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1 /*
2  * Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997
3  *      The Regents of the University of California.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that: (1) source code distributions
7  * retain the above copyright notice and this paragraph in its entirety, (2)
8  * distributions including binary code include the above copyright notice and
9  * this paragraph in its entirety in the documentation or other materials
10  * provided with the distribution, and (3) all advertising materials mentioning
11  * features or use of this software display the following acknowledgement:
12  * ``This product includes software developed by the University of California,
13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14  * the University nor the names of its contributors may be used to endorse
15  * or promote products derived from this software without specific prior
16  * written permission.
17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20  *
21  * PPTP support contributed by Motonori Shindo (mshindo@mshindo.net)
22  */
23 
24 
25 #ifndef lint
26 static const char rcsid[] _U_ =
27      "@(#) $Header: /tcpdump/master/tcpdump/print-pptp.c,v 1.11.2.1 2006/06/23 02:07:27 hannes Exp $";
28 #endif
29 
30 #ifdef HAVE_CONFIG_H
31 #include "config.h"
32 #endif
33 
34 #include <tcpdump-stdinc.h>
35 
36 #include <stdio.h>
37 
38 #include "interface.h"
39 #include "extract.h"
40 
41 static char tstr[] = " [|pptp]";
42 
43 #define PPTP_MSG_TYPE_CTRL	1	/* Control Message */
44 #define PPTP_MSG_TYPE_MGMT	2	/* Management Message (currently not used */
45 #define PPTP_MAGIC_COOKIE	0x1a2b3c4d	/* for sanity check */
46 
47 #define PPTP_CTRL_MSG_TYPE_SCCRQ	1
48 #define PPTP_CTRL_MSG_TYPE_SCCRP	2
49 #define PPTP_CTRL_MSG_TYPE_StopCCRQ	3
50 #define PPTP_CTRL_MSG_TYPE_StopCCRP	4
51 #define PPTP_CTRL_MSG_TYPE_ECHORQ	5
52 #define PPTP_CTRL_MSG_TYPE_ECHORP	6
53 #define PPTP_CTRL_MSG_TYPE_OCRQ		7
54 #define PPTP_CTRL_MSG_TYPE_OCRP		8
55 #define PPTP_CTRL_MSG_TYPE_ICRQ		9
56 #define PPTP_CTRL_MSG_TYPE_ICRP		10
57 #define PPTP_CTRL_MSG_TYPE_ICCN		11
58 #define PPTP_CTRL_MSG_TYPE_CCRQ		12
59 #define PPTP_CTRL_MSG_TYPE_CDN		13
60 #define PPTP_CTRL_MSG_TYPE_WEN		14
61 #define PPTP_CTRL_MSG_TYPE_SLI		15
62 
63 #define PPTP_FRAMING_CAP_ASYNC_MASK	0x00000001      /* Aynchronous */
64 #define PPTP_FRAMING_CAP_SYNC_MASK	0x00000002      /* Synchronous */
65 
66 #define PPTP_BEARER_CAP_ANALOG_MASK	0x00000001      /* Analog */
67 #define PPTP_BEARER_CAP_DIGITAL_MASK	0x00000002      /* Digital */
68 
69 static const char *pptp_message_type_string[] = {
70 	"NOT_DEFINED",		/* 0  Not defined in the RFC2637 */
71 	"SCCRQ",		/* 1  Start-Control-Connection-Request */
72 	"SCCRP",		/* 2  Start-Control-Connection-Reply */
73 	"StopCCRQ",		/* 3  Stop-Control-Connection-Request */
74 	"StopCCRP",		/* 4  Stop-Control-Connection-Reply */
75 	"ECHORQ",		/* 5  Echo Request */
76 	"ECHORP",		/* 6  Echo Reply */
77 
78 	"OCRQ",			/* 7  Outgoing-Call-Request */
79 	"OCRP",			/* 8  Outgoing-Call-Reply */
80 	"ICRQ",			/* 9  Incoming-Call-Request */
81 	"ICRP",			/* 10 Incoming-Call-Reply */
82 	"ICCN",			/* 11 Incoming-Call-Connected */
83 	"CCRQ",			/* 12 Call-Clear-Request */
84 	"CDN",			/* 13 Call-Disconnect-Notify */
85 
86 	"WEN",			/* 14 WAN-Error-Notify */
87 
88 	"SLI"			/* 15 Set-Link-Info */
89 #define PPTP_MAX_MSGTYPE_INDEX	16
90 };
91 
92 /* common for all PPTP control messages */
93 struct pptp_hdr {
94 	u_int16_t length;
95 	u_int16_t msg_type;
96 	u_int32_t magic_cookie;
97 	u_int16_t ctrl_msg_type;
98 	u_int16_t reserved0;
99 };
100 
101 struct pptp_msg_sccrq {
102 	u_int16_t proto_ver;
103 	u_int16_t reserved1;
104 	u_int32_t framing_cap;
105 	u_int32_t bearer_cap;
106 	u_int16_t max_channel;
107 	u_int16_t firm_rev;
108 	u_char hostname[64];
109 	u_char vendor[64];
110 };
111 
112 struct pptp_msg_sccrp {
113 	u_int16_t proto_ver;
