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1 office 1 /*
2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 */
30  
31 #define NETDISSECT_REWORKED
32 #ifdef HAVE_CONFIG_H
33 #include "config.h"
34 #endif
35  
36 /* The functions from print-esp.c used in this file are only defined when both
37 * OpenSSL and evp.h are detected. Employ the same preprocessor device here.
38 */
39 #ifndef HAVE_OPENSSL_EVP_H
40 #undef HAVE_LIBCRYPTO
41 #endif
42  
43 #include <tcpdump-stdinc.h>
44  
45 #include <string.h>
46  
47 #include "interface.h"
48 #include "addrtoname.h"
49 #include "extract.h" /* must come after interface.h */
50  
51 #include "ip.h"
52 #ifdef INET6
53 #include "ip6.h"
54 #endif
55  
56 /* refer to RFC 2408 */
57  
58 typedef u_char cookie_t[8];
59 typedef u_char msgid_t[4];
60  
61 #define PORT_ISAKMP 500
62  
63 /* 3.1 ISAKMP Header Format (IKEv1 and IKEv2)
64  
65 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
66 ! Initiator !
67 ! Cookie !
68 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
69 ! Responder !
70 ! Cookie !
71 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
72 ! Next Payload ! MjVer ! MnVer ! Exchange Type ! Flags !
73 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
74 ! Message ID !
75 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
76 ! Length !
77 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
78 */
79 struct isakmp {
80 cookie_t i_ck; /* Initiator Cookie */
81 cookie_t r_ck; /* Responder Cookie */
82 uint8_t np; /* Next Payload Type */
83 uint8_t vers;
84 #define ISAKMP_VERS_MAJOR 0xf0
85 #define ISAKMP_VERS_MAJOR_SHIFT 4
86 #define ISAKMP_VERS_MINOR 0x0f
87 #define ISAKMP_VERS_MINOR_SHIFT 0
88 uint8_t etype; /* Exchange Type */
89 uint8_t flags; /* Flags */
90 msgid_t msgid;
91 uint32_t len; /* Length */
92 };
93  
94 /* Next Payload Type */
95 #define ISAKMP_NPTYPE_NONE 0 /* NONE*/
96 #define ISAKMP_NPTYPE_SA 1 /* Security Association */
97 #define ISAKMP_NPTYPE_P 2 /* Proposal */
98 #define ISAKMP_NPTYPE_T 3 /* Transform */
99 #define ISAKMP_NPTYPE_KE 4 /* Key Exchange */
100 #define ISAKMP_NPTYPE_ID 5 /* Identification */
101 #define ISAKMP_NPTYPE_CERT 6 /* Certificate */
102 #define ISAKMP_NPTYPE_CR 7 /* Certificate Request */
103 #define ISAKMP_NPTYPE_HASH 8 /* Hash */
104 #define ISAKMP_NPTYPE_SIG 9 /* Signature */
105 #define ISAKMP_NPTYPE_NONCE 10 /* Nonce */
106 #define ISAKMP_NPTYPE_N 11 /* Notification */
107 #define ISAKMP_NPTYPE_D 12 /* Delete */
108 #define ISAKMP_NPTYPE_VID 13 /* Vendor ID */
109 #define ISAKMP_NPTYPE_v2E 46 /* v2 Encrypted payload */
110  
111 #define IKEv1_MAJOR_VERSION 1
112 #define IKEv1_MINOR_VERSION 0
113  
114 #define IKEv2_MAJOR_VERSION 2
115 #define IKEv2_MINOR_VERSION 0
116  
117 /* Flags */
118 #define ISAKMP_FLAG_E 0x01 /* Encryption Bit */
119 #define ISAKMP_FLAG_C 0x02 /* Commit Bit */
120 #define ISAKMP_FLAG_extra 0x04
121  
122 /* IKEv2 */
123 #define ISAKMP_FLAG_I (1 << 3) /* (I)nitiator */
124 #define ISAKMP_FLAG_V (1 << 4) /* (V)ersion */
125 #define ISAKMP_FLAG_R (1 << 5) /* (R)esponse */
126  
127  
128 /* 3.2 Payload Generic Header
129  
130 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
131 ! Next Payload ! RESERVED ! Payload Length !
132 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
133 */
134 struct isakmp_gen {
135 uint8_t np; /* Next Payload */
136 uint8_t critical; /* bit 7 - critical, rest is RESERVED */
137 uint16_t len; /* Payload Length */
138 };
139  
140 /* 3.3 Data Attributes
141  
142 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
143 !A! Attribute Type ! AF=0 Attribute Length !
144 !F! ! AF=1 Attribute Value !
145 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
146 . AF=0 Attribute Value .
147 . AF=1 Not Transmitted .
148 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
149 */
150 struct isakmp_data {
151 uint16_t type; /* defined by DOI-spec, and Attribute Format */
152 uint16_t lorv; /* if f equal 1, Attribute Length */
153 /* if f equal 0, Attribute Value */
154 /* if f equal 1, Attribute Value */
155 };
156  
157 /* 3.4 Security Association Payload */
158 /* MAY NOT be used, because of being defined in ipsec-doi. */
159 /*
160 If the current payload is the last in the message,
161 then the value of the next payload field will be 0.
162 This field MUST NOT contain the
163 values for the Proposal or Transform payloads as they are considered
164 part of the security association negotiation. For example, this
165 field would contain the value "10" (Nonce payload) in the first
166 message of a Base Exchange (see Section 4.4) and the value "0" in the
167 first message of an Identity Protect Exchange (see Section 4.5).
168 */
169 struct ikev1_pl_sa {
170 struct isakmp_gen h;
171 uint32_t doi; /* Domain of Interpretation */
172 uint32_t sit; /* Situation */
173 };
174  
175 /* 3.5 Proposal Payload */
176 /*
177 The value of the next payload field MUST only contain the value "2"
178 or "0". If there are additional Proposal payloads in the message,
179 then this field will be 2. If the current Proposal payload is the
180 last within the security association proposal, then this field will
181 be 0.
182 */
183 struct ikev1_pl_p {
184 struct isakmp_gen h;
185 uint8_t p_no; /* Proposal # */
186 uint8_t prot_id; /* Protocol */
187 uint8_t spi_size; /* SPI Size */
188 uint8_t num_t; /* Number of Transforms */
189 /* SPI */
190 };
191  
192 /* 3.6 Transform Payload */
193 /*
194 The value of the next payload field MUST only contain the value "3"
195 or "0". If there are additional Transform payloads in the proposal,
196 then this field will be 3. If the current Transform payload is the
197 last within the proposal, then this field will be 0.
198 */
199 struct ikev1_pl_t {
200 struct isakmp_gen h;
201 uint8_t t_no; /* Transform # */
202 uint8_t t_id; /* Transform-Id */
203 uint16_t reserved; /* RESERVED2 */
204 /* SA Attributes */
205 };
206  
207 /* 3.7 Key Exchange Payload */
208 struct ikev1_pl_ke {
209 struct isakmp_gen h;
210 /* Key Exchange Data */
211 };
212  
213 /* 3.8 Identification Payload */
214 /* MUST NOT to be used, because of being defined in ipsec-doi. */
215 struct ikev1_pl_id {
216 struct isakmp_gen h;
217 union {
218 uint8_t id_type; /* ID Type */
219 uint32_t doi_data; /* DOI Specific ID Data */
220 } d;
221 /* Identification Data */
222 };
223  
224 /* 3.9 Certificate Payload */
225 struct ikev1_pl_cert {
226 struct isakmp_gen h;
227 uint8_t encode; /* Cert Encoding */
228 char cert; /* Certificate Data */
229 /*
230 This field indicates the type of
231 certificate or certificate-related information contained in the
232 Certificate Data field.
233 */
234 };
235  
236 /* 3.10 Certificate Request Payload */
237 struct ikev1_pl_cr {
238 struct isakmp_gen h;
239 uint8_t num_cert; /* # Cert. Types */
240 /*
241 Certificate Types (variable length)
242 -- Contains a list of the types of certificates requested,
243 sorted in order of preference. Each individual certificate
244 type is 1 octet. This field is NOT requiredo
245 */
246 /* # Certificate Authorities (1 octet) */
247 /* Certificate Authorities (variable length) */
248 };
249  
250 /* 3.11 Hash Payload */
251 /* may not be used, because of having only data. */
252 struct ikev1_pl_hash {
253 struct isakmp_gen h;
254 /* Hash Data */
255 };
256  
257 /* 3.12 Signature Payload */
258 /* may not be used, because of having only data. */
259 struct ikev1_pl_sig {
260 struct isakmp_gen h;
261 /* Signature Data */
262 };
263  
264 /* 3.13 Nonce Payload */
265 /* may not be used, because of having only data. */
266 struct ikev1_pl_nonce {
267 struct isakmp_gen h;
268 /* Nonce Data */
269 };
270  
271 /* 3.14 Notification Payload */
272 struct ikev1_pl_n {
273 struct isakmp_gen h;
274 uint32_t doi; /* Domain of Interpretation */
275 uint8_t prot_id; /* Protocol-ID */
276 uint8_t spi_size; /* SPI Size */
277 uint16_t type; /* Notify Message Type */
278 /* SPI */
279 /* Notification Data */
280 };
281  
282 /* 3.14.1 Notify Message Types */
283 /* NOTIFY MESSAGES - ERROR TYPES */
284 #define ISAKMP_NTYPE_INVALID_PAYLOAD_TYPE 1
285 #define ISAKMP_NTYPE_DOI_NOT_SUPPORTED 2
286 #define ISAKMP_NTYPE_SITUATION_NOT_SUPPORTED 3
287 #define ISAKMP_NTYPE_INVALID_COOKIE 4
288 #define ISAKMP_NTYPE_INVALID_MAJOR_VERSION 5
289 #define ISAKMP_NTYPE_INVALID_MINOR_VERSION 6
290 #define ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE 7
291 #define ISAKMP_NTYPE_INVALID_FLAGS 8
292 #define ISAKMP_NTYPE_INVALID_MESSAGE_ID 9
293 #define ISAKMP_NTYPE_INVALID_PROTOCOL_ID 10
294 #define ISAKMP_NTYPE_INVALID_SPI 11
295 #define ISAKMP_NTYPE_INVALID_TRANSFORM_ID 12
296 #define ISAKMP_NTYPE_ATTRIBUTES_NOT_SUPPORTED 13
297 #define ISAKMP_NTYPE_NO_PROPOSAL_CHOSEN 14
298 #define ISAKMP_NTYPE_BAD_PROPOSAL_SYNTAX 15
299 #define ISAKMP_NTYPE_PAYLOAD_MALFORMED 16
300 #define ISAKMP_NTYPE_INVALID_KEY_INFORMATION 17
301 #define ISAKMP_NTYPE_INVALID_ID_INFORMATION 18
302 #define ISAKMP_NTYPE_INVALID_CERT_ENCODING 19
303 #define ISAKMP_NTYPE_INVALID_CERTIFICATE 20
304 #define ISAKMP_NTYPE_BAD_CERT_REQUEST_SYNTAX 21
305 #define ISAKMP_NTYPE_INVALID_CERT_AUTHORITY 22
306 #define ISAKMP_NTYPE_INVALID_HASH_INFORMATION 23
307 #define ISAKMP_NTYPE_AUTHENTICATION_FAILED 24
308 #define ISAKMP_NTYPE_INVALID_SIGNATURE 25
309 #define ISAKMP_NTYPE_ADDRESS_NOTIFICATION 26
310  
311 /* 3.15 Delete Payload */
312 struct ikev1_pl_d {
313 struct isakmp_gen h;
314 uint32_t doi; /* Domain of Interpretation */
315 uint8_t prot_id; /* Protocol-Id */
316 uint8_t spi_size; /* SPI Size */
317 uint16_t num_spi; /* # of SPIs */
318 /* SPI(es) */
319 };
320  
321 struct ikev1_ph1tab {
322 struct ikev1_ph1 *head;
323 struct ikev1_ph1 *tail;
324 int len;
325 };
326  
327 struct isakmp_ph2tab {
328 struct ikev1_ph2 *head;
329 struct ikev1_ph2 *tail;
330 int len;
331 };
332  
333 /* IKEv2 (RFC4306) */
334  
335 /* 3.3 Security Association Payload -- generic header */
336 /* 3.3.1. Proposal Substructure */
337 struct ikev2_p {
338 struct isakmp_gen h;
339 uint8_t p_no; /* Proposal # */
340 uint8_t prot_id; /* Protocol */
341 uint8_t spi_size; /* SPI Size */
342 uint8_t num_t; /* Number of Transforms */
343 };
344  
345 /* 3.3.2. Transform Substructure */
346 struct ikev2_t {
347 struct isakmp_gen h;
348 uint8_t t_type; /* Transform Type (ENCR,PRF,INTEG,etc.*/
349 uint8_t res2; /* reserved byte */
350 uint16_t t_id; /* Transform ID */
351 };
352  
353 enum ikev2_t_type {
354 IV2_T_ENCR = 1,
355 IV2_T_PRF = 2,
356 IV2_T_INTEG= 3,
357 IV2_T_DH = 4,
358 IV2_T_ESN = 5,
359 };
360  
361 /* 3.4. Key Exchange Payload */
362 struct ikev2_ke {
363 struct isakmp_gen h;
364 uint16_t ke_group;
365 uint16_t ke_res1;
366 /* KE data */
367 };
