_type,
671 lspping_subtlv_len));
672
673 switch(lspping_subtlv_type) {
674
675 case LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV4:
676 /* Is the subTLV length correct? */
677 if (lspping_subtlv_len != 5) {
678 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 5"));
679 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
680 } else {
681 subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv4 = \
682 (const struct lspping_tlv_targetfec_subtlv_ldp_ipv4_t *)subtlv_tptr;
683 ND_PRINT((ndo, "\n\t %s/%u",
684 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv4->prefix),
685 subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv4->prefix_len));
686 }
687 break;
688
689 case LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV6:
690 /* Is the subTLV length correct? */
691 if (lspping_subtlv_len != 17) {
692 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 17"));
693 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
694 } else {
695 subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv6 = \
696 (const struct lspping_tlv_targetfec_subtlv_ldp_ipv6_t *)subtlv_tptr;
697 ND_PRINT((ndo, "\n\t %s/%u",
698 ip6addr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv6->prefix),
699 subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv6->prefix_len));
700 }
701 break;
702
703 case LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV4:
704 /* Is the subTLV length correct? */
705 if (lspping_subtlv_len != 5) {
706 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 5"));
707 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
708 } else {
709 subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv4 = \
710 (const struct lspping_tlv_targetfec_subtlv_bgp_ipv4_t *)subtlv_tptr;
711 ND_PRINT((ndo, "\n\t %s/%u",
712 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv4->prefix),
713 subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv4->prefix_len));
714 }
715 break;
716
717 case LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV6:
718 /* Is the subTLV length correct? */
719 if (lspping_subtlv_len != 17) {
720 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 17"));
721 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
722 } else {
723 subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv6 = \
724 (const struct lspping_tlv_targetfec_subtlv_bgp_ipv6_t *)subtlv_tptr;
725 ND_PRINT((ndo, "\n\t %s/%u",
726 ip6addr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv6->prefix),
727 subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv6->prefix_len));
728 }
729 break;
730
731 case LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV4:
732 /* Is the subTLV length correct? */
733 if (lspping_subtlv_len != 20) {
734 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 20"));
735 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
736 } else {
737 subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4 = \
738 (const struct lspping_tlv_targetfec_subtlv_rsvp_ipv4_t *)subtlv_tptr;
739 ND_PRINT((ndo, "\n\t tunnel end-point %s, tunnel sender %s, lsp-id 0x%04x" \
740 "\n\t tunnel-id 0x%04x, extended tunnel-id %s",
741 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->tunnel_endpoint),
742 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->tunnel_sender),
743 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->lsp_id),
744 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->tunnel_id),
745 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->extended_tunnel_id)));
746 }
747 break;
748
749 case LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV6:
750 /* Is the subTLV length correct? */
751 if (lspping_subtlv_len != 56) {
752 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 56"));
753 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
754 } else {
755 subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6 = \
756 (const struct lspping_tlv_targetfec_subtlv_rsvp_ipv6_t *)subtlv_tptr;
757 ND_PRINT((ndo, "\n\t tunnel end-point %s, tunnel sender %s, lsp-id 0x%04x" \
758 "\n\t tunnel-id 0x%04x, extended tunnel-id %s",
759 ip6addr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->tunnel_endpoint),
760 ip6addr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->tunnel_sender),
761 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->lsp_id),
762 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->tunnel_id),