114 	u_int8_t result_code;
115 	u_int8_t err_code;
116 	u_int32_t framing_cap;
117 	u_int32_t bearer_cap;
118 	u_int16_t max_channel;
119 	u_int16_t firm_rev;
120 	u_char hostname[64];
121 	u_char vendor[64];
122 };
123 
124 struct pptp_msg_stopccrq {
125 	u_int8_t reason;
126 	u_int8_t reserved1;
127 	u_int16_t reserved2;
128 };
129 
130 struct pptp_msg_stopccrp {
131 	u_int8_t result_code;
132 	u_int8_t err_code;
133 	u_int16_t reserved1;
134 };
135 
136 struct pptp_msg_echorq {
137 	u_int32_t id;
138 };
139 
140 struct pptp_msg_echorp {
141 	u_int32_t id;
142 	u_int8_t result_code;
143 	u_int8_t err_code;
144 	u_int16_t reserved1;
145 };
146 
147 struct pptp_msg_ocrq {
148 	u_int16_t call_id;
149 	u_int16_t call_ser;
150 	u_int32_t min_bps;
151 	u_int32_t max_bps;
152 	u_int32_t bearer_type;
153 	u_int32_t framing_type;
154 	u_int16_t recv_winsiz;
155 	u_int16_t pkt_proc_delay;
156 	u_int16_t phone_no_len;
157 	u_int16_t reserved1;
158 	u_char phone_no[64];
159 	u_char subaddr[64];
160 };
161 
162 struct pptp_msg_ocrp {
163 	u_int16_t call_id;
164 	u_int16_t peer_call_id;
165 	u_int8_t result_code;
166 	u_int8_t err_code;
167 	u_int16_t cause_code;
168 	u_int32_t conn_speed;
169 	u_int16_t recv_winsiz;
170 	u_int16_t pkt_proc_delay;
171 	u_int32_t phy_chan_id;
172 };
173 
174 struct pptp_msg_icrq {
175 	u_int16_t call_id;
176 	u_int16_t call_ser;
177 	u_int32_t bearer_type;
178 	u_int32_t phy_chan_id;
179 	u_int16_t dialed_no_len;
180 	u_int16_t dialing_no_len;
181 	u_char dialed_no[64];		/* DNIS */
182 	u_char dialing_no[64];		/* CLID */
183 	u_char subaddr[64];
184 };
185 
186 struct pptp_msg_icrp {
187 	u_int16_t call_id;
188 	u_int16_t peer_call_id;
189 	u_int8_t result_code;
190 	u_int8_t err_code;
191 	u_int16_t recv_winsiz;
192 	u_int16_t pkt_proc_delay;
193 	u_int16_t reserved1;
194 };
195 
196 struct pptp_msg_iccn {
197 	u_int16_t peer_call_id;
198 	u_int16_t reserved1;
199 	u_int32_t conn_speed;
200 	u_int16_t recv_winsiz;
201 	u_int16_t pkt_proc_delay;
202 	u_int32_t framing_type;
203 };
204 
205 struct pptp_msg_ccrq {
206 	u_int16_t call_id;
207 	u_int16_t reserved1;
208 };
209 
210 struct pptp_msg_cdn {
211 	u_int16_t call_id;
212 	u_int8_t result_code;
213 	u_int8_t err_code;
214 	u_int16_t cause_code;
215 	u_int16_t reserved1;
216 	u_char call_stats[128];
217 };
218 
219 struct pptp_msg_wen {
220 	u_int16_t peer_call_id;
221 	u_int16_t reserved1;
222 	u_int32_t crc_err;
223 	u_int32_t framing_err;
224 	u_int32_t hardware_overrun;
225 	u_int32_t buffer_overrun;
226 	u_int32_t timeout_err;
227 	u_int32_t align_err;
228 };
229 
230 struct pptp_msg_sli {
231 	u_int16_t peer_call_id;
232 	u_int16_t reserved1;
233 	u_int32_t send_accm;
234 	u_int32_t recv_accm;
235 };
236 
237 /* attributes that appear more than once in above messages:
238 
239    Number of
240    occurence    attributes
241   --------------------------------------
242       2         u_int32_t bearer_cap;
243       2         u_int32_t bearer_type;
244       6         u_int16_t call_id;
245       2         u_int16_t call_ser;
246       2         u_int16_t cause_code;
247       2         u_int32_t conn_speed;
248       6         u_int8_t err_code;
249       2         u_int16_t firm_rev;
250       2         u_int32_t framing_cap;
251       2         u_int32_t framing_type;
252       2         u_char hostname[64];
253       2         u_int32_t id;
254       2         u_int16_t max_channel;
255       5         u_int16_t peer_call_id;
256       2         u_int32_t phy_chan_id;
257       4         u_int16_t pkt_proc_delay;
258       2         u_int16_t proto_ver;
259       4         u_int16_t recv_winsiz;
260       2         u_int8_t reserved1;
261       9         u_int16_t reserved1;
262       6         u_int8_t result_code;
263       2         u_char subaddr[64];
264       2         u_char vendor[64];
265 
266   so I will prepare print out functions for these attributes (except for
267   reserved*).
