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1 office 1 /*
2 * Copyright (c) 1992, 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  
22 #define NETDISSECT_REWORKED
23 #ifdef HAVE_CONFIG_H
24 #include "config.h"
25 #endif
26  
27 #include <tcpdump-stdinc.h>
28  
29 struct mbuf;
30 struct rtentry;
31  
32 #ifdef HAVE_NETDNET_DNETDB_H
33 #include <netdnet/dnetdb.h>
34 #endif
35  
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <string.h>
39  
40 #include "extract.h"
41 #include "interface.h"
42 #include "addrtoname.h"
43  
44 static const char tstr[] = "[|decnet]";
45  
46 #ifndef WIN32
47 typedef uint8_t byte[1]; /* single byte field */
48 #else
49 /*
50 * the keyword 'byte' generates conflicts in Windows
51 */
52 typedef unsigned char Byte[1]; /* single byte field */
53 #define byte Byte
54 #endif /* WIN32 */
55 typedef uint8_t word[2]; /* 2 byte field */
56 typedef uint8_t longword[4]; /* 4 bytes field */
57  
58 /*
59 * Definitions for DECNET Phase IV protocol headers
60 */
61 union etheraddress {
62 uint8_t dne_addr[6]; /* full ethernet address */
63 struct {
64 uint8_t dne_hiord[4]; /* DECnet HIORD prefix */
65 uint8_t dne_nodeaddr[2]; /* DECnet node address */
66 } dne_remote;
67 };
68  
69 typedef union etheraddress etheraddr; /* Ethernet address */
70  
71 #define HIORD 0x000400aa /* high 32-bits of address (swapped) */
72  
73 #define AREAMASK 0176000 /* mask for area field */
74 #define AREASHIFT 10 /* bit-offset for area field */
75 #define NODEMASK 01777 /* mask for node address field */
76  
77 #define DN_MAXADDL 20 /* max size of DECnet address */
78 struct dn_naddr {
79 uint16_t a_len; /* length of address */
80 uint8_t a_addr[DN_MAXADDL]; /* address as bytes */
81 };
82  
83 /*
84 * Define long and short header formats.
85 */
86 struct shorthdr
87 {
88 byte sh_flags; /* route flags */
89 word sh_dst; /* destination node address */
90 word sh_src; /* source node address */
91 byte sh_visits; /* visit count */
92 };
93  
94 struct longhdr
95 {
96 byte lg_flags; /* route flags */
97 byte lg_darea; /* destination area (reserved) */
98 byte lg_dsarea; /* destination subarea (reserved) */
99 etheraddr lg_dst; /* destination id */
100 byte lg_sarea; /* source area (reserved) */
101 byte lg_ssarea; /* source subarea (reserved) */
102 etheraddr lg_src; /* source id */
103 byte lg_nextl2; /* next level 2 router (reserved) */
104 byte lg_visits; /* visit count */
105 byte lg_service; /* service class (reserved) */
106 byte lg_pt; /* protocol type (reserved) */
107 };
108  
109 union routehdr
110 {
111 struct shorthdr rh_short; /* short route header */
112 struct longhdr rh_long; /* long route header */
113 };
114  
115 /*
116 * Define the values of various fields in the protocol messages.
117 *
118 * 1. Data packet formats.
119 */
120 #define RMF_MASK 7 /* mask for message type */
121 #define RMF_SHORT 2 /* short message format */
122 #define RMF_LONG 6 /* long message format */
123 #ifndef RMF_RQR
124 #define RMF_RQR 010 /* request return to sender */
125 #define RMF_RTS 020 /* returning to sender */
126 #define RMF_IE 040 /* intra-ethernet packet */
127 #endif /* RMR_RQR */
128 #define RMF_FVER 0100 /* future version flag */
129 #define RMF_PAD 0200 /* pad field */
130 #define RMF_PADMASK 0177 /* pad field mask */
131  
132 #define VIS_MASK 077 /* visit field mask */
133  
134 /*
135 * 2. Control packet formats.
136 */
137 #define RMF_CTLMASK 017 /* mask for message type */
138 #define RMF_CTLMSG 01 /* control message indicator */
139 #define RMF_INIT 01 /* initialization message */
140 #define RMF_VER 03 /* verification message */
141 #define RMF_TEST 05 /* hello and test message */
142 #define RMF_L1ROUT 07 /* level 1 routing message */
143 #define RMF_L2ROUT 011 /* level 2 routing message */
144 #define RMF_RHELLO 013 /* router hello message */
145 #define RMF_EHELLO 015 /* endnode hello message */
146  
147 #define TI_L2ROUT 01 /* level 2 router */
148 #define TI_L1ROUT 02 /* level 1 router */
149 #define TI_ENDNODE 03 /* endnode */
150 #define TI_VERIF 04 /* verification required */
151 #define TI_BLOCK 010 /* blocking requested */
152  
153 #define VE_VERS 2 /* version number (2) */
154 #define VE_ECO 0 /* ECO number */
155 #define VE_UECO 0 /* user ECO number (0) */
156  
157 #define P3_VERS 1 /* phase III version number (1) */
158 #define P3_ECO 3 /* ECO number (3) */
159 #define P3_UECO 0 /* user ECO number (0) */
160  
161 #define II_L2ROUT 01 /* level 2 router */
162 #define II_L1ROUT 02 /* level 1 router */
163 #define II_ENDNODE 03 /* endnode */
164 #define II_VERIF 04 /* verification required */
165 #define II_NOMCAST 040 /* no multicast traffic accepted */
166 #define II_BLOCK 0100 /* blocking requested */
167 #define II_TYPEMASK 03 /* mask for node type */
168  
169 #define TESTDATA 0252 /* test data bytes */
170 #define TESTLEN 1 /* length of transmitted test data */
171  
172 /*
173 * Define control message formats.