763 ip6addr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->extended_tunnel_id)));
764 }
765 break;
766
767 case LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV4:
768 /* Is the subTLV length correct? */
769 if (lspping_subtlv_len != 13) {
770 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 13"));
771 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
772 } else {
773 subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4 = \
774 (const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv4_t *)subtlv_tptr;
775 ND_PRINT((ndo, "\n\t RD: %s, %s/%u",
776 bgp_vpn_rd_print(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4->rd),
777 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4->prefix),
778 subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4->prefix_len));
779 }
780 break;
781
782 case LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV6:
783 /* Is the subTLV length correct? */
784 if (lspping_subtlv_len != 25) {
785 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 25"));
786 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
787 } else {
788 subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6 = \
789 (const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv6_t *)subtlv_tptr;
790 ND_PRINT((ndo, "\n\t RD: %s, %s/%u",
791 bgp_vpn_rd_print(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6->rd),
792 ip6addr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6->prefix),
793 subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6->prefix_len));
794 }
795 break;
796
797 case LSPPING_TLV_TARGETFEC_SUBTLV_L2VPN_ENDPT:
798 /* Is the subTLV length correct? */
799 if (lspping_subtlv_len != 14) {
800 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 14"));
801 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
802 } else {
803 subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt = \
804 (const struct lspping_tlv_targetfec_subtlv_l2vpn_endpt_t *)subtlv_tptr;
805 ND_PRINT((ndo, "\n\t RD: %s, Sender VE ID: %u, Receiver VE ID: %u" \
806 "\n\t Encapsulation Type: %s (%u)",
807 bgp_vpn_rd_print(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->rd),
808 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->sender_ve_id),
809 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->receiver_ve_id),
810 tok2str(mpls_pw_types_values,
811 "unknown",
812 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->encapsulation)),
813 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->encapsulation)));
814 }
815 break;
816
817 /* the old L2VPN VCID subTLV does not have support for the sender field */
818 case LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW_OLD:
819 /* Is the subTLV length correct? */
820 if (lspping_subtlv_len != 10) {
821 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 10"));
822 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
823 } else {
824 subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old = \
825 (const struct lspping_tlv_targetfec_subtlv_fec_128_pw_old *)subtlv_tptr;
826 ND_PRINT((ndo, "\n\t Remote PE: %s" \
827 "\n\t PW ID: 0x%08x, PW Type: %s (%u)",
828 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->remote_pe_address),
829 EXTRACT_32BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->pw_id),
830 tok2str(mpls_pw_types_values,
831 "unknown",
832 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->pw_type)),
833 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->pw_type)));
834 }
835 break;
836
837 case LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW:
838 /* Is the subTLV length correct? */
839 if (lspping_subtlv_len != 14) {
840 ND_PRINT((ndo, "\n\t invalid subTLV length, should be 14"));
841 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
842 } else {
843 subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid = \
844 (const struct lspping_tlv_targetfec_subtlv_fec_128_pw *)subtlv_tptr;
845 ND_PRINT((ndo, "\n\t Sender PE: %s, Remote PE: %s" \
846 "\n\t PW ID: 0x%08x, PW Type: %s (%u)",
847 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->sender_pe_address),
848 ipaddr_string(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->remote_pe_address),
849 EXTRACT_32BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->pw_id),
850 tok2str(mpls_pw_types_values,
851 "unknown",
852 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->pw_type)),