368  
369  
370 /* 3.5. Identification Payloads */
371 enum ikev2_id_type {
372 ID_IPV4_ADDR=1,
373 ID_FQDN=2,
374 ID_RFC822_ADDR=3,
375 ID_IPV6_ADDR=5,
376 ID_DER_ASN1_DN=9,
377 ID_DER_ASN1_GN=10,
378 ID_KEY_ID=11,
379 };
380 struct ikev2_id {
381 struct isakmp_gen h;
382 uint8_t type; /* ID type */
383 uint8_t res1;
384 uint16_t res2;
385 /* SPI */
386 /* Notification Data */
387 };
388  
389 /* 3.10 Notification Payload */
390 struct ikev2_n {
391 struct isakmp_gen h;
392 uint8_t prot_id; /* Protocol-ID */
393 uint8_t spi_size; /* SPI Size */
394 uint16_t type; /* Notify Message Type */
395 };
396  
397 enum ikev2_n_type {
398 IV2_NOTIFY_UNSUPPORTED_CRITICAL_PAYLOAD = 1,
399 IV2_NOTIFY_INVALID_IKE_SPI = 4,
400 IV2_NOTIFY_INVALID_MAJOR_VERSION = 5,
401 IV2_NOTIFY_INVALID_SYNTAX = 7,
402 IV2_NOTIFY_INVALID_MESSAGE_ID = 9,
403 IV2_NOTIFY_INVALID_SPI =11,
404 IV2_NOTIFY_NO_PROPOSAL_CHOSEN =14,
405 IV2_NOTIFY_INVALID_KE_PAYLOAD =17,
406 IV2_NOTIFY_AUTHENTICATION_FAILED =24,
407 IV2_NOTIFY_SINGLE_PAIR_REQUIRED =34,
408 IV2_NOTIFY_NO_ADDITIONAL_SAS =35,
409 IV2_NOTIFY_INTERNAL_ADDRESS_FAILURE =36,
410 IV2_NOTIFY_FAILED_CP_REQUIRED =37,
411 IV2_NOTIFY_INVALID_SELECTORS =39,
412 IV2_NOTIFY_INITIAL_CONTACT =16384,
413 IV2_NOTIFY_SET_WINDOW_SIZE =16385,
414 IV2_NOTIFY_ADDITIONAL_TS_POSSIBLE =16386,
415 IV2_NOTIFY_IPCOMP_SUPPORTED =16387,
416 IV2_NOTIFY_NAT_DETECTION_SOURCE_IP =16388,
417 IV2_NOTIFY_NAT_DETECTION_DESTINATION_IP =16389,
418 IV2_NOTIFY_COOKIE =16390,
419 IV2_NOTIFY_USE_TRANSPORT_MODE =16391,
420 IV2_NOTIFY_HTTP_CERT_LOOKUP_SUPPORTED =16392,
421 IV2_NOTIFY_REKEY_SA =16393,
422 IV2_NOTIFY_ESP_TFC_PADDING_NOT_SUPPORTED =16394,
423 IV2_NOTIFY_NON_FIRST_FRAGMENTS_ALSO =16395
424 };
425  
426 struct notify_messages {
427 uint16_t type;
428 char *msg;
429 };
430  
431 /* 3.8 Notification Payload */
432 struct ikev2_auth {
433 struct isakmp_gen h;
434 uint8_t auth_method; /* Protocol-ID */
435 uint8_t reserved[3];
436 /* authentication data */
437 };
438  
439 enum ikev2_auth_type {
440 IV2_RSA_SIG = 1,
441 IV2_SHARED = 2,
442 IV2_DSS_SIG = 3,
443 };
444  
445 /* refer to RFC 2409 */
446  
447 #if 0
448 /* isakmp sa structure */
449 struct oakley_sa {
450 uint8_t proto_id; /* OAKLEY */
451 vchar_t *spi; /* spi */
452 uint8_t dhgrp; /* DH; group */
453 uint8_t auth_t; /* method of authentication */
454 uint8_t prf_t; /* type of prf */
455 uint8_t hash_t; /* type of hash */
456 uint8_t enc_t; /* type of cipher */
457 uint8_t life_t; /* type of duration of lifetime */
458 uint32_t ldur; /* life duration */
459 };
460 #endif
461  
462 /* refer to RFC 2407 */
463  
464 #define IPSEC_DOI 1
465  
466 /* 4.2 IPSEC Situation Definition */
467 #define IPSECDOI_SIT_IDENTITY_ONLY 0x00000001
468 #define IPSECDOI_SIT_SECRECY 0x00000002
469 #define IPSECDOI_SIT_INTEGRITY 0x00000004
470  
471 /* 4.4.1 IPSEC Security Protocol Identifiers */
472 /* 4.4.2 IPSEC ISAKMP Transform Values */
473 #define IPSECDOI_PROTO_ISAKMP 1
474 #define IPSECDOI_KEY_IKE 1
475  
476 /* 4.4.1 IPSEC Security Protocol Identifiers */
477 #define IPSECDOI_PROTO_IPSEC_AH 2
478 /* 4.4.3 IPSEC AH Transform Values */
479 #define IPSECDOI_AH_MD5 2
480 #define IPSECDOI_AH_SHA 3
481 #define IPSECDOI_AH_DES 4
482 #define IPSECDOI_AH_SHA2_256 5
483 #define IPSECDOI_AH_SHA2_384 6
484 #define IPSECDOI_AH_SHA2_512 7
485  
486 /* 4.4.1 IPSEC Security Protocol Identifiers */
487 #define IPSECDOI_PROTO_IPSEC_ESP 3
488 /* 4.4.4 IPSEC ESP Transform Identifiers */
489 #define IPSECDOI_ESP_DES_IV64 1
490 #define IPSECDOI_ESP_DES 2
491 #define IPSECDOI_ESP_3DES 3
492 #define IPSECDOI_ESP_RC5 4
493 #define IPSECDOI_ESP_IDEA 5
494 #define IPSECDOI_ESP_CAST 6
495 #define IPSECDOI_ESP_BLOWFISH 7
496 #define IPSECDOI_ESP_3IDEA 8
497 #define IPSECDOI_ESP_DES_IV32 9
498 #define IPSECDOI_ESP_RC4 10
499 #define IPSECDOI_ESP_NULL 11
500 #define IPSECDOI_ESP_RIJNDAEL 12
501 #define IPSECDOI_ESP_AES 12
502  
503 /* 4.4.1 IPSEC Security Protocol Identifiers */
504 #define IPSECDOI_PROTO_IPCOMP 4
505 /* 4.4.5 IPSEC IPCOMP Transform Identifiers */
506 #define IPSECDOI_IPCOMP_OUI 1
507 #define IPSECDOI_IPCOMP_DEFLATE 2
508 #define IPSECDOI_IPCOMP_LZS 3
509  
510 /* 4.5 IPSEC Security Association Attributes */
511 #define IPSECDOI_ATTR_SA_LTYPE 1 /* B */
512 #define IPSECDOI_ATTR_SA_LTYPE_DEFAULT 1
513 #define IPSECDOI_ATTR_SA_LTYPE_SEC 1
514 #define IPSECDOI_ATTR_SA_LTYPE_KB 2
515 #define IPSECDOI_ATTR_SA_LDUR 2 /* V */
516 #define IPSECDOI_ATTR_SA_LDUR_DEFAULT 28800 /* 8 hours */
517 #define IPSECDOI_ATTR_GRP_DESC 3 /* B */
518 #define IPSECDOI_ATTR_ENC_MODE 4 /* B */
519 /* default value: host dependent */
520 #define IPSECDOI_ATTR_ENC_MODE_TUNNEL 1
521 #define IPSECDOI_ATTR_ENC_MODE_TRNS 2
522 #define IPSECDOI_ATTR_AUTH 5 /* B */
523 /* 0 means not to use authentication. */
524 #define IPSECDOI_ATTR_AUTH_HMAC_MD5 1
525 #define IPSECDOI_ATTR_AUTH_HMAC_SHA1 2
526 #define IPSECDOI_ATTR_AUTH_DES_MAC 3
527 #define IPSECDOI_ATTR_AUTH_KPDK 4 /*RFC-1826(Key/Pad/Data/Key)*/
528 /*
529 * When negotiating ESP without authentication, the Auth
530 * Algorithm attribute MUST NOT be included in the proposal.
531 * When negotiating ESP without confidentiality, the Auth
532 * Algorithm attribute MUST be included in the proposal and
533 * the ESP transform ID must be ESP_NULL.
534 */
535 #define IPSECDOI_ATTR_KEY_LENGTH 6 /* B */
536 #define IPSECDOI_ATTR_KEY_ROUNDS 7 /* B */
537 #define IPSECDOI_ATTR_COMP_DICT_SIZE 8 /* B */
538 #define IPSECDOI_ATTR_COMP_PRIVALG 9 /* V */
539  
540 /* 4.6.1 Security Association Payload */
541 struct ipsecdoi_sa {
542 struct isakmp_gen h;
543 uint32_t doi; /* Domain of Interpretation */
544 uint32_t sit; /* Situation */
545 };
546  
547 struct ipsecdoi_secrecy_h {
548 uint16_t len;
549 uint16_t reserved;
550 };
551  
552 /* 4.6.2.1 Identification Type Values */
553 struct ipsecdoi_id {
554 struct isakmp_gen h;
555 uint8_t type; /* ID Type */
556 uint8_t proto_id; /* Protocol ID */
557 uint16_t port; /* Port */
558 /* Identification Data */
559 };
560  
561 #define IPSECDOI_ID_IPV4_ADDR 1
562 #define IPSECDOI_ID_FQDN 2
563 #define IPSECDOI_ID_USER_FQDN 3
564 #define IPSECDOI_ID_IPV4_ADDR_SUBNET 4
565 #define IPSECDOI_ID_IPV6_ADDR 5
566 #define IPSECDOI_ID_IPV6_ADDR_SUBNET 6
567 #define IPSECDOI_ID_IPV4_ADDR_RANGE 7
568 #define IPSECDOI_ID_IPV6_ADDR_RANGE 8
569 #define IPSECDOI_ID_DER_ASN1_DN 9
570 #define IPSECDOI_ID_DER_ASN1_GN 10
571 #define IPSECDOI_ID_KEY_ID 11
572  
573 /* 4.6.3 IPSEC DOI Notify Message Types */
574 /* Notify Messages - Status Types */
575 #define IPSECDOI_NTYPE_RESPONDER_LIFETIME 24576
576 #define IPSECDOI_NTYPE_REPLAY_STATUS 24577
577 #define IPSECDOI_NTYPE_INITIAL_CONTACT 24578
578  
579 #define DECLARE_PRINTER(func) static const u_char *ike##func##_print( \
580 netdissect_options *ndo, u_char tpay, \
581 const struct isakmp_gen *ext, \
582 u_int item_len, \
583 const u_char *end_pointer, \
584 uint32_t phase,\
585 uint32_t doi0, \
586 uint32_t proto0, int depth)
587  
588 DECLARE_PRINTER(v1_sa);
589 DECLARE_PRINTER(v1_p);
590 DECLARE_PRINTER(v1_t);
591 DECLARE_PRINTER(v1_ke);
592 DECLARE_PRINTER(v1_id);
593 DECLARE_PRINTER(v1_cert);
594 DECLARE_PRINTER(v1_cr);
595 DECLARE_PRINTER(v1_sig);
596 DECLARE_PRINTER(v1_hash);
597 DECLARE_PRINTER(v1_nonce);
598 DECLARE_PRINTER(v1_n);
599 DECLARE_PRINTER(v1_d);
600 DECLARE_PRINTER(v1_vid);
601  
602 DECLARE_PRINTER(v2_sa);
603 DECLARE_PRINTER(v2_ke);
604 DECLARE_PRINTER(v2_ID);
605 DECLARE_PRINTER(v2_cert);
606 DECLARE_PRINTER(v2_cr);
607 DECLARE_PRINTER(v2_auth);
608 DECLARE_PRINTER(v2_nonce);
609 DECLARE_PRINTER(v2_n);
610 DECLARE_PRINTER(v2_d);
611 DECLARE_PRINTER(v2_vid);
612 DECLARE_PRINTER(v2_TS);
613 DECLARE_PRINTER(v2_cp);
614 DECLARE_PRINTER(v2_eap);
615  
616 static const u_char *ikev2_e_print(netdissect_options *ndo,
617 struct isakmp *base,
618 u_char tpay,
619 const struct isakmp_gen *ext,
620 u_int item_len,
621 const u_char *end_pointer,
622 uint32_t phase,
623 uint32_t doi0,
624 uint32_t proto0, int depth);
625  
626  
627 static const u_char *ike_sub0_print(netdissect_options *ndo,u_char, const struct isakmp_gen *,
628 const u_char *, uint32_t, uint32_t, uint32_t, int);
629 static const u_char *ikev1_sub_print(netdissect_options *ndo,u_char, const struct isakmp_gen *,
630 const u_char *, uint32_t, uint32_t, uint32_t, int);
631  
632 static const u_char *ikev2_sub_print(netdissect_options *ndo,
633 struct isakmp *base,
634 u_char np, const struct isakmp_gen *ext,
635 const u_char *ep, uint32_t phase,
636 uint32_t doi, uint32_t proto,
637 int depth);
638  
639  
640 static char *numstr(int);
641  
642 static void
643 ikev1_print(netdissect_options *ndo,
644 const u_char *bp, u_int length,
645 const u_char *bp2, struct isakmp *base);
646  
647 #define MAXINITIATORS 20
648 int ninitiator = 0;
649 union inaddr_u {
650 struct in_addr in4;
651 #ifdef INET6
652 struct in6_addr in6;
653 #endif
654 };
655 struct {
656 cookie_t initiator;
657 u_int version;
658 union inaddr_u iaddr;
659 union inaddr_u raddr;
660 } cookiecache[MAXINITIATORS];
661  
662 /* protocol id */
663 static const char *protoidstr[] = {
664 NULL, "isakmp", "ipsec-ah", "ipsec-esp", "ipcomp",
665 };
666  
667 /* isakmp->np */
668 static const char *npstr[] = {
669 "none", "sa", "p", "t", "ke", "id", "cert", "cr", "hash", /* 0 - 8 */
670 "sig", "nonce", "n", "d", "vid", /* 9 - 13 */
671 "pay14", "pay15", "pay16", "pay17", "pay18", /* 14- 18 */
672 "pay19", "pay20", "pay21", "pay22", "pay23", /* 19- 23 */
673 "pay24", "pay25", "pay26", "pay27", "pay28", /* 24- 28 */
674 "pay29", "pay30", "pay31", "pay32", /* 29- 32 */
675 "v2sa", "v2ke", "v2IDi", "v2IDr", "v2cert",/* 33- 37 */
676 "v2cr", "v2auth","v2nonce", "v2n", "v2d", /* 38- 42 */
677 "v2vid", "v2TSi", "v2TSr", "v2e", "v2cp", /* 43- 47 */
678 "v2eap", /* 48 */
679  
680 };
681  
682 /* isakmp->np */
683 static const u_char *(*npfunc[])(netdissect_options *ndo, u_char tpay,
684 const struct isakmp_gen *ext,
685 u_int item_len,
686 const u_char *end_pointer,
687 uint32_t phase,
688 uint32_t doi0,
689 uint32_t proto0, int depth) = {
690 NULL,
691 ikev1_sa_print,
692 ikev1_p_print,
693 ikev1_t_print,
694 ikev1_ke_print,
695 ikev1_id_print,
696 ikev1_cert_print,
697 ikev1_cr_print,
698 ikev1_hash_print,
699 ikev1_sig_print,
700 ikev1_nonce_print,
701 ikev1_n_print,
702 ikev1_d_print,
703 ikev1_vid_print, /* 13 */
704 NULL, NULL, NULL, NULL, NULL, /* 14- 18 */
705 NULL, NULL, NULL, NULL, NULL, /* 19- 23 */
706 NULL, NULL, NULL, NULL, NULL, /* 24- 28 */
707 NULL, NULL, NULL, NULL, /* 29- 32 */
708 ikev2_sa_print, /* 33 */
709 ikev2_ke_print, /* 34 */
710 ikev2_ID_print, /* 35 */
711 ikev2_ID_print, /* 36 */
712 ikev2_cert_print, /* 37 */
713 ikev2_cr_print, /* 38 */
