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gre: add support for MikroTik Ethernet-over-IP hack.
[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@gredler.at)
14 */
15
16 /* \summary: MPLS LSP PING printer */
17
18 /* specification: RFC 4379 */
19
20 #ifdef HAVE_CONFIG_H
21 #include <config.h>
22 #endif
23
24 #include "netdissect-stdinc.h"
25
26 #define ND_LONGJMP_FROM_TCHECK
27 #include "netdissect.h"
28 #include "extract.h"
29 #include "addrtoname.h"
30 #include "ntp.h"
31
32 #include "l2vpn.h"
33 #include "oui.h"
34
35
36 /*
37 * LSPPING common header
38 *
39 * 0 1 2 3
40 * 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
41 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
42 * | Version Number | Must Be Zero |
43 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
44 * | Message Type | Reply mode | Return Code | Return Subcode|
45 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
46 * | Sender's Handle |
47 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
48 * | Sequence Number |
49 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
50 * | TimeStamp Sent (seconds) |
51 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
52 * | TimeStamp Sent (microseconds) |
53 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
54 * | TimeStamp Received (seconds) |
55 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
56 * | TimeStamp Received (microseconds) |
57 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
58 * | TLVs ... |
59 * . .
60 * . .
61 * . .
62 */
63
64 struct lspping_common_header {
65 nd_uint16_t version;
66 nd_uint16_t global_flags;
67 nd_uint8_t msg_type;
68 nd_uint8_t reply_mode;
69 nd_uint8_t return_code;
70 nd_uint8_t return_subcode;
71 nd_uint32_t sender_handle;
72 nd_uint32_t seq_number;
73 struct l_fixedpt ts_sent;
74 struct l_fixedpt ts_rcvd;
75 };
76
77 #define LSPPING_VERSION 1
78
79 static const struct tok lspping_msg_type_values[] = {
80 { 1, "MPLS Echo Request"},
81 { 2, "MPLS Echo Reply"},
82 { 0, NULL}
83 };
84
85 static const struct tok lspping_reply_mode_values[] = {
86 { 1, "Do not reply"},
87 { 2, "Reply via an IPv4/IPv6 UDP packet"},
88 { 3, "Reply via an IPv4/IPv6 UDP packet with Router Alert"},
89 { 4, "Reply via application level control channel"},
90 { 0, NULL}
91 };
92
93 static const struct tok lspping_return_code_values[] = {
94 { 0, "No return code or return code contained in the Error Code TLV"},
95 { 1, "Malformed echo request received"},
96 { 2, "One or more of the TLVs was not understood"},
97 { 3, "Replying router is an egress for the FEC at stack depth"},
98 { 4, "Replying router has no mapping for the FEC at stack depth"},
99 { 5, "Reserved"},
100 { 6, "Reserved"},
101 { 7, "Reserved"},
102 { 8, "Label switched at stack-depth"},
103 { 9, "Label switched but no MPLS forwarding at stack-depth"},
104 { 10, "Mapping for this FEC is not the given label at stack depth"},
105 { 11, "No label entry at stack-depth"},
106 { 12, "Protocol not associated with interface at FEC stack depth"},
107 { 13, "Premature termination of ping due to label stack shrinking to a single label"},
108 { 0, NULL},
109 };
110
111
112 /*
113 * LSPPING TLV header
114 * 0 1 2 3
115 * 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
116 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
117 * | Type | Length |
118 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
119 * | Value |
120 * . .
121 * . .
122 * . .