174 */
175 struct initmsgIII /* phase III initialization message */
176 {
177 byte inIII_flags; /* route flags */
178 word inIII_src; /* source node address */
179 byte inIII_info; /* routing layer information */
180 word inIII_blksize; /* maximum data link block size */
181 byte inIII_vers; /* version number */
182 byte inIII_eco; /* ECO number */
183 byte inIII_ueco; /* user ECO number */
184 byte inIII_rsvd; /* reserved image field */
185 };
186  
187 struct initmsg /* initialization message */
188 {
189 byte in_flags; /* route flags */
190 word in_src; /* source node address */
191 byte in_info; /* routing layer information */
192 word in_blksize; /* maximum data link block size */
193 byte in_vers; /* version number */
194 byte in_eco; /* ECO number */
195 byte in_ueco; /* user ECO number */
196 word in_hello; /* hello timer */
197 byte in_rsvd; /* reserved image field */
198 };
199  
200 struct verifmsg /* verification message */
201 {
202 byte ve_flags; /* route flags */
203 word ve_src; /* source node address */
204 byte ve_fcnval; /* function value image field */
205 };
206  
207 struct testmsg /* hello and test message */
208 {
209 byte te_flags; /* route flags */
210 word te_src; /* source node address */
211 byte te_data; /* test data image field */
212 };
213  
214 struct l1rout /* level 1 routing message */
215 {
216 byte r1_flags; /* route flags */
217 word r1_src; /* source node address */
218 byte r1_rsvd; /* reserved field */
219 };
220  
221 struct l2rout /* level 2 routing message */
222 {
223 byte r2_flags; /* route flags */
224 word r2_src; /* source node address */
225 byte r2_rsvd; /* reserved field */
226 };
227  
228 struct rhellomsg /* router hello message */
229 {
230 byte rh_flags; /* route flags */
231 byte rh_vers; /* version number */
232 byte rh_eco; /* ECO number */
233 byte rh_ueco; /* user ECO number */
234 etheraddr rh_src; /* source id */
235 byte rh_info; /* routing layer information */
236 word rh_blksize; /* maximum data link block size */
237 byte rh_priority; /* router's priority */
238 byte rh_area; /* reserved */
239 word rh_hello; /* hello timer */
240 byte rh_mpd; /* reserved */
241 };
242  
243 struct ehellomsg /* endnode hello message */
244 {
245 byte eh_flags; /* route flags */
246 byte eh_vers; /* version number */
247 byte eh_eco; /* ECO number */
248 byte eh_ueco; /* user ECO number */
249 etheraddr eh_src; /* source id */
250 byte eh_info; /* routing layer information */
251 word eh_blksize; /* maximum data link block size */
252 byte eh_area; /* area (reserved) */
253 byte eh_seed[8]; /* verification seed */
254 etheraddr eh_router; /* designated router */
255 word eh_hello; /* hello timer */
256 byte eh_mpd; /* (reserved) */
257 byte eh_data; /* test data image field */
258 };
259  
260 union controlmsg
261 {
262 struct initmsg cm_init; /* initialization message */
263 struct verifmsg cm_ver; /* verification message */
264 struct testmsg cm_test; /* hello and test message */
265 struct l1rout cm_l1rou; /* level 1 routing message */
266 struct l2rout cm_l2rout; /* level 2 routing message */
267 struct rhellomsg cm_rhello; /* router hello message */
268 struct ehellomsg cm_ehello; /* endnode hello message */
269 };
270  
271 /* Macros for decoding routing-info fields */
272 #define RI_COST(x) ((x)&0777)
273 #define RI_HOPS(x) (((x)>>10)&037)
274  
275 /*
276 * NSP protocol fields and values.
277 */
278  
279 #define NSP_TYPEMASK 014 /* mask to isolate type code */
280 #define NSP_SUBMASK 0160 /* mask to isolate subtype code */
281 #define NSP_SUBSHFT 4 /* shift to move subtype code */
282  
283 #define MFT_DATA 0 /* data message */
284 #define MFT_ACK 04 /* acknowledgement message */
285 #define MFT_CTL 010 /* control message */
286  
287 #define MFS_ILS 020 /* data or I/LS indicator */
288 #define MFS_BOM 040 /* beginning of message (data) */
289 #define MFS_MOM 0 /* middle of message (data) */
290 #define MFS_EOM 0100 /* end of message (data) */
291 #define MFS_INT 040 /* interrupt message */
292  
293 #define MFS_DACK 0 /* data acknowledgement */
294 #define MFS_IACK 020 /* I/LS acknowledgement */
295 #define MFS_CACK 040 /* connect acknowledgement */
296  
297 #define MFS_NOP 0 /* no operation */
298 #define MFS_CI 020 /* connect initiate */
299 #define MFS_CC 040 /* connect confirm */
300 #define MFS_DI 060 /* disconnect initiate */
301 #define MFS_DC 0100 /* disconnect confirm */
302 #define MFS_RCI 0140 /* retransmitted connect initiate */
303  
304 #define SGQ_ACK 0100000 /* ack */
305 #define SGQ_NAK 0110000 /* negative ack */
306 #define SGQ_OACK 0120000 /* other channel ack */
307 #define SGQ_ONAK 0130000 /* other channel negative ack */
308 #define SGQ_MASK 07777 /* mask to isolate seq # */
309 #define SGQ_OTHER 020000 /* other channel qualifier */
310 #define SGQ_DELAY 010000 /* ack delay flag */
311  
312 #define SGQ_EOM 0100000 /* pseudo flag for end-of-message */
313  
314 #define LSM_MASK 03 /* mask for modifier field */
315 #define LSM_NOCHANGE 0 /* no change */
316 #define LSM_DONOTSEND 1 /* do not send data */
317 #define LSM_SEND 2 /* send data */
318  
319 #define LSI_MASK 014 /* mask for interpretation field */
320 #define LSI_DATA 0 /* data segment or message count */
321 #define LSI_INTR 4 /* interrupt request count */
322 #define LSI_INTM 0377 /* funny marker for int. message */
323  
324 #define COS_MASK 014 /* mask for flow control field */
325 #define COS_NONE 0 /* no flow control */
326 #define COS_SEGMENT 04 /* segment flow control */
327 #define COS_MESSAGE 010 /* message flow control */
328 #define COS_CRYPTSER 020 /* cryptographic services requested */
329 #define COS_DEFAULT 1 /* default value for field */
330  
331 #define COI_MASK 3 /* mask for version field */
332 #define COI_32 0 /* version 3.2 */
333 #define COI_31 1 /* version 3.1 */
334 #define COI_40 2 /* version 4.0 */
335 #define COI_41 3 /* version 4.1 */
336  
337 #define MNU_MASK 140 /* mask for session control version */
338 #define MNU_10 000 /* session V1.0 */
339 #define MNU_20 040 /* session V2.0 */
340 #define MNU_ACCESS 1 /* access control present */
341 #define MNU_USRDATA 2 /* user data field present */
342 #define MNU_INVKPROXY 4 /* invoke proxy field present */
343 #define MNU_UICPROXY 8 /* use uic-based proxy */
344  
345 #define DC_NORESOURCES 1 /* no resource reason code */
346 #define DC_NOLINK 41 /* no link terminate reason code */
347 #define DC_COMPLETE 42 /* disconnect complete reason code */
348  
349 #define DI_NOERROR 0 /* user disconnect */
350 #define DI_SHUT 3 /* node is shutting down */
351 #define DI_NOUSER 4 /* destination end user does not exist */
352 #define DI_INVDEST 5 /* invalid end user destination */
353 #define DI_REMRESRC 6 /* insufficient remote resources */
354 #define DI_TPA 8 /* third party abort */
355 #define DI_PROTOCOL 7 /* protocol error discovered */
356 #define DI_ABORT 9 /* user abort */
357 #define DI_LOCALRESRC 32 /* insufficient local resources */
358 #define DI_REMUSERRESRC 33 /* insufficient remote user resources */
359 #define DI_BADACCESS 34 /* bad access control information */
360 #define DI_BADACCNT 36 /* bad ACCOUNT information */
361 #define DI_CONNECTABORT 38 /* connect request cancelled */
362 #define DI_TIMEDOUT 38 /* remote node or user crashed */
363 #define DI_UNREACHABLE 39 /* local timers expired due to ... */
364 #define DI_BADIMAGE 43 /* bad image data in connect */
365 #define DI_SERVMISMATCH 54 /* cryptographic service mismatch */
366  
367 #define UC_OBJREJECT 0 /* object rejected connect */
368 #define UC_USERDISCONNECT 0 /* user disconnect */
369 #define UC_RESOURCES 1 /* insufficient resources (local or remote) */
370 #define UC_NOSUCHNODE 2 /* unrecognized node name */
371 #define UC_REMOTESHUT 3 /* remote node shutting down */
372 #define UC_NOSUCHOBJ 4 /* unrecognized object */
373 #define UC_INVOBJFORMAT 5 /* invalid object name format */
374 #define UC_OBJTOOBUSY 6 /* object too busy */
375 #define UC_NETWORKABORT 8 /* network abort */
376 #define UC_USERABORT 9 /* user abort */
377 #define UC_INVNODEFORMAT 10 /* invalid node name format */
378 #define UC_LOCALSHUT 11 /* local node shutting down */
379 #define UC_ACCESSREJECT 34 /* invalid access control information */
380 #define UC_NORESPONSE 38 /* no response from object */
381 #define UC_UNREACHABLE 39 /* node unreachable */
382  
383 /*
384 * NSP message formats.