714 ikev2_auth_print, /* 39 */
715 ikev2_nonce_print, /* 40 */
716 ikev2_n_print, /* 41 */
717 ikev2_d_print, /* 42 */
718 ikev2_vid_print, /* 43 */
719 ikev2_TS_print, /* 44 */
720 ikev2_TS_print, /* 45 */
721 NULL, /* ikev2_e_print,*/ /* 46 - special */
722 ikev2_cp_print, /* 47 */
723 ikev2_eap_print, /* 48 */
724 };
725  
726 /* isakmp->etype */
727 static const char *etypestr[] = {
728 /* IKEv1 exchange types */
729 "none", "base", "ident", "auth", "agg", "inf", NULL, NULL, /* 0-7 */
730 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* 8-15 */
731 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* 16-23 */
732 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* 24-31 */
733 "oakley-quick", "oakley-newgroup", /* 32-33 */
734 /* IKEv2 exchange types */
735 "ikev2_init", "ikev2_auth", "child_sa", "inf2" /* 34-37 */
736 };
737  
738 #define STR_OR_ID(x, tab) \
739 (((x) < sizeof(tab)/sizeof(tab[0]) && tab[(x)]) ? tab[(x)] : numstr(x))
740 #define PROTOIDSTR(x) STR_OR_ID(x, protoidstr)
741 #define NPSTR(x) STR_OR_ID(x, npstr)
742 #define ETYPESTR(x) STR_OR_ID(x, etypestr)
743  
744 #define CHECKLEN(p, np) \
745 if (ep < (u_char *)(p)) { \
746 ND_PRINT((ndo," [|%s]", NPSTR(np))); \
747 goto done; \
748 }
749  
750  
751 #define NPFUNC(x) \
752 (((x) < sizeof(npfunc)/sizeof(npfunc[0]) && npfunc[(x)]) \
753 ? npfunc[(x)] : NULL)
754  
755 static int
756 iszero(u_char *p, size_t l)
757 {
758 while (l--) {
759 if (*p++)
760 return 0;
761 }
762 return 1;
763 }
764  
765 /* find cookie from initiator cache */
766 static int
767 cookie_find(cookie_t *in)
768 {
769 int i;
770  
771 for (i = 0; i < MAXINITIATORS; i++) {
772 if (memcmp(in, &cookiecache[i].initiator, sizeof(*in)) == 0)
773 return i;
774 }
775  
776 return -1;
777 }
778  
779 /* record initiator */
780 static void
781 cookie_record(cookie_t *in, const u_char *bp2)
782 {
783 int i;
784 struct ip *ip;
785 #ifdef INET6
786 struct ip6_hdr *ip6;
787 #endif
788  
789 i = cookie_find(in);
790 if (0 <= i) {
791 ninitiator = (i + 1) % MAXINITIATORS;
792 return;
793 }
794  
795 ip = (struct ip *)bp2;
796 switch (IP_V(ip)) {
797 case 4:
798 cookiecache[ninitiator].version = 4;
799 UNALIGNED_MEMCPY(&cookiecache[ninitiator].iaddr.in4, &ip->ip_src, sizeof(struct in_addr));
800 UNALIGNED_MEMCPY(&cookiecache[ninitiator].raddr.in4, &ip->ip_dst, sizeof(struct in_addr));
801 break;
802 #ifdef INET6
803 case 6:
804 ip6 = (struct ip6_hdr *)bp2;
805 cookiecache[ninitiator].version = 6;
806 UNALIGNED_MEMCPY(&cookiecache[ninitiator].iaddr.in6, &ip6->ip6_src, sizeof(struct in6_addr));
807 UNALIGNED_MEMCPY(&cookiecache[ninitiator].raddr.in6, &ip6->ip6_dst, sizeof(struct in6_addr));
808 break;
809 #endif
810 default:
811 return;
812 }
813 UNALIGNED_MEMCPY(&cookiecache[ninitiator].initiator, in, sizeof(*in));
814 ninitiator = (ninitiator + 1) % MAXINITIATORS;
815 }
816  
817 #define cookie_isinitiator(x, y) cookie_sidecheck((x), (y), 1)
818 #define cookie_isresponder(x, y) cookie_sidecheck((x), (y), 0)
819 static int
820 cookie_sidecheck(int i, const u_char *bp2, int initiator)
821 {
822 struct ip *ip;
823 #ifdef INET6
824 struct ip6_hdr *ip6;
825 #endif
826  
827 ip = (struct ip *)bp2;
828 switch (IP_V(ip)) {
829 case 4:
830 if (cookiecache[i].version != 4)
831 return 0;
832 if (initiator) {
833 if (UNALIGNED_MEMCMP(&ip->ip_src, &cookiecache[i].iaddr.in4, sizeof(struct in_addr)) == 0)
834 return 1;
835 } else {
836 if (UNALIGNED_MEMCMP(&ip->ip_src, &cookiecache[i].raddr.in4, sizeof(struct in_addr)) == 0)
837 return 1;
838 }
839 break;
840 #ifdef INET6
841 case 6:
842 if (cookiecache[i].version != 6)
843 return 0;
844 ip6 = (struct ip6_hdr *)bp2;
845 if (initiator) {
846 if (UNALIGNED_MEMCMP(&ip6->ip6_src, &cookiecache[i].iaddr.in6, sizeof(struct in6_addr)) == 0)
847 return 1;
848 } else {
849 if (UNALIGNED_MEMCMP(&ip6->ip6_src, &cookiecache[i].raddr.in6, sizeof(struct in6_addr)) == 0)
850 return 1;
851 }
852 break;
853 #endif /* INET6 */
854 default:
855 break;
856 }
857  
858 return 0;
859 }
860  
861 static void
862 hexprint(netdissect_options *ndo, caddr_t loc, size_t len)
863 {
864 u_char *p;
865 size_t i;
866  
867 p = (u_char *)loc;
868 for (i = 0; i < len; i++)
869 ND_PRINT((ndo,"%02x", p[i] & 0xff));
870 }
871  
872 static int
873 rawprint(netdissect_options *ndo, caddr_t loc, size_t len)
874 {
875 ND_TCHECK2(*loc, len);
876  
877 hexprint(ndo, loc, len);
878 return 1;
879 trunc:
880 return 0;
881 }
882  
883  
884 /*
885 * returns false if we run out of data buffer
886 */
887 static int ike_show_somedata(netdissect_options *ndo,
888 const u_char *cp, const u_char *ep)
889 {
890 /* there is too much data, just show some of it */
891 const u_char *end = ep - 20;
892 int elen = 20;
893 int len = ep - cp;
894 if(len > 10) {
895 len = 10;
896 }
897  
898 /* really shouldn't happen because of above */
899 if(end < cp + len) {
900 end = cp+len;
901 elen = ep - end;
902 }
903  
904 ND_PRINT((ndo," data=("));
905 if(!rawprint(ndo, (caddr_t)(cp), len)) goto trunc;
906 ND_PRINT((ndo, "..."));
907 if(elen) {
908 if(!rawprint(ndo, (caddr_t)(end), elen)) goto trunc;
909 }
910 ND_PRINT((ndo,")"));
911 return 1;
912  
913 trunc:
914 return 0;
915 }
916  
917 struct attrmap {
918 const char *type;
919 u_int nvalue;
920 const char *value[30]; /*XXX*/
921 };
922  
923 static const u_char *
924 ikev1_attrmap_print(netdissect_options *ndo,
925 const u_char *p, const u_char *ep,
926 const struct attrmap *map, size_t nmap)
927 {
928 int totlen;
929 uint32_t t, v;
930  
931 if (p[0] & 0x80)
932 totlen = 4;
933 else
934 totlen = 4 + EXTRACT_16BITS(&p[2]);
935 if (ep < p + totlen) {
936 ND_PRINT((ndo,"[|attr]"));
937 return ep + 1;
938 }
939  
940 ND_PRINT((ndo,"("));
941 t = EXTRACT_16BITS(&p[0]) & 0x7fff;
942 if (map && t < nmap && map[t].type)
943 ND_PRINT((ndo,"type=%s ", map[t].type));
944 else
945 ND_PRINT((ndo,"type=#%d ", t));
946 if (p[0] & 0x80) {
947 ND_PRINT((ndo,"value="));
948 v = EXTRACT_16BITS(&p[2]);
949 if (map && t < nmap && v < map[t].nvalue && map[t].value[v])
950 ND_PRINT((ndo,"%s", map[t].value[v]));
951 else
952 rawprint(ndo, (caddr_t)&p[2], 2);
953 } else {
954 ND_PRINT((ndo,"len=%d value=", EXTRACT_16BITS(&p[2])));
955 rawprint(ndo, (caddr_t)&p[4], EXTRACT_16BITS(&p[2]));
956 }
957 ND_PRINT((ndo,")"));
958 return p + totlen;
959 }
960  
961 static const u_char *
962 ikev1_attr_print(netdissect_options *ndo, const u_char *p, const u_char *ep)
963 {
964 int totlen;
965 uint32_t t;
966  
967 if (p[0] & 0x80)
968 totlen = 4;
969 else
970 totlen = 4 + EXTRACT_16BITS(&p[2]);
971 if (ep < p + totlen) {
972 ND_PRINT((ndo,"[|attr]"));
973 return ep + 1;
974 }
975  
976 ND_PRINT((ndo,"("));
977 t = EXTRACT_16BITS(&p[0]) & 0x7fff;
978 ND_PRINT((ndo,"type=#%d ", t));
979 if (p[0] & 0x80) {
980 ND_PRINT((ndo,"value="));
981 t = p[2];
982 rawprint(ndo, (caddr_t)&p[2], 2);
983 } else {
984 ND_PRINT((ndo,"len=%d value=", EXTRACT_16BITS(&p[2])));
985 rawprint(ndo, (caddr_t)&p[4], EXTRACT_16BITS(&p[2]));
986 }
987 ND_PRINT((ndo,")"));
988 return p + totlen;
989 }
990  
991 static const u_char *
992 ikev1_sa_print(netdissect_options *ndo, u_char tpay _U_,
993 const struct isakmp_gen *ext,
994 u_int item_len _U_,
995 const u_char *ep, uint32_t phase, uint32_t doi0 _U_,
996 uint32_t proto0, int depth)
997 {
998 const struct ikev1_pl_sa *p;
999 struct ikev1_pl_sa sa;
1000 uint32_t doi, sit, ident;
1001 const u_char *cp, *np;
1002 int t;
1003  
1004 ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_SA)));
1005  
1006 p = (struct ikev1_pl_sa *)ext;
1007 ND_TCHECK(*p);
1008 UNALIGNED_MEMCPY(&sa, ext, sizeof(sa));
1009 doi = ntohl(sa.doi);
1010 sit = ntohl(sa.sit);
1011 if (doi != 1) {
1012 ND_PRINT((ndo," doi=%d", doi));
1013 ND_PRINT((ndo," situation=%u", (uint32_t)ntohl(sa.sit)));
1014 return (u_char *)(p + 1);
1015 }
1016  
1017 ND_PRINT((ndo," doi=ipsec"));
1018 ND_PRINT((ndo," situation="));
1019 t = 0;
1020 if (sit & 0x01) {
1021 ND_PRINT((ndo,"identity"));
1022 t++;
1023 }
1024 if (sit & 0x02) {
1025 ND_PRINT((ndo,"%ssecrecy", t ? "+" : ""));
1026 t++;
1027 }
1028 if (sit & 0x04)
1029 ND_PRINT((ndo,"%sintegrity", t ? "+" : ""));
1030  
1031 np = (u_char *)ext + sizeof(sa);
1032 if (sit != 0x01) {
1033 ND_TCHECK2(*(ext + 1), sizeof(ident));
1034 UNALIGNED_MEMCPY(&ident, ext + 1, sizeof(ident));
1035 ND_PRINT((ndo," ident=%u", (uint32_t)ntohl(ident)));
1036 np += sizeof(ident);
1037 }
1038  
1039 ext = (struct isakmp_gen *)np;
1040 ND_TCHECK(*ext);
1041  
1042 cp = ikev1_sub_print(ndo, ISAKMP_NPTYPE_P, ext, ep, phase, doi, proto0,
1043 depth);
1044  
1045 return cp;
1046 trunc:
1047 ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_SA)));
1048 return NULL;
1049 }
1050  
1051 static const u_char *
1052 ikev1_p_print(netdissect_options *ndo, u_char tpay _U_,
1053 const struct isakmp_gen *ext, u_int item_len _U_,
1054 const u_char *ep, uint32_t phase, uint32_t doi0,
1055 uint32_t proto0 _U_, int depth)
1056 {
1057 const struct ikev1_pl_p *p;
1058 struct ikev1_pl_p prop;
1059 const u_char *cp;
1060  
1061 ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_P)));
1062  
1063 p = (struct ikev1_pl_p *)ext;
1064 ND_TCHECK(*p);
1065 UNALIGNED_MEMCPY(&prop, ext, sizeof(prop));
1066 ND_PRINT((ndo," #%d protoid=%s transform=%d",
1067 prop.p_no, PROTOIDSTR(prop.prot_id), prop.num_t));
1068 if (prop.spi_size) {
1069 ND_PRINT((ndo," spi="));
1070 if (!rawprint(ndo, (caddr_t)(p + 1), prop.spi_size))
1071 goto trunc;
1072 }
1073  
1074 ext = (struct isakmp_gen *)((u_char *)(p + 1) + prop.spi_size);
1075 ND_TCHECK(*ext);
1076  
1077 cp = ikev1_sub_print(ndo, ISAKMP_NPTYPE_T, ext, ep, phase, doi0,
1078 prop.prot_id, depth);
1079  
1080 return cp;
1081 trunc:
1082 ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_P)));
1083 return NULL;
1084 }
1085  
1086 static const char *ikev1_p_map[] = {
1087 NULL, "ike",
1088 };
1089  
1090 static const char *ikev2_t_type_map[]={
1091 NULL, "encr", "prf", "integ", "dh", "esn"
1092 };
1093  
1094 static const char *ah_p_map[] = {
1095 NULL, "(reserved)", "md5", "sha", "1des",
1096 "sha2-256", "sha2-384", "sha2-512",
1097 };
1098  
1099 static const char *prf_p_map[] = {
1100 NULL, "hmac-md5", "hmac-sha", "hmac-tiger",
1101 "aes128_xcbc"
1102 };
1103  
1104 static const char *integ_p_map[] = {
1105 NULL, "hmac-md5", "hmac-sha", "dec-mac",
1106 "kpdk-md5", "aes-xcbc"
1107 };
1108  
1109 static const char *esn_p_map[] = {
1110 "no-esn", "esn"
1111 };
1112  
1113 static const char *dh_p_map[] = {
1114 NULL, "modp768",
1115 "modp1024", /* group 2 */
1116 "EC2N 2^155", /* group 3 */
1117 "EC2N 2^185", /* group 4 */
1118 "modp1536", /* group 5 */
1119 "iana-grp06", "iana-grp07", /* reserved */
1120 "iana-grp08", "iana-grp09",