123 * | |
124 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
125 */
126
127 struct lspping_tlv_header {
128 nd_uint16_t type;
129 nd_uint16_t length;
130 };
131
132 #define LSPPING_TLV_TARGET_FEC_STACK 1
133 #define LSPPING_TLV_DOWNSTREAM_MAPPING 2
134 #define LSPPING_TLV_PAD 3
135 /* not assigned 4 */
136 #define LSPPING_TLV_VENDOR_ENTERPRISE 5
137 #define LSPPING_TLV_VENDOR_ENTERPRISE_LEN 4
138 /* not assigned 6 */
139 #define LSPPING_TLV_INTERFACE_LABEL_STACK 7
140 /* not assigned 8 */
141 #define LSPPING_TLV_ERROR_CODE 9
142 #define LSPPING_TLV_REPLY_TOS_BYTE 10
143 #define LSPPING_TLV_BFD_DISCRIMINATOR 15 /* draft-ietf-bfd-mpls-02 */
144 #define LSPPING_TLV_BFD_DISCRIMINATOR_LEN 4
145 #define LSPPING_TLV_VENDOR_PRIVATE 0xfc00
146
147 static const struct tok lspping_tlv_values[] = {
148 { LSPPING_TLV_TARGET_FEC_STACK, "Target FEC Stack" },
149 { LSPPING_TLV_DOWNSTREAM_MAPPING, "Downstream Mapping" },
150 { LSPPING_TLV_PAD, "Pad" },
151 { LSPPING_TLV_ERROR_CODE, "Error Code" },
152 { LSPPING_TLV_VENDOR_ENTERPRISE, "Vendor Enterprise Code" },
153 { LSPPING_TLV_INTERFACE_LABEL_STACK, "Interface Label Stack" },
154 { LSPPING_TLV_REPLY_TOS_BYTE, "Reply TOS Byte" },
155 { LSPPING_TLV_BFD_DISCRIMINATOR, "BFD Discriminator" },
156 { LSPPING_TLV_VENDOR_PRIVATE, "Vendor Private Code" },
157 { 0, NULL}
158 };
159
160 #define LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV4 1
161 #define LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV6 2
162 #define LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV4 3
163 #define LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV6 4
164 /* not assigned 5 */
165 #define LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV4 6
166 #define LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV6 7
167 #define LSPPING_TLV_TARGETFEC_SUBTLV_L2VPN_ENDPT 8
168 #define LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW_OLD 9
169 #define LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW 10
170 #define LSPPING_TLV_TARGETFEC_SUBTLV_FEC_129_PW 11
171 #define LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV4 12
172 #define LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV6 13
173 #define LSPPING_TLV_TARGETFEC_SUBTLV_GENERIC_IPV4 14
174 #define LSPPING_TLV_TARGETFEC_SUBTLV_GENERIC_IPV6 15
175 #define LSPPING_TLV_TARGETFEC_SUBTLV_NIL_FEC 16
176
177 static const struct tok lspping_tlvtargetfec_subtlv_values[] = {
178 { LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV4, "LDP IPv4 prefix"},
179 { LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV6, "LDP IPv6 prefix"},
180 { LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV4, "RSVP IPv4 Session Query"},
181 { LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV6, "RSVP IPv6 Session Query"},
182 { 5, "Reserved"},
183 { LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV4, "VPN IPv4 prefix"},
184 { LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV6, "VPN IPv6 prefix"},
185 { LSPPING_TLV_TARGETFEC_SUBTLV_L2VPN_ENDPT, "L2 VPN endpoint"},
186 { LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW_OLD, "FEC 128 pseudowire (old)"},
187 { LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW, "FEC 128 pseudowire"},
188 { LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV4, "BGP labeled IPv4 prefix"},
189 { LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV6, "BGP labeled IPv6 prefix"},
190 { 0, NULL}
191 };
192
193 /*
194 * 0 1 2 3
195 * 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
196 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
197 * | IPv4 prefix |
198 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
199 * | Prefix Length | Must Be Zero |
200 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
201 */
202 struct lspping_tlv_targetfec_subtlv_ldp_ipv4_t {
203 nd_ipv4 prefix;
204 nd_uint8_t prefix_len;
205 };
206
207 /*
208 * 0 1 2 3
209 * 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
210 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
211 * | IPv6 prefix |
212 * | (16 octets) |
213 * | |
214 * | |
215 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
216 * | Prefix Length | Must Be Zero |
217 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
218 */
219 struct lspping_tlv_targetfec_subtlv_ldp_ipv6_t {
220 nd_ipv6 prefix;
221 nd_uint8_t prefix_len;
222 };
223
224 /*
225 * 0 1 2 3
226 * 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
227 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
228 * | IPv4 tunnel end point address |
229 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
230 * | Must Be Zero | Tunnel ID |
231 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
232 * | Extended Tunnel ID |
233 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
234 * | IPv4 tunnel sender address |
235 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
236 * | Must Be Zero | LSP ID |
237 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
238 */
239 struct lspping_tlv_targetfec_subtlv_rsvp_ipv4_t {
240 nd_ipv4 tunnel_endpoint;
241 nd_byte res[2];
242 nd_uint16_t tunnel_id;
243 nd_ipv4 extended_tunnel_id;
244 nd_ipv4 tunnel_sender;
245 nd_byte res2[2];
246 nd_uint16_t lsp_id;
247 };
248
249 /*
250 * 0 1 2 3
251 * 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