385 */
386 struct nsphdr /* general nsp header */
387 {
388 byte nh_flags; /* message flags */
389 word nh_dst; /* destination link address */
390 word nh_src; /* source link address */
391 };
392  
393 struct seghdr /* data segment header */
394 {
395 byte sh_flags; /* message flags */
396 word sh_dst; /* destination link address */
397 word sh_src; /* source link address */
398 word sh_seq[3]; /* sequence numbers */
399 };
400  
401 struct minseghdr /* minimum data segment header */
402 {
403 byte ms_flags; /* message flags */
404 word ms_dst; /* destination link address */
405 word ms_src; /* source link address */
406 word ms_seq; /* sequence number */
407 };
408  
409 struct lsmsg /* link service message (after hdr) */
410 {
411 byte ls_lsflags; /* link service flags */
412 byte ls_fcval; /* flow control value */
413 };
414  
415 struct ackmsg /* acknowledgement message */
416 {
417 byte ak_flags; /* message flags */
418 word ak_dst; /* destination link address */
419 word ak_src; /* source link address */
420 word ak_acknum[2]; /* acknowledgement numbers */
421 };
422  
423 struct minackmsg /* minimum acknowledgement message */
424 {
425 byte mk_flags; /* message flags */
426 word mk_dst; /* destination link address */
427 word mk_src; /* source link address */
428 word mk_acknum; /* acknowledgement number */
429 };
430  
431 struct ciackmsg /* connect acknowledgement message */
432 {
433 byte ck_flags; /* message flags */
434 word ck_dst; /* destination link address */
435 };
436  
437 struct cimsg /* connect initiate message */
438 {
439 byte ci_flags; /* message flags */
440 word ci_dst; /* destination link address (0) */
441 word ci_src; /* source link address */
442 byte ci_services; /* requested services */
443 byte ci_info; /* information */
444 word ci_segsize; /* maximum segment size */
445 };
446  
447 struct ccmsg /* connect confirm message */
448 {
449 byte cc_flags; /* message flags */
450 word cc_dst; /* destination link address */
451 word cc_src; /* source link address */
452 byte cc_services; /* requested services */
453 byte cc_info; /* information */
454 word cc_segsize; /* maximum segment size */
455 byte cc_optlen; /* optional data length */
456 };
457  
458 struct cnmsg /* generic connect message */
459 {
460 byte cn_flags; /* message flags */
461 word cn_dst; /* destination link address */
462 word cn_src; /* source link address */
463 byte cn_services; /* requested services */
464 byte cn_info; /* information */
465 word cn_segsize; /* maximum segment size */
466 };
467  
468 struct dimsg /* disconnect initiate message */
469 {
470 byte di_flags; /* message flags */
471 word di_dst; /* destination link address */
472 word di_src; /* source link address */
473 word di_reason; /* reason code */
474 byte di_optlen; /* optional data length */
475 };
476  
477 struct dcmsg /* disconnect confirm message */
478 {
479 byte dc_flags; /* message flags */
480 word dc_dst; /* destination link address */
481 word dc_src; /* source link address */
482 word dc_reason; /* reason code */
483 };
484  
485 /* Forwards */
486 static int print_decnet_ctlmsg(netdissect_options *, const union routehdr *, u_int, u_int);
487 static void print_t_info(netdissect_options *, int);
488 static int print_l1_routes(netdissect_options *, const char *, u_int);
489 static int print_l2_routes(netdissect_options *, const char *, u_int);
490 static void print_i_info(netdissect_options *, int);
491 static int print_elist(const char *, u_int);
492 static int print_nsp(netdissect_options *, const u_char *, u_int);
493 static void print_reason(netdissect_options *, int);
494 #ifdef PRINT_NSPDATA
495 static void pdata(netdissect_options *, u_char *, u_int);
496 #endif
497  
498 #ifndef HAVE_NETDNET_DNETDB_H_DNET_HTOA
499 extern char *dnet_htoa(struct dn_naddr *);
500 #endif
501  
502 void
503 decnet_print(netdissect_options *ndo,
504 register const u_char *ap, register u_int length,
505 register u_int caplen)
506 {
507 register const union routehdr *rhp;
508 register int mflags;
509 int dst, src, hops;
510 u_int nsplen, pktlen;
511 const u_char *nspp;
512  
513 if (length < sizeof(struct shorthdr)) {
514 ND_PRINT((ndo, "%s", tstr));
515 return;
516 }
517  
518 ND_TCHECK2(*ap, sizeof(short));
519 pktlen = EXTRACT_LE_16BITS(ap);
520 if (pktlen < sizeof(struct shorthdr)) {
521 ND_PRINT((ndo, "%s", tstr));
522 return;
523 }
524 if (pktlen > length) {
525 ND_PRINT((ndo, "%s", tstr));
526 return;
527 }
528 length = pktlen;
529  
530 rhp = (const union routehdr *)&(ap[sizeof(short)]);
531 ND_TCHECK(rhp->rh_short.sh_flags);
532 mflags = EXTRACT_LE_8BITS(rhp->rh_short.sh_flags);
533  