853 EXTRACT_16BITS(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->pw_type)));
854 }
855 break;
856
857 default:
858 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */
859 break;
860 }
861 /* do we want to see an additionally subtlv hexdump ? */
862 if (ndo->ndo_vflag > 1 || subtlv_hexdump==TRUE)
863 print_unknown_data(ndo, tlv_tptr+sizeof(struct lspping_tlv_header), \
864 "\n\t ",
865 lspping_subtlv_len);
866
867 /* All subTLVs are aligned to four octet boundary */
868 if (lspping_subtlv_len % 4) {
869 lspping_subtlv_len += 4 - (lspping_subtlv_len % 4);
870 /* Does the subTLV, including padding, go past the end of the TLV? */
871 if (tlv_tlen < lspping_subtlv_len+sizeof(struct lspping_tlv_header)) {
872 ND_PRINT((ndo, "\n\t\t TLV is too short"));
873 return;
874 }
875 }
876 tlv_tptr+=lspping_subtlv_len;
877 tlv_tlen-=lspping_subtlv_len+sizeof(struct lspping_tlv_header);
878 }
879 break;
880
881 case LSPPING_TLV_DOWNSTREAM_MAPPING:
882 /* Does the header go past the end of the TLV? */
883 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_t)) {
884 ND_PRINT((ndo, "\n\t TLV is too short"));
885 tlv_hexdump = TRUE;
886 goto tlv_tooshort;
887 }
888 /* Did we capture enough to get the address family? */
889 ND_TCHECK2(*tlv_tptr, sizeof(struct lspping_tlv_downstream_map_t));
890
891 tlv_ptr.lspping_tlv_downstream_map= \
892 (const struct lspping_tlv_downstream_map_t *)tlv_tptr;
893
894 /* that strange thing with the downstream map TLV is that until now
895 * we do not know if its IPv4 or IPv6 or is unnumbered; after
896 * we find the address-type, we recast the tlv_tptr and move on. */
897
898 ND_PRINT((ndo, "\n\t MTU: %u, Address-Type: %s (%u)",
899 EXTRACT_16BITS(tlv_ptr.lspping_tlv_downstream_map->mtu),
900 tok2str(lspping_tlv_downstream_addr_values,
901 "unknown",
902 tlv_ptr.lspping_tlv_downstream_map->address_type),
903 tlv_ptr.lspping_tlv_downstream_map->address_type));
904
905 switch(tlv_ptr.lspping_tlv_downstream_map->address_type) {
906
907 case LSPPING_AFI_IPV4:
908 /* Does the data go past the end of the TLV? */
909 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv4_t)) {
910 ND_PRINT((ndo, "\n\t TLV is too short"));
911 tlv_hexdump = TRUE;
912 goto tlv_tooshort;
913 }
914 /* Did we capture enough for this part of the TLV? */
915 ND_TCHECK2(*tlv_tptr, sizeof(struct lspping_tlv_downstream_map_ipv4_t));
916
917 tlv_ptr.lspping_tlv_downstream_map_ipv4= \
918 (const struct lspping_tlv_downstream_map_ipv4_t *)tlv_tptr;
919 ND_PRINT((ndo, "\n\t Downstream IP: %s" \
920 "\n\t Downstream Interface IP: %s",
921 ipaddr_string(ndo, tlv_ptr.lspping_tlv_downstream_map_ipv4->downstream_ip),
922 ipaddr_string(ndo, tlv_ptr.lspping_tlv_downstream_map_ipv4->downstream_interface)));
923 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv4_t);
924 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv4_t);
925 break;
926 case LSPPING_AFI_IPV4_UNMB:
927 /* Does the data go past the end of the TLV? */
928 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t)) {
929 ND_PRINT((ndo, "\n\t TLV is too short"));
930 tlv_hexdump = TRUE;
931 goto tlv_tooshort;
932 }
933 /* Did we capture enough for this part of the TLV? */
934 ND_TCHECK2(*tlv_tptr, sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t));
935
936 tlv_ptr.lspping_tlv_downstream_map_ipv4_unmb= \
937 (const struct lspping_tlv_downstream_map_ipv4_unmb_t *)tlv_tptr;
938 ND_PRINT((ndo, "\n\t Downstream IP: %s" \
939 "\n\t Downstream Interface Index: 0x%08x",
940 ipaddr_string(ndo, tlv_ptr.lspping_tlv_downstream_map_ipv4_unmb->downstream_ip),
941 EXTRACT_32BITS(tlv_ptr.lspping_tlv_downstream_map_ipv4_unmb->downstream_interface)));
942 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t);
943 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t);
944 break;
945 case LSPPING_AFI_IPV6:
946 /* Does the data go past the end of the TLV? */
947 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv6_t)) {
948 ND_PRINT((ndo, "\n\t TLV is too short"));
949 tlv_hexdump = TRUE;
950 goto tlv_tooshort;
951 }
952 /* Did we capture enough for this part of the TLV? */
953 ND_TCHECK2(*tlv_tptr, sizeof(struct lspping_tlv_downstream_map_ipv6_t));
954
955 tlv_ptr.lspping_tlv_downstream_map_ipv6= \
956 (const struct lspping_tlv_downstream_map_ipv6_t *)tlv_tptr;
957 ND_PRINT((ndo, "\n\t Downstream IP: %s" \
958 "\n\t Downstream Interface IP: %s",