1121 "iana-grp10", "iana-grp11",
1122 "iana-grp12", "iana-grp13",
1123 "modp2048", /* group 14 */
1124 "modp3072", /* group 15 */
1125 "modp4096", /* group 16 */
1126 "modp6144", /* group 17 */
1127 "modp8192", /* group 18 */
1128 };
1129  
1130 static const char *esp_p_map[] = {
1131 NULL, "1des-iv64", "1des", "3des", "rc5", "idea", "cast",
1132 "blowfish", "3idea", "1des-iv32", "rc4", "null", "aes"
1133 };
1134  
1135 static const char *ipcomp_p_map[] = {
1136 NULL, "oui", "deflate", "lzs",
1137 };
1138  
1139 static const struct attrmap ipsec_t_map[] = {
1140 { NULL, 0, { NULL } },
1141 { "lifetype", 3, { NULL, "sec", "kb", }, },
1142 { "life", 0, { NULL } },
1143 { "group desc", 18, { NULL, "modp768",
1144 "modp1024", /* group 2 */
1145 "EC2N 2^155", /* group 3 */
1146 "EC2N 2^185", /* group 4 */
1147 "modp1536", /* group 5 */
1148 "iana-grp06", "iana-grp07", /* reserved */
1149 "iana-grp08", "iana-grp09",
1150 "iana-grp10", "iana-grp11",
1151 "iana-grp12", "iana-grp13",
1152 "modp2048", /* group 14 */
1153 "modp3072", /* group 15 */
1154 "modp4096", /* group 16 */
1155 "modp6144", /* group 17 */
1156 "modp8192", /* group 18 */
1157 }, },
1158 { "enc mode", 3, { NULL, "tunnel", "transport", }, },
1159 { "auth", 5, { NULL, "hmac-md5", "hmac-sha1", "1des-mac", "keyed", }, },
1160 { "keylen", 0, { NULL } },
1161 { "rounds", 0, { NULL } },
1162 { "dictsize", 0, { NULL } },
1163 { "privalg", 0, { NULL } },
1164 };
1165  
1166 static const struct attrmap encr_t_map[] = {
1167 { NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 0, 1 */
1168 { NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 2, 3 */
1169 { NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 4, 5 */
1170 { NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 6, 7 */
1171 { NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 8, 9 */
1172 { NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 10,11*/
1173 { NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 12,13*/
1174 { "keylen", 14, { NULL }},
1175 };
1176  
1177 static const struct attrmap oakley_t_map[] = {
1178 { NULL, 0, { NULL } },
1179 { "enc", 8, { NULL, "1des", "idea", "blowfish", "rc5",
1180 "3des", "cast", "aes", }, },
1181 { "hash", 7, { NULL, "md5", "sha1", "tiger",
1182 "sha2-256", "sha2-384", "sha2-512", }, },
1183 { "auth", 6, { NULL, "preshared", "dss", "rsa sig", "rsa enc",
1184 "rsa enc revised", }, },
1185 { "group desc", 18, { NULL, "modp768",
1186 "modp1024", /* group 2 */
1187 "EC2N 2^155", /* group 3 */
1188 "EC2N 2^185", /* group 4 */
1189 "modp1536", /* group 5 */
1190 "iana-grp06", "iana-grp07", /* reserved */
1191 "iana-grp08", "iana-grp09",
1192 "iana-grp10", "iana-grp11",
1193 "iana-grp12", "iana-grp13",
1194 "modp2048", /* group 14 */
1195 "modp3072", /* group 15 */
1196 "modp4096", /* group 16 */
1197 "modp6144", /* group 17 */
1198 "modp8192", /* group 18 */
1199 }, },
1200 { "group type", 4, { NULL, "MODP", "ECP", "EC2N", }, },
1201 { "group prime", 0, { NULL } },
1202 { "group gen1", 0, { NULL } },
1203 { "group gen2", 0, { NULL } },
1204 { "group curve A", 0, { NULL } },
1205 { "group curve B", 0, { NULL } },
1206 { "lifetype", 3, { NULL, "sec", "kb", }, },
1207 { "lifeduration", 0, { NULL } },
1208 { "prf", 0, { NULL } },
1209 { "keylen", 0, { NULL } },
1210 { "field", 0, { NULL } },
1211 { "order", 0, { NULL } },
1212 };
1213  
1214 static const u_char *
1215 ikev1_t_print(netdissect_options *ndo, u_char tpay _U_,
1216 const struct isakmp_gen *ext, u_int item_len,
1217 const u_char *ep, uint32_t phase _U_, uint32_t doi _U_,
1218 uint32_t proto, int depth _U_)
1219 {
1220 const struct ikev1_pl_t *p;
1221 struct ikev1_pl_t t;
1222 const u_char *cp;
1223 const char *idstr;
1224 const struct attrmap *map;
1225 size_t nmap;
1226 const u_char *ep2;
1227  
1228 ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_T)));
1229  
1230 p = (struct ikev1_pl_t *)ext;
1231 ND_TCHECK(*p);
1232 UNALIGNED_MEMCPY(&t, ext, sizeof(t));
1233  
1234 switch (proto) {
1235 case 1:
1236 idstr = STR_OR_ID(t.t_id, ikev1_p_map);
1237 map = oakley_t_map;
1238 nmap = sizeof(oakley_t_map)/sizeof(oakley_t_map[0]);
1239 break;
1240 case 2:
1241 idstr = STR_OR_ID(t.t_id, ah_p_map);
1242 map = ipsec_t_map;
1243 nmap = sizeof(ipsec_t_map)/sizeof(ipsec_t_map[0]);
1244 break;
1245 case 3:
1246 idstr = STR_OR_ID(t.t_id, esp_p_map);
1247 map = ipsec_t_map;
1248 nmap = sizeof(ipsec_t_map)/sizeof(ipsec_t_map[0]);
1249 break;
1250 case 4:
1251 idstr = STR_OR_ID(t.t_id, ipcomp_p_map);
1252 map = ipsec_t_map;
1253 nmap = sizeof(ipsec_t_map)/sizeof(ipsec_t_map[0]);
1254 break;
1255 default:
1256 idstr = NULL;
1257 map = NULL;
1258 nmap = 0;
1259 break;
1260 }
1261  
1262 if (idstr)
1263 ND_PRINT((ndo," #%d id=%s ", t.t_no, idstr));
1264 else
1265 ND_PRINT((ndo," #%d id=%d ", t.t_no, t.t_id));
1266 cp = (u_char *)(p + 1);
1267 ep2 = (u_char *)p + item_len;
1268 while (cp < ep && cp < ep2) {
1269 if (map && nmap) {
1270 cp = ikev1_attrmap_print(ndo, cp, (ep < ep2) ? ep : ep2,
1271 map, nmap);
1272 } else
1273 cp = ikev1_attr_print(ndo, cp, (ep < ep2) ? ep : ep2);
1274 }
1275 if (ep < ep2)
1276 ND_PRINT((ndo,"..."));
1277 return cp;
1278 trunc:
1279 ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_T)));
1280 return NULL;
1281 }
1282  
1283 static const u_char *
1284 ikev1_ke_print(netdissect_options *ndo, u_char tpay _U_,
1285 const struct isakmp_gen *ext, u_int item_len _U_,
1286 const u_char *ep _U_, uint32_t phase _U_, uint32_t doi _U_,
1287 uint32_t proto _U_, int depth _U_)
1288 {
1289 struct isakmp_gen e;
1290  
1291 ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_KE)));
1292  
1293 ND_TCHECK(*ext);
1294 UNALIGNED_MEMCPY(&e, ext, sizeof(e));
1295 ND_PRINT((ndo," key len=%d", ntohs(e.len) - 4));
1296 if (2 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
1297 ND_PRINT((ndo," "));
1298 if (!rawprint(ndo, (caddr_t)(ext + 1), ntohs(e.len) - 4))
1299 goto trunc;
1300 }
1301 return (u_char *)ext + ntohs(e.len);
1302 trunc:
1303 ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_KE)));
1304 return NULL;
1305 }
1306  
1307 static const u_char *
1308 ikev1_id_print(netdissect_options *ndo, u_char tpay _U_,
1309 const struct isakmp_gen *ext, u_int item_len,
1310 const u_char *ep _U_, uint32_t phase, uint32_t doi _U_,
1311 uint32_t proto _U_, int depth _U_)
1312 {
1313 #define USE_IPSECDOI_IN_PHASE1 1
1314 const struct ikev1_pl_id *p;
1315 struct ikev1_pl_id id;
1316 static const char *idtypestr[] = {
1317 "IPv4", "IPv4net", "IPv6", "IPv6net",
1318 };
1319 static const char *ipsecidtypestr[] = {
1320 NULL, "IPv4", "FQDN", "user FQDN", "IPv4net", "IPv6",
1321 "IPv6net", "IPv4range", "IPv6range", "ASN1 DN", "ASN1 GN",
1322 "keyid",
1323 };
1324 int len;
1325 const u_char *data;
1326  
1327 ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_ID)));
1328  
1329 p = (struct ikev1_pl_id *)ext;
1330 ND_TCHECK(*p);
1331 UNALIGNED_MEMCPY(&id, ext, sizeof(id));
1332 if (sizeof(*p) < item_len) {
1333 data = (u_char *)(p + 1);
1334 len = item_len - sizeof(*p);
1335 } else {
1336 data = NULL;
1337 len = 0;
1338 }
1339  
1340 #if 0 /*debug*/
1341 ND_PRINT((ndo," [phase=%d doi=%d proto=%d]", phase, doi, proto));
1342 #endif
1343 switch (phase) {
1344 #ifndef USE_IPSECDOI_IN_PHASE1
1345 case 1:
1346 #endif
1347 default:
1348 ND_PRINT((ndo," idtype=%s", STR_OR_ID(id.d.id_type, idtypestr)));
1349 ND_PRINT((ndo," doi_data=%u",
1350 (uint32_t)(ntohl(id.d.doi_data) & 0xffffff)));
1351 break;
1352  
1353 #ifdef USE_IPSECDOI_IN_PHASE1
1354 case 1:
1355 #endif
1356 case 2:
1357 {
1358 const struct ipsecdoi_id *p;
1359 struct ipsecdoi_id id;
1360 struct protoent *pe;
1361  
1362 p = (struct ipsecdoi_id *)ext;
1363 ND_TCHECK(*p);
1364 UNALIGNED_MEMCPY(&id, ext, sizeof(id));
1365 ND_PRINT((ndo," idtype=%s", STR_OR_ID(id.type, ipsecidtypestr)));
1366 /* A protocol ID of 0 DOES NOT mean IPPROTO_IP! */
1367 pe = id.proto_id ? getprotobynumber(id.proto_id) : NULL;
1368 if (pe)
1369 ND_PRINT((ndo," protoid=%s", pe->p_name));
1370 else
1371 ND_PRINT((ndo," protoid=%u", id.proto_id));
1372 ND_PRINT((ndo," port=%d", ntohs(id.port)));
1373 if (!len)
1374 break;
1375 if (data == NULL)
1376 goto trunc;
1377 ND_TCHECK2(*data, len);
1378 switch (id.type) {
1379 case IPSECDOI_ID_IPV4_ADDR:
1380 if (len < 4)
1381 ND_PRINT((ndo," len=%d [bad: < 4]", len));
1382 else
1383 ND_PRINT((ndo," len=%d %s", len, ipaddr_string(ndo, data)));
1384 len = 0;
1385 break;
1386 case IPSECDOI_ID_FQDN:
1387 case IPSECDOI_ID_USER_FQDN:
1388 {
1389 int i;
1390 ND_PRINT((ndo," len=%d ", len));
1391 for (i = 0; i < len; i++)
1392 safeputchar(ndo, data[i]);
1393 len = 0;
1394 break;
1395 }
1396 case IPSECDOI_ID_IPV4_ADDR_SUBNET:
1397 {
1398 const u_char *mask;
1399 if (len < 8)
1400 ND_PRINT((ndo," len=%d [bad: < 8]", len));
1401 else {
1402 mask = data + sizeof(struct in_addr);
1403 ND_PRINT((ndo," len=%d %s/%u.%u.%u.%u", len,
1404 ipaddr_string(ndo, data),
1405 mask[0], mask[1], mask[2], mask[3]));
1406 }
1407 len = 0;
1408 break;
1409 }
1410 #ifdef INET6
1411 case IPSECDOI_ID_IPV6_ADDR:
1412 if (len < 16)
1413 ND_PRINT((ndo," len=%d [bad: < 16]", len));
1414 else
1415 ND_PRINT((ndo," len=%d %s", len, ip6addr_string(ndo, data)));
1416 len = 0;
1417 break;
1418 case IPSECDOI_ID_IPV6_ADDR_SUBNET:
1419 {
1420 const u_char *mask;
1421 if (len < 20)
1422 ND_PRINT((ndo," len=%d [bad: < 20]", len));
1423 else {
1424 mask = (u_char *)(data + sizeof(struct in6_addr));
1425 /*XXX*/
1426 ND_PRINT((ndo," len=%d %s/0x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", len,
1427 ip6addr_string(ndo, data),
1428 mask[0], mask[1], mask[2], mask[3],
1429 mask[4], mask[5], mask[6], mask[7],
1430 mask[8], mask[9], mask[10], mask[11],
1431 mask[12], mask[13], mask[14], mask[15]));
1432 }
1433 len = 0;
1434 break;
1435 }
1436 #endif /*INET6*/
1437 case IPSECDOI_ID_IPV4_ADDR_RANGE:
1438 if (len < 8)
1439 ND_PRINT((ndo," len=%d [bad: < 8]", len));
1440 else {
1441 ND_PRINT((ndo," len=%d %s-%s", len,
1442 ipaddr_string(ndo, data),
1443 ipaddr_string(ndo, data + sizeof(struct in_addr))));
1444 }
1445 len = 0;
1446 break;
1447 #ifdef INET6
1448 case IPSECDOI_ID_IPV6_ADDR_RANGE:
1449 if (len < 32)
1450 ND_PRINT((ndo," len=%d [bad: < 32]", len));
1451 else {
1452 ND_PRINT((ndo," len=%d %s-%s", len,
1453 ip6addr_string(ndo, data),
1454 ip6addr_string(ndo, data + sizeof(struct in6_addr))));
1455 }
1456 len = 0;
1457 break;
1458 #endif /*INET6*/
1459 case IPSECDOI_ID_DER_ASN1_DN:
1460 case IPSECDOI_ID_DER_ASN1_GN:
1461 case IPSECDOI_ID_KEY_ID:
1462 break;
1463 }
1464 break;
1465 }
1466 }
1467 if (data && len) {
1468 ND_PRINT((ndo," len=%d", len));
1469 if (2 < ndo->ndo_vflag) {
1470 ND_PRINT((ndo," "));
1471 if (!rawprint(ndo, (caddr_t)data, len))