534 if (mflags & RMF_PAD) {
535 /* pad bytes of some sort in front of message */
536 u_int padlen = mflags & RMF_PADMASK;
537 if (ndo->ndo_vflag)
538 ND_PRINT((ndo, "[pad:%d] ", padlen));
539 if (length < padlen + 2) {
540 ND_PRINT((ndo, "%s", tstr));
541 return;
542 }
543 ND_TCHECK2(ap[sizeof(short)], padlen);
544 ap += padlen;
545 length -= padlen;
546 caplen -= padlen;
547 rhp = (const union routehdr *)&(ap[sizeof(short)]);
548 mflags = EXTRACT_LE_8BITS(rhp->rh_short.sh_flags);
549 }
550  
551 if (mflags & RMF_FVER) {
552 ND_PRINT((ndo, "future-version-decnet"));
553 ND_DEFAULTPRINT(ap, min(length, caplen));
554 return;
555 }
556  
557 /* is it a control message? */
558 if (mflags & RMF_CTLMSG) {
559 if (!print_decnet_ctlmsg(ndo, rhp, length, caplen))
560 goto trunc;
561 return;
562 }
563  
564 switch (mflags & RMF_MASK) {
565 case RMF_LONG:
566 if (length < sizeof(struct longhdr)) {
567 ND_PRINT((ndo, "%s", tstr));
568 return;
569 }
570 ND_TCHECK(rhp->rh_long);
571 dst =
572 EXTRACT_LE_16BITS(rhp->rh_long.lg_dst.dne_remote.dne_nodeaddr);
573 src =
574 EXTRACT_LE_16BITS(rhp->rh_long.lg_src.dne_remote.dne_nodeaddr);
575 hops = EXTRACT_LE_8BITS(rhp->rh_long.lg_visits);
576 nspp = &(ap[sizeof(short) + sizeof(struct longhdr)]);
577 nsplen = length - sizeof(struct longhdr);
578 break;
579 case RMF_SHORT:
580 ND_TCHECK(rhp->rh_short);
581 dst = EXTRACT_LE_16BITS(rhp->rh_short.sh_dst);
582 src = EXTRACT_LE_16BITS(rhp->rh_short.sh_src);
583 hops = (EXTRACT_LE_8BITS(rhp->rh_short.sh_visits) & VIS_MASK)+1;
584 nspp = &(ap[sizeof(short) + sizeof(struct shorthdr)]);
585 nsplen = length - sizeof(struct shorthdr);
586 break;
587 default:
588 ND_PRINT((ndo, "unknown message flags under mask"));
589 ND_DEFAULTPRINT((u_char *)ap, min(length, caplen));
590 return;
591 }
592  
593 ND_PRINT((ndo, "%s > %s %d ",
594 dnaddr_string(ndo, src), dnaddr_string(ndo, dst), pktlen));
595 if (ndo->ndo_vflag) {
596 if (mflags & RMF_RQR)
597 ND_PRINT((ndo, "RQR "));
598 if (mflags & RMF_RTS)
599 ND_PRINT((ndo, "RTS "));
600 if (mflags & RMF_IE)
601 ND_PRINT((ndo, "IE "));
602 ND_PRINT((ndo, "%d hops ", hops));
603 }
604  
605 if (!print_nsp(ndo, nspp, nsplen))
606 goto trunc;
607 return;
608  
609 trunc:
610 ND_PRINT((ndo, "%s", tstr));
611 return;
612 }
613  
614 static int
615 print_decnet_ctlmsg(netdissect_options *ndo,
616 register const union routehdr *rhp, u_int length,
617 u_int caplen)
618 {
619 int mflags = EXTRACT_LE_8BITS(rhp->rh_short.sh_flags);
620 register union controlmsg *cmp = (union controlmsg *)rhp;
621 int src, dst, info, blksize, eco, ueco, hello, other, vers;
622 etheraddr srcea, rtea;
623 int priority;
624 char *rhpx = (char *)rhp;
625 int ret;
626  
627 switch (mflags & RMF_CTLMASK) {
628 case RMF_INIT:
629 ND_PRINT((ndo, "init "));
630 if (length < sizeof(struct initmsg))
631 goto trunc;
632 ND_TCHECK(cmp->cm_init);
633 src = EXTRACT_LE_16BITS(cmp->cm_init.in_src);
634 info = EXTRACT_LE_8BITS(cmp->cm_init.in_info);
635 blksize = EXTRACT_LE_16BITS(cmp->cm_init.in_blksize);
636 vers = EXTRACT_LE_8BITS(cmp->cm_init.in_vers);
637 eco = EXTRACT_LE_8BITS(cmp->cm_init.in_eco);
638 ueco = EXTRACT_LE_8BITS(cmp->cm_init.in_ueco);
639 hello = EXTRACT_LE_16BITS(cmp->cm_init.in_hello);
640 print_t_info(ndo, info);
641 ND_PRINT((ndo,
642 "src %sblksize %d vers %d eco %d ueco %d hello %d",
643 dnaddr_string(ndo, src), blksize, vers, eco, ueco,
644 hello));
645 ret = 1;
646 break;
647 case RMF_VER:
648 ND_PRINT((ndo, "verification "));
649 if (length < sizeof(struct verifmsg))
650 goto trunc;
651 ND_TCHECK(cmp->cm_ver);
652 src = EXTRACT_LE_16BITS(cmp->cm_ver.ve_src);
653 other = EXTRACT_LE_8BITS(cmp->cm_ver.ve_fcnval);
654 ND_PRINT((ndo, "src %s fcnval %o", dnaddr_string(ndo, src), other));
655 ret = 1;
656 break;
657 case RMF_TEST:
658 ND_PRINT((ndo, "test "));
659 if (length < sizeof(struct testmsg))
660 goto trunc;
661 ND_TCHECK(cmp->cm_test);
662 src = EXTRACT_LE_16BITS(cmp->cm_test.te_src);
663 other = EXTRACT_LE_8BITS(cmp->cm_test.te_data);
664 ND_PRINT((ndo, "src %s data %o", dnaddr_string(ndo, src), other));
665 ret = 1;
666 break;
667 case RMF_L1ROUT:
668 ND_PRINT((ndo, "lev-1-routing "));
669 if (length < sizeof(struct l1rout))
670 goto trunc;
671 ND_TCHECK(cmp->cm_l1rou);
672 src = EXTRACT_LE_16BITS(cmp->cm_l1rou.r1_src);
673 ND_PRINT((ndo, "src %s ", dnaddr_string(ndo, src)));
674 ret = print_l1_routes(ndo, &(rhpx[sizeof(struct l1rout)]),
675 length - sizeof(struct l1rout));
676 break;
677 case RMF_L2ROUT:
678 ND_PRINT((ndo, "lev-2-routing "));
679 if (length < sizeof(struct l2rout))
680 goto trunc;
681 ND_TCHECK(cmp->cm_l2rout);
682 src = EXTRACT_LE_16BITS(cmp->cm_l2rout.r2_src);