268 */
269 
270 /******************************************/
271 /* Attribute-specific print out functions */
272 /******************************************/
273 
274 /* In these attribute-specific print-out functions, it't not necessary
275    to do TCHECK because they are already checked in the caller of
276    these functions. */
277 
278 static void
pptp_bearer_cap_print(const u_int32_t * bearer_cap)279 pptp_bearer_cap_print(const u_int32_t *bearer_cap)
280 {
281 	printf(" BEARER_CAP(");
282 	if (EXTRACT_32BITS(bearer_cap) & PPTP_BEARER_CAP_DIGITAL_MASK) {
283                 printf("D");
284         }
285         if (EXTRACT_32BITS(bearer_cap) & PPTP_BEARER_CAP_ANALOG_MASK) {
286                 printf("A");
287         }
288 	printf(")");
289 }
290 
291 static void
pptp_bearer_type_print(const u_int32_t * bearer_type)292 pptp_bearer_type_print(const u_int32_t *bearer_type)
293 {
294 	printf(" BEARER_TYPE(");
295 	switch (EXTRACT_32BITS(bearer_type)) {
296 	case 1:
297 		printf("A");	/* Analog */
298 		break;
299 	case 2:
300 		printf("D");	/* Digital */
301 		break;
302 	case 3:
303 		printf("Any");
304 		break;
305 	default:
306 		printf("?");
307 		break;
308         }
309 	printf(")");
310 }
311 
312 static void
pptp_call_id_print(const u_int16_t * call_id)313 pptp_call_id_print(const u_int16_t *call_id)
314 {
315 	printf(" CALL_ID(%u)", EXTRACT_16BITS(call_id));
316 }
317 
318 static void
pptp_call_ser_print(const u_int16_t * call_ser)319 pptp_call_ser_print(const u_int16_t *call_ser)
320 {
321 	printf(" CALL_SER_NUM(%u)", EXTRACT_16BITS(call_ser));
322 }
323 
324 static void
pptp_cause_code_print(const u_int16_t * cause_code)325 pptp_cause_code_print(const u_int16_t *cause_code)
326 {
327 	printf(" CAUSE_CODE(%u)", EXTRACT_16BITS(cause_code));
328 }
329 
330 static void
pptp_conn_speed_print(const u_int32_t * conn_speed)331 pptp_conn_speed_print(const u_int32_t *conn_speed)
332 {
333 	printf(" CONN_SPEED(%u)", EXTRACT_32BITS(conn_speed));
334 }
335 
336 static void
pptp_err_code_print(const u_int8_t * err_code)337 pptp_err_code_print(const u_int8_t *err_code)
338 {
339 	printf(" ERR_CODE(%u", *err_code);
340 	if (vflag) {
341 		switch (*err_code) {
342 		case 0:
343 			printf(":None");
344 			break;
345 		case 1:
346 			printf(":Not-Connected");
347 			break;
348 		case 2:
349 			printf(":Bad-Format");
350 			break;
351 		case 3:
352 			printf(":Bad-Valude");
353 			break;
354 		case 4:
355 			printf(":No-Resource");
356 			break;
357 		case 5:
358 			printf(":Bad-Call-ID");
359 			break;
360 		case 6:
361 			printf(":PAC-Error");
362 			break;
363 		default:
364 			printf(":?");
365 			break;
366 		}
367 	}
368 	printf(")");
369 }
370 
371 static void
pptp_firm_rev_print(const u_int16_t * firm_rev)372 pptp_firm_rev_print(const u_int16_t *firm_rev)
373 {
374 	printf(" FIRM_REV(%u)", EXTRACT_16BITS(firm_rev));
375 }
376 
377 static void
pptp_framing_cap_print(const u_int32_t * framing_cap)378 pptp_framing_cap_print(const u_int32_t *framing_cap)
379 {
380 	printf(" FRAME_CAP(");
381 	if (EXTRACT_32BITS(framing_cap) & PPTP_FRAMING_CAP_ASYNC_MASK) {
382                 printf("A");		/* Async */
383         }
384         if (EXTRACT_32BITS(framing_cap) & PPTP_FRAMING_CAP_SYNC_MASK) {
385                 printf("S");		/* Sync */
386         }
387 	printf(")");
388 }
389 
390 static void
pptp_framing_type_print(const u_int32_t * framing_type)391 pptp_framing_type_print(const u_int32_t *framing_type)
392 {
393 	printf(" FRAME_TYPE(");
394 	switch (EXTRACT_32BITS(framing_type)) {
395 	case 1:
396 		printf("A");		/* Async */
397 		break;
398 	case 2:
399 		printf("S");		/* Sync */
400 		break;
401 	case 3:
402 		printf("E");		/* Either */
403 		break;
404 	default:
405 		printf("?");
406 		break;
407 	}
408 	printf(")");
409 }
410 
411 static void
pptp_hostname_print(const u_char * hostname)412 pptp_hostname_print(const u_char *hostname)
413 {
414 	printf(" HOSTNAME(%.64s)", hostname);
415 }
416 
417 static void
pptp_id_print(const u_int32_t * id)418 pptp_id_print(const u_int32_t *id)
419 {
420 	printf(" ID(%u)", EXTRACT_32BITS(id));
421 }
422 
423 static void
pptp_max_channel_print(const u_int16_t * max_channel)424 pptp_max_channel_print(const u_int16_t *max_channel)
425 {
426 	printf(" MAX_CHAN(%u)", EXTRACT_16BITS(max_channel));
427 }
428 
429 static void
pptp_peer_call_id_print(const u_int16_t * peer_call_id)430 pptp_peer_call_id_print(const u_int16_t *peer_call_id)
431 {
432 	printf(" PEER_CALL_ID(%u)", EXTRACT_16BITS(peer_call_id));
433 }
434 
435 static void
pptp_phy_chan_id_print(const u_int32_t * phy_chan_id)436 pptp_phy_chan_id_print(const u_int32_t *phy_chan_id)
437 {
438 	printf(" PHY_CHAN_ID(%u)", EXTRACT_32BITS(phy_chan_id));
439 }
440 
441 static void
pptp_pkt_proc_delay_print(const u_int16_t * pkt_proc_delay)442 pptp_pkt_proc_delay_print(const u_int16_t *pkt_proc_delay)
443 {
444 	printf(" PROC_DELAY(%u)", EXTRACT_16BITS(pkt_proc_delay));
445 }
446 
447 static void
pptp_proto_ver_print(const u_int16_t * proto_ver)448 pptp_proto_ver_print(const u_int16_t *proto_ver)
449 {
450 	printf(" PROTO_VER(%u.%u)",	/* Version.Revision */
451 	       EXTRACT_16BITS(proto_ver) >> 8,
452 	       EXTRACT_16BITS(proto_ver) & 0xff);
453 }
454 
455 static void
pptp_recv_winsiz_print(const u_int16_t * recv_winsiz)456 pptp_recv_winsiz_print(const u_int16_t *recv_winsiz)
457 {
458 	printf(" RECV_WIN(%u)", EXTRACT_16BITS(recv_winsiz));
459 }
460 
461 static void
pptp_result_code_print(const u_int8_t * result_code,int ctrl_msg_type)462 pptp_result_code_print(const u_int8_t *result_code, int ctrl_msg_type)
463 {
464 	printf(" RESULT_CODE(%u", *result_code);
465 	if (vflag) {
466 		switch (ctrl_msg_type) {
467 		case PPTP_CTRL_MSG_TYPE_SCCRP:
468 			switch (*result_code) {
469 			case 1:
470 				printf(":Successful channel establishment");
471 				break;
472 			case 2:
473 				printf(":General error");
474 				break;
475 			case 3:
476 				printf(":Command channel already exists");
477 				break;
478 			case 4:
479 				printf(":Requester is not authorized to establish a command channel");
480 				break;
481 			case 5:
482 				printf(":The protocol version of the requester is not supported");
483 				break;
484 			default:
485 				printf(":?");
486 				break;
487 			}
488 			break;
489 		case PPTP_CTRL_MSG_TYPE_StopCCRP:
490 		case PPTP_CTRL_MSG_TYPE_ECHORP:
491 			switch (*result_code) {
492 			case 1:
493 				printf(":OK");
494 				break;
495 			case 2:
496 				printf(":General Error");
497 				break;
498 			default:
499 				printf(":?");
500 				break;
501 			}
502 			break;
503 		case PPTP_CTRL_MSG_TYPE_OCRP:
504 			switch (*result_code) {
505 			case 1:
506 				printf(":Connected");
507 				break;
508 			case 2:
509 				printf(":General Error");
510 				break;
511 			case 3:
512 				printf(":No Carrier");
513 				break;
514 			case 4:
515 				printf(":Busy");
516 				break;
517 			case 5:
518 				printf(":No Dial Tone");
519 				break;
520 			case 6:
521 				printf(":Time-out");
522 				break;
523 			case 7:
524 				printf(":Do Not Accept");
525 				break;
526 			default:
527 				printf(":?");
528 				break;
529 			}
530 			break;
531 		case PPTP_CTRL_MSG_TYPE_ICRP:
532 			switch (*result_code) {