252 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
253 * | IPv6 tunnel end point address |
254 * | |
255 * | |
256 * | |
257 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
258 * | Must Be Zero | Tunnel ID |
259 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
260 * | Extended Tunnel ID |
261 * | |
262 * | |
263 * | |
264 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
265 * | IPv6 tunnel sender address |
266 * | |
267 * | |
268 * | |
269 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
270 * | Must Be Zero | LSP ID |
271 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
272 */
273 struct lspping_tlv_targetfec_subtlv_rsvp_ipv6_t {
274 nd_ipv6 tunnel_endpoint;
275 nd_byte res[2];
276 nd_uint16_t tunnel_id;
277 nd_ipv6 extended_tunnel_id;
278 nd_ipv6 tunnel_sender;
279 nd_byte res2[2];
280 nd_uint16_t lsp_id;
281 };
282
283 /*
284 * 0 1 2 3
285 * 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
286 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
287 * | Route Distinguisher |
288 * | (8 octets) |
289 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
290 * | IPv4 prefix |
291 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
292 * | Prefix Length | Must Be Zero |
293 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
294 */
295 struct lspping_tlv_targetfec_subtlv_l3vpn_ipv4_t {
296 nd_byte rd[8];
297 nd_ipv4 prefix;
298 nd_uint8_t prefix_len;
299 };
300
301 /*
302 * 0 1 2 3
303 * 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
304 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
305 * | Route Distinguisher |
306 * | (8 octets) |
307 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
308 * | IPv6 prefix |
309 * | (16 octets) |
310 * | |
311 * | |
312 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
313 * | Prefix Length | Must Be Zero |
314 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
315 */
316 struct lspping_tlv_targetfec_subtlv_l3vpn_ipv6_t {
317 nd_byte rd[8];
318 nd_ipv6 prefix;
319 nd_uint8_t prefix_len;
320 };
321
322 /*
323 * 0 1 2 3
324 * 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
325 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
326 * | Route Distinguisher |
327 * | (8 octets) |
328 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
329 * | Sender's VE ID | Receiver's VE ID |
330 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
331 * | Encapsulation Type | Must Be Zero |
332 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
333 * 0 1 2 3
334 */
335 struct lspping_tlv_targetfec_subtlv_l2vpn_endpt_t {
336 nd_byte rd[8];
337 nd_uint16_t sender_ve_id;
338 nd_uint16_t receiver_ve_id;
339 nd_uint16_t encapsulation;
340 };
341
342 /*
343 * 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
344 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
345 * | Remote PE Address |
346 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
347 * | PW ID |
348 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
349 * | PW Type | Must Be Zero |
350 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
351 */
352 struct lspping_tlv_targetfec_subtlv_fec_128_pw_old {
353 nd_ipv4 remote_pe_address;
354 nd_uint32_t pw_id;
355 nd_uint16_t pw_type;
356 };
357
358 /*
359 * 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
360 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
361 * | Sender's PE Address |
362 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
363 * | Remote PE Address |
364 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
365 * | PW ID |
366 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
367 * | PW Type | Must Be Zero |
368 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
369 */
370 struct lspping_tlv_targetfec_subtlv_fec_128_pw {
371 nd_ipv4 sender_pe_address;
372 nd_ipv4 remote_pe_address;
373 nd_uint32_t pw_id;
374 nd_uint16_t pw_type;
375 };
376
377 /*
378 * 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
379 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
380 * | IPv4 prefix |
381 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
382 * | Prefix Length | Must Be Zero |
383 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
384 */
385 struct lspping_tlv_targetfec_subtlv_bgp_ipv4_t {
386 nd_ipv4 prefix;
387 nd_uint8_t prefix_len;
388 };
389
390 /*
391 * 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
392 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
393 * | IPv6 prefix |
394 * | (16 octets) |
395 * | |
396 * | |
397 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
398 * | Prefix Length | Must Be Zero |
399 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
400 */
401 struct lspping_tlv_targetfec_subtlv_bgp_ipv6_t {
402 nd_ipv6 prefix;
403 nd_uint8_t prefix_len;
404 };
405
406 /*
407 * 0 1 2 3
408 * 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
409 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
410 * | MTU | Address Type | Resvd (SBZ) |
411 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
412 * | Downstream IP Address (4 or 16 octets) |
413 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
414 * | Downstream Interface Address (4 or 16 octets) |
415 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
416 * | Multipath Type| Depth Limit | Multipath Length |
417 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
418 * . .