683 ND_PRINT((ndo, "src %s ", dnaddr_string(ndo, src)));
684 ret = print_l2_routes(ndo, &(rhpx[sizeof(struct l2rout)]),
685 length - sizeof(struct l2rout));
686 break;
687 case RMF_RHELLO:
688 ND_PRINT((ndo, "router-hello "));
689 if (length < sizeof(struct rhellomsg))
690 goto trunc;
691 ND_TCHECK(cmp->cm_rhello);
692 vers = EXTRACT_LE_8BITS(cmp->cm_rhello.rh_vers);
693 eco = EXTRACT_LE_8BITS(cmp->cm_rhello.rh_eco);
694 ueco = EXTRACT_LE_8BITS(cmp->cm_rhello.rh_ueco);
695 memcpy((char *)&srcea, (char *)&(cmp->cm_rhello.rh_src),
696 sizeof(srcea));
697 src = EXTRACT_LE_16BITS(srcea.dne_remote.dne_nodeaddr);
698 info = EXTRACT_LE_8BITS(cmp->cm_rhello.rh_info);
699 blksize = EXTRACT_LE_16BITS(cmp->cm_rhello.rh_blksize);
700 priority = EXTRACT_LE_8BITS(cmp->cm_rhello.rh_priority);
701 hello = EXTRACT_LE_16BITS(cmp->cm_rhello.rh_hello);
702 print_i_info(ndo, info);
703 ND_PRINT((ndo,
704 "vers %d eco %d ueco %d src %s blksize %d pri %d hello %d",
705 vers, eco, ueco, dnaddr_string(ndo, src),
706 blksize, priority, hello));
707 ret = print_elist(&(rhpx[sizeof(struct rhellomsg)]),
708 length - sizeof(struct rhellomsg));
709 break;
710 case RMF_EHELLO:
711 ND_PRINT((ndo, "endnode-hello "));
712 if (length < sizeof(struct ehellomsg))
713 goto trunc;
714 ND_TCHECK(cmp->cm_ehello);
715 vers = EXTRACT_LE_8BITS(cmp->cm_ehello.eh_vers);
716 eco = EXTRACT_LE_8BITS(cmp->cm_ehello.eh_eco);
717 ueco = EXTRACT_LE_8BITS(cmp->cm_ehello.eh_ueco);
718 memcpy((char *)&srcea, (char *)&(cmp->cm_ehello.eh_src),
719 sizeof(srcea));
720 src = EXTRACT_LE_16BITS(srcea.dne_remote.dne_nodeaddr);
721 info = EXTRACT_LE_8BITS(cmp->cm_ehello.eh_info);
722 blksize = EXTRACT_LE_16BITS(cmp->cm_ehello.eh_blksize);
723 /*seed*/
724 memcpy((char *)&rtea, (char *)&(cmp->cm_ehello.eh_router),
725 sizeof(rtea));
726 dst = EXTRACT_LE_16BITS(rtea.dne_remote.dne_nodeaddr);
727 hello = EXTRACT_LE_16BITS(cmp->cm_ehello.eh_hello);
728 other = EXTRACT_LE_8BITS(cmp->cm_ehello.eh_data);
729 print_i_info(ndo, info);
730 ND_PRINT((ndo,
731 "vers %d eco %d ueco %d src %s blksize %d rtr %s hello %d data %o",
732 vers, eco, ueco, dnaddr_string(ndo, src),
733 blksize, dnaddr_string(ndo, dst), hello, other));
734 ret = 1;
735 break;
736  
737 default:
738 ND_PRINT((ndo, "unknown control message"));
739 ND_DEFAULTPRINT((u_char *)rhp, min(length, caplen));
740 ret = 1;
741 break;
742 }
743 return (ret);
744  
745 trunc:
746 return (0);
747 }
748  
749 static void
750 print_t_info(netdissect_options *ndo,
751 int info)
752 {
753 int ntype = info & 3;
754 switch (ntype) {
755 case 0: ND_PRINT((ndo, "reserved-ntype? ")); break;
756 case TI_L2ROUT: ND_PRINT((ndo, "l2rout ")); break;
757 case TI_L1ROUT: ND_PRINT((ndo, "l1rout ")); break;
758 case TI_ENDNODE: ND_PRINT((ndo, "endnode ")); break;
759 }
760 if (info & TI_VERIF)
761 ND_PRINT((ndo, "verif "));
762 if (info & TI_BLOCK)
763 ND_PRINT((ndo, "blo "));
764 }
765  
766 static int
767 print_l1_routes(netdissect_options *ndo,
768 const char *rp, u_int len)
769 {
770 int count;
771 int id;
772 int info;
773  
774 /* The last short is a checksum */
775 while (len > (3 * sizeof(short))) {
776 ND_TCHECK2(*rp, 3 * sizeof(short));
777 count = EXTRACT_LE_16BITS(rp);
778 if (count > 1024)
779 return (1); /* seems to be bogus from here on */
780 rp += sizeof(short);
781 len -= sizeof(short);
782 id = EXTRACT_LE_16BITS(rp);
783 rp += sizeof(short);
784 len -= sizeof(short);
785 info = EXTRACT_LE_16BITS(rp);
786 rp += sizeof(short);
787 len -= sizeof(short);
788 ND_PRINT((ndo, "{ids %d-%d cost %d hops %d} ", id, id + count,
789 RI_COST(info), RI_HOPS(info)));
790 }
791 return (1);
792  
793 trunc:
794 return (0);
795 }
796  
797 static int
798 print_l2_routes(netdissect_options *ndo,
799 const char *rp, u_int len)
800 {
801 int count;
802 int area;
803 int info;
804  
805 /* The last short is a checksum */
806 while (len > (3 * sizeof(short))) {
807 ND_TCHECK2(*rp, 3 * sizeof(short));
808 count = EXTRACT_LE_16BITS(rp);
809 if (count > 1024)
810 return (1); /* seems to be bogus from here on */
811 rp += sizeof(short);
812 len -= sizeof(short);
813 area = EXTRACT_LE_16BITS(rp);
814 rp += sizeof(short);
815 len -= sizeof(short);
816 info = EXTRACT_LE_16BITS(rp);
817 rp += sizeof(short);
818 len -= sizeof(short);
819 ND_PRINT((ndo, "{areas %d-%d cost %d hops %d} ", area, area + count,
820 RI_COST(info), RI_HOPS(info)));
821 }
822 return (1);
823  
824 trunc:
825 return (0);
826 }
827  
828 static void
829 print_i_info(netdissect_options *ndo,
830 int info)
831 {
832 int ntype = info & II_TYPEMASK;
833 switch (ntype) {
834 case 0: ND_PRINT((ndo, "reserved-ntype? ")); break;