533 			case 1:
534 				printf(":Connect");
535 				break;
536 			case 2:
537 				printf(":General Error");
538 				break;
539 			case 3:
540 				printf(":Do Not Accept");
541 				break;
542 			default:
543 				printf(":?");
544 				break;
545 			}
546 			break;
547 		case PPTP_CTRL_MSG_TYPE_CDN:
548 			switch (*result_code) {
549 			case 1:
550 				printf(":Lost Carrier");
551 				break;
552 			case 2:
553 				printf(":General Error");
554 				break;
555 			case 3:
556 				printf(":Admin Shutdown");
557 				break;
558 			case 4:
559 				printf(":Request");
560 			default:
561 				printf(":?");
562 				break;
563 			break;
564 			}
565 		default:
566 			/* assertion error */
567 			break;
568 		}
569 	}
570 	printf(")");
571 }
572 
573 static void
pptp_subaddr_print(const u_char * subaddr)574 pptp_subaddr_print(const u_char *subaddr)
575 {
576 	printf(" SUB_ADDR(%.64s)", subaddr);
577 }
578 
579 static void
pptp_vendor_print(const u_char * vendor)580 pptp_vendor_print(const u_char *vendor)
581 {
582 	printf(" VENDOR(%.64s)", vendor);
583 }
584 
585 /************************************/
586 /* PPTP message print out functions */
587 /************************************/
588 static void
pptp_sccrq_print(const u_char * dat)589 pptp_sccrq_print(const u_char *dat)
590 {
591 	struct pptp_msg_sccrq *ptr = (struct pptp_msg_sccrq *)dat;
592 
593 	TCHECK(ptr->proto_ver);
594 	pptp_proto_ver_print(&ptr->proto_ver);
595 	TCHECK(ptr->reserved1);
596 	TCHECK(ptr->framing_cap);
597 	pptp_framing_cap_print(&ptr->framing_cap);
598 	TCHECK(ptr->bearer_cap);
599 	pptp_bearer_cap_print(&ptr->bearer_cap);
600 	TCHECK(ptr->max_channel);
601 	pptp_max_channel_print(&ptr->max_channel);
602 	TCHECK(ptr->firm_rev);
603 	pptp_firm_rev_print(&ptr->firm_rev);
604 	TCHECK(ptr->hostname);
605 	pptp_hostname_print(&ptr->hostname[0]);
606 	TCHECK(ptr->vendor);
607 	pptp_vendor_print(&ptr->vendor[0]);
608 
609 	return;
610 
611 trunc:
612 	printf("%s", tstr);
613 }
614 
615 static void
pptp_sccrp_print(const u_char * dat)616 pptp_sccrp_print(const u_char *dat)
617 {
618 	struct pptp_msg_sccrp *ptr = (struct pptp_msg_sccrp *)dat;
619 
620 	TCHECK(ptr->proto_ver);
621 	pptp_proto_ver_print(&ptr->proto_ver);
622 	TCHECK(ptr->result_code);
623 	pptp_result_code_print(&ptr->result_code, PPTP_CTRL_MSG_TYPE_SCCRP);
624 	TCHECK(ptr->err_code);
625 	pptp_err_code_print(&ptr->err_code);
626 	TCHECK(ptr->framing_cap);
627 	pptp_framing_cap_print(&ptr->framing_cap);
628 	TCHECK(ptr->bearer_cap);
629 	pptp_bearer_cap_print(&ptr->bearer_cap);
630 	TCHECK(ptr->max_channel);
631 	pptp_max_channel_print(&ptr->max_channel);
632 	TCHECK(ptr->firm_rev);
633 	pptp_firm_rev_print(&ptr->firm_rev);
634 	TCHECK(ptr->hostname);
635 	pptp_hostname_print(&ptr->hostname[0]);
636 	TCHECK(ptr->vendor);
637 	pptp_vendor_print(&ptr->vendor[0]);
638 
639 	return;
640 
641 trunc:
642 	printf("%s", tstr);
643 }
644 
645 static void
pptp_stopccrq_print(const u_char * dat)646 pptp_stopccrq_print(const u_char *dat)
647 {
648 	struct pptp_msg_stopccrq *ptr = (struct pptp_msg_stopccrq *)dat;
649 
650 	TCHECK(ptr->reason);
651 	printf(" REASON(%u", ptr->reason);
652 	if (vflag) {
653 		switch (ptr->reason) {
654 		case 1:
655 			printf(":None");
656 			break;
657 		case 2:
658 			printf(":Stop-Protocol");
659 			break;
660 		case 3:
661 			printf(":Stop-Local-Shutdown");
662 			break;
663 		default:
664 			printf(":?");
665 			break;
666 		}
667 	}
668 	printf(")");
669 	TCHECK(ptr->reserved1);
670 	TCHECK(ptr->reserved2);
671 
672 	return;
673 
674 trunc:
675 	printf("%s", tstr);
676 }
677 
678 static void