419 * . (Multipath Information) .
420 * . .
421 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
422 * | Downstream Label | Protocol |
423 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
424 * . .
425 * . .
426 * . .
427 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
428 * | Downstream Label | Protocol |
429 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
430 */
431 /* Enough to get the address type */
432 struct lspping_tlv_downstream_map_t {
433 nd_uint16_t mtu;
434 nd_uint8_t address_type;
435 nd_uint8_t ds_flags;
436 };
437
438 struct lspping_tlv_downstream_map_ipv4_t {
439 nd_uint16_t mtu;
440 nd_uint8_t address_type;
441 nd_uint8_t ds_flags;
442 nd_ipv4 downstream_ip;
443 nd_ipv4 downstream_interface;
444 };
445
446 struct lspping_tlv_downstream_map_ipv4_unmb_t {
447 nd_uint16_t mtu;
448 nd_uint8_t address_type;
449 nd_uint8_t ds_flags;
450 nd_ipv4 downstream_ip;
451 nd_uint32_t downstream_interface;
452 };
453
454 struct lspping_tlv_downstream_map_ipv6_t {
455 nd_uint16_t mtu;
456 nd_uint8_t address_type;
457 nd_uint8_t ds_flags;
458 nd_ipv6 downstream_ip;
459 nd_ipv6 downstream_interface;
460 };
461
462 struct lspping_tlv_downstream_map_ipv6_unmb_t {
463 nd_uint16_t mtu;
464 nd_uint8_t address_type;
465 nd_uint8_t ds_flags;
466 nd_ipv6 downstream_ip;
467 nd_uint32_t downstream_interface;
468 };
469
470 struct lspping_tlv_downstream_map_info_t {
471 nd_uint8_t multipath_type;
472 nd_uint8_t depth_limit;
473 nd_uint16_t multipath_length;
474 };
475
476 #define LSPPING_AFI_IPV4 1
477 #define LSPPING_AFI_IPV4_UNMB 2
478 #define LSPPING_AFI_IPV6 3
479 #define LSPPING_AFI_IPV6_UNMB 4
480
481 static const struct tok lspping_tlv_downstream_addr_values[] = {
482 { LSPPING_AFI_IPV4, "IPv4"},
483 { LSPPING_AFI_IPV4_UNMB, "Unnumbered IPv4"},
484 { LSPPING_AFI_IPV6, "IPv6"},
485 { LSPPING_AFI_IPV6_UNMB, "IPv6"},
486 { 0, NULL}
487 };
488
489 void
490 lspping_print(netdissect_options *ndo,
491 const u_char *pptr, u_int len)
492 {
493 const struct lspping_common_header *lspping_com_header;
494 const struct lspping_tlv_header *lspping_tlv_header;
495 const struct lspping_tlv_header *lspping_subtlv_header;
496 const u_char *tptr,*tlv_tptr,*subtlv_tptr;
497 u_int return_code, return_subcode;
498 u_int tlen,lspping_tlv_len,lspping_tlv_type,tlv_tlen;
499 int tlv_hexdump,subtlv_hexdump;
500 u_int lspping_subtlv_len,lspping_subtlv_type;
501 uint32_t int_part, fraction;
502 u_int address_type;
503
504 union {
505 const struct lspping_tlv_downstream_map_t *lspping_tlv_downstream_map;
506 const struct lspping_tlv_downstream_map_ipv4_t *lspping_tlv_downstream_map_ipv4;
507 const struct lspping_tlv_downstream_map_ipv4_unmb_t *lspping_tlv_downstream_map_ipv4_unmb;
508 const struct lspping_tlv_downstream_map_ipv6_t *lspping_tlv_downstream_map_ipv6;
509 const struct lspping_tlv_downstream_map_ipv6_unmb_t *lspping_tlv_downstream_map_ipv6_unmb;
510 const struct lspping_tlv_downstream_map_info_t *lspping_tlv_downstream_map_info;
511 } tlv_ptr;
512
513 union {
514 const struct lspping_tlv_targetfec_subtlv_ldp_ipv4_t *lspping_tlv_targetfec_subtlv_ldp_ipv4;
515 const struct lspping_tlv_targetfec_subtlv_ldp_ipv6_t *lspping_tlv_targetfec_subtlv_ldp_ipv6;
516 const struct lspping_tlv_targetfec_subtlv_rsvp_ipv4_t *lspping_tlv_targetfec_subtlv_rsvp_ipv4;
517 const struct lspping_tlv_targetfec_subtlv_rsvp_ipv6_t *lspping_tlv_targetfec_subtlv_rsvp_ipv6;
518 const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv4_t *lspping_tlv_targetfec_subtlv_l3vpn_ipv4;
519 const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv6_t *lspping_tlv_targetfec_subtlv_l3vpn_ipv6;
520 const struct lspping_tlv_targetfec_subtlv_l2vpn_endpt_t *lspping_tlv_targetfec_subtlv_l2vpn_endpt;
521 const struct lspping_tlv_targetfec_subtlv_fec_128_pw_old *lspping_tlv_targetfec_subtlv_l2vpn_vcid_old;
522 const struct lspping_tlv_targetfec_subtlv_fec_128_pw *lspping_tlv_targetfec_subtlv_l2vpn_vcid;