835 case II_L2ROUT: ND_PRINT((ndo, "l2rout ")); break;
836 case II_L1ROUT: ND_PRINT((ndo, "l1rout ")); break;
837 case II_ENDNODE: ND_PRINT((ndo, "endnode ")); break;
838 }
839 if (info & II_VERIF)
840 ND_PRINT((ndo, "verif "));
841 if (info & II_NOMCAST)
842 ND_PRINT((ndo, "nomcast "));
843 if (info & II_BLOCK)
844 ND_PRINT((ndo, "blo "));
845 }
846  
847 static int
848 print_elist(const char *elp _U_, u_int len _U_)
849 {
850 /* Not enough examples available for me to debug this */
851 return (1);
852 }
853  
854 static int
855 print_nsp(netdissect_options *ndo,
856 const u_char *nspp, u_int nsplen)
857 {
858 const struct nsphdr *nsphp = (struct nsphdr *)nspp;
859 int dst, src, flags;
860  
861 if (nsplen < sizeof(struct nsphdr))
862 goto trunc;
863 ND_TCHECK(*nsphp);
864 flags = EXTRACT_LE_8BITS(nsphp->nh_flags);
865 dst = EXTRACT_LE_16BITS(nsphp->nh_dst);
866 src = EXTRACT_LE_16BITS(nsphp->nh_src);
867  
868 switch (flags & NSP_TYPEMASK) {
869 case MFT_DATA:
870 switch (flags & NSP_SUBMASK) {
871 case MFS_BOM:
872 case MFS_MOM:
873 case MFS_EOM:
874 case MFS_BOM+MFS_EOM:
875 ND_PRINT((ndo, "data %d>%d ", src, dst));
876 {
877 struct seghdr *shp = (struct seghdr *)nspp;
878 int ack;
879 #ifdef PRINT_NSPDATA
880 u_char *dp;
881 #endif
882 u_int data_off = sizeof(struct minseghdr);
883  
884 if (nsplen < data_off)
885 goto trunc;
886 ND_TCHECK(shp->sh_seq[0]);
887 ack = EXTRACT_LE_16BITS(shp->sh_seq[0]);
888 if (ack & SGQ_ACK) { /* acknum field */
889 if ((ack & SGQ_NAK) == SGQ_NAK)
890 ND_PRINT((ndo, "nak %d ", ack & SGQ_MASK));
891 else
892 ND_PRINT((ndo, "ack %d ", ack & SGQ_MASK));
893 data_off += sizeof(short);
894 if (nsplen < data_off)
895 goto trunc;
896 ND_TCHECK(shp->sh_seq[1]);
897 ack = EXTRACT_LE_16BITS(shp->sh_seq[1]);
898 if (ack & SGQ_OACK) { /* ackoth field */
899 if ((ack & SGQ_ONAK) == SGQ_ONAK)
900 ND_PRINT((ndo, "onak %d ", ack & SGQ_MASK));
901 else
902 ND_PRINT((ndo, "oack %d ", ack & SGQ_MASK));
903 data_off += sizeof(short);
904 if (nsplen < data_off)
905 goto trunc;
906 ND_TCHECK(shp->sh_seq[2]);
907 ack = EXTRACT_LE_16BITS(shp->sh_seq[2]);
908 }
909 }
910 ND_PRINT((ndo, "seg %d ", ack & SGQ_MASK));
911 #ifdef PRINT_NSPDATA
912 if (nsplen > data_off) {
913 dp = &(nspp[data_off]);
914 ND_TCHECK2(*dp, nsplen - data_off);
915 pdata(ndo, dp, nsplen - data_off);
916 }
917 #endif
918 }
919 break;
920 case MFS_ILS+MFS_INT:
921 ND_PRINT((ndo, "intr "));
922 {
923 struct seghdr *shp = (struct seghdr *)nspp;
924 int ack;
925 #ifdef PRINT_NSPDATA
926 u_char *dp;
927 #endif
928 u_int data_off = sizeof(struct minseghdr);
929  
930 if (nsplen < data_off)
931 goto trunc;
932 ND_TCHECK(shp->sh_seq[0]);
933 ack = EXTRACT_LE_16BITS(shp->sh_seq[0]);
934 if (ack & SGQ_ACK) { /* acknum field */
935 if ((ack & SGQ_NAK) == SGQ_NAK)
936 ND_PRINT((ndo, "nak %d ", ack & SGQ_MASK));
937 else
938 ND_PRINT((ndo, "ack %d ", ack & SGQ_MASK));
939 data_off += sizeof(short);
940 if (nsplen < data_off)
941 goto trunc;
942 ND_TCHECK(shp->sh_seq[1]);
943 ack = EXTRACT_LE_16BITS(shp->sh_seq[1]);
944 if (ack & SGQ_OACK) { /* ackdat field */
945 if ((ack & SGQ_ONAK) == SGQ_ONAK)
946 ND_PRINT((ndo, "nakdat %d ", ack & SGQ_MASK));
947 else
948 ND_PRINT((ndo, "ackdat %d ", ack & SGQ_MASK));
949 data_off += sizeof(short);
950 if (nsplen < data_off)
951 goto trunc;
952 ND_TCHECK(shp->sh_seq[2]);
953 ack = EXTRACT_LE_16BITS(shp->sh_seq[2]);
954 }
955 }
956 ND_PRINT((ndo, "seg %d ", ack & SGQ_MASK));
957 #ifdef PRINT_NSPDATA
958 if (nsplen > data_off) {
959 dp = &(nspp[data_off]);
960 ND_TCHECK2(*dp, nsplen - data_off);
961 pdata(ndo, dp, nsplen - data_off);
962 }
963 #endif
964 }
965 break;
966 case MFS_ILS:
967 ND_PRINT((ndo, "link-service %d>%d ", src, dst));
968 {
969 struct seghdr *shp = (struct seghdr *)nspp;
970 struct lsmsg *lsmp =
971 (struct lsmsg *)&(nspp[sizeof(struct seghdr)]);
972 int ack;
973 int lsflags, fcval;
974  
975 if (nsplen < sizeof(struct seghdr) + sizeof(struct lsmsg))
976 goto trunc;
977 ND_TCHECK(shp->sh_seq[0]);
978 ack = EXTRACT_LE_16BITS(shp->sh_seq[0]);
979 if (ack & SGQ_ACK) { /* acknum field */
980 if ((ack & SGQ_NAK) == SGQ_NAK)
981 ND_PRINT((ndo, "nak %d ", ack & SGQ_MASK));
982 else
983 ND_PRINT((ndo, "ack %d ", ack & SGQ_MASK));
984 ND_TCHECK(shp->sh_seq[1]);
985 ack = EXTRACT_LE_16BITS(shp->sh_seq[1]);
986 if (ack & SGQ_OACK) { /* ackdat field */
987 if ((ack & SGQ_ONAK) == SGQ_ONAK)
988 ND_PRINT((ndo, "nakdat %d ", ack & SGQ_MASK));
989 else
990 ND_PRINT((ndo, "ackdat %d ", ack & SGQ_MASK));
991 ND_TCHECK(shp->sh_seq[2]);
992 ack = EXTRACT_LE_16BITS(shp->sh_seq[2]);
993 }
994 }
995 ND_PRINT((ndo, "seg %d ", ack & SGQ_MASK));
996 ND_TCHECK(*lsmp);