pptp_stopccrp_print(const u_char * dat)679 pptp_stopccrp_print(const u_char *dat)
680 {
681 	struct pptp_msg_stopccrp *ptr = (struct pptp_msg_stopccrp *)dat;
682 
683 	TCHECK(ptr->result_code);
684 	pptp_result_code_print(&ptr->result_code, PPTP_CTRL_MSG_TYPE_StopCCRP);
685 	TCHECK(ptr->err_code);
686 	pptp_err_code_print(&ptr->err_code);
687 	TCHECK(ptr->reserved1);
688 
689 	return;
690 
691 trunc:
692 	printf("%s", tstr);
693 }
694 
695 static void
pptp_echorq_print(const u_char * dat)696 pptp_echorq_print(const u_char *dat)
697 {
698 	struct pptp_msg_echorq *ptr = (struct pptp_msg_echorq *)dat;
699 
700 	TCHECK(ptr->id);
701 	pptp_id_print(&ptr->id);
702 
703 	return;
704 
705 trunc:
706 	printf("%s", tstr);
707 }
708 
709 static void
pptp_echorp_print(const u_char * dat)710 pptp_echorp_print(const u_char *dat)
711 {
712 	struct pptp_msg_echorp *ptr = (struct pptp_msg_echorp *)dat;
713 
714 	TCHECK(ptr->id);
715 	pptp_id_print(&ptr->id);
716 	TCHECK(ptr->result_code);
717 	pptp_result_code_print(&ptr->result_code, PPTP_CTRL_MSG_TYPE_ECHORP);
718 	TCHECK(ptr->err_code);
719 	pptp_err_code_print(&ptr->err_code);
720 	TCHECK(ptr->reserved1);
721 
722 	return;
723 
724 trunc:
725 	printf("%s", tstr);
726 }
727 
728 static void
pptp_ocrq_print(const u_char * dat)729 pptp_ocrq_print(const u_char *dat)
730 {
731 	struct pptp_msg_ocrq *ptr = (struct pptp_msg_ocrq *)dat;
732 
733 	TCHECK(ptr->call_id);
734 	pptp_call_id_print(&ptr->call_id);
735 	TCHECK(ptr->call_ser);
736 	pptp_call_ser_print(&ptr->call_ser);
737 	TCHECK(ptr->min_bps);
738 	printf(" MIN_BPS(%u)", EXTRACT_32BITS(&ptr->min_bps));
739 	TCHECK(ptr->max_bps);
740 	printf(" MAX_BPS(%u)", EXTRACT_32BITS(&ptr->max_bps));
741 	TCHECK(ptr->bearer_type);
742 	pptp_bearer_type_print(&ptr->bearer_type);
743 	TCHECK(ptr->framing_type);
744 	pptp_framing_type_print(&ptr->framing_type);
745 	TCHECK(ptr->recv_winsiz);
746 	pptp_recv_winsiz_print(&ptr->recv_winsiz);
747 	TCHECK(ptr->pkt_proc_delay);
748 	pptp_pkt_proc_delay_print(&ptr->pkt_proc_delay);
749 	TCHECK(ptr->phone_no_len);
750 	printf(" PHONE_NO_LEN(%u)", EXTRACT_16BITS(&ptr->phone_no_len));
751 	TCHECK(ptr->reserved1);
752 	TCHECK(ptr->phone_no);
753 	printf(" PHONE_NO(%.64s)", ptr->phone_no);
754 	TCHECK(ptr->subaddr);
755 	pptp_subaddr_print(&ptr->subaddr[0]);
756 
757 	return;
758 
759 trunc:
760 	printf("%s", tstr);
761 }
762 
763 static void
pptp_ocrp_print(const u_char * dat)764 pptp_ocrp_print(const u_char *dat)
765 {
766 	struct pptp_msg_ocrp *ptr = (struct pptp_msg_ocrp *)dat;
767 
768 	TCHECK(ptr->call_id);
769 	pptp_call_id_print(&ptr->call_id);
770 	TCHECK(ptr->peer_call_id);
771 	pptp_peer_call_id_print(&ptr->peer_call_id);
772 	TCHECK(ptr->result_code);
773 	pptp_result_code_print(&ptr->result_code, PPTP_CTRL_MSG_TYPE_OCRP);
774 	TCHECK(ptr->err_code);
775 	pptp_err_code_print(&ptr->err_code);
776 	TCHECK(ptr->cause_code);
777 	pptp_cause_code_print(&ptr->cause_code);
778 	TCHECK(ptr->conn_speed);
779 	pptp_conn_speed_print(&ptr->conn_speed);
780 	TCHECK(ptr->recv_winsiz);
781 	pptp_recv_winsiz_print(&ptr->recv_winsiz);
782 	TCHECK(ptr->pkt_proc_delay);
783 	pptp_pkt_proc_delay_print(&ptr->pkt_proc_delay);
784 	TCHECK(ptr->phy_chan_id);
785 	pptp_phy_chan_id_print(&ptr->phy_chan_id);
786 
787 	return;
788 
789 trunc:
790 	printf("%s", tstr);
791 }
792 
793 static void
pptp_icrq_print(const u_char * dat)794 pptp_icrq_print(const u_char *dat)
795 {
796 	struct pptp_msg_icrq *ptr = (struct pptp_msg_icrq *)dat;
797 
798 	TCHECK(ptr->call_id);
799 	pptp_call_id_print(&ptr->call_id);
800 	TCHECK(ptr->call_ser);
801 	pptp_call_ser_print(&ptr->call_ser);