523 const struct lspping_tlv_targetfec_subtlv_bgp_ipv4_t *lspping_tlv_targetfec_subtlv_bgp_ipv4;
524 const struct lspping_tlv_targetfec_subtlv_bgp_ipv6_t *lspping_tlv_targetfec_subtlv_bgp_ipv6;
525 } subtlv_ptr;
526
527 ndo->ndo_protocol = "lspping";
528 tptr=pptr;
529 lspping_com_header = (const struct lspping_common_header *)pptr;
530 if (len < sizeof(struct lspping_common_header))
531 goto tooshort;
532 ND_TCHECK_SIZE(lspping_com_header);
533
534 /*
535 * Sanity checking of the header.
536 */
537 if (GET_BE_U_2(lspping_com_header->version) != LSPPING_VERSION) {
538 ND_PRINT("LSP-PING version %u packet not supported",
539 GET_BE_U_2(lspping_com_header->version));
540 return;
541 }
542
543 /* in non-verbose mode just lets print the basic Message Type*/
544 if (ndo->ndo_vflag < 1) {
545 ND_PRINT("LSP-PINGv%u, %s, seq %u, length: %u",
546 GET_BE_U_2(lspping_com_header->version),
547 tok2str(lspping_msg_type_values, "unknown (%u)",GET_U_1(lspping_com_header->msg_type)),
548 GET_BE_U_4(lspping_com_header->seq_number),
549 len);
550 return;
551 }
552
553 /* ok they seem to want to know everything - lets fully decode it */
554
555 tlen=len;
556
557 ND_PRINT("\n\tLSP-PINGv%u, msg-type: %s (%u), length: %u\n\t reply-mode: %s (%u)",
558 GET_BE_U_2(lspping_com_header->version),
559 tok2str(lspping_msg_type_values, "unknown",GET_U_1(lspping_com_header->msg_type)),
560 GET_U_1(lspping_com_header->msg_type),
561 len,
562 tok2str(lspping_reply_mode_values, "unknown",GET_U_1(lspping_com_header->reply_mode)),
563 GET_U_1(lspping_com_header->reply_mode));
564
565 /*
566 * the following return codes require that the subcode is attached
567 * at the end of the translated token output
568 */
569 return_code = GET_U_1(lspping_com_header->return_code);
570 return_subcode = GET_U_1(lspping_com_header->return_subcode);
571 if (return_code == 3 ||
572 return_code == 4 ||
573 return_code == 8 ||
574 return_code == 10 ||
575 return_code == 11 ||
576 return_code == 12 )
577 ND_PRINT("\n\t Return Code: %s %u (%u)\n\t Return Subcode: (%u)",
578 tok2str(lspping_return_code_values, "unknown",return_code),
579 return_subcode,
580 return_code,
581 return_subcode);
582 else
583 ND_PRINT("\n\t Return Code: %s (%u)\n\t Return Subcode: (%u)",
584 tok2str(lspping_return_code_values, "unknown",return_code),
585 return_code,
586 return_subcode);
587
588 ND_PRINT("\n\t Sender Handle: 0x%08x, Sequence: %u",
589 GET_BE_U_4(lspping_com_header->sender_handle),
590 GET_BE_U_4(lspping_com_header->seq_number));
591
592 ND_PRINT("\n\t Sender Timestamp: ");
593 p_ntp_time(ndo, &lspping_com_header->ts_sent);
594 ND_PRINT(" ");
595
596 int_part=GET_BE_U_4(lspping_com_header->ts_rcvd.int_part);
597 fraction=GET_BE_U_4(lspping_com_header->ts_rcvd.fraction);
598 ND_PRINT("Receiver Timestamp: ");
599 if (! (int_part == 0 && fraction == 0))
600 p_ntp_time(ndo, &lspping_com_header->ts_rcvd);
601 else
602 ND_PRINT("no timestamp");
603
604 tptr+=sizeof(struct lspping_common_header);
605 tlen-=sizeof(struct lspping_common_header);
606
607 while (tlen != 0) {
608 /* Does the TLV go past the end of the packet? */
609 if (tlen < sizeof(struct lspping_tlv_header))
610 goto tooshort;
611
612 lspping_tlv_header = (const struct lspping_tlv_header *)tptr;
613 lspping_tlv_type=GET_BE_U_2(lspping_tlv_header->type);
614 lspping_tlv_len=GET_BE_U_2(lspping_tlv_header->length);
615
616 ND_PRINT("\n\t %s TLV (%u), length: %u",
617 tok2str(lspping_tlv_values,
618 "Unknown",
619 lspping_tlv_type),
620 lspping_tlv_type,
621 lspping_tlv_len);
622
623 /* some little sanity checking */
624 if (lspping_tlv_len == 0) {
625 tptr+=sizeof(struct lspping_tlv_header);
626 tlen-=sizeof(struct lspping_tlv_header);
627 continue; /* no value to dissect */
628 }
629
630 tlv_tptr=tptr+sizeof(struct lspping_tlv_header);
631 tlv_tlen=lspping_tlv_len; /* header not included -> no adjustment */
632
633 /* Does the TLV go past the end of the packet? */
634 if (tlen < lspping_tlv_len+sizeof(struct lspping_tlv_header))