997 lsflags = EXTRACT_LE_8BITS(lsmp->ls_lsflags);
998 fcval = EXTRACT_LE_8BITS(lsmp->ls_fcval);
999 switch (lsflags & LSI_MASK) {
1000 case LSI_DATA:
1001 ND_PRINT((ndo, "dat seg count %d ", fcval));
1002 switch (lsflags & LSM_MASK) {
1003 case LSM_NOCHANGE:
1004 break;
1005 case LSM_DONOTSEND:
1006 ND_PRINT((ndo, "donotsend-data "));
1007 break;
1008 case LSM_SEND:
1009 ND_PRINT((ndo, "send-data "));
1010 break;
1011 default:
1012 ND_PRINT((ndo, "reserved-fcmod? %x", lsflags));
1013 break;
1014 }
1015 break;
1016 case LSI_INTR:
1017 ND_PRINT((ndo, "intr req count %d ", fcval));
1018 break;
1019 default:
1020 ND_PRINT((ndo, "reserved-fcval-int? %x", lsflags));
1021 break;
1022 }
1023 }
1024 break;
1025 default:
1026 ND_PRINT((ndo, "reserved-subtype? %x %d > %d", flags, src, dst));
1027 break;
1028 }
1029 break;
1030 case MFT_ACK:
1031 switch (flags & NSP_SUBMASK) {
1032 case MFS_DACK:
1033 ND_PRINT((ndo, "data-ack %d>%d ", src, dst));
1034 {
1035 struct ackmsg *amp = (struct ackmsg *)nspp;
1036 int ack;
1037  
1038 if (nsplen < sizeof(struct ackmsg))
1039 goto trunc;
1040 ND_TCHECK(*amp);
1041 ack = EXTRACT_LE_16BITS(amp->ak_acknum[0]);
1042 if (ack & SGQ_ACK) { /* acknum field */
1043 if ((ack & SGQ_NAK) == SGQ_NAK)
1044 ND_PRINT((ndo, "nak %d ", ack & SGQ_MASK));
1045 else
1046 ND_PRINT((ndo, "ack %d ", ack & SGQ_MASK));
1047 ack = EXTRACT_LE_16BITS(amp->ak_acknum[1]);
1048 if (ack & SGQ_OACK) { /* ackoth field */
1049 if ((ack & SGQ_ONAK) == SGQ_ONAK)
1050 ND_PRINT((ndo, "onak %d ", ack & SGQ_MASK));
1051 else
1052 ND_PRINT((ndo, "oack %d ", ack & SGQ_MASK));
1053 }
1054 }
1055 }
1056 break;
1057 case MFS_IACK:
1058 ND_PRINT((ndo, "ils-ack %d>%d ", src, dst));
1059 {
1060 struct ackmsg *amp = (struct ackmsg *)nspp;
1061 int ack;
1062  
1063 if (nsplen < sizeof(struct ackmsg))
1064 goto trunc;
1065 ND_TCHECK(*amp);
1066 ack = EXTRACT_LE_16BITS(amp->ak_acknum[0]);
1067 if (ack & SGQ_ACK) { /* acknum field */
1068 if ((ack & SGQ_NAK) == SGQ_NAK)
1069 ND_PRINT((ndo, "nak %d ", ack & SGQ_MASK));
1070 else
1071 ND_PRINT((ndo, "ack %d ", ack & SGQ_MASK));
1072 ND_TCHECK(amp->ak_acknum[1]);
1073 ack = EXTRACT_LE_16BITS(amp->ak_acknum[1]);
1074 if (ack & SGQ_OACK) { /* ackdat field */
1075 if ((ack & SGQ_ONAK) == SGQ_ONAK)
1076 ND_PRINT((ndo, "nakdat %d ", ack & SGQ_MASK));
1077 else
1078 ND_PRINT((ndo, "ackdat %d ", ack & SGQ_MASK));
1079 }
1080 }
1081 }
1082 break;
1083 case MFS_CACK:
1084 ND_PRINT((ndo, "conn-ack %d", dst));
1085 break;
1086 default:
1087 ND_PRINT((ndo, "reserved-acktype? %x %d > %d", flags, src, dst));
1088 break;
1089 }
1090 break;
1091 case MFT_CTL:
1092 switch (flags & NSP_SUBMASK) {
1093 case MFS_CI:
1094 case MFS_RCI:
1095 if ((flags & NSP_SUBMASK) == MFS_CI)
1096 ND_PRINT((ndo, "conn-initiate "));
1097 else
1098 ND_PRINT((ndo, "retrans-conn-initiate "));
1099 ND_PRINT((ndo, "%d>%d ", src, dst));
1100 {
1101 struct cimsg *cimp = (struct cimsg *)nspp;
1102 int services, info, segsize;
1103 #ifdef PRINT_NSPDATA
1104 u_char *dp;
1105 #endif
1106  
1107 if (nsplen < sizeof(struct cimsg))
1108 goto trunc;
1109 ND_TCHECK(*cimp);
1110 services = EXTRACT_LE_8BITS(cimp->ci_services);
1111 info = EXTRACT_LE_8BITS(cimp->ci_info);
1112 segsize = EXTRACT_LE_16BITS(cimp->ci_segsize);
1113  
1114 switch (services & COS_MASK) {
1115 case COS_NONE:
1116 break;
1117 case COS_SEGMENT:
1118 ND_PRINT((ndo, "seg "));
1119 break;
1120 case COS_MESSAGE:
1121 ND_PRINT((ndo, "msg "));
1122 break;
1123 case COS_CRYPTSER:
1124 ND_PRINT((ndo, "crypt "));
1125 break;
1126 }
1127 switch (info & COI_MASK) {
1128 case COI_32:
1129 ND_PRINT((ndo, "ver 3.2 "));
1130 break;
1131 case COI_31:
1132 ND_PRINT((ndo, "ver 3.1 "));
1133 break;
1134 case COI_40:
1135 ND_PRINT((ndo, "ver 4.0 "));
1136 break;
1137 case COI_41:
1138 ND_PRINT((ndo, "ver 4.1 "));
1139 break;
1140 }
1141 ND_PRINT((ndo, "segsize %d ", segsize));
1142 #ifdef PRINT_NSPDATA
1143 if (nsplen > sizeof(struct cimsg)) {
1144 dp = &(nspp[sizeof(struct cimsg)]);
1145 ND_TCHECK2(*dp, nsplen - sizeof(struct cimsg));
1146 pdata(ndo, dp, nsplen - sizeof(struct cimsg));
1147 }
1148 #endif
1149 }
1150 break;
1151 case MFS_CC:
1152 ND_PRINT((ndo, "conn-confirm %d>%d ", src, dst));
1153 {
1154 struct ccmsg *ccmp = (struct ccmsg *)nspp;
1155 int services, info;
1156 u_int segsize, optlen;
1157 #ifdef PRINT_NSPDATA
1158 u_char *dp;
1159 #endif
1160  
1161 if (nsplen < sizeof(struct ccmsg))
1162 goto trunc;
1163 ND_TCHECK(*ccmp);
1164 services = EXTRACT_LE_8BITS(ccmp->cc_services);
1165 info = EXTRACT_LE_8BITS(ccmp->cc_info);
1166 segsize = EXTRACT_LE_16BITS(ccmp->cc_segsize);
1167 optlen = EXTRACT_LE_8BITS(ccmp->cc_optlen);
1168  