1472 goto trunc;
1473 }
1474 }
1475 return (u_char *)ext + item_len;
1476 trunc:
1477 ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_ID)));
1478 return NULL;
1479 }
1480  
1481 static const u_char *
1482 ikev1_cert_print(netdissect_options *ndo, u_char tpay _U_,
1483 const struct isakmp_gen *ext, u_int item_len _U_,
1484 const u_char *ep _U_, uint32_t phase _U_,
1485 uint32_t doi0 _U_,
1486 uint32_t proto0 _U_, int depth _U_)
1487 {
1488 const struct ikev1_pl_cert *p;
1489 struct ikev1_pl_cert cert;
1490 static const char *certstr[] = {
1491 "none", "pkcs7", "pgp", "dns",
1492 "x509sign", "x509ke", "kerberos", "crl",
1493 "arl", "spki", "x509attr",
1494 };
1495  
1496 ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_CERT)));
1497  
1498 p = (struct ikev1_pl_cert *)ext;
1499 ND_TCHECK(*p);
1500 UNALIGNED_MEMCPY(&cert, ext, sizeof(cert));
1501 ND_PRINT((ndo," len=%d", item_len - 4));
1502 ND_PRINT((ndo," type=%s", STR_OR_ID((cert.encode), certstr)));
1503 if (2 < ndo->ndo_vflag && 4 < item_len) {
1504 ND_PRINT((ndo," "));
1505 if (!rawprint(ndo, (caddr_t)(ext + 1), item_len - 4))
1506 goto trunc;
1507 }
1508 return (u_char *)ext + item_len;
1509 trunc:
1510 ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_CERT)));
1511 return NULL;
1512 }
1513  
1514 static const u_char *
1515 ikev1_cr_print(netdissect_options *ndo, u_char tpay _U_,
1516 const struct isakmp_gen *ext, u_int item_len _U_,
1517 const u_char *ep _U_, uint32_t phase _U_, uint32_t doi0 _U_,
1518 uint32_t proto0 _U_, int depth _U_)
1519 {
1520 const struct ikev1_pl_cert *p;
1521 struct ikev1_pl_cert cert;
1522 static const char *certstr[] = {
1523 "none", "pkcs7", "pgp", "dns",
1524 "x509sign", "x509ke", "kerberos", "crl",
1525 "arl", "spki", "x509attr",
1526 };
1527  
1528 ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_CR)));
1529  
1530 p = (struct ikev1_pl_cert *)ext;
1531 ND_TCHECK(*p);
1532 UNALIGNED_MEMCPY(&cert, ext, sizeof(cert));
1533 ND_PRINT((ndo," len=%d", item_len - 4));
1534 ND_PRINT((ndo," type=%s", STR_OR_ID((cert.encode), certstr)));
1535 if (2 < ndo->ndo_vflag && 4 < item_len) {
1536 ND_PRINT((ndo," "));
1537 if (!rawprint(ndo, (caddr_t)(ext + 1), item_len - 4))
1538 goto trunc;
1539 }
1540 return (u_char *)ext + item_len;
1541 trunc:
1542 ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_CR)));
1543 return NULL;
1544 }
1545  
1546 static const u_char *
1547 ikev1_hash_print(netdissect_options *ndo, u_char tpay _U_,
1548 const struct isakmp_gen *ext, u_int item_len _U_,
1549 const u_char *ep _U_, uint32_t phase _U_, uint32_t doi _U_,
1550 uint32_t proto _U_, int depth _U_)
1551 {
1552 struct isakmp_gen e;
1553  
1554 ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_HASH)));
1555  
1556 ND_TCHECK(*ext);
1557 UNALIGNED_MEMCPY(&e, ext, sizeof(e));
1558 ND_PRINT((ndo," len=%d", ntohs(e.len) - 4));
1559 if (2 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
1560 ND_PRINT((ndo," "));
1561 if (!rawprint(ndo, (caddr_t)(ext + 1), ntohs(e.len) - 4))
1562 goto trunc;
1563 }
1564 return (u_char *)ext + ntohs(e.len);
1565 trunc:
1566 ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_HASH)));
1567 return NULL;
1568 }
1569  
1570 static const u_char *
1571 ikev1_sig_print(netdissect_options *ndo, u_char tpay _U_,
1572 const struct isakmp_gen *ext, u_int item_len _U_,
1573 const u_char *ep _U_, uint32_t phase _U_, uint32_t doi _U_,
1574 uint32_t proto _U_, int depth _U_)
1575 {
1576 struct isakmp_gen e;
1577  
1578 ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_SIG)));
1579  
1580 ND_TCHECK(*ext);
1581 UNALIGNED_MEMCPY(&e, ext, sizeof(e));
1582 ND_PRINT((ndo," len=%d", ntohs(e.len) - 4));
1583 if (2 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
1584 ND_PRINT((ndo," "));
1585 if (!rawprint(ndo, (caddr_t)(ext + 1), ntohs(e.len) - 4))
1586 goto trunc;
1587 }
1588 return (u_char *)ext + ntohs(e.len);
1589 trunc:
1590 ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_SIG)));
1591 return NULL;
1592 }
1593  
1594 static const u_char *
1595 ikev1_nonce_print(netdissect_options *ndo, u_char tpay _U_,
1596 const struct isakmp_gen *ext,
1597 u_int item_len _U_,
1598 const u_char *ep _U_,
1599 uint32_t phase _U_, uint32_t doi _U_,
1600 uint32_t proto _U_, int depth _U_)
1601 {
1602 struct isakmp_gen e;
1603  
1604 ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_NONCE)));
1605  
1606 ND_TCHECK(*ext);
1607 UNALIGNED_MEMCPY(&e, ext, sizeof(e));
1608 ND_PRINT((ndo," n len=%d", ntohs(e.len) - 4));
1609 if (2 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
1610 ND_PRINT((ndo," "));
1611 if (!rawprint(ndo, (caddr_t)(ext + 1), ntohs(e.len) - 4))
1612 goto trunc;
1613 } else if (1 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
1614 ND_PRINT((ndo," "));
1615 if (!ike_show_somedata(ndo, (u_char *)(caddr_t)(ext + 1), ep))
1616 goto trunc;
1617 }
1618 return (u_char *)ext + ntohs(e.len);
1619 trunc:
1620 ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_NONCE)));
1621 return NULL;
1622 }
1623  
1624 static const u_char *
1625 ikev1_n_print(netdissect_options *ndo, u_char tpay _U_,
1626 const struct isakmp_gen *ext, u_int item_len,
1627 const u_char *ep, uint32_t phase, uint32_t doi0 _U_,
1628 uint32_t proto0 _U_, int depth)
1629 {
1630 struct ikev1_pl_n *p, n;
1631 const u_char *cp;
1632 u_char *ep2;
1633 uint32_t doi;
1634 uint32_t proto;
1635 static const char *notify_error_str[] = {
1636 NULL, "INVALID-PAYLOAD-TYPE",
1637 "DOI-NOT-SUPPORTED", "SITUATION-NOT-SUPPORTED",
1638 "INVALID-COOKIE", "INVALID-MAJOR-VERSION",
1639 "INVALID-MINOR-VERSION", "INVALID-EXCHANGE-TYPE",
1640 "INVALID-FLAGS", "INVALID-MESSAGE-ID",
1641 "INVALID-PROTOCOL-ID", "INVALID-SPI",
1642 "INVALID-TRANSFORM-ID", "ATTRIBUTES-NOT-SUPPORTED",
1643 "NO-PROPOSAL-CHOSEN", "BAD-PROPOSAL-SYNTAX",
1644 "PAYLOAD-MALFORMED", "INVALID-KEY-INFORMATION",
1645 "INVALID-ID-INFORMATION", "INVALID-CERT-ENCODING",
1646 "INVALID-CERTIFICATE", "CERT-TYPE-UNSUPPORTED",
1647 "INVALID-CERT-AUTHORITY", "INVALID-HASH-INFORMATION",
1648 "AUTHENTICATION-FAILED", "INVALID-SIGNATURE",
1649 "ADDRESS-NOTIFICATION", "NOTIFY-SA-LIFETIME",
1650 "CERTIFICATE-UNAVAILABLE", "UNSUPPORTED-EXCHANGE-TYPE",
1651 "UNEQUAL-PAYLOAD-LENGTHS",
1652 };
1653 static const char *ipsec_notify_error_str[] = {
1654 "RESERVED",
1655 };
1656 static const char *notify_status_str[] = {
1657 "CONNECTED",
1658 };
1659 static const char *ipsec_notify_status_str[] = {
1660 "RESPONDER-LIFETIME", "REPLAY-STATUS",
1661 "INITIAL-CONTACT",
1662 };
1663 /* NOTE: these macro must be called with x in proper range */
1664  
1665 /* 0 - 8191 */
1666 #define NOTIFY_ERROR_STR(x) \
1667 STR_OR_ID((x), notify_error_str)
1668  
1669 /* 8192 - 16383 */
1670 #define IPSEC_NOTIFY_ERROR_STR(x) \
1671 STR_OR_ID((u_int)((x) - 8192), ipsec_notify_error_str)
1672  
1673 /* 16384 - 24575 */
1674 #define NOTIFY_STATUS_STR(x) \
1675 STR_OR_ID((u_int)((x) - 16384), notify_status_str)
1676  
1677 /* 24576 - 32767 */
1678 #define IPSEC_NOTIFY_STATUS_STR(x) \
1679 STR_OR_ID((u_int)((x) - 24576), ipsec_notify_status_str)
1680  
1681 ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_N)));
1682  
1683 p = (struct ikev1_pl_n *)ext;
1684 ND_TCHECK(*p);
1685 UNALIGNED_MEMCPY(&n, ext, sizeof(n));
1686 doi = ntohl(n.doi);
1687 proto = n.prot_id;
1688 if (doi != 1) {
1689 ND_PRINT((ndo," doi=%d", doi));
1690 ND_PRINT((ndo," proto=%d", proto));
1691 if (ntohs(n.type) < 8192)
1692 ND_PRINT((ndo," type=%s", NOTIFY_ERROR_STR(ntohs(n.type))));
1693 else if (ntohs(n.type) < 16384)
1694 ND_PRINT((ndo," type=%s", numstr(ntohs(n.type))));
1695 else if (ntohs(n.type) < 24576)
1696 ND_PRINT((ndo," type=%s", NOTIFY_STATUS_STR(ntohs(n.type))));
1697 else
1698 ND_PRINT((ndo," type=%s", numstr(ntohs(n.type))));
1699 if (n.spi_size) {
1700 ND_PRINT((ndo," spi="));
1701 if (!rawprint(ndo, (caddr_t)(p + 1), n.spi_size))
1702 goto trunc;
1703 }
1704 return (u_char *)(p + 1) + n.spi_size;
1705 }
1706  
1707 ND_PRINT((ndo," doi=ipsec"));
1708 ND_PRINT((ndo," proto=%s", PROTOIDSTR(proto)));
1709 if (ntohs(n.type) < 8192)
1710 ND_PRINT((ndo," type=%s", NOTIFY_ERROR_STR(ntohs(n.type))));
1711 else if (ntohs(n.type) < 16384)
1712 ND_PRINT((ndo," type=%s", IPSEC_NOTIFY_ERROR_STR(ntohs(n.type))));
1713 else if (ntohs(n.type) < 24576)
1714 ND_PRINT((ndo," type=%s", NOTIFY_STATUS_STR(ntohs(n.type))));
1715 else if (ntohs(n.type) < 32768)
1716 ND_PRINT((ndo," type=%s", IPSEC_NOTIFY_STATUS_STR(ntohs(n.type))));
1717 else
1718 ND_PRINT((ndo," type=%s", numstr(ntohs(n.type))));
1719 if (n.spi_size) {
1720 ND_PRINT((ndo," spi="));
1721 if (!rawprint(ndo, (caddr_t)(p + 1), n.spi_size))
1722 goto trunc;
1723 }
1724  
1725 cp = (u_char *)(p + 1) + n.spi_size;
1726 ep2 = (u_char *)p + item_len;
1727  
1728 if (cp < ep) {
1729 ND_PRINT((ndo," orig=("));
1730 switch (ntohs(n.type)) {
1731 case IPSECDOI_NTYPE_RESPONDER_LIFETIME:
1732 {
1733 const struct attrmap *map = oakley_t_map;
1734 size_t nmap = sizeof(oakley_t_map)/sizeof(oakley_t_map[0]);
1735 while (cp < ep && cp < ep2) {
1736 cp = ikev1_attrmap_print(ndo, cp,
1737 (ep < ep2) ? ep : ep2, map, nmap);
1738 }
1739 break;
1740 }
1741 case IPSECDOI_NTYPE_REPLAY_STATUS:
1742 ND_PRINT((ndo,"replay detection %sabled",
1743 EXTRACT_32BITS(cp) ? "en" : "dis"));
1744 break;
1745 case ISAKMP_NTYPE_NO_PROPOSAL_CHOSEN:
1746 if (ikev1_sub_print(ndo, ISAKMP_NPTYPE_SA,
1747 (struct isakmp_gen *)cp, ep, phase, doi, proto,
1748 depth) == NULL)
1749 return NULL;
1750 break;
1751 default:
1752 /* NULL is dummy */
1753 isakmp_print(ndo, cp,
1754 item_len - sizeof(*p) - n.spi_size,
1755 NULL);
1756 }
1757 ND_PRINT((ndo,")"));
1758 }
1759 return (u_char *)ext + item_len;
1760 trunc:
1761 ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_N)));
1762 return NULL;
1763 }
1764  
1765 static const u_char *
1766 ikev1_d_print(netdissect_options *ndo, u_char tpay _U_,
1767 const struct isakmp_gen *ext, u_int item_len _U_,
1768 const u_char *ep _U_, uint32_t phase _U_, uint32_t doi0 _U_,
1769 uint32_t proto0 _U_, int depth _U_)
1770 {
1771 const struct ikev1_pl_d *p;
1772 struct ikev1_pl_d d;
1773 const uint8_t *q;
1774 uint32_t doi;
1775 uint32_t proto;
1776 int i;
1777  
1778 ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_D)));
1779  
1780 p = (struct ikev1_pl_d *)ext;
1781 ND_TCHECK(*p);
1782 UNALIGNED_MEMCPY(&d, ext, sizeof(d));
1783 doi = ntohl(d.doi);
1784 proto = d.prot_id;
1785 if (doi != 1) {
1786 ND_PRINT((ndo," doi=%u", doi));
1787 ND_PRINT((ndo," proto=%u", proto));
1788 } else {
1789 ND_PRINT((ndo," doi=ipsec"));
1790 ND_PRINT((ndo," proto=%s", PROTOIDSTR(proto)));
1791 }
1792 ND_PRINT((ndo," spilen=%u", d.spi_size));
1793 ND_PRINT((ndo," nspi=%u", ntohs(d.num_spi)));