635 goto tooshort;
636 /* did we capture enough for fully decoding the tlv ? */
637 ND_TCHECK_LEN(tlv_tptr, lspping_tlv_len);
638 tlv_hexdump=FALSE;
639
640 switch(lspping_tlv_type) {
641 case LSPPING_TLV_TARGET_FEC_STACK:
642 while (tlv_tlen != 0) {
643 /* Does the subTLV header go past the end of the TLV? */
644 if (tlv_tlen < sizeof(struct lspping_tlv_header)) {
645 ND_PRINT("\n\t TLV is too short");
646 tlv_hexdump = TRUE;
647 goto tlv_tooshort;
648 }
649 subtlv_hexdump=FALSE;
650
651 lspping_subtlv_header = (const struct lspping_tlv_header *)tlv_tptr;
652 lspping_subtlv_type=GET_BE_U_2(lspping_subtlv_header->type);
653 lspping_subtlv_len=GET_BE_U_2(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("\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_TCHECK_LEN(subtlv_tptr, lspping_subtlv_len);
665
666 ND_PRINT("\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("\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("\n\t %s/%u",
684 GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv4->prefix),
685 GET_U_1(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("\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("\n\t %s/%u",
698 GET_IP6ADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv6->prefix),
699 GET_U_1(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("\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("\n\t %s/%u",
712 GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv4->prefix),
713 GET_U_1(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("\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("\n\t %s/%u",
726 GET_IP6ADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv6->prefix),
727 GET_U_1(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("\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("\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 GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->tunnel_endpoint),
742 GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->tunnel_sender),
743 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->lsp_id),
744 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->tunnel_id),
745 GET_IPADDR_STRING(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("\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("\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 GET_IP6ADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->tunnel_endpoint),
760 GET_IP6ADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->tunnel_sender),
761 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->lsp_id),
762 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->tunnel_id),
763 GET_IP6ADDR_STRING(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("\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("\n\t RD: %s, %s/%u",
776 bgp_vpn_rd_print(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4->rd),
777 GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4->prefix),
778 GET_U_1(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("\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("\n\t RD: %s, %s/%u",
791 bgp_vpn_rd_print(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6->rd),
792 GET_IP6ADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6->prefix),
793 GET_U_1(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("\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("\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 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->sender_ve_id),
809 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->receiver_ve_id),
810 tok2str(mpls_pw_types_values,
811 "unknown",
812 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->encapsulation)),
813 GET_BE_U_2(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("\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("\n\t Remote PE: %s"
827 "\n\t PW ID: 0x%08x, PW Type: %s (%u)",
828 GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->remote_pe_address),