802 	TCHECK(ptr->bearer_type);
803 	pptp_bearer_type_print(&ptr->bearer_type);
804 	TCHECK(ptr->phy_chan_id);
805 	pptp_phy_chan_id_print(&ptr->phy_chan_id);
806 	TCHECK(ptr->dialed_no_len);
807 	printf(" DIALED_NO_LEN(%u)", EXTRACT_16BITS(&ptr->dialed_no_len));
808 	TCHECK(ptr->dialing_no_len);
809 	printf(" DIALING_NO_LEN(%u)", EXTRACT_16BITS(&ptr->dialing_no_len));
810 	TCHECK(ptr->dialed_no);
811 	printf(" DIALED_NO(%.64s)", ptr->dialed_no);
812 	TCHECK(ptr->dialing_no);
813 	printf(" DIALING_NO(%.64s)", ptr->dialing_no);
814 	TCHECK(ptr->subaddr);
815 	pptp_subaddr_print(&ptr->subaddr[0]);
816 
817 	return;
818 
819 trunc:
820 	printf("%s", tstr);
821 }
822 
823 static void
pptp_icrp_print(const u_char * dat)824 pptp_icrp_print(const u_char *dat)
825 {
826 	struct pptp_msg_icrp *ptr = (struct pptp_msg_icrp *)dat;
827 
828 	TCHECK(ptr->call_id);
829 	pptp_call_id_print(&ptr->call_id);
830 	TCHECK(ptr->peer_call_id);
831 	pptp_peer_call_id_print(&ptr->peer_call_id);
832 	TCHECK(ptr->result_code);
833 	pptp_result_code_print(&ptr->result_code, PPTP_CTRL_MSG_TYPE_ICRP);
834 	TCHECK(ptr->err_code);
835 	pptp_err_code_print(&ptr->err_code);
836 	TCHECK(ptr->recv_winsiz);
837 	pptp_recv_winsiz_print(&ptr->recv_winsiz);
838 	TCHECK(ptr->pkt_proc_delay);
839 	pptp_pkt_proc_delay_print(&ptr->pkt_proc_delay);
840 	TCHECK(ptr->reserved1);
841 
842 	return;
843 
844 trunc:
845 	printf("%s", tstr);
846 }
847 
848 static void
pptp_iccn_print(const u_char * dat)849 pptp_iccn_print(const u_char *dat)
850 {
851 	struct pptp_msg_iccn *ptr = (struct pptp_msg_iccn *)dat;
852 
853 	TCHECK(ptr->peer_call_id);
854 	pptp_peer_call_id_print(&ptr->peer_call_id);
855 	TCHECK(ptr->reserved1);
856 	TCHECK(ptr->conn_speed);
857 	pptp_conn_speed_print(&ptr->conn_speed);
858 	TCHECK(ptr->recv_winsiz);
859 	pptp_recv_winsiz_print(&ptr->recv_winsiz);
860 	TCHECK(ptr->pkt_proc_delay);
861 	pptp_pkt_proc_delay_print(&ptr->pkt_proc_delay);
862 	TCHECK(ptr->framing_type);
863 	pptp_framing_type_print(&ptr->framing_type);
864 
865 	return;
866 
867 trunc:
868 	printf("%s", tstr);
869 }
870 
871 static void
pptp_ccrq_print(const u_char * dat)872 pptp_ccrq_print(const u_char *dat)
873 {
874 	struct pptp_msg_ccrq *ptr = (struct pptp_msg_ccrq *)dat;
875 
876 	TCHECK(ptr->call_id);
877 	pptp_call_id_print(&ptr->call_id);
878 	TCHECK(ptr->reserved1);
879 
880 	return;
881 
882 trunc:
883 	printf("%s", tstr);
884 }
885 
886 static void
pptp_cdn_print(const u_char * dat)887 pptp_cdn_print(const u_char *dat)
888 {
889 	struct pptp_msg_cdn *ptr = (struct pptp_msg_cdn *)dat;
890 
891 	TCHECK(ptr->call_id);
892 	pptp_call_id_print(&ptr->call_id);
893 	TCHECK(ptr->result_code);
894 	pptp_result_code_print(&ptr->result_code, PPTP_CTRL_MSG_TYPE_CDN);
895 	TCHECK(ptr->err_code);
896 	pptp_err_code_print(&ptr->err_code);
897 	TCHECK(ptr->cause_code);
898 	pptp_cause_code_print(&ptr->cause_code);
899 	TCHECK(ptr->reserved1);
900 	TCHECK(ptr->call_stats);
901 	printf(" CALL_STATS(%.128s)", ptr->call_stats);
902 
903 	return;
904 
905 trunc:
906 	printf("%s", tstr);
907 }
908 
909 static void
pptp_wen_print(const u_char * dat)910 pptp_wen_print(const u_char *dat)
911 {
912 	struct pptp_msg_wen *ptr = (struct pptp_msg_wen *)dat;
913 
914 	TCHECK(ptr->peer_call_id);
915 	pptp_peer_call_id_print(&ptr->peer_call_id);
916 	TCHECK(ptr->reserved1);
917 	TCHECK(ptr->crc_err);
918 	printf(" CRC_ERR(%u)", EXTRACT_32BITS(&ptr->crc_err));
919 	TCHECK(ptr->framing_err);
920 	printf(" FRAMING_ERR(%u)", EXTRACT_32BITS(&ptr->framing_err));
921 	TCHECK(ptr->hardware_overrun);
922 	printf(" HARDWARE_OVERRUN(%u)", EXTRACT_32BITS(&ptr->hardware_overrun));