1794 ND_PRINT((ndo," spi="));
1795 q = (uint8_t *)(p + 1);
1796 for (i = 0; i < ntohs(d.num_spi); i++) {
1797 if (i != 0)
1798 ND_PRINT((ndo,","));
1799 if (!rawprint(ndo, (caddr_t)q, d.spi_size))
1800 goto trunc;
1801 q += d.spi_size;
1802 }
1803 return q;
1804 trunc:
1805 ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_D)));
1806 return NULL;
1807 }
1808  
1809 static const u_char *
1810 ikev1_vid_print(netdissect_options *ndo, u_char tpay _U_,
1811 const struct isakmp_gen *ext,
1812 u_int item_len _U_, const u_char *ep _U_,
1813 uint32_t phase _U_, uint32_t doi _U_,
1814 uint32_t proto _U_, int depth _U_)
1815 {
1816 struct isakmp_gen e;
1817  
1818 ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_VID)));
1819  
1820 ND_TCHECK(*ext);
1821 UNALIGNED_MEMCPY(&e, ext, sizeof(e));
1822 ND_PRINT((ndo," len=%d", ntohs(e.len) - 4));
1823 if (2 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
1824 ND_PRINT((ndo," "));
1825 if (!rawprint(ndo, (caddr_t)(ext + 1), ntohs(e.len) - 4))
1826 goto trunc;
1827 }
1828 return (u_char *)ext + ntohs(e.len);
1829 trunc:
1830 ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_VID)));
1831 return NULL;
1832 }
1833  
1834 /************************************************************/
1835 /* */
1836 /* IKE v2 - rfc4306 - dissector */
1837 /* */
1838 /************************************************************/
1839  
1840 static void
1841 ikev2_pay_print(netdissect_options *ndo, const char *payname, int critical)
1842 {
1843 ND_PRINT((ndo,"%s%s:", payname, critical&0x80 ? "[C]" : ""));
1844 }
1845  
1846 static const u_char *
1847 ikev2_gen_print(netdissect_options *ndo, u_char tpay,
1848 const struct isakmp_gen *ext)
1849 {
1850 struct isakmp_gen e;
1851  
1852 ND_TCHECK(*ext);
1853 UNALIGNED_MEMCPY(&e, ext, sizeof(e));
1854 ikev2_pay_print(ndo, NPSTR(tpay), e.critical);
1855  
1856 ND_PRINT((ndo," len=%d", ntohs(e.len) - 4));
1857 if (2 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
1858 ND_PRINT((ndo," "));
1859 if (!rawprint(ndo, (caddr_t)(ext + 1), ntohs(e.len) - 4))
1860 goto trunc;
1861 }
1862 return (u_char *)ext + ntohs(e.len);
1863 trunc:
1864 ND_PRINT((ndo," [|%s]", NPSTR(tpay)));
1865 return NULL;
1866 }
1867  
1868 static const u_char *
1869 ikev2_t_print(netdissect_options *ndo, u_char tpay _U_, int pcount,
1870 const struct isakmp_gen *ext, u_int item_len,
1871 const u_char *ep, uint32_t phase _U_, uint32_t doi _U_,
1872 uint32_t proto _U_, int depth _U_)
1873 {
1874 const struct ikev2_t *p;
1875 struct ikev2_t t;
1876 uint16_t t_id;
1877 const u_char *cp;
1878 const char *idstr;
1879 const struct attrmap *map;
1880 size_t nmap;
1881 const u_char *ep2;
1882  
1883 p = (struct ikev2_t *)ext;
1884 ND_TCHECK(*p);
1885 UNALIGNED_MEMCPY(&t, ext, sizeof(t));
1886 ikev2_pay_print(ndo, NPSTR(ISAKMP_NPTYPE_T), t.h.critical);
1887  
1888 t_id = ntohs(t.t_id);
1889  
1890 map = NULL;
1891 nmap = 0;
1892  
1893 switch (t.t_type) {
1894 case IV2_T_ENCR:
1895 idstr = STR_OR_ID(t_id, esp_p_map);
1896 map = encr_t_map;
1897 nmap = sizeof(encr_t_map)/sizeof(encr_t_map[0]);
1898 break;
1899  
1900 case IV2_T_PRF:
1901 idstr = STR_OR_ID(t_id, prf_p_map);
1902 break;
1903  
1904 case IV2_T_INTEG:
1905 idstr = STR_OR_ID(t_id, integ_p_map);
1906 break;
1907  
1908 case IV2_T_DH:
1909 idstr = STR_OR_ID(t_id, dh_p_map);
1910 break;
1911  
1912 case IV2_T_ESN:
1913 idstr = STR_OR_ID(t_id, esn_p_map);
1914 break;
1915  
1916 default:
1917 idstr = NULL;
1918 break;
1919 }
1920  
1921 if (idstr)
1922 ND_PRINT((ndo," #%u type=%s id=%s ", pcount,
1923 STR_OR_ID(t.t_type, ikev2_t_type_map),
1924 idstr));
1925 else
1926 ND_PRINT((ndo," #%u type=%s id=%u ", pcount,
1927 STR_OR_ID(t.t_type, ikev2_t_type_map),
1928 t.t_id));
1929 cp = (u_char *)(p + 1);
1930 ep2 = (u_char *)p + item_len;
1931 while (cp < ep && cp < ep2) {
1932 if (map && nmap) {
1933 cp = ikev1_attrmap_print(ndo, cp, (ep < ep2) ? ep : ep2,
1934 map, nmap);
1935 } else
1936 cp = ikev1_attr_print(ndo, cp, (ep < ep2) ? ep : ep2);
1937 }
1938 if (ep < ep2)
1939 ND_PRINT((ndo,"..."));
1940 return cp;
1941 trunc:
1942 ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_T)));
1943 return NULL;
1944 }
1945  
1946 static const u_char *
1947 ikev2_p_print(netdissect_options *ndo, u_char tpay _U_, int pcount _U_,
1948 const struct isakmp_gen *ext, u_int item_len _U_,
1949 const u_char *ep, uint32_t phase, uint32_t doi0,
1950 uint32_t proto0 _U_, int depth)
1951 {
1952 const struct ikev2_p *p;
1953 struct ikev2_p prop;
1954 const u_char *cp;
1955  
1956 p = (struct ikev2_p *)ext;
1957 ND_TCHECK(*p);
1958 UNALIGNED_MEMCPY(&prop, ext, sizeof(prop));
1959 ikev2_pay_print(ndo, NPSTR(ISAKMP_NPTYPE_P), prop.h.critical);
1960  
1961 ND_PRINT((ndo," #%u protoid=%s transform=%d len=%u",
1962 prop.p_no, PROTOIDSTR(prop.prot_id),
1963 prop.num_t, ntohs(prop.h.len)));
1964 if (prop.spi_size) {
1965 ND_PRINT((ndo," spi="));
1966 if (!rawprint(ndo, (caddr_t)(p + 1), prop.spi_size))
1967 goto trunc;
1968 }
1969  
1970 ext = (struct isakmp_gen *)((u_char *)(p + 1) + prop.spi_size);
1971 ND_TCHECK(*ext);
1972  
1973 cp = ikev2_sub_print(ndo, NULL, ISAKMP_NPTYPE_T, ext, ep, phase, doi0,
1974 prop.prot_id, depth);
1975  
1976 return cp;
1977 trunc:
1978 ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_P)));
1979 return NULL;
1980 }
1981  
1982 static const u_char *
1983 ikev2_sa_print(netdissect_options *ndo, u_char tpay,
1984 const struct isakmp_gen *ext1,
1985 u_int item_len _U_, const u_char *ep _U_,
1986 uint32_t phase _U_, uint32_t doi _U_,
1987 uint32_t proto _U_, int depth _U_)
1988 {
1989 struct isakmp_gen e;
1990 int osa_length, sa_length;
1991  
1992 ND_TCHECK(*ext1);
1993 UNALIGNED_MEMCPY(&e, ext1, sizeof(e));
1994 ikev2_pay_print(ndo, "sa", e.critical);
1995  
1996 osa_length= ntohs(e.len);
1997 sa_length = osa_length - 4;
1998 ND_PRINT((ndo," len=%d", sa_length));
1999  
2000 ikev2_sub_print(ndo, NULL, ISAKMP_NPTYPE_P,
2001 ext1+1, ep,
2002 0, 0, 0, depth);
2003  
2004 return (u_char *)ext1 + osa_length;
2005 trunc:
2006 ND_PRINT((ndo," [|%s]", NPSTR(tpay)));
2007 return NULL;
2008 }
2009  
2010 static const u_char *
2011 ikev2_ke_print(netdissect_options *ndo, u_char tpay,
2012 const struct isakmp_gen *ext,
2013 u_int item_len _U_, const u_char *ep _U_,
2014 uint32_t phase _U_, uint32_t doi _U_,
2015 uint32_t proto _U_, int depth _U_)
2016 {
2017 struct ikev2_ke ke;
2018 struct ikev2_ke *k;
2019  
2020 k = (struct ikev2_ke *)ext;
2021 ND_TCHECK(*ext);
2022 UNALIGNED_MEMCPY(&ke, ext, sizeof(ke));
2023 ikev2_pay_print(ndo, NPSTR(tpay), ke.h.critical);
2024  
2025 ND_PRINT((ndo," len=%u group=%s", ntohs(ke.h.len) - 8,
2026 STR_OR_ID(ntohs(ke.ke_group), dh_p_map)));
2027  
2028 if (2 < ndo->ndo_vflag && 8 < ntohs(ke.h.len)) {
2029 ND_PRINT((ndo," "));
2030 if (!rawprint(ndo, (caddr_t)(k + 1), ntohs(ke.h.len) - 8))
2031 goto trunc;
2032 }
2033 return (u_char *)ext + ntohs(ke.h.len);
2034 trunc:
2035 ND_PRINT((ndo," [|%s]", NPSTR(tpay)));
2036 return NULL;
2037 }
2038  
2039 static const u_char *
2040 ikev2_ID_print(netdissect_options *ndo, u_char tpay,
2041 const struct isakmp_gen *ext,
2042 u_int item_len _U_, const u_char *ep _U_,
2043 uint32_t phase _U_, uint32_t doi _U_,
2044 uint32_t proto _U_, int depth _U_)
2045 {
2046 struct ikev2_id id;
2047 int id_len, idtype_len, i;
2048 unsigned int dumpascii, dumphex;
2049 unsigned char *typedata;
2050  
2051 ND_TCHECK(*ext);
2052 UNALIGNED_MEMCPY(&id, ext, sizeof(id));
2053 ikev2_pay_print(ndo, NPSTR(tpay), id.h.critical);
2054  
2055 id_len = ntohs(id.h.len);
2056  
2057 ND_PRINT((ndo," len=%d", id_len - 4));
2058 if (2 < ndo->ndo_vflag && 4 < id_len) {
2059 ND_PRINT((ndo," "));
2060 if (!rawprint(ndo, (caddr_t)(ext + 1), id_len - 4))
2061 goto trunc;
2062 }
2063  
2064 idtype_len =id_len - sizeof(struct ikev2_id);
2065 dumpascii = 0;
2066 dumphex = 0;
2067 typedata = (unsigned char *)(ext)+sizeof(struct ikev2_id);
2068  
2069 switch(id.type) {
2070 case ID_IPV4_ADDR:
2071 ND_PRINT((ndo, " ipv4:"));
2072 dumphex=1;
2073 break;
2074 case ID_FQDN:
2075 ND_PRINT((ndo, " fqdn:"));
2076 dumpascii=1;
2077 break;
2078 case ID_RFC822_ADDR:
2079 ND_PRINT((ndo, " rfc822:"));
2080 dumpascii=1;
2081 break;
2082 case ID_IPV6_ADDR:
2083 ND_PRINT((ndo, " ipv6:"));
2084 dumphex=1;
2085 break;
2086 case ID_DER_ASN1_DN:
2087 ND_PRINT((ndo, " dn:"));
2088 dumphex=1;
2089 break;
2090 case ID_DER_ASN1_GN:
2091 ND_PRINT((ndo, " gn:"));
2092 dumphex=1;
2093 break;
2094 case ID_KEY_ID:
2095 ND_PRINT((ndo, " keyid:"));
2096 dumphex=1;
2097 break;
2098 }
2099  
2100 if(dumpascii) {
2101 ND_TCHECK2(*typedata, idtype_len);
2102 for(i=0; i<idtype_len; i++) {
2103 if(ND_ISPRINT(typedata[i])) {
2104 ND_PRINT((ndo, "%c", typedata[i]));
2105 } else {
2106 ND_PRINT((ndo, "."));
2107 }
2108 }
2109 }
2110 if(dumphex) {
2111 if (!rawprint(ndo, (caddr_t)typedata, idtype_len))
2112 goto trunc;
2113 }
2114  
2115 return (u_char *)ext + id_len;
2116 trunc:
2117 ND_PRINT((ndo," [|%s]", NPSTR(tpay)));
2118 return NULL;
2119 }
2120  
2121 static const u_char *
2122 ikev2_cert_print(netdissect_options *ndo, u_char tpay,
2123 const struct isakmp_gen *ext,
2124 u_int item_len _U_, const u_char *ep _U_,
2125 uint32_t phase _U_, uint32_t doi _U_,
2126 uint32_t proto _U_, int depth _U_)
2127 {
2128 return ikev2_gen_print(ndo, tpay, ext);
2129 }
2130  
2131 static const u_char *
2132 ikev2_cr_print(netdissect_options *ndo, u_char tpay,
2133 const struct isakmp_gen *ext,
2134 u_int item_len _U_, const u_char *ep _U_,
2135 uint32_t phase _U_, uint32_t doi _U_,
2136 uint32_t proto _U_, int depth _U_)
2137 {
2138 return ikev2_gen_print(ndo, tpay, ext);
2139 }
2140  
2141 static const u_char *
2142 ikev2_auth_print(netdissect_options *ndo, u_char tpay,
2143 const struct isakmp_gen *ext,
2144 u_int item_len _U_, const u_char *ep _U_,
2145 uint32_t phase _U_, uint32_t doi _U_,
2146 uint32_t proto _U_, int depth _U_)
2147 {
2148 struct ikev2_auth a;
2149 const char *v2_auth[]={ "invalid", "rsasig",
2150 "shared-secret", "dsssig" };
2151 u_char *authdata = (u_char*)ext + sizeof(a);
2152 unsigned int len;
2153  
2154 ND_TCHECK(*ext);
2155 UNALIGNED_MEMCPY(&a, ext, sizeof(a));
2156 ikev2_pay_print(ndo, NPSTR(tpay), a.h.critical);
2157 len = ntohs(a.h.len);
2158  
2159 ND_PRINT((ndo," len=%d method=%s", len-4,
2160 STR_OR_ID(a.auth_method, v2_auth)));
2161  
2162 if (1 < ndo->ndo_vflag && 4 < len) {
2163 ND_PRINT((ndo," authdata=("));
2164 if (!rawprint(ndo, (caddr_t)authdata, len - sizeof(a)))
2165 goto trunc;
2166 ND_PRINT((ndo,") "));
2167 } else if(ndo->ndo_vflag && 4 < len) {
2168 if(!ike_show_somedata(ndo, authdata, ep)) goto trunc;
2169 }
2170  
2171 return (u_char *)ext + len;
2172 trunc:
2173 ND_PRINT((ndo," [|%s]", NPSTR(tpay)));