829 GET_BE_U_4(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->pw_id),
830 tok2str(mpls_pw_types_values,
831 "unknown",
832 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->pw_type)),
833 GET_BE_U_2(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("\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("\n\t Sender PE: %s, Remote PE: %s"
846 "\n\t PW ID: 0x%08x, PW Type: %s (%u)",
847 GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->sender_pe_address),
848 GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->remote_pe_address),
849 GET_BE_U_4(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->pw_id),
850 tok2str(mpls_pw_types_values,
851 "unknown",
852 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->pw_type)),
853 GET_BE_U_2(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("\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("\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_TCHECK_LEN(tlv_tptr,
890 sizeof(struct lspping_tlv_downstream_map_t));
891
892 tlv_ptr.lspping_tlv_downstream_map=
893 (const struct lspping_tlv_downstream_map_t *)tlv_tptr;
894
895 /* that strange thing with the downstream map TLV is that until now
896 * we do not know if its IPv4 or IPv6 or is unnumbered; after
897 * we find the address-type, we recast the tlv_tptr and move on. */
898
899 address_type = GET_U_1(tlv_ptr.lspping_tlv_downstream_map->address_type);
900 ND_PRINT("\n\t MTU: %u, Address-Type: %s (%u)",
901 GET_BE_U_2(tlv_ptr.lspping_tlv_downstream_map->mtu),
902 tok2str(lspping_tlv_downstream_addr_values,
903 "unknown",
904 address_type),
905 address_type);
906
907 switch(address_type) {
908
909 case LSPPING_AFI_IPV4:
910 /* Does the data go past the end of the TLV? */
911 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv4_t)) {
912 ND_PRINT("\n\t TLV is too short");
913 tlv_hexdump = TRUE;
914 goto tlv_tooshort;
915 }
916 /* Did we capture enough for this part of the TLV? */
917 ND_TCHECK_LEN(tlv_tptr,
918 sizeof(struct lspping_tlv_downstream_map_ipv4_t));
919
920 tlv_ptr.lspping_tlv_downstream_map_ipv4=
921 (const struct lspping_tlv_downstream_map_ipv4_t *)tlv_tptr;
922 ND_PRINT("\n\t Downstream IP: %s"
923 "\n\t Downstream Interface IP: %s",
924 GET_IPADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv4->downstream_ip),
925 GET_IPADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv4->downstream_interface));
926 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv4_t);
927 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv4_t);
928 break;
929 case LSPPING_AFI_IPV4_UNMB:
930 /* Does the data go past the end of the TLV? */
931 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t)) {
932 ND_PRINT("\n\t TLV is too short");
933 tlv_hexdump = TRUE;
934 goto tlv_tooshort;
935 }
936 /* Did we capture enough for this part of the TLV? */
937 ND_TCHECK_LEN(tlv_tptr,
938 sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t));
939
940 tlv_ptr.lspping_tlv_downstream_map_ipv4_unmb=
941 (const struct lspping_tlv_downstream_map_ipv4_unmb_t *)tlv_tptr;
942 ND_PRINT("\n\t Downstream IP: %s"
943 "\n\t Downstream Interface Index: 0x%08x",
944 GET_IPADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv4_unmb->downstream_ip),
945 GET_BE_U_4(tlv_ptr.lspping_tlv_downstream_map_ipv4_unmb->downstream_interface));
946 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t);
947 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t);
948 break;
949 case LSPPING_AFI_IPV6:
950 /* Does the data go past the end of the TLV? */
951 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv6_t)) {
952 ND_PRINT("\n\t TLV is too short");
953 tlv_hexdump = TRUE;
954 goto tlv_tooshort;
955 }
956 /* Did we capture enough for this part of the TLV? */
957 ND_TCHECK_LEN(tlv_tptr,
958 sizeof(struct lspping_tlv_downstream_map_ipv6_t));
959
960 tlv_ptr.lspping_tlv_downstream_map_ipv6=
961 (const struct lspping_tlv_downstream_map_ipv6_t *)tlv_tptr;