923 	TCHECK(ptr->buffer_overrun);
924 	printf(" BUFFER_OVERRUN(%u)", EXTRACT_32BITS(&ptr->buffer_overrun));
925 	TCHECK(ptr->timeout_err);
926 	printf(" TIMEOUT_ERR(%u)", EXTRACT_32BITS(&ptr->timeout_err));
927 	TCHECK(ptr->align_err);
928 	printf(" ALIGN_ERR(%u)", EXTRACT_32BITS(&ptr->align_err));
929 
930 	return;
931 
932 trunc:
933 	printf("%s", tstr);
934 }
935 
936 static void
pptp_sli_print(const u_char * dat)937 pptp_sli_print(const u_char *dat)
938 {
939 	struct pptp_msg_sli *ptr = (struct pptp_msg_sli *)dat;
940 
941 	TCHECK(ptr->peer_call_id);
942 	pptp_peer_call_id_print(&ptr->peer_call_id);
943 	TCHECK(ptr->reserved1);
944 	TCHECK(ptr->send_accm);
945 	printf(" SEND_ACCM(0x%08x)", EXTRACT_32BITS(&ptr->send_accm));
946 	TCHECK(ptr->recv_accm);
947 	printf(" RECV_ACCM(0x%08x)", EXTRACT_32BITS(&ptr->recv_accm));
948 
949 	return;
950 
951 trunc:
952 	printf("%s", tstr);
953 }
954 
955 void
pptp_print(const u_char * dat)956 pptp_print(const u_char *dat)
957 {
958 	const struct pptp_hdr *hdr;
959 	u_int32_t mc;
960 	u_int16_t ctrl_msg_type;
961 
962 	printf(": pptp");
963 
964 	hdr = (struct pptp_hdr *)dat;
965 
966 	TCHECK(hdr->length);
967 	if (vflag) {
968 		printf(" Length=%u", EXTRACT_16BITS(&hdr->length));
969 	}
970 	TCHECK(hdr->msg_type);
971 	if (vflag) {
972 		switch(EXTRACT_16BITS(&hdr->msg_type)) {
973 		case PPTP_MSG_TYPE_CTRL:
974 			printf(" CTRL-MSG");
975 			break;
976 		case PPTP_MSG_TYPE_MGMT:
977 			printf(" MGMT-MSG");
978 			break;
979 		default:
980 			printf(" UNKNOWN-MSG-TYPE");
981 			break;
982 		}
983 	}
984 
985 	TCHECK(hdr->magic_cookie);
986 	mc = EXTRACT_32BITS(&hdr->magic_cookie);
987 	if (mc != PPTP_MAGIC_COOKIE) {
988 		printf(" UNEXPECTED Magic-Cookie!!(%08x)", mc);
989 	}
990 	if (vflag || mc != PPTP_MAGIC_COOKIE) {
991 		printf(" Magic-Cookie=%08x", mc);
992 	}
993 	TCHECK(hdr->ctrl_msg_type);
994 	ctrl_msg_type = EXTRACT_16BITS(&hdr->ctrl_msg_type);
995 	if (ctrl_msg_type < PPTP_MAX_MSGTYPE_INDEX) {
996 		printf(" CTRL_MSGTYPE=%s",
997 		       pptp_message_type_string[ctrl_msg_type]);
998 	} else {
999 		printf(" UNKNOWN_CTRL_MSGTYPE(%u)", ctrl_msg_type);
1000 	}
1001 	TCHECK(hdr->reserved0);
1002 
1003 	dat += 12;
1004 
1005 	switch(ctrl_msg_type) {
1006 	case PPTP_CTRL_MSG_TYPE_SCCRQ:
1007 		pptp_sccrq_print(dat);
1008 		break;
1009 	case PPTP_CTRL_MSG_TYPE_SCCRP:
1010 		pptp_sccrp_print(dat);
1011 		break;
1012 	case PPTP_CTRL_MSG_TYPE_StopCCRQ:
1013 		pptp_stopccrq_print(dat);
1014 		break;
1015 	case PPTP_CTRL_MSG_TYPE_StopCCRP:
1016 		pptp_stopccrp_print(dat);
1017 		break;
1018 	case PPTP_CTRL_MSG_TYPE_ECHORQ:
1019 		pptp_echorq_print(dat);
1020 		break;
1021 	case PPTP_CTRL_MSG_TYPE_ECHORP:
1022 		pptp_echorp_print(dat);
1023 		break;
1024 	case PPTP_CTRL_MSG_TYPE_OCRQ:
1025 		pptp_ocrq_print(dat);
1026 		break;
1027 	case PPTP_CTRL_MSG_TYPE_OCRP:
1028 		pptp_ocrp_print(dat);
1029 		break;
1030 	case PPTP_CTRL_MSG_TYPE_ICRQ:
1031 		pptp_icrq_print(dat);
1032 		break;
1033 	case PPTP_CTRL_MSG_TYPE_ICRP:
1034 		pptp_icrp_print(dat);
1035 		break;
1036 	case PPTP_CTRL_MSG_TYPE_ICCN:
1037 		pptp_iccn_print(dat);
1038 		break;
1039 	case PPTP_CTRL_MSG_TYPE_CCRQ:
1040 		pptp_ccrq_print(dat);
1041 		break;
1042 	case PPTP_CTRL_MSG_TYPE_CDN:
1043 		pptp_cdn_print(dat);
1044 		break;
1045 	case PPTP_CTRL_MSG_TYPE_WEN:
1046 		pptp_wen_print(dat);
1047 		break;
1048 	case PPTP_CTRL_MSG_TYPE_SLI:
1049 		pptp_sli_print(dat);
1050 		break;
1051 	default:
1052 		/* do nothing */
1053 		break;
1054 	}
1055 
1056 	return;
1057 
1058 trunc:
1059 	printf("%s", tstr);
1060 }
1061