2174 return NULL;
2175 }
2176  
2177 static const u_char *
2178 ikev2_nonce_print(netdissect_options *ndo, u_char tpay,
2179 const struct isakmp_gen *ext,
2180 u_int item_len _U_, const u_char *ep _U_,
2181 uint32_t phase _U_, uint32_t doi _U_,
2182 uint32_t proto _U_, int depth _U_)
2183 {
2184 struct isakmp_gen e;
2185  
2186 ND_TCHECK(*ext);
2187 UNALIGNED_MEMCPY(&e, ext, sizeof(e));
2188 ikev2_pay_print(ndo, "nonce", e.critical);
2189  
2190 ND_PRINT((ndo," len=%d", ntohs(e.len) - 4));
2191 if (1 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
2192 ND_PRINT((ndo," nonce=("));
2193 if (!rawprint(ndo, (caddr_t)(ext + 1), ntohs(e.len) - 4))
2194 goto trunc;
2195 ND_PRINT((ndo,") "));
2196 } else if(ndo->ndo_vflag && 4 < ntohs(e.len)) {
2197 if(!ike_show_somedata(ndo, (const u_char *)(ext+1), ep)) goto trunc;
2198 }
2199  
2200 return (u_char *)ext + ntohs(e.len);
2201 trunc:
2202 ND_PRINT((ndo," [|%s]", NPSTR(tpay)));
2203 return NULL;
2204 }
2205  
2206 /* notify payloads */
2207 static const u_char *
2208 ikev2_n_print(netdissect_options *ndo, u_char tpay _U_,
2209 const struct isakmp_gen *ext,
2210 u_int item_len _U_, const u_char *ep _U_,
2211 uint32_t phase _U_, uint32_t doi _U_,
2212 uint32_t proto _U_, int depth _U_)
2213 {
2214 struct ikev2_n *p, n;
2215 const u_char *cp;
2216 u_char showspi, showdata, showsomedata;
2217 const char *notify_name;
2218 uint32_t type;
2219  
2220 p = (struct ikev2_n *)ext;
2221 ND_TCHECK(*p);
2222 UNALIGNED_MEMCPY(&n, ext, sizeof(n));
2223 ikev2_pay_print(ndo, NPSTR(ISAKMP_NPTYPE_N), n.h.critical);
2224  
2225 showspi = 1;
2226 showdata = 0;
2227 showsomedata=0;
2228 notify_name=NULL;
2229  
2230 ND_PRINT((ndo," prot_id=%s", PROTOIDSTR(n.prot_id)));
2231  
2232 type = ntohs(n.type);
2233  
2234 /* notify space is annoying sparse */
2235 switch(type) {
2236 case IV2_NOTIFY_UNSUPPORTED_CRITICAL_PAYLOAD:
2237 notify_name = "unsupported_critical_payload";
2238 showspi = 0;
2239 break;
2240  
2241 case IV2_NOTIFY_INVALID_IKE_SPI:
2242 notify_name = "invalid_ike_spi";
2243 showspi = 1;
2244 break;
2245  
2246 case IV2_NOTIFY_INVALID_MAJOR_VERSION:
2247 notify_name = "invalid_major_version";
2248 showspi = 0;
2249 break;
2250  
2251 case IV2_NOTIFY_INVALID_SYNTAX:
2252 notify_name = "invalid_syntax";
2253 showspi = 1;
2254 break;
2255  
2256 case IV2_NOTIFY_INVALID_MESSAGE_ID:
2257 notify_name = "invalid_message_id";
2258 showspi = 1;
2259 break;
2260  
2261 case IV2_NOTIFY_INVALID_SPI:
2262 notify_name = "invalid_spi";
2263 showspi = 1;
2264 break;
2265  
2266 case IV2_NOTIFY_NO_PROPOSAL_CHOSEN:
2267 notify_name = "no_protocol_chosen";
2268 showspi = 1;
2269 break;
2270  
2271 case IV2_NOTIFY_INVALID_KE_PAYLOAD:
2272 notify_name = "invalid_ke_payload";
2273 showspi = 1;
2274 break;
2275  
2276 case IV2_NOTIFY_AUTHENTICATION_FAILED:
2277 notify_name = "authentication_failed";
2278 showspi = 1;
2279 break;
2280  
2281 case IV2_NOTIFY_SINGLE_PAIR_REQUIRED:
2282 notify_name = "single_pair_required";
2283 showspi = 1;
2284 break;
2285  
2286 case IV2_NOTIFY_NO_ADDITIONAL_SAS:
2287 notify_name = "no_additional_sas";
2288 showspi = 0;
2289 break;
2290  
2291 case IV2_NOTIFY_INTERNAL_ADDRESS_FAILURE:
2292 notify_name = "internal_address_failure";
2293 showspi = 0;
2294 break;
2295  
2296 case IV2_NOTIFY_FAILED_CP_REQUIRED:
2297 notify_name = "failed:cp_required";
2298 showspi = 0;
2299 break;
2300  
2301 case IV2_NOTIFY_INVALID_SELECTORS:
2302 notify_name = "invalid_selectors";
2303 showspi = 0;
2304 break;
2305  
2306 case IV2_NOTIFY_INITIAL_CONTACT:
2307 notify_name = "initial_contact";
2308 showspi = 0;
2309 break;
2310  
2311 case IV2_NOTIFY_SET_WINDOW_SIZE:
2312 notify_name = "set_window_size";
2313 showspi = 0;
2314 break;
2315  
2316 case IV2_NOTIFY_ADDITIONAL_TS_POSSIBLE:
2317 notify_name = "additional_ts_possible";
2318 showspi = 0;
2319 break;
2320  
2321 case IV2_NOTIFY_IPCOMP_SUPPORTED:
2322 notify_name = "ipcomp_supported";
2323 showspi = 0;
2324 break;
2325  
2326 case IV2_NOTIFY_NAT_DETECTION_SOURCE_IP:
2327 notify_name = "nat_detection_source_ip";
2328 showspi = 1;
2329 break;
2330  
2331 case IV2_NOTIFY_NAT_DETECTION_DESTINATION_IP:
2332 notify_name = "nat_detection_destination_ip";
2333 showspi = 1;
2334 break;
2335  
2336 case IV2_NOTIFY_COOKIE:
2337 notify_name = "cookie";
2338 showspi = 1;
2339 showsomedata= 1;
2340 showdata= 0;
2341 break;
2342  
2343 case IV2_NOTIFY_USE_TRANSPORT_MODE:
2344 notify_name = "use_transport_mode";
2345 showspi = 0;
2346 break;
2347  
2348 case IV2_NOTIFY_HTTP_CERT_LOOKUP_SUPPORTED:
2349 notify_name = "http_cert_lookup_supported";
2350 showspi = 0;
2351 break;
2352  
2353 case IV2_NOTIFY_REKEY_SA:
2354 notify_name = "rekey_sa";
2355 showspi = 1;
2356 break;
2357  
2358 case IV2_NOTIFY_ESP_TFC_PADDING_NOT_SUPPORTED:
2359 notify_name = "tfc_padding_not_supported";
2360 showspi = 0;
2361 break;
2362  
2363 case IV2_NOTIFY_NON_FIRST_FRAGMENTS_ALSO:
2364 notify_name = "non_first_fragment_also";
2365 showspi = 0;
2366 break;
2367  
2368 default:
2369 if (type < 8192) {
2370 notify_name="error";
2371 } else if(type < 16384) {
2372 notify_name="private-error";
2373 } else if(type < 40960) {
2374 notify_name="status";
2375 } else {
2376 notify_name="private-status";
2377 }
2378 }
2379  
2380 if(notify_name) {
2381 ND_PRINT((ndo," type=%u(%s)", type, notify_name));
2382 }
2383  
2384  
2385 if (showspi && n.spi_size) {
2386 ND_PRINT((ndo," spi="));
2387 if (!rawprint(ndo, (caddr_t)(p + 1), n.spi_size))
2388 goto trunc;
2389 }
2390  
2391 cp = (u_char *)(p + 1) + n.spi_size;
2392  
2393 if(3 < ndo->ndo_vflag) {
2394 showdata = 1;
2395 }
2396  
2397 if ((showdata || (showsomedata && ep-cp < 30)) && cp < ep) {
2398 ND_PRINT((ndo," data=("));
2399 if (!rawprint(ndo, (caddr_t)(cp), ep - cp))
2400 goto trunc;
2401  
2402 ND_PRINT((ndo,")"));
2403  
2404 } else if(showsomedata && cp < ep) {
2405 if(!ike_show_somedata(ndo, cp, ep)) goto trunc;
2406 }
2407  
2408 return (u_char *)ext + item_len;
2409 trunc:
2410 ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_N)));
2411 return NULL;
2412 }
2413  
2414 static const u_char *
2415 ikev2_d_print(netdissect_options *ndo, u_char tpay,
2416 const struct isakmp_gen *ext,
2417 u_int item_len _U_, const u_char *ep _U_,
2418 uint32_t phase _U_, uint32_t doi _U_,
2419 uint32_t proto _U_, int depth _U_)
2420 {
2421 return ikev2_gen_print(ndo, tpay, ext);
2422 }
2423  
2424 static const u_char *
2425 ikev2_vid_print(netdissect_options *ndo, u_char tpay,
2426 const struct isakmp_gen *ext,
2427 u_int item_len _U_, const u_char *ep _U_,
2428 uint32_t phase _U_, uint32_t doi _U_,
2429 uint32_t proto _U_, int depth _U_)
2430 {
2431 struct isakmp_gen e;
2432 const u_char *vid;
2433 int i, len;
2434  
2435 ND_TCHECK(*ext);
2436 UNALIGNED_MEMCPY(&e, ext, sizeof(e));
2437 ikev2_pay_print(ndo, NPSTR(tpay), e.critical);
2438 ND_PRINT((ndo," len=%d vid=", ntohs(e.len) - 4));
2439  
2440 vid = (const u_char *)(ext+1);
2441 len = ntohs(e.len) - 4;
2442 ND_TCHECK2(*vid, len);
2443 for(i=0; i<len; i++) {
2444 if(ND_ISPRINT(vid[i])) ND_PRINT((ndo, "%c", vid[i]));
2445 else ND_PRINT((ndo, "."));
2446 }
2447 if (2 < ndo->ndo_vflag && 4 < len) {
2448 ND_PRINT((ndo," "));
2449 if (!rawprint(ndo, (caddr_t)(ext + 1), ntohs(e.len) - 4))
2450 goto trunc;
2451 }
2452 return (u_char *)ext + ntohs(e.len);
2453 trunc:
2454 ND_PRINT((ndo," [|%s]", NPSTR(tpay)));
2455 return NULL;
2456 }
2457  
2458 static const u_char *
2459 ikev2_TS_print(netdissect_options *ndo, u_char tpay,
2460 const struct isakmp_gen *ext,
2461 u_int item_len _U_, const u_char *ep _U_,
2462 uint32_t phase _U_, uint32_t doi _U_,
2463 uint32_t proto _U_, int depth _U_)
2464 {
2465 return ikev2_gen_print(ndo, tpay, ext);
2466 }
2467  
2468 static const u_char *
2469 ikev2_e_print(netdissect_options *ndo,
2470 #ifndef HAVE_LIBCRYPTO
2471 _U_
2472 #endif
2473 struct isakmp *base,
2474 u_char tpay,
2475 const struct isakmp_gen *ext,
2476 u_int item_len _U_, const u_char *ep _U_,
2477 #ifndef HAVE_LIBCRYPTO
2478 _U_
2479 #endif
2480 uint32_t phase,
2481 #ifndef HAVE_LIBCRYPTO
2482 _U_
2483 #endif
2484 uint32_t doi,
2485 #ifndef HAVE_LIBCRYPTO
2486 _U_
2487 #endif
2488 uint32_t proto,
2489 #ifndef HAVE_LIBCRYPTO
2490 _U_
2491 #endif
2492 int depth)
2493 {
2494 struct isakmp_gen e;
2495 u_char *dat;
2496 volatile int dlen;
2497  
2498 ND_TCHECK(*ext);
2499 UNALIGNED_MEMCPY(&e, ext, sizeof(e));
2500 ikev2_pay_print(ndo, NPSTR(tpay), e.critical);
2501  
2502 dlen = ntohs(e.len)-4;
2503  
2504 ND_PRINT((ndo," len=%d", dlen));
2505 if (2 < ndo->ndo_vflag && 4 < dlen) {
2506 ND_PRINT((ndo," "));
2507 if (!rawprint(ndo, (caddr_t)(ext + 1), dlen))
2508 goto trunc;
2509 }
2510  
2511 dat = (u_char *)(ext+1);
2512 ND_TCHECK2(*dat, dlen);
2513  
2514 #ifdef HAVE_LIBCRYPTO
2515 /* try to decypt it! */
2516 if(esp_print_decrypt_buffer_by_ikev2(ndo,
2517 base->flags & ISAKMP_FLAG_I,
2518 base->i_ck, base->r_ck,
2519 dat, dat+dlen)) {
2520  
2521 ext = (const struct isakmp_gen *)ndo->ndo_packetp;
2522  
2523 /* got it decrypted, print stuff inside. */
2524 ikev2_sub_print(ndo, base, e.np, ext, ndo->ndo_snapend,
2525 phase, doi, proto, depth+1);
2526 }
2527 #endif
2528  
2529  
2530 /* always return NULL, because E must be at end, and NP refers
2531 * to what was inside.
2532 */
2533 return NULL;
2534 trunc:
2535 ND_PRINT((ndo," [|%s]", NPSTR(tpay)));
2536 return NULL;
2537 }
2538  
2539 static const u_char *
2540 ikev2_cp_print(netdissect_options *ndo, u_char tpay,
2541 const struct isakmp_gen *ext,
2542 u_int item_len _U_, const u_char *ep _U_,
2543 uint32_t phase _U_, uint32_t doi _U_,
2544 uint32_t proto _U_, int depth _U_)
2545 {
2546 return ikev2_gen_print(ndo, tpay, ext);
2547 }
2548  
2549 static const u_char *
2550 ikev2_eap_print(netdissect_options *ndo, u_char tpay,
2551 const struct isakmp_gen *ext,
2552 u_int item_len _U_, const u_char *ep _U_,
2553 uint32_t phase _U_, uint32_t doi _U_,
2554 uint32_t proto _U_, int depth _U_)
2555 {
2556 return ikev2_gen_print(ndo, tpay, ext);
2557 }
2558  
2559 static const u_char *
2560 ike_sub0_print(netdissect_options *ndo,
2561 u_char np, const struct isakmp_gen *ext, const u_char *ep,
2562  
2563 uint32_t phase, uint32_t doi, uint32_t proto, int depth)
2564 {
2565 const u_char *cp;
2566 struct isakmp_gen e;
2567 u_int item_len;
2568  
2569 cp = (u_char *)ext;
2570 ND_TCHECK(*ext);
2571 UNALIGNED_MEMCPY(&e, ext, sizeof(e));
2572  
2573 /*
2574 * Since we can't have a payload length of less than 4 bytes,
2575 * we need to bail out here if the generic header is nonsensical
2576 * or truncated, otherwise we could loop forever processing
2577 * zero-length items or otherwise misdissect the packet.