1169 switch (services & COS_MASK) {
1170 case COS_NONE:
1171 break;
1172 case COS_SEGMENT:
1173 ND_PRINT((ndo, "seg "));
1174 break;
1175 case COS_MESSAGE:
1176 ND_PRINT((ndo, "msg "));
1177 break;
1178 case COS_CRYPTSER:
1179 ND_PRINT((ndo, "crypt "));
1180 break;
1181 }
1182 switch (info & COI_MASK) {
1183 case COI_32:
1184 ND_PRINT((ndo, "ver 3.2 "));
1185 break;
1186 case COI_31:
1187 ND_PRINT((ndo, "ver 3.1 "));
1188 break;
1189 case COI_40:
1190 ND_PRINT((ndo, "ver 4.0 "));
1191 break;
1192 case COI_41:
1193 ND_PRINT((ndo, "ver 4.1 "));
1194 break;
1195 }
1196 ND_PRINT((ndo, "segsize %d ", segsize));
1197 if (optlen) {
1198 ND_PRINT((ndo, "optlen %d ", optlen));
1199 #ifdef PRINT_NSPDATA
1200 if (optlen > nsplen - sizeof(struct ccmsg))
1201 goto trunc;
1202 dp = &(nspp[sizeof(struct ccmsg)]);
1203 ND_TCHECK2(*dp, optlen);
1204 pdata(ndo, dp, optlen);
1205 #endif
1206 }
1207 }
1208 break;
1209 case MFS_DI:
1210 ND_PRINT((ndo, "disconn-initiate %d>%d ", src, dst));
1211 {
1212 struct dimsg *dimp = (struct dimsg *)nspp;
1213 int reason;
1214 u_int optlen;
1215 #ifdef PRINT_NSPDATA
1216 u_char *dp;
1217 #endif
1218  
1219 if (nsplen < sizeof(struct dimsg))
1220 goto trunc;
1221 ND_TCHECK(*dimp);
1222 reason = EXTRACT_LE_16BITS(dimp->di_reason);
1223 optlen = EXTRACT_LE_8BITS(dimp->di_optlen);
1224  
1225 print_reason(ndo, reason);
1226 if (optlen) {
1227 ND_PRINT((ndo, "optlen %d ", optlen));
1228 #ifdef PRINT_NSPDATA
1229 if (optlen > nsplen - sizeof(struct dimsg))
1230 goto trunc;
1231 dp = &(nspp[sizeof(struct dimsg)]);
1232 ND_TCHECK2(*dp, optlen);
1233 pdata(ndo, dp, optlen);
1234 #endif
1235 }
1236 }
1237 break;
1238 case MFS_DC:
1239 ND_PRINT((ndo, "disconn-confirm %d>%d ", src, dst));
1240 {
1241 struct dcmsg *dcmp = (struct dcmsg *)nspp;
1242 int reason;
1243  
1244 ND_TCHECK(*dcmp);
1245 reason = EXTRACT_LE_16BITS(dcmp->dc_reason);
1246  
1247 print_reason(ndo, reason);
1248 }
1249 break;
1250 default:
1251 ND_PRINT((ndo, "reserved-ctltype? %x %d > %d", flags, src, dst));
1252 break;
1253 }
1254 break;
1255 default:
1256 ND_PRINT((ndo, "reserved-type? %x %d > %d", flags, src, dst));
1257 break;
1258 }
1259 return (1);
1260  
1261 trunc:
1262 return (0);
1263 }
1264  
1265 static const struct tok reason2str[] = {
1266 { UC_OBJREJECT, "object rejected connect" },
1267 { UC_RESOURCES, "insufficient resources" },
1268 { UC_NOSUCHNODE, "unrecognized node name" },
1269 { DI_SHUT, "node is shutting down" },
1270 { UC_NOSUCHOBJ, "unrecognized object" },
1271 { UC_INVOBJFORMAT, "invalid object name format" },
1272 { UC_OBJTOOBUSY, "object too busy" },
1273 { DI_PROTOCOL, "protocol error discovered" },
1274 { DI_TPA, "third party abort" },
1275 { UC_USERABORT, "user abort" },
1276 { UC_INVNODEFORMAT, "invalid node name format" },
1277 { UC_LOCALSHUT, "local node shutting down" },
1278 { DI_LOCALRESRC, "insufficient local resources" },
1279 { DI_REMUSERRESRC, "insufficient remote user resources" },
1280 { UC_ACCESSREJECT, "invalid access control information" },
1281 { DI_BADACCNT, "bad ACCOUNT information" },
1282 { UC_NORESPONSE, "no response from object" },
1283 { UC_UNREACHABLE, "node unreachable" },
1284 { DC_NOLINK, "no link terminate" },
1285 { DC_COMPLETE, "disconnect complete" },
1286 { DI_BADIMAGE, "bad image data in connect" },
1287 { DI_SERVMISMATCH, "cryptographic service mismatch" },
1288 { 0, NULL }
1289 };
1290  
1291 static void
1292 print_reason(netdissect_options *ndo,
1293 register int reason)
1294 {
1295 ND_PRINT((ndo, "%s ", tok2str(reason2str, "reason-%d", reason)));
1296 }
1297  
1298 const char *
1299 dnnum_string(u_short dnaddr)
1300 {
1301 char *str;
1302 size_t siz;
1303 int area = (u_short)(dnaddr & AREAMASK) >> AREASHIFT;
1304 int node = dnaddr & NODEMASK;
1305  
1306 str = (char *)malloc(siz = sizeof("00.0000"));
1307 if (str == NULL)
1308 error("dnnum_string: malloc");
1309 snprintf(str, siz, "%d.%d", area, node);
1310 return(str);
1311 }
1312  
1313 const char *
1314 dnname_string(u_short dnaddr)
1315 {
1316 #ifdef HAVE_DNET_HTOA
1317 struct dn_naddr dna;
1318 char *dnname;
1319  
1320 dna.a_len = sizeof(short);
1321 memcpy((char *)dna.a_addr, (char *)&dnaddr, sizeof(short));
1322 dnname = dnet_htoa(&dna);
1323 if(dnname != NULL)
1324 return (strdup(dnname));
1325 else
1326 return(dnnum_string(dnaddr));
1327 #else
1328 return(dnnum_string(dnaddr)); /* punt */
1329 #endif
1330 }
1331  
1332 #ifdef PRINT_NSPDATA
1333 static void
1334 pdata(netdissect_options *ndo,
1335 u_char *dp, u_int maxlen)
1336 {
1337 char c;
1338 u_int x = maxlen;
1339  
1340 while (x-- > 0) {
1341 c = *dp++;
1342 safeputchar(ndo, c);
1343 }
1344 }
1345 #endif