959 ip6addr_string(ndo, tlv_ptr.lspping_tlv_downstream_map_ipv6->downstream_ip),
960 ip6addr_string(ndo, tlv_ptr.lspping_tlv_downstream_map_ipv6->downstream_interface)));
961 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv6_t);
962 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv6_t);
963 break;
964 case LSPPING_AFI_IPV6_UNMB:
965 /* Does the data go past the end of the TLV? */
966 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t)) {
967 ND_PRINT((ndo, "\n\t TLV is too short"));
968 tlv_hexdump = TRUE;
969 goto tlv_tooshort;
970 }
971 /* Did we capture enough for this part of the TLV? */
972 ND_TCHECK2(*tlv_tptr, sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t));
973
974 tlv_ptr.lspping_tlv_downstream_map_ipv6_unmb= \
975 (const struct lspping_tlv_downstream_map_ipv6_unmb_t *)tlv_tptr;
976 ND_PRINT((ndo, "\n\t Downstream IP: %s" \
977 "\n\t Downstream Interface Index: 0x%08x",
978 ip6addr_string(ndo, tlv_ptr.lspping_tlv_downstream_map_ipv6_unmb->downstream_ip),
979 EXTRACT_32BITS(tlv_ptr.lspping_tlv_downstream_map_ipv6_unmb->downstream_interface)));
980 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t);
981 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t);
982 break;
983
984 default:
985 /* should not happen ! - no error message - tok2str() has barked already */
986 break;
987 }
988
989 /* Does the data go past the end of the TLV? */
990 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_info_t)) {
991 ND_PRINT((ndo, "\n\t TLV is too short"));
992 tlv_hexdump = TRUE;
993 goto tlv_tooshort;
994 }
995 /* Did we capture enough for this part of the TLV? */
996 ND_TCHECK2(*tlv_tptr, sizeof(struct lspping_tlv_downstream_map_info_t));
997
998 tlv_ptr.lspping_tlv_downstream_map_info= \
999 (const struct lspping_tlv_downstream_map_info_t *)tlv_tptr;
1000
1001 /* FIXME add hash-key type, depth limit, multipath processing */
1002
1003 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_info_t);
1004 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_info_t);
1005
1006 /* FIXME print downstream labels */
1007
1008 tlv_hexdump=TRUE; /* dump the TLV until code complete */
1009
1010 break;
1011
1012 case LSPPING_TLV_BFD_DISCRIMINATOR:
1013 if (tlv_tlen < LSPPING_TLV_BFD_DISCRIMINATOR_LEN) {
1014 ND_PRINT((ndo, "\n\t TLV is too short"));
1015 tlv_hexdump = TRUE;
1016 goto tlv_tooshort;
1017 } else {
1018 ND_TCHECK2(*tptr, LSPPING_TLV_BFD_DISCRIMINATOR_LEN);
1019 ND_PRINT((ndo, "\n\t BFD Discriminator 0x%08x", EXTRACT_32BITS(tptr)));
1020 }
1021 break;
1022
1023 case LSPPING_TLV_VENDOR_ENTERPRISE:
1024 {
1025 uint32_t vendor_id;
1026
1027 if (tlv_tlen < LSPPING_TLV_VENDOR_ENTERPRISE_LEN) {
1028 ND_PRINT((ndo, "\n\t TLV is too short"));
1029 tlv_hexdump = TRUE;
1030 goto tlv_tooshort;
1031 } else {
1032 ND_TCHECK2(*tptr, LSPPING_TLV_VENDOR_ENTERPRISE_LEN);
1033 vendor_id = EXTRACT_32BITS(tlv_tptr);
1034 ND_PRINT((ndo, "\n\t Vendor: %s (0x%04x)",
1035 tok2str(smi_values, "Unknown", vendor_id),
1036 vendor_id));
1037 }
1038 }
1039 break;
1040
1041 /*
1042 * FIXME those are the defined TLVs that lack a decoder
1043 * you are welcome to contribute code ;-)
1044 */
1045 case LSPPING_TLV_PAD:
1046 case LSPPING_TLV_ERROR_CODE:
1047 case LSPPING_TLV_VENDOR_PRIVATE:
1048
1049 default:
1050 if (ndo->ndo_vflag <= 1)
1051 print_unknown_data(ndo, tlv_tptr, "\n\t ", tlv_tlen);
1052 break;
1053 }
1054 /* do we want to see an additionally tlv hexdump ? */
1055 tlv_tooshort:
1056 if (ndo->ndo_vflag > 1 || tlv_hexdump==TRUE)
1057 print_unknown_data(ndo, tptr+sizeof(struct lspping_tlv_header), "\n\t ",
1058 lspping_tlv_len);
1059
1060
1061 /* All TLVs are aligned to four octet boundary */
1062 if (lspping_tlv_len % 4) {
1063 lspping_tlv_len += (4 - lspping_tlv_len % 4);
1064 /* Does the TLV, including padding, go past the end of the packet? */
1065 if (tlen < lspping_tlv_len+sizeof(struct lspping_tlv_header))
1066 goto tooshort;
1067 }
1068
1069 tptr+=lspping_tlv_len+sizeof(struct lspping_tlv_header);
1070 tlen-=lspping_tlv_len+sizeof(struct lspping_tlv_header);
1071 }
1072 return;
1073 tooshort:
1074 ND_PRINT((ndo, "\n\t\t packet is too short"));
1075 return;
1076 trunc:
1077 ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
1078 return;
1079 }
1080 /*
1081 * Local Variables:
1082 * c-style: whitesmith
1083 * c-basic-offset: 8
1084 * End:
1085 */
1086