2578 */
2579 item_len = ntohs(e.len);
2580 if (item_len <= 4)
2581 return NULL;
2582  
2583 if (NPFUNC(np)) {
2584 /*
2585 * XXX - what if item_len is too short, or too long,
2586 * for this payload type?
2587 */
2588 cp = (*npfunc[np])(ndo, np, ext, item_len, ep, phase, doi, proto, depth);
2589 } else {
2590 ND_PRINT((ndo,"%s", NPSTR(np)));
2591 cp += item_len;
2592 }
2593  
2594 return cp;
2595 trunc:
2596 ND_PRINT((ndo," [|isakmp]"));
2597 return NULL;
2598 }
2599  
2600 static const u_char *
2601 ikev1_sub_print(netdissect_options *ndo,
2602 u_char np, const struct isakmp_gen *ext, const u_char *ep,
2603 uint32_t phase, uint32_t doi, uint32_t proto, int depth)
2604 {
2605 const u_char *cp;
2606 int i;
2607 struct isakmp_gen e;
2608  
2609 cp = (const u_char *)ext;
2610  
2611 while (np) {
2612 ND_TCHECK(*ext);
2613  
2614 UNALIGNED_MEMCPY(&e, ext, sizeof(e));
2615  
2616 ND_TCHECK2(*ext, ntohs(e.len));
2617  
2618 depth++;
2619 ND_PRINT((ndo,"\n"));
2620 for (i = 0; i < depth; i++)
2621 ND_PRINT((ndo," "));
2622 ND_PRINT((ndo,"("));
2623 cp = ike_sub0_print(ndo, np, ext, ep, phase, doi, proto, depth);
2624 ND_PRINT((ndo,")"));
2625 depth--;
2626  
2627 if (cp == NULL) {
2628 /* Zero-length subitem */
2629 return NULL;
2630 }
2631  
2632 np = e.np;
2633 ext = (struct isakmp_gen *)cp;
2634 }
2635 return cp;
2636 trunc:
2637 ND_PRINT((ndo," [|%s]", NPSTR(np)));
2638 return NULL;
2639 }
2640  
2641 static char *
2642 numstr(int x)
2643 {
2644 static char buf[20];
2645 snprintf(buf, sizeof(buf), "#%d", x);
2646 return buf;
2647 }
2648  
2649 static void
2650 ikev1_print(netdissect_options *ndo,
2651 const u_char *bp, u_int length,
2652 const u_char *bp2, struct isakmp *base)
2653 {
2654 const struct isakmp *p;
2655 const u_char *ep;
2656 u_char np;
2657 int i;
2658 int phase;
2659  
2660 p = (const struct isakmp *)bp;
2661 ep = ndo->ndo_snapend;
2662  
2663 phase = (EXTRACT_32BITS(base->msgid) == 0) ? 1 : 2;
2664 if (phase == 1)
2665 ND_PRINT((ndo," phase %d", phase));
2666 else
2667 ND_PRINT((ndo," phase %d/others", phase));
2668  
2669 i = cookie_find(&base->i_ck);
2670 if (i < 0) {
2671 if (iszero((u_char *)&base->r_ck, sizeof(base->r_ck))) {
2672 /* the first packet */
2673 ND_PRINT((ndo," I"));
2674 if (bp2)
2675 cookie_record(&base->i_ck, bp2);
2676 } else
2677 ND_PRINT((ndo," ?"));
2678 } else {
2679 if (bp2 && cookie_isinitiator(i, bp2))
2680 ND_PRINT((ndo," I"));
2681 else if (bp2 && cookie_isresponder(i, bp2))
2682 ND_PRINT((ndo," R"));
2683 else
2684 ND_PRINT((ndo," ?"));
2685 }
2686  
2687 ND_PRINT((ndo," %s", ETYPESTR(base->etype)));
2688 if (base->flags) {
2689 ND_PRINT((ndo,"[%s%s]", base->flags & ISAKMP_FLAG_E ? "E" : "",
2690 base->flags & ISAKMP_FLAG_C ? "C" : ""));
2691 }
2692  
2693 if (ndo->ndo_vflag) {
2694 const struct isakmp_gen *ext;
2695  
2696 ND_PRINT((ndo,":"));
2697  
2698 /* regardless of phase... */
2699 if (base->flags & ISAKMP_FLAG_E) {
2700 /*
2701 * encrypted, nothing we can do right now.
2702 * we hope to decrypt the packet in the future...
2703 */
2704 ND_PRINT((ndo," [encrypted %s]", NPSTR(base->np)));
2705 goto done;
2706 }
2707  
2708 CHECKLEN(p + 1, base->np);
2709 np = base->np;
2710 ext = (struct isakmp_gen *)(p + 1);
2711 ikev1_sub_print(ndo, np, ext, ep, phase, 0, 0, 0);
2712 }
2713  
2714 done:
2715 if (ndo->ndo_vflag) {
2716 if (ntohl(base->len) != length) {
2717 ND_PRINT((ndo," (len mismatch: isakmp %u/ip %u)",
2718 (uint32_t)ntohl(base->len), length));
2719 }
2720 }
2721 }
2722  
2723 static const u_char *
2724 ikev2_sub0_print(netdissect_options *ndo, struct isakmp *base,
2725 u_char np, int pcount,
2726 const struct isakmp_gen *ext, const u_char *ep,
2727 uint32_t phase, uint32_t doi, uint32_t proto, int depth)
2728 {
2729 const u_char *cp;
2730 struct isakmp_gen e;
2731 u_int item_len;
2732  
2733 cp = (u_char *)ext;
2734 ND_TCHECK(*ext);
2735 UNALIGNED_MEMCPY(&e, ext, sizeof(e));
2736  
2737 /*
2738 * Since we can't have a payload length of less than 4 bytes,
2739 * we need to bail out here if the generic header is nonsensical
2740 * or truncated, otherwise we could loop forever processing
2741 * zero-length items or otherwise misdissect the packet.
2742 */
2743 item_len = ntohs(e.len);
2744 if (item_len <= 4)
2745 return NULL;
2746  
2747 if(np == ISAKMP_NPTYPE_P) {
2748 cp = ikev2_p_print(ndo, np, pcount, ext, item_len,
2749 ep, phase, doi, proto, depth);
2750 } else if(np == ISAKMP_NPTYPE_T) {
2751 cp = ikev2_t_print(ndo, np, pcount, ext, item_len,
2752 ep, phase, doi, proto, depth);
2753 } else if(np == ISAKMP_NPTYPE_v2E) {
2754 cp = ikev2_e_print(ndo, base, np, ext, item_len,
2755 ep, phase, doi, proto, depth);
2756 } else if (NPFUNC(np)) {
2757 /*
2758 * XXX - what if item_len is too short, or too long,
2759 * for this payload type?
2760 */
2761 cp = (*npfunc[np])(ndo, np, /*pcount,*/ ext, item_len,
2762 ep, phase, doi, proto, depth);
2763 } else {
2764 ND_PRINT((ndo,"%s", NPSTR(np)));
2765 cp += item_len;
2766 }
2767  
2768 return cp;
2769 trunc:
2770 ND_PRINT((ndo," [|isakmp]"));
2771 return NULL;
2772 }
2773  
2774 static const u_char *
2775 ikev2_sub_print(netdissect_options *ndo,
2776 struct isakmp *base,
2777 u_char np, const struct isakmp_gen *ext, const u_char *ep,
2778 uint32_t phase, uint32_t doi, uint32_t proto, int depth)
2779 {
2780 const u_char *cp;
2781 int i;
2782 int pcount;
2783 struct isakmp_gen e;
2784  
2785 cp = (const u_char *)ext;
2786 pcount = 0;
2787 while (np) {
2788 pcount++;
2789 ND_TCHECK(*ext);
2790  
2791 UNALIGNED_MEMCPY(&e, ext, sizeof(e));
2792  
2793 ND_TCHECK2(*ext, ntohs(e.len));
2794  
2795 depth++;
2796 ND_PRINT((ndo,"\n"));
2797 for (i = 0; i < depth; i++)
2798 ND_PRINT((ndo," "));
2799 ND_PRINT((ndo,"("));
2800 cp = ikev2_sub0_print(ndo, base, np, pcount,
2801 ext, ep, phase, doi, proto, depth);
2802 ND_PRINT((ndo,")"));
2803 depth--;
2804  
2805 if (cp == NULL) {
2806 /* Zero-length subitem */
2807 return NULL;
2808 }
2809  
2810 np = e.np;
2811 ext = (struct isakmp_gen *)cp;
2812 }
2813 return cp;
2814 trunc:
2815 ND_PRINT((ndo," [|%s]", NPSTR(np)));
2816 return NULL;
2817 }
2818  
2819 static void
2820 ikev2_print(netdissect_options *ndo,
2821 const u_char *bp, u_int length,
2822 const u_char *bp2 _U_, struct isakmp *base)
2823 {
2824 const struct isakmp *p;
2825 const u_char *ep;
2826 u_char np;
2827 int phase;
2828  
2829 p = (const struct isakmp *)bp;
2830 ep = ndo->ndo_snapend;
2831  
2832 phase = (EXTRACT_32BITS(base->msgid) == 0) ? 1 : 2;
2833 if (phase == 1)
2834 ND_PRINT((ndo, " parent_sa"));
2835 else
2836 ND_PRINT((ndo, " child_sa "));
2837  
2838 ND_PRINT((ndo, " %s", ETYPESTR(base->etype)));
2839 if (base->flags) {
2840 ND_PRINT((ndo, "[%s%s%s]",
2841 base->flags & ISAKMP_FLAG_I ? "I" : "",
2842 base->flags & ISAKMP_FLAG_V ? "V" : "",
2843 base->flags & ISAKMP_FLAG_R ? "R" : ""));
2844 }
2845  
2846 if (ndo->ndo_vflag) {
2847 const struct isakmp_gen *ext;
2848  
2849 ND_PRINT((ndo, ":"));
2850  
2851 /* regardless of phase... */
2852 if (base->flags & ISAKMP_FLAG_E) {
2853 /*
2854 * encrypted, nothing we can do right now.
2855 * we hope to decrypt the packet in the future...
2856 */
2857 ND_PRINT((ndo, " [encrypted %s]", NPSTR(base->np)));
2858 goto done;
2859 }
2860  
2861 CHECKLEN(p + 1, base->np)
2862  
2863 np = base->np;
2864 ext = (struct isakmp_gen *)(p + 1);
2865 ikev2_sub_print(ndo, base, np, ext, ep, phase, 0, 0, 0);
2866 }
2867  
2868 done:
2869 if (ndo->ndo_vflag) {
2870 if (ntohl(base->len) != length) {
2871 ND_PRINT((ndo, " (len mismatch: isakmp %u/ip %u)",
2872 (uint32_t)ntohl(base->len), length));
2873 }
2874 }
2875 }
2876  
2877 void
2878 isakmp_print(netdissect_options *ndo,
2879 const u_char *bp, u_int length,
2880 const u_char *bp2)
2881 {
2882 const struct isakmp *p;
2883 struct isakmp base;
2884 const u_char *ep;
2885 int major, minor;
2886  
2887 #ifdef HAVE_LIBCRYPTO
2888 /* initialize SAs */
2889 if (ndo->ndo_sa_list_head == NULL) {
2890 if (ndo->ndo_espsecret)
2891 esp_print_decodesecret(ndo);
2892 }
2893 #endif
2894  
2895 p = (const struct isakmp *)bp;
2896 ep = ndo->ndo_snapend;
2897  
2898 if ((struct isakmp *)ep < p + 1) {
2899 ND_PRINT((ndo,"[|isakmp]"));
2900 return;
2901 }
2902  
2903 UNALIGNED_MEMCPY(&base, p, sizeof(base));
2904  
2905 ND_PRINT((ndo,"isakmp"));
2906 major = (base.vers & ISAKMP_VERS_MAJOR)
2907 >> ISAKMP_VERS_MAJOR_SHIFT;
2908 minor = (base.vers & ISAKMP_VERS_MINOR)
2909 >> ISAKMP_VERS_MINOR_SHIFT;
2910  
2911 if (ndo->ndo_vflag) {
2912 ND_PRINT((ndo," %d.%d", major, minor));
2913 }
2914  
2915 if (ndo->ndo_vflag) {
2916 ND_PRINT((ndo," msgid "));
2917 hexprint(ndo, (caddr_t)&base.msgid, sizeof(base.msgid));
2918 }
2919  
2920 if (1 < ndo->ndo_vflag) {
2921 ND_PRINT((ndo," cookie "));
2922 hexprint(ndo, (caddr_t)&base.i_ck, sizeof(base.i_ck));
2923 ND_PRINT((ndo,"->"));
2924 hexprint(ndo, (caddr_t)&base.r_ck, sizeof(base.r_ck));
2925 }
2926 ND_PRINT((ndo,":"));
2927  
2928 switch(major) {
2929 case IKEv1_MAJOR_VERSION:
2930 ikev1_print(ndo, bp, length, bp2, &base);
2931 break;
2932  
2933 case IKEv2_MAJOR_VERSION:
2934 ikev2_print(ndo, bp, length, bp2, &base);
2935 break;
2936 }
2937 }
2938  
2939 void
2940 isakmp_rfc3948_print(netdissect_options *ndo,
2941 const u_char *bp, u_int length,
2942 const u_char *bp2)
2943 {
2944  
2945 if(length == 1 && bp[0]==0xff) {
2946 ND_PRINT((ndo, "isakmp-nat-keep-alive"));
2947 return;
2948 }
2949  
2950 if(length < 4) {
2951 goto trunc;
2952 }
2953  
2954 /*
2955 * see if this is an IKE packet
2956 */
2957 if(bp[0]==0 && bp[1]==0 && bp[2]==0 && bp[3]==0) {
2958 ND_PRINT((ndo, "NONESP-encap: "));
2959 isakmp_print(ndo, bp+4, length-4, bp2);
2960 return;
2961 }
2962  
2963 /* must be an ESP packet */
2964 {
2965 int nh, enh, padlen;
2966 int advance;
2967  
2968 ND_PRINT((ndo, "UDP-encap: "));
2969  
2970 advance = esp_print(ndo, bp, length, bp2, &enh, &padlen);
2971 if(advance <= 0)
2972 return;
2973  
2974 bp += advance;
2975 length -= advance + padlen;
2976 nh = enh & 0xff;
2977  
2978 ip_print_inner(ndo, bp, length, nh, bp2);
2979 return;
2980 }
2981  
2982 trunc:
2983 ND_PRINT((ndo,"[|isakmp]"));
2984 return;
2985 }
2986  
2987 /*
2988 * Local Variables:
2989 * c-style: whitesmith
2990 * c-basic-offset: 8
2991 * End:
2992 */
2993  
2994  
2995  
2996