962 ND_PRINT("\n\t Downstream IP: %s"
963 "\n\t Downstream Interface IP: %s",
964 GET_IP6ADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv6->downstream_ip),
965 GET_IP6ADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv6->downstream_interface));
966 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv6_t);
967 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv6_t);
968 break;
969 case LSPPING_AFI_IPV6_UNMB:
970 /* Does the data go past the end of the TLV? */
971 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t)) {
972 ND_PRINT("\n\t TLV is too short");
973 tlv_hexdump = TRUE;
974 goto tlv_tooshort;
975 }
976 /* Did we capture enough for this part of the TLV? */
977 ND_TCHECK_LEN(tlv_tptr,
978 sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t));
979
980 tlv_ptr.lspping_tlv_downstream_map_ipv6_unmb=
981 (const struct lspping_tlv_downstream_map_ipv6_unmb_t *)tlv_tptr;
982 ND_PRINT("\n\t Downstream IP: %s"
983 "\n\t Downstream Interface Index: 0x%08x",
984 GET_IP6ADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv6_unmb->downstream_ip),
985 GET_BE_U_4(tlv_ptr.lspping_tlv_downstream_map_ipv6_unmb->downstream_interface));
986 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t);
987 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t);
988 break;
989
990 default:
991 /* should not happen ! - no error message - tok2str() has barked already */
992 break;
993 }
994
995 /* Does the data go past the end of the TLV? */
996 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_info_t)) {
997 ND_PRINT("\n\t TLV is too short");
998 tlv_hexdump = TRUE;
999 goto tlv_tooshort;
1000 }
1001 /* Did we capture enough for this part of the TLV? */
1002 ND_TCHECK_LEN(tlv_tptr,
1003 sizeof(struct lspping_tlv_downstream_map_info_t));
1004
1005 tlv_ptr.lspping_tlv_downstream_map_info=
1006 (const struct lspping_tlv_downstream_map_info_t *)tlv_tptr;
1007
1008 /* FIXME add hash-key type, depth limit, multipath processing */
1009
1010 /* FIXME print downstream labels */
1011
1012 tlv_hexdump=TRUE; /* dump the TLV until code complete */
1013
1014 break;
1015
1016 case LSPPING_TLV_BFD_DISCRIMINATOR:
1017 if (tlv_tlen < LSPPING_TLV_BFD_DISCRIMINATOR_LEN) {
1018 ND_PRINT("\n\t TLV is too short");
1019 tlv_hexdump = TRUE;
1020 goto tlv_tooshort;
1021 } else {
1022 ND_PRINT("\n\t BFD Discriminator 0x%08x", GET_BE_U_4(tlv_tptr));
1023 }
1024 break;
1025
1026 case LSPPING_TLV_VENDOR_ENTERPRISE:
1027 {
1028 uint32_t vendor_id;
1029
1030 if (tlv_tlen < LSPPING_TLV_VENDOR_ENTERPRISE_LEN) {
1031 ND_PRINT("\n\t TLV is too short");
1032 tlv_hexdump = TRUE;
1033 goto tlv_tooshort;
1034 } else {
1035 vendor_id = GET_BE_U_4(tlv_tptr);
1036 ND_PRINT("\n\t Vendor: %s (0x%04x)",
1037 tok2str(smi_values, "Unknown", vendor_id),
1038 vendor_id);
1039 }
1040 }
1041 break;
1042
1043 /*
1044 * FIXME those are the defined TLVs that lack a decoder
1045 * you are welcome to contribute code ;-)
1046 */
1047 case LSPPING_TLV_PAD:
1048 case LSPPING_TLV_ERROR_CODE:
1049 case LSPPING_TLV_VENDOR_PRIVATE:
1050
1051 default:
1052 if (ndo->ndo_vflag <= 1)
1053 print_unknown_data(ndo, tlv_tptr, "\n\t ", tlv_tlen);
1054 break;
1055 }
1056 /* do we want to see an additionally tlv hexdump ? */
1057 tlv_tooshort:
1058 if (ndo->ndo_vflag > 1 || tlv_hexdump==TRUE)
1059 print_unknown_data(ndo, tptr+sizeof(struct lspping_tlv_header), "\n\t ",
1060 lspping_tlv_len);
1061
1062
1063 /* All TLVs are aligned to four octet boundary */
1064 if (lspping_tlv_len % 4) {
1065 lspping_tlv_len += (4 - lspping_tlv_len % 4);
1066 /* Does the TLV, including padding, go past the end of the packet? */
1067 if (tlen < lspping_tlv_len+sizeof(struct lspping_tlv_header))
1068 goto tooshort;
1069 }
1070
1071 tptr+=lspping_tlv_len+sizeof(struct lspping_tlv_header);
1072 tlen-=lspping_tlv_len+sizeof(struct lspping_tlv_header);
1073 }
1074 return;
1075 tooshort:
1076 ND_PRINT("\n\t\t packet is too short");
1077 }
[mirror] the TCPdump network dissector